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 <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 #define pr_info_ipaddr(fmt_trail, \ 48 addr1, addr2, args_trail...) \ 49 do { \ 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 */ 81 static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 }; 82 static 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 96 struct 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 4 105 struct cxgbi_pagepod { 106 struct cxgbi_pagepod_hdr hdr; 107 u64 addr[PPOD_PAGES_MAX + 1]; 108 }; 109 110 struct 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 }; 117 118 struct 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 }; 126 127 struct 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 */ 178 struct sge_opaque_hdr { 179 void *dev; 180 dma_addr_t addr[MAX_SKB_FRAGS + 1]; 181 }; 182 183 struct 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 u32 snd_win; 238 u32 rcv_win; 239 }; 240 241 /* 242 * connection states 243 */ 244 enum cxgbi_sock_states{ 245 CTP_CLOSED, 246 CTP_CONNECTING, 247 CTP_ACTIVE_OPEN, 248 CTP_ESTABLISHED, 249 CTP_ACTIVE_CLOSE, 250 CTP_PASSIVE_CLOSE, 251 CTP_CLOSE_WAIT_1, 252 CTP_CLOSE_WAIT_2, 253 CTP_ABORTING, 254 }; 255 256 /* 257 * Connection flags -- many to track some close related events. 258 */ 259 enum cxgbi_sock_flags { 260 CTPF_ABORT_RPL_RCVD, /*received one ABORT_RPL_RSS message */ 261 CTPF_ABORT_REQ_RCVD, /*received one ABORT_REQ_RSS message */ 262 CTPF_ABORT_RPL_PENDING, /* expecting an abort reply */ 263 CTPF_TX_DATA_SENT, /* already sent a TX_DATA WR */ 264 CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */ 265 CTPF_HAS_ATID, /* reserved atid */ 266 CTPF_HAS_TID, /* reserved hw tid */ 267 CTPF_OFFLOAD_DOWN, /* offload function off */ 268 }; 269 270 struct cxgbi_skb_rx_cb { 271 __u32 ddigest; 272 __u32 pdulen; 273 }; 274 275 struct cxgbi_skb_tx_cb { 276 void *l2t; 277 struct sk_buff *wr_next; 278 }; 279 280 enum cxgbi_skcb_flags { 281 SKCBF_TX_NEED_HDR, /* packet needs a header */ 282 SKCBF_RX_COALESCED, /* received whole pdu */ 283 SKCBF_RX_HDR, /* received pdu header */ 284 SKCBF_RX_DATA, /* received pdu payload */ 285 SKCBF_RX_STATUS, /* received ddp status */ 286 SKCBF_RX_DATA_DDPD, /* pdu payload ddp'd */ 287 SKCBF_RX_HCRC_ERR, /* header digest error */ 288 SKCBF_RX_DCRC_ERR, /* data digest error */ 289 SKCBF_RX_PAD_ERR, /* padding byte error */ 290 }; 291 292 struct cxgbi_skb_cb { 293 unsigned char ulp_mode; 294 unsigned long flags; 295 unsigned int seq; 296 union { 297 struct cxgbi_skb_rx_cb rx; 298 struct cxgbi_skb_tx_cb tx; 299 }; 300 }; 301 302 #define CXGBI_SKB_CB(skb) ((struct cxgbi_skb_cb *)&((skb)->cb[0])) 303 #define cxgbi_skcb_flags(skb) (CXGBI_SKB_CB(skb)->flags) 304 #define cxgbi_skcb_ulp_mode(skb) (CXGBI_SKB_CB(skb)->ulp_mode) 305 #define cxgbi_skcb_tcp_seq(skb) (CXGBI_SKB_CB(skb)->seq) 306 #define cxgbi_skcb_rx_ddigest(skb) (CXGBI_SKB_CB(skb)->rx.ddigest) 307 #define cxgbi_skcb_rx_pdulen(skb) (CXGBI_SKB_CB(skb)->rx.pdulen) 308 #define cxgbi_skcb_tx_wr_next(skb) (CXGBI_SKB_CB(skb)->tx.wr_next) 309 310 static inline void cxgbi_skcb_set_flag(struct sk_buff *skb, 311 enum cxgbi_skcb_flags flag) 312 { 313 __set_bit(flag, &(cxgbi_skcb_flags(skb))); 314 } 315 316 static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb, 317 enum cxgbi_skcb_flags flag) 318 { 319 __clear_bit(flag, &(cxgbi_skcb_flags(skb))); 320 } 321 322 static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb, 323 enum cxgbi_skcb_flags flag) 324 { 325 return test_bit(flag, &(cxgbi_skcb_flags(skb))); 326 } 327 328 static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk, 329 enum cxgbi_sock_flags flag) 330 { 331 __set_bit(flag, &csk->flags); 332 log_debug(1 << CXGBI_DBG_SOCK, 333 "csk 0x%p,%u,0x%lx, bit %d.\n", 334 csk, csk->state, csk->flags, flag); 335 } 336 337 static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk, 338 enum cxgbi_sock_flags flag) 339 { 340 __clear_bit(flag, &csk->flags); 341 log_debug(1 << CXGBI_DBG_SOCK, 342 "csk 0x%p,%u,0x%lx, bit %d.\n", 343 csk, csk->state, csk->flags, flag); 344 } 345 346 static inline int cxgbi_sock_flag(struct cxgbi_sock *csk, 347 enum cxgbi_sock_flags flag) 348 { 349 if (csk == NULL) 350 return 0; 351 return test_bit(flag, &csk->flags); 352 } 353 354 static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state) 355 { 356 log_debug(1 << CXGBI_DBG_SOCK, 357 "csk 0x%p,%u,0x%lx, state -> %u.\n", 358 csk, csk->state, csk->flags, state); 359 csk->state = state; 360 } 361 362 static inline void cxgbi_sock_free(struct kref *kref) 363 { 364 struct cxgbi_sock *csk = container_of(kref, 365 struct cxgbi_sock, 366 refcnt); 367 if (csk) { 368 log_debug(1 << CXGBI_DBG_SOCK, 369 "free csk 0x%p, state %u, flags 0x%lx\n", 370 csk, csk->state, csk->flags); 371 kfree(csk); 372 } 373 } 374 375 static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk) 376 { 377 log_debug(1 << CXGBI_DBG_SOCK, 378 "%s, put csk 0x%p, ref %u-1.\n", 379 fn, csk, atomic_read(&csk->refcnt.refcount)); 380 kref_put(&csk->refcnt, cxgbi_sock_free); 381 } 382 #define cxgbi_sock_put(csk) __cxgbi_sock_put(__func__, csk) 383 384 static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk) 385 { 386 log_debug(1 << CXGBI_DBG_SOCK, 387 "%s, get csk 0x%p, ref %u+1.\n", 388 fn, csk, atomic_read(&csk->refcnt.refcount)); 389 kref_get(&csk->refcnt); 390 } 391 #define cxgbi_sock_get(csk) __cxgbi_sock_get(__func__, csk) 392 393 static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk) 394 { 395 return csk->state >= CTP_ACTIVE_CLOSE; 396 } 397 398 static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk) 399 { 400 return csk->state == CTP_ESTABLISHED; 401 } 402 403 static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk) 404 { 405 struct sk_buff *skb; 406 407 while ((skb = __skb_dequeue(&csk->write_queue))) 408 __kfree_skb(skb); 409 } 410 411 static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win) 412 { 413 unsigned int wscale = 0; 414 415 while (wscale < 14 && (65535 << wscale) < win) 416 wscale++; 417 return wscale; 418 } 419 420 static inline struct sk_buff *alloc_wr(int wrlen, int dlen, gfp_t gfp) 421 { 422 struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp); 423 424 if (skb) { 425 __skb_put(skb, wrlen); 426 memset(skb->head, 0, wrlen + dlen); 427 } else 428 pr_info("alloc cpl wr skb %u+%u, OOM.\n", wrlen, dlen); 429 return skb; 430 } 431 432 433 /* 434 * The number of WRs needed for an skb depends on the number of fragments 435 * in the skb and whether it has any payload in its main body. This maps the 436 * length of the gather list represented by an skb into the # of necessary WRs. 437 * The extra two fragments are for iscsi bhs and payload padding. 438 */ 439 #define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) 440 441 static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk) 442 { 443 csk->wr_pending_head = csk->wr_pending_tail = NULL; 444 } 445 446 static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk, 447 struct sk_buff *skb) 448 { 449 cxgbi_skcb_tx_wr_next(skb) = NULL; 450 /* 451 * We want to take an extra reference since both us and the driver 452 * need to free the packet before it's really freed. We know there's 453 * just one user currently so we use atomic_set rather than skb_get 454 * to avoid the atomic op. 455 */ 456 atomic_set(&skb->users, 2); 457 458 if (!csk->wr_pending_head) 459 csk->wr_pending_head = skb; 460 else 461 cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb; 462 csk->wr_pending_tail = skb; 463 } 464 465 static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk) 466 { 467 int n = 0; 468 const struct sk_buff *skb = csk->wr_pending_head; 469 470 while (skb) { 471 n += skb->csum; 472 skb = cxgbi_skcb_tx_wr_next(skb); 473 } 474 return n; 475 } 476 477 static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk) 478 { 479 return csk->wr_pending_head; 480 } 481 482 static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk) 483 { 484 struct sk_buff *skb = csk->wr_pending_head; 485 486 if (likely(skb)) { 487 csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb); 488 cxgbi_skcb_tx_wr_next(skb) = NULL; 489 } 490 return skb; 491 } 492 493 void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *); 494 void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *); 495 void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *); 496 void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int); 497 void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *); 498 void cxgbi_sock_closed(struct cxgbi_sock *); 499 void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int); 500 void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *); 501 void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *); 502 void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32); 503 void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int, 504 int); 505 unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int); 506 void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *); 507 508 struct cxgbi_hba { 509 struct net_device *ndev; 510 struct net_device *vdev; /* vlan dev */ 511 struct Scsi_Host *shost; 512 struct cxgbi_device *cdev; 513 __be32 ipv4addr; 514 unsigned char port_id; 515 }; 516 517 struct cxgbi_ports_map { 518 unsigned int max_connect; 519 unsigned int used; 520 unsigned short sport_base; 521 spinlock_t lock; 522 unsigned int next; 523 struct cxgbi_sock **port_csk; 524 }; 525 526 #define CXGBI_FLAG_DEV_T3 0x1 527 #define CXGBI_FLAG_DEV_T4 0x2 528 #define CXGBI_FLAG_ADAPTER_RESET 0x4 529 #define CXGBI_FLAG_IPV4_SET 0x10 530 struct cxgbi_device { 531 struct list_head list_head; 532 struct list_head rcu_node; 533 unsigned int flags; 534 struct net_device **ports; 535 void *lldev; 536 struct cxgbi_hba **hbas; 537 const unsigned short *mtus; 538 unsigned char nmtus; 539 unsigned char nports; 540 struct pci_dev *pdev; 541 struct dentry *debugfs_root; 542 struct iscsi_transport *itp; 543 544 unsigned int pfvf; 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) 577 578 struct cxgbi_conn { 579 struct cxgbi_endpoint *cep; 580 struct iscsi_conn *iconn; 581 struct cxgbi_hba *chba; 582 u32 task_idx_bits; 583 }; 584 585 struct 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) 592 struct 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)) 602 603 static 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 } 607 608 static 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 } 614 615 static 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 } 630 631 static 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 } 647 648 static 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 } 656 657 static 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 } 674 675 static 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 } 685 686 static inline void cxgbi_free_big_mem(void *addr) 687 { 688 kvfree(addr); 689 } 690 691 static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr) 692 { 693 if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET) 694 chba->ipv4addr = ipaddr; 695 else 696 pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n", 697 chba->ndev->name); 698 } 699 700 struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int); 701 void cxgbi_device_unregister(struct cxgbi_device *); 702 void cxgbi_device_unregister_all(unsigned int flag); 703 struct cxgbi_device *cxgbi_device_find_by_lldev(void *); 704 struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *); 705 struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *, 706 int *); 707 int cxgbi_hbas_add(struct cxgbi_device *, u64, unsigned int, 708 struct scsi_host_template *, 709 struct scsi_transport_template *); 710 void cxgbi_hbas_remove(struct cxgbi_device *); 711 712 int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, 713 unsigned int max_conn); 714 void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev); 715 716 void cxgbi_conn_tx_open(struct cxgbi_sock *); 717 void cxgbi_conn_pdu_ready(struct cxgbi_sock *); 718 int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8); 719 int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int); 720 int cxgbi_conn_xmit_pdu(struct iscsi_task *); 721 722 void cxgbi_cleanup_task(struct iscsi_task *task); 723 724 umode_t cxgbi_attr_is_visible(int param_type, int param); 725 void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *); 726 int cxgbi_set_conn_param(struct iscsi_cls_conn *, 727 enum iscsi_param, char *, int); 728 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param, char *); 729 struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32); 730 int cxgbi_bind_conn(struct iscsi_cls_session *, 731 struct iscsi_cls_conn *, u64, int); 732 void cxgbi_destroy_session(struct iscsi_cls_session *); 733 struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *, 734 u16, u16, u32); 735 int cxgbi_set_host_param(struct Scsi_Host *, 736 enum iscsi_host_param, char *, int); 737 int cxgbi_get_host_param(struct Scsi_Host *, enum iscsi_host_param, char *); 738 struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *, 739 struct sockaddr *, int); 740 int cxgbi_ep_poll(struct iscsi_endpoint *, int); 741 void cxgbi_ep_disconnect(struct iscsi_endpoint *); 742 743 int cxgbi_iscsi_init(struct iscsi_transport *, 744 struct scsi_transport_template **); 745 void cxgbi_iscsi_cleanup(struct iscsi_transport *, 746 struct scsi_transport_template **); 747 void cxgbi_parse_pdu_itt(struct iscsi_conn *, itt_t, int *, int *); 748 int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, 749 unsigned int, unsigned int); 750 int cxgbi_ddp_cleanup(struct cxgbi_device *); 751 void cxgbi_ddp_page_size_factor(int *); 752 void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *); 753 void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *, struct cxgbi_pagepod_hdr *, 754 struct cxgbi_gather_list *, unsigned int); 755 #endif /*__LIBCXGBI_H__*/ 756