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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
a511ce33 CB |
2 | /* |
3 | * SBP2 target driver (SCSI over IEEE1394 in target mode) | |
4 | * | |
5 | * Copyright (C) 2011 Chris Boot <bootc@bootc.net> | |
a511ce33 CB |
6 | */ |
7 | ||
8 | #define KMSG_COMPONENT "sbp_target" | |
9 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/configfs.h> | |
17 | #include <linux/ctype.h> | |
4323e65b | 18 | #include <linux/delay.h> |
a511ce33 CB |
19 | #include <linux/firewire.h> |
20 | #include <linux/firewire-constants.h> | |
ba929992 | 21 | #include <scsi/scsi_proto.h> |
a511ce33 CB |
22 | #include <scsi/scsi_tcq.h> |
23 | #include <target/target_core_base.h> | |
24 | #include <target/target_core_backend.h> | |
25 | #include <target/target_core_fabric.h> | |
a511ce33 CB |
26 | #include <asm/unaligned.h> |
27 | ||
28 | #include "sbp_target.h" | |
29 | ||
a511ce33 CB |
30 | /* FireWire address region for management and command block address handlers */ |
31 | static const struct fw_address_region sbp_register_region = { | |
32 | .start = CSR_REGISTER_BASE + 0x10000, | |
33 | .end = 0x1000000000000ULL, | |
34 | }; | |
35 | ||
36 | static const u32 sbp_unit_directory_template[] = { | |
37 | 0x1200609e, /* unit_specifier_id: NCITS/T10 */ | |
38 | 0x13010483, /* unit_sw_version: 1155D Rev 4 */ | |
39 | 0x3800609e, /* command_set_specifier_id: NCITS/T10 */ | |
40 | 0x390104d8, /* command_set: SPC-2 */ | |
41 | 0x3b000000, /* command_set_revision: 0 */ | |
42 | 0x3c000001, /* firmware_revision: 1 */ | |
43 | }; | |
44 | ||
45 | #define SESSION_MAINTENANCE_INTERVAL HZ | |
46 | ||
47 | static atomic_t login_id = ATOMIC_INIT(0); | |
48 | ||
49 | static void session_maintenance_work(struct work_struct *); | |
50 | static int sbp_run_transaction(struct fw_card *, int, int, int, int, | |
51 | unsigned long long, void *, size_t); | |
52 | ||
53 | static int read_peer_guid(u64 *guid, const struct sbp_management_request *req) | |
54 | { | |
55 | int ret; | |
56 | __be32 high, low; | |
57 | ||
58 | ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST, | |
59 | req->node_addr, req->generation, req->speed, | |
60 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 3 * 4, | |
61 | &high, sizeof(high)); | |
62 | if (ret != RCODE_COMPLETE) | |
63 | return ret; | |
64 | ||
65 | ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST, | |
66 | req->node_addr, req->generation, req->speed, | |
67 | (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 4 * 4, | |
68 | &low, sizeof(low)); | |
69 | if (ret != RCODE_COMPLETE) | |
70 | return ret; | |
71 | ||
72 | *guid = (u64)be32_to_cpu(high) << 32 | be32_to_cpu(low); | |
73 | ||
74 | return RCODE_COMPLETE; | |
75 | } | |
76 | ||
77 | static struct sbp_session *sbp_session_find_by_guid( | |
78 | struct sbp_tpg *tpg, u64 guid) | |
79 | { | |
80 | struct se_session *se_sess; | |
81 | struct sbp_session *sess, *found = NULL; | |
82 | ||
83 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
84 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
85 | sess = se_sess->fabric_sess_ptr; | |
86 | if (sess->guid == guid) | |
87 | found = sess; | |
88 | } | |
89 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
90 | ||
91 | return found; | |
92 | } | |
93 | ||
94 | static struct sbp_login_descriptor *sbp_login_find_by_lun( | |
6bb82612 | 95 | struct sbp_session *session, u32 unpacked_lun) |
a511ce33 CB |
96 | { |
97 | struct sbp_login_descriptor *login, *found = NULL; | |
98 | ||
99 | spin_lock_bh(&session->lock); | |
100 | list_for_each_entry(login, &session->login_list, link) { | |
6bb82612 | 101 | if (login->login_lun == unpacked_lun) |
a511ce33 CB |
102 | found = login; |
103 | } | |
104 | spin_unlock_bh(&session->lock); | |
105 | ||
106 | return found; | |
107 | } | |
108 | ||
109 | static int sbp_login_count_all_by_lun( | |
110 | struct sbp_tpg *tpg, | |
6bb82612 | 111 | u32 unpacked_lun, |
a511ce33 CB |
112 | int exclusive) |
113 | { | |
114 | struct se_session *se_sess; | |
115 | struct sbp_session *sess; | |
116 | struct sbp_login_descriptor *login; | |
117 | int count = 0; | |
118 | ||
119 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
120 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
121 | sess = se_sess->fabric_sess_ptr; | |
122 | ||
123 | spin_lock_bh(&sess->lock); | |
124 | list_for_each_entry(login, &sess->login_list, link) { | |
6bb82612 | 125 | if (login->login_lun != unpacked_lun) |
a511ce33 CB |
126 | continue; |
127 | ||
128 | if (!exclusive || login->exclusive) | |
129 | count++; | |
130 | } | |
131 | spin_unlock_bh(&sess->lock); | |
132 | } | |
133 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
134 | ||
135 | return count; | |
136 | } | |
137 | ||
138 | static struct sbp_login_descriptor *sbp_login_find_by_id( | |
139 | struct sbp_tpg *tpg, int login_id) | |
140 | { | |
141 | struct se_session *se_sess; | |
142 | struct sbp_session *sess; | |
143 | struct sbp_login_descriptor *login, *found = NULL; | |
144 | ||
145 | spin_lock_bh(&tpg->se_tpg.session_lock); | |
146 | list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) { | |
147 | sess = se_sess->fabric_sess_ptr; | |
148 | ||
149 | spin_lock_bh(&sess->lock); | |
150 | list_for_each_entry(login, &sess->login_list, link) { | |
151 | if (login->login_id == login_id) | |
152 | found = login; | |
153 | } | |
154 | spin_unlock_bh(&sess->lock); | |
155 | } | |
156 | spin_unlock_bh(&tpg->se_tpg.session_lock); | |
157 | ||
158 | return found; | |
159 | } | |
160 | ||
6bb82612 | 161 | static u32 sbp_get_lun_from_tpg(struct sbp_tpg *tpg, u32 login_lun, int *err) |
a511ce33 CB |
162 | { |
163 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
164 | struct se_lun *se_lun; | |
165 | ||
6bb82612 NB |
166 | rcu_read_lock(); |
167 | hlist_for_each_entry_rcu(se_lun, &se_tpg->tpg_lun_hlist, link) { | |
168 | if (se_lun->unpacked_lun == login_lun) { | |
169 | rcu_read_unlock(); | |
170 | *err = 0; | |
171 | return login_lun; | |
172 | } | |
173 | } | |
174 | rcu_read_unlock(); | |
a511ce33 | 175 | |
6bb82612 NB |
176 | *err = -ENODEV; |
177 | return login_lun; | |
a511ce33 CB |
178 | } |
179 | ||
180 | static struct sbp_session *sbp_session_create( | |
181 | struct sbp_tpg *tpg, | |
182 | u64 guid) | |
183 | { | |
184 | struct sbp_session *sess; | |
185 | int ret; | |
186 | char guid_str[17]; | |
fb444abe CH |
187 | |
188 | snprintf(guid_str, sizeof(guid_str), "%016llx", guid); | |
a511ce33 CB |
189 | |
190 | sess = kmalloc(sizeof(*sess), GFP_KERNEL); | |
e0f3d4c2 | 191 | if (!sess) |
a511ce33 | 192 | return ERR_PTR(-ENOMEM); |
e0f3d4c2 | 193 | |
fb444abe CH |
194 | spin_lock_init(&sess->lock); |
195 | INIT_LIST_HEAD(&sess->login_list); | |
196 | INIT_DELAYED_WORK(&sess->maint_work, session_maintenance_work); | |
197 | sess->guid = guid; | |
a511ce33 | 198 | |
fa834287 | 199 | sess->se_sess = target_setup_session(&tpg->se_tpg, 128, |
5a3ee221 NB |
200 | sizeof(struct sbp_target_request), |
201 | TARGET_PROT_NORMAL, guid_str, | |
202 | sess, NULL); | |
a511ce33 CB |
203 | if (IS_ERR(sess->se_sess)) { |
204 | pr_err("failed to init se_session\n"); | |
a511ce33 CB |
205 | ret = PTR_ERR(sess->se_sess); |
206 | kfree(sess); | |
207 | return ERR_PTR(ret); | |
208 | } | |
209 | ||
a511ce33 CB |
210 | return sess; |
211 | } | |
212 | ||
213 | static void sbp_session_release(struct sbp_session *sess, bool cancel_work) | |
214 | { | |
215 | spin_lock_bh(&sess->lock); | |
216 | if (!list_empty(&sess->login_list)) { | |
217 | spin_unlock_bh(&sess->lock); | |
218 | return; | |
219 | } | |
220 | spin_unlock_bh(&sess->lock); | |
221 | ||
222 | if (cancel_work) | |
223 | cancel_delayed_work_sync(&sess->maint_work); | |
224 | ||
b287e351 | 225 | target_remove_session(sess->se_sess); |
a511ce33 CB |
226 | |
227 | if (sess->card) | |
228 | fw_card_put(sess->card); | |
229 | ||
230 | kfree(sess); | |
231 | } | |
232 | ||
233 | static void sbp_target_agent_unregister(struct sbp_target_agent *); | |
234 | ||
235 | static void sbp_login_release(struct sbp_login_descriptor *login, | |
236 | bool cancel_work) | |
237 | { | |
238 | struct sbp_session *sess = login->sess; | |
239 | ||
240 | /* FIXME: abort/wait on tasks */ | |
241 | ||
242 | sbp_target_agent_unregister(login->tgt_agt); | |
243 | ||
244 | if (sess) { | |
245 | spin_lock_bh(&sess->lock); | |
246 | list_del(&login->link); | |
247 | spin_unlock_bh(&sess->lock); | |
248 | ||
249 | sbp_session_release(sess, cancel_work); | |
250 | } | |
251 | ||
252 | kfree(login); | |
253 | } | |
254 | ||
255 | static struct sbp_target_agent *sbp_target_agent_register( | |
256 | struct sbp_login_descriptor *); | |
257 | ||
258 | static void sbp_management_request_login( | |
259 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
260 | int *status_data_size) | |
261 | { | |
262 | struct sbp_tport *tport = agent->tport; | |
263 | struct sbp_tpg *tpg = tport->tpg; | |
a511ce33 CB |
264 | struct sbp_session *sess; |
265 | struct sbp_login_descriptor *login; | |
266 | struct sbp_login_response_block *response; | |
6bb82612 NB |
267 | u64 guid; |
268 | u32 unpacked_lun; | |
269 | int login_response_len, ret; | |
a511ce33 | 270 | |
6bb82612 NB |
271 | unpacked_lun = sbp_get_lun_from_tpg(tpg, |
272 | LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc)), &ret); | |
273 | if (ret) { | |
a511ce33 CB |
274 | pr_notice("login to unknown LUN: %d\n", |
275 | LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc))); | |
276 | ||
277 | req->status.status = cpu_to_be32( | |
278 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
279 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LUN_NOTSUPP)); | |
280 | return; | |
281 | } | |
282 | ||
283 | ret = read_peer_guid(&guid, req); | |
284 | if (ret != RCODE_COMPLETE) { | |
285 | pr_warn("failed to read peer GUID: %d\n", ret); | |
286 | ||
287 | req->status.status = cpu_to_be32( | |
288 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
289 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
290 | return; | |
291 | } | |
292 | ||
293 | pr_notice("mgt_agent LOGIN to LUN %d from %016llx\n", | |
6bb82612 | 294 | unpacked_lun, guid); |
a511ce33 CB |
295 | |
296 | sess = sbp_session_find_by_guid(tpg, guid); | |
297 | if (sess) { | |
6bb82612 | 298 | login = sbp_login_find_by_lun(sess, unpacked_lun); |
a511ce33 CB |
299 | if (login) { |
300 | pr_notice("initiator already logged-in\n"); | |
301 | ||
302 | /* | |
303 | * SBP-2 R4 says we should return access denied, but | |
304 | * that can confuse initiators. Instead we need to | |
305 | * treat this like a reconnect, but send the login | |
306 | * response block like a fresh login. | |
307 | * | |
308 | * This is required particularly in the case of Apple | |
309 | * devices booting off the FireWire target, where | |
310 | * the firmware has an active login to the target. When | |
311 | * the OS takes control of the session it issues its own | |
312 | * LOGIN rather than a RECONNECT. To avoid the machine | |
313 | * waiting until the reconnect_hold expires, we can skip | |
314 | * the ACCESS_DENIED errors to speed things up. | |
315 | */ | |
316 | ||
317 | goto already_logged_in; | |
318 | } | |
319 | } | |
320 | ||
321 | /* | |
322 | * check exclusive bit in login request | |
323 | * reject with access_denied if any logins present | |
324 | */ | |
325 | if (LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)) && | |
6bb82612 | 326 | sbp_login_count_all_by_lun(tpg, unpacked_lun, 0)) { |
a511ce33 CB |
327 | pr_warn("refusing exclusive login with other active logins\n"); |
328 | ||
329 | req->status.status = cpu_to_be32( | |
330 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
331 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
332 | return; | |
333 | } | |
334 | ||
335 | /* | |
336 | * check exclusive bit in any existing login descriptor | |
337 | * reject with access_denied if any exclusive logins present | |
338 | */ | |
6bb82612 | 339 | if (sbp_login_count_all_by_lun(tpg, unpacked_lun, 1)) { |
a511ce33 CB |
340 | pr_warn("refusing login while another exclusive login present\n"); |
341 | ||
342 | req->status.status = cpu_to_be32( | |
343 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
344 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
345 | return; | |
346 | } | |
347 | ||
348 | /* | |
349 | * check we haven't exceeded the number of allowed logins | |
350 | * reject with resources_unavailable if we have | |
351 | */ | |
6bb82612 | 352 | if (sbp_login_count_all_by_lun(tpg, unpacked_lun, 0) >= |
a511ce33 CB |
353 | tport->max_logins_per_lun) { |
354 | pr_warn("max number of logins reached\n"); | |
355 | ||
356 | req->status.status = cpu_to_be32( | |
357 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
358 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
359 | return; | |
360 | } | |
361 | ||
362 | if (!sess) { | |
363 | sess = sbp_session_create(tpg, guid); | |
364 | if (IS_ERR(sess)) { | |
365 | switch (PTR_ERR(sess)) { | |
366 | case -EPERM: | |
367 | ret = SBP_STATUS_ACCESS_DENIED; | |
368 | break; | |
369 | default: | |
370 | ret = SBP_STATUS_RESOURCES_UNAVAIL; | |
371 | break; | |
372 | } | |
373 | ||
374 | req->status.status = cpu_to_be32( | |
375 | STATUS_BLOCK_RESP( | |
376 | STATUS_RESP_REQUEST_COMPLETE) | | |
377 | STATUS_BLOCK_SBP_STATUS(ret)); | |
378 | return; | |
379 | } | |
380 | ||
381 | sess->node_id = req->node_addr; | |
382 | sess->card = fw_card_get(req->card); | |
383 | sess->generation = req->generation; | |
384 | sess->speed = req->speed; | |
385 | ||
386 | schedule_delayed_work(&sess->maint_work, | |
387 | SESSION_MAINTENANCE_INTERVAL); | |
388 | } | |
389 | ||
390 | /* only take the latest reconnect_hold into account */ | |
391 | sess->reconnect_hold = min( | |
392 | 1 << LOGIN_ORB_RECONNECT(be32_to_cpu(req->orb.misc)), | |
393 | tport->max_reconnect_timeout) - 1; | |
394 | ||
395 | login = kmalloc(sizeof(*login), GFP_KERNEL); | |
396 | if (!login) { | |
397 | pr_err("failed to allocate login descriptor\n"); | |
398 | ||
399 | sbp_session_release(sess, true); | |
400 | ||
401 | req->status.status = cpu_to_be32( | |
402 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
403 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
404 | return; | |
405 | } | |
406 | ||
407 | login->sess = sess; | |
6bb82612 | 408 | login->login_lun = unpacked_lun; |
a511ce33 CB |
409 | login->status_fifo_addr = sbp2_pointer_to_addr(&req->orb.status_fifo); |
410 | login->exclusive = LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)); | |
411 | login->login_id = atomic_inc_return(&login_id); | |
412 | ||
413 | login->tgt_agt = sbp_target_agent_register(login); | |
414 | if (IS_ERR(login->tgt_agt)) { | |
415 | ret = PTR_ERR(login->tgt_agt); | |
416 | pr_err("failed to map command block handler: %d\n", ret); | |
417 | ||
418 | sbp_session_release(sess, true); | |
419 | kfree(login); | |
420 | ||
421 | req->status.status = cpu_to_be32( | |
422 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
423 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
424 | return; | |
425 | } | |
426 | ||
427 | spin_lock_bh(&sess->lock); | |
428 | list_add_tail(&login->link, &sess->login_list); | |
429 | spin_unlock_bh(&sess->lock); | |
430 | ||
431 | already_logged_in: | |
432 | response = kzalloc(sizeof(*response), GFP_KERNEL); | |
433 | if (!response) { | |
434 | pr_err("failed to allocate login response block\n"); | |
435 | ||
436 | sbp_login_release(login, true); | |
437 | ||
438 | req->status.status = cpu_to_be32( | |
439 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
440 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL)); | |
441 | return; | |
442 | } | |
443 | ||
444 | login_response_len = clamp_val( | |
445 | LOGIN_ORB_RESPONSE_LENGTH(be32_to_cpu(req->orb.length)), | |
446 | 12, sizeof(*response)); | |
447 | response->misc = cpu_to_be32( | |
448 | ((login_response_len & 0xffff) << 16) | | |
449 | (login->login_id & 0xffff)); | |
450 | response->reconnect_hold = cpu_to_be32(sess->reconnect_hold & 0xffff); | |
451 | addr_to_sbp2_pointer(login->tgt_agt->handler.offset, | |
452 | &response->command_block_agent); | |
453 | ||
454 | ret = sbp_run_transaction(sess->card, TCODE_WRITE_BLOCK_REQUEST, | |
455 | sess->node_id, sess->generation, sess->speed, | |
456 | sbp2_pointer_to_addr(&req->orb.ptr2), response, | |
457 | login_response_len); | |
458 | if (ret != RCODE_COMPLETE) { | |
459 | pr_debug("failed to write login response block: %x\n", ret); | |
460 | ||
461 | kfree(response); | |
462 | sbp_login_release(login, true); | |
463 | ||
464 | req->status.status = cpu_to_be32( | |
465 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
466 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
467 | return; | |
468 | } | |
469 | ||
470 | kfree(response); | |
471 | ||
472 | req->status.status = cpu_to_be32( | |
473 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
474 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
475 | } | |
476 | ||
477 | static void sbp_management_request_query_logins( | |
478 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
479 | int *status_data_size) | |
480 | { | |
481 | pr_notice("QUERY LOGINS not implemented\n"); | |
482 | /* FIXME: implement */ | |
483 | ||
484 | req->status.status = cpu_to_be32( | |
485 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
486 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
487 | } | |
488 | ||
489 | static void sbp_management_request_reconnect( | |
490 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
491 | int *status_data_size) | |
492 | { | |
493 | struct sbp_tport *tport = agent->tport; | |
494 | struct sbp_tpg *tpg = tport->tpg; | |
495 | int ret; | |
496 | u64 guid; | |
497 | struct sbp_login_descriptor *login; | |
498 | ||
499 | ret = read_peer_guid(&guid, req); | |
500 | if (ret != RCODE_COMPLETE) { | |
501 | pr_warn("failed to read peer GUID: %d\n", ret); | |
502 | ||
503 | req->status.status = cpu_to_be32( | |
504 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
505 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
506 | return; | |
507 | } | |
508 | ||
509 | pr_notice("mgt_agent RECONNECT from %016llx\n", guid); | |
510 | ||
511 | login = sbp_login_find_by_id(tpg, | |
512 | RECONNECT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc))); | |
513 | ||
514 | if (!login) { | |
515 | pr_err("mgt_agent RECONNECT unknown login ID\n"); | |
516 | ||
517 | req->status.status = cpu_to_be32( | |
518 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
519 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
520 | return; | |
521 | } | |
522 | ||
523 | if (login->sess->guid != guid) { | |
524 | pr_err("mgt_agent RECONNECT login GUID doesn't match\n"); | |
525 | ||
526 | req->status.status = cpu_to_be32( | |
527 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
528 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
529 | return; | |
530 | } | |
531 | ||
532 | spin_lock_bh(&login->sess->lock); | |
533 | if (login->sess->card) | |
534 | fw_card_put(login->sess->card); | |
535 | ||
536 | /* update the node details */ | |
537 | login->sess->generation = req->generation; | |
538 | login->sess->node_id = req->node_addr; | |
539 | login->sess->card = fw_card_get(req->card); | |
540 | login->sess->speed = req->speed; | |
541 | spin_unlock_bh(&login->sess->lock); | |
542 | ||
543 | req->status.status = cpu_to_be32( | |
544 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
545 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
546 | } | |
547 | ||
548 | static void sbp_management_request_logout( | |
549 | struct sbp_management_agent *agent, struct sbp_management_request *req, | |
550 | int *status_data_size) | |
551 | { | |
552 | struct sbp_tport *tport = agent->tport; | |
553 | struct sbp_tpg *tpg = tport->tpg; | |
5f2a3d61 | 554 | int id; |
a511ce33 CB |
555 | struct sbp_login_descriptor *login; |
556 | ||
5f2a3d61 | 557 | id = LOGOUT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc)); |
a511ce33 | 558 | |
5f2a3d61 | 559 | login = sbp_login_find_by_id(tpg, id); |
a511ce33 | 560 | if (!login) { |
5f2a3d61 | 561 | pr_warn("cannot find login: %d\n", id); |
a511ce33 CB |
562 | |
563 | req->status.status = cpu_to_be32( | |
564 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
565 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LOGIN_ID_UNKNOWN)); | |
566 | return; | |
567 | } | |
568 | ||
569 | pr_info("mgt_agent LOGOUT from LUN %d session %d\n", | |
6bb82612 | 570 | login->login_lun, login->login_id); |
a511ce33 CB |
571 | |
572 | if (req->node_addr != login->sess->node_id) { | |
573 | pr_warn("logout from different node ID\n"); | |
574 | ||
575 | req->status.status = cpu_to_be32( | |
576 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
577 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED)); | |
578 | return; | |
579 | } | |
580 | ||
581 | sbp_login_release(login, true); | |
582 | ||
583 | req->status.status = cpu_to_be32( | |
584 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
585 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
586 | } | |
587 | ||
588 | static void session_check_for_reset(struct sbp_session *sess) | |
589 | { | |
590 | bool card_valid = false; | |
591 | ||
592 | spin_lock_bh(&sess->lock); | |
593 | ||
594 | if (sess->card) { | |
595 | spin_lock_irq(&sess->card->lock); | |
596 | card_valid = (sess->card->local_node != NULL); | |
597 | spin_unlock_irq(&sess->card->lock); | |
598 | ||
599 | if (!card_valid) { | |
600 | fw_card_put(sess->card); | |
601 | sess->card = NULL; | |
602 | } | |
603 | } | |
604 | ||
605 | if (!card_valid || (sess->generation != sess->card->generation)) { | |
606 | pr_info("Waiting for reconnect from node: %016llx\n", | |
607 | sess->guid); | |
608 | ||
609 | sess->node_id = -1; | |
610 | sess->reconnect_expires = get_jiffies_64() + | |
611 | ((sess->reconnect_hold + 1) * HZ); | |
612 | } | |
613 | ||
614 | spin_unlock_bh(&sess->lock); | |
615 | } | |
616 | ||
617 | static void session_reconnect_expired(struct sbp_session *sess) | |
618 | { | |
619 | struct sbp_login_descriptor *login, *temp; | |
620 | LIST_HEAD(login_list); | |
621 | ||
622 | pr_info("Reconnect timer expired for node: %016llx\n", sess->guid); | |
623 | ||
624 | spin_lock_bh(&sess->lock); | |
625 | list_for_each_entry_safe(login, temp, &sess->login_list, link) { | |
626 | login->sess = NULL; | |
bf11eefc | 627 | list_move_tail(&login->link, &login_list); |
a511ce33 CB |
628 | } |
629 | spin_unlock_bh(&sess->lock); | |
630 | ||
631 | list_for_each_entry_safe(login, temp, &login_list, link) { | |
632 | list_del(&login->link); | |
633 | sbp_login_release(login, false); | |
634 | } | |
635 | ||
636 | sbp_session_release(sess, false); | |
637 | } | |
638 | ||
639 | static void session_maintenance_work(struct work_struct *work) | |
640 | { | |
641 | struct sbp_session *sess = container_of(work, struct sbp_session, | |
642 | maint_work.work); | |
643 | ||
644 | /* could be called while tearing down the session */ | |
645 | spin_lock_bh(&sess->lock); | |
646 | if (list_empty(&sess->login_list)) { | |
647 | spin_unlock_bh(&sess->lock); | |
648 | return; | |
649 | } | |
650 | spin_unlock_bh(&sess->lock); | |
651 | ||
652 | if (sess->node_id != -1) { | |
653 | /* check for bus reset and make node_id invalid */ | |
654 | session_check_for_reset(sess); | |
655 | ||
656 | schedule_delayed_work(&sess->maint_work, | |
657 | SESSION_MAINTENANCE_INTERVAL); | |
658 | } else if (!time_after64(get_jiffies_64(), sess->reconnect_expires)) { | |
659 | /* still waiting for reconnect */ | |
660 | schedule_delayed_work(&sess->maint_work, | |
661 | SESSION_MAINTENANCE_INTERVAL); | |
662 | } else { | |
663 | /* reconnect timeout has expired */ | |
664 | session_reconnect_expired(sess); | |
665 | } | |
666 | } | |
667 | ||
668 | static int tgt_agent_rw_agent_state(struct fw_card *card, int tcode, void *data, | |
669 | struct sbp_target_agent *agent) | |
670 | { | |
37419d67 | 671 | int state; |
a511ce33 CB |
672 | |
673 | switch (tcode) { | |
674 | case TCODE_READ_QUADLET_REQUEST: | |
675 | pr_debug("tgt_agent AGENT_STATE READ\n"); | |
676 | ||
677 | spin_lock_bh(&agent->lock); | |
37419d67 | 678 | state = agent->state; |
a511ce33 | 679 | spin_unlock_bh(&agent->lock); |
37419d67 CB |
680 | |
681 | *(__be32 *)data = cpu_to_be32(state); | |
a511ce33 CB |
682 | |
683 | return RCODE_COMPLETE; | |
684 | ||
685 | case TCODE_WRITE_QUADLET_REQUEST: | |
686 | /* ignored */ | |
687 | return RCODE_COMPLETE; | |
688 | ||
689 | default: | |
690 | return RCODE_TYPE_ERROR; | |
691 | } | |
692 | } | |
693 | ||
694 | static int tgt_agent_rw_agent_reset(struct fw_card *card, int tcode, void *data, | |
695 | struct sbp_target_agent *agent) | |
696 | { | |
697 | switch (tcode) { | |
698 | case TCODE_WRITE_QUADLET_REQUEST: | |
699 | pr_debug("tgt_agent AGENT_RESET\n"); | |
700 | spin_lock_bh(&agent->lock); | |
701 | agent->state = AGENT_STATE_RESET; | |
702 | spin_unlock_bh(&agent->lock); | |
703 | return RCODE_COMPLETE; | |
704 | ||
705 | default: | |
706 | return RCODE_TYPE_ERROR; | |
707 | } | |
708 | } | |
709 | ||
710 | static int tgt_agent_rw_orb_pointer(struct fw_card *card, int tcode, void *data, | |
711 | struct sbp_target_agent *agent) | |
712 | { | |
713 | struct sbp2_pointer *ptr = data; | |
714 | ||
715 | switch (tcode) { | |
716 | case TCODE_WRITE_BLOCK_REQUEST: | |
717 | spin_lock_bh(&agent->lock); | |
718 | if (agent->state != AGENT_STATE_SUSPENDED && | |
719 | agent->state != AGENT_STATE_RESET) { | |
720 | spin_unlock_bh(&agent->lock); | |
721 | pr_notice("Ignoring ORB_POINTER write while active.\n"); | |
722 | return RCODE_CONFLICT_ERROR; | |
723 | } | |
724 | agent->state = AGENT_STATE_ACTIVE; | |
725 | spin_unlock_bh(&agent->lock); | |
726 | ||
727 | agent->orb_pointer = sbp2_pointer_to_addr(ptr); | |
728 | agent->doorbell = false; | |
729 | ||
730 | pr_debug("tgt_agent ORB_POINTER write: 0x%llx\n", | |
731 | agent->orb_pointer); | |
732 | ||
733 | queue_work(system_unbound_wq, &agent->work); | |
734 | ||
735 | return RCODE_COMPLETE; | |
736 | ||
737 | case TCODE_READ_BLOCK_REQUEST: | |
738 | pr_debug("tgt_agent ORB_POINTER READ\n"); | |
739 | spin_lock_bh(&agent->lock); | |
740 | addr_to_sbp2_pointer(agent->orb_pointer, ptr); | |
741 | spin_unlock_bh(&agent->lock); | |
742 | return RCODE_COMPLETE; | |
743 | ||
744 | default: | |
745 | return RCODE_TYPE_ERROR; | |
746 | } | |
747 | } | |
748 | ||
749 | static int tgt_agent_rw_doorbell(struct fw_card *card, int tcode, void *data, | |
750 | struct sbp_target_agent *agent) | |
751 | { | |
752 | switch (tcode) { | |
753 | case TCODE_WRITE_QUADLET_REQUEST: | |
754 | spin_lock_bh(&agent->lock); | |
755 | if (agent->state != AGENT_STATE_SUSPENDED) { | |
756 | spin_unlock_bh(&agent->lock); | |
757 | pr_debug("Ignoring DOORBELL while active.\n"); | |
758 | return RCODE_CONFLICT_ERROR; | |
759 | } | |
760 | agent->state = AGENT_STATE_ACTIVE; | |
761 | spin_unlock_bh(&agent->lock); | |
762 | ||
763 | agent->doorbell = true; | |
764 | ||
765 | pr_debug("tgt_agent DOORBELL\n"); | |
766 | ||
767 | queue_work(system_unbound_wq, &agent->work); | |
768 | ||
769 | return RCODE_COMPLETE; | |
770 | ||
771 | case TCODE_READ_QUADLET_REQUEST: | |
772 | return RCODE_COMPLETE; | |
773 | ||
774 | default: | |
775 | return RCODE_TYPE_ERROR; | |
776 | } | |
777 | } | |
778 | ||
779 | static int tgt_agent_rw_unsolicited_status_enable(struct fw_card *card, | |
780 | int tcode, void *data, struct sbp_target_agent *agent) | |
781 | { | |
782 | switch (tcode) { | |
783 | case TCODE_WRITE_QUADLET_REQUEST: | |
784 | pr_debug("tgt_agent UNSOLICITED_STATUS_ENABLE\n"); | |
785 | /* ignored as we don't send unsolicited status */ | |
786 | return RCODE_COMPLETE; | |
787 | ||
788 | case TCODE_READ_QUADLET_REQUEST: | |
789 | return RCODE_COMPLETE; | |
790 | ||
791 | default: | |
792 | return RCODE_TYPE_ERROR; | |
793 | } | |
794 | } | |
795 | ||
796 | static void tgt_agent_rw(struct fw_card *card, struct fw_request *request, | |
797 | int tcode, int destination, int source, int generation, | |
798 | unsigned long long offset, void *data, size_t length, | |
799 | void *callback_data) | |
800 | { | |
801 | struct sbp_target_agent *agent = callback_data; | |
802 | struct sbp_session *sess = agent->login->sess; | |
803 | int sess_gen, sess_node, rcode; | |
804 | ||
805 | spin_lock_bh(&sess->lock); | |
806 | sess_gen = sess->generation; | |
807 | sess_node = sess->node_id; | |
808 | spin_unlock_bh(&sess->lock); | |
809 | ||
810 | if (generation != sess_gen) { | |
811 | pr_notice("ignoring request with wrong generation\n"); | |
812 | rcode = RCODE_TYPE_ERROR; | |
813 | goto out; | |
814 | } | |
815 | ||
816 | if (source != sess_node) { | |
817 | pr_notice("ignoring request from foreign node (%x != %x)\n", | |
818 | source, sess_node); | |
819 | rcode = RCODE_TYPE_ERROR; | |
820 | goto out; | |
821 | } | |
822 | ||
823 | /* turn offset into the offset from the start of the block */ | |
824 | offset -= agent->handler.offset; | |
825 | ||
826 | if (offset == 0x00 && length == 4) { | |
827 | /* AGENT_STATE */ | |
828 | rcode = tgt_agent_rw_agent_state(card, tcode, data, agent); | |
829 | } else if (offset == 0x04 && length == 4) { | |
830 | /* AGENT_RESET */ | |
831 | rcode = tgt_agent_rw_agent_reset(card, tcode, data, agent); | |
832 | } else if (offset == 0x08 && length == 8) { | |
833 | /* ORB_POINTER */ | |
834 | rcode = tgt_agent_rw_orb_pointer(card, tcode, data, agent); | |
835 | } else if (offset == 0x10 && length == 4) { | |
836 | /* DOORBELL */ | |
837 | rcode = tgt_agent_rw_doorbell(card, tcode, data, agent); | |
838 | } else if (offset == 0x14 && length == 4) { | |
839 | /* UNSOLICITED_STATUS_ENABLE */ | |
840 | rcode = tgt_agent_rw_unsolicited_status_enable(card, tcode, | |
841 | data, agent); | |
842 | } else { | |
843 | rcode = RCODE_ADDRESS_ERROR; | |
844 | } | |
845 | ||
846 | out: | |
847 | fw_send_response(card, request, rcode); | |
848 | } | |
849 | ||
850 | static void sbp_handle_command(struct sbp_target_request *); | |
851 | static int sbp_send_status(struct sbp_target_request *); | |
852 | static void sbp_free_request(struct sbp_target_request *); | |
853 | ||
854 | static void tgt_agent_process_work(struct work_struct *work) | |
855 | { | |
856 | struct sbp_target_request *req = | |
857 | container_of(work, struct sbp_target_request, work); | |
858 | ||
859 | pr_debug("tgt_orb ptr:0x%llx next_ORB:0x%llx data_descriptor:0x%llx misc:0x%x\n", | |
860 | req->orb_pointer, | |
861 | sbp2_pointer_to_addr(&req->orb.next_orb), | |
862 | sbp2_pointer_to_addr(&req->orb.data_descriptor), | |
863 | be32_to_cpu(req->orb.misc)); | |
864 | ||
865 | if (req->orb_pointer >> 32) | |
866 | pr_debug("ORB with high bits set\n"); | |
867 | ||
868 | switch (ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc))) { | |
869 | case 0:/* Format specified by this standard */ | |
870 | sbp_handle_command(req); | |
871 | return; | |
872 | case 1: /* Reserved for future standardization */ | |
873 | case 2: /* Vendor-dependent */ | |
874 | req->status.status |= cpu_to_be32( | |
875 | STATUS_BLOCK_RESP( | |
876 | STATUS_RESP_REQUEST_COMPLETE) | | |
877 | STATUS_BLOCK_DEAD(0) | | |
878 | STATUS_BLOCK_LEN(1) | | |
879 | STATUS_BLOCK_SBP_STATUS( | |
880 | SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
881 | sbp_send_status(req); | |
a511ce33 CB |
882 | return; |
883 | case 3: /* Dummy ORB */ | |
884 | req->status.status |= cpu_to_be32( | |
885 | STATUS_BLOCK_RESP( | |
886 | STATUS_RESP_REQUEST_COMPLETE) | | |
887 | STATUS_BLOCK_DEAD(0) | | |
888 | STATUS_BLOCK_LEN(1) | | |
889 | STATUS_BLOCK_SBP_STATUS( | |
890 | SBP_STATUS_DUMMY_ORB_COMPLETE)); | |
891 | sbp_send_status(req); | |
a511ce33 CB |
892 | return; |
893 | default: | |
894 | BUG(); | |
895 | } | |
896 | } | |
897 | ||
898 | /* used to double-check we haven't been issued an AGENT_RESET */ | |
899 | static inline bool tgt_agent_check_active(struct sbp_target_agent *agent) | |
900 | { | |
901 | bool active; | |
902 | ||
903 | spin_lock_bh(&agent->lock); | |
904 | active = (agent->state == AGENT_STATE_ACTIVE); | |
905 | spin_unlock_bh(&agent->lock); | |
906 | ||
907 | return active; | |
908 | } | |
909 | ||
5a3ee221 NB |
910 | static struct sbp_target_request *sbp_mgt_get_req(struct sbp_session *sess, |
911 | struct fw_card *card, u64 next_orb) | |
912 | { | |
913 | struct se_session *se_sess = sess->se_sess; | |
914 | struct sbp_target_request *req; | |
10e9cbb6 | 915 | int tag, cpu; |
5a3ee221 | 916 | |
10e9cbb6 | 917 | tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); |
5a3ee221 NB |
918 | if (tag < 0) |
919 | return ERR_PTR(-ENOMEM); | |
920 | ||
921 | req = &((struct sbp_target_request *)se_sess->sess_cmd_map)[tag]; | |
922 | memset(req, 0, sizeof(*req)); | |
923 | req->se_cmd.map_tag = tag; | |
10e9cbb6 | 924 | req->se_cmd.map_cpu = cpu; |
5a3ee221 NB |
925 | req->se_cmd.tag = next_orb; |
926 | ||
927 | return req; | |
928 | } | |
929 | ||
a511ce33 CB |
930 | static void tgt_agent_fetch_work(struct work_struct *work) |
931 | { | |
932 | struct sbp_target_agent *agent = | |
933 | container_of(work, struct sbp_target_agent, work); | |
934 | struct sbp_session *sess = agent->login->sess; | |
935 | struct sbp_target_request *req; | |
936 | int ret; | |
937 | bool doorbell = agent->doorbell; | |
938 | u64 next_orb = agent->orb_pointer; | |
939 | ||
940 | while (next_orb && tgt_agent_check_active(agent)) { | |
5a3ee221 NB |
941 | req = sbp_mgt_get_req(sess, sess->card, next_orb); |
942 | if (IS_ERR(req)) { | |
a511ce33 CB |
943 | spin_lock_bh(&agent->lock); |
944 | agent->state = AGENT_STATE_DEAD; | |
945 | spin_unlock_bh(&agent->lock); | |
946 | return; | |
947 | } | |
948 | ||
949 | req->login = agent->login; | |
950 | req->orb_pointer = next_orb; | |
951 | ||
952 | req->status.status = cpu_to_be32(STATUS_BLOCK_ORB_OFFSET_HIGH( | |
953 | req->orb_pointer >> 32)); | |
954 | req->status.orb_low = cpu_to_be32( | |
955 | req->orb_pointer & 0xfffffffc); | |
956 | ||
957 | /* read in the ORB */ | |
958 | ret = sbp_run_transaction(sess->card, TCODE_READ_BLOCK_REQUEST, | |
959 | sess->node_id, sess->generation, sess->speed, | |
960 | req->orb_pointer, &req->orb, sizeof(req->orb)); | |
961 | if (ret != RCODE_COMPLETE) { | |
962 | pr_debug("tgt_orb fetch failed: %x\n", ret); | |
963 | req->status.status |= cpu_to_be32( | |
964 | STATUS_BLOCK_SRC( | |
965 | STATUS_SRC_ORB_FINISHED) | | |
966 | STATUS_BLOCK_RESP( | |
967 | STATUS_RESP_TRANSPORT_FAILURE) | | |
968 | STATUS_BLOCK_DEAD(1) | | |
969 | STATUS_BLOCK_LEN(1) | | |
970 | STATUS_BLOCK_SBP_STATUS( | |
971 | SBP_STATUS_UNSPECIFIED_ERROR)); | |
972 | spin_lock_bh(&agent->lock); | |
973 | agent->state = AGENT_STATE_DEAD; | |
974 | spin_unlock_bh(&agent->lock); | |
975 | ||
976 | sbp_send_status(req); | |
a511ce33 CB |
977 | return; |
978 | } | |
979 | ||
980 | /* check the next_ORB field */ | |
981 | if (be32_to_cpu(req->orb.next_orb.high) & 0x80000000) { | |
982 | next_orb = 0; | |
983 | req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC( | |
984 | STATUS_SRC_ORB_FINISHED)); | |
985 | } else { | |
986 | next_orb = sbp2_pointer_to_addr(&req->orb.next_orb); | |
987 | req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC( | |
988 | STATUS_SRC_ORB_CONTINUING)); | |
989 | } | |
990 | ||
991 | if (tgt_agent_check_active(agent) && !doorbell) { | |
992 | INIT_WORK(&req->work, tgt_agent_process_work); | |
993 | queue_work(system_unbound_wq, &req->work); | |
994 | } else { | |
995 | /* don't process this request, just check next_ORB */ | |
996 | sbp_free_request(req); | |
997 | } | |
998 | ||
999 | spin_lock_bh(&agent->lock); | |
1000 | doorbell = agent->doorbell = false; | |
1001 | ||
1002 | /* check if we should carry on processing */ | |
1003 | if (next_orb) | |
1004 | agent->orb_pointer = next_orb; | |
1005 | else | |
1006 | agent->state = AGENT_STATE_SUSPENDED; | |
1007 | ||
1008 | spin_unlock_bh(&agent->lock); | |
1009 | }; | |
1010 | } | |
1011 | ||
1012 | static struct sbp_target_agent *sbp_target_agent_register( | |
1013 | struct sbp_login_descriptor *login) | |
1014 | { | |
1015 | struct sbp_target_agent *agent; | |
1016 | int ret; | |
1017 | ||
1018 | agent = kmalloc(sizeof(*agent), GFP_KERNEL); | |
1019 | if (!agent) | |
1020 | return ERR_PTR(-ENOMEM); | |
1021 | ||
1022 | spin_lock_init(&agent->lock); | |
1023 | ||
1024 | agent->handler.length = 0x20; | |
1025 | agent->handler.address_callback = tgt_agent_rw; | |
1026 | agent->handler.callback_data = agent; | |
1027 | ||
1028 | agent->login = login; | |
1029 | agent->state = AGENT_STATE_RESET; | |
1030 | INIT_WORK(&agent->work, tgt_agent_fetch_work); | |
1031 | agent->orb_pointer = 0; | |
1032 | agent->doorbell = false; | |
1033 | ||
1034 | ret = fw_core_add_address_handler(&agent->handler, | |
1035 | &sbp_register_region); | |
1036 | if (ret < 0) { | |
1037 | kfree(agent); | |
1038 | return ERR_PTR(ret); | |
1039 | } | |
1040 | ||
1041 | return agent; | |
1042 | } | |
1043 | ||
1044 | static void sbp_target_agent_unregister(struct sbp_target_agent *agent) | |
1045 | { | |
1046 | fw_core_remove_address_handler(&agent->handler); | |
1047 | cancel_work_sync(&agent->work); | |
1048 | kfree(agent); | |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * Simple wrapper around fw_run_transaction that retries the transaction several | |
1053 | * times in case of failure, with an exponential backoff. | |
1054 | */ | |
1055 | static int sbp_run_transaction(struct fw_card *card, int tcode, int destination_id, | |
1056 | int generation, int speed, unsigned long long offset, | |
1057 | void *payload, size_t length) | |
1058 | { | |
1059 | int attempt, ret, delay; | |
1060 | ||
1061 | for (attempt = 1; attempt <= 5; attempt++) { | |
1062 | ret = fw_run_transaction(card, tcode, destination_id, | |
1063 | generation, speed, offset, payload, length); | |
1064 | ||
1065 | switch (ret) { | |
1066 | case RCODE_COMPLETE: | |
1067 | case RCODE_TYPE_ERROR: | |
1068 | case RCODE_ADDRESS_ERROR: | |
1069 | case RCODE_GENERATION: | |
1070 | return ret; | |
1071 | ||
1072 | default: | |
1073 | delay = 5 * attempt * attempt; | |
1074 | usleep_range(delay, delay * 2); | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | return ret; | |
1079 | } | |
1080 | ||
1081 | /* | |
1082 | * Wrapper around sbp_run_transaction that gets the card, destination, | |
1083 | * generation and speed out of the request's session. | |
1084 | */ | |
1085 | static int sbp_run_request_transaction(struct sbp_target_request *req, | |
1086 | int tcode, unsigned long long offset, void *payload, | |
1087 | size_t length) | |
1088 | { | |
1089 | struct sbp_login_descriptor *login = req->login; | |
1090 | struct sbp_session *sess = login->sess; | |
1091 | struct fw_card *card; | |
1092 | int node_id, generation, speed, ret; | |
1093 | ||
1094 | spin_lock_bh(&sess->lock); | |
1095 | card = fw_card_get(sess->card); | |
1096 | node_id = sess->node_id; | |
1097 | generation = sess->generation; | |
1098 | speed = sess->speed; | |
1099 | spin_unlock_bh(&sess->lock); | |
1100 | ||
1101 | ret = sbp_run_transaction(card, tcode, node_id, generation, speed, | |
1102 | offset, payload, length); | |
1103 | ||
1104 | fw_card_put(card); | |
1105 | ||
1106 | return ret; | |
1107 | } | |
1108 | ||
1109 | static int sbp_fetch_command(struct sbp_target_request *req) | |
1110 | { | |
1111 | int ret, cmd_len, copy_len; | |
1112 | ||
1113 | cmd_len = scsi_command_size(req->orb.command_block); | |
1114 | ||
1115 | req->cmd_buf = kmalloc(cmd_len, GFP_KERNEL); | |
1116 | if (!req->cmd_buf) | |
1117 | return -ENOMEM; | |
1118 | ||
1119 | memcpy(req->cmd_buf, req->orb.command_block, | |
1120 | min_t(int, cmd_len, sizeof(req->orb.command_block))); | |
1121 | ||
1122 | if (cmd_len > sizeof(req->orb.command_block)) { | |
1123 | pr_debug("sbp_fetch_command: filling in long command\n"); | |
1124 | copy_len = cmd_len - sizeof(req->orb.command_block); | |
1125 | ||
1126 | ret = sbp_run_request_transaction(req, | |
1127 | TCODE_READ_BLOCK_REQUEST, | |
1128 | req->orb_pointer + sizeof(req->orb), | |
1129 | req->cmd_buf + sizeof(req->orb.command_block), | |
1130 | copy_len); | |
1131 | if (ret != RCODE_COMPLETE) | |
1132 | return -EIO; | |
1133 | } | |
1134 | ||
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | static int sbp_fetch_page_table(struct sbp_target_request *req) | |
1139 | { | |
1140 | int pg_tbl_sz, ret; | |
1141 | struct sbp_page_table_entry *pg_tbl; | |
1142 | ||
1143 | if (!CMDBLK_ORB_PG_TBL_PRESENT(be32_to_cpu(req->orb.misc))) | |
1144 | return 0; | |
1145 | ||
1146 | pg_tbl_sz = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)) * | |
1147 | sizeof(struct sbp_page_table_entry); | |
1148 | ||
1149 | pg_tbl = kmalloc(pg_tbl_sz, GFP_KERNEL); | |
1150 | if (!pg_tbl) | |
1151 | return -ENOMEM; | |
1152 | ||
1153 | ret = sbp_run_request_transaction(req, TCODE_READ_BLOCK_REQUEST, | |
1154 | sbp2_pointer_to_addr(&req->orb.data_descriptor), | |
1155 | pg_tbl, pg_tbl_sz); | |
1156 | if (ret != RCODE_COMPLETE) { | |
1157 | kfree(pg_tbl); | |
1158 | return -EIO; | |
1159 | } | |
1160 | ||
1161 | req->pg_tbl = pg_tbl; | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | static void sbp_calc_data_length_direction(struct sbp_target_request *req, | |
1166 | u32 *data_len, enum dma_data_direction *data_dir) | |
1167 | { | |
1168 | int data_size, direction, idx; | |
1169 | ||
1170 | data_size = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)); | |
1171 | direction = CMDBLK_ORB_DIRECTION(be32_to_cpu(req->orb.misc)); | |
1172 | ||
1173 | if (!data_size) { | |
1174 | *data_len = 0; | |
1175 | *data_dir = DMA_NONE; | |
1176 | return; | |
1177 | } | |
1178 | ||
1179 | *data_dir = direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1180 | ||
1181 | if (req->pg_tbl) { | |
1182 | *data_len = 0; | |
1183 | for (idx = 0; idx < data_size; idx++) { | |
1184 | *data_len += be16_to_cpu( | |
1185 | req->pg_tbl[idx].segment_length); | |
1186 | } | |
1187 | } else { | |
1188 | *data_len = data_size; | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | static void sbp_handle_command(struct sbp_target_request *req) | |
1193 | { | |
1194 | struct sbp_login_descriptor *login = req->login; | |
1195 | struct sbp_session *sess = login->sess; | |
1196 | int ret, unpacked_lun; | |
1197 | u32 data_length; | |
1198 | enum dma_data_direction data_dir; | |
1199 | ||
1200 | ret = sbp_fetch_command(req); | |
1201 | if (ret) { | |
1202 | pr_debug("sbp_handle_command: fetch command failed: %d\n", ret); | |
7c78b8de | 1203 | goto err; |
a511ce33 CB |
1204 | } |
1205 | ||
1206 | ret = sbp_fetch_page_table(req); | |
1207 | if (ret) { | |
1208 | pr_debug("sbp_handle_command: fetch page table failed: %d\n", | |
1209 | ret); | |
7c78b8de | 1210 | goto err; |
a511ce33 CB |
1211 | } |
1212 | ||
6bb82612 | 1213 | unpacked_lun = req->login->login_lun; |
a511ce33 CB |
1214 | sbp_calc_data_length_direction(req, &data_length, &data_dir); |
1215 | ||
1216 | pr_debug("sbp_handle_command ORB:0x%llx unpacked_lun:%d data_len:%d data_dir:%d\n", | |
1217 | req->orb_pointer, unpacked_lun, data_length, data_dir); | |
1218 | ||
649ee054 BVA |
1219 | /* only used for printk until we do TMRs */ |
1220 | req->se_cmd.tag = req->orb_pointer; | |
d6dfc868 RD |
1221 | if (target_submit_cmd(&req->se_cmd, sess->se_sess, req->cmd_buf, |
1222 | req->sense_buf, unpacked_lun, data_length, | |
5f27edad | 1223 | TCM_SIMPLE_TAG, data_dir, TARGET_SCF_ACK_KREF)) |
d6dfc868 RD |
1224 | goto err; |
1225 | ||
7c78b8de RD |
1226 | return; |
1227 | ||
1228 | err: | |
1229 | req->status.status |= cpu_to_be32( | |
1230 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1231 | STATUS_BLOCK_DEAD(0) | | |
1232 | STATUS_BLOCK_LEN(1) | | |
1233 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1234 | sbp_send_status(req); | |
a511ce33 CB |
1235 | } |
1236 | ||
1237 | /* | |
1238 | * DMA_TO_DEVICE = read from initiator (SCSI WRITE) | |
1239 | * DMA_FROM_DEVICE = write to initiator (SCSI READ) | |
1240 | */ | |
1241 | static int sbp_rw_data(struct sbp_target_request *req) | |
1242 | { | |
1243 | struct sbp_session *sess = req->login->sess; | |
1244 | int tcode, sg_miter_flags, max_payload, pg_size, speed, node_id, | |
1245 | generation, num_pte, length, tfr_length, | |
1246 | rcode = RCODE_COMPLETE; | |
1247 | struct sbp_page_table_entry *pte; | |
1248 | unsigned long long offset; | |
1249 | struct fw_card *card; | |
1250 | struct sg_mapping_iter iter; | |
1251 | ||
1252 | if (req->se_cmd.data_direction == DMA_FROM_DEVICE) { | |
1253 | tcode = TCODE_WRITE_BLOCK_REQUEST; | |
1254 | sg_miter_flags = SG_MITER_FROM_SG; | |
1255 | } else { | |
1256 | tcode = TCODE_READ_BLOCK_REQUEST; | |
1257 | sg_miter_flags = SG_MITER_TO_SG; | |
1258 | } | |
1259 | ||
1260 | max_payload = 4 << CMDBLK_ORB_MAX_PAYLOAD(be32_to_cpu(req->orb.misc)); | |
1261 | speed = CMDBLK_ORB_SPEED(be32_to_cpu(req->orb.misc)); | |
1262 | ||
1263 | pg_size = CMDBLK_ORB_PG_SIZE(be32_to_cpu(req->orb.misc)); | |
1264 | if (pg_size) { | |
1265 | pr_err("sbp_run_transaction: page size ignored\n"); | |
1266 | pg_size = 0x100 << pg_size; | |
1267 | } | |
1268 | ||
1269 | spin_lock_bh(&sess->lock); | |
1270 | card = fw_card_get(sess->card); | |
1271 | node_id = sess->node_id; | |
1272 | generation = sess->generation; | |
1273 | spin_unlock_bh(&sess->lock); | |
1274 | ||
1275 | if (req->pg_tbl) { | |
1276 | pte = req->pg_tbl; | |
1277 | num_pte = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)); | |
1278 | ||
1279 | offset = 0; | |
1280 | length = 0; | |
1281 | } else { | |
1282 | pte = NULL; | |
1283 | num_pte = 0; | |
1284 | ||
1285 | offset = sbp2_pointer_to_addr(&req->orb.data_descriptor); | |
1286 | length = req->se_cmd.data_length; | |
1287 | } | |
1288 | ||
1289 | sg_miter_start(&iter, req->se_cmd.t_data_sg, req->se_cmd.t_data_nents, | |
1290 | sg_miter_flags); | |
1291 | ||
1292 | while (length || num_pte) { | |
1293 | if (!length) { | |
1294 | offset = (u64)be16_to_cpu(pte->segment_base_hi) << 32 | | |
1295 | be32_to_cpu(pte->segment_base_lo); | |
1296 | length = be16_to_cpu(pte->segment_length); | |
1297 | ||
1298 | pte++; | |
1299 | num_pte--; | |
1300 | } | |
1301 | ||
1302 | sg_miter_next(&iter); | |
1303 | ||
1304 | tfr_length = min3(length, max_payload, (int)iter.length); | |
1305 | ||
1306 | /* FIXME: take page_size into account */ | |
1307 | ||
1308 | rcode = sbp_run_transaction(card, tcode, node_id, | |
1309 | generation, speed, | |
1310 | offset, iter.addr, tfr_length); | |
1311 | ||
1312 | if (rcode != RCODE_COMPLETE) | |
1313 | break; | |
1314 | ||
1315 | length -= tfr_length; | |
1316 | offset += tfr_length; | |
1317 | iter.consumed = tfr_length; | |
1318 | } | |
1319 | ||
1320 | sg_miter_stop(&iter); | |
1321 | fw_card_put(card); | |
1322 | ||
1323 | if (rcode == RCODE_COMPLETE) { | |
1324 | WARN_ON(length != 0); | |
1325 | return 0; | |
1326 | } else { | |
1327 | return -EIO; | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | static int sbp_send_status(struct sbp_target_request *req) | |
1332 | { | |
5f27edad | 1333 | int rc, ret = 0, length; |
a511ce33 CB |
1334 | struct sbp_login_descriptor *login = req->login; |
1335 | ||
1336 | length = (((be32_to_cpu(req->status.status) >> 24) & 0x07) + 1) * 4; | |
1337 | ||
5f27edad | 1338 | rc = sbp_run_request_transaction(req, TCODE_WRITE_BLOCK_REQUEST, |
a511ce33 | 1339 | login->status_fifo_addr, &req->status, length); |
5f27edad NB |
1340 | if (rc != RCODE_COMPLETE) { |
1341 | pr_debug("sbp_send_status: write failed: 0x%x\n", rc); | |
1342 | ret = -EIO; | |
1343 | goto put_ref; | |
a511ce33 CB |
1344 | } |
1345 | ||
1346 | pr_debug("sbp_send_status: status write complete for ORB: 0x%llx\n", | |
1347 | req->orb_pointer); | |
5f27edad NB |
1348 | /* |
1349 | * Drop the extra ACK_KREF reference taken by target_submit_cmd() | |
1350 | * ahead of sbp_check_stop_free() -> transport_generic_free_cmd() | |
1351 | * final se_cmd->cmd_kref put. | |
1352 | */ | |
1353 | put_ref: | |
1354 | target_put_sess_cmd(&req->se_cmd); | |
1355 | return ret; | |
a511ce33 CB |
1356 | } |
1357 | ||
1358 | static void sbp_sense_mangle(struct sbp_target_request *req) | |
1359 | { | |
1360 | struct se_cmd *se_cmd = &req->se_cmd; | |
1361 | u8 *sense = req->sense_buf; | |
1362 | u8 *status = req->status.data; | |
1363 | ||
1364 | WARN_ON(se_cmd->scsi_sense_length < 18); | |
1365 | ||
1366 | switch (sense[0] & 0x7f) { /* sfmt */ | |
1367 | case 0x70: /* current, fixed */ | |
1368 | status[0] = 0 << 6; | |
1369 | break; | |
1370 | case 0x71: /* deferred, fixed */ | |
1371 | status[0] = 1 << 6; | |
1372 | break; | |
1373 | case 0x72: /* current, descriptor */ | |
1374 | case 0x73: /* deferred, descriptor */ | |
1375 | default: | |
1376 | /* | |
1377 | * TODO: SBP-3 specifies what we should do with descriptor | |
1378 | * format sense data | |
1379 | */ | |
1380 | pr_err("sbp_send_sense: unknown sense format: 0x%x\n", | |
1381 | sense[0]); | |
1382 | req->status.status |= cpu_to_be32( | |
1383 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1384 | STATUS_BLOCK_DEAD(0) | | |
1385 | STATUS_BLOCK_LEN(1) | | |
1386 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQUEST_ABORTED)); | |
1387 | return; | |
1388 | } | |
1389 | ||
1390 | status[0] |= se_cmd->scsi_status & 0x3f;/* status */ | |
1391 | status[1] = | |
1392 | (sense[0] & 0x80) | /* valid */ | |
1393 | ((sense[2] & 0xe0) >> 1) | /* mark, eom, ili */ | |
1394 | (sense[2] & 0x0f); /* sense_key */ | |
1395 | status[2] = se_cmd->scsi_asc; /* sense_code */ | |
1396 | status[3] = se_cmd->scsi_ascq; /* sense_qualifier */ | |
1397 | ||
1398 | /* information */ | |
1399 | status[4] = sense[3]; | |
1400 | status[5] = sense[4]; | |
1401 | status[6] = sense[5]; | |
1402 | status[7] = sense[6]; | |
1403 | ||
1404 | /* CDB-dependent */ | |
1405 | status[8] = sense[8]; | |
1406 | status[9] = sense[9]; | |
1407 | status[10] = sense[10]; | |
1408 | status[11] = sense[11]; | |
1409 | ||
1410 | /* fru */ | |
1411 | status[12] = sense[14]; | |
1412 | ||
1413 | /* sense_key-dependent */ | |
1414 | status[13] = sense[15]; | |
1415 | status[14] = sense[16]; | |
1416 | status[15] = sense[17]; | |
1417 | ||
1418 | req->status.status |= cpu_to_be32( | |
1419 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1420 | STATUS_BLOCK_DEAD(0) | | |
1421 | STATUS_BLOCK_LEN(5) | | |
1422 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
1423 | } | |
1424 | ||
1425 | static int sbp_send_sense(struct sbp_target_request *req) | |
1426 | { | |
1427 | struct se_cmd *se_cmd = &req->se_cmd; | |
1428 | ||
1429 | if (se_cmd->scsi_sense_length) { | |
1430 | sbp_sense_mangle(req); | |
1431 | } else { | |
1432 | req->status.status |= cpu_to_be32( | |
1433 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1434 | STATUS_BLOCK_DEAD(0) | | |
1435 | STATUS_BLOCK_LEN(1) | | |
1436 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK)); | |
1437 | } | |
1438 | ||
1439 | return sbp_send_status(req); | |
1440 | } | |
1441 | ||
1442 | static void sbp_free_request(struct sbp_target_request *req) | |
1443 | { | |
5a3ee221 NB |
1444 | struct se_cmd *se_cmd = &req->se_cmd; |
1445 | struct se_session *se_sess = se_cmd->se_sess; | |
1446 | ||
a511ce33 CB |
1447 | kfree(req->pg_tbl); |
1448 | kfree(req->cmd_buf); | |
5a3ee221 | 1449 | |
83c2b54b | 1450 | target_free_tag(se_sess, se_cmd); |
a511ce33 CB |
1451 | } |
1452 | ||
1453 | static void sbp_mgt_agent_process(struct work_struct *work) | |
1454 | { | |
1455 | struct sbp_management_agent *agent = | |
1456 | container_of(work, struct sbp_management_agent, work); | |
1457 | struct sbp_management_request *req = agent->request; | |
1458 | int ret; | |
1459 | int status_data_len = 0; | |
1460 | ||
1461 | /* fetch the ORB from the initiator */ | |
1462 | ret = sbp_run_transaction(req->card, TCODE_READ_BLOCK_REQUEST, | |
1463 | req->node_addr, req->generation, req->speed, | |
1464 | agent->orb_offset, &req->orb, sizeof(req->orb)); | |
1465 | if (ret != RCODE_COMPLETE) { | |
1466 | pr_debug("mgt_orb fetch failed: %x\n", ret); | |
1467 | goto out; | |
1468 | } | |
1469 | ||
1470 | pr_debug("mgt_orb ptr1:0x%llx ptr2:0x%llx misc:0x%x len:0x%x status_fifo:0x%llx\n", | |
1471 | sbp2_pointer_to_addr(&req->orb.ptr1), | |
1472 | sbp2_pointer_to_addr(&req->orb.ptr2), | |
1473 | be32_to_cpu(req->orb.misc), be32_to_cpu(req->orb.length), | |
1474 | sbp2_pointer_to_addr(&req->orb.status_fifo)); | |
1475 | ||
1476 | if (!ORB_NOTIFY(be32_to_cpu(req->orb.misc)) || | |
1477 | ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc)) != 0) { | |
1478 | pr_err("mgt_orb bad request\n"); | |
1479 | goto out; | |
1480 | } | |
1481 | ||
1482 | switch (MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))) { | |
1483 | case MANAGEMENT_ORB_FUNCTION_LOGIN: | |
1484 | sbp_management_request_login(agent, req, &status_data_len); | |
1485 | break; | |
1486 | ||
1487 | case MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS: | |
1488 | sbp_management_request_query_logins(agent, req, | |
1489 | &status_data_len); | |
1490 | break; | |
1491 | ||
1492 | case MANAGEMENT_ORB_FUNCTION_RECONNECT: | |
1493 | sbp_management_request_reconnect(agent, req, &status_data_len); | |
1494 | break; | |
1495 | ||
1496 | case MANAGEMENT_ORB_FUNCTION_SET_PASSWORD: | |
1497 | pr_notice("SET PASSWORD not implemented\n"); | |
1498 | ||
1499 | req->status.status = cpu_to_be32( | |
1500 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1501 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1502 | ||
1503 | break; | |
1504 | ||
1505 | case MANAGEMENT_ORB_FUNCTION_LOGOUT: | |
1506 | sbp_management_request_logout(agent, req, &status_data_len); | |
1507 | break; | |
1508 | ||
1509 | case MANAGEMENT_ORB_FUNCTION_ABORT_TASK: | |
1510 | pr_notice("ABORT TASK 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_ABORT_TASK_SET: | |
1519 | pr_notice("ABORT TASK SET not implemented\n"); | |
1520 | ||
1521 | req->status.status = cpu_to_be32( | |
1522 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1523 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1524 | ||
1525 | break; | |
1526 | ||
1527 | case MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET: | |
1528 | pr_notice("LOGICAL UNIT RESET not implemented\n"); | |
1529 | ||
1530 | req->status.status = cpu_to_be32( | |
1531 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1532 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1533 | ||
1534 | break; | |
1535 | ||
1536 | case MANAGEMENT_ORB_FUNCTION_TARGET_RESET: | |
1537 | pr_notice("TARGET RESET not implemented\n"); | |
1538 | ||
1539 | req->status.status = cpu_to_be32( | |
1540 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1541 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1542 | ||
1543 | break; | |
1544 | ||
1545 | default: | |
1546 | pr_notice("unknown management function 0x%x\n", | |
1547 | MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))); | |
1548 | ||
1549 | req->status.status = cpu_to_be32( | |
1550 | STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) | | |
1551 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP)); | |
1552 | ||
1553 | break; | |
1554 | } | |
1555 | ||
1556 | req->status.status |= cpu_to_be32( | |
1557 | STATUS_BLOCK_SRC(1) | /* Response to ORB, next_ORB absent */ | |
1558 | STATUS_BLOCK_LEN(DIV_ROUND_UP(status_data_len, 4) + 1) | | |
1559 | STATUS_BLOCK_ORB_OFFSET_HIGH(agent->orb_offset >> 32)); | |
1560 | req->status.orb_low = cpu_to_be32(agent->orb_offset); | |
1561 | ||
1562 | /* write the status block back to the initiator */ | |
1563 | ret = sbp_run_transaction(req->card, TCODE_WRITE_BLOCK_REQUEST, | |
1564 | req->node_addr, req->generation, req->speed, | |
1565 | sbp2_pointer_to_addr(&req->orb.status_fifo), | |
1566 | &req->status, 8 + status_data_len); | |
1567 | if (ret != RCODE_COMPLETE) { | |
1568 | pr_debug("mgt_orb status write failed: %x\n", ret); | |
1569 | goto out; | |
1570 | } | |
1571 | ||
1572 | out: | |
1573 | fw_card_put(req->card); | |
1574 | kfree(req); | |
1575 | ||
1576 | spin_lock_bh(&agent->lock); | |
1577 | agent->state = MANAGEMENT_AGENT_STATE_IDLE; | |
1578 | spin_unlock_bh(&agent->lock); | |
1579 | } | |
1580 | ||
1581 | static void sbp_mgt_agent_rw(struct fw_card *card, | |
1582 | struct fw_request *request, int tcode, int destination, int source, | |
1583 | int generation, unsigned long long offset, void *data, size_t length, | |
1584 | void *callback_data) | |
1585 | { | |
1586 | struct sbp_management_agent *agent = callback_data; | |
1587 | struct sbp2_pointer *ptr = data; | |
1588 | int rcode = RCODE_ADDRESS_ERROR; | |
1589 | ||
1590 | if (!agent->tport->enable) | |
1591 | goto out; | |
1592 | ||
1593 | if ((offset != agent->handler.offset) || (length != 8)) | |
1594 | goto out; | |
1595 | ||
1596 | if (tcode == TCODE_WRITE_BLOCK_REQUEST) { | |
1597 | struct sbp_management_request *req; | |
1598 | int prev_state; | |
1599 | ||
1600 | spin_lock_bh(&agent->lock); | |
1601 | prev_state = agent->state; | |
1602 | agent->state = MANAGEMENT_AGENT_STATE_BUSY; | |
1603 | spin_unlock_bh(&agent->lock); | |
1604 | ||
1605 | if (prev_state == MANAGEMENT_AGENT_STATE_BUSY) { | |
1606 | pr_notice("ignoring management request while busy\n"); | |
1607 | rcode = RCODE_CONFLICT_ERROR; | |
1608 | goto out; | |
1609 | } | |
a511ce33 CB |
1610 | req = kzalloc(sizeof(*req), GFP_ATOMIC); |
1611 | if (!req) { | |
1612 | rcode = RCODE_CONFLICT_ERROR; | |
1613 | goto out; | |
1614 | } | |
1615 | ||
1616 | req->card = fw_card_get(card); | |
1617 | req->generation = generation; | |
1618 | req->node_addr = source; | |
1619 | req->speed = fw_get_request_speed(request); | |
1620 | ||
1621 | agent->orb_offset = sbp2_pointer_to_addr(ptr); | |
1622 | agent->request = req; | |
1623 | ||
1624 | queue_work(system_unbound_wq, &agent->work); | |
1625 | rcode = RCODE_COMPLETE; | |
1626 | } else if (tcode == TCODE_READ_BLOCK_REQUEST) { | |
1627 | addr_to_sbp2_pointer(agent->orb_offset, ptr); | |
1628 | rcode = RCODE_COMPLETE; | |
1629 | } else { | |
1630 | rcode = RCODE_TYPE_ERROR; | |
1631 | } | |
1632 | ||
1633 | out: | |
1634 | fw_send_response(card, request, rcode); | |
1635 | } | |
1636 | ||
1637 | static struct sbp_management_agent *sbp_management_agent_register( | |
1638 | struct sbp_tport *tport) | |
1639 | { | |
1640 | int ret; | |
1641 | struct sbp_management_agent *agent; | |
1642 | ||
1643 | agent = kmalloc(sizeof(*agent), GFP_KERNEL); | |
1644 | if (!agent) | |
1645 | return ERR_PTR(-ENOMEM); | |
1646 | ||
1647 | spin_lock_init(&agent->lock); | |
1648 | agent->tport = tport; | |
1649 | agent->handler.length = 0x08; | |
1650 | agent->handler.address_callback = sbp_mgt_agent_rw; | |
1651 | agent->handler.callback_data = agent; | |
1652 | agent->state = MANAGEMENT_AGENT_STATE_IDLE; | |
1653 | INIT_WORK(&agent->work, sbp_mgt_agent_process); | |
1654 | agent->orb_offset = 0; | |
1655 | agent->request = NULL; | |
1656 | ||
1657 | ret = fw_core_add_address_handler(&agent->handler, | |
1658 | &sbp_register_region); | |
1659 | if (ret < 0) { | |
1660 | kfree(agent); | |
1661 | return ERR_PTR(ret); | |
1662 | } | |
1663 | ||
1664 | return agent; | |
1665 | } | |
1666 | ||
1667 | static void sbp_management_agent_unregister(struct sbp_management_agent *agent) | |
1668 | { | |
1669 | fw_core_remove_address_handler(&agent->handler); | |
1670 | cancel_work_sync(&agent->work); | |
1671 | kfree(agent); | |
1672 | } | |
1673 | ||
1674 | static int sbp_check_true(struct se_portal_group *se_tpg) | |
1675 | { | |
1676 | return 1; | |
1677 | } | |
1678 | ||
1679 | static int sbp_check_false(struct se_portal_group *se_tpg) | |
1680 | { | |
1681 | return 0; | |
1682 | } | |
1683 | ||
a511ce33 CB |
1684 | static char *sbp_get_fabric_wwn(struct se_portal_group *se_tpg) |
1685 | { | |
1686 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1687 | struct sbp_tport *tport = tpg->tport; | |
1688 | ||
1689 | return &tport->tport_name[0]; | |
1690 | } | |
1691 | ||
1692 | static u16 sbp_get_tag(struct se_portal_group *se_tpg) | |
1693 | { | |
1694 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1695 | return tpg->tport_tpgt; | |
1696 | } | |
1697 | ||
a511ce33 CB |
1698 | static u32 sbp_tpg_get_inst_index(struct se_portal_group *se_tpg) |
1699 | { | |
1700 | return 1; | |
1701 | } | |
1702 | ||
1703 | static void sbp_release_cmd(struct se_cmd *se_cmd) | |
1704 | { | |
1705 | struct sbp_target_request *req = container_of(se_cmd, | |
1706 | struct sbp_target_request, se_cmd); | |
1707 | ||
1708 | sbp_free_request(req); | |
1709 | } | |
1710 | ||
a511ce33 CB |
1711 | static u32 sbp_sess_get_index(struct se_session *se_sess) |
1712 | { | |
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | static int sbp_write_pending(struct se_cmd *se_cmd) | |
1717 | { | |
1718 | struct sbp_target_request *req = container_of(se_cmd, | |
1719 | struct sbp_target_request, se_cmd); | |
1720 | int ret; | |
1721 | ||
1722 | ret = sbp_rw_data(req); | |
1723 | if (ret) { | |
1724 | req->status.status |= cpu_to_be32( | |
1725 | STATUS_BLOCK_RESP( | |
1726 | STATUS_RESP_TRANSPORT_FAILURE) | | |
1727 | STATUS_BLOCK_DEAD(0) | | |
1728 | STATUS_BLOCK_LEN(1) | | |
1729 | STATUS_BLOCK_SBP_STATUS( | |
1730 | SBP_STATUS_UNSPECIFIED_ERROR)); | |
1731 | sbp_send_status(req); | |
1732 | return ret; | |
1733 | } | |
1734 | ||
70baf0ab | 1735 | target_execute_cmd(se_cmd); |
a511ce33 CB |
1736 | return 0; |
1737 | } | |
1738 | ||
a511ce33 CB |
1739 | static void sbp_set_default_node_attrs(struct se_node_acl *nacl) |
1740 | { | |
1741 | return; | |
1742 | } | |
1743 | ||
a511ce33 CB |
1744 | static int sbp_get_cmd_state(struct se_cmd *se_cmd) |
1745 | { | |
1746 | return 0; | |
1747 | } | |
1748 | ||
1749 | static int sbp_queue_data_in(struct se_cmd *se_cmd) | |
1750 | { | |
1751 | struct sbp_target_request *req = container_of(se_cmd, | |
1752 | struct sbp_target_request, se_cmd); | |
1753 | int ret; | |
1754 | ||
1755 | ret = sbp_rw_data(req); | |
1756 | if (ret) { | |
1757 | req->status.status |= cpu_to_be32( | |
1758 | STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) | | |
1759 | STATUS_BLOCK_DEAD(0) | | |
1760 | STATUS_BLOCK_LEN(1) | | |
1761 | STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR)); | |
1762 | sbp_send_status(req); | |
1763 | return ret; | |
1764 | } | |
1765 | ||
1766 | return sbp_send_sense(req); | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Called after command (no data transfer) or after the write (to device) | |
1771 | * operation is completed | |
1772 | */ | |
1773 | static int sbp_queue_status(struct se_cmd *se_cmd) | |
1774 | { | |
1775 | struct sbp_target_request *req = container_of(se_cmd, | |
1776 | struct sbp_target_request, se_cmd); | |
1777 | ||
1778 | return sbp_send_sense(req); | |
1779 | } | |
1780 | ||
b79fafac | 1781 | static void sbp_queue_tm_rsp(struct se_cmd *se_cmd) |
a511ce33 | 1782 | { |
a511ce33 CB |
1783 | } |
1784 | ||
131e6abc NB |
1785 | static void sbp_aborted_task(struct se_cmd *se_cmd) |
1786 | { | |
1787 | return; | |
1788 | } | |
1789 | ||
a511ce33 CB |
1790 | static int sbp_check_stop_free(struct se_cmd *se_cmd) |
1791 | { | |
1792 | struct sbp_target_request *req = container_of(se_cmd, | |
1793 | struct sbp_target_request, se_cmd); | |
1794 | ||
5f27edad | 1795 | return transport_generic_free_cmd(&req->se_cmd, 0); |
a511ce33 CB |
1796 | } |
1797 | ||
a511ce33 CB |
1798 | static int sbp_count_se_tpg_luns(struct se_portal_group *tpg) |
1799 | { | |
6bb82612 NB |
1800 | struct se_lun *lun; |
1801 | int count = 0; | |
a511ce33 | 1802 | |
6bb82612 NB |
1803 | rcu_read_lock(); |
1804 | hlist_for_each_entry_rcu(lun, &tpg->tpg_lun_hlist, link) | |
a511ce33 | 1805 | count++; |
6bb82612 | 1806 | rcu_read_unlock(); |
a511ce33 CB |
1807 | |
1808 | return count; | |
1809 | } | |
1810 | ||
1811 | static int sbp_update_unit_directory(struct sbp_tport *tport) | |
1812 | { | |
6bb82612 NB |
1813 | struct se_lun *lun; |
1814 | int num_luns, num_entries, idx = 0, mgt_agt_addr, ret; | |
a511ce33 CB |
1815 | u32 *data; |
1816 | ||
1817 | if (tport->unit_directory.data) { | |
1818 | fw_core_remove_descriptor(&tport->unit_directory); | |
1819 | kfree(tport->unit_directory.data); | |
1820 | tport->unit_directory.data = NULL; | |
1821 | } | |
1822 | ||
1823 | if (!tport->enable || !tport->tpg) | |
1824 | return 0; | |
1825 | ||
1826 | num_luns = sbp_count_se_tpg_luns(&tport->tpg->se_tpg); | |
1827 | ||
1828 | /* | |
1829 | * Number of entries in the final unit directory: | |
1830 | * - all of those in the template | |
1831 | * - management_agent | |
1832 | * - unit_characteristics | |
1833 | * - reconnect_timeout | |
1834 | * - unit unique ID | |
1835 | * - one for each LUN | |
1836 | * | |
1837 | * MUST NOT include leaf or sub-directory entries | |
1838 | */ | |
1839 | num_entries = ARRAY_SIZE(sbp_unit_directory_template) + 4 + num_luns; | |
1840 | ||
1841 | if (tport->directory_id != -1) | |
1842 | num_entries++; | |
1843 | ||
1844 | /* allocate num_entries + 4 for the header and unique ID leaf */ | |
1845 | data = kcalloc((num_entries + 4), sizeof(u32), GFP_KERNEL); | |
1846 | if (!data) | |
1847 | return -ENOMEM; | |
1848 | ||
1849 | /* directory_length */ | |
1850 | data[idx++] = num_entries << 16; | |
1851 | ||
1852 | /* directory_id */ | |
1853 | if (tport->directory_id != -1) | |
1854 | data[idx++] = (CSR_DIRECTORY_ID << 24) | tport->directory_id; | |
1855 | ||
1856 | /* unit directory template */ | |
1857 | memcpy(&data[idx], sbp_unit_directory_template, | |
1858 | sizeof(sbp_unit_directory_template)); | |
1859 | idx += ARRAY_SIZE(sbp_unit_directory_template); | |
1860 | ||
1861 | /* management_agent */ | |
1862 | mgt_agt_addr = (tport->mgt_agt->handler.offset - CSR_REGISTER_BASE) / 4; | |
1863 | data[idx++] = 0x54000000 | (mgt_agt_addr & 0x00ffffff); | |
1864 | ||
1865 | /* unit_characteristics */ | |
1866 | data[idx++] = 0x3a000000 | | |
1867 | (((tport->mgt_orb_timeout * 2) << 8) & 0xff00) | | |
1868 | SBP_ORB_FETCH_SIZE; | |
1869 | ||
1870 | /* reconnect_timeout */ | |
1871 | data[idx++] = 0x3d000000 | (tport->max_reconnect_timeout & 0xffff); | |
1872 | ||
1873 | /* unit unique ID (leaf is just after LUNs) */ | |
1874 | data[idx++] = 0x8d000000 | (num_luns + 1); | |
1875 | ||
6bb82612 NB |
1876 | rcu_read_lock(); |
1877 | hlist_for_each_entry_rcu(lun, &tport->tpg->se_tpg.tpg_lun_hlist, link) { | |
a511ce33 CB |
1878 | struct se_device *dev; |
1879 | int type; | |
4cc987ea NB |
1880 | /* |
1881 | * rcu_dereference_raw protected by se_lun->lun_group symlink | |
1882 | * reference to se_device->dev_group. | |
1883 | */ | |
1884 | dev = rcu_dereference_raw(lun->lun_se_dev); | |
a511ce33 CB |
1885 | type = dev->transport->get_device_type(dev); |
1886 | ||
1887 | /* logical_unit_number */ | |
1888 | data[idx++] = 0x14000000 | | |
1889 | ((type << 16) & 0x1f0000) | | |
6bb82612 | 1890 | (lun->unpacked_lun & 0xffff); |
a511ce33 | 1891 | } |
6bb82612 | 1892 | rcu_read_unlock(); |
a511ce33 CB |
1893 | |
1894 | /* unit unique ID leaf */ | |
1895 | data[idx++] = 2 << 16; | |
1896 | data[idx++] = tport->guid >> 32; | |
1897 | data[idx++] = tport->guid; | |
1898 | ||
1899 | tport->unit_directory.length = idx; | |
1900 | tport->unit_directory.key = (CSR_DIRECTORY | CSR_UNIT) << 24; | |
1901 | tport->unit_directory.data = data; | |
1902 | ||
1903 | ret = fw_core_add_descriptor(&tport->unit_directory); | |
1904 | if (ret < 0) { | |
1905 | kfree(tport->unit_directory.data); | |
1906 | tport->unit_directory.data = NULL; | |
1907 | } | |
1908 | ||
1909 | return ret; | |
1910 | } | |
1911 | ||
343d475d | 1912 | static ssize_t sbp_parse_wwn(const char *name, u64 *wwn) |
a511ce33 CB |
1913 | { |
1914 | const char *cp; | |
1915 | char c, nibble; | |
1916 | int pos = 0, err; | |
1917 | ||
1918 | *wwn = 0; | |
1919 | for (cp = name; cp < &name[SBP_NAMELEN - 1]; cp++) { | |
1920 | c = *cp; | |
1921 | if (c == '\n' && cp[1] == '\0') | |
1922 | continue; | |
1923 | if (c == '\0') { | |
1924 | err = 2; | |
1925 | if (pos != 16) | |
1926 | goto fail; | |
1927 | return cp - name; | |
1928 | } | |
1929 | err = 3; | |
1930 | if (isdigit(c)) | |
1931 | nibble = c - '0'; | |
343d475d | 1932 | else if (isxdigit(c)) |
a511ce33 CB |
1933 | nibble = tolower(c) - 'a' + 10; |
1934 | else | |
1935 | goto fail; | |
1936 | *wwn = (*wwn << 4) | nibble; | |
1937 | pos++; | |
1938 | } | |
1939 | err = 4; | |
1940 | fail: | |
1941 | printk(KERN_INFO "err %u len %zu pos %u\n", | |
1942 | err, cp - name, pos); | |
1943 | return -1; | |
1944 | } | |
1945 | ||
1946 | static ssize_t sbp_format_wwn(char *buf, size_t len, u64 wwn) | |
1947 | { | |
1948 | return snprintf(buf, len, "%016llx", wwn); | |
1949 | } | |
1950 | ||
c7d6a803 | 1951 | static int sbp_init_nodeacl(struct se_node_acl *se_nacl, const char *name) |
a511ce33 | 1952 | { |
a511ce33 | 1953 | u64 guid = 0; |
a511ce33 | 1954 | |
343d475d | 1955 | if (sbp_parse_wwn(name, &guid) < 0) |
c7d6a803 CH |
1956 | return -EINVAL; |
1957 | return 0; | |
a511ce33 CB |
1958 | } |
1959 | ||
1960 | static int sbp_post_link_lun( | |
1961 | struct se_portal_group *se_tpg, | |
1962 | struct se_lun *se_lun) | |
1963 | { | |
1964 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1965 | ||
1966 | return sbp_update_unit_directory(tpg->tport); | |
1967 | } | |
1968 | ||
1969 | static void sbp_pre_unlink_lun( | |
1970 | struct se_portal_group *se_tpg, | |
1971 | struct se_lun *se_lun) | |
1972 | { | |
1973 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
1974 | struct sbp_tport *tport = tpg->tport; | |
1975 | int ret; | |
1976 | ||
1977 | if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) | |
1978 | tport->enable = 0; | |
1979 | ||
1980 | ret = sbp_update_unit_directory(tport); | |
1981 | if (ret < 0) | |
1982 | pr_err("unlink LUN: failed to update unit directory\n"); | |
1983 | } | |
1984 | ||
aa090eab BVA |
1985 | static struct se_portal_group *sbp_make_tpg(struct se_wwn *wwn, |
1986 | const char *name) | |
a511ce33 CB |
1987 | { |
1988 | struct sbp_tport *tport = | |
1989 | container_of(wwn, struct sbp_tport, tport_wwn); | |
1990 | ||
1991 | struct sbp_tpg *tpg; | |
1992 | unsigned long tpgt; | |
1993 | int ret; | |
1994 | ||
1995 | if (strstr(name, "tpgt_") != name) | |
1996 | return ERR_PTR(-EINVAL); | |
1997 | if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX) | |
1998 | return ERR_PTR(-EINVAL); | |
1999 | ||
2000 | if (tport->tpg) { | |
2001 | pr_err("Only one TPG per Unit is possible.\n"); | |
2002 | return ERR_PTR(-EBUSY); | |
2003 | } | |
2004 | ||
2005 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); | |
e0f3d4c2 | 2006 | if (!tpg) |
a511ce33 | 2007 | return ERR_PTR(-ENOMEM); |
a511ce33 CB |
2008 | |
2009 | tpg->tport = tport; | |
2010 | tpg->tport_tpgt = tpgt; | |
2011 | tport->tpg = tpg; | |
2012 | ||
2013 | /* default attribute values */ | |
2014 | tport->enable = 0; | |
2015 | tport->directory_id = -1; | |
2016 | tport->mgt_orb_timeout = 15; | |
2017 | tport->max_reconnect_timeout = 5; | |
2018 | tport->max_logins_per_lun = 1; | |
2019 | ||
2020 | tport->mgt_agt = sbp_management_agent_register(tport); | |
2021 | if (IS_ERR(tport->mgt_agt)) { | |
2022 | ret = PTR_ERR(tport->mgt_agt); | |
e1fe2060 | 2023 | goto out_free_tpg; |
a511ce33 CB |
2024 | } |
2025 | ||
bc0c94b1 | 2026 | ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_SBP); |
e1fe2060 CB |
2027 | if (ret < 0) |
2028 | goto out_unreg_mgt_agt; | |
a511ce33 CB |
2029 | |
2030 | return &tpg->se_tpg; | |
e1fe2060 CB |
2031 | |
2032 | out_unreg_mgt_agt: | |
2033 | sbp_management_agent_unregister(tport->mgt_agt); | |
2034 | out_free_tpg: | |
2035 | tport->tpg = NULL; | |
2036 | kfree(tpg); | |
2037 | return ERR_PTR(ret); | |
a511ce33 CB |
2038 | } |
2039 | ||
2040 | static void sbp_drop_tpg(struct se_portal_group *se_tpg) | |
2041 | { | |
2042 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); | |
2043 | struct sbp_tport *tport = tpg->tport; | |
2044 | ||
2045 | core_tpg_deregister(se_tpg); | |
2046 | sbp_management_agent_unregister(tport->mgt_agt); | |
2047 | tport->tpg = NULL; | |
2048 | kfree(tpg); | |
2049 | } | |
2050 | ||
2051 | static struct se_wwn *sbp_make_tport( | |
2052 | struct target_fabric_configfs *tf, | |
2053 | struct config_group *group, | |
2054 | const char *name) | |
2055 | { | |
2056 | struct sbp_tport *tport; | |
2057 | u64 guid = 0; | |
2058 | ||
343d475d | 2059 | if (sbp_parse_wwn(name, &guid) < 0) |
a511ce33 CB |
2060 | return ERR_PTR(-EINVAL); |
2061 | ||
2062 | tport = kzalloc(sizeof(*tport), GFP_KERNEL); | |
e0f3d4c2 | 2063 | if (!tport) |
a511ce33 | 2064 | return ERR_PTR(-ENOMEM); |
a511ce33 CB |
2065 | |
2066 | tport->guid = guid; | |
2067 | sbp_format_wwn(tport->tport_name, SBP_NAMELEN, guid); | |
2068 | ||
2069 | return &tport->tport_wwn; | |
2070 | } | |
2071 | ||
2072 | static void sbp_drop_tport(struct se_wwn *wwn) | |
2073 | { | |
2074 | struct sbp_tport *tport = | |
2075 | container_of(wwn, struct sbp_tport, tport_wwn); | |
2076 | ||
2077 | kfree(tport); | |
2078 | } | |
2079 | ||
2eafd729 | 2080 | static ssize_t sbp_wwn_version_show(struct config_item *item, char *page) |
a511ce33 CB |
2081 | { |
2082 | return sprintf(page, "FireWire SBP fabric module %s\n", SBP_VERSION); | |
2083 | } | |
2084 | ||
2eafd729 | 2085 | CONFIGFS_ATTR_RO(sbp_wwn_, version); |
a511ce33 CB |
2086 | |
2087 | static struct configfs_attribute *sbp_wwn_attrs[] = { | |
2eafd729 | 2088 | &sbp_wwn_attr_version, |
a511ce33 CB |
2089 | NULL, |
2090 | }; | |
2091 | ||
2eafd729 | 2092 | static ssize_t sbp_tpg_directory_id_show(struct config_item *item, char *page) |
a511ce33 | 2093 | { |
2eafd729 | 2094 | struct se_portal_group *se_tpg = to_tpg(item); |
a511ce33 CB |
2095 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2096 | struct sbp_tport *tport = tpg->tport; | |
2097 | ||
2098 | if (tport->directory_id == -1) | |
2099 | return sprintf(page, "implicit\n"); | |
2100 | else | |
2101 | return sprintf(page, "%06x\n", tport->directory_id); | |
2102 | } | |
2103 | ||
2eafd729 CH |
2104 | static ssize_t sbp_tpg_directory_id_store(struct config_item *item, |
2105 | const char *page, size_t count) | |
a511ce33 | 2106 | { |
2eafd729 | 2107 | struct se_portal_group *se_tpg = to_tpg(item); |
a511ce33 CB |
2108 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2109 | struct sbp_tport *tport = tpg->tport; | |
2110 | unsigned long val; | |
2111 | ||
2112 | if (tport->enable) { | |
2113 | pr_err("Cannot change the directory_id on an active target.\n"); | |
2114 | return -EBUSY; | |
2115 | } | |
2116 | ||
2117 | if (strstr(page, "implicit") == page) { | |
2118 | tport->directory_id = -1; | |
2119 | } else { | |
2120 | if (kstrtoul(page, 16, &val) < 0) | |
2121 | return -EINVAL; | |
2122 | if (val > 0xffffff) | |
2123 | return -EINVAL; | |
2124 | ||
2125 | tport->directory_id = val; | |
2126 | } | |
2127 | ||
2128 | return count; | |
2129 | } | |
2130 | ||
2eafd729 | 2131 | static ssize_t sbp_tpg_enable_show(struct config_item *item, char *page) |
a511ce33 | 2132 | { |
2eafd729 | 2133 | struct se_portal_group *se_tpg = to_tpg(item); |
a511ce33 CB |
2134 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2135 | struct sbp_tport *tport = tpg->tport; | |
2136 | return sprintf(page, "%d\n", tport->enable); | |
2137 | } | |
2138 | ||
2eafd729 CH |
2139 | static ssize_t sbp_tpg_enable_store(struct config_item *item, |
2140 | const char *page, size_t count) | |
a511ce33 | 2141 | { |
2eafd729 | 2142 | struct se_portal_group *se_tpg = to_tpg(item); |
a511ce33 CB |
2143 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2144 | struct sbp_tport *tport = tpg->tport; | |
2145 | unsigned long val; | |
2146 | int ret; | |
2147 | ||
2148 | if (kstrtoul(page, 0, &val) < 0) | |
2149 | return -EINVAL; | |
2150 | if ((val != 0) && (val != 1)) | |
2151 | return -EINVAL; | |
2152 | ||
2153 | if (tport->enable == val) | |
2154 | return count; | |
2155 | ||
2156 | if (val) { | |
2157 | if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) { | |
2158 | pr_err("Cannot enable a target with no LUNs!\n"); | |
2159 | return -EINVAL; | |
2160 | } | |
2161 | } else { | |
2162 | /* XXX: force-shutdown sessions instead? */ | |
2163 | spin_lock_bh(&se_tpg->session_lock); | |
2164 | if (!list_empty(&se_tpg->tpg_sess_list)) { | |
2165 | spin_unlock_bh(&se_tpg->session_lock); | |
2166 | return -EBUSY; | |
2167 | } | |
2168 | spin_unlock_bh(&se_tpg->session_lock); | |
2169 | } | |
2170 | ||
2171 | tport->enable = val; | |
2172 | ||
2173 | ret = sbp_update_unit_directory(tport); | |
2174 | if (ret < 0) { | |
2175 | pr_err("Could not update Config ROM\n"); | |
2176 | return ret; | |
2177 | } | |
2178 | ||
2179 | return count; | |
2180 | } | |
2181 | ||
2eafd729 CH |
2182 | CONFIGFS_ATTR(sbp_tpg_, directory_id); |
2183 | CONFIGFS_ATTR(sbp_tpg_, enable); | |
a511ce33 CB |
2184 | |
2185 | static struct configfs_attribute *sbp_tpg_base_attrs[] = { | |
2eafd729 CH |
2186 | &sbp_tpg_attr_directory_id, |
2187 | &sbp_tpg_attr_enable, | |
a511ce33 CB |
2188 | NULL, |
2189 | }; | |
2190 | ||
2eafd729 | 2191 | static ssize_t sbp_tpg_attrib_mgt_orb_timeout_show(struct config_item *item, |
a511ce33 CB |
2192 | char *page) |
2193 | { | |
2eafd729 | 2194 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2195 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2196 | struct sbp_tport *tport = tpg->tport; | |
2197 | return sprintf(page, "%d\n", tport->mgt_orb_timeout); | |
2198 | } | |
2199 | ||
2eafd729 CH |
2200 | static ssize_t sbp_tpg_attrib_mgt_orb_timeout_store(struct config_item *item, |
2201 | const char *page, size_t count) | |
a511ce33 | 2202 | { |
2eafd729 | 2203 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2204 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2205 | struct sbp_tport *tport = tpg->tport; | |
2206 | unsigned long val; | |
2207 | int ret; | |
2208 | ||
2209 | if (kstrtoul(page, 0, &val) < 0) | |
2210 | return -EINVAL; | |
2211 | if ((val < 1) || (val > 127)) | |
2212 | return -EINVAL; | |
2213 | ||
2214 | if (tport->mgt_orb_timeout == val) | |
2215 | return count; | |
2216 | ||
2217 | tport->mgt_orb_timeout = val; | |
2218 | ||
2219 | ret = sbp_update_unit_directory(tport); | |
2220 | if (ret < 0) | |
2221 | return ret; | |
2222 | ||
2223 | return count; | |
2224 | } | |
2225 | ||
2eafd729 | 2226 | static ssize_t sbp_tpg_attrib_max_reconnect_timeout_show(struct config_item *item, |
a511ce33 CB |
2227 | char *page) |
2228 | { | |
2eafd729 | 2229 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2230 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2231 | struct sbp_tport *tport = tpg->tport; | |
2232 | return sprintf(page, "%d\n", tport->max_reconnect_timeout); | |
2233 | } | |
2234 | ||
2eafd729 CH |
2235 | static ssize_t sbp_tpg_attrib_max_reconnect_timeout_store(struct config_item *item, |
2236 | const char *page, size_t count) | |
a511ce33 | 2237 | { |
2eafd729 | 2238 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2239 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2240 | struct sbp_tport *tport = tpg->tport; | |
2241 | unsigned long val; | |
2242 | int ret; | |
2243 | ||
2244 | if (kstrtoul(page, 0, &val) < 0) | |
2245 | return -EINVAL; | |
2246 | if ((val < 1) || (val > 32767)) | |
2247 | return -EINVAL; | |
2248 | ||
2249 | if (tport->max_reconnect_timeout == val) | |
2250 | return count; | |
2251 | ||
2252 | tport->max_reconnect_timeout = val; | |
2253 | ||
2254 | ret = sbp_update_unit_directory(tport); | |
2255 | if (ret < 0) | |
2256 | return ret; | |
2257 | ||
2258 | return count; | |
2259 | } | |
2260 | ||
2eafd729 | 2261 | static ssize_t sbp_tpg_attrib_max_logins_per_lun_show(struct config_item *item, |
a511ce33 CB |
2262 | char *page) |
2263 | { | |
2eafd729 | 2264 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2265 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2266 | struct sbp_tport *tport = tpg->tport; | |
2267 | return sprintf(page, "%d\n", tport->max_logins_per_lun); | |
2268 | } | |
2269 | ||
2eafd729 CH |
2270 | static ssize_t sbp_tpg_attrib_max_logins_per_lun_store(struct config_item *item, |
2271 | const char *page, size_t count) | |
a511ce33 | 2272 | { |
2eafd729 | 2273 | struct se_portal_group *se_tpg = attrib_to_tpg(item); |
a511ce33 CB |
2274 | struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg); |
2275 | struct sbp_tport *tport = tpg->tport; | |
2276 | unsigned long val; | |
2277 | ||
2278 | if (kstrtoul(page, 0, &val) < 0) | |
2279 | return -EINVAL; | |
2280 | if ((val < 1) || (val > 127)) | |
2281 | return -EINVAL; | |
2282 | ||
2283 | /* XXX: also check against current count? */ | |
2284 | ||
2285 | tport->max_logins_per_lun = val; | |
2286 | ||
2287 | return count; | |
2288 | } | |
2289 | ||
2eafd729 CH |
2290 | CONFIGFS_ATTR(sbp_tpg_attrib_, mgt_orb_timeout); |
2291 | CONFIGFS_ATTR(sbp_tpg_attrib_, max_reconnect_timeout); | |
2292 | CONFIGFS_ATTR(sbp_tpg_attrib_, max_logins_per_lun); | |
a511ce33 CB |
2293 | |
2294 | static struct configfs_attribute *sbp_tpg_attrib_attrs[] = { | |
2eafd729 CH |
2295 | &sbp_tpg_attrib_attr_mgt_orb_timeout, |
2296 | &sbp_tpg_attrib_attr_max_reconnect_timeout, | |
2297 | &sbp_tpg_attrib_attr_max_logins_per_lun, | |
a511ce33 CB |
2298 | NULL, |
2299 | }; | |
2300 | ||
9ac8928e CH |
2301 | static const struct target_core_fabric_ops sbp_ops = { |
2302 | .module = THIS_MODULE, | |
30c7ca93 | 2303 | .fabric_name = "sbp", |
a511ce33 CB |
2304 | .tpg_get_wwn = sbp_get_fabric_wwn, |
2305 | .tpg_get_tag = sbp_get_tag, | |
a511ce33 CB |
2306 | .tpg_check_demo_mode = sbp_check_true, |
2307 | .tpg_check_demo_mode_cache = sbp_check_true, | |
2308 | .tpg_check_demo_mode_write_protect = sbp_check_false, | |
2309 | .tpg_check_prod_mode_write_protect = sbp_check_false, | |
a511ce33 CB |
2310 | .tpg_get_inst_index = sbp_tpg_get_inst_index, |
2311 | .release_cmd = sbp_release_cmd, | |
a511ce33 CB |
2312 | .sess_get_index = sbp_sess_get_index, |
2313 | .write_pending = sbp_write_pending, | |
a511ce33 | 2314 | .set_default_node_attributes = sbp_set_default_node_attrs, |
a511ce33 CB |
2315 | .get_cmd_state = sbp_get_cmd_state, |
2316 | .queue_data_in = sbp_queue_data_in, | |
2317 | .queue_status = sbp_queue_status, | |
2318 | .queue_tm_rsp = sbp_queue_tm_rsp, | |
131e6abc | 2319 | .aborted_task = sbp_aborted_task, |
a511ce33 CB |
2320 | .check_stop_free = sbp_check_stop_free, |
2321 | ||
2322 | .fabric_make_wwn = sbp_make_tport, | |
2323 | .fabric_drop_wwn = sbp_drop_tport, | |
2324 | .fabric_make_tpg = sbp_make_tpg, | |
2325 | .fabric_drop_tpg = sbp_drop_tpg, | |
2326 | .fabric_post_link = sbp_post_link_lun, | |
2327 | .fabric_pre_unlink = sbp_pre_unlink_lun, | |
2328 | .fabric_make_np = NULL, | |
2329 | .fabric_drop_np = NULL, | |
c7d6a803 | 2330 | .fabric_init_nodeacl = sbp_init_nodeacl, |
a511ce33 | 2331 | |
9ac8928e CH |
2332 | .tfc_wwn_attrs = sbp_wwn_attrs, |
2333 | .tfc_tpg_base_attrs = sbp_tpg_base_attrs, | |
2334 | .tfc_tpg_attrib_attrs = sbp_tpg_attrib_attrs, | |
a511ce33 CB |
2335 | }; |
2336 | ||
2337 | static int __init sbp_init(void) | |
2338 | { | |
9ac8928e | 2339 | return target_register_template(&sbp_ops); |
a511ce33 CB |
2340 | }; |
2341 | ||
63b91d5a | 2342 | static void __exit sbp_exit(void) |
a511ce33 | 2343 | { |
9ac8928e | 2344 | target_unregister_template(&sbp_ops); |
a511ce33 CB |
2345 | }; |
2346 | ||
2347 | MODULE_DESCRIPTION("FireWire SBP fabric driver"); | |
2348 | MODULE_LICENSE("GPL"); | |
2349 | module_init(sbp_init); | |
2350 | module_exit(sbp_exit); |