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__*/ 618