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         unsigned char hcrc_len;
 124         unsigned char dcrc_len;
 125
 126         void *l2t;
 127         struct sk_buff *wr_pending_head;
 128         struct sk_buff *wr_pending_tail;
 129         struct sk_buff *cpl_close;
 130         struct sk_buff *cpl_abort_req;
 131         struct sk_buff *cpl_abort_rpl;
 132         struct sk_buff *skb_ulp_lhdr;
 133         spinlock_t lock;
 134         struct kref refcnt;
 135         unsigned int state;
 136         unsigned int csk_family;
 137         union {
 138                 struct sockaddr_in saddr;
 139                 struct sockaddr_in6 saddr6;
 140         };
 141         union {
 142                 struct sockaddr_in daddr;
 143                 struct sockaddr_in6 daddr6;
 144         };
 145         struct dst_entry *dst;
 146         struct sk_buff_head receive_queue;
 147         struct sk_buff_head write_queue;
 148         struct timer_list retry_timer;
 149         int err;
 150         rwlock_t callback_lock;
 151         void *user_data;
 152
 153         u32 rcv_nxt;
 154         u32 copied_seq;
 155         u32 rcv_wup;
 156         u32 snd_nxt;
 157         u32 snd_una;
 158         u32 write_seq;
 159         u32 snd_win;
 160         u32 rcv_win;
 161 };
 162
 163 /*
 164  * connection states
 165  */
 166 enum cxgbi_sock_states{
 167         CTP_CLOSED,
 168         CTP_CONNECTING,
 169         CTP_ACTIVE_OPEN,
 170         CTP_ESTABLISHED,
 171         CTP_ACTIVE_CLOSE,
 172         CTP_PASSIVE_CLOSE,
 173         CTP_CLOSE_WAIT_1,
 174         CTP_CLOSE_WAIT_2,
 175         CTP_ABORTING,
 176 };
 177
 178 /*
 179  * Connection flags -- many to track some close related events.
 180  */
 181 enum cxgbi_sock_flags {
 182         CTPF_ABORT_RPL_RCVD,    /*received one ABORT_RPL_RSS message */
 183         CTPF_ABORT_REQ_RCVD,    /*received one ABORT_REQ_RSS message */
 184         CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */
 185         CTPF_TX_DATA_SENT,      /* already sent a TX_DATA WR */
 186         CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */
 187         CTPF_HAS_ATID,          /* reserved atid */
 188         CTPF_HAS_TID,           /* reserved hw tid */
 189         CTPF_OFFLOAD_DOWN,      /* offload function off */
 190 };
 191
 192 struct cxgbi_skb_rx_cb {
 193         __u32 ddigest;
 194         __u32 pdulen;
 195 };
 196
 197 struct cxgbi_skb_tx_cb {
 198         void *l2t;
 199         struct sk_buff *wr_next;
 200 };
 201
 202 enum cxgbi_skcb_flags {
 203         SKCBF_TX_NEED_HDR,      /* packet needs a header */
 204         SKCBF_TX_MEM_WRITE,     /* memory write */
 205         SKCBF_TX_FLAG_COMPL,    /* wr completion flag */
 206         SKCBF_RX_COALESCED,     /* received whole pdu */
 207         SKCBF_RX_HDR,           /* received pdu header */
 208         SKCBF_RX_DATA,          /* received pdu payload */
 209         SKCBF_RX_STATUS,        /* received ddp status */
 210         SKCBF_RX_ISCSI_COMPL,   /* received iscsi completion */
 211         SKCBF_RX_DATA_DDPD,     /* pdu payload ddp'd */
 212         SKCBF_RX_HCRC_ERR,      /* header digest error */
 213         SKCBF_RX_DCRC_ERR,      /* data digest error */
 214         SKCBF_RX_PAD_ERR,       /* padding byte error */
 215 };
 216
 217 struct cxgbi_skb_cb {
 218         unsigned char ulp_mode;
 219         unsigned long flags;
 220         unsigned int seq;
 221         union {
 222                 struct cxgbi_skb_rx_cb rx;
 223                 struct cxgbi_skb_tx_cb tx;
 224         };
 225 };
 226
 227 #define CXGBI_SKB_CB(skb)       ((struct cxgbi_skb_cb *)&((skb)->cb[0]))
 228 #define cxgbi_skcb_flags(skb)           (CXGBI_SKB_CB(skb)->flags)
 229 #define cxgbi_skcb_ulp_mode(skb)        (CXGBI_SKB_CB(skb)->ulp_mode)
 230 #define cxgbi_skcb_tcp_seq(skb)         (CXGBI_SKB_CB(skb)->seq)
 231 #define cxgbi_skcb_rx_ddigest(skb)      (CXGBI_SKB_CB(skb)->rx.ddigest)
 232 #define cxgbi_skcb_rx_pdulen(skb)       (CXGBI_SKB_CB(skb)->rx.pdulen)
 233 #define cxgbi_skcb_tx_wr_next(skb)      (CXGBI_SKB_CB(skb)->tx.wr_next)
 234
 235 static inline void cxgbi_skcb_set_flag(struct sk_buff *skb,
 236                                         enum cxgbi_skcb_flags flag)
 237 {
 238         __set_bit(flag, &(cxgbi_skcb_flags(skb)));
 239 }
 240
 241 static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,
 242                                         enum cxgbi_skcb_flags flag)
 243 {
 244         __clear_bit(flag, &(cxgbi_skcb_flags(skb)));
 245 }
 246
 247 static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb,
 248                                        enum cxgbi_skcb_flags flag)
 249 {
 250         return test_bit(flag, &(cxgbi_skcb_flags(skb)));
 251 }
 252
 253 static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk,
 254                                         enum cxgbi_sock_flags flag)
 255 {
 256         __set_bit(flag, &csk->flags);
 257         log_debug(1 << CXGBI_DBG_SOCK,
 258                 "csk 0x%p,%u,0x%lx, bit %d.\n",
 259                 csk, csk->state, csk->flags, flag);
 260 }
 261
 262 static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk,
 263                                         enum cxgbi_sock_flags flag)
 264 {
 265         __clear_bit(flag, &csk->flags);
 266         log_debug(1 << CXGBI_DBG_SOCK,
 267                 "csk 0x%p,%u,0x%lx, bit %d.\n",
 268                 csk, csk->state, csk->flags, flag);
 269 }
 270
 271 static inline int cxgbi_sock_flag(struct cxgbi_sock *csk,
 272                                 enum cxgbi_sock_flags flag)
 273 {
 274         if (csk == NULL)
 275                 return 0;
 276         return test_bit(flag, &csk->flags);
 277 }
 278
 279 static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state)
 280 {
 281         log_debug(1 << CXGBI_DBG_SOCK,
 282                 "csk 0x%p,%u,0x%lx, state -> %u.\n",
 283                 csk, csk->state, csk->flags, state);
 284         csk->state = state;
 285 }
 286
 287 static inline void cxgbi_sock_free(struct kref *kref)
 288 {
 289         struct cxgbi_sock *csk = container_of(kref,
 290                                                 struct cxgbi_sock,
 291                                                 refcnt);
 292         if (csk) {
 293                 log_debug(1 << CXGBI_DBG_SOCK,
 294                         "free csk 0x%p, state %u, flags 0x%lx\n",
 295                         csk, csk->state, csk->flags);
 296                 kfree(csk);
 297         }
 298 }
 299
 300 static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk)
 301 {
 302         log_debug(1 << CXGBI_DBG_SOCK,
 303                 "%s, put csk 0x%p, ref %u-1.\n",
 304                 fn, csk, kref_read(&csk->refcnt));
 305         kref_put(&csk->refcnt, cxgbi_sock_free);
 306 }
 307 #define cxgbi_sock_put(csk)     __cxgbi_sock_put(__func__, csk)
 308
 309 static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk)
 310 {
 311         log_debug(1 << CXGBI_DBG_SOCK,
 312                 "%s, get csk 0x%p, ref %u+1.\n",
 313                 fn, csk, kref_read(&csk->refcnt));
 314         kref_get(&csk->refcnt);
 315 }
 316 #define cxgbi_sock_get(csk)     __cxgbi_sock_get(__func__, csk)
 317
 318 static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk)
 319 {
 320         return csk->state >= CTP_ACTIVE_CLOSE;
 321 }
 322
 323 static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk)
 324 {
 325         return csk->state == CTP_ESTABLISHED;
 326 }
 327
 328 static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk)
 329 {
 330         struct sk_buff *skb;
 331
 332         while ((skb = __skb_dequeue(&csk->write_queue)))
 333                 __kfree_skb(skb);
 334 }
 335
 336 static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win)
 337 {
 338         unsigned int wscale = 0;
 339
 340         while (wscale < 14 && (65535 << wscale) < win)
 341                 wscale++;
 342         return wscale;
 343 }
 344
 345 static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp)
 346 {
 347         struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp);
 348
 349         if (skb) {
 350                 __skb_put(skb, wrlen);
 351                 memset(skb->head, 0, wrlen + dlen);
 352         } else
 353                 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen);
 354         return skb;
 355 }
 356
 357
 358 /*
 359  * The number of WRs needed for an skb depends on the number of fragments
 360  * in the skb and whether it has any payload in its main body.  This maps the
 361  * length of the gather list represented by an skb into the # of necessary WRs.
 362  * The extra two fragments are for iscsi bhs and payload padding.
 363  */
 364 #define SKB_WR_LIST_SIZE         (MAX_SKB_FRAGS + 2)
 365
 366 static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk)
 367 {
 368         csk->wr_pending_head = csk->wr_pending_tail = NULL;
 369 }
 370
 371 static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk,
 372                                           struct sk_buff *skb)
 373 {
 374         cxgbi_skcb_tx_wr_next(skb) = NULL;
 375         /*
 376          * We want to take an extra reference since both us and the driver
 377          * need to free the packet before it's really freed. We know there's
 378          * just one user currently so we use atomic_set rather than skb_get
 379          * to avoid the atomic op.
 380          */
 381         atomic_set(&skb->users, 2);
 382
 383         if (!csk->wr_pending_head)
 384                 csk->wr_pending_head = skb;
 385         else
 386                 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
 387         csk->wr_pending_tail = skb;
 388 }
 389
 390 static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk)
 391 {
 392         int n = 0;
 393         const struct sk_buff *skb = csk->wr_pending_head;
 394
 395         while (skb) {
 396                 n += skb->csum;
 397                 skb = cxgbi_skcb_tx_wr_next(skb);
 398         }
 399         return n;
 400 }
 401
 402 static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk)
 403 {
 404         return csk->wr_pending_head;
 405 }
 406
 407 static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk)
 408 {
 409         struct sk_buff *skb = csk->wr_pending_head;
 410
 411         if (likely(skb)) {
 412                 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb);
 413                 cxgbi_skcb_tx_wr_next(skb) = NULL;
 414         }
 415         return skb;
 416 }
 417
 418 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *);
 419 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *);
 420 void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *);
 421 void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int);
 422 void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *);
 423 void cxgbi_sock_closed(struct cxgbi_sock *);
 424 void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int);
 425 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *);
 426 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *);
 427 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32);
 428 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int,
 429                                 int);
 430 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int);
 431 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *);
 432
 433 struct cxgbi_hba {
 434         struct net_device *ndev;
 435         struct net_device *vdev;        /* vlan dev */
 436         struct Scsi_Host *shost;
 437         struct cxgbi_device *cdev;
 438         __be32 ipv4addr;
 439         unsigned char port_id;
 440 };
 441
 442 struct cxgbi_ports_map {
 443         unsigned int max_connect;
 444         unsigned int used;
 445         unsigned short sport_base;
 446         spinlock_t lock;
 447         unsigned int next;
 448         struct cxgbi_sock **port_csk;
 449 };
 450
 451 #define CXGBI_FLAG_DEV_T3               0x1
 452 #define CXGBI_FLAG_DEV_T4               0x2
 453 #define CXGBI_FLAG_ADAPTER_RESET        0x4
 454 #define CXGBI_FLAG_IPV4_SET             0x10
 455 #define CXGBI_FLAG_USE_PPOD_OFLDQ       0x40
 456 #define CXGBI_FLAG_DDP_OFF              0x100
 457
 458 struct cxgbi_device {
 459         struct list_head list_head;
 460         struct list_head rcu_node;
 461         unsigned int flags;
 462         struct net_device **ports;
 463         void *lldev;
 464         struct cxgbi_hba **hbas;
 465         const unsigned short *mtus;
 466         unsigned char nmtus;
 467         unsigned char nports;
 468         struct pci_dev *pdev;
 469         struct dentry *debugfs_root;
 470         struct iscsi_transport *itp;
 471         struct module *owner;
 472
 473         unsigned int pfvf;
 474         unsigned int rx_credit_thres;
 475         unsigned int skb_tx_rsvd;
 476         unsigned int skb_rx_extra;      /* for msg coalesced mode */
 477         unsigned int tx_max_size;
 478         unsigned int rx_max_size;
 479         struct cxgbi_ports_map pmap;
 480
 481         void (*dev_ddp_cleanup)(struct cxgbi_device *);
 482         struct cxgbi_ppm* (*cdev2ppm)(struct cxgbi_device *);
 483         int (*csk_ddp_set_map)(struct cxgbi_ppm *, struct cxgbi_sock *,
 484                                struct cxgbi_task_tag_info *);
 485         void (*csk_ddp_clear_map)(struct cxgbi_device *cdev,
 486                                   struct cxgbi_ppm *,
 487                                   struct cxgbi_task_tag_info *);
 488         int (*csk_ddp_setup_digest)(struct cxgbi_sock *,
 489                                 unsigned int, int, int, int);
 490         int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *,
 491                                 unsigned int, int, bool);
 492
 493         void (*csk_release_offload_resources)(struct cxgbi_sock *);
 494         int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *);
 495         u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32);
 496         int (*csk_push_tx_frames)(struct cxgbi_sock *, int);
 497         void (*csk_send_abort_req)(struct cxgbi_sock *);
 498         void (*csk_send_close_req)(struct cxgbi_sock *);
 499         int (*csk_alloc_cpls)(struct cxgbi_sock *);
 500         int (*csk_init_act_open)(struct cxgbi_sock *);
 501
 502         void *dd_data;
 503 };
 504 #define cxgbi_cdev_priv(cdev)   ((cdev)->dd_data)
 505
 506 struct cxgbi_conn {
 507         struct cxgbi_endpoint *cep;
 508         struct iscsi_conn *iconn;
 509         struct cxgbi_hba *chba;
 510         u32 task_idx_bits;
 511         unsigned int ddp_full;
 512         unsigned int ddp_tag_full;
 513 };
 514
 515 struct cxgbi_endpoint {
 516         struct cxgbi_conn *cconn;
 517         struct cxgbi_hba *chba;
 518         struct cxgbi_sock *csk;
 519 };
 520
 521 #define MAX_PDU_FRAGS   ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
 522 struct cxgbi_task_data {
 523         unsigned short nr_frags;
 524         struct page_frag frags[MAX_PDU_FRAGS];
 525         struct sk_buff *skb;
 526         unsigned int dlen;
 527         unsigned int offset;
 528         unsigned int count;
 529         unsigned int sgoffset;
 530         struct cxgbi_task_tag_info ttinfo;
 531 };
 532 #define iscsi_task_cxgbi_data(task) \
 533         ((task)->dd_data + sizeof(struct iscsi_tcp_task))
 534
 535 static inline void *cxgbi_alloc_big_mem(unsigned int size,
 536                                         gfp_t gfp)
 537 {
 538         void *p = kzalloc(size, gfp | __GFP_NOWARN);
 539
 540         if (!p)
 541                 p = vzalloc(size);
 542
 543         return p;
 544 }
 545
 546 static inline void cxgbi_free_big_mem(void *addr)
 547 {
 548         kvfree(addr);
 549 }
 550
 551 static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr)
 552 {
 553         if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET)
 554                 chba->ipv4addr = ipaddr;
 555         else
 556                 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n",
 557                         chba->ndev->name);
 558 }
 559
 560 struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
 561 void cxgbi_device_unregister(struct cxgbi_device *);
 562 void cxgbi_device_unregister_all(unsigned int flag);
 563 struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
 564 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
 565 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *,
 566                                                      int *);
 567 int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int,
 568                         struct scsi_host_template *,
 569                         struct scsi_transport_template *);
 570 void cxgbi_hbas_remove(struct cxgbi_device *);
 571
 572 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
 573                         unsigned int max_conn);
 574 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev);
 575
 576 void cxgbi_conn_tx_open(struct cxgbi_sock *);
 577 void cxgbi_conn_pdu_ready(struct cxgbi_sock *);
 578 int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8);
 579 int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int);
 580 int cxgbi_conn_xmit_pdu(struct iscsi_task *);
 581
 582 void cxgbi_cleanup_task(struct iscsi_task *task);
 583
 584 umode_t cxgbi_attr_is_visible(int param_type, int param);
 585 void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *);
 586 int cxgbi_set_conn_param(struct iscsi_cls_conn *,
 587                         enum iscsi_param, char *, int);
 588 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *);
 589 struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32);
 590 int cxgbi_bind_conn(struct iscsi_cls_session *,
 591                         struct iscsi_cls_conn *, u64, int);
 592 void cxgbi_destroy_session(struct iscsi_cls_session *);
 593 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *,
 594                         u16, u16, u32);
 595 int cxgbi_set_host_param(struct Scsi_Host *,
 596                         enum iscsi_host_param, char *, int);
 597 int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *);
 598 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *,
 599                         struct sockaddr *, int);
 600 int cxgbi_ep_poll(struct iscsi_endpoint *, int);
 601 void cxgbi_ep_disconnect(struct iscsi_endpoint *);
 602
 603 int cxgbi_iscsi_init(struct iscsi_transport *,
 604                         struct scsi_transport_template **);
 605 void cxgbi_iscsi_cleanup(struct iscsi_transport *,
 606                         struct scsi_transport_template **);
 607 void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *);
 608 int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int,
 609                         unsigned int, unsigned int);
 610 int cxgbi_ddp_cleanup(struct cxgbi_device *);
 611 void cxgbi_ddp_page_size_factor(int *);
 612 void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *,
 613                             struct cxgbi_task_tag_info *,
 614                             struct scatterlist **sg_pp, unsigned int *sg_off);
 615 void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *,
 616                          struct cxgbi_tag_format *, unsigned int ppmax,
 617                          unsigned int llimit, unsigned int start,
 618                          unsigned int rsvd_factor);
 619 #endif  /*__LIBCXGBI_H__*/