X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Finfiniband%2Fhw%2Fipath%2Fipath_ud.c;h=49f1102af8b36635427459aa52faeb76b2e2afd0;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=e606daf8321064582eb2a5d04a106f2166d2fef5;hpb=16cf0ec7408f389279d413869e94c1a351392f97;p=linux-2.6.git

diff --git a/drivers/infiniband/hw/ipath/ipath_ud.c b/drivers/infiniband/hw/ipath/ipath_ud.c
index e606daf83..49f1102af 100644
--- a/drivers/infiniband/hw/ipath/ipath_ud.c
+++ b/drivers/infiniband/hw/ipath/ipath_ud.c
@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2006 QLogic, Inc. 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
@@ -33,7 +34,52 @@
 #include <rdma/ib_smi.h>
 
 #include "ipath_verbs.h"
-#include "ips_common.h"
+#include "ipath_kernel.h"
+
+static int init_sge(struct ipath_qp *qp, struct ipath_rwqe *wqe,
+		    u32 *lengthp, struct ipath_sge_state *ss)
+{
+	int user = to_ipd(qp->ibqp.pd)->user;
+	int i, j, ret;
+	struct ib_wc wc;
+
+	*lengthp = 0;
+	for (i = j = 0; i < wqe->num_sge; i++) {
+		if (wqe->sg_list[i].length == 0)
+			continue;
+		/* Check LKEY */
+		if ((user && wqe->sg_list[i].lkey == 0) ||
+		    !ipath_lkey_ok(qp, j ? &ss->sg_list[j - 1] : &ss->sge,
+				   &wqe->sg_list[i], IB_ACCESS_LOCAL_WRITE))
+			goto bad_lkey;
+		*lengthp += wqe->sg_list[i].length;
+		j++;
+	}
+	ss->num_sge = j;
+	ret = 1;
+	goto bail;
+
+bad_lkey:
+	wc.wr_id = wqe->wr_id;
+	wc.status = IB_WC_LOC_PROT_ERR;
+	wc.opcode = IB_WC_RECV;
+	wc.vendor_err = 0;
+	wc.byte_len = 0;
+	wc.imm_data = 0;
+	wc.qp_num = qp->ibqp.qp_num;
+	wc.src_qp = 0;
+	wc.wc_flags = 0;
+	wc.pkey_index = 0;
+	wc.slid = 0;
+	wc.sl = 0;
+	wc.dlid_path_bits = 0;
+	wc.port_num = 0;
+	/* Signal solicited completion event. */
+	ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
+	ret = 0;
+bail:
+	return ret;
+}
 
 /**
  * ipath_ud_loopback - handle send on loopback QPs
@@ -45,6 +91,8 @@
  *
  * This is called from ipath_post_ud_send() 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,
@@ -59,7 +107,11 @@ static void ipath_ud_loopback(struct ipath_qp *sqp,
 	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 *);
+	u32 tail;
+	u32 rlen;
 
 	qp = ipath_lookup_qpn(&dev->qp_table, wr->wr.ud.remote_qpn);
 	if (!qp)
@@ -93,6 +145,13 @@ static void ipath_ud_loopback(struct ipath_qp *sqp,
 		wc->imm_data = 0;
 	}
 
+	if (wr->num_sge > 1) {
+		rsge.sg_list = kmalloc((wr->num_sge - 1) *
+					sizeof(struct ipath_sge),
+				       GFP_ATOMIC);
+	} else
+		rsge.sg_list = NULL;
+
 	/*
 	 * 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
@@ -100,37 +159,52 @@ static void ipath_ud_loopback(struct ipath_qp *sqp,
 	 */
 	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;
 	}
+
 	spin_lock_irqsave(&rq->lock, flags);
-	if (rq->tail == rq->head) {
-		spin_unlock_irqrestore(&rq->lock, flags);
-		dev->n_pkt_drops++;
-		goto done;
+	wq = rq->wq;
+	tail = wq->tail;
+	while (1) {
+		if (unlikely(tail == wq->head)) {
+			spin_unlock_irqrestore(&rq->lock, flags);
+			dev->n_pkt_drops++;
+			goto bail_sge;
+		}
+		wqe = get_rwqe_ptr(rq, tail);
+		if (++tail >= rq->size)
+			tail = 0;
+		if (init_sge(qp, wqe, &rlen, &rsge))
+			break;
+		wq->tail = tail;
 	}
 	/* 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 bail_sge;
 	}
+	wq->tail = tail;
 	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 (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;
 
@@ -139,12 +213,12 @@ static void ipath_ud_loopback(struct ipath_qp *sqp,
 			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;
 	if (ah_attr->ah_flags & IB_AH_GRH) {
 		ipath_copy_sge(&rsge, &ah_attr->grh, sizeof(struct ib_grh));
@@ -185,7 +259,7 @@ static void ipath_ud_loopback(struct ipath_qp *sqp,
 	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->slid = dev->dd->ipath_lid |
 		(ah_attr->src_path_bits &
 		 ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1));
 	wc->sl = ah_attr->sl;
@@ -195,6 +269,8 @@ static void ipath_ud_loopback(struct ipath_qp *sqp,
 	ipath_cq_enter(to_icq(qp->ibqp.recv_cq), wc,
 		       wr->send_flags & IB_SEND_SOLICITED);
 
+bail_sge:
+	kfree(rsge.sg_list);
 done:
 	if (atomic_dec_and_test(&qp->refcount))
 		wake_up(&qp->wait);
@@ -265,7 +341,7 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 
 		if (wr->sg_list[i].length == 0)
 			continue;
-		if (!ipath_lkey_ok(&dev->lk_table, ss.num_sge ?
+		if (!ipath_lkey_ok(qp, ss.num_sge ?
 				   sg_list + ss.num_sge - 1 : &ss.sge,
 				   &wr->sg_list[i], 0)) {
 			ret = -EINVAL;
@@ -274,6 +350,11 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 		len += wr->sg_list[i].length;
 		ss.num_sge++;
 	}
+	/* Check for invalid packet size. */
+	if (len > dev->dd->ipath_ibmtu) {
+		ret = -EINVAL;
+		goto bail;
+	}
 	extra_bytes = (4 - len) & 3;
 	nwords = (len + extra_bytes) >> 2;
 
@@ -283,8 +364,8 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 		ret = -EINVAL;
 		goto bail;
 	}
-	if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE) {
-		if (ah_attr->dlid != IPS_PERMISSIVE_LID)
+	if (ah_attr->dlid >= IPATH_MULTICAST_LID_BASE) {
+		if (ah_attr->dlid != IPATH_PERMISSIVE_LID)
 			dev->n_multicast_xmit++;
 		else
 			dev->n_unicast_xmit++;
@@ -292,7 +373,7 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 		dev->n_unicast_xmit++;
 		lid = ah_attr->dlid &
 			~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
-		if (unlikely(lid == ipath_layer_get_lid(dev->dd))) {
+		if (unlikely(lid == dev->dd->ipath_lid)) {
 			/*
 			 * Pass in an uninitialized ib_wc to save stack
 			 * space.
@@ -304,7 +385,7 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 	if (ah_attr->ah_flags & IB_AH_GRH) {
 		/* Header size in 32-bit words. */
 		hwords = 17;
-		lrh0 = IPS_LRH_GRH;
+		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) |
@@ -321,7 +402,7 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 		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);
+			dev->dd->ipath_guid;
 		qp->s_hdr.u.l.grh.dgid = ah_attr->grh.dgid;
 		/*
 		 * Don't worry about sending to locally attached multicast
@@ -330,7 +411,7 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 	} 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) {
@@ -351,7 +432,7 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 	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);
+	lid = dev->dd->ipath_lid;
 	if (lid) {
 		lid |= ah_attr->src_path_bits &
 			((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
@@ -361,18 +442,18 @@ int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr)
 	if (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) :
+	ohdr->bth[1] = ah_attr->dlid >= IPATH_MULTICAST_LID_BASE &&
+		ah_attr->dlid != IPATH_PERMISSIVE_LID ?
+		__constant_cpu_to_be32(IPATH_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[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).
@@ -427,13 +508,9 @@ void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 	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;
 
@@ -452,8 +529,7 @@ void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 		 * 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]);
@@ -463,7 +539,7 @@ void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 			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
@@ -541,56 +617,28 @@ void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 
 	/*
 	 * 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);
-		dev->n_pkt_drops++;
+	if (qp->r_reuse_sge)
+		qp->r_reuse_sge = 0;
+	else if (!ipath_get_rwqe(qp, 0)) {
+		/*
+		 * Count VL15 packets dropped due to no receive buffer.
+		 * Otherwise, count them as buffer overruns since usually,
+		 * the HW will be able to receive packets even if there are
+		 * no QPs with posted receive buffers.
+		 */
+		if (qp->ibqp.qp_num == 0)
+			dev->n_vl15_dropped++;
+		else
+			dev->rcv_errors++;
 		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_reuse_sge = 1;
 		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));
@@ -599,6 +647,7 @@ void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 		ipath_skip_sge(&qp->r_sge, sizeof(struct ib_grh));
 	ipath_copy_sge(&qp->r_sge, data,
 		       wc.byte_len - sizeof(struct ib_grh));
+	wc.wr_id = qp->r_wr_id;
 	wc.status = IB_WC_SUCCESS;
 	wc.opcode = IB_WC_RECV;
 	wc.vendor_err = 0;
@@ -612,7 +661,7 @@ void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
 	/*
 	 * Save the LMC lower bits if the destination LID is a unicast LID.
 	 */
-	wc.dlid_path_bits = dlid >= IPS_MULTICAST_LID_BASE ? 0 :
+	wc.dlid_path_bits = dlid >= IPATH_MULTICAST_LID_BASE ? 0 :
 		dlid & ((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
 	/* Signal completion event if the solicited bit is set. */
 	ipath_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,