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Commit | Line | Data |
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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 NB |
31 | |
32 | #include "isert_proto.h" | |
33 | #include "ib_isert.h" | |
34 | ||
35 | #define ISERT_MAX_CONN 8 | |
36 | #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN) | |
37 | #define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * 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 | |
d40945d8 VP |
50 | static void |
51 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); | |
52 | static int | |
53 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
54 | struct isert_rdma_wr *wr); | |
59464ef4 | 55 | static void |
a3a5a826 | 56 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); |
59464ef4 | 57 | static int |
a3a5a826 SG |
58 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
59 | struct isert_rdma_wr *wr); | |
f93f3a70 SG |
60 | static int |
61 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); | |
2371e5da SG |
62 | static int |
63 | isert_rdma_post_recvl(struct isert_conn *isert_conn); | |
64 | static int | |
65 | isert_rdma_accept(struct isert_conn *isert_conn); | |
ca6c1d82 | 66 | struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); |
d40945d8 | 67 | |
2f1b6b7d SG |
68 | static void isert_release_work(struct work_struct *work); |
69 | ||
302cc7c3 SG |
70 | static inline bool |
71 | isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) | |
72 | { | |
23a548ee | 73 | return (conn->pi_support && |
302cc7c3 SG |
74 | cmd->prot_op != TARGET_PROT_NORMAL); |
75 | } | |
76 | ||
77 | ||
b8d26b3b NB |
78 | static void |
79 | isert_qp_event_callback(struct ib_event *e, void *context) | |
80 | { | |
6700425e | 81 | struct isert_conn *isert_conn = context; |
b8d26b3b | 82 | |
ea8a1616 SG |
83 | isert_err("%s (%d): conn %p\n", |
84 | ib_event_msg(e->event), e->event, isert_conn); | |
85 | ||
b8d26b3b NB |
86 | switch (e->event) { |
87 | case IB_EVENT_COMM_EST: | |
dac6ab30 | 88 | rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST); |
b8d26b3b NB |
89 | break; |
90 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
4c22e07f | 91 | isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); |
b8d26b3b NB |
92 | break; |
93 | default: | |
94 | break; | |
95 | } | |
96 | } | |
97 | ||
98 | static int | |
99 | isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) | |
100 | { | |
101 | int ret; | |
102 | ||
103 | ret = ib_query_device(ib_dev, devattr); | |
104 | if (ret) { | |
24f412dd | 105 | isert_err("ib_query_device() failed: %d\n", ret); |
b8d26b3b NB |
106 | return ret; |
107 | } | |
24f412dd SG |
108 | isert_dbg("devattr->max_sge: %d\n", devattr->max_sge); |
109 | isert_dbg("devattr->max_sge_rd: %d\n", devattr->max_sge_rd); | |
b8d26b3b NB |
110 | |
111 | return 0; | |
112 | } | |
113 | ||
40fc069a SG |
114 | static struct isert_comp * |
115 | isert_comp_get(struct isert_conn *isert_conn) | |
b8d26b3b | 116 | { |
dac6ab30 | 117 | struct isert_device *device = isert_conn->device; |
4a295bae | 118 | struct isert_comp *comp; |
40fc069a | 119 | int i, min = 0; |
b8d26b3b | 120 | |
b8d26b3b | 121 | mutex_lock(&device_list_mutex); |
4a295bae SG |
122 | for (i = 0; i < device->comps_used; i++) |
123 | if (device->comps[i].active_qps < | |
124 | device->comps[min].active_qps) | |
125 | min = i; | |
126 | comp = &device->comps[min]; | |
127 | comp->active_qps++; | |
40fc069a SG |
128 | mutex_unlock(&device_list_mutex); |
129 | ||
24f412dd | 130 | isert_info("conn %p, using comp %p min_index: %d\n", |
4a295bae | 131 | isert_conn, comp, min); |
40fc069a SG |
132 | |
133 | return comp; | |
134 | } | |
135 | ||
136 | static void | |
137 | isert_comp_put(struct isert_comp *comp) | |
138 | { | |
139 | mutex_lock(&device_list_mutex); | |
140 | comp->active_qps--; | |
b8d26b3b | 141 | mutex_unlock(&device_list_mutex); |
40fc069a SG |
142 | } |
143 | ||
144 | static struct ib_qp * | |
145 | isert_create_qp(struct isert_conn *isert_conn, | |
146 | struct isert_comp *comp, | |
147 | struct rdma_cm_id *cma_id) | |
148 | { | |
dac6ab30 | 149 | struct isert_device *device = isert_conn->device; |
40fc069a SG |
150 | struct ib_qp_init_attr attr; |
151 | int ret; | |
b8d26b3b NB |
152 | |
153 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); | |
154 | attr.event_handler = isert_qp_event_callback; | |
155 | attr.qp_context = isert_conn; | |
6f0fae3d SG |
156 | attr.send_cq = comp->cq; |
157 | attr.recv_cq = comp->cq; | |
b8d26b3b | 158 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; |
bdf20e72 | 159 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; |
b8d26b3b NB |
160 | /* |
161 | * FIXME: Use devattr.max_sge - 2 for max_send_sge as | |
f57915cf OG |
162 | * work-around for RDMA_READs with ConnectX-2. |
163 | * | |
164 | * Also, still make sure to have at least two SGEs for | |
165 | * outgoing control PDU responses. | |
b8d26b3b | 166 | */ |
f57915cf | 167 | attr.cap.max_send_sge = max(2, device->dev_attr.max_sge - 2); |
b8d26b3b NB |
168 | isert_conn->max_sge = attr.cap.max_send_sge; |
169 | ||
170 | attr.cap.max_recv_sge = 1; | |
171 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
172 | attr.qp_type = IB_QPT_RC; | |
570db170 | 173 | if (device->pi_capable) |
d3e125da | 174 | attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; |
b8d26b3b | 175 | |
67cb3949 | 176 | ret = rdma_create_qp(cma_id, device->pd, &attr); |
b8d26b3b | 177 | if (ret) { |
24f412dd | 178 | isert_err("rdma_create_qp failed for cma_id %d\n", ret); |
40fc069a SG |
179 | return ERR_PTR(ret); |
180 | } | |
181 | ||
182 | return cma_id->qp; | |
183 | } | |
184 | ||
185 | static int | |
186 | isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) | |
187 | { | |
188 | struct isert_comp *comp; | |
189 | int ret; | |
190 | ||
191 | comp = isert_comp_get(isert_conn); | |
dac6ab30 SG |
192 | isert_conn->qp = isert_create_qp(isert_conn, comp, cma_id); |
193 | if (IS_ERR(isert_conn->qp)) { | |
194 | ret = PTR_ERR(isert_conn->qp); | |
19e2090f | 195 | goto err; |
b8d26b3b | 196 | } |
b8d26b3b NB |
197 | |
198 | return 0; | |
19e2090f | 199 | err: |
40fc069a | 200 | isert_comp_put(comp); |
19e2090f | 201 | return ret; |
b8d26b3b NB |
202 | } |
203 | ||
204 | static void | |
205 | isert_cq_event_callback(struct ib_event *e, void *context) | |
206 | { | |
4c22e07f | 207 | isert_dbg("event: %d\n", e->event); |
b8d26b3b NB |
208 | } |
209 | ||
210 | static int | |
211 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
212 | { | |
dac6ab30 | 213 | struct isert_device *device = isert_conn->device; |
67cb3949 | 214 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
215 | struct iser_rx_desc *rx_desc; |
216 | struct ib_sge *rx_sg; | |
217 | u64 dma_addr; | |
218 | int i, j; | |
219 | ||
dac6ab30 | 220 | isert_conn->rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * |
b8d26b3b | 221 | sizeof(struct iser_rx_desc), GFP_KERNEL); |
dac6ab30 | 222 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
223 | goto fail; |
224 | ||
dac6ab30 | 225 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
226 | |
227 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
228 | dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, | |
229 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
230 | if (ib_dma_mapping_error(ib_dev, dma_addr)) | |
231 | goto dma_map_fail; | |
232 | ||
233 | rx_desc->dma_addr = dma_addr; | |
234 | ||
235 | rx_sg = &rx_desc->rx_sg; | |
236 | rx_sg->addr = rx_desc->dma_addr; | |
237 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; | |
34efc7df | 238 | rx_sg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
239 | } |
240 | ||
dac6ab30 | 241 | isert_conn->rx_desc_head = 0; |
4c22e07f | 242 | |
b8d26b3b NB |
243 | return 0; |
244 | ||
245 | dma_map_fail: | |
dac6ab30 | 246 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
247 | for (j = 0; j < i; j++, rx_desc++) { |
248 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
249 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
250 | } | |
dac6ab30 SG |
251 | kfree(isert_conn->rx_descs); |
252 | isert_conn->rx_descs = NULL; | |
b8d26b3b | 253 | fail: |
4c22e07f SG |
254 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
255 | ||
b8d26b3b NB |
256 | return -ENOMEM; |
257 | } | |
258 | ||
259 | static void | |
260 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
261 | { | |
dac6ab30 | 262 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
263 | struct iser_rx_desc *rx_desc; |
264 | int i; | |
265 | ||
dac6ab30 | 266 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
267 | return; |
268 | ||
dac6ab30 | 269 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
270 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
271 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
272 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
273 | } | |
274 | ||
dac6ab30 SG |
275 | kfree(isert_conn->rx_descs); |
276 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
277 | } |
278 | ||
6f0fae3d SG |
279 | static void isert_cq_work(struct work_struct *); |
280 | static void isert_cq_callback(struct ib_cq *, void *); | |
b8d26b3b | 281 | |
172369c5 SG |
282 | static void |
283 | isert_free_comps(struct isert_device *device) | |
b8d26b3b | 284 | { |
172369c5 | 285 | int i; |
59464ef4 | 286 | |
172369c5 SG |
287 | for (i = 0; i < device->comps_used; i++) { |
288 | struct isert_comp *comp = &device->comps[i]; | |
b1a5ad00 | 289 | |
172369c5 SG |
290 | if (comp->cq) { |
291 | cancel_work_sync(&comp->work); | |
292 | ib_destroy_cq(comp->cq); | |
293 | } | |
59464ef4 | 294 | } |
172369c5 SG |
295 | kfree(device->comps); |
296 | } | |
d40945d8 | 297 | |
172369c5 SG |
298 | static int |
299 | isert_alloc_comps(struct isert_device *device, | |
300 | struct ib_device_attr *attr) | |
301 | { | |
302 | int i, max_cqe, ret = 0; | |
d3e125da | 303 | |
4a295bae | 304 | device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), |
172369c5 SG |
305 | device->ib_device->num_comp_vectors)); |
306 | ||
24f412dd | 307 | isert_info("Using %d CQs, %s supports %d vectors support " |
4a295bae SG |
308 | "Fast registration %d pi_capable %d\n", |
309 | device->comps_used, device->ib_device->name, | |
310 | device->ib_device->num_comp_vectors, device->use_fastreg, | |
311 | device->pi_capable); | |
312 | ||
313 | device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), | |
314 | GFP_KERNEL); | |
315 | if (!device->comps) { | |
24f412dd | 316 | isert_err("Unable to allocate completion contexts\n"); |
b8d26b3b NB |
317 | return -ENOMEM; |
318 | } | |
4a295bae | 319 | |
172369c5 SG |
320 | max_cqe = min(ISER_MAX_CQ_LEN, attr->max_cqe); |
321 | ||
4a295bae | 322 | for (i = 0; i < device->comps_used; i++) { |
8e37210b | 323 | struct ib_cq_init_attr cq_attr = {}; |
4a295bae SG |
324 | struct isert_comp *comp = &device->comps[i]; |
325 | ||
326 | comp->device = device; | |
6f0fae3d | 327 | INIT_WORK(&comp->work, isert_cq_work); |
8e37210b MB |
328 | cq_attr.cqe = max_cqe; |
329 | cq_attr.comp_vector = i; | |
6f0fae3d SG |
330 | comp->cq = ib_create_cq(device->ib_device, |
331 | isert_cq_callback, | |
332 | isert_cq_event_callback, | |
333 | (void *)comp, | |
8e37210b | 334 | &cq_attr); |
6f0fae3d | 335 | if (IS_ERR(comp->cq)) { |
172369c5 | 336 | isert_err("Unable to allocate cq\n"); |
6f0fae3d SG |
337 | ret = PTR_ERR(comp->cq); |
338 | comp->cq = NULL; | |
b8d26b3b | 339 | goto out_cq; |
94a71110 | 340 | } |
b8d26b3b | 341 | |
6f0fae3d | 342 | ret = ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
94a71110 | 343 | if (ret) |
b8d26b3b NB |
344 | goto out_cq; |
345 | } | |
346 | ||
172369c5 SG |
347 | return 0; |
348 | out_cq: | |
349 | isert_free_comps(device); | |
350 | return ret; | |
351 | } | |
352 | ||
353 | static int | |
354 | isert_create_device_ib_res(struct isert_device *device) | |
355 | { | |
172369c5 | 356 | struct ib_device_attr *dev_attr; |
fd8205e8 | 357 | int ret; |
172369c5 SG |
358 | |
359 | dev_attr = &device->dev_attr; | |
fd8205e8 | 360 | ret = isert_query_device(device->ib_device, dev_attr); |
172369c5 SG |
361 | if (ret) |
362 | return ret; | |
363 | ||
364 | /* asign function handlers */ | |
365 | if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS && | |
366 | dev_attr->device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) { | |
367 | device->use_fastreg = 1; | |
368 | device->reg_rdma_mem = isert_reg_rdma; | |
369 | device->unreg_rdma_mem = isert_unreg_rdma; | |
370 | } else { | |
371 | device->use_fastreg = 0; | |
372 | device->reg_rdma_mem = isert_map_rdma; | |
373 | device->unreg_rdma_mem = isert_unmap_cmd; | |
374 | } | |
375 | ||
376 | ret = isert_alloc_comps(device, dev_attr); | |
377 | if (ret) | |
378 | return ret; | |
379 | ||
67cb3949 SG |
380 | device->pd = ib_alloc_pd(device->ib_device); |
381 | if (IS_ERR(device->pd)) { | |
382 | ret = PTR_ERR(device->pd); | |
383 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
384 | device, ret); | |
385 | goto out_cq; | |
386 | } | |
387 | ||
172369c5 SG |
388 | /* Check signature cap */ |
389 | device->pi_capable = dev_attr->device_cap_flags & | |
390 | IB_DEVICE_SIGNATURE_HANDOVER ? true : false; | |
67cb3949 | 391 | |
b8d26b3b NB |
392 | return 0; |
393 | ||
394 | out_cq: | |
172369c5 | 395 | isert_free_comps(device); |
b8d26b3b NB |
396 | return ret; |
397 | } | |
398 | ||
399 | static void | |
400 | isert_free_device_ib_res(struct isert_device *device) | |
401 | { | |
24f412dd | 402 | isert_info("device %p\n", device); |
b8d26b3b | 403 | |
67cb3949 | 404 | ib_dealloc_pd(device->pd); |
172369c5 | 405 | isert_free_comps(device); |
b8d26b3b NB |
406 | } |
407 | ||
408 | static void | |
cf8ae958 | 409 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
410 | { |
411 | mutex_lock(&device_list_mutex); | |
412 | device->refcount--; | |
4c22e07f | 413 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
414 | if (!device->refcount) { |
415 | isert_free_device_ib_res(device); | |
416 | list_del(&device->dev_node); | |
417 | kfree(device); | |
418 | } | |
419 | mutex_unlock(&device_list_mutex); | |
420 | } | |
421 | ||
422 | static struct isert_device * | |
cf8ae958 | 423 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
424 | { |
425 | struct isert_device *device; | |
426 | int ret; | |
427 | ||
428 | mutex_lock(&device_list_mutex); | |
429 | list_for_each_entry(device, &device_list, dev_node) { | |
430 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
431 | device->refcount++; | |
4c22e07f SG |
432 | isert_info("Found iser device %p refcount %d\n", |
433 | device, device->refcount); | |
b8d26b3b NB |
434 | mutex_unlock(&device_list_mutex); |
435 | return device; | |
436 | } | |
437 | } | |
438 | ||
439 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
440 | if (!device) { | |
441 | mutex_unlock(&device_list_mutex); | |
442 | return ERR_PTR(-ENOMEM); | |
443 | } | |
444 | ||
445 | INIT_LIST_HEAD(&device->dev_node); | |
446 | ||
447 | device->ib_device = cma_id->device; | |
448 | ret = isert_create_device_ib_res(device); | |
449 | if (ret) { | |
450 | kfree(device); | |
451 | mutex_unlock(&device_list_mutex); | |
452 | return ERR_PTR(ret); | |
453 | } | |
454 | ||
455 | device->refcount++; | |
456 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
457 | isert_info("Created a new iser device %p refcount %d\n", |
458 | device, device->refcount); | |
b8d26b3b NB |
459 | mutex_unlock(&device_list_mutex); |
460 | ||
461 | return device; | |
462 | } | |
463 | ||
59464ef4 | 464 | static void |
a3a5a826 | 465 | isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
466 | { |
467 | struct fast_reg_descriptor *fr_desc, *tmp; | |
468 | int i = 0; | |
469 | ||
dac6ab30 | 470 | if (list_empty(&isert_conn->fr_pool)) |
59464ef4 VP |
471 | return; |
472 | ||
4c22e07f | 473 | isert_info("Freeing conn %p fastreg pool", isert_conn); |
59464ef4 VP |
474 | |
475 | list_for_each_entry_safe(fr_desc, tmp, | |
dac6ab30 | 476 | &isert_conn->fr_pool, list) { |
59464ef4 VP |
477 | list_del(&fr_desc->list); |
478 | ib_free_fast_reg_page_list(fr_desc->data_frpl); | |
479 | ib_dereg_mr(fr_desc->data_mr); | |
d3e125da SG |
480 | if (fr_desc->pi_ctx) { |
481 | ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl); | |
482 | ib_dereg_mr(fr_desc->pi_ctx->prot_mr); | |
8b91ffc1 | 483 | ib_dereg_mr(fr_desc->pi_ctx->sig_mr); |
d3e125da SG |
484 | kfree(fr_desc->pi_ctx); |
485 | } | |
59464ef4 VP |
486 | kfree(fr_desc); |
487 | ++i; | |
488 | } | |
489 | ||
dac6ab30 | 490 | if (i < isert_conn->fr_pool_size) |
24f412dd | 491 | isert_warn("Pool still has %d regions registered\n", |
dac6ab30 | 492 | isert_conn->fr_pool_size - i); |
59464ef4 VP |
493 | } |
494 | ||
570db170 SG |
495 | static int |
496 | isert_create_pi_ctx(struct fast_reg_descriptor *desc, | |
497 | struct ib_device *device, | |
498 | struct ib_pd *pd) | |
499 | { | |
570db170 SG |
500 | struct pi_context *pi_ctx; |
501 | int ret; | |
502 | ||
503 | pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL); | |
504 | if (!pi_ctx) { | |
24f412dd | 505 | isert_err("Failed to allocate pi context\n"); |
570db170 SG |
506 | return -ENOMEM; |
507 | } | |
508 | ||
509 | pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(device, | |
510 | ISCSI_ISER_SG_TABLESIZE); | |
511 | if (IS_ERR(pi_ctx->prot_frpl)) { | |
24f412dd | 512 | isert_err("Failed to allocate prot frpl err=%ld\n", |
570db170 SG |
513 | PTR_ERR(pi_ctx->prot_frpl)); |
514 | ret = PTR_ERR(pi_ctx->prot_frpl); | |
515 | goto err_pi_ctx; | |
516 | } | |
517 | ||
a89be2cc SG |
518 | pi_ctx->prot_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, |
519 | ISCSI_ISER_SG_TABLESIZE); | |
570db170 | 520 | if (IS_ERR(pi_ctx->prot_mr)) { |
24f412dd | 521 | isert_err("Failed to allocate prot frmr err=%ld\n", |
570db170 SG |
522 | PTR_ERR(pi_ctx->prot_mr)); |
523 | ret = PTR_ERR(pi_ctx->prot_mr); | |
524 | goto err_prot_frpl; | |
525 | } | |
526 | desc->ind |= ISERT_PROT_KEY_VALID; | |
527 | ||
9bee178b | 528 | pi_ctx->sig_mr = ib_alloc_mr(pd, IB_MR_TYPE_SIGNATURE, 2); |
570db170 | 529 | if (IS_ERR(pi_ctx->sig_mr)) { |
24f412dd | 530 | isert_err("Failed to allocate signature enabled mr err=%ld\n", |
570db170 SG |
531 | PTR_ERR(pi_ctx->sig_mr)); |
532 | ret = PTR_ERR(pi_ctx->sig_mr); | |
533 | goto err_prot_mr; | |
534 | } | |
535 | ||
536 | desc->pi_ctx = pi_ctx; | |
537 | desc->ind |= ISERT_SIG_KEY_VALID; | |
538 | desc->ind &= ~ISERT_PROTECTED; | |
539 | ||
540 | return 0; | |
541 | ||
542 | err_prot_mr: | |
b2feda4f | 543 | ib_dereg_mr(pi_ctx->prot_mr); |
570db170 | 544 | err_prot_frpl: |
b2feda4f | 545 | ib_free_fast_reg_page_list(pi_ctx->prot_frpl); |
570db170 | 546 | err_pi_ctx: |
b2feda4f | 547 | kfree(pi_ctx); |
570db170 SG |
548 | |
549 | return ret; | |
550 | } | |
551 | ||
dc87a90f SG |
552 | static int |
553 | isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, | |
570db170 | 554 | struct fast_reg_descriptor *fr_desc) |
dc87a90f | 555 | { |
d3e125da SG |
556 | int ret; |
557 | ||
dc87a90f SG |
558 | fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device, |
559 | ISCSI_ISER_SG_TABLESIZE); | |
560 | if (IS_ERR(fr_desc->data_frpl)) { | |
24f412dd | 561 | isert_err("Failed to allocate data frpl err=%ld\n", |
4c22e07f | 562 | PTR_ERR(fr_desc->data_frpl)); |
dc87a90f SG |
563 | return PTR_ERR(fr_desc->data_frpl); |
564 | } | |
565 | ||
a89be2cc SG |
566 | fr_desc->data_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, |
567 | ISCSI_ISER_SG_TABLESIZE); | |
dc87a90f | 568 | if (IS_ERR(fr_desc->data_mr)) { |
24f412dd | 569 | isert_err("Failed to allocate data frmr err=%ld\n", |
4c22e07f | 570 | PTR_ERR(fr_desc->data_mr)); |
d3e125da SG |
571 | ret = PTR_ERR(fr_desc->data_mr); |
572 | goto err_data_frpl; | |
dc87a90f | 573 | } |
d3e125da SG |
574 | fr_desc->ind |= ISERT_DATA_KEY_VALID; |
575 | ||
24f412dd | 576 | isert_dbg("Created fr_desc %p\n", fr_desc); |
dc87a90f SG |
577 | |
578 | return 0; | |
570db170 | 579 | |
d3e125da SG |
580 | err_data_frpl: |
581 | ib_free_fast_reg_page_list(fr_desc->data_frpl); | |
582 | ||
583 | return ret; | |
59464ef4 VP |
584 | } |
585 | ||
586 | static int | |
570db170 | 587 | isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
588 | { |
589 | struct fast_reg_descriptor *fr_desc; | |
dac6ab30 | 590 | struct isert_device *device = isert_conn->device; |
f46d6a8a NB |
591 | struct se_session *se_sess = isert_conn->conn->sess->se_sess; |
592 | struct se_node_acl *se_nacl = se_sess->se_node_acl; | |
593 | int i, ret, tag_num; | |
594 | /* | |
595 | * Setup the number of FRMRs based upon the number of tags | |
596 | * available to session in iscsi_target_locate_portal(). | |
597 | */ | |
598 | tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth); | |
599 | tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; | |
59464ef4 | 600 | |
dac6ab30 | 601 | isert_conn->fr_pool_size = 0; |
f46d6a8a | 602 | for (i = 0; i < tag_num; i++) { |
59464ef4 VP |
603 | fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); |
604 | if (!fr_desc) { | |
24f412dd | 605 | isert_err("Failed to allocate fast_reg descriptor\n"); |
59464ef4 VP |
606 | ret = -ENOMEM; |
607 | goto err; | |
608 | } | |
609 | ||
dc87a90f | 610 | ret = isert_create_fr_desc(device->ib_device, |
67cb3949 | 611 | device->pd, fr_desc); |
dc87a90f | 612 | if (ret) { |
24f412dd | 613 | isert_err("Failed to create fastreg descriptor err=%d\n", |
dc87a90f | 614 | ret); |
a80e21b3 | 615 | kfree(fr_desc); |
59464ef4 VP |
616 | goto err; |
617 | } | |
59464ef4 | 618 | |
dac6ab30 SG |
619 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); |
620 | isert_conn->fr_pool_size++; | |
59464ef4 VP |
621 | } |
622 | ||
24f412dd | 623 | isert_dbg("Creating conn %p fastreg pool size=%d", |
dac6ab30 | 624 | isert_conn, isert_conn->fr_pool_size); |
59464ef4 VP |
625 | |
626 | return 0; | |
627 | ||
628 | err: | |
a3a5a826 | 629 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 VP |
630 | return ret; |
631 | } | |
632 | ||
ae9ea9ed SG |
633 | static void |
634 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 635 | { |
b8d26b3b | 636 | isert_conn->state = ISER_CONN_INIT; |
dac6ab30 SG |
637 | INIT_LIST_HEAD(&isert_conn->accept_node); |
638 | init_completion(&isert_conn->login_comp); | |
2371e5da | 639 | init_completion(&isert_conn->login_req_comp); |
dac6ab30 SG |
640 | init_completion(&isert_conn->wait); |
641 | kref_init(&isert_conn->kref); | |
642 | mutex_init(&isert_conn->mutex); | |
643 | spin_lock_init(&isert_conn->pool_lock); | |
644 | INIT_LIST_HEAD(&isert_conn->fr_pool); | |
2f1b6b7d | 645 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
ae9ea9ed | 646 | } |
b8d26b3b | 647 | |
ae9ea9ed SG |
648 | static void |
649 | isert_free_login_buf(struct isert_conn *isert_conn) | |
650 | { | |
dac6ab30 | 651 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
652 | |
653 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
654 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
655 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
656 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
657 | DMA_FROM_DEVICE); | |
658 | kfree(isert_conn->login_buf); | |
659 | } | |
660 | ||
661 | static int | |
662 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
663 | struct ib_device *ib_dev) | |
664 | { | |
665 | int ret; | |
b8d26b3b NB |
666 | |
667 | isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + | |
668 | ISER_RX_LOGIN_SIZE, GFP_KERNEL); | |
669 | if (!isert_conn->login_buf) { | |
24f412dd | 670 | isert_err("Unable to allocate isert_conn->login_buf\n"); |
ae9ea9ed | 671 | return -ENOMEM; |
b8d26b3b NB |
672 | } |
673 | ||
674 | isert_conn->login_req_buf = isert_conn->login_buf; | |
675 | isert_conn->login_rsp_buf = isert_conn->login_buf + | |
676 | ISCSI_DEF_MAX_RECV_SEG_LEN; | |
ae9ea9ed | 677 | |
24f412dd | 678 | isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", |
b8d26b3b NB |
679 | isert_conn->login_buf, isert_conn->login_req_buf, |
680 | isert_conn->login_rsp_buf); | |
681 | ||
682 | isert_conn->login_req_dma = ib_dma_map_single(ib_dev, | |
683 | (void *)isert_conn->login_req_buf, | |
684 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
685 | ||
686 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); | |
687 | if (ret) { | |
ae9ea9ed | 688 | isert_err("login_req_dma mapping error: %d\n", ret); |
b8d26b3b NB |
689 | isert_conn->login_req_dma = 0; |
690 | goto out_login_buf; | |
691 | } | |
692 | ||
693 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
694 | (void *)isert_conn->login_rsp_buf, | |
695 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
696 | ||
697 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); | |
698 | if (ret) { | |
ae9ea9ed | 699 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b NB |
700 | isert_conn->login_rsp_dma = 0; |
701 | goto out_req_dma_map; | |
702 | } | |
703 | ||
ae9ea9ed SG |
704 | return 0; |
705 | ||
706 | out_req_dma_map: | |
707 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
708 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
709 | out_login_buf: | |
710 | kfree(isert_conn->login_buf); | |
711 | return ret; | |
712 | } | |
713 | ||
714 | static int | |
715 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
716 | { | |
717 | struct isert_np *isert_np = cma_id->context; | |
718 | struct iscsi_np *np = isert_np->np; | |
719 | struct isert_conn *isert_conn; | |
720 | struct isert_device *device; | |
721 | int ret = 0; | |
722 | ||
723 | spin_lock_bh(&np->np_thread_lock); | |
724 | if (!np->enabled) { | |
725 | spin_unlock_bh(&np->np_thread_lock); | |
726 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
727 | return rdma_reject(cma_id, NULL, 0); | |
728 | } | |
729 | spin_unlock_bh(&np->np_thread_lock); | |
730 | ||
731 | isert_dbg("cma_id: %p, portal: %p\n", | |
732 | cma_id, cma_id->context); | |
733 | ||
734 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
735 | if (!isert_conn) | |
736 | return -ENOMEM; | |
737 | ||
738 | isert_init_conn(isert_conn); | |
dac6ab30 | 739 | isert_conn->cm_id = cma_id; |
ae9ea9ed SG |
740 | |
741 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); | |
742 | if (ret) | |
743 | goto out; | |
744 | ||
cf8ae958 | 745 | device = isert_device_get(cma_id); |
b8d26b3b NB |
746 | if (IS_ERR(device)) { |
747 | ret = PTR_ERR(device); | |
748 | goto out_rsp_dma_map; | |
749 | } | |
dac6ab30 | 750 | isert_conn->device = device; |
b8d26b3b | 751 | |
1a92e17e SG |
752 | /* Set max inflight RDMA READ requests */ |
753 | isert_conn->initiator_depth = min_t(u8, | |
754 | event->param.conn.initiator_depth, | |
755 | device->dev_attr.max_qp_init_rd_atom); | |
24f412dd | 756 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); |
1a92e17e | 757 | |
570db170 | 758 | ret = isert_conn_setup_qp(isert_conn, cma_id); |
b8d26b3b NB |
759 | if (ret) |
760 | goto out_conn_dev; | |
761 | ||
2371e5da SG |
762 | ret = isert_rdma_post_recvl(isert_conn); |
763 | if (ret) | |
764 | goto out_conn_dev; | |
ce9a9fc2 NB |
765 | /* |
766 | * Obtain the second reference now before isert_rdma_accept() to | |
767 | * ensure that any initiator generated REJECT CM event that occurs | |
768 | * asynchronously won't drop the last reference until the error path | |
769 | * in iscsi_target_login_sess_out() does it's ->iscsit_free_conn() -> | |
770 | * isert_free_conn() -> isert_put_conn() -> kref_put(). | |
771 | */ | |
772 | if (!kref_get_unless_zero(&isert_conn->kref)) { | |
773 | isert_warn("conn %p connect_release is running\n", isert_conn); | |
774 | goto out_conn_dev; | |
775 | } | |
2371e5da SG |
776 | |
777 | ret = isert_rdma_accept(isert_conn); | |
778 | if (ret) | |
779 | goto out_conn_dev; | |
780 | ||
b8d26b3b | 781 | mutex_lock(&isert_np->np_accept_mutex); |
dac6ab30 | 782 | list_add_tail(&isert_conn->accept_node, &isert_np->np_accept_list); |
b8d26b3b NB |
783 | mutex_unlock(&isert_np->np_accept_mutex); |
784 | ||
24f412dd | 785 | isert_info("np %p: Allow accept_np to continue\n", np); |
531b7bf4 | 786 | up(&isert_np->np_sem); |
b8d26b3b NB |
787 | return 0; |
788 | ||
789 | out_conn_dev: | |
cf8ae958 | 790 | isert_device_put(device); |
b8d26b3b | 791 | out_rsp_dma_map: |
ae9ea9ed | 792 | isert_free_login_buf(isert_conn); |
b8d26b3b NB |
793 | out: |
794 | kfree(isert_conn); | |
2371e5da | 795 | rdma_reject(cma_id, NULL, 0); |
b8d26b3b NB |
796 | return ret; |
797 | } | |
798 | ||
799 | static void | |
800 | isert_connect_release(struct isert_conn *isert_conn) | |
801 | { | |
dac6ab30 | 802 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 803 | |
4c22e07f | 804 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 805 | |
57df81e3 SG |
806 | BUG_ON(!device); |
807 | ||
808 | if (device->use_fastreg) | |
a3a5a826 | 809 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 | 810 | |
19e2090f | 811 | isert_free_rx_descriptors(isert_conn); |
dac6ab30 SG |
812 | if (isert_conn->cm_id) |
813 | rdma_destroy_id(isert_conn->cm_id); | |
19e2090f | 814 | |
dac6ab30 SG |
815 | if (isert_conn->qp) { |
816 | struct isert_comp *comp = isert_conn->qp->recv_cq->cq_context; | |
4a295bae | 817 | |
40fc069a | 818 | isert_comp_put(comp); |
dac6ab30 | 819 | ib_destroy_qp(isert_conn->qp); |
b8d26b3b NB |
820 | } |
821 | ||
ae9ea9ed SG |
822 | if (isert_conn->login_buf) |
823 | isert_free_login_buf(isert_conn); | |
824 | ||
57df81e3 | 825 | isert_device_put(device); |
b8d26b3b | 826 | |
57df81e3 | 827 | kfree(isert_conn); |
b8d26b3b NB |
828 | } |
829 | ||
830 | static void | |
831 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
832 | { | |
19e2090f | 833 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
c2f88b17 | 834 | |
24f412dd | 835 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 836 | |
dac6ab30 | 837 | mutex_lock(&isert_conn->mutex); |
2371e5da SG |
838 | if (isert_conn->state != ISER_CONN_FULL_FEATURE) |
839 | isert_conn->state = ISER_CONN_UP; | |
dac6ab30 | 840 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
841 | } |
842 | ||
843 | static void | |
dac6ab30 | 844 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
845 | { |
846 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 847 | struct isert_conn, kref); |
b8d26b3b | 848 | |
4c22e07f SG |
849 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
850 | current->pid); | |
b8d26b3b NB |
851 | |
852 | isert_connect_release(isert_conn); | |
853 | } | |
854 | ||
855 | static void | |
856 | isert_put_conn(struct isert_conn *isert_conn) | |
857 | { | |
dac6ab30 | 858 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
859 | } |
860 | ||
954f2372 SG |
861 | /** |
862 | * isert_conn_terminate() - Initiate connection termination | |
863 | * @isert_conn: isert connection struct | |
864 | * | |
865 | * Notes: | |
128e9cc8 | 866 | * In case the connection state is FULL_FEATURE, move state |
954f2372 | 867 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 868 | * In case the connection state is UP, complete flush as well. |
954f2372 | 869 | * |
dac6ab30 | 870 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
871 | * safe to call multiple times. |
872 | */ | |
873 | static void | |
874 | isert_conn_terminate(struct isert_conn *isert_conn) | |
875 | { | |
876 | int err; | |
877 | ||
128e9cc8 SG |
878 | switch (isert_conn->state) { |
879 | case ISER_CONN_TERMINATING: | |
880 | break; | |
881 | case ISER_CONN_UP: | |
128e9cc8 | 882 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ |
24f412dd | 883 | isert_info("Terminating conn %p state %d\n", |
954f2372 | 884 | isert_conn, isert_conn->state); |
128e9cc8 | 885 | isert_conn->state = ISER_CONN_TERMINATING; |
dac6ab30 | 886 | err = rdma_disconnect(isert_conn->cm_id); |
954f2372 | 887 | if (err) |
24f412dd | 888 | isert_warn("Failed rdma_disconnect isert_conn %p\n", |
954f2372 | 889 | isert_conn); |
128e9cc8 SG |
890 | break; |
891 | default: | |
24f412dd | 892 | isert_warn("conn %p teminating in state %d\n", |
128e9cc8 | 893 | isert_conn, isert_conn->state); |
954f2372 SG |
894 | } |
895 | } | |
896 | ||
3b726ae2 | 897 | static int |
ca6c1d82 SG |
898 | isert_np_cma_handler(struct isert_np *isert_np, |
899 | enum rdma_cm_event_type event) | |
b8d26b3b | 900 | { |
ea8a1616 SG |
901 | isert_dbg("%s (%d): isert np %p\n", |
902 | rdma_event_msg(event), event, isert_np); | |
3b726ae2 | 903 | |
ca6c1d82 SG |
904 | switch (event) { |
905 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
3b726ae2 | 906 | isert_np->np_cm_id = NULL; |
ca6c1d82 SG |
907 | break; |
908 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
909 | isert_np->np_cm_id = isert_setup_id(isert_np); | |
910 | if (IS_ERR(isert_np->np_cm_id)) { | |
24f412dd SG |
911 | isert_err("isert np %p setup id failed: %ld\n", |
912 | isert_np, PTR_ERR(isert_np->np_cm_id)); | |
ca6c1d82 SG |
913 | isert_np->np_cm_id = NULL; |
914 | } | |
915 | break; | |
916 | default: | |
24f412dd | 917 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 918 | isert_np, event); |
3b726ae2 SG |
919 | } |
920 | ||
ca6c1d82 SG |
921 | return -1; |
922 | } | |
923 | ||
924 | static int | |
925 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
926 | enum rdma_cm_event_type event) | |
927 | { | |
928 | struct isert_np *isert_np = cma_id->context; | |
929 | struct isert_conn *isert_conn; | |
2f1b6b7d | 930 | bool terminating = false; |
ca6c1d82 SG |
931 | |
932 | if (isert_np->np_cm_id == cma_id) | |
933 | return isert_np_cma_handler(cma_id->context, event); | |
934 | ||
19e2090f | 935 | isert_conn = cma_id->qp->qp_context; |
b8d26b3b | 936 | |
dac6ab30 | 937 | mutex_lock(&isert_conn->mutex); |
2f1b6b7d | 938 | terminating = (isert_conn->state == ISER_CONN_TERMINATING); |
128e9cc8 | 939 | isert_conn_terminate(isert_conn); |
dac6ab30 | 940 | mutex_unlock(&isert_conn->mutex); |
128e9cc8 | 941 | |
dac6ab30 SG |
942 | isert_info("conn %p completing wait\n", isert_conn); |
943 | complete(&isert_conn->wait); | |
3b726ae2 | 944 | |
2f1b6b7d SG |
945 | if (terminating) |
946 | goto out; | |
947 | ||
948 | mutex_lock(&isert_np->np_accept_mutex); | |
949 | if (!list_empty(&isert_conn->accept_node)) { | |
950 | list_del_init(&isert_conn->accept_node); | |
951 | isert_put_conn(isert_conn); | |
952 | queue_work(isert_release_wq, &isert_conn->release_work); | |
953 | } | |
954 | mutex_unlock(&isert_np->np_accept_mutex); | |
955 | ||
956 | out: | |
3b726ae2 | 957 | return 0; |
b8d26b3b NB |
958 | } |
959 | ||
4a579da2 | 960 | static int |
954f2372 SG |
961 | isert_connect_error(struct rdma_cm_id *cma_id) |
962 | { | |
19e2090f | 963 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
954f2372 | 964 | |
dac6ab30 | 965 | isert_conn->cm_id = NULL; |
954f2372 | 966 | isert_put_conn(isert_conn); |
4a579da2 SG |
967 | |
968 | return -1; | |
954f2372 SG |
969 | } |
970 | ||
b8d26b3b NB |
971 | static int |
972 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
973 | { | |
974 | int ret = 0; | |
975 | ||
ea8a1616 SG |
976 | isert_info("%s (%d): status %d id %p np %p\n", |
977 | rdma_event_msg(event->event), event->event, | |
4c22e07f | 978 | event->status, cma_id, cma_id->context); |
b8d26b3b NB |
979 | |
980 | switch (event->event) { | |
981 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
b8d26b3b | 982 | ret = isert_connect_request(cma_id, event); |
3b726ae2 | 983 | if (ret) |
4c22e07f | 984 | isert_err("failed handle connect request %d\n", ret); |
b8d26b3b NB |
985 | break; |
986 | case RDMA_CM_EVENT_ESTABLISHED: | |
b8d26b3b NB |
987 | isert_connected_handler(cma_id); |
988 | break; | |
88c4015f SG |
989 | case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ |
990 | case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ | |
991 | case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */ | |
88c4015f | 992 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 993 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 994 | break; |
954f2372 SG |
995 | case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ |
996 | case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ | |
b8d26b3b | 997 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 998 | ret = isert_connect_error(cma_id); |
954f2372 | 999 | break; |
b8d26b3b | 1000 | default: |
24f412dd | 1001 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
1002 | break; |
1003 | } | |
1004 | ||
b8d26b3b NB |
1005 | return ret; |
1006 | } | |
1007 | ||
1008 | static int | |
1009 | isert_post_recv(struct isert_conn *isert_conn, u32 count) | |
1010 | { | |
1011 | struct ib_recv_wr *rx_wr, *rx_wr_failed; | |
1012 | int i, ret; | |
dac6ab30 | 1013 | unsigned int rx_head = isert_conn->rx_desc_head; |
b8d26b3b NB |
1014 | struct iser_rx_desc *rx_desc; |
1015 | ||
dac6ab30 SG |
1016 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
1017 | rx_desc = &isert_conn->rx_descs[rx_head]; | |
b0a191e7 | 1018 | rx_wr->wr_id = (uintptr_t)rx_desc; |
b8d26b3b NB |
1019 | rx_wr->sg_list = &rx_desc->rx_sg; |
1020 | rx_wr->num_sge = 1; | |
1021 | rx_wr->next = rx_wr + 1; | |
1022 | rx_head = (rx_head + 1) & (ISERT_QP_MAX_RECV_DTOS - 1); | |
1023 | } | |
1024 | ||
1025 | rx_wr--; | |
1026 | rx_wr->next = NULL; /* mark end of work requests list */ | |
1027 | ||
1028 | isert_conn->post_recv_buf_count += count; | |
dac6ab30 | 1029 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, |
b8d26b3b NB |
1030 | &rx_wr_failed); |
1031 | if (ret) { | |
24f412dd | 1032 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
b8d26b3b NB |
1033 | isert_conn->post_recv_buf_count -= count; |
1034 | } else { | |
11378cdb | 1035 | isert_dbg("Posted %d RX buffers\n", count); |
dac6ab30 | 1036 | isert_conn->rx_desc_head = rx_head; |
b8d26b3b NB |
1037 | } |
1038 | return ret; | |
1039 | } | |
1040 | ||
1041 | static int | |
1042 | isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) | |
1043 | { | |
dac6ab30 | 1044 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1045 | struct ib_send_wr send_wr, *send_wr_failed; |
1046 | int ret; | |
1047 | ||
1048 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
1049 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1050 | ||
1051 | send_wr.next = NULL; | |
b0a191e7 | 1052 | send_wr.wr_id = (uintptr_t)tx_desc; |
b8d26b3b NB |
1053 | send_wr.sg_list = tx_desc->tx_sg; |
1054 | send_wr.num_sge = tx_desc->num_sge; | |
1055 | send_wr.opcode = IB_WR_SEND; | |
1056 | send_wr.send_flags = IB_SEND_SIGNALED; | |
1057 | ||
dac6ab30 | 1058 | ret = ib_post_send(isert_conn->qp, &send_wr, &send_wr_failed); |
bdf20e72 | 1059 | if (ret) |
24f412dd | 1060 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
1061 | |
1062 | return ret; | |
1063 | } | |
1064 | ||
1065 | static void | |
1066 | isert_create_send_desc(struct isert_conn *isert_conn, | |
1067 | struct isert_cmd *isert_cmd, | |
1068 | struct iser_tx_desc *tx_desc) | |
1069 | { | |
dac6ab30 | 1070 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1071 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1072 | |
1073 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
1074 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1075 | ||
1076 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); | |
1077 | tx_desc->iser_header.flags = ISER_VER; | |
1078 | ||
1079 | tx_desc->num_sge = 1; | |
1080 | tx_desc->isert_cmd = isert_cmd; | |
1081 | ||
34efc7df JG |
1082 | if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) { |
1083 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; | |
24f412dd | 1084 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
1085 | } |
1086 | } | |
1087 | ||
1088 | static int | |
1089 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
1090 | struct iser_tx_desc *tx_desc) | |
1091 | { | |
dac6ab30 | 1092 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1093 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1094 | u64 dma_addr; |
1095 | ||
1096 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
1097 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1098 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 1099 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
1100 | return -ENOMEM; |
1101 | } | |
1102 | ||
1103 | tx_desc->dma_addr = dma_addr; | |
1104 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
1105 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
34efc7df | 1106 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; |
b8d26b3b | 1107 | |
4c22e07f SG |
1108 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
1109 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
1110 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
1111 | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | static void | |
95b60f07 | 1116 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 1117 | struct ib_send_wr *send_wr) |
b8d26b3b | 1118 | { |
95b60f07 NB |
1119 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
1120 | ||
b8d26b3b | 1121 | isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; |
b0a191e7 | 1122 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
b8d26b3b | 1123 | send_wr->opcode = IB_WR_SEND; |
95b60f07 | 1124 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 1125 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 1126 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
1127 | } |
1128 | ||
1129 | static int | |
1130 | isert_rdma_post_recvl(struct isert_conn *isert_conn) | |
1131 | { | |
1132 | struct ib_recv_wr rx_wr, *rx_wr_fail; | |
1133 | struct ib_sge sge; | |
1134 | int ret; | |
1135 | ||
1136 | memset(&sge, 0, sizeof(struct ib_sge)); | |
1137 | sge.addr = isert_conn->login_req_dma; | |
1138 | sge.length = ISER_RX_LOGIN_SIZE; | |
34efc7df | 1139 | sge.lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b | 1140 | |
24f412dd | 1141 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
1142 | sge.addr, sge.length, sge.lkey); |
1143 | ||
1144 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); | |
b0a191e7 | 1145 | rx_wr.wr_id = (uintptr_t)isert_conn->login_req_buf; |
b8d26b3b NB |
1146 | rx_wr.sg_list = &sge; |
1147 | rx_wr.num_sge = 1; | |
1148 | ||
1149 | isert_conn->post_recv_buf_count++; | |
dac6ab30 | 1150 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_fail); |
b8d26b3b | 1151 | if (ret) { |
24f412dd | 1152 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b NB |
1153 | isert_conn->post_recv_buf_count--; |
1154 | } | |
1155 | ||
b8d26b3b NB |
1156 | return ret; |
1157 | } | |
1158 | ||
1159 | static int | |
1160 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1161 | u32 length) | |
1162 | { | |
1163 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 1164 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1165 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 1166 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
1167 | int ret; |
1168 | ||
1169 | isert_create_send_desc(isert_conn, NULL, tx_desc); | |
1170 | ||
1171 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
1172 | sizeof(struct iscsi_hdr)); | |
1173 | ||
1174 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
1175 | ||
1176 | if (length > 0) { | |
1177 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
1178 | ||
1179 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
1180 | length, DMA_TO_DEVICE); | |
1181 | ||
1182 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
1183 | ||
1184 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
1185 | length, DMA_TO_DEVICE); | |
1186 | ||
1187 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
1188 | tx_dsg->length = length; | |
34efc7df | 1189 | tx_dsg->lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b NB |
1190 | tx_desc->num_sge = 2; |
1191 | } | |
1192 | if (!login->login_failed) { | |
1193 | if (login->login_complete) { | |
e0546fc1 | 1194 | if (!conn->sess->sess_ops->SessionType && |
dac6ab30 | 1195 | isert_conn->device->use_fastreg) { |
570db170 | 1196 | ret = isert_conn_create_fastreg_pool(isert_conn); |
f46d6a8a | 1197 | if (ret) { |
24f412dd | 1198 | isert_err("Conn: %p failed to create" |
f46d6a8a NB |
1199 | " fastreg pool\n", isert_conn); |
1200 | return ret; | |
1201 | } | |
1202 | } | |
1203 | ||
b8d26b3b NB |
1204 | ret = isert_alloc_rx_descriptors(isert_conn); |
1205 | if (ret) | |
1206 | return ret; | |
1207 | ||
1208 | ret = isert_post_recv(isert_conn, ISERT_MIN_POSTED_RX); | |
1209 | if (ret) | |
1210 | return ret; | |
1211 | ||
128e9cc8 | 1212 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 1213 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 1214 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 1215 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
1216 | goto post_send; |
1217 | } | |
1218 | ||
1219 | ret = isert_rdma_post_recvl(isert_conn); | |
1220 | if (ret) | |
1221 | return ret; | |
1222 | } | |
1223 | post_send: | |
1224 | ret = isert_post_send(isert_conn, tx_desc); | |
1225 | if (ret) | |
1226 | return ret; | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | static void | |
2371e5da | 1232 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 1233 | { |
2371e5da SG |
1234 | struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf; |
1235 | int rx_buflen = isert_conn->login_req_len; | |
b8d26b3b NB |
1236 | struct iscsi_conn *conn = isert_conn->conn; |
1237 | struct iscsi_login *login = conn->conn_login; | |
1238 | int size; | |
1239 | ||
24f412dd | 1240 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
1241 | |
1242 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
1243 | |
1244 | if (login->first_request) { | |
1245 | struct iscsi_login_req *login_req = | |
1246 | (struct iscsi_login_req *)&rx_desc->iscsi_header; | |
1247 | /* | |
1248 | * Setup the initial iscsi_login values from the leading | |
1249 | * login request PDU. | |
1250 | */ | |
1251 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
1252 | login->current_stage = | |
1253 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
1254 | >> 2; | |
1255 | login->version_min = login_req->min_version; | |
1256 | login->version_max = login_req->max_version; | |
1257 | memcpy(login->isid, login_req->isid, 6); | |
1258 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1259 | login->init_task_tag = login_req->itt; | |
1260 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1261 | login->cid = be16_to_cpu(login_req->cid); | |
1262 | login->tsih = be16_to_cpu(login_req->tsih); | |
1263 | } | |
1264 | ||
1265 | memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); | |
1266 | ||
1267 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1268 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1269 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1270 | MAX_KEY_VALUE_PAIRS); | |
b8d26b3b NB |
1271 | memcpy(login->req_buf, &rx_desc->data[0], size); |
1272 | ||
6faaa85f | 1273 | if (login->first_request) { |
dac6ab30 | 1274 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1275 | return; |
1276 | } | |
1277 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1278 | } |
1279 | ||
b8d26b3b | 1280 | static struct iscsi_cmd |
676687c6 | 1281 | *isert_allocate_cmd(struct iscsi_conn *conn) |
b8d26b3b | 1282 | { |
6700425e | 1283 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1284 | struct isert_cmd *isert_cmd; |
d703ce2f | 1285 | struct iscsi_cmd *cmd; |
b8d26b3b | 1286 | |
676687c6 | 1287 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1288 | if (!cmd) { |
24f412dd | 1289 | isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); |
b8d26b3b NB |
1290 | return NULL; |
1291 | } | |
d703ce2f | 1292 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1293 | isert_cmd->conn = isert_conn; |
d703ce2f | 1294 | isert_cmd->iscsi_cmd = cmd; |
b8d26b3b | 1295 | |
d703ce2f | 1296 | return cmd; |
b8d26b3b NB |
1297 | } |
1298 | ||
1299 | static int | |
1300 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1301 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1302 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1303 | { |
b8d26b3b NB |
1304 | struct iscsi_conn *conn = isert_conn->conn; |
1305 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1306 | struct scatterlist *sg; | |
1307 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; | |
1308 | bool dump_payload = false; | |
1309 | ||
1310 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1311 | if (rc < 0) | |
1312 | return rc; | |
1313 | ||
1314 | imm_data = cmd->immediate_data; | |
1315 | imm_data_len = cmd->first_burst_len; | |
1316 | unsol_data = cmd->unsolicited_data; | |
1317 | ||
1318 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1319 | if (rc < 0) { | |
1320 | return 0; | |
1321 | } else if (rc > 0) { | |
1322 | dump_payload = true; | |
1323 | goto sequence_cmd; | |
1324 | } | |
1325 | ||
1326 | if (!imm_data) | |
1327 | return 0; | |
1328 | ||
1329 | sg = &cmd->se_cmd.t_data_sg[0]; | |
1330 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1331 | ||
24f412dd | 1332 | isert_dbg("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n", |
4c22e07f | 1333 | sg, sg_nents, &rx_desc->data[0], imm_data_len); |
b8d26b3b NB |
1334 | |
1335 | sg_copy_from_buffer(sg, sg_nents, &rx_desc->data[0], imm_data_len); | |
1336 | ||
1337 | cmd->write_data_done += imm_data_len; | |
1338 | ||
1339 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1340 | spin_lock_bh(&cmd->istate_lock); | |
1341 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1342 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1343 | spin_unlock_bh(&cmd->istate_lock); | |
1344 | } | |
1345 | ||
1346 | sequence_cmd: | |
561bf158 | 1347 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b NB |
1348 | |
1349 | if (!rc && dump_payload == false && unsol_data) | |
1350 | iscsit_set_unsoliticed_dataout(cmd); | |
6cc44a6f | 1351 | else if (dump_payload && imm_data) |
afc16604 | 1352 | target_put_sess_cmd(&cmd->se_cmd); |
b8d26b3b | 1353 | |
b8d26b3b NB |
1354 | return 0; |
1355 | } | |
1356 | ||
1357 | static int | |
1358 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1359 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1360 | { | |
1361 | struct scatterlist *sg_start; | |
1362 | struct iscsi_conn *conn = isert_conn->conn; | |
1363 | struct iscsi_cmd *cmd = NULL; | |
1364 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1365 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1366 | int rc, sg_nents, sg_off, page_off; | |
1367 | ||
1368 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1369 | if (rc < 0) | |
1370 | return rc; | |
1371 | else if (!cmd) | |
1372 | return 0; | |
1373 | /* | |
1374 | * FIXME: Unexpected unsolicited_data out | |
1375 | */ | |
1376 | if (!cmd->unsolicited_data) { | |
24f412dd | 1377 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1378 | dump_stack(); |
1379 | return -1; | |
1380 | } | |
1381 | ||
4c22e07f SG |
1382 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1383 | "write_data_done: %u, data_length: %u\n", | |
1384 | unsol_data_len, cmd->write_data_done, | |
1385 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1386 | |
1387 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1388 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1389 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1390 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1391 | /* | |
1392 | * FIXME: Non page-aligned unsolicited_data out | |
1393 | */ | |
1394 | if (page_off) { | |
4c22e07f | 1395 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1396 | dump_stack(); |
1397 | return -1; | |
1398 | } | |
4c22e07f SG |
1399 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1400 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
1401 | sg_nents, &rx_desc->data[0], unsol_data_len); | |
b8d26b3b NB |
1402 | |
1403 | sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], | |
1404 | unsol_data_len); | |
1405 | ||
1406 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1407 | if (rc < 0) | |
1408 | return rc; | |
1409 | ||
1410 | return 0; | |
1411 | } | |
1412 | ||
778de368 NB |
1413 | static int |
1414 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1415 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1416 | unsigned char *buf) | |
778de368 | 1417 | { |
778de368 NB |
1418 | struct iscsi_conn *conn = isert_conn->conn; |
1419 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1420 | int rc; | |
1421 | ||
1422 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1423 | if (rc < 0) | |
1424 | return rc; | |
1425 | /* | |
1426 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1427 | */ | |
1428 | ||
1429 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1430 | } | |
1431 | ||
adb54c29 NB |
1432 | static int |
1433 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1434 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1435 | struct iscsi_text *hdr) | |
adb54c29 | 1436 | { |
adb54c29 NB |
1437 | struct iscsi_conn *conn = isert_conn->conn; |
1438 | u32 payload_length = ntoh24(hdr->dlength); | |
1439 | int rc; | |
b44a2b67 | 1440 | unsigned char *text_in = NULL; |
adb54c29 NB |
1441 | |
1442 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1443 | if (rc < 0) | |
1444 | return rc; | |
1445 | ||
b44a2b67 SG |
1446 | if (payload_length) { |
1447 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
1448 | if (!text_in) { | |
1449 | isert_err("Unable to allocate text_in of payload_length: %u\n", | |
1450 | payload_length); | |
1451 | return -ENOMEM; | |
1452 | } | |
adb54c29 NB |
1453 | } |
1454 | cmd->text_in_ptr = text_in; | |
1455 | ||
1456 | memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); | |
1457 | ||
1458 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1459 | } | |
1460 | ||
b8d26b3b NB |
1461 | static int |
1462 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1463 | uint32_t read_stag, uint64_t read_va, | |
1464 | uint32_t write_stag, uint64_t write_va) | |
1465 | { | |
1466 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
1467 | struct iscsi_conn *conn = isert_conn->conn; | |
1468 | struct iscsi_cmd *cmd; | |
1469 | struct isert_cmd *isert_cmd; | |
1470 | int ret = -EINVAL; | |
1471 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1472 | ||
fb140271 | 1473 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1474 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1475 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1476 | " ignoring\n", opcode); |
ca40d24e NB |
1477 | return 0; |
1478 | } | |
1479 | ||
b8d26b3b NB |
1480 | switch (opcode) { |
1481 | case ISCSI_OP_SCSI_CMD: | |
676687c6 | 1482 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1483 | if (!cmd) |
1484 | break; | |
1485 | ||
d703ce2f | 1486 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1487 | isert_cmd->read_stag = read_stag; |
1488 | isert_cmd->read_va = read_va; | |
1489 | isert_cmd->write_stag = write_stag; | |
1490 | isert_cmd->write_va = write_va; | |
1491 | ||
d703ce2f | 1492 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1493 | rx_desc, (unsigned char *)hdr); |
1494 | break; | |
1495 | case ISCSI_OP_NOOP_OUT: | |
676687c6 | 1496 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1497 | if (!cmd) |
1498 | break; | |
1499 | ||
d703ce2f NB |
1500 | isert_cmd = iscsit_priv_cmd(cmd); |
1501 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1502 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1503 | break; |
1504 | case ISCSI_OP_SCSI_DATA_OUT: | |
1505 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1506 | (unsigned char *)hdr); | |
1507 | break; | |
1508 | case ISCSI_OP_SCSI_TMFUNC: | |
676687c6 | 1509 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1510 | if (!cmd) |
1511 | break; | |
1512 | ||
1513 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1514 | (unsigned char *)hdr); | |
1515 | break; | |
1516 | case ISCSI_OP_LOGOUT: | |
676687c6 | 1517 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1518 | if (!cmd) |
1519 | break; | |
1520 | ||
1521 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1522 | break; |
adb54c29 | 1523 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1524 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) { |
1525 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); | |
1526 | if (!cmd) | |
1527 | break; | |
1528 | } else { | |
1529 | cmd = isert_allocate_cmd(conn); | |
1530 | if (!cmd) | |
1531 | break; | |
1532 | } | |
adb54c29 | 1533 | |
d703ce2f NB |
1534 | isert_cmd = iscsit_priv_cmd(cmd); |
1535 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1536 | rx_desc, (struct iscsi_text *)hdr); |
1537 | break; | |
b8d26b3b | 1538 | default: |
24f412dd | 1539 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1540 | dump_stack(); |
1541 | break; | |
1542 | } | |
1543 | ||
1544 | return ret; | |
1545 | } | |
1546 | ||
1547 | static void | |
1548 | isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) | |
1549 | { | |
1550 | struct iser_hdr *iser_hdr = &rx_desc->iser_header; | |
1551 | uint64_t read_va = 0, write_va = 0; | |
1552 | uint32_t read_stag = 0, write_stag = 0; | |
1553 | int rc; | |
1554 | ||
1555 | switch (iser_hdr->flags & 0xF0) { | |
1556 | case ISCSI_CTRL: | |
1557 | if (iser_hdr->flags & ISER_RSV) { | |
1558 | read_stag = be32_to_cpu(iser_hdr->read_stag); | |
1559 | read_va = be64_to_cpu(iser_hdr->read_va); | |
4c22e07f SG |
1560 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1561 | read_stag, (unsigned long long)read_va); | |
b8d26b3b NB |
1562 | } |
1563 | if (iser_hdr->flags & ISER_WSV) { | |
1564 | write_stag = be32_to_cpu(iser_hdr->write_stag); | |
1565 | write_va = be64_to_cpu(iser_hdr->write_va); | |
4c22e07f SG |
1566 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1567 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1568 | } |
1569 | ||
24f412dd | 1570 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1571 | break; |
1572 | case ISER_HELLO: | |
24f412dd | 1573 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1574 | break; |
1575 | default: | |
24f412dd | 1576 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags); |
b8d26b3b NB |
1577 | break; |
1578 | } | |
1579 | ||
1580 | rc = isert_rx_opcode(isert_conn, rx_desc, | |
1581 | read_stag, read_va, write_stag, write_va); | |
1582 | } | |
1583 | ||
1584 | static void | |
7748681b SG |
1585 | isert_rcv_completion(struct iser_rx_desc *desc, |
1586 | struct isert_conn *isert_conn, | |
1587 | u32 xfer_len) | |
b8d26b3b | 1588 | { |
dac6ab30 | 1589 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1590 | struct iscsi_hdr *hdr; |
1591 | u64 rx_dma; | |
1592 | int rx_buflen, outstanding; | |
1593 | ||
1594 | if ((char *)desc == isert_conn->login_req_buf) { | |
1595 | rx_dma = isert_conn->login_req_dma; | |
1596 | rx_buflen = ISER_RX_LOGIN_SIZE; | |
4c22e07f | 1597 | isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1598 | rx_dma, rx_buflen); |
1599 | } else { | |
1600 | rx_dma = desc->dma_addr; | |
1601 | rx_buflen = ISER_RX_PAYLOAD_SIZE; | |
4c22e07f | 1602 | isert_dbg("req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1603 | rx_dma, rx_buflen); |
1604 | } | |
1605 | ||
1606 | ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); | |
1607 | ||
1608 | hdr = &desc->iscsi_header; | |
24f412dd | 1609 | isert_dbg("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", |
b8d26b3b NB |
1610 | hdr->opcode, hdr->itt, hdr->flags, |
1611 | (int)(xfer_len - ISER_HEADERS_LEN)); | |
1612 | ||
2371e5da SG |
1613 | if ((char *)desc == isert_conn->login_req_buf) { |
1614 | isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN; | |
1615 | if (isert_conn->conn) { | |
1616 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
1617 | ||
1618 | if (login && !login->first_request) | |
1619 | isert_rx_login_req(isert_conn); | |
1620 | } | |
dac6ab30 | 1621 | mutex_lock(&isert_conn->mutex); |
2371e5da | 1622 | complete(&isert_conn->login_req_comp); |
dac6ab30 | 1623 | mutex_unlock(&isert_conn->mutex); |
2371e5da | 1624 | } else { |
b8d26b3b | 1625 | isert_rx_do_work(desc, isert_conn); |
2371e5da | 1626 | } |
b8d26b3b NB |
1627 | |
1628 | ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, | |
1629 | DMA_FROM_DEVICE); | |
1630 | ||
1631 | isert_conn->post_recv_buf_count--; | |
4c22e07f SG |
1632 | isert_dbg("Decremented post_recv_buf_count: %d\n", |
1633 | isert_conn->post_recv_buf_count); | |
b8d26b3b NB |
1634 | |
1635 | if ((char *)desc == isert_conn->login_req_buf) | |
1636 | return; | |
1637 | ||
1638 | outstanding = isert_conn->post_recv_buf_count; | |
1639 | if (outstanding + ISERT_MIN_POSTED_RX <= ISERT_QP_MAX_RECV_DTOS) { | |
1640 | int err, count = min(ISERT_QP_MAX_RECV_DTOS - outstanding, | |
1641 | ISERT_MIN_POSTED_RX); | |
1642 | err = isert_post_recv(isert_conn, count); | |
1643 | if (err) { | |
24f412dd | 1644 | isert_err("isert_post_recv() count: %d failed, %d\n", |
b8d26b3b NB |
1645 | count, err); |
1646 | } | |
1647 | } | |
1648 | } | |
1649 | ||
e3d7e4c3 SG |
1650 | static int |
1651 | isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
1652 | struct scatterlist *sg, u32 nents, u32 length, u32 offset, | |
1653 | enum iser_ib_op_code op, struct isert_data_buf *data) | |
1654 | { | |
dac6ab30 | 1655 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1656 | |
1657 | data->dma_dir = op == ISER_IB_RDMA_WRITE ? | |
1658 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
1659 | ||
1660 | data->len = length - offset; | |
1661 | data->offset = offset; | |
1662 | data->sg_off = data->offset / PAGE_SIZE; | |
1663 | ||
1664 | data->sg = &sg[data->sg_off]; | |
1665 | data->nents = min_t(unsigned int, nents - data->sg_off, | |
1666 | ISCSI_ISER_SG_TABLESIZE); | |
1667 | data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * | |
1668 | PAGE_SIZE); | |
1669 | ||
1670 | data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, | |
1671 | data->dma_dir); | |
1672 | if (unlikely(!data->dma_nents)) { | |
24f412dd | 1673 | isert_err("Cmd: unable to dma map SGs %p\n", sg); |
e3d7e4c3 SG |
1674 | return -EINVAL; |
1675 | } | |
1676 | ||
24f412dd | 1677 | isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", |
4c22e07f | 1678 | isert_cmd, data->dma_nents, data->sg, data->nents, data->len); |
e3d7e4c3 SG |
1679 | |
1680 | return 0; | |
1681 | } | |
1682 | ||
1683 | static void | |
1684 | isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) | |
1685 | { | |
dac6ab30 | 1686 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1687 | |
1688 | ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); | |
1689 | memset(data, 0, sizeof(*data)); | |
1690 | } | |
1691 | ||
1692 | ||
1693 | ||
b8d26b3b NB |
1694 | static void |
1695 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) | |
1696 | { | |
1697 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
b8d26b3b | 1698 | |
4c22e07f | 1699 | isert_dbg("Cmd %p\n", isert_cmd); |
e3d7e4c3 SG |
1700 | |
1701 | if (wr->data.sg) { | |
4c22e07f | 1702 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1703 | isert_unmap_data_buf(isert_conn, &wr->data); |
b8d26b3b NB |
1704 | } |
1705 | ||
90ecc6e2 | 1706 | if (wr->send_wr) { |
4c22e07f | 1707 | isert_dbg("Cmd %p free send_wr\n", isert_cmd); |
90ecc6e2 VP |
1708 | kfree(wr->send_wr); |
1709 | wr->send_wr = NULL; | |
1710 | } | |
b8d26b3b | 1711 | |
90ecc6e2 | 1712 | if (wr->ib_sge) { |
4c22e07f | 1713 | isert_dbg("Cmd %p free ib_sge\n", isert_cmd); |
90ecc6e2 VP |
1714 | kfree(wr->ib_sge); |
1715 | wr->ib_sge = NULL; | |
1716 | } | |
b8d26b3b NB |
1717 | } |
1718 | ||
59464ef4 | 1719 | static void |
a3a5a826 | 1720 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) |
59464ef4 VP |
1721 | { |
1722 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
59464ef4 | 1723 | |
4c22e07f | 1724 | isert_dbg("Cmd %p\n", isert_cmd); |
59464ef4 VP |
1725 | |
1726 | if (wr->fr_desc) { | |
4c22e07f | 1727 | isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd, wr->fr_desc); |
9e961ae7 SG |
1728 | if (wr->fr_desc->ind & ISERT_PROTECTED) { |
1729 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
1730 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
1731 | } | |
dac6ab30 SG |
1732 | spin_lock_bh(&isert_conn->pool_lock); |
1733 | list_add_tail(&wr->fr_desc->list, &isert_conn->fr_pool); | |
1734 | spin_unlock_bh(&isert_conn->pool_lock); | |
59464ef4 VP |
1735 | wr->fr_desc = NULL; |
1736 | } | |
1737 | ||
e3d7e4c3 | 1738 | if (wr->data.sg) { |
4c22e07f | 1739 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1740 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 VP |
1741 | } |
1742 | ||
1743 | wr->ib_sge = NULL; | |
1744 | wr->send_wr = NULL; | |
1745 | } | |
1746 | ||
b8d26b3b | 1747 | static void |
03e7848a | 1748 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1749 | { |
d703ce2f | 1750 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1751 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1752 | struct iscsi_conn *conn = isert_conn->conn; |
dac6ab30 | 1753 | struct isert_device *device = isert_conn->device; |
e4f4e801 | 1754 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1755 | |
4c22e07f | 1756 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1757 | |
1758 | switch (cmd->iscsi_opcode) { | |
1759 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1760 | spin_lock_bh(&conn->cmd_lock); |
1761 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1762 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1763 | spin_unlock_bh(&conn->cmd_lock); |
1764 | ||
03e7848a | 1765 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1766 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1767 | /* |
1768 | * Check for special case during comp_err where | |
1769 | * WRITE_PENDING has been handed off from core, | |
1770 | * but requires an extra target_put_sess_cmd() | |
1771 | * before transport_generic_free_cmd() below. | |
1772 | */ | |
1773 | if (comp_err && | |
1774 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1775 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1776 | ||
afc16604 | 1777 | target_put_sess_cmd(se_cmd); |
03e7848a NB |
1778 | } |
1779 | } | |
b8d26b3b | 1780 | |
d40945d8 | 1781 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
186a9647 NB |
1782 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1783 | break; | |
b8d26b3b | 1784 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1785 | spin_lock_bh(&conn->cmd_lock); |
1786 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1787 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1788 | spin_unlock_bh(&conn->cmd_lock); |
1789 | ||
b8d26b3b NB |
1790 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1791 | break; | |
1792 | case ISCSI_OP_REJECT: | |
1793 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1794 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1795 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1796 | /* If the continue bit is on, keep the command alive */ | |
1797 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1798 | break; | |
1799 | ||
b8d26b3b NB |
1800 | spin_lock_bh(&conn->cmd_lock); |
1801 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1802 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1803 | spin_unlock_bh(&conn->cmd_lock); |
1804 | ||
1805 | /* | |
1806 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1807 | * overwritten the original iscsi_opcode assignment, and the | |
1808 | * associated cmd->se_cmd needs to be released. | |
1809 | */ | |
1810 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1811 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1812 | cmd->iscsi_opcode); |
b8d26b3b NB |
1813 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1814 | break; | |
1815 | } | |
1816 | /* | |
1817 | * Fall-through | |
1818 | */ | |
1819 | default: | |
d703ce2f | 1820 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1821 | break; |
1822 | } | |
1823 | } | |
1824 | ||
1825 | static void | |
1826 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1827 | { | |
1828 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1829 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1830 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1831 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1832 | tx_desc->dma_addr = 0; | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | static void | |
1837 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1838 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1839 | { |
dbbc5d11 | 1840 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1841 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1842 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1843 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1844 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1845 | } |
1846 | ||
1847 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1848 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1849 | } |
1850 | ||
96b7973e SG |
1851 | static int |
1852 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1853 | { | |
1854 | struct ib_mr_status mr_status; | |
1855 | int ret; | |
1856 | ||
1857 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1858 | if (ret) { | |
24f412dd | 1859 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1860 | goto fail_mr_status; |
1861 | } | |
1862 | ||
1863 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1864 | u64 sec_offset_err; | |
1865 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1866 | ||
1867 | switch (mr_status.sig_err.err_type) { | |
1868 | case IB_SIG_BAD_GUARD: | |
1869 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1870 | break; | |
1871 | case IB_SIG_BAD_REFTAG: | |
1872 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1873 | break; | |
1874 | case IB_SIG_BAD_APPTAG: | |
1875 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1876 | break; | |
1877 | } | |
1878 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1879 | do_div(sec_offset_err, block_size); | |
1880 | se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; | |
1881 | ||
4c22e07f SG |
1882 | isert_err("PI error found type %d at sector 0x%llx " |
1883 | "expected 0x%x vs actual 0x%x\n", | |
1884 | mr_status.sig_err.err_type, | |
1885 | (unsigned long long)se_cmd->bad_sector, | |
1886 | mr_status.sig_err.expected, | |
1887 | mr_status.sig_err.actual); | |
96b7973e SG |
1888 | ret = 1; |
1889 | } | |
1890 | ||
1891 | fail_mr_status: | |
1892 | return ret; | |
1893 | } | |
1894 | ||
f93f3a70 SG |
1895 | static void |
1896 | isert_completion_rdma_write(struct iser_tx_desc *tx_desc, | |
1897 | struct isert_cmd *isert_cmd) | |
1898 | { | |
9e961ae7 | 1899 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
f93f3a70 | 1900 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
9e961ae7 | 1901 | struct se_cmd *se_cmd = &cmd->se_cmd; |
f93f3a70 | 1902 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1903 | struct isert_device *device = isert_conn->device; |
9e961ae7 SG |
1904 | int ret = 0; |
1905 | ||
1906 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { | |
96b7973e SG |
1907 | ret = isert_check_pi_status(se_cmd, |
1908 | wr->fr_desc->pi_ctx->sig_mr); | |
1909 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 | 1910 | } |
f93f3a70 SG |
1911 | |
1912 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
897bb2c9 | 1913 | wr->send_wr_num = 0; |
9e961ae7 SG |
1914 | if (ret) |
1915 | transport_send_check_condition_and_sense(se_cmd, | |
1916 | se_cmd->pi_err, 0); | |
1917 | else | |
1918 | isert_put_response(isert_conn->conn, cmd); | |
f93f3a70 SG |
1919 | } |
1920 | ||
b8d26b3b NB |
1921 | static void |
1922 | isert_completion_rdma_read(struct iser_tx_desc *tx_desc, | |
1923 | struct isert_cmd *isert_cmd) | |
1924 | { | |
1925 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
d703ce2f | 1926 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1927 | struct se_cmd *se_cmd = &cmd->se_cmd; |
90ecc6e2 | 1928 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1929 | struct isert_device *device = isert_conn->device; |
5bac4b1a | 1930 | int ret = 0; |
b8d26b3b | 1931 | |
9e961ae7 | 1932 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { |
96b7973e SG |
1933 | ret = isert_check_pi_status(se_cmd, |
1934 | wr->fr_desc->pi_ctx->sig_mr); | |
1935 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 SG |
1936 | } |
1937 | ||
b8d26b3b | 1938 | iscsit_stop_dataout_timer(cmd); |
d40945d8 | 1939 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
e3d7e4c3 | 1940 | cmd->write_data_done = wr->data.len; |
b6b87a1d | 1941 | wr->send_wr_num = 0; |
b8d26b3b | 1942 | |
24f412dd | 1943 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1944 | spin_lock_bh(&cmd->istate_lock); |
1945 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1946 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1947 | spin_unlock_bh(&cmd->istate_lock); | |
1948 | ||
364189f0 | 1949 | if (ret) { |
afc16604 | 1950 | target_put_sess_cmd(se_cmd); |
5bac4b1a SG |
1951 | transport_send_check_condition_and_sense(se_cmd, |
1952 | se_cmd->pi_err, 0); | |
364189f0 | 1953 | } else { |
5bac4b1a | 1954 | target_execute_cmd(se_cmd); |
364189f0 | 1955 | } |
b8d26b3b NB |
1956 | } |
1957 | ||
1958 | static void | |
1959 | isert_do_control_comp(struct work_struct *work) | |
1960 | { | |
1961 | struct isert_cmd *isert_cmd = container_of(work, | |
1962 | struct isert_cmd, comp_work); | |
1963 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1964 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
d703ce2f | 1965 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1966 | |
4c22e07f SG |
1967 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1968 | ||
b8d26b3b NB |
1969 | switch (cmd->i_state) { |
1970 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1971 | iscsit_tmr_post_handler(cmd, cmd->conn); |
10633c37 SG |
1972 | case ISTATE_SEND_REJECT: /* FALLTHRU */ |
1973 | case ISTATE_SEND_TEXTRSP: /* FALLTHRU */ | |
b8d26b3b | 1974 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1975 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1976 | ib_dev, false); | |
3df8f68a | 1977 | break; |
b8d26b3b | 1978 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1979 | iscsit_logout_post_handler(cmd, cmd->conn); |
1980 | break; | |
1981 | default: | |
4c22e07f | 1982 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1983 | dump_stack(); |
1984 | break; | |
1985 | } | |
1986 | } | |
1987 | ||
1988 | static void | |
1989 | isert_response_completion(struct iser_tx_desc *tx_desc, | |
1990 | struct isert_cmd *isert_cmd, | |
1991 | struct isert_conn *isert_conn, | |
1992 | struct ib_device *ib_dev) | |
1993 | { | |
d703ce2f | 1994 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b NB |
1995 | |
1996 | if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || | |
3df8f68a | 1997 | cmd->i_state == ISTATE_SEND_LOGOUTRSP || |
adb54c29 NB |
1998 | cmd->i_state == ISTATE_SEND_REJECT || |
1999 | cmd->i_state == ISTATE_SEND_TEXTRSP) { | |
b8d26b3b NB |
2000 | isert_unmap_tx_desc(tx_desc, ib_dev); |
2001 | ||
2002 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
2003 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
2004 | return; | |
2005 | } | |
897bb2c9 | 2006 | |
b8d26b3b | 2007 | cmd->i_state = ISTATE_SENT_STATUS; |
03e7848a | 2008 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); |
b8d26b3b NB |
2009 | } |
2010 | ||
2011 | static void | |
7748681b | 2012 | isert_snd_completion(struct iser_tx_desc *tx_desc, |
68a86dee | 2013 | struct isert_conn *isert_conn) |
b8d26b3b | 2014 | { |
dac6ab30 | 2015 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
2016 | struct isert_cmd *isert_cmd = tx_desc->isert_cmd; |
2017 | struct isert_rdma_wr *wr; | |
2018 | ||
2019 | if (!isert_cmd) { | |
b8d26b3b NB |
2020 | isert_unmap_tx_desc(tx_desc, ib_dev); |
2021 | return; | |
2022 | } | |
2023 | wr = &isert_cmd->rdma_wr; | |
2024 | ||
4c22e07f SG |
2025 | isert_dbg("Cmd %p iser_ib_op %d\n", isert_cmd, wr->iser_ib_op); |
2026 | ||
b8d26b3b | 2027 | switch (wr->iser_ib_op) { |
b8d26b3b | 2028 | case ISER_IB_SEND: |
b8d26b3b NB |
2029 | isert_response_completion(tx_desc, isert_cmd, |
2030 | isert_conn, ib_dev); | |
2031 | break; | |
2032 | case ISER_IB_RDMA_WRITE: | |
f93f3a70 | 2033 | isert_completion_rdma_write(tx_desc, isert_cmd); |
b8d26b3b NB |
2034 | break; |
2035 | case ISER_IB_RDMA_READ: | |
b8d26b3b NB |
2036 | isert_completion_rdma_read(tx_desc, isert_cmd); |
2037 | break; | |
2038 | default: | |
4c22e07f | 2039 | isert_err("Unknown wr->iser_ib_op: 0x%x\n", wr->iser_ib_op); |
b8d26b3b NB |
2040 | dump_stack(); |
2041 | break; | |
2042 | } | |
2043 | } | |
2044 | ||
6f0fae3d SG |
2045 | /** |
2046 | * is_isert_tx_desc() - Indicate if the completion wr_id | |
2047 | * is a TX descriptor or not. | |
2048 | * @isert_conn: iser connection | |
2049 | * @wr_id: completion WR identifier | |
2050 | * | |
2051 | * Since we cannot rely on wc opcode in FLUSH errors | |
2052 | * we must work around it by checking if the wr_id address | |
2053 | * falls in the iser connection rx_descs buffer. If so | |
2054 | * it is an RX descriptor, otherwize it is a TX. | |
2055 | */ | |
2056 | static inline bool | |
2057 | is_isert_tx_desc(struct isert_conn *isert_conn, void *wr_id) | |
2058 | { | |
dac6ab30 SG |
2059 | void *start = isert_conn->rx_descs; |
2060 | int len = ISERT_QP_MAX_RECV_DTOS * sizeof(*isert_conn->rx_descs); | |
6f0fae3d SG |
2061 | |
2062 | if (wr_id >= start && wr_id < start + len) | |
2063 | return false; | |
2064 | ||
2065 | return true; | |
2066 | } | |
2067 | ||
b8d26b3b | 2068 | static void |
6f0fae3d | 2069 | isert_cq_comp_err(struct isert_conn *isert_conn, struct ib_wc *wc) |
b8d26b3b | 2070 | { |
bdf20e72 | 2071 | if (wc->wr_id == ISER_BEACON_WRID) { |
dac6ab30 | 2072 | isert_info("conn %p completing wait_comp_err\n", |
bdf20e72 | 2073 | isert_conn); |
dac6ab30 | 2074 | complete(&isert_conn->wait_comp_err); |
ed4520ae | 2075 | } else if (is_isert_tx_desc(isert_conn, (void *)(uintptr_t)wc->wr_id)) { |
dac6ab30 | 2076 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
df43debd | 2077 | struct isert_cmd *isert_cmd; |
6f0fae3d | 2078 | struct iser_tx_desc *desc; |
df43debd | 2079 | |
6f0fae3d SG |
2080 | desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
2081 | isert_cmd = desc->isert_cmd; | |
df43debd SG |
2082 | if (!isert_cmd) |
2083 | isert_unmap_tx_desc(desc, ib_dev); | |
2084 | else | |
2085 | isert_completion_put(desc, isert_cmd, ib_dev, true); | |
df43debd SG |
2086 | } else { |
2087 | isert_conn->post_recv_buf_count--; | |
bdf20e72 SG |
2088 | if (!isert_conn->post_recv_buf_count) |
2089 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
df43debd | 2090 | } |
b8d26b3b NB |
2091 | } |
2092 | ||
2093 | static void | |
6f0fae3d | 2094 | isert_handle_wc(struct ib_wc *wc) |
b8d26b3b | 2095 | { |
b8d26b3b NB |
2096 | struct isert_conn *isert_conn; |
2097 | struct iser_tx_desc *tx_desc; | |
6f0fae3d | 2098 | struct iser_rx_desc *rx_desc; |
b8d26b3b | 2099 | |
6f0fae3d SG |
2100 | isert_conn = wc->qp->qp_context; |
2101 | if (likely(wc->status == IB_WC_SUCCESS)) { | |
2102 | if (wc->opcode == IB_WC_RECV) { | |
2103 | rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id; | |
7748681b | 2104 | isert_rcv_completion(rx_desc, isert_conn, wc->byte_len); |
b8d26b3b | 2105 | } else { |
6f0fae3d | 2106 | tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
7748681b | 2107 | isert_snd_completion(tx_desc, isert_conn); |
b8d26b3b | 2108 | } |
6f0fae3d SG |
2109 | } else { |
2110 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
ea8a1616 SG |
2111 | isert_err("%s (%d): wr id %llx vend_err %x\n", |
2112 | ib_wc_status_msg(wc->status), wc->status, | |
2113 | wc->wr_id, wc->vendor_err); | |
6f0fae3d | 2114 | else |
ea8a1616 SG |
2115 | isert_dbg("%s (%d): wr id %llx\n", |
2116 | ib_wc_status_msg(wc->status), wc->status, | |
2117 | wc->wr_id); | |
b8d26b3b | 2118 | |
6f0fae3d SG |
2119 | if (wc->wr_id != ISER_FASTREG_LI_WRID) |
2120 | isert_cq_comp_err(isert_conn, wc); | |
2121 | } | |
b8d26b3b NB |
2122 | } |
2123 | ||
2124 | static void | |
6f0fae3d | 2125 | isert_cq_work(struct work_struct *work) |
b8d26b3b | 2126 | { |
37d9fe80 | 2127 | enum { isert_poll_budget = 65536 }; |
4a295bae | 2128 | struct isert_comp *comp = container_of(work, struct isert_comp, |
6f0fae3d | 2129 | work); |
36ea63b5 SG |
2130 | struct ib_wc *const wcs = comp->wcs; |
2131 | int i, n, completed = 0; | |
b8d26b3b | 2132 | |
36ea63b5 SG |
2133 | while ((n = ib_poll_cq(comp->cq, ARRAY_SIZE(comp->wcs), wcs)) > 0) { |
2134 | for (i = 0; i < n; i++) | |
2135 | isert_handle_wc(&wcs[i]); | |
b8d26b3b | 2136 | |
36ea63b5 SG |
2137 | completed += n; |
2138 | if (completed >= isert_poll_budget) | |
37d9fe80 SG |
2139 | break; |
2140 | } | |
2141 | ||
6f0fae3d | 2142 | ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
b8d26b3b NB |
2143 | } |
2144 | ||
2145 | static void | |
6f0fae3d | 2146 | isert_cq_callback(struct ib_cq *cq, void *context) |
b8d26b3b | 2147 | { |
4a295bae | 2148 | struct isert_comp *comp = context; |
b8d26b3b | 2149 | |
6f0fae3d | 2150 | queue_work(isert_comp_wq, &comp->work); |
b8d26b3b NB |
2151 | } |
2152 | ||
2153 | static int | |
2154 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
2155 | { | |
2156 | struct ib_send_wr *wr_failed; | |
2157 | int ret; | |
2158 | ||
dac6ab30 | 2159 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, |
b8d26b3b NB |
2160 | &wr_failed); |
2161 | if (ret) { | |
24f412dd | 2162 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
2163 | return ret; |
2164 | } | |
2165 | return ret; | |
2166 | } | |
2167 | ||
2168 | static int | |
2169 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2170 | { | |
d703ce2f | 2171 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2172 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2173 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2174 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
2175 | &isert_cmd->tx_desc.iscsi_header; | |
2176 | ||
2177 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2178 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
2179 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2180 | /* | |
2181 | * Attach SENSE DATA payload to iSCSI Response PDU | |
2182 | */ | |
2183 | if (cmd->se_cmd.sense_buffer && | |
2184 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
2185 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 2186 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2187 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 2188 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 2189 | u32 padding, pdu_len; |
b8d26b3b NB |
2190 | |
2191 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
2192 | cmd->sense_buffer); | |
2193 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
2194 | ||
2195 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
2196 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 2197 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 2198 | |
dbbc5d11 NB |
2199 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
2200 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b NB |
2201 | DMA_TO_DEVICE); |
2202 | ||
dbbc5d11 NB |
2203 | isert_cmd->pdu_buf_len = pdu_len; |
2204 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2205 | tx_dsg->length = pdu_len; | |
34efc7df | 2206 | tx_dsg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
2207 | isert_cmd->tx_desc.num_sge = 2; |
2208 | } | |
2209 | ||
68a86dee | 2210 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2211 | |
4c22e07f | 2212 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
2213 | |
2214 | return isert_post_response(isert_conn, isert_cmd); | |
2215 | } | |
2216 | ||
131e6abc NB |
2217 | static void |
2218 | isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2219 | { | |
2220 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 2221 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2222 | struct isert_device *device = isert_conn->device; |
131e6abc NB |
2223 | |
2224 | spin_lock_bh(&conn->cmd_lock); | |
2225 | if (!list_empty(&cmd->i_conn_node)) | |
2226 | list_del_init(&cmd->i_conn_node); | |
2227 | spin_unlock_bh(&conn->cmd_lock); | |
2228 | ||
2229 | if (cmd->data_direction == DMA_TO_DEVICE) | |
2230 | iscsit_stop_dataout_timer(cmd); | |
2231 | ||
2232 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
2233 | } | |
2234 | ||
e70beee7 NB |
2235 | static enum target_prot_op |
2236 | isert_get_sup_prot_ops(struct iscsi_conn *conn) | |
2237 | { | |
6700425e | 2238 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2239 | struct isert_device *device = isert_conn->device; |
e70beee7 | 2240 | |
23a548ee SG |
2241 | if (conn->tpg->tpg_attrib.t10_pi) { |
2242 | if (device->pi_capable) { | |
24f412dd | 2243 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
2244 | isert_conn->pi_support = true; |
2245 | return TARGET_PROT_ALL; | |
2246 | } | |
2247 | } | |
2248 | ||
24f412dd | 2249 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 2250 | isert_conn->pi_support = false; |
e70beee7 NB |
2251 | |
2252 | return TARGET_PROT_NORMAL; | |
2253 | } | |
2254 | ||
b8d26b3b NB |
2255 | static int |
2256 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2257 | bool nopout_response) | |
2258 | { | |
d703ce2f | 2259 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2260 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2261 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2262 | ||
2263 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2264 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
2265 | &isert_cmd->tx_desc.iscsi_header, | |
2266 | nopout_response); | |
2267 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2268 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2269 | |
4c22e07f | 2270 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
2271 | |
2272 | return isert_post_response(isert_conn, isert_cmd); | |
2273 | } | |
2274 | ||
2275 | static int | |
2276 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2277 | { | |
d703ce2f | 2278 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2279 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2280 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2281 | ||
2282 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2283 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
2284 | &isert_cmd->tx_desc.iscsi_header); | |
2285 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2286 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2287 | |
4c22e07f | 2288 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
2289 | |
2290 | return isert_post_response(isert_conn, isert_cmd); | |
2291 | } | |
2292 | ||
2293 | static int | |
2294 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2295 | { | |
d703ce2f | 2296 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2297 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2298 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2299 | ||
2300 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2301 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
2302 | &isert_cmd->tx_desc.iscsi_header); | |
2303 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2304 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2305 | |
4c22e07f | 2306 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
2307 | |
2308 | return isert_post_response(isert_conn, isert_cmd); | |
2309 | } | |
2310 | ||
2311 | static int | |
2312 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2313 | { | |
d703ce2f | 2314 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2315 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 2316 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 2317 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2318 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
2319 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2320 | struct iscsi_reject *hdr = | |
2321 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
2322 | |
2323 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 2324 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 2325 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
2326 | |
2327 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 2328 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
2329 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
2330 | DMA_TO_DEVICE); | |
dbbc5d11 NB |
2331 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
2332 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 2333 | tx_dsg->length = ISCSI_HDR_LEN; |
34efc7df | 2334 | tx_dsg->lkey = device->pd->local_dma_lkey; |
3df8f68a NB |
2335 | isert_cmd->tx_desc.num_sge = 2; |
2336 | ||
68a86dee | 2337 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2338 | |
4c22e07f | 2339 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
2340 | |
2341 | return isert_post_response(isert_conn, isert_cmd); | |
2342 | } | |
2343 | ||
adb54c29 NB |
2344 | static int |
2345 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2346 | { | |
d703ce2f | 2347 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2348 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
2349 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2350 | struct iscsi_text_rsp *hdr = | |
2351 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
2352 | u32 txt_rsp_len; | |
2353 | int rc; | |
2354 | ||
2355 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 2356 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
2357 | if (rc < 0) |
2358 | return rc; | |
2359 | ||
2360 | txt_rsp_len = rc; | |
2361 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2362 | ||
2363 | if (txt_rsp_len) { | |
dac6ab30 | 2364 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2365 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
2366 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2367 | void *txt_rsp_buf = cmd->buf_ptr; | |
2368 | ||
2369 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
2370 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
2371 | ||
2372 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
2373 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2374 | tx_dsg->length = txt_rsp_len; | |
34efc7df | 2375 | tx_dsg->lkey = device->pd->local_dma_lkey; |
adb54c29 NB |
2376 | isert_cmd->tx_desc.num_sge = 2; |
2377 | } | |
68a86dee | 2378 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 2379 | |
f64d2792 | 2380 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
2381 | |
2382 | return isert_post_response(isert_conn, isert_cmd); | |
2383 | } | |
2384 | ||
b8d26b3b NB |
2385 | static int |
2386 | isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
2387 | struct ib_sge *ib_sge, struct ib_send_wr *send_wr, | |
2388 | u32 data_left, u32 offset) | |
2389 | { | |
d703ce2f | 2390 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 2391 | struct scatterlist *sg_start, *tmp_sg; |
dac6ab30 | 2392 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2393 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
2394 | u32 sg_off, page_off; |
2395 | int i = 0, sg_nents; | |
2396 | ||
2397 | sg_off = offset / PAGE_SIZE; | |
2398 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
2399 | sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); | |
2400 | page_off = offset % PAGE_SIZE; | |
2401 | ||
2402 | send_wr->sg_list = ib_sge; | |
b0a191e7 | 2403 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
b8d26b3b NB |
2404 | /* |
2405 | * Perform mapping of TCM scatterlist memory ib_sge dma_addr. | |
2406 | */ | |
2407 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
4c22e07f SG |
2408 | isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, " |
2409 | "page_off: %u\n", | |
2410 | (unsigned long long)tmp_sg->dma_address, | |
2411 | tmp_sg->length, page_off); | |
b8d26b3b NB |
2412 | |
2413 | ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; | |
2414 | ib_sge->length = min_t(u32, data_left, | |
2415 | ib_sg_dma_len(ib_dev, tmp_sg) - page_off); | |
34efc7df | 2416 | ib_sge->lkey = device->pd->local_dma_lkey; |
b8d26b3b | 2417 | |
4c22e07f SG |
2418 | isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n", |
2419 | ib_sge->addr, ib_sge->length, ib_sge->lkey); | |
b8d26b3b NB |
2420 | page_off = 0; |
2421 | data_left -= ib_sge->length; | |
9253e667 SG |
2422 | if (!data_left) |
2423 | break; | |
b8d26b3b | 2424 | ib_sge++; |
24f412dd | 2425 | isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge); |
b8d26b3b NB |
2426 | } |
2427 | ||
9253e667 | 2428 | send_wr->num_sge = ++i; |
24f412dd | 2429 | isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", |
4c22e07f | 2430 | send_wr->sg_list, send_wr->num_sge); |
b8d26b3b | 2431 | |
9253e667 | 2432 | return send_wr->num_sge; |
b8d26b3b NB |
2433 | } |
2434 | ||
2435 | static int | |
90ecc6e2 VP |
2436 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2437 | struct isert_rdma_wr *wr) | |
b8d26b3b NB |
2438 | { |
2439 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2440 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2441 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2442 | struct isert_data_buf *data = &wr->data; |
90ecc6e2 | 2443 | struct ib_send_wr *send_wr; |
b8d26b3b | 2444 | struct ib_sge *ib_sge; |
e3d7e4c3 SG |
2445 | u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; |
2446 | int ret = 0, i, ib_sge_cnt; | |
90ecc6e2 | 2447 | |
e3d7e4c3 | 2448 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
b8d26b3b | 2449 | |
e3d7e4c3 SG |
2450 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2451 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2452 | se_cmd->t_data_nents, se_cmd->data_length, | |
2453 | offset, wr->iser_ib_op, &wr->data); | |
2454 | if (ret) | |
2455 | return ret; | |
b8d26b3b | 2456 | |
e3d7e4c3 SG |
2457 | data_left = data->len; |
2458 | offset = data->offset; | |
b8d26b3b | 2459 | |
e3d7e4c3 | 2460 | ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); |
b8d26b3b | 2461 | if (!ib_sge) { |
24f412dd | 2462 | isert_warn("Unable to allocate ib_sge\n"); |
b8d26b3b | 2463 | ret = -ENOMEM; |
e3d7e4c3 | 2464 | goto unmap_cmd; |
b8d26b3b | 2465 | } |
90ecc6e2 | 2466 | wr->ib_sge = ib_sge; |
b8d26b3b | 2467 | |
e3d7e4c3 | 2468 | wr->send_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); |
b8d26b3b NB |
2469 | wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num, |
2470 | GFP_KERNEL); | |
2471 | if (!wr->send_wr) { | |
24f412dd | 2472 | isert_dbg("Unable to allocate wr->send_wr\n"); |
b8d26b3b | 2473 | ret = -ENOMEM; |
e3d7e4c3 | 2474 | goto unmap_cmd; |
b8d26b3b | 2475 | } |
b8d26b3b NB |
2476 | |
2477 | wr->isert_cmd = isert_cmd; | |
2478 | rdma_write_max = isert_conn->max_sge * PAGE_SIZE; | |
b8d26b3b NB |
2479 | |
2480 | for (i = 0; i < wr->send_wr_num; i++) { | |
2481 | send_wr = &isert_cmd->rdma_wr.send_wr[i]; | |
2482 | data_len = min(data_left, rdma_write_max); | |
2483 | ||
b8d26b3b | 2484 | send_wr->send_flags = 0; |
90ecc6e2 VP |
2485 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
2486 | send_wr->opcode = IB_WR_RDMA_WRITE; | |
2487 | send_wr->wr.rdma.remote_addr = isert_cmd->read_va + offset; | |
2488 | send_wr->wr.rdma.rkey = isert_cmd->read_stag; | |
2489 | if (i + 1 == wr->send_wr_num) | |
2490 | send_wr->next = &isert_cmd->tx_desc.send_wr; | |
2491 | else | |
2492 | send_wr->next = &wr->send_wr[i + 1]; | |
2493 | } else { | |
2494 | send_wr->opcode = IB_WR_RDMA_READ; | |
2495 | send_wr->wr.rdma.remote_addr = isert_cmd->write_va + va_offset; | |
2496 | send_wr->wr.rdma.rkey = isert_cmd->write_stag; | |
2497 | if (i + 1 == wr->send_wr_num) | |
2498 | send_wr->send_flags = IB_SEND_SIGNALED; | |
2499 | else | |
2500 | send_wr->next = &wr->send_wr[i + 1]; | |
2501 | } | |
b8d26b3b NB |
2502 | |
2503 | ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, | |
2504 | send_wr, data_len, offset); | |
2505 | ib_sge += ib_sge_cnt; | |
2506 | ||
b8d26b3b | 2507 | offset += data_len; |
90ecc6e2 | 2508 | va_offset += data_len; |
b8d26b3b NB |
2509 | data_left -= data_len; |
2510 | } | |
90ecc6e2 VP |
2511 | |
2512 | return 0; | |
e3d7e4c3 SG |
2513 | unmap_cmd: |
2514 | isert_unmap_data_buf(isert_conn, data); | |
2515 | ||
90ecc6e2 VP |
2516 | return ret; |
2517 | } | |
2518 | ||
59464ef4 VP |
2519 | static int |
2520 | isert_map_fr_pagelist(struct ib_device *ib_dev, | |
2521 | struct scatterlist *sg_start, int sg_nents, u64 *fr_pl) | |
2522 | { | |
2523 | u64 start_addr, end_addr, page, chunk_start = 0; | |
2524 | struct scatterlist *tmp_sg; | |
2525 | int i = 0, new_chunk, last_ent, n_pages; | |
2526 | ||
2527 | n_pages = 0; | |
2528 | new_chunk = 1; | |
2529 | last_ent = sg_nents - 1; | |
2530 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
2531 | start_addr = ib_sg_dma_address(ib_dev, tmp_sg); | |
2532 | if (new_chunk) | |
2533 | chunk_start = start_addr; | |
2534 | end_addr = start_addr + ib_sg_dma_len(ib_dev, tmp_sg); | |
2535 | ||
4c22e07f SG |
2536 | isert_dbg("SGL[%d] dma_addr: 0x%llx len: %u\n", |
2537 | i, (unsigned long long)tmp_sg->dma_address, | |
2538 | tmp_sg->length); | |
59464ef4 VP |
2539 | |
2540 | if ((end_addr & ~PAGE_MASK) && i < last_ent) { | |
2541 | new_chunk = 0; | |
2542 | continue; | |
2543 | } | |
2544 | new_chunk = 1; | |
2545 | ||
2546 | page = chunk_start & PAGE_MASK; | |
2547 | do { | |
2548 | fr_pl[n_pages++] = page; | |
4c22e07f SG |
2549 | isert_dbg("Mapped page_list[%d] page_addr: 0x%llx\n", |
2550 | n_pages - 1, page); | |
59464ef4 VP |
2551 | page += PAGE_SIZE; |
2552 | } while (page < end_addr); | |
2553 | } | |
2554 | ||
2555 | return n_pages; | |
2556 | } | |
2557 | ||
10633c37 SG |
2558 | static inline void |
2559 | isert_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr) | |
2560 | { | |
2561 | u32 rkey; | |
2562 | ||
2563 | memset(inv_wr, 0, sizeof(*inv_wr)); | |
2564 | inv_wr->wr_id = ISER_FASTREG_LI_WRID; | |
2565 | inv_wr->opcode = IB_WR_LOCAL_INV; | |
2566 | inv_wr->ex.invalidate_rkey = mr->rkey; | |
2567 | ||
2568 | /* Bump the key */ | |
2569 | rkey = ib_inc_rkey(mr->rkey); | |
2570 | ib_update_fast_reg_key(mr, rkey); | |
2571 | } | |
2572 | ||
59464ef4 | 2573 | static int |
e3d7e4c3 SG |
2574 | isert_fast_reg_mr(struct isert_conn *isert_conn, |
2575 | struct fast_reg_descriptor *fr_desc, | |
2576 | struct isert_data_buf *mem, | |
9e961ae7 | 2577 | enum isert_indicator ind, |
e3d7e4c3 | 2578 | struct ib_sge *sge) |
59464ef4 | 2579 | { |
dac6ab30 | 2580 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2581 | struct ib_device *ib_dev = device->ib_device; |
9e961ae7 SG |
2582 | struct ib_mr *mr; |
2583 | struct ib_fast_reg_page_list *frpl; | |
59464ef4 VP |
2584 | struct ib_send_wr fr_wr, inv_wr; |
2585 | struct ib_send_wr *bad_wr, *wr = NULL; | |
9bd626e7 SG |
2586 | int ret, pagelist_len; |
2587 | u32 page_off; | |
59464ef4 | 2588 | |
e3d7e4c3 | 2589 | if (mem->dma_nents == 1) { |
34efc7df | 2590 | sge->lkey = device->pd->local_dma_lkey; |
e3d7e4c3 SG |
2591 | sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); |
2592 | sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); | |
4c22e07f SG |
2593 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2594 | sge->addr, sge->length, sge->lkey); | |
e3d7e4c3 SG |
2595 | return 0; |
2596 | } | |
2597 | ||
9e961ae7 SG |
2598 | if (ind == ISERT_DATA_KEY_VALID) { |
2599 | /* Registering data buffer */ | |
2600 | mr = fr_desc->data_mr; | |
2601 | frpl = fr_desc->data_frpl; | |
2602 | } else { | |
2603 | /* Registering protection buffer */ | |
2604 | mr = fr_desc->pi_ctx->prot_mr; | |
2605 | frpl = fr_desc->pi_ctx->prot_frpl; | |
2606 | } | |
2607 | ||
e3d7e4c3 | 2608 | page_off = mem->offset % PAGE_SIZE; |
59464ef4 | 2609 | |
24f412dd | 2610 | isert_dbg("Use fr_desc %p sg_nents %d offset %u\n", |
4c22e07f | 2611 | fr_desc, mem->nents, mem->offset); |
59464ef4 | 2612 | |
e3d7e4c3 | 2613 | pagelist_len = isert_map_fr_pagelist(ib_dev, mem->sg, mem->nents, |
9e961ae7 | 2614 | &frpl->page_list[0]); |
59464ef4 | 2615 | |
10633c37 SG |
2616 | if (!(fr_desc->ind & ind)) { |
2617 | isert_inv_rkey(&inv_wr, mr); | |
59464ef4 | 2618 | wr = &inv_wr; |
59464ef4 VP |
2619 | } |
2620 | ||
2621 | /* Prepare FASTREG WR */ | |
2622 | memset(&fr_wr, 0, sizeof(fr_wr)); | |
9bb4ca68 | 2623 | fr_wr.wr_id = ISER_FASTREG_LI_WRID; |
59464ef4 | 2624 | fr_wr.opcode = IB_WR_FAST_REG_MR; |
9e961ae7 SG |
2625 | fr_wr.wr.fast_reg.iova_start = frpl->page_list[0] + page_off; |
2626 | fr_wr.wr.fast_reg.page_list = frpl; | |
59464ef4 VP |
2627 | fr_wr.wr.fast_reg.page_list_len = pagelist_len; |
2628 | fr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; | |
e3d7e4c3 | 2629 | fr_wr.wr.fast_reg.length = mem->len; |
9e961ae7 | 2630 | fr_wr.wr.fast_reg.rkey = mr->rkey; |
59464ef4 VP |
2631 | fr_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE; |
2632 | ||
2633 | if (!wr) | |
2634 | wr = &fr_wr; | |
2635 | else | |
2636 | wr->next = &fr_wr; | |
2637 | ||
dac6ab30 | 2638 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
59464ef4 | 2639 | if (ret) { |
24f412dd | 2640 | isert_err("fast registration failed, ret:%d\n", ret); |
59464ef4 VP |
2641 | return ret; |
2642 | } | |
9e961ae7 | 2643 | fr_desc->ind &= ~ind; |
59464ef4 | 2644 | |
9e961ae7 SG |
2645 | sge->lkey = mr->lkey; |
2646 | sge->addr = frpl->page_list[0] + page_off; | |
e3d7e4c3 | 2647 | sge->length = mem->len; |
59464ef4 | 2648 | |
4c22e07f SG |
2649 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2650 | sge->addr, sge->length, sge->lkey); | |
9e961ae7 SG |
2651 | |
2652 | return ret; | |
2653 | } | |
2654 | ||
3d73cf1a SG |
2655 | static inline void |
2656 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, | |
2657 | struct ib_sig_domain *domain) | |
2658 | { | |
78eda2bb | 2659 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
2660 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
2661 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
2662 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
2663 | /* |
2664 | * At the moment we hard code those, but if in the future | |
2665 | * the target core would like to use it, we will take it | |
2666 | * from se_cmd. | |
2667 | */ | |
2668 | domain->sig.dif.apptag_check_mask = 0xffff; | |
2669 | domain->sig.dif.app_escape = true; | |
2670 | domain->sig.dif.ref_escape = true; | |
2671 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
2672 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
2673 | domain->sig.dif.ref_remap = true; | |
3d73cf1a SG |
2674 | }; |
2675 | ||
9e961ae7 SG |
2676 | static int |
2677 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2678 | { | |
9e961ae7 SG |
2679 | switch (se_cmd->prot_op) { |
2680 | case TARGET_PROT_DIN_INSERT: | |
2681 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2682 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2683 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
9e961ae7 SG |
2684 | break; |
2685 | case TARGET_PROT_DOUT_INSERT: | |
2686 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2687 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2688 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); |
9e961ae7 SG |
2689 | break; |
2690 | case TARGET_PROT_DIN_PASS: | |
2691 | case TARGET_PROT_DOUT_PASS: | |
3d73cf1a SG |
2692 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
2693 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); | |
9e961ae7 SG |
2694 | break; |
2695 | default: | |
24f412dd | 2696 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2697 | return -EINVAL; |
2698 | } | |
2699 | ||
2700 | return 0; | |
2701 | } | |
2702 | ||
2703 | static inline u8 | |
2704 | isert_set_prot_checks(u8 prot_checks) | |
2705 | { | |
2706 | return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | | |
2707 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | | |
2708 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); | |
2709 | } | |
2710 | ||
2711 | static int | |
570db170 SG |
2712 | isert_reg_sig_mr(struct isert_conn *isert_conn, |
2713 | struct se_cmd *se_cmd, | |
2714 | struct isert_rdma_wr *rdma_wr, | |
2715 | struct fast_reg_descriptor *fr_desc) | |
9e961ae7 SG |
2716 | { |
2717 | struct ib_send_wr sig_wr, inv_wr; | |
2718 | struct ib_send_wr *bad_wr, *wr = NULL; | |
2719 | struct pi_context *pi_ctx = fr_desc->pi_ctx; | |
2720 | struct ib_sig_attrs sig_attrs; | |
2721 | int ret; | |
9e961ae7 SG |
2722 | |
2723 | memset(&sig_attrs, 0, sizeof(sig_attrs)); | |
2724 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); | |
2725 | if (ret) | |
2726 | goto err; | |
59464ef4 | 2727 | |
9e961ae7 SG |
2728 | sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); |
2729 | ||
2730 | if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { | |
10633c37 | 2731 | isert_inv_rkey(&inv_wr, pi_ctx->sig_mr); |
9e961ae7 | 2732 | wr = &inv_wr; |
9e961ae7 SG |
2733 | } |
2734 | ||
2735 | memset(&sig_wr, 0, sizeof(sig_wr)); | |
2736 | sig_wr.opcode = IB_WR_REG_SIG_MR; | |
c2caa207 | 2737 | sig_wr.wr_id = ISER_FASTREG_LI_WRID; |
570db170 | 2738 | sig_wr.sg_list = &rdma_wr->ib_sg[DATA]; |
9e961ae7 SG |
2739 | sig_wr.num_sge = 1; |
2740 | sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE; | |
2741 | sig_wr.wr.sig_handover.sig_attrs = &sig_attrs; | |
2742 | sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr; | |
2743 | if (se_cmd->t_prot_sg) | |
570db170 | 2744 | sig_wr.wr.sig_handover.prot = &rdma_wr->ib_sg[PROT]; |
9e961ae7 SG |
2745 | |
2746 | if (!wr) | |
2747 | wr = &sig_wr; | |
2748 | else | |
2749 | wr->next = &sig_wr; | |
2750 | ||
dac6ab30 | 2751 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
9e961ae7 | 2752 | if (ret) { |
24f412dd | 2753 | isert_err("fast registration failed, ret:%d\n", ret); |
9e961ae7 SG |
2754 | goto err; |
2755 | } | |
2756 | fr_desc->ind &= ~ISERT_SIG_KEY_VALID; | |
2757 | ||
570db170 SG |
2758 | rdma_wr->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey; |
2759 | rdma_wr->ib_sg[SIG].addr = 0; | |
2760 | rdma_wr->ib_sg[SIG].length = se_cmd->data_length; | |
9e961ae7 SG |
2761 | if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && |
2762 | se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) | |
2763 | /* | |
2764 | * We have protection guards on the wire | |
2765 | * so we need to set a larget transfer | |
2766 | */ | |
570db170 | 2767 | rdma_wr->ib_sg[SIG].length += se_cmd->prot_length; |
9e961ae7 | 2768 | |
24f412dd | 2769 | isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n", |
570db170 SG |
2770 | rdma_wr->ib_sg[SIG].addr, rdma_wr->ib_sg[SIG].length, |
2771 | rdma_wr->ib_sg[SIG].lkey); | |
9e961ae7 | 2772 | err: |
59464ef4 VP |
2773 | return ret; |
2774 | } | |
2775 | ||
570db170 SG |
2776 | static int |
2777 | isert_handle_prot_cmd(struct isert_conn *isert_conn, | |
2778 | struct isert_cmd *isert_cmd, | |
2779 | struct isert_rdma_wr *wr) | |
2780 | { | |
dac6ab30 | 2781 | struct isert_device *device = isert_conn->device; |
570db170 SG |
2782 | struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd; |
2783 | int ret; | |
2784 | ||
2785 | if (!wr->fr_desc->pi_ctx) { | |
2786 | ret = isert_create_pi_ctx(wr->fr_desc, | |
2787 | device->ib_device, | |
67cb3949 | 2788 | device->pd); |
570db170 | 2789 | if (ret) { |
24f412dd | 2790 | isert_err("conn %p failed to allocate pi_ctx\n", |
570db170 SG |
2791 | isert_conn); |
2792 | return ret; | |
2793 | } | |
2794 | } | |
2795 | ||
2796 | if (se_cmd->t_prot_sg) { | |
2797 | ret = isert_map_data_buf(isert_conn, isert_cmd, | |
2798 | se_cmd->t_prot_sg, | |
2799 | se_cmd->t_prot_nents, | |
2800 | se_cmd->prot_length, | |
2801 | 0, wr->iser_ib_op, &wr->prot); | |
2802 | if (ret) { | |
24f412dd | 2803 | isert_err("conn %p failed to map protection buffer\n", |
570db170 SG |
2804 | isert_conn); |
2805 | return ret; | |
2806 | } | |
2807 | ||
2808 | memset(&wr->ib_sg[PROT], 0, sizeof(wr->ib_sg[PROT])); | |
2809 | ret = isert_fast_reg_mr(isert_conn, wr->fr_desc, &wr->prot, | |
2810 | ISERT_PROT_KEY_VALID, &wr->ib_sg[PROT]); | |
2811 | if (ret) { | |
24f412dd | 2812 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2813 | isert_conn); |
2814 | goto unmap_prot_cmd; | |
2815 | } | |
2816 | } | |
2817 | ||
2818 | ret = isert_reg_sig_mr(isert_conn, se_cmd, wr, wr->fr_desc); | |
2819 | if (ret) { | |
24f412dd | 2820 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2821 | isert_conn); |
2822 | goto unmap_prot_cmd; | |
2823 | } | |
2824 | wr->fr_desc->ind |= ISERT_PROTECTED; | |
2825 | ||
2826 | return 0; | |
2827 | ||
2828 | unmap_prot_cmd: | |
2829 | if (se_cmd->t_prot_sg) | |
2830 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
2831 | ||
2832 | return ret; | |
2833 | } | |
2834 | ||
59464ef4 | 2835 | static int |
a3a5a826 SG |
2836 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2837 | struct isert_rdma_wr *wr) | |
59464ef4 VP |
2838 | { |
2839 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
2840 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
e3d7e4c3 | 2841 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2842 | struct fast_reg_descriptor *fr_desc = NULL; |
570db170 SG |
2843 | struct ib_send_wr *send_wr; |
2844 | struct ib_sge *ib_sg; | |
e3d7e4c3 SG |
2845 | u32 offset; |
2846 | int ret = 0; | |
59464ef4 VP |
2847 | unsigned long flags; |
2848 | ||
e3d7e4c3 | 2849 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
59464ef4 | 2850 | |
e3d7e4c3 SG |
2851 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2852 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2853 | se_cmd->t_data_nents, se_cmd->data_length, | |
2854 | offset, wr->iser_ib_op, &wr->data); | |
2855 | if (ret) | |
2856 | return ret; | |
59464ef4 | 2857 | |
302cc7c3 | 2858 | if (wr->data.dma_nents != 1 || isert_prot_cmd(isert_conn, se_cmd)) { |
dac6ab30 SG |
2859 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2860 | fr_desc = list_first_entry(&isert_conn->fr_pool, | |
e3d7e4c3 SG |
2861 | struct fast_reg_descriptor, list); |
2862 | list_del(&fr_desc->list); | |
dac6ab30 | 2863 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); |
e3d7e4c3 | 2864 | wr->fr_desc = fr_desc; |
59464ef4 | 2865 | } |
59464ef4 | 2866 | |
9e961ae7 | 2867 | ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, |
570db170 | 2868 | ISERT_DATA_KEY_VALID, &wr->ib_sg[DATA]); |
e3d7e4c3 SG |
2869 | if (ret) |
2870 | goto unmap_cmd; | |
59464ef4 | 2871 | |
302cc7c3 | 2872 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
570db170 | 2873 | ret = isert_handle_prot_cmd(isert_conn, isert_cmd, wr); |
9e961ae7 | 2874 | if (ret) |
570db170 | 2875 | goto unmap_cmd; |
9e961ae7 | 2876 | |
570db170 SG |
2877 | ib_sg = &wr->ib_sg[SIG]; |
2878 | } else { | |
2879 | ib_sg = &wr->ib_sg[DATA]; | |
2880 | } | |
9e961ae7 | 2881 | |
570db170 | 2882 | memcpy(&wr->s_ib_sge, ib_sg, sizeof(*ib_sg)); |
e3d7e4c3 | 2883 | wr->ib_sge = &wr->s_ib_sge; |
59464ef4 VP |
2884 | wr->send_wr_num = 1; |
2885 | memset(&wr->s_send_wr, 0, sizeof(*send_wr)); | |
2886 | wr->send_wr = &wr->s_send_wr; | |
59464ef4 | 2887 | wr->isert_cmd = isert_cmd; |
59464ef4 VP |
2888 | |
2889 | send_wr = &isert_cmd->rdma_wr.s_send_wr; | |
e3d7e4c3 | 2890 | send_wr->sg_list = &wr->s_ib_sge; |
59464ef4 | 2891 | send_wr->num_sge = 1; |
b0a191e7 | 2892 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
59464ef4 VP |
2893 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
2894 | send_wr->opcode = IB_WR_RDMA_WRITE; | |
2895 | send_wr->wr.rdma.remote_addr = isert_cmd->read_va; | |
2896 | send_wr->wr.rdma.rkey = isert_cmd->read_stag; | |
302cc7c3 | 2897 | send_wr->send_flags = !isert_prot_cmd(isert_conn, se_cmd) ? |
9e961ae7 | 2898 | 0 : IB_SEND_SIGNALED; |
59464ef4 VP |
2899 | } else { |
2900 | send_wr->opcode = IB_WR_RDMA_READ; | |
2901 | send_wr->wr.rdma.remote_addr = isert_cmd->write_va; | |
2902 | send_wr->wr.rdma.rkey = isert_cmd->write_stag; | |
2903 | send_wr->send_flags = IB_SEND_SIGNALED; | |
2904 | } | |
2905 | ||
e3d7e4c3 | 2906 | return 0; |
570db170 | 2907 | |
e3d7e4c3 SG |
2908 | unmap_cmd: |
2909 | if (fr_desc) { | |
dac6ab30 SG |
2910 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2911 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); | |
2912 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); | |
59464ef4 | 2913 | } |
e3d7e4c3 | 2914 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 | 2915 | |
59464ef4 VP |
2916 | return ret; |
2917 | } | |
2918 | ||
90ecc6e2 VP |
2919 | static int |
2920 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2921 | { | |
2922 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2923 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
90ecc6e2 | 2924 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2925 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2926 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2927 | struct ib_send_wr *wr_failed; |
2928 | int rc; | |
2929 | ||
24f412dd | 2930 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2931 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2932 | |
90ecc6e2 | 2933 | wr->iser_ib_op = ISER_IB_RDMA_WRITE; |
d40945d8 | 2934 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2935 | if (rc) { |
24f412dd | 2936 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 VP |
2937 | return rc; |
2938 | } | |
2939 | ||
302cc7c3 | 2940 | if (!isert_prot_cmd(isert_conn, se_cmd)) { |
9e961ae7 SG |
2941 | /* |
2942 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2943 | */ | |
2944 | isert_create_send_desc(isert_conn, isert_cmd, | |
2945 | &isert_cmd->tx_desc); | |
2946 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2947 | &isert_cmd->tx_desc.iscsi_header); | |
2948 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2949 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2950 | &isert_cmd->tx_desc.send_wr); |
9e961ae7 | 2951 | isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr; |
897bb2c9 | 2952 | wr->send_wr_num += 1; |
9e961ae7 | 2953 | } |
b8d26b3b | 2954 | |
dac6ab30 | 2955 | rc = ib_post_send(isert_conn->qp, wr->send_wr, &wr_failed); |
bdf20e72 | 2956 | if (rc) |
24f412dd | 2957 | isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); |
9e961ae7 | 2958 | |
302cc7c3 | 2959 | if (!isert_prot_cmd(isert_conn, se_cmd)) |
24f412dd | 2960 | isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data " |
9e961ae7 SG |
2961 | "READ\n", isert_cmd); |
2962 | else | |
24f412dd | 2963 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", |
9e961ae7 | 2964 | isert_cmd); |
b8d26b3b | 2965 | |
90ecc6e2 | 2966 | return 1; |
b8d26b3b NB |
2967 | } |
2968 | ||
2969 | static int | |
2970 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2971 | { | |
2972 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2973 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 2974 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2975 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2976 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2977 | struct ib_send_wr *wr_failed; |
2978 | int rc; | |
b8d26b3b | 2979 | |
24f412dd | 2980 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
90ecc6e2 | 2981 | isert_cmd, se_cmd->data_length, cmd->write_data_done); |
b8d26b3b | 2982 | wr->iser_ib_op = ISER_IB_RDMA_READ; |
d40945d8 | 2983 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2984 | if (rc) { |
24f412dd | 2985 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 | 2986 | return rc; |
b8d26b3b NB |
2987 | } |
2988 | ||
dac6ab30 | 2989 | rc = ib_post_send(isert_conn->qp, wr->send_wr, &wr_failed); |
bdf20e72 | 2990 | if (rc) |
24f412dd | 2991 | isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); |
bdf20e72 | 2992 | |
24f412dd | 2993 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", |
90ecc6e2 | 2994 | isert_cmd); |
b8d26b3b | 2995 | |
90ecc6e2 | 2996 | return 0; |
b8d26b3b NB |
2997 | } |
2998 | ||
2999 | static int | |
3000 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
3001 | { | |
3002 | int ret; | |
3003 | ||
3004 | switch (state) { | |
3005 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3006 | ret = isert_put_nopin(cmd, conn, false); | |
3007 | break; | |
3008 | default: | |
24f412dd | 3009 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
3010 | ret = -EINVAL; |
3011 | break; | |
3012 | } | |
3013 | ||
3014 | return ret; | |
3015 | } | |
3016 | ||
3017 | static int | |
3018 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
3019 | { | |
991bb764 | 3020 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
3021 | int ret; |
3022 | ||
3023 | switch (state) { | |
3024 | case ISTATE_SEND_LOGOUTRSP: | |
3025 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
3026 | if (!ret) |
3027 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
3028 | break; |
3029 | case ISTATE_SEND_NOPIN: | |
3030 | ret = isert_put_nopin(cmd, conn, true); | |
3031 | break; | |
3032 | case ISTATE_SEND_TASKMGTRSP: | |
3033 | ret = isert_put_tm_rsp(cmd, conn); | |
3034 | break; | |
3035 | case ISTATE_SEND_REJECT: | |
3036 | ret = isert_put_reject(cmd, conn); | |
3037 | break; | |
adb54c29 NB |
3038 | case ISTATE_SEND_TEXTRSP: |
3039 | ret = isert_put_text_rsp(cmd, conn); | |
3040 | break; | |
b8d26b3b NB |
3041 | case ISTATE_SEND_STATUS: |
3042 | /* | |
3043 | * Special case for sending non GOOD SCSI status from TX thread | |
3044 | * context during pre se_cmd excecution failure. | |
3045 | */ | |
3046 | ret = isert_put_response(conn, cmd); | |
3047 | break; | |
3048 | default: | |
24f412dd | 3049 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
3050 | ret = -EINVAL; |
3051 | break; | |
3052 | } | |
3053 | ||
3054 | return ret; | |
3055 | } | |
3056 | ||
ca6c1d82 SG |
3057 | struct rdma_cm_id * |
3058 | isert_setup_id(struct isert_np *isert_np) | |
3059 | { | |
3060 | struct iscsi_np *np = isert_np->np; | |
3061 | struct rdma_cm_id *id; | |
3062 | struct sockaddr *sa; | |
3063 | int ret; | |
3064 | ||
3065 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 3066 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 SG |
3067 | |
3068 | id = rdma_create_id(isert_cma_handler, isert_np, | |
3069 | RDMA_PS_TCP, IB_QPT_RC); | |
3070 | if (IS_ERR(id)) { | |
24f412dd | 3071 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
3072 | ret = PTR_ERR(id); |
3073 | goto out; | |
3074 | } | |
24f412dd | 3075 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 SG |
3076 | |
3077 | ret = rdma_bind_addr(id, sa); | |
3078 | if (ret) { | |
24f412dd | 3079 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
3080 | goto out_id; |
3081 | } | |
3082 | ||
992607e8 | 3083 | ret = rdma_listen(id, 0); |
ca6c1d82 | 3084 | if (ret) { |
24f412dd | 3085 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
3086 | goto out_id; |
3087 | } | |
3088 | ||
3089 | return id; | |
3090 | out_id: | |
3091 | rdma_destroy_id(id); | |
3092 | out: | |
3093 | return ERR_PTR(ret); | |
3094 | } | |
3095 | ||
b8d26b3b NB |
3096 | static int |
3097 | isert_setup_np(struct iscsi_np *np, | |
13a3cf08 | 3098 | struct sockaddr_storage *ksockaddr) |
b8d26b3b NB |
3099 | { |
3100 | struct isert_np *isert_np; | |
3101 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
3102 | int ret; |
3103 | ||
3104 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
3105 | if (!isert_np) { | |
24f412dd | 3106 | isert_err("Unable to allocate struct isert_np\n"); |
b8d26b3b NB |
3107 | return -ENOMEM; |
3108 | } | |
531b7bf4 | 3109 | sema_init(&isert_np->np_sem, 0); |
b8d26b3b NB |
3110 | mutex_init(&isert_np->np_accept_mutex); |
3111 | INIT_LIST_HEAD(&isert_np->np_accept_list); | |
3112 | init_completion(&isert_np->np_login_comp); | |
ca6c1d82 | 3113 | isert_np->np = np; |
b8d26b3b | 3114 | |
b8d26b3b NB |
3115 | /* |
3116 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
3117 | * in iscsi_target_configfs.c code.. | |
3118 | */ | |
3119 | memcpy(&np->np_sockaddr, ksockaddr, | |
13a3cf08 | 3120 | sizeof(struct sockaddr_storage)); |
b8d26b3b | 3121 | |
ca6c1d82 | 3122 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 3123 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
3124 | ret = PTR_ERR(isert_lid); |
3125 | goto out; | |
3126 | } | |
3127 | ||
b8d26b3b NB |
3128 | isert_np->np_cm_id = isert_lid; |
3129 | np->np_context = isert_np; | |
b8d26b3b NB |
3130 | |
3131 | return 0; | |
3132 | ||
b8d26b3b NB |
3133 | out: |
3134 | kfree(isert_np); | |
ca6c1d82 | 3135 | |
b8d26b3b NB |
3136 | return ret; |
3137 | } | |
3138 | ||
b8d26b3b NB |
3139 | static int |
3140 | isert_rdma_accept(struct isert_conn *isert_conn) | |
3141 | { | |
dac6ab30 | 3142 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
3143 | struct rdma_conn_param cp; |
3144 | int ret; | |
3145 | ||
3146 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
3147 | cp.initiator_depth = isert_conn->initiator_depth; |
3148 | cp.retry_count = 7; | |
3149 | cp.rnr_retry_count = 7; | |
3150 | ||
b8d26b3b NB |
3151 | ret = rdma_accept(cm_id, &cp); |
3152 | if (ret) { | |
24f412dd | 3153 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
3154 | return ret; |
3155 | } | |
3156 | ||
b8d26b3b NB |
3157 | return 0; |
3158 | } | |
3159 | ||
3160 | static int | |
3161 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
3162 | { | |
6700425e | 3163 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
3164 | int ret; |
3165 | ||
24f412dd | 3166 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
3167 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
3168 | if (ret) { | |
24f412dd | 3169 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
3170 | isert_conn); |
3171 | return ret; | |
3172 | } | |
3173 | reinit_completion(&isert_conn->login_req_comp); | |
3174 | ||
6faaa85f NB |
3175 | /* |
3176 | * For login requests after the first PDU, isert_rx_login_req() will | |
3177 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
3178 | * received, which turns this callback from iscsi_target_do_login_rx() | |
3179 | * into a NOP. | |
3180 | */ | |
3181 | if (!login->first_request) | |
3182 | return 0; | |
b8d26b3b | 3183 | |
2371e5da SG |
3184 | isert_rx_login_req(isert_conn); |
3185 | ||
dac6ab30 SG |
3186 | isert_info("before login_comp conn: %p\n", conn); |
3187 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
3188 | if (ret) |
3189 | return ret; | |
3190 | ||
24f412dd | 3191 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 3192 | |
b8d26b3b NB |
3193 | return 0; |
3194 | } | |
3195 | ||
3196 | static void | |
3197 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
3198 | struct isert_conn *isert_conn) | |
3199 | { | |
dac6ab30 | 3200 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b | 3201 | struct rdma_route *cm_route = &cm_id->route; |
b8d26b3b NB |
3202 | |
3203 | conn->login_family = np->np_sockaddr.ss_family; | |
3204 | ||
dc58f760 AG |
3205 | conn->login_sockaddr = cm_route->addr.dst_addr; |
3206 | conn->local_sockaddr = cm_route->addr.src_addr; | |
b8d26b3b NB |
3207 | } |
3208 | ||
3209 | static int | |
3210 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
3211 | { | |
6700425e | 3212 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 3213 | struct isert_conn *isert_conn; |
c6b8e918 | 3214 | int ret; |
b8d26b3b NB |
3215 | |
3216 | accept_wait: | |
531b7bf4 | 3217 | ret = down_interruptible(&isert_np->np_sem); |
c6b8e918 | 3218 | if (ret) |
b8d26b3b NB |
3219 | return -ENODEV; |
3220 | ||
3221 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 3222 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 3223 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 3224 | isert_dbg("np_thread_state %d\n", |
e346ab34 SG |
3225 | np->np_thread_state); |
3226 | /** | |
3227 | * No point in stalling here when np_thread | |
3228 | * is in state RESET/SHUTDOWN/EXIT - bail | |
3229 | **/ | |
b8d26b3b NB |
3230 | return -ENODEV; |
3231 | } | |
3232 | spin_unlock_bh(&np->np_thread_lock); | |
3233 | ||
3234 | mutex_lock(&isert_np->np_accept_mutex); | |
3235 | if (list_empty(&isert_np->np_accept_list)) { | |
3236 | mutex_unlock(&isert_np->np_accept_mutex); | |
b8d26b3b NB |
3237 | goto accept_wait; |
3238 | } | |
3239 | isert_conn = list_first_entry(&isert_np->np_accept_list, | |
dac6ab30 SG |
3240 | struct isert_conn, accept_node); |
3241 | list_del_init(&isert_conn->accept_node); | |
b8d26b3b NB |
3242 | mutex_unlock(&isert_np->np_accept_mutex); |
3243 | ||
3244 | conn->context = isert_conn; | |
3245 | isert_conn->conn = conn; | |
b8d26b3b | 3246 | |
b8d26b3b NB |
3247 | isert_set_conn_info(np, conn, isert_conn); |
3248 | ||
24f412dd | 3249 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 3250 | |
b8d26b3b NB |
3251 | return 0; |
3252 | } | |
3253 | ||
3254 | static void | |
3255 | isert_free_np(struct iscsi_np *np) | |
3256 | { | |
6700425e | 3257 | struct isert_np *isert_np = np->np_context; |
268e6811 | 3258 | struct isert_conn *isert_conn, *n; |
b8d26b3b | 3259 | |
3b726ae2 SG |
3260 | if (isert_np->np_cm_id) |
3261 | rdma_destroy_id(isert_np->np_cm_id); | |
b8d26b3b | 3262 | |
268e6811 SG |
3263 | /* |
3264 | * FIXME: At this point we don't have a good way to insure | |
3265 | * that at this point we don't have hanging connections that | |
3266 | * completed RDMA establishment but didn't start iscsi login | |
3267 | * process. So work-around this by cleaning up what ever piled | |
3268 | * up in np_accept_list. | |
3269 | */ | |
3270 | mutex_lock(&isert_np->np_accept_mutex); | |
3271 | if (!list_empty(&isert_np->np_accept_list)) { | |
24f412dd | 3272 | isert_info("Still have isert connections, cleaning up...\n"); |
268e6811 SG |
3273 | list_for_each_entry_safe(isert_conn, n, |
3274 | &isert_np->np_accept_list, | |
dac6ab30 | 3275 | accept_node) { |
24f412dd | 3276 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 SG |
3277 | isert_conn, isert_conn->state); |
3278 | isert_connect_release(isert_conn); | |
3279 | } | |
3280 | } | |
3281 | mutex_unlock(&isert_np->np_accept_mutex); | |
3282 | ||
b8d26b3b NB |
3283 | np->np_context = NULL; |
3284 | kfree(isert_np); | |
3285 | } | |
3286 | ||
b02efbfc SG |
3287 | static void isert_release_work(struct work_struct *work) |
3288 | { | |
3289 | struct isert_conn *isert_conn = container_of(work, | |
3290 | struct isert_conn, | |
3291 | release_work); | |
3292 | ||
24f412dd | 3293 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 3294 | |
dac6ab30 | 3295 | wait_for_completion(&isert_conn->wait); |
b02efbfc | 3296 | |
dac6ab30 | 3297 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 3298 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 3299 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 3300 | |
24f412dd | 3301 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
3302 | isert_put_conn(isert_conn); |
3303 | } | |
3304 | ||
991bb764 SG |
3305 | static void |
3306 | isert_wait4logout(struct isert_conn *isert_conn) | |
3307 | { | |
3308 | struct iscsi_conn *conn = isert_conn->conn; | |
3309 | ||
4c22e07f SG |
3310 | isert_info("conn %p\n", isert_conn); |
3311 | ||
991bb764 | 3312 | if (isert_conn->logout_posted) { |
24f412dd | 3313 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
3314 | wait_for_completion_timeout(&conn->conn_logout_comp, |
3315 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3316 | } | |
3317 | } | |
3318 | ||
c7e160ee SG |
3319 | static void |
3320 | isert_wait4cmds(struct iscsi_conn *conn) | |
3321 | { | |
4c22e07f SG |
3322 | isert_info("iscsi_conn %p\n", conn); |
3323 | ||
c7e160ee SG |
3324 | if (conn->sess) { |
3325 | target_sess_cmd_list_set_waiting(conn->sess->se_sess); | |
3326 | target_wait_for_sess_cmds(conn->sess->se_sess); | |
3327 | } | |
3328 | } | |
3329 | ||
bdf20e72 SG |
3330 | static void |
3331 | isert_wait4flush(struct isert_conn *isert_conn) | |
3332 | { | |
3333 | struct ib_recv_wr *bad_wr; | |
3334 | ||
4c22e07f SG |
3335 | isert_info("conn %p\n", isert_conn); |
3336 | ||
dac6ab30 | 3337 | init_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3338 | isert_conn->beacon.wr_id = ISER_BEACON_WRID; |
3339 | /* post an indication that all flush errors were consumed */ | |
dac6ab30 | 3340 | if (ib_post_recv(isert_conn->qp, &isert_conn->beacon, &bad_wr)) { |
24f412dd | 3341 | isert_err("conn %p failed to post beacon", isert_conn); |
bdf20e72 SG |
3342 | return; |
3343 | } | |
3344 | ||
dac6ab30 | 3345 | wait_for_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3346 | } |
3347 | ||
defd8848 | 3348 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
3349 | { |
3350 | struct isert_conn *isert_conn = conn->context; | |
3351 | ||
4c22e07f | 3352 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 3353 | |
dac6ab30 | 3354 | mutex_lock(&isert_conn->mutex); |
b8d26b3b | 3355 | /* |
dac6ab30 | 3356 | * Only wait for wait_comp_err if the isert_conn made it |
b8d26b3b NB |
3357 | * into full feature phase.. |
3358 | */ | |
b2cb9649 | 3359 | if (isert_conn->state == ISER_CONN_INIT) { |
dac6ab30 | 3360 | mutex_unlock(&isert_conn->mutex); |
b2cb9649 | 3361 | return; |
b8d26b3b | 3362 | } |
954f2372 | 3363 | isert_conn_terminate(isert_conn); |
dac6ab30 | 3364 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 3365 | |
c7e160ee | 3366 | isert_wait4cmds(conn); |
bdf20e72 | 3367 | isert_wait4flush(isert_conn); |
991bb764 | 3368 | isert_wait4logout(isert_conn); |
954f2372 | 3369 | |
b02efbfc | 3370 | queue_work(isert_release_wq, &isert_conn->release_work); |
defd8848 NB |
3371 | } |
3372 | ||
3373 | static void isert_free_conn(struct iscsi_conn *conn) | |
3374 | { | |
3375 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b | 3376 | |
524630d5 | 3377 | isert_wait4flush(isert_conn); |
b8d26b3b NB |
3378 | isert_put_conn(isert_conn); |
3379 | } | |
3380 | ||
3381 | static struct iscsit_transport iser_target_transport = { | |
3382 | .name = "IB/iSER", | |
3383 | .transport_type = ISCSI_INFINIBAND, | |
d703ce2f | 3384 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
3385 | .owner = THIS_MODULE, |
3386 | .iscsit_setup_np = isert_setup_np, | |
3387 | .iscsit_accept_np = isert_accept_np, | |
3388 | .iscsit_free_np = isert_free_np, | |
defd8848 | 3389 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 3390 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
3391 | .iscsit_get_login_rx = isert_get_login_rx, |
3392 | .iscsit_put_login_tx = isert_put_login_tx, | |
3393 | .iscsit_immediate_queue = isert_immediate_queue, | |
3394 | .iscsit_response_queue = isert_response_queue, | |
3395 | .iscsit_get_dataout = isert_get_dataout, | |
3396 | .iscsit_queue_data_in = isert_put_datain, | |
3397 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 3398 | .iscsit_aborted_task = isert_aborted_task, |
e70beee7 | 3399 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
3400 | }; |
3401 | ||
3402 | static int __init isert_init(void) | |
3403 | { | |
3404 | int ret; | |
3405 | ||
631af550 SG |
3406 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
3407 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 3408 | if (!isert_comp_wq) { |
24f412dd | 3409 | isert_err("Unable to allocate isert_comp_wq\n"); |
b8d26b3b | 3410 | ret = -ENOMEM; |
6f0fae3d | 3411 | return -ENOMEM; |
b8d26b3b NB |
3412 | } |
3413 | ||
b02efbfc SG |
3414 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
3415 | WQ_UNBOUND_MAX_ACTIVE); | |
3416 | if (!isert_release_wq) { | |
24f412dd | 3417 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
3418 | ret = -ENOMEM; |
3419 | goto destroy_comp_wq; | |
3420 | } | |
3421 | ||
b8d26b3b | 3422 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 3423 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 3424 | |
b8d26b3b NB |
3425 | return 0; |
3426 | ||
b02efbfc SG |
3427 | destroy_comp_wq: |
3428 | destroy_workqueue(isert_comp_wq); | |
6f0fae3d | 3429 | |
b8d26b3b NB |
3430 | return ret; |
3431 | } | |
3432 | ||
3433 | static void __exit isert_exit(void) | |
3434 | { | |
f5ebec96 | 3435 | flush_scheduled_work(); |
b02efbfc | 3436 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 3437 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 3438 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 3439 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
b8d26b3b NB |
3440 | } |
3441 | ||
3442 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
9e35eff4 | 3443 | MODULE_VERSION("1.0"); |
b8d26b3b NB |
3444 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
3445 | MODULE_LICENSE("GPL"); | |
3446 | ||
3447 | module_init(isert_init); | |
3448 | module_exit(isert_exit); |