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 unsigned 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 /* 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 7 235 236 /** 237 * struct iser_tx_desc - iSER TX descriptor 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 247 * @mapped: Is the task header mapped 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 253 */ 254 struct iser_tx_desc { 255 struct iser_ctrl iser_header; 256 struct iscsi_hdr iscsi_header; 257 enum iser_desc_type type; 258 u64 dma_addr; 259 struct ib_sge tx_sg[2]; 260 int num_sge; 261 struct ib_cqe cqe; 262 bool mapped; 263 u8 wr_idx; 264 union iser_wr { 265 struct ib_send_wr send; 266 struct ib_reg_wr fast_reg; 267 struct ib_sig_handover_wr sig; 268 } wrs[ISER_MAX_WRS]; 269 struct iser_mem_reg data_reg; 270 struct iser_mem_reg prot_reg; 271 struct ib_sig_attrs sig_attrs; 272 }; 273 274 #define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \ 275 sizeof(u64) + sizeof(struct ib_sge) + \ 276 sizeof(struct ib_cqe))) 277 /** 278 * struct iser_rx_desc - iSER RX descriptor 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 */ 287 struct iser_rx_desc { 288 struct iser_ctrl iser_header; 289 struct iscsi_hdr iscsi_header; 290 char data[ISER_RECV_DATA_SEG_LEN]; 291 u64 dma_addr; 292 struct ib_sge rx_sg; 293 struct ib_cqe cqe; 294 char pad[ISER_RX_PAD_SIZE]; 295 } __packed; 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 305 * @cqe: completion handler 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; 313 struct ib_cqe cqe; 314 } __attribute__((packed)); 315 316 struct iser_conn; 317 struct ib_conn; 318 struct iscsi_iser_task; 319 320 /** 321 * struct iser_comp - iSER completion context 322 * 323 * @cq: completion queue 324 * @active_qps: Number of active QPs attached 325 * to completion context 326 */ 327 struct iser_comp { 328 struct ib_cq *cq; 329 int active_qps; 330 }; 331 332 /** 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 338 * @fast_reg_mem: Register memory buffers 339 * @unreg_mem: Un-register memory buffers 340 * @reg_desc_get: Get a registration descriptor for pool 341 * @reg_desc_put: Get a registration descriptor to pool 342 */ 343 struct iser_reg_ops { 344 int (*alloc_reg_res)(struct ib_conn *ib_conn, 345 unsigned cmds_max, 346 unsigned int size); 347 void (*free_reg_res)(struct ib_conn *ib_conn); 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); 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); 357 }; 358 359 /** 360 * struct iser_device - iSER device handle 361 * 362 * @ib_device: RDMA device 363 * @pd: Protection Domain for this device 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 371 * @reg_ops: Registration ops 372 * @remote_inv_sup: Remote invalidate is supported on this device 373 */ 374 struct iser_device { 375 struct ib_device *ib_device; 376 struct ib_pd *pd; 377 struct ib_event_handler event_handler; 378 struct list_head ig_list; 379 int refcount; 380 int comps_used; 381 struct iser_comp *comps; 382 const struct iser_reg_ops *reg_ops; 383 bool remote_inv_sup; 384 }; 385 386 #define ISER_CHECK_GUARD 0xc0 387 #define ISER_CHECK_REFTAG 0x0f 388 #define ISER_CHECK_APPTAG 0x30 389 390 /** 391 * struct iser_reg_resources - Fast registration recources 392 * 393 * @mr: memory region 394 * @fmr_pool: pool of fmrs 395 * @page_vec: fast reg page list used by fmr pool 396 * @mr_valid: is mr valid indicator 397 */ 398 struct iser_reg_resources { 399 union { 400 struct ib_mr *mr; 401 struct ib_fmr_pool *fmr_pool; 402 }; 403 struct iser_page_vec *page_vec; 404 u8 mr_valid:1; 405 }; 406 407 /** 408 * struct iser_pi_context - Protection information context 409 * 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 414 */ 415 struct iser_pi_context { 416 struct iser_reg_resources rsc; 417 struct ib_mr *sig_mr; 418 u8 sig_mr_valid:1; 419 u8 sig_protected:1; 420 }; 421 422 /** 423 * struct iser_fr_desc - Fast registration descriptor 424 * 425 * @list: entry in connection fastreg pool 426 * @rsc: data buffer registration resources 427 * @pi_ctx: protection information context 428 */ 429 struct iser_fr_desc { 430 struct list_head list; 431 struct iser_reg_resources rsc; 432 struct iser_pi_context *pi_ctx; 433 struct list_head all_list; 434 }; 435 436 /** 437 * struct iser_fr_pool: connection fast registration pool 438 * 439 * @list: list of fastreg descriptors 440 * @lock: protects fmr/fastreg pool 441 * @size: size of the pool 442 */ 443 struct iser_fr_pool { 444 struct list_head list; 445 spinlock_t lock; 446 int size; 447 struct list_head all_list; 448 }; 449 450 /** 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 456 * @sig_count: send work request signal count 457 * @rx_wr: receive work request for batch posts 458 * @device: reference to iser device 459 * @comp: iser completion context 460 * @fr_pool: connection fast registration poool 461 * @pi_support: Indicate device T10-PI support 462 */ 463 struct ib_conn { 464 struct rdma_cm_id *cma_id; 465 struct ib_qp *qp; 466 int post_recv_buf_count; 467 u8 sig_count; 468 struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; 469 struct iser_device *device; 470 struct iser_comp *comp; 471 struct iser_fr_pool fr_pool; 472 bool pi_support; 473 struct ib_cqe reg_cqe; 474 }; 475 476 /** 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) 487 * @max_cmds: maximum cmds allowed for this connection 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 496 * @login_desc: login descriptor 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 500 * @scsi_sg_tablesize: scsi host sg_tablesize 501 */ 502 struct iser_conn { 503 struct ib_conn ib_conn; 504 struct iscsi_conn *iscsi_conn; 505 struct iscsi_endpoint *ep; 506 enum iser_conn_state state; 507 unsigned qp_max_recv_dtos; 508 unsigned qp_max_recv_dtos_mask; 509 unsigned min_posted_rx; 510 u16 max_cmds; 511 char name[ISER_OBJECT_NAME_SIZE]; 512 struct work_struct release_work; 513 struct mutex state_mutex; 514 struct completion stop_completion; 515 struct completion ib_completion; 516 struct completion up_completion; 517 struct list_head conn_list; 518 struct iser_login_desc login_desc; 519 unsigned int rx_desc_head; 520 struct iser_rx_desc *rx_descs; 521 u32 num_rx_descs; 522 unsigned short scsi_sg_tablesize; 523 bool snd_w_inv; 524 }; 525 526 /** 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 535 * @rdma_reg: task rdma registration desc 536 * @data: iser data buffer desc 537 * @prot: iser protection buffer desc 538 */ 539 struct iscsi_iser_task { 540 struct iser_tx_desc desc; 541 struct iser_conn *iser_conn; 542 enum iser_task_status status; 543 struct scsi_cmnd *sc; 544 int command_sent; 545 int dir[ISER_DIRS_NUM]; 546 struct iser_mem_reg rdma_reg[ISER_DIRS_NUM]; 547 struct iser_data_buf data[ISER_DIRS_NUM]; 548 struct iser_data_buf prot[ISER_DIRS_NUM]; 549 }; 550 551 struct iser_page_vec { 552 u64 *pages; 553 int npages; 554 struct ib_mr fake_mr; 555 }; 556 557 /** 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 */ 566 struct iser_global { 567 struct mutex device_list_mutex; 568 struct list_head device_list; 569 struct mutex connlist_mutex; 570 struct list_head connlist; 571 struct kmem_cache *desc_cache; 572 }; 573 574 extern struct iser_global ig; 575 extern int iser_debug_level; 576 extern bool iser_pi_enable; 577 extern int iser_pi_guard; 578 extern unsigned int iser_max_sectors; 579 extern bool iser_always_reg; 580 581 int iser_assign_reg_ops(struct iser_device *device); 582 583 int iser_send_control(struct iscsi_conn *conn, 584 struct iscsi_task *task); 585 586 int iser_send_command(struct iscsi_conn *conn, 587 struct iscsi_task *task); 588 589 int iser_send_data_out(struct iscsi_conn *conn, 590 struct iscsi_task *task, 591 struct iscsi_data *hdr); 592 593 void iscsi_iser_recv(struct iscsi_conn *conn, 594 struct iscsi_hdr *hdr, 595 char *rx_data, 596 int rx_data_len); 597 598 void iser_conn_init(struct iser_conn *iser_conn); 599 600 void iser_conn_release(struct iser_conn *iser_conn); 601 602 int iser_conn_terminate(struct iser_conn *iser_conn); 603 604 void iser_release_work(struct work_struct *work); 605 606 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); 613 614 void iser_task_rdma_init(struct iscsi_iser_task *task); 615 616 void iser_task_rdma_finalize(struct iscsi_iser_task *task); 617 618 void iser_free_rx_descriptors(struct iser_conn *iser_conn); 619 620 void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, 621 struct iser_data_buf *mem, 622 enum iser_data_dir cmd_dir); 623 624 int iser_reg_rdma_mem(struct iscsi_iser_task *task, 625 enum iser_data_dir dir, 626 bool all_imm); 627 void iser_unreg_rdma_mem(struct iscsi_iser_task *task, 628 enum iser_data_dir dir); 629 630 int iser_connect(struct iser_conn *iser_conn, 631 struct sockaddr *src_addr, 632 struct sockaddr *dst_addr, 633 int non_blocking); 634 635 void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task, 636 enum iser_data_dir cmd_dir); 637 void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task, 638 enum iser_data_dir cmd_dir); 639 640 int iser_post_recvl(struct iser_conn *iser_conn); 641 int iser_post_recvm(struct iser_conn *iser_conn, int count); 642 int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, 643 bool signal); 644 645 int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, 646 struct iser_data_buf *data, 647 enum iser_data_dir iser_dir, 648 enum dma_data_direction dma_dir); 649 650 void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, 651 struct iser_data_buf *data, 652 enum dma_data_direction dir); 653 654 int iser_initialize_task_headers(struct iscsi_task *task, 655 struct iser_tx_desc *tx_desc); 656 int iser_alloc_rx_descriptors(struct iser_conn *iser_conn, 657 struct iscsi_session *session); 658 int iser_alloc_fmr_pool(struct ib_conn *ib_conn, 659 unsigned cmds_max, 660 unsigned int size); 661 void iser_free_fmr_pool(struct ib_conn *ib_conn); 662 int iser_alloc_fastreg_pool(struct ib_conn *ib_conn, 663 unsigned cmds_max, 664 unsigned int size); 665 void iser_free_fastreg_pool(struct ib_conn *ib_conn); 666 u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, 667 enum iser_data_dir cmd_dir, sector_t *sector); 668 struct iser_fr_desc * 669 iser_reg_desc_get_fr(struct ib_conn *ib_conn); 670 void 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); 678 679 static inline struct ib_send_wr * 680 iser_tx_next_wr(struct iser_tx_desc *tx_desc) 681 { 682 struct ib_send_wr *cur_wr = &tx_desc->wrs[tx_desc->wr_idx].send; 683 struct ib_send_wr *last_wr; 684 685 if (tx_desc->wr_idx) { 686 last_wr = &tx_desc->wrs[tx_desc->wr_idx - 1].send; 687 last_wr->next = cur_wr; 688 } 689 tx_desc->wr_idx++; 690 691 return cur_wr; 692 } 693 694 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 } 699 700 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 } 717 718 #endif 719