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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
b8d26b3b NB |
2 | /******************************************************************************* |
3 | * This file contains iSCSI extentions for RDMA (iSER) Verbs | |
4 | * | |
4c76251e | 5 | * (c) Copyright 2013 Datera, Inc. |
b8d26b3b NB |
6 | * |
7 | * Nicholas A. Bellinger <nab@linux-iscsi.org> | |
8 | * | |
b8d26b3b NB |
9 | ****************************************************************************/ |
10 | ||
11 | #include <linux/string.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/scatterlist.h> | |
14 | #include <linux/socket.h> | |
15 | #include <linux/in.h> | |
16 | #include <linux/in6.h> | |
17 | #include <rdma/ib_verbs.h> | |
8094ba0a | 18 | #include <rdma/ib_cm.h> |
b8d26b3b NB |
19 | #include <rdma/rdma_cm.h> |
20 | #include <target/target_core_base.h> | |
21 | #include <target/target_core_fabric.h> | |
22 | #include <target/iscsi/iscsi_transport.h> | |
531b7bf4 | 23 | #include <linux/semaphore.h> |
b8d26b3b | 24 | |
b8d26b3b NB |
25 | #include "ib_isert.h" |
26 | ||
45678b6b | 27 | static int isert_debug_level; |
24f412dd SG |
28 | module_param_named(debug_level, isert_debug_level, int, 0644); |
29 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)"); | |
30 | ||
dae7a75f MG |
31 | static int isert_sg_tablesize_set(const char *val, |
32 | const struct kernel_param *kp); | |
33 | static const struct kernel_param_ops sg_tablesize_ops = { | |
34 | .set = isert_sg_tablesize_set, | |
35 | .get = param_get_int, | |
36 | }; | |
37 | ||
109d19a5 | 38 | static int isert_sg_tablesize = ISCSI_ISER_MIN_SG_TABLESIZE; |
dae7a75f MG |
39 | module_param_cb(sg_tablesize, &sg_tablesize_ops, &isert_sg_tablesize, 0644); |
40 | MODULE_PARM_DESC(sg_tablesize, | |
109d19a5 | 41 | "Number of gather/scatter entries in a single scsi command, should >= 128 (default: 128, max: 4096)"); |
dae7a75f | 42 | |
b8d26b3b NB |
43 | static DEFINE_MUTEX(device_list_mutex); |
44 | static LIST_HEAD(device_list); | |
549f39a5 | 45 | static struct workqueue_struct *isert_login_wq; |
b8d26b3b | 46 | static struct workqueue_struct *isert_comp_wq; |
b02efbfc | 47 | static struct workqueue_struct *isert_release_wq; |
b8d26b3b | 48 | |
f93f3a70 | 49 | static int |
be36d683 | 50 | isert_put_response(struct iscsit_conn *conn, struct iscsit_cmd *cmd); |
2371e5da | 51 | static int |
9679cc51 | 52 | isert_login_post_recv(struct isert_conn *isert_conn); |
2371e5da SG |
53 | static int |
54 | isert_rdma_accept(struct isert_conn *isert_conn); | |
ca6c1d82 | 55 | struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); |
d40945d8 | 56 | |
2f1b6b7d | 57 | static void isert_release_work(struct work_struct *work); |
9679cc51 CH |
58 | static void isert_recv_done(struct ib_cq *cq, struct ib_wc *wc); |
59 | static void isert_send_done(struct ib_cq *cq, struct ib_wc *wc); | |
60 | static void isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc); | |
61 | static void isert_login_send_done(struct ib_cq *cq, struct ib_wc *wc); | |
2f1b6b7d | 62 | |
dae7a75f MG |
63 | static int isert_sg_tablesize_set(const char *val, const struct kernel_param *kp) |
64 | { | |
65 | int n = 0, ret; | |
66 | ||
67 | ret = kstrtoint(val, 10, &n); | |
68 | if (ret != 0 || n < ISCSI_ISER_MIN_SG_TABLESIZE || | |
69 | n > ISCSI_ISER_MAX_SG_TABLESIZE) | |
70 | return -EINVAL; | |
71 | ||
72 | return param_set_int(val, kp); | |
73 | } | |
74 | ||
302cc7c3 SG |
75 | static inline bool |
76 | isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) | |
77 | { | |
23a548ee | 78 | return (conn->pi_support && |
302cc7c3 SG |
79 | cmd->prot_op != TARGET_PROT_NORMAL); |
80 | } | |
81 | ||
b8d26b3b NB |
82 | static void |
83 | isert_qp_event_callback(struct ib_event *e, void *context) | |
84 | { | |
6700425e | 85 | struct isert_conn *isert_conn = context; |
b8d26b3b | 86 | |
ea8a1616 SG |
87 | isert_err("%s (%d): conn %p\n", |
88 | ib_event_msg(e->event), e->event, isert_conn); | |
89 | ||
b8d26b3b NB |
90 | switch (e->event) { |
91 | case IB_EVENT_COMM_EST: | |
dac6ab30 | 92 | rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST); |
b8d26b3b NB |
93 | break; |
94 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
4c22e07f | 95 | isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); |
b8d26b3b NB |
96 | break; |
97 | default: | |
98 | break; | |
99 | } | |
100 | } | |
101 | ||
40fc069a SG |
102 | static struct ib_qp * |
103 | isert_create_qp(struct isert_conn *isert_conn, | |
40fc069a SG |
104 | struct rdma_cm_id *cma_id) |
105 | { | |
c6e66307 | 106 | u32 cq_size = ISERT_QP_MAX_REQ_DTOS + ISERT_QP_MAX_RECV_DTOS + 2; |
dac6ab30 | 107 | struct isert_device *device = isert_conn->device; |
c6e66307 | 108 | struct ib_device *ib_dev = device->ib_device; |
40fc069a | 109 | struct ib_qp_init_attr attr; |
317000b9 | 110 | int ret, factor; |
b8d26b3b | 111 | |
c6e66307 YF |
112 | isert_conn->cq = ib_cq_pool_get(ib_dev, cq_size, -1, IB_POLL_WORKQUEUE); |
113 | if (IS_ERR(isert_conn->cq)) { | |
114 | isert_err("Unable to allocate cq\n"); | |
115 | ret = PTR_ERR(isert_conn->cq); | |
116 | return ERR_PTR(ret); | |
117 | } | |
118 | isert_conn->cq_size = cq_size; | |
119 | ||
b8d26b3b NB |
120 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); |
121 | attr.event_handler = isert_qp_event_callback; | |
122 | attr.qp_context = isert_conn; | |
c6e66307 YF |
123 | attr.send_cq = isert_conn->cq; |
124 | attr.recv_cq = isert_conn->cq; | |
572a1434 | 125 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS + 1; |
bdf20e72 | 126 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; |
317000b9 | 127 | factor = rdma_rw_mr_factor(device->ib_device, cma_id->port_num, |
dae7a75f | 128 | isert_sg_tablesize); |
317000b9 | 129 | attr.cap.max_rdma_ctxs = ISCSI_DEF_XMIT_CMDS_MAX * factor; |
33023fb8 | 130 | attr.cap.max_send_sge = device->ib_device->attrs.max_send_sge; |
b8d26b3b NB |
131 | attr.cap.max_recv_sge = 1; |
132 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
133 | attr.qp_type = IB_QPT_RC; | |
570db170 | 134 | if (device->pi_capable) |
c0a6cbb9 | 135 | attr.create_flags |= IB_QP_CREATE_INTEGRITY_EN; |
b8d26b3b | 136 | |
67cb3949 | 137 | ret = rdma_create_qp(cma_id, device->pd, &attr); |
b8d26b3b | 138 | if (ret) { |
24f412dd | 139 | isert_err("rdma_create_qp failed for cma_id %d\n", ret); |
c6e66307 YF |
140 | ib_cq_pool_put(isert_conn->cq, isert_conn->cq_size); |
141 | ||
40fc069a SG |
142 | return ERR_PTR(ret); |
143 | } | |
144 | ||
145 | return cma_id->qp; | |
146 | } | |
147 | ||
b8d26b3b NB |
148 | static int |
149 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
150 | { | |
dac6ab30 | 151 | struct isert_device *device = isert_conn->device; |
67cb3949 | 152 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
153 | struct iser_rx_desc *rx_desc; |
154 | struct ib_sge *rx_sg; | |
155 | u64 dma_addr; | |
156 | int i, j; | |
157 | ||
6396bb22 KC |
158 | isert_conn->rx_descs = kcalloc(ISERT_QP_MAX_RECV_DTOS, |
159 | sizeof(struct iser_rx_desc), | |
160 | GFP_KERNEL); | |
dac6ab30 | 161 | if (!isert_conn->rx_descs) |
93b80f29 | 162 | return -ENOMEM; |
b8d26b3b | 163 | |
dac6ab30 | 164 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
165 | |
166 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
0b089c1e SG |
167 | dma_addr = ib_dma_map_single(ib_dev, rx_desc->buf, |
168 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
169 | if (ib_dma_mapping_error(ib_dev, dma_addr)) |
170 | goto dma_map_fail; | |
171 | ||
172 | rx_desc->dma_addr = dma_addr; | |
173 | ||
174 | rx_sg = &rx_desc->rx_sg; | |
0b089c1e | 175 | rx_sg->addr = rx_desc->dma_addr + isert_get_hdr_offset(rx_desc); |
b8d26b3b | 176 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; |
34efc7df | 177 | rx_sg->lkey = device->pd->local_dma_lkey; |
9679cc51 | 178 | rx_desc->rx_cqe.done = isert_recv_done; |
b8d26b3b NB |
179 | } |
180 | ||
b8d26b3b NB |
181 | return 0; |
182 | ||
183 | dma_map_fail: | |
dac6ab30 | 184 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
185 | for (j = 0; j < i; j++, rx_desc++) { |
186 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
0b089c1e | 187 | ISER_RX_SIZE, DMA_FROM_DEVICE); |
b8d26b3b | 188 | } |
dac6ab30 SG |
189 | kfree(isert_conn->rx_descs); |
190 | isert_conn->rx_descs = NULL; | |
4c22e07f | 191 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
b8d26b3b NB |
192 | return -ENOMEM; |
193 | } | |
194 | ||
195 | static void | |
196 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
197 | { | |
dac6ab30 | 198 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
199 | struct iser_rx_desc *rx_desc; |
200 | int i; | |
201 | ||
dac6ab30 | 202 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
203 | return; |
204 | ||
dac6ab30 | 205 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
206 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
207 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
0b089c1e | 208 | ISER_RX_SIZE, DMA_FROM_DEVICE); |
b8d26b3b NB |
209 | } |
210 | ||
dac6ab30 SG |
211 | kfree(isert_conn->rx_descs); |
212 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
213 | } |
214 | ||
172369c5 SG |
215 | static int |
216 | isert_create_device_ib_res(struct isert_device *device) | |
217 | { | |
4a061b28 | 218 | struct ib_device *ib_dev = device->ib_device; |
fd8205e8 | 219 | int ret; |
172369c5 | 220 | |
33023fb8 SW |
221 | isert_dbg("devattr->max_send_sge: %d devattr->max_recv_sge %d\n", |
222 | ib_dev->attrs.max_send_sge, ib_dev->attrs.max_recv_sge); | |
4a061b28 | 223 | isert_dbg("devattr->max_sge_rd: %d\n", ib_dev->attrs.max_sge_rd); |
172369c5 | 224 | |
ed082d36 | 225 | device->pd = ib_alloc_pd(ib_dev, 0); |
67cb3949 SG |
226 | if (IS_ERR(device->pd)) { |
227 | ret = PTR_ERR(device->pd); | |
228 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
229 | device, ret); | |
c6e66307 | 230 | return ret; |
67cb3949 SG |
231 | } |
232 | ||
172369c5 | 233 | /* Check signature cap */ |
e945c653 | 234 | if (ib_dev->attrs.kernel_cap_flags & IBK_INTEGRITY_HANDOVER) |
a6dc16b6 MG |
235 | device->pi_capable = true; |
236 | else | |
237 | device->pi_capable = false; | |
67cb3949 | 238 | |
b8d26b3b | 239 | return 0; |
b8d26b3b NB |
240 | } |
241 | ||
242 | static void | |
243 | isert_free_device_ib_res(struct isert_device *device) | |
244 | { | |
24f412dd | 245 | isert_info("device %p\n", device); |
b8d26b3b | 246 | |
67cb3949 | 247 | ib_dealloc_pd(device->pd); |
b8d26b3b NB |
248 | } |
249 | ||
250 | static void | |
cf8ae958 | 251 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
252 | { |
253 | mutex_lock(&device_list_mutex); | |
254 | device->refcount--; | |
4c22e07f | 255 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
256 | if (!device->refcount) { |
257 | isert_free_device_ib_res(device); | |
258 | list_del(&device->dev_node); | |
259 | kfree(device); | |
260 | } | |
261 | mutex_unlock(&device_list_mutex); | |
262 | } | |
263 | ||
264 | static struct isert_device * | |
cf8ae958 | 265 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
266 | { |
267 | struct isert_device *device; | |
268 | int ret; | |
269 | ||
270 | mutex_lock(&device_list_mutex); | |
271 | list_for_each_entry(device, &device_list, dev_node) { | |
272 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
273 | device->refcount++; | |
4c22e07f SG |
274 | isert_info("Found iser device %p refcount %d\n", |
275 | device, device->refcount); | |
b8d26b3b NB |
276 | mutex_unlock(&device_list_mutex); |
277 | return device; | |
278 | } | |
279 | } | |
280 | ||
281 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
282 | if (!device) { | |
283 | mutex_unlock(&device_list_mutex); | |
284 | return ERR_PTR(-ENOMEM); | |
285 | } | |
286 | ||
287 | INIT_LIST_HEAD(&device->dev_node); | |
288 | ||
289 | device->ib_device = cma_id->device; | |
290 | ret = isert_create_device_ib_res(device); | |
291 | if (ret) { | |
292 | kfree(device); | |
293 | mutex_unlock(&device_list_mutex); | |
294 | return ERR_PTR(ret); | |
295 | } | |
296 | ||
297 | device->refcount++; | |
298 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
299 | isert_info("Created a new iser device %p refcount %d\n", |
300 | device, device->refcount); | |
b8d26b3b NB |
301 | mutex_unlock(&device_list_mutex); |
302 | ||
303 | return device; | |
304 | } | |
305 | ||
ae9ea9ed SG |
306 | static void |
307 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 308 | { |
b8d26b3b | 309 | isert_conn->state = ISER_CONN_INIT; |
bd379220 | 310 | INIT_LIST_HEAD(&isert_conn->node); |
dac6ab30 | 311 | init_completion(&isert_conn->login_comp); |
2371e5da | 312 | init_completion(&isert_conn->login_req_comp); |
63b268d2 | 313 | init_waitqueue_head(&isert_conn->rem_wait); |
dac6ab30 SG |
314 | kref_init(&isert_conn->kref); |
315 | mutex_init(&isert_conn->mutex); | |
2f1b6b7d | 316 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
ae9ea9ed | 317 | } |
b8d26b3b | 318 | |
ae9ea9ed SG |
319 | static void |
320 | isert_free_login_buf(struct isert_conn *isert_conn) | |
321 | { | |
dac6ab30 | 322 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
323 | |
324 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
ed1083b2 | 325 | ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE); |
5adabdd1 CH |
326 | kfree(isert_conn->login_rsp_buf); |
327 | ||
0b089c1e SG |
328 | ib_dma_unmap_single(ib_dev, isert_conn->login_desc->dma_addr, |
329 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
330 | kfree(isert_conn->login_desc); | |
ae9ea9ed SG |
331 | } |
332 | ||
333 | static int | |
334 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
335 | struct ib_device *ib_dev) | |
336 | { | |
337 | int ret; | |
b8d26b3b | 338 | |
0b089c1e | 339 | isert_conn->login_desc = kzalloc(sizeof(*isert_conn->login_desc), |
5adabdd1 | 340 | GFP_KERNEL); |
0b089c1e | 341 | if (!isert_conn->login_desc) |
ae9ea9ed | 342 | return -ENOMEM; |
b8d26b3b | 343 | |
0b089c1e SG |
344 | isert_conn->login_desc->dma_addr = ib_dma_map_single(ib_dev, |
345 | isert_conn->login_desc->buf, | |
346 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
347 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_desc->dma_addr); | |
b8d26b3b | 348 | if (ret) { |
0b089c1e SG |
349 | isert_err("login_desc dma mapping error: %d\n", ret); |
350 | isert_conn->login_desc->dma_addr = 0; | |
351 | goto out_free_login_desc; | |
5adabdd1 CH |
352 | } |
353 | ||
354 | isert_conn->login_rsp_buf = kzalloc(ISER_RX_PAYLOAD_SIZE, GFP_KERNEL); | |
355 | if (!isert_conn->login_rsp_buf) { | |
1d5840c9 | 356 | ret = -ENOMEM; |
0b089c1e | 357 | goto out_unmap_login_desc; |
b8d26b3b NB |
358 | } |
359 | ||
360 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
5adabdd1 | 361 | isert_conn->login_rsp_buf, |
ed1083b2 | 362 | ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE); |
b8d26b3b NB |
363 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); |
364 | if (ret) { | |
ae9ea9ed | 365 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b | 366 | isert_conn->login_rsp_dma = 0; |
5adabdd1 | 367 | goto out_free_login_rsp_buf; |
b8d26b3b NB |
368 | } |
369 | ||
ae9ea9ed SG |
370 | return 0; |
371 | ||
5adabdd1 CH |
372 | out_free_login_rsp_buf: |
373 | kfree(isert_conn->login_rsp_buf); | |
0b089c1e SG |
374 | out_unmap_login_desc: |
375 | ib_dma_unmap_single(ib_dev, isert_conn->login_desc->dma_addr, | |
376 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
377 | out_free_login_desc: | |
378 | kfree(isert_conn->login_desc); | |
ae9ea9ed SG |
379 | return ret; |
380 | } | |
381 | ||
422bd0ac JD |
382 | static void |
383 | isert_set_nego_params(struct isert_conn *isert_conn, | |
384 | struct rdma_conn_param *param) | |
385 | { | |
386 | struct ib_device_attr *attr = &isert_conn->device->ib_device->attrs; | |
387 | ||
388 | /* Set max inflight RDMA READ requests */ | |
389 | isert_conn->initiator_depth = min_t(u8, param->initiator_depth, | |
390 | attr->max_qp_init_rd_atom); | |
391 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); | |
392 | ||
393 | if (param->private_data) { | |
394 | u8 flags = *(u8 *)param->private_data; | |
395 | ||
396 | /* | |
397 | * use remote invalidation if the both initiator | |
398 | * and the HCA support it | |
399 | */ | |
400 | isert_conn->snd_w_inv = !(flags & ISER_SEND_W_INV_NOT_SUP) && | |
401 | (attr->device_cap_flags & | |
402 | IB_DEVICE_MEM_MGT_EXTENSIONS); | |
403 | if (isert_conn->snd_w_inv) | |
404 | isert_info("Using remote invalidation\n"); | |
405 | } | |
406 | } | |
407 | ||
c6e66307 YF |
408 | static void |
409 | isert_destroy_qp(struct isert_conn *isert_conn) | |
410 | { | |
411 | ib_destroy_qp(isert_conn->qp); | |
412 | ib_cq_pool_put(isert_conn->cq, isert_conn->cq_size); | |
413 | } | |
414 | ||
ae9ea9ed SG |
415 | static int |
416 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
417 | { | |
418 | struct isert_np *isert_np = cma_id->context; | |
419 | struct iscsi_np *np = isert_np->np; | |
420 | struct isert_conn *isert_conn; | |
421 | struct isert_device *device; | |
422 | int ret = 0; | |
423 | ||
424 | spin_lock_bh(&np->np_thread_lock); | |
425 | if (!np->enabled) { | |
426 | spin_unlock_bh(&np->np_thread_lock); | |
427 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
8094ba0a | 428 | return rdma_reject(cma_id, NULL, 0, IB_CM_REJ_CONSUMER_DEFINED); |
ae9ea9ed SG |
429 | } |
430 | spin_unlock_bh(&np->np_thread_lock); | |
431 | ||
432 | isert_dbg("cma_id: %p, portal: %p\n", | |
433 | cma_id, cma_id->context); | |
434 | ||
435 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
436 | if (!isert_conn) | |
437 | return -ENOMEM; | |
438 | ||
439 | isert_init_conn(isert_conn); | |
dac6ab30 | 440 | isert_conn->cm_id = cma_id; |
ae9ea9ed | 441 | |
cf8ae958 | 442 | device = isert_device_get(cma_id); |
b8d26b3b NB |
443 | if (IS_ERR(device)) { |
444 | ret = PTR_ERR(device); | |
adb76a52 | 445 | goto out; |
b8d26b3b | 446 | } |
dac6ab30 | 447 | isert_conn->device = device; |
b8d26b3b | 448 | |
adb76a52 LY |
449 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); |
450 | if (ret) | |
451 | goto out_conn_dev; | |
452 | ||
422bd0ac | 453 | isert_set_nego_params(isert_conn, &event->param.conn); |
1a92e17e | 454 | |
c6e66307 YF |
455 | isert_conn->qp = isert_create_qp(isert_conn, cma_id); |
456 | if (IS_ERR(isert_conn->qp)) { | |
457 | ret = PTR_ERR(isert_conn->qp); | |
adb76a52 | 458 | goto out_rsp_dma_map; |
c6e66307 | 459 | } |
b8d26b3b | 460 | |
9679cc51 | 461 | ret = isert_login_post_recv(isert_conn); |
2371e5da | 462 | if (ret) |
c6e66307 | 463 | goto out_destroy_qp; |
2371e5da SG |
464 | |
465 | ret = isert_rdma_accept(isert_conn); | |
466 | if (ret) | |
c6e66307 | 467 | goto out_destroy_qp; |
2371e5da | 468 | |
ed8cb0a4 | 469 | mutex_lock(&isert_np->mutex); |
bd379220 | 470 | list_add_tail(&isert_conn->node, &isert_np->accepted); |
ed8cb0a4 | 471 | mutex_unlock(&isert_np->mutex); |
b8d26b3b | 472 | |
b8d26b3b NB |
473 | return 0; |
474 | ||
c6e66307 YF |
475 | out_destroy_qp: |
476 | isert_destroy_qp(isert_conn); | |
b8d26b3b | 477 | out_rsp_dma_map: |
ae9ea9ed | 478 | isert_free_login_buf(isert_conn); |
adb76a52 LY |
479 | out_conn_dev: |
480 | isert_device_put(device); | |
b8d26b3b NB |
481 | out: |
482 | kfree(isert_conn); | |
8094ba0a | 483 | rdma_reject(cma_id, NULL, 0, IB_CM_REJ_CONSUMER_DEFINED); |
b8d26b3b NB |
484 | return ret; |
485 | } | |
486 | ||
487 | static void | |
488 | isert_connect_release(struct isert_conn *isert_conn) | |
489 | { | |
dac6ab30 | 490 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 491 | |
4c22e07f | 492 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 493 | |
57df81e3 SG |
494 | BUG_ON(!device); |
495 | ||
19e2090f | 496 | isert_free_rx_descriptors(isert_conn); |
63b268d2 RR |
497 | if (isert_conn->cm_id && |
498 | !isert_conn->dev_removed) | |
dac6ab30 | 499 | rdma_destroy_id(isert_conn->cm_id); |
19e2090f | 500 | |
c6e66307 YF |
501 | if (isert_conn->qp) |
502 | isert_destroy_qp(isert_conn); | |
b8d26b3b | 503 | |
0b089c1e | 504 | if (isert_conn->login_desc) |
ae9ea9ed SG |
505 | isert_free_login_buf(isert_conn); |
506 | ||
57df81e3 | 507 | isert_device_put(device); |
b8d26b3b | 508 | |
63b268d2 RR |
509 | if (isert_conn->dev_removed) |
510 | wake_up_interruptible(&isert_conn->rem_wait); | |
511 | else | |
512 | kfree(isert_conn); | |
b8d26b3b NB |
513 | } |
514 | ||
515 | static void | |
516 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
517 | { | |
19e2090f | 518 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
bd379220 | 519 | struct isert_np *isert_np = cma_id->context; |
c2f88b17 | 520 | |
24f412dd | 521 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 522 | |
dac6ab30 | 523 | mutex_lock(&isert_conn->mutex); |
bd379220 JD |
524 | isert_conn->state = ISER_CONN_UP; |
525 | kref_get(&isert_conn->kref); | |
dac6ab30 | 526 | mutex_unlock(&isert_conn->mutex); |
bd379220 JD |
527 | |
528 | mutex_lock(&isert_np->mutex); | |
529 | list_move_tail(&isert_conn->node, &isert_np->pending); | |
530 | mutex_unlock(&isert_np->mutex); | |
531 | ||
532 | isert_info("np %p: Allow accept_np to continue\n", isert_np); | |
533 | up(&isert_np->sem); | |
b8d26b3b NB |
534 | } |
535 | ||
536 | static void | |
dac6ab30 | 537 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
538 | { |
539 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 540 | struct isert_conn, kref); |
b8d26b3b | 541 | |
4c22e07f SG |
542 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
543 | current->pid); | |
b8d26b3b NB |
544 | |
545 | isert_connect_release(isert_conn); | |
546 | } | |
547 | ||
548 | static void | |
549 | isert_put_conn(struct isert_conn *isert_conn) | |
550 | { | |
dac6ab30 | 551 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
552 | } |
553 | ||
6d1fba0c JD |
554 | static void |
555 | isert_handle_unbound_conn(struct isert_conn *isert_conn) | |
556 | { | |
557 | struct isert_np *isert_np = isert_conn->cm_id->context; | |
558 | ||
559 | mutex_lock(&isert_np->mutex); | |
560 | if (!list_empty(&isert_conn->node)) { | |
561 | /* | |
562 | * This means iscsi doesn't know this connection | |
563 | * so schedule a cleanup ourselves | |
564 | */ | |
565 | list_del_init(&isert_conn->node); | |
566 | isert_put_conn(isert_conn); | |
6d1fba0c JD |
567 | queue_work(isert_release_wq, &isert_conn->release_work); |
568 | } | |
569 | mutex_unlock(&isert_np->mutex); | |
570 | } | |
571 | ||
954f2372 SG |
572 | /** |
573 | * isert_conn_terminate() - Initiate connection termination | |
574 | * @isert_conn: isert connection struct | |
575 | * | |
576 | * Notes: | |
aea92980 | 577 | * In case the connection state is BOUND, move state |
954f2372 | 578 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 579 | * In case the connection state is UP, complete flush as well. |
954f2372 | 580 | * |
dac6ab30 | 581 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
582 | * safe to call multiple times. |
583 | */ | |
584 | static void | |
585 | isert_conn_terminate(struct isert_conn *isert_conn) | |
586 | { | |
587 | int err; | |
588 | ||
6d1fba0c JD |
589 | if (isert_conn->state >= ISER_CONN_TERMINATING) |
590 | return; | |
591 | ||
592 | isert_info("Terminating conn %p state %d\n", | |
593 | isert_conn, isert_conn->state); | |
594 | isert_conn->state = ISER_CONN_TERMINATING; | |
595 | err = rdma_disconnect(isert_conn->cm_id); | |
596 | if (err) | |
597 | isert_warn("Failed rdma_disconnect isert_conn %p\n", | |
598 | isert_conn); | |
954f2372 SG |
599 | } |
600 | ||
3b726ae2 | 601 | static int |
ca6c1d82 SG |
602 | isert_np_cma_handler(struct isert_np *isert_np, |
603 | enum rdma_cm_event_type event) | |
b8d26b3b | 604 | { |
ea8a1616 SG |
605 | isert_dbg("%s (%d): isert np %p\n", |
606 | rdma_event_msg(event), event, isert_np); | |
3b726ae2 | 607 | |
ca6c1d82 SG |
608 | switch (event) { |
609 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
ed8cb0a4 | 610 | isert_np->cm_id = NULL; |
ca6c1d82 SG |
611 | break; |
612 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
ed8cb0a4 JD |
613 | isert_np->cm_id = isert_setup_id(isert_np); |
614 | if (IS_ERR(isert_np->cm_id)) { | |
24f412dd | 615 | isert_err("isert np %p setup id failed: %ld\n", |
ed8cb0a4 JD |
616 | isert_np, PTR_ERR(isert_np->cm_id)); |
617 | isert_np->cm_id = NULL; | |
ca6c1d82 SG |
618 | } |
619 | break; | |
620 | default: | |
24f412dd | 621 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 622 | isert_np, event); |
3b726ae2 SG |
623 | } |
624 | ||
ca6c1d82 SG |
625 | return -1; |
626 | } | |
627 | ||
628 | static int | |
629 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
630 | enum rdma_cm_event_type event) | |
631 | { | |
f81bf458 | 632 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
ca6c1d82 | 633 | |
dac6ab30 | 634 | mutex_lock(&isert_conn->mutex); |
6d1fba0c JD |
635 | switch (isert_conn->state) { |
636 | case ISER_CONN_TERMINATING: | |
637 | break; | |
638 | case ISER_CONN_UP: | |
639 | isert_conn_terminate(isert_conn); | |
572a1434 | 640 | ib_drain_qp(isert_conn->qp); |
6d1fba0c JD |
641 | isert_handle_unbound_conn(isert_conn); |
642 | break; | |
643 | case ISER_CONN_BOUND: | |
644 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ | |
645 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
646 | break; | |
647 | default: | |
506f71d1 | 648 | isert_warn("conn %p terminating in state %d\n", |
6d1fba0c | 649 | isert_conn, isert_conn->state); |
2f1b6b7d | 650 | } |
6d1fba0c | 651 | mutex_unlock(&isert_conn->mutex); |
2f1b6b7d | 652 | |
3b726ae2 | 653 | return 0; |
b8d26b3b NB |
654 | } |
655 | ||
4a579da2 | 656 | static int |
954f2372 SG |
657 | isert_connect_error(struct rdma_cm_id *cma_id) |
658 | { | |
19e2090f | 659 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
7651e2d6 | 660 | struct isert_np *isert_np = cma_id->context; |
954f2372 | 661 | |
cd52cb26 | 662 | ib_drain_qp(isert_conn->qp); |
7651e2d6 SV |
663 | |
664 | mutex_lock(&isert_np->mutex); | |
bd379220 | 665 | list_del_init(&isert_conn->node); |
7651e2d6 | 666 | mutex_unlock(&isert_np->mutex); |
dac6ab30 | 667 | isert_conn->cm_id = NULL; |
954f2372 | 668 | isert_put_conn(isert_conn); |
4a579da2 SG |
669 | |
670 | return -1; | |
954f2372 SG |
671 | } |
672 | ||
b8d26b3b NB |
673 | static int |
674 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
675 | { | |
f81bf458 | 676 | struct isert_np *isert_np = cma_id->context; |
63b268d2 | 677 | struct isert_conn *isert_conn; |
b8d26b3b NB |
678 | int ret = 0; |
679 | ||
ea8a1616 SG |
680 | isert_info("%s (%d): status %d id %p np %p\n", |
681 | rdma_event_msg(event->event), event->event, | |
4c22e07f | 682 | event->status, cma_id, cma_id->context); |
b8d26b3b | 683 | |
f81bf458 JD |
684 | if (isert_np->cm_id == cma_id) |
685 | return isert_np_cma_handler(cma_id->context, event->event); | |
686 | ||
b8d26b3b NB |
687 | switch (event->event) { |
688 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
b8d26b3b | 689 | ret = isert_connect_request(cma_id, event); |
3b726ae2 | 690 | if (ret) |
4c22e07f | 691 | isert_err("failed handle connect request %d\n", ret); |
b8d26b3b NB |
692 | break; |
693 | case RDMA_CM_EVENT_ESTABLISHED: | |
b8d26b3b NB |
694 | isert_connected_handler(cma_id); |
695 | break; | |
df561f66 GS |
696 | case RDMA_CM_EVENT_ADDR_CHANGE: |
697 | case RDMA_CM_EVENT_DISCONNECTED: | |
88c4015f | 698 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 699 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 700 | break; |
63b268d2 RR |
701 | case RDMA_CM_EVENT_DEVICE_REMOVAL: |
702 | isert_conn = cma_id->qp->qp_context; | |
703 | isert_conn->dev_removed = true; | |
704 | isert_disconnected_handler(cma_id, event->event); | |
705 | wait_event_interruptible(isert_conn->rem_wait, | |
706 | isert_conn->state == ISER_CONN_DOWN); | |
707 | kfree(isert_conn); | |
708 | /* | |
709 | * return non-zero from the callback to destroy | |
710 | * the rdma cm id | |
711 | */ | |
712 | return 1; | |
d2271bd0 | 713 | case RDMA_CM_EVENT_REJECTED: |
1e38a366 SW |
714 | isert_info("Connection rejected: %s\n", |
715 | rdma_reject_msg(cma_id, event->status)); | |
df561f66 | 716 | fallthrough; |
d2271bd0 | 717 | case RDMA_CM_EVENT_UNREACHABLE: |
b8d26b3b | 718 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 719 | ret = isert_connect_error(cma_id); |
954f2372 | 720 | break; |
b8d26b3b | 721 | default: |
24f412dd | 722 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
723 | break; |
724 | } | |
725 | ||
b8d26b3b NB |
726 | return ret; |
727 | } | |
728 | ||
729 | static int | |
4366b19c | 730 | isert_post_recvm(struct isert_conn *isert_conn, u32 count) |
b8d26b3b | 731 | { |
e01a7674 | 732 | struct ib_recv_wr *rx_wr; |
b8d26b3b | 733 | int i, ret; |
b8d26b3b NB |
734 | struct iser_rx_desc *rx_desc; |
735 | ||
dac6ab30 | 736 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
4366b19c | 737 | rx_desc = &isert_conn->rx_descs[i]; |
9679cc51 CH |
738 | |
739 | rx_wr->wr_cqe = &rx_desc->rx_cqe; | |
4366b19c JD |
740 | rx_wr->sg_list = &rx_desc->rx_sg; |
741 | rx_wr->num_sge = 1; | |
742 | rx_wr->next = rx_wr + 1; | |
7a56dc88 | 743 | rx_desc->in_use = false; |
b8d26b3b | 744 | } |
b8d26b3b NB |
745 | rx_wr--; |
746 | rx_wr->next = NULL; /* mark end of work requests list */ | |
747 | ||
e01a7674 | 748 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, NULL); |
6d1fba0c | 749 | if (ret) |
24f412dd | 750 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
4366b19c JD |
751 | |
752 | return ret; | |
753 | } | |
754 | ||
755 | static int | |
756 | isert_post_recv(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc) | |
757 | { | |
e01a7674 | 758 | struct ib_recv_wr rx_wr; |
4366b19c JD |
759 | int ret; |
760 | ||
7a56dc88 SG |
761 | if (!rx_desc->in_use) { |
762 | /* | |
763 | * if the descriptor is not in-use we already reposted it | |
764 | * for recv, so just silently return | |
765 | */ | |
766 | return 0; | |
767 | } | |
768 | ||
769 | rx_desc->in_use = false; | |
9679cc51 | 770 | rx_wr.wr_cqe = &rx_desc->rx_cqe; |
4366b19c JD |
771 | rx_wr.sg_list = &rx_desc->rx_sg; |
772 | rx_wr.num_sge = 1; | |
773 | rx_wr.next = NULL; | |
774 | ||
e01a7674 | 775 | ret = ib_post_recv(isert_conn->qp, &rx_wr, NULL); |
6d1fba0c | 776 | if (ret) |
4366b19c | 777 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
4366b19c | 778 | |
b8d26b3b NB |
779 | return ret; |
780 | } | |
781 | ||
782 | static int | |
9679cc51 | 783 | isert_login_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) |
b8d26b3b | 784 | { |
dac6ab30 | 785 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e01a7674 | 786 | struct ib_send_wr send_wr; |
b8d26b3b NB |
787 | int ret; |
788 | ||
789 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
790 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
791 | ||
9679cc51 CH |
792 | tx_desc->tx_cqe.done = isert_login_send_done; |
793 | ||
b8d26b3b | 794 | send_wr.next = NULL; |
9679cc51 | 795 | send_wr.wr_cqe = &tx_desc->tx_cqe; |
b8d26b3b NB |
796 | send_wr.sg_list = tx_desc->tx_sg; |
797 | send_wr.num_sge = tx_desc->num_sge; | |
798 | send_wr.opcode = IB_WR_SEND; | |
799 | send_wr.send_flags = IB_SEND_SIGNALED; | |
800 | ||
e01a7674 | 801 | ret = ib_post_send(isert_conn->qp, &send_wr, NULL); |
bdf20e72 | 802 | if (ret) |
24f412dd | 803 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
804 | |
805 | return ret; | |
806 | } | |
807 | ||
808 | static void | |
763b6965 AE |
809 | __isert_create_send_desc(struct isert_device *device, |
810 | struct iser_tx_desc *tx_desc) | |
b8d26b3b | 811 | { |
b8d26b3b | 812 | |
d3cf81f9 SG |
813 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_ctrl)); |
814 | tx_desc->iser_header.flags = ISCSI_CTRL; | |
b8d26b3b NB |
815 | |
816 | tx_desc->num_sge = 1; | |
b8d26b3b | 817 | |
34efc7df JG |
818 | if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) { |
819 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; | |
24f412dd | 820 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
821 | } |
822 | } | |
823 | ||
763b6965 AE |
824 | static void |
825 | isert_create_send_desc(struct isert_conn *isert_conn, | |
826 | struct isert_cmd *isert_cmd, | |
827 | struct iser_tx_desc *tx_desc) | |
828 | { | |
829 | struct isert_device *device = isert_conn->device; | |
830 | struct ib_device *ib_dev = device->ib_device; | |
831 | ||
832 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
833 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
834 | ||
835 | __isert_create_send_desc(device, tx_desc); | |
836 | } | |
837 | ||
b8d26b3b NB |
838 | static int |
839 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
840 | struct iser_tx_desc *tx_desc) | |
841 | { | |
dac6ab30 | 842 | struct isert_device *device = isert_conn->device; |
67cb3949 | 843 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
844 | u64 dma_addr; |
845 | ||
846 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
847 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
848 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 849 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
850 | return -ENOMEM; |
851 | } | |
852 | ||
853 | tx_desc->dma_addr = dma_addr; | |
854 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
855 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
34efc7df | 856 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; |
b8d26b3b | 857 | |
4c22e07f SG |
858 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
859 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
860 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
861 | |
862 | return 0; | |
863 | } | |
864 | ||
865 | static void | |
95b60f07 | 866 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 867 | struct ib_send_wr *send_wr) |
b8d26b3b | 868 | { |
95b60f07 NB |
869 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
870 | ||
9679cc51 CH |
871 | tx_desc->tx_cqe.done = isert_send_done; |
872 | send_wr->wr_cqe = &tx_desc->tx_cqe; | |
422bd0ac JD |
873 | |
874 | if (isert_conn->snd_w_inv && isert_cmd->inv_rkey) { | |
875 | send_wr->opcode = IB_WR_SEND_WITH_INV; | |
876 | send_wr->ex.invalidate_rkey = isert_cmd->inv_rkey; | |
877 | } else { | |
878 | send_wr->opcode = IB_WR_SEND; | |
879 | } | |
880 | ||
95b60f07 | 881 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 882 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 883 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
884 | } |
885 | ||
886 | static int | |
9679cc51 | 887 | isert_login_post_recv(struct isert_conn *isert_conn) |
b8d26b3b | 888 | { |
e01a7674 | 889 | struct ib_recv_wr rx_wr; |
b8d26b3b NB |
890 | struct ib_sge sge; |
891 | int ret; | |
892 | ||
893 | memset(&sge, 0, sizeof(struct ib_sge)); | |
0b089c1e SG |
894 | sge.addr = isert_conn->login_desc->dma_addr + |
895 | isert_get_hdr_offset(isert_conn->login_desc); | |
ed1083b2 | 896 | sge.length = ISER_RX_PAYLOAD_SIZE; |
34efc7df | 897 | sge.lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b | 898 | |
24f412dd | 899 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
900 | sge.addr, sge.length, sge.lkey); |
901 | ||
0b089c1e | 902 | isert_conn->login_desc->rx_cqe.done = isert_login_recv_done; |
9679cc51 | 903 | |
b8d26b3b | 904 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); |
0b089c1e | 905 | rx_wr.wr_cqe = &isert_conn->login_desc->rx_cqe; |
b8d26b3b NB |
906 | rx_wr.sg_list = &sge; |
907 | rx_wr.num_sge = 1; | |
908 | ||
e01a7674 | 909 | ret = ib_post_recv(isert_conn->qp, &rx_wr, NULL); |
6d1fba0c | 910 | if (ret) |
24f412dd | 911 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b | 912 | |
b8d26b3b NB |
913 | return ret; |
914 | } | |
915 | ||
916 | static int | |
be36d683 | 917 | isert_put_login_tx(struct iscsit_conn *conn, struct iscsi_login *login, |
b8d26b3b NB |
918 | u32 length) |
919 | { | |
920 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 921 | struct isert_device *device = isert_conn->device; |
67cb3949 | 922 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 923 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
924 | int ret; |
925 | ||
763b6965 | 926 | __isert_create_send_desc(device, tx_desc); |
b8d26b3b NB |
927 | |
928 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
929 | sizeof(struct iscsi_hdr)); | |
930 | ||
931 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
932 | ||
933 | if (length > 0) { | |
934 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
935 | ||
936 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
937 | length, DMA_TO_DEVICE); | |
938 | ||
939 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
940 | ||
941 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
942 | length, DMA_TO_DEVICE); | |
943 | ||
944 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
945 | tx_dsg->length = length; | |
34efc7df | 946 | tx_dsg->lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b NB |
947 | tx_desc->num_sge = 2; |
948 | } | |
949 | if (!login->login_failed) { | |
950 | if (login->login_complete) { | |
951 | ret = isert_alloc_rx_descriptors(isert_conn); | |
952 | if (ret) | |
953 | return ret; | |
954 | ||
4366b19c JD |
955 | ret = isert_post_recvm(isert_conn, |
956 | ISERT_QP_MAX_RECV_DTOS); | |
b8d26b3b NB |
957 | if (ret) |
958 | return ret; | |
959 | ||
128e9cc8 | 960 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 961 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 962 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 963 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
964 | goto post_send; |
965 | } | |
966 | ||
9679cc51 | 967 | ret = isert_login_post_recv(isert_conn); |
b8d26b3b NB |
968 | if (ret) |
969 | return ret; | |
970 | } | |
971 | post_send: | |
9679cc51 | 972 | ret = isert_login_post_send(isert_conn, tx_desc); |
b8d26b3b NB |
973 | if (ret) |
974 | return ret; | |
975 | ||
976 | return 0; | |
977 | } | |
978 | ||
979 | static void | |
2371e5da | 980 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 981 | { |
0b089c1e | 982 | struct iser_rx_desc *rx_desc = isert_conn->login_desc; |
2371e5da | 983 | int rx_buflen = isert_conn->login_req_len; |
be36d683 | 984 | struct iscsit_conn *conn = isert_conn->conn; |
b8d26b3b NB |
985 | struct iscsi_login *login = conn->conn_login; |
986 | int size; | |
987 | ||
24f412dd | 988 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
989 | |
990 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
991 | |
992 | if (login->first_request) { | |
993 | struct iscsi_login_req *login_req = | |
0b089c1e | 994 | (struct iscsi_login_req *)isert_get_iscsi_hdr(rx_desc); |
b8d26b3b NB |
995 | /* |
996 | * Setup the initial iscsi_login values from the leading | |
997 | * login request PDU. | |
998 | */ | |
999 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
2a402120 ML |
1000 | login->current_stage = ISCSI_LOGIN_CURRENT_STAGE( |
1001 | login_req->flags); | |
b8d26b3b NB |
1002 | login->version_min = login_req->min_version; |
1003 | login->version_max = login_req->max_version; | |
1004 | memcpy(login->isid, login_req->isid, 6); | |
1005 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1006 | login->init_task_tag = login_req->itt; | |
1007 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1008 | login->cid = be16_to_cpu(login_req->cid); | |
1009 | login->tsih = be16_to_cpu(login_req->tsih); | |
1010 | } | |
1011 | ||
0b089c1e | 1012 | memcpy(&login->req[0], isert_get_iscsi_hdr(rx_desc), ISCSI_HDR_LEN); |
b8d26b3b NB |
1013 | |
1014 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1015 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1016 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1017 | MAX_KEY_VALUE_PAIRS); | |
0b089c1e | 1018 | memcpy(login->req_buf, isert_get_data(rx_desc), size); |
b8d26b3b | 1019 | |
6faaa85f | 1020 | if (login->first_request) { |
dac6ab30 | 1021 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1022 | return; |
1023 | } | |
549f39a5 | 1024 | queue_delayed_work(isert_login_wq, &conn->login_work, 0); |
b8d26b3b NB |
1025 | } |
1026 | ||
66cd9d4e | 1027 | static struct iscsit_cmd |
be36d683 | 1028 | *isert_allocate_cmd(struct iscsit_conn *conn, struct iser_rx_desc *rx_desc) |
b8d26b3b | 1029 | { |
6700425e | 1030 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1031 | struct isert_cmd *isert_cmd; |
66cd9d4e | 1032 | struct iscsit_cmd *cmd; |
b8d26b3b | 1033 | |
676687c6 | 1034 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1035 | if (!cmd) { |
66cd9d4e | 1036 | isert_err("Unable to allocate iscsit_cmd + isert_cmd\n"); |
b8d26b3b NB |
1037 | return NULL; |
1038 | } | |
d703ce2f | 1039 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1040 | isert_cmd->conn = isert_conn; |
66cd9d4e | 1041 | isert_cmd->iscsit_cmd = cmd; |
4366b19c | 1042 | isert_cmd->rx_desc = rx_desc; |
b8d26b3b | 1043 | |
d703ce2f | 1044 | return cmd; |
b8d26b3b NB |
1045 | } |
1046 | ||
1047 | static int | |
1048 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
66cd9d4e | 1049 | struct isert_cmd *isert_cmd, struct iscsit_cmd *cmd, |
d703ce2f | 1050 | struct iser_rx_desc *rx_desc, unsigned char *buf) |
b8d26b3b | 1051 | { |
be36d683 | 1052 | struct iscsit_conn *conn = isert_conn->conn; |
b8d26b3b | 1053 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; |
b8d26b3b NB |
1054 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; |
1055 | bool dump_payload = false; | |
9fd60088 | 1056 | unsigned int data_len; |
b8d26b3b NB |
1057 | |
1058 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1059 | if (rc < 0) | |
1060 | return rc; | |
1061 | ||
1062 | imm_data = cmd->immediate_data; | |
1063 | imm_data_len = cmd->first_burst_len; | |
1064 | unsol_data = cmd->unsolicited_data; | |
9fd60088 | 1065 | data_len = cmd->se_cmd.data_length; |
b8d26b3b | 1066 | |
9fd60088 JD |
1067 | if (imm_data && imm_data_len == data_len) |
1068 | cmd->se_cmd.se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
b8d26b3b NB |
1069 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); |
1070 | if (rc < 0) { | |
1071 | return 0; | |
1072 | } else if (rc > 0) { | |
1073 | dump_payload = true; | |
1074 | goto sequence_cmd; | |
1075 | } | |
1076 | ||
1077 | if (!imm_data) | |
1078 | return 0; | |
1079 | ||
9fd60088 JD |
1080 | if (imm_data_len != data_len) { |
1081 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1082 | sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents, | |
0b089c1e | 1083 | isert_get_data(rx_desc), imm_data_len); |
9fd60088 JD |
1084 | isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n", |
1085 | sg_nents, imm_data_len); | |
1086 | } else { | |
1087 | sg_init_table(&isert_cmd->sg, 1); | |
1088 | cmd->se_cmd.t_data_sg = &isert_cmd->sg; | |
1089 | cmd->se_cmd.t_data_nents = 1; | |
0b089c1e SG |
1090 | sg_set_buf(&isert_cmd->sg, isert_get_data(rx_desc), |
1091 | imm_data_len); | |
9fd60088 JD |
1092 | isert_dbg("Transfer Immediate imm_data_len: %d\n", |
1093 | imm_data_len); | |
1094 | } | |
b8d26b3b NB |
1095 | |
1096 | cmd->write_data_done += imm_data_len; | |
1097 | ||
1098 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1099 | spin_lock_bh(&cmd->istate_lock); | |
1100 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1101 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1102 | spin_unlock_bh(&cmd->istate_lock); | |
1103 | } | |
1104 | ||
1105 | sequence_cmd: | |
561bf158 | 1106 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b | 1107 | |
f7a95c90 | 1108 | if (!rc && !dump_payload && unsol_data) |
0300b114 | 1109 | iscsit_set_unsolicited_dataout(cmd); |
6cc44a6f | 1110 | else if (dump_payload && imm_data) |
afc16604 | 1111 | target_put_sess_cmd(&cmd->se_cmd); |
b8d26b3b | 1112 | |
b8d26b3b NB |
1113 | return 0; |
1114 | } | |
1115 | ||
1116 | static int | |
1117 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1118 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1119 | { | |
1120 | struct scatterlist *sg_start; | |
be36d683 | 1121 | struct iscsit_conn *conn = isert_conn->conn; |
66cd9d4e | 1122 | struct iscsit_cmd *cmd = NULL; |
b8d26b3b NB |
1123 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
1124 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1125 | int rc, sg_nents, sg_off, page_off; | |
1126 | ||
1127 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1128 | if (rc < 0) | |
1129 | return rc; | |
1130 | else if (!cmd) | |
1131 | return 0; | |
1132 | /* | |
1133 | * FIXME: Unexpected unsolicited_data out | |
1134 | */ | |
1135 | if (!cmd->unsolicited_data) { | |
24f412dd | 1136 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1137 | dump_stack(); |
1138 | return -1; | |
1139 | } | |
1140 | ||
4c22e07f SG |
1141 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1142 | "write_data_done: %u, data_length: %u\n", | |
1143 | unsol_data_len, cmd->write_data_done, | |
1144 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1145 | |
1146 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1147 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1148 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1149 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1150 | /* | |
1151 | * FIXME: Non page-aligned unsolicited_data out | |
1152 | */ | |
1153 | if (page_off) { | |
4c22e07f | 1154 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1155 | dump_stack(); |
1156 | return -1; | |
1157 | } | |
4c22e07f SG |
1158 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1159 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
0b089c1e | 1160 | sg_nents, isert_get_data(rx_desc), unsol_data_len); |
b8d26b3b | 1161 | |
0b089c1e | 1162 | sg_copy_from_buffer(sg_start, sg_nents, isert_get_data(rx_desc), |
b8d26b3b NB |
1163 | unsol_data_len); |
1164 | ||
1165 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1166 | if (rc < 0) | |
1167 | return rc; | |
1168 | ||
4366b19c JD |
1169 | /* |
1170 | * multiple data-outs on the same command can arrive - | |
1171 | * so post the buffer before hand | |
1172 | */ | |
c97119b6 | 1173 | return isert_post_recv(isert_conn, rx_desc); |
b8d26b3b NB |
1174 | } |
1175 | ||
778de368 NB |
1176 | static int |
1177 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
66cd9d4e | 1178 | struct iscsit_cmd *cmd, struct iser_rx_desc *rx_desc, |
d703ce2f | 1179 | unsigned char *buf) |
778de368 | 1180 | { |
be36d683 | 1181 | struct iscsit_conn *conn = isert_conn->conn; |
778de368 NB |
1182 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; |
1183 | int rc; | |
1184 | ||
1185 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1186 | if (rc < 0) | |
1187 | return rc; | |
1188 | /* | |
1189 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1190 | */ | |
1191 | ||
1192 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1193 | } | |
1194 | ||
adb54c29 NB |
1195 | static int |
1196 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
66cd9d4e | 1197 | struct iscsit_cmd *cmd, struct iser_rx_desc *rx_desc, |
d703ce2f | 1198 | struct iscsi_text *hdr) |
adb54c29 | 1199 | { |
be36d683 | 1200 | struct iscsit_conn *conn = isert_conn->conn; |
adb54c29 NB |
1201 | u32 payload_length = ntoh24(hdr->dlength); |
1202 | int rc; | |
b44a2b67 | 1203 | unsigned char *text_in = NULL; |
adb54c29 NB |
1204 | |
1205 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1206 | if (rc < 0) | |
1207 | return rc; | |
1208 | ||
b44a2b67 SG |
1209 | if (payload_length) { |
1210 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
93b80f29 | 1211 | if (!text_in) |
b44a2b67 | 1212 | return -ENOMEM; |
adb54c29 NB |
1213 | } |
1214 | cmd->text_in_ptr = text_in; | |
1215 | ||
0b089c1e | 1216 | memcpy(cmd->text_in_ptr, isert_get_data(rx_desc), payload_length); |
adb54c29 NB |
1217 | |
1218 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1219 | } | |
1220 | ||
b8d26b3b NB |
1221 | static int |
1222 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1223 | uint32_t read_stag, uint64_t read_va, | |
1224 | uint32_t write_stag, uint64_t write_va) | |
1225 | { | |
0b089c1e | 1226 | struct iscsi_hdr *hdr = isert_get_iscsi_hdr(rx_desc); |
be36d683 | 1227 | struct iscsit_conn *conn = isert_conn->conn; |
66cd9d4e | 1228 | struct iscsit_cmd *cmd; |
b8d26b3b NB |
1229 | struct isert_cmd *isert_cmd; |
1230 | int ret = -EINVAL; | |
1231 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1232 | ||
fb140271 | 1233 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1234 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1235 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1236 | " ignoring\n", opcode); |
ca40d24e NB |
1237 | return 0; |
1238 | } | |
1239 | ||
b8d26b3b NB |
1240 | switch (opcode) { |
1241 | case ISCSI_OP_SCSI_CMD: | |
4366b19c | 1242 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1243 | if (!cmd) |
1244 | break; | |
1245 | ||
d703ce2f | 1246 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1247 | isert_cmd->read_stag = read_stag; |
1248 | isert_cmd->read_va = read_va; | |
1249 | isert_cmd->write_stag = write_stag; | |
1250 | isert_cmd->write_va = write_va; | |
422bd0ac | 1251 | isert_cmd->inv_rkey = read_stag ? read_stag : write_stag; |
b8d26b3b | 1252 | |
d703ce2f | 1253 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1254 | rx_desc, (unsigned char *)hdr); |
1255 | break; | |
1256 | case ISCSI_OP_NOOP_OUT: | |
4366b19c | 1257 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1258 | if (!cmd) |
1259 | break; | |
1260 | ||
d703ce2f NB |
1261 | isert_cmd = iscsit_priv_cmd(cmd); |
1262 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1263 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1264 | break; |
1265 | case ISCSI_OP_SCSI_DATA_OUT: | |
1266 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1267 | (unsigned char *)hdr); | |
1268 | break; | |
1269 | case ISCSI_OP_SCSI_TMFUNC: | |
4366b19c | 1270 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1271 | if (!cmd) |
1272 | break; | |
1273 | ||
1274 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1275 | (unsigned char *)hdr); | |
1276 | break; | |
1277 | case ISCSI_OP_LOGOUT: | |
4366b19c | 1278 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1279 | if (!cmd) |
1280 | break; | |
1281 | ||
1282 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1283 | break; |
adb54c29 | 1284 | case ISCSI_OP_TEXT: |
4366b19c | 1285 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) |
e4f4e801 | 1286 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); |
4366b19c JD |
1287 | else |
1288 | cmd = isert_allocate_cmd(conn, rx_desc); | |
1289 | ||
1290 | if (!cmd) | |
1291 | break; | |
adb54c29 | 1292 | |
d703ce2f NB |
1293 | isert_cmd = iscsit_priv_cmd(cmd); |
1294 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1295 | rx_desc, (struct iscsi_text *)hdr); |
1296 | break; | |
b8d26b3b | 1297 | default: |
24f412dd | 1298 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1299 | dump_stack(); |
1300 | break; | |
1301 | } | |
1302 | ||
1303 | return ret; | |
1304 | } | |
1305 | ||
1306 | static void | |
9679cc51 | 1307 | isert_print_wc(struct ib_wc *wc, const char *type) |
b8d26b3b | 1308 | { |
9679cc51 CH |
1309 | if (wc->status != IB_WC_WR_FLUSH_ERR) |
1310 | isert_err("%s failure: %s (%d) vend_err %x\n", type, | |
1311 | ib_wc_status_msg(wc->status), wc->status, | |
1312 | wc->vendor_err); | |
1313 | else | |
1314 | isert_dbg("%s failure: %s (%d)\n", type, | |
1315 | ib_wc_status_msg(wc->status), wc->status); | |
1316 | } | |
1317 | ||
1318 | static void | |
1319 | isert_recv_done(struct ib_cq *cq, struct ib_wc *wc) | |
1320 | { | |
1321 | struct isert_conn *isert_conn = wc->qp->qp_context; | |
1322 | struct ib_device *ib_dev = isert_conn->cm_id->device; | |
1323 | struct iser_rx_desc *rx_desc = cqe_to_rx_desc(wc->wr_cqe); | |
0b089c1e SG |
1324 | struct iscsi_hdr *hdr = isert_get_iscsi_hdr(rx_desc); |
1325 | struct iser_ctrl *iser_ctrl = isert_get_iser_hdr(rx_desc); | |
b8d26b3b NB |
1326 | uint64_t read_va = 0, write_va = 0; |
1327 | uint32_t read_stag = 0, write_stag = 0; | |
b8d26b3b | 1328 | |
9679cc51 CH |
1329 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1330 | isert_print_wc(wc, "recv"); | |
1331 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1332 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1333 | return; | |
1334 | } | |
1335 | ||
7a56dc88 SG |
1336 | rx_desc->in_use = true; |
1337 | ||
9679cc51 | 1338 | ib_dma_sync_single_for_cpu(ib_dev, rx_desc->dma_addr, |
0b089c1e | 1339 | ISER_RX_SIZE, DMA_FROM_DEVICE); |
9679cc51 CH |
1340 | |
1341 | isert_dbg("DMA: 0x%llx, iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", | |
1342 | rx_desc->dma_addr, hdr->opcode, hdr->itt, hdr->flags, | |
1343 | (int)(wc->byte_len - ISER_HEADERS_LEN)); | |
1344 | ||
d3cf81f9 | 1345 | switch (iser_ctrl->flags & 0xF0) { |
b8d26b3b | 1346 | case ISCSI_CTRL: |
d3cf81f9 SG |
1347 | if (iser_ctrl->flags & ISER_RSV) { |
1348 | read_stag = be32_to_cpu(iser_ctrl->read_stag); | |
1349 | read_va = be64_to_cpu(iser_ctrl->read_va); | |
4c22e07f SG |
1350 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1351 | read_stag, (unsigned long long)read_va); | |
b8d26b3b | 1352 | } |
d3cf81f9 SG |
1353 | if (iser_ctrl->flags & ISER_WSV) { |
1354 | write_stag = be32_to_cpu(iser_ctrl->write_stag); | |
1355 | write_va = be64_to_cpu(iser_ctrl->write_va); | |
4c22e07f SG |
1356 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1357 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1358 | } |
1359 | ||
24f412dd | 1360 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1361 | break; |
1362 | case ISER_HELLO: | |
24f412dd | 1363 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1364 | break; |
1365 | default: | |
d3cf81f9 | 1366 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_ctrl->flags); |
b8d26b3b NB |
1367 | break; |
1368 | } | |
1369 | ||
6c760b3d BVA |
1370 | isert_rx_opcode(isert_conn, rx_desc, |
1371 | read_stag, read_va, write_stag, write_va); | |
9679cc51 CH |
1372 | |
1373 | ib_dma_sync_single_for_device(ib_dev, rx_desc->dma_addr, | |
0b089c1e | 1374 | ISER_RX_SIZE, DMA_FROM_DEVICE); |
b8d26b3b NB |
1375 | } |
1376 | ||
1377 | static void | |
9679cc51 | 1378 | isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1379 | { |
9679cc51 | 1380 | struct isert_conn *isert_conn = wc->qp->qp_context; |
fce50a2f | 1381 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
9679cc51 CH |
1382 | |
1383 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
1384 | isert_print_wc(wc, "login recv"); | |
1385 | return; | |
b8d26b3b NB |
1386 | } |
1387 | ||
0b089c1e SG |
1388 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_desc->dma_addr, |
1389 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b | 1390 | |
9679cc51 | 1391 | isert_conn->login_req_len = wc->byte_len - ISER_HEADERS_LEN; |
b8d26b3b | 1392 | |
9679cc51 CH |
1393 | if (isert_conn->conn) { |
1394 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
2371e5da | 1395 | |
9679cc51 CH |
1396 | if (login && !login->first_request) |
1397 | isert_rx_login_req(isert_conn); | |
2371e5da | 1398 | } |
b8d26b3b | 1399 | |
9679cc51 CH |
1400 | mutex_lock(&isert_conn->mutex); |
1401 | complete(&isert_conn->login_req_comp); | |
1402 | mutex_unlock(&isert_conn->mutex); | |
b8d26b3b | 1403 | |
0b089c1e SG |
1404 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_desc->dma_addr, |
1405 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
1406 | } |
1407 | ||
1408 | static void | |
38a2d0d4 | 1409 | isert_rdma_rw_ctx_destroy(struct isert_cmd *cmd, struct isert_conn *conn) |
b8d26b3b | 1410 | { |
66cd9d4e | 1411 | struct se_cmd *se_cmd = &cmd->iscsit_cmd->se_cmd; |
38a2d0d4 | 1412 | enum dma_data_direction dir = target_reverse_dma_direction(se_cmd); |
b8d26b3b | 1413 | |
38a2d0d4 CH |
1414 | if (!cmd->rw.nr_ops) |
1415 | return; | |
59464ef4 | 1416 | |
38a2d0d4 CH |
1417 | if (isert_prot_cmd(conn, se_cmd)) { |
1418 | rdma_rw_ctx_destroy_signature(&cmd->rw, conn->qp, | |
1419 | conn->cm_id->port_num, se_cmd->t_data_sg, | |
1420 | se_cmd->t_data_nents, se_cmd->t_prot_sg, | |
1421 | se_cmd->t_prot_nents, dir); | |
1422 | } else { | |
1423 | rdma_rw_ctx_destroy(&cmd->rw, conn->qp, conn->cm_id->port_num, | |
1424 | se_cmd->t_data_sg, se_cmd->t_data_nents, dir); | |
59464ef4 VP |
1425 | } |
1426 | ||
38a2d0d4 | 1427 | cmd->rw.nr_ops = 0; |
59464ef4 VP |
1428 | } |
1429 | ||
b8d26b3b | 1430 | static void |
03e7848a | 1431 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1432 | { |
66cd9d4e | 1433 | struct iscsit_cmd *cmd = isert_cmd->iscsit_cmd; |
b8d26b3b | 1434 | struct isert_conn *isert_conn = isert_cmd->conn; |
be36d683 | 1435 | struct iscsit_conn *conn = isert_conn->conn; |
e4f4e801 | 1436 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1437 | |
4c22e07f | 1438 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1439 | |
1440 | switch (cmd->iscsi_opcode) { | |
1441 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1442 | spin_lock_bh(&conn->cmd_lock); |
1443 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1444 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1445 | spin_unlock_bh(&conn->cmd_lock); |
1446 | ||
03e7848a | 1447 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1448 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1449 | /* |
1450 | * Check for special case during comp_err where | |
1451 | * WRITE_PENDING has been handed off from core, | |
1452 | * but requires an extra target_put_sess_cmd() | |
1453 | * before transport_generic_free_cmd() below. | |
1454 | */ | |
1455 | if (comp_err && | |
1456 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1457 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1458 | ||
afc16604 | 1459 | target_put_sess_cmd(se_cmd); |
03e7848a NB |
1460 | } |
1461 | } | |
b8d26b3b | 1462 | |
38a2d0d4 | 1463 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
186a9647 NB |
1464 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1465 | break; | |
b8d26b3b | 1466 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1467 | spin_lock_bh(&conn->cmd_lock); |
1468 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1469 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1470 | spin_unlock_bh(&conn->cmd_lock); |
1471 | ||
b8d26b3b NB |
1472 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1473 | break; | |
1474 | case ISCSI_OP_REJECT: | |
1475 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1476 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1477 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1478 | /* If the continue bit is on, keep the command alive */ | |
1479 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1480 | break; | |
1481 | ||
b8d26b3b NB |
1482 | spin_lock_bh(&conn->cmd_lock); |
1483 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1484 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1485 | spin_unlock_bh(&conn->cmd_lock); |
1486 | ||
1487 | /* | |
1488 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1489 | * overwritten the original iscsi_opcode assignment, and the | |
1490 | * associated cmd->se_cmd needs to be released. | |
1491 | */ | |
1492 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1493 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1494 | cmd->iscsi_opcode); |
b8d26b3b NB |
1495 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1496 | break; | |
1497 | } | |
df561f66 | 1498 | fallthrough; |
b8d26b3b | 1499 | default: |
d703ce2f | 1500 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1501 | break; |
1502 | } | |
1503 | } | |
1504 | ||
1505 | static void | |
1506 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1507 | { | |
1508 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1509 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1510 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1511 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1512 | tx_desc->dma_addr = 0; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | static void | |
1517 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1518 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1519 | { |
dbbc5d11 | 1520 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1521 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1522 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1523 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1524 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1525 | } |
1526 | ||
1527 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1528 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1529 | } |
1530 | ||
96b7973e SG |
1531 | static int |
1532 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1533 | { | |
1534 | struct ib_mr_status mr_status; | |
1535 | int ret; | |
1536 | ||
1537 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1538 | if (ret) { | |
24f412dd | 1539 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1540 | goto fail_mr_status; |
1541 | } | |
1542 | ||
1543 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1544 | u64 sec_offset_err; | |
1545 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1546 | ||
1547 | switch (mr_status.sig_err.err_type) { | |
1548 | case IB_SIG_BAD_GUARD: | |
1549 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1550 | break; | |
1551 | case IB_SIG_BAD_REFTAG: | |
1552 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1553 | break; | |
1554 | case IB_SIG_BAD_APPTAG: | |
1555 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1556 | break; | |
1557 | } | |
1558 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1559 | do_div(sec_offset_err, block_size); | |
8dd992fb | 1560 | se_cmd->sense_info = sec_offset_err + se_cmd->t_task_lba; |
96b7973e | 1561 | |
4c22e07f SG |
1562 | isert_err("PI error found type %d at sector 0x%llx " |
1563 | "expected 0x%x vs actual 0x%x\n", | |
1564 | mr_status.sig_err.err_type, | |
8dd992fb | 1565 | (unsigned long long)se_cmd->sense_info, |
4c22e07f SG |
1566 | mr_status.sig_err.expected, |
1567 | mr_status.sig_err.actual); | |
96b7973e SG |
1568 | ret = 1; |
1569 | } | |
1570 | ||
1571 | fail_mr_status: | |
1572 | return ret; | |
1573 | } | |
1574 | ||
f93f3a70 | 1575 | static void |
9679cc51 | 1576 | isert_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc) |
f93f3a70 | 1577 | { |
9679cc51 | 1578 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1579 | struct isert_device *device = isert_conn->device; |
9679cc51 | 1580 | struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe); |
e3416ab2 | 1581 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc); |
66cd9d4e | 1582 | struct se_cmd *cmd = &isert_cmd->iscsit_cmd->se_cmd; |
9e961ae7 SG |
1583 | int ret = 0; |
1584 | ||
9679cc51 CH |
1585 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1586 | isert_print_wc(wc, "rdma write"); | |
1587 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1588 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1589 | isert_completion_put(desc, isert_cmd, device->ib_device, true); | |
1590 | return; | |
1591 | } | |
1592 | ||
1593 | isert_dbg("Cmd %p\n", isert_cmd); | |
1594 | ||
e9a53e73 | 1595 | ret = isert_check_pi_status(cmd, isert_cmd->rw.reg->mr); |
38a2d0d4 | 1596 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
f93f3a70 | 1597 | |
555a65f6 NB |
1598 | if (ret) { |
1599 | /* | |
1600 | * transport_generic_request_failure() expects to have | |
1601 | * plus two references to handle queue-full, so re-add | |
1602 | * one here as target-core will have already dropped | |
1603 | * it after the first isert_put_datain() callback. | |
1604 | */ | |
1605 | kref_get(&cmd->cmd_kref); | |
1606 | transport_generic_request_failure(cmd, cmd->pi_err); | |
1607 | } else { | |
1608 | /* | |
1609 | * XXX: isert_put_response() failure is not retried. | |
1610 | */ | |
66cd9d4e | 1611 | ret = isert_put_response(isert_conn->conn, isert_cmd->iscsit_cmd); |
555a65f6 NB |
1612 | if (ret) |
1613 | pr_warn_ratelimited("isert_put_response() ret: %d\n", ret); | |
1614 | } | |
f93f3a70 SG |
1615 | } |
1616 | ||
b8d26b3b | 1617 | static void |
9679cc51 | 1618 | isert_rdma_read_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1619 | { |
9679cc51 CH |
1620 | struct isert_conn *isert_conn = wc->qp->qp_context; |
1621 | struct isert_device *device = isert_conn->device; | |
1622 | struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe); | |
e3416ab2 | 1623 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc); |
66cd9d4e | 1624 | struct iscsit_cmd *cmd = isert_cmd->iscsit_cmd; |
b8d26b3b | 1625 | struct se_cmd *se_cmd = &cmd->se_cmd; |
5bac4b1a | 1626 | int ret = 0; |
b8d26b3b | 1627 | |
9679cc51 CH |
1628 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1629 | isert_print_wc(wc, "rdma read"); | |
1630 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1631 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1632 | isert_completion_put(desc, isert_cmd, device->ib_device, true); | |
1633 | return; | |
1634 | } | |
1635 | ||
1636 | isert_dbg("Cmd %p\n", isert_cmd); | |
1637 | ||
b8d26b3b | 1638 | iscsit_stop_dataout_timer(cmd); |
38a2d0d4 CH |
1639 | |
1640 | if (isert_prot_cmd(isert_conn, se_cmd)) | |
e9a53e73 | 1641 | ret = isert_check_pi_status(se_cmd, isert_cmd->rw.reg->mr); |
38a2d0d4 CH |
1642 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
1643 | cmd->write_data_done = 0; | |
b8d26b3b | 1644 | |
24f412dd | 1645 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1646 | spin_lock_bh(&cmd->istate_lock); |
1647 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1648 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1649 | spin_unlock_bh(&cmd->istate_lock); | |
1650 | ||
555a65f6 NB |
1651 | /* |
1652 | * transport_generic_request_failure() will drop the extra | |
1653 | * se_cmd->cmd_kref reference after T10-PI error, and handle | |
1654 | * any non-zero ->queue_status() callback error retries. | |
1655 | */ | |
1656 | if (ret) | |
1657 | transport_generic_request_failure(se_cmd, se_cmd->pi_err); | |
1658 | else | |
5bac4b1a | 1659 | target_execute_cmd(se_cmd); |
b8d26b3b NB |
1660 | } |
1661 | ||
1662 | static void | |
1663 | isert_do_control_comp(struct work_struct *work) | |
1664 | { | |
1665 | struct isert_cmd *isert_cmd = container_of(work, | |
1666 | struct isert_cmd, comp_work); | |
1667 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1668 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
66cd9d4e | 1669 | struct iscsit_cmd *cmd = isert_cmd->iscsit_cmd; |
b8d26b3b | 1670 | |
4c22e07f SG |
1671 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1672 | ||
b8d26b3b NB |
1673 | switch (cmd->i_state) { |
1674 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1675 | iscsit_tmr_post_handler(cmd, cmd->conn); |
df561f66 | 1676 | fallthrough; |
d2271bd0 BVA |
1677 | case ISTATE_SEND_REJECT: |
1678 | case ISTATE_SEND_TEXTRSP: | |
b8d26b3b | 1679 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1680 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1681 | ib_dev, false); | |
3df8f68a | 1682 | break; |
b8d26b3b | 1683 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1684 | iscsit_logout_post_handler(cmd, cmd->conn); |
1685 | break; | |
1686 | default: | |
4c22e07f | 1687 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1688 | dump_stack(); |
1689 | break; | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | static void | |
9679cc51 | 1694 | isert_login_send_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1695 | { |
9679cc51 CH |
1696 | struct isert_conn *isert_conn = wc->qp->qp_context; |
1697 | struct ib_device *ib_dev = isert_conn->cm_id->device; | |
1698 | struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe); | |
b8d26b3b | 1699 | |
9679cc51 CH |
1700 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1701 | isert_print_wc(wc, "login send"); | |
1702 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1703 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
b8d26b3b | 1704 | } |
897bb2c9 | 1705 | |
9679cc51 | 1706 | isert_unmap_tx_desc(tx_desc, ib_dev); |
b8d26b3b NB |
1707 | } |
1708 | ||
1709 | static void | |
9679cc51 | 1710 | isert_send_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1711 | { |
9679cc51 | 1712 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1713 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
9679cc51 | 1714 | struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe); |
e3416ab2 | 1715 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(tx_desc); |
b8d26b3b | 1716 | |
9679cc51 CH |
1717 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1718 | isert_print_wc(wc, "send"); | |
1719 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1720 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1721 | isert_completion_put(tx_desc, isert_cmd, ib_dev, true); | |
b8d26b3b NB |
1722 | return; |
1723 | } | |
b8d26b3b | 1724 | |
9679cc51 | 1725 | isert_dbg("Cmd %p\n", isert_cmd); |
4c22e07f | 1726 | |
66cd9d4e | 1727 | switch (isert_cmd->iscsit_cmd->i_state) { |
9679cc51 CH |
1728 | case ISTATE_SEND_TASKMGTRSP: |
1729 | case ISTATE_SEND_LOGOUTRSP: | |
1730 | case ISTATE_SEND_REJECT: | |
1731 | case ISTATE_SEND_TEXTRSP: | |
1732 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
1733 | ||
1734 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1735 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1736 | return; | |
b8d26b3b | 1737 | default: |
66cd9d4e | 1738 | isert_cmd->iscsit_cmd->i_state = ISTATE_SENT_STATUS; |
9679cc51 | 1739 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); |
b8d26b3b NB |
1740 | break; |
1741 | } | |
1742 | } | |
1743 | ||
b8d26b3b NB |
1744 | static int |
1745 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
1746 | { | |
b8d26b3b NB |
1747 | int ret; |
1748 | ||
4366b19c | 1749 | ret = isert_post_recv(isert_conn, isert_cmd->rx_desc); |
c97119b6 | 1750 | if (ret) |
4366b19c | 1751 | return ret; |
4366b19c | 1752 | |
e01a7674 | 1753 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, NULL); |
b8d26b3b | 1754 | if (ret) { |
24f412dd | 1755 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
1756 | return ret; |
1757 | } | |
1758 | return ret; | |
1759 | } | |
1760 | ||
1761 | static int | |
be36d683 | 1762 | isert_put_response(struct iscsit_conn *conn, struct iscsit_cmd *cmd) |
b8d26b3b | 1763 | { |
d703ce2f | 1764 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1765 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1766 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1767 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
1768 | &isert_cmd->tx_desc.iscsi_header; | |
1769 | ||
1770 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1771 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
1772 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
1773 | /* | |
1774 | * Attach SENSE DATA payload to iSCSI Response PDU | |
1775 | */ | |
1776 | if (cmd->se_cmd.sense_buffer && | |
1777 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
1778 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 1779 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1780 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 1781 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 1782 | u32 padding, pdu_len; |
b8d26b3b NB |
1783 | |
1784 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
1785 | cmd->sense_buffer); | |
1786 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
1787 | ||
1788 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
1789 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 1790 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 1791 | |
dbbc5d11 NB |
1792 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
1793 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b | 1794 | DMA_TO_DEVICE); |
def4a6ff AK |
1795 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
1796 | return -ENOMEM; | |
b8d26b3b | 1797 | |
dbbc5d11 NB |
1798 | isert_cmd->pdu_buf_len = pdu_len; |
1799 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
1800 | tx_dsg->length = pdu_len; | |
34efc7df | 1801 | tx_dsg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
1802 | isert_cmd->tx_desc.num_sge = 2; |
1803 | } | |
1804 | ||
68a86dee | 1805 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1806 | |
4c22e07f | 1807 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
1808 | |
1809 | return isert_post_response(isert_conn, isert_cmd); | |
1810 | } | |
1811 | ||
131e6abc | 1812 | static void |
be36d683 | 1813 | isert_aborted_task(struct iscsit_conn *conn, struct iscsit_cmd *cmd) |
131e6abc NB |
1814 | { |
1815 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 1816 | struct isert_conn *isert_conn = conn->context; |
131e6abc NB |
1817 | |
1818 | spin_lock_bh(&conn->cmd_lock); | |
1819 | if (!list_empty(&cmd->i_conn_node)) | |
1820 | list_del_init(&cmd->i_conn_node); | |
1821 | spin_unlock_bh(&conn->cmd_lock); | |
1822 | ||
1823 | if (cmd->data_direction == DMA_TO_DEVICE) | |
1824 | iscsit_stop_dataout_timer(cmd); | |
38a2d0d4 | 1825 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
131e6abc NB |
1826 | } |
1827 | ||
e70beee7 | 1828 | static enum target_prot_op |
be36d683 | 1829 | isert_get_sup_prot_ops(struct iscsit_conn *conn) |
e70beee7 | 1830 | { |
6700425e | 1831 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 1832 | struct isert_device *device = isert_conn->device; |
e70beee7 | 1833 | |
23a548ee SG |
1834 | if (conn->tpg->tpg_attrib.t10_pi) { |
1835 | if (device->pi_capable) { | |
24f412dd | 1836 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
1837 | isert_conn->pi_support = true; |
1838 | return TARGET_PROT_ALL; | |
1839 | } | |
1840 | } | |
1841 | ||
24f412dd | 1842 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 1843 | isert_conn->pi_support = false; |
e70beee7 NB |
1844 | |
1845 | return TARGET_PROT_NORMAL; | |
1846 | } | |
1847 | ||
b8d26b3b | 1848 | static int |
be36d683 | 1849 | isert_put_nopin(struct iscsit_cmd *cmd, struct iscsit_conn *conn, |
b8d26b3b NB |
1850 | bool nopout_response) |
1851 | { | |
d703ce2f | 1852 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1853 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1854 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1855 | ||
1856 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1857 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
1858 | &isert_cmd->tx_desc.iscsi_header, | |
1859 | nopout_response); | |
1860 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1861 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1862 | |
4c22e07f | 1863 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
1864 | |
1865 | return isert_post_response(isert_conn, isert_cmd); | |
1866 | } | |
1867 | ||
1868 | static int | |
be36d683 | 1869 | isert_put_logout_rsp(struct iscsit_cmd *cmd, struct iscsit_conn *conn) |
b8d26b3b | 1870 | { |
d703ce2f | 1871 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1872 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1873 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1874 | ||
1875 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1876 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
1877 | &isert_cmd->tx_desc.iscsi_header); | |
1878 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1879 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1880 | |
4c22e07f | 1881 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
1882 | |
1883 | return isert_post_response(isert_conn, isert_cmd); | |
1884 | } | |
1885 | ||
1886 | static int | |
be36d683 | 1887 | isert_put_tm_rsp(struct iscsit_cmd *cmd, struct iscsit_conn *conn) |
b8d26b3b | 1888 | { |
d703ce2f | 1889 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1890 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1891 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1892 | ||
1893 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1894 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
1895 | &isert_cmd->tx_desc.iscsi_header); | |
1896 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1897 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1898 | |
4c22e07f | 1899 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
1900 | |
1901 | return isert_post_response(isert_conn, isert_cmd); | |
1902 | } | |
1903 | ||
1904 | static int | |
be36d683 | 1905 | isert_put_reject(struct iscsit_cmd *cmd, struct iscsit_conn *conn) |
b8d26b3b | 1906 | { |
d703ce2f | 1907 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1908 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1909 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 1910 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1911 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
1912 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
1913 | struct iscsi_reject *hdr = | |
1914 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
1915 | |
1916 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 1917 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 1918 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
1919 | |
1920 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 1921 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
1922 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
1923 | DMA_TO_DEVICE); | |
def4a6ff AK |
1924 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
1925 | return -ENOMEM; | |
dbbc5d11 NB |
1926 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
1927 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 1928 | tx_dsg->length = ISCSI_HDR_LEN; |
34efc7df | 1929 | tx_dsg->lkey = device->pd->local_dma_lkey; |
3df8f68a NB |
1930 | isert_cmd->tx_desc.num_sge = 2; |
1931 | ||
68a86dee | 1932 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1933 | |
4c22e07f | 1934 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
1935 | |
1936 | return isert_post_response(isert_conn, isert_cmd); | |
1937 | } | |
1938 | ||
adb54c29 | 1939 | static int |
be36d683 | 1940 | isert_put_text_rsp(struct iscsit_cmd *cmd, struct iscsit_conn *conn) |
adb54c29 | 1941 | { |
d703ce2f | 1942 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1943 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
1944 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1945 | struct iscsi_text_rsp *hdr = | |
1946 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
1947 | u32 txt_rsp_len; | |
1948 | int rc; | |
1949 | ||
1950 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 1951 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
1952 | if (rc < 0) |
1953 | return rc; | |
1954 | ||
1955 | txt_rsp_len = rc; | |
1956 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
1957 | ||
1958 | if (txt_rsp_len) { | |
dac6ab30 | 1959 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1960 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
1961 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
1962 | void *txt_rsp_buf = cmd->buf_ptr; | |
1963 | ||
1964 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
1965 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
def4a6ff AK |
1966 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
1967 | return -ENOMEM; | |
adb54c29 NB |
1968 | |
1969 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
1970 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
1971 | tx_dsg->length = txt_rsp_len; | |
34efc7df | 1972 | tx_dsg->lkey = device->pd->local_dma_lkey; |
adb54c29 NB |
1973 | isert_cmd->tx_desc.num_sge = 2; |
1974 | } | |
68a86dee | 1975 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 1976 | |
f64d2792 | 1977 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
1978 | |
1979 | return isert_post_response(isert_conn, isert_cmd); | |
1980 | } | |
1981 | ||
3d73cf1a | 1982 | static inline void |
dae6345a | 1983 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_domain *domain) |
3d73cf1a | 1984 | { |
78eda2bb | 1985 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
1986 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
1987 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
1988 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
1989 | /* |
1990 | * At the moment we hard code those, but if in the future | |
1991 | * the target core would like to use it, we will take it | |
1992 | * from se_cmd. | |
1993 | */ | |
1994 | domain->sig.dif.apptag_check_mask = 0xffff; | |
1995 | domain->sig.dif.app_escape = true; | |
1996 | domain->sig.dif.ref_escape = true; | |
1997 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
1998 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
1999 | domain->sig.dif.ref_remap = true; | |
ec53a2a6 | 2000 | } |
3d73cf1a | 2001 | |
9e961ae7 SG |
2002 | static int |
2003 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2004 | { | |
38a2d0d4 CH |
2005 | memset(sig_attrs, 0, sizeof(*sig_attrs)); |
2006 | ||
9e961ae7 SG |
2007 | switch (se_cmd->prot_op) { |
2008 | case TARGET_PROT_DIN_INSERT: | |
2009 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2010 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
dae6345a | 2011 | isert_set_dif_domain(se_cmd, &sig_attrs->wire); |
9e961ae7 SG |
2012 | break; |
2013 | case TARGET_PROT_DOUT_INSERT: | |
2014 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2015 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
dae6345a | 2016 | isert_set_dif_domain(se_cmd, &sig_attrs->mem); |
9e961ae7 SG |
2017 | break; |
2018 | case TARGET_PROT_DIN_PASS: | |
2019 | case TARGET_PROT_DOUT_PASS: | |
dae6345a IR |
2020 | isert_set_dif_domain(se_cmd, &sig_attrs->wire); |
2021 | isert_set_dif_domain(se_cmd, &sig_attrs->mem); | |
9e961ae7 SG |
2022 | break; |
2023 | default: | |
24f412dd | 2024 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2025 | return -EINVAL; |
2026 | } | |
2027 | ||
26232872 MG |
2028 | if (se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD) |
2029 | sig_attrs->check_mask |= IB_SIG_CHECK_GUARD; | |
2030 | if (se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG) | |
2031 | sig_attrs->check_mask |= IB_SIG_CHECK_APPTAG; | |
2032 | if (se_cmd->prot_checks & TARGET_DIF_CHECK_REFTAG) | |
2033 | sig_attrs->check_mask |= IB_SIG_CHECK_REFTAG; | |
2034 | ||
9e961ae7 SG |
2035 | return 0; |
2036 | } | |
2037 | ||
9e961ae7 | 2038 | static int |
38a2d0d4 CH |
2039 | isert_rdma_rw_ctx_post(struct isert_cmd *cmd, struct isert_conn *conn, |
2040 | struct ib_cqe *cqe, struct ib_send_wr *chain_wr) | |
2041 | { | |
66cd9d4e | 2042 | struct se_cmd *se_cmd = &cmd->iscsit_cmd->se_cmd; |
38a2d0d4 CH |
2043 | enum dma_data_direction dir = target_reverse_dma_direction(se_cmd); |
2044 | u8 port_num = conn->cm_id->port_num; | |
2045 | u64 addr; | |
2046 | u32 rkey, offset; | |
9e961ae7 | 2047 | int ret; |
9e961ae7 | 2048 | |
66f53e6f BP |
2049 | if (cmd->ctx_init_done) |
2050 | goto rdma_ctx_post; | |
2051 | ||
38a2d0d4 CH |
2052 | if (dir == DMA_FROM_DEVICE) { |
2053 | addr = cmd->write_va; | |
2054 | rkey = cmd->write_stag; | |
66cd9d4e | 2055 | offset = cmd->iscsit_cmd->write_data_done; |
570db170 | 2056 | } else { |
38a2d0d4 CH |
2057 | addr = cmd->read_va; |
2058 | rkey = cmd->read_stag; | |
2059 | offset = 0; | |
570db170 | 2060 | } |
9e961ae7 | 2061 | |
38a2d0d4 CH |
2062 | if (isert_prot_cmd(conn, se_cmd)) { |
2063 | struct ib_sig_attrs sig_attrs; | |
59464ef4 | 2064 | |
38a2d0d4 CH |
2065 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); |
2066 | if (ret) | |
2067 | return ret; | |
9679cc51 | 2068 | |
38a2d0d4 CH |
2069 | WARN_ON_ONCE(offset); |
2070 | ret = rdma_rw_ctx_signature_init(&cmd->rw, conn->qp, port_num, | |
2071 | se_cmd->t_data_sg, se_cmd->t_data_nents, | |
2072 | se_cmd->t_prot_sg, se_cmd->t_prot_nents, | |
2073 | &sig_attrs, addr, rkey, dir); | |
59464ef4 | 2074 | } else { |
38a2d0d4 CH |
2075 | ret = rdma_rw_ctx_init(&cmd->rw, conn->qp, port_num, |
2076 | se_cmd->t_data_sg, se_cmd->t_data_nents, | |
2077 | offset, addr, rkey, dir); | |
59464ef4 | 2078 | } |
66f53e6f | 2079 | |
38a2d0d4 CH |
2080 | if (ret < 0) { |
2081 | isert_err("Cmd: %p failed to prepare RDMA res\n", cmd); | |
2082 | return ret; | |
59464ef4 VP |
2083 | } |
2084 | ||
66f53e6f BP |
2085 | cmd->ctx_init_done = true; |
2086 | ||
2087 | rdma_ctx_post: | |
38a2d0d4 CH |
2088 | ret = rdma_rw_ctx_post(&cmd->rw, conn->qp, port_num, cqe, chain_wr); |
2089 | if (ret < 0) | |
2090 | isert_err("Cmd: %p failed to post RDMA res\n", cmd); | |
59464ef4 VP |
2091 | return ret; |
2092 | } | |
2093 | ||
90ecc6e2 | 2094 | static int |
be36d683 | 2095 | isert_put_datain(struct iscsit_conn *conn, struct iscsit_cmd *cmd) |
90ecc6e2 VP |
2096 | { |
2097 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2098 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2099 | struct isert_conn *isert_conn = conn->context; |
38a2d0d4 CH |
2100 | struct ib_cqe *cqe = NULL; |
2101 | struct ib_send_wr *chain_wr = NULL; | |
90ecc6e2 VP |
2102 | int rc; |
2103 | ||
24f412dd | 2104 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2105 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2106 | |
38a2d0d4 CH |
2107 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
2108 | isert_cmd->tx_desc.tx_cqe.done = isert_rdma_write_done; | |
2109 | cqe = &isert_cmd->tx_desc.tx_cqe; | |
2110 | } else { | |
9e961ae7 SG |
2111 | /* |
2112 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2113 | */ | |
2114 | isert_create_send_desc(isert_conn, isert_cmd, | |
2115 | &isert_cmd->tx_desc); | |
2116 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2117 | &isert_cmd->tx_desc.iscsi_header); | |
2118 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2119 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2120 | &isert_cmd->tx_desc.send_wr); |
4366b19c JD |
2121 | |
2122 | rc = isert_post_recv(isert_conn, isert_cmd->rx_desc); | |
c97119b6 | 2123 | if (rc) |
4366b19c | 2124 | return rc; |
b8d26b3b | 2125 | |
38a2d0d4 CH |
2126 | chain_wr = &isert_cmd->tx_desc.send_wr; |
2127 | } | |
b8d26b3b | 2128 | |
555a65f6 NB |
2129 | rc = isert_rdma_rw_ctx_post(isert_cmd, isert_conn, cqe, chain_wr); |
2130 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ rc: %d\n", | |
2131 | isert_cmd, rc); | |
2132 | return rc; | |
b8d26b3b NB |
2133 | } |
2134 | ||
2135 | static int | |
be36d683 | 2136 | isert_get_dataout(struct iscsit_conn *conn, struct iscsit_cmd *cmd, bool recovery) |
b8d26b3b | 2137 | { |
d703ce2f | 2138 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
555a65f6 | 2139 | int ret; |
b8d26b3b | 2140 | |
24f412dd | 2141 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
38a2d0d4 | 2142 | isert_cmd, cmd->se_cmd.data_length, cmd->write_data_done); |
b8d26b3b | 2143 | |
38a2d0d4 | 2144 | isert_cmd->tx_desc.tx_cqe.done = isert_rdma_read_done; |
555a65f6 NB |
2145 | ret = isert_rdma_rw_ctx_post(isert_cmd, conn->context, |
2146 | &isert_cmd->tx_desc.tx_cqe, NULL); | |
bdf20e72 | 2147 | |
555a65f6 NB |
2148 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE rc: %d\n", |
2149 | isert_cmd, ret); | |
2150 | return ret; | |
b8d26b3b NB |
2151 | } |
2152 | ||
2153 | static int | |
be36d683 | 2154 | isert_immediate_queue(struct iscsit_conn *conn, struct iscsit_cmd *cmd, int state) |
b8d26b3b | 2155 | { |
a4c15cd9 JD |
2156 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
2157 | int ret = 0; | |
b8d26b3b NB |
2158 | |
2159 | switch (state) { | |
a4c15cd9 JD |
2160 | case ISTATE_REMOVE: |
2161 | spin_lock_bh(&conn->cmd_lock); | |
2162 | list_del_init(&cmd->i_conn_node); | |
2163 | spin_unlock_bh(&conn->cmd_lock); | |
2164 | isert_put_cmd(isert_cmd, true); | |
2165 | break; | |
b8d26b3b NB |
2166 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: |
2167 | ret = isert_put_nopin(cmd, conn, false); | |
2168 | break; | |
2169 | default: | |
24f412dd | 2170 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
2171 | ret = -EINVAL; |
2172 | break; | |
2173 | } | |
2174 | ||
2175 | return ret; | |
2176 | } | |
2177 | ||
2178 | static int | |
be36d683 | 2179 | isert_response_queue(struct iscsit_conn *conn, struct iscsit_cmd *cmd, int state) |
b8d26b3b | 2180 | { |
991bb764 | 2181 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2182 | int ret; |
2183 | ||
2184 | switch (state) { | |
2185 | case ISTATE_SEND_LOGOUTRSP: | |
2186 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
2187 | if (!ret) |
2188 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
2189 | break; |
2190 | case ISTATE_SEND_NOPIN: | |
2191 | ret = isert_put_nopin(cmd, conn, true); | |
2192 | break; | |
2193 | case ISTATE_SEND_TASKMGTRSP: | |
2194 | ret = isert_put_tm_rsp(cmd, conn); | |
2195 | break; | |
2196 | case ISTATE_SEND_REJECT: | |
2197 | ret = isert_put_reject(cmd, conn); | |
2198 | break; | |
adb54c29 NB |
2199 | case ISTATE_SEND_TEXTRSP: |
2200 | ret = isert_put_text_rsp(cmd, conn); | |
2201 | break; | |
b8d26b3b NB |
2202 | case ISTATE_SEND_STATUS: |
2203 | /* | |
2204 | * Special case for sending non GOOD SCSI status from TX thread | |
2205 | * context during pre se_cmd excecution failure. | |
2206 | */ | |
2207 | ret = isert_put_response(conn, cmd); | |
2208 | break; | |
2209 | default: | |
24f412dd | 2210 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
2211 | ret = -EINVAL; |
2212 | break; | |
2213 | } | |
2214 | ||
2215 | return ret; | |
2216 | } | |
2217 | ||
ca6c1d82 SG |
2218 | struct rdma_cm_id * |
2219 | isert_setup_id(struct isert_np *isert_np) | |
2220 | { | |
2221 | struct iscsi_np *np = isert_np->np; | |
2222 | struct rdma_cm_id *id; | |
2223 | struct sockaddr *sa; | |
2224 | int ret; | |
2225 | ||
2226 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 2227 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 | 2228 | |
fa20105e | 2229 | id = rdma_create_id(&init_net, isert_cma_handler, isert_np, |
ca6c1d82 SG |
2230 | RDMA_PS_TCP, IB_QPT_RC); |
2231 | if (IS_ERR(id)) { | |
24f412dd | 2232 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
2233 | ret = PTR_ERR(id); |
2234 | goto out; | |
2235 | } | |
24f412dd | 2236 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 | 2237 | |
221442ea MG |
2238 | /* |
2239 | * Allow both IPv4 and IPv6 sockets to bind a single port | |
2240 | * at the same time. | |
2241 | */ | |
2242 | ret = rdma_set_afonly(id, 1); | |
2243 | if (ret) { | |
2244 | isert_err("rdma_set_afonly() failed: %d\n", ret); | |
2245 | goto out_id; | |
2246 | } | |
2247 | ||
ca6c1d82 SG |
2248 | ret = rdma_bind_addr(id, sa); |
2249 | if (ret) { | |
24f412dd | 2250 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
2251 | goto out_id; |
2252 | } | |
2253 | ||
992607e8 | 2254 | ret = rdma_listen(id, 0); |
ca6c1d82 | 2255 | if (ret) { |
24f412dd | 2256 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
2257 | goto out_id; |
2258 | } | |
2259 | ||
2260 | return id; | |
2261 | out_id: | |
2262 | rdma_destroy_id(id); | |
2263 | out: | |
2264 | return ERR_PTR(ret); | |
2265 | } | |
2266 | ||
b8d26b3b NB |
2267 | static int |
2268 | isert_setup_np(struct iscsi_np *np, | |
13a3cf08 | 2269 | struct sockaddr_storage *ksockaddr) |
b8d26b3b NB |
2270 | { |
2271 | struct isert_np *isert_np; | |
2272 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
2273 | int ret; |
2274 | ||
2275 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
93b80f29 | 2276 | if (!isert_np) |
b8d26b3b | 2277 | return -ENOMEM; |
93b80f29 | 2278 | |
ed8cb0a4 JD |
2279 | sema_init(&isert_np->sem, 0); |
2280 | mutex_init(&isert_np->mutex); | |
bd379220 JD |
2281 | INIT_LIST_HEAD(&isert_np->accepted); |
2282 | INIT_LIST_HEAD(&isert_np->pending); | |
ca6c1d82 | 2283 | isert_np->np = np; |
b8d26b3b | 2284 | |
b8d26b3b NB |
2285 | /* |
2286 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
2287 | * in iscsi_target_configfs.c code.. | |
2288 | */ | |
2289 | memcpy(&np->np_sockaddr, ksockaddr, | |
13a3cf08 | 2290 | sizeof(struct sockaddr_storage)); |
b8d26b3b | 2291 | |
ca6c1d82 | 2292 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 2293 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
2294 | ret = PTR_ERR(isert_lid); |
2295 | goto out; | |
2296 | } | |
2297 | ||
ed8cb0a4 | 2298 | isert_np->cm_id = isert_lid; |
b8d26b3b | 2299 | np->np_context = isert_np; |
b8d26b3b NB |
2300 | |
2301 | return 0; | |
2302 | ||
b8d26b3b NB |
2303 | out: |
2304 | kfree(isert_np); | |
ca6c1d82 | 2305 | |
b8d26b3b NB |
2306 | return ret; |
2307 | } | |
2308 | ||
b8d26b3b NB |
2309 | static int |
2310 | isert_rdma_accept(struct isert_conn *isert_conn) | |
2311 | { | |
dac6ab30 | 2312 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
2313 | struct rdma_conn_param cp; |
2314 | int ret; | |
13bce482 | 2315 | struct iser_cm_hdr rsp_hdr; |
b8d26b3b NB |
2316 | |
2317 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
2318 | cp.initiator_depth = isert_conn->initiator_depth; |
2319 | cp.retry_count = 7; | |
2320 | cp.rnr_retry_count = 7; | |
2321 | ||
13bce482 | 2322 | memset(&rsp_hdr, 0, sizeof(rsp_hdr)); |
422bd0ac JD |
2323 | rsp_hdr.flags = ISERT_ZBVA_NOT_USED; |
2324 | if (!isert_conn->snd_w_inv) | |
2325 | rsp_hdr.flags = rsp_hdr.flags | ISERT_SEND_W_INV_NOT_USED; | |
13bce482 JD |
2326 | cp.private_data = (void *)&rsp_hdr; |
2327 | cp.private_data_len = sizeof(rsp_hdr); | |
2328 | ||
b8d26b3b NB |
2329 | ret = rdma_accept(cm_id, &cp); |
2330 | if (ret) { | |
24f412dd | 2331 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
2332 | return ret; |
2333 | } | |
2334 | ||
b8d26b3b NB |
2335 | return 0; |
2336 | } | |
2337 | ||
2338 | static int | |
be36d683 | 2339 | isert_get_login_rx(struct iscsit_conn *conn, struct iscsi_login *login) |
b8d26b3b | 2340 | { |
6700425e | 2341 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2342 | int ret; |
2343 | ||
24f412dd | 2344 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
2345 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
2346 | if (ret) { | |
24f412dd | 2347 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
2348 | isert_conn); |
2349 | return ret; | |
2350 | } | |
2351 | reinit_completion(&isert_conn->login_req_comp); | |
2352 | ||
6faaa85f NB |
2353 | /* |
2354 | * For login requests after the first PDU, isert_rx_login_req() will | |
549f39a5 TH |
2355 | * kick queue_delayed_work(isert_login_wq, &conn->login_work) as |
2356 | * the packet is received, which turns this callback from | |
2357 | * iscsi_target_do_login_rx() into a NOP. | |
6faaa85f NB |
2358 | */ |
2359 | if (!login->first_request) | |
2360 | return 0; | |
b8d26b3b | 2361 | |
2371e5da SG |
2362 | isert_rx_login_req(isert_conn); |
2363 | ||
dac6ab30 SG |
2364 | isert_info("before login_comp conn: %p\n", conn); |
2365 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
2366 | if (ret) |
2367 | return ret; | |
2368 | ||
24f412dd | 2369 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 2370 | |
b8d26b3b NB |
2371 | return 0; |
2372 | } | |
2373 | ||
2374 | static void | |
be36d683 | 2375 | isert_set_conn_info(struct iscsi_np *np, struct iscsit_conn *conn, |
b8d26b3b NB |
2376 | struct isert_conn *isert_conn) |
2377 | { | |
dac6ab30 | 2378 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b | 2379 | struct rdma_route *cm_route = &cm_id->route; |
b8d26b3b NB |
2380 | |
2381 | conn->login_family = np->np_sockaddr.ss_family; | |
2382 | ||
dc58f760 AG |
2383 | conn->login_sockaddr = cm_route->addr.dst_addr; |
2384 | conn->local_sockaddr = cm_route->addr.src_addr; | |
b8d26b3b NB |
2385 | } |
2386 | ||
2387 | static int | |
be36d683 | 2388 | isert_accept_np(struct iscsi_np *np, struct iscsit_conn *conn) |
b8d26b3b | 2389 | { |
6700425e | 2390 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 2391 | struct isert_conn *isert_conn; |
c6b8e918 | 2392 | int ret; |
b8d26b3b NB |
2393 | |
2394 | accept_wait: | |
ed8cb0a4 | 2395 | ret = down_interruptible(&isert_np->sem); |
c6b8e918 | 2396 | if (ret) |
b8d26b3b NB |
2397 | return -ENODEV; |
2398 | ||
2399 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 2400 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 2401 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 2402 | isert_dbg("np_thread_state %d\n", |
e346ab34 | 2403 | np->np_thread_state); |
bf194997 | 2404 | /* |
e346ab34 SG |
2405 | * No point in stalling here when np_thread |
2406 | * is in state RESET/SHUTDOWN/EXIT - bail | |
bf194997 | 2407 | */ |
b8d26b3b NB |
2408 | return -ENODEV; |
2409 | } | |
2410 | spin_unlock_bh(&np->np_thread_lock); | |
2411 | ||
ed8cb0a4 | 2412 | mutex_lock(&isert_np->mutex); |
bd379220 | 2413 | if (list_empty(&isert_np->pending)) { |
ed8cb0a4 | 2414 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
2415 | goto accept_wait; |
2416 | } | |
bd379220 JD |
2417 | isert_conn = list_first_entry(&isert_np->pending, |
2418 | struct isert_conn, node); | |
2419 | list_del_init(&isert_conn->node); | |
ed8cb0a4 | 2420 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
2421 | |
2422 | conn->context = isert_conn; | |
2423 | isert_conn->conn = conn; | |
aea92980 | 2424 | isert_conn->state = ISER_CONN_BOUND; |
b8d26b3b | 2425 | |
b8d26b3b NB |
2426 | isert_set_conn_info(np, conn, isert_conn); |
2427 | ||
24f412dd | 2428 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 2429 | |
b8d26b3b NB |
2430 | return 0; |
2431 | } | |
2432 | ||
2433 | static void | |
2434 | isert_free_np(struct iscsi_np *np) | |
2435 | { | |
6700425e | 2436 | struct isert_np *isert_np = np->np_context; |
268e6811 | 2437 | struct isert_conn *isert_conn, *n; |
691b0480 | 2438 | LIST_HEAD(drop_conn_list); |
b8d26b3b | 2439 | |
ed8cb0a4 JD |
2440 | if (isert_np->cm_id) |
2441 | rdma_destroy_id(isert_np->cm_id); | |
b8d26b3b | 2442 | |
268e6811 SG |
2443 | /* |
2444 | * FIXME: At this point we don't have a good way to insure | |
2445 | * that at this point we don't have hanging connections that | |
2446 | * completed RDMA establishment but didn't start iscsi login | |
2447 | * process. So work-around this by cleaning up what ever piled | |
bd379220 | 2448 | * up in accepted and pending lists. |
268e6811 | 2449 | */ |
ed8cb0a4 | 2450 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
2451 | if (!list_empty(&isert_np->pending)) { |
2452 | isert_info("Still have isert pending connections\n"); | |
2453 | list_for_each_entry_safe(isert_conn, n, | |
2454 | &isert_np->pending, | |
2455 | node) { | |
2456 | isert_info("cleaning isert_conn %p state (%d)\n", | |
2457 | isert_conn, isert_conn->state); | |
691b0480 | 2458 | list_move_tail(&isert_conn->node, &drop_conn_list); |
bd379220 JD |
2459 | } |
2460 | } | |
2461 | ||
2462 | if (!list_empty(&isert_np->accepted)) { | |
2463 | isert_info("Still have isert accepted connections\n"); | |
268e6811 | 2464 | list_for_each_entry_safe(isert_conn, n, |
bd379220 JD |
2465 | &isert_np->accepted, |
2466 | node) { | |
24f412dd | 2467 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 | 2468 | isert_conn, isert_conn->state); |
691b0480 | 2469 | list_move_tail(&isert_conn->node, &drop_conn_list); |
268e6811 SG |
2470 | } |
2471 | } | |
ed8cb0a4 | 2472 | mutex_unlock(&isert_np->mutex); |
268e6811 | 2473 | |
691b0480 SV |
2474 | list_for_each_entry_safe(isert_conn, n, &drop_conn_list, node) { |
2475 | list_del_init(&isert_conn->node); | |
2476 | isert_connect_release(isert_conn); | |
2477 | } | |
2478 | ||
b8d26b3b NB |
2479 | np->np_context = NULL; |
2480 | kfree(isert_np); | |
2481 | } | |
2482 | ||
b02efbfc SG |
2483 | static void isert_release_work(struct work_struct *work) |
2484 | { | |
2485 | struct isert_conn *isert_conn = container_of(work, | |
2486 | struct isert_conn, | |
2487 | release_work); | |
2488 | ||
24f412dd | 2489 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 2490 | |
dac6ab30 | 2491 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 2492 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 2493 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 2494 | |
24f412dd | 2495 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
2496 | isert_put_conn(isert_conn); |
2497 | } | |
2498 | ||
991bb764 SG |
2499 | static void |
2500 | isert_wait4logout(struct isert_conn *isert_conn) | |
2501 | { | |
be36d683 | 2502 | struct iscsit_conn *conn = isert_conn->conn; |
991bb764 | 2503 | |
4c22e07f SG |
2504 | isert_info("conn %p\n", isert_conn); |
2505 | ||
991bb764 | 2506 | if (isert_conn->logout_posted) { |
24f412dd | 2507 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
2508 | wait_for_completion_timeout(&conn->conn_logout_comp, |
2509 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
2510 | } | |
2511 | } | |
2512 | ||
76261ada | 2513 | static void |
be36d683 | 2514 | isert_wait4cmds(struct iscsit_conn *conn) |
76261ada | 2515 | { |
be36d683 | 2516 | isert_info("iscsit_conn %p\n", conn); |
76261ada BVA |
2517 | |
2518 | if (conn->sess) { | |
6d256bee MC |
2519 | target_stop_cmd_counter(conn->cmd_cnt); |
2520 | target_wait_for_cmds(conn->cmd_cnt); | |
76261ada BVA |
2521 | } |
2522 | } | |
2523 | ||
3e03c4b0 JD |
2524 | /** |
2525 | * isert_put_unsol_pending_cmds() - Drop commands waiting for | |
2526 | * unsolicitate dataout | |
2527 | * @conn: iscsi connection | |
2528 | * | |
2529 | * We might still have commands that are waiting for unsolicited | |
2530 | * dataouts messages. We must put the extra reference on those | |
2531 | * before blocking on the target_wait_for_session_cmds | |
2532 | */ | |
2533 | static void | |
be36d683 | 2534 | isert_put_unsol_pending_cmds(struct iscsit_conn *conn) |
3e03c4b0 | 2535 | { |
66cd9d4e | 2536 | struct iscsit_cmd *cmd, *tmp; |
3e03c4b0 JD |
2537 | static LIST_HEAD(drop_cmd_list); |
2538 | ||
2539 | spin_lock_bh(&conn->cmd_lock); | |
2540 | list_for_each_entry_safe(cmd, tmp, &conn->conn_cmd_list, i_conn_node) { | |
2541 | if ((cmd->cmd_flags & ICF_NON_IMMEDIATE_UNSOLICITED_DATA) && | |
2542 | (cmd->write_data_done < conn->sess->sess_ops->FirstBurstLength) && | |
2543 | (cmd->write_data_done < cmd->se_cmd.data_length)) | |
2544 | list_move_tail(&cmd->i_conn_node, &drop_cmd_list); | |
2545 | } | |
2546 | spin_unlock_bh(&conn->cmd_lock); | |
2547 | ||
2548 | list_for_each_entry_safe(cmd, tmp, &drop_cmd_list, i_conn_node) { | |
2549 | list_del_init(&cmd->i_conn_node); | |
2550 | if (cmd->i_state != ISTATE_REMOVE) { | |
2551 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
2552 | ||
2553 | isert_info("conn %p dropping cmd %p\n", conn, cmd); | |
2554 | isert_put_cmd(isert_cmd, true); | |
2555 | } | |
2556 | } | |
2557 | } | |
2558 | ||
be36d683 | 2559 | static void isert_wait_conn(struct iscsit_conn *conn) |
b8d26b3b NB |
2560 | { |
2561 | struct isert_conn *isert_conn = conn->context; | |
2562 | ||
4c22e07f | 2563 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 2564 | |
dac6ab30 | 2565 | mutex_lock(&isert_conn->mutex); |
954f2372 | 2566 | isert_conn_terminate(isert_conn); |
dac6ab30 | 2567 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 2568 | |
572a1434 | 2569 | ib_drain_qp(isert_conn->qp); |
3e03c4b0 | 2570 | isert_put_unsol_pending_cmds(conn); |
76261ada | 2571 | isert_wait4cmds(conn); |
991bb764 | 2572 | isert_wait4logout(isert_conn); |
defd8848 NB |
2573 | } |
2574 | ||
be36d683 | 2575 | static void isert_free_conn(struct iscsit_conn *conn) |
defd8848 NB |
2576 | { |
2577 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b | 2578 | |
572a1434 | 2579 | ib_drain_qp(isert_conn->qp); |
b8d26b3b NB |
2580 | isert_put_conn(isert_conn); |
2581 | } | |
2582 | ||
be36d683 | 2583 | static void isert_get_rx_pdu(struct iscsit_conn *conn) |
187e84f7 VP |
2584 | { |
2585 | struct completion comp; | |
2586 | ||
2587 | init_completion(&comp); | |
2588 | ||
2589 | wait_for_completion_interruptible(&comp); | |
2590 | } | |
2591 | ||
b8d26b3b NB |
2592 | static struct iscsit_transport iser_target_transport = { |
2593 | .name = "IB/iSER", | |
2594 | .transport_type = ISCSI_INFINIBAND, | |
bd027d85 | 2595 | .rdma_shutdown = true, |
d703ce2f | 2596 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
2597 | .owner = THIS_MODULE, |
2598 | .iscsit_setup_np = isert_setup_np, | |
2599 | .iscsit_accept_np = isert_accept_np, | |
2600 | .iscsit_free_np = isert_free_np, | |
defd8848 | 2601 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 2602 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
2603 | .iscsit_get_login_rx = isert_get_login_rx, |
2604 | .iscsit_put_login_tx = isert_put_login_tx, | |
2605 | .iscsit_immediate_queue = isert_immediate_queue, | |
2606 | .iscsit_response_queue = isert_response_queue, | |
2607 | .iscsit_get_dataout = isert_get_dataout, | |
2608 | .iscsit_queue_data_in = isert_put_datain, | |
2609 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 2610 | .iscsit_aborted_task = isert_aborted_task, |
187e84f7 | 2611 | .iscsit_get_rx_pdu = isert_get_rx_pdu, |
e70beee7 | 2612 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
2613 | }; |
2614 | ||
2615 | static int __init isert_init(void) | |
2616 | { | |
549f39a5 TH |
2617 | isert_login_wq = alloc_workqueue("isert_login_wq", 0, 0); |
2618 | if (!isert_login_wq) { | |
2619 | isert_err("Unable to allocate isert_login_wq\n"); | |
2620 | return -ENOMEM; | |
2621 | } | |
b8d26b3b | 2622 | |
631af550 SG |
2623 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
2624 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 2625 | if (!isert_comp_wq) { |
24f412dd | 2626 | isert_err("Unable to allocate isert_comp_wq\n"); |
549f39a5 | 2627 | goto destroy_login_wq; |
b8d26b3b NB |
2628 | } |
2629 | ||
b02efbfc SG |
2630 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
2631 | WQ_UNBOUND_MAX_ACTIVE); | |
2632 | if (!isert_release_wq) { | |
24f412dd | 2633 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
2634 | goto destroy_comp_wq; |
2635 | } | |
2636 | ||
b8d26b3b | 2637 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 2638 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 2639 | |
b8d26b3b NB |
2640 | return 0; |
2641 | ||
b02efbfc SG |
2642 | destroy_comp_wq: |
2643 | destroy_workqueue(isert_comp_wq); | |
549f39a5 TH |
2644 | destroy_login_wq: |
2645 | destroy_workqueue(isert_login_wq); | |
6f0fae3d | 2646 | |
549f39a5 | 2647 | return -ENOMEM; |
b8d26b3b NB |
2648 | } |
2649 | ||
2650 | static void __exit isert_exit(void) | |
2651 | { | |
549f39a5 | 2652 | flush_workqueue(isert_login_wq); |
b02efbfc | 2653 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 2654 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 2655 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 2656 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
549f39a5 | 2657 | destroy_workqueue(isert_login_wq); |
b8d26b3b NB |
2658 | } |
2659 | ||
2660 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
b8d26b3b NB |
2661 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
2662 | MODULE_LICENSE("GPL"); | |
2663 | ||
2664 | module_init(isert_init); | |
2665 | module_exit(isert_exit); |