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 | ||
559ce8f1 IR |
78 | static int mellanox_workarounds = 1; |
79 | ||
80 | module_param(mellanox_workarounds, int, 0444); | |
81 | MODULE_PARM_DESC(mellanox_workarounds, | |
82 | "Enable workarounds for Mellanox SRP target bugs if != 0"); | |
83 | ||
aef9ec39 RD |
84 | static void srp_add_one(struct ib_device *device); |
85 | static void srp_remove_one(struct ib_device *device); | |
86 | static void srp_completion(struct ib_cq *cq, void *target_ptr); | |
87 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event); | |
88 | ||
89 | static struct ib_client srp_client = { | |
90 | .name = "srp", | |
91 | .add = srp_add_one, | |
92 | .remove = srp_remove_one | |
93 | }; | |
94 | ||
c1a0b23b MT |
95 | static struct ib_sa_client srp_sa_client; |
96 | ||
aef9ec39 RD |
97 | static inline struct srp_target_port *host_to_target(struct Scsi_Host *host) |
98 | { | |
99 | return (struct srp_target_port *) host->hostdata; | |
100 | } | |
101 | ||
102 | static const char *srp_target_info(struct Scsi_Host *host) | |
103 | { | |
104 | return host_to_target(host)->target_name; | |
105 | } | |
106 | ||
5d7cbfd6 RD |
107 | static int srp_target_is_topspin(struct srp_target_port *target) |
108 | { | |
109 | static const u8 topspin_oui[3] = { 0x00, 0x05, 0xad }; | |
110 | ||
111 | return topspin_workarounds && | |
112 | !memcmp(&target->ioc_guid, topspin_oui, sizeof topspin_oui); | |
113 | } | |
114 | ||
115 | static int srp_target_is_mellanox(struct srp_target_port *target) | |
116 | { | |
117 | static const u8 mellanox_oui[3] = { 0x00, 0x02, 0xc9 }; | |
118 | ||
119 | return mellanox_workarounds && | |
120 | !memcmp(&target->ioc_guid, mellanox_oui, sizeof mellanox_oui); | |
121 | } | |
122 | ||
aef9ec39 RD |
123 | static struct srp_iu *srp_alloc_iu(struct srp_host *host, size_t size, |
124 | gfp_t gfp_mask, | |
125 | enum dma_data_direction direction) | |
126 | { | |
127 | struct srp_iu *iu; | |
128 | ||
129 | iu = kmalloc(sizeof *iu, gfp_mask); | |
130 | if (!iu) | |
131 | goto out; | |
132 | ||
133 | iu->buf = kzalloc(size, gfp_mask); | |
134 | if (!iu->buf) | |
135 | goto out_free_iu; | |
136 | ||
85507bcc RC |
137 | iu->dma = ib_dma_map_single(host->dev->dev, iu->buf, size, direction); |
138 | if (ib_dma_mapping_error(host->dev->dev, iu->dma)) | |
aef9ec39 RD |
139 | goto out_free_buf; |
140 | ||
141 | iu->size = size; | |
142 | iu->direction = direction; | |
143 | ||
144 | return iu; | |
145 | ||
146 | out_free_buf: | |
147 | kfree(iu->buf); | |
148 | out_free_iu: | |
149 | kfree(iu); | |
150 | out: | |
151 | return NULL; | |
152 | } | |
153 | ||
154 | static void srp_free_iu(struct srp_host *host, struct srp_iu *iu) | |
155 | { | |
156 | if (!iu) | |
157 | return; | |
158 | ||
85507bcc | 159 | ib_dma_unmap_single(host->dev->dev, iu->dma, iu->size, iu->direction); |
aef9ec39 RD |
160 | kfree(iu->buf); |
161 | kfree(iu); | |
162 | } | |
163 | ||
164 | static void srp_qp_event(struct ib_event *event, void *context) | |
165 | { | |
166 | printk(KERN_ERR PFX "QP event %d\n", event->event); | |
167 | } | |
168 | ||
169 | static int srp_init_qp(struct srp_target_port *target, | |
170 | struct ib_qp *qp) | |
171 | { | |
172 | struct ib_qp_attr *attr; | |
173 | int ret; | |
174 | ||
175 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
176 | if (!attr) | |
177 | return -ENOMEM; | |
178 | ||
f5358a17 | 179 | ret = ib_find_cached_pkey(target->srp_host->dev->dev, |
aef9ec39 RD |
180 | target->srp_host->port, |
181 | be16_to_cpu(target->path.pkey), | |
182 | &attr->pkey_index); | |
183 | if (ret) | |
184 | goto out; | |
185 | ||
186 | attr->qp_state = IB_QPS_INIT; | |
187 | attr->qp_access_flags = (IB_ACCESS_REMOTE_READ | | |
188 | IB_ACCESS_REMOTE_WRITE); | |
189 | attr->port_num = target->srp_host->port; | |
190 | ||
191 | ret = ib_modify_qp(qp, attr, | |
192 | IB_QP_STATE | | |
193 | IB_QP_PKEY_INDEX | | |
194 | IB_QP_ACCESS_FLAGS | | |
195 | IB_QP_PORT); | |
196 | ||
197 | out: | |
198 | kfree(attr); | |
199 | return ret; | |
200 | } | |
201 | ||
202 | static int srp_create_target_ib(struct srp_target_port *target) | |
203 | { | |
204 | struct ib_qp_init_attr *init_attr; | |
205 | int ret; | |
206 | ||
207 | init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); | |
208 | if (!init_attr) | |
209 | return -ENOMEM; | |
210 | ||
f5358a17 | 211 | target->cq = ib_create_cq(target->srp_host->dev->dev, srp_completion, |
f4fd0b22 | 212 | NULL, target, SRP_CQ_SIZE, 0); |
aef9ec39 RD |
213 | if (IS_ERR(target->cq)) { |
214 | ret = PTR_ERR(target->cq); | |
215 | goto out; | |
216 | } | |
217 | ||
218 | ib_req_notify_cq(target->cq, IB_CQ_NEXT_COMP); | |
219 | ||
220 | init_attr->event_handler = srp_qp_event; | |
221 | init_attr->cap.max_send_wr = SRP_SQ_SIZE; | |
222 | init_attr->cap.max_recv_wr = SRP_RQ_SIZE; | |
223 | init_attr->cap.max_recv_sge = 1; | |
224 | init_attr->cap.max_send_sge = 1; | |
225 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
226 | init_attr->qp_type = IB_QPT_RC; | |
227 | init_attr->send_cq = target->cq; | |
228 | init_attr->recv_cq = target->cq; | |
229 | ||
f5358a17 | 230 | target->qp = ib_create_qp(target->srp_host->dev->pd, init_attr); |
aef9ec39 RD |
231 | if (IS_ERR(target->qp)) { |
232 | ret = PTR_ERR(target->qp); | |
233 | ib_destroy_cq(target->cq); | |
234 | goto out; | |
235 | } | |
236 | ||
237 | ret = srp_init_qp(target, target->qp); | |
238 | if (ret) { | |
239 | ib_destroy_qp(target->qp); | |
240 | ib_destroy_cq(target->cq); | |
241 | goto out; | |
242 | } | |
243 | ||
244 | out: | |
245 | kfree(init_attr); | |
246 | return ret; | |
247 | } | |
248 | ||
249 | static void srp_free_target_ib(struct srp_target_port *target) | |
250 | { | |
251 | int i; | |
252 | ||
253 | ib_destroy_qp(target->qp); | |
254 | ib_destroy_cq(target->cq); | |
255 | ||
256 | for (i = 0; i < SRP_RQ_SIZE; ++i) | |
257 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
258 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) | |
259 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
260 | } | |
261 | ||
262 | static void srp_path_rec_completion(int status, | |
263 | struct ib_sa_path_rec *pathrec, | |
264 | void *target_ptr) | |
265 | { | |
266 | struct srp_target_port *target = target_ptr; | |
267 | ||
268 | target->status = status; | |
269 | if (status) | |
270 | printk(KERN_ERR PFX "Got failed path rec status %d\n", status); | |
271 | else | |
272 | target->path = *pathrec; | |
273 | complete(&target->done); | |
274 | } | |
275 | ||
276 | static int srp_lookup_path(struct srp_target_port *target) | |
277 | { | |
278 | target->path.numb_path = 1; | |
279 | ||
280 | init_completion(&target->done); | |
281 | ||
c1a0b23b MT |
282 | target->path_query_id = ib_sa_path_rec_get(&srp_sa_client, |
283 | target->srp_host->dev->dev, | |
aef9ec39 RD |
284 | target->srp_host->port, |
285 | &target->path, | |
286 | IB_SA_PATH_REC_DGID | | |
287 | IB_SA_PATH_REC_SGID | | |
288 | IB_SA_PATH_REC_NUMB_PATH | | |
289 | IB_SA_PATH_REC_PKEY, | |
290 | SRP_PATH_REC_TIMEOUT_MS, | |
291 | GFP_KERNEL, | |
292 | srp_path_rec_completion, | |
293 | target, &target->path_query); | |
294 | if (target->path_query_id < 0) | |
295 | return target->path_query_id; | |
296 | ||
297 | wait_for_completion(&target->done); | |
298 | ||
299 | if (target->status < 0) | |
300 | printk(KERN_WARNING PFX "Path record query failed\n"); | |
301 | ||
302 | return target->status; | |
303 | } | |
304 | ||
305 | static int srp_send_req(struct srp_target_port *target) | |
306 | { | |
307 | struct { | |
308 | struct ib_cm_req_param param; | |
309 | struct srp_login_req priv; | |
310 | } *req = NULL; | |
311 | int status; | |
312 | ||
313 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
314 | if (!req) | |
315 | return -ENOMEM; | |
316 | ||
317 | req->param.primary_path = &target->path; | |
318 | req->param.alternate_path = NULL; | |
319 | req->param.service_id = target->service_id; | |
320 | req->param.qp_num = target->qp->qp_num; | |
321 | req->param.qp_type = target->qp->qp_type; | |
322 | req->param.private_data = &req->priv; | |
323 | req->param.private_data_len = sizeof req->priv; | |
324 | req->param.flow_control = 1; | |
325 | ||
326 | get_random_bytes(&req->param.starting_psn, 4); | |
327 | req->param.starting_psn &= 0xffffff; | |
328 | ||
329 | /* | |
330 | * Pick some arbitrary defaults here; we could make these | |
331 | * module parameters if anyone cared about setting them. | |
332 | */ | |
333 | req->param.responder_resources = 4; | |
334 | req->param.remote_cm_response_timeout = 20; | |
335 | req->param.local_cm_response_timeout = 20; | |
336 | req->param.retry_count = 7; | |
337 | req->param.rnr_retry_count = 7; | |
338 | req->param.max_cm_retries = 15; | |
339 | ||
340 | req->priv.opcode = SRP_LOGIN_REQ; | |
341 | req->priv.tag = 0; | |
74b0a15b | 342 | req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); |
aef9ec39 RD |
343 | req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | |
344 | SRP_BUF_FORMAT_INDIRECT); | |
0c0450db | 345 | /* |
3cd96564 | 346 | * In the published SRP specification (draft rev. 16a), the |
0c0450db R |
347 | * port identifier format is 8 bytes of ID extension followed |
348 | * by 8 bytes of GUID. Older drafts put the two halves in the | |
349 | * opposite order, so that the GUID comes first. | |
350 | * | |
351 | * Targets conforming to these obsolete drafts can be | |
352 | * recognized by the I/O Class they report. | |
353 | */ | |
354 | if (target->io_class == SRP_REV10_IB_IO_CLASS) { | |
355 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb | 356 | &target->path.sgid.global.interface_id, 8); |
0c0450db | 357 | memcpy(req->priv.initiator_port_id + 8, |
01cb9bcb | 358 | &target->initiator_ext, 8); |
0c0450db R |
359 | memcpy(req->priv.target_port_id, &target->ioc_guid, 8); |
360 | memcpy(req->priv.target_port_id + 8, &target->id_ext, 8); | |
361 | } else { | |
362 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb IR |
363 | &target->initiator_ext, 8); |
364 | memcpy(req->priv.initiator_port_id + 8, | |
365 | &target->path.sgid.global.interface_id, 8); | |
0c0450db R |
366 | memcpy(req->priv.target_port_id, &target->id_ext, 8); |
367 | memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); | |
368 | } | |
369 | ||
aef9ec39 RD |
370 | /* |
371 | * Topspin/Cisco SRP targets will reject our login unless we | |
01cb9bcb IR |
372 | * zero out the first 8 bytes of our initiator port ID and set |
373 | * the second 8 bytes to the local node GUID. | |
aef9ec39 | 374 | */ |
5d7cbfd6 | 375 | if (srp_target_is_topspin(target)) { |
aef9ec39 RD |
376 | printk(KERN_DEBUG PFX "Topspin/Cisco initiator port ID workaround " |
377 | "activated for target GUID %016llx\n", | |
378 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
379 | memset(req->priv.initiator_port_id, 0, 8); | |
01cb9bcb IR |
380 | memcpy(req->priv.initiator_port_id + 8, |
381 | &target->srp_host->dev->dev->node_guid, 8); | |
aef9ec39 | 382 | } |
aef9ec39 RD |
383 | |
384 | status = ib_send_cm_req(target->cm_id, &req->param); | |
385 | ||
386 | kfree(req); | |
387 | ||
388 | return status; | |
389 | } | |
390 | ||
391 | static void srp_disconnect_target(struct srp_target_port *target) | |
392 | { | |
393 | /* XXX should send SRP_I_LOGOUT request */ | |
394 | ||
395 | init_completion(&target->done); | |
e6581056 RD |
396 | if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { |
397 | printk(KERN_DEBUG PFX "Sending CM DREQ failed\n"); | |
398 | return; | |
399 | } | |
aef9ec39 RD |
400 | wait_for_completion(&target->done); |
401 | } | |
402 | ||
c4028958 | 403 | static void srp_remove_work(struct work_struct *work) |
aef9ec39 | 404 | { |
c4028958 DH |
405 | struct srp_target_port *target = |
406 | container_of(work, struct srp_target_port, work); | |
aef9ec39 RD |
407 | |
408 | spin_lock_irq(target->scsi_host->host_lock); | |
409 | if (target->state != SRP_TARGET_DEAD) { | |
410 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 RD |
411 | return; |
412 | } | |
413 | target->state = SRP_TARGET_REMOVED; | |
414 | spin_unlock_irq(target->scsi_host->host_lock); | |
415 | ||
b3589fd4 | 416 | spin_lock(&target->srp_host->target_lock); |
aef9ec39 | 417 | list_del(&target->list); |
b3589fd4 | 418 | spin_unlock(&target->srp_host->target_lock); |
aef9ec39 RD |
419 | |
420 | scsi_remove_host(target->scsi_host); | |
421 | ib_destroy_cm_id(target->cm_id); | |
422 | srp_free_target_ib(target); | |
423 | scsi_host_put(target->scsi_host); | |
aef9ec39 RD |
424 | } |
425 | ||
426 | static int srp_connect_target(struct srp_target_port *target) | |
427 | { | |
428 | int ret; | |
429 | ||
430 | ret = srp_lookup_path(target); | |
431 | if (ret) | |
432 | return ret; | |
433 | ||
434 | while (1) { | |
435 | init_completion(&target->done); | |
436 | ret = srp_send_req(target); | |
437 | if (ret) | |
438 | return ret; | |
439 | wait_for_completion(&target->done); | |
440 | ||
441 | /* | |
442 | * The CM event handling code will set status to | |
443 | * SRP_PORT_REDIRECT if we get a port redirect REJ | |
444 | * back, or SRP_DLID_REDIRECT if we get a lid/qp | |
445 | * redirect REJ back. | |
446 | */ | |
447 | switch (target->status) { | |
448 | case 0: | |
449 | return 0; | |
450 | ||
451 | case SRP_PORT_REDIRECT: | |
452 | ret = srp_lookup_path(target); | |
453 | if (ret) | |
454 | return ret; | |
455 | break; | |
456 | ||
457 | case SRP_DLID_REDIRECT: | |
458 | break; | |
459 | ||
460 | default: | |
461 | return target->status; | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
d945e1df RD |
466 | static void srp_unmap_data(struct scsi_cmnd *scmnd, |
467 | struct srp_target_port *target, | |
468 | struct srp_request *req) | |
469 | { | |
bb350d1d | 470 | if (!scsi_sglist(scmnd) || |
d945e1df RD |
471 | (scmnd->sc_data_direction != DMA_TO_DEVICE && |
472 | scmnd->sc_data_direction != DMA_FROM_DEVICE)) | |
473 | return; | |
474 | ||
f5358a17 RD |
475 | if (req->fmr) { |
476 | ib_fmr_pool_unmap(req->fmr); | |
477 | req->fmr = NULL; | |
478 | } | |
479 | ||
bb350d1d FT |
480 | ib_dma_unmap_sg(target->srp_host->dev->dev, scsi_sglist(scmnd), |
481 | scsi_sg_count(scmnd), scmnd->sc_data_direction); | |
d945e1df RD |
482 | } |
483 | ||
526b4caa IR |
484 | static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) |
485 | { | |
486 | srp_unmap_data(req->scmnd, target, req); | |
487 | list_move_tail(&req->list, &target->free_reqs); | |
488 | } | |
489 | ||
490 | static void srp_reset_req(struct srp_target_port *target, struct srp_request *req) | |
491 | { | |
492 | req->scmnd->result = DID_RESET << 16; | |
493 | req->scmnd->scsi_done(req->scmnd); | |
494 | srp_remove_req(target, req); | |
495 | } | |
496 | ||
aef9ec39 RD |
497 | static int srp_reconnect_target(struct srp_target_port *target) |
498 | { | |
499 | struct ib_cm_id *new_cm_id; | |
500 | struct ib_qp_attr qp_attr; | |
526b4caa | 501 | struct srp_request *req, *tmp; |
aef9ec39 RD |
502 | struct ib_wc wc; |
503 | int ret; | |
aef9ec39 RD |
504 | |
505 | spin_lock_irq(target->scsi_host->host_lock); | |
506 | if (target->state != SRP_TARGET_LIVE) { | |
507 | spin_unlock_irq(target->scsi_host->host_lock); | |
508 | return -EAGAIN; | |
509 | } | |
510 | target->state = SRP_TARGET_CONNECTING; | |
511 | spin_unlock_irq(target->scsi_host->host_lock); | |
512 | ||
513 | srp_disconnect_target(target); | |
514 | /* | |
515 | * Now get a new local CM ID so that we avoid confusing the | |
516 | * target in case things are really fouled up. | |
517 | */ | |
f5358a17 | 518 | new_cm_id = ib_create_cm_id(target->srp_host->dev->dev, |
aef9ec39 RD |
519 | srp_cm_handler, target); |
520 | if (IS_ERR(new_cm_id)) { | |
521 | ret = PTR_ERR(new_cm_id); | |
522 | goto err; | |
523 | } | |
524 | ib_destroy_cm_id(target->cm_id); | |
525 | target->cm_id = new_cm_id; | |
526 | ||
527 | qp_attr.qp_state = IB_QPS_RESET; | |
528 | ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); | |
529 | if (ret) | |
530 | goto err; | |
531 | ||
532 | ret = srp_init_qp(target, target->qp); | |
533 | if (ret) | |
534 | goto err; | |
535 | ||
536 | while (ib_poll_cq(target->cq, 1, &wc) > 0) | |
537 | ; /* nothing */ | |
538 | ||
d916a8f1 | 539 | spin_lock_irq(target->scsi_host->host_lock); |
526b4caa IR |
540 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) |
541 | srp_reset_req(target, req); | |
d916a8f1 | 542 | spin_unlock_irq(target->scsi_host->host_lock); |
aef9ec39 RD |
543 | |
544 | target->rx_head = 0; | |
545 | target->tx_head = 0; | |
546 | target->tx_tail = 0; | |
aef9ec39 | 547 | |
1033ff67 | 548 | target->qp_in_error = 0; |
aef9ec39 RD |
549 | ret = srp_connect_target(target); |
550 | if (ret) | |
551 | goto err; | |
552 | ||
553 | spin_lock_irq(target->scsi_host->host_lock); | |
554 | if (target->state == SRP_TARGET_CONNECTING) { | |
555 | ret = 0; | |
556 | target->state = SRP_TARGET_LIVE; | |
557 | } else | |
558 | ret = -EAGAIN; | |
559 | spin_unlock_irq(target->scsi_host->host_lock); | |
560 | ||
561 | return ret; | |
562 | ||
563 | err: | |
564 | printk(KERN_ERR PFX "reconnect failed (%d), removing target port.\n", ret); | |
565 | ||
566 | /* | |
567 | * We couldn't reconnect, so kill our target port off. | |
568 | * However, we have to defer the real removal because we might | |
569 | * be in the context of the SCSI error handler now, which | |
570 | * would deadlock if we call scsi_remove_host(). | |
571 | */ | |
572 | spin_lock_irq(target->scsi_host->host_lock); | |
573 | if (target->state == SRP_TARGET_CONNECTING) { | |
574 | target->state = SRP_TARGET_DEAD; | |
c4028958 | 575 | INIT_WORK(&target->work, srp_remove_work); |
aef9ec39 RD |
576 | schedule_work(&target->work); |
577 | } | |
578 | spin_unlock_irq(target->scsi_host->host_lock); | |
579 | ||
580 | return ret; | |
581 | } | |
582 | ||
559ce8f1 | 583 | static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat, |
f5358a17 RD |
584 | int sg_cnt, struct srp_request *req, |
585 | struct srp_direct_buf *buf) | |
586 | { | |
587 | u64 io_addr = 0; | |
588 | u64 *dma_pages; | |
589 | u32 len; | |
590 | int page_cnt; | |
591 | int i, j; | |
592 | int ret; | |
559ce8f1 | 593 | struct srp_device *dev = target->srp_host->dev; |
85507bcc | 594 | struct ib_device *ibdev = dev->dev; |
bb350d1d | 595 | struct scatterlist *sg; |
f5358a17 RD |
596 | |
597 | if (!dev->fmr_pool) | |
598 | return -ENODEV; | |
599 | ||
5d7cbfd6 RD |
600 | if (srp_target_is_mellanox(target) && |
601 | (ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask)) | |
559ce8f1 IR |
602 | return -EINVAL; |
603 | ||
f5358a17 | 604 | len = page_cnt = 0; |
bb350d1d FT |
605 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
606 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 607 | |
bb350d1d | 608 | if (ib_sg_dma_address(ibdev, sg) & ~dev->fmr_page_mask) { |
f5358a17 RD |
609 | if (i > 0) |
610 | return -EINVAL; | |
611 | else | |
612 | ++page_cnt; | |
613 | } | |
bb350d1d | 614 | if ((ib_sg_dma_address(ibdev, sg) + dma_len) & |
f5358a17 RD |
615 | ~dev->fmr_page_mask) { |
616 | if (i < sg_cnt - 1) | |
617 | return -EINVAL; | |
618 | else | |
619 | ++page_cnt; | |
620 | } | |
621 | ||
85507bcc | 622 | len += dma_len; |
f5358a17 RD |
623 | } |
624 | ||
625 | page_cnt += len >> dev->fmr_page_shift; | |
626 | if (page_cnt > SRP_FMR_SIZE) | |
627 | return -ENOMEM; | |
628 | ||
629 | dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); | |
630 | if (!dma_pages) | |
631 | return -ENOMEM; | |
632 | ||
633 | page_cnt = 0; | |
bb350d1d FT |
634 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
635 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc RC |
636 | |
637 | for (j = 0; j < dma_len; j += dev->fmr_page_size) | |
f5358a17 | 638 | dma_pages[page_cnt++] = |
bb350d1d | 639 | (ib_sg_dma_address(ibdev, sg) & |
85507bcc RC |
640 | dev->fmr_page_mask) + j; |
641 | } | |
f5358a17 RD |
642 | |
643 | req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, | |
adfaa888 | 644 | dma_pages, page_cnt, io_addr); |
f5358a17 RD |
645 | if (IS_ERR(req->fmr)) { |
646 | ret = PTR_ERR(req->fmr); | |
6583eb3d | 647 | req->fmr = NULL; |
f5358a17 RD |
648 | goto out; |
649 | } | |
650 | ||
85507bcc RC |
651 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) & |
652 | ~dev->fmr_page_mask); | |
f5358a17 RD |
653 | buf->key = cpu_to_be32(req->fmr->fmr->rkey); |
654 | buf->len = cpu_to_be32(len); | |
655 | ||
656 | ret = 0; | |
657 | ||
658 | out: | |
659 | kfree(dma_pages); | |
660 | ||
661 | return ret; | |
662 | } | |
663 | ||
aef9ec39 RD |
664 | static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, |
665 | struct srp_request *req) | |
666 | { | |
cf368713 | 667 | struct scatterlist *scat; |
aef9ec39 | 668 | struct srp_cmd *cmd = req->cmd->buf; |
cf368713 | 669 | int len, nents, count; |
f5358a17 | 670 | u8 fmt = SRP_DATA_DESC_DIRECT; |
85507bcc RC |
671 | struct srp_device *dev; |
672 | struct ib_device *ibdev; | |
aef9ec39 | 673 | |
bb350d1d | 674 | if (!scsi_sglist(scmnd) || scmnd->sc_data_direction == DMA_NONE) |
aef9ec39 RD |
675 | return sizeof (struct srp_cmd); |
676 | ||
677 | if (scmnd->sc_data_direction != DMA_FROM_DEVICE && | |
678 | scmnd->sc_data_direction != DMA_TO_DEVICE) { | |
679 | printk(KERN_WARNING PFX "Unhandled data direction %d\n", | |
680 | scmnd->sc_data_direction); | |
681 | return -EINVAL; | |
682 | } | |
683 | ||
bb350d1d FT |
684 | nents = scsi_sg_count(scmnd); |
685 | scat = scsi_sglist(scmnd); | |
aef9ec39 | 686 | |
85507bcc RC |
687 | dev = target->srp_host->dev; |
688 | ibdev = dev->dev; | |
689 | ||
690 | count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction); | |
f5358a17 RD |
691 | |
692 | fmt = SRP_DATA_DESC_DIRECT; | |
693 | len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); | |
aef9ec39 | 694 | |
cf368713 | 695 | if (count == 1) { |
f5358a17 RD |
696 | /* |
697 | * The midlayer only generated a single gather/scatter | |
698 | * entry, or DMA mapping coalesced everything to a | |
699 | * single entry. So a direct descriptor along with | |
700 | * the DMA MR suffices. | |
701 | */ | |
cf368713 | 702 | struct srp_direct_buf *buf = (void *) cmd->add_data; |
aef9ec39 | 703 | |
85507bcc RC |
704 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat)); |
705 | buf->key = cpu_to_be32(dev->mr->rkey); | |
706 | buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat)); | |
559ce8f1 | 707 | } else if (srp_map_fmr(target, scat, count, req, |
f5358a17 RD |
708 | (void *) cmd->add_data)) { |
709 | /* | |
710 | * FMR mapping failed, and the scatterlist has more | |
711 | * than one entry. Generate an indirect memory | |
712 | * descriptor. | |
713 | */ | |
cf368713 | 714 | struct srp_indirect_buf *buf = (void *) cmd->add_data; |
bb350d1d | 715 | struct scatterlist *sg; |
cf368713 | 716 | u32 datalen = 0; |
f5358a17 | 717 | int i; |
aef9ec39 | 718 | |
cf368713 | 719 | fmt = SRP_DATA_DESC_INDIRECT; |
f5358a17 RD |
720 | len = sizeof (struct srp_cmd) + |
721 | sizeof (struct srp_indirect_buf) + | |
722 | count * sizeof (struct srp_direct_buf); | |
723 | ||
bb350d1d FT |
724 | scsi_for_each_sg(scmnd, sg, count, i) { |
725 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 726 | |
f5358a17 | 727 | buf->desc_list[i].va = |
bb350d1d | 728 | cpu_to_be64(ib_sg_dma_address(ibdev, sg)); |
f5358a17 | 729 | buf->desc_list[i].key = |
85507bcc RC |
730 | cpu_to_be32(dev->mr->rkey); |
731 | buf->desc_list[i].len = cpu_to_be32(dma_len); | |
732 | datalen += dma_len; | |
f5358a17 | 733 | } |
aef9ec39 | 734 | |
cf368713 RD |
735 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) |
736 | cmd->data_out_desc_cnt = count; | |
737 | else | |
738 | cmd->data_in_desc_cnt = count; | |
739 | ||
f5358a17 RD |
740 | buf->table_desc.va = |
741 | cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); | |
cf368713 | 742 | buf->table_desc.key = |
f5358a17 | 743 | cpu_to_be32(target->srp_host->dev->mr->rkey); |
cf368713 RD |
744 | buf->table_desc.len = |
745 | cpu_to_be32(count * sizeof (struct srp_direct_buf)); | |
746 | ||
cf368713 | 747 | buf->len = cpu_to_be32(datalen); |
aef9ec39 RD |
748 | } |
749 | ||
750 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) | |
751 | cmd->buf_fmt = fmt << 4; | |
752 | else | |
753 | cmd->buf_fmt = fmt; | |
754 | ||
aef9ec39 RD |
755 | return len; |
756 | } | |
757 | ||
aef9ec39 RD |
758 | static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) |
759 | { | |
760 | struct srp_request *req; | |
761 | struct scsi_cmnd *scmnd; | |
762 | unsigned long flags; | |
763 | s32 delta; | |
764 | ||
765 | delta = (s32) be32_to_cpu(rsp->req_lim_delta); | |
766 | ||
767 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
768 | ||
769 | target->req_lim += delta; | |
770 | ||
771 | req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT]; | |
772 | ||
773 | if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { | |
774 | if (be32_to_cpu(rsp->resp_data_len) < 4) | |
775 | req->tsk_status = -1; | |
776 | else | |
777 | req->tsk_status = rsp->data[3]; | |
778 | complete(&req->done); | |
779 | } else { | |
d945e1df | 780 | scmnd = req->scmnd; |
aef9ec39 RD |
781 | if (!scmnd) |
782 | printk(KERN_ERR "Null scmnd for RSP w/tag %016llx\n", | |
783 | (unsigned long long) rsp->tag); | |
784 | scmnd->result = rsp->status; | |
785 | ||
786 | if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { | |
787 | memcpy(scmnd->sense_buffer, rsp->data + | |
788 | be32_to_cpu(rsp->resp_data_len), | |
789 | min_t(int, be32_to_cpu(rsp->sense_data_len), | |
790 | SCSI_SENSE_BUFFERSIZE)); | |
791 | } | |
792 | ||
793 | if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) | |
bb350d1d | 794 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt)); |
aef9ec39 | 795 | else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) |
bb350d1d | 796 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt)); |
aef9ec39 | 797 | |
aef9ec39 | 798 | if (!req->tsk_mgmt) { |
aef9ec39 RD |
799 | scmnd->host_scribble = (void *) -1L; |
800 | scmnd->scsi_done(scmnd); | |
801 | ||
d945e1df | 802 | srp_remove_req(target, req); |
aef9ec39 RD |
803 | } else |
804 | req->cmd_done = 1; | |
805 | } | |
806 | ||
807 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
808 | } | |
809 | ||
aef9ec39 RD |
810 | static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) |
811 | { | |
85507bcc | 812 | struct ib_device *dev; |
aef9ec39 RD |
813 | struct srp_iu *iu; |
814 | u8 opcode; | |
815 | ||
816 | iu = target->rx_ring[wc->wr_id & ~SRP_OP_RECV]; | |
817 | ||
85507bcc RC |
818 | dev = target->srp_host->dev->dev; |
819 | ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len, | |
820 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
821 | |
822 | opcode = *(u8 *) iu->buf; | |
823 | ||
824 | if (0) { | |
825 | int i; | |
826 | ||
827 | printk(KERN_ERR PFX "recv completion, opcode 0x%02x\n", opcode); | |
828 | ||
829 | for (i = 0; i < wc->byte_len; ++i) { | |
830 | if (i % 8 == 0) | |
831 | printk(KERN_ERR " [%02x] ", i); | |
832 | printk(" %02x", ((u8 *) iu->buf)[i]); | |
833 | if ((i + 1) % 8 == 0) | |
834 | printk("\n"); | |
835 | } | |
836 | ||
837 | if (wc->byte_len % 8) | |
838 | printk("\n"); | |
839 | } | |
840 | ||
841 | switch (opcode) { | |
842 | case SRP_RSP: | |
843 | srp_process_rsp(target, iu->buf); | |
844 | break; | |
845 | ||
846 | case SRP_T_LOGOUT: | |
847 | /* XXX Handle target logout */ | |
848 | printk(KERN_WARNING PFX "Got target logout request\n"); | |
849 | break; | |
850 | ||
851 | default: | |
852 | printk(KERN_WARNING PFX "Unhandled SRP opcode 0x%02x\n", opcode); | |
853 | break; | |
854 | } | |
855 | ||
85507bcc RC |
856 | ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len, |
857 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
858 | } |
859 | ||
860 | static void srp_completion(struct ib_cq *cq, void *target_ptr) | |
861 | { | |
862 | struct srp_target_port *target = target_ptr; | |
863 | struct ib_wc wc; | |
aef9ec39 RD |
864 | |
865 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
866 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
867 | if (wc.status) { | |
868 | printk(KERN_ERR PFX "failed %s status %d\n", | |
869 | wc.wr_id & SRP_OP_RECV ? "receive" : "send", | |
870 | wc.status); | |
1033ff67 | 871 | target->qp_in_error = 1; |
aef9ec39 RD |
872 | break; |
873 | } | |
874 | ||
875 | if (wc.wr_id & SRP_OP_RECV) | |
876 | srp_handle_recv(target, &wc); | |
877 | else | |
878 | ++target->tx_tail; | |
879 | } | |
880 | } | |
881 | ||
882 | static int __srp_post_recv(struct srp_target_port *target) | |
883 | { | |
884 | struct srp_iu *iu; | |
885 | struct ib_sge list; | |
886 | struct ib_recv_wr wr, *bad_wr; | |
887 | unsigned int next; | |
888 | int ret; | |
889 | ||
890 | next = target->rx_head & (SRP_RQ_SIZE - 1); | |
891 | wr.wr_id = next | SRP_OP_RECV; | |
892 | iu = target->rx_ring[next]; | |
893 | ||
894 | list.addr = iu->dma; | |
895 | list.length = iu->size; | |
f5358a17 | 896 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
897 | |
898 | wr.next = NULL; | |
899 | wr.sg_list = &list; | |
900 | wr.num_sge = 1; | |
901 | ||
902 | ret = ib_post_recv(target->qp, &wr, &bad_wr); | |
903 | if (!ret) | |
904 | ++target->rx_head; | |
905 | ||
906 | return ret; | |
907 | } | |
908 | ||
909 | static int srp_post_recv(struct srp_target_port *target) | |
910 | { | |
911 | unsigned long flags; | |
912 | int ret; | |
913 | ||
914 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
915 | ret = __srp_post_recv(target); | |
916 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
917 | ||
918 | return ret; | |
919 | } | |
920 | ||
921 | /* | |
922 | * Must be called with target->scsi_host->host_lock held to protect | |
47f2bce9 RD |
923 | * req_lim and tx_head. Lock cannot be dropped between call here and |
924 | * call to __srp_post_send(). | |
aef9ec39 RD |
925 | */ |
926 | static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target) | |
927 | { | |
928 | if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) | |
929 | return NULL; | |
930 | ||
6bfa24fa RD |
931 | if (unlikely(target->req_lim < 1)) |
932 | ++target->zero_req_lim; | |
47f2bce9 | 933 | |
aef9ec39 RD |
934 | return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; |
935 | } | |
936 | ||
937 | /* | |
938 | * Must be called with target->scsi_host->host_lock held to protect | |
939 | * req_lim and tx_head. | |
940 | */ | |
941 | static int __srp_post_send(struct srp_target_port *target, | |
942 | struct srp_iu *iu, int len) | |
943 | { | |
944 | struct ib_sge list; | |
945 | struct ib_send_wr wr, *bad_wr; | |
946 | int ret = 0; | |
947 | ||
aef9ec39 RD |
948 | list.addr = iu->dma; |
949 | list.length = len; | |
f5358a17 | 950 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
951 | |
952 | wr.next = NULL; | |
953 | wr.wr_id = target->tx_head & SRP_SQ_SIZE; | |
954 | wr.sg_list = &list; | |
955 | wr.num_sge = 1; | |
956 | wr.opcode = IB_WR_SEND; | |
957 | wr.send_flags = IB_SEND_SIGNALED; | |
958 | ||
959 | ret = ib_post_send(target->qp, &wr, &bad_wr); | |
960 | ||
961 | if (!ret) { | |
962 | ++target->tx_head; | |
963 | --target->req_lim; | |
964 | } | |
965 | ||
966 | return ret; | |
967 | } | |
968 | ||
969 | static int srp_queuecommand(struct scsi_cmnd *scmnd, | |
970 | void (*done)(struct scsi_cmnd *)) | |
971 | { | |
972 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
973 | struct srp_request *req; | |
974 | struct srp_iu *iu; | |
975 | struct srp_cmd *cmd; | |
85507bcc | 976 | struct ib_device *dev; |
aef9ec39 RD |
977 | int len; |
978 | ||
979 | if (target->state == SRP_TARGET_CONNECTING) | |
980 | goto err; | |
981 | ||
982 | if (target->state == SRP_TARGET_DEAD || | |
983 | target->state == SRP_TARGET_REMOVED) { | |
984 | scmnd->result = DID_BAD_TARGET << 16; | |
985 | done(scmnd); | |
986 | return 0; | |
987 | } | |
988 | ||
989 | iu = __srp_get_tx_iu(target); | |
990 | if (!iu) | |
991 | goto err; | |
992 | ||
85507bcc RC |
993 | dev = target->srp_host->dev->dev; |
994 | ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len, | |
995 | DMA_TO_DEVICE); | |
aef9ec39 | 996 | |
d945e1df | 997 | req = list_entry(target->free_reqs.next, struct srp_request, list); |
aef9ec39 RD |
998 | |
999 | scmnd->scsi_done = done; | |
1000 | scmnd->result = 0; | |
d945e1df | 1001 | scmnd->host_scribble = (void *) (long) req->index; |
aef9ec39 RD |
1002 | |
1003 | cmd = iu->buf; | |
1004 | memset(cmd, 0, sizeof *cmd); | |
1005 | ||
1006 | cmd->opcode = SRP_CMD; | |
1007 | cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); | |
d945e1df | 1008 | cmd->tag = req->index; |
aef9ec39 RD |
1009 | memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); |
1010 | ||
aef9ec39 RD |
1011 | req->scmnd = scmnd; |
1012 | req->cmd = iu; | |
1013 | req->cmd_done = 0; | |
1014 | req->tsk_mgmt = NULL; | |
1015 | ||
1016 | len = srp_map_data(scmnd, target, req); | |
1017 | if (len < 0) { | |
1018 | printk(KERN_ERR PFX "Failed to map data\n"); | |
1019 | goto err; | |
1020 | } | |
1021 | ||
1022 | if (__srp_post_recv(target)) { | |
1023 | printk(KERN_ERR PFX "Recv failed\n"); | |
1024 | goto err_unmap; | |
1025 | } | |
1026 | ||
85507bcc RC |
1027 | ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len, |
1028 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1029 | |
1030 | if (__srp_post_send(target, iu, len)) { | |
1031 | printk(KERN_ERR PFX "Send failed\n"); | |
1032 | goto err_unmap; | |
1033 | } | |
1034 | ||
d945e1df | 1035 | list_move_tail(&req->list, &target->req_queue); |
aef9ec39 RD |
1036 | |
1037 | return 0; | |
1038 | ||
1039 | err_unmap: | |
1040 | srp_unmap_data(scmnd, target, req); | |
1041 | ||
1042 | err: | |
1043 | return SCSI_MLQUEUE_HOST_BUSY; | |
1044 | } | |
1045 | ||
1046 | static int srp_alloc_iu_bufs(struct srp_target_port *target) | |
1047 | { | |
1048 | int i; | |
1049 | ||
1050 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1051 | target->rx_ring[i] = srp_alloc_iu(target->srp_host, | |
1052 | target->max_ti_iu_len, | |
1053 | GFP_KERNEL, DMA_FROM_DEVICE); | |
1054 | if (!target->rx_ring[i]) | |
1055 | goto err; | |
1056 | } | |
1057 | ||
1058 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1059 | target->tx_ring[i] = srp_alloc_iu(target->srp_host, | |
74b0a15b | 1060 | srp_max_iu_len, |
aef9ec39 RD |
1061 | GFP_KERNEL, DMA_TO_DEVICE); |
1062 | if (!target->tx_ring[i]) | |
1063 | goto err; | |
1064 | } | |
1065 | ||
1066 | return 0; | |
1067 | ||
1068 | err: | |
1069 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1070 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
1071 | target->rx_ring[i] = NULL; | |
1072 | } | |
1073 | ||
1074 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1075 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
1076 | target->tx_ring[i] = NULL; | |
1077 | } | |
1078 | ||
1079 | return -ENOMEM; | |
1080 | } | |
1081 | ||
1082 | static void srp_cm_rej_handler(struct ib_cm_id *cm_id, | |
1083 | struct ib_cm_event *event, | |
1084 | struct srp_target_port *target) | |
1085 | { | |
1086 | struct ib_class_port_info *cpi; | |
1087 | int opcode; | |
1088 | ||
1089 | switch (event->param.rej_rcvd.reason) { | |
1090 | case IB_CM_REJ_PORT_CM_REDIRECT: | |
1091 | cpi = event->param.rej_rcvd.ari; | |
1092 | target->path.dlid = cpi->redirect_lid; | |
1093 | target->path.pkey = cpi->redirect_pkey; | |
1094 | cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; | |
1095 | memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); | |
1096 | ||
1097 | target->status = target->path.dlid ? | |
1098 | SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; | |
1099 | break; | |
1100 | ||
1101 | case IB_CM_REJ_PORT_REDIRECT: | |
5d7cbfd6 | 1102 | if (srp_target_is_topspin(target)) { |
aef9ec39 RD |
1103 | /* |
1104 | * Topspin/Cisco SRP gateways incorrectly send | |
1105 | * reject reason code 25 when they mean 24 | |
1106 | * (port redirect). | |
1107 | */ | |
1108 | memcpy(target->path.dgid.raw, | |
1109 | event->param.rej_rcvd.ari, 16); | |
1110 | ||
1111 | printk(KERN_DEBUG PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", | |
1112 | (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), | |
1113 | (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); | |
1114 | ||
1115 | target->status = SRP_PORT_REDIRECT; | |
1116 | } else { | |
1117 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); | |
1118 | target->status = -ECONNRESET; | |
1119 | } | |
1120 | break; | |
1121 | ||
1122 | case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: | |
1123 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); | |
1124 | target->status = -ECONNRESET; | |
1125 | break; | |
1126 | ||
1127 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1128 | opcode = *(u8 *) event->private_data; | |
1129 | if (opcode == SRP_LOGIN_REJ) { | |
1130 | struct srp_login_rej *rej = event->private_data; | |
1131 | u32 reason = be32_to_cpu(rej->reason); | |
1132 | ||
1133 | if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) | |
1134 | printk(KERN_WARNING PFX | |
1135 | "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); | |
1136 | else | |
1137 | printk(KERN_WARNING PFX | |
1138 | "SRP LOGIN REJECTED, reason 0x%08x\n", reason); | |
1139 | } else | |
1140 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," | |
1141 | " opcode 0x%02x\n", opcode); | |
1142 | target->status = -ECONNRESET; | |
1143 | break; | |
1144 | ||
1145 | default: | |
1146 | printk(KERN_WARNING " REJ reason 0x%x\n", | |
1147 | event->param.rej_rcvd.reason); | |
1148 | target->status = -ECONNRESET; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
1153 | { | |
1154 | struct srp_target_port *target = cm_id->context; | |
1155 | struct ib_qp_attr *qp_attr = NULL; | |
1156 | int attr_mask = 0; | |
1157 | int comp = 0; | |
1158 | int opcode = 0; | |
1159 | ||
1160 | switch (event->event) { | |
1161 | case IB_CM_REQ_ERROR: | |
1162 | printk(KERN_DEBUG PFX "Sending CM REQ failed\n"); | |
1163 | comp = 1; | |
1164 | target->status = -ECONNRESET; | |
1165 | break; | |
1166 | ||
1167 | case IB_CM_REP_RECEIVED: | |
1168 | comp = 1; | |
1169 | opcode = *(u8 *) event->private_data; | |
1170 | ||
1171 | if (opcode == SRP_LOGIN_RSP) { | |
1172 | struct srp_login_rsp *rsp = event->private_data; | |
1173 | ||
1174 | target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); | |
1175 | target->req_lim = be32_to_cpu(rsp->req_lim_delta); | |
1176 | ||
1177 | target->scsi_host->can_queue = min(target->req_lim, | |
1178 | target->scsi_host->can_queue); | |
1179 | } else { | |
1180 | printk(KERN_WARNING PFX "Unhandled RSP opcode %#x\n", opcode); | |
1181 | target->status = -ECONNRESET; | |
1182 | break; | |
1183 | } | |
1184 | ||
d2fcea7d VP |
1185 | if (!target->rx_ring[0]) { |
1186 | target->status = srp_alloc_iu_bufs(target); | |
1187 | if (target->status) | |
1188 | break; | |
1189 | } | |
aef9ec39 RD |
1190 | |
1191 | qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); | |
1192 | if (!qp_attr) { | |
1193 | target->status = -ENOMEM; | |
1194 | break; | |
1195 | } | |
1196 | ||
1197 | qp_attr->qp_state = IB_QPS_RTR; | |
1198 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1199 | if (target->status) | |
1200 | break; | |
1201 | ||
1202 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1203 | if (target->status) | |
1204 | break; | |
1205 | ||
1206 | target->status = srp_post_recv(target); | |
1207 | if (target->status) | |
1208 | break; | |
1209 | ||
1210 | qp_attr->qp_state = IB_QPS_RTS; | |
1211 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1212 | if (target->status) | |
1213 | break; | |
1214 | ||
1215 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1216 | if (target->status) | |
1217 | break; | |
1218 | ||
1219 | target->status = ib_send_cm_rtu(cm_id, NULL, 0); | |
1220 | if (target->status) | |
1221 | break; | |
1222 | ||
1223 | break; | |
1224 | ||
1225 | case IB_CM_REJ_RECEIVED: | |
1226 | printk(KERN_DEBUG PFX "REJ received\n"); | |
1227 | comp = 1; | |
1228 | ||
1229 | srp_cm_rej_handler(cm_id, event, target); | |
1230 | break; | |
1231 | ||
b7ac4ab4 IR |
1232 | case IB_CM_DREQ_RECEIVED: |
1233 | printk(KERN_WARNING PFX "DREQ received - connection closed\n"); | |
1234 | if (ib_send_cm_drep(cm_id, NULL, 0)) | |
1235 | printk(KERN_ERR PFX "Sending CM DREP failed\n"); | |
aef9ec39 RD |
1236 | break; |
1237 | ||
1238 | case IB_CM_TIMEWAIT_EXIT: | |
1239 | printk(KERN_ERR PFX "connection closed\n"); | |
1240 | ||
1241 | comp = 1; | |
1242 | target->status = 0; | |
1243 | break; | |
1244 | ||
b7ac4ab4 IR |
1245 | case IB_CM_MRA_RECEIVED: |
1246 | case IB_CM_DREQ_ERROR: | |
1247 | case IB_CM_DREP_RECEIVED: | |
1248 | break; | |
1249 | ||
aef9ec39 RD |
1250 | default: |
1251 | printk(KERN_WARNING PFX "Unhandled CM event %d\n", event->event); | |
1252 | break; | |
1253 | } | |
1254 | ||
1255 | if (comp) | |
1256 | complete(&target->done); | |
1257 | ||
1258 | kfree(qp_attr); | |
1259 | ||
1260 | return 0; | |
1261 | } | |
1262 | ||
d945e1df RD |
1263 | static int srp_send_tsk_mgmt(struct srp_target_port *target, |
1264 | struct srp_request *req, u8 func) | |
aef9ec39 | 1265 | { |
aef9ec39 RD |
1266 | struct srp_iu *iu; |
1267 | struct srp_tsk_mgmt *tsk_mgmt; | |
aef9ec39 RD |
1268 | |
1269 | spin_lock_irq(target->scsi_host->host_lock); | |
1270 | ||
1285b3a0 RD |
1271 | if (target->state == SRP_TARGET_DEAD || |
1272 | target->state == SRP_TARGET_REMOVED) { | |
d945e1df | 1273 | req->scmnd->result = DID_BAD_TARGET << 16; |
1285b3a0 RD |
1274 | goto out; |
1275 | } | |
1276 | ||
aef9ec39 RD |
1277 | init_completion(&req->done); |
1278 | ||
1279 | iu = __srp_get_tx_iu(target); | |
1280 | if (!iu) | |
1281 | goto out; | |
1282 | ||
1283 | tsk_mgmt = iu->buf; | |
1284 | memset(tsk_mgmt, 0, sizeof *tsk_mgmt); | |
1285 | ||
1286 | tsk_mgmt->opcode = SRP_TSK_MGMT; | |
d945e1df RD |
1287 | tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48); |
1288 | tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT; | |
aef9ec39 | 1289 | tsk_mgmt->tsk_mgmt_func = func; |
d945e1df | 1290 | tsk_mgmt->task_tag = req->index; |
aef9ec39 RD |
1291 | |
1292 | if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) | |
1293 | goto out; | |
1294 | ||
1295 | req->tsk_mgmt = iu; | |
1296 | ||
1297 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df | 1298 | |
aef9ec39 RD |
1299 | if (!wait_for_completion_timeout(&req->done, |
1300 | msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) | |
d945e1df | 1301 | return -1; |
aef9ec39 | 1302 | |
d945e1df | 1303 | return 0; |
aef9ec39 RD |
1304 | |
1305 | out: | |
1306 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df RD |
1307 | return -1; |
1308 | } | |
1309 | ||
1310 | static int srp_find_req(struct srp_target_port *target, | |
1311 | struct scsi_cmnd *scmnd, | |
1312 | struct srp_request **req) | |
1313 | { | |
1314 | if (scmnd->host_scribble == (void *) -1L) | |
1315 | return -1; | |
1316 | ||
1317 | *req = &target->req_ring[(long) scmnd->host_scribble]; | |
1318 | ||
1319 | return 0; | |
aef9ec39 RD |
1320 | } |
1321 | ||
1322 | static int srp_abort(struct scsi_cmnd *scmnd) | |
1323 | { | |
d945e1df RD |
1324 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1325 | struct srp_request *req; | |
1326 | int ret = SUCCESS; | |
1327 | ||
aef9ec39 RD |
1328 | printk(KERN_ERR "SRP abort called\n"); |
1329 | ||
1033ff67 IR |
1330 | if (target->qp_in_error) |
1331 | return FAILED; | |
d945e1df RD |
1332 | if (srp_find_req(target, scmnd, &req)) |
1333 | return FAILED; | |
1334 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK)) | |
1335 | return FAILED; | |
1336 | ||
1337 | spin_lock_irq(target->scsi_host->host_lock); | |
1338 | ||
1339 | if (req->cmd_done) { | |
1340 | srp_remove_req(target, req); | |
1341 | scmnd->scsi_done(scmnd); | |
1342 | } else if (!req->tsk_status) { | |
1343 | srp_remove_req(target, req); | |
1344 | scmnd->result = DID_ABORT << 16; | |
1345 | } else | |
1346 | ret = FAILED; | |
1347 | ||
1348 | spin_unlock_irq(target->scsi_host->host_lock); | |
1349 | ||
1350 | return ret; | |
aef9ec39 RD |
1351 | } |
1352 | ||
1353 | static int srp_reset_device(struct scsi_cmnd *scmnd) | |
1354 | { | |
d945e1df RD |
1355 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1356 | struct srp_request *req, *tmp; | |
1357 | ||
aef9ec39 RD |
1358 | printk(KERN_ERR "SRP reset_device called\n"); |
1359 | ||
1033ff67 IR |
1360 | if (target->qp_in_error) |
1361 | return FAILED; | |
d945e1df RD |
1362 | if (srp_find_req(target, scmnd, &req)) |
1363 | return FAILED; | |
1364 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET)) | |
1365 | return FAILED; | |
1366 | if (req->tsk_status) | |
1367 | return FAILED; | |
1368 | ||
1369 | spin_lock_irq(target->scsi_host->host_lock); | |
1370 | ||
1371 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) | |
526b4caa IR |
1372 | if (req->scmnd->device == scmnd->device) |
1373 | srp_reset_req(target, req); | |
d945e1df RD |
1374 | |
1375 | spin_unlock_irq(target->scsi_host->host_lock); | |
1376 | ||
1377 | return SUCCESS; | |
aef9ec39 RD |
1378 | } |
1379 | ||
1380 | static int srp_reset_host(struct scsi_cmnd *scmnd) | |
1381 | { | |
1382 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1383 | int ret = FAILED; | |
1384 | ||
1385 | printk(KERN_ERR PFX "SRP reset_host called\n"); | |
1386 | ||
1387 | if (!srp_reconnect_target(target)) | |
1388 | ret = SUCCESS; | |
1389 | ||
1390 | return ret; | |
1391 | } | |
1392 | ||
6ecb0c84 RD |
1393 | static ssize_t show_id_ext(struct class_device *cdev, char *buf) |
1394 | { | |
1395 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1396 | ||
1397 | if (target->state == SRP_TARGET_DEAD || | |
1398 | target->state == SRP_TARGET_REMOVED) | |
1399 | return -ENODEV; | |
1400 | ||
1401 | return sprintf(buf, "0x%016llx\n", | |
1402 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1403 | } | |
1404 | ||
1405 | static ssize_t show_ioc_guid(struct class_device *cdev, char *buf) | |
1406 | { | |
1407 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1408 | ||
1409 | if (target->state == SRP_TARGET_DEAD || | |
1410 | target->state == SRP_TARGET_REMOVED) | |
1411 | return -ENODEV; | |
1412 | ||
1413 | return sprintf(buf, "0x%016llx\n", | |
1414 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
1415 | } | |
1416 | ||
1417 | static ssize_t show_service_id(struct class_device *cdev, char *buf) | |
1418 | { | |
1419 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1420 | ||
1421 | if (target->state == SRP_TARGET_DEAD || | |
1422 | target->state == SRP_TARGET_REMOVED) | |
1423 | return -ENODEV; | |
1424 | ||
1425 | return sprintf(buf, "0x%016llx\n", | |
1426 | (unsigned long long) be64_to_cpu(target->service_id)); | |
1427 | } | |
1428 | ||
1429 | static ssize_t show_pkey(struct class_device *cdev, char *buf) | |
1430 | { | |
1431 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1432 | ||
1433 | if (target->state == SRP_TARGET_DEAD || | |
1434 | target->state == SRP_TARGET_REMOVED) | |
1435 | return -ENODEV; | |
1436 | ||
1437 | return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); | |
1438 | } | |
1439 | ||
1440 | static ssize_t show_dgid(struct class_device *cdev, char *buf) | |
1441 | { | |
1442 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1443 | ||
1444 | if (target->state == SRP_TARGET_DEAD || | |
1445 | target->state == SRP_TARGET_REMOVED) | |
1446 | return -ENODEV; | |
1447 | ||
1448 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1449 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]), | |
1450 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]), | |
1451 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]), | |
1452 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]), | |
1453 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]), | |
1454 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]), | |
1455 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]), | |
1456 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[7])); | |
1457 | } | |
1458 | ||
3633b3d0 IR |
1459 | static ssize_t show_orig_dgid(struct class_device *cdev, char *buf) |
1460 | { | |
1461 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1462 | ||
1463 | if (target->state == SRP_TARGET_DEAD || | |
1464 | target->state == SRP_TARGET_REMOVED) | |
1465 | return -ENODEV; | |
1466 | ||
1467 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1468 | be16_to_cpu(target->orig_dgid[0]), | |
1469 | be16_to_cpu(target->orig_dgid[1]), | |
1470 | be16_to_cpu(target->orig_dgid[2]), | |
1471 | be16_to_cpu(target->orig_dgid[3]), | |
1472 | be16_to_cpu(target->orig_dgid[4]), | |
1473 | be16_to_cpu(target->orig_dgid[5]), | |
1474 | be16_to_cpu(target->orig_dgid[6]), | |
1475 | be16_to_cpu(target->orig_dgid[7])); | |
1476 | } | |
1477 | ||
6bfa24fa RD |
1478 | static ssize_t show_zero_req_lim(struct class_device *cdev, char *buf) |
1479 | { | |
1480 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1481 | ||
1482 | if (target->state == SRP_TARGET_DEAD || | |
1483 | target->state == SRP_TARGET_REMOVED) | |
1484 | return -ENODEV; | |
1485 | ||
1486 | return sprintf(buf, "%d\n", target->zero_req_lim); | |
1487 | } | |
1488 | ||
ded7f1a1 IR |
1489 | static ssize_t show_local_ib_port(struct class_device *cdev, char *buf) |
1490 | { | |
1491 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1492 | ||
1493 | return sprintf(buf, "%d\n", target->srp_host->port); | |
1494 | } | |
1495 | ||
1496 | static ssize_t show_local_ib_device(struct class_device *cdev, char *buf) | |
1497 | { | |
1498 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1499 | ||
1500 | return sprintf(buf, "%s\n", target->srp_host->dev->dev->name); | |
1501 | } | |
1502 | ||
1503 | static CLASS_DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); | |
1504 | static CLASS_DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); | |
1505 | static CLASS_DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); | |
1506 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
1507 | static CLASS_DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); | |
3633b3d0 | 1508 | static CLASS_DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL); |
ded7f1a1 IR |
1509 | static CLASS_DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); |
1510 | static CLASS_DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL); | |
1511 | static CLASS_DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL); | |
6ecb0c84 RD |
1512 | |
1513 | static struct class_device_attribute *srp_host_attrs[] = { | |
1514 | &class_device_attr_id_ext, | |
1515 | &class_device_attr_ioc_guid, | |
1516 | &class_device_attr_service_id, | |
1517 | &class_device_attr_pkey, | |
1518 | &class_device_attr_dgid, | |
3633b3d0 | 1519 | &class_device_attr_orig_dgid, |
6bfa24fa | 1520 | &class_device_attr_zero_req_lim, |
ded7f1a1 IR |
1521 | &class_device_attr_local_ib_port, |
1522 | &class_device_attr_local_ib_device, | |
6ecb0c84 RD |
1523 | NULL |
1524 | }; | |
1525 | ||
aef9ec39 RD |
1526 | static struct scsi_host_template srp_template = { |
1527 | .module = THIS_MODULE, | |
b7f008fd RD |
1528 | .name = "InfiniBand SRP initiator", |
1529 | .proc_name = DRV_NAME, | |
aef9ec39 RD |
1530 | .info = srp_target_info, |
1531 | .queuecommand = srp_queuecommand, | |
1532 | .eh_abort_handler = srp_abort, | |
1533 | .eh_device_reset_handler = srp_reset_device, | |
1534 | .eh_host_reset_handler = srp_reset_host, | |
1535 | .can_queue = SRP_SQ_SIZE, | |
1536 | .this_id = -1, | |
aef9ec39 | 1537 | .cmd_per_lun = SRP_SQ_SIZE, |
6ecb0c84 RD |
1538 | .use_clustering = ENABLE_CLUSTERING, |
1539 | .shost_attrs = srp_host_attrs | |
aef9ec39 RD |
1540 | }; |
1541 | ||
1542 | static int srp_add_target(struct srp_host *host, struct srp_target_port *target) | |
1543 | { | |
1544 | sprintf(target->target_name, "SRP.T10:%016llX", | |
1545 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1546 | ||
f5358a17 | 1547 | if (scsi_add_host(target->scsi_host, host->dev->dev->dma_device)) |
aef9ec39 RD |
1548 | return -ENODEV; |
1549 | ||
b3589fd4 | 1550 | spin_lock(&host->target_lock); |
aef9ec39 | 1551 | list_add_tail(&target->list, &host->target_list); |
b3589fd4 | 1552 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1553 | |
1554 | target->state = SRP_TARGET_LIVE; | |
1555 | ||
aef9ec39 | 1556 | scsi_scan_target(&target->scsi_host->shost_gendev, |
1962a4a1 | 1557 | 0, target->scsi_id, SCAN_WILD_CARD, 0); |
aef9ec39 RD |
1558 | |
1559 | return 0; | |
1560 | } | |
1561 | ||
1562 | static void srp_release_class_dev(struct class_device *class_dev) | |
1563 | { | |
1564 | struct srp_host *host = | |
1565 | container_of(class_dev, struct srp_host, class_dev); | |
1566 | ||
1567 | complete(&host->released); | |
1568 | } | |
1569 | ||
1570 | static struct class srp_class = { | |
1571 | .name = "infiniband_srp", | |
1572 | .release = srp_release_class_dev | |
1573 | }; | |
1574 | ||
1575 | /* | |
1576 | * Target ports are added by writing | |
1577 | * | |
1578 | * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, | |
1579 | * pkey=<P_Key>,service_id=<service ID> | |
1580 | * | |
1581 | * to the add_target sysfs attribute. | |
1582 | */ | |
1583 | enum { | |
1584 | SRP_OPT_ERR = 0, | |
1585 | SRP_OPT_ID_EXT = 1 << 0, | |
1586 | SRP_OPT_IOC_GUID = 1 << 1, | |
1587 | SRP_OPT_DGID = 1 << 2, | |
1588 | SRP_OPT_PKEY = 1 << 3, | |
1589 | SRP_OPT_SERVICE_ID = 1 << 4, | |
1590 | SRP_OPT_MAX_SECT = 1 << 5, | |
52fb2b50 | 1591 | SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, |
0c0450db | 1592 | SRP_OPT_IO_CLASS = 1 << 7, |
01cb9bcb | 1593 | SRP_OPT_INITIATOR_EXT = 1 << 8, |
aef9ec39 RD |
1594 | SRP_OPT_ALL = (SRP_OPT_ID_EXT | |
1595 | SRP_OPT_IOC_GUID | | |
1596 | SRP_OPT_DGID | | |
1597 | SRP_OPT_PKEY | | |
1598 | SRP_OPT_SERVICE_ID), | |
1599 | }; | |
1600 | ||
1601 | static match_table_t srp_opt_tokens = { | |
52fb2b50 VP |
1602 | { SRP_OPT_ID_EXT, "id_ext=%s" }, |
1603 | { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, | |
1604 | { SRP_OPT_DGID, "dgid=%s" }, | |
1605 | { SRP_OPT_PKEY, "pkey=%x" }, | |
1606 | { SRP_OPT_SERVICE_ID, "service_id=%s" }, | |
1607 | { SRP_OPT_MAX_SECT, "max_sect=%d" }, | |
1608 | { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, | |
0c0450db | 1609 | { SRP_OPT_IO_CLASS, "io_class=%x" }, |
01cb9bcb | 1610 | { SRP_OPT_INITIATOR_EXT, "initiator_ext=%s" }, |
52fb2b50 | 1611 | { SRP_OPT_ERR, NULL } |
aef9ec39 RD |
1612 | }; |
1613 | ||
1614 | static int srp_parse_options(const char *buf, struct srp_target_port *target) | |
1615 | { | |
1616 | char *options, *sep_opt; | |
1617 | char *p; | |
1618 | char dgid[3]; | |
1619 | substring_t args[MAX_OPT_ARGS]; | |
1620 | int opt_mask = 0; | |
1621 | int token; | |
1622 | int ret = -EINVAL; | |
1623 | int i; | |
1624 | ||
1625 | options = kstrdup(buf, GFP_KERNEL); | |
1626 | if (!options) | |
1627 | return -ENOMEM; | |
1628 | ||
1629 | sep_opt = options; | |
1630 | while ((p = strsep(&sep_opt, ",")) != NULL) { | |
1631 | if (!*p) | |
1632 | continue; | |
1633 | ||
1634 | token = match_token(p, srp_opt_tokens, args); | |
1635 | opt_mask |= token; | |
1636 | ||
1637 | switch (token) { | |
1638 | case SRP_OPT_ID_EXT: | |
1639 | p = match_strdup(args); | |
a20f3a6d IR |
1640 | if (!p) { |
1641 | ret = -ENOMEM; | |
1642 | goto out; | |
1643 | } | |
aef9ec39 RD |
1644 | target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1645 | kfree(p); | |
1646 | break; | |
1647 | ||
1648 | case SRP_OPT_IOC_GUID: | |
1649 | p = match_strdup(args); | |
a20f3a6d IR |
1650 | if (!p) { |
1651 | ret = -ENOMEM; | |
1652 | goto out; | |
1653 | } | |
aef9ec39 RD |
1654 | target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1655 | kfree(p); | |
1656 | break; | |
1657 | ||
1658 | case SRP_OPT_DGID: | |
1659 | p = match_strdup(args); | |
a20f3a6d IR |
1660 | if (!p) { |
1661 | ret = -ENOMEM; | |
1662 | goto out; | |
1663 | } | |
aef9ec39 RD |
1664 | if (strlen(p) != 32) { |
1665 | printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); | |
ce1823f0 | 1666 | kfree(p); |
aef9ec39 RD |
1667 | goto out; |
1668 | } | |
1669 | ||
1670 | for (i = 0; i < 16; ++i) { | |
1671 | strlcpy(dgid, p + i * 2, 3); | |
1672 | target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); | |
1673 | } | |
bf17c1c7 | 1674 | kfree(p); |
3633b3d0 | 1675 | memcpy(target->orig_dgid, target->path.dgid.raw, 16); |
aef9ec39 RD |
1676 | break; |
1677 | ||
1678 | case SRP_OPT_PKEY: | |
1679 | if (match_hex(args, &token)) { | |
1680 | printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); | |
1681 | goto out; | |
1682 | } | |
1683 | target->path.pkey = cpu_to_be16(token); | |
1684 | break; | |
1685 | ||
1686 | case SRP_OPT_SERVICE_ID: | |
1687 | p = match_strdup(args); | |
a20f3a6d IR |
1688 | if (!p) { |
1689 | ret = -ENOMEM; | |
1690 | goto out; | |
1691 | } | |
aef9ec39 RD |
1692 | target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1693 | kfree(p); | |
1694 | break; | |
1695 | ||
1696 | case SRP_OPT_MAX_SECT: | |
1697 | if (match_int(args, &token)) { | |
1698 | printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); | |
1699 | goto out; | |
1700 | } | |
1701 | target->scsi_host->max_sectors = token; | |
1702 | break; | |
1703 | ||
52fb2b50 VP |
1704 | case SRP_OPT_MAX_CMD_PER_LUN: |
1705 | if (match_int(args, &token)) { | |
1706 | printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); | |
1707 | goto out; | |
1708 | } | |
1709 | target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); | |
1710 | break; | |
1711 | ||
0c0450db R |
1712 | case SRP_OPT_IO_CLASS: |
1713 | if (match_hex(args, &token)) { | |
1714 | printk(KERN_WARNING PFX "bad IO class parameter '%s' \n", p); | |
1715 | goto out; | |
1716 | } | |
1717 | if (token != SRP_REV10_IB_IO_CLASS && | |
1718 | token != SRP_REV16A_IB_IO_CLASS) { | |
1719 | printk(KERN_WARNING PFX "unknown IO class parameter value" | |
1720 | " %x specified (use %x or %x).\n", | |
1721 | token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); | |
1722 | goto out; | |
1723 | } | |
1724 | target->io_class = token; | |
1725 | break; | |
1726 | ||
01cb9bcb IR |
1727 | case SRP_OPT_INITIATOR_EXT: |
1728 | p = match_strdup(args); | |
a20f3a6d IR |
1729 | if (!p) { |
1730 | ret = -ENOMEM; | |
1731 | goto out; | |
1732 | } | |
01cb9bcb IR |
1733 | target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1734 | kfree(p); | |
1735 | break; | |
1736 | ||
aef9ec39 RD |
1737 | default: |
1738 | printk(KERN_WARNING PFX "unknown parameter or missing value " | |
1739 | "'%s' in target creation request\n", p); | |
1740 | goto out; | |
1741 | } | |
1742 | } | |
1743 | ||
1744 | if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) | |
1745 | ret = 0; | |
1746 | else | |
1747 | for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) | |
1748 | if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && | |
1749 | !(srp_opt_tokens[i].token & opt_mask)) | |
1750 | printk(KERN_WARNING PFX "target creation request is " | |
1751 | "missing parameter '%s'\n", | |
1752 | srp_opt_tokens[i].pattern); | |
1753 | ||
1754 | out: | |
1755 | kfree(options); | |
1756 | return ret; | |
1757 | } | |
1758 | ||
1759 | static ssize_t srp_create_target(struct class_device *class_dev, | |
1760 | const char *buf, size_t count) | |
1761 | { | |
1762 | struct srp_host *host = | |
1763 | container_of(class_dev, struct srp_host, class_dev); | |
1764 | struct Scsi_Host *target_host; | |
1765 | struct srp_target_port *target; | |
1766 | int ret; | |
1767 | int i; | |
1768 | ||
1769 | target_host = scsi_host_alloc(&srp_template, | |
1770 | sizeof (struct srp_target_port)); | |
1771 | if (!target_host) | |
1772 | return -ENOMEM; | |
1773 | ||
3c8edf0e AR |
1774 | target_host->max_lun = SRP_MAX_LUN; |
1775 | target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; | |
5f068992 | 1776 | |
aef9ec39 | 1777 | target = host_to_target(target_host); |
aef9ec39 | 1778 | |
0c0450db | 1779 | target->io_class = SRP_REV16A_IB_IO_CLASS; |
aef9ec39 RD |
1780 | target->scsi_host = target_host; |
1781 | target->srp_host = host; | |
1782 | ||
d945e1df | 1783 | INIT_LIST_HEAD(&target->free_reqs); |
aef9ec39 | 1784 | INIT_LIST_HEAD(&target->req_queue); |
d945e1df RD |
1785 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
1786 | target->req_ring[i].index = i; | |
1787 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
1788 | } | |
aef9ec39 RD |
1789 | |
1790 | ret = srp_parse_options(buf, target); | |
1791 | if (ret) | |
1792 | goto err; | |
1793 | ||
f5358a17 | 1794 | ib_get_cached_gid(host->dev->dev, host->port, 0, &target->path.sgid); |
aef9ec39 RD |
1795 | |
1796 | printk(KERN_DEBUG PFX "new target: id_ext %016llx ioc_guid %016llx pkey %04x " | |
1797 | "service_id %016llx dgid %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1798 | (unsigned long long) be64_to_cpu(target->id_ext), | |
1799 | (unsigned long long) be64_to_cpu(target->ioc_guid), | |
1800 | be16_to_cpu(target->path.pkey), | |
1801 | (unsigned long long) be64_to_cpu(target->service_id), | |
1802 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[0]), | |
1803 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[2]), | |
1804 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[4]), | |
1805 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[6]), | |
1806 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[8]), | |
1807 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[10]), | |
1808 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[12]), | |
1809 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[14])); | |
1810 | ||
1811 | ret = srp_create_target_ib(target); | |
1812 | if (ret) | |
1813 | goto err; | |
1814 | ||
f5358a17 | 1815 | target->cm_id = ib_create_cm_id(host->dev->dev, srp_cm_handler, target); |
aef9ec39 RD |
1816 | if (IS_ERR(target->cm_id)) { |
1817 | ret = PTR_ERR(target->cm_id); | |
1818 | goto err_free; | |
1819 | } | |
1820 | ||
1033ff67 | 1821 | target->qp_in_error = 0; |
aef9ec39 RD |
1822 | ret = srp_connect_target(target); |
1823 | if (ret) { | |
1824 | printk(KERN_ERR PFX "Connection failed\n"); | |
1825 | goto err_cm_id; | |
1826 | } | |
1827 | ||
1828 | ret = srp_add_target(host, target); | |
1829 | if (ret) | |
1830 | goto err_disconnect; | |
1831 | ||
1832 | return count; | |
1833 | ||
1834 | err_disconnect: | |
1835 | srp_disconnect_target(target); | |
1836 | ||
1837 | err_cm_id: | |
1838 | ib_destroy_cm_id(target->cm_id); | |
1839 | ||
1840 | err_free: | |
1841 | srp_free_target_ib(target); | |
1842 | ||
1843 | err: | |
1844 | scsi_host_put(target_host); | |
1845 | ||
1846 | return ret; | |
1847 | } | |
1848 | ||
1849 | static CLASS_DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); | |
1850 | ||
1851 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) | |
1852 | { | |
1853 | struct srp_host *host = | |
1854 | container_of(class_dev, struct srp_host, class_dev); | |
1855 | ||
f5358a17 | 1856 | return sprintf(buf, "%s\n", host->dev->dev->name); |
aef9ec39 RD |
1857 | } |
1858 | ||
1859 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
1860 | ||
1861 | static ssize_t show_port(struct class_device *class_dev, char *buf) | |
1862 | { | |
1863 | struct srp_host *host = | |
1864 | container_of(class_dev, struct srp_host, class_dev); | |
1865 | ||
1866 | return sprintf(buf, "%d\n", host->port); | |
1867 | } | |
1868 | ||
1869 | static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL); | |
1870 | ||
f5358a17 | 1871 | static struct srp_host *srp_add_port(struct srp_device *device, u8 port) |
aef9ec39 RD |
1872 | { |
1873 | struct srp_host *host; | |
1874 | ||
1875 | host = kzalloc(sizeof *host, GFP_KERNEL); | |
1876 | if (!host) | |
1877 | return NULL; | |
1878 | ||
1879 | INIT_LIST_HEAD(&host->target_list); | |
b3589fd4 | 1880 | spin_lock_init(&host->target_lock); |
aef9ec39 RD |
1881 | init_completion(&host->released); |
1882 | host->dev = device; | |
1883 | host->port = port; | |
1884 | ||
aef9ec39 | 1885 | host->class_dev.class = &srp_class; |
f5358a17 | 1886 | host->class_dev.dev = device->dev->dma_device; |
aef9ec39 | 1887 | snprintf(host->class_dev.class_id, BUS_ID_SIZE, "srp-%s-%d", |
f5358a17 | 1888 | device->dev->name, port); |
aef9ec39 RD |
1889 | |
1890 | if (class_device_register(&host->class_dev)) | |
f5358a17 | 1891 | goto free_host; |
aef9ec39 RD |
1892 | if (class_device_create_file(&host->class_dev, &class_device_attr_add_target)) |
1893 | goto err_class; | |
1894 | if (class_device_create_file(&host->class_dev, &class_device_attr_ibdev)) | |
1895 | goto err_class; | |
1896 | if (class_device_create_file(&host->class_dev, &class_device_attr_port)) | |
1897 | goto err_class; | |
1898 | ||
1899 | return host; | |
1900 | ||
1901 | err_class: | |
1902 | class_device_unregister(&host->class_dev); | |
1903 | ||
f5358a17 | 1904 | free_host: |
aef9ec39 RD |
1905 | kfree(host); |
1906 | ||
1907 | return NULL; | |
1908 | } | |
1909 | ||
1910 | static void srp_add_one(struct ib_device *device) | |
1911 | { | |
f5358a17 RD |
1912 | struct srp_device *srp_dev; |
1913 | struct ib_device_attr *dev_attr; | |
1914 | struct ib_fmr_pool_param fmr_param; | |
aef9ec39 | 1915 | struct srp_host *host; |
aef9ec39 RD |
1916 | int s, e, p; |
1917 | ||
f5358a17 RD |
1918 | dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); |
1919 | if (!dev_attr) | |
cf311cd4 | 1920 | return; |
aef9ec39 | 1921 | |
f5358a17 RD |
1922 | if (ib_query_device(device, dev_attr)) { |
1923 | printk(KERN_WARNING PFX "Query device failed for %s\n", | |
1924 | device->name); | |
1925 | goto free_attr; | |
1926 | } | |
1927 | ||
1928 | srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); | |
1929 | if (!srp_dev) | |
1930 | goto free_attr; | |
1931 | ||
1932 | /* | |
1933 | * Use the smallest page size supported by the HCA, down to a | |
1934 | * minimum of 512 bytes (which is the smallest sector that a | |
1935 | * SCSI command will ever carry). | |
1936 | */ | |
1937 | srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); | |
1938 | srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; | |
bf628dc2 | 1939 | srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1); |
f5358a17 RD |
1940 | |
1941 | INIT_LIST_HEAD(&srp_dev->dev_list); | |
1942 | ||
1943 | srp_dev->dev = device; | |
1944 | srp_dev->pd = ib_alloc_pd(device); | |
1945 | if (IS_ERR(srp_dev->pd)) | |
1946 | goto free_dev; | |
1947 | ||
1948 | srp_dev->mr = ib_get_dma_mr(srp_dev->pd, | |
1949 | IB_ACCESS_LOCAL_WRITE | | |
1950 | IB_ACCESS_REMOTE_READ | | |
1951 | IB_ACCESS_REMOTE_WRITE); | |
1952 | if (IS_ERR(srp_dev->mr)) | |
1953 | goto err_pd; | |
1954 | ||
1955 | memset(&fmr_param, 0, sizeof fmr_param); | |
1956 | fmr_param.pool_size = SRP_FMR_POOL_SIZE; | |
1957 | fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; | |
1958 | fmr_param.cache = 1; | |
1959 | fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; | |
1960 | fmr_param.page_shift = srp_dev->fmr_page_shift; | |
1961 | fmr_param.access = (IB_ACCESS_LOCAL_WRITE | | |
1962 | IB_ACCESS_REMOTE_WRITE | | |
1963 | IB_ACCESS_REMOTE_READ); | |
1964 | ||
1965 | srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); | |
1966 | if (IS_ERR(srp_dev->fmr_pool)) | |
1967 | srp_dev->fmr_pool = NULL; | |
aef9ec39 | 1968 | |
07ebafba | 1969 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
aef9ec39 RD |
1970 | s = 0; |
1971 | e = 0; | |
1972 | } else { | |
1973 | s = 1; | |
1974 | e = device->phys_port_cnt; | |
1975 | } | |
1976 | ||
1977 | for (p = s; p <= e; ++p) { | |
f5358a17 | 1978 | host = srp_add_port(srp_dev, p); |
aef9ec39 | 1979 | if (host) |
f5358a17 | 1980 | list_add_tail(&host->list, &srp_dev->dev_list); |
aef9ec39 RD |
1981 | } |
1982 | ||
f5358a17 RD |
1983 | ib_set_client_data(device, &srp_client, srp_dev); |
1984 | ||
1985 | goto free_attr; | |
1986 | ||
1987 | err_pd: | |
1988 | ib_dealloc_pd(srp_dev->pd); | |
1989 | ||
1990 | free_dev: | |
1991 | kfree(srp_dev); | |
1992 | ||
1993 | free_attr: | |
1994 | kfree(dev_attr); | |
aef9ec39 RD |
1995 | } |
1996 | ||
1997 | static void srp_remove_one(struct ib_device *device) | |
1998 | { | |
f5358a17 | 1999 | struct srp_device *srp_dev; |
aef9ec39 RD |
2000 | struct srp_host *host, *tmp_host; |
2001 | LIST_HEAD(target_list); | |
2002 | struct srp_target_port *target, *tmp_target; | |
aef9ec39 | 2003 | |
f5358a17 | 2004 | srp_dev = ib_get_client_data(device, &srp_client); |
aef9ec39 | 2005 | |
f5358a17 | 2006 | list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { |
aef9ec39 RD |
2007 | class_device_unregister(&host->class_dev); |
2008 | /* | |
2009 | * Wait for the sysfs entry to go away, so that no new | |
2010 | * target ports can be created. | |
2011 | */ | |
2012 | wait_for_completion(&host->released); | |
2013 | ||
2014 | /* | |
2015 | * Mark all target ports as removed, so we stop queueing | |
2016 | * commands and don't try to reconnect. | |
2017 | */ | |
b3589fd4 | 2018 | spin_lock(&host->target_lock); |
549c5fc2 | 2019 | list_for_each_entry(target, &host->target_list, list) { |
0c5b3952 IR |
2020 | spin_lock_irq(target->scsi_host->host_lock); |
2021 | target->state = SRP_TARGET_REMOVED; | |
2022 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 | 2023 | } |
b3589fd4 | 2024 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
2025 | |
2026 | /* | |
2027 | * Wait for any reconnection tasks that may have | |
2028 | * started before we marked our target ports as | |
2029 | * removed, and any target port removal tasks. | |
2030 | */ | |
2031 | flush_scheduled_work(); | |
2032 | ||
2033 | list_for_each_entry_safe(target, tmp_target, | |
2034 | &host->target_list, list) { | |
2035 | scsi_remove_host(target->scsi_host); | |
2036 | srp_disconnect_target(target); | |
2037 | ib_destroy_cm_id(target->cm_id); | |
2038 | srp_free_target_ib(target); | |
2039 | scsi_host_put(target->scsi_host); | |
2040 | } | |
2041 | ||
aef9ec39 RD |
2042 | kfree(host); |
2043 | } | |
2044 | ||
f5358a17 RD |
2045 | if (srp_dev->fmr_pool) |
2046 | ib_destroy_fmr_pool(srp_dev->fmr_pool); | |
2047 | ib_dereg_mr(srp_dev->mr); | |
2048 | ib_dealloc_pd(srp_dev->pd); | |
2049 | ||
2050 | kfree(srp_dev); | |
aef9ec39 RD |
2051 | } |
2052 | ||
2053 | static int __init srp_init_module(void) | |
2054 | { | |
2055 | int ret; | |
2056 | ||
74b0a15b VP |
2057 | srp_template.sg_tablesize = srp_sg_tablesize; |
2058 | srp_max_iu_len = (sizeof (struct srp_cmd) + | |
2059 | sizeof (struct srp_indirect_buf) + | |
2060 | srp_sg_tablesize * 16); | |
2061 | ||
aef9ec39 RD |
2062 | ret = class_register(&srp_class); |
2063 | if (ret) { | |
2064 | printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); | |
2065 | return ret; | |
2066 | } | |
2067 | ||
c1a0b23b MT |
2068 | ib_sa_register_client(&srp_sa_client); |
2069 | ||
aef9ec39 RD |
2070 | ret = ib_register_client(&srp_client); |
2071 | if (ret) { | |
2072 | printk(KERN_ERR PFX "couldn't register IB client\n"); | |
c1a0b23b | 2073 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 RD |
2074 | class_unregister(&srp_class); |
2075 | return ret; | |
2076 | } | |
2077 | ||
2078 | return 0; | |
2079 | } | |
2080 | ||
2081 | static void __exit srp_cleanup_module(void) | |
2082 | { | |
2083 | ib_unregister_client(&srp_client); | |
c1a0b23b | 2084 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 RD |
2085 | class_unregister(&srp_class); |
2086 | } | |
2087 | ||
2088 | module_init(srp_init_module); | |
2089 | module_exit(srp_cleanup_module); |