1 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */ 2 3 /* Authors: Bernard Metzler <bmt@zurich.ibm.com> */ 4 /* Copyright (c) 2008-2019, IBM Corporation */ 5 6 #ifndef _SIW_H 7 #define _SIW_H 8 9 #include <rdma/ib_verbs.h> 10 #include <linux/socket.h> 11 #include <linux/skbuff.h> 12 #include <crypto/hash.h> 13 #include <linux/crc32.h> 14 #include <linux/crc32c.h> 15 16 #include <rdma/siw-abi.h> 17 #include "iwarp.h" 18 19 #define SIW_VENDOR_ID 0x626d74 /* ascii 'bmt' for now */ 20 #define SIW_VENDORT_PART_ID 0 21 #define SIW_MAX_QP (1024 * 100) 22 #define SIW_MAX_QP_WR (1024 * 32) 23 #define SIW_MAX_ORD_QP 128 24 #define SIW_MAX_IRD_QP 128 25 #define SIW_MAX_SGE_PBL 256 /* max num sge's for PBL */ 26 #define SIW_MAX_SGE_RD 1 /* iwarp limitation. we could relax */ 27 #define SIW_MAX_CQ (1024 * 100) 28 #define SIW_MAX_CQE (SIW_MAX_QP_WR * 100) 29 #define SIW_MAX_MR (SIW_MAX_QP * 10) 30 #define SIW_MAX_PD SIW_MAX_QP 31 #define SIW_MAX_MW 0 /* to be set if MW's are supported */ 32 #define SIW_MAX_FMR SIW_MAX_MR 33 #define SIW_MAX_SRQ SIW_MAX_QP 34 #define SIW_MAX_SRQ_WR (SIW_MAX_QP_WR * 10) 35 #define SIW_MAX_CONTEXT SIW_MAX_PD 36 37 /* Min number of bytes for using zero copy transmit */ 38 #define SENDPAGE_THRESH PAGE_SIZE 39 40 /* Maximum number of frames which can be send in one SQ processing */ 41 #define SQ_USER_MAXBURST 100 42 43 /* Maximum number of consecutive IRQ elements which get served 44 * if SQ has pending work. Prevents starving local SQ processing 45 * by serving peer Read Requests. 46 */ 47 #define SIW_IRQ_MAXBURST_SQ_ACTIVE 4 48 49 struct siw_dev_cap { 50 int max_qp; 51 int max_qp_wr; 52 int max_ord; /* max. outbound read queue depth */ 53 int max_ird; /* max. inbound read queue depth */ 54 int max_sge; 55 int max_sge_rd; 56 int max_cq; 57 int max_cqe; 58 int max_mr; 59 int max_pd; 60 int max_mw; 61 int max_fmr; 62 int max_srq; 63 int max_srq_wr; 64 int max_srq_sge; 65 }; 66 67 struct siw_pd { 68 struct ib_pd base_pd; 69 }; 70 71 struct siw_device { 72 struct ib_device base_dev; 73 struct device_dma_parameters dma_parms; 74 struct net_device *netdev; 75 struct siw_dev_cap attrs; 76 77 u32 vendor_part_id; 78 int numa_node; 79 80 /* physical port state (only one port per device) */ 81 enum ib_port_state state; 82 83 spinlock_t lock; 84 85 struct xarray qp_xa; 86 struct xarray mem_xa; 87 88 struct list_head cep_list; 89 struct list_head qp_list; 90 91 /* active objects statistics to enforce limits */ 92 atomic_t num_qp; 93 atomic_t num_cq; 94 atomic_t num_pd; 95 atomic_t num_mr; 96 atomic_t num_srq; 97 atomic_t num_ctx; 98 99 struct work_struct netdev_down; 100 }; 101 102 struct siw_ucontext { 103 struct ib_ucontext base_ucontext; 104 struct siw_device *sdev; 105 }; 106 107 /* 108 * The RDMA core does not define LOCAL_READ access, which is always 109 * enabled implictely. 110 */ 111 #define IWARP_ACCESS_MASK \ 112 (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | \ 113 IB_ACCESS_REMOTE_READ) 114 115 /* 116 * siw presentation of user memory registered as source 117 * or target of RDMA operations. 118 */ 119 120 struct siw_page_chunk { 121 struct page **plist; 122 }; 123 124 struct siw_umem { 125 struct siw_page_chunk *page_chunk; 126 int num_pages; 127 bool writable; 128 u64 fp_addr; /* First page base address */ 129 struct mm_struct *owning_mm; 130 }; 131 132 struct siw_pble { 133 dma_addr_t addr; /* Address of assigned buffer */ 134 unsigned int size; /* Size of this entry */ 135 unsigned long pbl_off; /* Total offset from start of PBL */ 136 }; 137 138 struct siw_pbl { 139 unsigned int num_buf; 140 unsigned int max_buf; 141 struct siw_pble pbe[1]; 142 }; 143 144 /* 145 * Generic memory representation for registered siw memory. 146 * Memory lookup always via higher 24 bit of STag (STag index). 147 */ 148 struct siw_mem { 149 struct siw_device *sdev; 150 struct kref ref; 151 u64 va; /* VA of memory */ 152 u64 len; /* length of the memory buffer in bytes */ 153 u32 stag; /* iWarp memory access steering tag */ 154 u8 stag_valid; /* VALID or INVALID */ 155 u8 is_pbl; /* PBL or user space mem */ 156 u8 is_mw; /* Memory Region or Memory Window */ 157 enum ib_access_flags perms; /* local/remote READ & WRITE */ 158 union { 159 struct siw_umem *umem; 160 struct siw_pbl *pbl; 161 void *mem_obj; 162 }; 163 struct ib_pd *pd; 164 }; 165 166 struct siw_mr { 167 struct ib_mr base_mr; 168 struct siw_mem *mem; 169 struct rcu_head rcu; 170 }; 171 172 /* 173 * Error codes for local or remote 174 * access to registered memory 175 */ 176 enum siw_access_state { 177 E_ACCESS_OK, 178 E_STAG_INVALID, 179 E_BASE_BOUNDS, 180 E_ACCESS_PERM, 181 E_PD_MISMATCH 182 }; 183 184 enum siw_wr_state { 185 SIW_WR_IDLE, 186 SIW_WR_QUEUED, /* processing has not started yet */ 187 SIW_WR_INPROGRESS /* initiated processing of the WR */ 188 }; 189 190 /* The WQE currently being processed (RX or TX) */ 191 struct siw_wqe { 192 /* Copy of applications SQE or RQE */ 193 union { 194 struct siw_sqe sqe; 195 struct siw_rqe rqe; 196 }; 197 struct siw_mem *mem[SIW_MAX_SGE]; /* per sge's resolved mem */ 198 enum siw_wr_state wr_status; 199 enum siw_wc_status wc_status; 200 u32 bytes; /* total bytes to process */ 201 u32 processed; /* bytes processed */ 202 }; 203 204 struct siw_cq { 205 struct ib_cq base_cq; 206 spinlock_t lock; 207 struct siw_cq_ctrl *notify; 208 struct siw_cqe *queue; 209 u32 cq_put; 210 u32 cq_get; 211 u32 num_cqe; 212 bool kernel_verbs; 213 struct rdma_user_mmap_entry *cq_entry; /* mmap info for CQE array */ 214 u32 id; /* For debugging only */ 215 }; 216 217 enum siw_qp_state { 218 SIW_QP_STATE_IDLE, 219 SIW_QP_STATE_RTR, 220 SIW_QP_STATE_RTS, 221 SIW_QP_STATE_CLOSING, 222 SIW_QP_STATE_TERMINATE, 223 SIW_QP_STATE_ERROR, 224 SIW_QP_STATE_COUNT 225 }; 226 227 enum siw_qp_flags { 228 SIW_RDMA_BIND_ENABLED = (1 << 0), 229 SIW_RDMA_WRITE_ENABLED = (1 << 1), 230 SIW_RDMA_READ_ENABLED = (1 << 2), 231 SIW_SIGNAL_ALL_WR = (1 << 3), 232 SIW_MPA_CRC = (1 << 4), 233 SIW_QP_IN_DESTROY = (1 << 5) 234 }; 235 236 enum siw_qp_attr_mask { 237 SIW_QP_ATTR_STATE = (1 << 0), 238 SIW_QP_ATTR_ACCESS_FLAGS = (1 << 1), 239 SIW_QP_ATTR_LLP_HANDLE = (1 << 2), 240 SIW_QP_ATTR_ORD = (1 << 3), 241 SIW_QP_ATTR_IRD = (1 << 4), 242 SIW_QP_ATTR_SQ_SIZE = (1 << 5), 243 SIW_QP_ATTR_RQ_SIZE = (1 << 6), 244 SIW_QP_ATTR_MPA = (1 << 7) 245 }; 246 247 struct siw_srq { 248 struct ib_srq base_srq; 249 spinlock_t lock; 250 u32 max_sge; 251 u32 limit; /* low watermark for async event */ 252 struct siw_rqe *recvq; 253 u32 rq_put; 254 u32 rq_get; 255 u32 num_rqe; /* max # of wqe's allowed */ 256 struct rdma_user_mmap_entry *srq_entry; /* mmap info for SRQ array */ 257 char armed; /* inform user if limit hit */ 258 char kernel_verbs; /* '1' if kernel client */ 259 }; 260 261 struct siw_qp_attrs { 262 enum siw_qp_state state; 263 u32 sq_size; 264 u32 rq_size; 265 u32 orq_size; 266 u32 irq_size; 267 u32 sq_max_sges; 268 u32 rq_max_sges; 269 enum siw_qp_flags flags; 270 271 struct socket *sk; 272 }; 273 274 enum siw_tx_ctx { 275 SIW_SEND_HDR, /* start or continue sending HDR */ 276 SIW_SEND_DATA, /* start or continue sending DDP payload */ 277 SIW_SEND_TRAILER, /* start or continue sending TRAILER */ 278 SIW_SEND_SHORT_FPDU/* send whole FPDU hdr|data|trailer at once */ 279 }; 280 281 enum siw_rx_state { 282 SIW_GET_HDR, /* await new hdr or within hdr */ 283 SIW_GET_DATA_START, /* start of inbound DDP payload */ 284 SIW_GET_DATA_MORE, /* continuation of (misaligned) DDP payload */ 285 SIW_GET_TRAILER/* await new trailer or within trailer */ 286 }; 287 288 struct siw_rx_stream { 289 struct sk_buff *skb; 290 int skb_new; /* pending unread bytes in skb */ 291 int skb_offset; /* offset in skb */ 292 int skb_copied; /* processed bytes in skb */ 293 294 union iwarp_hdr hdr; 295 struct mpa_trailer trailer; 296 297 enum siw_rx_state state; 298 299 /* 300 * For each FPDU, main RX loop runs through 3 stages: 301 * Receiving protocol headers, placing DDP payload and receiving 302 * trailer information (CRC + possibly padding). 303 * Next two variables keep state on receive status of the 304 * current FPDU part (hdr, data, trailer). 305 */ 306 int fpdu_part_rcvd; /* bytes in pkt part copied */ 307 int fpdu_part_rem; /* bytes in pkt part not seen */ 308 309 /* 310 * Next expected DDP MSN for each QN + 311 * expected steering tag + 312 * expected DDP tagget offset (all HBO) 313 */ 314 u32 ddp_msn[RDMAP_UNTAGGED_QN_COUNT]; 315 u32 ddp_stag; 316 u64 ddp_to; 317 u32 inval_stag; /* Stag to be invalidated */ 318 319 struct shash_desc *mpa_crc_hd; 320 u8 rx_suspend : 1; 321 u8 pad : 2; /* # of pad bytes expected */ 322 u8 rdmap_op : 4; /* opcode of current frame */ 323 }; 324 325 struct siw_rx_fpdu { 326 /* 327 * Local destination memory of inbound RDMA operation. 328 * Valid, according to wqe->wr_status 329 */ 330 struct siw_wqe wqe_active; 331 332 unsigned int pbl_idx; /* Index into current PBL */ 333 unsigned int sge_idx; /* current sge in rx */ 334 unsigned int sge_off; /* already rcvd in curr. sge */ 335 336 char first_ddp_seg; /* this is the first DDP seg */ 337 char more_ddp_segs; /* more DDP segs expected */ 338 u8 prev_rdmap_op : 4; /* opcode of prev frame */ 339 }; 340 341 /* 342 * Shorthands for short packets w/o payload 343 * to be transmitted more efficient. 344 */ 345 struct siw_send_pkt { 346 struct iwarp_send send; 347 __be32 crc; 348 }; 349 350 struct siw_write_pkt { 351 struct iwarp_rdma_write write; 352 __be32 crc; 353 }; 354 355 struct siw_rreq_pkt { 356 struct iwarp_rdma_rreq rreq; 357 __be32 crc; 358 }; 359 360 struct siw_rresp_pkt { 361 struct iwarp_rdma_rresp rresp; 362 __be32 crc; 363 }; 364 365 struct siw_iwarp_tx { 366 union { 367 union iwarp_hdr hdr; 368 369 /* Generic part of FPDU header */ 370 struct iwarp_ctrl ctrl; 371 struct iwarp_ctrl_untagged c_untagged; 372 struct iwarp_ctrl_tagged c_tagged; 373 374 /* FPDU headers */ 375 struct iwarp_rdma_write rwrite; 376 struct iwarp_rdma_rreq rreq; 377 struct iwarp_rdma_rresp rresp; 378 struct iwarp_terminate terminate; 379 struct iwarp_send send; 380 struct iwarp_send_inv send_inv; 381 382 /* complete short FPDUs */ 383 struct siw_send_pkt send_pkt; 384 struct siw_write_pkt write_pkt; 385 struct siw_rreq_pkt rreq_pkt; 386 struct siw_rresp_pkt rresp_pkt; 387 } pkt; 388 389 struct mpa_trailer trailer; 390 /* DDP MSN for untagged messages */ 391 u32 ddp_msn[RDMAP_UNTAGGED_QN_COUNT]; 392 393 enum siw_tx_ctx state; 394 u16 ctrl_len; /* ddp+rdmap hdr */ 395 u16 ctrl_sent; 396 int burst; 397 int bytes_unsent; /* ddp payload bytes */ 398 399 struct shash_desc *mpa_crc_hd; 400 401 u8 do_crc : 1; /* do crc for segment */ 402 u8 use_sendpage : 1; /* send w/o copy */ 403 u8 tx_suspend : 1; /* stop sending DDP segs. */ 404 u8 pad : 2; /* # pad in current fpdu */ 405 u8 orq_fence : 1; /* ORQ full or Send fenced */ 406 u8 in_syscall : 1; /* TX out of user context */ 407 u8 zcopy_tx : 1; /* Use TCP_SENDPAGE if possible */ 408 u8 gso_seg_limit; /* Maximum segments for GSO, 0 = unbound */ 409 410 u16 fpdu_len; /* len of FPDU to tx */ 411 unsigned int tcp_seglen; /* remaining tcp seg space */ 412 413 struct siw_wqe wqe_active; 414 415 int pbl_idx; /* Index into current PBL */ 416 int sge_idx; /* current sge in tx */ 417 u32 sge_off; /* already sent in curr. sge */ 418 }; 419 420 struct siw_qp { 421 struct siw_device *sdev; 422 struct ib_qp *ib_qp; 423 struct kref ref; 424 u32 qp_num; 425 struct list_head devq; 426 int tx_cpu; 427 bool kernel_verbs; 428 struct siw_qp_attrs attrs; 429 430 struct siw_cep *cep; 431 struct rw_semaphore state_lock; 432 433 struct ib_pd *pd; 434 struct siw_cq *scq; 435 struct siw_cq *rcq; 436 struct siw_srq *srq; 437 438 struct siw_iwarp_tx tx_ctx; /* Transmit context */ 439 spinlock_t sq_lock; 440 struct siw_sqe *sendq; /* send queue element array */ 441 uint32_t sq_get; /* consumer index into sq array */ 442 uint32_t sq_put; /* kernel prod. index into sq array */ 443 struct llist_node tx_list; 444 445 struct siw_sqe *orq; /* outbound read queue element array */ 446 spinlock_t orq_lock; 447 uint32_t orq_get; /* consumer index into orq array */ 448 uint32_t orq_put; /* shared producer index for ORQ */ 449 450 struct siw_rx_stream rx_stream; 451 struct siw_rx_fpdu *rx_fpdu; 452 struct siw_rx_fpdu rx_tagged; 453 struct siw_rx_fpdu rx_untagged; 454 spinlock_t rq_lock; 455 struct siw_rqe *recvq; /* recv queue element array */ 456 uint32_t rq_get; /* consumer index into rq array */ 457 uint32_t rq_put; /* kernel prod. index into rq array */ 458 459 struct siw_sqe *irq; /* inbound read queue element array */ 460 uint32_t irq_get; /* consumer index into irq array */ 461 uint32_t irq_put; /* producer index into irq array */ 462 int irq_burst; 463 464 struct { /* information to be carried in TERMINATE pkt, if valid */ 465 u8 valid; 466 u8 in_tx; 467 u8 layer : 4, etype : 4; 468 u8 ecode; 469 } term_info; 470 struct rdma_user_mmap_entry *sq_entry; /* mmap info for SQE array */ 471 struct rdma_user_mmap_entry *rq_entry; /* mmap info for RQE array */ 472 struct rcu_head rcu; 473 }; 474 475 struct siw_base_qp { 476 struct ib_qp base_qp; 477 struct siw_qp *qp; 478 }; 479 480 /* helper macros */ 481 #define rx_qp(rx) container_of(rx, struct siw_qp, rx_stream) 482 #define tx_qp(tx) container_of(tx, struct siw_qp, tx_ctx) 483 #define tx_wqe(qp) (&(qp)->tx_ctx.wqe_active) 484 #define rx_wqe(rctx) (&(rctx)->wqe_active) 485 #define rx_mem(rctx) ((rctx)->wqe_active.mem[0]) 486 #define tx_type(wqe) ((wqe)->sqe.opcode) 487 #define rx_type(wqe) ((wqe)->rqe.opcode) 488 #define tx_flags(wqe) ((wqe)->sqe.flags) 489 490 struct iwarp_msg_info { 491 int hdr_len; 492 struct iwarp_ctrl ctrl; 493 int (*rx_data)(struct siw_qp *qp); 494 }; 495 496 struct siw_user_mmap_entry { 497 struct rdma_user_mmap_entry rdma_entry; 498 void *address; 499 }; 500 501 /* Global siw parameters. Currently set in siw_main.c */ 502 extern const bool zcopy_tx; 503 extern const bool try_gso; 504 extern const bool loopback_enabled; 505 extern const bool mpa_crc_required; 506 extern const bool mpa_crc_strict; 507 extern const bool siw_tcp_nagle; 508 extern u_char mpa_version; 509 extern const bool peer_to_peer; 510 extern struct task_struct *siw_tx_thread[]; 511 512 extern struct crypto_shash *siw_crypto_shash; 513 extern struct iwarp_msg_info iwarp_pktinfo[RDMAP_TERMINATE + 1]; 514 515 /* QP general functions */ 516 int siw_qp_modify(struct siw_qp *qp, struct siw_qp_attrs *attr, 517 enum siw_qp_attr_mask mask); 518 int siw_qp_mpa_rts(struct siw_qp *qp, enum mpa_v2_ctrl ctrl); 519 void siw_qp_llp_close(struct siw_qp *qp); 520 void siw_qp_cm_drop(struct siw_qp *qp, int schedule); 521 void siw_send_terminate(struct siw_qp *qp); 522 523 void siw_qp_get_ref(struct ib_qp *qp); 524 void siw_qp_put_ref(struct ib_qp *qp); 525 int siw_qp_add(struct siw_device *sdev, struct siw_qp *qp); 526 void siw_free_qp(struct kref *ref); 527 528 void siw_init_terminate(struct siw_qp *qp, enum term_elayer layer, 529 u8 etype, u8 ecode, int in_tx); 530 enum ddp_ecode siw_tagged_error(enum siw_access_state state); 531 enum rdmap_ecode siw_rdmap_error(enum siw_access_state state); 532 533 void siw_read_to_orq(struct siw_sqe *rreq, struct siw_sqe *sqe); 534 int siw_sqe_complete(struct siw_qp *qp, struct siw_sqe *sqe, u32 bytes, 535 enum siw_wc_status status); 536 int siw_rqe_complete(struct siw_qp *qp, struct siw_rqe *rqe, u32 bytes, 537 u32 inval_stag, enum siw_wc_status status); 538 void siw_qp_llp_data_ready(struct sock *sk); 539 void siw_qp_llp_write_space(struct sock *sk); 540 541 /* QP TX path functions */ 542 int siw_run_sq(void *arg); 543 int siw_qp_sq_process(struct siw_qp *qp); 544 int siw_sq_start(struct siw_qp *qp); 545 int siw_activate_tx(struct siw_qp *qp); 546 void siw_stop_tx_thread(int nr_cpu); 547 int siw_get_tx_cpu(struct siw_device *sdev); 548 void siw_put_tx_cpu(int cpu); 549 550 /* QP RX path functions */ 551 int siw_proc_send(struct siw_qp *qp); 552 int siw_proc_rreq(struct siw_qp *qp); 553 int siw_proc_rresp(struct siw_qp *qp); 554 int siw_proc_write(struct siw_qp *qp); 555 int siw_proc_terminate(struct siw_qp *qp); 556 557 int siw_tcp_rx_data(read_descriptor_t *rd_desc, struct sk_buff *skb, 558 unsigned int off, size_t len); 559 560 static inline void set_rx_fpdu_context(struct siw_qp *qp, u8 opcode) 561 { 562 if (opcode == RDMAP_RDMA_WRITE || opcode == RDMAP_RDMA_READ_RESP) 563 qp->rx_fpdu = &qp->rx_tagged; 564 else 565 qp->rx_fpdu = &qp->rx_untagged; 566 567 qp->rx_stream.rdmap_op = opcode; 568 } 569 570 static inline struct siw_ucontext *to_siw_ctx(struct ib_ucontext *base_ctx) 571 { 572 return container_of(base_ctx, struct siw_ucontext, base_ucontext); 573 } 574 575 static inline struct siw_base_qp *to_siw_base_qp(struct ib_qp *base_qp) 576 { 577 return container_of(base_qp, struct siw_base_qp, base_qp); 578 } 579 580 static inline struct siw_qp *to_siw_qp(struct ib_qp *base_qp) 581 { 582 return to_siw_base_qp(base_qp)->qp; 583 } 584 585 static inline struct siw_cq *to_siw_cq(struct ib_cq *base_cq) 586 { 587 return container_of(base_cq, struct siw_cq, base_cq); 588 } 589 590 static inline struct siw_srq *to_siw_srq(struct ib_srq *base_srq) 591 { 592 return container_of(base_srq, struct siw_srq, base_srq); 593 } 594 595 static inline struct siw_device *to_siw_dev(struct ib_device *base_dev) 596 { 597 return container_of(base_dev, struct siw_device, base_dev); 598 } 599 600 static inline struct siw_mr *to_siw_mr(struct ib_mr *base_mr) 601 { 602 return container_of(base_mr, struct siw_mr, base_mr); 603 } 604 605 static inline struct siw_user_mmap_entry * 606 to_siw_mmap_entry(struct rdma_user_mmap_entry *rdma_mmap) 607 { 608 return container_of(rdma_mmap, struct siw_user_mmap_entry, rdma_entry); 609 } 610 611 static inline struct siw_qp *siw_qp_id2obj(struct siw_device *sdev, int id) 612 { 613 struct siw_qp *qp; 614 615 rcu_read_lock(); 616 qp = xa_load(&sdev->qp_xa, id); 617 if (likely(qp && kref_get_unless_zero(&qp->ref))) { 618 rcu_read_unlock(); 619 return qp; 620 } 621 rcu_read_unlock(); 622 return NULL; 623 } 624 625 static inline u32 qp_id(struct siw_qp *qp) 626 { 627 return qp->qp_num; 628 } 629 630 static inline void siw_qp_get(struct siw_qp *qp) 631 { 632 kref_get(&qp->ref); 633 } 634 635 static inline void siw_qp_put(struct siw_qp *qp) 636 { 637 kref_put(&qp->ref, siw_free_qp); 638 } 639 640 static inline int siw_sq_empty(struct siw_qp *qp) 641 { 642 struct siw_sqe *sqe = &qp->sendq[qp->sq_get % qp->attrs.sq_size]; 643 644 return READ_ONCE(sqe->flags) == 0; 645 } 646 647 static inline struct siw_sqe *sq_get_next(struct siw_qp *qp) 648 { 649 struct siw_sqe *sqe = &qp->sendq[qp->sq_get % qp->attrs.sq_size]; 650 651 if (READ_ONCE(sqe->flags) & SIW_WQE_VALID) 652 return sqe; 653 654 return NULL; 655 } 656 657 static inline struct siw_sqe *orq_get_current(struct siw_qp *qp) 658 { 659 return &qp->orq[qp->orq_get % qp->attrs.orq_size]; 660 } 661 662 static inline struct siw_sqe *orq_get_tail(struct siw_qp *qp) 663 { 664 return &qp->orq[qp->orq_put % qp->attrs.orq_size]; 665 } 666 667 static inline struct siw_sqe *orq_get_free(struct siw_qp *qp) 668 { 669 struct siw_sqe *orq_e = orq_get_tail(qp); 670 671 if (orq_e && READ_ONCE(orq_e->flags) == 0) 672 return orq_e; 673 674 return NULL; 675 } 676 677 static inline int siw_orq_empty(struct siw_qp *qp) 678 { 679 return qp->orq[qp->orq_get % qp->attrs.orq_size].flags == 0 ? 1 : 0; 680 } 681 682 static inline struct siw_sqe *irq_alloc_free(struct siw_qp *qp) 683 { 684 struct siw_sqe *irq_e = &qp->irq[qp->irq_put % qp->attrs.irq_size]; 685 686 if (READ_ONCE(irq_e->flags) == 0) { 687 qp->irq_put++; 688 return irq_e; 689 } 690 return NULL; 691 } 692 693 static inline __wsum siw_csum_update(const void *buff, int len, __wsum sum) 694 { 695 return (__force __wsum)crc32c((__force __u32)sum, buff, len); 696 } 697 698 static inline __wsum siw_csum_combine(__wsum csum, __wsum csum2, int offset, 699 int len) 700 { 701 return (__force __wsum)__crc32c_le_combine((__force __u32)csum, 702 (__force __u32)csum2, len); 703 } 704 705 static inline void siw_crc_skb(struct siw_rx_stream *srx, unsigned int len) 706 { 707 const struct skb_checksum_ops siw_cs_ops = { 708 .update = siw_csum_update, 709 .combine = siw_csum_combine, 710 }; 711 __wsum crc = *(u32 *)shash_desc_ctx(srx->mpa_crc_hd); 712 713 crc = __skb_checksum(srx->skb, srx->skb_offset, len, crc, 714 &siw_cs_ops); 715 *(u32 *)shash_desc_ctx(srx->mpa_crc_hd) = crc; 716 } 717 718 #define siw_dbg(ibdev, fmt, ...) \ 719 ibdev_dbg(ibdev, "%s: " fmt, __func__, ##__VA_ARGS__) 720 721 #define siw_dbg_qp(qp, fmt, ...) \ 722 ibdev_dbg(&qp->sdev->base_dev, "QP[%u] %s: " fmt, qp_id(qp), __func__, \ 723 ##__VA_ARGS__) 724 725 #define siw_dbg_cq(cq, fmt, ...) \ 726 ibdev_dbg(cq->base_cq.device, "CQ[%u] %s: " fmt, cq->id, __func__, \ 727 ##__VA_ARGS__) 728 729 #define siw_dbg_pd(pd, fmt, ...) \ 730 ibdev_dbg(pd->device, "PD[%u] %s: " fmt, pd->res.id, __func__, \ 731 ##__VA_ARGS__) 732 733 #define siw_dbg_mem(mem, fmt, ...) \ 734 ibdev_dbg(&mem->sdev->base_dev, \ 735 "MEM[0x%08x] %s: " fmt, mem->stag, __func__, ##__VA_ARGS__) 736 737 #define siw_dbg_cep(cep, fmt, ...) \ 738 ibdev_dbg(&cep->sdev->base_dev, "CEP[0x%pK] %s: " fmt, \ 739 cep, __func__, ##__VA_ARGS__) 740 741 void siw_cq_flush(struct siw_cq *cq); 742 void siw_sq_flush(struct siw_qp *qp); 743 void siw_rq_flush(struct siw_qp *qp); 744 int siw_reap_cqe(struct siw_cq *cq, struct ib_wc *wc); 745 746 #endif 747