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 52 #include <linux/interrupt.h> 53 #include <linux/wait.h> 54 #include <linux/sched.h> 55 #include <linux/list.h> 56 #include <linux/slab.h> 57 #include <linux/dma-mapping.h> 58 #include <linux/mutex.h> 59 #include <linux/mempool.h> 60 #include <linux/uio.h> 61 62 #include <linux/socket.h> 63 #include <linux/in.h> 64 #include <linux/in6.h> 65 66 #include <rdma/ib_verbs.h> 67 #include <rdma/ib_fmr_pool.h> 68 #include <rdma/rdma_cm.h> 69 70 #define DRV_NAME "iser" 71 #define PFX DRV_NAME ": " 72 #define DRV_VER "1.5" 73 74 #define iser_dbg(fmt, arg...) \ 75 do { \ 76 if (unlikely(iser_debug_level > 2)) \ 77 printk(KERN_DEBUG PFX "%s: " fmt,\ 78 __func__ , ## arg); \ 79 } while (0) 80 81 #define iser_warn(fmt, arg...) \ 82 do { \ 83 if (unlikely(iser_debug_level > 0)) \ 84 pr_warn(PFX "%s: " fmt, \ 85 __func__ , ## arg); \ 86 } while (0) 87 88 #define iser_info(fmt, arg...) \ 89 do { \ 90 if (unlikely(iser_debug_level > 1)) \ 91 pr_info(PFX "%s: " fmt, \ 92 __func__ , ## arg); \ 93 } while (0) 94 95 #define iser_err(fmt, arg...) \ 96 pr_err(PFX "%s: " fmt, __func__ , ## arg) 97 98 #define SHIFT_4K 12 99 #define SIZE_4K (1ULL << SHIFT_4K) 100 #define MASK_4K (~(SIZE_4K-1)) 101 /* support up to 512KB in one RDMA */ 102 #define ISCSI_ISER_SG_TABLESIZE (0x80000 >> SHIFT_4K) 103 #define ISER_DEF_XMIT_CMDS_DEFAULT 512 104 #if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT 105 #define ISER_DEF_XMIT_CMDS_MAX ISCSI_DEF_XMIT_CMDS_MAX 106 #else 107 #define ISER_DEF_XMIT_CMDS_MAX ISER_DEF_XMIT_CMDS_DEFAULT 108 #endif 109 #define ISER_DEF_CMD_PER_LUN ISER_DEF_XMIT_CMDS_MAX 110 111 /* QP settings */ 112 /* Maximal bounds on received asynchronous PDUs */ 113 #define ISER_MAX_RX_MISC_PDUS 4 /* NOOP_IN(2) , ASYNC_EVENT(2) */ 114 115 #define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), * 116 * SCSI_TMFUNC(2), LOGOUT(1) */ 117 118 #define ISER_QP_MAX_RECV_DTOS (ISER_DEF_XMIT_CMDS_MAX) 119 120 #define ISER_MIN_POSTED_RX (ISER_DEF_XMIT_CMDS_MAX >> 2) 121 122 /* the max TX (send) WR supported by the iSER QP is defined by * 123 * max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect * 124 * to have at max for SCSI command. The tx posting & completion handling code * 125 * supports -EAGAIN scheme where tx is suspended till the QP has room for more * 126 * send WR. D=8 comes from 64K/8K */ 127 128 #define ISER_INFLIGHT_DATAOUTS 8 129 130 #define ISER_QP_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ 131 (1 + ISER_INFLIGHT_DATAOUTS) + \ 132 ISER_MAX_TX_MISC_PDUS + \ 133 ISER_MAX_RX_MISC_PDUS) 134 135 /* Max registration work requests per command */ 136 #define ISER_MAX_REG_WR_PER_CMD 5 137 138 /* For Signature we don't support DATAOUTs so no need to make room for them */ 139 #define ISER_QP_SIG_MAX_REQ_DTOS (ISER_DEF_XMIT_CMDS_MAX * \ 140 (1 + ISER_MAX_REG_WR_PER_CMD) + \ 141 ISER_MAX_TX_MISC_PDUS + \ 142 ISER_MAX_RX_MISC_PDUS) 143 144 #define ISER_GET_MAX_XMIT_CMDS(send_wr) ((send_wr \ 145 - ISER_MAX_TX_MISC_PDUS \ 146 - ISER_MAX_RX_MISC_PDUS) / \ 147 (1 + ISER_INFLIGHT_DATAOUTS)) 148 149 #define ISER_WC_BATCH_COUNT 16 150 #define ISER_SIGNAL_CMD_COUNT 32 151 152 #define ISER_VER 0x10 153 #define ISER_WSV 0x08 154 #define ISER_RSV 0x04 155 156 #define ISER_FASTREG_LI_WRID 0xffffffffffffffffULL 157 #define ISER_BEACON_WRID 0xfffffffffffffffeULL 158 159 /** 160 * struct iser_hdr - iSER header 161 * 162 * @flags: flags support (zbva, remote_inv) 163 * @rsvd: reserved 164 * @write_stag: write rkey 165 * @write_va: write virtual address 166 * @reaf_stag: read rkey 167 * @read_va: read virtual address 168 */ 169 struct iser_hdr { 170 u8 flags; 171 u8 rsvd[3]; 172 __be32 write_stag; 173 __be64 write_va; 174 __be32 read_stag; 175 __be64 read_va; 176 } __attribute__((packed)); 177 178 179 #define ISER_ZBVA_NOT_SUPPORTED 0x80 180 #define ISER_SEND_W_INV_NOT_SUPPORTED 0x40 181 182 struct iser_cm_hdr { 183 u8 flags; 184 u8 rsvd[3]; 185 } __packed; 186 187 /* Constant PDU lengths calculations */ 188 #define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr)) 189 190 #define ISER_RECV_DATA_SEG_LEN 128 191 #define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN) 192 #define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN) 193 194 /* Length of an object name string */ 195 #define ISER_OBJECT_NAME_SIZE 64 196 197 enum iser_conn_state { 198 ISER_CONN_INIT, /* descriptor allocd, no conn */ 199 ISER_CONN_PENDING, /* in the process of being established */ 200 ISER_CONN_UP, /* up and running */ 201 ISER_CONN_TERMINATING, /* in the process of being terminated */ 202 ISER_CONN_DOWN, /* shut down */ 203 ISER_CONN_STATES_NUM 204 }; 205 206 enum iser_task_status { 207 ISER_TASK_STATUS_INIT = 0, 208 ISER_TASK_STATUS_STARTED, 209 ISER_TASK_STATUS_COMPLETED 210 }; 211 212 enum iser_data_dir { 213 ISER_DIR_IN = 0, /* to initiator */ 214 ISER_DIR_OUT, /* from initiator */ 215 ISER_DIRS_NUM 216 }; 217 218 /** 219 * struct iser_data_buf - iSER data buffer 220 * 221 * @buf: pointer to the sg list 222 * @size: num entries of this sg 223 * @data_len: total beffer byte len 224 * @dma_nents: returned by dma_map_sg 225 * @copy_buf: allocated copy buf for SGs unaligned 226 * for rdma which are copied 227 * @sg_single: SG-ified clone of a non SG SC or 228 * unaligned SG 229 */ 230 struct iser_data_buf { 231 void *buf; 232 unsigned int size; 233 unsigned long data_len; 234 unsigned int dma_nents; 235 char *copy_buf; 236 struct scatterlist sg_single; 237 }; 238 239 /* fwd declarations */ 240 struct iser_device; 241 struct iscsi_iser_task; 242 struct iscsi_endpoint; 243 244 /** 245 * struct iser_mem_reg - iSER memory registration info 246 * 247 * @lkey: MR local key 248 * @rkey: MR remote key 249 * @va: MR start address (buffer va) 250 * @len: MR length 251 * @mem_h: pointer to registration context (FMR/Fastreg) 252 */ 253 struct iser_mem_reg { 254 u32 lkey; 255 u32 rkey; 256 u64 va; 257 u64 len; 258 void *mem_h; 259 }; 260 261 /** 262 * struct iser_regd_buf - iSER buffer registration desc 263 * 264 * @reg: memory registration info 265 * @virt_addr: virtual address of buffer 266 * @device: reference to iser device 267 * @direction: dma direction (for dma_unmap) 268 * @data_size: data buffer size in bytes 269 */ 270 struct iser_regd_buf { 271 struct iser_mem_reg reg; 272 void *virt_addr; 273 struct iser_device *device; 274 enum dma_data_direction direction; 275 unsigned int data_size; 276 }; 277 278 enum iser_desc_type { 279 ISCSI_TX_CONTROL , 280 ISCSI_TX_SCSI_COMMAND, 281 ISCSI_TX_DATAOUT 282 }; 283 284 /** 285 * struct iser_tx_desc - iSER TX descriptor (for send wr_id) 286 * 287 * @iser_header: iser header 288 * @iscsi_header: iscsi header 289 * @type: command/control/dataout 290 * @dam_addr: header buffer dma_address 291 * @tx_sg: sg[0] points to iser/iscsi headers 292 * sg[1] optionally points to either of immediate data 293 * unsolicited data-out or control 294 * @num_sge: number sges used on this TX task 295 */ 296 struct iser_tx_desc { 297 struct iser_hdr iser_header; 298 struct iscsi_hdr iscsi_header; 299 enum iser_desc_type type; 300 u64 dma_addr; 301 struct ib_sge tx_sg[2]; 302 int num_sge; 303 }; 304 305 #define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \ 306 sizeof(u64) + sizeof(struct ib_sge))) 307 /** 308 * struct iser_rx_desc - iSER RX descriptor (for recv wr_id) 309 * 310 * @iser_header: iser header 311 * @iscsi_header: iscsi header 312 * @data: received data segment 313 * @dma_addr: receive buffer dma address 314 * @rx_sg: ib_sge of receive buffer 315 * @pad: for sense data TODO: Modify to maximum sense length supported 316 */ 317 struct iser_rx_desc { 318 struct iser_hdr iser_header; 319 struct iscsi_hdr iscsi_header; 320 char data[ISER_RECV_DATA_SEG_LEN]; 321 u64 dma_addr; 322 struct ib_sge rx_sg; 323 char pad[ISER_RX_PAD_SIZE]; 324 } __attribute__((packed)); 325 326 struct iser_conn; 327 struct ib_conn; 328 struct iscsi_iser_task; 329 330 /** 331 * struct iser_comp - iSER completion context 332 * 333 * @device: pointer to device handle 334 * @cq: completion queue 335 * @wcs: work completion array 336 * @tasklet: Tasklet handle 337 * @active_qps: Number of active QPs attached 338 * to completion context 339 */ 340 struct iser_comp { 341 struct iser_device *device; 342 struct ib_cq *cq; 343 struct ib_wc wcs[ISER_WC_BATCH_COUNT]; 344 struct tasklet_struct tasklet; 345 int active_qps; 346 }; 347 348 /** 349 * struct iser_device - iSER device handle 350 * 351 * @ib_device: RDMA device 352 * @pd: Protection Domain for this device 353 * @dev_attr: Device attributes container 354 * @mr: Global DMA memory region 355 * @event_handler: IB events handle routine 356 * @ig_list: entry in devices list 357 * @refcount: Reference counter, dominated by open iser connections 358 * @comps_used: Number of completion contexts used, Min between online 359 * cpus and device max completion vectors 360 * @comps: Dinamically allocated array of completion handlers 361 * Memory registration pool Function pointers (FMR or Fastreg): 362 * @iser_alloc_rdma_reg_res: Allocation of memory regions pool 363 * @iser_free_rdma_reg_res: Free of memory regions pool 364 * @iser_reg_rdma_mem: Memory registration routine 365 * @iser_unreg_rdma_mem: Memory deregistration routine 366 */ 367 struct iser_device { 368 struct ib_device *ib_device; 369 struct ib_pd *pd; 370 struct ib_device_attr dev_attr; 371 struct ib_mr *mr; 372 struct ib_event_handler event_handler; 373 struct list_head ig_list; 374 int refcount; 375 int comps_used; 376 struct iser_comp *comps; 377 int (*iser_alloc_rdma_reg_res)(struct ib_conn *ib_conn, 378 unsigned cmds_max); 379 void (*iser_free_rdma_reg_res)(struct ib_conn *ib_conn); 380 int (*iser_reg_rdma_mem)(struct iscsi_iser_task *iser_task, 381 enum iser_data_dir cmd_dir); 382 void (*iser_unreg_rdma_mem)(struct iscsi_iser_task *iser_task, 383 enum iser_data_dir cmd_dir); 384 }; 385 386 #define ISER_CHECK_GUARD 0xc0 387 #define ISER_CHECK_REFTAG 0x0f 388 #define ISER_CHECK_APPTAG 0x30 389 390 enum iser_reg_indicator { 391 ISER_DATA_KEY_VALID = 1 << 0, 392 ISER_PROT_KEY_VALID = 1 << 1, 393 ISER_SIG_KEY_VALID = 1 << 2, 394 ISER_FASTREG_PROTECTED = 1 << 3, 395 }; 396 397 /** 398 * struct iser_pi_context - Protection information context 399 * 400 * @prot_mr: protection memory region 401 * @prot_frpl: protection fastreg page list 402 * @sig_mr: signature feature enabled memory region 403 */ 404 struct iser_pi_context { 405 struct ib_mr *prot_mr; 406 struct ib_fast_reg_page_list *prot_frpl; 407 struct ib_mr *sig_mr; 408 }; 409 410 /** 411 * struct fast_reg_descriptor - Fast registration descriptor 412 * 413 * @list: entry in connection fastreg pool 414 * @data_mr: data memory region 415 * @data_frpl: data fastreg page list 416 * @pi_ctx: protection information context 417 * @reg_indicators: fast registration indicators 418 */ 419 struct fast_reg_descriptor { 420 struct list_head list; 421 struct ib_mr *data_mr; 422 struct ib_fast_reg_page_list *data_frpl; 423 struct iser_pi_context *pi_ctx; 424 u8 reg_indicators; 425 }; 426 427 /** 428 * struct ib_conn - Infiniband related objects 429 * 430 * @cma_id: rdma_cm connection maneger handle 431 * @qp: Connection Queue-pair 432 * @post_recv_buf_count: post receive counter 433 * @sig_count: send work request signal count 434 * @rx_wr: receive work request for batch posts 435 * @device: reference to iser device 436 * @comp: iser completion context 437 * @pi_support: Indicate device T10-PI support 438 * @beacon: beacon send wr to signal all flush errors were drained 439 * @flush_comp: completes when all connection completions consumed 440 * @lock: protects fmr/fastreg pool 441 * @union.fmr: 442 * @pool: FMR pool for fast registrations 443 * @page_vec: page vector to hold mapped commands pages 444 * used for registration 445 * @union.fastreg: 446 * @pool: Fast registration descriptors pool for fast 447 * registrations 448 * @pool_size: Size of pool 449 */ 450 struct ib_conn { 451 struct rdma_cm_id *cma_id; 452 struct ib_qp *qp; 453 int post_recv_buf_count; 454 u8 sig_count; 455 struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX]; 456 struct iser_device *device; 457 struct iser_comp *comp; 458 bool pi_support; 459 struct ib_send_wr beacon; 460 struct completion flush_comp; 461 spinlock_t lock; 462 union { 463 struct { 464 struct ib_fmr_pool *pool; 465 struct iser_page_vec *page_vec; 466 } fmr; 467 struct { 468 struct list_head pool; 469 int pool_size; 470 } fastreg; 471 }; 472 }; 473 474 /** 475 * struct iser_conn - iSER connection context 476 * 477 * @ib_conn: connection RDMA resources 478 * @iscsi_conn: link to matching iscsi connection 479 * @ep: transport handle 480 * @state: connection logical state 481 * @qp_max_recv_dtos: maximum number of data outs, corresponds 482 * to max number of post recvs 483 * @qp_max_recv_dtos_mask: (qp_max_recv_dtos - 1) 484 * @min_posted_rx: (qp_max_recv_dtos >> 2) 485 * @max_cmds: maximum cmds allowed for this connection 486 * @name: connection peer portal 487 * @release_work: deffered work for release job 488 * @state_mutex: protects iser onnection state 489 * @stop_completion: conn_stop completion 490 * @ib_completion: RDMA cleanup completion 491 * @up_completion: connection establishment completed 492 * (state is ISER_CONN_UP) 493 * @conn_list: entry in ig conn list 494 * @login_buf: login data buffer (stores login parameters) 495 * @login_req_buf: login request buffer 496 * @login_req_dma: login request buffer dma address 497 * @login_resp_buf: login response buffer 498 * @login_resp_dma: login response buffer dma address 499 * @rx_desc_head: head of rx_descs cyclic buffer 500 * @rx_descs: rx buffers array (cyclic buffer) 501 * @num_rx_descs: number of rx descriptors 502 */ 503 struct iser_conn { 504 struct ib_conn ib_conn; 505 struct iscsi_conn *iscsi_conn; 506 struct iscsi_endpoint *ep; 507 enum iser_conn_state state; 508 unsigned qp_max_recv_dtos; 509 unsigned qp_max_recv_dtos_mask; 510 unsigned min_posted_rx; 511 u16 max_cmds; 512 char name[ISER_OBJECT_NAME_SIZE]; 513 struct work_struct release_work; 514 struct mutex state_mutex; 515 struct completion stop_completion; 516 struct completion ib_completion; 517 struct completion up_completion; 518 struct list_head conn_list; 519 520 char *login_buf; 521 char *login_req_buf, *login_resp_buf; 522 u64 login_req_dma, login_resp_dma; 523 unsigned int rx_desc_head; 524 struct iser_rx_desc *rx_descs; 525 u32 num_rx_descs; 526 }; 527 528 /** 529 * struct iscsi_iser_task - iser task context 530 * 531 * @desc: TX descriptor 532 * @iser_conn: link to iser connection 533 * @status: current task status 534 * @sc: link to scsi command 535 * @command_sent: indicate if command was sent 536 * @dir: iser data direction 537 * @rdma_regd: task rdma registration desc 538 * @data: iser data buffer desc 539 * @data_copy: iser data copy buffer desc (bounce buffer) 540 * @prot: iser protection buffer desc 541 * @prot_copy: iser protection copy buffer desc (bounce buffer) 542 */ 543 struct iscsi_iser_task { 544 struct iser_tx_desc desc; 545 struct iser_conn *iser_conn; 546 enum iser_task_status status; 547 struct scsi_cmnd *sc; 548 int command_sent; 549 int dir[ISER_DIRS_NUM]; 550 struct iser_regd_buf rdma_regd[ISER_DIRS_NUM]; 551 struct iser_data_buf data[ISER_DIRS_NUM]; 552 struct iser_data_buf data_copy[ISER_DIRS_NUM]; 553 struct iser_data_buf prot[ISER_DIRS_NUM]; 554 struct iser_data_buf prot_copy[ISER_DIRS_NUM]; 555 }; 556 557 struct iser_page_vec { 558 u64 *pages; 559 int length; 560 int offset; 561 int data_size; 562 }; 563 564 /** 565 * struct iser_global: iSER global context 566 * 567 * @device_list_mutex: protects device_list 568 * @device_list: iser devices global list 569 * @connlist_mutex: protects connlist 570 * @connlist: iser connections global list 571 * @desc_cache: kmem cache for tx dataout 572 */ 573 struct iser_global { 574 struct mutex device_list_mutex; 575 struct list_head device_list; 576 struct mutex connlist_mutex; 577 struct list_head connlist; 578 struct kmem_cache *desc_cache; 579 }; 580 581 extern struct iser_global ig; 582 extern int iser_debug_level; 583 extern bool iser_pi_enable; 584 extern int iser_pi_guard; 585 586 int iser_send_control(struct iscsi_conn *conn, 587 struct iscsi_task *task); 588 589 int iser_send_command(struct iscsi_conn *conn, 590 struct iscsi_task *task); 591 592 int iser_send_data_out(struct iscsi_conn *conn, 593 struct iscsi_task *task, 594 struct iscsi_data *hdr); 595 596 void iscsi_iser_recv(struct iscsi_conn *conn, 597 struct iscsi_hdr *hdr, 598 char *rx_data, 599 int rx_data_len); 600 601 void iser_conn_init(struct iser_conn *iser_conn); 602 603 void iser_conn_release(struct iser_conn *iser_conn); 604 605 int iser_conn_terminate(struct iser_conn *iser_conn); 606 607 void iser_release_work(struct work_struct *work); 608 609 void iser_rcv_completion(struct iser_rx_desc *desc, 610 unsigned long dto_xfer_len, 611 struct ib_conn *ib_conn); 612 613 void iser_snd_completion(struct iser_tx_desc *desc, 614 struct ib_conn *ib_conn); 615 616 void iser_task_rdma_init(struct iscsi_iser_task *task); 617 618 void iser_task_rdma_finalize(struct iscsi_iser_task *task); 619 620 void iser_free_rx_descriptors(struct iser_conn *iser_conn); 621 622 void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *iser_task, 623 struct iser_data_buf *mem, 624 struct iser_data_buf *mem_copy, 625 enum iser_data_dir cmd_dir); 626 627 int iser_reg_rdma_mem_fmr(struct iscsi_iser_task *task, 628 enum iser_data_dir cmd_dir); 629 int iser_reg_rdma_mem_fastreg(struct iscsi_iser_task *task, 630 enum iser_data_dir cmd_dir); 631 632 int iser_connect(struct iser_conn *iser_conn, 633 struct sockaddr *src_addr, 634 struct sockaddr *dst_addr, 635 int non_blocking); 636 637 int iser_reg_page_vec(struct ib_conn *ib_conn, 638 struct iser_page_vec *page_vec, 639 struct iser_mem_reg *mem_reg); 640 641 void iser_unreg_mem_fmr(struct iscsi_iser_task *iser_task, 642 enum iser_data_dir cmd_dir); 643 void iser_unreg_mem_fastreg(struct iscsi_iser_task *iser_task, 644 enum iser_data_dir cmd_dir); 645 646 int iser_post_recvl(struct iser_conn *iser_conn); 647 int iser_post_recvm(struct iser_conn *iser_conn, int count); 648 int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc, 649 bool signal); 650 651 int iser_dma_map_task_data(struct iscsi_iser_task *iser_task, 652 struct iser_data_buf *data, 653 enum iser_data_dir iser_dir, 654 enum dma_data_direction dma_dir); 655 656 void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task, 657 struct iser_data_buf *data, 658 enum dma_data_direction dir); 659 660 int iser_initialize_task_headers(struct iscsi_task *task, 661 struct iser_tx_desc *tx_desc); 662 int iser_alloc_rx_descriptors(struct iser_conn *iser_conn, 663 struct iscsi_session *session); 664 int iser_create_fmr_pool(struct ib_conn *ib_conn, unsigned cmds_max); 665 void iser_free_fmr_pool(struct ib_conn *ib_conn); 666 int iser_create_fastreg_pool(struct ib_conn *ib_conn, unsigned cmds_max); 667 void iser_free_fastreg_pool(struct ib_conn *ib_conn); 668 u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task, 669 enum iser_data_dir cmd_dir, sector_t *sector); 670 #endif 671