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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) | |
4ad8d67f | 157 | goto out_free; |
c66ac9db NB |
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]); | |
4ad8d67f | 172 | out_free: |
c66ac9db NB |
173 | if (!sdev->sector_size) |
174 | sdev->sector_size = 1024; | |
4ad8d67f | 175 | |
c66ac9db NB |
176 | kfree(buf); |
177 | } | |
178 | ||
179 | static void | |
180 | pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) | |
181 | { | |
182 | unsigned char *buf; | |
183 | ||
184 | if (sdev->inquiry_len < INQUIRY_LEN) | |
185 | return; | |
186 | ||
187 | buf = sdev->inquiry; | |
188 | if (!buf) | |
189 | return; | |
190 | /* | |
191 | * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() | |
192 | */ | |
193 | memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); | |
194 | memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); | |
195 | memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); | |
196 | } | |
197 | ||
198 | static int | |
199 | pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) | |
200 | { | |
201 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
202 | int ret; | |
203 | ||
204 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
205 | if (!buf) | |
e3d6f909 | 206 | return -ENOMEM; |
c66ac9db NB |
207 | |
208 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
209 | cdb[0] = INQUIRY; | |
210 | cdb[1] = 0x01; /* Query VPD */ | |
211 | cdb[2] = 0x80; /* Unit Serial Number */ | |
212 | cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; | |
213 | cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); | |
214 | ||
215 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
216 | INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); | |
217 | if (ret) | |
218 | goto out_free; | |
219 | ||
220 | snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); | |
221 | ||
0fd97ccf | 222 | wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; |
c66ac9db NB |
223 | |
224 | kfree(buf); | |
225 | return 0; | |
226 | ||
227 | out_free: | |
228 | kfree(buf); | |
e3d6f909 | 229 | return -EPERM; |
c66ac9db NB |
230 | } |
231 | ||
232 | static void | |
233 | pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, | |
234 | struct t10_wwn *wwn) | |
235 | { | |
236 | unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; | |
237 | int ident_len, page_len, off = 4, ret; | |
238 | struct t10_vpd *vpd; | |
239 | ||
240 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
241 | if (!buf) | |
242 | return; | |
243 | ||
244 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
245 | cdb[0] = INQUIRY; | |
246 | cdb[1] = 0x01; /* Query VPD */ | |
247 | cdb[2] = 0x83; /* Device Identifier */ | |
248 | cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; | |
249 | cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); | |
250 | ||
251 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
252 | INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, | |
253 | NULL, HZ, 1, NULL); | |
254 | if (ret) | |
255 | goto out; | |
256 | ||
257 | page_len = (buf[2] << 8) | buf[3]; | |
258 | while (page_len > 0) { | |
259 | /* Grab a pointer to the Identification descriptor */ | |
260 | page_83 = &buf[off]; | |
261 | ident_len = page_83[3]; | |
262 | if (!ident_len) { | |
6708bb27 | 263 | pr_err("page_83[3]: identifier" |
c66ac9db NB |
264 | " length zero!\n"); |
265 | break; | |
266 | } | |
35d1efe8 | 267 | pr_debug("T10 VPD Identifier Length: %d\n", ident_len); |
c66ac9db NB |
268 | |
269 | vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); | |
270 | if (!vpd) { | |
6708bb27 | 271 | pr_err("Unable to allocate memory for" |
c66ac9db NB |
272 | " struct t10_vpd\n"); |
273 | goto out; | |
274 | } | |
275 | INIT_LIST_HEAD(&vpd->vpd_list); | |
276 | ||
277 | transport_set_vpd_proto_id(vpd, page_83); | |
278 | transport_set_vpd_assoc(vpd, page_83); | |
279 | ||
280 | if (transport_set_vpd_ident_type(vpd, page_83) < 0) { | |
281 | off += (ident_len + 4); | |
282 | page_len -= (ident_len + 4); | |
283 | kfree(vpd); | |
284 | continue; | |
285 | } | |
286 | if (transport_set_vpd_ident(vpd, page_83) < 0) { | |
287 | off += (ident_len + 4); | |
288 | page_len -= (ident_len + 4); | |
289 | kfree(vpd); | |
290 | continue; | |
291 | } | |
292 | ||
293 | list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); | |
294 | off += (ident_len + 4); | |
295 | page_len -= (ident_len + 4); | |
296 | } | |
297 | ||
298 | out: | |
299 | kfree(buf); | |
300 | } | |
301 | ||
0fd97ccf CH |
302 | static int pscsi_add_device_to_list(struct se_device *dev, |
303 | struct scsi_device *sd) | |
c66ac9db | 304 | { |
0fd97ccf CH |
305 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
306 | struct request_queue *q = sd->request_queue; | |
c66ac9db | 307 | |
0fd97ccf | 308 | pdv->pdv_sd = sd; |
c66ac9db NB |
309 | |
310 | if (!sd->queue_depth) { | |
311 | sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; | |
312 | ||
9cb78c16 | 313 | pr_err("Set broken SCSI Device %d:%d:%llu" |
c66ac9db NB |
314 | " queue_depth to %d\n", sd->channel, sd->id, |
315 | sd->lun, sd->queue_depth); | |
316 | } | |
0fd97ccf | 317 | |
4ad8d67f NB |
318 | dev->dev_attrib.hw_block_size = |
319 | min_not_zero((int)sd->sector_size, 512); | |
0fd97ccf | 320 | dev->dev_attrib.hw_max_sectors = |
4ad8d67f | 321 | min_not_zero(sd->host->max_sectors, queue_max_hw_sectors(q)); |
0fd97ccf CH |
322 | dev->dev_attrib.hw_queue_depth = sd->queue_depth; |
323 | ||
c66ac9db NB |
324 | /* |
325 | * Setup our standard INQUIRY info into se_dev->t10_wwn | |
326 | */ | |
0fd97ccf | 327 | pscsi_set_inquiry_info(sd, &dev->t10_wwn); |
c66ac9db NB |
328 | |
329 | /* | |
330 | * Locate VPD WWN Information used for various purposes within | |
331 | * the Storage Engine. | |
332 | */ | |
0fd97ccf | 333 | if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { |
c66ac9db NB |
334 | /* |
335 | * If VPD Unit Serial returned GOOD status, try | |
336 | * VPD Device Identification page (0x83). | |
337 | */ | |
0fd97ccf | 338 | pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); |
c66ac9db NB |
339 | } |
340 | ||
341 | /* | |
342 | * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. | |
343 | */ | |
4ad8d67f | 344 | if (sd->type == TYPE_TAPE) { |
c66ac9db | 345 | pscsi_tape_read_blocksize(dev, sd); |
4ad8d67f NB |
346 | dev->dev_attrib.hw_block_size = sd->sector_size; |
347 | } | |
0fd97ccf | 348 | return 0; |
c66ac9db NB |
349 | } |
350 | ||
0fd97ccf CH |
351 | static struct se_device *pscsi_alloc_device(struct se_hba *hba, |
352 | const char *name) | |
c66ac9db NB |
353 | { |
354 | struct pscsi_dev_virt *pdv; | |
355 | ||
356 | pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); | |
6708bb27 AG |
357 | if (!pdv) { |
358 | pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); | |
c66ac9db NB |
359 | return NULL; |
360 | } | |
c66ac9db | 361 | |
6708bb27 | 362 | pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); |
0fd97ccf | 363 | return &pdv->dev; |
c66ac9db NB |
364 | } |
365 | ||
366 | /* | |
367 | * Called with struct Scsi_Host->host_lock called. | |
368 | */ | |
0fd97ccf | 369 | static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) |
5dd7ed2e | 370 | __releases(sh->host_lock) |
c66ac9db | 371 | { |
0fd97ccf CH |
372 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
373 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
374 | struct Scsi_Host *sh = sd->host; |
375 | struct block_device *bd; | |
0fd97ccf | 376 | int ret; |
c66ac9db NB |
377 | |
378 | if (scsi_device_get(sd)) { | |
9cb78c16 | 379 | pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", |
c66ac9db NB |
380 | sh->host_no, sd->channel, sd->id, sd->lun); |
381 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf | 382 | return -EIO; |
c66ac9db NB |
383 | } |
384 | spin_unlock_irq(sh->host_lock); | |
385 | /* | |
386 | * Claim exclusive struct block_device access to struct scsi_device | |
387 | * for TYPE_DISK using supplied udev_path | |
388 | */ | |
0fd97ccf | 389 | bd = blkdev_get_by_path(dev->udev_path, |
c66ac9db | 390 | FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); |
3ae279d2 | 391 | if (IS_ERR(bd)) { |
6708bb27 | 392 | pr_err("pSCSI: blkdev_get_by_path() failed\n"); |
c66ac9db | 393 | scsi_device_put(sd); |
0fd97ccf | 394 | return PTR_ERR(bd); |
c66ac9db NB |
395 | } |
396 | pdv->pdv_bd = bd; | |
397 | ||
0fd97ccf CH |
398 | ret = pscsi_add_device_to_list(dev, sd); |
399 | if (ret) { | |
c66ac9db NB |
400 | blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
401 | scsi_device_put(sd); | |
0fd97ccf | 402 | return ret; |
c66ac9db | 403 | } |
0fd97ccf | 404 | |
9cb78c16 | 405 | pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n", |
c66ac9db | 406 | phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); |
0fd97ccf | 407 | return 0; |
c66ac9db NB |
408 | } |
409 | ||
410 | /* | |
411 | * Called with struct Scsi_Host->host_lock called. | |
412 | */ | |
4ad8d67f | 413 | static int pscsi_create_type_nondisk(struct se_device *dev, struct scsi_device *sd) |
5dd7ed2e | 414 | __releases(sh->host_lock) |
c66ac9db | 415 | { |
0fd97ccf | 416 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db | 417 | struct Scsi_Host *sh = sd->host; |
0fd97ccf | 418 | int ret; |
c66ac9db NB |
419 | |
420 | if (scsi_device_get(sd)) { | |
9cb78c16 | 421 | pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n", |
c66ac9db NB |
422 | sh->host_no, sd->channel, sd->id, sd->lun); |
423 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf | 424 | return -EIO; |
c66ac9db NB |
425 | } |
426 | spin_unlock_irq(sh->host_lock); | |
427 | ||
0fd97ccf CH |
428 | ret = pscsi_add_device_to_list(dev, sd); |
429 | if (ret) { | |
c66ac9db | 430 | scsi_device_put(sd); |
0fd97ccf | 431 | return ret; |
c66ac9db | 432 | } |
9cb78c16 | 433 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", |
c66ac9db NB |
434 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
435 | sd->channel, sd->id, sd->lun); | |
436 | ||
0fd97ccf | 437 | return 0; |
c66ac9db NB |
438 | } |
439 | ||
ecf0dd66 | 440 | static int pscsi_configure_device(struct se_device *dev) |
c66ac9db | 441 | { |
0fd97ccf CH |
442 | struct se_hba *hba = dev->se_hba; |
443 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db | 444 | struct scsi_device *sd; |
0fd97ccf | 445 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db NB |
446 | struct Scsi_Host *sh = phv->phv_lld_host; |
447 | int legacy_mode_enable = 0; | |
0fd97ccf | 448 | int ret; |
c66ac9db | 449 | |
0fd97ccf CH |
450 | if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || |
451 | !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || | |
452 | !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { | |
453 | pr_err("Missing scsi_channel_id=, scsi_target_id= and" | |
454 | " scsi_lun_id= parameters\n"); | |
455 | return -EINVAL; | |
c66ac9db | 456 | } |
0fd97ccf | 457 | |
c66ac9db NB |
458 | /* |
459 | * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the | |
460 | * struct Scsi_Host we will need to bring the TCM/pSCSI object online | |
461 | */ | |
6708bb27 | 462 | if (!sh) { |
c66ac9db | 463 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
6708bb27 | 464 | pr_err("pSCSI: Unable to locate struct" |
c66ac9db | 465 | " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); |
0fd97ccf | 466 | return -ENODEV; |
c66ac9db NB |
467 | } |
468 | /* | |
e6a8a41a | 469 | * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device |
c66ac9db NB |
470 | * reference, we enforce that udev_path has been set |
471 | */ | |
0fd97ccf | 472 | if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { |
6708bb27 | 473 | pr_err("pSCSI: udev_path attribute has not" |
c66ac9db | 474 | " been set before ENABLE=1\n"); |
0fd97ccf | 475 | return -EINVAL; |
c66ac9db NB |
476 | } |
477 | /* | |
e6a8a41a | 478 | * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, |
c66ac9db NB |
479 | * use the original TCM hba ID to reference Linux/SCSI Host No |
480 | * and enable for PHV_LLD_SCSI_HOST_NO mode. | |
481 | */ | |
482 | if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { | |
0fd97ccf | 483 | if (hba->dev_count) { |
6708bb27 | 484 | pr_err("pSCSI: Unable to set hba_mode" |
c66ac9db | 485 | " with active devices\n"); |
0fd97ccf | 486 | return -EEXIST; |
c66ac9db | 487 | } |
c66ac9db NB |
488 | |
489 | if (pscsi_pmode_enable_hba(hba, 1) != 1) | |
0fd97ccf | 490 | return -ENODEV; |
c66ac9db NB |
491 | |
492 | legacy_mode_enable = 1; | |
493 | hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; | |
494 | sh = phv->phv_lld_host; | |
495 | } else { | |
e3d6f909 | 496 | sh = scsi_host_lookup(pdv->pdv_host_id); |
58932e96 | 497 | if (!sh) { |
6708bb27 | 498 | pr_err("pSCSI: Unable to locate" |
c66ac9db | 499 | " pdv_host_id: %d\n", pdv->pdv_host_id); |
58932e96 | 500 | return -EINVAL; |
c66ac9db | 501 | } |
5a7125c6 | 502 | pdv->pdv_lld_host = sh; |
c66ac9db NB |
503 | } |
504 | } else { | |
e6a8a41a SH |
505 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { |
506 | pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" | |
c66ac9db | 507 | " struct Scsi_Host exists\n"); |
0fd97ccf | 508 | return -EEXIST; |
c66ac9db NB |
509 | } |
510 | } | |
511 | ||
512 | spin_lock_irq(sh->host_lock); | |
513 | list_for_each_entry(sd, &sh->__devices, siblings) { | |
514 | if ((pdv->pdv_channel_id != sd->channel) || | |
515 | (pdv->pdv_target_id != sd->id) || | |
516 | (pdv->pdv_lun_id != sd->lun)) | |
517 | continue; | |
518 | /* | |
519 | * Functions will release the held struct scsi_host->host_lock | |
520 | * before calling calling pscsi_add_device_to_list() to register | |
521 | * struct scsi_device with target_core_mod. | |
522 | */ | |
523 | switch (sd->type) { | |
524 | case TYPE_DISK: | |
0fd97ccf | 525 | ret = pscsi_create_type_disk(dev, sd); |
c66ac9db | 526 | break; |
c66ac9db | 527 | default: |
4ad8d67f | 528 | ret = pscsi_create_type_nondisk(dev, sd); |
c66ac9db NB |
529 | break; |
530 | } | |
531 | ||
0fd97ccf | 532 | if (ret) { |
e6a8a41a | 533 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
534 | scsi_host_put(sh); |
535 | else if (legacy_mode_enable) { | |
536 | pscsi_pmode_enable_hba(hba, 0); | |
537 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
538 | } | |
539 | pdv->pdv_sd = NULL; | |
0fd97ccf | 540 | return ret; |
c66ac9db | 541 | } |
0fd97ccf | 542 | return 0; |
c66ac9db NB |
543 | } |
544 | spin_unlock_irq(sh->host_lock); | |
545 | ||
6708bb27 | 546 | pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, |
c66ac9db NB |
547 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); |
548 | ||
e6a8a41a | 549 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
550 | scsi_host_put(sh); |
551 | else if (legacy_mode_enable) { | |
552 | pscsi_pmode_enable_hba(hba, 0); | |
553 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
554 | } | |
555 | ||
0fd97ccf | 556 | return -ENODEV; |
c66ac9db NB |
557 | } |
558 | ||
4cc987ea NB |
559 | static void pscsi_dev_call_rcu(struct rcu_head *p) |
560 | { | |
561 | struct se_device *dev = container_of(p, struct se_device, rcu_head); | |
562 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
563 | ||
564 | kfree(pdv); | |
565 | } | |
566 | ||
0fd97ccf | 567 | static void pscsi_free_device(struct se_device *dev) |
c66ac9db | 568 | { |
0fd97ccf CH |
569 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
570 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
571 | struct scsi_device *sd = pdv->pdv_sd; |
572 | ||
573 | if (sd) { | |
574 | /* | |
575 | * Release exclusive pSCSI internal struct block_device claim for | |
576 | * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() | |
577 | */ | |
578 | if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { | |
579 | blkdev_put(pdv->pdv_bd, | |
580 | FMODE_WRITE|FMODE_READ|FMODE_EXCL); | |
581 | pdv->pdv_bd = NULL; | |
582 | } | |
583 | /* | |
584 | * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference | |
585 | * to struct Scsi_Host now. | |
586 | */ | |
587 | if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && | |
588 | (phv->phv_lld_host != NULL)) | |
589 | scsi_host_put(phv->phv_lld_host); | |
5a7125c6 AG |
590 | else if (pdv->pdv_lld_host) |
591 | scsi_host_put(pdv->pdv_lld_host); | |
c66ac9db | 592 | |
4ad8d67f | 593 | scsi_device_put(sd); |
c66ac9db NB |
594 | |
595 | pdv->pdv_sd = NULL; | |
596 | } | |
4cc987ea | 597 | call_rcu(&dev->rcu_head, pscsi_dev_call_rcu); |
c66ac9db NB |
598 | } |
599 | ||
d5829eac PB |
600 | static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, |
601 | unsigned char *sense_buffer) | |
c66ac9db | 602 | { |
0fd97ccf | 603 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
c66ac9db NB |
604 | struct scsi_device *sd = pdv->pdv_sd; |
605 | int result; | |
5787cacd | 606 | struct pscsi_plugin_task *pt = cmd->priv; |
1d2a2cd9 NB |
607 | unsigned char *cdb; |
608 | /* | |
609 | * Special case for REPORT_LUNs handling where pscsi_plugin_task has | |
610 | * not been allocated because TCM is handling the emulation directly. | |
611 | */ | |
612 | if (!pt) | |
d5829eac | 613 | return; |
c66ac9db | 614 | |
1d2a2cd9 | 615 | cdb = &pt->pscsi_cdb[0]; |
c66ac9db NB |
616 | result = pt->pscsi_result; |
617 | /* | |
618 | * Hack to make sure that Write-Protect modepage is set if R/O mode is | |
619 | * forced. | |
620 | */ | |
29a05dee | 621 | if (!cmd->data_length) |
306c11b2 PB |
622 | goto after_mode_sense; |
623 | ||
c66ac9db NB |
624 | if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && |
625 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
29a05dee NB |
626 | bool read_only = target_lun_is_rdonly(cmd); |
627 | ||
628 | if (read_only) { | |
de103c93 CH |
629 | unsigned char *buf; |
630 | ||
631 | buf = transport_kmap_data_sg(cmd); | |
632 | if (!buf) | |
633 | ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ | |
c66ac9db NB |
634 | |
635 | if (cdb[0] == MODE_SENSE_10) { | |
636 | if (!(buf[3] & 0x80)) | |
637 | buf[3] |= 0x80; | |
638 | } else { | |
639 | if (!(buf[2] & 0x80)) | |
640 | buf[2] |= 0x80; | |
641 | } | |
05d1c7c0 | 642 | |
5787cacd | 643 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
644 | } |
645 | } | |
646 | after_mode_sense: | |
647 | ||
306c11b2 | 648 | if (sd->type != TYPE_TAPE || !cmd->data_length) |
c66ac9db NB |
649 | goto after_mode_select; |
650 | ||
651 | /* | |
652 | * Hack to correctly obtain the initiator requested blocksize for | |
653 | * TYPE_TAPE. Since this value is dependent upon each tape media, | |
654 | * struct scsi_device->sector_size will not contain the correct value | |
655 | * by default, so we go ahead and set it so | |
656 | * TRANSPORT(dev)->get_blockdev() returns the correct value to the | |
657 | * storage engine. | |
658 | */ | |
659 | if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && | |
660 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
661 | unsigned char *buf; | |
c66ac9db NB |
662 | u16 bdl; |
663 | u32 blocksize; | |
664 | ||
665 | buf = sg_virt(&sg[0]); | |
6708bb27 AG |
666 | if (!buf) { |
667 | pr_err("Unable to get buf for scatterlist\n"); | |
c66ac9db NB |
668 | goto after_mode_select; |
669 | } | |
670 | ||
671 | if (cdb[0] == MODE_SELECT) | |
672 | bdl = (buf[3]); | |
673 | else | |
674 | bdl = (buf[6] << 8) | (buf[7]); | |
675 | ||
676 | if (!bdl) | |
677 | goto after_mode_select; | |
678 | ||
679 | if (cdb[0] == MODE_SELECT) | |
680 | blocksize = (buf[9] << 16) | (buf[10] << 8) | | |
681 | (buf[11]); | |
682 | else | |
683 | blocksize = (buf[13] << 16) | (buf[14] << 8) | | |
684 | (buf[15]); | |
685 | ||
686 | sd->sector_size = blocksize; | |
687 | } | |
688 | after_mode_select: | |
689 | ||
d5829eac PB |
690 | if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { |
691 | memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); | |
692 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
693 | } | |
c66ac9db NB |
694 | } |
695 | ||
c66ac9db NB |
696 | enum { |
697 | Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, | |
698 | Opt_scsi_lun_id, Opt_err | |
699 | }; | |
700 | ||
701 | static match_table_t tokens = { | |
702 | {Opt_scsi_host_id, "scsi_host_id=%d"}, | |
703 | {Opt_scsi_channel_id, "scsi_channel_id=%d"}, | |
704 | {Opt_scsi_target_id, "scsi_target_id=%d"}, | |
705 | {Opt_scsi_lun_id, "scsi_lun_id=%d"}, | |
706 | {Opt_err, NULL} | |
707 | }; | |
708 | ||
0fd97ccf CH |
709 | static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, |
710 | const char *page, ssize_t count) | |
c66ac9db | 711 | { |
0fd97ccf CH |
712 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
713 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
714 | char *orig, *ptr, *opts; |
715 | substring_t args[MAX_OPT_ARGS]; | |
716 | int ret = 0, arg, token; | |
717 | ||
718 | opts = kstrdup(page, GFP_KERNEL); | |
719 | if (!opts) | |
720 | return -ENOMEM; | |
721 | ||
722 | orig = opts; | |
723 | ||
90c161b6 | 724 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
725 | if (!*ptr) |
726 | continue; | |
727 | ||
728 | token = match_token(ptr, tokens, args); | |
729 | switch (token) { | |
730 | case Opt_scsi_host_id: | |
731 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { | |
6708bb27 | 732 | pr_err("PSCSI[%d]: Unable to accept" |
c66ac9db NB |
733 | " scsi_host_id while phv_mode ==" |
734 | " PHV_LLD_SCSI_HOST_NO\n", | |
735 | phv->phv_host_id); | |
736 | ret = -EINVAL; | |
737 | goto out; | |
738 | } | |
ce31c1b0 JE |
739 | ret = match_int(args, &arg); |
740 | if (ret) | |
741 | goto out; | |
c66ac9db | 742 | pdv->pdv_host_id = arg; |
6708bb27 | 743 | pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" |
c66ac9db NB |
744 | " %d\n", phv->phv_host_id, pdv->pdv_host_id); |
745 | pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; | |
746 | break; | |
747 | case Opt_scsi_channel_id: | |
ce31c1b0 JE |
748 | ret = match_int(args, &arg); |
749 | if (ret) | |
750 | goto out; | |
c66ac9db | 751 | pdv->pdv_channel_id = arg; |
6708bb27 | 752 | pr_debug("PSCSI[%d]: Referencing SCSI Channel" |
c66ac9db NB |
753 | " ID: %d\n", phv->phv_host_id, |
754 | pdv->pdv_channel_id); | |
755 | pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; | |
756 | break; | |
757 | case Opt_scsi_target_id: | |
ce31c1b0 JE |
758 | ret = match_int(args, &arg); |
759 | if (ret) | |
760 | goto out; | |
c66ac9db | 761 | pdv->pdv_target_id = arg; |
6708bb27 | 762 | pr_debug("PSCSI[%d]: Referencing SCSI Target" |
c66ac9db NB |
763 | " ID: %d\n", phv->phv_host_id, |
764 | pdv->pdv_target_id); | |
765 | pdv->pdv_flags |= PDF_HAS_TARGET_ID; | |
766 | break; | |
767 | case Opt_scsi_lun_id: | |
ce31c1b0 JE |
768 | ret = match_int(args, &arg); |
769 | if (ret) | |
770 | goto out; | |
c66ac9db | 771 | pdv->pdv_lun_id = arg; |
6708bb27 | 772 | pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" |
c66ac9db NB |
773 | " %d\n", phv->phv_host_id, pdv->pdv_lun_id); |
774 | pdv->pdv_flags |= PDF_HAS_LUN_ID; | |
775 | break; | |
776 | default: | |
777 | break; | |
778 | } | |
779 | } | |
780 | ||
781 | out: | |
782 | kfree(orig); | |
783 | return (!ret) ? count : ret; | |
784 | } | |
785 | ||
0fd97ccf | 786 | static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 787 | { |
0fd97ccf CH |
788 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
789 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
790 | struct scsi_device *sd = pdv->pdv_sd; |
791 | unsigned char host_id[16]; | |
792 | ssize_t bl; | |
793 | int i; | |
794 | ||
e6a8a41a | 795 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
796 | snprintf(host_id, 16, "%d", pdv->pdv_host_id); |
797 | else | |
798 | snprintf(host_id, 16, "PHBA Mode"); | |
799 | ||
800 | bl = sprintf(b, "SCSI Device Bus Location:" | |
801 | " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", | |
802 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, | |
803 | host_id); | |
804 | ||
805 | if (sd) { | |
806 | bl += sprintf(b + bl, " "); | |
807 | bl += sprintf(b + bl, "Vendor: "); | |
808 | for (i = 0; i < 8; i++) { | |
809 | if (ISPRINT(sd->vendor[i])) /* printable character? */ | |
810 | bl += sprintf(b + bl, "%c", sd->vendor[i]); | |
811 | else | |
812 | bl += sprintf(b + bl, " "); | |
813 | } | |
814 | bl += sprintf(b + bl, " Model: "); | |
815 | for (i = 0; i < 16; i++) { | |
816 | if (ISPRINT(sd->model[i])) /* printable character ? */ | |
817 | bl += sprintf(b + bl, "%c", sd->model[i]); | |
818 | else | |
819 | bl += sprintf(b + bl, " "); | |
820 | } | |
821 | bl += sprintf(b + bl, " Rev: "); | |
822 | for (i = 0; i < 4; i++) { | |
823 | if (ISPRINT(sd->rev[i])) /* printable character ? */ | |
824 | bl += sprintf(b + bl, "%c", sd->rev[i]); | |
825 | else | |
826 | bl += sprintf(b + bl, " "); | |
827 | } | |
828 | bl += sprintf(b + bl, "\n"); | |
829 | } | |
830 | return bl; | |
831 | } | |
832 | ||
4246a0b6 | 833 | static void pscsi_bi_endio(struct bio *bio) |
c66ac9db NB |
834 | { |
835 | bio_put(bio); | |
836 | } | |
837 | ||
2dbe10a2 | 838 | static inline struct bio *pscsi_get_bio(int nr_vecs) |
c66ac9db NB |
839 | { |
840 | struct bio *bio; | |
841 | /* | |
842 | * Use bio_malloc() following the comment in for bio -> struct request | |
843 | * in block/blk-core.c:blk_make_request() | |
844 | */ | |
2dbe10a2 | 845 | bio = bio_kmalloc(GFP_KERNEL, nr_vecs); |
6708bb27 AG |
846 | if (!bio) { |
847 | pr_err("PSCSI: bio_kmalloc() failed\n"); | |
c66ac9db NB |
848 | return NULL; |
849 | } | |
850 | bio->bi_end_io = pscsi_bi_endio; | |
851 | ||
852 | return bio; | |
853 | } | |
854 | ||
de103c93 CH |
855 | static sense_reason_t |
856 | pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, | |
dd9cf046 | 857 | struct request *req) |
c66ac9db | 858 | { |
0fd97ccf | 859 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
dd9cf046 | 860 | struct bio *bio = NULL; |
c66ac9db NB |
861 | struct page *page; |
862 | struct scatterlist *sg; | |
7a83aa4e | 863 | u32 data_len = cmd->data_length, i, len, bytes, off; |
5787cacd | 864 | int nr_pages = (cmd->data_length + sgl[0].offset + |
c66ac9db | 865 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
03e98c9e | 866 | int nr_vecs = 0, rc; |
dd9cf046 | 867 | int rw = (cmd->data_direction == DMA_TO_DEVICE); |
c66ac9db | 868 | |
dd9cf046 | 869 | BUG_ON(!cmd->data_length); |
02b1a746 | 870 | |
6708bb27 | 871 | pr_debug("PSCSI: nr_pages: %d\n", nr_pages); |
c66ac9db | 872 | |
5787cacd | 873 | for_each_sg(sgl, sg, sgl_nents, i) { |
c66ac9db NB |
874 | page = sg_page(sg); |
875 | off = sg->offset; | |
876 | len = sg->length; | |
877 | ||
6708bb27 | 878 | pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, |
c66ac9db NB |
879 | page, len, off); |
880 | ||
8f27d487 AH |
881 | /* |
882 | * We only have one page of data in each sg element, | |
883 | * we can not cross a page boundary. | |
884 | */ | |
885 | if (off + len > PAGE_SIZE) | |
886 | goto fail; | |
887 | ||
888 | if (len > 0 && data_len > 0) { | |
c66ac9db NB |
889 | bytes = min_t(unsigned int, len, PAGE_SIZE - off); |
890 | bytes = min(bytes, data_len); | |
891 | ||
6708bb27 | 892 | if (!bio) { |
c66ac9db NB |
893 | nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); |
894 | nr_pages -= nr_vecs; | |
895 | /* | |
896 | * Calls bio_kmalloc() and sets bio->bi_end_io() | |
897 | */ | |
a1d8b49a | 898 | bio = pscsi_get_bio(nr_vecs); |
6708bb27 | 899 | if (!bio) |
c66ac9db NB |
900 | goto fail; |
901 | ||
902 | if (rw) | |
e742fc32 | 903 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); |
c66ac9db | 904 | |
6708bb27 | 905 | pr_debug("PSCSI: Allocated bio: %p," |
c66ac9db NB |
906 | " dir: %s nr_vecs: %d\n", bio, |
907 | (rw) ? "rw" : "r", nr_vecs); | |
c66ac9db NB |
908 | } |
909 | ||
6708bb27 | 910 | pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" |
c66ac9db NB |
911 | " bio: %p page: %p len: %d off: %d\n", i, bio, |
912 | page, len, off); | |
913 | ||
914 | rc = bio_add_pc_page(pdv->pdv_sd->request_queue, | |
915 | bio, page, bytes, off); | |
6708bb27 | 916 | pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", |
84c85906 ML |
917 | bio_segments(bio), nr_vecs); |
918 | if (rc != bytes) { | |
6708bb27 | 919 | pr_debug("PSCSI: Reached bio->bi_vcnt max:" |
c66ac9db NB |
920 | " %d i: %d bio: %p, allocating another" |
921 | " bio\n", bio->bi_vcnt, i, bio); | |
dd9cf046 CH |
922 | |
923 | rc = blk_rq_append_bio(req, bio); | |
924 | if (rc) { | |
925 | pr_err("pSCSI: failed to append bio\n"); | |
926 | goto fail; | |
927 | } | |
928 | ||
c66ac9db NB |
929 | /* |
930 | * Clear the pointer so that another bio will | |
dd9cf046 | 931 | * be allocated with pscsi_get_bio() above. |
c66ac9db NB |
932 | */ |
933 | bio = NULL; | |
934 | } | |
935 | ||
c66ac9db | 936 | data_len -= bytes; |
c66ac9db NB |
937 | } |
938 | } | |
c66ac9db | 939 | |
dd9cf046 CH |
940 | if (bio) { |
941 | rc = blk_rq_append_bio(req, bio); | |
942 | if (rc) { | |
943 | pr_err("pSCSI: failed to append bio\n"); | |
944 | goto fail; | |
945 | } | |
946 | } | |
947 | ||
de103c93 | 948 | return 0; |
c66ac9db | 949 | fail: |
de103c93 | 950 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
951 | } |
952 | ||
de103c93 CH |
953 | static sense_reason_t |
954 | pscsi_parse_cdb(struct se_cmd *cmd) | |
d6e0175c | 955 | { |
de103c93 CH |
956 | if (cmd->se_cmd_flags & SCF_BIDI) |
957 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
d6e0175c | 958 | |
7bfea53b | 959 | return passthrough_parse_cdb(cmd, pscsi_execute_cmd); |
d6e0175c CH |
960 | } |
961 | ||
de103c93 CH |
962 | static sense_reason_t |
963 | pscsi_execute_cmd(struct se_cmd *cmd) | |
c66ac9db | 964 | { |
0c2ad7d1 CH |
965 | struct scatterlist *sgl = cmd->t_data_sg; |
966 | u32 sgl_nents = cmd->t_data_nents; | |
0fd97ccf | 967 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
5787cacd | 968 | struct pscsi_plugin_task *pt; |
02b1a746 | 969 | struct request *req; |
de103c93 | 970 | sense_reason_t ret; |
c66ac9db | 971 | |
5787cacd CH |
972 | /* |
973 | * Dynamically alloc cdb space, since it may be larger than | |
974 | * TCM_MAX_COMMAND_SIZE | |
975 | */ | |
976 | pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); | |
977 | if (!pt) { | |
de103c93 | 978 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
979 | } |
980 | cmd->priv = pt; | |
981 | ||
ed3102c6 CH |
982 | memcpy(pt->pscsi_cdb, cmd->t_task_cdb, |
983 | scsi_command_size(cmd->t_task_cdb)); | |
485fd0d1 | 984 | |
dd9cf046 CH |
985 | req = blk_get_request(pdv->pdv_sd->request_queue, |
986 | (cmd->data_direction == DMA_TO_DEVICE), | |
987 | GFP_KERNEL); | |
988 | if (IS_ERR(req)) { | |
989 | pr_err("PSCSI: blk_get_request() failed\n"); | |
990 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
991 | goto fail; | |
992 | } | |
f27b087b | 993 | |
dd9cf046 | 994 | blk_rq_set_block_pc(req); |
c66ac9db | 995 | |
dd9cf046 CH |
996 | if (sgl) { |
997 | ret = pscsi_map_sg(cmd, sgl, sgl_nents, req); | |
de103c93 | 998 | if (ret) |
dd9cf046 | 999 | goto fail_put_request; |
c66ac9db NB |
1000 | } |
1001 | ||
02b1a746 | 1002 | req->end_io = pscsi_req_done; |
5787cacd | 1003 | req->end_io_data = cmd; |
02b1a746 CH |
1004 | req->cmd_len = scsi_command_size(pt->pscsi_cdb); |
1005 | req->cmd = &pt->pscsi_cdb[0]; | |
1006 | req->sense = &pt->pscsi_sense[0]; | |
1007 | req->sense_len = 0; | |
1008 | if (pdv->pdv_sd->type == TYPE_DISK) | |
1009 | req->timeout = PS_TIMEOUT_DISK; | |
1010 | else | |
1011 | req->timeout = PS_TIMEOUT_OTHER; | |
1012 | req->retries = PS_RETRY; | |
c66ac9db | 1013 | |
02b1a746 | 1014 | blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, |
68d81f40 | 1015 | (cmd->sam_task_attr == TCM_HEAD_TAG), |
02b1a746 CH |
1016 | pscsi_req_done); |
1017 | ||
03e98c9e | 1018 | return 0; |
02b1a746 | 1019 | |
dd9cf046 CH |
1020 | fail_put_request: |
1021 | blk_put_request(req); | |
5787cacd CH |
1022 | fail: |
1023 | kfree(pt); | |
de103c93 | 1024 | return ret; |
c66ac9db NB |
1025 | } |
1026 | ||
c66ac9db NB |
1027 | /* pscsi_get_device_type(): |
1028 | * | |
1029 | * | |
1030 | */ | |
1031 | static u32 pscsi_get_device_type(struct se_device *dev) | |
1032 | { | |
0fd97ccf | 1033 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1034 | struct scsi_device *sd = pdv->pdv_sd; |
1035 | ||
215a8fe4 | 1036 | return (sd) ? sd->type : TYPE_NO_LUN; |
c66ac9db NB |
1037 | } |
1038 | ||
1039 | static sector_t pscsi_get_blocks(struct se_device *dev) | |
1040 | { | |
0fd97ccf | 1041 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1042 | |
1043 | if (pdv->pdv_bd && pdv->pdv_bd->bd_part) | |
1044 | return pdv->pdv_bd->bd_part->nr_sects; | |
1045 | ||
c66ac9db NB |
1046 | return 0; |
1047 | } | |
1048 | ||
5787cacd | 1049 | static void pscsi_req_done(struct request *req, int uptodate) |
c66ac9db | 1050 | { |
5787cacd CH |
1051 | struct se_cmd *cmd = req->end_io_data; |
1052 | struct pscsi_plugin_task *pt = cmd->priv; | |
1053 | ||
1054 | pt->pscsi_result = req->errors; | |
1055 | pt->pscsi_resid = req->resid_len; | |
1056 | ||
1057 | cmd->scsi_status = status_byte(pt->pscsi_result) << 1; | |
1058 | if (cmd->scsi_status) { | |
1059 | pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" | |
1060 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db NB |
1061 | pt->pscsi_result); |
1062 | } | |
1063 | ||
1064 | switch (host_byte(pt->pscsi_result)) { | |
1065 | case DID_OK: | |
5787cacd | 1066 | target_complete_cmd(cmd, cmd->scsi_status); |
c66ac9db NB |
1067 | break; |
1068 | default: | |
5787cacd CH |
1069 | pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" |
1070 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db | 1071 | pt->pscsi_result); |
5787cacd | 1072 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
c66ac9db NB |
1073 | break; |
1074 | } | |
c66ac9db | 1075 | |
c66ac9db | 1076 | __blk_put_request(req->q, req); |
5787cacd | 1077 | kfree(pt); |
c66ac9db NB |
1078 | } |
1079 | ||
0a06d430 | 1080 | static const struct target_backend_ops pscsi_ops = { |
c66ac9db NB |
1081 | .name = "pscsi", |
1082 | .owner = THIS_MODULE, | |
a3541703 | 1083 | .transport_flags = TRANSPORT_FLAG_PASSTHROUGH, |
c66ac9db NB |
1084 | .attach_hba = pscsi_attach_hba, |
1085 | .detach_hba = pscsi_detach_hba, | |
1086 | .pmode_enable_hba = pscsi_pmode_enable_hba, | |
0fd97ccf CH |
1087 | .alloc_device = pscsi_alloc_device, |
1088 | .configure_device = pscsi_configure_device, | |
c66ac9db NB |
1089 | .free_device = pscsi_free_device, |
1090 | .transport_complete = pscsi_transport_complete, | |
d6e0175c | 1091 | .parse_cdb = pscsi_parse_cdb, |
c66ac9db NB |
1092 | .set_configfs_dev_params = pscsi_set_configfs_dev_params, |
1093 | .show_configfs_dev_params = pscsi_show_configfs_dev_params, | |
c66ac9db NB |
1094 | .get_device_type = pscsi_get_device_type, |
1095 | .get_blocks = pscsi_get_blocks, | |
5873c4d1 | 1096 | .tb_dev_attrib_attrs = passthrough_attrib_attrs, |
c66ac9db NB |
1097 | }; |
1098 | ||
1099 | static int __init pscsi_module_init(void) | |
1100 | { | |
0a06d430 | 1101 | return transport_backend_register(&pscsi_ops); |
c66ac9db NB |
1102 | } |
1103 | ||
63b91d5a | 1104 | static void __exit pscsi_module_exit(void) |
c66ac9db | 1105 | { |
0a06d430 | 1106 | target_backend_unregister(&pscsi_ops); |
c66ac9db NB |
1107 | } |
1108 | ||
1109 | MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); | |
1110 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
1111 | MODULE_LICENSE("GPL"); | |
1112 | ||
1113 | module_init(pscsi_module_init); | |
1114 | module_exit(pscsi_module_exit); |