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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> | |
ba929992 | 33 | #include <scsi/scsi_proto.h> |
a511ce33 CB |
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 | ||
9ac8928e | 45 | static const struct target_core_fabric_ops sbp_ops; |
a511ce33 CB |
46 | |
47 | /* FireWire address region for management and command block address handlers */ | |
48 | static const struct fw_address_region sbp_register_region = { | |
49 | .start = CSR_REGISTER_BASE + 0x10000, | |
50 | .end = 0x1000000000000ULL, | |
51 | }; | |
52 | ||
53 | static const u32 sbp_unit_directory_template[] = { | |
54 | 0x1200609e, /* unit_specifier_id: NCITS/T10 */ | |
55 | 0x13010483, /* unit_sw_version: 1155D Rev 4 */ | |
56 | 0x3800609e, /* command_set_specifier_id: NCITS/T10 */ | |
57 | 0x390104d8, /* command_set: SPC-2 */ | |
58 | 0x3b000000, /* command_set_revision: 0 */ | |
59 | 0x3c000001, /* firmware_revision: 1 */ | |
60 | }; | |
61 | ||
62 | #define SESSION_MAINTENANCE_INTERVAL HZ | |
63 | ||
64 | static atomic_t login_id = ATOMIC_INIT(0); | |
65 | ||
66 | static void session_maintenance_work(struct work_struct *); | |
67 | static int sbp_run_transaction(struct fw_card *, int, int, int, int, | |
68 | unsigned long long, void *, size_t); | |
69 | ||
70 | static int read_peer_guid(u64 *guid, const struct sbp_management_request *req) | |
71 | { | |
72 | int ret; | |
73 | __be32 high, low; | |
74 | ||
75 | ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST, | |
76 | req->node_addr, req->generation, req->speed, | |
77 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 3 * 4, | |
78 | &high, sizeof(high)); | |
79 | if (ret != RCODE_COMPLETE) | |
80 | return ret; | |
81 | ||
82 | ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST, | |
83 | req->node_addr, req->generation, req->speed, | |
84 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 4 * 4, | |
85 | &low, sizeof(low)); | |
86 | if (ret != RCODE_COMPLETE) | |
87 | return ret; | |
88 | ||
89 | *guid = (u64)be32_to_cpu(high) << 32 | be32_to_cpu(low); | |
90 | ||
91 | return RCODE_COMPLETE; | |
92 | } | |
93 | ||
94 | static struct sbp_session *sbp_session_find_by_guid( | |
95 | struct sbp_tpg *tpg, u64 guid) | |
96 | { | |
97 | struct se_session *se_sess; | |
98 | struct sbp_session *sess, *found = NULL; | |
99 | ||
100 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
101 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
102 | sess = se_sess->fabric_sess_ptr; | |
103 | if (sess->guid == guid) | |
104 | found = sess; | |
105 | } | |
106 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
107 | ||
108 | return found; | |
109 | } | |
110 | ||
111 | static struct sbp_login_descriptor *sbp_login_find_by_lun( | |
112 | struct sbp_session *session, struct se_lun *lun) | |
113 | { | |
114 | struct sbp_login_descriptor *login, *found = NULL; | |
115 | ||
116 | spin_lock_bh(&session->lock); | |
117 | list_for_each_entry(login, &session->login_list, link) { | |
118 | if (login->lun == lun) | |
119 | found = login; | |
120 | } | |
121 | spin_unlock_bh(&session->lock); | |
122 | ||
123 | return found; | |
124 | } | |
125 | ||
126 | static int sbp_login_count_all_by_lun( | |
127 | struct sbp_tpg *tpg, | |
128 | struct se_lun *lun, | |
129 | int exclusive) | |
130 | { | |
131 | struct se_session *se_sess; | |
132 | struct sbp_session *sess; | |
133 | struct sbp_login_descriptor *login; | |
134 | int count = 0; | |
135 | ||
136 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
137 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
138 | sess = se_sess->fabric_sess_ptr; | |
139 | ||
140 | spin_lock_bh(&sess->lock); | |
141 | list_for_each_entry(login, &sess->login_list, link) { | |
142 | if (login->lun != lun) | |
143 | continue; | |
144 | ||
145 | if (!exclusive || login->exclusive) | |
146 | count++; | |
147 | } | |
148 | spin_unlock_bh(&sess->lock); | |
149 | } | |
150 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
151 | ||
152 | return count; | |
153 | } | |
154 | ||
155 | static struct sbp_login_descriptor *sbp_login_find_by_id( | |
156 | struct sbp_tpg *tpg, int login_id) | |
157 | { | |
158 | struct se_session *se_sess; | |
159 | struct sbp_session *sess; | |
160 | struct sbp_login_descriptor *login, *found = NULL; | |
161 | ||
162 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
163 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
164 | sess = se_sess->fabric_sess_ptr; | |
165 | ||
166 | spin_lock_bh(&sess->lock); | |
167 | list_for_each_entry(login, &sess->login_list, link) { | |
168 | if (login->login_id == login_id) | |
169 | found = login; | |
170 | } | |
171 | spin_unlock_bh(&sess->lock); | |
172 | } | |
173 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
174 | ||
175 | return found; | |
176 | } | |
177 | ||
178 | static struct se_lun *sbp_get_lun_from_tpg(struct sbp_tpg *tpg, int lun) | |
179 | { | |
180 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
181 | struct se_lun *se_lun; | |
182 | ||
183 | if (lun >= TRANSPORT_MAX_LUNS_PER_TPG) | |
184 | return ERR_PTR(-EINVAL); | |
185 | ||
186 | spin_lock(&se_tpg->tpg_lun_lock); | |
187 | se_lun = se_tpg->tpg_lun_list[lun]; | |
188 | ||
189 | if (se_lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) | |
190 | se_lun = ERR_PTR(-ENODEV); | |
191 | ||
192 | spin_unlock(&se_tpg->tpg_lun_lock); | |
193 | ||
194 | return se_lun; | |
195 | } | |
196 | ||
197 | static struct sbp_session *sbp_session_create( | |
198 | struct sbp_tpg *tpg, | |
199 | u64 guid) | |
200 | { | |
201 | struct sbp_session *sess; | |
202 | int ret; | |
203 | char guid_str[17]; | |
204 | struct se_node_acl *se_nacl; | |
205 | ||
206 | sess = kmalloc(sizeof(*sess), GFP_KERNEL); | |
207 | if (!sess) { | |
208 | pr_err("failed to allocate session descriptor\n"); | |
209 | return ERR_PTR(-ENOMEM); | |
210 | } | |
211 | ||
e70beee7 | 212 | sess->se_sess = transport_init_session(TARGET_PROT_NORMAL); |
a511ce33 CB |
213 | if (IS_ERR(sess->se_sess)) { |
214 | pr_err("failed to init se_session\n"); | |
215 | ||
216 | ret = PTR_ERR(sess->se_sess); | |
217 | kfree(sess); | |
218 | return ERR_PTR(ret); | |
219 | } | |
220 | ||
221 | snprintf(guid_str, sizeof(guid_str), "%016llx", guid); | |
222 | ||
223 | se_nacl = core_tpg_check_initiator_node_acl(&tpg->se_tpg, guid_str); | |
224 | if (!se_nacl) { | |
225 | pr_warn("Node ACL not found for %s\n", guid_str); | |
226 | ||
227 | transport_free_session(sess->se_sess); | |
228 | kfree(sess); | |
229 | ||
230 | return ERR_PTR(-EPERM); | |
231 | } | |
232 | ||
233 | sess->se_sess->se_node_acl = se_nacl; | |
234 | ||
235 | spin_lock_init(&sess->lock); | |
236 | INIT_LIST_HEAD(&sess->login_list); | |
237 | INIT_DELAYED_WORK(&sess->maint_work, session_maintenance_work); | |
238 | ||
239 | sess->guid = guid; | |
240 | ||
241 | transport_register_session(&tpg->se_tpg, se_nacl, sess->se_sess, sess); | |
242 | ||
243 | return sess; | |
244 | } | |
245 | ||
246 | static void sbp_session_release(struct sbp_session *sess, bool cancel_work) | |
247 | { | |
248 | spin_lock_bh(&sess->lock); | |
249 | if (!list_empty(&sess->login_list)) { | |
250 | spin_unlock_bh(&sess->lock); | |
251 | return; | |
252 | } | |
253 | spin_unlock_bh(&sess->lock); | |
254 | ||
255 | if (cancel_work) | |
256 | cancel_delayed_work_sync(&sess->maint_work); | |
257 | ||
258 | transport_deregister_session_configfs(sess->se_sess); | |
259 | transport_deregister_session(sess->se_sess); | |
260 | ||
261 | if (sess->card) | |
262 | fw_card_put(sess->card); | |
263 | ||
264 | kfree(sess); | |
265 | } | |
266 | ||
267 | static void sbp_target_agent_unregister(struct sbp_target_agent *); | |
268 | ||
269 | static void sbp_login_release(struct sbp_login_descriptor *login, | |
270 | bool cancel_work) | |
271 | { | |
272 | struct sbp_session *sess = login->sess; | |
273 | ||
274 | /* FIXME: abort/wait on tasks */ | |
275 | ||
276 | sbp_target_agent_unregister(login->tgt_agt); | |
277 | ||
278 | if (sess) { | |
279 | spin_lock_bh(&sess->lock); | |
280 | list_del(&login->link); | |
281 | spin_unlock_bh(&sess->lock); | |
282 | ||
283 | sbp_session_release(sess, cancel_work); | |
284 | } | |
285 | ||
286 | kfree(login); | |
287 | } | |
288 | ||
289 | static struct sbp_target_agent *sbp_target_agent_register( | |
290 | struct sbp_login_descriptor *); | |
291 | ||
292 | static void sbp_management_request_login( | |
293 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
294 | int *status_data_size) | |
295 | { | |
296 | struct sbp_tport *tport = agent->tport; | |
297 | struct sbp_tpg *tpg = tport->tpg; | |
298 | struct se_lun *se_lun; | |
299 | int ret; | |
300 | u64 guid; | |
301 | struct sbp_session *sess; | |
302 | struct sbp_login_descriptor *login; | |
303 | struct sbp_login_response_block *response; | |
304 | int login_response_len; | |
305 | ||
306 | se_lun = sbp_get_lun_from_tpg(tpg, | |
307 | LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc))); | |
308 | if (IS_ERR(se_lun)) { | |
309 | pr_notice("login to unknown LUN: %d\n", | |
310 | LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc))); | |
311 | ||
312 | req->status.status = cpu_to_be32( | |
313 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
314 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LUN_NOTSUPP)); | |
315 | return; | |
316 | } | |
317 | ||
318 | ret = read_peer_guid(&guid, req); | |
319 | if (ret != RCODE_COMPLETE) { | |
320 | pr_warn("failed to read peer GUID: %d\n", ret); | |
321 | ||
322 | req->status.status = cpu_to_be32( | |
323 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
324 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
325 | return; | |
326 | } | |
327 | ||
328 | pr_notice("mgt_agent LOGIN to LUN %d from %016llx\n", | |
329 | se_lun->unpacked_lun, guid); | |
330 | ||
331 | sess = sbp_session_find_by_guid(tpg, guid); | |
332 | if (sess) { | |
333 | login = sbp_login_find_by_lun(sess, se_lun); | |
334 | if (login) { | |
335 | pr_notice("initiator already logged-in\n"); | |
336 | ||
337 | /* | |
338 | * SBP-2 R4 says we should return access denied, but | |
339 | * that can confuse initiators. Instead we need to | |
340 | * treat this like a reconnect, but send the login | |
341 | * response block like a fresh login. | |
342 | * | |
343 | * This is required particularly in the case of Apple | |
344 | * devices booting off the FireWire target, where | |
345 | * the firmware has an active login to the target. When | |
346 | * the OS takes control of the session it issues its own | |
347 | * LOGIN rather than a RECONNECT. To avoid the machine | |
348 | * waiting until the reconnect_hold expires, we can skip | |
349 | * the ACCESS_DENIED errors to speed things up. | |
350 | */ | |
351 | ||
352 | goto already_logged_in; | |
353 | } | |
354 | } | |
355 | ||
356 | /* | |
357 | * check exclusive bit in login request | |
358 | * reject with access_denied if any logins present | |
359 | */ | |
360 | if (LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)) && | |
361 | sbp_login_count_all_by_lun(tpg, se_lun, 0)) { | |
362 | pr_warn("refusing exclusive login with other active logins\n"); | |
363 | ||
364 | req->status.status = cpu_to_be32( | |
365 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
366 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
367 | return; | |
368 | } | |
369 | ||
370 | /* | |
371 | * check exclusive bit in any existing login descriptor | |
372 | * reject with access_denied if any exclusive logins present | |
373 | */ | |
374 | if (sbp_login_count_all_by_lun(tpg, se_lun, 1)) { | |
375 | pr_warn("refusing login while another exclusive login present\n"); | |
376 | ||
377 | req->status.status = cpu_to_be32( | |
378 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
379 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
380 | return; | |
381 | } | |
382 | ||
383 | /* | |
384 | * check we haven't exceeded the number of allowed logins | |
385 | * reject with resources_unavailable if we have | |
386 | */ | |
387 | if (sbp_login_count_all_by_lun(tpg, se_lun, 0) >= | |
388 | tport->max_logins_per_lun) { | |
389 | pr_warn("max number of logins reached\n"); | |
390 | ||
391 | req->status.status = cpu_to_be32( | |
392 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
393 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
394 | return; | |
395 | } | |
396 | ||
397 | if (!sess) { | |
398 | sess = sbp_session_create(tpg, guid); | |
399 | if (IS_ERR(sess)) { | |
400 | switch (PTR_ERR(sess)) { | |
401 | case -EPERM: | |
402 | ret = SBP_STATUS_ACCESS_DENIED; | |
403 | break; | |
404 | default: | |
405 | ret = SBP_STATUS_RESOURCES_UNAVAIL; | |
406 | break; | |
407 | } | |
408 | ||
409 | req->status.status = cpu_to_be32( | |
410 | STATUS_BLOCK_RESP( | |
411 | STATUS_RESP_REQUEST_COMPLETE) | | |
412 | STATUS_BLOCK_SBP_STATUS(ret)); | |
413 | return; | |
414 | } | |
415 | ||
416 | sess->node_id = req->node_addr; | |
417 | sess->card = fw_card_get(req->card); | |
418 | sess->generation = req->generation; | |
419 | sess->speed = req->speed; | |
420 | ||
421 | schedule_delayed_work(&sess->maint_work, | |
422 | SESSION_MAINTENANCE_INTERVAL); | |
423 | } | |
424 | ||
425 | /* only take the latest reconnect_hold into account */ | |
426 | sess->reconnect_hold = min( | |
427 | 1 << LOGIN_ORB_RECONNECT(be32_to_cpu(req->orb.misc)), | |
428 | tport->max_reconnect_timeout) - 1; | |
429 | ||
430 | login = kmalloc(sizeof(*login), GFP_KERNEL); | |
431 | if (!login) { | |
432 | pr_err("failed to allocate login descriptor\n"); | |
433 | ||
434 | sbp_session_release(sess, true); | |
435 | ||
436 | req->status.status = cpu_to_be32( | |
437 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
438 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
439 | return; | |
440 | } | |
441 | ||
442 | login->sess = sess; | |
443 | login->lun = se_lun; | |
444 | login->status_fifo_addr = sbp2_pointer_to_addr(&req->orb.status_fifo); | |
445 | login->exclusive = LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)); | |
446 | login->login_id = atomic_inc_return(&login_id); | |
447 | ||
448 | login->tgt_agt = sbp_target_agent_register(login); | |
449 | if (IS_ERR(login->tgt_agt)) { | |
450 | ret = PTR_ERR(login->tgt_agt); | |
451 | pr_err("failed to map command block handler: %d\n", ret); | |
452 | ||
453 | sbp_session_release(sess, true); | |
454 | kfree(login); | |
455 | ||
456 | req->status.status = cpu_to_be32( | |
457 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
458 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
459 | return; | |
460 | } | |
461 | ||
462 | spin_lock_bh(&sess->lock); | |
463 | list_add_tail(&login->link, &sess->login_list); | |
464 | spin_unlock_bh(&sess->lock); | |
465 | ||
466 | already_logged_in: | |
467 | response = kzalloc(sizeof(*response), GFP_KERNEL); | |
468 | if (!response) { | |
469 | pr_err("failed to allocate login response block\n"); | |
470 | ||
471 | sbp_login_release(login, true); | |
472 | ||
473 | req->status.status = cpu_to_be32( | |
474 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
475 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
476 | return; | |
477 | } | |
478 | ||
479 | login_response_len = clamp_val( | |
480 | LOGIN_ORB_RESPONSE_LENGTH(be32_to_cpu(req->orb.length)), | |
481 | 12, sizeof(*response)); | |
482 | response->misc = cpu_to_be32( | |
483 | ((login_response_len & 0xffff) << 16) | | |
484 | (login->login_id & 0xffff)); | |
485 | response->reconnect_hold = cpu_to_be32(sess->reconnect_hold & 0xffff); | |
486 | addr_to_sbp2_pointer(login->tgt_agt->handler.offset, | |
487 | &response->command_block_agent); | |
488 | ||
489 | ret = sbp_run_transaction(sess->card, TCODE_WRITE_BLOCK_REQUEST, | |
490 | sess->node_id, sess->generation, sess->speed, | |
491 | sbp2_pointer_to_addr(&req->orb.ptr2), response, | |
492 | login_response_len); | |
493 | if (ret != RCODE_COMPLETE) { | |
494 | pr_debug("failed to write login response block: %x\n", ret); | |
495 | ||
496 | kfree(response); | |
497 | sbp_login_release(login, true); | |
498 | ||
499 | req->status.status = cpu_to_be32( | |
500 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
501 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
502 | return; | |
503 | } | |
504 | ||
505 | kfree(response); | |
506 | ||
507 | req->status.status = cpu_to_be32( | |
508 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
509 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
510 | } | |
511 | ||
512 | static void sbp_management_request_query_logins( | |
513 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
514 | int *status_data_size) | |
515 | { | |
516 | pr_notice("QUERY LOGINS not implemented\n"); | |
517 | /* FIXME: implement */ | |
518 | ||
519 | req->status.status = cpu_to_be32( | |
520 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
521 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
522 | } | |
523 | ||
524 | static void sbp_management_request_reconnect( | |
525 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
526 | int *status_data_size) | |
527 | { | |
528 | struct sbp_tport *tport = agent->tport; | |
529 | struct sbp_tpg *tpg = tport->tpg; | |
530 | int ret; | |
531 | u64 guid; | |
532 | struct sbp_login_descriptor *login; | |
533 | ||
534 | ret = read_peer_guid(&guid, req); | |
535 | if (ret != RCODE_COMPLETE) { | |
536 | pr_warn("failed to read peer GUID: %d\n", ret); | |
537 | ||
538 | req->status.status = cpu_to_be32( | |
539 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
540 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
541 | return; | |
542 | } | |
543 | ||
544 | pr_notice("mgt_agent RECONNECT from %016llx\n", guid); | |
545 | ||
546 | login = sbp_login_find_by_id(tpg, | |
547 | RECONNECT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc))); | |
548 | ||
549 | if (!login) { | |
550 | pr_err("mgt_agent RECONNECT unknown login ID\n"); | |
551 | ||
552 | req->status.status = cpu_to_be32( | |
553 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
554 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
555 | return; | |
556 | } | |
557 | ||
558 | if (login->sess->guid != guid) { | |
559 | pr_err("mgt_agent RECONNECT login GUID doesn't match\n"); | |
560 | ||
561 | req->status.status = cpu_to_be32( | |
562 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
563 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
564 | return; | |
565 | } | |
566 | ||
567 | spin_lock_bh(&login->sess->lock); | |
568 | if (login->sess->card) | |
569 | fw_card_put(login->sess->card); | |
570 | ||
571 | /* update the node details */ | |
572 | login->sess->generation = req->generation; | |
573 | login->sess->node_id = req->node_addr; | |
574 | login->sess->card = fw_card_get(req->card); | |
575 | login->sess->speed = req->speed; | |
576 | spin_unlock_bh(&login->sess->lock); | |
577 | ||
578 | req->status.status = cpu_to_be32( | |
579 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
580 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
581 | } | |
582 | ||
583 | static void sbp_management_request_logout( | |
584 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
585 | int *status_data_size) | |
586 | { | |
587 | struct sbp_tport *tport = agent->tport; | |
588 | struct sbp_tpg *tpg = tport->tpg; | |
5f2a3d61 | 589 | int id; |
a511ce33 CB |
590 | struct sbp_login_descriptor *login; |
591 | ||
5f2a3d61 | 592 | id = LOGOUT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc)); |
a511ce33 | 593 | |
5f2a3d61 | 594 | login = sbp_login_find_by_id(tpg, id); |
a511ce33 | 595 | if (!login) { |
5f2a3d61 | 596 | pr_warn("cannot find login: %d\n", id); |
a511ce33 CB |
597 | |
598 | req->status.status = cpu_to_be32( | |
599 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
600 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LOGIN_ID_UNKNOWN)); | |
601 | return; | |
602 | } | |
603 | ||
604 | pr_info("mgt_agent LOGOUT from LUN %d session %d\n", | |
605 | login->lun->unpacked_lun, login->login_id); | |
606 | ||
607 | if (req->node_addr != login->sess->node_id) { | |
608 | pr_warn("logout from different node ID\n"); | |
609 | ||
610 | req->status.status = cpu_to_be32( | |
611 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
612 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
613 | return; | |
614 | } | |
615 | ||
616 | sbp_login_release(login, true); | |
617 | ||
618 | req->status.status = cpu_to_be32( | |
619 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
620 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
621 | } | |
622 | ||
623 | static void session_check_for_reset(struct sbp_session *sess) | |
624 | { | |
625 | bool card_valid = false; | |
626 | ||
627 | spin_lock_bh(&sess->lock); | |
628 | ||
629 | if (sess->card) { | |
630 | spin_lock_irq(&sess->card->lock); | |
631 | card_valid = (sess->card->local_node != NULL); | |
632 | spin_unlock_irq(&sess->card->lock); | |
633 | ||
634 | if (!card_valid) { | |
635 | fw_card_put(sess->card); | |
636 | sess->card = NULL; | |
637 | } | |
638 | } | |
639 | ||
640 | if (!card_valid || (sess->generation != sess->card->generation)) { | |
641 | pr_info("Waiting for reconnect from node: %016llx\n", | |
642 | sess->guid); | |
643 | ||
644 | sess->node_id = -1; | |
645 | sess->reconnect_expires = get_jiffies_64() + | |
646 | ((sess->reconnect_hold + 1) * HZ); | |
647 | } | |
648 | ||
649 | spin_unlock_bh(&sess->lock); | |
650 | } | |
651 | ||
652 | static void session_reconnect_expired(struct sbp_session *sess) | |
653 | { | |
654 | struct sbp_login_descriptor *login, *temp; | |
655 | LIST_HEAD(login_list); | |
656 | ||
657 | pr_info("Reconnect timer expired for node: %016llx\n", sess->guid); | |
658 | ||
659 | spin_lock_bh(&sess->lock); | |
660 | list_for_each_entry_safe(login, temp, &sess->login_list, link) { | |
661 | login->sess = NULL; | |
bf11eefc | 662 | list_move_tail(&login->link, &login_list); |
a511ce33 CB |
663 | } |
664 | spin_unlock_bh(&sess->lock); | |
665 | ||
666 | list_for_each_entry_safe(login, temp, &login_list, link) { | |
667 | list_del(&login->link); | |
668 | sbp_login_release(login, false); | |
669 | } | |
670 | ||
671 | sbp_session_release(sess, false); | |
672 | } | |
673 | ||
674 | static void session_maintenance_work(struct work_struct *work) | |
675 | { | |
676 | struct sbp_session *sess = container_of(work, struct sbp_session, | |
677 | maint_work.work); | |
678 | ||
679 | /* could be called while tearing down the session */ | |
680 | spin_lock_bh(&sess->lock); | |
681 | if (list_empty(&sess->login_list)) { | |
682 | spin_unlock_bh(&sess->lock); | |
683 | return; | |
684 | } | |
685 | spin_unlock_bh(&sess->lock); | |
686 | ||
687 | if (sess->node_id != -1) { | |
688 | /* check for bus reset and make node_id invalid */ | |
689 | session_check_for_reset(sess); | |
690 | ||
691 | schedule_delayed_work(&sess->maint_work, | |
692 | SESSION_MAINTENANCE_INTERVAL); | |
693 | } else if (!time_after64(get_jiffies_64(), sess->reconnect_expires)) { | |
694 | /* still waiting for reconnect */ | |
695 | schedule_delayed_work(&sess->maint_work, | |
696 | SESSION_MAINTENANCE_INTERVAL); | |
697 | } else { | |
698 | /* reconnect timeout has expired */ | |
699 | session_reconnect_expired(sess); | |
700 | } | |
701 | } | |
702 | ||
703 | static int tgt_agent_rw_agent_state(struct fw_card *card, int tcode, void *data, | |
704 | struct sbp_target_agent *agent) | |
705 | { | |
37419d67 | 706 | int state; |
a511ce33 CB |
707 | |
708 | switch (tcode) { | |
709 | case TCODE_READ_QUADLET_REQUEST: | |
710 | pr_debug("tgt_agent AGENT_STATE READ\n"); | |
711 | ||
712 | spin_lock_bh(&agent->lock); | |
37419d67 | 713 | state = agent->state; |
a511ce33 | 714 | spin_unlock_bh(&agent->lock); |
37419d67 CB |
715 | |
716 | *(__be32 *)data = cpu_to_be32(state); | |
a511ce33 CB |
717 | |
718 | return RCODE_COMPLETE; | |
719 | ||
720 | case TCODE_WRITE_QUADLET_REQUEST: | |
721 | /* ignored */ | |
722 | return RCODE_COMPLETE; | |
723 | ||
724 | default: | |
725 | return RCODE_TYPE_ERROR; | |
726 | } | |
727 | } | |
728 | ||
729 | static int tgt_agent_rw_agent_reset(struct fw_card *card, int tcode, void *data, | |
730 | struct sbp_target_agent *agent) | |
731 | { | |
732 | switch (tcode) { | |
733 | case TCODE_WRITE_QUADLET_REQUEST: | |
734 | pr_debug("tgt_agent AGENT_RESET\n"); | |
735 | spin_lock_bh(&agent->lock); | |
736 | agent->state = AGENT_STATE_RESET; | |
737 | spin_unlock_bh(&agent->lock); | |
738 | return RCODE_COMPLETE; | |
739 | ||
740 | default: | |
741 | return RCODE_TYPE_ERROR; | |
742 | } | |
743 | } | |
744 | ||
745 | static int tgt_agent_rw_orb_pointer(struct fw_card *card, int tcode, void *data, | |
746 | struct sbp_target_agent *agent) | |
747 | { | |
748 | struct sbp2_pointer *ptr = data; | |
749 | ||
750 | switch (tcode) { | |
751 | case TCODE_WRITE_BLOCK_REQUEST: | |
752 | spin_lock_bh(&agent->lock); | |
753 | if (agent->state != AGENT_STATE_SUSPENDED && | |
754 | agent->state != AGENT_STATE_RESET) { | |
755 | spin_unlock_bh(&agent->lock); | |
756 | pr_notice("Ignoring ORB_POINTER write while active.\n"); | |
757 | return RCODE_CONFLICT_ERROR; | |
758 | } | |
759 | agent->state = AGENT_STATE_ACTIVE; | |
760 | spin_unlock_bh(&agent->lock); | |
761 | ||
762 | agent->orb_pointer = sbp2_pointer_to_addr(ptr); | |
763 | agent->doorbell = false; | |
764 | ||
765 | pr_debug("tgt_agent ORB_POINTER write: 0x%llx\n", | |
766 | agent->orb_pointer); | |
767 | ||
768 | queue_work(system_unbound_wq, &agent->work); | |
769 | ||
770 | return RCODE_COMPLETE; | |
771 | ||
772 | case TCODE_READ_BLOCK_REQUEST: | |
773 | pr_debug("tgt_agent ORB_POINTER READ\n"); | |
774 | spin_lock_bh(&agent->lock); | |
775 | addr_to_sbp2_pointer(agent->orb_pointer, ptr); | |
776 | spin_unlock_bh(&agent->lock); | |
777 | return RCODE_COMPLETE; | |
778 | ||
779 | default: | |
780 | return RCODE_TYPE_ERROR; | |
781 | } | |
782 | } | |
783 | ||
784 | static int tgt_agent_rw_doorbell(struct fw_card *card, int tcode, void *data, | |
785 | struct sbp_target_agent *agent) | |
786 | { | |
787 | switch (tcode) { | |
788 | case TCODE_WRITE_QUADLET_REQUEST: | |
789 | spin_lock_bh(&agent->lock); | |
790 | if (agent->state != AGENT_STATE_SUSPENDED) { | |
791 | spin_unlock_bh(&agent->lock); | |
792 | pr_debug("Ignoring DOORBELL while active.\n"); | |
793 | return RCODE_CONFLICT_ERROR; | |
794 | } | |
795 | agent->state = AGENT_STATE_ACTIVE; | |
796 | spin_unlock_bh(&agent->lock); | |
797 | ||
798 | agent->doorbell = true; | |
799 | ||
800 | pr_debug("tgt_agent DOORBELL\n"); | |
801 | ||
802 | queue_work(system_unbound_wq, &agent->work); | |
803 | ||
804 | return RCODE_COMPLETE; | |
805 | ||
806 | case TCODE_READ_QUADLET_REQUEST: | |
807 | return RCODE_COMPLETE; | |
808 | ||
809 | default: | |
810 | return RCODE_TYPE_ERROR; | |
811 | } | |
812 | } | |
813 | ||
814 | static int tgt_agent_rw_unsolicited_status_enable(struct fw_card *card, | |
815 | int tcode, void *data, struct sbp_target_agent *agent) | |
816 | { | |
817 | switch (tcode) { | |
818 | case TCODE_WRITE_QUADLET_REQUEST: | |
819 | pr_debug("tgt_agent UNSOLICITED_STATUS_ENABLE\n"); | |
820 | /* ignored as we don't send unsolicited status */ | |
821 | return RCODE_COMPLETE; | |
822 | ||
823 | case TCODE_READ_QUADLET_REQUEST: | |
824 | return RCODE_COMPLETE; | |
825 | ||
826 | default: | |
827 | return RCODE_TYPE_ERROR; | |
828 | } | |
829 | } | |
830 | ||
831 | static void tgt_agent_rw(struct fw_card *card, struct fw_request *request, | |
832 | int tcode, int destination, int source, int generation, | |
833 | unsigned long long offset, void *data, size_t length, | |
834 | void *callback_data) | |
835 | { | |
836 | struct sbp_target_agent *agent = callback_data; | |
837 | struct sbp_session *sess = agent->login->sess; | |
838 | int sess_gen, sess_node, rcode; | |
839 | ||
840 | spin_lock_bh(&sess->lock); | |
841 | sess_gen = sess->generation; | |
842 | sess_node = sess->node_id; | |
843 | spin_unlock_bh(&sess->lock); | |
844 | ||
845 | if (generation != sess_gen) { | |
846 | pr_notice("ignoring request with wrong generation\n"); | |
847 | rcode = RCODE_TYPE_ERROR; | |
848 | goto out; | |
849 | } | |
850 | ||
851 | if (source != sess_node) { | |
852 | pr_notice("ignoring request from foreign node (%x != %x)\n", | |
853 | source, sess_node); | |
854 | rcode = RCODE_TYPE_ERROR; | |
855 | goto out; | |
856 | } | |
857 | ||
858 | /* turn offset into the offset from the start of the block */ | |
859 | offset -= agent->handler.offset; | |
860 | ||
861 | if (offset == 0x00 && length == 4) { | |
862 | /* AGENT_STATE */ | |
863 | rcode = tgt_agent_rw_agent_state(card, tcode, data, agent); | |
864 | } else if (offset == 0x04 && length == 4) { | |
865 | /* AGENT_RESET */ | |
866 | rcode = tgt_agent_rw_agent_reset(card, tcode, data, agent); | |
867 | } else if (offset == 0x08 && length == 8) { | |
868 | /* ORB_POINTER */ | |
869 | rcode = tgt_agent_rw_orb_pointer(card, tcode, data, agent); | |
870 | } else if (offset == 0x10 && length == 4) { | |
871 | /* DOORBELL */ | |
872 | rcode = tgt_agent_rw_doorbell(card, tcode, data, agent); | |
873 | } else if (offset == 0x14 && length == 4) { | |
874 | /* UNSOLICITED_STATUS_ENABLE */ | |
875 | rcode = tgt_agent_rw_unsolicited_status_enable(card, tcode, | |
876 | data, agent); | |
877 | } else { | |
878 | rcode = RCODE_ADDRESS_ERROR; | |
879 | } | |
880 | ||
881 | out: | |
882 | fw_send_response(card, request, rcode); | |
883 | } | |
884 | ||
885 | static void sbp_handle_command(struct sbp_target_request *); | |
886 | static int sbp_send_status(struct sbp_target_request *); | |
887 | static void sbp_free_request(struct sbp_target_request *); | |
888 | ||
889 | static void tgt_agent_process_work(struct work_struct *work) | |
890 | { | |
891 | struct sbp_target_request *req = | |
892 | container_of(work, struct sbp_target_request, work); | |
893 | ||
894 | pr_debug("tgt_orb ptr:0x%llx next_ORB:0x%llx data_descriptor:0x%llx misc:0x%x\n", | |
895 | req->orb_pointer, | |
896 | sbp2_pointer_to_addr(&req->orb.next_orb), | |
897 | sbp2_pointer_to_addr(&req->orb.data_descriptor), | |
898 | be32_to_cpu(req->orb.misc)); | |
899 | ||
900 | if (req->orb_pointer >> 32) | |
901 | pr_debug("ORB with high bits set\n"); | |
902 | ||
903 | switch (ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc))) { | |
904 | case 0:/* Format specified by this standard */ | |
905 | sbp_handle_command(req); | |
906 | return; | |
907 | case 1: /* Reserved for future standardization */ | |
908 | case 2: /* Vendor-dependent */ | |
909 | req->status.status |= cpu_to_be32( | |
910 | STATUS_BLOCK_RESP( | |
911 | STATUS_RESP_REQUEST_COMPLETE) | | |
912 | STATUS_BLOCK_DEAD(0) | | |
913 | STATUS_BLOCK_LEN(1) | | |
914 | STATUS_BLOCK_SBP_STATUS( | |
915 | SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
916 | sbp_send_status(req); | |
917 | sbp_free_request(req); | |
918 | return; | |
919 | case 3: /* Dummy ORB */ | |
920 | req->status.status |= cpu_to_be32( | |
921 | STATUS_BLOCK_RESP( | |
922 | STATUS_RESP_REQUEST_COMPLETE) | | |
923 | STATUS_BLOCK_DEAD(0) | | |
924 | STATUS_BLOCK_LEN(1) | | |
925 | STATUS_BLOCK_SBP_STATUS( | |
926 | SBP_STATUS_DUMMY_ORB_COMPLETE)); | |
927 | sbp_send_status(req); | |
928 | sbp_free_request(req); | |
929 | return; | |
930 | default: | |
931 | BUG(); | |
932 | } | |
933 | } | |
934 | ||
935 | /* used to double-check we haven't been issued an AGENT_RESET */ | |
936 | static inline bool tgt_agent_check_active(struct sbp_target_agent *agent) | |
937 | { | |
938 | bool active; | |
939 | ||
940 | spin_lock_bh(&agent->lock); | |
941 | active = (agent->state == AGENT_STATE_ACTIVE); | |
942 | spin_unlock_bh(&agent->lock); | |
943 | ||
944 | return active; | |
945 | } | |
946 | ||
947 | static void tgt_agent_fetch_work(struct work_struct *work) | |
948 | { | |
949 | struct sbp_target_agent *agent = | |
950 | container_of(work, struct sbp_target_agent, work); | |
951 | struct sbp_session *sess = agent->login->sess; | |
952 | struct sbp_target_request *req; | |
953 | int ret; | |
954 | bool doorbell = agent->doorbell; | |
955 | u64 next_orb = agent->orb_pointer; | |
956 | ||
957 | while (next_orb && tgt_agent_check_active(agent)) { | |
958 | req = kzalloc(sizeof(*req), GFP_KERNEL); | |
959 | if (!req) { | |
960 | spin_lock_bh(&agent->lock); | |
961 | agent->state = AGENT_STATE_DEAD; | |
962 | spin_unlock_bh(&agent->lock); | |
963 | return; | |
964 | } | |
965 | ||
966 | req->login = agent->login; | |
967 | req->orb_pointer = next_orb; | |
968 | ||
969 | req->status.status = cpu_to_be32(STATUS_BLOCK_ORB_OFFSET_HIGH( | |
970 | req->orb_pointer >> 32)); | |
971 | req->status.orb_low = cpu_to_be32( | |
972 | req->orb_pointer & 0xfffffffc); | |
973 | ||
974 | /* read in the ORB */ | |
975 | ret = sbp_run_transaction(sess->card, TCODE_READ_BLOCK_REQUEST, | |
976 | sess->node_id, sess->generation, sess->speed, | |
977 | req->orb_pointer, &req->orb, sizeof(req->orb)); | |
978 | if (ret != RCODE_COMPLETE) { | |
979 | pr_debug("tgt_orb fetch failed: %x\n", ret); | |
980 | req->status.status |= cpu_to_be32( | |
981 | STATUS_BLOCK_SRC( | |
982 | STATUS_SRC_ORB_FINISHED) | | |
983 | STATUS_BLOCK_RESP( | |
984 | STATUS_RESP_TRANSPORT_FAILURE) | | |
985 | STATUS_BLOCK_DEAD(1) | | |
986 | STATUS_BLOCK_LEN(1) | | |
987 | STATUS_BLOCK_SBP_STATUS( | |
988 | SBP_STATUS_UNSPECIFIED_ERROR)); | |
989 | spin_lock_bh(&agent->lock); | |
990 | agent->state = AGENT_STATE_DEAD; | |
991 | spin_unlock_bh(&agent->lock); | |
992 | ||
993 | sbp_send_status(req); | |
994 | sbp_free_request(req); | |
995 | return; | |
996 | } | |
997 | ||
998 | /* check the next_ORB field */ | |
999 | if (be32_to_cpu(req->orb.next_orb.high) & 0x80000000) { | |
1000 | next_orb = 0; | |
1001 | req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC( | |
1002 | STATUS_SRC_ORB_FINISHED)); | |
1003 | } else { | |
1004 | next_orb = sbp2_pointer_to_addr(&req->orb.next_orb); | |
1005 | req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC( | |
1006 | STATUS_SRC_ORB_CONTINUING)); | |
1007 | } | |
1008 | ||
1009 | if (tgt_agent_check_active(agent) && !doorbell) { | |
1010 | INIT_WORK(&req->work, tgt_agent_process_work); | |
1011 | queue_work(system_unbound_wq, &req->work); | |
1012 | } else { | |
1013 | /* don't process this request, just check next_ORB */ | |
1014 | sbp_free_request(req); | |
1015 | } | |
1016 | ||
1017 | spin_lock_bh(&agent->lock); | |
1018 | doorbell = agent->doorbell = false; | |
1019 | ||
1020 | /* check if we should carry on processing */ | |
1021 | if (next_orb) | |
1022 | agent->orb_pointer = next_orb; | |
1023 | else | |
1024 | agent->state = AGENT_STATE_SUSPENDED; | |
1025 | ||
1026 | spin_unlock_bh(&agent->lock); | |
1027 | }; | |
1028 | } | |
1029 | ||
1030 | static struct sbp_target_agent *sbp_target_agent_register( | |
1031 | struct sbp_login_descriptor *login) | |
1032 | { | |
1033 | struct sbp_target_agent *agent; | |
1034 | int ret; | |
1035 | ||
1036 | agent = kmalloc(sizeof(*agent), GFP_KERNEL); | |
1037 | if (!agent) | |
1038 | return ERR_PTR(-ENOMEM); | |
1039 | ||
1040 | spin_lock_init(&agent->lock); | |
1041 | ||
1042 | agent->handler.length = 0x20; | |
1043 | agent->handler.address_callback = tgt_agent_rw; | |
1044 | agent->handler.callback_data = agent; | |
1045 | ||
1046 | agent->login = login; | |
1047 | agent->state = AGENT_STATE_RESET; | |
1048 | INIT_WORK(&agent->work, tgt_agent_fetch_work); | |
1049 | agent->orb_pointer = 0; | |
1050 | agent->doorbell = false; | |
1051 | ||
1052 | ret = fw_core_add_address_handler(&agent->handler, | |
1053 | &sbp_register_region); | |
1054 | if (ret < 0) { | |
1055 | kfree(agent); | |
1056 | return ERR_PTR(ret); | |
1057 | } | |
1058 | ||
1059 | return agent; | |
1060 | } | |
1061 | ||
1062 | static void sbp_target_agent_unregister(struct sbp_target_agent *agent) | |
1063 | { | |
1064 | fw_core_remove_address_handler(&agent->handler); | |
1065 | cancel_work_sync(&agent->work); | |
1066 | kfree(agent); | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * Simple wrapper around fw_run_transaction that retries the transaction several | |
1071 | * times in case of failure, with an exponential backoff. | |
1072 | */ | |
1073 | static int sbp_run_transaction(struct fw_card *card, int tcode, int destination_id, | |
1074 | int generation, int speed, unsigned long long offset, | |
1075 | void *payload, size_t length) | |
1076 | { | |
1077 | int attempt, ret, delay; | |
1078 | ||
1079 | for (attempt = 1; attempt <= 5; attempt++) { | |
1080 | ret = fw_run_transaction(card, tcode, destination_id, | |
1081 | generation, speed, offset, payload, length); | |
1082 | ||
1083 | switch (ret) { | |
1084 | case RCODE_COMPLETE: | |
1085 | case RCODE_TYPE_ERROR: | |
1086 | case RCODE_ADDRESS_ERROR: | |
1087 | case RCODE_GENERATION: | |
1088 | return ret; | |
1089 | ||
1090 | default: | |
1091 | delay = 5 * attempt * attempt; | |
1092 | usleep_range(delay, delay * 2); | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | return ret; | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Wrapper around sbp_run_transaction that gets the card, destination, | |
1101 | * generation and speed out of the request's session. | |
1102 | */ | |
1103 | static int sbp_run_request_transaction(struct sbp_target_request *req, | |
1104 | int tcode, unsigned long long offset, void *payload, | |
1105 | size_t length) | |
1106 | { | |
1107 | struct sbp_login_descriptor *login = req->login; | |
1108 | struct sbp_session *sess = login->sess; | |
1109 | struct fw_card *card; | |
1110 | int node_id, generation, speed, ret; | |
1111 | ||
1112 | spin_lock_bh(&sess->lock); | |
1113 | card = fw_card_get(sess->card); | |
1114 | node_id = sess->node_id; | |
1115 | generation = sess->generation; | |
1116 | speed = sess->speed; | |
1117 | spin_unlock_bh(&sess->lock); | |
1118 | ||
1119 | ret = sbp_run_transaction(card, tcode, node_id, generation, speed, | |
1120 | offset, payload, length); | |
1121 | ||
1122 | fw_card_put(card); | |
1123 | ||
1124 | return ret; | |
1125 | } | |
1126 | ||
1127 | static int sbp_fetch_command(struct sbp_target_request *req) | |
1128 | { | |
1129 | int ret, cmd_len, copy_len; | |
1130 | ||
1131 | cmd_len = scsi_command_size(req->orb.command_block); | |
1132 | ||
1133 | req->cmd_buf = kmalloc(cmd_len, GFP_KERNEL); | |
1134 | if (!req->cmd_buf) | |
1135 | return -ENOMEM; | |
1136 | ||
1137 | memcpy(req->cmd_buf, req->orb.command_block, | |
1138 | min_t(int, cmd_len, sizeof(req->orb.command_block))); | |
1139 | ||
1140 | if (cmd_len > sizeof(req->orb.command_block)) { | |
1141 | pr_debug("sbp_fetch_command: filling in long command\n"); | |
1142 | copy_len = cmd_len - sizeof(req->orb.command_block); | |
1143 | ||
1144 | ret = sbp_run_request_transaction(req, | |
1145 | TCODE_READ_BLOCK_REQUEST, | |
1146 | req->orb_pointer + sizeof(req->orb), | |
1147 | req->cmd_buf + sizeof(req->orb.command_block), | |
1148 | copy_len); | |
1149 | if (ret != RCODE_COMPLETE) | |
1150 | return -EIO; | |
1151 | } | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | static int sbp_fetch_page_table(struct sbp_target_request *req) | |
1157 | { | |
1158 | int pg_tbl_sz, ret; | |
1159 | struct sbp_page_table_entry *pg_tbl; | |
1160 | ||
1161 | if (!CMDBLK_ORB_PG_TBL_PRESENT(be32_to_cpu(req->orb.misc))) | |
1162 | return 0; | |
1163 | ||
1164 | pg_tbl_sz = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)) * | |
1165 | sizeof(struct sbp_page_table_entry); | |
1166 | ||
1167 | pg_tbl = kmalloc(pg_tbl_sz, GFP_KERNEL); | |
1168 | if (!pg_tbl) | |
1169 | return -ENOMEM; | |
1170 | ||
1171 | ret = sbp_run_request_transaction(req, TCODE_READ_BLOCK_REQUEST, | |
1172 | sbp2_pointer_to_addr(&req->orb.data_descriptor), | |
1173 | pg_tbl, pg_tbl_sz); | |
1174 | if (ret != RCODE_COMPLETE) { | |
1175 | kfree(pg_tbl); | |
1176 | return -EIO; | |
1177 | } | |
1178 | ||
1179 | req->pg_tbl = pg_tbl; | |
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | static void sbp_calc_data_length_direction(struct sbp_target_request *req, | |
1184 | u32 *data_len, enum dma_data_direction *data_dir) | |
1185 | { | |
1186 | int data_size, direction, idx; | |
1187 | ||
1188 | data_size = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)); | |
1189 | direction = CMDBLK_ORB_DIRECTION(be32_to_cpu(req->orb.misc)); | |
1190 | ||
1191 | if (!data_size) { | |
1192 | *data_len = 0; | |
1193 | *data_dir = DMA_NONE; | |
1194 | return; | |
1195 | } | |
1196 | ||
1197 | *data_dir = direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1198 | ||
1199 | if (req->pg_tbl) { | |
1200 | *data_len = 0; | |
1201 | for (idx = 0; idx < data_size; idx++) { | |
1202 | *data_len += be16_to_cpu( | |
1203 | req->pg_tbl[idx].segment_length); | |
1204 | } | |
1205 | } else { | |
1206 | *data_len = data_size; | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | static void sbp_handle_command(struct sbp_target_request *req) | |
1211 | { | |
1212 | struct sbp_login_descriptor *login = req->login; | |
1213 | struct sbp_session *sess = login->sess; | |
1214 | int ret, unpacked_lun; | |
1215 | u32 data_length; | |
1216 | enum dma_data_direction data_dir; | |
1217 | ||
1218 | ret = sbp_fetch_command(req); | |
1219 | if (ret) { | |
1220 | pr_debug("sbp_handle_command: fetch command failed: %d\n", ret); | |
7c78b8de | 1221 | goto err; |
a511ce33 CB |
1222 | } |
1223 | ||
1224 | ret = sbp_fetch_page_table(req); | |
1225 | if (ret) { | |
1226 | pr_debug("sbp_handle_command: fetch page table failed: %d\n", | |
1227 | ret); | |
7c78b8de | 1228 | goto err; |
a511ce33 CB |
1229 | } |
1230 | ||
1231 | unpacked_lun = req->login->lun->unpacked_lun; | |
1232 | sbp_calc_data_length_direction(req, &data_length, &data_dir); | |
1233 | ||
1234 | pr_debug("sbp_handle_command ORB:0x%llx unpacked_lun:%d data_len:%d data_dir:%d\n", | |
1235 | req->orb_pointer, unpacked_lun, data_length, data_dir); | |
1236 | ||
d6dfc868 RD |
1237 | if (target_submit_cmd(&req->se_cmd, sess->se_sess, req->cmd_buf, |
1238 | req->sense_buf, unpacked_lun, data_length, | |
68d81f40 | 1239 | TCM_SIMPLE_TAG, data_dir, 0)) |
d6dfc868 RD |
1240 | goto err; |
1241 | ||
7c78b8de RD |
1242 | return; |
1243 | ||
1244 | err: | |
1245 | req->status.status |= cpu_to_be32( | |
1246 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1247 | STATUS_BLOCK_DEAD(0) | | |
1248 | STATUS_BLOCK_LEN(1) | | |
1249 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1250 | sbp_send_status(req); | |
1251 | sbp_free_request(req); | |
a511ce33 CB |
1252 | } |
1253 | ||
1254 | /* | |
1255 | * DMA_TO_DEVICE = read from initiator (SCSI WRITE) | |
1256 | * DMA_FROM_DEVICE = write to initiator (SCSI READ) | |
1257 | */ | |
1258 | static int sbp_rw_data(struct sbp_target_request *req) | |
1259 | { | |
1260 | struct sbp_session *sess = req->login->sess; | |
1261 | int tcode, sg_miter_flags, max_payload, pg_size, speed, node_id, | |
1262 | generation, num_pte, length, tfr_length, | |
1263 | rcode = RCODE_COMPLETE; | |
1264 | struct sbp_page_table_entry *pte; | |
1265 | unsigned long long offset; | |
1266 | struct fw_card *card; | |
1267 | struct sg_mapping_iter iter; | |
1268 | ||
1269 | if (req->se_cmd.data_direction == DMA_FROM_DEVICE) { | |
1270 | tcode = TCODE_WRITE_BLOCK_REQUEST; | |
1271 | sg_miter_flags = SG_MITER_FROM_SG; | |
1272 | } else { | |
1273 | tcode = TCODE_READ_BLOCK_REQUEST; | |
1274 | sg_miter_flags = SG_MITER_TO_SG; | |
1275 | } | |
1276 | ||
1277 | max_payload = 4 << CMDBLK_ORB_MAX_PAYLOAD(be32_to_cpu(req->orb.misc)); | |
1278 | speed = CMDBLK_ORB_SPEED(be32_to_cpu(req->orb.misc)); | |
1279 | ||
1280 | pg_size = CMDBLK_ORB_PG_SIZE(be32_to_cpu(req->orb.misc)); | |
1281 | if (pg_size) { | |
1282 | pr_err("sbp_run_transaction: page size ignored\n"); | |
1283 | pg_size = 0x100 << pg_size; | |
1284 | } | |
1285 | ||
1286 | spin_lock_bh(&sess->lock); | |
1287 | card = fw_card_get(sess->card); | |
1288 | node_id = sess->node_id; | |
1289 | generation = sess->generation; | |
1290 | spin_unlock_bh(&sess->lock); | |
1291 | ||
1292 | if (req->pg_tbl) { | |
1293 | pte = req->pg_tbl; | |
1294 | num_pte = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)); | |
1295 | ||
1296 | offset = 0; | |
1297 | length = 0; | |
1298 | } else { | |
1299 | pte = NULL; | |
1300 | num_pte = 0; | |
1301 | ||
1302 | offset = sbp2_pointer_to_addr(&req->orb.data_descriptor); | |
1303 | length = req->se_cmd.data_length; | |
1304 | } | |
1305 | ||
1306 | sg_miter_start(&iter, req->se_cmd.t_data_sg, req->se_cmd.t_data_nents, | |
1307 | sg_miter_flags); | |
1308 | ||
1309 | while (length || num_pte) { | |
1310 | if (!length) { | |
1311 | offset = (u64)be16_to_cpu(pte->segment_base_hi) << 32 | | |
1312 | be32_to_cpu(pte->segment_base_lo); | |
1313 | length = be16_to_cpu(pte->segment_length); | |
1314 | ||
1315 | pte++; | |
1316 | num_pte--; | |
1317 | } | |
1318 | ||
1319 | sg_miter_next(&iter); | |
1320 | ||
1321 | tfr_length = min3(length, max_payload, (int)iter.length); | |
1322 | ||
1323 | /* FIXME: take page_size into account */ | |
1324 | ||
1325 | rcode = sbp_run_transaction(card, tcode, node_id, | |
1326 | generation, speed, | |
1327 | offset, iter.addr, tfr_length); | |
1328 | ||
1329 | if (rcode != RCODE_COMPLETE) | |
1330 | break; | |
1331 | ||
1332 | length -= tfr_length; | |
1333 | offset += tfr_length; | |
1334 | iter.consumed = tfr_length; | |
1335 | } | |
1336 | ||
1337 | sg_miter_stop(&iter); | |
1338 | fw_card_put(card); | |
1339 | ||
1340 | if (rcode == RCODE_COMPLETE) { | |
1341 | WARN_ON(length != 0); | |
1342 | return 0; | |
1343 | } else { | |
1344 | return -EIO; | |
1345 | } | |
1346 | } | |
1347 | ||
1348 | static int sbp_send_status(struct sbp_target_request *req) | |
1349 | { | |
1350 | int ret, length; | |
1351 | struct sbp_login_descriptor *login = req->login; | |
1352 | ||
1353 | length = (((be32_to_cpu(req->status.status) >> 24) & 0x07) + 1) * 4; | |
1354 | ||
1355 | ret = sbp_run_request_transaction(req, TCODE_WRITE_BLOCK_REQUEST, | |
1356 | login->status_fifo_addr, &req->status, length); | |
1357 | if (ret != RCODE_COMPLETE) { | |
1358 | pr_debug("sbp_send_status: write failed: 0x%x\n", ret); | |
1359 | return -EIO; | |
1360 | } | |
1361 | ||
1362 | pr_debug("sbp_send_status: status write complete for ORB: 0x%llx\n", | |
1363 | req->orb_pointer); | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | static void sbp_sense_mangle(struct sbp_target_request *req) | |
1369 | { | |
1370 | struct se_cmd *se_cmd = &req->se_cmd; | |
1371 | u8 *sense = req->sense_buf; | |
1372 | u8 *status = req->status.data; | |
1373 | ||
1374 | WARN_ON(se_cmd->scsi_sense_length < 18); | |
1375 | ||
1376 | switch (sense[0] & 0x7f) { /* sfmt */ | |
1377 | case 0x70: /* current, fixed */ | |
1378 | status[0] = 0 << 6; | |
1379 | break; | |
1380 | case 0x71: /* deferred, fixed */ | |
1381 | status[0] = 1 << 6; | |
1382 | break; | |
1383 | case 0x72: /* current, descriptor */ | |
1384 | case 0x73: /* deferred, descriptor */ | |
1385 | default: | |
1386 | /* | |
1387 | * TODO: SBP-3 specifies what we should do with descriptor | |
1388 | * format sense data | |
1389 | */ | |
1390 | pr_err("sbp_send_sense: unknown sense format: 0x%x\n", | |
1391 | sense[0]); | |
1392 | req->status.status |= cpu_to_be32( | |
1393 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1394 | STATUS_BLOCK_DEAD(0) | | |
1395 | STATUS_BLOCK_LEN(1) | | |
1396 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQUEST_ABORTED)); | |
1397 | return; | |
1398 | } | |
1399 | ||
1400 | status[0] |= se_cmd->scsi_status & 0x3f;/* status */ | |
1401 | status[1] = | |
1402 | (sense[0] & 0x80) | /* valid */ | |
1403 | ((sense[2] & 0xe0) >> 1) | /* mark, eom, ili */ | |
1404 | (sense[2] & 0x0f); /* sense_key */ | |
1405 | status[2] = se_cmd->scsi_asc; /* sense_code */ | |
1406 | status[3] = se_cmd->scsi_ascq; /* sense_qualifier */ | |
1407 | ||
1408 | /* information */ | |
1409 | status[4] = sense[3]; | |
1410 | status[5] = sense[4]; | |
1411 | status[6] = sense[5]; | |
1412 | status[7] = sense[6]; | |
1413 | ||
1414 | /* CDB-dependent */ | |
1415 | status[8] = sense[8]; | |
1416 | status[9] = sense[9]; | |
1417 | status[10] = sense[10]; | |
1418 | status[11] = sense[11]; | |
1419 | ||
1420 | /* fru */ | |
1421 | status[12] = sense[14]; | |
1422 | ||
1423 | /* sense_key-dependent */ | |
1424 | status[13] = sense[15]; | |
1425 | status[14] = sense[16]; | |
1426 | status[15] = sense[17]; | |
1427 | ||
1428 | req->status.status |= cpu_to_be32( | |
1429 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1430 | STATUS_BLOCK_DEAD(0) | | |
1431 | STATUS_BLOCK_LEN(5) | | |
1432 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
1433 | } | |
1434 | ||
1435 | static int sbp_send_sense(struct sbp_target_request *req) | |
1436 | { | |
1437 | struct se_cmd *se_cmd = &req->se_cmd; | |
1438 | ||
1439 | if (se_cmd->scsi_sense_length) { | |
1440 | sbp_sense_mangle(req); | |
1441 | } else { | |
1442 | req->status.status |= cpu_to_be32( | |
1443 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1444 | STATUS_BLOCK_DEAD(0) | | |
1445 | STATUS_BLOCK_LEN(1) | | |
1446 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
1447 | } | |
1448 | ||
1449 | return sbp_send_status(req); | |
1450 | } | |
1451 | ||
1452 | static void sbp_free_request(struct sbp_target_request *req) | |
1453 | { | |
1454 | kfree(req->pg_tbl); | |
1455 | kfree(req->cmd_buf); | |
1456 | kfree(req); | |
1457 | } | |
1458 | ||
1459 | static void sbp_mgt_agent_process(struct work_struct *work) | |
1460 | { | |
1461 | struct sbp_management_agent *agent = | |
1462 | container_of(work, struct sbp_management_agent, work); | |
1463 | struct sbp_management_request *req = agent->request; | |
1464 | int ret; | |
1465 | int status_data_len = 0; | |
1466 | ||
1467 | /* fetch the ORB from the initiator */ | |
1468 | ret = sbp_run_transaction(req->card, TCODE_READ_BLOCK_REQUEST, | |
1469 | req->node_addr, req->generation, req->speed, | |
1470 | agent->orb_offset, &req->orb, sizeof(req->orb)); | |
1471 | if (ret != RCODE_COMPLETE) { | |
1472 | pr_debug("mgt_orb fetch failed: %x\n", ret); | |
1473 | goto out; | |
1474 | } | |
1475 | ||
1476 | pr_debug("mgt_orb ptr1:0x%llx ptr2:0x%llx misc:0x%x len:0x%x status_fifo:0x%llx\n", | |
1477 | sbp2_pointer_to_addr(&req->orb.ptr1), | |
1478 | sbp2_pointer_to_addr(&req->orb.ptr2), | |
1479 | be32_to_cpu(req->orb.misc), be32_to_cpu(req->orb.length), | |
1480 | sbp2_pointer_to_addr(&req->orb.status_fifo)); | |
1481 | ||
1482 | if (!ORB_NOTIFY(be32_to_cpu(req->orb.misc)) || | |
1483 | ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc)) != 0) { | |
1484 | pr_err("mgt_orb bad request\n"); | |
1485 | goto out; | |
1486 | } | |
1487 | ||
1488 | switch (MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))) { | |
1489 | case MANAGEMENT_ORB_FUNCTION_LOGIN: | |
1490 | sbp_management_request_login(agent, req, &status_data_len); | |
1491 | break; | |
1492 | ||
1493 | case MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS: | |
1494 | sbp_management_request_query_logins(agent, req, | |
1495 | &status_data_len); | |
1496 | break; | |
1497 | ||
1498 | case MANAGEMENT_ORB_FUNCTION_RECONNECT: | |
1499 | sbp_management_request_reconnect(agent, req, &status_data_len); | |
1500 | break; | |
1501 | ||
1502 | case MANAGEMENT_ORB_FUNCTION_SET_PASSWORD: | |
1503 | pr_notice("SET PASSWORD not implemented\n"); | |
1504 | ||
1505 | req->status.status = cpu_to_be32( | |
1506 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1507 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1508 | ||
1509 | break; | |
1510 | ||
1511 | case MANAGEMENT_ORB_FUNCTION_LOGOUT: | |
1512 | sbp_management_request_logout(agent, req, &status_data_len); | |
1513 | break; | |
1514 | ||
1515 | case MANAGEMENT_ORB_FUNCTION_ABORT_TASK: | |
1516 | pr_notice("ABORT TASK not implemented\n"); | |
1517 | ||
1518 | req->status.status = cpu_to_be32( | |
1519 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1520 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1521 | ||
1522 | break; | |
1523 | ||
1524 | case MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET: | |
1525 | pr_notice("ABORT TASK SET not implemented\n"); | |
1526 | ||
1527 | req->status.status = cpu_to_be32( | |
1528 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1529 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1530 | ||
1531 | break; | |
1532 | ||
1533 | case MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET: | |
1534 | pr_notice("LOGICAL UNIT RESET not implemented\n"); | |
1535 | ||
1536 | req->status.status = cpu_to_be32( | |
1537 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1538 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1539 | ||
1540 | break; | |
1541 | ||
1542 | case MANAGEMENT_ORB_FUNCTION_TARGET_RESET: | |
1543 | pr_notice("TARGET RESET not implemented\n"); | |
1544 | ||
1545 | req->status.status = cpu_to_be32( | |
1546 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1547 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1548 | ||
1549 | break; | |
1550 | ||
1551 | default: | |
1552 | pr_notice("unknown management function 0x%x\n", | |
1553 | MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))); | |
1554 | ||
1555 | req->status.status = cpu_to_be32( | |
1556 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1557 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1558 | ||
1559 | break; | |
1560 | } | |
1561 | ||
1562 | req->status.status |= cpu_to_be32( | |
1563 | STATUS_BLOCK_SRC(1) | /* Response to ORB, next_ORB absent */ | |
1564 | STATUS_BLOCK_LEN(DIV_ROUND_UP(status_data_len, 4) + 1) | | |
1565 | STATUS_BLOCK_ORB_OFFSET_HIGH(agent->orb_offset >> 32)); | |
1566 | req->status.orb_low = cpu_to_be32(agent->orb_offset); | |
1567 | ||
1568 | /* write the status block back to the initiator */ | |
1569 | ret = sbp_run_transaction(req->card, TCODE_WRITE_BLOCK_REQUEST, | |
1570 | req->node_addr, req->generation, req->speed, | |
1571 | sbp2_pointer_to_addr(&req->orb.status_fifo), | |
1572 | &req->status, 8 + status_data_len); | |
1573 | if (ret != RCODE_COMPLETE) { | |
1574 | pr_debug("mgt_orb status write failed: %x\n", ret); | |
1575 | goto out; | |
1576 | } | |
1577 | ||
1578 | out: | |
1579 | fw_card_put(req->card); | |
1580 | kfree(req); | |
1581 | ||
1582 | spin_lock_bh(&agent->lock); | |
1583 | agent->state = MANAGEMENT_AGENT_STATE_IDLE; | |
1584 | spin_unlock_bh(&agent->lock); | |
1585 | } | |
1586 | ||
1587 | static void sbp_mgt_agent_rw(struct fw_card *card, | |
1588 | struct fw_request *request, int tcode, int destination, int source, | |
1589 | int generation, unsigned long long offset, void *data, size_t length, | |
1590 | void *callback_data) | |
1591 | { | |
1592 | struct sbp_management_agent *agent = callback_data; | |
1593 | struct sbp2_pointer *ptr = data; | |
1594 | int rcode = RCODE_ADDRESS_ERROR; | |
1595 | ||
1596 | if (!agent->tport->enable) | |
1597 | goto out; | |
1598 | ||
1599 | if ((offset != agent->handler.offset) || (length != 8)) | |
1600 | goto out; | |
1601 | ||
1602 | if (tcode == TCODE_WRITE_BLOCK_REQUEST) { | |
1603 | struct sbp_management_request *req; | |
1604 | int prev_state; | |
1605 | ||
1606 | spin_lock_bh(&agent->lock); | |
1607 | prev_state = agent->state; | |
1608 | agent->state = MANAGEMENT_AGENT_STATE_BUSY; | |
1609 | spin_unlock_bh(&agent->lock); | |
1610 | ||
1611 | if (prev_state == MANAGEMENT_AGENT_STATE_BUSY) { | |
1612 | pr_notice("ignoring management request while busy\n"); | |
1613 | rcode = RCODE_CONFLICT_ERROR; | |
1614 | goto out; | |
1615 | } | |
1616 | ||
1617 | req = kzalloc(sizeof(*req), GFP_ATOMIC); | |
1618 | if (!req) { | |
1619 | rcode = RCODE_CONFLICT_ERROR; | |
1620 | goto out; | |
1621 | } | |
1622 | ||
1623 | req->card = fw_card_get(card); | |
1624 | req->generation = generation; | |
1625 | req->node_addr = source; | |
1626 | req->speed = fw_get_request_speed(request); | |
1627 | ||
1628 | agent->orb_offset = sbp2_pointer_to_addr(ptr); | |
1629 | agent->request = req; | |
1630 | ||
1631 | queue_work(system_unbound_wq, &agent->work); | |
1632 | rcode = RCODE_COMPLETE; | |
1633 | } else if (tcode == TCODE_READ_BLOCK_REQUEST) { | |
1634 | addr_to_sbp2_pointer(agent->orb_offset, ptr); | |
1635 | rcode = RCODE_COMPLETE; | |
1636 | } else { | |
1637 | rcode = RCODE_TYPE_ERROR; | |
1638 | } | |
1639 | ||
1640 | out: | |
1641 | fw_send_response(card, request, rcode); | |
1642 | } | |
1643 | ||
1644 | static struct sbp_management_agent *sbp_management_agent_register( | |
1645 | struct sbp_tport *tport) | |
1646 | { | |
1647 | int ret; | |
1648 | struct sbp_management_agent *agent; | |
1649 | ||
1650 | agent = kmalloc(sizeof(*agent), GFP_KERNEL); | |
1651 | if (!agent) | |
1652 | return ERR_PTR(-ENOMEM); | |
1653 | ||
1654 | spin_lock_init(&agent->lock); | |
1655 | agent->tport = tport; | |
1656 | agent->handler.length = 0x08; | |
1657 | agent->handler.address_callback = sbp_mgt_agent_rw; | |
1658 | agent->handler.callback_data = agent; | |
1659 | agent->state = MANAGEMENT_AGENT_STATE_IDLE; | |
1660 | INIT_WORK(&agent->work, sbp_mgt_agent_process); | |
1661 | agent->orb_offset = 0; | |
1662 | agent->request = NULL; | |
1663 | ||
1664 | ret = fw_core_add_address_handler(&agent->handler, | |
1665 | &sbp_register_region); | |
1666 | if (ret < 0) { | |
1667 | kfree(agent); | |
1668 | return ERR_PTR(ret); | |
1669 | } | |
1670 | ||
1671 | return agent; | |
1672 | } | |
1673 | ||
1674 | static void sbp_management_agent_unregister(struct sbp_management_agent *agent) | |
1675 | { | |
1676 | fw_core_remove_address_handler(&agent->handler); | |
1677 | cancel_work_sync(&agent->work); | |
1678 | kfree(agent); | |
1679 | } | |
1680 | ||
1681 | static int sbp_check_true(struct se_portal_group *se_tpg) | |
1682 | { | |
1683 | return 1; | |
1684 | } | |
1685 | ||
1686 | static int sbp_check_false(struct se_portal_group *se_tpg) | |
1687 | { | |
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | static char *sbp_get_fabric_name(void) | |
1692 | { | |
1693 | return "sbp"; | |
1694 | } | |
1695 | ||
1696 | static char *sbp_get_fabric_wwn(struct se_portal_group *se_tpg) | |
1697 | { | |
1698 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1699 | struct sbp_tport *tport = tpg->tport; | |
1700 | ||
1701 | return &tport->tport_name[0]; | |
1702 | } | |
1703 | ||
1704 | static u16 sbp_get_tag(struct se_portal_group *se_tpg) | |
1705 | { | |
1706 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1707 | return tpg->tport_tpgt; | |
1708 | } | |
1709 | ||
1710 | static u32 sbp_get_default_depth(struct se_portal_group *se_tpg) | |
1711 | { | |
1712 | return 1; | |
1713 | } | |
1714 | ||
1715 | static struct se_node_acl *sbp_alloc_fabric_acl(struct se_portal_group *se_tpg) | |
1716 | { | |
1717 | struct sbp_nacl *nacl; | |
1718 | ||
1719 | nacl = kzalloc(sizeof(struct sbp_nacl), GFP_KERNEL); | |
1720 | if (!nacl) { | |
8a168ca7 | 1721 | pr_err("Unable to allocate struct sbp_nacl\n"); |
a511ce33 CB |
1722 | return NULL; |
1723 | } | |
1724 | ||
1725 | return &nacl->se_node_acl; | |
1726 | } | |
1727 | ||
1728 | static void sbp_release_fabric_acl( | |
1729 | struct se_portal_group *se_tpg, | |
1730 | struct se_node_acl *se_nacl) | |
1731 | { | |
1732 | struct sbp_nacl *nacl = | |
1733 | container_of(se_nacl, struct sbp_nacl, se_node_acl); | |
1734 | kfree(nacl); | |
1735 | } | |
1736 | ||
1737 | static u32 sbp_tpg_get_inst_index(struct se_portal_group *se_tpg) | |
1738 | { | |
1739 | return 1; | |
1740 | } | |
1741 | ||
1742 | static void sbp_release_cmd(struct se_cmd *se_cmd) | |
1743 | { | |
1744 | struct sbp_target_request *req = container_of(se_cmd, | |
1745 | struct sbp_target_request, se_cmd); | |
1746 | ||
1747 | sbp_free_request(req); | |
1748 | } | |
1749 | ||
1750 | static int sbp_shutdown_session(struct se_session *se_sess) | |
1751 | { | |
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | static void sbp_close_session(struct se_session *se_sess) | |
1756 | { | |
1757 | return; | |
1758 | } | |
1759 | ||
1760 | static u32 sbp_sess_get_index(struct se_session *se_sess) | |
1761 | { | |
1762 | return 0; | |
1763 | } | |
1764 | ||
1765 | static int sbp_write_pending(struct se_cmd *se_cmd) | |
1766 | { | |
1767 | struct sbp_target_request *req = container_of(se_cmd, | |
1768 | struct sbp_target_request, se_cmd); | |
1769 | int ret; | |
1770 | ||
1771 | ret = sbp_rw_data(req); | |
1772 | if (ret) { | |
1773 | req->status.status |= cpu_to_be32( | |
1774 | STATUS_BLOCK_RESP( | |
1775 | STATUS_RESP_TRANSPORT_FAILURE) | | |
1776 | STATUS_BLOCK_DEAD(0) | | |
1777 | STATUS_BLOCK_LEN(1) | | |
1778 | STATUS_BLOCK_SBP_STATUS( | |
1779 | SBP_STATUS_UNSPECIFIED_ERROR)); | |
1780 | sbp_send_status(req); | |
1781 | return ret; | |
1782 | } | |
1783 | ||
70baf0ab | 1784 | target_execute_cmd(se_cmd); |
a511ce33 CB |
1785 | return 0; |
1786 | } | |
1787 | ||
1788 | static int sbp_write_pending_status(struct se_cmd *se_cmd) | |
1789 | { | |
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | static void sbp_set_default_node_attrs(struct se_node_acl *nacl) | |
1794 | { | |
1795 | return; | |
1796 | } | |
1797 | ||
1798 | static u32 sbp_get_task_tag(struct se_cmd *se_cmd) | |
1799 | { | |
1800 | struct sbp_target_request *req = container_of(se_cmd, | |
1801 | struct sbp_target_request, se_cmd); | |
1802 | ||
1803 | /* only used for printk until we do TMRs */ | |
1804 | return (u32)req->orb_pointer; | |
1805 | } | |
1806 | ||
1807 | static int sbp_get_cmd_state(struct se_cmd *se_cmd) | |
1808 | { | |
1809 | return 0; | |
1810 | } | |
1811 | ||
1812 | static int sbp_queue_data_in(struct se_cmd *se_cmd) | |
1813 | { | |
1814 | struct sbp_target_request *req = container_of(se_cmd, | |
1815 | struct sbp_target_request, se_cmd); | |
1816 | int ret; | |
1817 | ||
1818 | ret = sbp_rw_data(req); | |
1819 | if (ret) { | |
1820 | req->status.status |= cpu_to_be32( | |
1821 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1822 | STATUS_BLOCK_DEAD(0) | | |
1823 | STATUS_BLOCK_LEN(1) | | |
1824 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1825 | sbp_send_status(req); | |
1826 | return ret; | |
1827 | } | |
1828 | ||
1829 | return sbp_send_sense(req); | |
1830 | } | |
1831 | ||
1832 | /* | |
1833 | * Called after command (no data transfer) or after the write (to device) | |
1834 | * operation is completed | |
1835 | */ | |
1836 | static int sbp_queue_status(struct se_cmd *se_cmd) | |
1837 | { | |
1838 | struct sbp_target_request *req = container_of(se_cmd, | |
1839 | struct sbp_target_request, se_cmd); | |
1840 | ||
1841 | return sbp_send_sense(req); | |
1842 | } | |
1843 | ||
b79fafac | 1844 | static void sbp_queue_tm_rsp(struct se_cmd *se_cmd) |
a511ce33 | 1845 | { |
a511ce33 CB |
1846 | } |
1847 | ||
131e6abc NB |
1848 | static void sbp_aborted_task(struct se_cmd *se_cmd) |
1849 | { | |
1850 | return; | |
1851 | } | |
1852 | ||
a511ce33 CB |
1853 | static int sbp_check_stop_free(struct se_cmd *se_cmd) |
1854 | { | |
1855 | struct sbp_target_request *req = container_of(se_cmd, | |
1856 | struct sbp_target_request, se_cmd); | |
1857 | ||
1858 | transport_generic_free_cmd(&req->se_cmd, 0); | |
1859 | return 1; | |
1860 | } | |
1861 | ||
1862 | /* | |
1863 | * Handlers for Serial Bus Protocol 2/3 (SBP-2 / SBP-3) | |
1864 | */ | |
1865 | static u8 sbp_get_fabric_proto_ident(struct se_portal_group *se_tpg) | |
1866 | { | |
1867 | /* | |
1868 | * Return a IEEE 1394 SCSI Protocol identifier for loopback operations | |
1869 | * This is defined in section 7.5.1 Table 362 in spc4r17 | |
1870 | */ | |
1871 | return SCSI_PROTOCOL_SBP; | |
1872 | } | |
1873 | ||
1874 | static u32 sbp_get_pr_transport_id( | |
1875 | struct se_portal_group *se_tpg, | |
1876 | struct se_node_acl *se_nacl, | |
1877 | struct t10_pr_registration *pr_reg, | |
1878 | int *format_code, | |
1879 | unsigned char *buf) | |
1880 | { | |
1881 | int ret; | |
1882 | ||
1883 | /* | |
1884 | * Set PROTOCOL IDENTIFIER to 3h for SBP | |
1885 | */ | |
1886 | buf[0] = SCSI_PROTOCOL_SBP; | |
1887 | /* | |
1888 | * From spc4r17, 7.5.4.4 TransportID for initiator ports using SCSI | |
1889 | * over IEEE 1394 | |
1890 | */ | |
1891 | ret = hex2bin(&buf[8], se_nacl->initiatorname, 8); | |
1892 | if (ret < 0) | |
1893 | pr_debug("sbp transport_id: invalid hex string\n"); | |
1894 | ||
1895 | /* | |
1896 | * The IEEE 1394 Transport ID is a hardcoded 24-byte length | |
1897 | */ | |
1898 | return 24; | |
1899 | } | |
1900 | ||
1901 | static u32 sbp_get_pr_transport_id_len( | |
1902 | struct se_portal_group *se_tpg, | |
1903 | struct se_node_acl *se_nacl, | |
1904 | struct t10_pr_registration *pr_reg, | |
1905 | int *format_code) | |
1906 | { | |
1907 | *format_code = 0; | |
1908 | /* | |
1909 | * From spc4r17, 7.5.4.4 TransportID for initiator ports using SCSI | |
1910 | * over IEEE 1394 | |
1911 | * | |
1912 | * The SBP Transport ID is a hardcoded 24-byte length | |
1913 | */ | |
1914 | return 24; | |
1915 | } | |
1916 | ||
1917 | /* | |
1918 | * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above | |
1919 | * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. | |
1920 | */ | |
1921 | static char *sbp_parse_pr_out_transport_id( | |
1922 | struct se_portal_group *se_tpg, | |
1923 | const char *buf, | |
1924 | u32 *out_tid_len, | |
1925 | char **port_nexus_ptr) | |
1926 | { | |
1927 | /* | |
1928 | * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.4 TransportID | |
1929 | * for initiator ports using SCSI over SBP Serial SCSI Protocol | |
1930 | * | |
1931 | * The TransportID for a IEEE 1394 Initiator Port is of fixed size of | |
1932 | * 24 bytes, and IEEE 1394 does not contain a I_T nexus identifier, | |
1933 | * so we return the **port_nexus_ptr set to NULL. | |
1934 | */ | |
1935 | *port_nexus_ptr = NULL; | |
1936 | *out_tid_len = 24; | |
1937 | ||
1938 | return (char *)&buf[8]; | |
1939 | } | |
1940 | ||
1941 | static int sbp_count_se_tpg_luns(struct se_portal_group *tpg) | |
1942 | { | |
1943 | int i, count = 0; | |
1944 | ||
1945 | spin_lock(&tpg->tpg_lun_lock); | |
1946 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
1947 | struct se_lun *se_lun = tpg->tpg_lun_list[i]; | |
1948 | ||
1949 | if (se_lun->lun_status == TRANSPORT_LUN_STATUS_FREE) | |
1950 | continue; | |
1951 | ||
1952 | count++; | |
1953 | } | |
1954 | spin_unlock(&tpg->tpg_lun_lock); | |
1955 | ||
1956 | return count; | |
1957 | } | |
1958 | ||
1959 | static int sbp_update_unit_directory(struct sbp_tport *tport) | |
1960 | { | |
1961 | int num_luns, num_entries, idx = 0, mgt_agt_addr, ret, i; | |
1962 | u32 *data; | |
1963 | ||
1964 | if (tport->unit_directory.data) { | |
1965 | fw_core_remove_descriptor(&tport->unit_directory); | |
1966 | kfree(tport->unit_directory.data); | |
1967 | tport->unit_directory.data = NULL; | |
1968 | } | |
1969 | ||
1970 | if (!tport->enable || !tport->tpg) | |
1971 | return 0; | |
1972 | ||
1973 | num_luns = sbp_count_se_tpg_luns(&tport->tpg->se_tpg); | |
1974 | ||
1975 | /* | |
1976 | * Number of entries in the final unit directory: | |
1977 | * - all of those in the template | |
1978 | * - management_agent | |
1979 | * - unit_characteristics | |
1980 | * - reconnect_timeout | |
1981 | * - unit unique ID | |
1982 | * - one for each LUN | |
1983 | * | |
1984 | * MUST NOT include leaf or sub-directory entries | |
1985 | */ | |
1986 | num_entries = ARRAY_SIZE(sbp_unit_directory_template) + 4 + num_luns; | |
1987 | ||
1988 | if (tport->directory_id != -1) | |
1989 | num_entries++; | |
1990 | ||
1991 | /* allocate num_entries + 4 for the header and unique ID leaf */ | |
1992 | data = kcalloc((num_entries + 4), sizeof(u32), GFP_KERNEL); | |
1993 | if (!data) | |
1994 | return -ENOMEM; | |
1995 | ||
1996 | /* directory_length */ | |
1997 | data[idx++] = num_entries << 16; | |
1998 | ||
1999 | /* directory_id */ | |
2000 | if (tport->directory_id != -1) | |
2001 | data[idx++] = (CSR_DIRECTORY_ID << 24) | tport->directory_id; | |
2002 | ||
2003 | /* unit directory template */ | |
2004 | memcpy(&data[idx], sbp_unit_directory_template, | |
2005 | sizeof(sbp_unit_directory_template)); | |
2006 | idx += ARRAY_SIZE(sbp_unit_directory_template); | |
2007 | ||
2008 | /* management_agent */ | |
2009 | mgt_agt_addr = (tport->mgt_agt->handler.offset - CSR_REGISTER_BASE) / 4; | |
2010 | data[idx++] = 0x54000000 | (mgt_agt_addr & 0x00ffffff); | |
2011 | ||
2012 | /* unit_characteristics */ | |
2013 | data[idx++] = 0x3a000000 | | |
2014 | (((tport->mgt_orb_timeout * 2) << 8) & 0xff00) | | |
2015 | SBP_ORB_FETCH_SIZE; | |
2016 | ||
2017 | /* reconnect_timeout */ | |
2018 | data[idx++] = 0x3d000000 | (tport->max_reconnect_timeout & 0xffff); | |
2019 | ||
2020 | /* unit unique ID (leaf is just after LUNs) */ | |
2021 | data[idx++] = 0x8d000000 | (num_luns + 1); | |
2022 | ||
2023 | spin_lock(&tport->tpg->se_tpg.tpg_lun_lock); | |
2024 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
2025 | struct se_lun *se_lun = tport->tpg->se_tpg.tpg_lun_list[i]; | |
2026 | struct se_device *dev; | |
2027 | int type; | |
2028 | ||
2029 | if (se_lun->lun_status == TRANSPORT_LUN_STATUS_FREE) | |
2030 | continue; | |
2031 | ||
2032 | spin_unlock(&tport->tpg->se_tpg.tpg_lun_lock); | |
2033 | ||
2034 | dev = se_lun->lun_se_dev; | |
2035 | type = dev->transport->get_device_type(dev); | |
2036 | ||
2037 | /* logical_unit_number */ | |
2038 | data[idx++] = 0x14000000 | | |
2039 | ((type << 16) & 0x1f0000) | | |
2040 | (se_lun->unpacked_lun & 0xffff); | |
2041 | ||
2042 | spin_lock(&tport->tpg->se_tpg.tpg_lun_lock); | |
2043 | } | |
2044 | spin_unlock(&tport->tpg->se_tpg.tpg_lun_lock); | |
2045 | ||
2046 | /* unit unique ID leaf */ | |
2047 | data[idx++] = 2 << 16; | |
2048 | data[idx++] = tport->guid >> 32; | |
2049 | data[idx++] = tport->guid; | |
2050 | ||
2051 | tport->unit_directory.length = idx; | |
2052 | tport->unit_directory.key = (CSR_DIRECTORY | CSR_UNIT) << 24; | |
2053 | tport->unit_directory.data = data; | |
2054 | ||
2055 | ret = fw_core_add_descriptor(&tport->unit_directory); | |
2056 | if (ret < 0) { | |
2057 | kfree(tport->unit_directory.data); | |
2058 | tport->unit_directory.data = NULL; | |
2059 | } | |
2060 | ||
2061 | return ret; | |
2062 | } | |
2063 | ||
343d475d | 2064 | static ssize_t sbp_parse_wwn(const char *name, u64 *wwn) |
a511ce33 CB |
2065 | { |
2066 | const char *cp; | |
2067 | char c, nibble; | |
2068 | int pos = 0, err; | |
2069 | ||
2070 | *wwn = 0; | |
2071 | for (cp = name; cp < &name[SBP_NAMELEN - 1]; cp++) { | |
2072 | c = *cp; | |
2073 | if (c == '\n' && cp[1] == '\0') | |
2074 | continue; | |
2075 | if (c == '\0') { | |
2076 | err = 2; | |
2077 | if (pos != 16) | |
2078 | goto fail; | |
2079 | return cp - name; | |
2080 | } | |
2081 | err = 3; | |
2082 | if (isdigit(c)) | |
2083 | nibble = c - '0'; | |
343d475d | 2084 | else if (isxdigit(c)) |
a511ce33 CB |
2085 | nibble = tolower(c) - 'a' + 10; |
2086 | else | |
2087 | goto fail; | |
2088 | *wwn = (*wwn << 4) | nibble; | |
2089 | pos++; | |
2090 | } | |
2091 | err = 4; | |
2092 | fail: | |
2093 | printk(KERN_INFO "err %u len %zu pos %u\n", | |
2094 | err, cp - name, pos); | |
2095 | return -1; | |
2096 | } | |
2097 | ||
2098 | static ssize_t sbp_format_wwn(char *buf, size_t len, u64 wwn) | |
2099 | { | |
2100 | return snprintf(buf, len, "%016llx", wwn); | |
2101 | } | |
2102 | ||
2103 | static struct se_node_acl *sbp_make_nodeacl( | |
2104 | struct se_portal_group *se_tpg, | |
2105 | struct config_group *group, | |
2106 | const char *name) | |
2107 | { | |
2108 | struct se_node_acl *se_nacl, *se_nacl_new; | |
2109 | struct sbp_nacl *nacl; | |
2110 | u64 guid = 0; | |
2111 | u32 nexus_depth = 1; | |
2112 | ||
343d475d | 2113 | if (sbp_parse_wwn(name, &guid) < 0) |
a511ce33 CB |
2114 | return ERR_PTR(-EINVAL); |
2115 | ||
2116 | se_nacl_new = sbp_alloc_fabric_acl(se_tpg); | |
2117 | if (!se_nacl_new) | |
2118 | return ERR_PTR(-ENOMEM); | |
2119 | ||
2120 | /* | |
2121 | * se_nacl_new may be released by core_tpg_add_initiator_node_acl() | |
2122 | * when converting a NodeACL from demo mode -> explict | |
2123 | */ | |
2124 | se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new, | |
2125 | name, nexus_depth); | |
2126 | if (IS_ERR(se_nacl)) { | |
2127 | sbp_release_fabric_acl(se_tpg, se_nacl_new); | |
2128 | return se_nacl; | |
2129 | } | |
2130 | ||
2131 | nacl = container_of(se_nacl, struct sbp_nacl, se_node_acl); | |
2132 | nacl->guid = guid; | |
2133 | sbp_format_wwn(nacl->iport_name, SBP_NAMELEN, guid); | |
2134 | ||
2135 | return se_nacl; | |
2136 | } | |
2137 | ||
2138 | static void sbp_drop_nodeacl(struct se_node_acl *se_acl) | |
2139 | { | |
2140 | struct sbp_nacl *nacl = | |
2141 | container_of(se_acl, struct sbp_nacl, se_node_acl); | |
2142 | ||
2143 | core_tpg_del_initiator_node_acl(se_acl->se_tpg, se_acl, 1); | |
2144 | kfree(nacl); | |
2145 | } | |
2146 | ||
2147 | static int sbp_post_link_lun( | |
2148 | struct se_portal_group *se_tpg, | |
2149 | struct se_lun *se_lun) | |
2150 | { | |
2151 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2152 | ||
2153 | return sbp_update_unit_directory(tpg->tport); | |
2154 | } | |
2155 | ||
2156 | static void sbp_pre_unlink_lun( | |
2157 | struct se_portal_group *se_tpg, | |
2158 | struct se_lun *se_lun) | |
2159 | { | |
2160 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2161 | struct sbp_tport *tport = tpg->tport; | |
2162 | int ret; | |
2163 | ||
2164 | if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) | |
2165 | tport->enable = 0; | |
2166 | ||
2167 | ret = sbp_update_unit_directory(tport); | |
2168 | if (ret < 0) | |
2169 | pr_err("unlink LUN: failed to update unit directory\n"); | |
2170 | } | |
2171 | ||
2172 | static struct se_portal_group *sbp_make_tpg( | |
2173 | struct se_wwn *wwn, | |
2174 | struct config_group *group, | |
2175 | const char *name) | |
2176 | { | |
2177 | struct sbp_tport *tport = | |
2178 | container_of(wwn, struct sbp_tport, tport_wwn); | |
2179 | ||
2180 | struct sbp_tpg *tpg; | |
2181 | unsigned long tpgt; | |
2182 | int ret; | |
2183 | ||
2184 | if (strstr(name, "tpgt_") != name) | |
2185 | return ERR_PTR(-EINVAL); | |
2186 | if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX) | |
2187 | return ERR_PTR(-EINVAL); | |
2188 | ||
2189 | if (tport->tpg) { | |
2190 | pr_err("Only one TPG per Unit is possible.\n"); | |
2191 | return ERR_PTR(-EBUSY); | |
2192 | } | |
2193 | ||
2194 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); | |
2195 | if (!tpg) { | |
2196 | pr_err("Unable to allocate struct sbp_tpg\n"); | |
2197 | return ERR_PTR(-ENOMEM); | |
2198 | } | |
2199 | ||
2200 | tpg->tport = tport; | |
2201 | tpg->tport_tpgt = tpgt; | |
2202 | tport->tpg = tpg; | |
2203 | ||
2204 | /* default attribute values */ | |
2205 | tport->enable = 0; | |
2206 | tport->directory_id = -1; | |
2207 | tport->mgt_orb_timeout = 15; | |
2208 | tport->max_reconnect_timeout = 5; | |
2209 | tport->max_logins_per_lun = 1; | |
2210 | ||
2211 | tport->mgt_agt = sbp_management_agent_register(tport); | |
2212 | if (IS_ERR(tport->mgt_agt)) { | |
2213 | ret = PTR_ERR(tport->mgt_agt); | |
e1fe2060 | 2214 | goto out_free_tpg; |
a511ce33 CB |
2215 | } |
2216 | ||
9ac8928e | 2217 | ret = core_tpg_register(&sbp_ops, wwn, &tpg->se_tpg, tpg, |
a511ce33 | 2218 | TRANSPORT_TPG_TYPE_NORMAL); |
e1fe2060 CB |
2219 | if (ret < 0) |
2220 | goto out_unreg_mgt_agt; | |
a511ce33 CB |
2221 | |
2222 | return &tpg->se_tpg; | |
e1fe2060 CB |
2223 | |
2224 | out_unreg_mgt_agt: | |
2225 | sbp_management_agent_unregister(tport->mgt_agt); | |
2226 | out_free_tpg: | |
2227 | tport->tpg = NULL; | |
2228 | kfree(tpg); | |
2229 | return ERR_PTR(ret); | |
a511ce33 CB |
2230 | } |
2231 | ||
2232 | static void sbp_drop_tpg(struct se_portal_group *se_tpg) | |
2233 | { | |
2234 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2235 | struct sbp_tport *tport = tpg->tport; | |
2236 | ||
2237 | core_tpg_deregister(se_tpg); | |
2238 | sbp_management_agent_unregister(tport->mgt_agt); | |
2239 | tport->tpg = NULL; | |
2240 | kfree(tpg); | |
2241 | } | |
2242 | ||
2243 | static struct se_wwn *sbp_make_tport( | |
2244 | struct target_fabric_configfs *tf, | |
2245 | struct config_group *group, | |
2246 | const char *name) | |
2247 | { | |
2248 | struct sbp_tport *tport; | |
2249 | u64 guid = 0; | |
2250 | ||
343d475d | 2251 | if (sbp_parse_wwn(name, &guid) < 0) |
a511ce33 CB |
2252 | return ERR_PTR(-EINVAL); |
2253 | ||
2254 | tport = kzalloc(sizeof(*tport), GFP_KERNEL); | |
2255 | if (!tport) { | |
2256 | pr_err("Unable to allocate struct sbp_tport\n"); | |
2257 | return ERR_PTR(-ENOMEM); | |
2258 | } | |
2259 | ||
2260 | tport->guid = guid; | |
2261 | sbp_format_wwn(tport->tport_name, SBP_NAMELEN, guid); | |
2262 | ||
2263 | return &tport->tport_wwn; | |
2264 | } | |
2265 | ||
2266 | static void sbp_drop_tport(struct se_wwn *wwn) | |
2267 | { | |
2268 | struct sbp_tport *tport = | |
2269 | container_of(wwn, struct sbp_tport, tport_wwn); | |
2270 | ||
2271 | kfree(tport); | |
2272 | } | |
2273 | ||
2274 | static ssize_t sbp_wwn_show_attr_version( | |
2275 | struct target_fabric_configfs *tf, | |
2276 | char *page) | |
2277 | { | |
2278 | return sprintf(page, "FireWire SBP fabric module %s\n", SBP_VERSION); | |
2279 | } | |
2280 | ||
2281 | TF_WWN_ATTR_RO(sbp, version); | |
2282 | ||
2283 | static struct configfs_attribute *sbp_wwn_attrs[] = { | |
2284 | &sbp_wwn_version.attr, | |
2285 | NULL, | |
2286 | }; | |
2287 | ||
2288 | static ssize_t sbp_tpg_show_directory_id( | |
2289 | struct se_portal_group *se_tpg, | |
2290 | char *page) | |
2291 | { | |
2292 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2293 | struct sbp_tport *tport = tpg->tport; | |
2294 | ||
2295 | if (tport->directory_id == -1) | |
2296 | return sprintf(page, "implicit\n"); | |
2297 | else | |
2298 | return sprintf(page, "%06x\n", tport->directory_id); | |
2299 | } | |
2300 | ||
2301 | static ssize_t sbp_tpg_store_directory_id( | |
2302 | struct se_portal_group *se_tpg, | |
2303 | const char *page, | |
2304 | size_t count) | |
2305 | { | |
2306 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2307 | struct sbp_tport *tport = tpg->tport; | |
2308 | unsigned long val; | |
2309 | ||
2310 | if (tport->enable) { | |
2311 | pr_err("Cannot change the directory_id on an active target.\n"); | |
2312 | return -EBUSY; | |
2313 | } | |
2314 | ||
2315 | if (strstr(page, "implicit") == page) { | |
2316 | tport->directory_id = -1; | |
2317 | } else { | |
2318 | if (kstrtoul(page, 16, &val) < 0) | |
2319 | return -EINVAL; | |
2320 | if (val > 0xffffff) | |
2321 | return -EINVAL; | |
2322 | ||
2323 | tport->directory_id = val; | |
2324 | } | |
2325 | ||
2326 | return count; | |
2327 | } | |
2328 | ||
2329 | static ssize_t sbp_tpg_show_enable( | |
2330 | struct se_portal_group *se_tpg, | |
2331 | char *page) | |
2332 | { | |
2333 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2334 | struct sbp_tport *tport = tpg->tport; | |
2335 | return sprintf(page, "%d\n", tport->enable); | |
2336 | } | |
2337 | ||
2338 | static ssize_t sbp_tpg_store_enable( | |
2339 | struct se_portal_group *se_tpg, | |
2340 | const char *page, | |
2341 | size_t count) | |
2342 | { | |
2343 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2344 | struct sbp_tport *tport = tpg->tport; | |
2345 | unsigned long val; | |
2346 | int ret; | |
2347 | ||
2348 | if (kstrtoul(page, 0, &val) < 0) | |
2349 | return -EINVAL; | |
2350 | if ((val != 0) && (val != 1)) | |
2351 | return -EINVAL; | |
2352 | ||
2353 | if (tport->enable == val) | |
2354 | return count; | |
2355 | ||
2356 | if (val) { | |
2357 | if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) { | |
2358 | pr_err("Cannot enable a target with no LUNs!\n"); | |
2359 | return -EINVAL; | |
2360 | } | |
2361 | } else { | |
2362 | /* XXX: force-shutdown sessions instead? */ | |
2363 | spin_lock_bh(&se_tpg->session_lock); | |
2364 | if (!list_empty(&se_tpg->tpg_sess_list)) { | |
2365 | spin_unlock_bh(&se_tpg->session_lock); | |
2366 | return -EBUSY; | |
2367 | } | |
2368 | spin_unlock_bh(&se_tpg->session_lock); | |
2369 | } | |
2370 | ||
2371 | tport->enable = val; | |
2372 | ||
2373 | ret = sbp_update_unit_directory(tport); | |
2374 | if (ret < 0) { | |
2375 | pr_err("Could not update Config ROM\n"); | |
2376 | return ret; | |
2377 | } | |
2378 | ||
2379 | return count; | |
2380 | } | |
2381 | ||
2382 | TF_TPG_BASE_ATTR(sbp, directory_id, S_IRUGO | S_IWUSR); | |
2383 | TF_TPG_BASE_ATTR(sbp, enable, S_IRUGO | S_IWUSR); | |
2384 | ||
2385 | static struct configfs_attribute *sbp_tpg_base_attrs[] = { | |
2386 | &sbp_tpg_directory_id.attr, | |
2387 | &sbp_tpg_enable.attr, | |
2388 | NULL, | |
2389 | }; | |
2390 | ||
2391 | static ssize_t sbp_tpg_attrib_show_mgt_orb_timeout( | |
2392 | struct se_portal_group *se_tpg, | |
2393 | char *page) | |
2394 | { | |
2395 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2396 | struct sbp_tport *tport = tpg->tport; | |
2397 | return sprintf(page, "%d\n", tport->mgt_orb_timeout); | |
2398 | } | |
2399 | ||
2400 | static ssize_t sbp_tpg_attrib_store_mgt_orb_timeout( | |
2401 | struct se_portal_group *se_tpg, | |
2402 | const char *page, | |
2403 | size_t count) | |
2404 | { | |
2405 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2406 | struct sbp_tport *tport = tpg->tport; | |
2407 | unsigned long val; | |
2408 | int ret; | |
2409 | ||
2410 | if (kstrtoul(page, 0, &val) < 0) | |
2411 | return -EINVAL; | |
2412 | if ((val < 1) || (val > 127)) | |
2413 | return -EINVAL; | |
2414 | ||
2415 | if (tport->mgt_orb_timeout == val) | |
2416 | return count; | |
2417 | ||
2418 | tport->mgt_orb_timeout = val; | |
2419 | ||
2420 | ret = sbp_update_unit_directory(tport); | |
2421 | if (ret < 0) | |
2422 | return ret; | |
2423 | ||
2424 | return count; | |
2425 | } | |
2426 | ||
2427 | static ssize_t sbp_tpg_attrib_show_max_reconnect_timeout( | |
2428 | struct se_portal_group *se_tpg, | |
2429 | char *page) | |
2430 | { | |
2431 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2432 | struct sbp_tport *tport = tpg->tport; | |
2433 | return sprintf(page, "%d\n", tport->max_reconnect_timeout); | |
2434 | } | |
2435 | ||
2436 | static ssize_t sbp_tpg_attrib_store_max_reconnect_timeout( | |
2437 | struct se_portal_group *se_tpg, | |
2438 | const char *page, | |
2439 | size_t count) | |
2440 | { | |
2441 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2442 | struct sbp_tport *tport = tpg->tport; | |
2443 | unsigned long val; | |
2444 | int ret; | |
2445 | ||
2446 | if (kstrtoul(page, 0, &val) < 0) | |
2447 | return -EINVAL; | |
2448 | if ((val < 1) || (val > 32767)) | |
2449 | return -EINVAL; | |
2450 | ||
2451 | if (tport->max_reconnect_timeout == val) | |
2452 | return count; | |
2453 | ||
2454 | tport->max_reconnect_timeout = val; | |
2455 | ||
2456 | ret = sbp_update_unit_directory(tport); | |
2457 | if (ret < 0) | |
2458 | return ret; | |
2459 | ||
2460 | return count; | |
2461 | } | |
2462 | ||
2463 | static ssize_t sbp_tpg_attrib_show_max_logins_per_lun( | |
2464 | struct se_portal_group *se_tpg, | |
2465 | char *page) | |
2466 | { | |
2467 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2468 | struct sbp_tport *tport = tpg->tport; | |
2469 | return sprintf(page, "%d\n", tport->max_logins_per_lun); | |
2470 | } | |
2471 | ||
2472 | static ssize_t sbp_tpg_attrib_store_max_logins_per_lun( | |
2473 | struct se_portal_group *se_tpg, | |
2474 | const char *page, | |
2475 | size_t count) | |
2476 | { | |
2477 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2478 | struct sbp_tport *tport = tpg->tport; | |
2479 | unsigned long val; | |
2480 | ||
2481 | if (kstrtoul(page, 0, &val) < 0) | |
2482 | return -EINVAL; | |
2483 | if ((val < 1) || (val > 127)) | |
2484 | return -EINVAL; | |
2485 | ||
2486 | /* XXX: also check against current count? */ | |
2487 | ||
2488 | tport->max_logins_per_lun = val; | |
2489 | ||
2490 | return count; | |
2491 | } | |
2492 | ||
2493 | TF_TPG_ATTRIB_ATTR(sbp, mgt_orb_timeout, S_IRUGO | S_IWUSR); | |
2494 | TF_TPG_ATTRIB_ATTR(sbp, max_reconnect_timeout, S_IRUGO | S_IWUSR); | |
2495 | TF_TPG_ATTRIB_ATTR(sbp, max_logins_per_lun, S_IRUGO | S_IWUSR); | |
2496 | ||
2497 | static struct configfs_attribute *sbp_tpg_attrib_attrs[] = { | |
2498 | &sbp_tpg_attrib_mgt_orb_timeout.attr, | |
2499 | &sbp_tpg_attrib_max_reconnect_timeout.attr, | |
2500 | &sbp_tpg_attrib_max_logins_per_lun.attr, | |
2501 | NULL, | |
2502 | }; | |
2503 | ||
9ac8928e CH |
2504 | static const struct target_core_fabric_ops sbp_ops = { |
2505 | .module = THIS_MODULE, | |
2506 | .name = "sbp", | |
a511ce33 CB |
2507 | .get_fabric_name = sbp_get_fabric_name, |
2508 | .get_fabric_proto_ident = sbp_get_fabric_proto_ident, | |
2509 | .tpg_get_wwn = sbp_get_fabric_wwn, | |
2510 | .tpg_get_tag = sbp_get_tag, | |
2511 | .tpg_get_default_depth = sbp_get_default_depth, | |
2512 | .tpg_get_pr_transport_id = sbp_get_pr_transport_id, | |
2513 | .tpg_get_pr_transport_id_len = sbp_get_pr_transport_id_len, | |
2514 | .tpg_parse_pr_out_transport_id = sbp_parse_pr_out_transport_id, | |
2515 | .tpg_check_demo_mode = sbp_check_true, | |
2516 | .tpg_check_demo_mode_cache = sbp_check_true, | |
2517 | .tpg_check_demo_mode_write_protect = sbp_check_false, | |
2518 | .tpg_check_prod_mode_write_protect = sbp_check_false, | |
2519 | .tpg_alloc_fabric_acl = sbp_alloc_fabric_acl, | |
2520 | .tpg_release_fabric_acl = sbp_release_fabric_acl, | |
2521 | .tpg_get_inst_index = sbp_tpg_get_inst_index, | |
2522 | .release_cmd = sbp_release_cmd, | |
2523 | .shutdown_session = sbp_shutdown_session, | |
2524 | .close_session = sbp_close_session, | |
2525 | .sess_get_index = sbp_sess_get_index, | |
2526 | .write_pending = sbp_write_pending, | |
2527 | .write_pending_status = sbp_write_pending_status, | |
2528 | .set_default_node_attributes = sbp_set_default_node_attrs, | |
2529 | .get_task_tag = sbp_get_task_tag, | |
2530 | .get_cmd_state = sbp_get_cmd_state, | |
2531 | .queue_data_in = sbp_queue_data_in, | |
2532 | .queue_status = sbp_queue_status, | |
2533 | .queue_tm_rsp = sbp_queue_tm_rsp, | |
131e6abc | 2534 | .aborted_task = sbp_aborted_task, |
a511ce33 CB |
2535 | .check_stop_free = sbp_check_stop_free, |
2536 | ||
2537 | .fabric_make_wwn = sbp_make_tport, | |
2538 | .fabric_drop_wwn = sbp_drop_tport, | |
2539 | .fabric_make_tpg = sbp_make_tpg, | |
2540 | .fabric_drop_tpg = sbp_drop_tpg, | |
2541 | .fabric_post_link = sbp_post_link_lun, | |
2542 | .fabric_pre_unlink = sbp_pre_unlink_lun, | |
2543 | .fabric_make_np = NULL, | |
2544 | .fabric_drop_np = NULL, | |
2545 | .fabric_make_nodeacl = sbp_make_nodeacl, | |
2546 | .fabric_drop_nodeacl = sbp_drop_nodeacl, | |
a511ce33 | 2547 | |
9ac8928e CH |
2548 | .tfc_wwn_attrs = sbp_wwn_attrs, |
2549 | .tfc_tpg_base_attrs = sbp_tpg_base_attrs, | |
2550 | .tfc_tpg_attrib_attrs = sbp_tpg_attrib_attrs, | |
a511ce33 CB |
2551 | }; |
2552 | ||
2553 | static int __init sbp_init(void) | |
2554 | { | |
9ac8928e | 2555 | return target_register_template(&sbp_ops); |
a511ce33 CB |
2556 | }; |
2557 | ||
63b91d5a | 2558 | static void __exit sbp_exit(void) |
a511ce33 | 2559 | { |
9ac8928e | 2560 | target_unregister_template(&sbp_ops); |
a511ce33 CB |
2561 | }; |
2562 | ||
2563 | MODULE_DESCRIPTION("FireWire SBP fabric driver"); | |
2564 | MODULE_LICENSE("GPL"); | |
2565 | module_init(sbp_init); | |
2566 | module_exit(sbp_exit); |