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 #define BNX2I_5771X_DBELL_PAGE_SIZE 128 62 63 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */ 64 #define MAX_BD_LENGTH 65535 65 #define BD_SPLIT_SIZE 32768 66 67 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */ 68 #define BNX2I_SQ_WQES_MIN 16 69 #define BNX2I_570X_SQ_WQES_MAX 128 70 #define BNX2I_5770X_SQ_WQES_MAX 512 71 #define BNX2I_570X_SQ_WQES_DEFAULT 128 72 #define BNX2I_5770X_SQ_WQES_DEFAULT 256 73 74 #define BNX2I_570X_CQ_WQES_MAX 128 75 #define BNX2I_5770X_CQ_WQES_MAX 512 76 77 #define BNX2I_RQ_WQES_MIN 16 78 #define BNX2I_RQ_WQES_MAX 32 79 #define BNX2I_RQ_WQES_DEFAULT 16 80 81 /* CCELLs per conn */ 82 #define BNX2I_CCELLS_MIN 16 83 #define BNX2I_CCELLS_MAX 96 84 #define BNX2I_CCELLS_DEFAULT 64 85 86 #define ITT_INVALID_SIGNATURE 0xFFFF 87 88 #define ISCSI_CMD_CLEANUP_TIMEOUT 100 89 90 #define BNX2I_CONN_CTX_BUF_SIZE 16384 91 92 #define BNX2I_SQ_WQE_SIZE 64 93 #define BNX2I_RQ_WQE_SIZE 256 94 #define BNX2I_CQE_SIZE 64 95 96 #define MB_KERNEL_CTX_SHIFT 8 97 #define MB_KERNEL_CTX_SIZE (1 << MB_KERNEL_CTX_SHIFT) 98 99 #define CTX_SHIFT 7 100 #define GET_CID_NUM(cid_addr) ((cid_addr) >> CTX_SHIFT) 101 102 #define CTX_OFFSET 0x10000 103 #define MAX_CID_CNT 0x4000 104 105 #define BNX2I_570X_PAGE_SIZE_DEFAULT 4096 106 107 /* 5709 context registers */ 108 #define BNX2_MQ_CONFIG2 0x00003d00 109 #define BNX2_MQ_CONFIG2_CONT_SZ (0x7L<<4) 110 #define BNX2_MQ_CONFIG2_FIRST_L4L5 (0x1fL<<8) 111 112 /* 57710's BAR2 is mapped to doorbell registers */ 113 #define BNX2X_DOORBELL_PCI_BAR 2 114 #define BNX2X_MAX_CQS 8 115 116 #define CNIC_ARM_CQE 1 117 #define CNIC_DISARM_CQE 0 118 119 #define REG_RD(__hba, offset) \ 120 readl(__hba->regview + offset) 121 #define REG_WR(__hba, offset, val) \ 122 writel(val, __hba->regview + offset) 123 124 125 /** 126 * struct generic_pdu_resc - login pdu resource structure 127 * 128 * @req_buf: driver buffer used to stage payload associated with 129 * the login request 130 * @req_dma_addr: dma address for iscsi login request payload buffer 131 * @req_buf_size: actual login request payload length 132 * @req_wr_ptr: pointer into login request buffer when next data is 133 * to be written 134 * @resp_hdr: iscsi header where iscsi login response header is to 135 * be recreated 136 * @resp_buf: buffer to stage login response payload 137 * @resp_dma_addr: login response payload buffer dma address 138 * @resp_buf_size: login response paylod length 139 * @resp_wr_ptr: pointer into login response buffer when next data is 140 * to be written 141 * @req_bd_tbl: iscsi login request payload BD table 142 * @req_bd_dma: login request BD table dma address 143 * @resp_bd_tbl: iscsi login response payload BD table 144 * @resp_bd_dma: login request BD table dma address 145 * 146 * following structure defines buffer info for generic pdus such as iSCSI Login, 147 * Logout and NOP 148 */ 149 struct generic_pdu_resc { 150 char *req_buf; 151 dma_addr_t req_dma_addr; 152 u32 req_buf_size; 153 char *req_wr_ptr; 154 struct iscsi_hdr resp_hdr; 155 char *resp_buf; 156 dma_addr_t resp_dma_addr; 157 u32 resp_buf_size; 158 char *resp_wr_ptr; 159 char *req_bd_tbl; 160 dma_addr_t req_bd_dma; 161 char *resp_bd_tbl; 162 dma_addr_t resp_bd_dma; 163 }; 164 165 166 /** 167 * struct bd_resc_page - tracks DMA'able memory allocated for BD tables 168 * 169 * @link: list head to link elements 170 * @max_ptrs: maximun pointers that can be stored in this page 171 * @num_valid: number of pointer valid in this page 172 * @page: base addess for page pointer array 173 * 174 * structure to track DMA'able memory allocated for command BD tables 175 */ 176 struct bd_resc_page { 177 struct list_head link; 178 u32 max_ptrs; 179 u32 num_valid; 180 void *page[1]; 181 }; 182 183 184 /** 185 * struct io_bdt - I/O buffer destricptor table 186 * 187 * @bd_tbl: BD table's virtual address 188 * @bd_tbl_dma: BD table's dma address 189 * @bd_valid: num valid BD entries 190 * 191 * IO BD table 192 */ 193 struct io_bdt { 194 struct iscsi_bd *bd_tbl; 195 dma_addr_t bd_tbl_dma; 196 u16 bd_valid; 197 }; 198 199 200 /** 201 * bnx2i_cmd - iscsi command structure 202 * 203 * @scsi_cmd: SCSI-ML task pointer corresponding to this iscsi cmd 204 * @sg: SG list 205 * @io_tbl: buffer descriptor (BD) table 206 * @bd_tbl_dma: buffer descriptor (BD) table's dma address 207 */ 208 struct bnx2i_cmd { 209 struct iscsi_hdr hdr; 210 struct bnx2i_conn *conn; 211 struct scsi_cmnd *scsi_cmd; 212 struct scatterlist *sg; 213 struct io_bdt io_tbl; 214 dma_addr_t bd_tbl_dma; 215 struct bnx2i_cmd_request req; 216 }; 217 218 219 /** 220 * struct bnx2i_conn - iscsi connection structure 221 * 222 * @cls_conn: pointer to iscsi cls conn 223 * @hba: adapter structure pointer 224 * @iscsi_conn_cid: iscsi conn id 225 * @fw_cid: firmware iscsi context id 226 * @ep: endpoint structure pointer 227 * @gen_pdu: login/nopout/logout pdu resources 228 * @violation_notified: bit mask used to track iscsi error/warning messages 229 * already printed out 230 * 231 * iSCSI connection structure 232 */ 233 struct bnx2i_conn { 234 struct iscsi_cls_conn *cls_conn; 235 struct bnx2i_hba *hba; 236 struct completion cmd_cleanup_cmpl; 237 238 u32 iscsi_conn_cid; 239 #define BNX2I_CID_RESERVED 0x5AFF 240 u32 fw_cid; 241 242 struct timer_list poll_timer; 243 /* 244 * Queue Pair (QP) related structure elements. 245 */ 246 struct bnx2i_endpoint *ep; 247 248 /* 249 * Buffer for login negotiation process 250 */ 251 struct generic_pdu_resc gen_pdu; 252 u64 violation_notified; 253 }; 254 255 256 257 /** 258 * struct iscsi_cid_queue - Per adapter iscsi cid queue 259 * 260 * @cid_que_base: queue base memory 261 * @cid_que: queue memory pointer 262 * @cid_q_prod_idx: produce index 263 * @cid_q_cons_idx: consumer index 264 * @cid_q_max_idx: max index. used to detect wrap around condition 265 * @cid_free_cnt: queue size 266 * @conn_cid_tbl: iscsi cid to conn structure mapping table 267 * 268 * Per adapter iSCSI CID Queue 269 */ 270 struct iscsi_cid_queue { 271 void *cid_que_base; 272 u32 *cid_que; 273 u32 cid_q_prod_idx; 274 u32 cid_q_cons_idx; 275 u32 cid_q_max_idx; 276 u32 cid_free_cnt; 277 struct bnx2i_conn **conn_cid_tbl; 278 }; 279 280 /** 281 * struct bnx2i_hba - bnx2i adapter structure 282 * 283 * @link: list head to link elements 284 * @cnic: pointer to cnic device 285 * @pcidev: pointer to pci dev 286 * @netdev: pointer to netdev structure 287 * @regview: mapped PCI register space 288 * @age: age, incremented by every recovery 289 * @cnic_dev_type: cnic device type, 5706/5708/5709/57710 290 * @mail_queue_access: mailbox queue access mode, applicable to 5709 only 291 * @reg_with_cnic: indicates whether the device is register with CNIC 292 * @adapter_state: adapter state, UP, GOING_DOWN, LINK_DOWN 293 * @mtu_supported: Ethernet MTU supported 294 * @shost: scsi host pointer 295 * @max_sqes: SQ size 296 * @max_rqes: RQ size 297 * @max_cqes: CQ size 298 * @num_ccell: number of command cells per connection 299 * @ofld_conns_active: active connection list 300 * @eh_wait: wait queue for the endpoint to shutdown 301 * @max_active_conns: max offload connections supported by this device 302 * @cid_que: iscsi cid queue 303 * @ep_rdwr_lock: read / write lock to synchronize various ep lists 304 * @ep_ofld_list: connection list for pending offload completion 305 * @ep_active_list: connection list for active offload endpoints 306 * @ep_destroy_list: connection list for pending offload completion 307 * @mp_bd_tbl: BD table to be used with middle path requests 308 * @mp_bd_dma: DMA address of 'mp_bd_tbl' memory buffer 309 * @dummy_buffer: Dummy buffer to be used with zero length scsicmd reqs 310 * @dummy_buf_dma: DMA address of 'dummy_buffer' memory buffer 311 * @lock: lock to synchonize access to hba structure 312 * @hba_shutdown_tmo: Timeout value to shutdown each connection 313 * @conn_teardown_tmo: Timeout value to tear down each connection 314 * @conn_ctx_destroy_tmo: Timeout value to destroy context of each connection 315 * @pci_did: PCI device ID 316 * @pci_vid: PCI vendor ID 317 * @pci_sdid: PCI subsystem device ID 318 * @pci_svid: PCI subsystem vendor ID 319 * @pci_func: PCI function number in system pci tree 320 * @pci_devno: PCI device number in system pci tree 321 * @num_wqe_sent: statistic counter, total wqe's sent 322 * @num_cqe_rcvd: statistic counter, total cqe's received 323 * @num_intr_claimed: statistic counter, total interrupts claimed 324 * @link_changed_count: statistic counter, num of link change notifications 325 * received 326 * @ipaddr_changed_count: statistic counter, num times IP address changed while 327 * at least one connection is offloaded 328 * @num_sess_opened: statistic counter, total num sessions opened 329 * @num_conn_opened: statistic counter, total num conns opened on this hba 330 * @ctx_ccell_tasks: captures number of ccells and tasks supported by 331 * currently offloaded connection, used to decode 332 * context memory 333 * 334 * Adapter Data Structure 335 */ 336 struct bnx2i_hba { 337 struct list_head link; 338 struct cnic_dev *cnic; 339 struct pci_dev *pcidev; 340 struct net_device *netdev; 341 void __iomem *regview; 342 343 u32 age; 344 unsigned long cnic_dev_type; 345 #define BNX2I_NX2_DEV_5706 0x0 346 #define BNX2I_NX2_DEV_5708 0x1 347 #define BNX2I_NX2_DEV_5709 0x2 348 #define BNX2I_NX2_DEV_57710 0x3 349 u32 mail_queue_access; 350 #define BNX2I_MQ_KERNEL_MODE 0x0 351 #define BNX2I_MQ_KERNEL_BYPASS_MODE 0x1 352 #define BNX2I_MQ_BIN_MODE 0x2 353 unsigned long reg_with_cnic; 354 #define BNX2I_CNIC_REGISTERED 1 355 356 unsigned long adapter_state; 357 #define ADAPTER_STATE_UP 0 358 #define ADAPTER_STATE_GOING_DOWN 1 359 #define ADAPTER_STATE_LINK_DOWN 2 360 #define ADAPTER_STATE_INIT_FAILED 31 361 unsigned int mtu_supported; 362 #define BNX2I_MAX_MTU_SUPPORTED 1500 363 364 struct Scsi_Host *shost; 365 366 u32 max_sqes; 367 u32 max_rqes; 368 u32 max_cqes; 369 u32 num_ccell; 370 371 int ofld_conns_active; 372 wait_queue_head_t eh_wait; 373 374 int max_active_conns; 375 struct iscsi_cid_queue cid_que; 376 377 rwlock_t ep_rdwr_lock; 378 struct list_head ep_ofld_list; 379 struct list_head ep_active_list; 380 struct list_head ep_destroy_list; 381 382 /* 383 * BD table to be used with MP (Middle Path requests. 384 */ 385 char *mp_bd_tbl; 386 dma_addr_t mp_bd_dma; 387 char *dummy_buffer; 388 dma_addr_t dummy_buf_dma; 389 390 spinlock_t lock; /* protects hba structure access */ 391 struct mutex net_dev_lock;/* sync net device access */ 392 393 int hba_shutdown_tmo; 394 int conn_teardown_tmo; 395 int conn_ctx_destroy_tmo; 396 /* 397 * PCI related info. 398 */ 399 u16 pci_did; 400 u16 pci_vid; 401 u16 pci_sdid; 402 u16 pci_svid; 403 u16 pci_func; 404 u16 pci_devno; 405 406 /* 407 * Following are a bunch of statistics useful during development 408 * and later stage for score boarding. 409 */ 410 u32 num_wqe_sent; 411 u32 num_cqe_rcvd; 412 u32 num_intr_claimed; 413 u32 link_changed_count; 414 u32 ipaddr_changed_count; 415 u32 num_sess_opened; 416 u32 num_conn_opened; 417 unsigned int ctx_ccell_tasks; 418 }; 419 420 421 /******************************************************************************* 422 * QP [ SQ / RQ / CQ ] info. 423 ******************************************************************************/ 424 425 /* 426 * SQ/RQ/CQ generic structure definition 427 */ 428 struct sqe { 429 u8 sqe_byte[BNX2I_SQ_WQE_SIZE]; 430 }; 431 432 struct rqe { 433 u8 rqe_byte[BNX2I_RQ_WQE_SIZE]; 434 }; 435 436 struct cqe { 437 u8 cqe_byte[BNX2I_CQE_SIZE]; 438 }; 439 440 441 enum { 442 #if defined(__LITTLE_ENDIAN) 443 CNIC_EVENT_COAL_INDEX = 0x0, 444 CNIC_SEND_DOORBELL = 0x4, 445 CNIC_EVENT_CQ_ARM = 0x7, 446 CNIC_RECV_DOORBELL = 0x8 447 #elif defined(__BIG_ENDIAN) 448 CNIC_EVENT_COAL_INDEX = 0x2, 449 CNIC_SEND_DOORBELL = 0x6, 450 CNIC_EVENT_CQ_ARM = 0x4, 451 CNIC_RECV_DOORBELL = 0xa 452 #endif 453 }; 454 455 456 /* 457 * CQ DB 458 */ 459 struct bnx2x_iscsi_cq_pend_cmpl { 460 /* CQ producer, updated by Ustorm */ 461 u16 ustrom_prod; 462 /* CQ pending completion counter */ 463 u16 pend_cntr; 464 }; 465 466 467 struct bnx2i_5771x_cq_db { 468 struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS]; 469 /* CQ pending completion ITT array */ 470 u16 itt[BNX2X_MAX_CQS]; 471 /* Cstorm CQ sequence to notify array, updated by driver */; 472 u16 sqn[BNX2X_MAX_CQS]; 473 u32 reserved[4] /* 16 byte allignment */; 474 }; 475 476 477 struct bnx2i_5771x_sq_rq_db { 478 u16 prod_idx; 479 u8 reserved0[14]; /* Pad structure size to 16 bytes */ 480 }; 481 482 483 struct bnx2i_5771x_dbell_hdr { 484 u8 header; 485 /* 1 for rx doorbell, 0 for tx doorbell */ 486 #define B577XX_DOORBELL_HDR_RX (0x1<<0) 487 #define B577XX_DOORBELL_HDR_RX_SHIFT 0 488 /* 0 for normal doorbell, 1 for advertise wnd doorbell */ 489 #define B577XX_DOORBELL_HDR_DB_TYPE (0x1<<1) 490 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT 1 491 /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */ 492 #define B577XX_DOORBELL_HDR_DPM_SIZE (0x3<<2) 493 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT 2 494 /* connection type */ 495 #define B577XX_DOORBELL_HDR_CONN_TYPE (0xF<<4) 496 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT 4 497 }; 498 499 struct bnx2i_5771x_dbell { 500 struct bnx2i_5771x_dbell_hdr dbell; 501 u8 pad[3]; 502 503 }; 504 505 /** 506 * struct qp_info - QP (share queue region) atrributes structure 507 * 508 * @ctx_base: ioremapped pci register base to access doorbell register 509 * pertaining to this offloaded connection 510 * @sq_virt: virtual address of send queue (SQ) region 511 * @sq_phys: DMA address of SQ memory region 512 * @sq_mem_size: SQ size 513 * @sq_prod_qe: SQ producer entry pointer 514 * @sq_cons_qe: SQ consumer entry pointer 515 * @sq_first_qe: virtaul address of first entry in SQ 516 * @sq_last_qe: virtaul address of last entry in SQ 517 * @sq_prod_idx: SQ producer index 518 * @sq_cons_idx: SQ consumer index 519 * @sqe_left: number sq entry left 520 * @sq_pgtbl_virt: page table describing buffer consituting SQ region 521 * @sq_pgtbl_phys: dma address of 'sq_pgtbl_virt' 522 * @sq_pgtbl_size: SQ page table size 523 * @cq_virt: virtual address of completion queue (CQ) region 524 * @cq_phys: DMA address of RQ memory region 525 * @cq_mem_size: CQ size 526 * @cq_prod_qe: CQ producer entry pointer 527 * @cq_cons_qe: CQ consumer entry pointer 528 * @cq_first_qe: virtaul address of first entry in CQ 529 * @cq_last_qe: virtaul address of last entry in CQ 530 * @cq_prod_idx: CQ producer index 531 * @cq_cons_idx: CQ consumer index 532 * @cqe_left: number cq entry left 533 * @cqe_size: size of each CQ entry 534 * @cqe_exp_seq_sn: next expected CQE sequence number 535 * @cq_pgtbl_virt: page table describing buffer consituting CQ region 536 * @cq_pgtbl_phys: dma address of 'cq_pgtbl_virt' 537 * @cq_pgtbl_size: CQ page table size 538 * @rq_virt: virtual address of receive queue (RQ) region 539 * @rq_phys: DMA address of RQ memory region 540 * @rq_mem_size: RQ size 541 * @rq_prod_qe: RQ producer entry pointer 542 * @rq_cons_qe: RQ consumer entry pointer 543 * @rq_first_qe: virtaul address of first entry in RQ 544 * @rq_last_qe: virtaul address of last entry in RQ 545 * @rq_prod_idx: RQ producer index 546 * @rq_cons_idx: RQ consumer index 547 * @rqe_left: number rq entry left 548 * @rq_pgtbl_virt: page table describing buffer consituting RQ region 549 * @rq_pgtbl_phys: dma address of 'rq_pgtbl_virt' 550 * @rq_pgtbl_size: RQ page table size 551 * 552 * queue pair (QP) is a per connection shared data structure which is used 553 * to send work requests (SQ), receive completion notifications (CQ) 554 * and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure 555 * below holds queue memory, consumer/producer indexes and page table 556 * information 557 */ 558 struct qp_info { 559 void __iomem *ctx_base; 560 #define DPM_TRIGER_TYPE 0x40 561 562 #define BNX2I_570x_QUE_DB_SIZE 0 563 #define BNX2I_5771x_QUE_DB_SIZE 16 564 struct sqe *sq_virt; 565 dma_addr_t sq_phys; 566 u32 sq_mem_size; 567 568 struct sqe *sq_prod_qe; 569 struct sqe *sq_cons_qe; 570 struct sqe *sq_first_qe; 571 struct sqe *sq_last_qe; 572 u16 sq_prod_idx; 573 u16 sq_cons_idx; 574 u32 sqe_left; 575 576 void *sq_pgtbl_virt; 577 dma_addr_t sq_pgtbl_phys; 578 u32 sq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 579 580 struct cqe *cq_virt; 581 dma_addr_t cq_phys; 582 u32 cq_mem_size; 583 584 struct cqe *cq_prod_qe; 585 struct cqe *cq_cons_qe; 586 struct cqe *cq_first_qe; 587 struct cqe *cq_last_qe; 588 u16 cq_prod_idx; 589 u16 cq_cons_idx; 590 u32 cqe_left; 591 u32 cqe_size; 592 u32 cqe_exp_seq_sn; 593 594 void *cq_pgtbl_virt; 595 dma_addr_t cq_pgtbl_phys; 596 u32 cq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 597 598 struct rqe *rq_virt; 599 dma_addr_t rq_phys; 600 u32 rq_mem_size; 601 602 struct rqe *rq_prod_qe; 603 struct rqe *rq_cons_qe; 604 struct rqe *rq_first_qe; 605 struct rqe *rq_last_qe; 606 u16 rq_prod_idx; 607 u16 rq_cons_idx; 608 u32 rqe_left; 609 610 void *rq_pgtbl_virt; 611 dma_addr_t rq_pgtbl_phys; 612 u32 rq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 613 }; 614 615 616 617 /* 618 * CID handles 619 */ 620 struct ep_handles { 621 u32 fw_cid; 622 u32 drv_iscsi_cid; 623 u16 pg_cid; 624 u16 rsvd; 625 }; 626 627 628 enum { 629 EP_STATE_IDLE = 0x0, 630 EP_STATE_PG_OFLD_START = 0x1, 631 EP_STATE_PG_OFLD_COMPL = 0x2, 632 EP_STATE_OFLD_START = 0x4, 633 EP_STATE_OFLD_COMPL = 0x8, 634 EP_STATE_CONNECT_START = 0x10, 635 EP_STATE_CONNECT_COMPL = 0x20, 636 EP_STATE_ULP_UPDATE_START = 0x40, 637 EP_STATE_ULP_UPDATE_COMPL = 0x80, 638 EP_STATE_DISCONN_START = 0x100, 639 EP_STATE_DISCONN_COMPL = 0x200, 640 EP_STATE_CLEANUP_START = 0x400, 641 EP_STATE_CLEANUP_CMPL = 0x800, 642 EP_STATE_TCP_FIN_RCVD = 0x1000, 643 EP_STATE_TCP_RST_RCVD = 0x2000, 644 EP_STATE_LOGOUT_SENT = 0x4000, 645 EP_STATE_LOGOUT_RESP_RCVD = 0x8000, 646 EP_STATE_PG_OFLD_FAILED = 0x1000000, 647 EP_STATE_ULP_UPDATE_FAILED = 0x2000000, 648 EP_STATE_CLEANUP_FAILED = 0x4000000, 649 EP_STATE_OFLD_FAILED = 0x8000000, 650 EP_STATE_CONNECT_FAILED = 0x10000000, 651 EP_STATE_DISCONN_TIMEDOUT = 0x20000000, 652 EP_STATE_OFLD_FAILED_CID_BUSY = 0x80000000, 653 }; 654 655 /** 656 * struct bnx2i_endpoint - representation of tcp connection in NX2 world 657 * 658 * @link: list head to link elements 659 * @hba: adapter to which this connection belongs 660 * @conn: iscsi connection this EP is linked to 661 * @cls_ep: associated iSCSI endpoint pointer 662 * @sess: iscsi session this EP is linked to 663 * @cm_sk: cnic sock struct 664 * @hba_age: age to detect if 'iscsid' issues ep_disconnect() 665 * after HBA reset is completed by bnx2i/cnic/bnx2 666 * modules 667 * @state: tracks offload connection state machine 668 * @teardown_mode: indicates if conn teardown is abortive or orderly 669 * @qp: QP information 670 * @ids: contains chip allocated *context id* & driver assigned 671 * *iscsi cid* 672 * @ofld_timer: offload timer to detect timeout 673 * @ofld_wait: wait queue 674 * 675 * Endpoint Structure - equivalent of tcp socket structure 676 */ 677 struct bnx2i_endpoint { 678 struct list_head link; 679 struct bnx2i_hba *hba; 680 struct bnx2i_conn *conn; 681 struct iscsi_endpoint *cls_ep; 682 struct cnic_sock *cm_sk; 683 u32 hba_age; 684 u32 state; 685 unsigned long timestamp; 686 int num_active_cmds; 687 688 struct qp_info qp; 689 struct ep_handles ids; 690 #define ep_iscsi_cid ids.drv_iscsi_cid 691 #define ep_cid ids.fw_cid 692 #define ep_pg_cid ids.pg_cid 693 struct timer_list ofld_timer; 694 wait_queue_head_t ofld_wait; 695 }; 696 697 698 699 /* Global variables */ 700 extern unsigned int error_mask1, error_mask2; 701 extern u64 iscsi_error_mask; 702 extern unsigned int en_tcp_dack; 703 extern unsigned int event_coal_div; 704 extern unsigned int event_coal_min; 705 706 extern struct scsi_transport_template *bnx2i_scsi_xport_template; 707 extern struct iscsi_transport bnx2i_iscsi_transport; 708 extern struct cnic_ulp_ops bnx2i_cnic_cb; 709 710 extern unsigned int sq_size; 711 extern unsigned int rq_size; 712 713 extern struct device_attribute *bnx2i_dev_attributes[]; 714 715 716 717 /* 718 * Function Prototypes 719 */ 720 extern void bnx2i_identify_device(struct bnx2i_hba *hba); 721 722 extern void bnx2i_ulp_init(struct cnic_dev *dev); 723 extern void bnx2i_ulp_exit(struct cnic_dev *dev); 724 extern void bnx2i_start(void *handle); 725 extern void bnx2i_stop(void *handle); 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, 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 int 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 int 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