Commit | Line | Data |
---|---|---|
b8d26b3b NB |
1 | /******************************************************************************* |
2 | * This file contains iSCSI extentions for RDMA (iSER) Verbs | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2013 Datera, Inc. |
b8d26b3b NB |
5 | * |
6 | * Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ****************************************************************************/ | |
18 | ||
19 | #include <linux/string.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/scatterlist.h> | |
22 | #include <linux/socket.h> | |
23 | #include <linux/in.h> | |
24 | #include <linux/in6.h> | |
25 | #include <rdma/ib_verbs.h> | |
26 | #include <rdma/rdma_cm.h> | |
27 | #include <target/target_core_base.h> | |
28 | #include <target/target_core_fabric.h> | |
29 | #include <target/iscsi/iscsi_transport.h> | |
531b7bf4 | 30 | #include <linux/semaphore.h> |
b8d26b3b NB |
31 | |
32 | #include "isert_proto.h" | |
33 | #include "ib_isert.h" | |
34 | ||
35 | #define ISERT_MAX_CONN 8 | |
36 | #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN) | |
37 | #define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * ISERT_MAX_CONN) | |
bdf20e72 SG |
38 | #define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \ |
39 | ISERT_MAX_CONN) | |
b8d26b3b | 40 | |
45678b6b | 41 | static int isert_debug_level; |
24f412dd SG |
42 | module_param_named(debug_level, isert_debug_level, int, 0644); |
43 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)"); | |
44 | ||
b8d26b3b NB |
45 | static DEFINE_MUTEX(device_list_mutex); |
46 | static LIST_HEAD(device_list); | |
b8d26b3b | 47 | static struct workqueue_struct *isert_comp_wq; |
b02efbfc | 48 | static struct workqueue_struct *isert_release_wq; |
b8d26b3b | 49 | |
d40945d8 VP |
50 | static void |
51 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); | |
52 | static int | |
53 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
54 | struct isert_rdma_wr *wr); | |
59464ef4 | 55 | static void |
a3a5a826 | 56 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); |
59464ef4 | 57 | static int |
a3a5a826 SG |
58 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
59 | struct isert_rdma_wr *wr); | |
f93f3a70 SG |
60 | static int |
61 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); | |
2371e5da SG |
62 | static int |
63 | isert_rdma_post_recvl(struct isert_conn *isert_conn); | |
64 | static int | |
65 | isert_rdma_accept(struct isert_conn *isert_conn); | |
ca6c1d82 | 66 | struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); |
d40945d8 | 67 | |
2f1b6b7d SG |
68 | static void isert_release_work(struct work_struct *work); |
69 | ||
302cc7c3 SG |
70 | static inline bool |
71 | isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) | |
72 | { | |
23a548ee | 73 | return (conn->pi_support && |
302cc7c3 SG |
74 | cmd->prot_op != TARGET_PROT_NORMAL); |
75 | } | |
76 | ||
77 | ||
b8d26b3b NB |
78 | static void |
79 | isert_qp_event_callback(struct ib_event *e, void *context) | |
80 | { | |
6700425e | 81 | struct isert_conn *isert_conn = context; |
b8d26b3b | 82 | |
ea8a1616 SG |
83 | isert_err("%s (%d): conn %p\n", |
84 | ib_event_msg(e->event), e->event, isert_conn); | |
85 | ||
b8d26b3b NB |
86 | switch (e->event) { |
87 | case IB_EVENT_COMM_EST: | |
dac6ab30 | 88 | rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST); |
b8d26b3b NB |
89 | break; |
90 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
4c22e07f | 91 | isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); |
b8d26b3b NB |
92 | break; |
93 | default: | |
94 | break; | |
95 | } | |
96 | } | |
97 | ||
98 | static int | |
99 | isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) | |
100 | { | |
101 | int ret; | |
102 | ||
103 | ret = ib_query_device(ib_dev, devattr); | |
104 | if (ret) { | |
24f412dd | 105 | isert_err("ib_query_device() failed: %d\n", ret); |
b8d26b3b NB |
106 | return ret; |
107 | } | |
24f412dd SG |
108 | isert_dbg("devattr->max_sge: %d\n", devattr->max_sge); |
109 | isert_dbg("devattr->max_sge_rd: %d\n", devattr->max_sge_rd); | |
b8d26b3b NB |
110 | |
111 | return 0; | |
112 | } | |
113 | ||
40fc069a SG |
114 | static struct isert_comp * |
115 | isert_comp_get(struct isert_conn *isert_conn) | |
b8d26b3b | 116 | { |
dac6ab30 | 117 | struct isert_device *device = isert_conn->device; |
4a295bae | 118 | struct isert_comp *comp; |
40fc069a | 119 | int i, min = 0; |
b8d26b3b | 120 | |
b8d26b3b | 121 | mutex_lock(&device_list_mutex); |
4a295bae SG |
122 | for (i = 0; i < device->comps_used; i++) |
123 | if (device->comps[i].active_qps < | |
124 | device->comps[min].active_qps) | |
125 | min = i; | |
126 | comp = &device->comps[min]; | |
127 | comp->active_qps++; | |
40fc069a SG |
128 | mutex_unlock(&device_list_mutex); |
129 | ||
24f412dd | 130 | isert_info("conn %p, using comp %p min_index: %d\n", |
4a295bae | 131 | isert_conn, comp, min); |
40fc069a SG |
132 | |
133 | return comp; | |
134 | } | |
135 | ||
136 | static void | |
137 | isert_comp_put(struct isert_comp *comp) | |
138 | { | |
139 | mutex_lock(&device_list_mutex); | |
140 | comp->active_qps--; | |
b8d26b3b | 141 | mutex_unlock(&device_list_mutex); |
40fc069a SG |
142 | } |
143 | ||
144 | static struct ib_qp * | |
145 | isert_create_qp(struct isert_conn *isert_conn, | |
146 | struct isert_comp *comp, | |
147 | struct rdma_cm_id *cma_id) | |
148 | { | |
dac6ab30 | 149 | struct isert_device *device = isert_conn->device; |
40fc069a SG |
150 | struct ib_qp_init_attr attr; |
151 | int ret; | |
b8d26b3b NB |
152 | |
153 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); | |
154 | attr.event_handler = isert_qp_event_callback; | |
155 | attr.qp_context = isert_conn; | |
6f0fae3d SG |
156 | attr.send_cq = comp->cq; |
157 | attr.recv_cq = comp->cq; | |
b8d26b3b | 158 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; |
bdf20e72 | 159 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; |
f1a47d37 SG |
160 | attr.cap.max_send_sge = device->dev_attr.max_sge; |
161 | isert_conn->max_sge = min(device->dev_attr.max_sge, | |
162 | device->dev_attr.max_sge_rd); | |
b8d26b3b NB |
163 | attr.cap.max_recv_sge = 1; |
164 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
165 | attr.qp_type = IB_QPT_RC; | |
570db170 | 166 | if (device->pi_capable) |
d3e125da | 167 | attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; |
b8d26b3b | 168 | |
67cb3949 | 169 | ret = rdma_create_qp(cma_id, device->pd, &attr); |
b8d26b3b | 170 | if (ret) { |
24f412dd | 171 | isert_err("rdma_create_qp failed for cma_id %d\n", ret); |
40fc069a SG |
172 | return ERR_PTR(ret); |
173 | } | |
174 | ||
175 | return cma_id->qp; | |
176 | } | |
177 | ||
178 | static int | |
179 | isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) | |
180 | { | |
181 | struct isert_comp *comp; | |
182 | int ret; | |
183 | ||
184 | comp = isert_comp_get(isert_conn); | |
dac6ab30 SG |
185 | isert_conn->qp = isert_create_qp(isert_conn, comp, cma_id); |
186 | if (IS_ERR(isert_conn->qp)) { | |
187 | ret = PTR_ERR(isert_conn->qp); | |
19e2090f | 188 | goto err; |
b8d26b3b | 189 | } |
b8d26b3b NB |
190 | |
191 | return 0; | |
19e2090f | 192 | err: |
40fc069a | 193 | isert_comp_put(comp); |
19e2090f | 194 | return ret; |
b8d26b3b NB |
195 | } |
196 | ||
197 | static void | |
198 | isert_cq_event_callback(struct ib_event *e, void *context) | |
199 | { | |
4c22e07f | 200 | isert_dbg("event: %d\n", e->event); |
b8d26b3b NB |
201 | } |
202 | ||
203 | static int | |
204 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
205 | { | |
dac6ab30 | 206 | struct isert_device *device = isert_conn->device; |
67cb3949 | 207 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
208 | struct iser_rx_desc *rx_desc; |
209 | struct ib_sge *rx_sg; | |
210 | u64 dma_addr; | |
211 | int i, j; | |
212 | ||
dac6ab30 | 213 | isert_conn->rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * |
b8d26b3b | 214 | sizeof(struct iser_rx_desc), GFP_KERNEL); |
dac6ab30 | 215 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
216 | goto fail; |
217 | ||
dac6ab30 | 218 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
219 | |
220 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
221 | dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, | |
222 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
223 | if (ib_dma_mapping_error(ib_dev, dma_addr)) | |
224 | goto dma_map_fail; | |
225 | ||
226 | rx_desc->dma_addr = dma_addr; | |
227 | ||
228 | rx_sg = &rx_desc->rx_sg; | |
229 | rx_sg->addr = rx_desc->dma_addr; | |
230 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; | |
34efc7df | 231 | rx_sg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
232 | } |
233 | ||
b8d26b3b NB |
234 | return 0; |
235 | ||
236 | dma_map_fail: | |
dac6ab30 | 237 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
238 | for (j = 0; j < i; j++, rx_desc++) { |
239 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
240 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
241 | } | |
dac6ab30 SG |
242 | kfree(isert_conn->rx_descs); |
243 | isert_conn->rx_descs = NULL; | |
b8d26b3b | 244 | fail: |
4c22e07f SG |
245 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
246 | ||
b8d26b3b NB |
247 | return -ENOMEM; |
248 | } | |
249 | ||
250 | static void | |
251 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
252 | { | |
dac6ab30 | 253 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
254 | struct iser_rx_desc *rx_desc; |
255 | int i; | |
256 | ||
dac6ab30 | 257 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
258 | return; |
259 | ||
dac6ab30 | 260 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
261 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
262 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
263 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
264 | } | |
265 | ||
dac6ab30 SG |
266 | kfree(isert_conn->rx_descs); |
267 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
268 | } |
269 | ||
6f0fae3d SG |
270 | static void isert_cq_work(struct work_struct *); |
271 | static void isert_cq_callback(struct ib_cq *, void *); | |
b8d26b3b | 272 | |
172369c5 SG |
273 | static void |
274 | isert_free_comps(struct isert_device *device) | |
b8d26b3b | 275 | { |
172369c5 | 276 | int i; |
59464ef4 | 277 | |
172369c5 SG |
278 | for (i = 0; i < device->comps_used; i++) { |
279 | struct isert_comp *comp = &device->comps[i]; | |
b1a5ad00 | 280 | |
172369c5 SG |
281 | if (comp->cq) { |
282 | cancel_work_sync(&comp->work); | |
283 | ib_destroy_cq(comp->cq); | |
284 | } | |
59464ef4 | 285 | } |
172369c5 SG |
286 | kfree(device->comps); |
287 | } | |
d40945d8 | 288 | |
172369c5 SG |
289 | static int |
290 | isert_alloc_comps(struct isert_device *device, | |
291 | struct ib_device_attr *attr) | |
292 | { | |
293 | int i, max_cqe, ret = 0; | |
d3e125da | 294 | |
4a295bae | 295 | device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), |
172369c5 SG |
296 | device->ib_device->num_comp_vectors)); |
297 | ||
24f412dd | 298 | isert_info("Using %d CQs, %s supports %d vectors support " |
4a295bae SG |
299 | "Fast registration %d pi_capable %d\n", |
300 | device->comps_used, device->ib_device->name, | |
301 | device->ib_device->num_comp_vectors, device->use_fastreg, | |
302 | device->pi_capable); | |
303 | ||
304 | device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), | |
305 | GFP_KERNEL); | |
306 | if (!device->comps) { | |
24f412dd | 307 | isert_err("Unable to allocate completion contexts\n"); |
b8d26b3b NB |
308 | return -ENOMEM; |
309 | } | |
4a295bae | 310 | |
172369c5 SG |
311 | max_cqe = min(ISER_MAX_CQ_LEN, attr->max_cqe); |
312 | ||
4a295bae | 313 | for (i = 0; i < device->comps_used; i++) { |
8e37210b | 314 | struct ib_cq_init_attr cq_attr = {}; |
4a295bae SG |
315 | struct isert_comp *comp = &device->comps[i]; |
316 | ||
317 | comp->device = device; | |
6f0fae3d | 318 | INIT_WORK(&comp->work, isert_cq_work); |
8e37210b MB |
319 | cq_attr.cqe = max_cqe; |
320 | cq_attr.comp_vector = i; | |
6f0fae3d SG |
321 | comp->cq = ib_create_cq(device->ib_device, |
322 | isert_cq_callback, | |
323 | isert_cq_event_callback, | |
324 | (void *)comp, | |
8e37210b | 325 | &cq_attr); |
6f0fae3d | 326 | if (IS_ERR(comp->cq)) { |
172369c5 | 327 | isert_err("Unable to allocate cq\n"); |
6f0fae3d SG |
328 | ret = PTR_ERR(comp->cq); |
329 | comp->cq = NULL; | |
b8d26b3b | 330 | goto out_cq; |
94a71110 | 331 | } |
b8d26b3b | 332 | |
6f0fae3d | 333 | ret = ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
94a71110 | 334 | if (ret) |
b8d26b3b NB |
335 | goto out_cq; |
336 | } | |
337 | ||
172369c5 SG |
338 | return 0; |
339 | out_cq: | |
340 | isert_free_comps(device); | |
341 | return ret; | |
342 | } | |
343 | ||
344 | static int | |
345 | isert_create_device_ib_res(struct isert_device *device) | |
346 | { | |
172369c5 | 347 | struct ib_device_attr *dev_attr; |
fd8205e8 | 348 | int ret; |
172369c5 SG |
349 | |
350 | dev_attr = &device->dev_attr; | |
fd8205e8 | 351 | ret = isert_query_device(device->ib_device, dev_attr); |
172369c5 SG |
352 | if (ret) |
353 | return ret; | |
354 | ||
355 | /* asign function handlers */ | |
356 | if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS && | |
357 | dev_attr->device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) { | |
358 | device->use_fastreg = 1; | |
359 | device->reg_rdma_mem = isert_reg_rdma; | |
360 | device->unreg_rdma_mem = isert_unreg_rdma; | |
361 | } else { | |
362 | device->use_fastreg = 0; | |
363 | device->reg_rdma_mem = isert_map_rdma; | |
364 | device->unreg_rdma_mem = isert_unmap_cmd; | |
365 | } | |
366 | ||
367 | ret = isert_alloc_comps(device, dev_attr); | |
368 | if (ret) | |
369 | return ret; | |
370 | ||
67cb3949 SG |
371 | device->pd = ib_alloc_pd(device->ib_device); |
372 | if (IS_ERR(device->pd)) { | |
373 | ret = PTR_ERR(device->pd); | |
374 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
375 | device, ret); | |
376 | goto out_cq; | |
377 | } | |
378 | ||
172369c5 SG |
379 | /* Check signature cap */ |
380 | device->pi_capable = dev_attr->device_cap_flags & | |
381 | IB_DEVICE_SIGNATURE_HANDOVER ? true : false; | |
67cb3949 | 382 | |
b8d26b3b NB |
383 | return 0; |
384 | ||
385 | out_cq: | |
172369c5 | 386 | isert_free_comps(device); |
b8d26b3b NB |
387 | return ret; |
388 | } | |
389 | ||
390 | static void | |
391 | isert_free_device_ib_res(struct isert_device *device) | |
392 | { | |
24f412dd | 393 | isert_info("device %p\n", device); |
b8d26b3b | 394 | |
67cb3949 | 395 | ib_dealloc_pd(device->pd); |
172369c5 | 396 | isert_free_comps(device); |
b8d26b3b NB |
397 | } |
398 | ||
399 | static void | |
cf8ae958 | 400 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
401 | { |
402 | mutex_lock(&device_list_mutex); | |
403 | device->refcount--; | |
4c22e07f | 404 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
405 | if (!device->refcount) { |
406 | isert_free_device_ib_res(device); | |
407 | list_del(&device->dev_node); | |
408 | kfree(device); | |
409 | } | |
410 | mutex_unlock(&device_list_mutex); | |
411 | } | |
412 | ||
413 | static struct isert_device * | |
cf8ae958 | 414 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
415 | { |
416 | struct isert_device *device; | |
417 | int ret; | |
418 | ||
419 | mutex_lock(&device_list_mutex); | |
420 | list_for_each_entry(device, &device_list, dev_node) { | |
421 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
422 | device->refcount++; | |
4c22e07f SG |
423 | isert_info("Found iser device %p refcount %d\n", |
424 | device, device->refcount); | |
b8d26b3b NB |
425 | mutex_unlock(&device_list_mutex); |
426 | return device; | |
427 | } | |
428 | } | |
429 | ||
430 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
431 | if (!device) { | |
432 | mutex_unlock(&device_list_mutex); | |
433 | return ERR_PTR(-ENOMEM); | |
434 | } | |
435 | ||
436 | INIT_LIST_HEAD(&device->dev_node); | |
437 | ||
438 | device->ib_device = cma_id->device; | |
439 | ret = isert_create_device_ib_res(device); | |
440 | if (ret) { | |
441 | kfree(device); | |
442 | mutex_unlock(&device_list_mutex); | |
443 | return ERR_PTR(ret); | |
444 | } | |
445 | ||
446 | device->refcount++; | |
447 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
448 | isert_info("Created a new iser device %p refcount %d\n", |
449 | device, device->refcount); | |
b8d26b3b NB |
450 | mutex_unlock(&device_list_mutex); |
451 | ||
452 | return device; | |
453 | } | |
454 | ||
59464ef4 | 455 | static void |
a3a5a826 | 456 | isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
457 | { |
458 | struct fast_reg_descriptor *fr_desc, *tmp; | |
459 | int i = 0; | |
460 | ||
dac6ab30 | 461 | if (list_empty(&isert_conn->fr_pool)) |
59464ef4 VP |
462 | return; |
463 | ||
4c22e07f | 464 | isert_info("Freeing conn %p fastreg pool", isert_conn); |
59464ef4 VP |
465 | |
466 | list_for_each_entry_safe(fr_desc, tmp, | |
dac6ab30 | 467 | &isert_conn->fr_pool, list) { |
59464ef4 | 468 | list_del(&fr_desc->list); |
59464ef4 | 469 | ib_dereg_mr(fr_desc->data_mr); |
d3e125da | 470 | if (fr_desc->pi_ctx) { |
d3e125da | 471 | ib_dereg_mr(fr_desc->pi_ctx->prot_mr); |
8b91ffc1 | 472 | ib_dereg_mr(fr_desc->pi_ctx->sig_mr); |
d3e125da SG |
473 | kfree(fr_desc->pi_ctx); |
474 | } | |
59464ef4 VP |
475 | kfree(fr_desc); |
476 | ++i; | |
477 | } | |
478 | ||
dac6ab30 | 479 | if (i < isert_conn->fr_pool_size) |
24f412dd | 480 | isert_warn("Pool still has %d regions registered\n", |
dac6ab30 | 481 | isert_conn->fr_pool_size - i); |
59464ef4 VP |
482 | } |
483 | ||
570db170 SG |
484 | static int |
485 | isert_create_pi_ctx(struct fast_reg_descriptor *desc, | |
486 | struct ib_device *device, | |
487 | struct ib_pd *pd) | |
488 | { | |
570db170 SG |
489 | struct pi_context *pi_ctx; |
490 | int ret; | |
491 | ||
492 | pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL); | |
493 | if (!pi_ctx) { | |
24f412dd | 494 | isert_err("Failed to allocate pi context\n"); |
570db170 SG |
495 | return -ENOMEM; |
496 | } | |
497 | ||
a89be2cc SG |
498 | pi_ctx->prot_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, |
499 | ISCSI_ISER_SG_TABLESIZE); | |
570db170 | 500 | if (IS_ERR(pi_ctx->prot_mr)) { |
24f412dd | 501 | isert_err("Failed to allocate prot frmr err=%ld\n", |
570db170 SG |
502 | PTR_ERR(pi_ctx->prot_mr)); |
503 | ret = PTR_ERR(pi_ctx->prot_mr); | |
16c2d702 | 504 | goto err_pi_ctx; |
570db170 SG |
505 | } |
506 | desc->ind |= ISERT_PROT_KEY_VALID; | |
507 | ||
9bee178b | 508 | pi_ctx->sig_mr = ib_alloc_mr(pd, IB_MR_TYPE_SIGNATURE, 2); |
570db170 | 509 | if (IS_ERR(pi_ctx->sig_mr)) { |
24f412dd | 510 | isert_err("Failed to allocate signature enabled mr err=%ld\n", |
570db170 SG |
511 | PTR_ERR(pi_ctx->sig_mr)); |
512 | ret = PTR_ERR(pi_ctx->sig_mr); | |
513 | goto err_prot_mr; | |
514 | } | |
515 | ||
516 | desc->pi_ctx = pi_ctx; | |
517 | desc->ind |= ISERT_SIG_KEY_VALID; | |
518 | desc->ind &= ~ISERT_PROTECTED; | |
519 | ||
520 | return 0; | |
521 | ||
522 | err_prot_mr: | |
b2feda4f | 523 | ib_dereg_mr(pi_ctx->prot_mr); |
570db170 | 524 | err_pi_ctx: |
b2feda4f | 525 | kfree(pi_ctx); |
570db170 SG |
526 | |
527 | return ret; | |
528 | } | |
529 | ||
dc87a90f SG |
530 | static int |
531 | isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, | |
570db170 | 532 | struct fast_reg_descriptor *fr_desc) |
dc87a90f | 533 | { |
a89be2cc SG |
534 | fr_desc->data_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, |
535 | ISCSI_ISER_SG_TABLESIZE); | |
dc87a90f | 536 | if (IS_ERR(fr_desc->data_mr)) { |
24f412dd | 537 | isert_err("Failed to allocate data frmr err=%ld\n", |
4c22e07f | 538 | PTR_ERR(fr_desc->data_mr)); |
16c2d702 | 539 | return PTR_ERR(fr_desc->data_mr); |
dc87a90f | 540 | } |
d3e125da SG |
541 | fr_desc->ind |= ISERT_DATA_KEY_VALID; |
542 | ||
24f412dd | 543 | isert_dbg("Created fr_desc %p\n", fr_desc); |
dc87a90f SG |
544 | |
545 | return 0; | |
59464ef4 VP |
546 | } |
547 | ||
548 | static int | |
570db170 | 549 | isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
550 | { |
551 | struct fast_reg_descriptor *fr_desc; | |
dac6ab30 | 552 | struct isert_device *device = isert_conn->device; |
f46d6a8a NB |
553 | struct se_session *se_sess = isert_conn->conn->sess->se_sess; |
554 | struct se_node_acl *se_nacl = se_sess->se_node_acl; | |
555 | int i, ret, tag_num; | |
556 | /* | |
557 | * Setup the number of FRMRs based upon the number of tags | |
558 | * available to session in iscsi_target_locate_portal(). | |
559 | */ | |
560 | tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth); | |
561 | tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; | |
59464ef4 | 562 | |
dac6ab30 | 563 | isert_conn->fr_pool_size = 0; |
f46d6a8a | 564 | for (i = 0; i < tag_num; i++) { |
59464ef4 VP |
565 | fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); |
566 | if (!fr_desc) { | |
24f412dd | 567 | isert_err("Failed to allocate fast_reg descriptor\n"); |
59464ef4 VP |
568 | ret = -ENOMEM; |
569 | goto err; | |
570 | } | |
571 | ||
dc87a90f | 572 | ret = isert_create_fr_desc(device->ib_device, |
67cb3949 | 573 | device->pd, fr_desc); |
dc87a90f | 574 | if (ret) { |
24f412dd | 575 | isert_err("Failed to create fastreg descriptor err=%d\n", |
dc87a90f | 576 | ret); |
a80e21b3 | 577 | kfree(fr_desc); |
59464ef4 VP |
578 | goto err; |
579 | } | |
59464ef4 | 580 | |
dac6ab30 SG |
581 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); |
582 | isert_conn->fr_pool_size++; | |
59464ef4 VP |
583 | } |
584 | ||
24f412dd | 585 | isert_dbg("Creating conn %p fastreg pool size=%d", |
dac6ab30 | 586 | isert_conn, isert_conn->fr_pool_size); |
59464ef4 VP |
587 | |
588 | return 0; | |
589 | ||
590 | err: | |
a3a5a826 | 591 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 VP |
592 | return ret; |
593 | } | |
594 | ||
ae9ea9ed SG |
595 | static void |
596 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 597 | { |
b8d26b3b | 598 | isert_conn->state = ISER_CONN_INIT; |
bd379220 | 599 | INIT_LIST_HEAD(&isert_conn->node); |
dac6ab30 | 600 | init_completion(&isert_conn->login_comp); |
2371e5da | 601 | init_completion(&isert_conn->login_req_comp); |
dac6ab30 SG |
602 | init_completion(&isert_conn->wait); |
603 | kref_init(&isert_conn->kref); | |
604 | mutex_init(&isert_conn->mutex); | |
605 | spin_lock_init(&isert_conn->pool_lock); | |
606 | INIT_LIST_HEAD(&isert_conn->fr_pool); | |
2f1b6b7d | 607 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
ae9ea9ed | 608 | } |
b8d26b3b | 609 | |
ae9ea9ed SG |
610 | static void |
611 | isert_free_login_buf(struct isert_conn *isert_conn) | |
612 | { | |
dac6ab30 | 613 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
614 | |
615 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
616 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
617 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
618 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
619 | DMA_FROM_DEVICE); | |
620 | kfree(isert_conn->login_buf); | |
621 | } | |
622 | ||
623 | static int | |
624 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
625 | struct ib_device *ib_dev) | |
626 | { | |
627 | int ret; | |
b8d26b3b NB |
628 | |
629 | isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + | |
630 | ISER_RX_LOGIN_SIZE, GFP_KERNEL); | |
631 | if (!isert_conn->login_buf) { | |
24f412dd | 632 | isert_err("Unable to allocate isert_conn->login_buf\n"); |
ae9ea9ed | 633 | return -ENOMEM; |
b8d26b3b NB |
634 | } |
635 | ||
636 | isert_conn->login_req_buf = isert_conn->login_buf; | |
637 | isert_conn->login_rsp_buf = isert_conn->login_buf + | |
638 | ISCSI_DEF_MAX_RECV_SEG_LEN; | |
ae9ea9ed | 639 | |
24f412dd | 640 | isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", |
b8d26b3b NB |
641 | isert_conn->login_buf, isert_conn->login_req_buf, |
642 | isert_conn->login_rsp_buf); | |
643 | ||
644 | isert_conn->login_req_dma = ib_dma_map_single(ib_dev, | |
645 | (void *)isert_conn->login_req_buf, | |
646 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
647 | ||
648 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); | |
649 | if (ret) { | |
ae9ea9ed | 650 | isert_err("login_req_dma mapping error: %d\n", ret); |
b8d26b3b NB |
651 | isert_conn->login_req_dma = 0; |
652 | goto out_login_buf; | |
653 | } | |
654 | ||
655 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
656 | (void *)isert_conn->login_rsp_buf, | |
657 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
658 | ||
659 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); | |
660 | if (ret) { | |
ae9ea9ed | 661 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b NB |
662 | isert_conn->login_rsp_dma = 0; |
663 | goto out_req_dma_map; | |
664 | } | |
665 | ||
ae9ea9ed SG |
666 | return 0; |
667 | ||
668 | out_req_dma_map: | |
669 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
670 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
671 | out_login_buf: | |
672 | kfree(isert_conn->login_buf); | |
673 | return ret; | |
674 | } | |
675 | ||
676 | static int | |
677 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
678 | { | |
679 | struct isert_np *isert_np = cma_id->context; | |
680 | struct iscsi_np *np = isert_np->np; | |
681 | struct isert_conn *isert_conn; | |
682 | struct isert_device *device; | |
683 | int ret = 0; | |
684 | ||
685 | spin_lock_bh(&np->np_thread_lock); | |
686 | if (!np->enabled) { | |
687 | spin_unlock_bh(&np->np_thread_lock); | |
688 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
689 | return rdma_reject(cma_id, NULL, 0); | |
690 | } | |
691 | spin_unlock_bh(&np->np_thread_lock); | |
692 | ||
693 | isert_dbg("cma_id: %p, portal: %p\n", | |
694 | cma_id, cma_id->context); | |
695 | ||
696 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
697 | if (!isert_conn) | |
698 | return -ENOMEM; | |
699 | ||
700 | isert_init_conn(isert_conn); | |
dac6ab30 | 701 | isert_conn->cm_id = cma_id; |
ae9ea9ed SG |
702 | |
703 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); | |
704 | if (ret) | |
705 | goto out; | |
706 | ||
cf8ae958 | 707 | device = isert_device_get(cma_id); |
b8d26b3b NB |
708 | if (IS_ERR(device)) { |
709 | ret = PTR_ERR(device); | |
710 | goto out_rsp_dma_map; | |
711 | } | |
dac6ab30 | 712 | isert_conn->device = device; |
b8d26b3b | 713 | |
1a92e17e SG |
714 | /* Set max inflight RDMA READ requests */ |
715 | isert_conn->initiator_depth = min_t(u8, | |
716 | event->param.conn.initiator_depth, | |
717 | device->dev_attr.max_qp_init_rd_atom); | |
24f412dd | 718 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); |
1a92e17e | 719 | |
570db170 | 720 | ret = isert_conn_setup_qp(isert_conn, cma_id); |
b8d26b3b NB |
721 | if (ret) |
722 | goto out_conn_dev; | |
723 | ||
2371e5da SG |
724 | ret = isert_rdma_post_recvl(isert_conn); |
725 | if (ret) | |
726 | goto out_conn_dev; | |
727 | ||
728 | ret = isert_rdma_accept(isert_conn); | |
729 | if (ret) | |
730 | goto out_conn_dev; | |
731 | ||
ed8cb0a4 | 732 | mutex_lock(&isert_np->mutex); |
bd379220 | 733 | list_add_tail(&isert_conn->node, &isert_np->accepted); |
ed8cb0a4 | 734 | mutex_unlock(&isert_np->mutex); |
b8d26b3b | 735 | |
b8d26b3b NB |
736 | return 0; |
737 | ||
738 | out_conn_dev: | |
cf8ae958 | 739 | isert_device_put(device); |
b8d26b3b | 740 | out_rsp_dma_map: |
ae9ea9ed | 741 | isert_free_login_buf(isert_conn); |
b8d26b3b NB |
742 | out: |
743 | kfree(isert_conn); | |
2371e5da | 744 | rdma_reject(cma_id, NULL, 0); |
b8d26b3b NB |
745 | return ret; |
746 | } | |
747 | ||
748 | static void | |
749 | isert_connect_release(struct isert_conn *isert_conn) | |
750 | { | |
dac6ab30 | 751 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 752 | |
4c22e07f | 753 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 754 | |
57df81e3 SG |
755 | BUG_ON(!device); |
756 | ||
757 | if (device->use_fastreg) | |
a3a5a826 | 758 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 | 759 | |
19e2090f | 760 | isert_free_rx_descriptors(isert_conn); |
dac6ab30 SG |
761 | if (isert_conn->cm_id) |
762 | rdma_destroy_id(isert_conn->cm_id); | |
19e2090f | 763 | |
dac6ab30 SG |
764 | if (isert_conn->qp) { |
765 | struct isert_comp *comp = isert_conn->qp->recv_cq->cq_context; | |
4a295bae | 766 | |
40fc069a | 767 | isert_comp_put(comp); |
dac6ab30 | 768 | ib_destroy_qp(isert_conn->qp); |
b8d26b3b NB |
769 | } |
770 | ||
ae9ea9ed SG |
771 | if (isert_conn->login_buf) |
772 | isert_free_login_buf(isert_conn); | |
773 | ||
57df81e3 | 774 | isert_device_put(device); |
b8d26b3b | 775 | |
57df81e3 | 776 | kfree(isert_conn); |
b8d26b3b NB |
777 | } |
778 | ||
779 | static void | |
780 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
781 | { | |
19e2090f | 782 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
bd379220 | 783 | struct isert_np *isert_np = cma_id->context; |
c2f88b17 | 784 | |
24f412dd | 785 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 786 | |
dac6ab30 | 787 | mutex_lock(&isert_conn->mutex); |
bd379220 JD |
788 | isert_conn->state = ISER_CONN_UP; |
789 | kref_get(&isert_conn->kref); | |
dac6ab30 | 790 | mutex_unlock(&isert_conn->mutex); |
bd379220 JD |
791 | |
792 | mutex_lock(&isert_np->mutex); | |
793 | list_move_tail(&isert_conn->node, &isert_np->pending); | |
794 | mutex_unlock(&isert_np->mutex); | |
795 | ||
796 | isert_info("np %p: Allow accept_np to continue\n", isert_np); | |
797 | up(&isert_np->sem); | |
b8d26b3b NB |
798 | } |
799 | ||
800 | static void | |
dac6ab30 | 801 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
802 | { |
803 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 804 | struct isert_conn, kref); |
b8d26b3b | 805 | |
4c22e07f SG |
806 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
807 | current->pid); | |
b8d26b3b NB |
808 | |
809 | isert_connect_release(isert_conn); | |
810 | } | |
811 | ||
812 | static void | |
813 | isert_put_conn(struct isert_conn *isert_conn) | |
814 | { | |
dac6ab30 | 815 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
816 | } |
817 | ||
954f2372 SG |
818 | /** |
819 | * isert_conn_terminate() - Initiate connection termination | |
820 | * @isert_conn: isert connection struct | |
821 | * | |
822 | * Notes: | |
128e9cc8 | 823 | * In case the connection state is FULL_FEATURE, move state |
954f2372 | 824 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 825 | * In case the connection state is UP, complete flush as well. |
954f2372 | 826 | * |
dac6ab30 | 827 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
828 | * safe to call multiple times. |
829 | */ | |
830 | static void | |
831 | isert_conn_terminate(struct isert_conn *isert_conn) | |
832 | { | |
833 | int err; | |
834 | ||
128e9cc8 SG |
835 | switch (isert_conn->state) { |
836 | case ISER_CONN_TERMINATING: | |
837 | break; | |
838 | case ISER_CONN_UP: | |
128e9cc8 | 839 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ |
24f412dd | 840 | isert_info("Terminating conn %p state %d\n", |
954f2372 | 841 | isert_conn, isert_conn->state); |
128e9cc8 | 842 | isert_conn->state = ISER_CONN_TERMINATING; |
dac6ab30 | 843 | err = rdma_disconnect(isert_conn->cm_id); |
954f2372 | 844 | if (err) |
24f412dd | 845 | isert_warn("Failed rdma_disconnect isert_conn %p\n", |
954f2372 | 846 | isert_conn); |
128e9cc8 SG |
847 | break; |
848 | default: | |
24f412dd | 849 | isert_warn("conn %p teminating in state %d\n", |
128e9cc8 | 850 | isert_conn, isert_conn->state); |
954f2372 SG |
851 | } |
852 | } | |
853 | ||
3b726ae2 | 854 | static int |
ca6c1d82 SG |
855 | isert_np_cma_handler(struct isert_np *isert_np, |
856 | enum rdma_cm_event_type event) | |
b8d26b3b | 857 | { |
ea8a1616 SG |
858 | isert_dbg("%s (%d): isert np %p\n", |
859 | rdma_event_msg(event), event, isert_np); | |
3b726ae2 | 860 | |
ca6c1d82 SG |
861 | switch (event) { |
862 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
ed8cb0a4 | 863 | isert_np->cm_id = NULL; |
ca6c1d82 SG |
864 | break; |
865 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
ed8cb0a4 JD |
866 | isert_np->cm_id = isert_setup_id(isert_np); |
867 | if (IS_ERR(isert_np->cm_id)) { | |
24f412dd | 868 | isert_err("isert np %p setup id failed: %ld\n", |
ed8cb0a4 JD |
869 | isert_np, PTR_ERR(isert_np->cm_id)); |
870 | isert_np->cm_id = NULL; | |
ca6c1d82 SG |
871 | } |
872 | break; | |
873 | default: | |
24f412dd | 874 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 875 | isert_np, event); |
3b726ae2 SG |
876 | } |
877 | ||
ca6c1d82 SG |
878 | return -1; |
879 | } | |
880 | ||
881 | static int | |
882 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
883 | enum rdma_cm_event_type event) | |
884 | { | |
885 | struct isert_np *isert_np = cma_id->context; | |
886 | struct isert_conn *isert_conn; | |
2f1b6b7d | 887 | bool terminating = false; |
ca6c1d82 | 888 | |
ed8cb0a4 | 889 | if (isert_np->cm_id == cma_id) |
ca6c1d82 SG |
890 | return isert_np_cma_handler(cma_id->context, event); |
891 | ||
19e2090f | 892 | isert_conn = cma_id->qp->qp_context; |
b8d26b3b | 893 | |
dac6ab30 | 894 | mutex_lock(&isert_conn->mutex); |
2f1b6b7d | 895 | terminating = (isert_conn->state == ISER_CONN_TERMINATING); |
128e9cc8 | 896 | isert_conn_terminate(isert_conn); |
dac6ab30 | 897 | mutex_unlock(&isert_conn->mutex); |
128e9cc8 | 898 | |
dac6ab30 SG |
899 | isert_info("conn %p completing wait\n", isert_conn); |
900 | complete(&isert_conn->wait); | |
3b726ae2 | 901 | |
2f1b6b7d SG |
902 | if (terminating) |
903 | goto out; | |
904 | ||
ed8cb0a4 | 905 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
906 | if (!list_empty(&isert_conn->node)) { |
907 | list_del_init(&isert_conn->node); | |
2f1b6b7d SG |
908 | isert_put_conn(isert_conn); |
909 | queue_work(isert_release_wq, &isert_conn->release_work); | |
910 | } | |
ed8cb0a4 | 911 | mutex_unlock(&isert_np->mutex); |
2f1b6b7d SG |
912 | |
913 | out: | |
3b726ae2 | 914 | return 0; |
b8d26b3b NB |
915 | } |
916 | ||
4a579da2 | 917 | static int |
954f2372 SG |
918 | isert_connect_error(struct rdma_cm_id *cma_id) |
919 | { | |
19e2090f | 920 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
954f2372 | 921 | |
bd379220 | 922 | list_del_init(&isert_conn->node); |
dac6ab30 | 923 | isert_conn->cm_id = NULL; |
954f2372 | 924 | isert_put_conn(isert_conn); |
4a579da2 SG |
925 | |
926 | return -1; | |
954f2372 SG |
927 | } |
928 | ||
b8d26b3b NB |
929 | static int |
930 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
931 | { | |
932 | int ret = 0; | |
933 | ||
ea8a1616 SG |
934 | isert_info("%s (%d): status %d id %p np %p\n", |
935 | rdma_event_msg(event->event), event->event, | |
4c22e07f | 936 | event->status, cma_id, cma_id->context); |
b8d26b3b NB |
937 | |
938 | switch (event->event) { | |
939 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
b8d26b3b | 940 | ret = isert_connect_request(cma_id, event); |
3b726ae2 | 941 | if (ret) |
4c22e07f | 942 | isert_err("failed handle connect request %d\n", ret); |
b8d26b3b NB |
943 | break; |
944 | case RDMA_CM_EVENT_ESTABLISHED: | |
b8d26b3b NB |
945 | isert_connected_handler(cma_id); |
946 | break; | |
88c4015f SG |
947 | case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ |
948 | case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ | |
949 | case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */ | |
88c4015f | 950 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 951 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 952 | break; |
954f2372 SG |
953 | case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ |
954 | case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ | |
b8d26b3b | 955 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 956 | ret = isert_connect_error(cma_id); |
954f2372 | 957 | break; |
b8d26b3b | 958 | default: |
24f412dd | 959 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
960 | break; |
961 | } | |
962 | ||
b8d26b3b NB |
963 | return ret; |
964 | } | |
965 | ||
966 | static int | |
4366b19c | 967 | isert_post_recvm(struct isert_conn *isert_conn, u32 count) |
b8d26b3b NB |
968 | { |
969 | struct ib_recv_wr *rx_wr, *rx_wr_failed; | |
970 | int i, ret; | |
b8d26b3b NB |
971 | struct iser_rx_desc *rx_desc; |
972 | ||
dac6ab30 | 973 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
4366b19c JD |
974 | rx_desc = &isert_conn->rx_descs[i]; |
975 | rx_wr->wr_id = (uintptr_t)rx_desc; | |
976 | rx_wr->sg_list = &rx_desc->rx_sg; | |
977 | rx_wr->num_sge = 1; | |
978 | rx_wr->next = rx_wr + 1; | |
b8d26b3b | 979 | } |
b8d26b3b NB |
980 | rx_wr--; |
981 | rx_wr->next = NULL; /* mark end of work requests list */ | |
982 | ||
983 | isert_conn->post_recv_buf_count += count; | |
dac6ab30 | 984 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, |
4366b19c | 985 | &rx_wr_failed); |
b8d26b3b | 986 | if (ret) { |
24f412dd | 987 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
b8d26b3b | 988 | isert_conn->post_recv_buf_count -= count; |
b8d26b3b | 989 | } |
4366b19c JD |
990 | |
991 | return ret; | |
992 | } | |
993 | ||
994 | static int | |
995 | isert_post_recv(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc) | |
996 | { | |
997 | struct ib_recv_wr *rx_wr_failed, rx_wr; | |
998 | int ret; | |
999 | ||
1000 | rx_wr.wr_id = (uintptr_t)rx_desc; | |
1001 | rx_wr.sg_list = &rx_desc->rx_sg; | |
1002 | rx_wr.num_sge = 1; | |
1003 | rx_wr.next = NULL; | |
1004 | ||
1005 | isert_conn->post_recv_buf_count++; | |
1006 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_failed); | |
1007 | if (ret) { | |
1008 | isert_err("ib_post_recv() failed with ret: %d\n", ret); | |
1009 | isert_conn->post_recv_buf_count--; | |
1010 | } | |
1011 | ||
b8d26b3b NB |
1012 | return ret; |
1013 | } | |
1014 | ||
1015 | static int | |
1016 | isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) | |
1017 | { | |
dac6ab30 | 1018 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1019 | struct ib_send_wr send_wr, *send_wr_failed; |
1020 | int ret; | |
1021 | ||
1022 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
1023 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1024 | ||
1025 | send_wr.next = NULL; | |
b0a191e7 | 1026 | send_wr.wr_id = (uintptr_t)tx_desc; |
b8d26b3b NB |
1027 | send_wr.sg_list = tx_desc->tx_sg; |
1028 | send_wr.num_sge = tx_desc->num_sge; | |
1029 | send_wr.opcode = IB_WR_SEND; | |
1030 | send_wr.send_flags = IB_SEND_SIGNALED; | |
1031 | ||
dac6ab30 | 1032 | ret = ib_post_send(isert_conn->qp, &send_wr, &send_wr_failed); |
bdf20e72 | 1033 | if (ret) |
24f412dd | 1034 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
1035 | |
1036 | return ret; | |
1037 | } | |
1038 | ||
1039 | static void | |
1040 | isert_create_send_desc(struct isert_conn *isert_conn, | |
1041 | struct isert_cmd *isert_cmd, | |
1042 | struct iser_tx_desc *tx_desc) | |
1043 | { | |
dac6ab30 | 1044 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1045 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1046 | |
1047 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
1048 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1049 | ||
1050 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); | |
1051 | tx_desc->iser_header.flags = ISER_VER; | |
1052 | ||
1053 | tx_desc->num_sge = 1; | |
1054 | tx_desc->isert_cmd = isert_cmd; | |
1055 | ||
34efc7df JG |
1056 | if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) { |
1057 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; | |
24f412dd | 1058 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
1059 | } |
1060 | } | |
1061 | ||
1062 | static int | |
1063 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
1064 | struct iser_tx_desc *tx_desc) | |
1065 | { | |
dac6ab30 | 1066 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1067 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1068 | u64 dma_addr; |
1069 | ||
1070 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
1071 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1072 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 1073 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
1074 | return -ENOMEM; |
1075 | } | |
1076 | ||
1077 | tx_desc->dma_addr = dma_addr; | |
1078 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
1079 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
34efc7df | 1080 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; |
b8d26b3b | 1081 | |
4c22e07f SG |
1082 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
1083 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
1084 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
1085 | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | static void | |
95b60f07 | 1090 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 1091 | struct ib_send_wr *send_wr) |
b8d26b3b | 1092 | { |
95b60f07 NB |
1093 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
1094 | ||
b8d26b3b | 1095 | isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; |
b0a191e7 | 1096 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
b8d26b3b | 1097 | send_wr->opcode = IB_WR_SEND; |
95b60f07 | 1098 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 1099 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 1100 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
1101 | } |
1102 | ||
1103 | static int | |
1104 | isert_rdma_post_recvl(struct isert_conn *isert_conn) | |
1105 | { | |
1106 | struct ib_recv_wr rx_wr, *rx_wr_fail; | |
1107 | struct ib_sge sge; | |
1108 | int ret; | |
1109 | ||
1110 | memset(&sge, 0, sizeof(struct ib_sge)); | |
1111 | sge.addr = isert_conn->login_req_dma; | |
1112 | sge.length = ISER_RX_LOGIN_SIZE; | |
34efc7df | 1113 | sge.lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b | 1114 | |
24f412dd | 1115 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
1116 | sge.addr, sge.length, sge.lkey); |
1117 | ||
1118 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); | |
b0a191e7 | 1119 | rx_wr.wr_id = (uintptr_t)isert_conn->login_req_buf; |
b8d26b3b NB |
1120 | rx_wr.sg_list = &sge; |
1121 | rx_wr.num_sge = 1; | |
1122 | ||
1123 | isert_conn->post_recv_buf_count++; | |
dac6ab30 | 1124 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_fail); |
b8d26b3b | 1125 | if (ret) { |
24f412dd | 1126 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b NB |
1127 | isert_conn->post_recv_buf_count--; |
1128 | } | |
1129 | ||
b8d26b3b NB |
1130 | return ret; |
1131 | } | |
1132 | ||
1133 | static int | |
1134 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1135 | u32 length) | |
1136 | { | |
1137 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 1138 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1139 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 1140 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
1141 | int ret; |
1142 | ||
1143 | isert_create_send_desc(isert_conn, NULL, tx_desc); | |
1144 | ||
1145 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
1146 | sizeof(struct iscsi_hdr)); | |
1147 | ||
1148 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
1149 | ||
1150 | if (length > 0) { | |
1151 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
1152 | ||
1153 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
1154 | length, DMA_TO_DEVICE); | |
1155 | ||
1156 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
1157 | ||
1158 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
1159 | length, DMA_TO_DEVICE); | |
1160 | ||
1161 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
1162 | tx_dsg->length = length; | |
34efc7df | 1163 | tx_dsg->lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b NB |
1164 | tx_desc->num_sge = 2; |
1165 | } | |
1166 | if (!login->login_failed) { | |
1167 | if (login->login_complete) { | |
e0546fc1 | 1168 | if (!conn->sess->sess_ops->SessionType && |
dac6ab30 | 1169 | isert_conn->device->use_fastreg) { |
570db170 | 1170 | ret = isert_conn_create_fastreg_pool(isert_conn); |
f46d6a8a | 1171 | if (ret) { |
24f412dd | 1172 | isert_err("Conn: %p failed to create" |
f46d6a8a NB |
1173 | " fastreg pool\n", isert_conn); |
1174 | return ret; | |
1175 | } | |
1176 | } | |
1177 | ||
b8d26b3b NB |
1178 | ret = isert_alloc_rx_descriptors(isert_conn); |
1179 | if (ret) | |
1180 | return ret; | |
1181 | ||
4366b19c JD |
1182 | ret = isert_post_recvm(isert_conn, |
1183 | ISERT_QP_MAX_RECV_DTOS); | |
b8d26b3b NB |
1184 | if (ret) |
1185 | return ret; | |
1186 | ||
128e9cc8 | 1187 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 1188 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 1189 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 1190 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
1191 | goto post_send; |
1192 | } | |
1193 | ||
1194 | ret = isert_rdma_post_recvl(isert_conn); | |
1195 | if (ret) | |
1196 | return ret; | |
1197 | } | |
1198 | post_send: | |
1199 | ret = isert_post_send(isert_conn, tx_desc); | |
1200 | if (ret) | |
1201 | return ret; | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | static void | |
2371e5da | 1207 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 1208 | { |
2371e5da SG |
1209 | struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf; |
1210 | int rx_buflen = isert_conn->login_req_len; | |
b8d26b3b NB |
1211 | struct iscsi_conn *conn = isert_conn->conn; |
1212 | struct iscsi_login *login = conn->conn_login; | |
1213 | int size; | |
1214 | ||
24f412dd | 1215 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
1216 | |
1217 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
1218 | |
1219 | if (login->first_request) { | |
1220 | struct iscsi_login_req *login_req = | |
1221 | (struct iscsi_login_req *)&rx_desc->iscsi_header; | |
1222 | /* | |
1223 | * Setup the initial iscsi_login values from the leading | |
1224 | * login request PDU. | |
1225 | */ | |
1226 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
1227 | login->current_stage = | |
1228 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
1229 | >> 2; | |
1230 | login->version_min = login_req->min_version; | |
1231 | login->version_max = login_req->max_version; | |
1232 | memcpy(login->isid, login_req->isid, 6); | |
1233 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1234 | login->init_task_tag = login_req->itt; | |
1235 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1236 | login->cid = be16_to_cpu(login_req->cid); | |
1237 | login->tsih = be16_to_cpu(login_req->tsih); | |
1238 | } | |
1239 | ||
1240 | memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); | |
1241 | ||
1242 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1243 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1244 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1245 | MAX_KEY_VALUE_PAIRS); | |
b8d26b3b NB |
1246 | memcpy(login->req_buf, &rx_desc->data[0], size); |
1247 | ||
6faaa85f | 1248 | if (login->first_request) { |
dac6ab30 | 1249 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1250 | return; |
1251 | } | |
1252 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1253 | } |
1254 | ||
b8d26b3b | 1255 | static struct iscsi_cmd |
4366b19c | 1256 | *isert_allocate_cmd(struct iscsi_conn *conn, struct iser_rx_desc *rx_desc) |
b8d26b3b | 1257 | { |
6700425e | 1258 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1259 | struct isert_cmd *isert_cmd; |
d703ce2f | 1260 | struct iscsi_cmd *cmd; |
b8d26b3b | 1261 | |
676687c6 | 1262 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1263 | if (!cmd) { |
24f412dd | 1264 | isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); |
b8d26b3b NB |
1265 | return NULL; |
1266 | } | |
d703ce2f | 1267 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1268 | isert_cmd->conn = isert_conn; |
d703ce2f | 1269 | isert_cmd->iscsi_cmd = cmd; |
4366b19c | 1270 | isert_cmd->rx_desc = rx_desc; |
b8d26b3b | 1271 | |
d703ce2f | 1272 | return cmd; |
b8d26b3b NB |
1273 | } |
1274 | ||
1275 | static int | |
1276 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1277 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1278 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1279 | { |
b8d26b3b NB |
1280 | struct iscsi_conn *conn = isert_conn->conn; |
1281 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
b8d26b3b NB |
1282 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; |
1283 | bool dump_payload = false; | |
9fd60088 | 1284 | unsigned int data_len; |
b8d26b3b NB |
1285 | |
1286 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1287 | if (rc < 0) | |
1288 | return rc; | |
1289 | ||
1290 | imm_data = cmd->immediate_data; | |
1291 | imm_data_len = cmd->first_burst_len; | |
1292 | unsol_data = cmd->unsolicited_data; | |
9fd60088 | 1293 | data_len = cmd->se_cmd.data_length; |
b8d26b3b | 1294 | |
9fd60088 JD |
1295 | if (imm_data && imm_data_len == data_len) |
1296 | cmd->se_cmd.se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
b8d26b3b NB |
1297 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); |
1298 | if (rc < 0) { | |
1299 | return 0; | |
1300 | } else if (rc > 0) { | |
1301 | dump_payload = true; | |
1302 | goto sequence_cmd; | |
1303 | } | |
1304 | ||
1305 | if (!imm_data) | |
1306 | return 0; | |
1307 | ||
9fd60088 JD |
1308 | if (imm_data_len != data_len) { |
1309 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1310 | sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents, | |
1311 | &rx_desc->data[0], imm_data_len); | |
1312 | isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n", | |
1313 | sg_nents, imm_data_len); | |
1314 | } else { | |
1315 | sg_init_table(&isert_cmd->sg, 1); | |
1316 | cmd->se_cmd.t_data_sg = &isert_cmd->sg; | |
1317 | cmd->se_cmd.t_data_nents = 1; | |
1318 | sg_set_buf(&isert_cmd->sg, &rx_desc->data[0], imm_data_len); | |
1319 | isert_dbg("Transfer Immediate imm_data_len: %d\n", | |
1320 | imm_data_len); | |
1321 | } | |
b8d26b3b NB |
1322 | |
1323 | cmd->write_data_done += imm_data_len; | |
1324 | ||
1325 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1326 | spin_lock_bh(&cmd->istate_lock); | |
1327 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1328 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1329 | spin_unlock_bh(&cmd->istate_lock); | |
1330 | } | |
1331 | ||
1332 | sequence_cmd: | |
561bf158 | 1333 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b NB |
1334 | |
1335 | if (!rc && dump_payload == false && unsol_data) | |
1336 | iscsit_set_unsoliticed_dataout(cmd); | |
6cc44a6f | 1337 | else if (dump_payload && imm_data) |
afc16604 | 1338 | target_put_sess_cmd(&cmd->se_cmd); |
b8d26b3b | 1339 | |
b8d26b3b NB |
1340 | return 0; |
1341 | } | |
1342 | ||
1343 | static int | |
1344 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1345 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1346 | { | |
1347 | struct scatterlist *sg_start; | |
1348 | struct iscsi_conn *conn = isert_conn->conn; | |
1349 | struct iscsi_cmd *cmd = NULL; | |
1350 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1351 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1352 | int rc, sg_nents, sg_off, page_off; | |
1353 | ||
1354 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1355 | if (rc < 0) | |
1356 | return rc; | |
1357 | else if (!cmd) | |
1358 | return 0; | |
1359 | /* | |
1360 | * FIXME: Unexpected unsolicited_data out | |
1361 | */ | |
1362 | if (!cmd->unsolicited_data) { | |
24f412dd | 1363 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1364 | dump_stack(); |
1365 | return -1; | |
1366 | } | |
1367 | ||
4c22e07f SG |
1368 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1369 | "write_data_done: %u, data_length: %u\n", | |
1370 | unsol_data_len, cmd->write_data_done, | |
1371 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1372 | |
1373 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1374 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1375 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1376 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1377 | /* | |
1378 | * FIXME: Non page-aligned unsolicited_data out | |
1379 | */ | |
1380 | if (page_off) { | |
4c22e07f | 1381 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1382 | dump_stack(); |
1383 | return -1; | |
1384 | } | |
4c22e07f SG |
1385 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1386 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
1387 | sg_nents, &rx_desc->data[0], unsol_data_len); | |
b8d26b3b NB |
1388 | |
1389 | sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], | |
1390 | unsol_data_len); | |
1391 | ||
1392 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1393 | if (rc < 0) | |
1394 | return rc; | |
1395 | ||
4366b19c JD |
1396 | /* |
1397 | * multiple data-outs on the same command can arrive - | |
1398 | * so post the buffer before hand | |
1399 | */ | |
1400 | rc = isert_post_recv(isert_conn, rx_desc); | |
1401 | if (rc) { | |
1402 | isert_err("ib_post_recv failed with %d\n", rc); | |
1403 | return rc; | |
1404 | } | |
b8d26b3b NB |
1405 | return 0; |
1406 | } | |
1407 | ||
778de368 NB |
1408 | static int |
1409 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1410 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1411 | unsigned char *buf) | |
778de368 | 1412 | { |
778de368 NB |
1413 | struct iscsi_conn *conn = isert_conn->conn; |
1414 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1415 | int rc; | |
1416 | ||
1417 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1418 | if (rc < 0) | |
1419 | return rc; | |
1420 | /* | |
1421 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1422 | */ | |
1423 | ||
1424 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1425 | } | |
1426 | ||
adb54c29 NB |
1427 | static int |
1428 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1429 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1430 | struct iscsi_text *hdr) | |
adb54c29 | 1431 | { |
adb54c29 NB |
1432 | struct iscsi_conn *conn = isert_conn->conn; |
1433 | u32 payload_length = ntoh24(hdr->dlength); | |
1434 | int rc; | |
b44a2b67 | 1435 | unsigned char *text_in = NULL; |
adb54c29 NB |
1436 | |
1437 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1438 | if (rc < 0) | |
1439 | return rc; | |
1440 | ||
b44a2b67 SG |
1441 | if (payload_length) { |
1442 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
1443 | if (!text_in) { | |
1444 | isert_err("Unable to allocate text_in of payload_length: %u\n", | |
1445 | payload_length); | |
1446 | return -ENOMEM; | |
1447 | } | |
adb54c29 NB |
1448 | } |
1449 | cmd->text_in_ptr = text_in; | |
1450 | ||
1451 | memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); | |
1452 | ||
1453 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1454 | } | |
1455 | ||
b8d26b3b NB |
1456 | static int |
1457 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1458 | uint32_t read_stag, uint64_t read_va, | |
1459 | uint32_t write_stag, uint64_t write_va) | |
1460 | { | |
1461 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
1462 | struct iscsi_conn *conn = isert_conn->conn; | |
1463 | struct iscsi_cmd *cmd; | |
1464 | struct isert_cmd *isert_cmd; | |
1465 | int ret = -EINVAL; | |
1466 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1467 | ||
fb140271 | 1468 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1469 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1470 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1471 | " ignoring\n", opcode); |
ca40d24e NB |
1472 | return 0; |
1473 | } | |
1474 | ||
b8d26b3b NB |
1475 | switch (opcode) { |
1476 | case ISCSI_OP_SCSI_CMD: | |
4366b19c | 1477 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1478 | if (!cmd) |
1479 | break; | |
1480 | ||
d703ce2f | 1481 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1482 | isert_cmd->read_stag = read_stag; |
1483 | isert_cmd->read_va = read_va; | |
1484 | isert_cmd->write_stag = write_stag; | |
1485 | isert_cmd->write_va = write_va; | |
1486 | ||
d703ce2f | 1487 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1488 | rx_desc, (unsigned char *)hdr); |
1489 | break; | |
1490 | case ISCSI_OP_NOOP_OUT: | |
4366b19c | 1491 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1492 | if (!cmd) |
1493 | break; | |
1494 | ||
d703ce2f NB |
1495 | isert_cmd = iscsit_priv_cmd(cmd); |
1496 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1497 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1498 | break; |
1499 | case ISCSI_OP_SCSI_DATA_OUT: | |
1500 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1501 | (unsigned char *)hdr); | |
1502 | break; | |
1503 | case ISCSI_OP_SCSI_TMFUNC: | |
4366b19c | 1504 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1505 | if (!cmd) |
1506 | break; | |
1507 | ||
1508 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1509 | (unsigned char *)hdr); | |
1510 | break; | |
1511 | case ISCSI_OP_LOGOUT: | |
4366b19c | 1512 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1513 | if (!cmd) |
1514 | break; | |
1515 | ||
1516 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1517 | break; |
adb54c29 | 1518 | case ISCSI_OP_TEXT: |
4366b19c | 1519 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) |
e4f4e801 | 1520 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); |
4366b19c JD |
1521 | else |
1522 | cmd = isert_allocate_cmd(conn, rx_desc); | |
1523 | ||
1524 | if (!cmd) | |
1525 | break; | |
adb54c29 | 1526 | |
d703ce2f NB |
1527 | isert_cmd = iscsit_priv_cmd(cmd); |
1528 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1529 | rx_desc, (struct iscsi_text *)hdr); |
1530 | break; | |
b8d26b3b | 1531 | default: |
24f412dd | 1532 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1533 | dump_stack(); |
1534 | break; | |
1535 | } | |
1536 | ||
1537 | return ret; | |
1538 | } | |
1539 | ||
1540 | static void | |
1541 | isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) | |
1542 | { | |
1543 | struct iser_hdr *iser_hdr = &rx_desc->iser_header; | |
1544 | uint64_t read_va = 0, write_va = 0; | |
1545 | uint32_t read_stag = 0, write_stag = 0; | |
b8d26b3b NB |
1546 | |
1547 | switch (iser_hdr->flags & 0xF0) { | |
1548 | case ISCSI_CTRL: | |
1549 | if (iser_hdr->flags & ISER_RSV) { | |
1550 | read_stag = be32_to_cpu(iser_hdr->read_stag); | |
1551 | read_va = be64_to_cpu(iser_hdr->read_va); | |
4c22e07f SG |
1552 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1553 | read_stag, (unsigned long long)read_va); | |
b8d26b3b NB |
1554 | } |
1555 | if (iser_hdr->flags & ISER_WSV) { | |
1556 | write_stag = be32_to_cpu(iser_hdr->write_stag); | |
1557 | write_va = be64_to_cpu(iser_hdr->write_va); | |
4c22e07f SG |
1558 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1559 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1560 | } |
1561 | ||
24f412dd | 1562 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1563 | break; |
1564 | case ISER_HELLO: | |
24f412dd | 1565 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1566 | break; |
1567 | default: | |
24f412dd | 1568 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags); |
b8d26b3b NB |
1569 | break; |
1570 | } | |
1571 | ||
6c760b3d BVA |
1572 | isert_rx_opcode(isert_conn, rx_desc, |
1573 | read_stag, read_va, write_stag, write_va); | |
b8d26b3b NB |
1574 | } |
1575 | ||
1576 | static void | |
7748681b SG |
1577 | isert_rcv_completion(struct iser_rx_desc *desc, |
1578 | struct isert_conn *isert_conn, | |
1579 | u32 xfer_len) | |
b8d26b3b | 1580 | { |
dac6ab30 | 1581 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1582 | struct iscsi_hdr *hdr; |
1583 | u64 rx_dma; | |
4366b19c | 1584 | int rx_buflen; |
b8d26b3b NB |
1585 | |
1586 | if ((char *)desc == isert_conn->login_req_buf) { | |
1587 | rx_dma = isert_conn->login_req_dma; | |
1588 | rx_buflen = ISER_RX_LOGIN_SIZE; | |
4c22e07f | 1589 | isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1590 | rx_dma, rx_buflen); |
1591 | } else { | |
1592 | rx_dma = desc->dma_addr; | |
1593 | rx_buflen = ISER_RX_PAYLOAD_SIZE; | |
4c22e07f | 1594 | isert_dbg("req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1595 | rx_dma, rx_buflen); |
1596 | } | |
1597 | ||
1598 | ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); | |
1599 | ||
1600 | hdr = &desc->iscsi_header; | |
24f412dd | 1601 | isert_dbg("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", |
b8d26b3b NB |
1602 | hdr->opcode, hdr->itt, hdr->flags, |
1603 | (int)(xfer_len - ISER_HEADERS_LEN)); | |
1604 | ||
2371e5da SG |
1605 | if ((char *)desc == isert_conn->login_req_buf) { |
1606 | isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN; | |
1607 | if (isert_conn->conn) { | |
1608 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
1609 | ||
1610 | if (login && !login->first_request) | |
1611 | isert_rx_login_req(isert_conn); | |
1612 | } | |
dac6ab30 | 1613 | mutex_lock(&isert_conn->mutex); |
2371e5da | 1614 | complete(&isert_conn->login_req_comp); |
dac6ab30 | 1615 | mutex_unlock(&isert_conn->mutex); |
2371e5da | 1616 | } else { |
b8d26b3b | 1617 | isert_rx_do_work(desc, isert_conn); |
2371e5da | 1618 | } |
b8d26b3b NB |
1619 | |
1620 | ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, | |
1621 | DMA_FROM_DEVICE); | |
1622 | ||
1623 | isert_conn->post_recv_buf_count--; | |
b8d26b3b NB |
1624 | } |
1625 | ||
e3d7e4c3 SG |
1626 | static int |
1627 | isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
1628 | struct scatterlist *sg, u32 nents, u32 length, u32 offset, | |
1629 | enum iser_ib_op_code op, struct isert_data_buf *data) | |
1630 | { | |
dac6ab30 | 1631 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1632 | |
1633 | data->dma_dir = op == ISER_IB_RDMA_WRITE ? | |
1634 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
1635 | ||
1636 | data->len = length - offset; | |
1637 | data->offset = offset; | |
1638 | data->sg_off = data->offset / PAGE_SIZE; | |
1639 | ||
1640 | data->sg = &sg[data->sg_off]; | |
1641 | data->nents = min_t(unsigned int, nents - data->sg_off, | |
1642 | ISCSI_ISER_SG_TABLESIZE); | |
1643 | data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * | |
1644 | PAGE_SIZE); | |
1645 | ||
1646 | data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, | |
1647 | data->dma_dir); | |
1648 | if (unlikely(!data->dma_nents)) { | |
24f412dd | 1649 | isert_err("Cmd: unable to dma map SGs %p\n", sg); |
e3d7e4c3 SG |
1650 | return -EINVAL; |
1651 | } | |
1652 | ||
24f412dd | 1653 | isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", |
4c22e07f | 1654 | isert_cmd, data->dma_nents, data->sg, data->nents, data->len); |
e3d7e4c3 SG |
1655 | |
1656 | return 0; | |
1657 | } | |
1658 | ||
1659 | static void | |
1660 | isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) | |
1661 | { | |
dac6ab30 | 1662 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1663 | |
1664 | ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); | |
1665 | memset(data, 0, sizeof(*data)); | |
1666 | } | |
1667 | ||
1668 | ||
1669 | ||
b8d26b3b NB |
1670 | static void |
1671 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) | |
1672 | { | |
1673 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
b8d26b3b | 1674 | |
4c22e07f | 1675 | isert_dbg("Cmd %p\n", isert_cmd); |
e3d7e4c3 SG |
1676 | |
1677 | if (wr->data.sg) { | |
4c22e07f | 1678 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1679 | isert_unmap_data_buf(isert_conn, &wr->data); |
b8d26b3b NB |
1680 | } |
1681 | ||
e622f2f4 | 1682 | if (wr->rdma_wr) { |
4c22e07f | 1683 | isert_dbg("Cmd %p free send_wr\n", isert_cmd); |
e622f2f4 CH |
1684 | kfree(wr->rdma_wr); |
1685 | wr->rdma_wr = NULL; | |
90ecc6e2 | 1686 | } |
b8d26b3b | 1687 | |
90ecc6e2 | 1688 | if (wr->ib_sge) { |
4c22e07f | 1689 | isert_dbg("Cmd %p free ib_sge\n", isert_cmd); |
90ecc6e2 VP |
1690 | kfree(wr->ib_sge); |
1691 | wr->ib_sge = NULL; | |
1692 | } | |
b8d26b3b NB |
1693 | } |
1694 | ||
59464ef4 | 1695 | static void |
a3a5a826 | 1696 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) |
59464ef4 VP |
1697 | { |
1698 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
59464ef4 | 1699 | |
4c22e07f | 1700 | isert_dbg("Cmd %p\n", isert_cmd); |
59464ef4 VP |
1701 | |
1702 | if (wr->fr_desc) { | |
4c22e07f | 1703 | isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd, wr->fr_desc); |
9e961ae7 SG |
1704 | if (wr->fr_desc->ind & ISERT_PROTECTED) { |
1705 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
1706 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
1707 | } | |
dac6ab30 SG |
1708 | spin_lock_bh(&isert_conn->pool_lock); |
1709 | list_add_tail(&wr->fr_desc->list, &isert_conn->fr_pool); | |
1710 | spin_unlock_bh(&isert_conn->pool_lock); | |
59464ef4 VP |
1711 | wr->fr_desc = NULL; |
1712 | } | |
1713 | ||
e3d7e4c3 | 1714 | if (wr->data.sg) { |
4c22e07f | 1715 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1716 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 VP |
1717 | } |
1718 | ||
1719 | wr->ib_sge = NULL; | |
e622f2f4 | 1720 | wr->rdma_wr = NULL; |
59464ef4 VP |
1721 | } |
1722 | ||
b8d26b3b | 1723 | static void |
03e7848a | 1724 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1725 | { |
d703ce2f | 1726 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1727 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1728 | struct iscsi_conn *conn = isert_conn->conn; |
dac6ab30 | 1729 | struct isert_device *device = isert_conn->device; |
e4f4e801 | 1730 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1731 | |
4c22e07f | 1732 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1733 | |
1734 | switch (cmd->iscsi_opcode) { | |
1735 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1736 | spin_lock_bh(&conn->cmd_lock); |
1737 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1738 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1739 | spin_unlock_bh(&conn->cmd_lock); |
1740 | ||
03e7848a | 1741 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1742 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1743 | /* |
1744 | * Check for special case during comp_err where | |
1745 | * WRITE_PENDING has been handed off from core, | |
1746 | * but requires an extra target_put_sess_cmd() | |
1747 | * before transport_generic_free_cmd() below. | |
1748 | */ | |
1749 | if (comp_err && | |
1750 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1751 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1752 | ||
afc16604 | 1753 | target_put_sess_cmd(se_cmd); |
03e7848a NB |
1754 | } |
1755 | } | |
b8d26b3b | 1756 | |
d40945d8 | 1757 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
186a9647 NB |
1758 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1759 | break; | |
b8d26b3b | 1760 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1761 | spin_lock_bh(&conn->cmd_lock); |
1762 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1763 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1764 | spin_unlock_bh(&conn->cmd_lock); |
1765 | ||
b8d26b3b NB |
1766 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1767 | break; | |
1768 | case ISCSI_OP_REJECT: | |
1769 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1770 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1771 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1772 | /* If the continue bit is on, keep the command alive */ | |
1773 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1774 | break; | |
1775 | ||
b8d26b3b NB |
1776 | spin_lock_bh(&conn->cmd_lock); |
1777 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1778 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1779 | spin_unlock_bh(&conn->cmd_lock); |
1780 | ||
1781 | /* | |
1782 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1783 | * overwritten the original iscsi_opcode assignment, and the | |
1784 | * associated cmd->se_cmd needs to be released. | |
1785 | */ | |
1786 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1787 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1788 | cmd->iscsi_opcode); |
b8d26b3b NB |
1789 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1790 | break; | |
1791 | } | |
1792 | /* | |
1793 | * Fall-through | |
1794 | */ | |
1795 | default: | |
d703ce2f | 1796 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1797 | break; |
1798 | } | |
1799 | } | |
1800 | ||
1801 | static void | |
1802 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1803 | { | |
1804 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1805 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1806 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1807 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1808 | tx_desc->dma_addr = 0; | |
1809 | } | |
1810 | } | |
1811 | ||
1812 | static void | |
1813 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1814 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1815 | { |
dbbc5d11 | 1816 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1817 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1818 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1819 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1820 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1821 | } |
1822 | ||
1823 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1824 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1825 | } |
1826 | ||
96b7973e SG |
1827 | static int |
1828 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1829 | { | |
1830 | struct ib_mr_status mr_status; | |
1831 | int ret; | |
1832 | ||
1833 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1834 | if (ret) { | |
24f412dd | 1835 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1836 | goto fail_mr_status; |
1837 | } | |
1838 | ||
1839 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1840 | u64 sec_offset_err; | |
1841 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1842 | ||
1843 | switch (mr_status.sig_err.err_type) { | |
1844 | case IB_SIG_BAD_GUARD: | |
1845 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1846 | break; | |
1847 | case IB_SIG_BAD_REFTAG: | |
1848 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1849 | break; | |
1850 | case IB_SIG_BAD_APPTAG: | |
1851 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1852 | break; | |
1853 | } | |
1854 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1855 | do_div(sec_offset_err, block_size); | |
1856 | se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; | |
1857 | ||
4c22e07f SG |
1858 | isert_err("PI error found type %d at sector 0x%llx " |
1859 | "expected 0x%x vs actual 0x%x\n", | |
1860 | mr_status.sig_err.err_type, | |
1861 | (unsigned long long)se_cmd->bad_sector, | |
1862 | mr_status.sig_err.expected, | |
1863 | mr_status.sig_err.actual); | |
96b7973e SG |
1864 | ret = 1; |
1865 | } | |
1866 | ||
1867 | fail_mr_status: | |
1868 | return ret; | |
1869 | } | |
1870 | ||
f93f3a70 SG |
1871 | static void |
1872 | isert_completion_rdma_write(struct iser_tx_desc *tx_desc, | |
1873 | struct isert_cmd *isert_cmd) | |
1874 | { | |
9e961ae7 | 1875 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
f93f3a70 | 1876 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
9e961ae7 | 1877 | struct se_cmd *se_cmd = &cmd->se_cmd; |
f93f3a70 | 1878 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1879 | struct isert_device *device = isert_conn->device; |
9e961ae7 SG |
1880 | int ret = 0; |
1881 | ||
1882 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { | |
96b7973e SG |
1883 | ret = isert_check_pi_status(se_cmd, |
1884 | wr->fr_desc->pi_ctx->sig_mr); | |
1885 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 | 1886 | } |
f93f3a70 SG |
1887 | |
1888 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
e622f2f4 | 1889 | wr->rdma_wr_num = 0; |
9e961ae7 SG |
1890 | if (ret) |
1891 | transport_send_check_condition_and_sense(se_cmd, | |
1892 | se_cmd->pi_err, 0); | |
1893 | else | |
1894 | isert_put_response(isert_conn->conn, cmd); | |
f93f3a70 SG |
1895 | } |
1896 | ||
b8d26b3b NB |
1897 | static void |
1898 | isert_completion_rdma_read(struct iser_tx_desc *tx_desc, | |
1899 | struct isert_cmd *isert_cmd) | |
1900 | { | |
1901 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
d703ce2f | 1902 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1903 | struct se_cmd *se_cmd = &cmd->se_cmd; |
90ecc6e2 | 1904 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1905 | struct isert_device *device = isert_conn->device; |
5bac4b1a | 1906 | int ret = 0; |
b8d26b3b | 1907 | |
9e961ae7 | 1908 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { |
96b7973e SG |
1909 | ret = isert_check_pi_status(se_cmd, |
1910 | wr->fr_desc->pi_ctx->sig_mr); | |
1911 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 SG |
1912 | } |
1913 | ||
b8d26b3b | 1914 | iscsit_stop_dataout_timer(cmd); |
d40945d8 | 1915 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
e3d7e4c3 | 1916 | cmd->write_data_done = wr->data.len; |
e622f2f4 | 1917 | wr->rdma_wr_num = 0; |
b8d26b3b | 1918 | |
24f412dd | 1919 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1920 | spin_lock_bh(&cmd->istate_lock); |
1921 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1922 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1923 | spin_unlock_bh(&cmd->istate_lock); | |
1924 | ||
364189f0 | 1925 | if (ret) { |
afc16604 | 1926 | target_put_sess_cmd(se_cmd); |
5bac4b1a SG |
1927 | transport_send_check_condition_and_sense(se_cmd, |
1928 | se_cmd->pi_err, 0); | |
364189f0 | 1929 | } else { |
5bac4b1a | 1930 | target_execute_cmd(se_cmd); |
364189f0 | 1931 | } |
b8d26b3b NB |
1932 | } |
1933 | ||
1934 | static void | |
1935 | isert_do_control_comp(struct work_struct *work) | |
1936 | { | |
1937 | struct isert_cmd *isert_cmd = container_of(work, | |
1938 | struct isert_cmd, comp_work); | |
1939 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1940 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
d703ce2f | 1941 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1942 | |
4c22e07f SG |
1943 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1944 | ||
b8d26b3b NB |
1945 | switch (cmd->i_state) { |
1946 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1947 | iscsit_tmr_post_handler(cmd, cmd->conn); |
10633c37 SG |
1948 | case ISTATE_SEND_REJECT: /* FALLTHRU */ |
1949 | case ISTATE_SEND_TEXTRSP: /* FALLTHRU */ | |
b8d26b3b | 1950 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1951 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1952 | ib_dev, false); | |
3df8f68a | 1953 | break; |
b8d26b3b | 1954 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1955 | iscsit_logout_post_handler(cmd, cmd->conn); |
1956 | break; | |
1957 | default: | |
4c22e07f | 1958 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1959 | dump_stack(); |
1960 | break; | |
1961 | } | |
1962 | } | |
1963 | ||
1964 | static void | |
1965 | isert_response_completion(struct iser_tx_desc *tx_desc, | |
1966 | struct isert_cmd *isert_cmd, | |
1967 | struct isert_conn *isert_conn, | |
1968 | struct ib_device *ib_dev) | |
1969 | { | |
d703ce2f | 1970 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b NB |
1971 | |
1972 | if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || | |
3df8f68a | 1973 | cmd->i_state == ISTATE_SEND_LOGOUTRSP || |
adb54c29 NB |
1974 | cmd->i_state == ISTATE_SEND_REJECT || |
1975 | cmd->i_state == ISTATE_SEND_TEXTRSP) { | |
b8d26b3b NB |
1976 | isert_unmap_tx_desc(tx_desc, ib_dev); |
1977 | ||
1978 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1979 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1980 | return; | |
1981 | } | |
897bb2c9 | 1982 | |
b8d26b3b | 1983 | cmd->i_state = ISTATE_SENT_STATUS; |
03e7848a | 1984 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); |
b8d26b3b NB |
1985 | } |
1986 | ||
1987 | static void | |
7748681b | 1988 | isert_snd_completion(struct iser_tx_desc *tx_desc, |
68a86dee | 1989 | struct isert_conn *isert_conn) |
b8d26b3b | 1990 | { |
dac6ab30 | 1991 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1992 | struct isert_cmd *isert_cmd = tx_desc->isert_cmd; |
1993 | struct isert_rdma_wr *wr; | |
1994 | ||
1995 | if (!isert_cmd) { | |
b8d26b3b NB |
1996 | isert_unmap_tx_desc(tx_desc, ib_dev); |
1997 | return; | |
1998 | } | |
1999 | wr = &isert_cmd->rdma_wr; | |
2000 | ||
4c22e07f SG |
2001 | isert_dbg("Cmd %p iser_ib_op %d\n", isert_cmd, wr->iser_ib_op); |
2002 | ||
b8d26b3b | 2003 | switch (wr->iser_ib_op) { |
b8d26b3b | 2004 | case ISER_IB_SEND: |
b8d26b3b NB |
2005 | isert_response_completion(tx_desc, isert_cmd, |
2006 | isert_conn, ib_dev); | |
2007 | break; | |
2008 | case ISER_IB_RDMA_WRITE: | |
f93f3a70 | 2009 | isert_completion_rdma_write(tx_desc, isert_cmd); |
b8d26b3b NB |
2010 | break; |
2011 | case ISER_IB_RDMA_READ: | |
b8d26b3b NB |
2012 | isert_completion_rdma_read(tx_desc, isert_cmd); |
2013 | break; | |
2014 | default: | |
4c22e07f | 2015 | isert_err("Unknown wr->iser_ib_op: 0x%x\n", wr->iser_ib_op); |
b8d26b3b NB |
2016 | dump_stack(); |
2017 | break; | |
2018 | } | |
2019 | } | |
2020 | ||
6f0fae3d SG |
2021 | /** |
2022 | * is_isert_tx_desc() - Indicate if the completion wr_id | |
2023 | * is a TX descriptor or not. | |
2024 | * @isert_conn: iser connection | |
2025 | * @wr_id: completion WR identifier | |
2026 | * | |
2027 | * Since we cannot rely on wc opcode in FLUSH errors | |
2028 | * we must work around it by checking if the wr_id address | |
2029 | * falls in the iser connection rx_descs buffer. If so | |
2030 | * it is an RX descriptor, otherwize it is a TX. | |
2031 | */ | |
2032 | static inline bool | |
2033 | is_isert_tx_desc(struct isert_conn *isert_conn, void *wr_id) | |
2034 | { | |
dac6ab30 SG |
2035 | void *start = isert_conn->rx_descs; |
2036 | int len = ISERT_QP_MAX_RECV_DTOS * sizeof(*isert_conn->rx_descs); | |
6f0fae3d SG |
2037 | |
2038 | if (wr_id >= start && wr_id < start + len) | |
2039 | return false; | |
2040 | ||
2041 | return true; | |
2042 | } | |
2043 | ||
b8d26b3b | 2044 | static void |
6f0fae3d | 2045 | isert_cq_comp_err(struct isert_conn *isert_conn, struct ib_wc *wc) |
b8d26b3b | 2046 | { |
bdf20e72 | 2047 | if (wc->wr_id == ISER_BEACON_WRID) { |
dac6ab30 | 2048 | isert_info("conn %p completing wait_comp_err\n", |
bdf20e72 | 2049 | isert_conn); |
dac6ab30 | 2050 | complete(&isert_conn->wait_comp_err); |
ed4520ae | 2051 | } else if (is_isert_tx_desc(isert_conn, (void *)(uintptr_t)wc->wr_id)) { |
dac6ab30 | 2052 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
df43debd | 2053 | struct isert_cmd *isert_cmd; |
6f0fae3d | 2054 | struct iser_tx_desc *desc; |
df43debd | 2055 | |
6f0fae3d SG |
2056 | desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
2057 | isert_cmd = desc->isert_cmd; | |
df43debd SG |
2058 | if (!isert_cmd) |
2059 | isert_unmap_tx_desc(desc, ib_dev); | |
2060 | else | |
2061 | isert_completion_put(desc, isert_cmd, ib_dev, true); | |
df43debd SG |
2062 | } else { |
2063 | isert_conn->post_recv_buf_count--; | |
bdf20e72 SG |
2064 | if (!isert_conn->post_recv_buf_count) |
2065 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
df43debd | 2066 | } |
b8d26b3b NB |
2067 | } |
2068 | ||
2069 | static void | |
6f0fae3d | 2070 | isert_handle_wc(struct ib_wc *wc) |
b8d26b3b | 2071 | { |
b8d26b3b NB |
2072 | struct isert_conn *isert_conn; |
2073 | struct iser_tx_desc *tx_desc; | |
6f0fae3d | 2074 | struct iser_rx_desc *rx_desc; |
b8d26b3b | 2075 | |
6f0fae3d SG |
2076 | isert_conn = wc->qp->qp_context; |
2077 | if (likely(wc->status == IB_WC_SUCCESS)) { | |
2078 | if (wc->opcode == IB_WC_RECV) { | |
2079 | rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id; | |
7748681b | 2080 | isert_rcv_completion(rx_desc, isert_conn, wc->byte_len); |
b8d26b3b | 2081 | } else { |
6f0fae3d | 2082 | tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
7748681b | 2083 | isert_snd_completion(tx_desc, isert_conn); |
b8d26b3b | 2084 | } |
6f0fae3d SG |
2085 | } else { |
2086 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
ea8a1616 SG |
2087 | isert_err("%s (%d): wr id %llx vend_err %x\n", |
2088 | ib_wc_status_msg(wc->status), wc->status, | |
2089 | wc->wr_id, wc->vendor_err); | |
6f0fae3d | 2090 | else |
ea8a1616 SG |
2091 | isert_dbg("%s (%d): wr id %llx\n", |
2092 | ib_wc_status_msg(wc->status), wc->status, | |
2093 | wc->wr_id); | |
b8d26b3b | 2094 | |
6f0fae3d SG |
2095 | if (wc->wr_id != ISER_FASTREG_LI_WRID) |
2096 | isert_cq_comp_err(isert_conn, wc); | |
2097 | } | |
b8d26b3b NB |
2098 | } |
2099 | ||
2100 | static void | |
6f0fae3d | 2101 | isert_cq_work(struct work_struct *work) |
b8d26b3b | 2102 | { |
37d9fe80 | 2103 | enum { isert_poll_budget = 65536 }; |
4a295bae | 2104 | struct isert_comp *comp = container_of(work, struct isert_comp, |
6f0fae3d | 2105 | work); |
36ea63b5 SG |
2106 | struct ib_wc *const wcs = comp->wcs; |
2107 | int i, n, completed = 0; | |
b8d26b3b | 2108 | |
36ea63b5 SG |
2109 | while ((n = ib_poll_cq(comp->cq, ARRAY_SIZE(comp->wcs), wcs)) > 0) { |
2110 | for (i = 0; i < n; i++) | |
2111 | isert_handle_wc(&wcs[i]); | |
b8d26b3b | 2112 | |
36ea63b5 SG |
2113 | completed += n; |
2114 | if (completed >= isert_poll_budget) | |
37d9fe80 SG |
2115 | break; |
2116 | } | |
2117 | ||
6f0fae3d | 2118 | ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
b8d26b3b NB |
2119 | } |
2120 | ||
2121 | static void | |
6f0fae3d | 2122 | isert_cq_callback(struct ib_cq *cq, void *context) |
b8d26b3b | 2123 | { |
4a295bae | 2124 | struct isert_comp *comp = context; |
b8d26b3b | 2125 | |
6f0fae3d | 2126 | queue_work(isert_comp_wq, &comp->work); |
b8d26b3b NB |
2127 | } |
2128 | ||
2129 | static int | |
2130 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
2131 | { | |
2132 | struct ib_send_wr *wr_failed; | |
2133 | int ret; | |
2134 | ||
4366b19c JD |
2135 | ret = isert_post_recv(isert_conn, isert_cmd->rx_desc); |
2136 | if (ret) { | |
2137 | isert_err("ib_post_recv failed with %d\n", ret); | |
2138 | return ret; | |
2139 | } | |
2140 | ||
dac6ab30 | 2141 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, |
b8d26b3b NB |
2142 | &wr_failed); |
2143 | if (ret) { | |
24f412dd | 2144 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
2145 | return ret; |
2146 | } | |
2147 | return ret; | |
2148 | } | |
2149 | ||
2150 | static int | |
2151 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2152 | { | |
d703ce2f | 2153 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2154 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2155 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2156 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
2157 | &isert_cmd->tx_desc.iscsi_header; | |
2158 | ||
2159 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2160 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
2161 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2162 | /* | |
2163 | * Attach SENSE DATA payload to iSCSI Response PDU | |
2164 | */ | |
2165 | if (cmd->se_cmd.sense_buffer && | |
2166 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
2167 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 2168 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2169 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 2170 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 2171 | u32 padding, pdu_len; |
b8d26b3b NB |
2172 | |
2173 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
2174 | cmd->sense_buffer); | |
2175 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
2176 | ||
2177 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
2178 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 2179 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 2180 | |
dbbc5d11 NB |
2181 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
2182 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b NB |
2183 | DMA_TO_DEVICE); |
2184 | ||
dbbc5d11 NB |
2185 | isert_cmd->pdu_buf_len = pdu_len; |
2186 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2187 | tx_dsg->length = pdu_len; | |
34efc7df | 2188 | tx_dsg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
2189 | isert_cmd->tx_desc.num_sge = 2; |
2190 | } | |
2191 | ||
68a86dee | 2192 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2193 | |
4c22e07f | 2194 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
2195 | |
2196 | return isert_post_response(isert_conn, isert_cmd); | |
2197 | } | |
2198 | ||
131e6abc NB |
2199 | static void |
2200 | isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2201 | { | |
2202 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 2203 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2204 | struct isert_device *device = isert_conn->device; |
131e6abc NB |
2205 | |
2206 | spin_lock_bh(&conn->cmd_lock); | |
2207 | if (!list_empty(&cmd->i_conn_node)) | |
2208 | list_del_init(&cmd->i_conn_node); | |
2209 | spin_unlock_bh(&conn->cmd_lock); | |
2210 | ||
2211 | if (cmd->data_direction == DMA_TO_DEVICE) | |
2212 | iscsit_stop_dataout_timer(cmd); | |
2213 | ||
2214 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
2215 | } | |
2216 | ||
e70beee7 NB |
2217 | static enum target_prot_op |
2218 | isert_get_sup_prot_ops(struct iscsi_conn *conn) | |
2219 | { | |
6700425e | 2220 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2221 | struct isert_device *device = isert_conn->device; |
e70beee7 | 2222 | |
23a548ee SG |
2223 | if (conn->tpg->tpg_attrib.t10_pi) { |
2224 | if (device->pi_capable) { | |
24f412dd | 2225 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
2226 | isert_conn->pi_support = true; |
2227 | return TARGET_PROT_ALL; | |
2228 | } | |
2229 | } | |
2230 | ||
24f412dd | 2231 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 2232 | isert_conn->pi_support = false; |
e70beee7 NB |
2233 | |
2234 | return TARGET_PROT_NORMAL; | |
2235 | } | |
2236 | ||
b8d26b3b NB |
2237 | static int |
2238 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2239 | bool nopout_response) | |
2240 | { | |
d703ce2f | 2241 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2242 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2243 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2244 | ||
2245 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2246 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
2247 | &isert_cmd->tx_desc.iscsi_header, | |
2248 | nopout_response); | |
2249 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2250 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2251 | |
4c22e07f | 2252 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
2253 | |
2254 | return isert_post_response(isert_conn, isert_cmd); | |
2255 | } | |
2256 | ||
2257 | static int | |
2258 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2259 | { | |
d703ce2f | 2260 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2261 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2262 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2263 | ||
2264 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2265 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
2266 | &isert_cmd->tx_desc.iscsi_header); | |
2267 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2268 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2269 | |
4c22e07f | 2270 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
2271 | |
2272 | return isert_post_response(isert_conn, isert_cmd); | |
2273 | } | |
2274 | ||
2275 | static int | |
2276 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2277 | { | |
d703ce2f | 2278 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2279 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2280 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2281 | ||
2282 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2283 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
2284 | &isert_cmd->tx_desc.iscsi_header); | |
2285 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2286 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2287 | |
4c22e07f | 2288 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
2289 | |
2290 | return isert_post_response(isert_conn, isert_cmd); | |
2291 | } | |
2292 | ||
2293 | static int | |
2294 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2295 | { | |
d703ce2f | 2296 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2297 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 2298 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 2299 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2300 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
2301 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2302 | struct iscsi_reject *hdr = | |
2303 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
2304 | |
2305 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 2306 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 2307 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
2308 | |
2309 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 2310 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
2311 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
2312 | DMA_TO_DEVICE); | |
dbbc5d11 NB |
2313 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
2314 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 2315 | tx_dsg->length = ISCSI_HDR_LEN; |
34efc7df | 2316 | tx_dsg->lkey = device->pd->local_dma_lkey; |
3df8f68a NB |
2317 | isert_cmd->tx_desc.num_sge = 2; |
2318 | ||
68a86dee | 2319 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2320 | |
4c22e07f | 2321 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
2322 | |
2323 | return isert_post_response(isert_conn, isert_cmd); | |
2324 | } | |
2325 | ||
adb54c29 NB |
2326 | static int |
2327 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2328 | { | |
d703ce2f | 2329 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2330 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
2331 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2332 | struct iscsi_text_rsp *hdr = | |
2333 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
2334 | u32 txt_rsp_len; | |
2335 | int rc; | |
2336 | ||
2337 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 2338 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
2339 | if (rc < 0) |
2340 | return rc; | |
2341 | ||
2342 | txt_rsp_len = rc; | |
2343 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2344 | ||
2345 | if (txt_rsp_len) { | |
dac6ab30 | 2346 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2347 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
2348 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2349 | void *txt_rsp_buf = cmd->buf_ptr; | |
2350 | ||
2351 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
2352 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
2353 | ||
2354 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
2355 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2356 | tx_dsg->length = txt_rsp_len; | |
34efc7df | 2357 | tx_dsg->lkey = device->pd->local_dma_lkey; |
adb54c29 NB |
2358 | isert_cmd->tx_desc.num_sge = 2; |
2359 | } | |
68a86dee | 2360 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 2361 | |
f64d2792 | 2362 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
2363 | |
2364 | return isert_post_response(isert_conn, isert_cmd); | |
2365 | } | |
2366 | ||
b8d26b3b NB |
2367 | static int |
2368 | isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
e622f2f4 | 2369 | struct ib_sge *ib_sge, struct ib_rdma_wr *rdma_wr, |
b8d26b3b NB |
2370 | u32 data_left, u32 offset) |
2371 | { | |
d703ce2f | 2372 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 2373 | struct scatterlist *sg_start, *tmp_sg; |
dac6ab30 | 2374 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2375 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
2376 | u32 sg_off, page_off; |
2377 | int i = 0, sg_nents; | |
2378 | ||
2379 | sg_off = offset / PAGE_SIZE; | |
2380 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
2381 | sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); | |
2382 | page_off = offset % PAGE_SIZE; | |
2383 | ||
e622f2f4 CH |
2384 | rdma_wr->wr.sg_list = ib_sge; |
2385 | rdma_wr->wr.wr_id = (uintptr_t)&isert_cmd->tx_desc; | |
b8d26b3b NB |
2386 | /* |
2387 | * Perform mapping of TCM scatterlist memory ib_sge dma_addr. | |
2388 | */ | |
2389 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
4c22e07f SG |
2390 | isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, " |
2391 | "page_off: %u\n", | |
2392 | (unsigned long long)tmp_sg->dma_address, | |
2393 | tmp_sg->length, page_off); | |
b8d26b3b NB |
2394 | |
2395 | ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; | |
2396 | ib_sge->length = min_t(u32, data_left, | |
2397 | ib_sg_dma_len(ib_dev, tmp_sg) - page_off); | |
34efc7df | 2398 | ib_sge->lkey = device->pd->local_dma_lkey; |
b8d26b3b | 2399 | |
4c22e07f SG |
2400 | isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n", |
2401 | ib_sge->addr, ib_sge->length, ib_sge->lkey); | |
b8d26b3b NB |
2402 | page_off = 0; |
2403 | data_left -= ib_sge->length; | |
9253e667 SG |
2404 | if (!data_left) |
2405 | break; | |
b8d26b3b | 2406 | ib_sge++; |
24f412dd | 2407 | isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge); |
b8d26b3b NB |
2408 | } |
2409 | ||
e622f2f4 | 2410 | rdma_wr->wr.num_sge = ++i; |
24f412dd | 2411 | isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", |
e622f2f4 | 2412 | rdma_wr->wr.sg_list, rdma_wr->wr.num_sge); |
b8d26b3b | 2413 | |
e622f2f4 | 2414 | return rdma_wr->wr.num_sge; |
b8d26b3b NB |
2415 | } |
2416 | ||
2417 | static int | |
90ecc6e2 VP |
2418 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2419 | struct isert_rdma_wr *wr) | |
b8d26b3b NB |
2420 | { |
2421 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2422 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2423 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2424 | struct isert_data_buf *data = &wr->data; |
e622f2f4 | 2425 | struct ib_rdma_wr *rdma_wr; |
b8d26b3b | 2426 | struct ib_sge *ib_sge; |
e3d7e4c3 SG |
2427 | u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; |
2428 | int ret = 0, i, ib_sge_cnt; | |
90ecc6e2 | 2429 | |
e3d7e4c3 | 2430 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
b8d26b3b | 2431 | |
e3d7e4c3 SG |
2432 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2433 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2434 | se_cmd->t_data_nents, se_cmd->data_length, | |
2435 | offset, wr->iser_ib_op, &wr->data); | |
2436 | if (ret) | |
2437 | return ret; | |
b8d26b3b | 2438 | |
e3d7e4c3 SG |
2439 | data_left = data->len; |
2440 | offset = data->offset; | |
b8d26b3b | 2441 | |
e3d7e4c3 | 2442 | ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); |
b8d26b3b | 2443 | if (!ib_sge) { |
24f412dd | 2444 | isert_warn("Unable to allocate ib_sge\n"); |
b8d26b3b | 2445 | ret = -ENOMEM; |
e3d7e4c3 | 2446 | goto unmap_cmd; |
b8d26b3b | 2447 | } |
90ecc6e2 | 2448 | wr->ib_sge = ib_sge; |
b8d26b3b | 2449 | |
e622f2f4 CH |
2450 | wr->rdma_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); |
2451 | wr->rdma_wr = kzalloc(sizeof(struct ib_rdma_wr) * wr->rdma_wr_num, | |
b8d26b3b | 2452 | GFP_KERNEL); |
e622f2f4 CH |
2453 | if (!wr->rdma_wr) { |
2454 | isert_dbg("Unable to allocate wr->rdma_wr\n"); | |
b8d26b3b | 2455 | ret = -ENOMEM; |
e3d7e4c3 | 2456 | goto unmap_cmd; |
b8d26b3b | 2457 | } |
b8d26b3b NB |
2458 | |
2459 | wr->isert_cmd = isert_cmd; | |
2460 | rdma_write_max = isert_conn->max_sge * PAGE_SIZE; | |
b8d26b3b | 2461 | |
e622f2f4 CH |
2462 | for (i = 0; i < wr->rdma_wr_num; i++) { |
2463 | rdma_wr = &isert_cmd->rdma_wr.rdma_wr[i]; | |
b8d26b3b NB |
2464 | data_len = min(data_left, rdma_write_max); |
2465 | ||
e622f2f4 | 2466 | rdma_wr->wr.send_flags = 0; |
90ecc6e2 | 2467 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
e622f2f4 CH |
2468 | rdma_wr->wr.opcode = IB_WR_RDMA_WRITE; |
2469 | rdma_wr->remote_addr = isert_cmd->read_va + offset; | |
2470 | rdma_wr->rkey = isert_cmd->read_stag; | |
2471 | if (i + 1 == wr->rdma_wr_num) | |
2472 | rdma_wr->wr.next = &isert_cmd->tx_desc.send_wr; | |
90ecc6e2 | 2473 | else |
e622f2f4 | 2474 | rdma_wr->wr.next = &wr->rdma_wr[i + 1].wr; |
90ecc6e2 | 2475 | } else { |
e622f2f4 CH |
2476 | rdma_wr->wr.opcode = IB_WR_RDMA_READ; |
2477 | rdma_wr->remote_addr = isert_cmd->write_va + va_offset; | |
2478 | rdma_wr->rkey = isert_cmd->write_stag; | |
2479 | if (i + 1 == wr->rdma_wr_num) | |
2480 | rdma_wr->wr.send_flags = IB_SEND_SIGNALED; | |
90ecc6e2 | 2481 | else |
e622f2f4 | 2482 | rdma_wr->wr.next = &wr->rdma_wr[i + 1].wr; |
90ecc6e2 | 2483 | } |
b8d26b3b NB |
2484 | |
2485 | ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, | |
e622f2f4 | 2486 | rdma_wr, data_len, offset); |
b8d26b3b NB |
2487 | ib_sge += ib_sge_cnt; |
2488 | ||
b8d26b3b | 2489 | offset += data_len; |
90ecc6e2 | 2490 | va_offset += data_len; |
b8d26b3b NB |
2491 | data_left -= data_len; |
2492 | } | |
90ecc6e2 VP |
2493 | |
2494 | return 0; | |
e3d7e4c3 SG |
2495 | unmap_cmd: |
2496 | isert_unmap_data_buf(isert_conn, data); | |
2497 | ||
90ecc6e2 VP |
2498 | return ret; |
2499 | } | |
2500 | ||
10633c37 SG |
2501 | static inline void |
2502 | isert_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr) | |
2503 | { | |
2504 | u32 rkey; | |
2505 | ||
2506 | memset(inv_wr, 0, sizeof(*inv_wr)); | |
2507 | inv_wr->wr_id = ISER_FASTREG_LI_WRID; | |
2508 | inv_wr->opcode = IB_WR_LOCAL_INV; | |
2509 | inv_wr->ex.invalidate_rkey = mr->rkey; | |
2510 | ||
2511 | /* Bump the key */ | |
2512 | rkey = ib_inc_rkey(mr->rkey); | |
2513 | ib_update_fast_reg_key(mr, rkey); | |
2514 | } | |
2515 | ||
59464ef4 | 2516 | static int |
e3d7e4c3 SG |
2517 | isert_fast_reg_mr(struct isert_conn *isert_conn, |
2518 | struct fast_reg_descriptor *fr_desc, | |
2519 | struct isert_data_buf *mem, | |
9e961ae7 | 2520 | enum isert_indicator ind, |
e3d7e4c3 | 2521 | struct ib_sge *sge) |
59464ef4 | 2522 | { |
dac6ab30 | 2523 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2524 | struct ib_device *ib_dev = device->ib_device; |
9e961ae7 | 2525 | struct ib_mr *mr; |
16c2d702 | 2526 | struct ib_reg_wr reg_wr; |
e622f2f4 | 2527 | struct ib_send_wr inv_wr, *bad_wr, *wr = NULL; |
16c2d702 | 2528 | int ret, n; |
59464ef4 | 2529 | |
e3d7e4c3 | 2530 | if (mem->dma_nents == 1) { |
34efc7df | 2531 | sge->lkey = device->pd->local_dma_lkey; |
e3d7e4c3 SG |
2532 | sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); |
2533 | sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); | |
4c22e07f SG |
2534 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2535 | sge->addr, sge->length, sge->lkey); | |
e3d7e4c3 SG |
2536 | return 0; |
2537 | } | |
2538 | ||
16c2d702 | 2539 | if (ind == ISERT_DATA_KEY_VALID) |
9e961ae7 SG |
2540 | /* Registering data buffer */ |
2541 | mr = fr_desc->data_mr; | |
16c2d702 | 2542 | else |
9e961ae7 SG |
2543 | /* Registering protection buffer */ |
2544 | mr = fr_desc->pi_ctx->prot_mr; | |
59464ef4 | 2545 | |
10633c37 SG |
2546 | if (!(fr_desc->ind & ind)) { |
2547 | isert_inv_rkey(&inv_wr, mr); | |
59464ef4 | 2548 | wr = &inv_wr; |
59464ef4 VP |
2549 | } |
2550 | ||
16c2d702 SG |
2551 | n = ib_map_mr_sg(mr, mem->sg, mem->nents, PAGE_SIZE); |
2552 | if (unlikely(n != mem->nents)) { | |
2553 | isert_err("failed to map mr sg (%d/%d)\n", | |
2554 | n, mem->nents); | |
2555 | return n < 0 ? n : -EINVAL; | |
2556 | } | |
2557 | ||
2558 | isert_dbg("Use fr_desc %p sg_nents %d offset %u\n", | |
2559 | fr_desc, mem->nents, mem->offset); | |
2560 | ||
2561 | reg_wr.wr.next = NULL; | |
2562 | reg_wr.wr.opcode = IB_WR_REG_MR; | |
2563 | reg_wr.wr.wr_id = ISER_FASTREG_LI_WRID; | |
2564 | reg_wr.wr.send_flags = 0; | |
2565 | reg_wr.wr.num_sge = 0; | |
2566 | reg_wr.mr = mr; | |
2567 | reg_wr.key = mr->lkey; | |
2568 | reg_wr.access = IB_ACCESS_LOCAL_WRITE; | |
59464ef4 VP |
2569 | |
2570 | if (!wr) | |
16c2d702 | 2571 | wr = ®_wr.wr; |
59464ef4 | 2572 | else |
16c2d702 | 2573 | wr->next = ®_wr.wr; |
59464ef4 | 2574 | |
dac6ab30 | 2575 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
59464ef4 | 2576 | if (ret) { |
24f412dd | 2577 | isert_err("fast registration failed, ret:%d\n", ret); |
59464ef4 VP |
2578 | return ret; |
2579 | } | |
9e961ae7 | 2580 | fr_desc->ind &= ~ind; |
59464ef4 | 2581 | |
9e961ae7 | 2582 | sge->lkey = mr->lkey; |
16c2d702 SG |
2583 | sge->addr = mr->iova; |
2584 | sge->length = mr->length; | |
59464ef4 | 2585 | |
4c22e07f SG |
2586 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2587 | sge->addr, sge->length, sge->lkey); | |
9e961ae7 SG |
2588 | |
2589 | return ret; | |
2590 | } | |
2591 | ||
3d73cf1a SG |
2592 | static inline void |
2593 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, | |
2594 | struct ib_sig_domain *domain) | |
2595 | { | |
78eda2bb | 2596 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
2597 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
2598 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
2599 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
2600 | /* |
2601 | * At the moment we hard code those, but if in the future | |
2602 | * the target core would like to use it, we will take it | |
2603 | * from se_cmd. | |
2604 | */ | |
2605 | domain->sig.dif.apptag_check_mask = 0xffff; | |
2606 | domain->sig.dif.app_escape = true; | |
2607 | domain->sig.dif.ref_escape = true; | |
2608 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
2609 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
2610 | domain->sig.dif.ref_remap = true; | |
3d73cf1a SG |
2611 | }; |
2612 | ||
9e961ae7 SG |
2613 | static int |
2614 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2615 | { | |
9e961ae7 SG |
2616 | switch (se_cmd->prot_op) { |
2617 | case TARGET_PROT_DIN_INSERT: | |
2618 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2619 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2620 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
9e961ae7 SG |
2621 | break; |
2622 | case TARGET_PROT_DOUT_INSERT: | |
2623 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2624 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2625 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); |
9e961ae7 SG |
2626 | break; |
2627 | case TARGET_PROT_DIN_PASS: | |
2628 | case TARGET_PROT_DOUT_PASS: | |
3d73cf1a SG |
2629 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
2630 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); | |
9e961ae7 SG |
2631 | break; |
2632 | default: | |
24f412dd | 2633 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2634 | return -EINVAL; |
2635 | } | |
2636 | ||
2637 | return 0; | |
2638 | } | |
2639 | ||
2640 | static inline u8 | |
2641 | isert_set_prot_checks(u8 prot_checks) | |
2642 | { | |
2643 | return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | | |
2644 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | | |
2645 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); | |
2646 | } | |
2647 | ||
2648 | static int | |
570db170 SG |
2649 | isert_reg_sig_mr(struct isert_conn *isert_conn, |
2650 | struct se_cmd *se_cmd, | |
2651 | struct isert_rdma_wr *rdma_wr, | |
2652 | struct fast_reg_descriptor *fr_desc) | |
9e961ae7 | 2653 | { |
e622f2f4 CH |
2654 | struct ib_sig_handover_wr sig_wr; |
2655 | struct ib_send_wr inv_wr, *bad_wr, *wr = NULL; | |
9e961ae7 SG |
2656 | struct pi_context *pi_ctx = fr_desc->pi_ctx; |
2657 | struct ib_sig_attrs sig_attrs; | |
2658 | int ret; | |
9e961ae7 SG |
2659 | |
2660 | memset(&sig_attrs, 0, sizeof(sig_attrs)); | |
2661 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); | |
2662 | if (ret) | |
2663 | goto err; | |
59464ef4 | 2664 | |
9e961ae7 SG |
2665 | sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); |
2666 | ||
2667 | if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { | |
10633c37 | 2668 | isert_inv_rkey(&inv_wr, pi_ctx->sig_mr); |
9e961ae7 | 2669 | wr = &inv_wr; |
9e961ae7 SG |
2670 | } |
2671 | ||
2672 | memset(&sig_wr, 0, sizeof(sig_wr)); | |
e622f2f4 CH |
2673 | sig_wr.wr.opcode = IB_WR_REG_SIG_MR; |
2674 | sig_wr.wr.wr_id = ISER_FASTREG_LI_WRID; | |
2675 | sig_wr.wr.sg_list = &rdma_wr->ib_sg[DATA]; | |
2676 | sig_wr.wr.num_sge = 1; | |
2677 | sig_wr.access_flags = IB_ACCESS_LOCAL_WRITE; | |
2678 | sig_wr.sig_attrs = &sig_attrs; | |
2679 | sig_wr.sig_mr = pi_ctx->sig_mr; | |
9e961ae7 | 2680 | if (se_cmd->t_prot_sg) |
e622f2f4 | 2681 | sig_wr.prot = &rdma_wr->ib_sg[PROT]; |
9e961ae7 SG |
2682 | |
2683 | if (!wr) | |
e622f2f4 | 2684 | wr = &sig_wr.wr; |
9e961ae7 | 2685 | else |
e622f2f4 | 2686 | wr->next = &sig_wr.wr; |
9e961ae7 | 2687 | |
dac6ab30 | 2688 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
9e961ae7 | 2689 | if (ret) { |
24f412dd | 2690 | isert_err("fast registration failed, ret:%d\n", ret); |
9e961ae7 SG |
2691 | goto err; |
2692 | } | |
2693 | fr_desc->ind &= ~ISERT_SIG_KEY_VALID; | |
2694 | ||
570db170 SG |
2695 | rdma_wr->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey; |
2696 | rdma_wr->ib_sg[SIG].addr = 0; | |
2697 | rdma_wr->ib_sg[SIG].length = se_cmd->data_length; | |
9e961ae7 SG |
2698 | if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && |
2699 | se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) | |
2700 | /* | |
2701 | * We have protection guards on the wire | |
2702 | * so we need to set a larget transfer | |
2703 | */ | |
570db170 | 2704 | rdma_wr->ib_sg[SIG].length += se_cmd->prot_length; |
9e961ae7 | 2705 | |
24f412dd | 2706 | isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n", |
570db170 SG |
2707 | rdma_wr->ib_sg[SIG].addr, rdma_wr->ib_sg[SIG].length, |
2708 | rdma_wr->ib_sg[SIG].lkey); | |
9e961ae7 | 2709 | err: |
59464ef4 VP |
2710 | return ret; |
2711 | } | |
2712 | ||
570db170 SG |
2713 | static int |
2714 | isert_handle_prot_cmd(struct isert_conn *isert_conn, | |
2715 | struct isert_cmd *isert_cmd, | |
2716 | struct isert_rdma_wr *wr) | |
2717 | { | |
dac6ab30 | 2718 | struct isert_device *device = isert_conn->device; |
570db170 SG |
2719 | struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd; |
2720 | int ret; | |
2721 | ||
2722 | if (!wr->fr_desc->pi_ctx) { | |
2723 | ret = isert_create_pi_ctx(wr->fr_desc, | |
2724 | device->ib_device, | |
67cb3949 | 2725 | device->pd); |
570db170 | 2726 | if (ret) { |
24f412dd | 2727 | isert_err("conn %p failed to allocate pi_ctx\n", |
570db170 SG |
2728 | isert_conn); |
2729 | return ret; | |
2730 | } | |
2731 | } | |
2732 | ||
2733 | if (se_cmd->t_prot_sg) { | |
2734 | ret = isert_map_data_buf(isert_conn, isert_cmd, | |
2735 | se_cmd->t_prot_sg, | |
2736 | se_cmd->t_prot_nents, | |
2737 | se_cmd->prot_length, | |
2738 | 0, wr->iser_ib_op, &wr->prot); | |
2739 | if (ret) { | |
24f412dd | 2740 | isert_err("conn %p failed to map protection buffer\n", |
570db170 SG |
2741 | isert_conn); |
2742 | return ret; | |
2743 | } | |
2744 | ||
2745 | memset(&wr->ib_sg[PROT], 0, sizeof(wr->ib_sg[PROT])); | |
2746 | ret = isert_fast_reg_mr(isert_conn, wr->fr_desc, &wr->prot, | |
2747 | ISERT_PROT_KEY_VALID, &wr->ib_sg[PROT]); | |
2748 | if (ret) { | |
24f412dd | 2749 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2750 | isert_conn); |
2751 | goto unmap_prot_cmd; | |
2752 | } | |
2753 | } | |
2754 | ||
2755 | ret = isert_reg_sig_mr(isert_conn, se_cmd, wr, wr->fr_desc); | |
2756 | if (ret) { | |
24f412dd | 2757 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2758 | isert_conn); |
2759 | goto unmap_prot_cmd; | |
2760 | } | |
2761 | wr->fr_desc->ind |= ISERT_PROTECTED; | |
2762 | ||
2763 | return 0; | |
2764 | ||
2765 | unmap_prot_cmd: | |
2766 | if (se_cmd->t_prot_sg) | |
2767 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
2768 | ||
2769 | return ret; | |
2770 | } | |
2771 | ||
59464ef4 | 2772 | static int |
a3a5a826 SG |
2773 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2774 | struct isert_rdma_wr *wr) | |
59464ef4 VP |
2775 | { |
2776 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
2777 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
e3d7e4c3 | 2778 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2779 | struct fast_reg_descriptor *fr_desc = NULL; |
e622f2f4 | 2780 | struct ib_rdma_wr *rdma_wr; |
570db170 | 2781 | struct ib_sge *ib_sg; |
e3d7e4c3 SG |
2782 | u32 offset; |
2783 | int ret = 0; | |
59464ef4 VP |
2784 | unsigned long flags; |
2785 | ||
e3d7e4c3 | 2786 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
59464ef4 | 2787 | |
e3d7e4c3 SG |
2788 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2789 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2790 | se_cmd->t_data_nents, se_cmd->data_length, | |
2791 | offset, wr->iser_ib_op, &wr->data); | |
2792 | if (ret) | |
2793 | return ret; | |
59464ef4 | 2794 | |
302cc7c3 | 2795 | if (wr->data.dma_nents != 1 || isert_prot_cmd(isert_conn, se_cmd)) { |
dac6ab30 SG |
2796 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2797 | fr_desc = list_first_entry(&isert_conn->fr_pool, | |
e3d7e4c3 SG |
2798 | struct fast_reg_descriptor, list); |
2799 | list_del(&fr_desc->list); | |
dac6ab30 | 2800 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); |
e3d7e4c3 | 2801 | wr->fr_desc = fr_desc; |
59464ef4 | 2802 | } |
59464ef4 | 2803 | |
9e961ae7 | 2804 | ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, |
570db170 | 2805 | ISERT_DATA_KEY_VALID, &wr->ib_sg[DATA]); |
e3d7e4c3 SG |
2806 | if (ret) |
2807 | goto unmap_cmd; | |
59464ef4 | 2808 | |
302cc7c3 | 2809 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
570db170 | 2810 | ret = isert_handle_prot_cmd(isert_conn, isert_cmd, wr); |
9e961ae7 | 2811 | if (ret) |
570db170 | 2812 | goto unmap_cmd; |
9e961ae7 | 2813 | |
570db170 SG |
2814 | ib_sg = &wr->ib_sg[SIG]; |
2815 | } else { | |
2816 | ib_sg = &wr->ib_sg[DATA]; | |
2817 | } | |
9e961ae7 | 2818 | |
570db170 | 2819 | memcpy(&wr->s_ib_sge, ib_sg, sizeof(*ib_sg)); |
e3d7e4c3 | 2820 | wr->ib_sge = &wr->s_ib_sge; |
e622f2f4 CH |
2821 | wr->rdma_wr_num = 1; |
2822 | memset(&wr->s_rdma_wr, 0, sizeof(wr->s_rdma_wr)); | |
2823 | wr->rdma_wr = &wr->s_rdma_wr; | |
59464ef4 | 2824 | wr->isert_cmd = isert_cmd; |
59464ef4 | 2825 | |
e622f2f4 CH |
2826 | rdma_wr = &isert_cmd->rdma_wr.s_rdma_wr; |
2827 | rdma_wr->wr.sg_list = &wr->s_ib_sge; | |
2828 | rdma_wr->wr.num_sge = 1; | |
2829 | rdma_wr->wr.wr_id = (uintptr_t)&isert_cmd->tx_desc; | |
59464ef4 | 2830 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
e622f2f4 CH |
2831 | rdma_wr->wr.opcode = IB_WR_RDMA_WRITE; |
2832 | rdma_wr->remote_addr = isert_cmd->read_va; | |
2833 | rdma_wr->rkey = isert_cmd->read_stag; | |
2834 | rdma_wr->wr.send_flags = !isert_prot_cmd(isert_conn, se_cmd) ? | |
9e961ae7 | 2835 | 0 : IB_SEND_SIGNALED; |
59464ef4 | 2836 | } else { |
e622f2f4 CH |
2837 | rdma_wr->wr.opcode = IB_WR_RDMA_READ; |
2838 | rdma_wr->remote_addr = isert_cmd->write_va; | |
2839 | rdma_wr->rkey = isert_cmd->write_stag; | |
2840 | rdma_wr->wr.send_flags = IB_SEND_SIGNALED; | |
59464ef4 VP |
2841 | } |
2842 | ||
e3d7e4c3 | 2843 | return 0; |
570db170 | 2844 | |
e3d7e4c3 SG |
2845 | unmap_cmd: |
2846 | if (fr_desc) { | |
dac6ab30 SG |
2847 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2848 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); | |
2849 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); | |
59464ef4 | 2850 | } |
e3d7e4c3 | 2851 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 | 2852 | |
59464ef4 VP |
2853 | return ret; |
2854 | } | |
2855 | ||
90ecc6e2 VP |
2856 | static int |
2857 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2858 | { | |
2859 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2860 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
90ecc6e2 | 2861 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2862 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2863 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2864 | struct ib_send_wr *wr_failed; |
2865 | int rc; | |
2866 | ||
24f412dd | 2867 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2868 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2869 | |
90ecc6e2 | 2870 | wr->iser_ib_op = ISER_IB_RDMA_WRITE; |
d40945d8 | 2871 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2872 | if (rc) { |
24f412dd | 2873 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 VP |
2874 | return rc; |
2875 | } | |
2876 | ||
302cc7c3 | 2877 | if (!isert_prot_cmd(isert_conn, se_cmd)) { |
9e961ae7 SG |
2878 | /* |
2879 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2880 | */ | |
2881 | isert_create_send_desc(isert_conn, isert_cmd, | |
2882 | &isert_cmd->tx_desc); | |
2883 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2884 | &isert_cmd->tx_desc.iscsi_header); | |
2885 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2886 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2887 | &isert_cmd->tx_desc.send_wr); |
e622f2f4 CH |
2888 | isert_cmd->rdma_wr.s_rdma_wr.wr.next = &isert_cmd->tx_desc.send_wr; |
2889 | wr->rdma_wr_num += 1; | |
4366b19c JD |
2890 | |
2891 | rc = isert_post_recv(isert_conn, isert_cmd->rx_desc); | |
2892 | if (rc) { | |
2893 | isert_err("ib_post_recv failed with %d\n", rc); | |
2894 | return rc; | |
2895 | } | |
9e961ae7 | 2896 | } |
b8d26b3b | 2897 | |
e622f2f4 | 2898 | rc = ib_post_send(isert_conn->qp, &wr->rdma_wr->wr, &wr_failed); |
bdf20e72 | 2899 | if (rc) |
24f412dd | 2900 | isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); |
9e961ae7 | 2901 | |
302cc7c3 | 2902 | if (!isert_prot_cmd(isert_conn, se_cmd)) |
24f412dd | 2903 | isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data " |
9e961ae7 SG |
2904 | "READ\n", isert_cmd); |
2905 | else | |
24f412dd | 2906 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", |
9e961ae7 | 2907 | isert_cmd); |
b8d26b3b | 2908 | |
90ecc6e2 | 2909 | return 1; |
b8d26b3b NB |
2910 | } |
2911 | ||
2912 | static int | |
2913 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2914 | { | |
2915 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2916 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 2917 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2918 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2919 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2920 | struct ib_send_wr *wr_failed; |
2921 | int rc; | |
b8d26b3b | 2922 | |
24f412dd | 2923 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
90ecc6e2 | 2924 | isert_cmd, se_cmd->data_length, cmd->write_data_done); |
b8d26b3b | 2925 | wr->iser_ib_op = ISER_IB_RDMA_READ; |
d40945d8 | 2926 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2927 | if (rc) { |
24f412dd | 2928 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 | 2929 | return rc; |
b8d26b3b NB |
2930 | } |
2931 | ||
e622f2f4 | 2932 | rc = ib_post_send(isert_conn->qp, &wr->rdma_wr->wr, &wr_failed); |
bdf20e72 | 2933 | if (rc) |
24f412dd | 2934 | isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); |
bdf20e72 | 2935 | |
24f412dd | 2936 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", |
90ecc6e2 | 2937 | isert_cmd); |
b8d26b3b | 2938 | |
90ecc6e2 | 2939 | return 0; |
b8d26b3b NB |
2940 | } |
2941 | ||
2942 | static int | |
2943 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2944 | { | |
a4c15cd9 JD |
2945 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
2946 | int ret = 0; | |
b8d26b3b NB |
2947 | |
2948 | switch (state) { | |
a4c15cd9 JD |
2949 | case ISTATE_REMOVE: |
2950 | spin_lock_bh(&conn->cmd_lock); | |
2951 | list_del_init(&cmd->i_conn_node); | |
2952 | spin_unlock_bh(&conn->cmd_lock); | |
2953 | isert_put_cmd(isert_cmd, true); | |
2954 | break; | |
b8d26b3b NB |
2955 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: |
2956 | ret = isert_put_nopin(cmd, conn, false); | |
2957 | break; | |
2958 | default: | |
24f412dd | 2959 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
2960 | ret = -EINVAL; |
2961 | break; | |
2962 | } | |
2963 | ||
2964 | return ret; | |
2965 | } | |
2966 | ||
2967 | static int | |
2968 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2969 | { | |
991bb764 | 2970 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2971 | int ret; |
2972 | ||
2973 | switch (state) { | |
2974 | case ISTATE_SEND_LOGOUTRSP: | |
2975 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
2976 | if (!ret) |
2977 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
2978 | break; |
2979 | case ISTATE_SEND_NOPIN: | |
2980 | ret = isert_put_nopin(cmd, conn, true); | |
2981 | break; | |
2982 | case ISTATE_SEND_TASKMGTRSP: | |
2983 | ret = isert_put_tm_rsp(cmd, conn); | |
2984 | break; | |
2985 | case ISTATE_SEND_REJECT: | |
2986 | ret = isert_put_reject(cmd, conn); | |
2987 | break; | |
adb54c29 NB |
2988 | case ISTATE_SEND_TEXTRSP: |
2989 | ret = isert_put_text_rsp(cmd, conn); | |
2990 | break; | |
b8d26b3b NB |
2991 | case ISTATE_SEND_STATUS: |
2992 | /* | |
2993 | * Special case for sending non GOOD SCSI status from TX thread | |
2994 | * context during pre se_cmd excecution failure. | |
2995 | */ | |
2996 | ret = isert_put_response(conn, cmd); | |
2997 | break; | |
2998 | default: | |
24f412dd | 2999 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
3000 | ret = -EINVAL; |
3001 | break; | |
3002 | } | |
3003 | ||
3004 | return ret; | |
3005 | } | |
3006 | ||
ca6c1d82 SG |
3007 | struct rdma_cm_id * |
3008 | isert_setup_id(struct isert_np *isert_np) | |
3009 | { | |
3010 | struct iscsi_np *np = isert_np->np; | |
3011 | struct rdma_cm_id *id; | |
3012 | struct sockaddr *sa; | |
3013 | int ret; | |
3014 | ||
3015 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 3016 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 | 3017 | |
fa20105e | 3018 | id = rdma_create_id(&init_net, isert_cma_handler, isert_np, |
ca6c1d82 SG |
3019 | RDMA_PS_TCP, IB_QPT_RC); |
3020 | if (IS_ERR(id)) { | |
24f412dd | 3021 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
3022 | ret = PTR_ERR(id); |
3023 | goto out; | |
3024 | } | |
24f412dd | 3025 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 SG |
3026 | |
3027 | ret = rdma_bind_addr(id, sa); | |
3028 | if (ret) { | |
24f412dd | 3029 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
3030 | goto out_id; |
3031 | } | |
3032 | ||
992607e8 | 3033 | ret = rdma_listen(id, 0); |
ca6c1d82 | 3034 | if (ret) { |
24f412dd | 3035 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
3036 | goto out_id; |
3037 | } | |
3038 | ||
3039 | return id; | |
3040 | out_id: | |
3041 | rdma_destroy_id(id); | |
3042 | out: | |
3043 | return ERR_PTR(ret); | |
3044 | } | |
3045 | ||
b8d26b3b NB |
3046 | static int |
3047 | isert_setup_np(struct iscsi_np *np, | |
13a3cf08 | 3048 | struct sockaddr_storage *ksockaddr) |
b8d26b3b NB |
3049 | { |
3050 | struct isert_np *isert_np; | |
3051 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
3052 | int ret; |
3053 | ||
3054 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
3055 | if (!isert_np) { | |
24f412dd | 3056 | isert_err("Unable to allocate struct isert_np\n"); |
b8d26b3b NB |
3057 | return -ENOMEM; |
3058 | } | |
ed8cb0a4 JD |
3059 | sema_init(&isert_np->sem, 0); |
3060 | mutex_init(&isert_np->mutex); | |
bd379220 JD |
3061 | INIT_LIST_HEAD(&isert_np->accepted); |
3062 | INIT_LIST_HEAD(&isert_np->pending); | |
ca6c1d82 | 3063 | isert_np->np = np; |
b8d26b3b | 3064 | |
b8d26b3b NB |
3065 | /* |
3066 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
3067 | * in iscsi_target_configfs.c code.. | |
3068 | */ | |
3069 | memcpy(&np->np_sockaddr, ksockaddr, | |
13a3cf08 | 3070 | sizeof(struct sockaddr_storage)); |
b8d26b3b | 3071 | |
ca6c1d82 | 3072 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 3073 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
3074 | ret = PTR_ERR(isert_lid); |
3075 | goto out; | |
3076 | } | |
3077 | ||
ed8cb0a4 | 3078 | isert_np->cm_id = isert_lid; |
b8d26b3b | 3079 | np->np_context = isert_np; |
b8d26b3b NB |
3080 | |
3081 | return 0; | |
3082 | ||
b8d26b3b NB |
3083 | out: |
3084 | kfree(isert_np); | |
ca6c1d82 | 3085 | |
b8d26b3b NB |
3086 | return ret; |
3087 | } | |
3088 | ||
b8d26b3b NB |
3089 | static int |
3090 | isert_rdma_accept(struct isert_conn *isert_conn) | |
3091 | { | |
dac6ab30 | 3092 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
3093 | struct rdma_conn_param cp; |
3094 | int ret; | |
3095 | ||
3096 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
3097 | cp.initiator_depth = isert_conn->initiator_depth; |
3098 | cp.retry_count = 7; | |
3099 | cp.rnr_retry_count = 7; | |
3100 | ||
b8d26b3b NB |
3101 | ret = rdma_accept(cm_id, &cp); |
3102 | if (ret) { | |
24f412dd | 3103 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
3104 | return ret; |
3105 | } | |
3106 | ||
b8d26b3b NB |
3107 | return 0; |
3108 | } | |
3109 | ||
3110 | static int | |
3111 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
3112 | { | |
6700425e | 3113 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
3114 | int ret; |
3115 | ||
24f412dd | 3116 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
3117 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
3118 | if (ret) { | |
24f412dd | 3119 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
3120 | isert_conn); |
3121 | return ret; | |
3122 | } | |
3123 | reinit_completion(&isert_conn->login_req_comp); | |
3124 | ||
6faaa85f NB |
3125 | /* |
3126 | * For login requests after the first PDU, isert_rx_login_req() will | |
3127 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
3128 | * received, which turns this callback from iscsi_target_do_login_rx() | |
3129 | * into a NOP. | |
3130 | */ | |
3131 | if (!login->first_request) | |
3132 | return 0; | |
b8d26b3b | 3133 | |
2371e5da SG |
3134 | isert_rx_login_req(isert_conn); |
3135 | ||
dac6ab30 SG |
3136 | isert_info("before login_comp conn: %p\n", conn); |
3137 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
3138 | if (ret) |
3139 | return ret; | |
3140 | ||
24f412dd | 3141 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 3142 | |
b8d26b3b NB |
3143 | return 0; |
3144 | } | |
3145 | ||
3146 | static void | |
3147 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
3148 | struct isert_conn *isert_conn) | |
3149 | { | |
dac6ab30 | 3150 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b | 3151 | struct rdma_route *cm_route = &cm_id->route; |
b8d26b3b NB |
3152 | |
3153 | conn->login_family = np->np_sockaddr.ss_family; | |
3154 | ||
dc58f760 AG |
3155 | conn->login_sockaddr = cm_route->addr.dst_addr; |
3156 | conn->local_sockaddr = cm_route->addr.src_addr; | |
b8d26b3b NB |
3157 | } |
3158 | ||
3159 | static int | |
3160 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
3161 | { | |
6700425e | 3162 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 3163 | struct isert_conn *isert_conn; |
c6b8e918 | 3164 | int ret; |
b8d26b3b NB |
3165 | |
3166 | accept_wait: | |
ed8cb0a4 | 3167 | ret = down_interruptible(&isert_np->sem); |
c6b8e918 | 3168 | if (ret) |
b8d26b3b NB |
3169 | return -ENODEV; |
3170 | ||
3171 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 3172 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 3173 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 3174 | isert_dbg("np_thread_state %d\n", |
e346ab34 SG |
3175 | np->np_thread_state); |
3176 | /** | |
3177 | * No point in stalling here when np_thread | |
3178 | * is in state RESET/SHUTDOWN/EXIT - bail | |
3179 | **/ | |
b8d26b3b NB |
3180 | return -ENODEV; |
3181 | } | |
3182 | spin_unlock_bh(&np->np_thread_lock); | |
3183 | ||
ed8cb0a4 | 3184 | mutex_lock(&isert_np->mutex); |
bd379220 | 3185 | if (list_empty(&isert_np->pending)) { |
ed8cb0a4 | 3186 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
3187 | goto accept_wait; |
3188 | } | |
bd379220 JD |
3189 | isert_conn = list_first_entry(&isert_np->pending, |
3190 | struct isert_conn, node); | |
3191 | list_del_init(&isert_conn->node); | |
ed8cb0a4 | 3192 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
3193 | |
3194 | conn->context = isert_conn; | |
3195 | isert_conn->conn = conn; | |
b8d26b3b | 3196 | |
b8d26b3b NB |
3197 | isert_set_conn_info(np, conn, isert_conn); |
3198 | ||
24f412dd | 3199 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 3200 | |
b8d26b3b NB |
3201 | return 0; |
3202 | } | |
3203 | ||
3204 | static void | |
3205 | isert_free_np(struct iscsi_np *np) | |
3206 | { | |
6700425e | 3207 | struct isert_np *isert_np = np->np_context; |
268e6811 | 3208 | struct isert_conn *isert_conn, *n; |
b8d26b3b | 3209 | |
ed8cb0a4 JD |
3210 | if (isert_np->cm_id) |
3211 | rdma_destroy_id(isert_np->cm_id); | |
b8d26b3b | 3212 | |
268e6811 SG |
3213 | /* |
3214 | * FIXME: At this point we don't have a good way to insure | |
3215 | * that at this point we don't have hanging connections that | |
3216 | * completed RDMA establishment but didn't start iscsi login | |
3217 | * process. So work-around this by cleaning up what ever piled | |
bd379220 | 3218 | * up in accepted and pending lists. |
268e6811 | 3219 | */ |
ed8cb0a4 | 3220 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
3221 | if (!list_empty(&isert_np->pending)) { |
3222 | isert_info("Still have isert pending connections\n"); | |
3223 | list_for_each_entry_safe(isert_conn, n, | |
3224 | &isert_np->pending, | |
3225 | node) { | |
3226 | isert_info("cleaning isert_conn %p state (%d)\n", | |
3227 | isert_conn, isert_conn->state); | |
3228 | isert_connect_release(isert_conn); | |
3229 | } | |
3230 | } | |
3231 | ||
3232 | if (!list_empty(&isert_np->accepted)) { | |
3233 | isert_info("Still have isert accepted connections\n"); | |
268e6811 | 3234 | list_for_each_entry_safe(isert_conn, n, |
bd379220 JD |
3235 | &isert_np->accepted, |
3236 | node) { | |
24f412dd | 3237 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 SG |
3238 | isert_conn, isert_conn->state); |
3239 | isert_connect_release(isert_conn); | |
3240 | } | |
3241 | } | |
ed8cb0a4 | 3242 | mutex_unlock(&isert_np->mutex); |
268e6811 | 3243 | |
b8d26b3b NB |
3244 | np->np_context = NULL; |
3245 | kfree(isert_np); | |
3246 | } | |
3247 | ||
b02efbfc SG |
3248 | static void isert_release_work(struct work_struct *work) |
3249 | { | |
3250 | struct isert_conn *isert_conn = container_of(work, | |
3251 | struct isert_conn, | |
3252 | release_work); | |
3253 | ||
24f412dd | 3254 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 3255 | |
dac6ab30 | 3256 | wait_for_completion(&isert_conn->wait); |
b02efbfc | 3257 | |
dac6ab30 | 3258 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 3259 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 3260 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 3261 | |
24f412dd | 3262 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
3263 | isert_put_conn(isert_conn); |
3264 | } | |
3265 | ||
991bb764 SG |
3266 | static void |
3267 | isert_wait4logout(struct isert_conn *isert_conn) | |
3268 | { | |
3269 | struct iscsi_conn *conn = isert_conn->conn; | |
3270 | ||
4c22e07f SG |
3271 | isert_info("conn %p\n", isert_conn); |
3272 | ||
991bb764 | 3273 | if (isert_conn->logout_posted) { |
24f412dd | 3274 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
3275 | wait_for_completion_timeout(&conn->conn_logout_comp, |
3276 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3277 | } | |
3278 | } | |
3279 | ||
c7e160ee SG |
3280 | static void |
3281 | isert_wait4cmds(struct iscsi_conn *conn) | |
3282 | { | |
4c22e07f SG |
3283 | isert_info("iscsi_conn %p\n", conn); |
3284 | ||
c7e160ee SG |
3285 | if (conn->sess) { |
3286 | target_sess_cmd_list_set_waiting(conn->sess->se_sess); | |
3287 | target_wait_for_sess_cmds(conn->sess->se_sess); | |
3288 | } | |
3289 | } | |
3290 | ||
bdf20e72 SG |
3291 | static void |
3292 | isert_wait4flush(struct isert_conn *isert_conn) | |
3293 | { | |
3294 | struct ib_recv_wr *bad_wr; | |
3295 | ||
4c22e07f SG |
3296 | isert_info("conn %p\n", isert_conn); |
3297 | ||
dac6ab30 | 3298 | init_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3299 | isert_conn->beacon.wr_id = ISER_BEACON_WRID; |
3300 | /* post an indication that all flush errors were consumed */ | |
dac6ab30 | 3301 | if (ib_post_recv(isert_conn->qp, &isert_conn->beacon, &bad_wr)) { |
24f412dd | 3302 | isert_err("conn %p failed to post beacon", isert_conn); |
bdf20e72 SG |
3303 | return; |
3304 | } | |
3305 | ||
dac6ab30 | 3306 | wait_for_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3307 | } |
3308 | ||
3e03c4b0 JD |
3309 | /** |
3310 | * isert_put_unsol_pending_cmds() - Drop commands waiting for | |
3311 | * unsolicitate dataout | |
3312 | * @conn: iscsi connection | |
3313 | * | |
3314 | * We might still have commands that are waiting for unsolicited | |
3315 | * dataouts messages. We must put the extra reference on those | |
3316 | * before blocking on the target_wait_for_session_cmds | |
3317 | */ | |
3318 | static void | |
3319 | isert_put_unsol_pending_cmds(struct iscsi_conn *conn) | |
3320 | { | |
3321 | struct iscsi_cmd *cmd, *tmp; | |
3322 | static LIST_HEAD(drop_cmd_list); | |
3323 | ||
3324 | spin_lock_bh(&conn->cmd_lock); | |
3325 | list_for_each_entry_safe(cmd, tmp, &conn->conn_cmd_list, i_conn_node) { | |
3326 | if ((cmd->cmd_flags & ICF_NON_IMMEDIATE_UNSOLICITED_DATA) && | |
3327 | (cmd->write_data_done < conn->sess->sess_ops->FirstBurstLength) && | |
3328 | (cmd->write_data_done < cmd->se_cmd.data_length)) | |
3329 | list_move_tail(&cmd->i_conn_node, &drop_cmd_list); | |
3330 | } | |
3331 | spin_unlock_bh(&conn->cmd_lock); | |
3332 | ||
3333 | list_for_each_entry_safe(cmd, tmp, &drop_cmd_list, i_conn_node) { | |
3334 | list_del_init(&cmd->i_conn_node); | |
3335 | if (cmd->i_state != ISTATE_REMOVE) { | |
3336 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
3337 | ||
3338 | isert_info("conn %p dropping cmd %p\n", conn, cmd); | |
3339 | isert_put_cmd(isert_cmd, true); | |
3340 | } | |
3341 | } | |
3342 | } | |
3343 | ||
defd8848 | 3344 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
3345 | { |
3346 | struct isert_conn *isert_conn = conn->context; | |
3347 | ||
4c22e07f | 3348 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 3349 | |
dac6ab30 | 3350 | mutex_lock(&isert_conn->mutex); |
b8d26b3b | 3351 | /* |
dac6ab30 | 3352 | * Only wait for wait_comp_err if the isert_conn made it |
b8d26b3b NB |
3353 | * into full feature phase.. |
3354 | */ | |
b2cb9649 | 3355 | if (isert_conn->state == ISER_CONN_INIT) { |
dac6ab30 | 3356 | mutex_unlock(&isert_conn->mutex); |
b2cb9649 | 3357 | return; |
b8d26b3b | 3358 | } |
954f2372 | 3359 | isert_conn_terminate(isert_conn); |
dac6ab30 | 3360 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 3361 | |
bdf20e72 | 3362 | isert_wait4flush(isert_conn); |
3e03c4b0 JD |
3363 | isert_put_unsol_pending_cmds(conn); |
3364 | isert_wait4cmds(conn); | |
991bb764 | 3365 | isert_wait4logout(isert_conn); |
954f2372 | 3366 | |
b02efbfc | 3367 | queue_work(isert_release_wq, &isert_conn->release_work); |
defd8848 NB |
3368 | } |
3369 | ||
3370 | static void isert_free_conn(struct iscsi_conn *conn) | |
3371 | { | |
3372 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b | 3373 | |
524630d5 | 3374 | isert_wait4flush(isert_conn); |
b8d26b3b NB |
3375 | isert_put_conn(isert_conn); |
3376 | } | |
3377 | ||
3378 | static struct iscsit_transport iser_target_transport = { | |
3379 | .name = "IB/iSER", | |
3380 | .transport_type = ISCSI_INFINIBAND, | |
d703ce2f | 3381 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
3382 | .owner = THIS_MODULE, |
3383 | .iscsit_setup_np = isert_setup_np, | |
3384 | .iscsit_accept_np = isert_accept_np, | |
3385 | .iscsit_free_np = isert_free_np, | |
defd8848 | 3386 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 3387 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
3388 | .iscsit_get_login_rx = isert_get_login_rx, |
3389 | .iscsit_put_login_tx = isert_put_login_tx, | |
3390 | .iscsit_immediate_queue = isert_immediate_queue, | |
3391 | .iscsit_response_queue = isert_response_queue, | |
3392 | .iscsit_get_dataout = isert_get_dataout, | |
3393 | .iscsit_queue_data_in = isert_put_datain, | |
3394 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 3395 | .iscsit_aborted_task = isert_aborted_task, |
e70beee7 | 3396 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
3397 | }; |
3398 | ||
3399 | static int __init isert_init(void) | |
3400 | { | |
3401 | int ret; | |
3402 | ||
631af550 SG |
3403 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
3404 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 3405 | if (!isert_comp_wq) { |
24f412dd | 3406 | isert_err("Unable to allocate isert_comp_wq\n"); |
b8d26b3b | 3407 | ret = -ENOMEM; |
6f0fae3d | 3408 | return -ENOMEM; |
b8d26b3b NB |
3409 | } |
3410 | ||
b02efbfc SG |
3411 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
3412 | WQ_UNBOUND_MAX_ACTIVE); | |
3413 | if (!isert_release_wq) { | |
24f412dd | 3414 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
3415 | ret = -ENOMEM; |
3416 | goto destroy_comp_wq; | |
3417 | } | |
3418 | ||
b8d26b3b | 3419 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 3420 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 3421 | |
b8d26b3b NB |
3422 | return 0; |
3423 | ||
b02efbfc SG |
3424 | destroy_comp_wq: |
3425 | destroy_workqueue(isert_comp_wq); | |
6f0fae3d | 3426 | |
b8d26b3b NB |
3427 | return ret; |
3428 | } | |
3429 | ||
3430 | static void __exit isert_exit(void) | |
3431 | { | |
f5ebec96 | 3432 | flush_scheduled_work(); |
b02efbfc | 3433 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 3434 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 3435 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 3436 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
b8d26b3b NB |
3437 | } |
3438 | ||
3439 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
9e35eff4 | 3440 | MODULE_VERSION("1.0"); |
b8d26b3b NB |
3441 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
3442 | MODULE_LICENSE("GPL"); | |
3443 | ||
3444 | module_init(isert_init); | |
3445 | module_exit(isert_exit); |