423 строки
15 KiB
C
423 строки
15 KiB
C
#ifndef DEF_RDMAVT_INCQP_H
|
|
#define DEF_RDMAVT_INCQP_H
|
|
|
|
/*
|
|
* Copyright(c) 2015 Intel Corporation.
|
|
*
|
|
* This file is provided under a dual BSD/GPLv2 license. When using or
|
|
* redistributing this file, you may do so under either license.
|
|
*
|
|
* GPL LICENSE SUMMARY
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* BSD LICENSE
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* - Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* - Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#include <rdma/rdma_vt.h>
|
|
#include <rdma/ib_pack.h>
|
|
/*
|
|
* Atomic bit definitions for r_aflags.
|
|
*/
|
|
#define RVT_R_WRID_VALID 0
|
|
#define RVT_R_REWIND_SGE 1
|
|
|
|
/*
|
|
* Bit definitions for r_flags.
|
|
*/
|
|
#define RVT_R_REUSE_SGE 0x01
|
|
#define RVT_R_RDMAR_SEQ 0x02
|
|
#define RVT_R_RSP_NAK 0x04
|
|
#define RVT_R_RSP_SEND 0x08
|
|
#define RVT_R_COMM_EST 0x10
|
|
|
|
/*
|
|
* Bit definitions for s_flags.
|
|
*
|
|
* RVT_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
|
|
* RVT_S_BUSY - send tasklet is processing the QP
|
|
* RVT_S_TIMER - the RC retry timer is active
|
|
* RVT_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
|
|
* RVT_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
|
|
* before processing the next SWQE
|
|
* RVT_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
|
|
* before processing the next SWQE
|
|
* RVT_S_WAIT_RNR - waiting for RNR timeout
|
|
* RVT_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
|
|
* RVT_S_WAIT_DMA - waiting for send DMA queue to drain before generating
|
|
* next send completion entry not via send DMA
|
|
* RVT_S_WAIT_PIO - waiting for a send buffer to be available
|
|
* RVT_S_WAIT_TX - waiting for a struct verbs_txreq to be available
|
|
* RVT_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
|
|
* RVT_S_WAIT_KMEM - waiting for kernel memory to be available
|
|
* RVT_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
|
|
* RVT_S_WAIT_ACK - waiting for an ACK packet before sending more requests
|
|
* RVT_S_SEND_ONE - send one packet, request ACK, then wait for ACK
|
|
* RVT_S_ECN - a BECN was queued to the send engine
|
|
*/
|
|
#define RVT_S_SIGNAL_REQ_WR 0x0001
|
|
#define RVT_S_BUSY 0x0002
|
|
#define RVT_S_TIMER 0x0004
|
|
#define RVT_S_RESP_PENDING 0x0008
|
|
#define RVT_S_ACK_PENDING 0x0010
|
|
#define RVT_S_WAIT_FENCE 0x0020
|
|
#define RVT_S_WAIT_RDMAR 0x0040
|
|
#define RVT_S_WAIT_RNR 0x0080
|
|
#define RVT_S_WAIT_SSN_CREDIT 0x0100
|
|
#define RVT_S_WAIT_DMA 0x0200
|
|
#define RVT_S_WAIT_PIO 0x0400
|
|
#define RVT_S_WAIT_TX 0x0800
|
|
#define RVT_S_WAIT_DMA_DESC 0x1000
|
|
#define RVT_S_WAIT_KMEM 0x2000
|
|
#define RVT_S_WAIT_PSN 0x4000
|
|
#define RVT_S_WAIT_ACK 0x8000
|
|
#define RVT_S_SEND_ONE 0x10000
|
|
#define RVT_S_UNLIMITED_CREDIT 0x20000
|
|
#define RVT_S_AHG_VALID 0x40000
|
|
#define RVT_S_AHG_CLEAR 0x80000
|
|
#define RVT_S_ECN 0x100000
|
|
|
|
/*
|
|
* Wait flags that would prevent any packet type from being sent.
|
|
*/
|
|
#define RVT_S_ANY_WAIT_IO (RVT_S_WAIT_PIO | RVT_S_WAIT_TX | \
|
|
RVT_S_WAIT_DMA_DESC | RVT_S_WAIT_KMEM)
|
|
|
|
/*
|
|
* Wait flags that would prevent send work requests from making progress.
|
|
*/
|
|
#define RVT_S_ANY_WAIT_SEND (RVT_S_WAIT_FENCE | RVT_S_WAIT_RDMAR | \
|
|
RVT_S_WAIT_RNR | RVT_S_WAIT_SSN_CREDIT | RVT_S_WAIT_DMA | \
|
|
RVT_S_WAIT_PSN | RVT_S_WAIT_ACK)
|
|
|
|
#define RVT_S_ANY_WAIT (RVT_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND)
|
|
|
|
/* Number of bits to pay attention to in the opcode for checking qp type */
|
|
#define RVT_OPCODE_QP_MASK 0xE0
|
|
|
|
/* Flags for checking QP state (see ib_rvt_state_ops[]) */
|
|
#define RVT_POST_SEND_OK 0x01
|
|
#define RVT_POST_RECV_OK 0x02
|
|
#define RVT_PROCESS_RECV_OK 0x04
|
|
#define RVT_PROCESS_SEND_OK 0x08
|
|
#define RVT_PROCESS_NEXT_SEND_OK 0x10
|
|
#define RVT_FLUSH_SEND 0x20
|
|
#define RVT_FLUSH_RECV 0x40
|
|
#define RVT_PROCESS_OR_FLUSH_SEND \
|
|
(RVT_PROCESS_SEND_OK | RVT_FLUSH_SEND)
|
|
|
|
/*
|
|
* Send work request queue entry.
|
|
* The size of the sg_list is determined when the QP is created and stored
|
|
* in qp->s_max_sge.
|
|
*/
|
|
struct rvt_swqe {
|
|
union {
|
|
struct ib_send_wr wr; /* don't use wr.sg_list */
|
|
struct ib_ud_wr ud_wr;
|
|
struct ib_reg_wr reg_wr;
|
|
struct ib_rdma_wr rdma_wr;
|
|
struct ib_atomic_wr atomic_wr;
|
|
};
|
|
u32 psn; /* first packet sequence number */
|
|
u32 lpsn; /* last packet sequence number */
|
|
u32 ssn; /* send sequence number */
|
|
u32 length; /* total length of data in sg_list */
|
|
struct rvt_sge sg_list[0];
|
|
};
|
|
|
|
/*
|
|
* Receive work request queue entry.
|
|
* The size of the sg_list is determined when the QP (or SRQ) is created
|
|
* and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
|
|
*/
|
|
struct rvt_rwqe {
|
|
u64 wr_id;
|
|
u8 num_sge;
|
|
struct ib_sge sg_list[0];
|
|
};
|
|
|
|
/*
|
|
* This structure is used to contain the head pointer, tail pointer,
|
|
* and receive work queue entries as a single memory allocation so
|
|
* it can be mmap'ed into user space.
|
|
* Note that the wq array elements are variable size so you can't
|
|
* just index into the array to get the N'th element;
|
|
* use get_rwqe_ptr() instead.
|
|
*/
|
|
struct rvt_rwq {
|
|
u32 head; /* new work requests posted to the head */
|
|
u32 tail; /* receives pull requests from here. */
|
|
struct rvt_rwqe wq[0];
|
|
};
|
|
|
|
struct rvt_rq {
|
|
struct rvt_rwq *wq;
|
|
u32 size; /* size of RWQE array */
|
|
u8 max_sge;
|
|
/* protect changes in this struct */
|
|
spinlock_t lock ____cacheline_aligned_in_smp;
|
|
};
|
|
|
|
/*
|
|
* This structure is used by rvt_mmap() to validate an offset
|
|
* when an mmap() request is made. The vm_area_struct then uses
|
|
* this as its vm_private_data.
|
|
*/
|
|
struct rvt_mmap_info {
|
|
struct list_head pending_mmaps;
|
|
struct ib_ucontext *context;
|
|
void *obj;
|
|
__u64 offset;
|
|
struct kref ref;
|
|
unsigned size;
|
|
};
|
|
|
|
#define RVT_MAX_RDMA_ATOMIC 16
|
|
|
|
/*
|
|
* This structure holds the information that the send tasklet needs
|
|
* to send a RDMA read response or atomic operation.
|
|
*/
|
|
struct rvt_ack_entry {
|
|
u8 opcode;
|
|
u8 sent;
|
|
u32 psn;
|
|
u32 lpsn;
|
|
union {
|
|
struct rvt_sge rdma_sge;
|
|
u64 atomic_data;
|
|
};
|
|
};
|
|
|
|
/*
|
|
* Variables prefixed with s_ are for the requester (sender).
|
|
* Variables prefixed with r_ are for the responder (receiver).
|
|
* Variables prefixed with ack_ are for responder replies.
|
|
*
|
|
* Common variables are protected by both r_rq.lock and s_lock in that order
|
|
* which only happens in modify_qp() or changing the QP 'state'.
|
|
*/
|
|
struct rvt_qp {
|
|
struct ib_qp ibqp;
|
|
void *priv; /* Driver private data */
|
|
/* read mostly fields above and below */
|
|
struct ib_ah_attr remote_ah_attr;
|
|
struct ib_ah_attr alt_ah_attr;
|
|
struct rvt_qp __rcu *next; /* link list for QPN hash table */
|
|
struct rvt_swqe *s_wq; /* send work queue */
|
|
struct rvt_mmap_info *ip;
|
|
|
|
unsigned long timeout_jiffies; /* computed from timeout */
|
|
|
|
enum ib_mtu path_mtu;
|
|
int srate_mbps; /* s_srate (below) converted to Mbit/s */
|
|
u32 remote_qpn;
|
|
u32 pmtu; /* decoded from path_mtu */
|
|
u32 qkey; /* QKEY for this QP (for UD or RD) */
|
|
u32 s_size; /* send work queue size */
|
|
u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
|
|
u32 s_ahgpsn; /* set to the psn in the copy of the header */
|
|
|
|
u8 state; /* QP state */
|
|
u8 allowed_ops; /* high order bits of allowed opcodes */
|
|
u8 qp_access_flags;
|
|
u8 alt_timeout; /* Alternate path timeout for this QP */
|
|
u8 timeout; /* Timeout for this QP */
|
|
u8 s_srate;
|
|
u8 s_mig_state;
|
|
u8 port_num;
|
|
u8 s_pkey_index; /* PKEY index to use */
|
|
u8 s_alt_pkey_index; /* Alternate path PKEY index to use */
|
|
u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */
|
|
u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */
|
|
u8 s_retry_cnt; /* number of times to retry */
|
|
u8 s_rnr_retry_cnt;
|
|
u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
|
|
u8 s_max_sge; /* size of s_wq->sg_list */
|
|
u8 s_draining;
|
|
|
|
/* start of read/write fields */
|
|
atomic_t refcount ____cacheline_aligned_in_smp;
|
|
wait_queue_head_t wait;
|
|
|
|
struct rvt_ack_entry s_ack_queue[RVT_MAX_RDMA_ATOMIC + 1]
|
|
____cacheline_aligned_in_smp;
|
|
struct rvt_sge_state s_rdma_read_sge;
|
|
|
|
spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
|
|
unsigned long r_aflags;
|
|
u64 r_wr_id; /* ID for current receive WQE */
|
|
u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
|
|
u32 r_len; /* total length of r_sge */
|
|
u32 r_rcv_len; /* receive data len processed */
|
|
u32 r_psn; /* expected rcv packet sequence number */
|
|
u32 r_msn; /* message sequence number */
|
|
|
|
u8 r_state; /* opcode of last packet received */
|
|
u8 r_flags;
|
|
u8 r_head_ack_queue; /* index into s_ack_queue[] */
|
|
|
|
struct list_head rspwait; /* link for waiting to respond */
|
|
|
|
struct rvt_sge_state r_sge; /* current receive data */
|
|
struct rvt_rq r_rq; /* receive work queue */
|
|
|
|
spinlock_t s_lock ____cacheline_aligned_in_smp;
|
|
struct rvt_sge_state *s_cur_sge;
|
|
u32 s_flags;
|
|
struct rvt_swqe *s_wqe;
|
|
struct rvt_sge_state s_sge; /* current send request data */
|
|
struct rvt_mregion *s_rdma_mr;
|
|
struct sdma_engine *s_sde; /* current sde */
|
|
u32 s_cur_size; /* size of send packet in bytes */
|
|
u32 s_len; /* total length of s_sge */
|
|
u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
|
|
u32 s_next_psn; /* PSN for next request */
|
|
u32 s_last_psn; /* last response PSN processed */
|
|
u32 s_sending_psn; /* lowest PSN that is being sent */
|
|
u32 s_sending_hpsn; /* highest PSN that is being sent */
|
|
u32 s_psn; /* current packet sequence number */
|
|
u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */
|
|
u32 s_ack_psn; /* PSN for acking sends and RDMA writes */
|
|
u32 s_head; /* new entries added here */
|
|
u32 s_tail; /* next entry to process */
|
|
u32 s_cur; /* current work queue entry */
|
|
u32 s_acked; /* last un-ACK'ed entry */
|
|
u32 s_last; /* last completed entry */
|
|
u32 s_ssn; /* SSN of tail entry */
|
|
u32 s_lsn; /* limit sequence number (credit) */
|
|
u16 s_hdrwords; /* size of s_hdr in 32 bit words */
|
|
u16 s_rdma_ack_cnt;
|
|
s8 s_ahgidx;
|
|
u8 s_state; /* opcode of last packet sent */
|
|
u8 s_ack_state; /* opcode of packet to ACK */
|
|
u8 s_nak_state; /* non-zero if NAK is pending */
|
|
u8 r_nak_state; /* non-zero if NAK is pending */
|
|
u8 s_retry; /* requester retry counter */
|
|
u8 s_rnr_retry; /* requester RNR retry counter */
|
|
u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */
|
|
u8 s_tail_ack_queue; /* index into s_ack_queue[] */
|
|
|
|
struct rvt_sge_state s_ack_rdma_sge;
|
|
struct timer_list s_timer;
|
|
|
|
/*
|
|
* This sge list MUST be last. Do not add anything below here.
|
|
*/
|
|
struct rvt_sge r_sg_list[0] /* verified SGEs */
|
|
____cacheline_aligned_in_smp;
|
|
};
|
|
|
|
struct rvt_srq {
|
|
struct ib_srq ibsrq;
|
|
struct rvt_rq rq;
|
|
struct rvt_mmap_info *ip;
|
|
/* send signal when number of RWQEs < limit */
|
|
u32 limit;
|
|
};
|
|
|
|
#define RVT_QPN_MAX BIT(24)
|
|
#define RVT_QPNMAP_ENTRIES (RVT_QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
|
|
#define RVT_BITS_PER_PAGE (PAGE_SIZE * BITS_PER_BYTE)
|
|
#define RVT_BITS_PER_PAGE_MASK (RVT_BITS_PER_PAGE - 1)
|
|
#define RVT_QPN_MASK 0xFFFFFF
|
|
|
|
/*
|
|
* QPN-map pages start out as NULL, they get allocated upon
|
|
* first use and are never deallocated. This way,
|
|
* large bitmaps are not allocated unless large numbers of QPs are used.
|
|
*/
|
|
struct rvt_qpn_map {
|
|
void *page;
|
|
};
|
|
|
|
struct rvt_qpn_table {
|
|
spinlock_t lock; /* protect changes to the qp table */
|
|
unsigned flags; /* flags for QP0/1 allocated for each port */
|
|
u32 last; /* last QP number allocated */
|
|
u32 nmaps; /* size of the map table */
|
|
u16 limit;
|
|
u8 incr;
|
|
/* bit map of free QP numbers other than 0/1 */
|
|
struct rvt_qpn_map map[RVT_QPNMAP_ENTRIES];
|
|
};
|
|
|
|
struct rvt_qp_ibdev {
|
|
u32 qp_table_size;
|
|
u32 qp_table_bits;
|
|
struct rvt_qp __rcu **qp_table;
|
|
spinlock_t qpt_lock; /* qptable lock */
|
|
struct rvt_qpn_table qpn_table;
|
|
};
|
|
|
|
/*
|
|
* Since struct rvt_swqe is not a fixed size, we can't simply index into
|
|
* struct hfi1_qp.s_wq. This function does the array index computation.
|
|
*/
|
|
static inline struct rvt_swqe *rvt_get_swqe_ptr(struct rvt_qp *qp,
|
|
unsigned n)
|
|
{
|
|
return (struct rvt_swqe *)((char *)qp->s_wq +
|
|
(sizeof(struct rvt_swqe) +
|
|
qp->s_max_sge *
|
|
sizeof(struct rvt_sge)) * n);
|
|
}
|
|
|
|
/*
|
|
* Since struct rvt_rwqe is not a fixed size, we can't simply index into
|
|
* struct rvt_rwq.wq. This function does the array index computation.
|
|
*/
|
|
static inline struct rvt_rwqe *rvt_get_rwqe_ptr(struct rvt_rq *rq, unsigned n)
|
|
{
|
|
return (struct rvt_rwqe *)
|
|
((char *)rq->wq->wq +
|
|
(sizeof(struct rvt_rwqe) +
|
|
rq->max_sge * sizeof(struct ib_sge)) * n);
|
|
}
|
|
|
|
extern const int ib_rvt_state_ops[];
|
|
|
|
struct rvt_dev_info;
|
|
void rvt_remove_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp);
|
|
void rvt_clear_mr_refs(struct rvt_qp *qp, int clr_sends);
|
|
int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err);
|
|
void rvt_free_qpn(struct rvt_qpn_table *qpt, u32 qpn);
|
|
void rvt_dec_qp_cnt(struct rvt_dev_info *rdi);
|
|
|
|
#endif /* DEF_RDMAVT_INCQP_H */
|