1/* 2 * libcxgbi.h: Chelsio common library for T3/T4 iSCSI driver. 3 * 4 * Copyright (c) 2010 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 30enum cxgbi_dbg_flag { 31 CXGBI_DBG_ISCSI, 32 CXGBI_DBG_DDP, 33 CXGBI_DBG_TOE, 34 CXGBI_DBG_SOCK, 35 36 CXGBI_DBG_PDU_TX, 37 CXGBI_DBG_PDU_RX, 38 CXGBI_DBG_DEV, 39}; 40 41#define log_debug(level, fmt, ...) \ 42 do { \ 43 if (dbg_level & (level)) \ 44 pr_info(fmt, ##__VA_ARGS__); \ 45 } while (0) 46 47#define pr_info_ipaddr(fmt_trail, \ 48 addr1, addr2, args_trail...) \ 49do { \ 50 if (!((1 << CXGBI_DBG_SOCK) & dbg_level)) \ 51 break; \ 52 pr_info("%pISpc - %pISpc, " fmt_trail, \ 53 addr1, addr2, args_trail); \ 54} while (0) 55 56/* max. connections per adapter */ 57#define CXGBI_MAX_CONN 16384 58 59/* always allocate rooms for AHS */ 60#define SKB_TX_ISCSI_PDU_HEADER_MAX \ 61 (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE) 62 63#define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8)*/ 64 65/* 66 * align pdu size to multiple of 512 for better performance 67 */ 68#define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0) 69 70#define ULP2_MODE_ISCSI 2 71 72#define ULP2_MAX_PKT_SIZE 16224 73#define ULP2_MAX_PDU_PAYLOAD \ 74 (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN) 75 76/* 77 * For iscsi connections HW may inserts digest bytes into the pdu. Those digest 78 * bytes are not sent by the host but are part of the TCP payload and therefore 79 * consume TCP sequence space. 80 */ 81static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 }; 82static inline unsigned int cxgbi_ulp_extra_len(int submode) 83{ 84 return ulp2_extra_len[submode & 3]; 85} 86 87/* 88 * struct pagepod_hdr, pagepod - pagepod format 89 */ 90 91#define CPL_RX_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */ 92#define CPL_RX_DDP_STATUS_PAD_SHIFT 19 /* pad error */ 93#define CPL_RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */ 94#define CPL_RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */ 95 96struct cxgbi_pagepod_hdr { 97 u32 vld_tid; 98 u32 pgsz_tag_clr; 99 u32 max_offset; 100 u32 page_offset; 101 u64 rsvd; 102}; 103 104#define PPOD_PAGES_MAX 4 105struct cxgbi_pagepod { 106 struct cxgbi_pagepod_hdr hdr; 107 u64 addr[PPOD_PAGES_MAX + 1]; 108}; 109 110struct cxgbi_tag_format { 111 unsigned char sw_bits; 112 unsigned char rsvd_bits; 113 unsigned char rsvd_shift; 114 unsigned char filler[1]; 115 u32 rsvd_mask; 116}; 117 118struct cxgbi_gather_list { 119 unsigned int tag; 120 unsigned int length; 121 unsigned int offset; 122 unsigned int nelem; 123 struct page **pages; 124 dma_addr_t phys_addr[0]; 125}; 126 127struct cxgbi_ddp_info { 128 struct kref refcnt; 129 struct cxgbi_device *cdev; 130 struct pci_dev *pdev; 131 unsigned int max_txsz; 132 unsigned int max_rxsz; 133 unsigned int llimit; 134 unsigned int ulimit; 135 unsigned int nppods; 136 unsigned int idx_last; 137 unsigned char idx_bits; 138 unsigned char filler[3]; 139 unsigned int idx_mask; 140 unsigned int rsvd_tag_mask; 141 spinlock_t map_lock; 142 struct cxgbi_gather_list **gl_map; 143}; 144 145#define DDP_PGIDX_MAX 4 146#define DDP_THRESHOLD 2048 147 148#define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */ 149 150#define PPOD_SIZE sizeof(struct cxgbi_pagepod) /* 64 */ 151#define PPOD_SIZE_SHIFT 6 152 153#define ULPMEM_DSGL_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ 154#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 155#define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ 156 157#define PPOD_COLOR_SHIFT 0 158#define PPOD_COLOR(x) ((x) << PPOD_COLOR_SHIFT) 159 160#define PPOD_IDX_SHIFT 6 161#define PPOD_IDX_MAX_SIZE 24 162 163#define PPOD_TID_SHIFT 0 164#define PPOD_TID(x) ((x) << PPOD_TID_SHIFT) 165 166#define PPOD_TAG_SHIFT 6 167#define PPOD_TAG(x) ((x) << PPOD_TAG_SHIFT) 168 169#define PPOD_VALID_SHIFT 24 170#define PPOD_VALID(x) ((x) << PPOD_VALID_SHIFT) 171#define PPOD_VALID_FLAG PPOD_VALID(1U) 172 173/* 174 * sge_opaque_hdr - 175 * Opaque version of structure the SGE stores at skb->head of TX_DATA packets 176 * and for which we must reserve space. 177 */ 178struct sge_opaque_hdr { 179 void *dev; 180 dma_addr_t addr[MAX_SKB_FRAGS + 1]; 181}; 182 183struct cxgbi_sock { 184 struct cxgbi_device *cdev; 185 186 int tid; 187 int atid; 188 unsigned long flags; 189 unsigned int mtu; 190 unsigned short rss_qid; 191 unsigned short txq_idx; 192 unsigned short advmss; 193 unsigned int tx_chan; 194 unsigned int rx_chan; 195 unsigned int mss_idx; 196 unsigned int smac_idx; 197 unsigned char port_id; 198 int wr_max_cred; 199 int wr_cred; 200 int wr_una_cred; 201 unsigned char hcrc_len; 202 unsigned char dcrc_len; 203 204 void *l2t; 205 struct sk_buff *wr_pending_head; 206 struct sk_buff *wr_pending_tail; 207 struct sk_buff *cpl_close; 208 struct sk_buff *cpl_abort_req; 209 struct sk_buff *cpl_abort_rpl; 210 struct sk_buff *skb_ulp_lhdr; 211 spinlock_t lock; 212 struct kref refcnt; 213 unsigned int state; 214 unsigned int csk_family; 215 union { 216 struct sockaddr_in saddr; 217 struct sockaddr_in6 saddr6; 218 }; 219 union { 220 struct sockaddr_in daddr; 221 struct sockaddr_in6 daddr6; 222 }; 223 struct dst_entry *dst; 224 struct sk_buff_head receive_queue; 225 struct sk_buff_head write_queue; 226 struct timer_list retry_timer; 227 int err; 228 rwlock_t callback_lock; 229 void *user_data; 230 231 u32 rcv_nxt; 232 u32 copied_seq; 233 u32 rcv_wup; 234 u32 snd_nxt; 235 u32 snd_una; 236 u32 write_seq; 237}; 238 239/* 240 * connection states 241 */ 242enum cxgbi_sock_states{ 243 CTP_CLOSED, 244 CTP_CONNECTING, 245 CTP_ACTIVE_OPEN, 246 CTP_ESTABLISHED, 247 CTP_ACTIVE_CLOSE, 248 CTP_PASSIVE_CLOSE, 249 CTP_CLOSE_WAIT_1, 250 CTP_CLOSE_WAIT_2, 251 CTP_ABORTING, 252}; 253 254/* 255 * Connection flags -- many to track some close related events. 256 */ 257enum cxgbi_sock_flags { 258 CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */ 259 CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */ 260 CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */ 261 CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */ 262 CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */ 263 CTPF_HAS_ATID, /* reserved atid */ 264 CTPF_HAS_TID, /* reserved hw tid */ 265 CTPF_OFFLOAD_DOWN, /* offload function off */ 266}; 267 268struct cxgbi_skb_rx_cb { 269 __u32 ddigest; 270 __u32 pdulen; 271}; 272 273struct cxgbi_skb_tx_cb { 274 void *l2t; 275 struct sk_buff *wr_next; 276}; 277 278enum cxgbi_skcb_flags { 279 SKCBF_TX_NEED_HDR, /* packet needs a header */ 280 SKCBF_RX_COALESCED, /* received whole pdu */ 281 SKCBF_RX_HDR, /* received pdu header */ 282 SKCBF_RX_DATA, /* received pdu payload */ 283 SKCBF_RX_STATUS, /* received ddp status */ 284 SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */ 285 SKCBF_RX_HCRC_ERR, /* header digest error */ 286 SKCBF_RX_DCRC_ERR, /* data digest error */ 287 SKCBF_RX_PAD_ERR, /* padding byte error */ 288}; 289 290struct cxgbi_skb_cb { 291 unsigned char ulp_mode; 292 unsigned long flags; 293 unsigned int seq; 294 union { 295 struct cxgbi_skb_rx_cb rx; 296 struct cxgbi_skb_tx_cb tx; 297 }; 298}; 299 300#define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0])) 301#define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags) 302#define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode) 303#define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq) 304#define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest) 305#define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen) 306#define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next) 307 308static inline void cxgbi_skcb_set_flag(struct sk_buff *skb, 309 enum cxgbi_skcb_flags flag) 310{ 311 __set_bit(flag, &(cxgbi_skcb_flags(skb))); 312} 313 314static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb, 315 enum cxgbi_skcb_flags flag) 316{ 317 __clear_bit(flag, &(cxgbi_skcb_flags(skb))); 318} 319 320static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb, 321 enum cxgbi_skcb_flags flag) 322{ 323 return test_bit(flag, &(cxgbi_skcb_flags(skb))); 324} 325 326static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk, 327 enum cxgbi_sock_flags flag) 328{ 329 __set_bit(flag, &csk->flags); 330 log_debug(1 << CXGBI_DBG_SOCK, 331 "csk 0x%p,%u,0x%lx, bit %d.\n", 332 csk, csk->state, csk->flags, flag); 333} 334 335static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk, 336 enum cxgbi_sock_flags flag) 337{ 338 __clear_bit(flag, &csk->flags); 339 log_debug(1 << CXGBI_DBG_SOCK, 340 "csk 0x%p,%u,0x%lx, bit %d.\n", 341 csk, csk->state, csk->flags, flag); 342} 343 344static inline int cxgbi_sock_flag(struct cxgbi_sock *csk, 345 enum cxgbi_sock_flags flag) 346{ 347 if (csk == NULL) 348 return 0; 349 return test_bit(flag, &csk->flags); 350} 351 352static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state) 353{ 354 log_debug(1 << CXGBI_DBG_SOCK, 355 "csk 0x%p,%u,0x%lx, state -> %u.\n", 356 csk, csk->state, csk->flags, state); 357 csk->state = state; 358} 359 360static inline void cxgbi_sock_free(struct kref *kref) 361{ 362 struct cxgbi_sock *csk = container_of(kref, 363 struct cxgbi_sock, 364 refcnt); 365 if (csk) { 366 log_debug(1 << CXGBI_DBG_SOCK, 367 "free csk 0x%p, state %u, flags 0x%lx\n", 368 csk, csk->state, csk->flags); 369 kfree(csk); 370 } 371} 372 373static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk) 374{ 375 log_debug(1 << CXGBI_DBG_SOCK, 376 "%s, put csk 0x%p, ref %u-1.\n", 377 fn, csk, atomic_read(&csk->refcnt.refcount)); 378 kref_put(&csk->refcnt, cxgbi_sock_free); 379} 380#define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk) 381 382static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk) 383{ 384 log_debug(1 << CXGBI_DBG_SOCK, 385 "%s, get csk 0x%p, ref %u+1.\n", 386 fn, csk, atomic_read(&csk->refcnt.refcount)); 387 kref_get(&csk->refcnt); 388} 389#define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk) 390 391static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk) 392{ 393 return csk->state >= CTP_ACTIVE_CLOSE; 394} 395 396static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk) 397{ 398 return csk->state == CTP_ESTABLISHED; 399} 400 401static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk) 402{ 403 struct sk_buff *skb; 404 405 while ((skb = __skb_dequeue(&csk->write_queue))) 406 __kfree_skb(skb); 407} 408 409static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win) 410{ 411 unsigned int wscale = 0; 412 413 while (wscale < 14 && (65535 << wscale) < win) 414 wscale++; 415 return wscale; 416} 417 418static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp) 419{ 420 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp); 421 422 if (skb) { 423 __skb_put(skb, wrlen); 424 memset(skb->head, 0, wrlen + dlen); 425 } else 426 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen); 427 return skb; 428} 429 430 431/* 432 * The number of WRs needed for an skb depends on the number of fragments 433 * in the skb and whether it has any payload in its main body. This maps the 434 * length of the gather list represented by an skb into the # of necessary WRs. 435 * The extra two fragments are for iscsi bhs and payload padding. 436 */ 437#define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) 438 439static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk) 440{ 441 csk->wr_pending_head = csk->wr_pending_tail = NULL; 442} 443 444static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk, 445 struct sk_buff *skb) 446{ 447 cxgbi_skcb_tx_wr_next(skb) = NULL; 448 /* 449 * We want to take an extra reference since both us and the driver 450 * need to free the packet before it's really freed. We know there's 451 * just one user currently so we use atomic_set rather than skb_get 452 * to avoid the atomic op. 453 */ 454 atomic_set(&skb->users, 2); 455 456 if (!csk->wr_pending_head) 457 csk->wr_pending_head = skb; 458 else 459 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb; 460 csk->wr_pending_tail = skb; 461} 462 463static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk) 464{ 465 int n = 0; 466 const struct sk_buff *skb = csk->wr_pending_head; 467 468 while (skb) { 469 n += skb->csum; 470 skb = cxgbi_skcb_tx_wr_next(skb); 471 } 472 return n; 473} 474 475static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk) 476{ 477 return csk->wr_pending_head; 478} 479 480static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk) 481{ 482 struct sk_buff *skb = csk->wr_pending_head; 483 484 if (likely(skb)) { 485 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb); 486 cxgbi_skcb_tx_wr_next(skb) = NULL; 487 } 488 return skb; 489} 490 491void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *); 492void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *); 493void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *); 494void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int); 495void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *); 496void cxgbi_sock_closed(struct cxgbi_sock *); 497void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int); 498void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *); 499void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *); 500void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32); 501void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int, 502 int); 503unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int); 504void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *); 505 506struct cxgbi_hba { 507 struct net_device *ndev; 508 struct net_device *vdev; /* vlan dev */ 509 struct Scsi_Host *shost; 510 struct cxgbi_device *cdev; 511 __be32 ipv4addr; 512 unsigned char port_id; 513}; 514 515struct cxgbi_ports_map { 516 unsigned int max_connect; 517 unsigned int used; 518 unsigned short sport_base; 519 spinlock_t lock; 520 unsigned int next; 521 struct cxgbi_sock **port_csk; 522}; 523 524#define CXGBI_FLAG_DEV_T3 0x1 525#define CXGBI_FLAG_DEV_T4 0x2 526#define CXGBI_FLAG_ADAPTER_RESET 0x4 527#define CXGBI_FLAG_IPV4_SET 0x10 528struct cxgbi_device { 529 struct list_head list_head; 530 struct list_head rcu_node; 531 unsigned int flags; 532 struct net_device **ports; 533 void *lldev; 534 struct cxgbi_hba **hbas; 535 const unsigned short *mtus; 536 unsigned char nmtus; 537 unsigned char nports; 538 struct pci_dev *pdev; 539 struct dentry *debugfs_root; 540 struct iscsi_transport *itp; 541 542 unsigned int pfvf; 543 unsigned int snd_win; 544 unsigned int rcv_win; 545 unsigned int rx_credit_thres; 546 unsigned int skb_tx_rsvd; 547 unsigned int skb_rx_extra; /* for msg coalesced mode */ 548 unsigned int tx_max_size; 549 unsigned int rx_max_size; 550 struct cxgbi_ports_map pmap; 551 struct cxgbi_tag_format tag_format; 552 struct cxgbi_ddp_info *ddp; 553 554 void (*dev_ddp_cleanup)(struct cxgbi_device *); 555 int (*csk_ddp_set)(struct cxgbi_sock *, struct cxgbi_pagepod_hdr *, 556 unsigned int, unsigned int, 557 struct cxgbi_gather_list *); 558 void (*csk_ddp_clear)(struct cxgbi_hba *, 559 unsigned int, unsigned int, unsigned int); 560 int (*csk_ddp_setup_digest)(struct cxgbi_sock *, 561 unsigned int, int, int, int); 562 int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *, 563 unsigned int, int, bool); 564 565 void (*csk_release_offload_resources)(struct cxgbi_sock *); 566 int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *); 567 u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32); 568 int (*csk_push_tx_frames)(struct cxgbi_sock *, int); 569 void (*csk_send_abort_req)(struct cxgbi_sock *); 570 void (*csk_send_close_req)(struct cxgbi_sock *); 571 int (*csk_alloc_cpls)(struct cxgbi_sock *); 572 int (*csk_init_act_open)(struct cxgbi_sock *); 573 574 void *dd_data; 575}; 576#define cxgbi_cdev_priv(cdev) ((cdev)->dd_data) 577 578struct cxgbi_conn { 579 struct cxgbi_endpoint *cep; 580 struct iscsi_conn *iconn; 581 struct cxgbi_hba *chba; 582 u32 task_idx_bits; 583}; 584 585struct cxgbi_endpoint { 586 struct cxgbi_conn *cconn; 587 struct cxgbi_hba *chba; 588 struct cxgbi_sock *csk; 589}; 590 591#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) 592struct cxgbi_task_data { 593 unsigned short nr_frags; 594 struct page_frag frags[MAX_PDU_FRAGS]; 595 struct sk_buff *skb; 596 unsigned int offset; 597 unsigned int count; 598 unsigned int sgoffset; 599}; 600#define iscsi_task_cxgbi_data(task) \ 601 ((task)->dd_data + sizeof(struct iscsi_tcp_task)) 602 603static inline int cxgbi_is_ddp_tag(struct cxgbi_tag_format *tformat, u32 tag) 604{ 605 return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1))); 606} 607 608static inline int cxgbi_sw_tag_usable(struct cxgbi_tag_format *tformat, 609 u32 sw_tag) 610{ 611 sw_tag >>= (32 - tformat->rsvd_bits); 612 return !sw_tag; 613} 614 615static inline u32 cxgbi_set_non_ddp_tag(struct cxgbi_tag_format *tformat, 616 u32 sw_tag) 617{ 618 unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; 619 u32 mask = (1 << shift) - 1; 620 621 if (sw_tag && (sw_tag & ~mask)) { 622 u32 v1 = sw_tag & ((1 << shift) - 1); 623 u32 v2 = (sw_tag >> (shift - 1)) << shift; 624 625 return v2 | v1 | 1 << shift; 626 } 627 628 return sw_tag | 1 << shift; 629} 630 631static inline u32 cxgbi_ddp_tag_base(struct cxgbi_tag_format *tformat, 632 u32 sw_tag) 633{ 634 u32 mask = (1 << tformat->rsvd_shift) - 1; 635 636 if (sw_tag && (sw_tag & ~mask)) { 637 u32 v1 = sw_tag & mask; 638 u32 v2 = sw_tag >> tformat->rsvd_shift; 639 640 v2 <<= tformat->rsvd_bits + tformat->rsvd_shift; 641 642 return v2 | v1; 643 } 644 645 return sw_tag; 646} 647 648static inline u32 cxgbi_tag_rsvd_bits(struct cxgbi_tag_format *tformat, 649 u32 tag) 650{ 651 if (cxgbi_is_ddp_tag(tformat, tag)) 652 return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask; 653 654 return 0; 655} 656 657static inline u32 cxgbi_tag_nonrsvd_bits(struct cxgbi_tag_format *tformat, 658 u32 tag) 659{ 660 unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; 661 u32 v1, v2; 662 663 if (cxgbi_is_ddp_tag(tformat, tag)) { 664 v1 = tag & ((1 << tformat->rsvd_shift) - 1); 665 v2 = (tag >> (shift + 1)) << tformat->rsvd_shift; 666 } else { 667 u32 mask = (1 << shift) - 1; 668 tag &= ~(1 << shift); 669 v1 = tag & mask; 670 v2 = (tag >> 1) & ~mask; 671 } 672 return v1 | v2; 673} 674 675static inline void *cxgbi_alloc_big_mem(unsigned int size, 676 gfp_t gfp) 677{ 678 void *p = kzalloc(size, gfp | __GFP_NOWARN); 679 680 if (!p) 681 p = vzalloc(size); 682 683 return p; 684} 685 686static inline void cxgbi_free_big_mem(void *addr) 687{ 688 if (is_vmalloc_addr(addr)) 689 vfree(addr); 690 else 691 kfree(addr); 692} 693 694static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr) 695{ 696 if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET) 697 chba->ipv4addr = ipaddr; 698 else 699 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n", 700 chba->ndev->name); 701} 702 703struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int); 704void cxgbi_device_unregister(struct cxgbi_device *); 705void cxgbi_device_unregister_all(unsigned int flag); 706struct cxgbi_device *cxgbi_device_find_by_lldev(void *); 707struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *); 708struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *, 709 int *); 710int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int, 711 struct scsi_host_template *, 712 struct scsi_transport_template *); 713void cxgbi_hbas_remove(struct cxgbi_device *); 714 715int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, 716 unsigned int max_conn); 717void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev); 718 719void cxgbi_conn_tx_open(struct cxgbi_sock *); 720void cxgbi_conn_pdu_ready(struct cxgbi_sock *); 721int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8); 722int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int); 723int cxgbi_conn_xmit_pdu(struct iscsi_task *); 724 725void cxgbi_cleanup_task(struct iscsi_task *task); 726 727umode_t cxgbi_attr_is_visible(int param_type, int param); 728void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *); 729int cxgbi_set_conn_param(struct iscsi_cls_conn *, 730 enum iscsi_param, char *, int); 731int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *); 732struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32); 733int cxgbi_bind_conn(struct iscsi_cls_session *, 734 struct iscsi_cls_conn *, u64, int); 735void cxgbi_destroy_session(struct iscsi_cls_session *); 736struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *, 737 u16, u16, u32); 738int cxgbi_set_host_param(struct Scsi_Host *, 739 enum iscsi_host_param, char *, int); 740int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *); 741struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *, 742 struct sockaddr *, int); 743int cxgbi_ep_poll(struct iscsi_endpoint *, int); 744void cxgbi_ep_disconnect(struct iscsi_endpoint *); 745 746int cxgbi_iscsi_init(struct iscsi_transport *, 747 struct scsi_transport_template **); 748void cxgbi_iscsi_cleanup(struct iscsi_transport *, 749 struct scsi_transport_template **); 750void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *); 751int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, 752 unsigned int, unsigned int); 753int cxgbi_ddp_cleanup(struct cxgbi_device *); 754void cxgbi_ddp_page_size_factor(int *); 755void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *); 756void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *, struct cxgbi_pagepod_hdr *, 757 struct cxgbi_gather_list *, unsigned int); 758#endif /*__LIBCXGBI_H__*/ 759