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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 | ||
38 | static int isert_sg_tablesize = ISCSI_ISER_DEF_SG_TABLESIZE; | |
39 | module_param_cb(sg_tablesize, &sg_tablesize_ops, &isert_sg_tablesize, 0644); | |
40 | MODULE_PARM_DESC(sg_tablesize, | |
41 | "Number of gather/scatter entries in a single scsi command, should >= 128 (default: 256, max: 4096)"); | |
42 | ||
b8d26b3b NB |
43 | static DEFINE_MUTEX(device_list_mutex); |
44 | static LIST_HEAD(device_list); | |
b8d26b3b | 45 | static struct workqueue_struct *isert_comp_wq; |
b02efbfc | 46 | static struct workqueue_struct *isert_release_wq; |
b8d26b3b | 47 | |
f93f3a70 SG |
48 | static int |
49 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); | |
2371e5da | 50 | static int |
9679cc51 | 51 | isert_login_post_recv(struct isert_conn *isert_conn); |
2371e5da SG |
52 | static int |
53 | isert_rdma_accept(struct isert_conn *isert_conn); | |
ca6c1d82 | 54 | struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); |
d40945d8 | 55 | |
2f1b6b7d | 56 | static void isert_release_work(struct work_struct *work); |
9679cc51 CH |
57 | static void isert_recv_done(struct ib_cq *cq, struct ib_wc *wc); |
58 | static void isert_send_done(struct ib_cq *cq, struct ib_wc *wc); | |
59 | static void isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc); | |
60 | static void isert_login_send_done(struct ib_cq *cq, struct ib_wc *wc); | |
2f1b6b7d | 61 | |
dae7a75f MG |
62 | static int isert_sg_tablesize_set(const char *val, const struct kernel_param *kp) |
63 | { | |
64 | int n = 0, ret; | |
65 | ||
66 | ret = kstrtoint(val, 10, &n); | |
67 | if (ret != 0 || n < ISCSI_ISER_MIN_SG_TABLESIZE || | |
68 | n > ISCSI_ISER_MAX_SG_TABLESIZE) | |
69 | return -EINVAL; | |
70 | ||
71 | return param_set_int(val, kp); | |
72 | } | |
73 | ||
302cc7c3 SG |
74 | static inline bool |
75 | isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) | |
76 | { | |
23a548ee | 77 | return (conn->pi_support && |
302cc7c3 SG |
78 | cmd->prot_op != TARGET_PROT_NORMAL); |
79 | } | |
80 | ||
b8d26b3b NB |
81 | static void |
82 | isert_qp_event_callback(struct ib_event *e, void *context) | |
83 | { | |
6700425e | 84 | struct isert_conn *isert_conn = context; |
b8d26b3b | 85 | |
ea8a1616 SG |
86 | isert_err("%s (%d): conn %p\n", |
87 | ib_event_msg(e->event), e->event, isert_conn); | |
88 | ||
b8d26b3b NB |
89 | switch (e->event) { |
90 | case IB_EVENT_COMM_EST: | |
dac6ab30 | 91 | rdma_notify(isert_conn->cm_id, IB_EVENT_COMM_EST); |
b8d26b3b NB |
92 | break; |
93 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
4c22e07f | 94 | isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); |
b8d26b3b NB |
95 | break; |
96 | default: | |
97 | break; | |
98 | } | |
99 | } | |
100 | ||
40fc069a SG |
101 | static struct ib_qp * |
102 | isert_create_qp(struct isert_conn *isert_conn, | |
40fc069a SG |
103 | struct rdma_cm_id *cma_id) |
104 | { | |
c6e66307 | 105 | u32 cq_size = ISERT_QP_MAX_REQ_DTOS + ISERT_QP_MAX_RECV_DTOS + 2; |
dac6ab30 | 106 | struct isert_device *device = isert_conn->device; |
c6e66307 | 107 | struct ib_device *ib_dev = device->ib_device; |
40fc069a | 108 | struct ib_qp_init_attr attr; |
317000b9 | 109 | int ret, factor; |
b8d26b3b | 110 | |
c6e66307 YF |
111 | isert_conn->cq = ib_cq_pool_get(ib_dev, cq_size, -1, IB_POLL_WORKQUEUE); |
112 | if (IS_ERR(isert_conn->cq)) { | |
113 | isert_err("Unable to allocate cq\n"); | |
114 | ret = PTR_ERR(isert_conn->cq); | |
115 | return ERR_PTR(ret); | |
116 | } | |
117 | isert_conn->cq_size = cq_size; | |
118 | ||
b8d26b3b NB |
119 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); |
120 | attr.event_handler = isert_qp_event_callback; | |
121 | attr.qp_context = isert_conn; | |
c6e66307 YF |
122 | attr.send_cq = isert_conn->cq; |
123 | attr.recv_cq = isert_conn->cq; | |
572a1434 | 124 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS + 1; |
bdf20e72 | 125 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; |
317000b9 | 126 | factor = rdma_rw_mr_factor(device->ib_device, cma_id->port_num, |
dae7a75f | 127 | isert_sg_tablesize); |
317000b9 | 128 | attr.cap.max_rdma_ctxs = ISCSI_DEF_XMIT_CMDS_MAX * factor; |
33023fb8 | 129 | attr.cap.max_send_sge = device->ib_device->attrs.max_send_sge; |
b8d26b3b NB |
130 | attr.cap.max_recv_sge = 1; |
131 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
132 | attr.qp_type = IB_QPT_RC; | |
570db170 | 133 | if (device->pi_capable) |
c0a6cbb9 | 134 | attr.create_flags |= IB_QP_CREATE_INTEGRITY_EN; |
b8d26b3b | 135 | |
67cb3949 | 136 | ret = rdma_create_qp(cma_id, device->pd, &attr); |
b8d26b3b | 137 | if (ret) { |
24f412dd | 138 | isert_err("rdma_create_qp failed for cma_id %d\n", ret); |
c6e66307 YF |
139 | ib_cq_pool_put(isert_conn->cq, isert_conn->cq_size); |
140 | ||
40fc069a SG |
141 | return ERR_PTR(ret); |
142 | } | |
143 | ||
144 | return cma_id->qp; | |
145 | } | |
146 | ||
b8d26b3b NB |
147 | static int |
148 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
149 | { | |
dac6ab30 | 150 | struct isert_device *device = isert_conn->device; |
67cb3949 | 151 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
152 | struct iser_rx_desc *rx_desc; |
153 | struct ib_sge *rx_sg; | |
154 | u64 dma_addr; | |
155 | int i, j; | |
156 | ||
6396bb22 KC |
157 | isert_conn->rx_descs = kcalloc(ISERT_QP_MAX_RECV_DTOS, |
158 | sizeof(struct iser_rx_desc), | |
159 | GFP_KERNEL); | |
dac6ab30 | 160 | if (!isert_conn->rx_descs) |
93b80f29 | 161 | return -ENOMEM; |
b8d26b3b | 162 | |
dac6ab30 | 163 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
164 | |
165 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
0b089c1e SG |
166 | dma_addr = ib_dma_map_single(ib_dev, rx_desc->buf, |
167 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
168 | if (ib_dma_mapping_error(ib_dev, dma_addr)) |
169 | goto dma_map_fail; | |
170 | ||
171 | rx_desc->dma_addr = dma_addr; | |
172 | ||
173 | rx_sg = &rx_desc->rx_sg; | |
0b089c1e | 174 | rx_sg->addr = rx_desc->dma_addr + isert_get_hdr_offset(rx_desc); |
b8d26b3b | 175 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; |
34efc7df | 176 | rx_sg->lkey = device->pd->local_dma_lkey; |
9679cc51 | 177 | rx_desc->rx_cqe.done = isert_recv_done; |
b8d26b3b NB |
178 | } |
179 | ||
b8d26b3b NB |
180 | return 0; |
181 | ||
182 | dma_map_fail: | |
dac6ab30 | 183 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
184 | for (j = 0; j < i; j++, rx_desc++) { |
185 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
0b089c1e | 186 | ISER_RX_SIZE, DMA_FROM_DEVICE); |
b8d26b3b | 187 | } |
dac6ab30 SG |
188 | kfree(isert_conn->rx_descs); |
189 | isert_conn->rx_descs = NULL; | |
4c22e07f | 190 | isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); |
b8d26b3b NB |
191 | return -ENOMEM; |
192 | } | |
193 | ||
194 | static void | |
195 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
196 | { | |
dac6ab30 | 197 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
b8d26b3b NB |
198 | struct iser_rx_desc *rx_desc; |
199 | int i; | |
200 | ||
dac6ab30 | 201 | if (!isert_conn->rx_descs) |
b8d26b3b NB |
202 | return; |
203 | ||
dac6ab30 | 204 | rx_desc = isert_conn->rx_descs; |
b8d26b3b NB |
205 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
206 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
0b089c1e | 207 | ISER_RX_SIZE, DMA_FROM_DEVICE); |
b8d26b3b NB |
208 | } |
209 | ||
dac6ab30 SG |
210 | kfree(isert_conn->rx_descs); |
211 | isert_conn->rx_descs = NULL; | |
b8d26b3b NB |
212 | } |
213 | ||
172369c5 SG |
214 | static int |
215 | isert_create_device_ib_res(struct isert_device *device) | |
216 | { | |
4a061b28 | 217 | struct ib_device *ib_dev = device->ib_device; |
fd8205e8 | 218 | int ret; |
172369c5 | 219 | |
33023fb8 SW |
220 | isert_dbg("devattr->max_send_sge: %d devattr->max_recv_sge %d\n", |
221 | ib_dev->attrs.max_send_sge, ib_dev->attrs.max_recv_sge); | |
4a061b28 | 222 | isert_dbg("devattr->max_sge_rd: %d\n", ib_dev->attrs.max_sge_rd); |
172369c5 | 223 | |
ed082d36 | 224 | device->pd = ib_alloc_pd(ib_dev, 0); |
67cb3949 SG |
225 | if (IS_ERR(device->pd)) { |
226 | ret = PTR_ERR(device->pd); | |
227 | isert_err("failed to allocate pd, device %p, ret=%d\n", | |
228 | device, ret); | |
c6e66307 | 229 | return ret; |
67cb3949 SG |
230 | } |
231 | ||
172369c5 | 232 | /* Check signature cap */ |
a6dc16b6 MG |
233 | if (ib_dev->attrs.device_cap_flags & IB_DEVICE_INTEGRITY_HANDOVER) |
234 | device->pi_capable = true; | |
235 | else | |
236 | device->pi_capable = false; | |
67cb3949 | 237 | |
b8d26b3b | 238 | return 0; |
b8d26b3b NB |
239 | } |
240 | ||
241 | static void | |
242 | isert_free_device_ib_res(struct isert_device *device) | |
243 | { | |
24f412dd | 244 | isert_info("device %p\n", device); |
b8d26b3b | 245 | |
67cb3949 | 246 | ib_dealloc_pd(device->pd); |
b8d26b3b NB |
247 | } |
248 | ||
249 | static void | |
cf8ae958 | 250 | isert_device_put(struct isert_device *device) |
b8d26b3b NB |
251 | { |
252 | mutex_lock(&device_list_mutex); | |
253 | device->refcount--; | |
4c22e07f | 254 | isert_info("device %p refcount %d\n", device, device->refcount); |
b8d26b3b NB |
255 | if (!device->refcount) { |
256 | isert_free_device_ib_res(device); | |
257 | list_del(&device->dev_node); | |
258 | kfree(device); | |
259 | } | |
260 | mutex_unlock(&device_list_mutex); | |
261 | } | |
262 | ||
263 | static struct isert_device * | |
cf8ae958 | 264 | isert_device_get(struct rdma_cm_id *cma_id) |
b8d26b3b NB |
265 | { |
266 | struct isert_device *device; | |
267 | int ret; | |
268 | ||
269 | mutex_lock(&device_list_mutex); | |
270 | list_for_each_entry(device, &device_list, dev_node) { | |
271 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
272 | device->refcount++; | |
4c22e07f SG |
273 | isert_info("Found iser device %p refcount %d\n", |
274 | device, device->refcount); | |
b8d26b3b NB |
275 | mutex_unlock(&device_list_mutex); |
276 | return device; | |
277 | } | |
278 | } | |
279 | ||
280 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
281 | if (!device) { | |
282 | mutex_unlock(&device_list_mutex); | |
283 | return ERR_PTR(-ENOMEM); | |
284 | } | |
285 | ||
286 | INIT_LIST_HEAD(&device->dev_node); | |
287 | ||
288 | device->ib_device = cma_id->device; | |
289 | ret = isert_create_device_ib_res(device); | |
290 | if (ret) { | |
291 | kfree(device); | |
292 | mutex_unlock(&device_list_mutex); | |
293 | return ERR_PTR(ret); | |
294 | } | |
295 | ||
296 | device->refcount++; | |
297 | list_add_tail(&device->dev_node, &device_list); | |
4c22e07f SG |
298 | isert_info("Created a new iser device %p refcount %d\n", |
299 | device, device->refcount); | |
b8d26b3b NB |
300 | mutex_unlock(&device_list_mutex); |
301 | ||
302 | return device; | |
303 | } | |
304 | ||
ae9ea9ed SG |
305 | static void |
306 | isert_init_conn(struct isert_conn *isert_conn) | |
b8d26b3b | 307 | { |
b8d26b3b | 308 | isert_conn->state = ISER_CONN_INIT; |
bd379220 | 309 | INIT_LIST_HEAD(&isert_conn->node); |
dac6ab30 | 310 | init_completion(&isert_conn->login_comp); |
2371e5da | 311 | init_completion(&isert_conn->login_req_comp); |
63b268d2 | 312 | init_waitqueue_head(&isert_conn->rem_wait); |
dac6ab30 SG |
313 | kref_init(&isert_conn->kref); |
314 | mutex_init(&isert_conn->mutex); | |
2f1b6b7d | 315 | INIT_WORK(&isert_conn->release_work, isert_release_work); |
ae9ea9ed | 316 | } |
b8d26b3b | 317 | |
ae9ea9ed SG |
318 | static void |
319 | isert_free_login_buf(struct isert_conn *isert_conn) | |
320 | { | |
dac6ab30 | 321 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
ae9ea9ed SG |
322 | |
323 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
ed1083b2 | 324 | ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE); |
5adabdd1 CH |
325 | kfree(isert_conn->login_rsp_buf); |
326 | ||
0b089c1e SG |
327 | ib_dma_unmap_single(ib_dev, isert_conn->login_desc->dma_addr, |
328 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
329 | kfree(isert_conn->login_desc); | |
ae9ea9ed SG |
330 | } |
331 | ||
332 | static int | |
333 | isert_alloc_login_buf(struct isert_conn *isert_conn, | |
334 | struct ib_device *ib_dev) | |
335 | { | |
336 | int ret; | |
b8d26b3b | 337 | |
0b089c1e | 338 | isert_conn->login_desc = kzalloc(sizeof(*isert_conn->login_desc), |
5adabdd1 | 339 | GFP_KERNEL); |
0b089c1e | 340 | if (!isert_conn->login_desc) |
ae9ea9ed | 341 | return -ENOMEM; |
b8d26b3b | 342 | |
0b089c1e SG |
343 | isert_conn->login_desc->dma_addr = ib_dma_map_single(ib_dev, |
344 | isert_conn->login_desc->buf, | |
345 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
346 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_desc->dma_addr); | |
b8d26b3b | 347 | if (ret) { |
0b089c1e SG |
348 | isert_err("login_desc dma mapping error: %d\n", ret); |
349 | isert_conn->login_desc->dma_addr = 0; | |
350 | goto out_free_login_desc; | |
5adabdd1 CH |
351 | } |
352 | ||
353 | isert_conn->login_rsp_buf = kzalloc(ISER_RX_PAYLOAD_SIZE, GFP_KERNEL); | |
354 | if (!isert_conn->login_rsp_buf) { | |
1d5840c9 | 355 | ret = -ENOMEM; |
0b089c1e | 356 | goto out_unmap_login_desc; |
b8d26b3b NB |
357 | } |
358 | ||
359 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
5adabdd1 | 360 | isert_conn->login_rsp_buf, |
ed1083b2 | 361 | ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE); |
b8d26b3b NB |
362 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); |
363 | if (ret) { | |
ae9ea9ed | 364 | isert_err("login_rsp_dma mapping error: %d\n", ret); |
b8d26b3b | 365 | isert_conn->login_rsp_dma = 0; |
5adabdd1 | 366 | goto out_free_login_rsp_buf; |
b8d26b3b NB |
367 | } |
368 | ||
ae9ea9ed SG |
369 | return 0; |
370 | ||
5adabdd1 CH |
371 | out_free_login_rsp_buf: |
372 | kfree(isert_conn->login_rsp_buf); | |
0b089c1e SG |
373 | out_unmap_login_desc: |
374 | ib_dma_unmap_single(ib_dev, isert_conn->login_desc->dma_addr, | |
375 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
376 | out_free_login_desc: | |
377 | kfree(isert_conn->login_desc); | |
ae9ea9ed SG |
378 | return ret; |
379 | } | |
380 | ||
422bd0ac JD |
381 | static void |
382 | isert_set_nego_params(struct isert_conn *isert_conn, | |
383 | struct rdma_conn_param *param) | |
384 | { | |
385 | struct ib_device_attr *attr = &isert_conn->device->ib_device->attrs; | |
386 | ||
387 | /* Set max inflight RDMA READ requests */ | |
388 | isert_conn->initiator_depth = min_t(u8, param->initiator_depth, | |
389 | attr->max_qp_init_rd_atom); | |
390 | isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); | |
391 | ||
392 | if (param->private_data) { | |
393 | u8 flags = *(u8 *)param->private_data; | |
394 | ||
395 | /* | |
396 | * use remote invalidation if the both initiator | |
397 | * and the HCA support it | |
398 | */ | |
399 | isert_conn->snd_w_inv = !(flags & ISER_SEND_W_INV_NOT_SUP) && | |
400 | (attr->device_cap_flags & | |
401 | IB_DEVICE_MEM_MGT_EXTENSIONS); | |
402 | if (isert_conn->snd_w_inv) | |
403 | isert_info("Using remote invalidation\n"); | |
404 | } | |
405 | } | |
406 | ||
c6e66307 YF |
407 | static void |
408 | isert_destroy_qp(struct isert_conn *isert_conn) | |
409 | { | |
410 | ib_destroy_qp(isert_conn->qp); | |
411 | ib_cq_pool_put(isert_conn->cq, isert_conn->cq_size); | |
412 | } | |
413 | ||
ae9ea9ed SG |
414 | static int |
415 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
416 | { | |
417 | struct isert_np *isert_np = cma_id->context; | |
418 | struct iscsi_np *np = isert_np->np; | |
419 | struct isert_conn *isert_conn; | |
420 | struct isert_device *device; | |
421 | int ret = 0; | |
422 | ||
423 | spin_lock_bh(&np->np_thread_lock); | |
424 | if (!np->enabled) { | |
425 | spin_unlock_bh(&np->np_thread_lock); | |
426 | isert_dbg("iscsi_np is not enabled, reject connect request\n"); | |
8094ba0a | 427 | return rdma_reject(cma_id, NULL, 0, IB_CM_REJ_CONSUMER_DEFINED); |
ae9ea9ed SG |
428 | } |
429 | spin_unlock_bh(&np->np_thread_lock); | |
430 | ||
431 | isert_dbg("cma_id: %p, portal: %p\n", | |
432 | cma_id, cma_id->context); | |
433 | ||
434 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
435 | if (!isert_conn) | |
436 | return -ENOMEM; | |
437 | ||
438 | isert_init_conn(isert_conn); | |
dac6ab30 | 439 | isert_conn->cm_id = cma_id; |
ae9ea9ed | 440 | |
cf8ae958 | 441 | device = isert_device_get(cma_id); |
b8d26b3b NB |
442 | if (IS_ERR(device)) { |
443 | ret = PTR_ERR(device); | |
adb76a52 | 444 | goto out; |
b8d26b3b | 445 | } |
dac6ab30 | 446 | isert_conn->device = device; |
b8d26b3b | 447 | |
adb76a52 LY |
448 | ret = isert_alloc_login_buf(isert_conn, cma_id->device); |
449 | if (ret) | |
450 | goto out_conn_dev; | |
451 | ||
422bd0ac | 452 | isert_set_nego_params(isert_conn, &event->param.conn); |
1a92e17e | 453 | |
c6e66307 YF |
454 | isert_conn->qp = isert_create_qp(isert_conn, cma_id); |
455 | if (IS_ERR(isert_conn->qp)) { | |
456 | ret = PTR_ERR(isert_conn->qp); | |
adb76a52 | 457 | goto out_rsp_dma_map; |
c6e66307 | 458 | } |
b8d26b3b | 459 | |
9679cc51 | 460 | ret = isert_login_post_recv(isert_conn); |
2371e5da | 461 | if (ret) |
c6e66307 | 462 | goto out_destroy_qp; |
2371e5da SG |
463 | |
464 | ret = isert_rdma_accept(isert_conn); | |
465 | if (ret) | |
c6e66307 | 466 | goto out_destroy_qp; |
2371e5da | 467 | |
ed8cb0a4 | 468 | mutex_lock(&isert_np->mutex); |
bd379220 | 469 | list_add_tail(&isert_conn->node, &isert_np->accepted); |
ed8cb0a4 | 470 | mutex_unlock(&isert_np->mutex); |
b8d26b3b | 471 | |
b8d26b3b NB |
472 | return 0; |
473 | ||
c6e66307 YF |
474 | out_destroy_qp: |
475 | isert_destroy_qp(isert_conn); | |
b8d26b3b | 476 | out_rsp_dma_map: |
ae9ea9ed | 477 | isert_free_login_buf(isert_conn); |
adb76a52 LY |
478 | out_conn_dev: |
479 | isert_device_put(device); | |
b8d26b3b NB |
480 | out: |
481 | kfree(isert_conn); | |
8094ba0a | 482 | rdma_reject(cma_id, NULL, 0, IB_CM_REJ_CONSUMER_DEFINED); |
b8d26b3b NB |
483 | return ret; |
484 | } | |
485 | ||
486 | static void | |
487 | isert_connect_release(struct isert_conn *isert_conn) | |
488 | { | |
dac6ab30 | 489 | struct isert_device *device = isert_conn->device; |
b8d26b3b | 490 | |
4c22e07f | 491 | isert_dbg("conn %p\n", isert_conn); |
b8d26b3b | 492 | |
57df81e3 SG |
493 | BUG_ON(!device); |
494 | ||
19e2090f | 495 | isert_free_rx_descriptors(isert_conn); |
63b268d2 RR |
496 | if (isert_conn->cm_id && |
497 | !isert_conn->dev_removed) | |
dac6ab30 | 498 | rdma_destroy_id(isert_conn->cm_id); |
19e2090f | 499 | |
c6e66307 YF |
500 | if (isert_conn->qp) |
501 | isert_destroy_qp(isert_conn); | |
b8d26b3b | 502 | |
0b089c1e | 503 | if (isert_conn->login_desc) |
ae9ea9ed SG |
504 | isert_free_login_buf(isert_conn); |
505 | ||
57df81e3 | 506 | isert_device_put(device); |
b8d26b3b | 507 | |
63b268d2 RR |
508 | if (isert_conn->dev_removed) |
509 | wake_up_interruptible(&isert_conn->rem_wait); | |
510 | else | |
511 | kfree(isert_conn); | |
b8d26b3b NB |
512 | } |
513 | ||
514 | static void | |
515 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
516 | { | |
19e2090f | 517 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
bd379220 | 518 | struct isert_np *isert_np = cma_id->context; |
c2f88b17 | 519 | |
24f412dd | 520 | isert_info("conn %p\n", isert_conn); |
128e9cc8 | 521 | |
dac6ab30 | 522 | mutex_lock(&isert_conn->mutex); |
bd379220 JD |
523 | isert_conn->state = ISER_CONN_UP; |
524 | kref_get(&isert_conn->kref); | |
dac6ab30 | 525 | mutex_unlock(&isert_conn->mutex); |
bd379220 JD |
526 | |
527 | mutex_lock(&isert_np->mutex); | |
528 | list_move_tail(&isert_conn->node, &isert_np->pending); | |
529 | mutex_unlock(&isert_np->mutex); | |
530 | ||
531 | isert_info("np %p: Allow accept_np to continue\n", isert_np); | |
532 | up(&isert_np->sem); | |
b8d26b3b NB |
533 | } |
534 | ||
535 | static void | |
dac6ab30 | 536 | isert_release_kref(struct kref *kref) |
b8d26b3b NB |
537 | { |
538 | struct isert_conn *isert_conn = container_of(kref, | |
dac6ab30 | 539 | struct isert_conn, kref); |
b8d26b3b | 540 | |
4c22e07f SG |
541 | isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, |
542 | current->pid); | |
b8d26b3b NB |
543 | |
544 | isert_connect_release(isert_conn); | |
545 | } | |
546 | ||
547 | static void | |
548 | isert_put_conn(struct isert_conn *isert_conn) | |
549 | { | |
dac6ab30 | 550 | kref_put(&isert_conn->kref, isert_release_kref); |
b8d26b3b NB |
551 | } |
552 | ||
6d1fba0c JD |
553 | static void |
554 | isert_handle_unbound_conn(struct isert_conn *isert_conn) | |
555 | { | |
556 | struct isert_np *isert_np = isert_conn->cm_id->context; | |
557 | ||
558 | mutex_lock(&isert_np->mutex); | |
559 | if (!list_empty(&isert_conn->node)) { | |
560 | /* | |
561 | * This means iscsi doesn't know this connection | |
562 | * so schedule a cleanup ourselves | |
563 | */ | |
564 | list_del_init(&isert_conn->node); | |
565 | isert_put_conn(isert_conn); | |
6d1fba0c JD |
566 | queue_work(isert_release_wq, &isert_conn->release_work); |
567 | } | |
568 | mutex_unlock(&isert_np->mutex); | |
569 | } | |
570 | ||
954f2372 SG |
571 | /** |
572 | * isert_conn_terminate() - Initiate connection termination | |
573 | * @isert_conn: isert connection struct | |
574 | * | |
575 | * Notes: | |
aea92980 | 576 | * In case the connection state is BOUND, move state |
954f2372 | 577 | * to TEMINATING and start teardown sequence (rdma_disconnect). |
128e9cc8 | 578 | * In case the connection state is UP, complete flush as well. |
954f2372 | 579 | * |
dac6ab30 | 580 | * This routine must be called with mutex held. Thus it is |
954f2372 SG |
581 | * safe to call multiple times. |
582 | */ | |
583 | static void | |
584 | isert_conn_terminate(struct isert_conn *isert_conn) | |
585 | { | |
586 | int err; | |
587 | ||
6d1fba0c JD |
588 | if (isert_conn->state >= ISER_CONN_TERMINATING) |
589 | return; | |
590 | ||
591 | isert_info("Terminating conn %p state %d\n", | |
592 | isert_conn, isert_conn->state); | |
593 | isert_conn->state = ISER_CONN_TERMINATING; | |
594 | err = rdma_disconnect(isert_conn->cm_id); | |
595 | if (err) | |
596 | isert_warn("Failed rdma_disconnect isert_conn %p\n", | |
597 | isert_conn); | |
954f2372 SG |
598 | } |
599 | ||
3b726ae2 | 600 | static int |
ca6c1d82 SG |
601 | isert_np_cma_handler(struct isert_np *isert_np, |
602 | enum rdma_cm_event_type event) | |
b8d26b3b | 603 | { |
ea8a1616 SG |
604 | isert_dbg("%s (%d): isert np %p\n", |
605 | rdma_event_msg(event), event, isert_np); | |
3b726ae2 | 606 | |
ca6c1d82 SG |
607 | switch (event) { |
608 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
ed8cb0a4 | 609 | isert_np->cm_id = NULL; |
ca6c1d82 SG |
610 | break; |
611 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
ed8cb0a4 JD |
612 | isert_np->cm_id = isert_setup_id(isert_np); |
613 | if (IS_ERR(isert_np->cm_id)) { | |
24f412dd | 614 | isert_err("isert np %p setup id failed: %ld\n", |
ed8cb0a4 JD |
615 | isert_np, PTR_ERR(isert_np->cm_id)); |
616 | isert_np->cm_id = NULL; | |
ca6c1d82 SG |
617 | } |
618 | break; | |
619 | default: | |
24f412dd | 620 | isert_err("isert np %p Unexpected event %d\n", |
ca6c1d82 | 621 | isert_np, event); |
3b726ae2 SG |
622 | } |
623 | ||
ca6c1d82 SG |
624 | return -1; |
625 | } | |
626 | ||
627 | static int | |
628 | isert_disconnected_handler(struct rdma_cm_id *cma_id, | |
629 | enum rdma_cm_event_type event) | |
630 | { | |
f81bf458 | 631 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
ca6c1d82 | 632 | |
dac6ab30 | 633 | mutex_lock(&isert_conn->mutex); |
6d1fba0c JD |
634 | switch (isert_conn->state) { |
635 | case ISER_CONN_TERMINATING: | |
636 | break; | |
637 | case ISER_CONN_UP: | |
638 | isert_conn_terminate(isert_conn); | |
572a1434 | 639 | ib_drain_qp(isert_conn->qp); |
6d1fba0c JD |
640 | isert_handle_unbound_conn(isert_conn); |
641 | break; | |
642 | case ISER_CONN_BOUND: | |
643 | case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ | |
644 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
645 | break; | |
646 | default: | |
506f71d1 | 647 | isert_warn("conn %p terminating in state %d\n", |
6d1fba0c | 648 | isert_conn, isert_conn->state); |
2f1b6b7d | 649 | } |
6d1fba0c | 650 | mutex_unlock(&isert_conn->mutex); |
2f1b6b7d | 651 | |
3b726ae2 | 652 | return 0; |
b8d26b3b NB |
653 | } |
654 | ||
4a579da2 | 655 | static int |
954f2372 SG |
656 | isert_connect_error(struct rdma_cm_id *cma_id) |
657 | { | |
19e2090f | 658 | struct isert_conn *isert_conn = cma_id->qp->qp_context; |
954f2372 | 659 | |
cd52cb26 | 660 | ib_drain_qp(isert_conn->qp); |
bd379220 | 661 | list_del_init(&isert_conn->node); |
dac6ab30 | 662 | isert_conn->cm_id = NULL; |
954f2372 | 663 | isert_put_conn(isert_conn); |
4a579da2 SG |
664 | |
665 | return -1; | |
954f2372 SG |
666 | } |
667 | ||
b8d26b3b NB |
668 | static int |
669 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
670 | { | |
f81bf458 | 671 | struct isert_np *isert_np = cma_id->context; |
63b268d2 | 672 | struct isert_conn *isert_conn; |
b8d26b3b NB |
673 | int ret = 0; |
674 | ||
ea8a1616 SG |
675 | isert_info("%s (%d): status %d id %p np %p\n", |
676 | rdma_event_msg(event->event), event->event, | |
4c22e07f | 677 | event->status, cma_id, cma_id->context); |
b8d26b3b | 678 | |
f81bf458 JD |
679 | if (isert_np->cm_id == cma_id) |
680 | return isert_np_cma_handler(cma_id->context, event->event); | |
681 | ||
b8d26b3b NB |
682 | switch (event->event) { |
683 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
b8d26b3b | 684 | ret = isert_connect_request(cma_id, event); |
3b726ae2 | 685 | if (ret) |
4c22e07f | 686 | isert_err("failed handle connect request %d\n", ret); |
b8d26b3b NB |
687 | break; |
688 | case RDMA_CM_EVENT_ESTABLISHED: | |
b8d26b3b NB |
689 | isert_connected_handler(cma_id); |
690 | break; | |
df561f66 GS |
691 | case RDMA_CM_EVENT_ADDR_CHANGE: |
692 | case RDMA_CM_EVENT_DISCONNECTED: | |
88c4015f | 693 | case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ |
ca6c1d82 | 694 | ret = isert_disconnected_handler(cma_id, event->event); |
b8d26b3b | 695 | break; |
63b268d2 RR |
696 | case RDMA_CM_EVENT_DEVICE_REMOVAL: |
697 | isert_conn = cma_id->qp->qp_context; | |
698 | isert_conn->dev_removed = true; | |
699 | isert_disconnected_handler(cma_id, event->event); | |
700 | wait_event_interruptible(isert_conn->rem_wait, | |
701 | isert_conn->state == ISER_CONN_DOWN); | |
702 | kfree(isert_conn); | |
703 | /* | |
704 | * return non-zero from the callback to destroy | |
705 | * the rdma cm id | |
706 | */ | |
707 | return 1; | |
d2271bd0 | 708 | case RDMA_CM_EVENT_REJECTED: |
1e38a366 SW |
709 | isert_info("Connection rejected: %s\n", |
710 | rdma_reject_msg(cma_id, event->status)); | |
df561f66 | 711 | fallthrough; |
d2271bd0 | 712 | case RDMA_CM_EVENT_UNREACHABLE: |
b8d26b3b | 713 | case RDMA_CM_EVENT_CONNECT_ERROR: |
4a579da2 | 714 | ret = isert_connect_error(cma_id); |
954f2372 | 715 | break; |
b8d26b3b | 716 | default: |
24f412dd | 717 | isert_err("Unhandled RDMA CMA event: %d\n", event->event); |
b8d26b3b NB |
718 | break; |
719 | } | |
720 | ||
b8d26b3b NB |
721 | return ret; |
722 | } | |
723 | ||
724 | static int | |
4366b19c | 725 | isert_post_recvm(struct isert_conn *isert_conn, u32 count) |
b8d26b3b | 726 | { |
e01a7674 | 727 | struct ib_recv_wr *rx_wr; |
b8d26b3b | 728 | int i, ret; |
b8d26b3b NB |
729 | struct iser_rx_desc *rx_desc; |
730 | ||
dac6ab30 | 731 | for (rx_wr = isert_conn->rx_wr, i = 0; i < count; i++, rx_wr++) { |
4366b19c | 732 | rx_desc = &isert_conn->rx_descs[i]; |
9679cc51 CH |
733 | |
734 | rx_wr->wr_cqe = &rx_desc->rx_cqe; | |
4366b19c JD |
735 | rx_wr->sg_list = &rx_desc->rx_sg; |
736 | rx_wr->num_sge = 1; | |
737 | rx_wr->next = rx_wr + 1; | |
7a56dc88 | 738 | rx_desc->in_use = false; |
b8d26b3b | 739 | } |
b8d26b3b NB |
740 | rx_wr--; |
741 | rx_wr->next = NULL; /* mark end of work requests list */ | |
742 | ||
e01a7674 | 743 | ret = ib_post_recv(isert_conn->qp, isert_conn->rx_wr, NULL); |
6d1fba0c | 744 | if (ret) |
24f412dd | 745 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
4366b19c JD |
746 | |
747 | return ret; | |
748 | } | |
749 | ||
750 | static int | |
751 | isert_post_recv(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc) | |
752 | { | |
e01a7674 | 753 | struct ib_recv_wr rx_wr; |
4366b19c JD |
754 | int ret; |
755 | ||
7a56dc88 SG |
756 | if (!rx_desc->in_use) { |
757 | /* | |
758 | * if the descriptor is not in-use we already reposted it | |
759 | * for recv, so just silently return | |
760 | */ | |
761 | return 0; | |
762 | } | |
763 | ||
764 | rx_desc->in_use = false; | |
9679cc51 | 765 | rx_wr.wr_cqe = &rx_desc->rx_cqe; |
4366b19c JD |
766 | rx_wr.sg_list = &rx_desc->rx_sg; |
767 | rx_wr.num_sge = 1; | |
768 | rx_wr.next = NULL; | |
769 | ||
e01a7674 | 770 | ret = ib_post_recv(isert_conn->qp, &rx_wr, NULL); |
6d1fba0c | 771 | if (ret) |
4366b19c | 772 | isert_err("ib_post_recv() failed with ret: %d\n", ret); |
4366b19c | 773 | |
b8d26b3b NB |
774 | return ret; |
775 | } | |
776 | ||
777 | static int | |
9679cc51 | 778 | isert_login_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) |
b8d26b3b | 779 | { |
dac6ab30 | 780 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
e01a7674 | 781 | struct ib_send_wr send_wr; |
b8d26b3b NB |
782 | int ret; |
783 | ||
784 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
785 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
786 | ||
9679cc51 CH |
787 | tx_desc->tx_cqe.done = isert_login_send_done; |
788 | ||
b8d26b3b | 789 | send_wr.next = NULL; |
9679cc51 | 790 | send_wr.wr_cqe = &tx_desc->tx_cqe; |
b8d26b3b NB |
791 | send_wr.sg_list = tx_desc->tx_sg; |
792 | send_wr.num_sge = tx_desc->num_sge; | |
793 | send_wr.opcode = IB_WR_SEND; | |
794 | send_wr.send_flags = IB_SEND_SIGNALED; | |
795 | ||
e01a7674 | 796 | ret = ib_post_send(isert_conn->qp, &send_wr, NULL); |
bdf20e72 | 797 | if (ret) |
24f412dd | 798 | isert_err("ib_post_send() failed, ret: %d\n", ret); |
b8d26b3b NB |
799 | |
800 | return ret; | |
801 | } | |
802 | ||
803 | static void | |
763b6965 AE |
804 | __isert_create_send_desc(struct isert_device *device, |
805 | struct iser_tx_desc *tx_desc) | |
b8d26b3b | 806 | { |
b8d26b3b | 807 | |
d3cf81f9 SG |
808 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_ctrl)); |
809 | tx_desc->iser_header.flags = ISCSI_CTRL; | |
b8d26b3b NB |
810 | |
811 | tx_desc->num_sge = 1; | |
b8d26b3b | 812 | |
34efc7df JG |
813 | if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) { |
814 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; | |
24f412dd | 815 | isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); |
b8d26b3b NB |
816 | } |
817 | } | |
818 | ||
763b6965 AE |
819 | static void |
820 | isert_create_send_desc(struct isert_conn *isert_conn, | |
821 | struct isert_cmd *isert_cmd, | |
822 | struct iser_tx_desc *tx_desc) | |
823 | { | |
824 | struct isert_device *device = isert_conn->device; | |
825 | struct ib_device *ib_dev = device->ib_device; | |
826 | ||
827 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
828 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
829 | ||
830 | __isert_create_send_desc(device, tx_desc); | |
831 | } | |
832 | ||
b8d26b3b NB |
833 | static int |
834 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
835 | struct iser_tx_desc *tx_desc) | |
836 | { | |
dac6ab30 | 837 | struct isert_device *device = isert_conn->device; |
67cb3949 | 838 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b NB |
839 | u64 dma_addr; |
840 | ||
841 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
842 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
843 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
24f412dd | 844 | isert_err("ib_dma_mapping_error() failed\n"); |
b8d26b3b NB |
845 | return -ENOMEM; |
846 | } | |
847 | ||
848 | tx_desc->dma_addr = dma_addr; | |
849 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
850 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
34efc7df | 851 | tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey; |
b8d26b3b | 852 | |
4c22e07f SG |
853 | isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", |
854 | tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, | |
855 | tx_desc->tx_sg[0].lkey); | |
b8d26b3b NB |
856 | |
857 | return 0; | |
858 | } | |
859 | ||
860 | static void | |
95b60f07 | 861 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
68a86dee | 862 | struct ib_send_wr *send_wr) |
b8d26b3b | 863 | { |
95b60f07 NB |
864 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
865 | ||
9679cc51 CH |
866 | tx_desc->tx_cqe.done = isert_send_done; |
867 | send_wr->wr_cqe = &tx_desc->tx_cqe; | |
422bd0ac JD |
868 | |
869 | if (isert_conn->snd_w_inv && isert_cmd->inv_rkey) { | |
870 | send_wr->opcode = IB_WR_SEND_WITH_INV; | |
871 | send_wr->ex.invalidate_rkey = isert_cmd->inv_rkey; | |
872 | } else { | |
873 | send_wr->opcode = IB_WR_SEND; | |
874 | } | |
875 | ||
95b60f07 | 876 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 877 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 | 878 | send_wr->send_flags = IB_SEND_SIGNALED; |
b8d26b3b NB |
879 | } |
880 | ||
881 | static int | |
9679cc51 | 882 | isert_login_post_recv(struct isert_conn *isert_conn) |
b8d26b3b | 883 | { |
e01a7674 | 884 | struct ib_recv_wr rx_wr; |
b8d26b3b NB |
885 | struct ib_sge sge; |
886 | int ret; | |
887 | ||
888 | memset(&sge, 0, sizeof(struct ib_sge)); | |
0b089c1e SG |
889 | sge.addr = isert_conn->login_desc->dma_addr + |
890 | isert_get_hdr_offset(isert_conn->login_desc); | |
ed1083b2 | 891 | sge.length = ISER_RX_PAYLOAD_SIZE; |
34efc7df | 892 | sge.lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b | 893 | |
24f412dd | 894 | isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", |
b8d26b3b NB |
895 | sge.addr, sge.length, sge.lkey); |
896 | ||
0b089c1e | 897 | isert_conn->login_desc->rx_cqe.done = isert_login_recv_done; |
9679cc51 | 898 | |
b8d26b3b | 899 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); |
0b089c1e | 900 | rx_wr.wr_cqe = &isert_conn->login_desc->rx_cqe; |
b8d26b3b NB |
901 | rx_wr.sg_list = &sge; |
902 | rx_wr.num_sge = 1; | |
903 | ||
e01a7674 | 904 | ret = ib_post_recv(isert_conn->qp, &rx_wr, NULL); |
6d1fba0c | 905 | if (ret) |
24f412dd | 906 | isert_err("ib_post_recv() failed: %d\n", ret); |
b8d26b3b | 907 | |
b8d26b3b NB |
908 | return ret; |
909 | } | |
910 | ||
911 | static int | |
912 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
913 | u32 length) | |
914 | { | |
915 | struct isert_conn *isert_conn = conn->context; | |
dac6ab30 | 916 | struct isert_device *device = isert_conn->device; |
67cb3949 | 917 | struct ib_device *ib_dev = device->ib_device; |
dac6ab30 | 918 | struct iser_tx_desc *tx_desc = &isert_conn->login_tx_desc; |
b8d26b3b NB |
919 | int ret; |
920 | ||
763b6965 | 921 | __isert_create_send_desc(device, tx_desc); |
b8d26b3b NB |
922 | |
923 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
924 | sizeof(struct iscsi_hdr)); | |
925 | ||
926 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
927 | ||
928 | if (length > 0) { | |
929 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
930 | ||
931 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
932 | length, DMA_TO_DEVICE); | |
933 | ||
934 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
935 | ||
936 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
937 | length, DMA_TO_DEVICE); | |
938 | ||
939 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
940 | tx_dsg->length = length; | |
34efc7df | 941 | tx_dsg->lkey = isert_conn->device->pd->local_dma_lkey; |
b8d26b3b NB |
942 | tx_desc->num_sge = 2; |
943 | } | |
944 | if (!login->login_failed) { | |
945 | if (login->login_complete) { | |
946 | ret = isert_alloc_rx_descriptors(isert_conn); | |
947 | if (ret) | |
948 | return ret; | |
949 | ||
4366b19c JD |
950 | ret = isert_post_recvm(isert_conn, |
951 | ISERT_QP_MAX_RECV_DTOS); | |
b8d26b3b NB |
952 | if (ret) |
953 | return ret; | |
954 | ||
128e9cc8 | 955 | /* Now we are in FULL_FEATURE phase */ |
dac6ab30 | 956 | mutex_lock(&isert_conn->mutex); |
128e9cc8 | 957 | isert_conn->state = ISER_CONN_FULL_FEATURE; |
dac6ab30 | 958 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b NB |
959 | goto post_send; |
960 | } | |
961 | ||
9679cc51 | 962 | ret = isert_login_post_recv(isert_conn); |
b8d26b3b NB |
963 | if (ret) |
964 | return ret; | |
965 | } | |
966 | post_send: | |
9679cc51 | 967 | ret = isert_login_post_send(isert_conn, tx_desc); |
b8d26b3b NB |
968 | if (ret) |
969 | return ret; | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
974 | static void | |
2371e5da | 975 | isert_rx_login_req(struct isert_conn *isert_conn) |
b8d26b3b | 976 | { |
0b089c1e | 977 | struct iser_rx_desc *rx_desc = isert_conn->login_desc; |
2371e5da | 978 | int rx_buflen = isert_conn->login_req_len; |
b8d26b3b NB |
979 | struct iscsi_conn *conn = isert_conn->conn; |
980 | struct iscsi_login *login = conn->conn_login; | |
981 | int size; | |
982 | ||
24f412dd | 983 | isert_info("conn %p\n", isert_conn); |
2371e5da SG |
984 | |
985 | WARN_ON_ONCE(!login); | |
b8d26b3b NB |
986 | |
987 | if (login->first_request) { | |
988 | struct iscsi_login_req *login_req = | |
0b089c1e | 989 | (struct iscsi_login_req *)isert_get_iscsi_hdr(rx_desc); |
b8d26b3b NB |
990 | /* |
991 | * Setup the initial iscsi_login values from the leading | |
992 | * login request PDU. | |
993 | */ | |
994 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
995 | login->current_stage = | |
996 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
997 | >> 2; | |
998 | login->version_min = login_req->min_version; | |
999 | login->version_max = login_req->max_version; | |
1000 | memcpy(login->isid, login_req->isid, 6); | |
1001 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1002 | login->init_task_tag = login_req->itt; | |
1003 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1004 | login->cid = be16_to_cpu(login_req->cid); | |
1005 | login->tsih = be16_to_cpu(login_req->tsih); | |
1006 | } | |
1007 | ||
0b089c1e | 1008 | memcpy(&login->req[0], isert_get_iscsi_hdr(rx_desc), ISCSI_HDR_LEN); |
b8d26b3b NB |
1009 | |
1010 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
4c22e07f SG |
1011 | isert_dbg("Using login payload size: %d, rx_buflen: %d " |
1012 | "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, | |
1013 | MAX_KEY_VALUE_PAIRS); | |
0b089c1e | 1014 | memcpy(login->req_buf, isert_get_data(rx_desc), size); |
b8d26b3b | 1015 | |
6faaa85f | 1016 | if (login->first_request) { |
dac6ab30 | 1017 | complete(&isert_conn->login_comp); |
6faaa85f NB |
1018 | return; |
1019 | } | |
1020 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1021 | } |
1022 | ||
b8d26b3b | 1023 | static struct iscsi_cmd |
4366b19c | 1024 | *isert_allocate_cmd(struct iscsi_conn *conn, struct iser_rx_desc *rx_desc) |
b8d26b3b | 1025 | { |
6700425e | 1026 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1027 | struct isert_cmd *isert_cmd; |
d703ce2f | 1028 | struct iscsi_cmd *cmd; |
b8d26b3b | 1029 | |
676687c6 | 1030 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f | 1031 | if (!cmd) { |
24f412dd | 1032 | isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); |
b8d26b3b NB |
1033 | return NULL; |
1034 | } | |
d703ce2f | 1035 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1036 | isert_cmd->conn = isert_conn; |
d703ce2f | 1037 | isert_cmd->iscsi_cmd = cmd; |
4366b19c | 1038 | isert_cmd->rx_desc = rx_desc; |
b8d26b3b | 1039 | |
d703ce2f | 1040 | return cmd; |
b8d26b3b NB |
1041 | } |
1042 | ||
1043 | static int | |
1044 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1045 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1046 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1047 | { |
b8d26b3b NB |
1048 | struct iscsi_conn *conn = isert_conn->conn; |
1049 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
b8d26b3b NB |
1050 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; |
1051 | bool dump_payload = false; | |
9fd60088 | 1052 | unsigned int data_len; |
b8d26b3b NB |
1053 | |
1054 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1055 | if (rc < 0) | |
1056 | return rc; | |
1057 | ||
1058 | imm_data = cmd->immediate_data; | |
1059 | imm_data_len = cmd->first_burst_len; | |
1060 | unsol_data = cmd->unsolicited_data; | |
9fd60088 | 1061 | data_len = cmd->se_cmd.data_length; |
b8d26b3b | 1062 | |
9fd60088 JD |
1063 | if (imm_data && imm_data_len == data_len) |
1064 | cmd->se_cmd.se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
b8d26b3b NB |
1065 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); |
1066 | if (rc < 0) { | |
1067 | return 0; | |
1068 | } else if (rc > 0) { | |
1069 | dump_payload = true; | |
1070 | goto sequence_cmd; | |
1071 | } | |
1072 | ||
1073 | if (!imm_data) | |
1074 | return 0; | |
1075 | ||
9fd60088 JD |
1076 | if (imm_data_len != data_len) { |
1077 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1078 | sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents, | |
0b089c1e | 1079 | isert_get_data(rx_desc), imm_data_len); |
9fd60088 JD |
1080 | isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n", |
1081 | sg_nents, imm_data_len); | |
1082 | } else { | |
1083 | sg_init_table(&isert_cmd->sg, 1); | |
1084 | cmd->se_cmd.t_data_sg = &isert_cmd->sg; | |
1085 | cmd->se_cmd.t_data_nents = 1; | |
0b089c1e SG |
1086 | sg_set_buf(&isert_cmd->sg, isert_get_data(rx_desc), |
1087 | imm_data_len); | |
9fd60088 JD |
1088 | isert_dbg("Transfer Immediate imm_data_len: %d\n", |
1089 | imm_data_len); | |
1090 | } | |
b8d26b3b NB |
1091 | |
1092 | cmd->write_data_done += imm_data_len; | |
1093 | ||
1094 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1095 | spin_lock_bh(&cmd->istate_lock); | |
1096 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1097 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1098 | spin_unlock_bh(&cmd->istate_lock); | |
1099 | } | |
1100 | ||
1101 | sequence_cmd: | |
561bf158 | 1102 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b | 1103 | |
f7a95c90 | 1104 | if (!rc && !dump_payload && unsol_data) |
0300b114 | 1105 | iscsit_set_unsolicited_dataout(cmd); |
6cc44a6f | 1106 | else if (dump_payload && imm_data) |
afc16604 | 1107 | target_put_sess_cmd(&cmd->se_cmd); |
b8d26b3b | 1108 | |
b8d26b3b NB |
1109 | return 0; |
1110 | } | |
1111 | ||
1112 | static int | |
1113 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1114 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1115 | { | |
1116 | struct scatterlist *sg_start; | |
1117 | struct iscsi_conn *conn = isert_conn->conn; | |
1118 | struct iscsi_cmd *cmd = NULL; | |
1119 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1120 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1121 | int rc, sg_nents, sg_off, page_off; | |
1122 | ||
1123 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1124 | if (rc < 0) | |
1125 | return rc; | |
1126 | else if (!cmd) | |
1127 | return 0; | |
1128 | /* | |
1129 | * FIXME: Unexpected unsolicited_data out | |
1130 | */ | |
1131 | if (!cmd->unsolicited_data) { | |
24f412dd | 1132 | isert_err("Received unexpected solicited data payload\n"); |
b8d26b3b NB |
1133 | dump_stack(); |
1134 | return -1; | |
1135 | } | |
1136 | ||
4c22e07f SG |
1137 | isert_dbg("Unsolicited DataOut unsol_data_len: %u, " |
1138 | "write_data_done: %u, data_length: %u\n", | |
1139 | unsol_data_len, cmd->write_data_done, | |
1140 | cmd->se_cmd.data_length); | |
b8d26b3b NB |
1141 | |
1142 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1143 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1144 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1145 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1146 | /* | |
1147 | * FIXME: Non page-aligned unsolicited_data out | |
1148 | */ | |
1149 | if (page_off) { | |
4c22e07f | 1150 | isert_err("unexpected non-page aligned data payload\n"); |
b8d26b3b NB |
1151 | dump_stack(); |
1152 | return -1; | |
1153 | } | |
4c22e07f SG |
1154 | isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " |
1155 | "sg_nents: %u from %p %u\n", sg_start, sg_off, | |
0b089c1e | 1156 | sg_nents, isert_get_data(rx_desc), unsol_data_len); |
b8d26b3b | 1157 | |
0b089c1e | 1158 | sg_copy_from_buffer(sg_start, sg_nents, isert_get_data(rx_desc), |
b8d26b3b NB |
1159 | unsol_data_len); |
1160 | ||
1161 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1162 | if (rc < 0) | |
1163 | return rc; | |
1164 | ||
4366b19c JD |
1165 | /* |
1166 | * multiple data-outs on the same command can arrive - | |
1167 | * so post the buffer before hand | |
1168 | */ | |
c97119b6 | 1169 | return isert_post_recv(isert_conn, rx_desc); |
b8d26b3b NB |
1170 | } |
1171 | ||
778de368 NB |
1172 | static int |
1173 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1174 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1175 | unsigned char *buf) | |
778de368 | 1176 | { |
778de368 NB |
1177 | struct iscsi_conn *conn = isert_conn->conn; |
1178 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1179 | int rc; | |
1180 | ||
1181 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1182 | if (rc < 0) | |
1183 | return rc; | |
1184 | /* | |
1185 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1186 | */ | |
1187 | ||
1188 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1189 | } | |
1190 | ||
adb54c29 NB |
1191 | static int |
1192 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1193 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1194 | struct iscsi_text *hdr) | |
adb54c29 | 1195 | { |
adb54c29 NB |
1196 | struct iscsi_conn *conn = isert_conn->conn; |
1197 | u32 payload_length = ntoh24(hdr->dlength); | |
1198 | int rc; | |
b44a2b67 | 1199 | unsigned char *text_in = NULL; |
adb54c29 NB |
1200 | |
1201 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1202 | if (rc < 0) | |
1203 | return rc; | |
1204 | ||
b44a2b67 SG |
1205 | if (payload_length) { |
1206 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
93b80f29 | 1207 | if (!text_in) |
b44a2b67 | 1208 | return -ENOMEM; |
adb54c29 NB |
1209 | } |
1210 | cmd->text_in_ptr = text_in; | |
1211 | ||
0b089c1e | 1212 | memcpy(cmd->text_in_ptr, isert_get_data(rx_desc), payload_length); |
adb54c29 NB |
1213 | |
1214 | return iscsit_process_text_cmd(conn, cmd, hdr); | |
1215 | } | |
1216 | ||
b8d26b3b NB |
1217 | static int |
1218 | isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, | |
1219 | uint32_t read_stag, uint64_t read_va, | |
1220 | uint32_t write_stag, uint64_t write_va) | |
1221 | { | |
0b089c1e | 1222 | struct iscsi_hdr *hdr = isert_get_iscsi_hdr(rx_desc); |
b8d26b3b NB |
1223 | struct iscsi_conn *conn = isert_conn->conn; |
1224 | struct iscsi_cmd *cmd; | |
1225 | struct isert_cmd *isert_cmd; | |
1226 | int ret = -EINVAL; | |
1227 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1228 | ||
fb140271 | 1229 | if (conn->sess->sess_ops->SessionType && |
ca40d24e | 1230 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { |
24f412dd | 1231 | isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," |
4c22e07f | 1232 | " ignoring\n", opcode); |
ca40d24e NB |
1233 | return 0; |
1234 | } | |
1235 | ||
b8d26b3b NB |
1236 | switch (opcode) { |
1237 | case ISCSI_OP_SCSI_CMD: | |
4366b19c | 1238 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1239 | if (!cmd) |
1240 | break; | |
1241 | ||
d703ce2f | 1242 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1243 | isert_cmd->read_stag = read_stag; |
1244 | isert_cmd->read_va = read_va; | |
1245 | isert_cmd->write_stag = write_stag; | |
1246 | isert_cmd->write_va = write_va; | |
422bd0ac | 1247 | isert_cmd->inv_rkey = read_stag ? read_stag : write_stag; |
b8d26b3b | 1248 | |
d703ce2f | 1249 | ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, |
b8d26b3b NB |
1250 | rx_desc, (unsigned char *)hdr); |
1251 | break; | |
1252 | case ISCSI_OP_NOOP_OUT: | |
4366b19c | 1253 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1254 | if (!cmd) |
1255 | break; | |
1256 | ||
d703ce2f NB |
1257 | isert_cmd = iscsit_priv_cmd(cmd); |
1258 | ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, | |
778de368 | 1259 | rx_desc, (unsigned char *)hdr); |
b8d26b3b NB |
1260 | break; |
1261 | case ISCSI_OP_SCSI_DATA_OUT: | |
1262 | ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, | |
1263 | (unsigned char *)hdr); | |
1264 | break; | |
1265 | case ISCSI_OP_SCSI_TMFUNC: | |
4366b19c | 1266 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1267 | if (!cmd) |
1268 | break; | |
1269 | ||
1270 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, | |
1271 | (unsigned char *)hdr); | |
1272 | break; | |
1273 | case ISCSI_OP_LOGOUT: | |
4366b19c | 1274 | cmd = isert_allocate_cmd(conn, rx_desc); |
b8d26b3b NB |
1275 | if (!cmd) |
1276 | break; | |
1277 | ||
1278 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
b8d26b3b | 1279 | break; |
adb54c29 | 1280 | case ISCSI_OP_TEXT: |
4366b19c | 1281 | if (be32_to_cpu(hdr->ttt) != 0xFFFFFFFF) |
e4f4e801 | 1282 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); |
4366b19c JD |
1283 | else |
1284 | cmd = isert_allocate_cmd(conn, rx_desc); | |
1285 | ||
1286 | if (!cmd) | |
1287 | break; | |
adb54c29 | 1288 | |
d703ce2f NB |
1289 | isert_cmd = iscsit_priv_cmd(cmd); |
1290 | ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, | |
adb54c29 NB |
1291 | rx_desc, (struct iscsi_text *)hdr); |
1292 | break; | |
b8d26b3b | 1293 | default: |
24f412dd | 1294 | isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); |
b8d26b3b NB |
1295 | dump_stack(); |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | return ret; | |
1300 | } | |
1301 | ||
1302 | static void | |
9679cc51 | 1303 | isert_print_wc(struct ib_wc *wc, const char *type) |
b8d26b3b | 1304 | { |
9679cc51 CH |
1305 | if (wc->status != IB_WC_WR_FLUSH_ERR) |
1306 | isert_err("%s failure: %s (%d) vend_err %x\n", type, | |
1307 | ib_wc_status_msg(wc->status), wc->status, | |
1308 | wc->vendor_err); | |
1309 | else | |
1310 | isert_dbg("%s failure: %s (%d)\n", type, | |
1311 | ib_wc_status_msg(wc->status), wc->status); | |
1312 | } | |
1313 | ||
1314 | static void | |
1315 | isert_recv_done(struct ib_cq *cq, struct ib_wc *wc) | |
1316 | { | |
1317 | struct isert_conn *isert_conn = wc->qp->qp_context; | |
1318 | struct ib_device *ib_dev = isert_conn->cm_id->device; | |
1319 | struct iser_rx_desc *rx_desc = cqe_to_rx_desc(wc->wr_cqe); | |
0b089c1e SG |
1320 | struct iscsi_hdr *hdr = isert_get_iscsi_hdr(rx_desc); |
1321 | struct iser_ctrl *iser_ctrl = isert_get_iser_hdr(rx_desc); | |
b8d26b3b NB |
1322 | uint64_t read_va = 0, write_va = 0; |
1323 | uint32_t read_stag = 0, write_stag = 0; | |
b8d26b3b | 1324 | |
9679cc51 CH |
1325 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1326 | isert_print_wc(wc, "recv"); | |
1327 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1328 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1329 | return; | |
1330 | } | |
1331 | ||
7a56dc88 SG |
1332 | rx_desc->in_use = true; |
1333 | ||
9679cc51 | 1334 | ib_dma_sync_single_for_cpu(ib_dev, rx_desc->dma_addr, |
0b089c1e | 1335 | ISER_RX_SIZE, DMA_FROM_DEVICE); |
9679cc51 CH |
1336 | |
1337 | isert_dbg("DMA: 0x%llx, iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", | |
1338 | rx_desc->dma_addr, hdr->opcode, hdr->itt, hdr->flags, | |
1339 | (int)(wc->byte_len - ISER_HEADERS_LEN)); | |
1340 | ||
d3cf81f9 | 1341 | switch (iser_ctrl->flags & 0xF0) { |
b8d26b3b | 1342 | case ISCSI_CTRL: |
d3cf81f9 SG |
1343 | if (iser_ctrl->flags & ISER_RSV) { |
1344 | read_stag = be32_to_cpu(iser_ctrl->read_stag); | |
1345 | read_va = be64_to_cpu(iser_ctrl->read_va); | |
4c22e07f SG |
1346 | isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", |
1347 | read_stag, (unsigned long long)read_va); | |
b8d26b3b | 1348 | } |
d3cf81f9 SG |
1349 | if (iser_ctrl->flags & ISER_WSV) { |
1350 | write_stag = be32_to_cpu(iser_ctrl->write_stag); | |
1351 | write_va = be64_to_cpu(iser_ctrl->write_va); | |
4c22e07f SG |
1352 | isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", |
1353 | write_stag, (unsigned long long)write_va); | |
b8d26b3b NB |
1354 | } |
1355 | ||
24f412dd | 1356 | isert_dbg("ISER ISCSI_CTRL PDU\n"); |
b8d26b3b NB |
1357 | break; |
1358 | case ISER_HELLO: | |
24f412dd | 1359 | isert_err("iSER Hello message\n"); |
b8d26b3b NB |
1360 | break; |
1361 | default: | |
d3cf81f9 | 1362 | isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_ctrl->flags); |
b8d26b3b NB |
1363 | break; |
1364 | } | |
1365 | ||
6c760b3d BVA |
1366 | isert_rx_opcode(isert_conn, rx_desc, |
1367 | read_stag, read_va, write_stag, write_va); | |
9679cc51 CH |
1368 | |
1369 | ib_dma_sync_single_for_device(ib_dev, rx_desc->dma_addr, | |
0b089c1e | 1370 | ISER_RX_SIZE, DMA_FROM_DEVICE); |
b8d26b3b NB |
1371 | } |
1372 | ||
1373 | static void | |
9679cc51 | 1374 | isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1375 | { |
9679cc51 | 1376 | struct isert_conn *isert_conn = wc->qp->qp_context; |
fce50a2f | 1377 | struct ib_device *ib_dev = isert_conn->device->ib_device; |
9679cc51 CH |
1378 | |
1379 | if (unlikely(wc->status != IB_WC_SUCCESS)) { | |
1380 | isert_print_wc(wc, "login recv"); | |
1381 | return; | |
b8d26b3b NB |
1382 | } |
1383 | ||
0b089c1e SG |
1384 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_desc->dma_addr, |
1385 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b | 1386 | |
9679cc51 | 1387 | isert_conn->login_req_len = wc->byte_len - ISER_HEADERS_LEN; |
b8d26b3b | 1388 | |
9679cc51 CH |
1389 | if (isert_conn->conn) { |
1390 | struct iscsi_login *login = isert_conn->conn->conn_login; | |
2371e5da | 1391 | |
9679cc51 CH |
1392 | if (login && !login->first_request) |
1393 | isert_rx_login_req(isert_conn); | |
2371e5da | 1394 | } |
b8d26b3b | 1395 | |
9679cc51 CH |
1396 | mutex_lock(&isert_conn->mutex); |
1397 | complete(&isert_conn->login_req_comp); | |
1398 | mutex_unlock(&isert_conn->mutex); | |
b8d26b3b | 1399 | |
0b089c1e SG |
1400 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_desc->dma_addr, |
1401 | ISER_RX_SIZE, DMA_FROM_DEVICE); | |
b8d26b3b NB |
1402 | } |
1403 | ||
1404 | static void | |
38a2d0d4 | 1405 | isert_rdma_rw_ctx_destroy(struct isert_cmd *cmd, struct isert_conn *conn) |
b8d26b3b | 1406 | { |
38a2d0d4 CH |
1407 | struct se_cmd *se_cmd = &cmd->iscsi_cmd->se_cmd; |
1408 | enum dma_data_direction dir = target_reverse_dma_direction(se_cmd); | |
b8d26b3b | 1409 | |
38a2d0d4 CH |
1410 | if (!cmd->rw.nr_ops) |
1411 | return; | |
59464ef4 | 1412 | |
38a2d0d4 CH |
1413 | if (isert_prot_cmd(conn, se_cmd)) { |
1414 | rdma_rw_ctx_destroy_signature(&cmd->rw, conn->qp, | |
1415 | conn->cm_id->port_num, se_cmd->t_data_sg, | |
1416 | se_cmd->t_data_nents, se_cmd->t_prot_sg, | |
1417 | se_cmd->t_prot_nents, dir); | |
1418 | } else { | |
1419 | rdma_rw_ctx_destroy(&cmd->rw, conn->qp, conn->cm_id->port_num, | |
1420 | se_cmd->t_data_sg, se_cmd->t_data_nents, dir); | |
59464ef4 VP |
1421 | } |
1422 | ||
38a2d0d4 | 1423 | cmd->rw.nr_ops = 0; |
59464ef4 VP |
1424 | } |
1425 | ||
b8d26b3b | 1426 | static void |
03e7848a | 1427 | isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) |
b8d26b3b | 1428 | { |
d703ce2f | 1429 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1430 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1431 | struct iscsi_conn *conn = isert_conn->conn; |
e4f4e801 | 1432 | struct iscsi_text_rsp *hdr; |
b8d26b3b | 1433 | |
4c22e07f | 1434 | isert_dbg("Cmd %p\n", isert_cmd); |
b8d26b3b NB |
1435 | |
1436 | switch (cmd->iscsi_opcode) { | |
1437 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1438 | spin_lock_bh(&conn->cmd_lock); |
1439 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1440 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1441 | spin_unlock_bh(&conn->cmd_lock); |
1442 | ||
03e7848a | 1443 | if (cmd->data_direction == DMA_TO_DEVICE) { |
b8d26b3b | 1444 | iscsit_stop_dataout_timer(cmd); |
03e7848a NB |
1445 | /* |
1446 | * Check for special case during comp_err where | |
1447 | * WRITE_PENDING has been handed off from core, | |
1448 | * but requires an extra target_put_sess_cmd() | |
1449 | * before transport_generic_free_cmd() below. | |
1450 | */ | |
1451 | if (comp_err && | |
1452 | cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { | |
1453 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
1454 | ||
afc16604 | 1455 | target_put_sess_cmd(se_cmd); |
03e7848a NB |
1456 | } |
1457 | } | |
b8d26b3b | 1458 | |
38a2d0d4 | 1459 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
186a9647 NB |
1460 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1461 | break; | |
b8d26b3b | 1462 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1463 | spin_lock_bh(&conn->cmd_lock); |
1464 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1465 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1466 | spin_unlock_bh(&conn->cmd_lock); |
1467 | ||
b8d26b3b NB |
1468 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1469 | break; | |
1470 | case ISCSI_OP_REJECT: | |
1471 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1472 | case ISCSI_OP_TEXT: |
e4f4e801 SG |
1473 | hdr = (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; |
1474 | /* If the continue bit is on, keep the command alive */ | |
1475 | if (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE) | |
1476 | break; | |
1477 | ||
b8d26b3b NB |
1478 | spin_lock_bh(&conn->cmd_lock); |
1479 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1480 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1481 | spin_unlock_bh(&conn->cmd_lock); |
1482 | ||
1483 | /* | |
1484 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1485 | * overwritten the original iscsi_opcode assignment, and the | |
1486 | * associated cmd->se_cmd needs to be released. | |
1487 | */ | |
1488 | if (cmd->se_cmd.se_tfo != NULL) { | |
11378cdb | 1489 | isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", |
3df8f68a | 1490 | cmd->iscsi_opcode); |
b8d26b3b NB |
1491 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1492 | break; | |
1493 | } | |
df561f66 | 1494 | fallthrough; |
b8d26b3b | 1495 | default: |
d703ce2f | 1496 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1497 | break; |
1498 | } | |
1499 | } | |
1500 | ||
1501 | static void | |
1502 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1503 | { | |
1504 | if (tx_desc->dma_addr != 0) { | |
4c22e07f | 1505 | isert_dbg("unmap single for tx_desc->dma_addr\n"); |
b8d26b3b NB |
1506 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, |
1507 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1508 | tx_desc->dma_addr = 0; | |
1509 | } | |
1510 | } | |
1511 | ||
1512 | static void | |
1513 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
03e7848a | 1514 | struct ib_device *ib_dev, bool comp_err) |
b8d26b3b | 1515 | { |
dbbc5d11 | 1516 | if (isert_cmd->pdu_buf_dma != 0) { |
4c22e07f | 1517 | isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); |
dbbc5d11 NB |
1518 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, |
1519 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1520 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1521 | } |
1522 | ||
1523 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
03e7848a | 1524 | isert_put_cmd(isert_cmd, comp_err); |
b8d26b3b NB |
1525 | } |
1526 | ||
96b7973e SG |
1527 | static int |
1528 | isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) | |
1529 | { | |
1530 | struct ib_mr_status mr_status; | |
1531 | int ret; | |
1532 | ||
1533 | ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); | |
1534 | if (ret) { | |
24f412dd | 1535 | isert_err("ib_check_mr_status failed, ret %d\n", ret); |
96b7973e SG |
1536 | goto fail_mr_status; |
1537 | } | |
1538 | ||
1539 | if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { | |
1540 | u64 sec_offset_err; | |
1541 | u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; | |
1542 | ||
1543 | switch (mr_status.sig_err.err_type) { | |
1544 | case IB_SIG_BAD_GUARD: | |
1545 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; | |
1546 | break; | |
1547 | case IB_SIG_BAD_REFTAG: | |
1548 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; | |
1549 | break; | |
1550 | case IB_SIG_BAD_APPTAG: | |
1551 | se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; | |
1552 | break; | |
1553 | } | |
1554 | sec_offset_err = mr_status.sig_err.sig_err_offset; | |
1555 | do_div(sec_offset_err, block_size); | |
8dd992fb | 1556 | se_cmd->sense_info = sec_offset_err + se_cmd->t_task_lba; |
96b7973e | 1557 | |
4c22e07f SG |
1558 | isert_err("PI error found type %d at sector 0x%llx " |
1559 | "expected 0x%x vs actual 0x%x\n", | |
1560 | mr_status.sig_err.err_type, | |
8dd992fb | 1561 | (unsigned long long)se_cmd->sense_info, |
4c22e07f SG |
1562 | mr_status.sig_err.expected, |
1563 | mr_status.sig_err.actual); | |
96b7973e SG |
1564 | ret = 1; |
1565 | } | |
1566 | ||
1567 | fail_mr_status: | |
1568 | return ret; | |
1569 | } | |
1570 | ||
f93f3a70 | 1571 | static void |
9679cc51 | 1572 | isert_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc) |
f93f3a70 | 1573 | { |
9679cc51 | 1574 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1575 | struct isert_device *device = isert_conn->device; |
9679cc51 | 1576 | struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe); |
e3416ab2 | 1577 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc); |
9679cc51 | 1578 | struct se_cmd *cmd = &isert_cmd->iscsi_cmd->se_cmd; |
9e961ae7 SG |
1579 | int ret = 0; |
1580 | ||
9679cc51 CH |
1581 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1582 | isert_print_wc(wc, "rdma write"); | |
1583 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1584 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1585 | isert_completion_put(desc, isert_cmd, device->ib_device, true); | |
1586 | return; | |
1587 | } | |
1588 | ||
1589 | isert_dbg("Cmd %p\n", isert_cmd); | |
1590 | ||
e9a53e73 | 1591 | ret = isert_check_pi_status(cmd, isert_cmd->rw.reg->mr); |
38a2d0d4 | 1592 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
f93f3a70 | 1593 | |
555a65f6 NB |
1594 | if (ret) { |
1595 | /* | |
1596 | * transport_generic_request_failure() expects to have | |
1597 | * plus two references to handle queue-full, so re-add | |
1598 | * one here as target-core will have already dropped | |
1599 | * it after the first isert_put_datain() callback. | |
1600 | */ | |
1601 | kref_get(&cmd->cmd_kref); | |
1602 | transport_generic_request_failure(cmd, cmd->pi_err); | |
1603 | } else { | |
1604 | /* | |
1605 | * XXX: isert_put_response() failure is not retried. | |
1606 | */ | |
1607 | ret = isert_put_response(isert_conn->conn, isert_cmd->iscsi_cmd); | |
1608 | if (ret) | |
1609 | pr_warn_ratelimited("isert_put_response() ret: %d\n", ret); | |
1610 | } | |
f93f3a70 SG |
1611 | } |
1612 | ||
b8d26b3b | 1613 | static void |
9679cc51 | 1614 | isert_rdma_read_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1615 | { |
9679cc51 CH |
1616 | struct isert_conn *isert_conn = wc->qp->qp_context; |
1617 | struct isert_device *device = isert_conn->device; | |
1618 | struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe); | |
e3416ab2 | 1619 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc); |
d703ce2f | 1620 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1621 | struct se_cmd *se_cmd = &cmd->se_cmd; |
5bac4b1a | 1622 | int ret = 0; |
b8d26b3b | 1623 | |
9679cc51 CH |
1624 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1625 | isert_print_wc(wc, "rdma read"); | |
1626 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1627 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1628 | isert_completion_put(desc, isert_cmd, device->ib_device, true); | |
1629 | return; | |
1630 | } | |
1631 | ||
1632 | isert_dbg("Cmd %p\n", isert_cmd); | |
1633 | ||
b8d26b3b | 1634 | iscsit_stop_dataout_timer(cmd); |
38a2d0d4 CH |
1635 | |
1636 | if (isert_prot_cmd(isert_conn, se_cmd)) | |
e9a53e73 | 1637 | ret = isert_check_pi_status(se_cmd, isert_cmd->rw.reg->mr); |
38a2d0d4 CH |
1638 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
1639 | cmd->write_data_done = 0; | |
b8d26b3b | 1640 | |
24f412dd | 1641 | isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1642 | spin_lock_bh(&cmd->istate_lock); |
1643 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1644 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1645 | spin_unlock_bh(&cmd->istate_lock); | |
1646 | ||
555a65f6 NB |
1647 | /* |
1648 | * transport_generic_request_failure() will drop the extra | |
1649 | * se_cmd->cmd_kref reference after T10-PI error, and handle | |
1650 | * any non-zero ->queue_status() callback error retries. | |
1651 | */ | |
1652 | if (ret) | |
1653 | transport_generic_request_failure(se_cmd, se_cmd->pi_err); | |
1654 | else | |
5bac4b1a | 1655 | target_execute_cmd(se_cmd); |
b8d26b3b NB |
1656 | } |
1657 | ||
1658 | static void | |
1659 | isert_do_control_comp(struct work_struct *work) | |
1660 | { | |
1661 | struct isert_cmd *isert_cmd = container_of(work, | |
1662 | struct isert_cmd, comp_work); | |
1663 | struct isert_conn *isert_conn = isert_cmd->conn; | |
dac6ab30 | 1664 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
d703ce2f | 1665 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1666 | |
4c22e07f SG |
1667 | isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); |
1668 | ||
b8d26b3b NB |
1669 | switch (cmd->i_state) { |
1670 | case ISTATE_SEND_TASKMGTRSP: | |
b8d26b3b | 1671 | iscsit_tmr_post_handler(cmd, cmd->conn); |
df561f66 | 1672 | fallthrough; |
d2271bd0 BVA |
1673 | case ISTATE_SEND_REJECT: |
1674 | case ISTATE_SEND_TEXTRSP: | |
b8d26b3b | 1675 | cmd->i_state = ISTATE_SENT_STATUS; |
4c22e07f SG |
1676 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, |
1677 | ib_dev, false); | |
3df8f68a | 1678 | break; |
b8d26b3b | 1679 | case ISTATE_SEND_LOGOUTRSP: |
b8d26b3b NB |
1680 | iscsit_logout_post_handler(cmd, cmd->conn); |
1681 | break; | |
1682 | default: | |
4c22e07f | 1683 | isert_err("Unknown i_state %d\n", cmd->i_state); |
b8d26b3b NB |
1684 | dump_stack(); |
1685 | break; | |
1686 | } | |
1687 | } | |
1688 | ||
1689 | static void | |
9679cc51 | 1690 | isert_login_send_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1691 | { |
9679cc51 CH |
1692 | struct isert_conn *isert_conn = wc->qp->qp_context; |
1693 | struct ib_device *ib_dev = isert_conn->cm_id->device; | |
1694 | struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe); | |
b8d26b3b | 1695 | |
9679cc51 CH |
1696 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1697 | isert_print_wc(wc, "login send"); | |
1698 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1699 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
b8d26b3b | 1700 | } |
897bb2c9 | 1701 | |
9679cc51 | 1702 | isert_unmap_tx_desc(tx_desc, ib_dev); |
b8d26b3b NB |
1703 | } |
1704 | ||
1705 | static void | |
9679cc51 | 1706 | isert_send_done(struct ib_cq *cq, struct ib_wc *wc) |
b8d26b3b | 1707 | { |
9679cc51 | 1708 | struct isert_conn *isert_conn = wc->qp->qp_context; |
dac6ab30 | 1709 | struct ib_device *ib_dev = isert_conn->cm_id->device; |
9679cc51 | 1710 | struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe); |
e3416ab2 | 1711 | struct isert_cmd *isert_cmd = tx_desc_to_cmd(tx_desc); |
b8d26b3b | 1712 | |
9679cc51 CH |
1713 | if (unlikely(wc->status != IB_WC_SUCCESS)) { |
1714 | isert_print_wc(wc, "send"); | |
1715 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
1716 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
1717 | isert_completion_put(tx_desc, isert_cmd, ib_dev, true); | |
b8d26b3b NB |
1718 | return; |
1719 | } | |
b8d26b3b | 1720 | |
9679cc51 | 1721 | isert_dbg("Cmd %p\n", isert_cmd); |
4c22e07f | 1722 | |
9679cc51 CH |
1723 | switch (isert_cmd->iscsi_cmd->i_state) { |
1724 | case ISTATE_SEND_TASKMGTRSP: | |
1725 | case ISTATE_SEND_LOGOUTRSP: | |
1726 | case ISTATE_SEND_REJECT: | |
1727 | case ISTATE_SEND_TEXTRSP: | |
1728 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
1729 | ||
1730 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1731 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1732 | return; | |
b8d26b3b | 1733 | default: |
9679cc51 CH |
1734 | isert_cmd->iscsi_cmd->i_state = ISTATE_SENT_STATUS; |
1735 | isert_completion_put(tx_desc, isert_cmd, ib_dev, false); | |
b8d26b3b NB |
1736 | break; |
1737 | } | |
1738 | } | |
1739 | ||
b8d26b3b NB |
1740 | static int |
1741 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
1742 | { | |
b8d26b3b NB |
1743 | int ret; |
1744 | ||
4366b19c | 1745 | ret = isert_post_recv(isert_conn, isert_cmd->rx_desc); |
c97119b6 | 1746 | if (ret) |
4366b19c | 1747 | return ret; |
4366b19c | 1748 | |
e01a7674 | 1749 | ret = ib_post_send(isert_conn->qp, &isert_cmd->tx_desc.send_wr, NULL); |
b8d26b3b | 1750 | if (ret) { |
24f412dd | 1751 | isert_err("ib_post_send failed with %d\n", ret); |
b8d26b3b NB |
1752 | return ret; |
1753 | } | |
1754 | return ret; | |
1755 | } | |
1756 | ||
1757 | static int | |
1758 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
1759 | { | |
d703ce2f | 1760 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1761 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1762 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1763 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
1764 | &isert_cmd->tx_desc.iscsi_header; | |
1765 | ||
1766 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1767 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
1768 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
1769 | /* | |
1770 | * Attach SENSE DATA payload to iSCSI Response PDU | |
1771 | */ | |
1772 | if (cmd->se_cmd.sense_buffer && | |
1773 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
1774 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
dac6ab30 | 1775 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1776 | struct ib_device *ib_dev = device->ib_device; |
b8d26b3b | 1777 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
dbbc5d11 | 1778 | u32 padding, pdu_len; |
b8d26b3b NB |
1779 | |
1780 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
1781 | cmd->sense_buffer); | |
1782 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
1783 | ||
1784 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
1785 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 1786 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 1787 | |
dbbc5d11 NB |
1788 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
1789 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b | 1790 | DMA_TO_DEVICE); |
def4a6ff AK |
1791 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
1792 | return -ENOMEM; | |
b8d26b3b | 1793 | |
dbbc5d11 NB |
1794 | isert_cmd->pdu_buf_len = pdu_len; |
1795 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
1796 | tx_dsg->length = pdu_len; | |
34efc7df | 1797 | tx_dsg->lkey = device->pd->local_dma_lkey; |
b8d26b3b NB |
1798 | isert_cmd->tx_desc.num_sge = 2; |
1799 | } | |
1800 | ||
68a86dee | 1801 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1802 | |
4c22e07f | 1803 | isert_dbg("Posting SCSI Response\n"); |
b8d26b3b NB |
1804 | |
1805 | return isert_post_response(isert_conn, isert_cmd); | |
1806 | } | |
1807 | ||
131e6abc NB |
1808 | static void |
1809 | isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
1810 | { | |
1811 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
6700425e | 1812 | struct isert_conn *isert_conn = conn->context; |
131e6abc NB |
1813 | |
1814 | spin_lock_bh(&conn->cmd_lock); | |
1815 | if (!list_empty(&cmd->i_conn_node)) | |
1816 | list_del_init(&cmd->i_conn_node); | |
1817 | spin_unlock_bh(&conn->cmd_lock); | |
1818 | ||
1819 | if (cmd->data_direction == DMA_TO_DEVICE) | |
1820 | iscsit_stop_dataout_timer(cmd); | |
38a2d0d4 | 1821 | isert_rdma_rw_ctx_destroy(isert_cmd, isert_conn); |
131e6abc NB |
1822 | } |
1823 | ||
e70beee7 NB |
1824 | static enum target_prot_op |
1825 | isert_get_sup_prot_ops(struct iscsi_conn *conn) | |
1826 | { | |
6700425e | 1827 | struct isert_conn *isert_conn = conn->context; |
dac6ab30 | 1828 | struct isert_device *device = isert_conn->device; |
e70beee7 | 1829 | |
23a548ee SG |
1830 | if (conn->tpg->tpg_attrib.t10_pi) { |
1831 | if (device->pi_capable) { | |
24f412dd | 1832 | isert_info("conn %p PI offload enabled\n", isert_conn); |
23a548ee SG |
1833 | isert_conn->pi_support = true; |
1834 | return TARGET_PROT_ALL; | |
1835 | } | |
1836 | } | |
1837 | ||
24f412dd | 1838 | isert_info("conn %p PI offload disabled\n", isert_conn); |
23a548ee | 1839 | isert_conn->pi_support = false; |
e70beee7 NB |
1840 | |
1841 | return TARGET_PROT_NORMAL; | |
1842 | } | |
1843 | ||
b8d26b3b NB |
1844 | static int |
1845 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
1846 | bool nopout_response) | |
1847 | { | |
d703ce2f | 1848 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1849 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1850 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1851 | ||
1852 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1853 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
1854 | &isert_cmd->tx_desc.iscsi_header, | |
1855 | nopout_response); | |
1856 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1857 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1858 | |
4c22e07f | 1859 | isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); |
b8d26b3b NB |
1860 | |
1861 | return isert_post_response(isert_conn, isert_cmd); | |
1862 | } | |
1863 | ||
1864 | static int | |
1865 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1866 | { | |
d703ce2f | 1867 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1868 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1869 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1870 | ||
1871 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1872 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
1873 | &isert_cmd->tx_desc.iscsi_header); | |
1874 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1875 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1876 | |
4c22e07f | 1877 | isert_dbg("conn %p Posting Logout Response\n", isert_conn); |
b8d26b3b NB |
1878 | |
1879 | return isert_post_response(isert_conn, isert_cmd); | |
1880 | } | |
1881 | ||
1882 | static int | |
1883 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1884 | { | |
d703ce2f | 1885 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1886 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
1887 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1888 | ||
1889 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1890 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
1891 | &isert_cmd->tx_desc.iscsi_header); | |
1892 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
68a86dee | 1893 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1894 | |
4c22e07f | 1895 | isert_dbg("conn %p Posting Task Management Response\n", isert_conn); |
b8d26b3b NB |
1896 | |
1897 | return isert_post_response(isert_conn, isert_cmd); | |
1898 | } | |
1899 | ||
1900 | static int | |
1901 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1902 | { | |
d703ce2f | 1903 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1904 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b | 1905 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
dac6ab30 | 1906 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1907 | struct ib_device *ib_dev = device->ib_device; |
3df8f68a NB |
1908 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
1909 | struct iscsi_reject *hdr = | |
1910 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
1911 | |
1912 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 1913 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 1914 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
1915 | |
1916 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 1917 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
1918 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
1919 | DMA_TO_DEVICE); | |
def4a6ff AK |
1920 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
1921 | return -ENOMEM; | |
dbbc5d11 NB |
1922 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
1923 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a | 1924 | tx_dsg->length = ISCSI_HDR_LEN; |
34efc7df | 1925 | tx_dsg->lkey = device->pd->local_dma_lkey; |
3df8f68a NB |
1926 | isert_cmd->tx_desc.num_sge = 2; |
1927 | ||
68a86dee | 1928 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
b8d26b3b | 1929 | |
4c22e07f | 1930 | isert_dbg("conn %p Posting Reject\n", isert_conn); |
b8d26b3b NB |
1931 | |
1932 | return isert_post_response(isert_conn, isert_cmd); | |
1933 | } | |
1934 | ||
adb54c29 NB |
1935 | static int |
1936 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1937 | { | |
d703ce2f | 1938 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 1939 | struct isert_conn *isert_conn = conn->context; |
adb54c29 NB |
1940 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; |
1941 | struct iscsi_text_rsp *hdr = | |
1942 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
1943 | u32 txt_rsp_len; | |
1944 | int rc; | |
1945 | ||
1946 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
22c7aaa5 | 1947 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); |
adb54c29 NB |
1948 | if (rc < 0) |
1949 | return rc; | |
1950 | ||
1951 | txt_rsp_len = rc; | |
1952 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
1953 | ||
1954 | if (txt_rsp_len) { | |
dac6ab30 | 1955 | struct isert_device *device = isert_conn->device; |
67cb3949 | 1956 | struct ib_device *ib_dev = device->ib_device; |
adb54c29 NB |
1957 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; |
1958 | void *txt_rsp_buf = cmd->buf_ptr; | |
1959 | ||
1960 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
1961 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
def4a6ff AK |
1962 | if (ib_dma_mapping_error(ib_dev, isert_cmd->pdu_buf_dma)) |
1963 | return -ENOMEM; | |
adb54c29 NB |
1964 | |
1965 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
1966 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
1967 | tx_dsg->length = txt_rsp_len; | |
34efc7df | 1968 | tx_dsg->lkey = device->pd->local_dma_lkey; |
adb54c29 NB |
1969 | isert_cmd->tx_desc.num_sge = 2; |
1970 | } | |
68a86dee | 1971 | isert_init_send_wr(isert_conn, isert_cmd, send_wr); |
adb54c29 | 1972 | |
f64d2792 | 1973 | isert_dbg("conn %p Text Response\n", isert_conn); |
adb54c29 NB |
1974 | |
1975 | return isert_post_response(isert_conn, isert_cmd); | |
1976 | } | |
1977 | ||
3d73cf1a | 1978 | static inline void |
dae6345a | 1979 | isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_domain *domain) |
3d73cf1a | 1980 | { |
78eda2bb | 1981 | domain->sig_type = IB_SIG_TYPE_T10_DIF; |
3d73cf1a SG |
1982 | domain->sig.dif.bg_type = IB_T10DIF_CRC; |
1983 | domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; | |
1984 | domain->sig.dif.ref_tag = se_cmd->reftag_seed; | |
78eda2bb SG |
1985 | /* |
1986 | * At the moment we hard code those, but if in the future | |
1987 | * the target core would like to use it, we will take it | |
1988 | * from se_cmd. | |
1989 | */ | |
1990 | domain->sig.dif.apptag_check_mask = 0xffff; | |
1991 | domain->sig.dif.app_escape = true; | |
1992 | domain->sig.dif.ref_escape = true; | |
1993 | if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || | |
1994 | se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) | |
1995 | domain->sig.dif.ref_remap = true; | |
ec53a2a6 | 1996 | } |
3d73cf1a | 1997 | |
9e961ae7 SG |
1998 | static int |
1999 | isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) | |
2000 | { | |
38a2d0d4 CH |
2001 | memset(sig_attrs, 0, sizeof(*sig_attrs)); |
2002 | ||
9e961ae7 SG |
2003 | switch (se_cmd->prot_op) { |
2004 | case TARGET_PROT_DIN_INSERT: | |
2005 | case TARGET_PROT_DOUT_STRIP: | |
78eda2bb | 2006 | sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; |
dae6345a | 2007 | isert_set_dif_domain(se_cmd, &sig_attrs->wire); |
9e961ae7 SG |
2008 | break; |
2009 | case TARGET_PROT_DOUT_INSERT: | |
2010 | case TARGET_PROT_DIN_STRIP: | |
78eda2bb | 2011 | sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; |
dae6345a | 2012 | isert_set_dif_domain(se_cmd, &sig_attrs->mem); |
9e961ae7 SG |
2013 | break; |
2014 | case TARGET_PROT_DIN_PASS: | |
2015 | case TARGET_PROT_DOUT_PASS: | |
dae6345a IR |
2016 | isert_set_dif_domain(se_cmd, &sig_attrs->wire); |
2017 | isert_set_dif_domain(se_cmd, &sig_attrs->mem); | |
9e961ae7 SG |
2018 | break; |
2019 | default: | |
24f412dd | 2020 | isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); |
9e961ae7 SG |
2021 | return -EINVAL; |
2022 | } | |
2023 | ||
26232872 MG |
2024 | if (se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD) |
2025 | sig_attrs->check_mask |= IB_SIG_CHECK_GUARD; | |
2026 | if (se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG) | |
2027 | sig_attrs->check_mask |= IB_SIG_CHECK_APPTAG; | |
2028 | if (se_cmd->prot_checks & TARGET_DIF_CHECK_REFTAG) | |
2029 | sig_attrs->check_mask |= IB_SIG_CHECK_REFTAG; | |
2030 | ||
9e961ae7 SG |
2031 | return 0; |
2032 | } | |
2033 | ||
9e961ae7 | 2034 | static int |
38a2d0d4 CH |
2035 | isert_rdma_rw_ctx_post(struct isert_cmd *cmd, struct isert_conn *conn, |
2036 | struct ib_cqe *cqe, struct ib_send_wr *chain_wr) | |
2037 | { | |
2038 | struct se_cmd *se_cmd = &cmd->iscsi_cmd->se_cmd; | |
2039 | enum dma_data_direction dir = target_reverse_dma_direction(se_cmd); | |
2040 | u8 port_num = conn->cm_id->port_num; | |
2041 | u64 addr; | |
2042 | u32 rkey, offset; | |
9e961ae7 | 2043 | int ret; |
9e961ae7 | 2044 | |
66f53e6f BP |
2045 | if (cmd->ctx_init_done) |
2046 | goto rdma_ctx_post; | |
2047 | ||
38a2d0d4 CH |
2048 | if (dir == DMA_FROM_DEVICE) { |
2049 | addr = cmd->write_va; | |
2050 | rkey = cmd->write_stag; | |
2051 | offset = cmd->iscsi_cmd->write_data_done; | |
570db170 | 2052 | } else { |
38a2d0d4 CH |
2053 | addr = cmd->read_va; |
2054 | rkey = cmd->read_stag; | |
2055 | offset = 0; | |
570db170 | 2056 | } |
9e961ae7 | 2057 | |
38a2d0d4 CH |
2058 | if (isert_prot_cmd(conn, se_cmd)) { |
2059 | struct ib_sig_attrs sig_attrs; | |
59464ef4 | 2060 | |
38a2d0d4 CH |
2061 | ret = isert_set_sig_attrs(se_cmd, &sig_attrs); |
2062 | if (ret) | |
2063 | return ret; | |
9679cc51 | 2064 | |
38a2d0d4 CH |
2065 | WARN_ON_ONCE(offset); |
2066 | ret = rdma_rw_ctx_signature_init(&cmd->rw, conn->qp, port_num, | |
2067 | se_cmd->t_data_sg, se_cmd->t_data_nents, | |
2068 | se_cmd->t_prot_sg, se_cmd->t_prot_nents, | |
2069 | &sig_attrs, addr, rkey, dir); | |
59464ef4 | 2070 | } else { |
38a2d0d4 CH |
2071 | ret = rdma_rw_ctx_init(&cmd->rw, conn->qp, port_num, |
2072 | se_cmd->t_data_sg, se_cmd->t_data_nents, | |
2073 | offset, addr, rkey, dir); | |
59464ef4 | 2074 | } |
66f53e6f | 2075 | |
38a2d0d4 CH |
2076 | if (ret < 0) { |
2077 | isert_err("Cmd: %p failed to prepare RDMA res\n", cmd); | |
2078 | return ret; | |
59464ef4 VP |
2079 | } |
2080 | ||
66f53e6f BP |
2081 | cmd->ctx_init_done = true; |
2082 | ||
2083 | rdma_ctx_post: | |
38a2d0d4 CH |
2084 | ret = rdma_rw_ctx_post(&cmd->rw, conn->qp, port_num, cqe, chain_wr); |
2085 | if (ret < 0) | |
2086 | isert_err("Cmd: %p failed to post RDMA res\n", cmd); | |
59464ef4 VP |
2087 | return ret; |
2088 | } | |
2089 | ||
90ecc6e2 VP |
2090 | static int |
2091 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2092 | { | |
2093 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2094 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
6700425e | 2095 | struct isert_conn *isert_conn = conn->context; |
38a2d0d4 CH |
2096 | struct ib_cqe *cqe = NULL; |
2097 | struct ib_send_wr *chain_wr = NULL; | |
90ecc6e2 VP |
2098 | int rc; |
2099 | ||
24f412dd | 2100 | isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", |
90ecc6e2 | 2101 | isert_cmd, se_cmd->data_length); |
4c22e07f | 2102 | |
38a2d0d4 CH |
2103 | if (isert_prot_cmd(isert_conn, se_cmd)) { |
2104 | isert_cmd->tx_desc.tx_cqe.done = isert_rdma_write_done; | |
2105 | cqe = &isert_cmd->tx_desc.tx_cqe; | |
2106 | } else { | |
9e961ae7 SG |
2107 | /* |
2108 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2109 | */ | |
2110 | isert_create_send_desc(isert_conn, isert_cmd, | |
2111 | &isert_cmd->tx_desc); | |
2112 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) | |
2113 | &isert_cmd->tx_desc.iscsi_header); | |
2114 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2115 | isert_init_send_wr(isert_conn, isert_cmd, | |
68a86dee | 2116 | &isert_cmd->tx_desc.send_wr); |
4366b19c JD |
2117 | |
2118 | rc = isert_post_recv(isert_conn, isert_cmd->rx_desc); | |
c97119b6 | 2119 | if (rc) |
4366b19c | 2120 | return rc; |
b8d26b3b | 2121 | |
38a2d0d4 CH |
2122 | chain_wr = &isert_cmd->tx_desc.send_wr; |
2123 | } | |
b8d26b3b | 2124 | |
555a65f6 NB |
2125 | rc = isert_rdma_rw_ctx_post(isert_cmd, isert_conn, cqe, chain_wr); |
2126 | isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ rc: %d\n", | |
2127 | isert_cmd, rc); | |
2128 | return rc; | |
b8d26b3b NB |
2129 | } |
2130 | ||
2131 | static int | |
2132 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2133 | { | |
d703ce2f | 2134 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
555a65f6 | 2135 | int ret; |
b8d26b3b | 2136 | |
24f412dd | 2137 | isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
38a2d0d4 | 2138 | isert_cmd, cmd->se_cmd.data_length, cmd->write_data_done); |
b8d26b3b | 2139 | |
38a2d0d4 | 2140 | isert_cmd->tx_desc.tx_cqe.done = isert_rdma_read_done; |
555a65f6 NB |
2141 | ret = isert_rdma_rw_ctx_post(isert_cmd, conn->context, |
2142 | &isert_cmd->tx_desc.tx_cqe, NULL); | |
bdf20e72 | 2143 | |
555a65f6 NB |
2144 | isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE rc: %d\n", |
2145 | isert_cmd, ret); | |
2146 | return ret; | |
b8d26b3b NB |
2147 | } |
2148 | ||
2149 | static int | |
2150 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2151 | { | |
a4c15cd9 JD |
2152 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
2153 | int ret = 0; | |
b8d26b3b NB |
2154 | |
2155 | switch (state) { | |
a4c15cd9 JD |
2156 | case ISTATE_REMOVE: |
2157 | spin_lock_bh(&conn->cmd_lock); | |
2158 | list_del_init(&cmd->i_conn_node); | |
2159 | spin_unlock_bh(&conn->cmd_lock); | |
2160 | isert_put_cmd(isert_cmd, true); | |
2161 | break; | |
b8d26b3b NB |
2162 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: |
2163 | ret = isert_put_nopin(cmd, conn, false); | |
2164 | break; | |
2165 | default: | |
24f412dd | 2166 | isert_err("Unknown immediate state: 0x%02x\n", state); |
b8d26b3b NB |
2167 | ret = -EINVAL; |
2168 | break; | |
2169 | } | |
2170 | ||
2171 | return ret; | |
2172 | } | |
2173 | ||
2174 | static int | |
2175 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2176 | { | |
991bb764 | 2177 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2178 | int ret; |
2179 | ||
2180 | switch (state) { | |
2181 | case ISTATE_SEND_LOGOUTRSP: | |
2182 | ret = isert_put_logout_rsp(cmd, conn); | |
991bb764 SG |
2183 | if (!ret) |
2184 | isert_conn->logout_posted = true; | |
b8d26b3b NB |
2185 | break; |
2186 | case ISTATE_SEND_NOPIN: | |
2187 | ret = isert_put_nopin(cmd, conn, true); | |
2188 | break; | |
2189 | case ISTATE_SEND_TASKMGTRSP: | |
2190 | ret = isert_put_tm_rsp(cmd, conn); | |
2191 | break; | |
2192 | case ISTATE_SEND_REJECT: | |
2193 | ret = isert_put_reject(cmd, conn); | |
2194 | break; | |
adb54c29 NB |
2195 | case ISTATE_SEND_TEXTRSP: |
2196 | ret = isert_put_text_rsp(cmd, conn); | |
2197 | break; | |
b8d26b3b NB |
2198 | case ISTATE_SEND_STATUS: |
2199 | /* | |
2200 | * Special case for sending non GOOD SCSI status from TX thread | |
2201 | * context during pre se_cmd excecution failure. | |
2202 | */ | |
2203 | ret = isert_put_response(conn, cmd); | |
2204 | break; | |
2205 | default: | |
24f412dd | 2206 | isert_err("Unknown response state: 0x%02x\n", state); |
b8d26b3b NB |
2207 | ret = -EINVAL; |
2208 | break; | |
2209 | } | |
2210 | ||
2211 | return ret; | |
2212 | } | |
2213 | ||
ca6c1d82 SG |
2214 | struct rdma_cm_id * |
2215 | isert_setup_id(struct isert_np *isert_np) | |
2216 | { | |
2217 | struct iscsi_np *np = isert_np->np; | |
2218 | struct rdma_cm_id *id; | |
2219 | struct sockaddr *sa; | |
2220 | int ret; | |
2221 | ||
2222 | sa = (struct sockaddr *)&np->np_sockaddr; | |
24f412dd | 2223 | isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); |
ca6c1d82 | 2224 | |
fa20105e | 2225 | id = rdma_create_id(&init_net, isert_cma_handler, isert_np, |
ca6c1d82 SG |
2226 | RDMA_PS_TCP, IB_QPT_RC); |
2227 | if (IS_ERR(id)) { | |
24f412dd | 2228 | isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); |
ca6c1d82 SG |
2229 | ret = PTR_ERR(id); |
2230 | goto out; | |
2231 | } | |
24f412dd | 2232 | isert_dbg("id %p context %p\n", id, id->context); |
ca6c1d82 | 2233 | |
221442ea MG |
2234 | /* |
2235 | * Allow both IPv4 and IPv6 sockets to bind a single port | |
2236 | * at the same time. | |
2237 | */ | |
2238 | ret = rdma_set_afonly(id, 1); | |
2239 | if (ret) { | |
2240 | isert_err("rdma_set_afonly() failed: %d\n", ret); | |
2241 | goto out_id; | |
2242 | } | |
2243 | ||
ca6c1d82 SG |
2244 | ret = rdma_bind_addr(id, sa); |
2245 | if (ret) { | |
24f412dd | 2246 | isert_err("rdma_bind_addr() failed: %d\n", ret); |
ca6c1d82 SG |
2247 | goto out_id; |
2248 | } | |
2249 | ||
992607e8 | 2250 | ret = rdma_listen(id, 0); |
ca6c1d82 | 2251 | if (ret) { |
24f412dd | 2252 | isert_err("rdma_listen() failed: %d\n", ret); |
ca6c1d82 SG |
2253 | goto out_id; |
2254 | } | |
2255 | ||
2256 | return id; | |
2257 | out_id: | |
2258 | rdma_destroy_id(id); | |
2259 | out: | |
2260 | return ERR_PTR(ret); | |
2261 | } | |
2262 | ||
b8d26b3b NB |
2263 | static int |
2264 | isert_setup_np(struct iscsi_np *np, | |
13a3cf08 | 2265 | struct sockaddr_storage *ksockaddr) |
b8d26b3b NB |
2266 | { |
2267 | struct isert_np *isert_np; | |
2268 | struct rdma_cm_id *isert_lid; | |
b8d26b3b NB |
2269 | int ret; |
2270 | ||
2271 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
93b80f29 | 2272 | if (!isert_np) |
b8d26b3b | 2273 | return -ENOMEM; |
93b80f29 | 2274 | |
ed8cb0a4 JD |
2275 | sema_init(&isert_np->sem, 0); |
2276 | mutex_init(&isert_np->mutex); | |
bd379220 JD |
2277 | INIT_LIST_HEAD(&isert_np->accepted); |
2278 | INIT_LIST_HEAD(&isert_np->pending); | |
ca6c1d82 | 2279 | isert_np->np = np; |
b8d26b3b | 2280 | |
b8d26b3b NB |
2281 | /* |
2282 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
2283 | * in iscsi_target_configfs.c code.. | |
2284 | */ | |
2285 | memcpy(&np->np_sockaddr, ksockaddr, | |
13a3cf08 | 2286 | sizeof(struct sockaddr_storage)); |
b8d26b3b | 2287 | |
ca6c1d82 | 2288 | isert_lid = isert_setup_id(isert_np); |
b8d26b3b | 2289 | if (IS_ERR(isert_lid)) { |
b8d26b3b NB |
2290 | ret = PTR_ERR(isert_lid); |
2291 | goto out; | |
2292 | } | |
2293 | ||
ed8cb0a4 | 2294 | isert_np->cm_id = isert_lid; |
b8d26b3b | 2295 | np->np_context = isert_np; |
b8d26b3b NB |
2296 | |
2297 | return 0; | |
2298 | ||
b8d26b3b NB |
2299 | out: |
2300 | kfree(isert_np); | |
ca6c1d82 | 2301 | |
b8d26b3b NB |
2302 | return ret; |
2303 | } | |
2304 | ||
b8d26b3b NB |
2305 | static int |
2306 | isert_rdma_accept(struct isert_conn *isert_conn) | |
2307 | { | |
dac6ab30 | 2308 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b NB |
2309 | struct rdma_conn_param cp; |
2310 | int ret; | |
13bce482 | 2311 | struct iser_cm_hdr rsp_hdr; |
b8d26b3b NB |
2312 | |
2313 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
b8d26b3b NB |
2314 | cp.initiator_depth = isert_conn->initiator_depth; |
2315 | cp.retry_count = 7; | |
2316 | cp.rnr_retry_count = 7; | |
2317 | ||
13bce482 | 2318 | memset(&rsp_hdr, 0, sizeof(rsp_hdr)); |
422bd0ac JD |
2319 | rsp_hdr.flags = ISERT_ZBVA_NOT_USED; |
2320 | if (!isert_conn->snd_w_inv) | |
2321 | rsp_hdr.flags = rsp_hdr.flags | ISERT_SEND_W_INV_NOT_USED; | |
13bce482 JD |
2322 | cp.private_data = (void *)&rsp_hdr; |
2323 | cp.private_data_len = sizeof(rsp_hdr); | |
2324 | ||
b8d26b3b NB |
2325 | ret = rdma_accept(cm_id, &cp); |
2326 | if (ret) { | |
24f412dd | 2327 | isert_err("rdma_accept() failed with: %d\n", ret); |
b8d26b3b NB |
2328 | return ret; |
2329 | } | |
2330 | ||
b8d26b3b NB |
2331 | return 0; |
2332 | } | |
2333 | ||
2334 | static int | |
2335 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
2336 | { | |
6700425e | 2337 | struct isert_conn *isert_conn = conn->context; |
b8d26b3b NB |
2338 | int ret; |
2339 | ||
24f412dd | 2340 | isert_info("before login_req comp conn: %p\n", isert_conn); |
2371e5da SG |
2341 | ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); |
2342 | if (ret) { | |
24f412dd | 2343 | isert_err("isert_conn %p interrupted before got login req\n", |
2371e5da SG |
2344 | isert_conn); |
2345 | return ret; | |
2346 | } | |
2347 | reinit_completion(&isert_conn->login_req_comp); | |
2348 | ||
6faaa85f NB |
2349 | /* |
2350 | * For login requests after the first PDU, isert_rx_login_req() will | |
2351 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
2352 | * received, which turns this callback from iscsi_target_do_login_rx() | |
2353 | * into a NOP. | |
2354 | */ | |
2355 | if (!login->first_request) | |
2356 | return 0; | |
b8d26b3b | 2357 | |
2371e5da SG |
2358 | isert_rx_login_req(isert_conn); |
2359 | ||
dac6ab30 SG |
2360 | isert_info("before login_comp conn: %p\n", conn); |
2361 | ret = wait_for_completion_interruptible(&isert_conn->login_comp); | |
b8d26b3b NB |
2362 | if (ret) |
2363 | return ret; | |
2364 | ||
24f412dd | 2365 | isert_info("processing login->req: %p\n", login->req); |
2371e5da | 2366 | |
b8d26b3b NB |
2367 | return 0; |
2368 | } | |
2369 | ||
2370 | static void | |
2371 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
2372 | struct isert_conn *isert_conn) | |
2373 | { | |
dac6ab30 | 2374 | struct rdma_cm_id *cm_id = isert_conn->cm_id; |
b8d26b3b | 2375 | struct rdma_route *cm_route = &cm_id->route; |
b8d26b3b NB |
2376 | |
2377 | conn->login_family = np->np_sockaddr.ss_family; | |
2378 | ||
dc58f760 AG |
2379 | conn->login_sockaddr = cm_route->addr.dst_addr; |
2380 | conn->local_sockaddr = cm_route->addr.src_addr; | |
b8d26b3b NB |
2381 | } |
2382 | ||
2383 | static int | |
2384 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
2385 | { | |
6700425e | 2386 | struct isert_np *isert_np = np->np_context; |
b8d26b3b | 2387 | struct isert_conn *isert_conn; |
c6b8e918 | 2388 | int ret; |
b8d26b3b NB |
2389 | |
2390 | accept_wait: | |
ed8cb0a4 | 2391 | ret = down_interruptible(&isert_np->sem); |
c6b8e918 | 2392 | if (ret) |
b8d26b3b NB |
2393 | return -ENODEV; |
2394 | ||
2395 | spin_lock_bh(&np->np_thread_lock); | |
e346ab34 | 2396 | if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { |
b8d26b3b | 2397 | spin_unlock_bh(&np->np_thread_lock); |
11378cdb | 2398 | isert_dbg("np_thread_state %d\n", |
e346ab34 SG |
2399 | np->np_thread_state); |
2400 | /** | |
2401 | * No point in stalling here when np_thread | |
2402 | * is in state RESET/SHUTDOWN/EXIT - bail | |
2403 | **/ | |
b8d26b3b NB |
2404 | return -ENODEV; |
2405 | } | |
2406 | spin_unlock_bh(&np->np_thread_lock); | |
2407 | ||
ed8cb0a4 | 2408 | mutex_lock(&isert_np->mutex); |
bd379220 | 2409 | if (list_empty(&isert_np->pending)) { |
ed8cb0a4 | 2410 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
2411 | goto accept_wait; |
2412 | } | |
bd379220 JD |
2413 | isert_conn = list_first_entry(&isert_np->pending, |
2414 | struct isert_conn, node); | |
2415 | list_del_init(&isert_conn->node); | |
ed8cb0a4 | 2416 | mutex_unlock(&isert_np->mutex); |
b8d26b3b NB |
2417 | |
2418 | conn->context = isert_conn; | |
2419 | isert_conn->conn = conn; | |
aea92980 | 2420 | isert_conn->state = ISER_CONN_BOUND; |
b8d26b3b | 2421 | |
b8d26b3b NB |
2422 | isert_set_conn_info(np, conn, isert_conn); |
2423 | ||
24f412dd | 2424 | isert_dbg("Processing isert_conn: %p\n", isert_conn); |
2371e5da | 2425 | |
b8d26b3b NB |
2426 | return 0; |
2427 | } | |
2428 | ||
2429 | static void | |
2430 | isert_free_np(struct iscsi_np *np) | |
2431 | { | |
6700425e | 2432 | struct isert_np *isert_np = np->np_context; |
268e6811 | 2433 | struct isert_conn *isert_conn, *n; |
b8d26b3b | 2434 | |
ed8cb0a4 JD |
2435 | if (isert_np->cm_id) |
2436 | rdma_destroy_id(isert_np->cm_id); | |
b8d26b3b | 2437 | |
268e6811 SG |
2438 | /* |
2439 | * FIXME: At this point we don't have a good way to insure | |
2440 | * that at this point we don't have hanging connections that | |
2441 | * completed RDMA establishment but didn't start iscsi login | |
2442 | * process. So work-around this by cleaning up what ever piled | |
bd379220 | 2443 | * up in accepted and pending lists. |
268e6811 | 2444 | */ |
ed8cb0a4 | 2445 | mutex_lock(&isert_np->mutex); |
bd379220 JD |
2446 | if (!list_empty(&isert_np->pending)) { |
2447 | isert_info("Still have isert pending connections\n"); | |
2448 | list_for_each_entry_safe(isert_conn, n, | |
2449 | &isert_np->pending, | |
2450 | node) { | |
2451 | isert_info("cleaning isert_conn %p state (%d)\n", | |
2452 | isert_conn, isert_conn->state); | |
2453 | isert_connect_release(isert_conn); | |
2454 | } | |
2455 | } | |
2456 | ||
2457 | if (!list_empty(&isert_np->accepted)) { | |
2458 | isert_info("Still have isert accepted connections\n"); | |
268e6811 | 2459 | list_for_each_entry_safe(isert_conn, n, |
bd379220 JD |
2460 | &isert_np->accepted, |
2461 | node) { | |
24f412dd | 2462 | isert_info("cleaning isert_conn %p state (%d)\n", |
268e6811 SG |
2463 | isert_conn, isert_conn->state); |
2464 | isert_connect_release(isert_conn); | |
2465 | } | |
2466 | } | |
ed8cb0a4 | 2467 | mutex_unlock(&isert_np->mutex); |
268e6811 | 2468 | |
b8d26b3b NB |
2469 | np->np_context = NULL; |
2470 | kfree(isert_np); | |
2471 | } | |
2472 | ||
b02efbfc SG |
2473 | static void isert_release_work(struct work_struct *work) |
2474 | { | |
2475 | struct isert_conn *isert_conn = container_of(work, | |
2476 | struct isert_conn, | |
2477 | release_work); | |
2478 | ||
24f412dd | 2479 | isert_info("Starting release conn %p\n", isert_conn); |
b02efbfc | 2480 | |
dac6ab30 | 2481 | mutex_lock(&isert_conn->mutex); |
b02efbfc | 2482 | isert_conn->state = ISER_CONN_DOWN; |
dac6ab30 | 2483 | mutex_unlock(&isert_conn->mutex); |
b02efbfc | 2484 | |
24f412dd | 2485 | isert_info("Destroying conn %p\n", isert_conn); |
b02efbfc SG |
2486 | isert_put_conn(isert_conn); |
2487 | } | |
2488 | ||
991bb764 SG |
2489 | static void |
2490 | isert_wait4logout(struct isert_conn *isert_conn) | |
2491 | { | |
2492 | struct iscsi_conn *conn = isert_conn->conn; | |
2493 | ||
4c22e07f SG |
2494 | isert_info("conn %p\n", isert_conn); |
2495 | ||
991bb764 | 2496 | if (isert_conn->logout_posted) { |
24f412dd | 2497 | isert_info("conn %p wait for conn_logout_comp\n", isert_conn); |
991bb764 SG |
2498 | wait_for_completion_timeout(&conn->conn_logout_comp, |
2499 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
2500 | } | |
2501 | } | |
2502 | ||
76261ada BVA |
2503 | static void |
2504 | isert_wait4cmds(struct iscsi_conn *conn) | |
2505 | { | |
2506 | isert_info("iscsi_conn %p\n", conn); | |
2507 | ||
2508 | if (conn->sess) { | |
6f55b06f | 2509 | target_stop_session(conn->sess->se_sess); |
76261ada BVA |
2510 | target_wait_for_sess_cmds(conn->sess->se_sess); |
2511 | } | |
2512 | } | |
2513 | ||
3e03c4b0 JD |
2514 | /** |
2515 | * isert_put_unsol_pending_cmds() - Drop commands waiting for | |
2516 | * unsolicitate dataout | |
2517 | * @conn: iscsi connection | |
2518 | * | |
2519 | * We might still have commands that are waiting for unsolicited | |
2520 | * dataouts messages. We must put the extra reference on those | |
2521 | * before blocking on the target_wait_for_session_cmds | |
2522 | */ | |
2523 | static void | |
2524 | isert_put_unsol_pending_cmds(struct iscsi_conn *conn) | |
2525 | { | |
2526 | struct iscsi_cmd *cmd, *tmp; | |
2527 | static LIST_HEAD(drop_cmd_list); | |
2528 | ||
2529 | spin_lock_bh(&conn->cmd_lock); | |
2530 | list_for_each_entry_safe(cmd, tmp, &conn->conn_cmd_list, i_conn_node) { | |
2531 | if ((cmd->cmd_flags & ICF_NON_IMMEDIATE_UNSOLICITED_DATA) && | |
2532 | (cmd->write_data_done < conn->sess->sess_ops->FirstBurstLength) && | |
2533 | (cmd->write_data_done < cmd->se_cmd.data_length)) | |
2534 | list_move_tail(&cmd->i_conn_node, &drop_cmd_list); | |
2535 | } | |
2536 | spin_unlock_bh(&conn->cmd_lock); | |
2537 | ||
2538 | list_for_each_entry_safe(cmd, tmp, &drop_cmd_list, i_conn_node) { | |
2539 | list_del_init(&cmd->i_conn_node); | |
2540 | if (cmd->i_state != ISTATE_REMOVE) { | |
2541 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
2542 | ||
2543 | isert_info("conn %p dropping cmd %p\n", conn, cmd); | |
2544 | isert_put_cmd(isert_cmd, true); | |
2545 | } | |
2546 | } | |
2547 | } | |
2548 | ||
defd8848 | 2549 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
2550 | { |
2551 | struct isert_conn *isert_conn = conn->context; | |
2552 | ||
4c22e07f | 2553 | isert_info("Starting conn %p\n", isert_conn); |
b8d26b3b | 2554 | |
dac6ab30 | 2555 | mutex_lock(&isert_conn->mutex); |
954f2372 | 2556 | isert_conn_terminate(isert_conn); |
dac6ab30 | 2557 | mutex_unlock(&isert_conn->mutex); |
b8d26b3b | 2558 | |
572a1434 | 2559 | ib_drain_qp(isert_conn->qp); |
3e03c4b0 | 2560 | isert_put_unsol_pending_cmds(conn); |
76261ada | 2561 | isert_wait4cmds(conn); |
991bb764 | 2562 | isert_wait4logout(isert_conn); |
954f2372 | 2563 | |
b02efbfc | 2564 | queue_work(isert_release_wq, &isert_conn->release_work); |
defd8848 NB |
2565 | } |
2566 | ||
2567 | static void isert_free_conn(struct iscsi_conn *conn) | |
2568 | { | |
2569 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b | 2570 | |
572a1434 | 2571 | ib_drain_qp(isert_conn->qp); |
b8d26b3b NB |
2572 | isert_put_conn(isert_conn); |
2573 | } | |
2574 | ||
187e84f7 VP |
2575 | static void isert_get_rx_pdu(struct iscsi_conn *conn) |
2576 | { | |
2577 | struct completion comp; | |
2578 | ||
2579 | init_completion(&comp); | |
2580 | ||
2581 | wait_for_completion_interruptible(&comp); | |
2582 | } | |
2583 | ||
b8d26b3b NB |
2584 | static struct iscsit_transport iser_target_transport = { |
2585 | .name = "IB/iSER", | |
2586 | .transport_type = ISCSI_INFINIBAND, | |
bd027d85 | 2587 | .rdma_shutdown = true, |
d703ce2f | 2588 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
2589 | .owner = THIS_MODULE, |
2590 | .iscsit_setup_np = isert_setup_np, | |
2591 | .iscsit_accept_np = isert_accept_np, | |
2592 | .iscsit_free_np = isert_free_np, | |
defd8848 | 2593 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 2594 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
2595 | .iscsit_get_login_rx = isert_get_login_rx, |
2596 | .iscsit_put_login_tx = isert_put_login_tx, | |
2597 | .iscsit_immediate_queue = isert_immediate_queue, | |
2598 | .iscsit_response_queue = isert_response_queue, | |
2599 | .iscsit_get_dataout = isert_get_dataout, | |
2600 | .iscsit_queue_data_in = isert_put_datain, | |
2601 | .iscsit_queue_status = isert_put_response, | |
131e6abc | 2602 | .iscsit_aborted_task = isert_aborted_task, |
187e84f7 | 2603 | .iscsit_get_rx_pdu = isert_get_rx_pdu, |
e70beee7 | 2604 | .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, |
b8d26b3b NB |
2605 | }; |
2606 | ||
2607 | static int __init isert_init(void) | |
2608 | { | |
2609 | int ret; | |
2610 | ||
631af550 SG |
2611 | isert_comp_wq = alloc_workqueue("isert_comp_wq", |
2612 | WQ_UNBOUND | WQ_HIGHPRI, 0); | |
b8d26b3b | 2613 | if (!isert_comp_wq) { |
24f412dd | 2614 | isert_err("Unable to allocate isert_comp_wq\n"); |
6f0fae3d | 2615 | return -ENOMEM; |
b8d26b3b NB |
2616 | } |
2617 | ||
b02efbfc SG |
2618 | isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, |
2619 | WQ_UNBOUND_MAX_ACTIVE); | |
2620 | if (!isert_release_wq) { | |
24f412dd | 2621 | isert_err("Unable to allocate isert_release_wq\n"); |
b02efbfc SG |
2622 | ret = -ENOMEM; |
2623 | goto destroy_comp_wq; | |
2624 | } | |
2625 | ||
b8d26b3b | 2626 | iscsit_register_transport(&iser_target_transport); |
24f412dd | 2627 | isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); |
b02efbfc | 2628 | |
b8d26b3b NB |
2629 | return 0; |
2630 | ||
b02efbfc SG |
2631 | destroy_comp_wq: |
2632 | destroy_workqueue(isert_comp_wq); | |
6f0fae3d | 2633 | |
b8d26b3b NB |
2634 | return ret; |
2635 | } | |
2636 | ||
2637 | static void __exit isert_exit(void) | |
2638 | { | |
f5ebec96 | 2639 | flush_scheduled_work(); |
b02efbfc | 2640 | destroy_workqueue(isert_release_wq); |
b8d26b3b | 2641 | destroy_workqueue(isert_comp_wq); |
b8d26b3b | 2642 | iscsit_unregister_transport(&iser_target_transport); |
4c22e07f | 2643 | isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); |
b8d26b3b NB |
2644 | } |
2645 | ||
2646 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
b8d26b3b NB |
2647 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); |
2648 | MODULE_LICENSE("GPL"); | |
2649 | ||
2650 | module_init(isert_init); | |
2651 | module_exit(isert_exit); |