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 int cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *cdev, 621 struct cxgbi_tag_format *tformat, 622 unsigned int iscsi_size, unsigned int llimit, 623 unsigned int start, unsigned int rsvd_factor, 624 unsigned int edram_start, unsigned int edram_size); 625 #endif /*__LIBCXGBI_H__*/ 626