/*
- * Copyright (c) 2006 QLogic, Inc. All rights reserved.
+ * Copyright (c) 2006, 2007, 2008 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
* SOFTWARE.
*/
+#include <linux/sched.h>
#include <rdma/ib_smi.h>
#include "ipath_verbs.h"
-#include "ips_common.h"
+#include "ipath_kernel.h"
/**
* ipath_ud_loopback - handle send on loopback QPs
- * @sqp: the QP
- * @ss: the SGE state
- * @length: the length of the data to send
- * @wr: the work request
- * @wc: the work completion entry
+ * @sqp: the sending QP
+ * @swqe: the send work request
*
- * This is called from ipath_post_ud_send() to forward a WQE addressed
+ * This is called from ipath_make_ud_req() to forward a WQE addressed
* to the same HCA.
+ * Note that the receive interrupt handler may be calling ipath_ud_rcv()
+ * while this is being called.
*/
-static void ipath_ud_loopback(struct ipath_qp *sqp,
- struct ipath_sge_state *ss,
- u32 length, struct ib_send_wr *wr,
- struct ib_wc *wc)
+static void ipath_ud_loopback(struct ipath_qp *sqp, struct ipath_swqe *swqe)
{
struct ipath_ibdev *dev = to_idev(sqp->ibqp.device);
struct ipath_qp *qp;
struct ipath_srq *srq;
struct ipath_sge_state rsge;
struct ipath_sge *sge;
+ struct ipath_rwq *wq;
struct ipath_rwqe *wqe;
+ void (*handler)(struct ib_event *, void *);
+ struct ib_wc wc;
+ u32 tail;
+ u32 rlen;
+ u32 length;
- qp = ipath_lookup_qpn(&dev->qp_table, wr->wr.ud.remote_qpn);
- if (!qp)
- return;
+ qp = ipath_lookup_qpn(&dev->qp_table, swqe->wr.wr.ud.remote_qpn);
+ if (!qp || !(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) {
+ dev->n_pkt_drops++;
+ goto done;
+ }
/*
* Check that the qkey matches (except for QP0, see 9.6.1.4.1).
* qkey from the QP context instead of the WR (see 10.2.5).
*/
if (unlikely(qp->ibqp.qp_num &&
- ((int) wr->wr.ud.remote_qkey < 0
- ? qp->qkey : wr->wr.ud.remote_qkey) != qp->qkey)) {
+ ((int) swqe->wr.wr.ud.remote_qkey < 0 ?
+ sqp->qkey : swqe->wr.wr.ud.remote_qkey) != qp->qkey)) {
/* XXX OK to lose a count once in a while. */
dev->qkey_violations++;
dev->n_pkt_drops++;
- goto done;
+ goto drop;
}
/*
* A GRH is expected to preceed the data even if not
* present on the wire.
*/
- wc->byte_len = length + sizeof(struct ib_grh);
+ length = swqe->length;
+ memset(&wc, 0, sizeof wc);
+ wc.byte_len = length + sizeof(struct ib_grh);
- if (wr->opcode == IB_WR_SEND_WITH_IMM) {
- wc->wc_flags = IB_WC_WITH_IMM;
- wc->imm_data = wr->imm_data;
- } else {
- wc->wc_flags = 0;
- wc->imm_data = 0;
+ if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) {
+ wc.wc_flags = IB_WC_WITH_IMM;
+ wc.ex.imm_data = swqe->wr.ex.imm_data;
}
/*
- * Get the next work request entry to find where to put the data.
- * Note that it is safe to drop the lock after changing rq->tail
- * since ipath_post_receive() won't fill the empty slot.
+ * This would be a lot simpler if we could call ipath_get_rwqe()
+ * but that uses state that the receive interrupt handler uses
+ * so we would need to lock out receive interrupts while doing
+ * local loopback.
*/
if (qp->ibqp.srq) {
srq = to_isrq(qp->ibqp.srq);
+ handler = srq->ibsrq.event_handler;
rq = &srq->rq;
} else {
srq = NULL;
+ handler = NULL;
rq = &qp->r_rq;
}
+
+ /*
+ * Get the next work request entry to find where to put the data.
+ * Note that it is safe to drop the lock after changing rq->tail
+ * since ipath_post_receive() won't fill the empty slot.
+ */
spin_lock_irqsave(&rq->lock, flags);
- if (rq->tail == rq->head) {
+ wq = rq->wq;
+ tail = wq->tail;
+ /* Validate tail before using it since it is user writable. */
+ if (tail >= rq->size)
+ tail = 0;
+ if (unlikely(tail == wq->head)) {
spin_unlock_irqrestore(&rq->lock, flags);
dev->n_pkt_drops++;
- goto done;
+ goto drop;
+ }
+ wqe = get_rwqe_ptr(rq, tail);
+ rsge.sg_list = qp->r_ud_sg_list;
+ if (!ipath_init_sge(qp, wqe, &rlen, &rsge)) {
+ spin_unlock_irqrestore(&rq->lock, flags);
+ dev->n_pkt_drops++;
+ goto drop;
}
/* Silently drop packets which are too big. */
- wqe = get_rwqe_ptr(rq, rq->tail);
- if (wc->byte_len > wqe->length) {
+ if (wc.byte_len > rlen) {
spin_unlock_irqrestore(&rq->lock, flags);
dev->n_pkt_drops++;
- goto done;
+ goto drop;
}
- wc->wr_id = wqe->wr_id;
- rsge.sge = wqe->sg_list[0];
- rsge.sg_list = wqe->sg_list + 1;
- rsge.num_sge = wqe->num_sge;
- if (++rq->tail >= rq->size)
- rq->tail = 0;
- if (srq && srq->ibsrq.event_handler) {
+ if (++tail >= rq->size)
+ tail = 0;
+ wq->tail = tail;
+ wc.wr_id = wqe->wr_id;
+ if (handler) {
u32 n;
- if (rq->head < rq->tail)
- n = rq->size + rq->head - rq->tail;
+ /*
+ * validate head pointer value and compute
+ * the number of remaining WQEs.
+ */
+ n = wq->head;
+ if (n >= rq->size)
+ n = 0;
+ if (n < tail)
+ n += rq->size - tail;
else
- n = rq->head - rq->tail;
+ n -= tail;
if (n < srq->limit) {
struct ib_event ev;
ev.device = qp->ibqp.device;
ev.element.srq = qp->ibqp.srq;
ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
- srq->ibsrq.event_handler(&ev,
- srq->ibsrq.srq_context);
+ handler(&ev, srq->ibsrq.srq_context);
} else
spin_unlock_irqrestore(&rq->lock, flags);
} else
spin_unlock_irqrestore(&rq->lock, flags);
- ah_attr = &to_iah(wr->wr.ud.ah)->attr;
+
+ ah_attr = &to_iah(swqe->wr.wr.ud.ah)->attr;
if (ah_attr->ah_flags & IB_AH_GRH) {
ipath_copy_sge(&rsge, &ah_attr->grh, sizeof(struct ib_grh));
- wc->wc_flags |= IB_WC_GRH;
+ wc.wc_flags |= IB_WC_GRH;
} else
ipath_skip_sge(&rsge, sizeof(struct ib_grh));
- sge = &ss->sge;
+ sge = swqe->sg_list;
while (length) {
u32 len = sge->length;
if (len > length)
len = length;
+ if (len > sge->sge_length)
+ len = sge->sge_length;
BUG_ON(len == 0);
ipath_copy_sge(&rsge, sge->vaddr, len);
sge->vaddr += len;
sge->length -= len;
sge->sge_length -= len;
if (sge->sge_length == 0) {
- if (--ss->num_sge)
- *sge = *ss->sg_list++;
+ if (--swqe->wr.num_sge)
+ sge++;
} else if (sge->length == 0 && sge->mr != NULL) {
if (++sge->n >= IPATH_SEGSZ) {
if (++sge->m >= sge->mr->mapsz)
}
length -= len;
}
- wc->status = IB_WC_SUCCESS;
- wc->opcode = IB_WC_RECV;
- wc->vendor_err = 0;
- wc->qp_num = qp->ibqp.qp_num;
- wc->src_qp = sqp->ibqp.qp_num;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = IB_WC_RECV;
+ wc.qp = &qp->ibqp;
+ wc.src_qp = sqp->ibqp.qp_num;
/* XXX do we know which pkey matched? Only needed for GSI. */
- wc->pkey_index = 0;
- wc->slid = ipath_layer_get_lid(dev->dd) |
+ wc.pkey_index = 0;
+ wc.slid = dev->dd->ipath_lid |
(ah_attr->src_path_bits &
- ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1));
- wc->sl = ah_attr->sl;
- wc->dlid_path_bits =
- ah_attr->dlid & ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ ((1 << dev->dd->ipath_lmc) - 1));
+ wc.sl = ah_attr->sl;
+ wc.dlid_path_bits =
+ ah_attr->dlid & ((1 << dev->dd->ipath_lmc) - 1);
+ wc.port_num = 1;
/* Signal completion event if the solicited bit is set. */
- ipath_cq_enter(to_icq(qp->ibqp.recv_cq), wc,
- wr->send_flags & IB_SEND_SOLICITED);
-
-done:
+ ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ swqe->wr.send_flags & IB_SEND_SOLICITED);
+drop:
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
+done:;
}
/**
- * ipath_post_ud_send - post a UD send on QP
+ * ipath_make_ud_req - construct a UD request packet
* @qp: the QP
- * @wr: the work request
*
- * Note that we actually send the data as it is posted instead of putting
- * the request into a ring buffer. If we wanted to use a ring buffer,
- * we would need to save a reference to the destination address in the SWQE.
+ * Return 1 if constructed; otherwise, return 0.
*/
-int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
+int ipath_make_ud_req(struct ipath_qp *qp)
{
struct ipath_ibdev *dev = to_idev(qp->ibqp.device);
struct ipath_other_headers *ohdr;
struct ib_ah_attr *ah_attr;
- struct ipath_sge_state ss;
- struct ipath_sge *sg_list;
- struct ib_wc wc;
- u32 hwords;
+ struct ipath_swqe *wqe;
+ unsigned long flags;
u32 nwords;
- u32 len;
u32 extra_bytes;
u32 bth0;
u16 lrh0;
u16 lid;
- int i;
- int ret;
+ int ret = 0;
+ int next_cur;
- if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK)) {
- ret = 0;
- goto bail;
- }
+ spin_lock_irqsave(&qp->s_lock, flags);
- /* IB spec says that num_sge == 0 is OK. */
- if (wr->num_sge > qp->s_max_sge) {
- ret = -EINVAL;
- goto bail;
- }
-
- if (wr->num_sge > 1) {
- sg_list = kmalloc((qp->s_max_sge - 1) * sizeof(*sg_list),
- GFP_ATOMIC);
- if (!sg_list) {
- ret = -ENOMEM;
+ if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_NEXT_SEND_OK)) {
+ if (!(ib_ipath_state_ops[qp->state] & IPATH_FLUSH_SEND))
goto bail;
- }
- } else
- sg_list = NULL;
-
- /* Check the buffer to send. */
- ss.sg_list = sg_list;
- ss.sge.mr = NULL;
- ss.sge.vaddr = NULL;
- ss.sge.length = 0;
- ss.sge.sge_length = 0;
- ss.num_sge = 0;
- len = 0;
- for (i = 0; i < wr->num_sge; i++) {
- /* Check LKEY */
- if (to_ipd(qp->ibqp.pd)->user && wr->sg_list[i].lkey == 0) {
- ret = -EINVAL;
+ /* We are in the error state, flush the work request. */
+ if (qp->s_last == qp->s_head)
goto bail;
- }
-
- if (wr->sg_list[i].length == 0)
- continue;
- if (!ipath_lkey_ok(&dev->lk_table, ss.num_sge ?
- sg_list + ss.num_sge - 1 : &ss.sge,
- &wr->sg_list[i], 0)) {
- ret = -EINVAL;
+ /* If DMAs are in progress, we can't flush immediately. */
+ if (atomic_read(&qp->s_dma_busy)) {
+ qp->s_flags |= IPATH_S_WAIT_DMA;
goto bail;
}
- len += wr->sg_list[i].length;
- ss.num_sge++;
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ ipath_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR);
+ goto done;
}
- /* Check for invalid packet size. */
- if (len > ipath_layer_get_ibmtu(dev->dd)) {
- ret = -EINVAL;
+
+ if (qp->s_cur == qp->s_head)
goto bail;
- }
- extra_bytes = (4 - len) & 3;
- nwords = (len + extra_bytes) >> 2;
+
+ wqe = get_swqe_ptr(qp, qp->s_cur);
+ next_cur = qp->s_cur + 1;
+ if (next_cur >= qp->s_size)
+ next_cur = 0;
/* Construct the header. */
- ah_attr = &to_iah(wr->wr.ud.ah)->attr;
- if (ah_attr->dlid == 0) {
- ret = -EINVAL;
- goto bail;
- }
- if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE) {
- if (ah_attr->dlid != IPS_PERMISSIVE_LID)
+ ah_attr = &to_iah(wqe->wr.wr.ud.ah)->attr;
+ if (ah_attr->dlid >= IPATH_MULTICAST_LID_BASE) {
+ if (ah_attr->dlid != IPATH_PERMISSIVE_LID)
dev->n_multicast_xmit++;
else
dev->n_unicast_xmit++;
} else {
dev->n_unicast_xmit++;
- lid = ah_attr->dlid &
- ~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
- if (unlikely(lid == ipath_layer_get_lid(dev->dd))) {
+ lid = ah_attr->dlid & ~((1 << dev->dd->ipath_lmc) - 1);
+ if (unlikely(lid == dev->dd->ipath_lid)) {
/*
- * Pass in an uninitialized ib_wc to save stack
- * space.
+ * If DMAs are in progress, we can't generate
+ * a completion for the loopback packet since
+ * it would be out of order.
+ * XXX Instead of waiting, we could queue a
+ * zero length descriptor so we get a callback.
*/
- ipath_ud_loopback(qp, &ss, len, wr, &wc);
+ if (atomic_read(&qp->s_dma_busy)) {
+ qp->s_flags |= IPATH_S_WAIT_DMA;
+ goto bail;
+ }
+ qp->s_cur = next_cur;
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ ipath_ud_loopback(qp, wqe);
+ spin_lock_irqsave(&qp->s_lock, flags);
+ ipath_send_complete(qp, wqe, IB_WC_SUCCESS);
goto done;
}
}
+
+ qp->s_cur = next_cur;
+ extra_bytes = -wqe->length & 3;
+ nwords = (wqe->length + extra_bytes) >> 2;
+
+ /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */
+ qp->s_hdrwords = 7;
+ qp->s_cur_size = wqe->length;
+ qp->s_cur_sge = &qp->s_sge;
+ qp->s_dmult = ah_attr->static_rate;
+ qp->s_wqe = wqe;
+ 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;
+
if (ah_attr->ah_flags & IB_AH_GRH) {
/* Header size in 32-bit words. */
- hwords = 17;
- lrh0 = IPS_LRH_GRH;
+ qp->s_hdrwords += ipath_make_grh(dev, &qp->s_hdr.u.l.grh,
+ &ah_attr->grh,
+ qp->s_hdrwords, nwords);
+ lrh0 = IPATH_LRH_GRH;
ohdr = &qp->s_hdr.u.l.oth;
- qp->s_hdr.u.l.grh.version_tclass_flow =
- cpu_to_be32((6 << 28) |
- (ah_attr->grh.traffic_class << 20) |
- ah_attr->grh.flow_label);
- qp->s_hdr.u.l.grh.paylen =
- cpu_to_be16(((wr->opcode ==
- IB_WR_SEND_WITH_IMM ? 6 : 5) +
- nwords + SIZE_OF_CRC) << 2);
- /* next_hdr is defined by C8-7 in ch. 8.4.1 */
- qp->s_hdr.u.l.grh.next_hdr = 0x1B;
- qp->s_hdr.u.l.grh.hop_limit = ah_attr->grh.hop_limit;
- /* The SGID is 32-bit aligned. */
- qp->s_hdr.u.l.grh.sgid.global.subnet_prefix =
- dev->gid_prefix;
- qp->s_hdr.u.l.grh.sgid.global.interface_id =
- ipath_layer_get_guid(dev->dd);
- qp->s_hdr.u.l.grh.dgid = ah_attr->grh.dgid;
/*
* Don't worry about sending to locally attached multicast
* QPs. It is unspecified by the spec. what happens.
*/
} else {
/* Header size in 32-bit words. */
- hwords = 7;
- lrh0 = IPS_LRH_BTH;
+ lrh0 = IPATH_LRH_BTH;
ohdr = &qp->s_hdr.u.oth;
}
- if (wr->opcode == IB_WR_SEND_WITH_IMM) {
- ohdr->u.ud.imm_data = wr->imm_data;
- wc.imm_data = wr->imm_data;
- hwords += 1;
+ if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) {
+ qp->s_hdrwords++;
+ ohdr->u.ud.imm_data = wqe->wr.ex.imm_data;
bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24;
- } else if (wr->opcode == IB_WR_SEND) {
- wc.imm_data = 0;
+ } else
bth0 = IB_OPCODE_UD_SEND_ONLY << 24;
- } else {
- ret = -EINVAL;
- goto bail;
- }
lrh0 |= ah_attr->sl << 4;
if (qp->ibqp.qp_type == IB_QPT_SMI)
lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */
qp->s_hdr.lrh[0] = cpu_to_be16(lrh0);
qp->s_hdr.lrh[1] = cpu_to_be16(ah_attr->dlid); /* DEST LID */
- qp->s_hdr.lrh[2] = cpu_to_be16(hwords + nwords + SIZE_OF_CRC);
- lid = ipath_layer_get_lid(dev->dd);
+ qp->s_hdr.lrh[2] = cpu_to_be16(qp->s_hdrwords + nwords +
+ SIZE_OF_CRC);
+ lid = dev->dd->ipath_lid;
if (lid) {
lid |= ah_attr->src_path_bits &
- ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ ((1 << dev->dd->ipath_lmc) - 1);
qp->s_hdr.lrh[3] = cpu_to_be16(lid);
} else
qp->s_hdr.lrh[3] = IB_LID_PERMISSIVE;
- if (wr->send_flags & IB_SEND_SOLICITED)
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
bth0 |= 1 << 23;
bth0 |= extra_bytes << 20;
- bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? IPS_DEFAULT_P_KEY :
- ipath_layer_get_pkey(dev->dd, qp->s_pkey_index);
+ bth0 |= qp->ibqp.qp_type == IB_QPT_SMI ? IPATH_DEFAULT_P_KEY :
+ ipath_get_pkey(dev->dd, qp->s_pkey_index);
ohdr->bth[0] = cpu_to_be32(bth0);
/*
* Use the multicast QP if the destination LID is a multicast LID.
*/
- ohdr->bth[1] = ah_attr->dlid >= IPS_MULTICAST_LID_BASE &&
- ah_attr->dlid != IPS_PERMISSIVE_LID ?
- __constant_cpu_to_be32(IPS_MULTICAST_QPN) :
- cpu_to_be32(wr->wr.ud.remote_qpn);
- /* XXX Could lose a PSN count but not worth locking */
- ohdr->bth[2] = cpu_to_be32(qp->s_next_psn++ & IPS_PSN_MASK);
+ ohdr->bth[1] = ah_attr->dlid >= IPATH_MULTICAST_LID_BASE &&
+ ah_attr->dlid != IPATH_PERMISSIVE_LID ?
+ cpu_to_be32(IPATH_MULTICAST_QPN) :
+ cpu_to_be32(wqe->wr.wr.ud.remote_qpn);
+ ohdr->bth[2] = cpu_to_be32(qp->s_next_psn++ & IPATH_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).
*/
- ohdr->u.ud.deth[0] = cpu_to_be32((int)wr->wr.ud.remote_qkey < 0 ?
- qp->qkey : wr->wr.ud.remote_qkey);
+ ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->wr.wr.ud.remote_qkey < 0 ?
+ qp->qkey : wqe->wr.wr.ud.remote_qkey);
ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num);
- if (ipath_verbs_send(dev->dd, hwords, (u32 *) &qp->s_hdr,
- len, &ss))
- dev->n_no_piobuf++;
done:
- /* Queue the completion status entry. */
- if (!test_bit(IPATH_S_SIGNAL_REQ_WR, &qp->s_flags) ||
- (wr->send_flags & IB_SEND_SIGNALED)) {
- wc.wr_id = wr->wr_id;
- wc.status = IB_WC_SUCCESS;
- wc.vendor_err = 0;
- wc.opcode = IB_WC_SEND;
- wc.byte_len = len;
- wc.qp_num = qp->ibqp.qp_num;
- wc.src_qp = 0;
- wc.wc_flags = 0;
- /* XXX initialize other fields? */
- ipath_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
- }
- kfree(sg_list);
-
- ret = 0;
+ ret = 1;
+ goto unlock;
bail:
+ qp->s_flags &= ~IPATH_S_BUSY;
+unlock:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
return ret;
}
int opcode;
u32 hdrsize;
u32 pad;
- unsigned long flags;
struct ib_wc wc;
u32 qkey;
u32 src_qp;
- struct ipath_rq *rq;
- struct ipath_srq *srq;
- struct ipath_rwqe *wqe;
u16 dlid;
int header_in_data;
* the eager header buffer size to 56 bytes so the last 12
* bytes of the IB header is in the data buffer.
*/
- header_in_data =
- ipath_layer_get_rcvhdrentsize(dev->dd) == 16;
+ header_in_data = dev->dd->ipath_rcvhdrentsize == 16;
if (header_in_data) {
qkey = be32_to_cpu(((__be32 *) data)[1]);
src_qp = be32_to_cpu(((__be32 *) data)[2]);
src_qp = be32_to_cpu(ohdr->u.ud.deth[1]);
}
}
- src_qp &= IPS_QPN_MASK;
+ src_qp &= IPATH_QPN_MASK;
/*
* Check that the permissive LID is only used on QP0
}
}
+ /*
+ * The opcode is in the low byte when its in network order
+ * (top byte when in host order).
+ */
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+ if (qp->ibqp.qp_num > 1 &&
+ opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) {
+ if (header_in_data) {
+ wc.ex.imm_data = *(__be32 *) data;
+ data += sizeof(__be32);
+ } else
+ wc.ex.imm_data = ohdr->u.ud.imm_data;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ hdrsize += sizeof(u32);
+ } else if (opcode == IB_OPCODE_UD_SEND_ONLY) {
+ wc.ex.imm_data = 0;
+ wc.wc_flags = 0;
+ } else {
+ dev->n_pkt_drops++;
+ goto bail;
+ }
+
/* Get the number of bytes the message was padded by. */
pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
if (unlikely(tlen < (hdrsize + pad + 4))) {
wc.byte_len = tlen + sizeof(struct ib_grh);
/*
- * The opcode is in the low byte when its in network order
- * (top byte when in host order).
- */
- opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
- if (qp->ibqp.qp_num > 1 &&
- opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) {
- if (header_in_data) {
- wc.imm_data = *(__be32 *) data;
- data += sizeof(__be32);
- } else
- wc.imm_data = ohdr->u.ud.imm_data;
- wc.wc_flags = IB_WC_WITH_IMM;
- hdrsize += sizeof(u32);
- } else if (opcode == IB_OPCODE_UD_SEND_ONLY) {
- wc.imm_data = 0;
- wc.wc_flags = 0;
- } else {
- dev->n_pkt_drops++;
- goto bail;
- }
-
- /*
* Get the next work request entry to find where to put the data.
- * Note that it is safe to drop the lock after changing rq->tail
- * since ipath_post_receive() won't fill the empty slot.
*/
- if (qp->ibqp.srq) {
- srq = to_isrq(qp->ibqp.srq);
- rq = &srq->rq;
- } else {
- srq = NULL;
- rq = &qp->r_rq;
- }
- spin_lock_irqsave(&rq->lock, flags);
- if (rq->tail == rq->head) {
- spin_unlock_irqrestore(&rq->lock, flags);
+ if (qp->r_flags & IPATH_R_REUSE_SGE)
+ qp->r_flags &= ~IPATH_R_REUSE_SGE;
+ else if (!ipath_get_rwqe(qp, 0)) {
/*
* Count VL15 packets dropped due to no receive buffer.
* Otherwise, count them as buffer overruns since usually,
goto bail;
}
/* Silently drop packets which are too big. */
- wqe = get_rwqe_ptr(rq, rq->tail);
- if (wc.byte_len > wqe->length) {
- spin_unlock_irqrestore(&rq->lock, flags);
+ if (wc.byte_len > qp->r_len) {
+ qp->r_flags |= IPATH_R_REUSE_SGE;
dev->n_pkt_drops++;
goto bail;
}
- wc.wr_id = wqe->wr_id;
- qp->r_sge.sge = wqe->sg_list[0];
- qp->r_sge.sg_list = wqe->sg_list + 1;
- qp->r_sge.num_sge = wqe->num_sge;
- if (++rq->tail >= rq->size)
- rq->tail = 0;
- if (srq && srq->ibsrq.event_handler) {
- u32 n;
-
- if (rq->head < rq->tail)
- n = rq->size + rq->head - rq->tail;
- else
- n = rq->head - rq->tail;
- if (n < srq->limit) {
- struct ib_event ev;
-
- srq->limit = 0;
- spin_unlock_irqrestore(&rq->lock, flags);
- ev.device = qp->ibqp.device;
- ev.element.srq = qp->ibqp.srq;
- ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
- srq->ibsrq.event_handler(&ev,
- srq->ibsrq.srq_context);
- } else
- spin_unlock_irqrestore(&rq->lock, flags);
- } else
- spin_unlock_irqrestore(&rq->lock, flags);
if (has_grh) {
ipath_copy_sge(&qp->r_sge, &hdr->u.l.grh,
sizeof(struct ib_grh));
ipath_skip_sge(&qp->r_sge, sizeof(struct ib_grh));
ipath_copy_sge(&qp->r_sge, data,
wc.byte_len - sizeof(struct ib_grh));
+ if (!test_and_clear_bit(IPATH_R_WRID_VALID, &qp->r_aflags))
+ goto bail;
+ wc.wr_id = qp->r_wr_id;
wc.status = IB_WC_SUCCESS;
wc.opcode = IB_WC_RECV;
wc.vendor_err = 0;
- wc.qp_num = qp->ibqp.qp_num;
+ wc.qp = &qp->ibqp;
wc.src_qp = src_qp;
/* XXX do we know which pkey matched? Only needed for GSI. */
wc.pkey_index = 0;
/*
* Save the LMC lower bits if the destination LID is a unicast LID.
*/
- wc.dlid_path_bits = dlid >= IPS_MULTICAST_LID_BASE ? 0 :
- dlid & ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
+ wc.dlid_path_bits = dlid >= IPATH_MULTICAST_LID_BASE ? 0 :
+ dlid & ((1 << dev->dd->ipath_lmc) - 1);
+ wc.port_num = 1;
/* Signal completion event if the solicited bit is set. */
ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
(ohdr->bth[0] &
- __constant_cpu_to_be32(1 << 23)) != 0);
+ cpu_to_be32(1 << 23)) != 0);
bail:;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff