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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); | |
83 | static void srp_completion(struct ib_cq *cq, void *target_ptr); | |
84 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event); | |
85 | ||
3236822b FT |
86 | static struct scsi_transport_template *ib_srp_transport_template; |
87 | ||
aef9ec39 RD |
88 | static struct ib_client srp_client = { |
89 | .name = "srp", | |
90 | .add = srp_add_one, | |
91 | .remove = srp_remove_one | |
92 | }; | |
93 | ||
c1a0b23b MT |
94 | static struct ib_sa_client srp_sa_client; |
95 | ||
aef9ec39 RD |
96 | static inline struct srp_target_port *host_to_target(struct Scsi_Host *host) |
97 | { | |
98 | return (struct srp_target_port *) host->hostdata; | |
99 | } | |
100 | ||
101 | static const char *srp_target_info(struct Scsi_Host *host) | |
102 | { | |
103 | return host_to_target(host)->target_name; | |
104 | } | |
105 | ||
5d7cbfd6 RD |
106 | static int srp_target_is_topspin(struct srp_target_port *target) |
107 | { | |
108 | static const u8 topspin_oui[3] = { 0x00, 0x05, 0xad }; | |
3d1ff48d | 109 | static const u8 cisco_oui[3] = { 0x00, 0x1b, 0x0d }; |
5d7cbfd6 RD |
110 | |
111 | return topspin_workarounds && | |
3d1ff48d RK |
112 | (!memcmp(&target->ioc_guid, topspin_oui, sizeof topspin_oui) || |
113 | !memcmp(&target->ioc_guid, cisco_oui, sizeof cisco_oui)); | |
5d7cbfd6 RD |
114 | } |
115 | ||
116 | static int srp_target_is_mellanox(struct srp_target_port *target) | |
117 | { | |
118 | static const u8 mellanox_oui[3] = { 0x00, 0x02, 0xc9 }; | |
119 | ||
120 | return mellanox_workarounds && | |
121 | !memcmp(&target->ioc_guid, mellanox_oui, sizeof mellanox_oui); | |
122 | } | |
123 | ||
aef9ec39 RD |
124 | static struct srp_iu *srp_alloc_iu(struct srp_host *host, size_t size, |
125 | gfp_t gfp_mask, | |
126 | enum dma_data_direction direction) | |
127 | { | |
128 | struct srp_iu *iu; | |
129 | ||
130 | iu = kmalloc(sizeof *iu, gfp_mask); | |
131 | if (!iu) | |
132 | goto out; | |
133 | ||
134 | iu->buf = kzalloc(size, gfp_mask); | |
135 | if (!iu->buf) | |
136 | goto out_free_iu; | |
137 | ||
05321937 GKH |
138 | iu->dma = ib_dma_map_single(host->srp_dev->dev, iu->buf, size, |
139 | direction); | |
140 | if (ib_dma_mapping_error(host->srp_dev->dev, iu->dma)) | |
aef9ec39 RD |
141 | goto out_free_buf; |
142 | ||
143 | iu->size = size; | |
144 | iu->direction = direction; | |
145 | ||
146 | return iu; | |
147 | ||
148 | out_free_buf: | |
149 | kfree(iu->buf); | |
150 | out_free_iu: | |
151 | kfree(iu); | |
152 | out: | |
153 | return NULL; | |
154 | } | |
155 | ||
156 | static void srp_free_iu(struct srp_host *host, struct srp_iu *iu) | |
157 | { | |
158 | if (!iu) | |
159 | return; | |
160 | ||
05321937 GKH |
161 | ib_dma_unmap_single(host->srp_dev->dev, iu->dma, iu->size, |
162 | iu->direction); | |
aef9ec39 RD |
163 | kfree(iu->buf); |
164 | kfree(iu); | |
165 | } | |
166 | ||
167 | static void srp_qp_event(struct ib_event *event, void *context) | |
168 | { | |
169 | printk(KERN_ERR PFX "QP event %d\n", event->event); | |
170 | } | |
171 | ||
172 | static int srp_init_qp(struct srp_target_port *target, | |
173 | struct ib_qp *qp) | |
174 | { | |
175 | struct ib_qp_attr *attr; | |
176 | int ret; | |
177 | ||
178 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
179 | if (!attr) | |
180 | return -ENOMEM; | |
181 | ||
969a60f9 RD |
182 | ret = ib_find_pkey(target->srp_host->srp_dev->dev, |
183 | target->srp_host->port, | |
184 | be16_to_cpu(target->path.pkey), | |
185 | &attr->pkey_index); | |
aef9ec39 RD |
186 | if (ret) |
187 | goto out; | |
188 | ||
189 | attr->qp_state = IB_QPS_INIT; | |
190 | attr->qp_access_flags = (IB_ACCESS_REMOTE_READ | | |
191 | IB_ACCESS_REMOTE_WRITE); | |
192 | attr->port_num = target->srp_host->port; | |
193 | ||
194 | ret = ib_modify_qp(qp, attr, | |
195 | IB_QP_STATE | | |
196 | IB_QP_PKEY_INDEX | | |
197 | IB_QP_ACCESS_FLAGS | | |
198 | IB_QP_PORT); | |
199 | ||
200 | out: | |
201 | kfree(attr); | |
202 | return ret; | |
203 | } | |
204 | ||
9fe4bcf4 DD |
205 | static int srp_new_cm_id(struct srp_target_port *target) |
206 | { | |
207 | struct ib_cm_id *new_cm_id; | |
208 | ||
05321937 | 209 | new_cm_id = ib_create_cm_id(target->srp_host->srp_dev->dev, |
9fe4bcf4 DD |
210 | srp_cm_handler, target); |
211 | if (IS_ERR(new_cm_id)) | |
212 | return PTR_ERR(new_cm_id); | |
213 | ||
214 | if (target->cm_id) | |
215 | ib_destroy_cm_id(target->cm_id); | |
216 | target->cm_id = new_cm_id; | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
aef9ec39 RD |
221 | static int srp_create_target_ib(struct srp_target_port *target) |
222 | { | |
223 | struct ib_qp_init_attr *init_attr; | |
224 | int ret; | |
225 | ||
226 | init_attr = kzalloc(sizeof *init_attr, GFP_KERNEL); | |
227 | if (!init_attr) | |
228 | return -ENOMEM; | |
229 | ||
05321937 GKH |
230 | target->cq = ib_create_cq(target->srp_host->srp_dev->dev, |
231 | srp_completion, NULL, target, SRP_CQ_SIZE, 0); | |
aef9ec39 RD |
232 | if (IS_ERR(target->cq)) { |
233 | ret = PTR_ERR(target->cq); | |
234 | goto out; | |
235 | } | |
236 | ||
237 | ib_req_notify_cq(target->cq, IB_CQ_NEXT_COMP); | |
238 | ||
239 | init_attr->event_handler = srp_qp_event; | |
240 | init_attr->cap.max_send_wr = SRP_SQ_SIZE; | |
241 | init_attr->cap.max_recv_wr = SRP_RQ_SIZE; | |
242 | init_attr->cap.max_recv_sge = 1; | |
243 | init_attr->cap.max_send_sge = 1; | |
244 | init_attr->sq_sig_type = IB_SIGNAL_ALL_WR; | |
245 | init_attr->qp_type = IB_QPT_RC; | |
246 | init_attr->send_cq = target->cq; | |
247 | init_attr->recv_cq = target->cq; | |
248 | ||
05321937 | 249 | target->qp = ib_create_qp(target->srp_host->srp_dev->pd, init_attr); |
aef9ec39 RD |
250 | if (IS_ERR(target->qp)) { |
251 | ret = PTR_ERR(target->qp); | |
252 | ib_destroy_cq(target->cq); | |
253 | goto out; | |
254 | } | |
255 | ||
256 | ret = srp_init_qp(target, target->qp); | |
257 | if (ret) { | |
258 | ib_destroy_qp(target->qp); | |
259 | ib_destroy_cq(target->cq); | |
260 | goto out; | |
261 | } | |
262 | ||
263 | out: | |
264 | kfree(init_attr); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | static void srp_free_target_ib(struct srp_target_port *target) | |
269 | { | |
270 | int i; | |
271 | ||
272 | ib_destroy_qp(target->qp); | |
273 | ib_destroy_cq(target->cq); | |
274 | ||
275 | for (i = 0; i < SRP_RQ_SIZE; ++i) | |
276 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
277 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) | |
278 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
279 | } | |
280 | ||
281 | static void srp_path_rec_completion(int status, | |
282 | struct ib_sa_path_rec *pathrec, | |
283 | void *target_ptr) | |
284 | { | |
285 | struct srp_target_port *target = target_ptr; | |
286 | ||
287 | target->status = status; | |
288 | if (status) | |
7aa54bd7 DD |
289 | shost_printk(KERN_ERR, target->scsi_host, |
290 | PFX "Got failed path rec status %d\n", status); | |
aef9ec39 RD |
291 | else |
292 | target->path = *pathrec; | |
293 | complete(&target->done); | |
294 | } | |
295 | ||
296 | static int srp_lookup_path(struct srp_target_port *target) | |
297 | { | |
298 | target->path.numb_path = 1; | |
299 | ||
300 | init_completion(&target->done); | |
301 | ||
c1a0b23b | 302 | target->path_query_id = ib_sa_path_rec_get(&srp_sa_client, |
05321937 | 303 | target->srp_host->srp_dev->dev, |
aef9ec39 RD |
304 | target->srp_host->port, |
305 | &target->path, | |
247e020e | 306 | IB_SA_PATH_REC_SERVICE_ID | |
aef9ec39 RD |
307 | IB_SA_PATH_REC_DGID | |
308 | IB_SA_PATH_REC_SGID | | |
309 | IB_SA_PATH_REC_NUMB_PATH | | |
310 | IB_SA_PATH_REC_PKEY, | |
311 | SRP_PATH_REC_TIMEOUT_MS, | |
312 | GFP_KERNEL, | |
313 | srp_path_rec_completion, | |
314 | target, &target->path_query); | |
315 | if (target->path_query_id < 0) | |
316 | return target->path_query_id; | |
317 | ||
318 | wait_for_completion(&target->done); | |
319 | ||
320 | if (target->status < 0) | |
7aa54bd7 DD |
321 | shost_printk(KERN_WARNING, target->scsi_host, |
322 | PFX "Path record query failed\n"); | |
aef9ec39 RD |
323 | |
324 | return target->status; | |
325 | } | |
326 | ||
327 | static int srp_send_req(struct srp_target_port *target) | |
328 | { | |
329 | struct { | |
330 | struct ib_cm_req_param param; | |
331 | struct srp_login_req priv; | |
332 | } *req = NULL; | |
333 | int status; | |
334 | ||
335 | req = kzalloc(sizeof *req, GFP_KERNEL); | |
336 | if (!req) | |
337 | return -ENOMEM; | |
338 | ||
339 | req->param.primary_path = &target->path; | |
340 | req->param.alternate_path = NULL; | |
341 | req->param.service_id = target->service_id; | |
342 | req->param.qp_num = target->qp->qp_num; | |
343 | req->param.qp_type = target->qp->qp_type; | |
344 | req->param.private_data = &req->priv; | |
345 | req->param.private_data_len = sizeof req->priv; | |
346 | req->param.flow_control = 1; | |
347 | ||
348 | get_random_bytes(&req->param.starting_psn, 4); | |
349 | req->param.starting_psn &= 0xffffff; | |
350 | ||
351 | /* | |
352 | * Pick some arbitrary defaults here; we could make these | |
353 | * module parameters if anyone cared about setting them. | |
354 | */ | |
355 | req->param.responder_resources = 4; | |
356 | req->param.remote_cm_response_timeout = 20; | |
357 | req->param.local_cm_response_timeout = 20; | |
358 | req->param.retry_count = 7; | |
359 | req->param.rnr_retry_count = 7; | |
360 | req->param.max_cm_retries = 15; | |
361 | ||
362 | req->priv.opcode = SRP_LOGIN_REQ; | |
363 | req->priv.tag = 0; | |
74b0a15b | 364 | req->priv.req_it_iu_len = cpu_to_be32(srp_max_iu_len); |
aef9ec39 RD |
365 | req->priv.req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | |
366 | SRP_BUF_FORMAT_INDIRECT); | |
0c0450db | 367 | /* |
3cd96564 | 368 | * In the published SRP specification (draft rev. 16a), the |
0c0450db R |
369 | * port identifier format is 8 bytes of ID extension followed |
370 | * by 8 bytes of GUID. Older drafts put the two halves in the | |
371 | * opposite order, so that the GUID comes first. | |
372 | * | |
373 | * Targets conforming to these obsolete drafts can be | |
374 | * recognized by the I/O Class they report. | |
375 | */ | |
376 | if (target->io_class == SRP_REV10_IB_IO_CLASS) { | |
377 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb | 378 | &target->path.sgid.global.interface_id, 8); |
0c0450db | 379 | memcpy(req->priv.initiator_port_id + 8, |
01cb9bcb | 380 | &target->initiator_ext, 8); |
0c0450db R |
381 | memcpy(req->priv.target_port_id, &target->ioc_guid, 8); |
382 | memcpy(req->priv.target_port_id + 8, &target->id_ext, 8); | |
383 | } else { | |
384 | memcpy(req->priv.initiator_port_id, | |
01cb9bcb IR |
385 | &target->initiator_ext, 8); |
386 | memcpy(req->priv.initiator_port_id + 8, | |
387 | &target->path.sgid.global.interface_id, 8); | |
0c0450db R |
388 | memcpy(req->priv.target_port_id, &target->id_ext, 8); |
389 | memcpy(req->priv.target_port_id + 8, &target->ioc_guid, 8); | |
390 | } | |
391 | ||
aef9ec39 RD |
392 | /* |
393 | * Topspin/Cisco SRP targets will reject our login unless we | |
01cb9bcb IR |
394 | * zero out the first 8 bytes of our initiator port ID and set |
395 | * the second 8 bytes to the local node GUID. | |
aef9ec39 | 396 | */ |
5d7cbfd6 | 397 | if (srp_target_is_topspin(target)) { |
7aa54bd7 DD |
398 | shost_printk(KERN_DEBUG, target->scsi_host, |
399 | PFX "Topspin/Cisco initiator port ID workaround " | |
400 | "activated for target GUID %016llx\n", | |
401 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
aef9ec39 | 402 | memset(req->priv.initiator_port_id, 0, 8); |
01cb9bcb | 403 | memcpy(req->priv.initiator_port_id + 8, |
05321937 | 404 | &target->srp_host->srp_dev->dev->node_guid, 8); |
aef9ec39 | 405 | } |
aef9ec39 RD |
406 | |
407 | status = ib_send_cm_req(target->cm_id, &req->param); | |
408 | ||
409 | kfree(req); | |
410 | ||
411 | return status; | |
412 | } | |
413 | ||
414 | static void srp_disconnect_target(struct srp_target_port *target) | |
415 | { | |
416 | /* XXX should send SRP_I_LOGOUT request */ | |
417 | ||
418 | init_completion(&target->done); | |
e6581056 | 419 | if (ib_send_cm_dreq(target->cm_id, NULL, 0)) { |
7aa54bd7 DD |
420 | shost_printk(KERN_DEBUG, target->scsi_host, |
421 | PFX "Sending CM DREQ failed\n"); | |
e6581056 RD |
422 | return; |
423 | } | |
aef9ec39 RD |
424 | wait_for_completion(&target->done); |
425 | } | |
426 | ||
c4028958 | 427 | static void srp_remove_work(struct work_struct *work) |
aef9ec39 | 428 | { |
c4028958 DH |
429 | struct srp_target_port *target = |
430 | container_of(work, struct srp_target_port, work); | |
aef9ec39 RD |
431 | |
432 | spin_lock_irq(target->scsi_host->host_lock); | |
433 | if (target->state != SRP_TARGET_DEAD) { | |
434 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 RD |
435 | return; |
436 | } | |
437 | target->state = SRP_TARGET_REMOVED; | |
438 | spin_unlock_irq(target->scsi_host->host_lock); | |
439 | ||
b3589fd4 | 440 | spin_lock(&target->srp_host->target_lock); |
aef9ec39 | 441 | list_del(&target->list); |
b3589fd4 | 442 | spin_unlock(&target->srp_host->target_lock); |
aef9ec39 | 443 | |
3236822b | 444 | srp_remove_host(target->scsi_host); |
aef9ec39 RD |
445 | scsi_remove_host(target->scsi_host); |
446 | ib_destroy_cm_id(target->cm_id); | |
447 | srp_free_target_ib(target); | |
448 | scsi_host_put(target->scsi_host); | |
aef9ec39 RD |
449 | } |
450 | ||
451 | static int srp_connect_target(struct srp_target_port *target) | |
452 | { | |
9fe4bcf4 | 453 | int retries = 3; |
aef9ec39 RD |
454 | int ret; |
455 | ||
456 | ret = srp_lookup_path(target); | |
457 | if (ret) | |
458 | return ret; | |
459 | ||
460 | while (1) { | |
461 | init_completion(&target->done); | |
462 | ret = srp_send_req(target); | |
463 | if (ret) | |
464 | return ret; | |
465 | wait_for_completion(&target->done); | |
466 | ||
467 | /* | |
468 | * The CM event handling code will set status to | |
469 | * SRP_PORT_REDIRECT if we get a port redirect REJ | |
470 | * back, or SRP_DLID_REDIRECT if we get a lid/qp | |
471 | * redirect REJ back. | |
472 | */ | |
473 | switch (target->status) { | |
474 | case 0: | |
475 | return 0; | |
476 | ||
477 | case SRP_PORT_REDIRECT: | |
478 | ret = srp_lookup_path(target); | |
479 | if (ret) | |
480 | return ret; | |
481 | break; | |
482 | ||
483 | case SRP_DLID_REDIRECT: | |
484 | break; | |
485 | ||
9fe4bcf4 DD |
486 | case SRP_STALE_CONN: |
487 | /* Our current CM id was stale, and is now in timewait. | |
488 | * Try to reconnect with a new one. | |
489 | */ | |
490 | if (!retries-- || srp_new_cm_id(target)) { | |
491 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
492 | "giving up on stale connection\n"); | |
493 | target->status = -ECONNRESET; | |
494 | return target->status; | |
495 | } | |
496 | ||
497 | shost_printk(KERN_ERR, target->scsi_host, PFX | |
498 | "retrying stale connection\n"); | |
499 | break; | |
500 | ||
aef9ec39 RD |
501 | default: |
502 | return target->status; | |
503 | } | |
504 | } | |
505 | } | |
506 | ||
d945e1df RD |
507 | static void srp_unmap_data(struct scsi_cmnd *scmnd, |
508 | struct srp_target_port *target, | |
509 | struct srp_request *req) | |
510 | { | |
bb350d1d | 511 | if (!scsi_sglist(scmnd) || |
d945e1df RD |
512 | (scmnd->sc_data_direction != DMA_TO_DEVICE && |
513 | scmnd->sc_data_direction != DMA_FROM_DEVICE)) | |
514 | return; | |
515 | ||
f5358a17 RD |
516 | if (req->fmr) { |
517 | ib_fmr_pool_unmap(req->fmr); | |
518 | req->fmr = NULL; | |
519 | } | |
520 | ||
05321937 | 521 | ib_dma_unmap_sg(target->srp_host->srp_dev->dev, scsi_sglist(scmnd), |
bb350d1d | 522 | scsi_sg_count(scmnd), scmnd->sc_data_direction); |
d945e1df RD |
523 | } |
524 | ||
526b4caa IR |
525 | static void srp_remove_req(struct srp_target_port *target, struct srp_request *req) |
526 | { | |
527 | srp_unmap_data(req->scmnd, target, req); | |
528 | list_move_tail(&req->list, &target->free_reqs); | |
529 | } | |
530 | ||
531 | static void srp_reset_req(struct srp_target_port *target, struct srp_request *req) | |
532 | { | |
533 | req->scmnd->result = DID_RESET << 16; | |
534 | req->scmnd->scsi_done(req->scmnd); | |
535 | srp_remove_req(target, req); | |
536 | } | |
537 | ||
aef9ec39 RD |
538 | static int srp_reconnect_target(struct srp_target_port *target) |
539 | { | |
aef9ec39 | 540 | struct ib_qp_attr qp_attr; |
526b4caa | 541 | struct srp_request *req, *tmp; |
aef9ec39 RD |
542 | struct ib_wc wc; |
543 | int ret; | |
aef9ec39 RD |
544 | |
545 | spin_lock_irq(target->scsi_host->host_lock); | |
546 | if (target->state != SRP_TARGET_LIVE) { | |
547 | spin_unlock_irq(target->scsi_host->host_lock); | |
548 | return -EAGAIN; | |
549 | } | |
550 | target->state = SRP_TARGET_CONNECTING; | |
551 | spin_unlock_irq(target->scsi_host->host_lock); | |
552 | ||
553 | srp_disconnect_target(target); | |
554 | /* | |
555 | * Now get a new local CM ID so that we avoid confusing the | |
556 | * target in case things are really fouled up. | |
557 | */ | |
9fe4bcf4 DD |
558 | ret = srp_new_cm_id(target); |
559 | if (ret) | |
aef9ec39 | 560 | goto err; |
aef9ec39 RD |
561 | |
562 | qp_attr.qp_state = IB_QPS_RESET; | |
563 | ret = ib_modify_qp(target->qp, &qp_attr, IB_QP_STATE); | |
564 | if (ret) | |
565 | goto err; | |
566 | ||
567 | ret = srp_init_qp(target, target->qp); | |
568 | if (ret) | |
569 | goto err; | |
570 | ||
571 | while (ib_poll_cq(target->cq, 1, &wc) > 0) | |
572 | ; /* nothing */ | |
573 | ||
d916a8f1 | 574 | spin_lock_irq(target->scsi_host->host_lock); |
526b4caa IR |
575 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) |
576 | srp_reset_req(target, req); | |
d916a8f1 | 577 | spin_unlock_irq(target->scsi_host->host_lock); |
aef9ec39 RD |
578 | |
579 | target->rx_head = 0; | |
580 | target->tx_head = 0; | |
581 | target->tx_tail = 0; | |
aef9ec39 | 582 | |
1033ff67 | 583 | target->qp_in_error = 0; |
aef9ec39 RD |
584 | ret = srp_connect_target(target); |
585 | if (ret) | |
586 | goto err; | |
587 | ||
588 | spin_lock_irq(target->scsi_host->host_lock); | |
589 | if (target->state == SRP_TARGET_CONNECTING) { | |
590 | ret = 0; | |
591 | target->state = SRP_TARGET_LIVE; | |
592 | } else | |
593 | ret = -EAGAIN; | |
594 | spin_unlock_irq(target->scsi_host->host_lock); | |
595 | ||
596 | return ret; | |
597 | ||
598 | err: | |
7aa54bd7 DD |
599 | shost_printk(KERN_ERR, target->scsi_host, |
600 | PFX "reconnect failed (%d), removing target port.\n", ret); | |
aef9ec39 RD |
601 | |
602 | /* | |
603 | * We couldn't reconnect, so kill our target port off. | |
604 | * However, we have to defer the real removal because we might | |
605 | * be in the context of the SCSI error handler now, which | |
606 | * would deadlock if we call scsi_remove_host(). | |
607 | */ | |
608 | spin_lock_irq(target->scsi_host->host_lock); | |
609 | if (target->state == SRP_TARGET_CONNECTING) { | |
610 | target->state = SRP_TARGET_DEAD; | |
c4028958 | 611 | INIT_WORK(&target->work, srp_remove_work); |
aef9ec39 RD |
612 | schedule_work(&target->work); |
613 | } | |
614 | spin_unlock_irq(target->scsi_host->host_lock); | |
615 | ||
616 | return ret; | |
617 | } | |
618 | ||
559ce8f1 | 619 | static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat, |
f5358a17 RD |
620 | int sg_cnt, struct srp_request *req, |
621 | struct srp_direct_buf *buf) | |
622 | { | |
623 | u64 io_addr = 0; | |
624 | u64 *dma_pages; | |
625 | u32 len; | |
626 | int page_cnt; | |
627 | int i, j; | |
628 | int ret; | |
05321937 | 629 | struct srp_device *dev = target->srp_host->srp_dev; |
85507bcc | 630 | struct ib_device *ibdev = dev->dev; |
bb350d1d | 631 | struct scatterlist *sg; |
f5358a17 RD |
632 | |
633 | if (!dev->fmr_pool) | |
634 | return -ENODEV; | |
635 | ||
5d7cbfd6 RD |
636 | if (srp_target_is_mellanox(target) && |
637 | (ib_sg_dma_address(ibdev, &scat[0]) & ~dev->fmr_page_mask)) | |
559ce8f1 IR |
638 | return -EINVAL; |
639 | ||
f5358a17 | 640 | len = page_cnt = 0; |
bb350d1d FT |
641 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
642 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 643 | |
bb350d1d | 644 | if (ib_sg_dma_address(ibdev, sg) & ~dev->fmr_page_mask) { |
f5358a17 RD |
645 | if (i > 0) |
646 | return -EINVAL; | |
647 | else | |
648 | ++page_cnt; | |
649 | } | |
bb350d1d | 650 | if ((ib_sg_dma_address(ibdev, sg) + dma_len) & |
f5358a17 RD |
651 | ~dev->fmr_page_mask) { |
652 | if (i < sg_cnt - 1) | |
653 | return -EINVAL; | |
654 | else | |
655 | ++page_cnt; | |
656 | } | |
657 | ||
85507bcc | 658 | len += dma_len; |
f5358a17 RD |
659 | } |
660 | ||
661 | page_cnt += len >> dev->fmr_page_shift; | |
662 | if (page_cnt > SRP_FMR_SIZE) | |
663 | return -ENOMEM; | |
664 | ||
665 | dma_pages = kmalloc(sizeof (u64) * page_cnt, GFP_ATOMIC); | |
666 | if (!dma_pages) | |
667 | return -ENOMEM; | |
668 | ||
669 | page_cnt = 0; | |
bb350d1d FT |
670 | scsi_for_each_sg(req->scmnd, sg, sg_cnt, i) { |
671 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc RC |
672 | |
673 | for (j = 0; j < dma_len; j += dev->fmr_page_size) | |
f5358a17 | 674 | dma_pages[page_cnt++] = |
bb350d1d | 675 | (ib_sg_dma_address(ibdev, sg) & |
85507bcc RC |
676 | dev->fmr_page_mask) + j; |
677 | } | |
f5358a17 RD |
678 | |
679 | req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool, | |
adfaa888 | 680 | dma_pages, page_cnt, io_addr); |
f5358a17 RD |
681 | if (IS_ERR(req->fmr)) { |
682 | ret = PTR_ERR(req->fmr); | |
6583eb3d | 683 | req->fmr = NULL; |
f5358a17 RD |
684 | goto out; |
685 | } | |
686 | ||
85507bcc RC |
687 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, &scat[0]) & |
688 | ~dev->fmr_page_mask); | |
f5358a17 RD |
689 | buf->key = cpu_to_be32(req->fmr->fmr->rkey); |
690 | buf->len = cpu_to_be32(len); | |
691 | ||
692 | ret = 0; | |
693 | ||
694 | out: | |
695 | kfree(dma_pages); | |
696 | ||
697 | return ret; | |
698 | } | |
699 | ||
aef9ec39 RD |
700 | static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target, |
701 | struct srp_request *req) | |
702 | { | |
cf368713 | 703 | struct scatterlist *scat; |
aef9ec39 | 704 | struct srp_cmd *cmd = req->cmd->buf; |
cf368713 | 705 | int len, nents, count; |
f5358a17 | 706 | u8 fmt = SRP_DATA_DESC_DIRECT; |
85507bcc RC |
707 | struct srp_device *dev; |
708 | struct ib_device *ibdev; | |
aef9ec39 | 709 | |
bb350d1d | 710 | if (!scsi_sglist(scmnd) || scmnd->sc_data_direction == DMA_NONE) |
aef9ec39 RD |
711 | return sizeof (struct srp_cmd); |
712 | ||
713 | if (scmnd->sc_data_direction != DMA_FROM_DEVICE && | |
714 | scmnd->sc_data_direction != DMA_TO_DEVICE) { | |
7aa54bd7 DD |
715 | shost_printk(KERN_WARNING, target->scsi_host, |
716 | PFX "Unhandled data direction %d\n", | |
717 | scmnd->sc_data_direction); | |
aef9ec39 RD |
718 | return -EINVAL; |
719 | } | |
720 | ||
bb350d1d FT |
721 | nents = scsi_sg_count(scmnd); |
722 | scat = scsi_sglist(scmnd); | |
aef9ec39 | 723 | |
05321937 | 724 | dev = target->srp_host->srp_dev; |
85507bcc RC |
725 | ibdev = dev->dev; |
726 | ||
727 | count = ib_dma_map_sg(ibdev, scat, nents, scmnd->sc_data_direction); | |
f5358a17 RD |
728 | |
729 | fmt = SRP_DATA_DESC_DIRECT; | |
730 | len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf); | |
aef9ec39 | 731 | |
cf368713 | 732 | if (count == 1) { |
f5358a17 RD |
733 | /* |
734 | * The midlayer only generated a single gather/scatter | |
735 | * entry, or DMA mapping coalesced everything to a | |
736 | * single entry. So a direct descriptor along with | |
737 | * the DMA MR suffices. | |
738 | */ | |
cf368713 | 739 | struct srp_direct_buf *buf = (void *) cmd->add_data; |
aef9ec39 | 740 | |
85507bcc RC |
741 | buf->va = cpu_to_be64(ib_sg_dma_address(ibdev, scat)); |
742 | buf->key = cpu_to_be32(dev->mr->rkey); | |
743 | buf->len = cpu_to_be32(ib_sg_dma_len(ibdev, scat)); | |
559ce8f1 | 744 | } else if (srp_map_fmr(target, scat, count, req, |
f5358a17 RD |
745 | (void *) cmd->add_data)) { |
746 | /* | |
747 | * FMR mapping failed, and the scatterlist has more | |
748 | * than one entry. Generate an indirect memory | |
749 | * descriptor. | |
750 | */ | |
cf368713 | 751 | struct srp_indirect_buf *buf = (void *) cmd->add_data; |
bb350d1d | 752 | struct scatterlist *sg; |
cf368713 | 753 | u32 datalen = 0; |
f5358a17 | 754 | int i; |
aef9ec39 | 755 | |
cf368713 | 756 | fmt = SRP_DATA_DESC_INDIRECT; |
f5358a17 RD |
757 | len = sizeof (struct srp_cmd) + |
758 | sizeof (struct srp_indirect_buf) + | |
759 | count * sizeof (struct srp_direct_buf); | |
760 | ||
bb350d1d FT |
761 | scsi_for_each_sg(scmnd, sg, count, i) { |
762 | unsigned int dma_len = ib_sg_dma_len(ibdev, sg); | |
85507bcc | 763 | |
f5358a17 | 764 | buf->desc_list[i].va = |
bb350d1d | 765 | cpu_to_be64(ib_sg_dma_address(ibdev, sg)); |
f5358a17 | 766 | buf->desc_list[i].key = |
85507bcc RC |
767 | cpu_to_be32(dev->mr->rkey); |
768 | buf->desc_list[i].len = cpu_to_be32(dma_len); | |
769 | datalen += dma_len; | |
f5358a17 | 770 | } |
aef9ec39 | 771 | |
cf368713 RD |
772 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) |
773 | cmd->data_out_desc_cnt = count; | |
774 | else | |
775 | cmd->data_in_desc_cnt = count; | |
776 | ||
f5358a17 RD |
777 | buf->table_desc.va = |
778 | cpu_to_be64(req->cmd->dma + sizeof *cmd + sizeof *buf); | |
cf368713 | 779 | buf->table_desc.key = |
05321937 | 780 | cpu_to_be32(target->srp_host->srp_dev->mr->rkey); |
cf368713 RD |
781 | buf->table_desc.len = |
782 | cpu_to_be32(count * sizeof (struct srp_direct_buf)); | |
783 | ||
cf368713 | 784 | buf->len = cpu_to_be32(datalen); |
aef9ec39 RD |
785 | } |
786 | ||
787 | if (scmnd->sc_data_direction == DMA_TO_DEVICE) | |
788 | cmd->buf_fmt = fmt << 4; | |
789 | else | |
790 | cmd->buf_fmt = fmt; | |
791 | ||
aef9ec39 RD |
792 | return len; |
793 | } | |
794 | ||
aef9ec39 RD |
795 | static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp) |
796 | { | |
797 | struct srp_request *req; | |
798 | struct scsi_cmnd *scmnd; | |
799 | unsigned long flags; | |
800 | s32 delta; | |
801 | ||
802 | delta = (s32) be32_to_cpu(rsp->req_lim_delta); | |
803 | ||
804 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
805 | ||
806 | target->req_lim += delta; | |
807 | ||
808 | req = &target->req_ring[rsp->tag & ~SRP_TAG_TSK_MGMT]; | |
809 | ||
810 | if (unlikely(rsp->tag & SRP_TAG_TSK_MGMT)) { | |
811 | if (be32_to_cpu(rsp->resp_data_len) < 4) | |
812 | req->tsk_status = -1; | |
813 | else | |
814 | req->tsk_status = rsp->data[3]; | |
815 | complete(&req->done); | |
816 | } else { | |
d945e1df | 817 | scmnd = req->scmnd; |
aef9ec39 | 818 | if (!scmnd) |
7aa54bd7 DD |
819 | shost_printk(KERN_ERR, target->scsi_host, |
820 | "Null scmnd for RSP w/tag %016llx\n", | |
821 | (unsigned long long) rsp->tag); | |
aef9ec39 RD |
822 | scmnd->result = rsp->status; |
823 | ||
824 | if (rsp->flags & SRP_RSP_FLAG_SNSVALID) { | |
825 | memcpy(scmnd->sense_buffer, rsp->data + | |
826 | be32_to_cpu(rsp->resp_data_len), | |
827 | min_t(int, be32_to_cpu(rsp->sense_data_len), | |
828 | SCSI_SENSE_BUFFERSIZE)); | |
829 | } | |
830 | ||
831 | if (rsp->flags & (SRP_RSP_FLAG_DOOVER | SRP_RSP_FLAG_DOUNDER)) | |
bb350d1d | 832 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_out_res_cnt)); |
aef9ec39 | 833 | else if (rsp->flags & (SRP_RSP_FLAG_DIOVER | SRP_RSP_FLAG_DIUNDER)) |
bb350d1d | 834 | scsi_set_resid(scmnd, be32_to_cpu(rsp->data_in_res_cnt)); |
aef9ec39 | 835 | |
aef9ec39 | 836 | if (!req->tsk_mgmt) { |
aef9ec39 RD |
837 | scmnd->host_scribble = (void *) -1L; |
838 | scmnd->scsi_done(scmnd); | |
839 | ||
d945e1df | 840 | srp_remove_req(target, req); |
aef9ec39 RD |
841 | } else |
842 | req->cmd_done = 1; | |
843 | } | |
844 | ||
845 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
846 | } | |
847 | ||
aef9ec39 RD |
848 | static void srp_handle_recv(struct srp_target_port *target, struct ib_wc *wc) |
849 | { | |
85507bcc | 850 | struct ib_device *dev; |
aef9ec39 RD |
851 | struct srp_iu *iu; |
852 | u8 opcode; | |
853 | ||
854 | iu = target->rx_ring[wc->wr_id & ~SRP_OP_RECV]; | |
855 | ||
05321937 | 856 | dev = target->srp_host->srp_dev->dev; |
85507bcc RC |
857 | ib_dma_sync_single_for_cpu(dev, iu->dma, target->max_ti_iu_len, |
858 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
859 | |
860 | opcode = *(u8 *) iu->buf; | |
861 | ||
862 | if (0) { | |
863 | int i; | |
864 | ||
7aa54bd7 DD |
865 | shost_printk(KERN_ERR, target->scsi_host, |
866 | PFX "recv completion, opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
867 | |
868 | for (i = 0; i < wc->byte_len; ++i) { | |
869 | if (i % 8 == 0) | |
870 | printk(KERN_ERR " [%02x] ", i); | |
871 | printk(" %02x", ((u8 *) iu->buf)[i]); | |
872 | if ((i + 1) % 8 == 0) | |
873 | printk("\n"); | |
874 | } | |
875 | ||
876 | if (wc->byte_len % 8) | |
877 | printk("\n"); | |
878 | } | |
879 | ||
880 | switch (opcode) { | |
881 | case SRP_RSP: | |
882 | srp_process_rsp(target, iu->buf); | |
883 | break; | |
884 | ||
885 | case SRP_T_LOGOUT: | |
886 | /* XXX Handle target logout */ | |
7aa54bd7 DD |
887 | shost_printk(KERN_WARNING, target->scsi_host, |
888 | PFX "Got target logout request\n"); | |
aef9ec39 RD |
889 | break; |
890 | ||
891 | default: | |
7aa54bd7 DD |
892 | shost_printk(KERN_WARNING, target->scsi_host, |
893 | PFX "Unhandled SRP opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
894 | break; |
895 | } | |
896 | ||
85507bcc RC |
897 | ib_dma_sync_single_for_device(dev, iu->dma, target->max_ti_iu_len, |
898 | DMA_FROM_DEVICE); | |
aef9ec39 RD |
899 | } |
900 | ||
901 | static void srp_completion(struct ib_cq *cq, void *target_ptr) | |
902 | { | |
903 | struct srp_target_port *target = target_ptr; | |
904 | struct ib_wc wc; | |
aef9ec39 RD |
905 | |
906 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
907 | while (ib_poll_cq(cq, 1, &wc) > 0) { | |
908 | if (wc.status) { | |
7aa54bd7 DD |
909 | shost_printk(KERN_ERR, target->scsi_host, |
910 | PFX "failed %s status %d\n", | |
911 | wc.wr_id & SRP_OP_RECV ? "receive" : "send", | |
912 | wc.status); | |
1033ff67 | 913 | target->qp_in_error = 1; |
aef9ec39 RD |
914 | break; |
915 | } | |
916 | ||
917 | if (wc.wr_id & SRP_OP_RECV) | |
918 | srp_handle_recv(target, &wc); | |
919 | else | |
920 | ++target->tx_tail; | |
921 | } | |
922 | } | |
923 | ||
924 | static int __srp_post_recv(struct srp_target_port *target) | |
925 | { | |
926 | struct srp_iu *iu; | |
927 | struct ib_sge list; | |
928 | struct ib_recv_wr wr, *bad_wr; | |
929 | unsigned int next; | |
930 | int ret; | |
931 | ||
932 | next = target->rx_head & (SRP_RQ_SIZE - 1); | |
933 | wr.wr_id = next | SRP_OP_RECV; | |
934 | iu = target->rx_ring[next]; | |
935 | ||
936 | list.addr = iu->dma; | |
937 | list.length = iu->size; | |
05321937 | 938 | list.lkey = target->srp_host->srp_dev->mr->lkey; |
aef9ec39 RD |
939 | |
940 | wr.next = NULL; | |
941 | wr.sg_list = &list; | |
942 | wr.num_sge = 1; | |
943 | ||
944 | ret = ib_post_recv(target->qp, &wr, &bad_wr); | |
945 | if (!ret) | |
946 | ++target->rx_head; | |
947 | ||
948 | return ret; | |
949 | } | |
950 | ||
951 | static int srp_post_recv(struct srp_target_port *target) | |
952 | { | |
953 | unsigned long flags; | |
954 | int ret; | |
955 | ||
956 | spin_lock_irqsave(target->scsi_host->host_lock, flags); | |
957 | ret = __srp_post_recv(target); | |
958 | spin_unlock_irqrestore(target->scsi_host->host_lock, flags); | |
959 | ||
960 | return ret; | |
961 | } | |
962 | ||
963 | /* | |
964 | * Must be called with target->scsi_host->host_lock held to protect | |
47f2bce9 RD |
965 | * req_lim and tx_head. Lock cannot be dropped between call here and |
966 | * call to __srp_post_send(). | |
aef9ec39 | 967 | */ |
8cba2077 DD |
968 | static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target, |
969 | enum srp_request_type req_type) | |
aef9ec39 | 970 | { |
8cba2077 DD |
971 | s32 min = (req_type == SRP_REQ_TASK_MGMT) ? 1 : 2; |
972 | ||
aef9ec39 RD |
973 | if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) |
974 | return NULL; | |
975 | ||
8cba2077 | 976 | if (target->req_lim < min) { |
6bfa24fa | 977 | ++target->zero_req_lim; |
8cba2077 DD |
978 | return NULL; |
979 | } | |
47f2bce9 | 980 | |
aef9ec39 RD |
981 | return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; |
982 | } | |
983 | ||
984 | /* | |
985 | * Must be called with target->scsi_host->host_lock held to protect | |
986 | * req_lim and tx_head. | |
987 | */ | |
988 | static int __srp_post_send(struct srp_target_port *target, | |
989 | struct srp_iu *iu, int len) | |
990 | { | |
991 | struct ib_sge list; | |
992 | struct ib_send_wr wr, *bad_wr; | |
993 | int ret = 0; | |
994 | ||
aef9ec39 RD |
995 | list.addr = iu->dma; |
996 | list.length = len; | |
05321937 | 997 | list.lkey = target->srp_host->srp_dev->mr->lkey; |
aef9ec39 RD |
998 | |
999 | wr.next = NULL; | |
1000 | wr.wr_id = target->tx_head & SRP_SQ_SIZE; | |
1001 | wr.sg_list = &list; | |
1002 | wr.num_sge = 1; | |
1003 | wr.opcode = IB_WR_SEND; | |
1004 | wr.send_flags = IB_SEND_SIGNALED; | |
1005 | ||
1006 | ret = ib_post_send(target->qp, &wr, &bad_wr); | |
1007 | ||
1008 | if (!ret) { | |
1009 | ++target->tx_head; | |
1010 | --target->req_lim; | |
1011 | } | |
1012 | ||
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | static int srp_queuecommand(struct scsi_cmnd *scmnd, | |
1017 | void (*done)(struct scsi_cmnd *)) | |
1018 | { | |
1019 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1020 | struct srp_request *req; | |
1021 | struct srp_iu *iu; | |
1022 | struct srp_cmd *cmd; | |
85507bcc | 1023 | struct ib_device *dev; |
aef9ec39 RD |
1024 | int len; |
1025 | ||
1026 | if (target->state == SRP_TARGET_CONNECTING) | |
1027 | goto err; | |
1028 | ||
1029 | if (target->state == SRP_TARGET_DEAD || | |
1030 | target->state == SRP_TARGET_REMOVED) { | |
1031 | scmnd->result = DID_BAD_TARGET << 16; | |
1032 | done(scmnd); | |
1033 | return 0; | |
1034 | } | |
1035 | ||
8cba2077 | 1036 | iu = __srp_get_tx_iu(target, SRP_REQ_NORMAL); |
aef9ec39 RD |
1037 | if (!iu) |
1038 | goto err; | |
1039 | ||
05321937 | 1040 | dev = target->srp_host->srp_dev->dev; |
85507bcc RC |
1041 | ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len, |
1042 | DMA_TO_DEVICE); | |
aef9ec39 | 1043 | |
d945e1df | 1044 | req = list_entry(target->free_reqs.next, struct srp_request, list); |
aef9ec39 RD |
1045 | |
1046 | scmnd->scsi_done = done; | |
1047 | scmnd->result = 0; | |
d945e1df | 1048 | scmnd->host_scribble = (void *) (long) req->index; |
aef9ec39 RD |
1049 | |
1050 | cmd = iu->buf; | |
1051 | memset(cmd, 0, sizeof *cmd); | |
1052 | ||
1053 | cmd->opcode = SRP_CMD; | |
1054 | cmd->lun = cpu_to_be64((u64) scmnd->device->lun << 48); | |
d945e1df | 1055 | cmd->tag = req->index; |
aef9ec39 RD |
1056 | memcpy(cmd->cdb, scmnd->cmnd, scmnd->cmd_len); |
1057 | ||
aef9ec39 RD |
1058 | req->scmnd = scmnd; |
1059 | req->cmd = iu; | |
1060 | req->cmd_done = 0; | |
1061 | req->tsk_mgmt = NULL; | |
1062 | ||
1063 | len = srp_map_data(scmnd, target, req); | |
1064 | if (len < 0) { | |
7aa54bd7 DD |
1065 | shost_printk(KERN_ERR, target->scsi_host, |
1066 | PFX "Failed to map data\n"); | |
aef9ec39 RD |
1067 | goto err; |
1068 | } | |
1069 | ||
1070 | if (__srp_post_recv(target)) { | |
7aa54bd7 | 1071 | shost_printk(KERN_ERR, target->scsi_host, PFX "Recv failed\n"); |
aef9ec39 RD |
1072 | goto err_unmap; |
1073 | } | |
1074 | ||
85507bcc RC |
1075 | ib_dma_sync_single_for_device(dev, iu->dma, srp_max_iu_len, |
1076 | DMA_TO_DEVICE); | |
aef9ec39 RD |
1077 | |
1078 | if (__srp_post_send(target, iu, len)) { | |
7aa54bd7 | 1079 | shost_printk(KERN_ERR, target->scsi_host, PFX "Send failed\n"); |
aef9ec39 RD |
1080 | goto err_unmap; |
1081 | } | |
1082 | ||
d945e1df | 1083 | list_move_tail(&req->list, &target->req_queue); |
aef9ec39 RD |
1084 | |
1085 | return 0; | |
1086 | ||
1087 | err_unmap: | |
1088 | srp_unmap_data(scmnd, target, req); | |
1089 | ||
1090 | err: | |
1091 | return SCSI_MLQUEUE_HOST_BUSY; | |
1092 | } | |
1093 | ||
1094 | static int srp_alloc_iu_bufs(struct srp_target_port *target) | |
1095 | { | |
1096 | int i; | |
1097 | ||
1098 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1099 | target->rx_ring[i] = srp_alloc_iu(target->srp_host, | |
1100 | target->max_ti_iu_len, | |
1101 | GFP_KERNEL, DMA_FROM_DEVICE); | |
1102 | if (!target->rx_ring[i]) | |
1103 | goto err; | |
1104 | } | |
1105 | ||
1106 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1107 | target->tx_ring[i] = srp_alloc_iu(target->srp_host, | |
74b0a15b | 1108 | srp_max_iu_len, |
aef9ec39 RD |
1109 | GFP_KERNEL, DMA_TO_DEVICE); |
1110 | if (!target->tx_ring[i]) | |
1111 | goto err; | |
1112 | } | |
1113 | ||
1114 | return 0; | |
1115 | ||
1116 | err: | |
1117 | for (i = 0; i < SRP_RQ_SIZE; ++i) { | |
1118 | srp_free_iu(target->srp_host, target->rx_ring[i]); | |
1119 | target->rx_ring[i] = NULL; | |
1120 | } | |
1121 | ||
1122 | for (i = 0; i < SRP_SQ_SIZE + 1; ++i) { | |
1123 | srp_free_iu(target->srp_host, target->tx_ring[i]); | |
1124 | target->tx_ring[i] = NULL; | |
1125 | } | |
1126 | ||
1127 | return -ENOMEM; | |
1128 | } | |
1129 | ||
1130 | static void srp_cm_rej_handler(struct ib_cm_id *cm_id, | |
1131 | struct ib_cm_event *event, | |
1132 | struct srp_target_port *target) | |
1133 | { | |
7aa54bd7 | 1134 | struct Scsi_Host *shost = target->scsi_host; |
aef9ec39 RD |
1135 | struct ib_class_port_info *cpi; |
1136 | int opcode; | |
1137 | ||
1138 | switch (event->param.rej_rcvd.reason) { | |
1139 | case IB_CM_REJ_PORT_CM_REDIRECT: | |
1140 | cpi = event->param.rej_rcvd.ari; | |
1141 | target->path.dlid = cpi->redirect_lid; | |
1142 | target->path.pkey = cpi->redirect_pkey; | |
1143 | cm_id->remote_cm_qpn = be32_to_cpu(cpi->redirect_qp) & 0x00ffffff; | |
1144 | memcpy(target->path.dgid.raw, cpi->redirect_gid, 16); | |
1145 | ||
1146 | target->status = target->path.dlid ? | |
1147 | SRP_DLID_REDIRECT : SRP_PORT_REDIRECT; | |
1148 | break; | |
1149 | ||
1150 | case IB_CM_REJ_PORT_REDIRECT: | |
5d7cbfd6 | 1151 | if (srp_target_is_topspin(target)) { |
aef9ec39 RD |
1152 | /* |
1153 | * Topspin/Cisco SRP gateways incorrectly send | |
1154 | * reject reason code 25 when they mean 24 | |
1155 | * (port redirect). | |
1156 | */ | |
1157 | memcpy(target->path.dgid.raw, | |
1158 | event->param.rej_rcvd.ari, 16); | |
1159 | ||
7aa54bd7 DD |
1160 | shost_printk(KERN_DEBUG, shost, |
1161 | PFX "Topspin/Cisco redirect to target port GID %016llx%016llx\n", | |
1162 | (unsigned long long) be64_to_cpu(target->path.dgid.global.subnet_prefix), | |
1163 | (unsigned long long) be64_to_cpu(target->path.dgid.global.interface_id)); | |
aef9ec39 RD |
1164 | |
1165 | target->status = SRP_PORT_REDIRECT; | |
1166 | } else { | |
7aa54bd7 DD |
1167 | shost_printk(KERN_WARNING, shost, |
1168 | " REJ reason: IB_CM_REJ_PORT_REDIRECT\n"); | |
aef9ec39 RD |
1169 | target->status = -ECONNRESET; |
1170 | } | |
1171 | break; | |
1172 | ||
1173 | case IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID: | |
7aa54bd7 DD |
1174 | shost_printk(KERN_WARNING, shost, |
1175 | " REJ reason: IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID\n"); | |
aef9ec39 RD |
1176 | target->status = -ECONNRESET; |
1177 | break; | |
1178 | ||
1179 | case IB_CM_REJ_CONSUMER_DEFINED: | |
1180 | opcode = *(u8 *) event->private_data; | |
1181 | if (opcode == SRP_LOGIN_REJ) { | |
1182 | struct srp_login_rej *rej = event->private_data; | |
1183 | u32 reason = be32_to_cpu(rej->reason); | |
1184 | ||
1185 | if (reason == SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE) | |
7aa54bd7 DD |
1186 | shost_printk(KERN_WARNING, shost, |
1187 | PFX "SRP_LOGIN_REJ: requested max_it_iu_len too large\n"); | |
aef9ec39 | 1188 | else |
7aa54bd7 DD |
1189 | shost_printk(KERN_WARNING, shost, |
1190 | PFX "SRP LOGIN REJECTED, reason 0x%08x\n", reason); | |
aef9ec39 | 1191 | } else |
7aa54bd7 DD |
1192 | shost_printk(KERN_WARNING, shost, |
1193 | " REJ reason: IB_CM_REJ_CONSUMER_DEFINED," | |
1194 | " opcode 0x%02x\n", opcode); | |
aef9ec39 RD |
1195 | target->status = -ECONNRESET; |
1196 | break; | |
1197 | ||
9fe4bcf4 DD |
1198 | case IB_CM_REJ_STALE_CONN: |
1199 | shost_printk(KERN_WARNING, shost, " REJ reason: stale connection\n"); | |
1200 | target->status = SRP_STALE_CONN; | |
1201 | break; | |
1202 | ||
aef9ec39 | 1203 | default: |
7aa54bd7 DD |
1204 | shost_printk(KERN_WARNING, shost, " REJ reason 0x%x\n", |
1205 | event->param.rej_rcvd.reason); | |
aef9ec39 RD |
1206 | target->status = -ECONNRESET; |
1207 | } | |
1208 | } | |
1209 | ||
1210 | static int srp_cm_handler(struct ib_cm_id *cm_id, struct ib_cm_event *event) | |
1211 | { | |
1212 | struct srp_target_port *target = cm_id->context; | |
1213 | struct ib_qp_attr *qp_attr = NULL; | |
1214 | int attr_mask = 0; | |
1215 | int comp = 0; | |
1216 | int opcode = 0; | |
1217 | ||
1218 | switch (event->event) { | |
1219 | case IB_CM_REQ_ERROR: | |
7aa54bd7 DD |
1220 | shost_printk(KERN_DEBUG, target->scsi_host, |
1221 | PFX "Sending CM REQ failed\n"); | |
aef9ec39 RD |
1222 | comp = 1; |
1223 | target->status = -ECONNRESET; | |
1224 | break; | |
1225 | ||
1226 | case IB_CM_REP_RECEIVED: | |
1227 | comp = 1; | |
1228 | opcode = *(u8 *) event->private_data; | |
1229 | ||
1230 | if (opcode == SRP_LOGIN_RSP) { | |
1231 | struct srp_login_rsp *rsp = event->private_data; | |
1232 | ||
1233 | target->max_ti_iu_len = be32_to_cpu(rsp->max_ti_iu_len); | |
1234 | target->req_lim = be32_to_cpu(rsp->req_lim_delta); | |
1235 | ||
1236 | target->scsi_host->can_queue = min(target->req_lim, | |
1237 | target->scsi_host->can_queue); | |
1238 | } else { | |
7aa54bd7 DD |
1239 | shost_printk(KERN_WARNING, target->scsi_host, |
1240 | PFX "Unhandled RSP opcode %#x\n", opcode); | |
aef9ec39 RD |
1241 | target->status = -ECONNRESET; |
1242 | break; | |
1243 | } | |
1244 | ||
d2fcea7d VP |
1245 | if (!target->rx_ring[0]) { |
1246 | target->status = srp_alloc_iu_bufs(target); | |
1247 | if (target->status) | |
1248 | break; | |
1249 | } | |
aef9ec39 RD |
1250 | |
1251 | qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL); | |
1252 | if (!qp_attr) { | |
1253 | target->status = -ENOMEM; | |
1254 | break; | |
1255 | } | |
1256 | ||
1257 | qp_attr->qp_state = IB_QPS_RTR; | |
1258 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1259 | if (target->status) | |
1260 | break; | |
1261 | ||
1262 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1263 | if (target->status) | |
1264 | break; | |
1265 | ||
1266 | target->status = srp_post_recv(target); | |
1267 | if (target->status) | |
1268 | break; | |
1269 | ||
1270 | qp_attr->qp_state = IB_QPS_RTS; | |
1271 | target->status = ib_cm_init_qp_attr(cm_id, qp_attr, &attr_mask); | |
1272 | if (target->status) | |
1273 | break; | |
1274 | ||
1275 | target->status = ib_modify_qp(target->qp, qp_attr, attr_mask); | |
1276 | if (target->status) | |
1277 | break; | |
1278 | ||
1279 | target->status = ib_send_cm_rtu(cm_id, NULL, 0); | |
1280 | if (target->status) | |
1281 | break; | |
1282 | ||
1283 | break; | |
1284 | ||
1285 | case IB_CM_REJ_RECEIVED: | |
7aa54bd7 | 1286 | shost_printk(KERN_DEBUG, target->scsi_host, PFX "REJ received\n"); |
aef9ec39 RD |
1287 | comp = 1; |
1288 | ||
1289 | srp_cm_rej_handler(cm_id, event, target); | |
1290 | break; | |
1291 | ||
b7ac4ab4 | 1292 | case IB_CM_DREQ_RECEIVED: |
7aa54bd7 DD |
1293 | shost_printk(KERN_WARNING, target->scsi_host, |
1294 | PFX "DREQ received - connection closed\n"); | |
b7ac4ab4 | 1295 | if (ib_send_cm_drep(cm_id, NULL, 0)) |
7aa54bd7 DD |
1296 | shost_printk(KERN_ERR, target->scsi_host, |
1297 | PFX "Sending CM DREP failed\n"); | |
aef9ec39 RD |
1298 | break; |
1299 | ||
1300 | case IB_CM_TIMEWAIT_EXIT: | |
7aa54bd7 DD |
1301 | shost_printk(KERN_ERR, target->scsi_host, |
1302 | PFX "connection closed\n"); | |
aef9ec39 RD |
1303 | |
1304 | comp = 1; | |
1305 | target->status = 0; | |
1306 | break; | |
1307 | ||
b7ac4ab4 IR |
1308 | case IB_CM_MRA_RECEIVED: |
1309 | case IB_CM_DREQ_ERROR: | |
1310 | case IB_CM_DREP_RECEIVED: | |
1311 | break; | |
1312 | ||
aef9ec39 | 1313 | default: |
7aa54bd7 DD |
1314 | shost_printk(KERN_WARNING, target->scsi_host, |
1315 | PFX "Unhandled CM event %d\n", event->event); | |
aef9ec39 RD |
1316 | break; |
1317 | } | |
1318 | ||
1319 | if (comp) | |
1320 | complete(&target->done); | |
1321 | ||
1322 | kfree(qp_attr); | |
1323 | ||
1324 | return 0; | |
1325 | } | |
1326 | ||
d945e1df RD |
1327 | static int srp_send_tsk_mgmt(struct srp_target_port *target, |
1328 | struct srp_request *req, u8 func) | |
aef9ec39 | 1329 | { |
aef9ec39 RD |
1330 | struct srp_iu *iu; |
1331 | struct srp_tsk_mgmt *tsk_mgmt; | |
aef9ec39 RD |
1332 | |
1333 | spin_lock_irq(target->scsi_host->host_lock); | |
1334 | ||
1285b3a0 RD |
1335 | if (target->state == SRP_TARGET_DEAD || |
1336 | target->state == SRP_TARGET_REMOVED) { | |
d945e1df | 1337 | req->scmnd->result = DID_BAD_TARGET << 16; |
1285b3a0 RD |
1338 | goto out; |
1339 | } | |
1340 | ||
aef9ec39 RD |
1341 | init_completion(&req->done); |
1342 | ||
8cba2077 | 1343 | iu = __srp_get_tx_iu(target, SRP_REQ_TASK_MGMT); |
aef9ec39 RD |
1344 | if (!iu) |
1345 | goto out; | |
1346 | ||
1347 | tsk_mgmt = iu->buf; | |
1348 | memset(tsk_mgmt, 0, sizeof *tsk_mgmt); | |
1349 | ||
1350 | tsk_mgmt->opcode = SRP_TSK_MGMT; | |
d945e1df RD |
1351 | tsk_mgmt->lun = cpu_to_be64((u64) req->scmnd->device->lun << 48); |
1352 | tsk_mgmt->tag = req->index | SRP_TAG_TSK_MGMT; | |
aef9ec39 | 1353 | tsk_mgmt->tsk_mgmt_func = func; |
d945e1df | 1354 | tsk_mgmt->task_tag = req->index; |
aef9ec39 RD |
1355 | |
1356 | if (__srp_post_send(target, iu, sizeof *tsk_mgmt)) | |
1357 | goto out; | |
1358 | ||
1359 | req->tsk_mgmt = iu; | |
1360 | ||
1361 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df | 1362 | |
aef9ec39 RD |
1363 | if (!wait_for_completion_timeout(&req->done, |
1364 | msecs_to_jiffies(SRP_ABORT_TIMEOUT_MS))) | |
d945e1df | 1365 | return -1; |
aef9ec39 | 1366 | |
d945e1df | 1367 | return 0; |
aef9ec39 RD |
1368 | |
1369 | out: | |
1370 | spin_unlock_irq(target->scsi_host->host_lock); | |
d945e1df RD |
1371 | return -1; |
1372 | } | |
1373 | ||
1374 | static int srp_find_req(struct srp_target_port *target, | |
1375 | struct scsi_cmnd *scmnd, | |
1376 | struct srp_request **req) | |
1377 | { | |
1378 | if (scmnd->host_scribble == (void *) -1L) | |
1379 | return -1; | |
1380 | ||
1381 | *req = &target->req_ring[(long) scmnd->host_scribble]; | |
1382 | ||
1383 | return 0; | |
aef9ec39 RD |
1384 | } |
1385 | ||
1386 | static int srp_abort(struct scsi_cmnd *scmnd) | |
1387 | { | |
d945e1df RD |
1388 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1389 | struct srp_request *req; | |
1390 | int ret = SUCCESS; | |
1391 | ||
7aa54bd7 | 1392 | shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n"); |
aef9ec39 | 1393 | |
1033ff67 IR |
1394 | if (target->qp_in_error) |
1395 | return FAILED; | |
d945e1df RD |
1396 | if (srp_find_req(target, scmnd, &req)) |
1397 | return FAILED; | |
1398 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_ABORT_TASK)) | |
1399 | return FAILED; | |
1400 | ||
1401 | spin_lock_irq(target->scsi_host->host_lock); | |
1402 | ||
1403 | if (req->cmd_done) { | |
1404 | srp_remove_req(target, req); | |
1405 | scmnd->scsi_done(scmnd); | |
1406 | } else if (!req->tsk_status) { | |
1407 | srp_remove_req(target, req); | |
1408 | scmnd->result = DID_ABORT << 16; | |
1409 | } else | |
1410 | ret = FAILED; | |
1411 | ||
1412 | spin_unlock_irq(target->scsi_host->host_lock); | |
1413 | ||
1414 | return ret; | |
aef9ec39 RD |
1415 | } |
1416 | ||
1417 | static int srp_reset_device(struct scsi_cmnd *scmnd) | |
1418 | { | |
d945e1df RD |
1419 | struct srp_target_port *target = host_to_target(scmnd->device->host); |
1420 | struct srp_request *req, *tmp; | |
1421 | ||
7aa54bd7 | 1422 | shost_printk(KERN_ERR, target->scsi_host, "SRP reset_device called\n"); |
aef9ec39 | 1423 | |
1033ff67 IR |
1424 | if (target->qp_in_error) |
1425 | return FAILED; | |
d945e1df RD |
1426 | if (srp_find_req(target, scmnd, &req)) |
1427 | return FAILED; | |
1428 | if (srp_send_tsk_mgmt(target, req, SRP_TSK_LUN_RESET)) | |
1429 | return FAILED; | |
1430 | if (req->tsk_status) | |
1431 | return FAILED; | |
1432 | ||
1433 | spin_lock_irq(target->scsi_host->host_lock); | |
1434 | ||
1435 | list_for_each_entry_safe(req, tmp, &target->req_queue, list) | |
526b4caa IR |
1436 | if (req->scmnd->device == scmnd->device) |
1437 | srp_reset_req(target, req); | |
d945e1df RD |
1438 | |
1439 | spin_unlock_irq(target->scsi_host->host_lock); | |
1440 | ||
1441 | return SUCCESS; | |
aef9ec39 RD |
1442 | } |
1443 | ||
1444 | static int srp_reset_host(struct scsi_cmnd *scmnd) | |
1445 | { | |
1446 | struct srp_target_port *target = host_to_target(scmnd->device->host); | |
1447 | int ret = FAILED; | |
1448 | ||
7aa54bd7 | 1449 | shost_printk(KERN_ERR, target->scsi_host, PFX "SRP reset_host called\n"); |
aef9ec39 RD |
1450 | |
1451 | if (!srp_reconnect_target(target)) | |
1452 | ret = SUCCESS; | |
1453 | ||
1454 | return ret; | |
1455 | } | |
1456 | ||
ee959b00 TJ |
1457 | static ssize_t show_id_ext(struct device *dev, struct device_attribute *attr, |
1458 | char *buf) | |
6ecb0c84 | 1459 | { |
ee959b00 | 1460 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1461 | |
1462 | if (target->state == SRP_TARGET_DEAD || | |
1463 | target->state == SRP_TARGET_REMOVED) | |
1464 | return -ENODEV; | |
1465 | ||
1466 | return sprintf(buf, "0x%016llx\n", | |
1467 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1468 | } | |
1469 | ||
ee959b00 TJ |
1470 | static ssize_t show_ioc_guid(struct device *dev, struct device_attribute *attr, |
1471 | char *buf) | |
6ecb0c84 | 1472 | { |
ee959b00 | 1473 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1474 | |
1475 | if (target->state == SRP_TARGET_DEAD || | |
1476 | target->state == SRP_TARGET_REMOVED) | |
1477 | return -ENODEV; | |
1478 | ||
1479 | return sprintf(buf, "0x%016llx\n", | |
1480 | (unsigned long long) be64_to_cpu(target->ioc_guid)); | |
1481 | } | |
1482 | ||
ee959b00 TJ |
1483 | static ssize_t show_service_id(struct device *dev, |
1484 | struct device_attribute *attr, char *buf) | |
6ecb0c84 | 1485 | { |
ee959b00 | 1486 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1487 | |
1488 | if (target->state == SRP_TARGET_DEAD || | |
1489 | target->state == SRP_TARGET_REMOVED) | |
1490 | return -ENODEV; | |
1491 | ||
1492 | return sprintf(buf, "0x%016llx\n", | |
1493 | (unsigned long long) be64_to_cpu(target->service_id)); | |
1494 | } | |
1495 | ||
ee959b00 TJ |
1496 | static ssize_t show_pkey(struct device *dev, struct device_attribute *attr, |
1497 | char *buf) | |
6ecb0c84 | 1498 | { |
ee959b00 | 1499 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1500 | |
1501 | if (target->state == SRP_TARGET_DEAD || | |
1502 | target->state == SRP_TARGET_REMOVED) | |
1503 | return -ENODEV; | |
1504 | ||
1505 | return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey)); | |
1506 | } | |
1507 | ||
ee959b00 TJ |
1508 | static ssize_t show_dgid(struct device *dev, struct device_attribute *attr, |
1509 | char *buf) | |
6ecb0c84 | 1510 | { |
ee959b00 | 1511 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6ecb0c84 RD |
1512 | |
1513 | if (target->state == SRP_TARGET_DEAD || | |
1514 | target->state == SRP_TARGET_REMOVED) | |
1515 | return -ENODEV; | |
1516 | ||
1517 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1518 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]), | |
1519 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]), | |
1520 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]), | |
1521 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]), | |
1522 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]), | |
1523 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]), | |
1524 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]), | |
1525 | be16_to_cpu(((__be16 *) target->path.dgid.raw)[7])); | |
1526 | } | |
1527 | ||
ee959b00 TJ |
1528 | static ssize_t show_orig_dgid(struct device *dev, |
1529 | struct device_attribute *attr, char *buf) | |
3633b3d0 | 1530 | { |
ee959b00 | 1531 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
3633b3d0 IR |
1532 | |
1533 | if (target->state == SRP_TARGET_DEAD || | |
1534 | target->state == SRP_TARGET_REMOVED) | |
1535 | return -ENODEV; | |
1536 | ||
1537 | return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
1538 | be16_to_cpu(target->orig_dgid[0]), | |
1539 | be16_to_cpu(target->orig_dgid[1]), | |
1540 | be16_to_cpu(target->orig_dgid[2]), | |
1541 | be16_to_cpu(target->orig_dgid[3]), | |
1542 | be16_to_cpu(target->orig_dgid[4]), | |
1543 | be16_to_cpu(target->orig_dgid[5]), | |
1544 | be16_to_cpu(target->orig_dgid[6]), | |
1545 | be16_to_cpu(target->orig_dgid[7])); | |
1546 | } | |
1547 | ||
ee959b00 TJ |
1548 | static ssize_t show_zero_req_lim(struct device *dev, |
1549 | struct device_attribute *attr, char *buf) | |
6bfa24fa | 1550 | { |
ee959b00 | 1551 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
6bfa24fa RD |
1552 | |
1553 | if (target->state == SRP_TARGET_DEAD || | |
1554 | target->state == SRP_TARGET_REMOVED) | |
1555 | return -ENODEV; | |
1556 | ||
1557 | return sprintf(buf, "%d\n", target->zero_req_lim); | |
1558 | } | |
1559 | ||
ee959b00 TJ |
1560 | static ssize_t show_local_ib_port(struct device *dev, |
1561 | struct device_attribute *attr, char *buf) | |
ded7f1a1 | 1562 | { |
ee959b00 | 1563 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
ded7f1a1 IR |
1564 | |
1565 | return sprintf(buf, "%d\n", target->srp_host->port); | |
1566 | } | |
1567 | ||
ee959b00 TJ |
1568 | static ssize_t show_local_ib_device(struct device *dev, |
1569 | struct device_attribute *attr, char *buf) | |
ded7f1a1 | 1570 | { |
ee959b00 | 1571 | struct srp_target_port *target = host_to_target(class_to_shost(dev)); |
ded7f1a1 | 1572 | |
05321937 | 1573 | return sprintf(buf, "%s\n", target->srp_host->srp_dev->dev->name); |
ded7f1a1 IR |
1574 | } |
1575 | ||
ee959b00 TJ |
1576 | static DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); |
1577 | static DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); | |
1578 | static DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); | |
1579 | static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); | |
1580 | static DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); | |
1581 | static DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL); | |
1582 | static DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); | |
1583 | static DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL); | |
1584 | static DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL); | |
1585 | ||
1586 | static struct device_attribute *srp_host_attrs[] = { | |
1587 | &dev_attr_id_ext, | |
1588 | &dev_attr_ioc_guid, | |
1589 | &dev_attr_service_id, | |
1590 | &dev_attr_pkey, | |
1591 | &dev_attr_dgid, | |
1592 | &dev_attr_orig_dgid, | |
1593 | &dev_attr_zero_req_lim, | |
1594 | &dev_attr_local_ib_port, | |
1595 | &dev_attr_local_ib_device, | |
6ecb0c84 RD |
1596 | NULL |
1597 | }; | |
1598 | ||
aef9ec39 RD |
1599 | static struct scsi_host_template srp_template = { |
1600 | .module = THIS_MODULE, | |
b7f008fd RD |
1601 | .name = "InfiniBand SRP initiator", |
1602 | .proc_name = DRV_NAME, | |
aef9ec39 RD |
1603 | .info = srp_target_info, |
1604 | .queuecommand = srp_queuecommand, | |
1605 | .eh_abort_handler = srp_abort, | |
1606 | .eh_device_reset_handler = srp_reset_device, | |
1607 | .eh_host_reset_handler = srp_reset_host, | |
1608 | .can_queue = SRP_SQ_SIZE, | |
1609 | .this_id = -1, | |
aef9ec39 | 1610 | .cmd_per_lun = SRP_SQ_SIZE, |
6ecb0c84 RD |
1611 | .use_clustering = ENABLE_CLUSTERING, |
1612 | .shost_attrs = srp_host_attrs | |
aef9ec39 RD |
1613 | }; |
1614 | ||
1615 | static int srp_add_target(struct srp_host *host, struct srp_target_port *target) | |
1616 | { | |
3236822b FT |
1617 | struct srp_rport_identifiers ids; |
1618 | struct srp_rport *rport; | |
1619 | ||
aef9ec39 RD |
1620 | sprintf(target->target_name, "SRP.T10:%016llX", |
1621 | (unsigned long long) be64_to_cpu(target->id_ext)); | |
1622 | ||
05321937 | 1623 | if (scsi_add_host(target->scsi_host, host->srp_dev->dev->dma_device)) |
aef9ec39 RD |
1624 | return -ENODEV; |
1625 | ||
3236822b FT |
1626 | memcpy(ids.port_id, &target->id_ext, 8); |
1627 | memcpy(ids.port_id + 8, &target->ioc_guid, 8); | |
aebd5e47 | 1628 | ids.roles = SRP_RPORT_ROLE_TARGET; |
3236822b FT |
1629 | rport = srp_rport_add(target->scsi_host, &ids); |
1630 | if (IS_ERR(rport)) { | |
1631 | scsi_remove_host(target->scsi_host); | |
1632 | return PTR_ERR(rport); | |
1633 | } | |
1634 | ||
b3589fd4 | 1635 | spin_lock(&host->target_lock); |
aef9ec39 | 1636 | list_add_tail(&target->list, &host->target_list); |
b3589fd4 | 1637 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
1638 | |
1639 | target->state = SRP_TARGET_LIVE; | |
1640 | ||
aef9ec39 | 1641 | scsi_scan_target(&target->scsi_host->shost_gendev, |
1962a4a1 | 1642 | 0, target->scsi_id, SCAN_WILD_CARD, 0); |
aef9ec39 RD |
1643 | |
1644 | return 0; | |
1645 | } | |
1646 | ||
ee959b00 | 1647 | static void srp_release_dev(struct device *dev) |
aef9ec39 RD |
1648 | { |
1649 | struct srp_host *host = | |
ee959b00 | 1650 | container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
1651 | |
1652 | complete(&host->released); | |
1653 | } | |
1654 | ||
1655 | static struct class srp_class = { | |
1656 | .name = "infiniband_srp", | |
ee959b00 | 1657 | .dev_release = srp_release_dev |
aef9ec39 RD |
1658 | }; |
1659 | ||
1660 | /* | |
1661 | * Target ports are added by writing | |
1662 | * | |
1663 | * id_ext=<SRP ID ext>,ioc_guid=<SRP IOC GUID>,dgid=<dest GID>, | |
1664 | * pkey=<P_Key>,service_id=<service ID> | |
1665 | * | |
1666 | * to the add_target sysfs attribute. | |
1667 | */ | |
1668 | enum { | |
1669 | SRP_OPT_ERR = 0, | |
1670 | SRP_OPT_ID_EXT = 1 << 0, | |
1671 | SRP_OPT_IOC_GUID = 1 << 1, | |
1672 | SRP_OPT_DGID = 1 << 2, | |
1673 | SRP_OPT_PKEY = 1 << 3, | |
1674 | SRP_OPT_SERVICE_ID = 1 << 4, | |
1675 | SRP_OPT_MAX_SECT = 1 << 5, | |
52fb2b50 | 1676 | SRP_OPT_MAX_CMD_PER_LUN = 1 << 6, |
0c0450db | 1677 | SRP_OPT_IO_CLASS = 1 << 7, |
01cb9bcb | 1678 | SRP_OPT_INITIATOR_EXT = 1 << 8, |
aef9ec39 RD |
1679 | SRP_OPT_ALL = (SRP_OPT_ID_EXT | |
1680 | SRP_OPT_IOC_GUID | | |
1681 | SRP_OPT_DGID | | |
1682 | SRP_OPT_PKEY | | |
1683 | SRP_OPT_SERVICE_ID), | |
1684 | }; | |
1685 | ||
a447c093 | 1686 | static const match_table_t srp_opt_tokens = { |
52fb2b50 VP |
1687 | { SRP_OPT_ID_EXT, "id_ext=%s" }, |
1688 | { SRP_OPT_IOC_GUID, "ioc_guid=%s" }, | |
1689 | { SRP_OPT_DGID, "dgid=%s" }, | |
1690 | { SRP_OPT_PKEY, "pkey=%x" }, | |
1691 | { SRP_OPT_SERVICE_ID, "service_id=%s" }, | |
1692 | { SRP_OPT_MAX_SECT, "max_sect=%d" }, | |
1693 | { SRP_OPT_MAX_CMD_PER_LUN, "max_cmd_per_lun=%d" }, | |
0c0450db | 1694 | { SRP_OPT_IO_CLASS, "io_class=%x" }, |
01cb9bcb | 1695 | { SRP_OPT_INITIATOR_EXT, "initiator_ext=%s" }, |
52fb2b50 | 1696 | { SRP_OPT_ERR, NULL } |
aef9ec39 RD |
1697 | }; |
1698 | ||
1699 | static int srp_parse_options(const char *buf, struct srp_target_port *target) | |
1700 | { | |
1701 | char *options, *sep_opt; | |
1702 | char *p; | |
1703 | char dgid[3]; | |
1704 | substring_t args[MAX_OPT_ARGS]; | |
1705 | int opt_mask = 0; | |
1706 | int token; | |
1707 | int ret = -EINVAL; | |
1708 | int i; | |
1709 | ||
1710 | options = kstrdup(buf, GFP_KERNEL); | |
1711 | if (!options) | |
1712 | return -ENOMEM; | |
1713 | ||
1714 | sep_opt = options; | |
1715 | while ((p = strsep(&sep_opt, ",")) != NULL) { | |
1716 | if (!*p) | |
1717 | continue; | |
1718 | ||
1719 | token = match_token(p, srp_opt_tokens, args); | |
1720 | opt_mask |= token; | |
1721 | ||
1722 | switch (token) { | |
1723 | case SRP_OPT_ID_EXT: | |
1724 | p = match_strdup(args); | |
a20f3a6d IR |
1725 | if (!p) { |
1726 | ret = -ENOMEM; | |
1727 | goto out; | |
1728 | } | |
aef9ec39 RD |
1729 | target->id_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1730 | kfree(p); | |
1731 | break; | |
1732 | ||
1733 | case SRP_OPT_IOC_GUID: | |
1734 | p = match_strdup(args); | |
a20f3a6d IR |
1735 | if (!p) { |
1736 | ret = -ENOMEM; | |
1737 | goto out; | |
1738 | } | |
aef9ec39 RD |
1739 | target->ioc_guid = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1740 | kfree(p); | |
1741 | break; | |
1742 | ||
1743 | case SRP_OPT_DGID: | |
1744 | p = match_strdup(args); | |
a20f3a6d IR |
1745 | if (!p) { |
1746 | ret = -ENOMEM; | |
1747 | goto out; | |
1748 | } | |
aef9ec39 RD |
1749 | if (strlen(p) != 32) { |
1750 | printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p); | |
ce1823f0 | 1751 | kfree(p); |
aef9ec39 RD |
1752 | goto out; |
1753 | } | |
1754 | ||
1755 | for (i = 0; i < 16; ++i) { | |
1756 | strlcpy(dgid, p + i * 2, 3); | |
1757 | target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16); | |
1758 | } | |
bf17c1c7 | 1759 | kfree(p); |
3633b3d0 | 1760 | memcpy(target->orig_dgid, target->path.dgid.raw, 16); |
aef9ec39 RD |
1761 | break; |
1762 | ||
1763 | case SRP_OPT_PKEY: | |
1764 | if (match_hex(args, &token)) { | |
1765 | printk(KERN_WARNING PFX "bad P_Key parameter '%s'\n", p); | |
1766 | goto out; | |
1767 | } | |
1768 | target->path.pkey = cpu_to_be16(token); | |
1769 | break; | |
1770 | ||
1771 | case SRP_OPT_SERVICE_ID: | |
1772 | p = match_strdup(args); | |
a20f3a6d IR |
1773 | if (!p) { |
1774 | ret = -ENOMEM; | |
1775 | goto out; | |
1776 | } | |
aef9ec39 | 1777 | target->service_id = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
247e020e | 1778 | target->path.service_id = target->service_id; |
aef9ec39 RD |
1779 | kfree(p); |
1780 | break; | |
1781 | ||
1782 | case SRP_OPT_MAX_SECT: | |
1783 | if (match_int(args, &token)) { | |
1784 | printk(KERN_WARNING PFX "bad max sect parameter '%s'\n", p); | |
1785 | goto out; | |
1786 | } | |
1787 | target->scsi_host->max_sectors = token; | |
1788 | break; | |
1789 | ||
52fb2b50 VP |
1790 | case SRP_OPT_MAX_CMD_PER_LUN: |
1791 | if (match_int(args, &token)) { | |
1792 | printk(KERN_WARNING PFX "bad max cmd_per_lun parameter '%s'\n", p); | |
1793 | goto out; | |
1794 | } | |
1795 | target->scsi_host->cmd_per_lun = min(token, SRP_SQ_SIZE); | |
1796 | break; | |
1797 | ||
0c0450db R |
1798 | case SRP_OPT_IO_CLASS: |
1799 | if (match_hex(args, &token)) { | |
1800 | printk(KERN_WARNING PFX "bad IO class parameter '%s' \n", p); | |
1801 | goto out; | |
1802 | } | |
1803 | if (token != SRP_REV10_IB_IO_CLASS && | |
1804 | token != SRP_REV16A_IB_IO_CLASS) { | |
1805 | printk(KERN_WARNING PFX "unknown IO class parameter value" | |
1806 | " %x specified (use %x or %x).\n", | |
1807 | token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); | |
1808 | goto out; | |
1809 | } | |
1810 | target->io_class = token; | |
1811 | break; | |
1812 | ||
01cb9bcb IR |
1813 | case SRP_OPT_INITIATOR_EXT: |
1814 | p = match_strdup(args); | |
a20f3a6d IR |
1815 | if (!p) { |
1816 | ret = -ENOMEM; | |
1817 | goto out; | |
1818 | } | |
01cb9bcb IR |
1819 | target->initiator_ext = cpu_to_be64(simple_strtoull(p, NULL, 16)); |
1820 | kfree(p); | |
1821 | break; | |
1822 | ||
aef9ec39 RD |
1823 | default: |
1824 | printk(KERN_WARNING PFX "unknown parameter or missing value " | |
1825 | "'%s' in target creation request\n", p); | |
1826 | goto out; | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | if ((opt_mask & SRP_OPT_ALL) == SRP_OPT_ALL) | |
1831 | ret = 0; | |
1832 | else | |
1833 | for (i = 0; i < ARRAY_SIZE(srp_opt_tokens); ++i) | |
1834 | if ((srp_opt_tokens[i].token & SRP_OPT_ALL) && | |
1835 | !(srp_opt_tokens[i].token & opt_mask)) | |
1836 | printk(KERN_WARNING PFX "target creation request is " | |
1837 | "missing parameter '%s'\n", | |
1838 | srp_opt_tokens[i].pattern); | |
1839 | ||
1840 | out: | |
1841 | kfree(options); | |
1842 | return ret; | |
1843 | } | |
1844 | ||
ee959b00 TJ |
1845 | static ssize_t srp_create_target(struct device *dev, |
1846 | struct device_attribute *attr, | |
aef9ec39 RD |
1847 | const char *buf, size_t count) |
1848 | { | |
1849 | struct srp_host *host = | |
ee959b00 | 1850 | container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
1851 | struct Scsi_Host *target_host; |
1852 | struct srp_target_port *target; | |
1853 | int ret; | |
1854 | int i; | |
1855 | ||
1856 | target_host = scsi_host_alloc(&srp_template, | |
1857 | sizeof (struct srp_target_port)); | |
1858 | if (!target_host) | |
1859 | return -ENOMEM; | |
1860 | ||
3236822b | 1861 | target_host->transportt = ib_srp_transport_template; |
3c8edf0e AR |
1862 | target_host->max_lun = SRP_MAX_LUN; |
1863 | target_host->max_cmd_len = sizeof ((struct srp_cmd *) (void *) 0L)->cdb; | |
5f068992 | 1864 | |
aef9ec39 | 1865 | target = host_to_target(target_host); |
aef9ec39 | 1866 | |
0c0450db | 1867 | target->io_class = SRP_REV16A_IB_IO_CLASS; |
aef9ec39 RD |
1868 | target->scsi_host = target_host; |
1869 | target->srp_host = host; | |
1870 | ||
d945e1df | 1871 | INIT_LIST_HEAD(&target->free_reqs); |
aef9ec39 | 1872 | INIT_LIST_HEAD(&target->req_queue); |
d945e1df RD |
1873 | for (i = 0; i < SRP_SQ_SIZE; ++i) { |
1874 | target->req_ring[i].index = i; | |
1875 | list_add_tail(&target->req_ring[i].list, &target->free_reqs); | |
1876 | } | |
aef9ec39 RD |
1877 | |
1878 | ret = srp_parse_options(buf, target); | |
1879 | if (ret) | |
1880 | goto err; | |
1881 | ||
969a60f9 | 1882 | ib_query_gid(host->srp_dev->dev, host->port, 0, &target->path.sgid); |
aef9ec39 | 1883 | |
7aa54bd7 DD |
1884 | shost_printk(KERN_DEBUG, target->scsi_host, PFX |
1885 | "new target: id_ext %016llx ioc_guid %016llx pkey %04x " | |
1886 | "service_id %016llx dgid %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", | |
aef9ec39 RD |
1887 | (unsigned long long) be64_to_cpu(target->id_ext), |
1888 | (unsigned long long) be64_to_cpu(target->ioc_guid), | |
1889 | be16_to_cpu(target->path.pkey), | |
1890 | (unsigned long long) be64_to_cpu(target->service_id), | |
1891 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[0]), | |
1892 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[2]), | |
1893 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[4]), | |
1894 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[6]), | |
1895 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[8]), | |
1896 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[10]), | |
1897 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[12]), | |
1898 | (int) be16_to_cpu(*(__be16 *) &target->path.dgid.raw[14])); | |
1899 | ||
1900 | ret = srp_create_target_ib(target); | |
1901 | if (ret) | |
1902 | goto err; | |
1903 | ||
9fe4bcf4 DD |
1904 | ret = srp_new_cm_id(target); |
1905 | if (ret) | |
aef9ec39 | 1906 | goto err_free; |
aef9ec39 | 1907 | |
1033ff67 | 1908 | target->qp_in_error = 0; |
aef9ec39 RD |
1909 | ret = srp_connect_target(target); |
1910 | if (ret) { | |
7aa54bd7 DD |
1911 | shost_printk(KERN_ERR, target->scsi_host, |
1912 | PFX "Connection failed\n"); | |
aef9ec39 RD |
1913 | goto err_cm_id; |
1914 | } | |
1915 | ||
1916 | ret = srp_add_target(host, target); | |
1917 | if (ret) | |
1918 | goto err_disconnect; | |
1919 | ||
1920 | return count; | |
1921 | ||
1922 | err_disconnect: | |
1923 | srp_disconnect_target(target); | |
1924 | ||
1925 | err_cm_id: | |
1926 | ib_destroy_cm_id(target->cm_id); | |
1927 | ||
1928 | err_free: | |
1929 | srp_free_target_ib(target); | |
1930 | ||
1931 | err: | |
1932 | scsi_host_put(target_host); | |
1933 | ||
1934 | return ret; | |
1935 | } | |
1936 | ||
ee959b00 | 1937 | static DEVICE_ATTR(add_target, S_IWUSR, NULL, srp_create_target); |
aef9ec39 | 1938 | |
ee959b00 TJ |
1939 | static ssize_t show_ibdev(struct device *dev, struct device_attribute *attr, |
1940 | char *buf) | |
aef9ec39 | 1941 | { |
ee959b00 | 1942 | struct srp_host *host = container_of(dev, struct srp_host, dev); |
aef9ec39 | 1943 | |
05321937 | 1944 | return sprintf(buf, "%s\n", host->srp_dev->dev->name); |
aef9ec39 RD |
1945 | } |
1946 | ||
ee959b00 | 1947 | static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL); |
aef9ec39 | 1948 | |
ee959b00 TJ |
1949 | static ssize_t show_port(struct device *dev, struct device_attribute *attr, |
1950 | char *buf) | |
aef9ec39 | 1951 | { |
ee959b00 | 1952 | struct srp_host *host = container_of(dev, struct srp_host, dev); |
aef9ec39 RD |
1953 | |
1954 | return sprintf(buf, "%d\n", host->port); | |
1955 | } | |
1956 | ||
ee959b00 | 1957 | static DEVICE_ATTR(port, S_IRUGO, show_port, NULL); |
aef9ec39 | 1958 | |
f5358a17 | 1959 | static struct srp_host *srp_add_port(struct srp_device *device, u8 port) |
aef9ec39 RD |
1960 | { |
1961 | struct srp_host *host; | |
1962 | ||
1963 | host = kzalloc(sizeof *host, GFP_KERNEL); | |
1964 | if (!host) | |
1965 | return NULL; | |
1966 | ||
1967 | INIT_LIST_HEAD(&host->target_list); | |
b3589fd4 | 1968 | spin_lock_init(&host->target_lock); |
aef9ec39 | 1969 | init_completion(&host->released); |
05321937 | 1970 | host->srp_dev = device; |
aef9ec39 RD |
1971 | host->port = port; |
1972 | ||
ee959b00 TJ |
1973 | host->dev.class = &srp_class; |
1974 | host->dev.parent = device->dev->dma_device; | |
1975 | snprintf(host->dev.bus_id, BUS_ID_SIZE, "srp-%s-%d", | |
f5358a17 | 1976 | device->dev->name, port); |
aef9ec39 | 1977 | |
ee959b00 | 1978 | if (device_register(&host->dev)) |
f5358a17 | 1979 | goto free_host; |
ee959b00 | 1980 | if (device_create_file(&host->dev, &dev_attr_add_target)) |
aef9ec39 | 1981 | goto err_class; |
ee959b00 | 1982 | if (device_create_file(&host->dev, &dev_attr_ibdev)) |
aef9ec39 | 1983 | goto err_class; |
ee959b00 | 1984 | if (device_create_file(&host->dev, &dev_attr_port)) |
aef9ec39 RD |
1985 | goto err_class; |
1986 | ||
1987 | return host; | |
1988 | ||
1989 | err_class: | |
ee959b00 | 1990 | device_unregister(&host->dev); |
aef9ec39 | 1991 | |
f5358a17 | 1992 | free_host: |
aef9ec39 RD |
1993 | kfree(host); |
1994 | ||
1995 | return NULL; | |
1996 | } | |
1997 | ||
1998 | static void srp_add_one(struct ib_device *device) | |
1999 | { | |
f5358a17 RD |
2000 | struct srp_device *srp_dev; |
2001 | struct ib_device_attr *dev_attr; | |
2002 | struct ib_fmr_pool_param fmr_param; | |
aef9ec39 | 2003 | struct srp_host *host; |
aef9ec39 RD |
2004 | int s, e, p; |
2005 | ||
f5358a17 RD |
2006 | dev_attr = kmalloc(sizeof *dev_attr, GFP_KERNEL); |
2007 | if (!dev_attr) | |
cf311cd4 | 2008 | return; |
aef9ec39 | 2009 | |
f5358a17 RD |
2010 | if (ib_query_device(device, dev_attr)) { |
2011 | printk(KERN_WARNING PFX "Query device failed for %s\n", | |
2012 | device->name); | |
2013 | goto free_attr; | |
2014 | } | |
2015 | ||
2016 | srp_dev = kmalloc(sizeof *srp_dev, GFP_KERNEL); | |
2017 | if (!srp_dev) | |
2018 | goto free_attr; | |
2019 | ||
2020 | /* | |
2021 | * Use the smallest page size supported by the HCA, down to a | |
2022 | * minimum of 512 bytes (which is the smallest sector that a | |
2023 | * SCSI command will ever carry). | |
2024 | */ | |
2025 | srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1); | |
2026 | srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift; | |
bf628dc2 | 2027 | srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1); |
f5358a17 RD |
2028 | |
2029 | INIT_LIST_HEAD(&srp_dev->dev_list); | |
2030 | ||
2031 | srp_dev->dev = device; | |
2032 | srp_dev->pd = ib_alloc_pd(device); | |
2033 | if (IS_ERR(srp_dev->pd)) | |
2034 | goto free_dev; | |
2035 | ||
2036 | srp_dev->mr = ib_get_dma_mr(srp_dev->pd, | |
2037 | IB_ACCESS_LOCAL_WRITE | | |
2038 | IB_ACCESS_REMOTE_READ | | |
2039 | IB_ACCESS_REMOTE_WRITE); | |
2040 | if (IS_ERR(srp_dev->mr)) | |
2041 | goto err_pd; | |
2042 | ||
2043 | memset(&fmr_param, 0, sizeof fmr_param); | |
2044 | fmr_param.pool_size = SRP_FMR_POOL_SIZE; | |
2045 | fmr_param.dirty_watermark = SRP_FMR_DIRTY_SIZE; | |
2046 | fmr_param.cache = 1; | |
2047 | fmr_param.max_pages_per_fmr = SRP_FMR_SIZE; | |
2048 | fmr_param.page_shift = srp_dev->fmr_page_shift; | |
2049 | fmr_param.access = (IB_ACCESS_LOCAL_WRITE | | |
2050 | IB_ACCESS_REMOTE_WRITE | | |
2051 | IB_ACCESS_REMOTE_READ); | |
2052 | ||
2053 | srp_dev->fmr_pool = ib_create_fmr_pool(srp_dev->pd, &fmr_param); | |
2054 | if (IS_ERR(srp_dev->fmr_pool)) | |
2055 | srp_dev->fmr_pool = NULL; | |
aef9ec39 | 2056 | |
07ebafba | 2057 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
aef9ec39 RD |
2058 | s = 0; |
2059 | e = 0; | |
2060 | } else { | |
2061 | s = 1; | |
2062 | e = device->phys_port_cnt; | |
2063 | } | |
2064 | ||
2065 | for (p = s; p <= e; ++p) { | |
f5358a17 | 2066 | host = srp_add_port(srp_dev, p); |
aef9ec39 | 2067 | if (host) |
f5358a17 | 2068 | list_add_tail(&host->list, &srp_dev->dev_list); |
aef9ec39 RD |
2069 | } |
2070 | ||
f5358a17 RD |
2071 | ib_set_client_data(device, &srp_client, srp_dev); |
2072 | ||
2073 | goto free_attr; | |
2074 | ||
2075 | err_pd: | |
2076 | ib_dealloc_pd(srp_dev->pd); | |
2077 | ||
2078 | free_dev: | |
2079 | kfree(srp_dev); | |
2080 | ||
2081 | free_attr: | |
2082 | kfree(dev_attr); | |
aef9ec39 RD |
2083 | } |
2084 | ||
2085 | static void srp_remove_one(struct ib_device *device) | |
2086 | { | |
f5358a17 | 2087 | struct srp_device *srp_dev; |
aef9ec39 RD |
2088 | struct srp_host *host, *tmp_host; |
2089 | LIST_HEAD(target_list); | |
2090 | struct srp_target_port *target, *tmp_target; | |
aef9ec39 | 2091 | |
f5358a17 | 2092 | srp_dev = ib_get_client_data(device, &srp_client); |
aef9ec39 | 2093 | |
f5358a17 | 2094 | list_for_each_entry_safe(host, tmp_host, &srp_dev->dev_list, list) { |
ee959b00 | 2095 | device_unregister(&host->dev); |
aef9ec39 RD |
2096 | /* |
2097 | * Wait for the sysfs entry to go away, so that no new | |
2098 | * target ports can be created. | |
2099 | */ | |
2100 | wait_for_completion(&host->released); | |
2101 | ||
2102 | /* | |
2103 | * Mark all target ports as removed, so we stop queueing | |
2104 | * commands and don't try to reconnect. | |
2105 | */ | |
b3589fd4 | 2106 | spin_lock(&host->target_lock); |
549c5fc2 | 2107 | list_for_each_entry(target, &host->target_list, list) { |
0c5b3952 IR |
2108 | spin_lock_irq(target->scsi_host->host_lock); |
2109 | target->state = SRP_TARGET_REMOVED; | |
2110 | spin_unlock_irq(target->scsi_host->host_lock); | |
aef9ec39 | 2111 | } |
b3589fd4 | 2112 | spin_unlock(&host->target_lock); |
aef9ec39 RD |
2113 | |
2114 | /* | |
2115 | * Wait for any reconnection tasks that may have | |
2116 | * started before we marked our target ports as | |
2117 | * removed, and any target port removal tasks. | |
2118 | */ | |
2119 | flush_scheduled_work(); | |
2120 | ||
2121 | list_for_each_entry_safe(target, tmp_target, | |
2122 | &host->target_list, list) { | |
b0e47c8b | 2123 | srp_remove_host(target->scsi_host); |
ad696989 | 2124 | scsi_remove_host(target->scsi_host); |
aef9ec39 RD |
2125 | srp_disconnect_target(target); |
2126 | ib_destroy_cm_id(target->cm_id); | |
2127 | srp_free_target_ib(target); | |
2128 | scsi_host_put(target->scsi_host); | |
2129 | } | |
2130 | ||
aef9ec39 RD |
2131 | kfree(host); |
2132 | } | |
2133 | ||
f5358a17 RD |
2134 | if (srp_dev->fmr_pool) |
2135 | ib_destroy_fmr_pool(srp_dev->fmr_pool); | |
2136 | ib_dereg_mr(srp_dev->mr); | |
2137 | ib_dealloc_pd(srp_dev->pd); | |
2138 | ||
2139 | kfree(srp_dev); | |
aef9ec39 RD |
2140 | } |
2141 | ||
3236822b FT |
2142 | static struct srp_function_template ib_srp_transport_functions = { |
2143 | }; | |
2144 | ||
aef9ec39 RD |
2145 | static int __init srp_init_module(void) |
2146 | { | |
2147 | int ret; | |
2148 | ||
1e89a194 DD |
2149 | if (srp_sg_tablesize > 255) { |
2150 | printk(KERN_WARNING PFX "Clamping srp_sg_tablesize to 255\n"); | |
2151 | srp_sg_tablesize = 255; | |
2152 | } | |
2153 | ||
3236822b FT |
2154 | ib_srp_transport_template = |
2155 | srp_attach_transport(&ib_srp_transport_functions); | |
2156 | if (!ib_srp_transport_template) | |
2157 | return -ENOMEM; | |
2158 | ||
74b0a15b VP |
2159 | srp_template.sg_tablesize = srp_sg_tablesize; |
2160 | srp_max_iu_len = (sizeof (struct srp_cmd) + | |
2161 | sizeof (struct srp_indirect_buf) + | |
2162 | srp_sg_tablesize * 16); | |
2163 | ||
aef9ec39 RD |
2164 | ret = class_register(&srp_class); |
2165 | if (ret) { | |
2166 | printk(KERN_ERR PFX "couldn't register class infiniband_srp\n"); | |
3236822b | 2167 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2168 | return ret; |
2169 | } | |
2170 | ||
c1a0b23b MT |
2171 | ib_sa_register_client(&srp_sa_client); |
2172 | ||
aef9ec39 RD |
2173 | ret = ib_register_client(&srp_client); |
2174 | if (ret) { | |
2175 | printk(KERN_ERR PFX "couldn't register IB client\n"); | |
3236822b | 2176 | srp_release_transport(ib_srp_transport_template); |
c1a0b23b | 2177 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 RD |
2178 | class_unregister(&srp_class); |
2179 | return ret; | |
2180 | } | |
2181 | ||
2182 | return 0; | |
2183 | } | |
2184 | ||
2185 | static void __exit srp_cleanup_module(void) | |
2186 | { | |
2187 | ib_unregister_client(&srp_client); | |
c1a0b23b | 2188 | ib_sa_unregister_client(&srp_sa_client); |
aef9ec39 | 2189 | class_unregister(&srp_class); |
3236822b | 2190 | srp_release_transport(ib_srp_transport_template); |
aef9ec39 RD |
2191 | } |
2192 | ||
2193 | module_init(srp_init_module); | |
2194 | module_exit(srp_cleanup_module); |