1 /* bnx2i.h: Broadcom NetXtreme II iSCSI driver. 2 * 3 * Copyright (c) 2006 - 2012 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/delay.h> 26 #include <linux/sched.h> 27 #include <linux/in.h> 28 #include <linux/kfifo.h> 29 #include <linux/netdevice.h> 30 #include <linux/completion.h> 31 #include <linux/kthread.h> 32 #include <linux/cpu.h> 33 34 #include <scsi/scsi_cmnd.h> 35 #include <scsi/scsi_device.h> 36 #include <scsi/scsi_eh.h> 37 #include <scsi/scsi_host.h> 38 #include <scsi/scsi.h> 39 #include <scsi/iscsi_proto.h> 40 #include <scsi/libiscsi.h> 41 #include <scsi/scsi_transport_iscsi.h> 42 43 #include "../../net/ethernet/broadcom/cnic_if.h" 44 #include "57xx_iscsi_hsi.h" 45 #include "57xx_iscsi_constants.h" 46 47 #include "../../net/ethernet/broadcom/bnx2x/bnx2x_mfw_req.h" 48 49 #define BNX2_ISCSI_DRIVER_NAME "bnx2i" 50 51 #define BNX2I_MAX_ADAPTERS 8 52 53 #define ISCSI_MAX_CONNS_PER_HBA 128 54 #define ISCSI_MAX_SESS_PER_HBA ISCSI_MAX_CONNS_PER_HBA 55 #define ISCSI_MAX_CMDS_PER_SESS 128 56 57 /* Total active commands across all connections supported by devices */ 58 #define ISCSI_MAX_CMDS_PER_HBA_5708 (28 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 59 #define ISCSI_MAX_CMDS_PER_HBA_5709 (128 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 60 #define ISCSI_MAX_CMDS_PER_HBA_57710 (256 * (ISCSI_MAX_CMDS_PER_SESS - 1)) 61 62 #define ISCSI_MAX_BDS_PER_CMD 32 63 64 #define MAX_PAGES_PER_CTRL_STRUCT_POOL 8 65 #define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS 4 66 67 #define BNX2I_5771X_DBELL_PAGE_SIZE 128 68 69 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */ 70 #define MAX_BD_LENGTH 65535 71 #define BD_SPLIT_SIZE 32768 72 73 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */ 74 #define BNX2I_SQ_WQES_MIN 16 75 #define BNX2I_570X_SQ_WQES_MAX 128 76 #define BNX2I_5770X_SQ_WQES_MAX 512 77 #define BNX2I_570X_SQ_WQES_DEFAULT 128 78 #define BNX2I_5770X_SQ_WQES_DEFAULT 128 79 80 #define BNX2I_570X_CQ_WQES_MAX 128 81 #define BNX2I_5770X_CQ_WQES_MAX 512 82 83 #define BNX2I_RQ_WQES_MIN 16 84 #define BNX2I_RQ_WQES_MAX 32 85 #define BNX2I_RQ_WQES_DEFAULT 16 86 87 /* CCELLs per conn */ 88 #define BNX2I_CCELLS_MIN 16 89 #define BNX2I_CCELLS_MAX 96 90 #define BNX2I_CCELLS_DEFAULT 64 91 92 #define ITT_INVALID_SIGNATURE 0xFFFF 93 94 #define ISCSI_CMD_CLEANUP_TIMEOUT 100 95 96 #define BNX2I_CONN_CTX_BUF_SIZE 16384 97 98 #define BNX2I_SQ_WQE_SIZE 64 99 #define BNX2I_RQ_WQE_SIZE 256 100 #define BNX2I_CQE_SIZE 64 101 102 #define MB_KERNEL_CTX_SHIFT 8 103 #define MB_KERNEL_CTX_SIZE (1 << MB_KERNEL_CTX_SHIFT) 104 105 #define CTX_SHIFT 7 106 #define GET_CID_NUM(cid_addr) ((cid_addr) >> CTX_SHIFT) 107 108 #define CTX_OFFSET 0x10000 109 #define MAX_CID_CNT 0x4000 110 111 #define BNX2I_570X_PAGE_SIZE_DEFAULT 4096 112 113 /* 5709 context registers */ 114 #define BNX2_MQ_CONFIG2 0x00003d00 115 #define BNX2_MQ_CONFIG2_CONT_SZ (0x7L<<4) 116 #define BNX2_MQ_CONFIG2_FIRST_L4L5 (0x1fL<<8) 117 118 /* 57710's BAR2 is mapped to doorbell registers */ 119 #define BNX2X_DOORBELL_PCI_BAR 2 120 #define BNX2X_MAX_CQS 8 121 122 #define CNIC_ARM_CQE 1 123 #define CNIC_ARM_CQE_FP 2 124 #define CNIC_DISARM_CQE 0 125 126 #define REG_RD(__hba, offset) \ 127 readl(__hba->regview + offset) 128 #define REG_WR(__hba, offset, val) \ 129 writel(val, __hba->regview + offset) 130 131 #ifdef CONFIG_32BIT 132 #define GET_STATS_64(__hba, dst, field) \ 133 do { \ 134 spin_lock_bh(&__hba->stat_lock); \ 135 dst->field##_lo = __hba->stats.field##_lo; \ 136 dst->field##_hi = __hba->stats.field##_hi; \ 137 spin_unlock_bh(&__hba->stat_lock); \ 138 } while (0) 139 140 #define ADD_STATS_64(__hba, field, len) \ 141 do { \ 142 if (spin_trylock(&__hba->stat_lock)) { \ 143 if (__hba->stats.field##_lo + len < \ 144 __hba->stats.field##_lo) \ 145 __hba->stats.field##_hi++; \ 146 __hba->stats.field##_lo += len; \ 147 spin_unlock(&__hba->stat_lock); \ 148 } \ 149 } while (0) 150 151 #else 152 #define GET_STATS_64(__hba, dst, field) \ 153 do { \ 154 u64 val, *out; \ 155 \ 156 val = __hba->bnx2i_stats.field; \ 157 out = (u64 *)&__hba->stats.field##_lo; \ 158 *out = cpu_to_le64(val); \ 159 out = (u64 *)&dst->field##_lo; \ 160 *out = cpu_to_le64(val); \ 161 } while (0) 162 163 #define ADD_STATS_64(__hba, field, len) \ 164 do { \ 165 __hba->bnx2i_stats.field += len; \ 166 } while (0) 167 #endif 168 169 /** 170 * struct generic_pdu_resc - login pdu resource structure 171 * 172 * @req_buf: driver buffer used to stage payload associated with 173 * the login request 174 * @req_dma_addr: dma address for iscsi login request payload buffer 175 * @req_buf_size: actual login request payload length 176 * @req_wr_ptr: pointer into login request buffer when next data is 177 * to be written 178 * @resp_hdr: iscsi header where iscsi login response header is to 179 * be recreated 180 * @resp_buf: buffer to stage login response payload 181 * @resp_dma_addr: login response payload buffer dma address 182 * @resp_buf_size: login response paylod length 183 * @resp_wr_ptr: pointer into login response buffer when next data is 184 * to be written 185 * @req_bd_tbl: iscsi login request payload BD table 186 * @req_bd_dma: login request BD table dma address 187 * @resp_bd_tbl: iscsi login response payload BD table 188 * @resp_bd_dma: login request BD table dma address 189 * 190 * following structure defines buffer info for generic pdus such as iSCSI Login, 191 * Logout and NOP 192 */ 193 struct generic_pdu_resc { 194 char *req_buf; 195 dma_addr_t req_dma_addr; 196 u32 req_buf_size; 197 char *req_wr_ptr; 198 struct iscsi_hdr resp_hdr; 199 char *resp_buf; 200 dma_addr_t resp_dma_addr; 201 u32 resp_buf_size; 202 char *resp_wr_ptr; 203 char *req_bd_tbl; 204 dma_addr_t req_bd_dma; 205 char *resp_bd_tbl; 206 dma_addr_t resp_bd_dma; 207 }; 208 209 210 /** 211 * struct bd_resc_page - tracks DMA'able memory allocated for BD tables 212 * 213 * @link: list head to link elements 214 * @max_ptrs: maximun pointers that can be stored in this page 215 * @num_valid: number of pointer valid in this page 216 * @page: base addess for page pointer array 217 * 218 * structure to track DMA'able memory allocated for command BD tables 219 */ 220 struct bd_resc_page { 221 struct list_head link; 222 u32 max_ptrs; 223 u32 num_valid; 224 void *page[1]; 225 }; 226 227 228 /** 229 * struct io_bdt - I/O buffer destricptor table 230 * 231 * @bd_tbl: BD table's virtual address 232 * @bd_tbl_dma: BD table's dma address 233 * @bd_valid: num valid BD entries 234 * 235 * IO BD table 236 */ 237 struct io_bdt { 238 struct iscsi_bd *bd_tbl; 239 dma_addr_t bd_tbl_dma; 240 u16 bd_valid; 241 }; 242 243 244 /** 245 * bnx2i_cmd - iscsi command structure 246 * 247 * @hdr: iSCSI header 248 * @conn: iscsi_conn pointer 249 * @scsi_cmd: SCSI-ML task pointer corresponding to this iscsi cmd 250 * @sg: SG list 251 * @io_tbl: buffer descriptor (BD) table 252 * @bd_tbl_dma: buffer descriptor (BD) table's dma address 253 * @req: bnx2i specific command request struct 254 */ 255 struct bnx2i_cmd { 256 struct iscsi_hdr hdr; 257 struct bnx2i_conn *conn; 258 struct scsi_cmnd *scsi_cmd; 259 struct scatterlist *sg; 260 struct io_bdt io_tbl; 261 dma_addr_t bd_tbl_dma; 262 struct bnx2i_cmd_request req; 263 }; 264 265 266 /** 267 * struct bnx2i_conn - iscsi connection structure 268 * 269 * @cls_conn: pointer to iscsi cls conn 270 * @hba: adapter structure pointer 271 * @iscsi_conn_cid: iscsi conn id 272 * @fw_cid: firmware iscsi context id 273 * @ep: endpoint structure pointer 274 * @gen_pdu: login/nopout/logout pdu resources 275 * @violation_notified: bit mask used to track iscsi error/warning messages 276 * already printed out 277 * @work_cnt: keeps track of the number of outstanding work 278 * 279 * iSCSI connection structure 280 */ 281 struct bnx2i_conn { 282 struct iscsi_cls_conn *cls_conn; 283 struct bnx2i_hba *hba; 284 struct completion cmd_cleanup_cmpl; 285 286 u32 iscsi_conn_cid; 287 #define BNX2I_CID_RESERVED 0x5AFF 288 u32 fw_cid; 289 290 struct timer_list poll_timer; 291 /* 292 * Queue Pair (QP) related structure elements. 293 */ 294 struct bnx2i_endpoint *ep; 295 296 /* 297 * Buffer for login negotiation process 298 */ 299 struct generic_pdu_resc gen_pdu; 300 u64 violation_notified; 301 302 atomic_t work_cnt; 303 }; 304 305 306 307 /** 308 * struct iscsi_cid_queue - Per adapter iscsi cid queue 309 * 310 * @cid_que_base: queue base memory 311 * @cid_que: queue memory pointer 312 * @cid_q_prod_idx: produce index 313 * @cid_q_cons_idx: consumer index 314 * @cid_q_max_idx: max index. used to detect wrap around condition 315 * @cid_free_cnt: queue size 316 * @conn_cid_tbl: iscsi cid to conn structure mapping table 317 * 318 * Per adapter iSCSI CID Queue 319 */ 320 struct iscsi_cid_queue { 321 void *cid_que_base; 322 u32 *cid_que; 323 u32 cid_q_prod_idx; 324 u32 cid_q_cons_idx; 325 u32 cid_q_max_idx; 326 u32 cid_free_cnt; 327 struct bnx2i_conn **conn_cid_tbl; 328 }; 329 330 331 struct bnx2i_stats_info { 332 u64 rx_pdus; 333 u64 rx_bytes; 334 u64 tx_pdus; 335 u64 tx_bytes; 336 }; 337 338 339 /** 340 * struct bnx2i_hba - bnx2i adapter structure 341 * 342 * @link: list head to link elements 343 * @cnic: pointer to cnic device 344 * @pcidev: pointer to pci dev 345 * @netdev: pointer to netdev structure 346 * @regview: mapped PCI register space 347 * @age: age, incremented by every recovery 348 * @cnic_dev_type: cnic device type, 5706/5708/5709/57710 349 * @mail_queue_access: mailbox queue access mode, applicable to 5709 only 350 * @reg_with_cnic: indicates whether the device is register with CNIC 351 * @adapter_state: adapter state, UP, GOING_DOWN, LINK_DOWN 352 * @mtu_supported: Ethernet MTU supported 353 * @shost: scsi host pointer 354 * @max_sqes: SQ size 355 * @max_rqes: RQ size 356 * @max_cqes: CQ size 357 * @num_ccell: number of command cells per connection 358 * @ofld_conns_active: active connection list 359 * @eh_wait: wait queue for the endpoint to shutdown 360 * @max_active_conns: max offload connections supported by this device 361 * @cid_que: iscsi cid queue 362 * @ep_rdwr_lock: read / write lock to synchronize various ep lists 363 * @ep_ofld_list: connection list for pending offload completion 364 * @ep_active_list: connection list for active offload endpoints 365 * @ep_destroy_list: connection list for pending offload completion 366 * @mp_bd_tbl: BD table to be used with middle path requests 367 * @mp_bd_dma: DMA address of 'mp_bd_tbl' memory buffer 368 * @dummy_buffer: Dummy buffer to be used with zero length scsicmd reqs 369 * @dummy_buf_dma: DMA address of 'dummy_buffer' memory buffer 370 * @lock: lock to synchonize access to hba structure 371 * @hba_shutdown_tmo: Timeout value to shutdown each connection 372 * @conn_teardown_tmo: Timeout value to tear down each connection 373 * @conn_ctx_destroy_tmo: Timeout value to destroy context of each connection 374 * @pci_did: PCI device ID 375 * @pci_vid: PCI vendor ID 376 * @pci_sdid: PCI subsystem device ID 377 * @pci_svid: PCI subsystem vendor ID 378 * @pci_func: PCI function number in system pci tree 379 * @pci_devno: PCI device number in system pci tree 380 * @num_wqe_sent: statistic counter, total wqe's sent 381 * @num_cqe_rcvd: statistic counter, total cqe's received 382 * @num_intr_claimed: statistic counter, total interrupts claimed 383 * @link_changed_count: statistic counter, num of link change notifications 384 * received 385 * @ipaddr_changed_count: statistic counter, num times IP address changed while 386 * at least one connection is offloaded 387 * @num_sess_opened: statistic counter, total num sessions opened 388 * @num_conn_opened: statistic counter, total num conns opened on this hba 389 * @ctx_ccell_tasks: captures number of ccells and tasks supported by 390 * currently offloaded connection, used to decode 391 * context memory 392 * @stat_lock: spin lock used by the statistic collector (32 bit) 393 * @stats: local iSCSI statistic collection place holder 394 * 395 * Adapter Data Structure 396 */ 397 struct bnx2i_hba { 398 struct list_head link; 399 struct cnic_dev *cnic; 400 struct pci_dev *pcidev; 401 struct net_device *netdev; 402 void __iomem *regview; 403 resource_size_t reg_base; 404 405 u32 age; 406 unsigned long cnic_dev_type; 407 #define BNX2I_NX2_DEV_5706 0x0 408 #define BNX2I_NX2_DEV_5708 0x1 409 #define BNX2I_NX2_DEV_5709 0x2 410 #define BNX2I_NX2_DEV_57710 0x3 411 u32 mail_queue_access; 412 #define BNX2I_MQ_KERNEL_MODE 0x0 413 #define BNX2I_MQ_KERNEL_BYPASS_MODE 0x1 414 #define BNX2I_MQ_BIN_MODE 0x2 415 unsigned long reg_with_cnic; 416 #define BNX2I_CNIC_REGISTERED 1 417 418 unsigned long adapter_state; 419 #define ADAPTER_STATE_UP 0 420 #define ADAPTER_STATE_GOING_DOWN 1 421 #define ADAPTER_STATE_LINK_DOWN 2 422 #define ADAPTER_STATE_INIT_FAILED 31 423 unsigned int mtu_supported; 424 #define BNX2I_MAX_MTU_SUPPORTED 9000 425 426 struct Scsi_Host *shost; 427 428 u32 max_sqes; 429 u32 max_rqes; 430 u32 max_cqes; 431 u32 num_ccell; 432 433 int ofld_conns_active; 434 wait_queue_head_t eh_wait; 435 436 int max_active_conns; 437 struct iscsi_cid_queue cid_que; 438 439 rwlock_t ep_rdwr_lock; 440 struct list_head ep_ofld_list; 441 struct list_head ep_active_list; 442 struct list_head ep_destroy_list; 443 444 /* 445 * BD table to be used with MP (Middle Path requests. 446 */ 447 char *mp_bd_tbl; 448 dma_addr_t mp_bd_dma; 449 char *dummy_buffer; 450 dma_addr_t dummy_buf_dma; 451 452 spinlock_t lock; /* protects hba structure access */ 453 struct mutex net_dev_lock;/* sync net device access */ 454 455 int hba_shutdown_tmo; 456 int conn_teardown_tmo; 457 int conn_ctx_destroy_tmo; 458 /* 459 * PCI related info. 460 */ 461 u16 pci_did; 462 u16 pci_vid; 463 u16 pci_sdid; 464 u16 pci_svid; 465 u16 pci_func; 466 u16 pci_devno; 467 468 /* 469 * Following are a bunch of statistics useful during development 470 * and later stage for score boarding. 471 */ 472 u32 num_wqe_sent; 473 u32 num_cqe_rcvd; 474 u32 num_intr_claimed; 475 u32 link_changed_count; 476 u32 ipaddr_changed_count; 477 u32 num_sess_opened; 478 u32 num_conn_opened; 479 unsigned int ctx_ccell_tasks; 480 481 #ifdef CONFIG_32BIT 482 spinlock_t stat_lock; 483 #endif 484 struct bnx2i_stats_info bnx2i_stats; 485 struct iscsi_stats_info stats; 486 }; 487 488 489 /******************************************************************************* 490 * QP [ SQ / RQ / CQ ] info. 491 ******************************************************************************/ 492 493 /* 494 * SQ/RQ/CQ generic structure definition 495 */ 496 struct sqe { 497 u8 sqe_byte[BNX2I_SQ_WQE_SIZE]; 498 }; 499 500 struct rqe { 501 u8 rqe_byte[BNX2I_RQ_WQE_SIZE]; 502 }; 503 504 struct cqe { 505 u8 cqe_byte[BNX2I_CQE_SIZE]; 506 }; 507 508 509 enum { 510 #if defined(__LITTLE_ENDIAN) 511 CNIC_EVENT_COAL_INDEX = 0x0, 512 CNIC_SEND_DOORBELL = 0x4, 513 CNIC_EVENT_CQ_ARM = 0x7, 514 CNIC_RECV_DOORBELL = 0x8 515 #elif defined(__BIG_ENDIAN) 516 CNIC_EVENT_COAL_INDEX = 0x2, 517 CNIC_SEND_DOORBELL = 0x6, 518 CNIC_EVENT_CQ_ARM = 0x4, 519 CNIC_RECV_DOORBELL = 0xa 520 #endif 521 }; 522 523 524 /* 525 * CQ DB 526 */ 527 struct bnx2x_iscsi_cq_pend_cmpl { 528 /* CQ producer, updated by Ustorm */ 529 u16 ustrom_prod; 530 /* CQ pending completion counter */ 531 u16 pend_cntr; 532 }; 533 534 535 struct bnx2i_5771x_cq_db { 536 struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS]; 537 /* CQ pending completion ITT array */ 538 u16 itt[BNX2X_MAX_CQS]; 539 /* Cstorm CQ sequence to notify array, updated by driver */; 540 u16 sqn[BNX2X_MAX_CQS]; 541 u32 reserved[4] /* 16 byte allignment */; 542 }; 543 544 545 struct bnx2i_5771x_sq_rq_db { 546 u16 prod_idx; 547 u8 reserved0[62]; /* Pad structure size to 64 bytes */ 548 }; 549 550 551 struct bnx2i_5771x_dbell_hdr { 552 u8 header; 553 /* 1 for rx doorbell, 0 for tx doorbell */ 554 #define B577XX_DOORBELL_HDR_RX (0x1<<0) 555 #define B577XX_DOORBELL_HDR_RX_SHIFT 0 556 /* 0 for normal doorbell, 1 for advertise wnd doorbell */ 557 #define B577XX_DOORBELL_HDR_DB_TYPE (0x1<<1) 558 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT 1 559 /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */ 560 #define B577XX_DOORBELL_HDR_DPM_SIZE (0x3<<2) 561 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT 2 562 /* connection type */ 563 #define B577XX_DOORBELL_HDR_CONN_TYPE (0xF<<4) 564 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT 4 565 }; 566 567 struct bnx2i_5771x_dbell { 568 struct bnx2i_5771x_dbell_hdr dbell; 569 u8 pad[3]; 570 571 }; 572 573 /** 574 * struct qp_info - QP (share queue region) atrributes structure 575 * 576 * @ctx_base: ioremapped pci register base to access doorbell register 577 * pertaining to this offloaded connection 578 * @sq_virt: virtual address of send queue (SQ) region 579 * @sq_phys: DMA address of SQ memory region 580 * @sq_mem_size: SQ size 581 * @sq_prod_qe: SQ producer entry pointer 582 * @sq_cons_qe: SQ consumer entry pointer 583 * @sq_first_qe: virtual address of first entry in SQ 584 * @sq_last_qe: virtual address of last entry in SQ 585 * @sq_prod_idx: SQ producer index 586 * @sq_cons_idx: SQ consumer index 587 * @sqe_left: number sq entry left 588 * @sq_pgtbl_virt: page table describing buffer consituting SQ region 589 * @sq_pgtbl_phys: dma address of 'sq_pgtbl_virt' 590 * @sq_pgtbl_size: SQ page table size 591 * @cq_virt: virtual address of completion queue (CQ) region 592 * @cq_phys: DMA address of RQ memory region 593 * @cq_mem_size: CQ size 594 * @cq_prod_qe: CQ producer entry pointer 595 * @cq_cons_qe: CQ consumer entry pointer 596 * @cq_first_qe: virtual address of first entry in CQ 597 * @cq_last_qe: virtual address of last entry in CQ 598 * @cq_prod_idx: CQ producer index 599 * @cq_cons_idx: CQ consumer index 600 * @cqe_left: number cq entry left 601 * @cqe_size: size of each CQ entry 602 * @cqe_exp_seq_sn: next expected CQE sequence number 603 * @cq_pgtbl_virt: page table describing buffer consituting CQ region 604 * @cq_pgtbl_phys: dma address of 'cq_pgtbl_virt' 605 * @cq_pgtbl_size: CQ page table size 606 * @rq_virt: virtual address of receive queue (RQ) region 607 * @rq_phys: DMA address of RQ memory region 608 * @rq_mem_size: RQ size 609 * @rq_prod_qe: RQ producer entry pointer 610 * @rq_cons_qe: RQ consumer entry pointer 611 * @rq_first_qe: virtual address of first entry in RQ 612 * @rq_last_qe: virtual address of last entry in RQ 613 * @rq_prod_idx: RQ producer index 614 * @rq_cons_idx: RQ consumer index 615 * @rqe_left: number rq entry left 616 * @rq_pgtbl_virt: page table describing buffer consituting RQ region 617 * @rq_pgtbl_phys: dma address of 'rq_pgtbl_virt' 618 * @rq_pgtbl_size: RQ page table size 619 * 620 * queue pair (QP) is a per connection shared data structure which is used 621 * to send work requests (SQ), receive completion notifications (CQ) 622 * and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure 623 * below holds queue memory, consumer/producer indexes and page table 624 * information 625 */ 626 struct qp_info { 627 void __iomem *ctx_base; 628 #define DPM_TRIGER_TYPE 0x40 629 630 #define BNX2I_570x_QUE_DB_SIZE 0 631 #define BNX2I_5771x_QUE_DB_SIZE 16 632 struct sqe *sq_virt; 633 dma_addr_t sq_phys; 634 u32 sq_mem_size; 635 636 struct sqe *sq_prod_qe; 637 struct sqe *sq_cons_qe; 638 struct sqe *sq_first_qe; 639 struct sqe *sq_last_qe; 640 u16 sq_prod_idx; 641 u16 sq_cons_idx; 642 u32 sqe_left; 643 644 void *sq_pgtbl_virt; 645 dma_addr_t sq_pgtbl_phys; 646 u32 sq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 647 648 struct cqe *cq_virt; 649 dma_addr_t cq_phys; 650 u32 cq_mem_size; 651 652 struct cqe *cq_prod_qe; 653 struct cqe *cq_cons_qe; 654 struct cqe *cq_first_qe; 655 struct cqe *cq_last_qe; 656 u16 cq_prod_idx; 657 u16 cq_cons_idx; 658 u32 cqe_left; 659 u32 cqe_size; 660 u32 cqe_exp_seq_sn; 661 662 void *cq_pgtbl_virt; 663 dma_addr_t cq_pgtbl_phys; 664 u32 cq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 665 666 struct rqe *rq_virt; 667 dma_addr_t rq_phys; 668 u32 rq_mem_size; 669 670 struct rqe *rq_prod_qe; 671 struct rqe *rq_cons_qe; 672 struct rqe *rq_first_qe; 673 struct rqe *rq_last_qe; 674 u16 rq_prod_idx; 675 u16 rq_cons_idx; 676 u32 rqe_left; 677 678 void *rq_pgtbl_virt; 679 dma_addr_t rq_pgtbl_phys; 680 u32 rq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */ 681 }; 682 683 684 685 /* 686 * CID handles 687 */ 688 struct ep_handles { 689 u32 fw_cid; 690 u32 drv_iscsi_cid; 691 u16 pg_cid; 692 u16 rsvd; 693 }; 694 695 696 enum { 697 EP_STATE_IDLE = 0x0, 698 EP_STATE_PG_OFLD_START = 0x1, 699 EP_STATE_PG_OFLD_COMPL = 0x2, 700 EP_STATE_OFLD_START = 0x4, 701 EP_STATE_OFLD_COMPL = 0x8, 702 EP_STATE_CONNECT_START = 0x10, 703 EP_STATE_CONNECT_COMPL = 0x20, 704 EP_STATE_ULP_UPDATE_START = 0x40, 705 EP_STATE_ULP_UPDATE_COMPL = 0x80, 706 EP_STATE_DISCONN_START = 0x100, 707 EP_STATE_DISCONN_COMPL = 0x200, 708 EP_STATE_CLEANUP_START = 0x400, 709 EP_STATE_CLEANUP_CMPL = 0x800, 710 EP_STATE_TCP_FIN_RCVD = 0x1000, 711 EP_STATE_TCP_RST_RCVD = 0x2000, 712 EP_STATE_LOGOUT_SENT = 0x4000, 713 EP_STATE_LOGOUT_RESP_RCVD = 0x8000, 714 EP_STATE_PG_OFLD_FAILED = 0x1000000, 715 EP_STATE_ULP_UPDATE_FAILED = 0x2000000, 716 EP_STATE_CLEANUP_FAILED = 0x4000000, 717 EP_STATE_OFLD_FAILED = 0x8000000, 718 EP_STATE_CONNECT_FAILED = 0x10000000, 719 EP_STATE_DISCONN_TIMEDOUT = 0x20000000, 720 EP_STATE_OFLD_FAILED_CID_BUSY = 0x80000000, 721 }; 722 723 /** 724 * struct bnx2i_endpoint - representation of tcp connection in NX2 world 725 * 726 * @link: list head to link elements 727 * @hba: adapter to which this connection belongs 728 * @conn: iscsi connection this EP is linked to 729 * @cls_ep: associated iSCSI endpoint pointer 730 * @cm_sk: cnic sock struct 731 * @hba_age: age to detect if 'iscsid' issues ep_disconnect() 732 * after HBA reset is completed by bnx2i/cnic/bnx2 733 * modules 734 * @state: tracks offload connection state machine 735 * @timestamp: tracks the start time when the ep begins to connect 736 * @num_active_cmds: tracks the number of outstanding commands for this ep 737 * @ec_shift: the amount of shift as part of the event coal calc 738 * @qp: QP information 739 * @ids: contains chip allocated *context id* & driver assigned 740 * *iscsi cid* 741 * @ofld_timer: offload timer to detect timeout 742 * @ofld_wait: wait queue 743 * 744 * Endpoint Structure - equivalent of tcp socket structure 745 */ 746 struct bnx2i_endpoint { 747 struct list_head link; 748 struct bnx2i_hba *hba; 749 struct bnx2i_conn *conn; 750 struct iscsi_endpoint *cls_ep; 751 struct cnic_sock *cm_sk; 752 u32 hba_age; 753 u32 state; 754 unsigned long timestamp; 755 atomic_t num_active_cmds; 756 u32 ec_shift; 757 758 struct qp_info qp; 759 struct ep_handles ids; 760 #define ep_iscsi_cid ids.drv_iscsi_cid 761 #define ep_cid ids.fw_cid 762 #define ep_pg_cid ids.pg_cid 763 struct timer_list ofld_timer; 764 wait_queue_head_t ofld_wait; 765 }; 766 767 768 struct bnx2i_work { 769 struct list_head list; 770 struct iscsi_session *session; 771 struct bnx2i_conn *bnx2i_conn; 772 struct cqe cqe; 773 }; 774 775 struct bnx2i_percpu_s { 776 struct task_struct *iothread; 777 struct list_head work_list; 778 spinlock_t p_work_lock; 779 }; 780 781 782 /* Global variables */ 783 extern unsigned int error_mask1, error_mask2; 784 extern u64 iscsi_error_mask; 785 extern unsigned int en_tcp_dack; 786 extern unsigned int event_coal_div; 787 extern unsigned int event_coal_min; 788 789 extern struct scsi_transport_template *bnx2i_scsi_xport_template; 790 extern struct iscsi_transport bnx2i_iscsi_transport; 791 extern struct cnic_ulp_ops bnx2i_cnic_cb; 792 793 extern unsigned int sq_size; 794 extern unsigned int rq_size; 795 796 extern struct device_attribute *bnx2i_dev_attributes[]; 797 798 799 800 /* 801 * Function Prototypes 802 */ 803 extern void bnx2i_identify_device(struct bnx2i_hba *hba, struct cnic_dev *dev); 804 805 extern void bnx2i_ulp_init(struct cnic_dev *dev); 806 extern void bnx2i_ulp_exit(struct cnic_dev *dev); 807 extern void bnx2i_start(void *handle); 808 extern void bnx2i_stop(void *handle); 809 extern int bnx2i_get_stats(void *handle); 810 811 extern struct bnx2i_hba *get_adapter_list_head(void); 812 813 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, 814 u16 iscsi_cid); 815 816 int bnx2i_alloc_ep_pool(void); 817 void bnx2i_release_ep_pool(void); 818 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba); 819 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba); 820 821 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic); 822 823 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic); 824 void bnx2i_free_hba(struct bnx2i_hba *hba); 825 826 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len); 827 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count); 828 829 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd); 830 831 void bnx2i_drop_session(struct iscsi_cls_session *session); 832 833 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba); 834 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn, 835 struct iscsi_task *mtask); 836 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn, 837 struct iscsi_task *mtask); 838 extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn, 839 struct iscsi_task *mtask); 840 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn, 841 struct bnx2i_cmd *cmnd); 842 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn, 843 struct iscsi_task *mtask, 844 char *datap, int data_len, int unsol); 845 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn, 846 struct iscsi_task *mtask); 847 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, 848 struct bnx2i_cmd *cmd); 849 extern int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, 850 struct bnx2i_endpoint *ep); 851 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn); 852 extern int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, 853 struct bnx2i_endpoint *ep); 854 855 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, 856 struct bnx2i_endpoint *ep); 857 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba, 858 struct bnx2i_endpoint *ep); 859 extern void bnx2i_ep_ofld_timer(unsigned long data); 860 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list( 861 struct bnx2i_hba *hba, u32 iscsi_cid); 862 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list( 863 struct bnx2i_hba *hba, u32 iscsi_cid); 864 865 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep); 866 extern int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action); 867 868 extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep); 869 870 /* Debug related function prototypes */ 871 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn); 872 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn); 873 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn); 874 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn); 875 876 extern int bnx2i_percpu_io_thread(void *arg); 877 extern int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session, 878 struct bnx2i_conn *bnx2i_conn, 879 struct cqe *cqe); 880 #endif 881