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linux/drivers/infiniband/hw/qib/qib_verbs.h
Mike Marciniszyn 8aac4cc3a9 IB/qib: RCU locking for MR validation 
Profiling indicates that MR validation locking is expensive.  The MR
table is largely read-only and is a suitable candidate for RCU locking.

The patch uses RCU locking during validation to eliminate one
lock/unlock during that validation.

Reviewed-by: Mike Heinz <michael.william.heinz@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2012-07-08 18:05:19 -07:00

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/*
* Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
* All rights reserved.
* Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef QIB_VERBS_H
#define QIB_VERBS_H
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/kref.h>
#include <linux/workqueue.h>
#include <linux/completion.h>
#include <rdma/ib_pack.h>
#include <rdma/ib_user_verbs.h>
struct qib_ctxtdata;
struct qib_pportdata;
struct qib_devdata;
struct qib_verbs_txreq;
#define QIB_MAX_RDMA_ATOMIC 16
#define QIB_GUIDS_PER_PORT 5
#define QPN_MAX (1 << 24)
#define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
/*
* Increment this value if any changes that break userspace ABI
* compatibility are made.
*/
#define QIB_UVERBS_ABI_VERSION 2
/*
* Define an ib_cq_notify value that is not valid so we know when CQ
* notifications are armed.
*/
#define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
#define IB_SEQ_NAK (3 << 29)
/* AETH NAK opcode values */
#define IB_RNR_NAK 0x20
#define IB_NAK_PSN_ERROR 0x60
#define IB_NAK_INVALID_REQUEST 0x61
#define IB_NAK_REMOTE_ACCESS_ERROR 0x62
#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
#define IB_NAK_INVALID_RD_REQUEST 0x64
/* Flags for checking QP state (see ib_qib_state_ops[]) */
#define QIB_POST_SEND_OK 0x01
#define QIB_POST_RECV_OK 0x02
#define QIB_PROCESS_RECV_OK 0x04
#define QIB_PROCESS_SEND_OK 0x08
#define QIB_PROCESS_NEXT_SEND_OK 0x10
#define QIB_FLUSH_SEND 0x20
#define QIB_FLUSH_RECV 0x40
#define QIB_PROCESS_OR_FLUSH_SEND \
(QIB_PROCESS_SEND_OK | QIB_FLUSH_SEND)
/* IB Performance Manager status values */
#define IB_PMA_SAMPLE_STATUS_DONE 0x00
#define IB_PMA_SAMPLE_STATUS_STARTED 0x01
#define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
/* Mandatory IB performance counter select values. */
#define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
#define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
#define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
#define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
#define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
#define QIB_VENDOR_IPG cpu_to_be16(0xFFA0)
#define IB_BTH_REQ_ACK (1 << 31)
#define IB_BTH_SOLICITED (1 << 23)
#define IB_BTH_MIG_REQ (1 << 22)
/* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */
#define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26)
#define IB_GRH_VERSION 6
#define IB_GRH_VERSION_MASK 0xF
#define IB_GRH_VERSION_SHIFT 28
#define IB_GRH_TCLASS_MASK 0xFF
#define IB_GRH_TCLASS_SHIFT 20
#define IB_GRH_FLOW_MASK 0xFFFFF
#define IB_GRH_FLOW_SHIFT 0
#define IB_GRH_NEXT_HDR 0x1B
#define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
/* Values for set/get portinfo VLCap OperationalVLs */
#define IB_VL_VL0 1
#define IB_VL_VL0_1 2
#define IB_VL_VL0_3 3
#define IB_VL_VL0_7 4
#define IB_VL_VL0_14 5
static inline int qib_num_vls(int vls)
{
switch (vls) {
default:
case IB_VL_VL0:
return 1;
case IB_VL_VL0_1:
return 2;
case IB_VL_VL0_3:
return 4;
case IB_VL_VL0_7:
return 8;
case IB_VL_VL0_14:
return 15;
}
}
struct ib_reth {
__be64 vaddr;
__be32 rkey;
__be32 length;
} __attribute__ ((packed));
struct ib_atomic_eth {
__be32 vaddr[2]; /* unaligned so access as 2 32-bit words */
__be32 rkey;
__be64 swap_data;
__be64 compare_data;
} __attribute__ ((packed));
struct qib_other_headers {
__be32 bth[3];
union {
struct {
__be32 deth[2];
__be32 imm_data;
} ud;
struct {
struct ib_reth reth;
__be32 imm_data;
} rc;
struct {
__be32 aeth;
__be32 atomic_ack_eth[2];
} at;
__be32 imm_data;
__be32 aeth;
struct ib_atomic_eth atomic_eth;
} u;
} __attribute__ ((packed));
/*
* Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
* long (72 w/ imm_data). Only the first 56 bytes of the IB header
* will be in the eager header buffer. The remaining 12 or 16 bytes
* are in the data buffer.
*/
struct qib_ib_header {
__be16 lrh[4];
union {
struct {
struct ib_grh grh;
struct qib_other_headers oth;
} l;
struct qib_other_headers oth;
} u;
} __attribute__ ((packed));
struct qib_pio_header {
__le32 pbc[2];
struct qib_ib_header hdr;
} __attribute__ ((packed));
/*
* There is one struct qib_mcast for each multicast GID.
* All attached QPs are then stored as a list of
* struct qib_mcast_qp.
*/
struct qib_mcast_qp {
struct list_head list;
struct qib_qp *qp;
};
struct qib_mcast {
struct rb_node rb_node;
union ib_gid mgid;
struct list_head qp_list;
wait_queue_head_t wait;
atomic_t refcount;
int n_attached;
};
/* Protection domain */
struct qib_pd {
struct ib_pd ibpd;
int user; /* non-zero if created from user space */
};
/* Address Handle */
struct qib_ah {
struct ib_ah ibah;
struct ib_ah_attr attr;
atomic_t refcount;
};
/*
* This structure is used by qib_mmap() to validate an offset
* when an mmap() request is made. The vm_area_struct then uses
* this as its vm_private_data.
*/
struct qib_mmap_info {
struct list_head pending_mmaps;
struct ib_ucontext *context;
void *obj;
__u64 offset;
struct kref ref;
unsigned size;
};
/*
* This structure is used to contain the head pointer, tail pointer,
* and completion queue entries as a single memory allocation so
* it can be mmap'ed into user space.
*/
struct qib_cq_wc {
u32 head; /* index of next entry to fill */
u32 tail; /* index of next ib_poll_cq() entry */
union {
/* these are actually size ibcq.cqe + 1 */
struct ib_uverbs_wc uqueue[0];
struct ib_wc kqueue[0];
};
};
/*
* The completion queue structure.
*/
struct qib_cq {
struct ib_cq ibcq;
struct work_struct comptask;
spinlock_t lock; /* protect changes in this struct */
u8 notify;
u8 triggered;
struct qib_cq_wc *queue;
struct qib_mmap_info *ip;
};
/*
* A segment is a linear region of low physical memory.
* XXX Maybe we should use phys addr here and kmap()/kunmap().
* Used by the verbs layer.
*/
struct qib_seg {
void *vaddr;
size_t length;
};
/* The number of qib_segs that fit in a page. */
#define QIB_SEGSZ (PAGE_SIZE / sizeof(struct qib_seg))
struct qib_segarray {
struct qib_seg segs[QIB_SEGSZ];
};
struct qib_mregion {
struct ib_pd *pd; /* shares refcnt of ibmr.pd */
u64 user_base; /* User's address for this region */
u64 iova; /* IB start address of this region */
size_t length;
u32 lkey;
u32 offset; /* offset (bytes) to start of region */
int access_flags;
u32 max_segs; /* number of qib_segs in all the arrays */
u32 mapsz; /* size of the map array */
u8 page_shift; /* 0 - non unform/non powerof2 sizes */
u8 lkey_published; /* in global table */
struct completion comp; /* complete when refcount goes to zero */
struct rcu_head list;
atomic_t refcount;
struct qib_segarray *map[0]; /* the segments */
};
/*
* These keep track of the copy progress within a memory region.
* Used by the verbs layer.
*/
struct qib_sge {
struct qib_mregion *mr;
void *vaddr; /* kernel virtual address of segment */
u32 sge_length; /* length of the SGE */
u32 length; /* remaining length of the segment */
u16 m; /* current index: mr->map[m] */
u16 n; /* current index: mr->map[m]->segs[n] */
};
/* Memory region */
struct qib_mr {
struct ib_mr ibmr;
struct ib_umem *umem;
struct qib_mregion mr; /* must be last */
};
/*
* 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 qib_swqe {
struct ib_send_wr wr; /* don't use wr.sg_list */
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 qib_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 qib_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 qib_rwq {
u32 head; /* new work requests posted to the head */
u32 tail; /* receives pull requests from here. */
struct qib_rwqe wq[0];
};
struct qib_rq {
struct qib_rwq *wq;
u32 size; /* size of RWQE array */
u8 max_sge;
spinlock_t lock /* protect changes in this struct */
____cacheline_aligned_in_smp;
};
struct qib_srq {
struct ib_srq ibsrq;
struct qib_rq rq;
struct qib_mmap_info *ip;
/* send signal when number of RWQEs < limit */
u32 limit;
};
struct qib_sge_state {
struct qib_sge *sg_list; /* next SGE to be used if any */
struct qib_sge sge; /* progress state for the current SGE */
u32 total_len;
u8 num_sge;
};
/*
* This structure holds the information that the send tasklet needs
* to send a RDMA read response or atomic operation.
*/
struct qib_ack_entry {
u8 opcode;
u8 sent;
u32 psn;
u32 lpsn;
union {
struct qib_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 qib_qp {
struct ib_qp ibqp;
/* read mostly fields above and below */
struct ib_ah_attr remote_ah_attr;
struct ib_ah_attr alt_ah_attr;
struct qib_qp *next; /* link list for QPN hash table */
struct qib_swqe *s_wq; /* send work queue */
struct qib_mmap_info *ip;
struct qib_ib_header *s_hdr; /* next packet header to send */
unsigned long timeout_jiffies; /* computed from timeout */
enum ib_mtu path_mtu;
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 */
u8 state; /* QP state */
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 qib_ack_entry s_ack_queue[QIB_MAX_RDMA_ATOMIC + 1]
____cacheline_aligned_in_smp;
struct qib_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 waititing to respond */
struct qib_sge_state r_sge; /* current receive data */
struct qib_rq r_rq; /* receive work queue */
spinlock_t s_lock ____cacheline_aligned_in_smp;
struct qib_sge_state *s_cur_sge;
u32 s_flags;
struct qib_verbs_txreq *s_tx;
struct qib_swqe *s_wqe;
struct qib_sge_state s_sge; /* current send request data */
struct qib_mregion *s_rdma_mr;
atomic_t s_dma_busy;
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;
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 qib_sge_state s_ack_rdma_sge;
struct timer_list s_timer;
struct list_head iowait; /* link for wait PIO buf */
struct work_struct s_work;
wait_queue_head_t wait_dma;
struct qib_sge r_sg_list[0] /* verified SGEs */
____cacheline_aligned_in_smp;
};
/*
* Atomic bit definitions for r_aflags.
*/
#define QIB_R_WRID_VALID 0
#define QIB_R_REWIND_SGE 1
/*
* Bit definitions for r_flags.
*/
#define QIB_R_REUSE_SGE 0x01
#define QIB_R_RDMAR_SEQ 0x02
#define QIB_R_RSP_NAK 0x04
#define QIB_R_RSP_SEND 0x08
#define QIB_R_COMM_EST 0x10
/*
* Bit definitions for s_flags.
*
* QIB_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
* QIB_S_BUSY - send tasklet is processing the QP
* QIB_S_TIMER - the RC retry timer is active
* QIB_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
* QIB_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
* before processing the next SWQE
* QIB_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
* before processing the next SWQE
* QIB_S_WAIT_RNR - waiting for RNR timeout
* QIB_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
* QIB_S_WAIT_DMA - waiting for send DMA queue to drain before generating
* next send completion entry not via send DMA
* QIB_S_WAIT_PIO - waiting for a send buffer to be available
* QIB_S_WAIT_TX - waiting for a struct qib_verbs_txreq to be available
* QIB_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
* QIB_S_WAIT_KMEM - waiting for kernel memory to be available
* QIB_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
* QIB_S_WAIT_ACK - waiting for an ACK packet before sending more requests
* QIB_S_SEND_ONE - send one packet, request ACK, then wait for ACK
*/
#define QIB_S_SIGNAL_REQ_WR 0x0001
#define QIB_S_BUSY 0x0002
#define QIB_S_TIMER 0x0004
#define QIB_S_RESP_PENDING 0x0008
#define QIB_S_ACK_PENDING 0x0010
#define QIB_S_WAIT_FENCE 0x0020
#define QIB_S_WAIT_RDMAR 0x0040
#define QIB_S_WAIT_RNR 0x0080
#define QIB_S_WAIT_SSN_CREDIT 0x0100
#define QIB_S_WAIT_DMA 0x0200
#define QIB_S_WAIT_PIO 0x0400
#define QIB_S_WAIT_TX 0x0800
#define QIB_S_WAIT_DMA_DESC 0x1000
#define QIB_S_WAIT_KMEM 0x2000
#define QIB_S_WAIT_PSN 0x4000
#define QIB_S_WAIT_ACK 0x8000
#define QIB_S_SEND_ONE 0x10000
#define QIB_S_UNLIMITED_CREDIT 0x20000
/*
* Wait flags that would prevent any packet type from being sent.
*/
#define QIB_S_ANY_WAIT_IO (QIB_S_WAIT_PIO | QIB_S_WAIT_TX | \
QIB_S_WAIT_DMA_DESC | QIB_S_WAIT_KMEM)
/*
* Wait flags that would prevent send work requests from making progress.
*/
#define QIB_S_ANY_WAIT_SEND (QIB_S_WAIT_FENCE | QIB_S_WAIT_RDMAR | \
QIB_S_WAIT_RNR | QIB_S_WAIT_SSN_CREDIT | QIB_S_WAIT_DMA | \
QIB_S_WAIT_PSN | QIB_S_WAIT_ACK)
#define QIB_S_ANY_WAIT (QIB_S_ANY_WAIT_IO | QIB_S_ANY_WAIT_SEND)
#define QIB_PSN_CREDIT 16
/*
* Since struct qib_swqe is not a fixed size, we can't simply index into
* struct qib_qp.s_wq. This function does the array index computation.
*/
static inline struct qib_swqe *get_swqe_ptr(struct qib_qp *qp,
unsigned n)
{
return (struct qib_swqe *)((char *)qp->s_wq +
(sizeof(struct qib_swqe) +
qp->s_max_sge *
sizeof(struct qib_sge)) * n);
}
/*
* Since struct qib_rwqe is not a fixed size, we can't simply index into
* struct qib_rwq.wq. This function does the array index computation.
*/
static inline struct qib_rwqe *get_rwqe_ptr(struct qib_rq *rq, unsigned n)
{
return (struct qib_rwqe *)
((char *) rq->wq->wq +
(sizeof(struct qib_rwqe) +
rq->max_sge * sizeof(struct ib_sge)) * n);
}
/*
* 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 qpn_map {
void *page;
};
struct qib_qpn_table {
spinlock_t lock; /* protect changes in this struct */
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;
u16 mask;
/* bit map of free QP numbers other than 0/1 */
struct qpn_map map[QPNMAP_ENTRIES];
};
struct qib_lkey_table {
spinlock_t lock; /* protect changes in this struct */
u32 next; /* next unused index (speeds search) */
u32 gen; /* generation count */
u32 max; /* size of the table */
struct qib_mregion **table;
};
struct qib_opcode_stats {
u64 n_packets; /* number of packets */
u64 n_bytes; /* total number of bytes */
};
struct qib_ibport {
struct qib_qp *qp0;
struct qib_qp *qp1;
struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
struct qib_ah *sm_ah;
struct qib_ah *smi_ah;
struct rb_root mcast_tree;
spinlock_t lock; /* protect changes in this struct */
/* non-zero when timer is set */
unsigned long mkey_lease_timeout;
unsigned long trap_timeout;
__be64 gid_prefix; /* in network order */
__be64 mkey;
__be64 guids[QIB_GUIDS_PER_PORT - 1]; /* writable GUIDs */
u64 tid; /* TID for traps */
u64 n_unicast_xmit; /* total unicast packets sent */
u64 n_unicast_rcv; /* total unicast packets received */
u64 n_multicast_xmit; /* total multicast packets sent */
u64 n_multicast_rcv; /* total multicast packets received */
u64 z_symbol_error_counter; /* starting count for PMA */
u64 z_link_error_recovery_counter; /* starting count for PMA */
u64 z_link_downed_counter; /* starting count for PMA */
u64 z_port_rcv_errors; /* starting count for PMA */
u64 z_port_rcv_remphys_errors; /* starting count for PMA */
u64 z_port_xmit_discards; /* starting count for PMA */
u64 z_port_xmit_data; /* starting count for PMA */
u64 z_port_rcv_data; /* starting count for PMA */
u64 z_port_xmit_packets; /* starting count for PMA */
u64 z_port_rcv_packets; /* starting count for PMA */
u32 z_local_link_integrity_errors; /* starting count for PMA */
u32 z_excessive_buffer_overrun_errors; /* starting count for PMA */
u32 z_vl15_dropped; /* starting count for PMA */
u32 n_rc_resends;
u32 n_rc_acks;
u32 n_rc_qacks;
u32 n_rc_delayed_comp;
u32 n_seq_naks;
u32 n_rdma_seq;
u32 n_rnr_naks;
u32 n_other_naks;
u32 n_loop_pkts;
u32 n_pkt_drops;
u32 n_vl15_dropped;
u32 n_rc_timeouts;
u32 n_dmawait;
u32 n_unaligned;
u32 n_rc_dupreq;
u32 n_rc_seqnak;
u32 port_cap_flags;
u32 pma_sample_start;
u32 pma_sample_interval;
__be16 pma_counter_select[5];
u16 pma_tag;
u16 pkey_violations;
u16 qkey_violations;
u16 mkey_violations;
u16 mkey_lease_period;
u16 sm_lid;
u16 repress_traps;
u8 sm_sl;
u8 mkeyprot;
u8 subnet_timeout;
u8 vl_high_limit;
u8 sl_to_vl[16];
struct qib_opcode_stats opstats[128];
};
struct qib_ibdev {
struct ib_device ibdev;
struct list_head pending_mmaps;
spinlock_t mmap_offset_lock; /* protect mmap_offset */
u32 mmap_offset;
struct qib_mregion *dma_mr;
/* QP numbers are shared by all IB ports */
struct qib_qpn_table qpn_table;
struct qib_lkey_table lk_table;
struct list_head piowait; /* list for wait PIO buf */
struct list_head dmawait; /* list for wait DMA */
struct list_head txwait; /* list for wait qib_verbs_txreq */
struct list_head memwait; /* list for wait kernel memory */
struct list_head txreq_free;
struct timer_list mem_timer;
struct qib_qp **qp_table;
struct qib_pio_header *pio_hdrs;
dma_addr_t pio_hdrs_phys;
/* list of QPs waiting for RNR timer */
spinlock_t pending_lock; /* protect wait lists, PMA counters, etc. */
u32 qp_table_size; /* size of the hash table */
u32 qp_rnd; /* random bytes for hash */
spinlock_t qpt_lock;
u32 n_piowait;
u32 n_txwait;
u32 n_pds_allocated; /* number of PDs allocated for device */
spinlock_t n_pds_lock;
u32 n_ahs_allocated; /* number of AHs allocated for device */
spinlock_t n_ahs_lock;
u32 n_cqs_allocated; /* number of CQs allocated for device */
spinlock_t n_cqs_lock;
u32 n_qps_allocated; /* number of QPs allocated for device */
spinlock_t n_qps_lock;
u32 n_srqs_allocated; /* number of SRQs allocated for device */
spinlock_t n_srqs_lock;
u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
spinlock_t n_mcast_grps_lock;
};
struct qib_verbs_counters {
u64 symbol_error_counter;
u64 link_error_recovery_counter;
u64 link_downed_counter;
u64 port_rcv_errors;
u64 port_rcv_remphys_errors;
u64 port_xmit_discards;
u64 port_xmit_data;
u64 port_rcv_data;
u64 port_xmit_packets;
u64 port_rcv_packets;
u32 local_link_integrity_errors;
u32 excessive_buffer_overrun_errors;
u32 vl15_dropped;
};
static inline struct qib_mr *to_imr(struct ib_mr *ibmr)
{
return container_of(ibmr, struct qib_mr, ibmr);
}
static inline struct qib_pd *to_ipd(struct ib_pd *ibpd)
{
return container_of(ibpd, struct qib_pd, ibpd);
}
static inline struct qib_ah *to_iah(struct ib_ah *ibah)
{
return container_of(ibah, struct qib_ah, ibah);
}
static inline struct qib_cq *to_icq(struct ib_cq *ibcq)
{
return container_of(ibcq, struct qib_cq, ibcq);
}
static inline struct qib_srq *to_isrq(struct ib_srq *ibsrq)
{
return container_of(ibsrq, struct qib_srq, ibsrq);
}
static inline struct qib_qp *to_iqp(struct ib_qp *ibqp)
{
return container_of(ibqp, struct qib_qp, ibqp);
}
static inline struct qib_ibdev *to_idev(struct ib_device *ibdev)
{
return container_of(ibdev, struct qib_ibdev, ibdev);
}
/*
* Send if not busy or waiting for I/O and either
* a RC response is pending or we can process send work requests.
*/
static inline int qib_send_ok(struct qib_qp *qp)
{
return !(qp->s_flags & (QIB_S_BUSY | QIB_S_ANY_WAIT_IO)) &&
(qp->s_hdrwords || (qp->s_flags & QIB_S_RESP_PENDING) ||
!(qp->s_flags & QIB_S_ANY_WAIT_SEND));
}
extern struct workqueue_struct *qib_cq_wq;
/*
* This must be called with s_lock held.
*/
static inline void qib_schedule_send(struct qib_qp *qp)
{
if (qib_send_ok(qp))
queue_work(ib_wq, &qp->s_work);
}
static inline int qib_pkey_ok(u16 pkey1, u16 pkey2)
{
u16 p1 = pkey1 & 0x7FFF;
u16 p2 = pkey2 & 0x7FFF;
/*
* Low 15 bits must be non-zero and match, and
* one of the two must be a full member.
*/
return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0);
}
void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
u32 qp1, u32 qp2, __be16 lid1, __be16 lid2);
void qib_cap_mask_chg(struct qib_ibport *ibp);
void qib_sys_guid_chg(struct qib_ibport *ibp);
void qib_node_desc_chg(struct qib_ibport *ibp);
int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
struct ib_wc *in_wc, struct ib_grh *in_grh,
struct ib_mad *in_mad, struct ib_mad *out_mad);
int qib_create_agents(struct qib_ibdev *dev);
void qib_free_agents(struct qib_ibdev *dev);
/*
* Compare the lower 24 bits of the two values.
* Returns an integer <, ==, or > than zero.
*/
static inline int qib_cmp24(u32 a, u32 b)
{
return (((int) a) - ((int) b)) << 8;
}
struct qib_mcast *qib_mcast_find(struct qib_ibport *ibp, union ib_gid *mgid);
int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords,
u64 *rwords, u64 *spkts, u64 *rpkts,
u64 *xmit_wait);
int qib_get_counters(struct qib_pportdata *ppd,
struct qib_verbs_counters *cntrs);
int qib_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
int qib_mcast_tree_empty(struct qib_ibport *ibp);
__be32 qib_compute_aeth(struct qib_qp *qp);
struct qib_qp *qib_lookup_qpn(struct qib_ibport *ibp, u32 qpn);
struct ib_qp *qib_create_qp(struct ib_pd *ibpd,
struct ib_qp_init_attr *init_attr,
struct ib_udata *udata);
int qib_destroy_qp(struct ib_qp *ibqp);
int qib_error_qp(struct qib_qp *qp, enum ib_wc_status err);
int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata);
int qib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_qp_init_attr *init_attr);
unsigned qib_free_all_qps(struct qib_devdata *dd);
void qib_init_qpn_table(struct qib_devdata *dd, struct qib_qpn_table *qpt);
void qib_free_qpn_table(struct qib_qpn_table *qpt);
void qib_get_credit(struct qib_qp *qp, u32 aeth);
unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult);
void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail);
void qib_put_txreq(struct qib_verbs_txreq *tx);
int qib_verbs_send(struct qib_qp *qp, struct qib_ib_header *hdr,
u32 hdrwords, struct qib_sge_state *ss, u32 len);
void qib_copy_sge(struct qib_sge_state *ss, void *data, u32 length,
int release);
void qib_skip_sge(struct qib_sge_state *ss, u32 length, int release);
void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
int has_grh, void *data, u32 tlen, struct qib_qp *qp);
void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr,
int has_grh, void *data, u32 tlen, struct qib_qp *qp);
int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
void qib_rc_rnr_retry(unsigned long arg);
void qib_rc_send_complete(struct qib_qp *qp, struct qib_ib_header *hdr);
void qib_rc_error(struct qib_qp *qp, enum ib_wc_status err);
int qib_post_ud_send(struct qib_qp *qp, struct ib_send_wr *wr);
void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
int has_grh, void *data, u32 tlen, struct qib_qp *qp);
int qib_alloc_lkey(struct qib_mregion *mr, int dma_region);
void qib_free_lkey(struct qib_mregion *mr);
int qib_lkey_ok(struct qib_lkey_table *rkt, struct qib_pd *pd,
struct qib_sge *isge, struct ib_sge *sge, int acc);
int qib_rkey_ok(struct qib_qp *qp, struct qib_sge *sge,
u32 len, u64 vaddr, u32 rkey, int acc);
int qib_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr);
struct ib_srq *qib_create_srq(struct ib_pd *ibpd,
struct ib_srq_init_attr *srq_init_attr,
struct ib_udata *udata);
int qib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
enum ib_srq_attr_mask attr_mask,
struct ib_udata *udata);
int qib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
int qib_destroy_srq(struct ib_srq *ibsrq);
void qib_cq_enter(struct qib_cq *cq, struct ib_wc *entry, int sig);
int qib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
struct ib_cq *qib_create_cq(struct ib_device *ibdev, int entries,
int comp_vector, struct ib_ucontext *context,
struct ib_udata *udata);
int qib_destroy_cq(struct ib_cq *ibcq);
int qib_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags);
int qib_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
struct ib_mr *qib_get_dma_mr(struct ib_pd *pd, int acc);
struct ib_mr *qib_reg_phys_mr(struct ib_pd *pd,
struct ib_phys_buf *buffer_list,
int num_phys_buf, int acc, u64 *iova_start);
struct ib_mr *qib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt_addr, int mr_access_flags,
struct ib_udata *udata);
int qib_dereg_mr(struct ib_mr *ibmr);
struct ib_mr *qib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len);
struct ib_fast_reg_page_list *qib_alloc_fast_reg_page_list(
struct ib_device *ibdev, int page_list_len);
void qib_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl);
int qib_fast_reg_mr(struct qib_qp *qp, struct ib_send_wr *wr);
struct ib_fmr *qib_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
struct ib_fmr_attr *fmr_attr);
int qib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
int list_len, u64 iova);
int qib_unmap_fmr(struct list_head *fmr_list);
int qib_dealloc_fmr(struct ib_fmr *ibfmr);
static inline void qib_get_mr(struct qib_mregion *mr)
{
atomic_inc(&mr->refcount);
}
void mr_rcu_callback(struct rcu_head *list);
static inline void qib_put_mr(struct qib_mregion *mr)
{
if (unlikely(atomic_dec_and_test(&mr->refcount)))
call_rcu(&mr->list, mr_rcu_callback);
}
static inline void qib_put_ss(struct qib_sge_state *ss)
{
while (ss->num_sge) {
qib_put_mr(ss->sge.mr);
if (--ss->num_sge)
ss->sge = *ss->sg_list++;
}
}
void qib_release_mmap_info(struct kref *ref);
struct qib_mmap_info *qib_create_mmap_info(struct qib_ibdev *dev, u32 size,
struct ib_ucontext *context,
void *obj);
void qib_update_mmap_info(struct qib_ibdev *dev, struct qib_mmap_info *ip,
u32 size, void *obj);
int qib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
int qib_get_rwqe(struct qib_qp *qp, int wr_id_only);
void qib_migrate_qp(struct qib_qp *qp);
int qib_ruc_check_hdr(struct qib_ibport *ibp, struct qib_ib_header *hdr,
int has_grh, struct qib_qp *qp, u32 bth0);
u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr,
struct ib_global_route *grh, u32 hwords, u32 nwords);
void qib_make_ruc_header(struct qib_qp *qp, struct qib_other_headers *ohdr,
u32 bth0, u32 bth2);
void qib_do_send(struct work_struct *work);
void qib_send_complete(struct qib_qp *qp, struct qib_swqe *wqe,
enum ib_wc_status status);
void qib_send_rc_ack(struct qib_qp *qp);
int qib_make_rc_req(struct qib_qp *qp);
int qib_make_uc_req(struct qib_qp *qp);
int qib_make_ud_req(struct qib_qp *qp);
int qib_register_ib_device(struct qib_devdata *);
void qib_unregister_ib_device(struct qib_devdata *);
void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32);
void qib_ib_piobufavail(struct qib_devdata *);
unsigned qib_get_npkeys(struct qib_devdata *);
unsigned qib_get_pkey(struct qib_ibport *, unsigned);
extern const enum ib_wc_opcode ib_qib_wc_opcode[];
/*
* Below HCA-independent IB PhysPortState values, returned
* by the f_ibphys_portstate() routine.
*/
#define IB_PHYSPORTSTATE_SLEEP 1
#define IB_PHYSPORTSTATE_POLL 2
#define IB_PHYSPORTSTATE_DISABLED 3
#define IB_PHYSPORTSTATE_CFG_TRAIN 4
#define IB_PHYSPORTSTATE_LINKUP 5
#define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6
#define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8
#define IB_PHYSPORTSTATE_CFG_IDLE 0xB
#define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC
#define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE
#define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF
#define IB_PHYSPORTSTATE_CFG_ENH 0x10
#define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13
extern const int ib_qib_state_ops[];
extern __be64 ib_qib_sys_image_guid; /* in network order */
extern unsigned int ib_qib_lkey_table_size;
extern unsigned int ib_qib_max_cqes;
extern unsigned int ib_qib_max_cqs;
extern unsigned int ib_qib_max_qp_wrs;
extern unsigned int ib_qib_max_qps;
extern unsigned int ib_qib_max_sges;
extern unsigned int ib_qib_max_mcast_grps;
extern unsigned int ib_qib_max_mcast_qp_attached;
extern unsigned int ib_qib_max_srqs;
extern unsigned int ib_qib_max_srq_sges;
extern unsigned int ib_qib_max_srq_wrs;
extern const u32 ib_qib_rnr_table[];
extern struct ib_dma_mapping_ops qib_dma_mapping_ops;
#endif /* QIB_VERBS_H */
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