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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 | |
302cc7c3 SG |
68 | static inline bool |
69 | isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) | |
70 | { | |
23a548ee | 71 | return (conn->pi_support && |
302cc7c3 SG |
72 | cmd->prot_op != TARGET_PROT_NORMAL); |
73 | } | |
74 | ||
75 | ||
b8d26b3b NB |
76 | static void |
77 | isert_qp_event_callback(struct ib_event *e, void *context) | |
78 | { | |
6700425e | 79 | struct isert_conn *isert_conn = context; |
b8d26b3b | 80 | |
4c22e07f | 81 | isert_err("conn %p event: %d\n", isert_conn, e->event); |
b8d26b3b NB |
82 | switch (e->event) { |
83 | case IB_EVENT_COMM_EST: | |
dac6ab30 | 84 | rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST); |
b8d26b3b NB |
85 | break; |
86 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
4c22e07f | 87 | isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); |
b8d26b3b NB |
88 | break; |
89 | default: | |
90 | break; | |
91 | } | |
92 | } | |
93 | ||
94 | static int | |
95 | isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) | |
96 | { | |
97 | int ret; | |
98 | ||
99 | ret = ib_query_device(ib_dev, devattr); | |
100 | if (ret) { | |
24f412dd | 101 | isert_err("ib_query_device() failed: %d\n", ret); |
b8d26b3b NB |
102 | return ret; |
103 | } | |
24f412dd SG |
104 | isert_dbg("devattr->max_sge: %d\n", devattr->max_sge); |
105 | isert_dbg("devattr->max_sge_rd: %d\n", devattr->max_sge_rd); | |
b8d26b3b NB |
106 | |
107 | return 0; | |
108 | } | |
109 | ||
40fc069a SG |
110 | static struct isert_comp * |
111 | isert_comp_get(struct isert_conn *isert_conn) | |
b8d26b3b | 112 | { |
dac6ab30 | 113 | struct isert_device *device = isert_conn->device; |
4a295bae | 114 | struct isert_comp *comp; |
40fc069a | 115 | int i, min = 0; |
b8d26b3b | 116 | |
b8d26b3b | 117 | mutex_lock(&device_list_mutex); |
4a295bae SG |
118 | for (i = 0; i < device->comps_used; i++) |
119 | if (device->comps[i].active_qps < | |
120 | device->comps[min].active_qps) | |
121 | min = i; | |
122 | comp = &device->comps[min]; | |
123 | comp->active_qps++; | |
40fc069a SG |
124 | mutex_unlock(&device_list_mutex); |
125 | ||
24f412dd | 126 | isert_info("conn %p, using comp %p min_index: %d\n", |
4a295bae | 127 | isert_conn, comp, min); |
40fc069a SG |
128 | |
129 | return comp; | |
130 | } | |
131 | ||
132 | static void | |
133 | isert_comp_put(struct isert_comp *comp) | |
134 | { | |
135 | mutex_lock(&device_list_mutex); | |
136 | comp->active_qps--; | |
b8d26b3b | 137 | mutex_unlock(&device_list_mutex); |
40fc069a SG |
138 | } |
139 | ||
140 | static struct ib_qp * | |
141 | isert_create_qp(struct isert_conn *isert_conn, | |
142 | struct isert_comp *comp, | |
143 | struct rdma_cm_id *cma_id) | |
144 | { | |
dac6ab30 | 145 | struct isert_device *device = isert_conn->device; |
40fc069a SG |
146 | struct ib_qp_init_attr attr; |
147 | int ret; | |
b8d26b3b NB |
148 | |
149 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); | |
150 | attr.event_handler = isert_qp_event_callback; | |
151 | attr.qp_context = isert_conn; | |
6f0fae3d SG |
152 | attr.send_cq = comp->cq; |
153 | attr.recv_cq = comp->cq; | |
b8d26b3b | 154 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; |
bdf20e72 | 155 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; |
b8d26b3b NB |
156 | /* |
157 | * FIXME: Use devattr.max_sge - 2 for max_send_sge as | |
f57915cf OG |
158 | * work-around for RDMA_READs with ConnectX-2. |
159 | * | |
160 | * Also, still make sure to have at least two SGEs for | |
161 | * outgoing control PDU responses. | |
b8d26b3b | 162 | */ |
f57915cf | 163 | attr.cap.max_send_sge = max(2, device->dev_attr.max_sge - 2); |
b8d26b3b NB |
164 | isert_conn->max_sge = attr.cap.max_send_sge; |
165 | ||
166 | attr.cap.max_recv_sge = 1; | |
167 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
168 | attr.qp_type = IB_QPT_RC; | |
570db170 | 169 | if (device->pi_capable) |
d3e125da | 170 | attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; |
b8d26b3b | 171 | |
67cb3949 | 172 | ret = rdma_create_qp(cma_id, device->pd, &attr); |
b8d26b3b | 173 | if (ret) { |
24f412dd | 174 | isert_err("rdma_create_qp failed for cma_id %d\n", ret); |
40fc069a SG |
175 | return ERR_PTR(ret); |
176 | } | |
177 | ||
178 | return cma_id->qp; | |
179 | } | |
180 | ||
181 | static int | |
182 | isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) | |
183 | { | |
184 | struct isert_comp *comp; | |
185 | int ret; | |
186 | ||
187 | comp = isert_comp_get(isert_conn); | |
dac6ab30 SG |
188 | isert_conn->qp = isert_create_qp(isert_conn, comp, cma_id); |
189 | if (IS_ERR(isert_conn->qp)) { | |
190 | ret = PTR_ERR(isert_conn->qp); | |
19e2090f | 191 | goto err; |
b8d26b3b | 192 | } |
b8d26b3b NB |
193 | |
194 | return 0; | |
19e2090f | 195 | err: |
40fc069a | 196 | isert_comp_put(comp); |
19e2090f | 197 | return ret; |
b8d26b3b NB |
198 | } |
199 | ||
200 | static void | |
201 | isert_cq_event_callback(struct ib_event *e, void *context) | |
202 | { | |
4c22e07f | 203 | isert_dbg("event: %d\n", e->event); |
b8d26b3b NB |
204 | } |
205 | ||
206 | static int | |
207 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
208 | { | |
dac6ab30 | 209 | struct isert_device *device = isert_conn->device; |
67cb3949 | 210 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
211 | struct iser_rx_desc *rx_desc; |
212 | struct ib_sge *rx_sg; | |
213 | u64 dma_addr; | |
214 | int i, j; | |
215 | ||
dac6ab30 | 216 | isert_conn->rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * |
b8d26b3b | 217 | sizeof(struct iser_rx_desc), GFP_KERNEL); |
dac6ab30 | 218 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
219 | goto fail; |
220 | ||
dac6ab30 | 221 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
222 | |
223 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
224 | dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, | |
225 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
226 | if (ib_dma_mapping_error(ib_dev, dma_addr)) | |
227 | goto dma_map_fail; | |
228 | ||
229 | rx_desc->dma_addr = dma_addr; | |
230 | ||
231 | rx_sg = &rx_desc->rx_sg; | |
232 | rx_sg->addr = rx_desc->dma_addr; | |
233 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; | |
67cb3949 | 234 | rx_sg->lkey = device->mr->lkey; |
b8d26b3b NB |
235 | } |
236 | ||
dac6ab30 | 237 | isert_conn->rx_desc_head = 0; |
4c22e07f | 238 | |
b8d26b3b NB |
239 | return 0; |
240 | ||
241 | dma_map_fail: | |
dac6ab30 | 242 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
243 | for (j = 0; j < i; j++, rx_desc++) { |
244 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
245 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
246 | } | |
dac6ab30 SG |
247 | kfree(isert_conn->rx_descs); |
248 | isert_conn->rx_descs = NULL; | |
b8d26b3b | 249 | fail: |
4c22e07f SG |
250 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
251 | ||
b8d26b3b NB |
252 | return -ENOMEM; |
253 | } | |
254 | ||
255 | static void | |
256 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
257 | { | |
dac6ab30 | 258 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
259 | struct iser_rx_desc *rx_desc; |
260 | int i; | |
261 | ||
dac6ab30 | 262 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
263 | return; |
264 | ||
dac6ab30 | 265 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
266 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
267 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
268 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
269 | } | |
270 | ||
dac6ab30 SG |
271 | kfree(isert_conn->rx_descs); |
272 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
273 | } |
274 | ||
6f0fae3d SG |
275 | static void isert_cq_work(struct work_struct *); |
276 | static void isert_cq_callback(struct ib_cq *, void *); | |
b8d26b3b | 277 | |
172369c5 SG |
278 | static void |
279 | isert_free_comps(struct isert_device *device) | |
b8d26b3b | 280 | { |
172369c5 | 281 | int i; |
59464ef4 | 282 | |
172369c5 SG |
283 | for (i = 0; i < device->comps_used; i++) { |
284 | struct isert_comp *comp = &device->comps[i]; | |
b1a5ad00 | 285 | |
172369c5 SG |
286 | if (comp->cq) { |
287 | cancel_work_sync(&comp->work); | |
288 | ib_destroy_cq(comp->cq); | |
289 | } | |
59464ef4 | 290 | } |
172369c5 SG |
291 | kfree(device->comps); |
292 | } | |
d40945d8 | 293 | |
172369c5 SG |
294 | static int |
295 | isert_alloc_comps(struct isert_device *device, | |
296 | struct ib_device_attr *attr) | |
297 | { | |
298 | int i, max_cqe, ret = 0; | |
d3e125da | 299 | |
4a295bae | 300 | device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), |
172369c5 SG |
301 | device->ib_device->num_comp_vectors)); |
302 | ||
24f412dd | 303 | isert_info("Using %d CQs, %s supports %d vectors support " |
4a295bae SG |
304 | "Fast registration %d pi_capable %d\n", |
305 | device->comps_used, device->ib_device->name, | |
306 | device->ib_device->num_comp_vectors, device->use_fastreg, | |
307 | device->pi_capable); | |
308 | ||
309 | device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), | |
310 | GFP_KERNEL); | |
311 | if (!device->comps) { | |
24f412dd | 312 | isert_err("Unable to allocate completion contexts\n"); |
b8d26b3b NB |
313 | return -ENOMEM; |
314 | } | |
4a295bae | 315 | |
172369c5 SG |
316 | max_cqe = min(ISER_MAX_CQ_LEN, attr->max_cqe); |
317 | ||
4a295bae SG |
318 | for (i = 0; i < device->comps_used; i++) { |
319 | struct isert_comp *comp = &device->comps[i]; | |
320 | ||
321 | comp->device = device; | |
6f0fae3d SG |
322 | INIT_WORK(&comp->work, isert_cq_work); |
323 | comp->cq = ib_create_cq(device->ib_device, | |
324 | isert_cq_callback, | |
325 | isert_cq_event_callback, | |
326 | (void *)comp, | |
327 | max_cqe, i); | |
328 | if (IS_ERR(comp->cq)) { | |
172369c5 | 329 | isert_err("Unable to allocate cq\n"); |
6f0fae3d SG |
330 | ret = PTR_ERR(comp->cq); |
331 | comp->cq = NULL; | |
b8d26b3b | 332 | goto out_cq; |
94a71110 | 333 | } |
b8d26b3b | 334 | |
6f0fae3d | 335 | ret = ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
94a71110 | 336 | if (ret) |
b8d26b3b NB |
337 | goto out_cq; |
338 | } | |
339 | ||
172369c5 SG |
340 | return 0; |
341 | out_cq: | |
342 | isert_free_comps(device); | |
343 | return ret; | |
344 | } | |
345 | ||
346 | static int | |
347 | isert_create_device_ib_res(struct isert_device *device) | |
348 | { | |
172369c5 | 349 | struct ib_device_attr *dev_attr; |
fd8205e8 | 350 | int ret; |
172369c5 SG |
351 | |
352 | dev_attr = &device->dev_attr; | |
fd8205e8 | 353 | ret = isert_query_device(device->ib_device, dev_attr); |
172369c5 SG |
354 | if (ret) |
355 | return ret; | |
356 | ||
357 | /* asign function handlers */ | |
358 | if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS && | |
359 | dev_attr->device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) { | |
360 | device->use_fastreg = 1; | |
361 | device->reg_rdma_mem = isert_reg_rdma; | |
362 | device->unreg_rdma_mem = isert_unreg_rdma; | |
363 | } else { | |
364 | device->use_fastreg = 0; | |
365 | device->reg_rdma_mem = isert_map_rdma; | |
366 | device->unreg_rdma_mem = isert_unmap_cmd; | |
367 | } | |
368 | ||
369 | ret = isert_alloc_comps(device, dev_attr); | |
370 | if (ret) | |
371 | return ret; | |
372 | ||
67cb3949 SG |
373 | device->pd = ib_alloc_pd(device->ib_device); |
374 | if (IS_ERR(device->pd)) { | |
375 | ret = PTR_ERR(device->pd); | |
376 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
377 | device, ret); | |
378 | goto out_cq; | |
379 | } | |
380 | ||
381 | device->mr = ib_get_dma_mr(device->pd, IB_ACCESS_LOCAL_WRITE); | |
382 | if (IS_ERR(device->mr)) { | |
383 | ret = PTR_ERR(device->mr); | |
384 | isert_err("failed to create dma mr, device %p, ret=%d\n", | |
385 | device, ret); | |
386 | goto out_mr; | |
387 | } | |
388 | ||
172369c5 SG |
389 | /* Check signature cap */ |
390 | device->pi_capable = dev_attr->device_cap_flags & | |
391 | IB_DEVICE_SIGNATURE_HANDOVER ? true : false; | |
67cb3949 | 392 | |
b8d26b3b NB |
393 | return 0; |
394 | ||
67cb3949 SG |
395 | out_mr: |
396 | ib_dealloc_pd(device->pd); | |
b8d26b3b | 397 | out_cq: |
172369c5 | 398 | isert_free_comps(device); |
b8d26b3b NB |
399 | return ret; |
400 | } | |
401 | ||
402 | static void | |
403 | isert_free_device_ib_res(struct isert_device *device) | |
404 | { | |
24f412dd | 405 | isert_info("device %p\n", device); |
b8d26b3b | 406 | |
67cb3949 SG |
407 | ib_dereg_mr(device->mr); |
408 | ib_dealloc_pd(device->pd); | |
172369c5 | 409 | isert_free_comps(device); |
b8d26b3b NB |
410 | } |
411 | ||
412 | static void | |
cf8ae958 | 413 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
414 | { |
415 | mutex_lock(&device_list_mutex); | |
416 | device->refcount--; | |
4c22e07f | 417 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
418 | if (!device->refcount) { |
419 | isert_free_device_ib_res(device); | |
420 | list_del(&device->dev_node); | |
421 | kfree(device); | |
422 | } | |
423 | mutex_unlock(&device_list_mutex); | |
424 | } | |
425 | ||
426 | static struct isert_device * | |
cf8ae958 | 427 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
428 | { |
429 | struct isert_device *device; | |
430 | int ret; | |
431 | ||
432 | mutex_lock(&device_list_mutex); | |
433 | list_for_each_entry(device, &device_list, dev_node) { | |
434 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
435 | device->refcount++; | |
4c22e07f SG |
436 | isert_info("Found iser device %p refcount %d\n", |
437 | device, device->refcount); | |
b8d26b3b NB |
438 | mutex_unlock(&device_list_mutex); |
439 | return device; | |
440 | } | |
441 | } | |
442 | ||
443 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
444 | if (!device) { | |
445 | mutex_unlock(&device_list_mutex); | |
446 | return ERR_PTR(-ENOMEM); | |
447 | } | |
448 | ||
449 | INIT_LIST_HEAD(&device->dev_node); | |
450 | ||
451 | device->ib_device = cma_id->device; | |
452 | ret = isert_create_device_ib_res(device); | |
453 | if (ret) { | |
454 | kfree(device); | |
455 | mutex_unlock(&device_list_mutex); | |
456 | return ERR_PTR(ret); | |
457 | } | |
458 | ||
459 | device->refcount++; | |
460 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
461 | isert_info("Created a new iser device %p refcount %d\n", |
462 | device, device->refcount); | |
b8d26b3b NB |
463 | mutex_unlock(&device_list_mutex); |
464 | ||
465 | return device; | |
466 | } | |
467 | ||
59464ef4 | 468 | static void |
a3a5a826 | 469 | isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
470 | { |
471 | struct fast_reg_descriptor *fr_desc, *tmp; | |
472 | int i = 0; | |
473 | ||
dac6ab30 | 474 | if (list_empty(&isert_conn->fr_pool)) |
59464ef4 VP |
475 | return; |
476 | ||
4c22e07f | 477 | isert_info("Freeing conn %p fastreg pool", isert_conn); |
59464ef4 VP |
478 | |
479 | list_for_each_entry_safe(fr_desc, tmp, | |
dac6ab30 | 480 | &isert_conn->fr_pool, list) { |
59464ef4 VP |
481 | list_del(&fr_desc->list); |
482 | ib_free_fast_reg_page_list(fr_desc->data_frpl); | |
483 | ib_dereg_mr(fr_desc->data_mr); | |
d3e125da SG |
484 | if (fr_desc->pi_ctx) { |
485 | ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl); | |
486 | ib_dereg_mr(fr_desc->pi_ctx->prot_mr); | |
487 | ib_destroy_mr(fr_desc->pi_ctx->sig_mr); | |
488 | kfree(fr_desc->pi_ctx); | |
489 | } | |
59464ef4 VP |
490 | kfree(fr_desc); |
491 | ++i; | |
492 | } | |
493 | ||
dac6ab30 | 494 | if (i < isert_conn->fr_pool_size) |
24f412dd | 495 | isert_warn("Pool still has %d regions registered\n", |
dac6ab30 | 496 | isert_conn->fr_pool_size - i); |
59464ef4 VP |
497 | } |
498 | ||
570db170 SG |
499 | static int |
500 | isert_create_pi_ctx(struct fast_reg_descriptor *desc, | |
501 | struct ib_device *device, | |
502 | struct ib_pd *pd) | |
503 | { | |
504 | struct ib_mr_init_attr mr_init_attr; | |
505 | struct pi_context *pi_ctx; | |
506 | int ret; | |
507 | ||
508 | pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL); | |
509 | if (!pi_ctx) { | |
24f412dd | 510 | isert_err("Failed to allocate pi context\n"); |
570db170 SG |
511 | return -ENOMEM; |
512 | } | |
513 | ||
514 | pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(device, | |
515 | ISCSI_ISER_SG_TABLESIZE); | |
516 | if (IS_ERR(pi_ctx->prot_frpl)) { | |
24f412dd | 517 | isert_err("Failed to allocate prot frpl err=%ld\n", |
570db170 SG |
518 | PTR_ERR(pi_ctx->prot_frpl)); |
519 | ret = PTR_ERR(pi_ctx->prot_frpl); | |
520 | goto err_pi_ctx; | |
521 | } | |
522 | ||
523 | pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); | |
524 | if (IS_ERR(pi_ctx->prot_mr)) { | |
24f412dd | 525 | isert_err("Failed to allocate prot frmr err=%ld\n", |
570db170 SG |
526 | PTR_ERR(pi_ctx->prot_mr)); |
527 | ret = PTR_ERR(pi_ctx->prot_mr); | |
528 | goto err_prot_frpl; | |
529 | } | |
530 | desc->ind |= ISERT_PROT_KEY_VALID; | |
531 | ||
532 | memset(&mr_init_attr, 0, sizeof(mr_init_attr)); | |
533 | mr_init_attr.max_reg_descriptors = 2; | |
534 | mr_init_attr.flags |= IB_MR_SIGNATURE_EN; | |
535 | pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr); | |
536 | if (IS_ERR(pi_ctx->sig_mr)) { | |
24f412dd | 537 | isert_err("Failed to allocate signature enabled mr err=%ld\n", |
570db170 SG |
538 | PTR_ERR(pi_ctx->sig_mr)); |
539 | ret = PTR_ERR(pi_ctx->sig_mr); | |
540 | goto err_prot_mr; | |
541 | } | |
542 | ||
543 | desc->pi_ctx = pi_ctx; | |
544 | desc->ind |= ISERT_SIG_KEY_VALID; | |
545 | desc->ind &= ~ISERT_PROTECTED; | |
546 | ||
547 | return 0; | |
548 | ||
549 | err_prot_mr: | |
550 | ib_dereg_mr(desc->pi_ctx->prot_mr); | |
551 | err_prot_frpl: | |
552 | ib_free_fast_reg_page_list(desc->pi_ctx->prot_frpl); | |
553 | err_pi_ctx: | |
554 | kfree(desc->pi_ctx); | |
555 | ||
556 | return ret; | |
557 | } | |
558 | ||
dc87a90f SG |
559 | static int |
560 | isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, | |
570db170 | 561 | struct fast_reg_descriptor *fr_desc) |
dc87a90f | 562 | { |
d3e125da SG |
563 | int ret; |
564 | ||
dc87a90f SG |
565 | fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device, |
566 | ISCSI_ISER_SG_TABLESIZE); | |
567 | if (IS_ERR(fr_desc->data_frpl)) { | |
24f412dd | 568 | isert_err("Failed to allocate data frpl err=%ld\n", |
4c22e07f | 569 | PTR_ERR(fr_desc->data_frpl)); |
dc87a90f SG |
570 | return PTR_ERR(fr_desc->data_frpl); |
571 | } | |
572 | ||
573 | fr_desc->data_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); | |
574 | if (IS_ERR(fr_desc->data_mr)) { | |
24f412dd | 575 | isert_err("Failed to allocate data frmr err=%ld\n", |
4c22e07f | 576 | PTR_ERR(fr_desc->data_mr)); |
d3e125da SG |
577 | ret = PTR_ERR(fr_desc->data_mr); |
578 | goto err_data_frpl; | |
dc87a90f | 579 | } |
d3e125da SG |
580 | fr_desc->ind |= ISERT_DATA_KEY_VALID; |
581 | ||
24f412dd | 582 | isert_dbg("Created fr_desc %p\n", fr_desc); |
dc87a90f SG |
583 | |
584 | return 0; | |
570db170 | 585 | |
d3e125da SG |
586 | err_data_frpl: |
587 | ib_free_fast_reg_page_list(fr_desc->data_frpl); | |
588 | ||
589 | return ret; | |
59464ef4 VP |
590 | } |
591 | ||
592 | static int | |
570db170 | 593 | isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
594 | { |
595 | struct fast_reg_descriptor *fr_desc; | |
dac6ab30 | 596 | struct isert_device *device = isert_conn->device; |
f46d6a8a NB |
597 | struct se_session *se_sess = isert_conn->conn->sess->se_sess; |
598 | struct se_node_acl *se_nacl = se_sess->se_node_acl; | |
599 | int i, ret, tag_num; | |
600 | /* | |
601 | * Setup the number of FRMRs based upon the number of tags | |
602 | * available to session in iscsi_target_locate_portal(). | |
603 | */ | |
604 | tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth); | |
605 | tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; | |
59464ef4 | 606 | |
dac6ab30 | 607 | isert_conn->fr_pool_size = 0; |
f46d6a8a | 608 | for (i = 0; i < tag_num; i++) { |
59464ef4 VP |
609 | fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); |
610 | if (!fr_desc) { | |
24f412dd | 611 | isert_err("Failed to allocate fast_reg descriptor\n"); |
59464ef4 VP |
612 | ret = -ENOMEM; |
613 | goto err; | |
614 | } | |
615 | ||
dc87a90f | 616 | ret = isert_create_fr_desc(device->ib_device, |
67cb3949 | 617 | device->pd, fr_desc); |
dc87a90f | 618 | if (ret) { |
24f412dd | 619 | isert_err("Failed to create fastreg descriptor err=%d\n", |
dc87a90f | 620 | ret); |
a80e21b3 | 621 | kfree(fr_desc); |
59464ef4 VP |
622 | goto err; |
623 | } | |
59464ef4 | 624 | |
dac6ab30 SG |
625 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); |
626 | isert_conn->fr_pool_size++; | |
59464ef4 VP |
627 | } |
628 | ||
24f412dd | 629 | isert_dbg("Creating conn %p fastreg pool size=%d", |
dac6ab30 | 630 | isert_conn, isert_conn->fr_pool_size); |
59464ef4 VP |
631 | |
632 | return 0; | |
633 | ||
634 | err: | |
a3a5a826 | 635 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 VP |
636 | return ret; |
637 | } | |
638 | ||
ae9ea9ed SG |
639 | static void |
640 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 641 | { |
b8d26b3b | 642 | isert_conn->state = ISER_CONN_INIT; |
dac6ab30 SG |
643 | INIT_LIST_HEAD(&isert_conn->accept_node); |
644 | init_completion(&isert_conn->login_comp); | |
2371e5da | 645 | init_completion(&isert_conn->login_req_comp); |
dac6ab30 SG |
646 | init_completion(&isert_conn->wait); |
647 | kref_init(&isert_conn->kref); | |
648 | mutex_init(&isert_conn->mutex); | |
649 | spin_lock_init(&isert_conn->pool_lock); | |
650 | INIT_LIST_HEAD(&isert_conn->fr_pool); | |
ae9ea9ed | 651 | } |
b8d26b3b | 652 | |
ae9ea9ed SG |
653 | static void |
654 | isert_free_login_buf(struct isert_conn *isert_conn) | |
655 | { | |
dac6ab30 | 656 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
657 | |
658 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
659 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
660 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
661 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
662 | DMA_FROM_DEVICE); | |
663 | kfree(isert_conn->login_buf); | |
664 | } | |
665 | ||
666 | static int | |
667 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
668 | struct ib_device *ib_dev) | |
669 | { | |
670 | int ret; | |
b8d26b3b NB |
671 | |
672 | isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + | |
673 | ISER_RX_LOGIN_SIZE, GFP_KERNEL); | |
674 | if (!isert_conn->login_buf) { | |
24f412dd | 675 | isert_err("Unable to allocate isert_conn->login_buf\n"); |
ae9ea9ed | 676 | return -ENOMEM; |
b8d26b3b NB |
677 | } |
678 | ||
679 | isert_conn->login_req_buf = isert_conn->login_buf; | |
680 | isert_conn->login_rsp_buf = isert_conn->login_buf + | |
681 | ISCSI_DEF_MAX_RECV_SEG_LEN; | |
ae9ea9ed | 682 | |
24f412dd | 683 | isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", |
b8d26b3b NB |
684 | isert_conn->login_buf, isert_conn->login_req_buf, |
685 | isert_conn->login_rsp_buf); | |
686 | ||
687 | isert_conn->login_req_dma = ib_dma_map_single(ib_dev, | |
688 | (void *)isert_conn->login_req_buf, | |
689 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
690 | ||
691 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); | |
692 | if (ret) { | |
ae9ea9ed | 693 | isert_err("login_req_dma mapping error: %d\n", ret); |
b8d26b3b NB |
694 | isert_conn->login_req_dma = 0; |
695 | goto out_login_buf; | |
696 | } | |
697 | ||
698 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
699 | (void *)isert_conn->login_rsp_buf, | |
700 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
701 | ||
702 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); | |
703 | if (ret) { | |
ae9ea9ed | 704 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b NB |
705 | isert_conn->login_rsp_dma = 0; |
706 | goto out_req_dma_map; | |
707 | } | |
708 | ||
ae9ea9ed SG |
709 | return 0; |
710 | ||
711 | out_req_dma_map: | |
712 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
713 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
714 | out_login_buf: | |
715 | kfree(isert_conn->login_buf); | |
716 | return ret; | |
717 | } | |
718 | ||
719 | static int | |
720 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
721 | { | |
722 | struct isert_np *isert_np = cma_id->context; | |
723 | struct iscsi_np *np = isert_np->np; | |
724 | struct isert_conn *isert_conn; | |
725 | struct isert_device *device; | |
726 | int ret = 0; | |
727 | ||
728 | spin_lock_bh(&np->np_thread_lock); | |
729 | if (!np->enabled) { | |
730 | spin_unlock_bh(&np->np_thread_lock); | |
731 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
732 | return rdma_reject(cma_id, NULL, 0); | |
733 | } | |
734 | spin_unlock_bh(&np->np_thread_lock); | |
735 | ||
736 | isert_dbg("cma_id: %p, portal: %p\n", | |
737 | cma_id, cma_id->context); | |
738 | ||
739 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
740 | if (!isert_conn) | |
741 | return -ENOMEM; | |
742 | ||
743 | isert_init_conn(isert_conn); | |
dac6ab30 | 744 | isert_conn->cm_id = cma_id; |
ae9ea9ed SG |
745 | |
746 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); | |
747 | if (ret) | |
748 | goto out; | |
749 | ||
cf8ae958 | 750 | device = isert_device_get(cma_id); |
b8d26b3b NB |
751 | if (IS_ERR(device)) { |
752 | ret = PTR_ERR(device); | |
753 | goto out_rsp_dma_map; | |
754 | } | |
dac6ab30 | 755 | isert_conn->device = device; |
b8d26b3b | 756 | |
1a92e17e SG |
757 | /* Set max inflight RDMA READ requests */ |
758 | isert_conn->initiator_depth = min_t(u8, | |
759 | event->param.conn.initiator_depth, | |
760 | device->dev_attr.max_qp_init_rd_atom); | |
24f412dd | 761 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); |
1a92e17e | 762 | |
570db170 | 763 | ret = isert_conn_setup_qp(isert_conn, cma_id); |
b8d26b3b NB |
764 | if (ret) |
765 | goto out_conn_dev; | |
766 | ||
2371e5da SG |
767 | ret = isert_rdma_post_recvl(isert_conn); |
768 | if (ret) | |
769 | goto out_conn_dev; | |
770 | ||
771 | ret = isert_rdma_accept(isert_conn); | |
772 | if (ret) | |
773 | goto out_conn_dev; | |
774 | ||
b8d26b3b | 775 | mutex_lock(&isert_np->np_accept_mutex); |
dac6ab30 | 776 | list_add_tail(&isert_conn->accept_node, &isert_np->np_accept_list); |
b8d26b3b NB |
777 | mutex_unlock(&isert_np->np_accept_mutex); |
778 | ||
24f412dd | 779 | isert_info("np %p: Allow accept_np to continue\n", np); |
531b7bf4 | 780 | up(&isert_np->np_sem); |
b8d26b3b NB |
781 | return 0; |
782 | ||
783 | out_conn_dev: | |
cf8ae958 | 784 | isert_device_put(device); |
b8d26b3b | 785 | out_rsp_dma_map: |
ae9ea9ed | 786 | isert_free_login_buf(isert_conn); |
b8d26b3b NB |
787 | out: |
788 | kfree(isert_conn); | |
2371e5da | 789 | rdma_reject(cma_id, NULL, 0); |
b8d26b3b NB |
790 | return ret; |
791 | } | |
792 | ||
793 | static void | |
794 | isert_connect_release(struct isert_conn *isert_conn) | |
795 | { | |
dac6ab30 | 796 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 797 | |
4c22e07f | 798 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 799 | |
57df81e3 SG |
800 | BUG_ON(!device); |
801 | ||
802 | if (device->use_fastreg) | |
a3a5a826 | 803 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 | 804 | |
19e2090f | 805 | isert_free_rx_descriptors(isert_conn); |
dac6ab30 SG |
806 | if (isert_conn->cm_id) |
807 | rdma_destroy_id(isert_conn->cm_id); | |
19e2090f | 808 | |
dac6ab30 SG |
809 | if (isert_conn->qp) { |
810 | struct isert_comp *comp = isert_conn->qp->recv_cq->cq_context; | |
4a295bae | 811 | |
40fc069a | 812 | isert_comp_put(comp); |
dac6ab30 | 813 | ib_destroy_qp(isert_conn->qp); |
b8d26b3b NB |
814 | } |
815 | ||
ae9ea9ed SG |
816 | if (isert_conn->login_buf) |
817 | isert_free_login_buf(isert_conn); | |
818 | ||
57df81e3 | 819 | isert_device_put(device); |
b8d26b3b | 820 | |
57df81e3 | 821 | kfree(isert_conn); |
b8d26b3b NB |
822 | } |
823 | ||
824 | static void | |
825 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
826 | { | |
19e2090f | 827 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
c2f88b17 | 828 | |
24f412dd | 829 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 830 | |
dac6ab30 | 831 | if (!kref_get_unless_zero(&isert_conn->kref)) { |
24f412dd | 832 | isert_warn("conn %p connect_release is running\n", isert_conn); |
2371e5da SG |
833 | return; |
834 | } | |
835 | ||
dac6ab30 | 836 | mutex_lock(&isert_conn->mutex); |
2371e5da SG |
837 | if (isert_conn->state != ISER_CONN_FULL_FEATURE) |
838 | isert_conn->state = ISER_CONN_UP; | |
dac6ab30 | 839 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
840 | } |
841 | ||
842 | static void | |
dac6ab30 | 843 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
844 | { |
845 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 846 | struct isert_conn, kref); |
b8d26b3b | 847 | |
4c22e07f SG |
848 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
849 | current->pid); | |
b8d26b3b NB |
850 | |
851 | isert_connect_release(isert_conn); | |
852 | } | |
853 | ||
854 | static void | |
855 | isert_put_conn(struct isert_conn *isert_conn) | |
856 | { | |
dac6ab30 | 857 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
858 | } |
859 | ||
954f2372 SG |
860 | /** |
861 | * isert_conn_terminate() - Initiate connection termination | |
862 | * @isert_conn: isert connection struct | |
863 | * | |
864 | * Notes: | |
128e9cc8 | 865 | * In case the connection state is FULL_FEATURE, move state |
954f2372 | 866 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 867 | * In case the connection state is UP, complete flush as well. |
954f2372 | 868 | * |
dac6ab30 | 869 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
870 | * safe to call multiple times. |
871 | */ | |
872 | static void | |
873 | isert_conn_terminate(struct isert_conn *isert_conn) | |
874 | { | |
875 | int err; | |
876 | ||
128e9cc8 SG |
877 | switch (isert_conn->state) { |
878 | case ISER_CONN_TERMINATING: | |
879 | break; | |
880 | case ISER_CONN_UP: | |
128e9cc8 | 881 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ |
24f412dd | 882 | isert_info("Terminating conn %p state %d\n", |
954f2372 | 883 | isert_conn, isert_conn->state); |
128e9cc8 | 884 | isert_conn->state = ISER_CONN_TERMINATING; |
dac6ab30 | 885 | err = rdma_disconnect(isert_conn->cm_id); |
954f2372 | 886 | if (err) |
24f412dd | 887 | isert_warn("Failed rdma_disconnect isert_conn %p\n", |
954f2372 | 888 | isert_conn); |
128e9cc8 SG |
889 | break; |
890 | default: | |
24f412dd | 891 | isert_warn("conn %p teminating in state %d\n", |
128e9cc8 | 892 | isert_conn, isert_conn->state); |
954f2372 SG |
893 | } |
894 | } | |
895 | ||
3b726ae2 | 896 | static int |
ca6c1d82 SG |
897 | isert_np_cma_handler(struct isert_np *isert_np, |
898 | enum rdma_cm_event_type event) | |
b8d26b3b | 899 | { |
24f412dd | 900 | isert_dbg("isert np %p, handling event %d\n", isert_np, event); |
3b726ae2 | 901 | |
ca6c1d82 SG |
902 | switch (event) { |
903 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
3b726ae2 | 904 | isert_np->np_cm_id = NULL; |
ca6c1d82 SG |
905 | break; |
906 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
907 | isert_np->np_cm_id = isert_setup_id(isert_np); | |
908 | if (IS_ERR(isert_np->np_cm_id)) { | |
24f412dd SG |
909 | isert_err("isert np %p setup id failed: %ld\n", |
910 | isert_np, PTR_ERR(isert_np->np_cm_id)); | |
ca6c1d82 SG |
911 | isert_np->np_cm_id = NULL; |
912 | } | |
913 | break; | |
914 | default: | |
24f412dd | 915 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 916 | isert_np, event); |
3b726ae2 SG |
917 | } |
918 | ||
ca6c1d82 SG |
919 | return -1; |
920 | } | |
921 | ||
922 | static int | |
923 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
924 | enum rdma_cm_event_type event) | |
925 | { | |
926 | struct isert_np *isert_np = cma_id->context; | |
927 | struct isert_conn *isert_conn; | |
928 | ||
929 | if (isert_np->np_cm_id == cma_id) | |
930 | return isert_np_cma_handler(cma_id->context, event); | |
931 | ||
19e2090f | 932 | isert_conn = cma_id->qp->qp_context; |
b8d26b3b | 933 | |
dac6ab30 | 934 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 935 | isert_conn_terminate(isert_conn); |
dac6ab30 | 936 | mutex_unlock(&isert_conn->mutex); |
128e9cc8 | 937 | |
dac6ab30 SG |
938 | isert_info("conn %p completing wait\n", isert_conn); |
939 | complete(&isert_conn->wait); | |
3b726ae2 SG |
940 | |
941 | return 0; | |
b8d26b3b NB |
942 | } |
943 | ||
4a579da2 | 944 | static int |
954f2372 SG |
945 | isert_connect_error(struct rdma_cm_id *cma_id) |
946 | { | |
19e2090f | 947 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
954f2372 | 948 | |
dac6ab30 | 949 | isert_conn->cm_id = NULL; |
954f2372 | 950 | isert_put_conn(isert_conn); |
4a579da2 SG |
951 | |
952 | return -1; | |
954f2372 SG |
953 | } |
954 | ||
b8d26b3b NB |
955 | static int |
956 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
957 | { | |
958 | int ret = 0; | |
959 | ||
4c22e07f SG |
960 | isert_info("event %d status %d id %p np %p\n", event->event, |
961 | event->status, cma_id, cma_id->context); | |
b8d26b3b NB |
962 | |
963 | switch (event->event) { | |
964 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
b8d26b3b | 965 | ret = isert_connect_request(cma_id, event); |
3b726ae2 | 966 | if (ret) |
4c22e07f | 967 | isert_err("failed handle connect request %d\n", ret); |
b8d26b3b NB |
968 | break; |
969 | case RDMA_CM_EVENT_ESTABLISHED: | |
b8d26b3b NB |
970 | isert_connected_handler(cma_id); |
971 | break; | |
88c4015f SG |
972 | case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ |
973 | case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ | |
974 | case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */ | |
88c4015f | 975 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 976 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 977 | break; |
954f2372 SG |
978 | case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ |
979 | case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ | |
b8d26b3b | 980 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 981 | ret = isert_connect_error(cma_id); |
954f2372 | 982 | break; |
b8d26b3b | 983 | default: |
24f412dd | 984 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
985 | break; |
986 | } | |
987 | ||
b8d26b3b NB |
988 | return ret; |
989 | } | |
990 | ||
991 | static int | |
992 | isert_post_recv(struct isert_conn *isert_conn, u32 count) | |
993 | { | |
994 | struct ib_recv_wr *rx_wr, *rx_wr_failed; | |
995 | int i, ret; | |
dac6ab30 | 996 | unsigned int rx_head = isert_conn->rx_desc_head; |
b8d26b3b NB |
997 | struct iser_rx_desc *rx_desc; |
998 | ||
dac6ab30 SG |
999 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
1000 | rx_desc = &isert_conn->rx_descs[rx_head]; | |
b0a191e7 | 1001 | rx_wr->wr_id = (uintptr_t)rx_desc; |
b8d26b3b NB |
1002 | rx_wr->sg_list = &rx_desc->rx_sg; |
1003 | rx_wr->num_sge = 1; | |
1004 | rx_wr->next = rx_wr + 1; | |
1005 | rx_head = (rx_head + 1) & (ISERT_QP_MAX_RECV_DTOS - 1); | |
1006 | } | |
1007 | ||
1008 | rx_wr--; | |
1009 | rx_wr->next = NULL; /* mark end of work requests list */ | |
1010 | ||
1011 | isert_conn->post_recv_buf_count += count; | |
dac6ab30 | 1012 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, |
b8d26b3b NB |
1013 | &rx_wr_failed); |
1014 | if (ret) { | |
24f412dd | 1015 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
b8d26b3b NB |
1016 | isert_conn->post_recv_buf_count -= count; |
1017 | } else { | |
11378cdb | 1018 | isert_dbg("Posted %d RX buffers\n", count); |
dac6ab30 | 1019 | isert_conn->rx_desc_head = rx_head; |
b8d26b3b NB |
1020 | } |
1021 | return ret; | |
1022 | } | |
1023 | ||
1024 | static int | |
1025 | isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) | |
1026 | { | |
dac6ab30 | 1027 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1028 | struct ib_send_wr send_wr, *send_wr_failed; |
1029 | int ret; | |
1030 | ||
1031 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
1032 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1033 | ||
1034 | send_wr.next = NULL; | |
b0a191e7 | 1035 | send_wr.wr_id = (uintptr_t)tx_desc; |
b8d26b3b NB |
1036 | send_wr.sg_list = tx_desc->tx_sg; |
1037 | send_wr.num_sge = tx_desc->num_sge; | |
1038 | send_wr.opcode = IB_WR_SEND; | |
1039 | send_wr.send_flags = IB_SEND_SIGNALED; | |
1040 | ||
dac6ab30 | 1041 | ret = ib_post_send(isert_conn->qp, &send_wr, &send_wr_failed); |
bdf20e72 | 1042 | if (ret) |
24f412dd | 1043 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
1044 | |
1045 | return ret; | |
1046 | } | |
1047 | ||
1048 | static void | |
1049 | isert_create_send_desc(struct isert_conn *isert_conn, | |
1050 | struct isert_cmd *isert_cmd, | |
1051 | struct iser_tx_desc *tx_desc) | |
1052 | { | |
dac6ab30 | 1053 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1054 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1055 | |
1056 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
1057 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1058 | ||
1059 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); | |
1060 | tx_desc->iser_header.flags = ISER_VER; | |
1061 | ||
1062 | tx_desc->num_sge = 1; | |
1063 | tx_desc->isert_cmd = isert_cmd; | |
1064 | ||
67cb3949 SG |
1065 | if (tx_desc->tx_sg[0].lkey != device->mr->lkey) { |
1066 | tx_desc->tx_sg[0].lkey = device->mr->lkey; | |
24f412dd | 1067 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
1068 | } |
1069 | } | |
1070 | ||
1071 | static int | |
1072 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
1073 | struct iser_tx_desc *tx_desc) | |
1074 | { | |
dac6ab30 | 1075 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1076 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1077 | u64 dma_addr; |
1078 | ||
1079 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
1080 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1081 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 1082 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
1083 | return -ENOMEM; |
1084 | } | |
1085 | ||
1086 | tx_desc->dma_addr = dma_addr; | |
1087 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
1088 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
67cb3949 | 1089 | tx_desc->tx_sg[0].lkey = device->mr->lkey; |
b8d26b3b | 1090 | |
4c22e07f SG |
1091 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
1092 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
1093 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
1094 | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static void | |
95b60f07 | 1099 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 1100 | struct ib_send_wr *send_wr) |
b8d26b3b | 1101 | { |
95b60f07 NB |
1102 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
1103 | ||
b8d26b3b | 1104 | isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; |
b0a191e7 | 1105 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
b8d26b3b | 1106 | send_wr->opcode = IB_WR_SEND; |
95b60f07 | 1107 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 1108 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 1109 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
1110 | } |
1111 | ||
1112 | static int | |
1113 | isert_rdma_post_recvl(struct isert_conn *isert_conn) | |
1114 | { | |
1115 | struct ib_recv_wr rx_wr, *rx_wr_fail; | |
1116 | struct ib_sge sge; | |
1117 | int ret; | |
1118 | ||
1119 | memset(&sge, 0, sizeof(struct ib_sge)); | |
1120 | sge.addr = isert_conn->login_req_dma; | |
1121 | sge.length = ISER_RX_LOGIN_SIZE; | |
dac6ab30 | 1122 | sge.lkey = isert_conn->device->mr->lkey; |
b8d26b3b | 1123 | |
24f412dd | 1124 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
1125 | sge.addr, sge.length, sge.lkey); |
1126 | ||
1127 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); | |
b0a191e7 | 1128 | rx_wr.wr_id = (uintptr_t)isert_conn->login_req_buf; |
b8d26b3b NB |
1129 | rx_wr.sg_list = &sge; |
1130 | rx_wr.num_sge = 1; | |
1131 | ||
1132 | isert_conn->post_recv_buf_count++; | |
dac6ab30 | 1133 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_fail); |
b8d26b3b | 1134 | if (ret) { |
24f412dd | 1135 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b NB |
1136 | isert_conn->post_recv_buf_count--; |
1137 | } | |
1138 | ||
b8d26b3b NB |
1139 | return ret; |
1140 | } | |
1141 | ||
1142 | static int | |
1143 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1144 | u32 length) | |
1145 | { | |
1146 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 1147 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1148 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 1149 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
1150 | int ret; |
1151 | ||
1152 | isert_create_send_desc(isert_conn, NULL, tx_desc); | |
1153 | ||
1154 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
1155 | sizeof(struct iscsi_hdr)); | |
1156 | ||
1157 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
1158 | ||
1159 | if (length > 0) { | |
1160 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
1161 | ||
1162 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
1163 | length, DMA_TO_DEVICE); | |
1164 | ||
1165 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
1166 | ||
1167 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
1168 | length, DMA_TO_DEVICE); | |
1169 | ||
1170 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
1171 | tx_dsg->length = length; | |
dac6ab30 | 1172 | tx_dsg->lkey = isert_conn->device->mr->lkey; |
b8d26b3b NB |
1173 | tx_desc->num_sge = 2; |
1174 | } | |
1175 | if (!login->login_failed) { | |
1176 | if (login->login_complete) { | |
e0546fc1 | 1177 | if (!conn->sess->sess_ops->SessionType && |
dac6ab30 | 1178 | isert_conn->device->use_fastreg) { |
570db170 | 1179 | ret = isert_conn_create_fastreg_pool(isert_conn); |
f46d6a8a | 1180 | if (ret) { |
24f412dd | 1181 | isert_err("Conn: %p failed to create" |
f46d6a8a NB |
1182 | " fastreg pool\n", isert_conn); |
1183 | return ret; | |
1184 | } | |
1185 | } | |
1186 | ||
b8d26b3b NB |
1187 | ret = isert_alloc_rx_descriptors(isert_conn); |
1188 | if (ret) | |
1189 | return ret; | |
1190 | ||
1191 | ret = isert_post_recv(isert_conn, ISERT_MIN_POSTED_RX); | |
1192 | if (ret) | |
1193 | return ret; | |
1194 | ||
128e9cc8 | 1195 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 1196 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 1197 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 1198 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
1199 | goto post_send; |
1200 | } | |
1201 | ||
1202 | ret = isert_rdma_post_recvl(isert_conn); | |
1203 | if (ret) | |
1204 | return ret; | |
1205 | } | |
1206 | post_send: | |
1207 | ret = isert_post_send(isert_conn, tx_desc); | |
1208 | if (ret) | |
1209 | return ret; | |
1210 | ||
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static void | |
2371e5da | 1215 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 1216 | { |
2371e5da SG |
1217 | struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf; |
1218 | int rx_buflen = isert_conn->login_req_len; | |
b8d26b3b NB |
1219 | struct iscsi_conn *conn = isert_conn->conn; |
1220 | struct iscsi_login *login = conn->conn_login; | |
1221 | int size; | |
1222 | ||
24f412dd | 1223 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
1224 | |
1225 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
1226 | |
1227 | if (login->first_request) { | |
1228 | struct iscsi_login_req *login_req = | |
1229 | (struct iscsi_login_req *)&rx_desc->iscsi_header; | |
1230 | /* | |
1231 | * Setup the initial iscsi_login values from the leading | |
1232 | * login request PDU. | |
1233 | */ | |
1234 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
1235 | login->current_stage = | |
1236 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
1237 | >> 2; | |
1238 | login->version_min = login_req->min_version; | |
1239 | login->version_max = login_req->max_version; | |
1240 | memcpy(login->isid, login_req->isid, 6); | |
1241 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1242 | login->init_task_tag = login_req->itt; | |
1243 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1244 | login->cid = be16_to_cpu(login_req->cid); | |
1245 | login->tsih = be16_to_cpu(login_req->tsih); | |
1246 | } | |
1247 | ||
1248 | memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); | |
1249 | ||
1250 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1251 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1252 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1253 | MAX_KEY_VALUE_PAIRS); | |
b8d26b3b NB |
1254 | memcpy(login->req_buf, &rx_desc->data[0], size); |
1255 | ||
6faaa85f | 1256 | if (login->first_request) { |
dac6ab30 | 1257 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1258 | return; |
1259 | } | |
1260 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1261 | } |
1262 | ||
b8d26b3b | 1263 | static struct iscsi_cmd |
676687c6 | 1264 | *isert_allocate_cmd(struct iscsi_conn *conn) |
b8d26b3b | 1265 | { |
6700425e | 1266 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1267 | struct isert_cmd *isert_cmd; |
d703ce2f | 1268 | struct iscsi_cmd *cmd; |
b8d26b3b | 1269 | |
676687c6 | 1270 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1271 | if (!cmd) { |
24f412dd | 1272 | isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); |
b8d26b3b NB |
1273 | return NULL; |
1274 | } | |
d703ce2f | 1275 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1276 | isert_cmd->conn = isert_conn; |
d703ce2f | 1277 | isert_cmd->iscsi_cmd = cmd; |
b8d26b3b | 1278 | |
d703ce2f | 1279 | return cmd; |
b8d26b3b NB |
1280 | } |
1281 | ||
1282 | static int | |
1283 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1284 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1285 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1286 | { |
b8d26b3b NB |
1287 | struct iscsi_conn *conn = isert_conn->conn; |
1288 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1289 | struct scatterlist *sg; | |
1290 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; | |
1291 | bool dump_payload = false; | |
1292 | ||
1293 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1294 | if (rc < 0) | |
1295 | return rc; | |
1296 | ||
1297 | imm_data = cmd->immediate_data; | |
1298 | imm_data_len = cmd->first_burst_len; | |
1299 | unsol_data = cmd->unsolicited_data; | |
1300 | ||
1301 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1302 | if (rc < 0) { | |
1303 | return 0; | |
1304 | } else if (rc > 0) { | |
1305 | dump_payload = true; | |
1306 | goto sequence_cmd; | |
1307 | } | |
1308 | ||
1309 | if (!imm_data) | |
1310 | return 0; | |
1311 | ||
1312 | sg = &cmd->se_cmd.t_data_sg[0]; | |
1313 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1314 | ||
24f412dd | 1315 | isert_dbg("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n", |
4c22e07f | 1316 | sg, sg_nents, &rx_desc->data[0], imm_data_len); |
b8d26b3b NB |
1317 | |
1318 | sg_copy_from_buffer(sg, sg_nents, &rx_desc->data[0], imm_data_len); | |
1319 | ||
1320 | cmd->write_data_done += imm_data_len; | |
1321 | ||
1322 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1323 | spin_lock_bh(&cmd->istate_lock); | |
1324 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1325 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1326 | spin_unlock_bh(&cmd->istate_lock); | |
1327 | } | |
1328 | ||
1329 | sequence_cmd: | |
561bf158 | 1330 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b NB |
1331 | |
1332 | if (!rc && dump_payload == false && unsol_data) | |
1333 | iscsit_set_unsoliticed_dataout(cmd); | |
6cc44a6f NB |
1334 | else if (dump_payload && imm_data) |
1335 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
b8d26b3b | 1336 | |
b8d26b3b NB |
1337 | return 0; |
1338 | } | |
1339 | ||
1340 | static int | |
1341 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1342 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1343 | { | |
1344 | struct scatterlist *sg_start; | |
1345 | struct iscsi_conn *conn = isert_conn->conn; | |
1346 | struct iscsi_cmd *cmd = NULL; | |
1347 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1348 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1349 | int rc, sg_nents, sg_off, page_off; | |
1350 | ||
1351 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1352 | if (rc < 0) | |
1353 | return rc; | |
1354 | else if (!cmd) | |
1355 | return 0; | |
1356 | /* | |
1357 | * FIXME: Unexpected unsolicited_data out | |
1358 | */ | |
1359 | if (!cmd->unsolicited_data) { | |
24f412dd | 1360 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1361 | dump_stack(); |
1362 | return -1; | |
1363 | } | |
1364 | ||
4c22e07f SG |
1365 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1366 | "write_data_done: %u, data_length: %u\n", | |
1367 | unsol_data_len, cmd->write_data_done, | |
1368 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1369 | |
1370 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1371 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1372 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1373 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1374 | /* | |
1375 | * FIXME: Non page-aligned unsolicited_data out | |
1376 | */ | |
1377 | if (page_off) { | |
4c22e07f | 1378 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1379 | dump_stack(); |
1380 | return -1; | |
1381 | } | |
4c22e07f SG |
1382 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1383 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
1384 | sg_nents, &rx_desc->data[0], unsol_data_len); | |
b8d26b3b NB |
1385 | |
1386 | sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], | |
1387 | unsol_data_len); | |
1388 | ||
1389 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1390 | if (rc < 0) | |
1391 | return rc; | |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
778de368 NB |
1396 | static int |
1397 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1398 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1399 | unsigned char *buf) | |
778de368 | 1400 | { |
778de368 NB |
1401 | struct iscsi_conn *conn = isert_conn->conn; |
1402 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1403 | int rc; | |
1404 | ||
1405 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1406 | if (rc < 0) | |
1407 | return rc; | |
1408 | /* | |
1409 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1410 | */ | |
1411 | ||
1412 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1413 | } | |
1414 | ||
adb54c29 NB |
1415 | static int |
1416 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1417 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1418 | struct iscsi_text *hdr) | |
adb54c29 | 1419 | { |
adb54c29 NB |
1420 | struct iscsi_conn *conn = isert_conn->conn; |
1421 | u32 payload_length = ntoh24(hdr->dlength); | |
1422 | int rc; | |
b44a2b67 | 1423 | unsigned char *text_in = NULL; |
adb54c29 NB |
1424 | |
1425 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1426 | if (rc < 0) | |
1427 | return rc; | |
1428 | ||
b44a2b67 SG |
1429 | if (payload_length) { |
1430 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
1431 | if (!text_in) { | |
1432 | isert_err("Unable to allocate text_in of payload_length: %u\n", | |
1433 | payload_length); | |
1434 | return -ENOMEM; | |
1435 | } | |
adb54c29 NB |
1436 | } |
1437 | cmd->text_in_ptr = text_in; | |
1438 | ||
1439 | memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); | |
1440 | ||
1441 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1442 | } | |
1443 | ||
b8d26b3b NB |
1444 | static int |
1445 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1446 | uint32_t read_stag, uint64_t read_va, | |
1447 | uint32_t write_stag, uint64_t write_va) | |
1448 | { | |
1449 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
1450 | struct iscsi_conn *conn = isert_conn->conn; | |
1451 | struct iscsi_cmd *cmd; | |
1452 | struct isert_cmd *isert_cmd; | |
1453 | int ret = -EINVAL; | |
1454 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1455 | ||
fb140271 | 1456 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1457 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1458 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1459 | " ignoring\n", opcode); |
ca40d24e NB |
1460 | return 0; |
1461 | } | |
1462 | ||
b8d26b3b NB |
1463 | switch (opcode) { |
1464 | case ISCSI_OP_SCSI_CMD: | |
676687c6 | 1465 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1466 | if (!cmd) |
1467 | break; | |
1468 | ||
d703ce2f | 1469 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1470 | isert_cmd->read_stag = read_stag; |
1471 | isert_cmd->read_va = read_va; | |
1472 | isert_cmd->write_stag = write_stag; | |
1473 | isert_cmd->write_va = write_va; | |
1474 | ||
d703ce2f | 1475 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1476 | rx_desc, (unsigned char *)hdr); |
1477 | break; | |
1478 | case ISCSI_OP_NOOP_OUT: | |
676687c6 | 1479 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1480 | if (!cmd) |
1481 | break; | |
1482 | ||
d703ce2f NB |
1483 | isert_cmd = iscsit_priv_cmd(cmd); |
1484 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1485 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1486 | break; |
1487 | case ISCSI_OP_SCSI_DATA_OUT: | |
1488 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1489 | (unsigned char *)hdr); | |
1490 | break; | |
1491 | case ISCSI_OP_SCSI_TMFUNC: | |
676687c6 | 1492 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1493 | if (!cmd) |
1494 | break; | |
1495 | ||
1496 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1497 | (unsigned char *)hdr); | |
1498 | break; | |
1499 | case ISCSI_OP_LOGOUT: | |
676687c6 | 1500 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1501 | if (!cmd) |
1502 | break; | |
1503 | ||
1504 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1505 | break; |
adb54c29 | 1506 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1507 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) { |
1508 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); | |
1509 | if (!cmd) | |
1510 | break; | |
1511 | } else { | |
1512 | cmd = isert_allocate_cmd(conn); | |
1513 | if (!cmd) | |
1514 | break; | |
1515 | } | |
adb54c29 | 1516 | |
d703ce2f NB |
1517 | isert_cmd = iscsit_priv_cmd(cmd); |
1518 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1519 | rx_desc, (struct iscsi_text *)hdr); |
1520 | break; | |
b8d26b3b | 1521 | default: |
24f412dd | 1522 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1523 | dump_stack(); |
1524 | break; | |
1525 | } | |
1526 | ||
1527 | return ret; | |
1528 | } | |
1529 | ||
1530 | static void | |
1531 | isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) | |
1532 | { | |
1533 | struct iser_hdr *iser_hdr = &rx_desc->iser_header; | |
1534 | uint64_t read_va = 0, write_va = 0; | |
1535 | uint32_t read_stag = 0, write_stag = 0; | |
1536 | int rc; | |
1537 | ||
1538 | switch (iser_hdr->flags & 0xF0) { | |
1539 | case ISCSI_CTRL: | |
1540 | if (iser_hdr->flags & ISER_RSV) { | |
1541 | read_stag = be32_to_cpu(iser_hdr->read_stag); | |
1542 | read_va = be64_to_cpu(iser_hdr->read_va); | |
4c22e07f SG |
1543 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1544 | read_stag, (unsigned long long)read_va); | |
b8d26b3b NB |
1545 | } |
1546 | if (iser_hdr->flags & ISER_WSV) { | |
1547 | write_stag = be32_to_cpu(iser_hdr->write_stag); | |
1548 | write_va = be64_to_cpu(iser_hdr->write_va); | |
4c22e07f SG |
1549 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1550 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1551 | } |
1552 | ||
24f412dd | 1553 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1554 | break; |
1555 | case ISER_HELLO: | |
24f412dd | 1556 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1557 | break; |
1558 | default: | |
24f412dd | 1559 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags); |
b8d26b3b NB |
1560 | break; |
1561 | } | |
1562 | ||
1563 | rc = isert_rx_opcode(isert_conn, rx_desc, | |
1564 | read_stag, read_va, write_stag, write_va); | |
1565 | } | |
1566 | ||
1567 | static void | |
7748681b SG |
1568 | isert_rcv_completion(struct iser_rx_desc *desc, |
1569 | struct isert_conn *isert_conn, | |
1570 | u32 xfer_len) | |
b8d26b3b | 1571 | { |
dac6ab30 | 1572 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1573 | struct iscsi_hdr *hdr; |
1574 | u64 rx_dma; | |
1575 | int rx_buflen, outstanding; | |
1576 | ||
1577 | if ((char *)desc == isert_conn->login_req_buf) { | |
1578 | rx_dma = isert_conn->login_req_dma; | |
1579 | rx_buflen = ISER_RX_LOGIN_SIZE; | |
4c22e07f | 1580 | isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1581 | rx_dma, rx_buflen); |
1582 | } else { | |
1583 | rx_dma = desc->dma_addr; | |
1584 | rx_buflen = ISER_RX_PAYLOAD_SIZE; | |
4c22e07f | 1585 | isert_dbg("req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1586 | rx_dma, rx_buflen); |
1587 | } | |
1588 | ||
1589 | ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); | |
1590 | ||
1591 | hdr = &desc->iscsi_header; | |
24f412dd | 1592 | isert_dbg("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", |
b8d26b3b NB |
1593 | hdr->opcode, hdr->itt, hdr->flags, |
1594 | (int)(xfer_len - ISER_HEADERS_LEN)); | |
1595 | ||
2371e5da SG |
1596 | if ((char *)desc == isert_conn->login_req_buf) { |
1597 | isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN; | |
1598 | if (isert_conn->conn) { | |
1599 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
1600 | ||
1601 | if (login && !login->first_request) | |
1602 | isert_rx_login_req(isert_conn); | |
1603 | } | |
dac6ab30 | 1604 | mutex_lock(&isert_conn->mutex); |
2371e5da | 1605 | complete(&isert_conn->login_req_comp); |
dac6ab30 | 1606 | mutex_unlock(&isert_conn->mutex); |
2371e5da | 1607 | } else { |
b8d26b3b | 1608 | isert_rx_do_work(desc, isert_conn); |
2371e5da | 1609 | } |
b8d26b3b NB |
1610 | |
1611 | ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, | |
1612 | DMA_FROM_DEVICE); | |
1613 | ||
1614 | isert_conn->post_recv_buf_count--; | |
4c22e07f SG |
1615 | isert_dbg("Decremented post_recv_buf_count: %d\n", |
1616 | isert_conn->post_recv_buf_count); | |
b8d26b3b NB |
1617 | |
1618 | if ((char *)desc == isert_conn->login_req_buf) | |
1619 | return; | |
1620 | ||
1621 | outstanding = isert_conn->post_recv_buf_count; | |
1622 | if (outstanding + ISERT_MIN_POSTED_RX <= ISERT_QP_MAX_RECV_DTOS) { | |
1623 | int err, count = min(ISERT_QP_MAX_RECV_DTOS - outstanding, | |
1624 | ISERT_MIN_POSTED_RX); | |
1625 | err = isert_post_recv(isert_conn, count); | |
1626 | if (err) { | |
24f412dd | 1627 | isert_err("isert_post_recv() count: %d failed, %d\n", |
b8d26b3b NB |
1628 | count, err); |
1629 | } | |
1630 | } | |
1631 | } | |
1632 | ||
e3d7e4c3 SG |
1633 | static int |
1634 | isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
1635 | struct scatterlist *sg, u32 nents, u32 length, u32 offset, | |
1636 | enum iser_ib_op_code op, struct isert_data_buf *data) | |
1637 | { | |
dac6ab30 | 1638 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1639 | |
1640 | data->dma_dir = op == ISER_IB_RDMA_WRITE ? | |
1641 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
1642 | ||
1643 | data->len = length - offset; | |
1644 | data->offset = offset; | |
1645 | data->sg_off = data->offset / PAGE_SIZE; | |
1646 | ||
1647 | data->sg = &sg[data->sg_off]; | |
1648 | data->nents = min_t(unsigned int, nents - data->sg_off, | |
1649 | ISCSI_ISER_SG_TABLESIZE); | |
1650 | data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * | |
1651 | PAGE_SIZE); | |
1652 | ||
1653 | data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, | |
1654 | data->dma_dir); | |
1655 | if (unlikely(!data->dma_nents)) { | |
24f412dd | 1656 | isert_err("Cmd: unable to dma map SGs %p\n", sg); |
e3d7e4c3 SG |
1657 | return -EINVAL; |
1658 | } | |
1659 | ||
24f412dd | 1660 | isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", |
4c22e07f | 1661 | isert_cmd, data->dma_nents, data->sg, data->nents, data->len); |
e3d7e4c3 SG |
1662 | |
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | static void | |
1667 | isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) | |
1668 | { | |
dac6ab30 | 1669 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1670 | |
1671 | ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); | |
1672 | memset(data, 0, sizeof(*data)); | |
1673 | } | |
1674 | ||
1675 | ||
1676 | ||
b8d26b3b NB |
1677 | static void |
1678 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) | |
1679 | { | |
1680 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
b8d26b3b | 1681 | |
4c22e07f | 1682 | isert_dbg("Cmd %p\n", isert_cmd); |
e3d7e4c3 SG |
1683 | |
1684 | if (wr->data.sg) { | |
4c22e07f | 1685 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1686 | isert_unmap_data_buf(isert_conn, &wr->data); |
b8d26b3b NB |
1687 | } |
1688 | ||
90ecc6e2 | 1689 | if (wr->send_wr) { |
4c22e07f | 1690 | isert_dbg("Cmd %p free send_wr\n", isert_cmd); |
90ecc6e2 VP |
1691 | kfree(wr->send_wr); |
1692 | wr->send_wr = NULL; | |
1693 | } | |
b8d26b3b | 1694 | |
90ecc6e2 | 1695 | if (wr->ib_sge) { |
4c22e07f | 1696 | isert_dbg("Cmd %p free ib_sge\n", isert_cmd); |
90ecc6e2 VP |
1697 | kfree(wr->ib_sge); |
1698 | wr->ib_sge = NULL; | |
1699 | } | |
b8d26b3b NB |
1700 | } |
1701 | ||
59464ef4 | 1702 | static void |
a3a5a826 | 1703 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) |
59464ef4 VP |
1704 | { |
1705 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
59464ef4 | 1706 | |
4c22e07f | 1707 | isert_dbg("Cmd %p\n", isert_cmd); |
59464ef4 VP |
1708 | |
1709 | if (wr->fr_desc) { | |
4c22e07f | 1710 | isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd, wr->fr_desc); |
9e961ae7 SG |
1711 | if (wr->fr_desc->ind & ISERT_PROTECTED) { |
1712 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
1713 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
1714 | } | |
dac6ab30 SG |
1715 | spin_lock_bh(&isert_conn->pool_lock); |
1716 | list_add_tail(&wr->fr_desc->list, &isert_conn->fr_pool); | |
1717 | spin_unlock_bh(&isert_conn->pool_lock); | |
59464ef4 VP |
1718 | wr->fr_desc = NULL; |
1719 | } | |
1720 | ||
e3d7e4c3 | 1721 | if (wr->data.sg) { |
4c22e07f | 1722 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1723 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 VP |
1724 | } |
1725 | ||
1726 | wr->ib_sge = NULL; | |
1727 | wr->send_wr = NULL; | |
1728 | } | |
1729 | ||
b8d26b3b | 1730 | static void |
03e7848a | 1731 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1732 | { |
d703ce2f | 1733 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1734 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1735 | struct iscsi_conn *conn = isert_conn->conn; |
dac6ab30 | 1736 | struct isert_device *device = isert_conn->device; |
e4f4e801 | 1737 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1738 | |
4c22e07f | 1739 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1740 | |
1741 | switch (cmd->iscsi_opcode) { | |
1742 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1743 | spin_lock_bh(&conn->cmd_lock); |
1744 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1745 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1746 | spin_unlock_bh(&conn->cmd_lock); |
1747 | ||
03e7848a | 1748 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1749 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1750 | /* |
1751 | * Check for special case during comp_err where | |
1752 | * WRITE_PENDING has been handed off from core, | |
1753 | * but requires an extra target_put_sess_cmd() | |
1754 | * before transport_generic_free_cmd() below. | |
1755 | */ | |
1756 | if (comp_err && | |
1757 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1758 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1759 | ||
1760 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); | |
1761 | } | |
1762 | } | |
b8d26b3b | 1763 | |
d40945d8 | 1764 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
186a9647 NB |
1765 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1766 | break; | |
b8d26b3b | 1767 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1768 | spin_lock_bh(&conn->cmd_lock); |
1769 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1770 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1771 | spin_unlock_bh(&conn->cmd_lock); |
1772 | ||
b8d26b3b NB |
1773 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1774 | break; | |
1775 | case ISCSI_OP_REJECT: | |
1776 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1777 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1778 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1779 | /* If the continue bit is on, keep the command alive */ | |
1780 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1781 | break; | |
1782 | ||
b8d26b3b NB |
1783 | spin_lock_bh(&conn->cmd_lock); |
1784 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1785 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1786 | spin_unlock_bh(&conn->cmd_lock); |
1787 | ||
1788 | /* | |
1789 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1790 | * overwritten the original iscsi_opcode assignment, and the | |
1791 | * associated cmd->se_cmd needs to be released. | |
1792 | */ | |
1793 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1794 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1795 | cmd->iscsi_opcode); |
b8d26b3b NB |
1796 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1797 | break; | |
1798 | } | |
1799 | /* | |
1800 | * Fall-through | |
1801 | */ | |
1802 | default: | |
d703ce2f | 1803 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1804 | break; |
1805 | } | |
1806 | } | |
1807 | ||
1808 | static void | |
1809 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1810 | { | |
1811 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1812 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1813 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1814 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1815 | tx_desc->dma_addr = 0; | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | static void | |
1820 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1821 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1822 | { |
dbbc5d11 | 1823 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1824 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1825 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1826 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1827 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1828 | } |
1829 | ||
1830 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1831 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1832 | } |
1833 | ||
96b7973e SG |
1834 | static int |
1835 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1836 | { | |
1837 | struct ib_mr_status mr_status; | |
1838 | int ret; | |
1839 | ||
1840 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1841 | if (ret) { | |
24f412dd | 1842 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1843 | goto fail_mr_status; |
1844 | } | |
1845 | ||
1846 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1847 | u64 sec_offset_err; | |
1848 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1849 | ||
1850 | switch (mr_status.sig_err.err_type) { | |
1851 | case IB_SIG_BAD_GUARD: | |
1852 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1853 | break; | |
1854 | case IB_SIG_BAD_REFTAG: | |
1855 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1856 | break; | |
1857 | case IB_SIG_BAD_APPTAG: | |
1858 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1859 | break; | |
1860 | } | |
1861 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1862 | do_div(sec_offset_err, block_size); | |
1863 | se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; | |
1864 | ||
4c22e07f SG |
1865 | isert_err("PI error found type %d at sector 0x%llx " |
1866 | "expected 0x%x vs actual 0x%x\n", | |
1867 | mr_status.sig_err.err_type, | |
1868 | (unsigned long long)se_cmd->bad_sector, | |
1869 | mr_status.sig_err.expected, | |
1870 | mr_status.sig_err.actual); | |
96b7973e SG |
1871 | ret = 1; |
1872 | } | |
1873 | ||
1874 | fail_mr_status: | |
1875 | return ret; | |
1876 | } | |
1877 | ||
f93f3a70 SG |
1878 | static void |
1879 | isert_completion_rdma_write(struct iser_tx_desc *tx_desc, | |
1880 | struct isert_cmd *isert_cmd) | |
1881 | { | |
9e961ae7 | 1882 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
f93f3a70 | 1883 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
9e961ae7 | 1884 | struct se_cmd *se_cmd = &cmd->se_cmd; |
f93f3a70 | 1885 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1886 | struct isert_device *device = isert_conn->device; |
9e961ae7 SG |
1887 | int ret = 0; |
1888 | ||
1889 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { | |
96b7973e SG |
1890 | ret = isert_check_pi_status(se_cmd, |
1891 | wr->fr_desc->pi_ctx->sig_mr); | |
1892 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 | 1893 | } |
f93f3a70 SG |
1894 | |
1895 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
897bb2c9 | 1896 | wr->send_wr_num = 0; |
9e961ae7 SG |
1897 | if (ret) |
1898 | transport_send_check_condition_and_sense(se_cmd, | |
1899 | se_cmd->pi_err, 0); | |
1900 | else | |
1901 | isert_put_response(isert_conn->conn, cmd); | |
f93f3a70 SG |
1902 | } |
1903 | ||
b8d26b3b NB |
1904 | static void |
1905 | isert_completion_rdma_read(struct iser_tx_desc *tx_desc, | |
1906 | struct isert_cmd *isert_cmd) | |
1907 | { | |
1908 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
d703ce2f | 1909 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1910 | struct se_cmd *se_cmd = &cmd->se_cmd; |
90ecc6e2 | 1911 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1912 | struct isert_device *device = isert_conn->device; |
5bac4b1a | 1913 | int ret = 0; |
b8d26b3b | 1914 | |
9e961ae7 | 1915 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { |
96b7973e SG |
1916 | ret = isert_check_pi_status(se_cmd, |
1917 | wr->fr_desc->pi_ctx->sig_mr); | |
1918 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 SG |
1919 | } |
1920 | ||
b8d26b3b | 1921 | iscsit_stop_dataout_timer(cmd); |
d40945d8 | 1922 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
e3d7e4c3 | 1923 | cmd->write_data_done = wr->data.len; |
b6b87a1d | 1924 | wr->send_wr_num = 0; |
b8d26b3b | 1925 | |
24f412dd | 1926 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1927 | spin_lock_bh(&cmd->istate_lock); |
1928 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1929 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1930 | spin_unlock_bh(&cmd->istate_lock); | |
1931 | ||
364189f0 SG |
1932 | if (ret) { |
1933 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); | |
5bac4b1a SG |
1934 | transport_send_check_condition_and_sense(se_cmd, |
1935 | se_cmd->pi_err, 0); | |
364189f0 | 1936 | } else { |
5bac4b1a | 1937 | target_execute_cmd(se_cmd); |
364189f0 | 1938 | } |
b8d26b3b NB |
1939 | } |
1940 | ||
1941 | static void | |
1942 | isert_do_control_comp(struct work_struct *work) | |
1943 | { | |
1944 | struct isert_cmd *isert_cmd = container_of(work, | |
1945 | struct isert_cmd, comp_work); | |
1946 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1947 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
d703ce2f | 1948 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1949 | |
4c22e07f SG |
1950 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1951 | ||
b8d26b3b NB |
1952 | switch (cmd->i_state) { |
1953 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1954 | iscsit_tmr_post_handler(cmd, cmd->conn); |
10633c37 SG |
1955 | case ISTATE_SEND_REJECT: /* FALLTHRU */ |
1956 | case ISTATE_SEND_TEXTRSP: /* FALLTHRU */ | |
b8d26b3b | 1957 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1958 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1959 | ib_dev, false); | |
3df8f68a | 1960 | break; |
b8d26b3b | 1961 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1962 | iscsit_logout_post_handler(cmd, cmd->conn); |
1963 | break; | |
1964 | default: | |
4c22e07f | 1965 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1966 | dump_stack(); |
1967 | break; | |
1968 | } | |
1969 | } | |
1970 | ||
1971 | static void | |
1972 | isert_response_completion(struct iser_tx_desc *tx_desc, | |
1973 | struct isert_cmd *isert_cmd, | |
1974 | struct isert_conn *isert_conn, | |
1975 | struct ib_device *ib_dev) | |
1976 | { | |
d703ce2f | 1977 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b NB |
1978 | |
1979 | if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || | |
3df8f68a | 1980 | cmd->i_state == ISTATE_SEND_LOGOUTRSP || |
adb54c29 NB |
1981 | cmd->i_state == ISTATE_SEND_REJECT || |
1982 | cmd->i_state == ISTATE_SEND_TEXTRSP) { | |
b8d26b3b NB |
1983 | isert_unmap_tx_desc(tx_desc, ib_dev); |
1984 | ||
1985 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1986 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1987 | return; | |
1988 | } | |
897bb2c9 | 1989 | |
b8d26b3b | 1990 | cmd->i_state = ISTATE_SENT_STATUS; |
03e7848a | 1991 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); |
b8d26b3b NB |
1992 | } |
1993 | ||
1994 | static void | |
7748681b | 1995 | isert_snd_completion(struct iser_tx_desc *tx_desc, |
68a86dee | 1996 | struct isert_conn *isert_conn) |
b8d26b3b | 1997 | { |
dac6ab30 | 1998 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1999 | struct isert_cmd *isert_cmd = tx_desc->isert_cmd; |
2000 | struct isert_rdma_wr *wr; | |
2001 | ||
2002 | if (!isert_cmd) { | |
b8d26b3b NB |
2003 | isert_unmap_tx_desc(tx_desc, ib_dev); |
2004 | return; | |
2005 | } | |
2006 | wr = &isert_cmd->rdma_wr; | |
2007 | ||
4c22e07f SG |
2008 | isert_dbg("Cmd %p iser_ib_op %d\n", isert_cmd, wr->iser_ib_op); |
2009 | ||
b8d26b3b | 2010 | switch (wr->iser_ib_op) { |
b8d26b3b | 2011 | case ISER_IB_SEND: |
b8d26b3b NB |
2012 | isert_response_completion(tx_desc, isert_cmd, |
2013 | isert_conn, ib_dev); | |
2014 | break; | |
2015 | case ISER_IB_RDMA_WRITE: | |
f93f3a70 | 2016 | isert_completion_rdma_write(tx_desc, isert_cmd); |
b8d26b3b NB |
2017 | break; |
2018 | case ISER_IB_RDMA_READ: | |
b8d26b3b NB |
2019 | isert_completion_rdma_read(tx_desc, isert_cmd); |
2020 | break; | |
2021 | default: | |
4c22e07f | 2022 | isert_err("Unknown wr->iser_ib_op: 0x%x\n", wr->iser_ib_op); |
b8d26b3b NB |
2023 | dump_stack(); |
2024 | break; | |
2025 | } | |
2026 | } | |
2027 | ||
6f0fae3d SG |
2028 | /** |
2029 | * is_isert_tx_desc() - Indicate if the completion wr_id | |
2030 | * is a TX descriptor or not. | |
2031 | * @isert_conn: iser connection | |
2032 | * @wr_id: completion WR identifier | |
2033 | * | |
2034 | * Since we cannot rely on wc opcode in FLUSH errors | |
2035 | * we must work around it by checking if the wr_id address | |
2036 | * falls in the iser connection rx_descs buffer. If so | |
2037 | * it is an RX descriptor, otherwize it is a TX. | |
2038 | */ | |
2039 | static inline bool | |
2040 | is_isert_tx_desc(struct isert_conn *isert_conn, void *wr_id) | |
2041 | { | |
dac6ab30 SG |
2042 | void *start = isert_conn->rx_descs; |
2043 | int len = ISERT_QP_MAX_RECV_DTOS * sizeof(*isert_conn->rx_descs); | |
6f0fae3d SG |
2044 | |
2045 | if (wr_id >= start && wr_id < start + len) | |
2046 | return false; | |
2047 | ||
2048 | return true; | |
2049 | } | |
2050 | ||
b8d26b3b | 2051 | static void |
6f0fae3d | 2052 | isert_cq_comp_err(struct isert_conn *isert_conn, struct ib_wc *wc) |
b8d26b3b | 2053 | { |
bdf20e72 | 2054 | if (wc->wr_id == ISER_BEACON_WRID) { |
dac6ab30 | 2055 | isert_info("conn %p completing wait_comp_err\n", |
bdf20e72 | 2056 | isert_conn); |
dac6ab30 | 2057 | complete(&isert_conn->wait_comp_err); |
ed4520ae | 2058 | } else if (is_isert_tx_desc(isert_conn, (void *)(uintptr_t)wc->wr_id)) { |
dac6ab30 | 2059 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
df43debd | 2060 | struct isert_cmd *isert_cmd; |
6f0fae3d | 2061 | struct iser_tx_desc *desc; |
df43debd | 2062 | |
6f0fae3d SG |
2063 | desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
2064 | isert_cmd = desc->isert_cmd; | |
df43debd SG |
2065 | if (!isert_cmd) |
2066 | isert_unmap_tx_desc(desc, ib_dev); | |
2067 | else | |
2068 | isert_completion_put(desc, isert_cmd, ib_dev, true); | |
df43debd SG |
2069 | } else { |
2070 | isert_conn->post_recv_buf_count--; | |
bdf20e72 SG |
2071 | if (!isert_conn->post_recv_buf_count) |
2072 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
df43debd | 2073 | } |
b8d26b3b NB |
2074 | } |
2075 | ||
2076 | static void | |
6f0fae3d | 2077 | isert_handle_wc(struct ib_wc *wc) |
b8d26b3b | 2078 | { |
b8d26b3b NB |
2079 | struct isert_conn *isert_conn; |
2080 | struct iser_tx_desc *tx_desc; | |
6f0fae3d | 2081 | struct iser_rx_desc *rx_desc; |
b8d26b3b | 2082 | |
6f0fae3d SG |
2083 | isert_conn = wc->qp->qp_context; |
2084 | if (likely(wc->status == IB_WC_SUCCESS)) { | |
2085 | if (wc->opcode == IB_WC_RECV) { | |
2086 | rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id; | |
7748681b | 2087 | isert_rcv_completion(rx_desc, isert_conn, wc->byte_len); |
b8d26b3b | 2088 | } else { |
6f0fae3d | 2089 | tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
7748681b | 2090 | isert_snd_completion(tx_desc, isert_conn); |
b8d26b3b | 2091 | } |
6f0fae3d SG |
2092 | } else { |
2093 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
24f412dd | 2094 | isert_err("wr id %llx status %d vend_err %x\n", |
6f0fae3d SG |
2095 | wc->wr_id, wc->status, wc->vendor_err); |
2096 | else | |
24f412dd | 2097 | isert_dbg("flush error: wr id %llx\n", wc->wr_id); |
b8d26b3b | 2098 | |
6f0fae3d SG |
2099 | if (wc->wr_id != ISER_FASTREG_LI_WRID) |
2100 | isert_cq_comp_err(isert_conn, wc); | |
2101 | } | |
b8d26b3b NB |
2102 | } |
2103 | ||
2104 | static void | |
6f0fae3d | 2105 | isert_cq_work(struct work_struct *work) |
b8d26b3b | 2106 | { |
37d9fe80 | 2107 | enum { isert_poll_budget = 65536 }; |
4a295bae | 2108 | struct isert_comp *comp = container_of(work, struct isert_comp, |
6f0fae3d | 2109 | work); |
36ea63b5 SG |
2110 | struct ib_wc *const wcs = comp->wcs; |
2111 | int i, n, completed = 0; | |
b8d26b3b | 2112 | |
36ea63b5 SG |
2113 | while ((n = ib_poll_cq(comp->cq, ARRAY_SIZE(comp->wcs), wcs)) > 0) { |
2114 | for (i = 0; i < n; i++) | |
2115 | isert_handle_wc(&wcs[i]); | |
b8d26b3b | 2116 | |
36ea63b5 SG |
2117 | completed += n; |
2118 | if (completed >= isert_poll_budget) | |
37d9fe80 SG |
2119 | break; |
2120 | } | |
2121 | ||
6f0fae3d | 2122 | ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
b8d26b3b NB |
2123 | } |
2124 | ||
2125 | static void | |
6f0fae3d | 2126 | isert_cq_callback(struct ib_cq *cq, void *context) |
b8d26b3b | 2127 | { |
4a295bae | 2128 | struct isert_comp *comp = context; |
b8d26b3b | 2129 | |
6f0fae3d | 2130 | queue_work(isert_comp_wq, &comp->work); |
b8d26b3b NB |
2131 | } |
2132 | ||
2133 | static int | |
2134 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
2135 | { | |
2136 | struct ib_send_wr *wr_failed; | |
2137 | int ret; | |
2138 | ||
dac6ab30 | 2139 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, |
b8d26b3b NB |
2140 | &wr_failed); |
2141 | if (ret) { | |
24f412dd | 2142 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
2143 | return ret; |
2144 | } | |
2145 | return ret; | |
2146 | } | |
2147 | ||
2148 | static int | |
2149 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2150 | { | |
d703ce2f | 2151 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2152 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2153 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2154 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
2155 | &isert_cmd->tx_desc.iscsi_header; | |
2156 | ||
2157 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2158 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
2159 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2160 | /* | |
2161 | * Attach SENSE DATA payload to iSCSI Response PDU | |
2162 | */ | |
2163 | if (cmd->se_cmd.sense_buffer && | |
2164 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
2165 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 2166 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2167 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 2168 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 2169 | u32 padding, pdu_len; |
b8d26b3b NB |
2170 | |
2171 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
2172 | cmd->sense_buffer); | |
2173 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
2174 | ||
2175 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
2176 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 2177 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 2178 | |
dbbc5d11 NB |
2179 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
2180 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b NB |
2181 | DMA_TO_DEVICE); |
2182 | ||
dbbc5d11 NB |
2183 | isert_cmd->pdu_buf_len = pdu_len; |
2184 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2185 | tx_dsg->length = pdu_len; | |
67cb3949 | 2186 | tx_dsg->lkey = device->mr->lkey; |
b8d26b3b NB |
2187 | isert_cmd->tx_desc.num_sge = 2; |
2188 | } | |
2189 | ||
68a86dee | 2190 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2191 | |
4c22e07f | 2192 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
2193 | |
2194 | return isert_post_response(isert_conn, isert_cmd); | |
2195 | } | |
2196 | ||
131e6abc NB |
2197 | static void |
2198 | isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2199 | { | |
2200 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 2201 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2202 | struct isert_device *device = isert_conn->device; |
131e6abc NB |
2203 | |
2204 | spin_lock_bh(&conn->cmd_lock); | |
2205 | if (!list_empty(&cmd->i_conn_node)) | |
2206 | list_del_init(&cmd->i_conn_node); | |
2207 | spin_unlock_bh(&conn->cmd_lock); | |
2208 | ||
2209 | if (cmd->data_direction == DMA_TO_DEVICE) | |
2210 | iscsit_stop_dataout_timer(cmd); | |
2211 | ||
2212 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
2213 | } | |
2214 | ||
e70beee7 NB |
2215 | static enum target_prot_op |
2216 | isert_get_sup_prot_ops(struct iscsi_conn *conn) | |
2217 | { | |
6700425e | 2218 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2219 | struct isert_device *device = isert_conn->device; |
e70beee7 | 2220 | |
23a548ee SG |
2221 | if (conn->tpg->tpg_attrib.t10_pi) { |
2222 | if (device->pi_capable) { | |
24f412dd | 2223 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
2224 | isert_conn->pi_support = true; |
2225 | return TARGET_PROT_ALL; | |
2226 | } | |
2227 | } | |
2228 | ||
24f412dd | 2229 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 2230 | isert_conn->pi_support = false; |
e70beee7 NB |
2231 | |
2232 | return TARGET_PROT_NORMAL; | |
2233 | } | |
2234 | ||
b8d26b3b NB |
2235 | static int |
2236 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2237 | bool nopout_response) | |
2238 | { | |
d703ce2f | 2239 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2240 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2241 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2242 | ||
2243 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2244 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
2245 | &isert_cmd->tx_desc.iscsi_header, | |
2246 | nopout_response); | |
2247 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2248 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2249 | |
4c22e07f | 2250 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
2251 | |
2252 | return isert_post_response(isert_conn, isert_cmd); | |
2253 | } | |
2254 | ||
2255 | static int | |
2256 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2257 | { | |
d703ce2f | 2258 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2259 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2260 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2261 | ||
2262 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2263 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
2264 | &isert_cmd->tx_desc.iscsi_header); | |
2265 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2266 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2267 | |
4c22e07f | 2268 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
2269 | |
2270 | return isert_post_response(isert_conn, isert_cmd); | |
2271 | } | |
2272 | ||
2273 | static int | |
2274 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2275 | { | |
d703ce2f | 2276 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2277 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2278 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2279 | ||
2280 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2281 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
2282 | &isert_cmd->tx_desc.iscsi_header); | |
2283 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2284 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2285 | |
4c22e07f | 2286 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
2287 | |
2288 | return isert_post_response(isert_conn, isert_cmd); | |
2289 | } | |
2290 | ||
2291 | static int | |
2292 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2293 | { | |
d703ce2f | 2294 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2295 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 2296 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 2297 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2298 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
2299 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2300 | struct iscsi_reject *hdr = | |
2301 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
2302 | |
2303 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 2304 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 2305 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
2306 | |
2307 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 2308 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
2309 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
2310 | DMA_TO_DEVICE); | |
dbbc5d11 NB |
2311 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
2312 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 2313 | tx_dsg->length = ISCSI_HDR_LEN; |
67cb3949 | 2314 | tx_dsg->lkey = device->mr->lkey; |
3df8f68a NB |
2315 | isert_cmd->tx_desc.num_sge = 2; |
2316 | ||
68a86dee | 2317 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2318 | |
4c22e07f | 2319 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
2320 | |
2321 | return isert_post_response(isert_conn, isert_cmd); | |
2322 | } | |
2323 | ||
adb54c29 NB |
2324 | static int |
2325 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2326 | { | |
d703ce2f | 2327 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2328 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
2329 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2330 | struct iscsi_text_rsp *hdr = | |
2331 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
2332 | u32 txt_rsp_len; | |
2333 | int rc; | |
2334 | ||
2335 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 2336 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
2337 | if (rc < 0) |
2338 | return rc; | |
2339 | ||
2340 | txt_rsp_len = rc; | |
2341 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2342 | ||
2343 | if (txt_rsp_len) { | |
dac6ab30 | 2344 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2345 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
2346 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2347 | void *txt_rsp_buf = cmd->buf_ptr; | |
2348 | ||
2349 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
2350 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
2351 | ||
2352 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
2353 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2354 | tx_dsg->length = txt_rsp_len; | |
67cb3949 | 2355 | tx_dsg->lkey = device->mr->lkey; |
adb54c29 NB |
2356 | isert_cmd->tx_desc.num_sge = 2; |
2357 | } | |
68a86dee | 2358 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 2359 | |
f64d2792 | 2360 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
2361 | |
2362 | return isert_post_response(isert_conn, isert_cmd); | |
2363 | } | |
2364 | ||
b8d26b3b NB |
2365 | static int |
2366 | isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
2367 | struct ib_sge *ib_sge, struct ib_send_wr *send_wr, | |
2368 | u32 data_left, u32 offset) | |
2369 | { | |
d703ce2f | 2370 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 2371 | struct scatterlist *sg_start, *tmp_sg; |
dac6ab30 | 2372 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2373 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
2374 | u32 sg_off, page_off; |
2375 | int i = 0, sg_nents; | |
2376 | ||
2377 | sg_off = offset / PAGE_SIZE; | |
2378 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
2379 | sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); | |
2380 | page_off = offset % PAGE_SIZE; | |
2381 | ||
2382 | send_wr->sg_list = ib_sge; | |
2383 | send_wr->num_sge = sg_nents; | |
b0a191e7 | 2384 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
b8d26b3b NB |
2385 | /* |
2386 | * Perform mapping of TCM scatterlist memory ib_sge dma_addr. | |
2387 | */ | |
2388 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
4c22e07f SG |
2389 | isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, " |
2390 | "page_off: %u\n", | |
2391 | (unsigned long long)tmp_sg->dma_address, | |
2392 | tmp_sg->length, page_off); | |
b8d26b3b NB |
2393 | |
2394 | ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; | |
2395 | ib_sge->length = min_t(u32, data_left, | |
2396 | ib_sg_dma_len(ib_dev, tmp_sg) - page_off); | |
67cb3949 | 2397 | ib_sge->lkey = device->mr->lkey; |
b8d26b3b | 2398 | |
4c22e07f SG |
2399 | isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n", |
2400 | ib_sge->addr, ib_sge->length, ib_sge->lkey); | |
b8d26b3b NB |
2401 | page_off = 0; |
2402 | data_left -= ib_sge->length; | |
2403 | ib_sge++; | |
24f412dd | 2404 | isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge); |
b8d26b3b NB |
2405 | } |
2406 | ||
24f412dd | 2407 | isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", |
4c22e07f | 2408 | send_wr->sg_list, send_wr->num_sge); |
b8d26b3b NB |
2409 | |
2410 | return sg_nents; | |
2411 | } | |
2412 | ||
2413 | static int | |
90ecc6e2 VP |
2414 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2415 | struct isert_rdma_wr *wr) | |
b8d26b3b NB |
2416 | { |
2417 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2418 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2419 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2420 | struct isert_data_buf *data = &wr->data; |
90ecc6e2 | 2421 | struct ib_send_wr *send_wr; |
b8d26b3b | 2422 | struct ib_sge *ib_sge; |
e3d7e4c3 SG |
2423 | u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; |
2424 | int ret = 0, i, ib_sge_cnt; | |
90ecc6e2 | 2425 | |
e3d7e4c3 | 2426 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
b8d26b3b | 2427 | |
e3d7e4c3 SG |
2428 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2429 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2430 | se_cmd->t_data_nents, se_cmd->data_length, | |
2431 | offset, wr->iser_ib_op, &wr->data); | |
2432 | if (ret) | |
2433 | return ret; | |
b8d26b3b | 2434 | |
e3d7e4c3 SG |
2435 | data_left = data->len; |
2436 | offset = data->offset; | |
b8d26b3b | 2437 | |
e3d7e4c3 | 2438 | ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); |
b8d26b3b | 2439 | if (!ib_sge) { |
24f412dd | 2440 | isert_warn("Unable to allocate ib_sge\n"); |
b8d26b3b | 2441 | ret = -ENOMEM; |
e3d7e4c3 | 2442 | goto unmap_cmd; |
b8d26b3b | 2443 | } |
90ecc6e2 | 2444 | wr->ib_sge = ib_sge; |
b8d26b3b | 2445 | |
e3d7e4c3 | 2446 | wr->send_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); |
b8d26b3b NB |
2447 | wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num, |
2448 | GFP_KERNEL); | |
2449 | if (!wr->send_wr) { | |
24f412dd | 2450 | isert_dbg("Unable to allocate wr->send_wr\n"); |
b8d26b3b | 2451 | ret = -ENOMEM; |
e3d7e4c3 | 2452 | goto unmap_cmd; |
b8d26b3b | 2453 | } |
b8d26b3b NB |
2454 | |
2455 | wr->isert_cmd = isert_cmd; | |
2456 | rdma_write_max = isert_conn->max_sge * PAGE_SIZE; | |
b8d26b3b NB |
2457 | |
2458 | for (i = 0; i < wr->send_wr_num; i++) { | |
2459 | send_wr = &isert_cmd->rdma_wr.send_wr[i]; | |
2460 | data_len = min(data_left, rdma_write_max); | |
2461 | ||
b8d26b3b | 2462 | send_wr->send_flags = 0; |
90ecc6e2 VP |
2463 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
2464 | send_wr->opcode = IB_WR_RDMA_WRITE; | |
2465 | send_wr->wr.rdma.remote_addr = isert_cmd->read_va + offset; | |
2466 | send_wr->wr.rdma.rkey = isert_cmd->read_stag; | |
2467 | if (i + 1 == wr->send_wr_num) | |
2468 | send_wr->next = &isert_cmd->tx_desc.send_wr; | |
2469 | else | |
2470 | send_wr->next = &wr->send_wr[i + 1]; | |
2471 | } else { | |
2472 | send_wr->opcode = IB_WR_RDMA_READ; | |
2473 | send_wr->wr.rdma.remote_addr = isert_cmd->write_va + va_offset; | |
2474 | send_wr->wr.rdma.rkey = isert_cmd->write_stag; | |
2475 | if (i + 1 == wr->send_wr_num) | |
2476 | send_wr->send_flags = IB_SEND_SIGNALED; | |
2477 | else | |
2478 | send_wr->next = &wr->send_wr[i + 1]; | |
2479 | } | |
b8d26b3b NB |
2480 | |
2481 | ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, | |
2482 | send_wr, data_len, offset); | |
2483 | ib_sge += ib_sge_cnt; | |
2484 | ||
b8d26b3b | 2485 | offset += data_len; |
90ecc6e2 | 2486 | va_offset += data_len; |
b8d26b3b NB |
2487 | data_left -= data_len; |
2488 | } | |
90ecc6e2 VP |
2489 | |
2490 | return 0; | |
e3d7e4c3 SG |
2491 | unmap_cmd: |
2492 | isert_unmap_data_buf(isert_conn, data); | |
2493 | ||
90ecc6e2 VP |
2494 | return ret; |
2495 | } | |
2496 | ||
59464ef4 VP |
2497 | static int |
2498 | isert_map_fr_pagelist(struct ib_device *ib_dev, | |
2499 | struct scatterlist *sg_start, int sg_nents, u64 *fr_pl) | |
2500 | { | |
2501 | u64 start_addr, end_addr, page, chunk_start = 0; | |
2502 | struct scatterlist *tmp_sg; | |
2503 | int i = 0, new_chunk, last_ent, n_pages; | |
2504 | ||
2505 | n_pages = 0; | |
2506 | new_chunk = 1; | |
2507 | last_ent = sg_nents - 1; | |
2508 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
2509 | start_addr = ib_sg_dma_address(ib_dev, tmp_sg); | |
2510 | if (new_chunk) | |
2511 | chunk_start = start_addr; | |
2512 | end_addr = start_addr + ib_sg_dma_len(ib_dev, tmp_sg); | |
2513 | ||
4c22e07f SG |
2514 | isert_dbg("SGL[%d] dma_addr: 0x%llx len: %u\n", |
2515 | i, (unsigned long long)tmp_sg->dma_address, | |
2516 | tmp_sg->length); | |
59464ef4 VP |
2517 | |
2518 | if ((end_addr & ~PAGE_MASK) && i < last_ent) { | |
2519 | new_chunk = 0; | |
2520 | continue; | |
2521 | } | |
2522 | new_chunk = 1; | |
2523 | ||
2524 | page = chunk_start & PAGE_MASK; | |
2525 | do { | |
2526 | fr_pl[n_pages++] = page; | |
4c22e07f SG |
2527 | isert_dbg("Mapped page_list[%d] page_addr: 0x%llx\n", |
2528 | n_pages - 1, page); | |
59464ef4 VP |
2529 | page += PAGE_SIZE; |
2530 | } while (page < end_addr); | |
2531 | } | |
2532 | ||
2533 | return n_pages; | |
2534 | } | |
2535 | ||
10633c37 SG |
2536 | static inline void |
2537 | isert_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr) | |
2538 | { | |
2539 | u32 rkey; | |
2540 | ||
2541 | memset(inv_wr, 0, sizeof(*inv_wr)); | |
2542 | inv_wr->wr_id = ISER_FASTREG_LI_WRID; | |
2543 | inv_wr->opcode = IB_WR_LOCAL_INV; | |
2544 | inv_wr->ex.invalidate_rkey = mr->rkey; | |
2545 | ||
2546 | /* Bump the key */ | |
2547 | rkey = ib_inc_rkey(mr->rkey); | |
2548 | ib_update_fast_reg_key(mr, rkey); | |
2549 | } | |
2550 | ||
59464ef4 | 2551 | static int |
e3d7e4c3 SG |
2552 | isert_fast_reg_mr(struct isert_conn *isert_conn, |
2553 | struct fast_reg_descriptor *fr_desc, | |
2554 | struct isert_data_buf *mem, | |
9e961ae7 | 2555 | enum isert_indicator ind, |
e3d7e4c3 | 2556 | struct ib_sge *sge) |
59464ef4 | 2557 | { |
dac6ab30 | 2558 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2559 | struct ib_device *ib_dev = device->ib_device; |
9e961ae7 SG |
2560 | struct ib_mr *mr; |
2561 | struct ib_fast_reg_page_list *frpl; | |
59464ef4 VP |
2562 | struct ib_send_wr fr_wr, inv_wr; |
2563 | struct ib_send_wr *bad_wr, *wr = NULL; | |
9bd626e7 SG |
2564 | int ret, pagelist_len; |
2565 | u32 page_off; | |
59464ef4 | 2566 | |
e3d7e4c3 | 2567 | if (mem->dma_nents == 1) { |
67cb3949 | 2568 | sge->lkey = device->mr->lkey; |
e3d7e4c3 SG |
2569 | sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); |
2570 | sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); | |
4c22e07f SG |
2571 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2572 | sge->addr, sge->length, sge->lkey); | |
e3d7e4c3 SG |
2573 | return 0; |
2574 | } | |
2575 | ||
9e961ae7 SG |
2576 | if (ind == ISERT_DATA_KEY_VALID) { |
2577 | /* Registering data buffer */ | |
2578 | mr = fr_desc->data_mr; | |
2579 | frpl = fr_desc->data_frpl; | |
2580 | } else { | |
2581 | /* Registering protection buffer */ | |
2582 | mr = fr_desc->pi_ctx->prot_mr; | |
2583 | frpl = fr_desc->pi_ctx->prot_frpl; | |
2584 | } | |
2585 | ||
e3d7e4c3 | 2586 | page_off = mem->offset % PAGE_SIZE; |
59464ef4 | 2587 | |
24f412dd | 2588 | isert_dbg("Use fr_desc %p sg_nents %d offset %u\n", |
4c22e07f | 2589 | fr_desc, mem->nents, mem->offset); |
59464ef4 | 2590 | |
e3d7e4c3 | 2591 | pagelist_len = isert_map_fr_pagelist(ib_dev, mem->sg, mem->nents, |
9e961ae7 | 2592 | &frpl->page_list[0]); |
59464ef4 | 2593 | |
10633c37 SG |
2594 | if (!(fr_desc->ind & ind)) { |
2595 | isert_inv_rkey(&inv_wr, mr); | |
59464ef4 | 2596 | wr = &inv_wr; |
59464ef4 VP |
2597 | } |
2598 | ||
2599 | /* Prepare FASTREG WR */ | |
2600 | memset(&fr_wr, 0, sizeof(fr_wr)); | |
9bb4ca68 | 2601 | fr_wr.wr_id = ISER_FASTREG_LI_WRID; |
59464ef4 | 2602 | fr_wr.opcode = IB_WR_FAST_REG_MR; |
9e961ae7 SG |
2603 | fr_wr.wr.fast_reg.iova_start = frpl->page_list[0] + page_off; |
2604 | fr_wr.wr.fast_reg.page_list = frpl; | |
59464ef4 VP |
2605 | fr_wr.wr.fast_reg.page_list_len = pagelist_len; |
2606 | fr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; | |
e3d7e4c3 | 2607 | fr_wr.wr.fast_reg.length = mem->len; |
9e961ae7 | 2608 | fr_wr.wr.fast_reg.rkey = mr->rkey; |
59464ef4 VP |
2609 | fr_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE; |
2610 | ||
2611 | if (!wr) | |
2612 | wr = &fr_wr; | |
2613 | else | |
2614 | wr->next = &fr_wr; | |
2615 | ||
dac6ab30 | 2616 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
59464ef4 | 2617 | if (ret) { |
24f412dd | 2618 | isert_err("fast registration failed, ret:%d\n", ret); |
59464ef4 VP |
2619 | return ret; |
2620 | } | |
9e961ae7 | 2621 | fr_desc->ind &= ~ind; |
59464ef4 | 2622 | |
9e961ae7 SG |
2623 | sge->lkey = mr->lkey; |
2624 | sge->addr = frpl->page_list[0] + page_off; | |
e3d7e4c3 | 2625 | sge->length = mem->len; |
59464ef4 | 2626 | |
4c22e07f SG |
2627 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2628 | sge->addr, sge->length, sge->lkey); | |
9e961ae7 SG |
2629 | |
2630 | return ret; | |
2631 | } | |
2632 | ||
3d73cf1a SG |
2633 | static inline void |
2634 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, | |
2635 | struct ib_sig_domain *domain) | |
2636 | { | |
78eda2bb | 2637 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
2638 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
2639 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
2640 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
2641 | /* |
2642 | * At the moment we hard code those, but if in the future | |
2643 | * the target core would like to use it, we will take it | |
2644 | * from se_cmd. | |
2645 | */ | |
2646 | domain->sig.dif.apptag_check_mask = 0xffff; | |
2647 | domain->sig.dif.app_escape = true; | |
2648 | domain->sig.dif.ref_escape = true; | |
2649 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
2650 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
2651 | domain->sig.dif.ref_remap = true; | |
3d73cf1a SG |
2652 | }; |
2653 | ||
9e961ae7 SG |
2654 | static int |
2655 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2656 | { | |
9e961ae7 SG |
2657 | switch (se_cmd->prot_op) { |
2658 | case TARGET_PROT_DIN_INSERT: | |
2659 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2660 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2661 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
9e961ae7 SG |
2662 | break; |
2663 | case TARGET_PROT_DOUT_INSERT: | |
2664 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2665 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2666 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); |
9e961ae7 SG |
2667 | break; |
2668 | case TARGET_PROT_DIN_PASS: | |
2669 | case TARGET_PROT_DOUT_PASS: | |
3d73cf1a SG |
2670 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
2671 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); | |
9e961ae7 SG |
2672 | break; |
2673 | default: | |
24f412dd | 2674 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2675 | return -EINVAL; |
2676 | } | |
2677 | ||
2678 | return 0; | |
2679 | } | |
2680 | ||
2681 | static inline u8 | |
2682 | isert_set_prot_checks(u8 prot_checks) | |
2683 | { | |
2684 | return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | | |
2685 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | | |
2686 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); | |
2687 | } | |
2688 | ||
2689 | static int | |
570db170 SG |
2690 | isert_reg_sig_mr(struct isert_conn *isert_conn, |
2691 | struct se_cmd *se_cmd, | |
2692 | struct isert_rdma_wr *rdma_wr, | |
2693 | struct fast_reg_descriptor *fr_desc) | |
9e961ae7 SG |
2694 | { |
2695 | struct ib_send_wr sig_wr, inv_wr; | |
2696 | struct ib_send_wr *bad_wr, *wr = NULL; | |
2697 | struct pi_context *pi_ctx = fr_desc->pi_ctx; | |
2698 | struct ib_sig_attrs sig_attrs; | |
2699 | int ret; | |
9e961ae7 SG |
2700 | |
2701 | memset(&sig_attrs, 0, sizeof(sig_attrs)); | |
2702 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); | |
2703 | if (ret) | |
2704 | goto err; | |
59464ef4 | 2705 | |
9e961ae7 SG |
2706 | sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); |
2707 | ||
2708 | if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { | |
10633c37 | 2709 | isert_inv_rkey(&inv_wr, pi_ctx->sig_mr); |
9e961ae7 | 2710 | wr = &inv_wr; |
9e961ae7 SG |
2711 | } |
2712 | ||
2713 | memset(&sig_wr, 0, sizeof(sig_wr)); | |
2714 | sig_wr.opcode = IB_WR_REG_SIG_MR; | |
c2caa207 | 2715 | sig_wr.wr_id = ISER_FASTREG_LI_WRID; |
570db170 | 2716 | sig_wr.sg_list = &rdma_wr->ib_sg[DATA]; |
9e961ae7 SG |
2717 | sig_wr.num_sge = 1; |
2718 | sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE; | |
2719 | sig_wr.wr.sig_handover.sig_attrs = &sig_attrs; | |
2720 | sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr; | |
2721 | if (se_cmd->t_prot_sg) | |
570db170 | 2722 | sig_wr.wr.sig_handover.prot = &rdma_wr->ib_sg[PROT]; |
9e961ae7 SG |
2723 | |
2724 | if (!wr) | |
2725 | wr = &sig_wr; | |
2726 | else | |
2727 | wr->next = &sig_wr; | |
2728 | ||
dac6ab30 | 2729 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
9e961ae7 | 2730 | if (ret) { |
24f412dd | 2731 | isert_err("fast registration failed, ret:%d\n", ret); |
9e961ae7 SG |
2732 | goto err; |
2733 | } | |
2734 | fr_desc->ind &= ~ISERT_SIG_KEY_VALID; | |
2735 | ||
570db170 SG |
2736 | rdma_wr->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey; |
2737 | rdma_wr->ib_sg[SIG].addr = 0; | |
2738 | rdma_wr->ib_sg[SIG].length = se_cmd->data_length; | |
9e961ae7 SG |
2739 | if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && |
2740 | se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) | |
2741 | /* | |
2742 | * We have protection guards on the wire | |
2743 | * so we need to set a larget transfer | |
2744 | */ | |
570db170 | 2745 | rdma_wr->ib_sg[SIG].length += se_cmd->prot_length; |
9e961ae7 | 2746 | |
24f412dd | 2747 | isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n", |
570db170 SG |
2748 | rdma_wr->ib_sg[SIG].addr, rdma_wr->ib_sg[SIG].length, |
2749 | rdma_wr->ib_sg[SIG].lkey); | |
9e961ae7 | 2750 | err: |
59464ef4 VP |
2751 | return ret; |
2752 | } | |
2753 | ||
570db170 SG |
2754 | static int |
2755 | isert_handle_prot_cmd(struct isert_conn *isert_conn, | |
2756 | struct isert_cmd *isert_cmd, | |
2757 | struct isert_rdma_wr *wr) | |
2758 | { | |
dac6ab30 | 2759 | struct isert_device *device = isert_conn->device; |
570db170 SG |
2760 | struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd; |
2761 | int ret; | |
2762 | ||
2763 | if (!wr->fr_desc->pi_ctx) { | |
2764 | ret = isert_create_pi_ctx(wr->fr_desc, | |
2765 | device->ib_device, | |
67cb3949 | 2766 | device->pd); |
570db170 | 2767 | if (ret) { |
24f412dd | 2768 | isert_err("conn %p failed to allocate pi_ctx\n", |
570db170 SG |
2769 | isert_conn); |
2770 | return ret; | |
2771 | } | |
2772 | } | |
2773 | ||
2774 | if (se_cmd->t_prot_sg) { | |
2775 | ret = isert_map_data_buf(isert_conn, isert_cmd, | |
2776 | se_cmd->t_prot_sg, | |
2777 | se_cmd->t_prot_nents, | |
2778 | se_cmd->prot_length, | |
2779 | 0, wr->iser_ib_op, &wr->prot); | |
2780 | if (ret) { | |
24f412dd | 2781 | isert_err("conn %p failed to map protection buffer\n", |
570db170 SG |
2782 | isert_conn); |
2783 | return ret; | |
2784 | } | |
2785 | ||
2786 | memset(&wr->ib_sg[PROT], 0, sizeof(wr->ib_sg[PROT])); | |
2787 | ret = isert_fast_reg_mr(isert_conn, wr->fr_desc, &wr->prot, | |
2788 | ISERT_PROT_KEY_VALID, &wr->ib_sg[PROT]); | |
2789 | if (ret) { | |
24f412dd | 2790 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2791 | isert_conn); |
2792 | goto unmap_prot_cmd; | |
2793 | } | |
2794 | } | |
2795 | ||
2796 | ret = isert_reg_sig_mr(isert_conn, se_cmd, wr, wr->fr_desc); | |
2797 | if (ret) { | |
24f412dd | 2798 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2799 | isert_conn); |
2800 | goto unmap_prot_cmd; | |
2801 | } | |
2802 | wr->fr_desc->ind |= ISERT_PROTECTED; | |
2803 | ||
2804 | return 0; | |
2805 | ||
2806 | unmap_prot_cmd: | |
2807 | if (se_cmd->t_prot_sg) | |
2808 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
2809 | ||
2810 | return ret; | |
2811 | } | |
2812 | ||
59464ef4 | 2813 | static int |
a3a5a826 SG |
2814 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2815 | struct isert_rdma_wr *wr) | |
59464ef4 VP |
2816 | { |
2817 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
2818 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
e3d7e4c3 | 2819 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2820 | struct fast_reg_descriptor *fr_desc = NULL; |
570db170 SG |
2821 | struct ib_send_wr *send_wr; |
2822 | struct ib_sge *ib_sg; | |
e3d7e4c3 SG |
2823 | u32 offset; |
2824 | int ret = 0; | |
59464ef4 VP |
2825 | unsigned long flags; |
2826 | ||
e3d7e4c3 | 2827 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
59464ef4 | 2828 | |
e3d7e4c3 SG |
2829 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2830 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2831 | se_cmd->t_data_nents, se_cmd->data_length, | |
2832 | offset, wr->iser_ib_op, &wr->data); | |
2833 | if (ret) | |
2834 | return ret; | |
59464ef4 | 2835 | |
302cc7c3 | 2836 | if (wr->data.dma_nents != 1 || isert_prot_cmd(isert_conn, se_cmd)) { |
dac6ab30 SG |
2837 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2838 | fr_desc = list_first_entry(&isert_conn->fr_pool, | |
e3d7e4c3 SG |
2839 | struct fast_reg_descriptor, list); |
2840 | list_del(&fr_desc->list); | |
dac6ab30 | 2841 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); |
e3d7e4c3 | 2842 | wr->fr_desc = fr_desc; |
59464ef4 | 2843 | } |
59464ef4 | 2844 | |
9e961ae7 | 2845 | ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, |
570db170 | 2846 | ISERT_DATA_KEY_VALID, &wr->ib_sg[DATA]); |
e3d7e4c3 SG |
2847 | if (ret) |
2848 | goto unmap_cmd; | |
59464ef4 | 2849 | |
302cc7c3 | 2850 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
570db170 | 2851 | ret = isert_handle_prot_cmd(isert_conn, isert_cmd, wr); |
9e961ae7 | 2852 | if (ret) |
570db170 | 2853 | goto unmap_cmd; |
9e961ae7 | 2854 | |
570db170 SG |
2855 | ib_sg = &wr->ib_sg[SIG]; |
2856 | } else { | |
2857 | ib_sg = &wr->ib_sg[DATA]; | |
2858 | } | |
9e961ae7 | 2859 | |
570db170 | 2860 | memcpy(&wr->s_ib_sge, ib_sg, sizeof(*ib_sg)); |
e3d7e4c3 | 2861 | wr->ib_sge = &wr->s_ib_sge; |
59464ef4 VP |
2862 | wr->send_wr_num = 1; |
2863 | memset(&wr->s_send_wr, 0, sizeof(*send_wr)); | |
2864 | wr->send_wr = &wr->s_send_wr; | |
59464ef4 | 2865 | wr->isert_cmd = isert_cmd; |
59464ef4 VP |
2866 | |
2867 | send_wr = &isert_cmd->rdma_wr.s_send_wr; | |
e3d7e4c3 | 2868 | send_wr->sg_list = &wr->s_ib_sge; |
59464ef4 | 2869 | send_wr->num_sge = 1; |
b0a191e7 | 2870 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
59464ef4 VP |
2871 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
2872 | send_wr->opcode = IB_WR_RDMA_WRITE; | |
2873 | send_wr->wr.rdma.remote_addr = isert_cmd->read_va; | |
2874 | send_wr->wr.rdma.rkey = isert_cmd->read_stag; | |
302cc7c3 | 2875 | send_wr->send_flags = !isert_prot_cmd(isert_conn, se_cmd) ? |
9e961ae7 | 2876 | 0 : IB_SEND_SIGNALED; |
59464ef4 VP |
2877 | } else { |
2878 | send_wr->opcode = IB_WR_RDMA_READ; | |
2879 | send_wr->wr.rdma.remote_addr = isert_cmd->write_va; | |
2880 | send_wr->wr.rdma.rkey = isert_cmd->write_stag; | |
2881 | send_wr->send_flags = IB_SEND_SIGNALED; | |
2882 | } | |
2883 | ||
e3d7e4c3 | 2884 | return 0; |
570db170 | 2885 | |
e3d7e4c3 SG |
2886 | unmap_cmd: |
2887 | if (fr_desc) { | |
dac6ab30 SG |
2888 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2889 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); | |
2890 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); | |
59464ef4 | 2891 | } |
e3d7e4c3 | 2892 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 | 2893 | |
59464ef4 VP |
2894 | return ret; |
2895 | } | |
2896 | ||
90ecc6e2 VP |
2897 | static int |
2898 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2899 | { | |
2900 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2901 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
90ecc6e2 | 2902 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2903 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2904 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2905 | struct ib_send_wr *wr_failed; |
2906 | int rc; | |
2907 | ||
24f412dd | 2908 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2909 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2910 | |
90ecc6e2 | 2911 | wr->iser_ib_op = ISER_IB_RDMA_WRITE; |
d40945d8 | 2912 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2913 | if (rc) { |
24f412dd | 2914 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 VP |
2915 | return rc; |
2916 | } | |
2917 | ||
302cc7c3 | 2918 | if (!isert_prot_cmd(isert_conn, se_cmd)) { |
9e961ae7 SG |
2919 | /* |
2920 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2921 | */ | |
2922 | isert_create_send_desc(isert_conn, isert_cmd, | |
2923 | &isert_cmd->tx_desc); | |
2924 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2925 | &isert_cmd->tx_desc.iscsi_header); | |
2926 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2927 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2928 | &isert_cmd->tx_desc.send_wr); |
9e961ae7 | 2929 | isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr; |
897bb2c9 | 2930 | wr->send_wr_num += 1; |
9e961ae7 | 2931 | } |
b8d26b3b | 2932 | |
dac6ab30 | 2933 | rc = ib_post_send(isert_conn->qp, wr->send_wr, &wr_failed); |
bdf20e72 | 2934 | if (rc) |
24f412dd | 2935 | isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); |
9e961ae7 | 2936 | |
302cc7c3 | 2937 | if (!isert_prot_cmd(isert_conn, se_cmd)) |
24f412dd | 2938 | isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data " |
9e961ae7 SG |
2939 | "READ\n", isert_cmd); |
2940 | else | |
24f412dd | 2941 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", |
9e961ae7 | 2942 | isert_cmd); |
b8d26b3b | 2943 | |
90ecc6e2 | 2944 | return 1; |
b8d26b3b NB |
2945 | } |
2946 | ||
2947 | static int | |
2948 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2949 | { | |
2950 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2951 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 2952 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2953 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2954 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2955 | struct ib_send_wr *wr_failed; |
2956 | int rc; | |
b8d26b3b | 2957 | |
24f412dd | 2958 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
90ecc6e2 | 2959 | isert_cmd, se_cmd->data_length, cmd->write_data_done); |
b8d26b3b | 2960 | wr->iser_ib_op = ISER_IB_RDMA_READ; |
d40945d8 | 2961 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2962 | if (rc) { |
24f412dd | 2963 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 | 2964 | return rc; |
b8d26b3b NB |
2965 | } |
2966 | ||
dac6ab30 | 2967 | rc = ib_post_send(isert_conn->qp, wr->send_wr, &wr_failed); |
bdf20e72 | 2968 | if (rc) |
24f412dd | 2969 | isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); |
bdf20e72 | 2970 | |
24f412dd | 2971 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", |
90ecc6e2 | 2972 | isert_cmd); |
b8d26b3b | 2973 | |
90ecc6e2 | 2974 | return 0; |
b8d26b3b NB |
2975 | } |
2976 | ||
2977 | static int | |
2978 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2979 | { | |
2980 | int ret; | |
2981 | ||
2982 | switch (state) { | |
2983 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
2984 | ret = isert_put_nopin(cmd, conn, false); | |
2985 | break; | |
2986 | default: | |
24f412dd | 2987 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
2988 | ret = -EINVAL; |
2989 | break; | |
2990 | } | |
2991 | ||
2992 | return ret; | |
2993 | } | |
2994 | ||
2995 | static int | |
2996 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2997 | { | |
991bb764 | 2998 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2999 | int ret; |
3000 | ||
3001 | switch (state) { | |
3002 | case ISTATE_SEND_LOGOUTRSP: | |
3003 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
3004 | if (!ret) |
3005 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
3006 | break; |
3007 | case ISTATE_SEND_NOPIN: | |
3008 | ret = isert_put_nopin(cmd, conn, true); | |
3009 | break; | |
3010 | case ISTATE_SEND_TASKMGTRSP: | |
3011 | ret = isert_put_tm_rsp(cmd, conn); | |
3012 | break; | |
3013 | case ISTATE_SEND_REJECT: | |
3014 | ret = isert_put_reject(cmd, conn); | |
3015 | break; | |
adb54c29 NB |
3016 | case ISTATE_SEND_TEXTRSP: |
3017 | ret = isert_put_text_rsp(cmd, conn); | |
3018 | break; | |
b8d26b3b NB |
3019 | case ISTATE_SEND_STATUS: |
3020 | /* | |
3021 | * Special case for sending non GOOD SCSI status from TX thread | |
3022 | * context during pre se_cmd excecution failure. | |
3023 | */ | |
3024 | ret = isert_put_response(conn, cmd); | |
3025 | break; | |
3026 | default: | |
24f412dd | 3027 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
3028 | ret = -EINVAL; |
3029 | break; | |
3030 | } | |
3031 | ||
3032 | return ret; | |
3033 | } | |
3034 | ||
ca6c1d82 SG |
3035 | struct rdma_cm_id * |
3036 | isert_setup_id(struct isert_np *isert_np) | |
3037 | { | |
3038 | struct iscsi_np *np = isert_np->np; | |
3039 | struct rdma_cm_id *id; | |
3040 | struct sockaddr *sa; | |
3041 | int ret; | |
3042 | ||
3043 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 3044 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 SG |
3045 | |
3046 | id = rdma_create_id(isert_cma_handler, isert_np, | |
3047 | RDMA_PS_TCP, IB_QPT_RC); | |
3048 | if (IS_ERR(id)) { | |
24f412dd | 3049 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
3050 | ret = PTR_ERR(id); |
3051 | goto out; | |
3052 | } | |
24f412dd | 3053 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 SG |
3054 | |
3055 | ret = rdma_bind_addr(id, sa); | |
3056 | if (ret) { | |
24f412dd | 3057 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
3058 | goto out_id; |
3059 | } | |
3060 | ||
992607e8 | 3061 | ret = rdma_listen(id, 0); |
ca6c1d82 | 3062 | if (ret) { |
24f412dd | 3063 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
3064 | goto out_id; |
3065 | } | |
3066 | ||
3067 | return id; | |
3068 | out_id: | |
3069 | rdma_destroy_id(id); | |
3070 | out: | |
3071 | return ERR_PTR(ret); | |
3072 | } | |
3073 | ||
b8d26b3b NB |
3074 | static int |
3075 | isert_setup_np(struct iscsi_np *np, | |
3076 | struct __kernel_sockaddr_storage *ksockaddr) | |
3077 | { | |
3078 | struct isert_np *isert_np; | |
3079 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
3080 | int ret; |
3081 | ||
3082 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
3083 | if (!isert_np) { | |
24f412dd | 3084 | isert_err("Unable to allocate struct isert_np\n"); |
b8d26b3b NB |
3085 | return -ENOMEM; |
3086 | } | |
531b7bf4 | 3087 | sema_init(&isert_np->np_sem, 0); |
b8d26b3b NB |
3088 | mutex_init(&isert_np->np_accept_mutex); |
3089 | INIT_LIST_HEAD(&isert_np->np_accept_list); | |
3090 | init_completion(&isert_np->np_login_comp); | |
ca6c1d82 | 3091 | isert_np->np = np; |
b8d26b3b | 3092 | |
b8d26b3b NB |
3093 | /* |
3094 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
3095 | * in iscsi_target_configfs.c code.. | |
3096 | */ | |
3097 | memcpy(&np->np_sockaddr, ksockaddr, | |
3098 | sizeof(struct __kernel_sockaddr_storage)); | |
3099 | ||
ca6c1d82 | 3100 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 3101 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
3102 | ret = PTR_ERR(isert_lid); |
3103 | goto out; | |
3104 | } | |
3105 | ||
b8d26b3b NB |
3106 | isert_np->np_cm_id = isert_lid; |
3107 | np->np_context = isert_np; | |
b8d26b3b NB |
3108 | |
3109 | return 0; | |
3110 | ||
b8d26b3b NB |
3111 | out: |
3112 | kfree(isert_np); | |
ca6c1d82 | 3113 | |
b8d26b3b NB |
3114 | return ret; |
3115 | } | |
3116 | ||
b8d26b3b NB |
3117 | static int |
3118 | isert_rdma_accept(struct isert_conn *isert_conn) | |
3119 | { | |
dac6ab30 | 3120 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
3121 | struct rdma_conn_param cp; |
3122 | int ret; | |
3123 | ||
3124 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
3125 | cp.initiator_depth = isert_conn->initiator_depth; |
3126 | cp.retry_count = 7; | |
3127 | cp.rnr_retry_count = 7; | |
3128 | ||
b8d26b3b NB |
3129 | ret = rdma_accept(cm_id, &cp); |
3130 | if (ret) { | |
24f412dd | 3131 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
3132 | return ret; |
3133 | } | |
3134 | ||
b8d26b3b NB |
3135 | return 0; |
3136 | } | |
3137 | ||
3138 | static int | |
3139 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
3140 | { | |
6700425e | 3141 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
3142 | int ret; |
3143 | ||
24f412dd | 3144 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
3145 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
3146 | if (ret) { | |
24f412dd | 3147 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
3148 | isert_conn); |
3149 | return ret; | |
3150 | } | |
3151 | reinit_completion(&isert_conn->login_req_comp); | |
3152 | ||
6faaa85f NB |
3153 | /* |
3154 | * For login requests after the first PDU, isert_rx_login_req() will | |
3155 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
3156 | * received, which turns this callback from iscsi_target_do_login_rx() | |
3157 | * into a NOP. | |
3158 | */ | |
3159 | if (!login->first_request) | |
3160 | return 0; | |
b8d26b3b | 3161 | |
2371e5da SG |
3162 | isert_rx_login_req(isert_conn); |
3163 | ||
dac6ab30 SG |
3164 | isert_info("before login_comp conn: %p\n", conn); |
3165 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
3166 | if (ret) |
3167 | return ret; | |
3168 | ||
24f412dd | 3169 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 3170 | |
b8d26b3b NB |
3171 | return 0; |
3172 | } | |
3173 | ||
3174 | static void | |
3175 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
3176 | struct isert_conn *isert_conn) | |
3177 | { | |
dac6ab30 | 3178 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
3179 | struct rdma_route *cm_route = &cm_id->route; |
3180 | struct sockaddr_in *sock_in; | |
3181 | struct sockaddr_in6 *sock_in6; | |
3182 | ||
3183 | conn->login_family = np->np_sockaddr.ss_family; | |
3184 | ||
3185 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3186 | sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.dst_addr; | |
3187 | snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c", | |
3188 | &sock_in6->sin6_addr.in6_u); | |
3189 | conn->login_port = ntohs(sock_in6->sin6_port); | |
3190 | ||
3191 | sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.src_addr; | |
3192 | snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c", | |
3193 | &sock_in6->sin6_addr.in6_u); | |
3194 | conn->local_port = ntohs(sock_in6->sin6_port); | |
3195 | } else { | |
3196 | sock_in = (struct sockaddr_in *)&cm_route->addr.dst_addr; | |
3197 | sprintf(conn->login_ip, "%pI4", | |
3198 | &sock_in->sin_addr.s_addr); | |
3199 | conn->login_port = ntohs(sock_in->sin_port); | |
3200 | ||
3201 | sock_in = (struct sockaddr_in *)&cm_route->addr.src_addr; | |
3202 | sprintf(conn->local_ip, "%pI4", | |
3203 | &sock_in->sin_addr.s_addr); | |
3204 | conn->local_port = ntohs(sock_in->sin_port); | |
3205 | } | |
3206 | } | |
3207 | ||
3208 | static int | |
3209 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
3210 | { | |
6700425e | 3211 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 3212 | struct isert_conn *isert_conn; |
c6b8e918 | 3213 | int ret; |
b8d26b3b NB |
3214 | |
3215 | accept_wait: | |
531b7bf4 | 3216 | ret = down_interruptible(&isert_np->np_sem); |
c6b8e918 | 3217 | if (ret) |
b8d26b3b NB |
3218 | return -ENODEV; |
3219 | ||
3220 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 3221 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 3222 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 3223 | isert_dbg("np_thread_state %d\n", |
e346ab34 SG |
3224 | np->np_thread_state); |
3225 | /** | |
3226 | * No point in stalling here when np_thread | |
3227 | * is in state RESET/SHUTDOWN/EXIT - bail | |
3228 | **/ | |
b8d26b3b NB |
3229 | return -ENODEV; |
3230 | } | |
3231 | spin_unlock_bh(&np->np_thread_lock); | |
3232 | ||
3233 | mutex_lock(&isert_np->np_accept_mutex); | |
3234 | if (list_empty(&isert_np->np_accept_list)) { | |
3235 | mutex_unlock(&isert_np->np_accept_mutex); | |
b8d26b3b NB |
3236 | goto accept_wait; |
3237 | } | |
3238 | isert_conn = list_first_entry(&isert_np->np_accept_list, | |
dac6ab30 SG |
3239 | struct isert_conn, accept_node); |
3240 | list_del_init(&isert_conn->accept_node); | |
b8d26b3b NB |
3241 | mutex_unlock(&isert_np->np_accept_mutex); |
3242 | ||
3243 | conn->context = isert_conn; | |
3244 | isert_conn->conn = conn; | |
b8d26b3b | 3245 | |
b8d26b3b NB |
3246 | isert_set_conn_info(np, conn, isert_conn); |
3247 | ||
24f412dd | 3248 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 3249 | |
b8d26b3b NB |
3250 | return 0; |
3251 | } | |
3252 | ||
3253 | static void | |
3254 | isert_free_np(struct iscsi_np *np) | |
3255 | { | |
6700425e | 3256 | struct isert_np *isert_np = np->np_context; |
268e6811 | 3257 | struct isert_conn *isert_conn, *n; |
b8d26b3b | 3258 | |
3b726ae2 SG |
3259 | if (isert_np->np_cm_id) |
3260 | rdma_destroy_id(isert_np->np_cm_id); | |
b8d26b3b | 3261 | |
268e6811 SG |
3262 | /* |
3263 | * FIXME: At this point we don't have a good way to insure | |
3264 | * that at this point we don't have hanging connections that | |
3265 | * completed RDMA establishment but didn't start iscsi login | |
3266 | * process. So work-around this by cleaning up what ever piled | |
3267 | * up in np_accept_list. | |
3268 | */ | |
3269 | mutex_lock(&isert_np->np_accept_mutex); | |
3270 | if (!list_empty(&isert_np->np_accept_list)) { | |
24f412dd | 3271 | isert_info("Still have isert connections, cleaning up...\n"); |
268e6811 SG |
3272 | list_for_each_entry_safe(isert_conn, n, |
3273 | &isert_np->np_accept_list, | |
dac6ab30 | 3274 | accept_node) { |
24f412dd | 3275 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 SG |
3276 | isert_conn, isert_conn->state); |
3277 | isert_connect_release(isert_conn); | |
3278 | } | |
3279 | } | |
3280 | mutex_unlock(&isert_np->np_accept_mutex); | |
3281 | ||
b8d26b3b NB |
3282 | np->np_context = NULL; |
3283 | kfree(isert_np); | |
3284 | } | |
3285 | ||
b02efbfc SG |
3286 | static void isert_release_work(struct work_struct *work) |
3287 | { | |
3288 | struct isert_conn *isert_conn = container_of(work, | |
3289 | struct isert_conn, | |
3290 | release_work); | |
3291 | ||
24f412dd | 3292 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 3293 | |
dac6ab30 | 3294 | wait_for_completion(&isert_conn->wait); |
b02efbfc | 3295 | |
dac6ab30 | 3296 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 3297 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 3298 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 3299 | |
24f412dd | 3300 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
3301 | isert_put_conn(isert_conn); |
3302 | } | |
3303 | ||
991bb764 SG |
3304 | static void |
3305 | isert_wait4logout(struct isert_conn *isert_conn) | |
3306 | { | |
3307 | struct iscsi_conn *conn = isert_conn->conn; | |
3308 | ||
4c22e07f SG |
3309 | isert_info("conn %p\n", isert_conn); |
3310 | ||
991bb764 | 3311 | if (isert_conn->logout_posted) { |
24f412dd | 3312 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
3313 | wait_for_completion_timeout(&conn->conn_logout_comp, |
3314 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3315 | } | |
3316 | } | |
3317 | ||
c7e160ee SG |
3318 | static void |
3319 | isert_wait4cmds(struct iscsi_conn *conn) | |
3320 | { | |
4c22e07f SG |
3321 | isert_info("iscsi_conn %p\n", conn); |
3322 | ||
c7e160ee SG |
3323 | if (conn->sess) { |
3324 | target_sess_cmd_list_set_waiting(conn->sess->se_sess); | |
3325 | target_wait_for_sess_cmds(conn->sess->se_sess); | |
3326 | } | |
3327 | } | |
3328 | ||
bdf20e72 SG |
3329 | static void |
3330 | isert_wait4flush(struct isert_conn *isert_conn) | |
3331 | { | |
3332 | struct ib_recv_wr *bad_wr; | |
3333 | ||
4c22e07f SG |
3334 | isert_info("conn %p\n", isert_conn); |
3335 | ||
dac6ab30 | 3336 | init_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3337 | isert_conn->beacon.wr_id = ISER_BEACON_WRID; |
3338 | /* post an indication that all flush errors were consumed */ | |
dac6ab30 | 3339 | if (ib_post_recv(isert_conn->qp, &isert_conn->beacon, &bad_wr)) { |
24f412dd | 3340 | isert_err("conn %p failed to post beacon", isert_conn); |
bdf20e72 SG |
3341 | return; |
3342 | } | |
3343 | ||
dac6ab30 | 3344 | wait_for_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3345 | } |
3346 | ||
defd8848 | 3347 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
3348 | { |
3349 | struct isert_conn *isert_conn = conn->context; | |
3350 | ||
4c22e07f | 3351 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 3352 | |
dac6ab30 | 3353 | mutex_lock(&isert_conn->mutex); |
b8d26b3b | 3354 | /* |
dac6ab30 | 3355 | * Only wait for wait_comp_err if the isert_conn made it |
b8d26b3b NB |
3356 | * into full feature phase.. |
3357 | */ | |
b2cb9649 | 3358 | if (isert_conn->state == ISER_CONN_INIT) { |
dac6ab30 | 3359 | mutex_unlock(&isert_conn->mutex); |
b2cb9649 | 3360 | return; |
b8d26b3b | 3361 | } |
954f2372 | 3362 | isert_conn_terminate(isert_conn); |
dac6ab30 | 3363 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 3364 | |
c7e160ee | 3365 | isert_wait4cmds(conn); |
bdf20e72 | 3366 | isert_wait4flush(isert_conn); |
991bb764 | 3367 | isert_wait4logout(isert_conn); |
954f2372 | 3368 | |
b02efbfc SG |
3369 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
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 NB |
3376 | |
3377 | isert_put_conn(isert_conn); | |
3378 | } | |
3379 | ||
3380 | static struct iscsit_transport iser_target_transport = { | |
3381 | .name = "IB/iSER", | |
3382 | .transport_type = ISCSI_INFINIBAND, | |
d703ce2f | 3383 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
3384 | .owner = THIS_MODULE, |
3385 | .iscsit_setup_np = isert_setup_np, | |
3386 | .iscsit_accept_np = isert_accept_np, | |
3387 | .iscsit_free_np = isert_free_np, | |
defd8848 | 3388 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 3389 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
3390 | .iscsit_get_login_rx = isert_get_login_rx, |
3391 | .iscsit_put_login_tx = isert_put_login_tx, | |
3392 | .iscsit_immediate_queue = isert_immediate_queue, | |
3393 | .iscsit_response_queue = isert_response_queue, | |
3394 | .iscsit_get_dataout = isert_get_dataout, | |
3395 | .iscsit_queue_data_in = isert_put_datain, | |
3396 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 3397 | .iscsit_aborted_task = isert_aborted_task, |
e70beee7 | 3398 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
3399 | }; |
3400 | ||
3401 | static int __init isert_init(void) | |
3402 | { | |
3403 | int ret; | |
3404 | ||
631af550 SG |
3405 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
3406 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 3407 | if (!isert_comp_wq) { |
24f412dd | 3408 | isert_err("Unable to allocate isert_comp_wq\n"); |
b8d26b3b | 3409 | ret = -ENOMEM; |
6f0fae3d | 3410 | return -ENOMEM; |
b8d26b3b NB |
3411 | } |
3412 | ||
b02efbfc SG |
3413 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
3414 | WQ_UNBOUND_MAX_ACTIVE); | |
3415 | if (!isert_release_wq) { | |
24f412dd | 3416 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
3417 | ret = -ENOMEM; |
3418 | goto destroy_comp_wq; | |
3419 | } | |
3420 | ||
b8d26b3b | 3421 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 3422 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 3423 | |
b8d26b3b NB |
3424 | return 0; |
3425 | ||
b02efbfc SG |
3426 | destroy_comp_wq: |
3427 | destroy_workqueue(isert_comp_wq); | |
6f0fae3d | 3428 | |
b8d26b3b NB |
3429 | return ret; |
3430 | } | |
3431 | ||
3432 | static void __exit isert_exit(void) | |
3433 | { | |
f5ebec96 | 3434 | flush_scheduled_work(); |
b02efbfc | 3435 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 3436 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 3437 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 3438 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
b8d26b3b NB |
3439 | } |
3440 | ||
3441 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
9e35eff4 | 3442 | MODULE_VERSION("1.0"); |
b8d26b3b NB |
3443 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
3444 | MODULE_LICENSE("GPL"); | |
3445 | ||
3446 | module_init(isert_init); | |
3447 | module_exit(isert_exit); |