Commit | Line | Data |
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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, | |
6c854111 | 58 | dev_name(&event->device->dev), event->element.port_num); |
2110f9bf OG |
59 | } |
60 | ||
134a42a6 | 61 | /* |
1cfa0a75 OG |
62 | * iser_create_device_ib_res - creates Protection Domain (PD), Completion |
63 | * Queue (CQ), DMA Memory Region (DMA MR) with the device associated with | |
134a42a6 | 64 | * the adaptor. |
1cfa0a75 | 65 | * |
134a42a6 | 66 | * Return: 0 on success, -1 on failure |
1cfa0a75 OG |
67 | */ |
68 | static int iser_create_device_ib_res(struct iser_device *device) | |
69 | { | |
4a061b28 | 70 | struct ib_device *ib_dev = device->ib_device; |
5a33a669 | 71 | |
1fc43132 IR |
72 | if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)) { |
73 | iser_err("IB device does not support memory registrations\n"); | |
74 | return -1; | |
75 | } | |
b4e155ff | 76 | |
8e61212d CH |
77 | device->pd = ib_alloc_pd(ib_dev, |
78 | iser_always_reg ? 0 : IB_PD_UNSAFE_GLOBAL_RKEY); | |
1cfa0a75 OG |
79 | if (IS_ERR(device->pd)) |
80 | goto pd_err; | |
81 | ||
882f3b3b DL |
82 | INIT_IB_EVENT_HANDLER(&device->event_handler, ib_dev, |
83 | iser_event_handler); | |
dcc9881e | 84 | ib_register_event_handler(&device->event_handler); |
1cfa0a75 OG |
85 | return 0; |
86 | ||
1cfa0a75 OG |
87 | pd_err: |
88 | iser_err("failed to allocate an IB resource\n"); | |
89 | return -1; | |
90 | } | |
91 | ||
134a42a6 | 92 | /* |
38dc732f | 93 | * iser_free_device_ib_res - destroy/dealloc/dereg the DMA MR, |
134a42a6 | 94 | * CQ and PD created with the device associated with the adaptor. |
1cfa0a75 OG |
95 | */ |
96 | static void iser_free_device_ib_res(struct iser_device *device) | |
97 | { | |
dcc9881e | 98 | ib_unregister_event_handler(&device->event_handler); |
7dd78647 | 99 | ib_dealloc_pd(device->pd); |
1cfa0a75 | 100 | |
1cfa0a75 OG |
101 | device->pd = NULL; |
102 | } | |
103 | ||
b76a4399 IR |
104 | static struct iser_fr_desc * |
105 | iser_create_fastreg_desc(struct iser_device *device, | |
106 | struct ib_pd *pd, | |
107 | bool pi_enable, | |
108 | unsigned int size) | |
d711d81d | 109 | { |
b76a4399 | 110 | struct iser_fr_desc *desc; |
318d311e SG |
111 | struct ib_device *ib_dev = device->ib_device; |
112 | enum ib_mr_type mr_type; | |
d711d81d SG |
113 | int ret; |
114 | ||
b76a4399 IR |
115 | desc = kzalloc(sizeof(*desc), GFP_KERNEL); |
116 | if (!desc) | |
117 | return ERR_PTR(-ENOMEM); | |
118 | ||
318d311e SG |
119 | if (ib_dev->attrs.device_cap_flags & IB_DEVICE_SG_GAPS_REG) |
120 | mr_type = IB_MR_TYPE_SG_GAPS; | |
121 | else | |
122 | mr_type = IB_MR_TYPE_MEM_REG; | |
123 | ||
b76a4399 IR |
124 | desc->rsc.mr = ib_alloc_mr(pd, mr_type, size); |
125 | if (IS_ERR(desc->rsc.mr)) { | |
126 | ret = PTR_ERR(desc->rsc.mr); | |
d711d81d | 127 | iser_err("Failed to allocate ib_fast_reg_mr err=%d\n", ret); |
b76a4399 | 128 | goto err_alloc_mr; |
4dec2a27 | 129 | } |
4dec2a27 | 130 | |
b76a4399 IR |
131 | if (pi_enable) { |
132 | desc->rsc.sig_mr = ib_alloc_mr_integrity(pd, size, size); | |
133 | if (IS_ERR(desc->rsc.sig_mr)) { | |
134 | ret = PTR_ERR(desc->rsc.sig_mr); | |
135 | iser_err("Failed to allocate sig_mr err=%d\n", ret); | |
136 | goto err_alloc_mr_integrity; | |
137 | } | |
4dec2a27 | 138 | } |
b76a4399 | 139 | desc->rsc.mr_valid = 0; |
4dec2a27 | 140 | |
b76a4399 | 141 | return desc; |
4dec2a27 | 142 | |
b76a4399 IR |
143 | err_alloc_mr_integrity: |
144 | ib_dereg_mr(desc->rsc.mr); | |
145 | err_alloc_mr: | |
146 | kfree(desc); | |
4dec2a27 | 147 | |
b76a4399 | 148 | return ERR_PTR(ret); |
4dec2a27 SG |
149 | } |
150 | ||
b76a4399 | 151 | static void iser_destroy_fastreg_desc(struct iser_fr_desc *desc) |
4dec2a27 | 152 | { |
b76a4399 | 153 | struct iser_reg_resources *res = &desc->rsc; |
310b347c | 154 | |
b76a4399 IR |
155 | ib_dereg_mr(res->mr); |
156 | if (res->sig_mr) { | |
157 | ib_dereg_mr(res->sig_mr); | |
158 | res->sig_mr = NULL; | |
6b5a8fb0 | 159 | } |
eb6ea8c3 | 160 | kfree(desc); |
310b347c SG |
161 | } |
162 | ||
5587856c | 163 | /** |
48afbff6 | 164 | * iser_alloc_fastreg_pool - Creates pool of fast_reg descriptors |
5587856c | 165 | * for fast registration work requests. |
134a42a6 | 166 | * @ib_conn: connection RDMA resources |
167 | * @cmds_max: max number of SCSI commands for this connection | |
168 | * @size: max number of pages per map request | |
169 | * | |
170 | * Return: 0 on success, or errno code on failure | |
5587856c | 171 | */ |
f8db651d SG |
172 | int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, |
173 | unsigned cmds_max, | |
174 | unsigned int size) | |
5587856c | 175 | { |
a4ee3539 | 176 | struct iser_device *device = ib_conn->device; |
385ad87d | 177 | struct iser_fr_pool *fr_pool = &ib_conn->fr_pool; |
5190cc26 | 178 | struct iser_fr_desc *desc; |
5587856c SG |
179 | int i, ret; |
180 | ||
2b3bf958 | 181 | INIT_LIST_HEAD(&fr_pool->list); |
ea174c95 | 182 | INIT_LIST_HEAD(&fr_pool->all_list); |
385ad87d | 183 | spin_lock_init(&fr_pool->lock); |
2b3bf958 | 184 | fr_pool->size = 0; |
5587856c | 185 | for (i = 0; i < cmds_max; i++) { |
318d311e | 186 | desc = iser_create_fastreg_desc(device, device->pd, |
f8db651d | 187 | ib_conn->pi_support, size); |
eb6ea8c3 SG |
188 | if (IS_ERR(desc)) { |
189 | ret = PTR_ERR(desc); | |
310b347c | 190 | goto err; |
5587856c SG |
191 | } |
192 | ||
2b3bf958 | 193 | list_add_tail(&desc->list, &fr_pool->list); |
ea174c95 | 194 | list_add_tail(&desc->all_list, &fr_pool->all_list); |
2b3bf958 | 195 | fr_pool->size++; |
5587856c SG |
196 | } |
197 | ||
198 | return 0; | |
27ae2d1e | 199 | |
5587856c | 200 | err: |
a4ee3539 | 201 | iser_free_fastreg_pool(ib_conn); |
5587856c SG |
202 | return ret; |
203 | } | |
204 | ||
205 | /** | |
7306b8fa | 206 | * iser_free_fastreg_pool - releases the pool of fast_reg descriptors |
134a42a6 | 207 | * @ib_conn: connection RDMA resources |
5587856c | 208 | */ |
a4ee3539 | 209 | void iser_free_fastreg_pool(struct ib_conn *ib_conn) |
5587856c | 210 | { |
385ad87d | 211 | struct iser_fr_pool *fr_pool = &ib_conn->fr_pool; |
5190cc26 | 212 | struct iser_fr_desc *desc, *tmp; |
5587856c SG |
213 | int i = 0; |
214 | ||
ea174c95 | 215 | if (list_empty(&fr_pool->all_list)) |
5587856c SG |
216 | return; |
217 | ||
a4ee3539 | 218 | iser_info("freeing conn %p fr pool\n", ib_conn); |
5587856c | 219 | |
ea174c95 SG |
220 | list_for_each_entry_safe(desc, tmp, &fr_pool->all_list, all_list) { |
221 | list_del(&desc->all_list); | |
b76a4399 | 222 | iser_destroy_fastreg_desc(desc); |
5587856c SG |
223 | ++i; |
224 | } | |
225 | ||
2b3bf958 | 226 | if (i < fr_pool->size) |
5587856c | 227 | iser_warn("pool still has %d regions registered\n", |
2b3bf958 | 228 | fr_pool->size - i); |
5587856c SG |
229 | } |
230 | ||
134a42a6 | 231 | /* |
986db0d6 SP |
232 | * iser_create_ib_conn_res - Queue-Pair (QP) |
233 | * | |
134a42a6 | 234 | * Return: 0 on success, -1 on failure |
986db0d6 | 235 | */ |
a4ee3539 | 236 | static int iser_create_ib_conn_res(struct ib_conn *ib_conn) |
986db0d6 | 237 | { |
7edc5a99 | 238 | struct iser_conn *iser_conn = to_iser_conn(ib_conn); |
986db0d6 | 239 | struct iser_device *device; |
4a061b28 | 240 | struct ib_device *ib_dev; |
986db0d6 SP |
241 | struct ib_qp_init_attr init_attr; |
242 | int ret = -ENOMEM; | |
d56a7852 | 243 | unsigned int max_send_wr, cq_size; |
986db0d6 | 244 | |
a4ee3539 | 245 | BUG_ON(ib_conn->device == NULL); |
986db0d6 | 246 | |
a4ee3539 | 247 | device = ib_conn->device; |
4a061b28 | 248 | ib_dev = device->ib_device; |
1cfa0a75 | 249 | |
d56a7852 YF |
250 | if (ib_conn->pi_support) |
251 | max_send_wr = ISER_QP_SIG_MAX_REQ_DTOS + 1; | |
252 | else | |
253 | max_send_wr = ISER_QP_MAX_REQ_DTOS + 1; | |
254 | max_send_wr = min_t(unsigned int, max_send_wr, | |
255 | (unsigned int)ib_dev->attrs.max_qp_wr); | |
256 | ||
257 | cq_size = max_send_wr + ISER_QP_MAX_RECV_DTOS; | |
258 | ib_conn->cq = ib_cq_pool_get(ib_dev, cq_size, -1, IB_POLL_SOFTIRQ); | |
259 | if (IS_ERR(ib_conn->cq)) { | |
260 | ret = PTR_ERR(ib_conn->cq); | |
261 | goto cq_err; | |
bf175540 | 262 | } |
d56a7852 YF |
263 | ib_conn->cq_size = cq_size; |
264 | ||
265 | memset(&init_attr, 0, sizeof(init_attr)); | |
5a33a669 | 266 | |
1cfa0a75 | 267 | init_attr.event_handler = iser_qp_event_callback; |
a4ee3539 | 268 | init_attr.qp_context = (void *)ib_conn; |
d56a7852 YF |
269 | init_attr.send_cq = ib_conn->cq; |
270 | init_attr.recv_cq = ib_conn->cq; | |
1cfa0a75 | 271 | init_attr.cap.max_recv_wr = ISER_QP_MAX_RECV_DTOS; |
f19624aa | 272 | init_attr.cap.max_send_sge = 2; |
bcc60c38 | 273 | init_attr.cap.max_recv_sge = 1; |
1cfa0a75 OG |
274 | init_attr.sq_sig_type = IB_SIGNAL_REQ_WR; |
275 | init_attr.qp_type = IB_QPT_RC; | |
d56a7852 YF |
276 | init_attr.cap.max_send_wr = max_send_wr; |
277 | if (ib_conn->pi_support) | |
c0a6cbb9 | 278 | init_attr.create_flags |= IB_QP_CREATE_INTEGRITY_EN; |
d56a7852 | 279 | iser_conn->max_cmds = ISER_GET_MAX_XMIT_CMDS(max_send_wr - 1); |
1cfa0a75 | 280 | |
a4ee3539 | 281 | ret = rdma_create_qp(ib_conn->cma_id, device->pd, &init_attr); |
1cfa0a75 | 282 | if (ret) |
9fda1ac5 | 283 | goto out_err; |
1cfa0a75 | 284 | |
a4ee3539 | 285 | ib_conn->qp = ib_conn->cma_id->qp; |
d56a7852 | 286 | iser_info("setting conn %p cma_id %p qp %p max_send_wr %d\n", |
a4ee3539 | 287 | ib_conn, ib_conn->cma_id, |
d56a7852 | 288 | ib_conn->cma_id->qp, max_send_wr); |
1cfa0a75 OG |
289 | return ret; |
290 | ||
9fda1ac5 | 291 | out_err: |
d56a7852 YF |
292 | ib_cq_pool_put(ib_conn->cq, ib_conn->cq_size); |
293 | cq_err: | |
1cfa0a75 | 294 | iser_err("unable to alloc mem or create resource, err %d\n", ret); |
93acb7bb | 295 | |
1cfa0a75 OG |
296 | return ret; |
297 | } | |
298 | ||
134a42a6 | 299 | /* |
1cfa0a75 OG |
300 | * based on the resolved device node GUID see if there already allocated |
301 | * device for this device. If there's no such, create one. | |
302 | */ | |
303 | static | |
304 | struct iser_device *iser_device_find_by_ib_device(struct rdma_cm_id *cma_id) | |
305 | { | |
9a378270 | 306 | struct iser_device *device; |
1cfa0a75 OG |
307 | |
308 | mutex_lock(&ig.device_list_mutex); | |
309 | ||
9a378270 | 310 | list_for_each_entry(device, &ig.device_list, ig_list) |
1cfa0a75 OG |
311 | /* find if there's a match using the node GUID */ |
312 | if (device->ib_device->node_guid == cma_id->device->node_guid) | |
d33ed425 | 313 | goto inc_refcnt; |
9a378270 AR |
314 | |
315 | device = kzalloc(sizeof *device, GFP_KERNEL); | |
316 | if (device == NULL) | |
317 | goto out; | |
318 | ||
319 | /* assign this device to the device */ | |
320 | device->ib_device = cma_id->device; | |
321 | /* init the device and link it into ig device list */ | |
322 | if (iser_create_device_ib_res(device)) { | |
323 | kfree(device); | |
324 | device = NULL; | |
325 | goto out; | |
1cfa0a75 | 326 | } |
9a378270 AR |
327 | list_add(&device->ig_list, &ig.device_list); |
328 | ||
d33ed425 | 329 | inc_refcnt: |
1cfa0a75 | 330 | device->refcount++; |
d33ed425 | 331 | out: |
1cfa0a75 OG |
332 | mutex_unlock(&ig.device_list_mutex); |
333 | return device; | |
334 | } | |
335 | ||
336 | /* if there's no demand for this device, release it */ | |
337 | static void iser_device_try_release(struct iser_device *device) | |
338 | { | |
339 | mutex_lock(&ig.device_list_mutex); | |
340 | device->refcount--; | |
4f363882 | 341 | iser_info("device %p refcount %d\n", device, device->refcount); |
1cfa0a75 OG |
342 | if (!device->refcount) { |
343 | iser_free_device_ib_res(device); | |
344 | list_del(&device->ig_list); | |
345 | kfree(device); | |
346 | } | |
347 | mutex_unlock(&ig.device_list_mutex); | |
348 | } | |
349 | ||
134a42a6 | 350 | /* |
504130c0 | 351 | * Called with state mutex held |
134a42a6 | 352 | */ |
5716af6e SG |
353 | static int iser_conn_state_comp_exch(struct iser_conn *iser_conn, |
354 | enum iser_conn_state comp, | |
355 | enum iser_conn_state exch) | |
1cfa0a75 OG |
356 | { |
357 | int ret; | |
358 | ||
5716af6e SG |
359 | ret = (iser_conn->state == comp); |
360 | if (ret) | |
361 | iser_conn->state = exch; | |
362 | ||
1cfa0a75 OG |
363 | return ret; |
364 | } | |
365 | ||
b73c3ada AN |
366 | void iser_release_work(struct work_struct *work) |
367 | { | |
5716af6e | 368 | struct iser_conn *iser_conn; |
b73c3ada | 369 | |
5716af6e | 370 | iser_conn = container_of(work, struct iser_conn, release_work); |
b73c3ada | 371 | |
c107a6c0 SG |
372 | /* Wait for conn_stop to complete */ |
373 | wait_for_completion(&iser_conn->stop_completion); | |
374 | /* Wait for IB resouces cleanup to complete */ | |
375 | wait_for_completion(&iser_conn->ib_completion); | |
b73c3ada | 376 | |
5716af6e SG |
377 | mutex_lock(&iser_conn->state_mutex); |
378 | iser_conn->state = ISER_CONN_DOWN; | |
379 | mutex_unlock(&iser_conn->state_mutex); | |
504130c0 | 380 | |
5716af6e | 381 | iser_conn_release(iser_conn); |
b73c3ada AN |
382 | } |
383 | ||
96f15198 SG |
384 | /** |
385 | * iser_free_ib_conn_res - release IB related resources | |
386 | * @iser_conn: iser connection struct | |
6606e6a2 SG |
387 | * @destroy: indicator if we need to try to release the |
388 | * iser device and memory regoins pool (only iscsi | |
389 | * shutdown and DEVICE_REMOVAL will use this). | |
96f15198 SG |
390 | * |
391 | * This routine is called with the iser state mutex held | |
392 | * so the cm_id removal is out of here. It is Safe to | |
393 | * be invoked multiple times. | |
394 | */ | |
c47a3c9e | 395 | static void iser_free_ib_conn_res(struct iser_conn *iser_conn, |
6606e6a2 | 396 | bool destroy) |
96f15198 SG |
397 | { |
398 | struct ib_conn *ib_conn = &iser_conn->ib_conn; | |
399 | struct iser_device *device = ib_conn->device; | |
400 | ||
401 | iser_info("freeing conn %p cma_id %p qp %p\n", | |
402 | iser_conn, ib_conn->cma_id, ib_conn->qp); | |
403 | ||
96f15198 | 404 | if (ib_conn->qp != NULL) { |
96f15198 | 405 | rdma_destroy_qp(ib_conn->cma_id); |
d56a7852 | 406 | ib_cq_pool_put(ib_conn->cq, ib_conn->cq_size); |
96f15198 SG |
407 | ib_conn->qp = NULL; |
408 | } | |
409 | ||
6606e6a2 SG |
410 | if (destroy) { |
411 | if (iser_conn->rx_descs) | |
412 | iser_free_rx_descriptors(iser_conn); | |
413 | ||
414 | if (device != NULL) { | |
415 | iser_device_try_release(device); | |
416 | ib_conn->device = NULL; | |
417 | } | |
96f15198 SG |
418 | } |
419 | } | |
420 | ||
41179e2d | 421 | /** |
134a42a6 | 422 | * iser_conn_release - Frees all conn objects and deallocs conn descriptor |
423 | * @iser_conn: iSER connection context | |
41179e2d | 424 | */ |
5716af6e | 425 | void iser_conn_release(struct iser_conn *iser_conn) |
41179e2d | 426 | { |
a4ee3539 | 427 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
41179e2d | 428 | |
41179e2d | 429 | mutex_lock(&ig.connlist_mutex); |
5716af6e | 430 | list_del(&iser_conn->conn_list); |
41179e2d | 431 | mutex_unlock(&ig.connlist_mutex); |
504130c0 | 432 | |
5716af6e | 433 | mutex_lock(&iser_conn->state_mutex); |
9a3119e4 | 434 | /* In case we endup here without ep_disconnect being invoked. */ |
5426b171 | 435 | if (iser_conn->state != ISER_CONN_DOWN) { |
aea8f4df AN |
436 | iser_warn("iser conn %p state %d, expected state down.\n", |
437 | iser_conn, iser_conn->state); | |
9a3119e4 | 438 | iscsi_destroy_endpoint(iser_conn->ep); |
5426b171 AN |
439 | iser_conn->state = ISER_CONN_DOWN; |
440 | } | |
c47a3c9e SG |
441 | /* |
442 | * In case we never got to bind stage, we still need to | |
443 | * release IB resources (which is safe to call more than once). | |
444 | */ | |
445 | iser_free_ib_conn_res(iser_conn, true); | |
5716af6e | 446 | mutex_unlock(&iser_conn->state_mutex); |
504130c0 | 447 | |
a4ee3539 SG |
448 | if (ib_conn->cma_id != NULL) { |
449 | rdma_destroy_id(ib_conn->cma_id); | |
450 | ib_conn->cma_id = NULL; | |
5b61ff43 | 451 | } |
a4ee3539 | 452 | |
5716af6e | 453 | kfree(iser_conn); |
41179e2d RD |
454 | } |
455 | ||
1cfa0a75 | 456 | /** |
134a42a6 | 457 | * iser_conn_terminate - triggers start of the disconnect procedures and |
458 | * waits for them to be done | |
459 | * @iser_conn: iSER connection context | |
460 | * | |
c47a3c9e | 461 | * Called with state mutex held |
1cfa0a75 | 462 | */ |
c47a3c9e | 463 | int iser_conn_terminate(struct iser_conn *iser_conn) |
1cfa0a75 | 464 | { |
a4ee3539 | 465 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
1cfa0a75 OG |
466 | int err = 0; |
467 | ||
c47a3c9e SG |
468 | /* terminate the iser conn only if the conn state is UP */ |
469 | if (!iser_conn_state_comp_exch(iser_conn, ISER_CONN_UP, | |
470 | ISER_CONN_TERMINATING)) | |
471 | return 0; | |
472 | ||
473 | iser_info("iser_conn %p state %d\n", iser_conn, iser_conn->state); | |
474 | ||
475 | /* suspend queuing of new iscsi commands */ | |
476 | if (iser_conn->iscsi_conn) | |
477 | iscsi_suspend_queue(iser_conn->iscsi_conn); | |
478 | ||
479 | /* | |
480 | * In case we didn't already clean up the cma_id (peer initiated | |
481 | * a disconnection), we need to Cause the CMA to change the QP | |
482 | * state to ERROR. | |
1cfa0a75 | 483 | */ |
c47a3c9e SG |
484 | if (ib_conn->cma_id) { |
485 | err = rdma_disconnect(ib_conn->cma_id); | |
486 | if (err) | |
487 | iser_err("Failed to disconnect, conn: 0x%p err %d\n", | |
488 | iser_conn, err); | |
489 | ||
4c8ba94d SW |
490 | /* block until all flush errors are consumed */ |
491 | ib_drain_sq(ib_conn->qp); | |
c47a3c9e | 492 | } |
1cfa0a75 | 493 | |
c47a3c9e | 494 | return 1; |
1cfa0a75 OG |
495 | } |
496 | ||
134a42a6 | 497 | /* |
504130c0 | 498 | * Called with state mutex held |
134a42a6 | 499 | */ |
b73c3ada | 500 | static void iser_connect_error(struct rdma_cm_id *cma_id) |
1cfa0a75 | 501 | { |
5716af6e | 502 | struct iser_conn *iser_conn; |
b73c3ada | 503 | |
5716af6e | 504 | iser_conn = (struct iser_conn *)cma_id->context; |
c4de4663 | 505 | iser_conn->state = ISER_CONN_TERMINATING; |
1cfa0a75 OG |
506 | } |
507 | ||
df749cdc SG |
508 | static void |
509 | iser_calc_scsi_params(struct iser_conn *iser_conn, | |
510 | unsigned int max_sectors) | |
511 | { | |
512 | struct iser_device *device = iser_conn->ib_conn.device; | |
434dda42 | 513 | struct ib_device_attr *attr = &device->ib_device->attrs; |
df749cdc | 514 | unsigned short sg_tablesize, sup_sg_tablesize; |
434dda42 | 515 | unsigned short reserved_mr_pages; |
b76a4399 | 516 | u32 max_num_sg; |
434dda42 SG |
517 | |
518 | /* | |
1fc43132 IR |
519 | * FRs without SG_GAPS can only map up to a (device) page per entry, |
520 | * but if the first entry is misaligned we'll end up using two entries | |
521 | * (head and tail) for a single page worth data, so one additional | |
522 | * entry is required. | |
434dda42 | 523 | */ |
1fc43132 | 524 | if (attr->device_cap_flags & IB_DEVICE_SG_GAPS_REG) |
434dda42 SG |
525 | reserved_mr_pages = 0; |
526 | else | |
527 | reserved_mr_pages = 1; | |
df749cdc | 528 | |
b76a4399 IR |
529 | if (iser_conn->ib_conn.pi_support) |
530 | max_num_sg = attr->max_pi_fast_reg_page_list_len; | |
531 | else | |
532 | max_num_sg = attr->max_fast_reg_page_list_len; | |
533 | ||
6eeff06d | 534 | sg_tablesize = DIV_ROUND_UP(max_sectors * SECTOR_SIZE, SZ_4K); |
1fc43132 IR |
535 | sup_sg_tablesize = min_t(uint, ISCSI_ISER_MAX_SG_TABLESIZE, |
536 | max_num_sg - reserved_mr_pages); | |
83236f01 | 537 | iser_conn->scsi_sg_tablesize = min(sg_tablesize, sup_sg_tablesize); |
434dda42 SG |
538 | iser_conn->pages_per_mr = |
539 | iser_conn->scsi_sg_tablesize + reserved_mr_pages; | |
df749cdc SG |
540 | } |
541 | ||
134a42a6 | 542 | /* |
504130c0 | 543 | * Called with state mutex held |
134a42a6 | 544 | */ |
b73c3ada | 545 | static void iser_addr_handler(struct rdma_cm_id *cma_id) |
1cfa0a75 OG |
546 | { |
547 | struct iser_device *device; | |
5716af6e | 548 | struct iser_conn *iser_conn; |
a4ee3539 | 549 | struct ib_conn *ib_conn; |
1cfa0a75 OG |
550 | int ret; |
551 | ||
5716af6e SG |
552 | iser_conn = (struct iser_conn *)cma_id->context; |
553 | if (iser_conn->state != ISER_CONN_PENDING) | |
504130c0 AN |
554 | /* bailout */ |
555 | return; | |
556 | ||
a4ee3539 | 557 | ib_conn = &iser_conn->ib_conn; |
1cfa0a75 | 558 | device = iser_device_find_by_ib_device(cma_id); |
d33ed425 AR |
559 | if (!device) { |
560 | iser_err("device lookup/creation failed\n"); | |
b73c3ada AN |
561 | iser_connect_error(cma_id); |
562 | return; | |
d33ed425 AR |
563 | } |
564 | ||
a4ee3539 | 565 | ib_conn->device = device; |
1cfa0a75 | 566 | |
7f733847 AT |
567 | /* connection T10-PI support */ |
568 | if (iser_pi_enable) { | |
4a061b28 | 569 | if (!(device->ib_device->attrs.device_cap_flags & |
c0a6cbb9 | 570 | IB_DEVICE_INTEGRITY_HANDOVER)) { |
7f733847 AT |
571 | iser_warn("T10-PI requested but not supported on %s, " |
572 | "continue without T10-PI\n", | |
6c854111 | 573 | dev_name(&ib_conn->device->ib_device->dev)); |
a4ee3539 | 574 | ib_conn->pi_support = false; |
7f733847 | 575 | } else { |
a4ee3539 | 576 | ib_conn->pi_support = true; |
7f733847 AT |
577 | } |
578 | } | |
579 | ||
df749cdc SG |
580 | iser_calc_scsi_params(iser_conn, iser_max_sectors); |
581 | ||
1cfa0a75 OG |
582 | ret = rdma_resolve_route(cma_id, 1000); |
583 | if (ret) { | |
584 | iser_err("resolve route failed: %d\n", ret); | |
b73c3ada AN |
585 | iser_connect_error(cma_id); |
586 | return; | |
1cfa0a75 | 587 | } |
1cfa0a75 OG |
588 | } |
589 | ||
134a42a6 | 590 | /* |
504130c0 | 591 | * Called with state mutex held |
134a42a6 | 592 | */ |
b73c3ada | 593 | static void iser_route_handler(struct rdma_cm_id *cma_id) |
1cfa0a75 OG |
594 | { |
595 | struct rdma_conn_param conn_param; | |
596 | int ret; | |
8d8399de | 597 | struct iser_cm_hdr req_hdr; |
5716af6e | 598 | struct iser_conn *iser_conn = (struct iser_conn *)cma_id->context; |
a4ee3539 | 599 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
1fc43132 | 600 | struct ib_device *ib_dev = ib_conn->device->ib_device; |
1cfa0a75 | 601 | |
5716af6e | 602 | if (iser_conn->state != ISER_CONN_PENDING) |
504130c0 AN |
603 | /* bailout */ |
604 | return; | |
605 | ||
a4ee3539 | 606 | ret = iser_create_ib_conn_res(ib_conn); |
1cfa0a75 OG |
607 | if (ret) |
608 | goto failure; | |
609 | ||
1cfa0a75 | 610 | memset(&conn_param, 0, sizeof conn_param); |
1fc43132 | 611 | conn_param.responder_resources = ib_dev->attrs.max_qp_rd_atom; |
1cfa0a75 OG |
612 | conn_param.initiator_depth = 1; |
613 | conn_param.retry_count = 7; | |
614 | conn_param.rnr_retry_count = 6; | |
615 | ||
8d8399de | 616 | memset(&req_hdr, 0, sizeof(req_hdr)); |
59caaed7 | 617 | req_hdr.flags = ISER_ZBVA_NOT_SUP; |
1fc43132 | 618 | if (!iser_always_reg) |
59caaed7 | 619 | req_hdr.flags |= ISER_SEND_W_INV_NOT_SUP; |
d3cf81f9 SG |
620 | conn_param.private_data = (void *)&req_hdr; |
621 | conn_param.private_data_len = sizeof(struct iser_cm_hdr); | |
8d8399de | 622 | |
071ba4cc | 623 | ret = rdma_connect_locked(cma_id, &conn_param); |
1cfa0a75 OG |
624 | if (ret) { |
625 | iser_err("failure connecting: %d\n", ret); | |
626 | goto failure; | |
627 | } | |
628 | ||
b73c3ada | 629 | return; |
1cfa0a75 | 630 | failure: |
b73c3ada | 631 | iser_connect_error(cma_id); |
1cfa0a75 OG |
632 | } |
633 | ||
59caaed7 JD |
634 | static void iser_connected_handler(struct rdma_cm_id *cma_id, |
635 | const void *private_data) | |
1cfa0a75 | 636 | { |
5716af6e | 637 | struct iser_conn *iser_conn; |
4f9208ad OG |
638 | struct ib_qp_attr attr; |
639 | struct ib_qp_init_attr init_attr; | |
640 | ||
5716af6e SG |
641 | iser_conn = (struct iser_conn *)cma_id->context; |
642 | if (iser_conn->state != ISER_CONN_PENDING) | |
504130c0 AN |
643 | /* bailout */ |
644 | return; | |
645 | ||
4f9208ad OG |
646 | (void)ib_query_qp(cma_id->qp, &attr, ~0, &init_attr); |
647 | iser_info("remote qpn:%x my qpn:%x\n", attr.dest_qp_num, cma_id->qp->qp_num); | |
1cfa0a75 | 648 | |
59caaed7 JD |
649 | if (private_data) { |
650 | u8 flags = *(u8 *)private_data; | |
651 | ||
652 | iser_conn->snd_w_inv = !(flags & ISER_SEND_W_INV_NOT_SUP); | |
653 | } | |
654 | ||
655 | iser_info("conn %p: negotiated %s invalidation\n", | |
656 | iser_conn, iser_conn->snd_w_inv ? "remote" : "local"); | |
657 | ||
5716af6e SG |
658 | iser_conn->state = ISER_CONN_UP; |
659 | complete(&iser_conn->up_completion); | |
1cfa0a75 OG |
660 | } |
661 | ||
b73c3ada | 662 | static void iser_disconnected_handler(struct rdma_cm_id *cma_id) |
1cfa0a75 | 663 | { |
c47a3c9e | 664 | struct iser_conn *iser_conn = (struct iser_conn *)cma_id->context; |
1cfa0a75 | 665 | |
c47a3c9e | 666 | if (iser_conn_terminate(iser_conn)) { |
5716af6e | 667 | if (iser_conn->iscsi_conn) |
c47a3c9e SG |
668 | iscsi_conn_failure(iser_conn->iscsi_conn, |
669 | ISCSI_ERR_CONN_FAILED); | |
7d9eacf9 RD |
670 | else |
671 | iser_err("iscsi_iser connection isn't bound\n"); | |
672 | } | |
c47a3c9e SG |
673 | } |
674 | ||
675 | static void iser_cleanup_handler(struct rdma_cm_id *cma_id, | |
6606e6a2 | 676 | bool destroy) |
c47a3c9e SG |
677 | { |
678 | struct iser_conn *iser_conn = (struct iser_conn *)cma_id->context; | |
1cfa0a75 | 679 | |
c47a3c9e SG |
680 | /* |
681 | * We are not guaranteed that we visited disconnected_handler | |
682 | * by now, call it here to be safe that we handle CM drep | |
683 | * and flush errors. | |
8d4aca7f | 684 | */ |
c47a3c9e | 685 | iser_disconnected_handler(cma_id); |
6606e6a2 | 686 | iser_free_ib_conn_res(iser_conn, destroy); |
c47a3c9e | 687 | complete(&iser_conn->ib_completion); |
5bf0e4b8 | 688 | } |
1cfa0a75 OG |
689 | |
690 | static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
691 | { | |
5716af6e | 692 | struct iser_conn *iser_conn; |
c47a3c9e | 693 | int ret = 0; |
504130c0 | 694 | |
5716af6e | 695 | iser_conn = (struct iser_conn *)cma_id->context; |
871e00af SG |
696 | iser_info("%s (%d): status %d conn %p id %p\n", |
697 | rdma_event_msg(event->event), event->event, | |
698 | event->status, cma_id->context, cma_id); | |
1cfa0a75 | 699 | |
5716af6e | 700 | mutex_lock(&iser_conn->state_mutex); |
1cfa0a75 OG |
701 | switch (event->event) { |
702 | case RDMA_CM_EVENT_ADDR_RESOLVED: | |
b73c3ada | 703 | iser_addr_handler(cma_id); |
1cfa0a75 OG |
704 | break; |
705 | case RDMA_CM_EVENT_ROUTE_RESOLVED: | |
b73c3ada | 706 | iser_route_handler(cma_id); |
1cfa0a75 OG |
707 | break; |
708 | case RDMA_CM_EVENT_ESTABLISHED: | |
59caaed7 | 709 | iser_connected_handler(cma_id, event->param.conn.private_data); |
1cfa0a75 | 710 | break; |
97540bb9 SW |
711 | case RDMA_CM_EVENT_REJECTED: |
712 | iser_info("Connection rejected: %s\n", | |
713 | rdma_reject_msg(cma_id, event->status)); | |
df561f66 | 714 | fallthrough; |
1cfa0a75 OG |
715 | case RDMA_CM_EVENT_ADDR_ERROR: |
716 | case RDMA_CM_EVENT_ROUTE_ERROR: | |
717 | case RDMA_CM_EVENT_CONNECT_ERROR: | |
718 | case RDMA_CM_EVENT_UNREACHABLE: | |
b73c3ada | 719 | iser_connect_error(cma_id); |
1cfa0a75 OG |
720 | break; |
721 | case RDMA_CM_EVENT_DISCONNECTED: | |
2f5de151 | 722 | case RDMA_CM_EVENT_ADDR_CHANGE: |
5426b171 AN |
723 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: |
724 | iser_cleanup_handler(cma_id, false); | |
1cfa0a75 | 725 | break; |
c47a3c9e SG |
726 | case RDMA_CM_EVENT_DEVICE_REMOVAL: |
727 | /* | |
728 | * we *must* destroy the device as we cannot rely | |
729 | * on iscsid to be around to initiate error handling. | |
5426b171 AN |
730 | * also if we are not in state DOWN implicitly destroy |
731 | * the cma_id. | |
c47a3c9e SG |
732 | */ |
733 | iser_cleanup_handler(cma_id, true); | |
5426b171 AN |
734 | if (iser_conn->state != ISER_CONN_DOWN) { |
735 | iser_conn->ib_conn.cma_id = NULL; | |
736 | ret = 1; | |
737 | } | |
c47a3c9e | 738 | break; |
1cfa0a75 | 739 | default: |
871e00af SG |
740 | iser_err("Unexpected RDMA CM event: %s (%d)\n", |
741 | rdma_event_msg(event->event), event->event); | |
1cfa0a75 OG |
742 | break; |
743 | } | |
5716af6e | 744 | mutex_unlock(&iser_conn->state_mutex); |
c47a3c9e SG |
745 | |
746 | return ret; | |
1cfa0a75 OG |
747 | } |
748 | ||
5716af6e | 749 | void iser_conn_init(struct iser_conn *iser_conn) |
1cfa0a75 | 750 | { |
cfeb91b3 CH |
751 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
752 | ||
5716af6e | 753 | iser_conn->state = ISER_CONN_INIT; |
5716af6e | 754 | init_completion(&iser_conn->stop_completion); |
c47a3c9e | 755 | init_completion(&iser_conn->ib_completion); |
5716af6e SG |
756 | init_completion(&iser_conn->up_completion); |
757 | INIT_LIST_HEAD(&iser_conn->conn_list); | |
5716af6e | 758 | mutex_init(&iser_conn->state_mutex); |
cfeb91b3 CH |
759 | |
760 | ib_conn->post_recv_buf_count = 0; | |
761 | ib_conn->reg_cqe.done = iser_reg_comp; | |
1cfa0a75 OG |
762 | } |
763 | ||
bf194997 | 764 | /* |
1cfa0a75 | 765 | * starts the process of connecting to the target |
94e2bd68 | 766 | * sleeps until the connection is established or rejected |
1cfa0a75 | 767 | */ |
5716af6e | 768 | int iser_connect(struct iser_conn *iser_conn, |
96ed02d4 RD |
769 | struct sockaddr *src_addr, |
770 | struct sockaddr *dst_addr, | |
1cfa0a75 OG |
771 | int non_blocking) |
772 | { | |
a4ee3539 | 773 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
1cfa0a75 OG |
774 | int err = 0; |
775 | ||
5716af6e | 776 | mutex_lock(&iser_conn->state_mutex); |
504130c0 | 777 | |
5716af6e | 778 | sprintf(iser_conn->name, "%pISp", dst_addr); |
96ed02d4 | 779 | |
5716af6e | 780 | iser_info("connecting to: %s\n", iser_conn->name); |
1cfa0a75 OG |
781 | |
782 | /* the device is known only --after-- address resolution */ | |
a4ee3539 | 783 | ib_conn->device = NULL; |
1cfa0a75 | 784 | |
5716af6e | 785 | iser_conn->state = ISER_CONN_PENDING; |
1cfa0a75 | 786 | |
fa20105e | 787 | ib_conn->cma_id = rdma_create_id(&init_net, iser_cma_handler, |
a4ee3539 SG |
788 | (void *)iser_conn, |
789 | RDMA_PS_TCP, IB_QPT_RC); | |
790 | if (IS_ERR(ib_conn->cma_id)) { | |
791 | err = PTR_ERR(ib_conn->cma_id); | |
1cfa0a75 OG |
792 | iser_err("rdma_create_id failed: %d\n", err); |
793 | goto id_failure; | |
794 | } | |
795 | ||
a4ee3539 | 796 | err = rdma_resolve_addr(ib_conn->cma_id, src_addr, dst_addr, 1000); |
1cfa0a75 OG |
797 | if (err) { |
798 | iser_err("rdma_resolve_addr failed: %d\n", err); | |
799 | goto addr_failure; | |
800 | } | |
801 | ||
802 | if (!non_blocking) { | |
5716af6e | 803 | wait_for_completion_interruptible(&iser_conn->up_completion); |
1cfa0a75 | 804 | |
5716af6e | 805 | if (iser_conn->state != ISER_CONN_UP) { |
1cfa0a75 OG |
806 | err = -EIO; |
807 | goto connect_failure; | |
808 | } | |
809 | } | |
5716af6e | 810 | mutex_unlock(&iser_conn->state_mutex); |
1cfa0a75 OG |
811 | |
812 | mutex_lock(&ig.connlist_mutex); | |
5716af6e | 813 | list_add(&iser_conn->conn_list, &ig.connlist); |
1cfa0a75 OG |
814 | mutex_unlock(&ig.connlist_mutex); |
815 | return 0; | |
816 | ||
817 | id_failure: | |
a4ee3539 | 818 | ib_conn->cma_id = NULL; |
1cfa0a75 | 819 | addr_failure: |
5716af6e | 820 | iser_conn->state = ISER_CONN_DOWN; |
1cfa0a75 | 821 | connect_failure: |
5716af6e SG |
822 | mutex_unlock(&iser_conn->state_mutex); |
823 | iser_conn_release(iser_conn); | |
1cfa0a75 OG |
824 | return err; |
825 | } | |
826 | ||
5716af6e | 827 | int iser_post_recvl(struct iser_conn *iser_conn) |
bcc60c38 | 828 | { |
a4ee3539 | 829 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
0f512b34 | 830 | struct iser_login_desc *desc = &iser_conn->login_desc; |
604dbdc4 | 831 | struct ib_recv_wr wr; |
bcc60c38 OG |
832 | int ib_ret; |
833 | ||
0f512b34 SG |
834 | desc->sge.addr = desc->rsp_dma; |
835 | desc->sge.length = ISER_RX_LOGIN_SIZE; | |
836 | desc->sge.lkey = ib_conn->device->pd->local_dma_lkey; | |
bcc60c38 | 837 | |
cfeb91b3 CH |
838 | desc->cqe.done = iser_login_rsp; |
839 | wr.wr_cqe = &desc->cqe; | |
840 | wr.sg_list = &desc->sge; | |
841 | wr.num_sge = 1; | |
842 | wr.next = NULL; | |
bcc60c38 | 843 | |
a4ee3539 | 844 | ib_conn->post_recv_buf_count++; |
604dbdc4 | 845 | ib_ret = ib_post_recv(ib_conn->qp, &wr, NULL); |
bcc60c38 OG |
846 | if (ib_ret) { |
847 | iser_err("ib_post_recv failed ret=%d\n", ib_ret); | |
a4ee3539 | 848 | ib_conn->post_recv_buf_count--; |
bcc60c38 | 849 | } |
cfeb91b3 | 850 | |
bcc60c38 OG |
851 | return ib_ret; |
852 | } | |
853 | ||
5716af6e | 854 | int iser_post_recvm(struct iser_conn *iser_conn, int count) |
bcc60c38 | 855 | { |
a4ee3539 | 856 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
5716af6e | 857 | unsigned int my_rx_head = iser_conn->rx_desc_head; |
bcc60c38 | 858 | struct iser_rx_desc *rx_desc; |
604dbdc4 | 859 | struct ib_recv_wr *wr; |
cfeb91b3 | 860 | int i, ib_ret; |
bcc60c38 | 861 | |
cfeb91b3 CH |
862 | for (wr = ib_conn->rx_wr, i = 0; i < count; i++, wr++) { |
863 | rx_desc = &iser_conn->rx_descs[my_rx_head]; | |
864 | rx_desc->cqe.done = iser_task_rsp; | |
865 | wr->wr_cqe = &rx_desc->cqe; | |
866 | wr->sg_list = &rx_desc->rx_sg; | |
867 | wr->num_sge = 1; | |
868 | wr->next = wr + 1; | |
5716af6e | 869 | my_rx_head = (my_rx_head + 1) & iser_conn->qp_max_recv_dtos_mask; |
bcc60c38 OG |
870 | } |
871 | ||
cfeb91b3 CH |
872 | wr--; |
873 | wr->next = NULL; /* mark end of work requests list */ | |
bcc60c38 | 874 | |
a4ee3539 | 875 | ib_conn->post_recv_buf_count += count; |
604dbdc4 | 876 | ib_ret = ib_post_recv(ib_conn->qp, ib_conn->rx_wr, NULL); |
70bcc63f | 877 | if (unlikely(ib_ret)) { |
bcc60c38 | 878 | iser_err("ib_post_recv failed ret=%d\n", ib_ret); |
a4ee3539 | 879 | ib_conn->post_recv_buf_count -= count; |
bcc60c38 | 880 | } else |
5716af6e | 881 | iser_conn->rx_desc_head = my_rx_head; |
cfeb91b3 | 882 | |
bcc60c38 OG |
883 | return ib_ret; |
884 | } | |
885 | ||
886 | ||
1cfa0a75 | 887 | /** |
134a42a6 | 888 | * iser_post_send - Initiate a Send DTO operation |
889 | * @ib_conn: connection RDMA resources | |
890 | * @tx_desc: iSER TX descriptor | |
891 | * @signal: true to send work request as SIGNALED | |
1cfa0a75 | 892 | * |
134a42a6 | 893 | * Return: 0 on success, -1 on failure |
1cfa0a75 | 894 | */ |
6df5a128 SG |
895 | int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, |
896 | bool signal) | |
1cfa0a75 | 897 | { |
b9294f8b IR |
898 | struct ib_send_wr *wr = &tx_desc->send_wr; |
899 | struct ib_send_wr *first_wr; | |
7332bed0 | 900 | int ib_ret; |
1cfa0a75 | 901 | |
a4ee3539 | 902 | ib_dma_sync_single_for_device(ib_conn->device->ib_device, |
5716af6e SG |
903 | tx_desc->dma_addr, ISER_HEADERS_LEN, |
904 | DMA_TO_DEVICE); | |
1cfa0a75 | 905 | |
7332bed0 | 906 | wr->next = NULL; |
cfeb91b3 | 907 | wr->wr_cqe = &tx_desc->cqe; |
7332bed0 SG |
908 | wr->sg_list = tx_desc->tx_sg; |
909 | wr->num_sge = tx_desc->num_sge; | |
910 | wr->opcode = IB_WR_SEND; | |
911 | wr->send_flags = signal ? IB_SEND_SIGNALED : 0; | |
1cfa0a75 | 912 | |
b9294f8b IR |
913 | if (tx_desc->inv_wr.next) |
914 | first_wr = &tx_desc->inv_wr; | |
915 | else if (tx_desc->reg_wr.wr.next) | |
916 | first_wr = &tx_desc->reg_wr.wr; | |
917 | else | |
918 | first_wr = wr; | |
919 | ||
920 | ib_ret = ib_post_send(ib_conn->qp, first_wr, NULL); | |
70bcc63f | 921 | if (unlikely(ib_ret)) |
7332bed0 | 922 | iser_err("ib_post_send failed, ret:%d opcode:%d\n", |
604dbdc4 | 923 | ib_ret, wr->opcode); |
ff3dd52d | 924 | |
f19624aa | 925 | return ib_ret; |
1cfa0a75 OG |
926 | } |
927 | ||
0a7a08ad SG |
928 | u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, |
929 | enum iser_data_dir cmd_dir, sector_t *sector) | |
930 | { | |
b130eded | 931 | struct iser_mem_reg *reg = &iser_task->rdma_reg[cmd_dir]; |
5190cc26 | 932 | struct iser_fr_desc *desc = reg->mem_h; |
0a7a08ad SG |
933 | unsigned long sector_size = iser_task->sc->device->sector_size; |
934 | struct ib_mr_status mr_status; | |
935 | int ret; | |
936 | ||
b76a4399 | 937 | if (desc && desc->sig_protected) { |
c934833e | 938 | desc->sig_protected = false; |
b76a4399 | 939 | ret = ib_check_mr_status(desc->rsc.sig_mr, |
0a7a08ad SG |
940 | IB_MR_CHECK_SIG_STATUS, &mr_status); |
941 | if (ret) { | |
3466c060 | 942 | iser_err("ib_check_mr_status failed, ret %d\n", ret); |
24c3456c SG |
943 | /* Not a lot we can do, return ambiguous guard error */ |
944 | *sector = 0; | |
945 | return 0x1; | |
0a7a08ad SG |
946 | } |
947 | ||
948 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
949 | sector_t sector_off = mr_status.sig_err.sig_err_offset; | |
950 | ||
2c63d107 | 951 | sector_div(sector_off, sector_size + 8); |
87662a47 | 952 | *sector = scsi_get_sector(iser_task->sc) + sector_off; |
0a7a08ad | 953 | |
3466c060 | 954 | iser_err("PI error found type %d at sector %llx " |
0a7a08ad | 955 | "expected %x vs actual %x\n", |
39c978cd RD |
956 | mr_status.sig_err.err_type, |
957 | (unsigned long long)*sector, | |
0a7a08ad SG |
958 | mr_status.sig_err.expected, |
959 | mr_status.sig_err.actual); | |
960 | ||
961 | switch (mr_status.sig_err.err_type) { | |
962 | case IB_SIG_BAD_GUARD: | |
963 | return 0x1; | |
964 | case IB_SIG_BAD_REFTAG: | |
965 | return 0x3; | |
966 | case IB_SIG_BAD_APPTAG: | |
967 | return 0x2; | |
968 | } | |
969 | } | |
970 | } | |
971 | ||
972 | return 0; | |
0a7a08ad | 973 | } |
cfeb91b3 CH |
974 | |
975 | void iser_err_comp(struct ib_wc *wc, const char *type) | |
976 | { | |
977 | if (wc->status != IB_WC_WR_FLUSH_ERR) { | |
978 | struct iser_conn *iser_conn = to_iser_conn(wc->qp->qp_context); | |
979 | ||
b04dc199 | 980 | iser_err("%s failure: %s (%d) vend_err %#x\n", type, |
cfeb91b3 CH |
981 | ib_wc_status_msg(wc->status), wc->status, |
982 | wc->vendor_err); | |
983 | ||
984 | if (iser_conn->iscsi_conn) | |
985 | iscsi_conn_failure(iser_conn->iscsi_conn, | |
986 | ISCSI_ERR_CONN_FAILED); | |
987 | } else { | |
988 | iser_dbg("%s failure: %s (%d)\n", type, | |
989 | ib_wc_status_msg(wc->status), wc->status); | |
990 | } | |
991 | } |