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 | * | |
fd9a11d7 | 6 | * (c) Copyright 2003-2012 RisingTide Systems LLC. |
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> |
c66ac9db | 47 | |
d6e0175c | 48 | #include "target_core_alua.h" |
c66ac9db NB |
49 | #include "target_core_pscsi.h" |
50 | ||
51 | #define ISPRINT(a) ((a >= ' ') && (a <= '~')) | |
52 | ||
0fd97ccf CH |
53 | static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) |
54 | { | |
55 | return container_of(dev, struct pscsi_dev_virt, dev); | |
56 | } | |
57 | ||
c66ac9db NB |
58 | static struct se_subsystem_api pscsi_template; |
59 | ||
de103c93 | 60 | static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd); |
c66ac9db NB |
61 | static void pscsi_req_done(struct request *, int); |
62 | ||
c66ac9db NB |
63 | /* pscsi_attach_hba(): |
64 | * | |
65 | * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. | |
66 | * from the passed SCSI Host ID. | |
67 | */ | |
68 | static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) | |
69 | { | |
c66ac9db NB |
70 | struct pscsi_hba_virt *phv; |
71 | ||
72 | phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); | |
6708bb27 AG |
73 | if (!phv) { |
74 | pr_err("Unable to allocate struct pscsi_hba_virt\n"); | |
e3d6f909 | 75 | return -ENOMEM; |
c66ac9db NB |
76 | } |
77 | phv->phv_host_id = host_id; | |
e6a8a41a | 78 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
c66ac9db | 79 | |
5951146d | 80 | hba->hba_ptr = phv; |
c66ac9db | 81 | |
6708bb27 | 82 | pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" |
c66ac9db NB |
83 | " Generic Target Core Stack %s\n", hba->hba_id, |
84 | PSCSI_VERSION, TARGET_CORE_MOD_VERSION); | |
6708bb27 | 85 | pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", |
e3d6f909 | 86 | hba->hba_id); |
c66ac9db NB |
87 | |
88 | return 0; | |
89 | } | |
90 | ||
91 | static void pscsi_detach_hba(struct se_hba *hba) | |
92 | { | |
93 | struct pscsi_hba_virt *phv = hba->hba_ptr; | |
94 | struct Scsi_Host *scsi_host = phv->phv_lld_host; | |
95 | ||
96 | if (scsi_host) { | |
97 | scsi_host_put(scsi_host); | |
98 | ||
6708bb27 | 99 | pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" |
c66ac9db NB |
100 | " Generic Target Core\n", hba->hba_id, |
101 | (scsi_host->hostt->name) ? (scsi_host->hostt->name) : | |
102 | "Unknown"); | |
103 | } else | |
6708bb27 | 104 | pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" |
c66ac9db NB |
105 | " from Generic Target Core\n", hba->hba_id); |
106 | ||
107 | kfree(phv); | |
108 | hba->hba_ptr = NULL; | |
109 | } | |
110 | ||
111 | static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) | |
112 | { | |
8359cf43 | 113 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
c66ac9db | 114 | struct Scsi_Host *sh = phv->phv_lld_host; |
c66ac9db NB |
115 | /* |
116 | * Release the struct Scsi_Host | |
117 | */ | |
6708bb27 AG |
118 | if (!mode_flag) { |
119 | if (!sh) | |
c66ac9db NB |
120 | return 0; |
121 | ||
122 | phv->phv_lld_host = NULL; | |
e6a8a41a | 123 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
c66ac9db | 124 | |
6708bb27 | 125 | pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" |
c66ac9db NB |
126 | " %s\n", hba->hba_id, (sh->hostt->name) ? |
127 | (sh->hostt->name) : "Unknown"); | |
128 | ||
129 | scsi_host_put(sh); | |
130 | return 0; | |
131 | } | |
132 | /* | |
133 | * Otherwise, locate struct Scsi_Host from the original passed | |
134 | * pSCSI Host ID and enable for phba mode | |
135 | */ | |
e3d6f909 AG |
136 | sh = scsi_host_lookup(phv->phv_host_id); |
137 | if (IS_ERR(sh)) { | |
6708bb27 | 138 | pr_err("pSCSI: Unable to locate SCSI Host for" |
c66ac9db | 139 | " phv_host_id: %d\n", phv->phv_host_id); |
e3d6f909 | 140 | return PTR_ERR(sh); |
c66ac9db | 141 | } |
c66ac9db NB |
142 | |
143 | phv->phv_lld_host = sh; | |
144 | phv->phv_mode = PHV_LLD_SCSI_HOST_NO; | |
145 | ||
6708bb27 | 146 | pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", |
c66ac9db NB |
147 | hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); |
148 | ||
149 | return 1; | |
150 | } | |
151 | ||
152 | static void pscsi_tape_read_blocksize(struct se_device *dev, | |
153 | struct scsi_device *sdev) | |
154 | { | |
155 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
156 | int ret; | |
157 | ||
158 | buf = kzalloc(12, GFP_KERNEL); | |
159 | if (!buf) | |
160 | return; | |
161 | ||
162 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
163 | cdb[0] = MODE_SENSE; | |
164 | cdb[4] = 0x0c; /* 12 bytes */ | |
165 | ||
166 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, | |
167 | HZ, 1, NULL); | |
168 | if (ret) | |
169 | goto out_free; | |
170 | ||
171 | /* | |
172 | * If MODE_SENSE still returns zero, set the default value to 1024. | |
173 | */ | |
174 | sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); | |
175 | if (!sdev->sector_size) | |
176 | sdev->sector_size = 1024; | |
177 | out_free: | |
178 | kfree(buf); | |
179 | } | |
180 | ||
181 | static void | |
182 | pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) | |
183 | { | |
184 | unsigned char *buf; | |
185 | ||
186 | if (sdev->inquiry_len < INQUIRY_LEN) | |
187 | return; | |
188 | ||
189 | buf = sdev->inquiry; | |
190 | if (!buf) | |
191 | return; | |
192 | /* | |
193 | * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() | |
194 | */ | |
195 | memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); | |
196 | memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); | |
197 | memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); | |
198 | } | |
199 | ||
200 | static int | |
201 | pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) | |
202 | { | |
203 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
204 | int ret; | |
205 | ||
206 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
207 | if (!buf) | |
e3d6f909 | 208 | return -ENOMEM; |
c66ac9db NB |
209 | |
210 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
211 | cdb[0] = INQUIRY; | |
212 | cdb[1] = 0x01; /* Query VPD */ | |
213 | cdb[2] = 0x80; /* Unit Serial Number */ | |
214 | cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; | |
215 | cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); | |
216 | ||
217 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
218 | INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); | |
219 | if (ret) | |
220 | goto out_free; | |
221 | ||
222 | snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); | |
223 | ||
0fd97ccf | 224 | wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; |
c66ac9db NB |
225 | |
226 | kfree(buf); | |
227 | return 0; | |
228 | ||
229 | out_free: | |
230 | kfree(buf); | |
e3d6f909 | 231 | return -EPERM; |
c66ac9db NB |
232 | } |
233 | ||
234 | static void | |
235 | pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, | |
236 | struct t10_wwn *wwn) | |
237 | { | |
238 | unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; | |
239 | int ident_len, page_len, off = 4, ret; | |
240 | struct t10_vpd *vpd; | |
241 | ||
242 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
243 | if (!buf) | |
244 | return; | |
245 | ||
246 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
247 | cdb[0] = INQUIRY; | |
248 | cdb[1] = 0x01; /* Query VPD */ | |
249 | cdb[2] = 0x83; /* Device Identifier */ | |
250 | cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; | |
251 | cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); | |
252 | ||
253 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
254 | INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, | |
255 | NULL, HZ, 1, NULL); | |
256 | if (ret) | |
257 | goto out; | |
258 | ||
259 | page_len = (buf[2] << 8) | buf[3]; | |
260 | while (page_len > 0) { | |
261 | /* Grab a pointer to the Identification descriptor */ | |
262 | page_83 = &buf[off]; | |
263 | ident_len = page_83[3]; | |
264 | if (!ident_len) { | |
6708bb27 | 265 | pr_err("page_83[3]: identifier" |
c66ac9db NB |
266 | " length zero!\n"); |
267 | break; | |
268 | } | |
35d1efe8 | 269 | pr_debug("T10 VPD Identifier Length: %d\n", ident_len); |
c66ac9db NB |
270 | |
271 | vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); | |
272 | if (!vpd) { | |
6708bb27 | 273 | pr_err("Unable to allocate memory for" |
c66ac9db NB |
274 | " struct t10_vpd\n"); |
275 | goto out; | |
276 | } | |
277 | INIT_LIST_HEAD(&vpd->vpd_list); | |
278 | ||
279 | transport_set_vpd_proto_id(vpd, page_83); | |
280 | transport_set_vpd_assoc(vpd, page_83); | |
281 | ||
282 | if (transport_set_vpd_ident_type(vpd, page_83) < 0) { | |
283 | off += (ident_len + 4); | |
284 | page_len -= (ident_len + 4); | |
285 | kfree(vpd); | |
286 | continue; | |
287 | } | |
288 | if (transport_set_vpd_ident(vpd, page_83) < 0) { | |
289 | off += (ident_len + 4); | |
290 | page_len -= (ident_len + 4); | |
291 | kfree(vpd); | |
292 | continue; | |
293 | } | |
294 | ||
295 | list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); | |
296 | off += (ident_len + 4); | |
297 | page_len -= (ident_len + 4); | |
298 | } | |
299 | ||
300 | out: | |
301 | kfree(buf); | |
302 | } | |
303 | ||
0fd97ccf CH |
304 | static int pscsi_add_device_to_list(struct se_device *dev, |
305 | struct scsi_device *sd) | |
c66ac9db | 306 | { |
0fd97ccf CH |
307 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
308 | struct request_queue *q = sd->request_queue; | |
c66ac9db | 309 | |
0fd97ccf | 310 | pdv->pdv_sd = sd; |
c66ac9db NB |
311 | |
312 | if (!sd->queue_depth) { | |
313 | sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; | |
314 | ||
6708bb27 | 315 | pr_err("Set broken SCSI Device %d:%d:%d" |
c66ac9db NB |
316 | " queue_depth to %d\n", sd->channel, sd->id, |
317 | sd->lun, sd->queue_depth); | |
318 | } | |
0fd97ccf CH |
319 | |
320 | dev->dev_attrib.hw_block_size = sd->sector_size; | |
321 | dev->dev_attrib.hw_max_sectors = | |
322 | min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); | |
323 | dev->dev_attrib.hw_queue_depth = sd->queue_depth; | |
324 | ||
c66ac9db NB |
325 | /* |
326 | * Setup our standard INQUIRY info into se_dev->t10_wwn | |
327 | */ | |
0fd97ccf | 328 | pscsi_set_inquiry_info(sd, &dev->t10_wwn); |
c66ac9db NB |
329 | |
330 | /* | |
331 | * Locate VPD WWN Information used for various purposes within | |
332 | * the Storage Engine. | |
333 | */ | |
0fd97ccf | 334 | if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { |
c66ac9db NB |
335 | /* |
336 | * If VPD Unit Serial returned GOOD status, try | |
337 | * VPD Device Identification page (0x83). | |
338 | */ | |
0fd97ccf | 339 | pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); |
c66ac9db NB |
340 | } |
341 | ||
342 | /* | |
343 | * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. | |
344 | */ | |
345 | if (sd->type == TYPE_TAPE) | |
346 | pscsi_tape_read_blocksize(dev, sd); | |
0fd97ccf | 347 | return 0; |
c66ac9db NB |
348 | } |
349 | ||
0fd97ccf CH |
350 | static struct se_device *pscsi_alloc_device(struct se_hba *hba, |
351 | const char *name) | |
c66ac9db NB |
352 | { |
353 | struct pscsi_dev_virt *pdv; | |
354 | ||
355 | pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); | |
6708bb27 AG |
356 | if (!pdv) { |
357 | pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); | |
c66ac9db NB |
358 | return NULL; |
359 | } | |
c66ac9db | 360 | |
6708bb27 | 361 | pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); |
0fd97ccf | 362 | return &pdv->dev; |
c66ac9db NB |
363 | } |
364 | ||
365 | /* | |
366 | * Called with struct Scsi_Host->host_lock called. | |
367 | */ | |
0fd97ccf | 368 | static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) |
5dd7ed2e | 369 | __releases(sh->host_lock) |
c66ac9db | 370 | { |
0fd97ccf CH |
371 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
372 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
373 | struct Scsi_Host *sh = sd->host; |
374 | struct block_device *bd; | |
0fd97ccf | 375 | int ret; |
c66ac9db NB |
376 | |
377 | if (scsi_device_get(sd)) { | |
6708bb27 | 378 | pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", |
c66ac9db NB |
379 | sh->host_no, sd->channel, sd->id, sd->lun); |
380 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf | 381 | return -EIO; |
c66ac9db NB |
382 | } |
383 | spin_unlock_irq(sh->host_lock); | |
384 | /* | |
385 | * Claim exclusive struct block_device access to struct scsi_device | |
386 | * for TYPE_DISK using supplied udev_path | |
387 | */ | |
0fd97ccf | 388 | bd = blkdev_get_by_path(dev->udev_path, |
c66ac9db | 389 | FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); |
3ae279d2 | 390 | if (IS_ERR(bd)) { |
6708bb27 | 391 | pr_err("pSCSI: blkdev_get_by_path() failed\n"); |
c66ac9db | 392 | scsi_device_put(sd); |
0fd97ccf | 393 | return PTR_ERR(bd); |
c66ac9db NB |
394 | } |
395 | pdv->pdv_bd = bd; | |
396 | ||
0fd97ccf CH |
397 | ret = pscsi_add_device_to_list(dev, sd); |
398 | if (ret) { | |
c66ac9db NB |
399 | blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
400 | scsi_device_put(sd); | |
0fd97ccf | 401 | return ret; |
c66ac9db | 402 | } |
0fd97ccf | 403 | |
6708bb27 | 404 | pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", |
c66ac9db | 405 | phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); |
0fd97ccf | 406 | return 0; |
c66ac9db NB |
407 | } |
408 | ||
409 | /* | |
410 | * Called with struct Scsi_Host->host_lock called. | |
411 | */ | |
0fd97ccf | 412 | static int pscsi_create_type_rom(struct se_device *dev, struct scsi_device *sd) |
5dd7ed2e | 413 | __releases(sh->host_lock) |
c66ac9db | 414 | { |
0fd97ccf | 415 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db | 416 | struct Scsi_Host *sh = sd->host; |
0fd97ccf | 417 | int ret; |
c66ac9db NB |
418 | |
419 | if (scsi_device_get(sd)) { | |
6708bb27 | 420 | pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", |
c66ac9db NB |
421 | sh->host_no, sd->channel, sd->id, sd->lun); |
422 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf | 423 | return -EIO; |
c66ac9db NB |
424 | } |
425 | spin_unlock_irq(sh->host_lock); | |
426 | ||
0fd97ccf CH |
427 | ret = pscsi_add_device_to_list(dev, sd); |
428 | if (ret) { | |
c66ac9db | 429 | scsi_device_put(sd); |
0fd97ccf | 430 | return ret; |
c66ac9db | 431 | } |
6708bb27 | 432 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", |
c66ac9db NB |
433 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
434 | sd->channel, sd->id, sd->lun); | |
435 | ||
0fd97ccf | 436 | return 0; |
c66ac9db NB |
437 | } |
438 | ||
439 | /* | |
0fd97ccf | 440 | * Called with struct Scsi_Host->host_lock called. |
c66ac9db | 441 | */ |
0fd97ccf CH |
442 | static int pscsi_create_type_other(struct se_device *dev, |
443 | struct scsi_device *sd) | |
5dd7ed2e | 444 | __releases(sh->host_lock) |
c66ac9db | 445 | { |
0fd97ccf | 446 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db | 447 | struct Scsi_Host *sh = sd->host; |
0fd97ccf | 448 | int ret; |
c66ac9db NB |
449 | |
450 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf CH |
451 | ret = pscsi_add_device_to_list(dev, sd); |
452 | if (ret) | |
453 | return ret; | |
c66ac9db | 454 | |
6708bb27 | 455 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", |
c66ac9db NB |
456 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
457 | sd->channel, sd->id, sd->lun); | |
0fd97ccf | 458 | return 0; |
c66ac9db NB |
459 | } |
460 | ||
ecf0dd66 | 461 | static int pscsi_configure_device(struct se_device *dev) |
c66ac9db | 462 | { |
0fd97ccf CH |
463 | struct se_hba *hba = dev->se_hba; |
464 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db | 465 | struct scsi_device *sd; |
0fd97ccf | 466 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db NB |
467 | struct Scsi_Host *sh = phv->phv_lld_host; |
468 | int legacy_mode_enable = 0; | |
0fd97ccf | 469 | int ret; |
c66ac9db | 470 | |
0fd97ccf CH |
471 | if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || |
472 | !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || | |
473 | !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { | |
474 | pr_err("Missing scsi_channel_id=, scsi_target_id= and" | |
475 | " scsi_lun_id= parameters\n"); | |
476 | return -EINVAL; | |
c66ac9db | 477 | } |
0fd97ccf | 478 | |
c66ac9db NB |
479 | /* |
480 | * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the | |
481 | * struct Scsi_Host we will need to bring the TCM/pSCSI object online | |
482 | */ | |
6708bb27 | 483 | if (!sh) { |
c66ac9db | 484 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
6708bb27 | 485 | pr_err("pSCSI: Unable to locate struct" |
c66ac9db | 486 | " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); |
0fd97ccf | 487 | return -ENODEV; |
c66ac9db NB |
488 | } |
489 | /* | |
e6a8a41a | 490 | * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device |
c66ac9db NB |
491 | * reference, we enforce that udev_path has been set |
492 | */ | |
0fd97ccf | 493 | if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { |
6708bb27 | 494 | pr_err("pSCSI: udev_path attribute has not" |
c66ac9db | 495 | " been set before ENABLE=1\n"); |
0fd97ccf | 496 | return -EINVAL; |
c66ac9db NB |
497 | } |
498 | /* | |
e6a8a41a | 499 | * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, |
c66ac9db NB |
500 | * use the original TCM hba ID to reference Linux/SCSI Host No |
501 | * and enable for PHV_LLD_SCSI_HOST_NO mode. | |
502 | */ | |
503 | if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { | |
0fd97ccf | 504 | if (hba->dev_count) { |
6708bb27 | 505 | pr_err("pSCSI: Unable to set hba_mode" |
c66ac9db | 506 | " with active devices\n"); |
0fd97ccf | 507 | return -EEXIST; |
c66ac9db | 508 | } |
c66ac9db NB |
509 | |
510 | if (pscsi_pmode_enable_hba(hba, 1) != 1) | |
0fd97ccf | 511 | return -ENODEV; |
c66ac9db NB |
512 | |
513 | legacy_mode_enable = 1; | |
514 | hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; | |
515 | sh = phv->phv_lld_host; | |
516 | } else { | |
e3d6f909 AG |
517 | sh = scsi_host_lookup(pdv->pdv_host_id); |
518 | if (IS_ERR(sh)) { | |
6708bb27 | 519 | pr_err("pSCSI: Unable to locate" |
c66ac9db | 520 | " pdv_host_id: %d\n", pdv->pdv_host_id); |
0fd97ccf | 521 | return PTR_ERR(sh); |
c66ac9db NB |
522 | } |
523 | } | |
524 | } else { | |
e6a8a41a SH |
525 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { |
526 | pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" | |
c66ac9db | 527 | " struct Scsi_Host exists\n"); |
0fd97ccf | 528 | return -EEXIST; |
c66ac9db NB |
529 | } |
530 | } | |
531 | ||
532 | spin_lock_irq(sh->host_lock); | |
533 | list_for_each_entry(sd, &sh->__devices, siblings) { | |
534 | if ((pdv->pdv_channel_id != sd->channel) || | |
535 | (pdv->pdv_target_id != sd->id) || | |
536 | (pdv->pdv_lun_id != sd->lun)) | |
537 | continue; | |
538 | /* | |
539 | * Functions will release the held struct scsi_host->host_lock | |
540 | * before calling calling pscsi_add_device_to_list() to register | |
541 | * struct scsi_device with target_core_mod. | |
542 | */ | |
543 | switch (sd->type) { | |
544 | case TYPE_DISK: | |
0fd97ccf | 545 | ret = pscsi_create_type_disk(dev, sd); |
c66ac9db NB |
546 | break; |
547 | case TYPE_ROM: | |
0fd97ccf | 548 | ret = pscsi_create_type_rom(dev, sd); |
c66ac9db NB |
549 | break; |
550 | default: | |
0fd97ccf | 551 | ret = pscsi_create_type_other(dev, sd); |
c66ac9db NB |
552 | break; |
553 | } | |
554 | ||
0fd97ccf | 555 | if (ret) { |
e6a8a41a | 556 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
557 | scsi_host_put(sh); |
558 | else if (legacy_mode_enable) { | |
559 | pscsi_pmode_enable_hba(hba, 0); | |
560 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
561 | } | |
562 | pdv->pdv_sd = NULL; | |
0fd97ccf | 563 | return ret; |
c66ac9db | 564 | } |
0fd97ccf | 565 | return 0; |
c66ac9db NB |
566 | } |
567 | spin_unlock_irq(sh->host_lock); | |
568 | ||
6708bb27 | 569 | pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, |
c66ac9db NB |
570 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); |
571 | ||
e6a8a41a | 572 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
573 | scsi_host_put(sh); |
574 | else if (legacy_mode_enable) { | |
575 | pscsi_pmode_enable_hba(hba, 0); | |
576 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
577 | } | |
578 | ||
0fd97ccf | 579 | return -ENODEV; |
c66ac9db NB |
580 | } |
581 | ||
0fd97ccf | 582 | static void pscsi_free_device(struct se_device *dev) |
c66ac9db | 583 | { |
0fd97ccf CH |
584 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
585 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
586 | struct scsi_device *sd = pdv->pdv_sd; |
587 | ||
588 | if (sd) { | |
589 | /* | |
590 | * Release exclusive pSCSI internal struct block_device claim for | |
591 | * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() | |
592 | */ | |
593 | if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { | |
594 | blkdev_put(pdv->pdv_bd, | |
595 | FMODE_WRITE|FMODE_READ|FMODE_EXCL); | |
596 | pdv->pdv_bd = NULL; | |
597 | } | |
598 | /* | |
599 | * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference | |
600 | * to struct Scsi_Host now. | |
601 | */ | |
602 | if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && | |
603 | (phv->phv_lld_host != NULL)) | |
604 | scsi_host_put(phv->phv_lld_host); | |
605 | ||
606 | if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) | |
607 | scsi_device_put(sd); | |
608 | ||
609 | pdv->pdv_sd = NULL; | |
610 | } | |
611 | ||
612 | kfree(pdv); | |
613 | } | |
614 | ||
d5829eac PB |
615 | static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, |
616 | unsigned char *sense_buffer) | |
c66ac9db | 617 | { |
0fd97ccf | 618 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
c66ac9db NB |
619 | struct scsi_device *sd = pdv->pdv_sd; |
620 | int result; | |
5787cacd | 621 | struct pscsi_plugin_task *pt = cmd->priv; |
1d2a2cd9 NB |
622 | unsigned char *cdb; |
623 | /* | |
624 | * Special case for REPORT_LUNs handling where pscsi_plugin_task has | |
625 | * not been allocated because TCM is handling the emulation directly. | |
626 | */ | |
627 | if (!pt) | |
d5829eac | 628 | return; |
c66ac9db | 629 | |
1d2a2cd9 | 630 | cdb = &pt->pscsi_cdb[0]; |
c66ac9db NB |
631 | result = pt->pscsi_result; |
632 | /* | |
633 | * Hack to make sure that Write-Protect modepage is set if R/O mode is | |
634 | * forced. | |
635 | */ | |
306c11b2 PB |
636 | if (!cmd->se_deve || !cmd->data_length) |
637 | goto after_mode_sense; | |
638 | ||
c66ac9db NB |
639 | if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && |
640 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
5787cacd | 641 | if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { |
de103c93 CH |
642 | unsigned char *buf; |
643 | ||
644 | buf = transport_kmap_data_sg(cmd); | |
645 | if (!buf) | |
646 | ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */ | |
c66ac9db NB |
647 | |
648 | if (cdb[0] == MODE_SENSE_10) { | |
649 | if (!(buf[3] & 0x80)) | |
650 | buf[3] |= 0x80; | |
651 | } else { | |
652 | if (!(buf[2] & 0x80)) | |
653 | buf[2] |= 0x80; | |
654 | } | |
05d1c7c0 | 655 | |
5787cacd | 656 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
657 | } |
658 | } | |
659 | after_mode_sense: | |
660 | ||
306c11b2 | 661 | if (sd->type != TYPE_TAPE || !cmd->data_length) |
c66ac9db NB |
662 | goto after_mode_select; |
663 | ||
664 | /* | |
665 | * Hack to correctly obtain the initiator requested blocksize for | |
666 | * TYPE_TAPE. Since this value is dependent upon each tape media, | |
667 | * struct scsi_device->sector_size will not contain the correct value | |
668 | * by default, so we go ahead and set it so | |
669 | * TRANSPORT(dev)->get_blockdev() returns the correct value to the | |
670 | * storage engine. | |
671 | */ | |
672 | if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && | |
673 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
674 | unsigned char *buf; | |
c66ac9db NB |
675 | u16 bdl; |
676 | u32 blocksize; | |
677 | ||
678 | buf = sg_virt(&sg[0]); | |
6708bb27 AG |
679 | if (!buf) { |
680 | pr_err("Unable to get buf for scatterlist\n"); | |
c66ac9db NB |
681 | goto after_mode_select; |
682 | } | |
683 | ||
684 | if (cdb[0] == MODE_SELECT) | |
685 | bdl = (buf[3]); | |
686 | else | |
687 | bdl = (buf[6] << 8) | (buf[7]); | |
688 | ||
689 | if (!bdl) | |
690 | goto after_mode_select; | |
691 | ||
692 | if (cdb[0] == MODE_SELECT) | |
693 | blocksize = (buf[9] << 16) | (buf[10] << 8) | | |
694 | (buf[11]); | |
695 | else | |
696 | blocksize = (buf[13] << 16) | (buf[14] << 8) | | |
697 | (buf[15]); | |
698 | ||
699 | sd->sector_size = blocksize; | |
700 | } | |
701 | after_mode_select: | |
702 | ||
d5829eac PB |
703 | if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { |
704 | memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); | |
705 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
706 | } | |
c66ac9db NB |
707 | } |
708 | ||
c66ac9db NB |
709 | enum { |
710 | Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, | |
711 | Opt_scsi_lun_id, Opt_err | |
712 | }; | |
713 | ||
714 | static match_table_t tokens = { | |
715 | {Opt_scsi_host_id, "scsi_host_id=%d"}, | |
716 | {Opt_scsi_channel_id, "scsi_channel_id=%d"}, | |
717 | {Opt_scsi_target_id, "scsi_target_id=%d"}, | |
718 | {Opt_scsi_lun_id, "scsi_lun_id=%d"}, | |
719 | {Opt_err, NULL} | |
720 | }; | |
721 | ||
0fd97ccf CH |
722 | static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, |
723 | const char *page, ssize_t count) | |
c66ac9db | 724 | { |
0fd97ccf CH |
725 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
726 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
727 | char *orig, *ptr, *opts; |
728 | substring_t args[MAX_OPT_ARGS]; | |
729 | int ret = 0, arg, token; | |
730 | ||
731 | opts = kstrdup(page, GFP_KERNEL); | |
732 | if (!opts) | |
733 | return -ENOMEM; | |
734 | ||
735 | orig = opts; | |
736 | ||
90c161b6 | 737 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
738 | if (!*ptr) |
739 | continue; | |
740 | ||
741 | token = match_token(ptr, tokens, args); | |
742 | switch (token) { | |
743 | case Opt_scsi_host_id: | |
744 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { | |
6708bb27 | 745 | pr_err("PSCSI[%d]: Unable to accept" |
c66ac9db NB |
746 | " scsi_host_id while phv_mode ==" |
747 | " PHV_LLD_SCSI_HOST_NO\n", | |
748 | phv->phv_host_id); | |
749 | ret = -EINVAL; | |
750 | goto out; | |
751 | } | |
752 | match_int(args, &arg); | |
753 | pdv->pdv_host_id = arg; | |
6708bb27 | 754 | pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" |
c66ac9db NB |
755 | " %d\n", phv->phv_host_id, pdv->pdv_host_id); |
756 | pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; | |
757 | break; | |
758 | case Opt_scsi_channel_id: | |
759 | match_int(args, &arg); | |
760 | pdv->pdv_channel_id = arg; | |
6708bb27 | 761 | pr_debug("PSCSI[%d]: Referencing SCSI Channel" |
c66ac9db NB |
762 | " ID: %d\n", phv->phv_host_id, |
763 | pdv->pdv_channel_id); | |
764 | pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; | |
765 | break; | |
766 | case Opt_scsi_target_id: | |
767 | match_int(args, &arg); | |
768 | pdv->pdv_target_id = arg; | |
6708bb27 | 769 | pr_debug("PSCSI[%d]: Referencing SCSI Target" |
c66ac9db NB |
770 | " ID: %d\n", phv->phv_host_id, |
771 | pdv->pdv_target_id); | |
772 | pdv->pdv_flags |= PDF_HAS_TARGET_ID; | |
773 | break; | |
774 | case Opt_scsi_lun_id: | |
775 | match_int(args, &arg); | |
776 | pdv->pdv_lun_id = arg; | |
6708bb27 | 777 | pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" |
c66ac9db NB |
778 | " %d\n", phv->phv_host_id, pdv->pdv_lun_id); |
779 | pdv->pdv_flags |= PDF_HAS_LUN_ID; | |
780 | break; | |
781 | default: | |
782 | break; | |
783 | } | |
784 | } | |
785 | ||
786 | out: | |
787 | kfree(orig); | |
788 | return (!ret) ? count : ret; | |
789 | } | |
790 | ||
0fd97ccf | 791 | static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 792 | { |
0fd97ccf CH |
793 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
794 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
795 | struct scsi_device *sd = pdv->pdv_sd; |
796 | unsigned char host_id[16]; | |
797 | ssize_t bl; | |
798 | int i; | |
799 | ||
e6a8a41a | 800 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
801 | snprintf(host_id, 16, "%d", pdv->pdv_host_id); |
802 | else | |
803 | snprintf(host_id, 16, "PHBA Mode"); | |
804 | ||
805 | bl = sprintf(b, "SCSI Device Bus Location:" | |
806 | " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", | |
807 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, | |
808 | host_id); | |
809 | ||
810 | if (sd) { | |
811 | bl += sprintf(b + bl, " "); | |
812 | bl += sprintf(b + bl, "Vendor: "); | |
813 | for (i = 0; i < 8; i++) { | |
814 | if (ISPRINT(sd->vendor[i])) /* printable character? */ | |
815 | bl += sprintf(b + bl, "%c", sd->vendor[i]); | |
816 | else | |
817 | bl += sprintf(b + bl, " "); | |
818 | } | |
819 | bl += sprintf(b + bl, " Model: "); | |
820 | for (i = 0; i < 16; i++) { | |
821 | if (ISPRINT(sd->model[i])) /* printable character ? */ | |
822 | bl += sprintf(b + bl, "%c", sd->model[i]); | |
823 | else | |
824 | bl += sprintf(b + bl, " "); | |
825 | } | |
826 | bl += sprintf(b + bl, " Rev: "); | |
827 | for (i = 0; i < 4; i++) { | |
828 | if (ISPRINT(sd->rev[i])) /* printable character ? */ | |
829 | bl += sprintf(b + bl, "%c", sd->rev[i]); | |
830 | else | |
831 | bl += sprintf(b + bl, " "); | |
832 | } | |
833 | bl += sprintf(b + bl, "\n"); | |
834 | } | |
835 | return bl; | |
836 | } | |
837 | ||
838 | static void pscsi_bi_endio(struct bio *bio, int error) | |
839 | { | |
840 | bio_put(bio); | |
841 | } | |
842 | ||
2dbe10a2 | 843 | static inline struct bio *pscsi_get_bio(int nr_vecs) |
c66ac9db NB |
844 | { |
845 | struct bio *bio; | |
846 | /* | |
847 | * Use bio_malloc() following the comment in for bio -> struct request | |
848 | * in block/blk-core.c:blk_make_request() | |
849 | */ | |
2dbe10a2 | 850 | bio = bio_kmalloc(GFP_KERNEL, nr_vecs); |
6708bb27 AG |
851 | if (!bio) { |
852 | pr_err("PSCSI: bio_kmalloc() failed\n"); | |
c66ac9db NB |
853 | return NULL; |
854 | } | |
855 | bio->bi_end_io = pscsi_bi_endio; | |
856 | ||
857 | return bio; | |
858 | } | |
859 | ||
de103c93 CH |
860 | static sense_reason_t |
861 | pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, | |
862 | enum dma_data_direction data_direction, struct bio **hbio) | |
c66ac9db | 863 | { |
0fd97ccf | 864 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
02b1a746 | 865 | struct bio *bio = NULL, *tbio = NULL; |
c66ac9db NB |
866 | struct page *page; |
867 | struct scatterlist *sg; | |
7a83aa4e | 868 | u32 data_len = cmd->data_length, i, len, bytes, off; |
5787cacd | 869 | int nr_pages = (cmd->data_length + sgl[0].offset + |
c66ac9db | 870 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
03e98c9e | 871 | int nr_vecs = 0, rc; |
5787cacd | 872 | int rw = (data_direction == DMA_TO_DEVICE); |
c66ac9db | 873 | |
02b1a746 CH |
874 | *hbio = NULL; |
875 | ||
6708bb27 | 876 | pr_debug("PSCSI: nr_pages: %d\n", nr_pages); |
c66ac9db | 877 | |
5787cacd | 878 | for_each_sg(sgl, sg, sgl_nents, i) { |
c66ac9db NB |
879 | page = sg_page(sg); |
880 | off = sg->offset; | |
881 | len = sg->length; | |
882 | ||
6708bb27 | 883 | pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, |
c66ac9db NB |
884 | page, len, off); |
885 | ||
886 | while (len > 0 && data_len > 0) { | |
887 | bytes = min_t(unsigned int, len, PAGE_SIZE - off); | |
888 | bytes = min(bytes, data_len); | |
889 | ||
6708bb27 | 890 | if (!bio) { |
c66ac9db NB |
891 | nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); |
892 | nr_pages -= nr_vecs; | |
893 | /* | |
894 | * Calls bio_kmalloc() and sets bio->bi_end_io() | |
895 | */ | |
a1d8b49a | 896 | bio = pscsi_get_bio(nr_vecs); |
6708bb27 | 897 | if (!bio) |
c66ac9db NB |
898 | goto fail; |
899 | ||
900 | if (rw) | |
901 | bio->bi_rw |= REQ_WRITE; | |
902 | ||
6708bb27 | 903 | pr_debug("PSCSI: Allocated bio: %p," |
c66ac9db NB |
904 | " dir: %s nr_vecs: %d\n", bio, |
905 | (rw) ? "rw" : "r", nr_vecs); | |
906 | /* | |
907 | * Set *hbio pointer to handle the case: | |
908 | * nr_pages > BIO_MAX_PAGES, where additional | |
909 | * bios need to be added to complete a given | |
5787cacd | 910 | * command. |
c66ac9db | 911 | */ |
02b1a746 CH |
912 | if (!*hbio) |
913 | *hbio = tbio = bio; | |
c66ac9db NB |
914 | else |
915 | tbio = tbio->bi_next = bio; | |
916 | } | |
917 | ||
6708bb27 | 918 | pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" |
c66ac9db NB |
919 | " bio: %p page: %p len: %d off: %d\n", i, bio, |
920 | page, len, off); | |
921 | ||
922 | rc = bio_add_pc_page(pdv->pdv_sd->request_queue, | |
923 | bio, page, bytes, off); | |
924 | if (rc != bytes) | |
925 | goto fail; | |
926 | ||
6708bb27 | 927 | pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", |
c66ac9db NB |
928 | bio->bi_vcnt, nr_vecs); |
929 | ||
930 | if (bio->bi_vcnt > nr_vecs) { | |
6708bb27 | 931 | pr_debug("PSCSI: Reached bio->bi_vcnt max:" |
c66ac9db NB |
932 | " %d i: %d bio: %p, allocating another" |
933 | " bio\n", bio->bi_vcnt, i, bio); | |
934 | /* | |
935 | * Clear the pointer so that another bio will | |
936 | * be allocated with pscsi_get_bio() above, the | |
937 | * current bio has already been set *tbio and | |
938 | * bio->bi_next. | |
939 | */ | |
940 | bio = NULL; | |
941 | } | |
942 | ||
c66ac9db NB |
943 | len -= bytes; |
944 | data_len -= bytes; | |
945 | off = 0; | |
946 | } | |
947 | } | |
c66ac9db | 948 | |
de103c93 | 949 | return 0; |
c66ac9db | 950 | fail: |
02b1a746 CH |
951 | while (*hbio) { |
952 | bio = *hbio; | |
953 | *hbio = (*hbio)->bi_next; | |
02b1a746 | 954 | bio_endio(bio, 0); /* XXX: should be error */ |
c66ac9db | 955 | } |
de103c93 | 956 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
957 | } |
958 | ||
3d6d7201 CH |
959 | /* |
960 | * Clear a lun set in the cdb if the initiator talking to use spoke | |
961 | * and old standards version, as we can't assume the underlying device | |
962 | * won't choke up on it. | |
963 | */ | |
964 | static inline void pscsi_clear_cdb_lun(unsigned char *cdb) | |
965 | { | |
966 | switch (cdb[0]) { | |
967 | case READ_10: /* SBC - RDProtect */ | |
968 | case READ_12: /* SBC - RDProtect */ | |
969 | case READ_16: /* SBC - RDProtect */ | |
970 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
971 | case VERIFY: /* SBC - VRProtect */ | |
972 | case VERIFY_16: /* SBC - VRProtect */ | |
973 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
974 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
975 | case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ | |
976 | break; | |
977 | default: | |
978 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
979 | break; | |
980 | } | |
981 | } | |
982 | ||
de103c93 CH |
983 | static sense_reason_t |
984 | pscsi_parse_cdb(struct se_cmd *cmd) | |
d6e0175c | 985 | { |
1fd032ee | 986 | unsigned char *cdb = cmd->t_task_cdb; |
d6e0175c | 987 | |
de103c93 CH |
988 | if (cmd->se_cmd_flags & SCF_BIDI) |
989 | return TCM_UNSUPPORTED_SCSI_OPCODE; | |
d6e0175c | 990 | |
3d6d7201 CH |
991 | pscsi_clear_cdb_lun(cdb); |
992 | ||
d6e0175c | 993 | /* |
a3785c87 NB |
994 | * For REPORT LUNS we always need to emulate the response, for everything |
995 | * else the default for pSCSI is to pass the command to the underlying | |
996 | * LLD / physical hardware. | |
d6e0175c | 997 | */ |
d6e0175c | 998 | switch (cdb[0]) { |
1fd032ee | 999 | case REPORT_LUNS: |
e6c4219b CH |
1000 | cmd->execute_cmd = spc_emulate_report_luns; |
1001 | return 0; | |
1fd032ee | 1002 | case READ_6: |
d6e0175c | 1003 | case READ_10: |
d6e0175c | 1004 | case READ_12: |
d6e0175c | 1005 | case READ_16: |
d6e0175c | 1006 | case WRITE_6: |
d6e0175c | 1007 | case WRITE_10: |
d6e0175c | 1008 | case WRITE_12: |
d6e0175c | 1009 | case WRITE_16: |
1fd032ee | 1010 | case WRITE_VERIFY: |
d6e0175c | 1011 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; |
0c2ad7d1 | 1012 | /* FALLTHROUGH*/ |
d6e0175c | 1013 | default: |
0c2ad7d1 | 1014 | cmd->execute_cmd = pscsi_execute_cmd; |
8de530a5 | 1015 | return 0; |
d6e0175c | 1016 | } |
d6e0175c CH |
1017 | } |
1018 | ||
de103c93 CH |
1019 | static sense_reason_t |
1020 | pscsi_execute_cmd(struct se_cmd *cmd) | |
c66ac9db | 1021 | { |
0c2ad7d1 CH |
1022 | struct scatterlist *sgl = cmd->t_data_sg; |
1023 | u32 sgl_nents = cmd->t_data_nents; | |
1024 | enum dma_data_direction data_direction = cmd->data_direction; | |
0fd97ccf | 1025 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
5787cacd | 1026 | struct pscsi_plugin_task *pt; |
02b1a746 CH |
1027 | struct request *req; |
1028 | struct bio *hbio; | |
de103c93 | 1029 | sense_reason_t ret; |
c66ac9db | 1030 | |
5787cacd CH |
1031 | /* |
1032 | * Dynamically alloc cdb space, since it may be larger than | |
1033 | * TCM_MAX_COMMAND_SIZE | |
1034 | */ | |
1035 | pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); | |
1036 | if (!pt) { | |
de103c93 | 1037 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
1038 | } |
1039 | cmd->priv = pt; | |
1040 | ||
ed3102c6 CH |
1041 | memcpy(pt->pscsi_cdb, cmd->t_task_cdb, |
1042 | scsi_command_size(cmd->t_task_cdb)); | |
485fd0d1 | 1043 | |
64f1db38 | 1044 | if (!sgl) { |
02b1a746 | 1045 | req = blk_get_request(pdv->pdv_sd->request_queue, |
5787cacd | 1046 | (data_direction == DMA_TO_DEVICE), |
02b1a746 CH |
1047 | GFP_KERNEL); |
1048 | if (!req || IS_ERR(req)) { | |
1049 | pr_err("PSCSI: blk_get_request() failed: %ld\n", | |
1050 | req ? IS_ERR(req) : -ENOMEM); | |
de103c93 | 1051 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd | 1052 | goto fail; |
02b1a746 CH |
1053 | } |
1054 | } else { | |
7a83aa4e | 1055 | BUG_ON(!cmd->data_length); |
c66ac9db | 1056 | |
5787cacd | 1057 | ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); |
de103c93 | 1058 | if (ret) |
5787cacd | 1059 | goto fail; |
02b1a746 CH |
1060 | |
1061 | req = blk_make_request(pdv->pdv_sd->request_queue, hbio, | |
1062 | GFP_KERNEL); | |
ed327ed3 | 1063 | if (IS_ERR(req)) { |
02b1a746 | 1064 | pr_err("pSCSI: blk_make_request() failed\n"); |
de103c93 | 1065 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd | 1066 | goto fail_free_bio; |
02b1a746 | 1067 | } |
c66ac9db NB |
1068 | } |
1069 | ||
02b1a746 CH |
1070 | req->cmd_type = REQ_TYPE_BLOCK_PC; |
1071 | req->end_io = pscsi_req_done; | |
5787cacd | 1072 | req->end_io_data = cmd; |
02b1a746 CH |
1073 | req->cmd_len = scsi_command_size(pt->pscsi_cdb); |
1074 | req->cmd = &pt->pscsi_cdb[0]; | |
1075 | req->sense = &pt->pscsi_sense[0]; | |
1076 | req->sense_len = 0; | |
1077 | if (pdv->pdv_sd->type == TYPE_DISK) | |
1078 | req->timeout = PS_TIMEOUT_DISK; | |
1079 | else | |
1080 | req->timeout = PS_TIMEOUT_OTHER; | |
1081 | req->retries = PS_RETRY; | |
c66ac9db | 1082 | |
02b1a746 | 1083 | blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, |
5787cacd | 1084 | (cmd->sam_task_attr == MSG_HEAD_TAG), |
02b1a746 CH |
1085 | pscsi_req_done); |
1086 | ||
03e98c9e | 1087 | return 0; |
02b1a746 | 1088 | |
5787cacd | 1089 | fail_free_bio: |
02b1a746 CH |
1090 | while (hbio) { |
1091 | struct bio *bio = hbio; | |
1092 | hbio = hbio->bi_next; | |
02b1a746 CH |
1093 | bio_endio(bio, 0); /* XXX: should be error */ |
1094 | } | |
de103c93 | 1095 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
1096 | fail: |
1097 | kfree(pt); | |
de103c93 | 1098 | return ret; |
c66ac9db NB |
1099 | } |
1100 | ||
c66ac9db NB |
1101 | /* pscsi_get_device_type(): |
1102 | * | |
1103 | * | |
1104 | */ | |
1105 | static u32 pscsi_get_device_type(struct se_device *dev) | |
1106 | { | |
0fd97ccf | 1107 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1108 | struct scsi_device *sd = pdv->pdv_sd; |
1109 | ||
1110 | return sd->type; | |
1111 | } | |
1112 | ||
1113 | static sector_t pscsi_get_blocks(struct se_device *dev) | |
1114 | { | |
0fd97ccf | 1115 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1116 | |
1117 | if (pdv->pdv_bd && pdv->pdv_bd->bd_part) | |
1118 | return pdv->pdv_bd->bd_part->nr_sects; | |
1119 | ||
1120 | dump_stack(); | |
1121 | return 0; | |
1122 | } | |
1123 | ||
5787cacd | 1124 | static void pscsi_req_done(struct request *req, int uptodate) |
c66ac9db | 1125 | { |
5787cacd CH |
1126 | struct se_cmd *cmd = req->end_io_data; |
1127 | struct pscsi_plugin_task *pt = cmd->priv; | |
1128 | ||
1129 | pt->pscsi_result = req->errors; | |
1130 | pt->pscsi_resid = req->resid_len; | |
1131 | ||
1132 | cmd->scsi_status = status_byte(pt->pscsi_result) << 1; | |
1133 | if (cmd->scsi_status) { | |
1134 | pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" | |
1135 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db NB |
1136 | pt->pscsi_result); |
1137 | } | |
1138 | ||
1139 | switch (host_byte(pt->pscsi_result)) { | |
1140 | case DID_OK: | |
5787cacd | 1141 | target_complete_cmd(cmd, cmd->scsi_status); |
c66ac9db NB |
1142 | break; |
1143 | default: | |
5787cacd CH |
1144 | pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" |
1145 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db | 1146 | pt->pscsi_result); |
5787cacd | 1147 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); |
c66ac9db NB |
1148 | break; |
1149 | } | |
c66ac9db | 1150 | |
c66ac9db | 1151 | __blk_put_request(req->q, req); |
5787cacd | 1152 | kfree(pt); |
c66ac9db NB |
1153 | } |
1154 | ||
1155 | static struct se_subsystem_api pscsi_template = { | |
1156 | .name = "pscsi", | |
1157 | .owner = THIS_MODULE, | |
1158 | .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, | |
c66ac9db NB |
1159 | .attach_hba = pscsi_attach_hba, |
1160 | .detach_hba = pscsi_detach_hba, | |
1161 | .pmode_enable_hba = pscsi_pmode_enable_hba, | |
0fd97ccf CH |
1162 | .alloc_device = pscsi_alloc_device, |
1163 | .configure_device = pscsi_configure_device, | |
c66ac9db NB |
1164 | .free_device = pscsi_free_device, |
1165 | .transport_complete = pscsi_transport_complete, | |
d6e0175c | 1166 | .parse_cdb = pscsi_parse_cdb, |
c66ac9db NB |
1167 | .set_configfs_dev_params = pscsi_set_configfs_dev_params, |
1168 | .show_configfs_dev_params = pscsi_show_configfs_dev_params, | |
c66ac9db NB |
1169 | .get_device_type = pscsi_get_device_type, |
1170 | .get_blocks = pscsi_get_blocks, | |
1171 | }; | |
1172 | ||
1173 | static int __init pscsi_module_init(void) | |
1174 | { | |
1175 | return transport_subsystem_register(&pscsi_template); | |
1176 | } | |
1177 | ||
63b91d5a | 1178 | static void __exit pscsi_module_exit(void) |
c66ac9db NB |
1179 | { |
1180 | transport_subsystem_release(&pscsi_template); | |
1181 | } | |
1182 | ||
1183 | MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); | |
1184 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
1185 | MODULE_LICENSE("GPL"); | |
1186 | ||
1187 | module_init(pscsi_module_init); | |
1188 | module_exit(pscsi_module_exit); |