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 struct sk_buff **gl_skb; 135 }; 136 137 #define DDP_PGIDX_MAX 4 138 #define DDP_THRESHOLD 2048 139 140 #define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */ 141 142 #define PPOD_SIZE sizeof(struct cxgbi_pagepod) /* 64 */ 143 #define PPOD_SIZE_SHIFT 6 144 145 #define ULPMEM_DSGL_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ 146 #define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */ 147 #define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ 148 149 #define PPOD_COLOR_SHIFT 0 150 #define PPOD_COLOR(x) ((x) << PPOD_COLOR_SHIFT) 151 152 #define PPOD_IDX_SHIFT 6 153 #define PPOD_IDX_MAX_SIZE 24 154 155 #define PPOD_TID_SHIFT 0 156 #define PPOD_TID(x) ((x) << PPOD_TID_SHIFT) 157 158 #define PPOD_TAG_SHIFT 6 159 #define PPOD_TAG(x) ((x) << PPOD_TAG_SHIFT) 160 161 #define PPOD_VALID_SHIFT 24 162 #define PPOD_VALID(x) ((x) << PPOD_VALID_SHIFT) 163 #define PPOD_VALID_FLAG PPOD_VALID(1U) 164 165 /* 166 * sge_opaque_hdr - 167 * Opaque version of structure the SGE stores at skb->head of TX_DATA packets 168 * and for which we must reserve space. 169 */ 170 struct sge_opaque_hdr { 171 void *dev; 172 dma_addr_t addr[MAX_SKB_FRAGS + 1]; 173 }; 174 175 struct cxgbi_sock { 176 struct cxgbi_device *cdev; 177 178 int tid; 179 int atid; 180 unsigned long flags; 181 unsigned int mtu; 182 unsigned short rss_qid; 183 unsigned short txq_idx; 184 unsigned short advmss; 185 unsigned int tx_chan; 186 unsigned int rx_chan; 187 unsigned int mss_idx; 188 unsigned int smac_idx; 189 unsigned char port_id; 190 int wr_max_cred; 191 int wr_cred; 192 int wr_una_cred; 193 unsigned char hcrc_len; 194 unsigned char dcrc_len; 195 196 void *l2t; 197 struct sk_buff *wr_pending_head; 198 struct sk_buff *wr_pending_tail; 199 struct sk_buff *cpl_close; 200 struct sk_buff *cpl_abort_req; 201 struct sk_buff *cpl_abort_rpl; 202 struct sk_buff *skb_ulp_lhdr; 203 spinlock_t lock; 204 struct kref refcnt; 205 unsigned int state; 206 struct sockaddr_in saddr; 207 struct sockaddr_in daddr; 208 struct dst_entry *dst; 209 struct sk_buff_head receive_queue; 210 struct sk_buff_head write_queue; 211 struct timer_list retry_timer; 212 int err; 213 rwlock_t callback_lock; 214 void *user_data; 215 216 u32 rcv_nxt; 217 u32 copied_seq; 218 u32 rcv_wup; 219 u32 snd_nxt; 220 u32 snd_una; 221 u32 write_seq; 222 }; 223 224 /* 225 * connection states 226 */ 227 enum cxgbi_sock_states{ 228 CTP_CLOSED, 229 CTP_CONNECTING, 230 CTP_ACTIVE_OPEN, 231 CTP_ESTABLISHED, 232 CTP_ACTIVE_CLOSE, 233 CTP_PASSIVE_CLOSE, 234 CTP_CLOSE_WAIT_1, 235 CTP_CLOSE_WAIT_2, 236 CTP_ABORTING, 237 }; 238 239 /* 240 * Connection flags -- many to track some close related events. 241 */ 242 enum cxgbi_sock_flags { 243 CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */ 244 CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */ 245 CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */ 246 CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */ 247 CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */ 248 CTPF_HAS_ATID, /* reserved atid */ 249 CTPF_HAS_TID, /* reserved hw tid */ 250 CTPF_OFFLOAD_DOWN, /* offload function off */ 251 }; 252 253 struct cxgbi_skb_rx_cb { 254 __u32 ddigest; 255 __u32 pdulen; 256 }; 257 258 struct cxgbi_skb_tx_cb { 259 void *l2t; 260 struct sk_buff *wr_next; 261 }; 262 263 enum cxgbi_skcb_flags { 264 SKCBF_TX_NEED_HDR, /* packet needs a header */ 265 SKCBF_RX_COALESCED, /* received whole pdu */ 266 SKCBF_RX_HDR, /* recieved pdu header */ 267 SKCBF_RX_DATA, /* recieved pdu payload */ 268 SKCBF_RX_STATUS, /* recieved ddp status */ 269 SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */ 270 SKCBF_RX_HCRC_ERR, /* header digest error */ 271 SKCBF_RX_DCRC_ERR, /* data digest error */ 272 SKCBF_RX_PAD_ERR, /* padding byte error */ 273 }; 274 275 struct cxgbi_skb_cb { 276 unsigned char ulp_mode; 277 unsigned long flags; 278 unsigned int seq; 279 union { 280 struct cxgbi_skb_rx_cb rx; 281 struct cxgbi_skb_tx_cb tx; 282 }; 283 }; 284 285 #define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0])) 286 #define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags) 287 #define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode) 288 #define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq) 289 #define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest) 290 #define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen) 291 #define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next) 292 293 static inline void cxgbi_skcb_set_flag(struct sk_buff *skb, 294 enum cxgbi_skcb_flags flag) 295 { 296 __set_bit(flag, &(cxgbi_skcb_flags(skb))); 297 } 298 299 static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb, 300 enum cxgbi_skcb_flags flag) 301 { 302 __clear_bit(flag, &(cxgbi_skcb_flags(skb))); 303 } 304 305 static inline int cxgbi_skcb_test_flag(struct sk_buff *skb, 306 enum cxgbi_skcb_flags flag) 307 { 308 return test_bit(flag, &(cxgbi_skcb_flags(skb))); 309 } 310 311 static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk, 312 enum cxgbi_sock_flags flag) 313 { 314 __set_bit(flag, &csk->flags); 315 log_debug(1 << CXGBI_DBG_SOCK, 316 "csk 0x%p,%u,0x%lx, bit %d.\n", 317 csk, csk->state, csk->flags, flag); 318 } 319 320 static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk, 321 enum cxgbi_sock_flags flag) 322 { 323 __clear_bit(flag, &csk->flags); 324 log_debug(1 << CXGBI_DBG_SOCK, 325 "csk 0x%p,%u,0x%lx, bit %d.\n", 326 csk, csk->state, csk->flags, flag); 327 } 328 329 static inline int cxgbi_sock_flag(struct cxgbi_sock *csk, 330 enum cxgbi_sock_flags flag) 331 { 332 if (csk == NULL) 333 return 0; 334 return test_bit(flag, &csk->flags); 335 } 336 337 static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state) 338 { 339 log_debug(1 << CXGBI_DBG_SOCK, 340 "csk 0x%p,%u,0x%lx, state -> %u.\n", 341 csk, csk->state, csk->flags, state); 342 csk->state = state; 343 } 344 345 static inline void cxgbi_sock_free(struct kref *kref) 346 { 347 struct cxgbi_sock *csk = container_of(kref, 348 struct cxgbi_sock, 349 refcnt); 350 if (csk) { 351 log_debug(1 << CXGBI_DBG_SOCK, 352 "free csk 0x%p, state %u, flags 0x%lx\n", 353 csk, csk->state, csk->flags); 354 kfree(csk); 355 } 356 } 357 358 static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk) 359 { 360 log_debug(1 << CXGBI_DBG_SOCK, 361 "%s, put csk 0x%p, ref %u-1.\n", 362 fn, csk, atomic_read(&csk->refcnt.refcount)); 363 kref_put(&csk->refcnt, cxgbi_sock_free); 364 } 365 #define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk) 366 367 static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk) 368 { 369 log_debug(1 << CXGBI_DBG_SOCK, 370 "%s, get csk 0x%p, ref %u+1.\n", 371 fn, csk, atomic_read(&csk->refcnt.refcount)); 372 kref_get(&csk->refcnt); 373 } 374 #define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk) 375 376 static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk) 377 { 378 return csk->state >= CTP_ACTIVE_CLOSE; 379 } 380 381 static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk) 382 { 383 return csk->state == CTP_ESTABLISHED; 384 } 385 386 static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk) 387 { 388 struct sk_buff *skb; 389 390 while ((skb = __skb_dequeue(&csk->write_queue))) 391 __kfree_skb(skb); 392 } 393 394 static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win) 395 { 396 unsigned int wscale = 0; 397 398 while (wscale < 14 && (65535 << wscale) < win) 399 wscale++; 400 return wscale; 401 } 402 403 static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp) 404 { 405 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp); 406 407 if (skb) { 408 __skb_put(skb, wrlen); 409 memset(skb->head, 0, wrlen + dlen); 410 } else 411 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen); 412 return skb; 413 } 414 415 416 /* 417 * The number of WRs needed for an skb depends on the number of fragments 418 * in the skb and whether it has any payload in its main body. This maps the 419 * length of the gather list represented by an skb into the # of necessary WRs. 420 * The extra two fragments are for iscsi bhs and payload padding. 421 */ 422 #define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) 423 424 static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk) 425 { 426 csk->wr_pending_head = csk->wr_pending_tail = NULL; 427 } 428 429 static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk, 430 struct sk_buff *skb) 431 { 432 cxgbi_skcb_tx_wr_next(skb) = NULL; 433 /* 434 * We want to take an extra reference since both us and the driver 435 * need to free the packet before it's really freed. We know there's 436 * just one user currently so we use atomic_set rather than skb_get 437 * to avoid the atomic op. 438 */ 439 atomic_set(&skb->users, 2); 440 441 if (!csk->wr_pending_head) 442 csk->wr_pending_head = skb; 443 else 444 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb; 445 csk->wr_pending_tail = skb; 446 } 447 448 static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk) 449 { 450 int n = 0; 451 const struct sk_buff *skb = csk->wr_pending_head; 452 453 while (skb) { 454 n += skb->csum; 455 skb = cxgbi_skcb_tx_wr_next(skb); 456 } 457 return n; 458 } 459 460 static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk) 461 { 462 return csk->wr_pending_head; 463 } 464 465 static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk) 466 { 467 struct sk_buff *skb = csk->wr_pending_head; 468 469 if (likely(skb)) { 470 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb); 471 cxgbi_skcb_tx_wr_next(skb) = NULL; 472 } 473 return skb; 474 } 475 476 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *); 477 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *); 478 void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *); 479 void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int); 480 void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *); 481 void cxgbi_sock_closed(struct cxgbi_sock *); 482 void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int); 483 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *); 484 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *); 485 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32); 486 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int, 487 int); 488 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int); 489 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *); 490 491 struct cxgbi_hba { 492 struct net_device *ndev; 493 struct net_device *vdev; /* vlan dev */ 494 struct Scsi_Host *shost; 495 struct cxgbi_device *cdev; 496 __be32 ipv4addr; 497 unsigned char port_id; 498 }; 499 500 struct cxgbi_ports_map { 501 unsigned int max_connect; 502 unsigned int used; 503 unsigned short sport_base; 504 spinlock_t lock; 505 unsigned int next; 506 struct cxgbi_sock **port_csk; 507 }; 508 509 #define CXGBI_FLAG_DEV_T3 0x1 510 #define CXGBI_FLAG_DEV_T4 0x2 511 #define CXGBI_FLAG_ADAPTER_RESET 0x4 512 #define CXGBI_FLAG_IPV4_SET 0x10 513 struct cxgbi_device { 514 struct list_head list_head; 515 unsigned int flags; 516 struct net_device **ports; 517 void *lldev; 518 struct cxgbi_hba **hbas; 519 const unsigned short *mtus; 520 unsigned char nmtus; 521 unsigned char nports; 522 struct pci_dev *pdev; 523 struct dentry *debugfs_root; 524 struct iscsi_transport *itp; 525 526 unsigned int pfvf; 527 unsigned int snd_win; 528 unsigned int rcv_win; 529 unsigned int rx_credit_thres; 530 unsigned int skb_tx_rsvd; 531 unsigned int skb_rx_extra; /* for msg coalesced mode */ 532 unsigned int tx_max_size; 533 unsigned int rx_max_size; 534 struct cxgbi_ports_map pmap; 535 struct cxgbi_tag_format tag_format; 536 struct cxgbi_ddp_info *ddp; 537 538 void (*dev_ddp_cleanup)(struct cxgbi_device *); 539 void (*csk_ddp_free_gl_skb)(struct cxgbi_ddp_info *, int, int); 540 int (*csk_ddp_alloc_gl_skb)(struct cxgbi_ddp_info *, int, int, gfp_t); 541 int (*csk_ddp_set)(struct cxgbi_sock *, struct cxgbi_pagepod_hdr *, 542 unsigned int, unsigned int, 543 struct cxgbi_gather_list *); 544 void (*csk_ddp_clear)(struct cxgbi_hba *, 545 unsigned int, unsigned int, unsigned int); 546 int (*csk_ddp_setup_digest)(struct cxgbi_sock *, 547 unsigned int, int, int, int); 548 int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *, 549 unsigned int, int, bool); 550 551 void (*csk_release_offload_resources)(struct cxgbi_sock *); 552 int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *); 553 u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32); 554 int (*csk_push_tx_frames)(struct cxgbi_sock *, int); 555 void (*csk_send_abort_req)(struct cxgbi_sock *); 556 void (*csk_send_close_req)(struct cxgbi_sock *); 557 int (*csk_alloc_cpls)(struct cxgbi_sock *); 558 int (*csk_init_act_open)(struct cxgbi_sock *); 559 560 void *dd_data; 561 }; 562 #define cxgbi_cdev_priv(cdev) ((cdev)->dd_data) 563 564 struct cxgbi_conn { 565 struct cxgbi_endpoint *cep; 566 struct iscsi_conn *iconn; 567 struct cxgbi_hba *chba; 568 u32 task_idx_bits; 569 }; 570 571 struct cxgbi_endpoint { 572 struct cxgbi_conn *cconn; 573 struct cxgbi_hba *chba; 574 struct cxgbi_sock *csk; 575 }; 576 577 #define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) 578 struct cxgbi_task_data { 579 unsigned short nr_frags; 580 skb_frag_t frags[MAX_PDU_FRAGS]; 581 struct sk_buff *skb; 582 unsigned int offset; 583 unsigned int count; 584 unsigned int sgoffset; 585 }; 586 #define iscsi_task_cxgbi_data(task) \ 587 ((task)->dd_data + sizeof(struct iscsi_tcp_task)) 588 589 static inline int cxgbi_is_ddp_tag(struct cxgbi_tag_format *tformat, u32 tag) 590 { 591 return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1))); 592 } 593 594 static inline int cxgbi_sw_tag_usable(struct cxgbi_tag_format *tformat, 595 u32 sw_tag) 596 { 597 sw_tag >>= (32 - tformat->rsvd_bits); 598 return !sw_tag; 599 } 600 601 static inline u32 cxgbi_set_non_ddp_tag(struct cxgbi_tag_format *tformat, 602 u32 sw_tag) 603 { 604 unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; 605 u32 mask = (1 << shift) - 1; 606 607 if (sw_tag && (sw_tag & ~mask)) { 608 u32 v1 = sw_tag & ((1 << shift) - 1); 609 u32 v2 = (sw_tag >> (shift - 1)) << shift; 610 611 return v2 | v1 | 1 << shift; 612 } 613 614 return sw_tag | 1 << shift; 615 } 616 617 static inline u32 cxgbi_ddp_tag_base(struct cxgbi_tag_format *tformat, 618 u32 sw_tag) 619 { 620 u32 mask = (1 << tformat->rsvd_shift) - 1; 621 622 if (sw_tag && (sw_tag & ~mask)) { 623 u32 v1 = sw_tag & mask; 624 u32 v2 = sw_tag >> tformat->rsvd_shift; 625 626 v2 <<= tformat->rsvd_bits + tformat->rsvd_shift; 627 628 return v2 | v1; 629 } 630 631 return sw_tag; 632 } 633 634 static inline u32 cxgbi_tag_rsvd_bits(struct cxgbi_tag_format *tformat, 635 u32 tag) 636 { 637 if (cxgbi_is_ddp_tag(tformat, tag)) 638 return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask; 639 640 return 0; 641 } 642 643 static inline u32 cxgbi_tag_nonrsvd_bits(struct cxgbi_tag_format *tformat, 644 u32 tag) 645 { 646 unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; 647 u32 v1, v2; 648 649 if (cxgbi_is_ddp_tag(tformat, tag)) { 650 v1 = tag & ((1 << tformat->rsvd_shift) - 1); 651 v2 = (tag >> (shift + 1)) << tformat->rsvd_shift; 652 } else { 653 u32 mask = (1 << shift) - 1; 654 tag &= ~(1 << shift); 655 v1 = tag & mask; 656 v2 = (tag >> 1) & ~mask; 657 } 658 return v1 | v2; 659 } 660 661 static inline void *cxgbi_alloc_big_mem(unsigned int size, 662 gfp_t gfp) 663 { 664 void *p = kmalloc(size, gfp); 665 if (!p) 666 p = vmalloc(size); 667 if (p) 668 memset(p, 0, size); 669 return p; 670 } 671 672 static inline void cxgbi_free_big_mem(void *addr) 673 { 674 if (is_vmalloc_addr(addr)) 675 vfree(addr); 676 else 677 kfree(addr); 678 } 679 680 static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr) 681 { 682 if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET) 683 chba->ipv4addr = ipaddr; 684 else 685 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n", 686 chba->ndev->name); 687 } 688 689 static inline __be32 cxgbi_get_iscsi_ipv4(struct cxgbi_hba *chba) 690 { 691 return chba->ipv4addr; 692 } 693 694 struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int); 695 void cxgbi_device_unregister(struct cxgbi_device *); 696 void cxgbi_device_unregister_all(unsigned int flag); 697 struct cxgbi_device *cxgbi_device_find_by_lldev(void *); 698 int cxgbi_hbas_add(struct cxgbi_device *, unsigned int, unsigned int, 699 struct scsi_host_template *, 700 struct scsi_transport_template *); 701 void cxgbi_hbas_remove(struct cxgbi_device *); 702 703 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, 704 unsigned int max_conn); 705 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev); 706 707 void cxgbi_conn_tx_open(struct cxgbi_sock *); 708 void cxgbi_conn_pdu_ready(struct cxgbi_sock *); 709 int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8); 710 int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int); 711 int cxgbi_conn_xmit_pdu(struct iscsi_task *); 712 713 void cxgbi_cleanup_task(struct iscsi_task *task); 714 715 void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *); 716 int cxgbi_set_conn_param(struct iscsi_cls_conn *, 717 enum iscsi_param, char *, int); 718 int cxgbi_get_conn_param(struct iscsi_cls_conn *, enum iscsi_param, char *); 719 struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32); 720 int cxgbi_bind_conn(struct iscsi_cls_session *, 721 struct iscsi_cls_conn *, u64, int); 722 void cxgbi_destroy_session(struct iscsi_cls_session *); 723 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *, 724 u16, u16, u32); 725 int cxgbi_set_host_param(struct Scsi_Host *, 726 enum iscsi_host_param, char *, int); 727 int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *); 728 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *, 729 struct sockaddr *, int); 730 int cxgbi_ep_poll(struct iscsi_endpoint *, int); 731 void cxgbi_ep_disconnect(struct iscsi_endpoint *); 732 733 int cxgbi_iscsi_init(struct iscsi_transport *, 734 struct scsi_transport_template **); 735 void cxgbi_iscsi_cleanup(struct iscsi_transport *, 736 struct scsi_transport_template **); 737 void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *); 738 int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, 739 unsigned int, unsigned int); 740 int cxgbi_ddp_cleanup(struct cxgbi_device *); 741 void cxgbi_ddp_page_size_factor(int *); 742 void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *); 743 void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *, struct cxgbi_pagepod_hdr *, 744 struct cxgbi_gather_list *, unsigned int); 745 #endif /*__LIBCXGBI_H__*/ 746