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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_pscsi.c | |
3 | * | |
4 | * This file contains the generic target mode <-> Linux SCSI subsystem plugin. | |
5 | * | |
6 | * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
c66ac9db NB |
29 | #include <linux/string.h> |
30 | #include <linux/parser.h> | |
31 | #include <linux/timer.h> | |
32 | #include <linux/blkdev.h> | |
33 | #include <linux/blk_types.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/spinlock.h> | |
c66ac9db NB |
36 | #include <linux/genhd.h> |
37 | #include <linux/cdrom.h> | |
d6e0175c | 38 | #include <linux/ratelimit.h> |
827509e3 | 39 | #include <linux/module.h> |
d6e0175c CH |
40 | #include <asm/unaligned.h> |
41 | ||
c66ac9db NB |
42 | #include <scsi/scsi.h> |
43 | #include <scsi/scsi_device.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
45 | #include <scsi/scsi_host.h> | |
e66ecd50 | 46 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
47 | |
48 | #include <target/target_core_base.h> | |
c4795fb2 | 49 | #include <target/target_core_backend.h> |
c66ac9db | 50 | |
d6e0175c | 51 | #include "target_core_alua.h" |
c66ac9db NB |
52 | #include "target_core_pscsi.h" |
53 | ||
54 | #define ISPRINT(a) ((a >= ' ') && (a <= '~')) | |
55 | ||
56 | static struct se_subsystem_api pscsi_template; | |
57 | ||
58 | static void pscsi_req_done(struct request *, int); | |
59 | ||
c66ac9db NB |
60 | /* pscsi_attach_hba(): |
61 | * | |
62 | * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. | |
63 | * from the passed SCSI Host ID. | |
64 | */ | |
65 | static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) | |
66 | { | |
c66ac9db NB |
67 | struct pscsi_hba_virt *phv; |
68 | ||
69 | phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); | |
6708bb27 AG |
70 | if (!phv) { |
71 | pr_err("Unable to allocate struct pscsi_hba_virt\n"); | |
e3d6f909 | 72 | return -ENOMEM; |
c66ac9db NB |
73 | } |
74 | phv->phv_host_id = host_id; | |
e6a8a41a | 75 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
c66ac9db | 76 | |
5951146d | 77 | hba->hba_ptr = phv; |
c66ac9db | 78 | |
6708bb27 | 79 | pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" |
c66ac9db NB |
80 | " Generic Target Core Stack %s\n", hba->hba_id, |
81 | PSCSI_VERSION, TARGET_CORE_MOD_VERSION); | |
6708bb27 | 82 | pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", |
e3d6f909 | 83 | hba->hba_id); |
c66ac9db NB |
84 | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static void pscsi_detach_hba(struct se_hba *hba) | |
89 | { | |
90 | struct pscsi_hba_virt *phv = hba->hba_ptr; | |
91 | struct Scsi_Host *scsi_host = phv->phv_lld_host; | |
92 | ||
93 | if (scsi_host) { | |
94 | scsi_host_put(scsi_host); | |
95 | ||
6708bb27 | 96 | pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" |
c66ac9db NB |
97 | " Generic Target Core\n", hba->hba_id, |
98 | (scsi_host->hostt->name) ? (scsi_host->hostt->name) : | |
99 | "Unknown"); | |
100 | } else | |
6708bb27 | 101 | pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" |
c66ac9db NB |
102 | " from Generic Target Core\n", hba->hba_id); |
103 | ||
104 | kfree(phv); | |
105 | hba->hba_ptr = NULL; | |
106 | } | |
107 | ||
108 | static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) | |
109 | { | |
8359cf43 | 110 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
c66ac9db | 111 | struct Scsi_Host *sh = phv->phv_lld_host; |
c66ac9db NB |
112 | /* |
113 | * Release the struct Scsi_Host | |
114 | */ | |
6708bb27 AG |
115 | if (!mode_flag) { |
116 | if (!sh) | |
c66ac9db NB |
117 | return 0; |
118 | ||
119 | phv->phv_lld_host = NULL; | |
e6a8a41a | 120 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
c66ac9db | 121 | |
6708bb27 | 122 | pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" |
c66ac9db NB |
123 | " %s\n", hba->hba_id, (sh->hostt->name) ? |
124 | (sh->hostt->name) : "Unknown"); | |
125 | ||
126 | scsi_host_put(sh); | |
127 | return 0; | |
128 | } | |
129 | /* | |
130 | * Otherwise, locate struct Scsi_Host from the original passed | |
131 | * pSCSI Host ID and enable for phba mode | |
132 | */ | |
e3d6f909 AG |
133 | sh = scsi_host_lookup(phv->phv_host_id); |
134 | if (IS_ERR(sh)) { | |
6708bb27 | 135 | pr_err("pSCSI: Unable to locate SCSI Host for" |
c66ac9db | 136 | " phv_host_id: %d\n", phv->phv_host_id); |
e3d6f909 | 137 | return PTR_ERR(sh); |
c66ac9db | 138 | } |
c66ac9db NB |
139 | |
140 | phv->phv_lld_host = sh; | |
141 | phv->phv_mode = PHV_LLD_SCSI_HOST_NO; | |
142 | ||
6708bb27 | 143 | pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", |
c66ac9db NB |
144 | hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); |
145 | ||
146 | return 1; | |
147 | } | |
148 | ||
149 | static void pscsi_tape_read_blocksize(struct se_device *dev, | |
150 | struct scsi_device *sdev) | |
151 | { | |
152 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
153 | int ret; | |
154 | ||
155 | buf = kzalloc(12, GFP_KERNEL); | |
156 | if (!buf) | |
157 | return; | |
158 | ||
159 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
160 | cdb[0] = MODE_SENSE; | |
161 | cdb[4] = 0x0c; /* 12 bytes */ | |
162 | ||
163 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, | |
164 | HZ, 1, NULL); | |
165 | if (ret) | |
166 | goto out_free; | |
167 | ||
168 | /* | |
169 | * If MODE_SENSE still returns zero, set the default value to 1024. | |
170 | */ | |
171 | sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); | |
172 | if (!sdev->sector_size) | |
173 | sdev->sector_size = 1024; | |
174 | out_free: | |
175 | kfree(buf); | |
176 | } | |
177 | ||
178 | static void | |
179 | pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) | |
180 | { | |
181 | unsigned char *buf; | |
182 | ||
183 | if (sdev->inquiry_len < INQUIRY_LEN) | |
184 | return; | |
185 | ||
186 | buf = sdev->inquiry; | |
187 | if (!buf) | |
188 | return; | |
189 | /* | |
190 | * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() | |
191 | */ | |
192 | memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); | |
193 | memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); | |
194 | memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); | |
195 | } | |
196 | ||
197 | static int | |
198 | pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) | |
199 | { | |
200 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
201 | int ret; | |
202 | ||
203 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
204 | if (!buf) | |
e3d6f909 | 205 | return -ENOMEM; |
c66ac9db NB |
206 | |
207 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
208 | cdb[0] = INQUIRY; | |
209 | cdb[1] = 0x01; /* Query VPD */ | |
210 | cdb[2] = 0x80; /* Unit Serial Number */ | |
211 | cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; | |
212 | cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); | |
213 | ||
214 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
215 | INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); | |
216 | if (ret) | |
217 | goto out_free; | |
218 | ||
219 | snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); | |
220 | ||
221 | wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL; | |
222 | ||
223 | kfree(buf); | |
224 | return 0; | |
225 | ||
226 | out_free: | |
227 | kfree(buf); | |
e3d6f909 | 228 | return -EPERM; |
c66ac9db NB |
229 | } |
230 | ||
231 | static void | |
232 | pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, | |
233 | struct t10_wwn *wwn) | |
234 | { | |
235 | unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; | |
236 | int ident_len, page_len, off = 4, ret; | |
237 | struct t10_vpd *vpd; | |
238 | ||
239 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
240 | if (!buf) | |
241 | return; | |
242 | ||
243 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
244 | cdb[0] = INQUIRY; | |
245 | cdb[1] = 0x01; /* Query VPD */ | |
246 | cdb[2] = 0x83; /* Device Identifier */ | |
247 | cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; | |
248 | cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); | |
249 | ||
250 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
251 | INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, | |
252 | NULL, HZ, 1, NULL); | |
253 | if (ret) | |
254 | goto out; | |
255 | ||
256 | page_len = (buf[2] << 8) | buf[3]; | |
257 | while (page_len > 0) { | |
258 | /* Grab a pointer to the Identification descriptor */ | |
259 | page_83 = &buf[off]; | |
260 | ident_len = page_83[3]; | |
261 | if (!ident_len) { | |
6708bb27 | 262 | pr_err("page_83[3]: identifier" |
c66ac9db NB |
263 | " length zero!\n"); |
264 | break; | |
265 | } | |
6708bb27 | 266 | pr_debug("T10 VPD Identifer Length: %d\n", ident_len); |
c66ac9db NB |
267 | |
268 | vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); | |
269 | if (!vpd) { | |
6708bb27 | 270 | pr_err("Unable to allocate memory for" |
c66ac9db NB |
271 | " struct t10_vpd\n"); |
272 | goto out; | |
273 | } | |
274 | INIT_LIST_HEAD(&vpd->vpd_list); | |
275 | ||
276 | transport_set_vpd_proto_id(vpd, page_83); | |
277 | transport_set_vpd_assoc(vpd, page_83); | |
278 | ||
279 | if (transport_set_vpd_ident_type(vpd, page_83) < 0) { | |
280 | off += (ident_len + 4); | |
281 | page_len -= (ident_len + 4); | |
282 | kfree(vpd); | |
283 | continue; | |
284 | } | |
285 | if (transport_set_vpd_ident(vpd, page_83) < 0) { | |
286 | off += (ident_len + 4); | |
287 | page_len -= (ident_len + 4); | |
288 | kfree(vpd); | |
289 | continue; | |
290 | } | |
291 | ||
292 | list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); | |
293 | off += (ident_len + 4); | |
294 | page_len -= (ident_len + 4); | |
295 | } | |
296 | ||
297 | out: | |
298 | kfree(buf); | |
299 | } | |
300 | ||
301 | /* pscsi_add_device_to_list(): | |
302 | * | |
303 | * | |
304 | */ | |
305 | static struct se_device *pscsi_add_device_to_list( | |
306 | struct se_hba *hba, | |
307 | struct se_subsystem_dev *se_dev, | |
308 | struct pscsi_dev_virt *pdv, | |
309 | struct scsi_device *sd, | |
310 | int dev_flags) | |
311 | { | |
312 | struct se_device *dev; | |
313 | struct se_dev_limits dev_limits; | |
314 | struct request_queue *q; | |
315 | struct queue_limits *limits; | |
316 | ||
317 | memset(&dev_limits, 0, sizeof(struct se_dev_limits)); | |
318 | ||
319 | if (!sd->queue_depth) { | |
320 | sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; | |
321 | ||
6708bb27 | 322 | pr_err("Set broken SCSI Device %d:%d:%d" |
c66ac9db NB |
323 | " queue_depth to %d\n", sd->channel, sd->id, |
324 | sd->lun, sd->queue_depth); | |
325 | } | |
326 | /* | |
327 | * Setup the local scope queue_limits from struct request_queue->limits | |
328 | * to pass into transport_add_device_to_core_hba() as struct se_dev_limits. | |
329 | */ | |
330 | q = sd->request_queue; | |
331 | limits = &dev_limits.limits; | |
332 | limits->logical_block_size = sd->sector_size; | |
a1d8b49a AG |
333 | limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); |
334 | limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q)); | |
c66ac9db NB |
335 | dev_limits.hw_queue_depth = sd->queue_depth; |
336 | dev_limits.queue_depth = sd->queue_depth; | |
337 | /* | |
338 | * Setup our standard INQUIRY info into se_dev->t10_wwn | |
339 | */ | |
340 | pscsi_set_inquiry_info(sd, &se_dev->t10_wwn); | |
341 | ||
342 | /* | |
343 | * Set the pointer pdv->pdv_sd to from passed struct scsi_device, | |
344 | * which has already been referenced with Linux SCSI code with | |
345 | * scsi_device_get() in this file's pscsi_create_virtdevice(). | |
346 | * | |
347 | * The passthrough operations called by the transport_add_device_* | |
348 | * function below will require this pointer to be set for passthroug | |
349 | * ops. | |
350 | * | |
351 | * For the shutdown case in pscsi_free_device(), this struct | |
352 | * scsi_device reference is released with Linux SCSI code | |
353 | * scsi_device_put() and the pdv->pdv_sd cleared. | |
354 | */ | |
355 | pdv->pdv_sd = sd; | |
c66ac9db | 356 | dev = transport_add_device_to_core_hba(hba, &pscsi_template, |
5951146d | 357 | se_dev, dev_flags, pdv, |
c66ac9db | 358 | &dev_limits, NULL, NULL); |
6708bb27 | 359 | if (!dev) { |
c66ac9db NB |
360 | pdv->pdv_sd = NULL; |
361 | return NULL; | |
362 | } | |
363 | ||
364 | /* | |
365 | * Locate VPD WWN Information used for various purposes within | |
366 | * the Storage Engine. | |
367 | */ | |
368 | if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) { | |
369 | /* | |
370 | * If VPD Unit Serial returned GOOD status, try | |
371 | * VPD Device Identification page (0x83). | |
372 | */ | |
373 | pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn); | |
374 | } | |
375 | ||
376 | /* | |
377 | * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. | |
378 | */ | |
379 | if (sd->type == TYPE_TAPE) | |
380 | pscsi_tape_read_blocksize(dev, sd); | |
381 | return dev; | |
382 | } | |
383 | ||
384 | static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name) | |
385 | { | |
386 | struct pscsi_dev_virt *pdv; | |
387 | ||
388 | pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); | |
6708bb27 AG |
389 | if (!pdv) { |
390 | pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); | |
c66ac9db NB |
391 | return NULL; |
392 | } | |
393 | pdv->pdv_se_hba = hba; | |
394 | ||
6708bb27 | 395 | pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); |
5951146d | 396 | return pdv; |
c66ac9db NB |
397 | } |
398 | ||
399 | /* | |
400 | * Called with struct Scsi_Host->host_lock called. | |
401 | */ | |
402 | static struct se_device *pscsi_create_type_disk( | |
403 | struct scsi_device *sd, | |
404 | struct pscsi_dev_virt *pdv, | |
405 | struct se_subsystem_dev *se_dev, | |
406 | struct se_hba *hba) | |
5dd7ed2e | 407 | __releases(sh->host_lock) |
c66ac9db NB |
408 | { |
409 | struct se_device *dev; | |
8359cf43 | 410 | struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; |
c66ac9db NB |
411 | struct Scsi_Host *sh = sd->host; |
412 | struct block_device *bd; | |
413 | u32 dev_flags = 0; | |
414 | ||
415 | if (scsi_device_get(sd)) { | |
6708bb27 | 416 | pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", |
c66ac9db NB |
417 | sh->host_no, sd->channel, sd->id, sd->lun); |
418 | spin_unlock_irq(sh->host_lock); | |
419 | return NULL; | |
420 | } | |
421 | spin_unlock_irq(sh->host_lock); | |
422 | /* | |
423 | * Claim exclusive struct block_device access to struct scsi_device | |
424 | * for TYPE_DISK using supplied udev_path | |
425 | */ | |
426 | bd = blkdev_get_by_path(se_dev->se_dev_udev_path, | |
427 | FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); | |
3ae279d2 | 428 | if (IS_ERR(bd)) { |
6708bb27 | 429 | pr_err("pSCSI: blkdev_get_by_path() failed\n"); |
c66ac9db NB |
430 | scsi_device_put(sd); |
431 | return NULL; | |
432 | } | |
433 | pdv->pdv_bd = bd; | |
434 | ||
435 | dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); | |
6708bb27 | 436 | if (!dev) { |
c66ac9db NB |
437 | blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
438 | scsi_device_put(sd); | |
439 | return NULL; | |
440 | } | |
6708bb27 | 441 | pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", |
c66ac9db NB |
442 | phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); |
443 | ||
444 | return dev; | |
445 | } | |
446 | ||
447 | /* | |
448 | * Called with struct Scsi_Host->host_lock called. | |
449 | */ | |
450 | static struct se_device *pscsi_create_type_rom( | |
451 | struct scsi_device *sd, | |
452 | struct pscsi_dev_virt *pdv, | |
453 | struct se_subsystem_dev *se_dev, | |
454 | struct se_hba *hba) | |
5dd7ed2e | 455 | __releases(sh->host_lock) |
c66ac9db NB |
456 | { |
457 | struct se_device *dev; | |
8359cf43 | 458 | struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; |
c66ac9db NB |
459 | struct Scsi_Host *sh = sd->host; |
460 | u32 dev_flags = 0; | |
461 | ||
462 | if (scsi_device_get(sd)) { | |
6708bb27 | 463 | pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", |
c66ac9db NB |
464 | sh->host_no, sd->channel, sd->id, sd->lun); |
465 | spin_unlock_irq(sh->host_lock); | |
466 | return NULL; | |
467 | } | |
468 | spin_unlock_irq(sh->host_lock); | |
469 | ||
470 | dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); | |
6708bb27 | 471 | if (!dev) { |
c66ac9db NB |
472 | scsi_device_put(sd); |
473 | return NULL; | |
474 | } | |
6708bb27 | 475 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", |
c66ac9db NB |
476 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
477 | sd->channel, sd->id, sd->lun); | |
478 | ||
479 | return dev; | |
480 | } | |
481 | ||
482 | /* | |
483 | *Called with struct Scsi_Host->host_lock called. | |
484 | */ | |
485 | static struct se_device *pscsi_create_type_other( | |
486 | struct scsi_device *sd, | |
487 | struct pscsi_dev_virt *pdv, | |
488 | struct se_subsystem_dev *se_dev, | |
489 | struct se_hba *hba) | |
5dd7ed2e | 490 | __releases(sh->host_lock) |
c66ac9db NB |
491 | { |
492 | struct se_device *dev; | |
8359cf43 | 493 | struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; |
c66ac9db NB |
494 | struct Scsi_Host *sh = sd->host; |
495 | u32 dev_flags = 0; | |
496 | ||
497 | spin_unlock_irq(sh->host_lock); | |
498 | dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags); | |
6708bb27 | 499 | if (!dev) |
c66ac9db NB |
500 | return NULL; |
501 | ||
6708bb27 | 502 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", |
c66ac9db NB |
503 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
504 | sd->channel, sd->id, sd->lun); | |
505 | ||
506 | return dev; | |
507 | } | |
508 | ||
509 | static struct se_device *pscsi_create_virtdevice( | |
510 | struct se_hba *hba, | |
511 | struct se_subsystem_dev *se_dev, | |
512 | void *p) | |
513 | { | |
8359cf43 | 514 | struct pscsi_dev_virt *pdv = p; |
c66ac9db NB |
515 | struct se_device *dev; |
516 | struct scsi_device *sd; | |
8359cf43 | 517 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
c66ac9db NB |
518 | struct Scsi_Host *sh = phv->phv_lld_host; |
519 | int legacy_mode_enable = 0; | |
520 | ||
6708bb27 AG |
521 | if (!pdv) { |
522 | pr_err("Unable to locate struct pscsi_dev_virt" | |
c66ac9db | 523 | " parameter\n"); |
613640e4 | 524 | return ERR_PTR(-EINVAL); |
c66ac9db NB |
525 | } |
526 | /* | |
527 | * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the | |
528 | * struct Scsi_Host we will need to bring the TCM/pSCSI object online | |
529 | */ | |
6708bb27 | 530 | if (!sh) { |
c66ac9db | 531 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
6708bb27 | 532 | pr_err("pSCSI: Unable to locate struct" |
c66ac9db | 533 | " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); |
613640e4 | 534 | return ERR_PTR(-ENODEV); |
c66ac9db NB |
535 | } |
536 | /* | |
e6a8a41a | 537 | * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device |
c66ac9db NB |
538 | * reference, we enforce that udev_path has been set |
539 | */ | |
540 | if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) { | |
6708bb27 | 541 | pr_err("pSCSI: udev_path attribute has not" |
c66ac9db | 542 | " been set before ENABLE=1\n"); |
613640e4 | 543 | return ERR_PTR(-EINVAL); |
c66ac9db NB |
544 | } |
545 | /* | |
e6a8a41a | 546 | * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, |
c66ac9db NB |
547 | * use the original TCM hba ID to reference Linux/SCSI Host No |
548 | * and enable for PHV_LLD_SCSI_HOST_NO mode. | |
549 | */ | |
550 | if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { | |
551 | spin_lock(&hba->device_lock); | |
6708bb27 AG |
552 | if (!list_empty(&hba->hba_dev_list)) { |
553 | pr_err("pSCSI: Unable to set hba_mode" | |
c66ac9db NB |
554 | " with active devices\n"); |
555 | spin_unlock(&hba->device_lock); | |
613640e4 | 556 | return ERR_PTR(-EEXIST); |
c66ac9db NB |
557 | } |
558 | spin_unlock(&hba->device_lock); | |
559 | ||
560 | if (pscsi_pmode_enable_hba(hba, 1) != 1) | |
613640e4 | 561 | return ERR_PTR(-ENODEV); |
c66ac9db NB |
562 | |
563 | legacy_mode_enable = 1; | |
564 | hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; | |
565 | sh = phv->phv_lld_host; | |
566 | } else { | |
e3d6f909 AG |
567 | sh = scsi_host_lookup(pdv->pdv_host_id); |
568 | if (IS_ERR(sh)) { | |
6708bb27 | 569 | pr_err("pSCSI: Unable to locate" |
c66ac9db | 570 | " pdv_host_id: %d\n", pdv->pdv_host_id); |
942d8264 | 571 | return ERR_CAST(sh); |
c66ac9db NB |
572 | } |
573 | } | |
574 | } else { | |
e6a8a41a SH |
575 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { |
576 | pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" | |
c66ac9db | 577 | " struct Scsi_Host exists\n"); |
613640e4 | 578 | return ERR_PTR(-EEXIST); |
c66ac9db NB |
579 | } |
580 | } | |
581 | ||
582 | spin_lock_irq(sh->host_lock); | |
583 | list_for_each_entry(sd, &sh->__devices, siblings) { | |
584 | if ((pdv->pdv_channel_id != sd->channel) || | |
585 | (pdv->pdv_target_id != sd->id) || | |
586 | (pdv->pdv_lun_id != sd->lun)) | |
587 | continue; | |
588 | /* | |
589 | * Functions will release the held struct scsi_host->host_lock | |
590 | * before calling calling pscsi_add_device_to_list() to register | |
591 | * struct scsi_device with target_core_mod. | |
592 | */ | |
593 | switch (sd->type) { | |
594 | case TYPE_DISK: | |
595 | dev = pscsi_create_type_disk(sd, pdv, se_dev, hba); | |
596 | break; | |
597 | case TYPE_ROM: | |
598 | dev = pscsi_create_type_rom(sd, pdv, se_dev, hba); | |
599 | break; | |
600 | default: | |
601 | dev = pscsi_create_type_other(sd, pdv, se_dev, hba); | |
602 | break; | |
603 | } | |
604 | ||
6708bb27 | 605 | if (!dev) { |
e6a8a41a | 606 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
607 | scsi_host_put(sh); |
608 | else if (legacy_mode_enable) { | |
609 | pscsi_pmode_enable_hba(hba, 0); | |
610 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
611 | } | |
612 | pdv->pdv_sd = NULL; | |
613640e4 | 613 | return ERR_PTR(-ENODEV); |
c66ac9db NB |
614 | } |
615 | return dev; | |
616 | } | |
617 | spin_unlock_irq(sh->host_lock); | |
618 | ||
6708bb27 | 619 | pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, |
c66ac9db NB |
620 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); |
621 | ||
e6a8a41a | 622 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
623 | scsi_host_put(sh); |
624 | else if (legacy_mode_enable) { | |
625 | pscsi_pmode_enable_hba(hba, 0); | |
626 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
627 | } | |
628 | ||
613640e4 | 629 | return ERR_PTR(-ENODEV); |
c66ac9db NB |
630 | } |
631 | ||
632 | /* pscsi_free_device(): (Part of se_subsystem_api_t template) | |
633 | * | |
634 | * | |
635 | */ | |
636 | static void pscsi_free_device(void *p) | |
637 | { | |
638 | struct pscsi_dev_virt *pdv = p; | |
639 | struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr; | |
640 | struct scsi_device *sd = pdv->pdv_sd; | |
641 | ||
642 | if (sd) { | |
643 | /* | |
644 | * Release exclusive pSCSI internal struct block_device claim for | |
645 | * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() | |
646 | */ | |
647 | if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { | |
648 | blkdev_put(pdv->pdv_bd, | |
649 | FMODE_WRITE|FMODE_READ|FMODE_EXCL); | |
650 | pdv->pdv_bd = NULL; | |
651 | } | |
652 | /* | |
653 | * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference | |
654 | * to struct Scsi_Host now. | |
655 | */ | |
656 | if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && | |
657 | (phv->phv_lld_host != NULL)) | |
658 | scsi_host_put(phv->phv_lld_host); | |
659 | ||
660 | if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) | |
661 | scsi_device_put(sd); | |
662 | ||
663 | pdv->pdv_sd = NULL; | |
664 | } | |
665 | ||
666 | kfree(pdv); | |
667 | } | |
668 | ||
5787cacd | 669 | static int pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg) |
c66ac9db | 670 | { |
5787cacd | 671 | struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; |
c66ac9db NB |
672 | struct scsi_device *sd = pdv->pdv_sd; |
673 | int result; | |
5787cacd | 674 | struct pscsi_plugin_task *pt = cmd->priv; |
c66ac9db NB |
675 | unsigned char *cdb = &pt->pscsi_cdb[0]; |
676 | ||
677 | result = pt->pscsi_result; | |
678 | /* | |
679 | * Hack to make sure that Write-Protect modepage is set if R/O mode is | |
680 | * forced. | |
681 | */ | |
682 | if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && | |
683 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
5787cacd | 684 | if (!cmd->se_deve) |
c66ac9db NB |
685 | goto after_mode_sense; |
686 | ||
5787cacd CH |
687 | if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { |
688 | unsigned char *buf = transport_kmap_data_sg(cmd); | |
c66ac9db NB |
689 | |
690 | if (cdb[0] == MODE_SENSE_10) { | |
691 | if (!(buf[3] & 0x80)) | |
692 | buf[3] |= 0x80; | |
693 | } else { | |
694 | if (!(buf[2] & 0x80)) | |
695 | buf[2] |= 0x80; | |
696 | } | |
05d1c7c0 | 697 | |
5787cacd | 698 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
699 | } |
700 | } | |
701 | after_mode_sense: | |
702 | ||
703 | if (sd->type != TYPE_TAPE) | |
704 | goto after_mode_select; | |
705 | ||
706 | /* | |
707 | * Hack to correctly obtain the initiator requested blocksize for | |
708 | * TYPE_TAPE. Since this value is dependent upon each tape media, | |
709 | * struct scsi_device->sector_size will not contain the correct value | |
710 | * by default, so we go ahead and set it so | |
711 | * TRANSPORT(dev)->get_blockdev() returns the correct value to the | |
712 | * storage engine. | |
713 | */ | |
714 | if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && | |
715 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
716 | unsigned char *buf; | |
c66ac9db NB |
717 | u16 bdl; |
718 | u32 blocksize; | |
719 | ||
720 | buf = sg_virt(&sg[0]); | |
6708bb27 AG |
721 | if (!buf) { |
722 | pr_err("Unable to get buf for scatterlist\n"); | |
c66ac9db NB |
723 | goto after_mode_select; |
724 | } | |
725 | ||
726 | if (cdb[0] == MODE_SELECT) | |
727 | bdl = (buf[3]); | |
728 | else | |
729 | bdl = (buf[6] << 8) | (buf[7]); | |
730 | ||
731 | if (!bdl) | |
732 | goto after_mode_select; | |
733 | ||
734 | if (cdb[0] == MODE_SELECT) | |
735 | blocksize = (buf[9] << 16) | (buf[10] << 8) | | |
736 | (buf[11]); | |
737 | else | |
738 | blocksize = (buf[13] << 16) | (buf[14] << 8) | | |
739 | (buf[15]); | |
740 | ||
741 | sd->sector_size = blocksize; | |
742 | } | |
743 | after_mode_select: | |
744 | ||
745 | if (status_byte(result) & CHECK_CONDITION) | |
746 | return 1; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
c66ac9db NB |
751 | enum { |
752 | Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, | |
753 | Opt_scsi_lun_id, Opt_err | |
754 | }; | |
755 | ||
756 | static match_table_t tokens = { | |
757 | {Opt_scsi_host_id, "scsi_host_id=%d"}, | |
758 | {Opt_scsi_channel_id, "scsi_channel_id=%d"}, | |
759 | {Opt_scsi_target_id, "scsi_target_id=%d"}, | |
760 | {Opt_scsi_lun_id, "scsi_lun_id=%d"}, | |
761 | {Opt_err, NULL} | |
762 | }; | |
763 | ||
764 | static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba, | |
765 | struct se_subsystem_dev *se_dev, | |
766 | const char *page, | |
767 | ssize_t count) | |
768 | { | |
769 | struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; | |
770 | struct pscsi_hba_virt *phv = hba->hba_ptr; | |
771 | char *orig, *ptr, *opts; | |
772 | substring_t args[MAX_OPT_ARGS]; | |
773 | int ret = 0, arg, token; | |
774 | ||
775 | opts = kstrdup(page, GFP_KERNEL); | |
776 | if (!opts) | |
777 | return -ENOMEM; | |
778 | ||
779 | orig = opts; | |
780 | ||
90c161b6 | 781 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
782 | if (!*ptr) |
783 | continue; | |
784 | ||
785 | token = match_token(ptr, tokens, args); | |
786 | switch (token) { | |
787 | case Opt_scsi_host_id: | |
788 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { | |
6708bb27 | 789 | pr_err("PSCSI[%d]: Unable to accept" |
c66ac9db NB |
790 | " scsi_host_id while phv_mode ==" |
791 | " PHV_LLD_SCSI_HOST_NO\n", | |
792 | phv->phv_host_id); | |
793 | ret = -EINVAL; | |
794 | goto out; | |
795 | } | |
796 | match_int(args, &arg); | |
797 | pdv->pdv_host_id = arg; | |
6708bb27 | 798 | pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" |
c66ac9db NB |
799 | " %d\n", phv->phv_host_id, pdv->pdv_host_id); |
800 | pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; | |
801 | break; | |
802 | case Opt_scsi_channel_id: | |
803 | match_int(args, &arg); | |
804 | pdv->pdv_channel_id = arg; | |
6708bb27 | 805 | pr_debug("PSCSI[%d]: Referencing SCSI Channel" |
c66ac9db NB |
806 | " ID: %d\n", phv->phv_host_id, |
807 | pdv->pdv_channel_id); | |
808 | pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; | |
809 | break; | |
810 | case Opt_scsi_target_id: | |
811 | match_int(args, &arg); | |
812 | pdv->pdv_target_id = arg; | |
6708bb27 | 813 | pr_debug("PSCSI[%d]: Referencing SCSI Target" |
c66ac9db NB |
814 | " ID: %d\n", phv->phv_host_id, |
815 | pdv->pdv_target_id); | |
816 | pdv->pdv_flags |= PDF_HAS_TARGET_ID; | |
817 | break; | |
818 | case Opt_scsi_lun_id: | |
819 | match_int(args, &arg); | |
820 | pdv->pdv_lun_id = arg; | |
6708bb27 | 821 | pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" |
c66ac9db NB |
822 | " %d\n", phv->phv_host_id, pdv->pdv_lun_id); |
823 | pdv->pdv_flags |= PDF_HAS_LUN_ID; | |
824 | break; | |
825 | default: | |
826 | break; | |
827 | } | |
828 | } | |
829 | ||
830 | out: | |
831 | kfree(orig); | |
832 | return (!ret) ? count : ret; | |
833 | } | |
834 | ||
835 | static ssize_t pscsi_check_configfs_dev_params( | |
836 | struct se_hba *hba, | |
837 | struct se_subsystem_dev *se_dev) | |
838 | { | |
839 | struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; | |
840 | ||
841 | if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || | |
842 | !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || | |
843 | !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { | |
6708bb27 | 844 | pr_err("Missing scsi_channel_id=, scsi_target_id= and" |
c66ac9db | 845 | " scsi_lun_id= parameters\n"); |
e3d6f909 | 846 | return -EINVAL; |
c66ac9db NB |
847 | } |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba, | |
853 | struct se_subsystem_dev *se_dev, | |
854 | char *b) | |
855 | { | |
856 | struct pscsi_hba_virt *phv = hba->hba_ptr; | |
857 | struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr; | |
858 | struct scsi_device *sd = pdv->pdv_sd; | |
859 | unsigned char host_id[16]; | |
860 | ssize_t bl; | |
861 | int i; | |
862 | ||
e6a8a41a | 863 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
864 | snprintf(host_id, 16, "%d", pdv->pdv_host_id); |
865 | else | |
866 | snprintf(host_id, 16, "PHBA Mode"); | |
867 | ||
868 | bl = sprintf(b, "SCSI Device Bus Location:" | |
869 | " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", | |
870 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, | |
871 | host_id); | |
872 | ||
873 | if (sd) { | |
874 | bl += sprintf(b + bl, " "); | |
875 | bl += sprintf(b + bl, "Vendor: "); | |
876 | for (i = 0; i < 8; i++) { | |
877 | if (ISPRINT(sd->vendor[i])) /* printable character? */ | |
878 | bl += sprintf(b + bl, "%c", sd->vendor[i]); | |
879 | else | |
880 | bl += sprintf(b + bl, " "); | |
881 | } | |
882 | bl += sprintf(b + bl, " Model: "); | |
883 | for (i = 0; i < 16; i++) { | |
884 | if (ISPRINT(sd->model[i])) /* printable character ? */ | |
885 | bl += sprintf(b + bl, "%c", sd->model[i]); | |
886 | else | |
887 | bl += sprintf(b + bl, " "); | |
888 | } | |
889 | bl += sprintf(b + bl, " Rev: "); | |
890 | for (i = 0; i < 4; i++) { | |
891 | if (ISPRINT(sd->rev[i])) /* printable character ? */ | |
892 | bl += sprintf(b + bl, "%c", sd->rev[i]); | |
893 | else | |
894 | bl += sprintf(b + bl, " "); | |
895 | } | |
896 | bl += sprintf(b + bl, "\n"); | |
897 | } | |
898 | return bl; | |
899 | } | |
900 | ||
901 | static void pscsi_bi_endio(struct bio *bio, int error) | |
902 | { | |
903 | bio_put(bio); | |
904 | } | |
905 | ||
a1d8b49a | 906 | static inline struct bio *pscsi_get_bio(int sg_num) |
c66ac9db NB |
907 | { |
908 | struct bio *bio; | |
909 | /* | |
910 | * Use bio_malloc() following the comment in for bio -> struct request | |
911 | * in block/blk-core.c:blk_make_request() | |
912 | */ | |
913 | bio = bio_kmalloc(GFP_KERNEL, sg_num); | |
6708bb27 AG |
914 | if (!bio) { |
915 | pr_err("PSCSI: bio_kmalloc() failed\n"); | |
c66ac9db NB |
916 | return NULL; |
917 | } | |
918 | bio->bi_end_io = pscsi_bi_endio; | |
919 | ||
920 | return bio; | |
921 | } | |
922 | ||
5787cacd CH |
923 | static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, |
924 | u32 sgl_nents, enum dma_data_direction data_direction, | |
02b1a746 | 925 | struct bio **hbio) |
c66ac9db | 926 | { |
5787cacd | 927 | struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; |
02b1a746 | 928 | struct bio *bio = NULL, *tbio = NULL; |
c66ac9db NB |
929 | struct page *page; |
930 | struct scatterlist *sg; | |
7a83aa4e | 931 | u32 data_len = cmd->data_length, i, len, bytes, off; |
5787cacd | 932 | int nr_pages = (cmd->data_length + sgl[0].offset + |
c66ac9db | 933 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
03e98c9e | 934 | int nr_vecs = 0, rc; |
5787cacd | 935 | int rw = (data_direction == DMA_TO_DEVICE); |
c66ac9db | 936 | |
02b1a746 CH |
937 | *hbio = NULL; |
938 | ||
6708bb27 | 939 | pr_debug("PSCSI: nr_pages: %d\n", nr_pages); |
c66ac9db | 940 | |
5787cacd | 941 | for_each_sg(sgl, sg, sgl_nents, i) { |
c66ac9db NB |
942 | page = sg_page(sg); |
943 | off = sg->offset; | |
944 | len = sg->length; | |
945 | ||
6708bb27 | 946 | pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, |
c66ac9db NB |
947 | page, len, off); |
948 | ||
949 | while (len > 0 && data_len > 0) { | |
950 | bytes = min_t(unsigned int, len, PAGE_SIZE - off); | |
951 | bytes = min(bytes, data_len); | |
952 | ||
6708bb27 | 953 | if (!bio) { |
c66ac9db NB |
954 | nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); |
955 | nr_pages -= nr_vecs; | |
956 | /* | |
957 | * Calls bio_kmalloc() and sets bio->bi_end_io() | |
958 | */ | |
a1d8b49a | 959 | bio = pscsi_get_bio(nr_vecs); |
6708bb27 | 960 | if (!bio) |
c66ac9db NB |
961 | goto fail; |
962 | ||
963 | if (rw) | |
964 | bio->bi_rw |= REQ_WRITE; | |
965 | ||
6708bb27 | 966 | pr_debug("PSCSI: Allocated bio: %p," |
c66ac9db NB |
967 | " dir: %s nr_vecs: %d\n", bio, |
968 | (rw) ? "rw" : "r", nr_vecs); | |
969 | /* | |
970 | * Set *hbio pointer to handle the case: | |
971 | * nr_pages > BIO_MAX_PAGES, where additional | |
972 | * bios need to be added to complete a given | |
5787cacd | 973 | * command. |
c66ac9db | 974 | */ |
02b1a746 CH |
975 | if (!*hbio) |
976 | *hbio = tbio = bio; | |
c66ac9db NB |
977 | else |
978 | tbio = tbio->bi_next = bio; | |
979 | } | |
980 | ||
6708bb27 | 981 | pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" |
c66ac9db NB |
982 | " bio: %p page: %p len: %d off: %d\n", i, bio, |
983 | page, len, off); | |
984 | ||
985 | rc = bio_add_pc_page(pdv->pdv_sd->request_queue, | |
986 | bio, page, bytes, off); | |
987 | if (rc != bytes) | |
988 | goto fail; | |
989 | ||
6708bb27 | 990 | pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", |
c66ac9db NB |
991 | bio->bi_vcnt, nr_vecs); |
992 | ||
993 | if (bio->bi_vcnt > nr_vecs) { | |
6708bb27 | 994 | pr_debug("PSCSI: Reached bio->bi_vcnt max:" |
c66ac9db NB |
995 | " %d i: %d bio: %p, allocating another" |
996 | " bio\n", bio->bi_vcnt, i, bio); | |
997 | /* | |
998 | * Clear the pointer so that another bio will | |
999 | * be allocated with pscsi_get_bio() above, the | |
1000 | * current bio has already been set *tbio and | |
1001 | * bio->bi_next. | |
1002 | */ | |
1003 | bio = NULL; | |
1004 | } | |
1005 | ||
1006 | page++; | |
1007 | len -= bytes; | |
1008 | data_len -= bytes; | |
1009 | off = 0; | |
1010 | } | |
1011 | } | |
c66ac9db | 1012 | |
5787cacd | 1013 | return sgl_nents; |
c66ac9db | 1014 | fail: |
02b1a746 CH |
1015 | while (*hbio) { |
1016 | bio = *hbio; | |
1017 | *hbio = (*hbio)->bi_next; | |
c66ac9db | 1018 | bio->bi_next = NULL; |
02b1a746 | 1019 | bio_endio(bio, 0); /* XXX: should be error */ |
c66ac9db | 1020 | } |
03e98c9e NB |
1021 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1022 | return -ENOMEM; | |
c66ac9db NB |
1023 | } |
1024 | ||
d6e0175c CH |
1025 | static inline u32 pscsi_get_sectors_6( |
1026 | unsigned char *cdb, | |
1027 | struct se_cmd *cmd, | |
1028 | int *ret) | |
1029 | { | |
1030 | struct se_device *dev = cmd->se_dev; | |
1031 | ||
1032 | /* | |
1033 | * Assume TYPE_DISK for non struct se_device objects. | |
1034 | * Use 8-bit sector value. | |
1035 | */ | |
1036 | if (!dev) | |
1037 | goto type_disk; | |
1038 | ||
1039 | /* | |
1040 | * Use 24-bit allocation length for TYPE_TAPE. | |
1041 | */ | |
1042 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) | |
1043 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; | |
1044 | ||
1045 | /* | |
1046 | * Everything else assume TYPE_DISK Sector CDB location. | |
1047 | * Use 8-bit sector value. SBC-3 says: | |
1048 | * | |
1049 | * A TRANSFER LENGTH field set to zero specifies that 256 | |
1050 | * logical blocks shall be written. Any other value | |
1051 | * specifies the number of logical blocks that shall be | |
1052 | * written. | |
1053 | */ | |
1054 | type_disk: | |
1055 | return cdb[4] ? : 256; | |
1056 | } | |
1057 | ||
1058 | static inline u32 pscsi_get_sectors_10( | |
1059 | unsigned char *cdb, | |
1060 | struct se_cmd *cmd, | |
1061 | int *ret) | |
1062 | { | |
1063 | struct se_device *dev = cmd->se_dev; | |
1064 | ||
1065 | /* | |
1066 | * Assume TYPE_DISK for non struct se_device objects. | |
1067 | * Use 16-bit sector value. | |
1068 | */ | |
1069 | if (!dev) | |
1070 | goto type_disk; | |
1071 | ||
1072 | /* | |
1073 | * XXX_10 is not defined in SSC, throw an exception | |
1074 | */ | |
1075 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { | |
1076 | *ret = -EINVAL; | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * Everything else assume TYPE_DISK Sector CDB location. | |
1082 | * Use 16-bit sector value. | |
1083 | */ | |
1084 | type_disk: | |
1085 | return (u32)(cdb[7] << 8) + cdb[8]; | |
1086 | } | |
1087 | ||
1088 | static inline u32 pscsi_get_sectors_12( | |
1089 | unsigned char *cdb, | |
1090 | struct se_cmd *cmd, | |
1091 | int *ret) | |
1092 | { | |
1093 | struct se_device *dev = cmd->se_dev; | |
1094 | ||
1095 | /* | |
1096 | * Assume TYPE_DISK for non struct se_device objects. | |
1097 | * Use 32-bit sector value. | |
1098 | */ | |
1099 | if (!dev) | |
1100 | goto type_disk; | |
1101 | ||
1102 | /* | |
1103 | * XXX_12 is not defined in SSC, throw an exception | |
1104 | */ | |
1105 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { | |
1106 | *ret = -EINVAL; | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Everything else assume TYPE_DISK Sector CDB location. | |
1112 | * Use 32-bit sector value. | |
1113 | */ | |
1114 | type_disk: | |
1115 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
1116 | } | |
1117 | ||
1118 | static inline u32 pscsi_get_sectors_16( | |
1119 | unsigned char *cdb, | |
1120 | struct se_cmd *cmd, | |
1121 | int *ret) | |
1122 | { | |
1123 | struct se_device *dev = cmd->se_dev; | |
1124 | ||
1125 | /* | |
1126 | * Assume TYPE_DISK for non struct se_device objects. | |
1127 | * Use 32-bit sector value. | |
1128 | */ | |
1129 | if (!dev) | |
1130 | goto type_disk; | |
1131 | ||
1132 | /* | |
1133 | * Use 24-bit allocation length for TYPE_TAPE. | |
1134 | */ | |
1135 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) | |
1136 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; | |
1137 | ||
1138 | type_disk: | |
1139 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
1140 | (cdb[12] << 8) + cdb[13]; | |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
1145 | */ | |
1146 | static inline u32 pscsi_get_sectors_32( | |
1147 | unsigned char *cdb, | |
1148 | struct se_cmd *cmd, | |
1149 | int *ret) | |
1150 | { | |
1151 | /* | |
1152 | * Assume TYPE_DISK for non struct se_device objects. | |
1153 | * Use 32-bit sector value. | |
1154 | */ | |
1155 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
1156 | (cdb[30] << 8) + cdb[31]; | |
1157 | ||
1158 | } | |
1159 | ||
1160 | static inline u32 pscsi_get_lba_21(unsigned char *cdb) | |
1161 | { | |
1162 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
1163 | } | |
1164 | ||
1165 | static inline u32 pscsi_get_lba_32(unsigned char *cdb) | |
1166 | { | |
1167 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
1168 | } | |
1169 | ||
1170 | static inline unsigned long long pscsi_get_lba_64(unsigned char *cdb) | |
1171 | { | |
1172 | unsigned int __v1, __v2; | |
1173 | ||
1174 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
1175 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1176 | ||
1177 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
1182 | */ | |
1183 | static inline unsigned long long pscsi_get_lba_64_ext(unsigned char *cdb) | |
1184 | { | |
1185 | unsigned int __v1, __v2; | |
1186 | ||
1187 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
1188 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
1189 | ||
1190 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
1191 | } | |
1192 | ||
1193 | ||
1194 | static inline u32 pscsi_get_size( | |
1195 | u32 sectors, | |
1196 | unsigned char *cdb, | |
1197 | struct se_cmd *cmd) | |
1198 | { | |
1199 | struct se_device *dev = cmd->se_dev; | |
1200 | ||
1201 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { | |
1202 | if (cdb[1] & 1) { /* sectors */ | |
1203 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; | |
1204 | } else /* bytes */ | |
1205 | return sectors; | |
1206 | } | |
1207 | ||
1208 | pr_debug("Returning block_size: %u, sectors: %u == %u for" | |
1209 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, | |
1210 | sectors, dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
1211 | dev->transport->name); | |
1212 | ||
1213 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; | |
1214 | } | |
1215 | ||
1216 | static int pscsi_parse_cdb(struct se_cmd *cmd, unsigned int *size) | |
1217 | { | |
1218 | struct se_device *dev = cmd->se_dev; | |
1219 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; | |
1220 | unsigned char *cdb = cmd->t_task_cdb; | |
1221 | int sector_ret = 0; | |
1222 | u32 sectors = 0; | |
1223 | u16 service_action; | |
1224 | int ret; | |
1225 | ||
1226 | if (cmd->se_cmd_flags & SCF_BIDI) | |
1227 | goto out_unsupported_cdb; | |
1228 | ||
1229 | switch (cdb[0]) { | |
1230 | case READ_6: | |
1231 | sectors = pscsi_get_sectors_6(cdb, cmd, §or_ret); | |
1232 | if (sector_ret) | |
1233 | goto out_unsupported_cdb; | |
1234 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1235 | cmd->t_task_lba = pscsi_get_lba_21(cdb); | |
1236 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1237 | break; | |
1238 | case READ_10: | |
1239 | sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret); | |
1240 | if (sector_ret) | |
1241 | goto out_unsupported_cdb; | |
1242 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1243 | cmd->t_task_lba = pscsi_get_lba_32(cdb); | |
1244 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1245 | break; | |
1246 | case READ_12: | |
1247 | sectors = pscsi_get_sectors_12(cdb, cmd, §or_ret); | |
1248 | if (sector_ret) | |
1249 | goto out_unsupported_cdb; | |
1250 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1251 | cmd->t_task_lba = pscsi_get_lba_32(cdb); | |
1252 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1253 | break; | |
1254 | case READ_16: | |
1255 | sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret); | |
1256 | if (sector_ret) | |
1257 | goto out_unsupported_cdb; | |
1258 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1259 | cmd->t_task_lba = pscsi_get_lba_64(cdb); | |
1260 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1261 | break; | |
1262 | case WRITE_6: | |
1263 | sectors = pscsi_get_sectors_6(cdb, cmd, §or_ret); | |
1264 | if (sector_ret) | |
1265 | goto out_unsupported_cdb; | |
1266 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1267 | cmd->t_task_lba = pscsi_get_lba_21(cdb); | |
1268 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1269 | break; | |
1270 | case WRITE_10: | |
1271 | case WRITE_VERIFY: | |
1272 | sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret); | |
1273 | if (sector_ret) | |
1274 | goto out_unsupported_cdb; | |
1275 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1276 | cmd->t_task_lba = pscsi_get_lba_32(cdb); | |
1277 | if (cdb[1] & 0x8) | |
1278 | cmd->se_cmd_flags |= SCF_FUA; | |
1279 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1280 | break; | |
1281 | case WRITE_12: | |
1282 | sectors = pscsi_get_sectors_12(cdb, cmd, §or_ret); | |
1283 | if (sector_ret) | |
1284 | goto out_unsupported_cdb; | |
1285 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1286 | cmd->t_task_lba = pscsi_get_lba_32(cdb); | |
1287 | if (cdb[1] & 0x8) | |
1288 | cmd->se_cmd_flags |= SCF_FUA; | |
1289 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1290 | break; | |
1291 | case WRITE_16: | |
1292 | sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret); | |
1293 | if (sector_ret) | |
1294 | goto out_unsupported_cdb; | |
1295 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1296 | cmd->t_task_lba = pscsi_get_lba_64(cdb); | |
1297 | if (cdb[1] & 0x8) | |
1298 | cmd->se_cmd_flags |= SCF_FUA; | |
1299 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; | |
1300 | break; | |
1301 | case VARIABLE_LENGTH_CMD: | |
1302 | service_action = get_unaligned_be16(&cdb[8]); | |
1303 | switch (service_action) { | |
1304 | case WRITE_SAME_32: | |
1305 | sectors = pscsi_get_sectors_32(cdb, cmd, §or_ret); | |
1306 | if (sector_ret) | |
1307 | goto out_unsupported_cdb; | |
1308 | ||
1309 | if (!sectors) { | |
1310 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
1311 | " supported\n"); | |
1312 | goto out_invalid_cdb_field; | |
1313 | } | |
1314 | ||
1315 | *size = pscsi_get_size(1, cdb, cmd); | |
1316 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); | |
1317 | break; | |
1318 | default: | |
1319 | pr_err("VARIABLE_LENGTH_CMD service action" | |
1320 | " 0x%04x not supported\n", service_action); | |
1321 | goto out_unsupported_cdb; | |
1322 | } | |
1323 | break; | |
1324 | case GPCMD_READ_BUFFER_CAPACITY: | |
1325 | case GPCMD_SEND_OPC: | |
1326 | *size = (cdb[7] << 8) + cdb[8]; | |
1327 | break; | |
1328 | case READ_BLOCK_LIMITS: | |
1329 | *size = READ_BLOCK_LEN; | |
1330 | break; | |
1331 | case GPCMD_GET_CONFIGURATION: | |
1332 | case GPCMD_READ_FORMAT_CAPACITIES: | |
1333 | case GPCMD_READ_DISC_INFO: | |
1334 | case GPCMD_READ_TRACK_RZONE_INFO: | |
1335 | *size = (cdb[7] << 8) + cdb[8]; | |
1336 | break; | |
1337 | case GPCMD_MECHANISM_STATUS: | |
1338 | case GPCMD_READ_DVD_STRUCTURE: | |
1339 | *size = (cdb[8] << 8) + cdb[9]; | |
1340 | break; | |
1341 | case READ_POSITION: | |
1342 | *size = READ_POSITION_LEN; | |
1343 | break; | |
1344 | case READ_BUFFER: | |
1345 | *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
1346 | break; | |
1347 | case READ_CAPACITY: | |
1348 | *size = READ_CAP_LEN; | |
1349 | break; | |
1350 | case READ_MEDIA_SERIAL_NUMBER: | |
1351 | case SERVICE_ACTION_IN: | |
1352 | case ACCESS_CONTROL_IN: | |
1353 | case ACCESS_CONTROL_OUT: | |
1354 | *size = (cdb[10] << 24) | (cdb[11] << 16) | | |
1355 | (cdb[12] << 8) | cdb[13]; | |
1356 | break; | |
1357 | case READ_TOC: | |
1358 | *size = cdb[8]; | |
1359 | break; | |
1360 | case READ_ELEMENT_STATUS: | |
1361 | *size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
1362 | break; | |
1363 | case SYNCHRONIZE_CACHE: | |
1364 | case SYNCHRONIZE_CACHE_16: | |
1365 | /* | |
1366 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
1367 | */ | |
1368 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
1369 | sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret); | |
1370 | cmd->t_task_lba = pscsi_get_lba_32(cdb); | |
1371 | } else { | |
1372 | sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret); | |
1373 | cmd->t_task_lba = pscsi_get_lba_64(cdb); | |
1374 | } | |
1375 | if (sector_ret) | |
1376 | goto out_unsupported_cdb; | |
1377 | ||
1378 | *size = pscsi_get_size(sectors, cdb, cmd); | |
1379 | break; | |
1380 | case UNMAP: | |
1381 | *size = get_unaligned_be16(&cdb[7]); | |
1382 | break; | |
1383 | case WRITE_SAME_16: | |
1384 | sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret); | |
1385 | if (sector_ret) | |
1386 | goto out_unsupported_cdb; | |
1387 | ||
1388 | if (!sectors) { | |
1389 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
1390 | goto out_invalid_cdb_field; | |
1391 | } | |
1392 | ||
1393 | *size = pscsi_get_size(1, cdb, cmd); | |
1394 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); | |
1395 | break; | |
1396 | case WRITE_SAME: | |
1397 | sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret); | |
1398 | if (sector_ret) | |
1399 | goto out_unsupported_cdb; | |
1400 | ||
1401 | if (!sectors) { | |
1402 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
1403 | goto out_invalid_cdb_field; | |
1404 | } | |
1405 | ||
1406 | *size = pscsi_get_size(1, cdb, cmd); | |
1407 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
1408 | break; | |
1409 | case ALLOW_MEDIUM_REMOVAL: | |
1410 | case ERASE: | |
1411 | case REZERO_UNIT: | |
1412 | case SEEK_10: | |
1413 | case SPACE: | |
1414 | case START_STOP: | |
1415 | case VERIFY: | |
1416 | case WRITE_FILEMARKS: | |
1417 | case GPCMD_CLOSE_TRACK: | |
1418 | case INITIALIZE_ELEMENT_STATUS: | |
1419 | case GPCMD_LOAD_UNLOAD: | |
1420 | case GPCMD_SET_SPEED: | |
1421 | case MOVE_MEDIUM: | |
1422 | *size = 0; | |
1423 | break; | |
1424 | case GET_EVENT_STATUS_NOTIFICATION: | |
1425 | *size = (cdb[7] << 8) | cdb[8]; | |
1426 | break; | |
1427 | case ATA_16: | |
1428 | switch (cdb[2] & 0x3) { /* T_LENGTH */ | |
1429 | case 0x0: | |
1430 | sectors = 0; | |
1431 | break; | |
1432 | case 0x1: | |
1433 | sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4]; | |
1434 | break; | |
1435 | case 0x2: | |
1436 | sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6]; | |
1437 | break; | |
1438 | case 0x3: | |
1439 | pr_err("T_LENGTH=0x3 not supported for ATA_16\n"); | |
1440 | goto out_invalid_cdb_field; | |
1441 | } | |
1442 | ||
1443 | /* BYTE_BLOCK */ | |
1444 | if (cdb[2] & 0x4) { | |
1445 | /* BLOCK T_TYPE: 512 or sector */ | |
1446 | *size = sectors * ((cdb[2] & 0x10) ? | |
1447 | dev->se_sub_dev->se_dev_attrib.block_size : 512); | |
1448 | } else { | |
1449 | /* BYTE */ | |
1450 | *size = sectors; | |
1451 | } | |
1452 | break; | |
1453 | default: | |
1454 | ret = spc_parse_cdb(cmd, size, true); | |
1455 | if (ret) | |
1456 | return ret; | |
1457 | } | |
1458 | ||
1459 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) { | |
1460 | if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) { | |
1461 | printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" | |
1462 | " big sectors %u exceeds fabric_max_sectors:" | |
1463 | " %u\n", cdb[0], sectors, | |
1464 | su_dev->se_dev_attrib.fabric_max_sectors); | |
1465 | goto out_invalid_cdb_field; | |
1466 | } | |
1467 | if (sectors > su_dev->se_dev_attrib.hw_max_sectors) { | |
1468 | printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" | |
1469 | " big sectors %u exceeds backend hw_max_sectors:" | |
1470 | " %u\n", cdb[0], sectors, | |
1471 | su_dev->se_dev_attrib.hw_max_sectors); | |
1472 | goto out_invalid_cdb_field; | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | return 0; | |
1477 | ||
1478 | out_unsupported_cdb: | |
1479 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1480 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1481 | return -EINVAL; | |
1482 | out_invalid_cdb_field: | |
1483 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1484 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1485 | return -EINVAL; | |
1486 | } | |
1487 | ||
1488 | ||
5787cacd CH |
1489 | static int pscsi_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl, |
1490 | u32 sgl_nents, enum dma_data_direction data_direction) | |
c66ac9db | 1491 | { |
5787cacd CH |
1492 | struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr; |
1493 | struct pscsi_plugin_task *pt; | |
02b1a746 CH |
1494 | struct request *req; |
1495 | struct bio *hbio; | |
c66ac9db NB |
1496 | int ret; |
1497 | ||
5787cacd CH |
1498 | /* |
1499 | * Dynamically alloc cdb space, since it may be larger than | |
1500 | * TCM_MAX_COMMAND_SIZE | |
1501 | */ | |
1502 | pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); | |
1503 | if (!pt) { | |
1504 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1505 | return -ENOMEM; | |
1506 | } | |
1507 | cmd->priv = pt; | |
1508 | ||
ed3102c6 CH |
1509 | memcpy(pt->pscsi_cdb, cmd->t_task_cdb, |
1510 | scsi_command_size(cmd->t_task_cdb)); | |
485fd0d1 | 1511 | |
64f1db38 | 1512 | if (!sgl) { |
02b1a746 | 1513 | req = blk_get_request(pdv->pdv_sd->request_queue, |
5787cacd | 1514 | (data_direction == DMA_TO_DEVICE), |
02b1a746 CH |
1515 | GFP_KERNEL); |
1516 | if (!req || IS_ERR(req)) { | |
1517 | pr_err("PSCSI: blk_get_request() failed: %ld\n", | |
1518 | req ? IS_ERR(req) : -ENOMEM); | |
03e98c9e NB |
1519 | cmd->scsi_sense_reason = |
1520 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
5787cacd | 1521 | goto fail; |
02b1a746 CH |
1522 | } |
1523 | } else { | |
7a83aa4e | 1524 | BUG_ON(!cmd->data_length); |
c66ac9db | 1525 | |
5787cacd | 1526 | ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); |
03e98c9e NB |
1527 | if (ret < 0) { |
1528 | cmd->scsi_sense_reason = | |
1529 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
5787cacd | 1530 | goto fail; |
03e98c9e | 1531 | } |
02b1a746 CH |
1532 | |
1533 | req = blk_make_request(pdv->pdv_sd->request_queue, hbio, | |
1534 | GFP_KERNEL); | |
ed327ed3 | 1535 | if (IS_ERR(req)) { |
02b1a746 | 1536 | pr_err("pSCSI: blk_make_request() failed\n"); |
5787cacd | 1537 | goto fail_free_bio; |
02b1a746 | 1538 | } |
c66ac9db NB |
1539 | } |
1540 | ||
02b1a746 CH |
1541 | req->cmd_type = REQ_TYPE_BLOCK_PC; |
1542 | req->end_io = pscsi_req_done; | |
5787cacd | 1543 | req->end_io_data = cmd; |
02b1a746 CH |
1544 | req->cmd_len = scsi_command_size(pt->pscsi_cdb); |
1545 | req->cmd = &pt->pscsi_cdb[0]; | |
1546 | req->sense = &pt->pscsi_sense[0]; | |
1547 | req->sense_len = 0; | |
1548 | if (pdv->pdv_sd->type == TYPE_DISK) | |
1549 | req->timeout = PS_TIMEOUT_DISK; | |
1550 | else | |
1551 | req->timeout = PS_TIMEOUT_OTHER; | |
1552 | req->retries = PS_RETRY; | |
c66ac9db | 1553 | |
02b1a746 | 1554 | blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, |
5787cacd | 1555 | (cmd->sam_task_attr == MSG_HEAD_TAG), |
02b1a746 CH |
1556 | pscsi_req_done); |
1557 | ||
03e98c9e | 1558 | return 0; |
02b1a746 | 1559 | |
5787cacd | 1560 | fail_free_bio: |
02b1a746 CH |
1561 | while (hbio) { |
1562 | struct bio *bio = hbio; | |
1563 | hbio = hbio->bi_next; | |
1564 | bio->bi_next = NULL; | |
1565 | bio_endio(bio, 0); /* XXX: should be error */ | |
1566 | } | |
03e98c9e | 1567 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
1568 | fail: |
1569 | kfree(pt); | |
03e98c9e | 1570 | return -ENOMEM; |
c66ac9db NB |
1571 | } |
1572 | ||
5787cacd | 1573 | static unsigned char *pscsi_get_sense_buffer(struct se_cmd *cmd) |
c66ac9db | 1574 | { |
5787cacd | 1575 | struct pscsi_plugin_task *pt = cmd->priv; |
c66ac9db | 1576 | |
8359cf43 | 1577 | return pt->pscsi_sense; |
c66ac9db NB |
1578 | } |
1579 | ||
1580 | /* pscsi_get_device_rev(): | |
1581 | * | |
1582 | * | |
1583 | */ | |
1584 | static u32 pscsi_get_device_rev(struct se_device *dev) | |
1585 | { | |
1586 | struct pscsi_dev_virt *pdv = dev->dev_ptr; | |
1587 | struct scsi_device *sd = pdv->pdv_sd; | |
1588 | ||
1589 | return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; | |
1590 | } | |
1591 | ||
1592 | /* pscsi_get_device_type(): | |
1593 | * | |
1594 | * | |
1595 | */ | |
1596 | static u32 pscsi_get_device_type(struct se_device *dev) | |
1597 | { | |
1598 | struct pscsi_dev_virt *pdv = dev->dev_ptr; | |
1599 | struct scsi_device *sd = pdv->pdv_sd; | |
1600 | ||
1601 | return sd->type; | |
1602 | } | |
1603 | ||
1604 | static sector_t pscsi_get_blocks(struct se_device *dev) | |
1605 | { | |
1606 | struct pscsi_dev_virt *pdv = dev->dev_ptr; | |
1607 | ||
1608 | if (pdv->pdv_bd && pdv->pdv_bd->bd_part) | |
1609 | return pdv->pdv_bd->bd_part->nr_sects; | |
1610 | ||
1611 | dump_stack(); | |
1612 | return 0; | |
1613 | } | |
1614 | ||
5787cacd | 1615 | static void pscsi_req_done(struct request *req, int uptodate) |
c66ac9db | 1616 | { |
5787cacd CH |
1617 | struct se_cmd *cmd = req->end_io_data; |
1618 | struct pscsi_plugin_task *pt = cmd->priv; | |
1619 | ||
1620 | pt->pscsi_result = req->errors; | |
1621 | pt->pscsi_resid = req->resid_len; | |
1622 | ||
1623 | cmd->scsi_status = status_byte(pt->pscsi_result) << 1; | |
1624 | if (cmd->scsi_status) { | |
1625 | pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" | |
1626 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db NB |
1627 | pt->pscsi_result); |
1628 | } | |
1629 | ||
1630 | switch (host_byte(pt->pscsi_result)) { | |
1631 | case DID_OK: | |
5787cacd | 1632 | target_complete_cmd(cmd, cmd->scsi_status); |
c66ac9db NB |
1633 | break; |
1634 | default: | |
5787cacd CH |
1635 | pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" |
1636 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db | 1637 | pt->pscsi_result); |
5787cacd CH |
1638 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1639 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); | |
c66ac9db NB |
1640 | break; |
1641 | } | |
c66ac9db | 1642 | |
c66ac9db | 1643 | __blk_put_request(req->q, req); |
5787cacd | 1644 | kfree(pt); |
c66ac9db NB |
1645 | } |
1646 | ||
1647 | static struct se_subsystem_api pscsi_template = { | |
1648 | .name = "pscsi", | |
1649 | .owner = THIS_MODULE, | |
1650 | .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, | |
c66ac9db NB |
1651 | .attach_hba = pscsi_attach_hba, |
1652 | .detach_hba = pscsi_detach_hba, | |
1653 | .pmode_enable_hba = pscsi_pmode_enable_hba, | |
1654 | .allocate_virtdevice = pscsi_allocate_virtdevice, | |
1655 | .create_virtdevice = pscsi_create_virtdevice, | |
1656 | .free_device = pscsi_free_device, | |
1657 | .transport_complete = pscsi_transport_complete, | |
d6e0175c | 1658 | .parse_cdb = pscsi_parse_cdb, |
5787cacd | 1659 | .execute_cmd = pscsi_execute_cmd, |
c66ac9db NB |
1660 | .check_configfs_dev_params = pscsi_check_configfs_dev_params, |
1661 | .set_configfs_dev_params = pscsi_set_configfs_dev_params, | |
1662 | .show_configfs_dev_params = pscsi_show_configfs_dev_params, | |
c66ac9db NB |
1663 | .get_sense_buffer = pscsi_get_sense_buffer, |
1664 | .get_device_rev = pscsi_get_device_rev, | |
1665 | .get_device_type = pscsi_get_device_type, | |
1666 | .get_blocks = pscsi_get_blocks, | |
1667 | }; | |
1668 | ||
1669 | static int __init pscsi_module_init(void) | |
1670 | { | |
1671 | return transport_subsystem_register(&pscsi_template); | |
1672 | } | |
1673 | ||
1674 | static void pscsi_module_exit(void) | |
1675 | { | |
1676 | transport_subsystem_release(&pscsi_template); | |
1677 | } | |
1678 | ||
1679 | MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); | |
1680 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
1681 | MODULE_LICENSE("GPL"); | |
1682 | ||
1683 | module_init(pscsi_module_init); | |
1684 | module_exit(pscsi_module_exit); |