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