1 #ifndef DEF_RDMAVT_INCQP_H
2 #define DEF_RDMAVT_INCQP_H
5 * Copyright(c) 2016 - 2020 Intel Corporation.
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51 #include <rdma/rdma_vt.h>
52 #include <rdma/ib_pack.h>
53 #include <rdma/ib_verbs.h>
54 #include <rdma/rdmavt_cq.h>
55 #include <rdma/rvt-abi.h>
57 * Atomic bit definitions for r_aflags.
59 #define RVT_R_WRID_VALID 0
60 #define RVT_R_REWIND_SGE 1
63 * Bit definitions for r_flags.
65 #define RVT_R_REUSE_SGE 0x01
66 #define RVT_R_RDMAR_SEQ 0x02
67 #define RVT_R_RSP_NAK 0x04
68 #define RVT_R_RSP_SEND 0x08
69 #define RVT_R_COMM_EST 0x10
72 * If a packet's QP[23:16] bits match this value, then it is
73 * a PSM packet and the hardware will expect a KDETH header
76 #define RVT_KDETH_QP_PREFIX 0x80
77 #define RVT_KDETH_QP_SUFFIX 0xffff
78 #define RVT_KDETH_QP_PREFIX_MASK 0x00ff0000
79 #define RVT_KDETH_QP_PREFIX_SHIFT 16
80 #define RVT_KDETH_QP_BASE (u32)(RVT_KDETH_QP_PREFIX << \
81 RVT_KDETH_QP_PREFIX_SHIFT)
82 #define RVT_KDETH_QP_MAX (u32)(RVT_KDETH_QP_BASE + RVT_KDETH_QP_SUFFIX)
85 * If a packet's LNH == BTH and DEST QPN[23:16] in the BTH match this
86 * prefix value, then it is an AIP packet with a DETH containing the entropy
87 * value in byte 4 following the BTH.
89 #define RVT_AIP_QP_PREFIX 0x81
90 #define RVT_AIP_QP_SUFFIX 0xffff
91 #define RVT_AIP_QP_PREFIX_MASK 0x00ff0000
92 #define RVT_AIP_QP_PREFIX_SHIFT 16
93 #define RVT_AIP_QP_BASE (u32)(RVT_AIP_QP_PREFIX << \
94 RVT_AIP_QP_PREFIX_SHIFT)
95 #define RVT_AIP_QPN_MAX BIT(RVT_AIP_QP_PREFIX_SHIFT)
96 #define RVT_AIP_QP_MAX (u32)(RVT_AIP_QP_BASE + RVT_AIP_QPN_MAX - 1)
99 * Bit definitions for s_flags.
101 * RVT_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
102 * RVT_S_BUSY - send tasklet is processing the QP
103 * RVT_S_TIMER - the RC retry timer is active
104 * RVT_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
105 * RVT_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
106 * before processing the next SWQE
107 * RVT_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
108 * before processing the next SWQE
109 * RVT_S_WAIT_RNR - waiting for RNR timeout
110 * RVT_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
111 * RVT_S_WAIT_DMA - waiting for send DMA queue to drain before generating
112 * next send completion entry not via send DMA
113 * RVT_S_WAIT_PIO - waiting for a send buffer to be available
114 * RVT_S_WAIT_TX - waiting for a struct verbs_txreq to be available
115 * RVT_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
116 * RVT_S_WAIT_KMEM - waiting for kernel memory to be available
117 * RVT_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
118 * RVT_S_WAIT_ACK - waiting for an ACK packet before sending more requests
119 * RVT_S_SEND_ONE - send one packet, request ACK, then wait for ACK
120 * RVT_S_ECN - a BECN was queued to the send engine
121 * RVT_S_MAX_BIT_MASK - The max bit that can be used by rdmavt
123 #define RVT_S_SIGNAL_REQ_WR 0x0001
124 #define RVT_S_BUSY 0x0002
125 #define RVT_S_TIMER 0x0004
126 #define RVT_S_RESP_PENDING 0x0008
127 #define RVT_S_ACK_PENDING 0x0010
128 #define RVT_S_WAIT_FENCE 0x0020
129 #define RVT_S_WAIT_RDMAR 0x0040
130 #define RVT_S_WAIT_RNR 0x0080
131 #define RVT_S_WAIT_SSN_CREDIT 0x0100
132 #define RVT_S_WAIT_DMA 0x0200
133 #define RVT_S_WAIT_PIO 0x0400
134 #define RVT_S_WAIT_TX 0x0800
135 #define RVT_S_WAIT_DMA_DESC 0x1000
136 #define RVT_S_WAIT_KMEM 0x2000
137 #define RVT_S_WAIT_PSN 0x4000
138 #define RVT_S_WAIT_ACK 0x8000
139 #define RVT_S_SEND_ONE 0x10000
140 #define RVT_S_UNLIMITED_CREDIT 0x20000
141 #define RVT_S_ECN 0x40000
142 #define RVT_S_MAX_BIT_MASK 0x800000
145 * Drivers should use s_flags starting with bit 31 down to the bit next to
150 * Wait flags that would prevent any packet type from being sent.
152 #define RVT_S_ANY_WAIT_IO \
153 (RVT_S_WAIT_PIO | RVT_S_WAIT_TX | \
154 RVT_S_WAIT_DMA_DESC | RVT_S_WAIT_KMEM)
157 * Wait flags that would prevent send work requests from making progress.
159 #define RVT_S_ANY_WAIT_SEND (RVT_S_WAIT_FENCE | RVT_S_WAIT_RDMAR | \
160 RVT_S_WAIT_RNR | RVT_S_WAIT_SSN_CREDIT | RVT_S_WAIT_DMA | \
161 RVT_S_WAIT_PSN | RVT_S_WAIT_ACK)
163 #define RVT_S_ANY_WAIT (RVT_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND)
165 /* Number of bits to pay attention to in the opcode for checking qp type */
166 #define RVT_OPCODE_QP_MASK 0xE0
168 /* Flags for checking QP state (see ib_rvt_state_ops[]) */
169 #define RVT_POST_SEND_OK 0x01
170 #define RVT_POST_RECV_OK 0x02
171 #define RVT_PROCESS_RECV_OK 0x04
172 #define RVT_PROCESS_SEND_OK 0x08
173 #define RVT_PROCESS_NEXT_SEND_OK 0x10
174 #define RVT_FLUSH_SEND 0x20
175 #define RVT_FLUSH_RECV 0x40
176 #define RVT_PROCESS_OR_FLUSH_SEND \
177 (RVT_PROCESS_SEND_OK | RVT_FLUSH_SEND)
178 #define RVT_SEND_OR_FLUSH_OR_RECV_OK \
179 (RVT_PROCESS_SEND_OK | RVT_FLUSH_SEND | RVT_PROCESS_RECV_OK)
182 * Internal send flags
184 #define RVT_SEND_RESERVE_USED IB_SEND_RESERVED_START
185 #define RVT_SEND_COMPLETION_ONLY (IB_SEND_RESERVED_START << 1)
188 * rvt_ud_wr - IB UD work plus AH cache
189 * @wr: valid IB work request
190 * @attr: pointer to an allocated AH attribute
192 * Special case the UD WR so we can keep track of the AH attributes.
194 * NOTE: This data structure is stricly ordered wr then attr. I.e the attr
195 * MUST come after wr. The ib_ud_wr is sized and copied in rvt_post_one_wr.
196 * The copy assumes that wr is first.
200 struct rdma_ah_attr *attr;
204 * Send work request queue entry.
205 * The size of the sg_list is determined when the QP is created and stored
210 struct ib_send_wr wr; /* don't use wr.sg_list */
211 struct rvt_ud_wr ud_wr;
212 struct ib_reg_wr reg_wr;
213 struct ib_rdma_wr rdma_wr;
214 struct ib_atomic_wr atomic_wr;
216 u32 psn; /* first packet sequence number */
217 u32 lpsn; /* last packet sequence number */
218 u32 ssn; /* send sequence number */
219 u32 length; /* total length of data in sg_list */
220 void *priv; /* driver dependent field */
221 struct rvt_sge sg_list[];
225 * struct rvt_krwq - kernel struct receive work request
226 * @p_lock: lock to protect producer of the kernel buffer
227 * @head: index of next entry to fill
228 * @c_lock:lock to protect consumer of the kernel buffer
229 * @tail: index of next entry to pull
230 * @count: count is aproximate of total receive enteries posted
231 * @rvt_rwqe: struct of receive work request queue entry
233 * This structure is used to contain the head pointer,
234 * tail pointer and receive work queue entries for kernel
238 spinlock_t p_lock; /* protect producer */
239 u32 head; /* new work requests posted to the head */
241 /* protect consumer */
242 spinlock_t c_lock ____cacheline_aligned_in_smp;
243 u32 tail; /* receives pull requests from here. */
244 u32 count; /* approx count of receive entries posted */
245 struct rvt_rwqe *curr_wq;
246 struct rvt_rwqe wq[];
250 * rvt_get_swqe_ah - Return the pointer to the struct rvt_ah
251 * @swqe: valid Send WQE
254 static inline struct rvt_ah *rvt_get_swqe_ah(struct rvt_swqe *swqe)
256 return ibah_to_rvtah(swqe->ud_wr.wr.ah);
260 * rvt_get_swqe_ah_attr - Return the cached ah attribute information
261 * @swqe: valid Send WQE
264 static inline struct rdma_ah_attr *rvt_get_swqe_ah_attr(struct rvt_swqe *swqe)
266 return swqe->ud_wr.attr;
270 * rvt_get_swqe_remote_qpn - Access the remote QPN value
271 * @swqe: valid Send WQE
274 static inline u32 rvt_get_swqe_remote_qpn(struct rvt_swqe *swqe)
276 return swqe->ud_wr.wr.remote_qpn;
280 * rvt_get_swqe_remote_qkey - Acces the remote qkey value
281 * @swqe: valid Send WQE
284 static inline u32 rvt_get_swqe_remote_qkey(struct rvt_swqe *swqe)
286 return swqe->ud_wr.wr.remote_qkey;
290 * rvt_get_swqe_pkey_index - Access the pkey index
291 * @swqe: valid Send WQE
294 static inline u16 rvt_get_swqe_pkey_index(struct rvt_swqe *swqe)
296 return swqe->ud_wr.wr.pkey_index;
301 struct rvt_krwq *kwq;
302 u32 size; /* size of RWQE array */
304 /* protect changes in this struct */
305 spinlock_t lock ____cacheline_aligned_in_smp;
309 * rvt_get_rq_count - count numbers of request work queue entries
311 * @rq: data structure for request queue entry
312 * @head: head indices of the circular buffer
313 * @tail: tail indices of the circular buffer
315 * Return - total number of entries in the Receive Queue
318 static inline u32 rvt_get_rq_count(struct rvt_rq *rq, u32 head, u32 tail)
320 u32 count = head - tail;
328 * This structure holds the information that the send tasklet needs
329 * to send a RDMA read response or atomic operation.
331 struct rvt_ack_entry {
332 struct rvt_sge rdma_sge;
341 #define RC_QP_SCALING_INTERVAL 5
343 #define RVT_OPERATION_PRIV 0x00000001
344 #define RVT_OPERATION_ATOMIC 0x00000002
345 #define RVT_OPERATION_ATOMIC_SGE 0x00000004
346 #define RVT_OPERATION_LOCAL 0x00000008
347 #define RVT_OPERATION_USE_RESERVE 0x00000010
348 #define RVT_OPERATION_IGN_RNR_CNT 0x00000020
350 #define RVT_OPERATION_MAX (IB_WR_RESERVED10 + 1)
353 * rvt_operation_params - op table entry
354 * @length - the length to copy into the swqe entry
355 * @qpt_support - a bit mask indicating QP type support
356 * @flags - RVT_OPERATION flags (see above)
358 * This supports table driven post send so that
359 * the driver can have differing an potentially
360 * different sets of operations.
364 struct rvt_operation_params {
371 * Common variables are protected by both r_rq.lock and s_lock in that order
372 * which only happens in modify_qp() or changing the QP 'state'.
376 void *priv; /* Driver private data */
377 /* read mostly fields above and below */
378 struct rdma_ah_attr remote_ah_attr;
379 struct rdma_ah_attr alt_ah_attr;
380 struct rvt_qp __rcu *next; /* link list for QPN hash table */
381 struct rvt_swqe *s_wq; /* send work queue */
382 struct rvt_mmap_info *ip;
384 unsigned long timeout_jiffies; /* computed from timeout */
386 int srate_mbps; /* s_srate (below) converted to Mbit/s */
387 pid_t pid; /* pid for user mode QPs */
389 u32 qkey; /* QKEY for this QP (for UD or RD) */
390 u32 s_size; /* send work queue size */
392 u16 pmtu; /* decoded from path_mtu */
393 u8 log_pmtu; /* shift for pmtu */
394 u8 state; /* QP state */
395 u8 allowed_ops; /* high order bits of allowed opcodes */
397 u8 alt_timeout; /* Alternate path timeout for this QP */
398 u8 timeout; /* Timeout for this QP */
402 u8 s_pkey_index; /* PKEY index to use */
403 u8 s_alt_pkey_index; /* Alternate path PKEY index to use */
404 u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */
405 u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */
406 u8 s_retry_cnt; /* number of times to retry */
408 u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
409 u8 s_max_sge; /* size of s_wq->sg_list */
412 /* start of read/write fields */
413 atomic_t refcount ____cacheline_aligned_in_smp;
414 wait_queue_head_t wait;
416 struct rvt_ack_entry *s_ack_queue;
417 struct rvt_sge_state s_rdma_read_sge;
419 spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
420 u32 r_psn; /* expected rcv packet sequence number */
421 unsigned long r_aflags;
422 u64 r_wr_id; /* ID for current receive WQE */
423 u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
424 u32 r_len; /* total length of r_sge */
425 u32 r_rcv_len; /* receive data len processed */
426 u32 r_msn; /* message sequence number */
428 u8 r_state; /* opcode of last packet received */
430 u8 r_head_ack_queue; /* index into s_ack_queue[] */
431 u8 r_adefered; /* defered ack count */
433 struct list_head rspwait; /* link for waiting to respond */
435 struct rvt_sge_state r_sge; /* current receive data */
436 struct rvt_rq r_rq; /* receive work queue */
439 spinlock_t s_hlock ____cacheline_aligned_in_smp;
440 u32 s_head; /* new entries added here */
441 u32 s_next_psn; /* PSN for next request */
442 u32 s_avail; /* number of entries avail */
443 u32 s_ssn; /* SSN of tail entry */
444 atomic_t s_reserved_used; /* reserved entries in use */
446 spinlock_t s_lock ____cacheline_aligned_in_smp;
448 struct rvt_sge_state *s_cur_sge;
449 struct rvt_swqe *s_wqe;
450 struct rvt_sge_state s_sge; /* current send request data */
451 struct rvt_mregion *s_rdma_mr;
452 u32 s_len; /* total length of s_sge */
453 u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
454 u32 s_last_psn; /* last response PSN processed */
455 u32 s_sending_psn; /* lowest PSN that is being sent */
456 u32 s_sending_hpsn; /* highest PSN that is being sent */
457 u32 s_psn; /* current packet sequence number */
458 u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */
459 u32 s_ack_psn; /* PSN for acking sends and RDMA writes */
460 u32 s_tail; /* next entry to process */
461 u32 s_cur; /* current work queue entry */
462 u32 s_acked; /* last un-ACK'ed entry */
463 u32 s_last; /* last completed entry */
464 u32 s_lsn; /* limit sequence number (credit) */
465 u32 s_ahgpsn; /* set to the psn in the copy of the header */
466 u16 s_cur_size; /* size of send packet in bytes */
468 u8 s_hdrwords; /* size of s_hdr in 32 bit words */
470 u8 s_state; /* opcode of last packet sent */
471 u8 s_ack_state; /* opcode of packet to ACK */
472 u8 s_nak_state; /* non-zero if NAK is pending */
473 u8 r_nak_state; /* non-zero if NAK is pending */
474 u8 s_retry; /* requester retry counter */
475 u8 s_rnr_retry; /* requester RNR retry counter */
476 u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */
477 u8 s_tail_ack_queue; /* index into s_ack_queue[] */
478 u8 s_acked_ack_queue; /* index into s_ack_queue[] */
480 struct rvt_sge_state s_ack_rdma_sge;
481 struct timer_list s_timer;
482 struct hrtimer s_rnr_timer;
484 atomic_t local_ops_pending; /* number of fast_reg/local_inv reqs */
487 * This sge list MUST be last. Do not add anything below here.
489 struct rvt_sge r_sg_list[] /* verified SGEs */
490 ____cacheline_aligned_in_smp;
496 struct rvt_mmap_info *ip;
497 /* send signal when number of RWQEs < limit */
501 static inline struct rvt_srq *ibsrq_to_rvtsrq(struct ib_srq *ibsrq)
503 return container_of(ibsrq, struct rvt_srq, ibsrq);
506 static inline struct rvt_qp *ibqp_to_rvtqp(struct ib_qp *ibqp)
508 return container_of(ibqp, struct rvt_qp, ibqp);
511 #define RVT_QPN_MAX BIT(24)
512 #define RVT_QPNMAP_ENTRIES (RVT_QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
513 #define RVT_BITS_PER_PAGE (PAGE_SIZE * BITS_PER_BYTE)
514 #define RVT_BITS_PER_PAGE_MASK (RVT_BITS_PER_PAGE - 1)
515 #define RVT_QPN_MASK IB_QPN_MASK
518 * QPN-map pages start out as NULL, they get allocated upon
519 * first use and are never deallocated. This way,
520 * large bitmaps are not allocated unless large numbers of QPs are used.
526 struct rvt_qpn_table {
527 spinlock_t lock; /* protect changes to the qp table */
528 unsigned flags; /* flags for QP0/1 allocated for each port */
529 u32 last; /* last QP number allocated */
530 u32 nmaps; /* size of the map table */
533 /* bit map of free QP numbers other than 0/1 */
534 struct rvt_qpn_map map[RVT_QPNMAP_ENTRIES];
537 struct rvt_qp_ibdev {
540 struct rvt_qp __rcu **qp_table;
541 spinlock_t qpt_lock; /* qptable lock */
542 struct rvt_qpn_table qpn_table;
546 * There is one struct rvt_mcast for each multicast GID.
547 * All attached QPs are then stored as a list of
548 * struct rvt_mcast_qp.
550 struct rvt_mcast_qp {
551 struct list_head list;
555 struct rvt_mcast_addr {
561 struct rb_node rb_node;
562 struct rvt_mcast_addr mcast_addr;
563 struct list_head qp_list;
564 wait_queue_head_t wait;
570 * Since struct rvt_swqe is not a fixed size, we can't simply index into
571 * struct rvt_qp.s_wq. This function does the array index computation.
573 static inline struct rvt_swqe *rvt_get_swqe_ptr(struct rvt_qp *qp,
576 return (struct rvt_swqe *)((char *)qp->s_wq +
577 (sizeof(struct rvt_swqe) +
579 sizeof(struct rvt_sge)) * n);
583 * Since struct rvt_rwqe is not a fixed size, we can't simply index into
584 * struct rvt_rwq.wq. This function does the array index computation.
586 static inline struct rvt_rwqe *rvt_get_rwqe_ptr(struct rvt_rq *rq, unsigned n)
588 return (struct rvt_rwqe *)
589 ((char *)rq->kwq->curr_wq +
590 (sizeof(struct rvt_rwqe) +
591 rq->max_sge * sizeof(struct ib_sge)) * n);
595 * rvt_is_user_qp - return if this is user mode QP
596 * @qp - the target QP
598 static inline bool rvt_is_user_qp(struct rvt_qp *qp)
604 * rvt_get_qp - get a QP reference
605 * @qp - the QP to hold
607 static inline void rvt_get_qp(struct rvt_qp *qp)
609 atomic_inc(&qp->refcount);
613 * rvt_put_qp - release a QP reference
614 * @qp - the QP to release
616 static inline void rvt_put_qp(struct rvt_qp *qp)
618 if (qp && atomic_dec_and_test(&qp->refcount))
623 * rvt_put_swqe - drop mr refs held by swqe
624 * @wqe - the send wqe
626 * This drops any mr references held by the swqe
628 static inline void rvt_put_swqe(struct rvt_swqe *wqe)
632 for (i = 0; i < wqe->wr.num_sge; i++) {
633 struct rvt_sge *sge = &wqe->sg_list[i];
640 * rvt_qp_wqe_reserve - reserve operation
642 * @wqe - the send wqe
644 * This routine used in post send to record
645 * a wqe relative reserved operation use.
647 static inline void rvt_qp_wqe_reserve(
649 struct rvt_swqe *wqe)
651 atomic_inc(&qp->s_reserved_used);
655 * rvt_qp_wqe_unreserve - clean reserved operation
657 * @flags - send wqe flags
659 * This decrements the reserve use count.
661 * This call MUST precede the change to
662 * s_last to insure that post send sees a stable
665 * An smp_mp__after_atomic() is used to insure
666 * the compiler does not juggle the order of the s_last
667 * ring index and the decrementing of s_reserved_used.
669 static inline void rvt_qp_wqe_unreserve(struct rvt_qp *qp, int flags)
671 if (unlikely(flags & RVT_SEND_RESERVE_USED)) {
672 atomic_dec(&qp->s_reserved_used);
673 /* insure no compiler re-order up to s_last change */
674 smp_mb__after_atomic();
678 extern const enum ib_wc_opcode ib_rvt_wc_opcode[];
681 * Compare the lower 24 bits of the msn values.
682 * Returns an integer <, ==, or > than zero.
684 static inline int rvt_cmp_msn(u32 a, u32 b)
686 return (((int)a) - ((int)b)) << 8;
689 __be32 rvt_compute_aeth(struct rvt_qp *qp);
691 void rvt_get_credit(struct rvt_qp *qp, u32 aeth);
693 u32 rvt_restart_sge(struct rvt_sge_state *ss, struct rvt_swqe *wqe, u32 len);
696 * rvt_div_round_up_mtu - round up divide
700 * Perform a shift based mtu round up divide
702 static inline u32 rvt_div_round_up_mtu(struct rvt_qp *qp, u32 len)
704 return (len + qp->pmtu - 1) >> qp->log_pmtu;
711 * Perform a shift based mtu divide
713 static inline u32 rvt_div_mtu(struct rvt_qp *qp, u32 len)
715 return len >> qp->log_pmtu;
719 * rvt_timeout_to_jiffies - Convert a ULP timeout input into jiffies
720 * @timeout - timeout input(0 - 31).
722 * Return a timeout value in jiffies.
724 static inline unsigned long rvt_timeout_to_jiffies(u8 timeout)
729 return usecs_to_jiffies(1U << timeout) * 4096UL / 1000UL;
733 * rvt_lookup_qpn - return the QP with the given QPN
735 * @qpn: the QP number to look up
737 * The caller must hold the rcu_read_lock(), and keep the lock until
738 * the returned qp is no longer in use.
740 static inline struct rvt_qp *rvt_lookup_qpn(struct rvt_dev_info *rdi,
741 struct rvt_ibport *rvp,
742 u32 qpn) __must_hold(RCU)
744 struct rvt_qp *qp = NULL;
746 if (unlikely(qpn <= 1)) {
747 qp = rcu_dereference(rvp->qp[qpn]);
749 u32 n = hash_32(qpn, rdi->qp_dev->qp_table_bits);
751 for (qp = rcu_dereference(rdi->qp_dev->qp_table[n]); qp;
752 qp = rcu_dereference(qp->next))
753 if (qp->ibqp.qp_num == qpn)
760 * rvt_mod_retry_timer - mod a retry timer
762 * @shift - timeout shift to wait for multiple packets
763 * Modify a potentially already running retry timer
765 static inline void rvt_mod_retry_timer_ext(struct rvt_qp *qp, u8 shift)
767 struct ib_qp *ibqp = &qp->ibqp;
768 struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device);
770 lockdep_assert_held(&qp->s_lock);
771 qp->s_flags |= RVT_S_TIMER;
772 /* 4.096 usec. * (1 << qp->timeout) */
773 mod_timer(&qp->s_timer, jiffies + rdi->busy_jiffies +
774 (qp->timeout_jiffies << shift));
777 static inline void rvt_mod_retry_timer(struct rvt_qp *qp)
779 return rvt_mod_retry_timer_ext(qp, 0);
783 * rvt_put_qp_swqe - drop refs held by swqe
787 * This drops any references held by the swqe
789 static inline void rvt_put_qp_swqe(struct rvt_qp *qp, struct rvt_swqe *wqe)
792 if (qp->allowed_ops == IB_OPCODE_UD)
793 rdma_destroy_ah_attr(wqe->ud_wr.attr);
797 * rvt_qp_sqwe_incr - increment ring index
799 * @val: the starting value
801 * Return: the new value wrapping as appropriate
804 rvt_qp_swqe_incr(struct rvt_qp *qp, u32 val)
806 if (++val >= qp->s_size)
811 int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err);
814 * rvt_recv_cq - add a new entry to completion queue
817 * @wc: work completion entry to add
818 * @solicited: true if @entry is solicited
820 * This is wrapper function for rvt_enter_cq function call by
821 * receive queue. If rvt_cq_enter return false, it means cq is
822 * full and the qp is put into error state.
824 static inline void rvt_recv_cq(struct rvt_qp *qp, struct ib_wc *wc,
827 struct rvt_cq *cq = ibcq_to_rvtcq(qp->ibqp.recv_cq);
829 if (unlikely(!rvt_cq_enter(cq, wc, solicited)))
830 rvt_error_qp(qp, IB_WC_LOC_QP_OP_ERR);
834 * rvt_send_cq - add a new entry to completion queue
837 * @wc: work completion entry to add
838 * @solicited: true if @entry is solicited
840 * This is wrapper function for rvt_enter_cq function call by
841 * send queue. If rvt_cq_enter return false, it means cq is
842 * full and the qp is put into error state.
844 static inline void rvt_send_cq(struct rvt_qp *qp, struct ib_wc *wc,
847 struct rvt_cq *cq = ibcq_to_rvtcq(qp->ibqp.send_cq);
849 if (unlikely(!rvt_cq_enter(cq, wc, solicited)))
850 rvt_error_qp(qp, IB_WC_LOC_QP_OP_ERR);
854 * rvt_qp_complete_swqe - insert send completion
856 * @wqe - the send wqe
857 * @opcode - wc operation (driver dependent)
858 * @status - completion status
860 * Update the s_last information, and then insert a send
861 * completion into the completion
862 * queue if the qp indicates it should be done.
864 * See IBTA 10.7.3.1 for info on completion
870 rvt_qp_complete_swqe(struct rvt_qp *qp,
871 struct rvt_swqe *wqe,
872 enum ib_wc_opcode opcode,
873 enum ib_wc_status status)
875 bool need_completion;
878 int flags = wqe->wr.send_flags;
880 rvt_qp_wqe_unreserve(qp, flags);
881 rvt_put_qp_swqe(qp, wqe);
884 !(flags & RVT_SEND_RESERVE_USED) &&
885 (!(qp->s_flags & RVT_S_SIGNAL_REQ_WR) ||
886 (flags & IB_SEND_SIGNALED) ||
887 status != IB_WC_SUCCESS);
888 if (need_completion) {
889 wr_id = wqe->wr.wr_id;
890 byte_len = wqe->length;
891 /* above fields required before writing s_last */
893 last = rvt_qp_swqe_incr(qp, qp->s_last);
894 /* see rvt_qp_is_avail() */
895 smp_store_release(&qp->s_last, last);
896 if (need_completion) {
902 .byte_len = byte_len,
904 rvt_send_cq(qp, &w, status != IB_WC_SUCCESS);
909 extern const int ib_rvt_state_ops[];
912 int rvt_get_rwqe(struct rvt_qp *qp, bool wr_id_only);
913 void rvt_comm_est(struct rvt_qp *qp);
914 void rvt_rc_error(struct rvt_qp *qp, enum ib_wc_status err);
915 unsigned long rvt_rnr_tbl_to_usec(u32 index);
916 enum hrtimer_restart rvt_rc_rnr_retry(struct hrtimer *t);
917 void rvt_add_rnr_timer(struct rvt_qp *qp, u32 aeth);
918 void rvt_del_timers_sync(struct rvt_qp *qp);
919 void rvt_stop_rc_timers(struct rvt_qp *qp);
920 void rvt_add_retry_timer_ext(struct rvt_qp *qp, u8 shift);
921 static inline void rvt_add_retry_timer(struct rvt_qp *qp)
923 rvt_add_retry_timer_ext(qp, 0);
926 void rvt_copy_sge(struct rvt_qp *qp, struct rvt_sge_state *ss,
927 void *data, u32 length,
928 bool release, bool copy_last);
929 void rvt_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
930 enum ib_wc_status status);
931 void rvt_ruc_loopback(struct rvt_qp *qp);
934 * struct rvt_qp_iter - the iterator for QPs
935 * @qp - the current QP
937 * This structure defines the current iterator
938 * state for sequenced access to all QPs relative
939 * to an rvt_dev_info.
943 /* private: backpointer */
944 struct rvt_dev_info *rdi;
945 /* private: callback routine */
946 void (*cb)(struct rvt_qp *qp, u64 v);
947 /* private: for arg to callback routine */
949 /* private: number of SMI,GSI QPs for device */
951 /* private: current iterator index */
956 * ib_cq_tail - Return tail index of cq buffer
957 * @send_cq - The cq for send
959 * This is called in qp_iter_print to get tail
962 static inline u32 ib_cq_tail(struct ib_cq *send_cq)
964 struct rvt_cq *cq = ibcq_to_rvtcq(send_cq);
966 return ibcq_to_rvtcq(send_cq)->ip ?
967 RDMA_READ_UAPI_ATOMIC(cq->queue->tail) :
968 ibcq_to_rvtcq(send_cq)->kqueue->tail;
972 * ib_cq_head - Return head index of cq buffer
973 * @send_cq - The cq for send
975 * This is called in qp_iter_print to get head
978 static inline u32 ib_cq_head(struct ib_cq *send_cq)
980 struct rvt_cq *cq = ibcq_to_rvtcq(send_cq);
982 return ibcq_to_rvtcq(send_cq)->ip ?
983 RDMA_READ_UAPI_ATOMIC(cq->queue->head) :
984 ibcq_to_rvtcq(send_cq)->kqueue->head;
988 * rvt_free_rq - free memory allocated for rvt_rq struct
989 * @rvt_rq: request queue data structure
991 * This function should only be called if the rvt_mmap_info()
994 static inline void rvt_free_rq(struct rvt_rq *rq)
1003 * rvt_to_iport - Get the ibport pointer
1004 * @qp: the qp pointer
1006 * This function returns the ibport pointer from the qp pointer.
1008 static inline struct rvt_ibport *rvt_to_iport(struct rvt_qp *qp)
1010 struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device);
1012 return rdi->ports[qp->port_num - 1];
1016 * rvt_rc_credit_avail - Check if there are enough RC credits for the request
1020 * This function returns false when there are not enough credits for the given
1021 * request and true otherwise.
1023 static inline bool rvt_rc_credit_avail(struct rvt_qp *qp, struct rvt_swqe *wqe)
1025 lockdep_assert_held(&qp->s_lock);
1026 if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT) &&
1027 rvt_cmp_msn(wqe->ssn, qp->s_lsn + 1) > 0) {
1028 struct rvt_ibport *rvp = rvt_to_iport(qp);
1030 qp->s_flags |= RVT_S_WAIT_SSN_CREDIT;
1031 rvp->n_rc_crwaits++;
1037 struct rvt_qp_iter *rvt_qp_iter_init(struct rvt_dev_info *rdi,
1039 void (*cb)(struct rvt_qp *qp, u64 v));
1040 int rvt_qp_iter_next(struct rvt_qp_iter *iter);
1041 void rvt_qp_iter(struct rvt_dev_info *rdi,
1043 void (*cb)(struct rvt_qp *qp, u64 v));
1044 void rvt_qp_mr_clean(struct rvt_qp *qp, u32 lkey);
1045 #endif /* DEF_RDMAVT_INCQP_H */