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b8d26b3b NB |
1 | /******************************************************************************* |
2 | * This file contains iSCSI extentions for RDMA (iSER) Verbs | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2013 Datera, Inc. |
b8d26b3b NB |
5 | * |
6 | * Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ****************************************************************************/ | |
18 | ||
19 | #include <linux/string.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/scatterlist.h> | |
22 | #include <linux/socket.h> | |
23 | #include <linux/in.h> | |
24 | #include <linux/in6.h> | |
25 | #include <rdma/ib_verbs.h> | |
26 | #include <rdma/rdma_cm.h> | |
27 | #include <target/target_core_base.h> | |
28 | #include <target/target_core_fabric.h> | |
29 | #include <target/iscsi/iscsi_transport.h> | |
531b7bf4 | 30 | #include <linux/semaphore.h> |
b8d26b3b | 31 | |
b8d26b3b NB |
32 | #include "ib_isert.h" |
33 | ||
34 | #define ISERT_MAX_CONN 8 | |
35 | #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN) | |
36 | #define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * ISERT_MAX_CONN) | |
bdf20e72 SG |
37 | #define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \ |
38 | ISERT_MAX_CONN) | |
b8d26b3b | 39 | |
45678b6b | 40 | static int isert_debug_level; |
24f412dd SG |
41 | module_param_named(debug_level, isert_debug_level, int, 0644); |
42 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)"); | |
43 | ||
b8d26b3b NB |
44 | static DEFINE_MUTEX(device_list_mutex); |
45 | static LIST_HEAD(device_list); | |
b8d26b3b | 46 | static struct workqueue_struct *isert_comp_wq; |
b02efbfc | 47 | static struct workqueue_struct *isert_release_wq; |
b8d26b3b | 48 | |
d40945d8 VP |
49 | static void |
50 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); | |
51 | static int | |
52 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
53 | struct isert_rdma_wr *wr); | |
59464ef4 | 54 | static void |
a3a5a826 | 55 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); |
59464ef4 | 56 | static int |
a3a5a826 SG |
57 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
58 | struct isert_rdma_wr *wr); | |
f93f3a70 SG |
59 | static int |
60 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); | |
2371e5da SG |
61 | static int |
62 | isert_rdma_post_recvl(struct isert_conn *isert_conn); | |
63 | static int | |
64 | isert_rdma_accept(struct isert_conn *isert_conn); | |
ca6c1d82 | 65 | struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); |
d40945d8 | 66 | |
2f1b6b7d SG |
67 | static void isert_release_work(struct work_struct *work); |
68 | ||
302cc7c3 SG |
69 | static inline bool |
70 | isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) | |
71 | { | |
23a548ee | 72 | return (conn->pi_support && |
302cc7c3 SG |
73 | cmd->prot_op != TARGET_PROT_NORMAL); |
74 | } | |
75 | ||
76 | ||
b8d26b3b NB |
77 | static void |
78 | isert_qp_event_callback(struct ib_event *e, void *context) | |
79 | { | |
6700425e | 80 | struct isert_conn *isert_conn = context; |
b8d26b3b | 81 | |
ea8a1616 SG |
82 | isert_err("%s (%d): conn %p\n", |
83 | ib_event_msg(e->event), e->event, isert_conn); | |
84 | ||
b8d26b3b NB |
85 | switch (e->event) { |
86 | case IB_EVENT_COMM_EST: | |
dac6ab30 | 87 | rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST); |
b8d26b3b NB |
88 | break; |
89 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
4c22e07f | 90 | isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); |
b8d26b3b NB |
91 | break; |
92 | default: | |
93 | break; | |
94 | } | |
95 | } | |
96 | ||
40fc069a SG |
97 | static struct isert_comp * |
98 | isert_comp_get(struct isert_conn *isert_conn) | |
b8d26b3b | 99 | { |
dac6ab30 | 100 | struct isert_device *device = isert_conn->device; |
4a295bae | 101 | struct isert_comp *comp; |
40fc069a | 102 | int i, min = 0; |
b8d26b3b | 103 | |
b8d26b3b | 104 | mutex_lock(&device_list_mutex); |
4a295bae SG |
105 | for (i = 0; i < device->comps_used; i++) |
106 | if (device->comps[i].active_qps < | |
107 | device->comps[min].active_qps) | |
108 | min = i; | |
109 | comp = &device->comps[min]; | |
110 | comp->active_qps++; | |
40fc069a SG |
111 | mutex_unlock(&device_list_mutex); |
112 | ||
24f412dd | 113 | isert_info("conn %p, using comp %p min_index: %d\n", |
4a295bae | 114 | isert_conn, comp, min); |
40fc069a SG |
115 | |
116 | return comp; | |
117 | } | |
118 | ||
119 | static void | |
120 | isert_comp_put(struct isert_comp *comp) | |
121 | { | |
122 | mutex_lock(&device_list_mutex); | |
123 | comp->active_qps--; | |
b8d26b3b | 124 | mutex_unlock(&device_list_mutex); |
40fc069a SG |
125 | } |
126 | ||
127 | static struct ib_qp * | |
128 | isert_create_qp(struct isert_conn *isert_conn, | |
129 | struct isert_comp *comp, | |
130 | struct rdma_cm_id *cma_id) | |
131 | { | |
dac6ab30 | 132 | struct isert_device *device = isert_conn->device; |
40fc069a SG |
133 | struct ib_qp_init_attr attr; |
134 | int ret; | |
b8d26b3b NB |
135 | |
136 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); | |
137 | attr.event_handler = isert_qp_event_callback; | |
138 | attr.qp_context = isert_conn; | |
6f0fae3d SG |
139 | attr.send_cq = comp->cq; |
140 | attr.recv_cq = comp->cq; | |
b8d26b3b | 141 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; |
bdf20e72 | 142 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; |
4a061b28 OG |
143 | attr.cap.max_send_sge = device->ib_device->attrs.max_sge; |
144 | isert_conn->max_sge = min(device->ib_device->attrs.max_sge, | |
145 | device->ib_device->attrs.max_sge_rd); | |
b8d26b3b NB |
146 | attr.cap.max_recv_sge = 1; |
147 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
148 | attr.qp_type = IB_QPT_RC; | |
570db170 | 149 | if (device->pi_capable) |
d3e125da | 150 | attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; |
b8d26b3b | 151 | |
67cb3949 | 152 | ret = rdma_create_qp(cma_id, device->pd, &attr); |
b8d26b3b | 153 | if (ret) { |
24f412dd | 154 | isert_err("rdma_create_qp failed for cma_id %d\n", ret); |
40fc069a SG |
155 | return ERR_PTR(ret); |
156 | } | |
157 | ||
158 | return cma_id->qp; | |
159 | } | |
160 | ||
161 | static int | |
162 | isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) | |
163 | { | |
164 | struct isert_comp *comp; | |
165 | int ret; | |
166 | ||
167 | comp = isert_comp_get(isert_conn); | |
dac6ab30 SG |
168 | isert_conn->qp = isert_create_qp(isert_conn, comp, cma_id); |
169 | if (IS_ERR(isert_conn->qp)) { | |
170 | ret = PTR_ERR(isert_conn->qp); | |
19e2090f | 171 | goto err; |
b8d26b3b | 172 | } |
b8d26b3b NB |
173 | |
174 | return 0; | |
19e2090f | 175 | err: |
40fc069a | 176 | isert_comp_put(comp); |
19e2090f | 177 | return ret; |
b8d26b3b NB |
178 | } |
179 | ||
180 | static void | |
181 | isert_cq_event_callback(struct ib_event *e, void *context) | |
182 | { | |
4c22e07f | 183 | isert_dbg("event: %d\n", e->event); |
b8d26b3b NB |
184 | } |
185 | ||
186 | static int | |
187 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
188 | { | |
dac6ab30 | 189 | struct isert_device *device = isert_conn->device; |
67cb3949 | 190 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
191 | struct iser_rx_desc *rx_desc; |
192 | struct ib_sge *rx_sg; | |
193 | u64 dma_addr; | |
194 | int i, j; | |
195 | ||
dac6ab30 | 196 | isert_conn->rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * |
b8d26b3b | 197 | sizeof(struct iser_rx_desc), GFP_KERNEL); |
dac6ab30 | 198 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
199 | goto fail; |
200 | ||
dac6ab30 | 201 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
202 | |
203 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
204 | dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, | |
205 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
206 | if (ib_dma_mapping_error(ib_dev, dma_addr)) | |
207 | goto dma_map_fail; | |
208 | ||
209 | rx_desc->dma_addr = dma_addr; | |
210 | ||
211 | rx_sg = &rx_desc->rx_sg; | |
212 | rx_sg->addr = rx_desc->dma_addr; | |
213 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; | |
34efc7df | 214 | rx_sg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
215 | } |
216 | ||
b8d26b3b NB |
217 | return 0; |
218 | ||
219 | dma_map_fail: | |
dac6ab30 | 220 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
221 | for (j = 0; j < i; j++, rx_desc++) { |
222 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
223 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
224 | } | |
dac6ab30 SG |
225 | kfree(isert_conn->rx_descs); |
226 | isert_conn->rx_descs = NULL; | |
b8d26b3b | 227 | fail: |
4c22e07f SG |
228 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
229 | ||
b8d26b3b NB |
230 | return -ENOMEM; |
231 | } | |
232 | ||
233 | static void | |
234 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
235 | { | |
dac6ab30 | 236 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
237 | struct iser_rx_desc *rx_desc; |
238 | int i; | |
239 | ||
dac6ab30 | 240 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
241 | return; |
242 | ||
dac6ab30 | 243 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
244 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
245 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
246 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
247 | } | |
248 | ||
dac6ab30 SG |
249 | kfree(isert_conn->rx_descs); |
250 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
251 | } |
252 | ||
6f0fae3d SG |
253 | static void isert_cq_work(struct work_struct *); |
254 | static void isert_cq_callback(struct ib_cq *, void *); | |
b8d26b3b | 255 | |
172369c5 SG |
256 | static void |
257 | isert_free_comps(struct isert_device *device) | |
b8d26b3b | 258 | { |
172369c5 | 259 | int i; |
59464ef4 | 260 | |
172369c5 SG |
261 | for (i = 0; i < device->comps_used; i++) { |
262 | struct isert_comp *comp = &device->comps[i]; | |
b1a5ad00 | 263 | |
172369c5 SG |
264 | if (comp->cq) { |
265 | cancel_work_sync(&comp->work); | |
266 | ib_destroy_cq(comp->cq); | |
267 | } | |
59464ef4 | 268 | } |
172369c5 SG |
269 | kfree(device->comps); |
270 | } | |
d40945d8 | 271 | |
172369c5 | 272 | static int |
4a061b28 | 273 | isert_alloc_comps(struct isert_device *device) |
172369c5 SG |
274 | { |
275 | int i, max_cqe, ret = 0; | |
d3e125da | 276 | |
4a295bae | 277 | device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), |
172369c5 SG |
278 | device->ib_device->num_comp_vectors)); |
279 | ||
24f412dd | 280 | isert_info("Using %d CQs, %s supports %d vectors support " |
4a295bae SG |
281 | "Fast registration %d pi_capable %d\n", |
282 | device->comps_used, device->ib_device->name, | |
283 | device->ib_device->num_comp_vectors, device->use_fastreg, | |
284 | device->pi_capable); | |
285 | ||
286 | device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), | |
287 | GFP_KERNEL); | |
288 | if (!device->comps) { | |
24f412dd | 289 | isert_err("Unable to allocate completion contexts\n"); |
b8d26b3b NB |
290 | return -ENOMEM; |
291 | } | |
4a295bae | 292 | |
4a061b28 | 293 | max_cqe = min(ISER_MAX_CQ_LEN, device->ib_device->attrs.max_cqe); |
172369c5 | 294 | |
4a295bae | 295 | for (i = 0; i < device->comps_used; i++) { |
8e37210b | 296 | struct ib_cq_init_attr cq_attr = {}; |
4a295bae SG |
297 | struct isert_comp *comp = &device->comps[i]; |
298 | ||
299 | comp->device = device; | |
6f0fae3d | 300 | INIT_WORK(&comp->work, isert_cq_work); |
8e37210b MB |
301 | cq_attr.cqe = max_cqe; |
302 | cq_attr.comp_vector = i; | |
6f0fae3d SG |
303 | comp->cq = ib_create_cq(device->ib_device, |
304 | isert_cq_callback, | |
305 | isert_cq_event_callback, | |
306 | (void *)comp, | |
8e37210b | 307 | &cq_attr); |
6f0fae3d | 308 | if (IS_ERR(comp->cq)) { |
172369c5 | 309 | isert_err("Unable to allocate cq\n"); |
6f0fae3d SG |
310 | ret = PTR_ERR(comp->cq); |
311 | comp->cq = NULL; | |
b8d26b3b | 312 | goto out_cq; |
94a71110 | 313 | } |
b8d26b3b | 314 | |
6f0fae3d | 315 | ret = ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
94a71110 | 316 | if (ret) |
b8d26b3b NB |
317 | goto out_cq; |
318 | } | |
319 | ||
172369c5 SG |
320 | return 0; |
321 | out_cq: | |
322 | isert_free_comps(device); | |
323 | return ret; | |
324 | } | |
325 | ||
326 | static int | |
327 | isert_create_device_ib_res(struct isert_device *device) | |
328 | { | |
4a061b28 | 329 | struct ib_device *ib_dev = device->ib_device; |
fd8205e8 | 330 | int ret; |
172369c5 | 331 | |
4a061b28 OG |
332 | isert_dbg("devattr->max_sge: %d\n", ib_dev->attrs.max_sge); |
333 | isert_dbg("devattr->max_sge_rd: %d\n", ib_dev->attrs.max_sge_rd); | |
172369c5 SG |
334 | |
335 | /* asign function handlers */ | |
4a061b28 OG |
336 | if (ib_dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS && |
337 | ib_dev->attrs.device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) { | |
172369c5 SG |
338 | device->use_fastreg = 1; |
339 | device->reg_rdma_mem = isert_reg_rdma; | |
340 | device->unreg_rdma_mem = isert_unreg_rdma; | |
341 | } else { | |
342 | device->use_fastreg = 0; | |
343 | device->reg_rdma_mem = isert_map_rdma; | |
344 | device->unreg_rdma_mem = isert_unmap_cmd; | |
345 | } | |
346 | ||
4a061b28 | 347 | ret = isert_alloc_comps(device); |
172369c5 | 348 | if (ret) |
373a4cd7 | 349 | goto out; |
172369c5 | 350 | |
4a061b28 | 351 | device->pd = ib_alloc_pd(ib_dev); |
67cb3949 SG |
352 | if (IS_ERR(device->pd)) { |
353 | ret = PTR_ERR(device->pd); | |
354 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
355 | device, ret); | |
356 | goto out_cq; | |
357 | } | |
358 | ||
172369c5 | 359 | /* Check signature cap */ |
4a061b28 | 360 | device->pi_capable = ib_dev->attrs.device_cap_flags & |
172369c5 | 361 | IB_DEVICE_SIGNATURE_HANDOVER ? true : false; |
67cb3949 | 362 | |
b8d26b3b NB |
363 | return 0; |
364 | ||
365 | out_cq: | |
172369c5 | 366 | isert_free_comps(device); |
373a4cd7 NB |
367 | out: |
368 | if (ret > 0) | |
369 | ret = -EINVAL; | |
b8d26b3b NB |
370 | return ret; |
371 | } | |
372 | ||
373 | static void | |
374 | isert_free_device_ib_res(struct isert_device *device) | |
375 | { | |
24f412dd | 376 | isert_info("device %p\n", device); |
b8d26b3b | 377 | |
67cb3949 | 378 | ib_dealloc_pd(device->pd); |
172369c5 | 379 | isert_free_comps(device); |
b8d26b3b NB |
380 | } |
381 | ||
382 | static void | |
cf8ae958 | 383 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
384 | { |
385 | mutex_lock(&device_list_mutex); | |
386 | device->refcount--; | |
4c22e07f | 387 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
388 | if (!device->refcount) { |
389 | isert_free_device_ib_res(device); | |
390 | list_del(&device->dev_node); | |
391 | kfree(device); | |
392 | } | |
393 | mutex_unlock(&device_list_mutex); | |
394 | } | |
395 | ||
396 | static struct isert_device * | |
cf8ae958 | 397 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
398 | { |
399 | struct isert_device *device; | |
400 | int ret; | |
401 | ||
402 | mutex_lock(&device_list_mutex); | |
403 | list_for_each_entry(device, &device_list, dev_node) { | |
404 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
405 | device->refcount++; | |
4c22e07f SG |
406 | isert_info("Found iser device %p refcount %d\n", |
407 | device, device->refcount); | |
b8d26b3b NB |
408 | mutex_unlock(&device_list_mutex); |
409 | return device; | |
410 | } | |
411 | } | |
412 | ||
413 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
414 | if (!device) { | |
415 | mutex_unlock(&device_list_mutex); | |
416 | return ERR_PTR(-ENOMEM); | |
417 | } | |
418 | ||
419 | INIT_LIST_HEAD(&device->dev_node); | |
420 | ||
421 | device->ib_device = cma_id->device; | |
422 | ret = isert_create_device_ib_res(device); | |
423 | if (ret) { | |
424 | kfree(device); | |
425 | mutex_unlock(&device_list_mutex); | |
426 | return ERR_PTR(ret); | |
427 | } | |
428 | ||
429 | device->refcount++; | |
430 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
431 | isert_info("Created a new iser device %p refcount %d\n", |
432 | device, device->refcount); | |
b8d26b3b NB |
433 | mutex_unlock(&device_list_mutex); |
434 | ||
435 | return device; | |
436 | } | |
437 | ||
59464ef4 | 438 | static void |
a3a5a826 | 439 | isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
440 | { |
441 | struct fast_reg_descriptor *fr_desc, *tmp; | |
442 | int i = 0; | |
443 | ||
dac6ab30 | 444 | if (list_empty(&isert_conn->fr_pool)) |
59464ef4 VP |
445 | return; |
446 | ||
4c22e07f | 447 | isert_info("Freeing conn %p fastreg pool", isert_conn); |
59464ef4 VP |
448 | |
449 | list_for_each_entry_safe(fr_desc, tmp, | |
dac6ab30 | 450 | &isert_conn->fr_pool, list) { |
59464ef4 | 451 | list_del(&fr_desc->list); |
59464ef4 | 452 | ib_dereg_mr(fr_desc->data_mr); |
d3e125da | 453 | if (fr_desc->pi_ctx) { |
d3e125da | 454 | ib_dereg_mr(fr_desc->pi_ctx->prot_mr); |
8b91ffc1 | 455 | ib_dereg_mr(fr_desc->pi_ctx->sig_mr); |
d3e125da SG |
456 | kfree(fr_desc->pi_ctx); |
457 | } | |
59464ef4 VP |
458 | kfree(fr_desc); |
459 | ++i; | |
460 | } | |
461 | ||
dac6ab30 | 462 | if (i < isert_conn->fr_pool_size) |
24f412dd | 463 | isert_warn("Pool still has %d regions registered\n", |
dac6ab30 | 464 | isert_conn->fr_pool_size - i); |
59464ef4 VP |
465 | } |
466 | ||
570db170 SG |
467 | static int |
468 | isert_create_pi_ctx(struct fast_reg_descriptor *desc, | |
469 | struct ib_device *device, | |
470 | struct ib_pd *pd) | |
471 | { | |
570db170 SG |
472 | struct pi_context *pi_ctx; |
473 | int ret; | |
474 | ||
475 | pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL); | |
476 | if (!pi_ctx) { | |
24f412dd | 477 | isert_err("Failed to allocate pi context\n"); |
570db170 SG |
478 | return -ENOMEM; |
479 | } | |
480 | ||
a89be2cc SG |
481 | pi_ctx->prot_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, |
482 | ISCSI_ISER_SG_TABLESIZE); | |
570db170 | 483 | if (IS_ERR(pi_ctx->prot_mr)) { |
24f412dd | 484 | isert_err("Failed to allocate prot frmr err=%ld\n", |
570db170 SG |
485 | PTR_ERR(pi_ctx->prot_mr)); |
486 | ret = PTR_ERR(pi_ctx->prot_mr); | |
16c2d702 | 487 | goto err_pi_ctx; |
570db170 SG |
488 | } |
489 | desc->ind |= ISERT_PROT_KEY_VALID; | |
490 | ||
9bee178b | 491 | pi_ctx->sig_mr = ib_alloc_mr(pd, IB_MR_TYPE_SIGNATURE, 2); |
570db170 | 492 | if (IS_ERR(pi_ctx->sig_mr)) { |
24f412dd | 493 | isert_err("Failed to allocate signature enabled mr err=%ld\n", |
570db170 SG |
494 | PTR_ERR(pi_ctx->sig_mr)); |
495 | ret = PTR_ERR(pi_ctx->sig_mr); | |
496 | goto err_prot_mr; | |
497 | } | |
498 | ||
499 | desc->pi_ctx = pi_ctx; | |
500 | desc->ind |= ISERT_SIG_KEY_VALID; | |
501 | desc->ind &= ~ISERT_PROTECTED; | |
502 | ||
503 | return 0; | |
504 | ||
505 | err_prot_mr: | |
b2feda4f | 506 | ib_dereg_mr(pi_ctx->prot_mr); |
570db170 | 507 | err_pi_ctx: |
b2feda4f | 508 | kfree(pi_ctx); |
570db170 SG |
509 | |
510 | return ret; | |
511 | } | |
512 | ||
dc87a90f SG |
513 | static int |
514 | isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, | |
570db170 | 515 | struct fast_reg_descriptor *fr_desc) |
dc87a90f | 516 | { |
a89be2cc SG |
517 | fr_desc->data_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, |
518 | ISCSI_ISER_SG_TABLESIZE); | |
dc87a90f | 519 | if (IS_ERR(fr_desc->data_mr)) { |
24f412dd | 520 | isert_err("Failed to allocate data frmr err=%ld\n", |
4c22e07f | 521 | PTR_ERR(fr_desc->data_mr)); |
16c2d702 | 522 | return PTR_ERR(fr_desc->data_mr); |
dc87a90f | 523 | } |
d3e125da SG |
524 | fr_desc->ind |= ISERT_DATA_KEY_VALID; |
525 | ||
24f412dd | 526 | isert_dbg("Created fr_desc %p\n", fr_desc); |
dc87a90f SG |
527 | |
528 | return 0; | |
59464ef4 VP |
529 | } |
530 | ||
531 | static int | |
570db170 | 532 | isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
533 | { |
534 | struct fast_reg_descriptor *fr_desc; | |
dac6ab30 | 535 | struct isert_device *device = isert_conn->device; |
f46d6a8a NB |
536 | struct se_session *se_sess = isert_conn->conn->sess->se_sess; |
537 | struct se_node_acl *se_nacl = se_sess->se_node_acl; | |
538 | int i, ret, tag_num; | |
539 | /* | |
540 | * Setup the number of FRMRs based upon the number of tags | |
541 | * available to session in iscsi_target_locate_portal(). | |
542 | */ | |
543 | tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth); | |
544 | tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; | |
59464ef4 | 545 | |
dac6ab30 | 546 | isert_conn->fr_pool_size = 0; |
f46d6a8a | 547 | for (i = 0; i < tag_num; i++) { |
59464ef4 VP |
548 | fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); |
549 | if (!fr_desc) { | |
24f412dd | 550 | isert_err("Failed to allocate fast_reg descriptor\n"); |
59464ef4 VP |
551 | ret = -ENOMEM; |
552 | goto err; | |
553 | } | |
554 | ||
dc87a90f | 555 | ret = isert_create_fr_desc(device->ib_device, |
67cb3949 | 556 | device->pd, fr_desc); |
dc87a90f | 557 | if (ret) { |
24f412dd | 558 | isert_err("Failed to create fastreg descriptor err=%d\n", |
dc87a90f | 559 | ret); |
a80e21b3 | 560 | kfree(fr_desc); |
59464ef4 VP |
561 | goto err; |
562 | } | |
59464ef4 | 563 | |
dac6ab30 SG |
564 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); |
565 | isert_conn->fr_pool_size++; | |
59464ef4 VP |
566 | } |
567 | ||
24f412dd | 568 | isert_dbg("Creating conn %p fastreg pool size=%d", |
dac6ab30 | 569 | isert_conn, isert_conn->fr_pool_size); |
59464ef4 VP |
570 | |
571 | return 0; | |
572 | ||
573 | err: | |
a3a5a826 | 574 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 VP |
575 | return ret; |
576 | } | |
577 | ||
ae9ea9ed SG |
578 | static void |
579 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 580 | { |
b8d26b3b | 581 | isert_conn->state = ISER_CONN_INIT; |
bd379220 | 582 | INIT_LIST_HEAD(&isert_conn->node); |
dac6ab30 | 583 | init_completion(&isert_conn->login_comp); |
2371e5da | 584 | init_completion(&isert_conn->login_req_comp); |
dac6ab30 SG |
585 | init_completion(&isert_conn->wait); |
586 | kref_init(&isert_conn->kref); | |
587 | mutex_init(&isert_conn->mutex); | |
588 | spin_lock_init(&isert_conn->pool_lock); | |
589 | INIT_LIST_HEAD(&isert_conn->fr_pool); | |
2f1b6b7d | 590 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
ae9ea9ed | 591 | } |
b8d26b3b | 592 | |
ae9ea9ed SG |
593 | static void |
594 | isert_free_login_buf(struct isert_conn *isert_conn) | |
595 | { | |
dac6ab30 | 596 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
597 | |
598 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
599 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
600 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
601 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
602 | DMA_FROM_DEVICE); | |
603 | kfree(isert_conn->login_buf); | |
604 | } | |
605 | ||
606 | static int | |
607 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
608 | struct ib_device *ib_dev) | |
609 | { | |
610 | int ret; | |
b8d26b3b NB |
611 | |
612 | isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + | |
613 | ISER_RX_LOGIN_SIZE, GFP_KERNEL); | |
614 | if (!isert_conn->login_buf) { | |
24f412dd | 615 | isert_err("Unable to allocate isert_conn->login_buf\n"); |
ae9ea9ed | 616 | return -ENOMEM; |
b8d26b3b NB |
617 | } |
618 | ||
619 | isert_conn->login_req_buf = isert_conn->login_buf; | |
620 | isert_conn->login_rsp_buf = isert_conn->login_buf + | |
621 | ISCSI_DEF_MAX_RECV_SEG_LEN; | |
ae9ea9ed | 622 | |
24f412dd | 623 | isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", |
b8d26b3b NB |
624 | isert_conn->login_buf, isert_conn->login_req_buf, |
625 | isert_conn->login_rsp_buf); | |
626 | ||
627 | isert_conn->login_req_dma = ib_dma_map_single(ib_dev, | |
628 | (void *)isert_conn->login_req_buf, | |
629 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
630 | ||
631 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); | |
632 | if (ret) { | |
ae9ea9ed | 633 | isert_err("login_req_dma mapping error: %d\n", ret); |
b8d26b3b NB |
634 | isert_conn->login_req_dma = 0; |
635 | goto out_login_buf; | |
636 | } | |
637 | ||
638 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
639 | (void *)isert_conn->login_rsp_buf, | |
640 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
641 | ||
642 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); | |
643 | if (ret) { | |
ae9ea9ed | 644 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b NB |
645 | isert_conn->login_rsp_dma = 0; |
646 | goto out_req_dma_map; | |
647 | } | |
648 | ||
ae9ea9ed SG |
649 | return 0; |
650 | ||
651 | out_req_dma_map: | |
652 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
653 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
654 | out_login_buf: | |
655 | kfree(isert_conn->login_buf); | |
656 | return ret; | |
657 | } | |
658 | ||
422bd0ac JD |
659 | static void |
660 | isert_set_nego_params(struct isert_conn *isert_conn, | |
661 | struct rdma_conn_param *param) | |
662 | { | |
663 | struct ib_device_attr *attr = &isert_conn->device->ib_device->attrs; | |
664 | ||
665 | /* Set max inflight RDMA READ requests */ | |
666 | isert_conn->initiator_depth = min_t(u8, param->initiator_depth, | |
667 | attr->max_qp_init_rd_atom); | |
668 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); | |
669 | ||
670 | if (param->private_data) { | |
671 | u8 flags = *(u8 *)param->private_data; | |
672 | ||
673 | /* | |
674 | * use remote invalidation if the both initiator | |
675 | * and the HCA support it | |
676 | */ | |
677 | isert_conn->snd_w_inv = !(flags & ISER_SEND_W_INV_NOT_SUP) && | |
678 | (attr->device_cap_flags & | |
679 | IB_DEVICE_MEM_MGT_EXTENSIONS); | |
680 | if (isert_conn->snd_w_inv) | |
681 | isert_info("Using remote invalidation\n"); | |
682 | } | |
683 | } | |
684 | ||
ae9ea9ed SG |
685 | static int |
686 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
687 | { | |
688 | struct isert_np *isert_np = cma_id->context; | |
689 | struct iscsi_np *np = isert_np->np; | |
690 | struct isert_conn *isert_conn; | |
691 | struct isert_device *device; | |
692 | int ret = 0; | |
693 | ||
694 | spin_lock_bh(&np->np_thread_lock); | |
695 | if (!np->enabled) { | |
696 | spin_unlock_bh(&np->np_thread_lock); | |
697 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
698 | return rdma_reject(cma_id, NULL, 0); | |
699 | } | |
700 | spin_unlock_bh(&np->np_thread_lock); | |
701 | ||
702 | isert_dbg("cma_id: %p, portal: %p\n", | |
703 | cma_id, cma_id->context); | |
704 | ||
705 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
706 | if (!isert_conn) | |
707 | return -ENOMEM; | |
708 | ||
709 | isert_init_conn(isert_conn); | |
dac6ab30 | 710 | isert_conn->cm_id = cma_id; |
ae9ea9ed SG |
711 | |
712 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); | |
713 | if (ret) | |
714 | goto out; | |
715 | ||
cf8ae958 | 716 | device = isert_device_get(cma_id); |
b8d26b3b NB |
717 | if (IS_ERR(device)) { |
718 | ret = PTR_ERR(device); | |
719 | goto out_rsp_dma_map; | |
720 | } | |
dac6ab30 | 721 | isert_conn->device = device; |
b8d26b3b | 722 | |
422bd0ac | 723 | isert_set_nego_params(isert_conn, &event->param.conn); |
1a92e17e | 724 | |
570db170 | 725 | ret = isert_conn_setup_qp(isert_conn, cma_id); |
b8d26b3b NB |
726 | if (ret) |
727 | goto out_conn_dev; | |
728 | ||
2371e5da SG |
729 | ret = isert_rdma_post_recvl(isert_conn); |
730 | if (ret) | |
731 | goto out_conn_dev; | |
732 | ||
733 | ret = isert_rdma_accept(isert_conn); | |
734 | if (ret) | |
735 | goto out_conn_dev; | |
736 | ||
ed8cb0a4 | 737 | mutex_lock(&isert_np->mutex); |
bd379220 | 738 | list_add_tail(&isert_conn->node, &isert_np->accepted); |
ed8cb0a4 | 739 | mutex_unlock(&isert_np->mutex); |
b8d26b3b | 740 | |
b8d26b3b NB |
741 | return 0; |
742 | ||
743 | out_conn_dev: | |
cf8ae958 | 744 | isert_device_put(device); |
b8d26b3b | 745 | out_rsp_dma_map: |
ae9ea9ed | 746 | isert_free_login_buf(isert_conn); |
b8d26b3b NB |
747 | out: |
748 | kfree(isert_conn); | |
2371e5da | 749 | rdma_reject(cma_id, NULL, 0); |
b8d26b3b NB |
750 | return ret; |
751 | } | |
752 | ||
753 | static void | |
754 | isert_connect_release(struct isert_conn *isert_conn) | |
755 | { | |
dac6ab30 | 756 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 757 | |
4c22e07f | 758 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 759 | |
57df81e3 SG |
760 | BUG_ON(!device); |
761 | ||
762 | if (device->use_fastreg) | |
a3a5a826 | 763 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 | 764 | |
19e2090f | 765 | isert_free_rx_descriptors(isert_conn); |
dac6ab30 SG |
766 | if (isert_conn->cm_id) |
767 | rdma_destroy_id(isert_conn->cm_id); | |
19e2090f | 768 | |
dac6ab30 SG |
769 | if (isert_conn->qp) { |
770 | struct isert_comp *comp = isert_conn->qp->recv_cq->cq_context; | |
4a295bae | 771 | |
40fc069a | 772 | isert_comp_put(comp); |
dac6ab30 | 773 | ib_destroy_qp(isert_conn->qp); |
b8d26b3b NB |
774 | } |
775 | ||
ae9ea9ed SG |
776 | if (isert_conn->login_buf) |
777 | isert_free_login_buf(isert_conn); | |
778 | ||
57df81e3 | 779 | isert_device_put(device); |
b8d26b3b | 780 | |
57df81e3 | 781 | kfree(isert_conn); |
b8d26b3b NB |
782 | } |
783 | ||
784 | static void | |
785 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
786 | { | |
19e2090f | 787 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
bd379220 | 788 | struct isert_np *isert_np = cma_id->context; |
c2f88b17 | 789 | |
24f412dd | 790 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 791 | |
dac6ab30 | 792 | mutex_lock(&isert_conn->mutex); |
bd379220 JD |
793 | isert_conn->state = ISER_CONN_UP; |
794 | kref_get(&isert_conn->kref); | |
dac6ab30 | 795 | mutex_unlock(&isert_conn->mutex); |
bd379220 JD |
796 | |
797 | mutex_lock(&isert_np->mutex); | |
798 | list_move_tail(&isert_conn->node, &isert_np->pending); | |
799 | mutex_unlock(&isert_np->mutex); | |
800 | ||
801 | isert_info("np %p: Allow accept_np to continue\n", isert_np); | |
802 | up(&isert_np->sem); | |
b8d26b3b NB |
803 | } |
804 | ||
805 | static void | |
dac6ab30 | 806 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
807 | { |
808 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 809 | struct isert_conn, kref); |
b8d26b3b | 810 | |
4c22e07f SG |
811 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
812 | current->pid); | |
b8d26b3b NB |
813 | |
814 | isert_connect_release(isert_conn); | |
815 | } | |
816 | ||
817 | static void | |
818 | isert_put_conn(struct isert_conn *isert_conn) | |
819 | { | |
dac6ab30 | 820 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
821 | } |
822 | ||
954f2372 SG |
823 | /** |
824 | * isert_conn_terminate() - Initiate connection termination | |
825 | * @isert_conn: isert connection struct | |
826 | * | |
827 | * Notes: | |
128e9cc8 | 828 | * In case the connection state is FULL_FEATURE, move state |
954f2372 | 829 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 830 | * In case the connection state is UP, complete flush as well. |
954f2372 | 831 | * |
dac6ab30 | 832 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
833 | * safe to call multiple times. |
834 | */ | |
835 | static void | |
836 | isert_conn_terminate(struct isert_conn *isert_conn) | |
837 | { | |
838 | int err; | |
839 | ||
128e9cc8 SG |
840 | switch (isert_conn->state) { |
841 | case ISER_CONN_TERMINATING: | |
842 | break; | |
843 | case ISER_CONN_UP: | |
128e9cc8 | 844 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ |
24f412dd | 845 | isert_info("Terminating conn %p state %d\n", |
954f2372 | 846 | isert_conn, isert_conn->state); |
128e9cc8 | 847 | isert_conn->state = ISER_CONN_TERMINATING; |
dac6ab30 | 848 | err = rdma_disconnect(isert_conn->cm_id); |
954f2372 | 849 | if (err) |
24f412dd | 850 | isert_warn("Failed rdma_disconnect isert_conn %p\n", |
954f2372 | 851 | isert_conn); |
128e9cc8 SG |
852 | break; |
853 | default: | |
24f412dd | 854 | isert_warn("conn %p teminating in state %d\n", |
128e9cc8 | 855 | isert_conn, isert_conn->state); |
954f2372 SG |
856 | } |
857 | } | |
858 | ||
3b726ae2 | 859 | static int |
ca6c1d82 SG |
860 | isert_np_cma_handler(struct isert_np *isert_np, |
861 | enum rdma_cm_event_type event) | |
b8d26b3b | 862 | { |
ea8a1616 SG |
863 | isert_dbg("%s (%d): isert np %p\n", |
864 | rdma_event_msg(event), event, isert_np); | |
3b726ae2 | 865 | |
ca6c1d82 SG |
866 | switch (event) { |
867 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
ed8cb0a4 | 868 | isert_np->cm_id = NULL; |
ca6c1d82 SG |
869 | break; |
870 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
ed8cb0a4 JD |
871 | isert_np->cm_id = isert_setup_id(isert_np); |
872 | if (IS_ERR(isert_np->cm_id)) { | |
24f412dd | 873 | isert_err("isert np %p setup id failed: %ld\n", |
ed8cb0a4 JD |
874 | isert_np, PTR_ERR(isert_np->cm_id)); |
875 | isert_np->cm_id = NULL; | |
ca6c1d82 SG |
876 | } |
877 | break; | |
878 | default: | |
24f412dd | 879 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 880 | isert_np, event); |
3b726ae2 SG |
881 | } |
882 | ||
ca6c1d82 SG |
883 | return -1; |
884 | } | |
885 | ||
886 | static int | |
887 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
888 | enum rdma_cm_event_type event) | |
889 | { | |
890 | struct isert_np *isert_np = cma_id->context; | |
891 | struct isert_conn *isert_conn; | |
2f1b6b7d | 892 | bool terminating = false; |
ca6c1d82 | 893 | |
ed8cb0a4 | 894 | if (isert_np->cm_id == cma_id) |
ca6c1d82 SG |
895 | return isert_np_cma_handler(cma_id->context, event); |
896 | ||
19e2090f | 897 | isert_conn = cma_id->qp->qp_context; |
b8d26b3b | 898 | |
dac6ab30 | 899 | mutex_lock(&isert_conn->mutex); |
2f1b6b7d | 900 | terminating = (isert_conn->state == ISER_CONN_TERMINATING); |
128e9cc8 | 901 | isert_conn_terminate(isert_conn); |
dac6ab30 | 902 | mutex_unlock(&isert_conn->mutex); |
128e9cc8 | 903 | |
dac6ab30 SG |
904 | isert_info("conn %p completing wait\n", isert_conn); |
905 | complete(&isert_conn->wait); | |
3b726ae2 | 906 | |
2f1b6b7d SG |
907 | if (terminating) |
908 | goto out; | |
909 | ||
ed8cb0a4 | 910 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
911 | if (!list_empty(&isert_conn->node)) { |
912 | list_del_init(&isert_conn->node); | |
2f1b6b7d SG |
913 | isert_put_conn(isert_conn); |
914 | queue_work(isert_release_wq, &isert_conn->release_work); | |
915 | } | |
ed8cb0a4 | 916 | mutex_unlock(&isert_np->mutex); |
2f1b6b7d SG |
917 | |
918 | out: | |
3b726ae2 | 919 | return 0; |
b8d26b3b NB |
920 | } |
921 | ||
4a579da2 | 922 | static int |
954f2372 SG |
923 | isert_connect_error(struct rdma_cm_id *cma_id) |
924 | { | |
19e2090f | 925 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
954f2372 | 926 | |
bd379220 | 927 | list_del_init(&isert_conn->node); |
dac6ab30 | 928 | isert_conn->cm_id = NULL; |
954f2372 | 929 | isert_put_conn(isert_conn); |
4a579da2 SG |
930 | |
931 | return -1; | |
954f2372 SG |
932 | } |
933 | ||
b8d26b3b NB |
934 | static int |
935 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
936 | { | |
937 | int ret = 0; | |
938 | ||
ea8a1616 SG |
939 | isert_info("%s (%d): status %d id %p np %p\n", |
940 | rdma_event_msg(event->event), event->event, | |
4c22e07f | 941 | event->status, cma_id, cma_id->context); |
b8d26b3b NB |
942 | |
943 | switch (event->event) { | |
944 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
b8d26b3b | 945 | ret = isert_connect_request(cma_id, event); |
3b726ae2 | 946 | if (ret) |
4c22e07f | 947 | isert_err("failed handle connect request %d\n", ret); |
b8d26b3b NB |
948 | break; |
949 | case RDMA_CM_EVENT_ESTABLISHED: | |
b8d26b3b NB |
950 | isert_connected_handler(cma_id); |
951 | break; | |
88c4015f SG |
952 | case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ |
953 | case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ | |
954 | case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */ | |
88c4015f | 955 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 956 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 957 | break; |
954f2372 SG |
958 | case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ |
959 | case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ | |
b8d26b3b | 960 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 961 | ret = isert_connect_error(cma_id); |
954f2372 | 962 | break; |
b8d26b3b | 963 | default: |
24f412dd | 964 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
965 | break; |
966 | } | |
967 | ||
b8d26b3b NB |
968 | return ret; |
969 | } | |
970 | ||
971 | static int | |
4366b19c | 972 | isert_post_recvm(struct isert_conn *isert_conn, u32 count) |
b8d26b3b NB |
973 | { |
974 | struct ib_recv_wr *rx_wr, *rx_wr_failed; | |
975 | int i, ret; | |
b8d26b3b NB |
976 | struct iser_rx_desc *rx_desc; |
977 | ||
dac6ab30 | 978 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
4366b19c JD |
979 | rx_desc = &isert_conn->rx_descs[i]; |
980 | rx_wr->wr_id = (uintptr_t)rx_desc; | |
981 | rx_wr->sg_list = &rx_desc->rx_sg; | |
982 | rx_wr->num_sge = 1; | |
983 | rx_wr->next = rx_wr + 1; | |
b8d26b3b | 984 | } |
b8d26b3b NB |
985 | rx_wr--; |
986 | rx_wr->next = NULL; /* mark end of work requests list */ | |
987 | ||
988 | isert_conn->post_recv_buf_count += count; | |
dac6ab30 | 989 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, |
4366b19c | 990 | &rx_wr_failed); |
b8d26b3b | 991 | if (ret) { |
24f412dd | 992 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
b8d26b3b | 993 | isert_conn->post_recv_buf_count -= count; |
b8d26b3b | 994 | } |
4366b19c JD |
995 | |
996 | return ret; | |
997 | } | |
998 | ||
999 | static int | |
1000 | isert_post_recv(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc) | |
1001 | { | |
1002 | struct ib_recv_wr *rx_wr_failed, rx_wr; | |
1003 | int ret; | |
1004 | ||
1005 | rx_wr.wr_id = (uintptr_t)rx_desc; | |
1006 | rx_wr.sg_list = &rx_desc->rx_sg; | |
1007 | rx_wr.num_sge = 1; | |
1008 | rx_wr.next = NULL; | |
1009 | ||
1010 | isert_conn->post_recv_buf_count++; | |
1011 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_failed); | |
1012 | if (ret) { | |
1013 | isert_err("ib_post_recv() failed with ret: %d\n", ret); | |
1014 | isert_conn->post_recv_buf_count--; | |
1015 | } | |
1016 | ||
b8d26b3b NB |
1017 | return ret; |
1018 | } | |
1019 | ||
1020 | static int | |
1021 | isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) | |
1022 | { | |
dac6ab30 | 1023 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1024 | struct ib_send_wr send_wr, *send_wr_failed; |
1025 | int ret; | |
1026 | ||
1027 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
1028 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1029 | ||
1030 | send_wr.next = NULL; | |
b0a191e7 | 1031 | send_wr.wr_id = (uintptr_t)tx_desc; |
b8d26b3b NB |
1032 | send_wr.sg_list = tx_desc->tx_sg; |
1033 | send_wr.num_sge = tx_desc->num_sge; | |
1034 | send_wr.opcode = IB_WR_SEND; | |
1035 | send_wr.send_flags = IB_SEND_SIGNALED; | |
1036 | ||
dac6ab30 | 1037 | ret = ib_post_send(isert_conn->qp, &send_wr, &send_wr_failed); |
bdf20e72 | 1038 | if (ret) |
24f412dd | 1039 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
1040 | |
1041 | return ret; | |
1042 | } | |
1043 | ||
1044 | static void | |
1045 | isert_create_send_desc(struct isert_conn *isert_conn, | |
1046 | struct isert_cmd *isert_cmd, | |
1047 | struct iser_tx_desc *tx_desc) | |
1048 | { | |
dac6ab30 | 1049 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1050 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1051 | |
1052 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
1053 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1054 | ||
d3cf81f9 SG |
1055 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_ctrl)); |
1056 | tx_desc->iser_header.flags = ISCSI_CTRL; | |
b8d26b3b NB |
1057 | |
1058 | tx_desc->num_sge = 1; | |
1059 | tx_desc->isert_cmd = isert_cmd; | |
1060 | ||
34efc7df JG |
1061 | if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) { |
1062 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; | |
24f412dd | 1063 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
1064 | } |
1065 | } | |
1066 | ||
1067 | static int | |
1068 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
1069 | struct iser_tx_desc *tx_desc) | |
1070 | { | |
dac6ab30 | 1071 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1072 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1073 | u64 dma_addr; |
1074 | ||
1075 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
1076 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1077 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 1078 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
1079 | return -ENOMEM; |
1080 | } | |
1081 | ||
1082 | tx_desc->dma_addr = dma_addr; | |
1083 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
1084 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
34efc7df | 1085 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; |
b8d26b3b | 1086 | |
4c22e07f SG |
1087 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
1088 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
1089 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
1090 | |
1091 | return 0; | |
1092 | } | |
1093 | ||
1094 | static void | |
95b60f07 | 1095 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 1096 | struct ib_send_wr *send_wr) |
b8d26b3b | 1097 | { |
95b60f07 NB |
1098 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
1099 | ||
b8d26b3b | 1100 | isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; |
b0a191e7 | 1101 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
422bd0ac JD |
1102 | |
1103 | if (isert_conn->snd_w_inv && isert_cmd->inv_rkey) { | |
1104 | send_wr->opcode = IB_WR_SEND_WITH_INV; | |
1105 | send_wr->ex.invalidate_rkey = isert_cmd->inv_rkey; | |
1106 | } else { | |
1107 | send_wr->opcode = IB_WR_SEND; | |
1108 | } | |
1109 | ||
95b60f07 | 1110 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 1111 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 1112 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
1113 | } |
1114 | ||
1115 | static int | |
1116 | isert_rdma_post_recvl(struct isert_conn *isert_conn) | |
1117 | { | |
1118 | struct ib_recv_wr rx_wr, *rx_wr_fail; | |
1119 | struct ib_sge sge; | |
1120 | int ret; | |
1121 | ||
1122 | memset(&sge, 0, sizeof(struct ib_sge)); | |
1123 | sge.addr = isert_conn->login_req_dma; | |
1124 | sge.length = ISER_RX_LOGIN_SIZE; | |
34efc7df | 1125 | sge.lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b | 1126 | |
24f412dd | 1127 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
1128 | sge.addr, sge.length, sge.lkey); |
1129 | ||
1130 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); | |
b0a191e7 | 1131 | rx_wr.wr_id = (uintptr_t)isert_conn->login_req_buf; |
b8d26b3b NB |
1132 | rx_wr.sg_list = &sge; |
1133 | rx_wr.num_sge = 1; | |
1134 | ||
1135 | isert_conn->post_recv_buf_count++; | |
dac6ab30 | 1136 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_fail); |
b8d26b3b | 1137 | if (ret) { |
24f412dd | 1138 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b NB |
1139 | isert_conn->post_recv_buf_count--; |
1140 | } | |
1141 | ||
b8d26b3b NB |
1142 | return ret; |
1143 | } | |
1144 | ||
1145 | static int | |
1146 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1147 | u32 length) | |
1148 | { | |
1149 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 1150 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1151 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 1152 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
1153 | int ret; |
1154 | ||
1155 | isert_create_send_desc(isert_conn, NULL, tx_desc); | |
1156 | ||
1157 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
1158 | sizeof(struct iscsi_hdr)); | |
1159 | ||
1160 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
1161 | ||
1162 | if (length > 0) { | |
1163 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
1164 | ||
1165 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
1166 | length, DMA_TO_DEVICE); | |
1167 | ||
1168 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
1169 | ||
1170 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
1171 | length, DMA_TO_DEVICE); | |
1172 | ||
1173 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
1174 | tx_dsg->length = length; | |
34efc7df | 1175 | tx_dsg->lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b NB |
1176 | tx_desc->num_sge = 2; |
1177 | } | |
1178 | if (!login->login_failed) { | |
1179 | if (login->login_complete) { | |
e0546fc1 | 1180 | if (!conn->sess->sess_ops->SessionType && |
dac6ab30 | 1181 | isert_conn->device->use_fastreg) { |
570db170 | 1182 | ret = isert_conn_create_fastreg_pool(isert_conn); |
f46d6a8a | 1183 | if (ret) { |
24f412dd | 1184 | isert_err("Conn: %p failed to create" |
f46d6a8a NB |
1185 | " fastreg pool\n", isert_conn); |
1186 | return ret; | |
1187 | } | |
1188 | } | |
1189 | ||
b8d26b3b NB |
1190 | ret = isert_alloc_rx_descriptors(isert_conn); |
1191 | if (ret) | |
1192 | return ret; | |
1193 | ||
4366b19c JD |
1194 | ret = isert_post_recvm(isert_conn, |
1195 | ISERT_QP_MAX_RECV_DTOS); | |
b8d26b3b NB |
1196 | if (ret) |
1197 | return ret; | |
1198 | ||
128e9cc8 | 1199 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 1200 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 1201 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 1202 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
1203 | goto post_send; |
1204 | } | |
1205 | ||
1206 | ret = isert_rdma_post_recvl(isert_conn); | |
1207 | if (ret) | |
1208 | return ret; | |
1209 | } | |
1210 | post_send: | |
1211 | ret = isert_post_send(isert_conn, tx_desc); | |
1212 | if (ret) | |
1213 | return ret; | |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | static void | |
2371e5da | 1219 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 1220 | { |
2371e5da SG |
1221 | struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf; |
1222 | int rx_buflen = isert_conn->login_req_len; | |
b8d26b3b NB |
1223 | struct iscsi_conn *conn = isert_conn->conn; |
1224 | struct iscsi_login *login = conn->conn_login; | |
1225 | int size; | |
1226 | ||
24f412dd | 1227 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
1228 | |
1229 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
1230 | |
1231 | if (login->first_request) { | |
1232 | struct iscsi_login_req *login_req = | |
1233 | (struct iscsi_login_req *)&rx_desc->iscsi_header; | |
1234 | /* | |
1235 | * Setup the initial iscsi_login values from the leading | |
1236 | * login request PDU. | |
1237 | */ | |
1238 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
1239 | login->current_stage = | |
1240 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
1241 | >> 2; | |
1242 | login->version_min = login_req->min_version; | |
1243 | login->version_max = login_req->max_version; | |
1244 | memcpy(login->isid, login_req->isid, 6); | |
1245 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1246 | login->init_task_tag = login_req->itt; | |
1247 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1248 | login->cid = be16_to_cpu(login_req->cid); | |
1249 | login->tsih = be16_to_cpu(login_req->tsih); | |
1250 | } | |
1251 | ||
1252 | memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); | |
1253 | ||
1254 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1255 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1256 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1257 | MAX_KEY_VALUE_PAIRS); | |
b8d26b3b NB |
1258 | memcpy(login->req_buf, &rx_desc->data[0], size); |
1259 | ||
6faaa85f | 1260 | if (login->first_request) { |
dac6ab30 | 1261 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1262 | return; |
1263 | } | |
1264 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1265 | } |
1266 | ||
b8d26b3b | 1267 | static struct iscsi_cmd |
4366b19c | 1268 | *isert_allocate_cmd(struct iscsi_conn *conn, struct iser_rx_desc *rx_desc) |
b8d26b3b | 1269 | { |
6700425e | 1270 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1271 | struct isert_cmd *isert_cmd; |
d703ce2f | 1272 | struct iscsi_cmd *cmd; |
b8d26b3b | 1273 | |
676687c6 | 1274 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1275 | if (!cmd) { |
24f412dd | 1276 | isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); |
b8d26b3b NB |
1277 | return NULL; |
1278 | } | |
d703ce2f | 1279 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1280 | isert_cmd->conn = isert_conn; |
d703ce2f | 1281 | isert_cmd->iscsi_cmd = cmd; |
4366b19c | 1282 | isert_cmd->rx_desc = rx_desc; |
b8d26b3b | 1283 | |
d703ce2f | 1284 | return cmd; |
b8d26b3b NB |
1285 | } |
1286 | ||
1287 | static int | |
1288 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1289 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1290 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1291 | { |
b8d26b3b NB |
1292 | struct iscsi_conn *conn = isert_conn->conn; |
1293 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
b8d26b3b NB |
1294 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; |
1295 | bool dump_payload = false; | |
9fd60088 | 1296 | unsigned int data_len; |
b8d26b3b NB |
1297 | |
1298 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1299 | if (rc < 0) | |
1300 | return rc; | |
1301 | ||
1302 | imm_data = cmd->immediate_data; | |
1303 | imm_data_len = cmd->first_burst_len; | |
1304 | unsol_data = cmd->unsolicited_data; | |
9fd60088 | 1305 | data_len = cmd->se_cmd.data_length; |
b8d26b3b | 1306 | |
9fd60088 JD |
1307 | if (imm_data && imm_data_len == data_len) |
1308 | cmd->se_cmd.se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
b8d26b3b NB |
1309 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); |
1310 | if (rc < 0) { | |
1311 | return 0; | |
1312 | } else if (rc > 0) { | |
1313 | dump_payload = true; | |
1314 | goto sequence_cmd; | |
1315 | } | |
1316 | ||
1317 | if (!imm_data) | |
1318 | return 0; | |
1319 | ||
9fd60088 JD |
1320 | if (imm_data_len != data_len) { |
1321 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1322 | sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents, | |
1323 | &rx_desc->data[0], imm_data_len); | |
1324 | isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n", | |
1325 | sg_nents, imm_data_len); | |
1326 | } else { | |
1327 | sg_init_table(&isert_cmd->sg, 1); | |
1328 | cmd->se_cmd.t_data_sg = &isert_cmd->sg; | |
1329 | cmd->se_cmd.t_data_nents = 1; | |
1330 | sg_set_buf(&isert_cmd->sg, &rx_desc->data[0], imm_data_len); | |
1331 | isert_dbg("Transfer Immediate imm_data_len: %d\n", | |
1332 | imm_data_len); | |
1333 | } | |
b8d26b3b NB |
1334 | |
1335 | cmd->write_data_done += imm_data_len; | |
1336 | ||
1337 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1338 | spin_lock_bh(&cmd->istate_lock); | |
1339 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1340 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1341 | spin_unlock_bh(&cmd->istate_lock); | |
1342 | } | |
1343 | ||
1344 | sequence_cmd: | |
561bf158 | 1345 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b NB |
1346 | |
1347 | if (!rc && dump_payload == false && unsol_data) | |
1348 | iscsit_set_unsoliticed_dataout(cmd); | |
6cc44a6f | 1349 | else if (dump_payload && imm_data) |
afc16604 | 1350 | target_put_sess_cmd(&cmd->se_cmd); |
b8d26b3b | 1351 | |
b8d26b3b NB |
1352 | return 0; |
1353 | } | |
1354 | ||
1355 | static int | |
1356 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1357 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1358 | { | |
1359 | struct scatterlist *sg_start; | |
1360 | struct iscsi_conn *conn = isert_conn->conn; | |
1361 | struct iscsi_cmd *cmd = NULL; | |
1362 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1363 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1364 | int rc, sg_nents, sg_off, page_off; | |
1365 | ||
1366 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1367 | if (rc < 0) | |
1368 | return rc; | |
1369 | else if (!cmd) | |
1370 | return 0; | |
1371 | /* | |
1372 | * FIXME: Unexpected unsolicited_data out | |
1373 | */ | |
1374 | if (!cmd->unsolicited_data) { | |
24f412dd | 1375 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1376 | dump_stack(); |
1377 | return -1; | |
1378 | } | |
1379 | ||
4c22e07f SG |
1380 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1381 | "write_data_done: %u, data_length: %u\n", | |
1382 | unsol_data_len, cmd->write_data_done, | |
1383 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1384 | |
1385 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1386 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1387 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1388 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1389 | /* | |
1390 | * FIXME: Non page-aligned unsolicited_data out | |
1391 | */ | |
1392 | if (page_off) { | |
4c22e07f | 1393 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1394 | dump_stack(); |
1395 | return -1; | |
1396 | } | |
4c22e07f SG |
1397 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1398 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
1399 | sg_nents, &rx_desc->data[0], unsol_data_len); | |
b8d26b3b NB |
1400 | |
1401 | sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], | |
1402 | unsol_data_len); | |
1403 | ||
1404 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1405 | if (rc < 0) | |
1406 | return rc; | |
1407 | ||
4366b19c JD |
1408 | /* |
1409 | * multiple data-outs on the same command can arrive - | |
1410 | * so post the buffer before hand | |
1411 | */ | |
1412 | rc = isert_post_recv(isert_conn, rx_desc); | |
1413 | if (rc) { | |
1414 | isert_err("ib_post_recv failed with %d\n", rc); | |
1415 | return rc; | |
1416 | } | |
b8d26b3b NB |
1417 | return 0; |
1418 | } | |
1419 | ||
778de368 NB |
1420 | static int |
1421 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1422 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1423 | unsigned char *buf) | |
778de368 | 1424 | { |
778de368 NB |
1425 | struct iscsi_conn *conn = isert_conn->conn; |
1426 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1427 | int rc; | |
1428 | ||
1429 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1430 | if (rc < 0) | |
1431 | return rc; | |
1432 | /* | |
1433 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1434 | */ | |
1435 | ||
1436 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1437 | } | |
1438 | ||
adb54c29 NB |
1439 | static int |
1440 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1441 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1442 | struct iscsi_text *hdr) | |
adb54c29 | 1443 | { |
adb54c29 NB |
1444 | struct iscsi_conn *conn = isert_conn->conn; |
1445 | u32 payload_length = ntoh24(hdr->dlength); | |
1446 | int rc; | |
b44a2b67 | 1447 | unsigned char *text_in = NULL; |
adb54c29 NB |
1448 | |
1449 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1450 | if (rc < 0) | |
1451 | return rc; | |
1452 | ||
b44a2b67 SG |
1453 | if (payload_length) { |
1454 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
1455 | if (!text_in) { | |
1456 | isert_err("Unable to allocate text_in of payload_length: %u\n", | |
1457 | payload_length); | |
1458 | return -ENOMEM; | |
1459 | } | |
adb54c29 NB |
1460 | } |
1461 | cmd->text_in_ptr = text_in; | |
1462 | ||
1463 | memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); | |
1464 | ||
1465 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1466 | } | |
1467 | ||
b8d26b3b NB |
1468 | static int |
1469 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1470 | uint32_t read_stag, uint64_t read_va, | |
1471 | uint32_t write_stag, uint64_t write_va) | |
1472 | { | |
1473 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
1474 | struct iscsi_conn *conn = isert_conn->conn; | |
1475 | struct iscsi_cmd *cmd; | |
1476 | struct isert_cmd *isert_cmd; | |
1477 | int ret = -EINVAL; | |
1478 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1479 | ||
fb140271 | 1480 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1481 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1482 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1483 | " ignoring\n", opcode); |
ca40d24e NB |
1484 | return 0; |
1485 | } | |
1486 | ||
b8d26b3b NB |
1487 | switch (opcode) { |
1488 | case ISCSI_OP_SCSI_CMD: | |
4366b19c | 1489 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1490 | if (!cmd) |
1491 | break; | |
1492 | ||
d703ce2f | 1493 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1494 | isert_cmd->read_stag = read_stag; |
1495 | isert_cmd->read_va = read_va; | |
1496 | isert_cmd->write_stag = write_stag; | |
1497 | isert_cmd->write_va = write_va; | |
422bd0ac | 1498 | isert_cmd->inv_rkey = read_stag ? read_stag : write_stag; |
b8d26b3b | 1499 | |
d703ce2f | 1500 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1501 | rx_desc, (unsigned char *)hdr); |
1502 | break; | |
1503 | case ISCSI_OP_NOOP_OUT: | |
4366b19c | 1504 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1505 | if (!cmd) |
1506 | break; | |
1507 | ||
d703ce2f NB |
1508 | isert_cmd = iscsit_priv_cmd(cmd); |
1509 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1510 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1511 | break; |
1512 | case ISCSI_OP_SCSI_DATA_OUT: | |
1513 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1514 | (unsigned char *)hdr); | |
1515 | break; | |
1516 | case ISCSI_OP_SCSI_TMFUNC: | |
4366b19c | 1517 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1518 | if (!cmd) |
1519 | break; | |
1520 | ||
1521 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1522 | (unsigned char *)hdr); | |
1523 | break; | |
1524 | case ISCSI_OP_LOGOUT: | |
4366b19c | 1525 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1526 | if (!cmd) |
1527 | break; | |
1528 | ||
1529 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1530 | break; |
adb54c29 | 1531 | case ISCSI_OP_TEXT: |
4366b19c | 1532 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) |
e4f4e801 | 1533 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); |
4366b19c JD |
1534 | else |
1535 | cmd = isert_allocate_cmd(conn, rx_desc); | |
1536 | ||
1537 | if (!cmd) | |
1538 | break; | |
adb54c29 | 1539 | |
d703ce2f NB |
1540 | isert_cmd = iscsit_priv_cmd(cmd); |
1541 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1542 | rx_desc, (struct iscsi_text *)hdr); |
1543 | break; | |
b8d26b3b | 1544 | default: |
24f412dd | 1545 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1546 | dump_stack(); |
1547 | break; | |
1548 | } | |
1549 | ||
1550 | return ret; | |
1551 | } | |
1552 | ||
1553 | static void | |
1554 | isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) | |
1555 | { | |
d3cf81f9 | 1556 | struct iser_ctrl *iser_ctrl = &rx_desc->iser_header; |
b8d26b3b NB |
1557 | uint64_t read_va = 0, write_va = 0; |
1558 | uint32_t read_stag = 0, write_stag = 0; | |
b8d26b3b | 1559 | |
d3cf81f9 | 1560 | switch (iser_ctrl->flags & 0xF0) { |
b8d26b3b | 1561 | case ISCSI_CTRL: |
d3cf81f9 SG |
1562 | if (iser_ctrl->flags & ISER_RSV) { |
1563 | read_stag = be32_to_cpu(iser_ctrl->read_stag); | |
1564 | read_va = be64_to_cpu(iser_ctrl->read_va); | |
4c22e07f SG |
1565 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1566 | read_stag, (unsigned long long)read_va); | |
b8d26b3b | 1567 | } |
d3cf81f9 SG |
1568 | if (iser_ctrl->flags & ISER_WSV) { |
1569 | write_stag = be32_to_cpu(iser_ctrl->write_stag); | |
1570 | write_va = be64_to_cpu(iser_ctrl->write_va); | |
4c22e07f SG |
1571 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1572 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1573 | } |
1574 | ||
24f412dd | 1575 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1576 | break; |
1577 | case ISER_HELLO: | |
24f412dd | 1578 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1579 | break; |
1580 | default: | |
d3cf81f9 | 1581 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_ctrl->flags); |
b8d26b3b NB |
1582 | break; |
1583 | } | |
1584 | ||
6c760b3d BVA |
1585 | isert_rx_opcode(isert_conn, rx_desc, |
1586 | read_stag, read_va, write_stag, write_va); | |
b8d26b3b NB |
1587 | } |
1588 | ||
1589 | static void | |
7748681b SG |
1590 | isert_rcv_completion(struct iser_rx_desc *desc, |
1591 | struct isert_conn *isert_conn, | |
1592 | u32 xfer_len) | |
b8d26b3b | 1593 | { |
dac6ab30 | 1594 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1595 | struct iscsi_hdr *hdr; |
1596 | u64 rx_dma; | |
4366b19c | 1597 | int rx_buflen; |
b8d26b3b NB |
1598 | |
1599 | if ((char *)desc == isert_conn->login_req_buf) { | |
1600 | rx_dma = isert_conn->login_req_dma; | |
1601 | rx_buflen = ISER_RX_LOGIN_SIZE; | |
4c22e07f | 1602 | isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1603 | rx_dma, rx_buflen); |
1604 | } else { | |
1605 | rx_dma = desc->dma_addr; | |
1606 | rx_buflen = ISER_RX_PAYLOAD_SIZE; | |
4c22e07f | 1607 | isert_dbg("req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1608 | rx_dma, rx_buflen); |
1609 | } | |
1610 | ||
1611 | ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); | |
1612 | ||
1613 | hdr = &desc->iscsi_header; | |
24f412dd | 1614 | isert_dbg("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", |
b8d26b3b NB |
1615 | hdr->opcode, hdr->itt, hdr->flags, |
1616 | (int)(xfer_len - ISER_HEADERS_LEN)); | |
1617 | ||
2371e5da SG |
1618 | if ((char *)desc == isert_conn->login_req_buf) { |
1619 | isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN; | |
1620 | if (isert_conn->conn) { | |
1621 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
1622 | ||
1623 | if (login && !login->first_request) | |
1624 | isert_rx_login_req(isert_conn); | |
1625 | } | |
dac6ab30 | 1626 | mutex_lock(&isert_conn->mutex); |
2371e5da | 1627 | complete(&isert_conn->login_req_comp); |
dac6ab30 | 1628 | mutex_unlock(&isert_conn->mutex); |
2371e5da | 1629 | } else { |
b8d26b3b | 1630 | isert_rx_do_work(desc, isert_conn); |
2371e5da | 1631 | } |
b8d26b3b NB |
1632 | |
1633 | ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, | |
1634 | DMA_FROM_DEVICE); | |
1635 | ||
1636 | isert_conn->post_recv_buf_count--; | |
b8d26b3b NB |
1637 | } |
1638 | ||
e3d7e4c3 SG |
1639 | static int |
1640 | isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
1641 | struct scatterlist *sg, u32 nents, u32 length, u32 offset, | |
1642 | enum iser_ib_op_code op, struct isert_data_buf *data) | |
1643 | { | |
dac6ab30 | 1644 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1645 | |
1646 | data->dma_dir = op == ISER_IB_RDMA_WRITE ? | |
1647 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
1648 | ||
1649 | data->len = length - offset; | |
1650 | data->offset = offset; | |
1651 | data->sg_off = data->offset / PAGE_SIZE; | |
1652 | ||
1653 | data->sg = &sg[data->sg_off]; | |
1654 | data->nents = min_t(unsigned int, nents - data->sg_off, | |
1655 | ISCSI_ISER_SG_TABLESIZE); | |
1656 | data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * | |
1657 | PAGE_SIZE); | |
1658 | ||
1659 | data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, | |
1660 | data->dma_dir); | |
1661 | if (unlikely(!data->dma_nents)) { | |
24f412dd | 1662 | isert_err("Cmd: unable to dma map SGs %p\n", sg); |
e3d7e4c3 SG |
1663 | return -EINVAL; |
1664 | } | |
1665 | ||
24f412dd | 1666 | isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", |
4c22e07f | 1667 | isert_cmd, data->dma_nents, data->sg, data->nents, data->len); |
e3d7e4c3 SG |
1668 | |
1669 | return 0; | |
1670 | } | |
1671 | ||
1672 | static void | |
1673 | isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) | |
1674 | { | |
dac6ab30 | 1675 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1676 | |
1677 | ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); | |
1678 | memset(data, 0, sizeof(*data)); | |
1679 | } | |
1680 | ||
1681 | ||
1682 | ||
b8d26b3b NB |
1683 | static void |
1684 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) | |
1685 | { | |
1686 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
b8d26b3b | 1687 | |
4c22e07f | 1688 | isert_dbg("Cmd %p\n", isert_cmd); |
e3d7e4c3 SG |
1689 | |
1690 | if (wr->data.sg) { | |
4c22e07f | 1691 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1692 | isert_unmap_data_buf(isert_conn, &wr->data); |
b8d26b3b NB |
1693 | } |
1694 | ||
e622f2f4 | 1695 | if (wr->rdma_wr) { |
4c22e07f | 1696 | isert_dbg("Cmd %p free send_wr\n", isert_cmd); |
e622f2f4 CH |
1697 | kfree(wr->rdma_wr); |
1698 | wr->rdma_wr = NULL; | |
90ecc6e2 | 1699 | } |
b8d26b3b | 1700 | |
90ecc6e2 | 1701 | if (wr->ib_sge) { |
4c22e07f | 1702 | isert_dbg("Cmd %p free ib_sge\n", isert_cmd); |
90ecc6e2 VP |
1703 | kfree(wr->ib_sge); |
1704 | wr->ib_sge = NULL; | |
1705 | } | |
b8d26b3b NB |
1706 | } |
1707 | ||
59464ef4 | 1708 | static void |
a3a5a826 | 1709 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) |
59464ef4 VP |
1710 | { |
1711 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
59464ef4 | 1712 | |
4c22e07f | 1713 | isert_dbg("Cmd %p\n", isert_cmd); |
59464ef4 VP |
1714 | |
1715 | if (wr->fr_desc) { | |
4c22e07f | 1716 | isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd, wr->fr_desc); |
9e961ae7 SG |
1717 | if (wr->fr_desc->ind & ISERT_PROTECTED) { |
1718 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
1719 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
1720 | } | |
dac6ab30 SG |
1721 | spin_lock_bh(&isert_conn->pool_lock); |
1722 | list_add_tail(&wr->fr_desc->list, &isert_conn->fr_pool); | |
1723 | spin_unlock_bh(&isert_conn->pool_lock); | |
59464ef4 VP |
1724 | wr->fr_desc = NULL; |
1725 | } | |
1726 | ||
e3d7e4c3 | 1727 | if (wr->data.sg) { |
4c22e07f | 1728 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1729 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 VP |
1730 | } |
1731 | ||
1732 | wr->ib_sge = NULL; | |
e622f2f4 | 1733 | wr->rdma_wr = NULL; |
59464ef4 VP |
1734 | } |
1735 | ||
b8d26b3b | 1736 | static void |
03e7848a | 1737 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1738 | { |
d703ce2f | 1739 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1740 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1741 | struct iscsi_conn *conn = isert_conn->conn; |
dac6ab30 | 1742 | struct isert_device *device = isert_conn->device; |
e4f4e801 | 1743 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1744 | |
4c22e07f | 1745 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1746 | |
1747 | switch (cmd->iscsi_opcode) { | |
1748 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1749 | spin_lock_bh(&conn->cmd_lock); |
1750 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1751 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1752 | spin_unlock_bh(&conn->cmd_lock); |
1753 | ||
03e7848a | 1754 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1755 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1756 | /* |
1757 | * Check for special case during comp_err where | |
1758 | * WRITE_PENDING has been handed off from core, | |
1759 | * but requires an extra target_put_sess_cmd() | |
1760 | * before transport_generic_free_cmd() below. | |
1761 | */ | |
1762 | if (comp_err && | |
1763 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1764 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1765 | ||
afc16604 | 1766 | target_put_sess_cmd(se_cmd); |
03e7848a NB |
1767 | } |
1768 | } | |
b8d26b3b | 1769 | |
d40945d8 | 1770 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
186a9647 NB |
1771 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1772 | break; | |
b8d26b3b | 1773 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1774 | spin_lock_bh(&conn->cmd_lock); |
1775 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1776 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1777 | spin_unlock_bh(&conn->cmd_lock); |
1778 | ||
b8d26b3b NB |
1779 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1780 | break; | |
1781 | case ISCSI_OP_REJECT: | |
1782 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1783 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1784 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1785 | /* If the continue bit is on, keep the command alive */ | |
1786 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1787 | break; | |
1788 | ||
b8d26b3b NB |
1789 | spin_lock_bh(&conn->cmd_lock); |
1790 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1791 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1792 | spin_unlock_bh(&conn->cmd_lock); |
1793 | ||
1794 | /* | |
1795 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1796 | * overwritten the original iscsi_opcode assignment, and the | |
1797 | * associated cmd->se_cmd needs to be released. | |
1798 | */ | |
1799 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1800 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1801 | cmd->iscsi_opcode); |
b8d26b3b NB |
1802 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1803 | break; | |
1804 | } | |
1805 | /* | |
1806 | * Fall-through | |
1807 | */ | |
1808 | default: | |
d703ce2f | 1809 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1810 | break; |
1811 | } | |
1812 | } | |
1813 | ||
1814 | static void | |
1815 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1816 | { | |
1817 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1818 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1819 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1820 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1821 | tx_desc->dma_addr = 0; | |
1822 | } | |
1823 | } | |
1824 | ||
1825 | static void | |
1826 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1827 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1828 | { |
dbbc5d11 | 1829 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1830 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1831 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1832 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1833 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1834 | } |
1835 | ||
1836 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1837 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1838 | } |
1839 | ||
96b7973e SG |
1840 | static int |
1841 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1842 | { | |
1843 | struct ib_mr_status mr_status; | |
1844 | int ret; | |
1845 | ||
1846 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1847 | if (ret) { | |
24f412dd | 1848 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1849 | goto fail_mr_status; |
1850 | } | |
1851 | ||
1852 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1853 | u64 sec_offset_err; | |
1854 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1855 | ||
1856 | switch (mr_status.sig_err.err_type) { | |
1857 | case IB_SIG_BAD_GUARD: | |
1858 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1859 | break; | |
1860 | case IB_SIG_BAD_REFTAG: | |
1861 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1862 | break; | |
1863 | case IB_SIG_BAD_APPTAG: | |
1864 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1865 | break; | |
1866 | } | |
1867 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1868 | do_div(sec_offset_err, block_size); | |
1869 | se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; | |
1870 | ||
4c22e07f SG |
1871 | isert_err("PI error found type %d at sector 0x%llx " |
1872 | "expected 0x%x vs actual 0x%x\n", | |
1873 | mr_status.sig_err.err_type, | |
1874 | (unsigned long long)se_cmd->bad_sector, | |
1875 | mr_status.sig_err.expected, | |
1876 | mr_status.sig_err.actual); | |
96b7973e SG |
1877 | ret = 1; |
1878 | } | |
1879 | ||
1880 | fail_mr_status: | |
1881 | return ret; | |
1882 | } | |
1883 | ||
f93f3a70 SG |
1884 | static void |
1885 | isert_completion_rdma_write(struct iser_tx_desc *tx_desc, | |
1886 | struct isert_cmd *isert_cmd) | |
1887 | { | |
9e961ae7 | 1888 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
f93f3a70 | 1889 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
9e961ae7 | 1890 | struct se_cmd *se_cmd = &cmd->se_cmd; |
f93f3a70 | 1891 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1892 | struct isert_device *device = isert_conn->device; |
9e961ae7 SG |
1893 | int ret = 0; |
1894 | ||
1895 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { | |
96b7973e SG |
1896 | ret = isert_check_pi_status(se_cmd, |
1897 | wr->fr_desc->pi_ctx->sig_mr); | |
1898 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 | 1899 | } |
f93f3a70 SG |
1900 | |
1901 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
e622f2f4 | 1902 | wr->rdma_wr_num = 0; |
9e961ae7 SG |
1903 | if (ret) |
1904 | transport_send_check_condition_and_sense(se_cmd, | |
1905 | se_cmd->pi_err, 0); | |
1906 | else | |
1907 | isert_put_response(isert_conn->conn, cmd); | |
f93f3a70 SG |
1908 | } |
1909 | ||
b8d26b3b NB |
1910 | static void |
1911 | isert_completion_rdma_read(struct iser_tx_desc *tx_desc, | |
1912 | struct isert_cmd *isert_cmd) | |
1913 | { | |
1914 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
d703ce2f | 1915 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1916 | struct se_cmd *se_cmd = &cmd->se_cmd; |
90ecc6e2 | 1917 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1918 | struct isert_device *device = isert_conn->device; |
5bac4b1a | 1919 | int ret = 0; |
b8d26b3b | 1920 | |
9e961ae7 | 1921 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { |
96b7973e SG |
1922 | ret = isert_check_pi_status(se_cmd, |
1923 | wr->fr_desc->pi_ctx->sig_mr); | |
1924 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 SG |
1925 | } |
1926 | ||
b8d26b3b | 1927 | iscsit_stop_dataout_timer(cmd); |
d40945d8 | 1928 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
e3d7e4c3 | 1929 | cmd->write_data_done = wr->data.len; |
e622f2f4 | 1930 | wr->rdma_wr_num = 0; |
b8d26b3b | 1931 | |
24f412dd | 1932 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1933 | spin_lock_bh(&cmd->istate_lock); |
1934 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1935 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1936 | spin_unlock_bh(&cmd->istate_lock); | |
1937 | ||
364189f0 | 1938 | if (ret) { |
afc16604 | 1939 | target_put_sess_cmd(se_cmd); |
5bac4b1a SG |
1940 | transport_send_check_condition_and_sense(se_cmd, |
1941 | se_cmd->pi_err, 0); | |
364189f0 | 1942 | } else { |
5bac4b1a | 1943 | target_execute_cmd(se_cmd); |
364189f0 | 1944 | } |
b8d26b3b NB |
1945 | } |
1946 | ||
1947 | static void | |
1948 | isert_do_control_comp(struct work_struct *work) | |
1949 | { | |
1950 | struct isert_cmd *isert_cmd = container_of(work, | |
1951 | struct isert_cmd, comp_work); | |
1952 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1953 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
d703ce2f | 1954 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1955 | |
4c22e07f SG |
1956 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1957 | ||
b8d26b3b NB |
1958 | switch (cmd->i_state) { |
1959 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1960 | iscsit_tmr_post_handler(cmd, cmd->conn); |
10633c37 SG |
1961 | case ISTATE_SEND_REJECT: /* FALLTHRU */ |
1962 | case ISTATE_SEND_TEXTRSP: /* FALLTHRU */ | |
b8d26b3b | 1963 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1964 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1965 | ib_dev, false); | |
3df8f68a | 1966 | break; |
b8d26b3b | 1967 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1968 | iscsit_logout_post_handler(cmd, cmd->conn); |
1969 | break; | |
1970 | default: | |
4c22e07f | 1971 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1972 | dump_stack(); |
1973 | break; | |
1974 | } | |
1975 | } | |
1976 | ||
1977 | static void | |
1978 | isert_response_completion(struct iser_tx_desc *tx_desc, | |
1979 | struct isert_cmd *isert_cmd, | |
1980 | struct isert_conn *isert_conn, | |
1981 | struct ib_device *ib_dev) | |
1982 | { | |
d703ce2f | 1983 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b NB |
1984 | |
1985 | if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || | |
3df8f68a | 1986 | cmd->i_state == ISTATE_SEND_LOGOUTRSP || |
adb54c29 NB |
1987 | cmd->i_state == ISTATE_SEND_REJECT || |
1988 | cmd->i_state == ISTATE_SEND_TEXTRSP) { | |
b8d26b3b NB |
1989 | isert_unmap_tx_desc(tx_desc, ib_dev); |
1990 | ||
1991 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1992 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1993 | return; | |
1994 | } | |
897bb2c9 | 1995 | |
b8d26b3b | 1996 | cmd->i_state = ISTATE_SENT_STATUS; |
03e7848a | 1997 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); |
b8d26b3b NB |
1998 | } |
1999 | ||
2000 | static void | |
7748681b | 2001 | isert_snd_completion(struct iser_tx_desc *tx_desc, |
68a86dee | 2002 | struct isert_conn *isert_conn) |
b8d26b3b | 2003 | { |
dac6ab30 | 2004 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
2005 | struct isert_cmd *isert_cmd = tx_desc->isert_cmd; |
2006 | struct isert_rdma_wr *wr; | |
2007 | ||
2008 | if (!isert_cmd) { | |
b8d26b3b NB |
2009 | isert_unmap_tx_desc(tx_desc, ib_dev); |
2010 | return; | |
2011 | } | |
2012 | wr = &isert_cmd->rdma_wr; | |
2013 | ||
4c22e07f SG |
2014 | isert_dbg("Cmd %p iser_ib_op %d\n", isert_cmd, wr->iser_ib_op); |
2015 | ||
b8d26b3b | 2016 | switch (wr->iser_ib_op) { |
b8d26b3b | 2017 | case ISER_IB_SEND: |
b8d26b3b NB |
2018 | isert_response_completion(tx_desc, isert_cmd, |
2019 | isert_conn, ib_dev); | |
2020 | break; | |
2021 | case ISER_IB_RDMA_WRITE: | |
f93f3a70 | 2022 | isert_completion_rdma_write(tx_desc, isert_cmd); |
b8d26b3b NB |
2023 | break; |
2024 | case ISER_IB_RDMA_READ: | |
b8d26b3b NB |
2025 | isert_completion_rdma_read(tx_desc, isert_cmd); |
2026 | break; | |
2027 | default: | |
4c22e07f | 2028 | isert_err("Unknown wr->iser_ib_op: 0x%x\n", wr->iser_ib_op); |
b8d26b3b NB |
2029 | dump_stack(); |
2030 | break; | |
2031 | } | |
2032 | } | |
2033 | ||
6f0fae3d SG |
2034 | /** |
2035 | * is_isert_tx_desc() - Indicate if the completion wr_id | |
2036 | * is a TX descriptor or not. | |
2037 | * @isert_conn: iser connection | |
2038 | * @wr_id: completion WR identifier | |
2039 | * | |
2040 | * Since we cannot rely on wc opcode in FLUSH errors | |
2041 | * we must work around it by checking if the wr_id address | |
2042 | * falls in the iser connection rx_descs buffer. If so | |
2043 | * it is an RX descriptor, otherwize it is a TX. | |
2044 | */ | |
2045 | static inline bool | |
2046 | is_isert_tx_desc(struct isert_conn *isert_conn, void *wr_id) | |
2047 | { | |
dac6ab30 SG |
2048 | void *start = isert_conn->rx_descs; |
2049 | int len = ISERT_QP_MAX_RECV_DTOS * sizeof(*isert_conn->rx_descs); | |
6f0fae3d SG |
2050 | |
2051 | if (wr_id >= start && wr_id < start + len) | |
2052 | return false; | |
2053 | ||
2054 | return true; | |
2055 | } | |
2056 | ||
b8d26b3b | 2057 | static void |
6f0fae3d | 2058 | isert_cq_comp_err(struct isert_conn *isert_conn, struct ib_wc *wc) |
b8d26b3b | 2059 | { |
bdf20e72 | 2060 | if (wc->wr_id == ISER_BEACON_WRID) { |
dac6ab30 | 2061 | isert_info("conn %p completing wait_comp_err\n", |
bdf20e72 | 2062 | isert_conn); |
dac6ab30 | 2063 | complete(&isert_conn->wait_comp_err); |
ed4520ae | 2064 | } else if (is_isert_tx_desc(isert_conn, (void *)(uintptr_t)wc->wr_id)) { |
dac6ab30 | 2065 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
df43debd | 2066 | struct isert_cmd *isert_cmd; |
6f0fae3d | 2067 | struct iser_tx_desc *desc; |
df43debd | 2068 | |
6f0fae3d SG |
2069 | desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
2070 | isert_cmd = desc->isert_cmd; | |
df43debd SG |
2071 | if (!isert_cmd) |
2072 | isert_unmap_tx_desc(desc, ib_dev); | |
2073 | else | |
2074 | isert_completion_put(desc, isert_cmd, ib_dev, true); | |
df43debd SG |
2075 | } else { |
2076 | isert_conn->post_recv_buf_count--; | |
bdf20e72 SG |
2077 | if (!isert_conn->post_recv_buf_count) |
2078 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
df43debd | 2079 | } |
b8d26b3b NB |
2080 | } |
2081 | ||
2082 | static void | |
6f0fae3d | 2083 | isert_handle_wc(struct ib_wc *wc) |
b8d26b3b | 2084 | { |
b8d26b3b NB |
2085 | struct isert_conn *isert_conn; |
2086 | struct iser_tx_desc *tx_desc; | |
6f0fae3d | 2087 | struct iser_rx_desc *rx_desc; |
b8d26b3b | 2088 | |
6f0fae3d SG |
2089 | isert_conn = wc->qp->qp_context; |
2090 | if (likely(wc->status == IB_WC_SUCCESS)) { | |
2091 | if (wc->opcode == IB_WC_RECV) { | |
2092 | rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id; | |
7748681b | 2093 | isert_rcv_completion(rx_desc, isert_conn, wc->byte_len); |
b8d26b3b | 2094 | } else { |
6f0fae3d | 2095 | tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
7748681b | 2096 | isert_snd_completion(tx_desc, isert_conn); |
b8d26b3b | 2097 | } |
6f0fae3d SG |
2098 | } else { |
2099 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
ea8a1616 SG |
2100 | isert_err("%s (%d): wr id %llx vend_err %x\n", |
2101 | ib_wc_status_msg(wc->status), wc->status, | |
2102 | wc->wr_id, wc->vendor_err); | |
6f0fae3d | 2103 | else |
ea8a1616 SG |
2104 | isert_dbg("%s (%d): wr id %llx\n", |
2105 | ib_wc_status_msg(wc->status), wc->status, | |
2106 | wc->wr_id); | |
b8d26b3b | 2107 | |
6f0fae3d SG |
2108 | if (wc->wr_id != ISER_FASTREG_LI_WRID) |
2109 | isert_cq_comp_err(isert_conn, wc); | |
2110 | } | |
b8d26b3b NB |
2111 | } |
2112 | ||
2113 | static void | |
6f0fae3d | 2114 | isert_cq_work(struct work_struct *work) |
b8d26b3b | 2115 | { |
37d9fe80 | 2116 | enum { isert_poll_budget = 65536 }; |
4a295bae | 2117 | struct isert_comp *comp = container_of(work, struct isert_comp, |
6f0fae3d | 2118 | work); |
36ea63b5 SG |
2119 | struct ib_wc *const wcs = comp->wcs; |
2120 | int i, n, completed = 0; | |
b8d26b3b | 2121 | |
36ea63b5 SG |
2122 | while ((n = ib_poll_cq(comp->cq, ARRAY_SIZE(comp->wcs), wcs)) > 0) { |
2123 | for (i = 0; i < n; i++) | |
2124 | isert_handle_wc(&wcs[i]); | |
b8d26b3b | 2125 | |
36ea63b5 SG |
2126 | completed += n; |
2127 | if (completed >= isert_poll_budget) | |
37d9fe80 SG |
2128 | break; |
2129 | } | |
2130 | ||
6f0fae3d | 2131 | ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
b8d26b3b NB |
2132 | } |
2133 | ||
2134 | static void | |
6f0fae3d | 2135 | isert_cq_callback(struct ib_cq *cq, void *context) |
b8d26b3b | 2136 | { |
4a295bae | 2137 | struct isert_comp *comp = context; |
b8d26b3b | 2138 | |
6f0fae3d | 2139 | queue_work(isert_comp_wq, &comp->work); |
b8d26b3b NB |
2140 | } |
2141 | ||
2142 | static int | |
2143 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
2144 | { | |
2145 | struct ib_send_wr *wr_failed; | |
2146 | int ret; | |
2147 | ||
4366b19c JD |
2148 | ret = isert_post_recv(isert_conn, isert_cmd->rx_desc); |
2149 | if (ret) { | |
2150 | isert_err("ib_post_recv failed with %d\n", ret); | |
2151 | return ret; | |
2152 | } | |
2153 | ||
dac6ab30 | 2154 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, |
b8d26b3b NB |
2155 | &wr_failed); |
2156 | if (ret) { | |
24f412dd | 2157 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
2158 | return ret; |
2159 | } | |
2160 | return ret; | |
2161 | } | |
2162 | ||
2163 | static int | |
2164 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2165 | { | |
d703ce2f | 2166 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2167 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2168 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2169 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
2170 | &isert_cmd->tx_desc.iscsi_header; | |
2171 | ||
2172 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2173 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
2174 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2175 | /* | |
2176 | * Attach SENSE DATA payload to iSCSI Response PDU | |
2177 | */ | |
2178 | if (cmd->se_cmd.sense_buffer && | |
2179 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
2180 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 2181 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2182 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 2183 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 2184 | u32 padding, pdu_len; |
b8d26b3b NB |
2185 | |
2186 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
2187 | cmd->sense_buffer); | |
2188 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
2189 | ||
2190 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
2191 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 2192 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 2193 | |
dbbc5d11 NB |
2194 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
2195 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b NB |
2196 | DMA_TO_DEVICE); |
2197 | ||
dbbc5d11 NB |
2198 | isert_cmd->pdu_buf_len = pdu_len; |
2199 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2200 | tx_dsg->length = pdu_len; | |
34efc7df | 2201 | tx_dsg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
2202 | isert_cmd->tx_desc.num_sge = 2; |
2203 | } | |
2204 | ||
68a86dee | 2205 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2206 | |
4c22e07f | 2207 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
2208 | |
2209 | return isert_post_response(isert_conn, isert_cmd); | |
2210 | } | |
2211 | ||
131e6abc NB |
2212 | static void |
2213 | isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2214 | { | |
2215 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 2216 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2217 | struct isert_device *device = isert_conn->device; |
131e6abc NB |
2218 | |
2219 | spin_lock_bh(&conn->cmd_lock); | |
2220 | if (!list_empty(&cmd->i_conn_node)) | |
2221 | list_del_init(&cmd->i_conn_node); | |
2222 | spin_unlock_bh(&conn->cmd_lock); | |
2223 | ||
2224 | if (cmd->data_direction == DMA_TO_DEVICE) | |
2225 | iscsit_stop_dataout_timer(cmd); | |
2226 | ||
2227 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
2228 | } | |
2229 | ||
e70beee7 NB |
2230 | static enum target_prot_op |
2231 | isert_get_sup_prot_ops(struct iscsi_conn *conn) | |
2232 | { | |
6700425e | 2233 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2234 | struct isert_device *device = isert_conn->device; |
e70beee7 | 2235 | |
23a548ee SG |
2236 | if (conn->tpg->tpg_attrib.t10_pi) { |
2237 | if (device->pi_capable) { | |
24f412dd | 2238 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
2239 | isert_conn->pi_support = true; |
2240 | return TARGET_PROT_ALL; | |
2241 | } | |
2242 | } | |
2243 | ||
24f412dd | 2244 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 2245 | isert_conn->pi_support = false; |
e70beee7 NB |
2246 | |
2247 | return TARGET_PROT_NORMAL; | |
2248 | } | |
2249 | ||
b8d26b3b NB |
2250 | static int |
2251 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2252 | bool nopout_response) | |
2253 | { | |
d703ce2f | 2254 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2255 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2256 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2257 | ||
2258 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2259 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
2260 | &isert_cmd->tx_desc.iscsi_header, | |
2261 | nopout_response); | |
2262 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2263 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2264 | |
4c22e07f | 2265 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
2266 | |
2267 | return isert_post_response(isert_conn, isert_cmd); | |
2268 | } | |
2269 | ||
2270 | static int | |
2271 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2272 | { | |
d703ce2f | 2273 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2274 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2275 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2276 | ||
2277 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2278 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
2279 | &isert_cmd->tx_desc.iscsi_header); | |
2280 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2281 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2282 | |
4c22e07f | 2283 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
2284 | |
2285 | return isert_post_response(isert_conn, isert_cmd); | |
2286 | } | |
2287 | ||
2288 | static int | |
2289 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2290 | { | |
d703ce2f | 2291 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2292 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2293 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2294 | ||
2295 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2296 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
2297 | &isert_cmd->tx_desc.iscsi_header); | |
2298 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2299 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2300 | |
4c22e07f | 2301 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
2302 | |
2303 | return isert_post_response(isert_conn, isert_cmd); | |
2304 | } | |
2305 | ||
2306 | static int | |
2307 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2308 | { | |
d703ce2f | 2309 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2310 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 2311 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 2312 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2313 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
2314 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2315 | struct iscsi_reject *hdr = | |
2316 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
2317 | |
2318 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 2319 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 2320 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
2321 | |
2322 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 2323 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
2324 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
2325 | DMA_TO_DEVICE); | |
dbbc5d11 NB |
2326 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
2327 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 2328 | tx_dsg->length = ISCSI_HDR_LEN; |
34efc7df | 2329 | tx_dsg->lkey = device->pd->local_dma_lkey; |
3df8f68a NB |
2330 | isert_cmd->tx_desc.num_sge = 2; |
2331 | ||
68a86dee | 2332 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2333 | |
4c22e07f | 2334 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
2335 | |
2336 | return isert_post_response(isert_conn, isert_cmd); | |
2337 | } | |
2338 | ||
adb54c29 NB |
2339 | static int |
2340 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2341 | { | |
d703ce2f | 2342 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2343 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
2344 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2345 | struct iscsi_text_rsp *hdr = | |
2346 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
2347 | u32 txt_rsp_len; | |
2348 | int rc; | |
2349 | ||
2350 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 2351 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
2352 | if (rc < 0) |
2353 | return rc; | |
2354 | ||
2355 | txt_rsp_len = rc; | |
2356 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2357 | ||
2358 | if (txt_rsp_len) { | |
dac6ab30 | 2359 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2360 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
2361 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2362 | void *txt_rsp_buf = cmd->buf_ptr; | |
2363 | ||
2364 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
2365 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
2366 | ||
2367 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
2368 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2369 | tx_dsg->length = txt_rsp_len; | |
34efc7df | 2370 | tx_dsg->lkey = device->pd->local_dma_lkey; |
adb54c29 NB |
2371 | isert_cmd->tx_desc.num_sge = 2; |
2372 | } | |
68a86dee | 2373 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 2374 | |
f64d2792 | 2375 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
2376 | |
2377 | return isert_post_response(isert_conn, isert_cmd); | |
2378 | } | |
2379 | ||
b8d26b3b NB |
2380 | static int |
2381 | isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
e622f2f4 | 2382 | struct ib_sge *ib_sge, struct ib_rdma_wr *rdma_wr, |
b8d26b3b NB |
2383 | u32 data_left, u32 offset) |
2384 | { | |
d703ce2f | 2385 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 2386 | struct scatterlist *sg_start, *tmp_sg; |
dac6ab30 | 2387 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2388 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
2389 | u32 sg_off, page_off; |
2390 | int i = 0, sg_nents; | |
2391 | ||
2392 | sg_off = offset / PAGE_SIZE; | |
2393 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
2394 | sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); | |
2395 | page_off = offset % PAGE_SIZE; | |
2396 | ||
e622f2f4 CH |
2397 | rdma_wr->wr.sg_list = ib_sge; |
2398 | rdma_wr->wr.wr_id = (uintptr_t)&isert_cmd->tx_desc; | |
b8d26b3b NB |
2399 | /* |
2400 | * Perform mapping of TCM scatterlist memory ib_sge dma_addr. | |
2401 | */ | |
2402 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
4c22e07f SG |
2403 | isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, " |
2404 | "page_off: %u\n", | |
2405 | (unsigned long long)tmp_sg->dma_address, | |
2406 | tmp_sg->length, page_off); | |
b8d26b3b NB |
2407 | |
2408 | ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; | |
2409 | ib_sge->length = min_t(u32, data_left, | |
2410 | ib_sg_dma_len(ib_dev, tmp_sg) - page_off); | |
34efc7df | 2411 | ib_sge->lkey = device->pd->local_dma_lkey; |
b8d26b3b | 2412 | |
4c22e07f SG |
2413 | isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n", |
2414 | ib_sge->addr, ib_sge->length, ib_sge->lkey); | |
b8d26b3b NB |
2415 | page_off = 0; |
2416 | data_left -= ib_sge->length; | |
9253e667 SG |
2417 | if (!data_left) |
2418 | break; | |
b8d26b3b | 2419 | ib_sge++; |
24f412dd | 2420 | isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge); |
b8d26b3b NB |
2421 | } |
2422 | ||
e622f2f4 | 2423 | rdma_wr->wr.num_sge = ++i; |
24f412dd | 2424 | isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", |
e622f2f4 | 2425 | rdma_wr->wr.sg_list, rdma_wr->wr.num_sge); |
b8d26b3b | 2426 | |
e622f2f4 | 2427 | return rdma_wr->wr.num_sge; |
b8d26b3b NB |
2428 | } |
2429 | ||
2430 | static int | |
90ecc6e2 VP |
2431 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2432 | struct isert_rdma_wr *wr) | |
b8d26b3b NB |
2433 | { |
2434 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2435 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2436 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2437 | struct isert_data_buf *data = &wr->data; |
e622f2f4 | 2438 | struct ib_rdma_wr *rdma_wr; |
b8d26b3b | 2439 | struct ib_sge *ib_sge; |
e3d7e4c3 SG |
2440 | u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; |
2441 | int ret = 0, i, ib_sge_cnt; | |
90ecc6e2 | 2442 | |
e3d7e4c3 | 2443 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
b8d26b3b | 2444 | |
e3d7e4c3 SG |
2445 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2446 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2447 | se_cmd->t_data_nents, se_cmd->data_length, | |
2448 | offset, wr->iser_ib_op, &wr->data); | |
2449 | if (ret) | |
2450 | return ret; | |
b8d26b3b | 2451 | |
e3d7e4c3 SG |
2452 | data_left = data->len; |
2453 | offset = data->offset; | |
b8d26b3b | 2454 | |
e3d7e4c3 | 2455 | ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); |
b8d26b3b | 2456 | if (!ib_sge) { |
24f412dd | 2457 | isert_warn("Unable to allocate ib_sge\n"); |
b8d26b3b | 2458 | ret = -ENOMEM; |
e3d7e4c3 | 2459 | goto unmap_cmd; |
b8d26b3b | 2460 | } |
90ecc6e2 | 2461 | wr->ib_sge = ib_sge; |
b8d26b3b | 2462 | |
e622f2f4 CH |
2463 | wr->rdma_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); |
2464 | wr->rdma_wr = kzalloc(sizeof(struct ib_rdma_wr) * wr->rdma_wr_num, | |
b8d26b3b | 2465 | GFP_KERNEL); |
e622f2f4 CH |
2466 | if (!wr->rdma_wr) { |
2467 | isert_dbg("Unable to allocate wr->rdma_wr\n"); | |
b8d26b3b | 2468 | ret = -ENOMEM; |
e3d7e4c3 | 2469 | goto unmap_cmd; |
b8d26b3b | 2470 | } |
b8d26b3b NB |
2471 | |
2472 | wr->isert_cmd = isert_cmd; | |
2473 | rdma_write_max = isert_conn->max_sge * PAGE_SIZE; | |
b8d26b3b | 2474 | |
e622f2f4 CH |
2475 | for (i = 0; i < wr->rdma_wr_num; i++) { |
2476 | rdma_wr = &isert_cmd->rdma_wr.rdma_wr[i]; | |
b8d26b3b NB |
2477 | data_len = min(data_left, rdma_write_max); |
2478 | ||
e622f2f4 | 2479 | rdma_wr->wr.send_flags = 0; |
90ecc6e2 | 2480 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
e622f2f4 CH |
2481 | rdma_wr->wr.opcode = IB_WR_RDMA_WRITE; |
2482 | rdma_wr->remote_addr = isert_cmd->read_va + offset; | |
2483 | rdma_wr->rkey = isert_cmd->read_stag; | |
2484 | if (i + 1 == wr->rdma_wr_num) | |
2485 | rdma_wr->wr.next = &isert_cmd->tx_desc.send_wr; | |
90ecc6e2 | 2486 | else |
e622f2f4 | 2487 | rdma_wr->wr.next = &wr->rdma_wr[i + 1].wr; |
90ecc6e2 | 2488 | } else { |
e622f2f4 CH |
2489 | rdma_wr->wr.opcode = IB_WR_RDMA_READ; |
2490 | rdma_wr->remote_addr = isert_cmd->write_va + va_offset; | |
2491 | rdma_wr->rkey = isert_cmd->write_stag; | |
2492 | if (i + 1 == wr->rdma_wr_num) | |
2493 | rdma_wr->wr.send_flags = IB_SEND_SIGNALED; | |
90ecc6e2 | 2494 | else |
e622f2f4 | 2495 | rdma_wr->wr.next = &wr->rdma_wr[i + 1].wr; |
90ecc6e2 | 2496 | } |
b8d26b3b NB |
2497 | |
2498 | ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, | |
e622f2f4 | 2499 | rdma_wr, data_len, offset); |
b8d26b3b NB |
2500 | ib_sge += ib_sge_cnt; |
2501 | ||
b8d26b3b | 2502 | offset += data_len; |
90ecc6e2 | 2503 | va_offset += data_len; |
b8d26b3b NB |
2504 | data_left -= data_len; |
2505 | } | |
90ecc6e2 VP |
2506 | |
2507 | return 0; | |
e3d7e4c3 SG |
2508 | unmap_cmd: |
2509 | isert_unmap_data_buf(isert_conn, data); | |
2510 | ||
90ecc6e2 VP |
2511 | return ret; |
2512 | } | |
2513 | ||
10633c37 SG |
2514 | static inline void |
2515 | isert_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr) | |
2516 | { | |
2517 | u32 rkey; | |
2518 | ||
2519 | memset(inv_wr, 0, sizeof(*inv_wr)); | |
2520 | inv_wr->wr_id = ISER_FASTREG_LI_WRID; | |
2521 | inv_wr->opcode = IB_WR_LOCAL_INV; | |
2522 | inv_wr->ex.invalidate_rkey = mr->rkey; | |
2523 | ||
2524 | /* Bump the key */ | |
2525 | rkey = ib_inc_rkey(mr->rkey); | |
2526 | ib_update_fast_reg_key(mr, rkey); | |
2527 | } | |
2528 | ||
59464ef4 | 2529 | static int |
e3d7e4c3 SG |
2530 | isert_fast_reg_mr(struct isert_conn *isert_conn, |
2531 | struct fast_reg_descriptor *fr_desc, | |
2532 | struct isert_data_buf *mem, | |
9e961ae7 | 2533 | enum isert_indicator ind, |
e3d7e4c3 | 2534 | struct ib_sge *sge) |
59464ef4 | 2535 | { |
dac6ab30 | 2536 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2537 | struct ib_device *ib_dev = device->ib_device; |
9e961ae7 | 2538 | struct ib_mr *mr; |
16c2d702 | 2539 | struct ib_reg_wr reg_wr; |
e622f2f4 | 2540 | struct ib_send_wr inv_wr, *bad_wr, *wr = NULL; |
16c2d702 | 2541 | int ret, n; |
59464ef4 | 2542 | |
e3d7e4c3 | 2543 | if (mem->dma_nents == 1) { |
34efc7df | 2544 | sge->lkey = device->pd->local_dma_lkey; |
e3d7e4c3 SG |
2545 | sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); |
2546 | sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); | |
4c22e07f SG |
2547 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2548 | sge->addr, sge->length, sge->lkey); | |
e3d7e4c3 SG |
2549 | return 0; |
2550 | } | |
2551 | ||
16c2d702 | 2552 | if (ind == ISERT_DATA_KEY_VALID) |
9e961ae7 SG |
2553 | /* Registering data buffer */ |
2554 | mr = fr_desc->data_mr; | |
16c2d702 | 2555 | else |
9e961ae7 SG |
2556 | /* Registering protection buffer */ |
2557 | mr = fr_desc->pi_ctx->prot_mr; | |
59464ef4 | 2558 | |
10633c37 SG |
2559 | if (!(fr_desc->ind & ind)) { |
2560 | isert_inv_rkey(&inv_wr, mr); | |
59464ef4 | 2561 | wr = &inv_wr; |
59464ef4 VP |
2562 | } |
2563 | ||
16c2d702 SG |
2564 | n = ib_map_mr_sg(mr, mem->sg, mem->nents, PAGE_SIZE); |
2565 | if (unlikely(n != mem->nents)) { | |
2566 | isert_err("failed to map mr sg (%d/%d)\n", | |
2567 | n, mem->nents); | |
2568 | return n < 0 ? n : -EINVAL; | |
2569 | } | |
2570 | ||
2571 | isert_dbg("Use fr_desc %p sg_nents %d offset %u\n", | |
2572 | fr_desc, mem->nents, mem->offset); | |
2573 | ||
2574 | reg_wr.wr.next = NULL; | |
2575 | reg_wr.wr.opcode = IB_WR_REG_MR; | |
2576 | reg_wr.wr.wr_id = ISER_FASTREG_LI_WRID; | |
2577 | reg_wr.wr.send_flags = 0; | |
2578 | reg_wr.wr.num_sge = 0; | |
2579 | reg_wr.mr = mr; | |
2580 | reg_wr.key = mr->lkey; | |
2581 | reg_wr.access = IB_ACCESS_LOCAL_WRITE; | |
59464ef4 VP |
2582 | |
2583 | if (!wr) | |
16c2d702 | 2584 | wr = ®_wr.wr; |
59464ef4 | 2585 | else |
16c2d702 | 2586 | wr->next = ®_wr.wr; |
59464ef4 | 2587 | |
dac6ab30 | 2588 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
59464ef4 | 2589 | if (ret) { |
24f412dd | 2590 | isert_err("fast registration failed, ret:%d\n", ret); |
59464ef4 VP |
2591 | return ret; |
2592 | } | |
9e961ae7 | 2593 | fr_desc->ind &= ~ind; |
59464ef4 | 2594 | |
9e961ae7 | 2595 | sge->lkey = mr->lkey; |
16c2d702 SG |
2596 | sge->addr = mr->iova; |
2597 | sge->length = mr->length; | |
59464ef4 | 2598 | |
4c22e07f SG |
2599 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2600 | sge->addr, sge->length, sge->lkey); | |
9e961ae7 SG |
2601 | |
2602 | return ret; | |
2603 | } | |
2604 | ||
3d73cf1a SG |
2605 | static inline void |
2606 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, | |
2607 | struct ib_sig_domain *domain) | |
2608 | { | |
78eda2bb | 2609 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
2610 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
2611 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
2612 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
2613 | /* |
2614 | * At the moment we hard code those, but if in the future | |
2615 | * the target core would like to use it, we will take it | |
2616 | * from se_cmd. | |
2617 | */ | |
2618 | domain->sig.dif.apptag_check_mask = 0xffff; | |
2619 | domain->sig.dif.app_escape = true; | |
2620 | domain->sig.dif.ref_escape = true; | |
2621 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
2622 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
2623 | domain->sig.dif.ref_remap = true; | |
3d73cf1a SG |
2624 | }; |
2625 | ||
9e961ae7 SG |
2626 | static int |
2627 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2628 | { | |
9e961ae7 SG |
2629 | switch (se_cmd->prot_op) { |
2630 | case TARGET_PROT_DIN_INSERT: | |
2631 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2632 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2633 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
9e961ae7 SG |
2634 | break; |
2635 | case TARGET_PROT_DOUT_INSERT: | |
2636 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2637 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2638 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); |
9e961ae7 SG |
2639 | break; |
2640 | case TARGET_PROT_DIN_PASS: | |
2641 | case TARGET_PROT_DOUT_PASS: | |
3d73cf1a SG |
2642 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
2643 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); | |
9e961ae7 SG |
2644 | break; |
2645 | default: | |
24f412dd | 2646 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2647 | return -EINVAL; |
2648 | } | |
2649 | ||
2650 | return 0; | |
2651 | } | |
2652 | ||
2653 | static inline u8 | |
2654 | isert_set_prot_checks(u8 prot_checks) | |
2655 | { | |
2656 | return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | | |
2657 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | | |
2658 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); | |
2659 | } | |
2660 | ||
2661 | static int | |
570db170 SG |
2662 | isert_reg_sig_mr(struct isert_conn *isert_conn, |
2663 | struct se_cmd *se_cmd, | |
2664 | struct isert_rdma_wr *rdma_wr, | |
2665 | struct fast_reg_descriptor *fr_desc) | |
9e961ae7 | 2666 | { |
e622f2f4 CH |
2667 | struct ib_sig_handover_wr sig_wr; |
2668 | struct ib_send_wr inv_wr, *bad_wr, *wr = NULL; | |
9e961ae7 SG |
2669 | struct pi_context *pi_ctx = fr_desc->pi_ctx; |
2670 | struct ib_sig_attrs sig_attrs; | |
2671 | int ret; | |
9e961ae7 SG |
2672 | |
2673 | memset(&sig_attrs, 0, sizeof(sig_attrs)); | |
2674 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); | |
2675 | if (ret) | |
2676 | goto err; | |
59464ef4 | 2677 | |
9e961ae7 SG |
2678 | sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); |
2679 | ||
2680 | if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { | |
10633c37 | 2681 | isert_inv_rkey(&inv_wr, pi_ctx->sig_mr); |
9e961ae7 | 2682 | wr = &inv_wr; |
9e961ae7 SG |
2683 | } |
2684 | ||
2685 | memset(&sig_wr, 0, sizeof(sig_wr)); | |
e622f2f4 CH |
2686 | sig_wr.wr.opcode = IB_WR_REG_SIG_MR; |
2687 | sig_wr.wr.wr_id = ISER_FASTREG_LI_WRID; | |
2688 | sig_wr.wr.sg_list = &rdma_wr->ib_sg[DATA]; | |
2689 | sig_wr.wr.num_sge = 1; | |
2690 | sig_wr.access_flags = IB_ACCESS_LOCAL_WRITE; | |
2691 | sig_wr.sig_attrs = &sig_attrs; | |
2692 | sig_wr.sig_mr = pi_ctx->sig_mr; | |
9e961ae7 | 2693 | if (se_cmd->t_prot_sg) |
e622f2f4 | 2694 | sig_wr.prot = &rdma_wr->ib_sg[PROT]; |
9e961ae7 SG |
2695 | |
2696 | if (!wr) | |
e622f2f4 | 2697 | wr = &sig_wr.wr; |
9e961ae7 | 2698 | else |
e622f2f4 | 2699 | wr->next = &sig_wr.wr; |
9e961ae7 | 2700 | |
dac6ab30 | 2701 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
9e961ae7 | 2702 | if (ret) { |
24f412dd | 2703 | isert_err("fast registration failed, ret:%d\n", ret); |
9e961ae7 SG |
2704 | goto err; |
2705 | } | |
2706 | fr_desc->ind &= ~ISERT_SIG_KEY_VALID; | |
2707 | ||
570db170 SG |
2708 | rdma_wr->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey; |
2709 | rdma_wr->ib_sg[SIG].addr = 0; | |
2710 | rdma_wr->ib_sg[SIG].length = se_cmd->data_length; | |
9e961ae7 SG |
2711 | if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && |
2712 | se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) | |
2713 | /* | |
2714 | * We have protection guards on the wire | |
2715 | * so we need to set a larget transfer | |
2716 | */ | |
570db170 | 2717 | rdma_wr->ib_sg[SIG].length += se_cmd->prot_length; |
9e961ae7 | 2718 | |
24f412dd | 2719 | isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n", |
570db170 SG |
2720 | rdma_wr->ib_sg[SIG].addr, rdma_wr->ib_sg[SIG].length, |
2721 | rdma_wr->ib_sg[SIG].lkey); | |
9e961ae7 | 2722 | err: |
59464ef4 VP |
2723 | return ret; |
2724 | } | |
2725 | ||
570db170 SG |
2726 | static int |
2727 | isert_handle_prot_cmd(struct isert_conn *isert_conn, | |
2728 | struct isert_cmd *isert_cmd, | |
2729 | struct isert_rdma_wr *wr) | |
2730 | { | |
dac6ab30 | 2731 | struct isert_device *device = isert_conn->device; |
570db170 SG |
2732 | struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd; |
2733 | int ret; | |
2734 | ||
2735 | if (!wr->fr_desc->pi_ctx) { | |
2736 | ret = isert_create_pi_ctx(wr->fr_desc, | |
2737 | device->ib_device, | |
67cb3949 | 2738 | device->pd); |
570db170 | 2739 | if (ret) { |
24f412dd | 2740 | isert_err("conn %p failed to allocate pi_ctx\n", |
570db170 SG |
2741 | isert_conn); |
2742 | return ret; | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | if (se_cmd->t_prot_sg) { | |
2747 | ret = isert_map_data_buf(isert_conn, isert_cmd, | |
2748 | se_cmd->t_prot_sg, | |
2749 | se_cmd->t_prot_nents, | |
2750 | se_cmd->prot_length, | |
2751 | 0, wr->iser_ib_op, &wr->prot); | |
2752 | if (ret) { | |
24f412dd | 2753 | isert_err("conn %p failed to map protection buffer\n", |
570db170 SG |
2754 | isert_conn); |
2755 | return ret; | |
2756 | } | |
2757 | ||
2758 | memset(&wr->ib_sg[PROT], 0, sizeof(wr->ib_sg[PROT])); | |
2759 | ret = isert_fast_reg_mr(isert_conn, wr->fr_desc, &wr->prot, | |
2760 | ISERT_PROT_KEY_VALID, &wr->ib_sg[PROT]); | |
2761 | if (ret) { | |
24f412dd | 2762 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2763 | isert_conn); |
2764 | goto unmap_prot_cmd; | |
2765 | } | |
2766 | } | |
2767 | ||
2768 | ret = isert_reg_sig_mr(isert_conn, se_cmd, wr, wr->fr_desc); | |
2769 | if (ret) { | |
24f412dd | 2770 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2771 | isert_conn); |
2772 | goto unmap_prot_cmd; | |
2773 | } | |
2774 | wr->fr_desc->ind |= ISERT_PROTECTED; | |
2775 | ||
2776 | return 0; | |
2777 | ||
2778 | unmap_prot_cmd: | |
2779 | if (se_cmd->t_prot_sg) | |
2780 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
2781 | ||
2782 | return ret; | |
2783 | } | |
2784 | ||
59464ef4 | 2785 | static int |
a3a5a826 SG |
2786 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2787 | struct isert_rdma_wr *wr) | |
59464ef4 VP |
2788 | { |
2789 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
2790 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
e3d7e4c3 | 2791 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2792 | struct fast_reg_descriptor *fr_desc = NULL; |
e622f2f4 | 2793 | struct ib_rdma_wr *rdma_wr; |
570db170 | 2794 | struct ib_sge *ib_sg; |
e3d7e4c3 SG |
2795 | u32 offset; |
2796 | int ret = 0; | |
59464ef4 VP |
2797 | unsigned long flags; |
2798 | ||
e3d7e4c3 | 2799 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
59464ef4 | 2800 | |
e3d7e4c3 SG |
2801 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2802 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2803 | se_cmd->t_data_nents, se_cmd->data_length, | |
2804 | offset, wr->iser_ib_op, &wr->data); | |
2805 | if (ret) | |
2806 | return ret; | |
59464ef4 | 2807 | |
302cc7c3 | 2808 | if (wr->data.dma_nents != 1 || isert_prot_cmd(isert_conn, se_cmd)) { |
dac6ab30 SG |
2809 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2810 | fr_desc = list_first_entry(&isert_conn->fr_pool, | |
e3d7e4c3 SG |
2811 | struct fast_reg_descriptor, list); |
2812 | list_del(&fr_desc->list); | |
dac6ab30 | 2813 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); |
e3d7e4c3 | 2814 | wr->fr_desc = fr_desc; |
59464ef4 | 2815 | } |
59464ef4 | 2816 | |
9e961ae7 | 2817 | ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, |
570db170 | 2818 | ISERT_DATA_KEY_VALID, &wr->ib_sg[DATA]); |
e3d7e4c3 SG |
2819 | if (ret) |
2820 | goto unmap_cmd; | |
59464ef4 | 2821 | |
302cc7c3 | 2822 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
570db170 | 2823 | ret = isert_handle_prot_cmd(isert_conn, isert_cmd, wr); |
9e961ae7 | 2824 | if (ret) |
570db170 | 2825 | goto unmap_cmd; |
9e961ae7 | 2826 | |
570db170 SG |
2827 | ib_sg = &wr->ib_sg[SIG]; |
2828 | } else { | |
2829 | ib_sg = &wr->ib_sg[DATA]; | |
2830 | } | |
9e961ae7 | 2831 | |
570db170 | 2832 | memcpy(&wr->s_ib_sge, ib_sg, sizeof(*ib_sg)); |
e3d7e4c3 | 2833 | wr->ib_sge = &wr->s_ib_sge; |
e622f2f4 CH |
2834 | wr->rdma_wr_num = 1; |
2835 | memset(&wr->s_rdma_wr, 0, sizeof(wr->s_rdma_wr)); | |
2836 | wr->rdma_wr = &wr->s_rdma_wr; | |
59464ef4 | 2837 | wr->isert_cmd = isert_cmd; |
59464ef4 | 2838 | |
e622f2f4 CH |
2839 | rdma_wr = &isert_cmd->rdma_wr.s_rdma_wr; |
2840 | rdma_wr->wr.sg_list = &wr->s_ib_sge; | |
2841 | rdma_wr->wr.num_sge = 1; | |
2842 | rdma_wr->wr.wr_id = (uintptr_t)&isert_cmd->tx_desc; | |
59464ef4 | 2843 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
e622f2f4 CH |
2844 | rdma_wr->wr.opcode = IB_WR_RDMA_WRITE; |
2845 | rdma_wr->remote_addr = isert_cmd->read_va; | |
2846 | rdma_wr->rkey = isert_cmd->read_stag; | |
2847 | rdma_wr->wr.send_flags = !isert_prot_cmd(isert_conn, se_cmd) ? | |
9e961ae7 | 2848 | 0 : IB_SEND_SIGNALED; |
59464ef4 | 2849 | } else { |
e622f2f4 CH |
2850 | rdma_wr->wr.opcode = IB_WR_RDMA_READ; |
2851 | rdma_wr->remote_addr = isert_cmd->write_va; | |
2852 | rdma_wr->rkey = isert_cmd->write_stag; | |
2853 | rdma_wr->wr.send_flags = IB_SEND_SIGNALED; | |
59464ef4 VP |
2854 | } |
2855 | ||
e3d7e4c3 | 2856 | return 0; |
570db170 | 2857 | |
e3d7e4c3 SG |
2858 | unmap_cmd: |
2859 | if (fr_desc) { | |
dac6ab30 SG |
2860 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2861 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); | |
2862 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); | |
59464ef4 | 2863 | } |
e3d7e4c3 | 2864 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 | 2865 | |
59464ef4 VP |
2866 | return ret; |
2867 | } | |
2868 | ||
90ecc6e2 VP |
2869 | static int |
2870 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2871 | { | |
2872 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2873 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
90ecc6e2 | 2874 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2875 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2876 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2877 | struct ib_send_wr *wr_failed; |
2878 | int rc; | |
2879 | ||
24f412dd | 2880 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2881 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2882 | |
90ecc6e2 | 2883 | wr->iser_ib_op = ISER_IB_RDMA_WRITE; |
d40945d8 | 2884 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2885 | if (rc) { |
24f412dd | 2886 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 VP |
2887 | return rc; |
2888 | } | |
2889 | ||
302cc7c3 | 2890 | if (!isert_prot_cmd(isert_conn, se_cmd)) { |
9e961ae7 SG |
2891 | /* |
2892 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2893 | */ | |
2894 | isert_create_send_desc(isert_conn, isert_cmd, | |
2895 | &isert_cmd->tx_desc); | |
2896 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2897 | &isert_cmd->tx_desc.iscsi_header); | |
2898 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2899 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2900 | &isert_cmd->tx_desc.send_wr); |
e622f2f4 CH |
2901 | isert_cmd->rdma_wr.s_rdma_wr.wr.next = &isert_cmd->tx_desc.send_wr; |
2902 | wr->rdma_wr_num += 1; | |
4366b19c JD |
2903 | |
2904 | rc = isert_post_recv(isert_conn, isert_cmd->rx_desc); | |
2905 | if (rc) { | |
2906 | isert_err("ib_post_recv failed with %d\n", rc); | |
2907 | return rc; | |
2908 | } | |
9e961ae7 | 2909 | } |
b8d26b3b | 2910 | |
e622f2f4 | 2911 | rc = ib_post_send(isert_conn->qp, &wr->rdma_wr->wr, &wr_failed); |
bdf20e72 | 2912 | if (rc) |
24f412dd | 2913 | isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); |
9e961ae7 | 2914 | |
302cc7c3 | 2915 | if (!isert_prot_cmd(isert_conn, se_cmd)) |
24f412dd | 2916 | isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data " |
9e961ae7 SG |
2917 | "READ\n", isert_cmd); |
2918 | else | |
24f412dd | 2919 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", |
9e961ae7 | 2920 | isert_cmd); |
b8d26b3b | 2921 | |
90ecc6e2 | 2922 | return 1; |
b8d26b3b NB |
2923 | } |
2924 | ||
2925 | static int | |
2926 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2927 | { | |
2928 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2929 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 2930 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2931 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2932 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2933 | struct ib_send_wr *wr_failed; |
2934 | int rc; | |
b8d26b3b | 2935 | |
24f412dd | 2936 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
90ecc6e2 | 2937 | isert_cmd, se_cmd->data_length, cmd->write_data_done); |
b8d26b3b | 2938 | wr->iser_ib_op = ISER_IB_RDMA_READ; |
d40945d8 | 2939 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2940 | if (rc) { |
24f412dd | 2941 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 | 2942 | return rc; |
b8d26b3b NB |
2943 | } |
2944 | ||
e622f2f4 | 2945 | rc = ib_post_send(isert_conn->qp, &wr->rdma_wr->wr, &wr_failed); |
bdf20e72 | 2946 | if (rc) |
24f412dd | 2947 | isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); |
bdf20e72 | 2948 | |
24f412dd | 2949 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", |
90ecc6e2 | 2950 | isert_cmd); |
b8d26b3b | 2951 | |
90ecc6e2 | 2952 | return 0; |
b8d26b3b NB |
2953 | } |
2954 | ||
2955 | static int | |
2956 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2957 | { | |
a4c15cd9 JD |
2958 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
2959 | int ret = 0; | |
b8d26b3b NB |
2960 | |
2961 | switch (state) { | |
a4c15cd9 JD |
2962 | case ISTATE_REMOVE: |
2963 | spin_lock_bh(&conn->cmd_lock); | |
2964 | list_del_init(&cmd->i_conn_node); | |
2965 | spin_unlock_bh(&conn->cmd_lock); | |
2966 | isert_put_cmd(isert_cmd, true); | |
2967 | break; | |
b8d26b3b NB |
2968 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: |
2969 | ret = isert_put_nopin(cmd, conn, false); | |
2970 | break; | |
2971 | default: | |
24f412dd | 2972 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
2973 | ret = -EINVAL; |
2974 | break; | |
2975 | } | |
2976 | ||
2977 | return ret; | |
2978 | } | |
2979 | ||
2980 | static int | |
2981 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2982 | { | |
991bb764 | 2983 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2984 | int ret; |
2985 | ||
2986 | switch (state) { | |
2987 | case ISTATE_SEND_LOGOUTRSP: | |
2988 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
2989 | if (!ret) |
2990 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
2991 | break; |
2992 | case ISTATE_SEND_NOPIN: | |
2993 | ret = isert_put_nopin(cmd, conn, true); | |
2994 | break; | |
2995 | case ISTATE_SEND_TASKMGTRSP: | |
2996 | ret = isert_put_tm_rsp(cmd, conn); | |
2997 | break; | |
2998 | case ISTATE_SEND_REJECT: | |
2999 | ret = isert_put_reject(cmd, conn); | |
3000 | break; | |
adb54c29 NB |
3001 | case ISTATE_SEND_TEXTRSP: |
3002 | ret = isert_put_text_rsp(cmd, conn); | |
3003 | break; | |
b8d26b3b NB |
3004 | case ISTATE_SEND_STATUS: |
3005 | /* | |
3006 | * Special case for sending non GOOD SCSI status from TX thread | |
3007 | * context during pre se_cmd excecution failure. | |
3008 | */ | |
3009 | ret = isert_put_response(conn, cmd); | |
3010 | break; | |
3011 | default: | |
24f412dd | 3012 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
3013 | ret = -EINVAL; |
3014 | break; | |
3015 | } | |
3016 | ||
3017 | return ret; | |
3018 | } | |
3019 | ||
ca6c1d82 SG |
3020 | struct rdma_cm_id * |
3021 | isert_setup_id(struct isert_np *isert_np) | |
3022 | { | |
3023 | struct iscsi_np *np = isert_np->np; | |
3024 | struct rdma_cm_id *id; | |
3025 | struct sockaddr *sa; | |
3026 | int ret; | |
3027 | ||
3028 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 3029 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 | 3030 | |
fa20105e | 3031 | id = rdma_create_id(&init_net, isert_cma_handler, isert_np, |
ca6c1d82 SG |
3032 | RDMA_PS_TCP, IB_QPT_RC); |
3033 | if (IS_ERR(id)) { | |
24f412dd | 3034 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
3035 | ret = PTR_ERR(id); |
3036 | goto out; | |
3037 | } | |
24f412dd | 3038 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 SG |
3039 | |
3040 | ret = rdma_bind_addr(id, sa); | |
3041 | if (ret) { | |
24f412dd | 3042 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
3043 | goto out_id; |
3044 | } | |
3045 | ||
992607e8 | 3046 | ret = rdma_listen(id, 0); |
ca6c1d82 | 3047 | if (ret) { |
24f412dd | 3048 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
3049 | goto out_id; |
3050 | } | |
3051 | ||
3052 | return id; | |
3053 | out_id: | |
3054 | rdma_destroy_id(id); | |
3055 | out: | |
3056 | return ERR_PTR(ret); | |
3057 | } | |
3058 | ||
b8d26b3b NB |
3059 | static int |
3060 | isert_setup_np(struct iscsi_np *np, | |
13a3cf08 | 3061 | struct sockaddr_storage *ksockaddr) |
b8d26b3b NB |
3062 | { |
3063 | struct isert_np *isert_np; | |
3064 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
3065 | int ret; |
3066 | ||
3067 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
3068 | if (!isert_np) { | |
24f412dd | 3069 | isert_err("Unable to allocate struct isert_np\n"); |
b8d26b3b NB |
3070 | return -ENOMEM; |
3071 | } | |
ed8cb0a4 JD |
3072 | sema_init(&isert_np->sem, 0); |
3073 | mutex_init(&isert_np->mutex); | |
bd379220 JD |
3074 | INIT_LIST_HEAD(&isert_np->accepted); |
3075 | INIT_LIST_HEAD(&isert_np->pending); | |
ca6c1d82 | 3076 | isert_np->np = np; |
b8d26b3b | 3077 | |
b8d26b3b NB |
3078 | /* |
3079 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
3080 | * in iscsi_target_configfs.c code.. | |
3081 | */ | |
3082 | memcpy(&np->np_sockaddr, ksockaddr, | |
13a3cf08 | 3083 | sizeof(struct sockaddr_storage)); |
b8d26b3b | 3084 | |
ca6c1d82 | 3085 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 3086 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
3087 | ret = PTR_ERR(isert_lid); |
3088 | goto out; | |
3089 | } | |
3090 | ||
ed8cb0a4 | 3091 | isert_np->cm_id = isert_lid; |
b8d26b3b | 3092 | np->np_context = isert_np; |
b8d26b3b NB |
3093 | |
3094 | return 0; | |
3095 | ||
b8d26b3b NB |
3096 | out: |
3097 | kfree(isert_np); | |
ca6c1d82 | 3098 | |
b8d26b3b NB |
3099 | return ret; |
3100 | } | |
3101 | ||
b8d26b3b NB |
3102 | static int |
3103 | isert_rdma_accept(struct isert_conn *isert_conn) | |
3104 | { | |
dac6ab30 | 3105 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
3106 | struct rdma_conn_param cp; |
3107 | int ret; | |
13bce482 | 3108 | struct iser_cm_hdr rsp_hdr; |
b8d26b3b NB |
3109 | |
3110 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
3111 | cp.initiator_depth = isert_conn->initiator_depth; |
3112 | cp.retry_count = 7; | |
3113 | cp.rnr_retry_count = 7; | |
3114 | ||
13bce482 | 3115 | memset(&rsp_hdr, 0, sizeof(rsp_hdr)); |
422bd0ac JD |
3116 | rsp_hdr.flags = ISERT_ZBVA_NOT_USED; |
3117 | if (!isert_conn->snd_w_inv) | |
3118 | rsp_hdr.flags = rsp_hdr.flags | ISERT_SEND_W_INV_NOT_USED; | |
13bce482 JD |
3119 | cp.private_data = (void *)&rsp_hdr; |
3120 | cp.private_data_len = sizeof(rsp_hdr); | |
3121 | ||
b8d26b3b NB |
3122 | ret = rdma_accept(cm_id, &cp); |
3123 | if (ret) { | |
24f412dd | 3124 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
3125 | return ret; |
3126 | } | |
3127 | ||
b8d26b3b NB |
3128 | return 0; |
3129 | } | |
3130 | ||
3131 | static int | |
3132 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
3133 | { | |
6700425e | 3134 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
3135 | int ret; |
3136 | ||
24f412dd | 3137 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
3138 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
3139 | if (ret) { | |
24f412dd | 3140 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
3141 | isert_conn); |
3142 | return ret; | |
3143 | } | |
3144 | reinit_completion(&isert_conn->login_req_comp); | |
3145 | ||
6faaa85f NB |
3146 | /* |
3147 | * For login requests after the first PDU, isert_rx_login_req() will | |
3148 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
3149 | * received, which turns this callback from iscsi_target_do_login_rx() | |
3150 | * into a NOP. | |
3151 | */ | |
3152 | if (!login->first_request) | |
3153 | return 0; | |
b8d26b3b | 3154 | |
2371e5da SG |
3155 | isert_rx_login_req(isert_conn); |
3156 | ||
dac6ab30 SG |
3157 | isert_info("before login_comp conn: %p\n", conn); |
3158 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
3159 | if (ret) |
3160 | return ret; | |
3161 | ||
24f412dd | 3162 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 3163 | |
b8d26b3b NB |
3164 | return 0; |
3165 | } | |
3166 | ||
3167 | static void | |
3168 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
3169 | struct isert_conn *isert_conn) | |
3170 | { | |
dac6ab30 | 3171 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b | 3172 | struct rdma_route *cm_route = &cm_id->route; |
b8d26b3b NB |
3173 | |
3174 | conn->login_family = np->np_sockaddr.ss_family; | |
3175 | ||
dc58f760 AG |
3176 | conn->login_sockaddr = cm_route->addr.dst_addr; |
3177 | conn->local_sockaddr = cm_route->addr.src_addr; | |
b8d26b3b NB |
3178 | } |
3179 | ||
3180 | static int | |
3181 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
3182 | { | |
6700425e | 3183 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 3184 | struct isert_conn *isert_conn; |
c6b8e918 | 3185 | int ret; |
b8d26b3b NB |
3186 | |
3187 | accept_wait: | |
ed8cb0a4 | 3188 | ret = down_interruptible(&isert_np->sem); |
c6b8e918 | 3189 | if (ret) |
b8d26b3b NB |
3190 | return -ENODEV; |
3191 | ||
3192 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 3193 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 3194 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 3195 | isert_dbg("np_thread_state %d\n", |
e346ab34 SG |
3196 | np->np_thread_state); |
3197 | /** | |
3198 | * No point in stalling here when np_thread | |
3199 | * is in state RESET/SHUTDOWN/EXIT - bail | |
3200 | **/ | |
b8d26b3b NB |
3201 | return -ENODEV; |
3202 | } | |
3203 | spin_unlock_bh(&np->np_thread_lock); | |
3204 | ||
ed8cb0a4 | 3205 | mutex_lock(&isert_np->mutex); |
bd379220 | 3206 | if (list_empty(&isert_np->pending)) { |
ed8cb0a4 | 3207 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
3208 | goto accept_wait; |
3209 | } | |
bd379220 JD |
3210 | isert_conn = list_first_entry(&isert_np->pending, |
3211 | struct isert_conn, node); | |
3212 | list_del_init(&isert_conn->node); | |
ed8cb0a4 | 3213 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
3214 | |
3215 | conn->context = isert_conn; | |
3216 | isert_conn->conn = conn; | |
b8d26b3b | 3217 | |
b8d26b3b NB |
3218 | isert_set_conn_info(np, conn, isert_conn); |
3219 | ||
24f412dd | 3220 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 3221 | |
b8d26b3b NB |
3222 | return 0; |
3223 | } | |
3224 | ||
3225 | static void | |
3226 | isert_free_np(struct iscsi_np *np) | |
3227 | { | |
6700425e | 3228 | struct isert_np *isert_np = np->np_context; |
268e6811 | 3229 | struct isert_conn *isert_conn, *n; |
b8d26b3b | 3230 | |
ed8cb0a4 JD |
3231 | if (isert_np->cm_id) |
3232 | rdma_destroy_id(isert_np->cm_id); | |
b8d26b3b | 3233 | |
268e6811 SG |
3234 | /* |
3235 | * FIXME: At this point we don't have a good way to insure | |
3236 | * that at this point we don't have hanging connections that | |
3237 | * completed RDMA establishment but didn't start iscsi login | |
3238 | * process. So work-around this by cleaning up what ever piled | |
bd379220 | 3239 | * up in accepted and pending lists. |
268e6811 | 3240 | */ |
ed8cb0a4 | 3241 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
3242 | if (!list_empty(&isert_np->pending)) { |
3243 | isert_info("Still have isert pending connections\n"); | |
3244 | list_for_each_entry_safe(isert_conn, n, | |
3245 | &isert_np->pending, | |
3246 | node) { | |
3247 | isert_info("cleaning isert_conn %p state (%d)\n", | |
3248 | isert_conn, isert_conn->state); | |
3249 | isert_connect_release(isert_conn); | |
3250 | } | |
3251 | } | |
3252 | ||
3253 | if (!list_empty(&isert_np->accepted)) { | |
3254 | isert_info("Still have isert accepted connections\n"); | |
268e6811 | 3255 | list_for_each_entry_safe(isert_conn, n, |
bd379220 JD |
3256 | &isert_np->accepted, |
3257 | node) { | |
24f412dd | 3258 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 SG |
3259 | isert_conn, isert_conn->state); |
3260 | isert_connect_release(isert_conn); | |
3261 | } | |
3262 | } | |
ed8cb0a4 | 3263 | mutex_unlock(&isert_np->mutex); |
268e6811 | 3264 | |
b8d26b3b NB |
3265 | np->np_context = NULL; |
3266 | kfree(isert_np); | |
3267 | } | |
3268 | ||
b02efbfc SG |
3269 | static void isert_release_work(struct work_struct *work) |
3270 | { | |
3271 | struct isert_conn *isert_conn = container_of(work, | |
3272 | struct isert_conn, | |
3273 | release_work); | |
3274 | ||
24f412dd | 3275 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 3276 | |
dac6ab30 | 3277 | wait_for_completion(&isert_conn->wait); |
b02efbfc | 3278 | |
dac6ab30 | 3279 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 3280 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 3281 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 3282 | |
24f412dd | 3283 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
3284 | isert_put_conn(isert_conn); |
3285 | } | |
3286 | ||
991bb764 SG |
3287 | static void |
3288 | isert_wait4logout(struct isert_conn *isert_conn) | |
3289 | { | |
3290 | struct iscsi_conn *conn = isert_conn->conn; | |
3291 | ||
4c22e07f SG |
3292 | isert_info("conn %p\n", isert_conn); |
3293 | ||
991bb764 | 3294 | if (isert_conn->logout_posted) { |
24f412dd | 3295 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
3296 | wait_for_completion_timeout(&conn->conn_logout_comp, |
3297 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3298 | } | |
3299 | } | |
3300 | ||
c7e160ee SG |
3301 | static void |
3302 | isert_wait4cmds(struct iscsi_conn *conn) | |
3303 | { | |
4c22e07f SG |
3304 | isert_info("iscsi_conn %p\n", conn); |
3305 | ||
c7e160ee SG |
3306 | if (conn->sess) { |
3307 | target_sess_cmd_list_set_waiting(conn->sess->se_sess); | |
3308 | target_wait_for_sess_cmds(conn->sess->se_sess); | |
3309 | } | |
3310 | } | |
3311 | ||
bdf20e72 SG |
3312 | static void |
3313 | isert_wait4flush(struct isert_conn *isert_conn) | |
3314 | { | |
3315 | struct ib_recv_wr *bad_wr; | |
3316 | ||
4c22e07f SG |
3317 | isert_info("conn %p\n", isert_conn); |
3318 | ||
dac6ab30 | 3319 | init_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3320 | isert_conn->beacon.wr_id = ISER_BEACON_WRID; |
3321 | /* post an indication that all flush errors were consumed */ | |
dac6ab30 | 3322 | if (ib_post_recv(isert_conn->qp, &isert_conn->beacon, &bad_wr)) { |
24f412dd | 3323 | isert_err("conn %p failed to post beacon", isert_conn); |
bdf20e72 SG |
3324 | return; |
3325 | } | |
3326 | ||
dac6ab30 | 3327 | wait_for_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3328 | } |
3329 | ||
3e03c4b0 JD |
3330 | /** |
3331 | * isert_put_unsol_pending_cmds() - Drop commands waiting for | |
3332 | * unsolicitate dataout | |
3333 | * @conn: iscsi connection | |
3334 | * | |
3335 | * We might still have commands that are waiting for unsolicited | |
3336 | * dataouts messages. We must put the extra reference on those | |
3337 | * before blocking on the target_wait_for_session_cmds | |
3338 | */ | |
3339 | static void | |
3340 | isert_put_unsol_pending_cmds(struct iscsi_conn *conn) | |
3341 | { | |
3342 | struct iscsi_cmd *cmd, *tmp; | |
3343 | static LIST_HEAD(drop_cmd_list); | |
3344 | ||
3345 | spin_lock_bh(&conn->cmd_lock); | |
3346 | list_for_each_entry_safe(cmd, tmp, &conn->conn_cmd_list, i_conn_node) { | |
3347 | if ((cmd->cmd_flags & ICF_NON_IMMEDIATE_UNSOLICITED_DATA) && | |
3348 | (cmd->write_data_done < conn->sess->sess_ops->FirstBurstLength) && | |
3349 | (cmd->write_data_done < cmd->se_cmd.data_length)) | |
3350 | list_move_tail(&cmd->i_conn_node, &drop_cmd_list); | |
3351 | } | |
3352 | spin_unlock_bh(&conn->cmd_lock); | |
3353 | ||
3354 | list_for_each_entry_safe(cmd, tmp, &drop_cmd_list, i_conn_node) { | |
3355 | list_del_init(&cmd->i_conn_node); | |
3356 | if (cmd->i_state != ISTATE_REMOVE) { | |
3357 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
3358 | ||
3359 | isert_info("conn %p dropping cmd %p\n", conn, cmd); | |
3360 | isert_put_cmd(isert_cmd, true); | |
3361 | } | |
3362 | } | |
3363 | } | |
3364 | ||
defd8848 | 3365 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
3366 | { |
3367 | struct isert_conn *isert_conn = conn->context; | |
3368 | ||
4c22e07f | 3369 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 3370 | |
dac6ab30 | 3371 | mutex_lock(&isert_conn->mutex); |
b8d26b3b | 3372 | /* |
dac6ab30 | 3373 | * Only wait for wait_comp_err if the isert_conn made it |
b8d26b3b NB |
3374 | * into full feature phase.. |
3375 | */ | |
b2cb9649 | 3376 | if (isert_conn->state == ISER_CONN_INIT) { |
dac6ab30 | 3377 | mutex_unlock(&isert_conn->mutex); |
b2cb9649 | 3378 | return; |
b8d26b3b | 3379 | } |
954f2372 | 3380 | isert_conn_terminate(isert_conn); |
dac6ab30 | 3381 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 3382 | |
bdf20e72 | 3383 | isert_wait4flush(isert_conn); |
3e03c4b0 JD |
3384 | isert_put_unsol_pending_cmds(conn); |
3385 | isert_wait4cmds(conn); | |
991bb764 | 3386 | isert_wait4logout(isert_conn); |
954f2372 | 3387 | |
b02efbfc | 3388 | queue_work(isert_release_wq, &isert_conn->release_work); |
defd8848 NB |
3389 | } |
3390 | ||
3391 | static void isert_free_conn(struct iscsi_conn *conn) | |
3392 | { | |
3393 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b | 3394 | |
524630d5 | 3395 | isert_wait4flush(isert_conn); |
b8d26b3b NB |
3396 | isert_put_conn(isert_conn); |
3397 | } | |
3398 | ||
3399 | static struct iscsit_transport iser_target_transport = { | |
3400 | .name = "IB/iSER", | |
3401 | .transport_type = ISCSI_INFINIBAND, | |
d703ce2f | 3402 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
3403 | .owner = THIS_MODULE, |
3404 | .iscsit_setup_np = isert_setup_np, | |
3405 | .iscsit_accept_np = isert_accept_np, | |
3406 | .iscsit_free_np = isert_free_np, | |
defd8848 | 3407 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 3408 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
3409 | .iscsit_get_login_rx = isert_get_login_rx, |
3410 | .iscsit_put_login_tx = isert_put_login_tx, | |
3411 | .iscsit_immediate_queue = isert_immediate_queue, | |
3412 | .iscsit_response_queue = isert_response_queue, | |
3413 | .iscsit_get_dataout = isert_get_dataout, | |
3414 | .iscsit_queue_data_in = isert_put_datain, | |
3415 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 3416 | .iscsit_aborted_task = isert_aborted_task, |
e70beee7 | 3417 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
3418 | }; |
3419 | ||
3420 | static int __init isert_init(void) | |
3421 | { | |
3422 | int ret; | |
3423 | ||
631af550 SG |
3424 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
3425 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 3426 | if (!isert_comp_wq) { |
24f412dd | 3427 | isert_err("Unable to allocate isert_comp_wq\n"); |
b8d26b3b | 3428 | ret = -ENOMEM; |
6f0fae3d | 3429 | return -ENOMEM; |
b8d26b3b NB |
3430 | } |
3431 | ||
b02efbfc SG |
3432 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
3433 | WQ_UNBOUND_MAX_ACTIVE); | |
3434 | if (!isert_release_wq) { | |
24f412dd | 3435 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
3436 | ret = -ENOMEM; |
3437 | goto destroy_comp_wq; | |
3438 | } | |
3439 | ||
b8d26b3b | 3440 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 3441 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 3442 | |
b8d26b3b NB |
3443 | return 0; |
3444 | ||
b02efbfc SG |
3445 | destroy_comp_wq: |
3446 | destroy_workqueue(isert_comp_wq); | |
6f0fae3d | 3447 | |
b8d26b3b NB |
3448 | return ret; |
3449 | } | |
3450 | ||
3451 | static void __exit isert_exit(void) | |
3452 | { | |
f5ebec96 | 3453 | flush_scheduled_work(); |
b02efbfc | 3454 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 3455 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 3456 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 3457 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
b8d26b3b NB |
3458 | } |
3459 | ||
3460 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
9e35eff4 | 3461 | MODULE_VERSION("1.0"); |
b8d26b3b NB |
3462 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
3463 | MODULE_LICENSE("GPL"); | |
3464 | ||
3465 | module_init(isert_init); | |
3466 | module_exit(isert_exit); |