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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, | |
1e89a194 | 71 | "Max number of gather/scatter entries per I/O (default is 12, max 255)"); |
74b0a15b | 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 | ||
05321937 GKH |
142 | iu->dma = ib_dma_map_single(host->srp_dev->dev, iu->buf, size, |
143 | direction); | |
144 | if (ib_dma_mapping_error(host->srp_dev->dev, iu->dma)) | |
aef9ec39 RD |
145 | goto out_free_buf; |
146 | ||
147 | iu->size = size; | |
148 | iu->direction = direction; | |
149 | ||
150 | return iu; | |
151 | ||
152 | out_free_buf: | |
153 | kfree(iu->buf); | |
154 | out_free_iu: | |
155 | kfree(iu); | |
156 | out: | |
157 | return NULL; | |
158 | } | |
159 | ||
160 | static void srp_free_iu(struct srp_host *host, struct srp_iu *iu) | |
161 | { | |
162 | if (!iu) | |
163 | return; | |
164 | ||
05321937 GKH |
165 | ib_dma_unmap_single(host->srp_dev->dev, iu->dma, iu->size, |
166 | iu->direction); | |
aef9ec39 RD |
167 | kfree(iu->buf); |
168 | kfree(iu); | |
169 | } | |
170 | ||
171 | static void srp_qp_event(struct ib_event *event, void *context) | |
172 | { | |
173 | printk(KERN_ERR PFX "QP event %d\n", event->event); | |
174 | } | |
175 | ||
176 | static int srp_init_qp(struct srp_target_port *target, | |
177 | struct ib_qp *qp) | |
178 | { | |
179 | struct ib_qp_attr *attr; | |
180 | int ret; | |
181 | ||
182 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
183 | if (!attr) | |
184 | return -ENOMEM; | |
185 | ||
05321937 | 186 | ret = ib_find_cached_pkey(target->srp_host->srp_dev->dev, |
aef9ec39 RD |
187 | target->srp_host->port, |
188 | be16_to_cpu(target->path.pkey), | |
189 | &attr->pkey_index); | |
190 | if (ret) | |
191 | goto out; | |
192 | ||
193 | attr->qp_state = IB_QPS_INIT; | |
194 | attr->qp_access_flags = (IB_ACCESS_REMOTE_READ | | |
195 | IB_ACCESS_REMOTE_WRITE); | |
196 | attr->port_num = target->srp_host->port; | |
197 | ||
198 | ret = ib_modify_qp(qp, attr, | |
199 | IB_QP_STATE | | |
200 | IB_QP_PKEY_INDEX | | |
201 | IB_QP_ACCESS_FLAGS | | |
202 | IB_QP_PORT); | |
203 | ||
204 | out: | |
205 | kfree(attr); | |
206 | return ret; | |
207 | } | |
208 | ||
9fe4bcf4 DD |
209 | static int srp_new_cm_id(struct srp_target_port *target) |
210 | { | |
211 | struct ib_cm_id *new_cm_id; | |
212 | ||
05321937 | 213 | new_cm_id = ib_create_cm_id(target->srp_host->srp_dev->dev, |
9fe4bcf4 DD |
214 | srp_cm_handler, target); |
215 | if (IS_ERR(new_cm_id)) | |
216 | return PTR_ERR(new_cm_id); | |
217 | ||
218 | if (target->cm_id) | |
219 | ib_destroy_cm_id(target->cm_id); | |
220 | target->cm_id = new_cm_id; | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
aef9ec39 RD |
225 | static int srp_create_target_ib(struct srp_target_port *target) |
226 | { | |
227 | struct ib_qp_init_attr *init_attr; | |
228 | int ret; | |
229 | ||
230 | init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); | |
231 | if (!init_attr) | |
232 | return -ENOMEM; | |
233 | ||
05321937 GKH |
234 | target->cq = ib_create_cq(target->srp_host->srp_dev->dev, |
235 | srp_completion, NULL, target, SRP_CQ_SIZE, 0); | |
aef9ec39 RD |
236 | if (IS_ERR(target->cq)) { |
237 | ret = PTR_ERR(target->cq); | |
238 | goto out; | |
239 | } | |
240 | ||
241 | ib_req_notify_cq(target->cq, IB_CQ_NEXT_COMP); | |
242 | ||
243 | init_attr->event_handler = srp_qp_event; | |
244 | init_attr->cap.max_send_wr = SRP_SQ_SIZE; | |
245 | init_attr->cap.max_recv_wr = SRP_RQ_SIZE; | |
246 | init_attr->cap.max_recv_sge = 1; | |
247 | init_attr->cap.max_send_sge = 1; | |
248 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
249 | init_attr->qp_type = IB_QPT_RC; | |
250 | init_attr->send_cq = target->cq; | |
251 | init_attr->recv_cq = target->cq; | |
252 | ||
05321937 | 253 | target->qp = ib_create_qp(target->srp_host->srp_dev->pd, init_attr); |
aef9ec39 RD |
254 | if (IS_ERR(target->qp)) { |
255 | ret = PTR_ERR(target->qp); | |
256 | ib_destroy_cq(target->cq); | |
257 | goto out; | |
258 | } | |
259 | ||
260 | ret = srp_init_qp(target, target->qp); | |
261 | if (ret) { | |
262 | ib_destroy_qp(target->qp); | |
263 | ib_destroy_cq(target->cq); | |
264 | goto out; | |
265 | } | |
266 | ||
267 | out: | |
268 | kfree(init_attr); | |
269 | return ret; | |
270 | } | |
271 | ||
272 | static void srp_free_target_ib(struct srp_target_port *target) | |
273 | { | |
274 | int i; | |
275 | ||
276 | ib_destroy_qp(target->qp); | |
277 | ib_destroy_cq(target->cq); | |
278 | ||
279 | for (i = 0; i < SRP_RQ_SIZE; ++i) | |
280 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
281 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) | |
282 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
283 | } | |
284 | ||
285 | static void srp_path_rec_completion(int status, | |
286 | struct ib_sa_path_rec *pathrec, | |
287 | void *target_ptr) | |
288 | { | |
289 | struct srp_target_port *target = target_ptr; | |
290 | ||
291 | target->status = status; | |
292 | if (status) | |
7aa54bd7 DD |
293 | shost_printk(KERN_ERR, target->scsi_host, |
294 | PFX "Got failed path rec status %d\n", status); | |
aef9ec39 RD |
295 | else |
296 | target->path = *pathrec; | |
297 | complete(&target->done); | |
298 | } | |
299 | ||
300 | static int srp_lookup_path(struct srp_target_port *target) | |
301 | { | |
302 | target->path.numb_path = 1; | |
303 | ||
304 | init_completion(&target->done); | |
305 | ||
c1a0b23b | 306 | target->path_query_id = ib_sa_path_rec_get(&srp_sa_client, |
05321937 | 307 | target->srp_host->srp_dev->dev, |
aef9ec39 RD |
308 | target->srp_host->port, |
309 | &target->path, | |
247e020e | 310 | IB_SA_PATH_REC_SERVICE_ID | |
aef9ec39 RD |
311 | IB_SA_PATH_REC_DGID | |
312 | IB_SA_PATH_REC_SGID | | |
313 | IB_SA_PATH_REC_NUMB_PATH | | |
314 | IB_SA_PATH_REC_PKEY, | |
315 | SRP_PATH_REC_TIMEOUT_MS, | |
316 | GFP_KERNEL, | |
317 | srp_path_rec_completion, | |
318 | target, &target->path_query); | |
319 | if (target->path_query_id < 0) | |
320 | return target->path_query_id; | |
321 | ||
322 | wait_for_completion(&target->done); | |
323 | ||
324 | if (target->status < 0) | |
7aa54bd7 DD |
325 | shost_printk(KERN_WARNING, target->scsi_host, |
326 | PFX "Path record query failed\n"); | |
aef9ec39 RD |
327 | |
328 | return target->status; | |
329 | } | |
330 | ||
331 | static int srp_send_req(struct srp_target_port *target) | |
332 | { | |
333 | struct { | |
334 | struct ib_cm_req_param param; | |
335 | struct srp_login_req priv; | |
336 | } *req = NULL; | |
337 | int status; | |
338 | ||
339 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
340 | if (!req) | |
341 | return -ENOMEM; | |
342 | ||
343 | req->param.primary_path = &target->path; | |
344 | req->param.alternate_path = NULL; | |
345 | req->param.service_id = target->service_id; | |
346 | req->param.qp_num = target->qp->qp_num; | |
347 | req->param.qp_type = target->qp->qp_type; | |
348 | req->param.private_data = &req->priv; | |
349 | req->param.private_data_len = sizeof req->priv; | |
350 | req->param.flow_control = 1; | |
351 | ||
352 | get_random_bytes(&req->param.starting_psn, 4); | |
353 | req->param.starting_psn &= 0xffffff; | |
354 | ||
355 | /* | |
356 | * Pick some arbitrary defaults here; we could make these | |
357 | * module parameters if anyone cared about setting them. | |
358 | */ | |
359 | req->param.responder_resources = 4; | |
360 | req->param.remote_cm_response_timeout = 20; | |
361 | req->param.local_cm_response_timeout = 20; | |
362 | req->param.retry_count = 7; | |
363 | req->param.rnr_retry_count = 7; | |
364 | req->param.max_cm_retries = 15; | |
365 | ||
366 | req->priv.opcode = SRP_LOGIN_REQ; | |
367 | req->priv.tag = 0; | |
74b0a15b | 368 | req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); |
aef9ec39 RD |
369 | req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | |
370 | SRP_BUF_FORMAT_INDIRECT); | |
0c0450db | 371 | /* |
3cd96564 | 372 | * In the published SRP specification (draft rev. 16a), the |
0c0450db R |
373 | * port identifier format is 8 bytes of ID extension followed |
374 | * by 8 bytes of GUID. Older drafts put the two halves in the | |
375 | * opposite order, so that the GUID comes first. | |
376 | * | |
377 | * Targets conforming to these obsolete drafts can be | |
378 | * recognized by the I/O Class they report. | |
379 | */ | |
380 | if (target->io_class == SRP_REV10_IB_IO_CLASS) { | |
381 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb | 382 | &target->path.sgid.global.interface_id, 8); |
0c0450db | 383 | memcpy(req->priv.initiator_port_id + 8, |
01cb9bcb | 384 | &target->initiator_ext, 8); |
0c0450db R |
385 | memcpy(req->priv.target_port_id, &target->ioc_guid, 8); |
386 | memcpy(req->priv.target_port_id + 8, &target->id_ext, 8); | |
387 | } else { | |
388 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb IR |
389 | &target->initiator_ext, 8); |
390 | memcpy(req->priv.initiator_port_id + 8, | |
391 | &target->path.sgid.global.interface_id, 8); | |
0c0450db R |
392 | memcpy(req->priv.target_port_id, &target->id_ext, 8); |
393 | memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); | |
394 | } | |
395 | ||
aef9ec39 RD |
396 | /* |
397 | * Topspin/Cisco SRP targets will reject our login unless we | |
01cb9bcb IR |
398 | * zero out the first 8 bytes of our initiator port ID and set |
399 | * the second 8 bytes to the local node GUID. | |
aef9ec39 | 400 | */ |
5d7cbfd6 | 401 | if (srp_target_is_topspin(target)) { |
7aa54bd7 DD |
402 | shost_printk(KERN_DEBUG, target->scsi_host, |
403 | PFX "Topspin/Cisco initiator port ID workaround " | |
404 | "activated for target GUID %016llx\n", | |
405 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
aef9ec39 | 406 | memset(req->priv.initiator_port_id, 0, 8); |
01cb9bcb | 407 | memcpy(req->priv.initiator_port_id + 8, |
05321937 | 408 | &target->srp_host->srp_dev->dev->node_guid, 8); |
aef9ec39 | 409 | } |
aef9ec39 RD |
410 | |
411 | status = ib_send_cm_req(target->cm_id, &req->param); | |
412 | ||
413 | kfree(req); | |
414 | ||
415 | return status; | |
416 | } | |
417 | ||
418 | static void srp_disconnect_target(struct srp_target_port *target) | |
419 | { | |
420 | /* XXX should send SRP_I_LOGOUT request */ | |
421 | ||
422 | init_completion(&target->done); | |
e6581056 | 423 | if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { |
7aa54bd7 DD |
424 | shost_printk(KERN_DEBUG, target->scsi_host, |
425 | PFX "Sending CM DREQ failed\n"); | |
e6581056 RD |
426 | return; |
427 | } | |
aef9ec39 RD |
428 | wait_for_completion(&target->done); |
429 | } | |
430 | ||
c4028958 | 431 | static void srp_remove_work(struct work_struct *work) |
aef9ec39 | 432 | { |
c4028958 DH |
433 | struct srp_target_port *target = |
434 | container_of(work, struct srp_target_port, work); | |
aef9ec39 RD |
435 | |
436 | spin_lock_irq(target->scsi_host->host_lock); | |
437 | if (target->state != SRP_TARGET_DEAD) { | |
438 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 RD |
439 | return; |
440 | } | |
441 | target->state = SRP_TARGET_REMOVED; | |
442 | spin_unlock_irq(target->scsi_host->host_lock); | |
443 | ||
b3589fd4 | 444 | spin_lock(&target->srp_host->target_lock); |
aef9ec39 | 445 | list_del(&target->list); |
b3589fd4 | 446 | spin_unlock(&target->srp_host->target_lock); |
aef9ec39 | 447 | |
3236822b | 448 | srp_remove_host(target->scsi_host); |
aef9ec39 RD |
449 | scsi_remove_host(target->scsi_host); |
450 | ib_destroy_cm_id(target->cm_id); | |
451 | srp_free_target_ib(target); | |
452 | scsi_host_put(target->scsi_host); | |
aef9ec39 RD |
453 | } |
454 | ||
455 | static int srp_connect_target(struct srp_target_port *target) | |
456 | { | |
9fe4bcf4 | 457 | int retries = 3; |
aef9ec39 RD |
458 | int ret; |
459 | ||
460 | ret = srp_lookup_path(target); | |
461 | if (ret) | |
462 | return ret; | |
463 | ||
464 | while (1) { | |
465 | init_completion(&target->done); | |
466 | ret = srp_send_req(target); | |
467 | if (ret) | |
468 | return ret; | |
469 | wait_for_completion(&target->done); | |
470 | ||
471 | /* | |
472 | * The CM event handling code will set status to | |
473 | * SRP_PORT_REDIRECT if we get a port redirect REJ | |
474 | * back, or SRP_DLID_REDIRECT if we get a lid/qp | |
475 | * redirect REJ back. | |
476 | */ | |
477 | switch (target->status) { | |
478 | case 0: | |
479 | return 0; | |
480 | ||
481 | case SRP_PORT_REDIRECT: | |
482 | ret = srp_lookup_path(target); | |
483 | if (ret) | |
484 | return ret; | |
485 | break; | |
486 | ||
487 | case SRP_DLID_REDIRECT: | |
488 | break; | |
489 | ||
9fe4bcf4 DD |
490 | case SRP_STALE_CONN: |
491 | /* Our current CM id was stale, and is now in timewait. | |
492 | * Try to reconnect with a new one. | |
493 | */ | |
494 | if (!retries-- || srp_new_cm_id(target)) { | |
495 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
496 | "giving up on stale connection\n"); | |
497 | target->status = -ECONNRESET; | |
498 | return target->status; | |
499 | } | |
500 | ||
501 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
502 | "retrying stale connection\n"); | |
503 | break; | |
504 | ||
aef9ec39 RD |
505 | default: |
506 | return target->status; | |
507 | } | |
508 | } | |
509 | } | |
510 | ||
d945e1df RD |
511 | static void srp_unmap_data(struct scsi_cmnd *scmnd, |
512 | struct srp_target_port *target, | |
513 | struct srp_request *req) | |
514 | { | |
bb350d1d | 515 | if (!scsi_sglist(scmnd) || |
d945e1df RD |
516 | (scmnd->sc_data_direction != DMA_TO_DEVICE && |
517 | scmnd->sc_data_direction != DMA_FROM_DEVICE)) | |
518 | return; | |
519 | ||
f5358a17 RD |
520 | if (req->fmr) { |
521 | ib_fmr_pool_unmap(req->fmr); | |
522 | req->fmr = NULL; | |
523 | } | |
524 | ||
05321937 | 525 | ib_dma_unmap_sg(target->srp_host->srp_dev->dev, scsi_sglist(scmnd), |
bb350d1d | 526 | scsi_sg_count(scmnd), scmnd->sc_data_direction); |
d945e1df RD |
527 | } |
528 | ||
526b4caa IR |
529 | static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) |
530 | { | |
531 | srp_unmap_data(req->scmnd, target, req); | |
532 | list_move_tail(&req->list, &target->free_reqs); | |
533 | } | |
534 | ||
535 | static void srp_reset_req(struct srp_target_port *target, struct srp_request *req) | |
536 | { | |
537 | req->scmnd->result = DID_RESET << 16; | |
538 | req->scmnd->scsi_done(req->scmnd); | |
539 | srp_remove_req(target, req); | |
540 | } | |
541 | ||
aef9ec39 RD |
542 | static int srp_reconnect_target(struct srp_target_port *target) |
543 | { | |
aef9ec39 | 544 | struct ib_qp_attr qp_attr; |
526b4caa | 545 | struct srp_request *req, *tmp; |
aef9ec39 RD |
546 | struct ib_wc wc; |
547 | int ret; | |
aef9ec39 RD |
548 | |
549 | spin_lock_irq(target->scsi_host->host_lock); | |
550 | if (target->state != SRP_TARGET_LIVE) { | |
551 | spin_unlock_irq(target->scsi_host->host_lock); | |
552 | return -EAGAIN; | |
553 | } | |
554 | target->state = SRP_TARGET_CONNECTING; | |
555 | spin_unlock_irq(target->scsi_host->host_lock); | |
556 | ||
557 | srp_disconnect_target(target); | |
558 | /* | |
559 | * Now get a new local CM ID so that we avoid confusing the | |
560 | * target in case things are really fouled up. | |
561 | */ | |
9fe4bcf4 DD |
562 | ret = srp_new_cm_id(target); |
563 | if (ret) | |
aef9ec39 | 564 | goto err; |
aef9ec39 RD |
565 | |
566 | qp_attr.qp_state = IB_QPS_RESET; | |
567 | ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); | |
568 | if (ret) | |
569 | goto err; | |
570 | ||
571 | ret = srp_init_qp(target, target->qp); | |
572 | if (ret) | |
573 | goto err; | |
574 | ||
575 | while (ib_poll_cq(target->cq, 1, &wc) > 0) | |
576 | ; /* nothing */ | |
577 | ||
d916a8f1 | 578 | spin_lock_irq(target->scsi_host->host_lock); |
526b4caa IR |
579 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) |
580 | srp_reset_req(target, req); | |
d916a8f1 | 581 | spin_unlock_irq(target->scsi_host->host_lock); |
aef9ec39 RD |
582 | |
583 | target->rx_head = 0; | |
584 | target->tx_head = 0; | |
585 | target->tx_tail = 0; | |
aef9ec39 | 586 | |
1033ff67 | 587 | target->qp_in_error = 0; |
aef9ec39 RD |
588 | ret = srp_connect_target(target); |
589 | if (ret) | |
590 | goto err; | |
591 | ||
592 | spin_lock_irq(target->scsi_host->host_lock); | |
593 | if (target->state == SRP_TARGET_CONNECTING) { | |
594 | ret = 0; | |
595 | target->state = SRP_TARGET_LIVE; | |
596 | } else | |
597 | ret = -EAGAIN; | |
598 | spin_unlock_irq(target->scsi_host->host_lock); | |
599 | ||
600 | return ret; | |
601 | ||
602 | err: | |
7aa54bd7 DD |
603 | shost_printk(KERN_ERR, target->scsi_host, |
604 | PFX "reconnect failed (%d), removing target port.\n", ret); | |
aef9ec39 RD |
605 | |
606 | /* | |
607 | * We couldn't reconnect, so kill our target port off. | |
608 | * However, we have to defer the real removal because we might | |
609 | * be in the context of the SCSI error handler now, which | |
610 | * would deadlock if we call scsi_remove_host(). | |
611 | */ | |
612 | spin_lock_irq(target->scsi_host->host_lock); | |
613 | if (target->state == SRP_TARGET_CONNECTING) { | |
614 | target->state = SRP_TARGET_DEAD; | |
c4028958 | 615 | INIT_WORK(&target->work, srp_remove_work); |
aef9ec39 RD |
616 | schedule_work(&target->work); |
617 | } | |
618 | spin_unlock_irq(target->scsi_host->host_lock); | |
619 | ||
620 | return ret; | |
621 | } | |
622 | ||
559ce8f1 | 623 | static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat, |
f5358a17 RD |
624 | int sg_cnt, struct srp_request *req, |
625 | struct srp_direct_buf *buf) | |
626 | { | |
627 | u64 io_addr = 0; | |
628 | u64 *dma_pages; | |
629 | u32 len; | |
630 | int page_cnt; | |
631 | int i, j; | |
632 | int ret; | |
05321937 | 633 | struct srp_device *dev = target->srp_host->srp_dev; |
85507bcc | 634 | struct ib_device *ibdev = dev->dev; |
bb350d1d | 635 | struct scatterlist *sg; |
f5358a17 RD |
636 | |
637 | if (!dev->fmr_pool) | |
638 | return -ENODEV; | |
639 | ||
5d7cbfd6 RD |
640 | if (srp_target_is_mellanox(target) && |
641 | (ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask)) | |
559ce8f1 IR |
642 | return -EINVAL; |
643 | ||
f5358a17 | 644 | len = page_cnt = 0; |
bb350d1d FT |
645 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
646 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 647 | |
bb350d1d | 648 | if (ib_sg_dma_address(ibdev, sg) & ~dev->fmr_page_mask) { |
f5358a17 RD |
649 | if (i > 0) |
650 | return -EINVAL; | |
651 | else | |
652 | ++page_cnt; | |
653 | } | |
bb350d1d | 654 | if ((ib_sg_dma_address(ibdev, sg) + dma_len) & |
f5358a17 RD |
655 | ~dev->fmr_page_mask) { |
656 | if (i < sg_cnt - 1) | |
657 | return -EINVAL; | |
658 | else | |
659 | ++page_cnt; | |
660 | } | |
661 | ||
85507bcc | 662 | len += dma_len; |
f5358a17 RD |
663 | } |
664 | ||
665 | page_cnt += len >> dev->fmr_page_shift; | |
666 | if (page_cnt > SRP_FMR_SIZE) | |
667 | return -ENOMEM; | |
668 | ||
669 | dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); | |
670 | if (!dma_pages) | |
671 | return -ENOMEM; | |
672 | ||
673 | page_cnt = 0; | |
bb350d1d FT |
674 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
675 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc RC |
676 | |
677 | for (j = 0; j < dma_len; j += dev->fmr_page_size) | |
f5358a17 | 678 | dma_pages[page_cnt++] = |
bb350d1d | 679 | (ib_sg_dma_address(ibdev, sg) & |
85507bcc RC |
680 | dev->fmr_page_mask) + j; |
681 | } | |
f5358a17 RD |
682 | |
683 | req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, | |
adfaa888 | 684 | dma_pages, page_cnt, io_addr); |
f5358a17 RD |
685 | if (IS_ERR(req->fmr)) { |
686 | ret = PTR_ERR(req->fmr); | |
6583eb3d | 687 | req->fmr = NULL; |
f5358a17 RD |
688 | goto out; |
689 | } | |
690 | ||
85507bcc RC |
691 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) & |
692 | ~dev->fmr_page_mask); | |
f5358a17 RD |
693 | buf->key = cpu_to_be32(req->fmr->fmr->rkey); |
694 | buf->len = cpu_to_be32(len); | |
695 | ||
696 | ret = 0; | |
697 | ||
698 | out: | |
699 | kfree(dma_pages); | |
700 | ||
701 | return ret; | |
702 | } | |
703 | ||
aef9ec39 RD |
704 | static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, |
705 | struct srp_request *req) | |
706 | { | |
cf368713 | 707 | struct scatterlist *scat; |
aef9ec39 | 708 | struct srp_cmd *cmd = req->cmd->buf; |
cf368713 | 709 | int len, nents, count; |
f5358a17 | 710 | u8 fmt = SRP_DATA_DESC_DIRECT; |
85507bcc RC |
711 | struct srp_device *dev; |
712 | struct ib_device *ibdev; | |
aef9ec39 | 713 | |
bb350d1d | 714 | if (!scsi_sglist(scmnd) || scmnd->sc_data_direction == DMA_NONE) |
aef9ec39 RD |
715 | return sizeof (struct srp_cmd); |
716 | ||
717 | if (scmnd->sc_data_direction != DMA_FROM_DEVICE && | |
718 | scmnd->sc_data_direction != DMA_TO_DEVICE) { | |
7aa54bd7 DD |
719 | shost_printk(KERN_WARNING, target->scsi_host, |
720 | PFX "Unhandled data direction %d\n", | |
721 | scmnd->sc_data_direction); | |
aef9ec39 RD |
722 | return -EINVAL; |
723 | } | |
724 | ||
bb350d1d FT |
725 | nents = scsi_sg_count(scmnd); |
726 | scat = scsi_sglist(scmnd); | |
aef9ec39 | 727 | |
05321937 | 728 | dev = target->srp_host->srp_dev; |
85507bcc RC |
729 | ibdev = dev->dev; |
730 | ||
731 | count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction); | |
f5358a17 RD |
732 | |
733 | fmt = SRP_DATA_DESC_DIRECT; | |
734 | len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); | |
aef9ec39 | 735 | |
cf368713 | 736 | if (count == 1) { |
f5358a17 RD |
737 | /* |
738 | * The midlayer only generated a single gather/scatter | |
739 | * entry, or DMA mapping coalesced everything to a | |
740 | * single entry. So a direct descriptor along with | |
741 | * the DMA MR suffices. | |
742 | */ | |
cf368713 | 743 | struct srp_direct_buf *buf = (void *) cmd->add_data; |
aef9ec39 | 744 | |
85507bcc RC |
745 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat)); |
746 | buf->key = cpu_to_be32(dev->mr->rkey); | |
747 | buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat)); | |
559ce8f1 | 748 | } else if (srp_map_fmr(target, scat, count, req, |
f5358a17 RD |
749 | (void *) cmd->add_data)) { |
750 | /* | |
751 | * FMR mapping failed, and the scatterlist has more | |
752 | * than one entry. Generate an indirect memory | |
753 | * descriptor. | |
754 | */ | |
cf368713 | 755 | struct srp_indirect_buf *buf = (void *) cmd->add_data; |
bb350d1d | 756 | struct scatterlist *sg; |
cf368713 | 757 | u32 datalen = 0; |
f5358a17 | 758 | int i; |
aef9ec39 | 759 | |
cf368713 | 760 | fmt = SRP_DATA_DESC_INDIRECT; |
f5358a17 RD |
761 | len = sizeof (struct srp_cmd) + |
762 | sizeof (struct srp_indirect_buf) + | |
763 | count * sizeof (struct srp_direct_buf); | |
764 | ||
bb350d1d FT |
765 | scsi_for_each_sg(scmnd, sg, count, i) { |
766 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 767 | |
f5358a17 | 768 | buf->desc_list[i].va = |
bb350d1d | 769 | cpu_to_be64(ib_sg_dma_address(ibdev, sg)); |
f5358a17 | 770 | buf->desc_list[i].key = |
85507bcc RC |
771 | cpu_to_be32(dev->mr->rkey); |
772 | buf->desc_list[i].len = cpu_to_be32(dma_len); | |
773 | datalen += dma_len; | |
f5358a17 | 774 | } |
aef9ec39 | 775 | |
cf368713 RD |
776 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) |
777 | cmd->data_out_desc_cnt = count; | |
778 | else | |
779 | cmd->data_in_desc_cnt = count; | |
780 | ||
f5358a17 RD |
781 | buf->table_desc.va = |
782 | cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); | |
cf368713 | 783 | buf->table_desc.key = |
05321937 | 784 | cpu_to_be32(target->srp_host->srp_dev->mr->rkey); |
cf368713 RD |
785 | buf->table_desc.len = |
786 | cpu_to_be32(count * sizeof (struct srp_direct_buf)); | |
787 | ||
cf368713 | 788 | buf->len = cpu_to_be32(datalen); |
aef9ec39 RD |
789 | } |
790 | ||
791 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) | |
792 | cmd->buf_fmt = fmt << 4; | |
793 | else | |
794 | cmd->buf_fmt = fmt; | |
795 | ||
aef9ec39 RD |
796 | return len; |
797 | } | |
798 | ||
aef9ec39 RD |
799 | static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) |
800 | { | |
801 | struct srp_request *req; | |
802 | struct scsi_cmnd *scmnd; | |
803 | unsigned long flags; | |
804 | s32 delta; | |
805 | ||
806 | delta = (s32) be32_to_cpu(rsp->req_lim_delta); | |
807 | ||
808 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
809 | ||
810 | target->req_lim += delta; | |
811 | ||
812 | req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT]; | |
813 | ||
814 | if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { | |
815 | if (be32_to_cpu(rsp->resp_data_len) < 4) | |
816 | req->tsk_status = -1; | |
817 | else | |
818 | req->tsk_status = rsp->data[3]; | |
819 | complete(&req->done); | |
820 | } else { | |
d945e1df | 821 | scmnd = req->scmnd; |
aef9ec39 | 822 | if (!scmnd) |
7aa54bd7 DD |
823 | shost_printk(KERN_ERR, target->scsi_host, |
824 | "Null scmnd for RSP w/tag %016llx\n", | |
825 | (unsigned long long) rsp->tag); | |
aef9ec39 RD |
826 | scmnd->result = rsp->status; |
827 | ||
828 | if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { | |
829 | memcpy(scmnd->sense_buffer, rsp->data + | |
830 | be32_to_cpu(rsp->resp_data_len), | |
831 | min_t(int, be32_to_cpu(rsp->sense_data_len), | |
832 | SCSI_SENSE_BUFFERSIZE)); | |
833 | } | |
834 | ||
835 | if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) | |
bb350d1d | 836 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt)); |
aef9ec39 | 837 | else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) |
bb350d1d | 838 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt)); |
aef9ec39 | 839 | |
aef9ec39 | 840 | if (!req->tsk_mgmt) { |
aef9ec39 RD |
841 | scmnd->host_scribble = (void *) -1L; |
842 | scmnd->scsi_done(scmnd); | |
843 | ||
d945e1df | 844 | srp_remove_req(target, req); |
aef9ec39 RD |
845 | } else |
846 | req->cmd_done = 1; | |
847 | } | |
848 | ||
849 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
850 | } | |
851 | ||
aef9ec39 RD |
852 | static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) |
853 | { | |
85507bcc | 854 | struct ib_device *dev; |
aef9ec39 RD |
855 | struct srp_iu *iu; |
856 | u8 opcode; | |
857 | ||
858 | iu = target->rx_ring[wc->wr_id & ~SRP_OP_RECV]; | |
859 | ||
05321937 | 860 | dev = target->srp_host->srp_dev->dev; |
85507bcc RC |
861 | ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len, |
862 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
863 | |
864 | opcode = *(u8 *) iu->buf; | |
865 | ||
866 | if (0) { | |
867 | int i; | |
868 | ||
7aa54bd7 DD |
869 | shost_printk(KERN_ERR, target->scsi_host, |
870 | PFX "recv completion, opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
871 | |
872 | for (i = 0; i < wc->byte_len; ++i) { | |
873 | if (i % 8 == 0) | |
874 | printk(KERN_ERR " [%02x] ", i); | |
875 | printk(" %02x", ((u8 *) iu->buf)[i]); | |
876 | if ((i + 1) % 8 == 0) | |
877 | printk("\n"); | |
878 | } | |
879 | ||
880 | if (wc->byte_len % 8) | |
881 | printk("\n"); | |
882 | } | |
883 | ||
884 | switch (opcode) { | |
885 | case SRP_RSP: | |
886 | srp_process_rsp(target, iu->buf); | |
887 | break; | |
888 | ||
889 | case SRP_T_LOGOUT: | |
890 | /* XXX Handle target logout */ | |
7aa54bd7 DD |
891 | shost_printk(KERN_WARNING, target->scsi_host, |
892 | PFX "Got target logout request\n"); | |
aef9ec39 RD |
893 | break; |
894 | ||
895 | default: | |
7aa54bd7 DD |
896 | shost_printk(KERN_WARNING, target->scsi_host, |
897 | PFX "Unhandled SRP opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
898 | break; |
899 | } | |
900 | ||
85507bcc RC |
901 | ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len, |
902 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
903 | } |
904 | ||
905 | static void srp_completion(struct ib_cq *cq, void *target_ptr) | |
906 | { | |
907 | struct srp_target_port *target = target_ptr; | |
908 | struct ib_wc wc; | |
aef9ec39 RD |
909 | |
910 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
911 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
912 | if (wc.status) { | |
7aa54bd7 DD |
913 | shost_printk(KERN_ERR, target->scsi_host, |
914 | PFX "failed %s status %d\n", | |
915 | wc.wr_id & SRP_OP_RECV ? "receive" : "send", | |
916 | wc.status); | |
1033ff67 | 917 | target->qp_in_error = 1; |
aef9ec39 RD |
918 | break; |
919 | } | |
920 | ||
921 | if (wc.wr_id & SRP_OP_RECV) | |
922 | srp_handle_recv(target, &wc); | |
923 | else | |
924 | ++target->tx_tail; | |
925 | } | |
926 | } | |
927 | ||
928 | static int __srp_post_recv(struct srp_target_port *target) | |
929 | { | |
930 | struct srp_iu *iu; | |
931 | struct ib_sge list; | |
932 | struct ib_recv_wr wr, *bad_wr; | |
933 | unsigned int next; | |
934 | int ret; | |
935 | ||
936 | next = target->rx_head & (SRP_RQ_SIZE - 1); | |
937 | wr.wr_id = next | SRP_OP_RECV; | |
938 | iu = target->rx_ring[next]; | |
939 | ||
940 | list.addr = iu->dma; | |
941 | list.length = iu->size; | |
05321937 | 942 | list.lkey = target->srp_host->srp_dev->mr->lkey; |
aef9ec39 RD |
943 | |
944 | wr.next = NULL; | |
945 | wr.sg_list = &list; | |
946 | wr.num_sge = 1; | |
947 | ||
948 | ret = ib_post_recv(target->qp, &wr, &bad_wr); | |
949 | if (!ret) | |
950 | ++target->rx_head; | |
951 | ||
952 | return ret; | |
953 | } | |
954 | ||
955 | static int srp_post_recv(struct srp_target_port *target) | |
956 | { | |
957 | unsigned long flags; | |
958 | int ret; | |
959 | ||
960 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
961 | ret = __srp_post_recv(target); | |
962 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
963 | ||
964 | return ret; | |
965 | } | |
966 | ||
967 | /* | |
968 | * Must be called with target->scsi_host->host_lock held to protect | |
47f2bce9 RD |
969 | * req_lim and tx_head. Lock cannot be dropped between call here and |
970 | * call to __srp_post_send(). | |
aef9ec39 | 971 | */ |
8cba2077 DD |
972 | static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target, |
973 | enum srp_request_type req_type) | |
aef9ec39 | 974 | { |
8cba2077 DD |
975 | s32 min = (req_type == SRP_REQ_TASK_MGMT) ? 1 : 2; |
976 | ||
aef9ec39 RD |
977 | if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) |
978 | return NULL; | |
979 | ||
8cba2077 | 980 | if (target->req_lim < min) { |
6bfa24fa | 981 | ++target->zero_req_lim; |
8cba2077 DD |
982 | return NULL; |
983 | } | |
47f2bce9 | 984 | |
aef9ec39 RD |
985 | return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; |
986 | } | |
987 | ||
988 | /* | |
989 | * Must be called with target->scsi_host->host_lock held to protect | |
990 | * req_lim and tx_head. | |
991 | */ | |
992 | static int __srp_post_send(struct srp_target_port *target, | |
993 | struct srp_iu *iu, int len) | |
994 | { | |
995 | struct ib_sge list; | |
996 | struct ib_send_wr wr, *bad_wr; | |
997 | int ret = 0; | |
998 | ||
aef9ec39 RD |
999 | list.addr = iu->dma; |
1000 | list.length = len; | |
05321937 | 1001 | list.lkey = target->srp_host->srp_dev->mr->lkey; |
aef9ec39 RD |
1002 | |
1003 | wr.next = NULL; | |
1004 | wr.wr_id = target->tx_head & SRP_SQ_SIZE; | |
1005 | wr.sg_list = &list; | |
1006 | wr.num_sge = 1; | |
1007 | wr.opcode = IB_WR_SEND; | |
1008 | wr.send_flags = IB_SEND_SIGNALED; | |
1009 | ||
1010 | ret = ib_post_send(target->qp, &wr, &bad_wr); | |
1011 | ||
1012 | if (!ret) { | |
1013 | ++target->tx_head; | |
1014 | --target->req_lim; | |
1015 | } | |
1016 | ||
1017 | return ret; | |
1018 | } | |
1019 | ||
1020 | static int srp_queuecommand(struct scsi_cmnd *scmnd, | |
1021 | void (*done)(struct scsi_cmnd *)) | |
1022 | { | |
1023 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1024 | struct srp_request *req; | |
1025 | struct srp_iu *iu; | |
1026 | struct srp_cmd *cmd; | |
85507bcc | 1027 | struct ib_device *dev; |
aef9ec39 RD |
1028 | int len; |
1029 | ||
1030 | if (target->state == SRP_TARGET_CONNECTING) | |
1031 | goto err; | |
1032 | ||
1033 | if (target->state == SRP_TARGET_DEAD || | |
1034 | target->state == SRP_TARGET_REMOVED) { | |
1035 | scmnd->result = DID_BAD_TARGET << 16; | |
1036 | done(scmnd); | |
1037 | return 0; | |
1038 | } | |
1039 | ||
8cba2077 | 1040 | iu = __srp_get_tx_iu(target, SRP_REQ_NORMAL); |
aef9ec39 RD |
1041 | if (!iu) |
1042 | goto err; | |
1043 | ||
05321937 | 1044 | dev = target->srp_host->srp_dev->dev; |
85507bcc RC |
1045 | ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len, |
1046 | DMA_TO_DEVICE); | |
aef9ec39 | 1047 | |
d945e1df | 1048 | req = list_entry(target->free_reqs.next, struct srp_request, list); |
aef9ec39 RD |
1049 | |
1050 | scmnd->scsi_done = done; | |
1051 | scmnd->result = 0; | |
d945e1df | 1052 | scmnd->host_scribble = (void *) (long) req->index; |
aef9ec39 RD |
1053 | |
1054 | cmd = iu->buf; | |
1055 | memset(cmd, 0, sizeof *cmd); | |
1056 | ||
1057 | cmd->opcode = SRP_CMD; | |
1058 | cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); | |
d945e1df | 1059 | cmd->tag = req->index; |
aef9ec39 RD |
1060 | memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); |
1061 | ||
aef9ec39 RD |
1062 | req->scmnd = scmnd; |
1063 | req->cmd = iu; | |
1064 | req->cmd_done = 0; | |
1065 | req->tsk_mgmt = NULL; | |
1066 | ||
1067 | len = srp_map_data(scmnd, target, req); | |
1068 | if (len < 0) { | |
7aa54bd7 DD |
1069 | shost_printk(KERN_ERR, target->scsi_host, |
1070 | PFX "Failed to map data\n"); | |
aef9ec39 RD |
1071 | goto err; |
1072 | } | |
1073 | ||
1074 | if (__srp_post_recv(target)) { | |
7aa54bd7 | 1075 | shost_printk(KERN_ERR, target->scsi_host, PFX "Recv failed\n"); |
aef9ec39 RD |
1076 | goto err_unmap; |
1077 | } | |
1078 | ||
85507bcc RC |
1079 | ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len, |
1080 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1081 | |
1082 | if (__srp_post_send(target, iu, len)) { | |
7aa54bd7 | 1083 | shost_printk(KERN_ERR, target->scsi_host, PFX "Send failed\n"); |
aef9ec39 RD |
1084 | goto err_unmap; |
1085 | } | |
1086 | ||
d945e1df | 1087 | list_move_tail(&req->list, &target->req_queue); |
aef9ec39 RD |
1088 | |
1089 | return 0; | |
1090 | ||
1091 | err_unmap: | |
1092 | srp_unmap_data(scmnd, target, req); | |
1093 | ||
1094 | err: | |
1095 | return SCSI_MLQUEUE_HOST_BUSY; | |
1096 | } | |
1097 | ||
1098 | static int srp_alloc_iu_bufs(struct srp_target_port *target) | |
1099 | { | |
1100 | int i; | |
1101 | ||
1102 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1103 | target->rx_ring[i] = srp_alloc_iu(target->srp_host, | |
1104 | target->max_ti_iu_len, | |
1105 | GFP_KERNEL, DMA_FROM_DEVICE); | |
1106 | if (!target->rx_ring[i]) | |
1107 | goto err; | |
1108 | } | |
1109 | ||
1110 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1111 | target->tx_ring[i] = srp_alloc_iu(target->srp_host, | |
74b0a15b | 1112 | srp_max_iu_len, |
aef9ec39 RD |
1113 | GFP_KERNEL, DMA_TO_DEVICE); |
1114 | if (!target->tx_ring[i]) | |
1115 | goto err; | |
1116 | } | |
1117 | ||
1118 | return 0; | |
1119 | ||
1120 | err: | |
1121 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1122 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
1123 | target->rx_ring[i] = NULL; | |
1124 | } | |
1125 | ||
1126 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1127 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
1128 | target->tx_ring[i] = NULL; | |
1129 | } | |
1130 | ||
1131 | return -ENOMEM; | |
1132 | } | |
1133 | ||
1134 | static void srp_cm_rej_handler(struct ib_cm_id *cm_id, | |
1135 | struct ib_cm_event *event, | |
1136 | struct srp_target_port *target) | |
1137 | { | |
7aa54bd7 | 1138 | struct Scsi_Host *shost = target->scsi_host; |
aef9ec39 RD |
1139 | struct ib_class_port_info *cpi; |
1140 | int opcode; | |
1141 | ||
1142 | switch (event->param.rej_rcvd.reason) { | |
1143 | case IB_CM_REJ_PORT_CM_REDIRECT: | |
1144 | cpi = event->param.rej_rcvd.ari; | |
1145 | target->path.dlid = cpi->redirect_lid; | |
1146 | target->path.pkey = cpi->redirect_pkey; | |
1147 | cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; | |
1148 | memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); | |
1149 | ||
1150 | target->status = target->path.dlid ? | |
1151 | SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; | |
1152 | break; | |
1153 | ||
1154 | case IB_CM_REJ_PORT_REDIRECT: | |
5d7cbfd6 | 1155 | if (srp_target_is_topspin(target)) { |
aef9ec39 RD |
1156 | /* |
1157 | * Topspin/Cisco SRP gateways incorrectly send | |
1158 | * reject reason code 25 when they mean 24 | |
1159 | * (port redirect). | |
1160 | */ | |
1161 | memcpy(target->path.dgid.raw, | |
1162 | event->param.rej_rcvd.ari, 16); | |
1163 | ||
7aa54bd7 DD |
1164 | shost_printk(KERN_DEBUG, shost, |
1165 | PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", | |
1166 | (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), | |
1167 | (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); | |
aef9ec39 RD |
1168 | |
1169 | target->status = SRP_PORT_REDIRECT; | |
1170 | } else { | |
7aa54bd7 DD |
1171 | shost_printk(KERN_WARNING, shost, |
1172 | " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); | |
aef9ec39 RD |
1173 | target->status = -ECONNRESET; |
1174 | } | |
1175 | break; | |
1176 | ||
1177 | case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: | |
7aa54bd7 DD |
1178 | shost_printk(KERN_WARNING, shost, |
1179 | " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); | |
aef9ec39 RD |
1180 | target->status = -ECONNRESET; |
1181 | break; | |
1182 | ||
1183 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1184 | opcode = *(u8 *) event->private_data; | |
1185 | if (opcode == SRP_LOGIN_REJ) { | |
1186 | struct srp_login_rej *rej = event->private_data; | |
1187 | u32 reason = be32_to_cpu(rej->reason); | |
1188 | ||
1189 | if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) | |
7aa54bd7 DD |
1190 | shost_printk(KERN_WARNING, shost, |
1191 | PFX "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); | |
aef9ec39 | 1192 | else |
7aa54bd7 DD |
1193 | shost_printk(KERN_WARNING, shost, |
1194 | PFX "SRP LOGIN REJECTED, reason 0x%08x\n", reason); | |
aef9ec39 | 1195 | } else |
7aa54bd7 DD |
1196 | shost_printk(KERN_WARNING, shost, |
1197 | " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," | |
1198 | " opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
1199 | target->status = -ECONNRESET; |
1200 | break; | |
1201 | ||
9fe4bcf4 DD |
1202 | case IB_CM_REJ_STALE_CONN: |
1203 | shost_printk(KERN_WARNING, shost, " REJ reason: stale connection\n"); | |
1204 | target->status = SRP_STALE_CONN; | |
1205 | break; | |
1206 | ||
aef9ec39 | 1207 | default: |
7aa54bd7 DD |
1208 | shost_printk(KERN_WARNING, shost, " REJ reason 0x%x\n", |
1209 | event->param.rej_rcvd.reason); | |
aef9ec39 RD |
1210 | target->status = -ECONNRESET; |
1211 | } | |
1212 | } | |
1213 | ||
1214 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
1215 | { | |
1216 | struct srp_target_port *target = cm_id->context; | |
1217 | struct ib_qp_attr *qp_attr = NULL; | |
1218 | int attr_mask = 0; | |
1219 | int comp = 0; | |
1220 | int opcode = 0; | |
1221 | ||
1222 | switch (event->event) { | |
1223 | case IB_CM_REQ_ERROR: | |
7aa54bd7 DD |
1224 | shost_printk(KERN_DEBUG, target->scsi_host, |
1225 | PFX "Sending CM REQ failed\n"); | |
aef9ec39 RD |
1226 | comp = 1; |
1227 | target->status = -ECONNRESET; | |
1228 | break; | |
1229 | ||
1230 | case IB_CM_REP_RECEIVED: | |
1231 | comp = 1; | |
1232 | opcode = *(u8 *) event->private_data; | |
1233 | ||
1234 | if (opcode == SRP_LOGIN_RSP) { | |
1235 | struct srp_login_rsp *rsp = event->private_data; | |
1236 | ||
1237 | target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); | |
1238 | target->req_lim = be32_to_cpu(rsp->req_lim_delta); | |
1239 | ||
1240 | target->scsi_host->can_queue = min(target->req_lim, | |
1241 | target->scsi_host->can_queue); | |
1242 | } else { | |
7aa54bd7 DD |
1243 | shost_printk(KERN_WARNING, target->scsi_host, |
1244 | PFX "Unhandled RSP opcode %#x\n", opcode); | |
aef9ec39 RD |
1245 | target->status = -ECONNRESET; |
1246 | break; | |
1247 | } | |
1248 | ||
d2fcea7d VP |
1249 | if (!target->rx_ring[0]) { |
1250 | target->status = srp_alloc_iu_bufs(target); | |
1251 | if (target->status) | |
1252 | break; | |
1253 | } | |
aef9ec39 RD |
1254 | |
1255 | qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); | |
1256 | if (!qp_attr) { | |
1257 | target->status = -ENOMEM; | |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | qp_attr->qp_state = IB_QPS_RTR; | |
1262 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1263 | if (target->status) | |
1264 | break; | |
1265 | ||
1266 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1267 | if (target->status) | |
1268 | break; | |
1269 | ||
1270 | target->status = srp_post_recv(target); | |
1271 | if (target->status) | |
1272 | break; | |
1273 | ||
1274 | qp_attr->qp_state = IB_QPS_RTS; | |
1275 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1276 | if (target->status) | |
1277 | break; | |
1278 | ||
1279 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1280 | if (target->status) | |
1281 | break; | |
1282 | ||
1283 | target->status = ib_send_cm_rtu(cm_id, NULL, 0); | |
1284 | if (target->status) | |
1285 | break; | |
1286 | ||
1287 | break; | |
1288 | ||
1289 | case IB_CM_REJ_RECEIVED: | |
7aa54bd7 | 1290 | shost_printk(KERN_DEBUG, target->scsi_host, PFX "REJ received\n"); |
aef9ec39 RD |
1291 | comp = 1; |
1292 | ||
1293 | srp_cm_rej_handler(cm_id, event, target); | |
1294 | break; | |
1295 | ||
b7ac4ab4 | 1296 | case IB_CM_DREQ_RECEIVED: |
7aa54bd7 DD |
1297 | shost_printk(KERN_WARNING, target->scsi_host, |
1298 | PFX "DREQ received - connection closed\n"); | |
b7ac4ab4 | 1299 | if (ib_send_cm_drep(cm_id, NULL, 0)) |
7aa54bd7 DD |
1300 | shost_printk(KERN_ERR, target->scsi_host, |
1301 | PFX "Sending CM DREP failed\n"); | |
aef9ec39 RD |
1302 | break; |
1303 | ||
1304 | case IB_CM_TIMEWAIT_EXIT: | |
7aa54bd7 DD |
1305 | shost_printk(KERN_ERR, target->scsi_host, |
1306 | PFX "connection closed\n"); | |
aef9ec39 RD |
1307 | |
1308 | comp = 1; | |
1309 | target->status = 0; | |
1310 | break; | |
1311 | ||
b7ac4ab4 IR |
1312 | case IB_CM_MRA_RECEIVED: |
1313 | case IB_CM_DREQ_ERROR: | |
1314 | case IB_CM_DREP_RECEIVED: | |
1315 | break; | |
1316 | ||
aef9ec39 | 1317 | default: |
7aa54bd7 DD |
1318 | shost_printk(KERN_WARNING, target->scsi_host, |
1319 | PFX "Unhandled CM event %d\n", event->event); | |
aef9ec39 RD |
1320 | break; |
1321 | } | |
1322 | ||
1323 | if (comp) | |
1324 | complete(&target->done); | |
1325 | ||
1326 | kfree(qp_attr); | |
1327 | ||
1328 | return 0; | |
1329 | } | |
1330 | ||
d945e1df RD |
1331 | static int srp_send_tsk_mgmt(struct srp_target_port *target, |
1332 | struct srp_request *req, u8 func) | |
aef9ec39 | 1333 | { |
aef9ec39 RD |
1334 | struct srp_iu *iu; |
1335 | struct srp_tsk_mgmt *tsk_mgmt; | |
aef9ec39 RD |
1336 | |
1337 | spin_lock_irq(target->scsi_host->host_lock); | |
1338 | ||
1285b3a0 RD |
1339 | if (target->state == SRP_TARGET_DEAD || |
1340 | target->state == SRP_TARGET_REMOVED) { | |
d945e1df | 1341 | req->scmnd->result = DID_BAD_TARGET << 16; |
1285b3a0 RD |
1342 | goto out; |
1343 | } | |
1344 | ||
aef9ec39 RD |
1345 | init_completion(&req->done); |
1346 | ||
8cba2077 | 1347 | iu = __srp_get_tx_iu(target, SRP_REQ_TASK_MGMT); |
aef9ec39 RD |
1348 | if (!iu) |
1349 | goto out; | |
1350 | ||
1351 | tsk_mgmt = iu->buf; | |
1352 | memset(tsk_mgmt, 0, sizeof *tsk_mgmt); | |
1353 | ||
1354 | tsk_mgmt->opcode = SRP_TSK_MGMT; | |
d945e1df RD |
1355 | tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48); |
1356 | tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT; | |
aef9ec39 | 1357 | tsk_mgmt->tsk_mgmt_func = func; |
d945e1df | 1358 | tsk_mgmt->task_tag = req->index; |
aef9ec39 RD |
1359 | |
1360 | if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) | |
1361 | goto out; | |
1362 | ||
1363 | req->tsk_mgmt = iu; | |
1364 | ||
1365 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df | 1366 | |
aef9ec39 RD |
1367 | if (!wait_for_completion_timeout(&req->done, |
1368 | msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) | |
d945e1df | 1369 | return -1; |
aef9ec39 | 1370 | |
d945e1df | 1371 | return 0; |
aef9ec39 RD |
1372 | |
1373 | out: | |
1374 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df RD |
1375 | return -1; |
1376 | } | |
1377 | ||
1378 | static int srp_find_req(struct srp_target_port *target, | |
1379 | struct scsi_cmnd *scmnd, | |
1380 | struct srp_request **req) | |
1381 | { | |
1382 | if (scmnd->host_scribble == (void *) -1L) | |
1383 | return -1; | |
1384 | ||
1385 | *req = &target->req_ring[(long) scmnd->host_scribble]; | |
1386 | ||
1387 | return 0; | |
aef9ec39 RD |
1388 | } |
1389 | ||
1390 | static int srp_abort(struct scsi_cmnd *scmnd) | |
1391 | { | |
d945e1df RD |
1392 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1393 | struct srp_request *req; | |
1394 | int ret = SUCCESS; | |
1395 | ||
7aa54bd7 | 1396 | shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n"); |
aef9ec39 | 1397 | |
1033ff67 IR |
1398 | if (target->qp_in_error) |
1399 | return FAILED; | |
d945e1df RD |
1400 | if (srp_find_req(target, scmnd, &req)) |
1401 | return FAILED; | |
1402 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK)) | |
1403 | return FAILED; | |
1404 | ||
1405 | spin_lock_irq(target->scsi_host->host_lock); | |
1406 | ||
1407 | if (req->cmd_done) { | |
1408 | srp_remove_req(target, req); | |
1409 | scmnd->scsi_done(scmnd); | |
1410 | } else if (!req->tsk_status) { | |
1411 | srp_remove_req(target, req); | |
1412 | scmnd->result = DID_ABORT << 16; | |
1413 | } else | |
1414 | ret = FAILED; | |
1415 | ||
1416 | spin_unlock_irq(target->scsi_host->host_lock); | |
1417 | ||
1418 | return ret; | |
aef9ec39 RD |
1419 | } |
1420 | ||
1421 | static int srp_reset_device(struct scsi_cmnd *scmnd) | |
1422 | { | |
d945e1df RD |
1423 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1424 | struct srp_request *req, *tmp; | |
1425 | ||
7aa54bd7 | 1426 | shost_printk(KERN_ERR, target->scsi_host, "SRP reset_device called\n"); |
aef9ec39 | 1427 | |
1033ff67 IR |
1428 | if (target->qp_in_error) |
1429 | return FAILED; | |
d945e1df RD |
1430 | if (srp_find_req(target, scmnd, &req)) |
1431 | return FAILED; | |
1432 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET)) | |
1433 | return FAILED; | |
1434 | if (req->tsk_status) | |
1435 | return FAILED; | |
1436 | ||
1437 | spin_lock_irq(target->scsi_host->host_lock); | |
1438 | ||
1439 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) | |
526b4caa IR |
1440 | if (req->scmnd->device == scmnd->device) |
1441 | srp_reset_req(target, req); | |
d945e1df RD |
1442 | |
1443 | spin_unlock_irq(target->scsi_host->host_lock); | |
1444 | ||
1445 | return SUCCESS; | |
aef9ec39 RD |
1446 | } |
1447 | ||
1448 | static int srp_reset_host(struct scsi_cmnd *scmnd) | |
1449 | { | |
1450 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1451 | int ret = FAILED; | |
1452 | ||
7aa54bd7 | 1453 | shost_printk(KERN_ERR, target->scsi_host, PFX "SRP reset_host called\n"); |
aef9ec39 RD |
1454 | |
1455 | if (!srp_reconnect_target(target)) | |
1456 | ret = SUCCESS; | |
1457 | ||
1458 | return ret; | |
1459 | } | |
1460 | ||
ee959b00 TJ |
1461 | static ssize_t show_id_ext(struct device *dev, struct device_attribute *attr, |
1462 | char *buf) | |
6ecb0c84 | 1463 | { |
ee959b00 | 1464 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1465 | |
1466 | if (target->state == SRP_TARGET_DEAD || | |
1467 | target->state == SRP_TARGET_REMOVED) | |
1468 | return -ENODEV; | |
1469 | ||
1470 | return sprintf(buf, "0x%016llx\n", | |
1471 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1472 | } | |
1473 | ||
ee959b00 TJ |
1474 | static ssize_t show_ioc_guid(struct device *dev, struct device_attribute *attr, |
1475 | char *buf) | |
6ecb0c84 | 1476 | { |
ee959b00 | 1477 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1478 | |
1479 | if (target->state == SRP_TARGET_DEAD || | |
1480 | target->state == SRP_TARGET_REMOVED) | |
1481 | return -ENODEV; | |
1482 | ||
1483 | return sprintf(buf, "0x%016llx\n", | |
1484 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
1485 | } | |
1486 | ||
ee959b00 TJ |
1487 | static ssize_t show_service_id(struct device *dev, |
1488 | struct device_attribute *attr, char *buf) | |
6ecb0c84 | 1489 | { |
ee959b00 | 1490 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1491 | |
1492 | if (target->state == SRP_TARGET_DEAD || | |
1493 | target->state == SRP_TARGET_REMOVED) | |
1494 | return -ENODEV; | |
1495 | ||
1496 | return sprintf(buf, "0x%016llx\n", | |
1497 | (unsigned long long) be64_to_cpu(target->service_id)); | |
1498 | } | |
1499 | ||
ee959b00 TJ |
1500 | static ssize_t show_pkey(struct device *dev, struct device_attribute *attr, |
1501 | char *buf) | |
6ecb0c84 | 1502 | { |
ee959b00 | 1503 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1504 | |
1505 | if (target->state == SRP_TARGET_DEAD || | |
1506 | target->state == SRP_TARGET_REMOVED) | |
1507 | return -ENODEV; | |
1508 | ||
1509 | return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); | |
1510 | } | |
1511 | ||
ee959b00 TJ |
1512 | static ssize_t show_dgid(struct device *dev, struct device_attribute *attr, |
1513 | char *buf) | |
6ecb0c84 | 1514 | { |
ee959b00 | 1515 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1516 | |
1517 | if (target->state == SRP_TARGET_DEAD || | |
1518 | target->state == SRP_TARGET_REMOVED) | |
1519 | return -ENODEV; | |
1520 | ||
1521 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1522 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]), | |
1523 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]), | |
1524 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]), | |
1525 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]), | |
1526 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]), | |
1527 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]), | |
1528 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]), | |
1529 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[7])); | |
1530 | } | |
1531 | ||
ee959b00 TJ |
1532 | static ssize_t show_orig_dgid(struct device *dev, |
1533 | struct device_attribute *attr, char *buf) | |
3633b3d0 | 1534 | { |
ee959b00 | 1535 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
3633b3d0 IR |
1536 | |
1537 | if (target->state == SRP_TARGET_DEAD || | |
1538 | target->state == SRP_TARGET_REMOVED) | |
1539 | return -ENODEV; | |
1540 | ||
1541 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1542 | be16_to_cpu(target->orig_dgid[0]), | |
1543 | be16_to_cpu(target->orig_dgid[1]), | |
1544 | be16_to_cpu(target->orig_dgid[2]), | |
1545 | be16_to_cpu(target->orig_dgid[3]), | |
1546 | be16_to_cpu(target->orig_dgid[4]), | |
1547 | be16_to_cpu(target->orig_dgid[5]), | |
1548 | be16_to_cpu(target->orig_dgid[6]), | |
1549 | be16_to_cpu(target->orig_dgid[7])); | |
1550 | } | |
1551 | ||
ee959b00 TJ |
1552 | static ssize_t show_zero_req_lim(struct device *dev, |
1553 | struct device_attribute *attr, char *buf) | |
6bfa24fa | 1554 | { |
ee959b00 | 1555 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6bfa24fa RD |
1556 | |
1557 | if (target->state == SRP_TARGET_DEAD || | |
1558 | target->state == SRP_TARGET_REMOVED) | |
1559 | return -ENODEV; | |
1560 | ||
1561 | return sprintf(buf, "%d\n", target->zero_req_lim); | |
1562 | } | |
1563 | ||
ee959b00 TJ |
1564 | static ssize_t show_local_ib_port(struct device *dev, |
1565 | struct device_attribute *attr, char *buf) | |
ded7f1a1 | 1566 | { |
ee959b00 | 1567 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
ded7f1a1 IR |
1568 | |
1569 | return sprintf(buf, "%d\n", target->srp_host->port); | |
1570 | } | |
1571 | ||
ee959b00 TJ |
1572 | static ssize_t show_local_ib_device(struct device *dev, |
1573 | struct device_attribute *attr, char *buf) | |
ded7f1a1 | 1574 | { |
ee959b00 | 1575 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
ded7f1a1 | 1576 | |
05321937 | 1577 | return sprintf(buf, "%s\n", target->srp_host->srp_dev->dev->name); |
ded7f1a1 IR |
1578 | } |
1579 | ||
ee959b00 TJ |
1580 | static DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); |
1581 | static DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); | |
1582 | static DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); | |
1583 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
1584 | static DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); | |
1585 | static DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL); | |
1586 | static DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); | |
1587 | static DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL); | |
1588 | static DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL); | |
1589 | ||
1590 | static struct device_attribute *srp_host_attrs[] = { | |
1591 | &dev_attr_id_ext, | |
1592 | &dev_attr_ioc_guid, | |
1593 | &dev_attr_service_id, | |
1594 | &dev_attr_pkey, | |
1595 | &dev_attr_dgid, | |
1596 | &dev_attr_orig_dgid, | |
1597 | &dev_attr_zero_req_lim, | |
1598 | &dev_attr_local_ib_port, | |
1599 | &dev_attr_local_ib_device, | |
6ecb0c84 RD |
1600 | NULL |
1601 | }; | |
1602 | ||
aef9ec39 RD |
1603 | static struct scsi_host_template srp_template = { |
1604 | .module = THIS_MODULE, | |
b7f008fd RD |
1605 | .name = "InfiniBand SRP initiator", |
1606 | .proc_name = DRV_NAME, | |
aef9ec39 RD |
1607 | .info = srp_target_info, |
1608 | .queuecommand = srp_queuecommand, | |
1609 | .eh_abort_handler = srp_abort, | |
1610 | .eh_device_reset_handler = srp_reset_device, | |
1611 | .eh_host_reset_handler = srp_reset_host, | |
1612 | .can_queue = SRP_SQ_SIZE, | |
1613 | .this_id = -1, | |
aef9ec39 | 1614 | .cmd_per_lun = SRP_SQ_SIZE, |
6ecb0c84 RD |
1615 | .use_clustering = ENABLE_CLUSTERING, |
1616 | .shost_attrs = srp_host_attrs | |
aef9ec39 RD |
1617 | }; |
1618 | ||
1619 | static int srp_add_target(struct srp_host *host, struct srp_target_port *target) | |
1620 | { | |
3236822b FT |
1621 | struct srp_rport_identifiers ids; |
1622 | struct srp_rport *rport; | |
1623 | ||
aef9ec39 RD |
1624 | sprintf(target->target_name, "SRP.T10:%016llX", |
1625 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1626 | ||
05321937 | 1627 | if (scsi_add_host(target->scsi_host, host->srp_dev->dev->dma_device)) |
aef9ec39 RD |
1628 | return -ENODEV; |
1629 | ||
3236822b FT |
1630 | memcpy(ids.port_id, &target->id_ext, 8); |
1631 | memcpy(ids.port_id + 8, &target->ioc_guid, 8); | |
aebd5e47 | 1632 | ids.roles = SRP_RPORT_ROLE_TARGET; |
3236822b FT |
1633 | rport = srp_rport_add(target->scsi_host, &ids); |
1634 | if (IS_ERR(rport)) { | |
1635 | scsi_remove_host(target->scsi_host); | |
1636 | return PTR_ERR(rport); | |
1637 | } | |
1638 | ||
b3589fd4 | 1639 | spin_lock(&host->target_lock); |
aef9ec39 | 1640 | list_add_tail(&target->list, &host->target_list); |
b3589fd4 | 1641 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1642 | |
1643 | target->state = SRP_TARGET_LIVE; | |
1644 | ||
aef9ec39 | 1645 | scsi_scan_target(&target->scsi_host->shost_gendev, |
1962a4a1 | 1646 | 0, target->scsi_id, SCAN_WILD_CARD, 0); |
aef9ec39 RD |
1647 | |
1648 | return 0; | |
1649 | } | |
1650 | ||
ee959b00 | 1651 | static void srp_release_dev(struct device *dev) |
aef9ec39 RD |
1652 | { |
1653 | struct srp_host *host = | |
ee959b00 | 1654 | container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
1655 | |
1656 | complete(&host->released); | |
1657 | } | |
1658 | ||
1659 | static struct class srp_class = { | |
1660 | .name = "infiniband_srp", | |
ee959b00 | 1661 | .dev_release = srp_release_dev |
aef9ec39 RD |
1662 | }; |
1663 | ||
1664 | /* | |
1665 | * Target ports are added by writing | |
1666 | * | |
1667 | * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, | |
1668 | * pkey=<P_Key>,service_id=<service ID> | |
1669 | * | |
1670 | * to the add_target sysfs attribute. | |
1671 | */ | |
1672 | enum { | |
1673 | SRP_OPT_ERR = 0, | |
1674 | SRP_OPT_ID_EXT = 1 << 0, | |
1675 | SRP_OPT_IOC_GUID = 1 << 1, | |
1676 | SRP_OPT_DGID = 1 << 2, | |
1677 | SRP_OPT_PKEY = 1 << 3, | |
1678 | SRP_OPT_SERVICE_ID = 1 << 4, | |
1679 | SRP_OPT_MAX_SECT = 1 << 5, | |
52fb2b50 | 1680 | SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, |
0c0450db | 1681 | SRP_OPT_IO_CLASS = 1 << 7, |
01cb9bcb | 1682 | SRP_OPT_INITIATOR_EXT = 1 << 8, |
aef9ec39 RD |
1683 | SRP_OPT_ALL = (SRP_OPT_ID_EXT | |
1684 | SRP_OPT_IOC_GUID | | |
1685 | SRP_OPT_DGID | | |
1686 | SRP_OPT_PKEY | | |
1687 | SRP_OPT_SERVICE_ID), | |
1688 | }; | |
1689 | ||
1690 | static match_table_t srp_opt_tokens = { | |
52fb2b50 VP |
1691 | { SRP_OPT_ID_EXT, "id_ext=%s" }, |
1692 | { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, | |
1693 | { SRP_OPT_DGID, "dgid=%s" }, | |
1694 | { SRP_OPT_PKEY, "pkey=%x" }, | |
1695 | { SRP_OPT_SERVICE_ID, "service_id=%s" }, | |
1696 | { SRP_OPT_MAX_SECT, "max_sect=%d" }, | |
1697 | { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, | |
0c0450db | 1698 | { SRP_OPT_IO_CLASS, "io_class=%x" }, |
01cb9bcb | 1699 | { SRP_OPT_INITIATOR_EXT, "initiator_ext=%s" }, |
52fb2b50 | 1700 | { SRP_OPT_ERR, NULL } |
aef9ec39 RD |
1701 | }; |
1702 | ||
1703 | static int srp_parse_options(const char *buf, struct srp_target_port *target) | |
1704 | { | |
1705 | char *options, *sep_opt; | |
1706 | char *p; | |
1707 | char dgid[3]; | |
1708 | substring_t args[MAX_OPT_ARGS]; | |
1709 | int opt_mask = 0; | |
1710 | int token; | |
1711 | int ret = -EINVAL; | |
1712 | int i; | |
1713 | ||
1714 | options = kstrdup(buf, GFP_KERNEL); | |
1715 | if (!options) | |
1716 | return -ENOMEM; | |
1717 | ||
1718 | sep_opt = options; | |
1719 | while ((p = strsep(&sep_opt, ",")) != NULL) { | |
1720 | if (!*p) | |
1721 | continue; | |
1722 | ||
1723 | token = match_token(p, srp_opt_tokens, args); | |
1724 | opt_mask |= token; | |
1725 | ||
1726 | switch (token) { | |
1727 | case SRP_OPT_ID_EXT: | |
1728 | p = match_strdup(args); | |
a20f3a6d IR |
1729 | if (!p) { |
1730 | ret = -ENOMEM; | |
1731 | goto out; | |
1732 | } | |
aef9ec39 RD |
1733 | target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1734 | kfree(p); | |
1735 | break; | |
1736 | ||
1737 | case SRP_OPT_IOC_GUID: | |
1738 | p = match_strdup(args); | |
a20f3a6d IR |
1739 | if (!p) { |
1740 | ret = -ENOMEM; | |
1741 | goto out; | |
1742 | } | |
aef9ec39 RD |
1743 | target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1744 | kfree(p); | |
1745 | break; | |
1746 | ||
1747 | case SRP_OPT_DGID: | |
1748 | p = match_strdup(args); | |
a20f3a6d IR |
1749 | if (!p) { |
1750 | ret = -ENOMEM; | |
1751 | goto out; | |
1752 | } | |
aef9ec39 RD |
1753 | if (strlen(p) != 32) { |
1754 | printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); | |
ce1823f0 | 1755 | kfree(p); |
aef9ec39 RD |
1756 | goto out; |
1757 | } | |
1758 | ||
1759 | for (i = 0; i < 16; ++i) { | |
1760 | strlcpy(dgid, p + i * 2, 3); | |
1761 | target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); | |
1762 | } | |
bf17c1c7 | 1763 | kfree(p); |
3633b3d0 | 1764 | memcpy(target->orig_dgid, target->path.dgid.raw, 16); |
aef9ec39 RD |
1765 | break; |
1766 | ||
1767 | case SRP_OPT_PKEY: | |
1768 | if (match_hex(args, &token)) { | |
1769 | printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); | |
1770 | goto out; | |
1771 | } | |
1772 | target->path.pkey = cpu_to_be16(token); | |
1773 | break; | |
1774 | ||
1775 | case SRP_OPT_SERVICE_ID: | |
1776 | p = match_strdup(args); | |
a20f3a6d IR |
1777 | if (!p) { |
1778 | ret = -ENOMEM; | |
1779 | goto out; | |
1780 | } | |
aef9ec39 | 1781 | target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
247e020e | 1782 | target->path.service_id = target->service_id; |
aef9ec39 RD |
1783 | kfree(p); |
1784 | break; | |
1785 | ||
1786 | case SRP_OPT_MAX_SECT: | |
1787 | if (match_int(args, &token)) { | |
1788 | printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); | |
1789 | goto out; | |
1790 | } | |
1791 | target->scsi_host->max_sectors = token; | |
1792 | break; | |
1793 | ||
52fb2b50 VP |
1794 | case SRP_OPT_MAX_CMD_PER_LUN: |
1795 | if (match_int(args, &token)) { | |
1796 | printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); | |
1797 | goto out; | |
1798 | } | |
1799 | target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); | |
1800 | break; | |
1801 | ||
0c0450db R |
1802 | case SRP_OPT_IO_CLASS: |
1803 | if (match_hex(args, &token)) { | |
1804 | printk(KERN_WARNING PFX "bad IO class parameter '%s' \n", p); | |
1805 | goto out; | |
1806 | } | |
1807 | if (token != SRP_REV10_IB_IO_CLASS && | |
1808 | token != SRP_REV16A_IB_IO_CLASS) { | |
1809 | printk(KERN_WARNING PFX "unknown IO class parameter value" | |
1810 | " %x specified (use %x or %x).\n", | |
1811 | token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); | |
1812 | goto out; | |
1813 | } | |
1814 | target->io_class = token; | |
1815 | break; | |
1816 | ||
01cb9bcb IR |
1817 | case SRP_OPT_INITIATOR_EXT: |
1818 | p = match_strdup(args); | |
a20f3a6d IR |
1819 | if (!p) { |
1820 | ret = -ENOMEM; | |
1821 | goto out; | |
1822 | } | |
01cb9bcb IR |
1823 | target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1824 | kfree(p); | |
1825 | break; | |
1826 | ||
aef9ec39 RD |
1827 | default: |
1828 | printk(KERN_WARNING PFX "unknown parameter or missing value " | |
1829 | "'%s' in target creation request\n", p); | |
1830 | goto out; | |
1831 | } | |
1832 | } | |
1833 | ||
1834 | if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) | |
1835 | ret = 0; | |
1836 | else | |
1837 | for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) | |
1838 | if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && | |
1839 | !(srp_opt_tokens[i].token & opt_mask)) | |
1840 | printk(KERN_WARNING PFX "target creation request is " | |
1841 | "missing parameter '%s'\n", | |
1842 | srp_opt_tokens[i].pattern); | |
1843 | ||
1844 | out: | |
1845 | kfree(options); | |
1846 | return ret; | |
1847 | } | |
1848 | ||
ee959b00 TJ |
1849 | static ssize_t srp_create_target(struct device *dev, |
1850 | struct device_attribute *attr, | |
aef9ec39 RD |
1851 | const char *buf, size_t count) |
1852 | { | |
1853 | struct srp_host *host = | |
ee959b00 | 1854 | container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
1855 | struct Scsi_Host *target_host; |
1856 | struct srp_target_port *target; | |
1857 | int ret; | |
1858 | int i; | |
1859 | ||
1860 | target_host = scsi_host_alloc(&srp_template, | |
1861 | sizeof (struct srp_target_port)); | |
1862 | if (!target_host) | |
1863 | return -ENOMEM; | |
1864 | ||
3236822b | 1865 | target_host->transportt = ib_srp_transport_template; |
3c8edf0e AR |
1866 | target_host->max_lun = SRP_MAX_LUN; |
1867 | target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; | |
5f068992 | 1868 | |
aef9ec39 | 1869 | target = host_to_target(target_host); |
aef9ec39 | 1870 | |
0c0450db | 1871 | target->io_class = SRP_REV16A_IB_IO_CLASS; |
aef9ec39 RD |
1872 | target->scsi_host = target_host; |
1873 | target->srp_host = host; | |
1874 | ||
d945e1df | 1875 | INIT_LIST_HEAD(&target->free_reqs); |
aef9ec39 | 1876 | INIT_LIST_HEAD(&target->req_queue); |
d945e1df RD |
1877 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
1878 | target->req_ring[i].index = i; | |
1879 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
1880 | } | |
aef9ec39 RD |
1881 | |
1882 | ret = srp_parse_options(buf, target); | |
1883 | if (ret) | |
1884 | goto err; | |
1885 | ||
05321937 GKH |
1886 | ib_get_cached_gid(host->srp_dev->dev, host->port, 0, |
1887 | &target->path.sgid); | |
aef9ec39 | 1888 | |
7aa54bd7 DD |
1889 | shost_printk(KERN_DEBUG, target->scsi_host, PFX |
1890 | "new target: id_ext %016llx ioc_guid %016llx pkey %04x " | |
1891 | "service_id %016llx dgid %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
aef9ec39 RD |
1892 | (unsigned long long) be64_to_cpu(target->id_ext), |
1893 | (unsigned long long) be64_to_cpu(target->ioc_guid), | |
1894 | be16_to_cpu(target->path.pkey), | |
1895 | (unsigned long long) be64_to_cpu(target->service_id), | |
1896 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[0]), | |
1897 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[2]), | |
1898 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[4]), | |
1899 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[6]), | |
1900 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[8]), | |
1901 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[10]), | |
1902 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[12]), | |
1903 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[14])); | |
1904 | ||
1905 | ret = srp_create_target_ib(target); | |
1906 | if (ret) | |
1907 | goto err; | |
1908 | ||
9fe4bcf4 DD |
1909 | ret = srp_new_cm_id(target); |
1910 | if (ret) | |
aef9ec39 | 1911 | goto err_free; |
aef9ec39 | 1912 | |
1033ff67 | 1913 | target->qp_in_error = 0; |
aef9ec39 RD |
1914 | ret = srp_connect_target(target); |
1915 | if (ret) { | |
7aa54bd7 DD |
1916 | shost_printk(KERN_ERR, target->scsi_host, |
1917 | PFX "Connection failed\n"); | |
aef9ec39 RD |
1918 | goto err_cm_id; |
1919 | } | |
1920 | ||
1921 | ret = srp_add_target(host, target); | |
1922 | if (ret) | |
1923 | goto err_disconnect; | |
1924 | ||
1925 | return count; | |
1926 | ||
1927 | err_disconnect: | |
1928 | srp_disconnect_target(target); | |
1929 | ||
1930 | err_cm_id: | |
1931 | ib_destroy_cm_id(target->cm_id); | |
1932 | ||
1933 | err_free: | |
1934 | srp_free_target_ib(target); | |
1935 | ||
1936 | err: | |
1937 | scsi_host_put(target_host); | |
1938 | ||
1939 | return ret; | |
1940 | } | |
1941 | ||
ee959b00 | 1942 | static DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); |
aef9ec39 | 1943 | |
ee959b00 TJ |
1944 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
1945 | char *buf) | |
aef9ec39 | 1946 | { |
ee959b00 | 1947 | struct srp_host *host = container_of(dev, struct srp_host, dev); |
aef9ec39 | 1948 | |
05321937 | 1949 | return sprintf(buf, "%s\n", host->srp_dev->dev->name); |
aef9ec39 RD |
1950 | } |
1951 | ||
ee959b00 | 1952 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
aef9ec39 | 1953 | |
ee959b00 TJ |
1954 | static ssize_t show_port(struct device *dev, struct device_attribute *attr, |
1955 | char *buf) | |
aef9ec39 | 1956 | { |
ee959b00 | 1957 | struct srp_host *host = container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
1958 | |
1959 | return sprintf(buf, "%d\n", host->port); | |
1960 | } | |
1961 | ||
ee959b00 | 1962 | static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); |
aef9ec39 | 1963 | |
f5358a17 | 1964 | static struct srp_host *srp_add_port(struct srp_device *device, u8 port) |
aef9ec39 RD |
1965 | { |
1966 | struct srp_host *host; | |
1967 | ||
1968 | host = kzalloc(sizeof *host, GFP_KERNEL); | |
1969 | if (!host) | |
1970 | return NULL; | |
1971 | ||
1972 | INIT_LIST_HEAD(&host->target_list); | |
b3589fd4 | 1973 | spin_lock_init(&host->target_lock); |
aef9ec39 | 1974 | init_completion(&host->released); |
05321937 | 1975 | host->srp_dev = device; |
aef9ec39 RD |
1976 | host->port = port; |
1977 | ||
ee959b00 TJ |
1978 | host->dev.class = &srp_class; |
1979 | host->dev.parent = device->dev->dma_device; | |
1980 | snprintf(host->dev.bus_id, BUS_ID_SIZE, "srp-%s-%d", | |
f5358a17 | 1981 | device->dev->name, port); |
aef9ec39 | 1982 | |
ee959b00 | 1983 | if (device_register(&host->dev)) |
f5358a17 | 1984 | goto free_host; |
ee959b00 | 1985 | if (device_create_file(&host->dev, &dev_attr_add_target)) |
aef9ec39 | 1986 | goto err_class; |
ee959b00 | 1987 | if (device_create_file(&host->dev, &dev_attr_ibdev)) |
aef9ec39 | 1988 | goto err_class; |
ee959b00 | 1989 | if (device_create_file(&host->dev, &dev_attr_port)) |
aef9ec39 RD |
1990 | goto err_class; |
1991 | ||
1992 | return host; | |
1993 | ||
1994 | err_class: | |
ee959b00 | 1995 | device_unregister(&host->dev); |
aef9ec39 | 1996 | |
f5358a17 | 1997 | free_host: |
aef9ec39 RD |
1998 | kfree(host); |
1999 | ||
2000 | return NULL; | |
2001 | } | |
2002 | ||
2003 | static void srp_add_one(struct ib_device *device) | |
2004 | { | |
f5358a17 RD |
2005 | struct srp_device *srp_dev; |
2006 | struct ib_device_attr *dev_attr; | |
2007 | struct ib_fmr_pool_param fmr_param; | |
aef9ec39 | 2008 | struct srp_host *host; |
aef9ec39 RD |
2009 | int s, e, p; |
2010 | ||
f5358a17 RD |
2011 | dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); |
2012 | if (!dev_attr) | |
cf311cd4 | 2013 | return; |
aef9ec39 | 2014 | |
f5358a17 RD |
2015 | if (ib_query_device(device, dev_attr)) { |
2016 | printk(KERN_WARNING PFX "Query device failed for %s\n", | |
2017 | device->name); | |
2018 | goto free_attr; | |
2019 | } | |
2020 | ||
2021 | srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); | |
2022 | if (!srp_dev) | |
2023 | goto free_attr; | |
2024 | ||
2025 | /* | |
2026 | * Use the smallest page size supported by the HCA, down to a | |
2027 | * minimum of 512 bytes (which is the smallest sector that a | |
2028 | * SCSI command will ever carry). | |
2029 | */ | |
2030 | srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); | |
2031 | srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; | |
bf628dc2 | 2032 | srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1); |
f5358a17 RD |
2033 | |
2034 | INIT_LIST_HEAD(&srp_dev->dev_list); | |
2035 | ||
2036 | srp_dev->dev = device; | |
2037 | srp_dev->pd = ib_alloc_pd(device); | |
2038 | if (IS_ERR(srp_dev->pd)) | |
2039 | goto free_dev; | |
2040 | ||
2041 | srp_dev->mr = ib_get_dma_mr(srp_dev->pd, | |
2042 | IB_ACCESS_LOCAL_WRITE | | |
2043 | IB_ACCESS_REMOTE_READ | | |
2044 | IB_ACCESS_REMOTE_WRITE); | |
2045 | if (IS_ERR(srp_dev->mr)) | |
2046 | goto err_pd; | |
2047 | ||
2048 | memset(&fmr_param, 0, sizeof fmr_param); | |
2049 | fmr_param.pool_size = SRP_FMR_POOL_SIZE; | |
2050 | fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; | |
2051 | fmr_param.cache = 1; | |
2052 | fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; | |
2053 | fmr_param.page_shift = srp_dev->fmr_page_shift; | |
2054 | fmr_param.access = (IB_ACCESS_LOCAL_WRITE | | |
2055 | IB_ACCESS_REMOTE_WRITE | | |
2056 | IB_ACCESS_REMOTE_READ); | |
2057 | ||
2058 | srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); | |
2059 | if (IS_ERR(srp_dev->fmr_pool)) | |
2060 | srp_dev->fmr_pool = NULL; | |
aef9ec39 | 2061 | |
07ebafba | 2062 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
aef9ec39 RD |
2063 | s = 0; |
2064 | e = 0; | |
2065 | } else { | |
2066 | s = 1; | |
2067 | e = device->phys_port_cnt; | |
2068 | } | |
2069 | ||
2070 | for (p = s; p <= e; ++p) { | |
f5358a17 | 2071 | host = srp_add_port(srp_dev, p); |
aef9ec39 | 2072 | if (host) |
f5358a17 | 2073 | list_add_tail(&host->list, &srp_dev->dev_list); |
aef9ec39 RD |
2074 | } |
2075 | ||
f5358a17 RD |
2076 | ib_set_client_data(device, &srp_client, srp_dev); |
2077 | ||
2078 | goto free_attr; | |
2079 | ||
2080 | err_pd: | |
2081 | ib_dealloc_pd(srp_dev->pd); | |
2082 | ||
2083 | free_dev: | |
2084 | kfree(srp_dev); | |
2085 | ||
2086 | free_attr: | |
2087 | kfree(dev_attr); | |
aef9ec39 RD |
2088 | } |
2089 | ||
2090 | static void srp_remove_one(struct ib_device *device) | |
2091 | { | |
f5358a17 | 2092 | struct srp_device *srp_dev; |
aef9ec39 RD |
2093 | struct srp_host *host, *tmp_host; |
2094 | LIST_HEAD(target_list); | |
2095 | struct srp_target_port *target, *tmp_target; | |
aef9ec39 | 2096 | |
f5358a17 | 2097 | srp_dev = ib_get_client_data(device, &srp_client); |
aef9ec39 | 2098 | |
f5358a17 | 2099 | list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { |
ee959b00 | 2100 | device_unregister(&host->dev); |
aef9ec39 RD |
2101 | /* |
2102 | * Wait for the sysfs entry to go away, so that no new | |
2103 | * target ports can be created. | |
2104 | */ | |
2105 | wait_for_completion(&host->released); | |
2106 | ||
2107 | /* | |
2108 | * Mark all target ports as removed, so we stop queueing | |
2109 | * commands and don't try to reconnect. | |
2110 | */ | |
b3589fd4 | 2111 | spin_lock(&host->target_lock); |
549c5fc2 | 2112 | list_for_each_entry(target, &host->target_list, list) { |
0c5b3952 IR |
2113 | spin_lock_irq(target->scsi_host->host_lock); |
2114 | target->state = SRP_TARGET_REMOVED; | |
2115 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 | 2116 | } |
b3589fd4 | 2117 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
2118 | |
2119 | /* | |
2120 | * Wait for any reconnection tasks that may have | |
2121 | * started before we marked our target ports as | |
2122 | * removed, and any target port removal tasks. | |
2123 | */ | |
2124 | flush_scheduled_work(); | |
2125 | ||
2126 | list_for_each_entry_safe(target, tmp_target, | |
2127 | &host->target_list, list) { | |
b0e47c8b | 2128 | srp_remove_host(target->scsi_host); |
ad696989 | 2129 | scsi_remove_host(target->scsi_host); |
aef9ec39 RD |
2130 | srp_disconnect_target(target); |
2131 | ib_destroy_cm_id(target->cm_id); | |
2132 | srp_free_target_ib(target); | |
2133 | scsi_host_put(target->scsi_host); | |
2134 | } | |
2135 | ||
aef9ec39 RD |
2136 | kfree(host); |
2137 | } | |
2138 | ||
f5358a17 RD |
2139 | if (srp_dev->fmr_pool) |
2140 | ib_destroy_fmr_pool(srp_dev->fmr_pool); | |
2141 | ib_dereg_mr(srp_dev->mr); | |
2142 | ib_dealloc_pd(srp_dev->pd); | |
2143 | ||
2144 | kfree(srp_dev); | |
aef9ec39 RD |
2145 | } |
2146 | ||
3236822b FT |
2147 | static struct srp_function_template ib_srp_transport_functions = { |
2148 | }; | |
2149 | ||
aef9ec39 RD |
2150 | static int __init srp_init_module(void) |
2151 | { | |
2152 | int ret; | |
2153 | ||
1e89a194 DD |
2154 | if (srp_sg_tablesize > 255) { |
2155 | printk(KERN_WARNING PFX "Clamping srp_sg_tablesize to 255\n"); | |
2156 | srp_sg_tablesize = 255; | |
2157 | } | |
2158 | ||
3236822b FT |
2159 | ib_srp_transport_template = |
2160 | srp_attach_transport(&ib_srp_transport_functions); | |
2161 | if (!ib_srp_transport_template) | |
2162 | return -ENOMEM; | |
2163 | ||
74b0a15b VP |
2164 | srp_template.sg_tablesize = srp_sg_tablesize; |
2165 | srp_max_iu_len = (sizeof (struct srp_cmd) + | |
2166 | sizeof (struct srp_indirect_buf) + | |
2167 | srp_sg_tablesize * 16); | |
2168 | ||
aef9ec39 RD |
2169 | ret = class_register(&srp_class); |
2170 | if (ret) { | |
2171 | printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); | |
3236822b | 2172 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2173 | return ret; |
2174 | } | |
2175 | ||
c1a0b23b MT |
2176 | ib_sa_register_client(&srp_sa_client); |
2177 | ||
aef9ec39 RD |
2178 | ret = ib_register_client(&srp_client); |
2179 | if (ret) { | |
2180 | printk(KERN_ERR PFX "couldn't register IB client\n"); | |
3236822b | 2181 | srp_release_transport(ib_srp_transport_template); |
c1a0b23b | 2182 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 RD |
2183 | class_unregister(&srp_class); |
2184 | return ret; | |
2185 | } | |
2186 | ||
2187 | return 0; | |
2188 | } | |
2189 | ||
2190 | static void __exit srp_cleanup_module(void) | |
2191 | { | |
2192 | ib_unregister_client(&srp_client); | |
c1a0b23b | 2193 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 | 2194 | class_unregister(&srp_class); |
3236822b | 2195 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2196 | } |
2197 | ||
2198 | module_init(srp_init_module); | |
2199 | module_exit(srp_cleanup_module); |