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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) |
93b80f29 | 187 | return -ENOMEM; |
b8d26b3b | 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; | |
4c22e07f | 216 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
b8d26b3b NB |
217 | return -ENOMEM; |
218 | } | |
219 | ||
220 | static void | |
221 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
222 | { | |
dac6ab30 | 223 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
224 | struct iser_rx_desc *rx_desc; |
225 | int i; | |
226 | ||
dac6ab30 | 227 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
228 | return; |
229 | ||
dac6ab30 | 230 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
231 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
232 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
233 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
234 | } | |
235 | ||
dac6ab30 SG |
236 | kfree(isert_conn->rx_descs); |
237 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
238 | } |
239 | ||
172369c5 SG |
240 | static void |
241 | isert_free_comps(struct isert_device *device) | |
b8d26b3b | 242 | { |
172369c5 | 243 | int i; |
59464ef4 | 244 | |
172369c5 SG |
245 | for (i = 0; i < device->comps_used; i++) { |
246 | struct isert_comp *comp = &device->comps[i]; | |
b1a5ad00 | 247 | |
9679cc51 CH |
248 | if (comp->cq) |
249 | ib_free_cq(comp->cq); | |
59464ef4 | 250 | } |
172369c5 SG |
251 | kfree(device->comps); |
252 | } | |
d40945d8 | 253 | |
172369c5 | 254 | static int |
4a061b28 | 255 | isert_alloc_comps(struct isert_device *device) |
172369c5 SG |
256 | { |
257 | int i, max_cqe, ret = 0; | |
d3e125da | 258 | |
4a295bae | 259 | device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), |
172369c5 SG |
260 | device->ib_device->num_comp_vectors)); |
261 | ||
24f412dd | 262 | isert_info("Using %d CQs, %s supports %d vectors support " |
38a2d0d4 | 263 | "pi_capable %d\n", |
4a295bae | 264 | device->comps_used, device->ib_device->name, |
38a2d0d4 | 265 | device->ib_device->num_comp_vectors, |
4a295bae SG |
266 | device->pi_capable); |
267 | ||
268 | device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), | |
269 | GFP_KERNEL); | |
93b80f29 | 270 | if (!device->comps) |
b8d26b3b | 271 | return -ENOMEM; |
4a295bae | 272 | |
4a061b28 | 273 | max_cqe = min(ISER_MAX_CQ_LEN, device->ib_device->attrs.max_cqe); |
172369c5 | 274 | |
4a295bae SG |
275 | for (i = 0; i < device->comps_used; i++) { |
276 | struct isert_comp *comp = &device->comps[i]; | |
277 | ||
278 | comp->device = device; | |
9679cc51 CH |
279 | comp->cq = ib_alloc_cq(device->ib_device, comp, max_cqe, i, |
280 | IB_POLL_WORKQUEUE); | |
6f0fae3d | 281 | if (IS_ERR(comp->cq)) { |
172369c5 | 282 | isert_err("Unable to allocate cq\n"); |
6f0fae3d SG |
283 | ret = PTR_ERR(comp->cq); |
284 | comp->cq = NULL; | |
b8d26b3b | 285 | goto out_cq; |
94a71110 | 286 | } |
b8d26b3b NB |
287 | } |
288 | ||
172369c5 SG |
289 | return 0; |
290 | out_cq: | |
291 | isert_free_comps(device); | |
292 | return ret; | |
293 | } | |
294 | ||
295 | static int | |
296 | isert_create_device_ib_res(struct isert_device *device) | |
297 | { | |
4a061b28 | 298 | struct ib_device *ib_dev = device->ib_device; |
fd8205e8 | 299 | int ret; |
172369c5 | 300 | |
4a061b28 OG |
301 | isert_dbg("devattr->max_sge: %d\n", ib_dev->attrs.max_sge); |
302 | isert_dbg("devattr->max_sge_rd: %d\n", ib_dev->attrs.max_sge_rd); | |
172369c5 | 303 | |
4a061b28 | 304 | ret = isert_alloc_comps(device); |
172369c5 | 305 | if (ret) |
373a4cd7 | 306 | goto out; |
172369c5 | 307 | |
ed082d36 | 308 | device->pd = ib_alloc_pd(ib_dev, 0); |
67cb3949 SG |
309 | if (IS_ERR(device->pd)) { |
310 | ret = PTR_ERR(device->pd); | |
311 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
312 | device, ret); | |
313 | goto out_cq; | |
314 | } | |
315 | ||
172369c5 | 316 | /* Check signature cap */ |
4a061b28 | 317 | device->pi_capable = ib_dev->attrs.device_cap_flags & |
172369c5 | 318 | IB_DEVICE_SIGNATURE_HANDOVER ? true : false; |
67cb3949 | 319 | |
b8d26b3b NB |
320 | return 0; |
321 | ||
322 | out_cq: | |
172369c5 | 323 | isert_free_comps(device); |
373a4cd7 NB |
324 | out: |
325 | if (ret > 0) | |
326 | ret = -EINVAL; | |
b8d26b3b NB |
327 | return ret; |
328 | } | |
329 | ||
330 | static void | |
331 | isert_free_device_ib_res(struct isert_device *device) | |
332 | { | |
24f412dd | 333 | isert_info("device %p\n", device); |
b8d26b3b | 334 | |
67cb3949 | 335 | ib_dealloc_pd(device->pd); |
172369c5 | 336 | isert_free_comps(device); |
b8d26b3b NB |
337 | } |
338 | ||
339 | static void | |
cf8ae958 | 340 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
341 | { |
342 | mutex_lock(&device_list_mutex); | |
343 | device->refcount--; | |
4c22e07f | 344 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
345 | if (!device->refcount) { |
346 | isert_free_device_ib_res(device); | |
347 | list_del(&device->dev_node); | |
348 | kfree(device); | |
349 | } | |
350 | mutex_unlock(&device_list_mutex); | |
351 | } | |
352 | ||
353 | static struct isert_device * | |
cf8ae958 | 354 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
355 | { |
356 | struct isert_device *device; | |
357 | int ret; | |
358 | ||
359 | mutex_lock(&device_list_mutex); | |
360 | list_for_each_entry(device, &device_list, dev_node) { | |
361 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
362 | device->refcount++; | |
4c22e07f SG |
363 | isert_info("Found iser device %p refcount %d\n", |
364 | device, device->refcount); | |
b8d26b3b NB |
365 | mutex_unlock(&device_list_mutex); |
366 | return device; | |
367 | } | |
368 | } | |
369 | ||
370 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
371 | if (!device) { | |
372 | mutex_unlock(&device_list_mutex); | |
373 | return ERR_PTR(-ENOMEM); | |
374 | } | |
375 | ||
376 | INIT_LIST_HEAD(&device->dev_node); | |
377 | ||
378 | device->ib_device = cma_id->device; | |
379 | ret = isert_create_device_ib_res(device); | |
380 | if (ret) { | |
381 | kfree(device); | |
382 | mutex_unlock(&device_list_mutex); | |
383 | return ERR_PTR(ret); | |
384 | } | |
385 | ||
386 | device->refcount++; | |
387 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
388 | isert_info("Created a new iser device %p refcount %d\n", |
389 | device, device->refcount); | |
b8d26b3b NB |
390 | mutex_unlock(&device_list_mutex); |
391 | ||
392 | return device; | |
393 | } | |
394 | ||
ae9ea9ed SG |
395 | static void |
396 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 397 | { |
b8d26b3b | 398 | isert_conn->state = ISER_CONN_INIT; |
bd379220 | 399 | INIT_LIST_HEAD(&isert_conn->node); |
dac6ab30 | 400 | init_completion(&isert_conn->login_comp); |
2371e5da | 401 | init_completion(&isert_conn->login_req_comp); |
63b268d2 | 402 | init_waitqueue_head(&isert_conn->rem_wait); |
dac6ab30 SG |
403 | kref_init(&isert_conn->kref); |
404 | mutex_init(&isert_conn->mutex); | |
2f1b6b7d | 405 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
ae9ea9ed | 406 | } |
b8d26b3b | 407 | |
ae9ea9ed SG |
408 | static void |
409 | isert_free_login_buf(struct isert_conn *isert_conn) | |
410 | { | |
dac6ab30 | 411 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
412 | |
413 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
ed1083b2 | 414 | ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE); |
5adabdd1 CH |
415 | kfree(isert_conn->login_rsp_buf); |
416 | ||
ae9ea9ed | 417 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, |
5adabdd1 | 418 | ISER_RX_PAYLOAD_SIZE, |
ae9ea9ed | 419 | DMA_FROM_DEVICE); |
5adabdd1 | 420 | kfree(isert_conn->login_req_buf); |
ae9ea9ed SG |
421 | } |
422 | ||
423 | static int | |
424 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
425 | struct ib_device *ib_dev) | |
426 | { | |
427 | int ret; | |
b8d26b3b | 428 | |
5adabdd1 CH |
429 | isert_conn->login_req_buf = kzalloc(sizeof(*isert_conn->login_req_buf), |
430 | GFP_KERNEL); | |
93b80f29 | 431 | if (!isert_conn->login_req_buf) |
ae9ea9ed | 432 | return -ENOMEM; |
b8d26b3b | 433 | |
b8d26b3b | 434 | isert_conn->login_req_dma = ib_dma_map_single(ib_dev, |
5adabdd1 CH |
435 | isert_conn->login_req_buf, |
436 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
437 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); |
438 | if (ret) { | |
ae9ea9ed | 439 | isert_err("login_req_dma mapping error: %d\n", ret); |
b8d26b3b | 440 | isert_conn->login_req_dma = 0; |
5adabdd1 CH |
441 | goto out_free_login_req_buf; |
442 | } | |
443 | ||
444 | isert_conn->login_rsp_buf = kzalloc(ISER_RX_PAYLOAD_SIZE, GFP_KERNEL); | |
445 | if (!isert_conn->login_rsp_buf) { | |
1d5840c9 | 446 | ret = -ENOMEM; |
5adabdd1 | 447 | goto out_unmap_login_req_buf; |
b8d26b3b NB |
448 | } |
449 | ||
450 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
5adabdd1 | 451 | isert_conn->login_rsp_buf, |
ed1083b2 | 452 | ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE); |
b8d26b3b NB |
453 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); |
454 | if (ret) { | |
ae9ea9ed | 455 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b | 456 | isert_conn->login_rsp_dma = 0; |
5adabdd1 | 457 | goto out_free_login_rsp_buf; |
b8d26b3b NB |
458 | } |
459 | ||
ae9ea9ed SG |
460 | return 0; |
461 | ||
5adabdd1 CH |
462 | out_free_login_rsp_buf: |
463 | kfree(isert_conn->login_rsp_buf); | |
464 | out_unmap_login_req_buf: | |
ae9ea9ed | 465 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, |
5adabdd1 CH |
466 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); |
467 | out_free_login_req_buf: | |
468 | kfree(isert_conn->login_req_buf); | |
ae9ea9ed SG |
469 | return ret; |
470 | } | |
471 | ||
422bd0ac JD |
472 | static void |
473 | isert_set_nego_params(struct isert_conn *isert_conn, | |
474 | struct rdma_conn_param *param) | |
475 | { | |
476 | struct ib_device_attr *attr = &isert_conn->device->ib_device->attrs; | |
477 | ||
478 | /* Set max inflight RDMA READ requests */ | |
479 | isert_conn->initiator_depth = min_t(u8, param->initiator_depth, | |
480 | attr->max_qp_init_rd_atom); | |
481 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); | |
482 | ||
483 | if (param->private_data) { | |
484 | u8 flags = *(u8 *)param->private_data; | |
485 | ||
486 | /* | |
487 | * use remote invalidation if the both initiator | |
488 | * and the HCA support it | |
489 | */ | |
490 | isert_conn->snd_w_inv = !(flags & ISER_SEND_W_INV_NOT_SUP) && | |
491 | (attr->device_cap_flags & | |
492 | IB_DEVICE_MEM_MGT_EXTENSIONS); | |
493 | if (isert_conn->snd_w_inv) | |
494 | isert_info("Using remote invalidation\n"); | |
495 | } | |
496 | } | |
497 | ||
ae9ea9ed SG |
498 | static int |
499 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
500 | { | |
501 | struct isert_np *isert_np = cma_id->context; | |
502 | struct iscsi_np *np = isert_np->np; | |
503 | struct isert_conn *isert_conn; | |
504 | struct isert_device *device; | |
505 | int ret = 0; | |
506 | ||
507 | spin_lock_bh(&np->np_thread_lock); | |
508 | if (!np->enabled) { | |
509 | spin_unlock_bh(&np->np_thread_lock); | |
510 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
511 | return rdma_reject(cma_id, NULL, 0); | |
512 | } | |
513 | spin_unlock_bh(&np->np_thread_lock); | |
514 | ||
515 | isert_dbg("cma_id: %p, portal: %p\n", | |
516 | cma_id, cma_id->context); | |
517 | ||
518 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
519 | if (!isert_conn) | |
520 | return -ENOMEM; | |
521 | ||
522 | isert_init_conn(isert_conn); | |
dac6ab30 | 523 | isert_conn->cm_id = cma_id; |
ae9ea9ed SG |
524 | |
525 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); | |
526 | if (ret) | |
527 | goto out; | |
528 | ||
cf8ae958 | 529 | device = isert_device_get(cma_id); |
b8d26b3b NB |
530 | if (IS_ERR(device)) { |
531 | ret = PTR_ERR(device); | |
532 | goto out_rsp_dma_map; | |
533 | } | |
dac6ab30 | 534 | isert_conn->device = device; |
b8d26b3b | 535 | |
422bd0ac | 536 | isert_set_nego_params(isert_conn, &event->param.conn); |
1a92e17e | 537 | |
570db170 | 538 | ret = isert_conn_setup_qp(isert_conn, cma_id); |
b8d26b3b NB |
539 | if (ret) |
540 | goto out_conn_dev; | |
541 | ||
9679cc51 | 542 | ret = isert_login_post_recv(isert_conn); |
2371e5da SG |
543 | if (ret) |
544 | goto out_conn_dev; | |
545 | ||
546 | ret = isert_rdma_accept(isert_conn); | |
547 | if (ret) | |
548 | goto out_conn_dev; | |
549 | ||
ed8cb0a4 | 550 | mutex_lock(&isert_np->mutex); |
bd379220 | 551 | list_add_tail(&isert_conn->node, &isert_np->accepted); |
ed8cb0a4 | 552 | mutex_unlock(&isert_np->mutex); |
b8d26b3b | 553 | |
b8d26b3b NB |
554 | return 0; |
555 | ||
556 | out_conn_dev: | |
cf8ae958 | 557 | isert_device_put(device); |
b8d26b3b | 558 | out_rsp_dma_map: |
ae9ea9ed | 559 | isert_free_login_buf(isert_conn); |
b8d26b3b NB |
560 | out: |
561 | kfree(isert_conn); | |
2371e5da | 562 | rdma_reject(cma_id, NULL, 0); |
b8d26b3b NB |
563 | return ret; |
564 | } | |
565 | ||
566 | static void | |
567 | isert_connect_release(struct isert_conn *isert_conn) | |
568 | { | |
dac6ab30 | 569 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 570 | |
4c22e07f | 571 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 572 | |
57df81e3 SG |
573 | BUG_ON(!device); |
574 | ||
19e2090f | 575 | isert_free_rx_descriptors(isert_conn); |
63b268d2 RR |
576 | if (isert_conn->cm_id && |
577 | !isert_conn->dev_removed) | |
dac6ab30 | 578 | rdma_destroy_id(isert_conn->cm_id); |
19e2090f | 579 | |
dac6ab30 SG |
580 | if (isert_conn->qp) { |
581 | struct isert_comp *comp = isert_conn->qp->recv_cq->cq_context; | |
4a295bae | 582 | |
40fc069a | 583 | isert_comp_put(comp); |
dac6ab30 | 584 | ib_destroy_qp(isert_conn->qp); |
b8d26b3b NB |
585 | } |
586 | ||
5adabdd1 | 587 | if (isert_conn->login_req_buf) |
ae9ea9ed SG |
588 | isert_free_login_buf(isert_conn); |
589 | ||
57df81e3 | 590 | isert_device_put(device); |
b8d26b3b | 591 | |
63b268d2 RR |
592 | if (isert_conn->dev_removed) |
593 | wake_up_interruptible(&isert_conn->rem_wait); | |
594 | else | |
595 | kfree(isert_conn); | |
b8d26b3b NB |
596 | } |
597 | ||
598 | static void | |
599 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
600 | { | |
19e2090f | 601 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
bd379220 | 602 | struct isert_np *isert_np = cma_id->context; |
c2f88b17 | 603 | |
24f412dd | 604 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 605 | |
dac6ab30 | 606 | mutex_lock(&isert_conn->mutex); |
bd379220 JD |
607 | isert_conn->state = ISER_CONN_UP; |
608 | kref_get(&isert_conn->kref); | |
dac6ab30 | 609 | mutex_unlock(&isert_conn->mutex); |
bd379220 JD |
610 | |
611 | mutex_lock(&isert_np->mutex); | |
612 | list_move_tail(&isert_conn->node, &isert_np->pending); | |
613 | mutex_unlock(&isert_np->mutex); | |
614 | ||
615 | isert_info("np %p: Allow accept_np to continue\n", isert_np); | |
616 | up(&isert_np->sem); | |
b8d26b3b NB |
617 | } |
618 | ||
619 | static void | |
dac6ab30 | 620 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
621 | { |
622 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 623 | struct isert_conn, kref); |
b8d26b3b | 624 | |
4c22e07f SG |
625 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
626 | current->pid); | |
b8d26b3b NB |
627 | |
628 | isert_connect_release(isert_conn); | |
629 | } | |
630 | ||
631 | static void | |
632 | isert_put_conn(struct isert_conn *isert_conn) | |
633 | { | |
dac6ab30 | 634 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
635 | } |
636 | ||
6d1fba0c JD |
637 | static void |
638 | isert_handle_unbound_conn(struct isert_conn *isert_conn) | |
639 | { | |
640 | struct isert_np *isert_np = isert_conn->cm_id->context; | |
641 | ||
642 | mutex_lock(&isert_np->mutex); | |
643 | if (!list_empty(&isert_conn->node)) { | |
644 | /* | |
645 | * This means iscsi doesn't know this connection | |
646 | * so schedule a cleanup ourselves | |
647 | */ | |
648 | list_del_init(&isert_conn->node); | |
649 | isert_put_conn(isert_conn); | |
6d1fba0c JD |
650 | queue_work(isert_release_wq, &isert_conn->release_work); |
651 | } | |
652 | mutex_unlock(&isert_np->mutex); | |
653 | } | |
654 | ||
954f2372 SG |
655 | /** |
656 | * isert_conn_terminate() - Initiate connection termination | |
657 | * @isert_conn: isert connection struct | |
658 | * | |
659 | * Notes: | |
aea92980 | 660 | * In case the connection state is BOUND, move state |
954f2372 | 661 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 662 | * In case the connection state is UP, complete flush as well. |
954f2372 | 663 | * |
dac6ab30 | 664 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
665 | * safe to call multiple times. |
666 | */ | |
667 | static void | |
668 | isert_conn_terminate(struct isert_conn *isert_conn) | |
669 | { | |
670 | int err; | |
671 | ||
6d1fba0c JD |
672 | if (isert_conn->state >= ISER_CONN_TERMINATING) |
673 | return; | |
674 | ||
675 | isert_info("Terminating conn %p state %d\n", | |
676 | isert_conn, isert_conn->state); | |
677 | isert_conn->state = ISER_CONN_TERMINATING; | |
678 | err = rdma_disconnect(isert_conn->cm_id); | |
679 | if (err) | |
680 | isert_warn("Failed rdma_disconnect isert_conn %p\n", | |
681 | isert_conn); | |
954f2372 SG |
682 | } |
683 | ||
3b726ae2 | 684 | static int |
ca6c1d82 SG |
685 | isert_np_cma_handler(struct isert_np *isert_np, |
686 | enum rdma_cm_event_type event) | |
b8d26b3b | 687 | { |
ea8a1616 SG |
688 | isert_dbg("%s (%d): isert np %p\n", |
689 | rdma_event_msg(event), event, isert_np); | |
3b726ae2 | 690 | |
ca6c1d82 SG |
691 | switch (event) { |
692 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
ed8cb0a4 | 693 | isert_np->cm_id = NULL; |
ca6c1d82 SG |
694 | break; |
695 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
ed8cb0a4 JD |
696 | isert_np->cm_id = isert_setup_id(isert_np); |
697 | if (IS_ERR(isert_np->cm_id)) { | |
24f412dd | 698 | isert_err("isert np %p setup id failed: %ld\n", |
ed8cb0a4 JD |
699 | isert_np, PTR_ERR(isert_np->cm_id)); |
700 | isert_np->cm_id = NULL; | |
ca6c1d82 SG |
701 | } |
702 | break; | |
703 | default: | |
24f412dd | 704 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 705 | isert_np, event); |
3b726ae2 SG |
706 | } |
707 | ||
ca6c1d82 SG |
708 | return -1; |
709 | } | |
710 | ||
711 | static int | |
712 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
713 | enum rdma_cm_event_type event) | |
714 | { | |
f81bf458 | 715 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
ca6c1d82 | 716 | |
dac6ab30 | 717 | mutex_lock(&isert_conn->mutex); |
6d1fba0c JD |
718 | switch (isert_conn->state) { |
719 | case ISER_CONN_TERMINATING: | |
720 | break; | |
721 | case ISER_CONN_UP: | |
722 | isert_conn_terminate(isert_conn); | |
572a1434 | 723 | ib_drain_qp(isert_conn->qp); |
6d1fba0c JD |
724 | isert_handle_unbound_conn(isert_conn); |
725 | break; | |
726 | case ISER_CONN_BOUND: | |
727 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ | |
728 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
729 | break; | |
730 | default: | |
506f71d1 | 731 | isert_warn("conn %p terminating in state %d\n", |
6d1fba0c | 732 | isert_conn, isert_conn->state); |
2f1b6b7d | 733 | } |
6d1fba0c | 734 | mutex_unlock(&isert_conn->mutex); |
2f1b6b7d | 735 | |
3b726ae2 | 736 | return 0; |
b8d26b3b NB |
737 | } |
738 | ||
4a579da2 | 739 | static int |
954f2372 SG |
740 | isert_connect_error(struct rdma_cm_id *cma_id) |
741 | { | |
19e2090f | 742 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
954f2372 | 743 | |
bd379220 | 744 | list_del_init(&isert_conn->node); |
dac6ab30 | 745 | isert_conn->cm_id = NULL; |
954f2372 | 746 | isert_put_conn(isert_conn); |
4a579da2 SG |
747 | |
748 | return -1; | |
954f2372 SG |
749 | } |
750 | ||
b8d26b3b NB |
751 | static int |
752 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
753 | { | |
f81bf458 | 754 | struct isert_np *isert_np = cma_id->context; |
63b268d2 | 755 | struct isert_conn *isert_conn; |
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 */ | |
88c4015f | 776 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 777 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 778 | break; |
63b268d2 RR |
779 | case RDMA_CM_EVENT_DEVICE_REMOVAL: |
780 | isert_conn = cma_id->qp->qp_context; | |
781 | isert_conn->dev_removed = true; | |
782 | isert_disconnected_handler(cma_id, event->event); | |
783 | wait_event_interruptible(isert_conn->rem_wait, | |
784 | isert_conn->state == ISER_CONN_DOWN); | |
785 | kfree(isert_conn); | |
786 | /* | |
787 | * return non-zero from the callback to destroy | |
788 | * the rdma cm id | |
789 | */ | |
790 | return 1; | |
954f2372 | 791 | case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ |
1e38a366 SW |
792 | isert_info("Connection rejected: %s\n", |
793 | rdma_reject_msg(cma_id, event->status)); | |
954f2372 | 794 | case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ |
b8d26b3b | 795 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 796 | ret = isert_connect_error(cma_id); |
954f2372 | 797 | break; |
b8d26b3b | 798 | default: |
24f412dd | 799 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
800 | break; |
801 | } | |
802 | ||
b8d26b3b NB |
803 | return ret; |
804 | } | |
805 | ||
806 | static int | |
4366b19c | 807 | isert_post_recvm(struct isert_conn *isert_conn, u32 count) |
b8d26b3b NB |
808 | { |
809 | struct ib_recv_wr *rx_wr, *rx_wr_failed; | |
810 | int i, ret; | |
b8d26b3b NB |
811 | struct iser_rx_desc *rx_desc; |
812 | ||
dac6ab30 | 813 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
4366b19c | 814 | rx_desc = &isert_conn->rx_descs[i]; |
9679cc51 CH |
815 | |
816 | rx_wr->wr_cqe = &rx_desc->rx_cqe; | |
4366b19c JD |
817 | rx_wr->sg_list = &rx_desc->rx_sg; |
818 | rx_wr->num_sge = 1; | |
819 | rx_wr->next = rx_wr + 1; | |
7a56dc88 | 820 | rx_desc->in_use = false; |
b8d26b3b | 821 | } |
b8d26b3b NB |
822 | rx_wr--; |
823 | rx_wr->next = NULL; /* mark end of work requests list */ | |
824 | ||
dac6ab30 | 825 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, |
4366b19c | 826 | &rx_wr_failed); |
6d1fba0c | 827 | if (ret) |
24f412dd | 828 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
4366b19c JD |
829 | |
830 | return ret; | |
831 | } | |
832 | ||
833 | static int | |
834 | isert_post_recv(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc) | |
835 | { | |
836 | struct ib_recv_wr *rx_wr_failed, rx_wr; | |
837 | int ret; | |
838 | ||
7a56dc88 SG |
839 | if (!rx_desc->in_use) { |
840 | /* | |
841 | * if the descriptor is not in-use we already reposted it | |
842 | * for recv, so just silently return | |
843 | */ | |
844 | return 0; | |
845 | } | |
846 | ||
847 | rx_desc->in_use = false; | |
9679cc51 | 848 | rx_wr.wr_cqe = &rx_desc->rx_cqe; |
4366b19c JD |
849 | rx_wr.sg_list = &rx_desc->rx_sg; |
850 | rx_wr.num_sge = 1; | |
851 | rx_wr.next = NULL; | |
852 | ||
4366b19c | 853 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_failed); |
6d1fba0c | 854 | if (ret) |
4366b19c | 855 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
4366b19c | 856 | |
b8d26b3b NB |
857 | return ret; |
858 | } | |
859 | ||
860 | static int | |
9679cc51 | 861 | isert_login_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) |
b8d26b3b | 862 | { |
dac6ab30 | 863 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
864 | struct ib_send_wr send_wr, *send_wr_failed; |
865 | int ret; | |
866 | ||
867 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
868 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
869 | ||
9679cc51 CH |
870 | tx_desc->tx_cqe.done = isert_login_send_done; |
871 | ||
b8d26b3b | 872 | send_wr.next = NULL; |
9679cc51 | 873 | send_wr.wr_cqe = &tx_desc->tx_cqe; |
b8d26b3b NB |
874 | send_wr.sg_list = tx_desc->tx_sg; |
875 | send_wr.num_sge = tx_desc->num_sge; | |
876 | send_wr.opcode = IB_WR_SEND; | |
877 | send_wr.send_flags = IB_SEND_SIGNALED; | |
878 | ||
dac6ab30 | 879 | ret = ib_post_send(isert_conn->qp, &send_wr, &send_wr_failed); |
bdf20e72 | 880 | if (ret) |
24f412dd | 881 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
882 | |
883 | return ret; | |
884 | } | |
885 | ||
886 | static void | |
887 | isert_create_send_desc(struct isert_conn *isert_conn, | |
888 | struct isert_cmd *isert_cmd, | |
889 | struct iser_tx_desc *tx_desc) | |
890 | { | |
dac6ab30 | 891 | struct isert_device *device = isert_conn->device; |
67cb3949 | 892 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
893 | |
894 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
895 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
896 | ||
d3cf81f9 SG |
897 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_ctrl)); |
898 | tx_desc->iser_header.flags = ISCSI_CTRL; | |
b8d26b3b NB |
899 | |
900 | tx_desc->num_sge = 1; | |
b8d26b3b | 901 | |
34efc7df JG |
902 | if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) { |
903 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; | |
24f412dd | 904 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
905 | } |
906 | } | |
907 | ||
908 | static int | |
909 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
910 | struct iser_tx_desc *tx_desc) | |
911 | { | |
dac6ab30 | 912 | struct isert_device *device = isert_conn->device; |
67cb3949 | 913 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
914 | u64 dma_addr; |
915 | ||
916 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
917 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
918 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 919 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
920 | return -ENOMEM; |
921 | } | |
922 | ||
923 | tx_desc->dma_addr = dma_addr; | |
924 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
925 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
34efc7df | 926 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; |
b8d26b3b | 927 | |
4c22e07f SG |
928 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
929 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
930 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
931 | |
932 | return 0; | |
933 | } | |
934 | ||
935 | static void | |
95b60f07 | 936 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 937 | struct ib_send_wr *send_wr) |
b8d26b3b | 938 | { |
95b60f07 NB |
939 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
940 | ||
9679cc51 CH |
941 | tx_desc->tx_cqe.done = isert_send_done; |
942 | send_wr->wr_cqe = &tx_desc->tx_cqe; | |
422bd0ac JD |
943 | |
944 | if (isert_conn->snd_w_inv && isert_cmd->inv_rkey) { | |
945 | send_wr->opcode = IB_WR_SEND_WITH_INV; | |
946 | send_wr->ex.invalidate_rkey = isert_cmd->inv_rkey; | |
947 | } else { | |
948 | send_wr->opcode = IB_WR_SEND; | |
949 | } | |
950 | ||
95b60f07 | 951 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 952 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 953 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
954 | } |
955 | ||
956 | static int | |
9679cc51 | 957 | isert_login_post_recv(struct isert_conn *isert_conn) |
b8d26b3b NB |
958 | { |
959 | struct ib_recv_wr rx_wr, *rx_wr_fail; | |
960 | struct ib_sge sge; | |
961 | int ret; | |
962 | ||
963 | memset(&sge, 0, sizeof(struct ib_sge)); | |
964 | sge.addr = isert_conn->login_req_dma; | |
ed1083b2 | 965 | sge.length = ISER_RX_PAYLOAD_SIZE; |
34efc7df | 966 | sge.lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b | 967 | |
24f412dd | 968 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
969 | sge.addr, sge.length, sge.lkey); |
970 | ||
9679cc51 CH |
971 | isert_conn->login_req_buf->rx_cqe.done = isert_login_recv_done; |
972 | ||
b8d26b3b | 973 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); |
9679cc51 | 974 | rx_wr.wr_cqe = &isert_conn->login_req_buf->rx_cqe; |
b8d26b3b NB |
975 | rx_wr.sg_list = &sge; |
976 | rx_wr.num_sge = 1; | |
977 | ||
dac6ab30 | 978 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_fail); |
6d1fba0c | 979 | if (ret) |
24f412dd | 980 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b | 981 | |
b8d26b3b NB |
982 | return ret; |
983 | } | |
984 | ||
985 | static int | |
986 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
987 | u32 length) | |
988 | { | |
989 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 990 | struct isert_device *device = isert_conn->device; |
67cb3949 | 991 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 992 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
993 | int ret; |
994 | ||
995 | isert_create_send_desc(isert_conn, NULL, tx_desc); | |
996 | ||
997 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
998 | sizeof(struct iscsi_hdr)); | |
999 | ||
1000 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
1001 | ||
1002 | if (length > 0) { | |
1003 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
1004 | ||
1005 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
1006 | length, DMA_TO_DEVICE); | |
1007 | ||
1008 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
1009 | ||
1010 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
1011 | length, DMA_TO_DEVICE); | |
1012 | ||
1013 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
1014 | tx_dsg->length = length; | |
34efc7df | 1015 | tx_dsg->lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b NB |
1016 | tx_desc->num_sge = 2; |
1017 | } | |
1018 | if (!login->login_failed) { | |
1019 | if (login->login_complete) { | |
1020 | ret = isert_alloc_rx_descriptors(isert_conn); | |
1021 | if (ret) | |
1022 | return ret; | |
1023 | ||
4366b19c JD |
1024 | ret = isert_post_recvm(isert_conn, |
1025 | ISERT_QP_MAX_RECV_DTOS); | |
b8d26b3b NB |
1026 | if (ret) |
1027 | return ret; | |
1028 | ||
128e9cc8 | 1029 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 1030 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 1031 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 1032 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
1033 | goto post_send; |
1034 | } | |
1035 | ||
9679cc51 | 1036 | ret = isert_login_post_recv(isert_conn); |
b8d26b3b NB |
1037 | if (ret) |
1038 | return ret; | |
1039 | } | |
1040 | post_send: | |
9679cc51 | 1041 | ret = isert_login_post_send(isert_conn, tx_desc); |
b8d26b3b NB |
1042 | if (ret) |
1043 | return ret; | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static void | |
2371e5da | 1049 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 1050 | { |
5adabdd1 | 1051 | struct iser_rx_desc *rx_desc = isert_conn->login_req_buf; |
2371e5da | 1052 | int rx_buflen = isert_conn->login_req_len; |
b8d26b3b NB |
1053 | struct iscsi_conn *conn = isert_conn->conn; |
1054 | struct iscsi_login *login = conn->conn_login; | |
1055 | int size; | |
1056 | ||
24f412dd | 1057 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
1058 | |
1059 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
1060 | |
1061 | if (login->first_request) { | |
1062 | struct iscsi_login_req *login_req = | |
1063 | (struct iscsi_login_req *)&rx_desc->iscsi_header; | |
1064 | /* | |
1065 | * Setup the initial iscsi_login values from the leading | |
1066 | * login request PDU. | |
1067 | */ | |
1068 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
1069 | login->current_stage = | |
1070 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
1071 | >> 2; | |
1072 | login->version_min = login_req->min_version; | |
1073 | login->version_max = login_req->max_version; | |
1074 | memcpy(login->isid, login_req->isid, 6); | |
1075 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1076 | login->init_task_tag = login_req->itt; | |
1077 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1078 | login->cid = be16_to_cpu(login_req->cid); | |
1079 | login->tsih = be16_to_cpu(login_req->tsih); | |
1080 | } | |
1081 | ||
1082 | memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); | |
1083 | ||
1084 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1085 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1086 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1087 | MAX_KEY_VALUE_PAIRS); | |
b8d26b3b NB |
1088 | memcpy(login->req_buf, &rx_desc->data[0], size); |
1089 | ||
6faaa85f | 1090 | if (login->first_request) { |
dac6ab30 | 1091 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1092 | return; |
1093 | } | |
1094 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1095 | } |
1096 | ||
b8d26b3b | 1097 | static struct iscsi_cmd |
4366b19c | 1098 | *isert_allocate_cmd(struct iscsi_conn *conn, struct iser_rx_desc *rx_desc) |
b8d26b3b | 1099 | { |
6700425e | 1100 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1101 | struct isert_cmd *isert_cmd; |
d703ce2f | 1102 | struct iscsi_cmd *cmd; |
b8d26b3b | 1103 | |
676687c6 | 1104 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1105 | if (!cmd) { |
24f412dd | 1106 | isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); |
b8d26b3b NB |
1107 | return NULL; |
1108 | } | |
d703ce2f | 1109 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1110 | isert_cmd->conn = isert_conn; |
d703ce2f | 1111 | isert_cmd->iscsi_cmd = cmd; |
4366b19c | 1112 | isert_cmd->rx_desc = rx_desc; |
b8d26b3b | 1113 | |
d703ce2f | 1114 | return cmd; |
b8d26b3b NB |
1115 | } |
1116 | ||
1117 | static int | |
1118 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1119 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1120 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1121 | { |
b8d26b3b NB |
1122 | struct iscsi_conn *conn = isert_conn->conn; |
1123 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
b8d26b3b NB |
1124 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; |
1125 | bool dump_payload = false; | |
9fd60088 | 1126 | unsigned int data_len; |
b8d26b3b NB |
1127 | |
1128 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1129 | if (rc < 0) | |
1130 | return rc; | |
1131 | ||
1132 | imm_data = cmd->immediate_data; | |
1133 | imm_data_len = cmd->first_burst_len; | |
1134 | unsol_data = cmd->unsolicited_data; | |
9fd60088 | 1135 | data_len = cmd->se_cmd.data_length; |
b8d26b3b | 1136 | |
9fd60088 JD |
1137 | if (imm_data && imm_data_len == data_len) |
1138 | cmd->se_cmd.se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
b8d26b3b NB |
1139 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); |
1140 | if (rc < 0) { | |
1141 | return 0; | |
1142 | } else if (rc > 0) { | |
1143 | dump_payload = true; | |
1144 | goto sequence_cmd; | |
1145 | } | |
1146 | ||
1147 | if (!imm_data) | |
1148 | return 0; | |
1149 | ||
9fd60088 JD |
1150 | if (imm_data_len != data_len) { |
1151 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1152 | sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents, | |
1153 | &rx_desc->data[0], imm_data_len); | |
1154 | isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n", | |
1155 | sg_nents, imm_data_len); | |
1156 | } else { | |
1157 | sg_init_table(&isert_cmd->sg, 1); | |
1158 | cmd->se_cmd.t_data_sg = &isert_cmd->sg; | |
1159 | cmd->se_cmd.t_data_nents = 1; | |
1160 | sg_set_buf(&isert_cmd->sg, &rx_desc->data[0], imm_data_len); | |
1161 | isert_dbg("Transfer Immediate imm_data_len: %d\n", | |
1162 | imm_data_len); | |
1163 | } | |
b8d26b3b NB |
1164 | |
1165 | cmd->write_data_done += imm_data_len; | |
1166 | ||
1167 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1168 | spin_lock_bh(&cmd->istate_lock); | |
1169 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1170 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1171 | spin_unlock_bh(&cmd->istate_lock); | |
1172 | } | |
1173 | ||
1174 | sequence_cmd: | |
561bf158 | 1175 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b NB |
1176 | |
1177 | if (!rc && dump_payload == false && unsol_data) | |
1178 | iscsit_set_unsoliticed_dataout(cmd); | |
6cc44a6f | 1179 | else if (dump_payload && imm_data) |
afc16604 | 1180 | target_put_sess_cmd(&cmd->se_cmd); |
b8d26b3b | 1181 | |
b8d26b3b NB |
1182 | return 0; |
1183 | } | |
1184 | ||
1185 | static int | |
1186 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1187 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1188 | { | |
1189 | struct scatterlist *sg_start; | |
1190 | struct iscsi_conn *conn = isert_conn->conn; | |
1191 | struct iscsi_cmd *cmd = NULL; | |
1192 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1193 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1194 | int rc, sg_nents, sg_off, page_off; | |
1195 | ||
1196 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1197 | if (rc < 0) | |
1198 | return rc; | |
1199 | else if (!cmd) | |
1200 | return 0; | |
1201 | /* | |
1202 | * FIXME: Unexpected unsolicited_data out | |
1203 | */ | |
1204 | if (!cmd->unsolicited_data) { | |
24f412dd | 1205 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1206 | dump_stack(); |
1207 | return -1; | |
1208 | } | |
1209 | ||
4c22e07f SG |
1210 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1211 | "write_data_done: %u, data_length: %u\n", | |
1212 | unsol_data_len, cmd->write_data_done, | |
1213 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1214 | |
1215 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1216 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1217 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1218 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1219 | /* | |
1220 | * FIXME: Non page-aligned unsolicited_data out | |
1221 | */ | |
1222 | if (page_off) { | |
4c22e07f | 1223 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1224 | dump_stack(); |
1225 | return -1; | |
1226 | } | |
4c22e07f SG |
1227 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1228 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
1229 | sg_nents, &rx_desc->data[0], unsol_data_len); | |
b8d26b3b NB |
1230 | |
1231 | sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], | |
1232 | unsol_data_len); | |
1233 | ||
1234 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1235 | if (rc < 0) | |
1236 | return rc; | |
1237 | ||
4366b19c JD |
1238 | /* |
1239 | * multiple data-outs on the same command can arrive - | |
1240 | * so post the buffer before hand | |
1241 | */ | |
1242 | rc = isert_post_recv(isert_conn, rx_desc); | |
1243 | if (rc) { | |
1244 | isert_err("ib_post_recv failed with %d\n", rc); | |
1245 | return rc; | |
1246 | } | |
b8d26b3b NB |
1247 | return 0; |
1248 | } | |
1249 | ||
778de368 NB |
1250 | static int |
1251 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1252 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1253 | unsigned char *buf) | |
778de368 | 1254 | { |
778de368 NB |
1255 | struct iscsi_conn *conn = isert_conn->conn; |
1256 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1257 | int rc; | |
1258 | ||
1259 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1260 | if (rc < 0) | |
1261 | return rc; | |
1262 | /* | |
1263 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1264 | */ | |
1265 | ||
1266 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1267 | } | |
1268 | ||
adb54c29 NB |
1269 | static int |
1270 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1271 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1272 | struct iscsi_text *hdr) | |
adb54c29 | 1273 | { |
adb54c29 NB |
1274 | struct iscsi_conn *conn = isert_conn->conn; |
1275 | u32 payload_length = ntoh24(hdr->dlength); | |
1276 | int rc; | |
b44a2b67 | 1277 | unsigned char *text_in = NULL; |
adb54c29 NB |
1278 | |
1279 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1280 | if (rc < 0) | |
1281 | return rc; | |
1282 | ||
b44a2b67 SG |
1283 | if (payload_length) { |
1284 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
93b80f29 | 1285 | if (!text_in) |
b44a2b67 | 1286 | return -ENOMEM; |
adb54c29 NB |
1287 | } |
1288 | cmd->text_in_ptr = text_in; | |
1289 | ||
1290 | memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); | |
1291 | ||
1292 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1293 | } | |
1294 | ||
b8d26b3b NB |
1295 | static int |
1296 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1297 | uint32_t read_stag, uint64_t read_va, | |
1298 | uint32_t write_stag, uint64_t write_va) | |
1299 | { | |
1300 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
1301 | struct iscsi_conn *conn = isert_conn->conn; | |
1302 | struct iscsi_cmd *cmd; | |
1303 | struct isert_cmd *isert_cmd; | |
1304 | int ret = -EINVAL; | |
1305 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1306 | ||
fb140271 | 1307 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1308 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1309 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1310 | " ignoring\n", opcode); |
ca40d24e NB |
1311 | return 0; |
1312 | } | |
1313 | ||
b8d26b3b NB |
1314 | switch (opcode) { |
1315 | case ISCSI_OP_SCSI_CMD: | |
4366b19c | 1316 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1317 | if (!cmd) |
1318 | break; | |
1319 | ||
d703ce2f | 1320 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1321 | isert_cmd->read_stag = read_stag; |
1322 | isert_cmd->read_va = read_va; | |
1323 | isert_cmd->write_stag = write_stag; | |
1324 | isert_cmd->write_va = write_va; | |
422bd0ac | 1325 | isert_cmd->inv_rkey = read_stag ? read_stag : write_stag; |
b8d26b3b | 1326 | |
d703ce2f | 1327 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1328 | rx_desc, (unsigned char *)hdr); |
1329 | break; | |
1330 | case ISCSI_OP_NOOP_OUT: | |
4366b19c | 1331 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1332 | if (!cmd) |
1333 | break; | |
1334 | ||
d703ce2f NB |
1335 | isert_cmd = iscsit_priv_cmd(cmd); |
1336 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1337 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1338 | break; |
1339 | case ISCSI_OP_SCSI_DATA_OUT: | |
1340 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1341 | (unsigned char *)hdr); | |
1342 | break; | |
1343 | case ISCSI_OP_SCSI_TMFUNC: | |
4366b19c | 1344 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1345 | if (!cmd) |
1346 | break; | |
1347 | ||
1348 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1349 | (unsigned char *)hdr); | |
1350 | break; | |
1351 | case ISCSI_OP_LOGOUT: | |
4366b19c | 1352 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1353 | if (!cmd) |
1354 | break; | |
1355 | ||
1356 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1357 | break; |
adb54c29 | 1358 | case ISCSI_OP_TEXT: |
4366b19c | 1359 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) |
e4f4e801 | 1360 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); |
4366b19c JD |
1361 | else |
1362 | cmd = isert_allocate_cmd(conn, rx_desc); | |
1363 | ||
1364 | if (!cmd) | |
1365 | break; | |
adb54c29 | 1366 | |
d703ce2f NB |
1367 | isert_cmd = iscsit_priv_cmd(cmd); |
1368 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1369 | rx_desc, (struct iscsi_text *)hdr); |
1370 | break; | |
b8d26b3b | 1371 | default: |
24f412dd | 1372 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1373 | dump_stack(); |
1374 | break; | |
1375 | } | |
1376 | ||
1377 | return ret; | |
1378 | } | |
1379 | ||
1380 | static void | |
9679cc51 | 1381 | isert_print_wc(struct ib_wc *wc, const char *type) |
b8d26b3b | 1382 | { |
9679cc51 CH |
1383 | if (wc->status != IB_WC_WR_FLUSH_ERR) |
1384 | isert_err("%s failure: %s (%d) vend_err %x\n", type, | |
1385 | ib_wc_status_msg(wc->status), wc->status, | |
1386 | wc->vendor_err); | |
1387 | else | |
1388 | isert_dbg("%s failure: %s (%d)\n", type, | |
1389 | ib_wc_status_msg(wc->status), wc->status); | |
1390 | } | |
1391 | ||
1392 | static void | |
1393 | isert_recv_done(struct ib_cq *cq, struct ib_wc *wc) | |
1394 | { | |
1395 | struct isert_conn *isert_conn = wc->qp->qp_context; | |
1396 | struct ib_device *ib_dev = isert_conn->cm_id->device; | |
1397 | struct iser_rx_desc *rx_desc = cqe_to_rx_desc(wc->wr_cqe); | |
1398 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
d3cf81f9 | 1399 | struct iser_ctrl *iser_ctrl = &rx_desc->iser_header; |
b8d26b3b NB |
1400 | uint64_t read_va = 0, write_va = 0; |
1401 | uint32_t read_stag = 0, write_stag = 0; | |
b8d26b3b | 1402 | |
9679cc51 CH |
1403 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1404 | isert_print_wc(wc, "recv"); | |
1405 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1406 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1407 | return; | |
1408 | } | |
1409 | ||
7a56dc88 SG |
1410 | rx_desc->in_use = true; |
1411 | ||
9679cc51 CH |
1412 | ib_dma_sync_single_for_cpu(ib_dev, rx_desc->dma_addr, |
1413 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
1414 | ||
1415 | isert_dbg("DMA: 0x%llx, iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", | |
1416 | rx_desc->dma_addr, hdr->opcode, hdr->itt, hdr->flags, | |
1417 | (int)(wc->byte_len - ISER_HEADERS_LEN)); | |
1418 | ||
d3cf81f9 | 1419 | switch (iser_ctrl->flags & 0xF0) { |
b8d26b3b | 1420 | case ISCSI_CTRL: |
d3cf81f9 SG |
1421 | if (iser_ctrl->flags & ISER_RSV) { |
1422 | read_stag = be32_to_cpu(iser_ctrl->read_stag); | |
1423 | read_va = be64_to_cpu(iser_ctrl->read_va); | |
4c22e07f SG |
1424 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1425 | read_stag, (unsigned long long)read_va); | |
b8d26b3b | 1426 | } |
d3cf81f9 SG |
1427 | if (iser_ctrl->flags & ISER_WSV) { |
1428 | write_stag = be32_to_cpu(iser_ctrl->write_stag); | |
1429 | write_va = be64_to_cpu(iser_ctrl->write_va); | |
4c22e07f SG |
1430 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1431 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1432 | } |
1433 | ||
24f412dd | 1434 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1435 | break; |
1436 | case ISER_HELLO: | |
24f412dd | 1437 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1438 | break; |
1439 | default: | |
d3cf81f9 | 1440 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_ctrl->flags); |
b8d26b3b NB |
1441 | break; |
1442 | } | |
1443 | ||
6c760b3d BVA |
1444 | isert_rx_opcode(isert_conn, rx_desc, |
1445 | read_stag, read_va, write_stag, write_va); | |
9679cc51 CH |
1446 | |
1447 | ib_dma_sync_single_for_device(ib_dev, rx_desc->dma_addr, | |
1448 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
1449 | } |
1450 | ||
1451 | static void | |
9679cc51 | 1452 | isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1453 | { |
9679cc51 | 1454 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1455 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
9679cc51 CH |
1456 | |
1457 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
1458 | isert_print_wc(wc, "login recv"); | |
1459 | return; | |
b8d26b3b NB |
1460 | } |
1461 | ||
9679cc51 CH |
1462 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_req_dma, |
1463 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b | 1464 | |
9679cc51 | 1465 | isert_conn->login_req_len = wc->byte_len - ISER_HEADERS_LEN; |
b8d26b3b | 1466 | |
9679cc51 CH |
1467 | if (isert_conn->conn) { |
1468 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
2371e5da | 1469 | |
9679cc51 CH |
1470 | if (login && !login->first_request) |
1471 | isert_rx_login_req(isert_conn); | |
2371e5da | 1472 | } |
b8d26b3b | 1473 | |
9679cc51 CH |
1474 | mutex_lock(&isert_conn->mutex); |
1475 | complete(&isert_conn->login_req_comp); | |
1476 | mutex_unlock(&isert_conn->mutex); | |
b8d26b3b | 1477 | |
9679cc51 CH |
1478 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_req_dma, |
1479 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
1480 | } |
1481 | ||
1482 | static void | |
38a2d0d4 | 1483 | isert_rdma_rw_ctx_destroy(struct isert_cmd *cmd, struct isert_conn *conn) |
b8d26b3b | 1484 | { |
38a2d0d4 CH |
1485 | struct se_cmd *se_cmd = &cmd->iscsi_cmd->se_cmd; |
1486 | enum dma_data_direction dir = target_reverse_dma_direction(se_cmd); | |
b8d26b3b | 1487 | |
38a2d0d4 CH |
1488 | if (!cmd->rw.nr_ops) |
1489 | return; | |
59464ef4 | 1490 | |
38a2d0d4 CH |
1491 | if (isert_prot_cmd(conn, se_cmd)) { |
1492 | rdma_rw_ctx_destroy_signature(&cmd->rw, conn->qp, | |
1493 | conn->cm_id->port_num, se_cmd->t_data_sg, | |
1494 | se_cmd->t_data_nents, se_cmd->t_prot_sg, | |
1495 | se_cmd->t_prot_nents, dir); | |
1496 | } else { | |
1497 | rdma_rw_ctx_destroy(&cmd->rw, conn->qp, conn->cm_id->port_num, | |
1498 | se_cmd->t_data_sg, se_cmd->t_data_nents, dir); | |
59464ef4 VP |
1499 | } |
1500 | ||
38a2d0d4 | 1501 | cmd->rw.nr_ops = 0; |
59464ef4 VP |
1502 | } |
1503 | ||
b8d26b3b | 1504 | static void |
03e7848a | 1505 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1506 | { |
d703ce2f | 1507 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1508 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1509 | struct iscsi_conn *conn = isert_conn->conn; |
e4f4e801 | 1510 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1511 | |
4c22e07f | 1512 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1513 | |
1514 | switch (cmd->iscsi_opcode) { | |
1515 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1516 | spin_lock_bh(&conn->cmd_lock); |
1517 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1518 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1519 | spin_unlock_bh(&conn->cmd_lock); |
1520 | ||
03e7848a | 1521 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1522 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1523 | /* |
1524 | * Check for special case during comp_err where | |
1525 | * WRITE_PENDING has been handed off from core, | |
1526 | * but requires an extra target_put_sess_cmd() | |
1527 | * before transport_generic_free_cmd() below. | |
1528 | */ | |
1529 | if (comp_err && | |
1530 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1531 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1532 | ||
afc16604 | 1533 | target_put_sess_cmd(se_cmd); |
03e7848a NB |
1534 | } |
1535 | } | |
b8d26b3b | 1536 | |
38a2d0d4 | 1537 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
186a9647 NB |
1538 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1539 | break; | |
b8d26b3b | 1540 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1541 | spin_lock_bh(&conn->cmd_lock); |
1542 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1543 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1544 | spin_unlock_bh(&conn->cmd_lock); |
1545 | ||
b8d26b3b NB |
1546 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1547 | break; | |
1548 | case ISCSI_OP_REJECT: | |
1549 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1550 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1551 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1552 | /* If the continue bit is on, keep the command alive */ | |
1553 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1554 | break; | |
1555 | ||
b8d26b3b NB |
1556 | spin_lock_bh(&conn->cmd_lock); |
1557 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1558 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1559 | spin_unlock_bh(&conn->cmd_lock); |
1560 | ||
1561 | /* | |
1562 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1563 | * overwritten the original iscsi_opcode assignment, and the | |
1564 | * associated cmd->se_cmd needs to be released. | |
1565 | */ | |
1566 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1567 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1568 | cmd->iscsi_opcode); |
b8d26b3b NB |
1569 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1570 | break; | |
1571 | } | |
1572 | /* | |
1573 | * Fall-through | |
1574 | */ | |
1575 | default: | |
d703ce2f | 1576 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1577 | break; |
1578 | } | |
1579 | } | |
1580 | ||
1581 | static void | |
1582 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1583 | { | |
1584 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1585 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1586 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1587 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1588 | tx_desc->dma_addr = 0; | |
1589 | } | |
1590 | } | |
1591 | ||
1592 | static void | |
1593 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1594 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1595 | { |
dbbc5d11 | 1596 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1597 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1598 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1599 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1600 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1601 | } |
1602 | ||
1603 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1604 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1605 | } |
1606 | ||
96b7973e SG |
1607 | static int |
1608 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1609 | { | |
1610 | struct ib_mr_status mr_status; | |
1611 | int ret; | |
1612 | ||
1613 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1614 | if (ret) { | |
24f412dd | 1615 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1616 | goto fail_mr_status; |
1617 | } | |
1618 | ||
1619 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1620 | u64 sec_offset_err; | |
1621 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1622 | ||
1623 | switch (mr_status.sig_err.err_type) { | |
1624 | case IB_SIG_BAD_GUARD: | |
1625 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1626 | break; | |
1627 | case IB_SIG_BAD_REFTAG: | |
1628 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1629 | break; | |
1630 | case IB_SIG_BAD_APPTAG: | |
1631 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1632 | break; | |
1633 | } | |
1634 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1635 | do_div(sec_offset_err, block_size); | |
1636 | se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; | |
1637 | ||
4c22e07f SG |
1638 | isert_err("PI error found type %d at sector 0x%llx " |
1639 | "expected 0x%x vs actual 0x%x\n", | |
1640 | mr_status.sig_err.err_type, | |
1641 | (unsigned long long)se_cmd->bad_sector, | |
1642 | mr_status.sig_err.expected, | |
1643 | mr_status.sig_err.actual); | |
96b7973e SG |
1644 | ret = 1; |
1645 | } | |
1646 | ||
1647 | fail_mr_status: | |
1648 | return ret; | |
1649 | } | |
1650 | ||
f93f3a70 | 1651 | static void |
9679cc51 | 1652 | isert_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc) |
f93f3a70 | 1653 | { |
9679cc51 | 1654 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1655 | struct isert_device *device = isert_conn->device; |
9679cc51 | 1656 | struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe); |
e3416ab2 | 1657 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc); |
9679cc51 | 1658 | struct se_cmd *cmd = &isert_cmd->iscsi_cmd->se_cmd; |
9e961ae7 SG |
1659 | int ret = 0; |
1660 | ||
9679cc51 CH |
1661 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1662 | isert_print_wc(wc, "rdma write"); | |
1663 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1664 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1665 | isert_completion_put(desc, isert_cmd, device->ib_device, true); | |
1666 | return; | |
1667 | } | |
1668 | ||
1669 | isert_dbg("Cmd %p\n", isert_cmd); | |
1670 | ||
38a2d0d4 CH |
1671 | ret = isert_check_pi_status(cmd, isert_cmd->rw.sig->sig_mr); |
1672 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); | |
f93f3a70 | 1673 | |
555a65f6 NB |
1674 | if (ret) { |
1675 | /* | |
1676 | * transport_generic_request_failure() expects to have | |
1677 | * plus two references to handle queue-full, so re-add | |
1678 | * one here as target-core will have already dropped | |
1679 | * it after the first isert_put_datain() callback. | |
1680 | */ | |
1681 | kref_get(&cmd->cmd_kref); | |
1682 | transport_generic_request_failure(cmd, cmd->pi_err); | |
1683 | } else { | |
1684 | /* | |
1685 | * XXX: isert_put_response() failure is not retried. | |
1686 | */ | |
1687 | ret = isert_put_response(isert_conn->conn, isert_cmd->iscsi_cmd); | |
1688 | if (ret) | |
1689 | pr_warn_ratelimited("isert_put_response() ret: %d\n", ret); | |
1690 | } | |
f93f3a70 SG |
1691 | } |
1692 | ||
b8d26b3b | 1693 | static void |
9679cc51 | 1694 | isert_rdma_read_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1695 | { |
9679cc51 CH |
1696 | struct isert_conn *isert_conn = wc->qp->qp_context; |
1697 | struct isert_device *device = isert_conn->device; | |
1698 | struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe); | |
e3416ab2 | 1699 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc); |
d703ce2f | 1700 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1701 | struct se_cmd *se_cmd = &cmd->se_cmd; |
5bac4b1a | 1702 | int ret = 0; |
b8d26b3b | 1703 | |
9679cc51 CH |
1704 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1705 | isert_print_wc(wc, "rdma read"); | |
1706 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1707 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1708 | isert_completion_put(desc, isert_cmd, device->ib_device, true); | |
1709 | return; | |
1710 | } | |
1711 | ||
1712 | isert_dbg("Cmd %p\n", isert_cmd); | |
1713 | ||
b8d26b3b | 1714 | iscsit_stop_dataout_timer(cmd); |
38a2d0d4 CH |
1715 | |
1716 | if (isert_prot_cmd(isert_conn, se_cmd)) | |
1717 | ret = isert_check_pi_status(se_cmd, isert_cmd->rw.sig->sig_mr); | |
1718 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); | |
1719 | cmd->write_data_done = 0; | |
b8d26b3b | 1720 | |
24f412dd | 1721 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1722 | spin_lock_bh(&cmd->istate_lock); |
1723 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1724 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1725 | spin_unlock_bh(&cmd->istate_lock); | |
1726 | ||
555a65f6 NB |
1727 | /* |
1728 | * transport_generic_request_failure() will drop the extra | |
1729 | * se_cmd->cmd_kref reference after T10-PI error, and handle | |
1730 | * any non-zero ->queue_status() callback error retries. | |
1731 | */ | |
1732 | if (ret) | |
1733 | transport_generic_request_failure(se_cmd, se_cmd->pi_err); | |
1734 | else | |
5bac4b1a | 1735 | target_execute_cmd(se_cmd); |
b8d26b3b NB |
1736 | } |
1737 | ||
1738 | static void | |
1739 | isert_do_control_comp(struct work_struct *work) | |
1740 | { | |
1741 | struct isert_cmd *isert_cmd = container_of(work, | |
1742 | struct isert_cmd, comp_work); | |
1743 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1744 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
d703ce2f | 1745 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1746 | |
4c22e07f SG |
1747 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1748 | ||
b8d26b3b NB |
1749 | switch (cmd->i_state) { |
1750 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1751 | iscsit_tmr_post_handler(cmd, cmd->conn); |
10633c37 SG |
1752 | case ISTATE_SEND_REJECT: /* FALLTHRU */ |
1753 | case ISTATE_SEND_TEXTRSP: /* FALLTHRU */ | |
b8d26b3b | 1754 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1755 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1756 | ib_dev, false); | |
3df8f68a | 1757 | break; |
b8d26b3b | 1758 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1759 | iscsit_logout_post_handler(cmd, cmd->conn); |
1760 | break; | |
1761 | default: | |
4c22e07f | 1762 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1763 | dump_stack(); |
1764 | break; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | static void | |
9679cc51 | 1769 | isert_login_send_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1770 | { |
9679cc51 CH |
1771 | struct isert_conn *isert_conn = wc->qp->qp_context; |
1772 | struct ib_device *ib_dev = isert_conn->cm_id->device; | |
1773 | struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe); | |
b8d26b3b | 1774 | |
9679cc51 CH |
1775 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1776 | isert_print_wc(wc, "login send"); | |
1777 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1778 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
b8d26b3b | 1779 | } |
897bb2c9 | 1780 | |
9679cc51 | 1781 | isert_unmap_tx_desc(tx_desc, ib_dev); |
b8d26b3b NB |
1782 | } |
1783 | ||
1784 | static void | |
9679cc51 | 1785 | isert_send_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1786 | { |
9679cc51 | 1787 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1788 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
9679cc51 | 1789 | struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe); |
e3416ab2 | 1790 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(tx_desc); |
b8d26b3b | 1791 | |
9679cc51 CH |
1792 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1793 | isert_print_wc(wc, "send"); | |
1794 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1795 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1796 | isert_completion_put(tx_desc, isert_cmd, ib_dev, true); | |
b8d26b3b NB |
1797 | return; |
1798 | } | |
b8d26b3b | 1799 | |
9679cc51 | 1800 | isert_dbg("Cmd %p\n", isert_cmd); |
4c22e07f | 1801 | |
9679cc51 CH |
1802 | switch (isert_cmd->iscsi_cmd->i_state) { |
1803 | case ISTATE_SEND_TASKMGTRSP: | |
1804 | case ISTATE_SEND_LOGOUTRSP: | |
1805 | case ISTATE_SEND_REJECT: | |
1806 | case ISTATE_SEND_TEXTRSP: | |
1807 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
1808 | ||
1809 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1810 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1811 | return; | |
b8d26b3b | 1812 | default: |
9679cc51 CH |
1813 | isert_cmd->iscsi_cmd->i_state = ISTATE_SENT_STATUS; |
1814 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); | |
b8d26b3b NB |
1815 | break; |
1816 | } | |
1817 | } | |
1818 | ||
b8d26b3b NB |
1819 | static int |
1820 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
1821 | { | |
1822 | struct ib_send_wr *wr_failed; | |
1823 | int ret; | |
1824 | ||
4366b19c JD |
1825 | ret = isert_post_recv(isert_conn, isert_cmd->rx_desc); |
1826 | if (ret) { | |
1827 | isert_err("ib_post_recv failed with %d\n", ret); | |
1828 | return ret; | |
1829 | } | |
1830 | ||
dac6ab30 | 1831 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, |
b8d26b3b NB |
1832 | &wr_failed); |
1833 | if (ret) { | |
24f412dd | 1834 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
1835 | return ret; |
1836 | } | |
1837 | return ret; | |
1838 | } | |
1839 | ||
1840 | static int | |
1841 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
1842 | { | |
d703ce2f | 1843 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1844 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1845 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1846 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
1847 | &isert_cmd->tx_desc.iscsi_header; | |
1848 | ||
1849 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1850 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
1851 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
1852 | /* | |
1853 | * Attach SENSE DATA payload to iSCSI Response PDU | |
1854 | */ | |
1855 | if (cmd->se_cmd.sense_buffer && | |
1856 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
1857 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 1858 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1859 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 1860 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 1861 | u32 padding, pdu_len; |
b8d26b3b NB |
1862 | |
1863 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
1864 | cmd->sense_buffer); | |
1865 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
1866 | ||
1867 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
1868 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 1869 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 1870 | |
dbbc5d11 NB |
1871 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
1872 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b | 1873 | DMA_TO_DEVICE); |
def4a6ff AK |
1874 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
1875 | return -ENOMEM; | |
b8d26b3b | 1876 | |
dbbc5d11 NB |
1877 | isert_cmd->pdu_buf_len = pdu_len; |
1878 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
1879 | tx_dsg->length = pdu_len; | |
34efc7df | 1880 | tx_dsg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
1881 | isert_cmd->tx_desc.num_sge = 2; |
1882 | } | |
1883 | ||
68a86dee | 1884 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1885 | |
4c22e07f | 1886 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
1887 | |
1888 | return isert_post_response(isert_conn, isert_cmd); | |
1889 | } | |
1890 | ||
131e6abc NB |
1891 | static void |
1892 | isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
1893 | { | |
1894 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 1895 | struct isert_conn *isert_conn = conn->context; |
131e6abc NB |
1896 | |
1897 | spin_lock_bh(&conn->cmd_lock); | |
1898 | if (!list_empty(&cmd->i_conn_node)) | |
1899 | list_del_init(&cmd->i_conn_node); | |
1900 | spin_unlock_bh(&conn->cmd_lock); | |
1901 | ||
1902 | if (cmd->data_direction == DMA_TO_DEVICE) | |
1903 | iscsit_stop_dataout_timer(cmd); | |
38a2d0d4 | 1904 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
131e6abc NB |
1905 | } |
1906 | ||
e70beee7 NB |
1907 | static enum target_prot_op |
1908 | isert_get_sup_prot_ops(struct iscsi_conn *conn) | |
1909 | { | |
6700425e | 1910 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 1911 | struct isert_device *device = isert_conn->device; |
e70beee7 | 1912 | |
23a548ee SG |
1913 | if (conn->tpg->tpg_attrib.t10_pi) { |
1914 | if (device->pi_capable) { | |
24f412dd | 1915 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
1916 | isert_conn->pi_support = true; |
1917 | return TARGET_PROT_ALL; | |
1918 | } | |
1919 | } | |
1920 | ||
24f412dd | 1921 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 1922 | isert_conn->pi_support = false; |
e70beee7 NB |
1923 | |
1924 | return TARGET_PROT_NORMAL; | |
1925 | } | |
1926 | ||
b8d26b3b NB |
1927 | static int |
1928 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
1929 | bool nopout_response) | |
1930 | { | |
d703ce2f | 1931 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1932 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1933 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1934 | ||
1935 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1936 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
1937 | &isert_cmd->tx_desc.iscsi_header, | |
1938 | nopout_response); | |
1939 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1940 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1941 | |
4c22e07f | 1942 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
1943 | |
1944 | return isert_post_response(isert_conn, isert_cmd); | |
1945 | } | |
1946 | ||
1947 | static int | |
1948 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1949 | { | |
d703ce2f | 1950 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1951 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1952 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1953 | ||
1954 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1955 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
1956 | &isert_cmd->tx_desc.iscsi_header); | |
1957 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1958 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1959 | |
4c22e07f | 1960 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
1961 | |
1962 | return isert_post_response(isert_conn, isert_cmd); | |
1963 | } | |
1964 | ||
1965 | static int | |
1966 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1967 | { | |
d703ce2f | 1968 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1969 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1970 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1971 | ||
1972 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1973 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
1974 | &isert_cmd->tx_desc.iscsi_header); | |
1975 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1976 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1977 | |
4c22e07f | 1978 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
1979 | |
1980 | return isert_post_response(isert_conn, isert_cmd); | |
1981 | } | |
1982 | ||
1983 | static int | |
1984 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1985 | { | |
d703ce2f | 1986 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1987 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1988 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 1989 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1990 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
1991 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
1992 | struct iscsi_reject *hdr = | |
1993 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
1994 | |
1995 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 1996 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 1997 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
1998 | |
1999 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 2000 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
2001 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
2002 | DMA_TO_DEVICE); | |
def4a6ff AK |
2003 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
2004 | return -ENOMEM; | |
dbbc5d11 NB |
2005 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
2006 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 2007 | tx_dsg->length = ISCSI_HDR_LEN; |
34efc7df | 2008 | tx_dsg->lkey = device->pd->local_dma_lkey; |
3df8f68a NB |
2009 | isert_cmd->tx_desc.num_sge = 2; |
2010 | ||
68a86dee | 2011 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2012 | |
4c22e07f | 2013 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
2014 | |
2015 | return isert_post_response(isert_conn, isert_cmd); | |
2016 | } | |
2017 | ||
adb54c29 NB |
2018 | static int |
2019 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2020 | { | |
d703ce2f | 2021 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2022 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
2023 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2024 | struct iscsi_text_rsp *hdr = | |
2025 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
2026 | u32 txt_rsp_len; | |
2027 | int rc; | |
2028 | ||
2029 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 2030 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
2031 | if (rc < 0) |
2032 | return rc; | |
2033 | ||
2034 | txt_rsp_len = rc; | |
2035 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2036 | ||
2037 | if (txt_rsp_len) { | |
dac6ab30 | 2038 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2039 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
2040 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2041 | void *txt_rsp_buf = cmd->buf_ptr; | |
2042 | ||
2043 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
2044 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
def4a6ff AK |
2045 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
2046 | return -ENOMEM; | |
adb54c29 NB |
2047 | |
2048 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
2049 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2050 | tx_dsg->length = txt_rsp_len; | |
34efc7df | 2051 | tx_dsg->lkey = device->pd->local_dma_lkey; |
adb54c29 NB |
2052 | isert_cmd->tx_desc.num_sge = 2; |
2053 | } | |
68a86dee | 2054 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 2055 | |
f64d2792 | 2056 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
2057 | |
2058 | return isert_post_response(isert_conn, isert_cmd); | |
2059 | } | |
2060 | ||
3d73cf1a SG |
2061 | static inline void |
2062 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, | |
2063 | struct ib_sig_domain *domain) | |
2064 | { | |
78eda2bb | 2065 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
2066 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
2067 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
2068 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
2069 | /* |
2070 | * At the moment we hard code those, but if in the future | |
2071 | * the target core would like to use it, we will take it | |
2072 | * from se_cmd. | |
2073 | */ | |
2074 | domain->sig.dif.apptag_check_mask = 0xffff; | |
2075 | domain->sig.dif.app_escape = true; | |
2076 | domain->sig.dif.ref_escape = true; | |
2077 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
2078 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
2079 | domain->sig.dif.ref_remap = true; | |
3d73cf1a SG |
2080 | }; |
2081 | ||
9e961ae7 SG |
2082 | static int |
2083 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2084 | { | |
38a2d0d4 CH |
2085 | memset(sig_attrs, 0, sizeof(*sig_attrs)); |
2086 | ||
9e961ae7 SG |
2087 | switch (se_cmd->prot_op) { |
2088 | case TARGET_PROT_DIN_INSERT: | |
2089 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2090 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2091 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
9e961ae7 SG |
2092 | break; |
2093 | case TARGET_PROT_DOUT_INSERT: | |
2094 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2095 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2096 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); |
9e961ae7 SG |
2097 | break; |
2098 | case TARGET_PROT_DIN_PASS: | |
2099 | case TARGET_PROT_DOUT_PASS: | |
3d73cf1a SG |
2100 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
2101 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); | |
9e961ae7 SG |
2102 | break; |
2103 | default: | |
24f412dd | 2104 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2105 | return -EINVAL; |
2106 | } | |
2107 | ||
38a2d0d4 CH |
2108 | sig_attrs->check_mask = |
2109 | (se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | | |
2110 | (se_cmd->prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | | |
2111 | (se_cmd->prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); | |
9e961ae7 SG |
2112 | return 0; |
2113 | } | |
2114 | ||
9e961ae7 | 2115 | static int |
38a2d0d4 CH |
2116 | isert_rdma_rw_ctx_post(struct isert_cmd *cmd, struct isert_conn *conn, |
2117 | struct ib_cqe *cqe, struct ib_send_wr *chain_wr) | |
2118 | { | |
2119 | struct se_cmd *se_cmd = &cmd->iscsi_cmd->se_cmd; | |
2120 | enum dma_data_direction dir = target_reverse_dma_direction(se_cmd); | |
2121 | u8 port_num = conn->cm_id->port_num; | |
2122 | u64 addr; | |
2123 | u32 rkey, offset; | |
9e961ae7 | 2124 | int ret; |
9e961ae7 | 2125 | |
38a2d0d4 CH |
2126 | if (dir == DMA_FROM_DEVICE) { |
2127 | addr = cmd->write_va; | |
2128 | rkey = cmd->write_stag; | |
2129 | offset = cmd->iscsi_cmd->write_data_done; | |
570db170 | 2130 | } else { |
38a2d0d4 CH |
2131 | addr = cmd->read_va; |
2132 | rkey = cmd->read_stag; | |
2133 | offset = 0; | |
570db170 | 2134 | } |
9e961ae7 | 2135 | |
38a2d0d4 CH |
2136 | if (isert_prot_cmd(conn, se_cmd)) { |
2137 | struct ib_sig_attrs sig_attrs; | |
59464ef4 | 2138 | |
38a2d0d4 CH |
2139 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); |
2140 | if (ret) | |
2141 | return ret; | |
9679cc51 | 2142 | |
38a2d0d4 CH |
2143 | WARN_ON_ONCE(offset); |
2144 | ret = rdma_rw_ctx_signature_init(&cmd->rw, conn->qp, port_num, | |
2145 | se_cmd->t_data_sg, se_cmd->t_data_nents, | |
2146 | se_cmd->t_prot_sg, se_cmd->t_prot_nents, | |
2147 | &sig_attrs, addr, rkey, dir); | |
59464ef4 | 2148 | } else { |
38a2d0d4 CH |
2149 | ret = rdma_rw_ctx_init(&cmd->rw, conn->qp, port_num, |
2150 | se_cmd->t_data_sg, se_cmd->t_data_nents, | |
2151 | offset, addr, rkey, dir); | |
59464ef4 | 2152 | } |
38a2d0d4 CH |
2153 | if (ret < 0) { |
2154 | isert_err("Cmd: %p failed to prepare RDMA res\n", cmd); | |
2155 | return ret; | |
59464ef4 VP |
2156 | } |
2157 | ||
38a2d0d4 CH |
2158 | ret = rdma_rw_ctx_post(&cmd->rw, conn->qp, port_num, cqe, chain_wr); |
2159 | if (ret < 0) | |
2160 | isert_err("Cmd: %p failed to post RDMA res\n", cmd); | |
59464ef4 VP |
2161 | return ret; |
2162 | } | |
2163 | ||
90ecc6e2 VP |
2164 | static int |
2165 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2166 | { | |
2167 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2168 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2169 | struct isert_conn *isert_conn = conn->context; |
38a2d0d4 CH |
2170 | struct ib_cqe *cqe = NULL; |
2171 | struct ib_send_wr *chain_wr = NULL; | |
90ecc6e2 VP |
2172 | int rc; |
2173 | ||
24f412dd | 2174 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2175 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2176 | |
38a2d0d4 CH |
2177 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
2178 | isert_cmd->tx_desc.tx_cqe.done = isert_rdma_write_done; | |
2179 | cqe = &isert_cmd->tx_desc.tx_cqe; | |
2180 | } else { | |
9e961ae7 SG |
2181 | /* |
2182 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2183 | */ | |
2184 | isert_create_send_desc(isert_conn, isert_cmd, | |
2185 | &isert_cmd->tx_desc); | |
2186 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2187 | &isert_cmd->tx_desc.iscsi_header); | |
2188 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2189 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2190 | &isert_cmd->tx_desc.send_wr); |
4366b19c JD |
2191 | |
2192 | rc = isert_post_recv(isert_conn, isert_cmd->rx_desc); | |
2193 | if (rc) { | |
2194 | isert_err("ib_post_recv failed with %d\n", rc); | |
2195 | return rc; | |
2196 | } | |
b8d26b3b | 2197 | |
38a2d0d4 CH |
2198 | chain_wr = &isert_cmd->tx_desc.send_wr; |
2199 | } | |
b8d26b3b | 2200 | |
555a65f6 NB |
2201 | rc = isert_rdma_rw_ctx_post(isert_cmd, isert_conn, cqe, chain_wr); |
2202 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ rc: %d\n", | |
2203 | isert_cmd, rc); | |
2204 | return rc; | |
b8d26b3b NB |
2205 | } |
2206 | ||
2207 | static int | |
2208 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2209 | { | |
d703ce2f | 2210 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
555a65f6 | 2211 | int ret; |
b8d26b3b | 2212 | |
24f412dd | 2213 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
38a2d0d4 | 2214 | isert_cmd, cmd->se_cmd.data_length, cmd->write_data_done); |
b8d26b3b | 2215 | |
38a2d0d4 | 2216 | isert_cmd->tx_desc.tx_cqe.done = isert_rdma_read_done; |
555a65f6 NB |
2217 | ret = isert_rdma_rw_ctx_post(isert_cmd, conn->context, |
2218 | &isert_cmd->tx_desc.tx_cqe, NULL); | |
bdf20e72 | 2219 | |
555a65f6 NB |
2220 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE rc: %d\n", |
2221 | isert_cmd, ret); | |
2222 | return ret; | |
b8d26b3b NB |
2223 | } |
2224 | ||
2225 | static int | |
2226 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2227 | { | |
a4c15cd9 JD |
2228 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
2229 | int ret = 0; | |
b8d26b3b NB |
2230 | |
2231 | switch (state) { | |
a4c15cd9 JD |
2232 | case ISTATE_REMOVE: |
2233 | spin_lock_bh(&conn->cmd_lock); | |
2234 | list_del_init(&cmd->i_conn_node); | |
2235 | spin_unlock_bh(&conn->cmd_lock); | |
2236 | isert_put_cmd(isert_cmd, true); | |
2237 | break; | |
b8d26b3b NB |
2238 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: |
2239 | ret = isert_put_nopin(cmd, conn, false); | |
2240 | break; | |
2241 | default: | |
24f412dd | 2242 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
2243 | ret = -EINVAL; |
2244 | break; | |
2245 | } | |
2246 | ||
2247 | return ret; | |
2248 | } | |
2249 | ||
2250 | static int | |
2251 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2252 | { | |
991bb764 | 2253 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2254 | int ret; |
2255 | ||
2256 | switch (state) { | |
2257 | case ISTATE_SEND_LOGOUTRSP: | |
2258 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
2259 | if (!ret) |
2260 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
2261 | break; |
2262 | case ISTATE_SEND_NOPIN: | |
2263 | ret = isert_put_nopin(cmd, conn, true); | |
2264 | break; | |
2265 | case ISTATE_SEND_TASKMGTRSP: | |
2266 | ret = isert_put_tm_rsp(cmd, conn); | |
2267 | break; | |
2268 | case ISTATE_SEND_REJECT: | |
2269 | ret = isert_put_reject(cmd, conn); | |
2270 | break; | |
adb54c29 NB |
2271 | case ISTATE_SEND_TEXTRSP: |
2272 | ret = isert_put_text_rsp(cmd, conn); | |
2273 | break; | |
b8d26b3b NB |
2274 | case ISTATE_SEND_STATUS: |
2275 | /* | |
2276 | * Special case for sending non GOOD SCSI status from TX thread | |
2277 | * context during pre se_cmd excecution failure. | |
2278 | */ | |
2279 | ret = isert_put_response(conn, cmd); | |
2280 | break; | |
2281 | default: | |
24f412dd | 2282 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
2283 | ret = -EINVAL; |
2284 | break; | |
2285 | } | |
2286 | ||
2287 | return ret; | |
2288 | } | |
2289 | ||
ca6c1d82 SG |
2290 | struct rdma_cm_id * |
2291 | isert_setup_id(struct isert_np *isert_np) | |
2292 | { | |
2293 | struct iscsi_np *np = isert_np->np; | |
2294 | struct rdma_cm_id *id; | |
2295 | struct sockaddr *sa; | |
2296 | int ret; | |
2297 | ||
2298 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 2299 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 | 2300 | |
fa20105e | 2301 | id = rdma_create_id(&init_net, isert_cma_handler, isert_np, |
ca6c1d82 SG |
2302 | RDMA_PS_TCP, IB_QPT_RC); |
2303 | if (IS_ERR(id)) { | |
24f412dd | 2304 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
2305 | ret = PTR_ERR(id); |
2306 | goto out; | |
2307 | } | |
24f412dd | 2308 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 SG |
2309 | |
2310 | ret = rdma_bind_addr(id, sa); | |
2311 | if (ret) { | |
24f412dd | 2312 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
2313 | goto out_id; |
2314 | } | |
2315 | ||
992607e8 | 2316 | ret = rdma_listen(id, 0); |
ca6c1d82 | 2317 | if (ret) { |
24f412dd | 2318 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
2319 | goto out_id; |
2320 | } | |
2321 | ||
2322 | return id; | |
2323 | out_id: | |
2324 | rdma_destroy_id(id); | |
2325 | out: | |
2326 | return ERR_PTR(ret); | |
2327 | } | |
2328 | ||
b8d26b3b NB |
2329 | static int |
2330 | isert_setup_np(struct iscsi_np *np, | |
13a3cf08 | 2331 | struct sockaddr_storage *ksockaddr) |
b8d26b3b NB |
2332 | { |
2333 | struct isert_np *isert_np; | |
2334 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
2335 | int ret; |
2336 | ||
2337 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
93b80f29 | 2338 | if (!isert_np) |
b8d26b3b | 2339 | return -ENOMEM; |
93b80f29 | 2340 | |
ed8cb0a4 JD |
2341 | sema_init(&isert_np->sem, 0); |
2342 | mutex_init(&isert_np->mutex); | |
bd379220 JD |
2343 | INIT_LIST_HEAD(&isert_np->accepted); |
2344 | INIT_LIST_HEAD(&isert_np->pending); | |
ca6c1d82 | 2345 | isert_np->np = np; |
b8d26b3b | 2346 | |
b8d26b3b NB |
2347 | /* |
2348 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
2349 | * in iscsi_target_configfs.c code.. | |
2350 | */ | |
2351 | memcpy(&np->np_sockaddr, ksockaddr, | |
13a3cf08 | 2352 | sizeof(struct sockaddr_storage)); |
b8d26b3b | 2353 | |
ca6c1d82 | 2354 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 2355 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
2356 | ret = PTR_ERR(isert_lid); |
2357 | goto out; | |
2358 | } | |
2359 | ||
ed8cb0a4 | 2360 | isert_np->cm_id = isert_lid; |
b8d26b3b | 2361 | np->np_context = isert_np; |
b8d26b3b NB |
2362 | |
2363 | return 0; | |
2364 | ||
b8d26b3b NB |
2365 | out: |
2366 | kfree(isert_np); | |
ca6c1d82 | 2367 | |
b8d26b3b NB |
2368 | return ret; |
2369 | } | |
2370 | ||
b8d26b3b NB |
2371 | static int |
2372 | isert_rdma_accept(struct isert_conn *isert_conn) | |
2373 | { | |
dac6ab30 | 2374 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
2375 | struct rdma_conn_param cp; |
2376 | int ret; | |
13bce482 | 2377 | struct iser_cm_hdr rsp_hdr; |
b8d26b3b NB |
2378 | |
2379 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
2380 | cp.initiator_depth = isert_conn->initiator_depth; |
2381 | cp.retry_count = 7; | |
2382 | cp.rnr_retry_count = 7; | |
2383 | ||
13bce482 | 2384 | memset(&rsp_hdr, 0, sizeof(rsp_hdr)); |
422bd0ac JD |
2385 | rsp_hdr.flags = ISERT_ZBVA_NOT_USED; |
2386 | if (!isert_conn->snd_w_inv) | |
2387 | rsp_hdr.flags = rsp_hdr.flags | ISERT_SEND_W_INV_NOT_USED; | |
13bce482 JD |
2388 | cp.private_data = (void *)&rsp_hdr; |
2389 | cp.private_data_len = sizeof(rsp_hdr); | |
2390 | ||
b8d26b3b NB |
2391 | ret = rdma_accept(cm_id, &cp); |
2392 | if (ret) { | |
24f412dd | 2393 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
2394 | return ret; |
2395 | } | |
2396 | ||
b8d26b3b NB |
2397 | return 0; |
2398 | } | |
2399 | ||
2400 | static int | |
2401 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
2402 | { | |
6700425e | 2403 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2404 | int ret; |
2405 | ||
24f412dd | 2406 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
2407 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
2408 | if (ret) { | |
24f412dd | 2409 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
2410 | isert_conn); |
2411 | return ret; | |
2412 | } | |
2413 | reinit_completion(&isert_conn->login_req_comp); | |
2414 | ||
6faaa85f NB |
2415 | /* |
2416 | * For login requests after the first PDU, isert_rx_login_req() will | |
2417 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
2418 | * received, which turns this callback from iscsi_target_do_login_rx() | |
2419 | * into a NOP. | |
2420 | */ | |
2421 | if (!login->first_request) | |
2422 | return 0; | |
b8d26b3b | 2423 | |
2371e5da SG |
2424 | isert_rx_login_req(isert_conn); |
2425 | ||
dac6ab30 SG |
2426 | isert_info("before login_comp conn: %p\n", conn); |
2427 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
2428 | if (ret) |
2429 | return ret; | |
2430 | ||
24f412dd | 2431 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 2432 | |
b8d26b3b NB |
2433 | return 0; |
2434 | } | |
2435 | ||
2436 | static void | |
2437 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
2438 | struct isert_conn *isert_conn) | |
2439 | { | |
dac6ab30 | 2440 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b | 2441 | struct rdma_route *cm_route = &cm_id->route; |
b8d26b3b NB |
2442 | |
2443 | conn->login_family = np->np_sockaddr.ss_family; | |
2444 | ||
dc58f760 AG |
2445 | conn->login_sockaddr = cm_route->addr.dst_addr; |
2446 | conn->local_sockaddr = cm_route->addr.src_addr; | |
b8d26b3b NB |
2447 | } |
2448 | ||
2449 | static int | |
2450 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
2451 | { | |
6700425e | 2452 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 2453 | struct isert_conn *isert_conn; |
c6b8e918 | 2454 | int ret; |
b8d26b3b NB |
2455 | |
2456 | accept_wait: | |
ed8cb0a4 | 2457 | ret = down_interruptible(&isert_np->sem); |
c6b8e918 | 2458 | if (ret) |
b8d26b3b NB |
2459 | return -ENODEV; |
2460 | ||
2461 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 2462 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 2463 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 2464 | isert_dbg("np_thread_state %d\n", |
e346ab34 SG |
2465 | np->np_thread_state); |
2466 | /** | |
2467 | * No point in stalling here when np_thread | |
2468 | * is in state RESET/SHUTDOWN/EXIT - bail | |
2469 | **/ | |
b8d26b3b NB |
2470 | return -ENODEV; |
2471 | } | |
2472 | spin_unlock_bh(&np->np_thread_lock); | |
2473 | ||
ed8cb0a4 | 2474 | mutex_lock(&isert_np->mutex); |
bd379220 | 2475 | if (list_empty(&isert_np->pending)) { |
ed8cb0a4 | 2476 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
2477 | goto accept_wait; |
2478 | } | |
bd379220 JD |
2479 | isert_conn = list_first_entry(&isert_np->pending, |
2480 | struct isert_conn, node); | |
2481 | list_del_init(&isert_conn->node); | |
ed8cb0a4 | 2482 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
2483 | |
2484 | conn->context = isert_conn; | |
2485 | isert_conn->conn = conn; | |
aea92980 | 2486 | isert_conn->state = ISER_CONN_BOUND; |
b8d26b3b | 2487 | |
b8d26b3b NB |
2488 | isert_set_conn_info(np, conn, isert_conn); |
2489 | ||
24f412dd | 2490 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 2491 | |
b8d26b3b NB |
2492 | return 0; |
2493 | } | |
2494 | ||
2495 | static void | |
2496 | isert_free_np(struct iscsi_np *np) | |
2497 | { | |
6700425e | 2498 | struct isert_np *isert_np = np->np_context; |
268e6811 | 2499 | struct isert_conn *isert_conn, *n; |
b8d26b3b | 2500 | |
ed8cb0a4 JD |
2501 | if (isert_np->cm_id) |
2502 | rdma_destroy_id(isert_np->cm_id); | |
b8d26b3b | 2503 | |
268e6811 SG |
2504 | /* |
2505 | * FIXME: At this point we don't have a good way to insure | |
2506 | * that at this point we don't have hanging connections that | |
2507 | * completed RDMA establishment but didn't start iscsi login | |
2508 | * process. So work-around this by cleaning up what ever piled | |
bd379220 | 2509 | * up in accepted and pending lists. |
268e6811 | 2510 | */ |
ed8cb0a4 | 2511 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
2512 | if (!list_empty(&isert_np->pending)) { |
2513 | isert_info("Still have isert pending connections\n"); | |
2514 | list_for_each_entry_safe(isert_conn, n, | |
2515 | &isert_np->pending, | |
2516 | node) { | |
2517 | isert_info("cleaning isert_conn %p state (%d)\n", | |
2518 | isert_conn, isert_conn->state); | |
2519 | isert_connect_release(isert_conn); | |
2520 | } | |
2521 | } | |
2522 | ||
2523 | if (!list_empty(&isert_np->accepted)) { | |
2524 | isert_info("Still have isert accepted connections\n"); | |
268e6811 | 2525 | list_for_each_entry_safe(isert_conn, n, |
bd379220 JD |
2526 | &isert_np->accepted, |
2527 | node) { | |
24f412dd | 2528 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 SG |
2529 | isert_conn, isert_conn->state); |
2530 | isert_connect_release(isert_conn); | |
2531 | } | |
2532 | } | |
ed8cb0a4 | 2533 | mutex_unlock(&isert_np->mutex); |
268e6811 | 2534 | |
b8d26b3b NB |
2535 | np->np_context = NULL; |
2536 | kfree(isert_np); | |
2537 | } | |
2538 | ||
b02efbfc SG |
2539 | static void isert_release_work(struct work_struct *work) |
2540 | { | |
2541 | struct isert_conn *isert_conn = container_of(work, | |
2542 | struct isert_conn, | |
2543 | release_work); | |
2544 | ||
24f412dd | 2545 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 2546 | |
dac6ab30 | 2547 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 2548 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 2549 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 2550 | |
24f412dd | 2551 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
2552 | isert_put_conn(isert_conn); |
2553 | } | |
2554 | ||
991bb764 SG |
2555 | static void |
2556 | isert_wait4logout(struct isert_conn *isert_conn) | |
2557 | { | |
2558 | struct iscsi_conn *conn = isert_conn->conn; | |
2559 | ||
4c22e07f SG |
2560 | isert_info("conn %p\n", isert_conn); |
2561 | ||
991bb764 | 2562 | if (isert_conn->logout_posted) { |
24f412dd | 2563 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
2564 | wait_for_completion_timeout(&conn->conn_logout_comp, |
2565 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
2566 | } | |
2567 | } | |
2568 | ||
c7e160ee SG |
2569 | static void |
2570 | isert_wait4cmds(struct iscsi_conn *conn) | |
2571 | { | |
4c22e07f SG |
2572 | isert_info("iscsi_conn %p\n", conn); |
2573 | ||
c7e160ee SG |
2574 | if (conn->sess) { |
2575 | target_sess_cmd_list_set_waiting(conn->sess->se_sess); | |
2576 | target_wait_for_sess_cmds(conn->sess->se_sess); | |
2577 | } | |
2578 | } | |
2579 | ||
3e03c4b0 JD |
2580 | /** |
2581 | * isert_put_unsol_pending_cmds() - Drop commands waiting for | |
2582 | * unsolicitate dataout | |
2583 | * @conn: iscsi connection | |
2584 | * | |
2585 | * We might still have commands that are waiting for unsolicited | |
2586 | * dataouts messages. We must put the extra reference on those | |
2587 | * before blocking on the target_wait_for_session_cmds | |
2588 | */ | |
2589 | static void | |
2590 | isert_put_unsol_pending_cmds(struct iscsi_conn *conn) | |
2591 | { | |
2592 | struct iscsi_cmd *cmd, *tmp; | |
2593 | static LIST_HEAD(drop_cmd_list); | |
2594 | ||
2595 | spin_lock_bh(&conn->cmd_lock); | |
2596 | list_for_each_entry_safe(cmd, tmp, &conn->conn_cmd_list, i_conn_node) { | |
2597 | if ((cmd->cmd_flags & ICF_NON_IMMEDIATE_UNSOLICITED_DATA) && | |
2598 | (cmd->write_data_done < conn->sess->sess_ops->FirstBurstLength) && | |
2599 | (cmd->write_data_done < cmd->se_cmd.data_length)) | |
2600 | list_move_tail(&cmd->i_conn_node, &drop_cmd_list); | |
2601 | } | |
2602 | spin_unlock_bh(&conn->cmd_lock); | |
2603 | ||
2604 | list_for_each_entry_safe(cmd, tmp, &drop_cmd_list, i_conn_node) { | |
2605 | list_del_init(&cmd->i_conn_node); | |
2606 | if (cmd->i_state != ISTATE_REMOVE) { | |
2607 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
2608 | ||
2609 | isert_info("conn %p dropping cmd %p\n", conn, cmd); | |
2610 | isert_put_cmd(isert_cmd, true); | |
2611 | } | |
2612 | } | |
2613 | } | |
2614 | ||
defd8848 | 2615 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
2616 | { |
2617 | struct isert_conn *isert_conn = conn->context; | |
2618 | ||
4c22e07f | 2619 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 2620 | |
dac6ab30 | 2621 | mutex_lock(&isert_conn->mutex); |
954f2372 | 2622 | isert_conn_terminate(isert_conn); |
dac6ab30 | 2623 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 2624 | |
572a1434 | 2625 | ib_drain_qp(isert_conn->qp); |
3e03c4b0 JD |
2626 | isert_put_unsol_pending_cmds(conn); |
2627 | isert_wait4cmds(conn); | |
991bb764 | 2628 | isert_wait4logout(isert_conn); |
954f2372 | 2629 | |
b02efbfc | 2630 | queue_work(isert_release_wq, &isert_conn->release_work); |
defd8848 NB |
2631 | } |
2632 | ||
2633 | static void isert_free_conn(struct iscsi_conn *conn) | |
2634 | { | |
2635 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b | 2636 | |
572a1434 | 2637 | ib_drain_qp(isert_conn->qp); |
b8d26b3b NB |
2638 | isert_put_conn(isert_conn); |
2639 | } | |
2640 | ||
187e84f7 VP |
2641 | static void isert_get_rx_pdu(struct iscsi_conn *conn) |
2642 | { | |
2643 | struct completion comp; | |
2644 | ||
2645 | init_completion(&comp); | |
2646 | ||
2647 | wait_for_completion_interruptible(&comp); | |
2648 | } | |
2649 | ||
b8d26b3b NB |
2650 | static struct iscsit_transport iser_target_transport = { |
2651 | .name = "IB/iSER", | |
2652 | .transport_type = ISCSI_INFINIBAND, | |
bd027d85 | 2653 | .rdma_shutdown = true, |
d703ce2f | 2654 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
2655 | .owner = THIS_MODULE, |
2656 | .iscsit_setup_np = isert_setup_np, | |
2657 | .iscsit_accept_np = isert_accept_np, | |
2658 | .iscsit_free_np = isert_free_np, | |
defd8848 | 2659 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 2660 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
2661 | .iscsit_get_login_rx = isert_get_login_rx, |
2662 | .iscsit_put_login_tx = isert_put_login_tx, | |
2663 | .iscsit_immediate_queue = isert_immediate_queue, | |
2664 | .iscsit_response_queue = isert_response_queue, | |
2665 | .iscsit_get_dataout = isert_get_dataout, | |
2666 | .iscsit_queue_data_in = isert_put_datain, | |
2667 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 2668 | .iscsit_aborted_task = isert_aborted_task, |
187e84f7 | 2669 | .iscsit_get_rx_pdu = isert_get_rx_pdu, |
e70beee7 | 2670 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
2671 | }; |
2672 | ||
2673 | static int __init isert_init(void) | |
2674 | { | |
2675 | int ret; | |
2676 | ||
631af550 SG |
2677 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
2678 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 2679 | if (!isert_comp_wq) { |
24f412dd | 2680 | isert_err("Unable to allocate isert_comp_wq\n"); |
6f0fae3d | 2681 | return -ENOMEM; |
b8d26b3b NB |
2682 | } |
2683 | ||
b02efbfc SG |
2684 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
2685 | WQ_UNBOUND_MAX_ACTIVE); | |
2686 | if (!isert_release_wq) { | |
24f412dd | 2687 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
2688 | ret = -ENOMEM; |
2689 | goto destroy_comp_wq; | |
2690 | } | |
2691 | ||
b8d26b3b | 2692 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 2693 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 2694 | |
b8d26b3b NB |
2695 | return 0; |
2696 | ||
b02efbfc SG |
2697 | destroy_comp_wq: |
2698 | destroy_workqueue(isert_comp_wq); | |
6f0fae3d | 2699 | |
b8d26b3b NB |
2700 | return ret; |
2701 | } | |
2702 | ||
2703 | static void __exit isert_exit(void) | |
2704 | { | |
f5ebec96 | 2705 | flush_scheduled_work(); |
b02efbfc | 2706 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 2707 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 2708 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 2709 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
b8d26b3b NB |
2710 | } |
2711 | ||
2712 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
9e35eff4 | 2713 | MODULE_VERSION("1.0"); |
b8d26b3b NB |
2714 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
2715 | MODULE_LICENSE("GPL"); | |
2716 | ||
2717 | module_init(isert_init); | |
2718 | module_exit(isert_exit); |