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/ib_fmr_pool.h> 69 #include <rdma/rdma_cm.h> 70 71 #define DRV_NAME "iser" 72 #define PFX DRV_NAME ": " 73 #define DRV_VER "1.6" 74 75 #define iser_dbg(fmt, arg...) \ 76 do { \ 77 if (unlikely(iser_debug_level > 2)) \ 78 printk(KERN_DEBUG PFX "%s: " fmt,\ 79 __func__ , ## arg); \ 80 } while (0) 81 82 #define iser_warn(fmt, arg...) \ 83 do { \ 84 if (unlikely(iser_debug_level > 0)) \ 85 pr_warn(PFX "%s: " fmt, \ 86 __func__ , ## arg); \ 87 } while (0) 88 89 #define iser_info(fmt, arg...) \ 90 do { \ 91 if (unlikely(iser_debug_level > 1)) \ 92 pr_info(PFX "%s: " fmt, \ 93 __func__ , ## arg); \ 94 } while (0) 95 96 #define iser_err(fmt, arg...) \ 97 pr_err(PFX "%s: " fmt, __func__ , ## arg) 98 99 #define SHIFT_4K 12 100 #define SIZE_4K (1ULL << SHIFT_4K) 101 #define MASK_4K (~(SIZE_4K-1)) 102 103 /* Default support is 512KB I/O size */ 104 #define ISER_DEF_MAX_SECTORS 1024 105 #define ISCSI_ISER_DEF_SG_TABLESIZE \ 106 ((ISER_DEF_MAX_SECTORS * SECTOR_SIZE) >> SHIFT_4K) 107 /* Maximum support is 16MB I/O size */ 108 #define ISCSI_ISER_MAX_SG_TABLESIZE ((32768 * SECTOR_SIZE) >> SHIFT_4K) 109 110 #define ISER_DEF_XMIT_CMDS_DEFAULT 512 111 #if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT 112 #define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX 113 #else 114 #define ISER_DEF_XMIT_CMDS_MAX ISER_DEF_XMIT_CMDS_DEFAULT 115 #endif 116 #define ISER_DEF_CMD_PER_LUN ISER_DEF_XMIT_CMDS_MAX 117 118 /* QP settings */ 119 /* Maximal bounds on received asynchronous PDUs */ 120 #define ISER_MAX_RX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */ 121 122 #define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), * 123 * SCSI_TMFUNC(2), LOGOUT(1) */ 124 125 #define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX) 126 127 #define ISER_MIN_POSTED_RX (ISER_DEF_XMIT_CMDS_MAX >> 2) 128 129 /* the max TX (send) WR supported by the iSER QP is defined by * 130 * max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect * 131 * to have at max for SCSI command. The tx posting & completion handling code * 132 * supports -EAGAIN scheme where tx is suspended till the QP has room for more * 133 * send WR. D=8 comes from 64K/8K */ 134 135 #define ISER_INFLIGHT_DATAOUTS 8 136 137 #define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ 138 (1 + ISER_INFLIGHT_DATAOUTS) + \ 139 ISER_MAX_TX_MISC_PDUS + \ 140 ISER_MAX_RX_MISC_PDUS) 141 142 /* Max registration work requests per command */ 143 #define ISER_MAX_REG_WR_PER_CMD 5 144 145 /* For Signature we don't support DATAOUTs so no need to make room for them */ 146 #define ISER_QP_SIG_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ 147 (1 + ISER_MAX_REG_WR_PER_CMD) + \ 148 ISER_MAX_TX_MISC_PDUS + \ 149 ISER_MAX_RX_MISC_PDUS) 150 151 #define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \ 152 - ISER_MAX_TX_MISC_PDUS \ 153 - ISER_MAX_RX_MISC_PDUS) / \ 154 (1 + ISER_INFLIGHT_DATAOUTS)) 155 156 #define ISER_SIGNAL_CMD_COUNT 32 157 158 /* Constant PDU lengths calculations */ 159 #define ISER_HEADERS_LEN (sizeof(struct iser_ctrl) + sizeof(struct iscsi_hdr)) 160 161 #define ISER_RECV_DATA_SEG_LEN 128 162 #define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN) 163 #define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN) 164 165 /* Length of an object name string */ 166 #define ISER_OBJECT_NAME_SIZE 64 167 168 enum iser_conn_state { 169 ISER_CONN_INIT, /* descriptor allocd, no conn */ 170 ISER_CONN_PENDING, /* in the process of being established */ 171 ISER_CONN_UP, /* up and running */ 172 ISER_CONN_TERMINATING, /* in the process of being terminated */ 173 ISER_CONN_DOWN, /* shut down */ 174 ISER_CONN_STATES_NUM 175 }; 176 177 enum iser_task_status { 178 ISER_TASK_STATUS_INIT = 0, 179 ISER_TASK_STATUS_STARTED, 180 ISER_TASK_STATUS_COMPLETED 181 }; 182 183 enum iser_data_dir { 184 ISER_DIR_IN = 0, /* to initiator */ 185 ISER_DIR_OUT, /* from initiator */ 186 ISER_DIRS_NUM 187 }; 188 189 /** 190 * struct iser_data_buf - iSER data buffer 191 * 192 * @sg: pointer to the sg list 193 * @size: num entries of this sg 194 * @data_len: total beffer byte len 195 * @dma_nents: returned by dma_map_sg 196 */ 197 struct iser_data_buf { 198 struct scatterlist *sg; 199 int size; 200 unsigned long data_len; 201 int dma_nents; 202 }; 203 204 /* fwd declarations */ 205 struct iser_device; 206 struct iscsi_iser_task; 207 struct iscsi_endpoint; 208 struct iser_reg_resources; 209 210 /** 211 * struct iser_mem_reg - iSER memory registration info 212 * 213 * @sge: memory region sg element 214 * @rkey: memory region remote key 215 * @mem_h: pointer to registration context (FMR/Fastreg) 216 */ 217 struct iser_mem_reg { 218 struct ib_sge sge; 219 u32 rkey; 220 void *mem_h; 221 }; 222 223 enum iser_desc_type { 224 ISCSI_TX_CONTROL , 225 ISCSI_TX_SCSI_COMMAND, 226 ISCSI_TX_DATAOUT 227 }; 228 229 /** 230 * struct iser_tx_desc - iSER TX descriptor 231 * 232 * @iser_header: iser header 233 * @iscsi_header: iscsi header 234 * @type: command/control/dataout 235 * @dam_addr: header buffer dma_address 236 * @tx_sg: sg[0] points to iser/iscsi headers 237 * sg[1] optionally points to either of immediate data 238 * unsolicited data-out or control 239 * @num_sge: number sges used on this TX task 240 * @mapped: Is the task header mapped 241 * reg_wr: registration WR 242 * send_wr: send WR 243 * inv_wr: invalidate WR 244 */ 245 struct iser_tx_desc { 246 struct iser_ctrl iser_header; 247 struct iscsi_hdr iscsi_header; 248 enum iser_desc_type type; 249 u64 dma_addr; 250 struct ib_sge tx_sg[2]; 251 int num_sge; 252 struct ib_cqe cqe; 253 bool mapped; 254 struct ib_reg_wr reg_wr; 255 struct ib_send_wr send_wr; 256 struct ib_send_wr inv_wr; 257 }; 258 259 #define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \ 260 sizeof(u64) + sizeof(struct ib_sge) + \ 261 sizeof(struct ib_cqe))) 262 /** 263 * struct iser_rx_desc - iSER RX descriptor 264 * 265 * @iser_header: iser header 266 * @iscsi_header: iscsi header 267 * @data: received data segment 268 * @dma_addr: receive buffer dma address 269 * @rx_sg: ib_sge of receive buffer 270 * @pad: for sense data TODO: Modify to maximum sense length supported 271 */ 272 struct iser_rx_desc { 273 struct iser_ctrl iser_header; 274 struct iscsi_hdr iscsi_header; 275 char data[ISER_RECV_DATA_SEG_LEN]; 276 u64 dma_addr; 277 struct ib_sge rx_sg; 278 struct ib_cqe cqe; 279 char pad[ISER_RX_PAD_SIZE]; 280 } __packed; 281 282 /** 283 * struct iser_login_desc - iSER login descriptor 284 * 285 * @req: pointer to login request buffer 286 * @resp: pointer to login response buffer 287 * @req_dma: DMA address of login request buffer 288 * @rsp_dma: DMA address of login response buffer 289 * @sge: IB sge for login post recv 290 * @cqe: completion handler 291 */ 292 struct iser_login_desc { 293 void *req; 294 void *rsp; 295 u64 req_dma; 296 u64 rsp_dma; 297 struct ib_sge sge; 298 struct ib_cqe cqe; 299 } __packed; 300 301 struct iser_conn; 302 struct ib_conn; 303 struct iscsi_iser_task; 304 305 /** 306 * struct iser_comp - iSER completion context 307 * 308 * @cq: completion queue 309 * @active_qps: Number of active QPs attached 310 * to completion context 311 */ 312 struct iser_comp { 313 struct ib_cq *cq; 314 int active_qps; 315 }; 316 317 /** 318 * struct iser_device - Memory registration operations 319 * per-device registration schemes 320 * 321 * @alloc_reg_res: Allocate registration resources 322 * @free_reg_res: Free registration resources 323 * @fast_reg_mem: Register memory buffers 324 * @unreg_mem: Un-register memory buffers 325 * @reg_desc_get: Get a registration descriptor for pool 326 * @reg_desc_put: Get a registration descriptor to pool 327 */ 328 struct iser_reg_ops { 329 int (*alloc_reg_res)(struct ib_conn *ib_conn, 330 unsigned cmds_max, 331 unsigned int size); 332 void (*free_reg_res)(struct ib_conn *ib_conn); 333 int (*reg_mem)(struct iscsi_iser_task *iser_task, 334 struct iser_data_buf *mem, 335 struct iser_reg_resources *rsc, 336 struct iser_mem_reg *reg); 337 void (*unreg_mem)(struct iscsi_iser_task *iser_task, 338 enum iser_data_dir cmd_dir); 339 struct iser_fr_desc * (*reg_desc_get)(struct ib_conn *ib_conn); 340 void (*reg_desc_put)(struct ib_conn *ib_conn, 341 struct iser_fr_desc *desc); 342 }; 343 344 /** 345 * struct iser_device - iSER device handle 346 * 347 * @ib_device: RDMA device 348 * @pd: Protection Domain for this device 349 * @mr: Global DMA memory region 350 * @event_handler: IB events handle routine 351 * @ig_list: entry in devices list 352 * @refcount: Reference counter, dominated by open iser connections 353 * @comps_used: Number of completion contexts used, Min between online 354 * cpus and device max completion vectors 355 * @comps: Dinamically allocated array of completion handlers 356 * @reg_ops: Registration ops 357 * @remote_inv_sup: Remote invalidate is supported on this device 358 */ 359 struct iser_device { 360 struct ib_device *ib_device; 361 struct ib_pd *pd; 362 struct ib_event_handler event_handler; 363 struct list_head ig_list; 364 int refcount; 365 int comps_used; 366 struct iser_comp *comps; 367 const struct iser_reg_ops *reg_ops; 368 bool remote_inv_sup; 369 }; 370 371 /** 372 * struct iser_reg_resources - Fast registration recources 373 * 374 * @mr: memory region 375 * @fmr_pool: pool of fmrs 376 * @sig_mr: signature memory region 377 * @page_vec: fast reg page list used by fmr pool 378 * @mr_valid: is mr valid indicator 379 */ 380 struct iser_reg_resources { 381 union { 382 struct ib_mr *mr; 383 struct ib_fmr_pool *fmr_pool; 384 }; 385 struct ib_mr *sig_mr; 386 struct iser_page_vec *page_vec; 387 u8 mr_valid:1; 388 }; 389 390 /** 391 * struct iser_fr_desc - Fast registration descriptor 392 * 393 * @list: entry in connection fastreg pool 394 * @rsc: data buffer registration resources 395 * @sig_protected: is region protected indicator 396 */ 397 struct iser_fr_desc { 398 struct list_head list; 399 struct iser_reg_resources rsc; 400 bool sig_protected; 401 struct list_head all_list; 402 }; 403 404 /** 405 * struct iser_fr_pool: connection fast registration pool 406 * 407 * @list: list of fastreg descriptors 408 * @lock: protects fmr/fastreg pool 409 * @size: size of the pool 410 */ 411 struct iser_fr_pool { 412 struct list_head list; 413 spinlock_t lock; 414 int size; 415 struct list_head all_list; 416 }; 417 418 /** 419 * struct ib_conn - Infiniband related objects 420 * 421 * @cma_id: rdma_cm connection maneger handle 422 * @qp: Connection Queue-pair 423 * @post_recv_buf_count: post receive counter 424 * @sig_count: send work request signal count 425 * @rx_wr: receive work request for batch posts 426 * @device: reference to iser device 427 * @comp: iser completion context 428 * @fr_pool: connection fast registration poool 429 * @pi_support: Indicate device T10-PI support 430 */ 431 struct ib_conn { 432 struct rdma_cm_id *cma_id; 433 struct ib_qp *qp; 434 int post_recv_buf_count; 435 u8 sig_count; 436 struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; 437 struct iser_device *device; 438 struct iser_comp *comp; 439 struct iser_fr_pool fr_pool; 440 bool pi_support; 441 struct ib_cqe reg_cqe; 442 }; 443 444 /** 445 * struct iser_conn - iSER connection context 446 * 447 * @ib_conn: connection RDMA resources 448 * @iscsi_conn: link to matching iscsi connection 449 * @ep: transport handle 450 * @state: connection logical state 451 * @qp_max_recv_dtos: maximum number of data outs, corresponds 452 * to max number of post recvs 453 * @qp_max_recv_dtos_mask: (qp_max_recv_dtos - 1) 454 * @min_posted_rx: (qp_max_recv_dtos >> 2) 455 * @max_cmds: maximum cmds allowed for this connection 456 * @name: connection peer portal 457 * @release_work: deffered work for release job 458 * @state_mutex: protects iser onnection state 459 * @stop_completion: conn_stop completion 460 * @ib_completion: RDMA cleanup completion 461 * @up_completion: connection establishment completed 462 * (state is ISER_CONN_UP) 463 * @conn_list: entry in ig conn list 464 * @login_desc: login descriptor 465 * @rx_desc_head: head of rx_descs cyclic buffer 466 * @rx_descs: rx buffers array (cyclic buffer) 467 * @num_rx_descs: number of rx descriptors 468 * @scsi_sg_tablesize: scsi host sg_tablesize 469 * @pages_per_mr: maximum pages available for registration 470 */ 471 struct iser_conn { 472 struct ib_conn ib_conn; 473 struct iscsi_conn *iscsi_conn; 474 struct iscsi_endpoint *ep; 475 enum iser_conn_state state; 476 unsigned qp_max_recv_dtos; 477 unsigned qp_max_recv_dtos_mask; 478 unsigned min_posted_rx; 479 u16 max_cmds; 480 char name[ISER_OBJECT_NAME_SIZE]; 481 struct work_struct release_work; 482 struct mutex state_mutex; 483 struct completion stop_completion; 484 struct completion ib_completion; 485 struct completion up_completion; 486 struct list_head conn_list; 487 struct iser_login_desc login_desc; 488 unsigned int rx_desc_head; 489 struct iser_rx_desc *rx_descs; 490 u32 num_rx_descs; 491 unsigned short scsi_sg_tablesize; 492 unsigned short pages_per_mr; 493 bool snd_w_inv; 494 }; 495 496 /** 497 * struct iscsi_iser_task - iser task context 498 * 499 * @desc: TX descriptor 500 * @iser_conn: link to iser connection 501 * @status: current task status 502 * @sc: link to scsi command 503 * @command_sent: indicate if command was sent 504 * @dir: iser data direction 505 * @rdma_reg: task rdma registration desc 506 * @data: iser data buffer desc 507 * @prot: iser protection buffer desc 508 */ 509 struct iscsi_iser_task { 510 struct iser_tx_desc desc; 511 struct iser_conn *iser_conn; 512 enum iser_task_status status; 513 struct scsi_cmnd *sc; 514 int command_sent; 515 int dir[ISER_DIRS_NUM]; 516 struct iser_mem_reg rdma_reg[ISER_DIRS_NUM]; 517 struct iser_data_buf data[ISER_DIRS_NUM]; 518 struct iser_data_buf prot[ISER_DIRS_NUM]; 519 }; 520 521 struct iser_page_vec { 522 u64 *pages; 523 int npages; 524 struct ib_mr fake_mr; 525 }; 526 527 /** 528 * struct iser_global: iSER global context 529 * 530 * @device_list_mutex: protects device_list 531 * @device_list: iser devices global list 532 * @connlist_mutex: protects connlist 533 * @connlist: iser connections global list 534 * @desc_cache: kmem cache for tx dataout 535 */ 536 struct iser_global { 537 struct mutex device_list_mutex; 538 struct list_head device_list; 539 struct mutex connlist_mutex; 540 struct list_head connlist; 541 struct kmem_cache *desc_cache; 542 }; 543 544 extern struct iser_global ig; 545 extern int iser_debug_level; 546 extern bool iser_pi_enable; 547 extern int iser_pi_guard; 548 extern unsigned int iser_max_sectors; 549 extern bool iser_always_reg; 550 551 int iser_assign_reg_ops(struct iser_device *device); 552 553 int iser_send_control(struct iscsi_conn *conn, 554 struct iscsi_task *task); 555 556 int iser_send_command(struct iscsi_conn *conn, 557 struct iscsi_task *task); 558 559 int iser_send_data_out(struct iscsi_conn *conn, 560 struct iscsi_task *task, 561 struct iscsi_data *hdr); 562 563 void iscsi_iser_recv(struct iscsi_conn *conn, 564 struct iscsi_hdr *hdr, 565 char *rx_data, 566 int rx_data_len); 567 568 void iser_conn_init(struct iser_conn *iser_conn); 569 570 void iser_conn_release(struct iser_conn *iser_conn); 571 572 int iser_conn_terminate(struct iser_conn *iser_conn); 573 574 void iser_release_work(struct work_struct *work); 575 576 void iser_err_comp(struct ib_wc *wc, const char *type); 577 void iser_login_rsp(struct ib_cq *cq, struct ib_wc *wc); 578 void iser_task_rsp(struct ib_cq *cq, struct ib_wc *wc); 579 void iser_cmd_comp(struct ib_cq *cq, struct ib_wc *wc); 580 void iser_ctrl_comp(struct ib_cq *cq, struct ib_wc *wc); 581 void iser_dataout_comp(struct ib_cq *cq, struct ib_wc *wc); 582 void iser_reg_comp(struct ib_cq *cq, struct ib_wc *wc); 583 584 void iser_task_rdma_init(struct iscsi_iser_task *task); 585 586 void iser_task_rdma_finalize(struct iscsi_iser_task *task); 587 588 void iser_free_rx_descriptors(struct iser_conn *iser_conn); 589 590 void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, 591 struct iser_data_buf *mem, 592 enum iser_data_dir cmd_dir); 593 594 int iser_reg_rdma_mem(struct iscsi_iser_task *task, 595 enum iser_data_dir dir, 596 bool all_imm); 597 void iser_unreg_rdma_mem(struct iscsi_iser_task *task, 598 enum iser_data_dir dir); 599 600 int iser_connect(struct iser_conn *iser_conn, 601 struct sockaddr *src_addr, 602 struct sockaddr *dst_addr, 603 int non_blocking); 604 605 void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task, 606 enum iser_data_dir cmd_dir); 607 void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task, 608 enum iser_data_dir cmd_dir); 609 610 int iser_post_recvl(struct iser_conn *iser_conn); 611 int iser_post_recvm(struct iser_conn *iser_conn, int count); 612 int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, 613 bool signal); 614 615 int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, 616 struct iser_data_buf *data, 617 enum iser_data_dir iser_dir, 618 enum dma_data_direction dma_dir); 619 620 void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, 621 struct iser_data_buf *data, 622 enum dma_data_direction dir); 623 624 int iser_initialize_task_headers(struct iscsi_task *task, 625 struct iser_tx_desc *tx_desc); 626 int iser_alloc_rx_descriptors(struct iser_conn *iser_conn, 627 struct iscsi_session *session); 628 int iser_alloc_fmr_pool(struct ib_conn *ib_conn, 629 unsigned cmds_max, 630 unsigned int size); 631 void iser_free_fmr_pool(struct ib_conn *ib_conn); 632 int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, 633 unsigned cmds_max, 634 unsigned int size); 635 void iser_free_fastreg_pool(struct ib_conn *ib_conn); 636 u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, 637 enum iser_data_dir cmd_dir, sector_t *sector); 638 struct iser_fr_desc * 639 iser_reg_desc_get_fr(struct ib_conn *ib_conn); 640 void 641 iser_reg_desc_put_fr(struct ib_conn *ib_conn, 642 struct iser_fr_desc *desc); 643 struct iser_fr_desc * 644 iser_reg_desc_get_fmr(struct ib_conn *ib_conn); 645 void 646 iser_reg_desc_put_fmr(struct ib_conn *ib_conn, 647 struct iser_fr_desc *desc); 648 649 static inline struct iser_conn * 650 to_iser_conn(struct ib_conn *ib_conn) 651 { 652 return container_of(ib_conn, struct iser_conn, ib_conn); 653 } 654 655 static inline struct iser_rx_desc * 656 iser_rx(struct ib_cqe *cqe) 657 { 658 return container_of(cqe, struct iser_rx_desc, cqe); 659 } 660 661 static inline struct iser_tx_desc * 662 iser_tx(struct ib_cqe *cqe) 663 { 664 return container_of(cqe, struct iser_tx_desc, cqe); 665 } 666 667 static inline struct iser_login_desc * 668 iser_login(struct ib_cqe *cqe) 669 { 670 return container_of(cqe, struct iser_login_desc, cqe); 671 } 672 673 #endif 674