1 /* bnx2i.h: Broadcom NetXtreme II iSCSI driver. 2 * 3 * Copyright (c) 2006 - 2009 Broadcom Corporation 4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. 5 * Copyright (c) 2007, 2008 Mike Christie 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation. 10 * 11 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) 12 */ 13 14 #ifndef _BNX2I_H_ 15 #define _BNX2I_H_ 16 17 #include <linux/module.h> 18 #include <linux/moduleparam.h> 19 20 #include <linux/errno.h> 21 #include <linux/pci.h> 22 #include <linux/spinlock.h> 23 #include <linux/interrupt.h> 24 #include <linux/sched.h> 25 #include <linux/in.h> 26 #include <linux/kfifo.h> 27 #include <linux/netdevice.h> 28 #include <linux/completion.h> 29 30 #include <scsi/scsi_cmnd.h> 31 #include <scsi/scsi_device.h> 32 #include <scsi/scsi_eh.h> 33 #include <scsi/scsi_host.h> 34 #include <scsi/scsi.h> 35 #include <scsi/iscsi_proto.h> 36 #include <scsi/libiscsi.h> 37 #include <scsi/scsi_transport_iscsi.h> 38 39 #include "../../net/cnic_if.h" 40 #include "57xx_iscsi_hsi.h" 41 #include "57xx_iscsi_constants.h" 42 43 #define BNX2_ISCSI_DRIVER_NAME "bnx2i" 44 45 #define BNX2I_MAX_ADAPTERS 8 46 47 #define ISCSI_MAX_CONNS_PER_HBA 128 48 #define ISCSI_MAX_SESS_PER_HBA ISCSI_MAX_CONNS_PER_HBA 49 #define ISCSI_MAX_CMDS_PER_SESS 128 50 51 /* Total active commands across all connections supported by devices */ 52 #define ISCSI_MAX_CMDS_PER_HBA_5708 (28 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 53 #define ISCSI_MAX_CMDS_PER_HBA_5709 (128 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 54 #define ISCSI_MAX_CMDS_PER_HBA_57710 (256 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 55 56 #define ISCSI_MAX_BDS_PER_CMD 32 57 58 #define MAX_PAGES_PER_CTRL_STRUCT_POOL 8 59 #define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS 4 60 61 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */ 62 #define MAX_BD_LENGTH 65535 63 #define BD_SPLIT_SIZE 32768 64 65 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */ 66 #define BNX2I_SQ_WQES_MIN 16 67 #define BNX2I_570X_SQ_WQES_MAX 128 68 #define BNX2I_5770X_SQ_WQES_MAX 512 69 #define BNX2I_570X_SQ_WQES_DEFAULT 128 70 #define BNX2I_5770X_SQ_WQES_DEFAULT 256 71 72 #define BNX2I_570X_CQ_WQES_MAX 128 73 #define BNX2I_5770X_CQ_WQES_MAX 512 74 75 #define BNX2I_RQ_WQES_MIN 16 76 #define BNX2I_RQ_WQES_MAX 32 77 #define BNX2I_RQ_WQES_DEFAULT 16 78 79 /* CCELLs per conn */ 80 #define BNX2I_CCELLS_MIN 16 81 #define BNX2I_CCELLS_MAX 96 82 #define BNX2I_CCELLS_DEFAULT 64 83 84 #define ITT_INVALID_SIGNATURE 0xFFFF 85 86 #define ISCSI_CMD_CLEANUP_TIMEOUT 100 87 88 #define BNX2I_CONN_CTX_BUF_SIZE 16384 89 90 #define BNX2I_SQ_WQE_SIZE 64 91 #define BNX2I_RQ_WQE_SIZE 256 92 #define BNX2I_CQE_SIZE 64 93 94 #define MB_KERNEL_CTX_SHIFT 8 95 #define MB_KERNEL_CTX_SIZE (1 << MB_KERNEL_CTX_SHIFT) 96 97 #define CTX_SHIFT 7 98 #define GET_CID_NUM(cid_addr) ((cid_addr) >> CTX_SHIFT) 99 100 #define CTX_OFFSET 0x10000 101 #define MAX_CID_CNT 0x4000 102 103 /* 5709 context registers */ 104 #define BNX2_MQ_CONFIG2 0x00003d00 105 #define BNX2_MQ_CONFIG2_CONT_SZ (0x7L<<4) 106 #define BNX2_MQ_CONFIG2_FIRST_L4L5 (0x1fL<<8) 107 108 /* 57710's BAR2 is mapped to doorbell registers */ 109 #define BNX2X_DOORBELL_PCI_BAR 2 110 #define BNX2X_MAX_CQS 8 111 112 #define CNIC_ARM_CQE 1 113 #define CNIC_DISARM_CQE 0 114 115 #define REG_RD(__hba, offset) \ 116 readl(__hba->regview + offset) 117 #define REG_WR(__hba, offset, val) \ 118 writel(val, __hba->regview + offset) 119 120 121 /** 122 * struct generic_pdu_resc - login pdu resource structure 123 * 124 * @req_buf: driver buffer used to stage payload associated with 125 * the login request 126 * @req_dma_addr: dma address for iscsi login request payload buffer 127 * @req_buf_size: actual login request payload length 128 * @req_wr_ptr: pointer into login request buffer when next data is 129 * to be written 130 * @resp_hdr: iscsi header where iscsi login response header is to 131 * be recreated 132 * @resp_buf: buffer to stage login response payload 133 * @resp_dma_addr: login response payload buffer dma address 134 * @resp_buf_size: login response paylod length 135 * @resp_wr_ptr: pointer into login response buffer when next data is 136 * to be written 137 * @req_bd_tbl: iscsi login request payload BD table 138 * @req_bd_dma: login request BD table dma address 139 * @resp_bd_tbl: iscsi login response payload BD table 140 * @resp_bd_dma: login request BD table dma address 141 * 142 * following structure defines buffer info for generic pdus such as iSCSI Login, 143 * Logout and NOP 144 */ 145 struct generic_pdu_resc { 146 char *req_buf; 147 dma_addr_t req_dma_addr; 148 u32 req_buf_size; 149 char *req_wr_ptr; 150 struct iscsi_hdr resp_hdr; 151 char *resp_buf; 152 dma_addr_t resp_dma_addr; 153 u32 resp_buf_size; 154 char *resp_wr_ptr; 155 char *req_bd_tbl; 156 dma_addr_t req_bd_dma; 157 char *resp_bd_tbl; 158 dma_addr_t resp_bd_dma; 159 }; 160 161 162 /** 163 * struct bd_resc_page - tracks DMA'able memory allocated for BD tables 164 * 165 * @link: list head to link elements 166 * @max_ptrs: maximun pointers that can be stored in this page 167 * @num_valid: number of pointer valid in this page 168 * @page: base addess for page pointer array 169 * 170 * structure to track DMA'able memory allocated for command BD tables 171 */ 172 struct bd_resc_page { 173 struct list_head link; 174 u32 max_ptrs; 175 u32 num_valid; 176 void *page[1]; 177 }; 178 179 180 /** 181 * struct io_bdt - I/O buffer destricptor table 182 * 183 * @bd_tbl: BD table's virtual address 184 * @bd_tbl_dma: BD table's dma address 185 * @bd_valid: num valid BD entries 186 * 187 * IO BD table 188 */ 189 struct io_bdt { 190 struct iscsi_bd *bd_tbl; 191 dma_addr_t bd_tbl_dma; 192 u16 bd_valid; 193 }; 194 195 196 /** 197 * bnx2i_cmd - iscsi command structure 198 * 199 * @scsi_cmd: SCSI-ML task pointer corresponding to this iscsi cmd 200 * @sg: SG list 201 * @io_tbl: buffer descriptor (BD) table 202 * @bd_tbl_dma: buffer descriptor (BD) table's dma address 203 */ 204 struct bnx2i_cmd { 205 struct iscsi_hdr hdr; 206 struct bnx2i_conn *conn; 207 struct scsi_cmnd *scsi_cmd; 208 struct scatterlist *sg; 209 struct io_bdt io_tbl; 210 dma_addr_t bd_tbl_dma; 211 struct bnx2i_cmd_request req; 212 }; 213 214 215 /** 216 * struct bnx2i_conn - iscsi connection structure 217 * 218 * @cls_conn: pointer to iscsi cls conn 219 * @hba: adapter structure pointer 220 * @iscsi_conn_cid: iscsi conn id 221 * @fw_cid: firmware iscsi context id 222 * @ep: endpoint structure pointer 223 * @gen_pdu: login/nopout/logout pdu resources 224 * @violation_notified: bit mask used to track iscsi error/warning messages 225 * already printed out 226 * 227 * iSCSI connection structure 228 */ 229 struct bnx2i_conn { 230 struct iscsi_cls_conn *cls_conn; 231 struct bnx2i_hba *hba; 232 struct completion cmd_cleanup_cmpl; 233 int is_bound; 234 235 u32 iscsi_conn_cid; 236 #define BNX2I_CID_RESERVED 0x5AFF 237 u32 fw_cid; 238 239 struct timer_list poll_timer; 240 /* 241 * Queue Pair (QP) related structure elements. 242 */ 243 struct bnx2i_endpoint *ep; 244 245 /* 246 * Buffer for login negotiation process 247 */ 248 struct generic_pdu_resc gen_pdu; 249 u64 violation_notified; 250 }; 251 252 253 254 /** 255 * struct iscsi_cid_queue - Per adapter iscsi cid queue 256 * 257 * @cid_que_base: queue base memory 258 * @cid_que: queue memory pointer 259 * @cid_q_prod_idx: produce index 260 * @cid_q_cons_idx: consumer index 261 * @cid_q_max_idx: max index. used to detect wrap around condition 262 * @cid_free_cnt: queue size 263 * @conn_cid_tbl: iscsi cid to conn structure mapping table 264 * 265 * Per adapter iSCSI CID Queue 266 */ 267 struct iscsi_cid_queue { 268 void *cid_que_base; 269 u32 *cid_que; 270 u32 cid_q_prod_idx; 271 u32 cid_q_cons_idx; 272 u32 cid_q_max_idx; 273 u32 cid_free_cnt; 274 struct bnx2i_conn **conn_cid_tbl; 275 }; 276 277 /** 278 * struct bnx2i_hba - bnx2i adapter structure 279 * 280 * @link: list head to link elements 281 * @cnic: pointer to cnic device 282 * @pcidev: pointer to pci dev 283 * @netdev: pointer to netdev structure 284 * @regview: mapped PCI register space 285 * @age: age, incremented by every recovery 286 * @cnic_dev_type: cnic device type, 5706/5708/5709/57710 287 * @mail_queue_access: mailbox queue access mode, applicable to 5709 only 288 * @reg_with_cnic: indicates whether the device is register with CNIC 289 * @adapter_state: adapter state, UP, GOING_DOWN, LINK_DOWN 290 * @mtu_supported: Ethernet MTU supported 291 * @shost: scsi host pointer 292 * @max_sqes: SQ size 293 * @max_rqes: RQ size 294 * @max_cqes: CQ size 295 * @num_ccell: number of command cells per connection 296 * @ofld_conns_active: active connection list 297 * @max_active_conns: max offload connections supported by this device 298 * @cid_que: iscsi cid queue 299 * @ep_rdwr_lock: read / write lock to synchronize various ep lists 300 * @ep_ofld_list: connection list for pending offload completion 301 * @ep_destroy_list: connection list for pending offload completion 302 * @mp_bd_tbl: BD table to be used with middle path requests 303 * @mp_bd_dma: DMA address of 'mp_bd_tbl' memory buffer 304 * @dummy_buffer: Dummy buffer to be used with zero length scsicmd reqs 305 * @dummy_buf_dma: DMA address of 'dummy_buffer' memory buffer 306 * @lock: lock to synchonize access to hba structure 307 * @pci_did: PCI device ID 308 * @pci_vid: PCI vendor ID 309 * @pci_sdid: PCI subsystem device ID 310 * @pci_svid: PCI subsystem vendor ID 311 * @pci_func: PCI function number in system pci tree 312 * @pci_devno: PCI device number in system pci tree 313 * @num_wqe_sent: statistic counter, total wqe's sent 314 * @num_cqe_rcvd: statistic counter, total cqe's received 315 * @num_intr_claimed: statistic counter, total interrupts claimed 316 * @link_changed_count: statistic counter, num of link change notifications 317 * received 318 * @ipaddr_changed_count: statistic counter, num times IP address changed while 319 * at least one connection is offloaded 320 * @num_sess_opened: statistic counter, total num sessions opened 321 * @num_conn_opened: statistic counter, total num conns opened on this hba 322 * @ctx_ccell_tasks: captures number of ccells and tasks supported by 323 * currently offloaded connection, used to decode 324 * context memory 325 * 326 * Adapter Data Structure 327 */ 328 struct bnx2i_hba { 329 struct list_head link; 330 struct cnic_dev *cnic; 331 struct pci_dev *pcidev; 332 struct net_device *netdev; 333 void __iomem *regview; 334 335 u32 age; 336 unsigned long cnic_dev_type; 337 #define BNX2I_NX2_DEV_5706 0x0 338 #define BNX2I_NX2_DEV_5708 0x1 339 #define BNX2I_NX2_DEV_5709 0x2 340 #define BNX2I_NX2_DEV_57710 0x3 341 u32 mail_queue_access; 342 #define BNX2I_MQ_KERNEL_MODE 0x0 343 #define BNX2I_MQ_KERNEL_BYPASS_MODE 0x1 344 #define BNX2I_MQ_BIN_MODE 0x2 345 unsigned long reg_with_cnic; 346 #define BNX2I_CNIC_REGISTERED 1 347 348 unsigned long adapter_state; 349 #define ADAPTER_STATE_UP 0 350 #define ADAPTER_STATE_GOING_DOWN 1 351 #define ADAPTER_STATE_LINK_DOWN 2 352 #define ADAPTER_STATE_INIT_FAILED 31 353 unsigned int mtu_supported; 354 #define BNX2I_MAX_MTU_SUPPORTED 1500 355 356 struct Scsi_Host *shost; 357 358 u32 max_sqes; 359 u32 max_rqes; 360 u32 max_cqes; 361 u32 num_ccell; 362 363 int ofld_conns_active; 364 365 int max_active_conns; 366 struct iscsi_cid_queue cid_que; 367 368 rwlock_t ep_rdwr_lock; 369 struct list_head ep_ofld_list; 370 struct list_head ep_destroy_list; 371 372 /* 373 * BD table to be used with MP (Middle Path requests. 374 */ 375 char *mp_bd_tbl; 376 dma_addr_t mp_bd_dma; 377 char *dummy_buffer; 378 dma_addr_t dummy_buf_dma; 379 380 spinlock_t lock; /* protects hba structure access */ 381 struct mutex net_dev_lock;/* sync net device access */ 382 383 /* 384 * PCI related info. 385 */ 386 u16 pci_did; 387 u16 pci_vid; 388 u16 pci_sdid; 389 u16 pci_svid; 390 u16 pci_func; 391 u16 pci_devno; 392 393 /* 394 * Following are a bunch of statistics useful during development 395 * and later stage for score boarding. 396 */ 397 u32 num_wqe_sent; 398 u32 num_cqe_rcvd; 399 u32 num_intr_claimed; 400 u32 link_changed_count; 401 u32 ipaddr_changed_count; 402 u32 num_sess_opened; 403 u32 num_conn_opened; 404 unsigned int ctx_ccell_tasks; 405 }; 406 407 408 /******************************************************************************* 409 * QP [ SQ / RQ / CQ ] info. 410 ******************************************************************************/ 411 412 /* 413 * SQ/RQ/CQ generic structure definition 414 */ 415 struct sqe { 416 u8 sqe_byte[BNX2I_SQ_WQE_SIZE]; 417 }; 418 419 struct rqe { 420 u8 rqe_byte[BNX2I_RQ_WQE_SIZE]; 421 }; 422 423 struct cqe { 424 u8 cqe_byte[BNX2I_CQE_SIZE]; 425 }; 426 427 428 enum { 429 #if defined(__LITTLE_ENDIAN) 430 CNIC_EVENT_COAL_INDEX = 0x0, 431 CNIC_SEND_DOORBELL = 0x4, 432 CNIC_EVENT_CQ_ARM = 0x7, 433 CNIC_RECV_DOORBELL = 0x8 434 #elif defined(__BIG_ENDIAN) 435 CNIC_EVENT_COAL_INDEX = 0x2, 436 CNIC_SEND_DOORBELL = 0x6, 437 CNIC_EVENT_CQ_ARM = 0x4, 438 CNIC_RECV_DOORBELL = 0xa 439 #endif 440 }; 441 442 443 /* 444 * CQ DB 445 */ 446 struct bnx2x_iscsi_cq_pend_cmpl { 447 /* CQ producer, updated by Ustorm */ 448 u16 ustrom_prod; 449 /* CQ pending completion counter */ 450 u16 pend_cntr; 451 }; 452 453 454 struct bnx2i_5771x_cq_db { 455 struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS]; 456 /* CQ pending completion ITT array */ 457 u16 itt[BNX2X_MAX_CQS]; 458 /* Cstorm CQ sequence to notify array, updated by driver */; 459 u16 sqn[BNX2X_MAX_CQS]; 460 u32 reserved[4] /* 16 byte allignment */; 461 }; 462 463 464 struct bnx2i_5771x_sq_rq_db { 465 u16 prod_idx; 466 u8 reserved0[14]; /* Pad structure size to 16 bytes */ 467 }; 468 469 470 struct bnx2i_5771x_dbell_hdr { 471 u8 header; 472 /* 1 for rx doorbell, 0 for tx doorbell */ 473 #define B577XX_DOORBELL_HDR_RX (0x1<<0) 474 #define B577XX_DOORBELL_HDR_RX_SHIFT 0 475 /* 0 for normal doorbell, 1 for advertise wnd doorbell */ 476 #define B577XX_DOORBELL_HDR_DB_TYPE (0x1<<1) 477 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT 1 478 /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */ 479 #define B577XX_DOORBELL_HDR_DPM_SIZE (0x3<<2) 480 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT 2 481 /* connection type */ 482 #define B577XX_DOORBELL_HDR_CONN_TYPE (0xF<<4) 483 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT 4 484 }; 485 486 struct bnx2i_5771x_dbell { 487 struct bnx2i_5771x_dbell_hdr dbell; 488 u8 pad[3]; 489 490 }; 491 492 /** 493 * struct qp_info - QP (share queue region) atrributes structure 494 * 495 * @ctx_base: ioremapped pci register base to access doorbell register 496 * pertaining to this offloaded connection 497 * @sq_virt: virtual address of send queue (SQ) region 498 * @sq_phys: DMA address of SQ memory region 499 * @sq_mem_size: SQ size 500 * @sq_prod_qe: SQ producer entry pointer 501 * @sq_cons_qe: SQ consumer entry pointer 502 * @sq_first_qe: virtaul address of first entry in SQ 503 * @sq_last_qe: virtaul address of last entry in SQ 504 * @sq_prod_idx: SQ producer index 505 * @sq_cons_idx: SQ consumer index 506 * @sqe_left: number sq entry left 507 * @sq_pgtbl_virt: page table describing buffer consituting SQ region 508 * @sq_pgtbl_phys: dma address of 'sq_pgtbl_virt' 509 * @sq_pgtbl_size: SQ page table size 510 * @cq_virt: virtual address of completion queue (CQ) region 511 * @cq_phys: DMA address of RQ memory region 512 * @cq_mem_size: CQ size 513 * @cq_prod_qe: CQ producer entry pointer 514 * @cq_cons_qe: CQ consumer entry pointer 515 * @cq_first_qe: virtaul address of first entry in CQ 516 * @cq_last_qe: virtaul address of last entry in CQ 517 * @cq_prod_idx: CQ producer index 518 * @cq_cons_idx: CQ consumer index 519 * @cqe_left: number cq entry left 520 * @cqe_size: size of each CQ entry 521 * @cqe_exp_seq_sn: next expected CQE sequence number 522 * @cq_pgtbl_virt: page table describing buffer consituting CQ region 523 * @cq_pgtbl_phys: dma address of 'cq_pgtbl_virt' 524 * @cq_pgtbl_size: CQ page table size 525 * @rq_virt: virtual address of receive queue (RQ) region 526 * @rq_phys: DMA address of RQ memory region 527 * @rq_mem_size: RQ size 528 * @rq_prod_qe: RQ producer entry pointer 529 * @rq_cons_qe: RQ consumer entry pointer 530 * @rq_first_qe: virtaul address of first entry in RQ 531 * @rq_last_qe: virtaul address of last entry in RQ 532 * @rq_prod_idx: RQ producer index 533 * @rq_cons_idx: RQ consumer index 534 * @rqe_left: number rq entry left 535 * @rq_pgtbl_virt: page table describing buffer consituting RQ region 536 * @rq_pgtbl_phys: dma address of 'rq_pgtbl_virt' 537 * @rq_pgtbl_size: RQ page table size 538 * 539 * queue pair (QP) is a per connection shared data structure which is used 540 * to send work requests (SQ), receive completion notifications (CQ) 541 * and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure 542 * below holds queue memory, consumer/producer indexes and page table 543 * information 544 */ 545 struct qp_info { 546 void __iomem *ctx_base; 547 #define DPM_TRIGER_TYPE 0x40 548 549 #define BNX2I_570x_QUE_DB_SIZE 0 550 #define BNX2I_5771x_QUE_DB_SIZE 16 551 struct sqe *sq_virt; 552 dma_addr_t sq_phys; 553 u32 sq_mem_size; 554 555 struct sqe *sq_prod_qe; 556 struct sqe *sq_cons_qe; 557 struct sqe *sq_first_qe; 558 struct sqe *sq_last_qe; 559 u16 sq_prod_idx; 560 u16 sq_cons_idx; 561 u32 sqe_left; 562 563 void *sq_pgtbl_virt; 564 dma_addr_t sq_pgtbl_phys; 565 u32 sq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 566 567 struct cqe *cq_virt; 568 dma_addr_t cq_phys; 569 u32 cq_mem_size; 570 571 struct cqe *cq_prod_qe; 572 struct cqe *cq_cons_qe; 573 struct cqe *cq_first_qe; 574 struct cqe *cq_last_qe; 575 u16 cq_prod_idx; 576 u16 cq_cons_idx; 577 u32 cqe_left; 578 u32 cqe_size; 579 u32 cqe_exp_seq_sn; 580 581 void *cq_pgtbl_virt; 582 dma_addr_t cq_pgtbl_phys; 583 u32 cq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 584 585 struct rqe *rq_virt; 586 dma_addr_t rq_phys; 587 u32 rq_mem_size; 588 589 struct rqe *rq_prod_qe; 590 struct rqe *rq_cons_qe; 591 struct rqe *rq_first_qe; 592 struct rqe *rq_last_qe; 593 u16 rq_prod_idx; 594 u16 rq_cons_idx; 595 u32 rqe_left; 596 597 void *rq_pgtbl_virt; 598 dma_addr_t rq_pgtbl_phys; 599 u32 rq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 600 }; 601 602 603 604 /* 605 * CID handles 606 */ 607 struct ep_handles { 608 u32 fw_cid; 609 u32 drv_iscsi_cid; 610 u16 pg_cid; 611 u16 rsvd; 612 }; 613 614 615 enum { 616 EP_STATE_IDLE = 0x0, 617 EP_STATE_PG_OFLD_START = 0x1, 618 EP_STATE_PG_OFLD_COMPL = 0x2, 619 EP_STATE_OFLD_START = 0x4, 620 EP_STATE_OFLD_COMPL = 0x8, 621 EP_STATE_CONNECT_START = 0x10, 622 EP_STATE_CONNECT_COMPL = 0x20, 623 EP_STATE_ULP_UPDATE_START = 0x40, 624 EP_STATE_ULP_UPDATE_COMPL = 0x80, 625 EP_STATE_DISCONN_START = 0x100, 626 EP_STATE_DISCONN_COMPL = 0x200, 627 EP_STATE_CLEANUP_START = 0x400, 628 EP_STATE_CLEANUP_CMPL = 0x800, 629 EP_STATE_TCP_FIN_RCVD = 0x1000, 630 EP_STATE_TCP_RST_RCVD = 0x2000, 631 EP_STATE_PG_OFLD_FAILED = 0x1000000, 632 EP_STATE_ULP_UPDATE_FAILED = 0x2000000, 633 EP_STATE_CLEANUP_FAILED = 0x4000000, 634 EP_STATE_OFLD_FAILED = 0x8000000, 635 EP_STATE_CONNECT_FAILED = 0x10000000, 636 EP_STATE_DISCONN_TIMEDOUT = 0x20000000, 637 }; 638 639 /** 640 * struct bnx2i_endpoint - representation of tcp connection in NX2 world 641 * 642 * @link: list head to link elements 643 * @hba: adapter to which this connection belongs 644 * @conn: iscsi connection this EP is linked to 645 * @sess: iscsi session this EP is linked to 646 * @cm_sk: cnic sock struct 647 * @hba_age: age to detect if 'iscsid' issues ep_disconnect() 648 * after HBA reset is completed by bnx2i/cnic/bnx2 649 * modules 650 * @state: tracks offload connection state machine 651 * @teardown_mode: indicates if conn teardown is abortive or orderly 652 * @qp: QP information 653 * @ids: contains chip allocated *context id* & driver assigned 654 * *iscsi cid* 655 * @ofld_timer: offload timer to detect timeout 656 * @ofld_wait: wait queue 657 * 658 * Endpoint Structure - equivalent of tcp socket structure 659 */ 660 struct bnx2i_endpoint { 661 struct list_head link; 662 struct bnx2i_hba *hba; 663 struct bnx2i_conn *conn; 664 struct cnic_sock *cm_sk; 665 u32 hba_age; 666 u32 state; 667 unsigned long timestamp; 668 int num_active_cmds; 669 670 struct qp_info qp; 671 struct ep_handles ids; 672 #define ep_iscsi_cid ids.drv_iscsi_cid 673 #define ep_cid ids.fw_cid 674 #define ep_pg_cid ids.pg_cid 675 struct timer_list ofld_timer; 676 wait_queue_head_t ofld_wait; 677 }; 678 679 680 681 /* Global variables */ 682 extern unsigned int error_mask1, error_mask2; 683 extern u64 iscsi_error_mask; 684 extern unsigned int en_tcp_dack; 685 extern unsigned int event_coal_div; 686 687 extern struct scsi_transport_template *bnx2i_scsi_xport_template; 688 extern struct iscsi_transport bnx2i_iscsi_transport; 689 extern struct cnic_ulp_ops bnx2i_cnic_cb; 690 691 extern unsigned int sq_size; 692 extern unsigned int rq_size; 693 694 extern struct device_attribute *bnx2i_dev_attributes[]; 695 696 697 698 /* 699 * Function Prototypes 700 */ 701 extern void bnx2i_identify_device(struct bnx2i_hba *hba); 702 extern void bnx2i_register_device(struct bnx2i_hba *hba); 703 704 extern void bnx2i_ulp_init(struct cnic_dev *dev); 705 extern void bnx2i_ulp_exit(struct cnic_dev *dev); 706 extern void bnx2i_start(void *handle); 707 extern void bnx2i_stop(void *handle); 708 extern void bnx2i_reg_dev_all(void); 709 extern void bnx2i_unreg_dev_all(void); 710 extern struct bnx2i_hba *get_adapter_list_head(void); 711 712 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, 713 u16 iscsi_cid); 714 715 int bnx2i_alloc_ep_pool(void); 716 void bnx2i_release_ep_pool(void); 717 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba); 718 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba); 719 720 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic); 721 722 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic); 723 void bnx2i_free_hba(struct bnx2i_hba *hba); 724 725 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len); 726 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count); 727 728 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd); 729 730 void bnx2i_drop_session(struct iscsi_cls_session *session); 731 732 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba); 733 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn, 734 struct iscsi_task *mtask); 735 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn, 736 struct iscsi_task *mtask); 737 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn, 738 struct bnx2i_cmd *cmnd); 739 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn, 740 struct iscsi_task *mtask, u32 ttt, 741 char *datap, int data_len, int unsol); 742 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn, 743 struct iscsi_task *mtask); 744 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, 745 struct bnx2i_cmd *cmd); 746 extern void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, 747 struct bnx2i_endpoint *ep); 748 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn); 749 extern void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, 750 struct bnx2i_endpoint *ep); 751 752 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, 753 struct bnx2i_endpoint *ep); 754 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba, 755 struct bnx2i_endpoint *ep); 756 extern void bnx2i_ep_ofld_timer(unsigned long data); 757 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list( 758 struct bnx2i_hba *hba, u32 iscsi_cid); 759 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list( 760 struct bnx2i_hba *hba, u32 iscsi_cid); 761 762 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep); 763 extern void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action); 764 765 /* Debug related function prototypes */ 766 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn); 767 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn); 768 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn); 769 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn); 770 771 #endif 772