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