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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> | |
a511ce33 CB |
38 | #include <asm/unaligned.h> |
39 | ||
40 | #include "sbp_target.h" | |
41 | ||
a511ce33 CB |
42 | /* FireWire address region for management and command block address handlers */ |
43 | static const struct fw_address_region sbp_register_region = { | |
44 | .start = CSR_REGISTER_BASE + 0x10000, | |
45 | .end = 0x1000000000000ULL, | |
46 | }; | |
47 | ||
48 | static const u32 sbp_unit_directory_template[] = { | |
49 | 0x1200609e, /* unit_specifier_id: NCITS/T10 */ | |
50 | 0x13010483, /* unit_sw_version: 1155D Rev 4 */ | |
51 | 0x3800609e, /* command_set_specifier_id: NCITS/T10 */ | |
52 | 0x390104d8, /* command_set: SPC-2 */ | |
53 | 0x3b000000, /* command_set_revision: 0 */ | |
54 | 0x3c000001, /* firmware_revision: 1 */ | |
55 | }; | |
56 | ||
57 | #define SESSION_MAINTENANCE_INTERVAL HZ | |
58 | ||
59 | static atomic_t login_id = ATOMIC_INIT(0); | |
60 | ||
61 | static void session_maintenance_work(struct work_struct *); | |
62 | static int sbp_run_transaction(struct fw_card *, int, int, int, int, | |
63 | unsigned long long, void *, size_t); | |
64 | ||
65 | static int read_peer_guid(u64 *guid, const struct sbp_management_request *req) | |
66 | { | |
67 | int ret; | |
68 | __be32 high, low; | |
69 | ||
70 | ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST, | |
71 | req->node_addr, req->generation, req->speed, | |
72 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 3 * 4, | |
73 | &high, sizeof(high)); | |
74 | if (ret != RCODE_COMPLETE) | |
75 | return ret; | |
76 | ||
77 | ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST, | |
78 | req->node_addr, req->generation, req->speed, | |
79 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 4 * 4, | |
80 | &low, sizeof(low)); | |
81 | if (ret != RCODE_COMPLETE) | |
82 | return ret; | |
83 | ||
84 | *guid = (u64)be32_to_cpu(high) << 32 | be32_to_cpu(low); | |
85 | ||
86 | return RCODE_COMPLETE; | |
87 | } | |
88 | ||
89 | static struct sbp_session *sbp_session_find_by_guid( | |
90 | struct sbp_tpg *tpg, u64 guid) | |
91 | { | |
92 | struct se_session *se_sess; | |
93 | struct sbp_session *sess, *found = NULL; | |
94 | ||
95 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
96 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
97 | sess = se_sess->fabric_sess_ptr; | |
98 | if (sess->guid == guid) | |
99 | found = sess; | |
100 | } | |
101 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
102 | ||
103 | return found; | |
104 | } | |
105 | ||
106 | static struct sbp_login_descriptor *sbp_login_find_by_lun( | |
6bb82612 | 107 | struct sbp_session *session, u32 unpacked_lun) |
a511ce33 CB |
108 | { |
109 | struct sbp_login_descriptor *login, *found = NULL; | |
110 | ||
111 | spin_lock_bh(&session->lock); | |
112 | list_for_each_entry(login, &session->login_list, link) { | |
6bb82612 | 113 | if (login->login_lun == unpacked_lun) |
a511ce33 CB |
114 | found = login; |
115 | } | |
116 | spin_unlock_bh(&session->lock); | |
117 | ||
118 | return found; | |
119 | } | |
120 | ||
121 | static int sbp_login_count_all_by_lun( | |
122 | struct sbp_tpg *tpg, | |
6bb82612 | 123 | u32 unpacked_lun, |
a511ce33 CB |
124 | int exclusive) |
125 | { | |
126 | struct se_session *se_sess; | |
127 | struct sbp_session *sess; | |
128 | struct sbp_login_descriptor *login; | |
129 | int count = 0; | |
130 | ||
131 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
132 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
133 | sess = se_sess->fabric_sess_ptr; | |
134 | ||
135 | spin_lock_bh(&sess->lock); | |
136 | list_for_each_entry(login, &sess->login_list, link) { | |
6bb82612 | 137 | if (login->login_lun != unpacked_lun) |
a511ce33 CB |
138 | continue; |
139 | ||
140 | if (!exclusive || login->exclusive) | |
141 | count++; | |
142 | } | |
143 | spin_unlock_bh(&sess->lock); | |
144 | } | |
145 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
146 | ||
147 | return count; | |
148 | } | |
149 | ||
150 | static struct sbp_login_descriptor *sbp_login_find_by_id( | |
151 | struct sbp_tpg *tpg, int login_id) | |
152 | { | |
153 | struct se_session *se_sess; | |
154 | struct sbp_session *sess; | |
155 | struct sbp_login_descriptor *login, *found = NULL; | |
156 | ||
157 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
158 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
159 | sess = se_sess->fabric_sess_ptr; | |
160 | ||
161 | spin_lock_bh(&sess->lock); | |
162 | list_for_each_entry(login, &sess->login_list, link) { | |
163 | if (login->login_id == login_id) | |
164 | found = login; | |
165 | } | |
166 | spin_unlock_bh(&sess->lock); | |
167 | } | |
168 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
169 | ||
170 | return found; | |
171 | } | |
172 | ||
6bb82612 | 173 | static u32 sbp_get_lun_from_tpg(struct sbp_tpg *tpg, u32 login_lun, int *err) |
a511ce33 CB |
174 | { |
175 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
176 | struct se_lun *se_lun; | |
177 | ||
6bb82612 NB |
178 | rcu_read_lock(); |
179 | hlist_for_each_entry_rcu(se_lun, &se_tpg->tpg_lun_hlist, link) { | |
180 | if (se_lun->unpacked_lun == login_lun) { | |
181 | rcu_read_unlock(); | |
182 | *err = 0; | |
183 | return login_lun; | |
184 | } | |
185 | } | |
186 | rcu_read_unlock(); | |
a511ce33 | 187 | |
6bb82612 NB |
188 | *err = -ENODEV; |
189 | return login_lun; | |
a511ce33 CB |
190 | } |
191 | ||
192 | static struct sbp_session *sbp_session_create( | |
193 | struct sbp_tpg *tpg, | |
194 | u64 guid) | |
195 | { | |
196 | struct sbp_session *sess; | |
197 | int ret; | |
198 | char guid_str[17]; | |
fb444abe CH |
199 | |
200 | snprintf(guid_str, sizeof(guid_str), "%016llx", guid); | |
a511ce33 CB |
201 | |
202 | sess = kmalloc(sizeof(*sess), GFP_KERNEL); | |
203 | if (!sess) { | |
204 | pr_err("failed to allocate session descriptor\n"); | |
205 | return ERR_PTR(-ENOMEM); | |
206 | } | |
fb444abe CH |
207 | spin_lock_init(&sess->lock); |
208 | INIT_LIST_HEAD(&sess->login_list); | |
209 | INIT_DELAYED_WORK(&sess->maint_work, session_maintenance_work); | |
210 | sess->guid = guid; | |
a511ce33 | 211 | |
5a3ee221 NB |
212 | sess->se_sess = target_alloc_session(&tpg->se_tpg, 128, |
213 | sizeof(struct sbp_target_request), | |
214 | TARGET_PROT_NORMAL, guid_str, | |
215 | sess, NULL); | |
a511ce33 CB |
216 | if (IS_ERR(sess->se_sess)) { |
217 | pr_err("failed to init se_session\n"); | |
a511ce33 CB |
218 | ret = PTR_ERR(sess->se_sess); |
219 | kfree(sess); | |
220 | return ERR_PTR(ret); | |
221 | } | |
222 | ||
a511ce33 CB |
223 | return sess; |
224 | } | |
225 | ||
226 | static void sbp_session_release(struct sbp_session *sess, bool cancel_work) | |
227 | { | |
228 | spin_lock_bh(&sess->lock); | |
229 | if (!list_empty(&sess->login_list)) { | |
230 | spin_unlock_bh(&sess->lock); | |
231 | return; | |
232 | } | |
233 | spin_unlock_bh(&sess->lock); | |
234 | ||
235 | if (cancel_work) | |
236 | cancel_delayed_work_sync(&sess->maint_work); | |
237 | ||
238 | transport_deregister_session_configfs(sess->se_sess); | |
239 | transport_deregister_session(sess->se_sess); | |
240 | ||
241 | if (sess->card) | |
242 | fw_card_put(sess->card); | |
243 | ||
244 | kfree(sess); | |
245 | } | |
246 | ||
247 | static void sbp_target_agent_unregister(struct sbp_target_agent *); | |
248 | ||
249 | static void sbp_login_release(struct sbp_login_descriptor *login, | |
250 | bool cancel_work) | |
251 | { | |
252 | struct sbp_session *sess = login->sess; | |
253 | ||
254 | /* FIXME: abort/wait on tasks */ | |
255 | ||
256 | sbp_target_agent_unregister(login->tgt_agt); | |
257 | ||
258 | if (sess) { | |
259 | spin_lock_bh(&sess->lock); | |
260 | list_del(&login->link); | |
261 | spin_unlock_bh(&sess->lock); | |
262 | ||
263 | sbp_session_release(sess, cancel_work); | |
264 | } | |
265 | ||
266 | kfree(login); | |
267 | } | |
268 | ||
269 | static struct sbp_target_agent *sbp_target_agent_register( | |
270 | struct sbp_login_descriptor *); | |
271 | ||
272 | static void sbp_management_request_login( | |
273 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
274 | int *status_data_size) | |
275 | { | |
276 | struct sbp_tport *tport = agent->tport; | |
277 | struct sbp_tpg *tpg = tport->tpg; | |
a511ce33 CB |
278 | struct sbp_session *sess; |
279 | struct sbp_login_descriptor *login; | |
280 | struct sbp_login_response_block *response; | |
6bb82612 NB |
281 | u64 guid; |
282 | u32 unpacked_lun; | |
283 | int login_response_len, ret; | |
a511ce33 | 284 | |
6bb82612 NB |
285 | unpacked_lun = sbp_get_lun_from_tpg(tpg, |
286 | LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc)), &ret); | |
287 | if (ret) { | |
a511ce33 CB |
288 | pr_notice("login to unknown LUN: %d\n", |
289 | LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc))); | |
290 | ||
291 | req->status.status = cpu_to_be32( | |
292 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
293 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LUN_NOTSUPP)); | |
294 | return; | |
295 | } | |
296 | ||
297 | ret = read_peer_guid(&guid, req); | |
298 | if (ret != RCODE_COMPLETE) { | |
299 | pr_warn("failed to read peer GUID: %d\n", ret); | |
300 | ||
301 | req->status.status = cpu_to_be32( | |
302 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
303 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
304 | return; | |
305 | } | |
306 | ||
307 | pr_notice("mgt_agent LOGIN to LUN %d from %016llx\n", | |
6bb82612 | 308 | unpacked_lun, guid); |
a511ce33 CB |
309 | |
310 | sess = sbp_session_find_by_guid(tpg, guid); | |
311 | if (sess) { | |
6bb82612 | 312 | login = sbp_login_find_by_lun(sess, unpacked_lun); |
a511ce33 CB |
313 | if (login) { |
314 | pr_notice("initiator already logged-in\n"); | |
315 | ||
316 | /* | |
317 | * SBP-2 R4 says we should return access denied, but | |
318 | * that can confuse initiators. Instead we need to | |
319 | * treat this like a reconnect, but send the login | |
320 | * response block like a fresh login. | |
321 | * | |
322 | * This is required particularly in the case of Apple | |
323 | * devices booting off the FireWire target, where | |
324 | * the firmware has an active login to the target. When | |
325 | * the OS takes control of the session it issues its own | |
326 | * LOGIN rather than a RECONNECT. To avoid the machine | |
327 | * waiting until the reconnect_hold expires, we can skip | |
328 | * the ACCESS_DENIED errors to speed things up. | |
329 | */ | |
330 | ||
331 | goto already_logged_in; | |
332 | } | |
333 | } | |
334 | ||
335 | /* | |
336 | * check exclusive bit in login request | |
337 | * reject with access_denied if any logins present | |
338 | */ | |
339 | if (LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)) && | |
6bb82612 | 340 | sbp_login_count_all_by_lun(tpg, unpacked_lun, 0)) { |
a511ce33 CB |
341 | pr_warn("refusing exclusive login with other active logins\n"); |
342 | ||
343 | req->status.status = cpu_to_be32( | |
344 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
345 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
346 | return; | |
347 | } | |
348 | ||
349 | /* | |
350 | * check exclusive bit in any existing login descriptor | |
351 | * reject with access_denied if any exclusive logins present | |
352 | */ | |
6bb82612 | 353 | if (sbp_login_count_all_by_lun(tpg, unpacked_lun, 1)) { |
a511ce33 CB |
354 | pr_warn("refusing login while another exclusive login present\n"); |
355 | ||
356 | req->status.status = cpu_to_be32( | |
357 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
358 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
359 | return; | |
360 | } | |
361 | ||
362 | /* | |
363 | * check we haven't exceeded the number of allowed logins | |
364 | * reject with resources_unavailable if we have | |
365 | */ | |
6bb82612 | 366 | if (sbp_login_count_all_by_lun(tpg, unpacked_lun, 0) >= |
a511ce33 CB |
367 | tport->max_logins_per_lun) { |
368 | pr_warn("max number of logins reached\n"); | |
369 | ||
370 | req->status.status = cpu_to_be32( | |
371 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
372 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
373 | return; | |
374 | } | |
375 | ||
376 | if (!sess) { | |
377 | sess = sbp_session_create(tpg, guid); | |
378 | if (IS_ERR(sess)) { | |
379 | switch (PTR_ERR(sess)) { | |
380 | case -EPERM: | |
381 | ret = SBP_STATUS_ACCESS_DENIED; | |
382 | break; | |
383 | default: | |
384 | ret = SBP_STATUS_RESOURCES_UNAVAIL; | |
385 | break; | |
386 | } | |
387 | ||
388 | req->status.status = cpu_to_be32( | |
389 | STATUS_BLOCK_RESP( | |
390 | STATUS_RESP_REQUEST_COMPLETE) | | |
391 | STATUS_BLOCK_SBP_STATUS(ret)); | |
392 | return; | |
393 | } | |
394 | ||
395 | sess->node_id = req->node_addr; | |
396 | sess->card = fw_card_get(req->card); | |
397 | sess->generation = req->generation; | |
398 | sess->speed = req->speed; | |
399 | ||
400 | schedule_delayed_work(&sess->maint_work, | |
401 | SESSION_MAINTENANCE_INTERVAL); | |
402 | } | |
403 | ||
404 | /* only take the latest reconnect_hold into account */ | |
405 | sess->reconnect_hold = min( | |
406 | 1 << LOGIN_ORB_RECONNECT(be32_to_cpu(req->orb.misc)), | |
407 | tport->max_reconnect_timeout) - 1; | |
408 | ||
409 | login = kmalloc(sizeof(*login), GFP_KERNEL); | |
410 | if (!login) { | |
411 | pr_err("failed to allocate login descriptor\n"); | |
412 | ||
413 | sbp_session_release(sess, true); | |
414 | ||
415 | req->status.status = cpu_to_be32( | |
416 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
417 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
418 | return; | |
419 | } | |
420 | ||
421 | login->sess = sess; | |
6bb82612 | 422 | login->login_lun = unpacked_lun; |
a511ce33 CB |
423 | login->status_fifo_addr = sbp2_pointer_to_addr(&req->orb.status_fifo); |
424 | login->exclusive = LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)); | |
425 | login->login_id = atomic_inc_return(&login_id); | |
426 | ||
427 | login->tgt_agt = sbp_target_agent_register(login); | |
428 | if (IS_ERR(login->tgt_agt)) { | |
429 | ret = PTR_ERR(login->tgt_agt); | |
430 | pr_err("failed to map command block handler: %d\n", ret); | |
431 | ||
432 | sbp_session_release(sess, true); | |
433 | kfree(login); | |
434 | ||
435 | req->status.status = cpu_to_be32( | |
436 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
437 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
438 | return; | |
439 | } | |
440 | ||
441 | spin_lock_bh(&sess->lock); | |
442 | list_add_tail(&login->link, &sess->login_list); | |
443 | spin_unlock_bh(&sess->lock); | |
444 | ||
445 | already_logged_in: | |
446 | response = kzalloc(sizeof(*response), GFP_KERNEL); | |
447 | if (!response) { | |
448 | pr_err("failed to allocate login response block\n"); | |
449 | ||
450 | sbp_login_release(login, true); | |
451 | ||
452 | req->status.status = cpu_to_be32( | |
453 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
454 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
455 | return; | |
456 | } | |
457 | ||
458 | login_response_len = clamp_val( | |
459 | LOGIN_ORB_RESPONSE_LENGTH(be32_to_cpu(req->orb.length)), | |
460 | 12, sizeof(*response)); | |
461 | response->misc = cpu_to_be32( | |
462 | ((login_response_len & 0xffff) << 16) | | |
463 | (login->login_id & 0xffff)); | |
464 | response->reconnect_hold = cpu_to_be32(sess->reconnect_hold & 0xffff); | |
465 | addr_to_sbp2_pointer(login->tgt_agt->handler.offset, | |
466 | &response->command_block_agent); | |
467 | ||
468 | ret = sbp_run_transaction(sess->card, TCODE_WRITE_BLOCK_REQUEST, | |
469 | sess->node_id, sess->generation, sess->speed, | |
470 | sbp2_pointer_to_addr(&req->orb.ptr2), response, | |
471 | login_response_len); | |
472 | if (ret != RCODE_COMPLETE) { | |
473 | pr_debug("failed to write login response block: %x\n", ret); | |
474 | ||
475 | kfree(response); | |
476 | sbp_login_release(login, true); | |
477 | ||
478 | req->status.status = cpu_to_be32( | |
479 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
480 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
481 | return; | |
482 | } | |
483 | ||
484 | kfree(response); | |
485 | ||
486 | req->status.status = cpu_to_be32( | |
487 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
488 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
489 | } | |
490 | ||
491 | static void sbp_management_request_query_logins( | |
492 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
493 | int *status_data_size) | |
494 | { | |
495 | pr_notice("QUERY LOGINS not implemented\n"); | |
496 | /* FIXME: implement */ | |
497 | ||
498 | req->status.status = cpu_to_be32( | |
499 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
500 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
501 | } | |
502 | ||
503 | static void sbp_management_request_reconnect( | |
504 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
505 | int *status_data_size) | |
506 | { | |
507 | struct sbp_tport *tport = agent->tport; | |
508 | struct sbp_tpg *tpg = tport->tpg; | |
509 | int ret; | |
510 | u64 guid; | |
511 | struct sbp_login_descriptor *login; | |
512 | ||
513 | ret = read_peer_guid(&guid, req); | |
514 | if (ret != RCODE_COMPLETE) { | |
515 | pr_warn("failed to read peer GUID: %d\n", ret); | |
516 | ||
517 | req->status.status = cpu_to_be32( | |
518 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
519 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
520 | return; | |
521 | } | |
522 | ||
523 | pr_notice("mgt_agent RECONNECT from %016llx\n", guid); | |
524 | ||
525 | login = sbp_login_find_by_id(tpg, | |
526 | RECONNECT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc))); | |
527 | ||
528 | if (!login) { | |
529 | pr_err("mgt_agent RECONNECT unknown login ID\n"); | |
530 | ||
531 | req->status.status = cpu_to_be32( | |
532 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
533 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
534 | return; | |
535 | } | |
536 | ||
537 | if (login->sess->guid != guid) { | |
538 | pr_err("mgt_agent RECONNECT login GUID doesn't match\n"); | |
539 | ||
540 | req->status.status = cpu_to_be32( | |
541 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
542 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
543 | return; | |
544 | } | |
545 | ||
546 | spin_lock_bh(&login->sess->lock); | |
547 | if (login->sess->card) | |
548 | fw_card_put(login->sess->card); | |
549 | ||
550 | /* update the node details */ | |
551 | login->sess->generation = req->generation; | |
552 | login->sess->node_id = req->node_addr; | |
553 | login->sess->card = fw_card_get(req->card); | |
554 | login->sess->speed = req->speed; | |
555 | spin_unlock_bh(&login->sess->lock); | |
556 | ||
557 | req->status.status = cpu_to_be32( | |
558 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
559 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
560 | } | |
561 | ||
562 | static void sbp_management_request_logout( | |
563 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
564 | int *status_data_size) | |
565 | { | |
566 | struct sbp_tport *tport = agent->tport; | |
567 | struct sbp_tpg *tpg = tport->tpg; | |
5f2a3d61 | 568 | int id; |
a511ce33 CB |
569 | struct sbp_login_descriptor *login; |
570 | ||
5f2a3d61 | 571 | id = LOGOUT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc)); |
a511ce33 | 572 | |
5f2a3d61 | 573 | login = sbp_login_find_by_id(tpg, id); |
a511ce33 | 574 | if (!login) { |
5f2a3d61 | 575 | pr_warn("cannot find login: %d\n", id); |
a511ce33 CB |
576 | |
577 | req->status.status = cpu_to_be32( | |
578 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
579 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LOGIN_ID_UNKNOWN)); | |
580 | return; | |
581 | } | |
582 | ||
583 | pr_info("mgt_agent LOGOUT from LUN %d session %d\n", | |
6bb82612 | 584 | login->login_lun, login->login_id); |
a511ce33 CB |
585 | |
586 | if (req->node_addr != login->sess->node_id) { | |
587 | pr_warn("logout from different node ID\n"); | |
588 | ||
589 | req->status.status = cpu_to_be32( | |
590 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
591 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
592 | return; | |
593 | } | |
594 | ||
595 | sbp_login_release(login, true); | |
596 | ||
597 | req->status.status = cpu_to_be32( | |
598 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
599 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
600 | } | |
601 | ||
602 | static void session_check_for_reset(struct sbp_session *sess) | |
603 | { | |
604 | bool card_valid = false; | |
605 | ||
606 | spin_lock_bh(&sess->lock); | |
607 | ||
608 | if (sess->card) { | |
609 | spin_lock_irq(&sess->card->lock); | |
610 | card_valid = (sess->card->local_node != NULL); | |
611 | spin_unlock_irq(&sess->card->lock); | |
612 | ||
613 | if (!card_valid) { | |
614 | fw_card_put(sess->card); | |
615 | sess->card = NULL; | |
616 | } | |
617 | } | |
618 | ||
619 | if (!card_valid || (sess->generation != sess->card->generation)) { | |
620 | pr_info("Waiting for reconnect from node: %016llx\n", | |
621 | sess->guid); | |
622 | ||
623 | sess->node_id = -1; | |
624 | sess->reconnect_expires = get_jiffies_64() + | |
625 | ((sess->reconnect_hold + 1) * HZ); | |
626 | } | |
627 | ||
628 | spin_unlock_bh(&sess->lock); | |
629 | } | |
630 | ||
631 | static void session_reconnect_expired(struct sbp_session *sess) | |
632 | { | |
633 | struct sbp_login_descriptor *login, *temp; | |
634 | LIST_HEAD(login_list); | |
635 | ||
636 | pr_info("Reconnect timer expired for node: %016llx\n", sess->guid); | |
637 | ||
638 | spin_lock_bh(&sess->lock); | |
639 | list_for_each_entry_safe(login, temp, &sess->login_list, link) { | |
640 | login->sess = NULL; | |
bf11eefc | 641 | list_move_tail(&login->link, &login_list); |
a511ce33 CB |
642 | } |
643 | spin_unlock_bh(&sess->lock); | |
644 | ||
645 | list_for_each_entry_safe(login, temp, &login_list, link) { | |
646 | list_del(&login->link); | |
647 | sbp_login_release(login, false); | |
648 | } | |
649 | ||
650 | sbp_session_release(sess, false); | |
651 | } | |
652 | ||
653 | static void session_maintenance_work(struct work_struct *work) | |
654 | { | |
655 | struct sbp_session *sess = container_of(work, struct sbp_session, | |
656 | maint_work.work); | |
657 | ||
658 | /* could be called while tearing down the session */ | |
659 | spin_lock_bh(&sess->lock); | |
660 | if (list_empty(&sess->login_list)) { | |
661 | spin_unlock_bh(&sess->lock); | |
662 | return; | |
663 | } | |
664 | spin_unlock_bh(&sess->lock); | |
665 | ||
666 | if (sess->node_id != -1) { | |
667 | /* check for bus reset and make node_id invalid */ | |
668 | session_check_for_reset(sess); | |
669 | ||
670 | schedule_delayed_work(&sess->maint_work, | |
671 | SESSION_MAINTENANCE_INTERVAL); | |
672 | } else if (!time_after64(get_jiffies_64(), sess->reconnect_expires)) { | |
673 | /* still waiting for reconnect */ | |
674 | schedule_delayed_work(&sess->maint_work, | |
675 | SESSION_MAINTENANCE_INTERVAL); | |
676 | } else { | |
677 | /* reconnect timeout has expired */ | |
678 | session_reconnect_expired(sess); | |
679 | } | |
680 | } | |
681 | ||
682 | static int tgt_agent_rw_agent_state(struct fw_card *card, int tcode, void *data, | |
683 | struct sbp_target_agent *agent) | |
684 | { | |
37419d67 | 685 | int state; |
a511ce33 CB |
686 | |
687 | switch (tcode) { | |
688 | case TCODE_READ_QUADLET_REQUEST: | |
689 | pr_debug("tgt_agent AGENT_STATE READ\n"); | |
690 | ||
691 | spin_lock_bh(&agent->lock); | |
37419d67 | 692 | state = agent->state; |
a511ce33 | 693 | spin_unlock_bh(&agent->lock); |
37419d67 CB |
694 | |
695 | *(__be32 *)data = cpu_to_be32(state); | |
a511ce33 CB |
696 | |
697 | return RCODE_COMPLETE; | |
698 | ||
699 | case TCODE_WRITE_QUADLET_REQUEST: | |
700 | /* ignored */ | |
701 | return RCODE_COMPLETE; | |
702 | ||
703 | default: | |
704 | return RCODE_TYPE_ERROR; | |
705 | } | |
706 | } | |
707 | ||
708 | static int tgt_agent_rw_agent_reset(struct fw_card *card, int tcode, void *data, | |
709 | struct sbp_target_agent *agent) | |
710 | { | |
711 | switch (tcode) { | |
712 | case TCODE_WRITE_QUADLET_REQUEST: | |
713 | pr_debug("tgt_agent AGENT_RESET\n"); | |
714 | spin_lock_bh(&agent->lock); | |
715 | agent->state = AGENT_STATE_RESET; | |
716 | spin_unlock_bh(&agent->lock); | |
717 | return RCODE_COMPLETE; | |
718 | ||
719 | default: | |
720 | return RCODE_TYPE_ERROR; | |
721 | } | |
722 | } | |
723 | ||
724 | static int tgt_agent_rw_orb_pointer(struct fw_card *card, int tcode, void *data, | |
725 | struct sbp_target_agent *agent) | |
726 | { | |
727 | struct sbp2_pointer *ptr = data; | |
728 | ||
729 | switch (tcode) { | |
730 | case TCODE_WRITE_BLOCK_REQUEST: | |
731 | spin_lock_bh(&agent->lock); | |
732 | if (agent->state != AGENT_STATE_SUSPENDED && | |
733 | agent->state != AGENT_STATE_RESET) { | |
734 | spin_unlock_bh(&agent->lock); | |
735 | pr_notice("Ignoring ORB_POINTER write while active.\n"); | |
736 | return RCODE_CONFLICT_ERROR; | |
737 | } | |
738 | agent->state = AGENT_STATE_ACTIVE; | |
739 | spin_unlock_bh(&agent->lock); | |
740 | ||
741 | agent->orb_pointer = sbp2_pointer_to_addr(ptr); | |
742 | agent->doorbell = false; | |
743 | ||
744 | pr_debug("tgt_agent ORB_POINTER write: 0x%llx\n", | |
745 | agent->orb_pointer); | |
746 | ||
747 | queue_work(system_unbound_wq, &agent->work); | |
748 | ||
749 | return RCODE_COMPLETE; | |
750 | ||
751 | case TCODE_READ_BLOCK_REQUEST: | |
752 | pr_debug("tgt_agent ORB_POINTER READ\n"); | |
753 | spin_lock_bh(&agent->lock); | |
754 | addr_to_sbp2_pointer(agent->orb_pointer, ptr); | |
755 | spin_unlock_bh(&agent->lock); | |
756 | return RCODE_COMPLETE; | |
757 | ||
758 | default: | |
759 | return RCODE_TYPE_ERROR; | |
760 | } | |
761 | } | |
762 | ||
763 | static int tgt_agent_rw_doorbell(struct fw_card *card, int tcode, void *data, | |
764 | struct sbp_target_agent *agent) | |
765 | { | |
766 | switch (tcode) { | |
767 | case TCODE_WRITE_QUADLET_REQUEST: | |
768 | spin_lock_bh(&agent->lock); | |
769 | if (agent->state != AGENT_STATE_SUSPENDED) { | |
770 | spin_unlock_bh(&agent->lock); | |
771 | pr_debug("Ignoring DOORBELL while active.\n"); | |
772 | return RCODE_CONFLICT_ERROR; | |
773 | } | |
774 | agent->state = AGENT_STATE_ACTIVE; | |
775 | spin_unlock_bh(&agent->lock); | |
776 | ||
777 | agent->doorbell = true; | |
778 | ||
779 | pr_debug("tgt_agent DOORBELL\n"); | |
780 | ||
781 | queue_work(system_unbound_wq, &agent->work); | |
782 | ||
783 | return RCODE_COMPLETE; | |
784 | ||
785 | case TCODE_READ_QUADLET_REQUEST: | |
786 | return RCODE_COMPLETE; | |
787 | ||
788 | default: | |
789 | return RCODE_TYPE_ERROR; | |
790 | } | |
791 | } | |
792 | ||
793 | static int tgt_agent_rw_unsolicited_status_enable(struct fw_card *card, | |
794 | int tcode, void *data, struct sbp_target_agent *agent) | |
795 | { | |
796 | switch (tcode) { | |
797 | case TCODE_WRITE_QUADLET_REQUEST: | |
798 | pr_debug("tgt_agent UNSOLICITED_STATUS_ENABLE\n"); | |
799 | /* ignored as we don't send unsolicited status */ | |
800 | return RCODE_COMPLETE; | |
801 | ||
802 | case TCODE_READ_QUADLET_REQUEST: | |
803 | return RCODE_COMPLETE; | |
804 | ||
805 | default: | |
806 | return RCODE_TYPE_ERROR; | |
807 | } | |
808 | } | |
809 | ||
810 | static void tgt_agent_rw(struct fw_card *card, struct fw_request *request, | |
811 | int tcode, int destination, int source, int generation, | |
812 | unsigned long long offset, void *data, size_t length, | |
813 | void *callback_data) | |
814 | { | |
815 | struct sbp_target_agent *agent = callback_data; | |
816 | struct sbp_session *sess = agent->login->sess; | |
817 | int sess_gen, sess_node, rcode; | |
818 | ||
819 | spin_lock_bh(&sess->lock); | |
820 | sess_gen = sess->generation; | |
821 | sess_node = sess->node_id; | |
822 | spin_unlock_bh(&sess->lock); | |
823 | ||
824 | if (generation != sess_gen) { | |
825 | pr_notice("ignoring request with wrong generation\n"); | |
826 | rcode = RCODE_TYPE_ERROR; | |
827 | goto out; | |
828 | } | |
829 | ||
830 | if (source != sess_node) { | |
831 | pr_notice("ignoring request from foreign node (%x != %x)\n", | |
832 | source, sess_node); | |
833 | rcode = RCODE_TYPE_ERROR; | |
834 | goto out; | |
835 | } | |
836 | ||
837 | /* turn offset into the offset from the start of the block */ | |
838 | offset -= agent->handler.offset; | |
839 | ||
840 | if (offset == 0x00 && length == 4) { | |
841 | /* AGENT_STATE */ | |
842 | rcode = tgt_agent_rw_agent_state(card, tcode, data, agent); | |
843 | } else if (offset == 0x04 && length == 4) { | |
844 | /* AGENT_RESET */ | |
845 | rcode = tgt_agent_rw_agent_reset(card, tcode, data, agent); | |
846 | } else if (offset == 0x08 && length == 8) { | |
847 | /* ORB_POINTER */ | |
848 | rcode = tgt_agent_rw_orb_pointer(card, tcode, data, agent); | |
849 | } else if (offset == 0x10 && length == 4) { | |
850 | /* DOORBELL */ | |
851 | rcode = tgt_agent_rw_doorbell(card, tcode, data, agent); | |
852 | } else if (offset == 0x14 && length == 4) { | |
853 | /* UNSOLICITED_STATUS_ENABLE */ | |
854 | rcode = tgt_agent_rw_unsolicited_status_enable(card, tcode, | |
855 | data, agent); | |
856 | } else { | |
857 | rcode = RCODE_ADDRESS_ERROR; | |
858 | } | |
859 | ||
860 | out: | |
861 | fw_send_response(card, request, rcode); | |
862 | } | |
863 | ||
864 | static void sbp_handle_command(struct sbp_target_request *); | |
865 | static int sbp_send_status(struct sbp_target_request *); | |
866 | static void sbp_free_request(struct sbp_target_request *); | |
867 | ||
868 | static void tgt_agent_process_work(struct work_struct *work) | |
869 | { | |
870 | struct sbp_target_request *req = | |
871 | container_of(work, struct sbp_target_request, work); | |
872 | ||
873 | pr_debug("tgt_orb ptr:0x%llx next_ORB:0x%llx data_descriptor:0x%llx misc:0x%x\n", | |
874 | req->orb_pointer, | |
875 | sbp2_pointer_to_addr(&req->orb.next_orb), | |
876 | sbp2_pointer_to_addr(&req->orb.data_descriptor), | |
877 | be32_to_cpu(req->orb.misc)); | |
878 | ||
879 | if (req->orb_pointer >> 32) | |
880 | pr_debug("ORB with high bits set\n"); | |
881 | ||
882 | switch (ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc))) { | |
883 | case 0:/* Format specified by this standard */ | |
884 | sbp_handle_command(req); | |
885 | return; | |
886 | case 1: /* Reserved for future standardization */ | |
887 | case 2: /* Vendor-dependent */ | |
888 | req->status.status |= cpu_to_be32( | |
889 | STATUS_BLOCK_RESP( | |
890 | STATUS_RESP_REQUEST_COMPLETE) | | |
891 | STATUS_BLOCK_DEAD(0) | | |
892 | STATUS_BLOCK_LEN(1) | | |
893 | STATUS_BLOCK_SBP_STATUS( | |
894 | SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
895 | sbp_send_status(req); | |
a511ce33 CB |
896 | return; |
897 | case 3: /* Dummy ORB */ | |
898 | req->status.status |= cpu_to_be32( | |
899 | STATUS_BLOCK_RESP( | |
900 | STATUS_RESP_REQUEST_COMPLETE) | | |
901 | STATUS_BLOCK_DEAD(0) | | |
902 | STATUS_BLOCK_LEN(1) | | |
903 | STATUS_BLOCK_SBP_STATUS( | |
904 | SBP_STATUS_DUMMY_ORB_COMPLETE)); | |
905 | sbp_send_status(req); | |
a511ce33 CB |
906 | return; |
907 | default: | |
908 | BUG(); | |
909 | } | |
910 | } | |
911 | ||
912 | /* used to double-check we haven't been issued an AGENT_RESET */ | |
913 | static inline bool tgt_agent_check_active(struct sbp_target_agent *agent) | |
914 | { | |
915 | bool active; | |
916 | ||
917 | spin_lock_bh(&agent->lock); | |
918 | active = (agent->state == AGENT_STATE_ACTIVE); | |
919 | spin_unlock_bh(&agent->lock); | |
920 | ||
921 | return active; | |
922 | } | |
923 | ||
5a3ee221 NB |
924 | static struct sbp_target_request *sbp_mgt_get_req(struct sbp_session *sess, |
925 | struct fw_card *card, u64 next_orb) | |
926 | { | |
927 | struct se_session *se_sess = sess->se_sess; | |
928 | struct sbp_target_request *req; | |
929 | int tag; | |
930 | ||
931 | tag = percpu_ida_alloc(&se_sess->sess_tag_pool, GFP_ATOMIC); | |
932 | if (tag < 0) | |
933 | return ERR_PTR(-ENOMEM); | |
934 | ||
935 | req = &((struct sbp_target_request *)se_sess->sess_cmd_map)[tag]; | |
936 | memset(req, 0, sizeof(*req)); | |
937 | req->se_cmd.map_tag = tag; | |
938 | req->se_cmd.tag = next_orb; | |
939 | ||
940 | return req; | |
941 | } | |
942 | ||
a511ce33 CB |
943 | static void tgt_agent_fetch_work(struct work_struct *work) |
944 | { | |
945 | struct sbp_target_agent *agent = | |
946 | container_of(work, struct sbp_target_agent, work); | |
947 | struct sbp_session *sess = agent->login->sess; | |
948 | struct sbp_target_request *req; | |
949 | int ret; | |
950 | bool doorbell = agent->doorbell; | |
951 | u64 next_orb = agent->orb_pointer; | |
952 | ||
953 | while (next_orb && tgt_agent_check_active(agent)) { | |
5a3ee221 NB |
954 | req = sbp_mgt_get_req(sess, sess->card, next_orb); |
955 | if (IS_ERR(req)) { | |
a511ce33 CB |
956 | spin_lock_bh(&agent->lock); |
957 | agent->state = AGENT_STATE_DEAD; | |
958 | spin_unlock_bh(&agent->lock); | |
959 | return; | |
960 | } | |
961 | ||
962 | req->login = agent->login; | |
963 | req->orb_pointer = next_orb; | |
964 | ||
965 | req->status.status = cpu_to_be32(STATUS_BLOCK_ORB_OFFSET_HIGH( | |
966 | req->orb_pointer >> 32)); | |
967 | req->status.orb_low = cpu_to_be32( | |
968 | req->orb_pointer & 0xfffffffc); | |
969 | ||
970 | /* read in the ORB */ | |
971 | ret = sbp_run_transaction(sess->card, TCODE_READ_BLOCK_REQUEST, | |
972 | sess->node_id, sess->generation, sess->speed, | |
973 | req->orb_pointer, &req->orb, sizeof(req->orb)); | |
974 | if (ret != RCODE_COMPLETE) { | |
975 | pr_debug("tgt_orb fetch failed: %x\n", ret); | |
976 | req->status.status |= cpu_to_be32( | |
977 | STATUS_BLOCK_SRC( | |
978 | STATUS_SRC_ORB_FINISHED) | | |
979 | STATUS_BLOCK_RESP( | |
980 | STATUS_RESP_TRANSPORT_FAILURE) | | |
981 | STATUS_BLOCK_DEAD(1) | | |
982 | STATUS_BLOCK_LEN(1) | | |
983 | STATUS_BLOCK_SBP_STATUS( | |
984 | SBP_STATUS_UNSPECIFIED_ERROR)); | |
985 | spin_lock_bh(&agent->lock); | |
986 | agent->state = AGENT_STATE_DEAD; | |
987 | spin_unlock_bh(&agent->lock); | |
988 | ||
989 | sbp_send_status(req); | |
a511ce33 CB |
990 | return; |
991 | } | |
992 | ||
993 | /* check the next_ORB field */ | |
994 | if (be32_to_cpu(req->orb.next_orb.high) & 0x80000000) { | |
995 | next_orb = 0; | |
996 | req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC( | |
997 | STATUS_SRC_ORB_FINISHED)); | |
998 | } else { | |
999 | next_orb = sbp2_pointer_to_addr(&req->orb.next_orb); | |
1000 | req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC( | |
1001 | STATUS_SRC_ORB_CONTINUING)); | |
1002 | } | |
1003 | ||
1004 | if (tgt_agent_check_active(agent) && !doorbell) { | |
1005 | INIT_WORK(&req->work, tgt_agent_process_work); | |
1006 | queue_work(system_unbound_wq, &req->work); | |
1007 | } else { | |
1008 | /* don't process this request, just check next_ORB */ | |
1009 | sbp_free_request(req); | |
1010 | } | |
1011 | ||
1012 | spin_lock_bh(&agent->lock); | |
1013 | doorbell = agent->doorbell = false; | |
1014 | ||
1015 | /* check if we should carry on processing */ | |
1016 | if (next_orb) | |
1017 | agent->orb_pointer = next_orb; | |
1018 | else | |
1019 | agent->state = AGENT_STATE_SUSPENDED; | |
1020 | ||
1021 | spin_unlock_bh(&agent->lock); | |
1022 | }; | |
1023 | } | |
1024 | ||
1025 | static struct sbp_target_agent *sbp_target_agent_register( | |
1026 | struct sbp_login_descriptor *login) | |
1027 | { | |
1028 | struct sbp_target_agent *agent; | |
1029 | int ret; | |
1030 | ||
1031 | agent = kmalloc(sizeof(*agent), GFP_KERNEL); | |
1032 | if (!agent) | |
1033 | return ERR_PTR(-ENOMEM); | |
1034 | ||
1035 | spin_lock_init(&agent->lock); | |
1036 | ||
1037 | agent->handler.length = 0x20; | |
1038 | agent->handler.address_callback = tgt_agent_rw; | |
1039 | agent->handler.callback_data = agent; | |
1040 | ||
1041 | agent->login = login; | |
1042 | agent->state = AGENT_STATE_RESET; | |
1043 | INIT_WORK(&agent->work, tgt_agent_fetch_work); | |
1044 | agent->orb_pointer = 0; | |
1045 | agent->doorbell = false; | |
1046 | ||
1047 | ret = fw_core_add_address_handler(&agent->handler, | |
1048 | &sbp_register_region); | |
1049 | if (ret < 0) { | |
1050 | kfree(agent); | |
1051 | return ERR_PTR(ret); | |
1052 | } | |
1053 | ||
1054 | return agent; | |
1055 | } | |
1056 | ||
1057 | static void sbp_target_agent_unregister(struct sbp_target_agent *agent) | |
1058 | { | |
1059 | fw_core_remove_address_handler(&agent->handler); | |
1060 | cancel_work_sync(&agent->work); | |
1061 | kfree(agent); | |
1062 | } | |
1063 | ||
1064 | /* | |
1065 | * Simple wrapper around fw_run_transaction that retries the transaction several | |
1066 | * times in case of failure, with an exponential backoff. | |
1067 | */ | |
1068 | static int sbp_run_transaction(struct fw_card *card, int tcode, int destination_id, | |
1069 | int generation, int speed, unsigned long long offset, | |
1070 | void *payload, size_t length) | |
1071 | { | |
1072 | int attempt, ret, delay; | |
1073 | ||
1074 | for (attempt = 1; attempt <= 5; attempt++) { | |
1075 | ret = fw_run_transaction(card, tcode, destination_id, | |
1076 | generation, speed, offset, payload, length); | |
1077 | ||
1078 | switch (ret) { | |
1079 | case RCODE_COMPLETE: | |
1080 | case RCODE_TYPE_ERROR: | |
1081 | case RCODE_ADDRESS_ERROR: | |
1082 | case RCODE_GENERATION: | |
1083 | return ret; | |
1084 | ||
1085 | default: | |
1086 | delay = 5 * attempt * attempt; | |
1087 | usleep_range(delay, delay * 2); | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | return ret; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Wrapper around sbp_run_transaction that gets the card, destination, | |
1096 | * generation and speed out of the request's session. | |
1097 | */ | |
1098 | static int sbp_run_request_transaction(struct sbp_target_request *req, | |
1099 | int tcode, unsigned long long offset, void *payload, | |
1100 | size_t length) | |
1101 | { | |
1102 | struct sbp_login_descriptor *login = req->login; | |
1103 | struct sbp_session *sess = login->sess; | |
1104 | struct fw_card *card; | |
1105 | int node_id, generation, speed, ret; | |
1106 | ||
1107 | spin_lock_bh(&sess->lock); | |
1108 | card = fw_card_get(sess->card); | |
1109 | node_id = sess->node_id; | |
1110 | generation = sess->generation; | |
1111 | speed = sess->speed; | |
1112 | spin_unlock_bh(&sess->lock); | |
1113 | ||
1114 | ret = sbp_run_transaction(card, tcode, node_id, generation, speed, | |
1115 | offset, payload, length); | |
1116 | ||
1117 | fw_card_put(card); | |
1118 | ||
1119 | return ret; | |
1120 | } | |
1121 | ||
1122 | static int sbp_fetch_command(struct sbp_target_request *req) | |
1123 | { | |
1124 | int ret, cmd_len, copy_len; | |
1125 | ||
1126 | cmd_len = scsi_command_size(req->orb.command_block); | |
1127 | ||
1128 | req->cmd_buf = kmalloc(cmd_len, GFP_KERNEL); | |
1129 | if (!req->cmd_buf) | |
1130 | return -ENOMEM; | |
1131 | ||
1132 | memcpy(req->cmd_buf, req->orb.command_block, | |
1133 | min_t(int, cmd_len, sizeof(req->orb.command_block))); | |
1134 | ||
1135 | if (cmd_len > sizeof(req->orb.command_block)) { | |
1136 | pr_debug("sbp_fetch_command: filling in long command\n"); | |
1137 | copy_len = cmd_len - sizeof(req->orb.command_block); | |
1138 | ||
1139 | ret = sbp_run_request_transaction(req, | |
1140 | TCODE_READ_BLOCK_REQUEST, | |
1141 | req->orb_pointer + sizeof(req->orb), | |
1142 | req->cmd_buf + sizeof(req->orb.command_block), | |
1143 | copy_len); | |
1144 | if (ret != RCODE_COMPLETE) | |
1145 | return -EIO; | |
1146 | } | |
1147 | ||
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | static int sbp_fetch_page_table(struct sbp_target_request *req) | |
1152 | { | |
1153 | int pg_tbl_sz, ret; | |
1154 | struct sbp_page_table_entry *pg_tbl; | |
1155 | ||
1156 | if (!CMDBLK_ORB_PG_TBL_PRESENT(be32_to_cpu(req->orb.misc))) | |
1157 | return 0; | |
1158 | ||
1159 | pg_tbl_sz = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)) * | |
1160 | sizeof(struct sbp_page_table_entry); | |
1161 | ||
1162 | pg_tbl = kmalloc(pg_tbl_sz, GFP_KERNEL); | |
1163 | if (!pg_tbl) | |
1164 | return -ENOMEM; | |
1165 | ||
1166 | ret = sbp_run_request_transaction(req, TCODE_READ_BLOCK_REQUEST, | |
1167 | sbp2_pointer_to_addr(&req->orb.data_descriptor), | |
1168 | pg_tbl, pg_tbl_sz); | |
1169 | if (ret != RCODE_COMPLETE) { | |
1170 | kfree(pg_tbl); | |
1171 | return -EIO; | |
1172 | } | |
1173 | ||
1174 | req->pg_tbl = pg_tbl; | |
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | static void sbp_calc_data_length_direction(struct sbp_target_request *req, | |
1179 | u32 *data_len, enum dma_data_direction *data_dir) | |
1180 | { | |
1181 | int data_size, direction, idx; | |
1182 | ||
1183 | data_size = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)); | |
1184 | direction = CMDBLK_ORB_DIRECTION(be32_to_cpu(req->orb.misc)); | |
1185 | ||
1186 | if (!data_size) { | |
1187 | *data_len = 0; | |
1188 | *data_dir = DMA_NONE; | |
1189 | return; | |
1190 | } | |
1191 | ||
1192 | *data_dir = direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1193 | ||
1194 | if (req->pg_tbl) { | |
1195 | *data_len = 0; | |
1196 | for (idx = 0; idx < data_size; idx++) { | |
1197 | *data_len += be16_to_cpu( | |
1198 | req->pg_tbl[idx].segment_length); | |
1199 | } | |
1200 | } else { | |
1201 | *data_len = data_size; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | static void sbp_handle_command(struct sbp_target_request *req) | |
1206 | { | |
1207 | struct sbp_login_descriptor *login = req->login; | |
1208 | struct sbp_session *sess = login->sess; | |
1209 | int ret, unpacked_lun; | |
1210 | u32 data_length; | |
1211 | enum dma_data_direction data_dir; | |
1212 | ||
1213 | ret = sbp_fetch_command(req); | |
1214 | if (ret) { | |
1215 | pr_debug("sbp_handle_command: fetch command failed: %d\n", ret); | |
7c78b8de | 1216 | goto err; |
a511ce33 CB |
1217 | } |
1218 | ||
1219 | ret = sbp_fetch_page_table(req); | |
1220 | if (ret) { | |
1221 | pr_debug("sbp_handle_command: fetch page table failed: %d\n", | |
1222 | ret); | |
7c78b8de | 1223 | goto err; |
a511ce33 CB |
1224 | } |
1225 | ||
6bb82612 | 1226 | unpacked_lun = req->login->login_lun; |
a511ce33 CB |
1227 | sbp_calc_data_length_direction(req, &data_length, &data_dir); |
1228 | ||
1229 | pr_debug("sbp_handle_command ORB:0x%llx unpacked_lun:%d data_len:%d data_dir:%d\n", | |
1230 | req->orb_pointer, unpacked_lun, data_length, data_dir); | |
1231 | ||
649ee054 BVA |
1232 | /* only used for printk until we do TMRs */ |
1233 | req->se_cmd.tag = req->orb_pointer; | |
d6dfc868 RD |
1234 | if (target_submit_cmd(&req->se_cmd, sess->se_sess, req->cmd_buf, |
1235 | req->sense_buf, unpacked_lun, data_length, | |
5f27edad | 1236 | TCM_SIMPLE_TAG, data_dir, TARGET_SCF_ACK_KREF)) |
d6dfc868 RD |
1237 | goto err; |
1238 | ||
7c78b8de RD |
1239 | return; |
1240 | ||
1241 | err: | |
1242 | req->status.status |= cpu_to_be32( | |
1243 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1244 | STATUS_BLOCK_DEAD(0) | | |
1245 | STATUS_BLOCK_LEN(1) | | |
1246 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1247 | sbp_send_status(req); | |
a511ce33 CB |
1248 | } |
1249 | ||
1250 | /* | |
1251 | * DMA_TO_DEVICE = read from initiator (SCSI WRITE) | |
1252 | * DMA_FROM_DEVICE = write to initiator (SCSI READ) | |
1253 | */ | |
1254 | static int sbp_rw_data(struct sbp_target_request *req) | |
1255 | { | |
1256 | struct sbp_session *sess = req->login->sess; | |
1257 | int tcode, sg_miter_flags, max_payload, pg_size, speed, node_id, | |
1258 | generation, num_pte, length, tfr_length, | |
1259 | rcode = RCODE_COMPLETE; | |
1260 | struct sbp_page_table_entry *pte; | |
1261 | unsigned long long offset; | |
1262 | struct fw_card *card; | |
1263 | struct sg_mapping_iter iter; | |
1264 | ||
1265 | if (req->se_cmd.data_direction == DMA_FROM_DEVICE) { | |
1266 | tcode = TCODE_WRITE_BLOCK_REQUEST; | |
1267 | sg_miter_flags = SG_MITER_FROM_SG; | |
1268 | } else { | |
1269 | tcode = TCODE_READ_BLOCK_REQUEST; | |
1270 | sg_miter_flags = SG_MITER_TO_SG; | |
1271 | } | |
1272 | ||
1273 | max_payload = 4 << CMDBLK_ORB_MAX_PAYLOAD(be32_to_cpu(req->orb.misc)); | |
1274 | speed = CMDBLK_ORB_SPEED(be32_to_cpu(req->orb.misc)); | |
1275 | ||
1276 | pg_size = CMDBLK_ORB_PG_SIZE(be32_to_cpu(req->orb.misc)); | |
1277 | if (pg_size) { | |
1278 | pr_err("sbp_run_transaction: page size ignored\n"); | |
1279 | pg_size = 0x100 << pg_size; | |
1280 | } | |
1281 | ||
1282 | spin_lock_bh(&sess->lock); | |
1283 | card = fw_card_get(sess->card); | |
1284 | node_id = sess->node_id; | |
1285 | generation = sess->generation; | |
1286 | spin_unlock_bh(&sess->lock); | |
1287 | ||
1288 | if (req->pg_tbl) { | |
1289 | pte = req->pg_tbl; | |
1290 | num_pte = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)); | |
1291 | ||
1292 | offset = 0; | |
1293 | length = 0; | |
1294 | } else { | |
1295 | pte = NULL; | |
1296 | num_pte = 0; | |
1297 | ||
1298 | offset = sbp2_pointer_to_addr(&req->orb.data_descriptor); | |
1299 | length = req->se_cmd.data_length; | |
1300 | } | |
1301 | ||
1302 | sg_miter_start(&iter, req->se_cmd.t_data_sg, req->se_cmd.t_data_nents, | |
1303 | sg_miter_flags); | |
1304 | ||
1305 | while (length || num_pte) { | |
1306 | if (!length) { | |
1307 | offset = (u64)be16_to_cpu(pte->segment_base_hi) << 32 | | |
1308 | be32_to_cpu(pte->segment_base_lo); | |
1309 | length = be16_to_cpu(pte->segment_length); | |
1310 | ||
1311 | pte++; | |
1312 | num_pte--; | |
1313 | } | |
1314 | ||
1315 | sg_miter_next(&iter); | |
1316 | ||
1317 | tfr_length = min3(length, max_payload, (int)iter.length); | |
1318 | ||
1319 | /* FIXME: take page_size into account */ | |
1320 | ||
1321 | rcode = sbp_run_transaction(card, tcode, node_id, | |
1322 | generation, speed, | |
1323 | offset, iter.addr, tfr_length); | |
1324 | ||
1325 | if (rcode != RCODE_COMPLETE) | |
1326 | break; | |
1327 | ||
1328 | length -= tfr_length; | |
1329 | offset += tfr_length; | |
1330 | iter.consumed = tfr_length; | |
1331 | } | |
1332 | ||
1333 | sg_miter_stop(&iter); | |
1334 | fw_card_put(card); | |
1335 | ||
1336 | if (rcode == RCODE_COMPLETE) { | |
1337 | WARN_ON(length != 0); | |
1338 | return 0; | |
1339 | } else { | |
1340 | return -EIO; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | static int sbp_send_status(struct sbp_target_request *req) | |
1345 | { | |
5f27edad | 1346 | int rc, ret = 0, length; |
a511ce33 CB |
1347 | struct sbp_login_descriptor *login = req->login; |
1348 | ||
1349 | length = (((be32_to_cpu(req->status.status) >> 24) & 0x07) + 1) * 4; | |
1350 | ||
5f27edad | 1351 | rc = sbp_run_request_transaction(req, TCODE_WRITE_BLOCK_REQUEST, |
a511ce33 | 1352 | login->status_fifo_addr, &req->status, length); |
5f27edad NB |
1353 | if (rc != RCODE_COMPLETE) { |
1354 | pr_debug("sbp_send_status: write failed: 0x%x\n", rc); | |
1355 | ret = -EIO; | |
1356 | goto put_ref; | |
a511ce33 CB |
1357 | } |
1358 | ||
1359 | pr_debug("sbp_send_status: status write complete for ORB: 0x%llx\n", | |
1360 | req->orb_pointer); | |
5f27edad NB |
1361 | /* |
1362 | * Drop the extra ACK_KREF reference taken by target_submit_cmd() | |
1363 | * ahead of sbp_check_stop_free() -> transport_generic_free_cmd() | |
1364 | * final se_cmd->cmd_kref put. | |
1365 | */ | |
1366 | put_ref: | |
1367 | target_put_sess_cmd(&req->se_cmd); | |
1368 | return ret; | |
a511ce33 CB |
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 | { | |
5a3ee221 NB |
1457 | struct se_cmd *se_cmd = &req->se_cmd; |
1458 | struct se_session *se_sess = se_cmd->se_sess; | |
1459 | ||
a511ce33 CB |
1460 | kfree(req->pg_tbl); |
1461 | kfree(req->cmd_buf); | |
5a3ee221 NB |
1462 | |
1463 | percpu_ida_free(&se_sess->sess_tag_pool, se_cmd->map_tag); | |
a511ce33 CB |
1464 | } |
1465 | ||
1466 | static void sbp_mgt_agent_process(struct work_struct *work) | |
1467 | { | |
1468 | struct sbp_management_agent *agent = | |
1469 | container_of(work, struct sbp_management_agent, work); | |
1470 | struct sbp_management_request *req = agent->request; | |
1471 | int ret; | |
1472 | int status_data_len = 0; | |
1473 | ||
1474 | /* fetch the ORB from the initiator */ | |
1475 | ret = sbp_run_transaction(req->card, TCODE_READ_BLOCK_REQUEST, | |
1476 | req->node_addr, req->generation, req->speed, | |
1477 | agent->orb_offset, &req->orb, sizeof(req->orb)); | |
1478 | if (ret != RCODE_COMPLETE) { | |
1479 | pr_debug("mgt_orb fetch failed: %x\n", ret); | |
1480 | goto out; | |
1481 | } | |
1482 | ||
1483 | pr_debug("mgt_orb ptr1:0x%llx ptr2:0x%llx misc:0x%x len:0x%x status_fifo:0x%llx\n", | |
1484 | sbp2_pointer_to_addr(&req->orb.ptr1), | |
1485 | sbp2_pointer_to_addr(&req->orb.ptr2), | |
1486 | be32_to_cpu(req->orb.misc), be32_to_cpu(req->orb.length), | |
1487 | sbp2_pointer_to_addr(&req->orb.status_fifo)); | |
1488 | ||
1489 | if (!ORB_NOTIFY(be32_to_cpu(req->orb.misc)) || | |
1490 | ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc)) != 0) { | |
1491 | pr_err("mgt_orb bad request\n"); | |
1492 | goto out; | |
1493 | } | |
1494 | ||
1495 | switch (MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))) { | |
1496 | case MANAGEMENT_ORB_FUNCTION_LOGIN: | |
1497 | sbp_management_request_login(agent, req, &status_data_len); | |
1498 | break; | |
1499 | ||
1500 | case MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS: | |
1501 | sbp_management_request_query_logins(agent, req, | |
1502 | &status_data_len); | |
1503 | break; | |
1504 | ||
1505 | case MANAGEMENT_ORB_FUNCTION_RECONNECT: | |
1506 | sbp_management_request_reconnect(agent, req, &status_data_len); | |
1507 | break; | |
1508 | ||
1509 | case MANAGEMENT_ORB_FUNCTION_SET_PASSWORD: | |
1510 | pr_notice("SET PASSWORD not implemented\n"); | |
1511 | ||
1512 | req->status.status = cpu_to_be32( | |
1513 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1514 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1515 | ||
1516 | break; | |
1517 | ||
1518 | case MANAGEMENT_ORB_FUNCTION_LOGOUT: | |
1519 | sbp_management_request_logout(agent, req, &status_data_len); | |
1520 | break; | |
1521 | ||
1522 | case MANAGEMENT_ORB_FUNCTION_ABORT_TASK: | |
1523 | pr_notice("ABORT TASK not implemented\n"); | |
1524 | ||
1525 | req->status.status = cpu_to_be32( | |
1526 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1527 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1528 | ||
1529 | break; | |
1530 | ||
1531 | case MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET: | |
1532 | pr_notice("ABORT TASK SET not implemented\n"); | |
1533 | ||
1534 | req->status.status = cpu_to_be32( | |
1535 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1536 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1537 | ||
1538 | break; | |
1539 | ||
1540 | case MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET: | |
1541 | pr_notice("LOGICAL UNIT RESET not implemented\n"); | |
1542 | ||
1543 | req->status.status = cpu_to_be32( | |
1544 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1545 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1546 | ||
1547 | break; | |
1548 | ||
1549 | case MANAGEMENT_ORB_FUNCTION_TARGET_RESET: | |
1550 | pr_notice("TARGET RESET not implemented\n"); | |
1551 | ||
1552 | req->status.status = cpu_to_be32( | |
1553 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1554 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1555 | ||
1556 | break; | |
1557 | ||
1558 | default: | |
1559 | pr_notice("unknown management function 0x%x\n", | |
1560 | MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))); | |
1561 | ||
1562 | req->status.status = cpu_to_be32( | |
1563 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1564 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1565 | ||
1566 | break; | |
1567 | } | |
1568 | ||
1569 | req->status.status |= cpu_to_be32( | |
1570 | STATUS_BLOCK_SRC(1) | /* Response to ORB, next_ORB absent */ | |
1571 | STATUS_BLOCK_LEN(DIV_ROUND_UP(status_data_len, 4) + 1) | | |
1572 | STATUS_BLOCK_ORB_OFFSET_HIGH(agent->orb_offset >> 32)); | |
1573 | req->status.orb_low = cpu_to_be32(agent->orb_offset); | |
1574 | ||
1575 | /* write the status block back to the initiator */ | |
1576 | ret = sbp_run_transaction(req->card, TCODE_WRITE_BLOCK_REQUEST, | |
1577 | req->node_addr, req->generation, req->speed, | |
1578 | sbp2_pointer_to_addr(&req->orb.status_fifo), | |
1579 | &req->status, 8 + status_data_len); | |
1580 | if (ret != RCODE_COMPLETE) { | |
1581 | pr_debug("mgt_orb status write failed: %x\n", ret); | |
1582 | goto out; | |
1583 | } | |
1584 | ||
1585 | out: | |
1586 | fw_card_put(req->card); | |
1587 | kfree(req); | |
1588 | ||
1589 | spin_lock_bh(&agent->lock); | |
1590 | agent->state = MANAGEMENT_AGENT_STATE_IDLE; | |
1591 | spin_unlock_bh(&agent->lock); | |
1592 | } | |
1593 | ||
1594 | static void sbp_mgt_agent_rw(struct fw_card *card, | |
1595 | struct fw_request *request, int tcode, int destination, int source, | |
1596 | int generation, unsigned long long offset, void *data, size_t length, | |
1597 | void *callback_data) | |
1598 | { | |
1599 | struct sbp_management_agent *agent = callback_data; | |
1600 | struct sbp2_pointer *ptr = data; | |
1601 | int rcode = RCODE_ADDRESS_ERROR; | |
1602 | ||
1603 | if (!agent->tport->enable) | |
1604 | goto out; | |
1605 | ||
1606 | if ((offset != agent->handler.offset) || (length != 8)) | |
1607 | goto out; | |
1608 | ||
1609 | if (tcode == TCODE_WRITE_BLOCK_REQUEST) { | |
1610 | struct sbp_management_request *req; | |
1611 | int prev_state; | |
1612 | ||
1613 | spin_lock_bh(&agent->lock); | |
1614 | prev_state = agent->state; | |
1615 | agent->state = MANAGEMENT_AGENT_STATE_BUSY; | |
1616 | spin_unlock_bh(&agent->lock); | |
1617 | ||
1618 | if (prev_state == MANAGEMENT_AGENT_STATE_BUSY) { | |
1619 | pr_notice("ignoring management request while busy\n"); | |
1620 | rcode = RCODE_CONFLICT_ERROR; | |
1621 | goto out; | |
1622 | } | |
a511ce33 CB |
1623 | req = kzalloc(sizeof(*req), GFP_ATOMIC); |
1624 | if (!req) { | |
1625 | rcode = RCODE_CONFLICT_ERROR; | |
1626 | goto out; | |
1627 | } | |
1628 | ||
1629 | req->card = fw_card_get(card); | |
1630 | req->generation = generation; | |
1631 | req->node_addr = source; | |
1632 | req->speed = fw_get_request_speed(request); | |
1633 | ||
1634 | agent->orb_offset = sbp2_pointer_to_addr(ptr); | |
1635 | agent->request = req; | |
1636 | ||
1637 | queue_work(system_unbound_wq, &agent->work); | |
1638 | rcode = RCODE_COMPLETE; | |
1639 | } else if (tcode == TCODE_READ_BLOCK_REQUEST) { | |
1640 | addr_to_sbp2_pointer(agent->orb_offset, ptr); | |
1641 | rcode = RCODE_COMPLETE; | |
1642 | } else { | |
1643 | rcode = RCODE_TYPE_ERROR; | |
1644 | } | |
1645 | ||
1646 | out: | |
1647 | fw_send_response(card, request, rcode); | |
1648 | } | |
1649 | ||
1650 | static struct sbp_management_agent *sbp_management_agent_register( | |
1651 | struct sbp_tport *tport) | |
1652 | { | |
1653 | int ret; | |
1654 | struct sbp_management_agent *agent; | |
1655 | ||
1656 | agent = kmalloc(sizeof(*agent), GFP_KERNEL); | |
1657 | if (!agent) | |
1658 | return ERR_PTR(-ENOMEM); | |
1659 | ||
1660 | spin_lock_init(&agent->lock); | |
1661 | agent->tport = tport; | |
1662 | agent->handler.length = 0x08; | |
1663 | agent->handler.address_callback = sbp_mgt_agent_rw; | |
1664 | agent->handler.callback_data = agent; | |
1665 | agent->state = MANAGEMENT_AGENT_STATE_IDLE; | |
1666 | INIT_WORK(&agent->work, sbp_mgt_agent_process); | |
1667 | agent->orb_offset = 0; | |
1668 | agent->request = NULL; | |
1669 | ||
1670 | ret = fw_core_add_address_handler(&agent->handler, | |
1671 | &sbp_register_region); | |
1672 | if (ret < 0) { | |
1673 | kfree(agent); | |
1674 | return ERR_PTR(ret); | |
1675 | } | |
1676 | ||
1677 | return agent; | |
1678 | } | |
1679 | ||
1680 | static void sbp_management_agent_unregister(struct sbp_management_agent *agent) | |
1681 | { | |
1682 | fw_core_remove_address_handler(&agent->handler); | |
1683 | cancel_work_sync(&agent->work); | |
1684 | kfree(agent); | |
1685 | } | |
1686 | ||
1687 | static int sbp_check_true(struct se_portal_group *se_tpg) | |
1688 | { | |
1689 | return 1; | |
1690 | } | |
1691 | ||
1692 | static int sbp_check_false(struct se_portal_group *se_tpg) | |
1693 | { | |
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | static char *sbp_get_fabric_name(void) | |
1698 | { | |
1699 | return "sbp"; | |
1700 | } | |
1701 | ||
1702 | static char *sbp_get_fabric_wwn(struct se_portal_group *se_tpg) | |
1703 | { | |
1704 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1705 | struct sbp_tport *tport = tpg->tport; | |
1706 | ||
1707 | return &tport->tport_name[0]; | |
1708 | } | |
1709 | ||
1710 | static u16 sbp_get_tag(struct se_portal_group *se_tpg) | |
1711 | { | |
1712 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1713 | return tpg->tport_tpgt; | |
1714 | } | |
1715 | ||
a511ce33 CB |
1716 | static u32 sbp_tpg_get_inst_index(struct se_portal_group *se_tpg) |
1717 | { | |
1718 | return 1; | |
1719 | } | |
1720 | ||
1721 | static void sbp_release_cmd(struct se_cmd *se_cmd) | |
1722 | { | |
1723 | struct sbp_target_request *req = container_of(se_cmd, | |
1724 | struct sbp_target_request, se_cmd); | |
1725 | ||
1726 | sbp_free_request(req); | |
1727 | } | |
1728 | ||
a511ce33 CB |
1729 | static u32 sbp_sess_get_index(struct se_session *se_sess) |
1730 | { | |
1731 | return 0; | |
1732 | } | |
1733 | ||
1734 | static int sbp_write_pending(struct se_cmd *se_cmd) | |
1735 | { | |
1736 | struct sbp_target_request *req = container_of(se_cmd, | |
1737 | struct sbp_target_request, se_cmd); | |
1738 | int ret; | |
1739 | ||
1740 | ret = sbp_rw_data(req); | |
1741 | if (ret) { | |
1742 | req->status.status |= cpu_to_be32( | |
1743 | STATUS_BLOCK_RESP( | |
1744 | STATUS_RESP_TRANSPORT_FAILURE) | | |
1745 | STATUS_BLOCK_DEAD(0) | | |
1746 | STATUS_BLOCK_LEN(1) | | |
1747 | STATUS_BLOCK_SBP_STATUS( | |
1748 | SBP_STATUS_UNSPECIFIED_ERROR)); | |
1749 | sbp_send_status(req); | |
1750 | return ret; | |
1751 | } | |
1752 | ||
70baf0ab | 1753 | target_execute_cmd(se_cmd); |
a511ce33 CB |
1754 | return 0; |
1755 | } | |
1756 | ||
1757 | static int sbp_write_pending_status(struct se_cmd *se_cmd) | |
1758 | { | |
1759 | return 0; | |
1760 | } | |
1761 | ||
1762 | static void sbp_set_default_node_attrs(struct se_node_acl *nacl) | |
1763 | { | |
1764 | return; | |
1765 | } | |
1766 | ||
a511ce33 CB |
1767 | static int sbp_get_cmd_state(struct se_cmd *se_cmd) |
1768 | { | |
1769 | return 0; | |
1770 | } | |
1771 | ||
1772 | static int sbp_queue_data_in(struct se_cmd *se_cmd) | |
1773 | { | |
1774 | struct sbp_target_request *req = container_of(se_cmd, | |
1775 | struct sbp_target_request, se_cmd); | |
1776 | int ret; | |
1777 | ||
1778 | ret = sbp_rw_data(req); | |
1779 | if (ret) { | |
1780 | req->status.status |= cpu_to_be32( | |
1781 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1782 | STATUS_BLOCK_DEAD(0) | | |
1783 | STATUS_BLOCK_LEN(1) | | |
1784 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1785 | sbp_send_status(req); | |
1786 | return ret; | |
1787 | } | |
1788 | ||
1789 | return sbp_send_sense(req); | |
1790 | } | |
1791 | ||
1792 | /* | |
1793 | * Called after command (no data transfer) or after the write (to device) | |
1794 | * operation is completed | |
1795 | */ | |
1796 | static int sbp_queue_status(struct se_cmd *se_cmd) | |
1797 | { | |
1798 | struct sbp_target_request *req = container_of(se_cmd, | |
1799 | struct sbp_target_request, se_cmd); | |
1800 | ||
1801 | return sbp_send_sense(req); | |
1802 | } | |
1803 | ||
b79fafac | 1804 | static void sbp_queue_tm_rsp(struct se_cmd *se_cmd) |
a511ce33 | 1805 | { |
a511ce33 CB |
1806 | } |
1807 | ||
131e6abc NB |
1808 | static void sbp_aborted_task(struct se_cmd *se_cmd) |
1809 | { | |
1810 | return; | |
1811 | } | |
1812 | ||
a511ce33 CB |
1813 | static int sbp_check_stop_free(struct se_cmd *se_cmd) |
1814 | { | |
1815 | struct sbp_target_request *req = container_of(se_cmd, | |
1816 | struct sbp_target_request, se_cmd); | |
1817 | ||
5f27edad | 1818 | return transport_generic_free_cmd(&req->se_cmd, 0); |
a511ce33 CB |
1819 | } |
1820 | ||
a511ce33 CB |
1821 | static int sbp_count_se_tpg_luns(struct se_portal_group *tpg) |
1822 | { | |
6bb82612 NB |
1823 | struct se_lun *lun; |
1824 | int count = 0; | |
a511ce33 | 1825 | |
6bb82612 NB |
1826 | rcu_read_lock(); |
1827 | hlist_for_each_entry_rcu(lun, &tpg->tpg_lun_hlist, link) | |
a511ce33 | 1828 | count++; |
6bb82612 | 1829 | rcu_read_unlock(); |
a511ce33 CB |
1830 | |
1831 | return count; | |
1832 | } | |
1833 | ||
1834 | static int sbp_update_unit_directory(struct sbp_tport *tport) | |
1835 | { | |
6bb82612 NB |
1836 | struct se_lun *lun; |
1837 | int num_luns, num_entries, idx = 0, mgt_agt_addr, ret; | |
a511ce33 CB |
1838 | u32 *data; |
1839 | ||
1840 | if (tport->unit_directory.data) { | |
1841 | fw_core_remove_descriptor(&tport->unit_directory); | |
1842 | kfree(tport->unit_directory.data); | |
1843 | tport->unit_directory.data = NULL; | |
1844 | } | |
1845 | ||
1846 | if (!tport->enable || !tport->tpg) | |
1847 | return 0; | |
1848 | ||
1849 | num_luns = sbp_count_se_tpg_luns(&tport->tpg->se_tpg); | |
1850 | ||
1851 | /* | |
1852 | * Number of entries in the final unit directory: | |
1853 | * - all of those in the template | |
1854 | * - management_agent | |
1855 | * - unit_characteristics | |
1856 | * - reconnect_timeout | |
1857 | * - unit unique ID | |
1858 | * - one for each LUN | |
1859 | * | |
1860 | * MUST NOT include leaf or sub-directory entries | |
1861 | */ | |
1862 | num_entries = ARRAY_SIZE(sbp_unit_directory_template) + 4 + num_luns; | |
1863 | ||
1864 | if (tport->directory_id != -1) | |
1865 | num_entries++; | |
1866 | ||
1867 | /* allocate num_entries + 4 for the header and unique ID leaf */ | |
1868 | data = kcalloc((num_entries + 4), sizeof(u32), GFP_KERNEL); | |
1869 | if (!data) | |
1870 | return -ENOMEM; | |
1871 | ||
1872 | /* directory_length */ | |
1873 | data[idx++] = num_entries << 16; | |
1874 | ||
1875 | /* directory_id */ | |
1876 | if (tport->directory_id != -1) | |
1877 | data[idx++] = (CSR_DIRECTORY_ID << 24) | tport->directory_id; | |
1878 | ||
1879 | /* unit directory template */ | |
1880 | memcpy(&data[idx], sbp_unit_directory_template, | |
1881 | sizeof(sbp_unit_directory_template)); | |
1882 | idx += ARRAY_SIZE(sbp_unit_directory_template); | |
1883 | ||
1884 | /* management_agent */ | |
1885 | mgt_agt_addr = (tport->mgt_agt->handler.offset - CSR_REGISTER_BASE) / 4; | |
1886 | data[idx++] = 0x54000000 | (mgt_agt_addr & 0x00ffffff); | |
1887 | ||
1888 | /* unit_characteristics */ | |
1889 | data[idx++] = 0x3a000000 | | |
1890 | (((tport->mgt_orb_timeout * 2) << 8) & 0xff00) | | |
1891 | SBP_ORB_FETCH_SIZE; | |
1892 | ||
1893 | /* reconnect_timeout */ | |
1894 | data[idx++] = 0x3d000000 | (tport->max_reconnect_timeout & 0xffff); | |
1895 | ||
1896 | /* unit unique ID (leaf is just after LUNs) */ | |
1897 | data[idx++] = 0x8d000000 | (num_luns + 1); | |
1898 | ||
6bb82612 NB |
1899 | rcu_read_lock(); |
1900 | hlist_for_each_entry_rcu(lun, &tport->tpg->se_tpg.tpg_lun_hlist, link) { | |
a511ce33 CB |
1901 | struct se_device *dev; |
1902 | int type; | |
4cc987ea NB |
1903 | /* |
1904 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1905 | * reference to se_device->dev_group. | |
1906 | */ | |
1907 | dev = rcu_dereference_raw(lun->lun_se_dev); | |
a511ce33 CB |
1908 | type = dev->transport->get_device_type(dev); |
1909 | ||
1910 | /* logical_unit_number */ | |
1911 | data[idx++] = 0x14000000 | | |
1912 | ((type << 16) & 0x1f0000) | | |
6bb82612 | 1913 | (lun->unpacked_lun & 0xffff); |
a511ce33 | 1914 | } |
6bb82612 | 1915 | rcu_read_unlock(); |
a511ce33 CB |
1916 | |
1917 | /* unit unique ID leaf */ | |
1918 | data[idx++] = 2 << 16; | |
1919 | data[idx++] = tport->guid >> 32; | |
1920 | data[idx++] = tport->guid; | |
1921 | ||
1922 | tport->unit_directory.length = idx; | |
1923 | tport->unit_directory.key = (CSR_DIRECTORY | CSR_UNIT) << 24; | |
1924 | tport->unit_directory.data = data; | |
1925 | ||
1926 | ret = fw_core_add_descriptor(&tport->unit_directory); | |
1927 | if (ret < 0) { | |
1928 | kfree(tport->unit_directory.data); | |
1929 | tport->unit_directory.data = NULL; | |
1930 | } | |
1931 | ||
1932 | return ret; | |
1933 | } | |
1934 | ||
343d475d | 1935 | static ssize_t sbp_parse_wwn(const char *name, u64 *wwn) |
a511ce33 CB |
1936 | { |
1937 | const char *cp; | |
1938 | char c, nibble; | |
1939 | int pos = 0, err; | |
1940 | ||
1941 | *wwn = 0; | |
1942 | for (cp = name; cp < &name[SBP_NAMELEN - 1]; cp++) { | |
1943 | c = *cp; | |
1944 | if (c == '\n' && cp[1] == '\0') | |
1945 | continue; | |
1946 | if (c == '\0') { | |
1947 | err = 2; | |
1948 | if (pos != 16) | |
1949 | goto fail; | |
1950 | return cp - name; | |
1951 | } | |
1952 | err = 3; | |
1953 | if (isdigit(c)) | |
1954 | nibble = c - '0'; | |
343d475d | 1955 | else if (isxdigit(c)) |
a511ce33 CB |
1956 | nibble = tolower(c) - 'a' + 10; |
1957 | else | |
1958 | goto fail; | |
1959 | *wwn = (*wwn << 4) | nibble; | |
1960 | pos++; | |
1961 | } | |
1962 | err = 4; | |
1963 | fail: | |
1964 | printk(KERN_INFO "err %u len %zu pos %u\n", | |
1965 | err, cp - name, pos); | |
1966 | return -1; | |
1967 | } | |
1968 | ||
1969 | static ssize_t sbp_format_wwn(char *buf, size_t len, u64 wwn) | |
1970 | { | |
1971 | return snprintf(buf, len, "%016llx", wwn); | |
1972 | } | |
1973 | ||
c7d6a803 | 1974 | static int sbp_init_nodeacl(struct se_node_acl *se_nacl, const char *name) |
a511ce33 | 1975 | { |
a511ce33 | 1976 | u64 guid = 0; |
a511ce33 | 1977 | |
343d475d | 1978 | if (sbp_parse_wwn(name, &guid) < 0) |
c7d6a803 CH |
1979 | return -EINVAL; |
1980 | return 0; | |
a511ce33 CB |
1981 | } |
1982 | ||
1983 | static int sbp_post_link_lun( | |
1984 | struct se_portal_group *se_tpg, | |
1985 | struct se_lun *se_lun) | |
1986 | { | |
1987 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1988 | ||
1989 | return sbp_update_unit_directory(tpg->tport); | |
1990 | } | |
1991 | ||
1992 | static void sbp_pre_unlink_lun( | |
1993 | struct se_portal_group *se_tpg, | |
1994 | struct se_lun *se_lun) | |
1995 | { | |
1996 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1997 | struct sbp_tport *tport = tpg->tport; | |
1998 | int ret; | |
1999 | ||
2000 | if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) | |
2001 | tport->enable = 0; | |
2002 | ||
2003 | ret = sbp_update_unit_directory(tport); | |
2004 | if (ret < 0) | |
2005 | pr_err("unlink LUN: failed to update unit directory\n"); | |
2006 | } | |
2007 | ||
2008 | static struct se_portal_group *sbp_make_tpg( | |
2009 | struct se_wwn *wwn, | |
2010 | struct config_group *group, | |
2011 | const char *name) | |
2012 | { | |
2013 | struct sbp_tport *tport = | |
2014 | container_of(wwn, struct sbp_tport, tport_wwn); | |
2015 | ||
2016 | struct sbp_tpg *tpg; | |
2017 | unsigned long tpgt; | |
2018 | int ret; | |
2019 | ||
2020 | if (strstr(name, "tpgt_") != name) | |
2021 | return ERR_PTR(-EINVAL); | |
2022 | if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX) | |
2023 | return ERR_PTR(-EINVAL); | |
2024 | ||
2025 | if (tport->tpg) { | |
2026 | pr_err("Only one TPG per Unit is possible.\n"); | |
2027 | return ERR_PTR(-EBUSY); | |
2028 | } | |
2029 | ||
2030 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); | |
2031 | if (!tpg) { | |
2032 | pr_err("Unable to allocate struct sbp_tpg\n"); | |
2033 | return ERR_PTR(-ENOMEM); | |
2034 | } | |
2035 | ||
2036 | tpg->tport = tport; | |
2037 | tpg->tport_tpgt = tpgt; | |
2038 | tport->tpg = tpg; | |
2039 | ||
2040 | /* default attribute values */ | |
2041 | tport->enable = 0; | |
2042 | tport->directory_id = -1; | |
2043 | tport->mgt_orb_timeout = 15; | |
2044 | tport->max_reconnect_timeout = 5; | |
2045 | tport->max_logins_per_lun = 1; | |
2046 | ||
2047 | tport->mgt_agt = sbp_management_agent_register(tport); | |
2048 | if (IS_ERR(tport->mgt_agt)) { | |
2049 | ret = PTR_ERR(tport->mgt_agt); | |
e1fe2060 | 2050 | goto out_free_tpg; |
a511ce33 CB |
2051 | } |
2052 | ||
bc0c94b1 | 2053 | ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_SBP); |
e1fe2060 CB |
2054 | if (ret < 0) |
2055 | goto out_unreg_mgt_agt; | |
a511ce33 CB |
2056 | |
2057 | return &tpg->se_tpg; | |
e1fe2060 CB |
2058 | |
2059 | out_unreg_mgt_agt: | |
2060 | sbp_management_agent_unregister(tport->mgt_agt); | |
2061 | out_free_tpg: | |
2062 | tport->tpg = NULL; | |
2063 | kfree(tpg); | |
2064 | return ERR_PTR(ret); | |
a511ce33 CB |
2065 | } |
2066 | ||
2067 | static void sbp_drop_tpg(struct se_portal_group *se_tpg) | |
2068 | { | |
2069 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2070 | struct sbp_tport *tport = tpg->tport; | |
2071 | ||
2072 | core_tpg_deregister(se_tpg); | |
2073 | sbp_management_agent_unregister(tport->mgt_agt); | |
2074 | tport->tpg = NULL; | |
2075 | kfree(tpg); | |
2076 | } | |
2077 | ||
2078 | static struct se_wwn *sbp_make_tport( | |
2079 | struct target_fabric_configfs *tf, | |
2080 | struct config_group *group, | |
2081 | const char *name) | |
2082 | { | |
2083 | struct sbp_tport *tport; | |
2084 | u64 guid = 0; | |
2085 | ||
343d475d | 2086 | if (sbp_parse_wwn(name, &guid) < 0) |
a511ce33 CB |
2087 | return ERR_PTR(-EINVAL); |
2088 | ||
2089 | tport = kzalloc(sizeof(*tport), GFP_KERNEL); | |
2090 | if (!tport) { | |
2091 | pr_err("Unable to allocate struct sbp_tport\n"); | |
2092 | return ERR_PTR(-ENOMEM); | |
2093 | } | |
2094 | ||
2095 | tport->guid = guid; | |
2096 | sbp_format_wwn(tport->tport_name, SBP_NAMELEN, guid); | |
2097 | ||
2098 | return &tport->tport_wwn; | |
2099 | } | |
2100 | ||
2101 | static void sbp_drop_tport(struct se_wwn *wwn) | |
2102 | { | |
2103 | struct sbp_tport *tport = | |
2104 | container_of(wwn, struct sbp_tport, tport_wwn); | |
2105 | ||
2106 | kfree(tport); | |
2107 | } | |
2108 | ||
2eafd729 | 2109 | static ssize_t sbp_wwn_version_show(struct config_item *item, char *page) |
a511ce33 CB |
2110 | { |
2111 | return sprintf(page, "FireWire SBP fabric module %s\n", SBP_VERSION); | |
2112 | } | |
2113 | ||
2eafd729 | 2114 | CONFIGFS_ATTR_RO(sbp_wwn_, version); |
a511ce33 CB |
2115 | |
2116 | static struct configfs_attribute *sbp_wwn_attrs[] = { | |
2eafd729 | 2117 | &sbp_wwn_attr_version, |
a511ce33 CB |
2118 | NULL, |
2119 | }; | |
2120 | ||
2eafd729 | 2121 | static ssize_t sbp_tpg_directory_id_show(struct config_item *item, char *page) |
a511ce33 | 2122 | { |
2eafd729 | 2123 | struct se_portal_group *se_tpg = to_tpg(item); |
a511ce33 CB |
2124 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2125 | struct sbp_tport *tport = tpg->tport; | |
2126 | ||
2127 | if (tport->directory_id == -1) | |
2128 | return sprintf(page, "implicit\n"); | |
2129 | else | |
2130 | return sprintf(page, "%06x\n", tport->directory_id); | |
2131 | } | |
2132 | ||
2eafd729 CH |
2133 | static ssize_t sbp_tpg_directory_id_store(struct config_item *item, |
2134 | const char *page, size_t count) | |
a511ce33 | 2135 | { |
2eafd729 | 2136 | struct se_portal_group *se_tpg = to_tpg(item); |
a511ce33 CB |
2137 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2138 | struct sbp_tport *tport = tpg->tport; | |
2139 | unsigned long val; | |
2140 | ||
2141 | if (tport->enable) { | |
2142 | pr_err("Cannot change the directory_id on an active target.\n"); | |
2143 | return -EBUSY; | |
2144 | } | |
2145 | ||
2146 | if (strstr(page, "implicit") == page) { | |
2147 | tport->directory_id = -1; | |
2148 | } else { | |
2149 | if (kstrtoul(page, 16, &val) < 0) | |
2150 | return -EINVAL; | |
2151 | if (val > 0xffffff) | |
2152 | return -EINVAL; | |
2153 | ||
2154 | tport->directory_id = val; | |
2155 | } | |
2156 | ||
2157 | return count; | |
2158 | } | |
2159 | ||
2eafd729 | 2160 | static ssize_t sbp_tpg_enable_show(struct config_item *item, char *page) |
a511ce33 | 2161 | { |
2eafd729 | 2162 | struct se_portal_group *se_tpg = to_tpg(item); |
a511ce33 CB |
2163 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2164 | struct sbp_tport *tport = tpg->tport; | |
2165 | return sprintf(page, "%d\n", tport->enable); | |
2166 | } | |
2167 | ||
2eafd729 CH |
2168 | static ssize_t sbp_tpg_enable_store(struct config_item *item, |
2169 | const char *page, size_t count) | |
a511ce33 | 2170 | { |
2eafd729 | 2171 | struct se_portal_group *se_tpg = to_tpg(item); |
a511ce33 CB |
2172 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2173 | struct sbp_tport *tport = tpg->tport; | |
2174 | unsigned long val; | |
2175 | int ret; | |
2176 | ||
2177 | if (kstrtoul(page, 0, &val) < 0) | |
2178 | return -EINVAL; | |
2179 | if ((val != 0) && (val != 1)) | |
2180 | return -EINVAL; | |
2181 | ||
2182 | if (tport->enable == val) | |
2183 | return count; | |
2184 | ||
2185 | if (val) { | |
2186 | if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) { | |
2187 | pr_err("Cannot enable a target with no LUNs!\n"); | |
2188 | return -EINVAL; | |
2189 | } | |
2190 | } else { | |
2191 | /* XXX: force-shutdown sessions instead? */ | |
2192 | spin_lock_bh(&se_tpg->session_lock); | |
2193 | if (!list_empty(&se_tpg->tpg_sess_list)) { | |
2194 | spin_unlock_bh(&se_tpg->session_lock); | |
2195 | return -EBUSY; | |
2196 | } | |
2197 | spin_unlock_bh(&se_tpg->session_lock); | |
2198 | } | |
2199 | ||
2200 | tport->enable = val; | |
2201 | ||
2202 | ret = sbp_update_unit_directory(tport); | |
2203 | if (ret < 0) { | |
2204 | pr_err("Could not update Config ROM\n"); | |
2205 | return ret; | |
2206 | } | |
2207 | ||
2208 | return count; | |
2209 | } | |
2210 | ||
2eafd729 CH |
2211 | CONFIGFS_ATTR(sbp_tpg_, directory_id); |
2212 | CONFIGFS_ATTR(sbp_tpg_, enable); | |
a511ce33 CB |
2213 | |
2214 | static struct configfs_attribute *sbp_tpg_base_attrs[] = { | |
2eafd729 CH |
2215 | &sbp_tpg_attr_directory_id, |
2216 | &sbp_tpg_attr_enable, | |
a511ce33 CB |
2217 | NULL, |
2218 | }; | |
2219 | ||
2eafd729 | 2220 | static ssize_t sbp_tpg_attrib_mgt_orb_timeout_show(struct config_item *item, |
a511ce33 CB |
2221 | char *page) |
2222 | { | |
2eafd729 | 2223 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2224 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2225 | struct sbp_tport *tport = tpg->tport; | |
2226 | return sprintf(page, "%d\n", tport->mgt_orb_timeout); | |
2227 | } | |
2228 | ||
2eafd729 CH |
2229 | static ssize_t sbp_tpg_attrib_mgt_orb_timeout_store(struct config_item *item, |
2230 | const char *page, size_t count) | |
a511ce33 | 2231 | { |
2eafd729 | 2232 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2233 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2234 | struct sbp_tport *tport = tpg->tport; | |
2235 | unsigned long val; | |
2236 | int ret; | |
2237 | ||
2238 | if (kstrtoul(page, 0, &val) < 0) | |
2239 | return -EINVAL; | |
2240 | if ((val < 1) || (val > 127)) | |
2241 | return -EINVAL; | |
2242 | ||
2243 | if (tport->mgt_orb_timeout == val) | |
2244 | return count; | |
2245 | ||
2246 | tport->mgt_orb_timeout = val; | |
2247 | ||
2248 | ret = sbp_update_unit_directory(tport); | |
2249 | if (ret < 0) | |
2250 | return ret; | |
2251 | ||
2252 | return count; | |
2253 | } | |
2254 | ||
2eafd729 | 2255 | static ssize_t sbp_tpg_attrib_max_reconnect_timeout_show(struct config_item *item, |
a511ce33 CB |
2256 | char *page) |
2257 | { | |
2eafd729 | 2258 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2259 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2260 | struct sbp_tport *tport = tpg->tport; | |
2261 | return sprintf(page, "%d\n", tport->max_reconnect_timeout); | |
2262 | } | |
2263 | ||
2eafd729 CH |
2264 | static ssize_t sbp_tpg_attrib_max_reconnect_timeout_store(struct config_item *item, |
2265 | const char *page, size_t count) | |
a511ce33 | 2266 | { |
2eafd729 | 2267 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2268 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2269 | struct sbp_tport *tport = tpg->tport; | |
2270 | unsigned long val; | |
2271 | int ret; | |
2272 | ||
2273 | if (kstrtoul(page, 0, &val) < 0) | |
2274 | return -EINVAL; | |
2275 | if ((val < 1) || (val > 32767)) | |
2276 | return -EINVAL; | |
2277 | ||
2278 | if (tport->max_reconnect_timeout == val) | |
2279 | return count; | |
2280 | ||
2281 | tport->max_reconnect_timeout = val; | |
2282 | ||
2283 | ret = sbp_update_unit_directory(tport); | |
2284 | if (ret < 0) | |
2285 | return ret; | |
2286 | ||
2287 | return count; | |
2288 | } | |
2289 | ||
2eafd729 | 2290 | static ssize_t sbp_tpg_attrib_max_logins_per_lun_show(struct config_item *item, |
a511ce33 CB |
2291 | char *page) |
2292 | { | |
2eafd729 | 2293 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2294 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2295 | struct sbp_tport *tport = tpg->tport; | |
2296 | return sprintf(page, "%d\n", tport->max_logins_per_lun); | |
2297 | } | |
2298 | ||
2eafd729 CH |
2299 | static ssize_t sbp_tpg_attrib_max_logins_per_lun_store(struct config_item *item, |
2300 | const char *page, size_t count) | |
a511ce33 | 2301 | { |
2eafd729 | 2302 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2303 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2304 | struct sbp_tport *tport = tpg->tport; | |
2305 | unsigned long val; | |
2306 | ||
2307 | if (kstrtoul(page, 0, &val) < 0) | |
2308 | return -EINVAL; | |
2309 | if ((val < 1) || (val > 127)) | |
2310 | return -EINVAL; | |
2311 | ||
2312 | /* XXX: also check against current count? */ | |
2313 | ||
2314 | tport->max_logins_per_lun = val; | |
2315 | ||
2316 | return count; | |
2317 | } | |
2318 | ||
2eafd729 CH |
2319 | CONFIGFS_ATTR(sbp_tpg_attrib_, mgt_orb_timeout); |
2320 | CONFIGFS_ATTR(sbp_tpg_attrib_, max_reconnect_timeout); | |
2321 | CONFIGFS_ATTR(sbp_tpg_attrib_, max_logins_per_lun); | |
a511ce33 CB |
2322 | |
2323 | static struct configfs_attribute *sbp_tpg_attrib_attrs[] = { | |
2eafd729 CH |
2324 | &sbp_tpg_attrib_attr_mgt_orb_timeout, |
2325 | &sbp_tpg_attrib_attr_max_reconnect_timeout, | |
2326 | &sbp_tpg_attrib_attr_max_logins_per_lun, | |
a511ce33 CB |
2327 | NULL, |
2328 | }; | |
2329 | ||
9ac8928e CH |
2330 | static const struct target_core_fabric_ops sbp_ops = { |
2331 | .module = THIS_MODULE, | |
2332 | .name = "sbp", | |
a511ce33 | 2333 | .get_fabric_name = sbp_get_fabric_name, |
a511ce33 CB |
2334 | .tpg_get_wwn = sbp_get_fabric_wwn, |
2335 | .tpg_get_tag = sbp_get_tag, | |
a511ce33 CB |
2336 | .tpg_check_demo_mode = sbp_check_true, |
2337 | .tpg_check_demo_mode_cache = sbp_check_true, | |
2338 | .tpg_check_demo_mode_write_protect = sbp_check_false, | |
2339 | .tpg_check_prod_mode_write_protect = sbp_check_false, | |
a511ce33 CB |
2340 | .tpg_get_inst_index = sbp_tpg_get_inst_index, |
2341 | .release_cmd = sbp_release_cmd, | |
a511ce33 CB |
2342 | .sess_get_index = sbp_sess_get_index, |
2343 | .write_pending = sbp_write_pending, | |
2344 | .write_pending_status = sbp_write_pending_status, | |
2345 | .set_default_node_attributes = sbp_set_default_node_attrs, | |
a511ce33 CB |
2346 | .get_cmd_state = sbp_get_cmd_state, |
2347 | .queue_data_in = sbp_queue_data_in, | |
2348 | .queue_status = sbp_queue_status, | |
2349 | .queue_tm_rsp = sbp_queue_tm_rsp, | |
131e6abc | 2350 | .aborted_task = sbp_aborted_task, |
a511ce33 CB |
2351 | .check_stop_free = sbp_check_stop_free, |
2352 | ||
2353 | .fabric_make_wwn = sbp_make_tport, | |
2354 | .fabric_drop_wwn = sbp_drop_tport, | |
2355 | .fabric_make_tpg = sbp_make_tpg, | |
2356 | .fabric_drop_tpg = sbp_drop_tpg, | |
2357 | .fabric_post_link = sbp_post_link_lun, | |
2358 | .fabric_pre_unlink = sbp_pre_unlink_lun, | |
2359 | .fabric_make_np = NULL, | |
2360 | .fabric_drop_np = NULL, | |
c7d6a803 | 2361 | .fabric_init_nodeacl = sbp_init_nodeacl, |
a511ce33 | 2362 | |
9ac8928e CH |
2363 | .tfc_wwn_attrs = sbp_wwn_attrs, |
2364 | .tfc_tpg_base_attrs = sbp_tpg_base_attrs, | |
2365 | .tfc_tpg_attrib_attrs = sbp_tpg_attrib_attrs, | |
a511ce33 CB |
2366 | }; |
2367 | ||
2368 | static int __init sbp_init(void) | |
2369 | { | |
9ac8928e | 2370 | return target_register_template(&sbp_ops); |
a511ce33 CB |
2371 | }; |
2372 | ||
63b91d5a | 2373 | static void __exit sbp_exit(void) |
a511ce33 | 2374 | { |
9ac8928e | 2375 | target_unregister_template(&sbp_ops); |
a511ce33 CB |
2376 | }; |
2377 | ||
2378 | MODULE_DESCRIPTION("FireWire SBP fabric driver"); | |
2379 | MODULE_LICENSE("GPL"); | |
2380 | module_init(sbp_init); | |
2381 | module_exit(sbp_exit); |