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 <scsi/scsi_device.h>
  28 #include <scsi/libiscsi_tcp.h>
  29
  30 #include <libcxgb_ppm.h>
  31
  32 enum cxgbi_dbg_flag {
  33         CXGBI_DBG_ISCSI,
  34         CXGBI_DBG_DDP,
  35         CXGBI_DBG_TOE,
  36         CXGBI_DBG_SOCK,
  37
  38         CXGBI_DBG_PDU_TX,
  39         CXGBI_DBG_PDU_RX,
  40         CXGBI_DBG_DEV,
  41 };
  42
  43 #define log_debug(level, fmt, ...)      \
  44         do {    \
  45                 if (dbg_level & (level)) \
  46                         pr_info(fmt, ##__VA_ARGS__); \
  47         } while (0)
  48
  49 #define pr_info_ipaddr(fmt_trail,                                       \
  50                         addr1, addr2, args_trail...)                    \
  51 do {                                                                    \
  52         if (!((1 << CXGBI_DBG_SOCK) & dbg_level))                       \
  53                 break;                                                  \
  54         pr_info("%pISpc - %pISpc, " fmt_trail,                          \
  55                 addr1, addr2, args_trail);                              \
  56 } while (0)
  57
  58 /* max. connections per adapter */
  59 #define CXGBI_MAX_CONN          16384
  60
  61 /* always allocate rooms for AHS */
  62 #define SKB_TX_ISCSI_PDU_HEADER_MAX     \
  63         (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE)
  64
  65 #define ISCSI_PDU_NONPAYLOAD_LEN        312 /* bhs(48) + ahs(256) + digest(8)*/
  66
  67 /*
  68  * align pdu size to multiple of 512 for better performance
  69  */
  70 #define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0)
  71
  72 #define ULP2_MODE_ISCSI         2
  73
  74 #define ULP2_MAX_PKT_SIZE       16224
  75 #define ULP2_MAX_PDU_PAYLOAD    \
  76         (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN)
  77
  78 #define CXGBI_ULP2_MAX_ISO_PAYLOAD      65535
  79
  80 #define CXGBI_MAX_ISO_DATA_IN_SKB       \
  81         min_t(u32, MAX_SKB_FRAGS << PAGE_SHIFT, CXGBI_ULP2_MAX_ISO_PAYLOAD)
  82
  83 #define cxgbi_is_iso_config(csk)        ((csk)->cdev->skb_iso_txhdr)
  84 #define cxgbi_is_iso_disabled(csk)      ((csk)->disable_iso)
  85
  86 /*
  87  * For iscsi connections HW may inserts digest bytes into the pdu. Those digest
  88  * bytes are not sent by the host but are part of the TCP payload and therefore
  89  * consume TCP sequence space.
  90  */
  91 static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 };
  92 static inline unsigned int cxgbi_ulp_extra_len(int submode)
  93 {
  94         return ulp2_extra_len[submode & 3];
  95 }
  96
  97 #define CPL_RX_DDP_STATUS_DDP_SHIFT     16 /* ddp'able */
  98 #define CPL_RX_DDP_STATUS_PAD_SHIFT     19 /* pad error */
  99 #define CPL_RX_DDP_STATUS_HCRC_SHIFT    20 /* hcrc error */
 100 #define CPL_RX_DDP_STATUS_DCRC_SHIFT    21 /* dcrc error */
 101
 102 /*
 103  * sge_opaque_hdr -
 104  * Opaque version of structure the SGE stores at skb->head of TX_DATA packets
 105  * and for which we must reserve space.
 106  */
 107 struct sge_opaque_hdr {
 108         void *dev;
 109         dma_addr_t addr[MAX_SKB_FRAGS + 1];
 110 };
 111
 112 struct cxgbi_sock {
 113         struct cxgbi_device *cdev;
 114
 115         int tid;
 116         int atid;
 117         unsigned long flags;
 118         unsigned int mtu;
 119         unsigned short rss_qid;
 120         unsigned short txq_idx;
 121         unsigned short advmss;
 122         unsigned int tx_chan;
 123         unsigned int rx_chan;
 124         unsigned int mss_idx;
 125         unsigned int smac_idx;
 126         unsigned char port_id;
 127         int wr_max_cred;
 128         int wr_cred;
 129         int wr_una_cred;
 130 #ifdef CONFIG_CHELSIO_T4_DCB
 131         u8 dcb_priority;
 132 #endif
 133         unsigned char hcrc_len;
 134         unsigned char dcrc_len;
 135
 136         void *l2t;
 137         struct sk_buff *wr_pending_head;
 138         struct sk_buff *wr_pending_tail;
 139         struct sk_buff *cpl_close;
 140         struct sk_buff *cpl_abort_req;
 141         struct sk_buff *cpl_abort_rpl;
 142         struct sk_buff *skb_ulp_lhdr;
 143         spinlock_t lock;
 144         struct kref refcnt;
 145         unsigned int state;
 146         unsigned int csk_family;
 147         union {
 148                 struct sockaddr_in saddr;
 149                 struct sockaddr_in6 saddr6;
 150         };
 151         union {
 152                 struct sockaddr_in daddr;
 153                 struct sockaddr_in6 daddr6;
 154         };
 155         struct dst_entry *dst;
 156         struct sk_buff_head receive_queue;
 157         struct sk_buff_head write_queue;
 158         struct timer_list retry_timer;
 159         struct completion cmpl;
 160         int err;
 161         rwlock_t callback_lock;
 162         void *user_data;
 163
 164         u32 rcv_nxt;
 165         u32 copied_seq;
 166         u32 rcv_wup;
 167         u32 snd_nxt;
 168         u32 snd_una;
 169         u32 write_seq;
 170         u32 snd_win;
 171         u32 rcv_win;
 172
 173         bool disable_iso;
 174         u32 no_tx_credits;
 175         unsigned long prev_iso_ts;
 176 };
 177
 178 /*
 179  * connection states
 180  */
 181 enum cxgbi_sock_states{
 182         CTP_CLOSED,
 183         CTP_CONNECTING,
 184         CTP_ACTIVE_OPEN,
 185         CTP_ESTABLISHED,
 186         CTP_ACTIVE_CLOSE,
 187         CTP_PASSIVE_CLOSE,
 188         CTP_CLOSE_WAIT_1,
 189         CTP_CLOSE_WAIT_2,
 190         CTP_ABORTING,
 191 };
 192
 193 /*
 194  * Connection flags -- many to track some close related events.
 195  */
 196 enum cxgbi_sock_flags {
 197         CTPF_ABORT_RPL_RCVD,    /*received one ABORT_RPL_RSS message */
 198         CTPF_ABORT_REQ_RCVD,    /*received one ABORT_REQ_RSS message */
 199         CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */
 200         CTPF_TX_DATA_SENT,      /* already sent a TX_DATA WR */
 201         CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */
 202         CTPF_HAS_ATID,          /* reserved atid */
 203         CTPF_HAS_TID,           /* reserved hw tid */
 204         CTPF_OFFLOAD_DOWN,      /* offload function off */
 205         CTPF_LOGOUT_RSP_RCVD,   /* received logout response */
 206 };
 207
 208 struct cxgbi_skb_rx_cb {
 209         __u32 ddigest;
 210         __u32 pdulen;
 211 };
 212
 213 struct cxgbi_skb_tx_cb {
 214         void *handle;
 215         void *arp_err_handler;
 216         struct sk_buff *wr_next;
 217         u16 iscsi_hdr_len;
 218         u8 ulp_mode;
 219 };
 220
 221 enum cxgbi_skcb_flags {
 222         SKCBF_TX_NEED_HDR,      /* packet needs a header */
 223         SKCBF_TX_MEM_WRITE,     /* memory write */
 224         SKCBF_TX_FLAG_COMPL,    /* wr completion flag */
 225         SKCBF_RX_COALESCED,     /* received whole pdu */
 226         SKCBF_RX_HDR,           /* received pdu header */
 227         SKCBF_RX_DATA,          /* received pdu payload */
 228         SKCBF_RX_STATUS,        /* received ddp status */
 229         SKCBF_RX_ISCSI_COMPL,   /* received iscsi completion */
 230         SKCBF_RX_DATA_DDPD,     /* pdu payload ddp'd */
 231         SKCBF_RX_HCRC_ERR,      /* header digest error */
 232         SKCBF_RX_DCRC_ERR,      /* data digest error */
 233         SKCBF_RX_PAD_ERR,       /* padding byte error */
 234         SKCBF_TX_ISO,           /* iso cpl in tx skb */
 235 };
 236
 237 struct cxgbi_skb_cb {
 238         union {
 239                 struct cxgbi_skb_rx_cb rx;
 240                 struct cxgbi_skb_tx_cb tx;
 241         };
 242         unsigned long flags;
 243         unsigned int seq;
 244 };
 245
 246 #define CXGBI_SKB_CB(skb)       ((struct cxgbi_skb_cb *)&((skb)->cb[0]))
 247 #define cxgbi_skcb_flags(skb)           (CXGBI_SKB_CB(skb)->flags)
 248 #define cxgbi_skcb_tcp_seq(skb)         (CXGBI_SKB_CB(skb)->seq)
 249 #define cxgbi_skcb_rx_ddigest(skb)      (CXGBI_SKB_CB(skb)->rx.ddigest)
 250 #define cxgbi_skcb_rx_pdulen(skb)       (CXGBI_SKB_CB(skb)->rx.pdulen)
 251 #define cxgbi_skcb_tx_wr_next(skb)      (CXGBI_SKB_CB(skb)->tx.wr_next)
 252 #define cxgbi_skcb_tx_iscsi_hdrlen(skb) (CXGBI_SKB_CB(skb)->tx.iscsi_hdr_len)
 253 #define cxgbi_skcb_tx_ulp_mode(skb)     (CXGBI_SKB_CB(skb)->tx.ulp_mode)
 254
 255 static inline void cxgbi_skcb_set_flag(struct sk_buff *skb,
 256                                         enum cxgbi_skcb_flags flag)
 257 {
 258         __set_bit(flag, &(cxgbi_skcb_flags(skb)));
 259 }
 260
 261 static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,
 262                                         enum cxgbi_skcb_flags flag)
 263 {
 264         __clear_bit(flag, &(cxgbi_skcb_flags(skb)));
 265 }
 266
 267 static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb,
 268                                        enum cxgbi_skcb_flags flag)
 269 {
 270         return test_bit(flag, &(cxgbi_skcb_flags(skb)));
 271 }
 272
 273 static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk,
 274                                         enum cxgbi_sock_flags flag)
 275 {
 276         __set_bit(flag, &csk->flags);
 277         log_debug(1 << CXGBI_DBG_SOCK,
 278                 "csk 0x%p,%u,0x%lx, bit %d.\n",
 279                 csk, csk->state, csk->flags, flag);
 280 }
 281
 282 static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk,
 283                                         enum cxgbi_sock_flags flag)
 284 {
 285         __clear_bit(flag, &csk->flags);
 286         log_debug(1 << CXGBI_DBG_SOCK,
 287                 "csk 0x%p,%u,0x%lx, bit %d.\n",
 288                 csk, csk->state, csk->flags, flag);
 289 }
 290
 291 static inline int cxgbi_sock_flag(struct cxgbi_sock *csk,
 292                                 enum cxgbi_sock_flags flag)
 293 {
 294         if (csk == NULL)
 295                 return 0;
 296         return test_bit(flag, &csk->flags);
 297 }
 298
 299 static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state)
 300 {
 301         log_debug(1 << CXGBI_DBG_SOCK,
 302                 "csk 0x%p,%u,0x%lx, state -> %u.\n",
 303                 csk, csk->state, csk->flags, state);
 304         csk->state = state;
 305 }
 306
 307 static inline void cxgbi_sock_free(struct kref *kref)
 308 {
 309         struct cxgbi_sock *csk = container_of(kref,
 310                                                 struct cxgbi_sock,
 311                                                 refcnt);
 312         if (csk) {
 313                 log_debug(1 << CXGBI_DBG_SOCK,
 314                         "free csk 0x%p, state %u, flags 0x%lx\n",
 315                         csk, csk->state, csk->flags);
 316                 kfree(csk);
 317         }
 318 }
 319
 320 static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk)
 321 {
 322         log_debug(1 << CXGBI_DBG_SOCK,
 323                 "%s, put csk 0x%p, ref %u-1.\n",
 324                 fn, csk, kref_read(&csk->refcnt));
 325         kref_put(&csk->refcnt, cxgbi_sock_free);
 326 }
 327 #define cxgbi_sock_put(csk)     __cxgbi_sock_put(__func__, csk)
 328
 329 static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk)
 330 {
 331         log_debug(1 << CXGBI_DBG_SOCK,
 332                 "%s, get csk 0x%p, ref %u+1.\n",
 333                 fn, csk, kref_read(&csk->refcnt));
 334         kref_get(&csk->refcnt);
 335 }
 336 #define cxgbi_sock_get(csk)     __cxgbi_sock_get(__func__, csk)
 337
 338 static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk)
 339 {
 340         return csk->state >= CTP_ACTIVE_CLOSE;
 341 }
 342
 343 static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk)
 344 {
 345         return csk->state == CTP_ESTABLISHED;
 346 }
 347
 348 static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk)
 349 {
 350         struct sk_buff *skb;
 351
 352         while ((skb = __skb_dequeue(&csk->write_queue)))
 353                 __kfree_skb(skb);
 354 }
 355
 356 static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win)
 357 {
 358         unsigned int wscale = 0;
 359
 360         while (wscale < 14 && (65535 << wscale) < win)
 361                 wscale++;
 362         return wscale;
 363 }
 364
 365 static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp)
 366 {
 367         struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp);
 368
 369         if (skb) {
 370                 __skb_put(skb, wrlen);
 371                 memset(skb->head, 0, wrlen + dlen);
 372         } else
 373                 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen);
 374         return skb;
 375 }
 376
 377
 378 /*
 379  * The number of WRs needed for an skb depends on the number of fragments
 380  * in the skb and whether it has any payload in its main body.  This maps the
 381  * length of the gather list represented by an skb into the # of necessary WRs.
 382  * The extra two fragments are for iscsi bhs and payload padding.
 383  */
 384 #define SKB_WR_LIST_SIZE         (MAX_SKB_FRAGS + 2)
 385
 386 static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk)
 387 {
 388         csk->wr_pending_head = csk->wr_pending_tail = NULL;
 389 }
 390
 391 static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk,
 392                                           struct sk_buff *skb)
 393 {
 394         cxgbi_skcb_tx_wr_next(skb) = NULL;
 395         /*
 396          * We want to take an extra reference since both us and the driver
 397          * need to free the packet before it's really freed.
 398          */
 399         skb_get(skb);
 400
 401         if (!csk->wr_pending_head)
 402                 csk->wr_pending_head = skb;
 403         else
 404                 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
 405         csk->wr_pending_tail = skb;
 406 }
 407
 408 static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk)
 409 {
 410         int n = 0;
 411         const struct sk_buff *skb = csk->wr_pending_head;
 412
 413         while (skb) {
 414                 n += skb->csum;
 415                 skb = cxgbi_skcb_tx_wr_next(skb);
 416         }
 417         return n;
 418 }
 419
 420 static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk)
 421 {
 422         return csk->wr_pending_head;
 423 }
 424
 425 static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk)
 426 {
 427         struct sk_buff *skb = csk->wr_pending_head;
 428
 429         if (likely(skb)) {
 430                 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb);
 431                 cxgbi_skcb_tx_wr_next(skb) = NULL;
 432         }
 433         return skb;
 434 }
 435
 436 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *);
 437 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *);
 438 void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *);
 439 void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int);
 440 void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *);
 441 void cxgbi_sock_closed(struct cxgbi_sock *);
 442 void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int);
 443 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *);
 444 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *);
 445 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32);
 446 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int,
 447                                 int);
 448 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int);
 449 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *);
 450
 451 struct cxgbi_hba {
 452         struct net_device *ndev;
 453         struct net_device *vdev;        /* vlan dev */
 454         struct Scsi_Host *shost;
 455         struct cxgbi_device *cdev;
 456         __be32 ipv4addr;
 457         unsigned char port_id;
 458 };
 459
 460 struct cxgbi_ports_map {
 461         unsigned int max_connect;
 462         unsigned int used;
 463         unsigned short sport_base;
 464         spinlock_t lock;
 465         unsigned int next;
 466         struct cxgbi_sock **port_csk;
 467 };
 468
 469 #define CXGBI_FLAG_DEV_T3               0x1
 470 #define CXGBI_FLAG_DEV_T4               0x2
 471 #define CXGBI_FLAG_ADAPTER_RESET        0x4
 472 #define CXGBI_FLAG_IPV4_SET             0x10
 473 #define CXGBI_FLAG_USE_PPOD_OFLDQ       0x40
 474 #define CXGBI_FLAG_DDP_OFF              0x100
 475 #define CXGBI_FLAG_DEV_ISO_OFF          0x400
 476
 477 struct cxgbi_device {
 478         struct list_head list_head;
 479         struct list_head rcu_node;
 480         unsigned int flags;
 481         struct net_device **ports;
 482         void *lldev;
 483         struct cxgbi_hba **hbas;
 484         const unsigned short *mtus;
 485         unsigned char nmtus;
 486         unsigned char nports;
 487         struct pci_dev *pdev;
 488         struct iscsi_transport *itp;
 489         struct module *owner;
 490
 491         unsigned int pfvf;
 492         unsigned int rx_credit_thres;
 493         unsigned int skb_tx_rsvd;
 494         u32 skb_iso_txhdr;
 495         unsigned int skb_rx_extra;      /* for msg coalesced mode */
 496         unsigned int tx_max_size;
 497         unsigned int rx_max_size;
 498         unsigned int rxq_idx_cntr;
 499         struct cxgbi_ports_map pmap;
 500
 501         struct cxgbi_ppm* (*cdev2ppm)(struct cxgbi_device *);
 502         int (*csk_ddp_set_map)(struct cxgbi_ppm *, struct cxgbi_sock *,
 503                                struct cxgbi_task_tag_info *);
 504         void (*csk_ddp_clear_map)(struct cxgbi_device *cdev,
 505                                   struct cxgbi_ppm *,
 506                                   struct cxgbi_task_tag_info *);
 507         int (*csk_ddp_setup_digest)(struct cxgbi_sock *,
 508                                     unsigned int, int, int);
 509         int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *,
 510                                    unsigned int, int);
 511
 512         void (*csk_release_offload_resources)(struct cxgbi_sock *);
 513         u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32);
 514         int (*csk_push_tx_frames)(struct cxgbi_sock *, int);
 515         void (*csk_send_abort_req)(struct cxgbi_sock *);
 516         void (*csk_send_close_req)(struct cxgbi_sock *);
 517         int (*csk_alloc_cpls)(struct cxgbi_sock *);
 518         int (*csk_init_act_open)(struct cxgbi_sock *);
 519
 520         void *dd_data;
 521 };
 522 #define cxgbi_cdev_priv(cdev)   ((cdev)->dd_data)
 523
 524 struct cxgbi_conn {
 525         struct cxgbi_endpoint *cep;
 526         struct iscsi_conn *iconn;
 527         struct cxgbi_hba *chba;
 528         u32 task_idx_bits;
 529         unsigned int ddp_full;
 530         unsigned int ddp_tag_full;
 531 };
 532
 533 struct cxgbi_endpoint {
 534         struct cxgbi_conn *cconn;
 535         struct cxgbi_hba *chba;
 536         struct cxgbi_sock *csk;
 537 };
 538
 539 struct cxgbi_task_data {
 540 #define CXGBI_TASK_SGL_CHECKED  0x1
 541 #define CXGBI_TASK_SGL_COPY     0x2
 542         u8 flags;
 543         unsigned short nr_frags;
 544         struct page_frag frags[MAX_SKB_FRAGS];
 545         struct sk_buff *skb;
 546         unsigned int dlen;
 547         unsigned int offset;
 548         unsigned int count;
 549         unsigned int sgoffset;
 550         u32 total_count;
 551         u32 total_offset;
 552         u32 max_xmit_dlength;
 553         struct cxgbi_task_tag_info ttinfo;
 554 };
 555 #define iscsi_task_cxgbi_data(task) \
 556         ((task)->dd_data + sizeof(struct iscsi_tcp_task))
 557
 558 struct cxgbi_iso_info {
 559 #define CXGBI_ISO_INFO_FSLICE           0x1
 560 #define CXGBI_ISO_INFO_LSLICE           0x2
 561 #define CXGBI_ISO_INFO_IMM_ENABLE       0x4
 562         u8 flags;
 563         u8 op;
 564         u8 ahs;
 565         u8 num_pdu;
 566         u32 mpdu;
 567         u32 burst_size;
 568         u32 len;
 569         u32 segment_offset;
 570         u32 datasn_offset;
 571         u32 buffer_offset;
 572 };
 573
 574 static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr)
 575 {
 576         if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET)
 577                 chba->ipv4addr = ipaddr;
 578         else
 579                 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n",
 580                         chba->ndev->name);
 581 }
 582
 583 struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
 584 void cxgbi_device_unregister(struct cxgbi_device *);
 585 void cxgbi_device_unregister_all(unsigned int flag);
 586 struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
 587 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
 588 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *,
 589                                                      int *);
 590 int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int,
 591                         const struct scsi_host_template *,
 592                         struct scsi_transport_template *);
 593 void cxgbi_hbas_remove(struct cxgbi_device *);
 594
 595 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
 596                         unsigned int max_conn);
 597 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev);
 598
 599 void cxgbi_conn_tx_open(struct cxgbi_sock *);
 600 void cxgbi_conn_pdu_ready(struct cxgbi_sock *);
 601 int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8);
 602 int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int);
 603 int cxgbi_conn_xmit_pdu(struct iscsi_task *);
 604
 605 void cxgbi_cleanup_task(struct iscsi_task *task);
 606
 607 umode_t cxgbi_attr_is_visible(int param_type, int param);
 608 void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *);
 609 int cxgbi_set_conn_param(struct iscsi_cls_conn *,
 610                         enum iscsi_param, char *, int);
 611 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *);
 612 struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32);
 613 int cxgbi_bind_conn(struct iscsi_cls_session *,
 614                         struct iscsi_cls_conn *, u64, int);
 615 void cxgbi_destroy_session(struct iscsi_cls_session *);
 616 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *,
 617                         u16, u16, u32);
 618 int cxgbi_set_host_param(struct Scsi_Host *,
 619                         enum iscsi_host_param, char *, int);
 620 int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *);
 621 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *,
 622                         struct sockaddr *, int);
 623 int cxgbi_ep_poll(struct iscsi_endpoint *, int);
 624 void cxgbi_ep_disconnect(struct iscsi_endpoint *);
 625
 626 int cxgbi_iscsi_init(struct iscsi_transport *,
 627                         struct scsi_transport_template **);
 628 void cxgbi_iscsi_cleanup(struct iscsi_transport *,
 629                         struct scsi_transport_template **);
 630 void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *);
 631 int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int,
 632                         unsigned int, unsigned int);
 633 int cxgbi_ddp_cleanup(struct cxgbi_device *);
 634 void cxgbi_ddp_page_size_factor(int *);
 635 void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *,
 636                             struct cxgbi_task_tag_info *,
 637                             struct scatterlist **sg_pp, unsigned int *sg_off);
 638 int cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *cdev,
 639                         struct cxgbi_tag_format *tformat,
 640                         unsigned int iscsi_size, unsigned int llimit,
 641                         unsigned int start, unsigned int rsvd_factor,
 642                         unsigned int edram_start, unsigned int edram_size);
 643 #endif  /*__LIBCXGBI_H__*/