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 /* Default support is 512KB I/O size */ 100 #define ISER_DEF_MAX_SECTORS 1024 101 #define ISCSI_ISER_DEF_SG_TABLESIZE \ 102 ((ISER_DEF_MAX_SECTORS * SECTOR_SIZE) >> ilog2(SZ_4K)) 103 /* Maximum support is 16MB I/O size */ 104 #define ISCSI_ISER_MAX_SG_TABLESIZE ((32768 * SECTOR_SIZE) >> ilog2(SZ_4K)) 105 106 #define ISER_DEF_XMIT_CMDS_DEFAULT 512 107 #if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT 108 #define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX 109 #else 110 #define ISER_DEF_XMIT_CMDS_MAX ISER_DEF_XMIT_CMDS_DEFAULT 111 #endif 112 #define ISER_DEF_CMD_PER_LUN ISER_DEF_XMIT_CMDS_MAX 113 114 /* QP settings */ 115 /* Maximal bounds on received asynchronous PDUs */ 116 #define ISER_MAX_RX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */ 117 118 #define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), * 119 * SCSI_TMFUNC(2), LOGOUT(1) */ 120 121 #define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX) 122 123 #define ISER_MIN_POSTED_RX (ISER_DEF_XMIT_CMDS_MAX >> 2) 124 125 /* the max TX (send) WR supported by the iSER QP is defined by * 126 * max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect * 127 * to have at max for SCSI command. The tx posting & completion handling code * 128 * supports -EAGAIN scheme where tx is suspended till the QP has room for more * 129 * send WR. D=8 comes from 64K/8K */ 130 131 #define ISER_INFLIGHT_DATAOUTS 8 132 133 #define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ 134 (1 + ISER_INFLIGHT_DATAOUTS) + \ 135 ISER_MAX_TX_MISC_PDUS + \ 136 ISER_MAX_RX_MISC_PDUS) 137 138 /* Max registration work requests per command */ 139 #define ISER_MAX_REG_WR_PER_CMD 5 140 141 /* For Signature we don't support DATAOUTs so no need to make room for them */ 142 #define ISER_QP_SIG_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ 143 (1 + ISER_MAX_REG_WR_PER_CMD) + \ 144 ISER_MAX_TX_MISC_PDUS + \ 145 ISER_MAX_RX_MISC_PDUS) 146 147 #define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \ 148 - ISER_MAX_TX_MISC_PDUS \ 149 - ISER_MAX_RX_MISC_PDUS) / \ 150 (1 + ISER_INFLIGHT_DATAOUTS)) 151 152 #define ISER_SIGNAL_CMD_COUNT 32 153 154 /* Constant PDU lengths calculations */ 155 #define ISER_HEADERS_LEN (sizeof(struct iser_ctrl) + sizeof(struct iscsi_hdr)) 156 157 #define ISER_RECV_DATA_SEG_LEN 128 158 #define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN) 159 #define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN) 160 161 /* Length of an object name string */ 162 #define ISER_OBJECT_NAME_SIZE 64 163 164 enum iser_conn_state { 165 ISER_CONN_INIT, /* descriptor allocd, no conn */ 166 ISER_CONN_PENDING, /* in the process of being established */ 167 ISER_CONN_UP, /* up and running */ 168 ISER_CONN_TERMINATING, /* in the process of being terminated */ 169 ISER_CONN_DOWN, /* shut down */ 170 ISER_CONN_STATES_NUM 171 }; 172 173 enum iser_task_status { 174 ISER_TASK_STATUS_INIT = 0, 175 ISER_TASK_STATUS_STARTED, 176 ISER_TASK_STATUS_COMPLETED 177 }; 178 179 enum iser_data_dir { 180 ISER_DIR_IN = 0, /* to initiator */ 181 ISER_DIR_OUT, /* from initiator */ 182 ISER_DIRS_NUM 183 }; 184 185 /** 186 * struct iser_data_buf - iSER data buffer 187 * 188 * @sg: pointer to the sg list 189 * @size: num entries of this sg 190 * @data_len: total beffer byte len 191 * @dma_nents: returned by dma_map_sg 192 */ 193 struct iser_data_buf { 194 struct scatterlist *sg; 195 int size; 196 unsigned long data_len; 197 int dma_nents; 198 }; 199 200 /* fwd declarations */ 201 struct iser_device; 202 struct iscsi_iser_task; 203 struct iscsi_endpoint; 204 struct iser_reg_resources; 205 206 /** 207 * struct iser_mem_reg - iSER memory registration info 208 * 209 * @sge: memory region sg element 210 * @rkey: memory region remote key 211 * @mem_h: pointer to registration context (FMR/Fastreg) 212 */ 213 struct iser_mem_reg { 214 struct ib_sge sge; 215 u32 rkey; 216 void *mem_h; 217 }; 218 219 enum iser_desc_type { 220 ISCSI_TX_CONTROL , 221 ISCSI_TX_SCSI_COMMAND, 222 ISCSI_TX_DATAOUT 223 }; 224 225 /** 226 * struct iser_tx_desc - iSER TX descriptor 227 * 228 * @iser_header: iser header 229 * @iscsi_header: iscsi header 230 * @type: command/control/dataout 231 * @dam_addr: header buffer dma_address 232 * @tx_sg: sg[0] points to iser/iscsi headers 233 * sg[1] optionally points to either of immediate data 234 * unsolicited data-out or control 235 * @num_sge: number sges used on this TX task 236 * @mapped: Is the task header mapped 237 * reg_wr: registration WR 238 * send_wr: send WR 239 * inv_wr: invalidate WR 240 */ 241 struct iser_tx_desc { 242 struct iser_ctrl iser_header; 243 struct iscsi_hdr iscsi_header; 244 enum iser_desc_type type; 245 u64 dma_addr; 246 struct ib_sge tx_sg[2]; 247 int num_sge; 248 struct ib_cqe cqe; 249 bool mapped; 250 struct ib_reg_wr reg_wr; 251 struct ib_send_wr send_wr; 252 struct ib_send_wr inv_wr; 253 }; 254 255 #define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \ 256 sizeof(u64) + sizeof(struct ib_sge) + \ 257 sizeof(struct ib_cqe))) 258 /** 259 * struct iser_rx_desc - iSER RX descriptor 260 * 261 * @iser_header: iser header 262 * @iscsi_header: iscsi header 263 * @data: received data segment 264 * @dma_addr: receive buffer dma address 265 * @rx_sg: ib_sge of receive buffer 266 * @pad: for sense data TODO: Modify to maximum sense length supported 267 */ 268 struct iser_rx_desc { 269 struct iser_ctrl iser_header; 270 struct iscsi_hdr iscsi_header; 271 char data[ISER_RECV_DATA_SEG_LEN]; 272 u64 dma_addr; 273 struct ib_sge rx_sg; 274 struct ib_cqe cqe; 275 char pad[ISER_RX_PAD_SIZE]; 276 } __packed; 277 278 /** 279 * struct iser_login_desc - iSER login descriptor 280 * 281 * @req: pointer to login request buffer 282 * @resp: pointer to login response buffer 283 * @req_dma: DMA address of login request buffer 284 * @rsp_dma: DMA address of login response buffer 285 * @sge: IB sge for login post recv 286 * @cqe: completion handler 287 */ 288 struct iser_login_desc { 289 void *req; 290 void *rsp; 291 u64 req_dma; 292 u64 rsp_dma; 293 struct ib_sge sge; 294 struct ib_cqe cqe; 295 } __packed; 296 297 struct iser_conn; 298 struct ib_conn; 299 struct iscsi_iser_task; 300 301 /** 302 * struct iser_comp - iSER completion context 303 * 304 * @cq: completion queue 305 * @active_qps: Number of active QPs attached 306 * to completion context 307 */ 308 struct iser_comp { 309 struct ib_cq *cq; 310 int active_qps; 311 }; 312 313 /** 314 * struct iser_device - Memory registration operations 315 * per-device registration schemes 316 * 317 * @alloc_reg_res: Allocate registration resources 318 * @free_reg_res: Free registration resources 319 * @fast_reg_mem: Register memory buffers 320 * @unreg_mem: Un-register memory buffers 321 * @reg_desc_get: Get a registration descriptor for pool 322 * @reg_desc_put: Get a registration descriptor to pool 323 */ 324 struct iser_reg_ops { 325 int (*alloc_reg_res)(struct ib_conn *ib_conn, 326 unsigned cmds_max, 327 unsigned int size); 328 void (*free_reg_res)(struct ib_conn *ib_conn); 329 int (*reg_mem)(struct iscsi_iser_task *iser_task, 330 struct iser_data_buf *mem, 331 struct iser_reg_resources *rsc, 332 struct iser_mem_reg *reg); 333 void (*unreg_mem)(struct iscsi_iser_task *iser_task, 334 enum iser_data_dir cmd_dir); 335 struct iser_fr_desc * (*reg_desc_get)(struct ib_conn *ib_conn); 336 void (*reg_desc_put)(struct ib_conn *ib_conn, 337 struct iser_fr_desc *desc); 338 }; 339 340 /** 341 * struct iser_device - iSER device handle 342 * 343 * @ib_device: RDMA device 344 * @pd: Protection Domain for this device 345 * @mr: Global DMA memory region 346 * @event_handler: IB events handle routine 347 * @ig_list: entry in devices list 348 * @refcount: Reference counter, dominated by open iser connections 349 * @comps_used: Number of completion contexts used, Min between online 350 * cpus and device max completion vectors 351 * @comps: Dinamically allocated array of completion handlers 352 * @reg_ops: Registration ops 353 * @remote_inv_sup: Remote invalidate is supported on this device 354 */ 355 struct iser_device { 356 struct ib_device *ib_device; 357 struct ib_pd *pd; 358 struct ib_event_handler event_handler; 359 struct list_head ig_list; 360 int refcount; 361 int comps_used; 362 struct iser_comp *comps; 363 const struct iser_reg_ops *reg_ops; 364 bool remote_inv_sup; 365 }; 366 367 /** 368 * struct iser_reg_resources - Fast registration recources 369 * 370 * @mr: memory region 371 * @fmr_pool: pool of fmrs 372 * @sig_mr: signature memory region 373 * @page_vec: fast reg page list used by fmr pool 374 * @mr_valid: is mr valid indicator 375 */ 376 struct iser_reg_resources { 377 union { 378 struct ib_mr *mr; 379 struct ib_fmr_pool *fmr_pool; 380 }; 381 struct ib_mr *sig_mr; 382 struct iser_page_vec *page_vec; 383 u8 mr_valid:1; 384 }; 385 386 /** 387 * struct iser_fr_desc - Fast registration descriptor 388 * 389 * @list: entry in connection fastreg pool 390 * @rsc: data buffer registration resources 391 * @sig_protected: is region protected indicator 392 */ 393 struct iser_fr_desc { 394 struct list_head list; 395 struct iser_reg_resources rsc; 396 bool sig_protected; 397 struct list_head all_list; 398 }; 399 400 /** 401 * struct iser_fr_pool: connection fast registration pool 402 * 403 * @list: list of fastreg descriptors 404 * @lock: protects fmr/fastreg pool 405 * @size: size of the pool 406 */ 407 struct iser_fr_pool { 408 struct list_head list; 409 spinlock_t lock; 410 int size; 411 struct list_head all_list; 412 }; 413 414 /** 415 * struct ib_conn - Infiniband related objects 416 * 417 * @cma_id: rdma_cm connection maneger handle 418 * @qp: Connection Queue-pair 419 * @post_recv_buf_count: post receive counter 420 * @sig_count: send work request signal count 421 * @rx_wr: receive work request for batch posts 422 * @device: reference to iser device 423 * @comp: iser completion context 424 * @fr_pool: connection fast registration poool 425 * @pi_support: Indicate device T10-PI support 426 */ 427 struct ib_conn { 428 struct rdma_cm_id *cma_id; 429 struct ib_qp *qp; 430 int post_recv_buf_count; 431 u8 sig_count; 432 struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; 433 struct iser_device *device; 434 struct iser_comp *comp; 435 struct iser_fr_pool fr_pool; 436 bool pi_support; 437 struct ib_cqe reg_cqe; 438 }; 439 440 /** 441 * struct iser_conn - iSER connection context 442 * 443 * @ib_conn: connection RDMA resources 444 * @iscsi_conn: link to matching iscsi connection 445 * @ep: transport handle 446 * @state: connection logical state 447 * @qp_max_recv_dtos: maximum number of data outs, corresponds 448 * to max number of post recvs 449 * @qp_max_recv_dtos_mask: (qp_max_recv_dtos - 1) 450 * @min_posted_rx: (qp_max_recv_dtos >> 2) 451 * @max_cmds: maximum cmds allowed for this connection 452 * @name: connection peer portal 453 * @release_work: deffered work for release job 454 * @state_mutex: protects iser onnection state 455 * @stop_completion: conn_stop completion 456 * @ib_completion: RDMA cleanup completion 457 * @up_completion: connection establishment completed 458 * (state is ISER_CONN_UP) 459 * @conn_list: entry in ig conn list 460 * @login_desc: login descriptor 461 * @rx_desc_head: head of rx_descs cyclic buffer 462 * @rx_descs: rx buffers array (cyclic buffer) 463 * @num_rx_descs: number of rx descriptors 464 * @scsi_sg_tablesize: scsi host sg_tablesize 465 * @pages_per_mr: maximum pages available for registration 466 */ 467 struct iser_conn { 468 struct ib_conn ib_conn; 469 struct iscsi_conn *iscsi_conn; 470 struct iscsi_endpoint *ep; 471 enum iser_conn_state state; 472 unsigned qp_max_recv_dtos; 473 unsigned qp_max_recv_dtos_mask; 474 unsigned min_posted_rx; 475 u16 max_cmds; 476 char name[ISER_OBJECT_NAME_SIZE]; 477 struct work_struct release_work; 478 struct mutex state_mutex; 479 struct completion stop_completion; 480 struct completion ib_completion; 481 struct completion up_completion; 482 struct list_head conn_list; 483 struct iser_login_desc login_desc; 484 unsigned int rx_desc_head; 485 struct iser_rx_desc *rx_descs; 486 u32 num_rx_descs; 487 unsigned short scsi_sg_tablesize; 488 unsigned short pages_per_mr; 489 bool snd_w_inv; 490 }; 491 492 /** 493 * struct iscsi_iser_task - iser task context 494 * 495 * @desc: TX descriptor 496 * @iser_conn: link to iser connection 497 * @status: current task status 498 * @sc: link to scsi command 499 * @command_sent: indicate if command was sent 500 * @dir: iser data direction 501 * @rdma_reg: task rdma registration desc 502 * @data: iser data buffer desc 503 * @prot: iser protection buffer desc 504 */ 505 struct iscsi_iser_task { 506 struct iser_tx_desc desc; 507 struct iser_conn *iser_conn; 508 enum iser_task_status status; 509 struct scsi_cmnd *sc; 510 int command_sent; 511 int dir[ISER_DIRS_NUM]; 512 struct iser_mem_reg rdma_reg[ISER_DIRS_NUM]; 513 struct iser_data_buf data[ISER_DIRS_NUM]; 514 struct iser_data_buf prot[ISER_DIRS_NUM]; 515 }; 516 517 struct iser_page_vec { 518 u64 *pages; 519 int npages; 520 struct ib_mr fake_mr; 521 }; 522 523 /** 524 * struct iser_global: iSER global context 525 * 526 * @device_list_mutex: protects device_list 527 * @device_list: iser devices global list 528 * @connlist_mutex: protects connlist 529 * @connlist: iser connections global list 530 * @desc_cache: kmem cache for tx dataout 531 */ 532 struct iser_global { 533 struct mutex device_list_mutex; 534 struct list_head device_list; 535 struct mutex connlist_mutex; 536 struct list_head connlist; 537 struct kmem_cache *desc_cache; 538 }; 539 540 extern struct iser_global ig; 541 extern int iser_debug_level; 542 extern bool iser_pi_enable; 543 extern int iser_pi_guard; 544 extern unsigned int iser_max_sectors; 545 extern bool iser_always_reg; 546 547 int iser_assign_reg_ops(struct iser_device *device); 548 549 int iser_send_control(struct iscsi_conn *conn, 550 struct iscsi_task *task); 551 552 int iser_send_command(struct iscsi_conn *conn, 553 struct iscsi_task *task); 554 555 int iser_send_data_out(struct iscsi_conn *conn, 556 struct iscsi_task *task, 557 struct iscsi_data *hdr); 558 559 void iscsi_iser_recv(struct iscsi_conn *conn, 560 struct iscsi_hdr *hdr, 561 char *rx_data, 562 int rx_data_len); 563 564 void iser_conn_init(struct iser_conn *iser_conn); 565 566 void iser_conn_release(struct iser_conn *iser_conn); 567 568 int iser_conn_terminate(struct iser_conn *iser_conn); 569 570 void iser_release_work(struct work_struct *work); 571 572 void iser_err_comp(struct ib_wc *wc, const char *type); 573 void iser_login_rsp(struct ib_cq *cq, struct ib_wc *wc); 574 void iser_task_rsp(struct ib_cq *cq, struct ib_wc *wc); 575 void iser_cmd_comp(struct ib_cq *cq, struct ib_wc *wc); 576 void iser_ctrl_comp(struct ib_cq *cq, struct ib_wc *wc); 577 void iser_dataout_comp(struct ib_cq *cq, struct ib_wc *wc); 578 void iser_reg_comp(struct ib_cq *cq, struct ib_wc *wc); 579 580 void iser_task_rdma_init(struct iscsi_iser_task *task); 581 582 void iser_task_rdma_finalize(struct iscsi_iser_task *task); 583 584 void iser_free_rx_descriptors(struct iser_conn *iser_conn); 585 586 void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, 587 struct iser_data_buf *mem, 588 enum iser_data_dir cmd_dir); 589 590 int iser_reg_rdma_mem(struct iscsi_iser_task *task, 591 enum iser_data_dir dir, 592 bool all_imm); 593 void iser_unreg_rdma_mem(struct iscsi_iser_task *task, 594 enum iser_data_dir dir); 595 596 int iser_connect(struct iser_conn *iser_conn, 597 struct sockaddr *src_addr, 598 struct sockaddr *dst_addr, 599 int non_blocking); 600 601 void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task, 602 enum iser_data_dir cmd_dir); 603 void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task, 604 enum iser_data_dir cmd_dir); 605 606 int iser_post_recvl(struct iser_conn *iser_conn); 607 int iser_post_recvm(struct iser_conn *iser_conn, int count); 608 int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, 609 bool signal); 610 611 int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, 612 struct iser_data_buf *data, 613 enum iser_data_dir iser_dir, 614 enum dma_data_direction dma_dir); 615 616 void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, 617 struct iser_data_buf *data, 618 enum dma_data_direction dir); 619 620 int iser_initialize_task_headers(struct iscsi_task *task, 621 struct iser_tx_desc *tx_desc); 622 int iser_alloc_rx_descriptors(struct iser_conn *iser_conn, 623 struct iscsi_session *session); 624 int iser_alloc_fmr_pool(struct ib_conn *ib_conn, 625 unsigned cmds_max, 626 unsigned int size); 627 void iser_free_fmr_pool(struct ib_conn *ib_conn); 628 int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, 629 unsigned cmds_max, 630 unsigned int size); 631 void iser_free_fastreg_pool(struct ib_conn *ib_conn); 632 u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, 633 enum iser_data_dir cmd_dir, sector_t *sector); 634 struct iser_fr_desc * 635 iser_reg_desc_get_fr(struct ib_conn *ib_conn); 636 void 637 iser_reg_desc_put_fr(struct ib_conn *ib_conn, 638 struct iser_fr_desc *desc); 639 struct iser_fr_desc * 640 iser_reg_desc_get_fmr(struct ib_conn *ib_conn); 641 void 642 iser_reg_desc_put_fmr(struct ib_conn *ib_conn, 643 struct iser_fr_desc *desc); 644 645 static inline struct iser_conn * 646 to_iser_conn(struct ib_conn *ib_conn) 647 { 648 return container_of(ib_conn, struct iser_conn, ib_conn); 649 } 650 651 static inline struct iser_rx_desc * 652 iser_rx(struct ib_cqe *cqe) 653 { 654 return container_of(cqe, struct iser_rx_desc, cqe); 655 } 656 657 static inline struct iser_tx_desc * 658 iser_tx(struct ib_cqe *cqe) 659 { 660 return container_of(cqe, struct iser_tx_desc, cqe); 661 } 662 663 static inline struct iser_login_desc * 664 iser_login(struct ib_cqe *cqe) 665 { 666 return container_of(cqe, struct iser_login_desc, cqe); 667 } 668 669 #endif 670