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 CTPF_LOGOUT_RSP_RCVD, /* received logout response */ 191 }; 192 193 struct cxgbi_skb_rx_cb { 194 __u32 ddigest; 195 __u32 pdulen; 196 }; 197 198 struct cxgbi_skb_tx_cb { 199 void *handle; 200 void *arp_err_handler; 201 struct sk_buff *wr_next; 202 }; 203 204 enum cxgbi_skcb_flags { 205 SKCBF_TX_NEED_HDR, /* packet needs a header */ 206 SKCBF_TX_MEM_WRITE, /* memory write */ 207 SKCBF_TX_FLAG_COMPL, /* wr completion flag */ 208 SKCBF_TX_DONE, /* skb tx done */ 209 SKCBF_RX_COALESCED, /* received whole pdu */ 210 SKCBF_RX_HDR, /* received pdu header */ 211 SKCBF_RX_DATA, /* received pdu payload */ 212 SKCBF_RX_STATUS, /* received ddp status */ 213 SKCBF_RX_ISCSI_COMPL, /* received iscsi completion */ 214 SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */ 215 SKCBF_RX_HCRC_ERR, /* header digest error */ 216 SKCBF_RX_DCRC_ERR, /* data digest error */ 217 SKCBF_RX_PAD_ERR, /* padding byte error */ 218 }; 219 220 struct cxgbi_skb_cb { 221 union { 222 struct cxgbi_skb_rx_cb rx; 223 struct cxgbi_skb_tx_cb tx; 224 }; 225 unsigned char ulp_mode; 226 unsigned long flags; 227 unsigned int seq; 228 }; 229 230 #define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0])) 231 #define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags) 232 #define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode) 233 #define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq) 234 #define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest) 235 #define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen) 236 #define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next) 237 238 static inline void cxgbi_skcb_set_flag(struct sk_buff *skb, 239 enum cxgbi_skcb_flags flag) 240 { 241 __set_bit(flag, &(cxgbi_skcb_flags(skb))); 242 } 243 244 static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb, 245 enum cxgbi_skcb_flags flag) 246 { 247 __clear_bit(flag, &(cxgbi_skcb_flags(skb))); 248 } 249 250 static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb, 251 enum cxgbi_skcb_flags flag) 252 { 253 return test_bit(flag, &(cxgbi_skcb_flags(skb))); 254 } 255 256 static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk, 257 enum cxgbi_sock_flags flag) 258 { 259 __set_bit(flag, &csk->flags); 260 log_debug(1 << CXGBI_DBG_SOCK, 261 "csk 0x%p,%u,0x%lx, bit %d.\n", 262 csk, csk->state, csk->flags, flag); 263 } 264 265 static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk, 266 enum cxgbi_sock_flags flag) 267 { 268 __clear_bit(flag, &csk->flags); 269 log_debug(1 << CXGBI_DBG_SOCK, 270 "csk 0x%p,%u,0x%lx, bit %d.\n", 271 csk, csk->state, csk->flags, flag); 272 } 273 274 static inline int cxgbi_sock_flag(struct cxgbi_sock *csk, 275 enum cxgbi_sock_flags flag) 276 { 277 if (csk == NULL) 278 return 0; 279 return test_bit(flag, &csk->flags); 280 } 281 282 static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state) 283 { 284 log_debug(1 << CXGBI_DBG_SOCK, 285 "csk 0x%p,%u,0x%lx, state -> %u.\n", 286 csk, csk->state, csk->flags, state); 287 csk->state = state; 288 } 289 290 static inline void cxgbi_sock_free(struct kref *kref) 291 { 292 struct cxgbi_sock *csk = container_of(kref, 293 struct cxgbi_sock, 294 refcnt); 295 if (csk) { 296 log_debug(1 << CXGBI_DBG_SOCK, 297 "free csk 0x%p, state %u, flags 0x%lx\n", 298 csk, csk->state, csk->flags); 299 kfree(csk); 300 } 301 } 302 303 static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk) 304 { 305 log_debug(1 << CXGBI_DBG_SOCK, 306 "%s, put csk 0x%p, ref %u-1.\n", 307 fn, csk, kref_read(&csk->refcnt)); 308 kref_put(&csk->refcnt, cxgbi_sock_free); 309 } 310 #define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk) 311 312 static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk) 313 { 314 log_debug(1 << CXGBI_DBG_SOCK, 315 "%s, get csk 0x%p, ref %u+1.\n", 316 fn, csk, kref_read(&csk->refcnt)); 317 kref_get(&csk->refcnt); 318 } 319 #define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk) 320 321 static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk) 322 { 323 return csk->state >= CTP_ACTIVE_CLOSE; 324 } 325 326 static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk) 327 { 328 return csk->state == CTP_ESTABLISHED; 329 } 330 331 static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk) 332 { 333 struct sk_buff *skb; 334 335 while ((skb = __skb_dequeue(&csk->write_queue))) 336 __kfree_skb(skb); 337 } 338 339 static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win) 340 { 341 unsigned int wscale = 0; 342 343 while (wscale < 14 && (65535 << wscale) < win) 344 wscale++; 345 return wscale; 346 } 347 348 static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp) 349 { 350 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp); 351 352 if (skb) { 353 __skb_put(skb, wrlen); 354 memset(skb->head, 0, wrlen + dlen); 355 } else 356 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen); 357 return skb; 358 } 359 360 361 /* 362 * The number of WRs needed for an skb depends on the number of fragments 363 * in the skb and whether it has any payload in its main body. This maps the 364 * length of the gather list represented by an skb into the # of necessary WRs. 365 * The extra two fragments are for iscsi bhs and payload padding. 366 */ 367 #define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) 368 369 static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk) 370 { 371 csk->wr_pending_head = csk->wr_pending_tail = NULL; 372 } 373 374 static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk, 375 struct sk_buff *skb) 376 { 377 cxgbi_skcb_tx_wr_next(skb) = NULL; 378 /* 379 * We want to take an extra reference since both us and the driver 380 * need to free the packet before it's really freed. 381 */ 382 skb_get(skb); 383 384 if (!csk->wr_pending_head) 385 csk->wr_pending_head = skb; 386 else 387 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb; 388 csk->wr_pending_tail = skb; 389 } 390 391 static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk) 392 { 393 int n = 0; 394 const struct sk_buff *skb = csk->wr_pending_head; 395 396 while (skb) { 397 n += skb->csum; 398 skb = cxgbi_skcb_tx_wr_next(skb); 399 } 400 return n; 401 } 402 403 static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk) 404 { 405 return csk->wr_pending_head; 406 } 407 408 static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk) 409 { 410 struct sk_buff *skb = csk->wr_pending_head; 411 412 if (likely(skb)) { 413 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb); 414 cxgbi_skcb_tx_wr_next(skb) = NULL; 415 } 416 return skb; 417 } 418 419 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *); 420 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *); 421 void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *); 422 void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int); 423 void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *); 424 void cxgbi_sock_closed(struct cxgbi_sock *); 425 void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int); 426 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *); 427 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *); 428 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32); 429 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int, 430 int); 431 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int); 432 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *); 433 434 struct cxgbi_hba { 435 struct net_device *ndev; 436 struct net_device *vdev; /* vlan dev */ 437 struct Scsi_Host *shost; 438 struct cxgbi_device *cdev; 439 __be32 ipv4addr; 440 unsigned char port_id; 441 }; 442 443 struct cxgbi_ports_map { 444 unsigned int max_connect; 445 unsigned int used; 446 unsigned short sport_base; 447 spinlock_t lock; 448 unsigned int next; 449 struct cxgbi_sock **port_csk; 450 }; 451 452 #define CXGBI_FLAG_DEV_T3 0x1 453 #define CXGBI_FLAG_DEV_T4 0x2 454 #define CXGBI_FLAG_ADAPTER_RESET 0x4 455 #define CXGBI_FLAG_IPV4_SET 0x10 456 #define CXGBI_FLAG_USE_PPOD_OFLDQ 0x40 457 #define CXGBI_FLAG_DDP_OFF 0x100 458 459 struct cxgbi_device { 460 struct list_head list_head; 461 struct list_head rcu_node; 462 unsigned int flags; 463 struct net_device **ports; 464 void *lldev; 465 struct cxgbi_hba **hbas; 466 const unsigned short *mtus; 467 unsigned char nmtus; 468 unsigned char nports; 469 struct pci_dev *pdev; 470 struct dentry *debugfs_root; 471 struct iscsi_transport *itp; 472 struct module *owner; 473 474 unsigned int pfvf; 475 unsigned int rx_credit_thres; 476 unsigned int skb_tx_rsvd; 477 unsigned int skb_rx_extra; /* for msg coalesced mode */ 478 unsigned int tx_max_size; 479 unsigned int rx_max_size; 480 unsigned int rxq_idx_cntr; 481 struct cxgbi_ports_map pmap; 482 483 void (*dev_ddp_cleanup)(struct cxgbi_device *); 484 struct cxgbi_ppm* (*cdev2ppm)(struct cxgbi_device *); 485 int (*csk_ddp_set_map)(struct cxgbi_ppm *, struct cxgbi_sock *, 486 struct cxgbi_task_tag_info *); 487 void (*csk_ddp_clear_map)(struct cxgbi_device *cdev, 488 struct cxgbi_ppm *, 489 struct cxgbi_task_tag_info *); 490 int (*csk_ddp_setup_digest)(struct cxgbi_sock *, 491 unsigned int, int, int, int); 492 int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *, 493 unsigned int, int, bool); 494 495 void (*csk_release_offload_resources)(struct cxgbi_sock *); 496 int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *); 497 u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32); 498 int (*csk_push_tx_frames)(struct cxgbi_sock *, int); 499 void (*csk_send_abort_req)(struct cxgbi_sock *); 500 void (*csk_send_close_req)(struct cxgbi_sock *); 501 int (*csk_alloc_cpls)(struct cxgbi_sock *); 502 int (*csk_init_act_open)(struct cxgbi_sock *); 503 504 void *dd_data; 505 }; 506 #define cxgbi_cdev_priv(cdev) ((cdev)->dd_data) 507 508 struct cxgbi_conn { 509 struct cxgbi_endpoint *cep; 510 struct iscsi_conn *iconn; 511 struct cxgbi_hba *chba; 512 u32 task_idx_bits; 513 unsigned int ddp_full; 514 unsigned int ddp_tag_full; 515 }; 516 517 struct cxgbi_endpoint { 518 struct cxgbi_conn *cconn; 519 struct cxgbi_hba *chba; 520 struct cxgbi_sock *csk; 521 }; 522 523 #define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) 524 struct cxgbi_task_data { 525 unsigned short nr_frags; 526 struct page_frag frags[MAX_PDU_FRAGS]; 527 struct sk_buff *skb; 528 unsigned int dlen; 529 unsigned int offset; 530 unsigned int count; 531 unsigned int sgoffset; 532 struct cxgbi_task_tag_info ttinfo; 533 }; 534 #define iscsi_task_cxgbi_data(task) \ 535 ((task)->dd_data + sizeof(struct iscsi_tcp_task)) 536 537 static inline void *cxgbi_alloc_big_mem(unsigned int size, 538 gfp_t gfp) 539 { 540 void *p = kzalloc(size, gfp | __GFP_NOWARN); 541 542 if (!p) 543 p = vzalloc(size); 544 545 return p; 546 } 547 548 static inline void cxgbi_free_big_mem(void *addr) 549 { 550 kvfree(addr); 551 } 552 553 static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr) 554 { 555 if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET) 556 chba->ipv4addr = ipaddr; 557 else 558 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n", 559 chba->ndev->name); 560 } 561 562 struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int); 563 void cxgbi_device_unregister(struct cxgbi_device *); 564 void cxgbi_device_unregister_all(unsigned int flag); 565 struct cxgbi_device *cxgbi_device_find_by_lldev(void *); 566 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *); 567 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *, 568 int *); 569 int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int, 570 struct scsi_host_template *, 571 struct scsi_transport_template *); 572 void cxgbi_hbas_remove(struct cxgbi_device *); 573 574 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, 575 unsigned int max_conn); 576 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev); 577 578 void cxgbi_conn_tx_open(struct cxgbi_sock *); 579 void cxgbi_conn_pdu_ready(struct cxgbi_sock *); 580 int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8); 581 int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int); 582 int cxgbi_conn_xmit_pdu(struct iscsi_task *); 583 584 void cxgbi_cleanup_task(struct iscsi_task *task); 585 586 umode_t cxgbi_attr_is_visible(int param_type, int param); 587 void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *); 588 int cxgbi_set_conn_param(struct iscsi_cls_conn *, 589 enum iscsi_param, char *, int); 590 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *); 591 struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32); 592 int cxgbi_bind_conn(struct iscsi_cls_session *, 593 struct iscsi_cls_conn *, u64, int); 594 void cxgbi_destroy_session(struct iscsi_cls_session *); 595 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *, 596 u16, u16, u32); 597 int cxgbi_set_host_param(struct Scsi_Host *, 598 enum iscsi_host_param, char *, int); 599 int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *); 600 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *, 601 struct sockaddr *, int); 602 int cxgbi_ep_poll(struct iscsi_endpoint *, int); 603 void cxgbi_ep_disconnect(struct iscsi_endpoint *); 604 605 int cxgbi_iscsi_init(struct iscsi_transport *, 606 struct scsi_transport_template **); 607 void cxgbi_iscsi_cleanup(struct iscsi_transport *, 608 struct scsi_transport_template **); 609 void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *); 610 int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, 611 unsigned int, unsigned int); 612 int cxgbi_ddp_cleanup(struct cxgbi_device *); 613 void cxgbi_ddp_page_size_factor(int *); 614 void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *, 615 struct cxgbi_task_tag_info *, 616 struct scatterlist **sg_pp, unsigned int *sg_off); 617 void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *, 618 struct cxgbi_tag_format *, unsigned int ppmax, 619 unsigned int llimit, unsigned int start, 620 unsigned int rsvd_factor); 621 #endif /*__LIBCXGBI_H__*/ 622