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__*/ 620