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 #define BNX2I_570X_PAGE_SIZE_DEFAULT 4096 104 105 /* 5709 context registers */ 106 #define BNX2_MQ_CONFIG2 0x00003d00 107 #define BNX2_MQ_CONFIG2_CONT_SZ (0x7L<<4) 108 #define BNX2_MQ_CONFIG2_FIRST_L4L5 (0x1fL<<8) 109 110 /* 57710's BAR2 is mapped to doorbell registers */ 111 #define BNX2X_DOORBELL_PCI_BAR 2 112 #define BNX2X_MAX_CQS 8 113 114 #define CNIC_ARM_CQE 1 115 #define CNIC_DISARM_CQE 0 116 117 #define REG_RD(__hba, offset) \ 118 readl(__hba->regview + offset) 119 #define REG_WR(__hba, offset, val) \ 120 writel(val, __hba->regview + offset) 121 122 123 /** 124 * struct generic_pdu_resc - login pdu resource structure 125 * 126 * @req_buf: driver buffer used to stage payload associated with 127 * the login request 128 * @req_dma_addr: dma address for iscsi login request payload buffer 129 * @req_buf_size: actual login request payload length 130 * @req_wr_ptr: pointer into login request buffer when next data is 131 * to be written 132 * @resp_hdr: iscsi header where iscsi login response header is to 133 * be recreated 134 * @resp_buf: buffer to stage login response payload 135 * @resp_dma_addr: login response payload buffer dma address 136 * @resp_buf_size: login response paylod length 137 * @resp_wr_ptr: pointer into login response buffer when next data is 138 * to be written 139 * @req_bd_tbl: iscsi login request payload BD table 140 * @req_bd_dma: login request BD table dma address 141 * @resp_bd_tbl: iscsi login response payload BD table 142 * @resp_bd_dma: login request BD table dma address 143 * 144 * following structure defines buffer info for generic pdus such as iSCSI Login, 145 * Logout and NOP 146 */ 147 struct generic_pdu_resc { 148 char *req_buf; 149 dma_addr_t req_dma_addr; 150 u32 req_buf_size; 151 char *req_wr_ptr; 152 struct iscsi_hdr resp_hdr; 153 char *resp_buf; 154 dma_addr_t resp_dma_addr; 155 u32 resp_buf_size; 156 char *resp_wr_ptr; 157 char *req_bd_tbl; 158 dma_addr_t req_bd_dma; 159 char *resp_bd_tbl; 160 dma_addr_t resp_bd_dma; 161 }; 162 163 164 /** 165 * struct bd_resc_page - tracks DMA'able memory allocated for BD tables 166 * 167 * @link: list head to link elements 168 * @max_ptrs: maximun pointers that can be stored in this page 169 * @num_valid: number of pointer valid in this page 170 * @page: base addess for page pointer array 171 * 172 * structure to track DMA'able memory allocated for command BD tables 173 */ 174 struct bd_resc_page { 175 struct list_head link; 176 u32 max_ptrs; 177 u32 num_valid; 178 void *page[1]; 179 }; 180 181 182 /** 183 * struct io_bdt - I/O buffer destricptor table 184 * 185 * @bd_tbl: BD table's virtual address 186 * @bd_tbl_dma: BD table's dma address 187 * @bd_valid: num valid BD entries 188 * 189 * IO BD table 190 */ 191 struct io_bdt { 192 struct iscsi_bd *bd_tbl; 193 dma_addr_t bd_tbl_dma; 194 u16 bd_valid; 195 }; 196 197 198 /** 199 * bnx2i_cmd - iscsi command structure 200 * 201 * @scsi_cmd: SCSI-ML task pointer corresponding to this iscsi cmd 202 * @sg: SG list 203 * @io_tbl: buffer descriptor (BD) table 204 * @bd_tbl_dma: buffer descriptor (BD) table's dma address 205 */ 206 struct bnx2i_cmd { 207 struct iscsi_hdr hdr; 208 struct bnx2i_conn *conn; 209 struct scsi_cmnd *scsi_cmd; 210 struct scatterlist *sg; 211 struct io_bdt io_tbl; 212 dma_addr_t bd_tbl_dma; 213 struct bnx2i_cmd_request req; 214 }; 215 216 217 /** 218 * struct bnx2i_conn - iscsi connection structure 219 * 220 * @cls_conn: pointer to iscsi cls conn 221 * @hba: adapter structure pointer 222 * @iscsi_conn_cid: iscsi conn id 223 * @fw_cid: firmware iscsi context id 224 * @ep: endpoint structure pointer 225 * @gen_pdu: login/nopout/logout pdu resources 226 * @violation_notified: bit mask used to track iscsi error/warning messages 227 * already printed out 228 * 229 * iSCSI connection structure 230 */ 231 struct bnx2i_conn { 232 struct iscsi_cls_conn *cls_conn; 233 struct bnx2i_hba *hba; 234 struct completion cmd_cleanup_cmpl; 235 236 u32 iscsi_conn_cid; 237 #define BNX2I_CID_RESERVED 0x5AFF 238 u32 fw_cid; 239 240 struct timer_list poll_timer; 241 /* 242 * Queue Pair (QP) related structure elements. 243 */ 244 struct bnx2i_endpoint *ep; 245 246 /* 247 * Buffer for login negotiation process 248 */ 249 struct generic_pdu_resc gen_pdu; 250 u64 violation_notified; 251 }; 252 253 254 255 /** 256 * struct iscsi_cid_queue - Per adapter iscsi cid queue 257 * 258 * @cid_que_base: queue base memory 259 * @cid_que: queue memory pointer 260 * @cid_q_prod_idx: produce index 261 * @cid_q_cons_idx: consumer index 262 * @cid_q_max_idx: max index. used to detect wrap around condition 263 * @cid_free_cnt: queue size 264 * @conn_cid_tbl: iscsi cid to conn structure mapping table 265 * 266 * Per adapter iSCSI CID Queue 267 */ 268 struct iscsi_cid_queue { 269 void *cid_que_base; 270 u32 *cid_que; 271 u32 cid_q_prod_idx; 272 u32 cid_q_cons_idx; 273 u32 cid_q_max_idx; 274 u32 cid_free_cnt; 275 struct bnx2i_conn **conn_cid_tbl; 276 }; 277 278 /** 279 * struct bnx2i_hba - bnx2i adapter structure 280 * 281 * @link: list head to link elements 282 * @cnic: pointer to cnic device 283 * @pcidev: pointer to pci dev 284 * @netdev: pointer to netdev structure 285 * @regview: mapped PCI register space 286 * @age: age, incremented by every recovery 287 * @cnic_dev_type: cnic device type, 5706/5708/5709/57710 288 * @mail_queue_access: mailbox queue access mode, applicable to 5709 only 289 * @reg_with_cnic: indicates whether the device is register with CNIC 290 * @adapter_state: adapter state, UP, GOING_DOWN, LINK_DOWN 291 * @mtu_supported: Ethernet MTU supported 292 * @shost: scsi host pointer 293 * @max_sqes: SQ size 294 * @max_rqes: RQ size 295 * @max_cqes: CQ size 296 * @num_ccell: number of command cells per connection 297 * @ofld_conns_active: active connection list 298 * @eh_wait: wait queue for the endpoint to shutdown 299 * @max_active_conns: max offload connections supported by this device 300 * @cid_que: iscsi cid queue 301 * @ep_rdwr_lock: read / write lock to synchronize various ep lists 302 * @ep_ofld_list: connection list for pending offload completion 303 * @ep_active_list: connection list for active offload endpoints 304 * @ep_destroy_list: connection list for pending offload completion 305 * @mp_bd_tbl: BD table to be used with middle path requests 306 * @mp_bd_dma: DMA address of 'mp_bd_tbl' memory buffer 307 * @dummy_buffer: Dummy buffer to be used with zero length scsicmd reqs 308 * @dummy_buf_dma: DMA address of 'dummy_buffer' memory buffer 309 * @lock: lock to synchonize access to hba structure 310 * @hba_shutdown_tmo: Timeout value to shutdown each connection 311 * @conn_teardown_tmo: Timeout value to tear down each connection 312 * @conn_ctx_destroy_tmo: Timeout value to destroy context of each connection 313 * @pci_did: PCI device ID 314 * @pci_vid: PCI vendor ID 315 * @pci_sdid: PCI subsystem device ID 316 * @pci_svid: PCI subsystem vendor ID 317 * @pci_func: PCI function number in system pci tree 318 * @pci_devno: PCI device number in system pci tree 319 * @num_wqe_sent: statistic counter, total wqe's sent 320 * @num_cqe_rcvd: statistic counter, total cqe's received 321 * @num_intr_claimed: statistic counter, total interrupts claimed 322 * @link_changed_count: statistic counter, num of link change notifications 323 * received 324 * @ipaddr_changed_count: statistic counter, num times IP address changed while 325 * at least one connection is offloaded 326 * @num_sess_opened: statistic counter, total num sessions opened 327 * @num_conn_opened: statistic counter, total num conns opened on this hba 328 * @ctx_ccell_tasks: captures number of ccells and tasks supported by 329 * currently offloaded connection, used to decode 330 * context memory 331 * 332 * Adapter Data Structure 333 */ 334 struct bnx2i_hba { 335 struct list_head link; 336 struct cnic_dev *cnic; 337 struct pci_dev *pcidev; 338 struct net_device *netdev; 339 void __iomem *regview; 340 341 u32 age; 342 unsigned long cnic_dev_type; 343 #define BNX2I_NX2_DEV_5706 0x0 344 #define BNX2I_NX2_DEV_5708 0x1 345 #define BNX2I_NX2_DEV_5709 0x2 346 #define BNX2I_NX2_DEV_57710 0x3 347 u32 mail_queue_access; 348 #define BNX2I_MQ_KERNEL_MODE 0x0 349 #define BNX2I_MQ_KERNEL_BYPASS_MODE 0x1 350 #define BNX2I_MQ_BIN_MODE 0x2 351 unsigned long reg_with_cnic; 352 #define BNX2I_CNIC_REGISTERED 1 353 354 unsigned long adapter_state; 355 #define ADAPTER_STATE_UP 0 356 #define ADAPTER_STATE_GOING_DOWN 1 357 #define ADAPTER_STATE_LINK_DOWN 2 358 #define ADAPTER_STATE_INIT_FAILED 31 359 unsigned int mtu_supported; 360 #define BNX2I_MAX_MTU_SUPPORTED 1500 361 362 struct Scsi_Host *shost; 363 364 u32 max_sqes; 365 u32 max_rqes; 366 u32 max_cqes; 367 u32 num_ccell; 368 369 int ofld_conns_active; 370 wait_queue_head_t eh_wait; 371 372 int max_active_conns; 373 struct iscsi_cid_queue cid_que; 374 375 rwlock_t ep_rdwr_lock; 376 struct list_head ep_ofld_list; 377 struct list_head ep_active_list; 378 struct list_head ep_destroy_list; 379 380 /* 381 * BD table to be used with MP (Middle Path requests. 382 */ 383 char *mp_bd_tbl; 384 dma_addr_t mp_bd_dma; 385 char *dummy_buffer; 386 dma_addr_t dummy_buf_dma; 387 388 spinlock_t lock; /* protects hba structure access */ 389 struct mutex net_dev_lock;/* sync net device access */ 390 391 int hba_shutdown_tmo; 392 int conn_teardown_tmo; 393 int conn_ctx_destroy_tmo; 394 /* 395 * PCI related info. 396 */ 397 u16 pci_did; 398 u16 pci_vid; 399 u16 pci_sdid; 400 u16 pci_svid; 401 u16 pci_func; 402 u16 pci_devno; 403 404 /* 405 * Following are a bunch of statistics useful during development 406 * and later stage for score boarding. 407 */ 408 u32 num_wqe_sent; 409 u32 num_cqe_rcvd; 410 u32 num_intr_claimed; 411 u32 link_changed_count; 412 u32 ipaddr_changed_count; 413 u32 num_sess_opened; 414 u32 num_conn_opened; 415 unsigned int ctx_ccell_tasks; 416 }; 417 418 419 /******************************************************************************* 420 * QP [ SQ / RQ / CQ ] info. 421 ******************************************************************************/ 422 423 /* 424 * SQ/RQ/CQ generic structure definition 425 */ 426 struct sqe { 427 u8 sqe_byte[BNX2I_SQ_WQE_SIZE]; 428 }; 429 430 struct rqe { 431 u8 rqe_byte[BNX2I_RQ_WQE_SIZE]; 432 }; 433 434 struct cqe { 435 u8 cqe_byte[BNX2I_CQE_SIZE]; 436 }; 437 438 439 enum { 440 #if defined(__LITTLE_ENDIAN) 441 CNIC_EVENT_COAL_INDEX = 0x0, 442 CNIC_SEND_DOORBELL = 0x4, 443 CNIC_EVENT_CQ_ARM = 0x7, 444 CNIC_RECV_DOORBELL = 0x8 445 #elif defined(__BIG_ENDIAN) 446 CNIC_EVENT_COAL_INDEX = 0x2, 447 CNIC_SEND_DOORBELL = 0x6, 448 CNIC_EVENT_CQ_ARM = 0x4, 449 CNIC_RECV_DOORBELL = 0xa 450 #endif 451 }; 452 453 454 /* 455 * CQ DB 456 */ 457 struct bnx2x_iscsi_cq_pend_cmpl { 458 /* CQ producer, updated by Ustorm */ 459 u16 ustrom_prod; 460 /* CQ pending completion counter */ 461 u16 pend_cntr; 462 }; 463 464 465 struct bnx2i_5771x_cq_db { 466 struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS]; 467 /* CQ pending completion ITT array */ 468 u16 itt[BNX2X_MAX_CQS]; 469 /* Cstorm CQ sequence to notify array, updated by driver */; 470 u16 sqn[BNX2X_MAX_CQS]; 471 u32 reserved[4] /* 16 byte allignment */; 472 }; 473 474 475 struct bnx2i_5771x_sq_rq_db { 476 u16 prod_idx; 477 u8 reserved0[14]; /* Pad structure size to 16 bytes */ 478 }; 479 480 481 struct bnx2i_5771x_dbell_hdr { 482 u8 header; 483 /* 1 for rx doorbell, 0 for tx doorbell */ 484 #define B577XX_DOORBELL_HDR_RX (0x1<<0) 485 #define B577XX_DOORBELL_HDR_RX_SHIFT 0 486 /* 0 for normal doorbell, 1 for advertise wnd doorbell */ 487 #define B577XX_DOORBELL_HDR_DB_TYPE (0x1<<1) 488 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT 1 489 /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */ 490 #define B577XX_DOORBELL_HDR_DPM_SIZE (0x3<<2) 491 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT 2 492 /* connection type */ 493 #define B577XX_DOORBELL_HDR_CONN_TYPE (0xF<<4) 494 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT 4 495 }; 496 497 struct bnx2i_5771x_dbell { 498 struct bnx2i_5771x_dbell_hdr dbell; 499 u8 pad[3]; 500 501 }; 502 503 /** 504 * struct qp_info - QP (share queue region) atrributes structure 505 * 506 * @ctx_base: ioremapped pci register base to access doorbell register 507 * pertaining to this offloaded connection 508 * @sq_virt: virtual address of send queue (SQ) region 509 * @sq_phys: DMA address of SQ memory region 510 * @sq_mem_size: SQ size 511 * @sq_prod_qe: SQ producer entry pointer 512 * @sq_cons_qe: SQ consumer entry pointer 513 * @sq_first_qe: virtaul address of first entry in SQ 514 * @sq_last_qe: virtaul address of last entry in SQ 515 * @sq_prod_idx: SQ producer index 516 * @sq_cons_idx: SQ consumer index 517 * @sqe_left: number sq entry left 518 * @sq_pgtbl_virt: page table describing buffer consituting SQ region 519 * @sq_pgtbl_phys: dma address of 'sq_pgtbl_virt' 520 * @sq_pgtbl_size: SQ page table size 521 * @cq_virt: virtual address of completion queue (CQ) region 522 * @cq_phys: DMA address of RQ memory region 523 * @cq_mem_size: CQ size 524 * @cq_prod_qe: CQ producer entry pointer 525 * @cq_cons_qe: CQ consumer entry pointer 526 * @cq_first_qe: virtaul address of first entry in CQ 527 * @cq_last_qe: virtaul address of last entry in CQ 528 * @cq_prod_idx: CQ producer index 529 * @cq_cons_idx: CQ consumer index 530 * @cqe_left: number cq entry left 531 * @cqe_size: size of each CQ entry 532 * @cqe_exp_seq_sn: next expected CQE sequence number 533 * @cq_pgtbl_virt: page table describing buffer consituting CQ region 534 * @cq_pgtbl_phys: dma address of 'cq_pgtbl_virt' 535 * @cq_pgtbl_size: CQ page table size 536 * @rq_virt: virtual address of receive queue (RQ) region 537 * @rq_phys: DMA address of RQ memory region 538 * @rq_mem_size: RQ size 539 * @rq_prod_qe: RQ producer entry pointer 540 * @rq_cons_qe: RQ consumer entry pointer 541 * @rq_first_qe: virtaul address of first entry in RQ 542 * @rq_last_qe: virtaul address of last entry in RQ 543 * @rq_prod_idx: RQ producer index 544 * @rq_cons_idx: RQ consumer index 545 * @rqe_left: number rq entry left 546 * @rq_pgtbl_virt: page table describing buffer consituting RQ region 547 * @rq_pgtbl_phys: dma address of 'rq_pgtbl_virt' 548 * @rq_pgtbl_size: RQ page table size 549 * 550 * queue pair (QP) is a per connection shared data structure which is used 551 * to send work requests (SQ), receive completion notifications (CQ) 552 * and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure 553 * below holds queue memory, consumer/producer indexes and page table 554 * information 555 */ 556 struct qp_info { 557 void __iomem *ctx_base; 558 #define DPM_TRIGER_TYPE 0x40 559 560 #define BNX2I_570x_QUE_DB_SIZE 0 561 #define BNX2I_5771x_QUE_DB_SIZE 16 562 struct sqe *sq_virt; 563 dma_addr_t sq_phys; 564 u32 sq_mem_size; 565 566 struct sqe *sq_prod_qe; 567 struct sqe *sq_cons_qe; 568 struct sqe *sq_first_qe; 569 struct sqe *sq_last_qe; 570 u16 sq_prod_idx; 571 u16 sq_cons_idx; 572 u32 sqe_left; 573 574 void *sq_pgtbl_virt; 575 dma_addr_t sq_pgtbl_phys; 576 u32 sq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 577 578 struct cqe *cq_virt; 579 dma_addr_t cq_phys; 580 u32 cq_mem_size; 581 582 struct cqe *cq_prod_qe; 583 struct cqe *cq_cons_qe; 584 struct cqe *cq_first_qe; 585 struct cqe *cq_last_qe; 586 u16 cq_prod_idx; 587 u16 cq_cons_idx; 588 u32 cqe_left; 589 u32 cqe_size; 590 u32 cqe_exp_seq_sn; 591 592 void *cq_pgtbl_virt; 593 dma_addr_t cq_pgtbl_phys; 594 u32 cq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 595 596 struct rqe *rq_virt; 597 dma_addr_t rq_phys; 598 u32 rq_mem_size; 599 600 struct rqe *rq_prod_qe; 601 struct rqe *rq_cons_qe; 602 struct rqe *rq_first_qe; 603 struct rqe *rq_last_qe; 604 u16 rq_prod_idx; 605 u16 rq_cons_idx; 606 u32 rqe_left; 607 608 void *rq_pgtbl_virt; 609 dma_addr_t rq_pgtbl_phys; 610 u32 rq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 611 }; 612 613 614 615 /* 616 * CID handles 617 */ 618 struct ep_handles { 619 u32 fw_cid; 620 u32 drv_iscsi_cid; 621 u16 pg_cid; 622 u16 rsvd; 623 }; 624 625 626 enum { 627 EP_STATE_IDLE = 0x0, 628 EP_STATE_PG_OFLD_START = 0x1, 629 EP_STATE_PG_OFLD_COMPL = 0x2, 630 EP_STATE_OFLD_START = 0x4, 631 EP_STATE_OFLD_COMPL = 0x8, 632 EP_STATE_CONNECT_START = 0x10, 633 EP_STATE_CONNECT_COMPL = 0x20, 634 EP_STATE_ULP_UPDATE_START = 0x40, 635 EP_STATE_ULP_UPDATE_COMPL = 0x80, 636 EP_STATE_DISCONN_START = 0x100, 637 EP_STATE_DISCONN_COMPL = 0x200, 638 EP_STATE_CLEANUP_START = 0x400, 639 EP_STATE_CLEANUP_CMPL = 0x800, 640 EP_STATE_TCP_FIN_RCVD = 0x1000, 641 EP_STATE_TCP_RST_RCVD = 0x2000, 642 EP_STATE_LOGOUT_SENT = 0x4000, 643 EP_STATE_LOGOUT_RESP_RCVD = 0x8000, 644 EP_STATE_PG_OFLD_FAILED = 0x1000000, 645 EP_STATE_ULP_UPDATE_FAILED = 0x2000000, 646 EP_STATE_CLEANUP_FAILED = 0x4000000, 647 EP_STATE_OFLD_FAILED = 0x8000000, 648 EP_STATE_CONNECT_FAILED = 0x10000000, 649 EP_STATE_DISCONN_TIMEDOUT = 0x20000000, 650 }; 651 652 /** 653 * struct bnx2i_endpoint - representation of tcp connection in NX2 world 654 * 655 * @link: list head to link elements 656 * @hba: adapter to which this connection belongs 657 * @conn: iscsi connection this EP is linked to 658 * @cls_ep: associated iSCSI endpoint pointer 659 * @sess: iscsi session this EP is linked to 660 * @cm_sk: cnic sock struct 661 * @hba_age: age to detect if 'iscsid' issues ep_disconnect() 662 * after HBA reset is completed by bnx2i/cnic/bnx2 663 * modules 664 * @state: tracks offload connection state machine 665 * @teardown_mode: indicates if conn teardown is abortive or orderly 666 * @qp: QP information 667 * @ids: contains chip allocated *context id* & driver assigned 668 * *iscsi cid* 669 * @ofld_timer: offload timer to detect timeout 670 * @ofld_wait: wait queue 671 * 672 * Endpoint Structure - equivalent of tcp socket structure 673 */ 674 struct bnx2i_endpoint { 675 struct list_head link; 676 struct bnx2i_hba *hba; 677 struct bnx2i_conn *conn; 678 struct iscsi_endpoint *cls_ep; 679 struct cnic_sock *cm_sk; 680 u32 hba_age; 681 u32 state; 682 unsigned long timestamp; 683 int num_active_cmds; 684 685 struct qp_info qp; 686 struct ep_handles ids; 687 #define ep_iscsi_cid ids.drv_iscsi_cid 688 #define ep_cid ids.fw_cid 689 #define ep_pg_cid ids.pg_cid 690 struct timer_list ofld_timer; 691 wait_queue_head_t ofld_wait; 692 }; 693 694 695 696 /* Global variables */ 697 extern unsigned int error_mask1, error_mask2; 698 extern u64 iscsi_error_mask; 699 extern unsigned int en_tcp_dack; 700 extern unsigned int event_coal_div; 701 extern unsigned int event_coal_min; 702 703 extern struct scsi_transport_template *bnx2i_scsi_xport_template; 704 extern struct iscsi_transport bnx2i_iscsi_transport; 705 extern struct cnic_ulp_ops bnx2i_cnic_cb; 706 707 extern unsigned int sq_size; 708 extern unsigned int rq_size; 709 710 extern struct device_attribute *bnx2i_dev_attributes[]; 711 712 713 714 /* 715 * Function Prototypes 716 */ 717 extern void bnx2i_identify_device(struct bnx2i_hba *hba); 718 extern void bnx2i_register_device(struct bnx2i_hba *hba); 719 720 extern void bnx2i_ulp_init(struct cnic_dev *dev); 721 extern void bnx2i_ulp_exit(struct cnic_dev *dev); 722 extern void bnx2i_start(void *handle); 723 extern void bnx2i_stop(void *handle); 724 extern void bnx2i_reg_dev_all(void); 725 extern void bnx2i_unreg_dev_all(void); 726 extern struct bnx2i_hba *get_adapter_list_head(void); 727 728 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, 729 u16 iscsi_cid); 730 731 int bnx2i_alloc_ep_pool(void); 732 void bnx2i_release_ep_pool(void); 733 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba); 734 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba); 735 736 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic); 737 738 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic); 739 void bnx2i_free_hba(struct bnx2i_hba *hba); 740 741 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len); 742 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count); 743 744 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd); 745 746 void bnx2i_drop_session(struct iscsi_cls_session *session); 747 748 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba); 749 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn, 750 struct iscsi_task *mtask); 751 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn, 752 struct iscsi_task *mtask); 753 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn, 754 struct bnx2i_cmd *cmnd); 755 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn, 756 struct iscsi_task *mtask, u32 ttt, 757 char *datap, int data_len, int unsol); 758 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn, 759 struct iscsi_task *mtask); 760 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, 761 struct bnx2i_cmd *cmd); 762 extern void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, 763 struct bnx2i_endpoint *ep); 764 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn); 765 extern void bnx2i_send_conn_destroy(struct bnx2i_hba *hba, 766 struct bnx2i_endpoint *ep); 767 768 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, 769 struct bnx2i_endpoint *ep); 770 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba, 771 struct bnx2i_endpoint *ep); 772 extern void bnx2i_ep_ofld_timer(unsigned long data); 773 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list( 774 struct bnx2i_hba *hba, u32 iscsi_cid); 775 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list( 776 struct bnx2i_hba *hba, u32 iscsi_cid); 777 778 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep); 779 extern void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action); 780 781 extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep); 782 783 /* Debug related function prototypes */ 784 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn); 785 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn); 786 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn); 787 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn); 788 789 #endif 790