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IB/qib, staging/rdma/hfi1: add s_hlock for use in post send

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This patch adds an additional lock to reduce contention on the s_lock.

This lock is used in post_send() so that the post_send is not
serialized with the send engine and other send related processing.

To do this the s_next_psn is now maintained on post_send() while
post_send() related fields are moved to a new cache line.  There is
an s_avail maintained for the post_send() to mitigate trading cache
lines with the send engine.  The lock is released/acquired around
releasing the just built packet to the egress mechanism.

Reviewed-by: Jubin John <jubin.john@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Mike Marciniszyn 2016-02-14 12:10:04 -08:00 committed by Doug Ledford
parent 20f333b613
commit 46a80d62e6
18 changed files with 320 additions and 222 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/infiniband/hw/qib/qib_qp.c
View File

@ -474,6 +474,42 @@ void qib_get_credit(struct rvt_qp *qp, u32 aeth)
}
}
/**
* qib_check_send_wqe - validate wr/wqe
* @qp - The qp
* @wqe - The built wqe
*
* validate wr/wqe. This is called
* prior to inserting the wqe into
* the ring but after the wqe has been
* setup.
*
* Returns 0 on success, -EINVAL on failure
*/
int qib_check_send_wqe(struct rvt_qp *qp,
struct rvt_swqe *wqe)
{
struct rvt_ah *ah;
switch (qp->ibqp.qp_type) {
case IB_QPT_RC:
case IB_QPT_UC:
if (wqe->length > 0x80000000U)
return -EINVAL;
break;
case IB_QPT_SMI:
case IB_QPT_GSI:
case IB_QPT_UD:
ah = ibah_to_rvtah(wqe->ud_wr.ah);
if (wqe->length > (1 << ah->log_pmtu))
return -EINVAL;
break;
default:
break;
}
return 0;
}
#ifdef CONFIG_DEBUG_FS
struct qib_qp_iter {

44
drivers/infiniband/hw/qib/qib_rc.c
View File

@ -226,6 +226,8 @@ static int qib_make_rc_ack(struct qib_ibdev *dev, struct rvt_qp *qp,
* qib_make_rc_req - construct a request packet (SEND, RDMA r/w, ATOMIC)
* @qp: a pointer to the QP
*
* Assumes the s_lock is held.
*
* Return 1 if constructed; otherwise, return 0.
*/
int qib_make_rc_req(struct rvt_qp *qp)
@ -241,7 +243,6 @@ int qib_make_rc_req(struct rvt_qp *qp)
u32 bth2;
u32 pmtu = qp->pmtu;
char newreq;
unsigned long flags;
int ret = 0;
int delta;
@ -249,12 +250,6 @@ int qib_make_rc_req(struct rvt_qp *qp)
if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
ohdr = &priv->s_hdr->u.l.oth;
/*
* The lock is needed to synchronize between the sending tasklet,
* the receive interrupt handler, and timeout resends.
*/
spin_lock_irqsave(&qp->s_lock, flags);
/* Sending responses has higher priority over sending requests. */
if ((qp->s_flags & RVT_S_RESP_PENDING) &&
qib_make_rc_ack(dev, qp, ohdr, pmtu))
@ -264,7 +259,8 @@ int qib_make_rc_req(struct rvt_qp *qp)
if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND))
goto bail;
/* We are in the error state, flush the work request. */
if (qp->s_last == qp->s_head)
smp_read_barrier_depends(); /* see post_one_send() */
if (qp->s_last == ACCESS_ONCE(qp->s_head))
goto bail;
/* If DMAs are in progress, we can't flush immediately. */
if (atomic_read(&priv->s_dma_busy)) {
@ -321,8 +317,8 @@ int qib_make_rc_req(struct rvt_qp *qp)
qp->s_flags |= RVT_S_WAIT_FENCE;
goto bail;
}
wqe->psn = qp->s_next_psn;
newreq = 1;
qp->s_psn = wqe->psn;
}
/*
* Note that we have to be careful not to modify the
@ -341,9 +337,7 @@ int qib_make_rc_req(struct rvt_qp *qp)
qp->s_flags |= RVT_S_WAIT_SSN_CREDIT;
goto bail;
}
wqe->lpsn = wqe->psn;
if (len > pmtu) {
wqe->lpsn += (len - 1) / pmtu;
qp->s_state = OP(SEND_FIRST);
len = pmtu;
break;
@ -381,9 +375,7 @@ int qib_make_rc_req(struct rvt_qp *qp)
cpu_to_be32(wqe->rdma_wr.rkey);
ohdr->u.rc.reth.length = cpu_to_be32(len);
hwords += sizeof(struct ib_reth) / sizeof(u32);
wqe->lpsn = wqe->psn;
if (len > pmtu) {
wqe->lpsn += (len - 1) / pmtu;
qp->s_state = OP(RDMA_WRITE_FIRST);
len = pmtu;
break;
@ -418,13 +410,6 @@ int qib_make_rc_req(struct rvt_qp *qp)
qp->s_num_rd_atomic++;
if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT))
qp->s_lsn++;
/*
* Adjust s_next_psn to count the
* expected number of responses.
*/
if (len > pmtu)
qp->s_next_psn += (len - 1) / pmtu;
wqe->lpsn = qp->s_next_psn++;
}
ohdr->u.rc.reth.vaddr =
@ -456,7 +441,6 @@ int qib_make_rc_req(struct rvt_qp *qp)
qp->s_num_rd_atomic++;
if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT))
qp->s_lsn++;
wqe->lpsn = wqe->psn;
}
if (wqe->atomic_wr.wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
qp->s_state = OP(COMPARE_SWAP);
@ -499,11 +483,8 @@ int qib_make_rc_req(struct rvt_qp *qp)
}
if (wqe->wr.opcode == IB_WR_RDMA_READ)
qp->s_psn = wqe->lpsn + 1;
else {
else
qp->s_psn++;
if (qib_cmp24(qp->s_psn, qp->s_next_psn) > 0)
qp->s_next_psn = qp->s_psn;
}
break;
case OP(RDMA_READ_RESPONSE_FIRST):
@ -523,8 +504,6 @@ int qib_make_rc_req(struct rvt_qp *qp)
/* FALLTHROUGH */
case OP(SEND_MIDDLE):
bth2 = qp->s_psn++ & QIB_PSN_MASK;
if (qib_cmp24(qp->s_psn, qp->s_next_psn) > 0)
qp->s_next_psn = qp->s_psn;
ss = &qp->s_sge;
len = qp->s_len;
if (len > pmtu) {
@ -564,8 +543,6 @@ int qib_make_rc_req(struct rvt_qp *qp)
/* FALLTHROUGH */
case OP(RDMA_WRITE_MIDDLE):
bth2 = qp->s_psn++ & QIB_PSN_MASK;
if (qib_cmp24(qp->s_psn, qp->s_next_psn) > 0)
qp->s_next_psn = qp->s_psn;
ss = &qp->s_sge;
len = qp->s_len;
if (len > pmtu) {
@ -630,13 +607,9 @@ int qib_make_rc_req(struct rvt_qp *qp)
qp->s_cur_size = len;
qib_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24), bth2);
done:
ret = 1;
goto unlock;
return 1;
bail:
qp->s_flags &= ~RVT_S_BUSY;
unlock:
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}
@ -1454,7 +1427,8 @@ static void qib_rc_rcv_resp(struct qib_ibport *ibp,
goto ack_done;
/* Ignore invalid responses. */
if (qib_cmp24(psn, qp->s_next_psn) >= 0)
smp_read_barrier_depends(); /* see post_one_send */
if (qib_cmp24(psn, ACCESS_ONCE(qp->s_next_psn)) >= 0)
goto ack_done;
/* Ignore duplicate responses. */

11
drivers/infiniband/hw/qib/qib_ruc.c
View File

@ -391,7 +391,8 @@ static void qib_ruc_loopback(struct rvt_qp *sqp)
sqp->s_flags |= RVT_S_BUSY;
again:
if (sqp->s_last == sqp->s_head)
smp_read_barrier_depends(); /* see post_one_send() */
if (sqp->s_last == ACCESS_ONCE(sqp->s_head))
goto clr_busy;
wqe = rvt_get_swqe_ptr(sqp, sqp->s_last);
@ -765,22 +766,24 @@ void qib_do_send(struct rvt_qp *qp)
qp->s_flags |= RVT_S_BUSY;
spin_unlock_irqrestore(&qp->s_lock, flags);
do {
/* Check for a constructed packet to be sent. */
if (qp->s_hdrwords != 0) {
spin_unlock_irqrestore(&qp->s_lock, flags);
/*
* If the packet cannot be sent now, return and
* the send tasklet will be woken up later.
*/
if (qib_verbs_send(qp, priv->s_hdr, qp->s_hdrwords,
qp->s_cur_sge, qp->s_cur_size))
break;
return;
/* Record that s_hdr is empty. */
qp->s_hdrwords = 0;
spin_lock_irqsave(&qp->s_lock, flags);
}
} while (make_req(qp));
spin_unlock_irqrestore(&qp->s_lock, flags);
}
/*

22
drivers/infiniband/hw/qib/qib_uc.c
View File

@ -41,6 +41,8 @@
* qib_make_uc_req - construct a request packet (SEND, RDMA write)
* @qp: a pointer to the QP
*
* Assumes the s_lock is held.
*
* Return 1 if constructed; otherwise, return 0.
*/
int qib_make_uc_req(struct rvt_qp *qp)
@ -48,20 +50,18 @@ int qib_make_uc_req(struct rvt_qp *qp)
struct qib_qp_priv *priv = qp->priv;
struct qib_other_headers *ohdr;
struct rvt_swqe *wqe;
unsigned long flags;
u32 hwords;
u32 bth0;
u32 len;
u32 pmtu = qp->pmtu;
int ret = 0;
spin_lock_irqsave(&qp->s_lock, flags);
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_SEND_OK)) {
if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND))
goto bail;
/* We are in the error state, flush the work request. */
if (qp->s_last == qp->s_head)
smp_read_barrier_depends(); /* see post_one_send() */
if (qp->s_last == ACCESS_ONCE(qp->s_head))
goto bail;
/* If DMAs are in progress, we can't flush immediately. */
if (atomic_read(&priv->s_dma_busy)) {
@ -90,13 +90,13 @@ int qib_make_uc_req(struct rvt_qp *qp)
RVT_PROCESS_NEXT_SEND_OK))
goto bail;
/* Check if send work queue is empty. */
if (qp->s_cur == qp->s_head)
smp_read_barrier_depends(); /* see post_one_send() */
if (qp->s_cur == ACCESS_ONCE(qp->s_head))
goto bail;
/*
* Start a new request.
*/
wqe->psn = qp->s_next_psn;
qp->s_psn = qp->s_next_psn;
qp->s_psn = wqe->psn;
qp->s_sge.sge = wqe->sg_list[0];
qp->s_sge.sg_list = wqe->sg_list + 1;
qp->s_sge.num_sge = wqe->wr.num_sge;
@ -215,15 +215,11 @@ int qib_make_uc_req(struct rvt_qp *qp)
qp->s_cur_sge = &qp->s_sge;
qp->s_cur_size = len;
qib_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24),
qp->s_next_psn++ & QIB_PSN_MASK);
qp->s_psn++ & QIB_PSN_MASK);
done:
ret = 1;
goto unlock;
return 1;
bail:
qp->s_flags &= ~RVT_S_BUSY;
unlock:
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}

22
drivers/infiniband/hw/qib/qib_ud.c
View File

@ -234,6 +234,8 @@ static void qib_ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe)
* qib_make_ud_req - construct a UD request packet
* @qp: the QP
*
* Assumes the s_lock is held.
*
* Return 1 if constructed; otherwise, return 0.
*/
int qib_make_ud_req(struct rvt_qp *qp)
@ -244,7 +246,6 @@ int qib_make_ud_req(struct rvt_qp *qp)
struct qib_pportdata *ppd;
struct qib_ibport *ibp;
struct rvt_swqe *wqe;
unsigned long flags;
u32 nwords;
u32 extra_bytes;
u32 bth0;
@ -253,13 +254,12 @@ int qib_make_ud_req(struct rvt_qp *qp)
int ret = 0;
int next_cur;
spin_lock_irqsave(&qp->s_lock, flags);
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_NEXT_SEND_OK)) {
if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND))
goto bail;
/* We are in the error state, flush the work request. */
if (qp->s_last == qp->s_head)
smp_read_barrier_depends(); /* see post_one_send */
if (qp->s_last == ACCESS_ONCE(qp->s_head))
goto bail;
/* If DMAs are in progress, we can't flush immediately. */
if (atomic_read(&priv->s_dma_busy)) {
@ -271,7 +271,9 @@ int qib_make_ud_req(struct rvt_qp *qp)
goto done;
}
if (qp->s_cur == qp->s_head)
/* see post_one_send() */
smp_read_barrier_depends();
if (qp->s_cur == ACCESS_ONCE(qp->s_head))
goto bail;
wqe = rvt_get_swqe_ptr(qp, qp->s_cur);
@ -292,6 +294,7 @@ int qib_make_ud_req(struct rvt_qp *qp)
this_cpu_inc(ibp->pmastats->n_unicast_xmit);
lid = ah_attr->dlid & ~((1 << ppd->lmc) - 1);
if (unlikely(lid == ppd->lid)) {
unsigned long flags;
/*
* If DMAs are in progress, we can't generate
* a completion for the loopback packet since
@ -304,6 +307,7 @@ int qib_make_ud_req(struct rvt_qp *qp)
goto bail;
}
qp->s_cur = next_cur;
local_irq_save(flags);
spin_unlock_irqrestore(&qp->s_lock, flags);
qib_ud_loopback(qp, wqe);
spin_lock_irqsave(&qp->s_lock, flags);
@ -378,7 +382,7 @@ int qib_make_ud_req(struct rvt_qp *qp)
ah_attr->dlid != be16_to_cpu(IB_LID_PERMISSIVE) ?
cpu_to_be32(QIB_MULTICAST_QPN) :
cpu_to_be32(wqe->ud_wr.remote_qpn);
ohdr->bth[2] = cpu_to_be32(qp->s_next_psn++ & QIB_PSN_MASK);
ohdr->bth[2] = cpu_to_be32(wqe->psn & QIB_PSN_MASK);
/*
* Qkeys with the high order bit set mean use the
* qkey from the QP context instead of the WR (see 10.2.5).
@ -388,13 +392,9 @@ int qib_make_ud_req(struct rvt_qp *qp)
ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num);
done:
ret = 1;
goto unlock;
return 1;
bail:
qp->s_flags &= ~RVT_S_BUSY;
unlock:
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}

39
drivers/infiniband/hw/qib/qib_verbs.c
View File

@ -1662,6 +1662,7 @@ int qib_register_ib_device(struct qib_devdata *dd)
dd->verbs_dev.rdi.driver_f.get_card_name = qib_get_card_name;
dd->verbs_dev.rdi.driver_f.get_pci_dev = qib_get_pci_dev;
dd->verbs_dev.rdi.driver_f.check_ah = qib_check_ah;
dd->verbs_dev.rdi.driver_f.check_send_wqe = qib_check_send_wqe;
dd->verbs_dev.rdi.driver_f.notify_new_ah = qib_notify_new_ah;
dd->verbs_dev.rdi.driver_f.alloc_qpn = qib_alloc_qpn;
dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qib_qp_priv_alloc;
@ -1677,6 +1678,7 @@ int qib_register_ib_device(struct qib_devdata *dd)
dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = qib_mtu_to_path_mtu;
dd->verbs_dev.rdi.driver_f.mtu_from_qp = qib_mtu_from_qp;
dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = qib_get_pmtu_from_attr;
dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _qib_schedule_send;
dd->verbs_dev.rdi.driver_f.query_port_state = qib_query_port;
dd->verbs_dev.rdi.driver_f.shut_down_port = qib_shut_down_port;
dd->verbs_dev.rdi.driver_f.cap_mask_chg = qib_cap_mask_chg;
@ -1778,17 +1780,34 @@ void qib_unregister_ib_device(struct qib_devdata *dd)
dev->pio_hdrs, dev->pio_hdrs_phys);
}
/*
* This must be called with s_lock held.
/**
* _qib_schedule_send - schedule progress
* @qp - the qp
*
* This schedules progress w/o regard to the s_flags.
*
* It is only used in post send, which doesn't hold
* the s_lock.
*/
void _qib_schedule_send(struct rvt_qp *qp)
{
struct qib_ibport *ibp =
to_iport(qp->ibqp.device, qp->port_num);
struct qib_pportdata *ppd = ppd_from_ibp(ibp);
struct qib_qp_priv *priv = qp->priv;
queue_work(ppd->qib_wq, &priv->s_work);
}
/**
* qib_schedule_send - schedule progress
* @qp - the qp
*
* This schedules qp progress. The s_lock
* should be held.
*/
void qib_schedule_send(struct rvt_qp *qp)
{
struct qib_qp_priv *priv = qp->priv;
if (qib_send_ok(qp)) {
struct qib_ibport *ibp =
to_iport(qp->ibqp.device, qp->port_num);
struct qib_pportdata *ppd = ppd_from_ibp(ibp);
queue_work(ppd->qib_wq, &priv->s_work);
}
if (qib_send_ok(qp))
_qib_schedule_send(qp);
}

6
drivers/infiniband/hw/qib/qib_verbs.h
View File

@ -298,9 +298,7 @@ static inline int qib_send_ok(struct rvt_qp *qp)
!(qp->s_flags & RVT_S_ANY_WAIT_SEND));
}
/*
* This must be called with s_lock held.
*/
void _qib_schedule_send(struct rvt_qp *qp);
void qib_schedule_send(struct rvt_qp *qp);
static inline int qib_pkey_ok(u16 pkey1, u16 pkey2)
@ -392,6 +390,8 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr,
int qib_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
int qib_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid);
void qib_rc_rnr_retry(unsigned long arg);

97
drivers/infiniband/sw/rdmavt/qp.c
View File

@ -401,6 +401,7 @@ void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp,
rdi->driver_f.flush_qp_waiters(qp);
qp->s_flags &= ~(RVT_S_TIMER | RVT_S_ANY_WAIT);
spin_unlock(&qp->s_lock);
spin_unlock(&qp->s_hlock);
spin_unlock_irq(&qp->r_lock);
/* Stop the send queue and the retry timer */
@ -415,6 +416,7 @@ void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp,
/* grab the lock b/c it was locked at call time */
spin_lock_irq(&qp->r_lock);
spin_lock(&qp->s_hlock);
spin_lock(&qp->s_lock);
rvt_clear_mr_refs(qp, 1);
@ -610,6 +612,7 @@ struct ib_qp *rvt_create_qp(struct ib_pd *ibpd,
* except for qp->ibqp.qp_num.
*/
spin_lock_init(&qp->r_lock);
spin_lock_init(&qp->s_hlock);
spin_lock_init(&qp->s_lock);
spin_lock_init(&qp->r_rq.lock);
atomic_set(&qp->refcount, 0);
@ -620,6 +623,7 @@ struct ib_qp *rvt_create_qp(struct ib_pd *ibpd,
qp->state = IB_QPS_RESET;
qp->s_wq = swq;
qp->s_size = init_attr->cap.max_send_wr + 1;
qp->s_avail = init_attr->cap.max_send_wr;
qp->s_max_sge = init_attr->cap.max_send_sge;
if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR)
qp->s_flags = RVT_S_SIGNAL_REQ_WR;
@ -779,6 +783,7 @@ void rvt_clear_mr_refs(struct rvt_qp *qp, int clr_sends)
wqe->ud_wr.ah)->refcount);
if (++qp->s_last >= qp->s_size)
qp->s_last = 0;
smp_wmb(); /* see qp_set_savail */
}
if (qp->s_rdma_mr) {
rvt_put_mr(qp->s_rdma_mr);
@ -833,7 +838,7 @@ int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err)
rdi->driver_f.notify_error_qp(qp);
/* Schedule the sending tasklet to drain the send work queue. */
if (qp->s_last != qp->s_head)
if (ACCESS_ONCE(qp->s_last) != qp->s_head)
rdi->driver_f.schedule_send(qp);
rvt_clear_mr_refs(qp, 0);
@ -979,6 +984,7 @@ int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
link = rdma_port_get_link_layer(ibqp->device, qp->port_num);
spin_lock_irq(&qp->r_lock);
spin_lock(&qp->s_hlock);
spin_lock(&qp->s_lock);
cur_state = attr_mask & IB_QP_CUR_STATE ?
@ -1151,6 +1157,7 @@ int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
if (attr_mask & IB_QP_PATH_MTU) {
qp->pmtu = rdi->driver_f.mtu_from_qp(rdi, qp, pmtu);
qp->path_mtu = rdi->driver_f.mtu_to_path_mtu(qp->pmtu);
qp->log_pmtu = ilog2(qp->pmtu);
}
if (attr_mask & IB_QP_RETRY_CNT) {
@ -1186,6 +1193,7 @@ int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
rdi->driver_f.modify_qp(qp, attr, attr_mask, udata);
spin_unlock(&qp->s_lock);
spin_unlock(&qp->s_hlock);
spin_unlock_irq(&qp->r_lock);
if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
@ -1207,6 +1215,7 @@ int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
inval:
spin_unlock(&qp->s_lock);
spin_unlock(&qp->s_hlock);
spin_unlock_irq(&qp->r_lock);
return -EINVAL;
}
@ -1226,9 +1235,11 @@ int rvt_destroy_qp(struct ib_qp *ibqp)
struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device);
spin_lock_irq(&qp->r_lock);
spin_lock(&qp->s_hlock);
spin_lock(&qp->s_lock);
rvt_reset_qp(rdi, qp, ibqp->qp_type);
spin_unlock(&qp->s_lock);
spin_unlock(&qp->s_hlock);
spin_unlock_irq(&qp->r_lock);
/* qpn is now available for use again */
@ -1357,6 +1368,28 @@ int rvt_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
return 0;
}
/**
* qp_get_savail - return number of avail send entries
*
* @qp - the qp
*
* This assumes the s_hlock is held but the s_last
* qp variable is uncontrolled.
*/
static inline u32 qp_get_savail(struct rvt_qp *qp)
{
u32 slast;
u32 ret;
smp_read_barrier_depends(); /* see rc.c */
slast = ACCESS_ONCE(qp->s_last);
if (qp->s_head >= slast)
ret = qp->s_size - (qp->s_head - slast);
else
ret = slast - qp->s_head;
return ret - 1;
}
/**
* rvt_post_one_wr - post one RC, UC, or UD send work request
* @qp: the QP to post on
@ -1372,6 +1405,8 @@ static int rvt_post_one_wr(struct rvt_qp *qp, struct ib_send_wr *wr)
struct rvt_lkey_table *rkt;
struct rvt_pd *pd;
struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device);
u8 log_pmtu;
int ret;
/* IB spec says that num_sge == 0 is OK. */
if (unlikely(wr->num_sge > qp->s_max_sge))
@ -1403,16 +1438,16 @@ static int rvt_post_one_wr(struct rvt_qp *qp, struct ib_send_wr *wr)
} else if (wr->opcode >= IB_WR_RDMA_READ && !qp->s_max_rd_atomic) {
return -EINVAL;
}
/* check for avail */
if (unlikely(!qp->s_avail)) {
qp->s_avail = qp_get_savail(qp);
WARN_ON(qp->s_avail > (qp->s_size - 1));
if (!qp->s_avail)
return -ENOMEM;
}
next = qp->s_head + 1;
if (next >= qp->s_size)
next = 0;
if (next == qp->s_last)
return -ENOMEM;
if (rdi->driver_f.check_send_wr &&
rdi->driver_f.check_send_wr(qp, wr))
return -EINVAL;
rkt = &rdi->lkey_table;
pd = ibpd_to_rvtpd(qp->ibqp.pd);
@ -1444,21 +1479,39 @@ static int rvt_post_one_wr(struct rvt_qp *qp, struct ib_send_wr *wr)
continue;
ok = rvt_lkey_ok(rkt, pd, &wqe->sg_list[j],
&wr->sg_list[i], acc);
if (!ok)
if (!ok) {
ret = -EINVAL;
goto bail_inval_free;
}
wqe->length += length;
j++;
}
wqe->wr.num_sge = j;
}
if (qp->ibqp.qp_type == IB_QPT_UC ||
qp->ibqp.qp_type == IB_QPT_RC) {
if (wqe->length > 0x80000000U)
/* general part of wqe valid - allow for driver checks */
if (rdi->driver_f.check_send_wqe) {
ret = rdi->driver_f.check_send_wqe(qp, wqe);
if (ret)
goto bail_inval_free;
} else {
}
log_pmtu = qp->log_pmtu;
if (qp->ibqp.qp_type != IB_QPT_UC &&
qp->ibqp.qp_type != IB_QPT_RC) {
struct rvt_ah *ah = ibah_to_rvtah(wqe->ud_wr.ah);
log_pmtu = ah->log_pmtu;
atomic_inc(&ibah_to_rvtah(ud_wr(wr)->ah)->refcount);
}
wqe->ssn = qp->s_ssn++;
wqe->psn = qp->s_next_psn;
wqe->lpsn = wqe->psn +
(wqe->length ? ((wqe->length - 1) >> log_pmtu) : 0);
qp->s_next_psn = wqe->lpsn + 1;
smp_wmb(); /* see request builders */
qp->s_avail--;
qp->s_head = next;
return 0;
@ -1470,7 +1523,7 @@ static int rvt_post_one_wr(struct rvt_qp *qp, struct ib_send_wr *wr)
rvt_put_mr(sge->mr);
}
return -EINVAL;
return ret;
}
/**
@ -1491,14 +1544,14 @@ int rvt_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
unsigned nreq = 0;
int err = 0;
spin_lock_irqsave(&qp->s_lock, flags);
spin_lock_irqsave(&qp->s_hlock, flags);
/*
* Ensure QP state is such that we can send. If not bail out early,
* there is no need to do this every time we post a send.
*/
if (unlikely(!(ib_rvt_state_ops[qp->state] & RVT_POST_SEND_OK))) {
spin_unlock_irqrestore(&qp->s_lock, flags);
spin_unlock_irqrestore(&qp->s_hlock, flags);
return -EINVAL;
}
@ -1518,11 +1571,13 @@ int rvt_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
nreq++;
}
bail:
if (nreq && !call_send)
rdi->driver_f.schedule_send(qp);
spin_unlock_irqrestore(&qp->s_lock, flags);
if (nreq && call_send)
rdi->driver_f.do_send(qp);
spin_unlock_irqrestore(&qp->s_hlock, flags);
if (nreq) {
if (call_send)
rdi->driver_f.schedule_send_no_lock(qp);
else
rdi->driver_f.do_send(qp);
}
return err;
}

79
drivers/staging/rdma/hfi1/qp.c
View File

@ -226,16 +226,45 @@ void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
}
}
int hfi1_check_send_wr(struct rvt_qp *qp, struct ib_send_wr *wr)
/**
* hfi1_check_send_wqe - validate wqe
* @qp - The qp
* @wqe - The built wqe
*
* validate wqe. This is called
* prior to inserting the wqe into
* the ring but after the wqe has been
* setup.
*
* Returns 0 on success, -EINVAL on failure
*
*/
int hfi1_check_send_wqe(struct rvt_qp *qp,
struct rvt_swqe *wqe)
{
struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
struct rvt_ah *ah = ibah_to_rvtah(ud_wr(wr)->ah);
struct rvt_ah *ah;
if (qp->ibqp.qp_type != IB_QPT_RC &&
qp->ibqp.qp_type != IB_QPT_UC &&
qp->ibqp.qp_type != IB_QPT_SMI &&
ibp->sl_to_sc[ah->attr.sl] == 0xf) {
return -EINVAL;
switch (qp->ibqp.qp_type) {
case IB_QPT_RC:
case IB_QPT_UC:
if (wqe->length > 0x80000000U)
return -EINVAL;
break;
case IB_QPT_SMI:
ah = ibah_to_rvtah(wqe->ud_wr.ah);
if (wqe->length > (1 << ah->log_pmtu))
return -EINVAL;
break;
case IB_QPT_GSI:
case IB_QPT_UD:
ah = ibah_to_rvtah(wqe->ud_wr.ah);
if (wqe->length > (1 << ah->log_pmtu))
return -EINVAL;
if (ibp->sl_to_sc[ah->attr.sl] == 0xf)
return -EINVAL;
default:
break;
}
return 0;
}
@ -301,6 +330,42 @@ __be32 hfi1_compute_aeth(struct rvt_qp *qp)
return cpu_to_be32(aeth);
}
/**
* _hfi1_schedule_send - schedule progress
* @qp: the QP
*
* This schedules qp progress w/o regard to the s_flags.
*
* It is only used in the post send, which doesn't hold
* the s_lock.
*/
void _hfi1_schedule_send(struct rvt_qp *qp)
{
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_ibport *ibp =
to_iport(qp->ibqp.device, qp->port_num);
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
iowait_schedule(&priv->s_iowait, ppd->hfi1_wq,
priv->s_sde ?
priv->s_sde->cpu :
cpumask_first(cpumask_of_node(dd->node)));
}
/**
* hfi1_schedule_send - schedule progress
* @qp: the QP
*
* This schedules qp progress and caller should hold
* the s_lock.
*/
void hfi1_schedule_send(struct rvt_qp *qp)
{
if (hfi1_send_ok(qp))
_hfi1_schedule_send(qp);
}
/**
* hfi1_get_credit - flush the send work queue of a QP
* @qp: the qp who's send work queue to flush

37
drivers/staging/rdma/hfi1/qp.h
View File

@ -137,41 +137,8 @@ void qp_iter_print(struct seq_file *s, struct qp_iter *iter);
*/
void qp_comm_est(struct rvt_qp *qp);
/**
* _hfi1_schedule_send - schedule progress
* @qp: the QP
*
* This schedules qp progress w/o regard to the s_flags.
*
* It is only used in the post send, which doesn't hold
* the s_lock.
*/
static inline void _hfi1_schedule_send(struct rvt_qp *qp)
{
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_ibport *ibp =
to_iport(qp->ibqp.device, qp->port_num);
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
iowait_schedule(&priv->s_iowait, ppd->hfi1_wq,
priv->s_sde ?
priv->s_sde->cpu :
cpumask_first(cpumask_of_node(dd->node)));
}
/**
* hfi1_schedule_send - schedule progress
* @qp: the QP
*
* This schedules qp progress and caller should hold
* the s_lock.
*/
static inline void hfi1_schedule_send(struct rvt_qp *qp)
{
if (hfi1_send_ok(qp))
_hfi1_schedule_send(qp);
}
void _hfi1_schedule_send(struct rvt_qp *qp);
void hfi1_schedule_send(struct rvt_qp *qp);
void hfi1_migrate_qp(struct rvt_qp *qp);

44
drivers/staging/rdma/hfi1/rc.c
View File

@ -367,6 +367,8 @@ static int make_rc_ack(struct hfi1_ibdev *dev, struct rvt_qp *qp,
* hfi1_make_rc_req - construct a request packet (SEND, RDMA r/w, ATOMIC)
* @qp: a pointer to the QP
*
* Assumes s_lock is held.
*
* Return 1 if constructed; otherwise, return 0.
*/
int hfi1_make_rc_req(struct rvt_qp *qp)
@ -383,7 +385,6 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
u32 bth2;
u32 pmtu = qp->pmtu;
char newreq;
unsigned long flags;
int ret = 0;
int middle = 0;
int delta;
@ -392,12 +393,6 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
ohdr = &priv->s_hdr->ibh.u.l.oth;
/*
* The lock is needed to synchronize between the sending tasklet,
* the receive interrupt handler, and timeout re-sends.
*/
spin_lock_irqsave(&qp->s_lock, flags);
/* Sending responses has higher priority over sending requests. */
if ((qp->s_flags & RVT_S_RESP_PENDING) &&
make_rc_ack(dev, qp, ohdr, pmtu))
@ -407,7 +402,8 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND))
goto bail;
/* We are in the error state, flush the work request. */
if (qp->s_last == qp->s_head)
smp_read_barrier_depends(); /* see post_one_send() */
if (qp->s_last == ACCESS_ONCE(qp->s_head))
goto bail;
/* If DMAs are in progress, we can't flush immediately. */
if (atomic_read(&priv->s_iowait.sdma_busy)) {
@ -463,8 +459,8 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
qp->s_flags |= RVT_S_WAIT_FENCE;
goto bail;
}
wqe->psn = qp->s_next_psn;
newreq = 1;
qp->s_psn = wqe->psn;
}
/*
* Note that we have to be careful not to modify the
@ -483,9 +479,7 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
qp->s_flags |= RVT_S_WAIT_SSN_CREDIT;
goto bail;
}
wqe->lpsn = wqe->psn;
if (len > pmtu) {
wqe->lpsn += (len - 1) / pmtu;
qp->s_state = OP(SEND_FIRST);
len = pmtu;
break;
@ -522,9 +516,7 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
cpu_to_be32(wqe->rdma_wr.rkey);
ohdr->u.rc.reth.length = cpu_to_be32(len);
hwords += sizeof(struct ib_reth) / sizeof(u32);
wqe->lpsn = wqe->psn;
if (len > pmtu) {
wqe->lpsn += (len - 1) / pmtu;
qp->s_state = OP(RDMA_WRITE_FIRST);
len = pmtu;
break;
@ -559,13 +551,6 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
qp->s_num_rd_atomic++;
if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT))
qp->s_lsn++;
/*
* Adjust s_next_psn to count the
* expected number of responses.
*/
if (len > pmtu)
qp->s_next_psn += (len - 1) / pmtu;
wqe->lpsn = qp->s_next_psn++;
}
ohdr->u.rc.reth.vaddr =
cpu_to_be64(wqe->rdma_wr.remote_addr);
@ -596,7 +581,6 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
qp->s_num_rd_atomic++;
if (!(qp->s_flags & RVT_S_UNLIMITED_CREDIT))
qp->s_lsn++;
wqe->lpsn = wqe->psn;
}
if (wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
qp->s_state = OP(COMPARE_SWAP);
@ -639,11 +623,8 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
}
if (wqe->wr.opcode == IB_WR_RDMA_READ)
qp->s_psn = wqe->lpsn + 1;
else {
else
qp->s_psn++;
if (cmp_psn(qp->s_psn, qp->s_next_psn) > 0)
qp->s_next_psn = qp->s_psn;
}
break;
case OP(RDMA_READ_RESPONSE_FIRST):
@ -663,8 +644,6 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
/* FALLTHROUGH */
case OP(SEND_MIDDLE):
bth2 = mask_psn(qp->s_psn++);
if (cmp_psn(qp->s_psn, qp->s_next_psn) > 0)
qp->s_next_psn = qp->s_psn;
ss = &qp->s_sge;
len = qp->s_len;
if (len > pmtu) {
@ -705,8 +684,6 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
/* FALLTHROUGH */
case OP(RDMA_WRITE_MIDDLE):
bth2 = mask_psn(qp->s_psn++);
if (cmp_psn(qp->s_psn, qp->s_next_psn) > 0)
qp->s_next_psn = qp->s_psn;
ss = &qp->s_sge;
len = qp->s_len;
if (len > pmtu) {
@ -777,13 +754,9 @@ int hfi1_make_rc_req(struct rvt_qp *qp)
bth2,
middle);
done:
ret = 1;
goto unlock;
return 1;
bail:
qp->s_flags &= ~RVT_S_BUSY;
unlock:
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}
@ -1563,7 +1536,8 @@ static void rc_rcv_resp(struct hfi1_ibport *ibp,
trace_hfi1_rc_ack(qp, psn);
/* Ignore invalid responses. */
if (cmp_psn(psn, qp->s_next_psn) >= 0)
smp_read_barrier_depends(); /* see post_one_send */
if (cmp_psn(psn, ACCESS_ONCE(qp->s_next_psn)) >= 0)
goto ack_done;
/* Ignore duplicate responses. */

40
drivers/staging/rdma/hfi1/ruc.c
View File

@ -392,7 +392,8 @@ static void ruc_loopback(struct rvt_qp *sqp)
sqp->s_flags |= RVT_S_BUSY;
again:
if (sqp->s_last == sqp->s_head)
smp_read_barrier_depends(); /* see post_one_send() */
if (sqp->s_last == ACCESS_ONCE(sqp->s_head))
goto clr_busy;
wqe = rvt_get_swqe_ptr(sqp, sqp->s_last);
@ -871,40 +872,43 @@ void hfi1_do_send(struct rvt_qp *qp)
qp->s_flags |= RVT_S_BUSY;
spin_unlock_irqrestore(&qp->s_lock, flags);
timeout = jiffies + (timeout_int) / 8;
cpu = priv->s_sde ? priv->s_sde->cpu :
cpumask_first(cpumask_of_node(ps.ppd->dd->node));
do {
/* Check for a constructed packet to be sent. */
if (qp->s_hdrwords != 0) {
spin_unlock_irqrestore(&qp->s_lock, flags);
/*
* If the packet cannot be sent now, return and
* the send tasklet will be woken up later.
*/
if (hfi1_verbs_send(qp, &ps))
break;
return;
/* Record that s_hdr is empty. */
qp->s_hdrwords = 0;
}
/* allow other tasks to run */
if (unlikely(time_after(jiffies, timeout))) {
if (workqueue_congested(cpu, ps.ppd->hfi1_wq)) {
spin_lock_irqsave(&qp->s_lock, flags);
qp->s_flags &= ~RVT_S_BUSY;
hfi1_schedule_send(qp);
spin_unlock_irqrestore(&qp->s_lock,
flags);
/* allow other tasks to run */
if (unlikely(time_after(jiffies, timeout))) {
if (workqueue_congested(cpu,
ps.ppd->hfi1_wq)) {
spin_lock_irqsave(&qp->s_lock, flags);
qp->s_flags &= ~RVT_S_BUSY;
hfi1_schedule_send(qp);
spin_unlock_irqrestore(&qp->s_lock,
flags);
this_cpu_inc(
*ps.ppd->dd->send_schedule);
return;
}
cond_resched();
this_cpu_inc(*ps.ppd->dd->send_schedule);
return;
timeout = jiffies + (timeout_int) / 8;
}
cond_resched();
this_cpu_inc(*ps.ppd->dd->send_schedule);
timeout = jiffies + (timeout_int) / 8;
spin_lock_irqsave(&qp->s_lock, flags);
}
} while (make_req(qp));
spin_unlock_irqrestore(&qp->s_lock, flags);
}
/*

21
drivers/staging/rdma/hfi1/uc.c
View File

@ -59,6 +59,8 @@
* hfi1_make_uc_req - construct a request packet (SEND, RDMA write)
* @qp: a pointer to the QP
*
* Assume s_lock is held.
*
* Return 1 if constructed; otherwise, return 0.
*/
int hfi1_make_uc_req(struct rvt_qp *qp)
@ -66,7 +68,6 @@ int hfi1_make_uc_req(struct rvt_qp *qp)
struct hfi1_qp_priv *priv = qp->priv;
struct hfi1_other_headers *ohdr;
struct rvt_swqe *wqe;
unsigned long flags;
u32 hwords = 5;
u32 bth0 = 0;
u32 len;
@ -74,13 +75,12 @@ int hfi1_make_uc_req(struct rvt_qp *qp)
int ret = 0;
int middle = 0;
spin_lock_irqsave(&qp->s_lock, flags);
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_SEND_OK)) {
if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND))
goto bail;
/* We are in the error state, flush the work request. */
if (qp->s_last == qp->s_head)
smp_read_barrier_depends(); /* see post_one_send() */
if (qp->s_last == ACCESS_ONCE(qp->s_head))
goto bail;
/* If DMAs are in progress, we can't flush immediately. */
if (atomic_read(&priv->s_iowait.sdma_busy)) {
@ -106,15 +106,15 @@ int hfi1_make_uc_req(struct rvt_qp *qp)
RVT_PROCESS_NEXT_SEND_OK))
goto bail;
/* Check if send work queue is empty. */
if (qp->s_cur == qp->s_head) {
smp_read_barrier_depends(); /* see post_one_send() */
if (qp->s_cur == ACCESS_ONCE(qp->s_head)) {
clear_ahg(qp);
goto bail;
}
/*
* Start a new request.
*/
wqe->psn = qp->s_next_psn;
qp->s_psn = qp->s_next_psn;
qp->s_psn = wqe->psn;
qp->s_sge.sge = wqe->sg_list[0];
qp->s_sge.sg_list = wqe->sg_list + 1;
qp->s_sge.num_sge = wqe->wr.num_sge;
@ -235,15 +235,12 @@ int hfi1_make_uc_req(struct rvt_qp *qp)
qp->s_cur_sge = &qp->s_sge;
qp->s_cur_size = len;
hfi1_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24),
mask_psn(qp->s_next_psn++), middle);
mask_psn(qp->s_psn++), middle);
done:
ret = 1;
goto unlock;
return 1;
bail:
qp->s_flags &= ~RVT_S_BUSY;
unlock:
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}

22
drivers/staging/rdma/hfi1/ud.c
View File

@ -261,6 +261,8 @@ static void ud_loopback(struct rvt_qp *sqp, struct rvt_swqe *swqe)
* hfi1_make_ud_req - construct a UD request packet
* @qp: the QP
*
* Assume s_lock is held.
*
* Return 1 if constructed; otherwise, return 0.
*/
int hfi1_make_ud_req(struct rvt_qp *qp)
@ -271,7 +273,6 @@ int hfi1_make_ud_req(struct rvt_qp *qp)
struct hfi1_pportdata *ppd;
struct hfi1_ibport *ibp;
struct rvt_swqe *wqe;
unsigned long flags;
u32 nwords;
u32 extra_bytes;
u32 bth0;
@ -281,13 +282,12 @@ int hfi1_make_ud_req(struct rvt_qp *qp)
int next_cur;
u8 sc5;
spin_lock_irqsave(&qp->s_lock, flags);
if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_NEXT_SEND_OK)) {
if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND))
goto bail;
/* We are in the error state, flush the work request. */
if (qp->s_last == qp->s_head)
smp_read_barrier_depends(); /* see post_one_send */
if (qp->s_last == ACCESS_ONCE(qp->s_head))
goto bail;
/* If DMAs are in progress, we can't flush immediately. */
if (atomic_read(&priv->s_iowait.sdma_busy)) {
@ -299,7 +299,9 @@ int hfi1_make_ud_req(struct rvt_qp *qp)
goto done;
}
if (qp->s_cur == qp->s_head)
/* see post_one_send() */
smp_read_barrier_depends();
if (qp->s_cur == ACCESS_ONCE(qp->s_head))
goto bail;
wqe = rvt_get_swqe_ptr(qp, qp->s_cur);
@ -317,6 +319,7 @@ int hfi1_make_ud_req(struct rvt_qp *qp)
if (unlikely(!loopback && (lid == ppd->lid ||
(lid == be16_to_cpu(IB_LID_PERMISSIVE) &&
qp->ibqp.qp_type == IB_QPT_GSI)))) {
unsigned long flags;
/*
* If DMAs are in progress, we can't generate
* a completion for the loopback packet since
@ -329,6 +332,7 @@ int hfi1_make_ud_req(struct rvt_qp *qp)
goto bail;
}
qp->s_cur = next_cur;
local_irq_save(flags);
spin_unlock_irqrestore(&qp->s_lock, flags);
ud_loopback(qp, wqe);
spin_lock_irqsave(&qp->s_lock, flags);
@ -408,7 +412,7 @@ int hfi1_make_ud_req(struct rvt_qp *qp)
bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index);
ohdr->bth[0] = cpu_to_be32(bth0);
ohdr->bth[1] = cpu_to_be32(wqe->ud_wr.remote_qpn);
ohdr->bth[2] = cpu_to_be32(mask_psn(qp->s_next_psn++));
ohdr->bth[2] = cpu_to_be32(mask_psn(wqe->psn));
/*
* Qkeys with the high order bit set mean use the
* qkey from the QP context instead of the WR (see 10.2.5).
@ -423,13 +427,9 @@ int hfi1_make_ud_req(struct rvt_qp *qp)
priv->s_hdr->sde = NULL;
done:
ret = 1;
goto unlock;
return 1;
bail:
qp->s_flags &= ~RVT_S_BUSY;
unlock:
spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}

3
drivers/staging/rdma/hfi1/verbs.c
View File

@ -1533,6 +1533,7 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd)
dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send;
dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send;
dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send;
dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr;
dd->verbs_dev.rdi.driver_f.notify_error_qp = notify_error_qp;
dd->verbs_dev.rdi.driver_f.flush_qp_waiters = flush_qp_waiters;
@ -1543,7 +1544,7 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd)
dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = mtu_to_path_mtu;
dd->verbs_dev.rdi.driver_f.check_modify_qp = hfi1_check_modify_qp;
dd->verbs_dev.rdi.driver_f.modify_qp = hfi1_modify_qp;
dd->verbs_dev.rdi.driver_f.check_send_wr = hfi1_check_send_wr;
dd->verbs_dev.rdi.driver_f.check_send_wqe = hfi1_check_send_wqe;
/* completeion queue */
snprintf(dd->verbs_dev.rdi.dparms.cq_name,

2
drivers/staging/rdma/hfi1/verbs.h
View File

@ -427,7 +427,7 @@ int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata);
int hfi1_check_send_wr(struct rvt_qp *qp, struct ib_send_wr *wr);
int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_ib_header *hdr,
int has_grh, struct rvt_qp *qp, u32 bth0);

4
include/rdma/rdma_vt.h
View File

@ -220,6 +220,7 @@ struct rvt_ah {
};
struct rvt_dev_info;
struct rvt_swqe;
struct rvt_driver_provided {
/*
* The work to create port files in /sys/class Infiniband is different
@ -240,6 +241,7 @@ struct rvt_driver_provided {
void (*qp_priv_free)(struct rvt_dev_info *rdi, struct rvt_qp *qp);
void (*notify_qp_reset)(struct rvt_qp *qp);
void (*schedule_send)(struct rvt_qp *qp);
void (*schedule_send_no_lock)(struct rvt_qp *qp);
void (*do_send)(struct rvt_qp *qp);
int (*get_pmtu_from_attr)(struct rvt_dev_info *rdi, struct rvt_qp *qp,
struct ib_qp_attr *attr);
@ -273,7 +275,7 @@ struct rvt_driver_provided {
void (*modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata);
int (*check_send_wr)(struct rvt_qp *qp, struct ib_send_wr *wr);
int (*check_send_wqe)(struct rvt_qp *qp, struct rvt_swqe *wqe);
void (*notify_create_mad_agent)(struct rvt_dev_info *rdi, int port_idx);
void (*notify_free_mad_agent)(struct rvt_dev_info *rdi, int port_idx);

13
include/rdma/rdmavt_qp.h
View File

@ -250,11 +250,12 @@ struct rvt_qp {
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_ahgpsn; /* set to the psn in the copy of the header */
u16 pmtu; /* decoded from path_mtu */
u8 log_pmtu; /* shift for pmtu */
u8 state; /* QP state */
u8 allowed_ops; /* high order bits of allowed opcodes */
u8 qp_access_flags;
@ -299,6 +300,13 @@ struct rvt_qp {
struct rvt_sge_state r_sge; /* current receive data */
struct rvt_rq r_rq; /* receive work queue */
/* post send line */
spinlock_t s_hlock ____cacheline_aligned_in_smp;
u32 s_head; /* new entries added here */
u32 s_next_psn; /* PSN for next request */
u32 s_avail; /* number of entries avail */
u32 s_ssn; /* SSN of tail entry */
spinlock_t s_lock ____cacheline_aligned_in_smp;
struct rvt_sge_state *s_cur_sge;
u32 s_flags;
@ -308,19 +316,16 @@ struct rvt_qp {
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;