1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
3 * Copyright(c) 2016 - 2020 Intel Corporation.
6 #ifndef DEF_RDMAVT_INCQP_H
7 #define DEF_RDMAVT_INCQP_H
9 #include <rdma/rdma_vt.h>
10 #include <rdma/ib_pack.h>
11 #include <rdma/ib_verbs.h>
12 #include <rdma/rdmavt_cq.h>
13 #include <rdma/rvt-abi.h>
15 * Atomic bit definitions for r_aflags.
17 #define RVT_R_WRID_VALID 0
18 #define RVT_R_REWIND_SGE 1
21 * Bit definitions for r_flags.
23 #define RVT_R_REUSE_SGE 0x01
24 #define RVT_R_RDMAR_SEQ 0x02
25 #define RVT_R_RSP_NAK 0x04
26 #define RVT_R_RSP_SEND 0x08
27 #define RVT_R_COMM_EST 0x10
30 * If a packet's QP[23:16] bits match this value, then it is
31 * a PSM packet and the hardware will expect a KDETH header
34 #define RVT_KDETH_QP_PREFIX 0x80
35 #define RVT_KDETH_QP_SUFFIX 0xffff
36 #define RVT_KDETH_QP_PREFIX_MASK 0x00ff0000
37 #define RVT_KDETH_QP_PREFIX_SHIFT 16
38 #define RVT_KDETH_QP_BASE (u32)(RVT_KDETH_QP_PREFIX << \
39 RVT_KDETH_QP_PREFIX_SHIFT)
40 #define RVT_KDETH_QP_MAX (u32)(RVT_KDETH_QP_BASE + RVT_KDETH_QP_SUFFIX)
43 * If a packet's LNH == BTH and DEST QPN[23:16] in the BTH match this
44 * prefix value, then it is an AIP packet with a DETH containing the entropy
45 * value in byte 4 following the BTH.
47 #define RVT_AIP_QP_PREFIX 0x81
48 #define RVT_AIP_QP_SUFFIX 0xffff
49 #define RVT_AIP_QP_PREFIX_MASK 0x00ff0000
50 #define RVT_AIP_QP_PREFIX_SHIFT 16
51 #define RVT_AIP_QP_BASE (u32)(RVT_AIP_QP_PREFIX << \
52 RVT_AIP_QP_PREFIX_SHIFT)
53 #define RVT_AIP_QPN_MAX BIT(RVT_AIP_QP_PREFIX_SHIFT)
54 #define RVT_AIP_QP_MAX (u32)(RVT_AIP_QP_BASE + RVT_AIP_QPN_MAX - 1)
57 * Bit definitions for s_flags.
59 * RVT_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
60 * RVT_S_BUSY - send tasklet is processing the QP
61 * RVT_S_TIMER - the RC retry timer is active
62 * RVT_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
63 * RVT_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
64 * before processing the next SWQE
65 * RVT_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
66 * before processing the next SWQE
67 * RVT_S_WAIT_RNR - waiting for RNR timeout
68 * RVT_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
69 * RVT_S_WAIT_DMA - waiting for send DMA queue to drain before generating
70 * next send completion entry not via send DMA
71 * RVT_S_WAIT_PIO - waiting for a send buffer to be available
72 * RVT_S_WAIT_TX - waiting for a struct verbs_txreq to be available
73 * RVT_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
74 * RVT_S_WAIT_KMEM - waiting for kernel memory to be available
75 * RVT_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
76 * RVT_S_WAIT_ACK - waiting for an ACK packet before sending more requests
77 * RVT_S_SEND_ONE - send one packet, request ACK, then wait for ACK
78 * RVT_S_ECN - a BECN was queued to the send engine
79 * RVT_S_MAX_BIT_MASK - The max bit that can be used by rdmavt
81 #define RVT_S_SIGNAL_REQ_WR 0x0001
82 #define RVT_S_BUSY 0x0002
83 #define RVT_S_TIMER 0x0004
84 #define RVT_S_RESP_PENDING 0x0008
85 #define RVT_S_ACK_PENDING 0x0010
86 #define RVT_S_WAIT_FENCE 0x0020
87 #define RVT_S_WAIT_RDMAR 0x0040
88 #define RVT_S_WAIT_RNR 0x0080
89 #define RVT_S_WAIT_SSN_CREDIT 0x0100
90 #define RVT_S_WAIT_DMA 0x0200
91 #define RVT_S_WAIT_PIO 0x0400
92 #define RVT_S_WAIT_TX 0x0800
93 #define RVT_S_WAIT_DMA_DESC 0x1000
94 #define RVT_S_WAIT_KMEM 0x2000
95 #define RVT_S_WAIT_PSN 0x4000
96 #define RVT_S_WAIT_ACK 0x8000
97 #define RVT_S_SEND_ONE 0x10000
98 #define RVT_S_UNLIMITED_CREDIT 0x20000
99 #define RVT_S_ECN 0x40000
100 #define RVT_S_MAX_BIT_MASK 0x800000
103 * Drivers should use s_flags starting with bit 31 down to the bit next to
108 * Wait flags that would prevent any packet type from being sent.
110 #define RVT_S_ANY_WAIT_IO \
111 (RVT_S_WAIT_PIO | RVT_S_WAIT_TX | \
112 RVT_S_WAIT_DMA_DESC | RVT_S_WAIT_KMEM)
115 * Wait flags that would prevent send work requests from making progress.
117 #define RVT_S_ANY_WAIT_SEND (RVT_S_WAIT_FENCE | RVT_S_WAIT_RDMAR | \
118 RVT_S_WAIT_RNR | RVT_S_WAIT_SSN_CREDIT | RVT_S_WAIT_DMA | \
119 RVT_S_WAIT_PSN | RVT_S_WAIT_ACK)
121 #define RVT_S_ANY_WAIT (RVT_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND)
123 /* Number of bits to pay attention to in the opcode for checking qp type */
124 #define RVT_OPCODE_QP_MASK 0xE0
126 /* Flags for checking QP state (see ib_rvt_state_ops[]) */
127 #define RVT_POST_SEND_OK 0x01
128 #define RVT_POST_RECV_OK 0x02
129 #define RVT_PROCESS_RECV_OK 0x04
130 #define RVT_PROCESS_SEND_OK 0x08
131 #define RVT_PROCESS_NEXT_SEND_OK 0x10
132 #define RVT_FLUSH_SEND 0x20
133 #define RVT_FLUSH_RECV 0x40
134 #define RVT_PROCESS_OR_FLUSH_SEND \
135 (RVT_PROCESS_SEND_OK | RVT_FLUSH_SEND)
136 #define RVT_SEND_OR_FLUSH_OR_RECV_OK \
137 (RVT_PROCESS_SEND_OK | RVT_FLUSH_SEND | RVT_PROCESS_RECV_OK)
140 * Internal send flags
142 #define RVT_SEND_RESERVE_USED IB_SEND_RESERVED_START
143 #define RVT_SEND_COMPLETION_ONLY (IB_SEND_RESERVED_START << 1)
146 * rvt_ud_wr - IB UD work plus AH cache
147 * @wr: valid IB work request
148 * @attr: pointer to an allocated AH attribute
150 * Special case the UD WR so we can keep track of the AH attributes.
152 * NOTE: This data structure is stricly ordered wr then attr. I.e the attr
153 * MUST come after wr. The ib_ud_wr is sized and copied in rvt_post_one_wr.
154 * The copy assumes that wr is first.
158 struct rdma_ah_attr *attr;
162 * Send work request queue entry.
163 * The size of the sg_list is determined when the QP is created and stored
168 struct ib_send_wr wr; /* don't use wr.sg_list */
169 struct rvt_ud_wr ud_wr;
170 struct ib_reg_wr reg_wr;
171 struct ib_rdma_wr rdma_wr;
172 struct ib_atomic_wr atomic_wr;
174 u32 psn; /* first packet sequence number */
175 u32 lpsn; /* last packet sequence number */
176 u32 ssn; /* send sequence number */
177 u32 length; /* total length of data in sg_list */
178 void *priv; /* driver dependent field */
179 struct rvt_sge sg_list[];
183 * struct rvt_krwq - kernel struct receive work request
184 * @p_lock: lock to protect producer of the kernel buffer
185 * @head: index of next entry to fill
186 * @c_lock:lock to protect consumer of the kernel buffer
187 * @tail: index of next entry to pull
188 * @count: count is aproximate of total receive enteries posted
189 * @rvt_rwqe: struct of receive work request queue entry
191 * This structure is used to contain the head pointer,
192 * tail pointer and receive work queue entries for kernel
196 spinlock_t p_lock; /* protect producer */
197 u32 head; /* new work requests posted to the head */
199 /* protect consumer */
200 spinlock_t c_lock ____cacheline_aligned_in_smp;
201 u32 tail; /* receives pull requests from here. */
202 u32 count; /* approx count of receive entries posted */
203 struct rvt_rwqe *curr_wq;
204 struct rvt_rwqe wq[];
208 * rvt_get_swqe_ah - Return the pointer to the struct rvt_ah
209 * @swqe: valid Send WQE
212 static inline struct rvt_ah *rvt_get_swqe_ah(struct rvt_swqe *swqe)
214 return ibah_to_rvtah(swqe->ud_wr.wr.ah);
218 * rvt_get_swqe_ah_attr - Return the cached ah attribute information
219 * @swqe: valid Send WQE
222 static inline struct rdma_ah_attr *rvt_get_swqe_ah_attr(struct rvt_swqe *swqe)
224 return swqe->ud_wr.attr;
228 * rvt_get_swqe_remote_qpn - Access the remote QPN value
229 * @swqe: valid Send WQE
232 static inline u32 rvt_get_swqe_remote_qpn(struct rvt_swqe *swqe)
234 return swqe->ud_wr.wr.remote_qpn;
238 * rvt_get_swqe_remote_qkey - Acces the remote qkey value
239 * @swqe: valid Send WQE
242 static inline u32 rvt_get_swqe_remote_qkey(struct rvt_swqe *swqe)
244 return swqe->ud_wr.wr.remote_qkey;
248 * rvt_get_swqe_pkey_index - Access the pkey index
249 * @swqe: valid Send WQE
252 static inline u16 rvt_get_swqe_pkey_index(struct rvt_swqe *swqe)
254 return swqe->ud_wr.wr.pkey_index;
259 struct rvt_krwq *kwq;
260 u32 size; /* size of RWQE array */
262 /* protect changes in this struct */
263 spinlock_t lock ____cacheline_aligned_in_smp;
267 * rvt_get_rq_count - count numbers of request work queue entries
269 * @rq: data structure for request queue entry
270 * @head: head indices of the circular buffer
271 * @tail: tail indices of the circular buffer
273 * Return - total number of entries in the Receive Queue
276 static inline u32 rvt_get_rq_count(struct rvt_rq *rq, u32 head, u32 tail)
278 u32 count = head - tail;
286 * This structure holds the information that the send tasklet needs
287 * to send a RDMA read response or atomic operation.
289 struct rvt_ack_entry {
290 struct rvt_sge rdma_sge;
299 #define RC_QP_SCALING_INTERVAL 5
301 #define RVT_OPERATION_PRIV 0x00000001
302 #define RVT_OPERATION_ATOMIC 0x00000002
303 #define RVT_OPERATION_ATOMIC_SGE 0x00000004
304 #define RVT_OPERATION_LOCAL 0x00000008
305 #define RVT_OPERATION_USE_RESERVE 0x00000010
306 #define RVT_OPERATION_IGN_RNR_CNT 0x00000020
308 #define RVT_OPERATION_MAX (IB_WR_RESERVED10 + 1)
311 * rvt_operation_params - op table entry
312 * @length - the length to copy into the swqe entry
313 * @qpt_support - a bit mask indicating QP type support
314 * @flags - RVT_OPERATION flags (see above)
316 * This supports table driven post send so that
317 * the driver can have differing an potentially
318 * different sets of operations.
322 struct rvt_operation_params {
329 * Common variables are protected by both r_rq.lock and s_lock in that order
330 * which only happens in modify_qp() or changing the QP 'state'.
334 void *priv; /* Driver private data */
335 /* read mostly fields above and below */
336 struct rdma_ah_attr remote_ah_attr;
337 struct rdma_ah_attr alt_ah_attr;
338 struct rvt_qp __rcu *next; /* link list for QPN hash table */
339 struct rvt_swqe *s_wq; /* send work queue */
340 struct rvt_mmap_info *ip;
342 unsigned long timeout_jiffies; /* computed from timeout */
344 int srate_mbps; /* s_srate (below) converted to Mbit/s */
345 pid_t pid; /* pid for user mode QPs */
347 u32 qkey; /* QKEY for this QP (for UD or RD) */
348 u32 s_size; /* send work queue size */
350 u16 pmtu; /* decoded from path_mtu */
351 u8 log_pmtu; /* shift for pmtu */
352 u8 state; /* QP state */
353 u8 allowed_ops; /* high order bits of allowed opcodes */
355 u8 alt_timeout; /* Alternate path timeout for this QP */
356 u8 timeout; /* Timeout for this QP */
360 u8 s_pkey_index; /* PKEY index to use */
361 u8 s_alt_pkey_index; /* Alternate path PKEY index to use */
362 u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */
363 u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */
364 u8 s_retry_cnt; /* number of times to retry */
366 u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
367 u8 s_max_sge; /* size of s_wq->sg_list */
370 /* start of read/write fields */
371 atomic_t refcount ____cacheline_aligned_in_smp;
372 wait_queue_head_t wait;
374 struct rvt_ack_entry *s_ack_queue;
375 struct rvt_sge_state s_rdma_read_sge;
377 spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
378 u32 r_psn; /* expected rcv packet sequence number */
379 unsigned long r_aflags;
380 u64 r_wr_id; /* ID for current receive WQE */
381 u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
382 u32 r_len; /* total length of r_sge */
383 u32 r_rcv_len; /* receive data len processed */
384 u32 r_msn; /* message sequence number */
386 u8 r_state; /* opcode of last packet received */
388 u8 r_head_ack_queue; /* index into s_ack_queue[] */
389 u8 r_adefered; /* defered ack count */
391 struct list_head rspwait; /* link for waiting to respond */
393 struct rvt_sge_state r_sge; /* current receive data */
394 struct rvt_rq r_rq; /* receive work queue */
397 spinlock_t s_hlock ____cacheline_aligned_in_smp;
398 u32 s_head; /* new entries added here */
399 u32 s_next_psn; /* PSN for next request */
400 u32 s_avail; /* number of entries avail */
401 u32 s_ssn; /* SSN of tail entry */
402 atomic_t s_reserved_used; /* reserved entries in use */
404 spinlock_t s_lock ____cacheline_aligned_in_smp;
406 struct rvt_sge_state *s_cur_sge;
407 struct rvt_swqe *s_wqe;
408 struct rvt_sge_state s_sge; /* current send request data */
409 struct rvt_mregion *s_rdma_mr;
410 u32 s_len; /* total length of s_sge */
411 u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
412 u32 s_last_psn; /* last response PSN processed */
413 u32 s_sending_psn; /* lowest PSN that is being sent */
414 u32 s_sending_hpsn; /* highest PSN that is being sent */
415 u32 s_psn; /* current packet sequence number */
416 u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */
417 u32 s_ack_psn; /* PSN for acking sends and RDMA writes */
418 u32 s_tail; /* next entry to process */
419 u32 s_cur; /* current work queue entry */
420 u32 s_acked; /* last un-ACK'ed entry */
421 u32 s_last; /* last completed entry */
422 u32 s_lsn; /* limit sequence number (credit) */
423 u32 s_ahgpsn; /* set to the psn in the copy of the header */
424 u16 s_cur_size; /* size of send packet in bytes */
426 u8 s_hdrwords; /* size of s_hdr in 32 bit words */
428 u8 s_state; /* opcode of last packet sent */
429 u8 s_ack_state; /* opcode of packet to ACK */
430 u8 s_nak_state; /* non-zero if NAK is pending */
431 u8 r_nak_state; /* non-zero if NAK is pending */
432 u8 s_retry; /* requester retry counter */
433 u8 s_rnr_retry; /* requester RNR retry counter */
434 u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */
435 u8 s_tail_ack_queue; /* index into s_ack_queue[] */
436 u8 s_acked_ack_queue; /* index into s_ack_queue[] */
438 struct rvt_sge_state s_ack_rdma_sge;
439 struct timer_list s_timer;
440 struct hrtimer s_rnr_timer;
442 atomic_t local_ops_pending; /* number of fast_reg/local_inv reqs */
445 * This sge list MUST be last. Do not add anything below here.
447 struct rvt_sge *r_sg_list /* verified SGEs */
448 ____cacheline_aligned_in_smp;
454 struct rvt_mmap_info *ip;
455 /* send signal when number of RWQEs < limit */
459 static inline struct rvt_srq *ibsrq_to_rvtsrq(struct ib_srq *ibsrq)
461 return container_of(ibsrq, struct rvt_srq, ibsrq);
464 static inline struct rvt_qp *ibqp_to_rvtqp(struct ib_qp *ibqp)
466 return container_of(ibqp, struct rvt_qp, ibqp);
469 #define RVT_QPN_MAX BIT(24)
470 #define RVT_QPNMAP_ENTRIES (RVT_QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
471 #define RVT_BITS_PER_PAGE (PAGE_SIZE * BITS_PER_BYTE)
472 #define RVT_BITS_PER_PAGE_MASK (RVT_BITS_PER_PAGE - 1)
473 #define RVT_QPN_MASK IB_QPN_MASK
476 * QPN-map pages start out as NULL, they get allocated upon
477 * first use and are never deallocated. This way,
478 * large bitmaps are not allocated unless large numbers of QPs are used.
484 struct rvt_qpn_table {
485 spinlock_t lock; /* protect changes to the qp table */
486 unsigned flags; /* flags for QP0/1 allocated for each port */
487 u32 last; /* last QP number allocated */
488 u32 nmaps; /* size of the map table */
491 /* bit map of free QP numbers other than 0/1 */
492 struct rvt_qpn_map map[RVT_QPNMAP_ENTRIES];
495 struct rvt_qp_ibdev {
498 struct rvt_qp __rcu **qp_table;
499 spinlock_t qpt_lock; /* qptable lock */
500 struct rvt_qpn_table qpn_table;
504 * There is one struct rvt_mcast for each multicast GID.
505 * All attached QPs are then stored as a list of
506 * struct rvt_mcast_qp.
508 struct rvt_mcast_qp {
509 struct list_head list;
513 struct rvt_mcast_addr {
519 struct rb_node rb_node;
520 struct rvt_mcast_addr mcast_addr;
521 struct list_head qp_list;
522 wait_queue_head_t wait;
528 * Since struct rvt_swqe is not a fixed size, we can't simply index into
529 * struct rvt_qp.s_wq. This function does the array index computation.
531 static inline struct rvt_swqe *rvt_get_swqe_ptr(struct rvt_qp *qp,
534 return (struct rvt_swqe *)((char *)qp->s_wq +
535 (sizeof(struct rvt_swqe) +
537 sizeof(struct rvt_sge)) * n);
541 * Since struct rvt_rwqe is not a fixed size, we can't simply index into
542 * struct rvt_rwq.wq. This function does the array index computation.
544 static inline struct rvt_rwqe *rvt_get_rwqe_ptr(struct rvt_rq *rq, unsigned n)
546 return (struct rvt_rwqe *)
547 ((char *)rq->kwq->curr_wq +
548 (sizeof(struct rvt_rwqe) +
549 rq->max_sge * sizeof(struct ib_sge)) * n);
553 * rvt_is_user_qp - return if this is user mode QP
554 * @qp - the target QP
556 static inline bool rvt_is_user_qp(struct rvt_qp *qp)
562 * rvt_get_qp - get a QP reference
563 * @qp - the QP to hold
565 static inline void rvt_get_qp(struct rvt_qp *qp)
567 atomic_inc(&qp->refcount);
571 * rvt_put_qp - release a QP reference
572 * @qp - the QP to release
574 static inline void rvt_put_qp(struct rvt_qp *qp)
576 if (qp && atomic_dec_and_test(&qp->refcount))
581 * rvt_put_swqe - drop mr refs held by swqe
582 * @wqe - the send wqe
584 * This drops any mr references held by the swqe
586 static inline void rvt_put_swqe(struct rvt_swqe *wqe)
590 for (i = 0; i < wqe->wr.num_sge; i++) {
591 struct rvt_sge *sge = &wqe->sg_list[i];
598 * rvt_qp_wqe_reserve - reserve operation
600 * @wqe - the send wqe
602 * This routine used in post send to record
603 * a wqe relative reserved operation use.
605 static inline void rvt_qp_wqe_reserve(
607 struct rvt_swqe *wqe)
609 atomic_inc(&qp->s_reserved_used);
613 * rvt_qp_wqe_unreserve - clean reserved operation
615 * @flags - send wqe flags
617 * This decrements the reserve use count.
619 * This call MUST precede the change to
620 * s_last to insure that post send sees a stable
623 * An smp_mp__after_atomic() is used to insure
624 * the compiler does not juggle the order of the s_last
625 * ring index and the decrementing of s_reserved_used.
627 static inline void rvt_qp_wqe_unreserve(struct rvt_qp *qp, int flags)
629 if (unlikely(flags & RVT_SEND_RESERVE_USED)) {
630 atomic_dec(&qp->s_reserved_used);
631 /* insure no compiler re-order up to s_last change */
632 smp_mb__after_atomic();
636 extern const enum ib_wc_opcode ib_rvt_wc_opcode[];
639 * Compare the lower 24 bits of the msn values.
640 * Returns an integer <, ==, or > than zero.
642 static inline int rvt_cmp_msn(u32 a, u32 b)
644 return (((int)a) - ((int)b)) << 8;
647 __be32 rvt_compute_aeth(struct rvt_qp *qp);
649 void rvt_get_credit(struct rvt_qp *qp, u32 aeth);
651 u32 rvt_restart_sge(struct rvt_sge_state *ss, struct rvt_swqe *wqe, u32 len);
654 * rvt_div_round_up_mtu - round up divide
658 * Perform a shift based mtu round up divide
660 static inline u32 rvt_div_round_up_mtu(struct rvt_qp *qp, u32 len)
662 return (len + qp->pmtu - 1) >> qp->log_pmtu;
669 * Perform a shift based mtu divide
671 static inline u32 rvt_div_mtu(struct rvt_qp *qp, u32 len)
673 return len >> qp->log_pmtu;
677 * rvt_timeout_to_jiffies - Convert a ULP timeout input into jiffies
678 * @timeout - timeout input(0 - 31).
680 * Return a timeout value in jiffies.
682 static inline unsigned long rvt_timeout_to_jiffies(u8 timeout)
687 return usecs_to_jiffies(1U << timeout) * 4096UL / 1000UL;
691 * rvt_lookup_qpn - return the QP with the given QPN
693 * @qpn: the QP number to look up
695 * The caller must hold the rcu_read_lock(), and keep the lock until
696 * the returned qp is no longer in use.
698 static inline struct rvt_qp *rvt_lookup_qpn(struct rvt_dev_info *rdi,
699 struct rvt_ibport *rvp,
700 u32 qpn) __must_hold(RCU)
702 struct rvt_qp *qp = NULL;
704 if (unlikely(qpn <= 1)) {
705 qp = rcu_dereference(rvp->qp[qpn]);
707 u32 n = hash_32(qpn, rdi->qp_dev->qp_table_bits);
709 for (qp = rcu_dereference(rdi->qp_dev->qp_table[n]); qp;
710 qp = rcu_dereference(qp->next))
711 if (qp->ibqp.qp_num == qpn)
718 * rvt_mod_retry_timer - mod a retry timer
720 * @shift - timeout shift to wait for multiple packets
721 * Modify a potentially already running retry timer
723 static inline void rvt_mod_retry_timer_ext(struct rvt_qp *qp, u8 shift)
725 struct ib_qp *ibqp = &qp->ibqp;
726 struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device);
728 lockdep_assert_held(&qp->s_lock);
729 qp->s_flags |= RVT_S_TIMER;
730 /* 4.096 usec. * (1 << qp->timeout) */
731 mod_timer(&qp->s_timer, jiffies + rdi->busy_jiffies +
732 (qp->timeout_jiffies << shift));
735 static inline void rvt_mod_retry_timer(struct rvt_qp *qp)
737 return rvt_mod_retry_timer_ext(qp, 0);
741 * rvt_put_qp_swqe - drop refs held by swqe
745 * This drops any references held by the swqe
747 static inline void rvt_put_qp_swqe(struct rvt_qp *qp, struct rvt_swqe *wqe)
750 if (qp->allowed_ops == IB_OPCODE_UD)
751 rdma_destroy_ah_attr(wqe->ud_wr.attr);
755 * rvt_qp_sqwe_incr - increment ring index
757 * @val: the starting value
759 * Return: the new value wrapping as appropriate
762 rvt_qp_swqe_incr(struct rvt_qp *qp, u32 val)
764 if (++val >= qp->s_size)
769 int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err);
772 * rvt_recv_cq - add a new entry to completion queue
775 * @wc: work completion entry to add
776 * @solicited: true if @entry is solicited
778 * This is wrapper function for rvt_enter_cq function call by
779 * receive queue. If rvt_cq_enter return false, it means cq is
780 * full and the qp is put into error state.
782 static inline void rvt_recv_cq(struct rvt_qp *qp, struct ib_wc *wc,
785 struct rvt_cq *cq = ibcq_to_rvtcq(qp->ibqp.recv_cq);
787 if (unlikely(!rvt_cq_enter(cq, wc, solicited)))
788 rvt_error_qp(qp, IB_WC_LOC_QP_OP_ERR);
792 * rvt_send_cq - add a new entry to completion queue
795 * @wc: work completion entry to add
796 * @solicited: true if @entry is solicited
798 * This is wrapper function for rvt_enter_cq function call by
799 * send queue. If rvt_cq_enter return false, it means cq is
800 * full and the qp is put into error state.
802 static inline void rvt_send_cq(struct rvt_qp *qp, struct ib_wc *wc,
805 struct rvt_cq *cq = ibcq_to_rvtcq(qp->ibqp.send_cq);
807 if (unlikely(!rvt_cq_enter(cq, wc, solicited)))
808 rvt_error_qp(qp, IB_WC_LOC_QP_OP_ERR);
812 * rvt_qp_complete_swqe - insert send completion
814 * @wqe - the send wqe
815 * @opcode - wc operation (driver dependent)
816 * @status - completion status
818 * Update the s_last information, and then insert a send
819 * completion into the completion
820 * queue if the qp indicates it should be done.
822 * See IBTA 10.7.3.1 for info on completion
828 rvt_qp_complete_swqe(struct rvt_qp *qp,
829 struct rvt_swqe *wqe,
830 enum ib_wc_opcode opcode,
831 enum ib_wc_status status)
833 bool need_completion;
836 int flags = wqe->wr.send_flags;
838 rvt_qp_wqe_unreserve(qp, flags);
839 rvt_put_qp_swqe(qp, wqe);
842 !(flags & RVT_SEND_RESERVE_USED) &&
843 (!(qp->s_flags & RVT_S_SIGNAL_REQ_WR) ||
844 (flags & IB_SEND_SIGNALED) ||
845 status != IB_WC_SUCCESS);
846 if (need_completion) {
847 wr_id = wqe->wr.wr_id;
848 byte_len = wqe->length;
849 /* above fields required before writing s_last */
851 last = rvt_qp_swqe_incr(qp, qp->s_last);
852 /* see rvt_qp_is_avail() */
853 smp_store_release(&qp->s_last, last);
854 if (need_completion) {
860 .byte_len = byte_len,
862 rvt_send_cq(qp, &w, status != IB_WC_SUCCESS);
867 extern const int ib_rvt_state_ops[];
870 int rvt_get_rwqe(struct rvt_qp *qp, bool wr_id_only);
871 void rvt_comm_est(struct rvt_qp *qp);
872 void rvt_rc_error(struct rvt_qp *qp, enum ib_wc_status err);
873 unsigned long rvt_rnr_tbl_to_usec(u32 index);
874 enum hrtimer_restart rvt_rc_rnr_retry(struct hrtimer *t);
875 void rvt_add_rnr_timer(struct rvt_qp *qp, u32 aeth);
876 void rvt_del_timers_sync(struct rvt_qp *qp);
877 void rvt_stop_rc_timers(struct rvt_qp *qp);
878 void rvt_add_retry_timer_ext(struct rvt_qp *qp, u8 shift);
879 static inline void rvt_add_retry_timer(struct rvt_qp *qp)
881 rvt_add_retry_timer_ext(qp, 0);
884 void rvt_copy_sge(struct rvt_qp *qp, struct rvt_sge_state *ss,
885 void *data, u32 length,
886 bool release, bool copy_last);
887 void rvt_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
888 enum ib_wc_status status);
889 void rvt_ruc_loopback(struct rvt_qp *qp);
892 * struct rvt_qp_iter - the iterator for QPs
893 * @qp - the current QP
895 * This structure defines the current iterator
896 * state for sequenced access to all QPs relative
897 * to an rvt_dev_info.
901 /* private: backpointer */
902 struct rvt_dev_info *rdi;
903 /* private: callback routine */
904 void (*cb)(struct rvt_qp *qp, u64 v);
905 /* private: for arg to callback routine */
907 /* private: number of SMI,GSI QPs for device */
909 /* private: current iterator index */
914 * ib_cq_tail - Return tail index of cq buffer
915 * @send_cq - The cq for send
917 * This is called in qp_iter_print to get tail
920 static inline u32 ib_cq_tail(struct ib_cq *send_cq)
922 struct rvt_cq *cq = ibcq_to_rvtcq(send_cq);
924 return ibcq_to_rvtcq(send_cq)->ip ?
925 RDMA_READ_UAPI_ATOMIC(cq->queue->tail) :
926 ibcq_to_rvtcq(send_cq)->kqueue->tail;
930 * ib_cq_head - Return head index of cq buffer
931 * @send_cq - The cq for send
933 * This is called in qp_iter_print to get head
936 static inline u32 ib_cq_head(struct ib_cq *send_cq)
938 struct rvt_cq *cq = ibcq_to_rvtcq(send_cq);
940 return ibcq_to_rvtcq(send_cq)->ip ?
941 RDMA_READ_UAPI_ATOMIC(cq->queue->head) :
942 ibcq_to_rvtcq(send_cq)->kqueue->head;
946 * rvt_free_rq - free memory allocated for rvt_rq struct
947 * @rvt_rq: request queue data structure
949 * This function should only be called if the rvt_mmap_info()
952 static inline void rvt_free_rq(struct rvt_rq *rq)
961 * rvt_to_iport - Get the ibport pointer
962 * @qp: the qp pointer
964 * This function returns the ibport pointer from the qp pointer.
966 static inline struct rvt_ibport *rvt_to_iport(struct rvt_qp *qp)
968 struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device);
970 return rdi->ports[qp->port_num - 1];
974 * rvt_rc_credit_avail - Check if there are enough RC credits for the request
978 * This function returns false when there are not enough credits for the given
979 * request and true otherwise.
981 static inline bool rvt_rc_credit_avail(struct rvt_qp *qp, struct rvt_swqe *wqe)
983 lockdep_assert_held(&qp->s_lock);
984 if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT) &&
985 rvt_cmp_msn(wqe->ssn, qp->s_lsn + 1) > 0) {
986 struct rvt_ibport *rvp = rvt_to_iport(qp);
988 qp->s_flags |= RVT_S_WAIT_SSN_CREDIT;
995 struct rvt_qp_iter *rvt_qp_iter_init(struct rvt_dev_info *rdi,
997 void (*cb)(struct rvt_qp *qp, u64 v));
998 int rvt_qp_iter_next(struct rvt_qp_iter *iter);
999 void rvt_qp_iter(struct rvt_dev_info *rdi,
1001 void (*cb)(struct rvt_qp *qp, u64 v));
1002 void rvt_qp_mr_clean(struct rvt_qp *qp, u32 lkey);
1003 #endif /* DEF_RDMAVT_INCQP_H */