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