1 | /* |
2 | * iSER transport for the Open iSCSI Initiator & iSER transport internals |
3 | * |
4 | * Copyright (C) 2004 Dmitry Yusupov |
5 | * Copyright (C) 2004 Alex Aizman |
6 | * Copyright (C) 2005 Mike Christie |
7 | * based on code maintained by open-iscsi@googlegroups.com |
8 | * |
9 | * Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved. |
10 | * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. |
11 | * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved. |
12 | * |
13 | * This software is available to you under a choice of one of two |
14 | * licenses. You may choose to be licensed under the terms of the GNU |
15 | * General Public License (GPL) Version 2, available from the file |
16 | * COPYING in the main directory of this source tree, or the |
17 | * OpenIB.org BSD license below: |
18 | * |
19 | * Redistribution and use in source and binary forms, with or |
20 | * without modification, are permitted provided that the following |
21 | * conditions are met: |
22 | * |
23 | * - Redistributions of source code must retain the above |
24 | * copyright notice, this list of conditions and the following |
25 | * disclaimer. |
26 | * |
27 | * - Redistributions in binary form must reproduce the above |
28 | * copyright notice, this list of conditions and the following |
29 | * disclaimer in the documentation and/or other materials |
30 | * provided with the distribution. |
31 | * |
32 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
33 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
34 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
35 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
36 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
37 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
38 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
39 | * SOFTWARE. |
40 | */ |
41 | #ifndef __ISCSI_ISER_H__ |
42 | #define __ISCSI_ISER_H__ |
43 | |
44 | #include <linux/types.h> |
45 | #include <linux/net.h> |
46 | #include <linux/printk.h> |
47 | #include <scsi/libiscsi.h> |
48 | #include <scsi/scsi_transport_iscsi.h> |
49 | #include <scsi/scsi_cmnd.h> |
50 | #include <scsi/scsi_device.h> |
51 | #include <scsi/iser.h> |
52 | |
53 | #include <linux/interrupt.h> |
54 | #include <linux/wait.h> |
55 | #include <linux/sched.h> |
56 | #include <linux/list.h> |
57 | #include <linux/slab.h> |
58 | #include <linux/dma-mapping.h> |
59 | #include <linux/mutex.h> |
60 | #include <linux/mempool.h> |
61 | #include <linux/uio.h> |
62 | |
63 | #include <linux/socket.h> |
64 | #include <linux/in.h> |
65 | #include <linux/in6.h> |
66 | |
67 | #include <rdma/ib_verbs.h> |
68 | #include <rdma/rdma_cm.h> |
69 | |
70 | #define DRV_NAME "iser" |
71 | #define PFX DRV_NAME ": " |
72 | #define DRV_VER "1.6" |
73 | |
74 | #define iser_dbg(fmt, arg...) \ |
75 | do { \ |
76 | if (unlikely(iser_debug_level > 2)) \ |
77 | printk(KERN_DEBUG PFX "%s: " fmt,\ |
78 | __func__ , ## arg); \ |
79 | } while (0) |
80 | |
81 | #define iser_warn(fmt, arg...) \ |
82 | do { \ |
83 | if (unlikely(iser_debug_level > 0)) \ |
84 | pr_warn(PFX "%s: " fmt, \ |
85 | __func__ , ## arg); \ |
86 | } while (0) |
87 | |
88 | #define iser_info(fmt, arg...) \ |
89 | do { \ |
90 | if (unlikely(iser_debug_level > 1)) \ |
91 | pr_info(PFX "%s: " fmt, \ |
92 | __func__ , ## arg); \ |
93 | } while (0) |
94 | |
95 | #define iser_err(fmt, arg...) \ |
96 | pr_err(PFX "%s: " fmt, __func__ , ## arg) |
97 | |
98 | /* Default support is 512KB I/O size */ |
99 | #define ISER_DEF_MAX_SECTORS 1024 |
100 | #define ISCSI_ISER_DEF_SG_TABLESIZE \ |
101 | ((ISER_DEF_MAX_SECTORS * SECTOR_SIZE) >> ilog2(SZ_4K)) |
102 | /* Maximum support is 16MB I/O size */ |
103 | #define ISCSI_ISER_MAX_SG_TABLESIZE ((32768 * SECTOR_SIZE) >> ilog2(SZ_4K)) |
104 | |
105 | #define ISER_DEF_XMIT_CMDS_DEFAULT 512 |
106 | #if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT |
107 | #define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX |
108 | #else |
109 | #define ISER_DEF_XMIT_CMDS_MAX ISER_DEF_XMIT_CMDS_DEFAULT |
110 | #endif |
111 | #define ISER_DEF_CMD_PER_LUN ISER_DEF_XMIT_CMDS_MAX |
112 | |
113 | /* QP settings */ |
114 | /* Maximal bounds on received asynchronous PDUs */ |
115 | #define ISER_MAX_RX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */ |
116 | |
117 | #define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), * |
118 | * SCSI_TMFUNC(2), LOGOUT(1) */ |
119 | |
120 | #define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX) |
121 | |
122 | /* the max TX (send) WR supported by the iSER QP is defined by * |
123 | * max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect * |
124 | * to have at max for SCSI command. The tx posting & completion handling code * |
125 | * supports -EAGAIN scheme where tx is suspended till the QP has room for more * |
126 | * send WR. D=8 comes from 64K/8K */ |
127 | |
128 | #define ISER_INFLIGHT_DATAOUTS 8 |
129 | |
130 | #define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ |
131 | (1 + ISER_INFLIGHT_DATAOUTS) + \ |
132 | ISER_MAX_TX_MISC_PDUS + \ |
133 | ISER_MAX_RX_MISC_PDUS) |
134 | |
135 | /* Max registration work requests per command */ |
136 | #define ISER_MAX_REG_WR_PER_CMD 5 |
137 | |
138 | /* For Signature we don't support DATAOUTs so no need to make room for them */ |
139 | #define ISER_QP_SIG_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ |
140 | (1 + ISER_MAX_REG_WR_PER_CMD) + \ |
141 | ISER_MAX_TX_MISC_PDUS + \ |
142 | ISER_MAX_RX_MISC_PDUS) |
143 | |
144 | #define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \ |
145 | - ISER_MAX_TX_MISC_PDUS \ |
146 | - ISER_MAX_RX_MISC_PDUS) / \ |
147 | (1 + ISER_INFLIGHT_DATAOUTS)) |
148 | |
149 | /* Constant PDU lengths calculations */ |
150 | #define (sizeof(struct iser_ctrl) + sizeof(struct iscsi_hdr)) |
151 | |
152 | #define ISER_RECV_DATA_SEG_LEN 128 |
153 | #define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN) |
154 | #define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN) |
155 | |
156 | /* Length of an object name string */ |
157 | #define ISER_OBJECT_NAME_SIZE 64 |
158 | |
159 | enum iser_conn_state { |
160 | ISER_CONN_INIT, /* descriptor allocd, no conn */ |
161 | ISER_CONN_PENDING, /* in the process of being established */ |
162 | ISER_CONN_UP, /* up and running */ |
163 | ISER_CONN_TERMINATING, /* in the process of being terminated */ |
164 | ISER_CONN_DOWN, /* shut down */ |
165 | ISER_CONN_STATES_NUM |
166 | }; |
167 | |
168 | enum iser_task_status { |
169 | ISER_TASK_STATUS_INIT = 0, |
170 | ISER_TASK_STATUS_STARTED, |
171 | ISER_TASK_STATUS_COMPLETED |
172 | }; |
173 | |
174 | enum iser_data_dir { |
175 | ISER_DIR_IN = 0, /* to initiator */ |
176 | ISER_DIR_OUT, /* from initiator */ |
177 | ISER_DIRS_NUM |
178 | }; |
179 | |
180 | /** |
181 | * struct iser_data_buf - iSER data buffer |
182 | * |
183 | * @sg: pointer to the sg list |
184 | * @size: num entries of this sg |
185 | * @data_len: total beffer byte len |
186 | * @dma_nents: returned by dma_map_sg |
187 | */ |
188 | struct iser_data_buf { |
189 | struct scatterlist *sg; |
190 | int size; |
191 | unsigned long data_len; |
192 | int dma_nents; |
193 | }; |
194 | |
195 | /* fwd declarations */ |
196 | struct iser_device; |
197 | struct iscsi_iser_task; |
198 | struct iscsi_endpoint; |
199 | struct iser_reg_resources; |
200 | |
201 | /** |
202 | * struct iser_mem_reg - iSER memory registration info |
203 | * |
204 | * @sge: memory region sg element |
205 | * @rkey: memory region remote key |
206 | * @desc: pointer to fast registration context |
207 | */ |
208 | struct iser_mem_reg { |
209 | struct ib_sge sge; |
210 | u32 rkey; |
211 | struct iser_fr_desc *desc; |
212 | }; |
213 | |
214 | enum iser_desc_type { |
215 | ISCSI_TX_CONTROL , |
216 | ISCSI_TX_SCSI_COMMAND, |
217 | ISCSI_TX_DATAOUT |
218 | }; |
219 | |
220 | /** |
221 | * struct iser_tx_desc - iSER TX descriptor |
222 | * |
223 | * @iser_header: iser header |
224 | * @iscsi_header: iscsi header |
225 | * @type: command/control/dataout |
226 | * @dma_addr: header buffer dma_address |
227 | * @tx_sg: sg[0] points to iser/iscsi headers |
228 | * sg[1] optionally points to either of immediate data |
229 | * unsolicited data-out or control |
230 | * @num_sge: number sges used on this TX task |
231 | * @cqe: completion handler |
232 | * @mapped: Is the task header mapped |
233 | * @reg_wr: registration WR |
234 | * @send_wr: send WR |
235 | * @inv_wr: invalidate WR |
236 | */ |
237 | struct iser_tx_desc { |
238 | struct iser_ctrl ; |
239 | struct iscsi_hdr ; |
240 | enum iser_desc_type type; |
241 | u64 dma_addr; |
242 | struct ib_sge tx_sg[2]; |
243 | int num_sge; |
244 | struct ib_cqe cqe; |
245 | bool mapped; |
246 | struct ib_reg_wr reg_wr; |
247 | struct ib_send_wr send_wr; |
248 | struct ib_send_wr inv_wr; |
249 | }; |
250 | |
251 | #define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \ |
252 | sizeof(u64) + sizeof(struct ib_sge) + \ |
253 | sizeof(struct ib_cqe))) |
254 | /** |
255 | * struct iser_rx_desc - iSER RX descriptor |
256 | * |
257 | * @iser_header: iser header |
258 | * @iscsi_header: iscsi header |
259 | * @data: received data segment |
260 | * @dma_addr: receive buffer dma address |
261 | * @rx_sg: ib_sge of receive buffer |
262 | * @cqe: completion handler |
263 | * @pad: for sense data TODO: Modify to maximum sense length supported |
264 | */ |
265 | struct iser_rx_desc { |
266 | struct iser_ctrl ; |
267 | struct iscsi_hdr ; |
268 | char data[ISER_RECV_DATA_SEG_LEN]; |
269 | u64 dma_addr; |
270 | struct ib_sge rx_sg; |
271 | struct ib_cqe cqe; |
272 | char pad[ISER_RX_PAD_SIZE]; |
273 | } __packed; |
274 | |
275 | /** |
276 | * struct iser_login_desc - iSER login descriptor |
277 | * |
278 | * @req: pointer to login request buffer |
279 | * @rsp: pointer to login response buffer |
280 | * @req_dma: DMA address of login request buffer |
281 | * @rsp_dma: DMA address of login response buffer |
282 | * @sge: IB sge for login post recv |
283 | * @cqe: completion handler |
284 | */ |
285 | struct iser_login_desc { |
286 | void *req; |
287 | void *rsp; |
288 | u64 req_dma; |
289 | u64 rsp_dma; |
290 | struct ib_sge sge; |
291 | struct ib_cqe cqe; |
292 | } __packed; |
293 | |
294 | struct iser_conn; |
295 | struct ib_conn; |
296 | |
297 | /** |
298 | * struct iser_device - iSER device handle |
299 | * |
300 | * @ib_device: RDMA device |
301 | * @pd: Protection Domain for this device |
302 | * @mr: Global DMA memory region |
303 | * @event_handler: IB events handle routine |
304 | * @ig_list: entry in devices list |
305 | * @refcount: Reference counter, dominated by open iser connections |
306 | */ |
307 | struct iser_device { |
308 | struct ib_device *ib_device; |
309 | struct ib_pd *pd; |
310 | struct ib_event_handler event_handler; |
311 | struct list_head ig_list; |
312 | int refcount; |
313 | }; |
314 | |
315 | /** |
316 | * struct iser_reg_resources - Fast registration resources |
317 | * |
318 | * @mr: memory region |
319 | * @sig_mr: signature memory region |
320 | * @mr_valid: is mr valid indicator |
321 | */ |
322 | struct iser_reg_resources { |
323 | struct ib_mr *mr; |
324 | struct ib_mr *sig_mr; |
325 | u8 mr_valid:1; |
326 | }; |
327 | |
328 | /** |
329 | * struct iser_fr_desc - Fast registration descriptor |
330 | * |
331 | * @list: entry in connection fastreg pool |
332 | * @rsc: data buffer registration resources |
333 | * @sig_protected: is region protected indicator |
334 | * @all_list: first and last list members |
335 | */ |
336 | struct iser_fr_desc { |
337 | struct list_head list; |
338 | struct iser_reg_resources rsc; |
339 | bool sig_protected; |
340 | struct list_head all_list; |
341 | }; |
342 | |
343 | /** |
344 | * struct iser_fr_pool - connection fast registration pool |
345 | * |
346 | * @list: list of fastreg descriptors |
347 | * @lock: protects fastreg pool |
348 | * @size: size of the pool |
349 | * @all_list: first and last list members |
350 | */ |
351 | struct iser_fr_pool { |
352 | struct list_head list; |
353 | spinlock_t lock; |
354 | int size; |
355 | struct list_head all_list; |
356 | }; |
357 | |
358 | /** |
359 | * struct ib_conn - Infiniband related objects |
360 | * |
361 | * @cma_id: rdma_cm connection maneger handle |
362 | * @qp: Connection Queue-pair |
363 | * @cq: Connection completion queue |
364 | * @cq_size: The number of max outstanding completions |
365 | * @device: reference to iser device |
366 | * @fr_pool: connection fast registration pool |
367 | * @pi_support: Indicate device T10-PI support |
368 | * @reg_cqe: completion handler |
369 | */ |
370 | struct ib_conn { |
371 | struct rdma_cm_id *cma_id; |
372 | struct ib_qp *qp; |
373 | struct ib_cq *cq; |
374 | u32 cq_size; |
375 | struct iser_device *device; |
376 | struct iser_fr_pool fr_pool; |
377 | bool pi_support; |
378 | struct ib_cqe reg_cqe; |
379 | }; |
380 | |
381 | /** |
382 | * struct iser_conn - iSER connection context |
383 | * |
384 | * @ib_conn: connection RDMA resources |
385 | * @iscsi_conn: link to matching iscsi connection |
386 | * @ep: transport handle |
387 | * @state: connection logical state |
388 | * @qp_max_recv_dtos: maximum number of data outs, corresponds |
389 | * to max number of post recvs |
390 | * @max_cmds: maximum cmds allowed for this connection |
391 | * @name: connection peer portal |
392 | * @release_work: deffered work for release job |
393 | * @state_mutex: protects iser onnection state |
394 | * @stop_completion: conn_stop completion |
395 | * @ib_completion: RDMA cleanup completion |
396 | * @up_completion: connection establishment completed |
397 | * (state is ISER_CONN_UP) |
398 | * @conn_list: entry in ig conn list |
399 | * @login_desc: login descriptor |
400 | * @rx_descs: rx buffers array (cyclic buffer) |
401 | * @num_rx_descs: number of rx descriptors |
402 | * @scsi_sg_tablesize: scsi host sg_tablesize |
403 | * @pages_per_mr: maximum pages available for registration |
404 | * @snd_w_inv: connection uses remote invalidation |
405 | */ |
406 | struct iser_conn { |
407 | struct ib_conn ib_conn; |
408 | struct iscsi_conn *iscsi_conn; |
409 | struct iscsi_endpoint *ep; |
410 | enum iser_conn_state state; |
411 | unsigned qp_max_recv_dtos; |
412 | u16 max_cmds; |
413 | char name[ISER_OBJECT_NAME_SIZE]; |
414 | struct work_struct release_work; |
415 | struct mutex state_mutex; |
416 | struct completion stop_completion; |
417 | struct completion ib_completion; |
418 | struct completion up_completion; |
419 | struct list_head conn_list; |
420 | struct iser_login_desc login_desc; |
421 | struct iser_rx_desc *rx_descs; |
422 | u32 num_rx_descs; |
423 | unsigned short scsi_sg_tablesize; |
424 | unsigned short pages_per_mr; |
425 | bool snd_w_inv; |
426 | }; |
427 | |
428 | /** |
429 | * struct iscsi_iser_task - iser task context |
430 | * |
431 | * @desc: TX descriptor |
432 | * @iser_conn: link to iser connection |
433 | * @status: current task status |
434 | * @sc: link to scsi command |
435 | * @command_sent: indicate if command was sent |
436 | * @dir: iser data direction |
437 | * @rdma_reg: task rdma registration desc |
438 | * @data: iser data buffer desc |
439 | * @prot: iser protection buffer desc |
440 | */ |
441 | struct iscsi_iser_task { |
442 | struct iser_tx_desc desc; |
443 | struct iser_conn *iser_conn; |
444 | enum iser_task_status status; |
445 | struct scsi_cmnd *sc; |
446 | int command_sent; |
447 | int dir[ISER_DIRS_NUM]; |
448 | struct iser_mem_reg rdma_reg[ISER_DIRS_NUM]; |
449 | struct iser_data_buf data[ISER_DIRS_NUM]; |
450 | struct iser_data_buf prot[ISER_DIRS_NUM]; |
451 | }; |
452 | |
453 | /** |
454 | * struct iser_global - iSER global context |
455 | * |
456 | * @device_list_mutex: protects device_list |
457 | * @device_list: iser devices global list |
458 | * @connlist_mutex: protects connlist |
459 | * @connlist: iser connections global list |
460 | * @desc_cache: kmem cache for tx dataout |
461 | */ |
462 | struct iser_global { |
463 | struct mutex device_list_mutex; |
464 | struct list_head device_list; |
465 | struct mutex connlist_mutex; |
466 | struct list_head connlist; |
467 | struct kmem_cache *desc_cache; |
468 | }; |
469 | |
470 | extern struct iser_global ig; |
471 | extern int iser_debug_level; |
472 | extern bool iser_pi_enable; |
473 | extern unsigned int iser_max_sectors; |
474 | extern bool iser_always_reg; |
475 | |
476 | int iser_send_control(struct iscsi_conn *conn, |
477 | struct iscsi_task *task); |
478 | |
479 | int iser_send_command(struct iscsi_conn *conn, |
480 | struct iscsi_task *task); |
481 | |
482 | int iser_send_data_out(struct iscsi_conn *conn, |
483 | struct iscsi_task *task, |
484 | struct iscsi_data *hdr); |
485 | |
486 | void iscsi_iser_recv(struct iscsi_conn *conn, |
487 | struct iscsi_hdr *hdr, |
488 | char *rx_data, |
489 | int rx_data_len); |
490 | |
491 | void iser_conn_init(struct iser_conn *iser_conn); |
492 | |
493 | void iser_conn_release(struct iser_conn *iser_conn); |
494 | |
495 | int iser_conn_terminate(struct iser_conn *iser_conn); |
496 | |
497 | void iser_release_work(struct work_struct *work); |
498 | |
499 | void iser_err_comp(struct ib_wc *wc, const char *type); |
500 | void iser_login_rsp(struct ib_cq *cq, struct ib_wc *wc); |
501 | void iser_task_rsp(struct ib_cq *cq, struct ib_wc *wc); |
502 | void iser_cmd_comp(struct ib_cq *cq, struct ib_wc *wc); |
503 | void iser_ctrl_comp(struct ib_cq *cq, struct ib_wc *wc); |
504 | void iser_dataout_comp(struct ib_cq *cq, struct ib_wc *wc); |
505 | void iser_reg_comp(struct ib_cq *cq, struct ib_wc *wc); |
506 | |
507 | void iser_task_rdma_init(struct iscsi_iser_task *task); |
508 | |
509 | void iser_task_rdma_finalize(struct iscsi_iser_task *task); |
510 | |
511 | void iser_free_rx_descriptors(struct iser_conn *iser_conn); |
512 | |
513 | void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, |
514 | struct iser_data_buf *mem, |
515 | enum iser_data_dir cmd_dir); |
516 | |
517 | int iser_reg_mem_fastreg(struct iscsi_iser_task *task, |
518 | enum iser_data_dir dir, |
519 | bool all_imm); |
520 | void iser_unreg_mem_fastreg(struct iscsi_iser_task *task, |
521 | enum iser_data_dir dir); |
522 | |
523 | int iser_connect(struct iser_conn *iser_conn, |
524 | struct sockaddr *src_addr, |
525 | struct sockaddr *dst_addr, |
526 | int non_blocking); |
527 | |
528 | int iser_post_recvl(struct iser_conn *iser_conn); |
529 | int iser_post_recvm(struct iser_conn *iser_conn, |
530 | struct iser_rx_desc *rx_desc); |
531 | int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc); |
532 | |
533 | int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, |
534 | enum iser_data_dir iser_dir, |
535 | enum dma_data_direction dma_dir); |
536 | |
537 | void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, |
538 | enum iser_data_dir iser_dir, |
539 | enum dma_data_direction dma_dir); |
540 | |
541 | int (struct iscsi_task *task, |
542 | struct iser_tx_desc *tx_desc); |
543 | int iser_alloc_rx_descriptors(struct iser_conn *iser_conn, |
544 | struct iscsi_session *session); |
545 | int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, |
546 | unsigned cmds_max, |
547 | unsigned int size); |
548 | void iser_free_fastreg_pool(struct ib_conn *ib_conn); |
549 | u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, |
550 | enum iser_data_dir cmd_dir, sector_t *sector); |
551 | |
552 | static inline struct iser_conn * |
553 | to_iser_conn(struct ib_conn *ib_conn) |
554 | { |
555 | return container_of(ib_conn, struct iser_conn, ib_conn); |
556 | } |
557 | |
558 | static inline struct iser_rx_desc * |
559 | iser_rx(struct ib_cqe *cqe) |
560 | { |
561 | return container_of(cqe, struct iser_rx_desc, cqe); |
562 | } |
563 | |
564 | static inline struct iser_tx_desc * |
565 | iser_tx(struct ib_cqe *cqe) |
566 | { |
567 | return container_of(cqe, struct iser_tx_desc, cqe); |
568 | } |
569 | |
570 | static inline struct iser_login_desc * |
571 | iser_login(struct ib_cqe *cqe) |
572 | { |
573 | return container_of(cqe, struct iser_login_desc, cqe); |
574 | } |
575 | |
576 | #endif |
577 | |