]>
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> | |
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 | ||
79 | static const u8 topspin_oui[3] = { 0x00, 0x05, 0xad }; | |
80 | ||
559ce8f1 IR |
81 | static int mellanox_workarounds = 1; |
82 | ||
83 | module_param(mellanox_workarounds, int, 0444); | |
84 | MODULE_PARM_DESC(mellanox_workarounds, | |
85 | "Enable workarounds for Mellanox SRP target bugs if != 0"); | |
86 | ||
87 | static const u8 mellanox_oui[3] = { 0x00, 0x02, 0xc9 }; | |
88 | ||
aef9ec39 RD |
89 | static void srp_add_one(struct ib_device *device); |
90 | static void srp_remove_one(struct ib_device *device); | |
91 | static void srp_completion(struct ib_cq *cq, void *target_ptr); | |
92 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event); | |
93 | ||
3236822b FT |
94 | static struct scsi_transport_template *ib_srp_transport_template; |
95 | ||
aef9ec39 RD |
96 | static struct ib_client srp_client = { |
97 | .name = "srp", | |
98 | .add = srp_add_one, | |
99 | .remove = srp_remove_one | |
100 | }; | |
101 | ||
c1a0b23b MT |
102 | static struct ib_sa_client srp_sa_client; |
103 | ||
aef9ec39 RD |
104 | static inline struct srp_target_port *host_to_target(struct Scsi_Host *host) |
105 | { | |
106 | return (struct srp_target_port *) host->hostdata; | |
107 | } | |
108 | ||
109 | static const char *srp_target_info(struct Scsi_Host *host) | |
110 | { | |
111 | return host_to_target(host)->target_name; | |
112 | } | |
113 | ||
114 | static struct srp_iu *srp_alloc_iu(struct srp_host *host, size_t size, | |
115 | gfp_t gfp_mask, | |
116 | enum dma_data_direction direction) | |
117 | { | |
118 | struct srp_iu *iu; | |
119 | ||
120 | iu = kmalloc(sizeof *iu, gfp_mask); | |
121 | if (!iu) | |
122 | goto out; | |
123 | ||
124 | iu->buf = kzalloc(size, gfp_mask); | |
125 | if (!iu->buf) | |
126 | goto out_free_iu; | |
127 | ||
85507bcc RC |
128 | iu->dma = ib_dma_map_single(host->dev->dev, iu->buf, size, direction); |
129 | if (ib_dma_mapping_error(host->dev->dev, iu->dma)) | |
aef9ec39 RD |
130 | goto out_free_buf; |
131 | ||
132 | iu->size = size; | |
133 | iu->direction = direction; | |
134 | ||
135 | return iu; | |
136 | ||
137 | out_free_buf: | |
138 | kfree(iu->buf); | |
139 | out_free_iu: | |
140 | kfree(iu); | |
141 | out: | |
142 | return NULL; | |
143 | } | |
144 | ||
145 | static void srp_free_iu(struct srp_host *host, struct srp_iu *iu) | |
146 | { | |
147 | if (!iu) | |
148 | return; | |
149 | ||
85507bcc | 150 | ib_dma_unmap_single(host->dev->dev, iu->dma, iu->size, iu->direction); |
aef9ec39 RD |
151 | kfree(iu->buf); |
152 | kfree(iu); | |
153 | } | |
154 | ||
155 | static void srp_qp_event(struct ib_event *event, void *context) | |
156 | { | |
157 | printk(KERN_ERR PFX "QP event %d\n", event->event); | |
158 | } | |
159 | ||
160 | static int srp_init_qp(struct srp_target_port *target, | |
161 | struct ib_qp *qp) | |
162 | { | |
163 | struct ib_qp_attr *attr; | |
164 | int ret; | |
165 | ||
166 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
167 | if (!attr) | |
168 | return -ENOMEM; | |
169 | ||
f5358a17 | 170 | ret = ib_find_cached_pkey(target->srp_host->dev->dev, |
aef9ec39 RD |
171 | target->srp_host->port, |
172 | be16_to_cpu(target->path.pkey), | |
173 | &attr->pkey_index); | |
174 | if (ret) | |
175 | goto out; | |
176 | ||
177 | attr->qp_state = IB_QPS_INIT; | |
178 | attr->qp_access_flags = (IB_ACCESS_REMOTE_READ | | |
179 | IB_ACCESS_REMOTE_WRITE); | |
180 | attr->port_num = target->srp_host->port; | |
181 | ||
182 | ret = ib_modify_qp(qp, attr, | |
183 | IB_QP_STATE | | |
184 | IB_QP_PKEY_INDEX | | |
185 | IB_QP_ACCESS_FLAGS | | |
186 | IB_QP_PORT); | |
187 | ||
188 | out: | |
189 | kfree(attr); | |
190 | return ret; | |
191 | } | |
192 | ||
193 | static int srp_create_target_ib(struct srp_target_port *target) | |
194 | { | |
195 | struct ib_qp_init_attr *init_attr; | |
196 | int ret; | |
197 | ||
198 | init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); | |
199 | if (!init_attr) | |
200 | return -ENOMEM; | |
201 | ||
f5358a17 | 202 | target->cq = ib_create_cq(target->srp_host->dev->dev, srp_completion, |
f4fd0b22 | 203 | NULL, target, SRP_CQ_SIZE, 0); |
aef9ec39 RD |
204 | if (IS_ERR(target->cq)) { |
205 | ret = PTR_ERR(target->cq); | |
206 | goto out; | |
207 | } | |
208 | ||
209 | ib_req_notify_cq(target->cq, IB_CQ_NEXT_COMP); | |
210 | ||
211 | init_attr->event_handler = srp_qp_event; | |
212 | init_attr->cap.max_send_wr = SRP_SQ_SIZE; | |
213 | init_attr->cap.max_recv_wr = SRP_RQ_SIZE; | |
214 | init_attr->cap.max_recv_sge = 1; | |
215 | init_attr->cap.max_send_sge = 1; | |
216 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
217 | init_attr->qp_type = IB_QPT_RC; | |
218 | init_attr->send_cq = target->cq; | |
219 | init_attr->recv_cq = target->cq; | |
220 | ||
f5358a17 | 221 | target->qp = ib_create_qp(target->srp_host->dev->pd, init_attr); |
aef9ec39 RD |
222 | if (IS_ERR(target->qp)) { |
223 | ret = PTR_ERR(target->qp); | |
224 | ib_destroy_cq(target->cq); | |
225 | goto out; | |
226 | } | |
227 | ||
228 | ret = srp_init_qp(target, target->qp); | |
229 | if (ret) { | |
230 | ib_destroy_qp(target->qp); | |
231 | ib_destroy_cq(target->cq); | |
232 | goto out; | |
233 | } | |
234 | ||
235 | out: | |
236 | kfree(init_attr); | |
237 | return ret; | |
238 | } | |
239 | ||
240 | static void srp_free_target_ib(struct srp_target_port *target) | |
241 | { | |
242 | int i; | |
243 | ||
244 | ib_destroy_qp(target->qp); | |
245 | ib_destroy_cq(target->cq); | |
246 | ||
247 | for (i = 0; i < SRP_RQ_SIZE; ++i) | |
248 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
249 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) | |
250 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
251 | } | |
252 | ||
253 | static void srp_path_rec_completion(int status, | |
254 | struct ib_sa_path_rec *pathrec, | |
255 | void *target_ptr) | |
256 | { | |
257 | struct srp_target_port *target = target_ptr; | |
258 | ||
259 | target->status = status; | |
260 | if (status) | |
261 | printk(KERN_ERR PFX "Got failed path rec status %d\n", status); | |
262 | else | |
263 | target->path = *pathrec; | |
264 | complete(&target->done); | |
265 | } | |
266 | ||
267 | static int srp_lookup_path(struct srp_target_port *target) | |
268 | { | |
269 | target->path.numb_path = 1; | |
270 | ||
271 | init_completion(&target->done); | |
272 | ||
c1a0b23b MT |
273 | target->path_query_id = ib_sa_path_rec_get(&srp_sa_client, |
274 | target->srp_host->dev->dev, | |
aef9ec39 RD |
275 | target->srp_host->port, |
276 | &target->path, | |
277 | IB_SA_PATH_REC_DGID | | |
278 | IB_SA_PATH_REC_SGID | | |
279 | IB_SA_PATH_REC_NUMB_PATH | | |
280 | IB_SA_PATH_REC_PKEY, | |
281 | SRP_PATH_REC_TIMEOUT_MS, | |
282 | GFP_KERNEL, | |
283 | srp_path_rec_completion, | |
284 | target, &target->path_query); | |
285 | if (target->path_query_id < 0) | |
286 | return target->path_query_id; | |
287 | ||
288 | wait_for_completion(&target->done); | |
289 | ||
290 | if (target->status < 0) | |
291 | printk(KERN_WARNING PFX "Path record query failed\n"); | |
292 | ||
293 | return target->status; | |
294 | } | |
295 | ||
296 | static int srp_send_req(struct srp_target_port *target) | |
297 | { | |
298 | struct { | |
299 | struct ib_cm_req_param param; | |
300 | struct srp_login_req priv; | |
301 | } *req = NULL; | |
302 | int status; | |
303 | ||
304 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
305 | if (!req) | |
306 | return -ENOMEM; | |
307 | ||
308 | req->param.primary_path = &target->path; | |
309 | req->param.alternate_path = NULL; | |
310 | req->param.service_id = target->service_id; | |
311 | req->param.qp_num = target->qp->qp_num; | |
312 | req->param.qp_type = target->qp->qp_type; | |
313 | req->param.private_data = &req->priv; | |
314 | req->param.private_data_len = sizeof req->priv; | |
315 | req->param.flow_control = 1; | |
316 | ||
317 | get_random_bytes(&req->param.starting_psn, 4); | |
318 | req->param.starting_psn &= 0xffffff; | |
319 | ||
320 | /* | |
321 | * Pick some arbitrary defaults here; we could make these | |
322 | * module parameters if anyone cared about setting them. | |
323 | */ | |
324 | req->param.responder_resources = 4; | |
325 | req->param.remote_cm_response_timeout = 20; | |
326 | req->param.local_cm_response_timeout = 20; | |
327 | req->param.retry_count = 7; | |
328 | req->param.rnr_retry_count = 7; | |
329 | req->param.max_cm_retries = 15; | |
330 | ||
331 | req->priv.opcode = SRP_LOGIN_REQ; | |
332 | req->priv.tag = 0; | |
74b0a15b | 333 | req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); |
aef9ec39 RD |
334 | req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | |
335 | SRP_BUF_FORMAT_INDIRECT); | |
0c0450db | 336 | /* |
3cd96564 | 337 | * In the published SRP specification (draft rev. 16a), the |
0c0450db R |
338 | * port identifier format is 8 bytes of ID extension followed |
339 | * by 8 bytes of GUID. Older drafts put the two halves in the | |
340 | * opposite order, so that the GUID comes first. | |
341 | * | |
342 | * Targets conforming to these obsolete drafts can be | |
343 | * recognized by the I/O Class they report. | |
344 | */ | |
345 | if (target->io_class == SRP_REV10_IB_IO_CLASS) { | |
346 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb | 347 | &target->path.sgid.global.interface_id, 8); |
0c0450db | 348 | memcpy(req->priv.initiator_port_id + 8, |
01cb9bcb | 349 | &target->initiator_ext, 8); |
0c0450db R |
350 | memcpy(req->priv.target_port_id, &target->ioc_guid, 8); |
351 | memcpy(req->priv.target_port_id + 8, &target->id_ext, 8); | |
352 | } else { | |
353 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb IR |
354 | &target->initiator_ext, 8); |
355 | memcpy(req->priv.initiator_port_id + 8, | |
356 | &target->path.sgid.global.interface_id, 8); | |
0c0450db R |
357 | memcpy(req->priv.target_port_id, &target->id_ext, 8); |
358 | memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); | |
359 | } | |
360 | ||
aef9ec39 RD |
361 | /* |
362 | * Topspin/Cisco SRP targets will reject our login unless we | |
01cb9bcb IR |
363 | * zero out the first 8 bytes of our initiator port ID and set |
364 | * the second 8 bytes to the local node GUID. | |
aef9ec39 RD |
365 | */ |
366 | if (topspin_workarounds && !memcmp(&target->ioc_guid, topspin_oui, 3)) { | |
367 | printk(KERN_DEBUG PFX "Topspin/Cisco initiator port ID workaround " | |
368 | "activated for target GUID %016llx\n", | |
369 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
370 | memset(req->priv.initiator_port_id, 0, 8); | |
01cb9bcb IR |
371 | memcpy(req->priv.initiator_port_id + 8, |
372 | &target->srp_host->dev->dev->node_guid, 8); | |
aef9ec39 | 373 | } |
aef9ec39 RD |
374 | |
375 | status = ib_send_cm_req(target->cm_id, &req->param); | |
376 | ||
377 | kfree(req); | |
378 | ||
379 | return status; | |
380 | } | |
381 | ||
382 | static void srp_disconnect_target(struct srp_target_port *target) | |
383 | { | |
384 | /* XXX should send SRP_I_LOGOUT request */ | |
385 | ||
386 | init_completion(&target->done); | |
e6581056 RD |
387 | if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { |
388 | printk(KERN_DEBUG PFX "Sending CM DREQ failed\n"); | |
389 | return; | |
390 | } | |
aef9ec39 RD |
391 | wait_for_completion(&target->done); |
392 | } | |
393 | ||
c4028958 | 394 | static void srp_remove_work(struct work_struct *work) |
aef9ec39 | 395 | { |
c4028958 DH |
396 | struct srp_target_port *target = |
397 | container_of(work, struct srp_target_port, work); | |
aef9ec39 RD |
398 | |
399 | spin_lock_irq(target->scsi_host->host_lock); | |
400 | if (target->state != SRP_TARGET_DEAD) { | |
401 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 RD |
402 | return; |
403 | } | |
404 | target->state = SRP_TARGET_REMOVED; | |
405 | spin_unlock_irq(target->scsi_host->host_lock); | |
406 | ||
b3589fd4 | 407 | spin_lock(&target->srp_host->target_lock); |
aef9ec39 | 408 | list_del(&target->list); |
b3589fd4 | 409 | spin_unlock(&target->srp_host->target_lock); |
aef9ec39 | 410 | |
3236822b | 411 | srp_remove_host(target->scsi_host); |
aef9ec39 RD |
412 | scsi_remove_host(target->scsi_host); |
413 | ib_destroy_cm_id(target->cm_id); | |
414 | srp_free_target_ib(target); | |
415 | scsi_host_put(target->scsi_host); | |
aef9ec39 RD |
416 | } |
417 | ||
418 | static int srp_connect_target(struct srp_target_port *target) | |
419 | { | |
420 | int ret; | |
421 | ||
422 | ret = srp_lookup_path(target); | |
423 | if (ret) | |
424 | return ret; | |
425 | ||
426 | while (1) { | |
427 | init_completion(&target->done); | |
428 | ret = srp_send_req(target); | |
429 | if (ret) | |
430 | return ret; | |
431 | wait_for_completion(&target->done); | |
432 | ||
433 | /* | |
434 | * The CM event handling code will set status to | |
435 | * SRP_PORT_REDIRECT if we get a port redirect REJ | |
436 | * back, or SRP_DLID_REDIRECT if we get a lid/qp | |
437 | * redirect REJ back. | |
438 | */ | |
439 | switch (target->status) { | |
440 | case 0: | |
441 | return 0; | |
442 | ||
443 | case SRP_PORT_REDIRECT: | |
444 | ret = srp_lookup_path(target); | |
445 | if (ret) | |
446 | return ret; | |
447 | break; | |
448 | ||
449 | case SRP_DLID_REDIRECT: | |
450 | break; | |
451 | ||
452 | default: | |
453 | return target->status; | |
454 | } | |
455 | } | |
456 | } | |
457 | ||
d945e1df RD |
458 | static void srp_unmap_data(struct scsi_cmnd *scmnd, |
459 | struct srp_target_port *target, | |
460 | struct srp_request *req) | |
461 | { | |
bb350d1d | 462 | if (!scsi_sglist(scmnd) || |
d945e1df RD |
463 | (scmnd->sc_data_direction != DMA_TO_DEVICE && |
464 | scmnd->sc_data_direction != DMA_FROM_DEVICE)) | |
465 | return; | |
466 | ||
f5358a17 RD |
467 | if (req->fmr) { |
468 | ib_fmr_pool_unmap(req->fmr); | |
469 | req->fmr = NULL; | |
470 | } | |
471 | ||
bb350d1d FT |
472 | ib_dma_unmap_sg(target->srp_host->dev->dev, scsi_sglist(scmnd), |
473 | scsi_sg_count(scmnd), scmnd->sc_data_direction); | |
d945e1df RD |
474 | } |
475 | ||
526b4caa IR |
476 | static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) |
477 | { | |
478 | srp_unmap_data(req->scmnd, target, req); | |
479 | list_move_tail(&req->list, &target->free_reqs); | |
480 | } | |
481 | ||
482 | static void srp_reset_req(struct srp_target_port *target, struct srp_request *req) | |
483 | { | |
484 | req->scmnd->result = DID_RESET << 16; | |
485 | req->scmnd->scsi_done(req->scmnd); | |
486 | srp_remove_req(target, req); | |
487 | } | |
488 | ||
aef9ec39 RD |
489 | static int srp_reconnect_target(struct srp_target_port *target) |
490 | { | |
491 | struct ib_cm_id *new_cm_id; | |
492 | struct ib_qp_attr qp_attr; | |
526b4caa | 493 | struct srp_request *req, *tmp; |
aef9ec39 RD |
494 | struct ib_wc wc; |
495 | int ret; | |
aef9ec39 RD |
496 | |
497 | spin_lock_irq(target->scsi_host->host_lock); | |
498 | if (target->state != SRP_TARGET_LIVE) { | |
499 | spin_unlock_irq(target->scsi_host->host_lock); | |
500 | return -EAGAIN; | |
501 | } | |
502 | target->state = SRP_TARGET_CONNECTING; | |
503 | spin_unlock_irq(target->scsi_host->host_lock); | |
504 | ||
505 | srp_disconnect_target(target); | |
506 | /* | |
507 | * Now get a new local CM ID so that we avoid confusing the | |
508 | * target in case things are really fouled up. | |
509 | */ | |
f5358a17 | 510 | new_cm_id = ib_create_cm_id(target->srp_host->dev->dev, |
aef9ec39 RD |
511 | srp_cm_handler, target); |
512 | if (IS_ERR(new_cm_id)) { | |
513 | ret = PTR_ERR(new_cm_id); | |
514 | goto err; | |
515 | } | |
516 | ib_destroy_cm_id(target->cm_id); | |
517 | target->cm_id = new_cm_id; | |
518 | ||
519 | qp_attr.qp_state = IB_QPS_RESET; | |
520 | ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); | |
521 | if (ret) | |
522 | goto err; | |
523 | ||
524 | ret = srp_init_qp(target, target->qp); | |
525 | if (ret) | |
526 | goto err; | |
527 | ||
528 | while (ib_poll_cq(target->cq, 1, &wc) > 0) | |
529 | ; /* nothing */ | |
530 | ||
d916a8f1 | 531 | spin_lock_irq(target->scsi_host->host_lock); |
526b4caa IR |
532 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) |
533 | srp_reset_req(target, req); | |
d916a8f1 | 534 | spin_unlock_irq(target->scsi_host->host_lock); |
aef9ec39 RD |
535 | |
536 | target->rx_head = 0; | |
537 | target->tx_head = 0; | |
538 | target->tx_tail = 0; | |
aef9ec39 | 539 | |
1033ff67 | 540 | target->qp_in_error = 0; |
aef9ec39 RD |
541 | ret = srp_connect_target(target); |
542 | if (ret) | |
543 | goto err; | |
544 | ||
545 | spin_lock_irq(target->scsi_host->host_lock); | |
546 | if (target->state == SRP_TARGET_CONNECTING) { | |
547 | ret = 0; | |
548 | target->state = SRP_TARGET_LIVE; | |
549 | } else | |
550 | ret = -EAGAIN; | |
551 | spin_unlock_irq(target->scsi_host->host_lock); | |
552 | ||
553 | return ret; | |
554 | ||
555 | err: | |
556 | printk(KERN_ERR PFX "reconnect failed (%d), removing target port.\n", ret); | |
557 | ||
558 | /* | |
559 | * We couldn't reconnect, so kill our target port off. | |
560 | * However, we have to defer the real removal because we might | |
561 | * be in the context of the SCSI error handler now, which | |
562 | * would deadlock if we call scsi_remove_host(). | |
563 | */ | |
564 | spin_lock_irq(target->scsi_host->host_lock); | |
565 | if (target->state == SRP_TARGET_CONNECTING) { | |
566 | target->state = SRP_TARGET_DEAD; | |
c4028958 | 567 | INIT_WORK(&target->work, srp_remove_work); |
aef9ec39 RD |
568 | schedule_work(&target->work); |
569 | } | |
570 | spin_unlock_irq(target->scsi_host->host_lock); | |
571 | ||
572 | return ret; | |
573 | } | |
574 | ||
559ce8f1 | 575 | static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat, |
f5358a17 RD |
576 | int sg_cnt, struct srp_request *req, |
577 | struct srp_direct_buf *buf) | |
578 | { | |
579 | u64 io_addr = 0; | |
580 | u64 *dma_pages; | |
581 | u32 len; | |
582 | int page_cnt; | |
583 | int i, j; | |
584 | int ret; | |
559ce8f1 | 585 | struct srp_device *dev = target->srp_host->dev; |
85507bcc | 586 | struct ib_device *ibdev = dev->dev; |
bb350d1d | 587 | struct scatterlist *sg; |
f5358a17 RD |
588 | |
589 | if (!dev->fmr_pool) | |
590 | return -ENODEV; | |
591 | ||
85507bcc | 592 | if ((ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask) && |
559ce8f1 IR |
593 | mellanox_workarounds && !memcmp(&target->ioc_guid, mellanox_oui, 3)) |
594 | return -EINVAL; | |
595 | ||
f5358a17 | 596 | len = page_cnt = 0; |
bb350d1d FT |
597 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
598 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 599 | |
bb350d1d | 600 | if (ib_sg_dma_address(ibdev, sg) & ~dev->fmr_page_mask) { |
f5358a17 RD |
601 | if (i > 0) |
602 | return -EINVAL; | |
603 | else | |
604 | ++page_cnt; | |
605 | } | |
bb350d1d | 606 | if ((ib_sg_dma_address(ibdev, sg) + dma_len) & |
f5358a17 RD |
607 | ~dev->fmr_page_mask) { |
608 | if (i < sg_cnt - 1) | |
609 | return -EINVAL; | |
610 | else | |
611 | ++page_cnt; | |
612 | } | |
613 | ||
85507bcc | 614 | len += dma_len; |
f5358a17 RD |
615 | } |
616 | ||
617 | page_cnt += len >> dev->fmr_page_shift; | |
618 | if (page_cnt > SRP_FMR_SIZE) | |
619 | return -ENOMEM; | |
620 | ||
621 | dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); | |
622 | if (!dma_pages) | |
623 | return -ENOMEM; | |
624 | ||
625 | page_cnt = 0; | |
bb350d1d FT |
626 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
627 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc RC |
628 | |
629 | for (j = 0; j < dma_len; j += dev->fmr_page_size) | |
f5358a17 | 630 | dma_pages[page_cnt++] = |
bb350d1d | 631 | (ib_sg_dma_address(ibdev, sg) & |
85507bcc RC |
632 | dev->fmr_page_mask) + j; |
633 | } | |
f5358a17 RD |
634 | |
635 | req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, | |
adfaa888 | 636 | dma_pages, page_cnt, io_addr); |
f5358a17 RD |
637 | if (IS_ERR(req->fmr)) { |
638 | ret = PTR_ERR(req->fmr); | |
6583eb3d | 639 | req->fmr = NULL; |
f5358a17 RD |
640 | goto out; |
641 | } | |
642 | ||
85507bcc RC |
643 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) & |
644 | ~dev->fmr_page_mask); | |
f5358a17 RD |
645 | buf->key = cpu_to_be32(req->fmr->fmr->rkey); |
646 | buf->len = cpu_to_be32(len); | |
647 | ||
648 | ret = 0; | |
649 | ||
650 | out: | |
651 | kfree(dma_pages); | |
652 | ||
653 | return ret; | |
654 | } | |
655 | ||
aef9ec39 RD |
656 | static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, |
657 | struct srp_request *req) | |
658 | { | |
cf368713 | 659 | struct scatterlist *scat; |
aef9ec39 | 660 | struct srp_cmd *cmd = req->cmd->buf; |
cf368713 | 661 | int len, nents, count; |
f5358a17 | 662 | u8 fmt = SRP_DATA_DESC_DIRECT; |
85507bcc RC |
663 | struct srp_device *dev; |
664 | struct ib_device *ibdev; | |
aef9ec39 | 665 | |
bb350d1d | 666 | if (!scsi_sglist(scmnd) || scmnd->sc_data_direction == DMA_NONE) |
aef9ec39 RD |
667 | return sizeof (struct srp_cmd); |
668 | ||
669 | if (scmnd->sc_data_direction != DMA_FROM_DEVICE && | |
670 | scmnd->sc_data_direction != DMA_TO_DEVICE) { | |
671 | printk(KERN_WARNING PFX "Unhandled data direction %d\n", | |
672 | scmnd->sc_data_direction); | |
673 | return -EINVAL; | |
674 | } | |
675 | ||
bb350d1d FT |
676 | nents = scsi_sg_count(scmnd); |
677 | scat = scsi_sglist(scmnd); | |
aef9ec39 | 678 | |
85507bcc RC |
679 | dev = target->srp_host->dev; |
680 | ibdev = dev->dev; | |
681 | ||
682 | count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction); | |
f5358a17 RD |
683 | |
684 | fmt = SRP_DATA_DESC_DIRECT; | |
685 | len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); | |
aef9ec39 | 686 | |
cf368713 | 687 | if (count == 1) { |
f5358a17 RD |
688 | /* |
689 | * The midlayer only generated a single gather/scatter | |
690 | * entry, or DMA mapping coalesced everything to a | |
691 | * single entry. So a direct descriptor along with | |
692 | * the DMA MR suffices. | |
693 | */ | |
cf368713 | 694 | struct srp_direct_buf *buf = (void *) cmd->add_data; |
aef9ec39 | 695 | |
85507bcc RC |
696 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat)); |
697 | buf->key = cpu_to_be32(dev->mr->rkey); | |
698 | buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat)); | |
559ce8f1 | 699 | } else if (srp_map_fmr(target, scat, count, req, |
f5358a17 RD |
700 | (void *) cmd->add_data)) { |
701 | /* | |
702 | * FMR mapping failed, and the scatterlist has more | |
703 | * than one entry. Generate an indirect memory | |
704 | * descriptor. | |
705 | */ | |
cf368713 | 706 | struct srp_indirect_buf *buf = (void *) cmd->add_data; |
bb350d1d | 707 | struct scatterlist *sg; |
cf368713 | 708 | u32 datalen = 0; |
f5358a17 | 709 | int i; |
aef9ec39 | 710 | |
cf368713 | 711 | fmt = SRP_DATA_DESC_INDIRECT; |
f5358a17 RD |
712 | len = sizeof (struct srp_cmd) + |
713 | sizeof (struct srp_indirect_buf) + | |
714 | count * sizeof (struct srp_direct_buf); | |
715 | ||
bb350d1d FT |
716 | scsi_for_each_sg(scmnd, sg, count, i) { |
717 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 718 | |
f5358a17 | 719 | buf->desc_list[i].va = |
bb350d1d | 720 | cpu_to_be64(ib_sg_dma_address(ibdev, sg)); |
f5358a17 | 721 | buf->desc_list[i].key = |
85507bcc RC |
722 | cpu_to_be32(dev->mr->rkey); |
723 | buf->desc_list[i].len = cpu_to_be32(dma_len); | |
724 | datalen += dma_len; | |
f5358a17 | 725 | } |
aef9ec39 | 726 | |
cf368713 RD |
727 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) |
728 | cmd->data_out_desc_cnt = count; | |
729 | else | |
730 | cmd->data_in_desc_cnt = count; | |
731 | ||
f5358a17 RD |
732 | buf->table_desc.va = |
733 | cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); | |
cf368713 | 734 | buf->table_desc.key = |
f5358a17 | 735 | cpu_to_be32(target->srp_host->dev->mr->rkey); |
cf368713 RD |
736 | buf->table_desc.len = |
737 | cpu_to_be32(count * sizeof (struct srp_direct_buf)); | |
738 | ||
cf368713 | 739 | buf->len = cpu_to_be32(datalen); |
aef9ec39 RD |
740 | } |
741 | ||
742 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) | |
743 | cmd->buf_fmt = fmt << 4; | |
744 | else | |
745 | cmd->buf_fmt = fmt; | |
746 | ||
aef9ec39 RD |
747 | return len; |
748 | } | |
749 | ||
aef9ec39 RD |
750 | static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) |
751 | { | |
752 | struct srp_request *req; | |
753 | struct scsi_cmnd *scmnd; | |
754 | unsigned long flags; | |
755 | s32 delta; | |
756 | ||
757 | delta = (s32) be32_to_cpu(rsp->req_lim_delta); | |
758 | ||
759 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
760 | ||
761 | target->req_lim += delta; | |
762 | ||
763 | req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT]; | |
764 | ||
765 | if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { | |
766 | if (be32_to_cpu(rsp->resp_data_len) < 4) | |
767 | req->tsk_status = -1; | |
768 | else | |
769 | req->tsk_status = rsp->data[3]; | |
770 | complete(&req->done); | |
771 | } else { | |
d945e1df | 772 | scmnd = req->scmnd; |
aef9ec39 RD |
773 | if (!scmnd) |
774 | printk(KERN_ERR "Null scmnd for RSP w/tag %016llx\n", | |
775 | (unsigned long long) rsp->tag); | |
776 | scmnd->result = rsp->status; | |
777 | ||
778 | if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { | |
779 | memcpy(scmnd->sense_buffer, rsp->data + | |
780 | be32_to_cpu(rsp->resp_data_len), | |
781 | min_t(int, be32_to_cpu(rsp->sense_data_len), | |
782 | SCSI_SENSE_BUFFERSIZE)); | |
783 | } | |
784 | ||
785 | if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) | |
bb350d1d | 786 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt)); |
aef9ec39 | 787 | else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) |
bb350d1d | 788 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt)); |
aef9ec39 | 789 | |
aef9ec39 | 790 | if (!req->tsk_mgmt) { |
aef9ec39 RD |
791 | scmnd->host_scribble = (void *) -1L; |
792 | scmnd->scsi_done(scmnd); | |
793 | ||
d945e1df | 794 | srp_remove_req(target, req); |
aef9ec39 RD |
795 | } else |
796 | req->cmd_done = 1; | |
797 | } | |
798 | ||
799 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
800 | } | |
801 | ||
aef9ec39 RD |
802 | static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) |
803 | { | |
85507bcc | 804 | struct ib_device *dev; |
aef9ec39 RD |
805 | struct srp_iu *iu; |
806 | u8 opcode; | |
807 | ||
808 | iu = target->rx_ring[wc->wr_id & ~SRP_OP_RECV]; | |
809 | ||
85507bcc RC |
810 | dev = target->srp_host->dev->dev; |
811 | ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len, | |
812 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
813 | |
814 | opcode = *(u8 *) iu->buf; | |
815 | ||
816 | if (0) { | |
817 | int i; | |
818 | ||
819 | printk(KERN_ERR PFX "recv completion, opcode 0x%02x\n", opcode); | |
820 | ||
821 | for (i = 0; i < wc->byte_len; ++i) { | |
822 | if (i % 8 == 0) | |
823 | printk(KERN_ERR " [%02x] ", i); | |
824 | printk(" %02x", ((u8 *) iu->buf)[i]); | |
825 | if ((i + 1) % 8 == 0) | |
826 | printk("\n"); | |
827 | } | |
828 | ||
829 | if (wc->byte_len % 8) | |
830 | printk("\n"); | |
831 | } | |
832 | ||
833 | switch (opcode) { | |
834 | case SRP_RSP: | |
835 | srp_process_rsp(target, iu->buf); | |
836 | break; | |
837 | ||
838 | case SRP_T_LOGOUT: | |
839 | /* XXX Handle target logout */ | |
840 | printk(KERN_WARNING PFX "Got target logout request\n"); | |
841 | break; | |
842 | ||
843 | default: | |
844 | printk(KERN_WARNING PFX "Unhandled SRP opcode 0x%02x\n", opcode); | |
845 | break; | |
846 | } | |
847 | ||
85507bcc RC |
848 | ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len, |
849 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
850 | } |
851 | ||
852 | static void srp_completion(struct ib_cq *cq, void *target_ptr) | |
853 | { | |
854 | struct srp_target_port *target = target_ptr; | |
855 | struct ib_wc wc; | |
aef9ec39 RD |
856 | |
857 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
858 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
859 | if (wc.status) { | |
860 | printk(KERN_ERR PFX "failed %s status %d\n", | |
861 | wc.wr_id & SRP_OP_RECV ? "receive" : "send", | |
862 | wc.status); | |
1033ff67 | 863 | target->qp_in_error = 1; |
aef9ec39 RD |
864 | break; |
865 | } | |
866 | ||
867 | if (wc.wr_id & SRP_OP_RECV) | |
868 | srp_handle_recv(target, &wc); | |
869 | else | |
870 | ++target->tx_tail; | |
871 | } | |
872 | } | |
873 | ||
874 | static int __srp_post_recv(struct srp_target_port *target) | |
875 | { | |
876 | struct srp_iu *iu; | |
877 | struct ib_sge list; | |
878 | struct ib_recv_wr wr, *bad_wr; | |
879 | unsigned int next; | |
880 | int ret; | |
881 | ||
882 | next = target->rx_head & (SRP_RQ_SIZE - 1); | |
883 | wr.wr_id = next | SRP_OP_RECV; | |
884 | iu = target->rx_ring[next]; | |
885 | ||
886 | list.addr = iu->dma; | |
887 | list.length = iu->size; | |
f5358a17 | 888 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
889 | |
890 | wr.next = NULL; | |
891 | wr.sg_list = &list; | |
892 | wr.num_sge = 1; | |
893 | ||
894 | ret = ib_post_recv(target->qp, &wr, &bad_wr); | |
895 | if (!ret) | |
896 | ++target->rx_head; | |
897 | ||
898 | return ret; | |
899 | } | |
900 | ||
901 | static int srp_post_recv(struct srp_target_port *target) | |
902 | { | |
903 | unsigned long flags; | |
904 | int ret; | |
905 | ||
906 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
907 | ret = __srp_post_recv(target); | |
908 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
909 | ||
910 | return ret; | |
911 | } | |
912 | ||
913 | /* | |
914 | * Must be called with target->scsi_host->host_lock held to protect | |
47f2bce9 RD |
915 | * req_lim and tx_head. Lock cannot be dropped between call here and |
916 | * call to __srp_post_send(). | |
aef9ec39 RD |
917 | */ |
918 | static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target) | |
919 | { | |
920 | if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) | |
921 | return NULL; | |
922 | ||
6bfa24fa RD |
923 | if (unlikely(target->req_lim < 1)) |
924 | ++target->zero_req_lim; | |
47f2bce9 | 925 | |
aef9ec39 RD |
926 | return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; |
927 | } | |
928 | ||
929 | /* | |
930 | * Must be called with target->scsi_host->host_lock held to protect | |
931 | * req_lim and tx_head. | |
932 | */ | |
933 | static int __srp_post_send(struct srp_target_port *target, | |
934 | struct srp_iu *iu, int len) | |
935 | { | |
936 | struct ib_sge list; | |
937 | struct ib_send_wr wr, *bad_wr; | |
938 | int ret = 0; | |
939 | ||
aef9ec39 RD |
940 | list.addr = iu->dma; |
941 | list.length = len; | |
f5358a17 | 942 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
943 | |
944 | wr.next = NULL; | |
945 | wr.wr_id = target->tx_head & SRP_SQ_SIZE; | |
946 | wr.sg_list = &list; | |
947 | wr.num_sge = 1; | |
948 | wr.opcode = IB_WR_SEND; | |
949 | wr.send_flags = IB_SEND_SIGNALED; | |
950 | ||
951 | ret = ib_post_send(target->qp, &wr, &bad_wr); | |
952 | ||
953 | if (!ret) { | |
954 | ++target->tx_head; | |
955 | --target->req_lim; | |
956 | } | |
957 | ||
958 | return ret; | |
959 | } | |
960 | ||
961 | static int srp_queuecommand(struct scsi_cmnd *scmnd, | |
962 | void (*done)(struct scsi_cmnd *)) | |
963 | { | |
964 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
965 | struct srp_request *req; | |
966 | struct srp_iu *iu; | |
967 | struct srp_cmd *cmd; | |
85507bcc | 968 | struct ib_device *dev; |
aef9ec39 RD |
969 | int len; |
970 | ||
971 | if (target->state == SRP_TARGET_CONNECTING) | |
972 | goto err; | |
973 | ||
974 | if (target->state == SRP_TARGET_DEAD || | |
975 | target->state == SRP_TARGET_REMOVED) { | |
976 | scmnd->result = DID_BAD_TARGET << 16; | |
977 | done(scmnd); | |
978 | return 0; | |
979 | } | |
980 | ||
981 | iu = __srp_get_tx_iu(target); | |
982 | if (!iu) | |
983 | goto err; | |
984 | ||
85507bcc RC |
985 | dev = target->srp_host->dev->dev; |
986 | ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len, | |
987 | DMA_TO_DEVICE); | |
aef9ec39 | 988 | |
d945e1df | 989 | req = list_entry(target->free_reqs.next, struct srp_request, list); |
aef9ec39 RD |
990 | |
991 | scmnd->scsi_done = done; | |
992 | scmnd->result = 0; | |
d945e1df | 993 | scmnd->host_scribble = (void *) (long) req->index; |
aef9ec39 RD |
994 | |
995 | cmd = iu->buf; | |
996 | memset(cmd, 0, sizeof *cmd); | |
997 | ||
998 | cmd->opcode = SRP_CMD; | |
999 | cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); | |
d945e1df | 1000 | cmd->tag = req->index; |
aef9ec39 RD |
1001 | memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); |
1002 | ||
aef9ec39 RD |
1003 | req->scmnd = scmnd; |
1004 | req->cmd = iu; | |
1005 | req->cmd_done = 0; | |
1006 | req->tsk_mgmt = NULL; | |
1007 | ||
1008 | len = srp_map_data(scmnd, target, req); | |
1009 | if (len < 0) { | |
1010 | printk(KERN_ERR PFX "Failed to map data\n"); | |
1011 | goto err; | |
1012 | } | |
1013 | ||
1014 | if (__srp_post_recv(target)) { | |
1015 | printk(KERN_ERR PFX "Recv failed\n"); | |
1016 | goto err_unmap; | |
1017 | } | |
1018 | ||
85507bcc RC |
1019 | ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len, |
1020 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1021 | |
1022 | if (__srp_post_send(target, iu, len)) { | |
1023 | printk(KERN_ERR PFX "Send failed\n"); | |
1024 | goto err_unmap; | |
1025 | } | |
1026 | ||
d945e1df | 1027 | list_move_tail(&req->list, &target->req_queue); |
aef9ec39 RD |
1028 | |
1029 | return 0; | |
1030 | ||
1031 | err_unmap: | |
1032 | srp_unmap_data(scmnd, target, req); | |
1033 | ||
1034 | err: | |
1035 | return SCSI_MLQUEUE_HOST_BUSY; | |
1036 | } | |
1037 | ||
1038 | static int srp_alloc_iu_bufs(struct srp_target_port *target) | |
1039 | { | |
1040 | int i; | |
1041 | ||
1042 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1043 | target->rx_ring[i] = srp_alloc_iu(target->srp_host, | |
1044 | target->max_ti_iu_len, | |
1045 | GFP_KERNEL, DMA_FROM_DEVICE); | |
1046 | if (!target->rx_ring[i]) | |
1047 | goto err; | |
1048 | } | |
1049 | ||
1050 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1051 | target->tx_ring[i] = srp_alloc_iu(target->srp_host, | |
74b0a15b | 1052 | srp_max_iu_len, |
aef9ec39 RD |
1053 | GFP_KERNEL, DMA_TO_DEVICE); |
1054 | if (!target->tx_ring[i]) | |
1055 | goto err; | |
1056 | } | |
1057 | ||
1058 | return 0; | |
1059 | ||
1060 | err: | |
1061 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1062 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
1063 | target->rx_ring[i] = NULL; | |
1064 | } | |
1065 | ||
1066 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1067 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
1068 | target->tx_ring[i] = NULL; | |
1069 | } | |
1070 | ||
1071 | return -ENOMEM; | |
1072 | } | |
1073 | ||
1074 | static void srp_cm_rej_handler(struct ib_cm_id *cm_id, | |
1075 | struct ib_cm_event *event, | |
1076 | struct srp_target_port *target) | |
1077 | { | |
1078 | struct ib_class_port_info *cpi; | |
1079 | int opcode; | |
1080 | ||
1081 | switch (event->param.rej_rcvd.reason) { | |
1082 | case IB_CM_REJ_PORT_CM_REDIRECT: | |
1083 | cpi = event->param.rej_rcvd.ari; | |
1084 | target->path.dlid = cpi->redirect_lid; | |
1085 | target->path.pkey = cpi->redirect_pkey; | |
1086 | cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; | |
1087 | memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); | |
1088 | ||
1089 | target->status = target->path.dlid ? | |
1090 | SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; | |
1091 | break; | |
1092 | ||
1093 | case IB_CM_REJ_PORT_REDIRECT: | |
1094 | if (topspin_workarounds && | |
1095 | !memcmp(&target->ioc_guid, topspin_oui, 3)) { | |
1096 | /* | |
1097 | * Topspin/Cisco SRP gateways incorrectly send | |
1098 | * reject reason code 25 when they mean 24 | |
1099 | * (port redirect). | |
1100 | */ | |
1101 | memcpy(target->path.dgid.raw, | |
1102 | event->param.rej_rcvd.ari, 16); | |
1103 | ||
1104 | printk(KERN_DEBUG PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", | |
1105 | (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), | |
1106 | (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); | |
1107 | ||
1108 | target->status = SRP_PORT_REDIRECT; | |
1109 | } else { | |
1110 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); | |
1111 | target->status = -ECONNRESET; | |
1112 | } | |
1113 | break; | |
1114 | ||
1115 | case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: | |
1116 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); | |
1117 | target->status = -ECONNRESET; | |
1118 | break; | |
1119 | ||
1120 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1121 | opcode = *(u8 *) event->private_data; | |
1122 | if (opcode == SRP_LOGIN_REJ) { | |
1123 | struct srp_login_rej *rej = event->private_data; | |
1124 | u32 reason = be32_to_cpu(rej->reason); | |
1125 | ||
1126 | if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) | |
1127 | printk(KERN_WARNING PFX | |
1128 | "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); | |
1129 | else | |
1130 | printk(KERN_WARNING PFX | |
1131 | "SRP LOGIN REJECTED, reason 0x%08x\n", reason); | |
1132 | } else | |
1133 | printk(KERN_WARNING " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," | |
1134 | " opcode 0x%02x\n", opcode); | |
1135 | target->status = -ECONNRESET; | |
1136 | break; | |
1137 | ||
1138 | default: | |
1139 | printk(KERN_WARNING " REJ reason 0x%x\n", | |
1140 | event->param.rej_rcvd.reason); | |
1141 | target->status = -ECONNRESET; | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
1146 | { | |
1147 | struct srp_target_port *target = cm_id->context; | |
1148 | struct ib_qp_attr *qp_attr = NULL; | |
1149 | int attr_mask = 0; | |
1150 | int comp = 0; | |
1151 | int opcode = 0; | |
1152 | ||
1153 | switch (event->event) { | |
1154 | case IB_CM_REQ_ERROR: | |
1155 | printk(KERN_DEBUG PFX "Sending CM REQ failed\n"); | |
1156 | comp = 1; | |
1157 | target->status = -ECONNRESET; | |
1158 | break; | |
1159 | ||
1160 | case IB_CM_REP_RECEIVED: | |
1161 | comp = 1; | |
1162 | opcode = *(u8 *) event->private_data; | |
1163 | ||
1164 | if (opcode == SRP_LOGIN_RSP) { | |
1165 | struct srp_login_rsp *rsp = event->private_data; | |
1166 | ||
1167 | target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); | |
1168 | target->req_lim = be32_to_cpu(rsp->req_lim_delta); | |
1169 | ||
1170 | target->scsi_host->can_queue = min(target->req_lim, | |
1171 | target->scsi_host->can_queue); | |
1172 | } else { | |
1173 | printk(KERN_WARNING PFX "Unhandled RSP opcode %#x\n", opcode); | |
1174 | target->status = -ECONNRESET; | |
1175 | break; | |
1176 | } | |
1177 | ||
d2fcea7d VP |
1178 | if (!target->rx_ring[0]) { |
1179 | target->status = srp_alloc_iu_bufs(target); | |
1180 | if (target->status) | |
1181 | break; | |
1182 | } | |
aef9ec39 RD |
1183 | |
1184 | qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); | |
1185 | if (!qp_attr) { | |
1186 | target->status = -ENOMEM; | |
1187 | break; | |
1188 | } | |
1189 | ||
1190 | qp_attr->qp_state = IB_QPS_RTR; | |
1191 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1192 | if (target->status) | |
1193 | break; | |
1194 | ||
1195 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1196 | if (target->status) | |
1197 | break; | |
1198 | ||
1199 | target->status = srp_post_recv(target); | |
1200 | if (target->status) | |
1201 | break; | |
1202 | ||
1203 | qp_attr->qp_state = IB_QPS_RTS; | |
1204 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1205 | if (target->status) | |
1206 | break; | |
1207 | ||
1208 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1209 | if (target->status) | |
1210 | break; | |
1211 | ||
1212 | target->status = ib_send_cm_rtu(cm_id, NULL, 0); | |
1213 | if (target->status) | |
1214 | break; | |
1215 | ||
1216 | break; | |
1217 | ||
1218 | case IB_CM_REJ_RECEIVED: | |
1219 | printk(KERN_DEBUG PFX "REJ received\n"); | |
1220 | comp = 1; | |
1221 | ||
1222 | srp_cm_rej_handler(cm_id, event, target); | |
1223 | break; | |
1224 | ||
b7ac4ab4 IR |
1225 | case IB_CM_DREQ_RECEIVED: |
1226 | printk(KERN_WARNING PFX "DREQ received - connection closed\n"); | |
1227 | if (ib_send_cm_drep(cm_id, NULL, 0)) | |
1228 | printk(KERN_ERR PFX "Sending CM DREP failed\n"); | |
aef9ec39 RD |
1229 | break; |
1230 | ||
1231 | case IB_CM_TIMEWAIT_EXIT: | |
1232 | printk(KERN_ERR PFX "connection closed\n"); | |
1233 | ||
1234 | comp = 1; | |
1235 | target->status = 0; | |
1236 | break; | |
1237 | ||
b7ac4ab4 IR |
1238 | case IB_CM_MRA_RECEIVED: |
1239 | case IB_CM_DREQ_ERROR: | |
1240 | case IB_CM_DREP_RECEIVED: | |
1241 | break; | |
1242 | ||
aef9ec39 RD |
1243 | default: |
1244 | printk(KERN_WARNING PFX "Unhandled CM event %d\n", event->event); | |
1245 | break; | |
1246 | } | |
1247 | ||
1248 | if (comp) | |
1249 | complete(&target->done); | |
1250 | ||
1251 | kfree(qp_attr); | |
1252 | ||
1253 | return 0; | |
1254 | } | |
1255 | ||
d945e1df RD |
1256 | static int srp_send_tsk_mgmt(struct srp_target_port *target, |
1257 | struct srp_request *req, u8 func) | |
aef9ec39 | 1258 | { |
aef9ec39 RD |
1259 | struct srp_iu *iu; |
1260 | struct srp_tsk_mgmt *tsk_mgmt; | |
aef9ec39 RD |
1261 | |
1262 | spin_lock_irq(target->scsi_host->host_lock); | |
1263 | ||
1285b3a0 RD |
1264 | if (target->state == SRP_TARGET_DEAD || |
1265 | target->state == SRP_TARGET_REMOVED) { | |
d945e1df | 1266 | req->scmnd->result = DID_BAD_TARGET << 16; |
1285b3a0 RD |
1267 | goto out; |
1268 | } | |
1269 | ||
aef9ec39 RD |
1270 | init_completion(&req->done); |
1271 | ||
1272 | iu = __srp_get_tx_iu(target); | |
1273 | if (!iu) | |
1274 | goto out; | |
1275 | ||
1276 | tsk_mgmt = iu->buf; | |
1277 | memset(tsk_mgmt, 0, sizeof *tsk_mgmt); | |
1278 | ||
1279 | tsk_mgmt->opcode = SRP_TSK_MGMT; | |
d945e1df RD |
1280 | tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48); |
1281 | tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT; | |
aef9ec39 | 1282 | tsk_mgmt->tsk_mgmt_func = func; |
d945e1df | 1283 | tsk_mgmt->task_tag = req->index; |
aef9ec39 RD |
1284 | |
1285 | if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) | |
1286 | goto out; | |
1287 | ||
1288 | req->tsk_mgmt = iu; | |
1289 | ||
1290 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df | 1291 | |
aef9ec39 RD |
1292 | if (!wait_for_completion_timeout(&req->done, |
1293 | msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) | |
d945e1df | 1294 | return -1; |
aef9ec39 | 1295 | |
d945e1df | 1296 | return 0; |
aef9ec39 RD |
1297 | |
1298 | out: | |
1299 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df RD |
1300 | return -1; |
1301 | } | |
1302 | ||
1303 | static int srp_find_req(struct srp_target_port *target, | |
1304 | struct scsi_cmnd *scmnd, | |
1305 | struct srp_request **req) | |
1306 | { | |
1307 | if (scmnd->host_scribble == (void *) -1L) | |
1308 | return -1; | |
1309 | ||
1310 | *req = &target->req_ring[(long) scmnd->host_scribble]; | |
1311 | ||
1312 | return 0; | |
aef9ec39 RD |
1313 | } |
1314 | ||
1315 | static int srp_abort(struct scsi_cmnd *scmnd) | |
1316 | { | |
d945e1df RD |
1317 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1318 | struct srp_request *req; | |
1319 | int ret = SUCCESS; | |
1320 | ||
aef9ec39 RD |
1321 | printk(KERN_ERR "SRP abort called\n"); |
1322 | ||
1033ff67 IR |
1323 | if (target->qp_in_error) |
1324 | return FAILED; | |
d945e1df RD |
1325 | if (srp_find_req(target, scmnd, &req)) |
1326 | return FAILED; | |
1327 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK)) | |
1328 | return FAILED; | |
1329 | ||
1330 | spin_lock_irq(target->scsi_host->host_lock); | |
1331 | ||
1332 | if (req->cmd_done) { | |
1333 | srp_remove_req(target, req); | |
1334 | scmnd->scsi_done(scmnd); | |
1335 | } else if (!req->tsk_status) { | |
1336 | srp_remove_req(target, req); | |
1337 | scmnd->result = DID_ABORT << 16; | |
1338 | } else | |
1339 | ret = FAILED; | |
1340 | ||
1341 | spin_unlock_irq(target->scsi_host->host_lock); | |
1342 | ||
1343 | return ret; | |
aef9ec39 RD |
1344 | } |
1345 | ||
1346 | static int srp_reset_device(struct scsi_cmnd *scmnd) | |
1347 | { | |
d945e1df RD |
1348 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1349 | struct srp_request *req, *tmp; | |
1350 | ||
aef9ec39 RD |
1351 | printk(KERN_ERR "SRP reset_device called\n"); |
1352 | ||
1033ff67 IR |
1353 | if (target->qp_in_error) |
1354 | return FAILED; | |
d945e1df RD |
1355 | if (srp_find_req(target, scmnd, &req)) |
1356 | return FAILED; | |
1357 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET)) | |
1358 | return FAILED; | |
1359 | if (req->tsk_status) | |
1360 | return FAILED; | |
1361 | ||
1362 | spin_lock_irq(target->scsi_host->host_lock); | |
1363 | ||
1364 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) | |
526b4caa IR |
1365 | if (req->scmnd->device == scmnd->device) |
1366 | srp_reset_req(target, req); | |
d945e1df RD |
1367 | |
1368 | spin_unlock_irq(target->scsi_host->host_lock); | |
1369 | ||
1370 | return SUCCESS; | |
aef9ec39 RD |
1371 | } |
1372 | ||
1373 | static int srp_reset_host(struct scsi_cmnd *scmnd) | |
1374 | { | |
1375 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1376 | int ret = FAILED; | |
1377 | ||
1378 | printk(KERN_ERR PFX "SRP reset_host called\n"); | |
1379 | ||
1380 | if (!srp_reconnect_target(target)) | |
1381 | ret = SUCCESS; | |
1382 | ||
1383 | return ret; | |
1384 | } | |
1385 | ||
6ecb0c84 RD |
1386 | static ssize_t show_id_ext(struct class_device *cdev, char *buf) |
1387 | { | |
1388 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1389 | ||
1390 | if (target->state == SRP_TARGET_DEAD || | |
1391 | target->state == SRP_TARGET_REMOVED) | |
1392 | return -ENODEV; | |
1393 | ||
1394 | return sprintf(buf, "0x%016llx\n", | |
1395 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1396 | } | |
1397 | ||
1398 | static ssize_t show_ioc_guid(struct class_device *cdev, char *buf) | |
1399 | { | |
1400 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1401 | ||
1402 | if (target->state == SRP_TARGET_DEAD || | |
1403 | target->state == SRP_TARGET_REMOVED) | |
1404 | return -ENODEV; | |
1405 | ||
1406 | return sprintf(buf, "0x%016llx\n", | |
1407 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
1408 | } | |
1409 | ||
1410 | static ssize_t show_service_id(struct class_device *cdev, char *buf) | |
1411 | { | |
1412 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1413 | ||
1414 | if (target->state == SRP_TARGET_DEAD || | |
1415 | target->state == SRP_TARGET_REMOVED) | |
1416 | return -ENODEV; | |
1417 | ||
1418 | return sprintf(buf, "0x%016llx\n", | |
1419 | (unsigned long long) be64_to_cpu(target->service_id)); | |
1420 | } | |
1421 | ||
1422 | static ssize_t show_pkey(struct class_device *cdev, char *buf) | |
1423 | { | |
1424 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1425 | ||
1426 | if (target->state == SRP_TARGET_DEAD || | |
1427 | target->state == SRP_TARGET_REMOVED) | |
1428 | return -ENODEV; | |
1429 | ||
1430 | return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); | |
1431 | } | |
1432 | ||
1433 | static ssize_t show_dgid(struct class_device *cdev, char *buf) | |
1434 | { | |
1435 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1436 | ||
1437 | if (target->state == SRP_TARGET_DEAD || | |
1438 | target->state == SRP_TARGET_REMOVED) | |
1439 | return -ENODEV; | |
1440 | ||
1441 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1442 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]), | |
1443 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]), | |
1444 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]), | |
1445 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]), | |
1446 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]), | |
1447 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]), | |
1448 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]), | |
1449 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[7])); | |
1450 | } | |
1451 | ||
3633b3d0 IR |
1452 | static ssize_t show_orig_dgid(struct class_device *cdev, char *buf) |
1453 | { | |
1454 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1455 | ||
1456 | if (target->state == SRP_TARGET_DEAD || | |
1457 | target->state == SRP_TARGET_REMOVED) | |
1458 | return -ENODEV; | |
1459 | ||
1460 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1461 | be16_to_cpu(target->orig_dgid[0]), | |
1462 | be16_to_cpu(target->orig_dgid[1]), | |
1463 | be16_to_cpu(target->orig_dgid[2]), | |
1464 | be16_to_cpu(target->orig_dgid[3]), | |
1465 | be16_to_cpu(target->orig_dgid[4]), | |
1466 | be16_to_cpu(target->orig_dgid[5]), | |
1467 | be16_to_cpu(target->orig_dgid[6]), | |
1468 | be16_to_cpu(target->orig_dgid[7])); | |
1469 | } | |
1470 | ||
6bfa24fa RD |
1471 | static ssize_t show_zero_req_lim(struct class_device *cdev, char *buf) |
1472 | { | |
1473 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1474 | ||
1475 | if (target->state == SRP_TARGET_DEAD || | |
1476 | target->state == SRP_TARGET_REMOVED) | |
1477 | return -ENODEV; | |
1478 | ||
1479 | return sprintf(buf, "%d\n", target->zero_req_lim); | |
1480 | } | |
1481 | ||
ded7f1a1 IR |
1482 | static ssize_t show_local_ib_port(struct class_device *cdev, char *buf) |
1483 | { | |
1484 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1485 | ||
1486 | return sprintf(buf, "%d\n", target->srp_host->port); | |
1487 | } | |
1488 | ||
1489 | static ssize_t show_local_ib_device(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, "%s\n", target->srp_host->dev->dev->name); | |
1494 | } | |
1495 | ||
1496 | static CLASS_DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); | |
1497 | static CLASS_DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); | |
1498 | static CLASS_DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); | |
1499 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
1500 | static CLASS_DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); | |
3633b3d0 | 1501 | static CLASS_DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL); |
ded7f1a1 IR |
1502 | static CLASS_DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); |
1503 | static CLASS_DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL); | |
1504 | static CLASS_DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL); | |
6ecb0c84 RD |
1505 | |
1506 | static struct class_device_attribute *srp_host_attrs[] = { | |
1507 | &class_device_attr_id_ext, | |
1508 | &class_device_attr_ioc_guid, | |
1509 | &class_device_attr_service_id, | |
1510 | &class_device_attr_pkey, | |
1511 | &class_device_attr_dgid, | |
3633b3d0 | 1512 | &class_device_attr_orig_dgid, |
6bfa24fa | 1513 | &class_device_attr_zero_req_lim, |
ded7f1a1 IR |
1514 | &class_device_attr_local_ib_port, |
1515 | &class_device_attr_local_ib_device, | |
6ecb0c84 RD |
1516 | NULL |
1517 | }; | |
1518 | ||
aef9ec39 RD |
1519 | static struct scsi_host_template srp_template = { |
1520 | .module = THIS_MODULE, | |
b7f008fd RD |
1521 | .name = "InfiniBand SRP initiator", |
1522 | .proc_name = DRV_NAME, | |
aef9ec39 RD |
1523 | .info = srp_target_info, |
1524 | .queuecommand = srp_queuecommand, | |
1525 | .eh_abort_handler = srp_abort, | |
1526 | .eh_device_reset_handler = srp_reset_device, | |
1527 | .eh_host_reset_handler = srp_reset_host, | |
1528 | .can_queue = SRP_SQ_SIZE, | |
1529 | .this_id = -1, | |
aef9ec39 | 1530 | .cmd_per_lun = SRP_SQ_SIZE, |
6ecb0c84 RD |
1531 | .use_clustering = ENABLE_CLUSTERING, |
1532 | .shost_attrs = srp_host_attrs | |
aef9ec39 RD |
1533 | }; |
1534 | ||
1535 | static int srp_add_target(struct srp_host *host, struct srp_target_port *target) | |
1536 | { | |
3236822b FT |
1537 | struct srp_rport_identifiers ids; |
1538 | struct srp_rport *rport; | |
1539 | ||
aef9ec39 RD |
1540 | sprintf(target->target_name, "SRP.T10:%016llX", |
1541 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1542 | ||
f5358a17 | 1543 | if (scsi_add_host(target->scsi_host, host->dev->dev->dma_device)) |
aef9ec39 RD |
1544 | return -ENODEV; |
1545 | ||
3236822b FT |
1546 | memcpy(ids.port_id, &target->id_ext, 8); |
1547 | memcpy(ids.port_id + 8, &target->ioc_guid, 8); | |
1548 | rport = srp_rport_add(target->scsi_host, &ids); | |
1549 | if (IS_ERR(rport)) { | |
1550 | scsi_remove_host(target->scsi_host); | |
1551 | return PTR_ERR(rport); | |
1552 | } | |
1553 | ||
b3589fd4 | 1554 | spin_lock(&host->target_lock); |
aef9ec39 | 1555 | list_add_tail(&target->list, &host->target_list); |
b3589fd4 | 1556 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1557 | |
1558 | target->state = SRP_TARGET_LIVE; | |
1559 | ||
aef9ec39 | 1560 | scsi_scan_target(&target->scsi_host->shost_gendev, |
1962a4a1 | 1561 | 0, target->scsi_id, SCAN_WILD_CARD, 0); |
aef9ec39 RD |
1562 | |
1563 | return 0; | |
1564 | } | |
1565 | ||
1566 | static void srp_release_class_dev(struct class_device *class_dev) | |
1567 | { | |
1568 | struct srp_host *host = | |
1569 | container_of(class_dev, struct srp_host, class_dev); | |
1570 | ||
1571 | complete(&host->released); | |
1572 | } | |
1573 | ||
1574 | static struct class srp_class = { | |
1575 | .name = "infiniband_srp", | |
1576 | .release = srp_release_class_dev | |
1577 | }; | |
1578 | ||
1579 | /* | |
1580 | * Target ports are added by writing | |
1581 | * | |
1582 | * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, | |
1583 | * pkey=<P_Key>,service_id=<service ID> | |
1584 | * | |
1585 | * to the add_target sysfs attribute. | |
1586 | */ | |
1587 | enum { | |
1588 | SRP_OPT_ERR = 0, | |
1589 | SRP_OPT_ID_EXT = 1 << 0, | |
1590 | SRP_OPT_IOC_GUID = 1 << 1, | |
1591 | SRP_OPT_DGID = 1 << 2, | |
1592 | SRP_OPT_PKEY = 1 << 3, | |
1593 | SRP_OPT_SERVICE_ID = 1 << 4, | |
1594 | SRP_OPT_MAX_SECT = 1 << 5, | |
52fb2b50 | 1595 | SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, |
0c0450db | 1596 | SRP_OPT_IO_CLASS = 1 << 7, |
01cb9bcb | 1597 | SRP_OPT_INITIATOR_EXT = 1 << 8, |
aef9ec39 RD |
1598 | SRP_OPT_ALL = (SRP_OPT_ID_EXT | |
1599 | SRP_OPT_IOC_GUID | | |
1600 | SRP_OPT_DGID | | |
1601 | SRP_OPT_PKEY | | |
1602 | SRP_OPT_SERVICE_ID), | |
1603 | }; | |
1604 | ||
1605 | static match_table_t srp_opt_tokens = { | |
52fb2b50 VP |
1606 | { SRP_OPT_ID_EXT, "id_ext=%s" }, |
1607 | { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, | |
1608 | { SRP_OPT_DGID, "dgid=%s" }, | |
1609 | { SRP_OPT_PKEY, "pkey=%x" }, | |
1610 | { SRP_OPT_SERVICE_ID, "service_id=%s" }, | |
1611 | { SRP_OPT_MAX_SECT, "max_sect=%d" }, | |
1612 | { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, | |
0c0450db | 1613 | { SRP_OPT_IO_CLASS, "io_class=%x" }, |
01cb9bcb | 1614 | { SRP_OPT_INITIATOR_EXT, "initiator_ext=%s" }, |
52fb2b50 | 1615 | { SRP_OPT_ERR, NULL } |
aef9ec39 RD |
1616 | }; |
1617 | ||
1618 | static int srp_parse_options(const char *buf, struct srp_target_port *target) | |
1619 | { | |
1620 | char *options, *sep_opt; | |
1621 | char *p; | |
1622 | char dgid[3]; | |
1623 | substring_t args[MAX_OPT_ARGS]; | |
1624 | int opt_mask = 0; | |
1625 | int token; | |
1626 | int ret = -EINVAL; | |
1627 | int i; | |
1628 | ||
1629 | options = kstrdup(buf, GFP_KERNEL); | |
1630 | if (!options) | |
1631 | return -ENOMEM; | |
1632 | ||
1633 | sep_opt = options; | |
1634 | while ((p = strsep(&sep_opt, ",")) != NULL) { | |
1635 | if (!*p) | |
1636 | continue; | |
1637 | ||
1638 | token = match_token(p, srp_opt_tokens, args); | |
1639 | opt_mask |= token; | |
1640 | ||
1641 | switch (token) { | |
1642 | case SRP_OPT_ID_EXT: | |
1643 | p = match_strdup(args); | |
a20f3a6d IR |
1644 | if (!p) { |
1645 | ret = -ENOMEM; | |
1646 | goto out; | |
1647 | } | |
aef9ec39 RD |
1648 | target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1649 | kfree(p); | |
1650 | break; | |
1651 | ||
1652 | case SRP_OPT_IOC_GUID: | |
1653 | p = match_strdup(args); | |
a20f3a6d IR |
1654 | if (!p) { |
1655 | ret = -ENOMEM; | |
1656 | goto out; | |
1657 | } | |
aef9ec39 RD |
1658 | target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1659 | kfree(p); | |
1660 | break; | |
1661 | ||
1662 | case SRP_OPT_DGID: | |
1663 | p = match_strdup(args); | |
a20f3a6d IR |
1664 | if (!p) { |
1665 | ret = -ENOMEM; | |
1666 | goto out; | |
1667 | } | |
aef9ec39 RD |
1668 | if (strlen(p) != 32) { |
1669 | printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); | |
ce1823f0 | 1670 | kfree(p); |
aef9ec39 RD |
1671 | goto out; |
1672 | } | |
1673 | ||
1674 | for (i = 0; i < 16; ++i) { | |
1675 | strlcpy(dgid, p + i * 2, 3); | |
1676 | target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); | |
1677 | } | |
bf17c1c7 | 1678 | kfree(p); |
3633b3d0 | 1679 | memcpy(target->orig_dgid, target->path.dgid.raw, 16); |
aef9ec39 RD |
1680 | break; |
1681 | ||
1682 | case SRP_OPT_PKEY: | |
1683 | if (match_hex(args, &token)) { | |
1684 | printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); | |
1685 | goto out; | |
1686 | } | |
1687 | target->path.pkey = cpu_to_be16(token); | |
1688 | break; | |
1689 | ||
1690 | case SRP_OPT_SERVICE_ID: | |
1691 | p = match_strdup(args); | |
a20f3a6d IR |
1692 | if (!p) { |
1693 | ret = -ENOMEM; | |
1694 | goto out; | |
1695 | } | |
aef9ec39 RD |
1696 | target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1697 | kfree(p); | |
1698 | break; | |
1699 | ||
1700 | case SRP_OPT_MAX_SECT: | |
1701 | if (match_int(args, &token)) { | |
1702 | printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); | |
1703 | goto out; | |
1704 | } | |
1705 | target->scsi_host->max_sectors = token; | |
1706 | break; | |
1707 | ||
52fb2b50 VP |
1708 | case SRP_OPT_MAX_CMD_PER_LUN: |
1709 | if (match_int(args, &token)) { | |
1710 | printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); | |
1711 | goto out; | |
1712 | } | |
1713 | target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); | |
1714 | break; | |
1715 | ||
0c0450db R |
1716 | case SRP_OPT_IO_CLASS: |
1717 | if (match_hex(args, &token)) { | |
1718 | printk(KERN_WARNING PFX "bad IO class parameter '%s' \n", p); | |
1719 | goto out; | |
1720 | } | |
1721 | if (token != SRP_REV10_IB_IO_CLASS && | |
1722 | token != SRP_REV16A_IB_IO_CLASS) { | |
1723 | printk(KERN_WARNING PFX "unknown IO class parameter value" | |
1724 | " %x specified (use %x or %x).\n", | |
1725 | token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); | |
1726 | goto out; | |
1727 | } | |
1728 | target->io_class = token; | |
1729 | break; | |
1730 | ||
01cb9bcb IR |
1731 | case SRP_OPT_INITIATOR_EXT: |
1732 | p = match_strdup(args); | |
a20f3a6d IR |
1733 | if (!p) { |
1734 | ret = -ENOMEM; | |
1735 | goto out; | |
1736 | } | |
01cb9bcb IR |
1737 | target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1738 | kfree(p); | |
1739 | break; | |
1740 | ||
aef9ec39 RD |
1741 | default: |
1742 | printk(KERN_WARNING PFX "unknown parameter or missing value " | |
1743 | "'%s' in target creation request\n", p); | |
1744 | goto out; | |
1745 | } | |
1746 | } | |
1747 | ||
1748 | if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) | |
1749 | ret = 0; | |
1750 | else | |
1751 | for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) | |
1752 | if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && | |
1753 | !(srp_opt_tokens[i].token & opt_mask)) | |
1754 | printk(KERN_WARNING PFX "target creation request is " | |
1755 | "missing parameter '%s'\n", | |
1756 | srp_opt_tokens[i].pattern); | |
1757 | ||
1758 | out: | |
1759 | kfree(options); | |
1760 | return ret; | |
1761 | } | |
1762 | ||
1763 | static ssize_t srp_create_target(struct class_device *class_dev, | |
1764 | const char *buf, size_t count) | |
1765 | { | |
1766 | struct srp_host *host = | |
1767 | container_of(class_dev, struct srp_host, class_dev); | |
1768 | struct Scsi_Host *target_host; | |
1769 | struct srp_target_port *target; | |
1770 | int ret; | |
1771 | int i; | |
1772 | ||
1773 | target_host = scsi_host_alloc(&srp_template, | |
1774 | sizeof (struct srp_target_port)); | |
1775 | if (!target_host) | |
1776 | return -ENOMEM; | |
1777 | ||
3236822b | 1778 | target_host->transportt = ib_srp_transport_template; |
3c8edf0e AR |
1779 | target_host->max_lun = SRP_MAX_LUN; |
1780 | target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; | |
5f068992 | 1781 | |
aef9ec39 | 1782 | target = host_to_target(target_host); |
aef9ec39 | 1783 | |
0c0450db | 1784 | target->io_class = SRP_REV16A_IB_IO_CLASS; |
aef9ec39 RD |
1785 | target->scsi_host = target_host; |
1786 | target->srp_host = host; | |
1787 | ||
d945e1df | 1788 | INIT_LIST_HEAD(&target->free_reqs); |
aef9ec39 | 1789 | INIT_LIST_HEAD(&target->req_queue); |
d945e1df RD |
1790 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
1791 | target->req_ring[i].index = i; | |
1792 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
1793 | } | |
aef9ec39 RD |
1794 | |
1795 | ret = srp_parse_options(buf, target); | |
1796 | if (ret) | |
1797 | goto err; | |
1798 | ||
f5358a17 | 1799 | ib_get_cached_gid(host->dev->dev, host->port, 0, &target->path.sgid); |
aef9ec39 RD |
1800 | |
1801 | printk(KERN_DEBUG PFX "new target: id_ext %016llx ioc_guid %016llx pkey %04x " | |
1802 | "service_id %016llx dgid %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1803 | (unsigned long long) be64_to_cpu(target->id_ext), | |
1804 | (unsigned long long) be64_to_cpu(target->ioc_guid), | |
1805 | be16_to_cpu(target->path.pkey), | |
1806 | (unsigned long long) be64_to_cpu(target->service_id), | |
1807 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[0]), | |
1808 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[2]), | |
1809 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[4]), | |
1810 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[6]), | |
1811 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[8]), | |
1812 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[10]), | |
1813 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[12]), | |
1814 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[14])); | |
1815 | ||
1816 | ret = srp_create_target_ib(target); | |
1817 | if (ret) | |
1818 | goto err; | |
1819 | ||
f5358a17 | 1820 | target->cm_id = ib_create_cm_id(host->dev->dev, srp_cm_handler, target); |
aef9ec39 RD |
1821 | if (IS_ERR(target->cm_id)) { |
1822 | ret = PTR_ERR(target->cm_id); | |
1823 | goto err_free; | |
1824 | } | |
1825 | ||
1033ff67 | 1826 | target->qp_in_error = 0; |
aef9ec39 RD |
1827 | ret = srp_connect_target(target); |
1828 | if (ret) { | |
1829 | printk(KERN_ERR PFX "Connection failed\n"); | |
1830 | goto err_cm_id; | |
1831 | } | |
1832 | ||
1833 | ret = srp_add_target(host, target); | |
1834 | if (ret) | |
1835 | goto err_disconnect; | |
1836 | ||
1837 | return count; | |
1838 | ||
1839 | err_disconnect: | |
1840 | srp_disconnect_target(target); | |
1841 | ||
1842 | err_cm_id: | |
1843 | ib_destroy_cm_id(target->cm_id); | |
1844 | ||
1845 | err_free: | |
1846 | srp_free_target_ib(target); | |
1847 | ||
1848 | err: | |
1849 | scsi_host_put(target_host); | |
1850 | ||
1851 | return ret; | |
1852 | } | |
1853 | ||
1854 | static CLASS_DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); | |
1855 | ||
1856 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) | |
1857 | { | |
1858 | struct srp_host *host = | |
1859 | container_of(class_dev, struct srp_host, class_dev); | |
1860 | ||
f5358a17 | 1861 | return sprintf(buf, "%s\n", host->dev->dev->name); |
aef9ec39 RD |
1862 | } |
1863 | ||
1864 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
1865 | ||
1866 | static ssize_t show_port(struct class_device *class_dev, char *buf) | |
1867 | { | |
1868 | struct srp_host *host = | |
1869 | container_of(class_dev, struct srp_host, class_dev); | |
1870 | ||
1871 | return sprintf(buf, "%d\n", host->port); | |
1872 | } | |
1873 | ||
1874 | static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL); | |
1875 | ||
f5358a17 | 1876 | static struct srp_host *srp_add_port(struct srp_device *device, u8 port) |
aef9ec39 RD |
1877 | { |
1878 | struct srp_host *host; | |
1879 | ||
1880 | host = kzalloc(sizeof *host, GFP_KERNEL); | |
1881 | if (!host) | |
1882 | return NULL; | |
1883 | ||
1884 | INIT_LIST_HEAD(&host->target_list); | |
b3589fd4 | 1885 | spin_lock_init(&host->target_lock); |
aef9ec39 RD |
1886 | init_completion(&host->released); |
1887 | host->dev = device; | |
1888 | host->port = port; | |
1889 | ||
aef9ec39 | 1890 | host->class_dev.class = &srp_class; |
f5358a17 | 1891 | host->class_dev.dev = device->dev->dma_device; |
aef9ec39 | 1892 | snprintf(host->class_dev.class_id, BUS_ID_SIZE, "srp-%s-%d", |
f5358a17 | 1893 | device->dev->name, port); |
aef9ec39 RD |
1894 | |
1895 | if (class_device_register(&host->class_dev)) | |
f5358a17 | 1896 | goto free_host; |
aef9ec39 RD |
1897 | if (class_device_create_file(&host->class_dev, &class_device_attr_add_target)) |
1898 | goto err_class; | |
1899 | if (class_device_create_file(&host->class_dev, &class_device_attr_ibdev)) | |
1900 | goto err_class; | |
1901 | if (class_device_create_file(&host->class_dev, &class_device_attr_port)) | |
1902 | goto err_class; | |
1903 | ||
1904 | return host; | |
1905 | ||
1906 | err_class: | |
1907 | class_device_unregister(&host->class_dev); | |
1908 | ||
f5358a17 | 1909 | free_host: |
aef9ec39 RD |
1910 | kfree(host); |
1911 | ||
1912 | return NULL; | |
1913 | } | |
1914 | ||
1915 | static void srp_add_one(struct ib_device *device) | |
1916 | { | |
f5358a17 RD |
1917 | struct srp_device *srp_dev; |
1918 | struct ib_device_attr *dev_attr; | |
1919 | struct ib_fmr_pool_param fmr_param; | |
aef9ec39 | 1920 | struct srp_host *host; |
aef9ec39 RD |
1921 | int s, e, p; |
1922 | ||
f5358a17 RD |
1923 | dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); |
1924 | if (!dev_attr) | |
cf311cd4 | 1925 | return; |
aef9ec39 | 1926 | |
f5358a17 RD |
1927 | if (ib_query_device(device, dev_attr)) { |
1928 | printk(KERN_WARNING PFX "Query device failed for %s\n", | |
1929 | device->name); | |
1930 | goto free_attr; | |
1931 | } | |
1932 | ||
1933 | srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); | |
1934 | if (!srp_dev) | |
1935 | goto free_attr; | |
1936 | ||
1937 | /* | |
1938 | * Use the smallest page size supported by the HCA, down to a | |
1939 | * minimum of 512 bytes (which is the smallest sector that a | |
1940 | * SCSI command will ever carry). | |
1941 | */ | |
1942 | srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); | |
1943 | srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; | |
bf628dc2 | 1944 | srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1); |
f5358a17 RD |
1945 | |
1946 | INIT_LIST_HEAD(&srp_dev->dev_list); | |
1947 | ||
1948 | srp_dev->dev = device; | |
1949 | srp_dev->pd = ib_alloc_pd(device); | |
1950 | if (IS_ERR(srp_dev->pd)) | |
1951 | goto free_dev; | |
1952 | ||
1953 | srp_dev->mr = ib_get_dma_mr(srp_dev->pd, | |
1954 | IB_ACCESS_LOCAL_WRITE | | |
1955 | IB_ACCESS_REMOTE_READ | | |
1956 | IB_ACCESS_REMOTE_WRITE); | |
1957 | if (IS_ERR(srp_dev->mr)) | |
1958 | goto err_pd; | |
1959 | ||
1960 | memset(&fmr_param, 0, sizeof fmr_param); | |
1961 | fmr_param.pool_size = SRP_FMR_POOL_SIZE; | |
1962 | fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; | |
1963 | fmr_param.cache = 1; | |
1964 | fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; | |
1965 | fmr_param.page_shift = srp_dev->fmr_page_shift; | |
1966 | fmr_param.access = (IB_ACCESS_LOCAL_WRITE | | |
1967 | IB_ACCESS_REMOTE_WRITE | | |
1968 | IB_ACCESS_REMOTE_READ); | |
1969 | ||
1970 | srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); | |
1971 | if (IS_ERR(srp_dev->fmr_pool)) | |
1972 | srp_dev->fmr_pool = NULL; | |
aef9ec39 | 1973 | |
07ebafba | 1974 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
aef9ec39 RD |
1975 | s = 0; |
1976 | e = 0; | |
1977 | } else { | |
1978 | s = 1; | |
1979 | e = device->phys_port_cnt; | |
1980 | } | |
1981 | ||
1982 | for (p = s; p <= e; ++p) { | |
f5358a17 | 1983 | host = srp_add_port(srp_dev, p); |
aef9ec39 | 1984 | if (host) |
f5358a17 | 1985 | list_add_tail(&host->list, &srp_dev->dev_list); |
aef9ec39 RD |
1986 | } |
1987 | ||
f5358a17 RD |
1988 | ib_set_client_data(device, &srp_client, srp_dev); |
1989 | ||
1990 | goto free_attr; | |
1991 | ||
1992 | err_pd: | |
1993 | ib_dealloc_pd(srp_dev->pd); | |
1994 | ||
1995 | free_dev: | |
1996 | kfree(srp_dev); | |
1997 | ||
1998 | free_attr: | |
1999 | kfree(dev_attr); | |
aef9ec39 RD |
2000 | } |
2001 | ||
2002 | static void srp_remove_one(struct ib_device *device) | |
2003 | { | |
f5358a17 | 2004 | struct srp_device *srp_dev; |
aef9ec39 RD |
2005 | struct srp_host *host, *tmp_host; |
2006 | LIST_HEAD(target_list); | |
2007 | struct srp_target_port *target, *tmp_target; | |
aef9ec39 | 2008 | |
f5358a17 | 2009 | srp_dev = ib_get_client_data(device, &srp_client); |
aef9ec39 | 2010 | |
f5358a17 | 2011 | list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { |
aef9ec39 RD |
2012 | class_device_unregister(&host->class_dev); |
2013 | /* | |
2014 | * Wait for the sysfs entry to go away, so that no new | |
2015 | * target ports can be created. | |
2016 | */ | |
2017 | wait_for_completion(&host->released); | |
2018 | ||
2019 | /* | |
2020 | * Mark all target ports as removed, so we stop queueing | |
2021 | * commands and don't try to reconnect. | |
2022 | */ | |
b3589fd4 | 2023 | spin_lock(&host->target_lock); |
549c5fc2 | 2024 | list_for_each_entry(target, &host->target_list, list) { |
0c5b3952 IR |
2025 | spin_lock_irq(target->scsi_host->host_lock); |
2026 | target->state = SRP_TARGET_REMOVED; | |
2027 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 | 2028 | } |
b3589fd4 | 2029 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
2030 | |
2031 | /* | |
2032 | * Wait for any reconnection tasks that may have | |
2033 | * started before we marked our target ports as | |
2034 | * removed, and any target port removal tasks. | |
2035 | */ | |
2036 | flush_scheduled_work(); | |
2037 | ||
2038 | list_for_each_entry_safe(target, tmp_target, | |
2039 | &host->target_list, list) { | |
2040 | scsi_remove_host(target->scsi_host); | |
2041 | srp_disconnect_target(target); | |
2042 | ib_destroy_cm_id(target->cm_id); | |
2043 | srp_free_target_ib(target); | |
2044 | scsi_host_put(target->scsi_host); | |
2045 | } | |
2046 | ||
aef9ec39 RD |
2047 | kfree(host); |
2048 | } | |
2049 | ||
f5358a17 RD |
2050 | if (srp_dev->fmr_pool) |
2051 | ib_destroy_fmr_pool(srp_dev->fmr_pool); | |
2052 | ib_dereg_mr(srp_dev->mr); | |
2053 | ib_dealloc_pd(srp_dev->pd); | |
2054 | ||
2055 | kfree(srp_dev); | |
aef9ec39 RD |
2056 | } |
2057 | ||
3236822b FT |
2058 | static struct srp_function_template ib_srp_transport_functions = { |
2059 | }; | |
2060 | ||
aef9ec39 RD |
2061 | static int __init srp_init_module(void) |
2062 | { | |
2063 | int ret; | |
2064 | ||
3236822b FT |
2065 | ib_srp_transport_template = |
2066 | srp_attach_transport(&ib_srp_transport_functions); | |
2067 | if (!ib_srp_transport_template) | |
2068 | return -ENOMEM; | |
2069 | ||
74b0a15b VP |
2070 | srp_template.sg_tablesize = srp_sg_tablesize; |
2071 | srp_max_iu_len = (sizeof (struct srp_cmd) + | |
2072 | sizeof (struct srp_indirect_buf) + | |
2073 | srp_sg_tablesize * 16); | |
2074 | ||
aef9ec39 RD |
2075 | ret = class_register(&srp_class); |
2076 | if (ret) { | |
2077 | printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); | |
3236822b | 2078 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2079 | return ret; |
2080 | } | |
2081 | ||
c1a0b23b MT |
2082 | ib_sa_register_client(&srp_sa_client); |
2083 | ||
aef9ec39 RD |
2084 | ret = ib_register_client(&srp_client); |
2085 | if (ret) { | |
2086 | printk(KERN_ERR PFX "couldn't register IB client\n"); | |
3236822b | 2087 | srp_release_transport(ib_srp_transport_template); |
c1a0b23b | 2088 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 RD |
2089 | class_unregister(&srp_class); |
2090 | return ret; | |
2091 | } | |
2092 | ||
2093 | return 0; | |
2094 | } | |
2095 | ||
2096 | static void __exit srp_cleanup_module(void) | |
2097 | { | |
2098 | ib_unregister_client(&srp_client); | |
c1a0b23b | 2099 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 | 2100 | class_unregister(&srp_class); |
3236822b | 2101 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2102 | } |
2103 | ||
2104 | module_init(srp_init_module); | |
2105 | module_exit(srp_cleanup_module); |