Commit | Line | Data |
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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 | * | |
4c76251e | 6 | * (c) Copyright 2003-2013 Datera, Inc. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
c66ac9db NB |
26 | #include <linux/string.h> |
27 | #include <linux/parser.h> | |
28 | #include <linux/timer.h> | |
29 | #include <linux/blkdev.h> | |
30 | #include <linux/blk_types.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/spinlock.h> | |
c66ac9db NB |
33 | #include <linux/genhd.h> |
34 | #include <linux/cdrom.h> | |
d6e0175c | 35 | #include <linux/ratelimit.h> |
827509e3 | 36 | #include <linux/module.h> |
d6e0175c CH |
37 | #include <asm/unaligned.h> |
38 | ||
c66ac9db | 39 | #include <scsi/scsi_device.h> |
c66ac9db | 40 | #include <scsi/scsi_host.h> |
e66ecd50 | 41 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
42 | |
43 | #include <target/target_core_base.h> | |
c4795fb2 | 44 | #include <target/target_core_backend.h> |
c66ac9db | 45 | |
d6e0175c | 46 | #include "target_core_alua.h" |
29a05dee | 47 | #include "target_core_internal.h" |
c66ac9db NB |
48 | #include "target_core_pscsi.h" |
49 | ||
50 | #define ISPRINT(a) ((a >= ' ') && (a <= '~')) | |
51 | ||
0fd97ccf CH |
52 | static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) |
53 | { | |
54 | return container_of(dev, struct pscsi_dev_virt, dev); | |
55 | } | |
56 | ||
de103c93 | 57 | static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); |
c66ac9db NB |
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 | 80 | " Generic Target Core Stack %s\n", hba->hba_id, |
ce8dd25d | 81 | PSCSI_VERSION, TARGET_CORE_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 | 133 | sh = scsi_host_lookup(phv->phv_host_id); |
58932e96 | 134 | if (!sh) { |
6708bb27 | 135 | pr_err("pSCSI: Unable to locate SCSI Host for" |
c66ac9db | 136 | " phv_host_id: %d\n", phv->phv_host_id); |
58932e96 | 137 | return -EINVAL; |
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 | ||
0fd97ccf | 221 | wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; |
c66ac9db NB |
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 | } | |
35d1efe8 | 266 | pr_debug("T10 VPD Identifier 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 | ||
0fd97ccf CH |
301 | static int pscsi_add_device_to_list(struct se_device *dev, |
302 | struct scsi_device *sd) | |
c66ac9db | 303 | { |
0fd97ccf CH |
304 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
305 | struct request_queue *q = sd->request_queue; | |
c66ac9db | 306 | |
0fd97ccf | 307 | pdv->pdv_sd = sd; |
c66ac9db NB |
308 | |
309 | if (!sd->queue_depth) { | |
310 | sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; | |
311 | ||
9cb78c16 | 312 | pr_err("Set broken SCSI Device %d:%d:%llu" |
c66ac9db NB |
313 | " queue_depth to %d\n", sd->channel, sd->id, |
314 | sd->lun, sd->queue_depth); | |
315 | } | |
0fd97ccf CH |
316 | |
317 | dev->dev_attrib.hw_block_size = sd->sector_size; | |
318 | dev->dev_attrib.hw_max_sectors = | |
319 | min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); | |
320 | dev->dev_attrib.hw_queue_depth = sd->queue_depth; | |
321 | ||
c66ac9db NB |
322 | /* |
323 | * Setup our standard INQUIRY info into se_dev->t10_wwn | |
324 | */ | |
0fd97ccf | 325 | pscsi_set_inquiry_info(sd, &dev->t10_wwn); |
c66ac9db NB |
326 | |
327 | /* | |
328 | * Locate VPD WWN Information used for various purposes within | |
329 | * the Storage Engine. | |
330 | */ | |
0fd97ccf | 331 | if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { |
c66ac9db NB |
332 | /* |
333 | * If VPD Unit Serial returned GOOD status, try | |
334 | * VPD Device Identification page (0x83). | |
335 | */ | |
0fd97ccf | 336 | pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); |
c66ac9db NB |
337 | } |
338 | ||
339 | /* | |
340 | * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. | |
341 | */ | |
342 | if (sd->type == TYPE_TAPE) | |
343 | pscsi_tape_read_blocksize(dev, sd); | |
0fd97ccf | 344 | return 0; |
c66ac9db NB |
345 | } |
346 | ||
0fd97ccf CH |
347 | static struct se_device *pscsi_alloc_device(struct se_hba *hba, |
348 | const char *name) | |
c66ac9db NB |
349 | { |
350 | struct pscsi_dev_virt *pdv; | |
351 | ||
352 | pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); | |
6708bb27 AG |
353 | if (!pdv) { |
354 | pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); | |
c66ac9db NB |
355 | return NULL; |
356 | } | |
c66ac9db | 357 | |
6708bb27 | 358 | pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); |
0fd97ccf | 359 | return &pdv->dev; |
c66ac9db NB |
360 | } |
361 | ||
362 | /* | |
363 | * Called with struct Scsi_Host->host_lock called. | |
364 | */ | |
0fd97ccf | 365 | static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) |
5dd7ed2e | 366 | __releases(sh->host_lock) |
c66ac9db | 367 | { |
0fd97ccf CH |
368 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
369 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
370 | struct Scsi_Host *sh = sd->host; |
371 | struct block_device *bd; | |
0fd97ccf | 372 | int ret; |
c66ac9db NB |
373 | |
374 | if (scsi_device_get(sd)) { | |
9cb78c16 | 375 | pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", |
c66ac9db NB |
376 | sh->host_no, sd->channel, sd->id, sd->lun); |
377 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf | 378 | return -EIO; |
c66ac9db NB |
379 | } |
380 | spin_unlock_irq(sh->host_lock); | |
381 | /* | |
382 | * Claim exclusive struct block_device access to struct scsi_device | |
383 | * for TYPE_DISK using supplied udev_path | |
384 | */ | |
0fd97ccf | 385 | bd = blkdev_get_by_path(dev->udev_path, |
c66ac9db | 386 | FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); |
3ae279d2 | 387 | if (IS_ERR(bd)) { |
6708bb27 | 388 | pr_err("pSCSI: blkdev_get_by_path() failed\n"); |
c66ac9db | 389 | scsi_device_put(sd); |
0fd97ccf | 390 | return PTR_ERR(bd); |
c66ac9db NB |
391 | } |
392 | pdv->pdv_bd = bd; | |
393 | ||
0fd97ccf CH |
394 | ret = pscsi_add_device_to_list(dev, sd); |
395 | if (ret) { | |
c66ac9db NB |
396 | blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
397 | scsi_device_put(sd); | |
0fd97ccf | 398 | return ret; |
c66ac9db | 399 | } |
0fd97ccf | 400 | |
9cb78c16 | 401 | pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n", |
c66ac9db | 402 | phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); |
0fd97ccf | 403 | return 0; |
c66ac9db NB |
404 | } |
405 | ||
406 | /* | |
407 | * Called with struct Scsi_Host->host_lock called. | |
408 | */ | |
0fd97ccf | 409 | static int pscsi_create_type_rom(struct se_device *dev, struct scsi_device *sd) |
5dd7ed2e | 410 | __releases(sh->host_lock) |
c66ac9db | 411 | { |
0fd97ccf | 412 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db | 413 | struct Scsi_Host *sh = sd->host; |
0fd97ccf | 414 | int ret; |
c66ac9db NB |
415 | |
416 | if (scsi_device_get(sd)) { | |
9cb78c16 | 417 | pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", |
c66ac9db NB |
418 | sh->host_no, sd->channel, sd->id, sd->lun); |
419 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf | 420 | return -EIO; |
c66ac9db NB |
421 | } |
422 | spin_unlock_irq(sh->host_lock); | |
423 | ||
0fd97ccf CH |
424 | ret = pscsi_add_device_to_list(dev, sd); |
425 | if (ret) { | |
c66ac9db | 426 | scsi_device_put(sd); |
0fd97ccf | 427 | return ret; |
c66ac9db | 428 | } |
9cb78c16 | 429 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", |
c66ac9db NB |
430 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
431 | sd->channel, sd->id, sd->lun); | |
432 | ||
0fd97ccf | 433 | return 0; |
c66ac9db NB |
434 | } |
435 | ||
436 | /* | |
0fd97ccf | 437 | * Called with struct Scsi_Host->host_lock called. |
c66ac9db | 438 | */ |
0fd97ccf CH |
439 | static int pscsi_create_type_other(struct se_device *dev, |
440 | struct scsi_device *sd) | |
5dd7ed2e | 441 | __releases(sh->host_lock) |
c66ac9db | 442 | { |
0fd97ccf | 443 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db | 444 | struct Scsi_Host *sh = sd->host; |
0fd97ccf | 445 | int ret; |
c66ac9db NB |
446 | |
447 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf CH |
448 | ret = pscsi_add_device_to_list(dev, sd); |
449 | if (ret) | |
450 | return ret; | |
c66ac9db | 451 | |
9cb78c16 | 452 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", |
c66ac9db NB |
453 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
454 | sd->channel, sd->id, sd->lun); | |
0fd97ccf | 455 | return 0; |
c66ac9db NB |
456 | } |
457 | ||
ecf0dd66 | 458 | static int pscsi_configure_device(struct se_device *dev) |
c66ac9db | 459 | { |
0fd97ccf CH |
460 | struct se_hba *hba = dev->se_hba; |
461 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db | 462 | struct scsi_device *sd; |
0fd97ccf | 463 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db NB |
464 | struct Scsi_Host *sh = phv->phv_lld_host; |
465 | int legacy_mode_enable = 0; | |
0fd97ccf | 466 | int ret; |
c66ac9db | 467 | |
0fd97ccf CH |
468 | if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || |
469 | !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || | |
470 | !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { | |
471 | pr_err("Missing scsi_channel_id=, scsi_target_id= and" | |
472 | " scsi_lun_id= parameters\n"); | |
473 | return -EINVAL; | |
c66ac9db | 474 | } |
0fd97ccf | 475 | |
c66ac9db NB |
476 | /* |
477 | * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the | |
478 | * struct Scsi_Host we will need to bring the TCM/pSCSI object online | |
479 | */ | |
6708bb27 | 480 | if (!sh) { |
c66ac9db | 481 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
6708bb27 | 482 | pr_err("pSCSI: Unable to locate struct" |
c66ac9db | 483 | " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); |
0fd97ccf | 484 | return -ENODEV; |
c66ac9db NB |
485 | } |
486 | /* | |
e6a8a41a | 487 | * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device |
c66ac9db NB |
488 | * reference, we enforce that udev_path has been set |
489 | */ | |
0fd97ccf | 490 | if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { |
6708bb27 | 491 | pr_err("pSCSI: udev_path attribute has not" |
c66ac9db | 492 | " been set before ENABLE=1\n"); |
0fd97ccf | 493 | return -EINVAL; |
c66ac9db NB |
494 | } |
495 | /* | |
e6a8a41a | 496 | * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, |
c66ac9db NB |
497 | * use the original TCM hba ID to reference Linux/SCSI Host No |
498 | * and enable for PHV_LLD_SCSI_HOST_NO mode. | |
499 | */ | |
500 | if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { | |
0fd97ccf | 501 | if (hba->dev_count) { |
6708bb27 | 502 | pr_err("pSCSI: Unable to set hba_mode" |
c66ac9db | 503 | " with active devices\n"); |
0fd97ccf | 504 | return -EEXIST; |
c66ac9db | 505 | } |
c66ac9db NB |
506 | |
507 | if (pscsi_pmode_enable_hba(hba, 1) != 1) | |
0fd97ccf | 508 | return -ENODEV; |
c66ac9db NB |
509 | |
510 | legacy_mode_enable = 1; | |
511 | hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; | |
512 | sh = phv->phv_lld_host; | |
513 | } else { | |
e3d6f909 | 514 | sh = scsi_host_lookup(pdv->pdv_host_id); |
58932e96 | 515 | if (!sh) { |
6708bb27 | 516 | pr_err("pSCSI: Unable to locate" |
c66ac9db | 517 | " pdv_host_id: %d\n", pdv->pdv_host_id); |
58932e96 | 518 | return -EINVAL; |
c66ac9db | 519 | } |
5a7125c6 | 520 | pdv->pdv_lld_host = sh; |
c66ac9db NB |
521 | } |
522 | } else { | |
e6a8a41a SH |
523 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { |
524 | pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" | |
c66ac9db | 525 | " struct Scsi_Host exists\n"); |
0fd97ccf | 526 | return -EEXIST; |
c66ac9db NB |
527 | } |
528 | } | |
529 | ||
530 | spin_lock_irq(sh->host_lock); | |
531 | list_for_each_entry(sd, &sh->__devices, siblings) { | |
532 | if ((pdv->pdv_channel_id != sd->channel) || | |
533 | (pdv->pdv_target_id != sd->id) || | |
534 | (pdv->pdv_lun_id != sd->lun)) | |
535 | continue; | |
536 | /* | |
537 | * Functions will release the held struct scsi_host->host_lock | |
538 | * before calling calling pscsi_add_device_to_list() to register | |
539 | * struct scsi_device with target_core_mod. | |
540 | */ | |
541 | switch (sd->type) { | |
542 | case TYPE_DISK: | |
0fd97ccf | 543 | ret = pscsi_create_type_disk(dev, sd); |
c66ac9db NB |
544 | break; |
545 | case TYPE_ROM: | |
0fd97ccf | 546 | ret = pscsi_create_type_rom(dev, sd); |
c66ac9db NB |
547 | break; |
548 | default: | |
0fd97ccf | 549 | ret = pscsi_create_type_other(dev, sd); |
c66ac9db NB |
550 | break; |
551 | } | |
552 | ||
0fd97ccf | 553 | if (ret) { |
e6a8a41a | 554 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
555 | scsi_host_put(sh); |
556 | else if (legacy_mode_enable) { | |
557 | pscsi_pmode_enable_hba(hba, 0); | |
558 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
559 | } | |
560 | pdv->pdv_sd = NULL; | |
0fd97ccf | 561 | return ret; |
c66ac9db | 562 | } |
0fd97ccf | 563 | return 0; |
c66ac9db NB |
564 | } |
565 | spin_unlock_irq(sh->host_lock); | |
566 | ||
6708bb27 | 567 | pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, |
c66ac9db NB |
568 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); |
569 | ||
e6a8a41a | 570 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
571 | scsi_host_put(sh); |
572 | else if (legacy_mode_enable) { | |
573 | pscsi_pmode_enable_hba(hba, 0); | |
574 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
575 | } | |
576 | ||
0fd97ccf | 577 | return -ENODEV; |
c66ac9db NB |
578 | } |
579 | ||
4cc987ea NB |
580 | static void pscsi_dev_call_rcu(struct rcu_head *p) |
581 | { | |
582 | struct se_device *dev = container_of(p, struct se_device, rcu_head); | |
583 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
584 | ||
585 | kfree(pdv); | |
586 | } | |
587 | ||
0fd97ccf | 588 | static void pscsi_free_device(struct se_device *dev) |
c66ac9db | 589 | { |
0fd97ccf CH |
590 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
591 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
592 | struct scsi_device *sd = pdv->pdv_sd; |
593 | ||
594 | if (sd) { | |
595 | /* | |
596 | * Release exclusive pSCSI internal struct block_device claim for | |
597 | * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() | |
598 | */ | |
599 | if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { | |
600 | blkdev_put(pdv->pdv_bd, | |
601 | FMODE_WRITE|FMODE_READ|FMODE_EXCL); | |
602 | pdv->pdv_bd = NULL; | |
603 | } | |
604 | /* | |
605 | * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference | |
606 | * to struct Scsi_Host now. | |
607 | */ | |
608 | if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && | |
609 | (phv->phv_lld_host != NULL)) | |
610 | scsi_host_put(phv->phv_lld_host); | |
5a7125c6 AG |
611 | else if (pdv->pdv_lld_host) |
612 | scsi_host_put(pdv->pdv_lld_host); | |
c66ac9db NB |
613 | |
614 | if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) | |
615 | scsi_device_put(sd); | |
616 | ||
617 | pdv->pdv_sd = NULL; | |
618 | } | |
4cc987ea | 619 | call_rcu(&dev->rcu_head, pscsi_dev_call_rcu); |
c66ac9db NB |
620 | } |
621 | ||
d5829eac PB |
622 | static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, |
623 | unsigned char *sense_buffer) | |
c66ac9db | 624 | { |
0fd97ccf | 625 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
c66ac9db NB |
626 | struct scsi_device *sd = pdv->pdv_sd; |
627 | int result; | |
5787cacd | 628 | struct pscsi_plugin_task *pt = cmd->priv; |
1d2a2cd9 NB |
629 | unsigned char *cdb; |
630 | /* | |
631 | * Special case for REPORT_LUNs handling where pscsi_plugin_task has | |
632 | * not been allocated because TCM is handling the emulation directly. | |
633 | */ | |
634 | if (!pt) | |
d5829eac | 635 | return; |
c66ac9db | 636 | |
1d2a2cd9 | 637 | cdb = &pt->pscsi_cdb[0]; |
c66ac9db NB |
638 | result = pt->pscsi_result; |
639 | /* | |
640 | * Hack to make sure that Write-Protect modepage is set if R/O mode is | |
641 | * forced. | |
642 | */ | |
29a05dee | 643 | if (!cmd->data_length) |
306c11b2 PB |
644 | goto after_mode_sense; |
645 | ||
c66ac9db NB |
646 | if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && |
647 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
29a05dee NB |
648 | bool read_only = target_lun_is_rdonly(cmd); |
649 | ||
650 | if (read_only) { | |
de103c93 CH |
651 | unsigned char *buf; |
652 | ||
653 | buf = transport_kmap_data_sg(cmd); | |
654 | if (!buf) | |
655 | ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ | |
c66ac9db NB |
656 | |
657 | if (cdb[0] == MODE_SENSE_10) { | |
658 | if (!(buf[3] & 0x80)) | |
659 | buf[3] |= 0x80; | |
660 | } else { | |
661 | if (!(buf[2] & 0x80)) | |
662 | buf[2] |= 0x80; | |
663 | } | |
05d1c7c0 | 664 | |
5787cacd | 665 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
666 | } |
667 | } | |
668 | after_mode_sense: | |
669 | ||
306c11b2 | 670 | if (sd->type != TYPE_TAPE || !cmd->data_length) |
c66ac9db NB |
671 | goto after_mode_select; |
672 | ||
673 | /* | |
674 | * Hack to correctly obtain the initiator requested blocksize for | |
675 | * TYPE_TAPE. Since this value is dependent upon each tape media, | |
676 | * struct scsi_device->sector_size will not contain the correct value | |
677 | * by default, so we go ahead and set it so | |
678 | * TRANSPORT(dev)->get_blockdev() returns the correct value to the | |
679 | * storage engine. | |
680 | */ | |
681 | if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && | |
682 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
683 | unsigned char *buf; | |
c66ac9db NB |
684 | u16 bdl; |
685 | u32 blocksize; | |
686 | ||
687 | buf = sg_virt(&sg[0]); | |
6708bb27 AG |
688 | if (!buf) { |
689 | pr_err("Unable to get buf for scatterlist\n"); | |
c66ac9db NB |
690 | goto after_mode_select; |
691 | } | |
692 | ||
693 | if (cdb[0] == MODE_SELECT) | |
694 | bdl = (buf[3]); | |
695 | else | |
696 | bdl = (buf[6] << 8) | (buf[7]); | |
697 | ||
698 | if (!bdl) | |
699 | goto after_mode_select; | |
700 | ||
701 | if (cdb[0] == MODE_SELECT) | |
702 | blocksize = (buf[9] << 16) | (buf[10] << 8) | | |
703 | (buf[11]); | |
704 | else | |
705 | blocksize = (buf[13] << 16) | (buf[14] << 8) | | |
706 | (buf[15]); | |
707 | ||
708 | sd->sector_size = blocksize; | |
709 | } | |
710 | after_mode_select: | |
711 | ||
d5829eac PB |
712 | if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { |
713 | memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); | |
714 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
715 | } | |
c66ac9db NB |
716 | } |
717 | ||
c66ac9db NB |
718 | enum { |
719 | Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, | |
720 | Opt_scsi_lun_id, Opt_err | |
721 | }; | |
722 | ||
723 | static match_table_t tokens = { | |
724 | {Opt_scsi_host_id, "scsi_host_id=%d"}, | |
725 | {Opt_scsi_channel_id, "scsi_channel_id=%d"}, | |
726 | {Opt_scsi_target_id, "scsi_target_id=%d"}, | |
727 | {Opt_scsi_lun_id, "scsi_lun_id=%d"}, | |
728 | {Opt_err, NULL} | |
729 | }; | |
730 | ||
0fd97ccf CH |
731 | static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, |
732 | const char *page, ssize_t count) | |
c66ac9db | 733 | { |
0fd97ccf CH |
734 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
735 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
736 | char *orig, *ptr, *opts; |
737 | substring_t args[MAX_OPT_ARGS]; | |
738 | int ret = 0, arg, token; | |
739 | ||
740 | opts = kstrdup(page, GFP_KERNEL); | |
741 | if (!opts) | |
742 | return -ENOMEM; | |
743 | ||
744 | orig = opts; | |
745 | ||
90c161b6 | 746 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
747 | if (!*ptr) |
748 | continue; | |
749 | ||
750 | token = match_token(ptr, tokens, args); | |
751 | switch (token) { | |
752 | case Opt_scsi_host_id: | |
753 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { | |
6708bb27 | 754 | pr_err("PSCSI[%d]: Unable to accept" |
c66ac9db NB |
755 | " scsi_host_id while phv_mode ==" |
756 | " PHV_LLD_SCSI_HOST_NO\n", | |
757 | phv->phv_host_id); | |
758 | ret = -EINVAL; | |
759 | goto out; | |
760 | } | |
ce31c1b0 JE |
761 | ret = match_int(args, &arg); |
762 | if (ret) | |
763 | goto out; | |
c66ac9db | 764 | pdv->pdv_host_id = arg; |
6708bb27 | 765 | pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" |
c66ac9db NB |
766 | " %d\n", phv->phv_host_id, pdv->pdv_host_id); |
767 | pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; | |
768 | break; | |
769 | case Opt_scsi_channel_id: | |
ce31c1b0 JE |
770 | ret = match_int(args, &arg); |
771 | if (ret) | |
772 | goto out; | |
c66ac9db | 773 | pdv->pdv_channel_id = arg; |
6708bb27 | 774 | pr_debug("PSCSI[%d]: Referencing SCSI Channel" |
c66ac9db NB |
775 | " ID: %d\n", phv->phv_host_id, |
776 | pdv->pdv_channel_id); | |
777 | pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; | |
778 | break; | |
779 | case Opt_scsi_target_id: | |
ce31c1b0 JE |
780 | ret = match_int(args, &arg); |
781 | if (ret) | |
782 | goto out; | |
c66ac9db | 783 | pdv->pdv_target_id = arg; |
6708bb27 | 784 | pr_debug("PSCSI[%d]: Referencing SCSI Target" |
c66ac9db NB |
785 | " ID: %d\n", phv->phv_host_id, |
786 | pdv->pdv_target_id); | |
787 | pdv->pdv_flags |= PDF_HAS_TARGET_ID; | |
788 | break; | |
789 | case Opt_scsi_lun_id: | |
ce31c1b0 JE |
790 | ret = match_int(args, &arg); |
791 | if (ret) | |
792 | goto out; | |
c66ac9db | 793 | pdv->pdv_lun_id = arg; |
6708bb27 | 794 | pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" |
c66ac9db NB |
795 | " %d\n", phv->phv_host_id, pdv->pdv_lun_id); |
796 | pdv->pdv_flags |= PDF_HAS_LUN_ID; | |
797 | break; | |
798 | default: | |
799 | break; | |
800 | } | |
801 | } | |
802 | ||
803 | out: | |
804 | kfree(orig); | |
805 | return (!ret) ? count : ret; | |
806 | } | |
807 | ||
0fd97ccf | 808 | static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 809 | { |
0fd97ccf CH |
810 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
811 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
812 | struct scsi_device *sd = pdv->pdv_sd; |
813 | unsigned char host_id[16]; | |
814 | ssize_t bl; | |
815 | int i; | |
816 | ||
e6a8a41a | 817 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
818 | snprintf(host_id, 16, "%d", pdv->pdv_host_id); |
819 | else | |
820 | snprintf(host_id, 16, "PHBA Mode"); | |
821 | ||
822 | bl = sprintf(b, "SCSI Device Bus Location:" | |
823 | " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", | |
824 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, | |
825 | host_id); | |
826 | ||
827 | if (sd) { | |
828 | bl += sprintf(b + bl, " "); | |
829 | bl += sprintf(b + bl, "Vendor: "); | |
830 | for (i = 0; i < 8; i++) { | |
831 | if (ISPRINT(sd->vendor[i])) /* printable character? */ | |
832 | bl += sprintf(b + bl, "%c", sd->vendor[i]); | |
833 | else | |
834 | bl += sprintf(b + bl, " "); | |
835 | } | |
836 | bl += sprintf(b + bl, " Model: "); | |
837 | for (i = 0; i < 16; i++) { | |
838 | if (ISPRINT(sd->model[i])) /* printable character ? */ | |
839 | bl += sprintf(b + bl, "%c", sd->model[i]); | |
840 | else | |
841 | bl += sprintf(b + bl, " "); | |
842 | } | |
843 | bl += sprintf(b + bl, " Rev: "); | |
844 | for (i = 0; i < 4; i++) { | |
845 | if (ISPRINT(sd->rev[i])) /* printable character ? */ | |
846 | bl += sprintf(b + bl, "%c", sd->rev[i]); | |
847 | else | |
848 | bl += sprintf(b + bl, " "); | |
849 | } | |
850 | bl += sprintf(b + bl, "\n"); | |
851 | } | |
852 | return bl; | |
853 | } | |
854 | ||
855 | static void pscsi_bi_endio(struct bio *bio, int error) | |
856 | { | |
857 | bio_put(bio); | |
858 | } | |
859 | ||
2dbe10a2 | 860 | static inline struct bio *pscsi_get_bio(int nr_vecs) |
c66ac9db NB |
861 | { |
862 | struct bio *bio; | |
863 | /* | |
864 | * Use bio_malloc() following the comment in for bio -> struct request | |
865 | * in block/blk-core.c:blk_make_request() | |
866 | */ | |
2dbe10a2 | 867 | bio = bio_kmalloc(GFP_KERNEL, nr_vecs); |
6708bb27 AG |
868 | if (!bio) { |
869 | pr_err("PSCSI: bio_kmalloc() failed\n"); | |
c66ac9db NB |
870 | return NULL; |
871 | } | |
872 | bio->bi_end_io = pscsi_bi_endio; | |
873 | ||
874 | return bio; | |
875 | } | |
876 | ||
de103c93 CH |
877 | static sense_reason_t |
878 | pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, | |
879 | enum dma_data_direction data_direction, struct bio **hbio) | |
c66ac9db | 880 | { |
0fd97ccf | 881 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
02b1a746 | 882 | struct bio *bio = NULL, *tbio = NULL; |
c66ac9db NB |
883 | struct page *page; |
884 | struct scatterlist *sg; | |
7a83aa4e | 885 | u32 data_len = cmd->data_length, i, len, bytes, off; |
5787cacd | 886 | int nr_pages = (cmd->data_length + sgl[0].offset + |
c66ac9db | 887 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
03e98c9e | 888 | int nr_vecs = 0, rc; |
5787cacd | 889 | int rw = (data_direction == DMA_TO_DEVICE); |
c66ac9db | 890 | |
02b1a746 CH |
891 | *hbio = NULL; |
892 | ||
6708bb27 | 893 | pr_debug("PSCSI: nr_pages: %d\n", nr_pages); |
c66ac9db | 894 | |
5787cacd | 895 | for_each_sg(sgl, sg, sgl_nents, i) { |
c66ac9db NB |
896 | page = sg_page(sg); |
897 | off = sg->offset; | |
898 | len = sg->length; | |
899 | ||
6708bb27 | 900 | pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, |
c66ac9db NB |
901 | page, len, off); |
902 | ||
8f27d487 AH |
903 | /* |
904 | * We only have one page of data in each sg element, | |
905 | * we can not cross a page boundary. | |
906 | */ | |
907 | if (off + len > PAGE_SIZE) | |
908 | goto fail; | |
909 | ||
910 | if (len > 0 && data_len > 0) { | |
c66ac9db NB |
911 | bytes = min_t(unsigned int, len, PAGE_SIZE - off); |
912 | bytes = min(bytes, data_len); | |
913 | ||
6708bb27 | 914 | if (!bio) { |
c66ac9db NB |
915 | nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); |
916 | nr_pages -= nr_vecs; | |
917 | /* | |
918 | * Calls bio_kmalloc() and sets bio->bi_end_io() | |
919 | */ | |
a1d8b49a | 920 | bio = pscsi_get_bio(nr_vecs); |
6708bb27 | 921 | if (!bio) |
c66ac9db NB |
922 | goto fail; |
923 | ||
924 | if (rw) | |
925 | bio->bi_rw |= REQ_WRITE; | |
926 | ||
6708bb27 | 927 | pr_debug("PSCSI: Allocated bio: %p," |
c66ac9db NB |
928 | " dir: %s nr_vecs: %d\n", bio, |
929 | (rw) ? "rw" : "r", nr_vecs); | |
930 | /* | |
931 | * Set *hbio pointer to handle the case: | |
932 | * nr_pages > BIO_MAX_PAGES, where additional | |
933 | * bios need to be added to complete a given | |
5787cacd | 934 | * command. |
c66ac9db | 935 | */ |
02b1a746 CH |
936 | if (!*hbio) |
937 | *hbio = tbio = bio; | |
c66ac9db NB |
938 | else |
939 | tbio = tbio->bi_next = bio; | |
940 | } | |
941 | ||
6708bb27 | 942 | pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" |
c66ac9db NB |
943 | " bio: %p page: %p len: %d off: %d\n", i, bio, |
944 | page, len, off); | |
945 | ||
946 | rc = bio_add_pc_page(pdv->pdv_sd->request_queue, | |
947 | bio, page, bytes, off); | |
948 | if (rc != bytes) | |
949 | goto fail; | |
950 | ||
6708bb27 | 951 | pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", |
c66ac9db NB |
952 | bio->bi_vcnt, nr_vecs); |
953 | ||
954 | if (bio->bi_vcnt > nr_vecs) { | |
6708bb27 | 955 | pr_debug("PSCSI: Reached bio->bi_vcnt max:" |
c66ac9db NB |
956 | " %d i: %d bio: %p, allocating another" |
957 | " bio\n", bio->bi_vcnt, i, bio); | |
958 | /* | |
959 | * Clear the pointer so that another bio will | |
960 | * be allocated with pscsi_get_bio() above, the | |
961 | * current bio has already been set *tbio and | |
962 | * bio->bi_next. | |
963 | */ | |
964 | bio = NULL; | |
965 | } | |
966 | ||
c66ac9db | 967 | data_len -= bytes; |
c66ac9db NB |
968 | } |
969 | } | |
c66ac9db | 970 | |
de103c93 | 971 | return 0; |
c66ac9db | 972 | fail: |
02b1a746 CH |
973 | while (*hbio) { |
974 | bio = *hbio; | |
975 | *hbio = (*hbio)->bi_next; | |
02b1a746 | 976 | bio_endio(bio, 0); /* XXX: should be error */ |
c66ac9db | 977 | } |
de103c93 | 978 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
979 | } |
980 | ||
de103c93 CH |
981 | static sense_reason_t |
982 | pscsi_parse_cdb(struct se_cmd *cmd) | |
d6e0175c | 983 | { |
de103c93 CH |
984 | if (cmd->se_cmd_flags & SCF_BIDI) |
985 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
d6e0175c | 986 | |
7bfea53b | 987 | return passthrough_parse_cdb(cmd, pscsi_execute_cmd); |
d6e0175c CH |
988 | } |
989 | ||
de103c93 CH |
990 | static sense_reason_t |
991 | pscsi_execute_cmd(struct se_cmd *cmd) | |
c66ac9db | 992 | { |
0c2ad7d1 CH |
993 | struct scatterlist *sgl = cmd->t_data_sg; |
994 | u32 sgl_nents = cmd->t_data_nents; | |
995 | enum dma_data_direction data_direction = cmd->data_direction; | |
0fd97ccf | 996 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
5787cacd | 997 | struct pscsi_plugin_task *pt; |
02b1a746 CH |
998 | struct request *req; |
999 | struct bio *hbio; | |
de103c93 | 1000 | sense_reason_t ret; |
c66ac9db | 1001 | |
5787cacd CH |
1002 | /* |
1003 | * Dynamically alloc cdb space, since it may be larger than | |
1004 | * TCM_MAX_COMMAND_SIZE | |
1005 | */ | |
1006 | pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); | |
1007 | if (!pt) { | |
de103c93 | 1008 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
1009 | } |
1010 | cmd->priv = pt; | |
1011 | ||
ed3102c6 CH |
1012 | memcpy(pt->pscsi_cdb, cmd->t_task_cdb, |
1013 | scsi_command_size(cmd->t_task_cdb)); | |
485fd0d1 | 1014 | |
64f1db38 | 1015 | if (!sgl) { |
02b1a746 | 1016 | req = blk_get_request(pdv->pdv_sd->request_queue, |
5787cacd | 1017 | (data_direction == DMA_TO_DEVICE), |
02b1a746 | 1018 | GFP_KERNEL); |
a492f075 | 1019 | if (IS_ERR(req)) { |
fdb4c1f3 | 1020 | pr_err("PSCSI: blk_get_request() failed\n"); |
de103c93 | 1021 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd | 1022 | goto fail; |
02b1a746 | 1023 | } |
f27b087b JA |
1024 | |
1025 | blk_rq_set_block_pc(req); | |
02b1a746 | 1026 | } else { |
7a83aa4e | 1027 | BUG_ON(!cmd->data_length); |
c66ac9db | 1028 | |
5787cacd | 1029 | ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); |
de103c93 | 1030 | if (ret) |
5787cacd | 1031 | goto fail; |
02b1a746 CH |
1032 | |
1033 | req = blk_make_request(pdv->pdv_sd->request_queue, hbio, | |
1034 | GFP_KERNEL); | |
ed327ed3 | 1035 | if (IS_ERR(req)) { |
02b1a746 | 1036 | pr_err("pSCSI: blk_make_request() failed\n"); |
de103c93 | 1037 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd | 1038 | goto fail_free_bio; |
02b1a746 | 1039 | } |
c66ac9db NB |
1040 | } |
1041 | ||
02b1a746 | 1042 | req->end_io = pscsi_req_done; |
5787cacd | 1043 | req->end_io_data = cmd; |
02b1a746 CH |
1044 | req->cmd_len = scsi_command_size(pt->pscsi_cdb); |
1045 | req->cmd = &pt->pscsi_cdb[0]; | |
1046 | req->sense = &pt->pscsi_sense[0]; | |
1047 | req->sense_len = 0; | |
1048 | if (pdv->pdv_sd->type == TYPE_DISK) | |
1049 | req->timeout = PS_TIMEOUT_DISK; | |
1050 | else | |
1051 | req->timeout = PS_TIMEOUT_OTHER; | |
1052 | req->retries = PS_RETRY; | |
c66ac9db | 1053 | |
02b1a746 | 1054 | blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, |
68d81f40 | 1055 | (cmd->sam_task_attr == TCM_HEAD_TAG), |
02b1a746 CH |
1056 | pscsi_req_done); |
1057 | ||
03e98c9e | 1058 | return 0; |
02b1a746 | 1059 | |
5787cacd | 1060 | fail_free_bio: |
02b1a746 CH |
1061 | while (hbio) { |
1062 | struct bio *bio = hbio; | |
1063 | hbio = hbio->bi_next; | |
02b1a746 CH |
1064 | bio_endio(bio, 0); /* XXX: should be error */ |
1065 | } | |
de103c93 | 1066 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
1067 | fail: |
1068 | kfree(pt); | |
de103c93 | 1069 | return ret; |
c66ac9db NB |
1070 | } |
1071 | ||
c66ac9db NB |
1072 | /* pscsi_get_device_type(): |
1073 | * | |
1074 | * | |
1075 | */ | |
1076 | static u32 pscsi_get_device_type(struct se_device *dev) | |
1077 | { | |
0fd97ccf | 1078 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1079 | struct scsi_device *sd = pdv->pdv_sd; |
1080 | ||
215a8fe4 | 1081 | return (sd) ? sd->type : TYPE_NO_LUN; |
c66ac9db NB |
1082 | } |
1083 | ||
1084 | static sector_t pscsi_get_blocks(struct se_device *dev) | |
1085 | { | |
0fd97ccf | 1086 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1087 | |
1088 | if (pdv->pdv_bd && pdv->pdv_bd->bd_part) | |
1089 | return pdv->pdv_bd->bd_part->nr_sects; | |
1090 | ||
1091 | dump_stack(); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
5787cacd | 1095 | static void pscsi_req_done(struct request *req, int uptodate) |
c66ac9db | 1096 | { |
5787cacd CH |
1097 | struct se_cmd *cmd = req->end_io_data; |
1098 | struct pscsi_plugin_task *pt = cmd->priv; | |
1099 | ||
1100 | pt->pscsi_result = req->errors; | |
1101 | pt->pscsi_resid = req->resid_len; | |
1102 | ||
1103 | cmd->scsi_status = status_byte(pt->pscsi_result) << 1; | |
1104 | if (cmd->scsi_status) { | |
1105 | pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" | |
1106 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db NB |
1107 | pt->pscsi_result); |
1108 | } | |
1109 | ||
1110 | switch (host_byte(pt->pscsi_result)) { | |
1111 | case DID_OK: | |
5787cacd | 1112 | target_complete_cmd(cmd, cmd->scsi_status); |
c66ac9db NB |
1113 | break; |
1114 | default: | |
5787cacd CH |
1115 | pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" |
1116 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db | 1117 | pt->pscsi_result); |
5787cacd | 1118 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
c66ac9db NB |
1119 | break; |
1120 | } | |
c66ac9db | 1121 | |
c66ac9db | 1122 | __blk_put_request(req->q, req); |
5787cacd | 1123 | kfree(pt); |
c66ac9db NB |
1124 | } |
1125 | ||
0a06d430 | 1126 | static const struct target_backend_ops pscsi_ops = { |
c66ac9db NB |
1127 | .name = "pscsi", |
1128 | .owner = THIS_MODULE, | |
a3541703 | 1129 | .transport_flags = TRANSPORT_FLAG_PASSTHROUGH, |
c66ac9db NB |
1130 | .attach_hba = pscsi_attach_hba, |
1131 | .detach_hba = pscsi_detach_hba, | |
1132 | .pmode_enable_hba = pscsi_pmode_enable_hba, | |
0fd97ccf CH |
1133 | .alloc_device = pscsi_alloc_device, |
1134 | .configure_device = pscsi_configure_device, | |
c66ac9db NB |
1135 | .free_device = pscsi_free_device, |
1136 | .transport_complete = pscsi_transport_complete, | |
d6e0175c | 1137 | .parse_cdb = pscsi_parse_cdb, |
c66ac9db NB |
1138 | .set_configfs_dev_params = pscsi_set_configfs_dev_params, |
1139 | .show_configfs_dev_params = pscsi_show_configfs_dev_params, | |
c66ac9db NB |
1140 | .get_device_type = pscsi_get_device_type, |
1141 | .get_blocks = pscsi_get_blocks, | |
5873c4d1 | 1142 | .tb_dev_attrib_attrs = passthrough_attrib_attrs, |
c66ac9db NB |
1143 | }; |
1144 | ||
1145 | static int __init pscsi_module_init(void) | |
1146 | { | |
0a06d430 | 1147 | return transport_backend_register(&pscsi_ops); |
c66ac9db NB |
1148 | } |
1149 | ||
63b91d5a | 1150 | static void __exit pscsi_module_exit(void) |
c66ac9db | 1151 | { |
0a06d430 | 1152 | target_backend_unregister(&pscsi_ops); |
c66ac9db NB |
1153 | } |
1154 | ||
1155 | MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); | |
1156 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
1157 | MODULE_LICENSE("GPL"); | |
1158 | ||
1159 | module_init(pscsi_module_init); | |
1160 | module_exit(pscsi_module_exit); |