drivers/scsi/cxgbi/libcxgbi.h

   1 /*
   2  * libcxgbi.h: Chelsio common library for T3/T4 iSCSI driver.
   3  *
   4  * Copyright (c) 2010-2015 Chelsio Communications, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation.
   9  *
  10  * Written by: Karen Xie (kxie@chelsio.com)
  11  * Written by: Rakesh Ranjan (rranjan@chelsio.com)
  12  */
  13
  14 #ifndef __LIBCXGBI_H__
  15 #define __LIBCXGBI_H__
  16
  17 #include <linux/kernel.h>
  18 #include <linux/errno.h>
  19 #include <linux/types.h>
  20 #include <linux/debugfs.h>
  21 #include <linux/list.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/if_vlan.h>
  24 #include <linux/scatterlist.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/vmalloc.h>
  27 #include <linux/version.h>
  28 #include <scsi/scsi_device.h>
  29 #include <scsi/libiscsi_tcp.h>
  30
  31 #include <libcxgb_ppm.h>
  32
  33 enum cxgbi_dbg_flag {
  34         CXGBI_DBG_ISCSI,
  35         CXGBI_DBG_DDP,
  36         CXGBI_DBG_TOE,
  37         CXGBI_DBG_SOCK,
  38
  39         CXGBI_DBG_PDU_TX,
  40         CXGBI_DBG_PDU_RX,
  41         CXGBI_DBG_DEV,
  42 };
  43
  44 #define log_debug(level, fmt, ...)      \
  45         do {    \
  46                 if (dbg_level & (level)) \
  47                         pr_info(fmt, ##__VA_ARGS__); \
  48         } while (0)
  49
  50 #define pr_info_ipaddr(fmt_trail,                                       \
  51                         addr1, addr2, args_trail...)                    \
  52 do {                                                                    \
  53         if (!((1 << CXGBI_DBG_SOCK) & dbg_level))                       \
  54                 break;                                                  \
  55         pr_info("%pISpc - %pISpc, " fmt_trail,                          \
  56                 addr1, addr2, args_trail);                              \
  57 } while (0)
  58
  59 /* max. connections per adapter */
  60 #define CXGBI_MAX_CONN          16384
  61
  62 /* always allocate rooms for AHS */
  63 #define SKB_TX_ISCSI_PDU_HEADER_MAX     \
  64         (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE)
  65
  66 #define ISCSI_PDU_NONPAYLOAD_LEN        312 /* bhs(48) + ahs(256) + digest(8)*/
  67
  68 /*
  69  * align pdu size to multiple of 512 for better performance
  70  */
  71 #define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0)
  72
  73 #define ULP2_MODE_ISCSI         2
  74
  75 #define ULP2_MAX_PKT_SIZE       16224
  76 #define ULP2_MAX_PDU_PAYLOAD    \
  77         (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN)
  78
  79 /*
  80  * For iscsi connections HW may inserts digest bytes into the pdu. Those digest
  81  * bytes are not sent by the host but are part of the TCP payload and therefore
  82  * consume TCP sequence space.
  83  */
  84 static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 };
  85 static inline unsigned int cxgbi_ulp_extra_len(int submode)
  86 {
  87         return ulp2_extra_len[submode & 3];
  88 }
  89
  90 #define CPL_RX_DDP_STATUS_DDP_SHIFT     16 /* ddp'able */
  91 #define CPL_RX_DDP_STATUS_PAD_SHIFT     19 /* pad error */
  92 #define CPL_RX_DDP_STATUS_HCRC_SHIFT    20 /* hcrc error */
  93 #define CPL_RX_DDP_STATUS_DCRC_SHIFT    21 /* dcrc error */
  94
  95 /*
  96  * sge_opaque_hdr -
  97  * Opaque version of structure the SGE stores at skb->head of TX_DATA packets
  98  * and for which we must reserve space.
  99  */
 100 struct sge_opaque_hdr {
 101         void *dev;
 102         dma_addr_t addr[MAX_SKB_FRAGS + 1];
 103 };
 104
 105 struct cxgbi_sock {
 106         struct cxgbi_device *cdev;
 107
 108         int tid;
 109         int atid;
 110         unsigned long flags;
 111         unsigned int mtu;
 112         unsigned short rss_qid;
 113         unsigned short txq_idx;
 114         unsigned short advmss;
 115         unsigned int tx_chan;
 116         unsigned int rx_chan;
 117         unsigned int mss_idx;
 118         unsigned int smac_idx;
 119         unsigned char port_id;
 120         int wr_max_cred;
 121         int wr_cred;
 122         int wr_una_cred;
 123 #ifdef CONFIG_CHELSIO_T4_DCB
 124         u8 dcb_priority;
 125 #endif
 126         unsigned char hcrc_len;
 127         unsigned char dcrc_len;
 128
 129         void *l2t;
 130         struct sk_buff *wr_pending_head;
 131         struct sk_buff *wr_pending_tail;
 132         struct sk_buff *cpl_close;
 133         struct sk_buff *cpl_abort_req;
 134         struct sk_buff *cpl_abort_rpl;
 135         struct sk_buff *skb_ulp_lhdr;
 136         spinlock_t lock;
 137         struct kref refcnt;
 138         unsigned int state;
 139         unsigned int csk_family;
 140         union {
 141                 struct sockaddr_in saddr;
 142                 struct sockaddr_in6 saddr6;
 143         };
 144         union {
 145                 struct sockaddr_in daddr;
 146                 struct sockaddr_in6 daddr6;
 147         };
 148         struct dst_entry *dst;
 149         struct sk_buff_head receive_queue;
 150         struct sk_buff_head write_queue;
 151         struct timer_list retry_timer;
 152         struct completion cmpl;
 153         int err;
 154         rwlock_t callback_lock;
 155         void *user_data;
 156
 157         u32 rcv_nxt;
 158         u32 copied_seq;
 159         u32 rcv_wup;
 160         u32 snd_nxt;
 161         u32 snd_una;
 162         u32 write_seq;
 163         u32 snd_win;
 164         u32 rcv_win;
 165 };
 166
 167 /*
 168  * connection states
 169  */
 170 enum cxgbi_sock_states{
 171         CTP_CLOSED,
 172         CTP_CONNECTING,
 173         CTP_ACTIVE_OPEN,
 174         CTP_ESTABLISHED,
 175         CTP_ACTIVE_CLOSE,
 176         CTP_PASSIVE_CLOSE,
 177         CTP_CLOSE_WAIT_1,
 178         CTP_CLOSE_WAIT_2,
 179         CTP_ABORTING,
 180 };
 181
 182 /*
 183  * Connection flags -- many to track some close related events.
 184  */
 185 enum cxgbi_sock_flags {
 186         CTPF_ABORT_RPL_RCVD,    /*received one ABORT_RPL_RSS message */
 187         CTPF_ABORT_REQ_RCVD,    /*received one ABORT_REQ_RSS message */
 188         CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */
 189         CTPF_TX_DATA_SENT,      /* already sent a TX_DATA WR */
 190         CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */
 191         CTPF_HAS_ATID,          /* reserved atid */
 192         CTPF_HAS_TID,           /* reserved hw tid */
 193         CTPF_OFFLOAD_DOWN,      /* offload function off */
 194         CTPF_LOGOUT_RSP_RCVD,   /* received logout response */
 195 };
 196
 197 struct cxgbi_skb_rx_cb {
 198         __u32 ddigest;
 199         __u32 pdulen;
 200 };
 201
 202 struct cxgbi_skb_tx_cb {
 203         void *handle;
 204         void *arp_err_handler;
 205         struct sk_buff *wr_next;
 206 };
 207
 208 enum cxgbi_skcb_flags {
 209         SKCBF_TX_NEED_HDR,      /* packet needs a header */
 210         SKCBF_TX_MEM_WRITE,     /* memory write */
 211         SKCBF_TX_FLAG_COMPL,    /* wr completion flag */
 212         SKCBF_RX_COALESCED,     /* received whole pdu */
 213         SKCBF_RX_HDR,           /* received pdu header */
 214         SKCBF_RX_DATA,          /* received pdu payload */
 215         SKCBF_RX_STATUS,        /* received ddp status */
 216         SKCBF_RX_ISCSI_COMPL,   /* received iscsi completion */
 217         SKCBF_RX_DATA_DDPD,     /* pdu payload ddp'd */
 218         SKCBF_RX_HCRC_ERR,      /* header digest error */
 219         SKCBF_RX_DCRC_ERR,      /* data digest error */
 220         SKCBF_RX_PAD_ERR,       /* padding byte error */
 221 };
 222
 223 struct cxgbi_skb_cb {
 224         union {
 225                 struct cxgbi_skb_rx_cb rx;
 226                 struct cxgbi_skb_tx_cb tx;
 227         };
 228         unsigned char ulp_mode;
 229         unsigned long flags;
 230         unsigned int seq;
 231 };
 232
 233 #define CXGBI_SKB_CB(skb)       ((struct cxgbi_skb_cb *)&((skb)->cb[0]))
 234 #define cxgbi_skcb_flags(skb)           (CXGBI_SKB_CB(skb)->flags)
 235 #define cxgbi_skcb_ulp_mode(skb)        (CXGBI_SKB_CB(skb)->ulp_mode)
 236 #define cxgbi_skcb_tcp_seq(skb)         (CXGBI_SKB_CB(skb)->seq)
 237 #define cxgbi_skcb_rx_ddigest(skb)      (CXGBI_SKB_CB(skb)->rx.ddigest)
 238 #define cxgbi_skcb_rx_pdulen(skb)       (CXGBI_SKB_CB(skb)->rx.pdulen)
 239 #define cxgbi_skcb_tx_wr_next(skb)      (CXGBI_SKB_CB(skb)->tx.wr_next)
 240
 241 static inline void cxgbi_skcb_set_flag(struct sk_buff *skb,
 242                                         enum cxgbi_skcb_flags flag)
 243 {
 244         __set_bit(flag, &(cxgbi_skcb_flags(skb)));
 245 }
 246
 247 static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,
 248                                         enum cxgbi_skcb_flags flag)
 249 {
 250         __clear_bit(flag, &(cxgbi_skcb_flags(skb)));
 251 }
 252
 253 static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb,
 254                                        enum cxgbi_skcb_flags flag)
 255 {
 256         return test_bit(flag, &(cxgbi_skcb_flags(skb)));
 257 }
 258
 259 static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk,
 260                                         enum cxgbi_sock_flags flag)
 261 {
 262         __set_bit(flag, &csk->flags);
 263         log_debug(1 << CXGBI_DBG_SOCK,
 264                 "csk 0x%p,%u,0x%lx, bit %d.\n",
 265                 csk, csk->state, csk->flags, flag);
 266 }
 267
 268 static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk,
 269                                         enum cxgbi_sock_flags flag)
 270 {
 271         __clear_bit(flag, &csk->flags);
 272         log_debug(1 << CXGBI_DBG_SOCK,
 273                 "csk 0x%p,%u,0x%lx, bit %d.\n",
 274                 csk, csk->state, csk->flags, flag);
 275 }
 276
 277 static inline int cxgbi_sock_flag(struct cxgbi_sock *csk,
 278                                 enum cxgbi_sock_flags flag)
 279 {
 280         if (csk == NULL)
 281                 return 0;
 282         return test_bit(flag, &csk->flags);
 283 }
 284
 285 static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state)
 286 {
 287         log_debug(1 << CXGBI_DBG_SOCK,
 288                 "csk 0x%p,%u,0x%lx, state -> %u.\n",
 289                 csk, csk->state, csk->flags, state);
 290         csk->state = state;
 291 }
 292
 293 static inline void cxgbi_sock_free(struct kref *kref)
 294 {
 295         struct cxgbi_sock *csk = container_of(kref,
 296                                                 struct cxgbi_sock,
 297                                                 refcnt);
 298         if (csk) {
 299                 log_debug(1 << CXGBI_DBG_SOCK,
 300                         "free csk 0x%p, state %u, flags 0x%lx\n",
 301                         csk, csk->state, csk->flags);
 302                 kfree(csk);
 303         }
 304 }
 305
 306 static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk)
 307 {
 308         log_debug(1 << CXGBI_DBG_SOCK,
 309                 "%s, put csk 0x%p, ref %u-1.\n",
 310                 fn, csk, kref_read(&csk->refcnt));
 311         kref_put(&csk->refcnt, cxgbi_sock_free);
 312 }
 313 #define cxgbi_sock_put(csk)     __cxgbi_sock_put(__func__, csk)
 314
 315 static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk)
 316 {
 317         log_debug(1 << CXGBI_DBG_SOCK,
 318                 "%s, get csk 0x%p, ref %u+1.\n",
 319                 fn, csk, kref_read(&csk->refcnt));
 320         kref_get(&csk->refcnt);
 321 }
 322 #define cxgbi_sock_get(csk)     __cxgbi_sock_get(__func__, csk)
 323
 324 static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk)
 325 {
 326         return csk->state >= CTP_ACTIVE_CLOSE;
 327 }
 328
 329 static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk)
 330 {
 331         return csk->state == CTP_ESTABLISHED;
 332 }
 333
 334 static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk)
 335 {
 336         struct sk_buff *skb;
 337
 338         while ((skb = __skb_dequeue(&csk->write_queue)))
 339                 __kfree_skb(skb);
 340 }
 341
 342 static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win)
 343 {
 344         unsigned int wscale = 0;
 345
 346         while (wscale < 14 && (65535 << wscale) < win)
 347                 wscale++;
 348         return wscale;
 349 }
 350
 351 static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp)
 352 {
 353         struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp);
 354
 355         if (skb) {
 356                 __skb_put(skb, wrlen);
 357                 memset(skb->head, 0, wrlen + dlen);
 358         } else
 359                 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen);
 360         return skb;
 361 }
 362
 363
 364 /*
 365  * The number of WRs needed for an skb depends on the number of fragments
 366  * in the skb and whether it has any payload in its main body.  This maps the
 367  * length of the gather list represented by an skb into the # of necessary WRs.
 368  * The extra two fragments are for iscsi bhs and payload padding.
 369  */
 370 #define SKB_WR_LIST_SIZE         (MAX_SKB_FRAGS + 2)
 371
 372 static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk)
 373 {
 374         csk->wr_pending_head = csk->wr_pending_tail = NULL;
 375 }
 376
 377 static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk,
 378                                           struct sk_buff *skb)
 379 {
 380         cxgbi_skcb_tx_wr_next(skb) = NULL;
 381         /*
 382          * We want to take an extra reference since both us and the driver
 383          * need to free the packet before it's really freed.
 384          */
 385         skb_get(skb);
 386
 387         if (!csk->wr_pending_head)
 388                 csk->wr_pending_head = skb;
 389         else
 390                 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
 391         csk->wr_pending_tail = skb;
 392 }
 393
 394 static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk)
 395 {
 396         int n = 0;
 397         const struct sk_buff *skb = csk->wr_pending_head;
 398
 399         while (skb) {
 400                 n += skb->csum;
 401                 skb = cxgbi_skcb_tx_wr_next(skb);
 402         }
 403         return n;
 404 }
 405
 406 static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk)
 407 {
 408         return csk->wr_pending_head;
 409 }
 410
 411 static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk)
 412 {
 413         struct sk_buff *skb = csk->wr_pending_head;
 414
 415         if (likely(skb)) {
 416                 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb);
 417                 cxgbi_skcb_tx_wr_next(skb) = NULL;
 418         }
 419         return skb;
 420 }
 421
 422 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *);
 423 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *);
 424 void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *);
 425 void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int);
 426 void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *);
 427 void cxgbi_sock_closed(struct cxgbi_sock *);
 428 void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int);
 429 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *);
 430 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *);
 431 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32);
 432 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int,
 433                                 int);
 434 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int);
 435 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *);
 436
 437 struct cxgbi_hba {
 438         struct net_device *ndev;
 439         struct net_device *vdev;        /* vlan dev */
 440         struct Scsi_Host *shost;
 441         struct cxgbi_device *cdev;
 442         __be32 ipv4addr;
 443         unsigned char port_id;
 444 };
 445
 446 struct cxgbi_ports_map {
 447         unsigned int max_connect;
 448         unsigned int used;
 449         unsigned short sport_base;
 450         spinlock_t lock;
 451         unsigned int next;
 452         struct cxgbi_sock **port_csk;
 453 };
 454
 455 #define CXGBI_FLAG_DEV_T3               0x1
 456 #define CXGBI_FLAG_DEV_T4               0x2
 457 #define CXGBI_FLAG_ADAPTER_RESET        0x4
 458 #define CXGBI_FLAG_IPV4_SET             0x10
 459 #define CXGBI_FLAG_USE_PPOD_OFLDQ       0x40
 460 #define CXGBI_FLAG_DDP_OFF              0x100
 461
 462 struct cxgbi_device {
 463         struct list_head list_head;
 464         struct list_head rcu_node;
 465         unsigned int flags;
 466         struct net_device **ports;
 467         void *lldev;
 468         struct cxgbi_hba **hbas;
 469         const unsigned short *mtus;
 470         unsigned char nmtus;
 471         unsigned char nports;
 472         struct pci_dev *pdev;
 473         struct dentry *debugfs_root;
 474         struct iscsi_transport *itp;
 475         struct module *owner;
 476
 477         unsigned int pfvf;
 478         unsigned int rx_credit_thres;
 479         unsigned int skb_tx_rsvd;
 480         unsigned int skb_rx_extra;      /* for msg coalesced mode */
 481         unsigned int tx_max_size;
 482         unsigned int rx_max_size;
 483         unsigned int rxq_idx_cntr;
 484         struct cxgbi_ports_map pmap;
 485
 486         void (*dev_ddp_cleanup)(struct cxgbi_device *);
 487         struct cxgbi_ppm* (*cdev2ppm)(struct cxgbi_device *);
 488         int (*csk_ddp_set_map)(struct cxgbi_ppm *, struct cxgbi_sock *,
 489                                struct cxgbi_task_tag_info *);
 490         void (*csk_ddp_clear_map)(struct cxgbi_device *cdev,
 491                                   struct cxgbi_ppm *,
 492                                   struct cxgbi_task_tag_info *);
 493         int (*csk_ddp_setup_digest)(struct cxgbi_sock *,
 494                                     unsigned int, int, int);
 495         int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *,
 496                                    unsigned int, int);
 497
 498         void (*csk_release_offload_resources)(struct cxgbi_sock *);
 499         int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *);
 500         u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32);
 501         int (*csk_push_tx_frames)(struct cxgbi_sock *, int);
 502         void (*csk_send_abort_req)(struct cxgbi_sock *);
 503         void (*csk_send_close_req)(struct cxgbi_sock *);
 504         int (*csk_alloc_cpls)(struct cxgbi_sock *);
 505         int (*csk_init_act_open)(struct cxgbi_sock *);
 506
 507         void *dd_data;
 508 };
 509 #define cxgbi_cdev_priv(cdev)   ((cdev)->dd_data)
 510
 511 struct cxgbi_conn {
 512         struct cxgbi_endpoint *cep;
 513         struct iscsi_conn *iconn;
 514         struct cxgbi_hba *chba;
 515         u32 task_idx_bits;
 516         unsigned int ddp_full;
 517         unsigned int ddp_tag_full;
 518 };
 519
 520 struct cxgbi_endpoint {
 521         struct cxgbi_conn *cconn;
 522         struct cxgbi_hba *chba;
 523         struct cxgbi_sock *csk;
 524 };
 525
 526 #define MAX_PDU_FRAGS   ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
 527 struct cxgbi_task_data {
 528         unsigned short nr_frags;
 529         struct page_frag frags[MAX_PDU_FRAGS];
 530         struct sk_buff *skb;
 531         unsigned int dlen;
 532         unsigned int offset;
 533         unsigned int count;
 534         unsigned int sgoffset;
 535         struct cxgbi_task_tag_info ttinfo;
 536 };
 537 #define iscsi_task_cxgbi_data(task) \
 538         ((task)->dd_data + sizeof(struct iscsi_tcp_task))
 539
 540 static inline void *cxgbi_alloc_big_mem(unsigned int size,
 541                                         gfp_t gfp)
 542 {
 543         void *p = kzalloc(size, gfp | __GFP_NOWARN);
 544
 545         if (!p)
 546                 p = vzalloc(size);
 547
 548         return p;
 549 }
 550
 551 static inline void cxgbi_free_big_mem(void *addr)
 552 {
 553         kvfree(addr);
 554 }
 555
 556 static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr)
 557 {
 558         if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET)
 559                 chba->ipv4addr = ipaddr;
 560         else
 561                 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n",
 562                         chba->ndev->name);
 563 }
 564
 565 struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
 566 void cxgbi_device_unregister(struct cxgbi_device *);
 567 void cxgbi_device_unregister_all(unsigned int flag);
 568 struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
 569 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
 570 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *,
 571                                                      int *);
 572 int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int,
 573                         struct scsi_host_template *,
 574                         struct scsi_transport_template *);
 575 void cxgbi_hbas_remove(struct cxgbi_device *);
 576
 577 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
 578                         unsigned int max_conn);
 579 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev);
 580
 581 void cxgbi_conn_tx_open(struct cxgbi_sock *);
 582 void cxgbi_conn_pdu_ready(struct cxgbi_sock *);
 583 int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8);
 584 int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int);
 585 int cxgbi_conn_xmit_pdu(struct iscsi_task *);
 586
 587 void cxgbi_cleanup_task(struct iscsi_task *task);
 588
 589 umode_t cxgbi_attr_is_visible(int param_type, int param);
 590 void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *);
 591 int cxgbi_set_conn_param(struct iscsi_cls_conn *,
 592                         enum iscsi_param, char *, int);
 593 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *);
 594 struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32);
 595 int cxgbi_bind_conn(struct iscsi_cls_session *,
 596                         struct iscsi_cls_conn *, u64, int);
 597 void cxgbi_destroy_session(struct iscsi_cls_session *);
 598 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *,
 599                         u16, u16, u32);
 600 int cxgbi_set_host_param(struct Scsi_Host *,
 601                         enum iscsi_host_param, char *, int);
 602 int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *);
 603 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *,
 604                         struct sockaddr *, int);
 605 int cxgbi_ep_poll(struct iscsi_endpoint *, int);
 606 void cxgbi_ep_disconnect(struct iscsi_endpoint *);
 607
 608 int cxgbi_iscsi_init(struct iscsi_transport *,
 609                         struct scsi_transport_template **);
 610 void cxgbi_iscsi_cleanup(struct iscsi_transport *,
 611                         struct scsi_transport_template **);
 612 void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *);
 613 int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int,
 614                         unsigned int, unsigned int);
 615 int cxgbi_ddp_cleanup(struct cxgbi_device *);
 616 void cxgbi_ddp_page_size_factor(int *);
 617 void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *,
 618                             struct cxgbi_task_tag_info *,
 619                             struct scatterlist **sg_pp, unsigned int *sg_off);
 620 void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *,
 621                          struct cxgbi_tag_format *, unsigned int ppmax,
 622                          unsigned int llimit, unsigned int start,
 623                          unsigned int rsvd_factor);
 624 #endif  /*__LIBCXGBI_H__*/