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