Commit | Line | Data |
---|---|---|
aef9ec39 RD |
1 | /* |
2 | * Copyright (c) 2005 Cisco Systems. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | * | |
32 | * $Id: ib_srp.c 3932 2005-11-01 17:19:29Z roland $ | |
33 | */ | |
34 | ||
aef9ec39 RD |
35 | #include <linux/module.h> |
36 | #include <linux/init.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/err.h> | |
39 | #include <linux/string.h> | |
40 | #include <linux/parser.h> | |
41 | #include <linux/random.h> | |
de25968c | 42 | #include <linux/jiffies.h> |
aef9ec39 RD |
43 | |
44 | #include <asm/atomic.h> | |
45 | ||
46 | #include <scsi/scsi.h> | |
47 | #include <scsi/scsi_device.h> | |
48 | #include <scsi/scsi_dbg.h> | |
49 | #include <scsi/srp.h> | |
50 | ||
51 | #include <rdma/ib_cache.h> | |
52 | ||
53 | #include "ib_srp.h" | |
54 | ||
55 | #define DRV_NAME "ib_srp" | |
56 | #define PFX DRV_NAME ": " | |
57 | #define DRV_VERSION "0.2" | |
58 | #define DRV_RELDATE "November 1, 2005" | |
59 | ||
60 | MODULE_AUTHOR("Roland Dreier"); | |
61 | MODULE_DESCRIPTION("InfiniBand SCSI RDMA Protocol initiator " | |
62 | "v" DRV_VERSION " (" DRV_RELDATE ")"); | |
63 | MODULE_LICENSE("Dual BSD/GPL"); | |
64 | ||
74b0a15b VP |
65 | static int srp_sg_tablesize = SRP_DEF_SG_TABLESIZE; |
66 | static int srp_max_iu_len; | |
67 | ||
68 | module_param(srp_sg_tablesize, int, 0444); | |
69 | MODULE_PARM_DESC(srp_sg_tablesize, | |
70 | "Max number of gather/scatter entries per I/O (default is 12)"); | |
71 | ||
aef9ec39 RD |
72 | static int topspin_workarounds = 1; |
73 | ||
74 | module_param(topspin_workarounds, int, 0444); | |
75 | MODULE_PARM_DESC(topspin_workarounds, | |
76 | "Enable workarounds for Topspin/Cisco SRP target bugs if != 0"); | |
77 | ||
78 | static const u8 topspin_oui[3] = { 0x00, 0x05, 0xad }; | |
79 | ||
80 | static void srp_add_one(struct ib_device *device); | |
81 | static void srp_remove_one(struct ib_device *device); | |
82 | static void srp_completion(struct ib_cq *cq, void *target_ptr); | |
83 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event); | |
84 | ||
85 | static struct ib_client srp_client = { | |
86 | .name = "srp", | |
87 | .add = srp_add_one, | |
88 | .remove = srp_remove_one | |
89 | }; | |
90 | ||
91 | static inline struct srp_target_port *host_to_target(struct Scsi_Host *host) | |
92 | { | |
93 | return (struct srp_target_port *) host->hostdata; | |
94 | } | |
95 | ||
96 | static const char *srp_target_info(struct Scsi_Host *host) | |
97 | { | |
98 | return host_to_target(host)->target_name; | |
99 | } | |
100 | ||
101 | static struct srp_iu *srp_alloc_iu(struct srp_host *host, size_t size, | |
102 | gfp_t gfp_mask, | |
103 | enum dma_data_direction direction) | |
104 | { | |
105 | struct srp_iu *iu; | |
106 | ||
107 | iu = kmalloc(sizeof *iu, gfp_mask); | |
108 | if (!iu) | |
109 | goto out; | |
110 | ||
111 | iu->buf = kzalloc(size, gfp_mask); | |
112 | if (!iu->buf) | |
113 | goto out_free_iu; | |
114 | ||
f5358a17 RD |
115 | iu->dma = dma_map_single(host->dev->dev->dma_device, |
116 | iu->buf, size, direction); | |
aef9ec39 RD |
117 | if (dma_mapping_error(iu->dma)) |
118 | goto out_free_buf; | |
119 | ||
120 | iu->size = size; | |
121 | iu->direction = direction; | |
122 | ||
123 | return iu; | |
124 | ||
125 | out_free_buf: | |
126 | kfree(iu->buf); | |
127 | out_free_iu: | |
128 | kfree(iu); | |
129 | out: | |
130 | return NULL; | |
131 | } | |
132 | ||
133 | static void srp_free_iu(struct srp_host *host, struct srp_iu *iu) | |
134 | { | |
135 | if (!iu) | |
136 | return; | |
137 | ||
f5358a17 RD |
138 | dma_unmap_single(host->dev->dev->dma_device, |
139 | iu->dma, iu->size, iu->direction); | |
aef9ec39 RD |
140 | kfree(iu->buf); |
141 | kfree(iu); | |
142 | } | |
143 | ||
144 | static void srp_qp_event(struct ib_event *event, void *context) | |
145 | { | |
146 | printk(KERN_ERR PFX "QP event %d\n", event->event); | |
147 | } | |
148 | ||
149 | static int srp_init_qp(struct srp_target_port *target, | |
150 | struct ib_qp *qp) | |
151 | { | |
152 | struct ib_qp_attr *attr; | |
153 | int ret; | |
154 | ||
155 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
156 | if (!attr) | |
157 | return -ENOMEM; | |
158 | ||
f5358a17 | 159 | ret = ib_find_cached_pkey(target->srp_host->dev->dev, |
aef9ec39 RD |
160 | target->srp_host->port, |
161 | be16_to_cpu(target->path.pkey), | |
162 | &attr->pkey_index); | |
163 | if (ret) | |
164 | goto out; | |
165 | ||
166 | attr->qp_state = IB_QPS_INIT; | |
167 | attr->qp_access_flags = (IB_ACCESS_REMOTE_READ | | |
168 | IB_ACCESS_REMOTE_WRITE); | |
169 | attr->port_num = target->srp_host->port; | |
170 | ||
171 | ret = ib_modify_qp(qp, attr, | |
172 | IB_QP_STATE | | |
173 | IB_QP_PKEY_INDEX | | |
174 | IB_QP_ACCESS_FLAGS | | |
175 | IB_QP_PORT); | |
176 | ||
177 | out: | |
178 | kfree(attr); | |
179 | return ret; | |
180 | } | |
181 | ||
182 | static int srp_create_target_ib(struct srp_target_port *target) | |
183 | { | |
184 | struct ib_qp_init_attr *init_attr; | |
185 | int ret; | |
186 | ||
187 | init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); | |
188 | if (!init_attr) | |
189 | return -ENOMEM; | |
190 | ||
f5358a17 | 191 | target->cq = ib_create_cq(target->srp_host->dev->dev, srp_completion, |
aef9ec39 RD |
192 | NULL, target, SRP_CQ_SIZE); |
193 | if (IS_ERR(target->cq)) { | |
194 | ret = PTR_ERR(target->cq); | |
195 | goto out; | |
196 | } | |
197 | ||
198 | ib_req_notify_cq(target->cq, IB_CQ_NEXT_COMP); | |
199 | ||
200 | init_attr->event_handler = srp_qp_event; | |
201 | init_attr->cap.max_send_wr = SRP_SQ_SIZE; | |
202 | init_attr->cap.max_recv_wr = SRP_RQ_SIZE; | |
203 | init_attr->cap.max_recv_sge = 1; | |
204 | init_attr->cap.max_send_sge = 1; | |
205 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
206 | init_attr->qp_type = IB_QPT_RC; | |
207 | init_attr->send_cq = target->cq; | |
208 | init_attr->recv_cq = target->cq; | |
209 | ||
f5358a17 | 210 | target->qp = ib_create_qp(target->srp_host->dev->pd, init_attr); |
aef9ec39 RD |
211 | if (IS_ERR(target->qp)) { |
212 | ret = PTR_ERR(target->qp); | |
213 | ib_destroy_cq(target->cq); | |
214 | goto out; | |
215 | } | |
216 | ||
217 | ret = srp_init_qp(target, target->qp); | |
218 | if (ret) { | |
219 | ib_destroy_qp(target->qp); | |
220 | ib_destroy_cq(target->cq); | |
221 | goto out; | |
222 | } | |
223 | ||
224 | out: | |
225 | kfree(init_attr); | |
226 | return ret; | |
227 | } | |
228 | ||
229 | static void srp_free_target_ib(struct srp_target_port *target) | |
230 | { | |
231 | int i; | |
232 | ||
233 | ib_destroy_qp(target->qp); | |
234 | ib_destroy_cq(target->cq); | |
235 | ||
236 | for (i = 0; i < SRP_RQ_SIZE; ++i) | |
237 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
238 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) | |
239 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
240 | } | |
241 | ||
242 | static void srp_path_rec_completion(int status, | |
243 | struct ib_sa_path_rec *pathrec, | |
244 | void *target_ptr) | |
245 | { | |
246 | struct srp_target_port *target = target_ptr; | |
247 | ||
248 | target->status = status; | |
249 | if (status) | |
250 | printk(KERN_ERR PFX "Got failed path rec status %d\n", status); | |
251 | else | |
252 | target->path = *pathrec; | |
253 | complete(&target->done); | |
254 | } | |
255 | ||
256 | static int srp_lookup_path(struct srp_target_port *target) | |
257 | { | |
258 | target->path.numb_path = 1; | |
259 | ||
260 | init_completion(&target->done); | |
261 | ||
f5358a17 | 262 | target->path_query_id = ib_sa_path_rec_get(target->srp_host->dev->dev, |
aef9ec39 RD |
263 | target->srp_host->port, |
264 | &target->path, | |
265 | IB_SA_PATH_REC_DGID | | |
266 | IB_SA_PATH_REC_SGID | | |
267 | IB_SA_PATH_REC_NUMB_PATH | | |
268 | IB_SA_PATH_REC_PKEY, | |
269 | SRP_PATH_REC_TIMEOUT_MS, | |
270 | GFP_KERNEL, | |
271 | srp_path_rec_completion, | |
272 | target, &target->path_query); | |
273 | if (target->path_query_id < 0) | |
274 | return target->path_query_id; | |
275 | ||
276 | wait_for_completion(&target->done); | |
277 | ||
278 | if (target->status < 0) | |
279 | printk(KERN_WARNING PFX "Path record query failed\n"); | |
280 | ||
281 | return target->status; | |
282 | } | |
283 | ||
284 | static int srp_send_req(struct srp_target_port *target) | |
285 | { | |
286 | struct { | |
287 | struct ib_cm_req_param param; | |
288 | struct srp_login_req priv; | |
289 | } *req = NULL; | |
290 | int status; | |
291 | ||
292 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
293 | if (!req) | |
294 | return -ENOMEM; | |
295 | ||
296 | req->param.primary_path = &target->path; | |
297 | req->param.alternate_path = NULL; | |
298 | req->param.service_id = target->service_id; | |
299 | req->param.qp_num = target->qp->qp_num; | |
300 | req->param.qp_type = target->qp->qp_type; | |
301 | req->param.private_data = &req->priv; | |
302 | req->param.private_data_len = sizeof req->priv; | |
303 | req->param.flow_control = 1; | |
304 | ||
305 | get_random_bytes(&req->param.starting_psn, 4); | |
306 | req->param.starting_psn &= 0xffffff; | |
307 | ||
308 | /* | |
309 | * Pick some arbitrary defaults here; we could make these | |
310 | * module parameters if anyone cared about setting them. | |
311 | */ | |
312 | req->param.responder_resources = 4; | |
313 | req->param.remote_cm_response_timeout = 20; | |
314 | req->param.local_cm_response_timeout = 20; | |
315 | req->param.retry_count = 7; | |
316 | req->param.rnr_retry_count = 7; | |
317 | req->param.max_cm_retries = 15; | |
318 | ||
319 | req->priv.opcode = SRP_LOGIN_REQ; | |
320 | req->priv.tag = 0; | |
74b0a15b | 321 | req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); |
aef9ec39 RD |
322 | req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | |
323 | SRP_BUF_FORMAT_INDIRECT); | |
324 | memcpy(req->priv.initiator_port_id, target->srp_host->initiator_port_id, 16); | |
325 | /* | |
326 | * Topspin/Cisco SRP targets will reject our login unless we | |
327 | * zero out the first 8 bytes of our initiator port ID. The | |
328 | * second 8 bytes must be our local node GUID, but we always | |
329 | * use that anyway. | |
330 | */ | |
331 | if (topspin_workarounds && !memcmp(&target->ioc_guid, topspin_oui, 3)) { | |
332 | printk(KERN_DEBUG PFX "Topspin/Cisco initiator port ID workaround " | |
333 | "activated for target GUID %016llx\n", | |
334 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
335 | memset(req->priv.initiator_port_id, 0, 8); | |
336 | } | |
337 | memcpy(req->priv.target_port_id, &target->id_ext, 8); | |
338 | memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); | |
339 | ||
340 | status = ib_send_cm_req(target->cm_id, &req->param); | |
341 | ||
342 | kfree(req); | |
343 | ||
344 | return status; | |
345 | } | |
346 | ||
347 | static void srp_disconnect_target(struct srp_target_port *target) | |
348 | { | |
349 | /* XXX should send SRP_I_LOGOUT request */ | |
350 | ||
351 | init_completion(&target->done); | |
e6581056 RD |
352 | if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { |
353 | printk(KERN_DEBUG PFX "Sending CM DREQ failed\n"); | |
354 | return; | |
355 | } | |
aef9ec39 RD |
356 | wait_for_completion(&target->done); |
357 | } | |
358 | ||
359 | static void srp_remove_work(void *target_ptr) | |
360 | { | |
361 | struct srp_target_port *target = target_ptr; | |
362 | ||
363 | spin_lock_irq(target->scsi_host->host_lock); | |
364 | if (target->state != SRP_TARGET_DEAD) { | |
365 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 RD |
366 | return; |
367 | } | |
368 | target->state = SRP_TARGET_REMOVED; | |
369 | spin_unlock_irq(target->scsi_host->host_lock); | |
370 | ||
b3589fd4 | 371 | spin_lock(&target->srp_host->target_lock); |
aef9ec39 | 372 | list_del(&target->list); |
b3589fd4 | 373 | spin_unlock(&target->srp_host->target_lock); |
aef9ec39 RD |
374 | |
375 | scsi_remove_host(target->scsi_host); | |
376 | ib_destroy_cm_id(target->cm_id); | |
377 | srp_free_target_ib(target); | |
378 | scsi_host_put(target->scsi_host); | |
aef9ec39 RD |
379 | } |
380 | ||
381 | static int srp_connect_target(struct srp_target_port *target) | |
382 | { | |
383 | int ret; | |
384 | ||
385 | ret = srp_lookup_path(target); | |
386 | if (ret) | |
387 | return ret; | |
388 | ||
389 | while (1) { | |
390 | init_completion(&target->done); | |
391 | ret = srp_send_req(target); | |
392 | if (ret) | |
393 | return ret; | |
394 | wait_for_completion(&target->done); | |
395 | ||
396 | /* | |
397 | * The CM event handling code will set status to | |
398 | * SRP_PORT_REDIRECT if we get a port redirect REJ | |
399 | * back, or SRP_DLID_REDIRECT if we get a lid/qp | |
400 | * redirect REJ back. | |
401 | */ | |
402 | switch (target->status) { | |
403 | case 0: | |
404 | return 0; | |
405 | ||
406 | case SRP_PORT_REDIRECT: | |
407 | ret = srp_lookup_path(target); | |
408 | if (ret) | |
409 | return ret; | |
410 | break; | |
411 | ||
412 | case SRP_DLID_REDIRECT: | |
413 | break; | |
414 | ||
415 | default: | |
416 | return target->status; | |
417 | } | |
418 | } | |
419 | } | |
420 | ||
d945e1df RD |
421 | static void srp_unmap_data(struct scsi_cmnd *scmnd, |
422 | struct srp_target_port *target, | |
423 | struct srp_request *req) | |
424 | { | |
425 | struct scatterlist *scat; | |
426 | int nents; | |
427 | ||
428 | if (!scmnd->request_buffer || | |
429 | (scmnd->sc_data_direction != DMA_TO_DEVICE && | |
430 | scmnd->sc_data_direction != DMA_FROM_DEVICE)) | |
431 | return; | |
432 | ||
f5358a17 RD |
433 | if (req->fmr) { |
434 | ib_fmr_pool_unmap(req->fmr); | |
435 | req->fmr = NULL; | |
436 | } | |
437 | ||
d945e1df RD |
438 | /* |
439 | * This handling of non-SG commands can be killed when the | |
440 | * SCSI midlayer no longer generates non-SG commands. | |
441 | */ | |
442 | if (likely(scmnd->use_sg)) { | |
443 | nents = scmnd->use_sg; | |
444 | scat = scmnd->request_buffer; | |
445 | } else { | |
446 | nents = 1; | |
447 | scat = &req->fake_sg; | |
448 | } | |
449 | ||
f5358a17 | 450 | dma_unmap_sg(target->srp_host->dev->dev->dma_device, scat, nents, |
d945e1df RD |
451 | scmnd->sc_data_direction); |
452 | } | |
453 | ||
aef9ec39 RD |
454 | static int srp_reconnect_target(struct srp_target_port *target) |
455 | { | |
456 | struct ib_cm_id *new_cm_id; | |
457 | struct ib_qp_attr qp_attr; | |
458 | struct srp_request *req; | |
459 | struct ib_wc wc; | |
460 | int ret; | |
461 | int i; | |
462 | ||
463 | spin_lock_irq(target->scsi_host->host_lock); | |
464 | if (target->state != SRP_TARGET_LIVE) { | |
465 | spin_unlock_irq(target->scsi_host->host_lock); | |
466 | return -EAGAIN; | |
467 | } | |
468 | target->state = SRP_TARGET_CONNECTING; | |
469 | spin_unlock_irq(target->scsi_host->host_lock); | |
470 | ||
471 | srp_disconnect_target(target); | |
472 | /* | |
473 | * Now get a new local CM ID so that we avoid confusing the | |
474 | * target in case things are really fouled up. | |
475 | */ | |
f5358a17 | 476 | new_cm_id = ib_create_cm_id(target->srp_host->dev->dev, |
aef9ec39 RD |
477 | srp_cm_handler, target); |
478 | if (IS_ERR(new_cm_id)) { | |
479 | ret = PTR_ERR(new_cm_id); | |
480 | goto err; | |
481 | } | |
482 | ib_destroy_cm_id(target->cm_id); | |
483 | target->cm_id = new_cm_id; | |
484 | ||
485 | qp_attr.qp_state = IB_QPS_RESET; | |
486 | ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); | |
487 | if (ret) | |
488 | goto err; | |
489 | ||
490 | ret = srp_init_qp(target, target->qp); | |
491 | if (ret) | |
492 | goto err; | |
493 | ||
494 | while (ib_poll_cq(target->cq, 1, &wc) > 0) | |
495 | ; /* nothing */ | |
496 | ||
497 | list_for_each_entry(req, &target->req_queue, list) { | |
498 | req->scmnd->result = DID_RESET << 16; | |
499 | req->scmnd->scsi_done(req->scmnd); | |
d945e1df | 500 | srp_unmap_data(req->scmnd, target, req); |
aef9ec39 RD |
501 | } |
502 | ||
503 | target->rx_head = 0; | |
504 | target->tx_head = 0; | |
505 | target->tx_tail = 0; | |
d945e1df | 506 | INIT_LIST_HEAD(&target->free_reqs); |
aef9ec39 | 507 | INIT_LIST_HEAD(&target->req_queue); |
d945e1df RD |
508 | for (i = 0; i < SRP_SQ_SIZE; ++i) |
509 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
aef9ec39 RD |
510 | |
511 | ret = srp_connect_target(target); | |
512 | if (ret) | |
513 | goto err; | |
514 | ||
515 | spin_lock_irq(target->scsi_host->host_lock); | |
516 | if (target->state == SRP_TARGET_CONNECTING) { | |
517 | ret = 0; | |
518 | target->state = SRP_TARGET_LIVE; | |
519 | } else | |
520 | ret = -EAGAIN; | |
521 | spin_unlock_irq(target->scsi_host->host_lock); | |
522 | ||
523 | return ret; | |
524 | ||
525 | err: | |
526 | printk(KERN_ERR PFX "reconnect failed (%d), removing target port.\n", ret); | |
527 | ||
528 | /* | |
529 | * We couldn't reconnect, so kill our target port off. | |
530 | * However, we have to defer the real removal because we might | |
531 | * be in the context of the SCSI error handler now, which | |
532 | * would deadlock if we call scsi_remove_host(). | |
533 | */ | |
534 | spin_lock_irq(target->scsi_host->host_lock); | |
535 | if (target->state == SRP_TARGET_CONNECTING) { | |
536 | target->state = SRP_TARGET_DEAD; | |
537 | INIT_WORK(&target->work, srp_remove_work, target); | |
538 | schedule_work(&target->work); | |
539 | } | |
540 | spin_unlock_irq(target->scsi_host->host_lock); | |
541 | ||
542 | return ret; | |
543 | } | |
544 | ||
f5358a17 RD |
545 | static int srp_map_fmr(struct srp_device *dev, struct scatterlist *scat, |
546 | int sg_cnt, struct srp_request *req, | |
547 | struct srp_direct_buf *buf) | |
548 | { | |
549 | u64 io_addr = 0; | |
550 | u64 *dma_pages; | |
551 | u32 len; | |
552 | int page_cnt; | |
553 | int i, j; | |
554 | int ret; | |
555 | ||
556 | if (!dev->fmr_pool) | |
557 | return -ENODEV; | |
558 | ||
559 | len = page_cnt = 0; | |
560 | for (i = 0; i < sg_cnt; ++i) { | |
561 | if (sg_dma_address(&scat[i]) & ~dev->fmr_page_mask) { | |
562 | if (i > 0) | |
563 | return -EINVAL; | |
564 | else | |
565 | ++page_cnt; | |
566 | } | |
567 | if ((sg_dma_address(&scat[i]) + sg_dma_len(&scat[i])) & | |
568 | ~dev->fmr_page_mask) { | |
569 | if (i < sg_cnt - 1) | |
570 | return -EINVAL; | |
571 | else | |
572 | ++page_cnt; | |
573 | } | |
574 | ||
575 | len += sg_dma_len(&scat[i]); | |
576 | } | |
577 | ||
578 | page_cnt += len >> dev->fmr_page_shift; | |
579 | if (page_cnt > SRP_FMR_SIZE) | |
580 | return -ENOMEM; | |
581 | ||
582 | dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); | |
583 | if (!dma_pages) | |
584 | return -ENOMEM; | |
585 | ||
586 | page_cnt = 0; | |
587 | for (i = 0; i < sg_cnt; ++i) | |
588 | for (j = 0; j < sg_dma_len(&scat[i]); j += dev->fmr_page_size) | |
589 | dma_pages[page_cnt++] = | |
590 | (sg_dma_address(&scat[i]) & dev->fmr_page_mask) + j; | |
591 | ||
592 | req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, | |
593 | dma_pages, page_cnt, &io_addr); | |
594 | if (IS_ERR(req->fmr)) { | |
595 | ret = PTR_ERR(req->fmr); | |
596 | goto out; | |
597 | } | |
598 | ||
599 | buf->va = cpu_to_be64(sg_dma_address(&scat[0]) & ~dev->fmr_page_mask); | |
600 | buf->key = cpu_to_be32(req->fmr->fmr->rkey); | |
601 | buf->len = cpu_to_be32(len); | |
602 | ||
603 | ret = 0; | |
604 | ||
605 | out: | |
606 | kfree(dma_pages); | |
607 | ||
608 | return ret; | |
609 | } | |
610 | ||
aef9ec39 RD |
611 | static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, |
612 | struct srp_request *req) | |
613 | { | |
cf368713 | 614 | struct scatterlist *scat; |
aef9ec39 | 615 | struct srp_cmd *cmd = req->cmd->buf; |
cf368713 | 616 | int len, nents, count; |
f5358a17 | 617 | u8 fmt = SRP_DATA_DESC_DIRECT; |
aef9ec39 RD |
618 | |
619 | if (!scmnd->request_buffer || scmnd->sc_data_direction == DMA_NONE) | |
620 | return sizeof (struct srp_cmd); | |
621 | ||
622 | if (scmnd->sc_data_direction != DMA_FROM_DEVICE && | |
623 | scmnd->sc_data_direction != DMA_TO_DEVICE) { | |
624 | printk(KERN_WARNING PFX "Unhandled data direction %d\n", | |
625 | scmnd->sc_data_direction); | |
626 | return -EINVAL; | |
627 | } | |
628 | ||
cf368713 RD |
629 | /* |
630 | * This handling of non-SG commands can be killed when the | |
631 | * SCSI midlayer no longer generates non-SG commands. | |
632 | */ | |
633 | if (likely(scmnd->use_sg)) { | |
634 | nents = scmnd->use_sg; | |
635 | scat = scmnd->request_buffer; | |
636 | } else { | |
637 | nents = 1; | |
638 | scat = &req->fake_sg; | |
639 | sg_init_one(scat, scmnd->request_buffer, scmnd->request_bufflen); | |
640 | } | |
aef9ec39 | 641 | |
f5358a17 RD |
642 | count = dma_map_sg(target->srp_host->dev->dev->dma_device, |
643 | scat, nents, scmnd->sc_data_direction); | |
644 | ||
645 | fmt = SRP_DATA_DESC_DIRECT; | |
646 | len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); | |
aef9ec39 | 647 | |
cf368713 | 648 | if (count == 1) { |
f5358a17 RD |
649 | /* |
650 | * The midlayer only generated a single gather/scatter | |
651 | * entry, or DMA mapping coalesced everything to a | |
652 | * single entry. So a direct descriptor along with | |
653 | * the DMA MR suffices. | |
654 | */ | |
cf368713 | 655 | struct srp_direct_buf *buf = (void *) cmd->add_data; |
aef9ec39 | 656 | |
cf368713 | 657 | buf->va = cpu_to_be64(sg_dma_address(scat)); |
f5358a17 | 658 | buf->key = cpu_to_be32(target->srp_host->dev->mr->rkey); |
cf368713 | 659 | buf->len = cpu_to_be32(sg_dma_len(scat)); |
f5358a17 RD |
660 | } else if (srp_map_fmr(target->srp_host->dev, scat, count, req, |
661 | (void *) cmd->add_data)) { | |
662 | /* | |
663 | * FMR mapping failed, and the scatterlist has more | |
664 | * than one entry. Generate an indirect memory | |
665 | * descriptor. | |
666 | */ | |
cf368713 RD |
667 | struct srp_indirect_buf *buf = (void *) cmd->add_data; |
668 | u32 datalen = 0; | |
f5358a17 | 669 | int i; |
aef9ec39 | 670 | |
cf368713 | 671 | fmt = SRP_DATA_DESC_INDIRECT; |
f5358a17 RD |
672 | len = sizeof (struct srp_cmd) + |
673 | sizeof (struct srp_indirect_buf) + | |
674 | count * sizeof (struct srp_direct_buf); | |
675 | ||
676 | for (i = 0; i < count; ++i) { | |
677 | buf->desc_list[i].va = | |
678 | cpu_to_be64(sg_dma_address(&scat[i])); | |
679 | buf->desc_list[i].key = | |
680 | cpu_to_be32(target->srp_host->dev->mr->rkey); | |
681 | buf->desc_list[i].len = | |
682 | cpu_to_be32(sg_dma_len(&scat[i])); | |
683 | datalen += sg_dma_len(&scat[i]); | |
684 | } | |
aef9ec39 | 685 | |
cf368713 RD |
686 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) |
687 | cmd->data_out_desc_cnt = count; | |
688 | else | |
689 | cmd->data_in_desc_cnt = count; | |
690 | ||
f5358a17 RD |
691 | buf->table_desc.va = |
692 | cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); | |
cf368713 | 693 | buf->table_desc.key = |
f5358a17 | 694 | cpu_to_be32(target->srp_host->dev->mr->rkey); |
cf368713 RD |
695 | buf->table_desc.len = |
696 | cpu_to_be32(count * sizeof (struct srp_direct_buf)); | |
697 | ||
cf368713 | 698 | buf->len = cpu_to_be32(datalen); |
aef9ec39 RD |
699 | } |
700 | ||
701 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) | |
702 | cmd->buf_fmt = fmt << 4; | |
703 | else | |
704 | cmd->buf_fmt = fmt; | |
705 | ||
aef9ec39 RD |
706 | return len; |
707 | } | |
708 | ||
d945e1df | 709 | static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) |
f80887d0 | 710 | { |
d945e1df RD |
711 | srp_unmap_data(req->scmnd, target, req); |
712 | list_move_tail(&req->list, &target->free_reqs); | |
f80887d0 RD |
713 | } |
714 | ||
aef9ec39 RD |
715 | static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) |
716 | { | |
717 | struct srp_request *req; | |
718 | struct scsi_cmnd *scmnd; | |
719 | unsigned long flags; | |
720 | s32 delta; | |
721 | ||
722 | delta = (s32) be32_to_cpu(rsp->req_lim_delta); | |
723 | ||
724 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
725 | ||
726 | target->req_lim += delta; | |
727 | ||
728 | req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT]; | |
729 | ||
730 | if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { | |
731 | if (be32_to_cpu(rsp->resp_data_len) < 4) | |
732 | req->tsk_status = -1; | |
733 | else | |
734 | req->tsk_status = rsp->data[3]; | |
735 | complete(&req->done); | |
736 | } else { | |
d945e1df | 737 | scmnd = req->scmnd; |
aef9ec39 RD |
738 | if (!scmnd) |
739 | printk(KERN_ERR "Null scmnd for RSP w/tag %016llx\n", | |
740 | (unsigned long long) rsp->tag); | |
741 | scmnd->result = rsp->status; | |
742 | ||
743 | if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { | |
744 | memcpy(scmnd->sense_buffer, rsp->data + | |
745 | be32_to_cpu(rsp->resp_data_len), | |
746 | min_t(int, be32_to_cpu(rsp->sense_data_len), | |
747 | SCSI_SENSE_BUFFERSIZE)); | |
748 | } | |
749 | ||
750 | if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) | |
751 | scmnd->resid = be32_to_cpu(rsp->data_out_res_cnt); | |
752 | else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) | |
753 | scmnd->resid = be32_to_cpu(rsp->data_in_res_cnt); | |
754 | ||
aef9ec39 | 755 | if (!req->tsk_mgmt) { |
aef9ec39 RD |
756 | scmnd->host_scribble = (void *) -1L; |
757 | scmnd->scsi_done(scmnd); | |
758 | ||
d945e1df | 759 | srp_remove_req(target, req); |
aef9ec39 RD |
760 | } else |
761 | req->cmd_done = 1; | |
762 | } | |
763 | ||
764 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
765 | } | |
766 | ||
767 | static void srp_reconnect_work(void *target_ptr) | |
768 | { | |
769 | struct srp_target_port *target = target_ptr; | |
770 | ||
771 | srp_reconnect_target(target); | |
772 | } | |
773 | ||
774 | static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) | |
775 | { | |
776 | struct srp_iu *iu; | |
777 | u8 opcode; | |
778 | ||
779 | iu = target->rx_ring[wc->wr_id & ~SRP_OP_RECV]; | |
780 | ||
f5358a17 | 781 | dma_sync_single_for_cpu(target->srp_host->dev->dev->dma_device, iu->dma, |
aef9ec39 RD |
782 | target->max_ti_iu_len, DMA_FROM_DEVICE); |
783 | ||
784 | opcode = *(u8 *) iu->buf; | |
785 | ||
786 | if (0) { | |
787 | int i; | |
788 | ||
789 | printk(KERN_ERR PFX "recv completion, opcode 0x%02x\n", opcode); | |
790 | ||
791 | for (i = 0; i < wc->byte_len; ++i) { | |
792 | if (i % 8 == 0) | |
793 | printk(KERN_ERR " [%02x] ", i); | |
794 | printk(" %02x", ((u8 *) iu->buf)[i]); | |
795 | if ((i + 1) % 8 == 0) | |
796 | printk("\n"); | |
797 | } | |
798 | ||
799 | if (wc->byte_len % 8) | |
800 | printk("\n"); | |
801 | } | |
802 | ||
803 | switch (opcode) { | |
804 | case SRP_RSP: | |
805 | srp_process_rsp(target, iu->buf); | |
806 | break; | |
807 | ||
808 | case SRP_T_LOGOUT: | |
809 | /* XXX Handle target logout */ | |
810 | printk(KERN_WARNING PFX "Got target logout request\n"); | |
811 | break; | |
812 | ||
813 | default: | |
814 | printk(KERN_WARNING PFX "Unhandled SRP opcode 0x%02x\n", opcode); | |
815 | break; | |
816 | } | |
817 | ||
f5358a17 | 818 | dma_sync_single_for_device(target->srp_host->dev->dev->dma_device, iu->dma, |
aef9ec39 RD |
819 | target->max_ti_iu_len, DMA_FROM_DEVICE); |
820 | } | |
821 | ||
822 | static void srp_completion(struct ib_cq *cq, void *target_ptr) | |
823 | { | |
824 | struct srp_target_port *target = target_ptr; | |
825 | struct ib_wc wc; | |
826 | unsigned long flags; | |
827 | ||
828 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
829 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
830 | if (wc.status) { | |
831 | printk(KERN_ERR PFX "failed %s status %d\n", | |
832 | wc.wr_id & SRP_OP_RECV ? "receive" : "send", | |
833 | wc.status); | |
834 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
835 | if (target->state == SRP_TARGET_LIVE) | |
836 | schedule_work(&target->work); | |
837 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
838 | break; | |
839 | } | |
840 | ||
841 | if (wc.wr_id & SRP_OP_RECV) | |
842 | srp_handle_recv(target, &wc); | |
843 | else | |
844 | ++target->tx_tail; | |
845 | } | |
846 | } | |
847 | ||
848 | static int __srp_post_recv(struct srp_target_port *target) | |
849 | { | |
850 | struct srp_iu *iu; | |
851 | struct ib_sge list; | |
852 | struct ib_recv_wr wr, *bad_wr; | |
853 | unsigned int next; | |
854 | int ret; | |
855 | ||
856 | next = target->rx_head & (SRP_RQ_SIZE - 1); | |
857 | wr.wr_id = next | SRP_OP_RECV; | |
858 | iu = target->rx_ring[next]; | |
859 | ||
860 | list.addr = iu->dma; | |
861 | list.length = iu->size; | |
f5358a17 | 862 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
863 | |
864 | wr.next = NULL; | |
865 | wr.sg_list = &list; | |
866 | wr.num_sge = 1; | |
867 | ||
868 | ret = ib_post_recv(target->qp, &wr, &bad_wr); | |
869 | if (!ret) | |
870 | ++target->rx_head; | |
871 | ||
872 | return ret; | |
873 | } | |
874 | ||
875 | static int srp_post_recv(struct srp_target_port *target) | |
876 | { | |
877 | unsigned long flags; | |
878 | int ret; | |
879 | ||
880 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
881 | ret = __srp_post_recv(target); | |
882 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
883 | ||
884 | return ret; | |
885 | } | |
886 | ||
887 | /* | |
888 | * Must be called with target->scsi_host->host_lock held to protect | |
47f2bce9 RD |
889 | * req_lim and tx_head. Lock cannot be dropped between call here and |
890 | * call to __srp_post_send(). | |
aef9ec39 RD |
891 | */ |
892 | static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target) | |
893 | { | |
894 | if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) | |
895 | return NULL; | |
896 | ||
47f2bce9 RD |
897 | if (unlikely(target->req_lim < 1)) { |
898 | if (printk_ratelimit()) | |
899 | printk(KERN_DEBUG PFX "Target has req_lim %d\n", | |
900 | target->req_lim); | |
901 | return NULL; | |
902 | } | |
903 | ||
aef9ec39 RD |
904 | return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; |
905 | } | |
906 | ||
907 | /* | |
908 | * Must be called with target->scsi_host->host_lock held to protect | |
909 | * req_lim and tx_head. | |
910 | */ | |
911 | static int __srp_post_send(struct srp_target_port *target, | |
912 | struct srp_iu *iu, int len) | |
913 | { | |
914 | struct ib_sge list; | |
915 | struct ib_send_wr wr, *bad_wr; | |
916 | int ret = 0; | |
917 | ||
aef9ec39 RD |
918 | list.addr = iu->dma; |
919 | list.length = len; | |
f5358a17 | 920 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
921 | |
922 | wr.next = NULL; | |
923 | wr.wr_id = target->tx_head & SRP_SQ_SIZE; | |
924 | wr.sg_list = &list; | |
925 | wr.num_sge = 1; | |
926 | wr.opcode = IB_WR_SEND; | |
927 | wr.send_flags = IB_SEND_SIGNALED; | |
928 | ||
929 | ret = ib_post_send(target->qp, &wr, &bad_wr); | |
930 | ||
931 | if (!ret) { | |
932 | ++target->tx_head; | |
933 | --target->req_lim; | |
934 | } | |
935 | ||
936 | return ret; | |
937 | } | |
938 | ||
939 | static int srp_queuecommand(struct scsi_cmnd *scmnd, | |
940 | void (*done)(struct scsi_cmnd *)) | |
941 | { | |
942 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
943 | struct srp_request *req; | |
944 | struct srp_iu *iu; | |
945 | struct srp_cmd *cmd; | |
aef9ec39 RD |
946 | int len; |
947 | ||
948 | if (target->state == SRP_TARGET_CONNECTING) | |
949 | goto err; | |
950 | ||
951 | if (target->state == SRP_TARGET_DEAD || | |
952 | target->state == SRP_TARGET_REMOVED) { | |
953 | scmnd->result = DID_BAD_TARGET << 16; | |
954 | done(scmnd); | |
955 | return 0; | |
956 | } | |
957 | ||
958 | iu = __srp_get_tx_iu(target); | |
959 | if (!iu) | |
960 | goto err; | |
961 | ||
f5358a17 | 962 | dma_sync_single_for_cpu(target->srp_host->dev->dev->dma_device, iu->dma, |
74b0a15b | 963 | srp_max_iu_len, DMA_TO_DEVICE); |
aef9ec39 | 964 | |
d945e1df | 965 | req = list_entry(target->free_reqs.next, struct srp_request, list); |
aef9ec39 RD |
966 | |
967 | scmnd->scsi_done = done; | |
968 | scmnd->result = 0; | |
d945e1df | 969 | scmnd->host_scribble = (void *) (long) req->index; |
aef9ec39 RD |
970 | |
971 | cmd = iu->buf; | |
972 | memset(cmd, 0, sizeof *cmd); | |
973 | ||
974 | cmd->opcode = SRP_CMD; | |
975 | cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); | |
d945e1df | 976 | cmd->tag = req->index; |
aef9ec39 RD |
977 | memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); |
978 | ||
aef9ec39 RD |
979 | req->scmnd = scmnd; |
980 | req->cmd = iu; | |
981 | req->cmd_done = 0; | |
982 | req->tsk_mgmt = NULL; | |
983 | ||
984 | len = srp_map_data(scmnd, target, req); | |
985 | if (len < 0) { | |
986 | printk(KERN_ERR PFX "Failed to map data\n"); | |
987 | goto err; | |
988 | } | |
989 | ||
990 | if (__srp_post_recv(target)) { | |
991 | printk(KERN_ERR PFX "Recv failed\n"); | |
992 | goto err_unmap; | |
993 | } | |
994 | ||
f5358a17 | 995 | dma_sync_single_for_device(target->srp_host->dev->dev->dma_device, iu->dma, |
74b0a15b | 996 | srp_max_iu_len, DMA_TO_DEVICE); |
aef9ec39 RD |
997 | |
998 | if (__srp_post_send(target, iu, len)) { | |
999 | printk(KERN_ERR PFX "Send failed\n"); | |
1000 | goto err_unmap; | |
1001 | } | |
1002 | ||
d945e1df | 1003 | list_move_tail(&req->list, &target->req_queue); |
aef9ec39 RD |
1004 | |
1005 | return 0; | |
1006 | ||
1007 | err_unmap: | |
1008 | srp_unmap_data(scmnd, target, req); | |
1009 | ||
1010 | err: | |
1011 | return SCSI_MLQUEUE_HOST_BUSY; | |
1012 | } | |
1013 | ||
1014 | static int srp_alloc_iu_bufs(struct srp_target_port *target) | |
1015 | { | |
1016 | int i; | |
1017 | ||
1018 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1019 | target->rx_ring[i] = srp_alloc_iu(target->srp_host, | |
1020 | target->max_ti_iu_len, | |
1021 | GFP_KERNEL, DMA_FROM_DEVICE); | |
1022 | if (!target->rx_ring[i]) | |
1023 | goto err; | |
1024 | } | |
1025 | ||
1026 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1027 | target->tx_ring[i] = srp_alloc_iu(target->srp_host, | |
74b0a15b | 1028 | srp_max_iu_len, |
aef9ec39 RD |
1029 | GFP_KERNEL, DMA_TO_DEVICE); |
1030 | if (!target->tx_ring[i]) | |
1031 | goto err; | |
1032 | } | |
1033 | ||
1034 | return 0; | |
1035 | ||
1036 | err: | |
1037 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1038 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
1039 | target->rx_ring[i] = NULL; | |
1040 | } | |
1041 | ||
1042 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1043 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
1044 | target->tx_ring[i] = NULL; | |
1045 | } | |
1046 | ||
1047 | return -ENOMEM; | |
1048 | } | |
1049 | ||
1050 | static void srp_cm_rej_handler(struct ib_cm_id *cm_id, | |
1051 | struct ib_cm_event *event, | |
1052 | struct srp_target_port *target) | |
1053 | { | |
1054 | struct ib_class_port_info *cpi; | |
1055 | int opcode; | |
1056 | ||
1057 | switch (event->param.rej_rcvd.reason) { | |
1058 | case IB_CM_REJ_PORT_CM_REDIRECT: | |
1059 | cpi = event->param.rej_rcvd.ari; | |
1060 | target->path.dlid = cpi->redirect_lid; | |
1061 | target->path.pkey = cpi->redirect_pkey; | |
1062 | cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; | |
1063 | memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); | |
1064 | ||
1065 | target->status = target->path.dlid ? | |
1066 | SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; | |
1067 | break; | |
1068 | ||
1069 | case IB_CM_REJ_PORT_REDIRECT: | |
1070 | if (topspin_workarounds && | |
1071 | !memcmp(&target->ioc_guid, topspin_oui, 3)) { | |
1072 | /* | |
1073 | * Topspin/Cisco SRP gateways incorrectly send | |
1074 | * reject reason code 25 when they mean 24 | |
1075 | * (port redirect). | |
1076 | */ | |
1077 | memcpy(target->path.dgid.raw, | |
1078 | event->param.rej_rcvd.ari, 16); | |
1079 | ||
1080 | printk(KERN_DEBUG PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", | |
1081 | (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), | |
1082 | (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); | |
1083 | ||
1084 | target->status = SRP_PORT_REDIRECT; | |
1085 | } else { | |
1086 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); | |
1087 | target->status = -ECONNRESET; | |
1088 | } | |
1089 | break; | |
1090 | ||
1091 | case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: | |
1092 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); | |
1093 | target->status = -ECONNRESET; | |
1094 | break; | |
1095 | ||
1096 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1097 | opcode = *(u8 *) event->private_data; | |
1098 | if (opcode == SRP_LOGIN_REJ) { | |
1099 | struct srp_login_rej *rej = event->private_data; | |
1100 | u32 reason = be32_to_cpu(rej->reason); | |
1101 | ||
1102 | if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) | |
1103 | printk(KERN_WARNING PFX | |
1104 | "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); | |
1105 | else | |
1106 | printk(KERN_WARNING PFX | |
1107 | "SRP LOGIN REJECTED, reason 0x%08x\n", reason); | |
1108 | } else | |
1109 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," | |
1110 | " opcode 0x%02x\n", opcode); | |
1111 | target->status = -ECONNRESET; | |
1112 | break; | |
1113 | ||
1114 | default: | |
1115 | printk(KERN_WARNING " REJ reason 0x%x\n", | |
1116 | event->param.rej_rcvd.reason); | |
1117 | target->status = -ECONNRESET; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
1122 | { | |
1123 | struct srp_target_port *target = cm_id->context; | |
1124 | struct ib_qp_attr *qp_attr = NULL; | |
1125 | int attr_mask = 0; | |
1126 | int comp = 0; | |
1127 | int opcode = 0; | |
1128 | ||
1129 | switch (event->event) { | |
1130 | case IB_CM_REQ_ERROR: | |
1131 | printk(KERN_DEBUG PFX "Sending CM REQ failed\n"); | |
1132 | comp = 1; | |
1133 | target->status = -ECONNRESET; | |
1134 | break; | |
1135 | ||
1136 | case IB_CM_REP_RECEIVED: | |
1137 | comp = 1; | |
1138 | opcode = *(u8 *) event->private_data; | |
1139 | ||
1140 | if (opcode == SRP_LOGIN_RSP) { | |
1141 | struct srp_login_rsp *rsp = event->private_data; | |
1142 | ||
1143 | target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); | |
1144 | target->req_lim = be32_to_cpu(rsp->req_lim_delta); | |
1145 | ||
1146 | target->scsi_host->can_queue = min(target->req_lim, | |
1147 | target->scsi_host->can_queue); | |
1148 | } else { | |
1149 | printk(KERN_WARNING PFX "Unhandled RSP opcode %#x\n", opcode); | |
1150 | target->status = -ECONNRESET; | |
1151 | break; | |
1152 | } | |
1153 | ||
1154 | target->status = srp_alloc_iu_bufs(target); | |
1155 | if (target->status) | |
1156 | break; | |
1157 | ||
1158 | qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); | |
1159 | if (!qp_attr) { | |
1160 | target->status = -ENOMEM; | |
1161 | break; | |
1162 | } | |
1163 | ||
1164 | qp_attr->qp_state = IB_QPS_RTR; | |
1165 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1166 | if (target->status) | |
1167 | break; | |
1168 | ||
1169 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1170 | if (target->status) | |
1171 | break; | |
1172 | ||
1173 | target->status = srp_post_recv(target); | |
1174 | if (target->status) | |
1175 | break; | |
1176 | ||
1177 | qp_attr->qp_state = IB_QPS_RTS; | |
1178 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1179 | if (target->status) | |
1180 | break; | |
1181 | ||
1182 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1183 | if (target->status) | |
1184 | break; | |
1185 | ||
1186 | target->status = ib_send_cm_rtu(cm_id, NULL, 0); | |
1187 | if (target->status) | |
1188 | break; | |
1189 | ||
1190 | break; | |
1191 | ||
1192 | case IB_CM_REJ_RECEIVED: | |
1193 | printk(KERN_DEBUG PFX "REJ received\n"); | |
1194 | comp = 1; | |
1195 | ||
1196 | srp_cm_rej_handler(cm_id, event, target); | |
1197 | break; | |
1198 | ||
1199 | case IB_CM_MRA_RECEIVED: | |
1200 | printk(KERN_ERR PFX "MRA received\n"); | |
1201 | break; | |
1202 | ||
1203 | case IB_CM_DREP_RECEIVED: | |
1204 | break; | |
1205 | ||
1206 | case IB_CM_TIMEWAIT_EXIT: | |
1207 | printk(KERN_ERR PFX "connection closed\n"); | |
1208 | ||
1209 | comp = 1; | |
1210 | target->status = 0; | |
1211 | break; | |
1212 | ||
1213 | default: | |
1214 | printk(KERN_WARNING PFX "Unhandled CM event %d\n", event->event); | |
1215 | break; | |
1216 | } | |
1217 | ||
1218 | if (comp) | |
1219 | complete(&target->done); | |
1220 | ||
1221 | kfree(qp_attr); | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
d945e1df RD |
1226 | static int srp_send_tsk_mgmt(struct srp_target_port *target, |
1227 | struct srp_request *req, u8 func) | |
aef9ec39 | 1228 | { |
aef9ec39 RD |
1229 | struct srp_iu *iu; |
1230 | struct srp_tsk_mgmt *tsk_mgmt; | |
aef9ec39 RD |
1231 | |
1232 | spin_lock_irq(target->scsi_host->host_lock); | |
1233 | ||
1285b3a0 RD |
1234 | if (target->state == SRP_TARGET_DEAD || |
1235 | target->state == SRP_TARGET_REMOVED) { | |
d945e1df | 1236 | req->scmnd->result = DID_BAD_TARGET << 16; |
1285b3a0 RD |
1237 | goto out; |
1238 | } | |
1239 | ||
aef9ec39 RD |
1240 | init_completion(&req->done); |
1241 | ||
1242 | iu = __srp_get_tx_iu(target); | |
1243 | if (!iu) | |
1244 | goto out; | |
1245 | ||
1246 | tsk_mgmt = iu->buf; | |
1247 | memset(tsk_mgmt, 0, sizeof *tsk_mgmt); | |
1248 | ||
1249 | tsk_mgmt->opcode = SRP_TSK_MGMT; | |
d945e1df RD |
1250 | tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48); |
1251 | tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT; | |
aef9ec39 | 1252 | tsk_mgmt->tsk_mgmt_func = func; |
d945e1df | 1253 | tsk_mgmt->task_tag = req->index; |
aef9ec39 RD |
1254 | |
1255 | if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) | |
1256 | goto out; | |
1257 | ||
1258 | req->tsk_mgmt = iu; | |
1259 | ||
1260 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df | 1261 | |
aef9ec39 RD |
1262 | if (!wait_for_completion_timeout(&req->done, |
1263 | msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) | |
d945e1df | 1264 | return -1; |
aef9ec39 | 1265 | |
d945e1df | 1266 | return 0; |
aef9ec39 RD |
1267 | |
1268 | out: | |
1269 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df RD |
1270 | return -1; |
1271 | } | |
1272 | ||
1273 | static int srp_find_req(struct srp_target_port *target, | |
1274 | struct scsi_cmnd *scmnd, | |
1275 | struct srp_request **req) | |
1276 | { | |
1277 | if (scmnd->host_scribble == (void *) -1L) | |
1278 | return -1; | |
1279 | ||
1280 | *req = &target->req_ring[(long) scmnd->host_scribble]; | |
1281 | ||
1282 | return 0; | |
aef9ec39 RD |
1283 | } |
1284 | ||
1285 | static int srp_abort(struct scsi_cmnd *scmnd) | |
1286 | { | |
d945e1df RD |
1287 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1288 | struct srp_request *req; | |
1289 | int ret = SUCCESS; | |
1290 | ||
aef9ec39 RD |
1291 | printk(KERN_ERR "SRP abort called\n"); |
1292 | ||
d945e1df RD |
1293 | if (srp_find_req(target, scmnd, &req)) |
1294 | return FAILED; | |
1295 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK)) | |
1296 | return FAILED; | |
1297 | ||
1298 | spin_lock_irq(target->scsi_host->host_lock); | |
1299 | ||
1300 | if (req->cmd_done) { | |
1301 | srp_remove_req(target, req); | |
1302 | scmnd->scsi_done(scmnd); | |
1303 | } else if (!req->tsk_status) { | |
1304 | srp_remove_req(target, req); | |
1305 | scmnd->result = DID_ABORT << 16; | |
1306 | } else | |
1307 | ret = FAILED; | |
1308 | ||
1309 | spin_unlock_irq(target->scsi_host->host_lock); | |
1310 | ||
1311 | return ret; | |
aef9ec39 RD |
1312 | } |
1313 | ||
1314 | static int srp_reset_device(struct scsi_cmnd *scmnd) | |
1315 | { | |
d945e1df RD |
1316 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1317 | struct srp_request *req, *tmp; | |
1318 | ||
aef9ec39 RD |
1319 | printk(KERN_ERR "SRP reset_device called\n"); |
1320 | ||
d945e1df RD |
1321 | if (srp_find_req(target, scmnd, &req)) |
1322 | return FAILED; | |
1323 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET)) | |
1324 | return FAILED; | |
1325 | if (req->tsk_status) | |
1326 | return FAILED; | |
1327 | ||
1328 | spin_lock_irq(target->scsi_host->host_lock); | |
1329 | ||
1330 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) | |
1331 | if (req->scmnd->device == scmnd->device) { | |
1332 | req->scmnd->result = DID_RESET << 16; | |
093beac1 | 1333 | req->scmnd->scsi_done(req->scmnd); |
d945e1df RD |
1334 | srp_remove_req(target, req); |
1335 | } | |
1336 | ||
1337 | spin_unlock_irq(target->scsi_host->host_lock); | |
1338 | ||
1339 | return SUCCESS; | |
aef9ec39 RD |
1340 | } |
1341 | ||
1342 | static int srp_reset_host(struct scsi_cmnd *scmnd) | |
1343 | { | |
1344 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1345 | int ret = FAILED; | |
1346 | ||
1347 | printk(KERN_ERR PFX "SRP reset_host called\n"); | |
1348 | ||
1349 | if (!srp_reconnect_target(target)) | |
1350 | ret = SUCCESS; | |
1351 | ||
1352 | return ret; | |
1353 | } | |
1354 | ||
6ecb0c84 RD |
1355 | static ssize_t show_id_ext(struct class_device *cdev, char *buf) |
1356 | { | |
1357 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1358 | ||
1359 | if (target->state == SRP_TARGET_DEAD || | |
1360 | target->state == SRP_TARGET_REMOVED) | |
1361 | return -ENODEV; | |
1362 | ||
1363 | return sprintf(buf, "0x%016llx\n", | |
1364 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1365 | } | |
1366 | ||
1367 | static ssize_t show_ioc_guid(struct class_device *cdev, char *buf) | |
1368 | { | |
1369 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1370 | ||
1371 | if (target->state == SRP_TARGET_DEAD || | |
1372 | target->state == SRP_TARGET_REMOVED) | |
1373 | return -ENODEV; | |
1374 | ||
1375 | return sprintf(buf, "0x%016llx\n", | |
1376 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
1377 | } | |
1378 | ||
1379 | static ssize_t show_service_id(struct class_device *cdev, char *buf) | |
1380 | { | |
1381 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1382 | ||
1383 | if (target->state == SRP_TARGET_DEAD || | |
1384 | target->state == SRP_TARGET_REMOVED) | |
1385 | return -ENODEV; | |
1386 | ||
1387 | return sprintf(buf, "0x%016llx\n", | |
1388 | (unsigned long long) be64_to_cpu(target->service_id)); | |
1389 | } | |
1390 | ||
1391 | static ssize_t show_pkey(struct class_device *cdev, char *buf) | |
1392 | { | |
1393 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1394 | ||
1395 | if (target->state == SRP_TARGET_DEAD || | |
1396 | target->state == SRP_TARGET_REMOVED) | |
1397 | return -ENODEV; | |
1398 | ||
1399 | return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); | |
1400 | } | |
1401 | ||
1402 | static ssize_t show_dgid(struct class_device *cdev, char *buf) | |
1403 | { | |
1404 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1405 | ||
1406 | if (target->state == SRP_TARGET_DEAD || | |
1407 | target->state == SRP_TARGET_REMOVED) | |
1408 | return -ENODEV; | |
1409 | ||
1410 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1411 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]), | |
1412 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]), | |
1413 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]), | |
1414 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]), | |
1415 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]), | |
1416 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]), | |
1417 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]), | |
1418 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[7])); | |
1419 | } | |
1420 | ||
1421 | static CLASS_DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); | |
1422 | static CLASS_DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); | |
1423 | static CLASS_DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); | |
1424 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
1425 | static CLASS_DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); | |
1426 | ||
1427 | static struct class_device_attribute *srp_host_attrs[] = { | |
1428 | &class_device_attr_id_ext, | |
1429 | &class_device_attr_ioc_guid, | |
1430 | &class_device_attr_service_id, | |
1431 | &class_device_attr_pkey, | |
1432 | &class_device_attr_dgid, | |
1433 | NULL | |
1434 | }; | |
1435 | ||
aef9ec39 RD |
1436 | static struct scsi_host_template srp_template = { |
1437 | .module = THIS_MODULE, | |
1438 | .name = DRV_NAME, | |
1439 | .info = srp_target_info, | |
1440 | .queuecommand = srp_queuecommand, | |
1441 | .eh_abort_handler = srp_abort, | |
1442 | .eh_device_reset_handler = srp_reset_device, | |
1443 | .eh_host_reset_handler = srp_reset_host, | |
1444 | .can_queue = SRP_SQ_SIZE, | |
1445 | .this_id = -1, | |
aef9ec39 | 1446 | .cmd_per_lun = SRP_SQ_SIZE, |
6ecb0c84 RD |
1447 | .use_clustering = ENABLE_CLUSTERING, |
1448 | .shost_attrs = srp_host_attrs | |
aef9ec39 RD |
1449 | }; |
1450 | ||
1451 | static int srp_add_target(struct srp_host *host, struct srp_target_port *target) | |
1452 | { | |
1453 | sprintf(target->target_name, "SRP.T10:%016llX", | |
1454 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1455 | ||
f5358a17 | 1456 | if (scsi_add_host(target->scsi_host, host->dev->dev->dma_device)) |
aef9ec39 RD |
1457 | return -ENODEV; |
1458 | ||
b3589fd4 | 1459 | spin_lock(&host->target_lock); |
aef9ec39 | 1460 | list_add_tail(&target->list, &host->target_list); |
b3589fd4 | 1461 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1462 | |
1463 | target->state = SRP_TARGET_LIVE; | |
1464 | ||
aef9ec39 | 1465 | scsi_scan_target(&target->scsi_host->shost_gendev, |
1962a4a1 | 1466 | 0, target->scsi_id, SCAN_WILD_CARD, 0); |
aef9ec39 RD |
1467 | |
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | static void srp_release_class_dev(struct class_device *class_dev) | |
1472 | { | |
1473 | struct srp_host *host = | |
1474 | container_of(class_dev, struct srp_host, class_dev); | |
1475 | ||
1476 | complete(&host->released); | |
1477 | } | |
1478 | ||
1479 | static struct class srp_class = { | |
1480 | .name = "infiniband_srp", | |
1481 | .release = srp_release_class_dev | |
1482 | }; | |
1483 | ||
1484 | /* | |
1485 | * Target ports are added by writing | |
1486 | * | |
1487 | * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, | |
1488 | * pkey=<P_Key>,service_id=<service ID> | |
1489 | * | |
1490 | * to the add_target sysfs attribute. | |
1491 | */ | |
1492 | enum { | |
1493 | SRP_OPT_ERR = 0, | |
1494 | SRP_OPT_ID_EXT = 1 << 0, | |
1495 | SRP_OPT_IOC_GUID = 1 << 1, | |
1496 | SRP_OPT_DGID = 1 << 2, | |
1497 | SRP_OPT_PKEY = 1 << 3, | |
1498 | SRP_OPT_SERVICE_ID = 1 << 4, | |
1499 | SRP_OPT_MAX_SECT = 1 << 5, | |
52fb2b50 | 1500 | SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, |
aef9ec39 RD |
1501 | SRP_OPT_ALL = (SRP_OPT_ID_EXT | |
1502 | SRP_OPT_IOC_GUID | | |
1503 | SRP_OPT_DGID | | |
1504 | SRP_OPT_PKEY | | |
1505 | SRP_OPT_SERVICE_ID), | |
1506 | }; | |
1507 | ||
1508 | static match_table_t srp_opt_tokens = { | |
52fb2b50 VP |
1509 | { SRP_OPT_ID_EXT, "id_ext=%s" }, |
1510 | { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, | |
1511 | { SRP_OPT_DGID, "dgid=%s" }, | |
1512 | { SRP_OPT_PKEY, "pkey=%x" }, | |
1513 | { SRP_OPT_SERVICE_ID, "service_id=%s" }, | |
1514 | { SRP_OPT_MAX_SECT, "max_sect=%d" }, | |
1515 | { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, | |
1516 | { SRP_OPT_ERR, NULL } | |
aef9ec39 RD |
1517 | }; |
1518 | ||
1519 | static int srp_parse_options(const char *buf, struct srp_target_port *target) | |
1520 | { | |
1521 | char *options, *sep_opt; | |
1522 | char *p; | |
1523 | char dgid[3]; | |
1524 | substring_t args[MAX_OPT_ARGS]; | |
1525 | int opt_mask = 0; | |
1526 | int token; | |
1527 | int ret = -EINVAL; | |
1528 | int i; | |
1529 | ||
1530 | options = kstrdup(buf, GFP_KERNEL); | |
1531 | if (!options) | |
1532 | return -ENOMEM; | |
1533 | ||
1534 | sep_opt = options; | |
1535 | while ((p = strsep(&sep_opt, ",")) != NULL) { | |
1536 | if (!*p) | |
1537 | continue; | |
1538 | ||
1539 | token = match_token(p, srp_opt_tokens, args); | |
1540 | opt_mask |= token; | |
1541 | ||
1542 | switch (token) { | |
1543 | case SRP_OPT_ID_EXT: | |
1544 | p = match_strdup(args); | |
1545 | target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); | |
1546 | kfree(p); | |
1547 | break; | |
1548 | ||
1549 | case SRP_OPT_IOC_GUID: | |
1550 | p = match_strdup(args); | |
1551 | target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); | |
1552 | kfree(p); | |
1553 | break; | |
1554 | ||
1555 | case SRP_OPT_DGID: | |
1556 | p = match_strdup(args); | |
1557 | if (strlen(p) != 32) { | |
1558 | printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); | |
ce1823f0 | 1559 | kfree(p); |
aef9ec39 RD |
1560 | goto out; |
1561 | } | |
1562 | ||
1563 | for (i = 0; i < 16; ++i) { | |
1564 | strlcpy(dgid, p + i * 2, 3); | |
1565 | target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); | |
1566 | } | |
bf17c1c7 | 1567 | kfree(p); |
aef9ec39 RD |
1568 | break; |
1569 | ||
1570 | case SRP_OPT_PKEY: | |
1571 | if (match_hex(args, &token)) { | |
1572 | printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); | |
1573 | goto out; | |
1574 | } | |
1575 | target->path.pkey = cpu_to_be16(token); | |
1576 | break; | |
1577 | ||
1578 | case SRP_OPT_SERVICE_ID: | |
1579 | p = match_strdup(args); | |
1580 | target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); | |
1581 | kfree(p); | |
1582 | break; | |
1583 | ||
1584 | case SRP_OPT_MAX_SECT: | |
1585 | if (match_int(args, &token)) { | |
1586 | printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); | |
1587 | goto out; | |
1588 | } | |
1589 | target->scsi_host->max_sectors = token; | |
1590 | break; | |
1591 | ||
52fb2b50 VP |
1592 | case SRP_OPT_MAX_CMD_PER_LUN: |
1593 | if (match_int(args, &token)) { | |
1594 | printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); | |
1595 | goto out; | |
1596 | } | |
1597 | target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); | |
1598 | break; | |
1599 | ||
aef9ec39 RD |
1600 | default: |
1601 | printk(KERN_WARNING PFX "unknown parameter or missing value " | |
1602 | "'%s' in target creation request\n", p); | |
1603 | goto out; | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) | |
1608 | ret = 0; | |
1609 | else | |
1610 | for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) | |
1611 | if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && | |
1612 | !(srp_opt_tokens[i].token & opt_mask)) | |
1613 | printk(KERN_WARNING PFX "target creation request is " | |
1614 | "missing parameter '%s'\n", | |
1615 | srp_opt_tokens[i].pattern); | |
1616 | ||
1617 | out: | |
1618 | kfree(options); | |
1619 | return ret; | |
1620 | } | |
1621 | ||
1622 | static ssize_t srp_create_target(struct class_device *class_dev, | |
1623 | const char *buf, size_t count) | |
1624 | { | |
1625 | struct srp_host *host = | |
1626 | container_of(class_dev, struct srp_host, class_dev); | |
1627 | struct Scsi_Host *target_host; | |
1628 | struct srp_target_port *target; | |
1629 | int ret; | |
1630 | int i; | |
1631 | ||
1632 | target_host = scsi_host_alloc(&srp_template, | |
1633 | sizeof (struct srp_target_port)); | |
1634 | if (!target_host) | |
1635 | return -ENOMEM; | |
1636 | ||
5f068992 RD |
1637 | target_host->max_lun = SRP_MAX_LUN; |
1638 | ||
aef9ec39 RD |
1639 | target = host_to_target(target_host); |
1640 | memset(target, 0, sizeof *target); | |
1641 | ||
1642 | target->scsi_host = target_host; | |
1643 | target->srp_host = host; | |
1644 | ||
1645 | INIT_WORK(&target->work, srp_reconnect_work, target); | |
1646 | ||
d945e1df | 1647 | INIT_LIST_HEAD(&target->free_reqs); |
aef9ec39 | 1648 | INIT_LIST_HEAD(&target->req_queue); |
d945e1df RD |
1649 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
1650 | target->req_ring[i].index = i; | |
1651 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
1652 | } | |
aef9ec39 RD |
1653 | |
1654 | ret = srp_parse_options(buf, target); | |
1655 | if (ret) | |
1656 | goto err; | |
1657 | ||
f5358a17 | 1658 | ib_get_cached_gid(host->dev->dev, host->port, 0, &target->path.sgid); |
aef9ec39 RD |
1659 | |
1660 | printk(KERN_DEBUG PFX "new target: id_ext %016llx ioc_guid %016llx pkey %04x " | |
1661 | "service_id %016llx dgid %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1662 | (unsigned long long) be64_to_cpu(target->id_ext), | |
1663 | (unsigned long long) be64_to_cpu(target->ioc_guid), | |
1664 | be16_to_cpu(target->path.pkey), | |
1665 | (unsigned long long) be64_to_cpu(target->service_id), | |
1666 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[0]), | |
1667 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[2]), | |
1668 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[4]), | |
1669 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[6]), | |
1670 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[8]), | |
1671 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[10]), | |
1672 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[12]), | |
1673 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[14])); | |
1674 | ||
1675 | ret = srp_create_target_ib(target); | |
1676 | if (ret) | |
1677 | goto err; | |
1678 | ||
f5358a17 | 1679 | target->cm_id = ib_create_cm_id(host->dev->dev, srp_cm_handler, target); |
aef9ec39 RD |
1680 | if (IS_ERR(target->cm_id)) { |
1681 | ret = PTR_ERR(target->cm_id); | |
1682 | goto err_free; | |
1683 | } | |
1684 | ||
1685 | ret = srp_connect_target(target); | |
1686 | if (ret) { | |
1687 | printk(KERN_ERR PFX "Connection failed\n"); | |
1688 | goto err_cm_id; | |
1689 | } | |
1690 | ||
1691 | ret = srp_add_target(host, target); | |
1692 | if (ret) | |
1693 | goto err_disconnect; | |
1694 | ||
1695 | return count; | |
1696 | ||
1697 | err_disconnect: | |
1698 | srp_disconnect_target(target); | |
1699 | ||
1700 | err_cm_id: | |
1701 | ib_destroy_cm_id(target->cm_id); | |
1702 | ||
1703 | err_free: | |
1704 | srp_free_target_ib(target); | |
1705 | ||
1706 | err: | |
1707 | scsi_host_put(target_host); | |
1708 | ||
1709 | return ret; | |
1710 | } | |
1711 | ||
1712 | static CLASS_DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); | |
1713 | ||
1714 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) | |
1715 | { | |
1716 | struct srp_host *host = | |
1717 | container_of(class_dev, struct srp_host, class_dev); | |
1718 | ||
f5358a17 | 1719 | return sprintf(buf, "%s\n", host->dev->dev->name); |
aef9ec39 RD |
1720 | } |
1721 | ||
1722 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
1723 | ||
1724 | static ssize_t show_port(struct class_device *class_dev, char *buf) | |
1725 | { | |
1726 | struct srp_host *host = | |
1727 | container_of(class_dev, struct srp_host, class_dev); | |
1728 | ||
1729 | return sprintf(buf, "%d\n", host->port); | |
1730 | } | |
1731 | ||
1732 | static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL); | |
1733 | ||
f5358a17 | 1734 | static struct srp_host *srp_add_port(struct srp_device *device, u8 port) |
aef9ec39 RD |
1735 | { |
1736 | struct srp_host *host; | |
1737 | ||
1738 | host = kzalloc(sizeof *host, GFP_KERNEL); | |
1739 | if (!host) | |
1740 | return NULL; | |
1741 | ||
1742 | INIT_LIST_HEAD(&host->target_list); | |
b3589fd4 | 1743 | spin_lock_init(&host->target_lock); |
aef9ec39 RD |
1744 | init_completion(&host->released); |
1745 | host->dev = device; | |
1746 | host->port = port; | |
1747 | ||
1748 | host->initiator_port_id[7] = port; | |
f5358a17 | 1749 | memcpy(host->initiator_port_id + 8, &device->dev->node_guid, 8); |
aef9ec39 RD |
1750 | |
1751 | host->class_dev.class = &srp_class; | |
f5358a17 | 1752 | host->class_dev.dev = device->dev->dma_device; |
aef9ec39 | 1753 | snprintf(host->class_dev.class_id, BUS_ID_SIZE, "srp-%s-%d", |
f5358a17 | 1754 | device->dev->name, port); |
aef9ec39 RD |
1755 | |
1756 | if (class_device_register(&host->class_dev)) | |
f5358a17 | 1757 | goto free_host; |
aef9ec39 RD |
1758 | if (class_device_create_file(&host->class_dev, &class_device_attr_add_target)) |
1759 | goto err_class; | |
1760 | if (class_device_create_file(&host->class_dev, &class_device_attr_ibdev)) | |
1761 | goto err_class; | |
1762 | if (class_device_create_file(&host->class_dev, &class_device_attr_port)) | |
1763 | goto err_class; | |
1764 | ||
1765 | return host; | |
1766 | ||
1767 | err_class: | |
1768 | class_device_unregister(&host->class_dev); | |
1769 | ||
f5358a17 | 1770 | free_host: |
aef9ec39 RD |
1771 | kfree(host); |
1772 | ||
1773 | return NULL; | |
1774 | } | |
1775 | ||
1776 | static void srp_add_one(struct ib_device *device) | |
1777 | { | |
f5358a17 RD |
1778 | struct srp_device *srp_dev; |
1779 | struct ib_device_attr *dev_attr; | |
1780 | struct ib_fmr_pool_param fmr_param; | |
aef9ec39 | 1781 | struct srp_host *host; |
aef9ec39 RD |
1782 | int s, e, p; |
1783 | ||
f5358a17 RD |
1784 | dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); |
1785 | if (!dev_attr) | |
cf311cd4 | 1786 | return; |
aef9ec39 | 1787 | |
f5358a17 RD |
1788 | if (ib_query_device(device, dev_attr)) { |
1789 | printk(KERN_WARNING PFX "Query device failed for %s\n", | |
1790 | device->name); | |
1791 | goto free_attr; | |
1792 | } | |
1793 | ||
1794 | srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); | |
1795 | if (!srp_dev) | |
1796 | goto free_attr; | |
1797 | ||
1798 | /* | |
1799 | * Use the smallest page size supported by the HCA, down to a | |
1800 | * minimum of 512 bytes (which is the smallest sector that a | |
1801 | * SCSI command will ever carry). | |
1802 | */ | |
1803 | srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); | |
1804 | srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; | |
1805 | srp_dev->fmr_page_mask = ~((unsigned long) srp_dev->fmr_page_size - 1); | |
1806 | ||
1807 | INIT_LIST_HEAD(&srp_dev->dev_list); | |
1808 | ||
1809 | srp_dev->dev = device; | |
1810 | srp_dev->pd = ib_alloc_pd(device); | |
1811 | if (IS_ERR(srp_dev->pd)) | |
1812 | goto free_dev; | |
1813 | ||
1814 | srp_dev->mr = ib_get_dma_mr(srp_dev->pd, | |
1815 | IB_ACCESS_LOCAL_WRITE | | |
1816 | IB_ACCESS_REMOTE_READ | | |
1817 | IB_ACCESS_REMOTE_WRITE); | |
1818 | if (IS_ERR(srp_dev->mr)) | |
1819 | goto err_pd; | |
1820 | ||
1821 | memset(&fmr_param, 0, sizeof fmr_param); | |
1822 | fmr_param.pool_size = SRP_FMR_POOL_SIZE; | |
1823 | fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; | |
1824 | fmr_param.cache = 1; | |
1825 | fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; | |
1826 | fmr_param.page_shift = srp_dev->fmr_page_shift; | |
1827 | fmr_param.access = (IB_ACCESS_LOCAL_WRITE | | |
1828 | IB_ACCESS_REMOTE_WRITE | | |
1829 | IB_ACCESS_REMOTE_READ); | |
1830 | ||
1831 | srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); | |
1832 | if (IS_ERR(srp_dev->fmr_pool)) | |
1833 | srp_dev->fmr_pool = NULL; | |
aef9ec39 RD |
1834 | |
1835 | if (device->node_type == IB_NODE_SWITCH) { | |
1836 | s = 0; | |
1837 | e = 0; | |
1838 | } else { | |
1839 | s = 1; | |
1840 | e = device->phys_port_cnt; | |
1841 | } | |
1842 | ||
1843 | for (p = s; p <= e; ++p) { | |
f5358a17 | 1844 | host = srp_add_port(srp_dev, p); |
aef9ec39 | 1845 | if (host) |
f5358a17 | 1846 | list_add_tail(&host->list, &srp_dev->dev_list); |
aef9ec39 RD |
1847 | } |
1848 | ||
f5358a17 RD |
1849 | ib_set_client_data(device, &srp_client, srp_dev); |
1850 | ||
1851 | goto free_attr; | |
1852 | ||
1853 | err_pd: | |
1854 | ib_dealloc_pd(srp_dev->pd); | |
1855 | ||
1856 | free_dev: | |
1857 | kfree(srp_dev); | |
1858 | ||
1859 | free_attr: | |
1860 | kfree(dev_attr); | |
aef9ec39 RD |
1861 | } |
1862 | ||
1863 | static void srp_remove_one(struct ib_device *device) | |
1864 | { | |
f5358a17 | 1865 | struct srp_device *srp_dev; |
aef9ec39 RD |
1866 | struct srp_host *host, *tmp_host; |
1867 | LIST_HEAD(target_list); | |
1868 | struct srp_target_port *target, *tmp_target; | |
aef9ec39 | 1869 | |
f5358a17 | 1870 | srp_dev = ib_get_client_data(device, &srp_client); |
aef9ec39 | 1871 | |
f5358a17 | 1872 | list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { |
aef9ec39 RD |
1873 | class_device_unregister(&host->class_dev); |
1874 | /* | |
1875 | * Wait for the sysfs entry to go away, so that no new | |
1876 | * target ports can be created. | |
1877 | */ | |
1878 | wait_for_completion(&host->released); | |
1879 | ||
1880 | /* | |
1881 | * Mark all target ports as removed, so we stop queueing | |
1882 | * commands and don't try to reconnect. | |
1883 | */ | |
b3589fd4 | 1884 | spin_lock(&host->target_lock); |
549c5fc2 | 1885 | list_for_each_entry(target, &host->target_list, list) { |
0c5b3952 IR |
1886 | spin_lock_irq(target->scsi_host->host_lock); |
1887 | target->state = SRP_TARGET_REMOVED; | |
1888 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 | 1889 | } |
b3589fd4 | 1890 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1891 | |
1892 | /* | |
1893 | * Wait for any reconnection tasks that may have | |
1894 | * started before we marked our target ports as | |
1895 | * removed, and any target port removal tasks. | |
1896 | */ | |
1897 | flush_scheduled_work(); | |
1898 | ||
1899 | list_for_each_entry_safe(target, tmp_target, | |
1900 | &host->target_list, list) { | |
1901 | scsi_remove_host(target->scsi_host); | |
1902 | srp_disconnect_target(target); | |
1903 | ib_destroy_cm_id(target->cm_id); | |
1904 | srp_free_target_ib(target); | |
1905 | scsi_host_put(target->scsi_host); | |
1906 | } | |
1907 | ||
aef9ec39 RD |
1908 | kfree(host); |
1909 | } | |
1910 | ||
f5358a17 RD |
1911 | if (srp_dev->fmr_pool) |
1912 | ib_destroy_fmr_pool(srp_dev->fmr_pool); | |
1913 | ib_dereg_mr(srp_dev->mr); | |
1914 | ib_dealloc_pd(srp_dev->pd); | |
1915 | ||
1916 | kfree(srp_dev); | |
aef9ec39 RD |
1917 | } |
1918 | ||
1919 | static int __init srp_init_module(void) | |
1920 | { | |
1921 | int ret; | |
1922 | ||
74b0a15b VP |
1923 | srp_template.sg_tablesize = srp_sg_tablesize; |
1924 | srp_max_iu_len = (sizeof (struct srp_cmd) + | |
1925 | sizeof (struct srp_indirect_buf) + | |
1926 | srp_sg_tablesize * 16); | |
1927 | ||
aef9ec39 RD |
1928 | ret = class_register(&srp_class); |
1929 | if (ret) { | |
1930 | printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); | |
1931 | return ret; | |
1932 | } | |
1933 | ||
1934 | ret = ib_register_client(&srp_client); | |
1935 | if (ret) { | |
1936 | printk(KERN_ERR PFX "couldn't register IB client\n"); | |
1937 | class_unregister(&srp_class); | |
1938 | return ret; | |
1939 | } | |
1940 | ||
1941 | return 0; | |
1942 | } | |
1943 | ||
1944 | static void __exit srp_cleanup_module(void) | |
1945 | { | |
1946 | ib_unregister_client(&srp_client); | |
1947 | class_unregister(&srp_class); | |
1948 | } | |
1949 | ||
1950 | module_init(srp_init_module); | |
1951 | module_exit(srp_cleanup_module); |