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a511ce33 CB |
1 | /* |
2 | * SBP2 target driver (SCSI over IEEE1394 in target mode) | |
3 | * | |
4 | * Copyright (C) 2011 Chris Boot <bootc@bootc.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
21 | #define KMSG_COMPONENT "sbp_target" | |
22 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/configfs.h> | |
30 | #include <linux/ctype.h> | |
31 | #include <linux/firewire.h> | |
32 | #include <linux/firewire-constants.h> | |
33 | #include <scsi/scsi.h> | |
34 | #include <scsi/scsi_tcq.h> | |
35 | #include <target/target_core_base.h> | |
36 | #include <target/target_core_backend.h> | |
37 | #include <target/target_core_fabric.h> | |
38 | #include <target/target_core_fabric_configfs.h> | |
39 | #include <target/target_core_configfs.h> | |
40 | #include <target/configfs_macros.h> | |
41 | #include <asm/unaligned.h> | |
42 | ||
43 | #include "sbp_target.h" | |
44 | ||
45 | /* Local pointer to allocated TCM configfs fabric module */ | |
46 | static struct target_fabric_configfs *sbp_fabric_configfs; | |
47 | ||
48 | /* FireWire address region for management and command block address handlers */ | |
49 | static const struct fw_address_region sbp_register_region = { | |
50 | .start = CSR_REGISTER_BASE + 0x10000, | |
51 | .end = 0x1000000000000ULL, | |
52 | }; | |
53 | ||
54 | static const u32 sbp_unit_directory_template[] = { | |
55 | 0x1200609e, /* unit_specifier_id: NCITS/T10 */ | |
56 | 0x13010483, /* unit_sw_version: 1155D Rev 4 */ | |
57 | 0x3800609e, /* command_set_specifier_id: NCITS/T10 */ | |
58 | 0x390104d8, /* command_set: SPC-2 */ | |
59 | 0x3b000000, /* command_set_revision: 0 */ | |
60 | 0x3c000001, /* firmware_revision: 1 */ | |
61 | }; | |
62 | ||
63 | #define SESSION_MAINTENANCE_INTERVAL HZ | |
64 | ||
65 | static atomic_t login_id = ATOMIC_INIT(0); | |
66 | ||
67 | static void session_maintenance_work(struct work_struct *); | |
68 | static int sbp_run_transaction(struct fw_card *, int, int, int, int, | |
69 | unsigned long long, void *, size_t); | |
70 | ||
71 | static int read_peer_guid(u64 *guid, const struct sbp_management_request *req) | |
72 | { | |
73 | int ret; | |
74 | __be32 high, low; | |
75 | ||
76 | ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST, | |
77 | req->node_addr, req->generation, req->speed, | |
78 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 3 * 4, | |
79 | &high, sizeof(high)); | |
80 | if (ret != RCODE_COMPLETE) | |
81 | return ret; | |
82 | ||
83 | ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST, | |
84 | req->node_addr, req->generation, req->speed, | |
85 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 4 * 4, | |
86 | &low, sizeof(low)); | |
87 | if (ret != RCODE_COMPLETE) | |
88 | return ret; | |
89 | ||
90 | *guid = (u64)be32_to_cpu(high) << 32 | be32_to_cpu(low); | |
91 | ||
92 | return RCODE_COMPLETE; | |
93 | } | |
94 | ||
95 | static struct sbp_session *sbp_session_find_by_guid( | |
96 | struct sbp_tpg *tpg, u64 guid) | |
97 | { | |
98 | struct se_session *se_sess; | |
99 | struct sbp_session *sess, *found = NULL; | |
100 | ||
101 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
102 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
103 | sess = se_sess->fabric_sess_ptr; | |
104 | if (sess->guid == guid) | |
105 | found = sess; | |
106 | } | |
107 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
108 | ||
109 | return found; | |
110 | } | |
111 | ||
112 | static struct sbp_login_descriptor *sbp_login_find_by_lun( | |
113 | struct sbp_session *session, struct se_lun *lun) | |
114 | { | |
115 | struct sbp_login_descriptor *login, *found = NULL; | |
116 | ||
117 | spin_lock_bh(&session->lock); | |
118 | list_for_each_entry(login, &session->login_list, link) { | |
119 | if (login->lun == lun) | |
120 | found = login; | |
121 | } | |
122 | spin_unlock_bh(&session->lock); | |
123 | ||
124 | return found; | |
125 | } | |
126 | ||
127 | static int sbp_login_count_all_by_lun( | |
128 | struct sbp_tpg *tpg, | |
129 | struct se_lun *lun, | |
130 | int exclusive) | |
131 | { | |
132 | struct se_session *se_sess; | |
133 | struct sbp_session *sess; | |
134 | struct sbp_login_descriptor *login; | |
135 | int count = 0; | |
136 | ||
137 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
138 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
139 | sess = se_sess->fabric_sess_ptr; | |
140 | ||
141 | spin_lock_bh(&sess->lock); | |
142 | list_for_each_entry(login, &sess->login_list, link) { | |
143 | if (login->lun != lun) | |
144 | continue; | |
145 | ||
146 | if (!exclusive || login->exclusive) | |
147 | count++; | |
148 | } | |
149 | spin_unlock_bh(&sess->lock); | |
150 | } | |
151 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
152 | ||
153 | return count; | |
154 | } | |
155 | ||
156 | static struct sbp_login_descriptor *sbp_login_find_by_id( | |
157 | struct sbp_tpg *tpg, int login_id) | |
158 | { | |
159 | struct se_session *se_sess; | |
160 | struct sbp_session *sess; | |
161 | struct sbp_login_descriptor *login, *found = NULL; | |
162 | ||
163 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
164 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
165 | sess = se_sess->fabric_sess_ptr; | |
166 | ||
167 | spin_lock_bh(&sess->lock); | |
168 | list_for_each_entry(login, &sess->login_list, link) { | |
169 | if (login->login_id == login_id) | |
170 | found = login; | |
171 | } | |
172 | spin_unlock_bh(&sess->lock); | |
173 | } | |
174 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
175 | ||
176 | return found; | |
177 | } | |
178 | ||
179 | static struct se_lun *sbp_get_lun_from_tpg(struct sbp_tpg *tpg, int lun) | |
180 | { | |
181 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
182 | struct se_lun *se_lun; | |
183 | ||
184 | if (lun >= TRANSPORT_MAX_LUNS_PER_TPG) | |
185 | return ERR_PTR(-EINVAL); | |
186 | ||
187 | spin_lock(&se_tpg->tpg_lun_lock); | |
188 | se_lun = se_tpg->tpg_lun_list[lun]; | |
189 | ||
190 | if (se_lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) | |
191 | se_lun = ERR_PTR(-ENODEV); | |
192 | ||
193 | spin_unlock(&se_tpg->tpg_lun_lock); | |
194 | ||
195 | return se_lun; | |
196 | } | |
197 | ||
198 | static struct sbp_session *sbp_session_create( | |
199 | struct sbp_tpg *tpg, | |
200 | u64 guid) | |
201 | { | |
202 | struct sbp_session *sess; | |
203 | int ret; | |
204 | char guid_str[17]; | |
205 | struct se_node_acl *se_nacl; | |
206 | ||
207 | sess = kmalloc(sizeof(*sess), GFP_KERNEL); | |
208 | if (!sess) { | |
209 | pr_err("failed to allocate session descriptor\n"); | |
210 | return ERR_PTR(-ENOMEM); | |
211 | } | |
212 | ||
213 | sess->se_sess = transport_init_session(); | |
214 | if (IS_ERR(sess->se_sess)) { | |
215 | pr_err("failed to init se_session\n"); | |
216 | ||
217 | ret = PTR_ERR(sess->se_sess); | |
218 | kfree(sess); | |
219 | return ERR_PTR(ret); | |
220 | } | |
221 | ||
222 | snprintf(guid_str, sizeof(guid_str), "%016llx", guid); | |
223 | ||
224 | se_nacl = core_tpg_check_initiator_node_acl(&tpg->se_tpg, guid_str); | |
225 | if (!se_nacl) { | |
226 | pr_warn("Node ACL not found for %s\n", guid_str); | |
227 | ||
228 | transport_free_session(sess->se_sess); | |
229 | kfree(sess); | |
230 | ||
231 | return ERR_PTR(-EPERM); | |
232 | } | |
233 | ||
234 | sess->se_sess->se_node_acl = se_nacl; | |
235 | ||
236 | spin_lock_init(&sess->lock); | |
237 | INIT_LIST_HEAD(&sess->login_list); | |
238 | INIT_DELAYED_WORK(&sess->maint_work, session_maintenance_work); | |
239 | ||
240 | sess->guid = guid; | |
241 | ||
242 | transport_register_session(&tpg->se_tpg, se_nacl, sess->se_sess, sess); | |
243 | ||
244 | return sess; | |
245 | } | |
246 | ||
247 | static void sbp_session_release(struct sbp_session *sess, bool cancel_work) | |
248 | { | |
249 | spin_lock_bh(&sess->lock); | |
250 | if (!list_empty(&sess->login_list)) { | |
251 | spin_unlock_bh(&sess->lock); | |
252 | return; | |
253 | } | |
254 | spin_unlock_bh(&sess->lock); | |
255 | ||
256 | if (cancel_work) | |
257 | cancel_delayed_work_sync(&sess->maint_work); | |
258 | ||
259 | transport_deregister_session_configfs(sess->se_sess); | |
260 | transport_deregister_session(sess->se_sess); | |
261 | ||
262 | if (sess->card) | |
263 | fw_card_put(sess->card); | |
264 | ||
265 | kfree(sess); | |
266 | } | |
267 | ||
268 | static void sbp_target_agent_unregister(struct sbp_target_agent *); | |
269 | ||
270 | static void sbp_login_release(struct sbp_login_descriptor *login, | |
271 | bool cancel_work) | |
272 | { | |
273 | struct sbp_session *sess = login->sess; | |
274 | ||
275 | /* FIXME: abort/wait on tasks */ | |
276 | ||
277 | sbp_target_agent_unregister(login->tgt_agt); | |
278 | ||
279 | if (sess) { | |
280 | spin_lock_bh(&sess->lock); | |
281 | list_del(&login->link); | |
282 | spin_unlock_bh(&sess->lock); | |
283 | ||
284 | sbp_session_release(sess, cancel_work); | |
285 | } | |
286 | ||
287 | kfree(login); | |
288 | } | |
289 | ||
290 | static struct sbp_target_agent *sbp_target_agent_register( | |
291 | struct sbp_login_descriptor *); | |
292 | ||
293 | static void sbp_management_request_login( | |
294 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
295 | int *status_data_size) | |
296 | { | |
297 | struct sbp_tport *tport = agent->tport; | |
298 | struct sbp_tpg *tpg = tport->tpg; | |
299 | struct se_lun *se_lun; | |
300 | int ret; | |
301 | u64 guid; | |
302 | struct sbp_session *sess; | |
303 | struct sbp_login_descriptor *login; | |
304 | struct sbp_login_response_block *response; | |
305 | int login_response_len; | |
306 | ||
307 | se_lun = sbp_get_lun_from_tpg(tpg, | |
308 | LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc))); | |
309 | if (IS_ERR(se_lun)) { | |
310 | pr_notice("login to unknown LUN: %d\n", | |
311 | LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc))); | |
312 | ||
313 | req->status.status = cpu_to_be32( | |
314 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
315 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LUN_NOTSUPP)); | |
316 | return; | |
317 | } | |
318 | ||
319 | ret = read_peer_guid(&guid, req); | |
320 | if (ret != RCODE_COMPLETE) { | |
321 | pr_warn("failed to read peer GUID: %d\n", ret); | |
322 | ||
323 | req->status.status = cpu_to_be32( | |
324 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
325 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
326 | return; | |
327 | } | |
328 | ||
329 | pr_notice("mgt_agent LOGIN to LUN %d from %016llx\n", | |
330 | se_lun->unpacked_lun, guid); | |
331 | ||
332 | sess = sbp_session_find_by_guid(tpg, guid); | |
333 | if (sess) { | |
334 | login = sbp_login_find_by_lun(sess, se_lun); | |
335 | if (login) { | |
336 | pr_notice("initiator already logged-in\n"); | |
337 | ||
338 | /* | |
339 | * SBP-2 R4 says we should return access denied, but | |
340 | * that can confuse initiators. Instead we need to | |
341 | * treat this like a reconnect, but send the login | |
342 | * response block like a fresh login. | |
343 | * | |
344 | * This is required particularly in the case of Apple | |
345 | * devices booting off the FireWire target, where | |
346 | * the firmware has an active login to the target. When | |
347 | * the OS takes control of the session it issues its own | |
348 | * LOGIN rather than a RECONNECT. To avoid the machine | |
349 | * waiting until the reconnect_hold expires, we can skip | |
350 | * the ACCESS_DENIED errors to speed things up. | |
351 | */ | |
352 | ||
353 | goto already_logged_in; | |
354 | } | |
355 | } | |
356 | ||
357 | /* | |
358 | * check exclusive bit in login request | |
359 | * reject with access_denied if any logins present | |
360 | */ | |
361 | if (LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)) && | |
362 | sbp_login_count_all_by_lun(tpg, se_lun, 0)) { | |
363 | pr_warn("refusing exclusive login with other active logins\n"); | |
364 | ||
365 | req->status.status = cpu_to_be32( | |
366 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
367 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
368 | return; | |
369 | } | |
370 | ||
371 | /* | |
372 | * check exclusive bit in any existing login descriptor | |
373 | * reject with access_denied if any exclusive logins present | |
374 | */ | |
375 | if (sbp_login_count_all_by_lun(tpg, se_lun, 1)) { | |
376 | pr_warn("refusing login while another exclusive login present\n"); | |
377 | ||
378 | req->status.status = cpu_to_be32( | |
379 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
380 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
381 | return; | |
382 | } | |
383 | ||
384 | /* | |
385 | * check we haven't exceeded the number of allowed logins | |
386 | * reject with resources_unavailable if we have | |
387 | */ | |
388 | if (sbp_login_count_all_by_lun(tpg, se_lun, 0) >= | |
389 | tport->max_logins_per_lun) { | |
390 | pr_warn("max number of logins reached\n"); | |
391 | ||
392 | req->status.status = cpu_to_be32( | |
393 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
394 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
395 | return; | |
396 | } | |
397 | ||
398 | if (!sess) { | |
399 | sess = sbp_session_create(tpg, guid); | |
400 | if (IS_ERR(sess)) { | |
401 | switch (PTR_ERR(sess)) { | |
402 | case -EPERM: | |
403 | ret = SBP_STATUS_ACCESS_DENIED; | |
404 | break; | |
405 | default: | |
406 | ret = SBP_STATUS_RESOURCES_UNAVAIL; | |
407 | break; | |
408 | } | |
409 | ||
410 | req->status.status = cpu_to_be32( | |
411 | STATUS_BLOCK_RESP( | |
412 | STATUS_RESP_REQUEST_COMPLETE) | | |
413 | STATUS_BLOCK_SBP_STATUS(ret)); | |
414 | return; | |
415 | } | |
416 | ||
417 | sess->node_id = req->node_addr; | |
418 | sess->card = fw_card_get(req->card); | |
419 | sess->generation = req->generation; | |
420 | sess->speed = req->speed; | |
421 | ||
422 | schedule_delayed_work(&sess->maint_work, | |
423 | SESSION_MAINTENANCE_INTERVAL); | |
424 | } | |
425 | ||
426 | /* only take the latest reconnect_hold into account */ | |
427 | sess->reconnect_hold = min( | |
428 | 1 << LOGIN_ORB_RECONNECT(be32_to_cpu(req->orb.misc)), | |
429 | tport->max_reconnect_timeout) - 1; | |
430 | ||
431 | login = kmalloc(sizeof(*login), GFP_KERNEL); | |
432 | if (!login) { | |
433 | pr_err("failed to allocate login descriptor\n"); | |
434 | ||
435 | sbp_session_release(sess, true); | |
436 | ||
437 | req->status.status = cpu_to_be32( | |
438 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
439 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
440 | return; | |
441 | } | |
442 | ||
443 | login->sess = sess; | |
444 | login->lun = se_lun; | |
445 | login->status_fifo_addr = sbp2_pointer_to_addr(&req->orb.status_fifo); | |
446 | login->exclusive = LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)); | |
447 | login->login_id = atomic_inc_return(&login_id); | |
448 | ||
449 | login->tgt_agt = sbp_target_agent_register(login); | |
450 | if (IS_ERR(login->tgt_agt)) { | |
451 | ret = PTR_ERR(login->tgt_agt); | |
452 | pr_err("failed to map command block handler: %d\n", ret); | |
453 | ||
454 | sbp_session_release(sess, true); | |
455 | kfree(login); | |
456 | ||
457 | req->status.status = cpu_to_be32( | |
458 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
459 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
460 | return; | |
461 | } | |
462 | ||
463 | spin_lock_bh(&sess->lock); | |
464 | list_add_tail(&login->link, &sess->login_list); | |
465 | spin_unlock_bh(&sess->lock); | |
466 | ||
467 | already_logged_in: | |
468 | response = kzalloc(sizeof(*response), GFP_KERNEL); | |
469 | if (!response) { | |
470 | pr_err("failed to allocate login response block\n"); | |
471 | ||
472 | sbp_login_release(login, true); | |
473 | ||
474 | req->status.status = cpu_to_be32( | |
475 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
476 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
477 | return; | |
478 | } | |
479 | ||
480 | login_response_len = clamp_val( | |
481 | LOGIN_ORB_RESPONSE_LENGTH(be32_to_cpu(req->orb.length)), | |
482 | 12, sizeof(*response)); | |
483 | response->misc = cpu_to_be32( | |
484 | ((login_response_len & 0xffff) << 16) | | |
485 | (login->login_id & 0xffff)); | |
486 | response->reconnect_hold = cpu_to_be32(sess->reconnect_hold & 0xffff); | |
487 | addr_to_sbp2_pointer(login->tgt_agt->handler.offset, | |
488 | &response->command_block_agent); | |
489 | ||
490 | ret = sbp_run_transaction(sess->card, TCODE_WRITE_BLOCK_REQUEST, | |
491 | sess->node_id, sess->generation, sess->speed, | |
492 | sbp2_pointer_to_addr(&req->orb.ptr2), response, | |
493 | login_response_len); | |
494 | if (ret != RCODE_COMPLETE) { | |
495 | pr_debug("failed to write login response block: %x\n", ret); | |
496 | ||
497 | kfree(response); | |
498 | sbp_login_release(login, true); | |
499 | ||
500 | req->status.status = cpu_to_be32( | |
501 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
502 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
503 | return; | |
504 | } | |
505 | ||
506 | kfree(response); | |
507 | ||
508 | req->status.status = cpu_to_be32( | |
509 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
510 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
511 | } | |
512 | ||
513 | static void sbp_management_request_query_logins( | |
514 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
515 | int *status_data_size) | |
516 | { | |
517 | pr_notice("QUERY LOGINS not implemented\n"); | |
518 | /* FIXME: implement */ | |
519 | ||
520 | req->status.status = cpu_to_be32( | |
521 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
522 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
523 | } | |
524 | ||
525 | static void sbp_management_request_reconnect( | |
526 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
527 | int *status_data_size) | |
528 | { | |
529 | struct sbp_tport *tport = agent->tport; | |
530 | struct sbp_tpg *tpg = tport->tpg; | |
531 | int ret; | |
532 | u64 guid; | |
533 | struct sbp_login_descriptor *login; | |
534 | ||
535 | ret = read_peer_guid(&guid, req); | |
536 | if (ret != RCODE_COMPLETE) { | |
537 | pr_warn("failed to read peer GUID: %d\n", ret); | |
538 | ||
539 | req->status.status = cpu_to_be32( | |
540 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
541 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
542 | return; | |
543 | } | |
544 | ||
545 | pr_notice("mgt_agent RECONNECT from %016llx\n", guid); | |
546 | ||
547 | login = sbp_login_find_by_id(tpg, | |
548 | RECONNECT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc))); | |
549 | ||
550 | if (!login) { | |
551 | pr_err("mgt_agent RECONNECT unknown login ID\n"); | |
552 | ||
553 | req->status.status = cpu_to_be32( | |
554 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
555 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
556 | return; | |
557 | } | |
558 | ||
559 | if (login->sess->guid != guid) { | |
560 | pr_err("mgt_agent RECONNECT login GUID doesn't match\n"); | |
561 | ||
562 | req->status.status = cpu_to_be32( | |
563 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
564 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
565 | return; | |
566 | } | |
567 | ||
568 | spin_lock_bh(&login->sess->lock); | |
569 | if (login->sess->card) | |
570 | fw_card_put(login->sess->card); | |
571 | ||
572 | /* update the node details */ | |
573 | login->sess->generation = req->generation; | |
574 | login->sess->node_id = req->node_addr; | |
575 | login->sess->card = fw_card_get(req->card); | |
576 | login->sess->speed = req->speed; | |
577 | spin_unlock_bh(&login->sess->lock); | |
578 | ||
579 | req->status.status = cpu_to_be32( | |
580 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
581 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
582 | } | |
583 | ||
584 | static void sbp_management_request_logout( | |
585 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
586 | int *status_data_size) | |
587 | { | |
588 | struct sbp_tport *tport = agent->tport; | |
589 | struct sbp_tpg *tpg = tport->tpg; | |
5f2a3d61 | 590 | int id; |
a511ce33 CB |
591 | struct sbp_login_descriptor *login; |
592 | ||
5f2a3d61 | 593 | id = LOGOUT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc)); |
a511ce33 | 594 | |
5f2a3d61 | 595 | login = sbp_login_find_by_id(tpg, id); |
a511ce33 | 596 | if (!login) { |
5f2a3d61 | 597 | pr_warn("cannot find login: %d\n", id); |
a511ce33 CB |
598 | |
599 | req->status.status = cpu_to_be32( | |
600 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
601 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LOGIN_ID_UNKNOWN)); | |
602 | return; | |
603 | } | |
604 | ||
605 | pr_info("mgt_agent LOGOUT from LUN %d session %d\n", | |
606 | login->lun->unpacked_lun, login->login_id); | |
607 | ||
608 | if (req->node_addr != login->sess->node_id) { | |
609 | pr_warn("logout from different node ID\n"); | |
610 | ||
611 | req->status.status = cpu_to_be32( | |
612 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
613 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
614 | return; | |
615 | } | |
616 | ||
617 | sbp_login_release(login, true); | |
618 | ||
619 | req->status.status = cpu_to_be32( | |
620 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
621 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
622 | } | |
623 | ||
624 | static void session_check_for_reset(struct sbp_session *sess) | |
625 | { | |
626 | bool card_valid = false; | |
627 | ||
628 | spin_lock_bh(&sess->lock); | |
629 | ||
630 | if (sess->card) { | |
631 | spin_lock_irq(&sess->card->lock); | |
632 | card_valid = (sess->card->local_node != NULL); | |
633 | spin_unlock_irq(&sess->card->lock); | |
634 | ||
635 | if (!card_valid) { | |
636 | fw_card_put(sess->card); | |
637 | sess->card = NULL; | |
638 | } | |
639 | } | |
640 | ||
641 | if (!card_valid || (sess->generation != sess->card->generation)) { | |
642 | pr_info("Waiting for reconnect from node: %016llx\n", | |
643 | sess->guid); | |
644 | ||
645 | sess->node_id = -1; | |
646 | sess->reconnect_expires = get_jiffies_64() + | |
647 | ((sess->reconnect_hold + 1) * HZ); | |
648 | } | |
649 | ||
650 | spin_unlock_bh(&sess->lock); | |
651 | } | |
652 | ||
653 | static void session_reconnect_expired(struct sbp_session *sess) | |
654 | { | |
655 | struct sbp_login_descriptor *login, *temp; | |
656 | LIST_HEAD(login_list); | |
657 | ||
658 | pr_info("Reconnect timer expired for node: %016llx\n", sess->guid); | |
659 | ||
660 | spin_lock_bh(&sess->lock); | |
661 | list_for_each_entry_safe(login, temp, &sess->login_list, link) { | |
662 | login->sess = NULL; | |
663 | list_del(&login->link); | |
664 | list_add_tail(&login->link, &login_list); | |
665 | } | |
666 | spin_unlock_bh(&sess->lock); | |
667 | ||
668 | list_for_each_entry_safe(login, temp, &login_list, link) { | |
669 | list_del(&login->link); | |
670 | sbp_login_release(login, false); | |
671 | } | |
672 | ||
673 | sbp_session_release(sess, false); | |
674 | } | |
675 | ||
676 | static void session_maintenance_work(struct work_struct *work) | |
677 | { | |
678 | struct sbp_session *sess = container_of(work, struct sbp_session, | |
679 | maint_work.work); | |
680 | ||
681 | /* could be called while tearing down the session */ | |
682 | spin_lock_bh(&sess->lock); | |
683 | if (list_empty(&sess->login_list)) { | |
684 | spin_unlock_bh(&sess->lock); | |
685 | return; | |
686 | } | |
687 | spin_unlock_bh(&sess->lock); | |
688 | ||
689 | if (sess->node_id != -1) { | |
690 | /* check for bus reset and make node_id invalid */ | |
691 | session_check_for_reset(sess); | |
692 | ||
693 | schedule_delayed_work(&sess->maint_work, | |
694 | SESSION_MAINTENANCE_INTERVAL); | |
695 | } else if (!time_after64(get_jiffies_64(), sess->reconnect_expires)) { | |
696 | /* still waiting for reconnect */ | |
697 | schedule_delayed_work(&sess->maint_work, | |
698 | SESSION_MAINTENANCE_INTERVAL); | |
699 | } else { | |
700 | /* reconnect timeout has expired */ | |
701 | session_reconnect_expired(sess); | |
702 | } | |
703 | } | |
704 | ||
705 | static int tgt_agent_rw_agent_state(struct fw_card *card, int tcode, void *data, | |
706 | struct sbp_target_agent *agent) | |
707 | { | |
708 | __be32 state; | |
709 | ||
710 | switch (tcode) { | |
711 | case TCODE_READ_QUADLET_REQUEST: | |
712 | pr_debug("tgt_agent AGENT_STATE READ\n"); | |
713 | ||
714 | spin_lock_bh(&agent->lock); | |
715 | state = cpu_to_be32(agent->state); | |
716 | spin_unlock_bh(&agent->lock); | |
717 | memcpy(data, &state, sizeof(state)); | |
718 | ||
719 | return RCODE_COMPLETE; | |
720 | ||
721 | case TCODE_WRITE_QUADLET_REQUEST: | |
722 | /* ignored */ | |
723 | return RCODE_COMPLETE; | |
724 | ||
725 | default: | |
726 | return RCODE_TYPE_ERROR; | |
727 | } | |
728 | } | |
729 | ||
730 | static int tgt_agent_rw_agent_reset(struct fw_card *card, int tcode, void *data, | |
731 | struct sbp_target_agent *agent) | |
732 | { | |
733 | switch (tcode) { | |
734 | case TCODE_WRITE_QUADLET_REQUEST: | |
735 | pr_debug("tgt_agent AGENT_RESET\n"); | |
736 | spin_lock_bh(&agent->lock); | |
737 | agent->state = AGENT_STATE_RESET; | |
738 | spin_unlock_bh(&agent->lock); | |
739 | return RCODE_COMPLETE; | |
740 | ||
741 | default: | |
742 | return RCODE_TYPE_ERROR; | |
743 | } | |
744 | } | |
745 | ||
746 | static int tgt_agent_rw_orb_pointer(struct fw_card *card, int tcode, void *data, | |
747 | struct sbp_target_agent *agent) | |
748 | { | |
749 | struct sbp2_pointer *ptr = data; | |
750 | ||
751 | switch (tcode) { | |
752 | case TCODE_WRITE_BLOCK_REQUEST: | |
753 | spin_lock_bh(&agent->lock); | |
754 | if (agent->state != AGENT_STATE_SUSPENDED && | |
755 | agent->state != AGENT_STATE_RESET) { | |
756 | spin_unlock_bh(&agent->lock); | |
757 | pr_notice("Ignoring ORB_POINTER write while active.\n"); | |
758 | return RCODE_CONFLICT_ERROR; | |
759 | } | |
760 | agent->state = AGENT_STATE_ACTIVE; | |
761 | spin_unlock_bh(&agent->lock); | |
762 | ||
763 | agent->orb_pointer = sbp2_pointer_to_addr(ptr); | |
764 | agent->doorbell = false; | |
765 | ||
766 | pr_debug("tgt_agent ORB_POINTER write: 0x%llx\n", | |
767 | agent->orb_pointer); | |
768 | ||
769 | queue_work(system_unbound_wq, &agent->work); | |
770 | ||
771 | return RCODE_COMPLETE; | |
772 | ||
773 | case TCODE_READ_BLOCK_REQUEST: | |
774 | pr_debug("tgt_agent ORB_POINTER READ\n"); | |
775 | spin_lock_bh(&agent->lock); | |
776 | addr_to_sbp2_pointer(agent->orb_pointer, ptr); | |
777 | spin_unlock_bh(&agent->lock); | |
778 | return RCODE_COMPLETE; | |
779 | ||
780 | default: | |
781 | return RCODE_TYPE_ERROR; | |
782 | } | |
783 | } | |
784 | ||
785 | static int tgt_agent_rw_doorbell(struct fw_card *card, int tcode, void *data, | |
786 | struct sbp_target_agent *agent) | |
787 | { | |
788 | switch (tcode) { | |
789 | case TCODE_WRITE_QUADLET_REQUEST: | |
790 | spin_lock_bh(&agent->lock); | |
791 | if (agent->state != AGENT_STATE_SUSPENDED) { | |
792 | spin_unlock_bh(&agent->lock); | |
793 | pr_debug("Ignoring DOORBELL while active.\n"); | |
794 | return RCODE_CONFLICT_ERROR; | |
795 | } | |
796 | agent->state = AGENT_STATE_ACTIVE; | |
797 | spin_unlock_bh(&agent->lock); | |
798 | ||
799 | agent->doorbell = true; | |
800 | ||
801 | pr_debug("tgt_agent DOORBELL\n"); | |
802 | ||
803 | queue_work(system_unbound_wq, &agent->work); | |
804 | ||
805 | return RCODE_COMPLETE; | |
806 | ||
807 | case TCODE_READ_QUADLET_REQUEST: | |
808 | return RCODE_COMPLETE; | |
809 | ||
810 | default: | |
811 | return RCODE_TYPE_ERROR; | |
812 | } | |
813 | } | |
814 | ||
815 | static int tgt_agent_rw_unsolicited_status_enable(struct fw_card *card, | |
816 | int tcode, void *data, struct sbp_target_agent *agent) | |
817 | { | |
818 | switch (tcode) { | |
819 | case TCODE_WRITE_QUADLET_REQUEST: | |
820 | pr_debug("tgt_agent UNSOLICITED_STATUS_ENABLE\n"); | |
821 | /* ignored as we don't send unsolicited status */ | |
822 | return RCODE_COMPLETE; | |
823 | ||
824 | case TCODE_READ_QUADLET_REQUEST: | |
825 | return RCODE_COMPLETE; | |
826 | ||
827 | default: | |
828 | return RCODE_TYPE_ERROR; | |
829 | } | |
830 | } | |
831 | ||
832 | static void tgt_agent_rw(struct fw_card *card, struct fw_request *request, | |
833 | int tcode, int destination, int source, int generation, | |
834 | unsigned long long offset, void *data, size_t length, | |
835 | void *callback_data) | |
836 | { | |
837 | struct sbp_target_agent *agent = callback_data; | |
838 | struct sbp_session *sess = agent->login->sess; | |
839 | int sess_gen, sess_node, rcode; | |
840 | ||
841 | spin_lock_bh(&sess->lock); | |
842 | sess_gen = sess->generation; | |
843 | sess_node = sess->node_id; | |
844 | spin_unlock_bh(&sess->lock); | |
845 | ||
846 | if (generation != sess_gen) { | |
847 | pr_notice("ignoring request with wrong generation\n"); | |
848 | rcode = RCODE_TYPE_ERROR; | |
849 | goto out; | |
850 | } | |
851 | ||
852 | if (source != sess_node) { | |
853 | pr_notice("ignoring request from foreign node (%x != %x)\n", | |
854 | source, sess_node); | |
855 | rcode = RCODE_TYPE_ERROR; | |
856 | goto out; | |
857 | } | |
858 | ||
859 | /* turn offset into the offset from the start of the block */ | |
860 | offset -= agent->handler.offset; | |
861 | ||
862 | if (offset == 0x00 && length == 4) { | |
863 | /* AGENT_STATE */ | |
864 | rcode = tgt_agent_rw_agent_state(card, tcode, data, agent); | |
865 | } else if (offset == 0x04 && length == 4) { | |
866 | /* AGENT_RESET */ | |
867 | rcode = tgt_agent_rw_agent_reset(card, tcode, data, agent); | |
868 | } else if (offset == 0x08 && length == 8) { | |
869 | /* ORB_POINTER */ | |
870 | rcode = tgt_agent_rw_orb_pointer(card, tcode, data, agent); | |
871 | } else if (offset == 0x10 && length == 4) { | |
872 | /* DOORBELL */ | |
873 | rcode = tgt_agent_rw_doorbell(card, tcode, data, agent); | |
874 | } else if (offset == 0x14 && length == 4) { | |
875 | /* UNSOLICITED_STATUS_ENABLE */ | |
876 | rcode = tgt_agent_rw_unsolicited_status_enable(card, tcode, | |
877 | data, agent); | |
878 | } else { | |
879 | rcode = RCODE_ADDRESS_ERROR; | |
880 | } | |
881 | ||
882 | out: | |
883 | fw_send_response(card, request, rcode); | |
884 | } | |
885 | ||
886 | static void sbp_handle_command(struct sbp_target_request *); | |
887 | static int sbp_send_status(struct sbp_target_request *); | |
888 | static void sbp_free_request(struct sbp_target_request *); | |
889 | ||
890 | static void tgt_agent_process_work(struct work_struct *work) | |
891 | { | |
892 | struct sbp_target_request *req = | |
893 | container_of(work, struct sbp_target_request, work); | |
894 | ||
895 | pr_debug("tgt_orb ptr:0x%llx next_ORB:0x%llx data_descriptor:0x%llx misc:0x%x\n", | |
896 | req->orb_pointer, | |
897 | sbp2_pointer_to_addr(&req->orb.next_orb), | |
898 | sbp2_pointer_to_addr(&req->orb.data_descriptor), | |
899 | be32_to_cpu(req->orb.misc)); | |
900 | ||
901 | if (req->orb_pointer >> 32) | |
902 | pr_debug("ORB with high bits set\n"); | |
903 | ||
904 | switch (ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc))) { | |
905 | case 0:/* Format specified by this standard */ | |
906 | sbp_handle_command(req); | |
907 | return; | |
908 | case 1: /* Reserved for future standardization */ | |
909 | case 2: /* Vendor-dependent */ | |
910 | req->status.status |= cpu_to_be32( | |
911 | STATUS_BLOCK_RESP( | |
912 | STATUS_RESP_REQUEST_COMPLETE) | | |
913 | STATUS_BLOCK_DEAD(0) | | |
914 | STATUS_BLOCK_LEN(1) | | |
915 | STATUS_BLOCK_SBP_STATUS( | |
916 | SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
917 | sbp_send_status(req); | |
918 | sbp_free_request(req); | |
919 | return; | |
920 | case 3: /* Dummy ORB */ | |
921 | req->status.status |= cpu_to_be32( | |
922 | STATUS_BLOCK_RESP( | |
923 | STATUS_RESP_REQUEST_COMPLETE) | | |
924 | STATUS_BLOCK_DEAD(0) | | |
925 | STATUS_BLOCK_LEN(1) | | |
926 | STATUS_BLOCK_SBP_STATUS( | |
927 | SBP_STATUS_DUMMY_ORB_COMPLETE)); | |
928 | sbp_send_status(req); | |
929 | sbp_free_request(req); | |
930 | return; | |
931 | default: | |
932 | BUG(); | |
933 | } | |
934 | } | |
935 | ||
936 | /* used to double-check we haven't been issued an AGENT_RESET */ | |
937 | static inline bool tgt_agent_check_active(struct sbp_target_agent *agent) | |
938 | { | |
939 | bool active; | |
940 | ||
941 | spin_lock_bh(&agent->lock); | |
942 | active = (agent->state == AGENT_STATE_ACTIVE); | |
943 | spin_unlock_bh(&agent->lock); | |
944 | ||
945 | return active; | |
946 | } | |
947 | ||
948 | static void tgt_agent_fetch_work(struct work_struct *work) | |
949 | { | |
950 | struct sbp_target_agent *agent = | |
951 | container_of(work, struct sbp_target_agent, work); | |
952 | struct sbp_session *sess = agent->login->sess; | |
953 | struct sbp_target_request *req; | |
954 | int ret; | |
955 | bool doorbell = agent->doorbell; | |
956 | u64 next_orb = agent->orb_pointer; | |
957 | ||
958 | while (next_orb && tgt_agent_check_active(agent)) { | |
959 | req = kzalloc(sizeof(*req), GFP_KERNEL); | |
960 | if (!req) { | |
961 | spin_lock_bh(&agent->lock); | |
962 | agent->state = AGENT_STATE_DEAD; | |
963 | spin_unlock_bh(&agent->lock); | |
964 | return; | |
965 | } | |
966 | ||
967 | req->login = agent->login; | |
968 | req->orb_pointer = next_orb; | |
969 | ||
970 | req->status.status = cpu_to_be32(STATUS_BLOCK_ORB_OFFSET_HIGH( | |
971 | req->orb_pointer >> 32)); | |
972 | req->status.orb_low = cpu_to_be32( | |
973 | req->orb_pointer & 0xfffffffc); | |
974 | ||
975 | /* read in the ORB */ | |
976 | ret = sbp_run_transaction(sess->card, TCODE_READ_BLOCK_REQUEST, | |
977 | sess->node_id, sess->generation, sess->speed, | |
978 | req->orb_pointer, &req->orb, sizeof(req->orb)); | |
979 | if (ret != RCODE_COMPLETE) { | |
980 | pr_debug("tgt_orb fetch failed: %x\n", ret); | |
981 | req->status.status |= cpu_to_be32( | |
982 | STATUS_BLOCK_SRC( | |
983 | STATUS_SRC_ORB_FINISHED) | | |
984 | STATUS_BLOCK_RESP( | |
985 | STATUS_RESP_TRANSPORT_FAILURE) | | |
986 | STATUS_BLOCK_DEAD(1) | | |
987 | STATUS_BLOCK_LEN(1) | | |
988 | STATUS_BLOCK_SBP_STATUS( | |
989 | SBP_STATUS_UNSPECIFIED_ERROR)); | |
990 | spin_lock_bh(&agent->lock); | |
991 | agent->state = AGENT_STATE_DEAD; | |
992 | spin_unlock_bh(&agent->lock); | |
993 | ||
994 | sbp_send_status(req); | |
995 | sbp_free_request(req); | |
996 | return; | |
997 | } | |
998 | ||
999 | /* check the next_ORB field */ | |
1000 | if (be32_to_cpu(req->orb.next_orb.high) & 0x80000000) { | |
1001 | next_orb = 0; | |
1002 | req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC( | |
1003 | STATUS_SRC_ORB_FINISHED)); | |
1004 | } else { | |
1005 | next_orb = sbp2_pointer_to_addr(&req->orb.next_orb); | |
1006 | req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC( | |
1007 | STATUS_SRC_ORB_CONTINUING)); | |
1008 | } | |
1009 | ||
1010 | if (tgt_agent_check_active(agent) && !doorbell) { | |
1011 | INIT_WORK(&req->work, tgt_agent_process_work); | |
1012 | queue_work(system_unbound_wq, &req->work); | |
1013 | } else { | |
1014 | /* don't process this request, just check next_ORB */ | |
1015 | sbp_free_request(req); | |
1016 | } | |
1017 | ||
1018 | spin_lock_bh(&agent->lock); | |
1019 | doorbell = agent->doorbell = false; | |
1020 | ||
1021 | /* check if we should carry on processing */ | |
1022 | if (next_orb) | |
1023 | agent->orb_pointer = next_orb; | |
1024 | else | |
1025 | agent->state = AGENT_STATE_SUSPENDED; | |
1026 | ||
1027 | spin_unlock_bh(&agent->lock); | |
1028 | }; | |
1029 | } | |
1030 | ||
1031 | static struct sbp_target_agent *sbp_target_agent_register( | |
1032 | struct sbp_login_descriptor *login) | |
1033 | { | |
1034 | struct sbp_target_agent *agent; | |
1035 | int ret; | |
1036 | ||
1037 | agent = kmalloc(sizeof(*agent), GFP_KERNEL); | |
1038 | if (!agent) | |
1039 | return ERR_PTR(-ENOMEM); | |
1040 | ||
1041 | spin_lock_init(&agent->lock); | |
1042 | ||
1043 | agent->handler.length = 0x20; | |
1044 | agent->handler.address_callback = tgt_agent_rw; | |
1045 | agent->handler.callback_data = agent; | |
1046 | ||
1047 | agent->login = login; | |
1048 | agent->state = AGENT_STATE_RESET; | |
1049 | INIT_WORK(&agent->work, tgt_agent_fetch_work); | |
1050 | agent->orb_pointer = 0; | |
1051 | agent->doorbell = false; | |
1052 | ||
1053 | ret = fw_core_add_address_handler(&agent->handler, | |
1054 | &sbp_register_region); | |
1055 | if (ret < 0) { | |
1056 | kfree(agent); | |
1057 | return ERR_PTR(ret); | |
1058 | } | |
1059 | ||
1060 | return agent; | |
1061 | } | |
1062 | ||
1063 | static void sbp_target_agent_unregister(struct sbp_target_agent *agent) | |
1064 | { | |
1065 | fw_core_remove_address_handler(&agent->handler); | |
1066 | cancel_work_sync(&agent->work); | |
1067 | kfree(agent); | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * Simple wrapper around fw_run_transaction that retries the transaction several | |
1072 | * times in case of failure, with an exponential backoff. | |
1073 | */ | |
1074 | static int sbp_run_transaction(struct fw_card *card, int tcode, int destination_id, | |
1075 | int generation, int speed, unsigned long long offset, | |
1076 | void *payload, size_t length) | |
1077 | { | |
1078 | int attempt, ret, delay; | |
1079 | ||
1080 | for (attempt = 1; attempt <= 5; attempt++) { | |
1081 | ret = fw_run_transaction(card, tcode, destination_id, | |
1082 | generation, speed, offset, payload, length); | |
1083 | ||
1084 | switch (ret) { | |
1085 | case RCODE_COMPLETE: | |
1086 | case RCODE_TYPE_ERROR: | |
1087 | case RCODE_ADDRESS_ERROR: | |
1088 | case RCODE_GENERATION: | |
1089 | return ret; | |
1090 | ||
1091 | default: | |
1092 | delay = 5 * attempt * attempt; | |
1093 | usleep_range(delay, delay * 2); | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | return ret; | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Wrapper around sbp_run_transaction that gets the card, destination, | |
1102 | * generation and speed out of the request's session. | |
1103 | */ | |
1104 | static int sbp_run_request_transaction(struct sbp_target_request *req, | |
1105 | int tcode, unsigned long long offset, void *payload, | |
1106 | size_t length) | |
1107 | { | |
1108 | struct sbp_login_descriptor *login = req->login; | |
1109 | struct sbp_session *sess = login->sess; | |
1110 | struct fw_card *card; | |
1111 | int node_id, generation, speed, ret; | |
1112 | ||
1113 | spin_lock_bh(&sess->lock); | |
1114 | card = fw_card_get(sess->card); | |
1115 | node_id = sess->node_id; | |
1116 | generation = sess->generation; | |
1117 | speed = sess->speed; | |
1118 | spin_unlock_bh(&sess->lock); | |
1119 | ||
1120 | ret = sbp_run_transaction(card, tcode, node_id, generation, speed, | |
1121 | offset, payload, length); | |
1122 | ||
1123 | fw_card_put(card); | |
1124 | ||
1125 | return ret; | |
1126 | } | |
1127 | ||
1128 | static int sbp_fetch_command(struct sbp_target_request *req) | |
1129 | { | |
1130 | int ret, cmd_len, copy_len; | |
1131 | ||
1132 | cmd_len = scsi_command_size(req->orb.command_block); | |
1133 | ||
1134 | req->cmd_buf = kmalloc(cmd_len, GFP_KERNEL); | |
1135 | if (!req->cmd_buf) | |
1136 | return -ENOMEM; | |
1137 | ||
1138 | memcpy(req->cmd_buf, req->orb.command_block, | |
1139 | min_t(int, cmd_len, sizeof(req->orb.command_block))); | |
1140 | ||
1141 | if (cmd_len > sizeof(req->orb.command_block)) { | |
1142 | pr_debug("sbp_fetch_command: filling in long command\n"); | |
1143 | copy_len = cmd_len - sizeof(req->orb.command_block); | |
1144 | ||
1145 | ret = sbp_run_request_transaction(req, | |
1146 | TCODE_READ_BLOCK_REQUEST, | |
1147 | req->orb_pointer + sizeof(req->orb), | |
1148 | req->cmd_buf + sizeof(req->orb.command_block), | |
1149 | copy_len); | |
1150 | if (ret != RCODE_COMPLETE) | |
1151 | return -EIO; | |
1152 | } | |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | static int sbp_fetch_page_table(struct sbp_target_request *req) | |
1158 | { | |
1159 | int pg_tbl_sz, ret; | |
1160 | struct sbp_page_table_entry *pg_tbl; | |
1161 | ||
1162 | if (!CMDBLK_ORB_PG_TBL_PRESENT(be32_to_cpu(req->orb.misc))) | |
1163 | return 0; | |
1164 | ||
1165 | pg_tbl_sz = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)) * | |
1166 | sizeof(struct sbp_page_table_entry); | |
1167 | ||
1168 | pg_tbl = kmalloc(pg_tbl_sz, GFP_KERNEL); | |
1169 | if (!pg_tbl) | |
1170 | return -ENOMEM; | |
1171 | ||
1172 | ret = sbp_run_request_transaction(req, TCODE_READ_BLOCK_REQUEST, | |
1173 | sbp2_pointer_to_addr(&req->orb.data_descriptor), | |
1174 | pg_tbl, pg_tbl_sz); | |
1175 | if (ret != RCODE_COMPLETE) { | |
1176 | kfree(pg_tbl); | |
1177 | return -EIO; | |
1178 | } | |
1179 | ||
1180 | req->pg_tbl = pg_tbl; | |
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | static void sbp_calc_data_length_direction(struct sbp_target_request *req, | |
1185 | u32 *data_len, enum dma_data_direction *data_dir) | |
1186 | { | |
1187 | int data_size, direction, idx; | |
1188 | ||
1189 | data_size = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)); | |
1190 | direction = CMDBLK_ORB_DIRECTION(be32_to_cpu(req->orb.misc)); | |
1191 | ||
1192 | if (!data_size) { | |
1193 | *data_len = 0; | |
1194 | *data_dir = DMA_NONE; | |
1195 | return; | |
1196 | } | |
1197 | ||
1198 | *data_dir = direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1199 | ||
1200 | if (req->pg_tbl) { | |
1201 | *data_len = 0; | |
1202 | for (idx = 0; idx < data_size; idx++) { | |
1203 | *data_len += be16_to_cpu( | |
1204 | req->pg_tbl[idx].segment_length); | |
1205 | } | |
1206 | } else { | |
1207 | *data_len = data_size; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | static void sbp_handle_command(struct sbp_target_request *req) | |
1212 | { | |
1213 | struct sbp_login_descriptor *login = req->login; | |
1214 | struct sbp_session *sess = login->sess; | |
1215 | int ret, unpacked_lun; | |
1216 | u32 data_length; | |
1217 | enum dma_data_direction data_dir; | |
1218 | ||
1219 | ret = sbp_fetch_command(req); | |
1220 | if (ret) { | |
1221 | pr_debug("sbp_handle_command: fetch command failed: %d\n", ret); | |
1222 | req->status.status |= cpu_to_be32( | |
1223 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1224 | STATUS_BLOCK_DEAD(0) | | |
1225 | STATUS_BLOCK_LEN(1) | | |
1226 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1227 | sbp_send_status(req); | |
1228 | sbp_free_request(req); | |
1229 | return; | |
1230 | } | |
1231 | ||
1232 | ret = sbp_fetch_page_table(req); | |
1233 | if (ret) { | |
1234 | pr_debug("sbp_handle_command: fetch page table failed: %d\n", | |
1235 | ret); | |
1236 | req->status.status |= cpu_to_be32( | |
1237 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1238 | STATUS_BLOCK_DEAD(0) | | |
1239 | STATUS_BLOCK_LEN(1) | | |
1240 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1241 | sbp_send_status(req); | |
1242 | sbp_free_request(req); | |
1243 | return; | |
1244 | } | |
1245 | ||
1246 | unpacked_lun = req->login->lun->unpacked_lun; | |
1247 | sbp_calc_data_length_direction(req, &data_length, &data_dir); | |
1248 | ||
1249 | pr_debug("sbp_handle_command ORB:0x%llx unpacked_lun:%d data_len:%d data_dir:%d\n", | |
1250 | req->orb_pointer, unpacked_lun, data_length, data_dir); | |
1251 | ||
1252 | target_submit_cmd(&req->se_cmd, sess->se_sess, req->cmd_buf, | |
1253 | req->sense_buf, unpacked_lun, data_length, | |
1254 | MSG_SIMPLE_TAG, data_dir, 0); | |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * DMA_TO_DEVICE = read from initiator (SCSI WRITE) | |
1259 | * DMA_FROM_DEVICE = write to initiator (SCSI READ) | |
1260 | */ | |
1261 | static int sbp_rw_data(struct sbp_target_request *req) | |
1262 | { | |
1263 | struct sbp_session *sess = req->login->sess; | |
1264 | int tcode, sg_miter_flags, max_payload, pg_size, speed, node_id, | |
1265 | generation, num_pte, length, tfr_length, | |
1266 | rcode = RCODE_COMPLETE; | |
1267 | struct sbp_page_table_entry *pte; | |
1268 | unsigned long long offset; | |
1269 | struct fw_card *card; | |
1270 | struct sg_mapping_iter iter; | |
1271 | ||
1272 | if (req->se_cmd.data_direction == DMA_FROM_DEVICE) { | |
1273 | tcode = TCODE_WRITE_BLOCK_REQUEST; | |
1274 | sg_miter_flags = SG_MITER_FROM_SG; | |
1275 | } else { | |
1276 | tcode = TCODE_READ_BLOCK_REQUEST; | |
1277 | sg_miter_flags = SG_MITER_TO_SG; | |
1278 | } | |
1279 | ||
1280 | max_payload = 4 << CMDBLK_ORB_MAX_PAYLOAD(be32_to_cpu(req->orb.misc)); | |
1281 | speed = CMDBLK_ORB_SPEED(be32_to_cpu(req->orb.misc)); | |
1282 | ||
1283 | pg_size = CMDBLK_ORB_PG_SIZE(be32_to_cpu(req->orb.misc)); | |
1284 | if (pg_size) { | |
1285 | pr_err("sbp_run_transaction: page size ignored\n"); | |
1286 | pg_size = 0x100 << pg_size; | |
1287 | } | |
1288 | ||
1289 | spin_lock_bh(&sess->lock); | |
1290 | card = fw_card_get(sess->card); | |
1291 | node_id = sess->node_id; | |
1292 | generation = sess->generation; | |
1293 | spin_unlock_bh(&sess->lock); | |
1294 | ||
1295 | if (req->pg_tbl) { | |
1296 | pte = req->pg_tbl; | |
1297 | num_pte = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)); | |
1298 | ||
1299 | offset = 0; | |
1300 | length = 0; | |
1301 | } else { | |
1302 | pte = NULL; | |
1303 | num_pte = 0; | |
1304 | ||
1305 | offset = sbp2_pointer_to_addr(&req->orb.data_descriptor); | |
1306 | length = req->se_cmd.data_length; | |
1307 | } | |
1308 | ||
1309 | sg_miter_start(&iter, req->se_cmd.t_data_sg, req->se_cmd.t_data_nents, | |
1310 | sg_miter_flags); | |
1311 | ||
1312 | while (length || num_pte) { | |
1313 | if (!length) { | |
1314 | offset = (u64)be16_to_cpu(pte->segment_base_hi) << 32 | | |
1315 | be32_to_cpu(pte->segment_base_lo); | |
1316 | length = be16_to_cpu(pte->segment_length); | |
1317 | ||
1318 | pte++; | |
1319 | num_pte--; | |
1320 | } | |
1321 | ||
1322 | sg_miter_next(&iter); | |
1323 | ||
1324 | tfr_length = min3(length, max_payload, (int)iter.length); | |
1325 | ||
1326 | /* FIXME: take page_size into account */ | |
1327 | ||
1328 | rcode = sbp_run_transaction(card, tcode, node_id, | |
1329 | generation, speed, | |
1330 | offset, iter.addr, tfr_length); | |
1331 | ||
1332 | if (rcode != RCODE_COMPLETE) | |
1333 | break; | |
1334 | ||
1335 | length -= tfr_length; | |
1336 | offset += tfr_length; | |
1337 | iter.consumed = tfr_length; | |
1338 | } | |
1339 | ||
1340 | sg_miter_stop(&iter); | |
1341 | fw_card_put(card); | |
1342 | ||
1343 | if (rcode == RCODE_COMPLETE) { | |
1344 | WARN_ON(length != 0); | |
1345 | return 0; | |
1346 | } else { | |
1347 | return -EIO; | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | static int sbp_send_status(struct sbp_target_request *req) | |
1352 | { | |
1353 | int ret, length; | |
1354 | struct sbp_login_descriptor *login = req->login; | |
1355 | ||
1356 | length = (((be32_to_cpu(req->status.status) >> 24) & 0x07) + 1) * 4; | |
1357 | ||
1358 | ret = sbp_run_request_transaction(req, TCODE_WRITE_BLOCK_REQUEST, | |
1359 | login->status_fifo_addr, &req->status, length); | |
1360 | if (ret != RCODE_COMPLETE) { | |
1361 | pr_debug("sbp_send_status: write failed: 0x%x\n", ret); | |
1362 | return -EIO; | |
1363 | } | |
1364 | ||
1365 | pr_debug("sbp_send_status: status write complete for ORB: 0x%llx\n", | |
1366 | req->orb_pointer); | |
1367 | ||
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | static void sbp_sense_mangle(struct sbp_target_request *req) | |
1372 | { | |
1373 | struct se_cmd *se_cmd = &req->se_cmd; | |
1374 | u8 *sense = req->sense_buf; | |
1375 | u8 *status = req->status.data; | |
1376 | ||
1377 | WARN_ON(se_cmd->scsi_sense_length < 18); | |
1378 | ||
1379 | switch (sense[0] & 0x7f) { /* sfmt */ | |
1380 | case 0x70: /* current, fixed */ | |
1381 | status[0] = 0 << 6; | |
1382 | break; | |
1383 | case 0x71: /* deferred, fixed */ | |
1384 | status[0] = 1 << 6; | |
1385 | break; | |
1386 | case 0x72: /* current, descriptor */ | |
1387 | case 0x73: /* deferred, descriptor */ | |
1388 | default: | |
1389 | /* | |
1390 | * TODO: SBP-3 specifies what we should do with descriptor | |
1391 | * format sense data | |
1392 | */ | |
1393 | pr_err("sbp_send_sense: unknown sense format: 0x%x\n", | |
1394 | sense[0]); | |
1395 | req->status.status |= cpu_to_be32( | |
1396 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1397 | STATUS_BLOCK_DEAD(0) | | |
1398 | STATUS_BLOCK_LEN(1) | | |
1399 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQUEST_ABORTED)); | |
1400 | return; | |
1401 | } | |
1402 | ||
1403 | status[0] |= se_cmd->scsi_status & 0x3f;/* status */ | |
1404 | status[1] = | |
1405 | (sense[0] & 0x80) | /* valid */ | |
1406 | ((sense[2] & 0xe0) >> 1) | /* mark, eom, ili */ | |
1407 | (sense[2] & 0x0f); /* sense_key */ | |
1408 | status[2] = se_cmd->scsi_asc; /* sense_code */ | |
1409 | status[3] = se_cmd->scsi_ascq; /* sense_qualifier */ | |
1410 | ||
1411 | /* information */ | |
1412 | status[4] = sense[3]; | |
1413 | status[5] = sense[4]; | |
1414 | status[6] = sense[5]; | |
1415 | status[7] = sense[6]; | |
1416 | ||
1417 | /* CDB-dependent */ | |
1418 | status[8] = sense[8]; | |
1419 | status[9] = sense[9]; | |
1420 | status[10] = sense[10]; | |
1421 | status[11] = sense[11]; | |
1422 | ||
1423 | /* fru */ | |
1424 | status[12] = sense[14]; | |
1425 | ||
1426 | /* sense_key-dependent */ | |
1427 | status[13] = sense[15]; | |
1428 | status[14] = sense[16]; | |
1429 | status[15] = sense[17]; | |
1430 | ||
1431 | req->status.status |= cpu_to_be32( | |
1432 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1433 | STATUS_BLOCK_DEAD(0) | | |
1434 | STATUS_BLOCK_LEN(5) | | |
1435 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
1436 | } | |
1437 | ||
1438 | static int sbp_send_sense(struct sbp_target_request *req) | |
1439 | { | |
1440 | struct se_cmd *se_cmd = &req->se_cmd; | |
1441 | ||
1442 | if (se_cmd->scsi_sense_length) { | |
1443 | sbp_sense_mangle(req); | |
1444 | } else { | |
1445 | req->status.status |= cpu_to_be32( | |
1446 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1447 | STATUS_BLOCK_DEAD(0) | | |
1448 | STATUS_BLOCK_LEN(1) | | |
1449 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
1450 | } | |
1451 | ||
1452 | return sbp_send_status(req); | |
1453 | } | |
1454 | ||
1455 | static void sbp_free_request(struct sbp_target_request *req) | |
1456 | { | |
1457 | kfree(req->pg_tbl); | |
1458 | kfree(req->cmd_buf); | |
1459 | kfree(req); | |
1460 | } | |
1461 | ||
1462 | static void sbp_mgt_agent_process(struct work_struct *work) | |
1463 | { | |
1464 | struct sbp_management_agent *agent = | |
1465 | container_of(work, struct sbp_management_agent, work); | |
1466 | struct sbp_management_request *req = agent->request; | |
1467 | int ret; | |
1468 | int status_data_len = 0; | |
1469 | ||
1470 | /* fetch the ORB from the initiator */ | |
1471 | ret = sbp_run_transaction(req->card, TCODE_READ_BLOCK_REQUEST, | |
1472 | req->node_addr, req->generation, req->speed, | |
1473 | agent->orb_offset, &req->orb, sizeof(req->orb)); | |
1474 | if (ret != RCODE_COMPLETE) { | |
1475 | pr_debug("mgt_orb fetch failed: %x\n", ret); | |
1476 | goto out; | |
1477 | } | |
1478 | ||
1479 | pr_debug("mgt_orb ptr1:0x%llx ptr2:0x%llx misc:0x%x len:0x%x status_fifo:0x%llx\n", | |
1480 | sbp2_pointer_to_addr(&req->orb.ptr1), | |
1481 | sbp2_pointer_to_addr(&req->orb.ptr2), | |
1482 | be32_to_cpu(req->orb.misc), be32_to_cpu(req->orb.length), | |
1483 | sbp2_pointer_to_addr(&req->orb.status_fifo)); | |
1484 | ||
1485 | if (!ORB_NOTIFY(be32_to_cpu(req->orb.misc)) || | |
1486 | ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc)) != 0) { | |
1487 | pr_err("mgt_orb bad request\n"); | |
1488 | goto out; | |
1489 | } | |
1490 | ||
1491 | switch (MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))) { | |
1492 | case MANAGEMENT_ORB_FUNCTION_LOGIN: | |
1493 | sbp_management_request_login(agent, req, &status_data_len); | |
1494 | break; | |
1495 | ||
1496 | case MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS: | |
1497 | sbp_management_request_query_logins(agent, req, | |
1498 | &status_data_len); | |
1499 | break; | |
1500 | ||
1501 | case MANAGEMENT_ORB_FUNCTION_RECONNECT: | |
1502 | sbp_management_request_reconnect(agent, req, &status_data_len); | |
1503 | break; | |
1504 | ||
1505 | case MANAGEMENT_ORB_FUNCTION_SET_PASSWORD: | |
1506 | pr_notice("SET PASSWORD not implemented\n"); | |
1507 | ||
1508 | req->status.status = cpu_to_be32( | |
1509 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1510 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1511 | ||
1512 | break; | |
1513 | ||
1514 | case MANAGEMENT_ORB_FUNCTION_LOGOUT: | |
1515 | sbp_management_request_logout(agent, req, &status_data_len); | |
1516 | break; | |
1517 | ||
1518 | case MANAGEMENT_ORB_FUNCTION_ABORT_TASK: | |
1519 | pr_notice("ABORT TASK not implemented\n"); | |
1520 | ||
1521 | req->status.status = cpu_to_be32( | |
1522 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1523 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1524 | ||
1525 | break; | |
1526 | ||
1527 | case MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET: | |
1528 | pr_notice("ABORT TASK SET not implemented\n"); | |
1529 | ||
1530 | req->status.status = cpu_to_be32( | |
1531 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1532 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1533 | ||
1534 | break; | |
1535 | ||
1536 | case MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET: | |
1537 | pr_notice("LOGICAL UNIT RESET not implemented\n"); | |
1538 | ||
1539 | req->status.status = cpu_to_be32( | |
1540 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1541 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1542 | ||
1543 | break; | |
1544 | ||
1545 | case MANAGEMENT_ORB_FUNCTION_TARGET_RESET: | |
1546 | pr_notice("TARGET RESET not implemented\n"); | |
1547 | ||
1548 | req->status.status = cpu_to_be32( | |
1549 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1550 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1551 | ||
1552 | break; | |
1553 | ||
1554 | default: | |
1555 | pr_notice("unknown management function 0x%x\n", | |
1556 | MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))); | |
1557 | ||
1558 | req->status.status = cpu_to_be32( | |
1559 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1560 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1561 | ||
1562 | break; | |
1563 | } | |
1564 | ||
1565 | req->status.status |= cpu_to_be32( | |
1566 | STATUS_BLOCK_SRC(1) | /* Response to ORB, next_ORB absent */ | |
1567 | STATUS_BLOCK_LEN(DIV_ROUND_UP(status_data_len, 4) + 1) | | |
1568 | STATUS_BLOCK_ORB_OFFSET_HIGH(agent->orb_offset >> 32)); | |
1569 | req->status.orb_low = cpu_to_be32(agent->orb_offset); | |
1570 | ||
1571 | /* write the status block back to the initiator */ | |
1572 | ret = sbp_run_transaction(req->card, TCODE_WRITE_BLOCK_REQUEST, | |
1573 | req->node_addr, req->generation, req->speed, | |
1574 | sbp2_pointer_to_addr(&req->orb.status_fifo), | |
1575 | &req->status, 8 + status_data_len); | |
1576 | if (ret != RCODE_COMPLETE) { | |
1577 | pr_debug("mgt_orb status write failed: %x\n", ret); | |
1578 | goto out; | |
1579 | } | |
1580 | ||
1581 | out: | |
1582 | fw_card_put(req->card); | |
1583 | kfree(req); | |
1584 | ||
1585 | spin_lock_bh(&agent->lock); | |
1586 | agent->state = MANAGEMENT_AGENT_STATE_IDLE; | |
1587 | spin_unlock_bh(&agent->lock); | |
1588 | } | |
1589 | ||
1590 | static void sbp_mgt_agent_rw(struct fw_card *card, | |
1591 | struct fw_request *request, int tcode, int destination, int source, | |
1592 | int generation, unsigned long long offset, void *data, size_t length, | |
1593 | void *callback_data) | |
1594 | { | |
1595 | struct sbp_management_agent *agent = callback_data; | |
1596 | struct sbp2_pointer *ptr = data; | |
1597 | int rcode = RCODE_ADDRESS_ERROR; | |
1598 | ||
1599 | if (!agent->tport->enable) | |
1600 | goto out; | |
1601 | ||
1602 | if ((offset != agent->handler.offset) || (length != 8)) | |
1603 | goto out; | |
1604 | ||
1605 | if (tcode == TCODE_WRITE_BLOCK_REQUEST) { | |
1606 | struct sbp_management_request *req; | |
1607 | int prev_state; | |
1608 | ||
1609 | spin_lock_bh(&agent->lock); | |
1610 | prev_state = agent->state; | |
1611 | agent->state = MANAGEMENT_AGENT_STATE_BUSY; | |
1612 | spin_unlock_bh(&agent->lock); | |
1613 | ||
1614 | if (prev_state == MANAGEMENT_AGENT_STATE_BUSY) { | |
1615 | pr_notice("ignoring management request while busy\n"); | |
1616 | rcode = RCODE_CONFLICT_ERROR; | |
1617 | goto out; | |
1618 | } | |
1619 | ||
1620 | req = kzalloc(sizeof(*req), GFP_ATOMIC); | |
1621 | if (!req) { | |
1622 | rcode = RCODE_CONFLICT_ERROR; | |
1623 | goto out; | |
1624 | } | |
1625 | ||
1626 | req->card = fw_card_get(card); | |
1627 | req->generation = generation; | |
1628 | req->node_addr = source; | |
1629 | req->speed = fw_get_request_speed(request); | |
1630 | ||
1631 | agent->orb_offset = sbp2_pointer_to_addr(ptr); | |
1632 | agent->request = req; | |
1633 | ||
1634 | queue_work(system_unbound_wq, &agent->work); | |
1635 | rcode = RCODE_COMPLETE; | |
1636 | } else if (tcode == TCODE_READ_BLOCK_REQUEST) { | |
1637 | addr_to_sbp2_pointer(agent->orb_offset, ptr); | |
1638 | rcode = RCODE_COMPLETE; | |
1639 | } else { | |
1640 | rcode = RCODE_TYPE_ERROR; | |
1641 | } | |
1642 | ||
1643 | out: | |
1644 | fw_send_response(card, request, rcode); | |
1645 | } | |
1646 | ||
1647 | static struct sbp_management_agent *sbp_management_agent_register( | |
1648 | struct sbp_tport *tport) | |
1649 | { | |
1650 | int ret; | |
1651 | struct sbp_management_agent *agent; | |
1652 | ||
1653 | agent = kmalloc(sizeof(*agent), GFP_KERNEL); | |
1654 | if (!agent) | |
1655 | return ERR_PTR(-ENOMEM); | |
1656 | ||
1657 | spin_lock_init(&agent->lock); | |
1658 | agent->tport = tport; | |
1659 | agent->handler.length = 0x08; | |
1660 | agent->handler.address_callback = sbp_mgt_agent_rw; | |
1661 | agent->handler.callback_data = agent; | |
1662 | agent->state = MANAGEMENT_AGENT_STATE_IDLE; | |
1663 | INIT_WORK(&agent->work, sbp_mgt_agent_process); | |
1664 | agent->orb_offset = 0; | |
1665 | agent->request = NULL; | |
1666 | ||
1667 | ret = fw_core_add_address_handler(&agent->handler, | |
1668 | &sbp_register_region); | |
1669 | if (ret < 0) { | |
1670 | kfree(agent); | |
1671 | return ERR_PTR(ret); | |
1672 | } | |
1673 | ||
1674 | return agent; | |
1675 | } | |
1676 | ||
1677 | static void sbp_management_agent_unregister(struct sbp_management_agent *agent) | |
1678 | { | |
1679 | fw_core_remove_address_handler(&agent->handler); | |
1680 | cancel_work_sync(&agent->work); | |
1681 | kfree(agent); | |
1682 | } | |
1683 | ||
1684 | static int sbp_check_true(struct se_portal_group *se_tpg) | |
1685 | { | |
1686 | return 1; | |
1687 | } | |
1688 | ||
1689 | static int sbp_check_false(struct se_portal_group *se_tpg) | |
1690 | { | |
1691 | return 0; | |
1692 | } | |
1693 | ||
1694 | static char *sbp_get_fabric_name(void) | |
1695 | { | |
1696 | return "sbp"; | |
1697 | } | |
1698 | ||
1699 | static char *sbp_get_fabric_wwn(struct se_portal_group *se_tpg) | |
1700 | { | |
1701 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1702 | struct sbp_tport *tport = tpg->tport; | |
1703 | ||
1704 | return &tport->tport_name[0]; | |
1705 | } | |
1706 | ||
1707 | static u16 sbp_get_tag(struct se_portal_group *se_tpg) | |
1708 | { | |
1709 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1710 | return tpg->tport_tpgt; | |
1711 | } | |
1712 | ||
1713 | static u32 sbp_get_default_depth(struct se_portal_group *se_tpg) | |
1714 | { | |
1715 | return 1; | |
1716 | } | |
1717 | ||
1718 | static struct se_node_acl *sbp_alloc_fabric_acl(struct se_portal_group *se_tpg) | |
1719 | { | |
1720 | struct sbp_nacl *nacl; | |
1721 | ||
1722 | nacl = kzalloc(sizeof(struct sbp_nacl), GFP_KERNEL); | |
1723 | if (!nacl) { | |
1724 | pr_err("Unable to alocate struct sbp_nacl\n"); | |
1725 | return NULL; | |
1726 | } | |
1727 | ||
1728 | return &nacl->se_node_acl; | |
1729 | } | |
1730 | ||
1731 | static void sbp_release_fabric_acl( | |
1732 | struct se_portal_group *se_tpg, | |
1733 | struct se_node_acl *se_nacl) | |
1734 | { | |
1735 | struct sbp_nacl *nacl = | |
1736 | container_of(se_nacl, struct sbp_nacl, se_node_acl); | |
1737 | kfree(nacl); | |
1738 | } | |
1739 | ||
1740 | static u32 sbp_tpg_get_inst_index(struct se_portal_group *se_tpg) | |
1741 | { | |
1742 | return 1; | |
1743 | } | |
1744 | ||
1745 | static void sbp_release_cmd(struct se_cmd *se_cmd) | |
1746 | { | |
1747 | struct sbp_target_request *req = container_of(se_cmd, | |
1748 | struct sbp_target_request, se_cmd); | |
1749 | ||
1750 | sbp_free_request(req); | |
1751 | } | |
1752 | ||
1753 | static int sbp_shutdown_session(struct se_session *se_sess) | |
1754 | { | |
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | static void sbp_close_session(struct se_session *se_sess) | |
1759 | { | |
1760 | return; | |
1761 | } | |
1762 | ||
1763 | static u32 sbp_sess_get_index(struct se_session *se_sess) | |
1764 | { | |
1765 | return 0; | |
1766 | } | |
1767 | ||
1768 | static int sbp_write_pending(struct se_cmd *se_cmd) | |
1769 | { | |
1770 | struct sbp_target_request *req = container_of(se_cmd, | |
1771 | struct sbp_target_request, se_cmd); | |
1772 | int ret; | |
1773 | ||
1774 | ret = sbp_rw_data(req); | |
1775 | if (ret) { | |
1776 | req->status.status |= cpu_to_be32( | |
1777 | STATUS_BLOCK_RESP( | |
1778 | STATUS_RESP_TRANSPORT_FAILURE) | | |
1779 | STATUS_BLOCK_DEAD(0) | | |
1780 | STATUS_BLOCK_LEN(1) | | |
1781 | STATUS_BLOCK_SBP_STATUS( | |
1782 | SBP_STATUS_UNSPECIFIED_ERROR)); | |
1783 | sbp_send_status(req); | |
1784 | return ret; | |
1785 | } | |
1786 | ||
1787 | transport_generic_process_write(se_cmd); | |
1788 | ||
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | static int sbp_write_pending_status(struct se_cmd *se_cmd) | |
1793 | { | |
1794 | return 0; | |
1795 | } | |
1796 | ||
1797 | static void sbp_set_default_node_attrs(struct se_node_acl *nacl) | |
1798 | { | |
1799 | return; | |
1800 | } | |
1801 | ||
1802 | static u32 sbp_get_task_tag(struct se_cmd *se_cmd) | |
1803 | { | |
1804 | struct sbp_target_request *req = container_of(se_cmd, | |
1805 | struct sbp_target_request, se_cmd); | |
1806 | ||
1807 | /* only used for printk until we do TMRs */ | |
1808 | return (u32)req->orb_pointer; | |
1809 | } | |
1810 | ||
1811 | static int sbp_get_cmd_state(struct se_cmd *se_cmd) | |
1812 | { | |
1813 | return 0; | |
1814 | } | |
1815 | ||
1816 | static int sbp_queue_data_in(struct se_cmd *se_cmd) | |
1817 | { | |
1818 | struct sbp_target_request *req = container_of(se_cmd, | |
1819 | struct sbp_target_request, se_cmd); | |
1820 | int ret; | |
1821 | ||
1822 | ret = sbp_rw_data(req); | |
1823 | if (ret) { | |
1824 | req->status.status |= cpu_to_be32( | |
1825 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1826 | STATUS_BLOCK_DEAD(0) | | |
1827 | STATUS_BLOCK_LEN(1) | | |
1828 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1829 | sbp_send_status(req); | |
1830 | return ret; | |
1831 | } | |
1832 | ||
1833 | return sbp_send_sense(req); | |
1834 | } | |
1835 | ||
1836 | /* | |
1837 | * Called after command (no data transfer) or after the write (to device) | |
1838 | * operation is completed | |
1839 | */ | |
1840 | static int sbp_queue_status(struct se_cmd *se_cmd) | |
1841 | { | |
1842 | struct sbp_target_request *req = container_of(se_cmd, | |
1843 | struct sbp_target_request, se_cmd); | |
1844 | ||
1845 | return sbp_send_sense(req); | |
1846 | } | |
1847 | ||
1848 | static int sbp_queue_tm_rsp(struct se_cmd *se_cmd) | |
1849 | { | |
1850 | return 0; | |
1851 | } | |
1852 | ||
1853 | static u16 sbp_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length) | |
1854 | { | |
1855 | return 0; | |
1856 | } | |
1857 | ||
1858 | static u16 sbp_get_fabric_sense_len(void) | |
1859 | { | |
1860 | return 0; | |
1861 | } | |
1862 | ||
1863 | static int sbp_check_stop_free(struct se_cmd *se_cmd) | |
1864 | { | |
1865 | struct sbp_target_request *req = container_of(se_cmd, | |
1866 | struct sbp_target_request, se_cmd); | |
1867 | ||
1868 | transport_generic_free_cmd(&req->se_cmd, 0); | |
1869 | return 1; | |
1870 | } | |
1871 | ||
1872 | /* | |
1873 | * Handlers for Serial Bus Protocol 2/3 (SBP-2 / SBP-3) | |
1874 | */ | |
1875 | static u8 sbp_get_fabric_proto_ident(struct se_portal_group *se_tpg) | |
1876 | { | |
1877 | /* | |
1878 | * Return a IEEE 1394 SCSI Protocol identifier for loopback operations | |
1879 | * This is defined in section 7.5.1 Table 362 in spc4r17 | |
1880 | */ | |
1881 | return SCSI_PROTOCOL_SBP; | |
1882 | } | |
1883 | ||
1884 | static u32 sbp_get_pr_transport_id( | |
1885 | struct se_portal_group *se_tpg, | |
1886 | struct se_node_acl *se_nacl, | |
1887 | struct t10_pr_registration *pr_reg, | |
1888 | int *format_code, | |
1889 | unsigned char *buf) | |
1890 | { | |
1891 | int ret; | |
1892 | ||
1893 | /* | |
1894 | * Set PROTOCOL IDENTIFIER to 3h for SBP | |
1895 | */ | |
1896 | buf[0] = SCSI_PROTOCOL_SBP; | |
1897 | /* | |
1898 | * From spc4r17, 7.5.4.4 TransportID for initiator ports using SCSI | |
1899 | * over IEEE 1394 | |
1900 | */ | |
1901 | ret = hex2bin(&buf[8], se_nacl->initiatorname, 8); | |
1902 | if (ret < 0) | |
1903 | pr_debug("sbp transport_id: invalid hex string\n"); | |
1904 | ||
1905 | /* | |
1906 | * The IEEE 1394 Transport ID is a hardcoded 24-byte length | |
1907 | */ | |
1908 | return 24; | |
1909 | } | |
1910 | ||
1911 | static u32 sbp_get_pr_transport_id_len( | |
1912 | struct se_portal_group *se_tpg, | |
1913 | struct se_node_acl *se_nacl, | |
1914 | struct t10_pr_registration *pr_reg, | |
1915 | int *format_code) | |
1916 | { | |
1917 | *format_code = 0; | |
1918 | /* | |
1919 | * From spc4r17, 7.5.4.4 TransportID for initiator ports using SCSI | |
1920 | * over IEEE 1394 | |
1921 | * | |
1922 | * The SBP Transport ID is a hardcoded 24-byte length | |
1923 | */ | |
1924 | return 24; | |
1925 | } | |
1926 | ||
1927 | /* | |
1928 | * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above | |
1929 | * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. | |
1930 | */ | |
1931 | static char *sbp_parse_pr_out_transport_id( | |
1932 | struct se_portal_group *se_tpg, | |
1933 | const char *buf, | |
1934 | u32 *out_tid_len, | |
1935 | char **port_nexus_ptr) | |
1936 | { | |
1937 | /* | |
1938 | * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.4 TransportID | |
1939 | * for initiator ports using SCSI over SBP Serial SCSI Protocol | |
1940 | * | |
1941 | * The TransportID for a IEEE 1394 Initiator Port is of fixed size of | |
1942 | * 24 bytes, and IEEE 1394 does not contain a I_T nexus identifier, | |
1943 | * so we return the **port_nexus_ptr set to NULL. | |
1944 | */ | |
1945 | *port_nexus_ptr = NULL; | |
1946 | *out_tid_len = 24; | |
1947 | ||
1948 | return (char *)&buf[8]; | |
1949 | } | |
1950 | ||
1951 | static int sbp_count_se_tpg_luns(struct se_portal_group *tpg) | |
1952 | { | |
1953 | int i, count = 0; | |
1954 | ||
1955 | spin_lock(&tpg->tpg_lun_lock); | |
1956 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
1957 | struct se_lun *se_lun = tpg->tpg_lun_list[i]; | |
1958 | ||
1959 | if (se_lun->lun_status == TRANSPORT_LUN_STATUS_FREE) | |
1960 | continue; | |
1961 | ||
1962 | count++; | |
1963 | } | |
1964 | spin_unlock(&tpg->tpg_lun_lock); | |
1965 | ||
1966 | return count; | |
1967 | } | |
1968 | ||
1969 | static int sbp_update_unit_directory(struct sbp_tport *tport) | |
1970 | { | |
1971 | int num_luns, num_entries, idx = 0, mgt_agt_addr, ret, i; | |
1972 | u32 *data; | |
1973 | ||
1974 | if (tport->unit_directory.data) { | |
1975 | fw_core_remove_descriptor(&tport->unit_directory); | |
1976 | kfree(tport->unit_directory.data); | |
1977 | tport->unit_directory.data = NULL; | |
1978 | } | |
1979 | ||
1980 | if (!tport->enable || !tport->tpg) | |
1981 | return 0; | |
1982 | ||
1983 | num_luns = sbp_count_se_tpg_luns(&tport->tpg->se_tpg); | |
1984 | ||
1985 | /* | |
1986 | * Number of entries in the final unit directory: | |
1987 | * - all of those in the template | |
1988 | * - management_agent | |
1989 | * - unit_characteristics | |
1990 | * - reconnect_timeout | |
1991 | * - unit unique ID | |
1992 | * - one for each LUN | |
1993 | * | |
1994 | * MUST NOT include leaf or sub-directory entries | |
1995 | */ | |
1996 | num_entries = ARRAY_SIZE(sbp_unit_directory_template) + 4 + num_luns; | |
1997 | ||
1998 | if (tport->directory_id != -1) | |
1999 | num_entries++; | |
2000 | ||
2001 | /* allocate num_entries + 4 for the header and unique ID leaf */ | |
2002 | data = kcalloc((num_entries + 4), sizeof(u32), GFP_KERNEL); | |
2003 | if (!data) | |
2004 | return -ENOMEM; | |
2005 | ||
2006 | /* directory_length */ | |
2007 | data[idx++] = num_entries << 16; | |
2008 | ||
2009 | /* directory_id */ | |
2010 | if (tport->directory_id != -1) | |
2011 | data[idx++] = (CSR_DIRECTORY_ID << 24) | tport->directory_id; | |
2012 | ||
2013 | /* unit directory template */ | |
2014 | memcpy(&data[idx], sbp_unit_directory_template, | |
2015 | sizeof(sbp_unit_directory_template)); | |
2016 | idx += ARRAY_SIZE(sbp_unit_directory_template); | |
2017 | ||
2018 | /* management_agent */ | |
2019 | mgt_agt_addr = (tport->mgt_agt->handler.offset - CSR_REGISTER_BASE) / 4; | |
2020 | data[idx++] = 0x54000000 | (mgt_agt_addr & 0x00ffffff); | |
2021 | ||
2022 | /* unit_characteristics */ | |
2023 | data[idx++] = 0x3a000000 | | |
2024 | (((tport->mgt_orb_timeout * 2) << 8) & 0xff00) | | |
2025 | SBP_ORB_FETCH_SIZE; | |
2026 | ||
2027 | /* reconnect_timeout */ | |
2028 | data[idx++] = 0x3d000000 | (tport->max_reconnect_timeout & 0xffff); | |
2029 | ||
2030 | /* unit unique ID (leaf is just after LUNs) */ | |
2031 | data[idx++] = 0x8d000000 | (num_luns + 1); | |
2032 | ||
2033 | spin_lock(&tport->tpg->se_tpg.tpg_lun_lock); | |
2034 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
2035 | struct se_lun *se_lun = tport->tpg->se_tpg.tpg_lun_list[i]; | |
2036 | struct se_device *dev; | |
2037 | int type; | |
2038 | ||
2039 | if (se_lun->lun_status == TRANSPORT_LUN_STATUS_FREE) | |
2040 | continue; | |
2041 | ||
2042 | spin_unlock(&tport->tpg->se_tpg.tpg_lun_lock); | |
2043 | ||
2044 | dev = se_lun->lun_se_dev; | |
2045 | type = dev->transport->get_device_type(dev); | |
2046 | ||
2047 | /* logical_unit_number */ | |
2048 | data[idx++] = 0x14000000 | | |
2049 | ((type << 16) & 0x1f0000) | | |
2050 | (se_lun->unpacked_lun & 0xffff); | |
2051 | ||
2052 | spin_lock(&tport->tpg->se_tpg.tpg_lun_lock); | |
2053 | } | |
2054 | spin_unlock(&tport->tpg->se_tpg.tpg_lun_lock); | |
2055 | ||
2056 | /* unit unique ID leaf */ | |
2057 | data[idx++] = 2 << 16; | |
2058 | data[idx++] = tport->guid >> 32; | |
2059 | data[idx++] = tport->guid; | |
2060 | ||
2061 | tport->unit_directory.length = idx; | |
2062 | tport->unit_directory.key = (CSR_DIRECTORY | CSR_UNIT) << 24; | |
2063 | tport->unit_directory.data = data; | |
2064 | ||
2065 | ret = fw_core_add_descriptor(&tport->unit_directory); | |
2066 | if (ret < 0) { | |
2067 | kfree(tport->unit_directory.data); | |
2068 | tport->unit_directory.data = NULL; | |
2069 | } | |
2070 | ||
2071 | return ret; | |
2072 | } | |
2073 | ||
2074 | static ssize_t sbp_parse_wwn(const char *name, u64 *wwn, int strict) | |
2075 | { | |
2076 | const char *cp; | |
2077 | char c, nibble; | |
2078 | int pos = 0, err; | |
2079 | ||
2080 | *wwn = 0; | |
2081 | for (cp = name; cp < &name[SBP_NAMELEN - 1]; cp++) { | |
2082 | c = *cp; | |
2083 | if (c == '\n' && cp[1] == '\0') | |
2084 | continue; | |
2085 | if (c == '\0') { | |
2086 | err = 2; | |
2087 | if (pos != 16) | |
2088 | goto fail; | |
2089 | return cp - name; | |
2090 | } | |
2091 | err = 3; | |
2092 | if (isdigit(c)) | |
2093 | nibble = c - '0'; | |
2094 | else if (isxdigit(c) && (islower(c) || !strict)) | |
2095 | nibble = tolower(c) - 'a' + 10; | |
2096 | else | |
2097 | goto fail; | |
2098 | *wwn = (*wwn << 4) | nibble; | |
2099 | pos++; | |
2100 | } | |
2101 | err = 4; | |
2102 | fail: | |
2103 | printk(KERN_INFO "err %u len %zu pos %u\n", | |
2104 | err, cp - name, pos); | |
2105 | return -1; | |
2106 | } | |
2107 | ||
2108 | static ssize_t sbp_format_wwn(char *buf, size_t len, u64 wwn) | |
2109 | { | |
2110 | return snprintf(buf, len, "%016llx", wwn); | |
2111 | } | |
2112 | ||
2113 | static struct se_node_acl *sbp_make_nodeacl( | |
2114 | struct se_portal_group *se_tpg, | |
2115 | struct config_group *group, | |
2116 | const char *name) | |
2117 | { | |
2118 | struct se_node_acl *se_nacl, *se_nacl_new; | |
2119 | struct sbp_nacl *nacl; | |
2120 | u64 guid = 0; | |
2121 | u32 nexus_depth = 1; | |
2122 | ||
2123 | if (sbp_parse_wwn(name, &guid, 1) < 0) | |
2124 | return ERR_PTR(-EINVAL); | |
2125 | ||
2126 | se_nacl_new = sbp_alloc_fabric_acl(se_tpg); | |
2127 | if (!se_nacl_new) | |
2128 | return ERR_PTR(-ENOMEM); | |
2129 | ||
2130 | /* | |
2131 | * se_nacl_new may be released by core_tpg_add_initiator_node_acl() | |
2132 | * when converting a NodeACL from demo mode -> explict | |
2133 | */ | |
2134 | se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new, | |
2135 | name, nexus_depth); | |
2136 | if (IS_ERR(se_nacl)) { | |
2137 | sbp_release_fabric_acl(se_tpg, se_nacl_new); | |
2138 | return se_nacl; | |
2139 | } | |
2140 | ||
2141 | nacl = container_of(se_nacl, struct sbp_nacl, se_node_acl); | |
2142 | nacl->guid = guid; | |
2143 | sbp_format_wwn(nacl->iport_name, SBP_NAMELEN, guid); | |
2144 | ||
2145 | return se_nacl; | |
2146 | } | |
2147 | ||
2148 | static void sbp_drop_nodeacl(struct se_node_acl *se_acl) | |
2149 | { | |
2150 | struct sbp_nacl *nacl = | |
2151 | container_of(se_acl, struct sbp_nacl, se_node_acl); | |
2152 | ||
2153 | core_tpg_del_initiator_node_acl(se_acl->se_tpg, se_acl, 1); | |
2154 | kfree(nacl); | |
2155 | } | |
2156 | ||
2157 | static int sbp_post_link_lun( | |
2158 | struct se_portal_group *se_tpg, | |
2159 | struct se_lun *se_lun) | |
2160 | { | |
2161 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2162 | ||
2163 | return sbp_update_unit_directory(tpg->tport); | |
2164 | } | |
2165 | ||
2166 | static void sbp_pre_unlink_lun( | |
2167 | struct se_portal_group *se_tpg, | |
2168 | struct se_lun *se_lun) | |
2169 | { | |
2170 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2171 | struct sbp_tport *tport = tpg->tport; | |
2172 | int ret; | |
2173 | ||
2174 | if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) | |
2175 | tport->enable = 0; | |
2176 | ||
2177 | ret = sbp_update_unit_directory(tport); | |
2178 | if (ret < 0) | |
2179 | pr_err("unlink LUN: failed to update unit directory\n"); | |
2180 | } | |
2181 | ||
2182 | static struct se_portal_group *sbp_make_tpg( | |
2183 | struct se_wwn *wwn, | |
2184 | struct config_group *group, | |
2185 | const char *name) | |
2186 | { | |
2187 | struct sbp_tport *tport = | |
2188 | container_of(wwn, struct sbp_tport, tport_wwn); | |
2189 | ||
2190 | struct sbp_tpg *tpg; | |
2191 | unsigned long tpgt; | |
2192 | int ret; | |
2193 | ||
2194 | if (strstr(name, "tpgt_") != name) | |
2195 | return ERR_PTR(-EINVAL); | |
2196 | if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX) | |
2197 | return ERR_PTR(-EINVAL); | |
2198 | ||
2199 | if (tport->tpg) { | |
2200 | pr_err("Only one TPG per Unit is possible.\n"); | |
2201 | return ERR_PTR(-EBUSY); | |
2202 | } | |
2203 | ||
2204 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); | |
2205 | if (!tpg) { | |
2206 | pr_err("Unable to allocate struct sbp_tpg\n"); | |
2207 | return ERR_PTR(-ENOMEM); | |
2208 | } | |
2209 | ||
2210 | tpg->tport = tport; | |
2211 | tpg->tport_tpgt = tpgt; | |
2212 | tport->tpg = tpg; | |
2213 | ||
2214 | /* default attribute values */ | |
2215 | tport->enable = 0; | |
2216 | tport->directory_id = -1; | |
2217 | tport->mgt_orb_timeout = 15; | |
2218 | tport->max_reconnect_timeout = 5; | |
2219 | tport->max_logins_per_lun = 1; | |
2220 | ||
2221 | tport->mgt_agt = sbp_management_agent_register(tport); | |
2222 | if (IS_ERR(tport->mgt_agt)) { | |
2223 | ret = PTR_ERR(tport->mgt_agt); | |
2224 | kfree(tpg); | |
2225 | return ERR_PTR(ret); | |
2226 | } | |
2227 | ||
2228 | ret = core_tpg_register(&sbp_fabric_configfs->tf_ops, wwn, | |
2229 | &tpg->se_tpg, (void *)tpg, | |
2230 | TRANSPORT_TPG_TYPE_NORMAL); | |
2231 | if (ret < 0) { | |
2232 | sbp_management_agent_unregister(tport->mgt_agt); | |
2233 | kfree(tpg); | |
2234 | return ERR_PTR(ret); | |
2235 | } | |
2236 | ||
2237 | return &tpg->se_tpg; | |
2238 | } | |
2239 | ||
2240 | static void sbp_drop_tpg(struct se_portal_group *se_tpg) | |
2241 | { | |
2242 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2243 | struct sbp_tport *tport = tpg->tport; | |
2244 | ||
2245 | core_tpg_deregister(se_tpg); | |
2246 | sbp_management_agent_unregister(tport->mgt_agt); | |
2247 | tport->tpg = NULL; | |
2248 | kfree(tpg); | |
2249 | } | |
2250 | ||
2251 | static struct se_wwn *sbp_make_tport( | |
2252 | struct target_fabric_configfs *tf, | |
2253 | struct config_group *group, | |
2254 | const char *name) | |
2255 | { | |
2256 | struct sbp_tport *tport; | |
2257 | u64 guid = 0; | |
2258 | ||
2259 | if (sbp_parse_wwn(name, &guid, 1) < 0) | |
2260 | return ERR_PTR(-EINVAL); | |
2261 | ||
2262 | tport = kzalloc(sizeof(*tport), GFP_KERNEL); | |
2263 | if (!tport) { | |
2264 | pr_err("Unable to allocate struct sbp_tport\n"); | |
2265 | return ERR_PTR(-ENOMEM); | |
2266 | } | |
2267 | ||
2268 | tport->guid = guid; | |
2269 | sbp_format_wwn(tport->tport_name, SBP_NAMELEN, guid); | |
2270 | ||
2271 | return &tport->tport_wwn; | |
2272 | } | |
2273 | ||
2274 | static void sbp_drop_tport(struct se_wwn *wwn) | |
2275 | { | |
2276 | struct sbp_tport *tport = | |
2277 | container_of(wwn, struct sbp_tport, tport_wwn); | |
2278 | ||
2279 | kfree(tport); | |
2280 | } | |
2281 | ||
2282 | static ssize_t sbp_wwn_show_attr_version( | |
2283 | struct target_fabric_configfs *tf, | |
2284 | char *page) | |
2285 | { | |
2286 | return sprintf(page, "FireWire SBP fabric module %s\n", SBP_VERSION); | |
2287 | } | |
2288 | ||
2289 | TF_WWN_ATTR_RO(sbp, version); | |
2290 | ||
2291 | static struct configfs_attribute *sbp_wwn_attrs[] = { | |
2292 | &sbp_wwn_version.attr, | |
2293 | NULL, | |
2294 | }; | |
2295 | ||
2296 | static ssize_t sbp_tpg_show_directory_id( | |
2297 | struct se_portal_group *se_tpg, | |
2298 | char *page) | |
2299 | { | |
2300 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2301 | struct sbp_tport *tport = tpg->tport; | |
2302 | ||
2303 | if (tport->directory_id == -1) | |
2304 | return sprintf(page, "implicit\n"); | |
2305 | else | |
2306 | return sprintf(page, "%06x\n", tport->directory_id); | |
2307 | } | |
2308 | ||
2309 | static ssize_t sbp_tpg_store_directory_id( | |
2310 | struct se_portal_group *se_tpg, | |
2311 | const char *page, | |
2312 | size_t count) | |
2313 | { | |
2314 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2315 | struct sbp_tport *tport = tpg->tport; | |
2316 | unsigned long val; | |
2317 | ||
2318 | if (tport->enable) { | |
2319 | pr_err("Cannot change the directory_id on an active target.\n"); | |
2320 | return -EBUSY; | |
2321 | } | |
2322 | ||
2323 | if (strstr(page, "implicit") == page) { | |
2324 | tport->directory_id = -1; | |
2325 | } else { | |
2326 | if (kstrtoul(page, 16, &val) < 0) | |
2327 | return -EINVAL; | |
2328 | if (val > 0xffffff) | |
2329 | return -EINVAL; | |
2330 | ||
2331 | tport->directory_id = val; | |
2332 | } | |
2333 | ||
2334 | return count; | |
2335 | } | |
2336 | ||
2337 | static ssize_t sbp_tpg_show_enable( | |
2338 | struct se_portal_group *se_tpg, | |
2339 | char *page) | |
2340 | { | |
2341 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2342 | struct sbp_tport *tport = tpg->tport; | |
2343 | return sprintf(page, "%d\n", tport->enable); | |
2344 | } | |
2345 | ||
2346 | static ssize_t sbp_tpg_store_enable( | |
2347 | struct se_portal_group *se_tpg, | |
2348 | const char *page, | |
2349 | size_t count) | |
2350 | { | |
2351 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2352 | struct sbp_tport *tport = tpg->tport; | |
2353 | unsigned long val; | |
2354 | int ret; | |
2355 | ||
2356 | if (kstrtoul(page, 0, &val) < 0) | |
2357 | return -EINVAL; | |
2358 | if ((val != 0) && (val != 1)) | |
2359 | return -EINVAL; | |
2360 | ||
2361 | if (tport->enable == val) | |
2362 | return count; | |
2363 | ||
2364 | if (val) { | |
2365 | if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) { | |
2366 | pr_err("Cannot enable a target with no LUNs!\n"); | |
2367 | return -EINVAL; | |
2368 | } | |
2369 | } else { | |
2370 | /* XXX: force-shutdown sessions instead? */ | |
2371 | spin_lock_bh(&se_tpg->session_lock); | |
2372 | if (!list_empty(&se_tpg->tpg_sess_list)) { | |
2373 | spin_unlock_bh(&se_tpg->session_lock); | |
2374 | return -EBUSY; | |
2375 | } | |
2376 | spin_unlock_bh(&se_tpg->session_lock); | |
2377 | } | |
2378 | ||
2379 | tport->enable = val; | |
2380 | ||
2381 | ret = sbp_update_unit_directory(tport); | |
2382 | if (ret < 0) { | |
2383 | pr_err("Could not update Config ROM\n"); | |
2384 | return ret; | |
2385 | } | |
2386 | ||
2387 | return count; | |
2388 | } | |
2389 | ||
2390 | TF_TPG_BASE_ATTR(sbp, directory_id, S_IRUGO | S_IWUSR); | |
2391 | TF_TPG_BASE_ATTR(sbp, enable, S_IRUGO | S_IWUSR); | |
2392 | ||
2393 | static struct configfs_attribute *sbp_tpg_base_attrs[] = { | |
2394 | &sbp_tpg_directory_id.attr, | |
2395 | &sbp_tpg_enable.attr, | |
2396 | NULL, | |
2397 | }; | |
2398 | ||
2399 | static ssize_t sbp_tpg_attrib_show_mgt_orb_timeout( | |
2400 | struct se_portal_group *se_tpg, | |
2401 | char *page) | |
2402 | { | |
2403 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2404 | struct sbp_tport *tport = tpg->tport; | |
2405 | return sprintf(page, "%d\n", tport->mgt_orb_timeout); | |
2406 | } | |
2407 | ||
2408 | static ssize_t sbp_tpg_attrib_store_mgt_orb_timeout( | |
2409 | struct se_portal_group *se_tpg, | |
2410 | const char *page, | |
2411 | size_t count) | |
2412 | { | |
2413 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2414 | struct sbp_tport *tport = tpg->tport; | |
2415 | unsigned long val; | |
2416 | int ret; | |
2417 | ||
2418 | if (kstrtoul(page, 0, &val) < 0) | |
2419 | return -EINVAL; | |
2420 | if ((val < 1) || (val > 127)) | |
2421 | return -EINVAL; | |
2422 | ||
2423 | if (tport->mgt_orb_timeout == val) | |
2424 | return count; | |
2425 | ||
2426 | tport->mgt_orb_timeout = val; | |
2427 | ||
2428 | ret = sbp_update_unit_directory(tport); | |
2429 | if (ret < 0) | |
2430 | return ret; | |
2431 | ||
2432 | return count; | |
2433 | } | |
2434 | ||
2435 | static ssize_t sbp_tpg_attrib_show_max_reconnect_timeout( | |
2436 | struct se_portal_group *se_tpg, | |
2437 | char *page) | |
2438 | { | |
2439 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2440 | struct sbp_tport *tport = tpg->tport; | |
2441 | return sprintf(page, "%d\n", tport->max_reconnect_timeout); | |
2442 | } | |
2443 | ||
2444 | static ssize_t sbp_tpg_attrib_store_max_reconnect_timeout( | |
2445 | struct se_portal_group *se_tpg, | |
2446 | const char *page, | |
2447 | size_t count) | |
2448 | { | |
2449 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2450 | struct sbp_tport *tport = tpg->tport; | |
2451 | unsigned long val; | |
2452 | int ret; | |
2453 | ||
2454 | if (kstrtoul(page, 0, &val) < 0) | |
2455 | return -EINVAL; | |
2456 | if ((val < 1) || (val > 32767)) | |
2457 | return -EINVAL; | |
2458 | ||
2459 | if (tport->max_reconnect_timeout == val) | |
2460 | return count; | |
2461 | ||
2462 | tport->max_reconnect_timeout = val; | |
2463 | ||
2464 | ret = sbp_update_unit_directory(tport); | |
2465 | if (ret < 0) | |
2466 | return ret; | |
2467 | ||
2468 | return count; | |
2469 | } | |
2470 | ||
2471 | static ssize_t sbp_tpg_attrib_show_max_logins_per_lun( | |
2472 | struct se_portal_group *se_tpg, | |
2473 | char *page) | |
2474 | { | |
2475 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2476 | struct sbp_tport *tport = tpg->tport; | |
2477 | return sprintf(page, "%d\n", tport->max_logins_per_lun); | |
2478 | } | |
2479 | ||
2480 | static ssize_t sbp_tpg_attrib_store_max_logins_per_lun( | |
2481 | struct se_portal_group *se_tpg, | |
2482 | const char *page, | |
2483 | size_t count) | |
2484 | { | |
2485 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2486 | struct sbp_tport *tport = tpg->tport; | |
2487 | unsigned long val; | |
2488 | ||
2489 | if (kstrtoul(page, 0, &val) < 0) | |
2490 | return -EINVAL; | |
2491 | if ((val < 1) || (val > 127)) | |
2492 | return -EINVAL; | |
2493 | ||
2494 | /* XXX: also check against current count? */ | |
2495 | ||
2496 | tport->max_logins_per_lun = val; | |
2497 | ||
2498 | return count; | |
2499 | } | |
2500 | ||
2501 | TF_TPG_ATTRIB_ATTR(sbp, mgt_orb_timeout, S_IRUGO | S_IWUSR); | |
2502 | TF_TPG_ATTRIB_ATTR(sbp, max_reconnect_timeout, S_IRUGO | S_IWUSR); | |
2503 | TF_TPG_ATTRIB_ATTR(sbp, max_logins_per_lun, S_IRUGO | S_IWUSR); | |
2504 | ||
2505 | static struct configfs_attribute *sbp_tpg_attrib_attrs[] = { | |
2506 | &sbp_tpg_attrib_mgt_orb_timeout.attr, | |
2507 | &sbp_tpg_attrib_max_reconnect_timeout.attr, | |
2508 | &sbp_tpg_attrib_max_logins_per_lun.attr, | |
2509 | NULL, | |
2510 | }; | |
2511 | ||
2512 | static struct target_core_fabric_ops sbp_ops = { | |
2513 | .get_fabric_name = sbp_get_fabric_name, | |
2514 | .get_fabric_proto_ident = sbp_get_fabric_proto_ident, | |
2515 | .tpg_get_wwn = sbp_get_fabric_wwn, | |
2516 | .tpg_get_tag = sbp_get_tag, | |
2517 | .tpg_get_default_depth = sbp_get_default_depth, | |
2518 | .tpg_get_pr_transport_id = sbp_get_pr_transport_id, | |
2519 | .tpg_get_pr_transport_id_len = sbp_get_pr_transport_id_len, | |
2520 | .tpg_parse_pr_out_transport_id = sbp_parse_pr_out_transport_id, | |
2521 | .tpg_check_demo_mode = sbp_check_true, | |
2522 | .tpg_check_demo_mode_cache = sbp_check_true, | |
2523 | .tpg_check_demo_mode_write_protect = sbp_check_false, | |
2524 | .tpg_check_prod_mode_write_protect = sbp_check_false, | |
2525 | .tpg_alloc_fabric_acl = sbp_alloc_fabric_acl, | |
2526 | .tpg_release_fabric_acl = sbp_release_fabric_acl, | |
2527 | .tpg_get_inst_index = sbp_tpg_get_inst_index, | |
2528 | .release_cmd = sbp_release_cmd, | |
2529 | .shutdown_session = sbp_shutdown_session, | |
2530 | .close_session = sbp_close_session, | |
2531 | .sess_get_index = sbp_sess_get_index, | |
2532 | .write_pending = sbp_write_pending, | |
2533 | .write_pending_status = sbp_write_pending_status, | |
2534 | .set_default_node_attributes = sbp_set_default_node_attrs, | |
2535 | .get_task_tag = sbp_get_task_tag, | |
2536 | .get_cmd_state = sbp_get_cmd_state, | |
2537 | .queue_data_in = sbp_queue_data_in, | |
2538 | .queue_status = sbp_queue_status, | |
2539 | .queue_tm_rsp = sbp_queue_tm_rsp, | |
2540 | .get_fabric_sense_len = sbp_get_fabric_sense_len, | |
2541 | .set_fabric_sense_len = sbp_set_fabric_sense_len, | |
2542 | .check_stop_free = sbp_check_stop_free, | |
2543 | ||
2544 | .fabric_make_wwn = sbp_make_tport, | |
2545 | .fabric_drop_wwn = sbp_drop_tport, | |
2546 | .fabric_make_tpg = sbp_make_tpg, | |
2547 | .fabric_drop_tpg = sbp_drop_tpg, | |
2548 | .fabric_post_link = sbp_post_link_lun, | |
2549 | .fabric_pre_unlink = sbp_pre_unlink_lun, | |
2550 | .fabric_make_np = NULL, | |
2551 | .fabric_drop_np = NULL, | |
2552 | .fabric_make_nodeacl = sbp_make_nodeacl, | |
2553 | .fabric_drop_nodeacl = sbp_drop_nodeacl, | |
2554 | }; | |
2555 | ||
2556 | static int sbp_register_configfs(void) | |
2557 | { | |
2558 | struct target_fabric_configfs *fabric; | |
2559 | int ret; | |
2560 | ||
2561 | fabric = target_fabric_configfs_init(THIS_MODULE, "sbp"); | |
2562 | if (!fabric) { | |
2563 | pr_err("target_fabric_configfs_init() failed\n"); | |
2564 | return -ENOMEM; | |
2565 | } | |
2566 | ||
2567 | fabric->tf_ops = sbp_ops; | |
2568 | ||
2569 | /* | |
2570 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
2571 | */ | |
2572 | TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = sbp_wwn_attrs; | |
2573 | TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = sbp_tpg_base_attrs; | |
2574 | TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = sbp_tpg_attrib_attrs; | |
2575 | TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; | |
2576 | TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; | |
2577 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL; | |
2578 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL; | |
2579 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL; | |
2580 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL; | |
2581 | ||
2582 | ret = target_fabric_configfs_register(fabric); | |
2583 | if (ret < 0) { | |
2584 | pr_err("target_fabric_configfs_register() failed for SBP\n"); | |
2585 | return ret; | |
2586 | } | |
2587 | ||
2588 | sbp_fabric_configfs = fabric; | |
2589 | ||
2590 | return 0; | |
2591 | }; | |
2592 | ||
2593 | static void sbp_deregister_configfs(void) | |
2594 | { | |
2595 | if (!sbp_fabric_configfs) | |
2596 | return; | |
2597 | ||
2598 | target_fabric_configfs_deregister(sbp_fabric_configfs); | |
2599 | sbp_fabric_configfs = NULL; | |
2600 | }; | |
2601 | ||
2602 | static int __init sbp_init(void) | |
2603 | { | |
2604 | int ret; | |
2605 | ||
2606 | ret = sbp_register_configfs(); | |
2607 | if (ret < 0) | |
2608 | return ret; | |
2609 | ||
2610 | return 0; | |
2611 | }; | |
2612 | ||
2613 | static void sbp_exit(void) | |
2614 | { | |
2615 | sbp_deregister_configfs(); | |
2616 | }; | |
2617 | ||
2618 | MODULE_DESCRIPTION("FireWire SBP fabric driver"); | |
2619 | MODULE_LICENSE("GPL"); | |
2620 | module_init(sbp_init); | |
2621 | module_exit(sbp_exit); |