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Commit | Line | Data |
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b8d26b3b NB |
1 | /******************************************************************************* |
2 | * This file contains iSCSI extentions for RDMA (iSER) Verbs | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2013 Datera, Inc. |
b8d26b3b NB |
5 | * |
6 | * Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ****************************************************************************/ | |
18 | ||
19 | #include <linux/string.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/scatterlist.h> | |
22 | #include <linux/socket.h> | |
23 | #include <linux/in.h> | |
24 | #include <linux/in6.h> | |
95b60f07 | 25 | #include <linux/llist.h> |
b8d26b3b NB |
26 | #include <rdma/ib_verbs.h> |
27 | #include <rdma/rdma_cm.h> | |
28 | #include <target/target_core_base.h> | |
29 | #include <target/target_core_fabric.h> | |
30 | #include <target/iscsi/iscsi_transport.h> | |
31 | ||
32 | #include "isert_proto.h" | |
33 | #include "ib_isert.h" | |
34 | ||
35 | #define ISERT_MAX_CONN 8 | |
36 | #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN) | |
37 | #define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * ISERT_MAX_CONN) | |
38 | ||
39 | static DEFINE_MUTEX(device_list_mutex); | |
40 | static LIST_HEAD(device_list); | |
41 | static struct workqueue_struct *isert_rx_wq; | |
42 | static struct workqueue_struct *isert_comp_wq; | |
b8d26b3b | 43 | |
d40945d8 VP |
44 | static void |
45 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); | |
46 | static int | |
47 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
48 | struct isert_rdma_wr *wr); | |
59464ef4 | 49 | static void |
a3a5a826 | 50 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); |
59464ef4 | 51 | static int |
a3a5a826 SG |
52 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
53 | struct isert_rdma_wr *wr); | |
d40945d8 | 54 | |
b8d26b3b NB |
55 | static void |
56 | isert_qp_event_callback(struct ib_event *e, void *context) | |
57 | { | |
58 | struct isert_conn *isert_conn = (struct isert_conn *)context; | |
59 | ||
60 | pr_err("isert_qp_event_callback event: %d\n", e->event); | |
61 | switch (e->event) { | |
62 | case IB_EVENT_COMM_EST: | |
63 | rdma_notify(isert_conn->conn_cm_id, IB_EVENT_COMM_EST); | |
64 | break; | |
65 | case IB_EVENT_QP_LAST_WQE_REACHED: | |
66 | pr_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED:\n"); | |
67 | break; | |
68 | default: | |
69 | break; | |
70 | } | |
71 | } | |
72 | ||
73 | static int | |
74 | isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) | |
75 | { | |
76 | int ret; | |
77 | ||
78 | ret = ib_query_device(ib_dev, devattr); | |
79 | if (ret) { | |
80 | pr_err("ib_query_device() failed: %d\n", ret); | |
81 | return ret; | |
82 | } | |
83 | pr_debug("devattr->max_sge: %d\n", devattr->max_sge); | |
84 | pr_debug("devattr->max_sge_rd: %d\n", devattr->max_sge_rd); | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | static int | |
90 | isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) | |
91 | { | |
92 | struct isert_device *device = isert_conn->conn_device; | |
93 | struct ib_qp_init_attr attr; | |
b8d26b3b NB |
94 | int ret, index, min_index = 0; |
95 | ||
b8d26b3b NB |
96 | mutex_lock(&device_list_mutex); |
97 | for (index = 0; index < device->cqs_used; index++) | |
98 | if (device->cq_active_qps[index] < | |
99 | device->cq_active_qps[min_index]) | |
100 | min_index = index; | |
101 | device->cq_active_qps[min_index]++; | |
102 | pr_debug("isert_conn_setup_qp: Using min_index: %d\n", min_index); | |
103 | mutex_unlock(&device_list_mutex); | |
104 | ||
105 | memset(&attr, 0, sizeof(struct ib_qp_init_attr)); | |
106 | attr.event_handler = isert_qp_event_callback; | |
107 | attr.qp_context = isert_conn; | |
108 | attr.send_cq = device->dev_tx_cq[min_index]; | |
109 | attr.recv_cq = device->dev_rx_cq[min_index]; | |
110 | attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; | |
111 | attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS; | |
112 | /* | |
113 | * FIXME: Use devattr.max_sge - 2 for max_send_sge as | |
114 | * work-around for RDMA_READ.. | |
115 | */ | |
59464ef4 | 116 | attr.cap.max_send_sge = device->dev_attr.max_sge - 2; |
b8d26b3b NB |
117 | isert_conn->max_sge = attr.cap.max_send_sge; |
118 | ||
119 | attr.cap.max_recv_sge = 1; | |
120 | attr.sq_sig_type = IB_SIGNAL_REQ_WR; | |
121 | attr.qp_type = IB_QPT_RC; | |
122 | ||
123 | pr_debug("isert_conn_setup_qp cma_id->device: %p\n", | |
124 | cma_id->device); | |
125 | pr_debug("isert_conn_setup_qp conn_pd->device: %p\n", | |
126 | isert_conn->conn_pd->device); | |
127 | ||
128 | ret = rdma_create_qp(cma_id, isert_conn->conn_pd, &attr); | |
129 | if (ret) { | |
130 | pr_err("rdma_create_qp failed for cma_id %d\n", ret); | |
131 | return ret; | |
132 | } | |
133 | isert_conn->conn_qp = cma_id->qp; | |
134 | pr_debug("rdma_create_qp() returned success >>>>>>>>>>>>>>>>>>>>>>>>>.\n"); | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | static void | |
140 | isert_cq_event_callback(struct ib_event *e, void *context) | |
141 | { | |
142 | pr_debug("isert_cq_event_callback event: %d\n", e->event); | |
143 | } | |
144 | ||
145 | static int | |
146 | isert_alloc_rx_descriptors(struct isert_conn *isert_conn) | |
147 | { | |
148 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
149 | struct iser_rx_desc *rx_desc; | |
150 | struct ib_sge *rx_sg; | |
151 | u64 dma_addr; | |
152 | int i, j; | |
153 | ||
154 | isert_conn->conn_rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * | |
155 | sizeof(struct iser_rx_desc), GFP_KERNEL); | |
156 | if (!isert_conn->conn_rx_descs) | |
157 | goto fail; | |
158 | ||
159 | rx_desc = isert_conn->conn_rx_descs; | |
160 | ||
161 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
162 | dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, | |
163 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
164 | if (ib_dma_mapping_error(ib_dev, dma_addr)) | |
165 | goto dma_map_fail; | |
166 | ||
167 | rx_desc->dma_addr = dma_addr; | |
168 | ||
169 | rx_sg = &rx_desc->rx_sg; | |
170 | rx_sg->addr = rx_desc->dma_addr; | |
171 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; | |
172 | rx_sg->lkey = isert_conn->conn_mr->lkey; | |
173 | } | |
174 | ||
175 | isert_conn->conn_rx_desc_head = 0; | |
176 | return 0; | |
177 | ||
178 | dma_map_fail: | |
179 | rx_desc = isert_conn->conn_rx_descs; | |
180 | for (j = 0; j < i; j++, rx_desc++) { | |
181 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
182 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
183 | } | |
184 | kfree(isert_conn->conn_rx_descs); | |
185 | isert_conn->conn_rx_descs = NULL; | |
186 | fail: | |
187 | return -ENOMEM; | |
188 | } | |
189 | ||
190 | static void | |
191 | isert_free_rx_descriptors(struct isert_conn *isert_conn) | |
192 | { | |
193 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
194 | struct iser_rx_desc *rx_desc; | |
195 | int i; | |
196 | ||
197 | if (!isert_conn->conn_rx_descs) | |
198 | return; | |
199 | ||
200 | rx_desc = isert_conn->conn_rx_descs; | |
201 | for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { | |
202 | ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, | |
203 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); | |
204 | } | |
205 | ||
206 | kfree(isert_conn->conn_rx_descs); | |
207 | isert_conn->conn_rx_descs = NULL; | |
208 | } | |
209 | ||
2853c2b6 | 210 | static void isert_cq_tx_work(struct work_struct *); |
b8d26b3b | 211 | static void isert_cq_tx_callback(struct ib_cq *, void *); |
2853c2b6 | 212 | static void isert_cq_rx_work(struct work_struct *); |
b8d26b3b NB |
213 | static void isert_cq_rx_callback(struct ib_cq *, void *); |
214 | ||
215 | static int | |
216 | isert_create_device_ib_res(struct isert_device *device) | |
217 | { | |
218 | struct ib_device *ib_dev = device->ib_device; | |
219 | struct isert_cq_desc *cq_desc; | |
59464ef4 | 220 | struct ib_device_attr *dev_attr; |
b8d26b3b NB |
221 | int ret = 0, i, j; |
222 | ||
59464ef4 VP |
223 | dev_attr = &device->dev_attr; |
224 | ret = isert_query_device(ib_dev, dev_attr); | |
225 | if (ret) | |
226 | return ret; | |
227 | ||
d40945d8 | 228 | /* asign function handlers */ |
59464ef4 | 229 | if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) { |
a3a5a826 SG |
230 | device->use_fastreg = 1; |
231 | device->reg_rdma_mem = isert_reg_rdma; | |
232 | device->unreg_rdma_mem = isert_unreg_rdma; | |
59464ef4 | 233 | } else { |
a3a5a826 | 234 | device->use_fastreg = 0; |
59464ef4 VP |
235 | device->reg_rdma_mem = isert_map_rdma; |
236 | device->unreg_rdma_mem = isert_unmap_cmd; | |
237 | } | |
d40945d8 | 238 | |
b8d26b3b NB |
239 | device->cqs_used = min_t(int, num_online_cpus(), |
240 | device->ib_device->num_comp_vectors); | |
241 | device->cqs_used = min(ISERT_MAX_CQ, device->cqs_used); | |
a3a5a826 SG |
242 | pr_debug("Using %d CQs, device %s supports %d vectors support " |
243 | "Fast registration %d\n", | |
b8d26b3b | 244 | device->cqs_used, device->ib_device->name, |
a3a5a826 | 245 | device->ib_device->num_comp_vectors, device->use_fastreg); |
b8d26b3b NB |
246 | device->cq_desc = kzalloc(sizeof(struct isert_cq_desc) * |
247 | device->cqs_used, GFP_KERNEL); | |
248 | if (!device->cq_desc) { | |
249 | pr_err("Unable to allocate device->cq_desc\n"); | |
250 | return -ENOMEM; | |
251 | } | |
252 | cq_desc = device->cq_desc; | |
253 | ||
b8d26b3b NB |
254 | for (i = 0; i < device->cqs_used; i++) { |
255 | cq_desc[i].device = device; | |
256 | cq_desc[i].cq_index = i; | |
257 | ||
2853c2b6 | 258 | INIT_WORK(&cq_desc[i].cq_rx_work, isert_cq_rx_work); |
b8d26b3b NB |
259 | device->dev_rx_cq[i] = ib_create_cq(device->ib_device, |
260 | isert_cq_rx_callback, | |
261 | isert_cq_event_callback, | |
262 | (void *)&cq_desc[i], | |
263 | ISER_MAX_RX_CQ_LEN, i); | |
94a71110 WY |
264 | if (IS_ERR(device->dev_rx_cq[i])) { |
265 | ret = PTR_ERR(device->dev_rx_cq[i]); | |
266 | device->dev_rx_cq[i] = NULL; | |
b8d26b3b | 267 | goto out_cq; |
94a71110 | 268 | } |
b8d26b3b | 269 | |
2853c2b6 | 270 | INIT_WORK(&cq_desc[i].cq_tx_work, isert_cq_tx_work); |
b8d26b3b NB |
271 | device->dev_tx_cq[i] = ib_create_cq(device->ib_device, |
272 | isert_cq_tx_callback, | |
273 | isert_cq_event_callback, | |
274 | (void *)&cq_desc[i], | |
275 | ISER_MAX_TX_CQ_LEN, i); | |
94a71110 WY |
276 | if (IS_ERR(device->dev_tx_cq[i])) { |
277 | ret = PTR_ERR(device->dev_tx_cq[i]); | |
278 | device->dev_tx_cq[i] = NULL; | |
b8d26b3b | 279 | goto out_cq; |
94a71110 | 280 | } |
b8d26b3b | 281 | |
94a71110 WY |
282 | ret = ib_req_notify_cq(device->dev_rx_cq[i], IB_CQ_NEXT_COMP); |
283 | if (ret) | |
b8d26b3b NB |
284 | goto out_cq; |
285 | ||
94a71110 WY |
286 | ret = ib_req_notify_cq(device->dev_tx_cq[i], IB_CQ_NEXT_COMP); |
287 | if (ret) | |
b8d26b3b NB |
288 | goto out_cq; |
289 | } | |
290 | ||
b8d26b3b NB |
291 | return 0; |
292 | ||
293 | out_cq: | |
294 | for (j = 0; j < i; j++) { | |
295 | cq_desc = &device->cq_desc[j]; | |
296 | ||
297 | if (device->dev_rx_cq[j]) { | |
298 | cancel_work_sync(&cq_desc->cq_rx_work); | |
299 | ib_destroy_cq(device->dev_rx_cq[j]); | |
300 | } | |
301 | if (device->dev_tx_cq[j]) { | |
302 | cancel_work_sync(&cq_desc->cq_tx_work); | |
303 | ib_destroy_cq(device->dev_tx_cq[j]); | |
304 | } | |
305 | } | |
b8d26b3b NB |
306 | kfree(device->cq_desc); |
307 | ||
308 | return ret; | |
309 | } | |
310 | ||
311 | static void | |
312 | isert_free_device_ib_res(struct isert_device *device) | |
313 | { | |
314 | struct isert_cq_desc *cq_desc; | |
315 | int i; | |
316 | ||
317 | for (i = 0; i < device->cqs_used; i++) { | |
318 | cq_desc = &device->cq_desc[i]; | |
319 | ||
320 | cancel_work_sync(&cq_desc->cq_rx_work); | |
321 | cancel_work_sync(&cq_desc->cq_tx_work); | |
322 | ib_destroy_cq(device->dev_rx_cq[i]); | |
323 | ib_destroy_cq(device->dev_tx_cq[i]); | |
324 | device->dev_rx_cq[i] = NULL; | |
325 | device->dev_tx_cq[i] = NULL; | |
326 | } | |
327 | ||
b8d26b3b NB |
328 | kfree(device->cq_desc); |
329 | } | |
330 | ||
331 | static void | |
332 | isert_device_try_release(struct isert_device *device) | |
333 | { | |
334 | mutex_lock(&device_list_mutex); | |
335 | device->refcount--; | |
336 | if (!device->refcount) { | |
337 | isert_free_device_ib_res(device); | |
338 | list_del(&device->dev_node); | |
339 | kfree(device); | |
340 | } | |
341 | mutex_unlock(&device_list_mutex); | |
342 | } | |
343 | ||
344 | static struct isert_device * | |
345 | isert_device_find_by_ib_dev(struct rdma_cm_id *cma_id) | |
346 | { | |
347 | struct isert_device *device; | |
348 | int ret; | |
349 | ||
350 | mutex_lock(&device_list_mutex); | |
351 | list_for_each_entry(device, &device_list, dev_node) { | |
352 | if (device->ib_device->node_guid == cma_id->device->node_guid) { | |
353 | device->refcount++; | |
354 | mutex_unlock(&device_list_mutex); | |
355 | return device; | |
356 | } | |
357 | } | |
358 | ||
359 | device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); | |
360 | if (!device) { | |
361 | mutex_unlock(&device_list_mutex); | |
362 | return ERR_PTR(-ENOMEM); | |
363 | } | |
364 | ||
365 | INIT_LIST_HEAD(&device->dev_node); | |
366 | ||
367 | device->ib_device = cma_id->device; | |
368 | ret = isert_create_device_ib_res(device); | |
369 | if (ret) { | |
370 | kfree(device); | |
371 | mutex_unlock(&device_list_mutex); | |
372 | return ERR_PTR(ret); | |
373 | } | |
374 | ||
375 | device->refcount++; | |
376 | list_add_tail(&device->dev_node, &device_list); | |
377 | mutex_unlock(&device_list_mutex); | |
378 | ||
379 | return device; | |
380 | } | |
381 | ||
59464ef4 | 382 | static void |
a3a5a826 | 383 | isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
384 | { |
385 | struct fast_reg_descriptor *fr_desc, *tmp; | |
386 | int i = 0; | |
387 | ||
a3a5a826 | 388 | if (list_empty(&isert_conn->conn_fr_pool)) |
59464ef4 VP |
389 | return; |
390 | ||
a3a5a826 | 391 | pr_debug("Freeing conn %p fastreg pool", isert_conn); |
59464ef4 VP |
392 | |
393 | list_for_each_entry_safe(fr_desc, tmp, | |
a3a5a826 | 394 | &isert_conn->conn_fr_pool, list) { |
59464ef4 VP |
395 | list_del(&fr_desc->list); |
396 | ib_free_fast_reg_page_list(fr_desc->data_frpl); | |
397 | ib_dereg_mr(fr_desc->data_mr); | |
398 | kfree(fr_desc); | |
399 | ++i; | |
400 | } | |
401 | ||
a3a5a826 | 402 | if (i < isert_conn->conn_fr_pool_size) |
59464ef4 | 403 | pr_warn("Pool still has %d regions registered\n", |
a3a5a826 | 404 | isert_conn->conn_fr_pool_size - i); |
59464ef4 VP |
405 | } |
406 | ||
dc87a90f SG |
407 | static int |
408 | isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, | |
409 | struct fast_reg_descriptor *fr_desc) | |
410 | { | |
411 | fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device, | |
412 | ISCSI_ISER_SG_TABLESIZE); | |
413 | if (IS_ERR(fr_desc->data_frpl)) { | |
414 | pr_err("Failed to allocate data frpl err=%ld\n", | |
415 | PTR_ERR(fr_desc->data_frpl)); | |
416 | return PTR_ERR(fr_desc->data_frpl); | |
417 | } | |
418 | ||
419 | fr_desc->data_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); | |
420 | if (IS_ERR(fr_desc->data_mr)) { | |
421 | pr_err("Failed to allocate data frmr err=%ld\n", | |
422 | PTR_ERR(fr_desc->data_mr)); | |
423 | ib_free_fast_reg_page_list(fr_desc->data_frpl); | |
424 | return PTR_ERR(fr_desc->data_mr); | |
425 | } | |
426 | pr_debug("Create fr_desc %p page_list %p\n", | |
427 | fr_desc, fr_desc->data_frpl->page_list); | |
428 | ||
429 | fr_desc->valid = true; | |
430 | ||
431 | return 0; | |
59464ef4 VP |
432 | } |
433 | ||
434 | static int | |
a3a5a826 | 435 | isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) |
59464ef4 VP |
436 | { |
437 | struct fast_reg_descriptor *fr_desc; | |
438 | struct isert_device *device = isert_conn->conn_device; | |
439 | int i, ret; | |
440 | ||
a3a5a826 SG |
441 | INIT_LIST_HEAD(&isert_conn->conn_fr_pool); |
442 | isert_conn->conn_fr_pool_size = 0; | |
59464ef4 VP |
443 | for (i = 0; i < ISCSI_DEF_XMIT_CMDS_MAX; i++) { |
444 | fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); | |
445 | if (!fr_desc) { | |
446 | pr_err("Failed to allocate fast_reg descriptor\n"); | |
447 | ret = -ENOMEM; | |
448 | goto err; | |
449 | } | |
450 | ||
dc87a90f SG |
451 | ret = isert_create_fr_desc(device->ib_device, |
452 | isert_conn->conn_pd, fr_desc); | |
453 | if (ret) { | |
454 | pr_err("Failed to create fastreg descriptor err=%d\n", | |
455 | ret); | |
a80e21b3 | 456 | kfree(fr_desc); |
59464ef4 VP |
457 | goto err; |
458 | } | |
59464ef4 | 459 | |
a3a5a826 SG |
460 | list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); |
461 | isert_conn->conn_fr_pool_size++; | |
59464ef4 VP |
462 | } |
463 | ||
a3a5a826 SG |
464 | pr_debug("Creating conn %p fastreg pool size=%d", |
465 | isert_conn, isert_conn->conn_fr_pool_size); | |
59464ef4 VP |
466 | |
467 | return 0; | |
468 | ||
469 | err: | |
a3a5a826 | 470 | isert_conn_free_fastreg_pool(isert_conn); |
59464ef4 VP |
471 | return ret; |
472 | } | |
473 | ||
b8d26b3b NB |
474 | static int |
475 | isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
476 | { | |
477 | struct iscsi_np *np = cma_id->context; | |
478 | struct isert_np *isert_np = np->np_context; | |
479 | struct isert_conn *isert_conn; | |
480 | struct isert_device *device; | |
481 | struct ib_device *ib_dev = cma_id->device; | |
482 | int ret = 0; | |
483 | ||
484 | pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n", | |
485 | cma_id, cma_id->context); | |
486 | ||
487 | isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); | |
488 | if (!isert_conn) { | |
489 | pr_err("Unable to allocate isert_conn\n"); | |
490 | return -ENOMEM; | |
491 | } | |
492 | isert_conn->state = ISER_CONN_INIT; | |
493 | INIT_LIST_HEAD(&isert_conn->conn_accept_node); | |
494 | init_completion(&isert_conn->conn_login_comp); | |
defd8848 NB |
495 | init_completion(&isert_conn->conn_wait); |
496 | init_completion(&isert_conn->conn_wait_comp_err); | |
b8d26b3b NB |
497 | kref_init(&isert_conn->conn_kref); |
498 | kref_get(&isert_conn->conn_kref); | |
b2cb9649 | 499 | mutex_init(&isert_conn->conn_mutex); |
59464ef4 | 500 | spin_lock_init(&isert_conn->conn_lock); |
b8d26b3b NB |
501 | |
502 | cma_id->context = isert_conn; | |
503 | isert_conn->conn_cm_id = cma_id; | |
504 | isert_conn->responder_resources = event->param.conn.responder_resources; | |
505 | isert_conn->initiator_depth = event->param.conn.initiator_depth; | |
506 | pr_debug("Using responder_resources: %u initiator_depth: %u\n", | |
507 | isert_conn->responder_resources, isert_conn->initiator_depth); | |
508 | ||
509 | isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + | |
510 | ISER_RX_LOGIN_SIZE, GFP_KERNEL); | |
511 | if (!isert_conn->login_buf) { | |
512 | pr_err("Unable to allocate isert_conn->login_buf\n"); | |
513 | ret = -ENOMEM; | |
514 | goto out; | |
515 | } | |
516 | ||
517 | isert_conn->login_req_buf = isert_conn->login_buf; | |
518 | isert_conn->login_rsp_buf = isert_conn->login_buf + | |
519 | ISCSI_DEF_MAX_RECV_SEG_LEN; | |
520 | pr_debug("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", | |
521 | isert_conn->login_buf, isert_conn->login_req_buf, | |
522 | isert_conn->login_rsp_buf); | |
523 | ||
524 | isert_conn->login_req_dma = ib_dma_map_single(ib_dev, | |
525 | (void *)isert_conn->login_req_buf, | |
526 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
527 | ||
528 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); | |
529 | if (ret) { | |
530 | pr_err("ib_dma_mapping_error failed for login_req_dma: %d\n", | |
531 | ret); | |
532 | isert_conn->login_req_dma = 0; | |
533 | goto out_login_buf; | |
534 | } | |
535 | ||
536 | isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, | |
537 | (void *)isert_conn->login_rsp_buf, | |
538 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
539 | ||
540 | ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); | |
541 | if (ret) { | |
542 | pr_err("ib_dma_mapping_error failed for login_rsp_dma: %d\n", | |
543 | ret); | |
544 | isert_conn->login_rsp_dma = 0; | |
545 | goto out_req_dma_map; | |
546 | } | |
547 | ||
548 | device = isert_device_find_by_ib_dev(cma_id); | |
549 | if (IS_ERR(device)) { | |
550 | ret = PTR_ERR(device); | |
551 | goto out_rsp_dma_map; | |
552 | } | |
553 | ||
554 | isert_conn->conn_device = device; | |
eb6ab132 SG |
555 | isert_conn->conn_pd = ib_alloc_pd(isert_conn->conn_device->ib_device); |
556 | if (IS_ERR(isert_conn->conn_pd)) { | |
557 | ret = PTR_ERR(isert_conn->conn_pd); | |
558 | pr_err("ib_alloc_pd failed for conn %p: ret=%d\n", | |
559 | isert_conn, ret); | |
560 | goto out_pd; | |
561 | } | |
b8d26b3b | 562 | |
eb6ab132 SG |
563 | isert_conn->conn_mr = ib_get_dma_mr(isert_conn->conn_pd, |
564 | IB_ACCESS_LOCAL_WRITE); | |
565 | if (IS_ERR(isert_conn->conn_mr)) { | |
566 | ret = PTR_ERR(isert_conn->conn_mr); | |
567 | pr_err("ib_get_dma_mr failed for conn %p: ret=%d\n", | |
568 | isert_conn, ret); | |
569 | goto out_mr; | |
570 | } | |
b8d26b3b | 571 | |
a3a5a826 SG |
572 | if (device->use_fastreg) { |
573 | ret = isert_conn_create_fastreg_pool(isert_conn); | |
59464ef4 | 574 | if (ret) { |
a3a5a826 SG |
575 | pr_err("Conn: %p failed to create fastreg pool\n", |
576 | isert_conn); | |
577 | goto out_fastreg; | |
59464ef4 VP |
578 | } |
579 | } | |
580 | ||
b8d26b3b NB |
581 | ret = isert_conn_setup_qp(isert_conn, cma_id); |
582 | if (ret) | |
583 | goto out_conn_dev; | |
584 | ||
585 | mutex_lock(&isert_np->np_accept_mutex); | |
586 | list_add_tail(&isert_np->np_accept_list, &isert_conn->conn_accept_node); | |
587 | mutex_unlock(&isert_np->np_accept_mutex); | |
588 | ||
589 | pr_debug("isert_connect_request() waking up np_accept_wq: %p\n", np); | |
590 | wake_up(&isert_np->np_accept_wq); | |
591 | return 0; | |
592 | ||
593 | out_conn_dev: | |
a3a5a826 SG |
594 | if (device->use_fastreg) |
595 | isert_conn_free_fastreg_pool(isert_conn); | |
596 | out_fastreg: | |
eb6ab132 SG |
597 | ib_dereg_mr(isert_conn->conn_mr); |
598 | out_mr: | |
599 | ib_dealloc_pd(isert_conn->conn_pd); | |
600 | out_pd: | |
b8d26b3b NB |
601 | isert_device_try_release(device); |
602 | out_rsp_dma_map: | |
603 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
604 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
605 | out_req_dma_map: | |
606 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
607 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); | |
608 | out_login_buf: | |
609 | kfree(isert_conn->login_buf); | |
610 | out: | |
611 | kfree(isert_conn); | |
612 | return ret; | |
613 | } | |
614 | ||
615 | static void | |
616 | isert_connect_release(struct isert_conn *isert_conn) | |
617 | { | |
618 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
619 | struct isert_device *device = isert_conn->conn_device; | |
620 | int cq_index; | |
621 | ||
622 | pr_debug("Entering isert_connect_release(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); | |
623 | ||
a3a5a826 SG |
624 | if (device && device->use_fastreg) |
625 | isert_conn_free_fastreg_pool(isert_conn); | |
59464ef4 | 626 | |
b8d26b3b NB |
627 | if (isert_conn->conn_qp) { |
628 | cq_index = ((struct isert_cq_desc *) | |
629 | isert_conn->conn_qp->recv_cq->cq_context)->cq_index; | |
630 | pr_debug("isert_connect_release: cq_index: %d\n", cq_index); | |
631 | isert_conn->conn_device->cq_active_qps[cq_index]--; | |
632 | ||
633 | rdma_destroy_qp(isert_conn->conn_cm_id); | |
634 | } | |
635 | ||
636 | isert_free_rx_descriptors(isert_conn); | |
637 | rdma_destroy_id(isert_conn->conn_cm_id); | |
638 | ||
eb6ab132 SG |
639 | ib_dereg_mr(isert_conn->conn_mr); |
640 | ib_dealloc_pd(isert_conn->conn_pd); | |
641 | ||
b8d26b3b NB |
642 | if (isert_conn->login_buf) { |
643 | ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, | |
644 | ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); | |
645 | ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, | |
646 | ISCSI_DEF_MAX_RECV_SEG_LEN, | |
647 | DMA_FROM_DEVICE); | |
648 | kfree(isert_conn->login_buf); | |
649 | } | |
650 | kfree(isert_conn); | |
651 | ||
652 | if (device) | |
653 | isert_device_try_release(device); | |
654 | ||
655 | pr_debug("Leaving isert_connect_release >>>>>>>>>>>>\n"); | |
656 | } | |
657 | ||
658 | static void | |
659 | isert_connected_handler(struct rdma_cm_id *cma_id) | |
660 | { | |
661 | return; | |
662 | } | |
663 | ||
664 | static void | |
665 | isert_release_conn_kref(struct kref *kref) | |
666 | { | |
667 | struct isert_conn *isert_conn = container_of(kref, | |
668 | struct isert_conn, conn_kref); | |
669 | ||
670 | pr_debug("Calling isert_connect_release for final kref %s/%d\n", | |
671 | current->comm, current->pid); | |
672 | ||
673 | isert_connect_release(isert_conn); | |
674 | } | |
675 | ||
676 | static void | |
677 | isert_put_conn(struct isert_conn *isert_conn) | |
678 | { | |
679 | kref_put(&isert_conn->conn_kref, isert_release_conn_kref); | |
680 | } | |
681 | ||
682 | static void | |
683 | isert_disconnect_work(struct work_struct *work) | |
684 | { | |
685 | struct isert_conn *isert_conn = container_of(work, | |
686 | struct isert_conn, conn_logout_work); | |
687 | ||
688 | pr_debug("isert_disconnect_work(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); | |
b2cb9649 | 689 | mutex_lock(&isert_conn->conn_mutex); |
defd8848 NB |
690 | if (isert_conn->state == ISER_CONN_UP) |
691 | isert_conn->state = ISER_CONN_TERMINATING; | |
b8d26b3b NB |
692 | |
693 | if (isert_conn->post_recv_buf_count == 0 && | |
694 | atomic_read(&isert_conn->post_send_buf_count) == 0) { | |
b2cb9649 NB |
695 | mutex_unlock(&isert_conn->conn_mutex); |
696 | goto wake_up; | |
697 | } | |
698 | if (!isert_conn->conn_cm_id) { | |
699 | mutex_unlock(&isert_conn->conn_mutex); | |
700 | isert_put_conn(isert_conn); | |
701 | return; | |
b8d26b3b | 702 | } |
b2cb9649 NB |
703 | if (!isert_conn->logout_posted) { |
704 | pr_debug("Calling rdma_disconnect for !logout_posted from" | |
705 | " isert_disconnect_work\n"); | |
706 | rdma_disconnect(isert_conn->conn_cm_id); | |
707 | mutex_unlock(&isert_conn->conn_mutex); | |
708 | iscsit_cause_connection_reinstatement(isert_conn->conn, 0); | |
709 | goto wake_up; | |
b8d26b3b | 710 | } |
b2cb9649 | 711 | mutex_unlock(&isert_conn->conn_mutex); |
b8d26b3b | 712 | |
b2cb9649 | 713 | wake_up: |
defd8848 | 714 | complete(&isert_conn->conn_wait); |
b8d26b3b NB |
715 | isert_put_conn(isert_conn); |
716 | } | |
717 | ||
718 | static void | |
719 | isert_disconnected_handler(struct rdma_cm_id *cma_id) | |
720 | { | |
721 | struct isert_conn *isert_conn = (struct isert_conn *)cma_id->context; | |
722 | ||
723 | INIT_WORK(&isert_conn->conn_logout_work, isert_disconnect_work); | |
724 | schedule_work(&isert_conn->conn_logout_work); | |
725 | } | |
726 | ||
727 | static int | |
728 | isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) | |
729 | { | |
730 | int ret = 0; | |
731 | ||
732 | pr_debug("isert_cma_handler: event %d status %d conn %p id %p\n", | |
733 | event->event, event->status, cma_id->context, cma_id); | |
734 | ||
735 | switch (event->event) { | |
736 | case RDMA_CM_EVENT_CONNECT_REQUEST: | |
737 | pr_debug("RDMA_CM_EVENT_CONNECT_REQUEST: >>>>>>>>>>>>>>>\n"); | |
738 | ret = isert_connect_request(cma_id, event); | |
739 | break; | |
740 | case RDMA_CM_EVENT_ESTABLISHED: | |
741 | pr_debug("RDMA_CM_EVENT_ESTABLISHED >>>>>>>>>>>>>>\n"); | |
742 | isert_connected_handler(cma_id); | |
743 | break; | |
744 | case RDMA_CM_EVENT_DISCONNECTED: | |
745 | pr_debug("RDMA_CM_EVENT_DISCONNECTED: >>>>>>>>>>>>>>\n"); | |
746 | isert_disconnected_handler(cma_id); | |
747 | break; | |
748 | case RDMA_CM_EVENT_DEVICE_REMOVAL: | |
749 | case RDMA_CM_EVENT_ADDR_CHANGE: | |
750 | break; | |
751 | case RDMA_CM_EVENT_CONNECT_ERROR: | |
752 | default: | |
753 | pr_err("Unknown RDMA CMA event: %d\n", event->event); | |
754 | break; | |
755 | } | |
756 | ||
757 | if (ret != 0) { | |
758 | pr_err("isert_cma_handler failed RDMA_CM_EVENT: 0x%08x %d\n", | |
759 | event->event, ret); | |
760 | dump_stack(); | |
761 | } | |
762 | ||
763 | return ret; | |
764 | } | |
765 | ||
766 | static int | |
767 | isert_post_recv(struct isert_conn *isert_conn, u32 count) | |
768 | { | |
769 | struct ib_recv_wr *rx_wr, *rx_wr_failed; | |
770 | int i, ret; | |
771 | unsigned int rx_head = isert_conn->conn_rx_desc_head; | |
772 | struct iser_rx_desc *rx_desc; | |
773 | ||
774 | for (rx_wr = isert_conn->conn_rx_wr, i = 0; i < count; i++, rx_wr++) { | |
775 | rx_desc = &isert_conn->conn_rx_descs[rx_head]; | |
776 | rx_wr->wr_id = (unsigned long)rx_desc; | |
777 | rx_wr->sg_list = &rx_desc->rx_sg; | |
778 | rx_wr->num_sge = 1; | |
779 | rx_wr->next = rx_wr + 1; | |
780 | rx_head = (rx_head + 1) & (ISERT_QP_MAX_RECV_DTOS - 1); | |
781 | } | |
782 | ||
783 | rx_wr--; | |
784 | rx_wr->next = NULL; /* mark end of work requests list */ | |
785 | ||
786 | isert_conn->post_recv_buf_count += count; | |
787 | ret = ib_post_recv(isert_conn->conn_qp, isert_conn->conn_rx_wr, | |
788 | &rx_wr_failed); | |
789 | if (ret) { | |
790 | pr_err("ib_post_recv() failed with ret: %d\n", ret); | |
791 | isert_conn->post_recv_buf_count -= count; | |
792 | } else { | |
793 | pr_debug("isert_post_recv(): Posted %d RX buffers\n", count); | |
794 | isert_conn->conn_rx_desc_head = rx_head; | |
795 | } | |
796 | return ret; | |
797 | } | |
798 | ||
799 | static int | |
800 | isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) | |
801 | { | |
802 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
803 | struct ib_send_wr send_wr, *send_wr_failed; | |
804 | int ret; | |
805 | ||
806 | ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, | |
807 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
808 | ||
809 | send_wr.next = NULL; | |
810 | send_wr.wr_id = (unsigned long)tx_desc; | |
811 | send_wr.sg_list = tx_desc->tx_sg; | |
812 | send_wr.num_sge = tx_desc->num_sge; | |
813 | send_wr.opcode = IB_WR_SEND; | |
814 | send_wr.send_flags = IB_SEND_SIGNALED; | |
815 | ||
816 | atomic_inc(&isert_conn->post_send_buf_count); | |
817 | ||
818 | ret = ib_post_send(isert_conn->conn_qp, &send_wr, &send_wr_failed); | |
819 | if (ret) { | |
820 | pr_err("ib_post_send() failed, ret: %d\n", ret); | |
821 | atomic_dec(&isert_conn->post_send_buf_count); | |
822 | } | |
823 | ||
824 | return ret; | |
825 | } | |
826 | ||
827 | static void | |
828 | isert_create_send_desc(struct isert_conn *isert_conn, | |
829 | struct isert_cmd *isert_cmd, | |
830 | struct iser_tx_desc *tx_desc) | |
831 | { | |
832 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
833 | ||
834 | ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, | |
835 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
836 | ||
837 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); | |
838 | tx_desc->iser_header.flags = ISER_VER; | |
839 | ||
840 | tx_desc->num_sge = 1; | |
841 | tx_desc->isert_cmd = isert_cmd; | |
842 | ||
843 | if (tx_desc->tx_sg[0].lkey != isert_conn->conn_mr->lkey) { | |
844 | tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey; | |
845 | pr_debug("tx_desc %p lkey mismatch, fixing\n", tx_desc); | |
846 | } | |
847 | } | |
848 | ||
849 | static int | |
850 | isert_init_tx_hdrs(struct isert_conn *isert_conn, | |
851 | struct iser_tx_desc *tx_desc) | |
852 | { | |
853 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
854 | u64 dma_addr; | |
855 | ||
856 | dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, | |
857 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
858 | if (ib_dma_mapping_error(ib_dev, dma_addr)) { | |
859 | pr_err("ib_dma_mapping_error() failed\n"); | |
860 | return -ENOMEM; | |
861 | } | |
862 | ||
863 | tx_desc->dma_addr = dma_addr; | |
864 | tx_desc->tx_sg[0].addr = tx_desc->dma_addr; | |
865 | tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; | |
866 | tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey; | |
867 | ||
868 | pr_debug("isert_init_tx_hdrs: Setup tx_sg[0].addr: 0x%llx length: %u" | |
869 | " lkey: 0x%08x\n", tx_desc->tx_sg[0].addr, | |
870 | tx_desc->tx_sg[0].length, tx_desc->tx_sg[0].lkey); | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
875 | static void | |
95b60f07 NB |
876 | isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, |
877 | struct ib_send_wr *send_wr, bool coalesce) | |
b8d26b3b | 878 | { |
95b60f07 NB |
879 | struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; |
880 | ||
b8d26b3b NB |
881 | isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; |
882 | send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc; | |
883 | send_wr->opcode = IB_WR_SEND; | |
95b60f07 | 884 | send_wr->sg_list = &tx_desc->tx_sg[0]; |
b8d26b3b | 885 | send_wr->num_sge = isert_cmd->tx_desc.num_sge; |
95b60f07 NB |
886 | /* |
887 | * Coalesce send completion interrupts by only setting IB_SEND_SIGNALED | |
888 | * bit for every ISERT_COMP_BATCH_COUNT number of ib_post_send() calls. | |
889 | */ | |
ebbe4421 NB |
890 | mutex_lock(&isert_conn->conn_mutex); |
891 | if (coalesce && isert_conn->state == ISER_CONN_UP && | |
95b60f07 | 892 | ++isert_conn->conn_comp_batch < ISERT_COMP_BATCH_COUNT) { |
ebbe4421 | 893 | tx_desc->llnode_active = true; |
95b60f07 | 894 | llist_add(&tx_desc->comp_llnode, &isert_conn->conn_comp_llist); |
ebbe4421 | 895 | mutex_unlock(&isert_conn->conn_mutex); |
95b60f07 NB |
896 | return; |
897 | } | |
898 | isert_conn->conn_comp_batch = 0; | |
899 | tx_desc->comp_llnode_batch = llist_del_all(&isert_conn->conn_comp_llist); | |
ebbe4421 | 900 | mutex_unlock(&isert_conn->conn_mutex); |
95b60f07 NB |
901 | |
902 | send_wr->send_flags = IB_SEND_SIGNALED; | |
b8d26b3b NB |
903 | } |
904 | ||
905 | static int | |
906 | isert_rdma_post_recvl(struct isert_conn *isert_conn) | |
907 | { | |
908 | struct ib_recv_wr rx_wr, *rx_wr_fail; | |
909 | struct ib_sge sge; | |
910 | int ret; | |
911 | ||
912 | memset(&sge, 0, sizeof(struct ib_sge)); | |
913 | sge.addr = isert_conn->login_req_dma; | |
914 | sge.length = ISER_RX_LOGIN_SIZE; | |
915 | sge.lkey = isert_conn->conn_mr->lkey; | |
916 | ||
917 | pr_debug("Setup sge: addr: %llx length: %d 0x%08x\n", | |
918 | sge.addr, sge.length, sge.lkey); | |
919 | ||
920 | memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); | |
921 | rx_wr.wr_id = (unsigned long)isert_conn->login_req_buf; | |
922 | rx_wr.sg_list = &sge; | |
923 | rx_wr.num_sge = 1; | |
924 | ||
925 | isert_conn->post_recv_buf_count++; | |
926 | ret = ib_post_recv(isert_conn->conn_qp, &rx_wr, &rx_wr_fail); | |
927 | if (ret) { | |
928 | pr_err("ib_post_recv() failed: %d\n", ret); | |
929 | isert_conn->post_recv_buf_count--; | |
930 | } | |
931 | ||
932 | pr_debug("ib_post_recv(): returned success >>>>>>>>>>>>>>>>>>>>>>>>\n"); | |
933 | return ret; | |
934 | } | |
935 | ||
936 | static int | |
937 | isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
938 | u32 length) | |
939 | { | |
940 | struct isert_conn *isert_conn = conn->context; | |
941 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
942 | struct iser_tx_desc *tx_desc = &isert_conn->conn_login_tx_desc; | |
943 | int ret; | |
944 | ||
945 | isert_create_send_desc(isert_conn, NULL, tx_desc); | |
946 | ||
947 | memcpy(&tx_desc->iscsi_header, &login->rsp[0], | |
948 | sizeof(struct iscsi_hdr)); | |
949 | ||
950 | isert_init_tx_hdrs(isert_conn, tx_desc); | |
951 | ||
952 | if (length > 0) { | |
953 | struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; | |
954 | ||
955 | ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, | |
956 | length, DMA_TO_DEVICE); | |
957 | ||
958 | memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); | |
959 | ||
960 | ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, | |
961 | length, DMA_TO_DEVICE); | |
962 | ||
963 | tx_dsg->addr = isert_conn->login_rsp_dma; | |
964 | tx_dsg->length = length; | |
965 | tx_dsg->lkey = isert_conn->conn_mr->lkey; | |
966 | tx_desc->num_sge = 2; | |
967 | } | |
968 | if (!login->login_failed) { | |
969 | if (login->login_complete) { | |
970 | ret = isert_alloc_rx_descriptors(isert_conn); | |
971 | if (ret) | |
972 | return ret; | |
973 | ||
974 | ret = isert_post_recv(isert_conn, ISERT_MIN_POSTED_RX); | |
975 | if (ret) | |
976 | return ret; | |
977 | ||
978 | isert_conn->state = ISER_CONN_UP; | |
979 | goto post_send; | |
980 | } | |
981 | ||
982 | ret = isert_rdma_post_recvl(isert_conn); | |
983 | if (ret) | |
984 | return ret; | |
985 | } | |
986 | post_send: | |
987 | ret = isert_post_send(isert_conn, tx_desc); | |
988 | if (ret) | |
989 | return ret; | |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
994 | static void | |
995 | isert_rx_login_req(struct iser_rx_desc *rx_desc, int rx_buflen, | |
996 | struct isert_conn *isert_conn) | |
997 | { | |
998 | struct iscsi_conn *conn = isert_conn->conn; | |
999 | struct iscsi_login *login = conn->conn_login; | |
1000 | int size; | |
1001 | ||
1002 | if (!login) { | |
1003 | pr_err("conn->conn_login is NULL\n"); | |
1004 | dump_stack(); | |
1005 | return; | |
1006 | } | |
1007 | ||
1008 | if (login->first_request) { | |
1009 | struct iscsi_login_req *login_req = | |
1010 | (struct iscsi_login_req *)&rx_desc->iscsi_header; | |
1011 | /* | |
1012 | * Setup the initial iscsi_login values from the leading | |
1013 | * login request PDU. | |
1014 | */ | |
1015 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
1016 | login->current_stage = | |
1017 | (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) | |
1018 | >> 2; | |
1019 | login->version_min = login_req->min_version; | |
1020 | login->version_max = login_req->max_version; | |
1021 | memcpy(login->isid, login_req->isid, 6); | |
1022 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1023 | login->init_task_tag = login_req->itt; | |
1024 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1025 | login->cid = be16_to_cpu(login_req->cid); | |
1026 | login->tsih = be16_to_cpu(login_req->tsih); | |
1027 | } | |
1028 | ||
1029 | memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); | |
1030 | ||
1031 | size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); | |
1032 | pr_debug("Using login payload size: %d, rx_buflen: %d MAX_KEY_VALUE_PAIRS: %d\n", | |
1033 | size, rx_buflen, MAX_KEY_VALUE_PAIRS); | |
1034 | memcpy(login->req_buf, &rx_desc->data[0], size); | |
1035 | ||
6faaa85f NB |
1036 | if (login->first_request) { |
1037 | complete(&isert_conn->conn_login_comp); | |
1038 | return; | |
1039 | } | |
1040 | schedule_delayed_work(&conn->login_work, 0); | |
b8d26b3b NB |
1041 | } |
1042 | ||
b8d26b3b | 1043 | static struct iscsi_cmd |
676687c6 | 1044 | *isert_allocate_cmd(struct iscsi_conn *conn) |
b8d26b3b NB |
1045 | { |
1046 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; | |
1047 | struct isert_cmd *isert_cmd; | |
d703ce2f | 1048 | struct iscsi_cmd *cmd; |
b8d26b3b | 1049 | |
676687c6 | 1050 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
d703ce2f NB |
1051 | if (!cmd) { |
1052 | pr_err("Unable to allocate iscsi_cmd + isert_cmd\n"); | |
b8d26b3b NB |
1053 | return NULL; |
1054 | } | |
d703ce2f | 1055 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 1056 | isert_cmd->conn = isert_conn; |
d703ce2f | 1057 | isert_cmd->iscsi_cmd = cmd; |
b8d26b3b | 1058 | |
d703ce2f | 1059 | return cmd; |
b8d26b3b NB |
1060 | } |
1061 | ||
1062 | static int | |
1063 | isert_handle_scsi_cmd(struct isert_conn *isert_conn, | |
d703ce2f NB |
1064 | struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, |
1065 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
b8d26b3b | 1066 | { |
b8d26b3b NB |
1067 | struct iscsi_conn *conn = isert_conn->conn; |
1068 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1069 | struct scatterlist *sg; | |
1070 | int imm_data, imm_data_len, unsol_data, sg_nents, rc; | |
1071 | bool dump_payload = false; | |
1072 | ||
1073 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1074 | if (rc < 0) | |
1075 | return rc; | |
1076 | ||
1077 | imm_data = cmd->immediate_data; | |
1078 | imm_data_len = cmd->first_burst_len; | |
1079 | unsol_data = cmd->unsolicited_data; | |
1080 | ||
1081 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1082 | if (rc < 0) { | |
1083 | return 0; | |
1084 | } else if (rc > 0) { | |
1085 | dump_payload = true; | |
1086 | goto sequence_cmd; | |
1087 | } | |
1088 | ||
1089 | if (!imm_data) | |
1090 | return 0; | |
1091 | ||
1092 | sg = &cmd->se_cmd.t_data_sg[0]; | |
1093 | sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); | |
1094 | ||
1095 | pr_debug("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n", | |
1096 | sg, sg_nents, &rx_desc->data[0], imm_data_len); | |
1097 | ||
1098 | sg_copy_from_buffer(sg, sg_nents, &rx_desc->data[0], imm_data_len); | |
1099 | ||
1100 | cmd->write_data_done += imm_data_len; | |
1101 | ||
1102 | if (cmd->write_data_done == cmd->se_cmd.data_length) { | |
1103 | spin_lock_bh(&cmd->istate_lock); | |
1104 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1105 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1106 | spin_unlock_bh(&cmd->istate_lock); | |
1107 | } | |
1108 | ||
1109 | sequence_cmd: | |
561bf158 | 1110 | rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
b8d26b3b NB |
1111 | |
1112 | if (!rc && dump_payload == false && unsol_data) | |
1113 | iscsit_set_unsoliticed_dataout(cmd); | |
1114 | ||
b8d26b3b NB |
1115 | return 0; |
1116 | } | |
1117 | ||
1118 | static int | |
1119 | isert_handle_iscsi_dataout(struct isert_conn *isert_conn, | |
1120 | struct iser_rx_desc *rx_desc, unsigned char *buf) | |
1121 | { | |
1122 | struct scatterlist *sg_start; | |
1123 | struct iscsi_conn *conn = isert_conn->conn; | |
1124 | struct iscsi_cmd *cmd = NULL; | |
1125 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1126 | u32 unsol_data_len = ntoh24(hdr->dlength); | |
1127 | int rc, sg_nents, sg_off, page_off; | |
1128 | ||
1129 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1130 | if (rc < 0) | |
1131 | return rc; | |
1132 | else if (!cmd) | |
1133 | return 0; | |
1134 | /* | |
1135 | * FIXME: Unexpected unsolicited_data out | |
1136 | */ | |
1137 | if (!cmd->unsolicited_data) { | |
1138 | pr_err("Received unexpected solicited data payload\n"); | |
1139 | dump_stack(); | |
1140 | return -1; | |
1141 | } | |
1142 | ||
1143 | pr_debug("Unsolicited DataOut unsol_data_len: %u, write_data_done: %u, data_length: %u\n", | |
1144 | unsol_data_len, cmd->write_data_done, cmd->se_cmd.data_length); | |
1145 | ||
1146 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
1147 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
1148 | sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); | |
1149 | page_off = cmd->write_data_done % PAGE_SIZE; | |
1150 | /* | |
1151 | * FIXME: Non page-aligned unsolicited_data out | |
1152 | */ | |
1153 | if (page_off) { | |
1154 | pr_err("Received unexpected non-page aligned data payload\n"); | |
1155 | dump_stack(); | |
1156 | return -1; | |
1157 | } | |
1158 | pr_debug("Copying DataOut: sg_start: %p, sg_off: %u sg_nents: %u from %p %u\n", | |
1159 | sg_start, sg_off, sg_nents, &rx_desc->data[0], unsol_data_len); | |
1160 | ||
1161 | sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], | |
1162 | unsol_data_len); | |
1163 | ||
1164 | rc = iscsit_check_dataout_payload(cmd, hdr, false); | |
1165 | if (rc < 0) | |
1166 | return rc; | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
778de368 NB |
1171 | static int |
1172 | isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1173 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1174 | unsigned char *buf) | |
778de368 | 1175 | { |
778de368 NB |
1176 | struct iscsi_conn *conn = isert_conn->conn; |
1177 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1178 | int rc; | |
1179 | ||
1180 | rc = iscsit_setup_nop_out(conn, cmd, hdr); | |
1181 | if (rc < 0) | |
1182 | return rc; | |
1183 | /* | |
1184 | * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload | |
1185 | */ | |
1186 | ||
1187 | return iscsit_process_nop_out(conn, cmd, hdr); | |
1188 | } | |
1189 | ||
adb54c29 NB |
1190 | static int |
1191 | isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
d703ce2f NB |
1192 | struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, |
1193 | struct iscsi_text *hdr) | |
adb54c29 | 1194 | { |
adb54c29 NB |
1195 | struct iscsi_conn *conn = isert_conn->conn; |
1196 | u32 payload_length = ntoh24(hdr->dlength); | |
1197 | int rc; | |
1198 | unsigned char *text_in; | |
1199 | ||
1200 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
1201 | if (rc < 0) | |
1202 | return rc; | |
1203 | ||
1204 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
1205 | if (!text_in) { | |
1206 | pr_err("Unable to allocate text_in of payload_length: %u\n", | |
1207 | payload_length); | |
1208 | return -ENOMEM; | |
1209 | } | |
1210 | cmd->text_in_ptr = text_in; | |
1211 | ||
1212 | memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); | |
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 | { | |
1222 | struct iscsi_hdr *hdr = &rx_desc->iscsi_header; | |
1223 | struct iscsi_conn *conn = isert_conn->conn; | |
ca40d24e | 1224 | struct iscsi_session *sess = conn->sess; |
b8d26b3b NB |
1225 | struct iscsi_cmd *cmd; |
1226 | struct isert_cmd *isert_cmd; | |
1227 | int ret = -EINVAL; | |
1228 | u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); | |
1229 | ||
ca40d24e NB |
1230 | if (sess->sess_ops->SessionType && |
1231 | (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { | |
1232 | pr_err("Got illegal opcode: 0x%02x in SessionType=Discovery," | |
1233 | " ignoring\n", opcode); | |
1234 | return 0; | |
1235 | } | |
1236 | ||
b8d26b3b NB |
1237 | switch (opcode) { |
1238 | case ISCSI_OP_SCSI_CMD: | |
676687c6 | 1239 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1240 | if (!cmd) |
1241 | break; | |
1242 | ||
d703ce2f | 1243 | isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1244 | isert_cmd->read_stag = read_stag; |
1245 | isert_cmd->read_va = read_va; | |
1246 | isert_cmd->write_stag = write_stag; | |
1247 | isert_cmd->write_va = write_va; | |
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: | |
676687c6 | 1253 | cmd = isert_allocate_cmd(conn); |
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: | |
676687c6 | 1266 | cmd = isert_allocate_cmd(conn); |
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: | |
676687c6 | 1274 | cmd = isert_allocate_cmd(conn); |
b8d26b3b NB |
1275 | if (!cmd) |
1276 | break; | |
1277 | ||
1278 | ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); | |
1279 | if (ret > 0) | |
1280 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
1281 | SECONDS_FOR_LOGOUT_COMP * | |
1282 | HZ); | |
1283 | break; | |
adb54c29 | 1284 | case ISCSI_OP_TEXT: |
676687c6 | 1285 | cmd = isert_allocate_cmd(conn); |
adb54c29 NB |
1286 | if (!cmd) |
1287 | break; | |
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 NB |
1293 | default: |
1294 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); | |
1295 | dump_stack(); | |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | return ret; | |
1300 | } | |
1301 | ||
1302 | static void | |
1303 | isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) | |
1304 | { | |
1305 | struct iser_hdr *iser_hdr = &rx_desc->iser_header; | |
1306 | uint64_t read_va = 0, write_va = 0; | |
1307 | uint32_t read_stag = 0, write_stag = 0; | |
1308 | int rc; | |
1309 | ||
1310 | switch (iser_hdr->flags & 0xF0) { | |
1311 | case ISCSI_CTRL: | |
1312 | if (iser_hdr->flags & ISER_RSV) { | |
1313 | read_stag = be32_to_cpu(iser_hdr->read_stag); | |
1314 | read_va = be64_to_cpu(iser_hdr->read_va); | |
1315 | pr_debug("ISER_RSV: read_stag: 0x%08x read_va: 0x%16llx\n", | |
1316 | read_stag, (unsigned long long)read_va); | |
1317 | } | |
1318 | if (iser_hdr->flags & ISER_WSV) { | |
1319 | write_stag = be32_to_cpu(iser_hdr->write_stag); | |
1320 | write_va = be64_to_cpu(iser_hdr->write_va); | |
1321 | pr_debug("ISER_WSV: write__stag: 0x%08x write_va: 0x%16llx\n", | |
1322 | write_stag, (unsigned long long)write_va); | |
1323 | } | |
1324 | ||
1325 | pr_debug("ISER ISCSI_CTRL PDU\n"); | |
1326 | break; | |
1327 | case ISER_HELLO: | |
1328 | pr_err("iSER Hello message\n"); | |
1329 | break; | |
1330 | default: | |
1331 | pr_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags); | |
1332 | break; | |
1333 | } | |
1334 | ||
1335 | rc = isert_rx_opcode(isert_conn, rx_desc, | |
1336 | read_stag, read_va, write_stag, write_va); | |
1337 | } | |
1338 | ||
1339 | static void | |
1340 | isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn, | |
1341 | unsigned long xfer_len) | |
1342 | { | |
1343 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
1344 | struct iscsi_hdr *hdr; | |
1345 | u64 rx_dma; | |
1346 | int rx_buflen, outstanding; | |
1347 | ||
1348 | if ((char *)desc == isert_conn->login_req_buf) { | |
1349 | rx_dma = isert_conn->login_req_dma; | |
1350 | rx_buflen = ISER_RX_LOGIN_SIZE; | |
1351 | pr_debug("ISER login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", | |
1352 | rx_dma, rx_buflen); | |
1353 | } else { | |
1354 | rx_dma = desc->dma_addr; | |
1355 | rx_buflen = ISER_RX_PAYLOAD_SIZE; | |
1356 | pr_debug("ISER req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", | |
1357 | rx_dma, rx_buflen); | |
1358 | } | |
1359 | ||
1360 | ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); | |
1361 | ||
1362 | hdr = &desc->iscsi_header; | |
1363 | pr_debug("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", | |
1364 | hdr->opcode, hdr->itt, hdr->flags, | |
1365 | (int)(xfer_len - ISER_HEADERS_LEN)); | |
1366 | ||
1367 | if ((char *)desc == isert_conn->login_req_buf) | |
1368 | isert_rx_login_req(desc, xfer_len - ISER_HEADERS_LEN, | |
1369 | isert_conn); | |
1370 | else | |
1371 | isert_rx_do_work(desc, isert_conn); | |
1372 | ||
1373 | ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, | |
1374 | DMA_FROM_DEVICE); | |
1375 | ||
1376 | isert_conn->post_recv_buf_count--; | |
1377 | pr_debug("iSERT: Decremented post_recv_buf_count: %d\n", | |
1378 | isert_conn->post_recv_buf_count); | |
1379 | ||
1380 | if ((char *)desc == isert_conn->login_req_buf) | |
1381 | return; | |
1382 | ||
1383 | outstanding = isert_conn->post_recv_buf_count; | |
1384 | if (outstanding + ISERT_MIN_POSTED_RX <= ISERT_QP_MAX_RECV_DTOS) { | |
1385 | int err, count = min(ISERT_QP_MAX_RECV_DTOS - outstanding, | |
1386 | ISERT_MIN_POSTED_RX); | |
1387 | err = isert_post_recv(isert_conn, count); | |
1388 | if (err) { | |
1389 | pr_err("isert_post_recv() count: %d failed, %d\n", | |
1390 | count, err); | |
1391 | } | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | static void | |
1396 | isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) | |
1397 | { | |
1398 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
1399 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
1400 | ||
90ecc6e2 | 1401 | pr_debug("isert_unmap_cmd: %p\n", isert_cmd); |
b8d26b3b | 1402 | if (wr->sge) { |
90ecc6e2 VP |
1403 | pr_debug("isert_unmap_cmd: %p unmap_sg op\n", isert_cmd); |
1404 | ib_dma_unmap_sg(ib_dev, wr->sge, wr->num_sge, | |
1405 | (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? | |
1406 | DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
b8d26b3b NB |
1407 | wr->sge = NULL; |
1408 | } | |
1409 | ||
90ecc6e2 VP |
1410 | if (wr->send_wr) { |
1411 | pr_debug("isert_unmap_cmd: %p free send_wr\n", isert_cmd); | |
1412 | kfree(wr->send_wr); | |
1413 | wr->send_wr = NULL; | |
1414 | } | |
b8d26b3b | 1415 | |
90ecc6e2 VP |
1416 | if (wr->ib_sge) { |
1417 | pr_debug("isert_unmap_cmd: %p free ib_sge\n", isert_cmd); | |
1418 | kfree(wr->ib_sge); | |
1419 | wr->ib_sge = NULL; | |
1420 | } | |
b8d26b3b NB |
1421 | } |
1422 | ||
59464ef4 | 1423 | static void |
a3a5a826 | 1424 | isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) |
59464ef4 VP |
1425 | { |
1426 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
1427 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
1428 | LIST_HEAD(unmap_list); | |
1429 | ||
a3a5a826 | 1430 | pr_debug("unreg_fastreg_cmd: %p\n", isert_cmd); |
59464ef4 VP |
1431 | |
1432 | if (wr->fr_desc) { | |
a3a5a826 | 1433 | pr_debug("unreg_fastreg_cmd: %p free fr_desc %p\n", |
59464ef4 VP |
1434 | isert_cmd, wr->fr_desc); |
1435 | spin_lock_bh(&isert_conn->conn_lock); | |
a3a5a826 | 1436 | list_add_tail(&wr->fr_desc->list, &isert_conn->conn_fr_pool); |
59464ef4 VP |
1437 | spin_unlock_bh(&isert_conn->conn_lock); |
1438 | wr->fr_desc = NULL; | |
1439 | } | |
1440 | ||
1441 | if (wr->sge) { | |
a3a5a826 | 1442 | pr_debug("unreg_fastreg_cmd: %p unmap_sg op\n", isert_cmd); |
59464ef4 VP |
1443 | ib_dma_unmap_sg(ib_dev, wr->sge, wr->num_sge, |
1444 | (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? | |
1445 | DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
1446 | wr->sge = NULL; | |
1447 | } | |
1448 | ||
1449 | wr->ib_sge = NULL; | |
1450 | wr->send_wr = NULL; | |
1451 | } | |
1452 | ||
b8d26b3b NB |
1453 | static void |
1454 | isert_put_cmd(struct isert_cmd *isert_cmd) | |
1455 | { | |
d703ce2f | 1456 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1457 | struct isert_conn *isert_conn = isert_cmd->conn; |
186a9647 | 1458 | struct iscsi_conn *conn = isert_conn->conn; |
d40945d8 | 1459 | struct isert_device *device = isert_conn->conn_device; |
b8d26b3b NB |
1460 | |
1461 | pr_debug("Entering isert_put_cmd: %p\n", isert_cmd); | |
1462 | ||
1463 | switch (cmd->iscsi_opcode) { | |
1464 | case ISCSI_OP_SCSI_CMD: | |
b8d26b3b NB |
1465 | spin_lock_bh(&conn->cmd_lock); |
1466 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1467 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1468 | spin_unlock_bh(&conn->cmd_lock); |
1469 | ||
1470 | if (cmd->data_direction == DMA_TO_DEVICE) | |
1471 | iscsit_stop_dataout_timer(cmd); | |
1472 | ||
d40945d8 | 1473 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
186a9647 NB |
1474 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1475 | break; | |
b8d26b3b | 1476 | case ISCSI_OP_SCSI_TMFUNC: |
186a9647 NB |
1477 | spin_lock_bh(&conn->cmd_lock); |
1478 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1479 | list_del_init(&cmd->i_conn_node); |
186a9647 NB |
1480 | spin_unlock_bh(&conn->cmd_lock); |
1481 | ||
b8d26b3b NB |
1482 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1483 | break; | |
1484 | case ISCSI_OP_REJECT: | |
1485 | case ISCSI_OP_NOOP_OUT: | |
adb54c29 | 1486 | case ISCSI_OP_TEXT: |
b8d26b3b NB |
1487 | spin_lock_bh(&conn->cmd_lock); |
1488 | if (!list_empty(&cmd->i_conn_node)) | |
5159d763 | 1489 | list_del_init(&cmd->i_conn_node); |
b8d26b3b NB |
1490 | spin_unlock_bh(&conn->cmd_lock); |
1491 | ||
1492 | /* | |
1493 | * Handle special case for REJECT when iscsi_add_reject*() has | |
1494 | * overwritten the original iscsi_opcode assignment, and the | |
1495 | * associated cmd->se_cmd needs to be released. | |
1496 | */ | |
1497 | if (cmd->se_cmd.se_tfo != NULL) { | |
3df8f68a NB |
1498 | pr_debug("Calling transport_generic_free_cmd from" |
1499 | " isert_put_cmd for 0x%02x\n", | |
1500 | cmd->iscsi_opcode); | |
b8d26b3b NB |
1501 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
1502 | break; | |
1503 | } | |
1504 | /* | |
1505 | * Fall-through | |
1506 | */ | |
1507 | default: | |
d703ce2f | 1508 | iscsit_release_cmd(cmd); |
b8d26b3b NB |
1509 | break; |
1510 | } | |
1511 | } | |
1512 | ||
1513 | static void | |
1514 | isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) | |
1515 | { | |
1516 | if (tx_desc->dma_addr != 0) { | |
1517 | pr_debug("Calling ib_dma_unmap_single for tx_desc->dma_addr\n"); | |
1518 | ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, | |
1519 | ISER_HEADERS_LEN, DMA_TO_DEVICE); | |
1520 | tx_desc->dma_addr = 0; | |
1521 | } | |
1522 | } | |
1523 | ||
1524 | static void | |
1525 | isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, | |
1526 | struct ib_device *ib_dev) | |
1527 | { | |
dbbc5d11 NB |
1528 | if (isert_cmd->pdu_buf_dma != 0) { |
1529 | pr_debug("Calling ib_dma_unmap_single for isert_cmd->pdu_buf_dma\n"); | |
1530 | ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, | |
1531 | isert_cmd->pdu_buf_len, DMA_TO_DEVICE); | |
1532 | isert_cmd->pdu_buf_dma = 0; | |
b8d26b3b NB |
1533 | } |
1534 | ||
1535 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
1536 | isert_put_cmd(isert_cmd); | |
1537 | } | |
1538 | ||
1539 | static void | |
1540 | isert_completion_rdma_read(struct iser_tx_desc *tx_desc, | |
1541 | struct isert_cmd *isert_cmd) | |
1542 | { | |
1543 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; | |
d703ce2f | 1544 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b | 1545 | struct se_cmd *se_cmd = &cmd->se_cmd; |
90ecc6e2 | 1546 | struct isert_conn *isert_conn = isert_cmd->conn; |
d40945d8 | 1547 | struct isert_device *device = isert_conn->conn_device; |
b8d26b3b NB |
1548 | |
1549 | iscsit_stop_dataout_timer(cmd); | |
d40945d8 | 1550 | device->unreg_rdma_mem(isert_cmd, isert_conn); |
90ecc6e2 | 1551 | cmd->write_data_done = wr->cur_rdma_length; |
b6b87a1d | 1552 | wr->send_wr_num = 0; |
b8d26b3b | 1553 | |
90ecc6e2 | 1554 | pr_debug("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); |
b8d26b3b NB |
1555 | spin_lock_bh(&cmd->istate_lock); |
1556 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1557 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1558 | spin_unlock_bh(&cmd->istate_lock); | |
1559 | ||
1560 | target_execute_cmd(se_cmd); | |
1561 | } | |
1562 | ||
1563 | static void | |
1564 | isert_do_control_comp(struct work_struct *work) | |
1565 | { | |
1566 | struct isert_cmd *isert_cmd = container_of(work, | |
1567 | struct isert_cmd, comp_work); | |
1568 | struct isert_conn *isert_conn = isert_cmd->conn; | |
1569 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
d703ce2f | 1570 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b NB |
1571 | |
1572 | switch (cmd->i_state) { | |
1573 | case ISTATE_SEND_TASKMGTRSP: | |
1574 | pr_debug("Calling iscsit_tmr_post_handler >>>>>>>>>>>>>>>>>\n"); | |
1575 | ||
1576 | atomic_dec(&isert_conn->post_send_buf_count); | |
1577 | iscsit_tmr_post_handler(cmd, cmd->conn); | |
1578 | ||
1579 | cmd->i_state = ISTATE_SENT_STATUS; | |
1580 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); | |
1581 | break; | |
1582 | case ISTATE_SEND_REJECT: | |
1583 | pr_debug("Got isert_do_control_comp ISTATE_SEND_REJECT: >>>\n"); | |
1584 | atomic_dec(&isert_conn->post_send_buf_count); | |
1585 | ||
1586 | cmd->i_state = ISTATE_SENT_STATUS; | |
b8d26b3b | 1587 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); |
3df8f68a | 1588 | break; |
b8d26b3b NB |
1589 | case ISTATE_SEND_LOGOUTRSP: |
1590 | pr_debug("Calling iscsit_logout_post_handler >>>>>>>>>>>>>>\n"); | |
1591 | /* | |
1592 | * Call atomic_dec(&isert_conn->post_send_buf_count) | |
defd8848 | 1593 | * from isert_wait_conn() |
b8d26b3b NB |
1594 | */ |
1595 | isert_conn->logout_posted = true; | |
1596 | iscsit_logout_post_handler(cmd, cmd->conn); | |
1597 | break; | |
adb54c29 NB |
1598 | case ISTATE_SEND_TEXTRSP: |
1599 | atomic_dec(&isert_conn->post_send_buf_count); | |
1600 | cmd->i_state = ISTATE_SENT_STATUS; | |
1601 | isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); | |
1602 | break; | |
b8d26b3b NB |
1603 | default: |
1604 | pr_err("Unknown do_control_comp i_state %d\n", cmd->i_state); | |
1605 | dump_stack(); | |
1606 | break; | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | static void | |
1611 | isert_response_completion(struct iser_tx_desc *tx_desc, | |
1612 | struct isert_cmd *isert_cmd, | |
1613 | struct isert_conn *isert_conn, | |
1614 | struct ib_device *ib_dev) | |
1615 | { | |
d703ce2f | 1616 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b6b87a1d | 1617 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
b8d26b3b NB |
1618 | |
1619 | if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || | |
3df8f68a | 1620 | cmd->i_state == ISTATE_SEND_LOGOUTRSP || |
adb54c29 NB |
1621 | cmd->i_state == ISTATE_SEND_REJECT || |
1622 | cmd->i_state == ISTATE_SEND_TEXTRSP) { | |
b8d26b3b NB |
1623 | isert_unmap_tx_desc(tx_desc, ib_dev); |
1624 | ||
1625 | INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); | |
1626 | queue_work(isert_comp_wq, &isert_cmd->comp_work); | |
1627 | return; | |
1628 | } | |
b6b87a1d | 1629 | atomic_sub(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); |
b8d26b3b NB |
1630 | |
1631 | cmd->i_state = ISTATE_SENT_STATUS; | |
1632 | isert_completion_put(tx_desc, isert_cmd, ib_dev); | |
1633 | } | |
1634 | ||
1635 | static void | |
95b60f07 NB |
1636 | __isert_send_completion(struct iser_tx_desc *tx_desc, |
1637 | struct isert_conn *isert_conn) | |
b8d26b3b NB |
1638 | { |
1639 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
1640 | struct isert_cmd *isert_cmd = tx_desc->isert_cmd; | |
1641 | struct isert_rdma_wr *wr; | |
1642 | ||
1643 | if (!isert_cmd) { | |
1644 | atomic_dec(&isert_conn->post_send_buf_count); | |
1645 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
1646 | return; | |
1647 | } | |
1648 | wr = &isert_cmd->rdma_wr; | |
1649 | ||
1650 | switch (wr->iser_ib_op) { | |
1651 | case ISER_IB_RECV: | |
1652 | pr_err("isert_send_completion: Got ISER_IB_RECV\n"); | |
1653 | dump_stack(); | |
1654 | break; | |
1655 | case ISER_IB_SEND: | |
1656 | pr_debug("isert_send_completion: Got ISER_IB_SEND\n"); | |
1657 | isert_response_completion(tx_desc, isert_cmd, | |
1658 | isert_conn, ib_dev); | |
1659 | break; | |
1660 | case ISER_IB_RDMA_WRITE: | |
1661 | pr_err("isert_send_completion: Got ISER_IB_RDMA_WRITE\n"); | |
1662 | dump_stack(); | |
1663 | break; | |
1664 | case ISER_IB_RDMA_READ: | |
1665 | pr_debug("isert_send_completion: Got ISER_IB_RDMA_READ:\n"); | |
1666 | ||
b6b87a1d | 1667 | atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); |
b8d26b3b NB |
1668 | isert_completion_rdma_read(tx_desc, isert_cmd); |
1669 | break; | |
1670 | default: | |
1671 | pr_err("Unknown wr->iser_ib_op: 0x%02x\n", wr->iser_ib_op); | |
1672 | dump_stack(); | |
1673 | break; | |
1674 | } | |
1675 | } | |
1676 | ||
95b60f07 NB |
1677 | static void |
1678 | isert_send_completion(struct iser_tx_desc *tx_desc, | |
1679 | struct isert_conn *isert_conn) | |
1680 | { | |
1681 | struct llist_node *llnode = tx_desc->comp_llnode_batch; | |
1682 | struct iser_tx_desc *t; | |
1683 | /* | |
1684 | * Drain coalesced completion llist starting from comp_llnode_batch | |
1685 | * setup in isert_init_send_wr(), and then complete trailing tx_desc. | |
1686 | */ | |
1687 | while (llnode) { | |
1688 | t = llist_entry(llnode, struct iser_tx_desc, comp_llnode); | |
1689 | llnode = llist_next(llnode); | |
1690 | __isert_send_completion(t, isert_conn); | |
1691 | } | |
1692 | __isert_send_completion(tx_desc, isert_conn); | |
1693 | } | |
1694 | ||
ebbe4421 NB |
1695 | static void |
1696 | isert_cq_drain_comp_llist(struct isert_conn *isert_conn, struct ib_device *ib_dev) | |
1697 | { | |
1698 | struct llist_node *llnode; | |
1699 | struct isert_rdma_wr *wr; | |
1700 | struct iser_tx_desc *t; | |
1701 | ||
1702 | mutex_lock(&isert_conn->conn_mutex); | |
1703 | llnode = llist_del_all(&isert_conn->conn_comp_llist); | |
1704 | isert_conn->conn_comp_batch = 0; | |
1705 | mutex_unlock(&isert_conn->conn_mutex); | |
1706 | ||
1707 | while (llnode) { | |
1708 | t = llist_entry(llnode, struct iser_tx_desc, comp_llnode); | |
1709 | llnode = llist_next(llnode); | |
1710 | wr = &t->isert_cmd->rdma_wr; | |
1711 | ||
1712 | atomic_sub(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); | |
1713 | isert_completion_put(t, t->isert_cmd, ib_dev); | |
1714 | } | |
1715 | } | |
1716 | ||
b8d26b3b | 1717 | static void |
defd8848 | 1718 | isert_cq_tx_comp_err(struct iser_tx_desc *tx_desc, struct isert_conn *isert_conn) |
b8d26b3b NB |
1719 | { |
1720 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
defd8848 | 1721 | struct isert_cmd *isert_cmd = tx_desc->isert_cmd; |
ebbe4421 NB |
1722 | struct llist_node *llnode = tx_desc->comp_llnode_batch; |
1723 | struct isert_rdma_wr *wr; | |
1724 | struct iser_tx_desc *t; | |
1725 | ||
1726 | while (llnode) { | |
1727 | t = llist_entry(llnode, struct iser_tx_desc, comp_llnode); | |
1728 | llnode = llist_next(llnode); | |
1729 | wr = &t->isert_cmd->rdma_wr; | |
1730 | ||
1731 | atomic_sub(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); | |
1732 | isert_completion_put(t, t->isert_cmd, ib_dev); | |
1733 | } | |
1734 | tx_desc->comp_llnode_batch = NULL; | |
defd8848 NB |
1735 | |
1736 | if (!isert_cmd) | |
1737 | isert_unmap_tx_desc(tx_desc, ib_dev); | |
1738 | else | |
1739 | isert_completion_put(tx_desc, isert_cmd, ib_dev); | |
1740 | } | |
1741 | ||
1742 | static void | |
1743 | isert_cq_rx_comp_err(struct isert_conn *isert_conn) | |
1744 | { | |
1745 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
1746 | struct iscsi_conn *conn = isert_conn->conn; | |
b8d26b3b | 1747 | |
defd8848 NB |
1748 | if (isert_conn->post_recv_buf_count) |
1749 | return; | |
b8d26b3b | 1750 | |
ebbe4421 NB |
1751 | isert_cq_drain_comp_llist(isert_conn, ib_dev); |
1752 | ||
defd8848 NB |
1753 | if (conn->sess) { |
1754 | target_sess_cmd_list_set_waiting(conn->sess->se_sess); | |
1755 | target_wait_for_sess_cmds(conn->sess->se_sess); | |
b8d26b3b NB |
1756 | } |
1757 | ||
defd8848 NB |
1758 | while (atomic_read(&isert_conn->post_send_buf_count)) |
1759 | msleep(3000); | |
b8d26b3b | 1760 | |
defd8848 NB |
1761 | mutex_lock(&isert_conn->conn_mutex); |
1762 | isert_conn->state = ISER_CONN_DOWN; | |
1763 | mutex_unlock(&isert_conn->conn_mutex); | |
b2cb9649 | 1764 | |
defd8848 | 1765 | complete(&isert_conn->conn_wait_comp_err); |
b8d26b3b NB |
1766 | } |
1767 | ||
1768 | static void | |
1769 | isert_cq_tx_work(struct work_struct *work) | |
1770 | { | |
1771 | struct isert_cq_desc *cq_desc = container_of(work, | |
1772 | struct isert_cq_desc, cq_tx_work); | |
1773 | struct isert_device *device = cq_desc->device; | |
1774 | int cq_index = cq_desc->cq_index; | |
1775 | struct ib_cq *tx_cq = device->dev_tx_cq[cq_index]; | |
1776 | struct isert_conn *isert_conn; | |
1777 | struct iser_tx_desc *tx_desc; | |
1778 | struct ib_wc wc; | |
1779 | ||
1780 | while (ib_poll_cq(tx_cq, 1, &wc) == 1) { | |
1781 | tx_desc = (struct iser_tx_desc *)(unsigned long)wc.wr_id; | |
1782 | isert_conn = wc.qp->qp_context; | |
1783 | ||
1784 | if (wc.status == IB_WC_SUCCESS) { | |
1785 | isert_send_completion(tx_desc, isert_conn); | |
1786 | } else { | |
1787 | pr_debug("TX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n"); | |
1788 | pr_debug("TX wc.status: 0x%08x\n", wc.status); | |
c5a2adbf | 1789 | pr_debug("TX wc.vendor_err: 0x%08x\n", wc.vendor_err); |
defd8848 | 1790 | |
9bb4ca68 | 1791 | if (wc.wr_id != ISER_FASTREG_LI_WRID) { |
ebbe4421 NB |
1792 | if (tx_desc->llnode_active) |
1793 | continue; | |
1794 | ||
9bb4ca68 NB |
1795 | atomic_dec(&isert_conn->post_send_buf_count); |
1796 | isert_cq_tx_comp_err(tx_desc, isert_conn); | |
1797 | } | |
b8d26b3b NB |
1798 | } |
1799 | } | |
1800 | ||
1801 | ib_req_notify_cq(tx_cq, IB_CQ_NEXT_COMP); | |
1802 | } | |
1803 | ||
1804 | static void | |
1805 | isert_cq_tx_callback(struct ib_cq *cq, void *context) | |
1806 | { | |
1807 | struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context; | |
1808 | ||
b8d26b3b NB |
1809 | queue_work(isert_comp_wq, &cq_desc->cq_tx_work); |
1810 | } | |
1811 | ||
1812 | static void | |
1813 | isert_cq_rx_work(struct work_struct *work) | |
1814 | { | |
1815 | struct isert_cq_desc *cq_desc = container_of(work, | |
1816 | struct isert_cq_desc, cq_rx_work); | |
1817 | struct isert_device *device = cq_desc->device; | |
1818 | int cq_index = cq_desc->cq_index; | |
1819 | struct ib_cq *rx_cq = device->dev_rx_cq[cq_index]; | |
1820 | struct isert_conn *isert_conn; | |
1821 | struct iser_rx_desc *rx_desc; | |
1822 | struct ib_wc wc; | |
1823 | unsigned long xfer_len; | |
1824 | ||
1825 | while (ib_poll_cq(rx_cq, 1, &wc) == 1) { | |
1826 | rx_desc = (struct iser_rx_desc *)(unsigned long)wc.wr_id; | |
1827 | isert_conn = wc.qp->qp_context; | |
1828 | ||
1829 | if (wc.status == IB_WC_SUCCESS) { | |
1830 | xfer_len = (unsigned long)wc.byte_len; | |
1831 | isert_rx_completion(rx_desc, isert_conn, xfer_len); | |
1832 | } else { | |
1833 | pr_debug("RX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n"); | |
c5a2adbf | 1834 | if (wc.status != IB_WC_WR_FLUSH_ERR) { |
b8d26b3b | 1835 | pr_debug("RX wc.status: 0x%08x\n", wc.status); |
c5a2adbf NB |
1836 | pr_debug("RX wc.vendor_err: 0x%08x\n", |
1837 | wc.vendor_err); | |
1838 | } | |
b8d26b3b | 1839 | isert_conn->post_recv_buf_count--; |
defd8848 | 1840 | isert_cq_rx_comp_err(isert_conn); |
b8d26b3b NB |
1841 | } |
1842 | } | |
1843 | ||
1844 | ib_req_notify_cq(rx_cq, IB_CQ_NEXT_COMP); | |
1845 | } | |
1846 | ||
1847 | static void | |
1848 | isert_cq_rx_callback(struct ib_cq *cq, void *context) | |
1849 | { | |
1850 | struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context; | |
1851 | ||
b8d26b3b NB |
1852 | queue_work(isert_rx_wq, &cq_desc->cq_rx_work); |
1853 | } | |
1854 | ||
1855 | static int | |
1856 | isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) | |
1857 | { | |
1858 | struct ib_send_wr *wr_failed; | |
1859 | int ret; | |
1860 | ||
1861 | atomic_inc(&isert_conn->post_send_buf_count); | |
1862 | ||
1863 | ret = ib_post_send(isert_conn->conn_qp, &isert_cmd->tx_desc.send_wr, | |
1864 | &wr_failed); | |
1865 | if (ret) { | |
1866 | pr_err("ib_post_send failed with %d\n", ret); | |
1867 | atomic_dec(&isert_conn->post_send_buf_count); | |
1868 | return ret; | |
1869 | } | |
1870 | return ret; | |
1871 | } | |
1872 | ||
1873 | static int | |
1874 | isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
1875 | { | |
d703ce2f | 1876 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1877 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; |
1878 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; | |
1879 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) | |
1880 | &isert_cmd->tx_desc.iscsi_header; | |
1881 | ||
1882 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1883 | iscsit_build_rsp_pdu(cmd, conn, true, hdr); | |
1884 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
1885 | /* | |
1886 | * Attach SENSE DATA payload to iSCSI Response PDU | |
1887 | */ | |
1888 | if (cmd->se_cmd.sense_buffer && | |
1889 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
1890 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
1891 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
1892 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; | |
dbbc5d11 | 1893 | u32 padding, pdu_len; |
b8d26b3b NB |
1894 | |
1895 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, | |
1896 | cmd->sense_buffer); | |
1897 | cmd->se_cmd.scsi_sense_length += sizeof(__be16); | |
1898 | ||
1899 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
1900 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); | |
dbbc5d11 | 1901 | pdu_len = cmd->se_cmd.scsi_sense_length + padding; |
b8d26b3b | 1902 | |
dbbc5d11 NB |
1903 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
1904 | (void *)cmd->sense_buffer, pdu_len, | |
b8d26b3b NB |
1905 | DMA_TO_DEVICE); |
1906 | ||
dbbc5d11 NB |
1907 | isert_cmd->pdu_buf_len = pdu_len; |
1908 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
1909 | tx_dsg->length = pdu_len; | |
b8d26b3b NB |
1910 | tx_dsg->lkey = isert_conn->conn_mr->lkey; |
1911 | isert_cmd->tx_desc.num_sge = 2; | |
1912 | } | |
1913 | ||
95b60f07 | 1914 | isert_init_send_wr(isert_conn, isert_cmd, send_wr, true); |
b8d26b3b NB |
1915 | |
1916 | pr_debug("Posting SCSI Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); | |
1917 | ||
1918 | return isert_post_response(isert_conn, isert_cmd); | |
1919 | } | |
1920 | ||
1921 | static int | |
1922 | isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
1923 | bool nopout_response) | |
1924 | { | |
d703ce2f | 1925 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1926 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; |
1927 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; | |
1928 | ||
1929 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1930 | iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) | |
1931 | &isert_cmd->tx_desc.iscsi_header, | |
1932 | nopout_response); | |
1933 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
95b60f07 | 1934 | isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); |
b8d26b3b | 1935 | |
8b513d0c | 1936 | pr_debug("Posting NOPIN Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); |
b8d26b3b NB |
1937 | |
1938 | return isert_post_response(isert_conn, isert_cmd); | |
1939 | } | |
1940 | ||
1941 | static int | |
1942 | isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1943 | { | |
d703ce2f | 1944 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1945 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; |
1946 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; | |
1947 | ||
1948 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1949 | iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) | |
1950 | &isert_cmd->tx_desc.iscsi_header); | |
1951 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
95b60f07 | 1952 | isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); |
b8d26b3b NB |
1953 | |
1954 | pr_debug("Posting Logout Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); | |
1955 | ||
1956 | return isert_post_response(isert_conn, isert_cmd); | |
1957 | } | |
1958 | ||
1959 | static int | |
1960 | isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1961 | { | |
d703ce2f | 1962 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1963 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; |
1964 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; | |
1965 | ||
1966 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
1967 | iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) | |
1968 | &isert_cmd->tx_desc.iscsi_header); | |
1969 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
95b60f07 | 1970 | isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); |
b8d26b3b NB |
1971 | |
1972 | pr_debug("Posting Task Management Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); | |
1973 | ||
1974 | return isert_post_response(isert_conn, isert_cmd); | |
1975 | } | |
1976 | ||
1977 | static int | |
1978 | isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1979 | { | |
d703ce2f | 1980 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
1981 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; |
1982 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; | |
3df8f68a NB |
1983 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; |
1984 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; | |
1985 | struct iscsi_reject *hdr = | |
1986 | (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; | |
b8d26b3b NB |
1987 | |
1988 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
3df8f68a | 1989 | iscsit_build_reject(cmd, conn, hdr); |
b8d26b3b | 1990 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); |
3df8f68a NB |
1991 | |
1992 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
dbbc5d11 | 1993 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, |
3df8f68a NB |
1994 | (void *)cmd->buf_ptr, ISCSI_HDR_LEN, |
1995 | DMA_TO_DEVICE); | |
dbbc5d11 NB |
1996 | isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; |
1997 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
3df8f68a NB |
1998 | tx_dsg->length = ISCSI_HDR_LEN; |
1999 | tx_dsg->lkey = isert_conn->conn_mr->lkey; | |
2000 | isert_cmd->tx_desc.num_sge = 2; | |
2001 | ||
95b60f07 | 2002 | isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); |
b8d26b3b NB |
2003 | |
2004 | pr_debug("Posting Reject IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); | |
2005 | ||
2006 | return isert_post_response(isert_conn, isert_cmd); | |
2007 | } | |
2008 | ||
adb54c29 NB |
2009 | static int |
2010 | isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2011 | { | |
d703ce2f | 2012 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
adb54c29 NB |
2013 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; |
2014 | struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; | |
2015 | struct iscsi_text_rsp *hdr = | |
2016 | (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; | |
2017 | u32 txt_rsp_len; | |
2018 | int rc; | |
2019 | ||
2020 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
2021 | rc = iscsit_build_text_rsp(cmd, conn, hdr); | |
2022 | if (rc < 0) | |
2023 | return rc; | |
2024 | ||
2025 | txt_rsp_len = rc; | |
2026 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
2027 | ||
2028 | if (txt_rsp_len) { | |
2029 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
2030 | struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; | |
2031 | void *txt_rsp_buf = cmd->buf_ptr; | |
2032 | ||
2033 | isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, | |
2034 | txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); | |
2035 | ||
2036 | isert_cmd->pdu_buf_len = txt_rsp_len; | |
2037 | tx_dsg->addr = isert_cmd->pdu_buf_dma; | |
2038 | tx_dsg->length = txt_rsp_len; | |
2039 | tx_dsg->lkey = isert_conn->conn_mr->lkey; | |
2040 | isert_cmd->tx_desc.num_sge = 2; | |
2041 | } | |
95b60f07 | 2042 | isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); |
adb54c29 NB |
2043 | |
2044 | pr_debug("Posting Text Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); | |
2045 | ||
2046 | return isert_post_response(isert_conn, isert_cmd); | |
2047 | } | |
2048 | ||
b8d26b3b NB |
2049 | static int |
2050 | isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, | |
2051 | struct ib_sge *ib_sge, struct ib_send_wr *send_wr, | |
2052 | u32 data_left, u32 offset) | |
2053 | { | |
d703ce2f | 2054 | struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; |
b8d26b3b NB |
2055 | struct scatterlist *sg_start, *tmp_sg; |
2056 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
2057 | u32 sg_off, page_off; | |
2058 | int i = 0, sg_nents; | |
2059 | ||
2060 | sg_off = offset / PAGE_SIZE; | |
2061 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
2062 | sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); | |
2063 | page_off = offset % PAGE_SIZE; | |
2064 | ||
2065 | send_wr->sg_list = ib_sge; | |
2066 | send_wr->num_sge = sg_nents; | |
2067 | send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc; | |
2068 | /* | |
2069 | * Perform mapping of TCM scatterlist memory ib_sge dma_addr. | |
2070 | */ | |
2071 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
2072 | pr_debug("ISER RDMA from SGL dma_addr: 0x%16llx dma_len: %u, page_off: %u\n", | |
2073 | (unsigned long long)tmp_sg->dma_address, | |
2074 | tmp_sg->length, page_off); | |
2075 | ||
2076 | ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; | |
2077 | ib_sge->length = min_t(u32, data_left, | |
2078 | ib_sg_dma_len(ib_dev, tmp_sg) - page_off); | |
2079 | ib_sge->lkey = isert_conn->conn_mr->lkey; | |
2080 | ||
90ecc6e2 VP |
2081 | pr_debug("RDMA ib_sge: addr: 0x%16llx length: %u lkey: %08x\n", |
2082 | ib_sge->addr, ib_sge->length, ib_sge->lkey); | |
b8d26b3b NB |
2083 | page_off = 0; |
2084 | data_left -= ib_sge->length; | |
2085 | ib_sge++; | |
2086 | pr_debug("Incrementing ib_sge pointer to %p\n", ib_sge); | |
2087 | } | |
2088 | ||
2089 | pr_debug("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", | |
2090 | send_wr->sg_list, send_wr->num_sge); | |
2091 | ||
2092 | return sg_nents; | |
2093 | } | |
2094 | ||
2095 | static int | |
90ecc6e2 VP |
2096 | isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2097 | struct isert_rdma_wr *wr) | |
b8d26b3b NB |
2098 | { |
2099 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2100 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b | 2101 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; |
b8d26b3b | 2102 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; |
90ecc6e2 | 2103 | struct ib_send_wr *send_wr; |
b8d26b3b | 2104 | struct ib_sge *ib_sge; |
90ecc6e2 VP |
2105 | struct scatterlist *sg_start; |
2106 | u32 sg_off = 0, sg_nents; | |
2107 | u32 offset = 0, data_len, data_left, rdma_write_max, va_offset = 0; | |
2108 | int ret = 0, count, i, ib_sge_cnt; | |
2109 | ||
2110 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { | |
2111 | data_left = se_cmd->data_length; | |
90ecc6e2 VP |
2112 | } else { |
2113 | sg_off = cmd->write_data_done / PAGE_SIZE; | |
2114 | data_left = se_cmd->data_length - cmd->write_data_done; | |
2115 | offset = cmd->write_data_done; | |
2116 | isert_cmd->tx_desc.isert_cmd = isert_cmd; | |
2117 | } | |
b8d26b3b | 2118 | |
90ecc6e2 VP |
2119 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; |
2120 | sg_nents = se_cmd->t_data_nents - sg_off; | |
b8d26b3b | 2121 | |
90ecc6e2 VP |
2122 | count = ib_dma_map_sg(ib_dev, sg_start, sg_nents, |
2123 | (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? | |
2124 | DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
b8d26b3b | 2125 | if (unlikely(!count)) { |
90ecc6e2 | 2126 | pr_err("Cmd: %p unrable to map SGs\n", isert_cmd); |
b8d26b3b NB |
2127 | return -EINVAL; |
2128 | } | |
90ecc6e2 | 2129 | wr->sge = sg_start; |
b8d26b3b | 2130 | wr->num_sge = sg_nents; |
90ecc6e2 VP |
2131 | wr->cur_rdma_length = data_left; |
2132 | pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", | |
2133 | isert_cmd, count, sg_start, sg_nents, data_left); | |
b8d26b3b NB |
2134 | |
2135 | ib_sge = kzalloc(sizeof(struct ib_sge) * sg_nents, GFP_KERNEL); | |
2136 | if (!ib_sge) { | |
90ecc6e2 | 2137 | pr_warn("Unable to allocate ib_sge\n"); |
b8d26b3b NB |
2138 | ret = -ENOMEM; |
2139 | goto unmap_sg; | |
2140 | } | |
90ecc6e2 | 2141 | wr->ib_sge = ib_sge; |
b8d26b3b NB |
2142 | |
2143 | wr->send_wr_num = DIV_ROUND_UP(sg_nents, isert_conn->max_sge); | |
2144 | wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num, | |
2145 | GFP_KERNEL); | |
2146 | if (!wr->send_wr) { | |
90ecc6e2 | 2147 | pr_debug("Unable to allocate wr->send_wr\n"); |
b8d26b3b NB |
2148 | ret = -ENOMEM; |
2149 | goto unmap_sg; | |
2150 | } | |
b8d26b3b NB |
2151 | |
2152 | wr->isert_cmd = isert_cmd; | |
2153 | rdma_write_max = isert_conn->max_sge * PAGE_SIZE; | |
b8d26b3b NB |
2154 | |
2155 | for (i = 0; i < wr->send_wr_num; i++) { | |
2156 | send_wr = &isert_cmd->rdma_wr.send_wr[i]; | |
2157 | data_len = min(data_left, rdma_write_max); | |
2158 | ||
b8d26b3b | 2159 | send_wr->send_flags = 0; |
90ecc6e2 VP |
2160 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { |
2161 | send_wr->opcode = IB_WR_RDMA_WRITE; | |
2162 | send_wr->wr.rdma.remote_addr = isert_cmd->read_va + offset; | |
2163 | send_wr->wr.rdma.rkey = isert_cmd->read_stag; | |
2164 | if (i + 1 == wr->send_wr_num) | |
2165 | send_wr->next = &isert_cmd->tx_desc.send_wr; | |
2166 | else | |
2167 | send_wr->next = &wr->send_wr[i + 1]; | |
2168 | } else { | |
2169 | send_wr->opcode = IB_WR_RDMA_READ; | |
2170 | send_wr->wr.rdma.remote_addr = isert_cmd->write_va + va_offset; | |
2171 | send_wr->wr.rdma.rkey = isert_cmd->write_stag; | |
2172 | if (i + 1 == wr->send_wr_num) | |
2173 | send_wr->send_flags = IB_SEND_SIGNALED; | |
2174 | else | |
2175 | send_wr->next = &wr->send_wr[i + 1]; | |
2176 | } | |
b8d26b3b NB |
2177 | |
2178 | ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, | |
2179 | send_wr, data_len, offset); | |
2180 | ib_sge += ib_sge_cnt; | |
2181 | ||
b8d26b3b | 2182 | offset += data_len; |
90ecc6e2 | 2183 | va_offset += data_len; |
b8d26b3b NB |
2184 | data_left -= data_len; |
2185 | } | |
90ecc6e2 VP |
2186 | |
2187 | return 0; | |
2188 | unmap_sg: | |
2189 | ib_dma_unmap_sg(ib_dev, sg_start, sg_nents, | |
2190 | (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? | |
2191 | DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
2192 | return ret; | |
2193 | } | |
2194 | ||
59464ef4 VP |
2195 | static int |
2196 | isert_map_fr_pagelist(struct ib_device *ib_dev, | |
2197 | struct scatterlist *sg_start, int sg_nents, u64 *fr_pl) | |
2198 | { | |
2199 | u64 start_addr, end_addr, page, chunk_start = 0; | |
2200 | struct scatterlist *tmp_sg; | |
2201 | int i = 0, new_chunk, last_ent, n_pages; | |
2202 | ||
2203 | n_pages = 0; | |
2204 | new_chunk = 1; | |
2205 | last_ent = sg_nents - 1; | |
2206 | for_each_sg(sg_start, tmp_sg, sg_nents, i) { | |
2207 | start_addr = ib_sg_dma_address(ib_dev, tmp_sg); | |
2208 | if (new_chunk) | |
2209 | chunk_start = start_addr; | |
2210 | end_addr = start_addr + ib_sg_dma_len(ib_dev, tmp_sg); | |
2211 | ||
2212 | pr_debug("SGL[%d] dma_addr: 0x%16llx len: %u\n", | |
2213 | i, (unsigned long long)tmp_sg->dma_address, | |
2214 | tmp_sg->length); | |
2215 | ||
2216 | if ((end_addr & ~PAGE_MASK) && i < last_ent) { | |
2217 | new_chunk = 0; | |
2218 | continue; | |
2219 | } | |
2220 | new_chunk = 1; | |
2221 | ||
2222 | page = chunk_start & PAGE_MASK; | |
2223 | do { | |
2224 | fr_pl[n_pages++] = page; | |
2225 | pr_debug("Mapped page_list[%d] page_addr: 0x%16llx\n", | |
2226 | n_pages - 1, page); | |
2227 | page += PAGE_SIZE; | |
2228 | } while (page < end_addr); | |
2229 | } | |
2230 | ||
2231 | return n_pages; | |
2232 | } | |
2233 | ||
2234 | static int | |
2235 | isert_fast_reg_mr(struct fast_reg_descriptor *fr_desc, | |
9bd626e7 SG |
2236 | struct isert_conn *isert_conn, struct scatterlist *sg_start, |
2237 | struct ib_sge *ib_sge, u32 sg_nents, u32 offset, | |
2238 | unsigned int data_len) | |
59464ef4 | 2239 | { |
59464ef4 | 2240 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; |
59464ef4 VP |
2241 | struct ib_send_wr fr_wr, inv_wr; |
2242 | struct ib_send_wr *bad_wr, *wr = NULL; | |
9bd626e7 SG |
2243 | int ret, pagelist_len; |
2244 | u32 page_off; | |
59464ef4 | 2245 | u8 key; |
59464ef4 | 2246 | |
9bd626e7 | 2247 | sg_nents = min_t(unsigned int, sg_nents, ISCSI_ISER_SG_TABLESIZE); |
59464ef4 VP |
2248 | page_off = offset % PAGE_SIZE; |
2249 | ||
9bd626e7 SG |
2250 | pr_debug("Use fr_desc %p sg_nents %d offset %u\n", |
2251 | fr_desc, sg_nents, offset); | |
59464ef4 VP |
2252 | |
2253 | pagelist_len = isert_map_fr_pagelist(ib_dev, sg_start, sg_nents, | |
2254 | &fr_desc->data_frpl->page_list[0]); | |
2255 | ||
2256 | if (!fr_desc->valid) { | |
2257 | memset(&inv_wr, 0, sizeof(inv_wr)); | |
9bb4ca68 | 2258 | inv_wr.wr_id = ISER_FASTREG_LI_WRID; |
59464ef4 VP |
2259 | inv_wr.opcode = IB_WR_LOCAL_INV; |
2260 | inv_wr.ex.invalidate_rkey = fr_desc->data_mr->rkey; | |
2261 | wr = &inv_wr; | |
2262 | /* Bump the key */ | |
2263 | key = (u8)(fr_desc->data_mr->rkey & 0x000000FF); | |
2264 | ib_update_fast_reg_key(fr_desc->data_mr, ++key); | |
2265 | } | |
2266 | ||
2267 | /* Prepare FASTREG WR */ | |
2268 | memset(&fr_wr, 0, sizeof(fr_wr)); | |
9bb4ca68 | 2269 | fr_wr.wr_id = ISER_FASTREG_LI_WRID; |
59464ef4 VP |
2270 | fr_wr.opcode = IB_WR_FAST_REG_MR; |
2271 | fr_wr.wr.fast_reg.iova_start = | |
2272 | fr_desc->data_frpl->page_list[0] + page_off; | |
2273 | fr_wr.wr.fast_reg.page_list = fr_desc->data_frpl; | |
2274 | fr_wr.wr.fast_reg.page_list_len = pagelist_len; | |
2275 | fr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; | |
2276 | fr_wr.wr.fast_reg.length = data_len; | |
2277 | fr_wr.wr.fast_reg.rkey = fr_desc->data_mr->rkey; | |
2278 | fr_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE; | |
2279 | ||
2280 | if (!wr) | |
2281 | wr = &fr_wr; | |
2282 | else | |
2283 | wr->next = &fr_wr; | |
2284 | ||
2285 | ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr); | |
2286 | if (ret) { | |
2287 | pr_err("fast registration failed, ret:%d\n", ret); | |
2288 | return ret; | |
2289 | } | |
2290 | fr_desc->valid = false; | |
2291 | ||
2292 | ib_sge->lkey = fr_desc->data_mr->lkey; | |
2293 | ib_sge->addr = fr_desc->data_frpl->page_list[0] + page_off; | |
2294 | ib_sge->length = data_len; | |
2295 | ||
2296 | pr_debug("RDMA ib_sge: addr: 0x%16llx length: %u lkey: %08x\n", | |
2297 | ib_sge->addr, ib_sge->length, ib_sge->lkey); | |
2298 | ||
2299 | return ret; | |
2300 | } | |
2301 | ||
2302 | static int | |
a3a5a826 SG |
2303 | isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
2304 | struct isert_rdma_wr *wr) | |
59464ef4 VP |
2305 | { |
2306 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
2307 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); | |
2308 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; | |
2309 | struct ib_device *ib_dev = isert_conn->conn_cm_id->device; | |
2310 | struct ib_send_wr *send_wr; | |
2311 | struct ib_sge *ib_sge; | |
2312 | struct scatterlist *sg_start; | |
2313 | struct fast_reg_descriptor *fr_desc; | |
2314 | u32 sg_off = 0, sg_nents; | |
2315 | u32 offset = 0, data_len, data_left, rdma_write_max; | |
2316 | int ret = 0, count; | |
2317 | unsigned long flags; | |
2318 | ||
2319 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { | |
2320 | data_left = se_cmd->data_length; | |
59464ef4 | 2321 | } else { |
59464ef4 | 2322 | offset = cmd->write_data_done; |
9bd626e7 SG |
2323 | sg_off = offset / PAGE_SIZE; |
2324 | data_left = se_cmd->data_length - cmd->write_data_done; | |
59464ef4 VP |
2325 | isert_cmd->tx_desc.isert_cmd = isert_cmd; |
2326 | } | |
2327 | ||
2328 | sg_start = &cmd->se_cmd.t_data_sg[sg_off]; | |
2329 | sg_nents = se_cmd->t_data_nents - sg_off; | |
2330 | ||
2331 | count = ib_dma_map_sg(ib_dev, sg_start, sg_nents, | |
2332 | (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? | |
2333 | DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
2334 | if (unlikely(!count)) { | |
2335 | pr_err("Cmd: %p unrable to map SGs\n", isert_cmd); | |
2336 | return -EINVAL; | |
2337 | } | |
2338 | wr->sge = sg_start; | |
2339 | wr->num_sge = sg_nents; | |
2340 | pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", | |
2341 | isert_cmd, count, sg_start, sg_nents, data_left); | |
2342 | ||
2343 | memset(&wr->s_ib_sge, 0, sizeof(*ib_sge)); | |
2344 | ib_sge = &wr->s_ib_sge; | |
2345 | wr->ib_sge = ib_sge; | |
2346 | ||
2347 | wr->send_wr_num = 1; | |
2348 | memset(&wr->s_send_wr, 0, sizeof(*send_wr)); | |
2349 | wr->send_wr = &wr->s_send_wr; | |
2350 | ||
2351 | wr->isert_cmd = isert_cmd; | |
2352 | rdma_write_max = ISCSI_ISER_SG_TABLESIZE * PAGE_SIZE; | |
2353 | ||
2354 | send_wr = &isert_cmd->rdma_wr.s_send_wr; | |
2355 | send_wr->sg_list = ib_sge; | |
2356 | send_wr->num_sge = 1; | |
2357 | send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc; | |
2358 | if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { | |
2359 | send_wr->opcode = IB_WR_RDMA_WRITE; | |
2360 | send_wr->wr.rdma.remote_addr = isert_cmd->read_va; | |
2361 | send_wr->wr.rdma.rkey = isert_cmd->read_stag; | |
2362 | send_wr->send_flags = 0; | |
2363 | send_wr->next = &isert_cmd->tx_desc.send_wr; | |
2364 | } else { | |
2365 | send_wr->opcode = IB_WR_RDMA_READ; | |
2366 | send_wr->wr.rdma.remote_addr = isert_cmd->write_va; | |
2367 | send_wr->wr.rdma.rkey = isert_cmd->write_stag; | |
2368 | send_wr->send_flags = IB_SEND_SIGNALED; | |
2369 | } | |
2370 | ||
2371 | data_len = min(data_left, rdma_write_max); | |
2372 | wr->cur_rdma_length = data_len; | |
2373 | ||
f01b9f73 VP |
2374 | /* if there is a single dma entry, dma mr is sufficient */ |
2375 | if (count == 1) { | |
2376 | ib_sge->addr = ib_sg_dma_address(ib_dev, &sg_start[0]); | |
2377 | ib_sge->length = ib_sg_dma_len(ib_dev, &sg_start[0]); | |
2378 | ib_sge->lkey = isert_conn->conn_mr->lkey; | |
2379 | wr->fr_desc = NULL; | |
2380 | } else { | |
2381 | spin_lock_irqsave(&isert_conn->conn_lock, flags); | |
a3a5a826 | 2382 | fr_desc = list_first_entry(&isert_conn->conn_fr_pool, |
f01b9f73 VP |
2383 | struct fast_reg_descriptor, list); |
2384 | list_del(&fr_desc->list); | |
2385 | spin_unlock_irqrestore(&isert_conn->conn_lock, flags); | |
2386 | wr->fr_desc = fr_desc; | |
59464ef4 | 2387 | |
9bd626e7 SG |
2388 | ret = isert_fast_reg_mr(fr_desc, isert_conn, sg_start, |
2389 | ib_sge, sg_nents, offset, data_len); | |
f01b9f73 | 2390 | if (ret) { |
a3a5a826 | 2391 | list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); |
f01b9f73 VP |
2392 | goto unmap_sg; |
2393 | } | |
59464ef4 VP |
2394 | } |
2395 | ||
2396 | return 0; | |
2397 | ||
2398 | unmap_sg: | |
2399 | ib_dma_unmap_sg(ib_dev, sg_start, sg_nents, | |
2400 | (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? | |
2401 | DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
2402 | return ret; | |
2403 | } | |
2404 | ||
90ecc6e2 VP |
2405 | static int |
2406 | isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
2407 | { | |
2408 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
59464ef4 | 2409 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
90ecc6e2 VP |
2410 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
2411 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; | |
d40945d8 | 2412 | struct isert_device *device = isert_conn->conn_device; |
90ecc6e2 VP |
2413 | struct ib_send_wr *wr_failed; |
2414 | int rc; | |
2415 | ||
2416 | pr_debug("Cmd: %p RDMA_WRITE data_length: %u\n", | |
2417 | isert_cmd, se_cmd->data_length); | |
2418 | wr->iser_ib_op = ISER_IB_RDMA_WRITE; | |
d40945d8 | 2419 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 VP |
2420 | if (rc) { |
2421 | pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); | |
2422 | return rc; | |
2423 | } | |
2424 | ||
b8d26b3b NB |
2425 | /* |
2426 | * Build isert_conn->tx_desc for iSCSI response PDU and attach | |
2427 | */ | |
2428 | isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); | |
04d9cd12 | 2429 | iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) |
b8d26b3b NB |
2430 | &isert_cmd->tx_desc.iscsi_header); |
2431 | isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); | |
95b60f07 NB |
2432 | isert_init_send_wr(isert_conn, isert_cmd, |
2433 | &isert_cmd->tx_desc.send_wr, true); | |
b8d26b3b | 2434 | |
b6b87a1d | 2435 | atomic_add(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); |
b8d26b3b NB |
2436 | |
2437 | rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); | |
2438 | if (rc) { | |
2439 | pr_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); | |
b6b87a1d | 2440 | atomic_sub(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); |
b8d26b3b | 2441 | } |
90ecc6e2 VP |
2442 | pr_debug("Cmd: %p posted RDMA_WRITE + Response for iSER Data READ\n", |
2443 | isert_cmd); | |
b8d26b3b | 2444 | |
90ecc6e2 | 2445 | return 1; |
b8d26b3b NB |
2446 | } |
2447 | ||
2448 | static int | |
2449 | isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) | |
2450 | { | |
2451 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
d703ce2f | 2452 | struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); |
b8d26b3b NB |
2453 | struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; |
2454 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; | |
d40945d8 | 2455 | struct isert_device *device = isert_conn->conn_device; |
90ecc6e2 VP |
2456 | struct ib_send_wr *wr_failed; |
2457 | int rc; | |
b8d26b3b | 2458 | |
90ecc6e2 VP |
2459 | pr_debug("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", |
2460 | isert_cmd, se_cmd->data_length, cmd->write_data_done); | |
b8d26b3b | 2461 | wr->iser_ib_op = ISER_IB_RDMA_READ; |
d40945d8 | 2462 | rc = device->reg_rdma_mem(conn, cmd, wr); |
90ecc6e2 VP |
2463 | if (rc) { |
2464 | pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); | |
2465 | return rc; | |
b8d26b3b NB |
2466 | } |
2467 | ||
b6b87a1d | 2468 | atomic_add(wr->send_wr_num, &isert_conn->post_send_buf_count); |
b8d26b3b NB |
2469 | |
2470 | rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); | |
2471 | if (rc) { | |
2472 | pr_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); | |
b6b87a1d | 2473 | atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); |
b8d26b3b | 2474 | } |
90ecc6e2 VP |
2475 | pr_debug("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", |
2476 | isert_cmd); | |
b8d26b3b | 2477 | |
90ecc6e2 | 2478 | return 0; |
b8d26b3b NB |
2479 | } |
2480 | ||
2481 | static int | |
2482 | isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2483 | { | |
2484 | int ret; | |
2485 | ||
2486 | switch (state) { | |
2487 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
2488 | ret = isert_put_nopin(cmd, conn, false); | |
2489 | break; | |
2490 | default: | |
2491 | pr_err("Unknown immediate state: 0x%02x\n", state); | |
2492 | ret = -EINVAL; | |
2493 | break; | |
2494 | } | |
2495 | ||
2496 | return ret; | |
2497 | } | |
2498 | ||
2499 | static int | |
2500 | isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
2501 | { | |
2502 | int ret; | |
2503 | ||
2504 | switch (state) { | |
2505 | case ISTATE_SEND_LOGOUTRSP: | |
2506 | ret = isert_put_logout_rsp(cmd, conn); | |
2507 | if (!ret) { | |
2508 | pr_debug("Returning iSER Logout -EAGAIN\n"); | |
2509 | ret = -EAGAIN; | |
2510 | } | |
2511 | break; | |
2512 | case ISTATE_SEND_NOPIN: | |
2513 | ret = isert_put_nopin(cmd, conn, true); | |
2514 | break; | |
2515 | case ISTATE_SEND_TASKMGTRSP: | |
2516 | ret = isert_put_tm_rsp(cmd, conn); | |
2517 | break; | |
2518 | case ISTATE_SEND_REJECT: | |
2519 | ret = isert_put_reject(cmd, conn); | |
2520 | break; | |
adb54c29 NB |
2521 | case ISTATE_SEND_TEXTRSP: |
2522 | ret = isert_put_text_rsp(cmd, conn); | |
2523 | break; | |
b8d26b3b NB |
2524 | case ISTATE_SEND_STATUS: |
2525 | /* | |
2526 | * Special case for sending non GOOD SCSI status from TX thread | |
2527 | * context during pre se_cmd excecution failure. | |
2528 | */ | |
2529 | ret = isert_put_response(conn, cmd); | |
2530 | break; | |
2531 | default: | |
2532 | pr_err("Unknown response state: 0x%02x\n", state); | |
2533 | ret = -EINVAL; | |
2534 | break; | |
2535 | } | |
2536 | ||
2537 | return ret; | |
2538 | } | |
2539 | ||
2540 | static int | |
2541 | isert_setup_np(struct iscsi_np *np, | |
2542 | struct __kernel_sockaddr_storage *ksockaddr) | |
2543 | { | |
2544 | struct isert_np *isert_np; | |
2545 | struct rdma_cm_id *isert_lid; | |
2546 | struct sockaddr *sa; | |
2547 | int ret; | |
2548 | ||
2549 | isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); | |
2550 | if (!isert_np) { | |
2551 | pr_err("Unable to allocate struct isert_np\n"); | |
2552 | return -ENOMEM; | |
2553 | } | |
2554 | init_waitqueue_head(&isert_np->np_accept_wq); | |
2555 | mutex_init(&isert_np->np_accept_mutex); | |
2556 | INIT_LIST_HEAD(&isert_np->np_accept_list); | |
2557 | init_completion(&isert_np->np_login_comp); | |
2558 | ||
2559 | sa = (struct sockaddr *)ksockaddr; | |
2560 | pr_debug("ksockaddr: %p, sa: %p\n", ksockaddr, sa); | |
2561 | /* | |
2562 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
2563 | * in iscsi_target_configfs.c code.. | |
2564 | */ | |
2565 | memcpy(&np->np_sockaddr, ksockaddr, | |
2566 | sizeof(struct __kernel_sockaddr_storage)); | |
2567 | ||
2568 | isert_lid = rdma_create_id(isert_cma_handler, np, RDMA_PS_TCP, | |
2569 | IB_QPT_RC); | |
2570 | if (IS_ERR(isert_lid)) { | |
2571 | pr_err("rdma_create_id() for isert_listen_handler failed: %ld\n", | |
2572 | PTR_ERR(isert_lid)); | |
2573 | ret = PTR_ERR(isert_lid); | |
2574 | goto out; | |
2575 | } | |
2576 | ||
2577 | ret = rdma_bind_addr(isert_lid, sa); | |
2578 | if (ret) { | |
2579 | pr_err("rdma_bind_addr() for isert_lid failed: %d\n", ret); | |
2580 | goto out_lid; | |
2581 | } | |
2582 | ||
2583 | ret = rdma_listen(isert_lid, ISERT_RDMA_LISTEN_BACKLOG); | |
2584 | if (ret) { | |
2585 | pr_err("rdma_listen() for isert_lid failed: %d\n", ret); | |
2586 | goto out_lid; | |
2587 | } | |
2588 | ||
2589 | isert_np->np_cm_id = isert_lid; | |
2590 | np->np_context = isert_np; | |
2591 | pr_debug("Setup isert_lid->context: %p\n", isert_lid->context); | |
2592 | ||
2593 | return 0; | |
2594 | ||
2595 | out_lid: | |
2596 | rdma_destroy_id(isert_lid); | |
2597 | out: | |
2598 | kfree(isert_np); | |
2599 | return ret; | |
2600 | } | |
2601 | ||
2602 | static int | |
2603 | isert_check_accept_queue(struct isert_np *isert_np) | |
2604 | { | |
2605 | int empty; | |
2606 | ||
2607 | mutex_lock(&isert_np->np_accept_mutex); | |
2608 | empty = list_empty(&isert_np->np_accept_list); | |
2609 | mutex_unlock(&isert_np->np_accept_mutex); | |
2610 | ||
2611 | return empty; | |
2612 | } | |
2613 | ||
2614 | static int | |
2615 | isert_rdma_accept(struct isert_conn *isert_conn) | |
2616 | { | |
2617 | struct rdma_cm_id *cm_id = isert_conn->conn_cm_id; | |
2618 | struct rdma_conn_param cp; | |
2619 | int ret; | |
2620 | ||
2621 | memset(&cp, 0, sizeof(struct rdma_conn_param)); | |
2622 | cp.responder_resources = isert_conn->responder_resources; | |
2623 | cp.initiator_depth = isert_conn->initiator_depth; | |
2624 | cp.retry_count = 7; | |
2625 | cp.rnr_retry_count = 7; | |
2626 | ||
2627 | pr_debug("Before rdma_accept >>>>>>>>>>>>>>>>>>>>.\n"); | |
2628 | ||
2629 | ret = rdma_accept(cm_id, &cp); | |
2630 | if (ret) { | |
2631 | pr_err("rdma_accept() failed with: %d\n", ret); | |
2632 | return ret; | |
2633 | } | |
2634 | ||
2635 | pr_debug("After rdma_accept >>>>>>>>>>>>>>>>>>>>>.\n"); | |
2636 | ||
2637 | return 0; | |
2638 | } | |
2639 | ||
2640 | static int | |
2641 | isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
2642 | { | |
2643 | struct isert_conn *isert_conn = (struct isert_conn *)conn->context; | |
2644 | int ret; | |
2645 | ||
2646 | pr_debug("isert_get_login_rx before conn_login_comp conn: %p\n", conn); | |
6faaa85f NB |
2647 | /* |
2648 | * For login requests after the first PDU, isert_rx_login_req() will | |
2649 | * kick schedule_delayed_work(&conn->login_work) as the packet is | |
2650 | * received, which turns this callback from iscsi_target_do_login_rx() | |
2651 | * into a NOP. | |
2652 | */ | |
2653 | if (!login->first_request) | |
2654 | return 0; | |
b8d26b3b NB |
2655 | |
2656 | ret = wait_for_completion_interruptible(&isert_conn->conn_login_comp); | |
2657 | if (ret) | |
2658 | return ret; | |
2659 | ||
2660 | pr_debug("isert_get_login_rx processing login->req: %p\n", login->req); | |
2661 | return 0; | |
2662 | } | |
2663 | ||
2664 | static void | |
2665 | isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, | |
2666 | struct isert_conn *isert_conn) | |
2667 | { | |
2668 | struct rdma_cm_id *cm_id = isert_conn->conn_cm_id; | |
2669 | struct rdma_route *cm_route = &cm_id->route; | |
2670 | struct sockaddr_in *sock_in; | |
2671 | struct sockaddr_in6 *sock_in6; | |
2672 | ||
2673 | conn->login_family = np->np_sockaddr.ss_family; | |
2674 | ||
2675 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
2676 | sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.dst_addr; | |
2677 | snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c", | |
2678 | &sock_in6->sin6_addr.in6_u); | |
2679 | conn->login_port = ntohs(sock_in6->sin6_port); | |
2680 | ||
2681 | sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.src_addr; | |
2682 | snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c", | |
2683 | &sock_in6->sin6_addr.in6_u); | |
2684 | conn->local_port = ntohs(sock_in6->sin6_port); | |
2685 | } else { | |
2686 | sock_in = (struct sockaddr_in *)&cm_route->addr.dst_addr; | |
2687 | sprintf(conn->login_ip, "%pI4", | |
2688 | &sock_in->sin_addr.s_addr); | |
2689 | conn->login_port = ntohs(sock_in->sin_port); | |
2690 | ||
2691 | sock_in = (struct sockaddr_in *)&cm_route->addr.src_addr; | |
2692 | sprintf(conn->local_ip, "%pI4", | |
2693 | &sock_in->sin_addr.s_addr); | |
2694 | conn->local_port = ntohs(sock_in->sin_port); | |
2695 | } | |
2696 | } | |
2697 | ||
2698 | static int | |
2699 | isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
2700 | { | |
2701 | struct isert_np *isert_np = (struct isert_np *)np->np_context; | |
2702 | struct isert_conn *isert_conn; | |
2703 | int max_accept = 0, ret; | |
2704 | ||
2705 | accept_wait: | |
2706 | ret = wait_event_interruptible(isert_np->np_accept_wq, | |
2707 | !isert_check_accept_queue(isert_np) || | |
2708 | np->np_thread_state == ISCSI_NP_THREAD_RESET); | |
2709 | if (max_accept > 5) | |
2710 | return -ENODEV; | |
2711 | ||
2712 | spin_lock_bh(&np->np_thread_lock); | |
2713 | if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { | |
2714 | spin_unlock_bh(&np->np_thread_lock); | |
2715 | pr_err("ISCSI_NP_THREAD_RESET for isert_accept_np\n"); | |
2716 | return -ENODEV; | |
2717 | } | |
2718 | spin_unlock_bh(&np->np_thread_lock); | |
2719 | ||
2720 | mutex_lock(&isert_np->np_accept_mutex); | |
2721 | if (list_empty(&isert_np->np_accept_list)) { | |
2722 | mutex_unlock(&isert_np->np_accept_mutex); | |
2723 | max_accept++; | |
2724 | goto accept_wait; | |
2725 | } | |
2726 | isert_conn = list_first_entry(&isert_np->np_accept_list, | |
2727 | struct isert_conn, conn_accept_node); | |
2728 | list_del_init(&isert_conn->conn_accept_node); | |
2729 | mutex_unlock(&isert_np->np_accept_mutex); | |
2730 | ||
2731 | conn->context = isert_conn; | |
2732 | isert_conn->conn = conn; | |
2733 | max_accept = 0; | |
2734 | ||
2735 | ret = isert_rdma_post_recvl(isert_conn); | |
2736 | if (ret) | |
2737 | return ret; | |
2738 | ||
2739 | ret = isert_rdma_accept(isert_conn); | |
2740 | if (ret) | |
2741 | return ret; | |
2742 | ||
2743 | isert_set_conn_info(np, conn, isert_conn); | |
2744 | ||
2745 | pr_debug("Processing isert_accept_np: isert_conn: %p\n", isert_conn); | |
2746 | return 0; | |
2747 | } | |
2748 | ||
2749 | static void | |
2750 | isert_free_np(struct iscsi_np *np) | |
2751 | { | |
2752 | struct isert_np *isert_np = (struct isert_np *)np->np_context; | |
2753 | ||
2754 | rdma_destroy_id(isert_np->np_cm_id); | |
2755 | ||
2756 | np->np_context = NULL; | |
2757 | kfree(isert_np); | |
2758 | } | |
2759 | ||
defd8848 | 2760 | static void isert_wait_conn(struct iscsi_conn *conn) |
b8d26b3b NB |
2761 | { |
2762 | struct isert_conn *isert_conn = conn->context; | |
2763 | ||
defd8848 | 2764 | pr_debug("isert_wait_conn: Starting \n"); |
b8d26b3b NB |
2765 | /* |
2766 | * Decrement post_send_buf_count for special case when called | |
2767 | * from isert_do_control_comp() -> iscsit_logout_post_handler() | |
2768 | */ | |
b2cb9649 | 2769 | mutex_lock(&isert_conn->conn_mutex); |
b8d26b3b NB |
2770 | if (isert_conn->logout_posted) |
2771 | atomic_dec(&isert_conn->post_send_buf_count); | |
2772 | ||
b2cb9649 | 2773 | if (isert_conn->conn_cm_id && isert_conn->state != ISER_CONN_DOWN) { |
defd8848 | 2774 | pr_debug("Calling rdma_disconnect from isert_wait_conn\n"); |
b8d26b3b | 2775 | rdma_disconnect(isert_conn->conn_cm_id); |
b2cb9649 | 2776 | } |
b8d26b3b NB |
2777 | /* |
2778 | * Only wait for conn_wait_comp_err if the isert_conn made it | |
2779 | * into full feature phase.. | |
2780 | */ | |
b2cb9649 NB |
2781 | if (isert_conn->state == ISER_CONN_INIT) { |
2782 | mutex_unlock(&isert_conn->conn_mutex); | |
b2cb9649 | 2783 | return; |
b8d26b3b | 2784 | } |
defd8848 NB |
2785 | if (isert_conn->state == ISER_CONN_UP) |
2786 | isert_conn->state = ISER_CONN_TERMINATING; | |
b2cb9649 | 2787 | mutex_unlock(&isert_conn->conn_mutex); |
b8d26b3b | 2788 | |
defd8848 NB |
2789 | wait_for_completion(&isert_conn->conn_wait_comp_err); |
2790 | ||
2791 | wait_for_completion(&isert_conn->conn_wait); | |
2792 | } | |
2793 | ||
2794 | static void isert_free_conn(struct iscsi_conn *conn) | |
2795 | { | |
2796 | struct isert_conn *isert_conn = conn->context; | |
b8d26b3b NB |
2797 | |
2798 | isert_put_conn(isert_conn); | |
2799 | } | |
2800 | ||
2801 | static struct iscsit_transport iser_target_transport = { | |
2802 | .name = "IB/iSER", | |
2803 | .transport_type = ISCSI_INFINIBAND, | |
d703ce2f | 2804 | .priv_size = sizeof(struct isert_cmd), |
b8d26b3b NB |
2805 | .owner = THIS_MODULE, |
2806 | .iscsit_setup_np = isert_setup_np, | |
2807 | .iscsit_accept_np = isert_accept_np, | |
2808 | .iscsit_free_np = isert_free_np, | |
defd8848 | 2809 | .iscsit_wait_conn = isert_wait_conn, |
b8d26b3b | 2810 | .iscsit_free_conn = isert_free_conn, |
b8d26b3b NB |
2811 | .iscsit_get_login_rx = isert_get_login_rx, |
2812 | .iscsit_put_login_tx = isert_put_login_tx, | |
2813 | .iscsit_immediate_queue = isert_immediate_queue, | |
2814 | .iscsit_response_queue = isert_response_queue, | |
2815 | .iscsit_get_dataout = isert_get_dataout, | |
2816 | .iscsit_queue_data_in = isert_put_datain, | |
2817 | .iscsit_queue_status = isert_put_response, | |
2818 | }; | |
2819 | ||
2820 | static int __init isert_init(void) | |
2821 | { | |
2822 | int ret; | |
2823 | ||
2824 | isert_rx_wq = alloc_workqueue("isert_rx_wq", 0, 0); | |
2825 | if (!isert_rx_wq) { | |
2826 | pr_err("Unable to allocate isert_rx_wq\n"); | |
2827 | return -ENOMEM; | |
2828 | } | |
2829 | ||
2830 | isert_comp_wq = alloc_workqueue("isert_comp_wq", 0, 0); | |
2831 | if (!isert_comp_wq) { | |
2832 | pr_err("Unable to allocate isert_comp_wq\n"); | |
2833 | ret = -ENOMEM; | |
2834 | goto destroy_rx_wq; | |
2835 | } | |
2836 | ||
b8d26b3b NB |
2837 | iscsit_register_transport(&iser_target_transport); |
2838 | pr_debug("iSER_TARGET[0] - Loaded iser_target_transport\n"); | |
2839 | return 0; | |
2840 | ||
b8d26b3b NB |
2841 | destroy_rx_wq: |
2842 | destroy_workqueue(isert_rx_wq); | |
2843 | return ret; | |
2844 | } | |
2845 | ||
2846 | static void __exit isert_exit(void) | |
2847 | { | |
b8d26b3b NB |
2848 | destroy_workqueue(isert_comp_wq); |
2849 | destroy_workqueue(isert_rx_wq); | |
2850 | iscsit_unregister_transport(&iser_target_transport); | |
2851 | pr_debug("iSER_TARGET[0] - Released iser_target_transport\n"); | |
2852 | } | |
2853 | ||
2854 | MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); | |
2855 | MODULE_VERSION("0.1"); | |
2856 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
2857 | MODULE_LICENSE("GPL"); | |
2858 | ||
2859 | module_init(isert_init); | |
2860 | module_exit(isert_exit); |