Commit | Line | Data |
---|---|---|
b8d26b3b NB |
1 | /******************************************************************************* |
2 | * This file contains iSCSI extentions for RDMA (iSER) Verbs | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2013 Datera, Inc. |
b8d26b3b NB |
5 | * |
6 | * Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ****************************************************************************/ | |
18 | ||
19 | #include <linux/string.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/scatterlist.h> | |
22 | #include <linux/socket.h> | |
23 | #include <linux/in.h> | |
24 | #include <linux/in6.h> | |
25 | #include <rdma/ib_verbs.h> | |
26 | #include <rdma/rdma_cm.h> | |
27 | #include <target/target_core_base.h> | |
28 | #include <target/target_core_fabric.h> | |
29 | #include <target/iscsi/iscsi_transport.h> | |
531b7bf4 | 30 | #include <linux/semaphore.h> |
b8d26b3b | 31 | |
b8d26b3b NB |
32 | #include "ib_isert.h" |
33 | ||
34 | #define ISERT_MAX_CONN 8 | |
35 | #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN) | |
38a2d0d4 CH |
36 | #define ISER_MAX_TX_CQ_LEN \ |
37 | ((ISERT_QP_MAX_REQ_DTOS + ISCSI_DEF_XMIT_CMDS_MAX) * ISERT_MAX_CONN) | |
bdf20e72 SG |
38 | #define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \ |
39 | ISERT_MAX_CONN) | |
b8d26b3b | 40 | |
45678b6b | 41 | static int isert_debug_level; |
24f412dd SG |
42 | module_param_named(debug_level, isert_debug_level, int, 0644); |
43 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)"); | |
44 | ||
b8d26b3b NB |
45 | static DEFINE_MUTEX(device_list_mutex); |
46 | static LIST_HEAD(device_list); | |
b8d26b3b | 47 | static struct workqueue_struct *isert_comp_wq; |
b02efbfc | 48 | static struct workqueue_struct *isert_release_wq; |
b8d26b3b | 49 | |
f93f3a70 SG |
50 | static int |
51 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); | |
2371e5da | 52 | static int |
9679cc51 | 53 | isert_login_post_recv(struct isert_conn *isert_conn); |
2371e5da SG |
54 | static int |
55 | isert_rdma_accept(struct isert_conn *isert_conn); | |
ca6c1d82 | 56 | struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); |
d40945d8 | 57 | |
2f1b6b7d | 58 | static void isert_release_work(struct work_struct *work); |
9679cc51 CH |
59 | static void isert_recv_done(struct ib_cq *cq, struct ib_wc *wc); |
60 | static void isert_send_done(struct ib_cq *cq, struct ib_wc *wc); | |
61 | static void isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc); | |
62 | static void isert_login_send_done(struct ib_cq *cq, struct ib_wc *wc); | |
2f1b6b7d | 63 | |
302cc7c3 SG |
64 | static inline bool |
65 | isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) | |
66 | { | |
23a548ee | 67 | return (conn->pi_support && |
302cc7c3 SG |
68 | cmd->prot_op != TARGET_PROT_NORMAL); |
69 | } | |
70 | ||
71 | ||
b8d26b3b NB |
72 | static void |
73 | isert_qp_event_callback(struct ib_event *e, void *context) | |
74 | { | |
6700425e | 75 | struct isert_conn *isert_conn = context; |
b8d26b3b | 76 | |
ea8a1616 SG |
77 | isert_err("%s (%d): conn %p\n", |
78 | ib_event_msg(e->event), e->event, isert_conn); | |
79 | ||
b8d26b3b NB |
80 | switch (e->event) { |
81 | case IB_EVENT_COMM_EST: | |
dac6ab30 | 82 | rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST); |
b8d26b3b NB |
83 | break; |
84 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
4c22e07f | 85 | isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); |
b8d26b3b NB |
86 | break; |
87 | default: | |
88 | break; | |
89 | } | |
90 | } | |
91 | ||
40fc069a SG |
92 | static struct isert_comp * |
93 | isert_comp_get(struct isert_conn *isert_conn) | |
b8d26b3b | 94 | { |
dac6ab30 | 95 | struct isert_device *device = isert_conn->device; |
4a295bae | 96 | struct isert_comp *comp; |
40fc069a | 97 | int i, min = 0; |
b8d26b3b | 98 | |
b8d26b3b | 99 | mutex_lock(&device_list_mutex); |
4a295bae SG |
100 | for (i = 0; i < device->comps_used; i++) |
101 | if (device->comps[i].active_qps < | |
102 | device->comps[min].active_qps) | |
103 | min = i; | |
104 | comp = &device->comps[min]; | |
105 | comp->active_qps++; | |
40fc069a SG |
106 | mutex_unlock(&device_list_mutex); |
107 | ||
24f412dd | 108 | isert_info("conn %p, using comp %p min_index: %d\n", |
4a295bae | 109 | isert_conn, comp, min); |
40fc069a SG |
110 | |
111 | return comp; | |
112 | } | |
113 | ||
114 | static void | |
115 | isert_comp_put(struct isert_comp *comp) | |
116 | { | |
117 | mutex_lock(&device_list_mutex); | |
118 | comp->active_qps--; | |
b8d26b3b | 119 | mutex_unlock(&device_list_mutex); |
40fc069a SG |
120 | } |
121 | ||
122 | static struct ib_qp * | |
123 | isert_create_qp(struct isert_conn *isert_conn, | |
124 | struct isert_comp *comp, | |
125 | struct rdma_cm_id *cma_id) | |
126 | { | |
dac6ab30 | 127 | struct isert_device *device = isert_conn->device; |
40fc069a SG |
128 | struct ib_qp_init_attr attr; |
129 | int ret; | |
b8d26b3b NB |
130 | |
131 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); | |
132 | attr.event_handler = isert_qp_event_callback; | |
133 | attr.qp_context = isert_conn; | |
6f0fae3d SG |
134 | attr.send_cq = comp->cq; |
135 | attr.recv_cq = comp->cq; | |
572a1434 | 136 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS + 1; |
bdf20e72 | 137 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; |
38a2d0d4 | 138 | attr.cap.max_rdma_ctxs = ISCSI_DEF_XMIT_CMDS_MAX; |
4a061b28 | 139 | attr.cap.max_send_sge = device->ib_device->attrs.max_sge; |
b8d26b3b NB |
140 | attr.cap.max_recv_sge = 1; |
141 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
142 | attr.qp_type = IB_QPT_RC; | |
570db170 | 143 | if (device->pi_capable) |
d3e125da | 144 | attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; |
b8d26b3b | 145 | |
67cb3949 | 146 | ret = rdma_create_qp(cma_id, device->pd, &attr); |
b8d26b3b | 147 | if (ret) { |
24f412dd | 148 | isert_err("rdma_create_qp failed for cma_id %d\n", ret); |
40fc069a SG |
149 | return ERR_PTR(ret); |
150 | } | |
151 | ||
152 | return cma_id->qp; | |
153 | } | |
154 | ||
155 | static int | |
156 | isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) | |
157 | { | |
158 | struct isert_comp *comp; | |
159 | int ret; | |
160 | ||
161 | comp = isert_comp_get(isert_conn); | |
dac6ab30 SG |
162 | isert_conn->qp = isert_create_qp(isert_conn, comp, cma_id); |
163 | if (IS_ERR(isert_conn->qp)) { | |
164 | ret = PTR_ERR(isert_conn->qp); | |
19e2090f | 165 | goto err; |
b8d26b3b | 166 | } |
b8d26b3b NB |
167 | |
168 | return 0; | |
19e2090f | 169 | err: |
40fc069a | 170 | isert_comp_put(comp); |
19e2090f | 171 | return ret; |
b8d26b3b NB |
172 | } |
173 | ||
b8d26b3b NB |
174 | static int |
175 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
176 | { | |
dac6ab30 | 177 | struct isert_device *device = isert_conn->device; |
67cb3949 | 178 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
179 | struct iser_rx_desc *rx_desc; |
180 | struct ib_sge *rx_sg; | |
181 | u64 dma_addr; | |
182 | int i, j; | |
183 | ||
dac6ab30 | 184 | isert_conn->rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * |
b8d26b3b | 185 | sizeof(struct iser_rx_desc), GFP_KERNEL); |
dac6ab30 | 186 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
187 | goto fail; |
188 | ||
dac6ab30 | 189 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
190 | |
191 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
192 | dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, | |
193 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
194 | if (ib_dma_mapping_error(ib_dev, dma_addr)) | |
195 | goto dma_map_fail; | |
196 | ||
197 | rx_desc->dma_addr = dma_addr; | |
198 | ||
199 | rx_sg = &rx_desc->rx_sg; | |
200 | rx_sg->addr = rx_desc->dma_addr; | |
201 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; | |
34efc7df | 202 | rx_sg->lkey = device->pd->local_dma_lkey; |
9679cc51 | 203 | rx_desc->rx_cqe.done = isert_recv_done; |
b8d26b3b NB |
204 | } |
205 | ||
b8d26b3b NB |
206 | return 0; |
207 | ||
208 | dma_map_fail: | |
dac6ab30 | 209 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
210 | for (j = 0; j < i; j++, rx_desc++) { |
211 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
212 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
213 | } | |
dac6ab30 SG |
214 | kfree(isert_conn->rx_descs); |
215 | isert_conn->rx_descs = NULL; | |
b8d26b3b | 216 | fail: |
4c22e07f SG |
217 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
218 | ||
b8d26b3b NB |
219 | return -ENOMEM; |
220 | } | |
221 | ||
222 | static void | |
223 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
224 | { | |
dac6ab30 | 225 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
226 | struct iser_rx_desc *rx_desc; |
227 | int i; | |
228 | ||
dac6ab30 | 229 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
230 | return; |
231 | ||
dac6ab30 | 232 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
233 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
234 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
235 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
236 | } | |
237 | ||
dac6ab30 SG |
238 | kfree(isert_conn->rx_descs); |
239 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
240 | } |
241 | ||
172369c5 SG |
242 | static void |
243 | isert_free_comps(struct isert_device *device) | |
b8d26b3b | 244 | { |
172369c5 | 245 | int i; |
59464ef4 | 246 | |
172369c5 SG |
247 | for (i = 0; i < device->comps_used; i++) { |
248 | struct isert_comp *comp = &device->comps[i]; | |
b1a5ad00 | 249 | |
9679cc51 CH |
250 | if (comp->cq) |
251 | ib_free_cq(comp->cq); | |
59464ef4 | 252 | } |
172369c5 SG |
253 | kfree(device->comps); |
254 | } | |
d40945d8 | 255 | |
172369c5 | 256 | static int |
4a061b28 | 257 | isert_alloc_comps(struct isert_device *device) |
172369c5 SG |
258 | { |
259 | int i, max_cqe, ret = 0; | |
d3e125da | 260 | |
4a295bae | 261 | device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), |
172369c5 SG |
262 | device->ib_device->num_comp_vectors)); |
263 | ||
24f412dd | 264 | isert_info("Using %d CQs, %s supports %d vectors support " |
38a2d0d4 | 265 | "pi_capable %d\n", |
4a295bae | 266 | device->comps_used, device->ib_device->name, |
38a2d0d4 | 267 | device->ib_device->num_comp_vectors, |
4a295bae SG |
268 | device->pi_capable); |
269 | ||
270 | device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), | |
271 | GFP_KERNEL); | |
272 | if (!device->comps) { | |
24f412dd | 273 | isert_err("Unable to allocate completion contexts\n"); |
b8d26b3b NB |
274 | return -ENOMEM; |
275 | } | |
4a295bae | 276 | |
4a061b28 | 277 | max_cqe = min(ISER_MAX_CQ_LEN, device->ib_device->attrs.max_cqe); |
172369c5 | 278 | |
4a295bae SG |
279 | for (i = 0; i < device->comps_used; i++) { |
280 | struct isert_comp *comp = &device->comps[i]; | |
281 | ||
282 | comp->device = device; | |
9679cc51 CH |
283 | comp->cq = ib_alloc_cq(device->ib_device, comp, max_cqe, i, |
284 | IB_POLL_WORKQUEUE); | |
6f0fae3d | 285 | if (IS_ERR(comp->cq)) { |
172369c5 | 286 | isert_err("Unable to allocate cq\n"); |
6f0fae3d SG |
287 | ret = PTR_ERR(comp->cq); |
288 | comp->cq = NULL; | |
b8d26b3b | 289 | goto out_cq; |
94a71110 | 290 | } |
b8d26b3b NB |
291 | } |
292 | ||
172369c5 SG |
293 | return 0; |
294 | out_cq: | |
295 | isert_free_comps(device); | |
296 | return ret; | |
297 | } | |
298 | ||
299 | static int | |
300 | isert_create_device_ib_res(struct isert_device *device) | |
301 | { | |
4a061b28 | 302 | struct ib_device *ib_dev = device->ib_device; |
fd8205e8 | 303 | int ret; |
172369c5 | 304 | |
4a061b28 OG |
305 | isert_dbg("devattr->max_sge: %d\n", ib_dev->attrs.max_sge); |
306 | isert_dbg("devattr->max_sge_rd: %d\n", ib_dev->attrs.max_sge_rd); | |
172369c5 | 307 | |
4a061b28 | 308 | ret = isert_alloc_comps(device); |
172369c5 | 309 | if (ret) |
373a4cd7 | 310 | goto out; |
172369c5 | 311 | |
4a061b28 | 312 | device->pd = ib_alloc_pd(ib_dev); |
67cb3949 SG |
313 | if (IS_ERR(device->pd)) { |
314 | ret = PTR_ERR(device->pd); | |
315 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
316 | device, ret); | |
317 | goto out_cq; | |
318 | } | |
319 | ||
172369c5 | 320 | /* Check signature cap */ |
4a061b28 | 321 | device->pi_capable = ib_dev->attrs.device_cap_flags & |
172369c5 | 322 | IB_DEVICE_SIGNATURE_HANDOVER ? true : false; |
67cb3949 | 323 | |
b8d26b3b NB |
324 | return 0; |
325 | ||
326 | out_cq: | |
172369c5 | 327 | isert_free_comps(device); |
373a4cd7 NB |
328 | out: |
329 | if (ret > 0) | |
330 | ret = -EINVAL; | |
b8d26b3b NB |
331 | return ret; |
332 | } | |
333 | ||
334 | static void | |
335 | isert_free_device_ib_res(struct isert_device *device) | |
336 | { | |
24f412dd | 337 | isert_info("device %p\n", device); |
b8d26b3b | 338 | |
67cb3949 | 339 | ib_dealloc_pd(device->pd); |
172369c5 | 340 | isert_free_comps(device); |
b8d26b3b NB |
341 | } |
342 | ||
343 | static void | |
cf8ae958 | 344 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
345 | { |
346 | mutex_lock(&device_list_mutex); | |
347 | device->refcount--; | |
4c22e07f | 348 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
349 | if (!device->refcount) { |
350 | isert_free_device_ib_res(device); | |
351 | list_del(&device->dev_node); | |
352 | kfree(device); | |
353 | } | |
354 | mutex_unlock(&device_list_mutex); | |
355 | } | |
356 | ||
357 | static struct isert_device * | |
cf8ae958 | 358 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
359 | { |
360 | struct isert_device *device; | |
361 | int ret; | |
362 | ||
363 | mutex_lock(&device_list_mutex); | |
364 | list_for_each_entry(device, &device_list, dev_node) { | |
365 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
366 | device->refcount++; | |
4c22e07f SG |
367 | isert_info("Found iser device %p refcount %d\n", |
368 | device, device->refcount); | |
b8d26b3b NB |
369 | mutex_unlock(&device_list_mutex); |
370 | return device; | |
371 | } | |
372 | } | |
373 | ||
374 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
375 | if (!device) { | |
376 | mutex_unlock(&device_list_mutex); | |
377 | return ERR_PTR(-ENOMEM); | |
378 | } | |
379 | ||
380 | INIT_LIST_HEAD(&device->dev_node); | |
381 | ||
382 | device->ib_device = cma_id->device; | |
383 | ret = isert_create_device_ib_res(device); | |
384 | if (ret) { | |
385 | kfree(device); | |
386 | mutex_unlock(&device_list_mutex); | |
387 | return ERR_PTR(ret); | |
388 | } | |
389 | ||
390 | device->refcount++; | |
391 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
392 | isert_info("Created a new iser device %p refcount %d\n", |
393 | device, device->refcount); | |
b8d26b3b NB |
394 | mutex_unlock(&device_list_mutex); |
395 | ||
396 | return device; | |
397 | } | |
398 | ||
ae9ea9ed SG |
399 | static void |
400 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 401 | { |
b8d26b3b | 402 | isert_conn->state = ISER_CONN_INIT; |
bd379220 | 403 | INIT_LIST_HEAD(&isert_conn->node); |
dac6ab30 | 404 | init_completion(&isert_conn->login_comp); |
2371e5da | 405 | init_completion(&isert_conn->login_req_comp); |
63b268d2 | 406 | init_waitqueue_head(&isert_conn->rem_wait); |
dac6ab30 SG |
407 | kref_init(&isert_conn->kref); |
408 | mutex_init(&isert_conn->mutex); | |
2f1b6b7d | 409 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
ae9ea9ed | 410 | } |
b8d26b3b | 411 | |
ae9ea9ed SG |
412 | static void |
413 | isert_free_login_buf(struct isert_conn *isert_conn) | |
414 | { | |
dac6ab30 | 415 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
416 | |
417 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
ed1083b2 | 418 | ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE); |
5adabdd1 CH |
419 | kfree(isert_conn->login_rsp_buf); |
420 | ||
ae9ea9ed | 421 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, |
5adabdd1 | 422 | ISER_RX_PAYLOAD_SIZE, |
ae9ea9ed | 423 | DMA_FROM_DEVICE); |
5adabdd1 | 424 | kfree(isert_conn->login_req_buf); |
ae9ea9ed SG |
425 | } |
426 | ||
427 | static int | |
428 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
429 | struct ib_device *ib_dev) | |
430 | { | |
431 | int ret; | |
b8d26b3b | 432 | |
5adabdd1 CH |
433 | isert_conn->login_req_buf = kzalloc(sizeof(*isert_conn->login_req_buf), |
434 | GFP_KERNEL); | |
435 | if (!isert_conn->login_req_buf) { | |
24f412dd | 436 | isert_err("Unable to allocate isert_conn->login_buf\n"); |
ae9ea9ed | 437 | return -ENOMEM; |
b8d26b3b NB |
438 | } |
439 | ||
b8d26b3b | 440 | isert_conn->login_req_dma = ib_dma_map_single(ib_dev, |
5adabdd1 CH |
441 | isert_conn->login_req_buf, |
442 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
443 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); |
444 | if (ret) { | |
ae9ea9ed | 445 | isert_err("login_req_dma mapping error: %d\n", ret); |
b8d26b3b | 446 | isert_conn->login_req_dma = 0; |
5adabdd1 CH |
447 | goto out_free_login_req_buf; |
448 | } | |
449 | ||
450 | isert_conn->login_rsp_buf = kzalloc(ISER_RX_PAYLOAD_SIZE, GFP_KERNEL); | |
451 | if (!isert_conn->login_rsp_buf) { | |
1d5840c9 | 452 | ret = -ENOMEM; |
5adabdd1 | 453 | goto out_unmap_login_req_buf; |
b8d26b3b NB |
454 | } |
455 | ||
456 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
5adabdd1 | 457 | isert_conn->login_rsp_buf, |
ed1083b2 | 458 | ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE); |
b8d26b3b NB |
459 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); |
460 | if (ret) { | |
ae9ea9ed | 461 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b | 462 | isert_conn->login_rsp_dma = 0; |
5adabdd1 | 463 | goto out_free_login_rsp_buf; |
b8d26b3b NB |
464 | } |
465 | ||
ae9ea9ed SG |
466 | return 0; |
467 | ||
5adabdd1 CH |
468 | out_free_login_rsp_buf: |
469 | kfree(isert_conn->login_rsp_buf); | |
470 | out_unmap_login_req_buf: | |
ae9ea9ed | 471 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, |
5adabdd1 CH |
472 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); |
473 | out_free_login_req_buf: | |
474 | kfree(isert_conn->login_req_buf); | |
ae9ea9ed SG |
475 | return ret; |
476 | } | |
477 | ||
422bd0ac JD |
478 | static void |
479 | isert_set_nego_params(struct isert_conn *isert_conn, | |
480 | struct rdma_conn_param *param) | |
481 | { | |
482 | struct ib_device_attr *attr = &isert_conn->device->ib_device->attrs; | |
483 | ||
484 | /* Set max inflight RDMA READ requests */ | |
485 | isert_conn->initiator_depth = min_t(u8, param->initiator_depth, | |
486 | attr->max_qp_init_rd_atom); | |
487 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); | |
488 | ||
489 | if (param->private_data) { | |
490 | u8 flags = *(u8 *)param->private_data; | |
491 | ||
492 | /* | |
493 | * use remote invalidation if the both initiator | |
494 | * and the HCA support it | |
495 | */ | |
496 | isert_conn->snd_w_inv = !(flags & ISER_SEND_W_INV_NOT_SUP) && | |
497 | (attr->device_cap_flags & | |
498 | IB_DEVICE_MEM_MGT_EXTENSIONS); | |
499 | if (isert_conn->snd_w_inv) | |
500 | isert_info("Using remote invalidation\n"); | |
501 | } | |
502 | } | |
503 | ||
ae9ea9ed SG |
504 | static int |
505 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
506 | { | |
507 | struct isert_np *isert_np = cma_id->context; | |
508 | struct iscsi_np *np = isert_np->np; | |
509 | struct isert_conn *isert_conn; | |
510 | struct isert_device *device; | |
511 | int ret = 0; | |
512 | ||
513 | spin_lock_bh(&np->np_thread_lock); | |
514 | if (!np->enabled) { | |
515 | spin_unlock_bh(&np->np_thread_lock); | |
516 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
517 | return rdma_reject(cma_id, NULL, 0); | |
518 | } | |
519 | spin_unlock_bh(&np->np_thread_lock); | |
520 | ||
521 | isert_dbg("cma_id: %p, portal: %p\n", | |
522 | cma_id, cma_id->context); | |
523 | ||
524 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
525 | if (!isert_conn) | |
526 | return -ENOMEM; | |
527 | ||
528 | isert_init_conn(isert_conn); | |
dac6ab30 | 529 | isert_conn->cm_id = cma_id; |
ae9ea9ed SG |
530 | |
531 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); | |
532 | if (ret) | |
533 | goto out; | |
534 | ||
cf8ae958 | 535 | device = isert_device_get(cma_id); |
b8d26b3b NB |
536 | if (IS_ERR(device)) { |
537 | ret = PTR_ERR(device); | |
538 | goto out_rsp_dma_map; | |
539 | } | |
dac6ab30 | 540 | isert_conn->device = device; |
b8d26b3b | 541 | |
422bd0ac | 542 | isert_set_nego_params(isert_conn, &event->param.conn); |
1a92e17e | 543 | |
570db170 | 544 | ret = isert_conn_setup_qp(isert_conn, cma_id); |
b8d26b3b NB |
545 | if (ret) |
546 | goto out_conn_dev; | |
547 | ||
9679cc51 | 548 | ret = isert_login_post_recv(isert_conn); |
2371e5da SG |
549 | if (ret) |
550 | goto out_conn_dev; | |
551 | ||
552 | ret = isert_rdma_accept(isert_conn); | |
553 | if (ret) | |
554 | goto out_conn_dev; | |
555 | ||
ed8cb0a4 | 556 | mutex_lock(&isert_np->mutex); |
bd379220 | 557 | list_add_tail(&isert_conn->node, &isert_np->accepted); |
ed8cb0a4 | 558 | mutex_unlock(&isert_np->mutex); |
b8d26b3b | 559 | |
b8d26b3b NB |
560 | return 0; |
561 | ||
562 | out_conn_dev: | |
cf8ae958 | 563 | isert_device_put(device); |
b8d26b3b | 564 | out_rsp_dma_map: |
ae9ea9ed | 565 | isert_free_login_buf(isert_conn); |
b8d26b3b NB |
566 | out: |
567 | kfree(isert_conn); | |
2371e5da | 568 | rdma_reject(cma_id, NULL, 0); |
b8d26b3b NB |
569 | return ret; |
570 | } | |
571 | ||
572 | static void | |
573 | isert_connect_release(struct isert_conn *isert_conn) | |
574 | { | |
dac6ab30 | 575 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 576 | |
4c22e07f | 577 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 578 | |
57df81e3 SG |
579 | BUG_ON(!device); |
580 | ||
19e2090f | 581 | isert_free_rx_descriptors(isert_conn); |
63b268d2 RR |
582 | if (isert_conn->cm_id && |
583 | !isert_conn->dev_removed) | |
dac6ab30 | 584 | rdma_destroy_id(isert_conn->cm_id); |
19e2090f | 585 | |
dac6ab30 SG |
586 | if (isert_conn->qp) { |
587 | struct isert_comp *comp = isert_conn->qp->recv_cq->cq_context; | |
4a295bae | 588 | |
40fc069a | 589 | isert_comp_put(comp); |
dac6ab30 | 590 | ib_destroy_qp(isert_conn->qp); |
b8d26b3b NB |
591 | } |
592 | ||
5adabdd1 | 593 | if (isert_conn->login_req_buf) |
ae9ea9ed SG |
594 | isert_free_login_buf(isert_conn); |
595 | ||
57df81e3 | 596 | isert_device_put(device); |
b8d26b3b | 597 | |
63b268d2 RR |
598 | if (isert_conn->dev_removed) |
599 | wake_up_interruptible(&isert_conn->rem_wait); | |
600 | else | |
601 | kfree(isert_conn); | |
b8d26b3b NB |
602 | } |
603 | ||
604 | static void | |
605 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
606 | { | |
19e2090f | 607 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
bd379220 | 608 | struct isert_np *isert_np = cma_id->context; |
c2f88b17 | 609 | |
24f412dd | 610 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 611 | |
dac6ab30 | 612 | mutex_lock(&isert_conn->mutex); |
bd379220 JD |
613 | isert_conn->state = ISER_CONN_UP; |
614 | kref_get(&isert_conn->kref); | |
dac6ab30 | 615 | mutex_unlock(&isert_conn->mutex); |
bd379220 JD |
616 | |
617 | mutex_lock(&isert_np->mutex); | |
618 | list_move_tail(&isert_conn->node, &isert_np->pending); | |
619 | mutex_unlock(&isert_np->mutex); | |
620 | ||
621 | isert_info("np %p: Allow accept_np to continue\n", isert_np); | |
622 | up(&isert_np->sem); | |
b8d26b3b NB |
623 | } |
624 | ||
625 | static void | |
dac6ab30 | 626 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
627 | { |
628 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 629 | struct isert_conn, kref); |
b8d26b3b | 630 | |
4c22e07f SG |
631 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
632 | current->pid); | |
b8d26b3b NB |
633 | |
634 | isert_connect_release(isert_conn); | |
635 | } | |
636 | ||
637 | static void | |
638 | isert_put_conn(struct isert_conn *isert_conn) | |
639 | { | |
dac6ab30 | 640 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
641 | } |
642 | ||
6d1fba0c JD |
643 | static void |
644 | isert_handle_unbound_conn(struct isert_conn *isert_conn) | |
645 | { | |
646 | struct isert_np *isert_np = isert_conn->cm_id->context; | |
647 | ||
648 | mutex_lock(&isert_np->mutex); | |
649 | if (!list_empty(&isert_conn->node)) { | |
650 | /* | |
651 | * This means iscsi doesn't know this connection | |
652 | * so schedule a cleanup ourselves | |
653 | */ | |
654 | list_del_init(&isert_conn->node); | |
655 | isert_put_conn(isert_conn); | |
6d1fba0c JD |
656 | queue_work(isert_release_wq, &isert_conn->release_work); |
657 | } | |
658 | mutex_unlock(&isert_np->mutex); | |
659 | } | |
660 | ||
954f2372 SG |
661 | /** |
662 | * isert_conn_terminate() - Initiate connection termination | |
663 | * @isert_conn: isert connection struct | |
664 | * | |
665 | * Notes: | |
aea92980 | 666 | * In case the connection state is BOUND, move state |
954f2372 | 667 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 668 | * In case the connection state is UP, complete flush as well. |
954f2372 | 669 | * |
dac6ab30 | 670 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
671 | * safe to call multiple times. |
672 | */ | |
673 | static void | |
674 | isert_conn_terminate(struct isert_conn *isert_conn) | |
675 | { | |
676 | int err; | |
677 | ||
6d1fba0c JD |
678 | if (isert_conn->state >= ISER_CONN_TERMINATING) |
679 | return; | |
680 | ||
681 | isert_info("Terminating conn %p state %d\n", | |
682 | isert_conn, isert_conn->state); | |
683 | isert_conn->state = ISER_CONN_TERMINATING; | |
684 | err = rdma_disconnect(isert_conn->cm_id); | |
685 | if (err) | |
686 | isert_warn("Failed rdma_disconnect isert_conn %p\n", | |
687 | isert_conn); | |
954f2372 SG |
688 | } |
689 | ||
3b726ae2 | 690 | static int |
ca6c1d82 SG |
691 | isert_np_cma_handler(struct isert_np *isert_np, |
692 | enum rdma_cm_event_type event) | |
b8d26b3b | 693 | { |
ea8a1616 SG |
694 | isert_dbg("%s (%d): isert np %p\n", |
695 | rdma_event_msg(event), event, isert_np); | |
3b726ae2 | 696 | |
ca6c1d82 SG |
697 | switch (event) { |
698 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
ed8cb0a4 | 699 | isert_np->cm_id = NULL; |
ca6c1d82 SG |
700 | break; |
701 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
ed8cb0a4 JD |
702 | isert_np->cm_id = isert_setup_id(isert_np); |
703 | if (IS_ERR(isert_np->cm_id)) { | |
24f412dd | 704 | isert_err("isert np %p setup id failed: %ld\n", |
ed8cb0a4 JD |
705 | isert_np, PTR_ERR(isert_np->cm_id)); |
706 | isert_np->cm_id = NULL; | |
ca6c1d82 SG |
707 | } |
708 | break; | |
709 | default: | |
24f412dd | 710 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 711 | isert_np, event); |
3b726ae2 SG |
712 | } |
713 | ||
ca6c1d82 SG |
714 | return -1; |
715 | } | |
716 | ||
717 | static int | |
718 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
719 | enum rdma_cm_event_type event) | |
720 | { | |
f81bf458 | 721 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
ca6c1d82 | 722 | |
dac6ab30 | 723 | mutex_lock(&isert_conn->mutex); |
6d1fba0c JD |
724 | switch (isert_conn->state) { |
725 | case ISER_CONN_TERMINATING: | |
726 | break; | |
727 | case ISER_CONN_UP: | |
728 | isert_conn_terminate(isert_conn); | |
572a1434 | 729 | ib_drain_qp(isert_conn->qp); |
6d1fba0c JD |
730 | isert_handle_unbound_conn(isert_conn); |
731 | break; | |
732 | case ISER_CONN_BOUND: | |
733 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ | |
734 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
735 | break; | |
736 | default: | |
737 | isert_warn("conn %p teminating in state %d\n", | |
738 | isert_conn, isert_conn->state); | |
2f1b6b7d | 739 | } |
6d1fba0c | 740 | mutex_unlock(&isert_conn->mutex); |
2f1b6b7d | 741 | |
3b726ae2 | 742 | return 0; |
b8d26b3b NB |
743 | } |
744 | ||
4a579da2 | 745 | static int |
954f2372 SG |
746 | isert_connect_error(struct rdma_cm_id *cma_id) |
747 | { | |
19e2090f | 748 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
954f2372 | 749 | |
bd379220 | 750 | list_del_init(&isert_conn->node); |
dac6ab30 | 751 | isert_conn->cm_id = NULL; |
954f2372 | 752 | isert_put_conn(isert_conn); |
4a579da2 SG |
753 | |
754 | return -1; | |
954f2372 SG |
755 | } |
756 | ||
b8d26b3b NB |
757 | static int |
758 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
759 | { | |
f81bf458 | 760 | struct isert_np *isert_np = cma_id->context; |
63b268d2 | 761 | struct isert_conn *isert_conn; |
b8d26b3b NB |
762 | int ret = 0; |
763 | ||
ea8a1616 SG |
764 | isert_info("%s (%d): status %d id %p np %p\n", |
765 | rdma_event_msg(event->event), event->event, | |
4c22e07f | 766 | event->status, cma_id, cma_id->context); |
b8d26b3b | 767 | |
f81bf458 JD |
768 | if (isert_np->cm_id == cma_id) |
769 | return isert_np_cma_handler(cma_id->context, event->event); | |
770 | ||
b8d26b3b NB |
771 | switch (event->event) { |
772 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
b8d26b3b | 773 | ret = isert_connect_request(cma_id, event); |
3b726ae2 | 774 | if (ret) |
4c22e07f | 775 | isert_err("failed handle connect request %d\n", ret); |
b8d26b3b NB |
776 | break; |
777 | case RDMA_CM_EVENT_ESTABLISHED: | |
b8d26b3b NB |
778 | isert_connected_handler(cma_id); |
779 | break; | |
88c4015f SG |
780 | case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ |
781 | case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ | |
88c4015f | 782 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 783 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 784 | break; |
63b268d2 RR |
785 | case RDMA_CM_EVENT_DEVICE_REMOVAL: |
786 | isert_conn = cma_id->qp->qp_context; | |
787 | isert_conn->dev_removed = true; | |
788 | isert_disconnected_handler(cma_id, event->event); | |
789 | wait_event_interruptible(isert_conn->rem_wait, | |
790 | isert_conn->state == ISER_CONN_DOWN); | |
791 | kfree(isert_conn); | |
792 | /* | |
793 | * return non-zero from the callback to destroy | |
794 | * the rdma cm id | |
795 | */ | |
796 | return 1; | |
954f2372 SG |
797 | case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ |
798 | case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ | |
b8d26b3b | 799 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 800 | ret = isert_connect_error(cma_id); |
954f2372 | 801 | break; |
b8d26b3b | 802 | default: |
24f412dd | 803 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
804 | break; |
805 | } | |
806 | ||
b8d26b3b NB |
807 | return ret; |
808 | } | |
809 | ||
810 | static int | |
4366b19c | 811 | isert_post_recvm(struct isert_conn *isert_conn, u32 count) |
b8d26b3b NB |
812 | { |
813 | struct ib_recv_wr *rx_wr, *rx_wr_failed; | |
814 | int i, ret; | |
b8d26b3b NB |
815 | struct iser_rx_desc *rx_desc; |
816 | ||
dac6ab30 | 817 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
4366b19c | 818 | rx_desc = &isert_conn->rx_descs[i]; |
9679cc51 CH |
819 | |
820 | rx_wr->wr_cqe = &rx_desc->rx_cqe; | |
4366b19c JD |
821 | rx_wr->sg_list = &rx_desc->rx_sg; |
822 | rx_wr->num_sge = 1; | |
823 | rx_wr->next = rx_wr + 1; | |
b8d26b3b | 824 | } |
b8d26b3b NB |
825 | rx_wr--; |
826 | rx_wr->next = NULL; /* mark end of work requests list */ | |
827 | ||
dac6ab30 | 828 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, |
4366b19c | 829 | &rx_wr_failed); |
6d1fba0c | 830 | if (ret) |
24f412dd | 831 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
4366b19c JD |
832 | |
833 | return ret; | |
834 | } | |
835 | ||
836 | static int | |
837 | isert_post_recv(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc) | |
838 | { | |
839 | struct ib_recv_wr *rx_wr_failed, rx_wr; | |
840 | int ret; | |
841 | ||
9679cc51 | 842 | rx_wr.wr_cqe = &rx_desc->rx_cqe; |
4366b19c JD |
843 | rx_wr.sg_list = &rx_desc->rx_sg; |
844 | rx_wr.num_sge = 1; | |
845 | rx_wr.next = NULL; | |
846 | ||
4366b19c | 847 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_failed); |
6d1fba0c | 848 | if (ret) |
4366b19c | 849 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
4366b19c | 850 | |
b8d26b3b NB |
851 | return ret; |
852 | } | |
853 | ||
854 | static int | |
9679cc51 | 855 | isert_login_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) |
b8d26b3b | 856 | { |
dac6ab30 | 857 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
858 | struct ib_send_wr send_wr, *send_wr_failed; |
859 | int ret; | |
860 | ||
861 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
862 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
863 | ||
9679cc51 CH |
864 | tx_desc->tx_cqe.done = isert_login_send_done; |
865 | ||
b8d26b3b | 866 | send_wr.next = NULL; |
9679cc51 | 867 | send_wr.wr_cqe = &tx_desc->tx_cqe; |
b8d26b3b NB |
868 | send_wr.sg_list = tx_desc->tx_sg; |
869 | send_wr.num_sge = tx_desc->num_sge; | |
870 | send_wr.opcode = IB_WR_SEND; | |
871 | send_wr.send_flags = IB_SEND_SIGNALED; | |
872 | ||
dac6ab30 | 873 | ret = ib_post_send(isert_conn->qp, &send_wr, &send_wr_failed); |
bdf20e72 | 874 | if (ret) |
24f412dd | 875 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
876 | |
877 | return ret; | |
878 | } | |
879 | ||
880 | static void | |
881 | isert_create_send_desc(struct isert_conn *isert_conn, | |
882 | struct isert_cmd *isert_cmd, | |
883 | struct iser_tx_desc *tx_desc) | |
884 | { | |
dac6ab30 | 885 | struct isert_device *device = isert_conn->device; |
67cb3949 | 886 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
887 | |
888 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
889 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
890 | ||
d3cf81f9 SG |
891 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_ctrl)); |
892 | tx_desc->iser_header.flags = ISCSI_CTRL; | |
b8d26b3b NB |
893 | |
894 | tx_desc->num_sge = 1; | |
b8d26b3b | 895 | |
34efc7df JG |
896 | if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) { |
897 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; | |
24f412dd | 898 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
899 | } |
900 | } | |
901 | ||
902 | static int | |
903 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
904 | struct iser_tx_desc *tx_desc) | |
905 | { | |
dac6ab30 | 906 | struct isert_device *device = isert_conn->device; |
67cb3949 | 907 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
908 | u64 dma_addr; |
909 | ||
910 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
911 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
912 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 913 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
914 | return -ENOMEM; |
915 | } | |
916 | ||
917 | tx_desc->dma_addr = dma_addr; | |
918 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
919 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
34efc7df | 920 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; |
b8d26b3b | 921 | |
4c22e07f SG |
922 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
923 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
924 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
925 | |
926 | return 0; | |
927 | } | |
928 | ||
929 | static void | |
95b60f07 | 930 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 931 | struct ib_send_wr *send_wr) |
b8d26b3b | 932 | { |
95b60f07 NB |
933 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
934 | ||
9679cc51 CH |
935 | tx_desc->tx_cqe.done = isert_send_done; |
936 | send_wr->wr_cqe = &tx_desc->tx_cqe; | |
422bd0ac JD |
937 | |
938 | if (isert_conn->snd_w_inv && isert_cmd->inv_rkey) { | |
939 | send_wr->opcode = IB_WR_SEND_WITH_INV; | |
940 | send_wr->ex.invalidate_rkey = isert_cmd->inv_rkey; | |
941 | } else { | |
942 | send_wr->opcode = IB_WR_SEND; | |
943 | } | |
944 | ||
95b60f07 | 945 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 946 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 947 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
948 | } |
949 | ||
950 | static int | |
9679cc51 | 951 | isert_login_post_recv(struct isert_conn *isert_conn) |
b8d26b3b NB |
952 | { |
953 | struct ib_recv_wr rx_wr, *rx_wr_fail; | |
954 | struct ib_sge sge; | |
955 | int ret; | |
956 | ||
957 | memset(&sge, 0, sizeof(struct ib_sge)); | |
958 | sge.addr = isert_conn->login_req_dma; | |
ed1083b2 | 959 | sge.length = ISER_RX_PAYLOAD_SIZE; |
34efc7df | 960 | sge.lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b | 961 | |
24f412dd | 962 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
963 | sge.addr, sge.length, sge.lkey); |
964 | ||
9679cc51 CH |
965 | isert_conn->login_req_buf->rx_cqe.done = isert_login_recv_done; |
966 | ||
b8d26b3b | 967 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); |
9679cc51 | 968 | rx_wr.wr_cqe = &isert_conn->login_req_buf->rx_cqe; |
b8d26b3b NB |
969 | rx_wr.sg_list = &sge; |
970 | rx_wr.num_sge = 1; | |
971 | ||
dac6ab30 | 972 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_fail); |
6d1fba0c | 973 | if (ret) |
24f412dd | 974 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b | 975 | |
b8d26b3b NB |
976 | return ret; |
977 | } | |
978 | ||
979 | static int | |
980 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
981 | u32 length) | |
982 | { | |
983 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 984 | struct isert_device *device = isert_conn->device; |
67cb3949 | 985 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 986 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
987 | int ret; |
988 | ||
989 | isert_create_send_desc(isert_conn, NULL, tx_desc); | |
990 | ||
991 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
992 | sizeof(struct iscsi_hdr)); | |
993 | ||
994 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
995 | ||
996 | if (length > 0) { | |
997 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
998 | ||
999 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
1000 | length, DMA_TO_DEVICE); | |
1001 | ||
1002 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
1003 | ||
1004 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
1005 | length, DMA_TO_DEVICE); | |
1006 | ||
1007 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
1008 | tx_dsg->length = length; | |
34efc7df | 1009 | tx_dsg->lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b NB |
1010 | tx_desc->num_sge = 2; |
1011 | } | |
1012 | if (!login->login_failed) { | |
1013 | if (login->login_complete) { | |
1014 | ret = isert_alloc_rx_descriptors(isert_conn); | |
1015 | if (ret) | |
1016 | return ret; | |
1017 | ||
4366b19c JD |
1018 | ret = isert_post_recvm(isert_conn, |
1019 | ISERT_QP_MAX_RECV_DTOS); | |
b8d26b3b NB |
1020 | if (ret) |
1021 | return ret; | |
1022 | ||
128e9cc8 | 1023 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 1024 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 1025 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 1026 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
1027 | goto post_send; |
1028 | } | |
1029 | ||
9679cc51 | 1030 | ret = isert_login_post_recv(isert_conn); |
b8d26b3b NB |
1031 | if (ret) |
1032 | return ret; | |
1033 | } | |
1034 | post_send: | |
9679cc51 | 1035 | ret = isert_login_post_send(isert_conn, tx_desc); |
b8d26b3b NB |
1036 | if (ret) |
1037 | return ret; | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | static void | |
2371e5da | 1043 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 1044 | { |
5adabdd1 | 1045 | struct iser_rx_desc *rx_desc = isert_conn->login_req_buf; |
2371e5da | 1046 | int rx_buflen = isert_conn->login_req_len; |
b8d26b3b NB |
1047 | struct iscsi_conn *conn = isert_conn->conn; |
1048 | struct iscsi_login *login = conn->conn_login; | |
1049 | int size; | |
1050 | ||
24f412dd | 1051 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
1052 | |
1053 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
1054 | |
1055 | if (login->first_request) { | |
1056 | struct iscsi_login_req *login_req = | |
1057 | (struct iscsi_login_req *)&rx_desc->iscsi_header; | |
1058 | /* | |
1059 | * Setup the initial iscsi_login values from the leading | |
1060 | * login request PDU. | |
1061 | */ | |
1062 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
1063 | login->current_stage = | |
1064 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
1065 | >> 2; | |
1066 | login->version_min = login_req->min_version; | |
1067 | login->version_max = login_req->max_version; | |
1068 | memcpy(login->isid, login_req->isid, 6); | |
1069 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1070 | login->init_task_tag = login_req->itt; | |
1071 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1072 | login->cid = be16_to_cpu(login_req->cid); | |
1073 | login->tsih = be16_to_cpu(login_req->tsih); | |
1074 | } | |
1075 | ||
1076 | memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); | |
1077 | ||
1078 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1079 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1080 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1081 | MAX_KEY_VALUE_PAIRS); | |
b8d26b3b NB |
1082 | memcpy(login->req_buf, &rx_desc->data[0], size); |
1083 | ||
6faaa85f | 1084 | if (login->first_request) { |
dac6ab30 | 1085 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1086 | return; |
1087 | } | |
1088 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1089 | } |
1090 | ||
b8d26b3b | 1091 | static struct iscsi_cmd |
4366b19c | 1092 | *isert_allocate_cmd(struct iscsi_conn *conn, struct iser_rx_desc *rx_desc) |
b8d26b3b | 1093 | { |
6700425e | 1094 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1095 | struct isert_cmd *isert_cmd; |
d703ce2f | 1096 | struct iscsi_cmd *cmd; |
b8d26b3b | 1097 | |
676687c6 | 1098 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1099 | if (!cmd) { |
24f412dd | 1100 | isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); |
b8d26b3b NB |
1101 | return NULL; |
1102 | } | |
d703ce2f | 1103 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1104 | isert_cmd->conn = isert_conn; |
d703ce2f | 1105 | isert_cmd->iscsi_cmd = cmd; |
4366b19c | 1106 | isert_cmd->rx_desc = rx_desc; |
b8d26b3b | 1107 | |
d703ce2f | 1108 | return cmd; |
b8d26b3b NB |
1109 | } |
1110 | ||
1111 | static int | |
1112 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1113 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1114 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1115 | { |
b8d26b3b NB |
1116 | struct iscsi_conn *conn = isert_conn->conn; |
1117 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
b8d26b3b NB |
1118 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; |
1119 | bool dump_payload = false; | |
9fd60088 | 1120 | unsigned int data_len; |
b8d26b3b NB |
1121 | |
1122 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1123 | if (rc < 0) | |
1124 | return rc; | |
1125 | ||
1126 | imm_data = cmd->immediate_data; | |
1127 | imm_data_len = cmd->first_burst_len; | |
1128 | unsol_data = cmd->unsolicited_data; | |
9fd60088 | 1129 | data_len = cmd->se_cmd.data_length; |
b8d26b3b | 1130 | |
9fd60088 JD |
1131 | if (imm_data && imm_data_len == data_len) |
1132 | cmd->se_cmd.se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
b8d26b3b NB |
1133 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); |
1134 | if (rc < 0) { | |
1135 | return 0; | |
1136 | } else if (rc > 0) { | |
1137 | dump_payload = true; | |
1138 | goto sequence_cmd; | |
1139 | } | |
1140 | ||
1141 | if (!imm_data) | |
1142 | return 0; | |
1143 | ||
9fd60088 JD |
1144 | if (imm_data_len != data_len) { |
1145 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1146 | sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents, | |
1147 | &rx_desc->data[0], imm_data_len); | |
1148 | isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n", | |
1149 | sg_nents, imm_data_len); | |
1150 | } else { | |
1151 | sg_init_table(&isert_cmd->sg, 1); | |
1152 | cmd->se_cmd.t_data_sg = &isert_cmd->sg; | |
1153 | cmd->se_cmd.t_data_nents = 1; | |
1154 | sg_set_buf(&isert_cmd->sg, &rx_desc->data[0], imm_data_len); | |
1155 | isert_dbg("Transfer Immediate imm_data_len: %d\n", | |
1156 | imm_data_len); | |
1157 | } | |
b8d26b3b NB |
1158 | |
1159 | cmd->write_data_done += imm_data_len; | |
1160 | ||
1161 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1162 | spin_lock_bh(&cmd->istate_lock); | |
1163 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1164 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1165 | spin_unlock_bh(&cmd->istate_lock); | |
1166 | } | |
1167 | ||
1168 | sequence_cmd: | |
561bf158 | 1169 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b NB |
1170 | |
1171 | if (!rc && dump_payload == false && unsol_data) | |
1172 | iscsit_set_unsoliticed_dataout(cmd); | |
6cc44a6f | 1173 | else if (dump_payload && imm_data) |
afc16604 | 1174 | target_put_sess_cmd(&cmd->se_cmd); |
b8d26b3b | 1175 | |
b8d26b3b NB |
1176 | return 0; |
1177 | } | |
1178 | ||
1179 | static int | |
1180 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1181 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1182 | { | |
1183 | struct scatterlist *sg_start; | |
1184 | struct iscsi_conn *conn = isert_conn->conn; | |
1185 | struct iscsi_cmd *cmd = NULL; | |
1186 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1187 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1188 | int rc, sg_nents, sg_off, page_off; | |
1189 | ||
1190 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1191 | if (rc < 0) | |
1192 | return rc; | |
1193 | else if (!cmd) | |
1194 | return 0; | |
1195 | /* | |
1196 | * FIXME: Unexpected unsolicited_data out | |
1197 | */ | |
1198 | if (!cmd->unsolicited_data) { | |
24f412dd | 1199 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1200 | dump_stack(); |
1201 | return -1; | |
1202 | } | |
1203 | ||
4c22e07f SG |
1204 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1205 | "write_data_done: %u, data_length: %u\n", | |
1206 | unsol_data_len, cmd->write_data_done, | |
1207 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1208 | |
1209 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1210 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1211 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1212 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1213 | /* | |
1214 | * FIXME: Non page-aligned unsolicited_data out | |
1215 | */ | |
1216 | if (page_off) { | |
4c22e07f | 1217 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1218 | dump_stack(); |
1219 | return -1; | |
1220 | } | |
4c22e07f SG |
1221 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1222 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
1223 | sg_nents, &rx_desc->data[0], unsol_data_len); | |
b8d26b3b NB |
1224 | |
1225 | sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], | |
1226 | unsol_data_len); | |
1227 | ||
1228 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1229 | if (rc < 0) | |
1230 | return rc; | |
1231 | ||
4366b19c JD |
1232 | /* |
1233 | * multiple data-outs on the same command can arrive - | |
1234 | * so post the buffer before hand | |
1235 | */ | |
1236 | rc = isert_post_recv(isert_conn, rx_desc); | |
1237 | if (rc) { | |
1238 | isert_err("ib_post_recv failed with %d\n", rc); | |
1239 | return rc; | |
1240 | } | |
b8d26b3b NB |
1241 | return 0; |
1242 | } | |
1243 | ||
778de368 NB |
1244 | static int |
1245 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1246 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1247 | unsigned char *buf) | |
778de368 | 1248 | { |
778de368 NB |
1249 | struct iscsi_conn *conn = isert_conn->conn; |
1250 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1251 | int rc; | |
1252 | ||
1253 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1254 | if (rc < 0) | |
1255 | return rc; | |
1256 | /* | |
1257 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1258 | */ | |
1259 | ||
1260 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1261 | } | |
1262 | ||
adb54c29 NB |
1263 | static int |
1264 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1265 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1266 | struct iscsi_text *hdr) | |
adb54c29 | 1267 | { |
adb54c29 NB |
1268 | struct iscsi_conn *conn = isert_conn->conn; |
1269 | u32 payload_length = ntoh24(hdr->dlength); | |
1270 | int rc; | |
b44a2b67 | 1271 | unsigned char *text_in = NULL; |
adb54c29 NB |
1272 | |
1273 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1274 | if (rc < 0) | |
1275 | return rc; | |
1276 | ||
b44a2b67 SG |
1277 | if (payload_length) { |
1278 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
1279 | if (!text_in) { | |
1280 | isert_err("Unable to allocate text_in of payload_length: %u\n", | |
1281 | payload_length); | |
1282 | return -ENOMEM; | |
1283 | } | |
adb54c29 NB |
1284 | } |
1285 | cmd->text_in_ptr = text_in; | |
1286 | ||
1287 | memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); | |
1288 | ||
1289 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1290 | } | |
1291 | ||
b8d26b3b NB |
1292 | static int |
1293 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1294 | uint32_t read_stag, uint64_t read_va, | |
1295 | uint32_t write_stag, uint64_t write_va) | |
1296 | { | |
1297 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
1298 | struct iscsi_conn *conn = isert_conn->conn; | |
1299 | struct iscsi_cmd *cmd; | |
1300 | struct isert_cmd *isert_cmd; | |
1301 | int ret = -EINVAL; | |
1302 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1303 | ||
fb140271 | 1304 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1305 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1306 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1307 | " ignoring\n", opcode); |
ca40d24e NB |
1308 | return 0; |
1309 | } | |
1310 | ||
b8d26b3b NB |
1311 | switch (opcode) { |
1312 | case ISCSI_OP_SCSI_CMD: | |
4366b19c | 1313 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1314 | if (!cmd) |
1315 | break; | |
1316 | ||
d703ce2f | 1317 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1318 | isert_cmd->read_stag = read_stag; |
1319 | isert_cmd->read_va = read_va; | |
1320 | isert_cmd->write_stag = write_stag; | |
1321 | isert_cmd->write_va = write_va; | |
422bd0ac | 1322 | isert_cmd->inv_rkey = read_stag ? read_stag : write_stag; |
b8d26b3b | 1323 | |
d703ce2f | 1324 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1325 | rx_desc, (unsigned char *)hdr); |
1326 | break; | |
1327 | case ISCSI_OP_NOOP_OUT: | |
4366b19c | 1328 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1329 | if (!cmd) |
1330 | break; | |
1331 | ||
d703ce2f NB |
1332 | isert_cmd = iscsit_priv_cmd(cmd); |
1333 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1334 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1335 | break; |
1336 | case ISCSI_OP_SCSI_DATA_OUT: | |
1337 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1338 | (unsigned char *)hdr); | |
1339 | break; | |
1340 | case ISCSI_OP_SCSI_TMFUNC: | |
4366b19c | 1341 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1342 | if (!cmd) |
1343 | break; | |
1344 | ||
1345 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1346 | (unsigned char *)hdr); | |
1347 | break; | |
1348 | case ISCSI_OP_LOGOUT: | |
4366b19c | 1349 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1350 | if (!cmd) |
1351 | break; | |
1352 | ||
1353 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1354 | break; |
adb54c29 | 1355 | case ISCSI_OP_TEXT: |
4366b19c | 1356 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) |
e4f4e801 | 1357 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); |
4366b19c JD |
1358 | else |
1359 | cmd = isert_allocate_cmd(conn, rx_desc); | |
1360 | ||
1361 | if (!cmd) | |
1362 | break; | |
adb54c29 | 1363 | |
d703ce2f NB |
1364 | isert_cmd = iscsit_priv_cmd(cmd); |
1365 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1366 | rx_desc, (struct iscsi_text *)hdr); |
1367 | break; | |
b8d26b3b | 1368 | default: |
24f412dd | 1369 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1370 | dump_stack(); |
1371 | break; | |
1372 | } | |
1373 | ||
1374 | return ret; | |
1375 | } | |
1376 | ||
1377 | static void | |
9679cc51 | 1378 | isert_print_wc(struct ib_wc *wc, const char *type) |
b8d26b3b | 1379 | { |
9679cc51 CH |
1380 | if (wc->status != IB_WC_WR_FLUSH_ERR) |
1381 | isert_err("%s failure: %s (%d) vend_err %x\n", type, | |
1382 | ib_wc_status_msg(wc->status), wc->status, | |
1383 | wc->vendor_err); | |
1384 | else | |
1385 | isert_dbg("%s failure: %s (%d)\n", type, | |
1386 | ib_wc_status_msg(wc->status), wc->status); | |
1387 | } | |
1388 | ||
1389 | static void | |
1390 | isert_recv_done(struct ib_cq *cq, struct ib_wc *wc) | |
1391 | { | |
1392 | struct isert_conn *isert_conn = wc->qp->qp_context; | |
1393 | struct ib_device *ib_dev = isert_conn->cm_id->device; | |
1394 | struct iser_rx_desc *rx_desc = cqe_to_rx_desc(wc->wr_cqe); | |
1395 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
d3cf81f9 | 1396 | struct iser_ctrl *iser_ctrl = &rx_desc->iser_header; |
b8d26b3b NB |
1397 | uint64_t read_va = 0, write_va = 0; |
1398 | uint32_t read_stag = 0, write_stag = 0; | |
b8d26b3b | 1399 | |
9679cc51 CH |
1400 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1401 | isert_print_wc(wc, "recv"); | |
1402 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1403 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1404 | return; | |
1405 | } | |
1406 | ||
1407 | ib_dma_sync_single_for_cpu(ib_dev, rx_desc->dma_addr, | |
1408 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
1409 | ||
1410 | isert_dbg("DMA: 0x%llx, iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", | |
1411 | rx_desc->dma_addr, hdr->opcode, hdr->itt, hdr->flags, | |
1412 | (int)(wc->byte_len - ISER_HEADERS_LEN)); | |
1413 | ||
d3cf81f9 | 1414 | switch (iser_ctrl->flags & 0xF0) { |
b8d26b3b | 1415 | case ISCSI_CTRL: |
d3cf81f9 SG |
1416 | if (iser_ctrl->flags & ISER_RSV) { |
1417 | read_stag = be32_to_cpu(iser_ctrl->read_stag); | |
1418 | read_va = be64_to_cpu(iser_ctrl->read_va); | |
4c22e07f SG |
1419 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1420 | read_stag, (unsigned long long)read_va); | |
b8d26b3b | 1421 | } |
d3cf81f9 SG |
1422 | if (iser_ctrl->flags & ISER_WSV) { |
1423 | write_stag = be32_to_cpu(iser_ctrl->write_stag); | |
1424 | write_va = be64_to_cpu(iser_ctrl->write_va); | |
4c22e07f SG |
1425 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1426 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1427 | } |
1428 | ||
24f412dd | 1429 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1430 | break; |
1431 | case ISER_HELLO: | |
24f412dd | 1432 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1433 | break; |
1434 | default: | |
d3cf81f9 | 1435 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_ctrl->flags); |
b8d26b3b NB |
1436 | break; |
1437 | } | |
1438 | ||
6c760b3d BVA |
1439 | isert_rx_opcode(isert_conn, rx_desc, |
1440 | read_stag, read_va, write_stag, write_va); | |
9679cc51 CH |
1441 | |
1442 | ib_dma_sync_single_for_device(ib_dev, rx_desc->dma_addr, | |
1443 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
1444 | } |
1445 | ||
1446 | static void | |
9679cc51 | 1447 | isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1448 | { |
9679cc51 | 1449 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1450 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
9679cc51 CH |
1451 | |
1452 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
1453 | isert_print_wc(wc, "login recv"); | |
1454 | return; | |
b8d26b3b NB |
1455 | } |
1456 | ||
9679cc51 CH |
1457 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_req_dma, |
1458 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b | 1459 | |
9679cc51 | 1460 | isert_conn->login_req_len = wc->byte_len - ISER_HEADERS_LEN; |
b8d26b3b | 1461 | |
9679cc51 CH |
1462 | if (isert_conn->conn) { |
1463 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
2371e5da | 1464 | |
9679cc51 CH |
1465 | if (login && !login->first_request) |
1466 | isert_rx_login_req(isert_conn); | |
2371e5da | 1467 | } |
b8d26b3b | 1468 | |
9679cc51 CH |
1469 | mutex_lock(&isert_conn->mutex); |
1470 | complete(&isert_conn->login_req_comp); | |
1471 | mutex_unlock(&isert_conn->mutex); | |
b8d26b3b | 1472 | |
9679cc51 CH |
1473 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_req_dma, |
1474 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
1475 | } |
1476 | ||
1477 | static void | |
38a2d0d4 | 1478 | isert_rdma_rw_ctx_destroy(struct isert_cmd *cmd, struct isert_conn *conn) |
b8d26b3b | 1479 | { |
38a2d0d4 CH |
1480 | struct se_cmd *se_cmd = &cmd->iscsi_cmd->se_cmd; |
1481 | enum dma_data_direction dir = target_reverse_dma_direction(se_cmd); | |
b8d26b3b | 1482 | |
38a2d0d4 CH |
1483 | if (!cmd->rw.nr_ops) |
1484 | return; | |
59464ef4 | 1485 | |
38a2d0d4 CH |
1486 | if (isert_prot_cmd(conn, se_cmd)) { |
1487 | rdma_rw_ctx_destroy_signature(&cmd->rw, conn->qp, | |
1488 | conn->cm_id->port_num, se_cmd->t_data_sg, | |
1489 | se_cmd->t_data_nents, se_cmd->t_prot_sg, | |
1490 | se_cmd->t_prot_nents, dir); | |
1491 | } else { | |
1492 | rdma_rw_ctx_destroy(&cmd->rw, conn->qp, conn->cm_id->port_num, | |
1493 | se_cmd->t_data_sg, se_cmd->t_data_nents, dir); | |
59464ef4 VP |
1494 | } |
1495 | ||
38a2d0d4 | 1496 | cmd->rw.nr_ops = 0; |
59464ef4 VP |
1497 | } |
1498 | ||
b8d26b3b | 1499 | static void |
03e7848a | 1500 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1501 | { |
d703ce2f | 1502 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1503 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1504 | struct iscsi_conn *conn = isert_conn->conn; |
e4f4e801 | 1505 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1506 | |
4c22e07f | 1507 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1508 | |
1509 | switch (cmd->iscsi_opcode) { | |
1510 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1511 | spin_lock_bh(&conn->cmd_lock); |
1512 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1513 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1514 | spin_unlock_bh(&conn->cmd_lock); |
1515 | ||
03e7848a | 1516 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1517 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1518 | /* |
1519 | * Check for special case during comp_err where | |
1520 | * WRITE_PENDING has been handed off from core, | |
1521 | * but requires an extra target_put_sess_cmd() | |
1522 | * before transport_generic_free_cmd() below. | |
1523 | */ | |
1524 | if (comp_err && | |
1525 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1526 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1527 | ||
afc16604 | 1528 | target_put_sess_cmd(se_cmd); |
03e7848a NB |
1529 | } |
1530 | } | |
b8d26b3b | 1531 | |
38a2d0d4 | 1532 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
186a9647 NB |
1533 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1534 | break; | |
b8d26b3b | 1535 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1536 | spin_lock_bh(&conn->cmd_lock); |
1537 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1538 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1539 | spin_unlock_bh(&conn->cmd_lock); |
1540 | ||
b8d26b3b NB |
1541 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1542 | break; | |
1543 | case ISCSI_OP_REJECT: | |
1544 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1545 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1546 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1547 | /* If the continue bit is on, keep the command alive */ | |
1548 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1549 | break; | |
1550 | ||
b8d26b3b NB |
1551 | spin_lock_bh(&conn->cmd_lock); |
1552 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1553 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1554 | spin_unlock_bh(&conn->cmd_lock); |
1555 | ||
1556 | /* | |
1557 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1558 | * overwritten the original iscsi_opcode assignment, and the | |
1559 | * associated cmd->se_cmd needs to be released. | |
1560 | */ | |
1561 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1562 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1563 | cmd->iscsi_opcode); |
b8d26b3b NB |
1564 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1565 | break; | |
1566 | } | |
1567 | /* | |
1568 | * Fall-through | |
1569 | */ | |
1570 | default: | |
d703ce2f | 1571 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1572 | break; |
1573 | } | |
1574 | } | |
1575 | ||
1576 | static void | |
1577 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1578 | { | |
1579 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1580 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1581 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1582 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1583 | tx_desc->dma_addr = 0; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | static void | |
1588 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1589 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1590 | { |
dbbc5d11 | 1591 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1592 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1593 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1594 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1595 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1596 | } |
1597 | ||
1598 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1599 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1600 | } |
1601 | ||
96b7973e SG |
1602 | static int |
1603 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1604 | { | |
1605 | struct ib_mr_status mr_status; | |
1606 | int ret; | |
1607 | ||
1608 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1609 | if (ret) { | |
24f412dd | 1610 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1611 | goto fail_mr_status; |
1612 | } | |
1613 | ||
1614 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1615 | u64 sec_offset_err; | |
1616 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1617 | ||
1618 | switch (mr_status.sig_err.err_type) { | |
1619 | case IB_SIG_BAD_GUARD: | |
1620 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1621 | break; | |
1622 | case IB_SIG_BAD_REFTAG: | |
1623 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1624 | break; | |
1625 | case IB_SIG_BAD_APPTAG: | |
1626 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1627 | break; | |
1628 | } | |
1629 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1630 | do_div(sec_offset_err, block_size); | |
1631 | se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; | |
1632 | ||
4c22e07f SG |
1633 | isert_err("PI error found type %d at sector 0x%llx " |
1634 | "expected 0x%x vs actual 0x%x\n", | |
1635 | mr_status.sig_err.err_type, | |
1636 | (unsigned long long)se_cmd->bad_sector, | |
1637 | mr_status.sig_err.expected, | |
1638 | mr_status.sig_err.actual); | |
96b7973e SG |
1639 | ret = 1; |
1640 | } | |
1641 | ||
1642 | fail_mr_status: | |
1643 | return ret; | |
1644 | } | |
1645 | ||
f93f3a70 | 1646 | static void |
9679cc51 | 1647 | isert_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc) |
f93f3a70 | 1648 | { |
9679cc51 | 1649 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1650 | struct isert_device *device = isert_conn->device; |
9679cc51 | 1651 | struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe); |
e3416ab2 | 1652 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc); |
9679cc51 | 1653 | struct se_cmd *cmd = &isert_cmd->iscsi_cmd->se_cmd; |
9e961ae7 SG |
1654 | int ret = 0; |
1655 | ||
9679cc51 CH |
1656 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1657 | isert_print_wc(wc, "rdma write"); | |
1658 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1659 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1660 | isert_completion_put(desc, isert_cmd, device->ib_device, true); | |
1661 | return; | |
1662 | } | |
1663 | ||
1664 | isert_dbg("Cmd %p\n", isert_cmd); | |
1665 | ||
38a2d0d4 CH |
1666 | ret = isert_check_pi_status(cmd, isert_cmd->rw.sig->sig_mr); |
1667 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); | |
f93f3a70 | 1668 | |
9e961ae7 | 1669 | if (ret) |
9679cc51 | 1670 | transport_send_check_condition_and_sense(cmd, cmd->pi_err, 0); |
9e961ae7 | 1671 | else |
9679cc51 | 1672 | isert_put_response(isert_conn->conn, isert_cmd->iscsi_cmd); |
f93f3a70 SG |
1673 | } |
1674 | ||
b8d26b3b | 1675 | static void |
9679cc51 | 1676 | isert_rdma_read_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1677 | { |
9679cc51 CH |
1678 | struct isert_conn *isert_conn = wc->qp->qp_context; |
1679 | struct isert_device *device = isert_conn->device; | |
1680 | struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe); | |
e3416ab2 | 1681 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc); |
d703ce2f | 1682 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1683 | struct se_cmd *se_cmd = &cmd->se_cmd; |
5bac4b1a | 1684 | int ret = 0; |
b8d26b3b | 1685 | |
9679cc51 CH |
1686 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1687 | isert_print_wc(wc, "rdma read"); | |
1688 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1689 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1690 | isert_completion_put(desc, isert_cmd, device->ib_device, true); | |
1691 | return; | |
1692 | } | |
1693 | ||
1694 | isert_dbg("Cmd %p\n", isert_cmd); | |
1695 | ||
b8d26b3b | 1696 | iscsit_stop_dataout_timer(cmd); |
38a2d0d4 CH |
1697 | |
1698 | if (isert_prot_cmd(isert_conn, se_cmd)) | |
1699 | ret = isert_check_pi_status(se_cmd, isert_cmd->rw.sig->sig_mr); | |
1700 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); | |
1701 | cmd->write_data_done = 0; | |
b8d26b3b | 1702 | |
24f412dd | 1703 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1704 | spin_lock_bh(&cmd->istate_lock); |
1705 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1706 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1707 | spin_unlock_bh(&cmd->istate_lock); | |
1708 | ||
364189f0 | 1709 | if (ret) { |
afc16604 | 1710 | target_put_sess_cmd(se_cmd); |
5bac4b1a SG |
1711 | transport_send_check_condition_and_sense(se_cmd, |
1712 | se_cmd->pi_err, 0); | |
364189f0 | 1713 | } else { |
5bac4b1a | 1714 | target_execute_cmd(se_cmd); |
364189f0 | 1715 | } |
b8d26b3b NB |
1716 | } |
1717 | ||
1718 | static void | |
1719 | isert_do_control_comp(struct work_struct *work) | |
1720 | { | |
1721 | struct isert_cmd *isert_cmd = container_of(work, | |
1722 | struct isert_cmd, comp_work); | |
1723 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1724 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
d703ce2f | 1725 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1726 | |
4c22e07f SG |
1727 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1728 | ||
b8d26b3b NB |
1729 | switch (cmd->i_state) { |
1730 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1731 | iscsit_tmr_post_handler(cmd, cmd->conn); |
10633c37 SG |
1732 | case ISTATE_SEND_REJECT: /* FALLTHRU */ |
1733 | case ISTATE_SEND_TEXTRSP: /* FALLTHRU */ | |
b8d26b3b | 1734 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1735 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1736 | ib_dev, false); | |
3df8f68a | 1737 | break; |
b8d26b3b | 1738 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1739 | iscsit_logout_post_handler(cmd, cmd->conn); |
1740 | break; | |
1741 | default: | |
4c22e07f | 1742 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1743 | dump_stack(); |
1744 | break; | |
1745 | } | |
1746 | } | |
1747 | ||
1748 | static void | |
9679cc51 | 1749 | isert_login_send_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1750 | { |
9679cc51 CH |
1751 | struct isert_conn *isert_conn = wc->qp->qp_context; |
1752 | struct ib_device *ib_dev = isert_conn->cm_id->device; | |
1753 | struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe); | |
b8d26b3b | 1754 | |
9679cc51 CH |
1755 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1756 | isert_print_wc(wc, "login send"); | |
1757 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1758 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
b8d26b3b | 1759 | } |
897bb2c9 | 1760 | |
9679cc51 | 1761 | isert_unmap_tx_desc(tx_desc, ib_dev); |
b8d26b3b NB |
1762 | } |
1763 | ||
1764 | static void | |
9679cc51 | 1765 | isert_send_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1766 | { |
9679cc51 | 1767 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1768 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
9679cc51 | 1769 | struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe); |
e3416ab2 | 1770 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(tx_desc); |
b8d26b3b | 1771 | |
9679cc51 CH |
1772 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1773 | isert_print_wc(wc, "send"); | |
1774 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1775 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1776 | isert_completion_put(tx_desc, isert_cmd, ib_dev, true); | |
b8d26b3b NB |
1777 | return; |
1778 | } | |
b8d26b3b | 1779 | |
9679cc51 | 1780 | isert_dbg("Cmd %p\n", isert_cmd); |
4c22e07f | 1781 | |
9679cc51 CH |
1782 | switch (isert_cmd->iscsi_cmd->i_state) { |
1783 | case ISTATE_SEND_TASKMGTRSP: | |
1784 | case ISTATE_SEND_LOGOUTRSP: | |
1785 | case ISTATE_SEND_REJECT: | |
1786 | case ISTATE_SEND_TEXTRSP: | |
1787 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
1788 | ||
1789 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1790 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1791 | return; | |
b8d26b3b | 1792 | default: |
9679cc51 CH |
1793 | isert_cmd->iscsi_cmd->i_state = ISTATE_SENT_STATUS; |
1794 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); | |
b8d26b3b NB |
1795 | break; |
1796 | } | |
1797 | } | |
1798 | ||
b8d26b3b NB |
1799 | static int |
1800 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
1801 | { | |
1802 | struct ib_send_wr *wr_failed; | |
1803 | int ret; | |
1804 | ||
4366b19c JD |
1805 | ret = isert_post_recv(isert_conn, isert_cmd->rx_desc); |
1806 | if (ret) { | |
1807 | isert_err("ib_post_recv failed with %d\n", ret); | |
1808 | return ret; | |
1809 | } | |
1810 | ||
dac6ab30 | 1811 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, |
b8d26b3b NB |
1812 | &wr_failed); |
1813 | if (ret) { | |
24f412dd | 1814 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
1815 | return ret; |
1816 | } | |
1817 | return ret; | |
1818 | } | |
1819 | ||
1820 | static int | |
1821 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
1822 | { | |
d703ce2f | 1823 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1824 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1825 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1826 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
1827 | &isert_cmd->tx_desc.iscsi_header; | |
1828 | ||
1829 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1830 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
1831 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
1832 | /* | |
1833 | * Attach SENSE DATA payload to iSCSI Response PDU | |
1834 | */ | |
1835 | if (cmd->se_cmd.sense_buffer && | |
1836 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
1837 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 1838 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1839 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 1840 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 1841 | u32 padding, pdu_len; |
b8d26b3b NB |
1842 | |
1843 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
1844 | cmd->sense_buffer); | |
1845 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
1846 | ||
1847 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
1848 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 1849 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 1850 | |
dbbc5d11 NB |
1851 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
1852 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b NB |
1853 | DMA_TO_DEVICE); |
1854 | ||
dbbc5d11 NB |
1855 | isert_cmd->pdu_buf_len = pdu_len; |
1856 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
1857 | tx_dsg->length = pdu_len; | |
34efc7df | 1858 | tx_dsg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
1859 | isert_cmd->tx_desc.num_sge = 2; |
1860 | } | |
1861 | ||
68a86dee | 1862 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1863 | |
4c22e07f | 1864 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
1865 | |
1866 | return isert_post_response(isert_conn, isert_cmd); | |
1867 | } | |
1868 | ||
131e6abc NB |
1869 | static void |
1870 | isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
1871 | { | |
1872 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 1873 | struct isert_conn *isert_conn = conn->context; |
131e6abc NB |
1874 | |
1875 | spin_lock_bh(&conn->cmd_lock); | |
1876 | if (!list_empty(&cmd->i_conn_node)) | |
1877 | list_del_init(&cmd->i_conn_node); | |
1878 | spin_unlock_bh(&conn->cmd_lock); | |
1879 | ||
1880 | if (cmd->data_direction == DMA_TO_DEVICE) | |
1881 | iscsit_stop_dataout_timer(cmd); | |
38a2d0d4 | 1882 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
131e6abc NB |
1883 | } |
1884 | ||
e70beee7 NB |
1885 | static enum target_prot_op |
1886 | isert_get_sup_prot_ops(struct iscsi_conn *conn) | |
1887 | { | |
6700425e | 1888 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 1889 | struct isert_device *device = isert_conn->device; |
e70beee7 | 1890 | |
23a548ee SG |
1891 | if (conn->tpg->tpg_attrib.t10_pi) { |
1892 | if (device->pi_capable) { | |
24f412dd | 1893 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
1894 | isert_conn->pi_support = true; |
1895 | return TARGET_PROT_ALL; | |
1896 | } | |
1897 | } | |
1898 | ||
24f412dd | 1899 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 1900 | isert_conn->pi_support = false; |
e70beee7 NB |
1901 | |
1902 | return TARGET_PROT_NORMAL; | |
1903 | } | |
1904 | ||
b8d26b3b NB |
1905 | static int |
1906 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
1907 | bool nopout_response) | |
1908 | { | |
d703ce2f | 1909 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1910 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1911 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1912 | ||
1913 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1914 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
1915 | &isert_cmd->tx_desc.iscsi_header, | |
1916 | nopout_response); | |
1917 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1918 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1919 | |
4c22e07f | 1920 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
1921 | |
1922 | return isert_post_response(isert_conn, isert_cmd); | |
1923 | } | |
1924 | ||
1925 | static int | |
1926 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1927 | { | |
d703ce2f | 1928 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1929 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1930 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1931 | ||
1932 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1933 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
1934 | &isert_cmd->tx_desc.iscsi_header); | |
1935 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1936 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1937 | |
4c22e07f | 1938 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
1939 | |
1940 | return isert_post_response(isert_conn, isert_cmd); | |
1941 | } | |
1942 | ||
1943 | static int | |
1944 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1945 | { | |
d703ce2f | 1946 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1947 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1948 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1949 | ||
1950 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1951 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
1952 | &isert_cmd->tx_desc.iscsi_header); | |
1953 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1954 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1955 | |
4c22e07f | 1956 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
1957 | |
1958 | return isert_post_response(isert_conn, isert_cmd); | |
1959 | } | |
1960 | ||
1961 | static int | |
1962 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1963 | { | |
d703ce2f | 1964 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1965 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1966 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 1967 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1968 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
1969 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
1970 | struct iscsi_reject *hdr = | |
1971 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
1972 | |
1973 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 1974 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 1975 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
1976 | |
1977 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 1978 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
1979 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
1980 | DMA_TO_DEVICE); | |
dbbc5d11 NB |
1981 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
1982 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 1983 | tx_dsg->length = ISCSI_HDR_LEN; |
34efc7df | 1984 | tx_dsg->lkey = device->pd->local_dma_lkey; |
3df8f68a NB |
1985 | isert_cmd->tx_desc.num_sge = 2; |
1986 | ||
68a86dee | 1987 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1988 | |
4c22e07f | 1989 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
1990 | |
1991 | return isert_post_response(isert_conn, isert_cmd); | |
1992 | } | |
1993 | ||
adb54c29 NB |
1994 | static int |
1995 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1996 | { | |
d703ce2f | 1997 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1998 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
1999 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2000 | struct iscsi_text_rsp *hdr = | |
2001 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
2002 | u32 txt_rsp_len; | |
2003 | int rc; | |
2004 | ||
2005 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 2006 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
2007 | if (rc < 0) |
2008 | return rc; | |
2009 | ||
2010 | txt_rsp_len = rc; | |
2011 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2012 | ||
2013 | if (txt_rsp_len) { | |
dac6ab30 | 2014 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2015 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
2016 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2017 | void *txt_rsp_buf = cmd->buf_ptr; | |
2018 | ||
2019 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
2020 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
2021 | ||
2022 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
2023 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2024 | tx_dsg->length = txt_rsp_len; | |
34efc7df | 2025 | tx_dsg->lkey = device->pd->local_dma_lkey; |
adb54c29 NB |
2026 | isert_cmd->tx_desc.num_sge = 2; |
2027 | } | |
68a86dee | 2028 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 2029 | |
f64d2792 | 2030 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
2031 | |
2032 | return isert_post_response(isert_conn, isert_cmd); | |
2033 | } | |
2034 | ||
3d73cf1a SG |
2035 | static inline void |
2036 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, | |
2037 | struct ib_sig_domain *domain) | |
2038 | { | |
78eda2bb | 2039 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
2040 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
2041 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
2042 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
2043 | /* |
2044 | * At the moment we hard code those, but if in the future | |
2045 | * the target core would like to use it, we will take it | |
2046 | * from se_cmd. | |
2047 | */ | |
2048 | domain->sig.dif.apptag_check_mask = 0xffff; | |
2049 | domain->sig.dif.app_escape = true; | |
2050 | domain->sig.dif.ref_escape = true; | |
2051 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
2052 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
2053 | domain->sig.dif.ref_remap = true; | |
3d73cf1a SG |
2054 | }; |
2055 | ||
9e961ae7 SG |
2056 | static int |
2057 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2058 | { | |
38a2d0d4 CH |
2059 | memset(sig_attrs, 0, sizeof(*sig_attrs)); |
2060 | ||
9e961ae7 SG |
2061 | switch (se_cmd->prot_op) { |
2062 | case TARGET_PROT_DIN_INSERT: | |
2063 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2064 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2065 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
9e961ae7 SG |
2066 | break; |
2067 | case TARGET_PROT_DOUT_INSERT: | |
2068 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2069 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2070 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); |
9e961ae7 SG |
2071 | break; |
2072 | case TARGET_PROT_DIN_PASS: | |
2073 | case TARGET_PROT_DOUT_PASS: | |
3d73cf1a SG |
2074 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
2075 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); | |
9e961ae7 SG |
2076 | break; |
2077 | default: | |
24f412dd | 2078 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2079 | return -EINVAL; |
2080 | } | |
2081 | ||
38a2d0d4 CH |
2082 | sig_attrs->check_mask = |
2083 | (se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | | |
2084 | (se_cmd->prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | | |
2085 | (se_cmd->prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); | |
9e961ae7 SG |
2086 | return 0; |
2087 | } | |
2088 | ||
9e961ae7 | 2089 | static int |
38a2d0d4 CH |
2090 | isert_rdma_rw_ctx_post(struct isert_cmd *cmd, struct isert_conn *conn, |
2091 | struct ib_cqe *cqe, struct ib_send_wr *chain_wr) | |
2092 | { | |
2093 | struct se_cmd *se_cmd = &cmd->iscsi_cmd->se_cmd; | |
2094 | enum dma_data_direction dir = target_reverse_dma_direction(se_cmd); | |
2095 | u8 port_num = conn->cm_id->port_num; | |
2096 | u64 addr; | |
2097 | u32 rkey, offset; | |
9e961ae7 | 2098 | int ret; |
9e961ae7 | 2099 | |
38a2d0d4 CH |
2100 | if (dir == DMA_FROM_DEVICE) { |
2101 | addr = cmd->write_va; | |
2102 | rkey = cmd->write_stag; | |
2103 | offset = cmd->iscsi_cmd->write_data_done; | |
570db170 | 2104 | } else { |
38a2d0d4 CH |
2105 | addr = cmd->read_va; |
2106 | rkey = cmd->read_stag; | |
2107 | offset = 0; | |
570db170 | 2108 | } |
9e961ae7 | 2109 | |
38a2d0d4 CH |
2110 | if (isert_prot_cmd(conn, se_cmd)) { |
2111 | struct ib_sig_attrs sig_attrs; | |
59464ef4 | 2112 | |
38a2d0d4 CH |
2113 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); |
2114 | if (ret) | |
2115 | return ret; | |
9679cc51 | 2116 | |
38a2d0d4 CH |
2117 | WARN_ON_ONCE(offset); |
2118 | ret = rdma_rw_ctx_signature_init(&cmd->rw, conn->qp, port_num, | |
2119 | se_cmd->t_data_sg, se_cmd->t_data_nents, | |
2120 | se_cmd->t_prot_sg, se_cmd->t_prot_nents, | |
2121 | &sig_attrs, addr, rkey, dir); | |
59464ef4 | 2122 | } else { |
38a2d0d4 CH |
2123 | ret = rdma_rw_ctx_init(&cmd->rw, conn->qp, port_num, |
2124 | se_cmd->t_data_sg, se_cmd->t_data_nents, | |
2125 | offset, addr, rkey, dir); | |
59464ef4 | 2126 | } |
38a2d0d4 CH |
2127 | if (ret < 0) { |
2128 | isert_err("Cmd: %p failed to prepare RDMA res\n", cmd); | |
2129 | return ret; | |
59464ef4 VP |
2130 | } |
2131 | ||
38a2d0d4 CH |
2132 | ret = rdma_rw_ctx_post(&cmd->rw, conn->qp, port_num, cqe, chain_wr); |
2133 | if (ret < 0) | |
2134 | isert_err("Cmd: %p failed to post RDMA res\n", cmd); | |
59464ef4 VP |
2135 | return ret; |
2136 | } | |
2137 | ||
90ecc6e2 VP |
2138 | static int |
2139 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2140 | { | |
2141 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2142 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2143 | struct isert_conn *isert_conn = conn->context; |
38a2d0d4 CH |
2144 | struct ib_cqe *cqe = NULL; |
2145 | struct ib_send_wr *chain_wr = NULL; | |
90ecc6e2 VP |
2146 | int rc; |
2147 | ||
24f412dd | 2148 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2149 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2150 | |
38a2d0d4 CH |
2151 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
2152 | isert_cmd->tx_desc.tx_cqe.done = isert_rdma_write_done; | |
2153 | cqe = &isert_cmd->tx_desc.tx_cqe; | |
2154 | } else { | |
9e961ae7 SG |
2155 | /* |
2156 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2157 | */ | |
2158 | isert_create_send_desc(isert_conn, isert_cmd, | |
2159 | &isert_cmd->tx_desc); | |
2160 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2161 | &isert_cmd->tx_desc.iscsi_header); | |
2162 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2163 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2164 | &isert_cmd->tx_desc.send_wr); |
4366b19c JD |
2165 | |
2166 | rc = isert_post_recv(isert_conn, isert_cmd->rx_desc); | |
2167 | if (rc) { | |
2168 | isert_err("ib_post_recv failed with %d\n", rc); | |
2169 | return rc; | |
2170 | } | |
b8d26b3b | 2171 | |
38a2d0d4 CH |
2172 | chain_wr = &isert_cmd->tx_desc.send_wr; |
2173 | } | |
b8d26b3b | 2174 | |
38a2d0d4 CH |
2175 | isert_rdma_rw_ctx_post(isert_cmd, isert_conn, cqe, chain_wr); |
2176 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", isert_cmd); | |
90ecc6e2 | 2177 | return 1; |
b8d26b3b NB |
2178 | } |
2179 | ||
2180 | static int | |
2181 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2182 | { | |
d703ce2f | 2183 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 2184 | |
24f412dd | 2185 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
38a2d0d4 | 2186 | isert_cmd, cmd->se_cmd.data_length, cmd->write_data_done); |
b8d26b3b | 2187 | |
38a2d0d4 CH |
2188 | isert_cmd->tx_desc.tx_cqe.done = isert_rdma_read_done; |
2189 | isert_rdma_rw_ctx_post(isert_cmd, conn->context, | |
2190 | &isert_cmd->tx_desc.tx_cqe, NULL); | |
bdf20e72 | 2191 | |
24f412dd | 2192 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", |
90ecc6e2 | 2193 | isert_cmd); |
90ecc6e2 | 2194 | return 0; |
b8d26b3b NB |
2195 | } |
2196 | ||
2197 | static int | |
2198 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2199 | { | |
a4c15cd9 JD |
2200 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
2201 | int ret = 0; | |
b8d26b3b NB |
2202 | |
2203 | switch (state) { | |
a4c15cd9 JD |
2204 | case ISTATE_REMOVE: |
2205 | spin_lock_bh(&conn->cmd_lock); | |
2206 | list_del_init(&cmd->i_conn_node); | |
2207 | spin_unlock_bh(&conn->cmd_lock); | |
2208 | isert_put_cmd(isert_cmd, true); | |
2209 | break; | |
b8d26b3b NB |
2210 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: |
2211 | ret = isert_put_nopin(cmd, conn, false); | |
2212 | break; | |
2213 | default: | |
24f412dd | 2214 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
2215 | ret = -EINVAL; |
2216 | break; | |
2217 | } | |
2218 | ||
2219 | return ret; | |
2220 | } | |
2221 | ||
2222 | static int | |
2223 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2224 | { | |
991bb764 | 2225 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2226 | int ret; |
2227 | ||
2228 | switch (state) { | |
2229 | case ISTATE_SEND_LOGOUTRSP: | |
2230 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
2231 | if (!ret) |
2232 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
2233 | break; |
2234 | case ISTATE_SEND_NOPIN: | |
2235 | ret = isert_put_nopin(cmd, conn, true); | |
2236 | break; | |
2237 | case ISTATE_SEND_TASKMGTRSP: | |
2238 | ret = isert_put_tm_rsp(cmd, conn); | |
2239 | break; | |
2240 | case ISTATE_SEND_REJECT: | |
2241 | ret = isert_put_reject(cmd, conn); | |
2242 | break; | |
adb54c29 NB |
2243 | case ISTATE_SEND_TEXTRSP: |
2244 | ret = isert_put_text_rsp(cmd, conn); | |
2245 | break; | |
b8d26b3b NB |
2246 | case ISTATE_SEND_STATUS: |
2247 | /* | |
2248 | * Special case for sending non GOOD SCSI status from TX thread | |
2249 | * context during pre se_cmd excecution failure. | |
2250 | */ | |
2251 | ret = isert_put_response(conn, cmd); | |
2252 | break; | |
2253 | default: | |
24f412dd | 2254 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
2255 | ret = -EINVAL; |
2256 | break; | |
2257 | } | |
2258 | ||
2259 | return ret; | |
2260 | } | |
2261 | ||
ca6c1d82 SG |
2262 | struct rdma_cm_id * |
2263 | isert_setup_id(struct isert_np *isert_np) | |
2264 | { | |
2265 | struct iscsi_np *np = isert_np->np; | |
2266 | struct rdma_cm_id *id; | |
2267 | struct sockaddr *sa; | |
2268 | int ret; | |
2269 | ||
2270 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 2271 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 | 2272 | |
fa20105e | 2273 | id = rdma_create_id(&init_net, isert_cma_handler, isert_np, |
ca6c1d82 SG |
2274 | RDMA_PS_TCP, IB_QPT_RC); |
2275 | if (IS_ERR(id)) { | |
24f412dd | 2276 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
2277 | ret = PTR_ERR(id); |
2278 | goto out; | |
2279 | } | |
24f412dd | 2280 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 SG |
2281 | |
2282 | ret = rdma_bind_addr(id, sa); | |
2283 | if (ret) { | |
24f412dd | 2284 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
2285 | goto out_id; |
2286 | } | |
2287 | ||
992607e8 | 2288 | ret = rdma_listen(id, 0); |
ca6c1d82 | 2289 | if (ret) { |
24f412dd | 2290 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
2291 | goto out_id; |
2292 | } | |
2293 | ||
2294 | return id; | |
2295 | out_id: | |
2296 | rdma_destroy_id(id); | |
2297 | out: | |
2298 | return ERR_PTR(ret); | |
2299 | } | |
2300 | ||
b8d26b3b NB |
2301 | static int |
2302 | isert_setup_np(struct iscsi_np *np, | |
13a3cf08 | 2303 | struct sockaddr_storage *ksockaddr) |
b8d26b3b NB |
2304 | { |
2305 | struct isert_np *isert_np; | |
2306 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
2307 | int ret; |
2308 | ||
2309 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
2310 | if (!isert_np) { | |
24f412dd | 2311 | isert_err("Unable to allocate struct isert_np\n"); |
b8d26b3b NB |
2312 | return -ENOMEM; |
2313 | } | |
ed8cb0a4 JD |
2314 | sema_init(&isert_np->sem, 0); |
2315 | mutex_init(&isert_np->mutex); | |
bd379220 JD |
2316 | INIT_LIST_HEAD(&isert_np->accepted); |
2317 | INIT_LIST_HEAD(&isert_np->pending); | |
ca6c1d82 | 2318 | isert_np->np = np; |
b8d26b3b | 2319 | |
b8d26b3b NB |
2320 | /* |
2321 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
2322 | * in iscsi_target_configfs.c code.. | |
2323 | */ | |
2324 | memcpy(&np->np_sockaddr, ksockaddr, | |
13a3cf08 | 2325 | sizeof(struct sockaddr_storage)); |
b8d26b3b | 2326 | |
ca6c1d82 | 2327 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 2328 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
2329 | ret = PTR_ERR(isert_lid); |
2330 | goto out; | |
2331 | } | |
2332 | ||
ed8cb0a4 | 2333 | isert_np->cm_id = isert_lid; |
b8d26b3b | 2334 | np->np_context = isert_np; |
b8d26b3b NB |
2335 | |
2336 | return 0; | |
2337 | ||
b8d26b3b NB |
2338 | out: |
2339 | kfree(isert_np); | |
ca6c1d82 | 2340 | |
b8d26b3b NB |
2341 | return ret; |
2342 | } | |
2343 | ||
b8d26b3b NB |
2344 | static int |
2345 | isert_rdma_accept(struct isert_conn *isert_conn) | |
2346 | { | |
dac6ab30 | 2347 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
2348 | struct rdma_conn_param cp; |
2349 | int ret; | |
13bce482 | 2350 | struct iser_cm_hdr rsp_hdr; |
b8d26b3b NB |
2351 | |
2352 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
2353 | cp.initiator_depth = isert_conn->initiator_depth; |
2354 | cp.retry_count = 7; | |
2355 | cp.rnr_retry_count = 7; | |
2356 | ||
13bce482 | 2357 | memset(&rsp_hdr, 0, sizeof(rsp_hdr)); |
422bd0ac JD |
2358 | rsp_hdr.flags = ISERT_ZBVA_NOT_USED; |
2359 | if (!isert_conn->snd_w_inv) | |
2360 | rsp_hdr.flags = rsp_hdr.flags | ISERT_SEND_W_INV_NOT_USED; | |
13bce482 JD |
2361 | cp.private_data = (void *)&rsp_hdr; |
2362 | cp.private_data_len = sizeof(rsp_hdr); | |
2363 | ||
b8d26b3b NB |
2364 | ret = rdma_accept(cm_id, &cp); |
2365 | if (ret) { | |
24f412dd | 2366 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
2367 | return ret; |
2368 | } | |
2369 | ||
b8d26b3b NB |
2370 | return 0; |
2371 | } | |
2372 | ||
2373 | static int | |
2374 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
2375 | { | |
6700425e | 2376 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2377 | int ret; |
2378 | ||
24f412dd | 2379 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
2380 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
2381 | if (ret) { | |
24f412dd | 2382 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
2383 | isert_conn); |
2384 | return ret; | |
2385 | } | |
2386 | reinit_completion(&isert_conn->login_req_comp); | |
2387 | ||
6faaa85f NB |
2388 | /* |
2389 | * For login requests after the first PDU, isert_rx_login_req() will | |
2390 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
2391 | * received, which turns this callback from iscsi_target_do_login_rx() | |
2392 | * into a NOP. | |
2393 | */ | |
2394 | if (!login->first_request) | |
2395 | return 0; | |
b8d26b3b | 2396 | |
2371e5da SG |
2397 | isert_rx_login_req(isert_conn); |
2398 | ||
dac6ab30 SG |
2399 | isert_info("before login_comp conn: %p\n", conn); |
2400 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
2401 | if (ret) |
2402 | return ret; | |
2403 | ||
24f412dd | 2404 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 2405 | |
b8d26b3b NB |
2406 | return 0; |
2407 | } | |
2408 | ||
2409 | static void | |
2410 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
2411 | struct isert_conn *isert_conn) | |
2412 | { | |
dac6ab30 | 2413 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b | 2414 | struct rdma_route *cm_route = &cm_id->route; |
b8d26b3b NB |
2415 | |
2416 | conn->login_family = np->np_sockaddr.ss_family; | |
2417 | ||
dc58f760 AG |
2418 | conn->login_sockaddr = cm_route->addr.dst_addr; |
2419 | conn->local_sockaddr = cm_route->addr.src_addr; | |
b8d26b3b NB |
2420 | } |
2421 | ||
2422 | static int | |
2423 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
2424 | { | |
6700425e | 2425 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 2426 | struct isert_conn *isert_conn; |
c6b8e918 | 2427 | int ret; |
b8d26b3b NB |
2428 | |
2429 | accept_wait: | |
ed8cb0a4 | 2430 | ret = down_interruptible(&isert_np->sem); |
c6b8e918 | 2431 | if (ret) |
b8d26b3b NB |
2432 | return -ENODEV; |
2433 | ||
2434 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 2435 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 2436 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 2437 | isert_dbg("np_thread_state %d\n", |
e346ab34 SG |
2438 | np->np_thread_state); |
2439 | /** | |
2440 | * No point in stalling here when np_thread | |
2441 | * is in state RESET/SHUTDOWN/EXIT - bail | |
2442 | **/ | |
b8d26b3b NB |
2443 | return -ENODEV; |
2444 | } | |
2445 | spin_unlock_bh(&np->np_thread_lock); | |
2446 | ||
ed8cb0a4 | 2447 | mutex_lock(&isert_np->mutex); |
bd379220 | 2448 | if (list_empty(&isert_np->pending)) { |
ed8cb0a4 | 2449 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
2450 | goto accept_wait; |
2451 | } | |
bd379220 JD |
2452 | isert_conn = list_first_entry(&isert_np->pending, |
2453 | struct isert_conn, node); | |
2454 | list_del_init(&isert_conn->node); | |
ed8cb0a4 | 2455 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
2456 | |
2457 | conn->context = isert_conn; | |
2458 | isert_conn->conn = conn; | |
aea92980 | 2459 | isert_conn->state = ISER_CONN_BOUND; |
b8d26b3b | 2460 | |
b8d26b3b NB |
2461 | isert_set_conn_info(np, conn, isert_conn); |
2462 | ||
24f412dd | 2463 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 2464 | |
b8d26b3b NB |
2465 | return 0; |
2466 | } | |
2467 | ||
2468 | static void | |
2469 | isert_free_np(struct iscsi_np *np) | |
2470 | { | |
6700425e | 2471 | struct isert_np *isert_np = np->np_context; |
268e6811 | 2472 | struct isert_conn *isert_conn, *n; |
b8d26b3b | 2473 | |
ed8cb0a4 JD |
2474 | if (isert_np->cm_id) |
2475 | rdma_destroy_id(isert_np->cm_id); | |
b8d26b3b | 2476 | |
268e6811 SG |
2477 | /* |
2478 | * FIXME: At this point we don't have a good way to insure | |
2479 | * that at this point we don't have hanging connections that | |
2480 | * completed RDMA establishment but didn't start iscsi login | |
2481 | * process. So work-around this by cleaning up what ever piled | |
bd379220 | 2482 | * up in accepted and pending lists. |
268e6811 | 2483 | */ |
ed8cb0a4 | 2484 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
2485 | if (!list_empty(&isert_np->pending)) { |
2486 | isert_info("Still have isert pending connections\n"); | |
2487 | list_for_each_entry_safe(isert_conn, n, | |
2488 | &isert_np->pending, | |
2489 | node) { | |
2490 | isert_info("cleaning isert_conn %p state (%d)\n", | |
2491 | isert_conn, isert_conn->state); | |
2492 | isert_connect_release(isert_conn); | |
2493 | } | |
2494 | } | |
2495 | ||
2496 | if (!list_empty(&isert_np->accepted)) { | |
2497 | isert_info("Still have isert accepted connections\n"); | |
268e6811 | 2498 | list_for_each_entry_safe(isert_conn, n, |
bd379220 JD |
2499 | &isert_np->accepted, |
2500 | node) { | |
24f412dd | 2501 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 SG |
2502 | isert_conn, isert_conn->state); |
2503 | isert_connect_release(isert_conn); | |
2504 | } | |
2505 | } | |
ed8cb0a4 | 2506 | mutex_unlock(&isert_np->mutex); |
268e6811 | 2507 | |
b8d26b3b NB |
2508 | np->np_context = NULL; |
2509 | kfree(isert_np); | |
2510 | } | |
2511 | ||
b02efbfc SG |
2512 | static void isert_release_work(struct work_struct *work) |
2513 | { | |
2514 | struct isert_conn *isert_conn = container_of(work, | |
2515 | struct isert_conn, | |
2516 | release_work); | |
2517 | ||
24f412dd | 2518 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 2519 | |
dac6ab30 | 2520 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 2521 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 2522 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 2523 | |
24f412dd | 2524 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
2525 | isert_put_conn(isert_conn); |
2526 | } | |
2527 | ||
991bb764 SG |
2528 | static void |
2529 | isert_wait4logout(struct isert_conn *isert_conn) | |
2530 | { | |
2531 | struct iscsi_conn *conn = isert_conn->conn; | |
2532 | ||
4c22e07f SG |
2533 | isert_info("conn %p\n", isert_conn); |
2534 | ||
991bb764 | 2535 | if (isert_conn->logout_posted) { |
24f412dd | 2536 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
2537 | wait_for_completion_timeout(&conn->conn_logout_comp, |
2538 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
2539 | } | |
2540 | } | |
2541 | ||
c7e160ee SG |
2542 | static void |
2543 | isert_wait4cmds(struct iscsi_conn *conn) | |
2544 | { | |
4c22e07f SG |
2545 | isert_info("iscsi_conn %p\n", conn); |
2546 | ||
c7e160ee SG |
2547 | if (conn->sess) { |
2548 | target_sess_cmd_list_set_waiting(conn->sess->se_sess); | |
2549 | target_wait_for_sess_cmds(conn->sess->se_sess); | |
2550 | } | |
2551 | } | |
2552 | ||
3e03c4b0 JD |
2553 | /** |
2554 | * isert_put_unsol_pending_cmds() - Drop commands waiting for | |
2555 | * unsolicitate dataout | |
2556 | * @conn: iscsi connection | |
2557 | * | |
2558 | * We might still have commands that are waiting for unsolicited | |
2559 | * dataouts messages. We must put the extra reference on those | |
2560 | * before blocking on the target_wait_for_session_cmds | |
2561 | */ | |
2562 | static void | |
2563 | isert_put_unsol_pending_cmds(struct iscsi_conn *conn) | |
2564 | { | |
2565 | struct iscsi_cmd *cmd, *tmp; | |
2566 | static LIST_HEAD(drop_cmd_list); | |
2567 | ||
2568 | spin_lock_bh(&conn->cmd_lock); | |
2569 | list_for_each_entry_safe(cmd, tmp, &conn->conn_cmd_list, i_conn_node) { | |
2570 | if ((cmd->cmd_flags & ICF_NON_IMMEDIATE_UNSOLICITED_DATA) && | |
2571 | (cmd->write_data_done < conn->sess->sess_ops->FirstBurstLength) && | |
2572 | (cmd->write_data_done < cmd->se_cmd.data_length)) | |
2573 | list_move_tail(&cmd->i_conn_node, &drop_cmd_list); | |
2574 | } | |
2575 | spin_unlock_bh(&conn->cmd_lock); | |
2576 | ||
2577 | list_for_each_entry_safe(cmd, tmp, &drop_cmd_list, i_conn_node) { | |
2578 | list_del_init(&cmd->i_conn_node); | |
2579 | if (cmd->i_state != ISTATE_REMOVE) { | |
2580 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
2581 | ||
2582 | isert_info("conn %p dropping cmd %p\n", conn, cmd); | |
2583 | isert_put_cmd(isert_cmd, true); | |
2584 | } | |
2585 | } | |
2586 | } | |
2587 | ||
defd8848 | 2588 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
2589 | { |
2590 | struct isert_conn *isert_conn = conn->context; | |
2591 | ||
4c22e07f | 2592 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 2593 | |
dac6ab30 | 2594 | mutex_lock(&isert_conn->mutex); |
954f2372 | 2595 | isert_conn_terminate(isert_conn); |
dac6ab30 | 2596 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 2597 | |
572a1434 | 2598 | ib_drain_qp(isert_conn->qp); |
3e03c4b0 JD |
2599 | isert_put_unsol_pending_cmds(conn); |
2600 | isert_wait4cmds(conn); | |
991bb764 | 2601 | isert_wait4logout(isert_conn); |
954f2372 | 2602 | |
b02efbfc | 2603 | queue_work(isert_release_wq, &isert_conn->release_work); |
defd8848 NB |
2604 | } |
2605 | ||
2606 | static void isert_free_conn(struct iscsi_conn *conn) | |
2607 | { | |
2608 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b | 2609 | |
572a1434 | 2610 | ib_drain_qp(isert_conn->qp); |
b8d26b3b NB |
2611 | isert_put_conn(isert_conn); |
2612 | } | |
2613 | ||
187e84f7 VP |
2614 | static void isert_get_rx_pdu(struct iscsi_conn *conn) |
2615 | { | |
2616 | struct completion comp; | |
2617 | ||
2618 | init_completion(&comp); | |
2619 | ||
2620 | wait_for_completion_interruptible(&comp); | |
2621 | } | |
2622 | ||
b8d26b3b NB |
2623 | static struct iscsit_transport iser_target_transport = { |
2624 | .name = "IB/iSER", | |
2625 | .transport_type = ISCSI_INFINIBAND, | |
bd027d85 | 2626 | .rdma_shutdown = true, |
d703ce2f | 2627 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
2628 | .owner = THIS_MODULE, |
2629 | .iscsit_setup_np = isert_setup_np, | |
2630 | .iscsit_accept_np = isert_accept_np, | |
2631 | .iscsit_free_np = isert_free_np, | |
defd8848 | 2632 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 2633 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
2634 | .iscsit_get_login_rx = isert_get_login_rx, |
2635 | .iscsit_put_login_tx = isert_put_login_tx, | |
2636 | .iscsit_immediate_queue = isert_immediate_queue, | |
2637 | .iscsit_response_queue = isert_response_queue, | |
2638 | .iscsit_get_dataout = isert_get_dataout, | |
2639 | .iscsit_queue_data_in = isert_put_datain, | |
2640 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 2641 | .iscsit_aborted_task = isert_aborted_task, |
187e84f7 | 2642 | .iscsit_get_rx_pdu = isert_get_rx_pdu, |
e70beee7 | 2643 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
2644 | }; |
2645 | ||
2646 | static int __init isert_init(void) | |
2647 | { | |
2648 | int ret; | |
2649 | ||
631af550 SG |
2650 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
2651 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 2652 | if (!isert_comp_wq) { |
24f412dd | 2653 | isert_err("Unable to allocate isert_comp_wq\n"); |
b8d26b3b | 2654 | ret = -ENOMEM; |
6f0fae3d | 2655 | return -ENOMEM; |
b8d26b3b NB |
2656 | } |
2657 | ||
b02efbfc SG |
2658 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
2659 | WQ_UNBOUND_MAX_ACTIVE); | |
2660 | if (!isert_release_wq) { | |
24f412dd | 2661 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
2662 | ret = -ENOMEM; |
2663 | goto destroy_comp_wq; | |
2664 | } | |
2665 | ||
b8d26b3b | 2666 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 2667 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 2668 | |
b8d26b3b NB |
2669 | return 0; |
2670 | ||
b02efbfc SG |
2671 | destroy_comp_wq: |
2672 | destroy_workqueue(isert_comp_wq); | |
6f0fae3d | 2673 | |
b8d26b3b NB |
2674 | return ret; |
2675 | } | |
2676 | ||
2677 | static void __exit isert_exit(void) | |
2678 | { | |
f5ebec96 | 2679 | flush_scheduled_work(); |
b02efbfc | 2680 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 2681 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 2682 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 2683 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
b8d26b3b NB |
2684 | } |
2685 | ||
2686 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
9e35eff4 | 2687 | MODULE_VERSION("1.0"); |
b8d26b3b NB |
2688 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
2689 | MODULE_LICENSE("GPL"); | |
2690 | ||
2691 | module_init(isert_init); | |
2692 | module_exit(isert_exit); |