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 30 enum 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 /* max. connections per adapter */ 48 #define CXGBI_MAX_CONN 16384 49 50 /* always allocate rooms for AHS */ 51 #define SKB_TX_ISCSI_PDU_HEADER_MAX \ 52 (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE) 53 54 #define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8)*/ 55 56 /* 57 * align pdu size to multiple of 512 for better performance 58 */ 59 #define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0) 60 61 #define ULP2_MODE_ISCSI 2 62 63 #define ULP2_MAX_PKT_SIZE 16224 64 #define ULP2_MAX_PDU_PAYLOAD \ 65 (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN) 66 67 /* 68 * For iscsi connections HW may inserts digest bytes into the pdu. Those digest 69 * bytes are not sent by the host but are part of the TCP payload and therefore 70 * consume TCP sequence space. 71 */ 72 static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 }; 73 static inline unsigned int cxgbi_ulp_extra_len(int submode) 74 { 75 return ulp2_extra_len[submode & 3]; 76 } 77 78 /* 79 * struct pagepod_hdr, pagepod - pagepod format 80 */ 81 82 #define CPL_RX_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */ 83 #define CPL_RX_DDP_STATUS_PAD_SHIFT 19 /* pad error */ 84 #define CPL_RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */ 85 #define CPL_RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */ 86 87 struct cxgbi_pagepod_hdr { 88 u32 vld_tid; 89 u32 pgsz_tag_clr; 90 u32 max_offset; 91 u32 page_offset; 92 u64 rsvd; 93 }; 94 95 #define PPOD_PAGES_MAX 4 96 struct cxgbi_pagepod { 97 struct cxgbi_pagepod_hdr hdr; 98 u64 addr[PPOD_PAGES_MAX + 1]; 99 }; 100 101 struct cxgbi_tag_format { 102 unsigned char sw_bits; 103 unsigned char rsvd_bits; 104 unsigned char rsvd_shift; 105 unsigned char filler[1]; 106 u32 rsvd_mask; 107 }; 108 109 struct cxgbi_gather_list { 110 unsigned int tag; 111 unsigned int length; 112 unsigned int offset; 113 unsigned int nelem; 114 struct page **pages; 115 dma_addr_t phys_addr[0]; 116 }; 117 118 struct cxgbi_ddp_info { 119 struct kref refcnt; 120 struct cxgbi_device *cdev; 121 struct pci_dev *pdev; 122 unsigned int max_txsz; 123 unsigned int max_rxsz; 124 unsigned int llimit; 125 unsigned int ulimit; 126 unsigned int nppods; 127 unsigned int idx_last; 128 unsigned char idx_bits; 129 unsigned char filler[3]; 130 unsigned int idx_mask; 131 unsigned int rsvd_tag_mask; 132 spinlock_t map_lock; 133 struct cxgbi_gather_list **gl_map; 134 }; 135 136 #define DDP_PGIDX_MAX 4 137 #define DDP_THRESHOLD 2048 138 139 #define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */ 140 141 #define PPOD_SIZE sizeof(struct cxgbi_pagepod) /* 64 */ 142 #define PPOD_SIZE_SHIFT 6 143 144 #define ULPMEM_DSGL_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ 145 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 146 #define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ 147 148 #define PPOD_COLOR_SHIFT 0 149 #define PPOD_COLOR(x) ((x) << PPOD_COLOR_SHIFT) 150 151 #define PPOD_IDX_SHIFT 6 152 #define PPOD_IDX_MAX_SIZE 24 153 154 #define PPOD_TID_SHIFT 0 155 #define PPOD_TID(x) ((x) << PPOD_TID_SHIFT) 156 157 #define PPOD_TAG_SHIFT 6 158 #define PPOD_TAG(x) ((x) << PPOD_TAG_SHIFT) 159 160 #define PPOD_VALID_SHIFT 24 161 #define PPOD_VALID(x) ((x) << PPOD_VALID_SHIFT) 162 #define PPOD_VALID_FLAG PPOD_VALID(1U) 163 164 /* 165 * sge_opaque_hdr - 166 * Opaque version of structure the SGE stores at skb->head of TX_DATA packets 167 * and for which we must reserve space. 168 */ 169 struct sge_opaque_hdr { 170 void *dev; 171 dma_addr_t addr[MAX_SKB_FRAGS + 1]; 172 }; 173 174 struct cxgbi_sock { 175 struct cxgbi_device *cdev; 176 177 int tid; 178 int atid; 179 unsigned long flags; 180 unsigned int mtu; 181 unsigned short rss_qid; 182 unsigned short txq_idx; 183 unsigned short advmss; 184 unsigned int tx_chan; 185 unsigned int rx_chan; 186 unsigned int mss_idx; 187 unsigned int smac_idx; 188 unsigned char port_id; 189 int wr_max_cred; 190 int wr_cred; 191 int wr_una_cred; 192 unsigned char hcrc_len; 193 unsigned char dcrc_len; 194 195 void *l2t; 196 struct sk_buff *wr_pending_head; 197 struct sk_buff *wr_pending_tail; 198 struct sk_buff *cpl_close; 199 struct sk_buff *cpl_abort_req; 200 struct sk_buff *cpl_abort_rpl; 201 struct sk_buff *skb_ulp_lhdr; 202 spinlock_t lock; 203 struct kref refcnt; 204 unsigned int state; 205 struct sockaddr_in saddr; 206 struct sockaddr_in daddr; 207 struct dst_entry *dst; 208 struct sk_buff_head receive_queue; 209 struct sk_buff_head write_queue; 210 struct timer_list retry_timer; 211 int err; 212 rwlock_t callback_lock; 213 void *user_data; 214 215 u32 rcv_nxt; 216 u32 copied_seq; 217 u32 rcv_wup; 218 u32 snd_nxt; 219 u32 snd_una; 220 u32 write_seq; 221 }; 222 223 /* 224 * connection states 225 */ 226 enum cxgbi_sock_states{ 227 CTP_CLOSED, 228 CTP_CONNECTING, 229 CTP_ACTIVE_OPEN, 230 CTP_ESTABLISHED, 231 CTP_ACTIVE_CLOSE, 232 CTP_PASSIVE_CLOSE, 233 CTP_CLOSE_WAIT_1, 234 CTP_CLOSE_WAIT_2, 235 CTP_ABORTING, 236 }; 237 238 /* 239 * Connection flags -- many to track some close related events. 240 */ 241 enum cxgbi_sock_flags { 242 CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */ 243 CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */ 244 CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */ 245 CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */ 246 CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */ 247 CTPF_HAS_ATID, /* reserved atid */ 248 CTPF_HAS_TID, /* reserved hw tid */ 249 CTPF_OFFLOAD_DOWN, /* offload function off */ 250 }; 251 252 struct cxgbi_skb_rx_cb { 253 __u32 ddigest; 254 __u32 pdulen; 255 }; 256 257 struct cxgbi_skb_tx_cb { 258 void *l2t; 259 struct sk_buff *wr_next; 260 }; 261 262 enum cxgbi_skcb_flags { 263 SKCBF_TX_NEED_HDR, /* packet needs a header */ 264 SKCBF_RX_COALESCED, /* received whole pdu */ 265 SKCBF_RX_HDR, /* received pdu header */ 266 SKCBF_RX_DATA, /* received pdu payload */ 267 SKCBF_RX_STATUS, /* received ddp status */ 268 SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */ 269 SKCBF_RX_HCRC_ERR, /* header digest error */ 270 SKCBF_RX_DCRC_ERR, /* data digest error */ 271 SKCBF_RX_PAD_ERR, /* padding byte error */ 272 }; 273 274 struct cxgbi_skb_cb { 275 unsigned char ulp_mode; 276 unsigned long flags; 277 unsigned int seq; 278 union { 279 struct cxgbi_skb_rx_cb rx; 280 struct cxgbi_skb_tx_cb tx; 281 }; 282 }; 283 284 #define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0])) 285 #define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags) 286 #define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode) 287 #define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq) 288 #define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest) 289 #define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen) 290 #define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next) 291 292 static inline void cxgbi_skcb_set_flag(struct sk_buff *skb, 293 enum cxgbi_skcb_flags flag) 294 { 295 __set_bit(flag, &(cxgbi_skcb_flags(skb))); 296 } 297 298 static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb, 299 enum cxgbi_skcb_flags flag) 300 { 301 __clear_bit(flag, &(cxgbi_skcb_flags(skb))); 302 } 303 304 static inline int cxgbi_skcb_test_flag(struct sk_buff *skb, 305 enum cxgbi_skcb_flags flag) 306 { 307 return test_bit(flag, &(cxgbi_skcb_flags(skb))); 308 } 309 310 static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk, 311 enum cxgbi_sock_flags flag) 312 { 313 __set_bit(flag, &csk->flags); 314 log_debug(1 << CXGBI_DBG_SOCK, 315 "csk 0x%p,%u,0x%lx, bit %d.\n", 316 csk, csk->state, csk->flags, flag); 317 } 318 319 static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk, 320 enum cxgbi_sock_flags flag) 321 { 322 __clear_bit(flag, &csk->flags); 323 log_debug(1 << CXGBI_DBG_SOCK, 324 "csk 0x%p,%u,0x%lx, bit %d.\n", 325 csk, csk->state, csk->flags, flag); 326 } 327 328 static inline int cxgbi_sock_flag(struct cxgbi_sock *csk, 329 enum cxgbi_sock_flags flag) 330 { 331 if (csk == NULL) 332 return 0; 333 return test_bit(flag, &csk->flags); 334 } 335 336 static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state) 337 { 338 log_debug(1 << CXGBI_DBG_SOCK, 339 "csk 0x%p,%u,0x%lx, state -> %u.\n", 340 csk, csk->state, csk->flags, state); 341 csk->state = state; 342 } 343 344 static inline void cxgbi_sock_free(struct kref *kref) 345 { 346 struct cxgbi_sock *csk = container_of(kref, 347 struct cxgbi_sock, 348 refcnt); 349 if (csk) { 350 log_debug(1 << CXGBI_DBG_SOCK, 351 "free csk 0x%p, state %u, flags 0x%lx\n", 352 csk, csk->state, csk->flags); 353 kfree(csk); 354 } 355 } 356 357 static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk) 358 { 359 log_debug(1 << CXGBI_DBG_SOCK, 360 "%s, put csk 0x%p, ref %u-1.\n", 361 fn, csk, atomic_read(&csk->refcnt.refcount)); 362 kref_put(&csk->refcnt, cxgbi_sock_free); 363 } 364 #define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk) 365 366 static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk) 367 { 368 log_debug(1 << CXGBI_DBG_SOCK, 369 "%s, get csk 0x%p, ref %u+1.\n", 370 fn, csk, atomic_read(&csk->refcnt.refcount)); 371 kref_get(&csk->refcnt); 372 } 373 #define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk) 374 375 static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk) 376 { 377 return csk->state >= CTP_ACTIVE_CLOSE; 378 } 379 380 static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk) 381 { 382 return csk->state == CTP_ESTABLISHED; 383 } 384 385 static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk) 386 { 387 struct sk_buff *skb; 388 389 while ((skb = __skb_dequeue(&csk->write_queue))) 390 __kfree_skb(skb); 391 } 392 393 static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win) 394 { 395 unsigned int wscale = 0; 396 397 while (wscale < 14 && (65535 << wscale) < win) 398 wscale++; 399 return wscale; 400 } 401 402 static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp) 403 { 404 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp); 405 406 if (skb) { 407 __skb_put(skb, wrlen); 408 memset(skb->head, 0, wrlen + dlen); 409 } else 410 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen); 411 return skb; 412 } 413 414 415 /* 416 * The number of WRs needed for an skb depends on the number of fragments 417 * in the skb and whether it has any payload in its main body. This maps the 418 * length of the gather list represented by an skb into the # of necessary WRs. 419 * The extra two fragments are for iscsi bhs and payload padding. 420 */ 421 #define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) 422 423 static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk) 424 { 425 csk->wr_pending_head = csk->wr_pending_tail = NULL; 426 } 427 428 static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk, 429 struct sk_buff *skb) 430 { 431 cxgbi_skcb_tx_wr_next(skb) = NULL; 432 /* 433 * We want to take an extra reference since both us and the driver 434 * need to free the packet before it's really freed. We know there's 435 * just one user currently so we use atomic_set rather than skb_get 436 * to avoid the atomic op. 437 */ 438 atomic_set(&skb->users, 2); 439 440 if (!csk->wr_pending_head) 441 csk->wr_pending_head = skb; 442 else 443 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb; 444 csk->wr_pending_tail = skb; 445 } 446 447 static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk) 448 { 449 int n = 0; 450 const struct sk_buff *skb = csk->wr_pending_head; 451 452 while (skb) { 453 n += skb->csum; 454 skb = cxgbi_skcb_tx_wr_next(skb); 455 } 456 return n; 457 } 458 459 static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk) 460 { 461 return csk->wr_pending_head; 462 } 463 464 static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk) 465 { 466 struct sk_buff *skb = csk->wr_pending_head; 467 468 if (likely(skb)) { 469 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb); 470 cxgbi_skcb_tx_wr_next(skb) = NULL; 471 } 472 return skb; 473 } 474 475 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *); 476 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *); 477 void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *); 478 void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int); 479 void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *); 480 void cxgbi_sock_closed(struct cxgbi_sock *); 481 void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int); 482 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *); 483 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *); 484 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32); 485 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int, 486 int); 487 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int); 488 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *); 489 490 struct cxgbi_hba { 491 struct net_device *ndev; 492 struct net_device *vdev; /* vlan dev */ 493 struct Scsi_Host *shost; 494 struct cxgbi_device *cdev; 495 __be32 ipv4addr; 496 unsigned char port_id; 497 }; 498 499 struct cxgbi_ports_map { 500 unsigned int max_connect; 501 unsigned int used; 502 unsigned short sport_base; 503 spinlock_t lock; 504 unsigned int next; 505 struct cxgbi_sock **port_csk; 506 }; 507 508 #define CXGBI_FLAG_DEV_T3 0x1 509 #define CXGBI_FLAG_DEV_T4 0x2 510 #define CXGBI_FLAG_ADAPTER_RESET 0x4 511 #define CXGBI_FLAG_IPV4_SET 0x10 512 struct cxgbi_device { 513 struct list_head list_head; 514 unsigned int flags; 515 struct net_device **ports; 516 void *lldev; 517 struct cxgbi_hba **hbas; 518 const unsigned short *mtus; 519 unsigned char nmtus; 520 unsigned char nports; 521 struct pci_dev *pdev; 522 struct dentry *debugfs_root; 523 struct iscsi_transport *itp; 524 525 unsigned int pfvf; 526 unsigned int snd_win; 527 unsigned int rcv_win; 528 unsigned int rx_credit_thres; 529 unsigned int skb_tx_rsvd; 530 unsigned int skb_rx_extra; /* for msg coalesced mode */ 531 unsigned int tx_max_size; 532 unsigned int rx_max_size; 533 struct cxgbi_ports_map pmap; 534 struct cxgbi_tag_format tag_format; 535 struct cxgbi_ddp_info *ddp; 536 537 void (*dev_ddp_cleanup)(struct cxgbi_device *); 538 int (*csk_ddp_set)(struct cxgbi_sock *, struct cxgbi_pagepod_hdr *, 539 unsigned int, unsigned int, 540 struct cxgbi_gather_list *); 541 void (*csk_ddp_clear)(struct cxgbi_hba *, 542 unsigned int, unsigned int, unsigned int); 543 int (*csk_ddp_setup_digest)(struct cxgbi_sock *, 544 unsigned int, int, int, int); 545 int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *, 546 unsigned int, int, bool); 547 548 void (*csk_release_offload_resources)(struct cxgbi_sock *); 549 int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *); 550 u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32); 551 int (*csk_push_tx_frames)(struct cxgbi_sock *, int); 552 void (*csk_send_abort_req)(struct cxgbi_sock *); 553 void (*csk_send_close_req)(struct cxgbi_sock *); 554 int (*csk_alloc_cpls)(struct cxgbi_sock *); 555 int (*csk_init_act_open)(struct cxgbi_sock *); 556 557 void *dd_data; 558 }; 559 #define cxgbi_cdev_priv(cdev) ((cdev)->dd_data) 560 561 struct cxgbi_conn { 562 struct cxgbi_endpoint *cep; 563 struct iscsi_conn *iconn; 564 struct cxgbi_hba *chba; 565 u32 task_idx_bits; 566 }; 567 568 struct cxgbi_endpoint { 569 struct cxgbi_conn *cconn; 570 struct cxgbi_hba *chba; 571 struct cxgbi_sock *csk; 572 }; 573 574 #define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) 575 struct cxgbi_task_data { 576 unsigned short nr_frags; 577 struct page_frag frags[MAX_PDU_FRAGS]; 578 struct sk_buff *skb; 579 unsigned int offset; 580 unsigned int count; 581 unsigned int sgoffset; 582 }; 583 #define iscsi_task_cxgbi_data(task) \ 584 ((task)->dd_data + sizeof(struct iscsi_tcp_task)) 585 586 static inline int cxgbi_is_ddp_tag(struct cxgbi_tag_format *tformat, u32 tag) 587 { 588 return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1))); 589 } 590 591 static inline int cxgbi_sw_tag_usable(struct cxgbi_tag_format *tformat, 592 u32 sw_tag) 593 { 594 sw_tag >>= (32 - tformat->rsvd_bits); 595 return !sw_tag; 596 } 597 598 static inline u32 cxgbi_set_non_ddp_tag(struct cxgbi_tag_format *tformat, 599 u32 sw_tag) 600 { 601 unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; 602 u32 mask = (1 << shift) - 1; 603 604 if (sw_tag && (sw_tag & ~mask)) { 605 u32 v1 = sw_tag & ((1 << shift) - 1); 606 u32 v2 = (sw_tag >> (shift - 1)) << shift; 607 608 return v2 | v1 | 1 << shift; 609 } 610 611 return sw_tag | 1 << shift; 612 } 613 614 static inline u32 cxgbi_ddp_tag_base(struct cxgbi_tag_format *tformat, 615 u32 sw_tag) 616 { 617 u32 mask = (1 << tformat->rsvd_shift) - 1; 618 619 if (sw_tag && (sw_tag & ~mask)) { 620 u32 v1 = sw_tag & mask; 621 u32 v2 = sw_tag >> tformat->rsvd_shift; 622 623 v2 <<= tformat->rsvd_bits + tformat->rsvd_shift; 624 625 return v2 | v1; 626 } 627 628 return sw_tag; 629 } 630 631 static inline u32 cxgbi_tag_rsvd_bits(struct cxgbi_tag_format *tformat, 632 u32 tag) 633 { 634 if (cxgbi_is_ddp_tag(tformat, tag)) 635 return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask; 636 637 return 0; 638 } 639 640 static inline u32 cxgbi_tag_nonrsvd_bits(struct cxgbi_tag_format *tformat, 641 u32 tag) 642 { 643 unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; 644 u32 v1, v2; 645 646 if (cxgbi_is_ddp_tag(tformat, tag)) { 647 v1 = tag & ((1 << tformat->rsvd_shift) - 1); 648 v2 = (tag >> (shift + 1)) << tformat->rsvd_shift; 649 } else { 650 u32 mask = (1 << shift) - 1; 651 tag &= ~(1 << shift); 652 v1 = tag & mask; 653 v2 = (tag >> 1) & ~mask; 654 } 655 return v1 | v2; 656 } 657 658 static inline void *cxgbi_alloc_big_mem(unsigned int size, 659 gfp_t gfp) 660 { 661 void *p = kmalloc(size, gfp); 662 if (!p) 663 p = vmalloc(size); 664 if (p) 665 memset(p, 0, size); 666 return p; 667 } 668 669 static inline void cxgbi_free_big_mem(void *addr) 670 { 671 if (is_vmalloc_addr(addr)) 672 vfree(addr); 673 else 674 kfree(addr); 675 } 676 677 static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr) 678 { 679 if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET) 680 chba->ipv4addr = ipaddr; 681 else 682 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n", 683 chba->ndev->name); 684 } 685 686 static inline __be32 cxgbi_get_iscsi_ipv4(struct cxgbi_hba *chba) 687 { 688 return chba->ipv4addr; 689 } 690 691 struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int); 692 void cxgbi_device_unregister(struct cxgbi_device *); 693 void cxgbi_device_unregister_all(unsigned int flag); 694 struct cxgbi_device *cxgbi_device_find_by_lldev(void *); 695 int cxgbi_hbas_add(struct cxgbi_device *, unsigned int, unsigned int, 696 struct scsi_host_template *, 697 struct scsi_transport_template *); 698 void cxgbi_hbas_remove(struct cxgbi_device *); 699 700 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, 701 unsigned int max_conn); 702 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev); 703 704 void cxgbi_conn_tx_open(struct cxgbi_sock *); 705 void cxgbi_conn_pdu_ready(struct cxgbi_sock *); 706 int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8); 707 int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int); 708 int cxgbi_conn_xmit_pdu(struct iscsi_task *); 709 710 void cxgbi_cleanup_task(struct iscsi_task *task); 711 712 umode_t cxgbi_attr_is_visible(int param_type, int param); 713 void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *); 714 int cxgbi_set_conn_param(struct iscsi_cls_conn *, 715 enum iscsi_param, char *, int); 716 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *); 717 struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32); 718 int cxgbi_bind_conn(struct iscsi_cls_session *, 719 struct iscsi_cls_conn *, u64, int); 720 void cxgbi_destroy_session(struct iscsi_cls_session *); 721 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *, 722 u16, u16, u32); 723 int cxgbi_set_host_param(struct Scsi_Host *, 724 enum iscsi_host_param, char *, int); 725 int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *); 726 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *, 727 struct sockaddr *, int); 728 int cxgbi_ep_poll(struct iscsi_endpoint *, int); 729 void cxgbi_ep_disconnect(struct iscsi_endpoint *); 730 731 int cxgbi_iscsi_init(struct iscsi_transport *, 732 struct scsi_transport_template **); 733 void cxgbi_iscsi_cleanup(struct iscsi_transport *, 734 struct scsi_transport_template **); 735 void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *); 736 int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, 737 unsigned int, unsigned int); 738 int cxgbi_ddp_cleanup(struct cxgbi_device *); 739 void cxgbi_ddp_page_size_factor(int *); 740 void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *); 741 void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *, struct cxgbi_pagepod_hdr *, 742 struct cxgbi_gather_list *, unsigned int); 743 #endif /*__LIBCXGBI_H__*/ 744