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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_pscsi.c | |
3 | * | |
4 | * This file contains the generic target mode <-> Linux SCSI subsystem plugin. | |
5 | * | |
6 | * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
c66ac9db NB |
29 | #include <linux/string.h> |
30 | #include <linux/parser.h> | |
31 | #include <linux/timer.h> | |
32 | #include <linux/blkdev.h> | |
33 | #include <linux/blk_types.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/spinlock.h> | |
c66ac9db NB |
36 | #include <linux/genhd.h> |
37 | #include <linux/cdrom.h> | |
d6e0175c | 38 | #include <linux/ratelimit.h> |
827509e3 | 39 | #include <linux/module.h> |
d6e0175c CH |
40 | #include <asm/unaligned.h> |
41 | ||
c66ac9db NB |
42 | #include <scsi/scsi.h> |
43 | #include <scsi/scsi_device.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
45 | #include <scsi/scsi_host.h> | |
e66ecd50 | 46 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
47 | |
48 | #include <target/target_core_base.h> | |
c4795fb2 | 49 | #include <target/target_core_backend.h> |
c66ac9db | 50 | |
d6e0175c | 51 | #include "target_core_alua.h" |
c66ac9db NB |
52 | #include "target_core_pscsi.h" |
53 | ||
54 | #define ISPRINT(a) ((a >= ' ') && (a <= '~')) | |
55 | ||
0fd97ccf CH |
56 | static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev) |
57 | { | |
58 | return container_of(dev, struct pscsi_dev_virt, dev); | |
59 | } | |
60 | ||
c66ac9db NB |
61 | static struct se_subsystem_api pscsi_template; |
62 | ||
0c2ad7d1 | 63 | static int pscsi_execute_cmd(struct se_cmd *cmd); |
c66ac9db NB |
64 | static void pscsi_req_done(struct request *, int); |
65 | ||
c66ac9db NB |
66 | /* pscsi_attach_hba(): |
67 | * | |
68 | * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host. | |
69 | * from the passed SCSI Host ID. | |
70 | */ | |
71 | static int pscsi_attach_hba(struct se_hba *hba, u32 host_id) | |
72 | { | |
c66ac9db NB |
73 | struct pscsi_hba_virt *phv; |
74 | ||
75 | phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL); | |
6708bb27 AG |
76 | if (!phv) { |
77 | pr_err("Unable to allocate struct pscsi_hba_virt\n"); | |
e3d6f909 | 78 | return -ENOMEM; |
c66ac9db NB |
79 | } |
80 | phv->phv_host_id = host_id; | |
e6a8a41a | 81 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
c66ac9db | 82 | |
5951146d | 83 | hba->hba_ptr = phv; |
c66ac9db | 84 | |
6708bb27 | 85 | pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on" |
c66ac9db NB |
86 | " Generic Target Core Stack %s\n", hba->hba_id, |
87 | PSCSI_VERSION, TARGET_CORE_MOD_VERSION); | |
6708bb27 | 88 | pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n", |
e3d6f909 | 89 | hba->hba_id); |
c66ac9db NB |
90 | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static void pscsi_detach_hba(struct se_hba *hba) | |
95 | { | |
96 | struct pscsi_hba_virt *phv = hba->hba_ptr; | |
97 | struct Scsi_Host *scsi_host = phv->phv_lld_host; | |
98 | ||
99 | if (scsi_host) { | |
100 | scsi_host_put(scsi_host); | |
101 | ||
6708bb27 | 102 | pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from" |
c66ac9db NB |
103 | " Generic Target Core\n", hba->hba_id, |
104 | (scsi_host->hostt->name) ? (scsi_host->hostt->name) : | |
105 | "Unknown"); | |
106 | } else | |
6708bb27 | 107 | pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA" |
c66ac9db NB |
108 | " from Generic Target Core\n", hba->hba_id); |
109 | ||
110 | kfree(phv); | |
111 | hba->hba_ptr = NULL; | |
112 | } | |
113 | ||
114 | static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag) | |
115 | { | |
8359cf43 | 116 | struct pscsi_hba_virt *phv = hba->hba_ptr; |
c66ac9db | 117 | struct Scsi_Host *sh = phv->phv_lld_host; |
c66ac9db NB |
118 | /* |
119 | * Release the struct Scsi_Host | |
120 | */ | |
6708bb27 AG |
121 | if (!mode_flag) { |
122 | if (!sh) | |
c66ac9db NB |
123 | return 0; |
124 | ||
125 | phv->phv_lld_host = NULL; | |
e6a8a41a | 126 | phv->phv_mode = PHV_VIRTUAL_HOST_ID; |
c66ac9db | 127 | |
6708bb27 | 128 | pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough" |
c66ac9db NB |
129 | " %s\n", hba->hba_id, (sh->hostt->name) ? |
130 | (sh->hostt->name) : "Unknown"); | |
131 | ||
132 | scsi_host_put(sh); | |
133 | return 0; | |
134 | } | |
135 | /* | |
136 | * Otherwise, locate struct Scsi_Host from the original passed | |
137 | * pSCSI Host ID and enable for phba mode | |
138 | */ | |
e3d6f909 AG |
139 | sh = scsi_host_lookup(phv->phv_host_id); |
140 | if (IS_ERR(sh)) { | |
6708bb27 | 141 | pr_err("pSCSI: Unable to locate SCSI Host for" |
c66ac9db | 142 | " phv_host_id: %d\n", phv->phv_host_id); |
e3d6f909 | 143 | return PTR_ERR(sh); |
c66ac9db | 144 | } |
c66ac9db NB |
145 | |
146 | phv->phv_lld_host = sh; | |
147 | phv->phv_mode = PHV_LLD_SCSI_HOST_NO; | |
148 | ||
6708bb27 | 149 | pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n", |
c66ac9db NB |
150 | hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown"); |
151 | ||
152 | return 1; | |
153 | } | |
154 | ||
155 | static void pscsi_tape_read_blocksize(struct se_device *dev, | |
156 | struct scsi_device *sdev) | |
157 | { | |
158 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
159 | int ret; | |
160 | ||
161 | buf = kzalloc(12, GFP_KERNEL); | |
162 | if (!buf) | |
163 | return; | |
164 | ||
165 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
166 | cdb[0] = MODE_SENSE; | |
167 | cdb[4] = 0x0c; /* 12 bytes */ | |
168 | ||
169 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL, | |
170 | HZ, 1, NULL); | |
171 | if (ret) | |
172 | goto out_free; | |
173 | ||
174 | /* | |
175 | * If MODE_SENSE still returns zero, set the default value to 1024. | |
176 | */ | |
177 | sdev->sector_size = (buf[9] << 16) | (buf[10] << 8) | (buf[11]); | |
178 | if (!sdev->sector_size) | |
179 | sdev->sector_size = 1024; | |
180 | out_free: | |
181 | kfree(buf); | |
182 | } | |
183 | ||
184 | static void | |
185 | pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn) | |
186 | { | |
187 | unsigned char *buf; | |
188 | ||
189 | if (sdev->inquiry_len < INQUIRY_LEN) | |
190 | return; | |
191 | ||
192 | buf = sdev->inquiry; | |
193 | if (!buf) | |
194 | return; | |
195 | /* | |
196 | * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev() | |
197 | */ | |
198 | memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor)); | |
199 | memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model)); | |
200 | memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision)); | |
201 | } | |
202 | ||
203 | static int | |
204 | pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn) | |
205 | { | |
206 | unsigned char cdb[MAX_COMMAND_SIZE], *buf; | |
207 | int ret; | |
208 | ||
209 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
210 | if (!buf) | |
e3d6f909 | 211 | return -ENOMEM; |
c66ac9db NB |
212 | |
213 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
214 | cdb[0] = INQUIRY; | |
215 | cdb[1] = 0x01; /* Query VPD */ | |
216 | cdb[2] = 0x80; /* Unit Serial Number */ | |
217 | cdb[3] = (INQUIRY_VPD_SERIAL_LEN >> 8) & 0xff; | |
218 | cdb[4] = (INQUIRY_VPD_SERIAL_LEN & 0xff); | |
219 | ||
220 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
221 | INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL); | |
222 | if (ret) | |
223 | goto out_free; | |
224 | ||
225 | snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]); | |
226 | ||
0fd97ccf | 227 | wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL; |
c66ac9db NB |
228 | |
229 | kfree(buf); | |
230 | return 0; | |
231 | ||
232 | out_free: | |
233 | kfree(buf); | |
e3d6f909 | 234 | return -EPERM; |
c66ac9db NB |
235 | } |
236 | ||
237 | static void | |
238 | pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev, | |
239 | struct t10_wwn *wwn) | |
240 | { | |
241 | unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83; | |
242 | int ident_len, page_len, off = 4, ret; | |
243 | struct t10_vpd *vpd; | |
244 | ||
245 | buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL); | |
246 | if (!buf) | |
247 | return; | |
248 | ||
249 | memset(cdb, 0, MAX_COMMAND_SIZE); | |
250 | cdb[0] = INQUIRY; | |
251 | cdb[1] = 0x01; /* Query VPD */ | |
252 | cdb[2] = 0x83; /* Device Identifier */ | |
253 | cdb[3] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN >> 8) & 0xff; | |
254 | cdb[4] = (INQUIRY_VPD_DEVICE_IDENTIFIER_LEN & 0xff); | |
255 | ||
256 | ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, | |
257 | INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, | |
258 | NULL, HZ, 1, NULL); | |
259 | if (ret) | |
260 | goto out; | |
261 | ||
262 | page_len = (buf[2] << 8) | buf[3]; | |
263 | while (page_len > 0) { | |
264 | /* Grab a pointer to the Identification descriptor */ | |
265 | page_83 = &buf[off]; | |
266 | ident_len = page_83[3]; | |
267 | if (!ident_len) { | |
6708bb27 | 268 | pr_err("page_83[3]: identifier" |
c66ac9db NB |
269 | " length zero!\n"); |
270 | break; | |
271 | } | |
35d1efe8 | 272 | pr_debug("T10 VPD Identifier Length: %d\n", ident_len); |
c66ac9db NB |
273 | |
274 | vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL); | |
275 | if (!vpd) { | |
6708bb27 | 276 | pr_err("Unable to allocate memory for" |
c66ac9db NB |
277 | " struct t10_vpd\n"); |
278 | goto out; | |
279 | } | |
280 | INIT_LIST_HEAD(&vpd->vpd_list); | |
281 | ||
282 | transport_set_vpd_proto_id(vpd, page_83); | |
283 | transport_set_vpd_assoc(vpd, page_83); | |
284 | ||
285 | if (transport_set_vpd_ident_type(vpd, page_83) < 0) { | |
286 | off += (ident_len + 4); | |
287 | page_len -= (ident_len + 4); | |
288 | kfree(vpd); | |
289 | continue; | |
290 | } | |
291 | if (transport_set_vpd_ident(vpd, page_83) < 0) { | |
292 | off += (ident_len + 4); | |
293 | page_len -= (ident_len + 4); | |
294 | kfree(vpd); | |
295 | continue; | |
296 | } | |
297 | ||
298 | list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list); | |
299 | off += (ident_len + 4); | |
300 | page_len -= (ident_len + 4); | |
301 | } | |
302 | ||
303 | out: | |
304 | kfree(buf); | |
305 | } | |
306 | ||
0fd97ccf CH |
307 | static int pscsi_add_device_to_list(struct se_device *dev, |
308 | struct scsi_device *sd) | |
c66ac9db | 309 | { |
0fd97ccf CH |
310 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
311 | struct request_queue *q = sd->request_queue; | |
c66ac9db | 312 | |
0fd97ccf | 313 | pdv->pdv_sd = sd; |
c66ac9db NB |
314 | |
315 | if (!sd->queue_depth) { | |
316 | sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH; | |
317 | ||
6708bb27 | 318 | pr_err("Set broken SCSI Device %d:%d:%d" |
c66ac9db NB |
319 | " queue_depth to %d\n", sd->channel, sd->id, |
320 | sd->lun, sd->queue_depth); | |
321 | } | |
0fd97ccf CH |
322 | |
323 | dev->dev_attrib.hw_block_size = sd->sector_size; | |
324 | dev->dev_attrib.hw_max_sectors = | |
325 | min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q)); | |
326 | dev->dev_attrib.hw_queue_depth = sd->queue_depth; | |
327 | ||
c66ac9db NB |
328 | /* |
329 | * Setup our standard INQUIRY info into se_dev->t10_wwn | |
330 | */ | |
0fd97ccf | 331 | pscsi_set_inquiry_info(sd, &dev->t10_wwn); |
c66ac9db NB |
332 | |
333 | /* | |
334 | * Locate VPD WWN Information used for various purposes within | |
335 | * the Storage Engine. | |
336 | */ | |
0fd97ccf | 337 | if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) { |
c66ac9db NB |
338 | /* |
339 | * If VPD Unit Serial returned GOOD status, try | |
340 | * VPD Device Identification page (0x83). | |
341 | */ | |
0fd97ccf | 342 | pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn); |
c66ac9db NB |
343 | } |
344 | ||
345 | /* | |
346 | * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE. | |
347 | */ | |
348 | if (sd->type == TYPE_TAPE) | |
349 | pscsi_tape_read_blocksize(dev, sd); | |
0fd97ccf | 350 | return 0; |
c66ac9db NB |
351 | } |
352 | ||
0fd97ccf CH |
353 | static struct se_device *pscsi_alloc_device(struct se_hba *hba, |
354 | const char *name) | |
c66ac9db NB |
355 | { |
356 | struct pscsi_dev_virt *pdv; | |
357 | ||
358 | pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL); | |
6708bb27 AG |
359 | if (!pdv) { |
360 | pr_err("Unable to allocate memory for struct pscsi_dev_virt\n"); | |
c66ac9db NB |
361 | return NULL; |
362 | } | |
c66ac9db | 363 | |
6708bb27 | 364 | pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name); |
0fd97ccf | 365 | return &pdv->dev; |
c66ac9db NB |
366 | } |
367 | ||
368 | /* | |
369 | * Called with struct Scsi_Host->host_lock called. | |
370 | */ | |
0fd97ccf | 371 | static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd) |
5dd7ed2e | 372 | __releases(sh->host_lock) |
c66ac9db | 373 | { |
0fd97ccf CH |
374 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
375 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
376 | struct Scsi_Host *sh = sd->host; |
377 | struct block_device *bd; | |
0fd97ccf | 378 | int ret; |
c66ac9db NB |
379 | |
380 | if (scsi_device_get(sd)) { | |
6708bb27 | 381 | pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", |
c66ac9db NB |
382 | sh->host_no, sd->channel, sd->id, sd->lun); |
383 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf | 384 | return -EIO; |
c66ac9db NB |
385 | } |
386 | spin_unlock_irq(sh->host_lock); | |
387 | /* | |
388 | * Claim exclusive struct block_device access to struct scsi_device | |
389 | * for TYPE_DISK using supplied udev_path | |
390 | */ | |
0fd97ccf | 391 | bd = blkdev_get_by_path(dev->udev_path, |
c66ac9db | 392 | FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv); |
3ae279d2 | 393 | if (IS_ERR(bd)) { |
6708bb27 | 394 | pr_err("pSCSI: blkdev_get_by_path() failed\n"); |
c66ac9db | 395 | scsi_device_put(sd); |
0fd97ccf | 396 | return PTR_ERR(bd); |
c66ac9db NB |
397 | } |
398 | pdv->pdv_bd = bd; | |
399 | ||
0fd97ccf CH |
400 | ret = pscsi_add_device_to_list(dev, sd); |
401 | if (ret) { | |
c66ac9db NB |
402 | blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL); |
403 | scsi_device_put(sd); | |
0fd97ccf | 404 | return ret; |
c66ac9db | 405 | } |
0fd97ccf | 406 | |
6708bb27 | 407 | pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n", |
c66ac9db | 408 | phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun); |
0fd97ccf | 409 | return 0; |
c66ac9db NB |
410 | } |
411 | ||
412 | /* | |
413 | * Called with struct Scsi_Host->host_lock called. | |
414 | */ | |
0fd97ccf | 415 | static int pscsi_create_type_rom(struct se_device *dev, struct scsi_device *sd) |
5dd7ed2e | 416 | __releases(sh->host_lock) |
c66ac9db | 417 | { |
0fd97ccf | 418 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db | 419 | struct Scsi_Host *sh = sd->host; |
0fd97ccf | 420 | int ret; |
c66ac9db NB |
421 | |
422 | if (scsi_device_get(sd)) { | |
6708bb27 | 423 | pr_err("scsi_device_get() failed for %d:%d:%d:%d\n", |
c66ac9db NB |
424 | sh->host_no, sd->channel, sd->id, sd->lun); |
425 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf | 426 | return -EIO; |
c66ac9db NB |
427 | } |
428 | spin_unlock_irq(sh->host_lock); | |
429 | ||
0fd97ccf CH |
430 | ret = pscsi_add_device_to_list(dev, sd); |
431 | if (ret) { | |
c66ac9db | 432 | scsi_device_put(sd); |
0fd97ccf | 433 | return ret; |
c66ac9db | 434 | } |
6708bb27 | 435 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", |
c66ac9db NB |
436 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
437 | sd->channel, sd->id, sd->lun); | |
438 | ||
0fd97ccf | 439 | return 0; |
c66ac9db NB |
440 | } |
441 | ||
442 | /* | |
0fd97ccf | 443 | * Called with struct Scsi_Host->host_lock called. |
c66ac9db | 444 | */ |
0fd97ccf CH |
445 | static int pscsi_create_type_other(struct se_device *dev, |
446 | struct scsi_device *sd) | |
5dd7ed2e | 447 | __releases(sh->host_lock) |
c66ac9db | 448 | { |
0fd97ccf | 449 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db | 450 | struct Scsi_Host *sh = sd->host; |
0fd97ccf | 451 | int ret; |
c66ac9db NB |
452 | |
453 | spin_unlock_irq(sh->host_lock); | |
0fd97ccf CH |
454 | ret = pscsi_add_device_to_list(dev, sd); |
455 | if (ret) | |
456 | return ret; | |
c66ac9db | 457 | |
6708bb27 | 458 | pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n", |
c66ac9db NB |
459 | phv->phv_host_id, scsi_device_type(sd->type), sh->host_no, |
460 | sd->channel, sd->id, sd->lun); | |
0fd97ccf | 461 | return 0; |
c66ac9db NB |
462 | } |
463 | ||
ecf0dd66 | 464 | static int pscsi_configure_device(struct se_device *dev) |
c66ac9db | 465 | { |
0fd97ccf CH |
466 | struct se_hba *hba = dev->se_hba; |
467 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db | 468 | struct scsi_device *sd; |
0fd97ccf | 469 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
c66ac9db NB |
470 | struct Scsi_Host *sh = phv->phv_lld_host; |
471 | int legacy_mode_enable = 0; | |
0fd97ccf | 472 | int ret; |
c66ac9db | 473 | |
0fd97ccf CH |
474 | if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) || |
475 | !(pdv->pdv_flags & PDF_HAS_TARGET_ID) || | |
476 | !(pdv->pdv_flags & PDF_HAS_LUN_ID)) { | |
477 | pr_err("Missing scsi_channel_id=, scsi_target_id= and" | |
478 | " scsi_lun_id= parameters\n"); | |
479 | return -EINVAL; | |
c66ac9db | 480 | } |
0fd97ccf | 481 | |
c66ac9db NB |
482 | /* |
483 | * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the | |
484 | * struct Scsi_Host we will need to bring the TCM/pSCSI object online | |
485 | */ | |
6708bb27 | 486 | if (!sh) { |
c66ac9db | 487 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { |
6708bb27 | 488 | pr_err("pSCSI: Unable to locate struct" |
c66ac9db | 489 | " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n"); |
0fd97ccf | 490 | return -ENODEV; |
c66ac9db NB |
491 | } |
492 | /* | |
e6a8a41a | 493 | * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device |
c66ac9db NB |
494 | * reference, we enforce that udev_path has been set |
495 | */ | |
0fd97ccf | 496 | if (!(dev->dev_flags & DF_USING_UDEV_PATH)) { |
6708bb27 | 497 | pr_err("pSCSI: udev_path attribute has not" |
c66ac9db | 498 | " been set before ENABLE=1\n"); |
0fd97ccf | 499 | return -EINVAL; |
c66ac9db NB |
500 | } |
501 | /* | |
e6a8a41a | 502 | * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID, |
c66ac9db NB |
503 | * use the original TCM hba ID to reference Linux/SCSI Host No |
504 | * and enable for PHV_LLD_SCSI_HOST_NO mode. | |
505 | */ | |
506 | if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) { | |
0fd97ccf | 507 | if (hba->dev_count) { |
6708bb27 | 508 | pr_err("pSCSI: Unable to set hba_mode" |
c66ac9db | 509 | " with active devices\n"); |
0fd97ccf | 510 | return -EEXIST; |
c66ac9db | 511 | } |
c66ac9db NB |
512 | |
513 | if (pscsi_pmode_enable_hba(hba, 1) != 1) | |
0fd97ccf | 514 | return -ENODEV; |
c66ac9db NB |
515 | |
516 | legacy_mode_enable = 1; | |
517 | hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; | |
518 | sh = phv->phv_lld_host; | |
519 | } else { | |
e3d6f909 AG |
520 | sh = scsi_host_lookup(pdv->pdv_host_id); |
521 | if (IS_ERR(sh)) { | |
6708bb27 | 522 | pr_err("pSCSI: Unable to locate" |
c66ac9db | 523 | " pdv_host_id: %d\n", pdv->pdv_host_id); |
0fd97ccf | 524 | return PTR_ERR(sh); |
c66ac9db NB |
525 | } |
526 | } | |
527 | } else { | |
e6a8a41a SH |
528 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) { |
529 | pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while" | |
c66ac9db | 530 | " struct Scsi_Host exists\n"); |
0fd97ccf | 531 | return -EEXIST; |
c66ac9db NB |
532 | } |
533 | } | |
534 | ||
535 | spin_lock_irq(sh->host_lock); | |
536 | list_for_each_entry(sd, &sh->__devices, siblings) { | |
537 | if ((pdv->pdv_channel_id != sd->channel) || | |
538 | (pdv->pdv_target_id != sd->id) || | |
539 | (pdv->pdv_lun_id != sd->lun)) | |
540 | continue; | |
541 | /* | |
542 | * Functions will release the held struct scsi_host->host_lock | |
543 | * before calling calling pscsi_add_device_to_list() to register | |
544 | * struct scsi_device with target_core_mod. | |
545 | */ | |
546 | switch (sd->type) { | |
547 | case TYPE_DISK: | |
0fd97ccf | 548 | ret = pscsi_create_type_disk(dev, sd); |
c66ac9db NB |
549 | break; |
550 | case TYPE_ROM: | |
0fd97ccf | 551 | ret = pscsi_create_type_rom(dev, sd); |
c66ac9db NB |
552 | break; |
553 | default: | |
0fd97ccf | 554 | ret = pscsi_create_type_other(dev, sd); |
c66ac9db NB |
555 | break; |
556 | } | |
557 | ||
0fd97ccf | 558 | if (ret) { |
e6a8a41a | 559 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
560 | scsi_host_put(sh); |
561 | else if (legacy_mode_enable) { | |
562 | pscsi_pmode_enable_hba(hba, 0); | |
563 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
564 | } | |
565 | pdv->pdv_sd = NULL; | |
0fd97ccf | 566 | return ret; |
c66ac9db | 567 | } |
0fd97ccf | 568 | return 0; |
c66ac9db NB |
569 | } |
570 | spin_unlock_irq(sh->host_lock); | |
571 | ||
6708bb27 | 572 | pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no, |
c66ac9db NB |
573 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id); |
574 | ||
e6a8a41a | 575 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
576 | scsi_host_put(sh); |
577 | else if (legacy_mode_enable) { | |
578 | pscsi_pmode_enable_hba(hba, 0); | |
579 | hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; | |
580 | } | |
581 | ||
0fd97ccf | 582 | return -ENODEV; |
c66ac9db NB |
583 | } |
584 | ||
0fd97ccf | 585 | static void pscsi_free_device(struct se_device *dev) |
c66ac9db | 586 | { |
0fd97ccf CH |
587 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
588 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
589 | struct scsi_device *sd = pdv->pdv_sd; |
590 | ||
591 | if (sd) { | |
592 | /* | |
593 | * Release exclusive pSCSI internal struct block_device claim for | |
594 | * struct scsi_device with TYPE_DISK from pscsi_create_type_disk() | |
595 | */ | |
596 | if ((sd->type == TYPE_DISK) && pdv->pdv_bd) { | |
597 | blkdev_put(pdv->pdv_bd, | |
598 | FMODE_WRITE|FMODE_READ|FMODE_EXCL); | |
599 | pdv->pdv_bd = NULL; | |
600 | } | |
601 | /* | |
602 | * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference | |
603 | * to struct Scsi_Host now. | |
604 | */ | |
605 | if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) && | |
606 | (phv->phv_lld_host != NULL)) | |
607 | scsi_host_put(phv->phv_lld_host); | |
608 | ||
609 | if ((sd->type == TYPE_DISK) || (sd->type == TYPE_ROM)) | |
610 | scsi_device_put(sd); | |
611 | ||
612 | pdv->pdv_sd = NULL; | |
613 | } | |
614 | ||
615 | kfree(pdv); | |
616 | } | |
617 | ||
d5829eac PB |
618 | static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg, |
619 | unsigned char *sense_buffer) | |
c66ac9db | 620 | { |
0fd97ccf | 621 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
c66ac9db NB |
622 | struct scsi_device *sd = pdv->pdv_sd; |
623 | int result; | |
5787cacd | 624 | struct pscsi_plugin_task *pt = cmd->priv; |
1d2a2cd9 NB |
625 | unsigned char *cdb; |
626 | /* | |
627 | * Special case for REPORT_LUNs handling where pscsi_plugin_task has | |
628 | * not been allocated because TCM is handling the emulation directly. | |
629 | */ | |
630 | if (!pt) | |
d5829eac | 631 | return; |
c66ac9db | 632 | |
1d2a2cd9 | 633 | cdb = &pt->pscsi_cdb[0]; |
c66ac9db NB |
634 | result = pt->pscsi_result; |
635 | /* | |
636 | * Hack to make sure that Write-Protect modepage is set if R/O mode is | |
637 | * forced. | |
638 | */ | |
306c11b2 PB |
639 | if (!cmd->se_deve || !cmd->data_length) |
640 | goto after_mode_sense; | |
641 | ||
c66ac9db NB |
642 | if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) && |
643 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
5787cacd CH |
644 | if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) { |
645 | unsigned char *buf = transport_kmap_data_sg(cmd); | |
c66ac9db NB |
646 | |
647 | if (cdb[0] == MODE_SENSE_10) { | |
648 | if (!(buf[3] & 0x80)) | |
649 | buf[3] |= 0x80; | |
650 | } else { | |
651 | if (!(buf[2] & 0x80)) | |
652 | buf[2] |= 0x80; | |
653 | } | |
05d1c7c0 | 654 | |
5787cacd | 655 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
656 | } |
657 | } | |
658 | after_mode_sense: | |
659 | ||
306c11b2 | 660 | if (sd->type != TYPE_TAPE || !cmd->data_length) |
c66ac9db NB |
661 | goto after_mode_select; |
662 | ||
663 | /* | |
664 | * Hack to correctly obtain the initiator requested blocksize for | |
665 | * TYPE_TAPE. Since this value is dependent upon each tape media, | |
666 | * struct scsi_device->sector_size will not contain the correct value | |
667 | * by default, so we go ahead and set it so | |
668 | * TRANSPORT(dev)->get_blockdev() returns the correct value to the | |
669 | * storage engine. | |
670 | */ | |
671 | if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) && | |
672 | (status_byte(result) << 1) == SAM_STAT_GOOD) { | |
673 | unsigned char *buf; | |
c66ac9db NB |
674 | u16 bdl; |
675 | u32 blocksize; | |
676 | ||
677 | buf = sg_virt(&sg[0]); | |
6708bb27 AG |
678 | if (!buf) { |
679 | pr_err("Unable to get buf for scatterlist\n"); | |
c66ac9db NB |
680 | goto after_mode_select; |
681 | } | |
682 | ||
683 | if (cdb[0] == MODE_SELECT) | |
684 | bdl = (buf[3]); | |
685 | else | |
686 | bdl = (buf[6] << 8) | (buf[7]); | |
687 | ||
688 | if (!bdl) | |
689 | goto after_mode_select; | |
690 | ||
691 | if (cdb[0] == MODE_SELECT) | |
692 | blocksize = (buf[9] << 16) | (buf[10] << 8) | | |
693 | (buf[11]); | |
694 | else | |
695 | blocksize = (buf[13] << 16) | (buf[14] << 8) | | |
696 | (buf[15]); | |
697 | ||
698 | sd->sector_size = blocksize; | |
699 | } | |
700 | after_mode_select: | |
701 | ||
d5829eac PB |
702 | if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) { |
703 | memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER); | |
704 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
705 | } | |
c66ac9db NB |
706 | } |
707 | ||
c66ac9db NB |
708 | enum { |
709 | Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id, | |
710 | Opt_scsi_lun_id, Opt_err | |
711 | }; | |
712 | ||
713 | static match_table_t tokens = { | |
714 | {Opt_scsi_host_id, "scsi_host_id=%d"}, | |
715 | {Opt_scsi_channel_id, "scsi_channel_id=%d"}, | |
716 | {Opt_scsi_target_id, "scsi_target_id=%d"}, | |
717 | {Opt_scsi_lun_id, "scsi_lun_id=%d"}, | |
718 | {Opt_err, NULL} | |
719 | }; | |
720 | ||
0fd97ccf CH |
721 | static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev, |
722 | const char *page, ssize_t count) | |
c66ac9db | 723 | { |
0fd97ccf CH |
724 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
725 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; | |
c66ac9db NB |
726 | char *orig, *ptr, *opts; |
727 | substring_t args[MAX_OPT_ARGS]; | |
728 | int ret = 0, arg, token; | |
729 | ||
730 | opts = kstrdup(page, GFP_KERNEL); | |
731 | if (!opts) | |
732 | return -ENOMEM; | |
733 | ||
734 | orig = opts; | |
735 | ||
90c161b6 | 736 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
c66ac9db NB |
737 | if (!*ptr) |
738 | continue; | |
739 | ||
740 | token = match_token(ptr, tokens, args); | |
741 | switch (token) { | |
742 | case Opt_scsi_host_id: | |
743 | if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) { | |
6708bb27 | 744 | pr_err("PSCSI[%d]: Unable to accept" |
c66ac9db NB |
745 | " scsi_host_id while phv_mode ==" |
746 | " PHV_LLD_SCSI_HOST_NO\n", | |
747 | phv->phv_host_id); | |
748 | ret = -EINVAL; | |
749 | goto out; | |
750 | } | |
751 | match_int(args, &arg); | |
752 | pdv->pdv_host_id = arg; | |
6708bb27 | 753 | pr_debug("PSCSI[%d]: Referencing SCSI Host ID:" |
c66ac9db NB |
754 | " %d\n", phv->phv_host_id, pdv->pdv_host_id); |
755 | pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID; | |
756 | break; | |
757 | case Opt_scsi_channel_id: | |
758 | match_int(args, &arg); | |
759 | pdv->pdv_channel_id = arg; | |
6708bb27 | 760 | pr_debug("PSCSI[%d]: Referencing SCSI Channel" |
c66ac9db NB |
761 | " ID: %d\n", phv->phv_host_id, |
762 | pdv->pdv_channel_id); | |
763 | pdv->pdv_flags |= PDF_HAS_CHANNEL_ID; | |
764 | break; | |
765 | case Opt_scsi_target_id: | |
766 | match_int(args, &arg); | |
767 | pdv->pdv_target_id = arg; | |
6708bb27 | 768 | pr_debug("PSCSI[%d]: Referencing SCSI Target" |
c66ac9db NB |
769 | " ID: %d\n", phv->phv_host_id, |
770 | pdv->pdv_target_id); | |
771 | pdv->pdv_flags |= PDF_HAS_TARGET_ID; | |
772 | break; | |
773 | case Opt_scsi_lun_id: | |
774 | match_int(args, &arg); | |
775 | pdv->pdv_lun_id = arg; | |
6708bb27 | 776 | pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:" |
c66ac9db NB |
777 | " %d\n", phv->phv_host_id, pdv->pdv_lun_id); |
778 | pdv->pdv_flags |= PDF_HAS_LUN_ID; | |
779 | break; | |
780 | default: | |
781 | break; | |
782 | } | |
783 | } | |
784 | ||
785 | out: | |
786 | kfree(orig); | |
787 | return (!ret) ? count : ret; | |
788 | } | |
789 | ||
0fd97ccf | 790 | static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b) |
c66ac9db | 791 | { |
0fd97ccf CH |
792 | struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr; |
793 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); | |
c66ac9db NB |
794 | struct scsi_device *sd = pdv->pdv_sd; |
795 | unsigned char host_id[16]; | |
796 | ssize_t bl; | |
797 | int i; | |
798 | ||
e6a8a41a | 799 | if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) |
c66ac9db NB |
800 | snprintf(host_id, 16, "%d", pdv->pdv_host_id); |
801 | else | |
802 | snprintf(host_id, 16, "PHBA Mode"); | |
803 | ||
804 | bl = sprintf(b, "SCSI Device Bus Location:" | |
805 | " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n", | |
806 | pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id, | |
807 | host_id); | |
808 | ||
809 | if (sd) { | |
810 | bl += sprintf(b + bl, " "); | |
811 | bl += sprintf(b + bl, "Vendor: "); | |
812 | for (i = 0; i < 8; i++) { | |
813 | if (ISPRINT(sd->vendor[i])) /* printable character? */ | |
814 | bl += sprintf(b + bl, "%c", sd->vendor[i]); | |
815 | else | |
816 | bl += sprintf(b + bl, " "); | |
817 | } | |
818 | bl += sprintf(b + bl, " Model: "); | |
819 | for (i = 0; i < 16; i++) { | |
820 | if (ISPRINT(sd->model[i])) /* printable character ? */ | |
821 | bl += sprintf(b + bl, "%c", sd->model[i]); | |
822 | else | |
823 | bl += sprintf(b + bl, " "); | |
824 | } | |
825 | bl += sprintf(b + bl, " Rev: "); | |
826 | for (i = 0; i < 4; i++) { | |
827 | if (ISPRINT(sd->rev[i])) /* printable character ? */ | |
828 | bl += sprintf(b + bl, "%c", sd->rev[i]); | |
829 | else | |
830 | bl += sprintf(b + bl, " "); | |
831 | } | |
832 | bl += sprintf(b + bl, "\n"); | |
833 | } | |
834 | return bl; | |
835 | } | |
836 | ||
837 | static void pscsi_bi_endio(struct bio *bio, int error) | |
838 | { | |
839 | bio_put(bio); | |
840 | } | |
841 | ||
a1d8b49a | 842 | static inline struct bio *pscsi_get_bio(int sg_num) |
c66ac9db NB |
843 | { |
844 | struct bio *bio; | |
845 | /* | |
846 | * Use bio_malloc() following the comment in for bio -> struct request | |
847 | * in block/blk-core.c:blk_make_request() | |
848 | */ | |
849 | bio = bio_kmalloc(GFP_KERNEL, sg_num); | |
6708bb27 AG |
850 | if (!bio) { |
851 | pr_err("PSCSI: bio_kmalloc() failed\n"); | |
c66ac9db NB |
852 | return NULL; |
853 | } | |
854 | bio->bi_end_io = pscsi_bi_endio; | |
855 | ||
856 | return bio; | |
857 | } | |
858 | ||
5787cacd CH |
859 | static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, |
860 | u32 sgl_nents, enum dma_data_direction data_direction, | |
02b1a746 | 861 | struct bio **hbio) |
c66ac9db | 862 | { |
0fd97ccf | 863 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
02b1a746 | 864 | struct bio *bio = NULL, *tbio = NULL; |
c66ac9db NB |
865 | struct page *page; |
866 | struct scatterlist *sg; | |
7a83aa4e | 867 | u32 data_len = cmd->data_length, i, len, bytes, off; |
5787cacd | 868 | int nr_pages = (cmd->data_length + sgl[0].offset + |
c66ac9db | 869 | PAGE_SIZE - 1) >> PAGE_SHIFT; |
03e98c9e | 870 | int nr_vecs = 0, rc; |
5787cacd | 871 | int rw = (data_direction == DMA_TO_DEVICE); |
c66ac9db | 872 | |
02b1a746 CH |
873 | *hbio = NULL; |
874 | ||
6708bb27 | 875 | pr_debug("PSCSI: nr_pages: %d\n", nr_pages); |
c66ac9db | 876 | |
5787cacd | 877 | for_each_sg(sgl, sg, sgl_nents, i) { |
c66ac9db NB |
878 | page = sg_page(sg); |
879 | off = sg->offset; | |
880 | len = sg->length; | |
881 | ||
6708bb27 | 882 | pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i, |
c66ac9db NB |
883 | page, len, off); |
884 | ||
885 | while (len > 0 && data_len > 0) { | |
886 | bytes = min_t(unsigned int, len, PAGE_SIZE - off); | |
887 | bytes = min(bytes, data_len); | |
888 | ||
6708bb27 | 889 | if (!bio) { |
c66ac9db NB |
890 | nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); |
891 | nr_pages -= nr_vecs; | |
892 | /* | |
893 | * Calls bio_kmalloc() and sets bio->bi_end_io() | |
894 | */ | |
a1d8b49a | 895 | bio = pscsi_get_bio(nr_vecs); |
6708bb27 | 896 | if (!bio) |
c66ac9db NB |
897 | goto fail; |
898 | ||
899 | if (rw) | |
900 | bio->bi_rw |= REQ_WRITE; | |
901 | ||
6708bb27 | 902 | pr_debug("PSCSI: Allocated bio: %p," |
c66ac9db NB |
903 | " dir: %s nr_vecs: %d\n", bio, |
904 | (rw) ? "rw" : "r", nr_vecs); | |
905 | /* | |
906 | * Set *hbio pointer to handle the case: | |
907 | * nr_pages > BIO_MAX_PAGES, where additional | |
908 | * bios need to be added to complete a given | |
5787cacd | 909 | * command. |
c66ac9db | 910 | */ |
02b1a746 CH |
911 | if (!*hbio) |
912 | *hbio = tbio = bio; | |
c66ac9db NB |
913 | else |
914 | tbio = tbio->bi_next = bio; | |
915 | } | |
916 | ||
6708bb27 | 917 | pr_debug("PSCSI: Calling bio_add_pc_page() i: %d" |
c66ac9db NB |
918 | " bio: %p page: %p len: %d off: %d\n", i, bio, |
919 | page, len, off); | |
920 | ||
921 | rc = bio_add_pc_page(pdv->pdv_sd->request_queue, | |
922 | bio, page, bytes, off); | |
923 | if (rc != bytes) | |
924 | goto fail; | |
925 | ||
6708bb27 | 926 | pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n", |
c66ac9db NB |
927 | bio->bi_vcnt, nr_vecs); |
928 | ||
929 | if (bio->bi_vcnt > nr_vecs) { | |
6708bb27 | 930 | pr_debug("PSCSI: Reached bio->bi_vcnt max:" |
c66ac9db NB |
931 | " %d i: %d bio: %p, allocating another" |
932 | " bio\n", bio->bi_vcnt, i, bio); | |
933 | /* | |
934 | * Clear the pointer so that another bio will | |
935 | * be allocated with pscsi_get_bio() above, the | |
936 | * current bio has already been set *tbio and | |
937 | * bio->bi_next. | |
938 | */ | |
939 | bio = NULL; | |
940 | } | |
941 | ||
942 | page++; | |
943 | len -= bytes; | |
944 | data_len -= bytes; | |
945 | off = 0; | |
946 | } | |
947 | } | |
c66ac9db | 948 | |
5787cacd | 949 | return sgl_nents; |
c66ac9db | 950 | fail: |
02b1a746 CH |
951 | while (*hbio) { |
952 | bio = *hbio; | |
953 | *hbio = (*hbio)->bi_next; | |
c66ac9db | 954 | bio->bi_next = NULL; |
02b1a746 | 955 | bio_endio(bio, 0); /* XXX: should be error */ |
c66ac9db | 956 | } |
03e98c9e NB |
957 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
958 | return -ENOMEM; | |
c66ac9db NB |
959 | } |
960 | ||
3d6d7201 CH |
961 | /* |
962 | * Clear a lun set in the cdb if the initiator talking to use spoke | |
963 | * and old standards version, as we can't assume the underlying device | |
964 | * won't choke up on it. | |
965 | */ | |
966 | static inline void pscsi_clear_cdb_lun(unsigned char *cdb) | |
967 | { | |
968 | switch (cdb[0]) { | |
969 | case READ_10: /* SBC - RDProtect */ | |
970 | case READ_12: /* SBC - RDProtect */ | |
971 | case READ_16: /* SBC - RDProtect */ | |
972 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
973 | case VERIFY: /* SBC - VRProtect */ | |
974 | case VERIFY_16: /* SBC - VRProtect */ | |
975 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
976 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
977 | case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ | |
978 | break; | |
979 | default: | |
980 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
981 | break; | |
982 | } | |
983 | } | |
984 | ||
1fd032ee | 985 | static int pscsi_parse_cdb(struct se_cmd *cmd) |
d6e0175c | 986 | { |
1fd032ee | 987 | unsigned char *cdb = cmd->t_task_cdb; |
d6e0175c | 988 | |
1fd032ee CH |
989 | if (cmd->se_cmd_flags & SCF_BIDI) { |
990 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
991 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
992 | return -EINVAL; | |
d6e0175c CH |
993 | } |
994 | ||
3d6d7201 CH |
995 | pscsi_clear_cdb_lun(cdb); |
996 | ||
d6e0175c | 997 | /* |
a3785c87 NB |
998 | * For REPORT LUNS we always need to emulate the response, for everything |
999 | * else the default for pSCSI is to pass the command to the underlying | |
1000 | * LLD / physical hardware. | |
d6e0175c | 1001 | */ |
d6e0175c | 1002 | switch (cdb[0]) { |
1fd032ee | 1003 | case REPORT_LUNS: |
8de530a5 | 1004 | return spc_emulate_report_luns(cmd); |
1fd032ee | 1005 | case READ_6: |
d6e0175c | 1006 | case READ_10: |
d6e0175c | 1007 | case READ_12: |
d6e0175c | 1008 | case READ_16: |
d6e0175c | 1009 | case WRITE_6: |
d6e0175c | 1010 | case WRITE_10: |
d6e0175c | 1011 | case WRITE_12: |
d6e0175c | 1012 | case WRITE_16: |
1fd032ee | 1013 | case WRITE_VERIFY: |
d6e0175c | 1014 | cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; |
0c2ad7d1 | 1015 | /* FALLTHROUGH*/ |
d6e0175c | 1016 | default: |
0c2ad7d1 | 1017 | cmd->execute_cmd = pscsi_execute_cmd; |
8de530a5 | 1018 | return 0; |
d6e0175c | 1019 | } |
d6e0175c CH |
1020 | } |
1021 | ||
0c2ad7d1 | 1022 | static int pscsi_execute_cmd(struct se_cmd *cmd) |
c66ac9db | 1023 | { |
0c2ad7d1 CH |
1024 | struct scatterlist *sgl = cmd->t_data_sg; |
1025 | u32 sgl_nents = cmd->t_data_nents; | |
1026 | enum dma_data_direction data_direction = cmd->data_direction; | |
0fd97ccf | 1027 | struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev); |
5787cacd | 1028 | struct pscsi_plugin_task *pt; |
02b1a746 CH |
1029 | struct request *req; |
1030 | struct bio *hbio; | |
c66ac9db NB |
1031 | int ret; |
1032 | ||
5787cacd CH |
1033 | /* |
1034 | * Dynamically alloc cdb space, since it may be larger than | |
1035 | * TCM_MAX_COMMAND_SIZE | |
1036 | */ | |
1037 | pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL); | |
1038 | if (!pt) { | |
1039 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1040 | return -ENOMEM; | |
1041 | } | |
1042 | cmd->priv = pt; | |
1043 | ||
ed3102c6 CH |
1044 | memcpy(pt->pscsi_cdb, cmd->t_task_cdb, |
1045 | scsi_command_size(cmd->t_task_cdb)); | |
485fd0d1 | 1046 | |
64f1db38 | 1047 | if (!sgl) { |
02b1a746 | 1048 | req = blk_get_request(pdv->pdv_sd->request_queue, |
5787cacd | 1049 | (data_direction == DMA_TO_DEVICE), |
02b1a746 CH |
1050 | GFP_KERNEL); |
1051 | if (!req || IS_ERR(req)) { | |
1052 | pr_err("PSCSI: blk_get_request() failed: %ld\n", | |
1053 | req ? IS_ERR(req) : -ENOMEM); | |
03e98c9e NB |
1054 | cmd->scsi_sense_reason = |
1055 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
5787cacd | 1056 | goto fail; |
02b1a746 CH |
1057 | } |
1058 | } else { | |
7a83aa4e | 1059 | BUG_ON(!cmd->data_length); |
c66ac9db | 1060 | |
5787cacd | 1061 | ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio); |
03e98c9e NB |
1062 | if (ret < 0) { |
1063 | cmd->scsi_sense_reason = | |
1064 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
5787cacd | 1065 | goto fail; |
03e98c9e | 1066 | } |
02b1a746 CH |
1067 | |
1068 | req = blk_make_request(pdv->pdv_sd->request_queue, hbio, | |
1069 | GFP_KERNEL); | |
ed327ed3 | 1070 | if (IS_ERR(req)) { |
02b1a746 | 1071 | pr_err("pSCSI: blk_make_request() failed\n"); |
5787cacd | 1072 | goto fail_free_bio; |
02b1a746 | 1073 | } |
c66ac9db NB |
1074 | } |
1075 | ||
02b1a746 CH |
1076 | req->cmd_type = REQ_TYPE_BLOCK_PC; |
1077 | req->end_io = pscsi_req_done; | |
5787cacd | 1078 | req->end_io_data = cmd; |
02b1a746 CH |
1079 | req->cmd_len = scsi_command_size(pt->pscsi_cdb); |
1080 | req->cmd = &pt->pscsi_cdb[0]; | |
1081 | req->sense = &pt->pscsi_sense[0]; | |
1082 | req->sense_len = 0; | |
1083 | if (pdv->pdv_sd->type == TYPE_DISK) | |
1084 | req->timeout = PS_TIMEOUT_DISK; | |
1085 | else | |
1086 | req->timeout = PS_TIMEOUT_OTHER; | |
1087 | req->retries = PS_RETRY; | |
c66ac9db | 1088 | |
02b1a746 | 1089 | blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req, |
5787cacd | 1090 | (cmd->sam_task_attr == MSG_HEAD_TAG), |
02b1a746 CH |
1091 | pscsi_req_done); |
1092 | ||
03e98c9e | 1093 | return 0; |
02b1a746 | 1094 | |
5787cacd | 1095 | fail_free_bio: |
02b1a746 CH |
1096 | while (hbio) { |
1097 | struct bio *bio = hbio; | |
1098 | hbio = hbio->bi_next; | |
1099 | bio->bi_next = NULL; | |
1100 | bio_endio(bio, 0); /* XXX: should be error */ | |
1101 | } | |
03e98c9e | 1102 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
5787cacd CH |
1103 | fail: |
1104 | kfree(pt); | |
03e98c9e | 1105 | return -ENOMEM; |
c66ac9db NB |
1106 | } |
1107 | ||
c66ac9db NB |
1108 | /* pscsi_get_device_rev(): |
1109 | * | |
1110 | * | |
1111 | */ | |
1112 | static u32 pscsi_get_device_rev(struct se_device *dev) | |
1113 | { | |
0fd97ccf | 1114 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1115 | struct scsi_device *sd = pdv->pdv_sd; |
1116 | ||
1117 | return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1; | |
1118 | } | |
1119 | ||
1120 | /* pscsi_get_device_type(): | |
1121 | * | |
1122 | * | |
1123 | */ | |
1124 | static u32 pscsi_get_device_type(struct se_device *dev) | |
1125 | { | |
0fd97ccf | 1126 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1127 | struct scsi_device *sd = pdv->pdv_sd; |
1128 | ||
1129 | return sd->type; | |
1130 | } | |
1131 | ||
1132 | static sector_t pscsi_get_blocks(struct se_device *dev) | |
1133 | { | |
0fd97ccf | 1134 | struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); |
c66ac9db NB |
1135 | |
1136 | if (pdv->pdv_bd && pdv->pdv_bd->bd_part) | |
1137 | return pdv->pdv_bd->bd_part->nr_sects; | |
1138 | ||
1139 | dump_stack(); | |
1140 | return 0; | |
1141 | } | |
1142 | ||
5787cacd | 1143 | static void pscsi_req_done(struct request *req, int uptodate) |
c66ac9db | 1144 | { |
5787cacd CH |
1145 | struct se_cmd *cmd = req->end_io_data; |
1146 | struct pscsi_plugin_task *pt = cmd->priv; | |
1147 | ||
1148 | pt->pscsi_result = req->errors; | |
1149 | pt->pscsi_resid = req->resid_len; | |
1150 | ||
1151 | cmd->scsi_status = status_byte(pt->pscsi_result) << 1; | |
1152 | if (cmd->scsi_status) { | |
1153 | pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" | |
1154 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db NB |
1155 | pt->pscsi_result); |
1156 | } | |
1157 | ||
1158 | switch (host_byte(pt->pscsi_result)) { | |
1159 | case DID_OK: | |
5787cacd | 1160 | target_complete_cmd(cmd, cmd->scsi_status); |
c66ac9db NB |
1161 | break; |
1162 | default: | |
5787cacd CH |
1163 | pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" |
1164 | " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0], | |
c66ac9db | 1165 | pt->pscsi_result); |
5787cacd CH |
1166 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1167 | target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); | |
c66ac9db NB |
1168 | break; |
1169 | } | |
c66ac9db | 1170 | |
c66ac9db | 1171 | __blk_put_request(req->q, req); |
5787cacd | 1172 | kfree(pt); |
c66ac9db NB |
1173 | } |
1174 | ||
1175 | static struct se_subsystem_api pscsi_template = { | |
1176 | .name = "pscsi", | |
1177 | .owner = THIS_MODULE, | |
1178 | .transport_type = TRANSPORT_PLUGIN_PHBA_PDEV, | |
c66ac9db NB |
1179 | .attach_hba = pscsi_attach_hba, |
1180 | .detach_hba = pscsi_detach_hba, | |
1181 | .pmode_enable_hba = pscsi_pmode_enable_hba, | |
0fd97ccf CH |
1182 | .alloc_device = pscsi_alloc_device, |
1183 | .configure_device = pscsi_configure_device, | |
c66ac9db NB |
1184 | .free_device = pscsi_free_device, |
1185 | .transport_complete = pscsi_transport_complete, | |
d6e0175c | 1186 | .parse_cdb = pscsi_parse_cdb, |
c66ac9db NB |
1187 | .set_configfs_dev_params = pscsi_set_configfs_dev_params, |
1188 | .show_configfs_dev_params = pscsi_show_configfs_dev_params, | |
c66ac9db NB |
1189 | .get_device_rev = pscsi_get_device_rev, |
1190 | .get_device_type = pscsi_get_device_type, | |
1191 | .get_blocks = pscsi_get_blocks, | |
1192 | }; | |
1193 | ||
1194 | static int __init pscsi_module_init(void) | |
1195 | { | |
1196 | return transport_subsystem_register(&pscsi_template); | |
1197 | } | |
1198 | ||
1199 | static void pscsi_module_exit(void) | |
1200 | { | |
1201 | transport_subsystem_release(&pscsi_template); | |
1202 | } | |
1203 | ||
1204 | MODULE_DESCRIPTION("TCM PSCSI subsystem plugin"); | |
1205 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
1206 | MODULE_LICENSE("GPL"); | |
1207 | ||
1208 | module_init(pscsi_module_init); | |
1209 | module_exit(pscsi_module_exit); |