1 /* bnx2i.h: Broadcom NetXtreme II iSCSI driver. 2 * 3 * Copyright (c) 2006 - 2010 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 * Maintained by: Eddie Wai (eddie.wai@broadcom.com) 13 */ 14 15 #ifndef _BNX2I_H_ 16 #define _BNX2I_H_ 17 18 #include <linux/module.h> 19 #include <linux/moduleparam.h> 20 21 #include <linux/errno.h> 22 #include <linux/pci.h> 23 #include <linux/spinlock.h> 24 #include <linux/interrupt.h> 25 #include <linux/sched.h> 26 #include <linux/in.h> 27 #include <linux/kfifo.h> 28 #include <linux/netdevice.h> 29 #include <linux/completion.h> 30 31 #include <scsi/scsi_cmnd.h> 32 #include <scsi/scsi_device.h> 33 #include <scsi/scsi_eh.h> 34 #include <scsi/scsi_host.h> 35 #include <scsi/scsi.h> 36 #include <scsi/iscsi_proto.h> 37 #include <scsi/libiscsi.h> 38 #include <scsi/scsi_transport_iscsi.h> 39 40 #include "../../net/cnic_if.h" 41 #include "57xx_iscsi_hsi.h" 42 #include "57xx_iscsi_constants.h" 43 44 #define BNX2_ISCSI_DRIVER_NAME "bnx2i" 45 46 #define BNX2I_MAX_ADAPTERS 8 47 48 #define ISCSI_MAX_CONNS_PER_HBA 128 49 #define ISCSI_MAX_SESS_PER_HBA ISCSI_MAX_CONNS_PER_HBA 50 #define ISCSI_MAX_CMDS_PER_SESS 128 51 52 /* Total active commands across all connections supported by devices */ 53 #define ISCSI_MAX_CMDS_PER_HBA_5708 (28 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 54 #define ISCSI_MAX_CMDS_PER_HBA_5709 (128 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 55 #define ISCSI_MAX_CMDS_PER_HBA_57710 (256 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 56 57 #define ISCSI_MAX_BDS_PER_CMD 32 58 59 #define MAX_PAGES_PER_CTRL_STRUCT_POOL 8 60 #define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS 4 61 62 #define BNX2I_5771X_DBELL_PAGE_SIZE 128 63 64 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */ 65 #define MAX_BD_LENGTH 65535 66 #define BD_SPLIT_SIZE 32768 67 68 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */ 69 #define BNX2I_SQ_WQES_MIN 16 70 #define BNX2I_570X_SQ_WQES_MAX 128 71 #define BNX2I_5770X_SQ_WQES_MAX 512 72 #define BNX2I_570X_SQ_WQES_DEFAULT 128 73 #define BNX2I_5770X_SQ_WQES_DEFAULT 256 74 75 #define BNX2I_570X_CQ_WQES_MAX 128 76 #define BNX2I_5770X_CQ_WQES_MAX 512 77 78 #define BNX2I_RQ_WQES_MIN 16 79 #define BNX2I_RQ_WQES_MAX 32 80 #define BNX2I_RQ_WQES_DEFAULT 16 81 82 /* CCELLs per conn */ 83 #define BNX2I_CCELLS_MIN 16 84 #define BNX2I_CCELLS_MAX 96 85 #define BNX2I_CCELLS_DEFAULT 64 86 87 #define ITT_INVALID_SIGNATURE 0xFFFF 88 89 #define ISCSI_CMD_CLEANUP_TIMEOUT 100 90 91 #define BNX2I_CONN_CTX_BUF_SIZE 16384 92 93 #define BNX2I_SQ_WQE_SIZE 64 94 #define BNX2I_RQ_WQE_SIZE 256 95 #define BNX2I_CQE_SIZE 64 96 97 #define MB_KERNEL_CTX_SHIFT 8 98 #define MB_KERNEL_CTX_SIZE (1 << MB_KERNEL_CTX_SHIFT) 99 100 #define CTX_SHIFT 7 101 #define GET_CID_NUM(cid_addr) ((cid_addr) >> CTX_SHIFT) 102 103 #define CTX_OFFSET 0x10000 104 #define MAX_CID_CNT 0x4000 105 106 #define BNX2I_570X_PAGE_SIZE_DEFAULT 4096 107 108 /* 5709 context registers */ 109 #define BNX2_MQ_CONFIG2 0x00003d00 110 #define BNX2_MQ_CONFIG2_CONT_SZ (0x7L<<4) 111 #define BNX2_MQ_CONFIG2_FIRST_L4L5 (0x1fL<<8) 112 113 /* 57710's BAR2 is mapped to doorbell registers */ 114 #define BNX2X_DOORBELL_PCI_BAR 2 115 #define BNX2X_MAX_CQS 8 116 117 #define CNIC_ARM_CQE 1 118 #define CNIC_DISARM_CQE 0 119 120 #define REG_RD(__hba, offset) \ 121 readl(__hba->regview + offset) 122 #define REG_WR(__hba, offset, val) \ 123 writel(val, __hba->regview + offset) 124 125 126 /** 127 * struct generic_pdu_resc - login pdu resource structure 128 * 129 * @req_buf: driver buffer used to stage payload associated with 130 * the login request 131 * @req_dma_addr: dma address for iscsi login request payload buffer 132 * @req_buf_size: actual login request payload length 133 * @req_wr_ptr: pointer into login request buffer when next data is 134 * to be written 135 * @resp_hdr: iscsi header where iscsi login response header is to 136 * be recreated 137 * @resp_buf: buffer to stage login response payload 138 * @resp_dma_addr: login response payload buffer dma address 139 * @resp_buf_size: login response paylod length 140 * @resp_wr_ptr: pointer into login response buffer when next data is 141 * to be written 142 * @req_bd_tbl: iscsi login request payload BD table 143 * @req_bd_dma: login request BD table dma address 144 * @resp_bd_tbl: iscsi login response payload BD table 145 * @resp_bd_dma: login request BD table dma address 146 * 147 * following structure defines buffer info for generic pdus such as iSCSI Login, 148 * Logout and NOP 149 */ 150 struct generic_pdu_resc { 151 char *req_buf; 152 dma_addr_t req_dma_addr; 153 u32 req_buf_size; 154 char *req_wr_ptr; 155 struct iscsi_hdr resp_hdr; 156 char *resp_buf; 157 dma_addr_t resp_dma_addr; 158 u32 resp_buf_size; 159 char *resp_wr_ptr; 160 char *req_bd_tbl; 161 dma_addr_t req_bd_dma; 162 char *resp_bd_tbl; 163 dma_addr_t resp_bd_dma; 164 }; 165 166 167 /** 168 * struct bd_resc_page - tracks DMA'able memory allocated for BD tables 169 * 170 * @link: list head to link elements 171 * @max_ptrs: maximun pointers that can be stored in this page 172 * @num_valid: number of pointer valid in this page 173 * @page: base addess for page pointer array 174 * 175 * structure to track DMA'able memory allocated for command BD tables 176 */ 177 struct bd_resc_page { 178 struct list_head link; 179 u32 max_ptrs; 180 u32 num_valid; 181 void *page[1]; 182 }; 183 184 185 /** 186 * struct io_bdt - I/O buffer destricptor table 187 * 188 * @bd_tbl: BD table's virtual address 189 * @bd_tbl_dma: BD table's dma address 190 * @bd_valid: num valid BD entries 191 * 192 * IO BD table 193 */ 194 struct io_bdt { 195 struct iscsi_bd *bd_tbl; 196 dma_addr_t bd_tbl_dma; 197 u16 bd_valid; 198 }; 199 200 201 /** 202 * bnx2i_cmd - iscsi command structure 203 * 204 * @scsi_cmd: SCSI-ML task pointer corresponding to this iscsi cmd 205 * @sg: SG list 206 * @io_tbl: buffer descriptor (BD) table 207 * @bd_tbl_dma: buffer descriptor (BD) table's dma address 208 */ 209 struct bnx2i_cmd { 210 struct iscsi_hdr hdr; 211 struct bnx2i_conn *conn; 212 struct scsi_cmnd *scsi_cmd; 213 struct scatterlist *sg; 214 struct io_bdt io_tbl; 215 dma_addr_t bd_tbl_dma; 216 struct bnx2i_cmd_request req; 217 }; 218 219 220 /** 221 * struct bnx2i_conn - iscsi connection structure 222 * 223 * @cls_conn: pointer to iscsi cls conn 224 * @hba: adapter structure pointer 225 * @iscsi_conn_cid: iscsi conn id 226 * @fw_cid: firmware iscsi context id 227 * @ep: endpoint structure pointer 228 * @gen_pdu: login/nopout/logout pdu resources 229 * @violation_notified: bit mask used to track iscsi error/warning messages 230 * already printed out 231 * 232 * iSCSI connection structure 233 */ 234 struct bnx2i_conn { 235 struct iscsi_cls_conn *cls_conn; 236 struct bnx2i_hba *hba; 237 struct completion cmd_cleanup_cmpl; 238 239 u32 iscsi_conn_cid; 240 #define BNX2I_CID_RESERVED 0x5AFF 241 u32 fw_cid; 242 243 struct timer_list poll_timer; 244 /* 245 * Queue Pair (QP) related structure elements. 246 */ 247 struct bnx2i_endpoint *ep; 248 249 /* 250 * Buffer for login negotiation process 251 */ 252 struct generic_pdu_resc gen_pdu; 253 u64 violation_notified; 254 }; 255 256 257 258 /** 259 * struct iscsi_cid_queue - Per adapter iscsi cid queue 260 * 261 * @cid_que_base: queue base memory 262 * @cid_que: queue memory pointer 263 * @cid_q_prod_idx: produce index 264 * @cid_q_cons_idx: consumer index 265 * @cid_q_max_idx: max index. used to detect wrap around condition 266 * @cid_free_cnt: queue size 267 * @conn_cid_tbl: iscsi cid to conn structure mapping table 268 * 269 * Per adapter iSCSI CID Queue 270 */ 271 struct iscsi_cid_queue { 272 void *cid_que_base; 273 u32 *cid_que; 274 u32 cid_q_prod_idx; 275 u32 cid_q_cons_idx; 276 u32 cid_q_max_idx; 277 u32 cid_free_cnt; 278 struct bnx2i_conn **conn_cid_tbl; 279 }; 280 281 /** 282 * struct bnx2i_hba - bnx2i adapter structure 283 * 284 * @link: list head to link elements 285 * @cnic: pointer to cnic device 286 * @pcidev: pointer to pci dev 287 * @netdev: pointer to netdev structure 288 * @regview: mapped PCI register space 289 * @age: age, incremented by every recovery 290 * @cnic_dev_type: cnic device type, 5706/5708/5709/57710 291 * @mail_queue_access: mailbox queue access mode, applicable to 5709 only 292 * @reg_with_cnic: indicates whether the device is register with CNIC 293 * @adapter_state: adapter state, UP, GOING_DOWN, LINK_DOWN 294 * @mtu_supported: Ethernet MTU supported 295 * @shost: scsi host pointer 296 * @max_sqes: SQ size 297 * @max_rqes: RQ size 298 * @max_cqes: CQ size 299 * @num_ccell: number of command cells per connection 300 * @ofld_conns_active: active connection list 301 * @eh_wait: wait queue for the endpoint to shutdown 302 * @max_active_conns: max offload connections supported by this device 303 * @cid_que: iscsi cid queue 304 * @ep_rdwr_lock: read / write lock to synchronize various ep lists 305 * @ep_ofld_list: connection list for pending offload completion 306 * @ep_active_list: connection list for active offload endpoints 307 * @ep_destroy_list: connection list for pending offload completion 308 * @mp_bd_tbl: BD table to be used with middle path requests 309 * @mp_bd_dma: DMA address of 'mp_bd_tbl' memory buffer 310 * @dummy_buffer: Dummy buffer to be used with zero length scsicmd reqs 311 * @dummy_buf_dma: DMA address of 'dummy_buffer' memory buffer 312 * @lock: lock to synchonize access to hba structure 313 * @hba_shutdown_tmo: Timeout value to shutdown each connection 314 * @conn_teardown_tmo: Timeout value to tear down each connection 315 * @conn_ctx_destroy_tmo: Timeout value to destroy context of each connection 316 * @pci_did: PCI device ID 317 * @pci_vid: PCI vendor ID 318 * @pci_sdid: PCI subsystem device ID 319 * @pci_svid: PCI subsystem vendor ID 320 * @pci_func: PCI function number in system pci tree 321 * @pci_devno: PCI device number in system pci tree 322 * @num_wqe_sent: statistic counter, total wqe's sent 323 * @num_cqe_rcvd: statistic counter, total cqe's received 324 * @num_intr_claimed: statistic counter, total interrupts claimed 325 * @link_changed_count: statistic counter, num of link change notifications 326 * received 327 * @ipaddr_changed_count: statistic counter, num times IP address changed while 328 * at least one connection is offloaded 329 * @num_sess_opened: statistic counter, total num sessions opened 330 * @num_conn_opened: statistic counter, total num conns opened on this hba 331 * @ctx_ccell_tasks: captures number of ccells and tasks supported by 332 * currently offloaded connection, used to decode 333 * context memory 334 * 335 * Adapter Data Structure 336 */ 337 struct bnx2i_hba { 338 struct list_head link; 339 struct cnic_dev *cnic; 340 struct pci_dev *pcidev; 341 struct net_device *netdev; 342 void __iomem *regview; 343 344 u32 age; 345 unsigned long cnic_dev_type; 346 #define BNX2I_NX2_DEV_5706 0x0 347 #define BNX2I_NX2_DEV_5708 0x1 348 #define BNX2I_NX2_DEV_5709 0x2 349 #define BNX2I_NX2_DEV_57710 0x3 350 u32 mail_queue_access; 351 #define BNX2I_MQ_KERNEL_MODE 0x0 352 #define BNX2I_MQ_KERNEL_BYPASS_MODE 0x1 353 #define BNX2I_MQ_BIN_MODE 0x2 354 unsigned long reg_with_cnic; 355 #define BNX2I_CNIC_REGISTERED 1 356 357 unsigned long adapter_state; 358 #define ADAPTER_STATE_UP 0 359 #define ADAPTER_STATE_GOING_DOWN 1 360 #define ADAPTER_STATE_LINK_DOWN 2 361 #define ADAPTER_STATE_INIT_FAILED 31 362 unsigned int mtu_supported; 363 #define BNX2I_MAX_MTU_SUPPORTED 9000 364 365 struct Scsi_Host *shost; 366 367 u32 max_sqes; 368 u32 max_rqes; 369 u32 max_cqes; 370 u32 num_ccell; 371 372 int ofld_conns_active; 373 wait_queue_head_t eh_wait; 374 375 int max_active_conns; 376 struct iscsi_cid_queue cid_que; 377 378 rwlock_t ep_rdwr_lock; 379 struct list_head ep_ofld_list; 380 struct list_head ep_active_list; 381 struct list_head ep_destroy_list; 382 383 /* 384 * BD table to be used with MP (Middle Path requests. 385 */ 386 char *mp_bd_tbl; 387 dma_addr_t mp_bd_dma; 388 char *dummy_buffer; 389 dma_addr_t dummy_buf_dma; 390 391 spinlock_t lock; /* protects hba structure access */ 392 struct mutex net_dev_lock;/* sync net device access */ 393 394 int hba_shutdown_tmo; 395 int conn_teardown_tmo; 396 int conn_ctx_destroy_tmo; 397 /* 398 * PCI related info. 399 */ 400 u16 pci_did; 401 u16 pci_vid; 402 u16 pci_sdid; 403 u16 pci_svid; 404 u16 pci_func; 405 u16 pci_devno; 406 407 /* 408 * Following are a bunch of statistics useful during development 409 * and later stage for score boarding. 410 */ 411 u32 num_wqe_sent; 412 u32 num_cqe_rcvd; 413 u32 num_intr_claimed; 414 u32 link_changed_count; 415 u32 ipaddr_changed_count; 416 u32 num_sess_opened; 417 u32 num_conn_opened; 418 unsigned int ctx_ccell_tasks; 419 }; 420 421 422 /******************************************************************************* 423 * QP [ SQ / RQ / CQ ] info. 424 ******************************************************************************/ 425 426 /* 427 * SQ/RQ/CQ generic structure definition 428 */ 429 struct sqe { 430 u8 sqe_byte[BNX2I_SQ_WQE_SIZE]; 431 }; 432 433 struct rqe { 434 u8 rqe_byte[BNX2I_RQ_WQE_SIZE]; 435 }; 436 437 struct cqe { 438 u8 cqe_byte[BNX2I_CQE_SIZE]; 439 }; 440 441 442 enum { 443 #if defined(__LITTLE_ENDIAN) 444 CNIC_EVENT_COAL_INDEX = 0x0, 445 CNIC_SEND_DOORBELL = 0x4, 446 CNIC_EVENT_CQ_ARM = 0x7, 447 CNIC_RECV_DOORBELL = 0x8 448 #elif defined(__BIG_ENDIAN) 449 CNIC_EVENT_COAL_INDEX = 0x2, 450 CNIC_SEND_DOORBELL = 0x6, 451 CNIC_EVENT_CQ_ARM = 0x4, 452 CNIC_RECV_DOORBELL = 0xa 453 #endif 454 }; 455 456 457 /* 458 * CQ DB 459 */ 460 struct bnx2x_iscsi_cq_pend_cmpl { 461 /* CQ producer, updated by Ustorm */ 462 u16 ustrom_prod; 463 /* CQ pending completion counter */ 464 u16 pend_cntr; 465 }; 466 467 468 struct bnx2i_5771x_cq_db { 469 struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS]; 470 /* CQ pending completion ITT array */ 471 u16 itt[BNX2X_MAX_CQS]; 472 /* Cstorm CQ sequence to notify array, updated by driver */; 473 u16 sqn[BNX2X_MAX_CQS]; 474 u32 reserved[4] /* 16 byte allignment */; 475 }; 476 477 478 struct bnx2i_5771x_sq_rq_db { 479 u16 prod_idx; 480 u8 reserved0[14]; /* Pad structure size to 16 bytes */ 481 }; 482 483 484 struct bnx2i_5771x_dbell_hdr { 485 u8 header; 486 /* 1 for rx doorbell, 0 for tx doorbell */ 487 #define B577XX_DOORBELL_HDR_RX (0x1<<0) 488 #define B577XX_DOORBELL_HDR_RX_SHIFT 0 489 /* 0 for normal doorbell, 1 for advertise wnd doorbell */ 490 #define B577XX_DOORBELL_HDR_DB_TYPE (0x1<<1) 491 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT 1 492 /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */ 493 #define B577XX_DOORBELL_HDR_DPM_SIZE (0x3<<2) 494 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT 2 495 /* connection type */ 496 #define B577XX_DOORBELL_HDR_CONN_TYPE (0xF<<4) 497 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT 4 498 }; 499 500 struct bnx2i_5771x_dbell { 501 struct bnx2i_5771x_dbell_hdr dbell; 502 u8 pad[3]; 503 504 }; 505 506 /** 507 * struct qp_info - QP (share queue region) atrributes structure 508 * 509 * @ctx_base: ioremapped pci register base to access doorbell register 510 * pertaining to this offloaded connection 511 * @sq_virt: virtual address of send queue (SQ) region 512 * @sq_phys: DMA address of SQ memory region 513 * @sq_mem_size: SQ size 514 * @sq_prod_qe: SQ producer entry pointer 515 * @sq_cons_qe: SQ consumer entry pointer 516 * @sq_first_qe: virtaul address of first entry in SQ 517 * @sq_last_qe: virtaul address of last entry in SQ 518 * @sq_prod_idx: SQ producer index 519 * @sq_cons_idx: SQ consumer index 520 * @sqe_left: number sq entry left 521 * @sq_pgtbl_virt: page table describing buffer consituting SQ region 522 * @sq_pgtbl_phys: dma address of 'sq_pgtbl_virt' 523 * @sq_pgtbl_size: SQ page table size 524 * @cq_virt: virtual address of completion queue (CQ) region 525 * @cq_phys: DMA address of RQ memory region 526 * @cq_mem_size: CQ size 527 * @cq_prod_qe: CQ producer entry pointer 528 * @cq_cons_qe: CQ consumer entry pointer 529 * @cq_first_qe: virtaul address of first entry in CQ 530 * @cq_last_qe: virtaul address of last entry in CQ 531 * @cq_prod_idx: CQ producer index 532 * @cq_cons_idx: CQ consumer index 533 * @cqe_left: number cq entry left 534 * @cqe_size: size of each CQ entry 535 * @cqe_exp_seq_sn: next expected CQE sequence number 536 * @cq_pgtbl_virt: page table describing buffer consituting CQ region 537 * @cq_pgtbl_phys: dma address of 'cq_pgtbl_virt' 538 * @cq_pgtbl_size: CQ page table size 539 * @rq_virt: virtual address of receive queue (RQ) region 540 * @rq_phys: DMA address of RQ memory region 541 * @rq_mem_size: RQ size 542 * @rq_prod_qe: RQ producer entry pointer 543 * @rq_cons_qe: RQ consumer entry pointer 544 * @rq_first_qe: virtaul address of first entry in RQ 545 * @rq_last_qe: virtaul address of last entry in RQ 546 * @rq_prod_idx: RQ producer index 547 * @rq_cons_idx: RQ consumer index 548 * @rqe_left: number rq entry left 549 * @rq_pgtbl_virt: page table describing buffer consituting RQ region 550 * @rq_pgtbl_phys: dma address of 'rq_pgtbl_virt' 551 * @rq_pgtbl_size: RQ page table size 552 * 553 * queue pair (QP) is a per connection shared data structure which is used 554 * to send work requests (SQ), receive completion notifications (CQ) 555 * and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure 556 * below holds queue memory, consumer/producer indexes and page table 557 * information 558 */ 559 struct qp_info { 560 void __iomem *ctx_base; 561 #define DPM_TRIGER_TYPE 0x40 562 563 #define BNX2I_570x_QUE_DB_SIZE 0 564 #define BNX2I_5771x_QUE_DB_SIZE 16 565 struct sqe *sq_virt; 566 dma_addr_t sq_phys; 567 u32 sq_mem_size; 568 569 struct sqe *sq_prod_qe; 570 struct sqe *sq_cons_qe; 571 struct sqe *sq_first_qe; 572 struct sqe *sq_last_qe; 573 u16 sq_prod_idx; 574 u16 sq_cons_idx; 575 u32 sqe_left; 576 577 void *sq_pgtbl_virt; 578 dma_addr_t sq_pgtbl_phys; 579 u32 sq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 580 581 struct cqe *cq_virt; 582 dma_addr_t cq_phys; 583 u32 cq_mem_size; 584 585 struct cqe *cq_prod_qe; 586 struct cqe *cq_cons_qe; 587 struct cqe *cq_first_qe; 588 struct cqe *cq_last_qe; 589 u16 cq_prod_idx; 590 u16 cq_cons_idx; 591 u32 cqe_left; 592 u32 cqe_size; 593 u32 cqe_exp_seq_sn; 594 595 void *cq_pgtbl_virt; 596 dma_addr_t cq_pgtbl_phys; 597 u32 cq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 598 599 struct rqe *rq_virt; 600 dma_addr_t rq_phys; 601 u32 rq_mem_size; 602 603 struct rqe *rq_prod_qe; 604 struct rqe *rq_cons_qe; 605 struct rqe *rq_first_qe; 606 struct rqe *rq_last_qe; 607 u16 rq_prod_idx; 608 u16 rq_cons_idx; 609 u32 rqe_left; 610 611 void *rq_pgtbl_virt; 612 dma_addr_t rq_pgtbl_phys; 613 u32 rq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 614 }; 615 616 617 618 /* 619 * CID handles 620 */ 621 struct ep_handles { 622 u32 fw_cid; 623 u32 drv_iscsi_cid; 624 u16 pg_cid; 625 u16 rsvd; 626 }; 627 628 629 enum { 630 EP_STATE_IDLE = 0x0, 631 EP_STATE_PG_OFLD_START = 0x1, 632 EP_STATE_PG_OFLD_COMPL = 0x2, 633 EP_STATE_OFLD_START = 0x4, 634 EP_STATE_OFLD_COMPL = 0x8, 635 EP_STATE_CONNECT_START = 0x10, 636 EP_STATE_CONNECT_COMPL = 0x20, 637 EP_STATE_ULP_UPDATE_START = 0x40, 638 EP_STATE_ULP_UPDATE_COMPL = 0x80, 639 EP_STATE_DISCONN_START = 0x100, 640 EP_STATE_DISCONN_COMPL = 0x200, 641 EP_STATE_CLEANUP_START = 0x400, 642 EP_STATE_CLEANUP_CMPL = 0x800, 643 EP_STATE_TCP_FIN_RCVD = 0x1000, 644 EP_STATE_TCP_RST_RCVD = 0x2000, 645 EP_STATE_LOGOUT_SENT = 0x4000, 646 EP_STATE_LOGOUT_RESP_RCVD = 0x8000, 647 EP_STATE_PG_OFLD_FAILED = 0x1000000, 648 EP_STATE_ULP_UPDATE_FAILED = 0x2000000, 649 EP_STATE_CLEANUP_FAILED = 0x4000000, 650 EP_STATE_OFLD_FAILED = 0x8000000, 651 EP_STATE_CONNECT_FAILED = 0x10000000, 652 EP_STATE_DISCONN_TIMEDOUT = 0x20000000, 653 EP_STATE_OFLD_FAILED_CID_BUSY = 0x80000000, 654 }; 655 656 /** 657 * struct bnx2i_endpoint - representation of tcp connection in NX2 world 658 * 659 * @link: list head to link elements 660 * @hba: adapter to which this connection belongs 661 * @conn: iscsi connection this EP is linked to 662 * @cls_ep: associated iSCSI endpoint pointer 663 * @sess: iscsi session this EP is linked to 664 * @cm_sk: cnic sock struct 665 * @hba_age: age to detect if 'iscsid' issues ep_disconnect() 666 * after HBA reset is completed by bnx2i/cnic/bnx2 667 * modules 668 * @state: tracks offload connection state machine 669 * @teardown_mode: indicates if conn teardown is abortive or orderly 670 * @qp: QP information 671 * @ids: contains chip allocated *context id* & driver assigned 672 * *iscsi cid* 673 * @ofld_timer: offload timer to detect timeout 674 * @ofld_wait: wait queue 675 * 676 * Endpoint Structure - equivalent of tcp socket structure 677 */ 678 struct bnx2i_endpoint { 679 struct list_head link; 680 struct bnx2i_hba *hba; 681 struct bnx2i_conn *conn; 682 struct iscsi_endpoint *cls_ep; 683 struct cnic_sock *cm_sk; 684 u32 hba_age; 685 u32 state; 686 unsigned long timestamp; 687 int num_active_cmds; 688 689 struct qp_info qp; 690 struct ep_handles ids; 691 #define ep_iscsi_cid ids.drv_iscsi_cid 692 #define ep_cid ids.fw_cid 693 #define ep_pg_cid ids.pg_cid 694 struct timer_list ofld_timer; 695 wait_queue_head_t ofld_wait; 696 }; 697 698 699 700 /* Global variables */ 701 extern unsigned int error_mask1, error_mask2; 702 extern u64 iscsi_error_mask; 703 extern unsigned int en_tcp_dack; 704 extern unsigned int event_coal_div; 705 extern unsigned int event_coal_min; 706 707 extern struct scsi_transport_template *bnx2i_scsi_xport_template; 708 extern struct iscsi_transport bnx2i_iscsi_transport; 709 extern struct cnic_ulp_ops bnx2i_cnic_cb; 710 711 extern unsigned int sq_size; 712 extern unsigned int rq_size; 713 714 extern struct device_attribute *bnx2i_dev_attributes[]; 715 716 717 718 /* 719 * Function Prototypes 720 */ 721 extern void bnx2i_identify_device(struct bnx2i_hba *hba); 722 723 extern void bnx2i_ulp_init(struct cnic_dev *dev); 724 extern void bnx2i_ulp_exit(struct cnic_dev *dev); 725 extern void bnx2i_start(void *handle); 726 extern void bnx2i_stop(void *handle); 727 extern struct bnx2i_hba *get_adapter_list_head(void); 728 729 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, 730 u16 iscsi_cid); 731 732 int bnx2i_alloc_ep_pool(void); 733 void bnx2i_release_ep_pool(void); 734 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba); 735 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba); 736 737 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic); 738 739 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic); 740 void bnx2i_free_hba(struct bnx2i_hba *hba); 741 742 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len); 743 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count); 744 745 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd); 746 747 void bnx2i_drop_session(struct iscsi_cls_session *session); 748 749 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba); 750 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn, 751 struct iscsi_task *mtask); 752 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn, 753 struct iscsi_task *mtask); 754 extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn, 755 struct iscsi_task *mtask); 756 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn, 757 struct bnx2i_cmd *cmnd); 758 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn, 759 struct iscsi_task *mtask, 760 char *datap, int data_len, int unsol); 761 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn, 762 struct iscsi_task *mtask); 763 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, 764 struct bnx2i_cmd *cmd); 765 extern int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, 766 struct bnx2i_endpoint *ep); 767 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn); 768 extern int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, 769 struct bnx2i_endpoint *ep); 770 771 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, 772 struct bnx2i_endpoint *ep); 773 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba, 774 struct bnx2i_endpoint *ep); 775 extern void bnx2i_ep_ofld_timer(unsigned long data); 776 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list( 777 struct bnx2i_hba *hba, u32 iscsi_cid); 778 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list( 779 struct bnx2i_hba *hba, u32 iscsi_cid); 780 781 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep); 782 extern void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action); 783 784 extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep); 785 786 /* Debug related function prototypes */ 787 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn); 788 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn); 789 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn); 790 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn); 791 792 #endif 793