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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> | |
3236822b | 50 | #include <scsi/scsi_transport_srp.h> |
aef9ec39 RD |
51 | |
52 | #include <rdma/ib_cache.h> | |
53 | ||
54 | #include "ib_srp.h" | |
55 | ||
56 | #define DRV_NAME "ib_srp" | |
57 | #define PFX DRV_NAME ": " | |
58 | #define DRV_VERSION "0.2" | |
59 | #define DRV_RELDATE "November 1, 2005" | |
60 | ||
61 | MODULE_AUTHOR("Roland Dreier"); | |
62 | MODULE_DESCRIPTION("InfiniBand SCSI RDMA Protocol initiator " | |
63 | "v" DRV_VERSION " (" DRV_RELDATE ")"); | |
64 | MODULE_LICENSE("Dual BSD/GPL"); | |
65 | ||
74b0a15b VP |
66 | static int srp_sg_tablesize = SRP_DEF_SG_TABLESIZE; |
67 | static int srp_max_iu_len; | |
68 | ||
69 | module_param(srp_sg_tablesize, int, 0444); | |
70 | MODULE_PARM_DESC(srp_sg_tablesize, | |
71 | "Max number of gather/scatter entries per I/O (default is 12)"); | |
72 | ||
aef9ec39 RD |
73 | static int topspin_workarounds = 1; |
74 | ||
75 | module_param(topspin_workarounds, int, 0444); | |
76 | MODULE_PARM_DESC(topspin_workarounds, | |
77 | "Enable workarounds for Topspin/Cisco SRP target bugs if != 0"); | |
78 | ||
559ce8f1 IR |
79 | static int mellanox_workarounds = 1; |
80 | ||
81 | module_param(mellanox_workarounds, int, 0444); | |
82 | MODULE_PARM_DESC(mellanox_workarounds, | |
83 | "Enable workarounds for Mellanox SRP target bugs if != 0"); | |
84 | ||
aef9ec39 RD |
85 | static void srp_add_one(struct ib_device *device); |
86 | static void srp_remove_one(struct ib_device *device); | |
87 | static void srp_completion(struct ib_cq *cq, void *target_ptr); | |
88 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event); | |
89 | ||
3236822b FT |
90 | static struct scsi_transport_template *ib_srp_transport_template; |
91 | ||
aef9ec39 RD |
92 | static struct ib_client srp_client = { |
93 | .name = "srp", | |
94 | .add = srp_add_one, | |
95 | .remove = srp_remove_one | |
96 | }; | |
97 | ||
c1a0b23b MT |
98 | static struct ib_sa_client srp_sa_client; |
99 | ||
aef9ec39 RD |
100 | static inline struct srp_target_port *host_to_target(struct Scsi_Host *host) |
101 | { | |
102 | return (struct srp_target_port *) host->hostdata; | |
103 | } | |
104 | ||
105 | static const char *srp_target_info(struct Scsi_Host *host) | |
106 | { | |
107 | return host_to_target(host)->target_name; | |
108 | } | |
109 | ||
5d7cbfd6 RD |
110 | static int srp_target_is_topspin(struct srp_target_port *target) |
111 | { | |
112 | static const u8 topspin_oui[3] = { 0x00, 0x05, 0xad }; | |
3d1ff48d | 113 | static const u8 cisco_oui[3] = { 0x00, 0x1b, 0x0d }; |
5d7cbfd6 RD |
114 | |
115 | return topspin_workarounds && | |
3d1ff48d RK |
116 | (!memcmp(&target->ioc_guid, topspin_oui, sizeof topspin_oui) || |
117 | !memcmp(&target->ioc_guid, cisco_oui, sizeof cisco_oui)); | |
5d7cbfd6 RD |
118 | } |
119 | ||
120 | static int srp_target_is_mellanox(struct srp_target_port *target) | |
121 | { | |
122 | static const u8 mellanox_oui[3] = { 0x00, 0x02, 0xc9 }; | |
123 | ||
124 | return mellanox_workarounds && | |
125 | !memcmp(&target->ioc_guid, mellanox_oui, sizeof mellanox_oui); | |
126 | } | |
127 | ||
aef9ec39 RD |
128 | static struct srp_iu *srp_alloc_iu(struct srp_host *host, size_t size, |
129 | gfp_t gfp_mask, | |
130 | enum dma_data_direction direction) | |
131 | { | |
132 | struct srp_iu *iu; | |
133 | ||
134 | iu = kmalloc(sizeof *iu, gfp_mask); | |
135 | if (!iu) | |
136 | goto out; | |
137 | ||
138 | iu->buf = kzalloc(size, gfp_mask); | |
139 | if (!iu->buf) | |
140 | goto out_free_iu; | |
141 | ||
85507bcc RC |
142 | iu->dma = ib_dma_map_single(host->dev->dev, iu->buf, size, direction); |
143 | if (ib_dma_mapping_error(host->dev->dev, iu->dma)) | |
aef9ec39 RD |
144 | goto out_free_buf; |
145 | ||
146 | iu->size = size; | |
147 | iu->direction = direction; | |
148 | ||
149 | return iu; | |
150 | ||
151 | out_free_buf: | |
152 | kfree(iu->buf); | |
153 | out_free_iu: | |
154 | kfree(iu); | |
155 | out: | |
156 | return NULL; | |
157 | } | |
158 | ||
159 | static void srp_free_iu(struct srp_host *host, struct srp_iu *iu) | |
160 | { | |
161 | if (!iu) | |
162 | return; | |
163 | ||
85507bcc | 164 | ib_dma_unmap_single(host->dev->dev, iu->dma, iu->size, iu->direction); |
aef9ec39 RD |
165 | kfree(iu->buf); |
166 | kfree(iu); | |
167 | } | |
168 | ||
169 | static void srp_qp_event(struct ib_event *event, void *context) | |
170 | { | |
171 | printk(KERN_ERR PFX "QP event %d\n", event->event); | |
172 | } | |
173 | ||
174 | static int srp_init_qp(struct srp_target_port *target, | |
175 | struct ib_qp *qp) | |
176 | { | |
177 | struct ib_qp_attr *attr; | |
178 | int ret; | |
179 | ||
180 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
181 | if (!attr) | |
182 | return -ENOMEM; | |
183 | ||
f5358a17 | 184 | ret = ib_find_cached_pkey(target->srp_host->dev->dev, |
aef9ec39 RD |
185 | target->srp_host->port, |
186 | be16_to_cpu(target->path.pkey), | |
187 | &attr->pkey_index); | |
188 | if (ret) | |
189 | goto out; | |
190 | ||
191 | attr->qp_state = IB_QPS_INIT; | |
192 | attr->qp_access_flags = (IB_ACCESS_REMOTE_READ | | |
193 | IB_ACCESS_REMOTE_WRITE); | |
194 | attr->port_num = target->srp_host->port; | |
195 | ||
196 | ret = ib_modify_qp(qp, attr, | |
197 | IB_QP_STATE | | |
198 | IB_QP_PKEY_INDEX | | |
199 | IB_QP_ACCESS_FLAGS | | |
200 | IB_QP_PORT); | |
201 | ||
202 | out: | |
203 | kfree(attr); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | static int srp_create_target_ib(struct srp_target_port *target) | |
208 | { | |
209 | struct ib_qp_init_attr *init_attr; | |
210 | int ret; | |
211 | ||
212 | init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); | |
213 | if (!init_attr) | |
214 | return -ENOMEM; | |
215 | ||
f5358a17 | 216 | target->cq = ib_create_cq(target->srp_host->dev->dev, srp_completion, |
f4fd0b22 | 217 | NULL, target, SRP_CQ_SIZE, 0); |
aef9ec39 RD |
218 | if (IS_ERR(target->cq)) { |
219 | ret = PTR_ERR(target->cq); | |
220 | goto out; | |
221 | } | |
222 | ||
223 | ib_req_notify_cq(target->cq, IB_CQ_NEXT_COMP); | |
224 | ||
225 | init_attr->event_handler = srp_qp_event; | |
226 | init_attr->cap.max_send_wr = SRP_SQ_SIZE; | |
227 | init_attr->cap.max_recv_wr = SRP_RQ_SIZE; | |
228 | init_attr->cap.max_recv_sge = 1; | |
229 | init_attr->cap.max_send_sge = 1; | |
230 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
231 | init_attr->qp_type = IB_QPT_RC; | |
232 | init_attr->send_cq = target->cq; | |
233 | init_attr->recv_cq = target->cq; | |
234 | ||
f5358a17 | 235 | target->qp = ib_create_qp(target->srp_host->dev->pd, init_attr); |
aef9ec39 RD |
236 | if (IS_ERR(target->qp)) { |
237 | ret = PTR_ERR(target->qp); | |
238 | ib_destroy_cq(target->cq); | |
239 | goto out; | |
240 | } | |
241 | ||
242 | ret = srp_init_qp(target, target->qp); | |
243 | if (ret) { | |
244 | ib_destroy_qp(target->qp); | |
245 | ib_destroy_cq(target->cq); | |
246 | goto out; | |
247 | } | |
248 | ||
249 | out: | |
250 | kfree(init_attr); | |
251 | return ret; | |
252 | } | |
253 | ||
254 | static void srp_free_target_ib(struct srp_target_port *target) | |
255 | { | |
256 | int i; | |
257 | ||
258 | ib_destroy_qp(target->qp); | |
259 | ib_destroy_cq(target->cq); | |
260 | ||
261 | for (i = 0; i < SRP_RQ_SIZE; ++i) | |
262 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
263 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) | |
264 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
265 | } | |
266 | ||
267 | static void srp_path_rec_completion(int status, | |
268 | struct ib_sa_path_rec *pathrec, | |
269 | void *target_ptr) | |
270 | { | |
271 | struct srp_target_port *target = target_ptr; | |
272 | ||
273 | target->status = status; | |
274 | if (status) | |
275 | printk(KERN_ERR PFX "Got failed path rec status %d\n", status); | |
276 | else | |
277 | target->path = *pathrec; | |
278 | complete(&target->done); | |
279 | } | |
280 | ||
281 | static int srp_lookup_path(struct srp_target_port *target) | |
282 | { | |
283 | target->path.numb_path = 1; | |
284 | ||
285 | init_completion(&target->done); | |
286 | ||
c1a0b23b MT |
287 | target->path_query_id = ib_sa_path_rec_get(&srp_sa_client, |
288 | target->srp_host->dev->dev, | |
aef9ec39 RD |
289 | target->srp_host->port, |
290 | &target->path, | |
247e020e | 291 | IB_SA_PATH_REC_SERVICE_ID | |
aef9ec39 RD |
292 | IB_SA_PATH_REC_DGID | |
293 | IB_SA_PATH_REC_SGID | | |
294 | IB_SA_PATH_REC_NUMB_PATH | | |
295 | IB_SA_PATH_REC_PKEY, | |
296 | SRP_PATH_REC_TIMEOUT_MS, | |
297 | GFP_KERNEL, | |
298 | srp_path_rec_completion, | |
299 | target, &target->path_query); | |
300 | if (target->path_query_id < 0) | |
301 | return target->path_query_id; | |
302 | ||
303 | wait_for_completion(&target->done); | |
304 | ||
305 | if (target->status < 0) | |
306 | printk(KERN_WARNING PFX "Path record query failed\n"); | |
307 | ||
308 | return target->status; | |
309 | } | |
310 | ||
311 | static int srp_send_req(struct srp_target_port *target) | |
312 | { | |
313 | struct { | |
314 | struct ib_cm_req_param param; | |
315 | struct srp_login_req priv; | |
316 | } *req = NULL; | |
317 | int status; | |
318 | ||
319 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
320 | if (!req) | |
321 | return -ENOMEM; | |
322 | ||
323 | req->param.primary_path = &target->path; | |
324 | req->param.alternate_path = NULL; | |
325 | req->param.service_id = target->service_id; | |
326 | req->param.qp_num = target->qp->qp_num; | |
327 | req->param.qp_type = target->qp->qp_type; | |
328 | req->param.private_data = &req->priv; | |
329 | req->param.private_data_len = sizeof req->priv; | |
330 | req->param.flow_control = 1; | |
331 | ||
332 | get_random_bytes(&req->param.starting_psn, 4); | |
333 | req->param.starting_psn &= 0xffffff; | |
334 | ||
335 | /* | |
336 | * Pick some arbitrary defaults here; we could make these | |
337 | * module parameters if anyone cared about setting them. | |
338 | */ | |
339 | req->param.responder_resources = 4; | |
340 | req->param.remote_cm_response_timeout = 20; | |
341 | req->param.local_cm_response_timeout = 20; | |
342 | req->param.retry_count = 7; | |
343 | req->param.rnr_retry_count = 7; | |
344 | req->param.max_cm_retries = 15; | |
345 | ||
346 | req->priv.opcode = SRP_LOGIN_REQ; | |
347 | req->priv.tag = 0; | |
74b0a15b | 348 | req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); |
aef9ec39 RD |
349 | req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | |
350 | SRP_BUF_FORMAT_INDIRECT); | |
0c0450db | 351 | /* |
3cd96564 | 352 | * In the published SRP specification (draft rev. 16a), the |
0c0450db R |
353 | * port identifier format is 8 bytes of ID extension followed |
354 | * by 8 bytes of GUID. Older drafts put the two halves in the | |
355 | * opposite order, so that the GUID comes first. | |
356 | * | |
357 | * Targets conforming to these obsolete drafts can be | |
358 | * recognized by the I/O Class they report. | |
359 | */ | |
360 | if (target->io_class == SRP_REV10_IB_IO_CLASS) { | |
361 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb | 362 | &target->path.sgid.global.interface_id, 8); |
0c0450db | 363 | memcpy(req->priv.initiator_port_id + 8, |
01cb9bcb | 364 | &target->initiator_ext, 8); |
0c0450db R |
365 | memcpy(req->priv.target_port_id, &target->ioc_guid, 8); |
366 | memcpy(req->priv.target_port_id + 8, &target->id_ext, 8); | |
367 | } else { | |
368 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb IR |
369 | &target->initiator_ext, 8); |
370 | memcpy(req->priv.initiator_port_id + 8, | |
371 | &target->path.sgid.global.interface_id, 8); | |
0c0450db R |
372 | memcpy(req->priv.target_port_id, &target->id_ext, 8); |
373 | memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); | |
374 | } | |
375 | ||
aef9ec39 RD |
376 | /* |
377 | * Topspin/Cisco SRP targets will reject our login unless we | |
01cb9bcb IR |
378 | * zero out the first 8 bytes of our initiator port ID and set |
379 | * the second 8 bytes to the local node GUID. | |
aef9ec39 | 380 | */ |
5d7cbfd6 | 381 | if (srp_target_is_topspin(target)) { |
aef9ec39 RD |
382 | printk(KERN_DEBUG PFX "Topspin/Cisco initiator port ID workaround " |
383 | "activated for target GUID %016llx\n", | |
384 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
385 | memset(req->priv.initiator_port_id, 0, 8); | |
01cb9bcb IR |
386 | memcpy(req->priv.initiator_port_id + 8, |
387 | &target->srp_host->dev->dev->node_guid, 8); | |
aef9ec39 | 388 | } |
aef9ec39 RD |
389 | |
390 | status = ib_send_cm_req(target->cm_id, &req->param); | |
391 | ||
392 | kfree(req); | |
393 | ||
394 | return status; | |
395 | } | |
396 | ||
397 | static void srp_disconnect_target(struct srp_target_port *target) | |
398 | { | |
399 | /* XXX should send SRP_I_LOGOUT request */ | |
400 | ||
401 | init_completion(&target->done); | |
e6581056 RD |
402 | if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { |
403 | printk(KERN_DEBUG PFX "Sending CM DREQ failed\n"); | |
404 | return; | |
405 | } | |
aef9ec39 RD |
406 | wait_for_completion(&target->done); |
407 | } | |
408 | ||
c4028958 | 409 | static void srp_remove_work(struct work_struct *work) |
aef9ec39 | 410 | { |
c4028958 DH |
411 | struct srp_target_port *target = |
412 | container_of(work, struct srp_target_port, work); | |
aef9ec39 RD |
413 | |
414 | spin_lock_irq(target->scsi_host->host_lock); | |
415 | if (target->state != SRP_TARGET_DEAD) { | |
416 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 RD |
417 | return; |
418 | } | |
419 | target->state = SRP_TARGET_REMOVED; | |
420 | spin_unlock_irq(target->scsi_host->host_lock); | |
421 | ||
b3589fd4 | 422 | spin_lock(&target->srp_host->target_lock); |
aef9ec39 | 423 | list_del(&target->list); |
b3589fd4 | 424 | spin_unlock(&target->srp_host->target_lock); |
aef9ec39 | 425 | |
3236822b | 426 | srp_remove_host(target->scsi_host); |
aef9ec39 RD |
427 | scsi_remove_host(target->scsi_host); |
428 | ib_destroy_cm_id(target->cm_id); | |
429 | srp_free_target_ib(target); | |
430 | scsi_host_put(target->scsi_host); | |
aef9ec39 RD |
431 | } |
432 | ||
433 | static int srp_connect_target(struct srp_target_port *target) | |
434 | { | |
435 | int ret; | |
436 | ||
437 | ret = srp_lookup_path(target); | |
438 | if (ret) | |
439 | return ret; | |
440 | ||
441 | while (1) { | |
442 | init_completion(&target->done); | |
443 | ret = srp_send_req(target); | |
444 | if (ret) | |
445 | return ret; | |
446 | wait_for_completion(&target->done); | |
447 | ||
448 | /* | |
449 | * The CM event handling code will set status to | |
450 | * SRP_PORT_REDIRECT if we get a port redirect REJ | |
451 | * back, or SRP_DLID_REDIRECT if we get a lid/qp | |
452 | * redirect REJ back. | |
453 | */ | |
454 | switch (target->status) { | |
455 | case 0: | |
456 | return 0; | |
457 | ||
458 | case SRP_PORT_REDIRECT: | |
459 | ret = srp_lookup_path(target); | |
460 | if (ret) | |
461 | return ret; | |
462 | break; | |
463 | ||
464 | case SRP_DLID_REDIRECT: | |
465 | break; | |
466 | ||
467 | default: | |
468 | return target->status; | |
469 | } | |
470 | } | |
471 | } | |
472 | ||
d945e1df RD |
473 | static void srp_unmap_data(struct scsi_cmnd *scmnd, |
474 | struct srp_target_port *target, | |
475 | struct srp_request *req) | |
476 | { | |
bb350d1d | 477 | if (!scsi_sglist(scmnd) || |
d945e1df RD |
478 | (scmnd->sc_data_direction != DMA_TO_DEVICE && |
479 | scmnd->sc_data_direction != DMA_FROM_DEVICE)) | |
480 | return; | |
481 | ||
f5358a17 RD |
482 | if (req->fmr) { |
483 | ib_fmr_pool_unmap(req->fmr); | |
484 | req->fmr = NULL; | |
485 | } | |
486 | ||
bb350d1d FT |
487 | ib_dma_unmap_sg(target->srp_host->dev->dev, scsi_sglist(scmnd), |
488 | scsi_sg_count(scmnd), scmnd->sc_data_direction); | |
d945e1df RD |
489 | } |
490 | ||
526b4caa IR |
491 | static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) |
492 | { | |
493 | srp_unmap_data(req->scmnd, target, req); | |
494 | list_move_tail(&req->list, &target->free_reqs); | |
495 | } | |
496 | ||
497 | static void srp_reset_req(struct srp_target_port *target, struct srp_request *req) | |
498 | { | |
499 | req->scmnd->result = DID_RESET << 16; | |
500 | req->scmnd->scsi_done(req->scmnd); | |
501 | srp_remove_req(target, req); | |
502 | } | |
503 | ||
aef9ec39 RD |
504 | static int srp_reconnect_target(struct srp_target_port *target) |
505 | { | |
506 | struct ib_cm_id *new_cm_id; | |
507 | struct ib_qp_attr qp_attr; | |
526b4caa | 508 | struct srp_request *req, *tmp; |
aef9ec39 RD |
509 | struct ib_wc wc; |
510 | int ret; | |
aef9ec39 RD |
511 | |
512 | spin_lock_irq(target->scsi_host->host_lock); | |
513 | if (target->state != SRP_TARGET_LIVE) { | |
514 | spin_unlock_irq(target->scsi_host->host_lock); | |
515 | return -EAGAIN; | |
516 | } | |
517 | target->state = SRP_TARGET_CONNECTING; | |
518 | spin_unlock_irq(target->scsi_host->host_lock); | |
519 | ||
520 | srp_disconnect_target(target); | |
521 | /* | |
522 | * Now get a new local CM ID so that we avoid confusing the | |
523 | * target in case things are really fouled up. | |
524 | */ | |
f5358a17 | 525 | new_cm_id = ib_create_cm_id(target->srp_host->dev->dev, |
aef9ec39 RD |
526 | srp_cm_handler, target); |
527 | if (IS_ERR(new_cm_id)) { | |
528 | ret = PTR_ERR(new_cm_id); | |
529 | goto err; | |
530 | } | |
531 | ib_destroy_cm_id(target->cm_id); | |
532 | target->cm_id = new_cm_id; | |
533 | ||
534 | qp_attr.qp_state = IB_QPS_RESET; | |
535 | ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); | |
536 | if (ret) | |
537 | goto err; | |
538 | ||
539 | ret = srp_init_qp(target, target->qp); | |
540 | if (ret) | |
541 | goto err; | |
542 | ||
543 | while (ib_poll_cq(target->cq, 1, &wc) > 0) | |
544 | ; /* nothing */ | |
545 | ||
d916a8f1 | 546 | spin_lock_irq(target->scsi_host->host_lock); |
526b4caa IR |
547 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) |
548 | srp_reset_req(target, req); | |
d916a8f1 | 549 | spin_unlock_irq(target->scsi_host->host_lock); |
aef9ec39 RD |
550 | |
551 | target->rx_head = 0; | |
552 | target->tx_head = 0; | |
553 | target->tx_tail = 0; | |
aef9ec39 | 554 | |
1033ff67 | 555 | target->qp_in_error = 0; |
aef9ec39 RD |
556 | ret = srp_connect_target(target); |
557 | if (ret) | |
558 | goto err; | |
559 | ||
560 | spin_lock_irq(target->scsi_host->host_lock); | |
561 | if (target->state == SRP_TARGET_CONNECTING) { | |
562 | ret = 0; | |
563 | target->state = SRP_TARGET_LIVE; | |
564 | } else | |
565 | ret = -EAGAIN; | |
566 | spin_unlock_irq(target->scsi_host->host_lock); | |
567 | ||
568 | return ret; | |
569 | ||
570 | err: | |
571 | printk(KERN_ERR PFX "reconnect failed (%d), removing target port.\n", ret); | |
572 | ||
573 | /* | |
574 | * We couldn't reconnect, so kill our target port off. | |
575 | * However, we have to defer the real removal because we might | |
576 | * be in the context of the SCSI error handler now, which | |
577 | * would deadlock if we call scsi_remove_host(). | |
578 | */ | |
579 | spin_lock_irq(target->scsi_host->host_lock); | |
580 | if (target->state == SRP_TARGET_CONNECTING) { | |
581 | target->state = SRP_TARGET_DEAD; | |
c4028958 | 582 | INIT_WORK(&target->work, srp_remove_work); |
aef9ec39 RD |
583 | schedule_work(&target->work); |
584 | } | |
585 | spin_unlock_irq(target->scsi_host->host_lock); | |
586 | ||
587 | return ret; | |
588 | } | |
589 | ||
559ce8f1 | 590 | static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat, |
f5358a17 RD |
591 | int sg_cnt, struct srp_request *req, |
592 | struct srp_direct_buf *buf) | |
593 | { | |
594 | u64 io_addr = 0; | |
595 | u64 *dma_pages; | |
596 | u32 len; | |
597 | int page_cnt; | |
598 | int i, j; | |
599 | int ret; | |
559ce8f1 | 600 | struct srp_device *dev = target->srp_host->dev; |
85507bcc | 601 | struct ib_device *ibdev = dev->dev; |
bb350d1d | 602 | struct scatterlist *sg; |
f5358a17 RD |
603 | |
604 | if (!dev->fmr_pool) | |
605 | return -ENODEV; | |
606 | ||
5d7cbfd6 RD |
607 | if (srp_target_is_mellanox(target) && |
608 | (ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask)) | |
559ce8f1 IR |
609 | return -EINVAL; |
610 | ||
f5358a17 | 611 | len = page_cnt = 0; |
bb350d1d FT |
612 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
613 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 614 | |
bb350d1d | 615 | if (ib_sg_dma_address(ibdev, sg) & ~dev->fmr_page_mask) { |
f5358a17 RD |
616 | if (i > 0) |
617 | return -EINVAL; | |
618 | else | |
619 | ++page_cnt; | |
620 | } | |
bb350d1d | 621 | if ((ib_sg_dma_address(ibdev, sg) + dma_len) & |
f5358a17 RD |
622 | ~dev->fmr_page_mask) { |
623 | if (i < sg_cnt - 1) | |
624 | return -EINVAL; | |
625 | else | |
626 | ++page_cnt; | |
627 | } | |
628 | ||
85507bcc | 629 | len += dma_len; |
f5358a17 RD |
630 | } |
631 | ||
632 | page_cnt += len >> dev->fmr_page_shift; | |
633 | if (page_cnt > SRP_FMR_SIZE) | |
634 | return -ENOMEM; | |
635 | ||
636 | dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); | |
637 | if (!dma_pages) | |
638 | return -ENOMEM; | |
639 | ||
640 | page_cnt = 0; | |
bb350d1d FT |
641 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
642 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc RC |
643 | |
644 | for (j = 0; j < dma_len; j += dev->fmr_page_size) | |
f5358a17 | 645 | dma_pages[page_cnt++] = |
bb350d1d | 646 | (ib_sg_dma_address(ibdev, sg) & |
85507bcc RC |
647 | dev->fmr_page_mask) + j; |
648 | } | |
f5358a17 RD |
649 | |
650 | req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, | |
adfaa888 | 651 | dma_pages, page_cnt, io_addr); |
f5358a17 RD |
652 | if (IS_ERR(req->fmr)) { |
653 | ret = PTR_ERR(req->fmr); | |
6583eb3d | 654 | req->fmr = NULL; |
f5358a17 RD |
655 | goto out; |
656 | } | |
657 | ||
85507bcc RC |
658 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) & |
659 | ~dev->fmr_page_mask); | |
f5358a17 RD |
660 | buf->key = cpu_to_be32(req->fmr->fmr->rkey); |
661 | buf->len = cpu_to_be32(len); | |
662 | ||
663 | ret = 0; | |
664 | ||
665 | out: | |
666 | kfree(dma_pages); | |
667 | ||
668 | return ret; | |
669 | } | |
670 | ||
aef9ec39 RD |
671 | static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, |
672 | struct srp_request *req) | |
673 | { | |
cf368713 | 674 | struct scatterlist *scat; |
aef9ec39 | 675 | struct srp_cmd *cmd = req->cmd->buf; |
cf368713 | 676 | int len, nents, count; |
f5358a17 | 677 | u8 fmt = SRP_DATA_DESC_DIRECT; |
85507bcc RC |
678 | struct srp_device *dev; |
679 | struct ib_device *ibdev; | |
aef9ec39 | 680 | |
bb350d1d | 681 | if (!scsi_sglist(scmnd) || scmnd->sc_data_direction == DMA_NONE) |
aef9ec39 RD |
682 | return sizeof (struct srp_cmd); |
683 | ||
684 | if (scmnd->sc_data_direction != DMA_FROM_DEVICE && | |
685 | scmnd->sc_data_direction != DMA_TO_DEVICE) { | |
686 | printk(KERN_WARNING PFX "Unhandled data direction %d\n", | |
687 | scmnd->sc_data_direction); | |
688 | return -EINVAL; | |
689 | } | |
690 | ||
bb350d1d FT |
691 | nents = scsi_sg_count(scmnd); |
692 | scat = scsi_sglist(scmnd); | |
aef9ec39 | 693 | |
85507bcc RC |
694 | dev = target->srp_host->dev; |
695 | ibdev = dev->dev; | |
696 | ||
697 | count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction); | |
f5358a17 RD |
698 | |
699 | fmt = SRP_DATA_DESC_DIRECT; | |
700 | len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); | |
aef9ec39 | 701 | |
cf368713 | 702 | if (count == 1) { |
f5358a17 RD |
703 | /* |
704 | * The midlayer only generated a single gather/scatter | |
705 | * entry, or DMA mapping coalesced everything to a | |
706 | * single entry. So a direct descriptor along with | |
707 | * the DMA MR suffices. | |
708 | */ | |
cf368713 | 709 | struct srp_direct_buf *buf = (void *) cmd->add_data; |
aef9ec39 | 710 | |
85507bcc RC |
711 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat)); |
712 | buf->key = cpu_to_be32(dev->mr->rkey); | |
713 | buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat)); | |
559ce8f1 | 714 | } else if (srp_map_fmr(target, scat, count, req, |
f5358a17 RD |
715 | (void *) cmd->add_data)) { |
716 | /* | |
717 | * FMR mapping failed, and the scatterlist has more | |
718 | * than one entry. Generate an indirect memory | |
719 | * descriptor. | |
720 | */ | |
cf368713 | 721 | struct srp_indirect_buf *buf = (void *) cmd->add_data; |
bb350d1d | 722 | struct scatterlist *sg; |
cf368713 | 723 | u32 datalen = 0; |
f5358a17 | 724 | int i; |
aef9ec39 | 725 | |
cf368713 | 726 | fmt = SRP_DATA_DESC_INDIRECT; |
f5358a17 RD |
727 | len = sizeof (struct srp_cmd) + |
728 | sizeof (struct srp_indirect_buf) + | |
729 | count * sizeof (struct srp_direct_buf); | |
730 | ||
bb350d1d FT |
731 | scsi_for_each_sg(scmnd, sg, count, i) { |
732 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 733 | |
f5358a17 | 734 | buf->desc_list[i].va = |
bb350d1d | 735 | cpu_to_be64(ib_sg_dma_address(ibdev, sg)); |
f5358a17 | 736 | buf->desc_list[i].key = |
85507bcc RC |
737 | cpu_to_be32(dev->mr->rkey); |
738 | buf->desc_list[i].len = cpu_to_be32(dma_len); | |
739 | datalen += dma_len; | |
f5358a17 | 740 | } |
aef9ec39 | 741 | |
cf368713 RD |
742 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) |
743 | cmd->data_out_desc_cnt = count; | |
744 | else | |
745 | cmd->data_in_desc_cnt = count; | |
746 | ||
f5358a17 RD |
747 | buf->table_desc.va = |
748 | cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); | |
cf368713 | 749 | buf->table_desc.key = |
f5358a17 | 750 | cpu_to_be32(target->srp_host->dev->mr->rkey); |
cf368713 RD |
751 | buf->table_desc.len = |
752 | cpu_to_be32(count * sizeof (struct srp_direct_buf)); | |
753 | ||
cf368713 | 754 | buf->len = cpu_to_be32(datalen); |
aef9ec39 RD |
755 | } |
756 | ||
757 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) | |
758 | cmd->buf_fmt = fmt << 4; | |
759 | else | |
760 | cmd->buf_fmt = fmt; | |
761 | ||
aef9ec39 RD |
762 | return len; |
763 | } | |
764 | ||
aef9ec39 RD |
765 | static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) |
766 | { | |
767 | struct srp_request *req; | |
768 | struct scsi_cmnd *scmnd; | |
769 | unsigned long flags; | |
770 | s32 delta; | |
771 | ||
772 | delta = (s32) be32_to_cpu(rsp->req_lim_delta); | |
773 | ||
774 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
775 | ||
776 | target->req_lim += delta; | |
777 | ||
778 | req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT]; | |
779 | ||
780 | if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { | |
781 | if (be32_to_cpu(rsp->resp_data_len) < 4) | |
782 | req->tsk_status = -1; | |
783 | else | |
784 | req->tsk_status = rsp->data[3]; | |
785 | complete(&req->done); | |
786 | } else { | |
d945e1df | 787 | scmnd = req->scmnd; |
aef9ec39 RD |
788 | if (!scmnd) |
789 | printk(KERN_ERR "Null scmnd for RSP w/tag %016llx\n", | |
790 | (unsigned long long) rsp->tag); | |
791 | scmnd->result = rsp->status; | |
792 | ||
793 | if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { | |
794 | memcpy(scmnd->sense_buffer, rsp->data + | |
795 | be32_to_cpu(rsp->resp_data_len), | |
796 | min_t(int, be32_to_cpu(rsp->sense_data_len), | |
797 | SCSI_SENSE_BUFFERSIZE)); | |
798 | } | |
799 | ||
800 | if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) | |
bb350d1d | 801 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt)); |
aef9ec39 | 802 | else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) |
bb350d1d | 803 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt)); |
aef9ec39 | 804 | |
aef9ec39 | 805 | if (!req->tsk_mgmt) { |
aef9ec39 RD |
806 | scmnd->host_scribble = (void *) -1L; |
807 | scmnd->scsi_done(scmnd); | |
808 | ||
d945e1df | 809 | srp_remove_req(target, req); |
aef9ec39 RD |
810 | } else |
811 | req->cmd_done = 1; | |
812 | } | |
813 | ||
814 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
815 | } | |
816 | ||
aef9ec39 RD |
817 | static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) |
818 | { | |
85507bcc | 819 | struct ib_device *dev; |
aef9ec39 RD |
820 | struct srp_iu *iu; |
821 | u8 opcode; | |
822 | ||
823 | iu = target->rx_ring[wc->wr_id & ~SRP_OP_RECV]; | |
824 | ||
85507bcc RC |
825 | dev = target->srp_host->dev->dev; |
826 | ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len, | |
827 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
828 | |
829 | opcode = *(u8 *) iu->buf; | |
830 | ||
831 | if (0) { | |
832 | int i; | |
833 | ||
834 | printk(KERN_ERR PFX "recv completion, opcode 0x%02x\n", opcode); | |
835 | ||
836 | for (i = 0; i < wc->byte_len; ++i) { | |
837 | if (i % 8 == 0) | |
838 | printk(KERN_ERR " [%02x] ", i); | |
839 | printk(" %02x", ((u8 *) iu->buf)[i]); | |
840 | if ((i + 1) % 8 == 0) | |
841 | printk("\n"); | |
842 | } | |
843 | ||
844 | if (wc->byte_len % 8) | |
845 | printk("\n"); | |
846 | } | |
847 | ||
848 | switch (opcode) { | |
849 | case SRP_RSP: | |
850 | srp_process_rsp(target, iu->buf); | |
851 | break; | |
852 | ||
853 | case SRP_T_LOGOUT: | |
854 | /* XXX Handle target logout */ | |
855 | printk(KERN_WARNING PFX "Got target logout request\n"); | |
856 | break; | |
857 | ||
858 | default: | |
859 | printk(KERN_WARNING PFX "Unhandled SRP opcode 0x%02x\n", opcode); | |
860 | break; | |
861 | } | |
862 | ||
85507bcc RC |
863 | ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len, |
864 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
865 | } |
866 | ||
867 | static void srp_completion(struct ib_cq *cq, void *target_ptr) | |
868 | { | |
869 | struct srp_target_port *target = target_ptr; | |
870 | struct ib_wc wc; | |
aef9ec39 RD |
871 | |
872 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
873 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
874 | if (wc.status) { | |
875 | printk(KERN_ERR PFX "failed %s status %d\n", | |
876 | wc.wr_id & SRP_OP_RECV ? "receive" : "send", | |
877 | wc.status); | |
1033ff67 | 878 | target->qp_in_error = 1; |
aef9ec39 RD |
879 | break; |
880 | } | |
881 | ||
882 | if (wc.wr_id & SRP_OP_RECV) | |
883 | srp_handle_recv(target, &wc); | |
884 | else | |
885 | ++target->tx_tail; | |
886 | } | |
887 | } | |
888 | ||
889 | static int __srp_post_recv(struct srp_target_port *target) | |
890 | { | |
891 | struct srp_iu *iu; | |
892 | struct ib_sge list; | |
893 | struct ib_recv_wr wr, *bad_wr; | |
894 | unsigned int next; | |
895 | int ret; | |
896 | ||
897 | next = target->rx_head & (SRP_RQ_SIZE - 1); | |
898 | wr.wr_id = next | SRP_OP_RECV; | |
899 | iu = target->rx_ring[next]; | |
900 | ||
901 | list.addr = iu->dma; | |
902 | list.length = iu->size; | |
f5358a17 | 903 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
904 | |
905 | wr.next = NULL; | |
906 | wr.sg_list = &list; | |
907 | wr.num_sge = 1; | |
908 | ||
909 | ret = ib_post_recv(target->qp, &wr, &bad_wr); | |
910 | if (!ret) | |
911 | ++target->rx_head; | |
912 | ||
913 | return ret; | |
914 | } | |
915 | ||
916 | static int srp_post_recv(struct srp_target_port *target) | |
917 | { | |
918 | unsigned long flags; | |
919 | int ret; | |
920 | ||
921 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
922 | ret = __srp_post_recv(target); | |
923 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
924 | ||
925 | return ret; | |
926 | } | |
927 | ||
928 | /* | |
929 | * Must be called with target->scsi_host->host_lock held to protect | |
47f2bce9 RD |
930 | * req_lim and tx_head. Lock cannot be dropped between call here and |
931 | * call to __srp_post_send(). | |
aef9ec39 RD |
932 | */ |
933 | static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target) | |
934 | { | |
935 | if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) | |
936 | return NULL; | |
937 | ||
6bfa24fa RD |
938 | if (unlikely(target->req_lim < 1)) |
939 | ++target->zero_req_lim; | |
47f2bce9 | 940 | |
aef9ec39 RD |
941 | return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; |
942 | } | |
943 | ||
944 | /* | |
945 | * Must be called with target->scsi_host->host_lock held to protect | |
946 | * req_lim and tx_head. | |
947 | */ | |
948 | static int __srp_post_send(struct srp_target_port *target, | |
949 | struct srp_iu *iu, int len) | |
950 | { | |
951 | struct ib_sge list; | |
952 | struct ib_send_wr wr, *bad_wr; | |
953 | int ret = 0; | |
954 | ||
aef9ec39 RD |
955 | list.addr = iu->dma; |
956 | list.length = len; | |
f5358a17 | 957 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
958 | |
959 | wr.next = NULL; | |
960 | wr.wr_id = target->tx_head & SRP_SQ_SIZE; | |
961 | wr.sg_list = &list; | |
962 | wr.num_sge = 1; | |
963 | wr.opcode = IB_WR_SEND; | |
964 | wr.send_flags = IB_SEND_SIGNALED; | |
965 | ||
966 | ret = ib_post_send(target->qp, &wr, &bad_wr); | |
967 | ||
968 | if (!ret) { | |
969 | ++target->tx_head; | |
970 | --target->req_lim; | |
971 | } | |
972 | ||
973 | return ret; | |
974 | } | |
975 | ||
976 | static int srp_queuecommand(struct scsi_cmnd *scmnd, | |
977 | void (*done)(struct scsi_cmnd *)) | |
978 | { | |
979 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
980 | struct srp_request *req; | |
981 | struct srp_iu *iu; | |
982 | struct srp_cmd *cmd; | |
85507bcc | 983 | struct ib_device *dev; |
aef9ec39 RD |
984 | int len; |
985 | ||
986 | if (target->state == SRP_TARGET_CONNECTING) | |
987 | goto err; | |
988 | ||
989 | if (target->state == SRP_TARGET_DEAD || | |
990 | target->state == SRP_TARGET_REMOVED) { | |
991 | scmnd->result = DID_BAD_TARGET << 16; | |
992 | done(scmnd); | |
993 | return 0; | |
994 | } | |
995 | ||
996 | iu = __srp_get_tx_iu(target); | |
997 | if (!iu) | |
998 | goto err; | |
999 | ||
85507bcc RC |
1000 | dev = target->srp_host->dev->dev; |
1001 | ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len, | |
1002 | DMA_TO_DEVICE); | |
aef9ec39 | 1003 | |
d945e1df | 1004 | req = list_entry(target->free_reqs.next, struct srp_request, list); |
aef9ec39 RD |
1005 | |
1006 | scmnd->scsi_done = done; | |
1007 | scmnd->result = 0; | |
d945e1df | 1008 | scmnd->host_scribble = (void *) (long) req->index; |
aef9ec39 RD |
1009 | |
1010 | cmd = iu->buf; | |
1011 | memset(cmd, 0, sizeof *cmd); | |
1012 | ||
1013 | cmd->opcode = SRP_CMD; | |
1014 | cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); | |
d945e1df | 1015 | cmd->tag = req->index; |
aef9ec39 RD |
1016 | memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); |
1017 | ||
aef9ec39 RD |
1018 | req->scmnd = scmnd; |
1019 | req->cmd = iu; | |
1020 | req->cmd_done = 0; | |
1021 | req->tsk_mgmt = NULL; | |
1022 | ||
1023 | len = srp_map_data(scmnd, target, req); | |
1024 | if (len < 0) { | |
1025 | printk(KERN_ERR PFX "Failed to map data\n"); | |
1026 | goto err; | |
1027 | } | |
1028 | ||
1029 | if (__srp_post_recv(target)) { | |
1030 | printk(KERN_ERR PFX "Recv failed\n"); | |
1031 | goto err_unmap; | |
1032 | } | |
1033 | ||
85507bcc RC |
1034 | ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len, |
1035 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1036 | |
1037 | if (__srp_post_send(target, iu, len)) { | |
1038 | printk(KERN_ERR PFX "Send failed\n"); | |
1039 | goto err_unmap; | |
1040 | } | |
1041 | ||
d945e1df | 1042 | list_move_tail(&req->list, &target->req_queue); |
aef9ec39 RD |
1043 | |
1044 | return 0; | |
1045 | ||
1046 | err_unmap: | |
1047 | srp_unmap_data(scmnd, target, req); | |
1048 | ||
1049 | err: | |
1050 | return SCSI_MLQUEUE_HOST_BUSY; | |
1051 | } | |
1052 | ||
1053 | static int srp_alloc_iu_bufs(struct srp_target_port *target) | |
1054 | { | |
1055 | int i; | |
1056 | ||
1057 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1058 | target->rx_ring[i] = srp_alloc_iu(target->srp_host, | |
1059 | target->max_ti_iu_len, | |
1060 | GFP_KERNEL, DMA_FROM_DEVICE); | |
1061 | if (!target->rx_ring[i]) | |
1062 | goto err; | |
1063 | } | |
1064 | ||
1065 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1066 | target->tx_ring[i] = srp_alloc_iu(target->srp_host, | |
74b0a15b | 1067 | srp_max_iu_len, |
aef9ec39 RD |
1068 | GFP_KERNEL, DMA_TO_DEVICE); |
1069 | if (!target->tx_ring[i]) | |
1070 | goto err; | |
1071 | } | |
1072 | ||
1073 | return 0; | |
1074 | ||
1075 | err: | |
1076 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1077 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
1078 | target->rx_ring[i] = NULL; | |
1079 | } | |
1080 | ||
1081 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1082 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
1083 | target->tx_ring[i] = NULL; | |
1084 | } | |
1085 | ||
1086 | return -ENOMEM; | |
1087 | } | |
1088 | ||
1089 | static void srp_cm_rej_handler(struct ib_cm_id *cm_id, | |
1090 | struct ib_cm_event *event, | |
1091 | struct srp_target_port *target) | |
1092 | { | |
1093 | struct ib_class_port_info *cpi; | |
1094 | int opcode; | |
1095 | ||
1096 | switch (event->param.rej_rcvd.reason) { | |
1097 | case IB_CM_REJ_PORT_CM_REDIRECT: | |
1098 | cpi = event->param.rej_rcvd.ari; | |
1099 | target->path.dlid = cpi->redirect_lid; | |
1100 | target->path.pkey = cpi->redirect_pkey; | |
1101 | cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; | |
1102 | memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); | |
1103 | ||
1104 | target->status = target->path.dlid ? | |
1105 | SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; | |
1106 | break; | |
1107 | ||
1108 | case IB_CM_REJ_PORT_REDIRECT: | |
5d7cbfd6 | 1109 | if (srp_target_is_topspin(target)) { |
aef9ec39 RD |
1110 | /* |
1111 | * Topspin/Cisco SRP gateways incorrectly send | |
1112 | * reject reason code 25 when they mean 24 | |
1113 | * (port redirect). | |
1114 | */ | |
1115 | memcpy(target->path.dgid.raw, | |
1116 | event->param.rej_rcvd.ari, 16); | |
1117 | ||
1118 | printk(KERN_DEBUG PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", | |
1119 | (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), | |
1120 | (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); | |
1121 | ||
1122 | target->status = SRP_PORT_REDIRECT; | |
1123 | } else { | |
1124 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); | |
1125 | target->status = -ECONNRESET; | |
1126 | } | |
1127 | break; | |
1128 | ||
1129 | case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: | |
1130 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); | |
1131 | target->status = -ECONNRESET; | |
1132 | break; | |
1133 | ||
1134 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1135 | opcode = *(u8 *) event->private_data; | |
1136 | if (opcode == SRP_LOGIN_REJ) { | |
1137 | struct srp_login_rej *rej = event->private_data; | |
1138 | u32 reason = be32_to_cpu(rej->reason); | |
1139 | ||
1140 | if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) | |
1141 | printk(KERN_WARNING PFX | |
1142 | "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); | |
1143 | else | |
1144 | printk(KERN_WARNING PFX | |
1145 | "SRP LOGIN REJECTED, reason 0x%08x\n", reason); | |
1146 | } else | |
1147 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," | |
1148 | " opcode 0x%02x\n", opcode); | |
1149 | target->status = -ECONNRESET; | |
1150 | break; | |
1151 | ||
1152 | default: | |
1153 | printk(KERN_WARNING " REJ reason 0x%x\n", | |
1154 | event->param.rej_rcvd.reason); | |
1155 | target->status = -ECONNRESET; | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
1160 | { | |
1161 | struct srp_target_port *target = cm_id->context; | |
1162 | struct ib_qp_attr *qp_attr = NULL; | |
1163 | int attr_mask = 0; | |
1164 | int comp = 0; | |
1165 | int opcode = 0; | |
1166 | ||
1167 | switch (event->event) { | |
1168 | case IB_CM_REQ_ERROR: | |
1169 | printk(KERN_DEBUG PFX "Sending CM REQ failed\n"); | |
1170 | comp = 1; | |
1171 | target->status = -ECONNRESET; | |
1172 | break; | |
1173 | ||
1174 | case IB_CM_REP_RECEIVED: | |
1175 | comp = 1; | |
1176 | opcode = *(u8 *) event->private_data; | |
1177 | ||
1178 | if (opcode == SRP_LOGIN_RSP) { | |
1179 | struct srp_login_rsp *rsp = event->private_data; | |
1180 | ||
1181 | target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); | |
1182 | target->req_lim = be32_to_cpu(rsp->req_lim_delta); | |
1183 | ||
1184 | target->scsi_host->can_queue = min(target->req_lim, | |
1185 | target->scsi_host->can_queue); | |
1186 | } else { | |
1187 | printk(KERN_WARNING PFX "Unhandled RSP opcode %#x\n", opcode); | |
1188 | target->status = -ECONNRESET; | |
1189 | break; | |
1190 | } | |
1191 | ||
d2fcea7d VP |
1192 | if (!target->rx_ring[0]) { |
1193 | target->status = srp_alloc_iu_bufs(target); | |
1194 | if (target->status) | |
1195 | break; | |
1196 | } | |
aef9ec39 RD |
1197 | |
1198 | qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); | |
1199 | if (!qp_attr) { | |
1200 | target->status = -ENOMEM; | |
1201 | break; | |
1202 | } | |
1203 | ||
1204 | qp_attr->qp_state = IB_QPS_RTR; | |
1205 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1206 | if (target->status) | |
1207 | break; | |
1208 | ||
1209 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1210 | if (target->status) | |
1211 | break; | |
1212 | ||
1213 | target->status = srp_post_recv(target); | |
1214 | if (target->status) | |
1215 | break; | |
1216 | ||
1217 | qp_attr->qp_state = IB_QPS_RTS; | |
1218 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1219 | if (target->status) | |
1220 | break; | |
1221 | ||
1222 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1223 | if (target->status) | |
1224 | break; | |
1225 | ||
1226 | target->status = ib_send_cm_rtu(cm_id, NULL, 0); | |
1227 | if (target->status) | |
1228 | break; | |
1229 | ||
1230 | break; | |
1231 | ||
1232 | case IB_CM_REJ_RECEIVED: | |
1233 | printk(KERN_DEBUG PFX "REJ received\n"); | |
1234 | comp = 1; | |
1235 | ||
1236 | srp_cm_rej_handler(cm_id, event, target); | |
1237 | break; | |
1238 | ||
b7ac4ab4 IR |
1239 | case IB_CM_DREQ_RECEIVED: |
1240 | printk(KERN_WARNING PFX "DREQ received - connection closed\n"); | |
1241 | if (ib_send_cm_drep(cm_id, NULL, 0)) | |
1242 | printk(KERN_ERR PFX "Sending CM DREP failed\n"); | |
aef9ec39 RD |
1243 | break; |
1244 | ||
1245 | case IB_CM_TIMEWAIT_EXIT: | |
1246 | printk(KERN_ERR PFX "connection closed\n"); | |
1247 | ||
1248 | comp = 1; | |
1249 | target->status = 0; | |
1250 | break; | |
1251 | ||
b7ac4ab4 IR |
1252 | case IB_CM_MRA_RECEIVED: |
1253 | case IB_CM_DREQ_ERROR: | |
1254 | case IB_CM_DREP_RECEIVED: | |
1255 | break; | |
1256 | ||
aef9ec39 RD |
1257 | default: |
1258 | printk(KERN_WARNING PFX "Unhandled CM event %d\n", event->event); | |
1259 | break; | |
1260 | } | |
1261 | ||
1262 | if (comp) | |
1263 | complete(&target->done); | |
1264 | ||
1265 | kfree(qp_attr); | |
1266 | ||
1267 | return 0; | |
1268 | } | |
1269 | ||
d945e1df RD |
1270 | static int srp_send_tsk_mgmt(struct srp_target_port *target, |
1271 | struct srp_request *req, u8 func) | |
aef9ec39 | 1272 | { |
aef9ec39 RD |
1273 | struct srp_iu *iu; |
1274 | struct srp_tsk_mgmt *tsk_mgmt; | |
aef9ec39 RD |
1275 | |
1276 | spin_lock_irq(target->scsi_host->host_lock); | |
1277 | ||
1285b3a0 RD |
1278 | if (target->state == SRP_TARGET_DEAD || |
1279 | target->state == SRP_TARGET_REMOVED) { | |
d945e1df | 1280 | req->scmnd->result = DID_BAD_TARGET << 16; |
1285b3a0 RD |
1281 | goto out; |
1282 | } | |
1283 | ||
aef9ec39 RD |
1284 | init_completion(&req->done); |
1285 | ||
1286 | iu = __srp_get_tx_iu(target); | |
1287 | if (!iu) | |
1288 | goto out; | |
1289 | ||
1290 | tsk_mgmt = iu->buf; | |
1291 | memset(tsk_mgmt, 0, sizeof *tsk_mgmt); | |
1292 | ||
1293 | tsk_mgmt->opcode = SRP_TSK_MGMT; | |
d945e1df RD |
1294 | tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48); |
1295 | tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT; | |
aef9ec39 | 1296 | tsk_mgmt->tsk_mgmt_func = func; |
d945e1df | 1297 | tsk_mgmt->task_tag = req->index; |
aef9ec39 RD |
1298 | |
1299 | if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) | |
1300 | goto out; | |
1301 | ||
1302 | req->tsk_mgmt = iu; | |
1303 | ||
1304 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df | 1305 | |
aef9ec39 RD |
1306 | if (!wait_for_completion_timeout(&req->done, |
1307 | msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) | |
d945e1df | 1308 | return -1; |
aef9ec39 | 1309 | |
d945e1df | 1310 | return 0; |
aef9ec39 RD |
1311 | |
1312 | out: | |
1313 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df RD |
1314 | return -1; |
1315 | } | |
1316 | ||
1317 | static int srp_find_req(struct srp_target_port *target, | |
1318 | struct scsi_cmnd *scmnd, | |
1319 | struct srp_request **req) | |
1320 | { | |
1321 | if (scmnd->host_scribble == (void *) -1L) | |
1322 | return -1; | |
1323 | ||
1324 | *req = &target->req_ring[(long) scmnd->host_scribble]; | |
1325 | ||
1326 | return 0; | |
aef9ec39 RD |
1327 | } |
1328 | ||
1329 | static int srp_abort(struct scsi_cmnd *scmnd) | |
1330 | { | |
d945e1df RD |
1331 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1332 | struct srp_request *req; | |
1333 | int ret = SUCCESS; | |
1334 | ||
aef9ec39 RD |
1335 | printk(KERN_ERR "SRP abort called\n"); |
1336 | ||
1033ff67 IR |
1337 | if (target->qp_in_error) |
1338 | return FAILED; | |
d945e1df RD |
1339 | if (srp_find_req(target, scmnd, &req)) |
1340 | return FAILED; | |
1341 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK)) | |
1342 | return FAILED; | |
1343 | ||
1344 | spin_lock_irq(target->scsi_host->host_lock); | |
1345 | ||
1346 | if (req->cmd_done) { | |
1347 | srp_remove_req(target, req); | |
1348 | scmnd->scsi_done(scmnd); | |
1349 | } else if (!req->tsk_status) { | |
1350 | srp_remove_req(target, req); | |
1351 | scmnd->result = DID_ABORT << 16; | |
1352 | } else | |
1353 | ret = FAILED; | |
1354 | ||
1355 | spin_unlock_irq(target->scsi_host->host_lock); | |
1356 | ||
1357 | return ret; | |
aef9ec39 RD |
1358 | } |
1359 | ||
1360 | static int srp_reset_device(struct scsi_cmnd *scmnd) | |
1361 | { | |
d945e1df RD |
1362 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1363 | struct srp_request *req, *tmp; | |
1364 | ||
aef9ec39 RD |
1365 | printk(KERN_ERR "SRP reset_device called\n"); |
1366 | ||
1033ff67 IR |
1367 | if (target->qp_in_error) |
1368 | return FAILED; | |
d945e1df RD |
1369 | if (srp_find_req(target, scmnd, &req)) |
1370 | return FAILED; | |
1371 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET)) | |
1372 | return FAILED; | |
1373 | if (req->tsk_status) | |
1374 | return FAILED; | |
1375 | ||
1376 | spin_lock_irq(target->scsi_host->host_lock); | |
1377 | ||
1378 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) | |
526b4caa IR |
1379 | if (req->scmnd->device == scmnd->device) |
1380 | srp_reset_req(target, req); | |
d945e1df RD |
1381 | |
1382 | spin_unlock_irq(target->scsi_host->host_lock); | |
1383 | ||
1384 | return SUCCESS; | |
aef9ec39 RD |
1385 | } |
1386 | ||
1387 | static int srp_reset_host(struct scsi_cmnd *scmnd) | |
1388 | { | |
1389 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1390 | int ret = FAILED; | |
1391 | ||
1392 | printk(KERN_ERR PFX "SRP reset_host called\n"); | |
1393 | ||
1394 | if (!srp_reconnect_target(target)) | |
1395 | ret = SUCCESS; | |
1396 | ||
1397 | return ret; | |
1398 | } | |
1399 | ||
6ecb0c84 RD |
1400 | static ssize_t show_id_ext(struct class_device *cdev, char *buf) |
1401 | { | |
1402 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1403 | ||
1404 | if (target->state == SRP_TARGET_DEAD || | |
1405 | target->state == SRP_TARGET_REMOVED) | |
1406 | return -ENODEV; | |
1407 | ||
1408 | return sprintf(buf, "0x%016llx\n", | |
1409 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1410 | } | |
1411 | ||
1412 | static ssize_t show_ioc_guid(struct class_device *cdev, char *buf) | |
1413 | { | |
1414 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1415 | ||
1416 | if (target->state == SRP_TARGET_DEAD || | |
1417 | target->state == SRP_TARGET_REMOVED) | |
1418 | return -ENODEV; | |
1419 | ||
1420 | return sprintf(buf, "0x%016llx\n", | |
1421 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
1422 | } | |
1423 | ||
1424 | static ssize_t show_service_id(struct class_device *cdev, char *buf) | |
1425 | { | |
1426 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1427 | ||
1428 | if (target->state == SRP_TARGET_DEAD || | |
1429 | target->state == SRP_TARGET_REMOVED) | |
1430 | return -ENODEV; | |
1431 | ||
1432 | return sprintf(buf, "0x%016llx\n", | |
1433 | (unsigned long long) be64_to_cpu(target->service_id)); | |
1434 | } | |
1435 | ||
1436 | static ssize_t show_pkey(struct class_device *cdev, char *buf) | |
1437 | { | |
1438 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1439 | ||
1440 | if (target->state == SRP_TARGET_DEAD || | |
1441 | target->state == SRP_TARGET_REMOVED) | |
1442 | return -ENODEV; | |
1443 | ||
1444 | return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); | |
1445 | } | |
1446 | ||
1447 | static ssize_t show_dgid(struct class_device *cdev, char *buf) | |
1448 | { | |
1449 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1450 | ||
1451 | if (target->state == SRP_TARGET_DEAD || | |
1452 | target->state == SRP_TARGET_REMOVED) | |
1453 | return -ENODEV; | |
1454 | ||
1455 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1456 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]), | |
1457 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]), | |
1458 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]), | |
1459 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]), | |
1460 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]), | |
1461 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]), | |
1462 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]), | |
1463 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[7])); | |
1464 | } | |
1465 | ||
3633b3d0 IR |
1466 | static ssize_t show_orig_dgid(struct class_device *cdev, char *buf) |
1467 | { | |
1468 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1469 | ||
1470 | if (target->state == SRP_TARGET_DEAD || | |
1471 | target->state == SRP_TARGET_REMOVED) | |
1472 | return -ENODEV; | |
1473 | ||
1474 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1475 | be16_to_cpu(target->orig_dgid[0]), | |
1476 | be16_to_cpu(target->orig_dgid[1]), | |
1477 | be16_to_cpu(target->orig_dgid[2]), | |
1478 | be16_to_cpu(target->orig_dgid[3]), | |
1479 | be16_to_cpu(target->orig_dgid[4]), | |
1480 | be16_to_cpu(target->orig_dgid[5]), | |
1481 | be16_to_cpu(target->orig_dgid[6]), | |
1482 | be16_to_cpu(target->orig_dgid[7])); | |
1483 | } | |
1484 | ||
6bfa24fa RD |
1485 | static ssize_t show_zero_req_lim(struct class_device *cdev, char *buf) |
1486 | { | |
1487 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1488 | ||
1489 | if (target->state == SRP_TARGET_DEAD || | |
1490 | target->state == SRP_TARGET_REMOVED) | |
1491 | return -ENODEV; | |
1492 | ||
1493 | return sprintf(buf, "%d\n", target->zero_req_lim); | |
1494 | } | |
1495 | ||
ded7f1a1 IR |
1496 | static ssize_t show_local_ib_port(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, "%d\n", target->srp_host->port); | |
1501 | } | |
1502 | ||
1503 | static ssize_t show_local_ib_device(struct class_device *cdev, char *buf) | |
1504 | { | |
1505 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1506 | ||
1507 | return sprintf(buf, "%s\n", target->srp_host->dev->dev->name); | |
1508 | } | |
1509 | ||
1510 | static CLASS_DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); | |
1511 | static CLASS_DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); | |
1512 | static CLASS_DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); | |
1513 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
1514 | static CLASS_DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); | |
3633b3d0 | 1515 | static CLASS_DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL); |
ded7f1a1 IR |
1516 | static CLASS_DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); |
1517 | static CLASS_DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL); | |
1518 | static CLASS_DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL); | |
6ecb0c84 RD |
1519 | |
1520 | static struct class_device_attribute *srp_host_attrs[] = { | |
1521 | &class_device_attr_id_ext, | |
1522 | &class_device_attr_ioc_guid, | |
1523 | &class_device_attr_service_id, | |
1524 | &class_device_attr_pkey, | |
1525 | &class_device_attr_dgid, | |
3633b3d0 | 1526 | &class_device_attr_orig_dgid, |
6bfa24fa | 1527 | &class_device_attr_zero_req_lim, |
ded7f1a1 IR |
1528 | &class_device_attr_local_ib_port, |
1529 | &class_device_attr_local_ib_device, | |
6ecb0c84 RD |
1530 | NULL |
1531 | }; | |
1532 | ||
aef9ec39 RD |
1533 | static struct scsi_host_template srp_template = { |
1534 | .module = THIS_MODULE, | |
b7f008fd RD |
1535 | .name = "InfiniBand SRP initiator", |
1536 | .proc_name = DRV_NAME, | |
aef9ec39 RD |
1537 | .info = srp_target_info, |
1538 | .queuecommand = srp_queuecommand, | |
1539 | .eh_abort_handler = srp_abort, | |
1540 | .eh_device_reset_handler = srp_reset_device, | |
1541 | .eh_host_reset_handler = srp_reset_host, | |
1542 | .can_queue = SRP_SQ_SIZE, | |
1543 | .this_id = -1, | |
aef9ec39 | 1544 | .cmd_per_lun = SRP_SQ_SIZE, |
6ecb0c84 RD |
1545 | .use_clustering = ENABLE_CLUSTERING, |
1546 | .shost_attrs = srp_host_attrs | |
aef9ec39 RD |
1547 | }; |
1548 | ||
1549 | static int srp_add_target(struct srp_host *host, struct srp_target_port *target) | |
1550 | { | |
3236822b FT |
1551 | struct srp_rport_identifiers ids; |
1552 | struct srp_rport *rport; | |
1553 | ||
aef9ec39 RD |
1554 | sprintf(target->target_name, "SRP.T10:%016llX", |
1555 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1556 | ||
f5358a17 | 1557 | if (scsi_add_host(target->scsi_host, host->dev->dev->dma_device)) |
aef9ec39 RD |
1558 | return -ENODEV; |
1559 | ||
3236822b FT |
1560 | memcpy(ids.port_id, &target->id_ext, 8); |
1561 | memcpy(ids.port_id + 8, &target->ioc_guid, 8); | |
aebd5e47 | 1562 | ids.roles = SRP_RPORT_ROLE_TARGET; |
3236822b FT |
1563 | rport = srp_rport_add(target->scsi_host, &ids); |
1564 | if (IS_ERR(rport)) { | |
1565 | scsi_remove_host(target->scsi_host); | |
1566 | return PTR_ERR(rport); | |
1567 | } | |
1568 | ||
b3589fd4 | 1569 | spin_lock(&host->target_lock); |
aef9ec39 | 1570 | list_add_tail(&target->list, &host->target_list); |
b3589fd4 | 1571 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1572 | |
1573 | target->state = SRP_TARGET_LIVE; | |
1574 | ||
aef9ec39 | 1575 | scsi_scan_target(&target->scsi_host->shost_gendev, |
1962a4a1 | 1576 | 0, target->scsi_id, SCAN_WILD_CARD, 0); |
aef9ec39 RD |
1577 | |
1578 | return 0; | |
1579 | } | |
1580 | ||
1581 | static void srp_release_class_dev(struct class_device *class_dev) | |
1582 | { | |
1583 | struct srp_host *host = | |
1584 | container_of(class_dev, struct srp_host, class_dev); | |
1585 | ||
1586 | complete(&host->released); | |
1587 | } | |
1588 | ||
1589 | static struct class srp_class = { | |
1590 | .name = "infiniband_srp", | |
1591 | .release = srp_release_class_dev | |
1592 | }; | |
1593 | ||
1594 | /* | |
1595 | * Target ports are added by writing | |
1596 | * | |
1597 | * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, | |
1598 | * pkey=<P_Key>,service_id=<service ID> | |
1599 | * | |
1600 | * to the add_target sysfs attribute. | |
1601 | */ | |
1602 | enum { | |
1603 | SRP_OPT_ERR = 0, | |
1604 | SRP_OPT_ID_EXT = 1 << 0, | |
1605 | SRP_OPT_IOC_GUID = 1 << 1, | |
1606 | SRP_OPT_DGID = 1 << 2, | |
1607 | SRP_OPT_PKEY = 1 << 3, | |
1608 | SRP_OPT_SERVICE_ID = 1 << 4, | |
1609 | SRP_OPT_MAX_SECT = 1 << 5, | |
52fb2b50 | 1610 | SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, |
0c0450db | 1611 | SRP_OPT_IO_CLASS = 1 << 7, |
01cb9bcb | 1612 | SRP_OPT_INITIATOR_EXT = 1 << 8, |
aef9ec39 RD |
1613 | SRP_OPT_ALL = (SRP_OPT_ID_EXT | |
1614 | SRP_OPT_IOC_GUID | | |
1615 | SRP_OPT_DGID | | |
1616 | SRP_OPT_PKEY | | |
1617 | SRP_OPT_SERVICE_ID), | |
1618 | }; | |
1619 | ||
1620 | static match_table_t srp_opt_tokens = { | |
52fb2b50 VP |
1621 | { SRP_OPT_ID_EXT, "id_ext=%s" }, |
1622 | { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, | |
1623 | { SRP_OPT_DGID, "dgid=%s" }, | |
1624 | { SRP_OPT_PKEY, "pkey=%x" }, | |
1625 | { SRP_OPT_SERVICE_ID, "service_id=%s" }, | |
1626 | { SRP_OPT_MAX_SECT, "max_sect=%d" }, | |
1627 | { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, | |
0c0450db | 1628 | { SRP_OPT_IO_CLASS, "io_class=%x" }, |
01cb9bcb | 1629 | { SRP_OPT_INITIATOR_EXT, "initiator_ext=%s" }, |
52fb2b50 | 1630 | { SRP_OPT_ERR, NULL } |
aef9ec39 RD |
1631 | }; |
1632 | ||
1633 | static int srp_parse_options(const char *buf, struct srp_target_port *target) | |
1634 | { | |
1635 | char *options, *sep_opt; | |
1636 | char *p; | |
1637 | char dgid[3]; | |
1638 | substring_t args[MAX_OPT_ARGS]; | |
1639 | int opt_mask = 0; | |
1640 | int token; | |
1641 | int ret = -EINVAL; | |
1642 | int i; | |
1643 | ||
1644 | options = kstrdup(buf, GFP_KERNEL); | |
1645 | if (!options) | |
1646 | return -ENOMEM; | |
1647 | ||
1648 | sep_opt = options; | |
1649 | while ((p = strsep(&sep_opt, ",")) != NULL) { | |
1650 | if (!*p) | |
1651 | continue; | |
1652 | ||
1653 | token = match_token(p, srp_opt_tokens, args); | |
1654 | opt_mask |= token; | |
1655 | ||
1656 | switch (token) { | |
1657 | case SRP_OPT_ID_EXT: | |
1658 | p = match_strdup(args); | |
a20f3a6d IR |
1659 | if (!p) { |
1660 | ret = -ENOMEM; | |
1661 | goto out; | |
1662 | } | |
aef9ec39 RD |
1663 | target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1664 | kfree(p); | |
1665 | break; | |
1666 | ||
1667 | case SRP_OPT_IOC_GUID: | |
1668 | p = match_strdup(args); | |
a20f3a6d IR |
1669 | if (!p) { |
1670 | ret = -ENOMEM; | |
1671 | goto out; | |
1672 | } | |
aef9ec39 RD |
1673 | target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1674 | kfree(p); | |
1675 | break; | |
1676 | ||
1677 | case SRP_OPT_DGID: | |
1678 | p = match_strdup(args); | |
a20f3a6d IR |
1679 | if (!p) { |
1680 | ret = -ENOMEM; | |
1681 | goto out; | |
1682 | } | |
aef9ec39 RD |
1683 | if (strlen(p) != 32) { |
1684 | printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); | |
ce1823f0 | 1685 | kfree(p); |
aef9ec39 RD |
1686 | goto out; |
1687 | } | |
1688 | ||
1689 | for (i = 0; i < 16; ++i) { | |
1690 | strlcpy(dgid, p + i * 2, 3); | |
1691 | target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); | |
1692 | } | |
bf17c1c7 | 1693 | kfree(p); |
3633b3d0 | 1694 | memcpy(target->orig_dgid, target->path.dgid.raw, 16); |
aef9ec39 RD |
1695 | break; |
1696 | ||
1697 | case SRP_OPT_PKEY: | |
1698 | if (match_hex(args, &token)) { | |
1699 | printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); | |
1700 | goto out; | |
1701 | } | |
1702 | target->path.pkey = cpu_to_be16(token); | |
1703 | break; | |
1704 | ||
1705 | case SRP_OPT_SERVICE_ID: | |
1706 | p = match_strdup(args); | |
a20f3a6d IR |
1707 | if (!p) { |
1708 | ret = -ENOMEM; | |
1709 | goto out; | |
1710 | } | |
aef9ec39 | 1711 | target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
247e020e | 1712 | target->path.service_id = target->service_id; |
aef9ec39 RD |
1713 | kfree(p); |
1714 | break; | |
1715 | ||
1716 | case SRP_OPT_MAX_SECT: | |
1717 | if (match_int(args, &token)) { | |
1718 | printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); | |
1719 | goto out; | |
1720 | } | |
1721 | target->scsi_host->max_sectors = token; | |
1722 | break; | |
1723 | ||
52fb2b50 VP |
1724 | case SRP_OPT_MAX_CMD_PER_LUN: |
1725 | if (match_int(args, &token)) { | |
1726 | printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); | |
1727 | goto out; | |
1728 | } | |
1729 | target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); | |
1730 | break; | |
1731 | ||
0c0450db R |
1732 | case SRP_OPT_IO_CLASS: |
1733 | if (match_hex(args, &token)) { | |
1734 | printk(KERN_WARNING PFX "bad IO class parameter '%s' \n", p); | |
1735 | goto out; | |
1736 | } | |
1737 | if (token != SRP_REV10_IB_IO_CLASS && | |
1738 | token != SRP_REV16A_IB_IO_CLASS) { | |
1739 | printk(KERN_WARNING PFX "unknown IO class parameter value" | |
1740 | " %x specified (use %x or %x).\n", | |
1741 | token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); | |
1742 | goto out; | |
1743 | } | |
1744 | target->io_class = token; | |
1745 | break; | |
1746 | ||
01cb9bcb IR |
1747 | case SRP_OPT_INITIATOR_EXT: |
1748 | p = match_strdup(args); | |
a20f3a6d IR |
1749 | if (!p) { |
1750 | ret = -ENOMEM; | |
1751 | goto out; | |
1752 | } | |
01cb9bcb IR |
1753 | target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1754 | kfree(p); | |
1755 | break; | |
1756 | ||
aef9ec39 RD |
1757 | default: |
1758 | printk(KERN_WARNING PFX "unknown parameter or missing value " | |
1759 | "'%s' in target creation request\n", p); | |
1760 | goto out; | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) | |
1765 | ret = 0; | |
1766 | else | |
1767 | for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) | |
1768 | if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && | |
1769 | !(srp_opt_tokens[i].token & opt_mask)) | |
1770 | printk(KERN_WARNING PFX "target creation request is " | |
1771 | "missing parameter '%s'\n", | |
1772 | srp_opt_tokens[i].pattern); | |
1773 | ||
1774 | out: | |
1775 | kfree(options); | |
1776 | return ret; | |
1777 | } | |
1778 | ||
1779 | static ssize_t srp_create_target(struct class_device *class_dev, | |
1780 | const char *buf, size_t count) | |
1781 | { | |
1782 | struct srp_host *host = | |
1783 | container_of(class_dev, struct srp_host, class_dev); | |
1784 | struct Scsi_Host *target_host; | |
1785 | struct srp_target_port *target; | |
1786 | int ret; | |
1787 | int i; | |
1788 | ||
1789 | target_host = scsi_host_alloc(&srp_template, | |
1790 | sizeof (struct srp_target_port)); | |
1791 | if (!target_host) | |
1792 | return -ENOMEM; | |
1793 | ||
3236822b | 1794 | target_host->transportt = ib_srp_transport_template; |
3c8edf0e AR |
1795 | target_host->max_lun = SRP_MAX_LUN; |
1796 | target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; | |
5f068992 | 1797 | |
aef9ec39 | 1798 | target = host_to_target(target_host); |
aef9ec39 | 1799 | |
0c0450db | 1800 | target->io_class = SRP_REV16A_IB_IO_CLASS; |
aef9ec39 RD |
1801 | target->scsi_host = target_host; |
1802 | target->srp_host = host; | |
1803 | ||
d945e1df | 1804 | INIT_LIST_HEAD(&target->free_reqs); |
aef9ec39 | 1805 | INIT_LIST_HEAD(&target->req_queue); |
d945e1df RD |
1806 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
1807 | target->req_ring[i].index = i; | |
1808 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
1809 | } | |
aef9ec39 RD |
1810 | |
1811 | ret = srp_parse_options(buf, target); | |
1812 | if (ret) | |
1813 | goto err; | |
1814 | ||
f5358a17 | 1815 | ib_get_cached_gid(host->dev->dev, host->port, 0, &target->path.sgid); |
aef9ec39 RD |
1816 | |
1817 | printk(KERN_DEBUG PFX "new target: id_ext %016llx ioc_guid %016llx pkey %04x " | |
1818 | "service_id %016llx dgid %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1819 | (unsigned long long) be64_to_cpu(target->id_ext), | |
1820 | (unsigned long long) be64_to_cpu(target->ioc_guid), | |
1821 | be16_to_cpu(target->path.pkey), | |
1822 | (unsigned long long) be64_to_cpu(target->service_id), | |
1823 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[0]), | |
1824 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[2]), | |
1825 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[4]), | |
1826 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[6]), | |
1827 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[8]), | |
1828 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[10]), | |
1829 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[12]), | |
1830 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[14])); | |
1831 | ||
1832 | ret = srp_create_target_ib(target); | |
1833 | if (ret) | |
1834 | goto err; | |
1835 | ||
f5358a17 | 1836 | target->cm_id = ib_create_cm_id(host->dev->dev, srp_cm_handler, target); |
aef9ec39 RD |
1837 | if (IS_ERR(target->cm_id)) { |
1838 | ret = PTR_ERR(target->cm_id); | |
1839 | goto err_free; | |
1840 | } | |
1841 | ||
1033ff67 | 1842 | target->qp_in_error = 0; |
aef9ec39 RD |
1843 | ret = srp_connect_target(target); |
1844 | if (ret) { | |
1845 | printk(KERN_ERR PFX "Connection failed\n"); | |
1846 | goto err_cm_id; | |
1847 | } | |
1848 | ||
1849 | ret = srp_add_target(host, target); | |
1850 | if (ret) | |
1851 | goto err_disconnect; | |
1852 | ||
1853 | return count; | |
1854 | ||
1855 | err_disconnect: | |
1856 | srp_disconnect_target(target); | |
1857 | ||
1858 | err_cm_id: | |
1859 | ib_destroy_cm_id(target->cm_id); | |
1860 | ||
1861 | err_free: | |
1862 | srp_free_target_ib(target); | |
1863 | ||
1864 | err: | |
1865 | scsi_host_put(target_host); | |
1866 | ||
1867 | return ret; | |
1868 | } | |
1869 | ||
1870 | static CLASS_DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); | |
1871 | ||
1872 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) | |
1873 | { | |
1874 | struct srp_host *host = | |
1875 | container_of(class_dev, struct srp_host, class_dev); | |
1876 | ||
f5358a17 | 1877 | return sprintf(buf, "%s\n", host->dev->dev->name); |
aef9ec39 RD |
1878 | } |
1879 | ||
1880 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
1881 | ||
1882 | static ssize_t show_port(struct class_device *class_dev, char *buf) | |
1883 | { | |
1884 | struct srp_host *host = | |
1885 | container_of(class_dev, struct srp_host, class_dev); | |
1886 | ||
1887 | return sprintf(buf, "%d\n", host->port); | |
1888 | } | |
1889 | ||
1890 | static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL); | |
1891 | ||
f5358a17 | 1892 | static struct srp_host *srp_add_port(struct srp_device *device, u8 port) |
aef9ec39 RD |
1893 | { |
1894 | struct srp_host *host; | |
1895 | ||
1896 | host = kzalloc(sizeof *host, GFP_KERNEL); | |
1897 | if (!host) | |
1898 | return NULL; | |
1899 | ||
1900 | INIT_LIST_HEAD(&host->target_list); | |
b3589fd4 | 1901 | spin_lock_init(&host->target_lock); |
aef9ec39 RD |
1902 | init_completion(&host->released); |
1903 | host->dev = device; | |
1904 | host->port = port; | |
1905 | ||
aef9ec39 | 1906 | host->class_dev.class = &srp_class; |
f5358a17 | 1907 | host->class_dev.dev = device->dev->dma_device; |
aef9ec39 | 1908 | snprintf(host->class_dev.class_id, BUS_ID_SIZE, "srp-%s-%d", |
f5358a17 | 1909 | device->dev->name, port); |
aef9ec39 RD |
1910 | |
1911 | if (class_device_register(&host->class_dev)) | |
f5358a17 | 1912 | goto free_host; |
aef9ec39 RD |
1913 | if (class_device_create_file(&host->class_dev, &class_device_attr_add_target)) |
1914 | goto err_class; | |
1915 | if (class_device_create_file(&host->class_dev, &class_device_attr_ibdev)) | |
1916 | goto err_class; | |
1917 | if (class_device_create_file(&host->class_dev, &class_device_attr_port)) | |
1918 | goto err_class; | |
1919 | ||
1920 | return host; | |
1921 | ||
1922 | err_class: | |
1923 | class_device_unregister(&host->class_dev); | |
1924 | ||
f5358a17 | 1925 | free_host: |
aef9ec39 RD |
1926 | kfree(host); |
1927 | ||
1928 | return NULL; | |
1929 | } | |
1930 | ||
1931 | static void srp_add_one(struct ib_device *device) | |
1932 | { | |
f5358a17 RD |
1933 | struct srp_device *srp_dev; |
1934 | struct ib_device_attr *dev_attr; | |
1935 | struct ib_fmr_pool_param fmr_param; | |
aef9ec39 | 1936 | struct srp_host *host; |
aef9ec39 RD |
1937 | int s, e, p; |
1938 | ||
f5358a17 RD |
1939 | dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); |
1940 | if (!dev_attr) | |
cf311cd4 | 1941 | return; |
aef9ec39 | 1942 | |
f5358a17 RD |
1943 | if (ib_query_device(device, dev_attr)) { |
1944 | printk(KERN_WARNING PFX "Query device failed for %s\n", | |
1945 | device->name); | |
1946 | goto free_attr; | |
1947 | } | |
1948 | ||
1949 | srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); | |
1950 | if (!srp_dev) | |
1951 | goto free_attr; | |
1952 | ||
1953 | /* | |
1954 | * Use the smallest page size supported by the HCA, down to a | |
1955 | * minimum of 512 bytes (which is the smallest sector that a | |
1956 | * SCSI command will ever carry). | |
1957 | */ | |
1958 | srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); | |
1959 | srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; | |
bf628dc2 | 1960 | srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1); |
f5358a17 RD |
1961 | |
1962 | INIT_LIST_HEAD(&srp_dev->dev_list); | |
1963 | ||
1964 | srp_dev->dev = device; | |
1965 | srp_dev->pd = ib_alloc_pd(device); | |
1966 | if (IS_ERR(srp_dev->pd)) | |
1967 | goto free_dev; | |
1968 | ||
1969 | srp_dev->mr = ib_get_dma_mr(srp_dev->pd, | |
1970 | IB_ACCESS_LOCAL_WRITE | | |
1971 | IB_ACCESS_REMOTE_READ | | |
1972 | IB_ACCESS_REMOTE_WRITE); | |
1973 | if (IS_ERR(srp_dev->mr)) | |
1974 | goto err_pd; | |
1975 | ||
1976 | memset(&fmr_param, 0, sizeof fmr_param); | |
1977 | fmr_param.pool_size = SRP_FMR_POOL_SIZE; | |
1978 | fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; | |
1979 | fmr_param.cache = 1; | |
1980 | fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; | |
1981 | fmr_param.page_shift = srp_dev->fmr_page_shift; | |
1982 | fmr_param.access = (IB_ACCESS_LOCAL_WRITE | | |
1983 | IB_ACCESS_REMOTE_WRITE | | |
1984 | IB_ACCESS_REMOTE_READ); | |
1985 | ||
1986 | srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); | |
1987 | if (IS_ERR(srp_dev->fmr_pool)) | |
1988 | srp_dev->fmr_pool = NULL; | |
aef9ec39 | 1989 | |
07ebafba | 1990 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
aef9ec39 RD |
1991 | s = 0; |
1992 | e = 0; | |
1993 | } else { | |
1994 | s = 1; | |
1995 | e = device->phys_port_cnt; | |
1996 | } | |
1997 | ||
1998 | for (p = s; p <= e; ++p) { | |
f5358a17 | 1999 | host = srp_add_port(srp_dev, p); |
aef9ec39 | 2000 | if (host) |
f5358a17 | 2001 | list_add_tail(&host->list, &srp_dev->dev_list); |
aef9ec39 RD |
2002 | } |
2003 | ||
f5358a17 RD |
2004 | ib_set_client_data(device, &srp_client, srp_dev); |
2005 | ||
2006 | goto free_attr; | |
2007 | ||
2008 | err_pd: | |
2009 | ib_dealloc_pd(srp_dev->pd); | |
2010 | ||
2011 | free_dev: | |
2012 | kfree(srp_dev); | |
2013 | ||
2014 | free_attr: | |
2015 | kfree(dev_attr); | |
aef9ec39 RD |
2016 | } |
2017 | ||
2018 | static void srp_remove_one(struct ib_device *device) | |
2019 | { | |
f5358a17 | 2020 | struct srp_device *srp_dev; |
aef9ec39 RD |
2021 | struct srp_host *host, *tmp_host; |
2022 | LIST_HEAD(target_list); | |
2023 | struct srp_target_port *target, *tmp_target; | |
aef9ec39 | 2024 | |
f5358a17 | 2025 | srp_dev = ib_get_client_data(device, &srp_client); |
aef9ec39 | 2026 | |
f5358a17 | 2027 | list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { |
aef9ec39 RD |
2028 | class_device_unregister(&host->class_dev); |
2029 | /* | |
2030 | * Wait for the sysfs entry to go away, so that no new | |
2031 | * target ports can be created. | |
2032 | */ | |
2033 | wait_for_completion(&host->released); | |
2034 | ||
2035 | /* | |
2036 | * Mark all target ports as removed, so we stop queueing | |
2037 | * commands and don't try to reconnect. | |
2038 | */ | |
b3589fd4 | 2039 | spin_lock(&host->target_lock); |
549c5fc2 | 2040 | list_for_each_entry(target, &host->target_list, list) { |
0c5b3952 IR |
2041 | spin_lock_irq(target->scsi_host->host_lock); |
2042 | target->state = SRP_TARGET_REMOVED; | |
2043 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 | 2044 | } |
b3589fd4 | 2045 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
2046 | |
2047 | /* | |
2048 | * Wait for any reconnection tasks that may have | |
2049 | * started before we marked our target ports as | |
2050 | * removed, and any target port removal tasks. | |
2051 | */ | |
2052 | flush_scheduled_work(); | |
2053 | ||
2054 | list_for_each_entry_safe(target, tmp_target, | |
2055 | &host->target_list, list) { | |
2056 | scsi_remove_host(target->scsi_host); | |
2057 | srp_disconnect_target(target); | |
2058 | ib_destroy_cm_id(target->cm_id); | |
2059 | srp_free_target_ib(target); | |
2060 | scsi_host_put(target->scsi_host); | |
2061 | } | |
2062 | ||
aef9ec39 RD |
2063 | kfree(host); |
2064 | } | |
2065 | ||
f5358a17 RD |
2066 | if (srp_dev->fmr_pool) |
2067 | ib_destroy_fmr_pool(srp_dev->fmr_pool); | |
2068 | ib_dereg_mr(srp_dev->mr); | |
2069 | ib_dealloc_pd(srp_dev->pd); | |
2070 | ||
2071 | kfree(srp_dev); | |
aef9ec39 RD |
2072 | } |
2073 | ||
3236822b FT |
2074 | static struct srp_function_template ib_srp_transport_functions = { |
2075 | }; | |
2076 | ||
aef9ec39 RD |
2077 | static int __init srp_init_module(void) |
2078 | { | |
2079 | int ret; | |
2080 | ||
3236822b FT |
2081 | ib_srp_transport_template = |
2082 | srp_attach_transport(&ib_srp_transport_functions); | |
2083 | if (!ib_srp_transport_template) | |
2084 | return -ENOMEM; | |
2085 | ||
74b0a15b VP |
2086 | srp_template.sg_tablesize = srp_sg_tablesize; |
2087 | srp_max_iu_len = (sizeof (struct srp_cmd) + | |
2088 | sizeof (struct srp_indirect_buf) + | |
2089 | srp_sg_tablesize * 16); | |
2090 | ||
aef9ec39 RD |
2091 | ret = class_register(&srp_class); |
2092 | if (ret) { | |
2093 | printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); | |
3236822b | 2094 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2095 | return ret; |
2096 | } | |
2097 | ||
c1a0b23b MT |
2098 | ib_sa_register_client(&srp_sa_client); |
2099 | ||
aef9ec39 RD |
2100 | ret = ib_register_client(&srp_client); |
2101 | if (ret) { | |
2102 | printk(KERN_ERR PFX "couldn't register IB client\n"); | |
3236822b | 2103 | srp_release_transport(ib_srp_transport_template); |
c1a0b23b | 2104 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 RD |
2105 | class_unregister(&srp_class); |
2106 | return ret; | |
2107 | } | |
2108 | ||
2109 | return 0; | |
2110 | } | |
2111 | ||
2112 | static void __exit srp_cleanup_module(void) | |
2113 | { | |
2114 | ib_unregister_client(&srp_client); | |
c1a0b23b | 2115 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 | 2116 | class_unregister(&srp_class); |
3236822b | 2117 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2118 | } |
2119 | ||
2120 | module_init(srp_init_module); | |
2121 | module_exit(srp_cleanup_module); |