drivers/scsi/bnx2fc/bnx2fc.h

   1 #ifndef _BNX2FC_H_
   2 #define _BNX2FC_H_
   3 /* bnx2fc.h: Broadcom NetXtreme II Linux FCoE offload driver.
   4  *
   5  * Copyright (c) 2008 - 2010 Broadcom Corporation
   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: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/kernel.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_ether.h>
  21 #include <linux/if_vlan.h>
  22 #include <linux/kthread.h>
  23 #include <linux/crc32.h>
  24 #include <linux/cpu.h>
  25 #include <linux/types.h>
  26 #include <linux/list.h>
  27 #include <linux/delay.h>
  28 #include <linux/timer.h>
  29 #include <linux/errno.h>
  30 #include <linux/pci.h>
  31 #include <linux/init.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/workqueue.h>
  34 #include <linux/mutex.h>
  35 #include <linux/spinlock.h>
  36 #include <linux/bitops.h>
  37 #include <linux/log2.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/sched.h>
  40 #include <linux/io.h>
  41
  42 #include <scsi/scsi.h>
  43 #include <scsi/scsi_host.h>
  44 #include <scsi/scsi_device.h>
  45 #include <scsi/scsi_cmnd.h>
  46 #include <scsi/scsi_eh.h>
  47 #include <scsi/scsi_tcq.h>
  48 #include <scsi/libfc.h>
  49 #include <scsi/libfcoe.h>
  50 #include <scsi/fc_encode.h>
  51 #include <scsi/scsi_transport.h>
  52 #include <scsi/scsi_transport_fc.h>
  53 #include <scsi/fc/fc_fip.h>
  54 #include <scsi/fc/fc_fc2.h>
  55 #include <scsi/fc_frame.h>
  56 #include <scsi/fc/fc_fcoe.h>
  57 #include <scsi/fc/fc_fcp.h>
  58
  59 #include "57xx_hsi_bnx2fc.h"
  60 #include "bnx2fc_debug.h"
  61 #include "../../net/cnic_if.h"
  62 #include "bnx2fc_constants.h"
  63
  64 #define BNX2FC_NAME             "bnx2fc"
  65 #define BNX2FC_VERSION          "1.0.0"
  66
  67 #define PFX                     "bnx2fc: "
  68
  69 #define BNX2X_DOORBELL_PCI_BAR          2
  70
  71 #define BNX2FC_MAX_BD_LEN               0xffff
  72 #define BNX2FC_BD_SPLIT_SZ              0x8000
  73 #define BNX2FC_MAX_BDS_PER_CMD          256
  74
  75 #define BNX2FC_SQ_WQES_MAX      256
  76
  77 #define BNX2FC_SCSI_MAX_SQES    ((3 * BNX2FC_SQ_WQES_MAX) / 8)
  78 #define BNX2FC_TM_MAX_SQES      ((BNX2FC_SQ_WQES_MAX) / 2)
  79 #define BNX2FC_ELS_MAX_SQES     (BNX2FC_TM_MAX_SQES - 1)
  80
  81 #define BNX2FC_RQ_WQES_MAX      16
  82 #define BNX2FC_CQ_WQES_MAX      (BNX2FC_SQ_WQES_MAX + BNX2FC_RQ_WQES_MAX)
  83
  84 #define BNX2FC_NUM_MAX_SESS     128
  85 #define BNX2FC_NUM_MAX_SESS_LOG (ilog2(BNX2FC_NUM_MAX_SESS))
  86
  87 #define BNX2FC_MAX_OUTSTANDING_CMNDS    4096
  88 #define BNX2FC_MIN_PAYLOAD              256
  89 #define BNX2FC_MAX_PAYLOAD              2048
  90
  91 #define BNX2FC_RQ_BUF_SZ                256
  92 #define BNX2FC_RQ_BUF_LOG_SZ            (ilog2(BNX2FC_RQ_BUF_SZ))
  93
  94 #define BNX2FC_SQ_WQE_SIZE              (sizeof(struct fcoe_sqe))
  95 #define BNX2FC_CQ_WQE_SIZE              (sizeof(struct fcoe_cqe))
  96 #define BNX2FC_RQ_WQE_SIZE              (BNX2FC_RQ_BUF_SZ)
  97 #define BNX2FC_XFERQ_WQE_SIZE           (sizeof(struct fcoe_xfrqe))
  98 #define BNX2FC_CONFQ_WQE_SIZE           (sizeof(struct fcoe_confqe))
  99 #define BNX2FC_5771X_DB_PAGE_SIZE       128
 100
 101 #define BNX2FC_MAX_TASKS                BNX2FC_MAX_OUTSTANDING_CMNDS
 102 #define BNX2FC_TASK_SIZE                128
 103 #define BNX2FC_TASKS_PER_PAGE           (PAGE_SIZE/BNX2FC_TASK_SIZE)
 104 #define BNX2FC_TASK_CTX_ARR_SZ          (BNX2FC_MAX_TASKS/BNX2FC_TASKS_PER_PAGE)
 105
 106 #define BNX2FC_MAX_ROWS_IN_HASH_TBL     8
 107 #define BNX2FC_HASH_TBL_CHUNK_SIZE      (16 * 1024)
 108
 109 #define BNX2FC_MAX_SEQS                 255
 110
 111 #define BNX2FC_READ                     (1 << 1)
 112 #define BNX2FC_WRITE                    (1 << 0)
 113
 114 #define BNX2FC_MIN_XID                  0
 115 #define BNX2FC_MAX_XID                  (BNX2FC_MAX_OUTSTANDING_CMNDS - 1)
 116 #define FCOE_MIN_XID                    (BNX2FC_MAX_OUTSTANDING_CMNDS)
 117 #define FCOE_MAX_XID            \
 118                         (BNX2FC_MAX_OUTSTANDING_CMNDS + (nr_cpu_ids * 256))
 119 #define BNX2FC_MAX_LUN                  0xFFFF
 120 #define BNX2FC_MAX_FCP_TGT              256
 121 #define BNX2FC_MAX_CMD_LEN              16
 122
 123 #define BNX2FC_TM_TIMEOUT               60      /* secs */
 124 #define BNX2FC_IO_TIMEOUT               20000UL /* msecs */
 125
 126 #define BNX2FC_WAIT_CNT                 120
 127 #define BNX2FC_FW_TIMEOUT               (3 * HZ)
 128
 129 #define PORT_MAX                        2
 130
 131 #define CMD_SCSI_STATUS(Cmnd)           ((Cmnd)->SCp.Status)
 132
 133 /* FC FCP Status */
 134 #define FC_GOOD                         0
 135
 136 #define BNX2FC_RNID_HBA                 0x7
 137
 138 /* bnx2fc driver uses only one instance of fcoe_percpu_s */
 139 extern struct fcoe_percpu_s bnx2fc_global;
 140
 141 extern struct workqueue_struct *bnx2fc_wq;
 142
 143 struct bnx2fc_percpu_s {
 144         struct task_struct *iothread;
 145         struct list_head work_list;
 146         spinlock_t fp_work_lock;
 147 };
 148
 149
 150 struct bnx2fc_hba {
 151         struct list_head link;
 152         struct cnic_dev *cnic;
 153         struct pci_dev *pcidev;
 154         struct net_device *netdev;
 155         struct net_device *phys_dev;
 156         unsigned long reg_with_cnic;
 157                 #define BNX2FC_CNIC_REGISTERED           1
 158         struct packet_type fcoe_packet_type;
 159         struct packet_type fip_packet_type;
 160         struct bnx2fc_cmd_mgr *cmd_mgr;
 161         struct workqueue_struct *timer_work_queue;
 162         struct kref kref;
 163         spinlock_t hba_lock;
 164         struct mutex hba_mutex;
 165         unsigned long adapter_state;
 166                 #define ADAPTER_STATE_UP                0
 167                 #define ADAPTER_STATE_GOING_DOWN        1
 168                 #define ADAPTER_STATE_LINK_DOWN         2
 169                 #define ADAPTER_STATE_READY             3
 170         u32 flags;
 171         unsigned long init_done;
 172                 #define BNX2FC_FW_INIT_DONE             0
 173                 #define BNX2FC_CTLR_INIT_DONE           1
 174                 #define BNX2FC_CREATE_DONE              2
 175         struct fcoe_ctlr ctlr;
 176         u8 vlan_enabled;
 177         int vlan_id;
 178         u32 next_conn_id;
 179         struct fcoe_task_ctx_entry **task_ctx;
 180         dma_addr_t *task_ctx_dma;
 181         struct regpair *task_ctx_bd_tbl;
 182         dma_addr_t task_ctx_bd_dma;
 183
 184         int hash_tbl_segment_count;
 185         void **hash_tbl_segments;
 186         void *hash_tbl_pbl;
 187         dma_addr_t hash_tbl_pbl_dma;
 188         struct fcoe_t2_hash_table_entry *t2_hash_tbl;
 189         dma_addr_t t2_hash_tbl_dma;
 190         char *t2_hash_tbl_ptr;
 191         dma_addr_t t2_hash_tbl_ptr_dma;
 192
 193         char *dummy_buffer;
 194         dma_addr_t dummy_buf_dma;
 195
 196         struct fcoe_statistics_params *stats_buffer;
 197         dma_addr_t stats_buf_dma;
 198
 199         /*
 200          * PCI related info.
 201          */
 202         u16 pci_did;
 203         u16 pci_vid;
 204         u16 pci_sdid;
 205         u16 pci_svid;
 206         u16 pci_func;
 207         u16 pci_devno;
 208
 209         struct task_struct *l2_thread;
 210
 211         /* linkdown handling */
 212         wait_queue_head_t shutdown_wait;
 213         int wait_for_link_down;
 214
 215         /*destroy handling */
 216         struct timer_list destroy_timer;
 217         wait_queue_head_t destroy_wait;
 218
 219         /* Active list of offloaded sessions */
 220         struct bnx2fc_rport *tgt_ofld_list[BNX2FC_NUM_MAX_SESS];
 221         int num_ofld_sess;
 222
 223         /* statistics */
 224         struct completion stat_req_done;
 225 };
 226
 227 #define bnx2fc_from_ctlr(fip) container_of(fip, struct bnx2fc_hba, ctlr)
 228
 229 struct bnx2fc_cmd_mgr {
 230         struct bnx2fc_hba *hba;
 231         u16 next_idx;
 232         struct list_head *free_list;
 233         spinlock_t *free_list_lock;
 234         struct io_bdt **io_bdt_pool;
 235         struct bnx2fc_cmd **cmds;
 236 };
 237
 238 struct bnx2fc_rport {
 239         struct fcoe_port *port;
 240         struct fc_rport *rport;
 241         struct fc_rport_priv *rdata;
 242         void __iomem *ctx_base;
 243 #define DPM_TRIGER_TYPE         0x40
 244         u32 fcoe_conn_id;
 245         u32 context_id;
 246         u32 sid;
 247
 248         unsigned long flags;
 249 #define BNX2FC_FLAG_SESSION_READY       0x1
 250 #define BNX2FC_FLAG_OFFLOADED           0x2
 251 #define BNX2FC_FLAG_DISABLED            0x3
 252 #define BNX2FC_FLAG_DESTROYED           0x4
 253 #define BNX2FC_FLAG_OFLD_REQ_CMPL       0x5
 254 #define BNX2FC_FLAG_DESTROY_CMPL        0x6
 255 #define BNX2FC_FLAG_CTX_ALLOC_FAILURE   0x7
 256 #define BNX2FC_FLAG_UPLD_REQ_COMPL      0x8
 257 #define BNX2FC_FLAG_EXPL_LOGO           0x9
 258
 259         u32 max_sqes;
 260         u32 max_rqes;
 261         u32 max_cqes;
 262
 263         struct fcoe_sqe *sq;
 264         dma_addr_t sq_dma;
 265         u16 sq_prod_idx;
 266         u8 sq_curr_toggle_bit;
 267         u32 sq_mem_size;
 268
 269         struct fcoe_cqe *cq;
 270         dma_addr_t cq_dma;
 271         u32 cq_cons_idx;
 272         u8 cq_curr_toggle_bit;
 273         u32 cq_mem_size;
 274
 275         void *rq;
 276         dma_addr_t rq_dma;
 277         u32 rq_prod_idx;
 278         u32 rq_cons_idx;
 279         u32 rq_mem_size;
 280
 281         void *rq_pbl;
 282         dma_addr_t rq_pbl_dma;
 283         u32 rq_pbl_size;
 284
 285         struct fcoe_xfrqe *xferq;
 286         dma_addr_t xferq_dma;
 287         u32 xferq_mem_size;
 288
 289         struct fcoe_confqe *confq;
 290         dma_addr_t confq_dma;
 291         u32 confq_mem_size;
 292
 293         void *confq_pbl;
 294         dma_addr_t confq_pbl_dma;
 295         u32 confq_pbl_size;
 296
 297         struct fcoe_conn_db *conn_db;
 298         dma_addr_t conn_db_dma;
 299         u32 conn_db_mem_size;
 300
 301         struct fcoe_sqe *lcq;
 302         dma_addr_t lcq_dma;
 303         u32 lcq_mem_size;
 304
 305         void *ofld_req[4];
 306         dma_addr_t ofld_req_dma[4];
 307         void *enbl_req;
 308         dma_addr_t enbl_req_dma;
 309
 310         spinlock_t tgt_lock;
 311         spinlock_t cq_lock;
 312         atomic_t num_active_ios;
 313         u32 flush_in_prog;
 314         unsigned long work_time_slice;
 315         unsigned long timestamp;
 316         struct list_head free_task_list;
 317         struct bnx2fc_cmd *pending_queue[BNX2FC_SQ_WQES_MAX+1];
 318         atomic_t pi;
 319         atomic_t ci;
 320         struct list_head active_cmd_queue;
 321         struct list_head els_queue;
 322         struct list_head io_retire_queue;
 323         struct list_head active_tm_queue;
 324
 325         struct timer_list ofld_timer;
 326         wait_queue_head_t ofld_wait;
 327
 328         struct timer_list upld_timer;
 329         wait_queue_head_t upld_wait;
 330 };
 331
 332 struct bnx2fc_mp_req {
 333         u8 tm_flags;
 334
 335         u32 req_len;
 336         void *req_buf;
 337         dma_addr_t req_buf_dma;
 338         struct fcoe_bd_ctx *mp_req_bd;
 339         dma_addr_t mp_req_bd_dma;
 340         struct fc_frame_header req_fc_hdr;
 341
 342         u32 resp_len;
 343         void *resp_buf;
 344         dma_addr_t resp_buf_dma;
 345         struct fcoe_bd_ctx *mp_resp_bd;
 346         dma_addr_t mp_resp_bd_dma;
 347         struct fc_frame_header resp_fc_hdr;
 348 };
 349
 350 struct bnx2fc_els_cb_arg {
 351         struct bnx2fc_cmd *aborted_io_req;
 352         struct bnx2fc_cmd *io_req;
 353         u16 l2_oxid;
 354 };
 355
 356 /* bnx2fc command structure */
 357 struct bnx2fc_cmd {
 358         struct list_head link;
 359         u8 on_active_queue;
 360         u8 on_tmf_queue;
 361         u8 cmd_type;
 362 #define BNX2FC_SCSI_CMD         1
 363 #define BNX2FC_TASK_MGMT_CMD            2
 364 #define BNX2FC_ABTS                     3
 365 #define BNX2FC_ELS                      4
 366 #define BNX2FC_CLEANUP                  5
 367         u8 io_req_flags;
 368         struct kref refcount;
 369         struct fcoe_port *port;
 370         struct bnx2fc_rport *tgt;
 371         struct scsi_cmnd *sc_cmd;
 372         struct bnx2fc_cmd_mgr *cmd_mgr;
 373         struct bnx2fc_mp_req mp_req;
 374         void (*cb_func)(struct bnx2fc_els_cb_arg *cb_arg);
 375         struct bnx2fc_els_cb_arg *cb_arg;
 376         struct delayed_work timeout_work; /* timer for ULP timeouts */
 377         struct completion tm_done;
 378         int wait_for_comp;
 379         u16 xid;
 380         struct fcoe_task_ctx_entry *task;
 381         struct io_bdt *bd_tbl;
 382         struct fcp_rsp *rsp;
 383         size_t data_xfer_len;
 384         unsigned long req_flags;
 385 #define BNX2FC_FLAG_ISSUE_RRQ           0x1
 386 #define BNX2FC_FLAG_ISSUE_ABTS          0x2
 387 #define BNX2FC_FLAG_ABTS_DONE           0x3
 388 #define BNX2FC_FLAG_TM_COMPL            0x4
 389 #define BNX2FC_FLAG_TM_TIMEOUT          0x5
 390 #define BNX2FC_FLAG_IO_CLEANUP          0x6
 391 #define BNX2FC_FLAG_RETIRE_OXID         0x7
 392 #define BNX2FC_FLAG_EH_ABORT            0x8
 393 #define BNX2FC_FLAG_IO_COMPL            0x9
 394 #define BNX2FC_FLAG_ELS_DONE            0xa
 395 #define BNX2FC_FLAG_ELS_TIMEOUT         0xb
 396         u32 fcp_resid;
 397         u32 fcp_rsp_len;
 398         u32 fcp_sns_len;
 399         u8 cdb_status; /* SCSI IO status */
 400         u8 fcp_status; /* FCP IO status */
 401         u8 fcp_rsp_code;
 402         u8 scsi_comp_flags;
 403 };
 404
 405 struct io_bdt {
 406         struct bnx2fc_cmd *io_req;
 407         struct fcoe_bd_ctx *bd_tbl;
 408         dma_addr_t bd_tbl_dma;
 409         u16 bd_valid;
 410 };
 411
 412 struct bnx2fc_work {
 413         struct list_head list;
 414         struct bnx2fc_rport *tgt;
 415         u16 wqe;
 416 };
 417 struct bnx2fc_unsol_els {
 418         struct fc_lport *lport;
 419         struct fc_frame *fp;
 420         struct work_struct unsol_els_work;
 421 };
 422
 423
 424
 425 struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type);
 426 void bnx2fc_cmd_release(struct kref *ref);
 427 int bnx2fc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd);
 428 int bnx2fc_send_fw_fcoe_init_msg(struct bnx2fc_hba *hba);
 429 int bnx2fc_send_fw_fcoe_destroy_msg(struct bnx2fc_hba *hba);
 430 int bnx2fc_send_session_ofld_req(struct fcoe_port *port,
 431                                         struct bnx2fc_rport *tgt);
 432 int bnx2fc_send_session_disable_req(struct fcoe_port *port,
 433                                     struct bnx2fc_rport *tgt);
 434 int bnx2fc_send_session_destroy_req(struct bnx2fc_hba *hba,
 435                                         struct bnx2fc_rport *tgt);
 436 int bnx2fc_map_doorbell(struct bnx2fc_rport *tgt);
 437 void bnx2fc_indicate_kcqe(void *context, struct kcqe *kcq[],
 438                                         u32 num_cqe);
 439 int bnx2fc_setup_task_ctx(struct bnx2fc_hba *hba);
 440 void bnx2fc_free_task_ctx(struct bnx2fc_hba *hba);
 441 int bnx2fc_setup_fw_resc(struct bnx2fc_hba *hba);
 442 void bnx2fc_free_fw_resc(struct bnx2fc_hba *hba);
 443 struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
 444                                                 u16 min_xid, u16 max_xid);
 445 void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr);
 446 void bnx2fc_get_link_state(struct bnx2fc_hba *hba);
 447 char *bnx2fc_get_next_rqe(struct bnx2fc_rport *tgt, u8 num_items);
 448 void bnx2fc_return_rqe(struct bnx2fc_rport *tgt, u8 num_items);
 449 int bnx2fc_get_paged_crc_eof(struct sk_buff *skb, int tlen);
 450 int bnx2fc_send_rrq(struct bnx2fc_cmd *aborted_io_req);
 451 int bnx2fc_send_adisc(struct bnx2fc_rport *tgt, struct fc_frame *fp);
 452 int bnx2fc_send_logo(struct bnx2fc_rport *tgt, struct fc_frame *fp);
 453 int bnx2fc_send_rls(struct bnx2fc_rport *tgt, struct fc_frame *fp);
 454 int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req);
 455 int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req);
 456 void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
 457                           unsigned int timer_msec);
 458 int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req);
 459 void bnx2fc_init_cleanup_task(struct bnx2fc_cmd *io_req,
 460                               struct fcoe_task_ctx_entry *task,
 461                               u16 orig_xid);
 462 void bnx2fc_init_mp_task(struct bnx2fc_cmd *io_req,
 463                          struct fcoe_task_ctx_entry *task);
 464 void bnx2fc_init_task(struct bnx2fc_cmd *io_req,
 465                              struct fcoe_task_ctx_entry *task);
 466 void bnx2fc_add_2_sq(struct bnx2fc_rport *tgt, u16 xid);
 467 void bnx2fc_ring_doorbell(struct bnx2fc_rport *tgt);
 468 int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd);
 469 int bnx2fc_eh_host_reset(struct scsi_cmnd *sc_cmd);
 470 int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd);
 471 int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd);
 472 void bnx2fc_rport_event_handler(struct fc_lport *lport,
 473                                 struct fc_rport_priv *rport,
 474                                 enum fc_rport_event event);
 475 void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
 476                                    struct fcoe_task_ctx_entry *task,
 477                                    u8 num_rq);
 478 void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
 479                                struct fcoe_task_ctx_entry *task,
 480                                u8 num_rq);
 481 void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
 482                                struct fcoe_task_ctx_entry *task,
 483                                u8 num_rq);
 484 void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
 485                              struct fcoe_task_ctx_entry *task,
 486                              u8 num_rq);
 487 void bnx2fc_process_els_compl(struct bnx2fc_cmd *els_req,
 488                               struct fcoe_task_ctx_entry *task,
 489                               u8 num_rq);
 490 void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
 491                            struct fcp_cmnd *fcp_cmnd);
 492
 493
 494
 495 void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt);
 496 struct fc_seq *bnx2fc_elsct_send(struct fc_lport *lport, u32 did,
 497                                       struct fc_frame *fp, unsigned int op,
 498                                       void (*resp)(struct fc_seq *,
 499                                                    struct fc_frame *,
 500                                                    void *),
 501                                       void *arg, u32 timeout);
 502 int bnx2fc_process_new_cqes(struct bnx2fc_rport *tgt);
 503 void bnx2fc_process_cq_compl(struct bnx2fc_rport *tgt, u16 wqe);
 504 struct bnx2fc_rport *bnx2fc_tgt_lookup(struct fcoe_port *port,
 505                                              u32 port_id);
 506 void bnx2fc_process_l2_frame_compl(struct bnx2fc_rport *tgt,
 507                                    unsigned char *buf,
 508                                    u32 frame_len, u16 l2_oxid);
 509 int bnx2fc_send_stat_req(struct bnx2fc_hba *hba);
 510
 511 #endif