Commit | Line | Data |
---|---|---|
b8d26b3b NB |
1 | /******************************************************************************* |
2 | * This file contains iSCSI extentions for RDMA (iSER) Verbs | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2013 Datera, Inc. |
b8d26b3b NB |
5 | * |
6 | * Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ****************************************************************************/ | |
18 | ||
19 | #include <linux/string.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/scatterlist.h> | |
22 | #include <linux/socket.h> | |
23 | #include <linux/in.h> | |
24 | #include <linux/in6.h> | |
25 | #include <rdma/ib_verbs.h> | |
26 | #include <rdma/rdma_cm.h> | |
27 | #include <target/target_core_base.h> | |
28 | #include <target/target_core_fabric.h> | |
29 | #include <target/iscsi/iscsi_transport.h> | |
531b7bf4 | 30 | #include <linux/semaphore.h> |
b8d26b3b NB |
31 | |
32 | #include "isert_proto.h" | |
33 | #include "ib_isert.h" | |
34 | ||
35 | #define ISERT_MAX_CONN 8 | |
36 | #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN) | |
37 | #define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * ISERT_MAX_CONN) | |
bdf20e72 SG |
38 | #define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \ |
39 | ISERT_MAX_CONN) | |
b8d26b3b | 40 | |
45678b6b | 41 | static int isert_debug_level; |
24f412dd SG |
42 | module_param_named(debug_level, isert_debug_level, int, 0644); |
43 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)"); | |
44 | ||
b8d26b3b NB |
45 | static DEFINE_MUTEX(device_list_mutex); |
46 | static LIST_HEAD(device_list); | |
b8d26b3b | 47 | static struct workqueue_struct *isert_comp_wq; |
b02efbfc | 48 | static struct workqueue_struct *isert_release_wq; |
b8d26b3b | 49 | |
d40945d8 VP |
50 | static void |
51 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); | |
52 | static int | |
53 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
54 | struct isert_rdma_wr *wr); | |
59464ef4 | 55 | static void |
a3a5a826 | 56 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); |
59464ef4 | 57 | static int |
a3a5a826 SG |
58 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
59 | struct isert_rdma_wr *wr); | |
f93f3a70 SG |
60 | static int |
61 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); | |
2371e5da SG |
62 | static int |
63 | isert_rdma_post_recvl(struct isert_conn *isert_conn); | |
64 | static int | |
65 | isert_rdma_accept(struct isert_conn *isert_conn); | |
ca6c1d82 | 66 | struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); |
d40945d8 | 67 | |
2f1b6b7d SG |
68 | static void isert_release_work(struct work_struct *work); |
69 | ||
302cc7c3 SG |
70 | static inline bool |
71 | isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) | |
72 | { | |
23a548ee | 73 | return (conn->pi_support && |
302cc7c3 SG |
74 | cmd->prot_op != TARGET_PROT_NORMAL); |
75 | } | |
76 | ||
77 | ||
b8d26b3b NB |
78 | static void |
79 | isert_qp_event_callback(struct ib_event *e, void *context) | |
80 | { | |
6700425e | 81 | struct isert_conn *isert_conn = context; |
b8d26b3b | 82 | |
ea8a1616 SG |
83 | isert_err("%s (%d): conn %p\n", |
84 | ib_event_msg(e->event), e->event, isert_conn); | |
85 | ||
b8d26b3b NB |
86 | switch (e->event) { |
87 | case IB_EVENT_COMM_EST: | |
dac6ab30 | 88 | rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST); |
b8d26b3b NB |
89 | break; |
90 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
4c22e07f | 91 | isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); |
b8d26b3b NB |
92 | break; |
93 | default: | |
94 | break; | |
95 | } | |
96 | } | |
97 | ||
98 | static int | |
99 | isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) | |
100 | { | |
101 | int ret; | |
102 | ||
103 | ret = ib_query_device(ib_dev, devattr); | |
104 | if (ret) { | |
24f412dd | 105 | isert_err("ib_query_device() failed: %d\n", ret); |
b8d26b3b NB |
106 | return ret; |
107 | } | |
24f412dd SG |
108 | isert_dbg("devattr->max_sge: %d\n", devattr->max_sge); |
109 | isert_dbg("devattr->max_sge_rd: %d\n", devattr->max_sge_rd); | |
b8d26b3b NB |
110 | |
111 | return 0; | |
112 | } | |
113 | ||
40fc069a SG |
114 | static struct isert_comp * |
115 | isert_comp_get(struct isert_conn *isert_conn) | |
b8d26b3b | 116 | { |
dac6ab30 | 117 | struct isert_device *device = isert_conn->device; |
4a295bae | 118 | struct isert_comp *comp; |
40fc069a | 119 | int i, min = 0; |
b8d26b3b | 120 | |
b8d26b3b | 121 | mutex_lock(&device_list_mutex); |
4a295bae SG |
122 | for (i = 0; i < device->comps_used; i++) |
123 | if (device->comps[i].active_qps < | |
124 | device->comps[min].active_qps) | |
125 | min = i; | |
126 | comp = &device->comps[min]; | |
127 | comp->active_qps++; | |
40fc069a SG |
128 | mutex_unlock(&device_list_mutex); |
129 | ||
24f412dd | 130 | isert_info("conn %p, using comp %p min_index: %d\n", |
4a295bae | 131 | isert_conn, comp, min); |
40fc069a SG |
132 | |
133 | return comp; | |
134 | } | |
135 | ||
136 | static void | |
137 | isert_comp_put(struct isert_comp *comp) | |
138 | { | |
139 | mutex_lock(&device_list_mutex); | |
140 | comp->active_qps--; | |
b8d26b3b | 141 | mutex_unlock(&device_list_mutex); |
40fc069a SG |
142 | } |
143 | ||
144 | static struct ib_qp * | |
145 | isert_create_qp(struct isert_conn *isert_conn, | |
146 | struct isert_comp *comp, | |
147 | struct rdma_cm_id *cma_id) | |
148 | { | |
dac6ab30 | 149 | struct isert_device *device = isert_conn->device; |
40fc069a SG |
150 | struct ib_qp_init_attr attr; |
151 | int ret; | |
b8d26b3b NB |
152 | |
153 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); | |
154 | attr.event_handler = isert_qp_event_callback; | |
155 | attr.qp_context = isert_conn; | |
6f0fae3d SG |
156 | attr.send_cq = comp->cq; |
157 | attr.recv_cq = comp->cq; | |
b8d26b3b | 158 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; |
bdf20e72 | 159 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; |
b8d26b3b NB |
160 | /* |
161 | * FIXME: Use devattr.max_sge - 2 for max_send_sge as | |
f57915cf OG |
162 | * work-around for RDMA_READs with ConnectX-2. |
163 | * | |
164 | * Also, still make sure to have at least two SGEs for | |
165 | * outgoing control PDU responses. | |
b8d26b3b | 166 | */ |
f57915cf | 167 | attr.cap.max_send_sge = max(2, device->dev_attr.max_sge - 2); |
b8d26b3b NB |
168 | isert_conn->max_sge = attr.cap.max_send_sge; |
169 | ||
170 | attr.cap.max_recv_sge = 1; | |
171 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
172 | attr.qp_type = IB_QPT_RC; | |
570db170 | 173 | if (device->pi_capable) |
d3e125da | 174 | attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; |
b8d26b3b | 175 | |
67cb3949 | 176 | ret = rdma_create_qp(cma_id, device->pd, &attr); |
b8d26b3b | 177 | if (ret) { |
24f412dd | 178 | isert_err("rdma_create_qp failed for cma_id %d\n", ret); |
40fc069a SG |
179 | return ERR_PTR(ret); |
180 | } | |
181 | ||
182 | return cma_id->qp; | |
183 | } | |
184 | ||
185 | static int | |
186 | isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) | |
187 | { | |
188 | struct isert_comp *comp; | |
189 | int ret; | |
190 | ||
191 | comp = isert_comp_get(isert_conn); | |
dac6ab30 SG |
192 | isert_conn->qp = isert_create_qp(isert_conn, comp, cma_id); |
193 | if (IS_ERR(isert_conn->qp)) { | |
194 | ret = PTR_ERR(isert_conn->qp); | |
19e2090f | 195 | goto err; |
b8d26b3b | 196 | } |
b8d26b3b NB |
197 | |
198 | return 0; | |
19e2090f | 199 | err: |
40fc069a | 200 | isert_comp_put(comp); |
19e2090f | 201 | return ret; |
b8d26b3b NB |
202 | } |
203 | ||
204 | static void | |
205 | isert_cq_event_callback(struct ib_event *e, void *context) | |
206 | { | |
4c22e07f | 207 | isert_dbg("event: %d\n", e->event); |
b8d26b3b NB |
208 | } |
209 | ||
210 | static int | |
211 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
212 | { | |
dac6ab30 | 213 | struct isert_device *device = isert_conn->device; |
67cb3949 | 214 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
215 | struct iser_rx_desc *rx_desc; |
216 | struct ib_sge *rx_sg; | |
217 | u64 dma_addr; | |
218 | int i, j; | |
219 | ||
dac6ab30 | 220 | isert_conn->rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * |
b8d26b3b | 221 | sizeof(struct iser_rx_desc), GFP_KERNEL); |
dac6ab30 | 222 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
223 | goto fail; |
224 | ||
dac6ab30 | 225 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
226 | |
227 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
228 | dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, | |
229 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
230 | if (ib_dma_mapping_error(ib_dev, dma_addr)) | |
231 | goto dma_map_fail; | |
232 | ||
233 | rx_desc->dma_addr = dma_addr; | |
234 | ||
235 | rx_sg = &rx_desc->rx_sg; | |
236 | rx_sg->addr = rx_desc->dma_addr; | |
237 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; | |
34efc7df | 238 | rx_sg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
239 | } |
240 | ||
b8d26b3b NB |
241 | return 0; |
242 | ||
243 | dma_map_fail: | |
dac6ab30 | 244 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
245 | for (j = 0; j < i; j++, rx_desc++) { |
246 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
247 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
248 | } | |
dac6ab30 SG |
249 | kfree(isert_conn->rx_descs); |
250 | isert_conn->rx_descs = NULL; | |
b8d26b3b | 251 | fail: |
4c22e07f SG |
252 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
253 | ||
b8d26b3b NB |
254 | return -ENOMEM; |
255 | } | |
256 | ||
257 | static void | |
258 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
259 | { | |
dac6ab30 | 260 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
261 | struct iser_rx_desc *rx_desc; |
262 | int i; | |
263 | ||
dac6ab30 | 264 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
265 | return; |
266 | ||
dac6ab30 | 267 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
268 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
269 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
270 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
271 | } | |
272 | ||
dac6ab30 SG |
273 | kfree(isert_conn->rx_descs); |
274 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
275 | } |
276 | ||
6f0fae3d SG |
277 | static void isert_cq_work(struct work_struct *); |
278 | static void isert_cq_callback(struct ib_cq *, void *); | |
b8d26b3b | 279 | |
172369c5 SG |
280 | static void |
281 | isert_free_comps(struct isert_device *device) | |
b8d26b3b | 282 | { |
172369c5 | 283 | int i; |
59464ef4 | 284 | |
172369c5 SG |
285 | for (i = 0; i < device->comps_used; i++) { |
286 | struct isert_comp *comp = &device->comps[i]; | |
b1a5ad00 | 287 | |
172369c5 SG |
288 | if (comp->cq) { |
289 | cancel_work_sync(&comp->work); | |
290 | ib_destroy_cq(comp->cq); | |
291 | } | |
59464ef4 | 292 | } |
172369c5 SG |
293 | kfree(device->comps); |
294 | } | |
d40945d8 | 295 | |
172369c5 SG |
296 | static int |
297 | isert_alloc_comps(struct isert_device *device, | |
298 | struct ib_device_attr *attr) | |
299 | { | |
300 | int i, max_cqe, ret = 0; | |
d3e125da | 301 | |
4a295bae | 302 | device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), |
172369c5 SG |
303 | device->ib_device->num_comp_vectors)); |
304 | ||
24f412dd | 305 | isert_info("Using %d CQs, %s supports %d vectors support " |
4a295bae SG |
306 | "Fast registration %d pi_capable %d\n", |
307 | device->comps_used, device->ib_device->name, | |
308 | device->ib_device->num_comp_vectors, device->use_fastreg, | |
309 | device->pi_capable); | |
310 | ||
311 | device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), | |
312 | GFP_KERNEL); | |
313 | if (!device->comps) { | |
24f412dd | 314 | isert_err("Unable to allocate completion contexts\n"); |
b8d26b3b NB |
315 | return -ENOMEM; |
316 | } | |
4a295bae | 317 | |
172369c5 SG |
318 | max_cqe = min(ISER_MAX_CQ_LEN, attr->max_cqe); |
319 | ||
4a295bae | 320 | for (i = 0; i < device->comps_used; i++) { |
8e37210b | 321 | struct ib_cq_init_attr cq_attr = {}; |
4a295bae SG |
322 | struct isert_comp *comp = &device->comps[i]; |
323 | ||
324 | comp->device = device; | |
6f0fae3d | 325 | INIT_WORK(&comp->work, isert_cq_work); |
8e37210b MB |
326 | cq_attr.cqe = max_cqe; |
327 | cq_attr.comp_vector = i; | |
6f0fae3d SG |
328 | comp->cq = ib_create_cq(device->ib_device, |
329 | isert_cq_callback, | |
330 | isert_cq_event_callback, | |
331 | (void *)comp, | |
8e37210b | 332 | &cq_attr); |
6f0fae3d | 333 | if (IS_ERR(comp->cq)) { |
172369c5 | 334 | isert_err("Unable to allocate cq\n"); |
6f0fae3d SG |
335 | ret = PTR_ERR(comp->cq); |
336 | comp->cq = NULL; | |
b8d26b3b | 337 | goto out_cq; |
94a71110 | 338 | } |
b8d26b3b | 339 | |
6f0fae3d | 340 | ret = ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
94a71110 | 341 | if (ret) |
b8d26b3b NB |
342 | goto out_cq; |
343 | } | |
344 | ||
172369c5 SG |
345 | return 0; |
346 | out_cq: | |
347 | isert_free_comps(device); | |
348 | return ret; | |
349 | } | |
350 | ||
351 | static int | |
352 | isert_create_device_ib_res(struct isert_device *device) | |
353 | { | |
172369c5 | 354 | struct ib_device_attr *dev_attr; |
fd8205e8 | 355 | int ret; |
172369c5 SG |
356 | |
357 | dev_attr = &device->dev_attr; | |
fd8205e8 | 358 | ret = isert_query_device(device->ib_device, dev_attr); |
172369c5 | 359 | if (ret) |
373a4cd7 | 360 | goto out; |
172369c5 SG |
361 | |
362 | /* asign function handlers */ | |
363 | if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS && | |
364 | dev_attr->device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) { | |
365 | device->use_fastreg = 1; | |
366 | device->reg_rdma_mem = isert_reg_rdma; | |
367 | device->unreg_rdma_mem = isert_unreg_rdma; | |
368 | } else { | |
369 | device->use_fastreg = 0; | |
370 | device->reg_rdma_mem = isert_map_rdma; | |
371 | device->unreg_rdma_mem = isert_unmap_cmd; | |
372 | } | |
373 | ||
374 | ret = isert_alloc_comps(device, dev_attr); | |
375 | if (ret) | |
373a4cd7 | 376 | goto out; |
172369c5 | 377 | |
67cb3949 SG |
378 | device->pd = ib_alloc_pd(device->ib_device); |
379 | if (IS_ERR(device->pd)) { | |
380 | ret = PTR_ERR(device->pd); | |
381 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
382 | device, ret); | |
383 | goto out_cq; | |
384 | } | |
385 | ||
172369c5 SG |
386 | /* Check signature cap */ |
387 | device->pi_capable = dev_attr->device_cap_flags & | |
388 | IB_DEVICE_SIGNATURE_HANDOVER ? true : false; | |
67cb3949 | 389 | |
b8d26b3b NB |
390 | return 0; |
391 | ||
392 | out_cq: | |
172369c5 | 393 | isert_free_comps(device); |
373a4cd7 NB |
394 | out: |
395 | if (ret > 0) | |
396 | ret = -EINVAL; | |
b8d26b3b NB |
397 | return ret; |
398 | } | |
399 | ||
400 | static void | |
401 | isert_free_device_ib_res(struct isert_device *device) | |
402 | { | |
24f412dd | 403 | isert_info("device %p\n", device); |
b8d26b3b | 404 | |
67cb3949 | 405 | ib_dealloc_pd(device->pd); |
172369c5 | 406 | isert_free_comps(device); |
b8d26b3b NB |
407 | } |
408 | ||
409 | static void | |
cf8ae958 | 410 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
411 | { |
412 | mutex_lock(&device_list_mutex); | |
413 | device->refcount--; | |
4c22e07f | 414 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
415 | if (!device->refcount) { |
416 | isert_free_device_ib_res(device); | |
417 | list_del(&device->dev_node); | |
418 | kfree(device); | |
419 | } | |
420 | mutex_unlock(&device_list_mutex); | |
421 | } | |
422 | ||
423 | static struct isert_device * | |
cf8ae958 | 424 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
425 | { |
426 | struct isert_device *device; | |
427 | int ret; | |
428 | ||
429 | mutex_lock(&device_list_mutex); | |
430 | list_for_each_entry(device, &device_list, dev_node) { | |
431 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
432 | device->refcount++; | |
4c22e07f SG |
433 | isert_info("Found iser device %p refcount %d\n", |
434 | device, device->refcount); | |
b8d26b3b NB |
435 | mutex_unlock(&device_list_mutex); |
436 | return device; | |
437 | } | |
438 | } | |
439 | ||
440 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
441 | if (!device) { | |
442 | mutex_unlock(&device_list_mutex); | |
443 | return ERR_PTR(-ENOMEM); | |
444 | } | |
445 | ||
446 | INIT_LIST_HEAD(&device->dev_node); | |
447 | ||
448 | device->ib_device = cma_id->device; | |
449 | ret = isert_create_device_ib_res(device); | |
450 | if (ret) { | |
451 | kfree(device); | |
452 | mutex_unlock(&device_list_mutex); | |
453 | return ERR_PTR(ret); | |
454 | } | |
455 | ||
456 | device->refcount++; | |
457 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
458 | isert_info("Created a new iser device %p refcount %d\n", |
459 | device, device->refcount); | |
b8d26b3b NB |
460 | mutex_unlock(&device_list_mutex); |
461 | ||
462 | return device; | |
463 | } | |
464 | ||
59464ef4 | 465 | static void |
a3a5a826 | 466 | isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
467 | { |
468 | struct fast_reg_descriptor *fr_desc, *tmp; | |
469 | int i = 0; | |
470 | ||
dac6ab30 | 471 | if (list_empty(&isert_conn->fr_pool)) |
59464ef4 VP |
472 | return; |
473 | ||
4c22e07f | 474 | isert_info("Freeing conn %p fastreg pool", isert_conn); |
59464ef4 VP |
475 | |
476 | list_for_each_entry_safe(fr_desc, tmp, | |
dac6ab30 | 477 | &isert_conn->fr_pool, list) { |
59464ef4 | 478 | list_del(&fr_desc->list); |
59464ef4 | 479 | ib_dereg_mr(fr_desc->data_mr); |
d3e125da | 480 | if (fr_desc->pi_ctx) { |
d3e125da | 481 | ib_dereg_mr(fr_desc->pi_ctx->prot_mr); |
8b91ffc1 | 482 | ib_dereg_mr(fr_desc->pi_ctx->sig_mr); |
d3e125da SG |
483 | kfree(fr_desc->pi_ctx); |
484 | } | |
59464ef4 VP |
485 | kfree(fr_desc); |
486 | ++i; | |
487 | } | |
488 | ||
dac6ab30 | 489 | if (i < isert_conn->fr_pool_size) |
24f412dd | 490 | isert_warn("Pool still has %d regions registered\n", |
dac6ab30 | 491 | isert_conn->fr_pool_size - i); |
59464ef4 VP |
492 | } |
493 | ||
570db170 SG |
494 | static int |
495 | isert_create_pi_ctx(struct fast_reg_descriptor *desc, | |
496 | struct ib_device *device, | |
497 | struct ib_pd *pd) | |
498 | { | |
570db170 SG |
499 | struct pi_context *pi_ctx; |
500 | int ret; | |
501 | ||
502 | pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL); | |
503 | if (!pi_ctx) { | |
24f412dd | 504 | isert_err("Failed to allocate pi context\n"); |
570db170 SG |
505 | return -ENOMEM; |
506 | } | |
507 | ||
a89be2cc SG |
508 | pi_ctx->prot_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, |
509 | ISCSI_ISER_SG_TABLESIZE); | |
570db170 | 510 | if (IS_ERR(pi_ctx->prot_mr)) { |
24f412dd | 511 | isert_err("Failed to allocate prot frmr err=%ld\n", |
570db170 SG |
512 | PTR_ERR(pi_ctx->prot_mr)); |
513 | ret = PTR_ERR(pi_ctx->prot_mr); | |
16c2d702 | 514 | goto err_pi_ctx; |
570db170 SG |
515 | } |
516 | desc->ind |= ISERT_PROT_KEY_VALID; | |
517 | ||
9bee178b | 518 | pi_ctx->sig_mr = ib_alloc_mr(pd, IB_MR_TYPE_SIGNATURE, 2); |
570db170 | 519 | if (IS_ERR(pi_ctx->sig_mr)) { |
24f412dd | 520 | isert_err("Failed to allocate signature enabled mr err=%ld\n", |
570db170 SG |
521 | PTR_ERR(pi_ctx->sig_mr)); |
522 | ret = PTR_ERR(pi_ctx->sig_mr); | |
523 | goto err_prot_mr; | |
524 | } | |
525 | ||
526 | desc->pi_ctx = pi_ctx; | |
527 | desc->ind |= ISERT_SIG_KEY_VALID; | |
528 | desc->ind &= ~ISERT_PROTECTED; | |
529 | ||
530 | return 0; | |
531 | ||
532 | err_prot_mr: | |
b2feda4f | 533 | ib_dereg_mr(pi_ctx->prot_mr); |
570db170 | 534 | err_pi_ctx: |
b2feda4f | 535 | kfree(pi_ctx); |
570db170 SG |
536 | |
537 | return ret; | |
538 | } | |
539 | ||
dc87a90f SG |
540 | static int |
541 | isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, | |
570db170 | 542 | struct fast_reg_descriptor *fr_desc) |
dc87a90f | 543 | { |
a89be2cc SG |
544 | fr_desc->data_mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG, |
545 | ISCSI_ISER_SG_TABLESIZE); | |
dc87a90f | 546 | if (IS_ERR(fr_desc->data_mr)) { |
24f412dd | 547 | isert_err("Failed to allocate data frmr err=%ld\n", |
4c22e07f | 548 | PTR_ERR(fr_desc->data_mr)); |
16c2d702 | 549 | return PTR_ERR(fr_desc->data_mr); |
dc87a90f | 550 | } |
d3e125da SG |
551 | fr_desc->ind |= ISERT_DATA_KEY_VALID; |
552 | ||
24f412dd | 553 | isert_dbg("Created fr_desc %p\n", fr_desc); |
dc87a90f SG |
554 | |
555 | return 0; | |
59464ef4 VP |
556 | } |
557 | ||
558 | static int | |
570db170 | 559 | isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
560 | { |
561 | struct fast_reg_descriptor *fr_desc; | |
dac6ab30 | 562 | struct isert_device *device = isert_conn->device; |
f46d6a8a NB |
563 | struct se_session *se_sess = isert_conn->conn->sess->se_sess; |
564 | struct se_node_acl *se_nacl = se_sess->se_node_acl; | |
565 | int i, ret, tag_num; | |
566 | /* | |
567 | * Setup the number of FRMRs based upon the number of tags | |
568 | * available to session in iscsi_target_locate_portal(). | |
569 | */ | |
570 | tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth); | |
571 | tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; | |
59464ef4 | 572 | |
dac6ab30 | 573 | isert_conn->fr_pool_size = 0; |
f46d6a8a | 574 | for (i = 0; i < tag_num; i++) { |
59464ef4 VP |
575 | fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); |
576 | if (!fr_desc) { | |
24f412dd | 577 | isert_err("Failed to allocate fast_reg descriptor\n"); |
59464ef4 VP |
578 | ret = -ENOMEM; |
579 | goto err; | |
580 | } | |
581 | ||
dc87a90f | 582 | ret = isert_create_fr_desc(device->ib_device, |
67cb3949 | 583 | device->pd, fr_desc); |
dc87a90f | 584 | if (ret) { |
24f412dd | 585 | isert_err("Failed to create fastreg descriptor err=%d\n", |
dc87a90f | 586 | ret); |
a80e21b3 | 587 | kfree(fr_desc); |
59464ef4 VP |
588 | goto err; |
589 | } | |
59464ef4 | 590 | |
dac6ab30 SG |
591 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); |
592 | isert_conn->fr_pool_size++; | |
59464ef4 VP |
593 | } |
594 | ||
24f412dd | 595 | isert_dbg("Creating conn %p fastreg pool size=%d", |
dac6ab30 | 596 | isert_conn, isert_conn->fr_pool_size); |
59464ef4 VP |
597 | |
598 | return 0; | |
599 | ||
600 | err: | |
a3a5a826 | 601 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 VP |
602 | return ret; |
603 | } | |
604 | ||
ae9ea9ed SG |
605 | static void |
606 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 607 | { |
b8d26b3b | 608 | isert_conn->state = ISER_CONN_INIT; |
bd379220 | 609 | INIT_LIST_HEAD(&isert_conn->node); |
dac6ab30 | 610 | init_completion(&isert_conn->login_comp); |
2371e5da | 611 | init_completion(&isert_conn->login_req_comp); |
dac6ab30 SG |
612 | init_completion(&isert_conn->wait); |
613 | kref_init(&isert_conn->kref); | |
614 | mutex_init(&isert_conn->mutex); | |
615 | spin_lock_init(&isert_conn->pool_lock); | |
616 | INIT_LIST_HEAD(&isert_conn->fr_pool); | |
2f1b6b7d | 617 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
ae9ea9ed | 618 | } |
b8d26b3b | 619 | |
ae9ea9ed SG |
620 | static void |
621 | isert_free_login_buf(struct isert_conn *isert_conn) | |
622 | { | |
dac6ab30 | 623 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
624 | |
625 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
626 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
627 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
628 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
629 | DMA_FROM_DEVICE); | |
630 | kfree(isert_conn->login_buf); | |
631 | } | |
632 | ||
633 | static int | |
634 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
635 | struct ib_device *ib_dev) | |
636 | { | |
637 | int ret; | |
b8d26b3b NB |
638 | |
639 | isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + | |
640 | ISER_RX_LOGIN_SIZE, GFP_KERNEL); | |
641 | if (!isert_conn->login_buf) { | |
24f412dd | 642 | isert_err("Unable to allocate isert_conn->login_buf\n"); |
ae9ea9ed | 643 | return -ENOMEM; |
b8d26b3b NB |
644 | } |
645 | ||
646 | isert_conn->login_req_buf = isert_conn->login_buf; | |
647 | isert_conn->login_rsp_buf = isert_conn->login_buf + | |
648 | ISCSI_DEF_MAX_RECV_SEG_LEN; | |
ae9ea9ed | 649 | |
24f412dd | 650 | isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", |
b8d26b3b NB |
651 | isert_conn->login_buf, isert_conn->login_req_buf, |
652 | isert_conn->login_rsp_buf); | |
653 | ||
654 | isert_conn->login_req_dma = ib_dma_map_single(ib_dev, | |
655 | (void *)isert_conn->login_req_buf, | |
656 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
657 | ||
658 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); | |
659 | if (ret) { | |
ae9ea9ed | 660 | isert_err("login_req_dma mapping error: %d\n", ret); |
b8d26b3b NB |
661 | isert_conn->login_req_dma = 0; |
662 | goto out_login_buf; | |
663 | } | |
664 | ||
665 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
666 | (void *)isert_conn->login_rsp_buf, | |
667 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
668 | ||
669 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); | |
670 | if (ret) { | |
ae9ea9ed | 671 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b NB |
672 | isert_conn->login_rsp_dma = 0; |
673 | goto out_req_dma_map; | |
674 | } | |
675 | ||
ae9ea9ed SG |
676 | return 0; |
677 | ||
678 | out_req_dma_map: | |
679 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
680 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
681 | out_login_buf: | |
682 | kfree(isert_conn->login_buf); | |
683 | return ret; | |
684 | } | |
685 | ||
686 | static int | |
687 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
688 | { | |
689 | struct isert_np *isert_np = cma_id->context; | |
690 | struct iscsi_np *np = isert_np->np; | |
691 | struct isert_conn *isert_conn; | |
692 | struct isert_device *device; | |
693 | int ret = 0; | |
694 | ||
695 | spin_lock_bh(&np->np_thread_lock); | |
696 | if (!np->enabled) { | |
697 | spin_unlock_bh(&np->np_thread_lock); | |
698 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
699 | return rdma_reject(cma_id, NULL, 0); | |
700 | } | |
701 | spin_unlock_bh(&np->np_thread_lock); | |
702 | ||
703 | isert_dbg("cma_id: %p, portal: %p\n", | |
704 | cma_id, cma_id->context); | |
705 | ||
706 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
707 | if (!isert_conn) | |
708 | return -ENOMEM; | |
709 | ||
710 | isert_init_conn(isert_conn); | |
dac6ab30 | 711 | isert_conn->cm_id = cma_id; |
ae9ea9ed SG |
712 | |
713 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); | |
714 | if (ret) | |
715 | goto out; | |
716 | ||
cf8ae958 | 717 | device = isert_device_get(cma_id); |
b8d26b3b NB |
718 | if (IS_ERR(device)) { |
719 | ret = PTR_ERR(device); | |
720 | goto out_rsp_dma_map; | |
721 | } | |
dac6ab30 | 722 | isert_conn->device = device; |
b8d26b3b | 723 | |
1a92e17e SG |
724 | /* Set max inflight RDMA READ requests */ |
725 | isert_conn->initiator_depth = min_t(u8, | |
726 | event->param.conn.initiator_depth, | |
727 | device->dev_attr.max_qp_init_rd_atom); | |
24f412dd | 728 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); |
1a92e17e | 729 | |
570db170 | 730 | ret = isert_conn_setup_qp(isert_conn, cma_id); |
b8d26b3b NB |
731 | if (ret) |
732 | goto out_conn_dev; | |
733 | ||
2371e5da SG |
734 | ret = isert_rdma_post_recvl(isert_conn); |
735 | if (ret) | |
736 | goto out_conn_dev; | |
737 | ||
738 | ret = isert_rdma_accept(isert_conn); | |
739 | if (ret) | |
740 | goto out_conn_dev; | |
741 | ||
ed8cb0a4 | 742 | mutex_lock(&isert_np->mutex); |
bd379220 | 743 | list_add_tail(&isert_conn->node, &isert_np->accepted); |
ed8cb0a4 | 744 | mutex_unlock(&isert_np->mutex); |
b8d26b3b | 745 | |
b8d26b3b NB |
746 | return 0; |
747 | ||
748 | out_conn_dev: | |
cf8ae958 | 749 | isert_device_put(device); |
b8d26b3b | 750 | out_rsp_dma_map: |
ae9ea9ed | 751 | isert_free_login_buf(isert_conn); |
b8d26b3b NB |
752 | out: |
753 | kfree(isert_conn); | |
2371e5da | 754 | rdma_reject(cma_id, NULL, 0); |
b8d26b3b NB |
755 | return ret; |
756 | } | |
757 | ||
758 | static void | |
759 | isert_connect_release(struct isert_conn *isert_conn) | |
760 | { | |
dac6ab30 | 761 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 762 | |
4c22e07f | 763 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 764 | |
57df81e3 SG |
765 | BUG_ON(!device); |
766 | ||
767 | if (device->use_fastreg) | |
a3a5a826 | 768 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 | 769 | |
19e2090f | 770 | isert_free_rx_descriptors(isert_conn); |
dac6ab30 SG |
771 | if (isert_conn->cm_id) |
772 | rdma_destroy_id(isert_conn->cm_id); | |
19e2090f | 773 | |
dac6ab30 SG |
774 | if (isert_conn->qp) { |
775 | struct isert_comp *comp = isert_conn->qp->recv_cq->cq_context; | |
4a295bae | 776 | |
40fc069a | 777 | isert_comp_put(comp); |
dac6ab30 | 778 | ib_destroy_qp(isert_conn->qp); |
b8d26b3b NB |
779 | } |
780 | ||
ae9ea9ed SG |
781 | if (isert_conn->login_buf) |
782 | isert_free_login_buf(isert_conn); | |
783 | ||
57df81e3 | 784 | isert_device_put(device); |
b8d26b3b | 785 | |
57df81e3 | 786 | kfree(isert_conn); |
b8d26b3b NB |
787 | } |
788 | ||
789 | static void | |
790 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
791 | { | |
19e2090f | 792 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
bd379220 | 793 | struct isert_np *isert_np = cma_id->context; |
c2f88b17 | 794 | |
24f412dd | 795 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 796 | |
dac6ab30 | 797 | mutex_lock(&isert_conn->mutex); |
bd379220 JD |
798 | isert_conn->state = ISER_CONN_UP; |
799 | kref_get(&isert_conn->kref); | |
dac6ab30 | 800 | mutex_unlock(&isert_conn->mutex); |
bd379220 JD |
801 | |
802 | mutex_lock(&isert_np->mutex); | |
803 | list_move_tail(&isert_conn->node, &isert_np->pending); | |
804 | mutex_unlock(&isert_np->mutex); | |
805 | ||
806 | isert_info("np %p: Allow accept_np to continue\n", isert_np); | |
807 | up(&isert_np->sem); | |
b8d26b3b NB |
808 | } |
809 | ||
810 | static void | |
dac6ab30 | 811 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
812 | { |
813 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 814 | struct isert_conn, kref); |
b8d26b3b | 815 | |
4c22e07f SG |
816 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
817 | current->pid); | |
b8d26b3b NB |
818 | |
819 | isert_connect_release(isert_conn); | |
820 | } | |
821 | ||
822 | static void | |
823 | isert_put_conn(struct isert_conn *isert_conn) | |
824 | { | |
dac6ab30 | 825 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
826 | } |
827 | ||
954f2372 SG |
828 | /** |
829 | * isert_conn_terminate() - Initiate connection termination | |
830 | * @isert_conn: isert connection struct | |
831 | * | |
832 | * Notes: | |
128e9cc8 | 833 | * In case the connection state is FULL_FEATURE, move state |
954f2372 | 834 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 835 | * In case the connection state is UP, complete flush as well. |
954f2372 | 836 | * |
dac6ab30 | 837 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
838 | * safe to call multiple times. |
839 | */ | |
840 | static void | |
841 | isert_conn_terminate(struct isert_conn *isert_conn) | |
842 | { | |
843 | int err; | |
844 | ||
128e9cc8 SG |
845 | switch (isert_conn->state) { |
846 | case ISER_CONN_TERMINATING: | |
847 | break; | |
848 | case ISER_CONN_UP: | |
128e9cc8 | 849 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ |
24f412dd | 850 | isert_info("Terminating conn %p state %d\n", |
954f2372 | 851 | isert_conn, isert_conn->state); |
128e9cc8 | 852 | isert_conn->state = ISER_CONN_TERMINATING; |
dac6ab30 | 853 | err = rdma_disconnect(isert_conn->cm_id); |
954f2372 | 854 | if (err) |
24f412dd | 855 | isert_warn("Failed rdma_disconnect isert_conn %p\n", |
954f2372 | 856 | isert_conn); |
128e9cc8 SG |
857 | break; |
858 | default: | |
24f412dd | 859 | isert_warn("conn %p teminating in state %d\n", |
128e9cc8 | 860 | isert_conn, isert_conn->state); |
954f2372 SG |
861 | } |
862 | } | |
863 | ||
3b726ae2 | 864 | static int |
ca6c1d82 SG |
865 | isert_np_cma_handler(struct isert_np *isert_np, |
866 | enum rdma_cm_event_type event) | |
b8d26b3b | 867 | { |
ea8a1616 SG |
868 | isert_dbg("%s (%d): isert np %p\n", |
869 | rdma_event_msg(event), event, isert_np); | |
3b726ae2 | 870 | |
ca6c1d82 SG |
871 | switch (event) { |
872 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
ed8cb0a4 | 873 | isert_np->cm_id = NULL; |
ca6c1d82 SG |
874 | break; |
875 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
ed8cb0a4 JD |
876 | isert_np->cm_id = isert_setup_id(isert_np); |
877 | if (IS_ERR(isert_np->cm_id)) { | |
24f412dd | 878 | isert_err("isert np %p setup id failed: %ld\n", |
ed8cb0a4 JD |
879 | isert_np, PTR_ERR(isert_np->cm_id)); |
880 | isert_np->cm_id = NULL; | |
ca6c1d82 SG |
881 | } |
882 | break; | |
883 | default: | |
24f412dd | 884 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 885 | isert_np, event); |
3b726ae2 SG |
886 | } |
887 | ||
ca6c1d82 SG |
888 | return -1; |
889 | } | |
890 | ||
891 | static int | |
892 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
893 | enum rdma_cm_event_type event) | |
894 | { | |
895 | struct isert_np *isert_np = cma_id->context; | |
896 | struct isert_conn *isert_conn; | |
2f1b6b7d | 897 | bool terminating = false; |
ca6c1d82 | 898 | |
ed8cb0a4 | 899 | if (isert_np->cm_id == cma_id) |
ca6c1d82 SG |
900 | return isert_np_cma_handler(cma_id->context, event); |
901 | ||
19e2090f | 902 | isert_conn = cma_id->qp->qp_context; |
b8d26b3b | 903 | |
dac6ab30 | 904 | mutex_lock(&isert_conn->mutex); |
2f1b6b7d | 905 | terminating = (isert_conn->state == ISER_CONN_TERMINATING); |
128e9cc8 | 906 | isert_conn_terminate(isert_conn); |
dac6ab30 | 907 | mutex_unlock(&isert_conn->mutex); |
128e9cc8 | 908 | |
dac6ab30 SG |
909 | isert_info("conn %p completing wait\n", isert_conn); |
910 | complete(&isert_conn->wait); | |
3b726ae2 | 911 | |
2f1b6b7d SG |
912 | if (terminating) |
913 | goto out; | |
914 | ||
ed8cb0a4 | 915 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
916 | if (!list_empty(&isert_conn->node)) { |
917 | list_del_init(&isert_conn->node); | |
2f1b6b7d SG |
918 | isert_put_conn(isert_conn); |
919 | queue_work(isert_release_wq, &isert_conn->release_work); | |
920 | } | |
ed8cb0a4 | 921 | mutex_unlock(&isert_np->mutex); |
2f1b6b7d SG |
922 | |
923 | out: | |
3b726ae2 | 924 | return 0; |
b8d26b3b NB |
925 | } |
926 | ||
4a579da2 | 927 | static int |
954f2372 SG |
928 | isert_connect_error(struct rdma_cm_id *cma_id) |
929 | { | |
19e2090f | 930 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
954f2372 | 931 | |
bd379220 | 932 | list_del_init(&isert_conn->node); |
dac6ab30 | 933 | isert_conn->cm_id = NULL; |
954f2372 | 934 | isert_put_conn(isert_conn); |
4a579da2 SG |
935 | |
936 | return -1; | |
954f2372 SG |
937 | } |
938 | ||
b8d26b3b NB |
939 | static int |
940 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
941 | { | |
942 | int ret = 0; | |
943 | ||
ea8a1616 SG |
944 | isert_info("%s (%d): status %d id %p np %p\n", |
945 | rdma_event_msg(event->event), event->event, | |
4c22e07f | 946 | event->status, cma_id, cma_id->context); |
b8d26b3b NB |
947 | |
948 | switch (event->event) { | |
949 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
b8d26b3b | 950 | ret = isert_connect_request(cma_id, event); |
3b726ae2 | 951 | if (ret) |
4c22e07f | 952 | isert_err("failed handle connect request %d\n", ret); |
b8d26b3b NB |
953 | break; |
954 | case RDMA_CM_EVENT_ESTABLISHED: | |
b8d26b3b NB |
955 | isert_connected_handler(cma_id); |
956 | break; | |
88c4015f SG |
957 | case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ |
958 | case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ | |
959 | case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */ | |
88c4015f | 960 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 961 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 962 | break; |
954f2372 SG |
963 | case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ |
964 | case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ | |
b8d26b3b | 965 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 966 | ret = isert_connect_error(cma_id); |
954f2372 | 967 | break; |
b8d26b3b | 968 | default: |
24f412dd | 969 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
970 | break; |
971 | } | |
972 | ||
b8d26b3b NB |
973 | return ret; |
974 | } | |
975 | ||
976 | static int | |
4366b19c | 977 | isert_post_recvm(struct isert_conn *isert_conn, u32 count) |
b8d26b3b NB |
978 | { |
979 | struct ib_recv_wr *rx_wr, *rx_wr_failed; | |
980 | int i, ret; | |
b8d26b3b NB |
981 | struct iser_rx_desc *rx_desc; |
982 | ||
dac6ab30 | 983 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
4366b19c JD |
984 | rx_desc = &isert_conn->rx_descs[i]; |
985 | rx_wr->wr_id = (uintptr_t)rx_desc; | |
986 | rx_wr->sg_list = &rx_desc->rx_sg; | |
987 | rx_wr->num_sge = 1; | |
988 | rx_wr->next = rx_wr + 1; | |
b8d26b3b | 989 | } |
b8d26b3b NB |
990 | rx_wr--; |
991 | rx_wr->next = NULL; /* mark end of work requests list */ | |
992 | ||
993 | isert_conn->post_recv_buf_count += count; | |
dac6ab30 | 994 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, |
4366b19c | 995 | &rx_wr_failed); |
b8d26b3b | 996 | if (ret) { |
24f412dd | 997 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
b8d26b3b | 998 | isert_conn->post_recv_buf_count -= count; |
b8d26b3b | 999 | } |
4366b19c JD |
1000 | |
1001 | return ret; | |
1002 | } | |
1003 | ||
1004 | static int | |
1005 | isert_post_recv(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc) | |
1006 | { | |
1007 | struct ib_recv_wr *rx_wr_failed, rx_wr; | |
1008 | int ret; | |
1009 | ||
1010 | rx_wr.wr_id = (uintptr_t)rx_desc; | |
1011 | rx_wr.sg_list = &rx_desc->rx_sg; | |
1012 | rx_wr.num_sge = 1; | |
1013 | rx_wr.next = NULL; | |
1014 | ||
1015 | isert_conn->post_recv_buf_count++; | |
1016 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_failed); | |
1017 | if (ret) { | |
1018 | isert_err("ib_post_recv() failed with ret: %d\n", ret); | |
1019 | isert_conn->post_recv_buf_count--; | |
1020 | } | |
1021 | ||
b8d26b3b NB |
1022 | return ret; |
1023 | } | |
1024 | ||
1025 | static int | |
1026 | isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) | |
1027 | { | |
dac6ab30 | 1028 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1029 | struct ib_send_wr send_wr, *send_wr_failed; |
1030 | int ret; | |
1031 | ||
1032 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
1033 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1034 | ||
1035 | send_wr.next = NULL; | |
b0a191e7 | 1036 | send_wr.wr_id = (uintptr_t)tx_desc; |
b8d26b3b NB |
1037 | send_wr.sg_list = tx_desc->tx_sg; |
1038 | send_wr.num_sge = tx_desc->num_sge; | |
1039 | send_wr.opcode = IB_WR_SEND; | |
1040 | send_wr.send_flags = IB_SEND_SIGNALED; | |
1041 | ||
dac6ab30 | 1042 | ret = ib_post_send(isert_conn->qp, &send_wr, &send_wr_failed); |
bdf20e72 | 1043 | if (ret) |
24f412dd | 1044 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
1045 | |
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | static void | |
1050 | isert_create_send_desc(struct isert_conn *isert_conn, | |
1051 | struct isert_cmd *isert_cmd, | |
1052 | struct iser_tx_desc *tx_desc) | |
1053 | { | |
dac6ab30 | 1054 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1055 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1056 | |
1057 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
1058 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1059 | ||
1060 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); | |
1061 | tx_desc->iser_header.flags = ISER_VER; | |
1062 | ||
1063 | tx_desc->num_sge = 1; | |
1064 | tx_desc->isert_cmd = isert_cmd; | |
1065 | ||
34efc7df JG |
1066 | if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) { |
1067 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; | |
24f412dd | 1068 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
1069 | } |
1070 | } | |
1071 | ||
1072 | static int | |
1073 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
1074 | struct iser_tx_desc *tx_desc) | |
1075 | { | |
dac6ab30 | 1076 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1077 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
1078 | u64 dma_addr; |
1079 | ||
1080 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
1081 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1082 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 1083 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
1084 | return -ENOMEM; |
1085 | } | |
1086 | ||
1087 | tx_desc->dma_addr = dma_addr; | |
1088 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
1089 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
34efc7df | 1090 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; |
b8d26b3b | 1091 | |
4c22e07f SG |
1092 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
1093 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
1094 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
1095 | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static void | |
95b60f07 | 1100 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 1101 | struct ib_send_wr *send_wr) |
b8d26b3b | 1102 | { |
95b60f07 NB |
1103 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
1104 | ||
b8d26b3b | 1105 | isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; |
b0a191e7 | 1106 | send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; |
b8d26b3b | 1107 | send_wr->opcode = IB_WR_SEND; |
95b60f07 | 1108 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 1109 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 1110 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
1111 | } |
1112 | ||
1113 | static int | |
1114 | isert_rdma_post_recvl(struct isert_conn *isert_conn) | |
1115 | { | |
1116 | struct ib_recv_wr rx_wr, *rx_wr_fail; | |
1117 | struct ib_sge sge; | |
1118 | int ret; | |
1119 | ||
1120 | memset(&sge, 0, sizeof(struct ib_sge)); | |
1121 | sge.addr = isert_conn->login_req_dma; | |
1122 | sge.length = ISER_RX_LOGIN_SIZE; | |
34efc7df | 1123 | sge.lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b | 1124 | |
24f412dd | 1125 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
1126 | sge.addr, sge.length, sge.lkey); |
1127 | ||
1128 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); | |
b0a191e7 | 1129 | rx_wr.wr_id = (uintptr_t)isert_conn->login_req_buf; |
b8d26b3b NB |
1130 | rx_wr.sg_list = &sge; |
1131 | rx_wr.num_sge = 1; | |
1132 | ||
1133 | isert_conn->post_recv_buf_count++; | |
dac6ab30 | 1134 | ret = ib_post_recv(isert_conn->qp, &rx_wr, &rx_wr_fail); |
b8d26b3b | 1135 | if (ret) { |
24f412dd | 1136 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b NB |
1137 | isert_conn->post_recv_buf_count--; |
1138 | } | |
1139 | ||
b8d26b3b NB |
1140 | return ret; |
1141 | } | |
1142 | ||
1143 | static int | |
1144 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1145 | u32 length) | |
1146 | { | |
1147 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 1148 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1149 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 1150 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
1151 | int ret; |
1152 | ||
1153 | isert_create_send_desc(isert_conn, NULL, tx_desc); | |
1154 | ||
1155 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
1156 | sizeof(struct iscsi_hdr)); | |
1157 | ||
1158 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
1159 | ||
1160 | if (length > 0) { | |
1161 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
1162 | ||
1163 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
1164 | length, DMA_TO_DEVICE); | |
1165 | ||
1166 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
1167 | ||
1168 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
1169 | length, DMA_TO_DEVICE); | |
1170 | ||
1171 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
1172 | tx_dsg->length = length; | |
34efc7df | 1173 | tx_dsg->lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b NB |
1174 | tx_desc->num_sge = 2; |
1175 | } | |
1176 | if (!login->login_failed) { | |
1177 | if (login->login_complete) { | |
e0546fc1 | 1178 | if (!conn->sess->sess_ops->SessionType && |
dac6ab30 | 1179 | isert_conn->device->use_fastreg) { |
570db170 | 1180 | ret = isert_conn_create_fastreg_pool(isert_conn); |
f46d6a8a | 1181 | if (ret) { |
24f412dd | 1182 | isert_err("Conn: %p failed to create" |
f46d6a8a NB |
1183 | " fastreg pool\n", isert_conn); |
1184 | return ret; | |
1185 | } | |
1186 | } | |
1187 | ||
b8d26b3b NB |
1188 | ret = isert_alloc_rx_descriptors(isert_conn); |
1189 | if (ret) | |
1190 | return ret; | |
1191 | ||
4366b19c JD |
1192 | ret = isert_post_recvm(isert_conn, |
1193 | ISERT_QP_MAX_RECV_DTOS); | |
b8d26b3b NB |
1194 | if (ret) |
1195 | return ret; | |
1196 | ||
128e9cc8 | 1197 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 1198 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 1199 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 1200 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
1201 | goto post_send; |
1202 | } | |
1203 | ||
1204 | ret = isert_rdma_post_recvl(isert_conn); | |
1205 | if (ret) | |
1206 | return ret; | |
1207 | } | |
1208 | post_send: | |
1209 | ret = isert_post_send(isert_conn, tx_desc); | |
1210 | if (ret) | |
1211 | return ret; | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | static void | |
2371e5da | 1217 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 1218 | { |
2371e5da SG |
1219 | struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf; |
1220 | int rx_buflen = isert_conn->login_req_len; | |
b8d26b3b NB |
1221 | struct iscsi_conn *conn = isert_conn->conn; |
1222 | struct iscsi_login *login = conn->conn_login; | |
1223 | int size; | |
1224 | ||
24f412dd | 1225 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
1226 | |
1227 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
1228 | |
1229 | if (login->first_request) { | |
1230 | struct iscsi_login_req *login_req = | |
1231 | (struct iscsi_login_req *)&rx_desc->iscsi_header; | |
1232 | /* | |
1233 | * Setup the initial iscsi_login values from the leading | |
1234 | * login request PDU. | |
1235 | */ | |
1236 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
1237 | login->current_stage = | |
1238 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
1239 | >> 2; | |
1240 | login->version_min = login_req->min_version; | |
1241 | login->version_max = login_req->max_version; | |
1242 | memcpy(login->isid, login_req->isid, 6); | |
1243 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1244 | login->init_task_tag = login_req->itt; | |
1245 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1246 | login->cid = be16_to_cpu(login_req->cid); | |
1247 | login->tsih = be16_to_cpu(login_req->tsih); | |
1248 | } | |
1249 | ||
1250 | memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); | |
1251 | ||
1252 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1253 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1254 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1255 | MAX_KEY_VALUE_PAIRS); | |
b8d26b3b NB |
1256 | memcpy(login->req_buf, &rx_desc->data[0], size); |
1257 | ||
6faaa85f | 1258 | if (login->first_request) { |
dac6ab30 | 1259 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1260 | return; |
1261 | } | |
1262 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1263 | } |
1264 | ||
b8d26b3b | 1265 | static struct iscsi_cmd |
4366b19c | 1266 | *isert_allocate_cmd(struct iscsi_conn *conn, struct iser_rx_desc *rx_desc) |
b8d26b3b | 1267 | { |
6700425e | 1268 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1269 | struct isert_cmd *isert_cmd; |
d703ce2f | 1270 | struct iscsi_cmd *cmd; |
b8d26b3b | 1271 | |
676687c6 | 1272 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1273 | if (!cmd) { |
24f412dd | 1274 | isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); |
b8d26b3b NB |
1275 | return NULL; |
1276 | } | |
d703ce2f | 1277 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1278 | isert_cmd->conn = isert_conn; |
d703ce2f | 1279 | isert_cmd->iscsi_cmd = cmd; |
4366b19c | 1280 | isert_cmd->rx_desc = rx_desc; |
b8d26b3b | 1281 | |
d703ce2f | 1282 | return cmd; |
b8d26b3b NB |
1283 | } |
1284 | ||
1285 | static int | |
1286 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1287 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1288 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1289 | { |
b8d26b3b NB |
1290 | struct iscsi_conn *conn = isert_conn->conn; |
1291 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
b8d26b3b NB |
1292 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; |
1293 | bool dump_payload = false; | |
9fd60088 | 1294 | unsigned int data_len; |
b8d26b3b NB |
1295 | |
1296 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1297 | if (rc < 0) | |
1298 | return rc; | |
1299 | ||
1300 | imm_data = cmd->immediate_data; | |
1301 | imm_data_len = cmd->first_burst_len; | |
1302 | unsol_data = cmd->unsolicited_data; | |
9fd60088 | 1303 | data_len = cmd->se_cmd.data_length; |
b8d26b3b | 1304 | |
9fd60088 JD |
1305 | if (imm_data && imm_data_len == data_len) |
1306 | cmd->se_cmd.se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
b8d26b3b NB |
1307 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); |
1308 | if (rc < 0) { | |
1309 | return 0; | |
1310 | } else if (rc > 0) { | |
1311 | dump_payload = true; | |
1312 | goto sequence_cmd; | |
1313 | } | |
1314 | ||
1315 | if (!imm_data) | |
1316 | return 0; | |
1317 | ||
9fd60088 JD |
1318 | if (imm_data_len != data_len) { |
1319 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1320 | sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents, | |
1321 | &rx_desc->data[0], imm_data_len); | |
1322 | isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n", | |
1323 | sg_nents, imm_data_len); | |
1324 | } else { | |
1325 | sg_init_table(&isert_cmd->sg, 1); | |
1326 | cmd->se_cmd.t_data_sg = &isert_cmd->sg; | |
1327 | cmd->se_cmd.t_data_nents = 1; | |
1328 | sg_set_buf(&isert_cmd->sg, &rx_desc->data[0], imm_data_len); | |
1329 | isert_dbg("Transfer Immediate imm_data_len: %d\n", | |
1330 | imm_data_len); | |
1331 | } | |
b8d26b3b NB |
1332 | |
1333 | cmd->write_data_done += imm_data_len; | |
1334 | ||
1335 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1336 | spin_lock_bh(&cmd->istate_lock); | |
1337 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1338 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1339 | spin_unlock_bh(&cmd->istate_lock); | |
1340 | } | |
1341 | ||
1342 | sequence_cmd: | |
561bf158 | 1343 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b NB |
1344 | |
1345 | if (!rc && dump_payload == false && unsol_data) | |
1346 | iscsit_set_unsoliticed_dataout(cmd); | |
6cc44a6f | 1347 | else if (dump_payload && imm_data) |
afc16604 | 1348 | target_put_sess_cmd(&cmd->se_cmd); |
b8d26b3b | 1349 | |
b8d26b3b NB |
1350 | return 0; |
1351 | } | |
1352 | ||
1353 | static int | |
1354 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1355 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1356 | { | |
1357 | struct scatterlist *sg_start; | |
1358 | struct iscsi_conn *conn = isert_conn->conn; | |
1359 | struct iscsi_cmd *cmd = NULL; | |
1360 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1361 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1362 | int rc, sg_nents, sg_off, page_off; | |
1363 | ||
1364 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1365 | if (rc < 0) | |
1366 | return rc; | |
1367 | else if (!cmd) | |
1368 | return 0; | |
1369 | /* | |
1370 | * FIXME: Unexpected unsolicited_data out | |
1371 | */ | |
1372 | if (!cmd->unsolicited_data) { | |
24f412dd | 1373 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1374 | dump_stack(); |
1375 | return -1; | |
1376 | } | |
1377 | ||
4c22e07f SG |
1378 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1379 | "write_data_done: %u, data_length: %u\n", | |
1380 | unsol_data_len, cmd->write_data_done, | |
1381 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1382 | |
1383 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1384 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1385 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1386 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1387 | /* | |
1388 | * FIXME: Non page-aligned unsolicited_data out | |
1389 | */ | |
1390 | if (page_off) { | |
4c22e07f | 1391 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1392 | dump_stack(); |
1393 | return -1; | |
1394 | } | |
4c22e07f SG |
1395 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1396 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
1397 | sg_nents, &rx_desc->data[0], unsol_data_len); | |
b8d26b3b NB |
1398 | |
1399 | sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], | |
1400 | unsol_data_len); | |
1401 | ||
1402 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1403 | if (rc < 0) | |
1404 | return rc; | |
1405 | ||
4366b19c JD |
1406 | /* |
1407 | * multiple data-outs on the same command can arrive - | |
1408 | * so post the buffer before hand | |
1409 | */ | |
1410 | rc = isert_post_recv(isert_conn, rx_desc); | |
1411 | if (rc) { | |
1412 | isert_err("ib_post_recv failed with %d\n", rc); | |
1413 | return rc; | |
1414 | } | |
b8d26b3b NB |
1415 | return 0; |
1416 | } | |
1417 | ||
778de368 NB |
1418 | static int |
1419 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1420 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1421 | unsigned char *buf) | |
778de368 | 1422 | { |
778de368 NB |
1423 | struct iscsi_conn *conn = isert_conn->conn; |
1424 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1425 | int rc; | |
1426 | ||
1427 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1428 | if (rc < 0) | |
1429 | return rc; | |
1430 | /* | |
1431 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1432 | */ | |
1433 | ||
1434 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1435 | } | |
1436 | ||
adb54c29 NB |
1437 | static int |
1438 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1439 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1440 | struct iscsi_text *hdr) | |
adb54c29 | 1441 | { |
adb54c29 NB |
1442 | struct iscsi_conn *conn = isert_conn->conn; |
1443 | u32 payload_length = ntoh24(hdr->dlength); | |
1444 | int rc; | |
b44a2b67 | 1445 | unsigned char *text_in = NULL; |
adb54c29 NB |
1446 | |
1447 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1448 | if (rc < 0) | |
1449 | return rc; | |
1450 | ||
b44a2b67 SG |
1451 | if (payload_length) { |
1452 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
1453 | if (!text_in) { | |
1454 | isert_err("Unable to allocate text_in of payload_length: %u\n", | |
1455 | payload_length); | |
1456 | return -ENOMEM; | |
1457 | } | |
adb54c29 NB |
1458 | } |
1459 | cmd->text_in_ptr = text_in; | |
1460 | ||
1461 | memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); | |
1462 | ||
1463 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1464 | } | |
1465 | ||
b8d26b3b NB |
1466 | static int |
1467 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1468 | uint32_t read_stag, uint64_t read_va, | |
1469 | uint32_t write_stag, uint64_t write_va) | |
1470 | { | |
1471 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
1472 | struct iscsi_conn *conn = isert_conn->conn; | |
1473 | struct iscsi_cmd *cmd; | |
1474 | struct isert_cmd *isert_cmd; | |
1475 | int ret = -EINVAL; | |
1476 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1477 | ||
fb140271 | 1478 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1479 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1480 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1481 | " ignoring\n", opcode); |
ca40d24e NB |
1482 | return 0; |
1483 | } | |
1484 | ||
b8d26b3b NB |
1485 | switch (opcode) { |
1486 | case ISCSI_OP_SCSI_CMD: | |
4366b19c | 1487 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1488 | if (!cmd) |
1489 | break; | |
1490 | ||
d703ce2f | 1491 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1492 | isert_cmd->read_stag = read_stag; |
1493 | isert_cmd->read_va = read_va; | |
1494 | isert_cmd->write_stag = write_stag; | |
1495 | isert_cmd->write_va = write_va; | |
1496 | ||
d703ce2f | 1497 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1498 | rx_desc, (unsigned char *)hdr); |
1499 | break; | |
1500 | case ISCSI_OP_NOOP_OUT: | |
4366b19c | 1501 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1502 | if (!cmd) |
1503 | break; | |
1504 | ||
d703ce2f NB |
1505 | isert_cmd = iscsit_priv_cmd(cmd); |
1506 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1507 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1508 | break; |
1509 | case ISCSI_OP_SCSI_DATA_OUT: | |
1510 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1511 | (unsigned char *)hdr); | |
1512 | break; | |
1513 | case ISCSI_OP_SCSI_TMFUNC: | |
4366b19c | 1514 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1515 | if (!cmd) |
1516 | break; | |
1517 | ||
1518 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1519 | (unsigned char *)hdr); | |
1520 | break; | |
1521 | case ISCSI_OP_LOGOUT: | |
4366b19c | 1522 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1523 | if (!cmd) |
1524 | break; | |
1525 | ||
1526 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1527 | break; |
adb54c29 | 1528 | case ISCSI_OP_TEXT: |
4366b19c | 1529 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) |
e4f4e801 | 1530 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); |
4366b19c JD |
1531 | else |
1532 | cmd = isert_allocate_cmd(conn, rx_desc); | |
1533 | ||
1534 | if (!cmd) | |
1535 | break; | |
adb54c29 | 1536 | |
d703ce2f NB |
1537 | isert_cmd = iscsit_priv_cmd(cmd); |
1538 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1539 | rx_desc, (struct iscsi_text *)hdr); |
1540 | break; | |
b8d26b3b | 1541 | default: |
24f412dd | 1542 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1543 | dump_stack(); |
1544 | break; | |
1545 | } | |
1546 | ||
1547 | return ret; | |
1548 | } | |
1549 | ||
1550 | static void | |
1551 | isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) | |
1552 | { | |
1553 | struct iser_hdr *iser_hdr = &rx_desc->iser_header; | |
1554 | uint64_t read_va = 0, write_va = 0; | |
1555 | uint32_t read_stag = 0, write_stag = 0; | |
b8d26b3b NB |
1556 | |
1557 | switch (iser_hdr->flags & 0xF0) { | |
1558 | case ISCSI_CTRL: | |
1559 | if (iser_hdr->flags & ISER_RSV) { | |
1560 | read_stag = be32_to_cpu(iser_hdr->read_stag); | |
1561 | read_va = be64_to_cpu(iser_hdr->read_va); | |
4c22e07f SG |
1562 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1563 | read_stag, (unsigned long long)read_va); | |
b8d26b3b NB |
1564 | } |
1565 | if (iser_hdr->flags & ISER_WSV) { | |
1566 | write_stag = be32_to_cpu(iser_hdr->write_stag); | |
1567 | write_va = be64_to_cpu(iser_hdr->write_va); | |
4c22e07f SG |
1568 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1569 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1570 | } |
1571 | ||
24f412dd | 1572 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1573 | break; |
1574 | case ISER_HELLO: | |
24f412dd | 1575 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1576 | break; |
1577 | default: | |
24f412dd | 1578 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags); |
b8d26b3b NB |
1579 | break; |
1580 | } | |
1581 | ||
6c760b3d BVA |
1582 | isert_rx_opcode(isert_conn, rx_desc, |
1583 | read_stag, read_va, write_stag, write_va); | |
b8d26b3b NB |
1584 | } |
1585 | ||
1586 | static void | |
7748681b SG |
1587 | isert_rcv_completion(struct iser_rx_desc *desc, |
1588 | struct isert_conn *isert_conn, | |
1589 | u32 xfer_len) | |
b8d26b3b | 1590 | { |
dac6ab30 | 1591 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
1592 | struct iscsi_hdr *hdr; |
1593 | u64 rx_dma; | |
4366b19c | 1594 | int rx_buflen; |
b8d26b3b NB |
1595 | |
1596 | if ((char *)desc == isert_conn->login_req_buf) { | |
1597 | rx_dma = isert_conn->login_req_dma; | |
1598 | rx_buflen = ISER_RX_LOGIN_SIZE; | |
4c22e07f | 1599 | isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1600 | rx_dma, rx_buflen); |
1601 | } else { | |
1602 | rx_dma = desc->dma_addr; | |
1603 | rx_buflen = ISER_RX_PAYLOAD_SIZE; | |
4c22e07f | 1604 | isert_dbg("req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", |
b8d26b3b NB |
1605 | rx_dma, rx_buflen); |
1606 | } | |
1607 | ||
1608 | ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); | |
1609 | ||
1610 | hdr = &desc->iscsi_header; | |
24f412dd | 1611 | isert_dbg("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", |
b8d26b3b NB |
1612 | hdr->opcode, hdr->itt, hdr->flags, |
1613 | (int)(xfer_len - ISER_HEADERS_LEN)); | |
1614 | ||
2371e5da SG |
1615 | if ((char *)desc == isert_conn->login_req_buf) { |
1616 | isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN; | |
1617 | if (isert_conn->conn) { | |
1618 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
1619 | ||
1620 | if (login && !login->first_request) | |
1621 | isert_rx_login_req(isert_conn); | |
1622 | } | |
dac6ab30 | 1623 | mutex_lock(&isert_conn->mutex); |
2371e5da | 1624 | complete(&isert_conn->login_req_comp); |
dac6ab30 | 1625 | mutex_unlock(&isert_conn->mutex); |
2371e5da | 1626 | } else { |
b8d26b3b | 1627 | isert_rx_do_work(desc, isert_conn); |
2371e5da | 1628 | } |
b8d26b3b NB |
1629 | |
1630 | ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, | |
1631 | DMA_FROM_DEVICE); | |
1632 | ||
1633 | isert_conn->post_recv_buf_count--; | |
b8d26b3b NB |
1634 | } |
1635 | ||
e3d7e4c3 SG |
1636 | static int |
1637 | isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
1638 | struct scatterlist *sg, u32 nents, u32 length, u32 offset, | |
1639 | enum iser_ib_op_code op, struct isert_data_buf *data) | |
1640 | { | |
dac6ab30 | 1641 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1642 | |
1643 | data->dma_dir = op == ISER_IB_RDMA_WRITE ? | |
1644 | DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
1645 | ||
1646 | data->len = length - offset; | |
1647 | data->offset = offset; | |
1648 | data->sg_off = data->offset / PAGE_SIZE; | |
1649 | ||
1650 | data->sg = &sg[data->sg_off]; | |
1651 | data->nents = min_t(unsigned int, nents - data->sg_off, | |
1652 | ISCSI_ISER_SG_TABLESIZE); | |
1653 | data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * | |
1654 | PAGE_SIZE); | |
1655 | ||
1656 | data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, | |
1657 | data->dma_dir); | |
1658 | if (unlikely(!data->dma_nents)) { | |
24f412dd | 1659 | isert_err("Cmd: unable to dma map SGs %p\n", sg); |
e3d7e4c3 SG |
1660 | return -EINVAL; |
1661 | } | |
1662 | ||
24f412dd | 1663 | isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", |
4c22e07f | 1664 | isert_cmd, data->dma_nents, data->sg, data->nents, data->len); |
e3d7e4c3 SG |
1665 | |
1666 | return 0; | |
1667 | } | |
1668 | ||
1669 | static void | |
1670 | isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) | |
1671 | { | |
dac6ab30 | 1672 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e3d7e4c3 SG |
1673 | |
1674 | ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); | |
1675 | memset(data, 0, sizeof(*data)); | |
1676 | } | |
1677 | ||
1678 | ||
1679 | ||
b8d26b3b NB |
1680 | static void |
1681 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) | |
1682 | { | |
1683 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
b8d26b3b | 1684 | |
4c22e07f | 1685 | isert_dbg("Cmd %p\n", isert_cmd); |
e3d7e4c3 SG |
1686 | |
1687 | if (wr->data.sg) { | |
4c22e07f | 1688 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1689 | isert_unmap_data_buf(isert_conn, &wr->data); |
b8d26b3b NB |
1690 | } |
1691 | ||
e622f2f4 | 1692 | if (wr->rdma_wr) { |
4c22e07f | 1693 | isert_dbg("Cmd %p free send_wr\n", isert_cmd); |
e622f2f4 CH |
1694 | kfree(wr->rdma_wr); |
1695 | wr->rdma_wr = NULL; | |
90ecc6e2 | 1696 | } |
b8d26b3b | 1697 | |
90ecc6e2 | 1698 | if (wr->ib_sge) { |
4c22e07f | 1699 | isert_dbg("Cmd %p free ib_sge\n", isert_cmd); |
90ecc6e2 VP |
1700 | kfree(wr->ib_sge); |
1701 | wr->ib_sge = NULL; | |
1702 | } | |
b8d26b3b NB |
1703 | } |
1704 | ||
59464ef4 | 1705 | static void |
a3a5a826 | 1706 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) |
59464ef4 VP |
1707 | { |
1708 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
59464ef4 | 1709 | |
4c22e07f | 1710 | isert_dbg("Cmd %p\n", isert_cmd); |
59464ef4 VP |
1711 | |
1712 | if (wr->fr_desc) { | |
4c22e07f | 1713 | isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd, wr->fr_desc); |
9e961ae7 SG |
1714 | if (wr->fr_desc->ind & ISERT_PROTECTED) { |
1715 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
1716 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
1717 | } | |
dac6ab30 SG |
1718 | spin_lock_bh(&isert_conn->pool_lock); |
1719 | list_add_tail(&wr->fr_desc->list, &isert_conn->fr_pool); | |
1720 | spin_unlock_bh(&isert_conn->pool_lock); | |
59464ef4 VP |
1721 | wr->fr_desc = NULL; |
1722 | } | |
1723 | ||
e3d7e4c3 | 1724 | if (wr->data.sg) { |
4c22e07f | 1725 | isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); |
e3d7e4c3 | 1726 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 VP |
1727 | } |
1728 | ||
1729 | wr->ib_sge = NULL; | |
e622f2f4 | 1730 | wr->rdma_wr = NULL; |
59464ef4 VP |
1731 | } |
1732 | ||
b8d26b3b | 1733 | static void |
03e7848a | 1734 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1735 | { |
d703ce2f | 1736 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1737 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1738 | struct iscsi_conn *conn = isert_conn->conn; |
dac6ab30 | 1739 | struct isert_device *device = isert_conn->device; |
e4f4e801 | 1740 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1741 | |
4c22e07f | 1742 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1743 | |
1744 | switch (cmd->iscsi_opcode) { | |
1745 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1746 | spin_lock_bh(&conn->cmd_lock); |
1747 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1748 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1749 | spin_unlock_bh(&conn->cmd_lock); |
1750 | ||
03e7848a | 1751 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1752 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1753 | /* |
1754 | * Check for special case during comp_err where | |
1755 | * WRITE_PENDING has been handed off from core, | |
1756 | * but requires an extra target_put_sess_cmd() | |
1757 | * before transport_generic_free_cmd() below. | |
1758 | */ | |
1759 | if (comp_err && | |
1760 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1761 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1762 | ||
afc16604 | 1763 | target_put_sess_cmd(se_cmd); |
03e7848a NB |
1764 | } |
1765 | } | |
b8d26b3b | 1766 | |
d40945d8 | 1767 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
186a9647 NB |
1768 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1769 | break; | |
b8d26b3b | 1770 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1771 | spin_lock_bh(&conn->cmd_lock); |
1772 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1773 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1774 | spin_unlock_bh(&conn->cmd_lock); |
1775 | ||
b8d26b3b NB |
1776 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1777 | break; | |
1778 | case ISCSI_OP_REJECT: | |
1779 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1780 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1781 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1782 | /* If the continue bit is on, keep the command alive */ | |
1783 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1784 | break; | |
1785 | ||
b8d26b3b NB |
1786 | spin_lock_bh(&conn->cmd_lock); |
1787 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1788 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1789 | spin_unlock_bh(&conn->cmd_lock); |
1790 | ||
1791 | /* | |
1792 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1793 | * overwritten the original iscsi_opcode assignment, and the | |
1794 | * associated cmd->se_cmd needs to be released. | |
1795 | */ | |
1796 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1797 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1798 | cmd->iscsi_opcode); |
b8d26b3b NB |
1799 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1800 | break; | |
1801 | } | |
1802 | /* | |
1803 | * Fall-through | |
1804 | */ | |
1805 | default: | |
d703ce2f | 1806 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1807 | break; |
1808 | } | |
1809 | } | |
1810 | ||
1811 | static void | |
1812 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1813 | { | |
1814 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1815 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1816 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1817 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1818 | tx_desc->dma_addr = 0; | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | static void | |
1823 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1824 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1825 | { |
dbbc5d11 | 1826 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1827 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1828 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1829 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1830 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1831 | } |
1832 | ||
1833 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1834 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1835 | } |
1836 | ||
96b7973e SG |
1837 | static int |
1838 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1839 | { | |
1840 | struct ib_mr_status mr_status; | |
1841 | int ret; | |
1842 | ||
1843 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1844 | if (ret) { | |
24f412dd | 1845 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1846 | goto fail_mr_status; |
1847 | } | |
1848 | ||
1849 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1850 | u64 sec_offset_err; | |
1851 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1852 | ||
1853 | switch (mr_status.sig_err.err_type) { | |
1854 | case IB_SIG_BAD_GUARD: | |
1855 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1856 | break; | |
1857 | case IB_SIG_BAD_REFTAG: | |
1858 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1859 | break; | |
1860 | case IB_SIG_BAD_APPTAG: | |
1861 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1862 | break; | |
1863 | } | |
1864 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1865 | do_div(sec_offset_err, block_size); | |
1866 | se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; | |
1867 | ||
4c22e07f SG |
1868 | isert_err("PI error found type %d at sector 0x%llx " |
1869 | "expected 0x%x vs actual 0x%x\n", | |
1870 | mr_status.sig_err.err_type, | |
1871 | (unsigned long long)se_cmd->bad_sector, | |
1872 | mr_status.sig_err.expected, | |
1873 | mr_status.sig_err.actual); | |
96b7973e SG |
1874 | ret = 1; |
1875 | } | |
1876 | ||
1877 | fail_mr_status: | |
1878 | return ret; | |
1879 | } | |
1880 | ||
f93f3a70 SG |
1881 | static void |
1882 | isert_completion_rdma_write(struct iser_tx_desc *tx_desc, | |
1883 | struct isert_cmd *isert_cmd) | |
1884 | { | |
9e961ae7 | 1885 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
f93f3a70 | 1886 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
9e961ae7 | 1887 | struct se_cmd *se_cmd = &cmd->se_cmd; |
f93f3a70 | 1888 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1889 | struct isert_device *device = isert_conn->device; |
9e961ae7 SG |
1890 | int ret = 0; |
1891 | ||
1892 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { | |
96b7973e SG |
1893 | ret = isert_check_pi_status(se_cmd, |
1894 | wr->fr_desc->pi_ctx->sig_mr); | |
1895 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 | 1896 | } |
f93f3a70 SG |
1897 | |
1898 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
e622f2f4 | 1899 | wr->rdma_wr_num = 0; |
9e961ae7 SG |
1900 | if (ret) |
1901 | transport_send_check_condition_and_sense(se_cmd, | |
1902 | se_cmd->pi_err, 0); | |
1903 | else | |
1904 | isert_put_response(isert_conn->conn, cmd); | |
f93f3a70 SG |
1905 | } |
1906 | ||
b8d26b3b NB |
1907 | static void |
1908 | isert_completion_rdma_read(struct iser_tx_desc *tx_desc, | |
1909 | struct isert_cmd *isert_cmd) | |
1910 | { | |
1911 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
d703ce2f | 1912 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1913 | struct se_cmd *se_cmd = &cmd->se_cmd; |
90ecc6e2 | 1914 | struct isert_conn *isert_conn = isert_cmd->conn; |
dac6ab30 | 1915 | struct isert_device *device = isert_conn->device; |
5bac4b1a | 1916 | int ret = 0; |
b8d26b3b | 1917 | |
9e961ae7 | 1918 | if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { |
96b7973e SG |
1919 | ret = isert_check_pi_status(se_cmd, |
1920 | wr->fr_desc->pi_ctx->sig_mr); | |
1921 | wr->fr_desc->ind &= ~ISERT_PROTECTED; | |
9e961ae7 SG |
1922 | } |
1923 | ||
b8d26b3b | 1924 | iscsit_stop_dataout_timer(cmd); |
d40945d8 | 1925 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
e3d7e4c3 | 1926 | cmd->write_data_done = wr->data.len; |
e622f2f4 | 1927 | wr->rdma_wr_num = 0; |
b8d26b3b | 1928 | |
24f412dd | 1929 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1930 | spin_lock_bh(&cmd->istate_lock); |
1931 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1932 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1933 | spin_unlock_bh(&cmd->istate_lock); | |
1934 | ||
364189f0 | 1935 | if (ret) { |
afc16604 | 1936 | target_put_sess_cmd(se_cmd); |
5bac4b1a SG |
1937 | transport_send_check_condition_and_sense(se_cmd, |
1938 | se_cmd->pi_err, 0); | |
364189f0 | 1939 | } else { |
5bac4b1a | 1940 | target_execute_cmd(se_cmd); |
364189f0 | 1941 | } |
b8d26b3b NB |
1942 | } |
1943 | ||
1944 | static void | |
1945 | isert_do_control_comp(struct work_struct *work) | |
1946 | { | |
1947 | struct isert_cmd *isert_cmd = container_of(work, | |
1948 | struct isert_cmd, comp_work); | |
1949 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1950 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
d703ce2f | 1951 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1952 | |
4c22e07f SG |
1953 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1954 | ||
b8d26b3b NB |
1955 | switch (cmd->i_state) { |
1956 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1957 | iscsit_tmr_post_handler(cmd, cmd->conn); |
10633c37 SG |
1958 | case ISTATE_SEND_REJECT: /* FALLTHRU */ |
1959 | case ISTATE_SEND_TEXTRSP: /* FALLTHRU */ | |
b8d26b3b | 1960 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1961 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1962 | ib_dev, false); | |
3df8f68a | 1963 | break; |
b8d26b3b | 1964 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1965 | iscsit_logout_post_handler(cmd, cmd->conn); |
1966 | break; | |
1967 | default: | |
4c22e07f | 1968 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1969 | dump_stack(); |
1970 | break; | |
1971 | } | |
1972 | } | |
1973 | ||
1974 | static void | |
1975 | isert_response_completion(struct iser_tx_desc *tx_desc, | |
1976 | struct isert_cmd *isert_cmd, | |
1977 | struct isert_conn *isert_conn, | |
1978 | struct ib_device *ib_dev) | |
1979 | { | |
d703ce2f | 1980 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b NB |
1981 | |
1982 | if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || | |
3df8f68a | 1983 | cmd->i_state == ISTATE_SEND_LOGOUTRSP || |
adb54c29 NB |
1984 | cmd->i_state == ISTATE_SEND_REJECT || |
1985 | cmd->i_state == ISTATE_SEND_TEXTRSP) { | |
b8d26b3b NB |
1986 | isert_unmap_tx_desc(tx_desc, ib_dev); |
1987 | ||
1988 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1989 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1990 | return; | |
1991 | } | |
897bb2c9 | 1992 | |
b8d26b3b | 1993 | cmd->i_state = ISTATE_SENT_STATUS; |
03e7848a | 1994 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); |
b8d26b3b NB |
1995 | } |
1996 | ||
1997 | static void | |
7748681b | 1998 | isert_snd_completion(struct iser_tx_desc *tx_desc, |
68a86dee | 1999 | struct isert_conn *isert_conn) |
b8d26b3b | 2000 | { |
dac6ab30 | 2001 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
b8d26b3b NB |
2002 | struct isert_cmd *isert_cmd = tx_desc->isert_cmd; |
2003 | struct isert_rdma_wr *wr; | |
2004 | ||
2005 | if (!isert_cmd) { | |
b8d26b3b NB |
2006 | isert_unmap_tx_desc(tx_desc, ib_dev); |
2007 | return; | |
2008 | } | |
2009 | wr = &isert_cmd->rdma_wr; | |
2010 | ||
4c22e07f SG |
2011 | isert_dbg("Cmd %p iser_ib_op %d\n", isert_cmd, wr->iser_ib_op); |
2012 | ||
b8d26b3b | 2013 | switch (wr->iser_ib_op) { |
b8d26b3b | 2014 | case ISER_IB_SEND: |
b8d26b3b NB |
2015 | isert_response_completion(tx_desc, isert_cmd, |
2016 | isert_conn, ib_dev); | |
2017 | break; | |
2018 | case ISER_IB_RDMA_WRITE: | |
f93f3a70 | 2019 | isert_completion_rdma_write(tx_desc, isert_cmd); |
b8d26b3b NB |
2020 | break; |
2021 | case ISER_IB_RDMA_READ: | |
b8d26b3b NB |
2022 | isert_completion_rdma_read(tx_desc, isert_cmd); |
2023 | break; | |
2024 | default: | |
4c22e07f | 2025 | isert_err("Unknown wr->iser_ib_op: 0x%x\n", wr->iser_ib_op); |
b8d26b3b NB |
2026 | dump_stack(); |
2027 | break; | |
2028 | } | |
2029 | } | |
2030 | ||
6f0fae3d SG |
2031 | /** |
2032 | * is_isert_tx_desc() - Indicate if the completion wr_id | |
2033 | * is a TX descriptor or not. | |
2034 | * @isert_conn: iser connection | |
2035 | * @wr_id: completion WR identifier | |
2036 | * | |
2037 | * Since we cannot rely on wc opcode in FLUSH errors | |
2038 | * we must work around it by checking if the wr_id address | |
2039 | * falls in the iser connection rx_descs buffer. If so | |
2040 | * it is an RX descriptor, otherwize it is a TX. | |
2041 | */ | |
2042 | static inline bool | |
2043 | is_isert_tx_desc(struct isert_conn *isert_conn, void *wr_id) | |
2044 | { | |
dac6ab30 SG |
2045 | void *start = isert_conn->rx_descs; |
2046 | int len = ISERT_QP_MAX_RECV_DTOS * sizeof(*isert_conn->rx_descs); | |
6f0fae3d SG |
2047 | |
2048 | if (wr_id >= start && wr_id < start + len) | |
2049 | return false; | |
2050 | ||
2051 | return true; | |
2052 | } | |
2053 | ||
b8d26b3b | 2054 | static void |
6f0fae3d | 2055 | isert_cq_comp_err(struct isert_conn *isert_conn, struct ib_wc *wc) |
b8d26b3b | 2056 | { |
bdf20e72 | 2057 | if (wc->wr_id == ISER_BEACON_WRID) { |
dac6ab30 | 2058 | isert_info("conn %p completing wait_comp_err\n", |
bdf20e72 | 2059 | isert_conn); |
dac6ab30 | 2060 | complete(&isert_conn->wait_comp_err); |
ed4520ae | 2061 | } else if (is_isert_tx_desc(isert_conn, (void *)(uintptr_t)wc->wr_id)) { |
dac6ab30 | 2062 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
df43debd | 2063 | struct isert_cmd *isert_cmd; |
6f0fae3d | 2064 | struct iser_tx_desc *desc; |
df43debd | 2065 | |
6f0fae3d SG |
2066 | desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
2067 | isert_cmd = desc->isert_cmd; | |
df43debd SG |
2068 | if (!isert_cmd) |
2069 | isert_unmap_tx_desc(desc, ib_dev); | |
2070 | else | |
2071 | isert_completion_put(desc, isert_cmd, ib_dev, true); | |
df43debd SG |
2072 | } else { |
2073 | isert_conn->post_recv_buf_count--; | |
bdf20e72 SG |
2074 | if (!isert_conn->post_recv_buf_count) |
2075 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
df43debd | 2076 | } |
b8d26b3b NB |
2077 | } |
2078 | ||
2079 | static void | |
6f0fae3d | 2080 | isert_handle_wc(struct ib_wc *wc) |
b8d26b3b | 2081 | { |
b8d26b3b NB |
2082 | struct isert_conn *isert_conn; |
2083 | struct iser_tx_desc *tx_desc; | |
6f0fae3d | 2084 | struct iser_rx_desc *rx_desc; |
b8d26b3b | 2085 | |
6f0fae3d SG |
2086 | isert_conn = wc->qp->qp_context; |
2087 | if (likely(wc->status == IB_WC_SUCCESS)) { | |
2088 | if (wc->opcode == IB_WC_RECV) { | |
2089 | rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id; | |
7748681b | 2090 | isert_rcv_completion(rx_desc, isert_conn, wc->byte_len); |
b8d26b3b | 2091 | } else { |
6f0fae3d | 2092 | tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; |
7748681b | 2093 | isert_snd_completion(tx_desc, isert_conn); |
b8d26b3b | 2094 | } |
6f0fae3d SG |
2095 | } else { |
2096 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
ea8a1616 SG |
2097 | isert_err("%s (%d): wr id %llx vend_err %x\n", |
2098 | ib_wc_status_msg(wc->status), wc->status, | |
2099 | wc->wr_id, wc->vendor_err); | |
6f0fae3d | 2100 | else |
ea8a1616 SG |
2101 | isert_dbg("%s (%d): wr id %llx\n", |
2102 | ib_wc_status_msg(wc->status), wc->status, | |
2103 | wc->wr_id); | |
b8d26b3b | 2104 | |
6f0fae3d SG |
2105 | if (wc->wr_id != ISER_FASTREG_LI_WRID) |
2106 | isert_cq_comp_err(isert_conn, wc); | |
2107 | } | |
b8d26b3b NB |
2108 | } |
2109 | ||
2110 | static void | |
6f0fae3d | 2111 | isert_cq_work(struct work_struct *work) |
b8d26b3b | 2112 | { |
37d9fe80 | 2113 | enum { isert_poll_budget = 65536 }; |
4a295bae | 2114 | struct isert_comp *comp = container_of(work, struct isert_comp, |
6f0fae3d | 2115 | work); |
36ea63b5 SG |
2116 | struct ib_wc *const wcs = comp->wcs; |
2117 | int i, n, completed = 0; | |
b8d26b3b | 2118 | |
36ea63b5 SG |
2119 | while ((n = ib_poll_cq(comp->cq, ARRAY_SIZE(comp->wcs), wcs)) > 0) { |
2120 | for (i = 0; i < n; i++) | |
2121 | isert_handle_wc(&wcs[i]); | |
b8d26b3b | 2122 | |
36ea63b5 SG |
2123 | completed += n; |
2124 | if (completed >= isert_poll_budget) | |
37d9fe80 SG |
2125 | break; |
2126 | } | |
2127 | ||
6f0fae3d | 2128 | ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); |
b8d26b3b NB |
2129 | } |
2130 | ||
2131 | static void | |
6f0fae3d | 2132 | isert_cq_callback(struct ib_cq *cq, void *context) |
b8d26b3b | 2133 | { |
4a295bae | 2134 | struct isert_comp *comp = context; |
b8d26b3b | 2135 | |
6f0fae3d | 2136 | queue_work(isert_comp_wq, &comp->work); |
b8d26b3b NB |
2137 | } |
2138 | ||
2139 | static int | |
2140 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
2141 | { | |
2142 | struct ib_send_wr *wr_failed; | |
2143 | int ret; | |
2144 | ||
4366b19c JD |
2145 | ret = isert_post_recv(isert_conn, isert_cmd->rx_desc); |
2146 | if (ret) { | |
2147 | isert_err("ib_post_recv failed with %d\n", ret); | |
2148 | return ret; | |
2149 | } | |
2150 | ||
dac6ab30 | 2151 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, |
b8d26b3b NB |
2152 | &wr_failed); |
2153 | if (ret) { | |
24f412dd | 2154 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
2155 | return ret; |
2156 | } | |
2157 | return ret; | |
2158 | } | |
2159 | ||
2160 | static int | |
2161 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2162 | { | |
d703ce2f | 2163 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2164 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2165 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2166 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
2167 | &isert_cmd->tx_desc.iscsi_header; | |
2168 | ||
2169 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2170 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
2171 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2172 | /* | |
2173 | * Attach SENSE DATA payload to iSCSI Response PDU | |
2174 | */ | |
2175 | if (cmd->se_cmd.sense_buffer && | |
2176 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
2177 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 2178 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2179 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 2180 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 2181 | u32 padding, pdu_len; |
b8d26b3b NB |
2182 | |
2183 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
2184 | cmd->sense_buffer); | |
2185 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
2186 | ||
2187 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
2188 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 2189 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 2190 | |
dbbc5d11 NB |
2191 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
2192 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b NB |
2193 | DMA_TO_DEVICE); |
2194 | ||
dbbc5d11 NB |
2195 | isert_cmd->pdu_buf_len = pdu_len; |
2196 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2197 | tx_dsg->length = pdu_len; | |
34efc7df | 2198 | tx_dsg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
2199 | isert_cmd->tx_desc.num_sge = 2; |
2200 | } | |
2201 | ||
68a86dee | 2202 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2203 | |
4c22e07f | 2204 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
2205 | |
2206 | return isert_post_response(isert_conn, isert_cmd); | |
2207 | } | |
2208 | ||
131e6abc NB |
2209 | static void |
2210 | isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2211 | { | |
2212 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 2213 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2214 | struct isert_device *device = isert_conn->device; |
131e6abc NB |
2215 | |
2216 | spin_lock_bh(&conn->cmd_lock); | |
2217 | if (!list_empty(&cmd->i_conn_node)) | |
2218 | list_del_init(&cmd->i_conn_node); | |
2219 | spin_unlock_bh(&conn->cmd_lock); | |
2220 | ||
2221 | if (cmd->data_direction == DMA_TO_DEVICE) | |
2222 | iscsit_stop_dataout_timer(cmd); | |
2223 | ||
2224 | device->unreg_rdma_mem(isert_cmd, isert_conn); | |
2225 | } | |
2226 | ||
e70beee7 NB |
2227 | static enum target_prot_op |
2228 | isert_get_sup_prot_ops(struct iscsi_conn *conn) | |
2229 | { | |
6700425e | 2230 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2231 | struct isert_device *device = isert_conn->device; |
e70beee7 | 2232 | |
23a548ee SG |
2233 | if (conn->tpg->tpg_attrib.t10_pi) { |
2234 | if (device->pi_capable) { | |
24f412dd | 2235 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
2236 | isert_conn->pi_support = true; |
2237 | return TARGET_PROT_ALL; | |
2238 | } | |
2239 | } | |
2240 | ||
24f412dd | 2241 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 2242 | isert_conn->pi_support = false; |
e70beee7 NB |
2243 | |
2244 | return TARGET_PROT_NORMAL; | |
2245 | } | |
2246 | ||
b8d26b3b NB |
2247 | static int |
2248 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2249 | bool nopout_response) | |
2250 | { | |
d703ce2f | 2251 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2252 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2253 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2254 | ||
2255 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2256 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
2257 | &isert_cmd->tx_desc.iscsi_header, | |
2258 | nopout_response); | |
2259 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2260 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2261 | |
4c22e07f | 2262 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
2263 | |
2264 | return isert_post_response(isert_conn, isert_cmd); | |
2265 | } | |
2266 | ||
2267 | static int | |
2268 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2269 | { | |
d703ce2f | 2270 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2271 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2272 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2273 | ||
2274 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2275 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
2276 | &isert_cmd->tx_desc.iscsi_header); | |
2277 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2278 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2279 | |
4c22e07f | 2280 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
2281 | |
2282 | return isert_post_response(isert_conn, isert_cmd); | |
2283 | } | |
2284 | ||
2285 | static int | |
2286 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2287 | { | |
d703ce2f | 2288 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2289 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2290 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2291 | ||
2292 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2293 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
2294 | &isert_cmd->tx_desc.iscsi_header); | |
2295 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 2296 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2297 | |
4c22e07f | 2298 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
2299 | |
2300 | return isert_post_response(isert_conn, isert_cmd); | |
2301 | } | |
2302 | ||
2303 | static int | |
2304 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2305 | { | |
d703ce2f | 2306 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2307 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 2308 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 2309 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2310 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
2311 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2312 | struct iscsi_reject *hdr = | |
2313 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
2314 | |
2315 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 2316 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 2317 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
2318 | |
2319 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 2320 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
2321 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
2322 | DMA_TO_DEVICE); | |
dbbc5d11 NB |
2323 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
2324 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 2325 | tx_dsg->length = ISCSI_HDR_LEN; |
34efc7df | 2326 | tx_dsg->lkey = device->pd->local_dma_lkey; |
3df8f68a NB |
2327 | isert_cmd->tx_desc.num_sge = 2; |
2328 | ||
68a86dee | 2329 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 2330 | |
4c22e07f | 2331 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
2332 | |
2333 | return isert_post_response(isert_conn, isert_cmd); | |
2334 | } | |
2335 | ||
adb54c29 NB |
2336 | static int |
2337 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2338 | { | |
d703ce2f | 2339 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2340 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
2341 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
2342 | struct iscsi_text_rsp *hdr = | |
2343 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
2344 | u32 txt_rsp_len; | |
2345 | int rc; | |
2346 | ||
2347 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 2348 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
2349 | if (rc < 0) |
2350 | return rc; | |
2351 | ||
2352 | txt_rsp_len = rc; | |
2353 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2354 | ||
2355 | if (txt_rsp_len) { | |
dac6ab30 | 2356 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2357 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
2358 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
2359 | void *txt_rsp_buf = cmd->buf_ptr; | |
2360 | ||
2361 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
2362 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
2363 | ||
2364 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
2365 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2366 | tx_dsg->length = txt_rsp_len; | |
34efc7df | 2367 | tx_dsg->lkey = device->pd->local_dma_lkey; |
adb54c29 NB |
2368 | isert_cmd->tx_desc.num_sge = 2; |
2369 | } | |
68a86dee | 2370 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 2371 | |
f64d2792 | 2372 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
2373 | |
2374 | return isert_post_response(isert_conn, isert_cmd); | |
2375 | } | |
2376 | ||
b8d26b3b NB |
2377 | static int |
2378 | isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
e622f2f4 | 2379 | struct ib_sge *ib_sge, struct ib_rdma_wr *rdma_wr, |
b8d26b3b NB |
2380 | u32 data_left, u32 offset) |
2381 | { | |
d703ce2f | 2382 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 2383 | struct scatterlist *sg_start, *tmp_sg; |
dac6ab30 | 2384 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2385 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
2386 | u32 sg_off, page_off; |
2387 | int i = 0, sg_nents; | |
2388 | ||
2389 | sg_off = offset / PAGE_SIZE; | |
2390 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
2391 | sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); | |
2392 | page_off = offset % PAGE_SIZE; | |
2393 | ||
e622f2f4 CH |
2394 | rdma_wr->wr.sg_list = ib_sge; |
2395 | rdma_wr->wr.wr_id = (uintptr_t)&isert_cmd->tx_desc; | |
b8d26b3b NB |
2396 | /* |
2397 | * Perform mapping of TCM scatterlist memory ib_sge dma_addr. | |
2398 | */ | |
2399 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
4c22e07f SG |
2400 | isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, " |
2401 | "page_off: %u\n", | |
2402 | (unsigned long long)tmp_sg->dma_address, | |
2403 | tmp_sg->length, page_off); | |
b8d26b3b NB |
2404 | |
2405 | ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; | |
2406 | ib_sge->length = min_t(u32, data_left, | |
2407 | ib_sg_dma_len(ib_dev, tmp_sg) - page_off); | |
34efc7df | 2408 | ib_sge->lkey = device->pd->local_dma_lkey; |
b8d26b3b | 2409 | |
4c22e07f SG |
2410 | isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n", |
2411 | ib_sge->addr, ib_sge->length, ib_sge->lkey); | |
b8d26b3b NB |
2412 | page_off = 0; |
2413 | data_left -= ib_sge->length; | |
9253e667 SG |
2414 | if (!data_left) |
2415 | break; | |
b8d26b3b | 2416 | ib_sge++; |
24f412dd | 2417 | isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge); |
b8d26b3b NB |
2418 | } |
2419 | ||
e622f2f4 | 2420 | rdma_wr->wr.num_sge = ++i; |
24f412dd | 2421 | isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", |
e622f2f4 | 2422 | rdma_wr->wr.sg_list, rdma_wr->wr.num_sge); |
b8d26b3b | 2423 | |
e622f2f4 | 2424 | return rdma_wr->wr.num_sge; |
b8d26b3b NB |
2425 | } |
2426 | ||
2427 | static int | |
90ecc6e2 VP |
2428 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2429 | struct isert_rdma_wr *wr) | |
b8d26b3b NB |
2430 | { |
2431 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2432 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2433 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2434 | struct isert_data_buf *data = &wr->data; |
e622f2f4 | 2435 | struct ib_rdma_wr *rdma_wr; |
b8d26b3b | 2436 | struct ib_sge *ib_sge; |
e3d7e4c3 SG |
2437 | u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; |
2438 | int ret = 0, i, ib_sge_cnt; | |
90ecc6e2 | 2439 | |
e3d7e4c3 | 2440 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
b8d26b3b | 2441 | |
e3d7e4c3 SG |
2442 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2443 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2444 | se_cmd->t_data_nents, se_cmd->data_length, | |
2445 | offset, wr->iser_ib_op, &wr->data); | |
2446 | if (ret) | |
2447 | return ret; | |
b8d26b3b | 2448 | |
e3d7e4c3 SG |
2449 | data_left = data->len; |
2450 | offset = data->offset; | |
b8d26b3b | 2451 | |
e3d7e4c3 | 2452 | ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); |
b8d26b3b | 2453 | if (!ib_sge) { |
24f412dd | 2454 | isert_warn("Unable to allocate ib_sge\n"); |
b8d26b3b | 2455 | ret = -ENOMEM; |
e3d7e4c3 | 2456 | goto unmap_cmd; |
b8d26b3b | 2457 | } |
90ecc6e2 | 2458 | wr->ib_sge = ib_sge; |
b8d26b3b | 2459 | |
e622f2f4 CH |
2460 | wr->rdma_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); |
2461 | wr->rdma_wr = kzalloc(sizeof(struct ib_rdma_wr) * wr->rdma_wr_num, | |
b8d26b3b | 2462 | GFP_KERNEL); |
e622f2f4 CH |
2463 | if (!wr->rdma_wr) { |
2464 | isert_dbg("Unable to allocate wr->rdma_wr\n"); | |
b8d26b3b | 2465 | ret = -ENOMEM; |
e3d7e4c3 | 2466 | goto unmap_cmd; |
b8d26b3b | 2467 | } |
b8d26b3b NB |
2468 | |
2469 | wr->isert_cmd = isert_cmd; | |
2470 | rdma_write_max = isert_conn->max_sge * PAGE_SIZE; | |
b8d26b3b | 2471 | |
e622f2f4 CH |
2472 | for (i = 0; i < wr->rdma_wr_num; i++) { |
2473 | rdma_wr = &isert_cmd->rdma_wr.rdma_wr[i]; | |
b8d26b3b NB |
2474 | data_len = min(data_left, rdma_write_max); |
2475 | ||
e622f2f4 | 2476 | rdma_wr->wr.send_flags = 0; |
90ecc6e2 | 2477 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
e622f2f4 CH |
2478 | rdma_wr->wr.opcode = IB_WR_RDMA_WRITE; |
2479 | rdma_wr->remote_addr = isert_cmd->read_va + offset; | |
2480 | rdma_wr->rkey = isert_cmd->read_stag; | |
2481 | if (i + 1 == wr->rdma_wr_num) | |
2482 | rdma_wr->wr.next = &isert_cmd->tx_desc.send_wr; | |
90ecc6e2 | 2483 | else |
e622f2f4 | 2484 | rdma_wr->wr.next = &wr->rdma_wr[i + 1].wr; |
90ecc6e2 | 2485 | } else { |
e622f2f4 CH |
2486 | rdma_wr->wr.opcode = IB_WR_RDMA_READ; |
2487 | rdma_wr->remote_addr = isert_cmd->write_va + va_offset; | |
2488 | rdma_wr->rkey = isert_cmd->write_stag; | |
2489 | if (i + 1 == wr->rdma_wr_num) | |
2490 | rdma_wr->wr.send_flags = IB_SEND_SIGNALED; | |
90ecc6e2 | 2491 | else |
e622f2f4 | 2492 | rdma_wr->wr.next = &wr->rdma_wr[i + 1].wr; |
90ecc6e2 | 2493 | } |
b8d26b3b NB |
2494 | |
2495 | ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, | |
e622f2f4 | 2496 | rdma_wr, data_len, offset); |
b8d26b3b NB |
2497 | ib_sge += ib_sge_cnt; |
2498 | ||
b8d26b3b | 2499 | offset += data_len; |
90ecc6e2 | 2500 | va_offset += data_len; |
b8d26b3b NB |
2501 | data_left -= data_len; |
2502 | } | |
90ecc6e2 VP |
2503 | |
2504 | return 0; | |
e3d7e4c3 SG |
2505 | unmap_cmd: |
2506 | isert_unmap_data_buf(isert_conn, data); | |
2507 | ||
90ecc6e2 VP |
2508 | return ret; |
2509 | } | |
2510 | ||
10633c37 SG |
2511 | static inline void |
2512 | isert_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr) | |
2513 | { | |
2514 | u32 rkey; | |
2515 | ||
2516 | memset(inv_wr, 0, sizeof(*inv_wr)); | |
2517 | inv_wr->wr_id = ISER_FASTREG_LI_WRID; | |
2518 | inv_wr->opcode = IB_WR_LOCAL_INV; | |
2519 | inv_wr->ex.invalidate_rkey = mr->rkey; | |
2520 | ||
2521 | /* Bump the key */ | |
2522 | rkey = ib_inc_rkey(mr->rkey); | |
2523 | ib_update_fast_reg_key(mr, rkey); | |
2524 | } | |
2525 | ||
59464ef4 | 2526 | static int |
e3d7e4c3 SG |
2527 | isert_fast_reg_mr(struct isert_conn *isert_conn, |
2528 | struct fast_reg_descriptor *fr_desc, | |
2529 | struct isert_data_buf *mem, | |
9e961ae7 | 2530 | enum isert_indicator ind, |
e3d7e4c3 | 2531 | struct ib_sge *sge) |
59464ef4 | 2532 | { |
dac6ab30 | 2533 | struct isert_device *device = isert_conn->device; |
67cb3949 | 2534 | struct ib_device *ib_dev = device->ib_device; |
9e961ae7 | 2535 | struct ib_mr *mr; |
16c2d702 | 2536 | struct ib_reg_wr reg_wr; |
e622f2f4 | 2537 | struct ib_send_wr inv_wr, *bad_wr, *wr = NULL; |
16c2d702 | 2538 | int ret, n; |
59464ef4 | 2539 | |
e3d7e4c3 | 2540 | if (mem->dma_nents == 1) { |
34efc7df | 2541 | sge->lkey = device->pd->local_dma_lkey; |
e3d7e4c3 SG |
2542 | sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); |
2543 | sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); | |
4c22e07f SG |
2544 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2545 | sge->addr, sge->length, sge->lkey); | |
e3d7e4c3 SG |
2546 | return 0; |
2547 | } | |
2548 | ||
16c2d702 | 2549 | if (ind == ISERT_DATA_KEY_VALID) |
9e961ae7 SG |
2550 | /* Registering data buffer */ |
2551 | mr = fr_desc->data_mr; | |
16c2d702 | 2552 | else |
9e961ae7 SG |
2553 | /* Registering protection buffer */ |
2554 | mr = fr_desc->pi_ctx->prot_mr; | |
59464ef4 | 2555 | |
10633c37 SG |
2556 | if (!(fr_desc->ind & ind)) { |
2557 | isert_inv_rkey(&inv_wr, mr); | |
59464ef4 | 2558 | wr = &inv_wr; |
59464ef4 VP |
2559 | } |
2560 | ||
16c2d702 SG |
2561 | n = ib_map_mr_sg(mr, mem->sg, mem->nents, PAGE_SIZE); |
2562 | if (unlikely(n != mem->nents)) { | |
2563 | isert_err("failed to map mr sg (%d/%d)\n", | |
2564 | n, mem->nents); | |
2565 | return n < 0 ? n : -EINVAL; | |
2566 | } | |
2567 | ||
2568 | isert_dbg("Use fr_desc %p sg_nents %d offset %u\n", | |
2569 | fr_desc, mem->nents, mem->offset); | |
2570 | ||
2571 | reg_wr.wr.next = NULL; | |
2572 | reg_wr.wr.opcode = IB_WR_REG_MR; | |
2573 | reg_wr.wr.wr_id = ISER_FASTREG_LI_WRID; | |
2574 | reg_wr.wr.send_flags = 0; | |
2575 | reg_wr.wr.num_sge = 0; | |
2576 | reg_wr.mr = mr; | |
2577 | reg_wr.key = mr->lkey; | |
2578 | reg_wr.access = IB_ACCESS_LOCAL_WRITE; | |
59464ef4 VP |
2579 | |
2580 | if (!wr) | |
16c2d702 | 2581 | wr = ®_wr.wr; |
59464ef4 | 2582 | else |
16c2d702 | 2583 | wr->next = ®_wr.wr; |
59464ef4 | 2584 | |
dac6ab30 | 2585 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
59464ef4 | 2586 | if (ret) { |
24f412dd | 2587 | isert_err("fast registration failed, ret:%d\n", ret); |
59464ef4 VP |
2588 | return ret; |
2589 | } | |
9e961ae7 | 2590 | fr_desc->ind &= ~ind; |
59464ef4 | 2591 | |
9e961ae7 | 2592 | sge->lkey = mr->lkey; |
16c2d702 SG |
2593 | sge->addr = mr->iova; |
2594 | sge->length = mr->length; | |
59464ef4 | 2595 | |
4c22e07f SG |
2596 | isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", |
2597 | sge->addr, sge->length, sge->lkey); | |
9e961ae7 SG |
2598 | |
2599 | return ret; | |
2600 | } | |
2601 | ||
3d73cf1a SG |
2602 | static inline void |
2603 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, | |
2604 | struct ib_sig_domain *domain) | |
2605 | { | |
78eda2bb | 2606 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
2607 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
2608 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
2609 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
2610 | /* |
2611 | * At the moment we hard code those, but if in the future | |
2612 | * the target core would like to use it, we will take it | |
2613 | * from se_cmd. | |
2614 | */ | |
2615 | domain->sig.dif.apptag_check_mask = 0xffff; | |
2616 | domain->sig.dif.app_escape = true; | |
2617 | domain->sig.dif.ref_escape = true; | |
2618 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
2619 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
2620 | domain->sig.dif.ref_remap = true; | |
3d73cf1a SG |
2621 | }; |
2622 | ||
9e961ae7 SG |
2623 | static int |
2624 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2625 | { | |
9e961ae7 SG |
2626 | switch (se_cmd->prot_op) { |
2627 | case TARGET_PROT_DIN_INSERT: | |
2628 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2629 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2630 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
9e961ae7 SG |
2631 | break; |
2632 | case TARGET_PROT_DOUT_INSERT: | |
2633 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2634 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
3d73cf1a | 2635 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); |
9e961ae7 SG |
2636 | break; |
2637 | case TARGET_PROT_DIN_PASS: | |
2638 | case TARGET_PROT_DOUT_PASS: | |
3d73cf1a SG |
2639 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); |
2640 | isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); | |
9e961ae7 SG |
2641 | break; |
2642 | default: | |
24f412dd | 2643 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2644 | return -EINVAL; |
2645 | } | |
2646 | ||
2647 | return 0; | |
2648 | } | |
2649 | ||
2650 | static inline u8 | |
2651 | isert_set_prot_checks(u8 prot_checks) | |
2652 | { | |
2653 | return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | | |
2654 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | | |
2655 | (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); | |
2656 | } | |
2657 | ||
2658 | static int | |
570db170 SG |
2659 | isert_reg_sig_mr(struct isert_conn *isert_conn, |
2660 | struct se_cmd *se_cmd, | |
2661 | struct isert_rdma_wr *rdma_wr, | |
2662 | struct fast_reg_descriptor *fr_desc) | |
9e961ae7 | 2663 | { |
e622f2f4 CH |
2664 | struct ib_sig_handover_wr sig_wr; |
2665 | struct ib_send_wr inv_wr, *bad_wr, *wr = NULL; | |
9e961ae7 SG |
2666 | struct pi_context *pi_ctx = fr_desc->pi_ctx; |
2667 | struct ib_sig_attrs sig_attrs; | |
2668 | int ret; | |
9e961ae7 SG |
2669 | |
2670 | memset(&sig_attrs, 0, sizeof(sig_attrs)); | |
2671 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); | |
2672 | if (ret) | |
2673 | goto err; | |
59464ef4 | 2674 | |
9e961ae7 SG |
2675 | sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); |
2676 | ||
2677 | if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { | |
10633c37 | 2678 | isert_inv_rkey(&inv_wr, pi_ctx->sig_mr); |
9e961ae7 | 2679 | wr = &inv_wr; |
9e961ae7 SG |
2680 | } |
2681 | ||
2682 | memset(&sig_wr, 0, sizeof(sig_wr)); | |
e622f2f4 CH |
2683 | sig_wr.wr.opcode = IB_WR_REG_SIG_MR; |
2684 | sig_wr.wr.wr_id = ISER_FASTREG_LI_WRID; | |
2685 | sig_wr.wr.sg_list = &rdma_wr->ib_sg[DATA]; | |
2686 | sig_wr.wr.num_sge = 1; | |
2687 | sig_wr.access_flags = IB_ACCESS_LOCAL_WRITE; | |
2688 | sig_wr.sig_attrs = &sig_attrs; | |
2689 | sig_wr.sig_mr = pi_ctx->sig_mr; | |
9e961ae7 | 2690 | if (se_cmd->t_prot_sg) |
e622f2f4 | 2691 | sig_wr.prot = &rdma_wr->ib_sg[PROT]; |
9e961ae7 SG |
2692 | |
2693 | if (!wr) | |
e622f2f4 | 2694 | wr = &sig_wr.wr; |
9e961ae7 | 2695 | else |
e622f2f4 | 2696 | wr->next = &sig_wr.wr; |
9e961ae7 | 2697 | |
dac6ab30 | 2698 | ret = ib_post_send(isert_conn->qp, wr, &bad_wr); |
9e961ae7 | 2699 | if (ret) { |
24f412dd | 2700 | isert_err("fast registration failed, ret:%d\n", ret); |
9e961ae7 SG |
2701 | goto err; |
2702 | } | |
2703 | fr_desc->ind &= ~ISERT_SIG_KEY_VALID; | |
2704 | ||
570db170 SG |
2705 | rdma_wr->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey; |
2706 | rdma_wr->ib_sg[SIG].addr = 0; | |
2707 | rdma_wr->ib_sg[SIG].length = se_cmd->data_length; | |
9e961ae7 SG |
2708 | if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && |
2709 | se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) | |
2710 | /* | |
2711 | * We have protection guards on the wire | |
2712 | * so we need to set a larget transfer | |
2713 | */ | |
570db170 | 2714 | rdma_wr->ib_sg[SIG].length += se_cmd->prot_length; |
9e961ae7 | 2715 | |
24f412dd | 2716 | isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n", |
570db170 SG |
2717 | rdma_wr->ib_sg[SIG].addr, rdma_wr->ib_sg[SIG].length, |
2718 | rdma_wr->ib_sg[SIG].lkey); | |
9e961ae7 | 2719 | err: |
59464ef4 VP |
2720 | return ret; |
2721 | } | |
2722 | ||
570db170 SG |
2723 | static int |
2724 | isert_handle_prot_cmd(struct isert_conn *isert_conn, | |
2725 | struct isert_cmd *isert_cmd, | |
2726 | struct isert_rdma_wr *wr) | |
2727 | { | |
dac6ab30 | 2728 | struct isert_device *device = isert_conn->device; |
570db170 SG |
2729 | struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd; |
2730 | int ret; | |
2731 | ||
2732 | if (!wr->fr_desc->pi_ctx) { | |
2733 | ret = isert_create_pi_ctx(wr->fr_desc, | |
2734 | device->ib_device, | |
67cb3949 | 2735 | device->pd); |
570db170 | 2736 | if (ret) { |
24f412dd | 2737 | isert_err("conn %p failed to allocate pi_ctx\n", |
570db170 SG |
2738 | isert_conn); |
2739 | return ret; | |
2740 | } | |
2741 | } | |
2742 | ||
2743 | if (se_cmd->t_prot_sg) { | |
2744 | ret = isert_map_data_buf(isert_conn, isert_cmd, | |
2745 | se_cmd->t_prot_sg, | |
2746 | se_cmd->t_prot_nents, | |
2747 | se_cmd->prot_length, | |
2748 | 0, wr->iser_ib_op, &wr->prot); | |
2749 | if (ret) { | |
24f412dd | 2750 | isert_err("conn %p failed to map protection buffer\n", |
570db170 SG |
2751 | isert_conn); |
2752 | return ret; | |
2753 | } | |
2754 | ||
2755 | memset(&wr->ib_sg[PROT], 0, sizeof(wr->ib_sg[PROT])); | |
2756 | ret = isert_fast_reg_mr(isert_conn, wr->fr_desc, &wr->prot, | |
2757 | ISERT_PROT_KEY_VALID, &wr->ib_sg[PROT]); | |
2758 | if (ret) { | |
24f412dd | 2759 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2760 | isert_conn); |
2761 | goto unmap_prot_cmd; | |
2762 | } | |
2763 | } | |
2764 | ||
2765 | ret = isert_reg_sig_mr(isert_conn, se_cmd, wr, wr->fr_desc); | |
2766 | if (ret) { | |
24f412dd | 2767 | isert_err("conn %p failed to fast reg mr\n", |
570db170 SG |
2768 | isert_conn); |
2769 | goto unmap_prot_cmd; | |
2770 | } | |
2771 | wr->fr_desc->ind |= ISERT_PROTECTED; | |
2772 | ||
2773 | return 0; | |
2774 | ||
2775 | unmap_prot_cmd: | |
2776 | if (se_cmd->t_prot_sg) | |
2777 | isert_unmap_data_buf(isert_conn, &wr->prot); | |
2778 | ||
2779 | return ret; | |
2780 | } | |
2781 | ||
59464ef4 | 2782 | static int |
a3a5a826 SG |
2783 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2784 | struct isert_rdma_wr *wr) | |
59464ef4 VP |
2785 | { |
2786 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
2787 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
e3d7e4c3 | 2788 | struct isert_conn *isert_conn = conn->context; |
e3d7e4c3 | 2789 | struct fast_reg_descriptor *fr_desc = NULL; |
e622f2f4 | 2790 | struct ib_rdma_wr *rdma_wr; |
570db170 | 2791 | struct ib_sge *ib_sg; |
e3d7e4c3 SG |
2792 | u32 offset; |
2793 | int ret = 0; | |
59464ef4 VP |
2794 | unsigned long flags; |
2795 | ||
e3d7e4c3 | 2796 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
59464ef4 | 2797 | |
e3d7e4c3 SG |
2798 | offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; |
2799 | ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, | |
2800 | se_cmd->t_data_nents, se_cmd->data_length, | |
2801 | offset, wr->iser_ib_op, &wr->data); | |
2802 | if (ret) | |
2803 | return ret; | |
59464ef4 | 2804 | |
302cc7c3 | 2805 | if (wr->data.dma_nents != 1 || isert_prot_cmd(isert_conn, se_cmd)) { |
dac6ab30 SG |
2806 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2807 | fr_desc = list_first_entry(&isert_conn->fr_pool, | |
e3d7e4c3 SG |
2808 | struct fast_reg_descriptor, list); |
2809 | list_del(&fr_desc->list); | |
dac6ab30 | 2810 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); |
e3d7e4c3 | 2811 | wr->fr_desc = fr_desc; |
59464ef4 | 2812 | } |
59464ef4 | 2813 | |
9e961ae7 | 2814 | ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, |
570db170 | 2815 | ISERT_DATA_KEY_VALID, &wr->ib_sg[DATA]); |
e3d7e4c3 SG |
2816 | if (ret) |
2817 | goto unmap_cmd; | |
59464ef4 | 2818 | |
302cc7c3 | 2819 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
570db170 | 2820 | ret = isert_handle_prot_cmd(isert_conn, isert_cmd, wr); |
9e961ae7 | 2821 | if (ret) |
570db170 | 2822 | goto unmap_cmd; |
9e961ae7 | 2823 | |
570db170 SG |
2824 | ib_sg = &wr->ib_sg[SIG]; |
2825 | } else { | |
2826 | ib_sg = &wr->ib_sg[DATA]; | |
2827 | } | |
9e961ae7 | 2828 | |
570db170 | 2829 | memcpy(&wr->s_ib_sge, ib_sg, sizeof(*ib_sg)); |
e3d7e4c3 | 2830 | wr->ib_sge = &wr->s_ib_sge; |
e622f2f4 CH |
2831 | wr->rdma_wr_num = 1; |
2832 | memset(&wr->s_rdma_wr, 0, sizeof(wr->s_rdma_wr)); | |
2833 | wr->rdma_wr = &wr->s_rdma_wr; | |
59464ef4 | 2834 | wr->isert_cmd = isert_cmd; |
59464ef4 | 2835 | |
e622f2f4 CH |
2836 | rdma_wr = &isert_cmd->rdma_wr.s_rdma_wr; |
2837 | rdma_wr->wr.sg_list = &wr->s_ib_sge; | |
2838 | rdma_wr->wr.num_sge = 1; | |
2839 | rdma_wr->wr.wr_id = (uintptr_t)&isert_cmd->tx_desc; | |
59464ef4 | 2840 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
e622f2f4 CH |
2841 | rdma_wr->wr.opcode = IB_WR_RDMA_WRITE; |
2842 | rdma_wr->remote_addr = isert_cmd->read_va; | |
2843 | rdma_wr->rkey = isert_cmd->read_stag; | |
2844 | rdma_wr->wr.send_flags = !isert_prot_cmd(isert_conn, se_cmd) ? | |
9e961ae7 | 2845 | 0 : IB_SEND_SIGNALED; |
59464ef4 | 2846 | } else { |
e622f2f4 CH |
2847 | rdma_wr->wr.opcode = IB_WR_RDMA_READ; |
2848 | rdma_wr->remote_addr = isert_cmd->write_va; | |
2849 | rdma_wr->rkey = isert_cmd->write_stag; | |
2850 | rdma_wr->wr.send_flags = IB_SEND_SIGNALED; | |
59464ef4 VP |
2851 | } |
2852 | ||
e3d7e4c3 | 2853 | return 0; |
570db170 | 2854 | |
e3d7e4c3 SG |
2855 | unmap_cmd: |
2856 | if (fr_desc) { | |
dac6ab30 SG |
2857 | spin_lock_irqsave(&isert_conn->pool_lock, flags); |
2858 | list_add_tail(&fr_desc->list, &isert_conn->fr_pool); | |
2859 | spin_unlock_irqrestore(&isert_conn->pool_lock, flags); | |
59464ef4 | 2860 | } |
e3d7e4c3 | 2861 | isert_unmap_data_buf(isert_conn, &wr->data); |
59464ef4 | 2862 | |
59464ef4 VP |
2863 | return ret; |
2864 | } | |
2865 | ||
90ecc6e2 VP |
2866 | static int |
2867 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2868 | { | |
2869 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2870 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
90ecc6e2 | 2871 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2872 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2873 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2874 | struct ib_send_wr *wr_failed; |
2875 | int rc; | |
2876 | ||
24f412dd | 2877 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2878 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2879 | |
90ecc6e2 | 2880 | wr->iser_ib_op = ISER_IB_RDMA_WRITE; |
d40945d8 | 2881 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2882 | if (rc) { |
24f412dd | 2883 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 VP |
2884 | return rc; |
2885 | } | |
2886 | ||
302cc7c3 | 2887 | if (!isert_prot_cmd(isert_conn, se_cmd)) { |
9e961ae7 SG |
2888 | /* |
2889 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2890 | */ | |
2891 | isert_create_send_desc(isert_conn, isert_cmd, | |
2892 | &isert_cmd->tx_desc); | |
2893 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2894 | &isert_cmd->tx_desc.iscsi_header); | |
2895 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2896 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2897 | &isert_cmd->tx_desc.send_wr); |
e622f2f4 CH |
2898 | isert_cmd->rdma_wr.s_rdma_wr.wr.next = &isert_cmd->tx_desc.send_wr; |
2899 | wr->rdma_wr_num += 1; | |
4366b19c JD |
2900 | |
2901 | rc = isert_post_recv(isert_conn, isert_cmd->rx_desc); | |
2902 | if (rc) { | |
2903 | isert_err("ib_post_recv failed with %d\n", rc); | |
2904 | return rc; | |
2905 | } | |
9e961ae7 | 2906 | } |
b8d26b3b | 2907 | |
e622f2f4 | 2908 | rc = ib_post_send(isert_conn->qp, &wr->rdma_wr->wr, &wr_failed); |
bdf20e72 | 2909 | if (rc) |
24f412dd | 2910 | isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); |
9e961ae7 | 2911 | |
302cc7c3 | 2912 | if (!isert_prot_cmd(isert_conn, se_cmd)) |
24f412dd | 2913 | isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data " |
9e961ae7 SG |
2914 | "READ\n", isert_cmd); |
2915 | else | |
24f412dd | 2916 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", |
9e961ae7 | 2917 | isert_cmd); |
b8d26b3b | 2918 | |
90ecc6e2 | 2919 | return 1; |
b8d26b3b NB |
2920 | } |
2921 | ||
2922 | static int | |
2923 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2924 | { | |
2925 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2926 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 2927 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
6700425e | 2928 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 2929 | struct isert_device *device = isert_conn->device; |
90ecc6e2 VP |
2930 | struct ib_send_wr *wr_failed; |
2931 | int rc; | |
b8d26b3b | 2932 | |
24f412dd | 2933 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
90ecc6e2 | 2934 | isert_cmd, se_cmd->data_length, cmd->write_data_done); |
b8d26b3b | 2935 | wr->iser_ib_op = ISER_IB_RDMA_READ; |
d40945d8 | 2936 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 | 2937 | if (rc) { |
24f412dd | 2938 | isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); |
90ecc6e2 | 2939 | return rc; |
b8d26b3b NB |
2940 | } |
2941 | ||
e622f2f4 | 2942 | rc = ib_post_send(isert_conn->qp, &wr->rdma_wr->wr, &wr_failed); |
bdf20e72 | 2943 | if (rc) |
24f412dd | 2944 | isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); |
bdf20e72 | 2945 | |
24f412dd | 2946 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", |
90ecc6e2 | 2947 | isert_cmd); |
b8d26b3b | 2948 | |
90ecc6e2 | 2949 | return 0; |
b8d26b3b NB |
2950 | } |
2951 | ||
2952 | static int | |
2953 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2954 | { | |
a4c15cd9 JD |
2955 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
2956 | int ret = 0; | |
b8d26b3b NB |
2957 | |
2958 | switch (state) { | |
a4c15cd9 JD |
2959 | case ISTATE_REMOVE: |
2960 | spin_lock_bh(&conn->cmd_lock); | |
2961 | list_del_init(&cmd->i_conn_node); | |
2962 | spin_unlock_bh(&conn->cmd_lock); | |
2963 | isert_put_cmd(isert_cmd, true); | |
2964 | break; | |
b8d26b3b NB |
2965 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: |
2966 | ret = isert_put_nopin(cmd, conn, false); | |
2967 | break; | |
2968 | default: | |
24f412dd | 2969 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
2970 | ret = -EINVAL; |
2971 | break; | |
2972 | } | |
2973 | ||
2974 | return ret; | |
2975 | } | |
2976 | ||
2977 | static int | |
2978 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2979 | { | |
991bb764 | 2980 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2981 | int ret; |
2982 | ||
2983 | switch (state) { | |
2984 | case ISTATE_SEND_LOGOUTRSP: | |
2985 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
2986 | if (!ret) |
2987 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
2988 | break; |
2989 | case ISTATE_SEND_NOPIN: | |
2990 | ret = isert_put_nopin(cmd, conn, true); | |
2991 | break; | |
2992 | case ISTATE_SEND_TASKMGTRSP: | |
2993 | ret = isert_put_tm_rsp(cmd, conn); | |
2994 | break; | |
2995 | case ISTATE_SEND_REJECT: | |
2996 | ret = isert_put_reject(cmd, conn); | |
2997 | break; | |
adb54c29 NB |
2998 | case ISTATE_SEND_TEXTRSP: |
2999 | ret = isert_put_text_rsp(cmd, conn); | |
3000 | break; | |
b8d26b3b NB |
3001 | case ISTATE_SEND_STATUS: |
3002 | /* | |
3003 | * Special case for sending non GOOD SCSI status from TX thread | |
3004 | * context during pre se_cmd excecution failure. | |
3005 | */ | |
3006 | ret = isert_put_response(conn, cmd); | |
3007 | break; | |
3008 | default: | |
24f412dd | 3009 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
3010 | ret = -EINVAL; |
3011 | break; | |
3012 | } | |
3013 | ||
3014 | return ret; | |
3015 | } | |
3016 | ||
ca6c1d82 SG |
3017 | struct rdma_cm_id * |
3018 | isert_setup_id(struct isert_np *isert_np) | |
3019 | { | |
3020 | struct iscsi_np *np = isert_np->np; | |
3021 | struct rdma_cm_id *id; | |
3022 | struct sockaddr *sa; | |
3023 | int ret; | |
3024 | ||
3025 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 3026 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 | 3027 | |
fa20105e | 3028 | id = rdma_create_id(&init_net, isert_cma_handler, isert_np, |
ca6c1d82 SG |
3029 | RDMA_PS_TCP, IB_QPT_RC); |
3030 | if (IS_ERR(id)) { | |
24f412dd | 3031 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
3032 | ret = PTR_ERR(id); |
3033 | goto out; | |
3034 | } | |
24f412dd | 3035 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 SG |
3036 | |
3037 | ret = rdma_bind_addr(id, sa); | |
3038 | if (ret) { | |
24f412dd | 3039 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
3040 | goto out_id; |
3041 | } | |
3042 | ||
992607e8 | 3043 | ret = rdma_listen(id, 0); |
ca6c1d82 | 3044 | if (ret) { |
24f412dd | 3045 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
3046 | goto out_id; |
3047 | } | |
3048 | ||
3049 | return id; | |
3050 | out_id: | |
3051 | rdma_destroy_id(id); | |
3052 | out: | |
3053 | return ERR_PTR(ret); | |
3054 | } | |
3055 | ||
b8d26b3b NB |
3056 | static int |
3057 | isert_setup_np(struct iscsi_np *np, | |
13a3cf08 | 3058 | struct sockaddr_storage *ksockaddr) |
b8d26b3b NB |
3059 | { |
3060 | struct isert_np *isert_np; | |
3061 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
3062 | int ret; |
3063 | ||
3064 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
3065 | if (!isert_np) { | |
24f412dd | 3066 | isert_err("Unable to allocate struct isert_np\n"); |
b8d26b3b NB |
3067 | return -ENOMEM; |
3068 | } | |
ed8cb0a4 JD |
3069 | sema_init(&isert_np->sem, 0); |
3070 | mutex_init(&isert_np->mutex); | |
bd379220 JD |
3071 | INIT_LIST_HEAD(&isert_np->accepted); |
3072 | INIT_LIST_HEAD(&isert_np->pending); | |
ca6c1d82 | 3073 | isert_np->np = np; |
b8d26b3b | 3074 | |
b8d26b3b NB |
3075 | /* |
3076 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
3077 | * in iscsi_target_configfs.c code.. | |
3078 | */ | |
3079 | memcpy(&np->np_sockaddr, ksockaddr, | |
13a3cf08 | 3080 | sizeof(struct sockaddr_storage)); |
b8d26b3b | 3081 | |
ca6c1d82 | 3082 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 3083 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
3084 | ret = PTR_ERR(isert_lid); |
3085 | goto out; | |
3086 | } | |
3087 | ||
ed8cb0a4 | 3088 | isert_np->cm_id = isert_lid; |
b8d26b3b | 3089 | np->np_context = isert_np; |
b8d26b3b NB |
3090 | |
3091 | return 0; | |
3092 | ||
b8d26b3b NB |
3093 | out: |
3094 | kfree(isert_np); | |
ca6c1d82 | 3095 | |
b8d26b3b NB |
3096 | return ret; |
3097 | } | |
3098 | ||
b8d26b3b NB |
3099 | static int |
3100 | isert_rdma_accept(struct isert_conn *isert_conn) | |
3101 | { | |
dac6ab30 | 3102 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
3103 | struct rdma_conn_param cp; |
3104 | int ret; | |
3105 | ||
3106 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
3107 | cp.initiator_depth = isert_conn->initiator_depth; |
3108 | cp.retry_count = 7; | |
3109 | cp.rnr_retry_count = 7; | |
3110 | ||
b8d26b3b NB |
3111 | ret = rdma_accept(cm_id, &cp); |
3112 | if (ret) { | |
24f412dd | 3113 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
3114 | return ret; |
3115 | } | |
3116 | ||
b8d26b3b NB |
3117 | return 0; |
3118 | } | |
3119 | ||
3120 | static int | |
3121 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
3122 | { | |
6700425e | 3123 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
3124 | int ret; |
3125 | ||
24f412dd | 3126 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
3127 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
3128 | if (ret) { | |
24f412dd | 3129 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
3130 | isert_conn); |
3131 | return ret; | |
3132 | } | |
3133 | reinit_completion(&isert_conn->login_req_comp); | |
3134 | ||
6faaa85f NB |
3135 | /* |
3136 | * For login requests after the first PDU, isert_rx_login_req() will | |
3137 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
3138 | * received, which turns this callback from iscsi_target_do_login_rx() | |
3139 | * into a NOP. | |
3140 | */ | |
3141 | if (!login->first_request) | |
3142 | return 0; | |
b8d26b3b | 3143 | |
2371e5da SG |
3144 | isert_rx_login_req(isert_conn); |
3145 | ||
dac6ab30 SG |
3146 | isert_info("before login_comp conn: %p\n", conn); |
3147 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
3148 | if (ret) |
3149 | return ret; | |
3150 | ||
24f412dd | 3151 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 3152 | |
b8d26b3b NB |
3153 | return 0; |
3154 | } | |
3155 | ||
3156 | static void | |
3157 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
3158 | struct isert_conn *isert_conn) | |
3159 | { | |
dac6ab30 | 3160 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b | 3161 | struct rdma_route *cm_route = &cm_id->route; |
b8d26b3b NB |
3162 | |
3163 | conn->login_family = np->np_sockaddr.ss_family; | |
3164 | ||
dc58f760 AG |
3165 | conn->login_sockaddr = cm_route->addr.dst_addr; |
3166 | conn->local_sockaddr = cm_route->addr.src_addr; | |
b8d26b3b NB |
3167 | } |
3168 | ||
3169 | static int | |
3170 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
3171 | { | |
6700425e | 3172 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 3173 | struct isert_conn *isert_conn; |
c6b8e918 | 3174 | int ret; |
b8d26b3b NB |
3175 | |
3176 | accept_wait: | |
ed8cb0a4 | 3177 | ret = down_interruptible(&isert_np->sem); |
c6b8e918 | 3178 | if (ret) |
b8d26b3b NB |
3179 | return -ENODEV; |
3180 | ||
3181 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 3182 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 3183 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 3184 | isert_dbg("np_thread_state %d\n", |
e346ab34 SG |
3185 | np->np_thread_state); |
3186 | /** | |
3187 | * No point in stalling here when np_thread | |
3188 | * is in state RESET/SHUTDOWN/EXIT - bail | |
3189 | **/ | |
b8d26b3b NB |
3190 | return -ENODEV; |
3191 | } | |
3192 | spin_unlock_bh(&np->np_thread_lock); | |
3193 | ||
ed8cb0a4 | 3194 | mutex_lock(&isert_np->mutex); |
bd379220 | 3195 | if (list_empty(&isert_np->pending)) { |
ed8cb0a4 | 3196 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
3197 | goto accept_wait; |
3198 | } | |
bd379220 JD |
3199 | isert_conn = list_first_entry(&isert_np->pending, |
3200 | struct isert_conn, node); | |
3201 | list_del_init(&isert_conn->node); | |
ed8cb0a4 | 3202 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
3203 | |
3204 | conn->context = isert_conn; | |
3205 | isert_conn->conn = conn; | |
b8d26b3b | 3206 | |
b8d26b3b NB |
3207 | isert_set_conn_info(np, conn, isert_conn); |
3208 | ||
24f412dd | 3209 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 3210 | |
b8d26b3b NB |
3211 | return 0; |
3212 | } | |
3213 | ||
3214 | static void | |
3215 | isert_free_np(struct iscsi_np *np) | |
3216 | { | |
6700425e | 3217 | struct isert_np *isert_np = np->np_context; |
268e6811 | 3218 | struct isert_conn *isert_conn, *n; |
b8d26b3b | 3219 | |
ed8cb0a4 JD |
3220 | if (isert_np->cm_id) |
3221 | rdma_destroy_id(isert_np->cm_id); | |
b8d26b3b | 3222 | |
268e6811 SG |
3223 | /* |
3224 | * FIXME: At this point we don't have a good way to insure | |
3225 | * that at this point we don't have hanging connections that | |
3226 | * completed RDMA establishment but didn't start iscsi login | |
3227 | * process. So work-around this by cleaning up what ever piled | |
bd379220 | 3228 | * up in accepted and pending lists. |
268e6811 | 3229 | */ |
ed8cb0a4 | 3230 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
3231 | if (!list_empty(&isert_np->pending)) { |
3232 | isert_info("Still have isert pending connections\n"); | |
3233 | list_for_each_entry_safe(isert_conn, n, | |
3234 | &isert_np->pending, | |
3235 | node) { | |
3236 | isert_info("cleaning isert_conn %p state (%d)\n", | |
3237 | isert_conn, isert_conn->state); | |
3238 | isert_connect_release(isert_conn); | |
3239 | } | |
3240 | } | |
3241 | ||
3242 | if (!list_empty(&isert_np->accepted)) { | |
3243 | isert_info("Still have isert accepted connections\n"); | |
268e6811 | 3244 | list_for_each_entry_safe(isert_conn, n, |
bd379220 JD |
3245 | &isert_np->accepted, |
3246 | node) { | |
24f412dd | 3247 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 SG |
3248 | isert_conn, isert_conn->state); |
3249 | isert_connect_release(isert_conn); | |
3250 | } | |
3251 | } | |
ed8cb0a4 | 3252 | mutex_unlock(&isert_np->mutex); |
268e6811 | 3253 | |
b8d26b3b NB |
3254 | np->np_context = NULL; |
3255 | kfree(isert_np); | |
3256 | } | |
3257 | ||
b02efbfc SG |
3258 | static void isert_release_work(struct work_struct *work) |
3259 | { | |
3260 | struct isert_conn *isert_conn = container_of(work, | |
3261 | struct isert_conn, | |
3262 | release_work); | |
3263 | ||
24f412dd | 3264 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 3265 | |
dac6ab30 | 3266 | wait_for_completion(&isert_conn->wait); |
b02efbfc | 3267 | |
dac6ab30 | 3268 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 3269 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 3270 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 3271 | |
24f412dd | 3272 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
3273 | isert_put_conn(isert_conn); |
3274 | } | |
3275 | ||
991bb764 SG |
3276 | static void |
3277 | isert_wait4logout(struct isert_conn *isert_conn) | |
3278 | { | |
3279 | struct iscsi_conn *conn = isert_conn->conn; | |
3280 | ||
4c22e07f SG |
3281 | isert_info("conn %p\n", isert_conn); |
3282 | ||
991bb764 | 3283 | if (isert_conn->logout_posted) { |
24f412dd | 3284 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
3285 | wait_for_completion_timeout(&conn->conn_logout_comp, |
3286 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3287 | } | |
3288 | } | |
3289 | ||
c7e160ee SG |
3290 | static void |
3291 | isert_wait4cmds(struct iscsi_conn *conn) | |
3292 | { | |
4c22e07f SG |
3293 | isert_info("iscsi_conn %p\n", conn); |
3294 | ||
c7e160ee SG |
3295 | if (conn->sess) { |
3296 | target_sess_cmd_list_set_waiting(conn->sess->se_sess); | |
3297 | target_wait_for_sess_cmds(conn->sess->se_sess); | |
3298 | } | |
3299 | } | |
3300 | ||
bdf20e72 SG |
3301 | static void |
3302 | isert_wait4flush(struct isert_conn *isert_conn) | |
3303 | { | |
3304 | struct ib_recv_wr *bad_wr; | |
3305 | ||
4c22e07f SG |
3306 | isert_info("conn %p\n", isert_conn); |
3307 | ||
dac6ab30 | 3308 | init_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3309 | isert_conn->beacon.wr_id = ISER_BEACON_WRID; |
3310 | /* post an indication that all flush errors were consumed */ | |
dac6ab30 | 3311 | if (ib_post_recv(isert_conn->qp, &isert_conn->beacon, &bad_wr)) { |
24f412dd | 3312 | isert_err("conn %p failed to post beacon", isert_conn); |
bdf20e72 SG |
3313 | return; |
3314 | } | |
3315 | ||
dac6ab30 | 3316 | wait_for_completion(&isert_conn->wait_comp_err); |
bdf20e72 SG |
3317 | } |
3318 | ||
3e03c4b0 JD |
3319 | /** |
3320 | * isert_put_unsol_pending_cmds() - Drop commands waiting for | |
3321 | * unsolicitate dataout | |
3322 | * @conn: iscsi connection | |
3323 | * | |
3324 | * We might still have commands that are waiting for unsolicited | |
3325 | * dataouts messages. We must put the extra reference on those | |
3326 | * before blocking on the target_wait_for_session_cmds | |
3327 | */ | |
3328 | static void | |
3329 | isert_put_unsol_pending_cmds(struct iscsi_conn *conn) | |
3330 | { | |
3331 | struct iscsi_cmd *cmd, *tmp; | |
3332 | static LIST_HEAD(drop_cmd_list); | |
3333 | ||
3334 | spin_lock_bh(&conn->cmd_lock); | |
3335 | list_for_each_entry_safe(cmd, tmp, &conn->conn_cmd_list, i_conn_node) { | |
3336 | if ((cmd->cmd_flags & ICF_NON_IMMEDIATE_UNSOLICITED_DATA) && | |
3337 | (cmd->write_data_done < conn->sess->sess_ops->FirstBurstLength) && | |
3338 | (cmd->write_data_done < cmd->se_cmd.data_length)) | |
3339 | list_move_tail(&cmd->i_conn_node, &drop_cmd_list); | |
3340 | } | |
3341 | spin_unlock_bh(&conn->cmd_lock); | |
3342 | ||
3343 | list_for_each_entry_safe(cmd, tmp, &drop_cmd_list, i_conn_node) { | |
3344 | list_del_init(&cmd->i_conn_node); | |
3345 | if (cmd->i_state != ISTATE_REMOVE) { | |
3346 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
3347 | ||
3348 | isert_info("conn %p dropping cmd %p\n", conn, cmd); | |
3349 | isert_put_cmd(isert_cmd, true); | |
3350 | } | |
3351 | } | |
3352 | } | |
3353 | ||
defd8848 | 3354 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
3355 | { |
3356 | struct isert_conn *isert_conn = conn->context; | |
3357 | ||
4c22e07f | 3358 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 3359 | |
dac6ab30 | 3360 | mutex_lock(&isert_conn->mutex); |
b8d26b3b | 3361 | /* |
dac6ab30 | 3362 | * Only wait for wait_comp_err if the isert_conn made it |
b8d26b3b NB |
3363 | * into full feature phase.. |
3364 | */ | |
b2cb9649 | 3365 | if (isert_conn->state == ISER_CONN_INIT) { |
dac6ab30 | 3366 | mutex_unlock(&isert_conn->mutex); |
b2cb9649 | 3367 | return; |
b8d26b3b | 3368 | } |
954f2372 | 3369 | isert_conn_terminate(isert_conn); |
dac6ab30 | 3370 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 3371 | |
bdf20e72 | 3372 | isert_wait4flush(isert_conn); |
3e03c4b0 JD |
3373 | isert_put_unsol_pending_cmds(conn); |
3374 | isert_wait4cmds(conn); | |
991bb764 | 3375 | isert_wait4logout(isert_conn); |
954f2372 | 3376 | |
b02efbfc | 3377 | queue_work(isert_release_wq, &isert_conn->release_work); |
defd8848 NB |
3378 | } |
3379 | ||
3380 | static void isert_free_conn(struct iscsi_conn *conn) | |
3381 | { | |
3382 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b | 3383 | |
524630d5 | 3384 | isert_wait4flush(isert_conn); |
b8d26b3b NB |
3385 | isert_put_conn(isert_conn); |
3386 | } | |
3387 | ||
3388 | static struct iscsit_transport iser_target_transport = { | |
3389 | .name = "IB/iSER", | |
3390 | .transport_type = ISCSI_INFINIBAND, | |
d703ce2f | 3391 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
3392 | .owner = THIS_MODULE, |
3393 | .iscsit_setup_np = isert_setup_np, | |
3394 | .iscsit_accept_np = isert_accept_np, | |
3395 | .iscsit_free_np = isert_free_np, | |
defd8848 | 3396 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 3397 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
3398 | .iscsit_get_login_rx = isert_get_login_rx, |
3399 | .iscsit_put_login_tx = isert_put_login_tx, | |
3400 | .iscsit_immediate_queue = isert_immediate_queue, | |
3401 | .iscsit_response_queue = isert_response_queue, | |
3402 | .iscsit_get_dataout = isert_get_dataout, | |
3403 | .iscsit_queue_data_in = isert_put_datain, | |
3404 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 3405 | .iscsit_aborted_task = isert_aborted_task, |
e70beee7 | 3406 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
3407 | }; |
3408 | ||
3409 | static int __init isert_init(void) | |
3410 | { | |
3411 | int ret; | |
3412 | ||
631af550 SG |
3413 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
3414 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 3415 | if (!isert_comp_wq) { |
24f412dd | 3416 | isert_err("Unable to allocate isert_comp_wq\n"); |
b8d26b3b | 3417 | ret = -ENOMEM; |
6f0fae3d | 3418 | return -ENOMEM; |
b8d26b3b NB |
3419 | } |
3420 | ||
b02efbfc SG |
3421 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
3422 | WQ_UNBOUND_MAX_ACTIVE); | |
3423 | if (!isert_release_wq) { | |
24f412dd | 3424 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
3425 | ret = -ENOMEM; |
3426 | goto destroy_comp_wq; | |
3427 | } | |
3428 | ||
b8d26b3b | 3429 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 3430 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 3431 | |
b8d26b3b NB |
3432 | return 0; |
3433 | ||
b02efbfc SG |
3434 | destroy_comp_wq: |
3435 | destroy_workqueue(isert_comp_wq); | |
6f0fae3d | 3436 | |
b8d26b3b NB |
3437 | return ret; |
3438 | } | |
3439 | ||
3440 | static void __exit isert_exit(void) | |
3441 | { | |
f5ebec96 | 3442 | flush_scheduled_work(); |
b02efbfc | 3443 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 3444 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 3445 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 3446 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
b8d26b3b NB |
3447 | } |
3448 | ||
3449 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
9e35eff4 | 3450 | MODULE_VERSION("1.0"); |
b8d26b3b NB |
3451 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
3452 | MODULE_LICENSE("GPL"); | |
3453 | ||
3454 | module_init(isert_init); | |
3455 | module_exit(isert_exit); |