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authorStefan Weinhuber <wein@de.ibm.com>2008-01-26 08:11:23 -0500
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-01-26 08:11:28 -0500
commit8e09f21574ea3028d5629e5de759e0b196c690c5 (patch)
treeced4feb1847ee6c2a7b7b4cec8f3118f83d3a386 /drivers
parent0ac30be461084f30ad6e22c6b91347e880ed41aa (diff)
[S390] dasd: add hyper PAV support to DASD device driver, part 1
Parallel access volumes (PAV) is a storage server feature, that allows to start multiple channel programs on the same DASD in parallel. It defines alias devices which can be used as alternative paths to the same disk. With the old base PAV support we only needed rudimentary functionality in the DASD device driver. As the mapping between base and alias devices was static, we just had to export an identifier (uid) and could leave the combining of devices to external layers like a device mapper multipath. Now hyper PAV removes the requirement to dedicate alias devices to specific base devices. Instead each alias devices can be combined with multiple base device on a per request basis. This requires full support by the DASD device driver as now each channel program itself has to identify the target base device. The changes to the dasd device driver and the ECKD discipline are: - Separate subchannel device representation (dasd_device) from block device representation (dasd_block). Only base devices are block devices. - Gather information about base and alias devices and possible combinations. - For each request decide which dasd_device should be used (base or alias) and build specific channel program. - Support summary unit checks, which allow the storage server to upgrade / downgrade between base and hyper PAV at runtime (support is mandatory). Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/s390/block/Makefile4
-rw-r--r--drivers/s390/block/dasd.c1680
-rw-r--r--drivers/s390/block/dasd_3370_erp.c84
-rw-r--r--drivers/s390/block/dasd_3990_erp.c358
-rw-r--r--drivers/s390/block/dasd_9336_erp.c41
-rw-r--r--drivers/s390/block/dasd_9343_erp.c21
-rw-r--r--drivers/s390/block/dasd_alias.c903
-rw-r--r--drivers/s390/block/dasd_devmap.c94
-rw-r--r--drivers/s390/block/dasd_diag.c107
-rw-r--r--drivers/s390/block/dasd_eckd.c787
-rw-r--r--drivers/s390/block/dasd_eckd.h125
-rw-r--r--drivers/s390/block/dasd_eer.c11
-rw-r--r--drivers/s390/block/dasd_erp.c25
-rw-r--r--drivers/s390/block/dasd_fba.c119
-rw-r--r--drivers/s390/block/dasd_genhd.c76
-rw-r--r--drivers/s390/block/dasd_int.h209
-rw-r--r--drivers/s390/block/dasd_ioctl.c172
-rw-r--r--drivers/s390/block/dasd_proc.c21
18 files changed, 3117 insertions, 1720 deletions
diff --git a/drivers/s390/block/Makefile b/drivers/s390/block/Makefile
index be9f22d52fd8..0a89e080b389 100644
--- a/drivers/s390/block/Makefile
+++ b/drivers/s390/block/Makefile
@@ -2,8 +2,8 @@
2# S/390 block devices 2# S/390 block devices
3# 3#
4 4
5dasd_eckd_mod-objs := dasd_eckd.o dasd_3990_erp.o dasd_9343_erp.o 5dasd_eckd_mod-objs := dasd_eckd.o dasd_3990_erp.o dasd_alias.o
6dasd_fba_mod-objs := dasd_fba.o dasd_3370_erp.o dasd_9336_erp.o 6dasd_fba_mod-objs := dasd_fba.o
7dasd_diag_mod-objs := dasd_diag.o 7dasd_diag_mod-objs := dasd_diag.o
8dasd_mod-objs := dasd.o dasd_ioctl.o dasd_proc.o dasd_devmap.o \ 8dasd_mod-objs := dasd.o dasd_ioctl.o dasd_proc.o dasd_devmap.o \
9 dasd_genhd.o dasd_erp.o 9 dasd_genhd.o dasd_erp.o
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index da4fe1ecef9e..db9193d38986 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -48,13 +48,15 @@ MODULE_LICENSE("GPL");
48/* 48/*
49 * SECTION: prototypes for static functions of dasd.c 49 * SECTION: prototypes for static functions of dasd.c
50 */ 50 */
51static int dasd_alloc_queue(struct dasd_device * device); 51static int dasd_alloc_queue(struct dasd_block *);
52static void dasd_setup_queue(struct dasd_device * device); 52static void dasd_setup_queue(struct dasd_block *);
53static void dasd_free_queue(struct dasd_device * device); 53static void dasd_free_queue(struct dasd_block *);
54static void dasd_flush_request_queue(struct dasd_device *); 54static void dasd_flush_request_queue(struct dasd_block *);
55static int dasd_flush_ccw_queue(struct dasd_device *, int); 55static int dasd_flush_block_queue(struct dasd_block *);
56static void dasd_tasklet(struct dasd_device *); 56static void dasd_device_tasklet(struct dasd_device *);
57static void dasd_block_tasklet(struct dasd_block *);
57static void do_kick_device(struct work_struct *); 58static void do_kick_device(struct work_struct *);
59static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *);
58 60
59/* 61/*
60 * SECTION: Operations on the device structure. 62 * SECTION: Operations on the device structure.
@@ -65,26 +67,23 @@ static wait_queue_head_t dasd_flush_wq;
65/* 67/*
66 * Allocate memory for a new device structure. 68 * Allocate memory for a new device structure.
67 */ 69 */
68struct dasd_device * 70struct dasd_device *dasd_alloc_device(void)
69dasd_alloc_device(void)
70{ 71{
71 struct dasd_device *device; 72 struct dasd_device *device;
72 73
73 device = kzalloc(sizeof (struct dasd_device), GFP_ATOMIC); 74 device = kzalloc(sizeof(struct dasd_device), GFP_ATOMIC);
74 if (device == NULL) 75 if (!device)
75 return ERR_PTR(-ENOMEM); 76 return ERR_PTR(-ENOMEM);
76 /* open_count = 0 means device online but not in use */
77 atomic_set(&device->open_count, -1);
78 77
79 /* Get two pages for normal block device operations. */ 78 /* Get two pages for normal block device operations. */
80 device->ccw_mem = (void *) __get_free_pages(GFP_ATOMIC | GFP_DMA, 1); 79 device->ccw_mem = (void *) __get_free_pages(GFP_ATOMIC | GFP_DMA, 1);
81 if (device->ccw_mem == NULL) { 80 if (!device->ccw_mem) {
82 kfree(device); 81 kfree(device);
83 return ERR_PTR(-ENOMEM); 82 return ERR_PTR(-ENOMEM);
84 } 83 }
85 /* Get one page for error recovery. */ 84 /* Get one page for error recovery. */
86 device->erp_mem = (void *) get_zeroed_page(GFP_ATOMIC | GFP_DMA); 85 device->erp_mem = (void *) get_zeroed_page(GFP_ATOMIC | GFP_DMA);
87 if (device->erp_mem == NULL) { 86 if (!device->erp_mem) {
88 free_pages((unsigned long) device->ccw_mem, 1); 87 free_pages((unsigned long) device->ccw_mem, 1);
89 kfree(device); 88 kfree(device);
90 return ERR_PTR(-ENOMEM); 89 return ERR_PTR(-ENOMEM);
@@ -93,10 +92,9 @@ dasd_alloc_device(void)
93 dasd_init_chunklist(&device->ccw_chunks, device->ccw_mem, PAGE_SIZE*2); 92 dasd_init_chunklist(&device->ccw_chunks, device->ccw_mem, PAGE_SIZE*2);
94 dasd_init_chunklist(&device->erp_chunks, device->erp_mem, PAGE_SIZE); 93 dasd_init_chunklist(&device->erp_chunks, device->erp_mem, PAGE_SIZE);
95 spin_lock_init(&device->mem_lock); 94 spin_lock_init(&device->mem_lock);
96 spin_lock_init(&device->request_queue_lock); 95 atomic_set(&device->tasklet_scheduled, 0);
97 atomic_set (&device->tasklet_scheduled, 0);
98 tasklet_init(&device->tasklet, 96 tasklet_init(&device->tasklet,
99 (void (*)(unsigned long)) dasd_tasklet, 97 (void (*)(unsigned long)) dasd_device_tasklet,
100 (unsigned long) device); 98 (unsigned long) device);
101 INIT_LIST_HEAD(&device->ccw_queue); 99 INIT_LIST_HEAD(&device->ccw_queue);
102 init_timer(&device->timer); 100 init_timer(&device->timer);
@@ -110,8 +108,7 @@ dasd_alloc_device(void)
110/* 108/*
111 * Free memory of a device structure. 109 * Free memory of a device structure.
112 */ 110 */
113void 111void dasd_free_device(struct dasd_device *device)
114dasd_free_device(struct dasd_device *device)
115{ 112{
116 kfree(device->private); 113 kfree(device->private);
117 free_page((unsigned long) device->erp_mem); 114 free_page((unsigned long) device->erp_mem);
@@ -120,10 +117,42 @@ dasd_free_device(struct dasd_device *device)
120} 117}
121 118
122/* 119/*
120 * Allocate memory for a new device structure.
121 */
122struct dasd_block *dasd_alloc_block(void)
123{
124 struct dasd_block *block;
125
126 block = kzalloc(sizeof(*block), GFP_ATOMIC);
127 if (!block)
128 return ERR_PTR(-ENOMEM);
129 /* open_count = 0 means device online but not in use */
130 atomic_set(&block->open_count, -1);
131
132 spin_lock_init(&block->request_queue_lock);
133 atomic_set(&block->tasklet_scheduled, 0);
134 tasklet_init(&block->tasklet,
135 (void (*)(unsigned long)) dasd_block_tasklet,
136 (unsigned long) block);
137 INIT_LIST_HEAD(&block->ccw_queue);
138 spin_lock_init(&block->queue_lock);
139 init_timer(&block->timer);
140
141 return block;
142}
143
144/*
145 * Free memory of a device structure.
146 */
147void dasd_free_block(struct dasd_block *block)
148{
149 kfree(block);
150}
151
152/*
123 * Make a new device known to the system. 153 * Make a new device known to the system.
124 */ 154 */
125static int 155static int dasd_state_new_to_known(struct dasd_device *device)
126dasd_state_new_to_known(struct dasd_device *device)
127{ 156{
128 int rc; 157 int rc;
129 158
@@ -133,12 +162,13 @@ dasd_state_new_to_known(struct dasd_device *device)
133 */ 162 */
134 dasd_get_device(device); 163 dasd_get_device(device);
135 164
136 rc = dasd_alloc_queue(device); 165 if (device->block) {
137 if (rc) { 166 rc = dasd_alloc_queue(device->block);
138 dasd_put_device(device); 167 if (rc) {
139 return rc; 168 dasd_put_device(device);
169 return rc;
170 }
140 } 171 }
141
142 device->state = DASD_STATE_KNOWN; 172 device->state = DASD_STATE_KNOWN;
143 return 0; 173 return 0;
144} 174}
@@ -146,21 +176,24 @@ dasd_state_new_to_known(struct dasd_device *device)
146/* 176/*
147 * Let the system forget about a device. 177 * Let the system forget about a device.
148 */ 178 */
149static int 179static int dasd_state_known_to_new(struct dasd_device *device)
150dasd_state_known_to_new(struct dasd_device * device)
151{ 180{
152 /* Disable extended error reporting for this device. */ 181 /* Disable extended error reporting for this device. */
153 dasd_eer_disable(device); 182 dasd_eer_disable(device);
154 /* Forget the discipline information. */ 183 /* Forget the discipline information. */
155 if (device->discipline) 184 if (device->discipline) {
185 if (device->discipline->uncheck_device)
186 device->discipline->uncheck_device(device);
156 module_put(device->discipline->owner); 187 module_put(device->discipline->owner);
188 }
157 device->discipline = NULL; 189 device->discipline = NULL;
158 if (device->base_discipline) 190 if (device->base_discipline)
159 module_put(device->base_discipline->owner); 191 module_put(device->base_discipline->owner);
160 device->base_discipline = NULL; 192 device->base_discipline = NULL;
161 device->state = DASD_STATE_NEW; 193 device->state = DASD_STATE_NEW;
162 194
163 dasd_free_queue(device); 195 if (device->block)
196 dasd_free_queue(device->block);
164 197
165 /* Give up reference we took in dasd_state_new_to_known. */ 198 /* Give up reference we took in dasd_state_new_to_known. */
166 dasd_put_device(device); 199 dasd_put_device(device);
@@ -170,19 +203,19 @@ dasd_state_known_to_new(struct dasd_device * device)
170/* 203/*
171 * Request the irq line for the device. 204 * Request the irq line for the device.
172 */ 205 */
173static int 206static int dasd_state_known_to_basic(struct dasd_device *device)
174dasd_state_known_to_basic(struct dasd_device * device)
175{ 207{
176 int rc; 208 int rc;
177 209
178 /* Allocate and register gendisk structure. */ 210 /* Allocate and register gendisk structure. */
179 rc = dasd_gendisk_alloc(device); 211 if (device->block) {
180 if (rc) 212 rc = dasd_gendisk_alloc(device->block);
181 return rc; 213 if (rc)
182 214 return rc;
215 }
183 /* register 'device' debug area, used for all DBF_DEV_XXX calls */ 216 /* register 'device' debug area, used for all DBF_DEV_XXX calls */
184 device->debug_area = debug_register(device->cdev->dev.bus_id, 1, 2, 217 device->debug_area = debug_register(device->cdev->dev.bus_id, 1, 2,
185 8 * sizeof (long)); 218 8 * sizeof(long));
186 debug_register_view(device->debug_area, &debug_sprintf_view); 219 debug_register_view(device->debug_area, &debug_sprintf_view);
187 debug_set_level(device->debug_area, DBF_WARNING); 220 debug_set_level(device->debug_area, DBF_WARNING);
188 DBF_DEV_EVENT(DBF_EMERG, device, "%s", "debug area created"); 221 DBF_DEV_EVENT(DBF_EMERG, device, "%s", "debug area created");
@@ -194,16 +227,17 @@ dasd_state_known_to_basic(struct dasd_device * device)
194/* 227/*
195 * Release the irq line for the device. Terminate any running i/o. 228 * Release the irq line for the device. Terminate any running i/o.
196 */ 229 */
197static int 230static int dasd_state_basic_to_known(struct dasd_device *device)
198dasd_state_basic_to_known(struct dasd_device * device)
199{ 231{
200 int rc; 232 int rc;
201 233 if (device->block) {
202 dasd_gendisk_free(device); 234 dasd_gendisk_free(device->block);
203 rc = dasd_flush_ccw_queue(device, 1); 235 dasd_block_clear_timer(device->block);
236 }
237 rc = dasd_flush_device_queue(device);
204 if (rc) 238 if (rc)
205 return rc; 239 return rc;
206 dasd_clear_timer(device); 240 dasd_device_clear_timer(device);
207 241
208 DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device); 242 DBF_DEV_EVENT(DBF_EMERG, device, "%p debug area deleted", device);
209 if (device->debug_area != NULL) { 243 if (device->debug_area != NULL) {
@@ -228,26 +262,32 @@ dasd_state_basic_to_known(struct dasd_device * device)
228 * In case the analysis returns an error, the device setup is stopped 262 * In case the analysis returns an error, the device setup is stopped
229 * (a fake disk was already added to allow formatting). 263 * (a fake disk was already added to allow formatting).
230 */ 264 */
231static int 265static int dasd_state_basic_to_ready(struct dasd_device *device)
232dasd_state_basic_to_ready(struct dasd_device * device)
233{ 266{
234 int rc; 267 int rc;
268 struct dasd_block *block;
235 269
236 rc = 0; 270 rc = 0;
237 if (device->discipline->do_analysis != NULL) 271 block = device->block;
238 rc = device->discipline->do_analysis(device);
239 if (rc) {
240 if (rc != -EAGAIN)
241 device->state = DASD_STATE_UNFMT;
242 return rc;
243 }
244 /* make disk known with correct capacity */ 272 /* make disk known with correct capacity */
245 dasd_setup_queue(device); 273 if (block) {
246 set_capacity(device->gdp, device->blocks << device->s2b_shift); 274 if (block->base->discipline->do_analysis != NULL)
247 device->state = DASD_STATE_READY; 275 rc = block->base->discipline->do_analysis(block);
248 rc = dasd_scan_partitions(device); 276 if (rc) {
249 if (rc) 277 if (rc != -EAGAIN)
250 device->state = DASD_STATE_BASIC; 278 device->state = DASD_STATE_UNFMT;
279 return rc;
280 }
281 dasd_setup_queue(block);
282 set_capacity(block->gdp,
283 block->blocks << block->s2b_shift);
284 device->state = DASD_STATE_READY;
285 rc = dasd_scan_partitions(block);
286 if (rc)
287 device->state = DASD_STATE_BASIC;
288 } else {
289 device->state = DASD_STATE_READY;
290 }
251 return rc; 291 return rc;
252} 292}
253 293
@@ -256,28 +296,31 @@ dasd_state_basic_to_ready(struct dasd_device * device)
256 * Forget format information. Check if the target level is basic 296 * Forget format information. Check if the target level is basic
257 * and if it is create fake disk for formatting. 297 * and if it is create fake disk for formatting.
258 */ 298 */
259static int 299static int dasd_state_ready_to_basic(struct dasd_device *device)
260dasd_state_ready_to_basic(struct dasd_device * device)
261{ 300{
262 int rc; 301 int rc;
263 302
264 rc = dasd_flush_ccw_queue(device, 0);
265 if (rc)
266 return rc;
267 dasd_destroy_partitions(device);
268 dasd_flush_request_queue(device);
269 device->blocks = 0;
270 device->bp_block = 0;
271 device->s2b_shift = 0;
272 device->state = DASD_STATE_BASIC; 303 device->state = DASD_STATE_BASIC;
304 if (device->block) {
305 struct dasd_block *block = device->block;
306 rc = dasd_flush_block_queue(block);
307 if (rc) {
308 device->state = DASD_STATE_READY;
309 return rc;
310 }
311 dasd_destroy_partitions(block);
312 dasd_flush_request_queue(block);
313 block->blocks = 0;
314 block->bp_block = 0;
315 block->s2b_shift = 0;
316 }
273 return 0; 317 return 0;
274} 318}
275 319
276/* 320/*
277 * Back to basic. 321 * Back to basic.
278 */ 322 */
279static int 323static int dasd_state_unfmt_to_basic(struct dasd_device *device)
280dasd_state_unfmt_to_basic(struct dasd_device * device)
281{ 324{
282 device->state = DASD_STATE_BASIC; 325 device->state = DASD_STATE_BASIC;
283 return 0; 326 return 0;
@@ -291,17 +334,31 @@ dasd_state_unfmt_to_basic(struct dasd_device * device)
291static int 334static int
292dasd_state_ready_to_online(struct dasd_device * device) 335dasd_state_ready_to_online(struct dasd_device * device)
293{ 336{
337 int rc;
338
339 if (device->discipline->ready_to_online) {
340 rc = device->discipline->ready_to_online(device);
341 if (rc)
342 return rc;
343 }
294 device->state = DASD_STATE_ONLINE; 344 device->state = DASD_STATE_ONLINE;
295 dasd_schedule_bh(device); 345 if (device->block)
346 dasd_schedule_block_bh(device->block);
296 return 0; 347 return 0;
297} 348}
298 349
299/* 350/*
300 * Stop the requeueing of requests again. 351 * Stop the requeueing of requests again.
301 */ 352 */
302static int 353static int dasd_state_online_to_ready(struct dasd_device *device)
303dasd_state_online_to_ready(struct dasd_device * device)
304{ 354{
355 int rc;
356
357 if (device->discipline->online_to_ready) {
358 rc = device->discipline->online_to_ready(device);
359 if (rc)
360 return rc;
361 }
305 device->state = DASD_STATE_READY; 362 device->state = DASD_STATE_READY;
306 return 0; 363 return 0;
307} 364}
@@ -309,8 +366,7 @@ dasd_state_online_to_ready(struct dasd_device * device)
309/* 366/*
310 * Device startup state changes. 367 * Device startup state changes.
311 */ 368 */
312static int 369static int dasd_increase_state(struct dasd_device *device)
313dasd_increase_state(struct dasd_device *device)
314{ 370{
315 int rc; 371 int rc;
316 372
@@ -345,8 +401,7 @@ dasd_increase_state(struct dasd_device *device)
345/* 401/*
346 * Device shutdown state changes. 402 * Device shutdown state changes.
347 */ 403 */
348static int 404static int dasd_decrease_state(struct dasd_device *device)
349dasd_decrease_state(struct dasd_device *device)
350{ 405{
351 int rc; 406 int rc;
352 407
@@ -381,8 +436,7 @@ dasd_decrease_state(struct dasd_device *device)
381/* 436/*
382 * This is the main startup/shutdown routine. 437 * This is the main startup/shutdown routine.
383 */ 438 */
384static void 439static void dasd_change_state(struct dasd_device *device)
385dasd_change_state(struct dasd_device *device)
386{ 440{
387 int rc; 441 int rc;
388 442
@@ -409,17 +463,15 @@ dasd_change_state(struct dasd_device *device)
409 * dasd_kick_device will schedule a call do do_kick_device to the kernel 463 * dasd_kick_device will schedule a call do do_kick_device to the kernel
410 * event daemon. 464 * event daemon.
411 */ 465 */
412static void 466static void do_kick_device(struct work_struct *work)
413do_kick_device(struct work_struct *work)
414{ 467{
415 struct dasd_device *device = container_of(work, struct dasd_device, kick_work); 468 struct dasd_device *device = container_of(work, struct dasd_device, kick_work);
416 dasd_change_state(device); 469 dasd_change_state(device);
417 dasd_schedule_bh(device); 470 dasd_schedule_device_bh(device);
418 dasd_put_device(device); 471 dasd_put_device(device);
419} 472}
420 473
421void 474void dasd_kick_device(struct dasd_device *device)
422dasd_kick_device(struct dasd_device *device)
423{ 475{
424 dasd_get_device(device); 476 dasd_get_device(device);
425 /* queue call to dasd_kick_device to the kernel event daemon. */ 477 /* queue call to dasd_kick_device to the kernel event daemon. */
@@ -429,8 +481,7 @@ dasd_kick_device(struct dasd_device *device)
429/* 481/*
430 * Set the target state for a device and starts the state change. 482 * Set the target state for a device and starts the state change.
431 */ 483 */
432void 484void dasd_set_target_state(struct dasd_device *device, int target)
433dasd_set_target_state(struct dasd_device *device, int target)
434{ 485{
435 /* If we are in probeonly mode stop at DASD_STATE_READY. */ 486 /* If we are in probeonly mode stop at DASD_STATE_READY. */
436 if (dasd_probeonly && target > DASD_STATE_READY) 487 if (dasd_probeonly && target > DASD_STATE_READY)
@@ -447,14 +498,12 @@ dasd_set_target_state(struct dasd_device *device, int target)
447/* 498/*
448 * Enable devices with device numbers in [from..to]. 499 * Enable devices with device numbers in [from..to].
449 */ 500 */
450static inline int 501static inline int _wait_for_device(struct dasd_device *device)
451_wait_for_device(struct dasd_device *device)
452{ 502{
453 return (device->state == device->target); 503 return (device->state == device->target);
454} 504}
455 505
456void 506void dasd_enable_device(struct dasd_device *device)
457dasd_enable_device(struct dasd_device *device)
458{ 507{
459 dasd_set_target_state(device, DASD_STATE_ONLINE); 508 dasd_set_target_state(device, DASD_STATE_ONLINE);
460 if (device->state <= DASD_STATE_KNOWN) 509 if (device->state <= DASD_STATE_KNOWN)
@@ -475,20 +524,20 @@ unsigned int dasd_profile_level = DASD_PROFILE_OFF;
475/* 524/*
476 * Increments counter in global and local profiling structures. 525 * Increments counter in global and local profiling structures.
477 */ 526 */
478#define dasd_profile_counter(value, counter, device) \ 527#define dasd_profile_counter(value, counter, block) \
479{ \ 528{ \
480 int index; \ 529 int index; \
481 for (index = 0; index < 31 && value >> (2+index); index++); \ 530 for (index = 0; index < 31 && value >> (2+index); index++); \
482 dasd_global_profile.counter[index]++; \ 531 dasd_global_profile.counter[index]++; \
483 device->profile.counter[index]++; \ 532 block->profile.counter[index]++; \
484} 533}
485 534
486/* 535/*
487 * Add profiling information for cqr before execution. 536 * Add profiling information for cqr before execution.
488 */ 537 */
489static void 538static void dasd_profile_start(struct dasd_block *block,
490dasd_profile_start(struct dasd_device *device, struct dasd_ccw_req * cqr, 539 struct dasd_ccw_req *cqr,
491 struct request *req) 540 struct request *req)
492{ 541{
493 struct list_head *l; 542 struct list_head *l;
494 unsigned int counter; 543 unsigned int counter;
@@ -498,19 +547,19 @@ dasd_profile_start(struct dasd_device *device, struct dasd_ccw_req * cqr,
498 547
499 /* count the length of the chanq for statistics */ 548 /* count the length of the chanq for statistics */
500 counter = 0; 549 counter = 0;
501 list_for_each(l, &device->ccw_queue) 550 list_for_each(l, &block->ccw_queue)
502 if (++counter >= 31) 551 if (++counter >= 31)
503 break; 552 break;
504 dasd_global_profile.dasd_io_nr_req[counter]++; 553 dasd_global_profile.dasd_io_nr_req[counter]++;
505 device->profile.dasd_io_nr_req[counter]++; 554 block->profile.dasd_io_nr_req[counter]++;
506} 555}
507 556
508/* 557/*
509 * Add profiling information for cqr after execution. 558 * Add profiling information for cqr after execution.
510 */ 559 */
511static void 560static void dasd_profile_end(struct dasd_block *block,
512dasd_profile_end(struct dasd_device *device, struct dasd_ccw_req * cqr, 561 struct dasd_ccw_req *cqr,
513 struct request *req) 562 struct request *req)
514{ 563{
515 long strtime, irqtime, endtime, tottime; /* in microseconds */ 564 long strtime, irqtime, endtime, tottime; /* in microseconds */
516 long tottimeps, sectors; 565 long tottimeps, sectors;
@@ -532,27 +581,27 @@ dasd_profile_end(struct dasd_device *device, struct dasd_ccw_req * cqr,
532 581
533 if (!dasd_global_profile.dasd_io_reqs) 582 if (!dasd_global_profile.dasd_io_reqs)
534 memset(&dasd_global_profile, 0, 583 memset(&dasd_global_profile, 0,
535 sizeof (struct dasd_profile_info_t)); 584 sizeof(struct dasd_profile_info_t));
536 dasd_global_profile.dasd_io_reqs++; 585 dasd_global_profile.dasd_io_reqs++;
537 dasd_global_profile.dasd_io_sects += sectors; 586 dasd_global_profile.dasd_io_sects += sectors;
538 587
539 if (!device->profile.dasd_io_reqs) 588 if (!block->profile.dasd_io_reqs)
540 memset(&device->profile, 0, 589 memset(&block->profile, 0,
541 sizeof (struct dasd_profile_info_t)); 590 sizeof(struct dasd_profile_info_t));
542 device->profile.dasd_io_reqs++; 591 block->profile.dasd_io_reqs++;
543 device->profile.dasd_io_sects += sectors; 592 block->profile.dasd_io_sects += sectors;
544 593
545 dasd_profile_counter(sectors, dasd_io_secs, device); 594 dasd_profile_counter(sectors, dasd_io_secs, block);
546 dasd_profile_counter(tottime, dasd_io_times, device); 595 dasd_profile_counter(tottime, dasd_io_times, block);
547 dasd_profile_counter(tottimeps, dasd_io_timps, device); 596 dasd_profile_counter(tottimeps, dasd_io_timps, block);
548 dasd_profile_counter(strtime, dasd_io_time1, device); 597 dasd_profile_counter(strtime, dasd_io_time1, block);
549 dasd_profile_counter(irqtime, dasd_io_time2, device); 598 dasd_profile_counter(irqtime, dasd_io_time2, block);
550 dasd_profile_counter(irqtime / sectors, dasd_io_time2ps, device); 599 dasd_profile_counter(irqtime / sectors, dasd_io_time2ps, block);
551 dasd_profile_counter(endtime, dasd_io_time3, device); 600 dasd_profile_counter(endtime, dasd_io_time3, block);
552} 601}
553#else 602#else
554#define dasd_profile_start(device, cqr, req) do {} while (0) 603#define dasd_profile_start(block, cqr, req) do {} while (0)
555#define dasd_profile_end(device, cqr, req) do {} while (0) 604#define dasd_profile_end(block, cqr, req) do {} while (0)
556#endif /* CONFIG_DASD_PROFILE */ 605#endif /* CONFIG_DASD_PROFILE */
557 606
558/* 607/*
@@ -562,9 +611,9 @@ dasd_profile_end(struct dasd_device *device, struct dasd_ccw_req * cqr,
562 * memory and 2) dasd_smalloc_request uses the static ccw memory 611 * memory and 2) dasd_smalloc_request uses the static ccw memory
563 * that gets allocated for each device. 612 * that gets allocated for each device.
564 */ 613 */
565struct dasd_ccw_req * 614struct dasd_ccw_req *dasd_kmalloc_request(char *magic, int cplength,
566dasd_kmalloc_request(char *magic, int cplength, int datasize, 615 int datasize,
567 struct dasd_device * device) 616 struct dasd_device *device)
568{ 617{
569 struct dasd_ccw_req *cqr; 618 struct dasd_ccw_req *cqr;
570 619
@@ -600,9 +649,9 @@ dasd_kmalloc_request(char *magic, int cplength, int datasize,
600 return cqr; 649 return cqr;
601} 650}
602 651
603struct dasd_ccw_req * 652struct dasd_ccw_req *dasd_smalloc_request(char *magic, int cplength,
604dasd_smalloc_request(char *magic, int cplength, int datasize, 653 int datasize,
605 struct dasd_device * device) 654 struct dasd_device *device)
606{ 655{
607 unsigned long flags; 656 unsigned long flags;
608 struct dasd_ccw_req *cqr; 657 struct dasd_ccw_req *cqr;
@@ -649,8 +698,7 @@ dasd_smalloc_request(char *magic, int cplength, int datasize,
649 * idal lists that might have been created by dasd_set_cda and the 698 * idal lists that might have been created by dasd_set_cda and the
650 * struct dasd_ccw_req itself. 699 * struct dasd_ccw_req itself.
651 */ 700 */
652void 701void dasd_kfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device)
653dasd_kfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device)
654{ 702{
655#ifdef CONFIG_64BIT 703#ifdef CONFIG_64BIT
656 struct ccw1 *ccw; 704 struct ccw1 *ccw;
@@ -667,8 +715,7 @@ dasd_kfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device)
667 dasd_put_device(device); 715 dasd_put_device(device);
668} 716}
669 717
670void 718void dasd_sfree_request(struct dasd_ccw_req *cqr, struct dasd_device *device)
671dasd_sfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device)
672{ 719{
673 unsigned long flags; 720 unsigned long flags;
674 721
@@ -681,14 +728,13 @@ dasd_sfree_request(struct dasd_ccw_req * cqr, struct dasd_device * device)
681/* 728/*
682 * Check discipline magic in cqr. 729 * Check discipline magic in cqr.
683 */ 730 */
684static inline int 731static inline int dasd_check_cqr(struct dasd_ccw_req *cqr)
685dasd_check_cqr(struct dasd_ccw_req *cqr)
686{ 732{
687 struct dasd_device *device; 733 struct dasd_device *device;
688 734
689 if (cqr == NULL) 735 if (cqr == NULL)
690 return -EINVAL; 736 return -EINVAL;
691 device = cqr->device; 737 device = cqr->startdev;
692 if (strncmp((char *) &cqr->magic, device->discipline->ebcname, 4)) { 738 if (strncmp((char *) &cqr->magic, device->discipline->ebcname, 4)) {
693 DEV_MESSAGE(KERN_WARNING, device, 739 DEV_MESSAGE(KERN_WARNING, device,
694 " dasd_ccw_req 0x%08x magic doesn't match" 740 " dasd_ccw_req 0x%08x magic doesn't match"
@@ -706,8 +752,7 @@ dasd_check_cqr(struct dasd_ccw_req *cqr)
706 * ccw_device_clear can fail if the i/o subsystem 752 * ccw_device_clear can fail if the i/o subsystem
707 * is in a bad mood. 753 * is in a bad mood.
708 */ 754 */
709int 755int dasd_term_IO(struct dasd_ccw_req *cqr)
710dasd_term_IO(struct dasd_ccw_req * cqr)
711{ 756{
712 struct dasd_device *device; 757 struct dasd_device *device;
713 int retries, rc; 758 int retries, rc;
@@ -717,13 +762,13 @@ dasd_term_IO(struct dasd_ccw_req * cqr)
717 if (rc) 762 if (rc)
718 return rc; 763 return rc;
719 retries = 0; 764 retries = 0;
720 device = (struct dasd_device *) cqr->device; 765 device = (struct dasd_device *) cqr->startdev;
721 while ((retries < 5) && (cqr->status == DASD_CQR_IN_IO)) { 766 while ((retries < 5) && (cqr->status == DASD_CQR_IN_IO)) {
722 rc = ccw_device_clear(device->cdev, (long) cqr); 767 rc = ccw_device_clear(device->cdev, (long) cqr);
723 switch (rc) { 768 switch (rc) {
724 case 0: /* termination successful */ 769 case 0: /* termination successful */
725 cqr->retries--; 770 cqr->retries--;
726 cqr->status = DASD_CQR_CLEAR; 771 cqr->status = DASD_CQR_CLEAR_PENDING;
727 cqr->stopclk = get_clock(); 772 cqr->stopclk = get_clock();
728 cqr->starttime = 0; 773 cqr->starttime = 0;
729 DBF_DEV_EVENT(DBF_DEBUG, device, 774 DBF_DEV_EVENT(DBF_DEBUG, device,
@@ -753,7 +798,7 @@ dasd_term_IO(struct dasd_ccw_req * cqr)
753 } 798 }
754 retries++; 799 retries++;
755 } 800 }
756 dasd_schedule_bh(device); 801 dasd_schedule_device_bh(device);
757 return rc; 802 return rc;
758} 803}
759 804
@@ -761,8 +806,7 @@ dasd_term_IO(struct dasd_ccw_req * cqr)
761 * Start the i/o. This start_IO can fail if the channel is really busy. 806 * Start the i/o. This start_IO can fail if the channel is really busy.
762 * In that case set up a timer to start the request later. 807 * In that case set up a timer to start the request later.
763 */ 808 */
764int 809int dasd_start_IO(struct dasd_ccw_req *cqr)
765dasd_start_IO(struct dasd_ccw_req * cqr)
766{ 810{
767 struct dasd_device *device; 811 struct dasd_device *device;
768 int rc; 812 int rc;
@@ -771,12 +815,12 @@ dasd_start_IO(struct dasd_ccw_req * cqr)
771 rc = dasd_check_cqr(cqr); 815 rc = dasd_check_cqr(cqr);
772 if (rc) 816 if (rc)
773 return rc; 817 return rc;
774 device = (struct dasd_device *) cqr->device; 818 device = (struct dasd_device *) cqr->startdev;
775 if (cqr->retries < 0) { 819 if (cqr->retries < 0) {
776 DEV_MESSAGE(KERN_DEBUG, device, 820 DEV_MESSAGE(KERN_DEBUG, device,
777 "start_IO: request %p (%02x/%i) - no retry left.", 821 "start_IO: request %p (%02x/%i) - no retry left.",
778 cqr, cqr->status, cqr->retries); 822 cqr, cqr->status, cqr->retries);
779 cqr->status = DASD_CQR_FAILED; 823 cqr->status = DASD_CQR_ERROR;
780 return -EIO; 824 return -EIO;
781 } 825 }
782 cqr->startclk = get_clock(); 826 cqr->startclk = get_clock();
@@ -833,8 +877,7 @@ dasd_start_IO(struct dasd_ccw_req * cqr)
833 * The head of the ccw queue will have status DASD_CQR_IN_IO for 1), 877 * The head of the ccw queue will have status DASD_CQR_IN_IO for 1),
834 * DASD_CQR_QUEUED for 2) and 3). 878 * DASD_CQR_QUEUED for 2) and 3).
835 */ 879 */
836static void 880static void dasd_device_timeout(unsigned long ptr)
837dasd_timeout_device(unsigned long ptr)
838{ 881{
839 unsigned long flags; 882 unsigned long flags;
840 struct dasd_device *device; 883 struct dasd_device *device;
@@ -844,14 +887,13 @@ dasd_timeout_device(unsigned long ptr)
844 /* re-activate request queue */ 887 /* re-activate request queue */
845 device->stopped &= ~DASD_STOPPED_PENDING; 888 device->stopped &= ~DASD_STOPPED_PENDING;
846 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 889 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
847 dasd_schedule_bh(device); 890 dasd_schedule_device_bh(device);
848} 891}
849 892
850/* 893/*
851 * Setup timeout for a device in jiffies. 894 * Setup timeout for a device in jiffies.
852 */ 895 */
853void 896void dasd_device_set_timer(struct dasd_device *device, int expires)
854dasd_set_timer(struct dasd_device *device, int expires)
855{ 897{
856 if (expires == 0) { 898 if (expires == 0) {
857 if (timer_pending(&device->timer)) 899 if (timer_pending(&device->timer))
@@ -862,7 +904,7 @@ dasd_set_timer(struct dasd_device *device, int expires)
862 if (mod_timer(&device->timer, jiffies + expires)) 904 if (mod_timer(&device->timer, jiffies + expires))
863 return; 905 return;
864 } 906 }
865 device->timer.function = dasd_timeout_device; 907 device->timer.function = dasd_device_timeout;
866 device->timer.data = (unsigned long) device; 908 device->timer.data = (unsigned long) device;
867 device->timer.expires = jiffies + expires; 909 device->timer.expires = jiffies + expires;
868 add_timer(&device->timer); 910 add_timer(&device->timer);
@@ -871,15 +913,14 @@ dasd_set_timer(struct dasd_device *device, int expires)
871/* 913/*
872 * Clear timeout for a device. 914 * Clear timeout for a device.
873 */ 915 */
874void 916void dasd_device_clear_timer(struct dasd_device *device)
875dasd_clear_timer(struct dasd_device *device)
876{ 917{
877 if (timer_pending(&device->timer)) 918 if (timer_pending(&device->timer))
878 del_timer(&device->timer); 919 del_timer(&device->timer);
879} 920}
880 921
881static void 922static void dasd_handle_killed_request(struct ccw_device *cdev,
882dasd_handle_killed_request(struct ccw_device *cdev, unsigned long intparm) 923 unsigned long intparm)
883{ 924{
884 struct dasd_ccw_req *cqr; 925 struct dasd_ccw_req *cqr;
885 struct dasd_device *device; 926 struct dasd_device *device;
@@ -893,7 +934,7 @@ dasd_handle_killed_request(struct ccw_device *cdev, unsigned long intparm)
893 return; 934 return;
894 } 935 }
895 936
896 device = (struct dasd_device *) cqr->device; 937 device = (struct dasd_device *) cqr->startdev;
897 if (device == NULL || 938 if (device == NULL ||
898 device != dasd_device_from_cdev_locked(cdev) || 939 device != dasd_device_from_cdev_locked(cdev) ||
899 strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) { 940 strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
@@ -905,46 +946,32 @@ dasd_handle_killed_request(struct ccw_device *cdev, unsigned long intparm)
905 /* Schedule request to be retried. */ 946 /* Schedule request to be retried. */
906 cqr->status = DASD_CQR_QUEUED; 947 cqr->status = DASD_CQR_QUEUED;
907 948
908 dasd_clear_timer(device); 949 dasd_device_clear_timer(device);
909 dasd_schedule_bh(device); 950 dasd_schedule_device_bh(device);
910 dasd_put_device(device); 951 dasd_put_device(device);
911} 952}
912 953
913static void 954void dasd_generic_handle_state_change(struct dasd_device *device)
914dasd_handle_state_change_pending(struct dasd_device *device)
915{ 955{
916 struct dasd_ccw_req *cqr;
917 struct list_head *l, *n;
918
919 /* First of all start sense subsystem status request. */ 956 /* First of all start sense subsystem status request. */
920 dasd_eer_snss(device); 957 dasd_eer_snss(device);
921 958
922 device->stopped &= ~DASD_STOPPED_PENDING; 959 device->stopped &= ~DASD_STOPPED_PENDING;
923 960 dasd_schedule_device_bh(device);
924 /* restart all 'running' IO on queue */ 961 if (device->block)
925 list_for_each_safe(l, n, &device->ccw_queue) { 962 dasd_schedule_block_bh(device->block);
926 cqr = list_entry(l, struct dasd_ccw_req, list);
927 if (cqr->status == DASD_CQR_IN_IO) {
928 cqr->status = DASD_CQR_QUEUED;
929 }
930 }
931 dasd_clear_timer(device);
932 dasd_schedule_bh(device);
933} 963}
934 964
935/* 965/*
936 * Interrupt handler for "normal" ssch-io based dasd devices. 966 * Interrupt handler for "normal" ssch-io based dasd devices.
937 */ 967 */
938void 968void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
939dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, 969 struct irb *irb)
940 struct irb *irb)
941{ 970{
942 struct dasd_ccw_req *cqr, *next; 971 struct dasd_ccw_req *cqr, *next;
943 struct dasd_device *device; 972 struct dasd_device *device;
944 unsigned long long now; 973 unsigned long long now;
945 int expires; 974 int expires;
946 dasd_era_t era;
947 char mask;
948 975
949 if (IS_ERR(irb)) { 976 if (IS_ERR(irb)) {
950 switch (PTR_ERR(irb)) { 977 switch (PTR_ERR(irb)) {
@@ -969,29 +996,25 @@ dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
969 cdev->dev.bus_id, ((irb->scsw.cstat<<8)|irb->scsw.dstat), 996 cdev->dev.bus_id, ((irb->scsw.cstat<<8)|irb->scsw.dstat),
970 (unsigned int) intparm); 997 (unsigned int) intparm);
971 998
972 /* first of all check for state change pending interrupt */ 999 /* check for unsolicited interrupts */
973 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1000 cqr = (struct dasd_ccw_req *) intparm;
974 if ((irb->scsw.dstat & mask) == mask) { 1001 if (!cqr || ((irb->scsw.cc == 1) &&
1002 (irb->scsw.fctl & SCSW_FCTL_START_FUNC) &&
1003 (irb->scsw.stctl & SCSW_STCTL_STATUS_PEND)) ) {
1004 if (cqr && cqr->status == DASD_CQR_IN_IO)
1005 cqr->status = DASD_CQR_QUEUED;
975 device = dasd_device_from_cdev_locked(cdev); 1006 device = dasd_device_from_cdev_locked(cdev);
976 if (!IS_ERR(device)) { 1007 if (!IS_ERR(device)) {
977 dasd_handle_state_change_pending(device); 1008 dasd_device_clear_timer(device);
1009 device->discipline->handle_unsolicited_interrupt(device,
1010 irb);
978 dasd_put_device(device); 1011 dasd_put_device(device);
979 } 1012 }
980 return; 1013 return;
981 } 1014 }
982 1015
983 cqr = (struct dasd_ccw_req *) intparm; 1016 device = (struct dasd_device *) cqr->startdev;
984 1017 if (!device ||
985 /* check for unsolicited interrupts */
986 if (cqr == NULL) {
987 MESSAGE(KERN_DEBUG,
988 "unsolicited interrupt received: bus_id %s",
989 cdev->dev.bus_id);
990 return;
991 }
992
993 device = (struct dasd_device *) cqr->device;
994 if (device == NULL ||
995 strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) { 1018 strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
996 MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s", 1019 MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s",
997 cdev->dev.bus_id); 1020 cdev->dev.bus_id);
@@ -999,12 +1022,12 @@ dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
999 } 1022 }
1000 1023
1001 /* Check for clear pending */ 1024 /* Check for clear pending */
1002 if (cqr->status == DASD_CQR_CLEAR && 1025 if (cqr->status == DASD_CQR_CLEAR_PENDING &&
1003 irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC) { 1026 irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC) {
1004 cqr->status = DASD_CQR_QUEUED; 1027 cqr->status = DASD_CQR_CLEARED;
1005 dasd_clear_timer(device); 1028 dasd_device_clear_timer(device);
1006 wake_up(&dasd_flush_wq); 1029 wake_up(&dasd_flush_wq);
1007 dasd_schedule_bh(device); 1030 dasd_schedule_device_bh(device);
1008 return; 1031 return;
1009 } 1032 }
1010 1033
@@ -1017,272 +1040,164 @@ dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
1017 } 1040 }
1018 DBF_DEV_EVENT(DBF_DEBUG, device, "Int: CS/DS 0x%04x for cqr %p", 1041 DBF_DEV_EVENT(DBF_DEBUG, device, "Int: CS/DS 0x%04x for cqr %p",
1019 ((irb->scsw.cstat << 8) | irb->scsw.dstat), cqr); 1042 ((irb->scsw.cstat << 8) | irb->scsw.dstat), cqr);
1020 1043 next = NULL;
1021 /* Find out the appropriate era_action. */
1022 if (irb->scsw.fctl & SCSW_FCTL_HALT_FUNC)
1023 era = dasd_era_fatal;
1024 else if (irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) &&
1025 irb->scsw.cstat == 0 &&
1026 !irb->esw.esw0.erw.cons)
1027 era = dasd_era_none;
1028 else if (irb->esw.esw0.erw.cons)
1029 era = device->discipline->examine_error(cqr, irb);
1030 else
1031 era = dasd_era_recover;
1032
1033 DBF_DEV_EVENT(DBF_DEBUG, device, "era_code %d", era);
1034 expires = 0; 1044 expires = 0;
1035 if (era == dasd_era_none) { 1045 if (irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) &&
1036 cqr->status = DASD_CQR_DONE; 1046 irb->scsw.cstat == 0 && !irb->esw.esw0.erw.cons) {
1047 /* request was completed successfully */
1048 cqr->status = DASD_CQR_SUCCESS;
1037 cqr->stopclk = now; 1049 cqr->stopclk = now;
1038 /* Start first request on queue if possible -> fast_io. */ 1050 /* Start first request on queue if possible -> fast_io. */
1039 if (cqr->list.next != &device->ccw_queue) { 1051 if (cqr->devlist.next != &device->ccw_queue) {
1040 next = list_entry(cqr->list.next, 1052 next = list_entry(cqr->devlist.next,
1041 struct dasd_ccw_req, list); 1053 struct dasd_ccw_req, devlist);
1042 if ((next->status == DASD_CQR_QUEUED) &&
1043 (!device->stopped)) {
1044 if (device->discipline->start_IO(next) == 0)
1045 expires = next->expires;
1046 else
1047 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1048 "Interrupt fastpath "
1049 "failed!");
1050 }
1051 } 1054 }
1052 } else { /* error */ 1055 } else { /* error */
1053 memcpy(&cqr->irb, irb, sizeof (struct irb)); 1056 memcpy(&cqr->irb, irb, sizeof(struct irb));
1054 if (device->features & DASD_FEATURE_ERPLOG) { 1057 if (device->features & DASD_FEATURE_ERPLOG) {
1055 /* dump sense data */
1056 dasd_log_sense(cqr, irb); 1058 dasd_log_sense(cqr, irb);
1057 } 1059 }
1058 switch (era) { 1060 /* If we have no sense data, or we just don't want complex ERP
1059 case dasd_era_fatal: 1061 * for this request, but if we have retries left, then just
1060 cqr->status = DASD_CQR_FAILED; 1062 * reset this request and retry it in the fastpath
1061 cqr->stopclk = now; 1063 */
1062 break; 1064 if (!(cqr->irb.esw.esw0.erw.cons &&
1063 case dasd_era_recover: 1065 test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags)) &&
1066 cqr->retries > 0) {
1067 DEV_MESSAGE(KERN_DEBUG, device,
1068 "default ERP in fastpath (%i retries left)",
1069 cqr->retries);
1070 cqr->lpm = LPM_ANYPATH;
1071 cqr->status = DASD_CQR_QUEUED;
1072 next = cqr;
1073 } else
1064 cqr->status = DASD_CQR_ERROR; 1074 cqr->status = DASD_CQR_ERROR;
1065 break; 1075 }
1066 default: 1076 if (next && (next->status == DASD_CQR_QUEUED) &&
1067 BUG(); 1077 (!device->stopped)) {
1068 } 1078 if (device->discipline->start_IO(next) == 0)
1079 expires = next->expires;
1080 else
1081 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1082 "Interrupt fastpath "
1083 "failed!");
1069 } 1084 }
1070 if (expires != 0) 1085 if (expires != 0)
1071 dasd_set_timer(device, expires); 1086 dasd_device_set_timer(device, expires);
1072 else 1087 else
1073 dasd_clear_timer(device); 1088 dasd_device_clear_timer(device);
1074 dasd_schedule_bh(device); 1089 dasd_schedule_device_bh(device);
1075} 1090}
1076 1091
1077/* 1092/*
1078 * posts the buffer_cache about a finalized request 1093 * If we have an error on a dasd_block layer request then we cancel
1094 * and return all further requests from the same dasd_block as well.
1079 */ 1095 */
1080static inline void 1096static void __dasd_device_recovery(struct dasd_device *device,
1081dasd_end_request(struct request *req, int uptodate) 1097 struct dasd_ccw_req *ref_cqr)
1082{ 1098{
1083 if (end_that_request_first(req, uptodate, req->hard_nr_sectors)) 1099 struct list_head *l, *n;
1084 BUG(); 1100 struct dasd_ccw_req *cqr;
1085 add_disk_randomness(req->rq_disk);
1086 end_that_request_last(req, uptodate);
1087}
1088 1101
1089/* 1102 /*
1090 * Process finished error recovery ccw. 1103 * only requeue request that came from the dasd_block layer
1091 */ 1104 */
1092static inline void 1105 if (!ref_cqr->block)
1093__dasd_process_erp(struct dasd_device *device, struct dasd_ccw_req *cqr) 1106 return;
1094{
1095 dasd_erp_fn_t erp_fn;
1096 1107
1097 if (cqr->status == DASD_CQR_DONE) 1108 list_for_each_safe(l, n, &device->ccw_queue) {
1098 DBF_DEV_EVENT(DBF_NOTICE, device, "%s", "ERP successful"); 1109 cqr = list_entry(l, struct dasd_ccw_req, devlist);
1099 else 1110 if (cqr->status == DASD_CQR_QUEUED &&
1100 DEV_MESSAGE(KERN_ERR, device, "%s", "ERP unsuccessful"); 1111 ref_cqr->block == cqr->block) {
1101 erp_fn = device->discipline->erp_postaction(cqr); 1112 cqr->status = DASD_CQR_CLEARED;
1102 erp_fn(cqr); 1113 }
1103} 1114 }
1115};
1104 1116
1105/* 1117/*
1106 * Process ccw request queue. 1118 * Remove those ccw requests from the queue that need to be returned
1119 * to the upper layer.
1107 */ 1120 */
1108static void 1121static void __dasd_device_process_ccw_queue(struct dasd_device *device,
1109__dasd_process_ccw_queue(struct dasd_device * device, 1122 struct list_head *final_queue)
1110 struct list_head *final_queue)
1111{ 1123{
1112 struct list_head *l, *n; 1124 struct list_head *l, *n;
1113 struct dasd_ccw_req *cqr; 1125 struct dasd_ccw_req *cqr;
1114 dasd_erp_fn_t erp_fn;
1115 1126
1116restart:
1117 /* Process request with final status. */ 1127 /* Process request with final status. */
1118 list_for_each_safe(l, n, &device->ccw_queue) { 1128 list_for_each_safe(l, n, &device->ccw_queue) {
1119 cqr = list_entry(l, struct dasd_ccw_req, list); 1129 cqr = list_entry(l, struct dasd_ccw_req, devlist);
1130
1120 /* Stop list processing at the first non-final request. */ 1131 /* Stop list processing at the first non-final request. */
1121 if (cqr->status != DASD_CQR_DONE && 1132 if (cqr->status == DASD_CQR_QUEUED ||
1122 cqr->status != DASD_CQR_FAILED && 1133 cqr->status == DASD_CQR_IN_IO ||
1123 cqr->status != DASD_CQR_ERROR) 1134 cqr->status == DASD_CQR_CLEAR_PENDING)
1124 break; 1135 break;
1125 /* Process requests with DASD_CQR_ERROR */
1126 if (cqr->status == DASD_CQR_ERROR) { 1136 if (cqr->status == DASD_CQR_ERROR) {
1127 if (cqr->irb.scsw.fctl & SCSW_FCTL_HALT_FUNC) { 1137 __dasd_device_recovery(device, cqr);
1128 cqr->status = DASD_CQR_FAILED;
1129 cqr->stopclk = get_clock();
1130 } else {
1131 if (cqr->irb.esw.esw0.erw.cons &&
1132 test_bit(DASD_CQR_FLAGS_USE_ERP,
1133 &cqr->flags)) {
1134 erp_fn = device->discipline->
1135 erp_action(cqr);
1136 erp_fn(cqr);
1137 } else
1138 dasd_default_erp_action(cqr);
1139 }
1140 goto restart;
1141 }
1142
1143 /* First of all call extended error reporting. */
1144 if (dasd_eer_enabled(device) &&
1145 cqr->status == DASD_CQR_FAILED) {
1146 dasd_eer_write(device, cqr, DASD_EER_FATALERROR);
1147
1148 /* restart request */
1149 cqr->status = DASD_CQR_QUEUED;
1150 cqr->retries = 255;
1151 device->stopped |= DASD_STOPPED_QUIESCE;
1152 goto restart;
1153 } 1138 }
1154
1155 /* Process finished ERP request. */
1156 if (cqr->refers) {
1157 __dasd_process_erp(device, cqr);
1158 goto restart;
1159 }
1160
1161 /* Rechain finished requests to final queue */ 1139 /* Rechain finished requests to final queue */
1162 cqr->endclk = get_clock(); 1140 list_move_tail(&cqr->devlist, final_queue);
1163 list_move_tail(&cqr->list, final_queue);
1164 } 1141 }
1165} 1142}
1166 1143
1167static void
1168dasd_end_request_cb(struct dasd_ccw_req * cqr, void *data)
1169{
1170 struct request *req;
1171 struct dasd_device *device;
1172 int status;
1173
1174 req = (struct request *) data;
1175 device = cqr->device;
1176 dasd_profile_end(device, cqr, req);
1177 status = cqr->device->discipline->free_cp(cqr,req);
1178 spin_lock_irq(&device->request_queue_lock);
1179 dasd_end_request(req, status);
1180 spin_unlock_irq(&device->request_queue_lock);
1181}
1182
1183
1184/* 1144/*
1185 * Fetch requests from the block device queue. 1145 * the cqrs from the final queue are returned to the upper layer
1146 * by setting a dasd_block state and calling the callback function
1186 */ 1147 */
1187static void 1148static void __dasd_device_process_final_queue(struct dasd_device *device,
1188__dasd_process_blk_queue(struct dasd_device * device) 1149 struct list_head *final_queue)
1189{ 1150{
1190 struct request_queue *queue; 1151 struct list_head *l, *n;
1191 struct request *req;
1192 struct dasd_ccw_req *cqr; 1152 struct dasd_ccw_req *cqr;
1193 int nr_queued;
1194
1195 queue = device->request_queue;
1196 /* No queue ? Then there is nothing to do. */
1197 if (queue == NULL)
1198 return;
1199
1200 /*
1201 * We requeue request from the block device queue to the ccw
1202 * queue only in two states. In state DASD_STATE_READY the
1203 * partition detection is done and we need to requeue requests
1204 * for that. State DASD_STATE_ONLINE is normal block device
1205 * operation.
1206 */
1207 if (device->state != DASD_STATE_READY &&
1208 device->state != DASD_STATE_ONLINE)
1209 return;
1210 nr_queued = 0;
1211 /* Now we try to fetch requests from the request queue */
1212 list_for_each_entry(cqr, &device->ccw_queue, list)
1213 if (cqr->status == DASD_CQR_QUEUED)
1214 nr_queued++;
1215 while (!blk_queue_plugged(queue) &&
1216 elv_next_request(queue) &&
1217 nr_queued < DASD_CHANQ_MAX_SIZE) {
1218 req = elv_next_request(queue);
1219 1153
1220 if (device->features & DASD_FEATURE_READONLY && 1154 list_for_each_safe(l, n, final_queue) {
1221 rq_data_dir(req) == WRITE) { 1155 cqr = list_entry(l, struct dasd_ccw_req, devlist);
1222 DBF_DEV_EVENT(DBF_ERR, device, 1156 list_del_init(&cqr->devlist);
1223 "Rejecting write request %p", 1157 if (cqr->block)
1224 req); 1158 spin_lock_bh(&cqr->block->queue_lock);
1225 blkdev_dequeue_request(req); 1159 switch (cqr->status) {
1226 dasd_end_request(req, 0); 1160 case DASD_CQR_SUCCESS:
1227 continue; 1161 cqr->status = DASD_CQR_DONE;
1228 } 1162 break;
1229 if (device->stopped & DASD_STOPPED_DC_EIO) { 1163 case DASD_CQR_ERROR:
1230 blkdev_dequeue_request(req); 1164 cqr->status = DASD_CQR_NEED_ERP;
1231 dasd_end_request(req, 0); 1165 break;
1232 continue; 1166 case DASD_CQR_CLEARED:
1233 } 1167 cqr->status = DASD_CQR_TERMINATED;
1234 cqr = device->discipline->build_cp(device, req); 1168 break;
1235 if (IS_ERR(cqr)) { 1169 default:
1236 if (PTR_ERR(cqr) == -ENOMEM) 1170 DEV_MESSAGE(KERN_ERR, device,
1237 break; /* terminate request queue loop */ 1171 "wrong cqr status in __dasd_process_final_queue "
1238 if (PTR_ERR(cqr) == -EAGAIN) { 1172 "for cqr %p, status %x",
1239 /* 1173 cqr, cqr->status);
1240 * The current request cannot be build right 1174 BUG();
1241 * now, we have to try later. If this request
1242 * is the head-of-queue we stop the device
1243 * for 1/2 second.
1244 */
1245 if (!list_empty(&device->ccw_queue))
1246 break;
1247 device->stopped |= DASD_STOPPED_PENDING;
1248 dasd_set_timer(device, HZ/2);
1249 break;
1250 }
1251 DBF_DEV_EVENT(DBF_ERR, device,
1252 "CCW creation failed (rc=%ld) "
1253 "on request %p",
1254 PTR_ERR(cqr), req);
1255 blkdev_dequeue_request(req);
1256 dasd_end_request(req, 0);
1257 continue;
1258 } 1175 }
1259 cqr->callback = dasd_end_request_cb; 1176 if (cqr->block)
1260 cqr->callback_data = (void *) req; 1177 spin_unlock_bh(&cqr->block->queue_lock);
1261 cqr->status = DASD_CQR_QUEUED; 1178 if (cqr->callback != NULL)
1262 blkdev_dequeue_request(req); 1179 (cqr->callback)(cqr, cqr->callback_data);
1263 list_add_tail(&cqr->list, &device->ccw_queue);
1264 dasd_profile_start(device, cqr, req);
1265 nr_queued++;
1266 } 1180 }
1267} 1181}
1268 1182
1183
1184
1269/* 1185/*
1270 * Take a look at the first request on the ccw queue and check 1186 * Take a look at the first request on the ccw queue and check
1271 * if it reached its expire time. If so, terminate the IO. 1187 * if it reached its expire time. If so, terminate the IO.
1272 */ 1188 */
1273static void 1189static void __dasd_device_check_expire(struct dasd_device *device)
1274__dasd_check_expire(struct dasd_device * device)
1275{ 1190{
1276 struct dasd_ccw_req *cqr; 1191 struct dasd_ccw_req *cqr;
1277 1192
1278 if (list_empty(&device->ccw_queue)) 1193 if (list_empty(&device->ccw_queue))
1279 return; 1194 return;
1280 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list); 1195 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist);
1281 if ((cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) && 1196 if ((cqr->status == DASD_CQR_IN_IO && cqr->expires != 0) &&
1282 (time_after_eq(jiffies, cqr->expires + cqr->starttime))) { 1197 (time_after_eq(jiffies, cqr->expires + cqr->starttime))) {
1283 if (device->discipline->term_IO(cqr) != 0) { 1198 if (device->discipline->term_IO(cqr) != 0) {
1284 /* Hmpf, try again in 5 sec */ 1199 /* Hmpf, try again in 5 sec */
1285 dasd_set_timer(device, 5*HZ); 1200 dasd_device_set_timer(device, 5*HZ);
1286 DEV_MESSAGE(KERN_ERR, device, 1201 DEV_MESSAGE(KERN_ERR, device,
1287 "internal error - timeout (%is) expired " 1202 "internal error - timeout (%is) expired "
1288 "for cqr %p, termination failed, " 1203 "for cqr %p, termination failed, "
@@ -1301,77 +1216,53 @@ __dasd_check_expire(struct dasd_device * device)
1301 * Take a look at the first request on the ccw queue and check 1216 * Take a look at the first request on the ccw queue and check
1302 * if it needs to be started. 1217 * if it needs to be started.
1303 */ 1218 */
1304static void 1219static void __dasd_device_start_head(struct dasd_device *device)
1305__dasd_start_head(struct dasd_device * device)
1306{ 1220{
1307 struct dasd_ccw_req *cqr; 1221 struct dasd_ccw_req *cqr;
1308 int rc; 1222 int rc;
1309 1223
1310 if (list_empty(&device->ccw_queue)) 1224 if (list_empty(&device->ccw_queue))
1311 return; 1225 return;
1312 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list); 1226 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist);
1313 if (cqr->status != DASD_CQR_QUEUED) 1227 if (cqr->status != DASD_CQR_QUEUED)
1314 return; 1228 return;
1315 /* Non-temporary stop condition will trigger fail fast */ 1229 /* when device is stopped, return request to previous layer */
1316 if (device->stopped & ~DASD_STOPPED_PENDING && 1230 if (device->stopped) {
1317 test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) && 1231 cqr->status = DASD_CQR_CLEARED;
1318 (!dasd_eer_enabled(device))) { 1232 dasd_schedule_device_bh(device);
1319 cqr->status = DASD_CQR_FAILED;
1320 dasd_schedule_bh(device);
1321 return; 1233 return;
1322 } 1234 }
1323 /* Don't try to start requests if device is stopped */
1324 if (device->stopped)
1325 return;
1326 1235
1327 rc = device->discipline->start_IO(cqr); 1236 rc = device->discipline->start_IO(cqr);
1328 if (rc == 0) 1237 if (rc == 0)
1329 dasd_set_timer(device, cqr->expires); 1238 dasd_device_set_timer(device, cqr->expires);
1330 else if (rc == -EACCES) { 1239 else if (rc == -EACCES) {
1331 dasd_schedule_bh(device); 1240 dasd_schedule_device_bh(device);
1332 } else 1241 } else
1333 /* Hmpf, try again in 1/2 sec */ 1242 /* Hmpf, try again in 1/2 sec */
1334 dasd_set_timer(device, 50); 1243 dasd_device_set_timer(device, 50);
1335}
1336
1337static inline int
1338_wait_for_clear(struct dasd_ccw_req *cqr)
1339{
1340 return (cqr->status == DASD_CQR_QUEUED);
1341} 1244}
1342 1245
1343/* 1246/*
1344 * Remove all requests from the ccw queue (all = '1') or only block device 1247 * Go through all request on the dasd_device request queue,
1345 * requests in case all = '0'. 1248 * terminate them on the cdev if necessary, and return them to the
1346 * Take care of the erp-chain (chained via cqr->refers) and remove either 1249 * submitting layer via callback.
1347 * the whole erp-chain or none of the erp-requests. 1250 * Note:
1348 * If a request is currently running, term_IO is called and the request 1251 * Make sure that all 'submitting layers' still exist when
1349 * is re-queued. Prior to removing the terminated request we need to wait 1252 * this function is called!. In other words, when 'device' is a base
1350 * for the clear-interrupt. 1253 * device then all block layer requests must have been removed before
1351 * In case termination is not possible we stop processing and just finishing 1254 * via dasd_flush_block_queue.
1352 * the already moved requests.
1353 */ 1255 */
1354static int 1256int dasd_flush_device_queue(struct dasd_device *device)
1355dasd_flush_ccw_queue(struct dasd_device * device, int all)
1356{ 1257{
1357 struct dasd_ccw_req *cqr, *orig, *n; 1258 struct dasd_ccw_req *cqr, *n;
1358 int rc, i; 1259 int rc;
1359
1360 struct list_head flush_queue; 1260 struct list_head flush_queue;
1361 1261
1362 INIT_LIST_HEAD(&flush_queue); 1262 INIT_LIST_HEAD(&flush_queue);
1363 spin_lock_irq(get_ccwdev_lock(device->cdev)); 1263 spin_lock_irq(get_ccwdev_lock(device->cdev));
1364 rc = 0; 1264 rc = 0;
1365restart: 1265 list_for_each_entry_safe(cqr, n, &device->ccw_queue, devlist) {
1366 list_for_each_entry_safe(cqr, n, &device->ccw_queue, list) {
1367 /* get original request of erp request-chain */
1368 for (orig = cqr; orig->refers != NULL; orig = orig->refers);
1369
1370 /* Flush all request or only block device requests? */
1371 if (all == 0 && cqr->callback != dasd_end_request_cb &&
1372 orig->callback != dasd_end_request_cb) {
1373 continue;
1374 }
1375 /* Check status and move request to flush_queue */ 1266 /* Check status and move request to flush_queue */
1376 switch (cqr->status) { 1267 switch (cqr->status) {
1377 case DASD_CQR_IN_IO: 1268 case DASD_CQR_IN_IO:
@@ -1387,90 +1278,60 @@ restart:
1387 } 1278 }
1388 break; 1279 break;
1389 case DASD_CQR_QUEUED: 1280 case DASD_CQR_QUEUED:
1390 case DASD_CQR_ERROR:
1391 /* set request to FAILED */
1392 cqr->stopclk = get_clock(); 1281 cqr->stopclk = get_clock();
1393 cqr->status = DASD_CQR_FAILED; 1282 cqr->status = DASD_CQR_CLEARED;
1394 break; 1283 break;
1395 default: /* do not touch the others */ 1284 default: /* no need to modify the others */
1396 break; 1285 break;
1397 } 1286 }
1398 /* Rechain request (including erp chain) */ 1287 list_move_tail(&cqr->devlist, &flush_queue);
1399 for (i = 0; cqr != NULL; cqr = cqr->refers, i++) {
1400 cqr->endclk = get_clock();
1401 list_move_tail(&cqr->list, &flush_queue);
1402 }
1403 if (i > 1)
1404 /* moved more than one request - need to restart */
1405 goto restart;
1406 } 1288 }
1407
1408finished: 1289finished:
1409 spin_unlock_irq(get_ccwdev_lock(device->cdev)); 1290 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1410 /* Now call the callback function of flushed requests */ 1291 /*
1411restart_cb: 1292 * After this point all requests must be in state CLEAR_PENDING,
1412 list_for_each_entry_safe(cqr, n, &flush_queue, list) { 1293 * CLEARED, SUCCESS or ERROR. Now wait for CLEAR_PENDING to become
1413 if (cqr->status == DASD_CQR_CLEAR) { 1294 * one of the others.
1414 /* wait for clear interrupt! */ 1295 */
1415 wait_event(dasd_flush_wq, _wait_for_clear(cqr)); 1296 list_for_each_entry_safe(cqr, n, &flush_queue, devlist)
1416 cqr->status = DASD_CQR_FAILED; 1297 wait_event(dasd_flush_wq,
1417 } 1298 (cqr->status != DASD_CQR_CLEAR_PENDING));
1418 /* Process finished ERP request. */ 1299 /*
1419 if (cqr->refers) { 1300 * Now set each request back to TERMINATED, DONE or NEED_ERP
1420 __dasd_process_erp(device, cqr); 1301 * and call the callback function of flushed requests
1421 /* restart list_for_xx loop since dasd_process_erp 1302 */
1422 * might remove multiple elements */ 1303 __dasd_device_process_final_queue(device, &flush_queue);
1423 goto restart_cb;
1424 }
1425 /* call the callback function */
1426 cqr->endclk = get_clock();
1427 if (cqr->callback != NULL)
1428 (cqr->callback)(cqr, cqr->callback_data);
1429 }
1430 return rc; 1304 return rc;
1431} 1305}
1432 1306
1433/* 1307/*
1434 * Acquire the device lock and process queues for the device. 1308 * Acquire the device lock and process queues for the device.
1435 */ 1309 */
1436static void 1310static void dasd_device_tasklet(struct dasd_device *device)
1437dasd_tasklet(struct dasd_device * device)
1438{ 1311{
1439 struct list_head final_queue; 1312 struct list_head final_queue;
1440 struct list_head *l, *n;
1441 struct dasd_ccw_req *cqr;
1442 1313
1443 atomic_set (&device->tasklet_scheduled, 0); 1314 atomic_set (&device->tasklet_scheduled, 0);
1444 INIT_LIST_HEAD(&final_queue); 1315 INIT_LIST_HEAD(&final_queue);
1445 spin_lock_irq(get_ccwdev_lock(device->cdev)); 1316 spin_lock_irq(get_ccwdev_lock(device->cdev));
1446 /* Check expire time of first request on the ccw queue. */ 1317 /* Check expire time of first request on the ccw queue. */
1447 __dasd_check_expire(device); 1318 __dasd_device_check_expire(device);
1448 /* Finish off requests on ccw queue */ 1319 /* find final requests on ccw queue */
1449 __dasd_process_ccw_queue(device, &final_queue); 1320 __dasd_device_process_ccw_queue(device, &final_queue);
1450 spin_unlock_irq(get_ccwdev_lock(device->cdev)); 1321 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1451 /* Now call the callback function of requests with final status */ 1322 /* Now call the callback function of requests with final status */
1452 list_for_each_safe(l, n, &final_queue) { 1323 __dasd_device_process_final_queue(device, &final_queue);
1453 cqr = list_entry(l, struct dasd_ccw_req, list); 1324 spin_lock_irq(get_ccwdev_lock(device->cdev));
1454 list_del_init(&cqr->list);
1455 if (cqr->callback != NULL)
1456 (cqr->callback)(cqr, cqr->callback_data);
1457 }
1458 spin_lock_irq(&device->request_queue_lock);
1459 spin_lock(get_ccwdev_lock(device->cdev));
1460 /* Get new request from the block device request queue */
1461 __dasd_process_blk_queue(device);
1462 /* Now check if the head of the ccw queue needs to be started. */ 1325 /* Now check if the head of the ccw queue needs to be started. */
1463 __dasd_start_head(device); 1326 __dasd_device_start_head(device);
1464 spin_unlock(get_ccwdev_lock(device->cdev)); 1327 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1465 spin_unlock_irq(&device->request_queue_lock);
1466 dasd_put_device(device); 1328 dasd_put_device(device);
1467} 1329}
1468 1330
1469/* 1331/*
1470 * Schedules a call to dasd_tasklet over the device tasklet. 1332 * Schedules a call to dasd_tasklet over the device tasklet.
1471 */ 1333 */
1472void 1334void dasd_schedule_device_bh(struct dasd_device *device)
1473dasd_schedule_bh(struct dasd_device * device)
1474{ 1335{
1475 /* Protect against rescheduling. */ 1336 /* Protect against rescheduling. */
1476 if (atomic_cmpxchg (&device->tasklet_scheduled, 0, 1) != 0) 1337 if (atomic_cmpxchg (&device->tasklet_scheduled, 0, 1) != 0)
@@ -1480,160 +1341,109 @@ dasd_schedule_bh(struct dasd_device * device)
1480} 1341}
1481 1342
1482/* 1343/*
1483 * Queue a request to the head of the ccw_queue. Start the I/O if 1344 * Queue a request to the head of the device ccw_queue.
1484 * possible. 1345 * Start the I/O if possible.
1485 */ 1346 */
1486void 1347void dasd_add_request_head(struct dasd_ccw_req *cqr)
1487dasd_add_request_head(struct dasd_ccw_req *req)
1488{ 1348{
1489 struct dasd_device *device; 1349 struct dasd_device *device;
1490 unsigned long flags; 1350 unsigned long flags;
1491 1351
1492 device = req->device; 1352 device = cqr->startdev;
1493 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1353 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1494 req->status = DASD_CQR_QUEUED; 1354 cqr->status = DASD_CQR_QUEUED;
1495 req->device = device; 1355 list_add(&cqr->devlist, &device->ccw_queue);
1496 list_add(&req->list, &device->ccw_queue);
1497 /* let the bh start the request to keep them in order */ 1356 /* let the bh start the request to keep them in order */
1498 dasd_schedule_bh(device); 1357 dasd_schedule_device_bh(device);
1499 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1358 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1500} 1359}
1501 1360
1502/* 1361/*
1503 * Queue a request to the tail of the ccw_queue. Start the I/O if 1362 * Queue a request to the tail of the device ccw_queue.
1504 * possible. 1363 * Start the I/O if possible.
1505 */ 1364 */
1506void 1365void dasd_add_request_tail(struct dasd_ccw_req *cqr)
1507dasd_add_request_tail(struct dasd_ccw_req *req)
1508{ 1366{
1509 struct dasd_device *device; 1367 struct dasd_device *device;
1510 unsigned long flags; 1368 unsigned long flags;
1511 1369
1512 device = req->device; 1370 device = cqr->startdev;
1513 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1371 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1514 req->status = DASD_CQR_QUEUED; 1372 cqr->status = DASD_CQR_QUEUED;
1515 req->device = device; 1373 list_add_tail(&cqr->devlist, &device->ccw_queue);
1516 list_add_tail(&req->list, &device->ccw_queue);
1517 /* let the bh start the request to keep them in order */ 1374 /* let the bh start the request to keep them in order */
1518 dasd_schedule_bh(device); 1375 dasd_schedule_device_bh(device);
1519 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1376 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1520} 1377}
1521 1378
1522/* 1379/*
1523 * Wakeup callback. 1380 * Wakeup helper for the 'sleep_on' functions.
1524 */ 1381 */
1525static void 1382static void dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data)
1526dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data)
1527{ 1383{
1528 wake_up((wait_queue_head_t *) data); 1384 wake_up((wait_queue_head_t *) data);
1529} 1385}
1530 1386
1531static inline int 1387static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr)
1532_wait_for_wakeup(struct dasd_ccw_req *cqr)
1533{ 1388{
1534 struct dasd_device *device; 1389 struct dasd_device *device;
1535 int rc; 1390 int rc;
1536 1391
1537 device = cqr->device; 1392 device = cqr->startdev;
1538 spin_lock_irq(get_ccwdev_lock(device->cdev)); 1393 spin_lock_irq(get_ccwdev_lock(device->cdev));
1539 rc = ((cqr->status == DASD_CQR_DONE || 1394 rc = ((cqr->status == DASD_CQR_DONE ||
1540 cqr->status == DASD_CQR_FAILED) && 1395 cqr->status == DASD_CQR_NEED_ERP ||
1541 list_empty(&cqr->list)); 1396 cqr->status == DASD_CQR_TERMINATED) &&
1397 list_empty(&cqr->devlist));
1542 spin_unlock_irq(get_ccwdev_lock(device->cdev)); 1398 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1543 return rc; 1399 return rc;
1544} 1400}
1545 1401
1546/* 1402/*
1547 * Attempts to start a special ccw queue and waits for its completion. 1403 * Queue a request to the tail of the device ccw_queue and wait for
1404 * it's completion.
1548 */ 1405 */
1549int 1406int dasd_sleep_on(struct dasd_ccw_req *cqr)
1550dasd_sleep_on(struct dasd_ccw_req * cqr)
1551{ 1407{
1552 wait_queue_head_t wait_q; 1408 wait_queue_head_t wait_q;
1553 struct dasd_device *device; 1409 struct dasd_device *device;
1554 int rc; 1410 int rc;
1555 1411
1556 device = cqr->device; 1412 device = cqr->startdev;
1557 spin_lock_irq(get_ccwdev_lock(device->cdev));
1558 1413
1559 init_waitqueue_head (&wait_q); 1414 init_waitqueue_head (&wait_q);
1560 cqr->callback = dasd_wakeup_cb; 1415 cqr->callback = dasd_wakeup_cb;
1561 cqr->callback_data = (void *) &wait_q; 1416 cqr->callback_data = (void *) &wait_q;
1562 cqr->status = DASD_CQR_QUEUED; 1417 dasd_add_request_tail(cqr);
1563 list_add_tail(&cqr->list, &device->ccw_queue);
1564
1565 /* let the bh start the request to keep them in order */
1566 dasd_schedule_bh(device);
1567
1568 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1569
1570 wait_event(wait_q, _wait_for_wakeup(cqr)); 1418 wait_event(wait_q, _wait_for_wakeup(cqr));
1571 1419
1572 /* Request status is either done or failed. */ 1420 /* Request status is either done or failed. */
1573 rc = (cqr->status == DASD_CQR_FAILED) ? -EIO : 0; 1421 rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
1574 return rc; 1422 return rc;
1575} 1423}
1576 1424
1577/* 1425/*
1578 * Attempts to start a special ccw queue and wait interruptible 1426 * Queue a request to the tail of the device ccw_queue and wait
1579 * for its completion. 1427 * interruptible for it's completion.
1580 */ 1428 */
1581int 1429int dasd_sleep_on_interruptible(struct dasd_ccw_req *cqr)
1582dasd_sleep_on_interruptible(struct dasd_ccw_req * cqr)
1583{ 1430{
1584 wait_queue_head_t wait_q; 1431 wait_queue_head_t wait_q;
1585 struct dasd_device *device; 1432 struct dasd_device *device;
1586 int rc, finished; 1433 int rc;
1587
1588 device = cqr->device;
1589 spin_lock_irq(get_ccwdev_lock(device->cdev));
1590 1434
1435 device = cqr->startdev;
1591 init_waitqueue_head (&wait_q); 1436 init_waitqueue_head (&wait_q);
1592 cqr->callback = dasd_wakeup_cb; 1437 cqr->callback = dasd_wakeup_cb;
1593 cqr->callback_data = (void *) &wait_q; 1438 cqr->callback_data = (void *) &wait_q;
1594 cqr->status = DASD_CQR_QUEUED; 1439 dasd_add_request_tail(cqr);
1595 list_add_tail(&cqr->list, &device->ccw_queue); 1440 rc = wait_event_interruptible(wait_q, _wait_for_wakeup(cqr));
1596 1441 if (rc == -ERESTARTSYS) {
1597 /* let the bh start the request to keep them in order */ 1442 dasd_cancel_req(cqr);
1598 dasd_schedule_bh(device); 1443 /* wait (non-interruptible) for final status */
1599 spin_unlock_irq(get_ccwdev_lock(device->cdev)); 1444 wait_event(wait_q, _wait_for_wakeup(cqr));
1600
1601 finished = 0;
1602 while (!finished) {
1603 rc = wait_event_interruptible(wait_q, _wait_for_wakeup(cqr));
1604 if (rc != -ERESTARTSYS) {
1605 /* Request is final (done or failed) */
1606 rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
1607 break;
1608 }
1609 spin_lock_irq(get_ccwdev_lock(device->cdev));
1610 switch (cqr->status) {
1611 case DASD_CQR_IN_IO:
1612 /* terminate runnig cqr */
1613 if (device->discipline->term_IO) {
1614 cqr->retries = -1;
1615 device->discipline->term_IO(cqr);
1616 /* wait (non-interruptible) for final status
1617 * because signal ist still pending */
1618 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1619 wait_event(wait_q, _wait_for_wakeup(cqr));
1620 spin_lock_irq(get_ccwdev_lock(device->cdev));
1621 rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
1622 finished = 1;
1623 }
1624 break;
1625 case DASD_CQR_QUEUED:
1626 /* request */
1627 list_del_init(&cqr->list);
1628 rc = -EIO;
1629 finished = 1;
1630 break;
1631 default:
1632 /* cqr with 'non-interruptable' status - just wait */
1633 break;
1634 }
1635 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1636 } 1445 }
1446 rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
1637 return rc; 1447 return rc;
1638} 1448}
1639 1449
@@ -1643,25 +1453,23 @@ dasd_sleep_on_interruptible(struct dasd_ccw_req * cqr)
1643 * and be put back to status queued, before the special request is added 1453 * and be put back to status queued, before the special request is added
1644 * to the head of the queue. Then the special request is waited on normally. 1454 * to the head of the queue. Then the special request is waited on normally.
1645 */ 1455 */
1646static inline int 1456static inline int _dasd_term_running_cqr(struct dasd_device *device)
1647_dasd_term_running_cqr(struct dasd_device *device)
1648{ 1457{
1649 struct dasd_ccw_req *cqr; 1458 struct dasd_ccw_req *cqr;
1650 1459
1651 if (list_empty(&device->ccw_queue)) 1460 if (list_empty(&device->ccw_queue))
1652 return 0; 1461 return 0;
1653 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, list); 1462 cqr = list_entry(device->ccw_queue.next, struct dasd_ccw_req, devlist);
1654 return device->discipline->term_IO(cqr); 1463 return device->discipline->term_IO(cqr);
1655} 1464}
1656 1465
1657int 1466int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
1658dasd_sleep_on_immediatly(struct dasd_ccw_req * cqr)
1659{ 1467{
1660 wait_queue_head_t wait_q; 1468 wait_queue_head_t wait_q;
1661 struct dasd_device *device; 1469 struct dasd_device *device;
1662 int rc; 1470 int rc;
1663 1471
1664 device = cqr->device; 1472 device = cqr->startdev;
1665 spin_lock_irq(get_ccwdev_lock(device->cdev)); 1473 spin_lock_irq(get_ccwdev_lock(device->cdev));
1666 rc = _dasd_term_running_cqr(device); 1474 rc = _dasd_term_running_cqr(device);
1667 if (rc) { 1475 if (rc) {
@@ -1673,17 +1481,17 @@ dasd_sleep_on_immediatly(struct dasd_ccw_req * cqr)
1673 cqr->callback = dasd_wakeup_cb; 1481 cqr->callback = dasd_wakeup_cb;
1674 cqr->callback_data = (void *) &wait_q; 1482 cqr->callback_data = (void *) &wait_q;
1675 cqr->status = DASD_CQR_QUEUED; 1483 cqr->status = DASD_CQR_QUEUED;
1676 list_add(&cqr->list, &device->ccw_queue); 1484 list_add(&cqr->devlist, &device->ccw_queue);
1677 1485
1678 /* let the bh start the request to keep them in order */ 1486 /* let the bh start the request to keep them in order */
1679 dasd_schedule_bh(device); 1487 dasd_schedule_device_bh(device);
1680 1488
1681 spin_unlock_irq(get_ccwdev_lock(device->cdev)); 1489 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1682 1490
1683 wait_event(wait_q, _wait_for_wakeup(cqr)); 1491 wait_event(wait_q, _wait_for_wakeup(cqr));
1684 1492
1685 /* Request status is either done or failed. */ 1493 /* Request status is either done or failed. */
1686 rc = (cqr->status == DASD_CQR_FAILED) ? -EIO : 0; 1494 rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
1687 return rc; 1495 return rc;
1688} 1496}
1689 1497
@@ -1692,11 +1500,14 @@ dasd_sleep_on_immediatly(struct dasd_ccw_req * cqr)
1692 * This is useful to timeout requests. The request will be 1500 * This is useful to timeout requests. The request will be
1693 * terminated if it is currently in i/o. 1501 * terminated if it is currently in i/o.
1694 * Returns 1 if the request has been terminated. 1502 * Returns 1 if the request has been terminated.
1503 * 0 if there was no need to terminate the request (not started yet)
1504 * negative error code if termination failed
1505 * Cancellation of a request is an asynchronous operation! The calling
1506 * function has to wait until the request is properly returned via callback.
1695 */ 1507 */
1696int 1508int dasd_cancel_req(struct dasd_ccw_req *cqr)
1697dasd_cancel_req(struct dasd_ccw_req *cqr)
1698{ 1509{
1699 struct dasd_device *device = cqr->device; 1510 struct dasd_device *device = cqr->startdev;
1700 unsigned long flags; 1511 unsigned long flags;
1701 int rc; 1512 int rc;
1702 1513
@@ -1704,74 +1515,453 @@ dasd_cancel_req(struct dasd_ccw_req *cqr)
1704 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1515 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1705 switch (cqr->status) { 1516 switch (cqr->status) {
1706 case DASD_CQR_QUEUED: 1517 case DASD_CQR_QUEUED:
1707 /* request was not started - just set to failed */ 1518 /* request was not started - just set to cleared */
1708 cqr->status = DASD_CQR_FAILED; 1519 cqr->status = DASD_CQR_CLEARED;
1709 break; 1520 break;
1710 case DASD_CQR_IN_IO: 1521 case DASD_CQR_IN_IO:
1711 /* request in IO - terminate IO and release again */ 1522 /* request in IO - terminate IO and release again */
1712 if (device->discipline->term_IO(cqr) != 0) 1523 rc = device->discipline->term_IO(cqr);
1713 /* what to do if unable to terminate ?????? 1524 if (rc) {
1714 e.g. not _IN_IO */ 1525 DEV_MESSAGE(KERN_ERR, device,
1715 cqr->status = DASD_CQR_FAILED; 1526 "dasd_cancel_req is unable "
1716 cqr->stopclk = get_clock(); 1527 " to terminate request %p, rc = %d",
1717 rc = 1; 1528 cqr, rc);
1529 } else {
1530 cqr->stopclk = get_clock();
1531 rc = 1;
1532 }
1718 break; 1533 break;
1719 case DASD_CQR_DONE: 1534 default: /* already finished or clear pending - do nothing */
1720 case DASD_CQR_FAILED:
1721 /* already finished - do nothing */
1722 break; 1535 break;
1723 default: 1536 }
1724 DEV_MESSAGE(KERN_ALERT, device, 1537 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1725 "invalid status %02x in request", 1538 dasd_schedule_device_bh(device);
1726 cqr->status); 1539 return rc;
1540}
1541
1542
1543/*
1544 * SECTION: Operations of the dasd_block layer.
1545 */
1546
1547/*
1548 * Timeout function for dasd_block. This is used when the block layer
1549 * is waiting for something that may not come reliably, (e.g. a state
1550 * change interrupt)
1551 */
1552static void dasd_block_timeout(unsigned long ptr)
1553{
1554 unsigned long flags;
1555 struct dasd_block *block;
1556
1557 block = (struct dasd_block *) ptr;
1558 spin_lock_irqsave(get_ccwdev_lock(block->base->cdev), flags);
1559 /* re-activate request queue */
1560 block->base->stopped &= ~DASD_STOPPED_PENDING;
1561 spin_unlock_irqrestore(get_ccwdev_lock(block->base->cdev), flags);
1562 dasd_schedule_block_bh(block);
1563}
1564
1565/*
1566 * Setup timeout for a dasd_block in jiffies.
1567 */
1568void dasd_block_set_timer(struct dasd_block *block, int expires)
1569{
1570 if (expires == 0) {
1571 if (timer_pending(&block->timer))
1572 del_timer(&block->timer);
1573 return;
1574 }
1575 if (timer_pending(&block->timer)) {
1576 if (mod_timer(&block->timer, jiffies + expires))
1577 return;
1578 }
1579 block->timer.function = dasd_block_timeout;
1580 block->timer.data = (unsigned long) block;
1581 block->timer.expires = jiffies + expires;
1582 add_timer(&block->timer);
1583}
1584
1585/*
1586 * Clear timeout for a dasd_block.
1587 */
1588void dasd_block_clear_timer(struct dasd_block *block)
1589{
1590 if (timer_pending(&block->timer))
1591 del_timer(&block->timer);
1592}
1593
1594/*
1595 * posts the buffer_cache about a finalized request
1596 */
1597static inline void dasd_end_request(struct request *req, int uptodate)
1598{
1599 if (end_that_request_first(req, uptodate, req->hard_nr_sectors))
1727 BUG(); 1600 BUG();
1601 add_disk_randomness(req->rq_disk);
1602 end_that_request_last(req, uptodate);
1603}
1728 1604
1605/*
1606 * Process finished error recovery ccw.
1607 */
1608static inline void __dasd_block_process_erp(struct dasd_block *block,
1609 struct dasd_ccw_req *cqr)
1610{
1611 dasd_erp_fn_t erp_fn;
1612 struct dasd_device *device = block->base;
1613
1614 if (cqr->status == DASD_CQR_DONE)
1615 DBF_DEV_EVENT(DBF_NOTICE, device, "%s", "ERP successful");
1616 else
1617 DEV_MESSAGE(KERN_ERR, device, "%s", "ERP unsuccessful");
1618 erp_fn = device->discipline->erp_postaction(cqr);
1619 erp_fn(cqr);
1620}
1621
1622/*
1623 * Fetch requests from the block device queue.
1624 */
1625static void __dasd_process_request_queue(struct dasd_block *block)
1626{
1627 struct request_queue *queue;
1628 struct request *req;
1629 struct dasd_ccw_req *cqr;
1630 struct dasd_device *basedev;
1631 unsigned long flags;
1632 queue = block->request_queue;
1633 basedev = block->base;
1634 /* No queue ? Then there is nothing to do. */
1635 if (queue == NULL)
1636 return;
1637
1638 /*
1639 * We requeue request from the block device queue to the ccw
1640 * queue only in two states. In state DASD_STATE_READY the
1641 * partition detection is done and we need to requeue requests
1642 * for that. State DASD_STATE_ONLINE is normal block device
1643 * operation.
1644 */
1645 if (basedev->state < DASD_STATE_READY)
1646 return;
1647 /* Now we try to fetch requests from the request queue */
1648 while (!blk_queue_plugged(queue) &&
1649 elv_next_request(queue)) {
1650
1651 req = elv_next_request(queue);
1652
1653 if (basedev->features & DASD_FEATURE_READONLY &&
1654 rq_data_dir(req) == WRITE) {
1655 DBF_DEV_EVENT(DBF_ERR, basedev,
1656 "Rejecting write request %p",
1657 req);
1658 blkdev_dequeue_request(req);
1659 dasd_end_request(req, 0);
1660 continue;
1661 }
1662 cqr = basedev->discipline->build_cp(basedev, block, req);
1663 if (IS_ERR(cqr)) {
1664 if (PTR_ERR(cqr) == -EBUSY)
1665 break; /* normal end condition */
1666 if (PTR_ERR(cqr) == -ENOMEM)
1667 break; /* terminate request queue loop */
1668 if (PTR_ERR(cqr) == -EAGAIN) {
1669 /*
1670 * The current request cannot be build right
1671 * now, we have to try later. If this request
1672 * is the head-of-queue we stop the device
1673 * for 1/2 second.
1674 */
1675 if (!list_empty(&block->ccw_queue))
1676 break;
1677 spin_lock_irqsave(get_ccwdev_lock(basedev->cdev), flags);
1678 basedev->stopped |= DASD_STOPPED_PENDING;
1679 spin_unlock_irqrestore(get_ccwdev_lock(basedev->cdev), flags);
1680 dasd_block_set_timer(block, HZ/2);
1681 break;
1682 }
1683 DBF_DEV_EVENT(DBF_ERR, basedev,
1684 "CCW creation failed (rc=%ld) "
1685 "on request %p",
1686 PTR_ERR(cqr), req);
1687 blkdev_dequeue_request(req);
1688 dasd_end_request(req, 0);
1689 continue;
1690 }
1691 /*
1692 * Note: callback is set to dasd_return_cqr_cb in
1693 * __dasd_block_start_head to cover erp requests as well
1694 */
1695 cqr->callback_data = (void *) req;
1696 cqr->status = DASD_CQR_FILLED;
1697 blkdev_dequeue_request(req);
1698 list_add_tail(&cqr->blocklist, &block->ccw_queue);
1699 dasd_profile_start(block, cqr, req);
1700 }
1701}
1702
1703static void __dasd_cleanup_cqr(struct dasd_ccw_req *cqr)
1704{
1705 struct request *req;
1706 int status;
1707
1708 req = (struct request *) cqr->callback_data;
1709 dasd_profile_end(cqr->block, cqr, req);
1710 status = cqr->memdev->discipline->free_cp(cqr, req);
1711 dasd_end_request(req, status);
1712}
1713
1714/*
1715 * Process ccw request queue.
1716 */
1717static void __dasd_process_block_ccw_queue(struct dasd_block *block,
1718 struct list_head *final_queue)
1719{
1720 struct list_head *l, *n;
1721 struct dasd_ccw_req *cqr;
1722 dasd_erp_fn_t erp_fn;
1723 unsigned long flags;
1724 struct dasd_device *base = block->base;
1725
1726restart:
1727 /* Process request with final status. */
1728 list_for_each_safe(l, n, &block->ccw_queue) {
1729 cqr = list_entry(l, struct dasd_ccw_req, blocklist);
1730 if (cqr->status != DASD_CQR_DONE &&
1731 cqr->status != DASD_CQR_FAILED &&
1732 cqr->status != DASD_CQR_NEED_ERP &&
1733 cqr->status != DASD_CQR_TERMINATED)
1734 continue;
1735
1736 if (cqr->status == DASD_CQR_TERMINATED) {
1737 base->discipline->handle_terminated_request(cqr);
1738 goto restart;
1739 }
1740
1741 /* Process requests that may be recovered */
1742 if (cqr->status == DASD_CQR_NEED_ERP) {
1743 if (cqr->irb.esw.esw0.erw.cons &&
1744 test_bit(DASD_CQR_FLAGS_USE_ERP,
1745 &cqr->flags)) {
1746 erp_fn = base->discipline->erp_action(cqr);
1747 erp_fn(cqr);
1748 }
1749 goto restart;
1750 }
1751
1752 /* First of all call extended error reporting. */
1753 if (dasd_eer_enabled(base) &&
1754 cqr->status == DASD_CQR_FAILED) {
1755 dasd_eer_write(base, cqr, DASD_EER_FATALERROR);
1756
1757 /* restart request */
1758 cqr->status = DASD_CQR_FILLED;
1759 cqr->retries = 255;
1760 spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags);
1761 base->stopped |= DASD_STOPPED_QUIESCE;
1762 spin_unlock_irqrestore(get_ccwdev_lock(base->cdev),
1763 flags);
1764 goto restart;
1765 }
1766
1767 /* Process finished ERP request. */
1768 if (cqr->refers) {
1769 __dasd_block_process_erp(block, cqr);
1770 goto restart;
1771 }
1772
1773 /* Rechain finished requests to final queue */
1774 cqr->endclk = get_clock();
1775 list_move_tail(&cqr->blocklist, final_queue);
1776 }
1777}
1778
1779static void dasd_return_cqr_cb(struct dasd_ccw_req *cqr, void *data)
1780{
1781 dasd_schedule_block_bh(cqr->block);
1782}
1783
1784static void __dasd_block_start_head(struct dasd_block *block)
1785{
1786 struct dasd_ccw_req *cqr;
1787
1788 if (list_empty(&block->ccw_queue))
1789 return;
1790 /* We allways begin with the first requests on the queue, as some
1791 * of previously started requests have to be enqueued on a
1792 * dasd_device again for error recovery.
1793 */
1794 list_for_each_entry(cqr, &block->ccw_queue, blocklist) {
1795 if (cqr->status != DASD_CQR_FILLED)
1796 continue;
1797 /* Non-temporary stop condition will trigger fail fast */
1798 if (block->base->stopped & ~DASD_STOPPED_PENDING &&
1799 test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
1800 (!dasd_eer_enabled(block->base))) {
1801 cqr->status = DASD_CQR_FAILED;
1802 dasd_schedule_block_bh(block);
1803 continue;
1804 }
1805 /* Don't try to start requests if device is stopped */
1806 if (block->base->stopped)
1807 return;
1808
1809 /* just a fail safe check, should not happen */
1810 if (!cqr->startdev)
1811 cqr->startdev = block->base;
1812
1813 /* make sure that the requests we submit find their way back */
1814 cqr->callback = dasd_return_cqr_cb;
1815
1816 dasd_add_request_tail(cqr);
1817 }
1818}
1819
1820/*
1821 * Central dasd_block layer routine. Takes requests from the generic
1822 * block layer request queue, creates ccw requests, enqueues them on
1823 * a dasd_device and processes ccw requests that have been returned.
1824 */
1825static void dasd_block_tasklet(struct dasd_block *block)
1826{
1827 struct list_head final_queue;
1828 struct list_head *l, *n;
1829 struct dasd_ccw_req *cqr;
1830
1831 atomic_set(&block->tasklet_scheduled, 0);
1832 INIT_LIST_HEAD(&final_queue);
1833 spin_lock(&block->queue_lock);
1834 /* Finish off requests on ccw queue */
1835 __dasd_process_block_ccw_queue(block, &final_queue);
1836 spin_unlock(&block->queue_lock);
1837 /* Now call the callback function of requests with final status */
1838 spin_lock_irq(&block->request_queue_lock);
1839 list_for_each_safe(l, n, &final_queue) {
1840 cqr = list_entry(l, struct dasd_ccw_req, blocklist);
1841 list_del_init(&cqr->blocklist);
1842 __dasd_cleanup_cqr(cqr);
1843 }
1844 spin_lock(&block->queue_lock);
1845 /* Get new request from the block device request queue */
1846 __dasd_process_request_queue(block);
1847 /* Now check if the head of the ccw queue needs to be started. */
1848 __dasd_block_start_head(block);
1849 spin_unlock(&block->queue_lock);
1850 spin_unlock_irq(&block->request_queue_lock);
1851 dasd_put_device(block->base);
1852}
1853
1854static void _dasd_wake_block_flush_cb(struct dasd_ccw_req *cqr, void *data)
1855{
1856 wake_up(&dasd_flush_wq);
1857}
1858
1859/*
1860 * Go through all request on the dasd_block request queue, cancel them
1861 * on the respective dasd_device, and return them to the generic
1862 * block layer.
1863 */
1864static int dasd_flush_block_queue(struct dasd_block *block)
1865{
1866 struct dasd_ccw_req *cqr, *n;
1867 int rc, i;
1868 struct list_head flush_queue;
1869
1870 INIT_LIST_HEAD(&flush_queue);
1871 spin_lock_bh(&block->queue_lock);
1872 rc = 0;
1873restart:
1874 list_for_each_entry_safe(cqr, n, &block->ccw_queue, blocklist) {
1875 /* if this request currently owned by a dasd_device cancel it */
1876 if (cqr->status >= DASD_CQR_QUEUED)
1877 rc = dasd_cancel_req(cqr);
1878 if (rc < 0)
1879 break;
1880 /* Rechain request (including erp chain) so it won't be
1881 * touched by the dasd_block_tasklet anymore.
1882 * Replace the callback so we notice when the request
1883 * is returned from the dasd_device layer.
1884 */
1885 cqr->callback = _dasd_wake_block_flush_cb;
1886 for (i = 0; cqr != NULL; cqr = cqr->refers, i++)
1887 list_move_tail(&cqr->blocklist, &flush_queue);
1888 if (i > 1)
1889 /* moved more than one request - need to restart */
1890 goto restart;
1891 }
1892 spin_unlock_bh(&block->queue_lock);
1893 /* Now call the callback function of flushed requests */
1894restart_cb:
1895 list_for_each_entry_safe(cqr, n, &flush_queue, blocklist) {
1896 wait_event(dasd_flush_wq, (cqr->status < DASD_CQR_QUEUED));
1897 /* Process finished ERP request. */
1898 if (cqr->refers) {
1899 __dasd_block_process_erp(block, cqr);
1900 /* restart list_for_xx loop since dasd_process_erp
1901 * might remove multiple elements */
1902 goto restart_cb;
1903 }
1904 /* call the callback function */
1905 cqr->endclk = get_clock();
1906 list_del_init(&cqr->blocklist);
1907 __dasd_cleanup_cqr(cqr);
1729 } 1908 }
1730 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1731 dasd_schedule_bh(device);
1732 return rc; 1909 return rc;
1733} 1910}
1734 1911
1735/* 1912/*
1736 * SECTION: Block device operations (request queue, partitions, open, release). 1913 * Schedules a call to dasd_tasklet over the device tasklet.
1914 */
1915void dasd_schedule_block_bh(struct dasd_block *block)
1916{
1917 /* Protect against rescheduling. */
1918 if (atomic_cmpxchg(&block->tasklet_scheduled, 0, 1) != 0)
1919 return;
1920 /* life cycle of block is bound to it's base device */
1921 dasd_get_device(block->base);
1922 tasklet_hi_schedule(&block->tasklet);
1923}
1924
1925
1926/*
1927 * SECTION: external block device operations
1928 * (request queue handling, open, release, etc.)
1737 */ 1929 */
1738 1930
1739/* 1931/*
1740 * Dasd request queue function. Called from ll_rw_blk.c 1932 * Dasd request queue function. Called from ll_rw_blk.c
1741 */ 1933 */
1742static void 1934static void do_dasd_request(struct request_queue *queue)
1743do_dasd_request(struct request_queue * queue)
1744{ 1935{
1745 struct dasd_device *device; 1936 struct dasd_block *block;
1746 1937
1747 device = (struct dasd_device *) queue->queuedata; 1938 block = queue->queuedata;
1748 spin_lock(get_ccwdev_lock(device->cdev)); 1939 spin_lock(&block->queue_lock);
1749 /* Get new request from the block device request queue */ 1940 /* Get new request from the block device request queue */
1750 __dasd_process_blk_queue(device); 1941 __dasd_process_request_queue(block);
1751 /* Now check if the head of the ccw queue needs to be started. */ 1942 /* Now check if the head of the ccw queue needs to be started. */
1752 __dasd_start_head(device); 1943 __dasd_block_start_head(block);
1753 spin_unlock(get_ccwdev_lock(device->cdev)); 1944 spin_unlock(&block->queue_lock);
1754} 1945}
1755 1946
1756/* 1947/*
1757 * Allocate and initialize request queue and default I/O scheduler. 1948 * Allocate and initialize request queue and default I/O scheduler.
1758 */ 1949 */
1759static int 1950static int dasd_alloc_queue(struct dasd_block *block)
1760dasd_alloc_queue(struct dasd_device * device)
1761{ 1951{
1762 int rc; 1952 int rc;
1763 1953
1764 device->request_queue = blk_init_queue(do_dasd_request, 1954 block->request_queue = blk_init_queue(do_dasd_request,
1765 &device->request_queue_lock); 1955 &block->request_queue_lock);
1766 if (device->request_queue == NULL) 1956 if (block->request_queue == NULL)
1767 return -ENOMEM; 1957 return -ENOMEM;
1768 1958
1769 device->request_queue->queuedata = device; 1959 block->request_queue->queuedata = block;
1770 1960
1771 elevator_exit(device->request_queue->elevator); 1961 elevator_exit(block->request_queue->elevator);
1772 rc = elevator_init(device->request_queue, "deadline"); 1962 rc = elevator_init(block->request_queue, "deadline");
1773 if (rc) { 1963 if (rc) {
1774 blk_cleanup_queue(device->request_queue); 1964 blk_cleanup_queue(block->request_queue);
1775 return rc; 1965 return rc;
1776 } 1966 }
1777 return 0; 1967 return 0;
@@ -1780,79 +1970,76 @@ dasd_alloc_queue(struct dasd_device * device)
1780/* 1970/*
1781 * Allocate and initialize request queue. 1971 * Allocate and initialize request queue.
1782 */ 1972 */
1783static void 1973static void dasd_setup_queue(struct dasd_block *block)
1784dasd_setup_queue(struct dasd_device * device)
1785{ 1974{
1786 int max; 1975 int max;
1787 1976
1788 blk_queue_hardsect_size(device->request_queue, device->bp_block); 1977 blk_queue_hardsect_size(block->request_queue, block->bp_block);
1789 max = device->discipline->max_blocks << device->s2b_shift; 1978 max = block->base->discipline->max_blocks << block->s2b_shift;
1790 blk_queue_max_sectors(device->request_queue, max); 1979 blk_queue_max_sectors(block->request_queue, max);
1791 blk_queue_max_phys_segments(device->request_queue, -1L); 1980 blk_queue_max_phys_segments(block->request_queue, -1L);
1792 blk_queue_max_hw_segments(device->request_queue, -1L); 1981 blk_queue_max_hw_segments(block->request_queue, -1L);
1793 blk_queue_max_segment_size(device->request_queue, -1L); 1982 blk_queue_max_segment_size(block->request_queue, -1L);
1794 blk_queue_segment_boundary(device->request_queue, -1L); 1983 blk_queue_segment_boundary(block->request_queue, -1L);
1795 blk_queue_ordered(device->request_queue, QUEUE_ORDERED_TAG, NULL); 1984 blk_queue_ordered(block->request_queue, QUEUE_ORDERED_DRAIN, NULL);
1796} 1985}
1797 1986
1798/* 1987/*
1799 * Deactivate and free request queue. 1988 * Deactivate and free request queue.
1800 */ 1989 */
1801static void 1990static void dasd_free_queue(struct dasd_block *block)
1802dasd_free_queue(struct dasd_device * device)
1803{ 1991{
1804 if (device->request_queue) { 1992 if (block->request_queue) {
1805 blk_cleanup_queue(device->request_queue); 1993 blk_cleanup_queue(block->request_queue);
1806 device->request_queue = NULL; 1994 block->request_queue = NULL;
1807 } 1995 }
1808} 1996}
1809 1997
1810/* 1998/*
1811 * Flush request on the request queue. 1999 * Flush request on the request queue.
1812 */ 2000 */
1813static void 2001static void dasd_flush_request_queue(struct dasd_block *block)
1814dasd_flush_request_queue(struct dasd_device * device)
1815{ 2002{
1816 struct request *req; 2003 struct request *req;
1817 2004
1818 if (!device->request_queue) 2005 if (!block->request_queue)
1819 return; 2006 return;
1820 2007
1821 spin_lock_irq(&device->request_queue_lock); 2008 spin_lock_irq(&block->request_queue_lock);
1822 while ((req = elv_next_request(device->request_queue))) { 2009 while ((req = elv_next_request(block->request_queue))) {
1823 blkdev_dequeue_request(req); 2010 blkdev_dequeue_request(req);
1824 dasd_end_request(req, 0); 2011 dasd_end_request(req, 0);
1825 } 2012 }
1826 spin_unlock_irq(&device->request_queue_lock); 2013 spin_unlock_irq(&block->request_queue_lock);
1827} 2014}
1828 2015
1829static int 2016static int dasd_open(struct inode *inp, struct file *filp)
1830dasd_open(struct inode *inp, struct file *filp)
1831{ 2017{
1832 struct gendisk *disk = inp->i_bdev->bd_disk; 2018 struct gendisk *disk = inp->i_bdev->bd_disk;
1833 struct dasd_device *device = disk->private_data; 2019 struct dasd_block *block = disk->private_data;
2020 struct dasd_device *base = block->base;
1834 int rc; 2021 int rc;
1835 2022
1836 atomic_inc(&device->open_count); 2023 atomic_inc(&block->open_count);
1837 if (test_bit(DASD_FLAG_OFFLINE, &device->flags)) { 2024 if (test_bit(DASD_FLAG_OFFLINE, &base->flags)) {
1838 rc = -ENODEV; 2025 rc = -ENODEV;
1839 goto unlock; 2026 goto unlock;
1840 } 2027 }
1841 2028
1842 if (!try_module_get(device->discipline->owner)) { 2029 if (!try_module_get(base->discipline->owner)) {
1843 rc = -EINVAL; 2030 rc = -EINVAL;
1844 goto unlock; 2031 goto unlock;
1845 } 2032 }
1846 2033
1847 if (dasd_probeonly) { 2034 if (dasd_probeonly) {
1848 DEV_MESSAGE(KERN_INFO, device, "%s", 2035 DEV_MESSAGE(KERN_INFO, base, "%s",
1849 "No access to device due to probeonly mode"); 2036 "No access to device due to probeonly mode");
1850 rc = -EPERM; 2037 rc = -EPERM;
1851 goto out; 2038 goto out;
1852 } 2039 }
1853 2040
1854 if (device->state <= DASD_STATE_BASIC) { 2041 if (base->state <= DASD_STATE_BASIC) {
1855 DBF_DEV_EVENT(DBF_ERR, device, " %s", 2042 DBF_DEV_EVENT(DBF_ERR, base, " %s",
1856 " Cannot open unrecognized device"); 2043 " Cannot open unrecognized device");
1857 rc = -ENODEV; 2044 rc = -ENODEV;
1858 goto out; 2045 goto out;
@@ -1861,41 +2048,41 @@ dasd_open(struct inode *inp, struct file *filp)
1861 return 0; 2048 return 0;
1862 2049
1863out: 2050out:
1864 module_put(device->discipline->owner); 2051 module_put(base->discipline->owner);
1865unlock: 2052unlock:
1866 atomic_dec(&device->open_count); 2053 atomic_dec(&block->open_count);
1867 return rc; 2054 return rc;
1868} 2055}
1869 2056
1870static int 2057static int dasd_release(struct inode *inp, struct file *filp)
1871dasd_release(struct inode *inp, struct file *filp)
1872{ 2058{
1873 struct gendisk *disk = inp->i_bdev->bd_disk; 2059 struct gendisk *disk = inp->i_bdev->bd_disk;
1874 struct dasd_device *device = disk->private_data; 2060 struct dasd_block *block = disk->private_data;
1875 2061
1876 atomic_dec(&device->open_count); 2062 atomic_dec(&block->open_count);
1877 module_put(device->discipline->owner); 2063 module_put(block->base->discipline->owner);
1878 return 0; 2064 return 0;
1879} 2065}
1880 2066
1881/* 2067/*
1882 * Return disk geometry. 2068 * Return disk geometry.
1883 */ 2069 */
1884static int 2070static int dasd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1885dasd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1886{ 2071{
1887 struct dasd_device *device; 2072 struct dasd_block *block;
2073 struct dasd_device *base;
1888 2074
1889 device = bdev->bd_disk->private_data; 2075 block = bdev->bd_disk->private_data;
1890 if (!device) 2076 base = block->base;
2077 if (!block)
1891 return -ENODEV; 2078 return -ENODEV;
1892 2079
1893 if (!device->discipline || 2080 if (!base->discipline ||
1894 !device->discipline->fill_geometry) 2081 !base->discipline->fill_geometry)
1895 return -EINVAL; 2082 return -EINVAL;
1896 2083
1897 device->discipline->fill_geometry(device, geo); 2084 base->discipline->fill_geometry(block, geo);
1898 geo->start = get_start_sect(bdev) >> device->s2b_shift; 2085 geo->start = get_start_sect(bdev) >> block->s2b_shift;
1899 return 0; 2086 return 0;
1900} 2087}
1901 2088
@@ -1909,6 +2096,9 @@ dasd_device_operations = {
1909 .getgeo = dasd_getgeo, 2096 .getgeo = dasd_getgeo,
1910}; 2097};
1911 2098
2099/*******************************************************************************
2100 * end of block device operations
2101 */
1912 2102
1913static void 2103static void
1914dasd_exit(void) 2104dasd_exit(void)
@@ -1937,9 +2127,8 @@ dasd_exit(void)
1937 * Initial attempt at a probe function. this can be simplified once 2127 * Initial attempt at a probe function. this can be simplified once
1938 * the other detection code is gone. 2128 * the other detection code is gone.
1939 */ 2129 */
1940int 2130int dasd_generic_probe(struct ccw_device *cdev,
1941dasd_generic_probe (struct ccw_device *cdev, 2131 struct dasd_discipline *discipline)
1942 struct dasd_discipline *discipline)
1943{ 2132{
1944 int ret; 2133 int ret;
1945 2134
@@ -1979,10 +2168,10 @@ dasd_generic_probe (struct ccw_device *cdev,
1979 * This will one day be called from a global not_oper handler. 2168 * This will one day be called from a global not_oper handler.
1980 * It is also used by driver_unregister during module unload. 2169 * It is also used by driver_unregister during module unload.
1981 */ 2170 */
1982void 2171void dasd_generic_remove(struct ccw_device *cdev)
1983dasd_generic_remove (struct ccw_device *cdev)
1984{ 2172{
1985 struct dasd_device *device; 2173 struct dasd_device *device;
2174 struct dasd_block *block;
1986 2175
1987 cdev->handler = NULL; 2176 cdev->handler = NULL;
1988 2177
@@ -2002,7 +2191,15 @@ dasd_generic_remove (struct ccw_device *cdev)
2002 */ 2191 */
2003 dasd_set_target_state(device, DASD_STATE_NEW); 2192 dasd_set_target_state(device, DASD_STATE_NEW);
2004 /* dasd_delete_device destroys the device reference. */ 2193 /* dasd_delete_device destroys the device reference. */
2194 block = device->block;
2195 device->block = NULL;
2005 dasd_delete_device(device); 2196 dasd_delete_device(device);
2197 /*
2198 * life cycle of block is bound to device, so delete it after
2199 * device was safely removed
2200 */
2201 if (block)
2202 dasd_free_block(block);
2006} 2203}
2007 2204
2008/* 2205/*
@@ -2010,10 +2207,8 @@ dasd_generic_remove (struct ccw_device *cdev)
2010 * the device is detected for the first time and is supposed to be used 2207 * the device is detected for the first time and is supposed to be used
2011 * or the user has started activation through sysfs. 2208 * or the user has started activation through sysfs.
2012 */ 2209 */
2013int 2210int dasd_generic_set_online(struct ccw_device *cdev,
2014dasd_generic_set_online (struct ccw_device *cdev, 2211 struct dasd_discipline *base_discipline)
2015 struct dasd_discipline *base_discipline)
2016
2017{ 2212{
2018 struct dasd_discipline *discipline; 2213 struct dasd_discipline *discipline;
2019 struct dasd_device *device; 2214 struct dasd_device *device;
@@ -2049,6 +2244,7 @@ dasd_generic_set_online (struct ccw_device *cdev,
2049 device->base_discipline = base_discipline; 2244 device->base_discipline = base_discipline;
2050 device->discipline = discipline; 2245 device->discipline = discipline;
2051 2246
2247 /* check_device will allocate block device if necessary */
2052 rc = discipline->check_device(device); 2248 rc = discipline->check_device(device);
2053 if (rc) { 2249 if (rc) {
2054 printk (KERN_WARNING 2250 printk (KERN_WARNING
@@ -2068,6 +2264,8 @@ dasd_generic_set_online (struct ccw_device *cdev,
2068 cdev->dev.bus_id); 2264 cdev->dev.bus_id);
2069 rc = -ENODEV; 2265 rc = -ENODEV;
2070 dasd_set_target_state(device, DASD_STATE_NEW); 2266 dasd_set_target_state(device, DASD_STATE_NEW);
2267 if (device->block)
2268 dasd_free_block(device->block);
2071 dasd_delete_device(device); 2269 dasd_delete_device(device);
2072 } else 2270 } else
2073 pr_debug("dasd_generic device %s found\n", 2271 pr_debug("dasd_generic device %s found\n",
@@ -2082,10 +2280,10 @@ dasd_generic_set_online (struct ccw_device *cdev,
2082 return rc; 2280 return rc;
2083} 2281}
2084 2282
2085int 2283int dasd_generic_set_offline(struct ccw_device *cdev)
2086dasd_generic_set_offline (struct ccw_device *cdev)
2087{ 2284{
2088 struct dasd_device *device; 2285 struct dasd_device *device;
2286 struct dasd_block *block;
2089 int max_count, open_count; 2287 int max_count, open_count;
2090 2288
2091 device = dasd_device_from_cdev(cdev); 2289 device = dasd_device_from_cdev(cdev);
@@ -2102,30 +2300,39 @@ dasd_generic_set_offline (struct ccw_device *cdev)
2102 * the blkdev_get in dasd_scan_partitions. We are only interested 2300 * the blkdev_get in dasd_scan_partitions. We are only interested
2103 * in the other openers. 2301 * in the other openers.
2104 */ 2302 */
2105 max_count = device->bdev ? 0 : -1; 2303 if (device->block) {
2106 open_count = (int) atomic_read(&device->open_count); 2304 struct dasd_block *block = device->block;
2107 if (open_count > max_count) { 2305 max_count = block->bdev ? 0 : -1;
2108 if (open_count > 0) 2306 open_count = (int) atomic_read(&block->open_count);
2109 printk (KERN_WARNING "Can't offline dasd device with " 2307 if (open_count > max_count) {
2110 "open count = %i.\n", 2308 if (open_count > 0)
2111 open_count); 2309 printk(KERN_WARNING "Can't offline dasd "
2112 else 2310 "device with open count = %i.\n",
2113 printk (KERN_WARNING "%s", 2311 open_count);
2114 "Can't offline dasd device due to internal " 2312 else
2115 "use\n"); 2313 printk(KERN_WARNING "%s",
2116 clear_bit(DASD_FLAG_OFFLINE, &device->flags); 2314 "Can't offline dasd device due "
2117 dasd_put_device(device); 2315 "to internal use\n");
2118 return -EBUSY; 2316 clear_bit(DASD_FLAG_OFFLINE, &device->flags);
2317 dasd_put_device(device);
2318 return -EBUSY;
2319 }
2119 } 2320 }
2120 dasd_set_target_state(device, DASD_STATE_NEW); 2321 dasd_set_target_state(device, DASD_STATE_NEW);
2121 /* dasd_delete_device destroys the device reference. */ 2322 /* dasd_delete_device destroys the device reference. */
2323 block = device->block;
2324 device->block = NULL;
2122 dasd_delete_device(device); 2325 dasd_delete_device(device);
2123 2326 /*
2327 * life cycle of block is bound to device, so delete it after
2328 * device was safely removed
2329 */
2330 if (block)
2331 dasd_free_block(block);
2124 return 0; 2332 return 0;
2125} 2333}
2126 2334
2127int 2335int dasd_generic_notify(struct ccw_device *cdev, int event)
2128dasd_generic_notify(struct ccw_device *cdev, int event)
2129{ 2336{
2130 struct dasd_device *device; 2337 struct dasd_device *device;
2131 struct dasd_ccw_req *cqr; 2338 struct dasd_ccw_req *cqr;
@@ -2146,27 +2353,22 @@ dasd_generic_notify(struct ccw_device *cdev, int event)
2146 if (device->state < DASD_STATE_BASIC) 2353 if (device->state < DASD_STATE_BASIC)
2147 break; 2354 break;
2148 /* Device is active. We want to keep it. */ 2355 /* Device is active. We want to keep it. */
2149 if (test_bit(DASD_FLAG_DSC_ERROR, &device->flags)) { 2356 list_for_each_entry(cqr, &device->ccw_queue, devlist)
2150 list_for_each_entry(cqr, &device->ccw_queue, list) 2357 if (cqr->status == DASD_CQR_IN_IO) {
2151 if (cqr->status == DASD_CQR_IN_IO) 2358 cqr->status = DASD_CQR_QUEUED;
2152 cqr->status = DASD_CQR_FAILED; 2359 cqr->retries++;
2153 device->stopped |= DASD_STOPPED_DC_EIO; 2360 }
2154 } else { 2361 device->stopped |= DASD_STOPPED_DC_WAIT;
2155 list_for_each_entry(cqr, &device->ccw_queue, list) 2362 dasd_device_clear_timer(device);
2156 if (cqr->status == DASD_CQR_IN_IO) { 2363 dasd_schedule_device_bh(device);
2157 cqr->status = DASD_CQR_QUEUED;
2158 cqr->retries++;
2159 }
2160 device->stopped |= DASD_STOPPED_DC_WAIT;
2161 dasd_set_timer(device, 0);
2162 }
2163 dasd_schedule_bh(device);
2164 ret = 1; 2364 ret = 1;
2165 break; 2365 break;
2166 case CIO_OPER: 2366 case CIO_OPER:
2167 /* FIXME: add a sanity check. */ 2367 /* FIXME: add a sanity check. */
2168 device->stopped &= ~(DASD_STOPPED_DC_WAIT|DASD_STOPPED_DC_EIO); 2368 device->stopped &= ~DASD_STOPPED_DC_WAIT;
2169 dasd_schedule_bh(device); 2369 dasd_schedule_device_bh(device);
2370 if (device->block)
2371 dasd_schedule_block_bh(device->block);
2170 ret = 1; 2372 ret = 1;
2171 break; 2373 break;
2172 } 2374 }
@@ -2196,7 +2398,8 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
2196 ccw->cda = (__u32)(addr_t)rdc_buffer; 2398 ccw->cda = (__u32)(addr_t)rdc_buffer;
2197 ccw->count = rdc_buffer_size; 2399 ccw->count = rdc_buffer_size;
2198 2400
2199 cqr->device = device; 2401 cqr->startdev = device;
2402 cqr->memdev = device;
2200 cqr->expires = 10*HZ; 2403 cqr->expires = 10*HZ;
2201 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 2404 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2202 cqr->retries = 2; 2405 cqr->retries = 2;
@@ -2218,13 +2421,12 @@ int dasd_generic_read_dev_chars(struct dasd_device *device, char *magic,
2218 return PTR_ERR(cqr); 2421 return PTR_ERR(cqr);
2219 2422
2220 ret = dasd_sleep_on(cqr); 2423 ret = dasd_sleep_on(cqr);
2221 dasd_sfree_request(cqr, cqr->device); 2424 dasd_sfree_request(cqr, cqr->memdev);
2222 return ret; 2425 return ret;
2223} 2426}
2224EXPORT_SYMBOL_GPL(dasd_generic_read_dev_chars); 2427EXPORT_SYMBOL_GPL(dasd_generic_read_dev_chars);
2225 2428
2226static int __init 2429static int __init dasd_init(void)
2227dasd_init(void)
2228{ 2430{
2229 int rc; 2431 int rc;
2230 2432
@@ -2232,7 +2434,7 @@ dasd_init(void)
2232 init_waitqueue_head(&dasd_flush_wq); 2434 init_waitqueue_head(&dasd_flush_wq);
2233 2435
2234 /* register 'common' DASD debug area, used for all DBF_XXX calls */ 2436 /* register 'common' DASD debug area, used for all DBF_XXX calls */
2235 dasd_debug_area = debug_register("dasd", 1, 2, 8 * sizeof (long)); 2437 dasd_debug_area = debug_register("dasd", 1, 2, 8 * sizeof(long));
2236 if (dasd_debug_area == NULL) { 2438 if (dasd_debug_area == NULL) {
2237 rc = -ENOMEM; 2439 rc = -ENOMEM;
2238 goto failed; 2440 goto failed;
@@ -2278,15 +2480,18 @@ EXPORT_SYMBOL(dasd_diag_discipline_pointer);
2278EXPORT_SYMBOL(dasd_add_request_head); 2480EXPORT_SYMBOL(dasd_add_request_head);
2279EXPORT_SYMBOL(dasd_add_request_tail); 2481EXPORT_SYMBOL(dasd_add_request_tail);
2280EXPORT_SYMBOL(dasd_cancel_req); 2482EXPORT_SYMBOL(dasd_cancel_req);
2281EXPORT_SYMBOL(dasd_clear_timer); 2483EXPORT_SYMBOL(dasd_device_clear_timer);
2484EXPORT_SYMBOL(dasd_block_clear_timer);
2282EXPORT_SYMBOL(dasd_enable_device); 2485EXPORT_SYMBOL(dasd_enable_device);
2283EXPORT_SYMBOL(dasd_int_handler); 2486EXPORT_SYMBOL(dasd_int_handler);
2284EXPORT_SYMBOL(dasd_kfree_request); 2487EXPORT_SYMBOL(dasd_kfree_request);
2285EXPORT_SYMBOL(dasd_kick_device); 2488EXPORT_SYMBOL(dasd_kick_device);
2286EXPORT_SYMBOL(dasd_kmalloc_request); 2489EXPORT_SYMBOL(dasd_kmalloc_request);
2287EXPORT_SYMBOL(dasd_schedule_bh); 2490EXPORT_SYMBOL(dasd_schedule_device_bh);
2491EXPORT_SYMBOL(dasd_schedule_block_bh);
2288EXPORT_SYMBOL(dasd_set_target_state); 2492EXPORT_SYMBOL(dasd_set_target_state);
2289EXPORT_SYMBOL(dasd_set_timer); 2493EXPORT_SYMBOL(dasd_device_set_timer);
2494EXPORT_SYMBOL(dasd_block_set_timer);
2290EXPORT_SYMBOL(dasd_sfree_request); 2495EXPORT_SYMBOL(dasd_sfree_request);
2291EXPORT_SYMBOL(dasd_sleep_on); 2496EXPORT_SYMBOL(dasd_sleep_on);
2292EXPORT_SYMBOL(dasd_sleep_on_immediatly); 2497EXPORT_SYMBOL(dasd_sleep_on_immediatly);
@@ -2300,4 +2505,7 @@ EXPORT_SYMBOL_GPL(dasd_generic_remove);
2300EXPORT_SYMBOL_GPL(dasd_generic_notify); 2505EXPORT_SYMBOL_GPL(dasd_generic_notify);
2301EXPORT_SYMBOL_GPL(dasd_generic_set_online); 2506EXPORT_SYMBOL_GPL(dasd_generic_set_online);
2302EXPORT_SYMBOL_GPL(dasd_generic_set_offline); 2507EXPORT_SYMBOL_GPL(dasd_generic_set_offline);
2303 2508EXPORT_SYMBOL_GPL(dasd_generic_handle_state_change);
2509EXPORT_SYMBOL_GPL(dasd_flush_device_queue);
2510EXPORT_SYMBOL_GPL(dasd_alloc_block);
2511EXPORT_SYMBOL_GPL(dasd_free_block);
diff --git a/drivers/s390/block/dasd_3370_erp.c b/drivers/s390/block/dasd_3370_erp.c
deleted file mode 100644
index 1ddab8991d92..000000000000
--- a/drivers/s390/block/dasd_3370_erp.c
+++ /dev/null
@@ -1,84 +0,0 @@
1/*
2 * File...........: linux/drivers/s390/block/dasd_3370_erp.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Bugreports.to..: <Linux390@de.ibm.com>
5 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000
6 *
7 */
8
9#define PRINTK_HEADER "dasd_erp(3370)"
10
11#include "dasd_int.h"
12
13
14/*
15 * DASD_3370_ERP_EXAMINE
16 *
17 * DESCRIPTION
18 * Checks only for fatal/no/recover error.
19 * A detailed examination of the sense data is done later outside
20 * the interrupt handler.
21 *
22 * The logic is based on the 'IBM 3880 Storage Control Reference' manual
23 * 'Chapter 7. 3370 Sense Data'.
24 *
25 * RETURN VALUES
26 * dasd_era_none no error
27 * dasd_era_fatal for all fatal (unrecoverable errors)
28 * dasd_era_recover for all others.
29 */
30dasd_era_t
31dasd_3370_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
32{
33 char *sense = irb->ecw;
34
35 /* check for successful execution first */
36 if (irb->scsw.cstat == 0x00 &&
37 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
38 return dasd_era_none;
39 if (sense[0] & 0x80) { /* CMD reject */
40 return dasd_era_fatal;
41 }
42 if (sense[0] & 0x40) { /* Drive offline */
43 return dasd_era_recover;
44 }
45 if (sense[0] & 0x20) { /* Bus out parity */
46 return dasd_era_recover;
47 }
48 if (sense[0] & 0x10) { /* equipment check */
49 if (sense[1] & 0x80) {
50 return dasd_era_fatal;
51 }
52 return dasd_era_recover;
53 }
54 if (sense[0] & 0x08) { /* data check */
55 if (sense[1] & 0x80) {
56 return dasd_era_fatal;
57 }
58 return dasd_era_recover;
59 }
60 if (sense[0] & 0x04) { /* overrun */
61 if (sense[1] & 0x80) {
62 return dasd_era_fatal;
63 }
64 return dasd_era_recover;
65 }
66 if (sense[1] & 0x40) { /* invalid blocksize */
67 return dasd_era_fatal;
68 }
69 if (sense[1] & 0x04) { /* file protected */
70 return dasd_era_recover;
71 }
72 if (sense[1] & 0x01) { /* operation incomplete */
73 return dasd_era_recover;
74 }
75 if (sense[2] & 0x80) { /* check data erroor */
76 return dasd_era_recover;
77 }
78 if (sense[2] & 0x10) { /* Env. data present */
79 return dasd_era_recover;
80 }
81 /* examine the 24 byte sense data */
82 return dasd_era_recover;
83
84} /* END dasd_3370_erp_examine */
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index c02f960eae15..c361ab69ec00 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -26,158 +26,6 @@ struct DCTL_data {
26 26
27/* 27/*
28 ***************************************************************************** 28 *****************************************************************************
29 * SECTION ERP EXAMINATION
30 *****************************************************************************
31 */
32
33/*
34 * DASD_3990_ERP_EXAMINE_24
35 *
36 * DESCRIPTION
37 * Checks only for fatal (unrecoverable) error.
38 * A detailed examination of the sense data is done later outside
39 * the interrupt handler.
40 *
41 * Each bit configuration leading to an action code 2 (Exit with
42 * programming error or unusual condition indication)
43 * are handled as fatal errors.
44 *
45 * All other configurations are handled as recoverable errors.
46 *
47 * RETURN VALUES
48 * dasd_era_fatal for all fatal (unrecoverable errors)
49 * dasd_era_recover for all others.
50 */
51static dasd_era_t
52dasd_3990_erp_examine_24(struct dasd_ccw_req * cqr, char *sense)
53{
54
55 struct dasd_device *device = cqr->device;
56
57 /* check for 'Command Reject' */
58 if ((sense[0] & SNS0_CMD_REJECT) &&
59 (!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
60
61 DEV_MESSAGE(KERN_ERR, device, "%s",
62 "EXAMINE 24: Command Reject detected - "
63 "fatal error");
64
65 return dasd_era_fatal;
66 }
67
68 /* check for 'Invalid Track Format' */
69 if ((sense[1] & SNS1_INV_TRACK_FORMAT) &&
70 (!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
71
72 DEV_MESSAGE(KERN_ERR, device, "%s",
73 "EXAMINE 24: Invalid Track Format detected "
74 "- fatal error");
75
76 return dasd_era_fatal;
77 }
78
79 /* check for 'No Record Found' */
80 if (sense[1] & SNS1_NO_REC_FOUND) {
81
82 /* FIXME: fatal error ?!? */
83 DEV_MESSAGE(KERN_ERR, device,
84 "EXAMINE 24: No Record Found detected %s",
85 device->state <= DASD_STATE_BASIC ?
86 " " : "- fatal error");
87
88 return dasd_era_fatal;
89 }
90
91 /* return recoverable for all others */
92 return dasd_era_recover;
93} /* END dasd_3990_erp_examine_24 */
94
95/*
96 * DASD_3990_ERP_EXAMINE_32
97 *
98 * DESCRIPTION
99 * Checks only for fatal/no/recoverable error.
100 * A detailed examination of the sense data is done later outside
101 * the interrupt handler.
102 *
103 * RETURN VALUES
104 * dasd_era_none no error
105 * dasd_era_fatal for all fatal (unrecoverable errors)
106 * dasd_era_recover for recoverable others.
107 */
108static dasd_era_t
109dasd_3990_erp_examine_32(struct dasd_ccw_req * cqr, char *sense)
110{
111
112 struct dasd_device *device = cqr->device;
113
114 switch (sense[25]) {
115 case 0x00:
116 return dasd_era_none;
117
118 case 0x01:
119 DEV_MESSAGE(KERN_ERR, device, "%s", "EXAMINE 32: fatal error");
120
121 return dasd_era_fatal;
122
123 default:
124
125 return dasd_era_recover;
126 }
127
128} /* end dasd_3990_erp_examine_32 */
129
130/*
131 * DASD_3990_ERP_EXAMINE
132 *
133 * DESCRIPTION
134 * Checks only for fatal/no/recover error.
135 * A detailed examination of the sense data is done later outside
136 * the interrupt handler.
137 *
138 * The logic is based on the 'IBM 3990 Storage Control Reference' manual
139 * 'Chapter 7. Error Recovery Procedures'.
140 *
141 * RETURN VALUES
142 * dasd_era_none no error
143 * dasd_era_fatal for all fatal (unrecoverable errors)
144 * dasd_era_recover for all others.
145 */
146dasd_era_t
147dasd_3990_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
148{
149
150 char *sense = irb->ecw;
151 dasd_era_t era = dasd_era_recover;
152 struct dasd_device *device = cqr->device;
153
154 /* check for successful execution first */
155 if (irb->scsw.cstat == 0x00 &&
156 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
157 return dasd_era_none;
158
159 /* distinguish between 24 and 32 byte sense data */
160 if (sense[27] & DASD_SENSE_BIT_0) {
161
162 era = dasd_3990_erp_examine_24(cqr, sense);
163
164 } else {
165
166 era = dasd_3990_erp_examine_32(cqr, sense);
167
168 }
169
170 /* log the erp chain if fatal error occurred */
171 if ((era == dasd_era_fatal) && (device->state >= DASD_STATE_READY)) {
172 dasd_log_sense(cqr, irb);
173 }
174
175 return era;
176
177} /* END dasd_3990_erp_examine */
178
179/*
180 *****************************************************************************
181 * SECTION ERP HANDLING 29 * SECTION ERP HANDLING
182 ***************************************************************************** 30 *****************************************************************************
183 */ 31 */
@@ -206,7 +54,7 @@ dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
206{ 54{
207 struct dasd_ccw_req *cqr = erp->refers; 55 struct dasd_ccw_req *cqr = erp->refers;
208 56
209 dasd_free_erp_request(erp, erp->device); 57 dasd_free_erp_request(erp, erp->memdev);
210 cqr->status = final_status; 58 cqr->status = final_status;
211 return cqr; 59 return cqr;
212 60
@@ -224,15 +72,17 @@ static void
224dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires) 72dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires)
225{ 73{
226 74
227 struct dasd_device *device = erp->device; 75 struct dasd_device *device = erp->startdev;
76 unsigned long flags;
228 77
229 DEV_MESSAGE(KERN_INFO, device, 78 DEV_MESSAGE(KERN_INFO, device,
230 "blocking request queue for %is", expires/HZ); 79 "blocking request queue for %is", expires/HZ);
231 80
81 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
232 device->stopped |= DASD_STOPPED_PENDING; 82 device->stopped |= DASD_STOPPED_PENDING;
233 erp->status = DASD_CQR_QUEUED; 83 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
234 84 erp->status = DASD_CQR_FILLED;
235 dasd_set_timer(device, expires); 85 dasd_block_set_timer(device->block, expires);
236} 86}
237 87
238/* 88/*
@@ -251,7 +101,7 @@ static struct dasd_ccw_req *
251dasd_3990_erp_int_req(struct dasd_ccw_req * erp) 101dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
252{ 102{
253 103
254 struct dasd_device *device = erp->device; 104 struct dasd_device *device = erp->startdev;
255 105
256 /* first time set initial retry counter and erp_function */ 106 /* first time set initial retry counter and erp_function */
257 /* and retry once without blocking queue */ 107 /* and retry once without blocking queue */
@@ -292,11 +142,14 @@ dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
292static void 142static void
293dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) 143dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
294{ 144{
295 struct dasd_device *device = erp->device; 145 struct dasd_device *device = erp->startdev;
296 __u8 opm; 146 __u8 opm;
147 unsigned long flags;
297 148
298 /* try alternate valid path */ 149 /* try alternate valid path */
150 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
299 opm = ccw_device_get_path_mask(device->cdev); 151 opm = ccw_device_get_path_mask(device->cdev);
152 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
300 //FIXME: start with get_opm ? 153 //FIXME: start with get_opm ?
301 if (erp->lpm == 0) 154 if (erp->lpm == 0)
302 erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum); 155 erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum);
@@ -309,9 +162,8 @@ dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
309 "try alternate lpm=%x (lpum=%x / opm=%x)", 162 "try alternate lpm=%x (lpum=%x / opm=%x)",
310 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); 163 erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
311 164
312 /* reset status to queued to handle the request again... */ 165 /* reset status to submit the request again... */
313 if (erp->status > DASD_CQR_QUEUED) 166 erp->status = DASD_CQR_FILLED;
314 erp->status = DASD_CQR_QUEUED;
315 erp->retries = 1; 167 erp->retries = 1;
316 } else { 168 } else {
317 DEV_MESSAGE(KERN_ERR, device, 169 DEV_MESSAGE(KERN_ERR, device,
@@ -320,8 +172,7 @@ dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
320 erp->irb.esw.esw0.sublog.lpum, opm); 172 erp->irb.esw.esw0.sublog.lpum, opm);
321 173
322 /* post request with permanent error */ 174 /* post request with permanent error */
323 if (erp->status > DASD_CQR_QUEUED) 175 erp->status = DASD_CQR_FAILED;
324 erp->status = DASD_CQR_FAILED;
325 } 176 }
326} /* end dasd_3990_erp_alternate_path */ 177} /* end dasd_3990_erp_alternate_path */
327 178
@@ -344,14 +195,14 @@ static struct dasd_ccw_req *
344dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) 195dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
345{ 196{
346 197
347 struct dasd_device *device = erp->device; 198 struct dasd_device *device = erp->startdev;
348 struct DCTL_data *DCTL_data; 199 struct DCTL_data *DCTL_data;
349 struct ccw1 *ccw; 200 struct ccw1 *ccw;
350 struct dasd_ccw_req *dctl_cqr; 201 struct dasd_ccw_req *dctl_cqr;
351 202
352 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1, 203 dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1,
353 sizeof (struct DCTL_data), 204 sizeof(struct DCTL_data),
354 erp->device); 205 device);
355 if (IS_ERR(dctl_cqr)) { 206 if (IS_ERR(dctl_cqr)) {
356 DEV_MESSAGE(KERN_ERR, device, "%s", 207 DEV_MESSAGE(KERN_ERR, device, "%s",
357 "Unable to allocate DCTL-CQR"); 208 "Unable to allocate DCTL-CQR");
@@ -365,13 +216,14 @@ dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
365 DCTL_data->modifier = modifier; 216 DCTL_data->modifier = modifier;
366 217
367 ccw = dctl_cqr->cpaddr; 218 ccw = dctl_cqr->cpaddr;
368 memset(ccw, 0, sizeof (struct ccw1)); 219 memset(ccw, 0, sizeof(struct ccw1));
369 ccw->cmd_code = CCW_CMD_DCTL; 220 ccw->cmd_code = CCW_CMD_DCTL;
370 ccw->count = 4; 221 ccw->count = 4;
371 ccw->cda = (__u32)(addr_t) DCTL_data; 222 ccw->cda = (__u32)(addr_t) DCTL_data;
372 dctl_cqr->function = dasd_3990_erp_DCTL; 223 dctl_cqr->function = dasd_3990_erp_DCTL;
373 dctl_cqr->refers = erp; 224 dctl_cqr->refers = erp;
374 dctl_cqr->device = erp->device; 225 dctl_cqr->startdev = device;
226 dctl_cqr->memdev = device;
375 dctl_cqr->magic = erp->magic; 227 dctl_cqr->magic = erp->magic;
376 dctl_cqr->expires = 5 * 60 * HZ; 228 dctl_cqr->expires = 5 * 60 * HZ;
377 dctl_cqr->retries = 2; 229 dctl_cqr->retries = 2;
@@ -435,7 +287,7 @@ static struct dasd_ccw_req *
435dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense) 287dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
436{ 288{
437 289
438 struct dasd_device *device = erp->device; 290 struct dasd_device *device = erp->startdev;
439 291
440 /* first time set initial retry counter and erp_function */ 292 /* first time set initial retry counter and erp_function */
441 /* and retry once without waiting for state change pending */ 293 /* and retry once without waiting for state change pending */
@@ -472,7 +324,7 @@ dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
472 "redriving request immediately, " 324 "redriving request immediately, "
473 "%d retries left", 325 "%d retries left",
474 erp->retries); 326 erp->retries);
475 erp->status = DASD_CQR_QUEUED; 327 erp->status = DASD_CQR_FILLED;
476 } 328 }
477 } 329 }
478 330
@@ -530,7 +382,7 @@ static void
530dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense) 382dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
531{ 383{
532 384
533 struct dasd_device *device = erp->device; 385 struct dasd_device *device = erp->startdev;
534 char msg_format = (sense[7] & 0xF0); 386 char msg_format = (sense[7] & 0xF0);
535 char msg_no = (sense[7] & 0x0F); 387 char msg_no = (sense[7] & 0x0F);
536 388
@@ -1157,7 +1009,7 @@ static struct dasd_ccw_req *
1157dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense) 1009dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
1158{ 1010{
1159 1011
1160 struct dasd_device *device = erp->device; 1012 struct dasd_device *device = erp->startdev;
1161 1013
1162 erp->function = dasd_3990_erp_com_rej; 1014 erp->function = dasd_3990_erp_com_rej;
1163 1015
@@ -1198,7 +1050,7 @@ static struct dasd_ccw_req *
1198dasd_3990_erp_bus_out(struct dasd_ccw_req * erp) 1050dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
1199{ 1051{
1200 1052
1201 struct dasd_device *device = erp->device; 1053 struct dasd_device *device = erp->startdev;
1202 1054
1203 /* first time set initial retry counter and erp_function */ 1055 /* first time set initial retry counter and erp_function */
1204 /* and retry once without blocking queue */ 1056 /* and retry once without blocking queue */
@@ -1237,7 +1089,7 @@ static struct dasd_ccw_req *
1237dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense) 1089dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1238{ 1090{
1239 1091
1240 struct dasd_device *device = erp->device; 1092 struct dasd_device *device = erp->startdev;
1241 1093
1242 erp->function = dasd_3990_erp_equip_check; 1094 erp->function = dasd_3990_erp_equip_check;
1243 1095
@@ -1279,7 +1131,6 @@ dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
1279 1131
1280 erp = dasd_3990_erp_action_5(erp); 1132 erp = dasd_3990_erp_action_5(erp);
1281 } 1133 }
1282
1283 return erp; 1134 return erp;
1284 1135
1285} /* end dasd_3990_erp_equip_check */ 1136} /* end dasd_3990_erp_equip_check */
@@ -1299,7 +1150,7 @@ static struct dasd_ccw_req *
1299dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense) 1150dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
1300{ 1151{
1301 1152
1302 struct dasd_device *device = erp->device; 1153 struct dasd_device *device = erp->startdev;
1303 1154
1304 erp->function = dasd_3990_erp_data_check; 1155 erp->function = dasd_3990_erp_data_check;
1305 1156
@@ -1358,7 +1209,7 @@ static struct dasd_ccw_req *
1358dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense) 1209dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
1359{ 1210{
1360 1211
1361 struct dasd_device *device = erp->device; 1212 struct dasd_device *device = erp->startdev;
1362 1213
1363 erp->function = dasd_3990_erp_overrun; 1214 erp->function = dasd_3990_erp_overrun;
1364 1215
@@ -1387,7 +1238,7 @@ static struct dasd_ccw_req *
1387dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense) 1238dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1388{ 1239{
1389 1240
1390 struct dasd_device *device = erp->device; 1241 struct dasd_device *device = erp->startdev;
1391 1242
1392 erp->function = dasd_3990_erp_inv_format; 1243 erp->function = dasd_3990_erp_inv_format;
1393 1244
@@ -1403,8 +1254,7 @@ dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
1403 1254
1404 } else { 1255 } else {
1405 DEV_MESSAGE(KERN_ERR, device, "%s", 1256 DEV_MESSAGE(KERN_ERR, device, "%s",
1406 "Invalid Track Format - Fatal error should have " 1257 "Invalid Track Format - Fatal error");
1407 "been handled within the interrupt handler");
1408 1258
1409 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 1259 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
1410 } 1260 }
@@ -1428,7 +1278,7 @@ static struct dasd_ccw_req *
1428dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense) 1278dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
1429{ 1279{
1430 1280
1431 struct dasd_device *device = default_erp->device; 1281 struct dasd_device *device = default_erp->startdev;
1432 1282
1433 DEV_MESSAGE(KERN_ERR, device, "%s", 1283 DEV_MESSAGE(KERN_ERR, device, "%s",
1434 "End-of-Cylinder - must never happen"); 1284 "End-of-Cylinder - must never happen");
@@ -1453,7 +1303,7 @@ static struct dasd_ccw_req *
1453dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense) 1303dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1454{ 1304{
1455 1305
1456 struct dasd_device *device = erp->device; 1306 struct dasd_device *device = erp->startdev;
1457 1307
1458 erp->function = dasd_3990_erp_env_data; 1308 erp->function = dasd_3990_erp_env_data;
1459 1309
@@ -1463,11 +1313,9 @@ dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
1463 1313
1464 /* don't retry on disabled interface */ 1314 /* don't retry on disabled interface */
1465 if (sense[7] != 0x0F) { 1315 if (sense[7] != 0x0F) {
1466
1467 erp = dasd_3990_erp_action_4(erp, sense); 1316 erp = dasd_3990_erp_action_4(erp, sense);
1468 } else { 1317 } else {
1469 1318 erp->status = DASD_CQR_FILLED;
1470 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_IN_IO);
1471 } 1319 }
1472 1320
1473 return erp; 1321 return erp;
@@ -1490,11 +1338,10 @@ static struct dasd_ccw_req *
1490dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense) 1338dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
1491{ 1339{
1492 1340
1493 struct dasd_device *device = default_erp->device; 1341 struct dasd_device *device = default_erp->startdev;
1494 1342
1495 DEV_MESSAGE(KERN_ERR, device, "%s", 1343 DEV_MESSAGE(KERN_ERR, device, "%s",
1496 "No Record Found - Fatal error should " 1344 "No Record Found - Fatal error ");
1497 "have been handled within the interrupt handler");
1498 1345
1499 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); 1346 return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
1500 1347
@@ -1517,7 +1364,7 @@ static struct dasd_ccw_req *
1517dasd_3990_erp_file_prot(struct dasd_ccw_req * erp) 1364dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1518{ 1365{
1519 1366
1520 struct dasd_device *device = erp->device; 1367 struct dasd_device *device = erp->startdev;
1521 1368
1522 DEV_MESSAGE(KERN_ERR, device, "%s", "File Protected"); 1369 DEV_MESSAGE(KERN_ERR, device, "%s", "File Protected");
1523 1370
@@ -1526,6 +1373,43 @@ dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
1526} /* end dasd_3990_erp_file_prot */ 1373} /* end dasd_3990_erp_file_prot */
1527 1374
1528/* 1375/*
1376 * DASD_3990_ERP_INSPECT_ALIAS
1377 *
1378 * DESCRIPTION
1379 * Checks if the original request was started on an alias device.
1380 * If yes, it modifies the original and the erp request so that
1381 * the erp request can be started on a base device.
1382 *
1383 * PARAMETER
1384 * erp pointer to the currently created default ERP
1385 *
1386 * RETURN VALUES
1387 * erp pointer to the modified ERP, or NULL
1388 */
1389
1390static struct dasd_ccw_req *dasd_3990_erp_inspect_alias(
1391 struct dasd_ccw_req *erp)
1392{
1393 struct dasd_ccw_req *cqr = erp->refers;
1394
1395 if (cqr->block &&
1396 (cqr->block->base != cqr->startdev)) {
1397 if (cqr->startdev->features & DASD_FEATURE_ERPLOG) {
1398 DEV_MESSAGE(KERN_ERR, cqr->startdev,
1399 "ERP on alias device for request %p,"
1400 " recover on base device %s", cqr,
1401 cqr->block->base->cdev->dev.bus_id);
1402 }
1403 dasd_eckd_reset_ccw_to_base_io(cqr);
1404 erp->startdev = cqr->block->base;
1405 erp->function = dasd_3990_erp_inspect_alias;
1406 return erp;
1407 } else
1408 return NULL;
1409}
1410
1411
1412/*
1529 * DASD_3990_ERP_INSPECT_24 1413 * DASD_3990_ERP_INSPECT_24
1530 * 1414 *
1531 * DESCRIPTION 1415 * DESCRIPTION
@@ -1623,7 +1507,7 @@ static struct dasd_ccw_req *
1623dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense) 1507dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
1624{ 1508{
1625 1509
1626 struct dasd_device *device = erp->device; 1510 struct dasd_device *device = erp->startdev;
1627 1511
1628 erp->retries = 256; 1512 erp->retries = 256;
1629 erp->function = dasd_3990_erp_action_10_32; 1513 erp->function = dasd_3990_erp_action_10_32;
@@ -1657,13 +1541,14 @@ static struct dasd_ccw_req *
1657dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) 1541dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1658{ 1542{
1659 1543
1660 struct dasd_device *device = default_erp->device; 1544 struct dasd_device *device = default_erp->startdev;
1661 __u32 cpa = 0; 1545 __u32 cpa = 0;
1662 struct dasd_ccw_req *cqr; 1546 struct dasd_ccw_req *cqr;
1663 struct dasd_ccw_req *erp; 1547 struct dasd_ccw_req *erp;
1664 struct DE_eckd_data *DE_data; 1548 struct DE_eckd_data *DE_data;
1549 struct PFX_eckd_data *PFX_data;
1665 char *LO_data; /* LO_eckd_data_t */ 1550 char *LO_data; /* LO_eckd_data_t */
1666 struct ccw1 *ccw; 1551 struct ccw1 *ccw, *oldccw;
1667 1552
1668 DEV_MESSAGE(KERN_DEBUG, device, "%s", 1553 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1669 "Write not finished because of unexpected condition"); 1554 "Write not finished because of unexpected condition");
@@ -1702,8 +1587,8 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1702 /* Build new ERP request including DE/LO */ 1587 /* Build new ERP request including DE/LO */
1703 erp = dasd_alloc_erp_request((char *) &cqr->magic, 1588 erp = dasd_alloc_erp_request((char *) &cqr->magic,
1704 2 + 1,/* DE/LO + TIC */ 1589 2 + 1,/* DE/LO + TIC */
1705 sizeof (struct DE_eckd_data) + 1590 sizeof(struct DE_eckd_data) +
1706 sizeof (struct LO_eckd_data), device); 1591 sizeof(struct LO_eckd_data), device);
1707 1592
1708 if (IS_ERR(erp)) { 1593 if (IS_ERR(erp)) {
1709 DEV_MESSAGE(KERN_ERR, device, "%s", "Unable to allocate ERP"); 1594 DEV_MESSAGE(KERN_ERR, device, "%s", "Unable to allocate ERP");
@@ -1712,10 +1597,16 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1712 1597
1713 /* use original DE */ 1598 /* use original DE */
1714 DE_data = erp->data; 1599 DE_data = erp->data;
1715 memcpy(DE_data, cqr->data, sizeof (struct DE_eckd_data)); 1600 oldccw = cqr->cpaddr;
1601 if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) {
1602 PFX_data = cqr->data;
1603 memcpy(DE_data, &PFX_data->define_extend,
1604 sizeof(struct DE_eckd_data));
1605 } else
1606 memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data));
1716 1607
1717 /* create LO */ 1608 /* create LO */
1718 LO_data = erp->data + sizeof (struct DE_eckd_data); 1609 LO_data = erp->data + sizeof(struct DE_eckd_data);
1719 1610
1720 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1611 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1721 1612
@@ -1748,7 +1639,7 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1748 1639
1749 /* create DE ccw */ 1640 /* create DE ccw */
1750 ccw = erp->cpaddr; 1641 ccw = erp->cpaddr;
1751 memset(ccw, 0, sizeof (struct ccw1)); 1642 memset(ccw, 0, sizeof(struct ccw1));
1752 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 1643 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
1753 ccw->flags = CCW_FLAG_CC; 1644 ccw->flags = CCW_FLAG_CC;
1754 ccw->count = 16; 1645 ccw->count = 16;
@@ -1756,7 +1647,7 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1756 1647
1757 /* create LO ccw */ 1648 /* create LO ccw */
1758 ccw++; 1649 ccw++;
1759 memset(ccw, 0, sizeof (struct ccw1)); 1650 memset(ccw, 0, sizeof(struct ccw1));
1760 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 1651 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
1761 ccw->flags = CCW_FLAG_CC; 1652 ccw->flags = CCW_FLAG_CC;
1762 ccw->count = 16; 1653 ccw->count = 16;
@@ -1770,7 +1661,8 @@ dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
1770 /* fill erp related fields */ 1661 /* fill erp related fields */
1771 erp->function = dasd_3990_erp_action_1B_32; 1662 erp->function = dasd_3990_erp_action_1B_32;
1772 erp->refers = default_erp->refers; 1663 erp->refers = default_erp->refers;
1773 erp->device = device; 1664 erp->startdev = device;
1665 erp->memdev = device;
1774 erp->magic = default_erp->magic; 1666 erp->magic = default_erp->magic;
1775 erp->expires = 0; 1667 erp->expires = 0;
1776 erp->retries = 256; 1668 erp->retries = 256;
@@ -1803,7 +1695,7 @@ static struct dasd_ccw_req *
1803dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) 1695dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1804{ 1696{
1805 1697
1806 struct dasd_device *device = previous_erp->device; 1698 struct dasd_device *device = previous_erp->startdev;
1807 __u32 cpa = 0; 1699 __u32 cpa = 0;
1808 struct dasd_ccw_req *cqr; 1700 struct dasd_ccw_req *cqr;
1809 struct dasd_ccw_req *erp; 1701 struct dasd_ccw_req *erp;
@@ -1827,7 +1719,7 @@ dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1827 DEV_MESSAGE(KERN_DEBUG, device, "%s", 1719 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1828 "Imprecise ending is set - just retry"); 1720 "Imprecise ending is set - just retry");
1829 1721
1830 previous_erp->status = DASD_CQR_QUEUED; 1722 previous_erp->status = DASD_CQR_FILLED;
1831 1723
1832 return previous_erp; 1724 return previous_erp;
1833 } 1725 }
@@ -1850,7 +1742,7 @@ dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1850 erp = previous_erp; 1742 erp = previous_erp;
1851 1743
1852 /* update the LO with the new returned sense data */ 1744 /* update the LO with the new returned sense data */
1853 LO_data = erp->data + sizeof (struct DE_eckd_data); 1745 LO_data = erp->data + sizeof(struct DE_eckd_data);
1854 1746
1855 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { 1747 if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
1856 1748
@@ -1889,7 +1781,7 @@ dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
1889 ccw++; /* addr of TIC ccw */ 1781 ccw++; /* addr of TIC ccw */
1890 ccw->cda = cpa; 1782 ccw->cda = cpa;
1891 1783
1892 erp->status = DASD_CQR_QUEUED; 1784 erp->status = DASD_CQR_FILLED;
1893 1785
1894 return erp; 1786 return erp;
1895 1787
@@ -1968,9 +1860,7 @@ dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
1968 * try further actions. */ 1860 * try further actions. */
1969 1861
1970 erp->lpm = 0; 1862 erp->lpm = 0;
1971 1863 erp->status = DASD_CQR_NEED_ERP;
1972 erp->status = DASD_CQR_ERROR;
1973
1974 } 1864 }
1975 } 1865 }
1976 1866
@@ -2047,7 +1937,7 @@ dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
2047 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) { 1937 if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
2048 1938
2049 /* set to suspended duplex state then restart */ 1939 /* set to suspended duplex state then restart */
2050 struct dasd_device *device = erp->device; 1940 struct dasd_device *device = erp->startdev;
2051 1941
2052 DEV_MESSAGE(KERN_ERR, device, "%s", 1942 DEV_MESSAGE(KERN_ERR, device, "%s",
2053 "Set device to suspended duplex state should be " 1943 "Set device to suspended duplex state should be "
@@ -2081,28 +1971,26 @@ dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
2081{ 1971{
2082 1972
2083 if ((erp->function == dasd_3990_erp_compound_retry) && 1973 if ((erp->function == dasd_3990_erp_compound_retry) &&
2084 (erp->status == DASD_CQR_ERROR)) { 1974 (erp->status == DASD_CQR_NEED_ERP)) {
2085 1975
2086 dasd_3990_erp_compound_path(erp, sense); 1976 dasd_3990_erp_compound_path(erp, sense);
2087 } 1977 }
2088 1978
2089 if ((erp->function == dasd_3990_erp_compound_path) && 1979 if ((erp->function == dasd_3990_erp_compound_path) &&
2090 (erp->status == DASD_CQR_ERROR)) { 1980 (erp->status == DASD_CQR_NEED_ERP)) {
2091 1981
2092 erp = dasd_3990_erp_compound_code(erp, sense); 1982 erp = dasd_3990_erp_compound_code(erp, sense);
2093 } 1983 }
2094 1984
2095 if ((erp->function == dasd_3990_erp_compound_code) && 1985 if ((erp->function == dasd_3990_erp_compound_code) &&
2096 (erp->status == DASD_CQR_ERROR)) { 1986 (erp->status == DASD_CQR_NEED_ERP)) {
2097 1987
2098 dasd_3990_erp_compound_config(erp, sense); 1988 dasd_3990_erp_compound_config(erp, sense);
2099 } 1989 }
2100 1990
2101 /* if no compound action ERP specified, the request failed */ 1991 /* if no compound action ERP specified, the request failed */
2102 if (erp->status == DASD_CQR_ERROR) { 1992 if (erp->status == DASD_CQR_NEED_ERP)
2103
2104 erp->status = DASD_CQR_FAILED; 1993 erp->status = DASD_CQR_FAILED;
2105 }
2106 1994
2107 return erp; 1995 return erp;
2108 1996
@@ -2127,7 +2015,7 @@ static struct dasd_ccw_req *
2127dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) 2015dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2128{ 2016{
2129 2017
2130 struct dasd_device *device = erp->device; 2018 struct dasd_device *device = erp->startdev;
2131 2019
2132 erp->function = dasd_3990_erp_inspect_32; 2020 erp->function = dasd_3990_erp_inspect_32;
2133 2021
@@ -2149,8 +2037,7 @@ dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
2149 2037
2150 case 0x01: /* fatal error */ 2038 case 0x01: /* fatal error */
2151 DEV_MESSAGE(KERN_ERR, device, "%s", 2039 DEV_MESSAGE(KERN_ERR, device, "%s",
2152 "Fatal error should have been " 2040 "Retry not recommended - Fatal error");
2153 "handled within the interrupt handler");
2154 2041
2155 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); 2042 erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
2156 break; 2043 break;
@@ -2253,6 +2140,11 @@ dasd_3990_erp_inspect(struct dasd_ccw_req * erp)
2253 /* already set up new ERP ! */ 2140 /* already set up new ERP ! */
2254 char *sense = erp->refers->irb.ecw; 2141 char *sense = erp->refers->irb.ecw;
2255 2142
2143 /* if this problem occured on an alias retry on base */
2144 erp_new = dasd_3990_erp_inspect_alias(erp);
2145 if (erp_new)
2146 return erp_new;
2147
2256 /* distinguish between 24 and 32 byte sense data */ 2148 /* distinguish between 24 and 32 byte sense data */
2257 if (sense[27] & DASD_SENSE_BIT_0) { 2149 if (sense[27] & DASD_SENSE_BIT_0) {
2258 2150
@@ -2287,13 +2179,13 @@ static struct dasd_ccw_req *
2287dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr) 2179dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr)
2288{ 2180{
2289 2181
2290 struct dasd_device *device = cqr->device; 2182 struct dasd_device *device = cqr->startdev;
2291 struct ccw1 *ccw; 2183 struct ccw1 *ccw;
2292 2184
2293 /* allocate additional request block */ 2185 /* allocate additional request block */
2294 struct dasd_ccw_req *erp; 2186 struct dasd_ccw_req *erp;
2295 2187
2296 erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, cqr->device); 2188 erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, device);
2297 if (IS_ERR(erp)) { 2189 if (IS_ERR(erp)) {
2298 if (cqr->retries <= 0) { 2190 if (cqr->retries <= 0) {
2299 DEV_MESSAGE(KERN_ERR, device, "%s", 2191 DEV_MESSAGE(KERN_ERR, device, "%s",
@@ -2305,7 +2197,7 @@ dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr)
2305 "Unable to allocate ERP request " 2197 "Unable to allocate ERP request "
2306 "(%i retries left)", 2198 "(%i retries left)",
2307 cqr->retries); 2199 cqr->retries);
2308 dasd_set_timer(device, (HZ << 3)); 2200 dasd_block_set_timer(device->block, (HZ << 3));
2309 } 2201 }
2310 return cqr; 2202 return cqr;
2311 } 2203 }
@@ -2319,7 +2211,9 @@ dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr)
2319 ccw->cda = (long)(cqr->cpaddr); 2211 ccw->cda = (long)(cqr->cpaddr);
2320 erp->function = dasd_3990_erp_add_erp; 2212 erp->function = dasd_3990_erp_add_erp;
2321 erp->refers = cqr; 2213 erp->refers = cqr;
2322 erp->device = cqr->device; 2214 erp->startdev = device;
2215 erp->memdev = device;
2216 erp->block = cqr->block;
2323 erp->magic = cqr->magic; 2217 erp->magic = cqr->magic;
2324 erp->expires = 0; 2218 erp->expires = 0;
2325 erp->retries = 256; 2219 erp->retries = 256;
@@ -2466,7 +2360,7 @@ static struct dasd_ccw_req *
2466dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) 2360dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
2467{ 2361{
2468 2362
2469 struct dasd_device *device = erp->device; 2363 struct dasd_device *device = erp->startdev;
2470 char *sense = erp->irb.ecw; 2364 char *sense = erp->irb.ecw;
2471 2365
2472 /* check for 24 byte sense ERP */ 2366 /* check for 24 byte sense ERP */
@@ -2557,7 +2451,7 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2557 struct dasd_ccw_req *erp) 2451 struct dasd_ccw_req *erp)
2558{ 2452{
2559 2453
2560 struct dasd_device *device = erp_head->device; 2454 struct dasd_device *device = erp_head->startdev;
2561 struct dasd_ccw_req *erp_done = erp_head; /* finished req */ 2455 struct dasd_ccw_req *erp_done = erp_head; /* finished req */
2562 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */ 2456 struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
2563 2457
@@ -2569,13 +2463,13 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2569 "original request was lost\n"); 2463 "original request was lost\n");
2570 2464
2571 /* remove the request from the device queue */ 2465 /* remove the request from the device queue */
2572 list_del(&erp_done->list); 2466 list_del(&erp_done->blocklist);
2573 2467
2574 erp_free = erp_done; 2468 erp_free = erp_done;
2575 erp_done = erp_done->refers; 2469 erp_done = erp_done->refers;
2576 2470
2577 /* free the finished erp request */ 2471 /* free the finished erp request */
2578 dasd_free_erp_request(erp_free, erp_free->device); 2472 dasd_free_erp_request(erp_free, erp_free->memdev);
2579 2473
2580 } /* end while */ 2474 } /* end while */
2581 2475
@@ -2603,7 +2497,7 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2603 erp->retries, erp); 2497 erp->retries, erp);
2604 2498
2605 /* handle the request again... */ 2499 /* handle the request again... */
2606 erp->status = DASD_CQR_QUEUED; 2500 erp->status = DASD_CQR_FILLED;
2607 } 2501 }
2608 2502
2609 } else { 2503 } else {
@@ -2636,9 +2530,8 @@ dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
2636struct dasd_ccw_req * 2530struct dasd_ccw_req *
2637dasd_3990_erp_action(struct dasd_ccw_req * cqr) 2531dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2638{ 2532{
2639
2640 struct dasd_ccw_req *erp = NULL; 2533 struct dasd_ccw_req *erp = NULL;
2641 struct dasd_device *device = cqr->device; 2534 struct dasd_device *device = cqr->startdev;
2642 struct dasd_ccw_req *temp_erp = NULL; 2535 struct dasd_ccw_req *temp_erp = NULL;
2643 2536
2644 if (device->features & DASD_FEATURE_ERPLOG) { 2537 if (device->features & DASD_FEATURE_ERPLOG) {
@@ -2704,10 +2597,11 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr)
2704 } 2597 }
2705 } 2598 }
2706 2599
2707 /* enqueue added ERP request */ 2600 /* enqueue ERP request if it's a new one */
2708 if (erp->status == DASD_CQR_FILLED) { 2601 if (list_empty(&erp->blocklist)) {
2709 erp->status = DASD_CQR_QUEUED; 2602 cqr->status = DASD_CQR_IN_ERP;
2710 list_add(&erp->list, &device->ccw_queue); 2603 /* add erp request before the cqr */
2604 list_add_tail(&erp->blocklist, &cqr->blocklist);
2711 } 2605 }
2712 2606
2713 return erp; 2607 return erp;
diff --git a/drivers/s390/block/dasd_9336_erp.c b/drivers/s390/block/dasd_9336_erp.c
deleted file mode 100644
index 6e082688475a..000000000000
--- a/drivers/s390/block/dasd_9336_erp.c
+++ /dev/null
@@ -1,41 +0,0 @@
1/*
2 * File...........: linux/drivers/s390/block/dasd_9336_erp.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Bugreports.to..: <Linux390@de.ibm.com>
5 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000
6 *
7 */
8
9#define PRINTK_HEADER "dasd_erp(9336)"
10
11#include "dasd_int.h"
12
13
14/*
15 * DASD_9336_ERP_EXAMINE
16 *
17 * DESCRIPTION
18 * Checks only for fatal/no/recover error.
19 * A detailed examination of the sense data is done later outside
20 * the interrupt handler.
21 *
22 * The logic is based on the 'IBM 3880 Storage Control Reference' manual
23 * 'Chapter 7. 9336 Sense Data'.
24 *
25 * RETURN VALUES
26 * dasd_era_none no error
27 * dasd_era_fatal for all fatal (unrecoverable errors)
28 * dasd_era_recover for all others.
29 */
30dasd_era_t
31dasd_9336_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
32{
33 /* check for successful execution first */
34 if (irb->scsw.cstat == 0x00 &&
35 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
36 return dasd_era_none;
37
38 /* examine the 24 byte sense data */
39 return dasd_era_recover;
40
41} /* END dasd_9336_erp_examine */
diff --git a/drivers/s390/block/dasd_9343_erp.c b/drivers/s390/block/dasd_9343_erp.c
deleted file mode 100644
index ddecb9808ed4..000000000000
--- a/drivers/s390/block/dasd_9343_erp.c
+++ /dev/null
@@ -1,21 +0,0 @@
1/*
2 * File...........: linux/drivers/s390/block/dasd_9345_erp.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Bugreports.to..: <Linux390@de.ibm.com>
5 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000
6 *
7 */
8
9#define PRINTK_HEADER "dasd_erp(9343)"
10
11#include "dasd_int.h"
12
13dasd_era_t
14dasd_9343_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
15{
16 if (irb->scsw.cstat == 0x00 &&
17 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
18 return dasd_era_none;
19
20 return dasd_era_recover;
21}
diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c
new file mode 100644
index 000000000000..3a40bee9d358
--- /dev/null
+++ b/drivers/s390/block/dasd_alias.c
@@ -0,0 +1,903 @@
1/*
2 * PAV alias management for the DASD ECKD discipline
3 *
4 * Copyright IBM Corporation, 2007
5 * Author(s): Stefan Weinhuber <wein@de.ibm.com>
6 */
7
8#include <linux/list.h>
9#include <asm/ebcdic.h>
10#include "dasd_int.h"
11#include "dasd_eckd.h"
12
13#ifdef PRINTK_HEADER
14#undef PRINTK_HEADER
15#endif /* PRINTK_HEADER */
16#define PRINTK_HEADER "dasd(eckd):"
17
18
19/*
20 * General concept of alias management:
21 * - PAV and DASD alias management is specific to the eckd discipline.
22 * - A device is connected to an lcu as long as the device exists.
23 * dasd_alias_make_device_known_to_lcu will be called wenn the
24 * device is checked by the eckd discipline and
25 * dasd_alias_disconnect_device_from_lcu will be called
26 * before the device is deleted.
27 * - The dasd_alias_add_device / dasd_alias_remove_device
28 * functions mark the point when a device is 'ready for service'.
29 * - A summary unit check is a rare occasion, but it is mandatory to
30 * support it. It requires some complex recovery actions before the
31 * devices can be used again (see dasd_alias_handle_summary_unit_check).
32 * - dasd_alias_get_start_dev will find an alias device that can be used
33 * instead of the base device and does some (very simple) load balancing.
34 * This is the function that gets called for each I/O, so when improving
35 * something, this function should get faster or better, the rest has just
36 * to be correct.
37 */
38
39
40static void summary_unit_check_handling_work(struct work_struct *);
41static void lcu_update_work(struct work_struct *);
42static int _schedule_lcu_update(struct alias_lcu *, struct dasd_device *);
43
44static struct alias_root aliastree = {
45 .serverlist = LIST_HEAD_INIT(aliastree.serverlist),
46 .lock = __SPIN_LOCK_UNLOCKED(aliastree.lock),
47};
48
49static struct alias_server *_find_server(struct dasd_uid *uid)
50{
51 struct alias_server *pos;
52 list_for_each_entry(pos, &aliastree.serverlist, server) {
53 if (!strncmp(pos->uid.vendor, uid->vendor,
54 sizeof(uid->vendor))
55 && !strncmp(pos->uid.serial, uid->serial,
56 sizeof(uid->serial)))
57 return pos;
58 };
59 return NULL;
60}
61
62static struct alias_lcu *_find_lcu(struct alias_server *server,
63 struct dasd_uid *uid)
64{
65 struct alias_lcu *pos;
66 list_for_each_entry(pos, &server->lculist, lcu) {
67 if (pos->uid.ssid == uid->ssid)
68 return pos;
69 };
70 return NULL;
71}
72
73static struct alias_pav_group *_find_group(struct alias_lcu *lcu,
74 struct dasd_uid *uid)
75{
76 struct alias_pav_group *pos;
77 __u8 search_unit_addr;
78
79 /* for hyper pav there is only one group */
80 if (lcu->pav == HYPER_PAV) {
81 if (list_empty(&lcu->grouplist))
82 return NULL;
83 else
84 return list_first_entry(&lcu->grouplist,
85 struct alias_pav_group, group);
86 }
87
88 /* for base pav we have to find the group that matches the base */
89 if (uid->type == UA_BASE_DEVICE)
90 search_unit_addr = uid->real_unit_addr;
91 else
92 search_unit_addr = uid->base_unit_addr;
93 list_for_each_entry(pos, &lcu->grouplist, group) {
94 if (pos->uid.base_unit_addr == search_unit_addr)
95 return pos;
96 };
97 return NULL;
98}
99
100static struct alias_server *_allocate_server(struct dasd_uid *uid)
101{
102 struct alias_server *server;
103
104 server = kzalloc(sizeof(*server), GFP_KERNEL);
105 if (!server)
106 return ERR_PTR(-ENOMEM);
107 memcpy(server->uid.vendor, uid->vendor, sizeof(uid->vendor));
108 memcpy(server->uid.serial, uid->serial, sizeof(uid->serial));
109 INIT_LIST_HEAD(&server->server);
110 INIT_LIST_HEAD(&server->lculist);
111 return server;
112}
113
114static void _free_server(struct alias_server *server)
115{
116 kfree(server);
117}
118
119static struct alias_lcu *_allocate_lcu(struct dasd_uid *uid)
120{
121 struct alias_lcu *lcu;
122
123 lcu = kzalloc(sizeof(*lcu), GFP_KERNEL);
124 if (!lcu)
125 return ERR_PTR(-ENOMEM);
126 lcu->uac = kzalloc(sizeof(*(lcu->uac)), GFP_KERNEL | GFP_DMA);
127 if (!lcu->uac)
128 goto out_err1;
129 lcu->rsu_cqr = kzalloc(sizeof(*lcu->rsu_cqr), GFP_KERNEL | GFP_DMA);
130 if (!lcu->rsu_cqr)
131 goto out_err2;
132 lcu->rsu_cqr->cpaddr = kzalloc(sizeof(struct ccw1),
133 GFP_KERNEL | GFP_DMA);
134 if (!lcu->rsu_cqr->cpaddr)
135 goto out_err3;
136 lcu->rsu_cqr->data = kzalloc(16, GFP_KERNEL | GFP_DMA);
137 if (!lcu->rsu_cqr->data)
138 goto out_err4;
139
140 memcpy(lcu->uid.vendor, uid->vendor, sizeof(uid->vendor));
141 memcpy(lcu->uid.serial, uid->serial, sizeof(uid->serial));
142 lcu->uid.ssid = uid->ssid;
143 lcu->pav = NO_PAV;
144 lcu->flags = NEED_UAC_UPDATE | UPDATE_PENDING;
145 INIT_LIST_HEAD(&lcu->lcu);
146 INIT_LIST_HEAD(&lcu->inactive_devices);
147 INIT_LIST_HEAD(&lcu->active_devices);
148 INIT_LIST_HEAD(&lcu->grouplist);
149 INIT_WORK(&lcu->suc_data.worker, summary_unit_check_handling_work);
150 INIT_DELAYED_WORK(&lcu->ruac_data.dwork, lcu_update_work);
151 spin_lock_init(&lcu->lock);
152 return lcu;
153
154out_err4:
155 kfree(lcu->rsu_cqr->cpaddr);
156out_err3:
157 kfree(lcu->rsu_cqr);
158out_err2:
159 kfree(lcu->uac);
160out_err1:
161 kfree(lcu);
162 return ERR_PTR(-ENOMEM);
163}
164
165static void _free_lcu(struct alias_lcu *lcu)
166{
167 kfree(lcu->rsu_cqr->data);
168 kfree(lcu->rsu_cqr->cpaddr);
169 kfree(lcu->rsu_cqr);
170 kfree(lcu->uac);
171 kfree(lcu);
172}
173
174/*
175 * This is the function that will allocate all the server and lcu data,
176 * so this function must be called first for a new device.
177 * If the return value is 1, the lcu was already known before, if it
178 * is 0, this is a new lcu.
179 * Negative return code indicates that something went wrong (e.g. -ENOMEM)
180 */
181int dasd_alias_make_device_known_to_lcu(struct dasd_device *device)
182{
183 struct dasd_eckd_private *private;
184 unsigned long flags;
185 struct alias_server *server, *newserver;
186 struct alias_lcu *lcu, *newlcu;
187 int is_lcu_known;
188 struct dasd_uid *uid;
189
190 private = (struct dasd_eckd_private *) device->private;
191 uid = &private->uid;
192 spin_lock_irqsave(&aliastree.lock, flags);
193 is_lcu_known = 1;
194 server = _find_server(uid);
195 if (!server) {
196 spin_unlock_irqrestore(&aliastree.lock, flags);
197 newserver = _allocate_server(uid);
198 if (IS_ERR(newserver))
199 return PTR_ERR(newserver);
200 spin_lock_irqsave(&aliastree.lock, flags);
201 server = _find_server(uid);
202 if (!server) {
203 list_add(&newserver->server, &aliastree.serverlist);
204 server = newserver;
205 is_lcu_known = 0;
206 } else {
207 /* someone was faster */
208 _free_server(newserver);
209 }
210 }
211
212 lcu = _find_lcu(server, uid);
213 if (!lcu) {
214 spin_unlock_irqrestore(&aliastree.lock, flags);
215 newlcu = _allocate_lcu(uid);
216 if (IS_ERR(newlcu))
217 return PTR_ERR(lcu);
218 spin_lock_irqsave(&aliastree.lock, flags);
219 lcu = _find_lcu(server, uid);
220 if (!lcu) {
221 list_add(&newlcu->lcu, &server->lculist);
222 lcu = newlcu;
223 is_lcu_known = 0;
224 } else {
225 /* someone was faster */
226 _free_lcu(newlcu);
227 }
228 is_lcu_known = 0;
229 }
230 spin_lock(&lcu->lock);
231 list_add(&device->alias_list, &lcu->inactive_devices);
232 private->lcu = lcu;
233 spin_unlock(&lcu->lock);
234 spin_unlock_irqrestore(&aliastree.lock, flags);
235
236 return is_lcu_known;
237}
238
239/*
240 * This function removes a device from the scope of alias management.
241 * The complicated part is to make sure that it is not in use by
242 * any of the workers. If necessary cancel the work.
243 */
244void dasd_alias_disconnect_device_from_lcu(struct dasd_device *device)
245{
246 struct dasd_eckd_private *private;
247 unsigned long flags;
248 struct alias_lcu *lcu;
249 struct alias_server *server;
250 int was_pending;
251
252 private = (struct dasd_eckd_private *) device->private;
253 lcu = private->lcu;
254 spin_lock_irqsave(&lcu->lock, flags);
255 list_del_init(&device->alias_list);
256 /* make sure that the workers don't use this device */
257 if (device == lcu->suc_data.device) {
258 spin_unlock_irqrestore(&lcu->lock, flags);
259 cancel_work_sync(&lcu->suc_data.worker);
260 spin_lock_irqsave(&lcu->lock, flags);
261 if (device == lcu->suc_data.device)
262 lcu->suc_data.device = NULL;
263 }
264 was_pending = 0;
265 if (device == lcu->ruac_data.device) {
266 spin_unlock_irqrestore(&lcu->lock, flags);
267 was_pending = 1;
268 cancel_delayed_work_sync(&lcu->ruac_data.dwork);
269 spin_lock_irqsave(&lcu->lock, flags);
270 if (device == lcu->ruac_data.device)
271 lcu->ruac_data.device = NULL;
272 }
273 private->lcu = NULL;
274 spin_unlock_irqrestore(&lcu->lock, flags);
275
276 spin_lock_irqsave(&aliastree.lock, flags);
277 spin_lock(&lcu->lock);
278 if (list_empty(&lcu->grouplist) &&
279 list_empty(&lcu->active_devices) &&
280 list_empty(&lcu->inactive_devices)) {
281 list_del(&lcu->lcu);
282 spin_unlock(&lcu->lock);
283 _free_lcu(lcu);
284 lcu = NULL;
285 } else {
286 if (was_pending)
287 _schedule_lcu_update(lcu, NULL);
288 spin_unlock(&lcu->lock);
289 }
290 server = _find_server(&private->uid);
291 if (server && list_empty(&server->lculist)) {
292 list_del(&server->server);
293 _free_server(server);
294 }
295 spin_unlock_irqrestore(&aliastree.lock, flags);
296}
297
298/*
299 * This function assumes that the unit address configuration stored
300 * in the lcu is up to date and will update the device uid before
301 * adding it to a pav group.
302 */
303static int _add_device_to_lcu(struct alias_lcu *lcu,
304 struct dasd_device *device)
305{
306
307 struct dasd_eckd_private *private;
308 struct alias_pav_group *group;
309 struct dasd_uid *uid;
310
311 private = (struct dasd_eckd_private *) device->private;
312 uid = &private->uid;
313 uid->type = lcu->uac->unit[uid->real_unit_addr].ua_type;
314 uid->base_unit_addr = lcu->uac->unit[uid->real_unit_addr].base_ua;
315 dasd_set_uid(device->cdev, &private->uid);
316
317 /* if we have no PAV anyway, we don't need to bother with PAV groups */
318 if (lcu->pav == NO_PAV) {
319 list_move(&device->alias_list, &lcu->active_devices);
320 return 0;
321 }
322
323 group = _find_group(lcu, uid);
324 if (!group) {
325 group = kzalloc(sizeof(*group), GFP_ATOMIC);
326 if (!group)
327 return -ENOMEM;
328 memcpy(group->uid.vendor, uid->vendor, sizeof(uid->vendor));
329 memcpy(group->uid.serial, uid->serial, sizeof(uid->serial));
330 group->uid.ssid = uid->ssid;
331 if (uid->type == UA_BASE_DEVICE)
332 group->uid.base_unit_addr = uid->real_unit_addr;
333 else
334 group->uid.base_unit_addr = uid->base_unit_addr;
335 INIT_LIST_HEAD(&group->group);
336 INIT_LIST_HEAD(&group->baselist);
337 INIT_LIST_HEAD(&group->aliaslist);
338 list_add(&group->group, &lcu->grouplist);
339 }
340 if (uid->type == UA_BASE_DEVICE)
341 list_move(&device->alias_list, &group->baselist);
342 else
343 list_move(&device->alias_list, &group->aliaslist);
344 private->pavgroup = group;
345 return 0;
346};
347
348static void _remove_device_from_lcu(struct alias_lcu *lcu,
349 struct dasd_device *device)
350{
351 struct dasd_eckd_private *private;
352 struct alias_pav_group *group;
353
354 private = (struct dasd_eckd_private *) device->private;
355 list_move(&device->alias_list, &lcu->inactive_devices);
356 group = private->pavgroup;
357 if (!group)
358 return;
359 private->pavgroup = NULL;
360 if (list_empty(&group->baselist) && list_empty(&group->aliaslist)) {
361 list_del(&group->group);
362 kfree(group);
363 return;
364 }
365 if (group->next == device)
366 group->next = NULL;
367};
368
369static int read_unit_address_configuration(struct dasd_device *device,
370 struct alias_lcu *lcu)
371{
372 struct dasd_psf_prssd_data *prssdp;
373 struct dasd_ccw_req *cqr;
374 struct ccw1 *ccw;
375 int rc;
376 unsigned long flags;
377
378 cqr = dasd_kmalloc_request("ECKD",
379 1 /* PSF */ + 1 /* RSSD */ ,
380 (sizeof(struct dasd_psf_prssd_data)),
381 device);
382 if (IS_ERR(cqr))
383 return PTR_ERR(cqr);
384 cqr->startdev = device;
385 cqr->memdev = device;
386 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
387 cqr->retries = 10;
388 cqr->expires = 20 * HZ;
389
390 /* Prepare for Read Subsystem Data */
391 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
392 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
393 prssdp->order = PSF_ORDER_PRSSD;
394 prssdp->suborder = 0x0e; /* Read unit address configuration */
395 /* all other bytes of prssdp must be zero */
396
397 ccw = cqr->cpaddr;
398 ccw->cmd_code = DASD_ECKD_CCW_PSF;
399 ccw->count = sizeof(struct dasd_psf_prssd_data);
400 ccw->flags |= CCW_FLAG_CC;
401 ccw->cda = (__u32)(addr_t) prssdp;
402
403 /* Read Subsystem Data - feature codes */
404 memset(lcu->uac, 0, sizeof(*(lcu->uac)));
405
406 ccw++;
407 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
408 ccw->count = sizeof(*(lcu->uac));
409 ccw->cda = (__u32)(addr_t) lcu->uac;
410
411 cqr->buildclk = get_clock();
412 cqr->status = DASD_CQR_FILLED;
413
414 /* need to unset flag here to detect race with summary unit check */
415 spin_lock_irqsave(&lcu->lock, flags);
416 lcu->flags &= ~NEED_UAC_UPDATE;
417 spin_unlock_irqrestore(&lcu->lock, flags);
418
419 do {
420 rc = dasd_sleep_on(cqr);
421 } while (rc && (cqr->retries > 0));
422 if (rc) {
423 spin_lock_irqsave(&lcu->lock, flags);
424 lcu->flags |= NEED_UAC_UPDATE;
425 spin_unlock_irqrestore(&lcu->lock, flags);
426 }
427 dasd_kfree_request(cqr, cqr->memdev);
428 return rc;
429}
430
431static int _lcu_update(struct dasd_device *refdev, struct alias_lcu *lcu)
432{
433 unsigned long flags;
434 struct alias_pav_group *pavgroup, *tempgroup;
435 struct dasd_device *device, *tempdev;
436 int i, rc;
437 struct dasd_eckd_private *private;
438
439 spin_lock_irqsave(&lcu->lock, flags);
440 list_for_each_entry_safe(pavgroup, tempgroup, &lcu->grouplist, group) {
441 list_for_each_entry_safe(device, tempdev, &pavgroup->baselist,
442 alias_list) {
443 list_move(&device->alias_list, &lcu->active_devices);
444 private = (struct dasd_eckd_private *) device->private;
445 private->pavgroup = NULL;
446 }
447 list_for_each_entry_safe(device, tempdev, &pavgroup->aliaslist,
448 alias_list) {
449 list_move(&device->alias_list, &lcu->active_devices);
450 private = (struct dasd_eckd_private *) device->private;
451 private->pavgroup = NULL;
452 }
453 list_del(&pavgroup->group);
454 kfree(pavgroup);
455 }
456 spin_unlock_irqrestore(&lcu->lock, flags);
457
458 rc = read_unit_address_configuration(refdev, lcu);
459 if (rc)
460 return rc;
461
462 spin_lock_irqsave(&lcu->lock, flags);
463 lcu->pav = NO_PAV;
464 for (i = 0; i < MAX_DEVICES_PER_LCU; ++i) {
465 switch (lcu->uac->unit[i].ua_type) {
466 case UA_BASE_PAV_ALIAS:
467 lcu->pav = BASE_PAV;
468 break;
469 case UA_HYPER_PAV_ALIAS:
470 lcu->pav = HYPER_PAV;
471 break;
472 }
473 if (lcu->pav != NO_PAV)
474 break;
475 }
476
477 list_for_each_entry_safe(device, tempdev, &lcu->active_devices,
478 alias_list) {
479 _add_device_to_lcu(lcu, device);
480 }
481 spin_unlock_irqrestore(&lcu->lock, flags);
482 return 0;
483}
484
485static void lcu_update_work(struct work_struct *work)
486{
487 struct alias_lcu *lcu;
488 struct read_uac_work_data *ruac_data;
489 struct dasd_device *device;
490 unsigned long flags;
491 int rc;
492
493 ruac_data = container_of(work, struct read_uac_work_data, dwork.work);
494 lcu = container_of(ruac_data, struct alias_lcu, ruac_data);
495 device = ruac_data->device;
496 rc = _lcu_update(device, lcu);
497 /*
498 * Need to check flags again, as there could have been another
499 * prepare_update or a new device a new device while we were still
500 * processing the data
501 */
502 spin_lock_irqsave(&lcu->lock, flags);
503 if (rc || (lcu->flags & NEED_UAC_UPDATE)) {
504 DEV_MESSAGE(KERN_WARNING, device, "could not update"
505 " alias data in lcu (rc = %d), retry later", rc);
506 schedule_delayed_work(&lcu->ruac_data.dwork, 30*HZ);
507 } else {
508 lcu->ruac_data.device = NULL;
509 lcu->flags &= ~UPDATE_PENDING;
510 }
511 spin_unlock_irqrestore(&lcu->lock, flags);
512}
513
514static int _schedule_lcu_update(struct alias_lcu *lcu,
515 struct dasd_device *device)
516{
517 struct dasd_device *usedev = NULL;
518 struct alias_pav_group *group;
519
520 lcu->flags |= NEED_UAC_UPDATE;
521 if (lcu->ruac_data.device) {
522 /* already scheduled or running */
523 return 0;
524 }
525 if (device && !list_empty(&device->alias_list))
526 usedev = device;
527
528 if (!usedev && !list_empty(&lcu->grouplist)) {
529 group = list_first_entry(&lcu->grouplist,
530 struct alias_pav_group, group);
531 if (!list_empty(&group->baselist))
532 usedev = list_first_entry(&group->baselist,
533 struct dasd_device,
534 alias_list);
535 else if (!list_empty(&group->aliaslist))
536 usedev = list_first_entry(&group->aliaslist,
537 struct dasd_device,
538 alias_list);
539 }
540 if (!usedev && !list_empty(&lcu->active_devices)) {
541 usedev = list_first_entry(&lcu->active_devices,
542 struct dasd_device, alias_list);
543 }
544 /*
545 * if we haven't found a proper device yet, give up for now, the next
546 * device that will be set active will trigger an lcu update
547 */
548 if (!usedev)
549 return -EINVAL;
550 lcu->ruac_data.device = usedev;
551 schedule_delayed_work(&lcu->ruac_data.dwork, 0);
552 return 0;
553}
554
555int dasd_alias_add_device(struct dasd_device *device)
556{
557 struct dasd_eckd_private *private;
558 struct alias_lcu *lcu;
559 unsigned long flags;
560 int rc;
561
562 private = (struct dasd_eckd_private *) device->private;
563 lcu = private->lcu;
564 rc = 0;
565 spin_lock_irqsave(&lcu->lock, flags);
566 if (!(lcu->flags & UPDATE_PENDING)) {
567 rc = _add_device_to_lcu(lcu, device);
568 if (rc)
569 lcu->flags |= UPDATE_PENDING;
570 }
571 if (lcu->flags & UPDATE_PENDING) {
572 list_move(&device->alias_list, &lcu->active_devices);
573 _schedule_lcu_update(lcu, device);
574 }
575 spin_unlock_irqrestore(&lcu->lock, flags);
576 return rc;
577}
578
579int dasd_alias_remove_device(struct dasd_device *device)
580{
581 struct dasd_eckd_private *private;
582 struct alias_lcu *lcu;
583 unsigned long flags;
584
585 private = (struct dasd_eckd_private *) device->private;
586 lcu = private->lcu;
587 spin_lock_irqsave(&lcu->lock, flags);
588 _remove_device_from_lcu(lcu, device);
589 spin_unlock_irqrestore(&lcu->lock, flags);
590 return 0;
591}
592
593struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device)
594{
595
596 struct dasd_device *alias_device;
597 struct alias_pav_group *group;
598 struct alias_lcu *lcu;
599 struct dasd_eckd_private *private, *alias_priv;
600 unsigned long flags;
601
602 private = (struct dasd_eckd_private *) base_device->private;
603 group = private->pavgroup;
604 lcu = private->lcu;
605 if (!group || !lcu)
606 return NULL;
607 if (lcu->pav == NO_PAV ||
608 lcu->flags & (NEED_UAC_UPDATE | UPDATE_PENDING))
609 return NULL;
610
611 spin_lock_irqsave(&lcu->lock, flags);
612 alias_device = group->next;
613 if (!alias_device) {
614 if (list_empty(&group->aliaslist)) {
615 spin_unlock_irqrestore(&lcu->lock, flags);
616 return NULL;
617 } else {
618 alias_device = list_first_entry(&group->aliaslist,
619 struct dasd_device,
620 alias_list);
621 }
622 }
623 if (list_is_last(&alias_device->alias_list, &group->aliaslist))
624 group->next = list_first_entry(&group->aliaslist,
625 struct dasd_device, alias_list);
626 else
627 group->next = list_first_entry(&alias_device->alias_list,
628 struct dasd_device, alias_list);
629 spin_unlock_irqrestore(&lcu->lock, flags);
630 alias_priv = (struct dasd_eckd_private *) alias_device->private;
631 if ((alias_priv->count < private->count) && !alias_device->stopped)
632 return alias_device;
633 else
634 return NULL;
635}
636
637/*
638 * Summary unit check handling depends on the way alias devices
639 * are handled so it is done here rather then in dasd_eckd.c
640 */
641static int reset_summary_unit_check(struct alias_lcu *lcu,
642 struct dasd_device *device,
643 char reason)
644{
645 struct dasd_ccw_req *cqr;
646 int rc = 0;
647
648 cqr = lcu->rsu_cqr;
649 strncpy((char *) &cqr->magic, "ECKD", 4);
650 ASCEBC((char *) &cqr->magic, 4);
651 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RSCK;
652 cqr->cpaddr->flags = 0 ;
653 cqr->cpaddr->count = 16;
654 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
655 ((char *)cqr->data)[0] = reason;
656
657 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
658 cqr->retries = 255; /* set retry counter to enable basic ERP */
659 cqr->startdev = device;
660 cqr->memdev = device;
661 cqr->block = NULL;
662 cqr->expires = 5 * HZ;
663 cqr->buildclk = get_clock();
664 cqr->status = DASD_CQR_FILLED;
665
666 rc = dasd_sleep_on_immediatly(cqr);
667 return rc;
668}
669
670static void _restart_all_base_devices_on_lcu(struct alias_lcu *lcu)
671{
672 struct alias_pav_group *pavgroup;
673 struct dasd_device *device;
674 struct dasd_eckd_private *private;
675
676 /* active and inactive list can contain alias as well as base devices */
677 list_for_each_entry(device, &lcu->active_devices, alias_list) {
678 private = (struct dasd_eckd_private *) device->private;
679 if (private->uid.type != UA_BASE_DEVICE)
680 continue;
681 dasd_schedule_block_bh(device->block);
682 dasd_schedule_device_bh(device);
683 }
684 list_for_each_entry(device, &lcu->inactive_devices, alias_list) {
685 private = (struct dasd_eckd_private *) device->private;
686 if (private->uid.type != UA_BASE_DEVICE)
687 continue;
688 dasd_schedule_block_bh(device->block);
689 dasd_schedule_device_bh(device);
690 }
691 list_for_each_entry(pavgroup, &lcu->grouplist, group) {
692 list_for_each_entry(device, &pavgroup->baselist, alias_list) {
693 dasd_schedule_block_bh(device->block);
694 dasd_schedule_device_bh(device);
695 }
696 }
697}
698
699static void flush_all_alias_devices_on_lcu(struct alias_lcu *lcu)
700{
701 struct alias_pav_group *pavgroup;
702 struct dasd_device *device, *temp;
703 struct dasd_eckd_private *private;
704 int rc;
705 unsigned long flags;
706 LIST_HEAD(active);
707
708 /*
709 * Problem here ist that dasd_flush_device_queue may wait
710 * for termination of a request to complete. We can't keep
711 * the lcu lock during that time, so we must assume that
712 * the lists may have changed.
713 * Idea: first gather all active alias devices in a separate list,
714 * then flush the first element of this list unlocked, and afterwards
715 * check if it is still on the list before moving it to the
716 * active_devices list.
717 */
718
719 spin_lock_irqsave(&lcu->lock, flags);
720 list_for_each_entry_safe(device, temp, &lcu->active_devices,
721 alias_list) {
722 private = (struct dasd_eckd_private *) device->private;
723 if (private->uid.type == UA_BASE_DEVICE)
724 continue;
725 list_move(&device->alias_list, &active);
726 }
727
728 list_for_each_entry(pavgroup, &lcu->grouplist, group) {
729 list_splice_init(&pavgroup->aliaslist, &active);
730 }
731 while (!list_empty(&active)) {
732 device = list_first_entry(&active, struct dasd_device,
733 alias_list);
734 spin_unlock_irqrestore(&lcu->lock, flags);
735 rc = dasd_flush_device_queue(device);
736 spin_lock_irqsave(&lcu->lock, flags);
737 /*
738 * only move device around if it wasn't moved away while we
739 * were waiting for the flush
740 */
741 if (device == list_first_entry(&active,
742 struct dasd_device, alias_list))
743 list_move(&device->alias_list, &lcu->active_devices);
744 }
745 spin_unlock_irqrestore(&lcu->lock, flags);
746}
747
748/*
749 * This function is called in interrupt context, so the
750 * cdev lock for device is already locked!
751 */
752static void _stop_all_devices_on_lcu(struct alias_lcu *lcu,
753 struct dasd_device *device)
754{
755 struct alias_pav_group *pavgroup;
756 struct dasd_device *pos;
757
758 list_for_each_entry(pos, &lcu->active_devices, alias_list) {
759 if (pos != device)
760 spin_lock(get_ccwdev_lock(pos->cdev));
761 pos->stopped |= DASD_STOPPED_SU;
762 if (pos != device)
763 spin_unlock(get_ccwdev_lock(pos->cdev));
764 }
765 list_for_each_entry(pos, &lcu->inactive_devices, alias_list) {
766 if (pos != device)
767 spin_lock(get_ccwdev_lock(pos->cdev));
768 pos->stopped |= DASD_STOPPED_SU;
769 if (pos != device)
770 spin_unlock(get_ccwdev_lock(pos->cdev));
771 }
772 list_for_each_entry(pavgroup, &lcu->grouplist, group) {
773 list_for_each_entry(pos, &pavgroup->baselist, alias_list) {
774 if (pos != device)
775 spin_lock(get_ccwdev_lock(pos->cdev));
776 pos->stopped |= DASD_STOPPED_SU;
777 if (pos != device)
778 spin_unlock(get_ccwdev_lock(pos->cdev));
779 }
780 list_for_each_entry(pos, &pavgroup->aliaslist, alias_list) {
781 if (pos != device)
782 spin_lock(get_ccwdev_lock(pos->cdev));
783 pos->stopped |= DASD_STOPPED_SU;
784 if (pos != device)
785 spin_unlock(get_ccwdev_lock(pos->cdev));
786 }
787 }
788}
789
790static void _unstop_all_devices_on_lcu(struct alias_lcu *lcu)
791{
792 struct alias_pav_group *pavgroup;
793 struct dasd_device *device;
794 unsigned long flags;
795
796 list_for_each_entry(device, &lcu->active_devices, alias_list) {
797 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
798 device->stopped &= ~DASD_STOPPED_SU;
799 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
800 }
801
802 list_for_each_entry(device, &lcu->inactive_devices, alias_list) {
803 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
804 device->stopped &= ~DASD_STOPPED_SU;
805 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
806 }
807
808 list_for_each_entry(pavgroup, &lcu->grouplist, group) {
809 list_for_each_entry(device, &pavgroup->baselist, alias_list) {
810 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
811 device->stopped &= ~DASD_STOPPED_SU;
812 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
813 flags);
814 }
815 list_for_each_entry(device, &pavgroup->aliaslist, alias_list) {
816 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
817 device->stopped &= ~DASD_STOPPED_SU;
818 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
819 flags);
820 }
821 }
822}
823
824static void summary_unit_check_handling_work(struct work_struct *work)
825{
826 struct alias_lcu *lcu;
827 struct summary_unit_check_work_data *suc_data;
828 unsigned long flags;
829 struct dasd_device *device;
830
831 suc_data = container_of(work, struct summary_unit_check_work_data,
832 worker);
833 lcu = container_of(suc_data, struct alias_lcu, suc_data);
834 device = suc_data->device;
835
836 /* 1. flush alias devices */
837 flush_all_alias_devices_on_lcu(lcu);
838
839 /* 2. reset summary unit check */
840 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
841 device->stopped &= ~(DASD_STOPPED_SU | DASD_STOPPED_PENDING);
842 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
843 reset_summary_unit_check(lcu, device, suc_data->reason);
844
845 spin_lock_irqsave(&lcu->lock, flags);
846 _unstop_all_devices_on_lcu(lcu);
847 _restart_all_base_devices_on_lcu(lcu);
848 /* 3. read new alias configuration */
849 _schedule_lcu_update(lcu, device);
850 lcu->suc_data.device = NULL;
851 spin_unlock_irqrestore(&lcu->lock, flags);
852}
853
854/*
855 * note: this will be called from int handler context (cdev locked)
856 */
857void dasd_alias_handle_summary_unit_check(struct dasd_device *device,
858 struct irb *irb)
859{
860 struct alias_lcu *lcu;
861 char reason;
862 struct dasd_eckd_private *private;
863
864 private = (struct dasd_eckd_private *) device->private;
865
866 reason = irb->ecw[8];
867 DEV_MESSAGE(KERN_WARNING, device, "%s %x",
868 "eckd handle summary unit check: reason", reason);
869
870 lcu = private->lcu;
871 if (!lcu) {
872 DEV_MESSAGE(KERN_WARNING, device, "%s",
873 "device not ready to handle summary"
874 " unit check (no lcu structure)");
875 return;
876 }
877 spin_lock(&lcu->lock);
878 _stop_all_devices_on_lcu(lcu, device);
879 /* prepare for lcu_update */
880 private->lcu->flags |= NEED_UAC_UPDATE | UPDATE_PENDING;
881 /* If this device is about to be removed just return and wait for
882 * the next interrupt on a different device
883 */
884 if (list_empty(&device->alias_list)) {
885 DEV_MESSAGE(KERN_WARNING, device, "%s",
886 "device is in offline processing,"
887 " don't do summary unit check handling");
888 spin_unlock(&lcu->lock);
889 return;
890 }
891 if (lcu->suc_data.device) {
892 /* already scheduled or running */
893 DEV_MESSAGE(KERN_WARNING, device, "%s",
894 "previous instance of summary unit check worker"
895 " still pending");
896 spin_unlock(&lcu->lock);
897 return ;
898 }
899 lcu->suc_data.reason = reason;
900 lcu->suc_data.device = device;
901 spin_unlock(&lcu->lock);
902 schedule_work(&lcu->suc_data.worker);
903};
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 0c67258fb9ec..f4fb40257348 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -49,22 +49,6 @@ struct dasd_devmap {
49}; 49};
50 50
51/* 51/*
52 * dasd_server_ssid_map contains a globally unique storage server subsystem ID.
53 * dasd_server_ssid_list contains the list of all subsystem IDs accessed by
54 * the DASD device driver.
55 */
56struct dasd_server_ssid_map {
57 struct list_head list;
58 struct system_id {
59 char vendor[4];
60 char serial[15];
61 __u16 ssid;
62 } sid;
63};
64
65static struct list_head dasd_server_ssid_list;
66
67/*
68 * Parameter parsing functions for dasd= parameter. The syntax is: 52 * Parameter parsing functions for dasd= parameter. The syntax is:
69 * <devno> : (0x)?[0-9a-fA-F]+ 53 * <devno> : (0x)?[0-9a-fA-F]+
70 * <busid> : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+ 54 * <busid> : [0-0a-f]\.[0-9a-f]\.(0x)?[0-9a-fA-F]+
@@ -721,8 +705,9 @@ dasd_ro_store(struct device *dev, struct device_attribute *attr,
721 devmap->features &= ~DASD_FEATURE_READONLY; 705 devmap->features &= ~DASD_FEATURE_READONLY;
722 if (devmap->device) 706 if (devmap->device)
723 devmap->device->features = devmap->features; 707 devmap->device->features = devmap->features;
724 if (devmap->device && devmap->device->gdp) 708 if (devmap->device && devmap->device->block
725 set_disk_ro(devmap->device->gdp, val); 709 && devmap->device->block->gdp)
710 set_disk_ro(devmap->device->block->gdp, val);
726 spin_unlock(&dasd_devmap_lock); 711 spin_unlock(&dasd_devmap_lock);
727 return count; 712 return count;
728} 713}
@@ -893,12 +878,16 @@ dasd_alias_show(struct device *dev, struct device_attribute *attr, char *buf)
893 878
894 devmap = dasd_find_busid(dev->bus_id); 879 devmap = dasd_find_busid(dev->bus_id);
895 spin_lock(&dasd_devmap_lock); 880 spin_lock(&dasd_devmap_lock);
896 if (!IS_ERR(devmap)) 881 if (IS_ERR(devmap) || strlen(devmap->uid.vendor) == 0) {
897 alias = devmap->uid.alias; 882 spin_unlock(&dasd_devmap_lock);
883 return sprintf(buf, "0\n");
884 }
885 if (devmap->uid.type == UA_BASE_PAV_ALIAS ||
886 devmap->uid.type == UA_HYPER_PAV_ALIAS)
887 alias = 1;
898 else 888 else
899 alias = 0; 889 alias = 0;
900 spin_unlock(&dasd_devmap_lock); 890 spin_unlock(&dasd_devmap_lock);
901
902 return sprintf(buf, alias ? "1\n" : "0\n"); 891 return sprintf(buf, alias ? "1\n" : "0\n");
903} 892}
904 893
@@ -930,19 +919,36 @@ static ssize_t
930dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf) 919dasd_uid_show(struct device *dev, struct device_attribute *attr, char *buf)
931{ 920{
932 struct dasd_devmap *devmap; 921 struct dasd_devmap *devmap;
933 char uid[UID_STRLEN]; 922 char uid_string[UID_STRLEN];
923 char ua_string[3];
924 struct dasd_uid *uid;
934 925
935 devmap = dasd_find_busid(dev->bus_id); 926 devmap = dasd_find_busid(dev->bus_id);
936 spin_lock(&dasd_devmap_lock); 927 spin_lock(&dasd_devmap_lock);
937 if (!IS_ERR(devmap) && strlen(devmap->uid.vendor) > 0) 928 if (IS_ERR(devmap) || strlen(devmap->uid.vendor) == 0) {
938 snprintf(uid, sizeof(uid), "%s.%s.%04x.%02x", 929 spin_unlock(&dasd_devmap_lock);
939 devmap->uid.vendor, devmap->uid.serial, 930 return sprintf(buf, "\n");
940 devmap->uid.ssid, devmap->uid.unit_addr); 931 }
941 else 932 uid = &devmap->uid;
942 uid[0] = 0; 933 switch (uid->type) {
934 case UA_BASE_DEVICE:
935 sprintf(ua_string, "%02x", uid->real_unit_addr);
936 break;
937 case UA_BASE_PAV_ALIAS:
938 sprintf(ua_string, "%02x", uid->base_unit_addr);
939 break;
940 case UA_HYPER_PAV_ALIAS:
941 sprintf(ua_string, "xx");
942 break;
943 default:
944 /* should not happen, treat like base device */
945 sprintf(ua_string, "%02x", uid->real_unit_addr);
946 break;
947 }
948 snprintf(uid_string, sizeof(uid_string), "%s.%s.%04x.%s",
949 uid->vendor, uid->serial, uid->ssid, ua_string);
943 spin_unlock(&dasd_devmap_lock); 950 spin_unlock(&dasd_devmap_lock);
944 951 return snprintf(buf, PAGE_SIZE, "%s\n", uid_string);
945 return snprintf(buf, PAGE_SIZE, "%s\n", uid);
946} 952}
947 953
948static DEVICE_ATTR(uid, 0444, dasd_uid_show, NULL); 954static DEVICE_ATTR(uid, 0444, dasd_uid_show, NULL);
@@ -1040,39 +1046,16 @@ int
1040dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid) 1046dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid)
1041{ 1047{
1042 struct dasd_devmap *devmap; 1048 struct dasd_devmap *devmap;
1043 struct dasd_server_ssid_map *srv, *tmp;
1044 1049
1045 devmap = dasd_find_busid(cdev->dev.bus_id); 1050 devmap = dasd_find_busid(cdev->dev.bus_id);
1046 if (IS_ERR(devmap)) 1051 if (IS_ERR(devmap))
1047 return PTR_ERR(devmap); 1052 return PTR_ERR(devmap);
1048 1053
1049 /* generate entry for server_ssid_map */
1050 srv = (struct dasd_server_ssid_map *)
1051 kzalloc(sizeof(struct dasd_server_ssid_map), GFP_KERNEL);
1052 if (!srv)
1053 return -ENOMEM;
1054 strncpy(srv->sid.vendor, uid->vendor, sizeof(srv->sid.vendor) - 1);
1055 strncpy(srv->sid.serial, uid->serial, sizeof(srv->sid.serial) - 1);
1056 srv->sid.ssid = uid->ssid;
1057
1058 /* server is already contained ? */
1059 spin_lock(&dasd_devmap_lock); 1054 spin_lock(&dasd_devmap_lock);
1060 devmap->uid = *uid; 1055 devmap->uid = *uid;
1061 list_for_each_entry(tmp, &dasd_server_ssid_list, list) {
1062 if (!memcmp(&srv->sid, &tmp->sid,
1063 sizeof(struct system_id))) {
1064 kfree(srv);
1065 srv = NULL;
1066 break;
1067 }
1068 }
1069
1070 /* add servermap to serverlist */
1071 if (srv)
1072 list_add(&srv->list, &dasd_server_ssid_list);
1073 spin_unlock(&dasd_devmap_lock); 1056 spin_unlock(&dasd_devmap_lock);
1074 1057
1075 return (srv ? 1 : 0); 1058 return 0;
1076} 1059}
1077EXPORT_SYMBOL_GPL(dasd_set_uid); 1060EXPORT_SYMBOL_GPL(dasd_set_uid);
1078 1061
@@ -1138,9 +1121,6 @@ dasd_devmap_init(void)
1138 dasd_max_devindex = 0; 1121 dasd_max_devindex = 0;
1139 for (i = 0; i < 256; i++) 1122 for (i = 0; i < 256; i++)
1140 INIT_LIST_HEAD(&dasd_hashlists[i]); 1123 INIT_LIST_HEAD(&dasd_hashlists[i]);
1141
1142 /* Initialize servermap structure. */
1143 INIT_LIST_HEAD(&dasd_server_ssid_list);
1144 return 0; 1124 return 0;
1145} 1125}
1146 1126
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index 571320ab9e1a..d91df38ee4f7 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -142,7 +142,7 @@ dasd_diag_erp(struct dasd_device *device)
142 int rc; 142 int rc;
143 143
144 mdsk_term_io(device); 144 mdsk_term_io(device);
145 rc = mdsk_init_io(device, device->bp_block, 0, NULL); 145 rc = mdsk_init_io(device, device->block->bp_block, 0, NULL);
146 if (rc) 146 if (rc)
147 DEV_MESSAGE(KERN_WARNING, device, "DIAG ERP unsuccessful, " 147 DEV_MESSAGE(KERN_WARNING, device, "DIAG ERP unsuccessful, "
148 "rc=%d", rc); 148 "rc=%d", rc);
@@ -158,11 +158,11 @@ dasd_start_diag(struct dasd_ccw_req * cqr)
158 struct dasd_diag_req *dreq; 158 struct dasd_diag_req *dreq;
159 int rc; 159 int rc;
160 160
161 device = cqr->device; 161 device = cqr->startdev;
162 if (cqr->retries < 0) { 162 if (cqr->retries < 0) {
163 DEV_MESSAGE(KERN_WARNING, device, "DIAG start_IO: request %p " 163 DEV_MESSAGE(KERN_WARNING, device, "DIAG start_IO: request %p "
164 "- no retry left)", cqr); 164 "- no retry left)", cqr);
165 cqr->status = DASD_CQR_FAILED; 165 cqr->status = DASD_CQR_ERROR;
166 return -EIO; 166 return -EIO;
167 } 167 }
168 private = (struct dasd_diag_private *) device->private; 168 private = (struct dasd_diag_private *) device->private;
@@ -184,7 +184,7 @@ dasd_start_diag(struct dasd_ccw_req * cqr)
184 switch (rc) { 184 switch (rc) {
185 case 0: /* Synchronous I/O finished successfully */ 185 case 0: /* Synchronous I/O finished successfully */
186 cqr->stopclk = get_clock(); 186 cqr->stopclk = get_clock();
187 cqr->status = DASD_CQR_DONE; 187 cqr->status = DASD_CQR_SUCCESS;
188 /* Indicate to calling function that only a dasd_schedule_bh() 188 /* Indicate to calling function that only a dasd_schedule_bh()
189 and no timer is needed */ 189 and no timer is needed */
190 rc = -EACCES; 190 rc = -EACCES;
@@ -209,12 +209,12 @@ dasd_diag_term_IO(struct dasd_ccw_req * cqr)
209{ 209{
210 struct dasd_device *device; 210 struct dasd_device *device;
211 211
212 device = cqr->device; 212 device = cqr->startdev;
213 mdsk_term_io(device); 213 mdsk_term_io(device);
214 mdsk_init_io(device, device->bp_block, 0, NULL); 214 mdsk_init_io(device, device->block->bp_block, 0, NULL);
215 cqr->status = DASD_CQR_CLEAR; 215 cqr->status = DASD_CQR_CLEAR_PENDING;
216 cqr->stopclk = get_clock(); 216 cqr->stopclk = get_clock();
217 dasd_schedule_bh(device); 217 dasd_schedule_device_bh(device);
218 return 0; 218 return 0;
219} 219}
220 220
@@ -247,7 +247,7 @@ dasd_ext_handler(__u16 code)
247 return; 247 return;
248 } 248 }
249 cqr = (struct dasd_ccw_req *) ip; 249 cqr = (struct dasd_ccw_req *) ip;
250 device = (struct dasd_device *) cqr->device; 250 device = (struct dasd_device *) cqr->startdev;
251 if (strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) { 251 if (strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
252 DEV_MESSAGE(KERN_WARNING, device, 252 DEV_MESSAGE(KERN_WARNING, device,
253 " magic number of dasd_ccw_req 0x%08X doesn't" 253 " magic number of dasd_ccw_req 0x%08X doesn't"
@@ -260,10 +260,10 @@ dasd_ext_handler(__u16 code)
260 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 260 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
261 261
262 /* Check for a pending clear operation */ 262 /* Check for a pending clear operation */
263 if (cqr->status == DASD_CQR_CLEAR) { 263 if (cqr->status == DASD_CQR_CLEAR_PENDING) {
264 cqr->status = DASD_CQR_QUEUED; 264 cqr->status = DASD_CQR_CLEARED;
265 dasd_clear_timer(device); 265 dasd_device_clear_timer(device);
266 dasd_schedule_bh(device); 266 dasd_schedule_device_bh(device);
267 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 267 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
268 return; 268 return;
269 } 269 }
@@ -272,11 +272,11 @@ dasd_ext_handler(__u16 code)
272 272
273 expires = 0; 273 expires = 0;
274 if (status == 0) { 274 if (status == 0) {
275 cqr->status = DASD_CQR_DONE; 275 cqr->status = DASD_CQR_SUCCESS;
276 /* Start first request on queue if possible -> fast_io. */ 276 /* Start first request on queue if possible -> fast_io. */
277 if (!list_empty(&device->ccw_queue)) { 277 if (!list_empty(&device->ccw_queue)) {
278 next = list_entry(device->ccw_queue.next, 278 next = list_entry(device->ccw_queue.next,
279 struct dasd_ccw_req, list); 279 struct dasd_ccw_req, devlist);
280 if (next->status == DASD_CQR_QUEUED) { 280 if (next->status == DASD_CQR_QUEUED) {
281 rc = dasd_start_diag(next); 281 rc = dasd_start_diag(next);
282 if (rc == 0) 282 if (rc == 0)
@@ -296,10 +296,10 @@ dasd_ext_handler(__u16 code)
296 } 296 }
297 297
298 if (expires != 0) 298 if (expires != 0)
299 dasd_set_timer(device, expires); 299 dasd_device_set_timer(device, expires);
300 else 300 else
301 dasd_clear_timer(device); 301 dasd_device_clear_timer(device);
302 dasd_schedule_bh(device); 302 dasd_schedule_device_bh(device);
303 303
304 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 304 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
305} 305}
@@ -309,6 +309,7 @@ dasd_ext_handler(__u16 code)
309static int 309static int
310dasd_diag_check_device(struct dasd_device *device) 310dasd_diag_check_device(struct dasd_device *device)
311{ 311{
312 struct dasd_block *block;
312 struct dasd_diag_private *private; 313 struct dasd_diag_private *private;
313 struct dasd_diag_characteristics *rdc_data; 314 struct dasd_diag_characteristics *rdc_data;
314 struct dasd_diag_bio bio; 315 struct dasd_diag_bio bio;
@@ -328,6 +329,16 @@ dasd_diag_check_device(struct dasd_device *device)
328 ccw_device_get_id(device->cdev, &private->dev_id); 329 ccw_device_get_id(device->cdev, &private->dev_id);
329 device->private = (void *) private; 330 device->private = (void *) private;
330 } 331 }
332 block = dasd_alloc_block();
333 if (IS_ERR(block)) {
334 DEV_MESSAGE(KERN_WARNING, device, "%s",
335 "could not allocate dasd block structure");
336 kfree(device->private);
337 return PTR_ERR(block);
338 }
339 device->block = block;
340 block->base = device;
341
331 /* Read Device Characteristics */ 342 /* Read Device Characteristics */
332 rdc_data = (void *) &(private->rdc_data); 343 rdc_data = (void *) &(private->rdc_data);
333 rdc_data->dev_nr = private->dev_id.devno; 344 rdc_data->dev_nr = private->dev_id.devno;
@@ -409,14 +420,14 @@ dasd_diag_check_device(struct dasd_device *device)
409 sizeof(DASD_DIAG_CMS1)) == 0) { 420 sizeof(DASD_DIAG_CMS1)) == 0) {
410 /* get formatted blocksize from label block */ 421 /* get formatted blocksize from label block */
411 bsize = (unsigned int) label->block_size; 422 bsize = (unsigned int) label->block_size;
412 device->blocks = (unsigned long) label->block_count; 423 block->blocks = (unsigned long) label->block_count;
413 } else 424 } else
414 device->blocks = end_block; 425 block->blocks = end_block;
415 device->bp_block = bsize; 426 block->bp_block = bsize;
416 device->s2b_shift = 0; /* bits to shift 512 to get a block */ 427 block->s2b_shift = 0; /* bits to shift 512 to get a block */
417 for (sb = 512; sb < bsize; sb = sb << 1) 428 for (sb = 512; sb < bsize; sb = sb << 1)
418 device->s2b_shift++; 429 block->s2b_shift++;
419 rc = mdsk_init_io(device, device->bp_block, 0, NULL); 430 rc = mdsk_init_io(device, block->bp_block, 0, NULL);
420 if (rc) { 431 if (rc) {
421 DEV_MESSAGE(KERN_WARNING, device, "DIAG initialization " 432 DEV_MESSAGE(KERN_WARNING, device, "DIAG initialization "
422 "failed (rc=%d)", rc); 433 "failed (rc=%d)", rc);
@@ -424,9 +435,9 @@ dasd_diag_check_device(struct dasd_device *device)
424 } else { 435 } else {
425 DEV_MESSAGE(KERN_INFO, device, 436 DEV_MESSAGE(KERN_INFO, device,
426 "(%ld B/blk): %ldkB", 437 "(%ld B/blk): %ldkB",
427 (unsigned long) device->bp_block, 438 (unsigned long) block->bp_block,
428 (unsigned long) (device->blocks << 439 (unsigned long) (block->blocks <<
429 device->s2b_shift) >> 1); 440 block->s2b_shift) >> 1);
430 } 441 }
431out: 442out:
432 free_page((long) label); 443 free_page((long) label);
@@ -436,22 +447,16 @@ out:
436/* Fill in virtual disk geometry for device. Return zero on success, non-zero 447/* Fill in virtual disk geometry for device. Return zero on success, non-zero
437 * otherwise. */ 448 * otherwise. */
438static int 449static int
439dasd_diag_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) 450dasd_diag_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
440{ 451{
441 if (dasd_check_blocksize(device->bp_block) != 0) 452 if (dasd_check_blocksize(block->bp_block) != 0)
442 return -EINVAL; 453 return -EINVAL;
443 geo->cylinders = (device->blocks << device->s2b_shift) >> 10; 454 geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
444 geo->heads = 16; 455 geo->heads = 16;
445 geo->sectors = 128 >> device->s2b_shift; 456 geo->sectors = 128 >> block->s2b_shift;
446 return 0; 457 return 0;
447} 458}
448 459
449static dasd_era_t
450dasd_diag_examine_error(struct dasd_ccw_req * cqr, struct irb * stat)
451{
452 return dasd_era_fatal;
453}
454
455static dasd_erp_fn_t 460static dasd_erp_fn_t
456dasd_diag_erp_action(struct dasd_ccw_req * cqr) 461dasd_diag_erp_action(struct dasd_ccw_req * cqr)
457{ 462{
@@ -466,8 +471,9 @@ dasd_diag_erp_postaction(struct dasd_ccw_req * cqr)
466 471
467/* Create DASD request from block device request. Return pointer to new 472/* Create DASD request from block device request. Return pointer to new
468 * request on success, ERR_PTR otherwise. */ 473 * request on success, ERR_PTR otherwise. */
469static struct dasd_ccw_req * 474static struct dasd_ccw_req *dasd_diag_build_cp(struct dasd_device *memdev,
470dasd_diag_build_cp(struct dasd_device * device, struct request *req) 475 struct dasd_block *block,
476 struct request *req)
471{ 477{
472 struct dasd_ccw_req *cqr; 478 struct dasd_ccw_req *cqr;
473 struct dasd_diag_req *dreq; 479 struct dasd_diag_req *dreq;
@@ -486,17 +492,17 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req)
486 rw_cmd = MDSK_WRITE_REQ; 492 rw_cmd = MDSK_WRITE_REQ;
487 else 493 else
488 return ERR_PTR(-EINVAL); 494 return ERR_PTR(-EINVAL);
489 blksize = device->bp_block; 495 blksize = block->bp_block;
490 /* Calculate record id of first and last block. */ 496 /* Calculate record id of first and last block. */
491 first_rec = req->sector >> device->s2b_shift; 497 first_rec = req->sector >> block->s2b_shift;
492 last_rec = (req->sector + req->nr_sectors - 1) >> device->s2b_shift; 498 last_rec = (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
493 /* Check struct bio and count the number of blocks for the request. */ 499 /* Check struct bio and count the number of blocks for the request. */
494 count = 0; 500 count = 0;
495 rq_for_each_segment(bv, req, iter) { 501 rq_for_each_segment(bv, req, iter) {
496 if (bv->bv_len & (blksize - 1)) 502 if (bv->bv_len & (blksize - 1))
497 /* Fba can only do full blocks. */ 503 /* Fba can only do full blocks. */
498 return ERR_PTR(-EINVAL); 504 return ERR_PTR(-EINVAL);
499 count += bv->bv_len >> (device->s2b_shift + 9); 505 count += bv->bv_len >> (block->s2b_shift + 9);
500 } 506 }
501 /* Paranoia. */ 507 /* Paranoia. */
502 if (count != last_rec - first_rec + 1) 508 if (count != last_rec - first_rec + 1)
@@ -505,7 +511,7 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req)
505 datasize = sizeof(struct dasd_diag_req) + 511 datasize = sizeof(struct dasd_diag_req) +
506 count*sizeof(struct dasd_diag_bio); 512 count*sizeof(struct dasd_diag_bio);
507 cqr = dasd_smalloc_request(dasd_diag_discipline.name, 0, 513 cqr = dasd_smalloc_request(dasd_diag_discipline.name, 0,
508 datasize, device); 514 datasize, memdev);
509 if (IS_ERR(cqr)) 515 if (IS_ERR(cqr))
510 return cqr; 516 return cqr;
511 517
@@ -529,7 +535,9 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req)
529 cqr->buildclk = get_clock(); 535 cqr->buildclk = get_clock();
530 if (req->cmd_flags & REQ_FAILFAST) 536 if (req->cmd_flags & REQ_FAILFAST)
531 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 537 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
532 cqr->device = device; 538 cqr->startdev = memdev;
539 cqr->memdev = memdev;
540 cqr->block = block;
533 cqr->expires = DIAG_TIMEOUT; 541 cqr->expires = DIAG_TIMEOUT;
534 cqr->status = DASD_CQR_FILLED; 542 cqr->status = DASD_CQR_FILLED;
535 return cqr; 543 return cqr;
@@ -543,10 +551,15 @@ dasd_diag_free_cp(struct dasd_ccw_req *cqr, struct request *req)
543 int status; 551 int status;
544 552
545 status = cqr->status == DASD_CQR_DONE; 553 status = cqr->status == DASD_CQR_DONE;
546 dasd_sfree_request(cqr, cqr->device); 554 dasd_sfree_request(cqr, cqr->memdev);
547 return status; 555 return status;
548} 556}
549 557
558static void dasd_diag_handle_terminated_request(struct dasd_ccw_req *cqr)
559{
560 cqr->status = DASD_CQR_FILLED;
561};
562
550/* Fill in IOCTL data for device. */ 563/* Fill in IOCTL data for device. */
551static int 564static int
552dasd_diag_fill_info(struct dasd_device * device, 565dasd_diag_fill_info(struct dasd_device * device,
@@ -583,7 +596,7 @@ static struct dasd_discipline dasd_diag_discipline = {
583 .fill_geometry = dasd_diag_fill_geometry, 596 .fill_geometry = dasd_diag_fill_geometry,
584 .start_IO = dasd_start_diag, 597 .start_IO = dasd_start_diag,
585 .term_IO = dasd_diag_term_IO, 598 .term_IO = dasd_diag_term_IO,
586 .examine_error = dasd_diag_examine_error, 599 .handle_terminated_request = dasd_diag_handle_terminated_request,
587 .erp_action = dasd_diag_erp_action, 600 .erp_action = dasd_diag_erp_action,
588 .erp_postaction = dasd_diag_erp_postaction, 601 .erp_postaction = dasd_diag_erp_postaction,
589 .build_cp = dasd_diag_build_cp, 602 .build_cp = dasd_diag_build_cp,
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 6038d9195e27..61f16937c1e0 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -52,16 +52,6 @@ MODULE_LICENSE("GPL");
52 52
53static struct dasd_discipline dasd_eckd_discipline; 53static struct dasd_discipline dasd_eckd_discipline;
54 54
55struct dasd_eckd_private {
56 struct dasd_eckd_characteristics rdc_data;
57 struct dasd_eckd_confdata conf_data;
58 struct dasd_eckd_path path_data;
59 struct eckd_count count_area[5];
60 int init_cqr_status;
61 int uses_cdl;
62 struct attrib_data_t attrib; /* e.g. cache operations */
63};
64
65/* The ccw bus type uses this table to find devices that it sends to 55/* The ccw bus type uses this table to find devices that it sends to
66 * dasd_eckd_probe */ 56 * dasd_eckd_probe */
67static struct ccw_device_id dasd_eckd_ids[] = { 57static struct ccw_device_id dasd_eckd_ids[] = {
@@ -188,7 +178,7 @@ check_XRC (struct ccw1 *de_ccw,
188 if (rc == -ENOSYS || rc == -EACCES) 178 if (rc == -ENOSYS || rc == -EACCES)
189 rc = 0; 179 rc = 0;
190 180
191 de_ccw->count = sizeof (struct DE_eckd_data); 181 de_ccw->count = sizeof(struct DE_eckd_data);
192 de_ccw->flags |= CCW_FLAG_SLI; 182 de_ccw->flags |= CCW_FLAG_SLI;
193 return rc; 183 return rc;
194} 184}
@@ -208,7 +198,7 @@ define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk,
208 ccw->count = 16; 198 ccw->count = 16;
209 ccw->cda = (__u32) __pa(data); 199 ccw->cda = (__u32) __pa(data);
210 200
211 memset(data, 0, sizeof (struct DE_eckd_data)); 201 memset(data, 0, sizeof(struct DE_eckd_data));
212 switch (cmd) { 202 switch (cmd) {
213 case DASD_ECKD_CCW_READ_HOME_ADDRESS: 203 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
214 case DASD_ECKD_CCW_READ_RECORD_ZERO: 204 case DASD_ECKD_CCW_READ_RECORD_ZERO:
@@ -280,6 +270,132 @@ define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk,
280 return rc; 270 return rc;
281} 271}
282 272
273static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
274 struct dasd_device *device)
275{
276 struct dasd_eckd_private *private;
277 int rc;
278
279 private = (struct dasd_eckd_private *) device->private;
280 if (!private->rdc_data.facilities.XRC_supported)
281 return 0;
282
283 /* switch on System Time Stamp - needed for XRC Support */
284 pfxdata->define_extend.ga_extended |= 0x08; /* 'Time Stamp Valid' */
285 pfxdata->define_extend.ga_extended |= 0x02; /* 'Extended Parameter' */
286 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
287
288 rc = get_sync_clock(&pfxdata->define_extend.ep_sys_time);
289 /* Ignore return code if sync clock is switched off. */
290 if (rc == -ENOSYS || rc == -EACCES)
291 rc = 0;
292 return rc;
293}
294
295static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, int trk,
296 int totrk, int cmd, struct dasd_device *basedev,
297 struct dasd_device *startdev)
298{
299 struct dasd_eckd_private *basepriv, *startpriv;
300 struct DE_eckd_data *data;
301 struct ch_t geo, beg, end;
302 int rc = 0;
303
304 basepriv = (struct dasd_eckd_private *) basedev->private;
305 startpriv = (struct dasd_eckd_private *) startdev->private;
306 data = &pfxdata->define_extend;
307
308 ccw->cmd_code = DASD_ECKD_CCW_PFX;
309 ccw->flags = 0;
310 ccw->count = sizeof(*pfxdata);
311 ccw->cda = (__u32) __pa(pfxdata);
312
313 memset(pfxdata, 0, sizeof(*pfxdata));
314 /* prefix data */
315 pfxdata->format = 0;
316 pfxdata->base_address = basepriv->conf_data.ned1.unit_addr;
317 pfxdata->base_lss = basepriv->conf_data.ned1.ID;
318 pfxdata->validity.define_extend = 1;
319
320 /* private uid is kept up to date, conf_data may be outdated */
321 if (startpriv->uid.type != UA_BASE_DEVICE) {
322 pfxdata->validity.verify_base = 1;
323 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
324 pfxdata->validity.hyper_pav = 1;
325 }
326
327 /* define extend data (mostly)*/
328 switch (cmd) {
329 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
330 case DASD_ECKD_CCW_READ_RECORD_ZERO:
331 case DASD_ECKD_CCW_READ:
332 case DASD_ECKD_CCW_READ_MT:
333 case DASD_ECKD_CCW_READ_CKD:
334 case DASD_ECKD_CCW_READ_CKD_MT:
335 case DASD_ECKD_CCW_READ_KD:
336 case DASD_ECKD_CCW_READ_KD_MT:
337 case DASD_ECKD_CCW_READ_COUNT:
338 data->mask.perm = 0x1;
339 data->attributes.operation = basepriv->attrib.operation;
340 break;
341 case DASD_ECKD_CCW_WRITE:
342 case DASD_ECKD_CCW_WRITE_MT:
343 case DASD_ECKD_CCW_WRITE_KD:
344 case DASD_ECKD_CCW_WRITE_KD_MT:
345 data->mask.perm = 0x02;
346 data->attributes.operation = basepriv->attrib.operation;
347 rc = check_XRC_on_prefix(pfxdata, basedev);
348 break;
349 case DASD_ECKD_CCW_WRITE_CKD:
350 case DASD_ECKD_CCW_WRITE_CKD_MT:
351 data->attributes.operation = DASD_BYPASS_CACHE;
352 rc = check_XRC_on_prefix(pfxdata, basedev);
353 break;
354 case DASD_ECKD_CCW_ERASE:
355 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
356 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
357 data->mask.perm = 0x3;
358 data->mask.auth = 0x1;
359 data->attributes.operation = DASD_BYPASS_CACHE;
360 rc = check_XRC_on_prefix(pfxdata, basedev);
361 break;
362 default:
363 DEV_MESSAGE(KERN_ERR, basedev, "unknown opcode 0x%x", cmd);
364 break;
365 }
366
367 data->attributes.mode = 0x3; /* ECKD */
368
369 if ((basepriv->rdc_data.cu_type == 0x2105 ||
370 basepriv->rdc_data.cu_type == 0x2107 ||
371 basepriv->rdc_data.cu_type == 0x1750)
372 && !(basepriv->uses_cdl && trk < 2))
373 data->ga_extended |= 0x40; /* Regular Data Format Mode */
374
375 geo.cyl = basepriv->rdc_data.no_cyl;
376 geo.head = basepriv->rdc_data.trk_per_cyl;
377 beg.cyl = trk / geo.head;
378 beg.head = trk % geo.head;
379 end.cyl = totrk / geo.head;
380 end.head = totrk % geo.head;
381
382 /* check for sequential prestage - enhance cylinder range */
383 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
384 data->attributes.operation == DASD_SEQ_ACCESS) {
385
386 if (end.cyl + basepriv->attrib.nr_cyl < geo.cyl)
387 end.cyl += basepriv->attrib.nr_cyl;
388 else
389 end.cyl = (geo.cyl - 1);
390 }
391
392 data->beg_ext.cyl = beg.cyl;
393 data->beg_ext.head = beg.head;
394 data->end_ext.cyl = end.cyl;
395 data->end_ext.head = end.head;
396 return rc;
397}
398
283static void 399static void
284locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, 400locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk,
285 int rec_on_trk, int no_rec, int cmd, 401 int rec_on_trk, int no_rec, int cmd,
@@ -300,7 +416,7 @@ locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk,
300 ccw->count = 16; 416 ccw->count = 16;
301 ccw->cda = (__u32) __pa(data); 417 ccw->cda = (__u32) __pa(data);
302 418
303 memset(data, 0, sizeof (struct LO_eckd_data)); 419 memset(data, 0, sizeof(struct LO_eckd_data));
304 sector = 0; 420 sector = 0;
305 if (rec_on_trk) { 421 if (rec_on_trk) {
306 switch (private->rdc_data.dev_type) { 422 switch (private->rdc_data.dev_type) {
@@ -441,12 +557,15 @@ dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid)
441 sizeof(uid->serial) - 1); 557 sizeof(uid->serial) - 1);
442 EBCASC(uid->serial, sizeof(uid->serial) - 1); 558 EBCASC(uid->serial, sizeof(uid->serial) - 1);
443 uid->ssid = confdata->neq.subsystemID; 559 uid->ssid = confdata->neq.subsystemID;
444 if (confdata->ned2.sneq.flags == 0x40) { 560 uid->real_unit_addr = confdata->ned1.unit_addr;
445 uid->alias = 1; 561 if (confdata->ned2.sneq.flags == 0x40 &&
446 uid->unit_addr = confdata->ned2.sneq.base_unit_addr; 562 confdata->ned2.sneq.format == 0x0001) {
447 } else 563 uid->type = confdata->ned2.sneq.sua_flags;
448 uid->unit_addr = confdata->ned1.unit_addr; 564 if (uid->type == UA_BASE_PAV_ALIAS)
449 565 uid->base_unit_addr = confdata->ned2.sneq.base_unit_addr;
566 } else {
567 uid->type = UA_BASE_DEVICE;
568 }
450 return 0; 569 return 0;
451} 570}
452 571
@@ -470,7 +589,9 @@ static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
470 ccw->cda = (__u32)(addr_t)rcd_buffer; 589 ccw->cda = (__u32)(addr_t)rcd_buffer;
471 ccw->count = ciw->count; 590 ccw->count = ciw->count;
472 591
473 cqr->device = device; 592 cqr->startdev = device;
593 cqr->memdev = device;
594 cqr->block = NULL;
474 cqr->expires = 10*HZ; 595 cqr->expires = 10*HZ;
475 cqr->lpm = lpm; 596 cqr->lpm = lpm;
476 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 597 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
@@ -511,7 +632,7 @@ static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
511 /* 632 /*
512 * on success we update the user input parms 633 * on success we update the user input parms
513 */ 634 */
514 dasd_sfree_request(cqr, cqr->device); 635 dasd_sfree_request(cqr, cqr->memdev);
515 if (ret) 636 if (ret)
516 goto out_error; 637 goto out_error;
517 638
@@ -557,19 +678,19 @@ dasd_eckd_read_conf(struct dasd_device *device)
557 "data retrieved"); 678 "data retrieved");
558 continue; /* no error */ 679 continue; /* no error */
559 } 680 }
560 if (conf_len != sizeof (struct dasd_eckd_confdata)) { 681 if (conf_len != sizeof(struct dasd_eckd_confdata)) {
561 MESSAGE(KERN_WARNING, 682 MESSAGE(KERN_WARNING,
562 "sizes of configuration data mismatch" 683 "sizes of configuration data mismatch"
563 "%d (read) vs %ld (expected)", 684 "%d (read) vs %ld (expected)",
564 conf_len, 685 conf_len,
565 sizeof (struct dasd_eckd_confdata)); 686 sizeof(struct dasd_eckd_confdata));
566 kfree(conf_data); 687 kfree(conf_data);
567 continue; /* no error */ 688 continue; /* no error */
568 } 689 }
569 /* save first valid configuration data */ 690 /* save first valid configuration data */
570 if (!conf_data_saved){ 691 if (!conf_data_saved){
571 memcpy(&private->conf_data, conf_data, 692 memcpy(&private->conf_data, conf_data,
572 sizeof (struct dasd_eckd_confdata)); 693 sizeof(struct dasd_eckd_confdata));
573 conf_data_saved++; 694 conf_data_saved++;
574 } 695 }
575 switch (((char *)conf_data)[242] & 0x07){ 696 switch (((char *)conf_data)[242] & 0x07){
@@ -586,39 +707,104 @@ dasd_eckd_read_conf(struct dasd_device *device)
586 return 0; 707 return 0;
587} 708}
588 709
710static int dasd_eckd_read_features(struct dasd_device *device)
711{
712 struct dasd_psf_prssd_data *prssdp;
713 struct dasd_rssd_features *features;
714 struct dasd_ccw_req *cqr;
715 struct ccw1 *ccw;
716 int rc;
717 struct dasd_eckd_private *private;
718
719 private = (struct dasd_eckd_private *) device->private;
720 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
721 1 /* PSF */ + 1 /* RSSD */ ,
722 (sizeof(struct dasd_psf_prssd_data) +
723 sizeof(struct dasd_rssd_features)),
724 device);
725 if (IS_ERR(cqr)) {
726 DEV_MESSAGE(KERN_WARNING, device, "%s",
727 "Could not allocate initialization request");
728 return PTR_ERR(cqr);
729 }
730 cqr->startdev = device;
731 cqr->memdev = device;
732 cqr->block = NULL;
733 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
734 cqr->retries = 5;
735 cqr->expires = 10 * HZ;
736
737 /* Prepare for Read Subsystem Data */
738 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
739 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
740 prssdp->order = PSF_ORDER_PRSSD;
741 prssdp->suborder = 0x41; /* Read Feature Codes */
742 /* all other bytes of prssdp must be zero */
743
744 ccw = cqr->cpaddr;
745 ccw->cmd_code = DASD_ECKD_CCW_PSF;
746 ccw->count = sizeof(struct dasd_psf_prssd_data);
747 ccw->flags |= CCW_FLAG_CC;
748 ccw->cda = (__u32)(addr_t) prssdp;
749
750 /* Read Subsystem Data - feature codes */
751 features = (struct dasd_rssd_features *) (prssdp + 1);
752 memset(features, 0, sizeof(struct dasd_rssd_features));
753
754 ccw++;
755 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
756 ccw->count = sizeof(struct dasd_rssd_features);
757 ccw->cda = (__u32)(addr_t) features;
758
759 cqr->buildclk = get_clock();
760 cqr->status = DASD_CQR_FILLED;
761 rc = dasd_sleep_on(cqr);
762 if (rc == 0) {
763 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
764 features = (struct dasd_rssd_features *) (prssdp + 1);
765 memcpy(&private->features, features,
766 sizeof(struct dasd_rssd_features));
767 }
768 dasd_sfree_request(cqr, cqr->memdev);
769 return rc;
770}
771
772
589/* 773/*
590 * Build CP for Perform Subsystem Function - SSC. 774 * Build CP for Perform Subsystem Function - SSC.
591 */ 775 */
592static struct dasd_ccw_req * 776static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device)
593dasd_eckd_build_psf_ssc(struct dasd_device *device)
594{ 777{
595 struct dasd_ccw_req *cqr; 778 struct dasd_ccw_req *cqr;
596 struct dasd_psf_ssc_data *psf_ssc_data; 779 struct dasd_psf_ssc_data *psf_ssc_data;
597 struct ccw1 *ccw; 780 struct ccw1 *ccw;
598 781
599 cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 782 cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ ,
600 sizeof(struct dasd_psf_ssc_data), 783 sizeof(struct dasd_psf_ssc_data),
601 device); 784 device);
602 785
603 if (IS_ERR(cqr)) { 786 if (IS_ERR(cqr)) {
604 DEV_MESSAGE(KERN_WARNING, device, "%s", 787 DEV_MESSAGE(KERN_WARNING, device, "%s",
605 "Could not allocate PSF-SSC request"); 788 "Could not allocate PSF-SSC request");
606 return cqr; 789 return cqr;
607 } 790 }
608 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 791 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
609 psf_ssc_data->order = PSF_ORDER_SSC; 792 psf_ssc_data->order = PSF_ORDER_SSC;
610 psf_ssc_data->suborder = 0x08; 793 psf_ssc_data->suborder = 0x88;
611 794 psf_ssc_data->reserved[0] = 0x88;
612 ccw = cqr->cpaddr; 795
613 ccw->cmd_code = DASD_ECKD_CCW_PSF; 796 ccw = cqr->cpaddr;
614 ccw->cda = (__u32)(addr_t)psf_ssc_data; 797 ccw->cmd_code = DASD_ECKD_CCW_PSF;
615 ccw->count = 66; 798 ccw->cda = (__u32)(addr_t)psf_ssc_data;
616 799 ccw->count = 66;
617 cqr->device = device; 800
618 cqr->expires = 10*HZ; 801 cqr->startdev = device;
619 cqr->buildclk = get_clock(); 802 cqr->memdev = device;
620 cqr->status = DASD_CQR_FILLED; 803 cqr->block = NULL;
621 return cqr; 804 cqr->expires = 10*HZ;
805 cqr->buildclk = get_clock();
806 cqr->status = DASD_CQR_FILLED;
807 return cqr;
622} 808}
623 809
624/* 810/*
@@ -629,28 +815,28 @@ dasd_eckd_build_psf_ssc(struct dasd_device *device)
629static int 815static int
630dasd_eckd_psf_ssc(struct dasd_device *device) 816dasd_eckd_psf_ssc(struct dasd_device *device)
631{ 817{
632 struct dasd_ccw_req *cqr; 818 struct dasd_ccw_req *cqr;
633 int rc; 819 int rc;
634 820
635 cqr = dasd_eckd_build_psf_ssc(device); 821 cqr = dasd_eckd_build_psf_ssc(device);
636 if (IS_ERR(cqr)) 822 if (IS_ERR(cqr))
637 return PTR_ERR(cqr); 823 return PTR_ERR(cqr);
638 824
639 rc = dasd_sleep_on(cqr); 825 rc = dasd_sleep_on(cqr);
640 if (!rc) 826 if (!rc)
641 /* trigger CIO to reprobe devices */ 827 /* trigger CIO to reprobe devices */
642 css_schedule_reprobe(); 828 css_schedule_reprobe();
643 dasd_sfree_request(cqr, cqr->device); 829 dasd_sfree_request(cqr, cqr->memdev);
644 return rc; 830 return rc;
645} 831}
646 832
647/* 833/*
648 * Valide storage server of current device. 834 * Valide storage server of current device.
649 */ 835 */
650static int 836static int dasd_eckd_validate_server(struct dasd_device *device)
651dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid)
652{ 837{
653 int rc; 838 int rc;
839 struct dasd_eckd_private *private;
654 840
655 /* Currently PAV is the only reason to 'validate' server on LPAR */ 841 /* Currently PAV is the only reason to 'validate' server on LPAR */
656 if (dasd_nopav || MACHINE_IS_VM) 842 if (dasd_nopav || MACHINE_IS_VM)
@@ -659,9 +845,11 @@ dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid)
659 rc = dasd_eckd_psf_ssc(device); 845 rc = dasd_eckd_psf_ssc(device);
660 /* may be requested feature is not available on server, 846 /* may be requested feature is not available on server,
661 * therefore just report error and go ahead */ 847 * therefore just report error and go ahead */
848 private = (struct dasd_eckd_private *) device->private;
662 DEV_MESSAGE(KERN_INFO, device, 849 DEV_MESSAGE(KERN_INFO, device,
663 "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", 850 "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d",
664 uid->vendor, uid->serial, uid->ssid, rc); 851 private->uid.vendor, private->uid.serial,
852 private->uid.ssid, rc);
665 /* RE-Read Configuration Data */ 853 /* RE-Read Configuration Data */
666 return dasd_eckd_read_conf(device); 854 return dasd_eckd_read_conf(device);
667} 855}
@@ -674,9 +862,9 @@ static int
674dasd_eckd_check_characteristics(struct dasd_device *device) 862dasd_eckd_check_characteristics(struct dasd_device *device)
675{ 863{
676 struct dasd_eckd_private *private; 864 struct dasd_eckd_private *private;
677 struct dasd_uid uid; 865 struct dasd_block *block;
678 void *rdc_data; 866 void *rdc_data;
679 int rc; 867 int is_known, rc;
680 868
681 private = (struct dasd_eckd_private *) device->private; 869 private = (struct dasd_eckd_private *) device->private;
682 if (private == NULL) { 870 if (private == NULL) {
@@ -699,27 +887,54 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
699 /* Read Configuration Data */ 887 /* Read Configuration Data */
700 rc = dasd_eckd_read_conf(device); 888 rc = dasd_eckd_read_conf(device);
701 if (rc) 889 if (rc)
702 return rc; 890 goto out_err1;
703 891
704 /* Generate device unique id and register in devmap */ 892 /* Generate device unique id and register in devmap */
705 rc = dasd_eckd_generate_uid(device, &uid); 893 rc = dasd_eckd_generate_uid(device, &private->uid);
706 if (rc) 894 if (rc)
707 return rc; 895 goto out_err1;
708 rc = dasd_set_uid(device->cdev, &uid); 896 dasd_set_uid(device->cdev, &private->uid);
709 if (rc == 1) /* new server found */ 897
710 rc = dasd_eckd_validate_server(device, &uid); 898 if (private->uid.type == UA_BASE_DEVICE) {
899 block = dasd_alloc_block();
900 if (IS_ERR(block)) {
901 DEV_MESSAGE(KERN_WARNING, device, "%s",
902 "could not allocate dasd block structure");
903 rc = PTR_ERR(block);
904 goto out_err1;
905 }
906 device->block = block;
907 block->base = device;
908 }
909
910 /* register lcu with alias handling, enable PAV if this is a new lcu */
911 is_known = dasd_alias_make_device_known_to_lcu(device);
912 if (is_known < 0) {
913 rc = is_known;
914 goto out_err2;
915 }
916 if (!is_known) {
917 /* new lcu found */
918 rc = dasd_eckd_validate_server(device); /* will switch pav on */
919 if (rc)
920 goto out_err3;
921 }
922
923 /* Read Feature Codes */
924 rc = dasd_eckd_read_features(device);
711 if (rc) 925 if (rc)
712 return rc; 926 goto out_err3;
713 927
714 /* Read Device Characteristics */ 928 /* Read Device Characteristics */
715 rdc_data = (void *) &(private->rdc_data); 929 rdc_data = (void *) &(private->rdc_data);
716 memset(rdc_data, 0, sizeof(rdc_data)); 930 memset(rdc_data, 0, sizeof(rdc_data));
717 rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); 931 rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64);
718 if (rc) 932 if (rc) {
719 DEV_MESSAGE(KERN_WARNING, device, 933 DEV_MESSAGE(KERN_WARNING, device,
720 "Read device characteristics returned " 934 "Read device characteristics returned "
721 "rc=%d", rc); 935 "rc=%d", rc);
722 936 goto out_err3;
937 }
723 DEV_MESSAGE(KERN_INFO, device, 938 DEV_MESSAGE(KERN_INFO, device,
724 "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 939 "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d",
725 private->rdc_data.dev_type, 940 private->rdc_data.dev_type,
@@ -729,9 +944,24 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
729 private->rdc_data.no_cyl, 944 private->rdc_data.no_cyl,
730 private->rdc_data.trk_per_cyl, 945 private->rdc_data.trk_per_cyl,
731 private->rdc_data.sec_per_trk); 946 private->rdc_data.sec_per_trk);
947 return 0;
948
949out_err3:
950 dasd_alias_disconnect_device_from_lcu(device);
951out_err2:
952 dasd_free_block(device->block);
953 device->block = NULL;
954out_err1:
955 kfree(device->private);
956 device->private = NULL;
732 return rc; 957 return rc;
733} 958}
734 959
960static void dasd_eckd_uncheck_device(struct dasd_device *device)
961{
962 dasd_alias_disconnect_device_from_lcu(device);
963}
964
735static struct dasd_ccw_req * 965static struct dasd_ccw_req *
736dasd_eckd_analysis_ccw(struct dasd_device *device) 966dasd_eckd_analysis_ccw(struct dasd_device *device)
737{ 967{
@@ -755,7 +985,7 @@ dasd_eckd_analysis_ccw(struct dasd_device *device)
755 /* Define extent for the first 3 tracks. */ 985 /* Define extent for the first 3 tracks. */
756 define_extent(ccw++, cqr->data, 0, 2, 986 define_extent(ccw++, cqr->data, 0, 2,
757 DASD_ECKD_CCW_READ_COUNT, device); 987 DASD_ECKD_CCW_READ_COUNT, device);
758 LO_data = cqr->data + sizeof (struct DE_eckd_data); 988 LO_data = cqr->data + sizeof(struct DE_eckd_data);
759 /* Locate record for the first 4 records on track 0. */ 989 /* Locate record for the first 4 records on track 0. */
760 ccw[-1].flags |= CCW_FLAG_CC; 990 ccw[-1].flags |= CCW_FLAG_CC;
761 locate_record(ccw++, LO_data++, 0, 0, 4, 991 locate_record(ccw++, LO_data++, 0, 0, 4,
@@ -783,7 +1013,9 @@ dasd_eckd_analysis_ccw(struct dasd_device *device)
783 ccw->count = 8; 1013 ccw->count = 8;
784 ccw->cda = (__u32)(addr_t) count_data; 1014 ccw->cda = (__u32)(addr_t) count_data;
785 1015
786 cqr->device = device; 1016 cqr->block = NULL;
1017 cqr->startdev = device;
1018 cqr->memdev = device;
787 cqr->retries = 0; 1019 cqr->retries = 0;
788 cqr->buildclk = get_clock(); 1020 cqr->buildclk = get_clock();
789 cqr->status = DASD_CQR_FILLED; 1021 cqr->status = DASD_CQR_FILLED;
@@ -803,7 +1035,7 @@ dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
803 struct dasd_eckd_private *private; 1035 struct dasd_eckd_private *private;
804 struct dasd_device *device; 1036 struct dasd_device *device;
805 1037
806 device = init_cqr->device; 1038 device = init_cqr->startdev;
807 private = (struct dasd_eckd_private *) device->private; 1039 private = (struct dasd_eckd_private *) device->private;
808 private->init_cqr_status = init_cqr->status; 1040 private->init_cqr_status = init_cqr->status;
809 dasd_sfree_request(init_cqr, device); 1041 dasd_sfree_request(init_cqr, device);
@@ -811,13 +1043,13 @@ dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
811} 1043}
812 1044
813static int 1045static int
814dasd_eckd_start_analysis(struct dasd_device *device) 1046dasd_eckd_start_analysis(struct dasd_block *block)
815{ 1047{
816 struct dasd_eckd_private *private; 1048 struct dasd_eckd_private *private;
817 struct dasd_ccw_req *init_cqr; 1049 struct dasd_ccw_req *init_cqr;
818 1050
819 private = (struct dasd_eckd_private *) device->private; 1051 private = (struct dasd_eckd_private *) block->base->private;
820 init_cqr = dasd_eckd_analysis_ccw(device); 1052 init_cqr = dasd_eckd_analysis_ccw(block->base);
821 if (IS_ERR(init_cqr)) 1053 if (IS_ERR(init_cqr))
822 return PTR_ERR(init_cqr); 1054 return PTR_ERR(init_cqr);
823 init_cqr->callback = dasd_eckd_analysis_callback; 1055 init_cqr->callback = dasd_eckd_analysis_callback;
@@ -828,13 +1060,15 @@ dasd_eckd_start_analysis(struct dasd_device *device)
828} 1060}
829 1061
830static int 1062static int
831dasd_eckd_end_analysis(struct dasd_device *device) 1063dasd_eckd_end_analysis(struct dasd_block *block)
832{ 1064{
1065 struct dasd_device *device;
833 struct dasd_eckd_private *private; 1066 struct dasd_eckd_private *private;
834 struct eckd_count *count_area; 1067 struct eckd_count *count_area;
835 unsigned int sb, blk_per_trk; 1068 unsigned int sb, blk_per_trk;
836 int status, i; 1069 int status, i;
837 1070
1071 device = block->base;
838 private = (struct dasd_eckd_private *) device->private; 1072 private = (struct dasd_eckd_private *) device->private;
839 status = private->init_cqr_status; 1073 status = private->init_cqr_status;
840 private->init_cqr_status = -1; 1074 private->init_cqr_status = -1;
@@ -846,7 +1080,7 @@ dasd_eckd_end_analysis(struct dasd_device *device)
846 1080
847 private->uses_cdl = 1; 1081 private->uses_cdl = 1;
848 /* Calculate number of blocks/records per track. */ 1082 /* Calculate number of blocks/records per track. */
849 blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 1083 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
850 /* Check Track 0 for Compatible Disk Layout */ 1084 /* Check Track 0 for Compatible Disk Layout */
851 count_area = NULL; 1085 count_area = NULL;
852 for (i = 0; i < 3; i++) { 1086 for (i = 0; i < 3; i++) {
@@ -876,56 +1110,65 @@ dasd_eckd_end_analysis(struct dasd_device *device)
876 if (count_area != NULL && count_area->kl == 0) { 1110 if (count_area != NULL && count_area->kl == 0) {
877 /* we found notthing violating our disk layout */ 1111 /* we found notthing violating our disk layout */
878 if (dasd_check_blocksize(count_area->dl) == 0) 1112 if (dasd_check_blocksize(count_area->dl) == 0)
879 device->bp_block = count_area->dl; 1113 block->bp_block = count_area->dl;
880 } 1114 }
881 if (device->bp_block == 0) { 1115 if (block->bp_block == 0) {
882 DEV_MESSAGE(KERN_WARNING, device, "%s", 1116 DEV_MESSAGE(KERN_WARNING, device, "%s",
883 "Volume has incompatible disk layout"); 1117 "Volume has incompatible disk layout");
884 return -EMEDIUMTYPE; 1118 return -EMEDIUMTYPE;
885 } 1119 }
886 device->s2b_shift = 0; /* bits to shift 512 to get a block */ 1120 block->s2b_shift = 0; /* bits to shift 512 to get a block */
887 for (sb = 512; sb < device->bp_block; sb = sb << 1) 1121 for (sb = 512; sb < block->bp_block; sb = sb << 1)
888 device->s2b_shift++; 1122 block->s2b_shift++;
889 1123
890 blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 1124 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
891 device->blocks = (private->rdc_data.no_cyl * 1125 block->blocks = (private->rdc_data.no_cyl *
892 private->rdc_data.trk_per_cyl * 1126 private->rdc_data.trk_per_cyl *
893 blk_per_trk); 1127 blk_per_trk);
894 1128
895 DEV_MESSAGE(KERN_INFO, device, 1129 DEV_MESSAGE(KERN_INFO, device,
896 "(%dkB blks): %dkB at %dkB/trk %s", 1130 "(%dkB blks): %dkB at %dkB/trk %s",
897 (device->bp_block >> 10), 1131 (block->bp_block >> 10),
898 ((private->rdc_data.no_cyl * 1132 ((private->rdc_data.no_cyl *
899 private->rdc_data.trk_per_cyl * 1133 private->rdc_data.trk_per_cyl *
900 blk_per_trk * (device->bp_block >> 9)) >> 1), 1134 blk_per_trk * (block->bp_block >> 9)) >> 1),
901 ((blk_per_trk * device->bp_block) >> 10), 1135 ((blk_per_trk * block->bp_block) >> 10),
902 private->uses_cdl ? 1136 private->uses_cdl ?
903 "compatible disk layout" : "linux disk layout"); 1137 "compatible disk layout" : "linux disk layout");
904 1138
905 return 0; 1139 return 0;
906} 1140}
907 1141
908static int 1142static int dasd_eckd_do_analysis(struct dasd_block *block)
909dasd_eckd_do_analysis(struct dasd_device *device)
910{ 1143{
911 struct dasd_eckd_private *private; 1144 struct dasd_eckd_private *private;
912 1145
913 private = (struct dasd_eckd_private *) device->private; 1146 private = (struct dasd_eckd_private *) block->base->private;
914 if (private->init_cqr_status < 0) 1147 if (private->init_cqr_status < 0)
915 return dasd_eckd_start_analysis(device); 1148 return dasd_eckd_start_analysis(block);
916 else 1149 else
917 return dasd_eckd_end_analysis(device); 1150 return dasd_eckd_end_analysis(block);
918} 1151}
919 1152
1153static int dasd_eckd_ready_to_online(struct dasd_device *device)
1154{
1155 return dasd_alias_add_device(device);
1156};
1157
1158static int dasd_eckd_online_to_ready(struct dasd_device *device)
1159{
1160 return dasd_alias_remove_device(device);
1161};
1162
920static int 1163static int
921dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) 1164dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
922{ 1165{
923 struct dasd_eckd_private *private; 1166 struct dasd_eckd_private *private;
924 1167
925 private = (struct dasd_eckd_private *) device->private; 1168 private = (struct dasd_eckd_private *) block->base->private;
926 if (dasd_check_blocksize(device->bp_block) == 0) { 1169 if (dasd_check_blocksize(block->bp_block) == 0) {
927 geo->sectors = recs_per_track(&private->rdc_data, 1170 geo->sectors = recs_per_track(&private->rdc_data,
928 0, device->bp_block); 1171 0, block->bp_block);
929 } 1172 }
930 geo->cylinders = private->rdc_data.no_cyl; 1173 geo->cylinders = private->rdc_data.no_cyl;
931 geo->heads = private->rdc_data.trk_per_cyl; 1174 geo->heads = private->rdc_data.trk_per_cyl;
@@ -1037,7 +1280,7 @@ dasd_eckd_format_device(struct dasd_device * device,
1037 locate_record(ccw++, (struct LO_eckd_data *) data, 1280 locate_record(ccw++, (struct LO_eckd_data *) data,
1038 fdata->start_unit, 0, rpt + 1, 1281 fdata->start_unit, 0, rpt + 1,
1039 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 1282 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
1040 device->bp_block); 1283 device->block->bp_block);
1041 data += sizeof(struct LO_eckd_data); 1284 data += sizeof(struct LO_eckd_data);
1042 break; 1285 break;
1043 case 0x04: /* Invalidate track. */ 1286 case 0x04: /* Invalidate track. */
@@ -1110,43 +1353,28 @@ dasd_eckd_format_device(struct dasd_device * device,
1110 ccw++; 1353 ccw++;
1111 } 1354 }
1112 } 1355 }
1113 fcp->device = device; 1356 fcp->startdev = device;
1114 fcp->retries = 2; /* set retry counter to enable ERP */ 1357 fcp->memdev = device;
1358 clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags);
1359 fcp->retries = 5; /* set retry counter to enable default ERP */
1115 fcp->buildclk = get_clock(); 1360 fcp->buildclk = get_clock();
1116 fcp->status = DASD_CQR_FILLED; 1361 fcp->status = DASD_CQR_FILLED;
1117 return fcp; 1362 return fcp;
1118} 1363}
1119 1364
1120static dasd_era_t 1365static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1121dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb)
1122{ 1366{
1123 struct dasd_device *device = (struct dasd_device *) cqr->device; 1367 cqr->status = DASD_CQR_FILLED;
1124 struct ccw_device *cdev = device->cdev; 1368 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1125 1369 dasd_eckd_reset_ccw_to_base_io(cqr);
1126 if (irb->scsw.cstat == 0x00 && 1370 cqr->startdev = cqr->block->base;
1127 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
1128 return dasd_era_none;
1129
1130 switch (cdev->id.cu_type) {
1131 case 0x3990:
1132 case 0x2105:
1133 case 0x2107:
1134 case 0x1750:
1135 return dasd_3990_erp_examine(cqr, irb);
1136 case 0x9343:
1137 return dasd_9343_erp_examine(cqr, irb);
1138 case 0x3880:
1139 default:
1140 DEV_MESSAGE(KERN_WARNING, device, "%s",
1141 "default (unknown CU type) - RECOVERABLE return");
1142 return dasd_era_recover;
1143 } 1371 }
1144} 1372};
1145 1373
1146static dasd_erp_fn_t 1374static dasd_erp_fn_t
1147dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 1375dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1148{ 1376{
1149 struct dasd_device *device = (struct dasd_device *) cqr->device; 1377 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1150 struct ccw_device *cdev = device->cdev; 1378 struct ccw_device *cdev = device->cdev;
1151 1379
1152 switch (cdev->id.cu_type) { 1380 switch (cdev->id.cu_type) {
@@ -1168,8 +1396,37 @@ dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1168 return dasd_default_erp_postaction; 1396 return dasd_default_erp_postaction;
1169} 1397}
1170 1398
1171static struct dasd_ccw_req * 1399
1172dasd_eckd_build_cp(struct dasd_device * device, struct request *req) 1400static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1401 struct irb *irb)
1402{
1403 char mask;
1404
1405 /* first of all check for state change pending interrupt */
1406 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
1407 if ((irb->scsw.dstat & mask) == mask) {
1408 dasd_generic_handle_state_change(device);
1409 return;
1410 }
1411
1412 /* summary unit check */
1413 if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && irb->ecw[7] == 0x0D) {
1414 dasd_alias_handle_summary_unit_check(device, irb);
1415 return;
1416 }
1417
1418 /* just report other unsolicited interrupts */
1419 DEV_MESSAGE(KERN_DEBUG, device, "%s",
1420 "unsolicited interrupt received");
1421 device->discipline->dump_sense(device, NULL, irb);
1422 dasd_schedule_device_bh(device);
1423
1424 return;
1425};
1426
1427static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
1428 struct dasd_block *block,
1429 struct request *req)
1173{ 1430{
1174 struct dasd_eckd_private *private; 1431 struct dasd_eckd_private *private;
1175 unsigned long *idaws; 1432 unsigned long *idaws;
@@ -1185,8 +1442,11 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1185 sector_t first_trk, last_trk; 1442 sector_t first_trk, last_trk;
1186 unsigned int first_offs, last_offs; 1443 unsigned int first_offs, last_offs;
1187 unsigned char cmd, rcmd; 1444 unsigned char cmd, rcmd;
1445 int use_prefix;
1446 struct dasd_device *basedev;
1188 1447
1189 private = (struct dasd_eckd_private *) device->private; 1448 basedev = block->base;
1449 private = (struct dasd_eckd_private *) basedev->private;
1190 if (rq_data_dir(req) == READ) 1450 if (rq_data_dir(req) == READ)
1191 cmd = DASD_ECKD_CCW_READ_MT; 1451 cmd = DASD_ECKD_CCW_READ_MT;
1192 else if (rq_data_dir(req) == WRITE) 1452 else if (rq_data_dir(req) == WRITE)
@@ -1194,13 +1454,13 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1194 else 1454 else
1195 return ERR_PTR(-EINVAL); 1455 return ERR_PTR(-EINVAL);
1196 /* Calculate number of blocks/records per track. */ 1456 /* Calculate number of blocks/records per track. */
1197 blksize = device->bp_block; 1457 blksize = block->bp_block;
1198 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 1458 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
1199 /* Calculate record id of first and last block. */ 1459 /* Calculate record id of first and last block. */
1200 first_rec = first_trk = req->sector >> device->s2b_shift; 1460 first_rec = first_trk = req->sector >> block->s2b_shift;
1201 first_offs = sector_div(first_trk, blk_per_trk); 1461 first_offs = sector_div(first_trk, blk_per_trk);
1202 last_rec = last_trk = 1462 last_rec = last_trk =
1203 (req->sector + req->nr_sectors - 1) >> device->s2b_shift; 1463 (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
1204 last_offs = sector_div(last_trk, blk_per_trk); 1464 last_offs = sector_div(last_trk, blk_per_trk);
1205 /* Check struct bio and count the number of blocks for the request. */ 1465 /* Check struct bio and count the number of blocks for the request. */
1206 count = 0; 1466 count = 0;
@@ -1209,20 +1469,33 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1209 if (bv->bv_len & (blksize - 1)) 1469 if (bv->bv_len & (blksize - 1))
1210 /* Eckd can only do full blocks. */ 1470 /* Eckd can only do full blocks. */
1211 return ERR_PTR(-EINVAL); 1471 return ERR_PTR(-EINVAL);
1212 count += bv->bv_len >> (device->s2b_shift + 9); 1472 count += bv->bv_len >> (block->s2b_shift + 9);
1213#if defined(CONFIG_64BIT) 1473#if defined(CONFIG_64BIT)
1214 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 1474 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
1215 cidaw += bv->bv_len >> (device->s2b_shift + 9); 1475 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1216#endif 1476#endif
1217 } 1477 }
1218 /* Paranoia. */ 1478 /* Paranoia. */
1219 if (count != last_rec - first_rec + 1) 1479 if (count != last_rec - first_rec + 1)
1220 return ERR_PTR(-EINVAL); 1480 return ERR_PTR(-EINVAL);
1221 /* 1x define extent + 1x locate record + number of blocks */ 1481
1222 cplength = 2 + count; 1482 /* use the prefix command if available */
1223 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 1483 use_prefix = private->features.feature[8] & 0x01;
1224 datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + 1484 if (use_prefix) {
1225 cidaw * sizeof(unsigned long); 1485 /* 1x prefix + number of blocks */
1486 cplength = 2 + count;
1487 /* 1x prefix + cidaws*sizeof(long) */
1488 datasize = sizeof(struct PFX_eckd_data) +
1489 sizeof(struct LO_eckd_data) +
1490 cidaw * sizeof(unsigned long);
1491 } else {
1492 /* 1x define extent + 1x locate record + number of blocks */
1493 cplength = 2 + count;
1494 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1495 datasize = sizeof(struct DE_eckd_data) +
1496 sizeof(struct LO_eckd_data) +
1497 cidaw * sizeof(unsigned long);
1498 }
1226 /* Find out the number of additional locate record ccws for cdl. */ 1499 /* Find out the number of additional locate record ccws for cdl. */
1227 if (private->uses_cdl && first_rec < 2*blk_per_trk) { 1500 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1228 if (last_rec >= 2*blk_per_trk) 1501 if (last_rec >= 2*blk_per_trk)
@@ -1232,26 +1505,42 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1232 } 1505 }
1233 /* Allocate the ccw request. */ 1506 /* Allocate the ccw request. */
1234 cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1507 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1235 cplength, datasize, device); 1508 cplength, datasize, startdev);
1236 if (IS_ERR(cqr)) 1509 if (IS_ERR(cqr))
1237 return cqr; 1510 return cqr;
1238 ccw = cqr->cpaddr; 1511 ccw = cqr->cpaddr;
1239 /* First ccw is define extent. */ 1512 /* First ccw is define extent or prefix. */
1240 if (define_extent(ccw++, cqr->data, first_trk, 1513 if (use_prefix) {
1241 last_trk, cmd, device) == -EAGAIN) { 1514 if (prefix(ccw++, cqr->data, first_trk,
1242 /* Clock not in sync and XRC is enabled. Try again later. */ 1515 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1243 dasd_sfree_request(cqr, device); 1516 /* Clock not in sync and XRC is enabled.
1244 return ERR_PTR(-EAGAIN); 1517 * Try again later.
1518 */
1519 dasd_sfree_request(cqr, startdev);
1520 return ERR_PTR(-EAGAIN);
1521 }
1522 idaws = (unsigned long *) (cqr->data +
1523 sizeof(struct PFX_eckd_data));
1524 } else {
1525 if (define_extent(ccw++, cqr->data, first_trk,
1526 last_trk, cmd, startdev) == -EAGAIN) {
1527 /* Clock not in sync and XRC is enabled.
1528 * Try again later.
1529 */
1530 dasd_sfree_request(cqr, startdev);
1531 return ERR_PTR(-EAGAIN);
1532 }
1533 idaws = (unsigned long *) (cqr->data +
1534 sizeof(struct DE_eckd_data));
1245 } 1535 }
1246 /* Build locate_record+read/write/ccws. */ 1536 /* Build locate_record+read/write/ccws. */
1247 idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data));
1248 LO_data = (struct LO_eckd_data *) (idaws + cidaw); 1537 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1249 recid = first_rec; 1538 recid = first_rec;
1250 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 1539 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1251 /* Only standard blocks so there is just one locate record. */ 1540 /* Only standard blocks so there is just one locate record. */
1252 ccw[-1].flags |= CCW_FLAG_CC; 1541 ccw[-1].flags |= CCW_FLAG_CC;
1253 locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 1542 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1254 last_rec - recid + 1, cmd, device, blksize); 1543 last_rec - recid + 1, cmd, basedev, blksize);
1255 } 1544 }
1256 rq_for_each_segment(bv, req, iter) { 1545 rq_for_each_segment(bv, req, iter) {
1257 dst = page_address(bv->bv_page) + bv->bv_offset; 1546 dst = page_address(bv->bv_page) + bv->bv_offset;
@@ -1281,7 +1570,7 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1281 ccw[-1].flags |= CCW_FLAG_CC; 1570 ccw[-1].flags |= CCW_FLAG_CC;
1282 locate_record(ccw++, LO_data++, 1571 locate_record(ccw++, LO_data++,
1283 trkid, recoffs + 1, 1572 trkid, recoffs + 1,
1284 1, rcmd, device, count); 1573 1, rcmd, basedev, count);
1285 } 1574 }
1286 /* Locate record for standard blocks ? */ 1575 /* Locate record for standard blocks ? */
1287 if (private->uses_cdl && recid == 2*blk_per_trk) { 1576 if (private->uses_cdl && recid == 2*blk_per_trk) {
@@ -1289,7 +1578,7 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1289 locate_record(ccw++, LO_data++, 1578 locate_record(ccw++, LO_data++,
1290 trkid, recoffs + 1, 1579 trkid, recoffs + 1,
1291 last_rec - recid + 1, 1580 last_rec - recid + 1,
1292 cmd, device, count); 1581 cmd, basedev, count);
1293 } 1582 }
1294 /* Read/write ccw. */ 1583 /* Read/write ccw. */
1295 ccw[-1].flags |= CCW_FLAG_CC; 1584 ccw[-1].flags |= CCW_FLAG_CC;
@@ -1310,7 +1599,9 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1310 } 1599 }
1311 if (req->cmd_flags & REQ_FAILFAST) 1600 if (req->cmd_flags & REQ_FAILFAST)
1312 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1601 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1313 cqr->device = device; 1602 cqr->startdev = startdev;
1603 cqr->memdev = startdev;
1604 cqr->block = block;
1314 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 1605 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1315 cqr->lpm = private->path_data.ppm; 1606 cqr->lpm = private->path_data.ppm;
1316 cqr->retries = 256; 1607 cqr->retries = 256;
@@ -1333,10 +1624,10 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
1333 1624
1334 if (!dasd_page_cache) 1625 if (!dasd_page_cache)
1335 goto out; 1626 goto out;
1336 private = (struct dasd_eckd_private *) cqr->device->private; 1627 private = (struct dasd_eckd_private *) cqr->block->base->private;
1337 blksize = cqr->device->bp_block; 1628 blksize = cqr->block->bp_block;
1338 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 1629 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
1339 recid = req->sector >> cqr->device->s2b_shift; 1630 recid = req->sector >> cqr->block->s2b_shift;
1340 ccw = cqr->cpaddr; 1631 ccw = cqr->cpaddr;
1341 /* Skip over define extent & locate record. */ 1632 /* Skip over define extent & locate record. */
1342 ccw++; 1633 ccw++;
@@ -1367,10 +1658,71 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
1367 } 1658 }
1368out: 1659out:
1369 status = cqr->status == DASD_CQR_DONE; 1660 status = cqr->status == DASD_CQR_DONE;
1370 dasd_sfree_request(cqr, cqr->device); 1661 dasd_sfree_request(cqr, cqr->memdev);
1371 return status; 1662 return status;
1372} 1663}
1373 1664
1665/*
1666 * Modify ccw chain in cqr so it can be started on a base device.
1667 *
1668 * Note that this is not enough to restart the cqr!
1669 * Either reset cqr->startdev as well (summary unit check handling)
1670 * or restart via separate cqr (as in ERP handling).
1671 */
1672void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
1673{
1674 struct ccw1 *ccw;
1675 struct PFX_eckd_data *pfxdata;
1676
1677 ccw = cqr->cpaddr;
1678 pfxdata = cqr->data;
1679
1680 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
1681 pfxdata->validity.verify_base = 0;
1682 pfxdata->validity.hyper_pav = 0;
1683 }
1684}
1685
1686#define DASD_ECKD_CHANQ_MAX_SIZE 4
1687
1688static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
1689 struct dasd_block *block,
1690 struct request *req)
1691{
1692 struct dasd_eckd_private *private;
1693 struct dasd_device *startdev;
1694 unsigned long flags;
1695 struct dasd_ccw_req *cqr;
1696
1697 startdev = dasd_alias_get_start_dev(base);
1698 if (!startdev)
1699 startdev = base;
1700 private = (struct dasd_eckd_private *) startdev->private;
1701 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
1702 return ERR_PTR(-EBUSY);
1703
1704 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
1705 private->count++;
1706 cqr = dasd_eckd_build_cp(startdev, block, req);
1707 if (IS_ERR(cqr))
1708 private->count--;
1709 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
1710 return cqr;
1711}
1712
1713static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
1714 struct request *req)
1715{
1716 struct dasd_eckd_private *private;
1717 unsigned long flags;
1718
1719 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
1720 private = (struct dasd_eckd_private *) cqr->memdev->private;
1721 private->count--;
1722 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
1723 return dasd_eckd_free_cp(cqr, req);
1724}
1725
1374static int 1726static int
1375dasd_eckd_fill_info(struct dasd_device * device, 1727dasd_eckd_fill_info(struct dasd_device * device,
1376 struct dasd_information2_t * info) 1728 struct dasd_information2_t * info)
@@ -1384,9 +1736,9 @@ dasd_eckd_fill_info(struct dasd_device * device,
1384 info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 1736 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
1385 memcpy(info->characteristics, &private->rdc_data, 1737 memcpy(info->characteristics, &private->rdc_data,
1386 sizeof(struct dasd_eckd_characteristics)); 1738 sizeof(struct dasd_eckd_characteristics));
1387 info->confdata_size = sizeof (struct dasd_eckd_confdata); 1739 info->confdata_size = sizeof(struct dasd_eckd_confdata);
1388 memcpy(info->configuration_data, &private->conf_data, 1740 memcpy(info->configuration_data, &private->conf_data,
1389 sizeof (struct dasd_eckd_confdata)); 1741 sizeof(struct dasd_eckd_confdata));
1390 return 0; 1742 return 0;
1391} 1743}
1392 1744
@@ -1419,7 +1771,8 @@ dasd_eckd_release(struct dasd_device *device)
1419 cqr->cpaddr->flags |= CCW_FLAG_SLI; 1771 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1420 cqr->cpaddr->count = 32; 1772 cqr->cpaddr->count = 32;
1421 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 1773 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1422 cqr->device = device; 1774 cqr->startdev = device;
1775 cqr->memdev = device;
1423 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 1776 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1424 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1777 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1425 cqr->retries = 2; /* set retry counter to enable basic ERP */ 1778 cqr->retries = 2; /* set retry counter to enable basic ERP */
@@ -1429,7 +1782,7 @@ dasd_eckd_release(struct dasd_device *device)
1429 1782
1430 rc = dasd_sleep_on_immediatly(cqr); 1783 rc = dasd_sleep_on_immediatly(cqr);
1431 1784
1432 dasd_sfree_request(cqr, cqr->device); 1785 dasd_sfree_request(cqr, cqr->memdev);
1433 return rc; 1786 return rc;
1434} 1787}
1435 1788
@@ -1459,7 +1812,8 @@ dasd_eckd_reserve(struct dasd_device *device)
1459 cqr->cpaddr->flags |= CCW_FLAG_SLI; 1812 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1460 cqr->cpaddr->count = 32; 1813 cqr->cpaddr->count = 32;
1461 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 1814 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1462 cqr->device = device; 1815 cqr->startdev = device;
1816 cqr->memdev = device;
1463 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 1817 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1464 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1818 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1465 cqr->retries = 2; /* set retry counter to enable basic ERP */ 1819 cqr->retries = 2; /* set retry counter to enable basic ERP */
@@ -1469,7 +1823,7 @@ dasd_eckd_reserve(struct dasd_device *device)
1469 1823
1470 rc = dasd_sleep_on_immediatly(cqr); 1824 rc = dasd_sleep_on_immediatly(cqr);
1471 1825
1472 dasd_sfree_request(cqr, cqr->device); 1826 dasd_sfree_request(cqr, cqr->memdev);
1473 return rc; 1827 return rc;
1474} 1828}
1475 1829
@@ -1498,7 +1852,8 @@ dasd_eckd_steal_lock(struct dasd_device *device)
1498 cqr->cpaddr->flags |= CCW_FLAG_SLI; 1852 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1499 cqr->cpaddr->count = 32; 1853 cqr->cpaddr->count = 32;
1500 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 1854 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1501 cqr->device = device; 1855 cqr->startdev = device;
1856 cqr->memdev = device;
1502 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 1857 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1503 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1858 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1504 cqr->retries = 2; /* set retry counter to enable basic ERP */ 1859 cqr->retries = 2; /* set retry counter to enable basic ERP */
@@ -1508,7 +1863,7 @@ dasd_eckd_steal_lock(struct dasd_device *device)
1508 1863
1509 rc = dasd_sleep_on_immediatly(cqr); 1864 rc = dasd_sleep_on_immediatly(cqr);
1510 1865
1511 dasd_sfree_request(cqr, cqr->device); 1866 dasd_sfree_request(cqr, cqr->memdev);
1512 return rc; 1867 return rc;
1513} 1868}
1514 1869
@@ -1526,52 +1881,52 @@ dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1526 1881
1527 cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1882 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1528 1 /* PSF */ + 1 /* RSSD */ , 1883 1 /* PSF */ + 1 /* RSSD */ ,
1529 (sizeof (struct dasd_psf_prssd_data) + 1884 (sizeof(struct dasd_psf_prssd_data) +
1530 sizeof (struct dasd_rssd_perf_stats_t)), 1885 sizeof(struct dasd_rssd_perf_stats_t)),
1531 device); 1886 device);
1532 if (IS_ERR(cqr)) { 1887 if (IS_ERR(cqr)) {
1533 DEV_MESSAGE(KERN_WARNING, device, "%s", 1888 DEV_MESSAGE(KERN_WARNING, device, "%s",
1534 "Could not allocate initialization request"); 1889 "Could not allocate initialization request");
1535 return PTR_ERR(cqr); 1890 return PTR_ERR(cqr);
1536 } 1891 }
1537 cqr->device = device; 1892 cqr->startdev = device;
1893 cqr->memdev = device;
1538 cqr->retries = 0; 1894 cqr->retries = 0;
1539 cqr->expires = 10 * HZ; 1895 cqr->expires = 10 * HZ;
1540 1896
1541 /* Prepare for Read Subsystem Data */ 1897 /* Prepare for Read Subsystem Data */
1542 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1898 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1543 memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); 1899 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1544 prssdp->order = PSF_ORDER_PRSSD; 1900 prssdp->order = PSF_ORDER_PRSSD;
1545 prssdp->suborder = 0x01; /* Performance Statistics */ 1901 prssdp->suborder = 0x01; /* Performance Statistics */
1546 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 1902 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
1547 1903
1548 ccw = cqr->cpaddr; 1904 ccw = cqr->cpaddr;
1549 ccw->cmd_code = DASD_ECKD_CCW_PSF; 1905 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1550 ccw->count = sizeof (struct dasd_psf_prssd_data); 1906 ccw->count = sizeof(struct dasd_psf_prssd_data);
1551 ccw->flags |= CCW_FLAG_CC; 1907 ccw->flags |= CCW_FLAG_CC;
1552 ccw->cda = (__u32)(addr_t) prssdp; 1908 ccw->cda = (__u32)(addr_t) prssdp;
1553 1909
1554 /* Read Subsystem Data - Performance Statistics */ 1910 /* Read Subsystem Data - Performance Statistics */
1555 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 1911 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1556 memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); 1912 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1557 1913
1558 ccw++; 1914 ccw++;
1559 ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1915 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1560 ccw->count = sizeof (struct dasd_rssd_perf_stats_t); 1916 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1561 ccw->cda = (__u32)(addr_t) stats; 1917 ccw->cda = (__u32)(addr_t) stats;
1562 1918
1563 cqr->buildclk = get_clock(); 1919 cqr->buildclk = get_clock();
1564 cqr->status = DASD_CQR_FILLED; 1920 cqr->status = DASD_CQR_FILLED;
1565 rc = dasd_sleep_on(cqr); 1921 rc = dasd_sleep_on(cqr);
1566 if (rc == 0) { 1922 if (rc == 0) {
1567 /* Prepare for Read Subsystem Data */
1568 prssdp = (struct dasd_psf_prssd_data *) cqr->data; 1923 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1569 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 1924 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1570 if (copy_to_user(argp, stats, 1925 if (copy_to_user(argp, stats,
1571 sizeof(struct dasd_rssd_perf_stats_t))) 1926 sizeof(struct dasd_rssd_perf_stats_t)))
1572 rc = -EFAULT; 1927 rc = -EFAULT;
1573 } 1928 }
1574 dasd_sfree_request(cqr, cqr->device); 1929 dasd_sfree_request(cqr, cqr->memdev);
1575 return rc; 1930 return rc;
1576} 1931}
1577 1932
@@ -1594,7 +1949,7 @@ dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1594 1949
1595 rc = 0; 1950 rc = 0;
1596 if (copy_to_user(argp, (long *) &attrib, 1951 if (copy_to_user(argp, (long *) &attrib,
1597 sizeof (struct attrib_data_t))) 1952 sizeof(struct attrib_data_t)))
1598 rc = -EFAULT; 1953 rc = -EFAULT;
1599 1954
1600 return rc; 1955 return rc;
@@ -1627,8 +1982,10 @@ dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1627} 1982}
1628 1983
1629static int 1984static int
1630dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) 1985dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1631{ 1986{
1987 struct dasd_device *device = block->base;
1988
1632 switch (cmd) { 1989 switch (cmd) {
1633 case BIODASDGATTR: 1990 case BIODASDGATTR:
1634 return dasd_eckd_get_attrib(device, argp); 1991 return dasd_eckd_get_attrib(device, argp);
@@ -1685,9 +2042,8 @@ dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
1685 * Print sense data and related channel program. 2042 * Print sense data and related channel program.
1686 * Parts are printed because printk buffer is only 1024 bytes. 2043 * Parts are printed because printk buffer is only 1024 bytes.
1687 */ 2044 */
1688static void 2045static void dasd_eckd_dump_sense(struct dasd_device *device,
1689dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 2046 struct dasd_ccw_req *req, struct irb *irb)
1690 struct irb *irb)
1691{ 2047{
1692 char *page; 2048 char *page;
1693 struct ccw1 *first, *last, *fail, *from, *to; 2049 struct ccw1 *first, *last, *fail, *from, *to;
@@ -1743,37 +2099,40 @@ dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
1743 } 2099 }
1744 printk("%s", page); 2100 printk("%s", page);
1745 2101
1746 /* dump the Channel Program (max 140 Bytes per line) */ 2102 if (req) {
1747 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 2103 /* req == NULL for unsolicited interrupts */
1748 first = req->cpaddr; 2104 /* dump the Channel Program (max 140 Bytes per line) */
1749 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 2105 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
1750 to = min(first + 6, last); 2106 first = req->cpaddr;
1751 len = sprintf(page, KERN_ERR PRINTK_HEADER 2107 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
1752 " Related CP in req: %p\n", req); 2108 to = min(first + 6, last);
1753 dasd_eckd_dump_ccw_range(first, to, page + len); 2109 len = sprintf(page, KERN_ERR PRINTK_HEADER
1754 printk("%s", page); 2110 " Related CP in req: %p\n", req);
2111 dasd_eckd_dump_ccw_range(first, to, page + len);
2112 printk("%s", page);
1755 2113
1756 /* print failing CCW area (maximum 4) */ 2114 /* print failing CCW area (maximum 4) */
1757 /* scsw->cda is either valid or zero */ 2115 /* scsw->cda is either valid or zero */
1758 len = 0; 2116 len = 0;
1759 from = ++to; 2117 from = ++to;
1760 fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ 2118 fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */
1761 if (from < fail - 2) { 2119 if (from < fail - 2) {
1762 from = fail - 2; /* there is a gap - print header */ 2120 from = fail - 2; /* there is a gap - print header */
1763 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 2121 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
1764 } 2122 }
1765 to = min(fail + 1, last); 2123 to = min(fail + 1, last);
1766 len += dasd_eckd_dump_ccw_range(from, to, page + len); 2124 len += dasd_eckd_dump_ccw_range(from, to, page + len);
1767 2125
1768 /* print last CCWs (maximum 2) */ 2126 /* print last CCWs (maximum 2) */
1769 from = max(from, ++to); 2127 from = max(from, ++to);
1770 if (from < last - 1) { 2128 if (from < last - 1) {
1771 from = last - 1; /* there is a gap - print header */ 2129 from = last - 1; /* there is a gap - print header */
1772 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 2130 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
2131 }
2132 len += dasd_eckd_dump_ccw_range(from, last, page + len);
2133 if (len > 0)
2134 printk("%s", page);
1773 } 2135 }
1774 len += dasd_eckd_dump_ccw_range(from, last, page + len);
1775 if (len > 0)
1776 printk("%s", page);
1777 free_page((unsigned long) page); 2136 free_page((unsigned long) page);
1778} 2137}
1779 2138
@@ -1796,16 +2155,20 @@ static struct dasd_discipline dasd_eckd_discipline = {
1796 .ebcname = "ECKD", 2155 .ebcname = "ECKD",
1797 .max_blocks = 240, 2156 .max_blocks = 240,
1798 .check_device = dasd_eckd_check_characteristics, 2157 .check_device = dasd_eckd_check_characteristics,
2158 .uncheck_device = dasd_eckd_uncheck_device,
1799 .do_analysis = dasd_eckd_do_analysis, 2159 .do_analysis = dasd_eckd_do_analysis,
2160 .ready_to_online = dasd_eckd_ready_to_online,
2161 .online_to_ready = dasd_eckd_online_to_ready,
1800 .fill_geometry = dasd_eckd_fill_geometry, 2162 .fill_geometry = dasd_eckd_fill_geometry,
1801 .start_IO = dasd_start_IO, 2163 .start_IO = dasd_start_IO,
1802 .term_IO = dasd_term_IO, 2164 .term_IO = dasd_term_IO,
2165 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1803 .format_device = dasd_eckd_format_device, 2166 .format_device = dasd_eckd_format_device,
1804 .examine_error = dasd_eckd_examine_error,
1805 .erp_action = dasd_eckd_erp_action, 2167 .erp_action = dasd_eckd_erp_action,
1806 .erp_postaction = dasd_eckd_erp_postaction, 2168 .erp_postaction = dasd_eckd_erp_postaction,
1807 .build_cp = dasd_eckd_build_cp, 2169 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
1808 .free_cp = dasd_eckd_free_cp, 2170 .build_cp = dasd_eckd_build_alias_cp,
2171 .free_cp = dasd_eckd_free_alias_cp,
1809 .dump_sense = dasd_eckd_dump_sense, 2172 .dump_sense = dasd_eckd_dump_sense,
1810 .fill_info = dasd_eckd_fill_info, 2173 .fill_info = dasd_eckd_fill_info,
1811 .ioctl = dasd_eckd_ioctl, 2174 .ioctl = dasd_eckd_ioctl,
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index 712ff1650134..fc2509c939bc 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -39,6 +39,8 @@
39#define DASD_ECKD_CCW_READ_CKD_MT 0x9e 39#define DASD_ECKD_CCW_READ_CKD_MT 0x9e
40#define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d 40#define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d
41#define DASD_ECKD_CCW_RESERVE 0xB4 41#define DASD_ECKD_CCW_RESERVE 0xB4
42#define DASD_ECKD_CCW_PFX 0xE7
43#define DASD_ECKD_CCW_RSCK 0xF9
42 44
43/* 45/*
44 * Perform Subsystem Function / Sub-Orders 46 * Perform Subsystem Function / Sub-Orders
@@ -137,6 +139,25 @@ struct LO_eckd_data {
137 __u16 length; 139 __u16 length;
138} __attribute__ ((packed)); 140} __attribute__ ((packed));
139 141
142/* Prefix data for format 0x00 and 0x01 */
143struct PFX_eckd_data {
144 unsigned char format;
145 struct {
146 unsigned char define_extend:1;
147 unsigned char time_stamp:1;
148 unsigned char verify_base:1;
149 unsigned char hyper_pav:1;
150 unsigned char reserved:4;
151 } __attribute__ ((packed)) validity;
152 __u8 base_address;
153 __u8 aux;
154 __u8 base_lss;
155 __u8 reserved[7];
156 struct DE_eckd_data define_extend;
157 struct LO_eckd_data locate_record;
158 __u8 LO_extended_data[4];
159} __attribute__ ((packed));
160
140struct dasd_eckd_characteristics { 161struct dasd_eckd_characteristics {
141 __u16 cu_type; 162 __u16 cu_type;
142 struct { 163 struct {
@@ -254,7 +275,9 @@ struct dasd_eckd_confdata {
254 } __attribute__ ((packed)) ned; 275 } __attribute__ ((packed)) ned;
255 struct { 276 struct {
256 unsigned char flags; /* byte 0 */ 277 unsigned char flags; /* byte 0 */
257 unsigned char res2[7]; /* byte 1- 7 */ 278 unsigned char res1; /* byte 1 */
279 __u16 format; /* byte 2-3 */
280 unsigned char res2[4]; /* byte 4-7 */
258 unsigned char sua_flags; /* byte 8 */ 281 unsigned char sua_flags; /* byte 8 */
259 __u8 base_unit_addr; /* byte 9 */ 282 __u8 base_unit_addr; /* byte 9 */
260 unsigned char res3[22]; /* byte 10-31 */ 283 unsigned char res3[22]; /* byte 10-31 */
@@ -343,6 +366,11 @@ struct dasd_eckd_path {
343 __u8 npm; 366 __u8 npm;
344}; 367};
345 368
369struct dasd_rssd_features {
370 char feature[256];
371} __attribute__((packed));
372
373
346/* 374/*
347 * Perform Subsystem Function - Prepare for Read Subsystem Data 375 * Perform Subsystem Function - Prepare for Read Subsystem Data
348 */ 376 */
@@ -365,4 +393,99 @@ struct dasd_psf_ssc_data {
365 unsigned char reserved[59]; 393 unsigned char reserved[59];
366} __attribute__((packed)); 394} __attribute__((packed));
367 395
396
397/*
398 * some structures and definitions for alias handling
399 */
400struct dasd_unit_address_configuration {
401 struct {
402 char ua_type;
403 char base_ua;
404 } unit[256];
405} __attribute__((packed));
406
407
408#define MAX_DEVICES_PER_LCU 256
409
410/* flags on the LCU */
411#define NEED_UAC_UPDATE 0x01
412#define UPDATE_PENDING 0x02
413
414enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
415
416
417struct alias_root {
418 struct list_head serverlist;
419 spinlock_t lock;
420};
421
422struct alias_server {
423 struct list_head server;
424 struct dasd_uid uid;
425 struct list_head lculist;
426};
427
428struct summary_unit_check_work_data {
429 char reason;
430 struct dasd_device *device;
431 struct work_struct worker;
432};
433
434struct read_uac_work_data {
435 struct dasd_device *device;
436 struct delayed_work dwork;
437};
438
439struct alias_lcu {
440 struct list_head lcu;
441 struct dasd_uid uid;
442 enum pavtype pav;
443 char flags;
444 spinlock_t lock;
445 struct list_head grouplist;
446 struct list_head active_devices;
447 struct list_head inactive_devices;
448 struct dasd_unit_address_configuration *uac;
449 struct summary_unit_check_work_data suc_data;
450 struct read_uac_work_data ruac_data;
451 struct dasd_ccw_req *rsu_cqr;
452};
453
454struct alias_pav_group {
455 struct list_head group;
456 struct dasd_uid uid;
457 struct alias_lcu *lcu;
458 struct list_head baselist;
459 struct list_head aliaslist;
460 struct dasd_device *next;
461};
462
463
464struct dasd_eckd_private {
465 struct dasd_eckd_characteristics rdc_data;
466 struct dasd_eckd_confdata conf_data;
467 struct dasd_eckd_path path_data;
468 struct eckd_count count_area[5];
469 int init_cqr_status;
470 int uses_cdl;
471 struct attrib_data_t attrib; /* e.g. cache operations */
472 struct dasd_rssd_features features;
473
474 /* alias managemnet */
475 struct dasd_uid uid;
476 struct alias_pav_group *pavgroup;
477 struct alias_lcu *lcu;
478 int count;
479};
480
481
482
483int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
484void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
485int dasd_alias_add_device(struct dasd_device *);
486int dasd_alias_remove_device(struct dasd_device *);
487struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
488void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *);
489void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
490
368#endif /* DASD_ECKD_H */ 491#endif /* DASD_ECKD_H */
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c
index 0c081a664ee8..6e53ab606e97 100644
--- a/drivers/s390/block/dasd_eer.c
+++ b/drivers/s390/block/dasd_eer.c
@@ -336,7 +336,7 @@ static void dasd_eer_write_snss_trigger(struct dasd_device *device,
336 unsigned long flags; 336 unsigned long flags;
337 struct eerbuffer *eerb; 337 struct eerbuffer *eerb;
338 338
339 snss_rc = (cqr->status == DASD_CQR_FAILED) ? -EIO : 0; 339 snss_rc = (cqr->status == DASD_CQR_DONE) ? 0 : -EIO;
340 if (snss_rc) 340 if (snss_rc)
341 data_size = 0; 341 data_size = 0;
342 else 342 else
@@ -404,10 +404,11 @@ void dasd_eer_snss(struct dasd_device *device)
404 set_bit(DASD_FLAG_EER_SNSS, &device->flags); 404 set_bit(DASD_FLAG_EER_SNSS, &device->flags);
405 return; 405 return;
406 } 406 }
407 /* cdev is already locked, can't use dasd_add_request_head */
407 clear_bit(DASD_FLAG_EER_SNSS, &device->flags); 408 clear_bit(DASD_FLAG_EER_SNSS, &device->flags);
408 cqr->status = DASD_CQR_QUEUED; 409 cqr->status = DASD_CQR_QUEUED;
409 list_add(&cqr->list, &device->ccw_queue); 410 list_add(&cqr->devlist, &device->ccw_queue);
410 dasd_schedule_bh(device); 411 dasd_schedule_device_bh(device);
411} 412}
412 413
413/* 414/*
@@ -415,7 +416,7 @@ void dasd_eer_snss(struct dasd_device *device)
415 */ 416 */
416static void dasd_eer_snss_cb(struct dasd_ccw_req *cqr, void *data) 417static void dasd_eer_snss_cb(struct dasd_ccw_req *cqr, void *data)
417{ 418{
418 struct dasd_device *device = cqr->device; 419 struct dasd_device *device = cqr->startdev;
419 unsigned long flags; 420 unsigned long flags;
420 421
421 dasd_eer_write(device, cqr, DASD_EER_STATECHANGE); 422 dasd_eer_write(device, cqr, DASD_EER_STATECHANGE);
@@ -458,7 +459,7 @@ int dasd_eer_enable(struct dasd_device *device)
458 if (!cqr) 459 if (!cqr)
459 return -ENOMEM; 460 return -ENOMEM;
460 461
461 cqr->device = device; 462 cqr->startdev = device;
462 cqr->retries = 255; 463 cqr->retries = 255;
463 cqr->expires = 10 * HZ; 464 cqr->expires = 10 * HZ;
464 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 465 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
diff --git a/drivers/s390/block/dasd_erp.c b/drivers/s390/block/dasd_erp.c
index caa5d91420f8..8f10000851a3 100644
--- a/drivers/s390/block/dasd_erp.c
+++ b/drivers/s390/block/dasd_erp.c
@@ -46,6 +46,8 @@ dasd_alloc_erp_request(char *magic, int cplength, int datasize,
46 if (cqr == NULL) 46 if (cqr == NULL)
47 return ERR_PTR(-ENOMEM); 47 return ERR_PTR(-ENOMEM);
48 memset(cqr, 0, sizeof(struct dasd_ccw_req)); 48 memset(cqr, 0, sizeof(struct dasd_ccw_req));
49 INIT_LIST_HEAD(&cqr->devlist);
50 INIT_LIST_HEAD(&cqr->blocklist);
49 data = (char *) cqr + ((sizeof(struct dasd_ccw_req) + 7L) & -8L); 51 data = (char *) cqr + ((sizeof(struct dasd_ccw_req) + 7L) & -8L);
50 cqr->cpaddr = NULL; 52 cqr->cpaddr = NULL;
51 if (cplength > 0) { 53 if (cplength > 0) {
@@ -66,7 +68,7 @@ dasd_alloc_erp_request(char *magic, int cplength, int datasize,
66} 68}
67 69
68void 70void
69dasd_free_erp_request(struct dasd_ccw_req * cqr, struct dasd_device * device) 71dasd_free_erp_request(struct dasd_ccw_req *cqr, struct dasd_device * device)
70{ 72{
71 unsigned long flags; 73 unsigned long flags;
72 74
@@ -81,11 +83,11 @@ dasd_free_erp_request(struct dasd_ccw_req * cqr, struct dasd_device * device)
81 * dasd_default_erp_action just retries the current cqr 83 * dasd_default_erp_action just retries the current cqr
82 */ 84 */
83struct dasd_ccw_req * 85struct dasd_ccw_req *
84dasd_default_erp_action(struct dasd_ccw_req * cqr) 86dasd_default_erp_action(struct dasd_ccw_req *cqr)
85{ 87{
86 struct dasd_device *device; 88 struct dasd_device *device;
87 89
88 device = cqr->device; 90 device = cqr->startdev;
89 91
90 /* just retry - there is nothing to save ... I got no sense data.... */ 92 /* just retry - there is nothing to save ... I got no sense data.... */
91 if (cqr->retries > 0) { 93 if (cqr->retries > 0) {
@@ -93,12 +95,12 @@ dasd_default_erp_action(struct dasd_ccw_req * cqr)
93 "default ERP called (%i retries left)", 95 "default ERP called (%i retries left)",
94 cqr->retries); 96 cqr->retries);
95 cqr->lpm = LPM_ANYPATH; 97 cqr->lpm = LPM_ANYPATH;
96 cqr->status = DASD_CQR_QUEUED; 98 cqr->status = DASD_CQR_FILLED;
97 } else { 99 } else {
98 DEV_MESSAGE (KERN_WARNING, device, "%s", 100 DEV_MESSAGE (KERN_WARNING, device, "%s",
99 "default ERP called (NO retry left)"); 101 "default ERP called (NO retry left)");
100 cqr->status = DASD_CQR_FAILED; 102 cqr->status = DASD_CQR_FAILED;
101 cqr->stopclk = get_clock (); 103 cqr->stopclk = get_clock();
102 } 104 }
103 return cqr; 105 return cqr;
104} /* end dasd_default_erp_action */ 106} /* end dasd_default_erp_action */
@@ -117,15 +119,12 @@ dasd_default_erp_action(struct dasd_ccw_req * cqr)
117 * RETURN VALUES 119 * RETURN VALUES
118 * cqr pointer to the original CQR 120 * cqr pointer to the original CQR
119 */ 121 */
120struct dasd_ccw_req * 122struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *cqr)
121dasd_default_erp_postaction(struct dasd_ccw_req * cqr)
122{ 123{
123 struct dasd_device *device;
124 int success; 124 int success;
125 125
126 BUG_ON(cqr->refers == NULL || cqr->function == NULL); 126 BUG_ON(cqr->refers == NULL || cqr->function == NULL);
127 127
128 device = cqr->device;
129 success = cqr->status == DASD_CQR_DONE; 128 success = cqr->status == DASD_CQR_DONE;
130 129
131 /* free all ERPs - but NOT the original cqr */ 130 /* free all ERPs - but NOT the original cqr */
@@ -133,10 +132,10 @@ dasd_default_erp_postaction(struct dasd_ccw_req * cqr)
133 struct dasd_ccw_req *refers; 132 struct dasd_ccw_req *refers;
134 133
135 refers = cqr->refers; 134 refers = cqr->refers;
136 /* remove the request from the device queue */ 135 /* remove the request from the block queue */
137 list_del(&cqr->list); 136 list_del(&cqr->blocklist);
138 /* free the finished erp request */ 137 /* free the finished erp request */
139 dasd_free_erp_request(cqr, device); 138 dasd_free_erp_request(cqr, cqr->memdev);
140 cqr = refers; 139 cqr = refers;
141 } 140 }
142 141
@@ -157,7 +156,7 @@ dasd_log_sense(struct dasd_ccw_req *cqr, struct irb *irb)
157{ 156{
158 struct dasd_device *device; 157 struct dasd_device *device;
159 158
160 device = cqr->device; 159 device = cqr->startdev;
161 /* dump sense data */ 160 /* dump sense data */
162 if (device->discipline && device->discipline->dump_sense) 161 if (device->discipline && device->discipline->dump_sense)
163 device->discipline->dump_sense(device, cqr, irb); 162 device->discipline->dump_sense(device, cqr, irb);
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index 1d95822e0b8e..d13ea05089a7 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -117,6 +117,7 @@ locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,
117static int 117static int
118dasd_fba_check_characteristics(struct dasd_device *device) 118dasd_fba_check_characteristics(struct dasd_device *device)
119{ 119{
120 struct dasd_block *block;
120 struct dasd_fba_private *private; 121 struct dasd_fba_private *private;
121 struct ccw_device *cdev = device->cdev; 122 struct ccw_device *cdev = device->cdev;
122 void *rdc_data; 123 void *rdc_data;
@@ -133,6 +134,16 @@ dasd_fba_check_characteristics(struct dasd_device *device)
133 } 134 }
134 device->private = (void *) private; 135 device->private = (void *) private;
135 } 136 }
137 block = dasd_alloc_block();
138 if (IS_ERR(block)) {
139 DEV_MESSAGE(KERN_WARNING, device, "%s",
140 "could not allocate dasd block structure");
141 kfree(device->private);
142 return PTR_ERR(block);
143 }
144 device->block = block;
145 block->base = device;
146
136 /* Read Device Characteristics */ 147 /* Read Device Characteristics */
137 rdc_data = (void *) &(private->rdc_data); 148 rdc_data = (void *) &(private->rdc_data);
138 rc = dasd_generic_read_dev_chars(device, "FBA ", &rdc_data, 32); 149 rc = dasd_generic_read_dev_chars(device, "FBA ", &rdc_data, 32);
@@ -155,60 +166,37 @@ dasd_fba_check_characteristics(struct dasd_device *device)
155 return 0; 166 return 0;
156} 167}
157 168
158static int 169static int dasd_fba_do_analysis(struct dasd_block *block)
159dasd_fba_do_analysis(struct dasd_device *device)
160{ 170{
161 struct dasd_fba_private *private; 171 struct dasd_fba_private *private;
162 int sb, rc; 172 int sb, rc;
163 173
164 private = (struct dasd_fba_private *) device->private; 174 private = (struct dasd_fba_private *) block->base->private;
165 rc = dasd_check_blocksize(private->rdc_data.blk_size); 175 rc = dasd_check_blocksize(private->rdc_data.blk_size);
166 if (rc) { 176 if (rc) {
167 DEV_MESSAGE(KERN_INFO, device, "unknown blocksize %d", 177 DEV_MESSAGE(KERN_INFO, block->base, "unknown blocksize %d",
168 private->rdc_data.blk_size); 178 private->rdc_data.blk_size);
169 return rc; 179 return rc;
170 } 180 }
171 device->blocks = private->rdc_data.blk_bdsa; 181 block->blocks = private->rdc_data.blk_bdsa;
172 device->bp_block = private->rdc_data.blk_size; 182 block->bp_block = private->rdc_data.blk_size;
173 device->s2b_shift = 0; /* bits to shift 512 to get a block */ 183 block->s2b_shift = 0; /* bits to shift 512 to get a block */
174 for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) 184 for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
175 device->s2b_shift++; 185 block->s2b_shift++;
176 return 0; 186 return 0;
177} 187}
178 188
179static int 189static int dasd_fba_fill_geometry(struct dasd_block *block,
180dasd_fba_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) 190 struct hd_geometry *geo)
181{ 191{
182 if (dasd_check_blocksize(device->bp_block) != 0) 192 if (dasd_check_blocksize(block->bp_block) != 0)
183 return -EINVAL; 193 return -EINVAL;
184 geo->cylinders = (device->blocks << device->s2b_shift) >> 10; 194 geo->cylinders = (block->blocks << block->s2b_shift) >> 10;
185 geo->heads = 16; 195 geo->heads = 16;
186 geo->sectors = 128 >> device->s2b_shift; 196 geo->sectors = 128 >> block->s2b_shift;
187 return 0; 197 return 0;
188} 198}
189 199
190static dasd_era_t
191dasd_fba_examine_error(struct dasd_ccw_req * cqr, struct irb * irb)
192{
193 struct dasd_device *device;
194 struct ccw_device *cdev;
195
196 device = (struct dasd_device *) cqr->device;
197 if (irb->scsw.cstat == 0x00 &&
198 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
199 return dasd_era_none;
200
201 cdev = device->cdev;
202 switch (cdev->id.dev_type) {
203 case 0x3370:
204 return dasd_3370_erp_examine(cqr, irb);
205 case 0x9336:
206 return dasd_9336_erp_examine(cqr, irb);
207 default:
208 return dasd_era_recover;
209 }
210}
211
212static dasd_erp_fn_t 200static dasd_erp_fn_t
213dasd_fba_erp_action(struct dasd_ccw_req * cqr) 201dasd_fba_erp_action(struct dasd_ccw_req * cqr)
214{ 202{
@@ -221,13 +209,34 @@ dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
221 if (cqr->function == dasd_default_erp_action) 209 if (cqr->function == dasd_default_erp_action)
222 return dasd_default_erp_postaction; 210 return dasd_default_erp_postaction;
223 211
224 DEV_MESSAGE(KERN_WARNING, cqr->device, "unknown ERP action %p", 212 DEV_MESSAGE(KERN_WARNING, cqr->startdev, "unknown ERP action %p",
225 cqr->function); 213 cqr->function);
226 return NULL; 214 return NULL;
227} 215}
228 216
229static struct dasd_ccw_req * 217static void dasd_fba_handle_unsolicited_interrupt(struct dasd_device *device,
230dasd_fba_build_cp(struct dasd_device * device, struct request *req) 218 struct irb *irb)
219{
220 char mask;
221
222 /* first of all check for state change pending interrupt */
223 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
224 if ((irb->scsw.dstat & mask) == mask) {
225 dasd_generic_handle_state_change(device);
226 return;
227 }
228
229 /* check for unsolicited interrupts */
230 DEV_MESSAGE(KERN_DEBUG, device, "%s",
231 "unsolicited interrupt received");
232 device->discipline->dump_sense(device, NULL, irb);
233 dasd_schedule_device_bh(device);
234 return;
235};
236
237static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
238 struct dasd_block *block,
239 struct request *req)
231{ 240{
232 struct dasd_fba_private *private; 241 struct dasd_fba_private *private;
233 unsigned long *idaws; 242 unsigned long *idaws;
@@ -242,17 +251,17 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req)
242 unsigned int blksize, off; 251 unsigned int blksize, off;
243 unsigned char cmd; 252 unsigned char cmd;
244 253
245 private = (struct dasd_fba_private *) device->private; 254 private = (struct dasd_fba_private *) block->base->private;
246 if (rq_data_dir(req) == READ) { 255 if (rq_data_dir(req) == READ) {
247 cmd = DASD_FBA_CCW_READ; 256 cmd = DASD_FBA_CCW_READ;
248 } else if (rq_data_dir(req) == WRITE) { 257 } else if (rq_data_dir(req) == WRITE) {
249 cmd = DASD_FBA_CCW_WRITE; 258 cmd = DASD_FBA_CCW_WRITE;
250 } else 259 } else
251 return ERR_PTR(-EINVAL); 260 return ERR_PTR(-EINVAL);
252 blksize = device->bp_block; 261 blksize = block->bp_block;
253 /* Calculate record id of first and last block. */ 262 /* Calculate record id of first and last block. */
254 first_rec = req->sector >> device->s2b_shift; 263 first_rec = req->sector >> block->s2b_shift;
255 last_rec = (req->sector + req->nr_sectors - 1) >> device->s2b_shift; 264 last_rec = (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
256 /* Check struct bio and count the number of blocks for the request. */ 265 /* Check struct bio and count the number of blocks for the request. */
257 count = 0; 266 count = 0;
258 cidaw = 0; 267 cidaw = 0;
@@ -260,7 +269,7 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req)
260 if (bv->bv_len & (blksize - 1)) 269 if (bv->bv_len & (blksize - 1))
261 /* Fba can only do full blocks. */ 270 /* Fba can only do full blocks. */
262 return ERR_PTR(-EINVAL); 271 return ERR_PTR(-EINVAL);
263 count += bv->bv_len >> (device->s2b_shift + 9); 272 count += bv->bv_len >> (block->s2b_shift + 9);
264#if defined(CONFIG_64BIT) 273#if defined(CONFIG_64BIT)
265 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 274 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
266 cidaw += bv->bv_len / blksize; 275 cidaw += bv->bv_len / blksize;
@@ -284,13 +293,13 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req)
284 } 293 }
285 /* Allocate the ccw request. */ 294 /* Allocate the ccw request. */
286 cqr = dasd_smalloc_request(dasd_fba_discipline.name, 295 cqr = dasd_smalloc_request(dasd_fba_discipline.name,
287 cplength, datasize, device); 296 cplength, datasize, memdev);
288 if (IS_ERR(cqr)) 297 if (IS_ERR(cqr))
289 return cqr; 298 return cqr;
290 ccw = cqr->cpaddr; 299 ccw = cqr->cpaddr;
291 /* First ccw is define extent. */ 300 /* First ccw is define extent. */
292 define_extent(ccw++, cqr->data, rq_data_dir(req), 301 define_extent(ccw++, cqr->data, rq_data_dir(req),
293 device->bp_block, req->sector, req->nr_sectors); 302 block->bp_block, req->sector, req->nr_sectors);
294 /* Build locate_record + read/write ccws. */ 303 /* Build locate_record + read/write ccws. */
295 idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data)); 304 idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
296 LO_data = (struct LO_fba_data *) (idaws + cidaw); 305 LO_data = (struct LO_fba_data *) (idaws + cidaw);
@@ -326,7 +335,7 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req)
326 ccw[-1].flags |= CCW_FLAG_CC; 335 ccw[-1].flags |= CCW_FLAG_CC;
327 } 336 }
328 ccw->cmd_code = cmd; 337 ccw->cmd_code = cmd;
329 ccw->count = device->bp_block; 338 ccw->count = block->bp_block;
330 if (idal_is_needed(dst, blksize)) { 339 if (idal_is_needed(dst, blksize)) {
331 ccw->cda = (__u32)(addr_t) idaws; 340 ccw->cda = (__u32)(addr_t) idaws;
332 ccw->flags = CCW_FLAG_IDA; 341 ccw->flags = CCW_FLAG_IDA;
@@ -342,7 +351,9 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req)
342 } 351 }
343 if (req->cmd_flags & REQ_FAILFAST) 352 if (req->cmd_flags & REQ_FAILFAST)
344 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 353 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
345 cqr->device = device; 354 cqr->startdev = memdev;
355 cqr->memdev = memdev;
356 cqr->block = block;
346 cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 357 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
347 cqr->retries = 32; 358 cqr->retries = 32;
348 cqr->buildclk = get_clock(); 359 cqr->buildclk = get_clock();
@@ -363,8 +374,8 @@ dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
363 374
364 if (!dasd_page_cache) 375 if (!dasd_page_cache)
365 goto out; 376 goto out;
366 private = (struct dasd_fba_private *) cqr->device->private; 377 private = (struct dasd_fba_private *) cqr->block->base->private;
367 blksize = cqr->device->bp_block; 378 blksize = cqr->block->bp_block;
368 ccw = cqr->cpaddr; 379 ccw = cqr->cpaddr;
369 /* Skip over define extent & locate record. */ 380 /* Skip over define extent & locate record. */
370 ccw++; 381 ccw++;
@@ -394,10 +405,15 @@ dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
394 } 405 }
395out: 406out:
396 status = cqr->status == DASD_CQR_DONE; 407 status = cqr->status == DASD_CQR_DONE;
397 dasd_sfree_request(cqr, cqr->device); 408 dasd_sfree_request(cqr, cqr->memdev);
398 return status; 409 return status;
399} 410}
400 411
412static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
413{
414 cqr->status = DASD_CQR_FILLED;
415};
416
401static int 417static int
402dasd_fba_fill_info(struct dasd_device * device, 418dasd_fba_fill_info(struct dasd_device * device,
403 struct dasd_information2_t * info) 419 struct dasd_information2_t * info)
@@ -546,9 +562,10 @@ static struct dasd_discipline dasd_fba_discipline = {
546 .fill_geometry = dasd_fba_fill_geometry, 562 .fill_geometry = dasd_fba_fill_geometry,
547 .start_IO = dasd_start_IO, 563 .start_IO = dasd_start_IO,
548 .term_IO = dasd_term_IO, 564 .term_IO = dasd_term_IO,
549 .examine_error = dasd_fba_examine_error, 565 .handle_terminated_request = dasd_fba_handle_terminated_request,
550 .erp_action = dasd_fba_erp_action, 566 .erp_action = dasd_fba_erp_action,
551 .erp_postaction = dasd_fba_erp_postaction, 567 .erp_postaction = dasd_fba_erp_postaction,
568 .handle_unsolicited_interrupt = dasd_fba_handle_unsolicited_interrupt,
552 .build_cp = dasd_fba_build_cp, 569 .build_cp = dasd_fba_build_cp,
553 .free_cp = dasd_fba_free_cp, 570 .free_cp = dasd_fba_free_cp,
554 .dump_sense = dasd_fba_dump_sense, 571 .dump_sense = dasd_fba_dump_sense,
diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index 47ba4462708d..aee6565aaf98 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -25,14 +25,15 @@
25/* 25/*
26 * Allocate and register gendisk structure for device. 26 * Allocate and register gendisk structure for device.
27 */ 27 */
28int 28int dasd_gendisk_alloc(struct dasd_block *block)
29dasd_gendisk_alloc(struct dasd_device *device)
30{ 29{
31 struct gendisk *gdp; 30 struct gendisk *gdp;
31 struct dasd_device *base;
32 int len; 32 int len;
33 33
34 /* Make sure the minor for this device exists. */ 34 /* Make sure the minor for this device exists. */
35 if (device->devindex >= DASD_PER_MAJOR) 35 base = block->base;
36 if (base->devindex >= DASD_PER_MAJOR)
36 return -EBUSY; 37 return -EBUSY;
37 38
38 gdp = alloc_disk(1 << DASD_PARTN_BITS); 39 gdp = alloc_disk(1 << DASD_PARTN_BITS);
@@ -41,9 +42,9 @@ dasd_gendisk_alloc(struct dasd_device *device)
41 42
42 /* Initialize gendisk structure. */ 43 /* Initialize gendisk structure. */
43 gdp->major = DASD_MAJOR; 44 gdp->major = DASD_MAJOR;
44 gdp->first_minor = device->devindex << DASD_PARTN_BITS; 45 gdp->first_minor = base->devindex << DASD_PARTN_BITS;
45 gdp->fops = &dasd_device_operations; 46 gdp->fops = &dasd_device_operations;
46 gdp->driverfs_dev = &device->cdev->dev; 47 gdp->driverfs_dev = &base->cdev->dev;
47 48
48 /* 49 /*
49 * Set device name. 50 * Set device name.
@@ -53,53 +54,51 @@ dasd_gendisk_alloc(struct dasd_device *device)
53 * dasdaaaa - dasdzzzz : 456976 devices, added up = 475252 54 * dasdaaaa - dasdzzzz : 456976 devices, added up = 475252
54 */ 55 */
55 len = sprintf(gdp->disk_name, "dasd"); 56 len = sprintf(gdp->disk_name, "dasd");
56 if (device->devindex > 25) { 57 if (base->devindex > 25) {
57 if (device->devindex > 701) { 58 if (base->devindex > 701) {
58 if (device->devindex > 18277) 59 if (base->devindex > 18277)
59 len += sprintf(gdp->disk_name + len, "%c", 60 len += sprintf(gdp->disk_name + len, "%c",
60 'a'+(((device->devindex-18278) 61 'a'+(((base->devindex-18278)
61 /17576)%26)); 62 /17576)%26));
62 len += sprintf(gdp->disk_name + len, "%c", 63 len += sprintf(gdp->disk_name + len, "%c",
63 'a'+(((device->devindex-702)/676)%26)); 64 'a'+(((base->devindex-702)/676)%26));
64 } 65 }
65 len += sprintf(gdp->disk_name + len, "%c", 66 len += sprintf(gdp->disk_name + len, "%c",
66 'a'+(((device->devindex-26)/26)%26)); 67 'a'+(((base->devindex-26)/26)%26));
67 } 68 }
68 len += sprintf(gdp->disk_name + len, "%c", 'a'+(device->devindex%26)); 69 len += sprintf(gdp->disk_name + len, "%c", 'a'+(base->devindex%26));
69 70
70 if (device->features & DASD_FEATURE_READONLY) 71 if (block->base->features & DASD_FEATURE_READONLY)
71 set_disk_ro(gdp, 1); 72 set_disk_ro(gdp, 1);
72 gdp->private_data = device; 73 gdp->private_data = block;
73 gdp->queue = device->request_queue; 74 gdp->queue = block->request_queue;
74 device->gdp = gdp; 75 block->gdp = gdp;
75 set_capacity(device->gdp, 0); 76 set_capacity(block->gdp, 0);
76 add_disk(device->gdp); 77 add_disk(block->gdp);
77 return 0; 78 return 0;
78} 79}
79 80
80/* 81/*
81 * Unregister and free gendisk structure for device. 82 * Unregister and free gendisk structure for device.
82 */ 83 */
83void 84void dasd_gendisk_free(struct dasd_block *block)
84dasd_gendisk_free(struct dasd_device *device)
85{ 85{
86 if (device->gdp) { 86 if (block->gdp) {
87 del_gendisk(device->gdp); 87 del_gendisk(block->gdp);
88 device->gdp->queue = NULL; 88 block->gdp->queue = NULL;
89 put_disk(device->gdp); 89 put_disk(block->gdp);
90 device->gdp = NULL; 90 block->gdp = NULL;
91 } 91 }
92} 92}
93 93
94/* 94/*
95 * Trigger a partition detection. 95 * Trigger a partition detection.
96 */ 96 */
97int 97int dasd_scan_partitions(struct dasd_block *block)
98dasd_scan_partitions(struct dasd_device * device)
99{ 98{
100 struct block_device *bdev; 99 struct block_device *bdev;
101 100
102 bdev = bdget_disk(device->gdp, 0); 101 bdev = bdget_disk(block->gdp, 0);
103 if (!bdev || blkdev_get(bdev, FMODE_READ, 1) < 0) 102 if (!bdev || blkdev_get(bdev, FMODE_READ, 1) < 0)
104 return -ENODEV; 103 return -ENODEV;
105 /* 104 /*
@@ -117,7 +116,7 @@ dasd_scan_partitions(struct dasd_device * device)
117 * is why the assignment to device->bdev is done AFTER 116 * is why the assignment to device->bdev is done AFTER
118 * the BLKRRPART ioctl. 117 * the BLKRRPART ioctl.
119 */ 118 */
120 device->bdev = bdev; 119 block->bdev = bdev;
121 return 0; 120 return 0;
122} 121}
123 122
@@ -125,8 +124,7 @@ dasd_scan_partitions(struct dasd_device * device)
125 * Remove all inodes in the system for a device, delete the 124 * Remove all inodes in the system for a device, delete the
126 * partitions and make device unusable by setting its size to zero. 125 * partitions and make device unusable by setting its size to zero.
127 */ 126 */
128void 127void dasd_destroy_partitions(struct dasd_block *block)
129dasd_destroy_partitions(struct dasd_device * device)
130{ 128{
131 /* The two structs have 168/176 byte on 31/64 bit. */ 129 /* The two structs have 168/176 byte on 31/64 bit. */
132 struct blkpg_partition bpart; 130 struct blkpg_partition bpart;
@@ -137,8 +135,8 @@ dasd_destroy_partitions(struct dasd_device * device)
137 * Get the bdev pointer from the device structure and clear 135 * Get the bdev pointer from the device structure and clear
138 * device->bdev to lower the offline open_count limit again. 136 * device->bdev to lower the offline open_count limit again.
139 */ 137 */
140 bdev = device->bdev; 138 bdev = block->bdev;
141 device->bdev = NULL; 139 block->bdev = NULL;
142 140
143 /* 141 /*
144 * See fs/partition/check.c:delete_partition 142 * See fs/partition/check.c:delete_partition
@@ -149,17 +147,16 @@ dasd_destroy_partitions(struct dasd_device * device)
149 memset(&barg, 0, sizeof(struct blkpg_ioctl_arg)); 147 memset(&barg, 0, sizeof(struct blkpg_ioctl_arg));
150 barg.data = (void __force __user *) &bpart; 148 barg.data = (void __force __user *) &bpart;
151 barg.op = BLKPG_DEL_PARTITION; 149 barg.op = BLKPG_DEL_PARTITION;
152 for (bpart.pno = device->gdp->minors - 1; bpart.pno > 0; bpart.pno--) 150 for (bpart.pno = block->gdp->minors - 1; bpart.pno > 0; bpart.pno--)
153 ioctl_by_bdev(bdev, BLKPG, (unsigned long) &barg); 151 ioctl_by_bdev(bdev, BLKPG, (unsigned long) &barg);
154 152
155 invalidate_partition(device->gdp, 0); 153 invalidate_partition(block->gdp, 0);
156 /* Matching blkdev_put to the blkdev_get in dasd_scan_partitions. */ 154 /* Matching blkdev_put to the blkdev_get in dasd_scan_partitions. */
157 blkdev_put(bdev); 155 blkdev_put(bdev);
158 set_capacity(device->gdp, 0); 156 set_capacity(block->gdp, 0);
159} 157}
160 158
161int 159int dasd_gendisk_init(void)
162dasd_gendisk_init(void)
163{ 160{
164 int rc; 161 int rc;
165 162
@@ -174,8 +171,7 @@ dasd_gendisk_init(void)
174 return 0; 171 return 0;
175} 172}
176 173
177void 174void dasd_gendisk_exit(void)
178dasd_gendisk_exit(void)
179{ 175{
180 unregister_blkdev(DASD_MAJOR, "dasd"); 176 unregister_blkdev(DASD_MAJOR, "dasd");
181} 177}
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index d427daeef511..44b2984dfbee 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -64,13 +64,7 @@
64 * SECTION: Type definitions 64 * SECTION: Type definitions
65 */ 65 */
66struct dasd_device; 66struct dasd_device;
67 67struct dasd_block;
68typedef enum {
69 dasd_era_fatal = -1, /* no chance to recover */
70 dasd_era_none = 0, /* don't recover, everything alright */
71 dasd_era_msg = 1, /* don't recover, just report... */
72 dasd_era_recover = 2 /* recovery action recommended */
73} dasd_era_t;
74 68
75/* BIT DEFINITIONS FOR SENSE DATA */ 69/* BIT DEFINITIONS FOR SENSE DATA */
76#define DASD_SENSE_BIT_0 0x80 70#define DASD_SENSE_BIT_0 0x80
@@ -151,19 +145,22 @@ do { \
151 145
152struct dasd_ccw_req { 146struct dasd_ccw_req {
153 unsigned int magic; /* Eye catcher */ 147 unsigned int magic; /* Eye catcher */
154 struct list_head list; /* list_head for request queueing. */ 148 struct list_head devlist; /* for dasd_device request queue */
149 struct list_head blocklist; /* for dasd_block request queue */
155 150
156 /* Where to execute what... */ 151 /* Where to execute what... */
157 struct dasd_device *device; /* device the request is for */ 152 struct dasd_block *block; /* the originating block device */
153 struct dasd_device *memdev; /* the device used to allocate this */
154 struct dasd_device *startdev; /* device the request is started on */
158 struct ccw1 *cpaddr; /* address of channel program */ 155 struct ccw1 *cpaddr; /* address of channel program */
159 char status; /* status of this request */ 156 char status; /* status of this request */
160 short retries; /* A retry counter */ 157 short retries; /* A retry counter */
161 unsigned long flags; /* flags of this request */ 158 unsigned long flags; /* flags of this request */
162 159
163 /* ... and how */ 160 /* ... and how */
164 unsigned long starttime; /* jiffies time of request start */ 161 unsigned long starttime; /* jiffies time of request start */
165 int expires; /* expiration period in jiffies */ 162 int expires; /* expiration period in jiffies */
166 char lpm; /* logical path mask */ 163 char lpm; /* logical path mask */
167 void *data; /* pointer to data area */ 164 void *data; /* pointer to data area */
168 165
169 /* these are important for recovering erroneous requests */ 166 /* these are important for recovering erroneous requests */
@@ -178,20 +175,27 @@ struct dasd_ccw_req {
178 unsigned long long endclk; /* TOD-clock of request termination */ 175 unsigned long long endclk; /* TOD-clock of request termination */
179 176
180 /* Callback that is called after reaching final status. */ 177 /* Callback that is called after reaching final status. */
181 void (*callback)(struct dasd_ccw_req *, void *data); 178 void (*callback)(struct dasd_ccw_req *, void *data);
182 void *callback_data; 179 void *callback_data;
183}; 180};
184 181
185/* 182/*
186 * dasd_ccw_req -> status can be: 183 * dasd_ccw_req -> status can be:
187 */ 184 */
188#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ 185#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */
189#define DASD_CQR_QUEUED 0x01 /* request is queued to be processed */ 186#define DASD_CQR_DONE 0x01 /* request is completed successfully */
190#define DASD_CQR_IN_IO 0x02 /* request is currently in IO */ 187#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */
191#define DASD_CQR_DONE 0x03 /* request is completed successfully */ 188#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */
192#define DASD_CQR_ERROR 0x04 /* request is completed with error */ 189#define DASD_CQR_FAILED 0x04 /* request is finally failed */
193#define DASD_CQR_FAILED 0x05 /* request is finally failed */ 190#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */
194#define DASD_CQR_CLEAR 0x06 /* request is clear pending */ 191
192#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */
193#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */
194#define DASD_CQR_ERROR 0x82 /* request is completed with error */
195#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */
196#define DASD_CQR_CLEARED 0x84 /* request was cleared */
197#define DASD_CQR_SUCCESS 0x85 /* request was successfull */
198
195 199
196/* per dasd_ccw_req flags */ 200/* per dasd_ccw_req flags */
197#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ 201#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
@@ -214,52 +218,71 @@ struct dasd_discipline {
214 218
215 struct list_head list; /* used for list of disciplines */ 219 struct list_head list; /* used for list of disciplines */
216 220
217 /* 221 /*
218 * Device recognition functions. check_device is used to verify 222 * Device recognition functions. check_device is used to verify
219 * the sense data and the information returned by read device 223 * the sense data and the information returned by read device
220 * characteristics. It returns 0 if the discipline can be used 224 * characteristics. It returns 0 if the discipline can be used
221 * for the device in question. 225 * for the device in question. uncheck_device is called during
222 * do_analysis is used in the step from device state "basic" to 226 * device shutdown to deregister a device from its discipline.
223 * state "accept". It returns 0 if the device can be made ready, 227 */
224 * it returns -EMEDIUMTYPE if the device can't be made ready or 228 int (*check_device) (struct dasd_device *);
225 * -EAGAIN if do_analysis started a ccw that needs to complete 229 void (*uncheck_device) (struct dasd_device *);
226 * before the analysis may be repeated. 230
227 */ 231 /*
228 int (*check_device)(struct dasd_device *); 232 * do_analysis is used in the step from device state "basic" to
229 int (*do_analysis) (struct dasd_device *); 233 * state "accept". It returns 0 if the device can be made ready,
230 234 * it returns -EMEDIUMTYPE if the device can't be made ready or
231 /* 235 * -EAGAIN if do_analysis started a ccw that needs to complete
232 * Device operation functions. build_cp creates a ccw chain for 236 * before the analysis may be repeated.
233 * a block device request, start_io starts the request and 237 */
234 * term_IO cancels it (e.g. in case of a timeout). format_device 238 int (*do_analysis) (struct dasd_block *);
235 * returns a ccw chain to be used to format the device. 239
236 */ 240 /*
241 * Last things to do when a device is set online, and first things
242 * when it is set offline.
243 */
244 int (*ready_to_online) (struct dasd_device *);
245 int (*online_to_ready) (struct dasd_device *);
246
247 /*
248 * Device operation functions. build_cp creates a ccw chain for
249 * a block device request, start_io starts the request and
250 * term_IO cancels it (e.g. in case of a timeout). format_device
251 * returns a ccw chain to be used to format the device.
252 * handle_terminated_request allows to examine a cqr and prepare
253 * it for retry.
254 */
237 struct dasd_ccw_req *(*build_cp) (struct dasd_device *, 255 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
256 struct dasd_block *,
238 struct request *); 257 struct request *);
239 int (*start_IO) (struct dasd_ccw_req *); 258 int (*start_IO) (struct dasd_ccw_req *);
240 int (*term_IO) (struct dasd_ccw_req *); 259 int (*term_IO) (struct dasd_ccw_req *);
260 void (*handle_terminated_request) (struct dasd_ccw_req *);
241 struct dasd_ccw_req *(*format_device) (struct dasd_device *, 261 struct dasd_ccw_req *(*format_device) (struct dasd_device *,
242 struct format_data_t *); 262 struct format_data_t *);
243 int (*free_cp) (struct dasd_ccw_req *, struct request *); 263 int (*free_cp) (struct dasd_ccw_req *, struct request *);
244 /* 264
245 * Error recovery functions. examine_error() returns a value that 265 /*
246 * indicates what to do for an error condition. If examine_error() 266 * Error recovery functions. examine_error() returns a value that
267 * indicates what to do for an error condition. If examine_error()
247 * returns 'dasd_era_recover' erp_action() is called to create a 268 * returns 'dasd_era_recover' erp_action() is called to create a
248 * special error recovery ccw. erp_postaction() is called after 269 * special error recovery ccw. erp_postaction() is called after
249 * an error recovery ccw has finished its execution. dump_sense 270 * an error recovery ccw has finished its execution. dump_sense
250 * is called for every error condition to print the sense data 271 * is called for every error condition to print the sense data
251 * to the console. 272 * to the console.
252 */ 273 */
253 dasd_era_t(*examine_error) (struct dasd_ccw_req *, struct irb *);
254 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); 274 dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
255 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); 275 dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
256 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, 276 void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
257 struct irb *); 277 struct irb *);
258 278
279 void (*handle_unsolicited_interrupt) (struct dasd_device *,
280 struct irb *);
281
259 /* i/o control functions. */ 282 /* i/o control functions. */
260 int (*fill_geometry) (struct dasd_device *, struct hd_geometry *); 283 int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
261 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); 284 int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
262 int (*ioctl) (struct dasd_device *, unsigned int, void __user *); 285 int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
263}; 286};
264 287
265extern struct dasd_discipline *dasd_diag_discipline_pointer; 288extern struct dasd_discipline *dasd_diag_discipline_pointer;
@@ -267,12 +290,18 @@ extern struct dasd_discipline *dasd_diag_discipline_pointer;
267/* 290/*
268 * Unique identifier for dasd device. 291 * Unique identifier for dasd device.
269 */ 292 */
293#define UA_NOT_CONFIGURED 0x00
294#define UA_BASE_DEVICE 0x01
295#define UA_BASE_PAV_ALIAS 0x02
296#define UA_HYPER_PAV_ALIAS 0x03
297
270struct dasd_uid { 298struct dasd_uid {
271 __u8 alias; 299 __u8 type;
272 char vendor[4]; 300 char vendor[4];
273 char serial[15]; 301 char serial[15];
274 __u16 ssid; 302 __u16 ssid;
275 __u8 unit_addr; 303 __u8 real_unit_addr;
304 __u8 base_unit_addr;
276}; 305};
277 306
278/* 307/*
@@ -293,14 +322,9 @@ struct dasd_uid {
293 322
294struct dasd_device { 323struct dasd_device {
295 /* Block device stuff. */ 324 /* Block device stuff. */
296 struct gendisk *gdp; 325 struct dasd_block *block;
297 struct request_queue *request_queue; 326
298 spinlock_t request_queue_lock;
299 struct block_device *bdev;
300 unsigned int devindex; 327 unsigned int devindex;
301 unsigned long blocks; /* size of volume in blocks */
302 unsigned int bp_block; /* bytes per block */
303 unsigned int s2b_shift; /* log2 (bp_block/512) */
304 unsigned long flags; /* per device flags */ 328 unsigned long flags; /* per device flags */
305 unsigned short features; /* copy of devmap-features (read-only!) */ 329 unsigned short features; /* copy of devmap-features (read-only!) */
306 330
@@ -316,9 +340,8 @@ struct dasd_device {
316 int state, target; 340 int state, target;
317 int stopped; /* device (ccw_device_start) was stopped */ 341 int stopped; /* device (ccw_device_start) was stopped */
318 342
319 /* Open and reference count. */ 343 /* reference count. */
320 atomic_t ref_count; 344 atomic_t ref_count;
321 atomic_t open_count;
322 345
323 /* ccw queue and memory for static ccw/erp buffers. */ 346 /* ccw queue and memory for static ccw/erp buffers. */
324 struct list_head ccw_queue; 347 struct list_head ccw_queue;
@@ -337,20 +360,45 @@ struct dasd_device {
337 360
338 struct ccw_device *cdev; 361 struct ccw_device *cdev;
339 362
363 /* hook for alias management */
364 struct list_head alias_list;
365};
366
367struct dasd_block {
368 /* Block device stuff. */
369 struct gendisk *gdp;
370 struct request_queue *request_queue;
371 spinlock_t request_queue_lock;
372 struct block_device *bdev;
373 atomic_t open_count;
374
375 unsigned long blocks; /* size of volume in blocks */
376 unsigned int bp_block; /* bytes per block */
377 unsigned int s2b_shift; /* log2 (bp_block/512) */
378
379 struct dasd_device *base;
380 struct list_head ccw_queue;
381 spinlock_t queue_lock;
382
383 atomic_t tasklet_scheduled;
384 struct tasklet_struct tasklet;
385 struct timer_list timer;
386
340#ifdef CONFIG_DASD_PROFILE 387#ifdef CONFIG_DASD_PROFILE
341 struct dasd_profile_info_t profile; 388 struct dasd_profile_info_t profile;
342#endif 389#endif
343}; 390};
344 391
392
393
345/* reasons why device (ccw_device_start) was stopped */ 394/* reasons why device (ccw_device_start) was stopped */
346#define DASD_STOPPED_NOT_ACC 1 /* not accessible */ 395#define DASD_STOPPED_NOT_ACC 1 /* not accessible */
347#define DASD_STOPPED_QUIESCE 2 /* Quiesced */ 396#define DASD_STOPPED_QUIESCE 2 /* Quiesced */
348#define DASD_STOPPED_PENDING 4 /* long busy */ 397#define DASD_STOPPED_PENDING 4 /* long busy */
349#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ 398#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
350#define DASD_STOPPED_DC_EIO 16 /* disconnected, return -EIO */ 399#define DASD_STOPPED_SU 16 /* summary unit check handling */
351 400
352/* per device flags */ 401/* per device flags */
353#define DASD_FLAG_DSC_ERROR 2 /* return -EIO when disconnected */
354#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ 402#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */
355#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ 403#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */
356#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ 404#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */
@@ -489,6 +537,9 @@ dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device)
489struct dasd_device *dasd_alloc_device(void); 537struct dasd_device *dasd_alloc_device(void);
490void dasd_free_device(struct dasd_device *); 538void dasd_free_device(struct dasd_device *);
491 539
540struct dasd_block *dasd_alloc_block(void);
541void dasd_free_block(struct dasd_block *);
542
492void dasd_enable_device(struct dasd_device *); 543void dasd_enable_device(struct dasd_device *);
493void dasd_set_target_state(struct dasd_device *, int); 544void dasd_set_target_state(struct dasd_device *, int);
494void dasd_kick_device(struct dasd_device *); 545void dasd_kick_device(struct dasd_device *);
@@ -497,18 +548,23 @@ void dasd_add_request_head(struct dasd_ccw_req *);
497void dasd_add_request_tail(struct dasd_ccw_req *); 548void dasd_add_request_tail(struct dasd_ccw_req *);
498int dasd_start_IO(struct dasd_ccw_req *); 549int dasd_start_IO(struct dasd_ccw_req *);
499int dasd_term_IO(struct dasd_ccw_req *); 550int dasd_term_IO(struct dasd_ccw_req *);
500void dasd_schedule_bh(struct dasd_device *); 551void dasd_schedule_device_bh(struct dasd_device *);
552void dasd_schedule_block_bh(struct dasd_block *);
501int dasd_sleep_on(struct dasd_ccw_req *); 553int dasd_sleep_on(struct dasd_ccw_req *);
502int dasd_sleep_on_immediatly(struct dasd_ccw_req *); 554int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
503int dasd_sleep_on_interruptible(struct dasd_ccw_req *); 555int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
504void dasd_set_timer(struct dasd_device *, int); 556void dasd_device_set_timer(struct dasd_device *, int);
505void dasd_clear_timer(struct dasd_device *); 557void dasd_device_clear_timer(struct dasd_device *);
558void dasd_block_set_timer(struct dasd_block *, int);
559void dasd_block_clear_timer(struct dasd_block *);
506int dasd_cancel_req(struct dasd_ccw_req *); 560int dasd_cancel_req(struct dasd_ccw_req *);
561int dasd_flush_device_queue(struct dasd_device *);
507int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); 562int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *);
508void dasd_generic_remove (struct ccw_device *cdev); 563void dasd_generic_remove (struct ccw_device *cdev);
509int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); 564int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
510int dasd_generic_set_offline (struct ccw_device *cdev); 565int dasd_generic_set_offline (struct ccw_device *cdev);
511int dasd_generic_notify(struct ccw_device *, int); 566int dasd_generic_notify(struct ccw_device *, int);
567void dasd_generic_handle_state_change(struct dasd_device *);
512 568
513int dasd_generic_read_dev_chars(struct dasd_device *, char *, void **, int); 569int dasd_generic_read_dev_chars(struct dasd_device *, char *, void **, int);
514 570
@@ -542,10 +598,10 @@ int dasd_busid_known(char *);
542/* externals in dasd_gendisk.c */ 598/* externals in dasd_gendisk.c */
543int dasd_gendisk_init(void); 599int dasd_gendisk_init(void);
544void dasd_gendisk_exit(void); 600void dasd_gendisk_exit(void);
545int dasd_gendisk_alloc(struct dasd_device *); 601int dasd_gendisk_alloc(struct dasd_block *);
546void dasd_gendisk_free(struct dasd_device *); 602void dasd_gendisk_free(struct dasd_block *);
547int dasd_scan_partitions(struct dasd_device *); 603int dasd_scan_partitions(struct dasd_block *);
548void dasd_destroy_partitions(struct dasd_device *); 604void dasd_destroy_partitions(struct dasd_block *);
549 605
550/* externals in dasd_ioctl.c */ 606/* externals in dasd_ioctl.c */
551int dasd_ioctl(struct inode *, struct file *, unsigned int, unsigned long); 607int dasd_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
@@ -563,20 +619,9 @@ struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
563void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); 619void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
564void dasd_log_sense(struct dasd_ccw_req *, struct irb *); 620void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
565 621
566/* externals in dasd_3370_erp.c */
567dasd_era_t dasd_3370_erp_examine(struct dasd_ccw_req *, struct irb *);
568
569/* externals in dasd_3990_erp.c */ 622/* externals in dasd_3990_erp.c */
570dasd_era_t dasd_3990_erp_examine(struct dasd_ccw_req *, struct irb *);
571struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); 623struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
572 624
573/* externals in dasd_9336_erp.c */
574dasd_era_t dasd_9336_erp_examine(struct dasd_ccw_req *, struct irb *);
575
576/* externals in dasd_9336_erp.c */
577dasd_era_t dasd_9343_erp_examine(struct dasd_ccw_req *, struct irb *);
578struct dasd_ccw_req *dasd_9343_erp_action(struct dasd_ccw_req *);
579
580/* externals in dasd_eer.c */ 625/* externals in dasd_eer.c */
581#ifdef CONFIG_DASD_EER 626#ifdef CONFIG_DASD_EER
582int dasd_eer_init(void); 627int dasd_eer_init(void);
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index 672eb0a3dd0b..91a64630cb0f 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -38,15 +38,15 @@ dasd_ioctl_api_version(void __user *argp)
38static int 38static int
39dasd_ioctl_enable(struct block_device *bdev) 39dasd_ioctl_enable(struct block_device *bdev)
40{ 40{
41 struct dasd_device *device = bdev->bd_disk->private_data; 41 struct dasd_block *block = bdev->bd_disk->private_data;
42 42
43 if (!capable(CAP_SYS_ADMIN)) 43 if (!capable(CAP_SYS_ADMIN))
44 return -EACCES; 44 return -EACCES;
45 45
46 dasd_enable_device(device); 46 dasd_enable_device(block->base);
47 /* Formatting the dasd device can change the capacity. */ 47 /* Formatting the dasd device can change the capacity. */
48 mutex_lock(&bdev->bd_mutex); 48 mutex_lock(&bdev->bd_mutex);
49 i_size_write(bdev->bd_inode, (loff_t)get_capacity(device->gdp) << 9); 49 i_size_write(bdev->bd_inode, (loff_t)get_capacity(block->gdp) << 9);
50 mutex_unlock(&bdev->bd_mutex); 50 mutex_unlock(&bdev->bd_mutex);
51 return 0; 51 return 0;
52} 52}
@@ -58,7 +58,7 @@ dasd_ioctl_enable(struct block_device *bdev)
58static int 58static int
59dasd_ioctl_disable(struct block_device *bdev) 59dasd_ioctl_disable(struct block_device *bdev)
60{ 60{
61 struct dasd_device *device = bdev->bd_disk->private_data; 61 struct dasd_block *block = bdev->bd_disk->private_data;
62 62
63 if (!capable(CAP_SYS_ADMIN)) 63 if (!capable(CAP_SYS_ADMIN))
64 return -EACCES; 64 return -EACCES;
@@ -71,7 +71,7 @@ dasd_ioctl_disable(struct block_device *bdev)
71 * using the BIODASDFMT ioctl. Therefore the correct state for the 71 * using the BIODASDFMT ioctl. Therefore the correct state for the
72 * device is DASD_STATE_BASIC that allows to do basic i/o. 72 * device is DASD_STATE_BASIC that allows to do basic i/o.
73 */ 73 */
74 dasd_set_target_state(device, DASD_STATE_BASIC); 74 dasd_set_target_state(block->base, DASD_STATE_BASIC);
75 /* 75 /*
76 * Set i_size to zero, since read, write, etc. check against this 76 * Set i_size to zero, since read, write, etc. check against this
77 * value. 77 * value.
@@ -85,19 +85,19 @@ dasd_ioctl_disable(struct block_device *bdev)
85/* 85/*
86 * Quiesce device. 86 * Quiesce device.
87 */ 87 */
88static int 88static int dasd_ioctl_quiesce(struct dasd_block *block)
89dasd_ioctl_quiesce(struct dasd_device *device)
90{ 89{
91 unsigned long flags; 90 unsigned long flags;
91 struct dasd_device *base;
92 92
93 base = block->base;
93 if (!capable (CAP_SYS_ADMIN)) 94 if (!capable (CAP_SYS_ADMIN))
94 return -EACCES; 95 return -EACCES;
95 96
96 DEV_MESSAGE (KERN_DEBUG, device, "%s", 97 DEV_MESSAGE(KERN_DEBUG, base, "%s", "Quiesce IO on device");
97 "Quiesce IO on device"); 98 spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags);
98 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 99 base->stopped |= DASD_STOPPED_QUIESCE;
99 device->stopped |= DASD_STOPPED_QUIESCE; 100 spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags);
100 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
101 return 0; 101 return 0;
102} 102}
103 103
@@ -105,22 +105,21 @@ dasd_ioctl_quiesce(struct dasd_device *device)
105/* 105/*
106 * Quiesce device. 106 * Quiesce device.
107 */ 107 */
108static int 108static int dasd_ioctl_resume(struct dasd_block *block)
109dasd_ioctl_resume(struct dasd_device *device)
110{ 109{
111 unsigned long flags; 110 unsigned long flags;
111 struct dasd_device *base;
112 112
113 base = block->base;
113 if (!capable (CAP_SYS_ADMIN)) 114 if (!capable (CAP_SYS_ADMIN))
114 return -EACCES; 115 return -EACCES;
115 116
116 DEV_MESSAGE (KERN_DEBUG, device, "%s", 117 DEV_MESSAGE(KERN_DEBUG, base, "%s", "resume IO on device");
117 "resume IO on device"); 118 spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags);
118 119 base->stopped &= ~DASD_STOPPED_QUIESCE;
119 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 120 spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags);
120 device->stopped &= ~DASD_STOPPED_QUIESCE;
121 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
122 121
123 dasd_schedule_bh (device); 122 dasd_schedule_block_bh(block);
124 return 0; 123 return 0;
125} 124}
126 125
@@ -130,22 +129,23 @@ dasd_ioctl_resume(struct dasd_device *device)
130 * commands to format a single unit of the device. In terms of the ECKD 129 * commands to format a single unit of the device. In terms of the ECKD
131 * devices this means CCWs are generated to format a single track. 130 * devices this means CCWs are generated to format a single track.
132 */ 131 */
133static int 132static int dasd_format(struct dasd_block *block, struct format_data_t *fdata)
134dasd_format(struct dasd_device * device, struct format_data_t * fdata)
135{ 133{
136 struct dasd_ccw_req *cqr; 134 struct dasd_ccw_req *cqr;
135 struct dasd_device *base;
137 int rc; 136 int rc;
138 137
139 if (device->discipline->format_device == NULL) 138 base = block->base;
139 if (base->discipline->format_device == NULL)
140 return -EPERM; 140 return -EPERM;
141 141
142 if (device->state != DASD_STATE_BASIC) { 142 if (base->state != DASD_STATE_BASIC) {
143 DEV_MESSAGE(KERN_WARNING, device, "%s", 143 DEV_MESSAGE(KERN_WARNING, base, "%s",
144 "dasd_format: device is not disabled! "); 144 "dasd_format: device is not disabled! ");
145 return -EBUSY; 145 return -EBUSY;
146 } 146 }
147 147
148 DBF_DEV_EVENT(DBF_NOTICE, device, 148 DBF_DEV_EVENT(DBF_NOTICE, base,
149 "formatting units %d to %d (%d B blocks) flags %d", 149 "formatting units %d to %d (%d B blocks) flags %d",
150 fdata->start_unit, 150 fdata->start_unit,
151 fdata->stop_unit, fdata->blksize, fdata->intensity); 151 fdata->stop_unit, fdata->blksize, fdata->intensity);
@@ -156,20 +156,20 @@ dasd_format(struct dasd_device * device, struct format_data_t * fdata)
156 * enabling the device later. 156 * enabling the device later.
157 */ 157 */
158 if (fdata->start_unit == 0) { 158 if (fdata->start_unit == 0) {
159 struct block_device *bdev = bdget_disk(device->gdp, 0); 159 struct block_device *bdev = bdget_disk(block->gdp, 0);
160 bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); 160 bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize);
161 bdput(bdev); 161 bdput(bdev);
162 } 162 }
163 163
164 while (fdata->start_unit <= fdata->stop_unit) { 164 while (fdata->start_unit <= fdata->stop_unit) {
165 cqr = device->discipline->format_device(device, fdata); 165 cqr = base->discipline->format_device(base, fdata);
166 if (IS_ERR(cqr)) 166 if (IS_ERR(cqr))
167 return PTR_ERR(cqr); 167 return PTR_ERR(cqr);
168 rc = dasd_sleep_on_interruptible(cqr); 168 rc = dasd_sleep_on_interruptible(cqr);
169 dasd_sfree_request(cqr, cqr->device); 169 dasd_sfree_request(cqr, cqr->memdev);
170 if (rc) { 170 if (rc) {
171 if (rc != -ERESTARTSYS) 171 if (rc != -ERESTARTSYS)
172 DEV_MESSAGE(KERN_ERR, device, 172 DEV_MESSAGE(KERN_ERR, base,
173 " Formatting of unit %d failed " 173 " Formatting of unit %d failed "
174 "with rc = %d", 174 "with rc = %d",
175 fdata->start_unit, rc); 175 fdata->start_unit, rc);
@@ -186,7 +186,7 @@ dasd_format(struct dasd_device * device, struct format_data_t * fdata)
186static int 186static int
187dasd_ioctl_format(struct block_device *bdev, void __user *argp) 187dasd_ioctl_format(struct block_device *bdev, void __user *argp)
188{ 188{
189 struct dasd_device *device = bdev->bd_disk->private_data; 189 struct dasd_block *block = bdev->bd_disk->private_data;
190 struct format_data_t fdata; 190 struct format_data_t fdata;
191 191
192 if (!capable(CAP_SYS_ADMIN)) 192 if (!capable(CAP_SYS_ADMIN))
@@ -194,51 +194,47 @@ dasd_ioctl_format(struct block_device *bdev, void __user *argp)
194 if (!argp) 194 if (!argp)
195 return -EINVAL; 195 return -EINVAL;
196 196
197 if (device->features & DASD_FEATURE_READONLY) 197 if (block->base->features & DASD_FEATURE_READONLY)
198 return -EROFS; 198 return -EROFS;
199 if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) 199 if (copy_from_user(&fdata, argp, sizeof(struct format_data_t)))
200 return -EFAULT; 200 return -EFAULT;
201 if (bdev != bdev->bd_contains) { 201 if (bdev != bdev->bd_contains) {
202 DEV_MESSAGE(KERN_WARNING, device, "%s", 202 DEV_MESSAGE(KERN_WARNING, block->base, "%s",
203 "Cannot low-level format a partition"); 203 "Cannot low-level format a partition");
204 return -EINVAL; 204 return -EINVAL;
205 } 205 }
206 return dasd_format(device, &fdata); 206 return dasd_format(block, &fdata);
207} 207}
208 208
209#ifdef CONFIG_DASD_PROFILE 209#ifdef CONFIG_DASD_PROFILE
210/* 210/*
211 * Reset device profile information 211 * Reset device profile information
212 */ 212 */
213static int 213static int dasd_ioctl_reset_profile(struct dasd_block *block)
214dasd_ioctl_reset_profile(struct dasd_device *device)
215{ 214{
216 memset(&device->profile, 0, sizeof (struct dasd_profile_info_t)); 215 memset(&block->profile, 0, sizeof(struct dasd_profile_info_t));
217 return 0; 216 return 0;
218} 217}
219 218
220/* 219/*
221 * Return device profile information 220 * Return device profile information
222 */ 221 */
223static int 222static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp)
224dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp)
225{ 223{
226 if (dasd_profile_level == DASD_PROFILE_OFF) 224 if (dasd_profile_level == DASD_PROFILE_OFF)
227 return -EIO; 225 return -EIO;
228 if (copy_to_user(argp, &device->profile, 226 if (copy_to_user(argp, &block->profile,
229 sizeof (struct dasd_profile_info_t))) 227 sizeof(struct dasd_profile_info_t)))
230 return -EFAULT; 228 return -EFAULT;
231 return 0; 229 return 0;
232} 230}
233#else 231#else
234static int 232static int dasd_ioctl_reset_profile(struct dasd_block *block)
235dasd_ioctl_reset_profile(struct dasd_device *device)
236{ 233{
237 return -ENOSYS; 234 return -ENOSYS;
238} 235}
239 236
240static int 237static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp)
241dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp)
242{ 238{
243 return -ENOSYS; 239 return -ENOSYS;
244} 240}
@@ -247,87 +243,88 @@ dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp)
247/* 243/*
248 * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. 244 * Return dasd information. Used for BIODASDINFO and BIODASDINFO2.
249 */ 245 */
250static int 246static int dasd_ioctl_information(struct dasd_block *block,
251dasd_ioctl_information(struct dasd_device *device, 247 unsigned int cmd, void __user *argp)
252 unsigned int cmd, void __user *argp)
253{ 248{
254 struct dasd_information2_t *dasd_info; 249 struct dasd_information2_t *dasd_info;
255 unsigned long flags; 250 unsigned long flags;
256 int rc; 251 int rc;
252 struct dasd_device *base;
257 struct ccw_device *cdev; 253 struct ccw_device *cdev;
258 struct ccw_dev_id dev_id; 254 struct ccw_dev_id dev_id;
259 255
260 if (!device->discipline->fill_info) 256 base = block->base;
257 if (!base->discipline->fill_info)
261 return -EINVAL; 258 return -EINVAL;
262 259
263 dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); 260 dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL);
264 if (dasd_info == NULL) 261 if (dasd_info == NULL)
265 return -ENOMEM; 262 return -ENOMEM;
266 263
267 rc = device->discipline->fill_info(device, dasd_info); 264 rc = base->discipline->fill_info(base, dasd_info);
268 if (rc) { 265 if (rc) {
269 kfree(dasd_info); 266 kfree(dasd_info);
270 return rc; 267 return rc;
271 } 268 }
272 269
273 cdev = device->cdev; 270 cdev = base->cdev;
274 ccw_device_get_id(cdev, &dev_id); 271 ccw_device_get_id(cdev, &dev_id);
275 272
276 dasd_info->devno = dev_id.devno; 273 dasd_info->devno = dev_id.devno;
277 dasd_info->schid = _ccw_device_get_subchannel_number(device->cdev); 274 dasd_info->schid = _ccw_device_get_subchannel_number(base->cdev);
278 dasd_info->cu_type = cdev->id.cu_type; 275 dasd_info->cu_type = cdev->id.cu_type;
279 dasd_info->cu_model = cdev->id.cu_model; 276 dasd_info->cu_model = cdev->id.cu_model;
280 dasd_info->dev_type = cdev->id.dev_type; 277 dasd_info->dev_type = cdev->id.dev_type;
281 dasd_info->dev_model = cdev->id.dev_model; 278 dasd_info->dev_model = cdev->id.dev_model;
282 dasd_info->status = device->state; 279 dasd_info->status = base->state;
283 /* 280 /*
284 * The open_count is increased for every opener, that includes 281 * The open_count is increased for every opener, that includes
285 * the blkdev_get in dasd_scan_partitions. 282 * the blkdev_get in dasd_scan_partitions.
286 * This must be hidden from user-space. 283 * This must be hidden from user-space.
287 */ 284 */
288 dasd_info->open_count = atomic_read(&device->open_count); 285 dasd_info->open_count = atomic_read(&block->open_count);
289 if (!device->bdev) 286 if (!block->bdev)
290 dasd_info->open_count++; 287 dasd_info->open_count++;
291 288
292 /* 289 /*
293 * check if device is really formatted 290 * check if device is really formatted
294 * LDL / CDL was returned by 'fill_info' 291 * LDL / CDL was returned by 'fill_info'
295 */ 292 */
296 if ((device->state < DASD_STATE_READY) || 293 if ((base->state < DASD_STATE_READY) ||
297 (dasd_check_blocksize(device->bp_block))) 294 (dasd_check_blocksize(block->bp_block)))
298 dasd_info->format = DASD_FORMAT_NONE; 295 dasd_info->format = DASD_FORMAT_NONE;
299 296
300 dasd_info->features |= 297 dasd_info->features |=
301 ((device->features & DASD_FEATURE_READONLY) != 0); 298 ((base->features & DASD_FEATURE_READONLY) != 0);
302 299
303 if (device->discipline) 300 if (base->discipline)
304 memcpy(dasd_info->type, device->discipline->name, 4); 301 memcpy(dasd_info->type, base->discipline->name, 4);
305 else 302 else
306 memcpy(dasd_info->type, "none", 4); 303 memcpy(dasd_info->type, "none", 4);
307 304
308 if (device->request_queue->request_fn) { 305 if (block->request_queue->request_fn) {
309 struct list_head *l; 306 struct list_head *l;
310#ifdef DASD_EXTENDED_PROFILING 307#ifdef DASD_EXTENDED_PROFILING
311 { 308 {
312 struct list_head *l; 309 struct list_head *l;
313 spin_lock_irqsave(&device->lock, flags); 310 spin_lock_irqsave(&block->lock, flags);
314 list_for_each(l, &device->request_queue->queue_head) 311 list_for_each(l, &block->request_queue->queue_head)
315 dasd_info->req_queue_len++; 312 dasd_info->req_queue_len++;
316 spin_unlock_irqrestore(&device->lock, flags); 313 spin_unlock_irqrestore(&block->lock, flags);
317 } 314 }
318#endif /* DASD_EXTENDED_PROFILING */ 315#endif /* DASD_EXTENDED_PROFILING */
319 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 316 spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags);
320 list_for_each(l, &device->ccw_queue) 317 list_for_each(l, &base->ccw_queue)
321 dasd_info->chanq_len++; 318 dasd_info->chanq_len++;
322 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), 319 spin_unlock_irqrestore(get_ccwdev_lock(base->cdev),
323 flags); 320 flags);
324 } 321 }
325 322
326 rc = 0; 323 rc = 0;
327 if (copy_to_user(argp, dasd_info, 324 if (copy_to_user(argp, dasd_info,
328 ((cmd == (unsigned int) BIODASDINFO2) ? 325 ((cmd == (unsigned int) BIODASDINFO2) ?
329 sizeof (struct dasd_information2_t) : 326 sizeof(struct dasd_information2_t) :
330 sizeof (struct dasd_information_t)))) 327 sizeof(struct dasd_information_t))))
331 rc = -EFAULT; 328 rc = -EFAULT;
332 kfree(dasd_info); 329 kfree(dasd_info);
333 return rc; 330 return rc;
@@ -339,7 +336,7 @@ dasd_ioctl_information(struct dasd_device *device,
339static int 336static int
340dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) 337dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp)
341{ 338{
342 struct dasd_device *device = bdev->bd_disk->private_data; 339 struct dasd_block *block = bdev->bd_disk->private_data;
343 int intval; 340 int intval;
344 341
345 if (!capable(CAP_SYS_ADMIN)) 342 if (!capable(CAP_SYS_ADMIN))
@@ -351,11 +348,10 @@ dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp)
351 return -EFAULT; 348 return -EFAULT;
352 349
353 set_disk_ro(bdev->bd_disk, intval); 350 set_disk_ro(bdev->bd_disk, intval);
354 return dasd_set_feature(device->cdev, DASD_FEATURE_READONLY, intval); 351 return dasd_set_feature(block->base->cdev, DASD_FEATURE_READONLY, intval);
355} 352}
356 353
357static int 354static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd,
358dasd_ioctl_readall_cmb(struct dasd_device *device, unsigned int cmd,
359 unsigned long arg) 355 unsigned long arg)
360{ 356{
361 struct cmbdata __user *argp = (void __user *) arg; 357 struct cmbdata __user *argp = (void __user *) arg;
@@ -363,7 +359,7 @@ dasd_ioctl_readall_cmb(struct dasd_device *device, unsigned int cmd,
363 struct cmbdata data; 359 struct cmbdata data;
364 int ret; 360 int ret;
365 361
366 ret = cmf_readall(device->cdev, &data); 362 ret = cmf_readall(block->base->cdev, &data);
367 if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp)))) 363 if (!ret && copy_to_user(argp, &data, min(size, sizeof(*argp))))
368 return -EFAULT; 364 return -EFAULT;
369 return ret; 365 return ret;
@@ -374,10 +370,10 @@ dasd_ioctl(struct inode *inode, struct file *file,
374 unsigned int cmd, unsigned long arg) 370 unsigned int cmd, unsigned long arg)
375{ 371{
376 struct block_device *bdev = inode->i_bdev; 372 struct block_device *bdev = inode->i_bdev;
377 struct dasd_device *device = bdev->bd_disk->private_data; 373 struct dasd_block *block = bdev->bd_disk->private_data;
378 void __user *argp = (void __user *)arg; 374 void __user *argp = (void __user *)arg;
379 375
380 if (!device) 376 if (!block)
381 return -ENODEV; 377 return -ENODEV;
382 378
383 if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { 379 if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) {
@@ -391,33 +387,33 @@ dasd_ioctl(struct inode *inode, struct file *file,
391 case BIODASDENABLE: 387 case BIODASDENABLE:
392 return dasd_ioctl_enable(bdev); 388 return dasd_ioctl_enable(bdev);
393 case BIODASDQUIESCE: 389 case BIODASDQUIESCE:
394 return dasd_ioctl_quiesce(device); 390 return dasd_ioctl_quiesce(block);
395 case BIODASDRESUME: 391 case BIODASDRESUME:
396 return dasd_ioctl_resume(device); 392 return dasd_ioctl_resume(block);
397 case BIODASDFMT: 393 case BIODASDFMT:
398 return dasd_ioctl_format(bdev, argp); 394 return dasd_ioctl_format(bdev, argp);
399 case BIODASDINFO: 395 case BIODASDINFO:
400 return dasd_ioctl_information(device, cmd, argp); 396 return dasd_ioctl_information(block, cmd, argp);
401 case BIODASDINFO2: 397 case BIODASDINFO2:
402 return dasd_ioctl_information(device, cmd, argp); 398 return dasd_ioctl_information(block, cmd, argp);
403 case BIODASDPRRD: 399 case BIODASDPRRD:
404 return dasd_ioctl_read_profile(device, argp); 400 return dasd_ioctl_read_profile(block, argp);
405 case BIODASDPRRST: 401 case BIODASDPRRST:
406 return dasd_ioctl_reset_profile(device); 402 return dasd_ioctl_reset_profile(block);
407 case BLKROSET: 403 case BLKROSET:
408 return dasd_ioctl_set_ro(bdev, argp); 404 return dasd_ioctl_set_ro(bdev, argp);
409 case DASDAPIVER: 405 case DASDAPIVER:
410 return dasd_ioctl_api_version(argp); 406 return dasd_ioctl_api_version(argp);
411 case BIODASDCMFENABLE: 407 case BIODASDCMFENABLE:
412 return enable_cmf(device->cdev); 408 return enable_cmf(block->base->cdev);
413 case BIODASDCMFDISABLE: 409 case BIODASDCMFDISABLE:
414 return disable_cmf(device->cdev); 410 return disable_cmf(block->base->cdev);
415 case BIODASDREADALLCMB: 411 case BIODASDREADALLCMB:
416 return dasd_ioctl_readall_cmb(device, cmd, arg); 412 return dasd_ioctl_readall_cmb(block, cmd, arg);
417 default: 413 default:
418 /* if the discipline has an ioctl method try it. */ 414 /* if the discipline has an ioctl method try it. */
419 if (device->discipline->ioctl) { 415 if (block->base->discipline->ioctl) {
420 int rval = device->discipline->ioctl(device, cmd, argp); 416 int rval = block->base->discipline->ioctl(block, cmd, argp);
421 if (rval != -ENOIOCTLCMD) 417 if (rval != -ENOIOCTLCMD)
422 return rval; 418 return rval;
423 } 419 }
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index ac7e8ef504cb..0584a7dc5ede 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -54,11 +54,16 @@ static int
54dasd_devices_show(struct seq_file *m, void *v) 54dasd_devices_show(struct seq_file *m, void *v)
55{ 55{
56 struct dasd_device *device; 56 struct dasd_device *device;
57 struct dasd_block *block;
57 char *substr; 58 char *substr;
58 59
59 device = dasd_device_from_devindex((unsigned long) v - 1); 60 device = dasd_device_from_devindex((unsigned long) v - 1);
60 if (IS_ERR(device)) 61 if (IS_ERR(device))
61 return 0; 62 return 0;
63 if (device->block)
64 block = device->block;
65 else
66 return 0;
62 /* Print device number. */ 67 /* Print device number. */
63 seq_printf(m, "%s", device->cdev->dev.bus_id); 68 seq_printf(m, "%s", device->cdev->dev.bus_id);
64 /* Print discipline string. */ 69 /* Print discipline string. */
@@ -67,14 +72,14 @@ dasd_devices_show(struct seq_file *m, void *v)
67 else 72 else
68 seq_printf(m, "(none)"); 73 seq_printf(m, "(none)");
69 /* Print kdev. */ 74 /* Print kdev. */
70 if (device->gdp) 75 if (block->gdp)
71 seq_printf(m, " at (%3d:%6d)", 76 seq_printf(m, " at (%3d:%6d)",
72 device->gdp->major, device->gdp->first_minor); 77 block->gdp->major, block->gdp->first_minor);
73 else 78 else
74 seq_printf(m, " at (???:??????)"); 79 seq_printf(m, " at (???:??????)");
75 /* Print device name. */ 80 /* Print device name. */
76 if (device->gdp) 81 if (block->gdp)
77 seq_printf(m, " is %-8s", device->gdp->disk_name); 82 seq_printf(m, " is %-8s", block->gdp->disk_name);
78 else 83 else
79 seq_printf(m, " is ????????"); 84 seq_printf(m, " is ????????");
80 /* Print devices features. */ 85 /* Print devices features. */
@@ -100,14 +105,14 @@ dasd_devices_show(struct seq_file *m, void *v)
100 case DASD_STATE_READY: 105 case DASD_STATE_READY:
101 case DASD_STATE_ONLINE: 106 case DASD_STATE_ONLINE:
102 seq_printf(m, "active "); 107 seq_printf(m, "active ");
103 if (dasd_check_blocksize(device->bp_block)) 108 if (dasd_check_blocksize(block->bp_block))
104 seq_printf(m, "n/f "); 109 seq_printf(m, "n/f ");
105 else 110 else
106 seq_printf(m, 111 seq_printf(m,
107 "at blocksize: %d, %ld blocks, %ld MB", 112 "at blocksize: %d, %ld blocks, %ld MB",
108 device->bp_block, device->blocks, 113 block->bp_block, block->blocks,
109 ((device->bp_block >> 9) * 114 ((block->bp_block >> 9) *
110 device->blocks) >> 11); 115 block->blocks) >> 11);
111 break; 116 break;
112 default: 117 default:
113 seq_printf(m, "no stat"); 118 seq_printf(m, "no stat");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 10:33:35 -0500