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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. | |
aef9ec39 RD |
31 | */ |
32 | ||
aef9ec39 RD |
33 | #include <linux/module.h> |
34 | #include <linux/init.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/err.h> | |
37 | #include <linux/string.h> | |
38 | #include <linux/parser.h> | |
39 | #include <linux/random.h> | |
de25968c | 40 | #include <linux/jiffies.h> |
aef9ec39 RD |
41 | |
42 | #include <asm/atomic.h> | |
43 | ||
44 | #include <scsi/scsi.h> | |
45 | #include <scsi/scsi_device.h> | |
46 | #include <scsi/scsi_dbg.h> | |
47 | #include <scsi/srp.h> | |
3236822b | 48 | #include <scsi/scsi_transport_srp.h> |
aef9ec39 | 49 | |
aef9ec39 RD |
50 | #include "ib_srp.h" |
51 | ||
52 | #define DRV_NAME "ib_srp" | |
53 | #define PFX DRV_NAME ": " | |
54 | #define DRV_VERSION "0.2" | |
55 | #define DRV_RELDATE "November 1, 2005" | |
56 | ||
57 | MODULE_AUTHOR("Roland Dreier"); | |
58 | MODULE_DESCRIPTION("InfiniBand SCSI RDMA Protocol initiator " | |
59 | "v" DRV_VERSION " (" DRV_RELDATE ")"); | |
60 | MODULE_LICENSE("Dual BSD/GPL"); | |
61 | ||
74b0a15b VP |
62 | static int srp_sg_tablesize = SRP_DEF_SG_TABLESIZE; |
63 | static int srp_max_iu_len; | |
64 | ||
65 | module_param(srp_sg_tablesize, int, 0444); | |
66 | MODULE_PARM_DESC(srp_sg_tablesize, | |
1e89a194 | 67 | "Max number of gather/scatter entries per I/O (default is 12, max 255)"); |
74b0a15b | 68 | |
aef9ec39 RD |
69 | static int topspin_workarounds = 1; |
70 | ||
71 | module_param(topspin_workarounds, int, 0444); | |
72 | MODULE_PARM_DESC(topspin_workarounds, | |
73 | "Enable workarounds for Topspin/Cisco SRP target bugs if != 0"); | |
74 | ||
559ce8f1 IR |
75 | static int mellanox_workarounds = 1; |
76 | ||
77 | module_param(mellanox_workarounds, int, 0444); | |
78 | MODULE_PARM_DESC(mellanox_workarounds, | |
79 | "Enable workarounds for Mellanox SRP target bugs if != 0"); | |
80 | ||
aef9ec39 RD |
81 | static void srp_add_one(struct ib_device *device); |
82 | static void srp_remove_one(struct ib_device *device); | |
9c03dc9f BVA |
83 | static void srp_recv_completion(struct ib_cq *cq, void *target_ptr); |
84 | static void srp_send_completion(struct ib_cq *cq, void *target_ptr); | |
aef9ec39 RD |
85 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event); |
86 | ||
3236822b FT |
87 | static struct scsi_transport_template *ib_srp_transport_template; |
88 | ||
aef9ec39 RD |
89 | static struct ib_client srp_client = { |
90 | .name = "srp", | |
91 | .add = srp_add_one, | |
92 | .remove = srp_remove_one | |
93 | }; | |
94 | ||
c1a0b23b MT |
95 | static struct ib_sa_client srp_sa_client; |
96 | ||
aef9ec39 RD |
97 | static inline struct srp_target_port *host_to_target(struct Scsi_Host *host) |
98 | { | |
99 | return (struct srp_target_port *) host->hostdata; | |
100 | } | |
101 | ||
102 | static const char *srp_target_info(struct Scsi_Host *host) | |
103 | { | |
104 | return host_to_target(host)->target_name; | |
105 | } | |
106 | ||
5d7cbfd6 RD |
107 | static int srp_target_is_topspin(struct srp_target_port *target) |
108 | { | |
109 | static const u8 topspin_oui[3] = { 0x00, 0x05, 0xad }; | |
3d1ff48d | 110 | static const u8 cisco_oui[3] = { 0x00, 0x1b, 0x0d }; |
5d7cbfd6 RD |
111 | |
112 | return topspin_workarounds && | |
3d1ff48d RK |
113 | (!memcmp(&target->ioc_guid, topspin_oui, sizeof topspin_oui) || |
114 | !memcmp(&target->ioc_guid, cisco_oui, sizeof cisco_oui)); | |
5d7cbfd6 RD |
115 | } |
116 | ||
117 | static int srp_target_is_mellanox(struct srp_target_port *target) | |
118 | { | |
119 | static const u8 mellanox_oui[3] = { 0x00, 0x02, 0xc9 }; | |
120 | ||
121 | return mellanox_workarounds && | |
122 | !memcmp(&target->ioc_guid, mellanox_oui, sizeof mellanox_oui); | |
123 | } | |
124 | ||
aef9ec39 RD |
125 | static struct srp_iu *srp_alloc_iu(struct srp_host *host, size_t size, |
126 | gfp_t gfp_mask, | |
127 | enum dma_data_direction direction) | |
128 | { | |
129 | struct srp_iu *iu; | |
130 | ||
131 | iu = kmalloc(sizeof *iu, gfp_mask); | |
132 | if (!iu) | |
133 | goto out; | |
134 | ||
135 | iu->buf = kzalloc(size, gfp_mask); | |
136 | if (!iu->buf) | |
137 | goto out_free_iu; | |
138 | ||
05321937 GKH |
139 | iu->dma = ib_dma_map_single(host->srp_dev->dev, iu->buf, size, |
140 | direction); | |
141 | if (ib_dma_mapping_error(host->srp_dev->dev, iu->dma)) | |
aef9ec39 RD |
142 | goto out_free_buf; |
143 | ||
144 | iu->size = size; | |
145 | iu->direction = direction; | |
146 | ||
147 | return iu; | |
148 | ||
149 | out_free_buf: | |
150 | kfree(iu->buf); | |
151 | out_free_iu: | |
152 | kfree(iu); | |
153 | out: | |
154 | return NULL; | |
155 | } | |
156 | ||
157 | static void srp_free_iu(struct srp_host *host, struct srp_iu *iu) | |
158 | { | |
159 | if (!iu) | |
160 | return; | |
161 | ||
05321937 GKH |
162 | ib_dma_unmap_single(host->srp_dev->dev, iu->dma, iu->size, |
163 | iu->direction); | |
aef9ec39 RD |
164 | kfree(iu->buf); |
165 | kfree(iu); | |
166 | } | |
167 | ||
168 | static void srp_qp_event(struct ib_event *event, void *context) | |
169 | { | |
170 | printk(KERN_ERR PFX "QP event %d\n", event->event); | |
171 | } | |
172 | ||
173 | static int srp_init_qp(struct srp_target_port *target, | |
174 | struct ib_qp *qp) | |
175 | { | |
176 | struct ib_qp_attr *attr; | |
177 | int ret; | |
178 | ||
179 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
180 | if (!attr) | |
181 | return -ENOMEM; | |
182 | ||
969a60f9 RD |
183 | ret = ib_find_pkey(target->srp_host->srp_dev->dev, |
184 | target->srp_host->port, | |
185 | be16_to_cpu(target->path.pkey), | |
186 | &attr->pkey_index); | |
aef9ec39 RD |
187 | if (ret) |
188 | goto out; | |
189 | ||
190 | attr->qp_state = IB_QPS_INIT; | |
191 | attr->qp_access_flags = (IB_ACCESS_REMOTE_READ | | |
192 | IB_ACCESS_REMOTE_WRITE); | |
193 | attr->port_num = target->srp_host->port; | |
194 | ||
195 | ret = ib_modify_qp(qp, attr, | |
196 | IB_QP_STATE | | |
197 | IB_QP_PKEY_INDEX | | |
198 | IB_QP_ACCESS_FLAGS | | |
199 | IB_QP_PORT); | |
200 | ||
201 | out: | |
202 | kfree(attr); | |
203 | return ret; | |
204 | } | |
205 | ||
9fe4bcf4 DD |
206 | static int srp_new_cm_id(struct srp_target_port *target) |
207 | { | |
208 | struct ib_cm_id *new_cm_id; | |
209 | ||
05321937 | 210 | new_cm_id = ib_create_cm_id(target->srp_host->srp_dev->dev, |
9fe4bcf4 DD |
211 | srp_cm_handler, target); |
212 | if (IS_ERR(new_cm_id)) | |
213 | return PTR_ERR(new_cm_id); | |
214 | ||
215 | if (target->cm_id) | |
216 | ib_destroy_cm_id(target->cm_id); | |
217 | target->cm_id = new_cm_id; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
aef9ec39 RD |
222 | static int srp_create_target_ib(struct srp_target_port *target) |
223 | { | |
224 | struct ib_qp_init_attr *init_attr; | |
225 | int ret; | |
226 | ||
227 | init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); | |
228 | if (!init_attr) | |
229 | return -ENOMEM; | |
230 | ||
9c03dc9f BVA |
231 | target->recv_cq = ib_create_cq(target->srp_host->srp_dev->dev, |
232 | srp_recv_completion, NULL, target, SRP_RQ_SIZE, 0); | |
233 | if (IS_ERR(target->recv_cq)) { | |
234 | ret = PTR_ERR(target->recv_cq); | |
da9d2f07 | 235 | goto err; |
aef9ec39 RD |
236 | } |
237 | ||
9c03dc9f BVA |
238 | target->send_cq = ib_create_cq(target->srp_host->srp_dev->dev, |
239 | srp_send_completion, NULL, target, SRP_SQ_SIZE, 0); | |
240 | if (IS_ERR(target->send_cq)) { | |
241 | ret = PTR_ERR(target->send_cq); | |
da9d2f07 | 242 | goto err_recv_cq; |
9c03dc9f BVA |
243 | } |
244 | ||
245 | ib_req_notify_cq(target->recv_cq, IB_CQ_NEXT_COMP); | |
aef9ec39 RD |
246 | |
247 | init_attr->event_handler = srp_qp_event; | |
248 | init_attr->cap.max_send_wr = SRP_SQ_SIZE; | |
249 | init_attr->cap.max_recv_wr = SRP_RQ_SIZE; | |
250 | init_attr->cap.max_recv_sge = 1; | |
251 | init_attr->cap.max_send_sge = 1; | |
252 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
253 | init_attr->qp_type = IB_QPT_RC; | |
9c03dc9f BVA |
254 | init_attr->send_cq = target->send_cq; |
255 | init_attr->recv_cq = target->recv_cq; | |
aef9ec39 | 256 | |
05321937 | 257 | target->qp = ib_create_qp(target->srp_host->srp_dev->pd, init_attr); |
aef9ec39 RD |
258 | if (IS_ERR(target->qp)) { |
259 | ret = PTR_ERR(target->qp); | |
da9d2f07 | 260 | goto err_send_cq; |
aef9ec39 RD |
261 | } |
262 | ||
263 | ret = srp_init_qp(target, target->qp); | |
da9d2f07 RD |
264 | if (ret) |
265 | goto err_qp; | |
aef9ec39 | 266 | |
da9d2f07 RD |
267 | kfree(init_attr); |
268 | return 0; | |
269 | ||
270 | err_qp: | |
271 | ib_destroy_qp(target->qp); | |
272 | ||
273 | err_send_cq: | |
274 | ib_destroy_cq(target->send_cq); | |
275 | ||
276 | err_recv_cq: | |
277 | ib_destroy_cq(target->recv_cq); | |
278 | ||
279 | err: | |
aef9ec39 RD |
280 | kfree(init_attr); |
281 | return ret; | |
282 | } | |
283 | ||
284 | static void srp_free_target_ib(struct srp_target_port *target) | |
285 | { | |
286 | int i; | |
287 | ||
288 | ib_destroy_qp(target->qp); | |
9c03dc9f BVA |
289 | ib_destroy_cq(target->send_cq); |
290 | ib_destroy_cq(target->recv_cq); | |
aef9ec39 RD |
291 | |
292 | for (i = 0; i < SRP_RQ_SIZE; ++i) | |
293 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
dd5e6e38 | 294 | for (i = 0; i < SRP_SQ_SIZE; ++i) |
aef9ec39 RD |
295 | srp_free_iu(target->srp_host, target->tx_ring[i]); |
296 | } | |
297 | ||
298 | static void srp_path_rec_completion(int status, | |
299 | struct ib_sa_path_rec *pathrec, | |
300 | void *target_ptr) | |
301 | { | |
302 | struct srp_target_port *target = target_ptr; | |
303 | ||
304 | target->status = status; | |
305 | if (status) | |
7aa54bd7 DD |
306 | shost_printk(KERN_ERR, target->scsi_host, |
307 | PFX "Got failed path rec status %d\n", status); | |
aef9ec39 RD |
308 | else |
309 | target->path = *pathrec; | |
310 | complete(&target->done); | |
311 | } | |
312 | ||
313 | static int srp_lookup_path(struct srp_target_port *target) | |
314 | { | |
315 | target->path.numb_path = 1; | |
316 | ||
317 | init_completion(&target->done); | |
318 | ||
c1a0b23b | 319 | target->path_query_id = ib_sa_path_rec_get(&srp_sa_client, |
05321937 | 320 | target->srp_host->srp_dev->dev, |
aef9ec39 RD |
321 | target->srp_host->port, |
322 | &target->path, | |
247e020e | 323 | IB_SA_PATH_REC_SERVICE_ID | |
aef9ec39 RD |
324 | IB_SA_PATH_REC_DGID | |
325 | IB_SA_PATH_REC_SGID | | |
326 | IB_SA_PATH_REC_NUMB_PATH | | |
327 | IB_SA_PATH_REC_PKEY, | |
328 | SRP_PATH_REC_TIMEOUT_MS, | |
329 | GFP_KERNEL, | |
330 | srp_path_rec_completion, | |
331 | target, &target->path_query); | |
332 | if (target->path_query_id < 0) | |
333 | return target->path_query_id; | |
334 | ||
335 | wait_for_completion(&target->done); | |
336 | ||
337 | if (target->status < 0) | |
7aa54bd7 DD |
338 | shost_printk(KERN_WARNING, target->scsi_host, |
339 | PFX "Path record query failed\n"); | |
aef9ec39 RD |
340 | |
341 | return target->status; | |
342 | } | |
343 | ||
344 | static int srp_send_req(struct srp_target_port *target) | |
345 | { | |
346 | struct { | |
347 | struct ib_cm_req_param param; | |
348 | struct srp_login_req priv; | |
349 | } *req = NULL; | |
350 | int status; | |
351 | ||
352 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
353 | if (!req) | |
354 | return -ENOMEM; | |
355 | ||
356 | req->param.primary_path = &target->path; | |
357 | req->param.alternate_path = NULL; | |
358 | req->param.service_id = target->service_id; | |
359 | req->param.qp_num = target->qp->qp_num; | |
360 | req->param.qp_type = target->qp->qp_type; | |
361 | req->param.private_data = &req->priv; | |
362 | req->param.private_data_len = sizeof req->priv; | |
363 | req->param.flow_control = 1; | |
364 | ||
365 | get_random_bytes(&req->param.starting_psn, 4); | |
366 | req->param.starting_psn &= 0xffffff; | |
367 | ||
368 | /* | |
369 | * Pick some arbitrary defaults here; we could make these | |
370 | * module parameters if anyone cared about setting them. | |
371 | */ | |
372 | req->param.responder_resources = 4; | |
373 | req->param.remote_cm_response_timeout = 20; | |
374 | req->param.local_cm_response_timeout = 20; | |
375 | req->param.retry_count = 7; | |
376 | req->param.rnr_retry_count = 7; | |
377 | req->param.max_cm_retries = 15; | |
378 | ||
379 | req->priv.opcode = SRP_LOGIN_REQ; | |
380 | req->priv.tag = 0; | |
74b0a15b | 381 | req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); |
aef9ec39 RD |
382 | req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | |
383 | SRP_BUF_FORMAT_INDIRECT); | |
0c0450db | 384 | /* |
3cd96564 | 385 | * In the published SRP specification (draft rev. 16a), the |
0c0450db R |
386 | * port identifier format is 8 bytes of ID extension followed |
387 | * by 8 bytes of GUID. Older drafts put the two halves in the | |
388 | * opposite order, so that the GUID comes first. | |
389 | * | |
390 | * Targets conforming to these obsolete drafts can be | |
391 | * recognized by the I/O Class they report. | |
392 | */ | |
393 | if (target->io_class == SRP_REV10_IB_IO_CLASS) { | |
394 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb | 395 | &target->path.sgid.global.interface_id, 8); |
0c0450db | 396 | memcpy(req->priv.initiator_port_id + 8, |
01cb9bcb | 397 | &target->initiator_ext, 8); |
0c0450db R |
398 | memcpy(req->priv.target_port_id, &target->ioc_guid, 8); |
399 | memcpy(req->priv.target_port_id + 8, &target->id_ext, 8); | |
400 | } else { | |
401 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb IR |
402 | &target->initiator_ext, 8); |
403 | memcpy(req->priv.initiator_port_id + 8, | |
404 | &target->path.sgid.global.interface_id, 8); | |
0c0450db R |
405 | memcpy(req->priv.target_port_id, &target->id_ext, 8); |
406 | memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); | |
407 | } | |
408 | ||
aef9ec39 RD |
409 | /* |
410 | * Topspin/Cisco SRP targets will reject our login unless we | |
01cb9bcb IR |
411 | * zero out the first 8 bytes of our initiator port ID and set |
412 | * the second 8 bytes to the local node GUID. | |
aef9ec39 | 413 | */ |
5d7cbfd6 | 414 | if (srp_target_is_topspin(target)) { |
7aa54bd7 DD |
415 | shost_printk(KERN_DEBUG, target->scsi_host, |
416 | PFX "Topspin/Cisco initiator port ID workaround " | |
417 | "activated for target GUID %016llx\n", | |
418 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
aef9ec39 | 419 | memset(req->priv.initiator_port_id, 0, 8); |
01cb9bcb | 420 | memcpy(req->priv.initiator_port_id + 8, |
05321937 | 421 | &target->srp_host->srp_dev->dev->node_guid, 8); |
aef9ec39 | 422 | } |
aef9ec39 RD |
423 | |
424 | status = ib_send_cm_req(target->cm_id, &req->param); | |
425 | ||
426 | kfree(req); | |
427 | ||
428 | return status; | |
429 | } | |
430 | ||
431 | static void srp_disconnect_target(struct srp_target_port *target) | |
432 | { | |
433 | /* XXX should send SRP_I_LOGOUT request */ | |
434 | ||
435 | init_completion(&target->done); | |
e6581056 | 436 | if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { |
7aa54bd7 DD |
437 | shost_printk(KERN_DEBUG, target->scsi_host, |
438 | PFX "Sending CM DREQ failed\n"); | |
e6581056 RD |
439 | return; |
440 | } | |
aef9ec39 RD |
441 | wait_for_completion(&target->done); |
442 | } | |
443 | ||
9709f0e0 BVA |
444 | static bool srp_change_state(struct srp_target_port *target, |
445 | enum srp_target_state old, | |
446 | enum srp_target_state new) | |
447 | { | |
448 | bool changed = false; | |
449 | ||
450 | spin_lock_irq(target->scsi_host->host_lock); | |
451 | if (target->state == old) { | |
452 | target->state = new; | |
453 | changed = true; | |
454 | } | |
455 | spin_unlock_irq(target->scsi_host->host_lock); | |
456 | return changed; | |
457 | } | |
458 | ||
c4028958 | 459 | static void srp_remove_work(struct work_struct *work) |
aef9ec39 | 460 | { |
c4028958 DH |
461 | struct srp_target_port *target = |
462 | container_of(work, struct srp_target_port, work); | |
aef9ec39 | 463 | |
9709f0e0 | 464 | if (!srp_change_state(target, SRP_TARGET_DEAD, SRP_TARGET_REMOVED)) |
aef9ec39 | 465 | return; |
aef9ec39 | 466 | |
b3589fd4 | 467 | spin_lock(&target->srp_host->target_lock); |
aef9ec39 | 468 | list_del(&target->list); |
b3589fd4 | 469 | spin_unlock(&target->srp_host->target_lock); |
aef9ec39 | 470 | |
3236822b | 471 | srp_remove_host(target->scsi_host); |
aef9ec39 RD |
472 | scsi_remove_host(target->scsi_host); |
473 | ib_destroy_cm_id(target->cm_id); | |
474 | srp_free_target_ib(target); | |
475 | scsi_host_put(target->scsi_host); | |
aef9ec39 RD |
476 | } |
477 | ||
478 | static int srp_connect_target(struct srp_target_port *target) | |
479 | { | |
9fe4bcf4 | 480 | int retries = 3; |
aef9ec39 RD |
481 | int ret; |
482 | ||
483 | ret = srp_lookup_path(target); | |
484 | if (ret) | |
485 | return ret; | |
486 | ||
487 | while (1) { | |
488 | init_completion(&target->done); | |
489 | ret = srp_send_req(target); | |
490 | if (ret) | |
491 | return ret; | |
492 | wait_for_completion(&target->done); | |
493 | ||
494 | /* | |
495 | * The CM event handling code will set status to | |
496 | * SRP_PORT_REDIRECT if we get a port redirect REJ | |
497 | * back, or SRP_DLID_REDIRECT if we get a lid/qp | |
498 | * redirect REJ back. | |
499 | */ | |
500 | switch (target->status) { | |
501 | case 0: | |
502 | return 0; | |
503 | ||
504 | case SRP_PORT_REDIRECT: | |
505 | ret = srp_lookup_path(target); | |
506 | if (ret) | |
507 | return ret; | |
508 | break; | |
509 | ||
510 | case SRP_DLID_REDIRECT: | |
511 | break; | |
512 | ||
9fe4bcf4 DD |
513 | case SRP_STALE_CONN: |
514 | /* Our current CM id was stale, and is now in timewait. | |
515 | * Try to reconnect with a new one. | |
516 | */ | |
517 | if (!retries-- || srp_new_cm_id(target)) { | |
518 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
519 | "giving up on stale connection\n"); | |
520 | target->status = -ECONNRESET; | |
521 | return target->status; | |
522 | } | |
523 | ||
524 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
525 | "retrying stale connection\n"); | |
526 | break; | |
527 | ||
aef9ec39 RD |
528 | default: |
529 | return target->status; | |
530 | } | |
531 | } | |
532 | } | |
533 | ||
d945e1df RD |
534 | static void srp_unmap_data(struct scsi_cmnd *scmnd, |
535 | struct srp_target_port *target, | |
536 | struct srp_request *req) | |
537 | { | |
bb350d1d | 538 | if (!scsi_sglist(scmnd) || |
d945e1df RD |
539 | (scmnd->sc_data_direction != DMA_TO_DEVICE && |
540 | scmnd->sc_data_direction != DMA_FROM_DEVICE)) | |
541 | return; | |
542 | ||
f5358a17 RD |
543 | if (req->fmr) { |
544 | ib_fmr_pool_unmap(req->fmr); | |
545 | req->fmr = NULL; | |
546 | } | |
547 | ||
05321937 | 548 | ib_dma_unmap_sg(target->srp_host->srp_dev->dev, scsi_sglist(scmnd), |
bb350d1d | 549 | scsi_sg_count(scmnd), scmnd->sc_data_direction); |
d945e1df RD |
550 | } |
551 | ||
526b4caa IR |
552 | static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) |
553 | { | |
554 | srp_unmap_data(req->scmnd, target, req); | |
f8b6e31e | 555 | req->scmnd = NULL; |
536ae14e | 556 | list_add_tail(&req->list, &target->free_reqs); |
526b4caa IR |
557 | } |
558 | ||
559 | static void srp_reset_req(struct srp_target_port *target, struct srp_request *req) | |
560 | { | |
561 | req->scmnd->result = DID_RESET << 16; | |
562 | req->scmnd->scsi_done(req->scmnd); | |
563 | srp_remove_req(target, req); | |
564 | } | |
565 | ||
aef9ec39 RD |
566 | static int srp_reconnect_target(struct srp_target_port *target) |
567 | { | |
aef9ec39 | 568 | struct ib_qp_attr qp_attr; |
aef9ec39 | 569 | struct ib_wc wc; |
dcb4cb85 | 570 | int i, ret; |
aef9ec39 | 571 | |
9709f0e0 | 572 | if (!srp_change_state(target, SRP_TARGET_LIVE, SRP_TARGET_CONNECTING)) |
aef9ec39 | 573 | return -EAGAIN; |
aef9ec39 RD |
574 | |
575 | srp_disconnect_target(target); | |
576 | /* | |
577 | * Now get a new local CM ID so that we avoid confusing the | |
578 | * target in case things are really fouled up. | |
579 | */ | |
9fe4bcf4 DD |
580 | ret = srp_new_cm_id(target); |
581 | if (ret) | |
aef9ec39 | 582 | goto err; |
aef9ec39 RD |
583 | |
584 | qp_attr.qp_state = IB_QPS_RESET; | |
585 | ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); | |
586 | if (ret) | |
587 | goto err; | |
588 | ||
589 | ret = srp_init_qp(target, target->qp); | |
590 | if (ret) | |
591 | goto err; | |
592 | ||
9c03dc9f BVA |
593 | while (ib_poll_cq(target->recv_cq, 1, &wc) > 0) |
594 | ; /* nothing */ | |
595 | while (ib_poll_cq(target->send_cq, 1, &wc) > 0) | |
aef9ec39 RD |
596 | ; /* nothing */ |
597 | ||
d916a8f1 | 598 | spin_lock_irq(target->scsi_host->host_lock); |
536ae14e BVA |
599 | for (i = 0; i < SRP_CMD_SQ_SIZE; ++i) { |
600 | struct srp_request *req = &target->req_ring[i]; | |
601 | if (req->scmnd) | |
602 | srp_reset_req(target, req); | |
603 | } | |
d916a8f1 | 604 | spin_unlock_irq(target->scsi_host->host_lock); |
aef9ec39 | 605 | |
536ae14e | 606 | INIT_LIST_HEAD(&target->free_tx); |
dcb4cb85 | 607 | for (i = 0; i < SRP_SQ_SIZE; ++i) |
536ae14e | 608 | list_add(&target->tx_ring[i]->list, &target->free_tx); |
aef9ec39 | 609 | |
1033ff67 | 610 | target->qp_in_error = 0; |
aef9ec39 RD |
611 | ret = srp_connect_target(target); |
612 | if (ret) | |
613 | goto err; | |
614 | ||
9709f0e0 | 615 | if (!srp_change_state(target, SRP_TARGET_CONNECTING, SRP_TARGET_LIVE)) |
aef9ec39 | 616 | ret = -EAGAIN; |
aef9ec39 RD |
617 | |
618 | return ret; | |
619 | ||
620 | err: | |
7aa54bd7 DD |
621 | shost_printk(KERN_ERR, target->scsi_host, |
622 | PFX "reconnect failed (%d), removing target port.\n", ret); | |
aef9ec39 RD |
623 | |
624 | /* | |
625 | * We couldn't reconnect, so kill our target port off. | |
9709f0e0 BVA |
626 | * However, we have to defer the real removal because we |
627 | * are in the context of the SCSI error handler now, which | |
628 | * will deadlock if we call scsi_remove_host(). | |
629 | * | |
630 | * Schedule our work inside the lock to avoid a race with | |
631 | * the flush_scheduled_work() in srp_remove_one(). | |
aef9ec39 RD |
632 | */ |
633 | spin_lock_irq(target->scsi_host->host_lock); | |
634 | if (target->state == SRP_TARGET_CONNECTING) { | |
635 | target->state = SRP_TARGET_DEAD; | |
c4028958 | 636 | INIT_WORK(&target->work, srp_remove_work); |
aef9ec39 RD |
637 | schedule_work(&target->work); |
638 | } | |
639 | spin_unlock_irq(target->scsi_host->host_lock); | |
640 | ||
641 | return ret; | |
642 | } | |
643 | ||
559ce8f1 | 644 | static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat, |
f5358a17 RD |
645 | int sg_cnt, struct srp_request *req, |
646 | struct srp_direct_buf *buf) | |
647 | { | |
648 | u64 io_addr = 0; | |
649 | u64 *dma_pages; | |
650 | u32 len; | |
651 | int page_cnt; | |
652 | int i, j; | |
653 | int ret; | |
05321937 | 654 | struct srp_device *dev = target->srp_host->srp_dev; |
85507bcc | 655 | struct ib_device *ibdev = dev->dev; |
bb350d1d | 656 | struct scatterlist *sg; |
f5358a17 RD |
657 | |
658 | if (!dev->fmr_pool) | |
659 | return -ENODEV; | |
660 | ||
5d7cbfd6 RD |
661 | if (srp_target_is_mellanox(target) && |
662 | (ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask)) | |
559ce8f1 IR |
663 | return -EINVAL; |
664 | ||
f5358a17 | 665 | len = page_cnt = 0; |
bb350d1d FT |
666 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
667 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 668 | |
bb350d1d | 669 | if (ib_sg_dma_address(ibdev, sg) & ~dev->fmr_page_mask) { |
f5358a17 RD |
670 | if (i > 0) |
671 | return -EINVAL; | |
672 | else | |
673 | ++page_cnt; | |
674 | } | |
bb350d1d | 675 | if ((ib_sg_dma_address(ibdev, sg) + dma_len) & |
f5358a17 RD |
676 | ~dev->fmr_page_mask) { |
677 | if (i < sg_cnt - 1) | |
678 | return -EINVAL; | |
679 | else | |
680 | ++page_cnt; | |
681 | } | |
682 | ||
85507bcc | 683 | len += dma_len; |
f5358a17 RD |
684 | } |
685 | ||
686 | page_cnt += len >> dev->fmr_page_shift; | |
687 | if (page_cnt > SRP_FMR_SIZE) | |
688 | return -ENOMEM; | |
689 | ||
690 | dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); | |
691 | if (!dma_pages) | |
692 | return -ENOMEM; | |
693 | ||
694 | page_cnt = 0; | |
bb350d1d FT |
695 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
696 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc RC |
697 | |
698 | for (j = 0; j < dma_len; j += dev->fmr_page_size) | |
f5358a17 | 699 | dma_pages[page_cnt++] = |
bb350d1d | 700 | (ib_sg_dma_address(ibdev, sg) & |
85507bcc RC |
701 | dev->fmr_page_mask) + j; |
702 | } | |
f5358a17 RD |
703 | |
704 | req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, | |
adfaa888 | 705 | dma_pages, page_cnt, io_addr); |
f5358a17 RD |
706 | if (IS_ERR(req->fmr)) { |
707 | ret = PTR_ERR(req->fmr); | |
6583eb3d | 708 | req->fmr = NULL; |
f5358a17 RD |
709 | goto out; |
710 | } | |
711 | ||
85507bcc RC |
712 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) & |
713 | ~dev->fmr_page_mask); | |
f5358a17 RD |
714 | buf->key = cpu_to_be32(req->fmr->fmr->rkey); |
715 | buf->len = cpu_to_be32(len); | |
716 | ||
717 | ret = 0; | |
718 | ||
719 | out: | |
720 | kfree(dma_pages); | |
721 | ||
722 | return ret; | |
723 | } | |
724 | ||
aef9ec39 RD |
725 | static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, |
726 | struct srp_request *req) | |
727 | { | |
cf368713 | 728 | struct scatterlist *scat; |
aef9ec39 | 729 | struct srp_cmd *cmd = req->cmd->buf; |
cf368713 | 730 | int len, nents, count; |
f5358a17 | 731 | u8 fmt = SRP_DATA_DESC_DIRECT; |
85507bcc RC |
732 | struct srp_device *dev; |
733 | struct ib_device *ibdev; | |
aef9ec39 | 734 | |
bb350d1d | 735 | if (!scsi_sglist(scmnd) || scmnd->sc_data_direction == DMA_NONE) |
aef9ec39 RD |
736 | return sizeof (struct srp_cmd); |
737 | ||
738 | if (scmnd->sc_data_direction != DMA_FROM_DEVICE && | |
739 | scmnd->sc_data_direction != DMA_TO_DEVICE) { | |
7aa54bd7 DD |
740 | shost_printk(KERN_WARNING, target->scsi_host, |
741 | PFX "Unhandled data direction %d\n", | |
742 | scmnd->sc_data_direction); | |
aef9ec39 RD |
743 | return -EINVAL; |
744 | } | |
745 | ||
bb350d1d FT |
746 | nents = scsi_sg_count(scmnd); |
747 | scat = scsi_sglist(scmnd); | |
aef9ec39 | 748 | |
05321937 | 749 | dev = target->srp_host->srp_dev; |
85507bcc RC |
750 | ibdev = dev->dev; |
751 | ||
752 | count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction); | |
f5358a17 RD |
753 | |
754 | fmt = SRP_DATA_DESC_DIRECT; | |
755 | len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); | |
aef9ec39 | 756 | |
cf368713 | 757 | if (count == 1) { |
f5358a17 RD |
758 | /* |
759 | * The midlayer only generated a single gather/scatter | |
760 | * entry, or DMA mapping coalesced everything to a | |
761 | * single entry. So a direct descriptor along with | |
762 | * the DMA MR suffices. | |
763 | */ | |
cf368713 | 764 | struct srp_direct_buf *buf = (void *) cmd->add_data; |
aef9ec39 | 765 | |
85507bcc RC |
766 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat)); |
767 | buf->key = cpu_to_be32(dev->mr->rkey); | |
768 | buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat)); | |
559ce8f1 | 769 | } else if (srp_map_fmr(target, scat, count, req, |
f5358a17 RD |
770 | (void *) cmd->add_data)) { |
771 | /* | |
772 | * FMR mapping failed, and the scatterlist has more | |
773 | * than one entry. Generate an indirect memory | |
774 | * descriptor. | |
775 | */ | |
cf368713 | 776 | struct srp_indirect_buf *buf = (void *) cmd->add_data; |
bb350d1d | 777 | struct scatterlist *sg; |
cf368713 | 778 | u32 datalen = 0; |
f5358a17 | 779 | int i; |
aef9ec39 | 780 | |
cf368713 | 781 | fmt = SRP_DATA_DESC_INDIRECT; |
f5358a17 RD |
782 | len = sizeof (struct srp_cmd) + |
783 | sizeof (struct srp_indirect_buf) + | |
784 | count * sizeof (struct srp_direct_buf); | |
785 | ||
bb350d1d FT |
786 | scsi_for_each_sg(scmnd, sg, count, i) { |
787 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 788 | |
f5358a17 | 789 | buf->desc_list[i].va = |
bb350d1d | 790 | cpu_to_be64(ib_sg_dma_address(ibdev, sg)); |
f5358a17 | 791 | buf->desc_list[i].key = |
85507bcc RC |
792 | cpu_to_be32(dev->mr->rkey); |
793 | buf->desc_list[i].len = cpu_to_be32(dma_len); | |
794 | datalen += dma_len; | |
f5358a17 | 795 | } |
aef9ec39 | 796 | |
cf368713 RD |
797 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) |
798 | cmd->data_out_desc_cnt = count; | |
799 | else | |
800 | cmd->data_in_desc_cnt = count; | |
801 | ||
f5358a17 RD |
802 | buf->table_desc.va = |
803 | cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); | |
cf368713 | 804 | buf->table_desc.key = |
05321937 | 805 | cpu_to_be32(target->srp_host->srp_dev->mr->rkey); |
cf368713 RD |
806 | buf->table_desc.len = |
807 | cpu_to_be32(count * sizeof (struct srp_direct_buf)); | |
808 | ||
cf368713 | 809 | buf->len = cpu_to_be32(datalen); |
aef9ec39 RD |
810 | } |
811 | ||
812 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) | |
813 | cmd->buf_fmt = fmt << 4; | |
814 | else | |
815 | cmd->buf_fmt = fmt; | |
816 | ||
aef9ec39 RD |
817 | return len; |
818 | } | |
819 | ||
05a1d750 DD |
820 | /* |
821 | * Must be called with target->scsi_host->host_lock held to protect | |
dcb4cb85 | 822 | * req_lim and free_tx. Lock cannot be dropped between call here and |
05a1d750 DD |
823 | * call to __srp_post_send(). |
824 | * | |
825 | * Note: | |
826 | * An upper limit for the number of allocated information units for each | |
827 | * request type is: | |
828 | * - SRP_IU_CMD: SRP_CMD_SQ_SIZE, since the SCSI mid-layer never queues | |
829 | * more than Scsi_Host.can_queue requests. | |
830 | * - SRP_IU_TSK_MGMT: SRP_TSK_MGMT_SQ_SIZE. | |
831 | * - SRP_IU_RSP: 1, since a conforming SRP target never sends more than | |
832 | * one unanswered SRP request to an initiator. | |
833 | */ | |
834 | static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target, | |
835 | enum srp_iu_type iu_type) | |
836 | { | |
837 | s32 rsv = (iu_type == SRP_IU_TSK_MGMT) ? 0 : SRP_TSK_MGMT_SQ_SIZE; | |
838 | struct srp_iu *iu; | |
839 | ||
840 | srp_send_completion(target->send_cq, target); | |
841 | ||
dcb4cb85 | 842 | if (list_empty(&target->free_tx)) |
05a1d750 DD |
843 | return NULL; |
844 | ||
845 | /* Initiator responses to target requests do not consume credits */ | |
846 | if (target->req_lim <= rsv && iu_type != SRP_IU_RSP) { | |
847 | ++target->zero_req_lim; | |
848 | return NULL; | |
849 | } | |
850 | ||
dcb4cb85 | 851 | iu = list_first_entry(&target->free_tx, struct srp_iu, list); |
05a1d750 DD |
852 | iu->type = iu_type; |
853 | return iu; | |
854 | } | |
855 | ||
856 | /* | |
857 | * Must be called with target->scsi_host->host_lock held to protect | |
dcb4cb85 | 858 | * req_lim and free_tx. |
05a1d750 DD |
859 | */ |
860 | static int __srp_post_send(struct srp_target_port *target, | |
861 | struct srp_iu *iu, int len) | |
862 | { | |
863 | struct ib_sge list; | |
864 | struct ib_send_wr wr, *bad_wr; | |
865 | int ret = 0; | |
866 | ||
867 | list.addr = iu->dma; | |
868 | list.length = len; | |
869 | list.lkey = target->srp_host->srp_dev->mr->lkey; | |
870 | ||
871 | wr.next = NULL; | |
dcb4cb85 | 872 | wr.wr_id = (uintptr_t) iu; |
05a1d750 DD |
873 | wr.sg_list = &list; |
874 | wr.num_sge = 1; | |
875 | wr.opcode = IB_WR_SEND; | |
876 | wr.send_flags = IB_SEND_SIGNALED; | |
877 | ||
878 | ret = ib_post_send(target->qp, &wr, &bad_wr); | |
879 | ||
880 | if (!ret) { | |
dcb4cb85 | 881 | list_del(&iu->list); |
05a1d750 DD |
882 | if (iu->type != SRP_IU_RSP) |
883 | --target->req_lim; | |
884 | } | |
885 | ||
886 | return ret; | |
887 | } | |
888 | ||
dcb4cb85 | 889 | static int srp_post_recv(struct srp_target_port *target, struct srp_iu *iu) |
c996bb47 | 890 | { |
c996bb47 | 891 | struct ib_recv_wr wr, *bad_wr; |
dcb4cb85 | 892 | struct ib_sge list; |
c996bb47 BVA |
893 | |
894 | list.addr = iu->dma; | |
895 | list.length = iu->size; | |
896 | list.lkey = target->srp_host->srp_dev->mr->lkey; | |
897 | ||
898 | wr.next = NULL; | |
dcb4cb85 | 899 | wr.wr_id = (uintptr_t) iu; |
c996bb47 BVA |
900 | wr.sg_list = &list; |
901 | wr.num_sge = 1; | |
902 | ||
dcb4cb85 | 903 | return ib_post_recv(target->qp, &wr, &bad_wr); |
c996bb47 BVA |
904 | } |
905 | ||
aef9ec39 RD |
906 | static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) |
907 | { | |
908 | struct srp_request *req; | |
909 | struct scsi_cmnd *scmnd; | |
910 | unsigned long flags; | |
911 | s32 delta; | |
912 | ||
913 | delta = (s32) be32_to_cpu(rsp->req_lim_delta); | |
914 | ||
915 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
916 | ||
917 | target->req_lim += delta; | |
918 | ||
aef9ec39 | 919 | if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { |
f8b6e31e DD |
920 | target->tsk_mgmt_status = -1; |
921 | if (be32_to_cpu(rsp->resp_data_len) >= 4) | |
922 | target->tsk_mgmt_status = rsp->data[3]; | |
923 | complete(&target->tsk_mgmt_done); | |
aef9ec39 | 924 | } else { |
f8b6e31e | 925 | req = &target->req_ring[rsp->tag]; |
d945e1df | 926 | scmnd = req->scmnd; |
aef9ec39 | 927 | if (!scmnd) |
7aa54bd7 DD |
928 | shost_printk(KERN_ERR, target->scsi_host, |
929 | "Null scmnd for RSP w/tag %016llx\n", | |
930 | (unsigned long long) rsp->tag); | |
aef9ec39 RD |
931 | scmnd->result = rsp->status; |
932 | ||
933 | if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { | |
934 | memcpy(scmnd->sense_buffer, rsp->data + | |
935 | be32_to_cpu(rsp->resp_data_len), | |
936 | min_t(int, be32_to_cpu(rsp->sense_data_len), | |
937 | SCSI_SENSE_BUFFERSIZE)); | |
938 | } | |
939 | ||
940 | if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) | |
bb350d1d | 941 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt)); |
aef9ec39 | 942 | else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) |
bb350d1d | 943 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt)); |
aef9ec39 | 944 | |
f8b6e31e DD |
945 | scmnd->host_scribble = NULL; |
946 | scmnd->scsi_done(scmnd); | |
947 | srp_remove_req(target, req); | |
aef9ec39 RD |
948 | } |
949 | ||
950 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
951 | } | |
952 | ||
bb12588a DD |
953 | static int srp_response_common(struct srp_target_port *target, s32 req_delta, |
954 | void *rsp, int len) | |
955 | { | |
956 | struct ib_device *dev; | |
957 | unsigned long flags; | |
958 | struct srp_iu *iu; | |
959 | int err = 1; | |
960 | ||
961 | dev = target->srp_host->srp_dev->dev; | |
962 | ||
963 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
964 | target->req_lim += req_delta; | |
965 | ||
966 | iu = __srp_get_tx_iu(target, SRP_IU_RSP); | |
967 | if (!iu) { | |
968 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
969 | "no IU available to send response\n"); | |
970 | goto out; | |
971 | } | |
972 | ||
973 | ib_dma_sync_single_for_cpu(dev, iu->dma, len, DMA_TO_DEVICE); | |
974 | memcpy(iu->buf, rsp, len); | |
975 | ib_dma_sync_single_for_device(dev, iu->dma, len, DMA_TO_DEVICE); | |
976 | ||
977 | err = __srp_post_send(target, iu, len); | |
978 | if (err) | |
979 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
980 | "unable to post response: %d\n", err); | |
981 | ||
982 | out: | |
983 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
984 | return err; | |
985 | } | |
986 | ||
987 | static void srp_process_cred_req(struct srp_target_port *target, | |
988 | struct srp_cred_req *req) | |
989 | { | |
990 | struct srp_cred_rsp rsp = { | |
991 | .opcode = SRP_CRED_RSP, | |
992 | .tag = req->tag, | |
993 | }; | |
994 | s32 delta = be32_to_cpu(req->req_lim_delta); | |
995 | ||
996 | if (srp_response_common(target, delta, &rsp, sizeof rsp)) | |
997 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
998 | "problems processing SRP_CRED_REQ\n"); | |
999 | } | |
1000 | ||
1001 | static void srp_process_aer_req(struct srp_target_port *target, | |
1002 | struct srp_aer_req *req) | |
1003 | { | |
1004 | struct srp_aer_rsp rsp = { | |
1005 | .opcode = SRP_AER_RSP, | |
1006 | .tag = req->tag, | |
1007 | }; | |
1008 | s32 delta = be32_to_cpu(req->req_lim_delta); | |
1009 | ||
1010 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
1011 | "ignoring AER for LUN %llu\n", be64_to_cpu(req->lun)); | |
1012 | ||
1013 | if (srp_response_common(target, delta, &rsp, sizeof rsp)) | |
1014 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
1015 | "problems processing SRP_AER_REQ\n"); | |
1016 | } | |
1017 | ||
aef9ec39 RD |
1018 | static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) |
1019 | { | |
dcb4cb85 BVA |
1020 | struct ib_device *dev = target->srp_host->srp_dev->dev; |
1021 | struct srp_iu *iu = (struct srp_iu *) wc->wr_id; | |
c996bb47 | 1022 | int res; |
aef9ec39 RD |
1023 | u8 opcode; |
1024 | ||
85507bcc RC |
1025 | ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len, |
1026 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
1027 | |
1028 | opcode = *(u8 *) iu->buf; | |
1029 | ||
1030 | if (0) { | |
7aa54bd7 DD |
1031 | shost_printk(KERN_ERR, target->scsi_host, |
1032 | PFX "recv completion, opcode 0x%02x\n", opcode); | |
7a700811 BVA |
1033 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 8, 1, |
1034 | iu->buf, wc->byte_len, true); | |
aef9ec39 RD |
1035 | } |
1036 | ||
1037 | switch (opcode) { | |
1038 | case SRP_RSP: | |
1039 | srp_process_rsp(target, iu->buf); | |
1040 | break; | |
1041 | ||
bb12588a DD |
1042 | case SRP_CRED_REQ: |
1043 | srp_process_cred_req(target, iu->buf); | |
1044 | break; | |
1045 | ||
1046 | case SRP_AER_REQ: | |
1047 | srp_process_aer_req(target, iu->buf); | |
1048 | break; | |
1049 | ||
aef9ec39 RD |
1050 | case SRP_T_LOGOUT: |
1051 | /* XXX Handle target logout */ | |
7aa54bd7 DD |
1052 | shost_printk(KERN_WARNING, target->scsi_host, |
1053 | PFX "Got target logout request\n"); | |
aef9ec39 RD |
1054 | break; |
1055 | ||
1056 | default: | |
7aa54bd7 DD |
1057 | shost_printk(KERN_WARNING, target->scsi_host, |
1058 | PFX "Unhandled SRP opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
1059 | break; |
1060 | } | |
1061 | ||
85507bcc RC |
1062 | ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len, |
1063 | DMA_FROM_DEVICE); | |
c996bb47 | 1064 | |
dcb4cb85 | 1065 | res = srp_post_recv(target, iu); |
c996bb47 BVA |
1066 | if (res != 0) |
1067 | shost_printk(KERN_ERR, target->scsi_host, | |
1068 | PFX "Recv failed with error code %d\n", res); | |
aef9ec39 RD |
1069 | } |
1070 | ||
9c03dc9f | 1071 | static void srp_recv_completion(struct ib_cq *cq, void *target_ptr) |
aef9ec39 RD |
1072 | { |
1073 | struct srp_target_port *target = target_ptr; | |
1074 | struct ib_wc wc; | |
aef9ec39 RD |
1075 | |
1076 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
1077 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
1078 | if (wc.status) { | |
7aa54bd7 | 1079 | shost_printk(KERN_ERR, target->scsi_host, |
9c03dc9f | 1080 | PFX "failed receive status %d\n", |
7aa54bd7 | 1081 | wc.status); |
1033ff67 | 1082 | target->qp_in_error = 1; |
aef9ec39 RD |
1083 | break; |
1084 | } | |
1085 | ||
9c03dc9f BVA |
1086 | srp_handle_recv(target, &wc); |
1087 | } | |
1088 | } | |
1089 | ||
1090 | static void srp_send_completion(struct ib_cq *cq, void *target_ptr) | |
1091 | { | |
1092 | struct srp_target_port *target = target_ptr; | |
1093 | struct ib_wc wc; | |
dcb4cb85 | 1094 | struct srp_iu *iu; |
9c03dc9f BVA |
1095 | |
1096 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
1097 | if (wc.status) { | |
1098 | shost_printk(KERN_ERR, target->scsi_host, | |
1099 | PFX "failed send status %d\n", | |
1100 | wc.status); | |
1101 | target->qp_in_error = 1; | |
1102 | break; | |
1103 | } | |
1104 | ||
dcb4cb85 BVA |
1105 | iu = (struct srp_iu *) wc.wr_id; |
1106 | list_add(&iu->list, &target->free_tx); | |
aef9ec39 RD |
1107 | } |
1108 | } | |
1109 | ||
f281233d | 1110 | static int srp_queuecommand_lck(struct scsi_cmnd *scmnd, |
aef9ec39 RD |
1111 | void (*done)(struct scsi_cmnd *)) |
1112 | { | |
1113 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1114 | struct srp_request *req; | |
1115 | struct srp_iu *iu; | |
1116 | struct srp_cmd *cmd; | |
85507bcc | 1117 | struct ib_device *dev; |
aef9ec39 RD |
1118 | int len; |
1119 | ||
1120 | if (target->state == SRP_TARGET_CONNECTING) | |
1121 | goto err; | |
1122 | ||
1123 | if (target->state == SRP_TARGET_DEAD || | |
1124 | target->state == SRP_TARGET_REMOVED) { | |
1125 | scmnd->result = DID_BAD_TARGET << 16; | |
1126 | done(scmnd); | |
1127 | return 0; | |
1128 | } | |
1129 | ||
bb12588a | 1130 | iu = __srp_get_tx_iu(target, SRP_IU_CMD); |
aef9ec39 RD |
1131 | if (!iu) |
1132 | goto err; | |
1133 | ||
05321937 | 1134 | dev = target->srp_host->srp_dev->dev; |
85507bcc RC |
1135 | ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len, |
1136 | DMA_TO_DEVICE); | |
aef9ec39 | 1137 | |
21c1a907 | 1138 | req = list_first_entry(&target->free_reqs, struct srp_request, list); |
aef9ec39 RD |
1139 | |
1140 | scmnd->scsi_done = done; | |
1141 | scmnd->result = 0; | |
f8b6e31e | 1142 | scmnd->host_scribble = (void *) req; |
aef9ec39 RD |
1143 | |
1144 | cmd = iu->buf; | |
1145 | memset(cmd, 0, sizeof *cmd); | |
1146 | ||
1147 | cmd->opcode = SRP_CMD; | |
1148 | cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); | |
d945e1df | 1149 | cmd->tag = req->index; |
aef9ec39 RD |
1150 | memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); |
1151 | ||
aef9ec39 RD |
1152 | req->scmnd = scmnd; |
1153 | req->cmd = iu; | |
aef9ec39 RD |
1154 | |
1155 | len = srp_map_data(scmnd, target, req); | |
1156 | if (len < 0) { | |
7aa54bd7 DD |
1157 | shost_printk(KERN_ERR, target->scsi_host, |
1158 | PFX "Failed to map data\n"); | |
aef9ec39 RD |
1159 | goto err; |
1160 | } | |
1161 | ||
85507bcc RC |
1162 | ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len, |
1163 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1164 | |
1165 | if (__srp_post_send(target, iu, len)) { | |
7aa54bd7 | 1166 | shost_printk(KERN_ERR, target->scsi_host, PFX "Send failed\n"); |
aef9ec39 RD |
1167 | goto err_unmap; |
1168 | } | |
1169 | ||
536ae14e | 1170 | list_del(&req->list); |
aef9ec39 RD |
1171 | |
1172 | return 0; | |
1173 | ||
1174 | err_unmap: | |
1175 | srp_unmap_data(scmnd, target, req); | |
1176 | ||
1177 | err: | |
1178 | return SCSI_MLQUEUE_HOST_BUSY; | |
1179 | } | |
1180 | ||
f281233d JG |
1181 | static DEF_SCSI_QCMD(srp_queuecommand) |
1182 | ||
aef9ec39 RD |
1183 | static int srp_alloc_iu_bufs(struct srp_target_port *target) |
1184 | { | |
1185 | int i; | |
1186 | ||
1187 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1188 | target->rx_ring[i] = srp_alloc_iu(target->srp_host, | |
1189 | target->max_ti_iu_len, | |
1190 | GFP_KERNEL, DMA_FROM_DEVICE); | |
1191 | if (!target->rx_ring[i]) | |
1192 | goto err; | |
1193 | } | |
1194 | ||
dd5e6e38 | 1195 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
aef9ec39 | 1196 | target->tx_ring[i] = srp_alloc_iu(target->srp_host, |
74b0a15b | 1197 | srp_max_iu_len, |
aef9ec39 RD |
1198 | GFP_KERNEL, DMA_TO_DEVICE); |
1199 | if (!target->tx_ring[i]) | |
1200 | goto err; | |
dcb4cb85 BVA |
1201 | |
1202 | list_add(&target->tx_ring[i]->list, &target->free_tx); | |
aef9ec39 RD |
1203 | } |
1204 | ||
1205 | return 0; | |
1206 | ||
1207 | err: | |
1208 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1209 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
1210 | target->rx_ring[i] = NULL; | |
1211 | } | |
1212 | ||
dd5e6e38 | 1213 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
aef9ec39 RD |
1214 | srp_free_iu(target->srp_host, target->tx_ring[i]); |
1215 | target->tx_ring[i] = NULL; | |
1216 | } | |
1217 | ||
1218 | return -ENOMEM; | |
1219 | } | |
1220 | ||
1221 | static void srp_cm_rej_handler(struct ib_cm_id *cm_id, | |
1222 | struct ib_cm_event *event, | |
1223 | struct srp_target_port *target) | |
1224 | { | |
7aa54bd7 | 1225 | struct Scsi_Host *shost = target->scsi_host; |
aef9ec39 RD |
1226 | struct ib_class_port_info *cpi; |
1227 | int opcode; | |
1228 | ||
1229 | switch (event->param.rej_rcvd.reason) { | |
1230 | case IB_CM_REJ_PORT_CM_REDIRECT: | |
1231 | cpi = event->param.rej_rcvd.ari; | |
1232 | target->path.dlid = cpi->redirect_lid; | |
1233 | target->path.pkey = cpi->redirect_pkey; | |
1234 | cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; | |
1235 | memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); | |
1236 | ||
1237 | target->status = target->path.dlid ? | |
1238 | SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; | |
1239 | break; | |
1240 | ||
1241 | case IB_CM_REJ_PORT_REDIRECT: | |
5d7cbfd6 | 1242 | if (srp_target_is_topspin(target)) { |
aef9ec39 RD |
1243 | /* |
1244 | * Topspin/Cisco SRP gateways incorrectly send | |
1245 | * reject reason code 25 when they mean 24 | |
1246 | * (port redirect). | |
1247 | */ | |
1248 | memcpy(target->path.dgid.raw, | |
1249 | event->param.rej_rcvd.ari, 16); | |
1250 | ||
7aa54bd7 DD |
1251 | shost_printk(KERN_DEBUG, shost, |
1252 | PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", | |
1253 | (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), | |
1254 | (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); | |
aef9ec39 RD |
1255 | |
1256 | target->status = SRP_PORT_REDIRECT; | |
1257 | } else { | |
7aa54bd7 DD |
1258 | shost_printk(KERN_WARNING, shost, |
1259 | " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); | |
aef9ec39 RD |
1260 | target->status = -ECONNRESET; |
1261 | } | |
1262 | break; | |
1263 | ||
1264 | case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: | |
7aa54bd7 DD |
1265 | shost_printk(KERN_WARNING, shost, |
1266 | " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); | |
aef9ec39 RD |
1267 | target->status = -ECONNRESET; |
1268 | break; | |
1269 | ||
1270 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1271 | opcode = *(u8 *) event->private_data; | |
1272 | if (opcode == SRP_LOGIN_REJ) { | |
1273 | struct srp_login_rej *rej = event->private_data; | |
1274 | u32 reason = be32_to_cpu(rej->reason); | |
1275 | ||
1276 | if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) | |
7aa54bd7 DD |
1277 | shost_printk(KERN_WARNING, shost, |
1278 | PFX "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); | |
aef9ec39 | 1279 | else |
7aa54bd7 DD |
1280 | shost_printk(KERN_WARNING, shost, |
1281 | PFX "SRP LOGIN REJECTED, reason 0x%08x\n", reason); | |
aef9ec39 | 1282 | } else |
7aa54bd7 DD |
1283 | shost_printk(KERN_WARNING, shost, |
1284 | " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," | |
1285 | " opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
1286 | target->status = -ECONNRESET; |
1287 | break; | |
1288 | ||
9fe4bcf4 DD |
1289 | case IB_CM_REJ_STALE_CONN: |
1290 | shost_printk(KERN_WARNING, shost, " REJ reason: stale connection\n"); | |
1291 | target->status = SRP_STALE_CONN; | |
1292 | break; | |
1293 | ||
aef9ec39 | 1294 | default: |
7aa54bd7 DD |
1295 | shost_printk(KERN_WARNING, shost, " REJ reason 0x%x\n", |
1296 | event->param.rej_rcvd.reason); | |
aef9ec39 RD |
1297 | target->status = -ECONNRESET; |
1298 | } | |
1299 | } | |
1300 | ||
1301 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
1302 | { | |
1303 | struct srp_target_port *target = cm_id->context; | |
1304 | struct ib_qp_attr *qp_attr = NULL; | |
1305 | int attr_mask = 0; | |
1306 | int comp = 0; | |
1307 | int opcode = 0; | |
c996bb47 | 1308 | int i; |
aef9ec39 RD |
1309 | |
1310 | switch (event->event) { | |
1311 | case IB_CM_REQ_ERROR: | |
7aa54bd7 DD |
1312 | shost_printk(KERN_DEBUG, target->scsi_host, |
1313 | PFX "Sending CM REQ failed\n"); | |
aef9ec39 RD |
1314 | comp = 1; |
1315 | target->status = -ECONNRESET; | |
1316 | break; | |
1317 | ||
1318 | case IB_CM_REP_RECEIVED: | |
1319 | comp = 1; | |
1320 | opcode = *(u8 *) event->private_data; | |
1321 | ||
1322 | if (opcode == SRP_LOGIN_RSP) { | |
1323 | struct srp_login_rsp *rsp = event->private_data; | |
1324 | ||
1325 | target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); | |
1326 | target->req_lim = be32_to_cpu(rsp->req_lim_delta); | |
1327 | ||
7ade400a BVA |
1328 | /* |
1329 | * Reserve credits for task management so we don't | |
1330 | * bounce requests back to the SCSI mid-layer. | |
1331 | */ | |
1332 | target->scsi_host->can_queue | |
1333 | = min(target->req_lim - SRP_TSK_MGMT_SQ_SIZE, | |
1334 | target->scsi_host->can_queue); | |
aef9ec39 | 1335 | } else { |
7aa54bd7 DD |
1336 | shost_printk(KERN_WARNING, target->scsi_host, |
1337 | PFX "Unhandled RSP opcode %#x\n", opcode); | |
aef9ec39 RD |
1338 | target->status = -ECONNRESET; |
1339 | break; | |
1340 | } | |
1341 | ||
d2fcea7d VP |
1342 | if (!target->rx_ring[0]) { |
1343 | target->status = srp_alloc_iu_bufs(target); | |
1344 | if (target->status) | |
1345 | break; | |
1346 | } | |
aef9ec39 RD |
1347 | |
1348 | qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); | |
1349 | if (!qp_attr) { | |
1350 | target->status = -ENOMEM; | |
1351 | break; | |
1352 | } | |
1353 | ||
1354 | qp_attr->qp_state = IB_QPS_RTR; | |
1355 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1356 | if (target->status) | |
1357 | break; | |
1358 | ||
1359 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1360 | if (target->status) | |
1361 | break; | |
1362 | ||
c996bb47 | 1363 | for (i = 0; i < SRP_RQ_SIZE; i++) { |
dcb4cb85 BVA |
1364 | struct srp_iu *iu = target->rx_ring[i]; |
1365 | target->status = srp_post_recv(target, iu); | |
c996bb47 BVA |
1366 | if (target->status) |
1367 | break; | |
1368 | } | |
aef9ec39 RD |
1369 | if (target->status) |
1370 | break; | |
1371 | ||
1372 | qp_attr->qp_state = IB_QPS_RTS; | |
1373 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1374 | if (target->status) | |
1375 | break; | |
1376 | ||
1377 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1378 | if (target->status) | |
1379 | break; | |
1380 | ||
1381 | target->status = ib_send_cm_rtu(cm_id, NULL, 0); | |
1382 | if (target->status) | |
1383 | break; | |
1384 | ||
1385 | break; | |
1386 | ||
1387 | case IB_CM_REJ_RECEIVED: | |
7aa54bd7 | 1388 | shost_printk(KERN_DEBUG, target->scsi_host, PFX "REJ received\n"); |
aef9ec39 RD |
1389 | comp = 1; |
1390 | ||
1391 | srp_cm_rej_handler(cm_id, event, target); | |
1392 | break; | |
1393 | ||
b7ac4ab4 | 1394 | case IB_CM_DREQ_RECEIVED: |
7aa54bd7 DD |
1395 | shost_printk(KERN_WARNING, target->scsi_host, |
1396 | PFX "DREQ received - connection closed\n"); | |
b7ac4ab4 | 1397 | if (ib_send_cm_drep(cm_id, NULL, 0)) |
7aa54bd7 DD |
1398 | shost_printk(KERN_ERR, target->scsi_host, |
1399 | PFX "Sending CM DREP failed\n"); | |
aef9ec39 RD |
1400 | break; |
1401 | ||
1402 | case IB_CM_TIMEWAIT_EXIT: | |
7aa54bd7 DD |
1403 | shost_printk(KERN_ERR, target->scsi_host, |
1404 | PFX "connection closed\n"); | |
aef9ec39 RD |
1405 | |
1406 | comp = 1; | |
1407 | target->status = 0; | |
1408 | break; | |
1409 | ||
b7ac4ab4 IR |
1410 | case IB_CM_MRA_RECEIVED: |
1411 | case IB_CM_DREQ_ERROR: | |
1412 | case IB_CM_DREP_RECEIVED: | |
1413 | break; | |
1414 | ||
aef9ec39 | 1415 | default: |
7aa54bd7 DD |
1416 | shost_printk(KERN_WARNING, target->scsi_host, |
1417 | PFX "Unhandled CM event %d\n", event->event); | |
aef9ec39 RD |
1418 | break; |
1419 | } | |
1420 | ||
1421 | if (comp) | |
1422 | complete(&target->done); | |
1423 | ||
1424 | kfree(qp_attr); | |
1425 | ||
1426 | return 0; | |
1427 | } | |
1428 | ||
d945e1df | 1429 | static int srp_send_tsk_mgmt(struct srp_target_port *target, |
f8b6e31e | 1430 | u64 req_tag, unsigned int lun, u8 func) |
aef9ec39 | 1431 | { |
19081f31 | 1432 | struct ib_device *dev = target->srp_host->srp_dev->dev; |
aef9ec39 RD |
1433 | struct srp_iu *iu; |
1434 | struct srp_tsk_mgmt *tsk_mgmt; | |
aef9ec39 RD |
1435 | |
1436 | spin_lock_irq(target->scsi_host->host_lock); | |
1437 | ||
1285b3a0 | 1438 | if (target->state == SRP_TARGET_DEAD || |
f8b6e31e | 1439 | target->state == SRP_TARGET_REMOVED) |
1285b3a0 | 1440 | goto out; |
1285b3a0 | 1441 | |
f8b6e31e | 1442 | init_completion(&target->tsk_mgmt_done); |
aef9ec39 | 1443 | |
bb12588a | 1444 | iu = __srp_get_tx_iu(target, SRP_IU_TSK_MGMT); |
aef9ec39 RD |
1445 | if (!iu) |
1446 | goto out; | |
1447 | ||
19081f31 DD |
1448 | ib_dma_sync_single_for_cpu(dev, iu->dma, sizeof *tsk_mgmt, |
1449 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1450 | tsk_mgmt = iu->buf; |
1451 | memset(tsk_mgmt, 0, sizeof *tsk_mgmt); | |
1452 | ||
1453 | tsk_mgmt->opcode = SRP_TSK_MGMT; | |
f8b6e31e DD |
1454 | tsk_mgmt->lun = cpu_to_be64((u64) lun << 48); |
1455 | tsk_mgmt->tag = req_tag | SRP_TAG_TSK_MGMT; | |
aef9ec39 | 1456 | tsk_mgmt->tsk_mgmt_func = func; |
f8b6e31e | 1457 | tsk_mgmt->task_tag = req_tag; |
aef9ec39 | 1458 | |
19081f31 DD |
1459 | ib_dma_sync_single_for_device(dev, iu->dma, sizeof *tsk_mgmt, |
1460 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1461 | if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) |
1462 | goto out; | |
1463 | ||
aef9ec39 | 1464 | spin_unlock_irq(target->scsi_host->host_lock); |
d945e1df | 1465 | |
f8b6e31e | 1466 | if (!wait_for_completion_timeout(&target->tsk_mgmt_done, |
aef9ec39 | 1467 | msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) |
d945e1df | 1468 | return -1; |
aef9ec39 | 1469 | |
d945e1df | 1470 | return 0; |
aef9ec39 RD |
1471 | |
1472 | out: | |
1473 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df RD |
1474 | return -1; |
1475 | } | |
1476 | ||
aef9ec39 RD |
1477 | static int srp_abort(struct scsi_cmnd *scmnd) |
1478 | { | |
d945e1df | 1479 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
f8b6e31e | 1480 | struct srp_request *req = (struct srp_request *) scmnd->host_scribble; |
d945e1df RD |
1481 | int ret = SUCCESS; |
1482 | ||
7aa54bd7 | 1483 | shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n"); |
aef9ec39 | 1484 | |
f8b6e31e | 1485 | if (!req || target->qp_in_error) |
d945e1df | 1486 | return FAILED; |
f8b6e31e DD |
1487 | if (srp_send_tsk_mgmt(target, req->index, scmnd->device->lun, |
1488 | SRP_TSK_ABORT_TASK)) | |
d945e1df RD |
1489 | return FAILED; |
1490 | ||
1491 | spin_lock_irq(target->scsi_host->host_lock); | |
1492 | ||
f8b6e31e DD |
1493 | if (req->scmnd) { |
1494 | if (!target->tsk_mgmt_status) { | |
1495 | srp_remove_req(target, req); | |
1496 | scmnd->result = DID_ABORT << 16; | |
1497 | } else | |
1498 | ret = FAILED; | |
1499 | } | |
d945e1df RD |
1500 | |
1501 | spin_unlock_irq(target->scsi_host->host_lock); | |
1502 | ||
1503 | return ret; | |
aef9ec39 RD |
1504 | } |
1505 | ||
1506 | static int srp_reset_device(struct scsi_cmnd *scmnd) | |
1507 | { | |
d945e1df | 1508 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
536ae14e | 1509 | int i; |
d945e1df | 1510 | |
7aa54bd7 | 1511 | shost_printk(KERN_ERR, target->scsi_host, "SRP reset_device called\n"); |
aef9ec39 | 1512 | |
1033ff67 IR |
1513 | if (target->qp_in_error) |
1514 | return FAILED; | |
f8b6e31e DD |
1515 | if (srp_send_tsk_mgmt(target, SRP_TAG_NO_REQ, scmnd->device->lun, |
1516 | SRP_TSK_LUN_RESET)) | |
d945e1df | 1517 | return FAILED; |
f8b6e31e | 1518 | if (target->tsk_mgmt_status) |
d945e1df RD |
1519 | return FAILED; |
1520 | ||
1521 | spin_lock_irq(target->scsi_host->host_lock); | |
1522 | ||
536ae14e BVA |
1523 | for (i = 0; i < SRP_CMD_SQ_SIZE; ++i) { |
1524 | struct srp_request *req = &target->req_ring[i]; | |
f8b6e31e | 1525 | if (req->scmnd && req->scmnd->device == scmnd->device) |
526b4caa | 1526 | srp_reset_req(target, req); |
536ae14e | 1527 | } |
d945e1df RD |
1528 | |
1529 | spin_unlock_irq(target->scsi_host->host_lock); | |
1530 | ||
1531 | return SUCCESS; | |
aef9ec39 RD |
1532 | } |
1533 | ||
1534 | static int srp_reset_host(struct scsi_cmnd *scmnd) | |
1535 | { | |
1536 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1537 | int ret = FAILED; | |
1538 | ||
7aa54bd7 | 1539 | shost_printk(KERN_ERR, target->scsi_host, PFX "SRP reset_host called\n"); |
aef9ec39 RD |
1540 | |
1541 | if (!srp_reconnect_target(target)) | |
1542 | ret = SUCCESS; | |
1543 | ||
1544 | return ret; | |
1545 | } | |
1546 | ||
ee959b00 TJ |
1547 | static ssize_t show_id_ext(struct device *dev, struct device_attribute *attr, |
1548 | char *buf) | |
6ecb0c84 | 1549 | { |
ee959b00 | 1550 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1551 | |
1552 | if (target->state == SRP_TARGET_DEAD || | |
1553 | target->state == SRP_TARGET_REMOVED) | |
1554 | return -ENODEV; | |
1555 | ||
1556 | return sprintf(buf, "0x%016llx\n", | |
1557 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1558 | } | |
1559 | ||
ee959b00 TJ |
1560 | static ssize_t show_ioc_guid(struct device *dev, struct device_attribute *attr, |
1561 | char *buf) | |
6ecb0c84 | 1562 | { |
ee959b00 | 1563 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1564 | |
1565 | if (target->state == SRP_TARGET_DEAD || | |
1566 | target->state == SRP_TARGET_REMOVED) | |
1567 | return -ENODEV; | |
1568 | ||
1569 | return sprintf(buf, "0x%016llx\n", | |
1570 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
1571 | } | |
1572 | ||
ee959b00 TJ |
1573 | static ssize_t show_service_id(struct device *dev, |
1574 | struct device_attribute *attr, char *buf) | |
6ecb0c84 | 1575 | { |
ee959b00 | 1576 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1577 | |
1578 | if (target->state == SRP_TARGET_DEAD || | |
1579 | target->state == SRP_TARGET_REMOVED) | |
1580 | return -ENODEV; | |
1581 | ||
1582 | return sprintf(buf, "0x%016llx\n", | |
1583 | (unsigned long long) be64_to_cpu(target->service_id)); | |
1584 | } | |
1585 | ||
ee959b00 TJ |
1586 | static ssize_t show_pkey(struct device *dev, struct device_attribute *attr, |
1587 | char *buf) | |
6ecb0c84 | 1588 | { |
ee959b00 | 1589 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1590 | |
1591 | if (target->state == SRP_TARGET_DEAD || | |
1592 | target->state == SRP_TARGET_REMOVED) | |
1593 | return -ENODEV; | |
1594 | ||
1595 | return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); | |
1596 | } | |
1597 | ||
ee959b00 TJ |
1598 | static ssize_t show_dgid(struct device *dev, struct device_attribute *attr, |
1599 | char *buf) | |
6ecb0c84 | 1600 | { |
ee959b00 | 1601 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1602 | |
1603 | if (target->state == SRP_TARGET_DEAD || | |
1604 | target->state == SRP_TARGET_REMOVED) | |
1605 | return -ENODEV; | |
1606 | ||
5b095d98 | 1607 | return sprintf(buf, "%pI6\n", target->path.dgid.raw); |
6ecb0c84 RD |
1608 | } |
1609 | ||
ee959b00 TJ |
1610 | static ssize_t show_orig_dgid(struct device *dev, |
1611 | struct device_attribute *attr, char *buf) | |
3633b3d0 | 1612 | { |
ee959b00 | 1613 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
3633b3d0 IR |
1614 | |
1615 | if (target->state == SRP_TARGET_DEAD || | |
1616 | target->state == SRP_TARGET_REMOVED) | |
1617 | return -ENODEV; | |
1618 | ||
5b095d98 | 1619 | return sprintf(buf, "%pI6\n", target->orig_dgid); |
3633b3d0 IR |
1620 | } |
1621 | ||
89de7486 BVA |
1622 | static ssize_t show_req_lim(struct device *dev, |
1623 | struct device_attribute *attr, char *buf) | |
1624 | { | |
1625 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); | |
1626 | ||
1627 | if (target->state == SRP_TARGET_DEAD || | |
1628 | target->state == SRP_TARGET_REMOVED) | |
1629 | return -ENODEV; | |
1630 | ||
1631 | return sprintf(buf, "%d\n", target->req_lim); | |
1632 | } | |
1633 | ||
ee959b00 TJ |
1634 | static ssize_t show_zero_req_lim(struct device *dev, |
1635 | struct device_attribute *attr, char *buf) | |
6bfa24fa | 1636 | { |
ee959b00 | 1637 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6bfa24fa RD |
1638 | |
1639 | if (target->state == SRP_TARGET_DEAD || | |
1640 | target->state == SRP_TARGET_REMOVED) | |
1641 | return -ENODEV; | |
1642 | ||
1643 | return sprintf(buf, "%d\n", target->zero_req_lim); | |
1644 | } | |
1645 | ||
ee959b00 TJ |
1646 | static ssize_t show_local_ib_port(struct device *dev, |
1647 | struct device_attribute *attr, char *buf) | |
ded7f1a1 | 1648 | { |
ee959b00 | 1649 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
ded7f1a1 IR |
1650 | |
1651 | return sprintf(buf, "%d\n", target->srp_host->port); | |
1652 | } | |
1653 | ||
ee959b00 TJ |
1654 | static ssize_t show_local_ib_device(struct device *dev, |
1655 | struct device_attribute *attr, char *buf) | |
ded7f1a1 | 1656 | { |
ee959b00 | 1657 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
ded7f1a1 | 1658 | |
05321937 | 1659 | return sprintf(buf, "%s\n", target->srp_host->srp_dev->dev->name); |
ded7f1a1 IR |
1660 | } |
1661 | ||
ee959b00 TJ |
1662 | static DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); |
1663 | static DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); | |
1664 | static DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); | |
1665 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
1666 | static DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); | |
1667 | static DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL); | |
89de7486 | 1668 | static DEVICE_ATTR(req_lim, S_IRUGO, show_req_lim, NULL); |
ee959b00 TJ |
1669 | static DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); |
1670 | static DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL); | |
1671 | static DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL); | |
1672 | ||
1673 | static struct device_attribute *srp_host_attrs[] = { | |
1674 | &dev_attr_id_ext, | |
1675 | &dev_attr_ioc_guid, | |
1676 | &dev_attr_service_id, | |
1677 | &dev_attr_pkey, | |
1678 | &dev_attr_dgid, | |
1679 | &dev_attr_orig_dgid, | |
89de7486 | 1680 | &dev_attr_req_lim, |
ee959b00 TJ |
1681 | &dev_attr_zero_req_lim, |
1682 | &dev_attr_local_ib_port, | |
1683 | &dev_attr_local_ib_device, | |
6ecb0c84 RD |
1684 | NULL |
1685 | }; | |
1686 | ||
aef9ec39 RD |
1687 | static struct scsi_host_template srp_template = { |
1688 | .module = THIS_MODULE, | |
b7f008fd RD |
1689 | .name = "InfiniBand SRP initiator", |
1690 | .proc_name = DRV_NAME, | |
aef9ec39 RD |
1691 | .info = srp_target_info, |
1692 | .queuecommand = srp_queuecommand, | |
1693 | .eh_abort_handler = srp_abort, | |
1694 | .eh_device_reset_handler = srp_reset_device, | |
1695 | .eh_host_reset_handler = srp_reset_host, | |
dd5e6e38 | 1696 | .can_queue = SRP_CMD_SQ_SIZE, |
aef9ec39 | 1697 | .this_id = -1, |
dd5e6e38 | 1698 | .cmd_per_lun = SRP_CMD_SQ_SIZE, |
6ecb0c84 RD |
1699 | .use_clustering = ENABLE_CLUSTERING, |
1700 | .shost_attrs = srp_host_attrs | |
aef9ec39 RD |
1701 | }; |
1702 | ||
1703 | static int srp_add_target(struct srp_host *host, struct srp_target_port *target) | |
1704 | { | |
3236822b FT |
1705 | struct srp_rport_identifiers ids; |
1706 | struct srp_rport *rport; | |
1707 | ||
aef9ec39 RD |
1708 | sprintf(target->target_name, "SRP.T10:%016llX", |
1709 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1710 | ||
05321937 | 1711 | if (scsi_add_host(target->scsi_host, host->srp_dev->dev->dma_device)) |
aef9ec39 RD |
1712 | return -ENODEV; |
1713 | ||
3236822b FT |
1714 | memcpy(ids.port_id, &target->id_ext, 8); |
1715 | memcpy(ids.port_id + 8, &target->ioc_guid, 8); | |
aebd5e47 | 1716 | ids.roles = SRP_RPORT_ROLE_TARGET; |
3236822b FT |
1717 | rport = srp_rport_add(target->scsi_host, &ids); |
1718 | if (IS_ERR(rport)) { | |
1719 | scsi_remove_host(target->scsi_host); | |
1720 | return PTR_ERR(rport); | |
1721 | } | |
1722 | ||
b3589fd4 | 1723 | spin_lock(&host->target_lock); |
aef9ec39 | 1724 | list_add_tail(&target->list, &host->target_list); |
b3589fd4 | 1725 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1726 | |
1727 | target->state = SRP_TARGET_LIVE; | |
1728 | ||
aef9ec39 | 1729 | scsi_scan_target(&target->scsi_host->shost_gendev, |
1962a4a1 | 1730 | 0, target->scsi_id, SCAN_WILD_CARD, 0); |
aef9ec39 RD |
1731 | |
1732 | return 0; | |
1733 | } | |
1734 | ||
ee959b00 | 1735 | static void srp_release_dev(struct device *dev) |
aef9ec39 RD |
1736 | { |
1737 | struct srp_host *host = | |
ee959b00 | 1738 | container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
1739 | |
1740 | complete(&host->released); | |
1741 | } | |
1742 | ||
1743 | static struct class srp_class = { | |
1744 | .name = "infiniband_srp", | |
ee959b00 | 1745 | .dev_release = srp_release_dev |
aef9ec39 RD |
1746 | }; |
1747 | ||
1748 | /* | |
1749 | * Target ports are added by writing | |
1750 | * | |
1751 | * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, | |
1752 | * pkey=<P_Key>,service_id=<service ID> | |
1753 | * | |
1754 | * to the add_target sysfs attribute. | |
1755 | */ | |
1756 | enum { | |
1757 | SRP_OPT_ERR = 0, | |
1758 | SRP_OPT_ID_EXT = 1 << 0, | |
1759 | SRP_OPT_IOC_GUID = 1 << 1, | |
1760 | SRP_OPT_DGID = 1 << 2, | |
1761 | SRP_OPT_PKEY = 1 << 3, | |
1762 | SRP_OPT_SERVICE_ID = 1 << 4, | |
1763 | SRP_OPT_MAX_SECT = 1 << 5, | |
52fb2b50 | 1764 | SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, |
0c0450db | 1765 | SRP_OPT_IO_CLASS = 1 << 7, |
01cb9bcb | 1766 | SRP_OPT_INITIATOR_EXT = 1 << 8, |
aef9ec39 RD |
1767 | SRP_OPT_ALL = (SRP_OPT_ID_EXT | |
1768 | SRP_OPT_IOC_GUID | | |
1769 | SRP_OPT_DGID | | |
1770 | SRP_OPT_PKEY | | |
1771 | SRP_OPT_SERVICE_ID), | |
1772 | }; | |
1773 | ||
a447c093 | 1774 | static const match_table_t srp_opt_tokens = { |
52fb2b50 VP |
1775 | { SRP_OPT_ID_EXT, "id_ext=%s" }, |
1776 | { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, | |
1777 | { SRP_OPT_DGID, "dgid=%s" }, | |
1778 | { SRP_OPT_PKEY, "pkey=%x" }, | |
1779 | { SRP_OPT_SERVICE_ID, "service_id=%s" }, | |
1780 | { SRP_OPT_MAX_SECT, "max_sect=%d" }, | |
1781 | { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, | |
0c0450db | 1782 | { SRP_OPT_IO_CLASS, "io_class=%x" }, |
01cb9bcb | 1783 | { SRP_OPT_INITIATOR_EXT, "initiator_ext=%s" }, |
52fb2b50 | 1784 | { SRP_OPT_ERR, NULL } |
aef9ec39 RD |
1785 | }; |
1786 | ||
1787 | static int srp_parse_options(const char *buf, struct srp_target_port *target) | |
1788 | { | |
1789 | char *options, *sep_opt; | |
1790 | char *p; | |
1791 | char dgid[3]; | |
1792 | substring_t args[MAX_OPT_ARGS]; | |
1793 | int opt_mask = 0; | |
1794 | int token; | |
1795 | int ret = -EINVAL; | |
1796 | int i; | |
1797 | ||
1798 | options = kstrdup(buf, GFP_KERNEL); | |
1799 | if (!options) | |
1800 | return -ENOMEM; | |
1801 | ||
1802 | sep_opt = options; | |
1803 | while ((p = strsep(&sep_opt, ",")) != NULL) { | |
1804 | if (!*p) | |
1805 | continue; | |
1806 | ||
1807 | token = match_token(p, srp_opt_tokens, args); | |
1808 | opt_mask |= token; | |
1809 | ||
1810 | switch (token) { | |
1811 | case SRP_OPT_ID_EXT: | |
1812 | p = match_strdup(args); | |
a20f3a6d IR |
1813 | if (!p) { |
1814 | ret = -ENOMEM; | |
1815 | goto out; | |
1816 | } | |
aef9ec39 RD |
1817 | target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1818 | kfree(p); | |
1819 | break; | |
1820 | ||
1821 | case SRP_OPT_IOC_GUID: | |
1822 | p = match_strdup(args); | |
a20f3a6d IR |
1823 | if (!p) { |
1824 | ret = -ENOMEM; | |
1825 | goto out; | |
1826 | } | |
aef9ec39 RD |
1827 | target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1828 | kfree(p); | |
1829 | break; | |
1830 | ||
1831 | case SRP_OPT_DGID: | |
1832 | p = match_strdup(args); | |
a20f3a6d IR |
1833 | if (!p) { |
1834 | ret = -ENOMEM; | |
1835 | goto out; | |
1836 | } | |
aef9ec39 RD |
1837 | if (strlen(p) != 32) { |
1838 | printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); | |
ce1823f0 | 1839 | kfree(p); |
aef9ec39 RD |
1840 | goto out; |
1841 | } | |
1842 | ||
1843 | for (i = 0; i < 16; ++i) { | |
1844 | strlcpy(dgid, p + i * 2, 3); | |
1845 | target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); | |
1846 | } | |
bf17c1c7 | 1847 | kfree(p); |
3633b3d0 | 1848 | memcpy(target->orig_dgid, target->path.dgid.raw, 16); |
aef9ec39 RD |
1849 | break; |
1850 | ||
1851 | case SRP_OPT_PKEY: | |
1852 | if (match_hex(args, &token)) { | |
1853 | printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); | |
1854 | goto out; | |
1855 | } | |
1856 | target->path.pkey = cpu_to_be16(token); | |
1857 | break; | |
1858 | ||
1859 | case SRP_OPT_SERVICE_ID: | |
1860 | p = match_strdup(args); | |
a20f3a6d IR |
1861 | if (!p) { |
1862 | ret = -ENOMEM; | |
1863 | goto out; | |
1864 | } | |
aef9ec39 | 1865 | target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
247e020e | 1866 | target->path.service_id = target->service_id; |
aef9ec39 RD |
1867 | kfree(p); |
1868 | break; | |
1869 | ||
1870 | case SRP_OPT_MAX_SECT: | |
1871 | if (match_int(args, &token)) { | |
1872 | printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); | |
1873 | goto out; | |
1874 | } | |
1875 | target->scsi_host->max_sectors = token; | |
1876 | break; | |
1877 | ||
52fb2b50 VP |
1878 | case SRP_OPT_MAX_CMD_PER_LUN: |
1879 | if (match_int(args, &token)) { | |
1880 | printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); | |
1881 | goto out; | |
1882 | } | |
dd5e6e38 | 1883 | target->scsi_host->cmd_per_lun = min(token, SRP_CMD_SQ_SIZE); |
52fb2b50 VP |
1884 | break; |
1885 | ||
0c0450db R |
1886 | case SRP_OPT_IO_CLASS: |
1887 | if (match_hex(args, &token)) { | |
1888 | printk(KERN_WARNING PFX "bad IO class parameter '%s' \n", p); | |
1889 | goto out; | |
1890 | } | |
1891 | if (token != SRP_REV10_IB_IO_CLASS && | |
1892 | token != SRP_REV16A_IB_IO_CLASS) { | |
1893 | printk(KERN_WARNING PFX "unknown IO class parameter value" | |
1894 | " %x specified (use %x or %x).\n", | |
1895 | token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); | |
1896 | goto out; | |
1897 | } | |
1898 | target->io_class = token; | |
1899 | break; | |
1900 | ||
01cb9bcb IR |
1901 | case SRP_OPT_INITIATOR_EXT: |
1902 | p = match_strdup(args); | |
a20f3a6d IR |
1903 | if (!p) { |
1904 | ret = -ENOMEM; | |
1905 | goto out; | |
1906 | } | |
01cb9bcb IR |
1907 | target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1908 | kfree(p); | |
1909 | break; | |
1910 | ||
aef9ec39 RD |
1911 | default: |
1912 | printk(KERN_WARNING PFX "unknown parameter or missing value " | |
1913 | "'%s' in target creation request\n", p); | |
1914 | goto out; | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) | |
1919 | ret = 0; | |
1920 | else | |
1921 | for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) | |
1922 | if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && | |
1923 | !(srp_opt_tokens[i].token & opt_mask)) | |
1924 | printk(KERN_WARNING PFX "target creation request is " | |
1925 | "missing parameter '%s'\n", | |
1926 | srp_opt_tokens[i].pattern); | |
1927 | ||
1928 | out: | |
1929 | kfree(options); | |
1930 | return ret; | |
1931 | } | |
1932 | ||
ee959b00 TJ |
1933 | static ssize_t srp_create_target(struct device *dev, |
1934 | struct device_attribute *attr, | |
aef9ec39 RD |
1935 | const char *buf, size_t count) |
1936 | { | |
1937 | struct srp_host *host = | |
ee959b00 | 1938 | container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
1939 | struct Scsi_Host *target_host; |
1940 | struct srp_target_port *target; | |
1941 | int ret; | |
1942 | int i; | |
1943 | ||
1944 | target_host = scsi_host_alloc(&srp_template, | |
1945 | sizeof (struct srp_target_port)); | |
1946 | if (!target_host) | |
1947 | return -ENOMEM; | |
1948 | ||
3236822b | 1949 | target_host->transportt = ib_srp_transport_template; |
3c8edf0e AR |
1950 | target_host->max_lun = SRP_MAX_LUN; |
1951 | target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; | |
5f068992 | 1952 | |
aef9ec39 | 1953 | target = host_to_target(target_host); |
aef9ec39 | 1954 | |
0c0450db | 1955 | target->io_class = SRP_REV16A_IB_IO_CLASS; |
aef9ec39 RD |
1956 | target->scsi_host = target_host; |
1957 | target->srp_host = host; | |
1958 | ||
dcb4cb85 | 1959 | INIT_LIST_HEAD(&target->free_tx); |
d945e1df | 1960 | INIT_LIST_HEAD(&target->free_reqs); |
dd5e6e38 | 1961 | for (i = 0; i < SRP_CMD_SQ_SIZE; ++i) { |
d945e1df RD |
1962 | target->req_ring[i].index = i; |
1963 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
1964 | } | |
aef9ec39 RD |
1965 | |
1966 | ret = srp_parse_options(buf, target); | |
1967 | if (ret) | |
1968 | goto err; | |
1969 | ||
969a60f9 | 1970 | ib_query_gid(host->srp_dev->dev, host->port, 0, &target->path.sgid); |
aef9ec39 | 1971 | |
7aa54bd7 DD |
1972 | shost_printk(KERN_DEBUG, target->scsi_host, PFX |
1973 | "new target: id_ext %016llx ioc_guid %016llx pkey %04x " | |
5b095d98 | 1974 | "service_id %016llx dgid %pI6\n", |
aef9ec39 RD |
1975 | (unsigned long long) be64_to_cpu(target->id_ext), |
1976 | (unsigned long long) be64_to_cpu(target->ioc_guid), | |
1977 | be16_to_cpu(target->path.pkey), | |
1978 | (unsigned long long) be64_to_cpu(target->service_id), | |
8867cd7c | 1979 | target->path.dgid.raw); |
aef9ec39 RD |
1980 | |
1981 | ret = srp_create_target_ib(target); | |
1982 | if (ret) | |
1983 | goto err; | |
1984 | ||
9fe4bcf4 DD |
1985 | ret = srp_new_cm_id(target); |
1986 | if (ret) | |
aef9ec39 | 1987 | goto err_free; |
aef9ec39 | 1988 | |
1033ff67 | 1989 | target->qp_in_error = 0; |
aef9ec39 RD |
1990 | ret = srp_connect_target(target); |
1991 | if (ret) { | |
7aa54bd7 DD |
1992 | shost_printk(KERN_ERR, target->scsi_host, |
1993 | PFX "Connection failed\n"); | |
aef9ec39 RD |
1994 | goto err_cm_id; |
1995 | } | |
1996 | ||
1997 | ret = srp_add_target(host, target); | |
1998 | if (ret) | |
1999 | goto err_disconnect; | |
2000 | ||
2001 | return count; | |
2002 | ||
2003 | err_disconnect: | |
2004 | srp_disconnect_target(target); | |
2005 | ||
2006 | err_cm_id: | |
2007 | ib_destroy_cm_id(target->cm_id); | |
2008 | ||
2009 | err_free: | |
2010 | srp_free_target_ib(target); | |
2011 | ||
2012 | err: | |
2013 | scsi_host_put(target_host); | |
2014 | ||
2015 | return ret; | |
2016 | } | |
2017 | ||
ee959b00 | 2018 | static DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); |
aef9ec39 | 2019 | |
ee959b00 TJ |
2020 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
2021 | char *buf) | |
aef9ec39 | 2022 | { |
ee959b00 | 2023 | struct srp_host *host = container_of(dev, struct srp_host, dev); |
aef9ec39 | 2024 | |
05321937 | 2025 | return sprintf(buf, "%s\n", host->srp_dev->dev->name); |
aef9ec39 RD |
2026 | } |
2027 | ||
ee959b00 | 2028 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
aef9ec39 | 2029 | |
ee959b00 TJ |
2030 | static ssize_t show_port(struct device *dev, struct device_attribute *attr, |
2031 | char *buf) | |
aef9ec39 | 2032 | { |
ee959b00 | 2033 | struct srp_host *host = container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
2034 | |
2035 | return sprintf(buf, "%d\n", host->port); | |
2036 | } | |
2037 | ||
ee959b00 | 2038 | static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); |
aef9ec39 | 2039 | |
f5358a17 | 2040 | static struct srp_host *srp_add_port(struct srp_device *device, u8 port) |
aef9ec39 RD |
2041 | { |
2042 | struct srp_host *host; | |
2043 | ||
2044 | host = kzalloc(sizeof *host, GFP_KERNEL); | |
2045 | if (!host) | |
2046 | return NULL; | |
2047 | ||
2048 | INIT_LIST_HEAD(&host->target_list); | |
b3589fd4 | 2049 | spin_lock_init(&host->target_lock); |
aef9ec39 | 2050 | init_completion(&host->released); |
05321937 | 2051 | host->srp_dev = device; |
aef9ec39 RD |
2052 | host->port = port; |
2053 | ||
ee959b00 TJ |
2054 | host->dev.class = &srp_class; |
2055 | host->dev.parent = device->dev->dma_device; | |
d927e38c | 2056 | dev_set_name(&host->dev, "srp-%s-%d", device->dev->name, port); |
aef9ec39 | 2057 | |
ee959b00 | 2058 | if (device_register(&host->dev)) |
f5358a17 | 2059 | goto free_host; |
ee959b00 | 2060 | if (device_create_file(&host->dev, &dev_attr_add_target)) |
aef9ec39 | 2061 | goto err_class; |
ee959b00 | 2062 | if (device_create_file(&host->dev, &dev_attr_ibdev)) |
aef9ec39 | 2063 | goto err_class; |
ee959b00 | 2064 | if (device_create_file(&host->dev, &dev_attr_port)) |
aef9ec39 RD |
2065 | goto err_class; |
2066 | ||
2067 | return host; | |
2068 | ||
2069 | err_class: | |
ee959b00 | 2070 | device_unregister(&host->dev); |
aef9ec39 | 2071 | |
f5358a17 | 2072 | free_host: |
aef9ec39 RD |
2073 | kfree(host); |
2074 | ||
2075 | return NULL; | |
2076 | } | |
2077 | ||
2078 | static void srp_add_one(struct ib_device *device) | |
2079 | { | |
f5358a17 RD |
2080 | struct srp_device *srp_dev; |
2081 | struct ib_device_attr *dev_attr; | |
2082 | struct ib_fmr_pool_param fmr_param; | |
aef9ec39 | 2083 | struct srp_host *host; |
aef9ec39 RD |
2084 | int s, e, p; |
2085 | ||
f5358a17 RD |
2086 | dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); |
2087 | if (!dev_attr) | |
cf311cd4 | 2088 | return; |
aef9ec39 | 2089 | |
f5358a17 RD |
2090 | if (ib_query_device(device, dev_attr)) { |
2091 | printk(KERN_WARNING PFX "Query device failed for %s\n", | |
2092 | device->name); | |
2093 | goto free_attr; | |
2094 | } | |
2095 | ||
2096 | srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); | |
2097 | if (!srp_dev) | |
2098 | goto free_attr; | |
2099 | ||
2100 | /* | |
2101 | * Use the smallest page size supported by the HCA, down to a | |
2102 | * minimum of 512 bytes (which is the smallest sector that a | |
2103 | * SCSI command will ever carry). | |
2104 | */ | |
2105 | srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); | |
2106 | srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; | |
bf628dc2 | 2107 | srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1); |
f5358a17 RD |
2108 | |
2109 | INIT_LIST_HEAD(&srp_dev->dev_list); | |
2110 | ||
2111 | srp_dev->dev = device; | |
2112 | srp_dev->pd = ib_alloc_pd(device); | |
2113 | if (IS_ERR(srp_dev->pd)) | |
2114 | goto free_dev; | |
2115 | ||
2116 | srp_dev->mr = ib_get_dma_mr(srp_dev->pd, | |
2117 | IB_ACCESS_LOCAL_WRITE | | |
2118 | IB_ACCESS_REMOTE_READ | | |
2119 | IB_ACCESS_REMOTE_WRITE); | |
2120 | if (IS_ERR(srp_dev->mr)) | |
2121 | goto err_pd; | |
2122 | ||
2123 | memset(&fmr_param, 0, sizeof fmr_param); | |
2124 | fmr_param.pool_size = SRP_FMR_POOL_SIZE; | |
2125 | fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; | |
2126 | fmr_param.cache = 1; | |
2127 | fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; | |
2128 | fmr_param.page_shift = srp_dev->fmr_page_shift; | |
2129 | fmr_param.access = (IB_ACCESS_LOCAL_WRITE | | |
2130 | IB_ACCESS_REMOTE_WRITE | | |
2131 | IB_ACCESS_REMOTE_READ); | |
2132 | ||
2133 | srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); | |
2134 | if (IS_ERR(srp_dev->fmr_pool)) | |
2135 | srp_dev->fmr_pool = NULL; | |
aef9ec39 | 2136 | |
07ebafba | 2137 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
aef9ec39 RD |
2138 | s = 0; |
2139 | e = 0; | |
2140 | } else { | |
2141 | s = 1; | |
2142 | e = device->phys_port_cnt; | |
2143 | } | |
2144 | ||
2145 | for (p = s; p <= e; ++p) { | |
f5358a17 | 2146 | host = srp_add_port(srp_dev, p); |
aef9ec39 | 2147 | if (host) |
f5358a17 | 2148 | list_add_tail(&host->list, &srp_dev->dev_list); |
aef9ec39 RD |
2149 | } |
2150 | ||
f5358a17 RD |
2151 | ib_set_client_data(device, &srp_client, srp_dev); |
2152 | ||
2153 | goto free_attr; | |
2154 | ||
2155 | err_pd: | |
2156 | ib_dealloc_pd(srp_dev->pd); | |
2157 | ||
2158 | free_dev: | |
2159 | kfree(srp_dev); | |
2160 | ||
2161 | free_attr: | |
2162 | kfree(dev_attr); | |
aef9ec39 RD |
2163 | } |
2164 | ||
2165 | static void srp_remove_one(struct ib_device *device) | |
2166 | { | |
f5358a17 | 2167 | struct srp_device *srp_dev; |
aef9ec39 RD |
2168 | struct srp_host *host, *tmp_host; |
2169 | LIST_HEAD(target_list); | |
2170 | struct srp_target_port *target, *tmp_target; | |
aef9ec39 | 2171 | |
f5358a17 | 2172 | srp_dev = ib_get_client_data(device, &srp_client); |
aef9ec39 | 2173 | |
f5358a17 | 2174 | list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { |
ee959b00 | 2175 | device_unregister(&host->dev); |
aef9ec39 RD |
2176 | /* |
2177 | * Wait for the sysfs entry to go away, so that no new | |
2178 | * target ports can be created. | |
2179 | */ | |
2180 | wait_for_completion(&host->released); | |
2181 | ||
2182 | /* | |
2183 | * Mark all target ports as removed, so we stop queueing | |
2184 | * commands and don't try to reconnect. | |
2185 | */ | |
b3589fd4 | 2186 | spin_lock(&host->target_lock); |
549c5fc2 | 2187 | list_for_each_entry(target, &host->target_list, list) { |
0c5b3952 IR |
2188 | spin_lock_irq(target->scsi_host->host_lock); |
2189 | target->state = SRP_TARGET_REMOVED; | |
2190 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 | 2191 | } |
b3589fd4 | 2192 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
2193 | |
2194 | /* | |
2195 | * Wait for any reconnection tasks that may have | |
2196 | * started before we marked our target ports as | |
2197 | * removed, and any target port removal tasks. | |
2198 | */ | |
2199 | flush_scheduled_work(); | |
2200 | ||
2201 | list_for_each_entry_safe(target, tmp_target, | |
2202 | &host->target_list, list) { | |
b0e47c8b | 2203 | srp_remove_host(target->scsi_host); |
ad696989 | 2204 | scsi_remove_host(target->scsi_host); |
aef9ec39 RD |
2205 | srp_disconnect_target(target); |
2206 | ib_destroy_cm_id(target->cm_id); | |
2207 | srp_free_target_ib(target); | |
2208 | scsi_host_put(target->scsi_host); | |
2209 | } | |
2210 | ||
aef9ec39 RD |
2211 | kfree(host); |
2212 | } | |
2213 | ||
f5358a17 RD |
2214 | if (srp_dev->fmr_pool) |
2215 | ib_destroy_fmr_pool(srp_dev->fmr_pool); | |
2216 | ib_dereg_mr(srp_dev->mr); | |
2217 | ib_dealloc_pd(srp_dev->pd); | |
2218 | ||
2219 | kfree(srp_dev); | |
aef9ec39 RD |
2220 | } |
2221 | ||
3236822b FT |
2222 | static struct srp_function_template ib_srp_transport_functions = { |
2223 | }; | |
2224 | ||
aef9ec39 RD |
2225 | static int __init srp_init_module(void) |
2226 | { | |
2227 | int ret; | |
2228 | ||
dcb4cb85 | 2229 | BUILD_BUG_ON(FIELD_SIZEOF(struct ib_wc, wr_id) < sizeof(void *)); |
dd5e6e38 | 2230 | |
1e89a194 DD |
2231 | if (srp_sg_tablesize > 255) { |
2232 | printk(KERN_WARNING PFX "Clamping srp_sg_tablesize to 255\n"); | |
2233 | srp_sg_tablesize = 255; | |
2234 | } | |
2235 | ||
3236822b FT |
2236 | ib_srp_transport_template = |
2237 | srp_attach_transport(&ib_srp_transport_functions); | |
2238 | if (!ib_srp_transport_template) | |
2239 | return -ENOMEM; | |
2240 | ||
74b0a15b VP |
2241 | srp_template.sg_tablesize = srp_sg_tablesize; |
2242 | srp_max_iu_len = (sizeof (struct srp_cmd) + | |
2243 | sizeof (struct srp_indirect_buf) + | |
2244 | srp_sg_tablesize * 16); | |
2245 | ||
aef9ec39 RD |
2246 | ret = class_register(&srp_class); |
2247 | if (ret) { | |
2248 | printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); | |
3236822b | 2249 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2250 | return ret; |
2251 | } | |
2252 | ||
c1a0b23b MT |
2253 | ib_sa_register_client(&srp_sa_client); |
2254 | ||
aef9ec39 RD |
2255 | ret = ib_register_client(&srp_client); |
2256 | if (ret) { | |
2257 | printk(KERN_ERR PFX "couldn't register IB client\n"); | |
3236822b | 2258 | srp_release_transport(ib_srp_transport_template); |
c1a0b23b | 2259 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 RD |
2260 | class_unregister(&srp_class); |
2261 | return ret; | |
2262 | } | |
2263 | ||
2264 | return 0; | |
2265 | } | |
2266 | ||
2267 | static void __exit srp_cleanup_module(void) | |
2268 | { | |
2269 | ib_unregister_client(&srp_client); | |
c1a0b23b | 2270 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 | 2271 | class_unregister(&srp_class); |
3236822b | 2272 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2273 | } |
2274 | ||
2275 | module_init(srp_init_module); | |
2276 | module_exit(srp_cleanup_module); |