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1cfa0a75 OG |
1 | /* |
2 | * Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved. | |
3 | * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. | |
3ee07d27 | 4 | * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved. |
1cfa0a75 OG |
5 | * |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
1cfa0a75 | 33 | */ |
1cfa0a75 OG |
34 | #include <linux/kernel.h> |
35 | #include <linux/module.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
1cfa0a75 | 37 | #include <linux/delay.h> |
1cfa0a75 OG |
38 | |
39 | #include "iscsi_iser.h" | |
40 | ||
41 | #define ISCSI_ISER_MAX_CONN 8 | |
6aabfa76 SG |
42 | #define ISER_MAX_RX_LEN (ISER_QP_MAX_RECV_DTOS * ISCSI_ISER_MAX_CONN) |
43 | #define ISER_MAX_TX_LEN (ISER_QP_MAX_REQ_DTOS * ISCSI_ISER_MAX_CONN) | |
ff3dd52d SG |
44 | #define ISER_MAX_CQ_LEN (ISER_MAX_RX_LEN + ISER_MAX_TX_LEN + \ |
45 | ISCSI_ISER_MAX_CONN) | |
1cfa0a75 | 46 | |
1cfa0a75 OG |
47 | static void iser_qp_event_callback(struct ib_event *cause, void *context) |
48 | { | |
871e00af SG |
49 | iser_err("qp event %s (%d)\n", |
50 | ib_event_msg(cause->event), cause->event); | |
1cfa0a75 OG |
51 | } |
52 | ||
2110f9bf OG |
53 | static void iser_event_handler(struct ib_event_handler *handler, |
54 | struct ib_event *event) | |
55 | { | |
871e00af SG |
56 | iser_err("async event %s (%d) on device %s port %d\n", |
57 | ib_event_msg(event->event), event->event, | |
58 | event->device->name, event->element.port_num); | |
2110f9bf OG |
59 | } |
60 | ||
1cfa0a75 OG |
61 | /** |
62 | * iser_create_device_ib_res - creates Protection Domain (PD), Completion | |
63 | * Queue (CQ), DMA Memory Region (DMA MR) with the device associated with | |
64 | * the adapator. | |
65 | * | |
66 | * returns 0 on success, -1 on failure | |
67 | */ | |
68 | static int iser_create_device_ib_res(struct iser_device *device) | |
69 | { | |
4a061b28 | 70 | struct ib_device *ib_dev = device->ib_device; |
f4641ef7 | 71 | int ret, i, max_cqe; |
5a33a669 | 72 | |
48afbff6 SG |
73 | ret = iser_assign_reg_ops(device); |
74 | if (ret) | |
75 | return ret; | |
b4e155ff | 76 | |
da64bdb2 | 77 | device->comps_used = min_t(int, num_online_cpus(), |
4a061b28 | 78 | ib_dev->num_comp_vectors); |
f4641ef7 | 79 | |
da64bdb2 SG |
80 | device->comps = kcalloc(device->comps_used, sizeof(*device->comps), |
81 | GFP_KERNEL); | |
82 | if (!device->comps) | |
83 | goto comps_err; | |
84 | ||
4a061b28 | 85 | max_cqe = min(ISER_MAX_CQ_LEN, ib_dev->attrs.max_cqe); |
f4641ef7 MT |
86 | |
87 | iser_info("using %d CQs, device %s supports %d vectors max_cqe %d\n", | |
4a061b28 OG |
88 | device->comps_used, ib_dev->name, |
89 | ib_dev->num_comp_vectors, max_cqe); | |
5a33a669 | 90 | |
8e61212d CH |
91 | device->pd = ib_alloc_pd(ib_dev, |
92 | iser_always_reg ? 0 : IB_PD_UNSAFE_GLOBAL_RKEY); | |
1cfa0a75 OG |
93 | if (IS_ERR(device->pd)) |
94 | goto pd_err; | |
95 | ||
bf175540 SG |
96 | for (i = 0; i < device->comps_used; i++) { |
97 | struct iser_comp *comp = &device->comps[i]; | |
98 | ||
882f3b3b DL |
99 | comp->cq = ib_alloc_cq(ib_dev, comp, max_cqe, i, |
100 | IB_POLL_SOFTIRQ); | |
6aabfa76 SG |
101 | if (IS_ERR(comp->cq)) { |
102 | comp->cq = NULL; | |
5a33a669 | 103 | goto cq_err; |
c33b15f0 | 104 | } |
5a33a669 | 105 | } |
1cfa0a75 | 106 | |
882f3b3b DL |
107 | INIT_IB_EVENT_HANDLER(&device->event_handler, ib_dev, |
108 | iser_event_handler); | |
2110f9bf | 109 | if (ib_register_event_handler(&device->event_handler)) |
8e61212d | 110 | goto cq_err; |
2110f9bf | 111 | |
1cfa0a75 OG |
112 | return 0; |
113 | ||
5a33a669 | 114 | cq_err: |
bf175540 SG |
115 | for (i = 0; i < device->comps_used; i++) { |
116 | struct iser_comp *comp = &device->comps[i]; | |
117 | ||
6aabfa76 | 118 | if (comp->cq) |
cfeb91b3 | 119 | ib_free_cq(comp->cq); |
5a33a669 | 120 | } |
1cfa0a75 OG |
121 | ib_dealloc_pd(device->pd); |
122 | pd_err: | |
da64bdb2 SG |
123 | kfree(device->comps); |
124 | comps_err: | |
1cfa0a75 OG |
125 | iser_err("failed to allocate an IB resource\n"); |
126 | return -1; | |
127 | } | |
128 | ||
129 | /** | |
38dc732f | 130 | * iser_free_device_ib_res - destroy/dealloc/dereg the DMA MR, |
1cfa0a75 OG |
131 | * CQ and PD created with the device associated with the adapator. |
132 | */ | |
133 | static void iser_free_device_ib_res(struct iser_device *device) | |
134 | { | |
5a33a669 | 135 | int i; |
1cfa0a75 | 136 | |
bf175540 SG |
137 | for (i = 0; i < device->comps_used; i++) { |
138 | struct iser_comp *comp = &device->comps[i]; | |
139 | ||
cfeb91b3 | 140 | ib_free_cq(comp->cq); |
6aabfa76 | 141 | comp->cq = NULL; |
5a33a669 AT |
142 | } |
143 | ||
2110f9bf | 144 | (void)ib_unregister_event_handler(&device->event_handler); |
7dd78647 | 145 | ib_dealloc_pd(device->pd); |
1cfa0a75 | 146 | |
da64bdb2 SG |
147 | kfree(device->comps); |
148 | device->comps = NULL; | |
1cfa0a75 OG |
149 | device->pd = NULL; |
150 | } | |
151 | ||
152 | /** | |
48afbff6 | 153 | * iser_alloc_fmr_pool - Creates FMR pool and page_vector |
1cfa0a75 | 154 | * |
986db0d6 | 155 | * returns 0 on success, or errno code on failure |
1cfa0a75 | 156 | */ |
f8db651d SG |
157 | int iser_alloc_fmr_pool(struct ib_conn *ib_conn, |
158 | unsigned cmds_max, | |
159 | unsigned int size) | |
1cfa0a75 | 160 | { |
a4ee3539 | 161 | struct iser_device *device = ib_conn->device; |
385ad87d SG |
162 | struct iser_fr_pool *fr_pool = &ib_conn->fr_pool; |
163 | struct iser_page_vec *page_vec; | |
2b3bf958 | 164 | struct iser_fr_desc *desc; |
385ad87d | 165 | struct ib_fmr_pool *fmr_pool; |
1cfa0a75 | 166 | struct ib_fmr_pool_param params; |
2b3bf958 | 167 | int ret; |
bcc60c38 | 168 | |
2b3bf958 | 169 | INIT_LIST_HEAD(&fr_pool->list); |
385ad87d SG |
170 | spin_lock_init(&fr_pool->lock); |
171 | ||
2b3bf958 AL |
172 | desc = kzalloc(sizeof(*desc), GFP_KERNEL); |
173 | if (!desc) | |
174 | return -ENOMEM; | |
175 | ||
f8db651d | 176 | page_vec = kmalloc(sizeof(*page_vec) + (sizeof(u64) * size), |
385ad87d | 177 | GFP_KERNEL); |
2b3bf958 AL |
178 | if (!page_vec) { |
179 | ret = -ENOMEM; | |
180 | goto err_frpl; | |
181 | } | |
9fda1ac5 | 182 | |
385ad87d | 183 | page_vec->pages = (u64 *)(page_vec + 1); |
1cfa0a75 | 184 | |
8dfa0876 | 185 | params.page_shift = SHIFT_4K; |
f8db651d | 186 | params.max_pages_per_fmr = size; |
1cfa0a75 OG |
187 | /* make the pool size twice the max number of SCSI commands * |
188 | * the ML is expected to queue, watermark for unmap at 50% */ | |
b7f04513 SP |
189 | params.pool_size = cmds_max * 2; |
190 | params.dirty_watermark = cmds_max; | |
1cfa0a75 OG |
191 | params.cache = 0; |
192 | params.flush_function = NULL; | |
193 | params.access = (IB_ACCESS_LOCAL_WRITE | | |
194 | IB_ACCESS_REMOTE_WRITE | | |
195 | IB_ACCESS_REMOTE_READ); | |
196 | ||
385ad87d SG |
197 | fmr_pool = ib_create_fmr_pool(device->pd, ¶ms); |
198 | if (IS_ERR(fmr_pool)) { | |
199 | ret = PTR_ERR(fmr_pool); | |
8c18ed03 | 200 | iser_err("FMR allocation failed, err %d\n", ret); |
2b3bf958 | 201 | goto err_fmr; |
8c18ed03 SG |
202 | } |
203 | ||
2b3bf958 AL |
204 | desc->rsc.page_vec = page_vec; |
205 | desc->rsc.fmr_pool = fmr_pool; | |
206 | list_add(&desc->list, &fr_pool->list); | |
385ad87d | 207 | |
8c18ed03 | 208 | return 0; |
986db0d6 | 209 | |
2b3bf958 | 210 | err_fmr: |
385ad87d | 211 | kfree(page_vec); |
2b3bf958 AL |
212 | err_frpl: |
213 | kfree(desc); | |
214 | ||
8c18ed03 | 215 | return ret; |
986db0d6 SP |
216 | } |
217 | ||
218 | /** | |
219 | * iser_free_fmr_pool - releases the FMR pool and page vec | |
220 | */ | |
a4ee3539 | 221 | void iser_free_fmr_pool(struct ib_conn *ib_conn) |
986db0d6 | 222 | { |
385ad87d | 223 | struct iser_fr_pool *fr_pool = &ib_conn->fr_pool; |
2b3bf958 AL |
224 | struct iser_fr_desc *desc; |
225 | ||
226 | desc = list_first_entry(&fr_pool->list, | |
227 | struct iser_fr_desc, list); | |
228 | list_del(&desc->list); | |
986db0d6 | 229 | |
385ad87d | 230 | iser_info("freeing conn %p fmr pool %p\n", |
2b3bf958 | 231 | ib_conn, desc->rsc.fmr_pool); |
986db0d6 | 232 | |
2b3bf958 AL |
233 | ib_destroy_fmr_pool(desc->rsc.fmr_pool); |
234 | kfree(desc->rsc.page_vec); | |
235 | kfree(desc); | |
986db0d6 SP |
236 | } |
237 | ||
d711d81d | 238 | static int |
318d311e | 239 | iser_alloc_reg_res(struct iser_device *device, |
f8db651d SG |
240 | struct ib_pd *pd, |
241 | struct iser_reg_resources *res, | |
242 | unsigned int size) | |
d711d81d | 243 | { |
318d311e SG |
244 | struct ib_device *ib_dev = device->ib_device; |
245 | enum ib_mr_type mr_type; | |
d711d81d SG |
246 | int ret; |
247 | ||
318d311e SG |
248 | if (ib_dev->attrs.device_cap_flags & IB_DEVICE_SG_GAPS_REG) |
249 | mr_type = IB_MR_TYPE_SG_GAPS; | |
250 | else | |
251 | mr_type = IB_MR_TYPE_MEM_REG; | |
252 | ||
253 | res->mr = ib_alloc_mr(pd, mr_type, size); | |
d711d81d SG |
254 | if (IS_ERR(res->mr)) { |
255 | ret = PTR_ERR(res->mr); | |
256 | iser_err("Failed to allocate ib_fast_reg_mr err=%d\n", ret); | |
39405885 | 257 | return ret; |
d711d81d | 258 | } |
1caa70d8 | 259 | res->mr_valid = 0; |
d711d81d SG |
260 | |
261 | return 0; | |
d711d81d SG |
262 | } |
263 | ||
264 | static void | |
265 | iser_free_reg_res(struct iser_reg_resources *rsc) | |
266 | { | |
267 | ib_dereg_mr(rsc->mr); | |
d711d81d SG |
268 | } |
269 | ||
4dec2a27 | 270 | static int |
318d311e | 271 | iser_alloc_pi_ctx(struct iser_device *device, |
f8db651d SG |
272 | struct ib_pd *pd, |
273 | struct iser_fr_desc *desc, | |
274 | unsigned int size) | |
4dec2a27 SG |
275 | { |
276 | struct iser_pi_context *pi_ctx = NULL; | |
9bee178b | 277 | int ret; |
4dec2a27 SG |
278 | |
279 | desc->pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL); | |
280 | if (!desc->pi_ctx) | |
281 | return -ENOMEM; | |
282 | ||
283 | pi_ctx = desc->pi_ctx; | |
284 | ||
318d311e | 285 | ret = iser_alloc_reg_res(device, pd, &pi_ctx->rsc, size); |
d711d81d SG |
286 | if (ret) { |
287 | iser_err("failed to allocate reg_resources\n"); | |
288 | goto alloc_reg_res_err; | |
4dec2a27 | 289 | } |
4dec2a27 | 290 | |
9bee178b | 291 | pi_ctx->sig_mr = ib_alloc_mr(pd, IB_MR_TYPE_SIGNATURE, 2); |
4dec2a27 SG |
292 | if (IS_ERR(pi_ctx->sig_mr)) { |
293 | ret = PTR_ERR(pi_ctx->sig_mr); | |
294 | goto sig_mr_failure; | |
295 | } | |
1caa70d8 | 296 | pi_ctx->sig_mr_valid = 0; |
d711d81d | 297 | desc->pi_ctx->sig_protected = 0; |
4dec2a27 SG |
298 | |
299 | return 0; | |
300 | ||
301 | sig_mr_failure: | |
d711d81d SG |
302 | iser_free_reg_res(&pi_ctx->rsc); |
303 | alloc_reg_res_err: | |
4dec2a27 SG |
304 | kfree(desc->pi_ctx); |
305 | ||
306 | return ret; | |
307 | } | |
308 | ||
309 | static void | |
310 | iser_free_pi_ctx(struct iser_pi_context *pi_ctx) | |
311 | { | |
d711d81d | 312 | iser_free_reg_res(&pi_ctx->rsc); |
8b91ffc1 | 313 | ib_dereg_mr(pi_ctx->sig_mr); |
4dec2a27 SG |
314 | kfree(pi_ctx); |
315 | } | |
316 | ||
eb6ea8c3 | 317 | static struct iser_fr_desc * |
318d311e | 318 | iser_create_fastreg_desc(struct iser_device *device, |
f8db651d SG |
319 | struct ib_pd *pd, |
320 | bool pi_enable, | |
321 | unsigned int size) | |
310b347c | 322 | { |
eb6ea8c3 | 323 | struct iser_fr_desc *desc; |
310b347c SG |
324 | int ret; |
325 | ||
eb6ea8c3 SG |
326 | desc = kzalloc(sizeof(*desc), GFP_KERNEL); |
327 | if (!desc) | |
328 | return ERR_PTR(-ENOMEM); | |
329 | ||
318d311e | 330 | ret = iser_alloc_reg_res(device, pd, &desc->rsc, size); |
eb6ea8c3 SG |
331 | if (ret) |
332 | goto reg_res_alloc_failure; | |
6b5a8fb0 AT |
333 | |
334 | if (pi_enable) { | |
318d311e | 335 | ret = iser_alloc_pi_ctx(device, pd, desc, size); |
4dec2a27 | 336 | if (ret) |
6b5a8fb0 | 337 | goto pi_ctx_alloc_failure; |
6b5a8fb0 | 338 | } |
310b347c | 339 | |
eb6ea8c3 | 340 | return desc; |
d711d81d | 341 | |
6b5a8fb0 | 342 | pi_ctx_alloc_failure: |
d711d81d | 343 | iser_free_reg_res(&desc->rsc); |
eb6ea8c3 SG |
344 | reg_res_alloc_failure: |
345 | kfree(desc); | |
310b347c | 346 | |
eb6ea8c3 | 347 | return ERR_PTR(ret); |
310b347c SG |
348 | } |
349 | ||
5587856c | 350 | /** |
48afbff6 | 351 | * iser_alloc_fastreg_pool - Creates pool of fast_reg descriptors |
5587856c SG |
352 | * for fast registration work requests. |
353 | * returns 0 on success, or errno code on failure | |
354 | */ | |
f8db651d SG |
355 | int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, |
356 | unsigned cmds_max, | |
357 | unsigned int size) | |
5587856c | 358 | { |
a4ee3539 | 359 | struct iser_device *device = ib_conn->device; |
385ad87d | 360 | struct iser_fr_pool *fr_pool = &ib_conn->fr_pool; |
5190cc26 | 361 | struct iser_fr_desc *desc; |
5587856c SG |
362 | int i, ret; |
363 | ||
2b3bf958 | 364 | INIT_LIST_HEAD(&fr_pool->list); |
ea174c95 | 365 | INIT_LIST_HEAD(&fr_pool->all_list); |
385ad87d | 366 | spin_lock_init(&fr_pool->lock); |
2b3bf958 | 367 | fr_pool->size = 0; |
5587856c | 368 | for (i = 0; i < cmds_max; i++) { |
318d311e | 369 | desc = iser_create_fastreg_desc(device, device->pd, |
f8db651d | 370 | ib_conn->pi_support, size); |
eb6ea8c3 SG |
371 | if (IS_ERR(desc)) { |
372 | ret = PTR_ERR(desc); | |
310b347c | 373 | goto err; |
5587856c SG |
374 | } |
375 | ||
2b3bf958 | 376 | list_add_tail(&desc->list, &fr_pool->list); |
ea174c95 | 377 | list_add_tail(&desc->all_list, &fr_pool->all_list); |
2b3bf958 | 378 | fr_pool->size++; |
5587856c SG |
379 | } |
380 | ||
381 | return 0; | |
27ae2d1e | 382 | |
5587856c | 383 | err: |
a4ee3539 | 384 | iser_free_fastreg_pool(ib_conn); |
5587856c SG |
385 | return ret; |
386 | } | |
387 | ||
388 | /** | |
7306b8fa | 389 | * iser_free_fastreg_pool - releases the pool of fast_reg descriptors |
5587856c | 390 | */ |
a4ee3539 | 391 | void iser_free_fastreg_pool(struct ib_conn *ib_conn) |
5587856c | 392 | { |
385ad87d | 393 | struct iser_fr_pool *fr_pool = &ib_conn->fr_pool; |
5190cc26 | 394 | struct iser_fr_desc *desc, *tmp; |
5587856c SG |
395 | int i = 0; |
396 | ||
ea174c95 | 397 | if (list_empty(&fr_pool->all_list)) |
5587856c SG |
398 | return; |
399 | ||
a4ee3539 | 400 | iser_info("freeing conn %p fr pool\n", ib_conn); |
5587856c | 401 | |
ea174c95 SG |
402 | list_for_each_entry_safe(desc, tmp, &fr_pool->all_list, all_list) { |
403 | list_del(&desc->all_list); | |
d711d81d | 404 | iser_free_reg_res(&desc->rsc); |
4dec2a27 SG |
405 | if (desc->pi_ctx) |
406 | iser_free_pi_ctx(desc->pi_ctx); | |
5587856c SG |
407 | kfree(desc); |
408 | ++i; | |
409 | } | |
410 | ||
2b3bf958 | 411 | if (i < fr_pool->size) |
5587856c | 412 | iser_warn("pool still has %d regions registered\n", |
2b3bf958 | 413 | fr_pool->size - i); |
5587856c SG |
414 | } |
415 | ||
986db0d6 SP |
416 | /** |
417 | * iser_create_ib_conn_res - Queue-Pair (QP) | |
418 | * | |
419 | * returns 0 on success, -1 on failure | |
420 | */ | |
a4ee3539 | 421 | static int iser_create_ib_conn_res(struct ib_conn *ib_conn) |
986db0d6 | 422 | { |
7edc5a99 | 423 | struct iser_conn *iser_conn = to_iser_conn(ib_conn); |
986db0d6 | 424 | struct iser_device *device; |
4a061b28 | 425 | struct ib_device *ib_dev; |
986db0d6 SP |
426 | struct ib_qp_init_attr init_attr; |
427 | int ret = -ENOMEM; | |
428 | int index, min_index = 0; | |
429 | ||
a4ee3539 | 430 | BUG_ON(ib_conn->device == NULL); |
986db0d6 | 431 | |
a4ee3539 | 432 | device = ib_conn->device; |
4a061b28 | 433 | ib_dev = device->ib_device; |
1cfa0a75 OG |
434 | |
435 | memset(&init_attr, 0, sizeof init_attr); | |
436 | ||
5a33a669 AT |
437 | mutex_lock(&ig.connlist_mutex); |
438 | /* select the CQ with the minimal number of usages */ | |
bf175540 SG |
439 | for (index = 0; index < device->comps_used; index++) { |
440 | if (device->comps[index].active_qps < | |
441 | device->comps[min_index].active_qps) | |
5a33a669 | 442 | min_index = index; |
bf175540 SG |
443 | } |
444 | ib_conn->comp = &device->comps[min_index]; | |
445 | ib_conn->comp->active_qps++; | |
5a33a669 | 446 | mutex_unlock(&ig.connlist_mutex); |
a4ee3539 | 447 | iser_info("cq index %d used for ib_conn %p\n", min_index, ib_conn); |
5a33a669 | 448 | |
1cfa0a75 | 449 | init_attr.event_handler = iser_qp_event_callback; |
a4ee3539 | 450 | init_attr.qp_context = (void *)ib_conn; |
6aabfa76 SG |
451 | init_attr.send_cq = ib_conn->comp->cq; |
452 | init_attr.recv_cq = ib_conn->comp->cq; | |
1cfa0a75 | 453 | init_attr.cap.max_recv_wr = ISER_QP_MAX_RECV_DTOS; |
f19624aa | 454 | init_attr.cap.max_send_sge = 2; |
bcc60c38 | 455 | init_attr.cap.max_recv_sge = 1; |
1cfa0a75 OG |
456 | init_attr.sq_sig_type = IB_SIGNAL_REQ_WR; |
457 | init_attr.qp_type = IB_QPT_RC; | |
a4ee3539 | 458 | if (ib_conn->pi_support) { |
ff3dd52d | 459 | init_attr.cap.max_send_wr = ISER_QP_SIG_MAX_REQ_DTOS + 1; |
6b5a8fb0 | 460 | init_attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; |
f4641ef7 MT |
461 | iser_conn->max_cmds = |
462 | ISER_GET_MAX_XMIT_CMDS(ISER_QP_SIG_MAX_REQ_DTOS); | |
6b5a8fb0 | 463 | } else { |
4a061b28 | 464 | if (ib_dev->attrs.max_qp_wr > ISER_QP_MAX_REQ_DTOS) { |
f4641ef7 MT |
465 | init_attr.cap.max_send_wr = ISER_QP_MAX_REQ_DTOS + 1; |
466 | iser_conn->max_cmds = | |
467 | ISER_GET_MAX_XMIT_CMDS(ISER_QP_MAX_REQ_DTOS); | |
468 | } else { | |
4a061b28 | 469 | init_attr.cap.max_send_wr = ib_dev->attrs.max_qp_wr; |
f4641ef7 | 470 | iser_conn->max_cmds = |
4a061b28 | 471 | ISER_GET_MAX_XMIT_CMDS(ib_dev->attrs.max_qp_wr); |
f4641ef7 | 472 | iser_dbg("device %s supports max_send_wr %d\n", |
4a061b28 | 473 | device->ib_device->name, ib_dev->attrs.max_qp_wr); |
f4641ef7 | 474 | } |
6b5a8fb0 | 475 | } |
1cfa0a75 | 476 | |
a4ee3539 | 477 | ret = rdma_create_qp(ib_conn->cma_id, device->pd, &init_attr); |
1cfa0a75 | 478 | if (ret) |
9fda1ac5 | 479 | goto out_err; |
1cfa0a75 | 480 | |
a4ee3539 | 481 | ib_conn->qp = ib_conn->cma_id->qp; |
986db0d6 | 482 | iser_info("setting conn %p cma_id %p qp %p\n", |
a4ee3539 SG |
483 | ib_conn, ib_conn->cma_id, |
484 | ib_conn->cma_id->qp); | |
1cfa0a75 OG |
485 | return ret; |
486 | ||
9fda1ac5 | 487 | out_err: |
93acb7bb SG |
488 | mutex_lock(&ig.connlist_mutex); |
489 | ib_conn->comp->active_qps--; | |
490 | mutex_unlock(&ig.connlist_mutex); | |
1cfa0a75 | 491 | iser_err("unable to alloc mem or create resource, err %d\n", ret); |
93acb7bb | 492 | |
1cfa0a75 OG |
493 | return ret; |
494 | } | |
495 | ||
1cfa0a75 OG |
496 | /** |
497 | * based on the resolved device node GUID see if there already allocated | |
498 | * device for this device. If there's no such, create one. | |
499 | */ | |
500 | static | |
501 | struct iser_device *iser_device_find_by_ib_device(struct rdma_cm_id *cma_id) | |
502 | { | |
9a378270 | 503 | struct iser_device *device; |
1cfa0a75 OG |
504 | |
505 | mutex_lock(&ig.device_list_mutex); | |
506 | ||
9a378270 | 507 | list_for_each_entry(device, &ig.device_list, ig_list) |
1cfa0a75 OG |
508 | /* find if there's a match using the node GUID */ |
509 | if (device->ib_device->node_guid == cma_id->device->node_guid) | |
d33ed425 | 510 | goto inc_refcnt; |
9a378270 AR |
511 | |
512 | device = kzalloc(sizeof *device, GFP_KERNEL); | |
513 | if (device == NULL) | |
514 | goto out; | |
515 | ||
516 | /* assign this device to the device */ | |
517 | device->ib_device = cma_id->device; | |
518 | /* init the device and link it into ig device list */ | |
519 | if (iser_create_device_ib_res(device)) { | |
520 | kfree(device); | |
521 | device = NULL; | |
522 | goto out; | |
1cfa0a75 | 523 | } |
9a378270 AR |
524 | list_add(&device->ig_list, &ig.device_list); |
525 | ||
d33ed425 | 526 | inc_refcnt: |
1cfa0a75 | 527 | device->refcount++; |
d33ed425 | 528 | out: |
1cfa0a75 OG |
529 | mutex_unlock(&ig.device_list_mutex); |
530 | return device; | |
531 | } | |
532 | ||
533 | /* if there's no demand for this device, release it */ | |
534 | static void iser_device_try_release(struct iser_device *device) | |
535 | { | |
536 | mutex_lock(&ig.device_list_mutex); | |
537 | device->refcount--; | |
4f363882 | 538 | iser_info("device %p refcount %d\n", device, device->refcount); |
1cfa0a75 OG |
539 | if (!device->refcount) { |
540 | iser_free_device_ib_res(device); | |
541 | list_del(&device->ig_list); | |
542 | kfree(device); | |
543 | } | |
544 | mutex_unlock(&ig.device_list_mutex); | |
545 | } | |
546 | ||
504130c0 AN |
547 | /** |
548 | * Called with state mutex held | |
549 | **/ | |
5716af6e SG |
550 | static int iser_conn_state_comp_exch(struct iser_conn *iser_conn, |
551 | enum iser_conn_state comp, | |
552 | enum iser_conn_state exch) | |
1cfa0a75 OG |
553 | { |
554 | int ret; | |
555 | ||
5716af6e SG |
556 | ret = (iser_conn->state == comp); |
557 | if (ret) | |
558 | iser_conn->state = exch; | |
559 | ||
1cfa0a75 OG |
560 | return ret; |
561 | } | |
562 | ||
b73c3ada AN |
563 | void iser_release_work(struct work_struct *work) |
564 | { | |
5716af6e | 565 | struct iser_conn *iser_conn; |
b73c3ada | 566 | |
5716af6e | 567 | iser_conn = container_of(work, struct iser_conn, release_work); |
b73c3ada | 568 | |
c107a6c0 SG |
569 | /* Wait for conn_stop to complete */ |
570 | wait_for_completion(&iser_conn->stop_completion); | |
571 | /* Wait for IB resouces cleanup to complete */ | |
572 | wait_for_completion(&iser_conn->ib_completion); | |
b73c3ada | 573 | |
5716af6e SG |
574 | mutex_lock(&iser_conn->state_mutex); |
575 | iser_conn->state = ISER_CONN_DOWN; | |
576 | mutex_unlock(&iser_conn->state_mutex); | |
504130c0 | 577 | |
5716af6e | 578 | iser_conn_release(iser_conn); |
b73c3ada AN |
579 | } |
580 | ||
96f15198 SG |
581 | /** |
582 | * iser_free_ib_conn_res - release IB related resources | |
583 | * @iser_conn: iser connection struct | |
6606e6a2 SG |
584 | * @destroy: indicator if we need to try to release the |
585 | * iser device and memory regoins pool (only iscsi | |
586 | * shutdown and DEVICE_REMOVAL will use this). | |
96f15198 SG |
587 | * |
588 | * This routine is called with the iser state mutex held | |
589 | * so the cm_id removal is out of here. It is Safe to | |
590 | * be invoked multiple times. | |
591 | */ | |
c47a3c9e | 592 | static void iser_free_ib_conn_res(struct iser_conn *iser_conn, |
6606e6a2 | 593 | bool destroy) |
96f15198 SG |
594 | { |
595 | struct ib_conn *ib_conn = &iser_conn->ib_conn; | |
596 | struct iser_device *device = ib_conn->device; | |
597 | ||
598 | iser_info("freeing conn %p cma_id %p qp %p\n", | |
599 | iser_conn, ib_conn->cma_id, ib_conn->qp); | |
600 | ||
96f15198 | 601 | if (ib_conn->qp != NULL) { |
32f8e839 | 602 | mutex_lock(&ig.connlist_mutex); |
bf175540 | 603 | ib_conn->comp->active_qps--; |
32f8e839 | 604 | mutex_unlock(&ig.connlist_mutex); |
96f15198 SG |
605 | rdma_destroy_qp(ib_conn->cma_id); |
606 | ib_conn->qp = NULL; | |
607 | } | |
608 | ||
6606e6a2 SG |
609 | if (destroy) { |
610 | if (iser_conn->rx_descs) | |
611 | iser_free_rx_descriptors(iser_conn); | |
612 | ||
613 | if (device != NULL) { | |
614 | iser_device_try_release(device); | |
615 | ib_conn->device = NULL; | |
616 | } | |
96f15198 SG |
617 | } |
618 | } | |
619 | ||
41179e2d RD |
620 | /** |
621 | * Frees all conn objects and deallocs conn descriptor | |
622 | */ | |
5716af6e | 623 | void iser_conn_release(struct iser_conn *iser_conn) |
41179e2d | 624 | { |
a4ee3539 | 625 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
41179e2d | 626 | |
41179e2d | 627 | mutex_lock(&ig.connlist_mutex); |
5716af6e | 628 | list_del(&iser_conn->conn_list); |
41179e2d | 629 | mutex_unlock(&ig.connlist_mutex); |
504130c0 | 630 | |
5716af6e | 631 | mutex_lock(&iser_conn->state_mutex); |
9a3119e4 | 632 | /* In case we endup here without ep_disconnect being invoked. */ |
5426b171 | 633 | if (iser_conn->state != ISER_CONN_DOWN) { |
aea8f4df AN |
634 | iser_warn("iser conn %p state %d, expected state down.\n", |
635 | iser_conn, iser_conn->state); | |
9a3119e4 | 636 | iscsi_destroy_endpoint(iser_conn->ep); |
5426b171 AN |
637 | iser_conn->state = ISER_CONN_DOWN; |
638 | } | |
c47a3c9e SG |
639 | /* |
640 | * In case we never got to bind stage, we still need to | |
641 | * release IB resources (which is safe to call more than once). | |
642 | */ | |
643 | iser_free_ib_conn_res(iser_conn, true); | |
5716af6e | 644 | mutex_unlock(&iser_conn->state_mutex); |
504130c0 | 645 | |
a4ee3539 SG |
646 | if (ib_conn->cma_id != NULL) { |
647 | rdma_destroy_id(ib_conn->cma_id); | |
648 | ib_conn->cma_id = NULL; | |
5b61ff43 | 649 | } |
a4ee3539 | 650 | |
5716af6e | 651 | kfree(iser_conn); |
41179e2d RD |
652 | } |
653 | ||
1cfa0a75 OG |
654 | /** |
655 | * triggers start of the disconnect procedures and wait for them to be done | |
c47a3c9e | 656 | * Called with state mutex held |
1cfa0a75 | 657 | */ |
c47a3c9e | 658 | int iser_conn_terminate(struct iser_conn *iser_conn) |
1cfa0a75 | 659 | { |
a4ee3539 | 660 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
1cfa0a75 OG |
661 | int err = 0; |
662 | ||
c47a3c9e SG |
663 | /* terminate the iser conn only if the conn state is UP */ |
664 | if (!iser_conn_state_comp_exch(iser_conn, ISER_CONN_UP, | |
665 | ISER_CONN_TERMINATING)) | |
666 | return 0; | |
667 | ||
668 | iser_info("iser_conn %p state %d\n", iser_conn, iser_conn->state); | |
669 | ||
670 | /* suspend queuing of new iscsi commands */ | |
671 | if (iser_conn->iscsi_conn) | |
672 | iscsi_suspend_queue(iser_conn->iscsi_conn); | |
673 | ||
674 | /* | |
675 | * In case we didn't already clean up the cma_id (peer initiated | |
676 | * a disconnection), we need to Cause the CMA to change the QP | |
677 | * state to ERROR. | |
1cfa0a75 | 678 | */ |
c47a3c9e SG |
679 | if (ib_conn->cma_id) { |
680 | err = rdma_disconnect(ib_conn->cma_id); | |
681 | if (err) | |
682 | iser_err("Failed to disconnect, conn: 0x%p err %d\n", | |
683 | iser_conn, err); | |
684 | ||
4c8ba94d SW |
685 | /* block until all flush errors are consumed */ |
686 | ib_drain_sq(ib_conn->qp); | |
c47a3c9e | 687 | } |
1cfa0a75 | 688 | |
c47a3c9e | 689 | return 1; |
1cfa0a75 OG |
690 | } |
691 | ||
504130c0 AN |
692 | /** |
693 | * Called with state mutex held | |
694 | **/ | |
b73c3ada | 695 | static void iser_connect_error(struct rdma_cm_id *cma_id) |
1cfa0a75 | 696 | { |
5716af6e | 697 | struct iser_conn *iser_conn; |
b73c3ada | 698 | |
5716af6e | 699 | iser_conn = (struct iser_conn *)cma_id->context; |
c4de4663 | 700 | iser_conn->state = ISER_CONN_TERMINATING; |
1cfa0a75 OG |
701 | } |
702 | ||
df749cdc SG |
703 | static void |
704 | iser_calc_scsi_params(struct iser_conn *iser_conn, | |
705 | unsigned int max_sectors) | |
706 | { | |
707 | struct iser_device *device = iser_conn->ib_conn.device; | |
708 | unsigned short sg_tablesize, sup_sg_tablesize; | |
709 | ||
710 | sg_tablesize = DIV_ROUND_UP(max_sectors * 512, SIZE_4K); | |
711 | sup_sg_tablesize = min_t(unsigned, ISCSI_ISER_MAX_SG_TABLESIZE, | |
4a061b28 | 712 | device->ib_device->attrs.max_fast_reg_page_list_len); |
df749cdc | 713 | |
83236f01 | 714 | iser_conn->scsi_sg_tablesize = min(sg_tablesize, sup_sg_tablesize); |
df749cdc SG |
715 | } |
716 | ||
504130c0 AN |
717 | /** |
718 | * Called with state mutex held | |
719 | **/ | |
b73c3ada | 720 | static void iser_addr_handler(struct rdma_cm_id *cma_id) |
1cfa0a75 OG |
721 | { |
722 | struct iser_device *device; | |
5716af6e | 723 | struct iser_conn *iser_conn; |
a4ee3539 | 724 | struct ib_conn *ib_conn; |
1cfa0a75 OG |
725 | int ret; |
726 | ||
5716af6e SG |
727 | iser_conn = (struct iser_conn *)cma_id->context; |
728 | if (iser_conn->state != ISER_CONN_PENDING) | |
504130c0 AN |
729 | /* bailout */ |
730 | return; | |
731 | ||
a4ee3539 | 732 | ib_conn = &iser_conn->ib_conn; |
1cfa0a75 | 733 | device = iser_device_find_by_ib_device(cma_id); |
d33ed425 AR |
734 | if (!device) { |
735 | iser_err("device lookup/creation failed\n"); | |
b73c3ada AN |
736 | iser_connect_error(cma_id); |
737 | return; | |
d33ed425 AR |
738 | } |
739 | ||
a4ee3539 | 740 | ib_conn->device = device; |
1cfa0a75 | 741 | |
7f733847 AT |
742 | /* connection T10-PI support */ |
743 | if (iser_pi_enable) { | |
4a061b28 | 744 | if (!(device->ib_device->attrs.device_cap_flags & |
7f733847 AT |
745 | IB_DEVICE_SIGNATURE_HANDOVER)) { |
746 | iser_warn("T10-PI requested but not supported on %s, " | |
747 | "continue without T10-PI\n", | |
a4ee3539 SG |
748 | ib_conn->device->ib_device->name); |
749 | ib_conn->pi_support = false; | |
7f733847 | 750 | } else { |
a4ee3539 | 751 | ib_conn->pi_support = true; |
7f733847 AT |
752 | } |
753 | } | |
754 | ||
df749cdc SG |
755 | iser_calc_scsi_params(iser_conn, iser_max_sectors); |
756 | ||
1cfa0a75 OG |
757 | ret = rdma_resolve_route(cma_id, 1000); |
758 | if (ret) { | |
759 | iser_err("resolve route failed: %d\n", ret); | |
b73c3ada AN |
760 | iser_connect_error(cma_id); |
761 | return; | |
1cfa0a75 | 762 | } |
1cfa0a75 OG |
763 | } |
764 | ||
504130c0 AN |
765 | /** |
766 | * Called with state mutex held | |
767 | **/ | |
b73c3ada | 768 | static void iser_route_handler(struct rdma_cm_id *cma_id) |
1cfa0a75 OG |
769 | { |
770 | struct rdma_conn_param conn_param; | |
771 | int ret; | |
8d8399de | 772 | struct iser_cm_hdr req_hdr; |
5716af6e | 773 | struct iser_conn *iser_conn = (struct iser_conn *)cma_id->context; |
a4ee3539 SG |
774 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
775 | struct iser_device *device = ib_conn->device; | |
1cfa0a75 | 776 | |
5716af6e | 777 | if (iser_conn->state != ISER_CONN_PENDING) |
504130c0 AN |
778 | /* bailout */ |
779 | return; | |
780 | ||
a4ee3539 | 781 | ret = iser_create_ib_conn_res(ib_conn); |
1cfa0a75 OG |
782 | if (ret) |
783 | goto failure; | |
784 | ||
1cfa0a75 | 785 | memset(&conn_param, 0, sizeof conn_param); |
4a061b28 | 786 | conn_param.responder_resources = device->ib_device->attrs.max_qp_rd_atom; |
1cfa0a75 OG |
787 | conn_param.initiator_depth = 1; |
788 | conn_param.retry_count = 7; | |
789 | conn_param.rnr_retry_count = 6; | |
790 | ||
8d8399de | 791 | memset(&req_hdr, 0, sizeof(req_hdr)); |
59caaed7 JD |
792 | req_hdr.flags = ISER_ZBVA_NOT_SUP; |
793 | if (!device->remote_inv_sup) | |
794 | req_hdr.flags |= ISER_SEND_W_INV_NOT_SUP; | |
d3cf81f9 SG |
795 | conn_param.private_data = (void *)&req_hdr; |
796 | conn_param.private_data_len = sizeof(struct iser_cm_hdr); | |
8d8399de | 797 | |
1cfa0a75 OG |
798 | ret = rdma_connect(cma_id, &conn_param); |
799 | if (ret) { | |
800 | iser_err("failure connecting: %d\n", ret); | |
801 | goto failure; | |
802 | } | |
803 | ||
b73c3ada | 804 | return; |
1cfa0a75 | 805 | failure: |
b73c3ada | 806 | iser_connect_error(cma_id); |
1cfa0a75 OG |
807 | } |
808 | ||
59caaed7 JD |
809 | static void iser_connected_handler(struct rdma_cm_id *cma_id, |
810 | const void *private_data) | |
1cfa0a75 | 811 | { |
5716af6e | 812 | struct iser_conn *iser_conn; |
4f9208ad OG |
813 | struct ib_qp_attr attr; |
814 | struct ib_qp_init_attr init_attr; | |
815 | ||
5716af6e SG |
816 | iser_conn = (struct iser_conn *)cma_id->context; |
817 | if (iser_conn->state != ISER_CONN_PENDING) | |
504130c0 AN |
818 | /* bailout */ |
819 | return; | |
820 | ||
4f9208ad OG |
821 | (void)ib_query_qp(cma_id->qp, &attr, ~0, &init_attr); |
822 | iser_info("remote qpn:%x my qpn:%x\n", attr.dest_qp_num, cma_id->qp->qp_num); | |
1cfa0a75 | 823 | |
59caaed7 JD |
824 | if (private_data) { |
825 | u8 flags = *(u8 *)private_data; | |
826 | ||
827 | iser_conn->snd_w_inv = !(flags & ISER_SEND_W_INV_NOT_SUP); | |
828 | } | |
829 | ||
830 | iser_info("conn %p: negotiated %s invalidation\n", | |
831 | iser_conn, iser_conn->snd_w_inv ? "remote" : "local"); | |
832 | ||
5716af6e SG |
833 | iser_conn->state = ISER_CONN_UP; |
834 | complete(&iser_conn->up_completion); | |
1cfa0a75 OG |
835 | } |
836 | ||
b73c3ada | 837 | static void iser_disconnected_handler(struct rdma_cm_id *cma_id) |
1cfa0a75 | 838 | { |
c47a3c9e | 839 | struct iser_conn *iser_conn = (struct iser_conn *)cma_id->context; |
1cfa0a75 | 840 | |
c47a3c9e | 841 | if (iser_conn_terminate(iser_conn)) { |
5716af6e | 842 | if (iser_conn->iscsi_conn) |
c47a3c9e SG |
843 | iscsi_conn_failure(iser_conn->iscsi_conn, |
844 | ISCSI_ERR_CONN_FAILED); | |
7d9eacf9 RD |
845 | else |
846 | iser_err("iscsi_iser connection isn't bound\n"); | |
847 | } | |
c47a3c9e SG |
848 | } |
849 | ||
850 | static void iser_cleanup_handler(struct rdma_cm_id *cma_id, | |
6606e6a2 | 851 | bool destroy) |
c47a3c9e SG |
852 | { |
853 | struct iser_conn *iser_conn = (struct iser_conn *)cma_id->context; | |
1cfa0a75 | 854 | |
c47a3c9e SG |
855 | /* |
856 | * We are not guaranteed that we visited disconnected_handler | |
857 | * by now, call it here to be safe that we handle CM drep | |
858 | * and flush errors. | |
8d4aca7f | 859 | */ |
c47a3c9e | 860 | iser_disconnected_handler(cma_id); |
6606e6a2 | 861 | iser_free_ib_conn_res(iser_conn, destroy); |
c47a3c9e SG |
862 | complete(&iser_conn->ib_completion); |
863 | }; | |
1cfa0a75 OG |
864 | |
865 | static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
866 | { | |
5716af6e | 867 | struct iser_conn *iser_conn; |
c47a3c9e | 868 | int ret = 0; |
504130c0 | 869 | |
5716af6e | 870 | iser_conn = (struct iser_conn *)cma_id->context; |
871e00af SG |
871 | iser_info("%s (%d): status %d conn %p id %p\n", |
872 | rdma_event_msg(event->event), event->event, | |
873 | event->status, cma_id->context, cma_id); | |
1cfa0a75 | 874 | |
5716af6e | 875 | mutex_lock(&iser_conn->state_mutex); |
1cfa0a75 OG |
876 | switch (event->event) { |
877 | case RDMA_CM_EVENT_ADDR_RESOLVED: | |
b73c3ada | 878 | iser_addr_handler(cma_id); |
1cfa0a75 OG |
879 | break; |
880 | case RDMA_CM_EVENT_ROUTE_RESOLVED: | |
b73c3ada | 881 | iser_route_handler(cma_id); |
1cfa0a75 OG |
882 | break; |
883 | case RDMA_CM_EVENT_ESTABLISHED: | |
59caaed7 | 884 | iser_connected_handler(cma_id, event->param.conn.private_data); |
1cfa0a75 | 885 | break; |
97540bb9 SW |
886 | case RDMA_CM_EVENT_REJECTED: |
887 | iser_info("Connection rejected: %s\n", | |
888 | rdma_reject_msg(cma_id, event->status)); | |
889 | /* FALLTHROUGH */ | |
1cfa0a75 OG |
890 | case RDMA_CM_EVENT_ADDR_ERROR: |
891 | case RDMA_CM_EVENT_ROUTE_ERROR: | |
892 | case RDMA_CM_EVENT_CONNECT_ERROR: | |
893 | case RDMA_CM_EVENT_UNREACHABLE: | |
b73c3ada | 894 | iser_connect_error(cma_id); |
1cfa0a75 OG |
895 | break; |
896 | case RDMA_CM_EVENT_DISCONNECTED: | |
2f5de151 | 897 | case RDMA_CM_EVENT_ADDR_CHANGE: |
5426b171 AN |
898 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: |
899 | iser_cleanup_handler(cma_id, false); | |
1cfa0a75 | 900 | break; |
c47a3c9e SG |
901 | case RDMA_CM_EVENT_DEVICE_REMOVAL: |
902 | /* | |
903 | * we *must* destroy the device as we cannot rely | |
904 | * on iscsid to be around to initiate error handling. | |
5426b171 AN |
905 | * also if we are not in state DOWN implicitly destroy |
906 | * the cma_id. | |
c47a3c9e SG |
907 | */ |
908 | iser_cleanup_handler(cma_id, true); | |
5426b171 AN |
909 | if (iser_conn->state != ISER_CONN_DOWN) { |
910 | iser_conn->ib_conn.cma_id = NULL; | |
911 | ret = 1; | |
912 | } | |
c47a3c9e | 913 | break; |
1cfa0a75 | 914 | default: |
871e00af SG |
915 | iser_err("Unexpected RDMA CM event: %s (%d)\n", |
916 | rdma_event_msg(event->event), event->event); | |
1cfa0a75 OG |
917 | break; |
918 | } | |
5716af6e | 919 | mutex_unlock(&iser_conn->state_mutex); |
c47a3c9e SG |
920 | |
921 | return ret; | |
1cfa0a75 OG |
922 | } |
923 | ||
5716af6e | 924 | void iser_conn_init(struct iser_conn *iser_conn) |
1cfa0a75 | 925 | { |
cfeb91b3 CH |
926 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
927 | ||
5716af6e | 928 | iser_conn->state = ISER_CONN_INIT; |
5716af6e | 929 | init_completion(&iser_conn->stop_completion); |
c47a3c9e | 930 | init_completion(&iser_conn->ib_completion); |
5716af6e SG |
931 | init_completion(&iser_conn->up_completion); |
932 | INIT_LIST_HEAD(&iser_conn->conn_list); | |
5716af6e | 933 | mutex_init(&iser_conn->state_mutex); |
cfeb91b3 CH |
934 | |
935 | ib_conn->post_recv_buf_count = 0; | |
936 | ib_conn->reg_cqe.done = iser_reg_comp; | |
1cfa0a75 OG |
937 | } |
938 | ||
939 | /** | |
940 | * starts the process of connecting to the target | |
94e2bd68 | 941 | * sleeps until the connection is established or rejected |
1cfa0a75 | 942 | */ |
5716af6e | 943 | int iser_connect(struct iser_conn *iser_conn, |
96ed02d4 RD |
944 | struct sockaddr *src_addr, |
945 | struct sockaddr *dst_addr, | |
1cfa0a75 OG |
946 | int non_blocking) |
947 | { | |
a4ee3539 | 948 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
1cfa0a75 OG |
949 | int err = 0; |
950 | ||
5716af6e | 951 | mutex_lock(&iser_conn->state_mutex); |
504130c0 | 952 | |
5716af6e | 953 | sprintf(iser_conn->name, "%pISp", dst_addr); |
96ed02d4 | 954 | |
5716af6e | 955 | iser_info("connecting to: %s\n", iser_conn->name); |
1cfa0a75 OG |
956 | |
957 | /* the device is known only --after-- address resolution */ | |
a4ee3539 | 958 | ib_conn->device = NULL; |
1cfa0a75 | 959 | |
5716af6e | 960 | iser_conn->state = ISER_CONN_PENDING; |
1cfa0a75 | 961 | |
fa20105e | 962 | ib_conn->cma_id = rdma_create_id(&init_net, iser_cma_handler, |
a4ee3539 SG |
963 | (void *)iser_conn, |
964 | RDMA_PS_TCP, IB_QPT_RC); | |
965 | if (IS_ERR(ib_conn->cma_id)) { | |
966 | err = PTR_ERR(ib_conn->cma_id); | |
1cfa0a75 OG |
967 | iser_err("rdma_create_id failed: %d\n", err); |
968 | goto id_failure; | |
969 | } | |
970 | ||
a4ee3539 | 971 | err = rdma_resolve_addr(ib_conn->cma_id, src_addr, dst_addr, 1000); |
1cfa0a75 OG |
972 | if (err) { |
973 | iser_err("rdma_resolve_addr failed: %d\n", err); | |
974 | goto addr_failure; | |
975 | } | |
976 | ||
977 | if (!non_blocking) { | |
5716af6e | 978 | wait_for_completion_interruptible(&iser_conn->up_completion); |
1cfa0a75 | 979 | |
5716af6e | 980 | if (iser_conn->state != ISER_CONN_UP) { |
1cfa0a75 OG |
981 | err = -EIO; |
982 | goto connect_failure; | |
983 | } | |
984 | } | |
5716af6e | 985 | mutex_unlock(&iser_conn->state_mutex); |
1cfa0a75 OG |
986 | |
987 | mutex_lock(&ig.connlist_mutex); | |
5716af6e | 988 | list_add(&iser_conn->conn_list, &ig.connlist); |
1cfa0a75 OG |
989 | mutex_unlock(&ig.connlist_mutex); |
990 | return 0; | |
991 | ||
992 | id_failure: | |
a4ee3539 | 993 | ib_conn->cma_id = NULL; |
1cfa0a75 | 994 | addr_failure: |
5716af6e | 995 | iser_conn->state = ISER_CONN_DOWN; |
1cfa0a75 | 996 | connect_failure: |
5716af6e SG |
997 | mutex_unlock(&iser_conn->state_mutex); |
998 | iser_conn_release(iser_conn); | |
1cfa0a75 OG |
999 | return err; |
1000 | } | |
1001 | ||
5716af6e | 1002 | int iser_post_recvl(struct iser_conn *iser_conn) |
bcc60c38 | 1003 | { |
a4ee3539 | 1004 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
0f512b34 | 1005 | struct iser_login_desc *desc = &iser_conn->login_desc; |
cfeb91b3 | 1006 | struct ib_recv_wr wr, *wr_failed; |
bcc60c38 OG |
1007 | int ib_ret; |
1008 | ||
0f512b34 SG |
1009 | desc->sge.addr = desc->rsp_dma; |
1010 | desc->sge.length = ISER_RX_LOGIN_SIZE; | |
1011 | desc->sge.lkey = ib_conn->device->pd->local_dma_lkey; | |
bcc60c38 | 1012 | |
cfeb91b3 CH |
1013 | desc->cqe.done = iser_login_rsp; |
1014 | wr.wr_cqe = &desc->cqe; | |
1015 | wr.sg_list = &desc->sge; | |
1016 | wr.num_sge = 1; | |
1017 | wr.next = NULL; | |
bcc60c38 | 1018 | |
a4ee3539 | 1019 | ib_conn->post_recv_buf_count++; |
cfeb91b3 | 1020 | ib_ret = ib_post_recv(ib_conn->qp, &wr, &wr_failed); |
bcc60c38 OG |
1021 | if (ib_ret) { |
1022 | iser_err("ib_post_recv failed ret=%d\n", ib_ret); | |
a4ee3539 | 1023 | ib_conn->post_recv_buf_count--; |
bcc60c38 | 1024 | } |
cfeb91b3 | 1025 | |
bcc60c38 OG |
1026 | return ib_ret; |
1027 | } | |
1028 | ||
5716af6e | 1029 | int iser_post_recvm(struct iser_conn *iser_conn, int count) |
bcc60c38 | 1030 | { |
a4ee3539 | 1031 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
5716af6e | 1032 | unsigned int my_rx_head = iser_conn->rx_desc_head; |
bcc60c38 | 1033 | struct iser_rx_desc *rx_desc; |
cfeb91b3 CH |
1034 | struct ib_recv_wr *wr, *wr_failed; |
1035 | int i, ib_ret; | |
bcc60c38 | 1036 | |
cfeb91b3 CH |
1037 | for (wr = ib_conn->rx_wr, i = 0; i < count; i++, wr++) { |
1038 | rx_desc = &iser_conn->rx_descs[my_rx_head]; | |
1039 | rx_desc->cqe.done = iser_task_rsp; | |
1040 | wr->wr_cqe = &rx_desc->cqe; | |
1041 | wr->sg_list = &rx_desc->rx_sg; | |
1042 | wr->num_sge = 1; | |
1043 | wr->next = wr + 1; | |
5716af6e | 1044 | my_rx_head = (my_rx_head + 1) & iser_conn->qp_max_recv_dtos_mask; |
bcc60c38 OG |
1045 | } |
1046 | ||
cfeb91b3 CH |
1047 | wr--; |
1048 | wr->next = NULL; /* mark end of work requests list */ | |
bcc60c38 | 1049 | |
a4ee3539 | 1050 | ib_conn->post_recv_buf_count += count; |
cfeb91b3 | 1051 | ib_ret = ib_post_recv(ib_conn->qp, ib_conn->rx_wr, &wr_failed); |
bcc60c38 OG |
1052 | if (ib_ret) { |
1053 | iser_err("ib_post_recv failed ret=%d\n", ib_ret); | |
a4ee3539 | 1054 | ib_conn->post_recv_buf_count -= count; |
bcc60c38 | 1055 | } else |
5716af6e | 1056 | iser_conn->rx_desc_head = my_rx_head; |
cfeb91b3 | 1057 | |
bcc60c38 OG |
1058 | return ib_ret; |
1059 | } | |
1060 | ||
1061 | ||
1cfa0a75 OG |
1062 | /** |
1063 | * iser_start_send - Initiate a Send DTO operation | |
1064 | * | |
1065 | * returns 0 on success, -1 on failure | |
1066 | */ | |
6df5a128 SG |
1067 | int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, |
1068 | bool signal) | |
1cfa0a75 | 1069 | { |
7332bed0 SG |
1070 | struct ib_send_wr *bad_wr, *wr = iser_tx_next_wr(tx_desc); |
1071 | int ib_ret; | |
1cfa0a75 | 1072 | |
a4ee3539 | 1073 | ib_dma_sync_single_for_device(ib_conn->device->ib_device, |
5716af6e SG |
1074 | tx_desc->dma_addr, ISER_HEADERS_LEN, |
1075 | DMA_TO_DEVICE); | |
1cfa0a75 | 1076 | |
7332bed0 | 1077 | wr->next = NULL; |
cfeb91b3 | 1078 | wr->wr_cqe = &tx_desc->cqe; |
7332bed0 SG |
1079 | wr->sg_list = tx_desc->tx_sg; |
1080 | wr->num_sge = tx_desc->num_sge; | |
1081 | wr->opcode = IB_WR_SEND; | |
1082 | wr->send_flags = signal ? IB_SEND_SIGNALED : 0; | |
1cfa0a75 | 1083 | |
e622f2f4 | 1084 | ib_ret = ib_post_send(ib_conn->qp, &tx_desc->wrs[0].send, &bad_wr); |
ff3dd52d | 1085 | if (ib_ret) |
7332bed0 SG |
1086 | iser_err("ib_post_send failed, ret:%d opcode:%d\n", |
1087 | ib_ret, bad_wr->opcode); | |
ff3dd52d | 1088 | |
f19624aa | 1089 | return ib_ret; |
1cfa0a75 OG |
1090 | } |
1091 | ||
0a7a08ad SG |
1092 | u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, |
1093 | enum iser_data_dir cmd_dir, sector_t *sector) | |
1094 | { | |
b130eded | 1095 | struct iser_mem_reg *reg = &iser_task->rdma_reg[cmd_dir]; |
5190cc26 | 1096 | struct iser_fr_desc *desc = reg->mem_h; |
0a7a08ad SG |
1097 | unsigned long sector_size = iser_task->sc->device->sector_size; |
1098 | struct ib_mr_status mr_status; | |
1099 | int ret; | |
1100 | ||
d711d81d SG |
1101 | if (desc && desc->pi_ctx->sig_protected) { |
1102 | desc->pi_ctx->sig_protected = 0; | |
0a7a08ad SG |
1103 | ret = ib_check_mr_status(desc->pi_ctx->sig_mr, |
1104 | IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1105 | if (ret) { | |
1106 | pr_err("ib_check_mr_status failed, ret %d\n", ret); | |
1107 | goto err; | |
1108 | } | |
1109 | ||
1110 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1111 | sector_t sector_off = mr_status.sig_err.sig_err_offset; | |
1112 | ||
2c63d107 | 1113 | sector_div(sector_off, sector_size + 8); |
0a7a08ad SG |
1114 | *sector = scsi_get_lba(iser_task->sc) + sector_off; |
1115 | ||
39c978cd | 1116 | pr_err("PI error found type %d at sector %llx " |
0a7a08ad | 1117 | "expected %x vs actual %x\n", |
39c978cd RD |
1118 | mr_status.sig_err.err_type, |
1119 | (unsigned long long)*sector, | |
0a7a08ad SG |
1120 | mr_status.sig_err.expected, |
1121 | mr_status.sig_err.actual); | |
1122 | ||
1123 | switch (mr_status.sig_err.err_type) { | |
1124 | case IB_SIG_BAD_GUARD: | |
1125 | return 0x1; | |
1126 | case IB_SIG_BAD_REFTAG: | |
1127 | return 0x3; | |
1128 | case IB_SIG_BAD_APPTAG: | |
1129 | return 0x2; | |
1130 | } | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | return 0; | |
1135 | err: | |
1136 | /* Not alot we can do here, return ambiguous guard error */ | |
1137 | return 0x1; | |
1138 | } | |
cfeb91b3 CH |
1139 | |
1140 | void iser_err_comp(struct ib_wc *wc, const char *type) | |
1141 | { | |
1142 | if (wc->status != IB_WC_WR_FLUSH_ERR) { | |
1143 | struct iser_conn *iser_conn = to_iser_conn(wc->qp->qp_context); | |
1144 | ||
1145 | iser_err("%s failure: %s (%d) vend_err %x\n", type, | |
1146 | ib_wc_status_msg(wc->status), wc->status, | |
1147 | wc->vendor_err); | |
1148 | ||
1149 | if (iser_conn->iscsi_conn) | |
1150 | iscsi_conn_failure(iser_conn->iscsi_conn, | |
1151 | ISCSI_ERR_CONN_FAILED); | |
1152 | } else { | |
1153 | iser_dbg("%s failure: %s (%d)\n", type, | |
1154 | ib_wc_status_msg(wc->status), wc->status); | |
1155 | } | |
1156 | } |