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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) | |
7aa54bd7 DD |
275 | shost_printk(KERN_ERR, target->scsi_host, |
276 | PFX "Got failed path rec status %d\n", status); | |
aef9ec39 RD |
277 | else |
278 | target->path = *pathrec; | |
279 | complete(&target->done); | |
280 | } | |
281 | ||
282 | static int srp_lookup_path(struct srp_target_port *target) | |
283 | { | |
284 | target->path.numb_path = 1; | |
285 | ||
286 | init_completion(&target->done); | |
287 | ||
c1a0b23b MT |
288 | target->path_query_id = ib_sa_path_rec_get(&srp_sa_client, |
289 | target->srp_host->dev->dev, | |
aef9ec39 RD |
290 | target->srp_host->port, |
291 | &target->path, | |
247e020e | 292 | IB_SA_PATH_REC_SERVICE_ID | |
aef9ec39 RD |
293 | IB_SA_PATH_REC_DGID | |
294 | IB_SA_PATH_REC_SGID | | |
295 | IB_SA_PATH_REC_NUMB_PATH | | |
296 | IB_SA_PATH_REC_PKEY, | |
297 | SRP_PATH_REC_TIMEOUT_MS, | |
298 | GFP_KERNEL, | |
299 | srp_path_rec_completion, | |
300 | target, &target->path_query); | |
301 | if (target->path_query_id < 0) | |
302 | return target->path_query_id; | |
303 | ||
304 | wait_for_completion(&target->done); | |
305 | ||
306 | if (target->status < 0) | |
7aa54bd7 DD |
307 | shost_printk(KERN_WARNING, target->scsi_host, |
308 | PFX "Path record query failed\n"); | |
aef9ec39 RD |
309 | |
310 | return target->status; | |
311 | } | |
312 | ||
313 | static int srp_send_req(struct srp_target_port *target) | |
314 | { | |
315 | struct { | |
316 | struct ib_cm_req_param param; | |
317 | struct srp_login_req priv; | |
318 | } *req = NULL; | |
319 | int status; | |
320 | ||
321 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
322 | if (!req) | |
323 | return -ENOMEM; | |
324 | ||
325 | req->param.primary_path = &target->path; | |
326 | req->param.alternate_path = NULL; | |
327 | req->param.service_id = target->service_id; | |
328 | req->param.qp_num = target->qp->qp_num; | |
329 | req->param.qp_type = target->qp->qp_type; | |
330 | req->param.private_data = &req->priv; | |
331 | req->param.private_data_len = sizeof req->priv; | |
332 | req->param.flow_control = 1; | |
333 | ||
334 | get_random_bytes(&req->param.starting_psn, 4); | |
335 | req->param.starting_psn &= 0xffffff; | |
336 | ||
337 | /* | |
338 | * Pick some arbitrary defaults here; we could make these | |
339 | * module parameters if anyone cared about setting them. | |
340 | */ | |
341 | req->param.responder_resources = 4; | |
342 | req->param.remote_cm_response_timeout = 20; | |
343 | req->param.local_cm_response_timeout = 20; | |
344 | req->param.retry_count = 7; | |
345 | req->param.rnr_retry_count = 7; | |
346 | req->param.max_cm_retries = 15; | |
347 | ||
348 | req->priv.opcode = SRP_LOGIN_REQ; | |
349 | req->priv.tag = 0; | |
74b0a15b | 350 | req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); |
aef9ec39 RD |
351 | req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | |
352 | SRP_BUF_FORMAT_INDIRECT); | |
0c0450db | 353 | /* |
3cd96564 | 354 | * In the published SRP specification (draft rev. 16a), the |
0c0450db R |
355 | * port identifier format is 8 bytes of ID extension followed |
356 | * by 8 bytes of GUID. Older drafts put the two halves in the | |
357 | * opposite order, so that the GUID comes first. | |
358 | * | |
359 | * Targets conforming to these obsolete drafts can be | |
360 | * recognized by the I/O Class they report. | |
361 | */ | |
362 | if (target->io_class == SRP_REV10_IB_IO_CLASS) { | |
363 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb | 364 | &target->path.sgid.global.interface_id, 8); |
0c0450db | 365 | memcpy(req->priv.initiator_port_id + 8, |
01cb9bcb | 366 | &target->initiator_ext, 8); |
0c0450db R |
367 | memcpy(req->priv.target_port_id, &target->ioc_guid, 8); |
368 | memcpy(req->priv.target_port_id + 8, &target->id_ext, 8); | |
369 | } else { | |
370 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb IR |
371 | &target->initiator_ext, 8); |
372 | memcpy(req->priv.initiator_port_id + 8, | |
373 | &target->path.sgid.global.interface_id, 8); | |
0c0450db R |
374 | memcpy(req->priv.target_port_id, &target->id_ext, 8); |
375 | memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); | |
376 | } | |
377 | ||
aef9ec39 RD |
378 | /* |
379 | * Topspin/Cisco SRP targets will reject our login unless we | |
01cb9bcb IR |
380 | * zero out the first 8 bytes of our initiator port ID and set |
381 | * the second 8 bytes to the local node GUID. | |
aef9ec39 | 382 | */ |
5d7cbfd6 | 383 | if (srp_target_is_topspin(target)) { |
7aa54bd7 DD |
384 | shost_printk(KERN_DEBUG, target->scsi_host, |
385 | PFX "Topspin/Cisco initiator port ID workaround " | |
386 | "activated for target GUID %016llx\n", | |
387 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
aef9ec39 | 388 | memset(req->priv.initiator_port_id, 0, 8); |
01cb9bcb IR |
389 | memcpy(req->priv.initiator_port_id + 8, |
390 | &target->srp_host->dev->dev->node_guid, 8); | |
aef9ec39 | 391 | } |
aef9ec39 RD |
392 | |
393 | status = ib_send_cm_req(target->cm_id, &req->param); | |
394 | ||
395 | kfree(req); | |
396 | ||
397 | return status; | |
398 | } | |
399 | ||
400 | static void srp_disconnect_target(struct srp_target_port *target) | |
401 | { | |
402 | /* XXX should send SRP_I_LOGOUT request */ | |
403 | ||
404 | init_completion(&target->done); | |
e6581056 | 405 | if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { |
7aa54bd7 DD |
406 | shost_printk(KERN_DEBUG, target->scsi_host, |
407 | PFX "Sending CM DREQ failed\n"); | |
e6581056 RD |
408 | return; |
409 | } | |
aef9ec39 RD |
410 | wait_for_completion(&target->done); |
411 | } | |
412 | ||
c4028958 | 413 | static void srp_remove_work(struct work_struct *work) |
aef9ec39 | 414 | { |
c4028958 DH |
415 | struct srp_target_port *target = |
416 | container_of(work, struct srp_target_port, work); | |
aef9ec39 RD |
417 | |
418 | spin_lock_irq(target->scsi_host->host_lock); | |
419 | if (target->state != SRP_TARGET_DEAD) { | |
420 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 RD |
421 | return; |
422 | } | |
423 | target->state = SRP_TARGET_REMOVED; | |
424 | spin_unlock_irq(target->scsi_host->host_lock); | |
425 | ||
b3589fd4 | 426 | spin_lock(&target->srp_host->target_lock); |
aef9ec39 | 427 | list_del(&target->list); |
b3589fd4 | 428 | spin_unlock(&target->srp_host->target_lock); |
aef9ec39 | 429 | |
3236822b | 430 | srp_remove_host(target->scsi_host); |
aef9ec39 RD |
431 | scsi_remove_host(target->scsi_host); |
432 | ib_destroy_cm_id(target->cm_id); | |
433 | srp_free_target_ib(target); | |
434 | scsi_host_put(target->scsi_host); | |
aef9ec39 RD |
435 | } |
436 | ||
437 | static int srp_connect_target(struct srp_target_port *target) | |
438 | { | |
439 | int ret; | |
440 | ||
441 | ret = srp_lookup_path(target); | |
442 | if (ret) | |
443 | return ret; | |
444 | ||
445 | while (1) { | |
446 | init_completion(&target->done); | |
447 | ret = srp_send_req(target); | |
448 | if (ret) | |
449 | return ret; | |
450 | wait_for_completion(&target->done); | |
451 | ||
452 | /* | |
453 | * The CM event handling code will set status to | |
454 | * SRP_PORT_REDIRECT if we get a port redirect REJ | |
455 | * back, or SRP_DLID_REDIRECT if we get a lid/qp | |
456 | * redirect REJ back. | |
457 | */ | |
458 | switch (target->status) { | |
459 | case 0: | |
460 | return 0; | |
461 | ||
462 | case SRP_PORT_REDIRECT: | |
463 | ret = srp_lookup_path(target); | |
464 | if (ret) | |
465 | return ret; | |
466 | break; | |
467 | ||
468 | case SRP_DLID_REDIRECT: | |
469 | break; | |
470 | ||
471 | default: | |
472 | return target->status; | |
473 | } | |
474 | } | |
475 | } | |
476 | ||
d945e1df RD |
477 | static void srp_unmap_data(struct scsi_cmnd *scmnd, |
478 | struct srp_target_port *target, | |
479 | struct srp_request *req) | |
480 | { | |
bb350d1d | 481 | if (!scsi_sglist(scmnd) || |
d945e1df RD |
482 | (scmnd->sc_data_direction != DMA_TO_DEVICE && |
483 | scmnd->sc_data_direction != DMA_FROM_DEVICE)) | |
484 | return; | |
485 | ||
f5358a17 RD |
486 | if (req->fmr) { |
487 | ib_fmr_pool_unmap(req->fmr); | |
488 | req->fmr = NULL; | |
489 | } | |
490 | ||
bb350d1d FT |
491 | ib_dma_unmap_sg(target->srp_host->dev->dev, scsi_sglist(scmnd), |
492 | scsi_sg_count(scmnd), scmnd->sc_data_direction); | |
d945e1df RD |
493 | } |
494 | ||
526b4caa IR |
495 | static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) |
496 | { | |
497 | srp_unmap_data(req->scmnd, target, req); | |
498 | list_move_tail(&req->list, &target->free_reqs); | |
499 | } | |
500 | ||
501 | static void srp_reset_req(struct srp_target_port *target, struct srp_request *req) | |
502 | { | |
503 | req->scmnd->result = DID_RESET << 16; | |
504 | req->scmnd->scsi_done(req->scmnd); | |
505 | srp_remove_req(target, req); | |
506 | } | |
507 | ||
aef9ec39 RD |
508 | static int srp_reconnect_target(struct srp_target_port *target) |
509 | { | |
510 | struct ib_cm_id *new_cm_id; | |
511 | struct ib_qp_attr qp_attr; | |
526b4caa | 512 | struct srp_request *req, *tmp; |
aef9ec39 RD |
513 | struct ib_wc wc; |
514 | int ret; | |
aef9ec39 RD |
515 | |
516 | spin_lock_irq(target->scsi_host->host_lock); | |
517 | if (target->state != SRP_TARGET_LIVE) { | |
518 | spin_unlock_irq(target->scsi_host->host_lock); | |
519 | return -EAGAIN; | |
520 | } | |
521 | target->state = SRP_TARGET_CONNECTING; | |
522 | spin_unlock_irq(target->scsi_host->host_lock); | |
523 | ||
524 | srp_disconnect_target(target); | |
525 | /* | |
526 | * Now get a new local CM ID so that we avoid confusing the | |
527 | * target in case things are really fouled up. | |
528 | */ | |
f5358a17 | 529 | new_cm_id = ib_create_cm_id(target->srp_host->dev->dev, |
aef9ec39 RD |
530 | srp_cm_handler, target); |
531 | if (IS_ERR(new_cm_id)) { | |
532 | ret = PTR_ERR(new_cm_id); | |
533 | goto err; | |
534 | } | |
535 | ib_destroy_cm_id(target->cm_id); | |
536 | target->cm_id = new_cm_id; | |
537 | ||
538 | qp_attr.qp_state = IB_QPS_RESET; | |
539 | ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); | |
540 | if (ret) | |
541 | goto err; | |
542 | ||
543 | ret = srp_init_qp(target, target->qp); | |
544 | if (ret) | |
545 | goto err; | |
546 | ||
547 | while (ib_poll_cq(target->cq, 1, &wc) > 0) | |
548 | ; /* nothing */ | |
549 | ||
d916a8f1 | 550 | spin_lock_irq(target->scsi_host->host_lock); |
526b4caa IR |
551 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) |
552 | srp_reset_req(target, req); | |
d916a8f1 | 553 | spin_unlock_irq(target->scsi_host->host_lock); |
aef9ec39 RD |
554 | |
555 | target->rx_head = 0; | |
556 | target->tx_head = 0; | |
557 | target->tx_tail = 0; | |
aef9ec39 | 558 | |
1033ff67 | 559 | target->qp_in_error = 0; |
aef9ec39 RD |
560 | ret = srp_connect_target(target); |
561 | if (ret) | |
562 | goto err; | |
563 | ||
564 | spin_lock_irq(target->scsi_host->host_lock); | |
565 | if (target->state == SRP_TARGET_CONNECTING) { | |
566 | ret = 0; | |
567 | target->state = SRP_TARGET_LIVE; | |
568 | } else | |
569 | ret = -EAGAIN; | |
570 | spin_unlock_irq(target->scsi_host->host_lock); | |
571 | ||
572 | return ret; | |
573 | ||
574 | err: | |
7aa54bd7 DD |
575 | shost_printk(KERN_ERR, target->scsi_host, |
576 | PFX "reconnect failed (%d), removing target port.\n", ret); | |
aef9ec39 RD |
577 | |
578 | /* | |
579 | * We couldn't reconnect, so kill our target port off. | |
580 | * However, we have to defer the real removal because we might | |
581 | * be in the context of the SCSI error handler now, which | |
582 | * would deadlock if we call scsi_remove_host(). | |
583 | */ | |
584 | spin_lock_irq(target->scsi_host->host_lock); | |
585 | if (target->state == SRP_TARGET_CONNECTING) { | |
586 | target->state = SRP_TARGET_DEAD; | |
c4028958 | 587 | INIT_WORK(&target->work, srp_remove_work); |
aef9ec39 RD |
588 | schedule_work(&target->work); |
589 | } | |
590 | spin_unlock_irq(target->scsi_host->host_lock); | |
591 | ||
592 | return ret; | |
593 | } | |
594 | ||
559ce8f1 | 595 | static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat, |
f5358a17 RD |
596 | int sg_cnt, struct srp_request *req, |
597 | struct srp_direct_buf *buf) | |
598 | { | |
599 | u64 io_addr = 0; | |
600 | u64 *dma_pages; | |
601 | u32 len; | |
602 | int page_cnt; | |
603 | int i, j; | |
604 | int ret; | |
559ce8f1 | 605 | struct srp_device *dev = target->srp_host->dev; |
85507bcc | 606 | struct ib_device *ibdev = dev->dev; |
bb350d1d | 607 | struct scatterlist *sg; |
f5358a17 RD |
608 | |
609 | if (!dev->fmr_pool) | |
610 | return -ENODEV; | |
611 | ||
5d7cbfd6 RD |
612 | if (srp_target_is_mellanox(target) && |
613 | (ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask)) | |
559ce8f1 IR |
614 | return -EINVAL; |
615 | ||
f5358a17 | 616 | len = page_cnt = 0; |
bb350d1d FT |
617 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
618 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 619 | |
bb350d1d | 620 | if (ib_sg_dma_address(ibdev, sg) & ~dev->fmr_page_mask) { |
f5358a17 RD |
621 | if (i > 0) |
622 | return -EINVAL; | |
623 | else | |
624 | ++page_cnt; | |
625 | } | |
bb350d1d | 626 | if ((ib_sg_dma_address(ibdev, sg) + dma_len) & |
f5358a17 RD |
627 | ~dev->fmr_page_mask) { |
628 | if (i < sg_cnt - 1) | |
629 | return -EINVAL; | |
630 | else | |
631 | ++page_cnt; | |
632 | } | |
633 | ||
85507bcc | 634 | len += dma_len; |
f5358a17 RD |
635 | } |
636 | ||
637 | page_cnt += len >> dev->fmr_page_shift; | |
638 | if (page_cnt > SRP_FMR_SIZE) | |
639 | return -ENOMEM; | |
640 | ||
641 | dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); | |
642 | if (!dma_pages) | |
643 | return -ENOMEM; | |
644 | ||
645 | page_cnt = 0; | |
bb350d1d FT |
646 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
647 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc RC |
648 | |
649 | for (j = 0; j < dma_len; j += dev->fmr_page_size) | |
f5358a17 | 650 | dma_pages[page_cnt++] = |
bb350d1d | 651 | (ib_sg_dma_address(ibdev, sg) & |
85507bcc RC |
652 | dev->fmr_page_mask) + j; |
653 | } | |
f5358a17 RD |
654 | |
655 | req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, | |
adfaa888 | 656 | dma_pages, page_cnt, io_addr); |
f5358a17 RD |
657 | if (IS_ERR(req->fmr)) { |
658 | ret = PTR_ERR(req->fmr); | |
6583eb3d | 659 | req->fmr = NULL; |
f5358a17 RD |
660 | goto out; |
661 | } | |
662 | ||
85507bcc RC |
663 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) & |
664 | ~dev->fmr_page_mask); | |
f5358a17 RD |
665 | buf->key = cpu_to_be32(req->fmr->fmr->rkey); |
666 | buf->len = cpu_to_be32(len); | |
667 | ||
668 | ret = 0; | |
669 | ||
670 | out: | |
671 | kfree(dma_pages); | |
672 | ||
673 | return ret; | |
674 | } | |
675 | ||
aef9ec39 RD |
676 | static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, |
677 | struct srp_request *req) | |
678 | { | |
cf368713 | 679 | struct scatterlist *scat; |
aef9ec39 | 680 | struct srp_cmd *cmd = req->cmd->buf; |
cf368713 | 681 | int len, nents, count; |
f5358a17 | 682 | u8 fmt = SRP_DATA_DESC_DIRECT; |
85507bcc RC |
683 | struct srp_device *dev; |
684 | struct ib_device *ibdev; | |
aef9ec39 | 685 | |
bb350d1d | 686 | if (!scsi_sglist(scmnd) || scmnd->sc_data_direction == DMA_NONE) |
aef9ec39 RD |
687 | return sizeof (struct srp_cmd); |
688 | ||
689 | if (scmnd->sc_data_direction != DMA_FROM_DEVICE && | |
690 | scmnd->sc_data_direction != DMA_TO_DEVICE) { | |
7aa54bd7 DD |
691 | shost_printk(KERN_WARNING, target->scsi_host, |
692 | PFX "Unhandled data direction %d\n", | |
693 | scmnd->sc_data_direction); | |
aef9ec39 RD |
694 | return -EINVAL; |
695 | } | |
696 | ||
bb350d1d FT |
697 | nents = scsi_sg_count(scmnd); |
698 | scat = scsi_sglist(scmnd); | |
aef9ec39 | 699 | |
85507bcc RC |
700 | dev = target->srp_host->dev; |
701 | ibdev = dev->dev; | |
702 | ||
703 | count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction); | |
f5358a17 RD |
704 | |
705 | fmt = SRP_DATA_DESC_DIRECT; | |
706 | len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); | |
aef9ec39 | 707 | |
cf368713 | 708 | if (count == 1) { |
f5358a17 RD |
709 | /* |
710 | * The midlayer only generated a single gather/scatter | |
711 | * entry, or DMA mapping coalesced everything to a | |
712 | * single entry. So a direct descriptor along with | |
713 | * the DMA MR suffices. | |
714 | */ | |
cf368713 | 715 | struct srp_direct_buf *buf = (void *) cmd->add_data; |
aef9ec39 | 716 | |
85507bcc RC |
717 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat)); |
718 | buf->key = cpu_to_be32(dev->mr->rkey); | |
719 | buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat)); | |
559ce8f1 | 720 | } else if (srp_map_fmr(target, scat, count, req, |
f5358a17 RD |
721 | (void *) cmd->add_data)) { |
722 | /* | |
723 | * FMR mapping failed, and the scatterlist has more | |
724 | * than one entry. Generate an indirect memory | |
725 | * descriptor. | |
726 | */ | |
cf368713 | 727 | struct srp_indirect_buf *buf = (void *) cmd->add_data; |
bb350d1d | 728 | struct scatterlist *sg; |
cf368713 | 729 | u32 datalen = 0; |
f5358a17 | 730 | int i; |
aef9ec39 | 731 | |
cf368713 | 732 | fmt = SRP_DATA_DESC_INDIRECT; |
f5358a17 RD |
733 | len = sizeof (struct srp_cmd) + |
734 | sizeof (struct srp_indirect_buf) + | |
735 | count * sizeof (struct srp_direct_buf); | |
736 | ||
bb350d1d FT |
737 | scsi_for_each_sg(scmnd, sg, count, i) { |
738 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 739 | |
f5358a17 | 740 | buf->desc_list[i].va = |
bb350d1d | 741 | cpu_to_be64(ib_sg_dma_address(ibdev, sg)); |
f5358a17 | 742 | buf->desc_list[i].key = |
85507bcc RC |
743 | cpu_to_be32(dev->mr->rkey); |
744 | buf->desc_list[i].len = cpu_to_be32(dma_len); | |
745 | datalen += dma_len; | |
f5358a17 | 746 | } |
aef9ec39 | 747 | |
cf368713 RD |
748 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) |
749 | cmd->data_out_desc_cnt = count; | |
750 | else | |
751 | cmd->data_in_desc_cnt = count; | |
752 | ||
f5358a17 RD |
753 | buf->table_desc.va = |
754 | cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); | |
cf368713 | 755 | buf->table_desc.key = |
f5358a17 | 756 | cpu_to_be32(target->srp_host->dev->mr->rkey); |
cf368713 RD |
757 | buf->table_desc.len = |
758 | cpu_to_be32(count * sizeof (struct srp_direct_buf)); | |
759 | ||
cf368713 | 760 | buf->len = cpu_to_be32(datalen); |
aef9ec39 RD |
761 | } |
762 | ||
763 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) | |
764 | cmd->buf_fmt = fmt << 4; | |
765 | else | |
766 | cmd->buf_fmt = fmt; | |
767 | ||
aef9ec39 RD |
768 | return len; |
769 | } | |
770 | ||
aef9ec39 RD |
771 | static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) |
772 | { | |
773 | struct srp_request *req; | |
774 | struct scsi_cmnd *scmnd; | |
775 | unsigned long flags; | |
776 | s32 delta; | |
777 | ||
778 | delta = (s32) be32_to_cpu(rsp->req_lim_delta); | |
779 | ||
780 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
781 | ||
782 | target->req_lim += delta; | |
783 | ||
784 | req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT]; | |
785 | ||
786 | if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { | |
787 | if (be32_to_cpu(rsp->resp_data_len) < 4) | |
788 | req->tsk_status = -1; | |
789 | else | |
790 | req->tsk_status = rsp->data[3]; | |
791 | complete(&req->done); | |
792 | } else { | |
d945e1df | 793 | scmnd = req->scmnd; |
aef9ec39 | 794 | if (!scmnd) |
7aa54bd7 DD |
795 | shost_printk(KERN_ERR, target->scsi_host, |
796 | "Null scmnd for RSP w/tag %016llx\n", | |
797 | (unsigned long long) rsp->tag); | |
aef9ec39 RD |
798 | scmnd->result = rsp->status; |
799 | ||
800 | if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { | |
801 | memcpy(scmnd->sense_buffer, rsp->data + | |
802 | be32_to_cpu(rsp->resp_data_len), | |
803 | min_t(int, be32_to_cpu(rsp->sense_data_len), | |
804 | SCSI_SENSE_BUFFERSIZE)); | |
805 | } | |
806 | ||
807 | if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) | |
bb350d1d | 808 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt)); |
aef9ec39 | 809 | else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) |
bb350d1d | 810 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt)); |
aef9ec39 | 811 | |
aef9ec39 | 812 | if (!req->tsk_mgmt) { |
aef9ec39 RD |
813 | scmnd->host_scribble = (void *) -1L; |
814 | scmnd->scsi_done(scmnd); | |
815 | ||
d945e1df | 816 | srp_remove_req(target, req); |
aef9ec39 RD |
817 | } else |
818 | req->cmd_done = 1; | |
819 | } | |
820 | ||
821 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
822 | } | |
823 | ||
aef9ec39 RD |
824 | static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) |
825 | { | |
85507bcc | 826 | struct ib_device *dev; |
aef9ec39 RD |
827 | struct srp_iu *iu; |
828 | u8 opcode; | |
829 | ||
830 | iu = target->rx_ring[wc->wr_id & ~SRP_OP_RECV]; | |
831 | ||
85507bcc RC |
832 | dev = target->srp_host->dev->dev; |
833 | ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len, | |
834 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
835 | |
836 | opcode = *(u8 *) iu->buf; | |
837 | ||
838 | if (0) { | |
839 | int i; | |
840 | ||
7aa54bd7 DD |
841 | shost_printk(KERN_ERR, target->scsi_host, |
842 | PFX "recv completion, opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
843 | |
844 | for (i = 0; i < wc->byte_len; ++i) { | |
845 | if (i % 8 == 0) | |
846 | printk(KERN_ERR " [%02x] ", i); | |
847 | printk(" %02x", ((u8 *) iu->buf)[i]); | |
848 | if ((i + 1) % 8 == 0) | |
849 | printk("\n"); | |
850 | } | |
851 | ||
852 | if (wc->byte_len % 8) | |
853 | printk("\n"); | |
854 | } | |
855 | ||
856 | switch (opcode) { | |
857 | case SRP_RSP: | |
858 | srp_process_rsp(target, iu->buf); | |
859 | break; | |
860 | ||
861 | case SRP_T_LOGOUT: | |
862 | /* XXX Handle target logout */ | |
7aa54bd7 DD |
863 | shost_printk(KERN_WARNING, target->scsi_host, |
864 | PFX "Got target logout request\n"); | |
aef9ec39 RD |
865 | break; |
866 | ||
867 | default: | |
7aa54bd7 DD |
868 | shost_printk(KERN_WARNING, target->scsi_host, |
869 | PFX "Unhandled SRP opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
870 | break; |
871 | } | |
872 | ||
85507bcc RC |
873 | ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len, |
874 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
875 | } |
876 | ||
877 | static void srp_completion(struct ib_cq *cq, void *target_ptr) | |
878 | { | |
879 | struct srp_target_port *target = target_ptr; | |
880 | struct ib_wc wc; | |
aef9ec39 RD |
881 | |
882 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
883 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
884 | if (wc.status) { | |
7aa54bd7 DD |
885 | shost_printk(KERN_ERR, target->scsi_host, |
886 | PFX "failed %s status %d\n", | |
887 | wc.wr_id & SRP_OP_RECV ? "receive" : "send", | |
888 | wc.status); | |
1033ff67 | 889 | target->qp_in_error = 1; |
aef9ec39 RD |
890 | break; |
891 | } | |
892 | ||
893 | if (wc.wr_id & SRP_OP_RECV) | |
894 | srp_handle_recv(target, &wc); | |
895 | else | |
896 | ++target->tx_tail; | |
897 | } | |
898 | } | |
899 | ||
900 | static int __srp_post_recv(struct srp_target_port *target) | |
901 | { | |
902 | struct srp_iu *iu; | |
903 | struct ib_sge list; | |
904 | struct ib_recv_wr wr, *bad_wr; | |
905 | unsigned int next; | |
906 | int ret; | |
907 | ||
908 | next = target->rx_head & (SRP_RQ_SIZE - 1); | |
909 | wr.wr_id = next | SRP_OP_RECV; | |
910 | iu = target->rx_ring[next]; | |
911 | ||
912 | list.addr = iu->dma; | |
913 | list.length = iu->size; | |
f5358a17 | 914 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
915 | |
916 | wr.next = NULL; | |
917 | wr.sg_list = &list; | |
918 | wr.num_sge = 1; | |
919 | ||
920 | ret = ib_post_recv(target->qp, &wr, &bad_wr); | |
921 | if (!ret) | |
922 | ++target->rx_head; | |
923 | ||
924 | return ret; | |
925 | } | |
926 | ||
927 | static int srp_post_recv(struct srp_target_port *target) | |
928 | { | |
929 | unsigned long flags; | |
930 | int ret; | |
931 | ||
932 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
933 | ret = __srp_post_recv(target); | |
934 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
935 | ||
936 | return ret; | |
937 | } | |
938 | ||
939 | /* | |
940 | * Must be called with target->scsi_host->host_lock held to protect | |
47f2bce9 RD |
941 | * req_lim and tx_head. Lock cannot be dropped between call here and |
942 | * call to __srp_post_send(). | |
aef9ec39 | 943 | */ |
8cba2077 DD |
944 | static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target, |
945 | enum srp_request_type req_type) | |
aef9ec39 | 946 | { |
8cba2077 DD |
947 | s32 min = (req_type == SRP_REQ_TASK_MGMT) ? 1 : 2; |
948 | ||
aef9ec39 RD |
949 | if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) |
950 | return NULL; | |
951 | ||
8cba2077 | 952 | if (target->req_lim < min) { |
6bfa24fa | 953 | ++target->zero_req_lim; |
8cba2077 DD |
954 | return NULL; |
955 | } | |
47f2bce9 | 956 | |
aef9ec39 RD |
957 | return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; |
958 | } | |
959 | ||
960 | /* | |
961 | * Must be called with target->scsi_host->host_lock held to protect | |
962 | * req_lim and tx_head. | |
963 | */ | |
964 | static int __srp_post_send(struct srp_target_port *target, | |
965 | struct srp_iu *iu, int len) | |
966 | { | |
967 | struct ib_sge list; | |
968 | struct ib_send_wr wr, *bad_wr; | |
969 | int ret = 0; | |
970 | ||
aef9ec39 RD |
971 | list.addr = iu->dma; |
972 | list.length = len; | |
f5358a17 | 973 | list.lkey = target->srp_host->dev->mr->lkey; |
aef9ec39 RD |
974 | |
975 | wr.next = NULL; | |
976 | wr.wr_id = target->tx_head & SRP_SQ_SIZE; | |
977 | wr.sg_list = &list; | |
978 | wr.num_sge = 1; | |
979 | wr.opcode = IB_WR_SEND; | |
980 | wr.send_flags = IB_SEND_SIGNALED; | |
981 | ||
982 | ret = ib_post_send(target->qp, &wr, &bad_wr); | |
983 | ||
984 | if (!ret) { | |
985 | ++target->tx_head; | |
986 | --target->req_lim; | |
987 | } | |
988 | ||
989 | return ret; | |
990 | } | |
991 | ||
992 | static int srp_queuecommand(struct scsi_cmnd *scmnd, | |
993 | void (*done)(struct scsi_cmnd *)) | |
994 | { | |
995 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
996 | struct srp_request *req; | |
997 | struct srp_iu *iu; | |
998 | struct srp_cmd *cmd; | |
85507bcc | 999 | struct ib_device *dev; |
aef9ec39 RD |
1000 | int len; |
1001 | ||
1002 | if (target->state == SRP_TARGET_CONNECTING) | |
1003 | goto err; | |
1004 | ||
1005 | if (target->state == SRP_TARGET_DEAD || | |
1006 | target->state == SRP_TARGET_REMOVED) { | |
1007 | scmnd->result = DID_BAD_TARGET << 16; | |
1008 | done(scmnd); | |
1009 | return 0; | |
1010 | } | |
1011 | ||
8cba2077 | 1012 | iu = __srp_get_tx_iu(target, SRP_REQ_NORMAL); |
aef9ec39 RD |
1013 | if (!iu) |
1014 | goto err; | |
1015 | ||
85507bcc RC |
1016 | dev = target->srp_host->dev->dev; |
1017 | ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len, | |
1018 | DMA_TO_DEVICE); | |
aef9ec39 | 1019 | |
d945e1df | 1020 | req = list_entry(target->free_reqs.next, struct srp_request, list); |
aef9ec39 RD |
1021 | |
1022 | scmnd->scsi_done = done; | |
1023 | scmnd->result = 0; | |
d945e1df | 1024 | scmnd->host_scribble = (void *) (long) req->index; |
aef9ec39 RD |
1025 | |
1026 | cmd = iu->buf; | |
1027 | memset(cmd, 0, sizeof *cmd); | |
1028 | ||
1029 | cmd->opcode = SRP_CMD; | |
1030 | cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); | |
d945e1df | 1031 | cmd->tag = req->index; |
aef9ec39 RD |
1032 | memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); |
1033 | ||
aef9ec39 RD |
1034 | req->scmnd = scmnd; |
1035 | req->cmd = iu; | |
1036 | req->cmd_done = 0; | |
1037 | req->tsk_mgmt = NULL; | |
1038 | ||
1039 | len = srp_map_data(scmnd, target, req); | |
1040 | if (len < 0) { | |
7aa54bd7 DD |
1041 | shost_printk(KERN_ERR, target->scsi_host, |
1042 | PFX "Failed to map data\n"); | |
aef9ec39 RD |
1043 | goto err; |
1044 | } | |
1045 | ||
1046 | if (__srp_post_recv(target)) { | |
7aa54bd7 | 1047 | shost_printk(KERN_ERR, target->scsi_host, PFX "Recv failed\n"); |
aef9ec39 RD |
1048 | goto err_unmap; |
1049 | } | |
1050 | ||
85507bcc RC |
1051 | ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len, |
1052 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1053 | |
1054 | if (__srp_post_send(target, iu, len)) { | |
7aa54bd7 | 1055 | shost_printk(KERN_ERR, target->scsi_host, PFX "Send failed\n"); |
aef9ec39 RD |
1056 | goto err_unmap; |
1057 | } | |
1058 | ||
d945e1df | 1059 | list_move_tail(&req->list, &target->req_queue); |
aef9ec39 RD |
1060 | |
1061 | return 0; | |
1062 | ||
1063 | err_unmap: | |
1064 | srp_unmap_data(scmnd, target, req); | |
1065 | ||
1066 | err: | |
1067 | return SCSI_MLQUEUE_HOST_BUSY; | |
1068 | } | |
1069 | ||
1070 | static int srp_alloc_iu_bufs(struct srp_target_port *target) | |
1071 | { | |
1072 | int i; | |
1073 | ||
1074 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1075 | target->rx_ring[i] = srp_alloc_iu(target->srp_host, | |
1076 | target->max_ti_iu_len, | |
1077 | GFP_KERNEL, DMA_FROM_DEVICE); | |
1078 | if (!target->rx_ring[i]) | |
1079 | goto err; | |
1080 | } | |
1081 | ||
1082 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1083 | target->tx_ring[i] = srp_alloc_iu(target->srp_host, | |
74b0a15b | 1084 | srp_max_iu_len, |
aef9ec39 RD |
1085 | GFP_KERNEL, DMA_TO_DEVICE); |
1086 | if (!target->tx_ring[i]) | |
1087 | goto err; | |
1088 | } | |
1089 | ||
1090 | return 0; | |
1091 | ||
1092 | err: | |
1093 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1094 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
1095 | target->rx_ring[i] = NULL; | |
1096 | } | |
1097 | ||
1098 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1099 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
1100 | target->tx_ring[i] = NULL; | |
1101 | } | |
1102 | ||
1103 | return -ENOMEM; | |
1104 | } | |
1105 | ||
1106 | static void srp_cm_rej_handler(struct ib_cm_id *cm_id, | |
1107 | struct ib_cm_event *event, | |
1108 | struct srp_target_port *target) | |
1109 | { | |
7aa54bd7 | 1110 | struct Scsi_Host *shost = target->scsi_host; |
aef9ec39 RD |
1111 | struct ib_class_port_info *cpi; |
1112 | int opcode; | |
1113 | ||
1114 | switch (event->param.rej_rcvd.reason) { | |
1115 | case IB_CM_REJ_PORT_CM_REDIRECT: | |
1116 | cpi = event->param.rej_rcvd.ari; | |
1117 | target->path.dlid = cpi->redirect_lid; | |
1118 | target->path.pkey = cpi->redirect_pkey; | |
1119 | cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; | |
1120 | memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); | |
1121 | ||
1122 | target->status = target->path.dlid ? | |
1123 | SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; | |
1124 | break; | |
1125 | ||
1126 | case IB_CM_REJ_PORT_REDIRECT: | |
5d7cbfd6 | 1127 | if (srp_target_is_topspin(target)) { |
aef9ec39 RD |
1128 | /* |
1129 | * Topspin/Cisco SRP gateways incorrectly send | |
1130 | * reject reason code 25 when they mean 24 | |
1131 | * (port redirect). | |
1132 | */ | |
1133 | memcpy(target->path.dgid.raw, | |
1134 | event->param.rej_rcvd.ari, 16); | |
1135 | ||
7aa54bd7 DD |
1136 | shost_printk(KERN_DEBUG, shost, |
1137 | PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", | |
1138 | (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), | |
1139 | (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); | |
aef9ec39 RD |
1140 | |
1141 | target->status = SRP_PORT_REDIRECT; | |
1142 | } else { | |
7aa54bd7 DD |
1143 | shost_printk(KERN_WARNING, shost, |
1144 | " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); | |
aef9ec39 RD |
1145 | target->status = -ECONNRESET; |
1146 | } | |
1147 | break; | |
1148 | ||
1149 | case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: | |
7aa54bd7 DD |
1150 | shost_printk(KERN_WARNING, shost, |
1151 | " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); | |
aef9ec39 RD |
1152 | target->status = -ECONNRESET; |
1153 | break; | |
1154 | ||
1155 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1156 | opcode = *(u8 *) event->private_data; | |
1157 | if (opcode == SRP_LOGIN_REJ) { | |
1158 | struct srp_login_rej *rej = event->private_data; | |
1159 | u32 reason = be32_to_cpu(rej->reason); | |
1160 | ||
1161 | if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) | |
7aa54bd7 DD |
1162 | shost_printk(KERN_WARNING, shost, |
1163 | PFX "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); | |
aef9ec39 | 1164 | else |
7aa54bd7 DD |
1165 | shost_printk(KERN_WARNING, shost, |
1166 | PFX "SRP LOGIN REJECTED, reason 0x%08x\n", reason); | |
aef9ec39 | 1167 | } else |
7aa54bd7 DD |
1168 | shost_printk(KERN_WARNING, shost, |
1169 | " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," | |
1170 | " opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
1171 | target->status = -ECONNRESET; |
1172 | break; | |
1173 | ||
1174 | default: | |
7aa54bd7 DD |
1175 | shost_printk(KERN_WARNING, shost, " REJ reason 0x%x\n", |
1176 | event->param.rej_rcvd.reason); | |
aef9ec39 RD |
1177 | target->status = -ECONNRESET; |
1178 | } | |
1179 | } | |
1180 | ||
1181 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
1182 | { | |
1183 | struct srp_target_port *target = cm_id->context; | |
1184 | struct ib_qp_attr *qp_attr = NULL; | |
1185 | int attr_mask = 0; | |
1186 | int comp = 0; | |
1187 | int opcode = 0; | |
1188 | ||
1189 | switch (event->event) { | |
1190 | case IB_CM_REQ_ERROR: | |
7aa54bd7 DD |
1191 | shost_printk(KERN_DEBUG, target->scsi_host, |
1192 | PFX "Sending CM REQ failed\n"); | |
aef9ec39 RD |
1193 | comp = 1; |
1194 | target->status = -ECONNRESET; | |
1195 | break; | |
1196 | ||
1197 | case IB_CM_REP_RECEIVED: | |
1198 | comp = 1; | |
1199 | opcode = *(u8 *) event->private_data; | |
1200 | ||
1201 | if (opcode == SRP_LOGIN_RSP) { | |
1202 | struct srp_login_rsp *rsp = event->private_data; | |
1203 | ||
1204 | target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); | |
1205 | target->req_lim = be32_to_cpu(rsp->req_lim_delta); | |
1206 | ||
1207 | target->scsi_host->can_queue = min(target->req_lim, | |
1208 | target->scsi_host->can_queue); | |
1209 | } else { | |
7aa54bd7 DD |
1210 | shost_printk(KERN_WARNING, target->scsi_host, |
1211 | PFX "Unhandled RSP opcode %#x\n", opcode); | |
aef9ec39 RD |
1212 | target->status = -ECONNRESET; |
1213 | break; | |
1214 | } | |
1215 | ||
d2fcea7d VP |
1216 | if (!target->rx_ring[0]) { |
1217 | target->status = srp_alloc_iu_bufs(target); | |
1218 | if (target->status) | |
1219 | break; | |
1220 | } | |
aef9ec39 RD |
1221 | |
1222 | qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); | |
1223 | if (!qp_attr) { | |
1224 | target->status = -ENOMEM; | |
1225 | break; | |
1226 | } | |
1227 | ||
1228 | qp_attr->qp_state = IB_QPS_RTR; | |
1229 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1230 | if (target->status) | |
1231 | break; | |
1232 | ||
1233 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1234 | if (target->status) | |
1235 | break; | |
1236 | ||
1237 | target->status = srp_post_recv(target); | |
1238 | if (target->status) | |
1239 | break; | |
1240 | ||
1241 | qp_attr->qp_state = IB_QPS_RTS; | |
1242 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1243 | if (target->status) | |
1244 | break; | |
1245 | ||
1246 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1247 | if (target->status) | |
1248 | break; | |
1249 | ||
1250 | target->status = ib_send_cm_rtu(cm_id, NULL, 0); | |
1251 | if (target->status) | |
1252 | break; | |
1253 | ||
1254 | break; | |
1255 | ||
1256 | case IB_CM_REJ_RECEIVED: | |
7aa54bd7 | 1257 | shost_printk(KERN_DEBUG, target->scsi_host, PFX "REJ received\n"); |
aef9ec39 RD |
1258 | comp = 1; |
1259 | ||
1260 | srp_cm_rej_handler(cm_id, event, target); | |
1261 | break; | |
1262 | ||
b7ac4ab4 | 1263 | case IB_CM_DREQ_RECEIVED: |
7aa54bd7 DD |
1264 | shost_printk(KERN_WARNING, target->scsi_host, |
1265 | PFX "DREQ received - connection closed\n"); | |
b7ac4ab4 | 1266 | if (ib_send_cm_drep(cm_id, NULL, 0)) |
7aa54bd7 DD |
1267 | shost_printk(KERN_ERR, target->scsi_host, |
1268 | PFX "Sending CM DREP failed\n"); | |
aef9ec39 RD |
1269 | break; |
1270 | ||
1271 | case IB_CM_TIMEWAIT_EXIT: | |
7aa54bd7 DD |
1272 | shost_printk(KERN_ERR, target->scsi_host, |
1273 | PFX "connection closed\n"); | |
aef9ec39 RD |
1274 | |
1275 | comp = 1; | |
1276 | target->status = 0; | |
1277 | break; | |
1278 | ||
b7ac4ab4 IR |
1279 | case IB_CM_MRA_RECEIVED: |
1280 | case IB_CM_DREQ_ERROR: | |
1281 | case IB_CM_DREP_RECEIVED: | |
1282 | break; | |
1283 | ||
aef9ec39 | 1284 | default: |
7aa54bd7 DD |
1285 | shost_printk(KERN_WARNING, target->scsi_host, |
1286 | PFX "Unhandled CM event %d\n", event->event); | |
aef9ec39 RD |
1287 | break; |
1288 | } | |
1289 | ||
1290 | if (comp) | |
1291 | complete(&target->done); | |
1292 | ||
1293 | kfree(qp_attr); | |
1294 | ||
1295 | return 0; | |
1296 | } | |
1297 | ||
d945e1df RD |
1298 | static int srp_send_tsk_mgmt(struct srp_target_port *target, |
1299 | struct srp_request *req, u8 func) | |
aef9ec39 | 1300 | { |
aef9ec39 RD |
1301 | struct srp_iu *iu; |
1302 | struct srp_tsk_mgmt *tsk_mgmt; | |
aef9ec39 RD |
1303 | |
1304 | spin_lock_irq(target->scsi_host->host_lock); | |
1305 | ||
1285b3a0 RD |
1306 | if (target->state == SRP_TARGET_DEAD || |
1307 | target->state == SRP_TARGET_REMOVED) { | |
d945e1df | 1308 | req->scmnd->result = DID_BAD_TARGET << 16; |
1285b3a0 RD |
1309 | goto out; |
1310 | } | |
1311 | ||
aef9ec39 RD |
1312 | init_completion(&req->done); |
1313 | ||
8cba2077 | 1314 | iu = __srp_get_tx_iu(target, SRP_REQ_TASK_MGMT); |
aef9ec39 RD |
1315 | if (!iu) |
1316 | goto out; | |
1317 | ||
1318 | tsk_mgmt = iu->buf; | |
1319 | memset(tsk_mgmt, 0, sizeof *tsk_mgmt); | |
1320 | ||
1321 | tsk_mgmt->opcode = SRP_TSK_MGMT; | |
d945e1df RD |
1322 | tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48); |
1323 | tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT; | |
aef9ec39 | 1324 | tsk_mgmt->tsk_mgmt_func = func; |
d945e1df | 1325 | tsk_mgmt->task_tag = req->index; |
aef9ec39 RD |
1326 | |
1327 | if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) | |
1328 | goto out; | |
1329 | ||
1330 | req->tsk_mgmt = iu; | |
1331 | ||
1332 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df | 1333 | |
aef9ec39 RD |
1334 | if (!wait_for_completion_timeout(&req->done, |
1335 | msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) | |
d945e1df | 1336 | return -1; |
aef9ec39 | 1337 | |
d945e1df | 1338 | return 0; |
aef9ec39 RD |
1339 | |
1340 | out: | |
1341 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df RD |
1342 | return -1; |
1343 | } | |
1344 | ||
1345 | static int srp_find_req(struct srp_target_port *target, | |
1346 | struct scsi_cmnd *scmnd, | |
1347 | struct srp_request **req) | |
1348 | { | |
1349 | if (scmnd->host_scribble == (void *) -1L) | |
1350 | return -1; | |
1351 | ||
1352 | *req = &target->req_ring[(long) scmnd->host_scribble]; | |
1353 | ||
1354 | return 0; | |
aef9ec39 RD |
1355 | } |
1356 | ||
1357 | static int srp_abort(struct scsi_cmnd *scmnd) | |
1358 | { | |
d945e1df RD |
1359 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1360 | struct srp_request *req; | |
1361 | int ret = SUCCESS; | |
1362 | ||
7aa54bd7 | 1363 | shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n"); |
aef9ec39 | 1364 | |
1033ff67 IR |
1365 | if (target->qp_in_error) |
1366 | return FAILED; | |
d945e1df RD |
1367 | if (srp_find_req(target, scmnd, &req)) |
1368 | return FAILED; | |
1369 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK)) | |
1370 | return FAILED; | |
1371 | ||
1372 | spin_lock_irq(target->scsi_host->host_lock); | |
1373 | ||
1374 | if (req->cmd_done) { | |
1375 | srp_remove_req(target, req); | |
1376 | scmnd->scsi_done(scmnd); | |
1377 | } else if (!req->tsk_status) { | |
1378 | srp_remove_req(target, req); | |
1379 | scmnd->result = DID_ABORT << 16; | |
1380 | } else | |
1381 | ret = FAILED; | |
1382 | ||
1383 | spin_unlock_irq(target->scsi_host->host_lock); | |
1384 | ||
1385 | return ret; | |
aef9ec39 RD |
1386 | } |
1387 | ||
1388 | static int srp_reset_device(struct scsi_cmnd *scmnd) | |
1389 | { | |
d945e1df RD |
1390 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1391 | struct srp_request *req, *tmp; | |
1392 | ||
7aa54bd7 | 1393 | shost_printk(KERN_ERR, target->scsi_host, "SRP reset_device called\n"); |
aef9ec39 | 1394 | |
1033ff67 IR |
1395 | if (target->qp_in_error) |
1396 | return FAILED; | |
d945e1df RD |
1397 | if (srp_find_req(target, scmnd, &req)) |
1398 | return FAILED; | |
1399 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET)) | |
1400 | return FAILED; | |
1401 | if (req->tsk_status) | |
1402 | return FAILED; | |
1403 | ||
1404 | spin_lock_irq(target->scsi_host->host_lock); | |
1405 | ||
1406 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) | |
526b4caa IR |
1407 | if (req->scmnd->device == scmnd->device) |
1408 | srp_reset_req(target, req); | |
d945e1df RD |
1409 | |
1410 | spin_unlock_irq(target->scsi_host->host_lock); | |
1411 | ||
1412 | return SUCCESS; | |
aef9ec39 RD |
1413 | } |
1414 | ||
1415 | static int srp_reset_host(struct scsi_cmnd *scmnd) | |
1416 | { | |
1417 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1418 | int ret = FAILED; | |
1419 | ||
7aa54bd7 | 1420 | shost_printk(KERN_ERR, target->scsi_host, PFX "SRP reset_host called\n"); |
aef9ec39 RD |
1421 | |
1422 | if (!srp_reconnect_target(target)) | |
1423 | ret = SUCCESS; | |
1424 | ||
1425 | return ret; | |
1426 | } | |
1427 | ||
6ecb0c84 RD |
1428 | static ssize_t show_id_ext(struct class_device *cdev, char *buf) |
1429 | { | |
1430 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1431 | ||
1432 | if (target->state == SRP_TARGET_DEAD || | |
1433 | target->state == SRP_TARGET_REMOVED) | |
1434 | return -ENODEV; | |
1435 | ||
1436 | return sprintf(buf, "0x%016llx\n", | |
1437 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1438 | } | |
1439 | ||
1440 | static ssize_t show_ioc_guid(struct class_device *cdev, char *buf) | |
1441 | { | |
1442 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1443 | ||
1444 | if (target->state == SRP_TARGET_DEAD || | |
1445 | target->state == SRP_TARGET_REMOVED) | |
1446 | return -ENODEV; | |
1447 | ||
1448 | return sprintf(buf, "0x%016llx\n", | |
1449 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
1450 | } | |
1451 | ||
1452 | static ssize_t show_service_id(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, "0x%016llx\n", | |
1461 | (unsigned long long) be64_to_cpu(target->service_id)); | |
1462 | } | |
1463 | ||
1464 | static ssize_t show_pkey(struct class_device *cdev, char *buf) | |
1465 | { | |
1466 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1467 | ||
1468 | if (target->state == SRP_TARGET_DEAD || | |
1469 | target->state == SRP_TARGET_REMOVED) | |
1470 | return -ENODEV; | |
1471 | ||
1472 | return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); | |
1473 | } | |
1474 | ||
1475 | static ssize_t show_dgid(struct class_device *cdev, char *buf) | |
1476 | { | |
1477 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1478 | ||
1479 | if (target->state == SRP_TARGET_DEAD || | |
1480 | target->state == SRP_TARGET_REMOVED) | |
1481 | return -ENODEV; | |
1482 | ||
1483 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1484 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]), | |
1485 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]), | |
1486 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]), | |
1487 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]), | |
1488 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]), | |
1489 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]), | |
1490 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]), | |
1491 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[7])); | |
1492 | } | |
1493 | ||
3633b3d0 IR |
1494 | static ssize_t show_orig_dgid(struct class_device *cdev, char *buf) |
1495 | { | |
1496 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1497 | ||
1498 | if (target->state == SRP_TARGET_DEAD || | |
1499 | target->state == SRP_TARGET_REMOVED) | |
1500 | return -ENODEV; | |
1501 | ||
1502 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1503 | be16_to_cpu(target->orig_dgid[0]), | |
1504 | be16_to_cpu(target->orig_dgid[1]), | |
1505 | be16_to_cpu(target->orig_dgid[2]), | |
1506 | be16_to_cpu(target->orig_dgid[3]), | |
1507 | be16_to_cpu(target->orig_dgid[4]), | |
1508 | be16_to_cpu(target->orig_dgid[5]), | |
1509 | be16_to_cpu(target->orig_dgid[6]), | |
1510 | be16_to_cpu(target->orig_dgid[7])); | |
1511 | } | |
1512 | ||
6bfa24fa RD |
1513 | static ssize_t show_zero_req_lim(struct class_device *cdev, char *buf) |
1514 | { | |
1515 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1516 | ||
1517 | if (target->state == SRP_TARGET_DEAD || | |
1518 | target->state == SRP_TARGET_REMOVED) | |
1519 | return -ENODEV; | |
1520 | ||
1521 | return sprintf(buf, "%d\n", target->zero_req_lim); | |
1522 | } | |
1523 | ||
ded7f1a1 IR |
1524 | static ssize_t show_local_ib_port(struct class_device *cdev, char *buf) |
1525 | { | |
1526 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1527 | ||
1528 | return sprintf(buf, "%d\n", target->srp_host->port); | |
1529 | } | |
1530 | ||
1531 | static ssize_t show_local_ib_device(struct class_device *cdev, char *buf) | |
1532 | { | |
1533 | struct srp_target_port *target = host_to_target(class_to_shost(cdev)); | |
1534 | ||
1535 | return sprintf(buf, "%s\n", target->srp_host->dev->dev->name); | |
1536 | } | |
1537 | ||
1538 | static CLASS_DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); | |
1539 | static CLASS_DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); | |
1540 | static CLASS_DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); | |
1541 | static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
1542 | static CLASS_DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); | |
3633b3d0 | 1543 | static CLASS_DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL); |
ded7f1a1 IR |
1544 | static CLASS_DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); |
1545 | static CLASS_DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL); | |
1546 | static CLASS_DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL); | |
6ecb0c84 RD |
1547 | |
1548 | static struct class_device_attribute *srp_host_attrs[] = { | |
1549 | &class_device_attr_id_ext, | |
1550 | &class_device_attr_ioc_guid, | |
1551 | &class_device_attr_service_id, | |
1552 | &class_device_attr_pkey, | |
1553 | &class_device_attr_dgid, | |
3633b3d0 | 1554 | &class_device_attr_orig_dgid, |
6bfa24fa | 1555 | &class_device_attr_zero_req_lim, |
ded7f1a1 IR |
1556 | &class_device_attr_local_ib_port, |
1557 | &class_device_attr_local_ib_device, | |
6ecb0c84 RD |
1558 | NULL |
1559 | }; | |
1560 | ||
aef9ec39 RD |
1561 | static struct scsi_host_template srp_template = { |
1562 | .module = THIS_MODULE, | |
b7f008fd RD |
1563 | .name = "InfiniBand SRP initiator", |
1564 | .proc_name = DRV_NAME, | |
aef9ec39 RD |
1565 | .info = srp_target_info, |
1566 | .queuecommand = srp_queuecommand, | |
1567 | .eh_abort_handler = srp_abort, | |
1568 | .eh_device_reset_handler = srp_reset_device, | |
1569 | .eh_host_reset_handler = srp_reset_host, | |
1570 | .can_queue = SRP_SQ_SIZE, | |
1571 | .this_id = -1, | |
aef9ec39 | 1572 | .cmd_per_lun = SRP_SQ_SIZE, |
6ecb0c84 RD |
1573 | .use_clustering = ENABLE_CLUSTERING, |
1574 | .shost_attrs = srp_host_attrs | |
aef9ec39 RD |
1575 | }; |
1576 | ||
1577 | static int srp_add_target(struct srp_host *host, struct srp_target_port *target) | |
1578 | { | |
3236822b FT |
1579 | struct srp_rport_identifiers ids; |
1580 | struct srp_rport *rport; | |
1581 | ||
aef9ec39 RD |
1582 | sprintf(target->target_name, "SRP.T10:%016llX", |
1583 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1584 | ||
f5358a17 | 1585 | if (scsi_add_host(target->scsi_host, host->dev->dev->dma_device)) |
aef9ec39 RD |
1586 | return -ENODEV; |
1587 | ||
3236822b FT |
1588 | memcpy(ids.port_id, &target->id_ext, 8); |
1589 | memcpy(ids.port_id + 8, &target->ioc_guid, 8); | |
aebd5e47 | 1590 | ids.roles = SRP_RPORT_ROLE_TARGET; |
3236822b FT |
1591 | rport = srp_rport_add(target->scsi_host, &ids); |
1592 | if (IS_ERR(rport)) { | |
1593 | scsi_remove_host(target->scsi_host); | |
1594 | return PTR_ERR(rport); | |
1595 | } | |
1596 | ||
b3589fd4 | 1597 | spin_lock(&host->target_lock); |
aef9ec39 | 1598 | list_add_tail(&target->list, &host->target_list); |
b3589fd4 | 1599 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1600 | |
1601 | target->state = SRP_TARGET_LIVE; | |
1602 | ||
aef9ec39 | 1603 | scsi_scan_target(&target->scsi_host->shost_gendev, |
1962a4a1 | 1604 | 0, target->scsi_id, SCAN_WILD_CARD, 0); |
aef9ec39 RD |
1605 | |
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | static void srp_release_class_dev(struct class_device *class_dev) | |
1610 | { | |
1611 | struct srp_host *host = | |
1612 | container_of(class_dev, struct srp_host, class_dev); | |
1613 | ||
1614 | complete(&host->released); | |
1615 | } | |
1616 | ||
1617 | static struct class srp_class = { | |
1618 | .name = "infiniband_srp", | |
1619 | .release = srp_release_class_dev | |
1620 | }; | |
1621 | ||
1622 | /* | |
1623 | * Target ports are added by writing | |
1624 | * | |
1625 | * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, | |
1626 | * pkey=<P_Key>,service_id=<service ID> | |
1627 | * | |
1628 | * to the add_target sysfs attribute. | |
1629 | */ | |
1630 | enum { | |
1631 | SRP_OPT_ERR = 0, | |
1632 | SRP_OPT_ID_EXT = 1 << 0, | |
1633 | SRP_OPT_IOC_GUID = 1 << 1, | |
1634 | SRP_OPT_DGID = 1 << 2, | |
1635 | SRP_OPT_PKEY = 1 << 3, | |
1636 | SRP_OPT_SERVICE_ID = 1 << 4, | |
1637 | SRP_OPT_MAX_SECT = 1 << 5, | |
52fb2b50 | 1638 | SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, |
0c0450db | 1639 | SRP_OPT_IO_CLASS = 1 << 7, |
01cb9bcb | 1640 | SRP_OPT_INITIATOR_EXT = 1 << 8, |
aef9ec39 RD |
1641 | SRP_OPT_ALL = (SRP_OPT_ID_EXT | |
1642 | SRP_OPT_IOC_GUID | | |
1643 | SRP_OPT_DGID | | |
1644 | SRP_OPT_PKEY | | |
1645 | SRP_OPT_SERVICE_ID), | |
1646 | }; | |
1647 | ||
1648 | static match_table_t srp_opt_tokens = { | |
52fb2b50 VP |
1649 | { SRP_OPT_ID_EXT, "id_ext=%s" }, |
1650 | { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, | |
1651 | { SRP_OPT_DGID, "dgid=%s" }, | |
1652 | { SRP_OPT_PKEY, "pkey=%x" }, | |
1653 | { SRP_OPT_SERVICE_ID, "service_id=%s" }, | |
1654 | { SRP_OPT_MAX_SECT, "max_sect=%d" }, | |
1655 | { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, | |
0c0450db | 1656 | { SRP_OPT_IO_CLASS, "io_class=%x" }, |
01cb9bcb | 1657 | { SRP_OPT_INITIATOR_EXT, "initiator_ext=%s" }, |
52fb2b50 | 1658 | { SRP_OPT_ERR, NULL } |
aef9ec39 RD |
1659 | }; |
1660 | ||
1661 | static int srp_parse_options(const char *buf, struct srp_target_port *target) | |
1662 | { | |
1663 | char *options, *sep_opt; | |
1664 | char *p; | |
1665 | char dgid[3]; | |
1666 | substring_t args[MAX_OPT_ARGS]; | |
1667 | int opt_mask = 0; | |
1668 | int token; | |
1669 | int ret = -EINVAL; | |
1670 | int i; | |
1671 | ||
1672 | options = kstrdup(buf, GFP_KERNEL); | |
1673 | if (!options) | |
1674 | return -ENOMEM; | |
1675 | ||
1676 | sep_opt = options; | |
1677 | while ((p = strsep(&sep_opt, ",")) != NULL) { | |
1678 | if (!*p) | |
1679 | continue; | |
1680 | ||
1681 | token = match_token(p, srp_opt_tokens, args); | |
1682 | opt_mask |= token; | |
1683 | ||
1684 | switch (token) { | |
1685 | case SRP_OPT_ID_EXT: | |
1686 | p = match_strdup(args); | |
a20f3a6d IR |
1687 | if (!p) { |
1688 | ret = -ENOMEM; | |
1689 | goto out; | |
1690 | } | |
aef9ec39 RD |
1691 | target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1692 | kfree(p); | |
1693 | break; | |
1694 | ||
1695 | case SRP_OPT_IOC_GUID: | |
1696 | p = match_strdup(args); | |
a20f3a6d IR |
1697 | if (!p) { |
1698 | ret = -ENOMEM; | |
1699 | goto out; | |
1700 | } | |
aef9ec39 RD |
1701 | target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1702 | kfree(p); | |
1703 | break; | |
1704 | ||
1705 | case SRP_OPT_DGID: | |
1706 | p = match_strdup(args); | |
a20f3a6d IR |
1707 | if (!p) { |
1708 | ret = -ENOMEM; | |
1709 | goto out; | |
1710 | } | |
aef9ec39 RD |
1711 | if (strlen(p) != 32) { |
1712 | printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); | |
ce1823f0 | 1713 | kfree(p); |
aef9ec39 RD |
1714 | goto out; |
1715 | } | |
1716 | ||
1717 | for (i = 0; i < 16; ++i) { | |
1718 | strlcpy(dgid, p + i * 2, 3); | |
1719 | target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); | |
1720 | } | |
bf17c1c7 | 1721 | kfree(p); |
3633b3d0 | 1722 | memcpy(target->orig_dgid, target->path.dgid.raw, 16); |
aef9ec39 RD |
1723 | break; |
1724 | ||
1725 | case SRP_OPT_PKEY: | |
1726 | if (match_hex(args, &token)) { | |
1727 | printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); | |
1728 | goto out; | |
1729 | } | |
1730 | target->path.pkey = cpu_to_be16(token); | |
1731 | break; | |
1732 | ||
1733 | case SRP_OPT_SERVICE_ID: | |
1734 | p = match_strdup(args); | |
a20f3a6d IR |
1735 | if (!p) { |
1736 | ret = -ENOMEM; | |
1737 | goto out; | |
1738 | } | |
aef9ec39 | 1739 | target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
247e020e | 1740 | target->path.service_id = target->service_id; |
aef9ec39 RD |
1741 | kfree(p); |
1742 | break; | |
1743 | ||
1744 | case SRP_OPT_MAX_SECT: | |
1745 | if (match_int(args, &token)) { | |
1746 | printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); | |
1747 | goto out; | |
1748 | } | |
1749 | target->scsi_host->max_sectors = token; | |
1750 | break; | |
1751 | ||
52fb2b50 VP |
1752 | case SRP_OPT_MAX_CMD_PER_LUN: |
1753 | if (match_int(args, &token)) { | |
1754 | printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); | |
1755 | goto out; | |
1756 | } | |
1757 | target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); | |
1758 | break; | |
1759 | ||
0c0450db R |
1760 | case SRP_OPT_IO_CLASS: |
1761 | if (match_hex(args, &token)) { | |
1762 | printk(KERN_WARNING PFX "bad IO class parameter '%s' \n", p); | |
1763 | goto out; | |
1764 | } | |
1765 | if (token != SRP_REV10_IB_IO_CLASS && | |
1766 | token != SRP_REV16A_IB_IO_CLASS) { | |
1767 | printk(KERN_WARNING PFX "unknown IO class parameter value" | |
1768 | " %x specified (use %x or %x).\n", | |
1769 | token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); | |
1770 | goto out; | |
1771 | } | |
1772 | target->io_class = token; | |
1773 | break; | |
1774 | ||
01cb9bcb IR |
1775 | case SRP_OPT_INITIATOR_EXT: |
1776 | p = match_strdup(args); | |
a20f3a6d IR |
1777 | if (!p) { |
1778 | ret = -ENOMEM; | |
1779 | goto out; | |
1780 | } | |
01cb9bcb IR |
1781 | target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1782 | kfree(p); | |
1783 | break; | |
1784 | ||
aef9ec39 RD |
1785 | default: |
1786 | printk(KERN_WARNING PFX "unknown parameter or missing value " | |
1787 | "'%s' in target creation request\n", p); | |
1788 | goto out; | |
1789 | } | |
1790 | } | |
1791 | ||
1792 | if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) | |
1793 | ret = 0; | |
1794 | else | |
1795 | for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) | |
1796 | if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && | |
1797 | !(srp_opt_tokens[i].token & opt_mask)) | |
1798 | printk(KERN_WARNING PFX "target creation request is " | |
1799 | "missing parameter '%s'\n", | |
1800 | srp_opt_tokens[i].pattern); | |
1801 | ||
1802 | out: | |
1803 | kfree(options); | |
1804 | return ret; | |
1805 | } | |
1806 | ||
1807 | static ssize_t srp_create_target(struct class_device *class_dev, | |
1808 | const char *buf, size_t count) | |
1809 | { | |
1810 | struct srp_host *host = | |
1811 | container_of(class_dev, struct srp_host, class_dev); | |
1812 | struct Scsi_Host *target_host; | |
1813 | struct srp_target_port *target; | |
1814 | int ret; | |
1815 | int i; | |
1816 | ||
1817 | target_host = scsi_host_alloc(&srp_template, | |
1818 | sizeof (struct srp_target_port)); | |
1819 | if (!target_host) | |
1820 | return -ENOMEM; | |
1821 | ||
3236822b | 1822 | target_host->transportt = ib_srp_transport_template; |
3c8edf0e AR |
1823 | target_host->max_lun = SRP_MAX_LUN; |
1824 | target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; | |
5f068992 | 1825 | |
aef9ec39 | 1826 | target = host_to_target(target_host); |
aef9ec39 | 1827 | |
0c0450db | 1828 | target->io_class = SRP_REV16A_IB_IO_CLASS; |
aef9ec39 RD |
1829 | target->scsi_host = target_host; |
1830 | target->srp_host = host; | |
1831 | ||
d945e1df | 1832 | INIT_LIST_HEAD(&target->free_reqs); |
aef9ec39 | 1833 | INIT_LIST_HEAD(&target->req_queue); |
d945e1df RD |
1834 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
1835 | target->req_ring[i].index = i; | |
1836 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
1837 | } | |
aef9ec39 RD |
1838 | |
1839 | ret = srp_parse_options(buf, target); | |
1840 | if (ret) | |
1841 | goto err; | |
1842 | ||
f5358a17 | 1843 | ib_get_cached_gid(host->dev->dev, host->port, 0, &target->path.sgid); |
aef9ec39 | 1844 | |
7aa54bd7 DD |
1845 | shost_printk(KERN_DEBUG, target->scsi_host, PFX |
1846 | "new target: id_ext %016llx ioc_guid %016llx pkey %04x " | |
1847 | "service_id %016llx dgid %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
aef9ec39 RD |
1848 | (unsigned long long) be64_to_cpu(target->id_ext), |
1849 | (unsigned long long) be64_to_cpu(target->ioc_guid), | |
1850 | be16_to_cpu(target->path.pkey), | |
1851 | (unsigned long long) be64_to_cpu(target->service_id), | |
1852 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[0]), | |
1853 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[2]), | |
1854 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[4]), | |
1855 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[6]), | |
1856 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[8]), | |
1857 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[10]), | |
1858 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[12]), | |
1859 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[14])); | |
1860 | ||
1861 | ret = srp_create_target_ib(target); | |
1862 | if (ret) | |
1863 | goto err; | |
1864 | ||
f5358a17 | 1865 | target->cm_id = ib_create_cm_id(host->dev->dev, srp_cm_handler, target); |
aef9ec39 RD |
1866 | if (IS_ERR(target->cm_id)) { |
1867 | ret = PTR_ERR(target->cm_id); | |
1868 | goto err_free; | |
1869 | } | |
1870 | ||
1033ff67 | 1871 | target->qp_in_error = 0; |
aef9ec39 RD |
1872 | ret = srp_connect_target(target); |
1873 | if (ret) { | |
7aa54bd7 DD |
1874 | shost_printk(KERN_ERR, target->scsi_host, |
1875 | PFX "Connection failed\n"); | |
aef9ec39 RD |
1876 | goto err_cm_id; |
1877 | } | |
1878 | ||
1879 | ret = srp_add_target(host, target); | |
1880 | if (ret) | |
1881 | goto err_disconnect; | |
1882 | ||
1883 | return count; | |
1884 | ||
1885 | err_disconnect: | |
1886 | srp_disconnect_target(target); | |
1887 | ||
1888 | err_cm_id: | |
1889 | ib_destroy_cm_id(target->cm_id); | |
1890 | ||
1891 | err_free: | |
1892 | srp_free_target_ib(target); | |
1893 | ||
1894 | err: | |
1895 | scsi_host_put(target_host); | |
1896 | ||
1897 | return ret; | |
1898 | } | |
1899 | ||
1900 | static CLASS_DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); | |
1901 | ||
1902 | static ssize_t show_ibdev(struct class_device *class_dev, char *buf) | |
1903 | { | |
1904 | struct srp_host *host = | |
1905 | container_of(class_dev, struct srp_host, class_dev); | |
1906 | ||
f5358a17 | 1907 | return sprintf(buf, "%s\n", host->dev->dev->name); |
aef9ec39 RD |
1908 | } |
1909 | ||
1910 | static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); | |
1911 | ||
1912 | static ssize_t show_port(struct class_device *class_dev, char *buf) | |
1913 | { | |
1914 | struct srp_host *host = | |
1915 | container_of(class_dev, struct srp_host, class_dev); | |
1916 | ||
1917 | return sprintf(buf, "%d\n", host->port); | |
1918 | } | |
1919 | ||
1920 | static CLASS_DEVICE_ATTR(port, S_IRUGO, show_port, NULL); | |
1921 | ||
f5358a17 | 1922 | static struct srp_host *srp_add_port(struct srp_device *device, u8 port) |
aef9ec39 RD |
1923 | { |
1924 | struct srp_host *host; | |
1925 | ||
1926 | host = kzalloc(sizeof *host, GFP_KERNEL); | |
1927 | if (!host) | |
1928 | return NULL; | |
1929 | ||
1930 | INIT_LIST_HEAD(&host->target_list); | |
b3589fd4 | 1931 | spin_lock_init(&host->target_lock); |
aef9ec39 RD |
1932 | init_completion(&host->released); |
1933 | host->dev = device; | |
1934 | host->port = port; | |
1935 | ||
aef9ec39 | 1936 | host->class_dev.class = &srp_class; |
f5358a17 | 1937 | host->class_dev.dev = device->dev->dma_device; |
aef9ec39 | 1938 | snprintf(host->class_dev.class_id, BUS_ID_SIZE, "srp-%s-%d", |
f5358a17 | 1939 | device->dev->name, port); |
aef9ec39 RD |
1940 | |
1941 | if (class_device_register(&host->class_dev)) | |
f5358a17 | 1942 | goto free_host; |
aef9ec39 RD |
1943 | if (class_device_create_file(&host->class_dev, &class_device_attr_add_target)) |
1944 | goto err_class; | |
1945 | if (class_device_create_file(&host->class_dev, &class_device_attr_ibdev)) | |
1946 | goto err_class; | |
1947 | if (class_device_create_file(&host->class_dev, &class_device_attr_port)) | |
1948 | goto err_class; | |
1949 | ||
1950 | return host; | |
1951 | ||
1952 | err_class: | |
1953 | class_device_unregister(&host->class_dev); | |
1954 | ||
f5358a17 | 1955 | free_host: |
aef9ec39 RD |
1956 | kfree(host); |
1957 | ||
1958 | return NULL; | |
1959 | } | |
1960 | ||
1961 | static void srp_add_one(struct ib_device *device) | |
1962 | { | |
f5358a17 RD |
1963 | struct srp_device *srp_dev; |
1964 | struct ib_device_attr *dev_attr; | |
1965 | struct ib_fmr_pool_param fmr_param; | |
aef9ec39 | 1966 | struct srp_host *host; |
aef9ec39 RD |
1967 | int s, e, p; |
1968 | ||
f5358a17 RD |
1969 | dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); |
1970 | if (!dev_attr) | |
cf311cd4 | 1971 | return; |
aef9ec39 | 1972 | |
f5358a17 RD |
1973 | if (ib_query_device(device, dev_attr)) { |
1974 | printk(KERN_WARNING PFX "Query device failed for %s\n", | |
1975 | device->name); | |
1976 | goto free_attr; | |
1977 | } | |
1978 | ||
1979 | srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); | |
1980 | if (!srp_dev) | |
1981 | goto free_attr; | |
1982 | ||
1983 | /* | |
1984 | * Use the smallest page size supported by the HCA, down to a | |
1985 | * minimum of 512 bytes (which is the smallest sector that a | |
1986 | * SCSI command will ever carry). | |
1987 | */ | |
1988 | srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); | |
1989 | srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; | |
bf628dc2 | 1990 | srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1); |
f5358a17 RD |
1991 | |
1992 | INIT_LIST_HEAD(&srp_dev->dev_list); | |
1993 | ||
1994 | srp_dev->dev = device; | |
1995 | srp_dev->pd = ib_alloc_pd(device); | |
1996 | if (IS_ERR(srp_dev->pd)) | |
1997 | goto free_dev; | |
1998 | ||
1999 | srp_dev->mr = ib_get_dma_mr(srp_dev->pd, | |
2000 | IB_ACCESS_LOCAL_WRITE | | |
2001 | IB_ACCESS_REMOTE_READ | | |
2002 | IB_ACCESS_REMOTE_WRITE); | |
2003 | if (IS_ERR(srp_dev->mr)) | |
2004 | goto err_pd; | |
2005 | ||
2006 | memset(&fmr_param, 0, sizeof fmr_param); | |
2007 | fmr_param.pool_size = SRP_FMR_POOL_SIZE; | |
2008 | fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; | |
2009 | fmr_param.cache = 1; | |
2010 | fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; | |
2011 | fmr_param.page_shift = srp_dev->fmr_page_shift; | |
2012 | fmr_param.access = (IB_ACCESS_LOCAL_WRITE | | |
2013 | IB_ACCESS_REMOTE_WRITE | | |
2014 | IB_ACCESS_REMOTE_READ); | |
2015 | ||
2016 | srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); | |
2017 | if (IS_ERR(srp_dev->fmr_pool)) | |
2018 | srp_dev->fmr_pool = NULL; | |
aef9ec39 | 2019 | |
07ebafba | 2020 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
aef9ec39 RD |
2021 | s = 0; |
2022 | e = 0; | |
2023 | } else { | |
2024 | s = 1; | |
2025 | e = device->phys_port_cnt; | |
2026 | } | |
2027 | ||
2028 | for (p = s; p <= e; ++p) { | |
f5358a17 | 2029 | host = srp_add_port(srp_dev, p); |
aef9ec39 | 2030 | if (host) |
f5358a17 | 2031 | list_add_tail(&host->list, &srp_dev->dev_list); |
aef9ec39 RD |
2032 | } |
2033 | ||
f5358a17 RD |
2034 | ib_set_client_data(device, &srp_client, srp_dev); |
2035 | ||
2036 | goto free_attr; | |
2037 | ||
2038 | err_pd: | |
2039 | ib_dealloc_pd(srp_dev->pd); | |
2040 | ||
2041 | free_dev: | |
2042 | kfree(srp_dev); | |
2043 | ||
2044 | free_attr: | |
2045 | kfree(dev_attr); | |
aef9ec39 RD |
2046 | } |
2047 | ||
2048 | static void srp_remove_one(struct ib_device *device) | |
2049 | { | |
f5358a17 | 2050 | struct srp_device *srp_dev; |
aef9ec39 RD |
2051 | struct srp_host *host, *tmp_host; |
2052 | LIST_HEAD(target_list); | |
2053 | struct srp_target_port *target, *tmp_target; | |
aef9ec39 | 2054 | |
f5358a17 | 2055 | srp_dev = ib_get_client_data(device, &srp_client); |
aef9ec39 | 2056 | |
f5358a17 | 2057 | list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { |
aef9ec39 RD |
2058 | class_device_unregister(&host->class_dev); |
2059 | /* | |
2060 | * Wait for the sysfs entry to go away, so that no new | |
2061 | * target ports can be created. | |
2062 | */ | |
2063 | wait_for_completion(&host->released); | |
2064 | ||
2065 | /* | |
2066 | * Mark all target ports as removed, so we stop queueing | |
2067 | * commands and don't try to reconnect. | |
2068 | */ | |
b3589fd4 | 2069 | spin_lock(&host->target_lock); |
549c5fc2 | 2070 | list_for_each_entry(target, &host->target_list, list) { |
0c5b3952 IR |
2071 | spin_lock_irq(target->scsi_host->host_lock); |
2072 | target->state = SRP_TARGET_REMOVED; | |
2073 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 | 2074 | } |
b3589fd4 | 2075 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
2076 | |
2077 | /* | |
2078 | * Wait for any reconnection tasks that may have | |
2079 | * started before we marked our target ports as | |
2080 | * removed, and any target port removal tasks. | |
2081 | */ | |
2082 | flush_scheduled_work(); | |
2083 | ||
2084 | list_for_each_entry_safe(target, tmp_target, | |
2085 | &host->target_list, list) { | |
b0e47c8b | 2086 | srp_remove_host(target->scsi_host); |
ad696989 | 2087 | scsi_remove_host(target->scsi_host); |
aef9ec39 RD |
2088 | srp_disconnect_target(target); |
2089 | ib_destroy_cm_id(target->cm_id); | |
2090 | srp_free_target_ib(target); | |
2091 | scsi_host_put(target->scsi_host); | |
2092 | } | |
2093 | ||
aef9ec39 RD |
2094 | kfree(host); |
2095 | } | |
2096 | ||
f5358a17 RD |
2097 | if (srp_dev->fmr_pool) |
2098 | ib_destroy_fmr_pool(srp_dev->fmr_pool); | |
2099 | ib_dereg_mr(srp_dev->mr); | |
2100 | ib_dealloc_pd(srp_dev->pd); | |
2101 | ||
2102 | kfree(srp_dev); | |
aef9ec39 RD |
2103 | } |
2104 | ||
3236822b FT |
2105 | static struct srp_function_template ib_srp_transport_functions = { |
2106 | }; | |
2107 | ||
aef9ec39 RD |
2108 | static int __init srp_init_module(void) |
2109 | { | |
2110 | int ret; | |
2111 | ||
3236822b FT |
2112 | ib_srp_transport_template = |
2113 | srp_attach_transport(&ib_srp_transport_functions); | |
2114 | if (!ib_srp_transport_template) | |
2115 | return -ENOMEM; | |
2116 | ||
74b0a15b VP |
2117 | srp_template.sg_tablesize = srp_sg_tablesize; |
2118 | srp_max_iu_len = (sizeof (struct srp_cmd) + | |
2119 | sizeof (struct srp_indirect_buf) + | |
2120 | srp_sg_tablesize * 16); | |
2121 | ||
aef9ec39 RD |
2122 | ret = class_register(&srp_class); |
2123 | if (ret) { | |
2124 | printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); | |
3236822b | 2125 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2126 | return ret; |
2127 | } | |
2128 | ||
c1a0b23b MT |
2129 | ib_sa_register_client(&srp_sa_client); |
2130 | ||
aef9ec39 RD |
2131 | ret = ib_register_client(&srp_client); |
2132 | if (ret) { | |
2133 | printk(KERN_ERR PFX "couldn't register IB client\n"); | |
3236822b | 2134 | srp_release_transport(ib_srp_transport_template); |
c1a0b23b | 2135 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 RD |
2136 | class_unregister(&srp_class); |
2137 | return ret; | |
2138 | } | |
2139 | ||
2140 | return 0; | |
2141 | } | |
2142 | ||
2143 | static void __exit srp_cleanup_module(void) | |
2144 | { | |
2145 | ib_unregister_client(&srp_client); | |
c1a0b23b | 2146 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 | 2147 | class_unregister(&srp_class); |
3236822b | 2148 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2149 | } |
2150 | ||
2151 | module_init(srp_init_module); | |
2152 | module_exit(srp_cleanup_module); |