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Diffstat (limited to 'drivers/s390/scsi/zfcp_scsi.c')
-rw-r--r--drivers/s390/scsi/zfcp_scsi.c784
1 files changed, 201 insertions, 583 deletions
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 01687559dc06..aeae56b00b45 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -1,220 +1,65 @@
1/* 1/*
2 * This file is part of the zfcp device driver for 2 * zfcp device driver
3 * FCP adapters for IBM System z9 and zSeries.
4 * 3 *
5 * (C) Copyright IBM Corp. 2002, 2006 4 * Interface to Linux SCSI midlayer.
6 * 5 *
7 * This program is free software; you can redistribute it and/or modify 6 * Copyright IBM Corporation 2002, 2008
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */ 7 */
21 8
22#define ZFCP_LOG_AREA ZFCP_LOG_AREA_SCSI
23
24#include "zfcp_ext.h" 9#include "zfcp_ext.h"
25#include <asm/atomic.h> 10#include <asm/atomic.h>
26 11
27static void zfcp_scsi_slave_destroy(struct scsi_device *sdp);
28static int zfcp_scsi_slave_alloc(struct scsi_device *sdp);
29static int zfcp_scsi_slave_configure(struct scsi_device *sdp);
30static int zfcp_scsi_queuecommand(struct scsi_cmnd *,
31 void (*done) (struct scsi_cmnd *));
32static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *);
33static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *);
34static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *);
35static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *);
36static int zfcp_task_management_function(struct zfcp_unit *, u8,
37 struct scsi_cmnd *);
38
39static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int,
40 unsigned int, unsigned int);
41
42static struct device_attribute *zfcp_sysfs_sdev_attrs[];
43static struct device_attribute *zfcp_a_stats_attrs[];
44
45struct zfcp_data zfcp_data = {
46 .scsi_host_template = {
47 .name = ZFCP_NAME,
48 .module = THIS_MODULE,
49 .proc_name = "zfcp",
50 .slave_alloc = zfcp_scsi_slave_alloc,
51 .slave_configure = zfcp_scsi_slave_configure,
52 .slave_destroy = zfcp_scsi_slave_destroy,
53 .queuecommand = zfcp_scsi_queuecommand,
54 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
55 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
56 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
57 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
58 .can_queue = 4096,
59 .this_id = -1,
60 .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ,
61 .cmd_per_lun = 1,
62 .use_clustering = 1,
63 .sdev_attrs = zfcp_sysfs_sdev_attrs,
64 .max_sectors = ZFCP_MAX_SECTORS,
65 .shost_attrs = zfcp_a_stats_attrs,
66 },
67 .driver_version = ZFCP_VERSION,
68};
69
70/* Find start of Response Information in FCP response unit*/
71char *
72zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
73{
74 char *fcp_rsp_info_ptr;
75
76 fcp_rsp_info_ptr =
77 (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu));
78
79 return fcp_rsp_info_ptr;
80}
81
82/* Find start of Sense Information in FCP response unit*/ 12/* Find start of Sense Information in FCP response unit*/
83char * 13char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
84zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
85{ 14{
86 char *fcp_sns_info_ptr; 15 char *fcp_sns_info_ptr;
87 16
88 fcp_sns_info_ptr = 17 fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1];
89 (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu));
90 if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid) 18 if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)
91 fcp_sns_info_ptr = (char *) fcp_sns_info_ptr + 19 fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len;
92 fcp_rsp_iu->fcp_rsp_len;
93 20
94 return fcp_sns_info_ptr; 21 return fcp_sns_info_ptr;
95} 22}
96 23
97static fcp_dl_t * 24void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl)
98zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd)
99{ 25{
100 int additional_length = fcp_cmd->add_fcp_cdb_length << 2; 26 fcp_dl_t *fcp_dl_ptr;
101 fcp_dl_t *fcp_dl_addr;
102 27
103 fcp_dl_addr = (fcp_dl_t *)
104 ((unsigned char *) fcp_cmd +
105 sizeof (struct fcp_cmnd_iu) + additional_length);
106 /* 28 /*
107 * fcp_dl_addr = start address of fcp_cmnd structure + 29 * fcp_dl_addr = start address of fcp_cmnd structure +
108 * size of fixed part + size of dynamically sized add_dcp_cdb field 30 * size of fixed part + size of dynamically sized add_dcp_cdb field
109 * SEE FCP-2 documentation 31 * SEE FCP-2 documentation
110 */ 32 */
111 return fcp_dl_addr; 33 fcp_dl_ptr = (fcp_dl_t *) ((unsigned char *) &fcp_cmd[1] +
34 (fcp_cmd->add_fcp_cdb_length << 2));
35 *fcp_dl_ptr = fcp_dl;
112} 36}
113 37
114fcp_dl_t
115zfcp_get_fcp_dl(struct fcp_cmnd_iu * fcp_cmd)
116{
117 return *zfcp_get_fcp_dl_ptr(fcp_cmd);
118}
119
120void
121zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl)
122{
123 *zfcp_get_fcp_dl_ptr(fcp_cmd) = fcp_dl;
124}
125
126/*
127 * note: it's a bit-or operation not an assignment
128 * regarding the specified byte
129 */
130static inline void
131set_byte(int *result, char status, char pos)
132{
133 *result |= status << (pos * 8);
134}
135
136void
137set_host_byte(int *result, char status)
138{
139 set_byte(result, status, 2);
140}
141
142void
143set_driver_byte(int *result, char status)
144{
145 set_byte(result, status, 3);
146}
147
148static int
149zfcp_scsi_slave_alloc(struct scsi_device *sdp)
150{
151 struct zfcp_adapter *adapter;
152 struct zfcp_unit *unit;
153 unsigned long flags;
154 int retval = -ENXIO;
155
156 adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
157 if (!adapter)
158 goto out;
159
160 read_lock_irqsave(&zfcp_data.config_lock, flags);
161 unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
162 if (unit && atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED,
163 &unit->status)) {
164 sdp->hostdata = unit;
165 unit->device = sdp;
166 zfcp_unit_get(unit);
167 retval = 0;
168 }
169 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
170 out:
171 return retval;
172}
173
174/**
175 * zfcp_scsi_slave_destroy - called when scsi device is removed
176 *
177 * Remove reference to associated scsi device for an zfcp_unit.
178 * Mark zfcp_unit as failed. The scsi device might be deleted via sysfs
179 * or a scan for this device might have failed.
180 */
181static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt) 38static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
182{ 39{
183 struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata; 40 struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
184 41 WARN_ON(!unit);
185 if (unit) { 42 if (unit) {
186 atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status); 43 atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status);
187 sdpnt->hostdata = NULL; 44 sdpnt->hostdata = NULL;
188 unit->device = NULL; 45 unit->device = NULL;
189 zfcp_erp_unit_failed(unit, 12, NULL); 46 zfcp_erp_unit_failed(unit, 12, NULL);
190 zfcp_unit_put(unit); 47 zfcp_unit_put(unit);
191 } else 48 }
192 ZFCP_LOG_NORMAL("bug: no unit associated with SCSI device at "
193 "address %p\n", sdpnt);
194} 49}
195 50
196/* 51static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
197 * called from scsi midlayer to allow finetuning of a device.
198 */
199static int
200zfcp_scsi_slave_configure(struct scsi_device *sdp)
201{ 52{
202 if (sdp->tagged_supported) 53 if (sdp->tagged_supported)
203 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, ZFCP_CMND_PER_LUN); 54 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, 32);
204 else 55 else
205 scsi_adjust_queue_depth(sdp, 0, 1); 56 scsi_adjust_queue_depth(sdp, 0, 1);
206 return 0; 57 return 0;
207} 58}
208 59
209/** 60static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
210 * zfcp_scsi_command_fail - set result in scsi_cmnd and call scsi_done function
211 * @scpnt: pointer to struct scsi_cmnd where result is set
212 * @result: result to be set in scpnt (e.g. DID_ERROR)
213 */
214static void
215zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
216{ 61{
217 set_host_byte(&scpnt->result, result); 62 set_host_byte(scpnt, result);
218 if ((scpnt->device != NULL) && (scpnt->device->host != NULL)) 63 if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
219 zfcp_scsi_dbf_event_result("fail", 4, 64 zfcp_scsi_dbf_event_result("fail", 4,
220 (struct zfcp_adapter*) scpnt->device->host->hostdata[0], 65 (struct zfcp_adapter*) scpnt->device->host->hostdata[0],
@@ -223,114 +68,13 @@ zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
223 scpnt->scsi_done(scpnt); 68 scpnt->scsi_done(scpnt);
224} 69}
225 70
226/** 71static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
227 * zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and 72 void (*done) (struct scsi_cmnd *))
228 * zfcp_scsi_command_sync
229 * @adapter: adapter where scsi command is issued
230 * @unit: unit to which scsi command is sent
231 * @scpnt: scsi command to be sent
232 * @timer: timer to be started if request is successfully initiated
233 *
234 * Note: In scsi_done function must be set in scpnt.
235 */
236int
237zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit,
238 struct scsi_cmnd *scpnt, int use_timer)
239{
240 int tmp;
241 int retval;
242
243 retval = 0;
244
245 BUG_ON((adapter == NULL) || (adapter != unit->port->adapter));
246 BUG_ON(scpnt->scsi_done == NULL);
247
248 if (unlikely(NULL == unit)) {
249 zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
250 goto out;
251 }
252
253 if (unlikely(
254 atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status) ||
255 !atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status))) {
256 ZFCP_LOG_DEBUG("stopping SCSI I/O on unit 0x%016Lx on port "
257 "0x%016Lx on adapter %s\n",
258 unit->fcp_lun, unit->port->wwpn,
259 zfcp_get_busid_by_adapter(adapter));
260 zfcp_scsi_command_fail(scpnt, DID_ERROR);
261 goto out;
262 }
263
264 tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer,
265 ZFCP_REQ_AUTO_CLEANUP);
266 if (unlikely(tmp == -EBUSY)) {
267 ZFCP_LOG_DEBUG("adapter %s not ready or unit 0x%016Lx "
268 "on port 0x%016Lx in recovery\n",
269 zfcp_get_busid_by_unit(unit),
270 unit->fcp_lun, unit->port->wwpn);
271 zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
272 goto out;
273 }
274
275 if (unlikely(tmp < 0)) {
276 ZFCP_LOG_DEBUG("error: initiation of Send FCP Cmnd failed\n");
277 retval = SCSI_MLQUEUE_HOST_BUSY;
278 }
279
280out:
281 return retval;
282}
283
284static void
285zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt)
286{
287 struct completion *wait = (struct completion *) scpnt->SCp.ptr;
288 complete(wait);
289}
290
291
292/**
293 * zfcp_scsi_command_sync - send a SCSI command and wait for completion
294 * @unit: unit where command is sent to
295 * @scpnt: scsi command to be sent
296 * @use_timer: indicates whether timer should be setup or not
297 * Return: 0
298 *
299 * Errors are indicated in scpnt->result
300 */
301int
302zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt,
303 int use_timer)
304{
305 int ret;
306 DECLARE_COMPLETION_ONSTACK(wait);
307
308 scpnt->SCp.ptr = (void *) &wait; /* silent re-use */
309 scpnt->scsi_done = zfcp_scsi_command_sync_handler;
310 ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt,
311 use_timer);
312 if (ret == 0)
313 wait_for_completion(&wait);
314
315 scpnt->SCp.ptr = NULL;
316
317 return 0;
318}
319
320/*
321 * function: zfcp_scsi_queuecommand
322 *
323 * purpose: enqueues a SCSI command to the specified target device
324 *
325 * returns: 0 - success, SCSI command enqueued
326 * !0 - failure
327 */
328static int
329zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
330 void (*done) (struct scsi_cmnd *))
331{ 73{
332 struct zfcp_unit *unit; 74 struct zfcp_unit *unit;
333 struct zfcp_adapter *adapter; 75 struct zfcp_adapter *adapter;
76 int status;
77 int ret;
334 78
335 /* reset the status for this request */ 79 /* reset the status for this request */
336 scpnt->result = 0; 80 scpnt->result = 0;
@@ -342,44 +86,76 @@ zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
342 * (stored there by zfcp_scsi_slave_alloc) 86 * (stored there by zfcp_scsi_slave_alloc)
343 */ 87 */
344 adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0]; 88 adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
345 unit = (struct zfcp_unit *) scpnt->device->hostdata; 89 unit = scpnt->device->hostdata;
90
91 BUG_ON(!adapter || (adapter != unit->port->adapter));
92 BUG_ON(!scpnt->scsi_done);
346 93
347 return zfcp_scsi_command_async(adapter, unit, scpnt, 0); 94 if (unlikely(!unit)) {
95 zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
96 return 0;
97 }
98
99 status = atomic_read(&unit->status);
100 if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
101 !(status & ZFCP_STATUS_COMMON_RUNNING))) {
102 zfcp_scsi_command_fail(scpnt, DID_ERROR);
103 return 0;;
104 }
105
106 ret = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, 0,
107 ZFCP_REQ_AUTO_CLEANUP);
108 if (unlikely(ret == -EBUSY))
109 zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
110 else if (unlikely(ret < 0))
111 return SCSI_MLQUEUE_HOST_BUSY;
112
113 return ret;
348} 114}
349 115
350static struct zfcp_unit * 116static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
351zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, unsigned int id, 117 int channel, unsigned int id,
352 unsigned int lun) 118 unsigned int lun)
353{ 119{
354 struct zfcp_port *port; 120 struct zfcp_port *port;
355 struct zfcp_unit *unit, *retval = NULL; 121 struct zfcp_unit *unit;
356 122
357 list_for_each_entry(port, &adapter->port_list_head, list) { 123 list_for_each_entry(port, &adapter->port_list_head, list) {
358 if (!port->rport || (id != port->rport->scsi_target_id)) 124 if (!port->rport || (id != port->rport->scsi_target_id))
359 continue; 125 continue;
360 list_for_each_entry(unit, &port->unit_list_head, list) 126 list_for_each_entry(unit, &port->unit_list_head, list)
361 if (lun == unit->scsi_lun) { 127 if (lun == unit->scsi_lun)
362 retval = unit; 128 return unit;
363 goto out;
364 }
365 } 129 }
366 out: 130
131 return NULL;
132}
133
134static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
135{
136 struct zfcp_adapter *adapter;
137 struct zfcp_unit *unit;
138 unsigned long flags;
139 int retval = -ENXIO;
140
141 adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
142 if (!adapter)
143 goto out;
144
145 read_lock_irqsave(&zfcp_data.config_lock, flags);
146 unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
147 if (unit &&
148 (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_REGISTERED)) {
149 sdp->hostdata = unit;
150 unit->device = sdp;
151 zfcp_unit_get(unit);
152 retval = 0;
153 }
154 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
155out:
367 return retval; 156 return retval;
368} 157}
369 158
370/**
371 * zfcp_scsi_eh_abort_handler - abort the specified SCSI command
372 * @scpnt: pointer to scsi_cmnd to be aborted
373 * Return: SUCCESS - command has been aborted and cleaned up in internal
374 * bookkeeping, SCSI stack won't be called for aborted command
375 * FAILED - otherwise
376 *
377 * We do not need to care for a SCSI command which completes normally
378 * but late during this abort routine runs. We are allowed to return
379 * late commands to the SCSI stack. It tracks the state of commands and
380 * will handle late commands. (Usually, the normal completion of late
381 * commands is ignored with respect to the running abort operation.)
382 */
383static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) 159static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
384{ 160{
385 struct Scsi_Host *scsi_host; 161 struct Scsi_Host *scsi_host;
@@ -387,44 +163,37 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
387 struct zfcp_unit *unit; 163 struct zfcp_unit *unit;
388 struct zfcp_fsf_req *fsf_req; 164 struct zfcp_fsf_req *fsf_req;
389 unsigned long flags; 165 unsigned long flags;
390 unsigned long old_req_id; 166 unsigned long old_req_id = (unsigned long) scpnt->host_scribble;
391 int retval = SUCCESS; 167 int retval = SUCCESS;
392 168
393 scsi_host = scpnt->device->host; 169 scsi_host = scpnt->device->host;
394 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0]; 170 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
395 unit = (struct zfcp_unit *) scpnt->device->hostdata; 171 unit = scpnt->device->hostdata;
396
397 ZFCP_LOG_INFO("aborting scsi_cmnd=%p on adapter %s\n",
398 scpnt, zfcp_get_busid_by_adapter(adapter));
399 172
400 /* avoid race condition between late normal completion and abort */ 173 /* avoid race condition between late normal completion and abort */
401 write_lock_irqsave(&adapter->abort_lock, flags); 174 write_lock_irqsave(&adapter->abort_lock, flags);
402 175
403 /* Check whether corresponding fsf_req is still pending */ 176 /* Check whether corresponding fsf_req is still pending */
404 spin_lock(&adapter->req_list_lock); 177 spin_lock(&adapter->req_list_lock);
405 fsf_req = zfcp_reqlist_find(adapter, 178 fsf_req = zfcp_reqlist_find(adapter, old_req_id);
406 (unsigned long) scpnt->host_scribble);
407 spin_unlock(&adapter->req_list_lock); 179 spin_unlock(&adapter->req_list_lock);
408 if (!fsf_req) { 180 if (!fsf_req) {
409 write_unlock_irqrestore(&adapter->abort_lock, flags); 181 write_unlock_irqrestore(&adapter->abort_lock, flags);
410 zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0); 182 zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0);
411 retval = SUCCESS; 183 return retval;
412 goto out;
413 } 184 }
414 fsf_req->data = 0; 185 fsf_req->data = NULL;
415 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING; 186 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING;
416 old_req_id = fsf_req->req_id;
417 187
418 /* don't access old fsf_req after releasing the abort_lock */ 188 /* don't access old fsf_req after releasing the abort_lock */
419 write_unlock_irqrestore(&adapter->abort_lock, flags); 189 write_unlock_irqrestore(&adapter->abort_lock, flags);
420 190
421 fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0); 191 fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0);
422 if (!fsf_req) { 192 if (!fsf_req) {
423 ZFCP_LOG_INFO("error: initiation of Abort FCP Cmnd failed\n");
424 zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL, 193 zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL,
425 old_req_id); 194 old_req_id);
426 retval = FAILED; 195 retval = FAILED;
427 goto out; 196 return retval;
428 } 197 }
429 198
430 __wait_event(fsf_req->completion_wq, 199 __wait_event(fsf_req->completion_wq,
@@ -432,66 +201,29 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
432 201
433 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) { 202 if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) {
434 zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0); 203 zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0);
435 retval = SUCCESS;
436 } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) { 204 } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) {
437 zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0); 205 zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0);
438 retval = SUCCESS;
439 } else { 206 } else {
440 zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0); 207 zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0);
441 retval = FAILED; 208 retval = FAILED;
442 } 209 }
443 zfcp_fsf_req_free(fsf_req); 210 zfcp_fsf_req_free(fsf_req);
444 out:
445 return retval;
446}
447
448static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
449{
450 int retval;
451 struct zfcp_unit *unit = scpnt->device->hostdata;
452 211
453 if (!unit) { 212 return retval;
454 WARN_ON(1);
455 return SUCCESS;
456 }
457 retval = zfcp_task_management_function(unit,
458 FCP_LOGICAL_UNIT_RESET,
459 scpnt);
460 return retval ? FAILED : SUCCESS;
461}
462
463static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
464{
465 int retval;
466 struct zfcp_unit *unit = scpnt->device->hostdata;
467
468 if (!unit) {
469 WARN_ON(1);
470 return SUCCESS;
471 }
472 retval = zfcp_task_management_function(unit, FCP_TARGET_RESET, scpnt);
473 return retval ? FAILED : SUCCESS;
474} 213}
475 214
476static int 215static int zfcp_task_mgmt_function(struct zfcp_unit *unit, u8 tm_flags,
477zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags, 216 struct scsi_cmnd *scpnt)
478 struct scsi_cmnd *scpnt)
479{ 217{
480 struct zfcp_adapter *adapter = unit->port->adapter; 218 struct zfcp_adapter *adapter = unit->port->adapter;
481 struct zfcp_fsf_req *fsf_req; 219 struct zfcp_fsf_req *fsf_req;
482 int retval = 0; 220 int retval = SUCCESS;
483 221
484 /* issue task management function */ 222 /* issue task management function */
485 fsf_req = zfcp_fsf_send_fcp_command_task_management 223 fsf_req = zfcp_fsf_send_fcp_ctm(adapter, unit, tm_flags, 0);
486 (adapter, unit, tm_flags, 0);
487 if (!fsf_req) { 224 if (!fsf_req) {
488 ZFCP_LOG_INFO("error: creation of task management request "
489 "failed for unit 0x%016Lx on port 0x%016Lx on "
490 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
491 zfcp_get_busid_by_adapter(adapter));
492 zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt); 225 zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt);
493 retval = -ENOMEM; 226 return FAILED;
494 goto out;
495 } 227 }
496 228
497 __wait_event(fsf_req->completion_wq, 229 __wait_event(fsf_req->completion_wq,
@@ -502,87 +234,90 @@ zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags,
502 */ 234 */
503 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) { 235 if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
504 zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt); 236 zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt);
505 retval = -EIO; 237 retval = FAILED;
506 } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) { 238 } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) {
507 zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt); 239 zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt);
508 retval = -ENOTSUPP; 240 retval = FAILED;
509 } else 241 } else
510 zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt); 242 zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt);
511 243
512 zfcp_fsf_req_free(fsf_req); 244 zfcp_fsf_req_free(fsf_req);
513 out: 245
514 return retval; 246 return retval;
515} 247}
516 248
517/** 249static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
518 * zfcp_scsi_eh_host_reset_handler - handler for host reset 250{
519 */ 251 struct zfcp_unit *unit = scpnt->device->hostdata;
252
253 if (!unit) {
254 WARN_ON(1);
255 return SUCCESS;
256 }
257 return zfcp_task_mgmt_function(unit, FCP_LOGICAL_UNIT_RESET, scpnt);
258}
259
260static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
261{
262 struct zfcp_unit *unit = scpnt->device->hostdata;
263
264 if (!unit) {
265 WARN_ON(1);
266 return SUCCESS;
267 }
268 return zfcp_task_mgmt_function(unit, FCP_TARGET_RESET, scpnt);
269}
270
520static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) 271static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
521{ 272{
522 struct zfcp_unit *unit; 273 struct zfcp_unit *unit;
523 struct zfcp_adapter *adapter; 274 struct zfcp_adapter *adapter;
524 275
525 unit = (struct zfcp_unit*) scpnt->device->hostdata; 276 unit = scpnt->device->hostdata;
526 adapter = unit->port->adapter; 277 adapter = unit->port->adapter;
527
528 ZFCP_LOG_NORMAL("host reset because of problems with "
529 "unit 0x%016Lx on port 0x%016Lx, adapter %s\n",
530 unit->fcp_lun, unit->port->wwpn,
531 zfcp_get_busid_by_adapter(unit->port->adapter));
532
533 zfcp_erp_adapter_reopen(adapter, 0, 141, scpnt); 278 zfcp_erp_adapter_reopen(adapter, 0, 141, scpnt);
534 zfcp_erp_wait(adapter); 279 zfcp_erp_wait(adapter);
535 280
536 return SUCCESS; 281 return SUCCESS;
537} 282}
538 283
539int 284int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
540zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
541{ 285{
542 int retval = 0; 286 struct ccw_dev_id dev_id;
543 static unsigned int unique_id = 0;
544 287
545 if (adapter->scsi_host) 288 if (adapter->scsi_host)
546 goto out; 289 return 0;
547 290
291 ccw_device_get_id(adapter->ccw_device, &dev_id);
548 /* register adapter as SCSI host with mid layer of SCSI stack */ 292 /* register adapter as SCSI host with mid layer of SCSI stack */
549 adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template, 293 adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
550 sizeof (struct zfcp_adapter *)); 294 sizeof (struct zfcp_adapter *));
551 if (!adapter->scsi_host) { 295 if (!adapter->scsi_host) {
552 ZFCP_LOG_NORMAL("error: registration with SCSI stack failed " 296 dev_err(&adapter->ccw_device->dev,
553 "for adapter %s ", 297 "registration with SCSI stack failed.");
554 zfcp_get_busid_by_adapter(adapter)); 298 return -EIO;
555 retval = -EIO;
556 goto out;
557 } 299 }
558 ZFCP_LOG_DEBUG("host registered, scsi_host=%p\n", adapter->scsi_host);
559 300
560 /* tell the SCSI stack some characteristics of this adapter */ 301 /* tell the SCSI stack some characteristics of this adapter */
561 adapter->scsi_host->max_id = 1; 302 adapter->scsi_host->max_id = 1;
562 adapter->scsi_host->max_lun = 1; 303 adapter->scsi_host->max_lun = 1;
563 adapter->scsi_host->max_channel = 0; 304 adapter->scsi_host->max_channel = 0;
564 adapter->scsi_host->unique_id = unique_id++; /* FIXME */ 305 adapter->scsi_host->unique_id = dev_id.devno;
565 adapter->scsi_host->max_cmd_len = ZFCP_MAX_SCSI_CMND_LENGTH; 306 adapter->scsi_host->max_cmd_len = 255;
566 adapter->scsi_host->transportt = zfcp_data.scsi_transport_template; 307 adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
567 308
568 /*
569 * save a pointer to our own adapter data structure within
570 * hostdata field of SCSI host data structure
571 */
572 adapter->scsi_host->hostdata[0] = (unsigned long) adapter; 309 adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
573 310
574 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) { 311 if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
575 scsi_host_put(adapter->scsi_host); 312 scsi_host_put(adapter->scsi_host);
576 retval = -EIO; 313 return -EIO;
577 goto out;
578 } 314 }
579 atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status); 315 atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status);
580 out: 316
581 return retval; 317 return 0;
582} 318}
583 319
584void 320void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
585zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
586{ 321{
587 struct Scsi_Host *shost; 322 struct Scsi_Host *shost;
588 struct zfcp_port *port; 323 struct zfcp_port *port;
@@ -590,10 +325,12 @@ zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
590 shost = adapter->scsi_host; 325 shost = adapter->scsi_host;
591 if (!shost) 326 if (!shost)
592 return; 327 return;
328
593 read_lock_irq(&zfcp_data.config_lock); 329 read_lock_irq(&zfcp_data.config_lock);
594 list_for_each_entry(port, &adapter->port_list_head, list) 330 list_for_each_entry(port, &adapter->port_list_head, list)
595 if (port->rport) 331 if (port->rport)
596 port->rport = NULL; 332 port->rport = NULL;
333
597 read_unlock_irq(&zfcp_data.config_lock); 334 read_unlock_irq(&zfcp_data.config_lock);
598 fc_remove_host(shost); 335 fc_remove_host(shost);
599 scsi_remove_host(shost); 336 scsi_remove_host(shost);
@@ -604,9 +341,6 @@ zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
604 return; 341 return;
605} 342}
606 343
607/*
608 * Support functions for FC transport class
609 */
610static struct fc_host_statistics* 344static struct fc_host_statistics*
611zfcp_init_fc_host_stats(struct zfcp_adapter *adapter) 345zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
612{ 346{
@@ -622,13 +356,12 @@ zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
622 return adapter->fc_stats; 356 return adapter->fc_stats;
623} 357}
624 358
625static void 359static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
626zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats, 360 struct fsf_qtcb_bottom_port *data,
627 struct fsf_qtcb_bottom_port *data, 361 struct fsf_qtcb_bottom_port *old)
628 struct fsf_qtcb_bottom_port *old)
629{ 362{
630 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset - 363 fc_stats->seconds_since_last_reset =
631 old->seconds_since_last_reset; 364 data->seconds_since_last_reset - old->seconds_since_last_reset;
632 fc_stats->tx_frames = data->tx_frames - old->tx_frames; 365 fc_stats->tx_frames = data->tx_frames - old->tx_frames;
633 fc_stats->tx_words = data->tx_words - old->tx_words; 366 fc_stats->tx_words = data->tx_words - old->tx_words;
634 fc_stats->rx_frames = data->rx_frames - old->rx_frames; 367 fc_stats->rx_frames = data->rx_frames - old->rx_frames;
@@ -639,26 +372,25 @@ zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
639 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames; 372 fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
640 fc_stats->link_failure_count = data->link_failure - old->link_failure; 373 fc_stats->link_failure_count = data->link_failure - old->link_failure;
641 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync; 374 fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
642 fc_stats->loss_of_signal_count = data->loss_of_signal - 375 fc_stats->loss_of_signal_count =
643 old->loss_of_signal; 376 data->loss_of_signal - old->loss_of_signal;
644 fc_stats->prim_seq_protocol_err_count = data->psp_error_counts - 377 fc_stats->prim_seq_protocol_err_count =
645 old->psp_error_counts; 378 data->psp_error_counts - old->psp_error_counts;
646 fc_stats->invalid_tx_word_count = data->invalid_tx_words - 379 fc_stats->invalid_tx_word_count =
647 old->invalid_tx_words; 380 data->invalid_tx_words - old->invalid_tx_words;
648 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs; 381 fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
649 fc_stats->fcp_input_requests = data->input_requests - 382 fc_stats->fcp_input_requests =
650 old->input_requests; 383 data->input_requests - old->input_requests;
651 fc_stats->fcp_output_requests = data->output_requests - 384 fc_stats->fcp_output_requests =
652 old->output_requests; 385 data->output_requests - old->output_requests;
653 fc_stats->fcp_control_requests = data->control_requests - 386 fc_stats->fcp_control_requests =
654 old->control_requests; 387 data->control_requests - old->control_requests;
655 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb; 388 fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
656 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb; 389 fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
657} 390}
658 391
659static void 392static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
660zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats, 393 struct fsf_qtcb_bottom_port *data)
661 struct fsf_qtcb_bottom_port *data)
662{ 394{
663 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset; 395 fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
664 fc_stats->tx_frames = data->tx_frames; 396 fc_stats->tx_frames = data->tx_frames;
@@ -682,22 +414,14 @@ zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
682 fc_stats->fcp_output_megabytes = data->output_mb; 414 fc_stats->fcp_output_megabytes = data->output_mb;
683} 415}
684 416
685/** 417static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
686 * zfcp_get_fc_host_stats - provide fc_host_statistics for scsi_transport_fc
687 *
688 * assumption: scsi_transport_fc synchronizes calls of
689 * get_fc_host_stats and reset_fc_host_stats
690 * (XXX to be checked otherwise introduce locking)
691 */
692static struct fc_host_statistics *
693zfcp_get_fc_host_stats(struct Scsi_Host *shost)
694{ 418{
695 struct zfcp_adapter *adapter; 419 struct zfcp_adapter *adapter;
696 struct fc_host_statistics *fc_stats; 420 struct fc_host_statistics *fc_stats;
697 struct fsf_qtcb_bottom_port *data; 421 struct fsf_qtcb_bottom_port *data;
698 int ret; 422 int ret;
699 423
700 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 424 adapter = (struct zfcp_adapter *)host->hostdata[0];
701 fc_stats = zfcp_init_fc_host_stats(adapter); 425 fc_stats = zfcp_init_fc_host_stats(adapter);
702 if (!fc_stats) 426 if (!fc_stats)
703 return NULL; 427 return NULL;
@@ -709,26 +433,25 @@ zfcp_get_fc_host_stats(struct Scsi_Host *shost)
709 ret = zfcp_fsf_exchange_port_data_sync(adapter, data); 433 ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
710 if (ret) { 434 if (ret) {
711 kfree(data); 435 kfree(data);
712 return NULL; /* XXX return zeroed fc_stats? */ 436 return NULL;
713 } 437 }
714 438
715 if (adapter->stats_reset && 439 if (adapter->stats_reset &&
716 ((jiffies/HZ - adapter->stats_reset) < 440 ((jiffies/HZ - adapter->stats_reset) <
717 data->seconds_since_last_reset)) { 441 data->seconds_since_last_reset))
718 zfcp_adjust_fc_host_stats(fc_stats, data, 442 zfcp_adjust_fc_host_stats(fc_stats, data,
719 adapter->stats_reset_data); 443 adapter->stats_reset_data);
720 } else 444 else
721 zfcp_set_fc_host_stats(fc_stats, data); 445 zfcp_set_fc_host_stats(fc_stats, data);
722 446
723 kfree(data); 447 kfree(data);
724 return fc_stats; 448 return fc_stats;
725} 449}
726 450
727static void 451static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
728zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
729{ 452{
730 struct zfcp_adapter *adapter; 453 struct zfcp_adapter *adapter;
731 struct fsf_qtcb_bottom_port *data, *old_data; 454 struct fsf_qtcb_bottom_port *data;
732 int ret; 455 int ret;
733 456
734 adapter = (struct zfcp_adapter *)shost->hostdata[0]; 457 adapter = (struct zfcp_adapter *)shost->hostdata[0];
@@ -737,17 +460,33 @@ zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
737 return; 460 return;
738 461
739 ret = zfcp_fsf_exchange_port_data_sync(adapter, data); 462 ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
740 if (ret) { 463 if (ret)
741 kfree(data); 464 kfree(data);
742 } else { 465 else {
743 adapter->stats_reset = jiffies/HZ; 466 adapter->stats_reset = jiffies/HZ;
744 old_data = adapter->stats_reset_data; 467 kfree(adapter->stats_reset_data);
745 adapter->stats_reset_data = data; /* finally freed in 468 adapter->stats_reset_data = data; /* finally freed in
746 adater_dequeue */ 469 adapter_dequeue */
747 kfree(old_data);
748 } 470 }
749} 471}
750 472
473static void zfcp_get_host_port_state(struct Scsi_Host *shost)
474{
475 struct zfcp_adapter *adapter =
476 (struct zfcp_adapter *)shost->hostdata[0];
477 int status = atomic_read(&adapter->status);
478
479 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
480 !(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
481 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
482 else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
483 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
484 else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
485 fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
486 else
487 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
488}
489
751static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 490static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
752{ 491{
753 rport->dev_loss_tmo = timeout; 492 rport->dev_loss_tmo = timeout;
@@ -770,6 +509,8 @@ struct fc_function_template zfcp_transport_functions = {
770 .get_fc_host_stats = zfcp_get_fc_host_stats, 509 .get_fc_host_stats = zfcp_get_fc_host_stats,
771 .reset_fc_host_stats = zfcp_reset_fc_host_stats, 510 .reset_fc_host_stats = zfcp_reset_fc_host_stats,
772 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo, 511 .set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
512 .get_host_port_state = zfcp_get_host_port_state,
513 .show_host_port_state = 1,
773 /* no functions registered for following dynamic attributes but 514 /* no functions registered for following dynamic attributes but
774 directly set by LLDD */ 515 directly set by LLDD */
775 .show_host_port_type = 1, 516 .show_host_port_type = 1,
@@ -778,149 +519,26 @@ struct fc_function_template zfcp_transport_functions = {
778 .disable_target_scan = 1, 519 .disable_target_scan = 1,
779}; 520};
780 521
781/** 522struct zfcp_data zfcp_data = {
782 * ZFCP_DEFINE_SCSI_ATTR 523 .scsi_host_template = {
783 * @_name: name of show attribute 524 .name = "zfcp",
784 * @_format: format string 525 .module = THIS_MODULE,
785 * @_value: value to print 526 .proc_name = "zfcp",
786 * 527 .slave_alloc = zfcp_scsi_slave_alloc,
787 * Generates attribute for a unit. 528 .slave_configure = zfcp_scsi_slave_configure,
788 */ 529 .slave_destroy = zfcp_scsi_slave_destroy,
789#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \ 530 .queuecommand = zfcp_scsi_queuecommand,
790static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr, \ 531 .eh_abort_handler = zfcp_scsi_eh_abort_handler,
791 char *buf) \ 532 .eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
792{ \ 533 .eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
793 struct scsi_device *sdev; \ 534 .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
794 struct zfcp_unit *unit; \ 535 .can_queue = 4096,
795 \ 536 .this_id = -1,
796 sdev = to_scsi_device(dev); \ 537 .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ,
797 unit = sdev->hostdata; \ 538 .cmd_per_lun = 1,
798 return sprintf(buf, _format, _value); \ 539 .use_clustering = 1,
799} \ 540 .sdev_attrs = zfcp_sysfs_sdev_attrs,
800 \ 541 .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8),
801static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL); 542 .shost_attrs = zfcp_sysfs_shost_attrs,
802 543 },
803ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", zfcp_get_busid_by_unit(unit));
804ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn);
805ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun);
806
807static struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
808 &dev_attr_fcp_lun,
809 &dev_attr_wwpn,
810 &dev_attr_hba_id,
811 NULL
812};
813
814static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
815 struct device_attribute *attr,
816 char *buf)
817{
818 struct Scsi_Host *scsi_host = dev_to_shost(dev);
819 struct fsf_qtcb_bottom_port *qtcb_port;
820 int retval;
821 struct zfcp_adapter *adapter;
822
823 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
824 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
825 return -EOPNOTSUPP;
826
827 qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
828 if (!qtcb_port)
829 return -ENOMEM;
830
831 retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port);
832 if (!retval)
833 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
834 qtcb_port->cb_util, qtcb_port->a_util);
835 kfree(qtcb_port);
836 return retval;
837}
838
839static int zfcp_sysfs_adapter_ex_config(struct device *dev,
840 struct fsf_statistics_info *stat_inf)
841{
842 int retval;
843 struct fsf_qtcb_bottom_config *qtcb_config;
844 struct Scsi_Host *scsi_host = dev_to_shost(dev);
845 struct zfcp_adapter *adapter;
846
847 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
848 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
849 return -EOPNOTSUPP;
850
851 qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
852 GFP_KERNEL);
853 if (!qtcb_config)
854 return -ENOMEM;
855
856 retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config);
857 if (!retval)
858 *stat_inf = qtcb_config->stat_info;
859
860 kfree(qtcb_config);
861 return retval;
862}
863
864static ssize_t zfcp_sysfs_adapter_request_show(struct device *dev,
865 struct device_attribute *attr,
866 char *buf)
867{
868 struct fsf_statistics_info stat_info;
869 int retval;
870
871 retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);
872 if (retval)
873 return retval;
874
875 return sprintf(buf, "%llu %llu %llu\n",
876 (unsigned long long) stat_info.input_req,
877 (unsigned long long) stat_info.output_req,
878 (unsigned long long) stat_info.control_req);
879}
880
881static ssize_t zfcp_sysfs_adapter_mb_show(struct device *dev,
882 struct device_attribute *attr,
883 char *buf)
884{
885 struct fsf_statistics_info stat_info;
886 int retval;
887
888 retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);
889 if (retval)
890 return retval;
891
892 return sprintf(buf, "%llu %llu\n",
893 (unsigned long long) stat_info.input_mb,
894 (unsigned long long) stat_info.output_mb);
895}
896
897static ssize_t zfcp_sysfs_adapter_sec_active_show(struct device *dev,
898 struct device_attribute *attr,
899 char *buf)
900{
901 struct fsf_statistics_info stat_info;
902 int retval;
903
904 retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);
905 if (retval)
906 return retval;
907
908 return sprintf(buf, "%llu\n",
909 (unsigned long long) stat_info.seconds_act);
910}
911
912static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
913static DEVICE_ATTR(requests, S_IRUGO, zfcp_sysfs_adapter_request_show, NULL);
914static DEVICE_ATTR(megabytes, S_IRUGO, zfcp_sysfs_adapter_mb_show, NULL);
915static DEVICE_ATTR(seconds_active, S_IRUGO,
916 zfcp_sysfs_adapter_sec_active_show, NULL);
917
918static struct device_attribute *zfcp_a_stats_attrs[] = {
919 &dev_attr_utilization,
920 &dev_attr_requests,
921 &dev_attr_megabytes,
922 &dev_attr_seconds_active,
923 NULL
924}; 544};
925
926#undef ZFCP_LOG_AREA
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 05:36:12 -0500