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 NB |
39 | #include <scsi/scsi.h> |
40 | #include <scsi/scsi_device.h> | |
41 | #include <scsi/scsi_cmnd.h> | |
42 | #include <scsi/scsi_host.h> | |
e66ecd50 | 43 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
44 | |
45 | #include <target/target_core_base.h> | |
c4795fb2 | 46 | #include <target/target_core_backend.h> |
6cfb546b | 47 | #include <target/target_core_backend_configfs.h> |
c66ac9db | 48 | |
d6e0175c | 49 | #include "target_core_alua.h" |
c66ac9db NB |
50 | #include "target_core_pscsi.h" |
51 | ||
52 | #define ISPRINT(a) ((a >= ' ') && (a <= '~')) | |
53 | ||
0fd97ccf CH |
54 | static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) |
55 | { | |
56 | return container_of(dev, struct pscsi_dev_virt, dev); | |
57 | } | |
58 | ||
c66ac9db NB |
59 | static struct se_subsystem_api pscsi_template; |
60 | ||
de103c93 | 61 | static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); |
c66ac9db NB |
62 | static void pscsi_req_done(struct request *, int); |
63 | ||
c66ac9db NB |
64 | /* pscsi_attach_hba(): |
65 | * | |
66 | * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. | |
67 | * from the passed SCSI Host ID. | |
68 | */ | |
69 | static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) | |
70 | { | |
c66ac9db NB |
71 | struct pscsi_hba_virt *phv; |
72 | ||
73 | phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); | |
6708bb27 AG |
74 | if (!phv) { |
75 | pr_err("Unable to allocate struct pscsi_hba_virt\n"); | |
e3d6f909 | 76 | return -ENOMEM; |
c66ac9db NB |
77 | } |
78 | phv->phv_host_id = host_id; | |
e6a8a41a | 79 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
c66ac9db | 80 | |
5951146d | 81 | hba->hba_ptr = phv; |
c66ac9db | 82 | |
6708bb27 | 83 | pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" |
c66ac9db NB |
84 | " Generic Target Core Stack %s\n", hba->hba_id, |
85 | PSCSI_VERSION, TARGET_CORE_MOD_VERSION); | |
6708bb27 | 86 | pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", |
e3d6f909 | 87 | hba->hba_id); |
c66ac9db NB |
88 | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static void pscsi_detach_hba(struct se_hba *hba) | |
93 | { | |
94 | struct pscsi_hba_virt *phv = hba->hba_ptr; | |
95 | struct Scsi_Host *scsi_host = phv->phv_lld_host; | |
96 | ||
97 | if (scsi_host) { | |
98 | scsi_host_put(scsi_host); | |
99 | ||
6708bb27 | 100 | pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" |
c66ac9db NB |
101 | " Generic Target Core\n", hba->hba_id, |
102 | (scsi_host->hostt->name) ? (scsi_host->hostt->name) : | |
103 | "Unknown"); | |
104 | } else | |
6708bb27 | 105 | pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" |
c66ac9db NB |
106 | " from Generic Target Core\n", hba->hba_id); |
107 | ||
108 | kfree(phv); | |
109 | hba->hba_ptr = NULL; | |
110 | } | |
111 | ||
112 | static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) | |
113 | { | |
8359cf43 | 114 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
c66ac9db | 115 | struct Scsi_Host *sh = phv->phv_lld_host; |
c66ac9db NB |
116 | /* |
117 | * Release the struct Scsi_Host | |
118 | */ | |
6708bb27 AG |
119 | if (!mode_flag) { |
120 | if (!sh) | |
c66ac9db NB |
121 | return 0; |
122 | ||
123 | phv->phv_lld_host = NULL; | |
e6a8a41a | 124 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
c66ac9db | 125 | |
6708bb27 | 126 | pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" |
c66ac9db NB |
127 | " %s\n", hba->hba_id, (sh->hostt->name) ? |
128 | (sh->hostt->name) : "Unknown"); | |
129 | ||
130 | scsi_host_put(sh); | |
131 | return 0; | |
132 | } | |
133 | /* | |
134 | * Otherwise, locate struct Scsi_Host from the original passed | |
135 | * pSCSI Host ID and enable for phba mode | |
136 | */ | |
e3d6f909 | 137 | sh = scsi_host_lookup(phv->phv_host_id); |
58932e96 | 138 | if (!sh) { |
6708bb27 | 139 | pr_err("pSCSI: Unable to locate SCSI Host for" |
c66ac9db | 140 | " phv_host_id: %d\n", phv->phv_host_id); |
58932e96 | 141 | return -EINVAL; |
c66ac9db | 142 | } |
c66ac9db NB |
143 | |
144 | phv->phv_lld_host = sh; | |
145 | phv->phv_mode = PHV_LLD_SCSI_HOST_NO; | |
146 | ||
6708bb27 | 147 | pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", |
c66ac9db NB |
148 | hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); |
149 | ||
150 | return 1; | |
151 | } | |
152 | ||
153 | static void pscsi_tape_read_blocksize(struct se_device *dev, | |
154 | struct scsi_device *sdev) | |
155 | { | |
156 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
157 | int ret; | |
158 | ||
159 | buf = kzalloc(12, GFP_KERNEL); | |
160 | if (!buf) | |
161 | return; | |
162 | ||
163 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
164 | cdb[0] = MODE_SENSE; | |
165 | cdb[4] = 0x0c; /* 12 bytes */ | |
166 | ||
167 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, | |
168 | HZ, 1, NULL); | |
169 | if (ret) | |
170 | goto out_free; | |
171 | ||
172 | /* | |
173 | * If MODE_SENSE still returns zero, set the default value to 1024. | |
174 | */ | |
175 | sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); | |
176 | if (!sdev->sector_size) | |
177 | sdev->sector_size = 1024; | |
178 | out_free: | |
179 | kfree(buf); | |
180 | } | |
181 | ||
182 | static void | |
183 | pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) | |
184 | { | |
185 | unsigned char *buf; | |
186 | ||
187 | if (sdev->inquiry_len < INQUIRY_LEN) | |
188 | return; | |
189 | ||
190 | buf = sdev->inquiry; | |
191 | if (!buf) | |
192 | return; | |
193 | /* | |
194 | * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() | |
195 | */ | |
196 | memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); | |
197 | memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); | |
198 | memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); | |
199 | } | |
200 | ||
201 | static int | |
202 | pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) | |
203 | { | |
204 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
205 | int ret; | |
206 | ||
207 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
208 | if (!buf) | |
e3d6f909 | 209 | return -ENOMEM; |
c66ac9db NB |
210 | |
211 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
212 | cdb[0] = INQUIRY; | |
213 | cdb[1] = 0x01; /* Query VPD */ | |
214 | cdb[2] = 0x80; /* Unit Serial Number */ | |
215 | cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; | |
216 | cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); | |
217 | ||
218 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
219 | INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); | |
220 | if (ret) | |
221 | goto out_free; | |
222 | ||
223 | snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); | |
224 | ||
0fd97ccf | 225 | wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; |
c66ac9db NB |
226 | |
227 | kfree(buf); | |
228 | return 0; | |
229 | ||
230 | out_free: | |
231 | kfree(buf); | |
e3d6f909 | 232 | return -EPERM; |
c66ac9db NB |
233 | } |
234 | ||
235 | static void | |
236 | pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, | |
237 | struct t10_wwn *wwn) | |
238 | { | |
239 | unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; | |
240 | int ident_len, page_len, off = 4, ret; | |
241 | struct t10_vpd *vpd; | |
242 | ||
243 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
244 | if (!buf) | |
245 | return; | |
246 | ||
247 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
248 | cdb[0] = INQUIRY; | |
249 | cdb[1] = 0x01; /* Query VPD */ | |
250 | cdb[2] = 0x83; /* Device Identifier */ | |
251 | cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; | |
252 | cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); | |
253 | ||
254 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
255 | INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, | |
256 | NULL, HZ, 1, NULL); | |
257 | if (ret) | |
258 | goto out; | |
259 | ||
260 | page_len = (buf[2] << 8) | buf[3]; | |
261 | while (page_len > 0) { | |
262 | /* Grab a pointer to the Identification descriptor */ | |
263 | page_83 = &buf[off]; | |
264 | ident_len = page_83[3]; | |
265 | if (!ident_len) { | |
6708bb27 | 266 | pr_err("page_83[3]: identifier" |
c66ac9db NB |
267 | " length zero!\n"); |
268 | break; | |
269 | } | |
35d1efe8 | 270 | pr_debug("T10 VPD Identifier Length: %d\n", ident_len); |
c66ac9db NB |
271 | |
272 | vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); | |
273 | if (!vpd) { | |
6708bb27 | 274 | pr_err("Unable to allocate memory for" |
c66ac9db NB |
275 | " struct t10_vpd\n"); |
276 | goto out; | |
277 | } | |
278 | INIT_LIST_HEAD(&vpd->vpd_list); | |
279 | ||
280 | transport_set_vpd_proto_id(vpd, page_83); | |
281 | transport_set_vpd_assoc(vpd, page_83); | |
282 | ||
283 | if (transport_set_vpd_ident_type(vpd, page_83) < 0) { | |
284 | off += (ident_len + 4); | |
285 | page_len -= (ident_len + 4); | |
286 | kfree(vpd); | |
287 | continue; | |
288 | } | |
289 | if (transport_set_vpd_ident(vpd, page_83) < 0) { | |
290 | off += (ident_len + 4); | |
291 | page_len -= (ident_len + 4); | |
292 | kfree(vpd); | |
293 | continue; | |
294 | } | |
295 | ||
296 | list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); | |
297 | off += (ident_len + 4); | |
298 | page_len -= (ident_len + 4); | |
299 | } | |
300 | ||
301 | out: | |
302 | kfree(buf); | |
303 | } | |
304 | ||
0fd97ccf CH |
305 | static int pscsi_add_device_to_list(struct se_device *dev, |
306 | struct scsi_device *sd) | |
c66ac9db | 307 | { |
0fd97ccf CH |
308 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
309 | struct request_queue *q = sd->request_queue; | |
c66ac9db | 310 | |
0fd97ccf | 311 | pdv->pdv_sd = sd; |
c66ac9db NB |
312 | |
313 | if (!sd->queue_depth) { | |
314 | sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; | |
315 | ||
9cb78c16 | 316 | pr_err("Set broken SCSI Device %d:%d:%llu" |
c66ac9db NB |
317 | " queue_depth to %d\n", sd->channel, sd->id, |
318 | sd->lun, sd->queue_depth); | |
319 | } | |
0fd97ccf CH |
320 | |
321 | dev->dev_attrib.hw_block_size = sd->sector_size; | |
322 | dev->dev_attrib.hw_max_sectors = | |
323 | min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); | |
324 | dev->dev_attrib.hw_queue_depth = sd->queue_depth; | |
325 | ||
c66ac9db NB |
326 | /* |
327 | * Setup our standard INQUIRY info into se_dev->t10_wwn | |
328 | */ | |
0fd97ccf | 329 | pscsi_set_inquiry_info(sd, &dev->t10_wwn); |
c66ac9db NB |
330 | |
331 | /* | |
332 | * Locate VPD WWN Information used for various purposes within | |
333 | * the Storage Engine. | |
334 | */ | |
0fd97ccf | 335 | if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { |
c66ac9db NB |
336 | /* |
337 | * If VPD Unit Serial returned GOOD status, try | |
338 | * VPD Device Identification page (0x83). | |
339 | */ | |
0fd97ccf | 340 | pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); |
c66ac9db NB |
341 | } |
342 | ||
343 | /* | |
344 | * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. | |
345 | */ | |
346 | if (sd->type == TYPE_TAPE) | |
347 | pscsi_tape_read_blocksize(dev, sd); | |
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 | */ | |
0fd97ccf | 413 | static int pscsi_create_type_rom(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 | ||
440 | /* | |
0fd97ccf | 441 | * Called with struct Scsi_Host->host_lock called. |
c66ac9db | 442 | */ |
0fd97ccf CH |
443 | static int pscsi_create_type_other(struct se_device *dev, |
444 | struct scsi_device *sd) | |
5dd7ed2e | 445 | __releases(sh->host_lock) |
c66ac9db | 446 | { |
0fd97ccf | 447 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db | 448 | struct Scsi_Host *sh = sd->host; |
0fd97ccf | 449 | int ret; |
c66ac9db NB |
450 | |
451 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf CH |
452 | ret = pscsi_add_device_to_list(dev, sd); |
453 | if (ret) | |
454 | return ret; | |
c66ac9db | 455 | |
9cb78c16 | 456 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n", |
c66ac9db NB |
457 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
458 | sd->channel, sd->id, sd->lun); | |
0fd97ccf | 459 | return 0; |
c66ac9db NB |
460 | } |
461 | ||
ecf0dd66 | 462 | static int pscsi_configure_device(struct se_device *dev) |
c66ac9db | 463 | { |
0fd97ccf CH |
464 | struct se_hba *hba = dev->se_hba; |
465 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db | 466 | struct scsi_device *sd; |
0fd97ccf | 467 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db NB |
468 | struct Scsi_Host *sh = phv->phv_lld_host; |
469 | int legacy_mode_enable = 0; | |
0fd97ccf | 470 | int ret; |
c66ac9db | 471 | |
0fd97ccf CH |
472 | if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || |
473 | !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || | |
474 | !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { | |
475 | pr_err("Missing scsi_channel_id=, scsi_target_id= and" | |
476 | " scsi_lun_id= parameters\n"); | |
477 | return -EINVAL; | |
c66ac9db | 478 | } |
0fd97ccf | 479 | |
c66ac9db NB |
480 | /* |
481 | * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the | |
482 | * struct Scsi_Host we will need to bring the TCM/pSCSI object online | |
483 | */ | |
6708bb27 | 484 | if (!sh) { |
c66ac9db | 485 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
6708bb27 | 486 | pr_err("pSCSI: Unable to locate struct" |
c66ac9db | 487 | " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); |
0fd97ccf | 488 | return -ENODEV; |
c66ac9db NB |
489 | } |
490 | /* | |
e6a8a41a | 491 | * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device |
c66ac9db NB |
492 | * reference, we enforce that udev_path has been set |
493 | */ | |
0fd97ccf | 494 | if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { |
6708bb27 | 495 | pr_err("pSCSI: udev_path attribute has not" |
c66ac9db | 496 | " been set before ENABLE=1\n"); |
0fd97ccf | 497 | return -EINVAL; |
c66ac9db NB |
498 | } |
499 | /* | |
e6a8a41a | 500 | * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, |
c66ac9db NB |
501 | * use the original TCM hba ID to reference Linux/SCSI Host No |
502 | * and enable for PHV_LLD_SCSI_HOST_NO mode. | |
503 | */ | |
504 | if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { | |
0fd97ccf | 505 | if (hba->dev_count) { |
6708bb27 | 506 | pr_err("pSCSI: Unable to set hba_mode" |
c66ac9db | 507 | " with active devices\n"); |
0fd97ccf | 508 | return -EEXIST; |
c66ac9db | 509 | } |
c66ac9db NB |
510 | |
511 | if (pscsi_pmode_enable_hba(hba, 1) != 1) | |
0fd97ccf | 512 | return -ENODEV; |
c66ac9db NB |
513 | |
514 | legacy_mode_enable = 1; | |
515 | hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; | |
516 | sh = phv->phv_lld_host; | |
517 | } else { | |
e3d6f909 | 518 | sh = scsi_host_lookup(pdv->pdv_host_id); |
58932e96 | 519 | if (!sh) { |
6708bb27 | 520 | pr_err("pSCSI: Unable to locate" |
c66ac9db | 521 | " pdv_host_id: %d\n", pdv->pdv_host_id); |
58932e96 | 522 | return -EINVAL; |
c66ac9db NB |
523 | } |
524 | } | |
525 | } else { | |
e6a8a41a SH |
526 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { |
527 | pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" | |
c66ac9db | 528 | " struct Scsi_Host exists\n"); |
0fd97ccf | 529 | return -EEXIST; |
c66ac9db NB |
530 | } |
531 | } | |
532 | ||
533 | spin_lock_irq(sh->host_lock); | |
534 | list_for_each_entry(sd, &sh->__devices, siblings) { | |
535 | if ((pdv->pdv_channel_id != sd->channel) || | |
536 | (pdv->pdv_target_id != sd->id) || | |
537 | (pdv->pdv_lun_id != sd->lun)) | |
538 | continue; | |
539 | /* | |
540 | * Functions will release the held struct scsi_host->host_lock | |
541 | * before calling calling pscsi_add_device_to_list() to register | |
542 | * struct scsi_device with target_core_mod. | |
543 | */ | |
544 | switch (sd->type) { | |
545 | case TYPE_DISK: | |
0fd97ccf | 546 | ret = pscsi_create_type_disk(dev, sd); |
c66ac9db NB |
547 | break; |
548 | case TYPE_ROM: | |
0fd97ccf | 549 | ret = pscsi_create_type_rom(dev, sd); |
c66ac9db NB |
550 | break; |
551 | default: | |
0fd97ccf | 552 | ret = pscsi_create_type_other(dev, sd); |
c66ac9db NB |
553 | break; |
554 | } | |
555 | ||
0fd97ccf | 556 | if (ret) { |
e6a8a41a | 557 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
558 | scsi_host_put(sh); |
559 | else if (legacy_mode_enable) { | |
560 | pscsi_pmode_enable_hba(hba, 0); | |
561 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
562 | } | |
563 | pdv->pdv_sd = NULL; | |
0fd97ccf | 564 | return ret; |
c66ac9db | 565 | } |
0fd97ccf | 566 | return 0; |
c66ac9db NB |
567 | } |
568 | spin_unlock_irq(sh->host_lock); | |
569 | ||
6708bb27 | 570 | pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, |
c66ac9db NB |
571 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); |
572 | ||
e6a8a41a | 573 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
574 | scsi_host_put(sh); |
575 | else if (legacy_mode_enable) { | |
576 | pscsi_pmode_enable_hba(hba, 0); | |
577 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
578 | } | |
579 | ||
0fd97ccf | 580 | return -ENODEV; |
c66ac9db NB |
581 | } |
582 | ||
0fd97ccf | 583 | static void pscsi_free_device(struct se_device *dev) |
c66ac9db | 584 | { |
0fd97ccf CH |
585 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
586 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
587 | struct scsi_device *sd = pdv->pdv_sd; |
588 | ||
589 | if (sd) { | |
590 | /* | |
591 | * Release exclusive pSCSI internal struct block_device claim for | |
592 | * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() | |
593 | */ | |
594 | if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { | |
595 | blkdev_put(pdv->pdv_bd, | |
596 | FMODE_WRITE|FMODE_READ|FMODE_EXCL); | |
597 | pdv->pdv_bd = NULL; | |
598 | } | |
599 | /* | |
600 | * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference | |
601 | * to struct Scsi_Host now. | |
602 | */ | |
603 | if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && | |
604 | (phv->phv_lld_host != NULL)) | |
605 | scsi_host_put(phv->phv_lld_host); | |
606 | ||
607 | if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) | |
608 | scsi_device_put(sd); | |
609 | ||
610 | pdv->pdv_sd = NULL; | |
611 | } | |
612 | ||
613 | kfree(pdv); | |
614 | } | |
615 | ||
d5829eac PB |
616 | static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, |
617 | unsigned char *sense_buffer) | |
c66ac9db | 618 | { |
0fd97ccf | 619 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
c66ac9db NB |
620 | struct scsi_device *sd = pdv->pdv_sd; |
621 | int result; | |
5787cacd | 622 | struct pscsi_plugin_task *pt = cmd->priv; |
1d2a2cd9 NB |
623 | unsigned char *cdb; |
624 | /* | |
625 | * Special case for REPORT_LUNs handling where pscsi_plugin_task has | |
626 | * not been allocated because TCM is handling the emulation directly. | |
627 | */ | |
628 | if (!pt) | |
d5829eac | 629 | return; |
c66ac9db | 630 | |
1d2a2cd9 | 631 | cdb = &pt->pscsi_cdb[0]; |
c66ac9db NB |
632 | result = pt->pscsi_result; |
633 | /* | |
634 | * Hack to make sure that Write-Protect modepage is set if R/O mode is | |
635 | * forced. | |
636 | */ | |
306c11b2 PB |
637 | if (!cmd->se_deve || !cmd->data_length) |
638 | goto after_mode_sense; | |
639 | ||
c66ac9db NB |
640 | if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && |
641 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
5787cacd | 642 | if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { |
de103c93 CH |
643 | unsigned char *buf; |
644 | ||
645 | buf = transport_kmap_data_sg(cmd); | |
646 | if (!buf) | |
647 | ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ | |
c66ac9db NB |
648 | |
649 | if (cdb[0] == MODE_SENSE_10) { | |
650 | if (!(buf[3] & 0x80)) | |
651 | buf[3] |= 0x80; | |
652 | } else { | |
653 | if (!(buf[2] & 0x80)) | |
654 | buf[2] |= 0x80; | |
655 | } | |
05d1c7c0 | 656 | |
5787cacd | 657 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
658 | } |
659 | } | |
660 | after_mode_sense: | |
661 | ||
306c11b2 | 662 | if (sd->type != TYPE_TAPE || !cmd->data_length) |
c66ac9db NB |
663 | goto after_mode_select; |
664 | ||
665 | /* | |
666 | * Hack to correctly obtain the initiator requested blocksize for | |
667 | * TYPE_TAPE. Since this value is dependent upon each tape media, | |
668 | * struct scsi_device->sector_size will not contain the correct value | |
669 | * by default, so we go ahead and set it so | |
670 | * TRANSPORT(dev)->get_blockdev() returns the correct value to the | |
671 | * storage engine. | |
672 | */ | |
673 | if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && | |
674 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
675 | unsigned char *buf; | |
c66ac9db NB |
676 | u16 bdl; |
677 | u32 blocksize; | |
678 | ||
679 | buf = sg_virt(&sg[0]); | |
6708bb27 AG |
680 | if (!buf) { |
681 | pr_err("Unable to get buf for scatterlist\n"); | |
c66ac9db NB |
682 | goto after_mode_select; |
683 | } | |
684 | ||
685 | if (cdb[0] == MODE_SELECT) | |
686 | bdl = (buf[3]); | |
687 | else | |
688 | bdl = (buf[6] << 8) | (buf[7]); | |
689 | ||
690 | if (!bdl) | |
691 | goto after_mode_select; | |
692 | ||
693 | if (cdb[0] == MODE_SELECT) | |
694 | blocksize = (buf[9] << 16) | (buf[10] << 8) | | |
695 | (buf[11]); | |
696 | else | |
697 | blocksize = (buf[13] << 16) | (buf[14] << 8) | | |
698 | (buf[15]); | |
699 | ||
700 | sd->sector_size = blocksize; | |
701 | } | |
702 | after_mode_select: | |
703 | ||
d5829eac PB |
704 | if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { |
705 | memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); | |
706 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
707 | } | |
c66ac9db NB |
708 | } |
709 | ||
c66ac9db NB |
710 | enum { |
711 | Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, | |
712 | Opt_scsi_lun_id, Opt_err | |
713 | }; | |
714 | ||
715 | static match_table_t tokens = { | |
716 | {Opt_scsi_host_id, "scsi_host_id=%d"}, | |
717 | {Opt_scsi_channel_id, "scsi_channel_id=%d"}, | |
718 | {Opt_scsi_target_id, "scsi_target_id=%d"}, | |
719 | {Opt_scsi_lun_id, "scsi_lun_id=%d"}, | |
720 | {Opt_err, NULL} | |
721 | }; | |
722 | ||
0fd97ccf CH |
723 | static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, |
724 | const char *page, ssize_t count) | |
c66ac9db | 725 | { |
0fd97ccf CH |
726 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
727 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
728 | char *orig, *ptr, *opts; |
729 | substring_t args[MAX_OPT_ARGS]; | |
730 | int ret = 0, arg, token; | |
731 | ||
732 | opts = kstrdup(page, GFP_KERNEL); | |
733 | if (!opts) | |
734 | return -ENOMEM; | |
735 | ||
736 | orig = opts; | |
737 | ||
90c161b6 | 738 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
739 | if (!*ptr) |
740 | continue; | |
741 | ||
742 | token = match_token(ptr, tokens, args); | |
743 | switch (token) { | |
744 | case Opt_scsi_host_id: | |
745 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { | |
6708bb27 | 746 | pr_err("PSCSI[%d]: Unable to accept" |
c66ac9db NB |
747 | " scsi_host_id while phv_mode ==" |
748 | " PHV_LLD_SCSI_HOST_NO\n", | |
749 | phv->phv_host_id); | |
750 | ret = -EINVAL; | |
751 | goto out; | |
752 | } | |
ce31c1b0 JE |
753 | ret = match_int(args, &arg); |
754 | if (ret) | |
755 | goto out; | |
c66ac9db | 756 | pdv->pdv_host_id = arg; |
6708bb27 | 757 | pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" |
c66ac9db NB |
758 | " %d\n", phv->phv_host_id, pdv->pdv_host_id); |
759 | pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; | |
760 | break; | |
761 | case Opt_scsi_channel_id: | |
ce31c1b0 JE |
762 | ret = match_int(args, &arg); |
763 | if (ret) | |
764 | goto out; | |
c66ac9db | 765 | pdv->pdv_channel_id = arg; |
6708bb27 | 766 | pr_debug("PSCSI[%d]: Referencing SCSI Channel" |
c66ac9db NB |
767 | " ID: %d\n", phv->phv_host_id, |
768 | pdv->pdv_channel_id); | |
769 | pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; | |
770 | break; | |
771 | case Opt_scsi_target_id: | |
ce31c1b0 JE |
772 | ret = match_int(args, &arg); |
773 | if (ret) | |
774 | goto out; | |
c66ac9db | 775 | pdv->pdv_target_id = arg; |
6708bb27 | 776 | pr_debug("PSCSI[%d]: Referencing SCSI Target" |
c66ac9db NB |
777 | " ID: %d\n", phv->phv_host_id, |
778 | pdv->pdv_target_id); | |
779 | pdv->pdv_flags |= PDF_HAS_TARGET_ID; | |
780 | break; | |
781 | case Opt_scsi_lun_id: | |
ce31c1b0 JE |
782 | ret = match_int(args, &arg); |
783 | if (ret) | |
784 | goto out; | |
c66ac9db | 785 | pdv->pdv_lun_id = arg; |
6708bb27 | 786 | pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" |
c66ac9db NB |
787 | " %d\n", phv->phv_host_id, pdv->pdv_lun_id); |
788 | pdv->pdv_flags |= PDF_HAS_LUN_ID; | |
789 | break; | |
790 | default: | |
791 | break; | |
792 | } | |
793 | } | |
794 | ||
795 | out: | |
796 | kfree(orig); | |
797 | return (!ret) ? count : ret; | |
798 | } | |
799 | ||
0fd97ccf | 800 | static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 801 | { |
0fd97ccf CH |
802 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
803 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
804 | struct scsi_device *sd = pdv->pdv_sd; |
805 | unsigned char host_id[16]; | |
806 | ssize_t bl; | |
807 | int i; | |
808 | ||
e6a8a41a | 809 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
810 | snprintf(host_id, 16, "%d", pdv->pdv_host_id); |
811 | else | |
812 | snprintf(host_id, 16, "PHBA Mode"); | |
813 | ||
814 | bl = sprintf(b, "SCSI Device Bus Location:" | |
815 | " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", | |
816 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, | |
817 | host_id); | |
818 | ||
819 | if (sd) { | |
820 | bl += sprintf(b + bl, " "); | |
821 | bl += sprintf(b + bl, "Vendor: "); | |
822 | for (i = 0; i < 8; i++) { | |
823 | if (ISPRINT(sd->vendor[i])) /* printable character? */ | |
824 | bl += sprintf(b + bl, "%c", sd->vendor[i]); | |
825 | else | |
826 | bl += sprintf(b + bl, " "); | |
827 | } | |
828 | bl += sprintf(b + bl, " Model: "); | |
829 | for (i = 0; i < 16; i++) { | |
830 | if (ISPRINT(sd->model[i])) /* printable character ? */ | |
831 | bl += sprintf(b + bl, "%c", sd->model[i]); | |
832 | else | |
833 | bl += sprintf(b + bl, " "); | |
834 | } | |
835 | bl += sprintf(b + bl, " Rev: "); | |
836 | for (i = 0; i < 4; i++) { | |
837 | if (ISPRINT(sd->rev[i])) /* printable character ? */ | |
838 | bl += sprintf(b + bl, "%c", sd->rev[i]); | |
839 | else | |
840 | bl += sprintf(b + bl, " "); | |
841 | } | |
842 | bl += sprintf(b + bl, "\n"); | |
843 | } | |
844 | return bl; | |
845 | } | |
846 | ||
847 | static void pscsi_bi_endio(struct bio *bio, int error) | |
848 | { | |
849 | bio_put(bio); | |
850 | } | |
851 | ||
2dbe10a2 | 852 | static inline struct bio *pscsi_get_bio(int nr_vecs) |
c66ac9db NB |
853 | { |
854 | struct bio *bio; | |
855 | /* | |
856 | * Use bio_malloc() following the comment in for bio -> struct request | |
857 | * in block/blk-core.c:blk_make_request() | |
858 | */ | |
2dbe10a2 | 859 | bio = bio_kmalloc(GFP_KERNEL, nr_vecs); |
6708bb27 AG |
860 | if (!bio) { |
861 | pr_err("PSCSI: bio_kmalloc() failed\n"); | |
c66ac9db NB |
862 | return NULL; |
863 | } | |
864 | bio->bi_end_io = pscsi_bi_endio; | |
865 | ||
866 | return bio; | |
867 | } | |
868 | ||
de103c93 CH |
869 | static sense_reason_t |
870 | pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, | |
871 | enum dma_data_direction data_direction, struct bio **hbio) | |
c66ac9db | 872 | { |
0fd97ccf | 873 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
02b1a746 | 874 | struct bio *bio = NULL, *tbio = NULL; |
c66ac9db NB |
875 | struct page *page; |
876 | struct scatterlist *sg; | |
7a83aa4e | 877 | u32 data_len = cmd->data_length, i, len, bytes, off; |
5787cacd | 878 | int nr_pages = (cmd->data_length + sgl[0].offset + |
c66ac9db | 879 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
03e98c9e | 880 | int nr_vecs = 0, rc; |
5787cacd | 881 | int rw = (data_direction == DMA_TO_DEVICE); |
c66ac9db | 882 | |
02b1a746 CH |
883 | *hbio = NULL; |
884 | ||
6708bb27 | 885 | pr_debug("PSCSI: nr_pages: %d\n", nr_pages); |
c66ac9db | 886 | |
5787cacd | 887 | for_each_sg(sgl, sg, sgl_nents, i) { |
c66ac9db NB |
888 | page = sg_page(sg); |
889 | off = sg->offset; | |
890 | len = sg->length; | |
891 | ||
6708bb27 | 892 | pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, |
c66ac9db NB |
893 | page, len, off); |
894 | ||
8f27d487 AH |
895 | /* |
896 | * We only have one page of data in each sg element, | |
897 | * we can not cross a page boundary. | |
898 | */ | |
899 | if (off + len > PAGE_SIZE) | |
900 | goto fail; | |
901 | ||
902 | if (len > 0 && data_len > 0) { | |
c66ac9db NB |
903 | bytes = min_t(unsigned int, len, PAGE_SIZE - off); |
904 | bytes = min(bytes, data_len); | |
905 | ||
6708bb27 | 906 | if (!bio) { |
c66ac9db NB |
907 | nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); |
908 | nr_pages -= nr_vecs; | |
909 | /* | |
910 | * Calls bio_kmalloc() and sets bio->bi_end_io() | |
911 | */ | |
a1d8b49a | 912 | bio = pscsi_get_bio(nr_vecs); |
6708bb27 | 913 | if (!bio) |
c66ac9db NB |
914 | goto fail; |
915 | ||
916 | if (rw) | |
917 | bio->bi_rw |= REQ_WRITE; | |
918 | ||
6708bb27 | 919 | pr_debug("PSCSI: Allocated bio: %p," |
c66ac9db NB |
920 | " dir: %s nr_vecs: %d\n", bio, |
921 | (rw) ? "rw" : "r", nr_vecs); | |
922 | /* | |
923 | * Set *hbio pointer to handle the case: | |
924 | * nr_pages > BIO_MAX_PAGES, where additional | |
925 | * bios need to be added to complete a given | |
5787cacd | 926 | * command. |
c66ac9db | 927 | */ |
02b1a746 CH |
928 | if (!*hbio) |
929 | *hbio = tbio = bio; | |
c66ac9db NB |
930 | else |
931 | tbio = tbio->bi_next = bio; | |
932 | } | |
933 | ||
6708bb27 | 934 | pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" |
c66ac9db NB |
935 | " bio: %p page: %p len: %d off: %d\n", i, bio, |
936 | page, len, off); | |
937 | ||
938 | rc = bio_add_pc_page(pdv->pdv_sd->request_queue, | |
939 | bio, page, bytes, off); | |
940 | if (rc != bytes) | |
941 | goto fail; | |
942 | ||
6708bb27 | 943 | pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", |
c66ac9db NB |
944 | bio->bi_vcnt, nr_vecs); |
945 | ||
946 | if (bio->bi_vcnt > nr_vecs) { | |
6708bb27 | 947 | pr_debug("PSCSI: Reached bio->bi_vcnt max:" |
c66ac9db NB |
948 | " %d i: %d bio: %p, allocating another" |
949 | " bio\n", bio->bi_vcnt, i, bio); | |
950 | /* | |
951 | * Clear the pointer so that another bio will | |
952 | * be allocated with pscsi_get_bio() above, the | |
953 | * current bio has already been set *tbio and | |
954 | * bio->bi_next. | |
955 | */ | |
956 | bio = NULL; | |
957 | } | |
958 | ||
c66ac9db | 959 | data_len -= bytes; |
c66ac9db NB |
960 | } |
961 | } | |
c66ac9db | 962 | |
de103c93 | 963 | return 0; |
c66ac9db | 964 | fail: |
02b1a746 CH |
965 | while (*hbio) { |
966 | bio = *hbio; | |
967 | *hbio = (*hbio)->bi_next; | |
02b1a746 | 968 | bio_endio(bio, 0); /* XXX: should be error */ |
c66ac9db | 969 | } |
de103c93 | 970 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
971 | } |
972 | ||
3d6d7201 CH |
973 | /* |
974 | * Clear a lun set in the cdb if the initiator talking to use spoke | |
975 | * and old standards version, as we can't assume the underlying device | |
976 | * won't choke up on it. | |
977 | */ | |
978 | static inline void pscsi_clear_cdb_lun(unsigned char *cdb) | |
979 | { | |
980 | switch (cdb[0]) { | |
981 | case READ_10: /* SBC - RDProtect */ | |
982 | case READ_12: /* SBC - RDProtect */ | |
983 | case READ_16: /* SBC - RDProtect */ | |
984 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
985 | case VERIFY: /* SBC - VRProtect */ | |
986 | case VERIFY_16: /* SBC - VRProtect */ | |
987 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
988 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
989 | case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ | |
990 | break; | |
991 | default: | |
992 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
993 | break; | |
994 | } | |
995 | } | |
996 | ||
de103c93 CH |
997 | static sense_reason_t |
998 | pscsi_parse_cdb(struct se_cmd *cmd) | |
d6e0175c | 999 | { |
1fd032ee | 1000 | unsigned char *cdb = cmd->t_task_cdb; |
d6e0175c | 1001 | |
de103c93 CH |
1002 | if (cmd->se_cmd_flags & SCF_BIDI) |
1003 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
d6e0175c | 1004 | |
3d6d7201 CH |
1005 | pscsi_clear_cdb_lun(cdb); |
1006 | ||
d6e0175c | 1007 | /* |
a3785c87 NB |
1008 | * For REPORT LUNS we always need to emulate the response, for everything |
1009 | * else the default for pSCSI is to pass the command to the underlying | |
1010 | * LLD / physical hardware. | |
d6e0175c | 1011 | */ |
d6e0175c | 1012 | switch (cdb[0]) { |
1fd032ee | 1013 | case REPORT_LUNS: |
e6c4219b CH |
1014 | cmd->execute_cmd = spc_emulate_report_luns; |
1015 | return 0; | |
1fd032ee | 1016 | case READ_6: |
d6e0175c | 1017 | case READ_10: |
d6e0175c | 1018 | case READ_12: |
d6e0175c | 1019 | case READ_16: |
d6e0175c | 1020 | case WRITE_6: |
d6e0175c | 1021 | case WRITE_10: |
d6e0175c | 1022 | case WRITE_12: |
d6e0175c | 1023 | case WRITE_16: |
1fd032ee | 1024 | case WRITE_VERIFY: |
d6e0175c | 1025 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; |
0c2ad7d1 | 1026 | /* FALLTHROUGH*/ |
d6e0175c | 1027 | default: |
0c2ad7d1 | 1028 | cmd->execute_cmd = pscsi_execute_cmd; |
8de530a5 | 1029 | return 0; |
d6e0175c | 1030 | } |
d6e0175c CH |
1031 | } |
1032 | ||
de103c93 CH |
1033 | static sense_reason_t |
1034 | pscsi_execute_cmd(struct se_cmd *cmd) | |
c66ac9db | 1035 | { |
0c2ad7d1 CH |
1036 | struct scatterlist *sgl = cmd->t_data_sg; |
1037 | u32 sgl_nents = cmd->t_data_nents; | |
1038 | enum dma_data_direction data_direction = cmd->data_direction; | |
0fd97ccf | 1039 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
5787cacd | 1040 | struct pscsi_plugin_task *pt; |
02b1a746 CH |
1041 | struct request *req; |
1042 | struct bio *hbio; | |
de103c93 | 1043 | sense_reason_t ret; |
c66ac9db | 1044 | |
5787cacd CH |
1045 | /* |
1046 | * Dynamically alloc cdb space, since it may be larger than | |
1047 | * TCM_MAX_COMMAND_SIZE | |
1048 | */ | |
1049 | pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); | |
1050 | if (!pt) { | |
de103c93 | 1051 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
1052 | } |
1053 | cmd->priv = pt; | |
1054 | ||
ed3102c6 CH |
1055 | memcpy(pt->pscsi_cdb, cmd->t_task_cdb, |
1056 | scsi_command_size(cmd->t_task_cdb)); | |
485fd0d1 | 1057 | |
64f1db38 | 1058 | if (!sgl) { |
02b1a746 | 1059 | req = blk_get_request(pdv->pdv_sd->request_queue, |
5787cacd | 1060 | (data_direction == DMA_TO_DEVICE), |
02b1a746 | 1061 | GFP_KERNEL); |
a492f075 | 1062 | if (IS_ERR(req)) { |
fdb4c1f3 | 1063 | pr_err("PSCSI: blk_get_request() failed\n"); |
de103c93 | 1064 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd | 1065 | goto fail; |
02b1a746 | 1066 | } |
f27b087b JA |
1067 | |
1068 | blk_rq_set_block_pc(req); | |
02b1a746 | 1069 | } else { |
7a83aa4e | 1070 | BUG_ON(!cmd->data_length); |
c66ac9db | 1071 | |
5787cacd | 1072 | ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); |
de103c93 | 1073 | if (ret) |
5787cacd | 1074 | goto fail; |
02b1a746 CH |
1075 | |
1076 | req = blk_make_request(pdv->pdv_sd->request_queue, hbio, | |
1077 | GFP_KERNEL); | |
ed327ed3 | 1078 | if (IS_ERR(req)) { |
02b1a746 | 1079 | pr_err("pSCSI: blk_make_request() failed\n"); |
de103c93 | 1080 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd | 1081 | goto fail_free_bio; |
02b1a746 | 1082 | } |
c66ac9db NB |
1083 | } |
1084 | ||
02b1a746 | 1085 | req->end_io = pscsi_req_done; |
5787cacd | 1086 | req->end_io_data = cmd; |
02b1a746 CH |
1087 | req->cmd_len = scsi_command_size(pt->pscsi_cdb); |
1088 | req->cmd = &pt->pscsi_cdb[0]; | |
1089 | req->sense = &pt->pscsi_sense[0]; | |
1090 | req->sense_len = 0; | |
1091 | if (pdv->pdv_sd->type == TYPE_DISK) | |
1092 | req->timeout = PS_TIMEOUT_DISK; | |
1093 | else | |
1094 | req->timeout = PS_TIMEOUT_OTHER; | |
1095 | req->retries = PS_RETRY; | |
c66ac9db | 1096 | |
02b1a746 | 1097 | blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, |
68d81f40 | 1098 | (cmd->sam_task_attr == TCM_HEAD_TAG), |
02b1a746 CH |
1099 | pscsi_req_done); |
1100 | ||
03e98c9e | 1101 | return 0; |
02b1a746 | 1102 | |
5787cacd | 1103 | fail_free_bio: |
02b1a746 CH |
1104 | while (hbio) { |
1105 | struct bio *bio = hbio; | |
1106 | hbio = hbio->bi_next; | |
02b1a746 CH |
1107 | bio_endio(bio, 0); /* XXX: should be error */ |
1108 | } | |
de103c93 | 1109 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
1110 | fail: |
1111 | kfree(pt); | |
de103c93 | 1112 | return ret; |
c66ac9db NB |
1113 | } |
1114 | ||
c66ac9db NB |
1115 | /* pscsi_get_device_type(): |
1116 | * | |
1117 | * | |
1118 | */ | |
1119 | static u32 pscsi_get_device_type(struct se_device *dev) | |
1120 | { | |
0fd97ccf | 1121 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1122 | struct scsi_device *sd = pdv->pdv_sd; |
1123 | ||
215a8fe4 | 1124 | return (sd) ? sd->type : TYPE_NO_LUN; |
c66ac9db NB |
1125 | } |
1126 | ||
1127 | static sector_t pscsi_get_blocks(struct se_device *dev) | |
1128 | { | |
0fd97ccf | 1129 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1130 | |
1131 | if (pdv->pdv_bd && pdv->pdv_bd->bd_part) | |
1132 | return pdv->pdv_bd->bd_part->nr_sects; | |
1133 | ||
1134 | dump_stack(); | |
1135 | return 0; | |
1136 | } | |
1137 | ||
5787cacd | 1138 | static void pscsi_req_done(struct request *req, int uptodate) |
c66ac9db | 1139 | { |
5787cacd CH |
1140 | struct se_cmd *cmd = req->end_io_data; |
1141 | struct pscsi_plugin_task *pt = cmd->priv; | |
1142 | ||
1143 | pt->pscsi_result = req->errors; | |
1144 | pt->pscsi_resid = req->resid_len; | |
1145 | ||
1146 | cmd->scsi_status = status_byte(pt->pscsi_result) << 1; | |
1147 | if (cmd->scsi_status) { | |
1148 | pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" | |
1149 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db NB |
1150 | pt->pscsi_result); |
1151 | } | |
1152 | ||
1153 | switch (host_byte(pt->pscsi_result)) { | |
1154 | case DID_OK: | |
5787cacd | 1155 | target_complete_cmd(cmd, cmd->scsi_status); |
c66ac9db NB |
1156 | break; |
1157 | default: | |
5787cacd CH |
1158 | pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" |
1159 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db | 1160 | pt->pscsi_result); |
5787cacd | 1161 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
c66ac9db NB |
1162 | break; |
1163 | } | |
c66ac9db | 1164 | |
c66ac9db | 1165 | __blk_put_request(req->q, req); |
5787cacd | 1166 | kfree(pt); |
c66ac9db NB |
1167 | } |
1168 | ||
6cfb546b NB |
1169 | DEF_TB_DEV_ATTRIB_RO(pscsi, hw_pi_prot_type); |
1170 | TB_DEV_ATTR_RO(pscsi, hw_pi_prot_type); | |
1171 | ||
1172 | DEF_TB_DEV_ATTRIB_RO(pscsi, hw_block_size); | |
1173 | TB_DEV_ATTR_RO(pscsi, hw_block_size); | |
1174 | ||
1175 | DEF_TB_DEV_ATTRIB_RO(pscsi, hw_max_sectors); | |
1176 | TB_DEV_ATTR_RO(pscsi, hw_max_sectors); | |
1177 | ||
1178 | DEF_TB_DEV_ATTRIB_RO(pscsi, hw_queue_depth); | |
1179 | TB_DEV_ATTR_RO(pscsi, hw_queue_depth); | |
1180 | ||
1181 | static struct configfs_attribute *pscsi_backend_dev_attrs[] = { | |
1182 | &pscsi_dev_attrib_hw_pi_prot_type.attr, | |
1183 | &pscsi_dev_attrib_hw_block_size.attr, | |
1184 | &pscsi_dev_attrib_hw_max_sectors.attr, | |
1185 | &pscsi_dev_attrib_hw_queue_depth.attr, | |
1186 | NULL, | |
1187 | }; | |
1188 | ||
c66ac9db NB |
1189 | static struct se_subsystem_api pscsi_template = { |
1190 | .name = "pscsi", | |
1191 | .owner = THIS_MODULE, | |
1192 | .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, | |
c66ac9db NB |
1193 | .attach_hba = pscsi_attach_hba, |
1194 | .detach_hba = pscsi_detach_hba, | |
1195 | .pmode_enable_hba = pscsi_pmode_enable_hba, | |
0fd97ccf CH |
1196 | .alloc_device = pscsi_alloc_device, |
1197 | .configure_device = pscsi_configure_device, | |
c66ac9db NB |
1198 | .free_device = pscsi_free_device, |
1199 | .transport_complete = pscsi_transport_complete, | |
d6e0175c | 1200 | .parse_cdb = pscsi_parse_cdb, |
c66ac9db NB |
1201 | .set_configfs_dev_params = pscsi_set_configfs_dev_params, |
1202 | .show_configfs_dev_params = pscsi_show_configfs_dev_params, | |
c66ac9db NB |
1203 | .get_device_type = pscsi_get_device_type, |
1204 | .get_blocks = pscsi_get_blocks, | |
1205 | }; | |
1206 | ||
1207 | static int __init pscsi_module_init(void) | |
1208 | { | |
6cfb546b NB |
1209 | struct target_backend_cits *tbc = &pscsi_template.tb_cits; |
1210 | ||
1211 | target_core_setup_sub_cits(&pscsi_template); | |
1212 | tbc->tb_dev_attrib_cit.ct_attrs = pscsi_backend_dev_attrs; | |
1213 | ||
c66ac9db NB |
1214 | return transport_subsystem_register(&pscsi_template); |
1215 | } | |
1216 | ||
63b91d5a | 1217 | static void __exit pscsi_module_exit(void) |
c66ac9db NB |
1218 | { |
1219 | transport_subsystem_release(&pscsi_template); | |
1220 | } | |
1221 | ||
1222 | MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); | |
1223 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
1224 | MODULE_LICENSE("GPL"); | |
1225 | ||
1226 | module_init(pscsi_module_init); | |
1227 | module_exit(pscsi_module_exit); |