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49cd5382 OG |
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. | |
3ee07d27 | 11 | * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved. |
49cd5382 OG |
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. | |
49cd5382 OG |
40 | */ |
41 | #ifndef __ISCSI_ISER_H__ | |
42 | #define __ISCSI_ISER_H__ | |
43 | ||
44 | #include <linux/types.h> | |
45 | #include <linux/net.h> | |
4f363882 | 46 | #include <linux/printk.h> |
49cd5382 OG |
47 | #include <scsi/libiscsi.h> |
48 | #include <scsi/scsi_transport_iscsi.h> | |
177e31bd SG |
49 | #include <scsi/scsi_cmnd.h> |
50 | #include <scsi/scsi_device.h> | |
d3cf81f9 | 51 | #include <scsi/iser.h> |
49cd5382 | 52 | |
a6b7a407 | 53 | #include <linux/interrupt.h> |
49cd5382 OG |
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/ib_fmr_pool.h> | |
69 | #include <rdma/rdma_cm.h> | |
70 | ||
71 | #define DRV_NAME "iser" | |
72 | #define PFX DRV_NAME ": " | |
4fcd1470 | 73 | #define DRV_VER "1.6" |
49cd5382 | 74 | |
e9d49b82 SG |
75 | #define iser_dbg(fmt, arg...) \ |
76 | do { \ | |
60e20908 | 77 | if (unlikely(iser_debug_level > 2)) \ |
e9d49b82 SG |
78 | printk(KERN_DEBUG PFX "%s: " fmt,\ |
79 | __func__ , ## arg); \ | |
6f735e36 ED |
80 | } while (0) |
81 | ||
82 | #define iser_warn(fmt, arg...) \ | |
4f363882 | 83 | do { \ |
60e20908 | 84 | if (unlikely(iser_debug_level > 0)) \ |
e9d49b82 | 85 | pr_warn(PFX "%s: " fmt, \ |
4f363882 RD |
86 | __func__ , ## arg); \ |
87 | } while (0) | |
88 | ||
89 | #define iser_info(fmt, arg...) \ | |
49cd5382 | 90 | do { \ |
60e20908 | 91 | if (unlikely(iser_debug_level > 1)) \ |
e9d49b82 | 92 | pr_info(PFX "%s: " fmt, \ |
49cd5382 OG |
93 | __func__ , ## arg); \ |
94 | } while (0) | |
95 | ||
60e20908 SG |
96 | #define iser_err(fmt, arg...) \ |
97 | pr_err(PFX "%s: " fmt, __func__ , ## arg) | |
49cd5382 | 98 | |
8dfa0876 | 99 | #define SHIFT_4K 12 |
0ace64b8 | 100 | #define SIZE_4K (1ULL << SHIFT_4K) |
8dfa0876 | 101 | #define MASK_4K (~(SIZE_4K-1)) |
df749cdc SG |
102 | |
103 | /* Default support is 512KB I/O size */ | |
104 | #define ISER_DEF_MAX_SECTORS 1024 | |
105 | #define ISCSI_ISER_DEF_SG_TABLESIZE ((ISER_DEF_MAX_SECTORS * 512) >> SHIFT_4K) | |
106 | /* Maximum support is 8MB I/O size */ | |
107 | #define ISCSI_ISER_MAX_SG_TABLESIZE ((16384 * 512) >> SHIFT_4K) | |
108 | ||
b7f04513 SP |
109 | #define ISER_DEF_XMIT_CMDS_DEFAULT 512 |
110 | #if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT | |
111 | #define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX | |
112 | #else | |
113 | #define ISER_DEF_XMIT_CMDS_MAX ISER_DEF_XMIT_CMDS_DEFAULT | |
114 | #endif | |
115 | #define ISER_DEF_CMD_PER_LUN ISER_DEF_XMIT_CMDS_MAX | |
49cd5382 OG |
116 | |
117 | /* QP settings */ | |
118 | /* Maximal bounds on received asynchronous PDUs */ | |
119 | #define ISER_MAX_RX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */ | |
120 | ||
121 | #define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), * | |
122 | * SCSI_TMFUNC(2), LOGOUT(1) */ | |
123 | ||
b7f04513 | 124 | #define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX) |
bcc60c38 | 125 | |
b7f04513 | 126 | #define ISER_MIN_POSTED_RX (ISER_DEF_XMIT_CMDS_MAX >> 2) |
49cd5382 OG |
127 | |
128 | /* the max TX (send) WR supported by the iSER QP is defined by * | |
129 | * max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect * | |
130 | * to have at max for SCSI command. The tx posting & completion handling code * | |
131 | * supports -EAGAIN scheme where tx is suspended till the QP has room for more * | |
132 | * send WR. D=8 comes from 64K/8K */ | |
133 | ||
134 | #define ISER_INFLIGHT_DATAOUTS 8 | |
135 | ||
b7f04513 | 136 | #define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ |
49cd5382 OG |
137 | (1 + ISER_INFLIGHT_DATAOUTS) + \ |
138 | ISER_MAX_TX_MISC_PDUS + \ | |
139 | ISER_MAX_RX_MISC_PDUS) | |
140 | ||
6b5a8fb0 AT |
141 | /* Max registration work requests per command */ |
142 | #define ISER_MAX_REG_WR_PER_CMD 5 | |
143 | ||
144 | /* For Signature we don't support DATAOUTs so no need to make room for them */ | |
145 | #define ISER_QP_SIG_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ | |
146 | (1 + ISER_MAX_REG_WR_PER_CMD) + \ | |
147 | ISER_MAX_TX_MISC_PDUS + \ | |
148 | ISER_MAX_RX_MISC_PDUS) | |
149 | ||
f4641ef7 MT |
150 | #define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \ |
151 | - ISER_MAX_TX_MISC_PDUS \ | |
152 | - ISER_MAX_RX_MISC_PDUS) / \ | |
153 | (1 + ISER_INFLIGHT_DATAOUTS)) | |
154 | ||
6df5a128 | 155 | #define ISER_SIGNAL_CMD_COUNT 32 |
6e6fe2fb | 156 | |
bcc60c38 | 157 | /* Constant PDU lengths calculations */ |
d3cf81f9 | 158 | #define ISER_HEADERS_LEN (sizeof(struct iser_ctrl) + sizeof(struct iscsi_hdr)) |
bcc60c38 OG |
159 | |
160 | #define ISER_RECV_DATA_SEG_LEN 128 | |
161 | #define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN) | |
162 | #define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN) | |
49cd5382 OG |
163 | |
164 | /* Length of an object name string */ | |
165 | #define ISER_OBJECT_NAME_SIZE 64 | |
166 | ||
5716af6e | 167 | enum iser_conn_state { |
49cd5382 OG |
168 | ISER_CONN_INIT, /* descriptor allocd, no conn */ |
169 | ISER_CONN_PENDING, /* in the process of being established */ | |
170 | ISER_CONN_UP, /* up and running */ | |
171 | ISER_CONN_TERMINATING, /* in the process of being terminated */ | |
172 | ISER_CONN_DOWN, /* shut down */ | |
173 | ISER_CONN_STATES_NUM | |
174 | }; | |
175 | ||
176 | enum iser_task_status { | |
177 | ISER_TASK_STATUS_INIT = 0, | |
178 | ISER_TASK_STATUS_STARTED, | |
179 | ISER_TASK_STATUS_COMPLETED | |
180 | }; | |
181 | ||
182 | enum iser_data_dir { | |
183 | ISER_DIR_IN = 0, /* to initiator */ | |
184 | ISER_DIR_OUT, /* from initiator */ | |
185 | ISER_DIRS_NUM | |
186 | }; | |
187 | ||
cd88621a SG |
188 | /** |
189 | * struct iser_data_buf - iSER data buffer | |
190 | * | |
e3784bd1 | 191 | * @sg: pointer to the sg list |
cd88621a SG |
192 | * @size: num entries of this sg |
193 | * @data_len: total beffer byte len | |
194 | * @dma_nents: returned by dma_map_sg | |
cd88621a | 195 | */ |
49cd5382 | 196 | struct iser_data_buf { |
e3784bd1 | 197 | struct scatterlist *sg; |
39405885 | 198 | int size; |
cd88621a SG |
199 | unsigned long data_len; |
200 | unsigned int dma_nents; | |
dd0107a0 | 201 | }; |
49cd5382 OG |
202 | |
203 | /* fwd declarations */ | |
204 | struct iser_device; | |
2261ec3d | 205 | struct iscsi_iser_task; |
412eeafa | 206 | struct iscsi_endpoint; |
32467c42 | 207 | struct iser_reg_resources; |
49cd5382 | 208 | |
cd88621a SG |
209 | /** |
210 | * struct iser_mem_reg - iSER memory registration info | |
211 | * | |
90a6684c SG |
212 | * @sge: memory region sg element |
213 | * @rkey: memory region remote key | |
cd88621a | 214 | * @mem_h: pointer to registration context (FMR/Fastreg) |
cd88621a | 215 | */ |
49cd5382 | 216 | struct iser_mem_reg { |
90a6684c SG |
217 | struct ib_sge sge; |
218 | u32 rkey; | |
219 | void *mem_h; | |
49cd5382 OG |
220 | }; |
221 | ||
49cd5382 | 222 | enum iser_desc_type { |
49cd5382 OG |
223 | ISCSI_TX_CONTROL , |
224 | ISCSI_TX_SCSI_COMMAND, | |
225 | ISCSI_TX_DATAOUT | |
226 | }; | |
227 | ||
7332bed0 SG |
228 | /* Maximum number of work requests per task: |
229 | * Data memory region local invalidate + fast registration | |
230 | * Protection memory region local invalidate + fast registration | |
231 | * Signature memory region local invalidate + fast registration | |
232 | * PDU send | |
233 | */ | |
234 | #define ISER_MAX_WRS 7 | |
235 | ||
cd88621a | 236 | /** |
cfeb91b3 | 237 | * struct iser_tx_desc - iSER TX descriptor |
cd88621a SG |
238 | * |
239 | * @iser_header: iser header | |
240 | * @iscsi_header: iscsi header | |
241 | * @type: command/control/dataout | |
242 | * @dam_addr: header buffer dma_address | |
243 | * @tx_sg: sg[0] points to iser/iscsi headers | |
244 | * sg[1] optionally points to either of immediate data | |
245 | * unsolicited data-out or control | |
246 | * @num_sge: number sges used on this TX task | |
8d5944d8 | 247 | * @mapped: Is the task header mapped |
7332bed0 SG |
248 | * @wr_idx: Current WR index |
249 | * @wrs: Array of WRs per task | |
250 | * @data_reg: Data buffer registration details | |
251 | * @prot_reg: Protection buffer registration details | |
252 | * @sig_attrs: Signature attributes | |
cd88621a | 253 | */ |
f19624aa | 254 | struct iser_tx_desc { |
d3cf81f9 | 255 | struct iser_ctrl iser_header; |
49cd5382 | 256 | struct iscsi_hdr iscsi_header; |
49cd5382 | 257 | enum iser_desc_type type; |
f19624aa | 258 | u64 dma_addr; |
f19624aa OG |
259 | struct ib_sge tx_sg[2]; |
260 | int num_sge; | |
cfeb91b3 | 261 | struct ib_cqe cqe; |
8d5944d8 | 262 | bool mapped; |
7332bed0 | 263 | u8 wr_idx; |
e622f2f4 CH |
264 | union iser_wr { |
265 | struct ib_send_wr send; | |
39405885 | 266 | struct ib_reg_wr fast_reg; |
e622f2f4 CH |
267 | struct ib_sig_handover_wr sig; |
268 | } wrs[ISER_MAX_WRS]; | |
7332bed0 SG |
269 | struct iser_mem_reg data_reg; |
270 | struct iser_mem_reg prot_reg; | |
271 | struct ib_sig_attrs sig_attrs; | |
49cd5382 OG |
272 | }; |
273 | ||
bcc60c38 | 274 | #define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \ |
cfeb91b3 CH |
275 | sizeof(u64) + sizeof(struct ib_sge) + \ |
276 | sizeof(struct ib_cqe))) | |
cd88621a | 277 | /** |
cfeb91b3 | 278 | * struct iser_rx_desc - iSER RX descriptor |
cd88621a SG |
279 | * |
280 | * @iser_header: iser header | |
281 | * @iscsi_header: iscsi header | |
282 | * @data: received data segment | |
283 | * @dma_addr: receive buffer dma address | |
284 | * @rx_sg: ib_sge of receive buffer | |
285 | * @pad: for sense data TODO: Modify to maximum sense length supported | |
286 | */ | |
bcc60c38 | 287 | struct iser_rx_desc { |
d3cf81f9 | 288 | struct iser_ctrl iser_header; |
bcc60c38 OG |
289 | struct iscsi_hdr iscsi_header; |
290 | char data[ISER_RECV_DATA_SEG_LEN]; | |
291 | u64 dma_addr; | |
292 | struct ib_sge rx_sg; | |
cfeb91b3 | 293 | struct ib_cqe cqe; |
bcc60c38 | 294 | char pad[ISER_RX_PAD_SIZE]; |
cfeb91b3 | 295 | } __packed; |
0f512b34 SG |
296 | |
297 | /** | |
298 | * struct iser_login_desc - iSER login descriptor | |
299 | * | |
300 | * @req: pointer to login request buffer | |
301 | * @resp: pointer to login response buffer | |
302 | * @req_dma: DMA address of login request buffer | |
303 | * @rsp_dma: DMA address of login response buffer | |
304 | * @sge: IB sge for login post recv | |
cfeb91b3 | 305 | * @cqe: completion handler |
0f512b34 SG |
306 | */ |
307 | struct iser_login_desc { | |
308 | void *req; | |
309 | void *rsp; | |
310 | u64 req_dma; | |
311 | u64 rsp_dma; | |
312 | struct ib_sge sge; | |
cfeb91b3 | 313 | struct ib_cqe cqe; |
bcc60c38 OG |
314 | } __attribute__((packed)); |
315 | ||
b4e155ff | 316 | struct iser_conn; |
a4ee3539 | 317 | struct ib_conn; |
b4e155ff SG |
318 | struct iscsi_iser_task; |
319 | ||
bf175540 SG |
320 | /** |
321 | * struct iser_comp - iSER completion context | |
322 | * | |
6aabfa76 | 323 | * @cq: completion queue |
bf175540 SG |
324 | * @active_qps: Number of active QPs attached |
325 | * to completion context | |
326 | */ | |
327 | struct iser_comp { | |
6aabfa76 | 328 | struct ib_cq *cq; |
bf175540 SG |
329 | int active_qps; |
330 | }; | |
331 | ||
48afbff6 SG |
332 | /** |
333 | * struct iser_device - Memory registration operations | |
334 | * per-device registration schemes | |
335 | * | |
336 | * @alloc_reg_res: Allocate registration resources | |
337 | * @free_reg_res: Free registration resources | |
32467c42 SG |
338 | * @fast_reg_mem: Register memory buffers |
339 | * @unreg_mem: Un-register memory buffers | |
81722909 SG |
340 | * @reg_desc_get: Get a registration descriptor for pool |
341 | * @reg_desc_put: Get a registration descriptor to pool | |
48afbff6 SG |
342 | */ |
343 | struct iser_reg_ops { | |
344 | int (*alloc_reg_res)(struct ib_conn *ib_conn, | |
f8db651d SG |
345 | unsigned cmds_max, |
346 | unsigned int size); | |
48afbff6 | 347 | void (*free_reg_res)(struct ib_conn *ib_conn); |
32467c42 SG |
348 | int (*reg_mem)(struct iscsi_iser_task *iser_task, |
349 | struct iser_data_buf *mem, | |
350 | struct iser_reg_resources *rsc, | |
351 | struct iser_mem_reg *reg); | |
352 | void (*unreg_mem)(struct iscsi_iser_task *iser_task, | |
353 | enum iser_data_dir cmd_dir); | |
81722909 SG |
354 | struct iser_fr_desc * (*reg_desc_get)(struct ib_conn *ib_conn); |
355 | void (*reg_desc_put)(struct ib_conn *ib_conn, | |
356 | struct iser_fr_desc *desc); | |
48afbff6 SG |
357 | }; |
358 | ||
cd88621a SG |
359 | /** |
360 | * struct iser_device - iSER device handle | |
361 | * | |
362 | * @ib_device: RDMA device | |
363 | * @pd: Protection Domain for this device | |
cd88621a SG |
364 | * @mr: Global DMA memory region |
365 | * @event_handler: IB events handle routine | |
366 | * @ig_list: entry in devices list | |
367 | * @refcount: Reference counter, dominated by open iser connections | |
368 | * @comps_used: Number of completion contexts used, Min between online | |
369 | * cpus and device max completion vectors | |
370 | * @comps: Dinamically allocated array of completion handlers | |
48afbff6 | 371 | * @reg_ops: Registration ops |
59caaed7 | 372 | * @remote_inv_sup: Remote invalidate is supported on this device |
cd88621a | 373 | */ |
49cd5382 OG |
374 | struct iser_device { |
375 | struct ib_device *ib_device; | |
376 | struct ib_pd *pd; | |
2110f9bf | 377 | struct ib_event_handler event_handler; |
cd88621a | 378 | struct list_head ig_list; |
49cd5382 | 379 | int refcount; |
bf175540 | 380 | int comps_used; |
da64bdb2 | 381 | struct iser_comp *comps; |
2392a4cd | 382 | const struct iser_reg_ops *reg_ops; |
59caaed7 | 383 | bool remote_inv_sup; |
49cd5382 OG |
384 | }; |
385 | ||
177e31bd SG |
386 | #define ISER_CHECK_GUARD 0xc0 |
387 | #define ISER_CHECK_REFTAG 0x0f | |
388 | #define ISER_CHECK_APPTAG 0x30 | |
389 | ||
d711d81d SG |
390 | /** |
391 | * struct iser_reg_resources - Fast registration recources | |
392 | * | |
393 | * @mr: memory region | |
2b3bf958 | 394 | * @fmr_pool: pool of fmrs |
2b3bf958 | 395 | * @page_vec: fast reg page list used by fmr pool |
d711d81d SG |
396 | * @mr_valid: is mr valid indicator |
397 | */ | |
398 | struct iser_reg_resources { | |
2b3bf958 AL |
399 | union { |
400 | struct ib_mr *mr; | |
401 | struct ib_fmr_pool *fmr_pool; | |
402 | }; | |
39405885 | 403 | struct iser_page_vec *page_vec; |
d711d81d | 404 | u8 mr_valid:1; |
6b5a8fb0 AT |
405 | }; |
406 | ||
cd88621a SG |
407 | /** |
408 | * struct iser_pi_context - Protection information context | |
409 | * | |
d711d81d SG |
410 | * @rsc: protection buffer registration resources |
411 | * @sig_mr: signature enable memory region | |
412 | * @sig_mr_valid: is sig_mr valid indicator | |
413 | * @sig_protected: is region protected indicator | |
cd88621a | 414 | */ |
6b5a8fb0 | 415 | struct iser_pi_context { |
d711d81d | 416 | struct iser_reg_resources rsc; |
6b5a8fb0 | 417 | struct ib_mr *sig_mr; |
d711d81d SG |
418 | u8 sig_mr_valid:1; |
419 | u8 sig_protected:1; | |
73bc06b7 SG |
420 | }; |
421 | ||
cd88621a | 422 | /** |
5190cc26 | 423 | * struct iser_fr_desc - Fast registration descriptor |
cd88621a SG |
424 | * |
425 | * @list: entry in connection fastreg pool | |
d711d81d | 426 | * @rsc: data buffer registration resources |
cd88621a | 427 | * @pi_ctx: protection information context |
cd88621a | 428 | */ |
5190cc26 | 429 | struct iser_fr_desc { |
5587856c | 430 | struct list_head list; |
d711d81d | 431 | struct iser_reg_resources rsc; |
6b5a8fb0 | 432 | struct iser_pi_context *pi_ctx; |
ea174c95 | 433 | struct list_head all_list; |
5587856c SG |
434 | }; |
435 | ||
385ad87d SG |
436 | /** |
437 | * struct iser_fr_pool: connection fast registration pool | |
438 | * | |
2b3bf958 | 439 | * @list: list of fastreg descriptors |
385ad87d | 440 | * @lock: protects fmr/fastreg pool |
2b3bf958 | 441 | * @size: size of the pool |
385ad87d SG |
442 | */ |
443 | struct iser_fr_pool { | |
2b3bf958 AL |
444 | struct list_head list; |
445 | spinlock_t lock; | |
446 | int size; | |
ea174c95 | 447 | struct list_head all_list; |
385ad87d SG |
448 | }; |
449 | ||
a4ee3539 SG |
450 | /** |
451 | * struct ib_conn - Infiniband related objects | |
452 | * | |
453 | * @cma_id: rdma_cm connection maneger handle | |
454 | * @qp: Connection Queue-pair | |
455 | * @post_recv_buf_count: post receive counter | |
6ec9d4d2 | 456 | * @sig_count: send work request signal count |
a4ee3539 SG |
457 | * @rx_wr: receive work request for batch posts |
458 | * @device: reference to iser device | |
bf175540 | 459 | * @comp: iser completion context |
385ad87d | 460 | * @fr_pool: connection fast registration poool |
cfeb91b3 | 461 | * @pi_support: Indicate device T10-PI support |
a4ee3539 SG |
462 | */ |
463 | struct ib_conn { | |
464 | struct rdma_cm_id *cma_id; | |
465 | struct ib_qp *qp; | |
466 | int post_recv_buf_count; | |
6ec9d4d2 | 467 | u8 sig_count; |
a4ee3539 SG |
468 | struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; |
469 | struct iser_device *device; | |
bf175540 | 470 | struct iser_comp *comp; |
385ad87d | 471 | struct iser_fr_pool fr_pool; |
cfeb91b3 | 472 | bool pi_support; |
cfeb91b3 | 473 | struct ib_cqe reg_cqe; |
a4ee3539 SG |
474 | }; |
475 | ||
cd88621a SG |
476 | /** |
477 | * struct iser_conn - iSER connection context | |
478 | * | |
479 | * @ib_conn: connection RDMA resources | |
480 | * @iscsi_conn: link to matching iscsi connection | |
481 | * @ep: transport handle | |
482 | * @state: connection logical state | |
483 | * @qp_max_recv_dtos: maximum number of data outs, corresponds | |
484 | * to max number of post recvs | |
485 | * @qp_max_recv_dtos_mask: (qp_max_recv_dtos - 1) | |
486 | * @min_posted_rx: (qp_max_recv_dtos >> 2) | |
f4641ef7 | 487 | * @max_cmds: maximum cmds allowed for this connection |
cd88621a SG |
488 | * @name: connection peer portal |
489 | * @release_work: deffered work for release job | |
490 | * @state_mutex: protects iser onnection state | |
491 | * @stop_completion: conn_stop completion | |
492 | * @ib_completion: RDMA cleanup completion | |
493 | * @up_completion: connection establishment completed | |
494 | * (state is ISER_CONN_UP) | |
495 | * @conn_list: entry in ig conn list | |
0f512b34 | 496 | * @login_desc: login descriptor |
cd88621a SG |
497 | * @rx_desc_head: head of rx_descs cyclic buffer |
498 | * @rx_descs: rx buffers array (cyclic buffer) | |
499 | * @num_rx_descs: number of rx descriptors | |
df749cdc | 500 | * @scsi_sg_tablesize: scsi host sg_tablesize |
cd88621a | 501 | */ |
49cd5382 | 502 | struct iser_conn { |
a4ee3539 | 503 | struct ib_conn ib_conn; |
4667f5df | 504 | struct iscsi_conn *iscsi_conn; |
412eeafa | 505 | struct iscsi_endpoint *ep; |
cd88621a SG |
506 | enum iser_conn_state state; |
507 | unsigned qp_max_recv_dtos; | |
508 | unsigned qp_max_recv_dtos_mask; | |
509 | unsigned min_posted_rx; | |
f4641ef7 | 510 | u16 max_cmds; |
49cd5382 | 511 | char name[ISER_OBJECT_NAME_SIZE]; |
b73c3ada | 512 | struct work_struct release_work; |
504130c0 | 513 | struct mutex state_mutex; |
c47a3c9e SG |
514 | struct completion stop_completion; |
515 | struct completion ib_completion; | |
9a6d3234 | 516 | struct completion up_completion; |
cd88621a | 517 | struct list_head conn_list; |
0f512b34 | 518 | struct iser_login_desc login_desc; |
bcc60c38 OG |
519 | unsigned int rx_desc_head; |
520 | struct iser_rx_desc *rx_descs; | |
6aabfa76 | 521 | u32 num_rx_descs; |
df749cdc | 522 | unsigned short scsi_sg_tablesize; |
59caaed7 | 523 | bool snd_w_inv; |
49cd5382 OG |
524 | }; |
525 | ||
cd88621a SG |
526 | /** |
527 | * struct iscsi_iser_task - iser task context | |
528 | * | |
529 | * @desc: TX descriptor | |
530 | * @iser_conn: link to iser connection | |
531 | * @status: current task status | |
532 | * @sc: link to scsi command | |
533 | * @command_sent: indicate if command was sent | |
534 | * @dir: iser data direction | |
b130eded | 535 | * @rdma_reg: task rdma registration desc |
cd88621a | 536 | * @data: iser data buffer desc |
cd88621a | 537 | * @prot: iser protection buffer desc |
cd88621a | 538 | */ |
2261ec3d | 539 | struct iscsi_iser_task { |
f19624aa | 540 | struct iser_tx_desc desc; |
5716af6e | 541 | struct iser_conn *iser_conn; |
49cd5382 | 542 | enum iser_task_status status; |
177e31bd | 543 | struct scsi_cmnd *sc; |
cd88621a SG |
544 | int command_sent; |
545 | int dir[ISER_DIRS_NUM]; | |
b130eded | 546 | struct iser_mem_reg rdma_reg[ISER_DIRS_NUM]; |
cd88621a | 547 | struct iser_data_buf data[ISER_DIRS_NUM]; |
cd88621a | 548 | struct iser_data_buf prot[ISER_DIRS_NUM]; |
49cd5382 OG |
549 | }; |
550 | ||
551 | struct iser_page_vec { | |
552 | u64 *pages; | |
bfe066e2 SG |
553 | int npages; |
554 | struct ib_mr fake_mr; | |
49cd5382 OG |
555 | }; |
556 | ||
cd88621a SG |
557 | /** |
558 | * struct iser_global: iSER global context | |
559 | * | |
560 | * @device_list_mutex: protects device_list | |
561 | * @device_list: iser devices global list | |
562 | * @connlist_mutex: protects connlist | |
563 | * @connlist: iser connections global list | |
564 | * @desc_cache: kmem cache for tx dataout | |
565 | */ | |
49cd5382 | 566 | struct iser_global { |
cd88621a SG |
567 | struct mutex device_list_mutex; |
568 | struct list_head device_list; | |
49cd5382 | 569 | struct mutex connlist_mutex; |
cd88621a | 570 | struct list_head connlist; |
e54f8188 | 571 | struct kmem_cache *desc_cache; |
49cd5382 OG |
572 | }; |
573 | ||
574 | extern struct iser_global ig; | |
575 | extern int iser_debug_level; | |
7f733847 AT |
576 | extern bool iser_pi_enable; |
577 | extern int iser_pi_guard; | |
df749cdc | 578 | extern unsigned int iser_max_sectors; |
3cffd930 | 579 | extern bool iser_always_reg; |
49cd5382 | 580 | |
48afbff6 SG |
581 | int iser_assign_reg_ops(struct iser_device *device); |
582 | ||
2747fdb2 | 583 | int iser_send_control(struct iscsi_conn *conn, |
2261ec3d | 584 | struct iscsi_task *task); |
49cd5382 | 585 | |
2747fdb2 | 586 | int iser_send_command(struct iscsi_conn *conn, |
2261ec3d | 587 | struct iscsi_task *task); |
49cd5382 | 588 | |
2747fdb2 | 589 | int iser_send_data_out(struct iscsi_conn *conn, |
2261ec3d | 590 | struct iscsi_task *task, |
2747fdb2 | 591 | struct iscsi_data *hdr); |
49cd5382 OG |
592 | |
593 | void iscsi_iser_recv(struct iscsi_conn *conn, | |
cd88621a SG |
594 | struct iscsi_hdr *hdr, |
595 | char *rx_data, | |
596 | int rx_data_len); | |
49cd5382 | 597 | |
5716af6e | 598 | void iser_conn_init(struct iser_conn *iser_conn); |
49cd5382 | 599 | |
5716af6e | 600 | void iser_conn_release(struct iser_conn *iser_conn); |
49cd5382 | 601 | |
c47a3c9e | 602 | int iser_conn_terminate(struct iser_conn *iser_conn); |
49cd5382 | 603 | |
b73c3ada AN |
604 | void iser_release_work(struct work_struct *work); |
605 | ||
cfeb91b3 CH |
606 | void iser_err_comp(struct ib_wc *wc, const char *type); |
607 | void iser_login_rsp(struct ib_cq *cq, struct ib_wc *wc); | |
608 | void iser_task_rsp(struct ib_cq *cq, struct ib_wc *wc); | |
609 | void iser_cmd_comp(struct ib_cq *cq, struct ib_wc *wc); | |
610 | void iser_ctrl_comp(struct ib_cq *cq, struct ib_wc *wc); | |
611 | void iser_dataout_comp(struct ib_cq *cq, struct ib_wc *wc); | |
612 | void iser_reg_comp(struct ib_cq *cq, struct ib_wc *wc); | |
49cd5382 | 613 | |
2261ec3d | 614 | void iser_task_rdma_init(struct iscsi_iser_task *task); |
49cd5382 | 615 | |
2261ec3d | 616 | void iser_task_rdma_finalize(struct iscsi_iser_task *task); |
49cd5382 | 617 | |
5716af6e | 618 | void iser_free_rx_descriptors(struct iser_conn *iser_conn); |
bcc60c38 | 619 | |
9a8b08fa SG |
620 | void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, |
621 | struct iser_data_buf *mem, | |
9a8b08fa | 622 | enum iser_data_dir cmd_dir); |
49cd5382 | 623 | |
32467c42 | 624 | int iser_reg_rdma_mem(struct iscsi_iser_task *task, |
b5f04b00 JD |
625 | enum iser_data_dir dir, |
626 | bool all_imm); | |
32467c42 SG |
627 | void iser_unreg_rdma_mem(struct iscsi_iser_task *task, |
628 | enum iser_data_dir dir); | |
49cd5382 | 629 | |
cd88621a SG |
630 | int iser_connect(struct iser_conn *iser_conn, |
631 | struct sockaddr *src_addr, | |
632 | struct sockaddr *dst_addr, | |
633 | int non_blocking); | |
49cd5382 | 634 | |
e657571b SG |
635 | void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task, |
636 | enum iser_data_dir cmd_dir); | |
7306b8fa SG |
637 | void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task, |
638 | enum iser_data_dir cmd_dir); | |
49cd5382 | 639 | |
5716af6e SG |
640 | int iser_post_recvl(struct iser_conn *iser_conn); |
641 | int iser_post_recvm(struct iser_conn *iser_conn, int count); | |
6df5a128 SG |
642 | int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, |
643 | bool signal); | |
49cd5382 | 644 | |
2261ec3d | 645 | int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, |
cd88621a SG |
646 | struct iser_data_buf *data, |
647 | enum iser_data_dir iser_dir, | |
648 | enum dma_data_direction dma_dir); | |
74a20780 | 649 | |
9a8b08fa | 650 | void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, |
c6c95ef4 RD |
651 | struct iser_data_buf *data, |
652 | enum dma_data_direction dir); | |
653 | ||
f19624aa OG |
654 | int iser_initialize_task_headers(struct iscsi_task *task, |
655 | struct iser_tx_desc *tx_desc); | |
5716af6e SG |
656 | int iser_alloc_rx_descriptors(struct iser_conn *iser_conn, |
657 | struct iscsi_session *session); | |
f8db651d SG |
658 | int iser_alloc_fmr_pool(struct ib_conn *ib_conn, |
659 | unsigned cmds_max, | |
660 | unsigned int size); | |
a4ee3539 | 661 | void iser_free_fmr_pool(struct ib_conn *ib_conn); |
f8db651d SG |
662 | int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, |
663 | unsigned cmds_max, | |
664 | unsigned int size); | |
a4ee3539 | 665 | void iser_free_fastreg_pool(struct ib_conn *ib_conn); |
0a7a08ad SG |
666 | u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, |
667 | enum iser_data_dir cmd_dir, sector_t *sector); | |
5190cc26 | 668 | struct iser_fr_desc * |
81722909 | 669 | iser_reg_desc_get_fr(struct ib_conn *ib_conn); |
bd8b944e | 670 | void |
81722909 SG |
671 | iser_reg_desc_put_fr(struct ib_conn *ib_conn, |
672 | struct iser_fr_desc *desc); | |
673 | struct iser_fr_desc * | |
674 | iser_reg_desc_get_fmr(struct ib_conn *ib_conn); | |
675 | void | |
676 | iser_reg_desc_put_fmr(struct ib_conn *ib_conn, | |
677 | struct iser_fr_desc *desc); | |
7332bed0 SG |
678 | |
679 | static inline struct ib_send_wr * | |
680 | iser_tx_next_wr(struct iser_tx_desc *tx_desc) | |
681 | { | |
e622f2f4 | 682 | struct ib_send_wr *cur_wr = &tx_desc->wrs[tx_desc->wr_idx].send; |
7332bed0 SG |
683 | struct ib_send_wr *last_wr; |
684 | ||
685 | if (tx_desc->wr_idx) { | |
e622f2f4 | 686 | last_wr = &tx_desc->wrs[tx_desc->wr_idx - 1].send; |
7332bed0 SG |
687 | last_wr->next = cur_wr; |
688 | } | |
689 | tx_desc->wr_idx++; | |
690 | ||
691 | return cur_wr; | |
692 | } | |
693 | ||
7edc5a99 SG |
694 | static inline struct iser_conn * |
695 | to_iser_conn(struct ib_conn *ib_conn) | |
696 | { | |
697 | return container_of(ib_conn, struct iser_conn, ib_conn); | |
698 | } | |
699 | ||
cfeb91b3 CH |
700 | static inline struct iser_rx_desc * |
701 | iser_rx(struct ib_cqe *cqe) | |
702 | { | |
703 | return container_of(cqe, struct iser_rx_desc, cqe); | |
704 | } | |
705 | ||
706 | static inline struct iser_tx_desc * | |
707 | iser_tx(struct ib_cqe *cqe) | |
708 | { | |
709 | return container_of(cqe, struct iser_tx_desc, cqe); | |
710 | } | |
711 | ||
712 | static inline struct iser_login_desc * | |
713 | iser_login(struct ib_cqe *cqe) | |
714 | { | |
715 | return container_of(cqe, struct iser_login_desc, cqe); | |
716 | } | |
717 | ||
49cd5382 | 718 | #endif |