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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-01-02 10:12:51 -0500
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-01-02 10:12:51 -0500
commit93c164af19f608c5f737eb9bed8cb4de3a872329 (patch)
tree3a109f884e7db11e8201b255243c3a4b4e82d1ba
parent07bd3f4731f9c7ebcbab90905ca4ad6fc6825f96 (diff)
remove ide-scsi
As planed, this removes ide-scsi. The 2.6 kernel supports direct writing to ide CD drives, which eliminates the need for ide-scsi. ide-scsi has been unmaintained and marked as deprecated. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James.Bottomley@HansenPartnership.com Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat
-rw-r--r--Documentation/feature-removal-schedule.txt9
-rw-r--r--MAINTAINERS5
-rw-r--r--drivers/ide/Kconfig17
-rw-r--r--drivers/scsi/Kconfig8
-rw-r--r--drivers/scsi/Makefile1
-rw-r--r--drivers/scsi/ide-scsi.c840
6 files changed, 4 insertions, 876 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index dc7c681e532c..df18d87c4837 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -310,15 +310,6 @@ Who: Krzysztof Piotr Oledzki <ole@ans.pl>
310 310
311--------------------------- 311---------------------------
312 312
313What: ide-scsi (BLK_DEV_IDESCSI)
314When: 2.6.29
315Why: The 2.6 kernel supports direct writing to ide CD drives, which
316 eliminates the need for ide-scsi. The new method is more
317 efficient in every way.
318Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
319
320---------------------------
321
322What: i2c_attach_client(), i2c_detach_client(), i2c_driver->detach_client() 313What: i2c_attach_client(), i2c_detach_client(), i2c_driver->detach_client()
323When: 2.6.29 (ideally) or 2.6.30 (more likely) 314When: 2.6.29 (ideally) or 2.6.30 (more likely)
324Why: Deprecated by the new (standard) device driver binding model. Use 315Why: Deprecated by the new (standard) device driver binding model. Use
diff --git a/MAINTAINERS b/MAINTAINERS
index ceb32ee51f9d..144766c0dba3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2146,11 +2146,6 @@ M: Gadi Oxman <gadio@netvision.net.il>
2146L: linux-kernel@vger.kernel.org 2146L: linux-kernel@vger.kernel.org
2147S: Maintained 2147S: Maintained
2148 2148
2149IDE-SCSI DRIVER
2150L: linux-ide@vger.kernel.org
2151L: linux-scsi@vger.kernel.org
2152S: Orphan
2153
2154IDLE-I7300 2149IDLE-I7300
2155P: Andy Henroid 2150P: Andy Henroid
2156M: andrew.d.henroid@intel.com 2151M: andrew.d.henroid@intel.com
diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index c9f21e3d4ead..937945e471df 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -185,23 +185,6 @@ config BLK_DEV_IDETAPE
185 To compile this driver as a module, choose M here: the 185 To compile this driver as a module, choose M here: the
186 module will be called ide-tape. 186 module will be called ide-tape.
187 187
188config BLK_DEV_IDESCSI
189 tristate "SCSI emulation support (DEPRECATED)"
190 depends on SCSI
191 select IDE_ATAPI
192 ---help---
193 WARNING: ide-scsi is no longer needed for cd writing applications!
194 The 2.6 kernel supports direct writing to ide-cd, which eliminates
195 the need for ide-scsi + the entire scsi stack just for writing a
196 cd. The new method is more efficient in every way.
197
198 This will provide SCSI host adapter emulation for IDE ATAPI devices,
199 and will allow you to use a SCSI device driver instead of a native
200 ATAPI driver.
201
202 If both this SCSI emulation and native ATAPI support are compiled
203 into the kernel, the native support will be used.
204
205config BLK_DEV_IDEACPI 188config BLK_DEV_IDEACPI
206 bool "IDE ACPI support" 189 bool "IDE ACPI support"
207 depends on ACPI 190 depends on ACPI
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 152d4aa9354f..b7322976d2b7 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -21,7 +21,7 @@ config SCSI
21 You also need to say Y here if you have a device which speaks 21 You also need to say Y here if you have a device which speaks
22 the SCSI protocol. Examples of this include the parallel port 22 the SCSI protocol. Examples of this include the parallel port
23 version of the IOMEGA ZIP drive, USB storage devices, Fibre 23 version of the IOMEGA ZIP drive, USB storage devices, Fibre
24 Channel, FireWire storage and the IDE-SCSI emulation driver. 24 Channel, and FireWire storage.
25 25
26 To compile this driver as a module, choose M here and read 26 To compile this driver as a module, choose M here and read
27 <file:Documentation/scsi/scsi.txt>. 27 <file:Documentation/scsi/scsi.txt>.
@@ -101,9 +101,9 @@ config CHR_DEV_OSST
101 ---help--- 101 ---help---
102 The OnStream SC-x0 SCSI tape drives cannot be driven by the 102 The OnStream SC-x0 SCSI tape drives cannot be driven by the
103 standard st driver, but instead need this special osst driver and 103 standard st driver, but instead need this special osst driver and
104 use the /dev/osstX char device nodes (major 206). Via usb-storage 104 use the /dev/osstX char device nodes (major 206). Via usb-storage,
105 and ide-scsi, you may be able to drive the USB-x0 and DI-x0 drives 105 you may be able to drive the USB-x0 and DI-x0 drives as well.
106 as well. Note that there is also a second generation of OnStream 106 Note that there is also a second generation of OnStream
107 tape drives (ADR-x0) that supports the standard SCSI-2 commands for 107 tape drives (ADR-x0) that supports the standard SCSI-2 commands for
108 tapes (QIC-157) and can be driven by the standard driver st. 108 tapes (QIC-157) and can be driven by the standard driver st.
109 For more information, you may have a look at the SCSI-HOWTO 109 For more information, you may have a look at the SCSI-HOWTO
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 1410697257cb..7461eb09a031 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -105,7 +105,6 @@ obj-$(CONFIG_SCSI_GDTH) += gdth.o
105obj-$(CONFIG_SCSI_INITIO) += initio.o 105obj-$(CONFIG_SCSI_INITIO) += initio.o
106obj-$(CONFIG_SCSI_INIA100) += a100u2w.o 106obj-$(CONFIG_SCSI_INIA100) += a100u2w.o
107obj-$(CONFIG_SCSI_QLOGICPTI) += qlogicpti.o 107obj-$(CONFIG_SCSI_QLOGICPTI) += qlogicpti.o
108obj-$(CONFIG_BLK_DEV_IDESCSI) += ide-scsi.o
109obj-$(CONFIG_SCSI_MESH) += mesh.o 108obj-$(CONFIG_SCSI_MESH) += mesh.o
110obj-$(CONFIG_SCSI_MAC53C94) += mac53c94.o 109obj-$(CONFIG_SCSI_MAC53C94) += mac53c94.o
111obj-$(CONFIG_BLK_DEV_3W_XXXX_RAID) += 3w-xxxx.o 110obj-$(CONFIG_BLK_DEV_3W_XXXX_RAID) += 3w-xxxx.o
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
deleted file mode 100644
index c24140aff8e7..000000000000
--- a/drivers/scsi/ide-scsi.c
+++ /dev/null
@@ -1,840 +0,0 @@
1/*
2 * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
3 * Copyright (C) 2004-2005 Bartlomiej Zolnierkiewicz
4 */
5
6/*
7 * Emulation of a SCSI host adapter for IDE ATAPI devices.
8 *
9 * With this driver, one can use the Linux SCSI drivers instead of the
10 * native IDE ATAPI drivers.
11 *
12 * Ver 0.1 Dec 3 96 Initial version.
13 * Ver 0.2 Jan 26 97 Fixed bug in cleanup_module() and added emulation
14 * of MODE_SENSE_6/MODE_SELECT_6 for cdroms. Thanks
15 * to Janos Farkas for pointing this out.
16 * Avoid using bitfields in structures for m68k.
17 * Added Scatter/Gather and DMA support.
18 * Ver 0.4 Dec 7 97 Add support for ATAPI PD/CD drives.
19 * Use variable timeout for each command.
20 * Ver 0.5 Jan 2 98 Fix previous PD/CD support.
21 * Allow disabling of SCSI-6 to SCSI-10 transformation.
22 * Ver 0.6 Jan 27 98 Allow disabling of SCSI command translation layer
23 * for access through /dev/sg.
24 * Fix MODE_SENSE_6/MODE_SELECT_6/INQUIRY translation.
25 * Ver 0.7 Dec 04 98 Ignore commands where lun != 0 to avoid multiple
26 * detection of devices with CONFIG_SCSI_MULTI_LUN
27 * Ver 0.8 Feb 05 99 Optical media need translation too. Reverse 0.7.
28 * Ver 0.9 Jul 04 99 Fix a bug in SG_SET_TRANSFORM.
29 * Ver 0.91 Jun 10 02 Fix "off by one" error in transforms
30 * Ver 0.92 Dec 31 02 Implement new SCSI mid level API
31 */
32
33#define IDESCSI_VERSION "0.92"
34
35#include <linux/module.h>
36#include <linux/types.h>
37#include <linux/string.h>
38#include <linux/kernel.h>
39#include <linux/mm.h>
40#include <linux/ioport.h>
41#include <linux/blkdev.h>
42#include <linux/errno.h>
43#include <linux/slab.h>
44#include <linux/ide.h>
45#include <linux/scatterlist.h>
46#include <linux/delay.h>
47#include <linux/mutex.h>
48#include <linux/bitops.h>
49
50#include <asm/io.h>
51#include <asm/uaccess.h>
52
53#include <scsi/scsi.h>
54#include <scsi/scsi_cmnd.h>
55#include <scsi/scsi_device.h>
56#include <scsi/scsi_host.h>
57#include <scsi/scsi_tcq.h>
58#include <scsi/sg.h>
59
60#define IDESCSI_DEBUG_LOG 0
61
62#if IDESCSI_DEBUG_LOG
63#define debug_log(fmt, args...) \
64 printk(KERN_INFO "ide-scsi: " fmt, ## args)
65#else
66#define debug_log(fmt, args...) do {} while (0)
67#endif
68
69/*
70 * SCSI command transformation layer
71 */
72#define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */
73
74/*
75 * Log flags
76 */
77#define IDESCSI_LOG_CMD 0 /* Log SCSI commands */
78
79typedef struct ide_scsi_obj {
80 ide_drive_t *drive;
81 ide_driver_t *driver;
82 struct gendisk *disk;
83 struct Scsi_Host *host;
84
85 unsigned long transform; /* SCSI cmd translation layer */
86 unsigned long log; /* log flags */
87} idescsi_scsi_t;
88
89static DEFINE_MUTEX(idescsi_ref_mutex);
90/* Set by module param to skip cd */
91static int idescsi_nocd;
92
93#define ide_scsi_g(disk) \
94 container_of((disk)->private_data, struct ide_scsi_obj, driver)
95
96static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk)
97{
98 struct ide_scsi_obj *scsi = NULL;
99
100 mutex_lock(&idescsi_ref_mutex);
101 scsi = ide_scsi_g(disk);
102 if (scsi) {
103 if (ide_device_get(scsi->drive))
104 scsi = NULL;
105 else
106 scsi_host_get(scsi->host);
107 }
108 mutex_unlock(&idescsi_ref_mutex);
109 return scsi;
110}
111
112static void ide_scsi_put(struct ide_scsi_obj *scsi)
113{
114 ide_drive_t *drive = scsi->drive;
115
116 mutex_lock(&idescsi_ref_mutex);
117 scsi_host_put(scsi->host);
118 ide_device_put(drive);
119 mutex_unlock(&idescsi_ref_mutex);
120}
121
122static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host)
123{
124 return (idescsi_scsi_t*) (&host[1]);
125}
126
127static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
128{
129 return scsihost_to_idescsi(ide_drive->driver_data);
130}
131
132static void ide_scsi_hex_dump(u8 *data, int len)
133{
134 print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
135}
136
137static int idescsi_end_request(ide_drive_t *, int, int);
138
139static void ide_scsi_callback(ide_drive_t *drive, int dsc)
140{
141 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
142 struct ide_atapi_pc *pc = drive->pc;
143
144 if (pc->flags & PC_FLAG_TIMEDOUT)
145 debug_log("%s: got timed out packet %lu at %lu\n", __func__,
146 pc->scsi_cmd->serial_number, jiffies);
147 /* end this request now - scsi should retry it*/
148 else if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
149 printk(KERN_INFO "Packet command completed, %d bytes"
150 " transferred\n", pc->xferred);
151
152 idescsi_end_request(drive, 1, 0);
153}
154
155static int idescsi_check_condition(ide_drive_t *drive,
156 struct request *failed_cmd)
157{
158 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
159 struct ide_atapi_pc *pc;
160 struct request *rq;
161 u8 *buf;
162
163 /* stuff a sense request in front of our current request */
164 pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
165 rq = blk_get_request(drive->queue, READ, GFP_ATOMIC);
166 buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
167 if (!pc || !rq || !buf) {
168 kfree(buf);
169 if (rq)
170 blk_put_request(rq);
171 kfree(pc);
172 return -ENOMEM;
173 }
174 rq->special = (char *) pc;
175 pc->rq = rq;
176 pc->buf = buf;
177 pc->c[0] = REQUEST_SENSE;
178 pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE;
179 rq->cmd_type = REQ_TYPE_SENSE;
180 rq->cmd_flags |= REQ_PREEMPT;
181 pc->timeout = jiffies + WAIT_READY;
182 /* NOTE! Save the failed packet command in "rq->buffer" */
183 rq->buffer = (void *) failed_cmd->special;
184 pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd;
185 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
186 printk ("ide-scsi: %s: queue cmd = ", drive->name);
187 ide_scsi_hex_dump(pc->c, 6);
188 }
189 rq->rq_disk = scsi->disk;
190 rq->ref_count++;
191 memcpy(rq->cmd, pc->c, 12);
192 ide_do_drive_cmd(drive, rq);
193 return 0;
194}
195
196static ide_startstop_t
197idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
198{
199 ide_hwif_t *hwif = drive->hwif;
200
201 if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
202 /* force an abort */
203 hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
204
205 rq->errors++;
206
207 idescsi_end_request(drive, 0, 0);
208
209 return ide_stopped;
210}
211
212static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
213{
214 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
215 struct request *rq = HWGROUP(drive)->rq;
216 struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special;
217 int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
218 struct Scsi_Host *host;
219 int errors = rq->errors;
220 unsigned long flags;
221
222 if (!blk_special_request(rq) && !blk_sense_request(rq)) {
223 ide_end_request(drive, uptodate, nrsecs);
224 return 0;
225 }
226 ide_end_drive_cmd (drive, 0, 0);
227 if (blk_sense_request(rq)) {
228 struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer;
229 if (log) {
230 printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
231 ide_scsi_hex_dump(pc->buf, 16);
232 }
233 memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf,
234 SCSI_SENSE_BUFFERSIZE);
235 kfree(pc->buf);
236 kfree(pc);
237 blk_put_request(rq);
238 pc = opc;
239 rq = pc->rq;
240 pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
241 (((pc->flags & PC_FLAG_TIMEDOUT) ?
242 DID_TIME_OUT :
243 DID_OK) << 16);
244 } else if (pc->flags & PC_FLAG_TIMEDOUT) {
245 if (log)
246 printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n",
247 drive->name, pc->scsi_cmd->serial_number);
248 pc->scsi_cmd->result = DID_TIME_OUT << 16;
249 } else if (errors >= ERROR_MAX) {
250 pc->scsi_cmd->result = DID_ERROR << 16;
251 if (log)
252 printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number);
253 } else if (errors) {
254 if (log)
255 printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number);
256 if (!idescsi_check_condition(drive, rq))
257 /* we started a request sense, so we'll be back, exit for now */
258 return 0;
259 pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
260 } else {
261 pc->scsi_cmd->result = DID_OK << 16;
262 }
263 host = pc->scsi_cmd->device->host;
264 spin_lock_irqsave(host->host_lock, flags);
265 pc->done(pc->scsi_cmd);
266 spin_unlock_irqrestore(host->host_lock, flags);
267 kfree(pc);
268 blk_put_request(rq);
269 drive->pc = NULL;
270 return 0;
271}
272
273static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
274{
275 switch (pc->c[0]) {
276 case READ_6: case READ_10: case READ_12:
277 pc->flags &= ~PC_FLAG_WRITING;
278 return 0;
279 case WRITE_6: case WRITE_10: case WRITE_12:
280 pc->flags |= PC_FLAG_WRITING;
281 return 0;
282 default:
283 return 1;
284 }
285}
286
287static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc)
288{
289 ide_hwif_t *hwif = drive->hwif;
290 struct scatterlist *sg, *scsi_sg;
291 int segments;
292
293 if (!pc->req_xfer || pc->req_xfer % 1024)
294 return 1;
295
296 if (idescsi_set_direction(pc))
297 return 1;
298
299 sg = hwif->sg_table;
300 scsi_sg = scsi_sglist(pc->scsi_cmd);
301 segments = scsi_sg_count(pc->scsi_cmd);
302
303 if (segments > hwif->sg_max_nents)
304 return 1;
305
306 hwif->sg_nents = segments;
307 memcpy(sg, scsi_sg, sizeof(*sg) * segments);
308
309 return 0;
310}
311
312static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
313 struct ide_atapi_pc *pc)
314{
315 /* Set the current packet command */
316 drive->pc = pc;
317
318 return ide_issue_pc(drive, ide_scsi_get_timeout(pc), ide_scsi_expiry);
319}
320
321/*
322 * idescsi_do_request is our request handling function.
323 */
324static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
325{
326 debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,
327 rq->cmd[0], rq->errors);
328 debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
329 rq->sector, rq->nr_sectors, rq->current_nr_sectors);
330
331 if (blk_sense_request(rq) || blk_special_request(rq)) {
332 struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special;
333
334 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) &&
335 idescsi_map_sg(drive, pc) == 0)
336 pc->flags |= PC_FLAG_DMA_OK;
337
338 return idescsi_issue_pc(drive, pc);
339 }
340 blk_dump_rq_flags(rq, "ide-scsi: unsup command");
341 idescsi_end_request (drive, 0, 0);
342 return ide_stopped;
343}
344
345#ifdef CONFIG_IDE_PROC_FS
346static ide_proc_entry_t idescsi_proc[] = {
347 { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
348 { NULL, 0, NULL, NULL }
349};
350
351#define ide_scsi_devset_get(name, field) \
352static int get_##name(ide_drive_t *drive) \
353{ \
354 idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
355 return scsi->field; \
356}
357
358#define ide_scsi_devset_set(name, field) \
359static int set_##name(ide_drive_t *drive, int arg) \
360{ \
361 idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
362 scsi->field = arg; \
363 return 0; \
364}
365
366#define ide_scsi_devset_rw_field(_name, _field) \
367ide_scsi_devset_get(_name, _field); \
368ide_scsi_devset_set(_name, _field); \
369IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name);
370
371ide_devset_rw_field(bios_cyl, bios_cyl);
372ide_devset_rw_field(bios_head, bios_head);
373ide_devset_rw_field(bios_sect, bios_sect);
374
375ide_scsi_devset_rw_field(transform, transform);
376ide_scsi_devset_rw_field(log, log);
377
378static const struct ide_proc_devset idescsi_settings[] = {
379 IDE_PROC_DEVSET(bios_cyl, 0, 1023),
380 IDE_PROC_DEVSET(bios_head, 0, 255),
381 IDE_PROC_DEVSET(bios_sect, 0, 63),
382 IDE_PROC_DEVSET(log, 0, 1),
383 IDE_PROC_DEVSET(transform, 0, 3),
384 { 0 },
385};
386
387static ide_proc_entry_t *ide_scsi_proc_entries(ide_drive_t *drive)
388{
389 return idescsi_proc;
390}
391
392static const struct ide_proc_devset *ide_scsi_proc_devsets(ide_drive_t *drive)
393{
394 return idescsi_settings;
395}
396#endif
397
398/*
399 * Driver initialization.
400 */
401static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
402{
403 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
404#if IDESCSI_DEBUG_LOG
405 set_bit(IDESCSI_LOG_CMD, &scsi->log);
406#endif /* IDESCSI_DEBUG_LOG */
407
408 drive->pc_callback = ide_scsi_callback;
409 drive->pc_update_buffers = NULL;
410 drive->pc_io_buffers = ide_io_buffers;
411
412 ide_proc_register_driver(drive, scsi->driver);
413}
414
415static void ide_scsi_remove(ide_drive_t *drive)
416{
417 struct Scsi_Host *scsihost = drive->driver_data;
418 struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
419 struct gendisk *g = scsi->disk;
420
421 scsi_remove_host(scsihost);
422 ide_proc_unregister_driver(drive, scsi->driver);
423
424 ide_unregister_region(g);
425
426 drive->driver_data = NULL;
427 g->private_data = NULL;
428 put_disk(g);
429
430 ide_scsi_put(scsi);
431
432 drive->dev_flags &= ~IDE_DFLAG_SCSI;
433}
434
435static int ide_scsi_probe(ide_drive_t *);
436
437static ide_driver_t idescsi_driver = {
438 .gen_driver = {
439 .owner = THIS_MODULE,
440 .name = "ide-scsi",
441 .bus = &ide_bus_type,
442 },
443 .probe = ide_scsi_probe,
444 .remove = ide_scsi_remove,
445 .version = IDESCSI_VERSION,
446 .do_request = idescsi_do_request,
447 .end_request = idescsi_end_request,
448 .error = idescsi_atapi_error,
449#ifdef CONFIG_IDE_PROC_FS
450 .proc_entries = ide_scsi_proc_entries,
451 .proc_devsets = ide_scsi_proc_devsets,
452#endif
453};
454
455static int idescsi_ide_open(struct block_device *bdev, fmode_t mode)
456{
457 struct ide_scsi_obj *scsi = ide_scsi_get(bdev->bd_disk);
458
459 if (!scsi)
460 return -ENXIO;
461
462 return 0;
463}
464
465static int idescsi_ide_release(struct gendisk *disk, fmode_t mode)
466{
467 ide_scsi_put(ide_scsi_g(disk));
468 return 0;
469}
470
471static int idescsi_ide_ioctl(struct block_device *bdev, fmode_t mode,
472 unsigned int cmd, unsigned long arg)
473{
474 struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk);
475 return generic_ide_ioctl(scsi->drive, bdev, cmd, arg);
476}
477
478static struct block_device_operations idescsi_ops = {
479 .owner = THIS_MODULE,
480 .open = idescsi_ide_open,
481 .release = idescsi_ide_release,
482 .locked_ioctl = idescsi_ide_ioctl,
483};
484
485static int idescsi_slave_configure(struct scsi_device * sdp)
486{
487 /* Configure detected device */
488 sdp->use_10_for_rw = 1;
489 sdp->use_10_for_ms = 1;
490 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
491 return 0;
492}
493
494static const char *idescsi_info (struct Scsi_Host *host)
495{
496 return "SCSI host adapter emulation for IDE ATAPI devices";
497}
498
499static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg)
500{
501 idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host);
502
503 if (cmd == SG_SET_TRANSFORM) {
504 if (arg)
505 set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
506 else
507 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
508 return 0;
509 } else if (cmd == SG_GET_TRANSFORM)
510 return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg);
511 return -EINVAL;
512}
513
514static int idescsi_queue (struct scsi_cmnd *cmd,
515 void (*done)(struct scsi_cmnd *))
516{
517 struct Scsi_Host *host = cmd->device->host;
518 idescsi_scsi_t *scsi = scsihost_to_idescsi(host);
519 ide_drive_t *drive = scsi->drive;
520 struct request *rq = NULL;
521 struct ide_atapi_pc *pc = NULL;
522 int write = cmd->sc_data_direction == DMA_TO_DEVICE;
523
524 if (!drive) {
525 scmd_printk (KERN_ERR, cmd, "drive not present\n");
526 goto abort;
527 }
528 scsi = drive_to_idescsi(drive);
529 pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
530 rq = blk_get_request(drive->queue, write, GFP_ATOMIC);
531 if (rq == NULL || pc == NULL) {
532 printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
533 goto abort;
534 }
535
536 memset (pc->c, 0, 12);
537 pc->flags = 0;
538 if (cmd->sc_data_direction == DMA_TO_DEVICE)
539 pc->flags |= PC_FLAG_WRITING;
540 pc->rq = rq;
541 memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
542 pc->buf = NULL;
543 pc->sg = scsi_sglist(cmd);
544 pc->sg_cnt = scsi_sg_count(cmd);
545 pc->b_count = 0;
546 pc->req_xfer = pc->buf_size = scsi_bufflen(cmd);
547 pc->scsi_cmd = cmd;
548 pc->done = done;
549 pc->timeout = jiffies + cmd->request->timeout;
550
551 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
552 printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
553 ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len);
554 if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) {
555 printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number);
556 ide_scsi_hex_dump(pc->c, 12);
557 }
558 }
559
560 rq->special = (char *) pc;
561 rq->cmd_type = REQ_TYPE_SPECIAL;
562 spin_unlock_irq(host->host_lock);
563 rq->ref_count++;
564 memcpy(rq->cmd, pc->c, 12);
565 blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL);
566 spin_lock_irq(host->host_lock);
567 return 0;
568abort:
569 kfree (pc);
570 if (rq)
571 blk_put_request(rq);
572 cmd->result = DID_ERROR << 16;
573 done(cmd);
574 return 0;
575}
576
577static int idescsi_eh_abort (struct scsi_cmnd *cmd)
578{
579 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
580 ide_drive_t *drive = scsi->drive;
581 ide_hwif_t *hwif;
582 ide_hwgroup_t *hwgroup;
583 int busy;
584 int ret = FAILED;
585
586 struct ide_atapi_pc *pc;
587
588 /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
589
590 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
591 printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number);
592
593 if (!drive) {
594 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n");
595 WARN_ON(1);
596 goto no_drive;
597 }
598
599 hwif = drive->hwif;
600 hwgroup = hwif->hwgroup;
601
602 /* First give it some more time, how much is "right" is hard to say :-(
603 FIXME - uses mdelay which causes latency? */
604 busy = ide_wait_not_busy(hwif, 100);
605 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
606 printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":"");
607
608 spin_lock_irq(&hwgroup->lock);
609
610 /* If there is no pc running we're done (our interrupt took care of it) */
611 pc = drive->pc;
612 if (pc == NULL) {
613 ret = SUCCESS;
614 goto ide_unlock;
615 }
616
617 /* It's somewhere in flight. Does ide subsystem agree? */
618 if (pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
619 elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != pc->rq) {
620 /*
621 * FIXME - not sure this condition can ever occur
622 */
623 printk (KERN_ERR "ide-scsi: cmd aborted!\n");
624
625 if (blk_sense_request(pc->rq))
626 kfree(pc->buf);
627 /* we need to call blk_put_request twice. */
628 blk_put_request(pc->rq);
629 blk_put_request(pc->rq);
630 kfree(pc);
631 drive->pc = NULL;
632
633 ret = SUCCESS;
634 }
635
636ide_unlock:
637 spin_unlock_irq(&hwgroup->lock);
638no_drive:
639 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
640 printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed");
641
642 return ret;
643}
644
645static int idescsi_eh_reset (struct scsi_cmnd *cmd)
646{
647 struct request *req;
648 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
649 ide_drive_t *drive = scsi->drive;
650 ide_hwgroup_t *hwgroup;
651 int ready = 0;
652 int ret = SUCCESS;
653
654 struct ide_atapi_pc *pc;
655
656 /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
657
658 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
659 printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number);
660
661 if (!drive) {
662 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n");
663 WARN_ON(1);
664 return FAILED;
665 }
666
667 hwgroup = drive->hwif->hwgroup;
668
669 spin_lock_irq(cmd->device->host->host_lock);
670 spin_lock(&hwgroup->lock);
671
672 pc = drive->pc;
673 if (pc)
674 req = pc->rq;
675
676 if (pc == NULL || req != hwgroup->rq || hwgroup->handler == NULL) {
677 printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n");
678 spin_unlock(&hwgroup->lock);
679 spin_unlock_irq(cmd->device->host->host_lock);
680 return FAILED;
681 }
682
683 /* kill current request */
684 if (__blk_end_request(req, -EIO, 0))
685 BUG();
686 if (blk_sense_request(req))
687 kfree(pc->buf);
688 kfree(pc);
689 drive->pc = NULL;
690 blk_put_request(req);
691
692 /* now nuke the drive queue */
693 while ((req = elv_next_request(drive->queue))) {
694 if (__blk_end_request(req, -EIO, 0))
695 BUG();
696 }
697
698 hwgroup->rq = NULL;
699 hwgroup->handler = NULL;
700 hwgroup->busy = 1; /* will set this to zero when ide reset finished */
701 spin_unlock(&hwgroup->lock);
702
703 ide_do_reset(drive);
704
705 /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
706
707 do {
708 spin_unlock_irq(cmd->device->host->host_lock);
709 msleep(50);
710 spin_lock_irq(cmd->device->host->host_lock);
711 } while ( HWGROUP(drive)->handler );
712
713 ready = drive_is_ready(drive);
714 HWGROUP(drive)->busy--;
715 if (!ready) {
716 printk (KERN_ERR "ide-scsi: reset failed!\n");
717 ret = FAILED;
718 }
719
720 spin_unlock_irq(cmd->device->host->host_lock);
721 return ret;
722}
723
724static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev,
725 sector_t capacity, int *parm)
726{
727 idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host);
728 ide_drive_t *drive = idescsi->drive;
729
730 if (drive->bios_cyl && drive->bios_head && drive->bios_sect) {
731 parm[0] = drive->bios_head;
732 parm[1] = drive->bios_sect;
733 parm[2] = drive->bios_cyl;
734 }
735 return 0;
736}
737
738static struct scsi_host_template idescsi_template = {
739 .module = THIS_MODULE,
740 .name = "idescsi",
741 .info = idescsi_info,
742 .slave_configure = idescsi_slave_configure,
743 .ioctl = idescsi_ioctl,
744 .queuecommand = idescsi_queue,
745 .eh_abort_handler = idescsi_eh_abort,
746 .eh_host_reset_handler = idescsi_eh_reset,
747 .bios_param = idescsi_bios,
748 .can_queue = 40,
749 .this_id = -1,
750 .sg_tablesize = 256,
751 .cmd_per_lun = 5,
752 .max_sectors = 128,
753 .use_clustering = DISABLE_CLUSTERING,
754 .emulated = 1,
755 .proc_name = "ide-scsi",
756};
757
758static int ide_scsi_probe(ide_drive_t *drive)
759{
760 idescsi_scsi_t *idescsi;
761 struct Scsi_Host *host;
762 struct gendisk *g;
763 static int warned;
764 int err = -ENOMEM;
765 u16 last_lun;
766
767 if (!warned && drive->media == ide_cdrom) {
768 printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
769 warned = 1;
770 }
771
772 if (idescsi_nocd && drive->media == ide_cdrom)
773 return -ENODEV;
774
775 if (!strstr("ide-scsi", drive->driver_req) ||
776 drive->media == ide_disk ||
777 !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t))))
778 return -ENODEV;
779
780 drive->dev_flags |= IDE_DFLAG_SCSI;
781
782 g = alloc_disk(1 << PARTN_BITS);
783 if (!g)
784 goto out_host_put;
785
786 ide_init_disk(g, drive);
787
788 host->max_id = 1;
789
790 last_lun = drive->id[ATA_ID_LAST_LUN];
791 if (last_lun)
792 debug_log("%s: last_lun=%u\n", drive->name, last_lun);
793
794 if ((last_lun & 7) != 7)
795 host->max_lun = (last_lun & 7) + 1;
796 else
797 host->max_lun = 1;
798
799 drive->driver_data = host;
800 idescsi = scsihost_to_idescsi(host);
801 idescsi->drive = drive;
802 idescsi->driver = &idescsi_driver;
803 idescsi->host = host;
804 idescsi->disk = g;
805 g->private_data = &idescsi->driver;
806 err = 0;
807 idescsi_setup(drive, idescsi);
808 g->fops = &idescsi_ops;
809 ide_register_region(g);
810 err = scsi_add_host(host, &drive->gendev);
811 if (!err) {
812 scsi_scan_host(host);
813 return 0;
814 }
815 /* fall through on error */
816 ide_unregister_region(g);
817 ide_proc_unregister_driver(drive, &idescsi_driver);
818
819 put_disk(g);
820out_host_put:
821 drive->dev_flags &= ~IDE_DFLAG_SCSI;
822 scsi_host_put(host);
823 return err;
824}
825
826static int __init init_idescsi_module(void)
827{
828 return driver_register(&idescsi_driver.gen_driver);
829}
830
831static void __exit exit_idescsi_module(void)
832{
833 driver_unregister(&idescsi_driver.gen_driver);
834}
835
836module_param(idescsi_nocd, int, 0600);
837MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd");
838module_init(init_idescsi_module);
839module_exit(exit_idescsi_module);
840MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-20 06:45:10 -0400