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