X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Finfiniband%2Fhw%2Fipath%2Fipath_keys.c;h=a5ca279370aa2a34004cf3ea3f88043985987b10;hb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;hp=5ae8761f9dd2e8b3ed5dc86430ac9617c251aab9;hpb=4e76c8a9fa413ccc09d3f7f664183dcce3555d57;p=linux-2.6.git

diff --git a/drivers/infiniband/hw/ipath/ipath_keys.c b/drivers/infiniband/hw/ipath/ipath_keys.c
index 5ae8761f9..a5ca27937 100644
--- a/drivers/infiniband/hw/ipath/ipath_keys.c
+++ b/drivers/infiniband/hw/ipath/ipath_keys.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
@@ -120,6 +121,7 @@ int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge,
 		  struct ib_sge *sge, int acc)
 {
 	struct ipath_mregion *mr;
+	unsigned n, m;
 	size_t off;
 	int ret;
 
@@ -151,20 +153,22 @@ int ipath_lkey_ok(struct ipath_lkey_table *rkt, struct ipath_sge *isge,
 	}
 
 	off += mr->offset;
-	isge->mr = mr;
-	isge->m = 0;
-	isge->n = 0;
-	while (off >= mr->map[isge->m]->segs[isge->n].length) {
-		off -= mr->map[isge->m]->segs[isge->n].length;
-		isge->n++;
-		if (isge->n >= IPATH_SEGSZ) {
-			isge->m++;
-			isge->n = 0;
+	m = 0;
+	n = 0;
+	while (off >= mr->map[m]->segs[n].length) {
+		off -= mr->map[m]->segs[n].length;
+		n++;
+		if (n >= IPATH_SEGSZ) {
+			m++;
+			n = 0;
 		}
 	}
-	isge->vaddr = mr->map[isge->m]->segs[isge->n].vaddr + off;
-	isge->length = mr->map[isge->m]->segs[isge->n].length - off;
+	isge->mr = mr;
+	isge->vaddr = mr->map[m]->segs[n].vaddr + off;
+	isge->length = mr->map[m]->segs[n].length - off;
 	isge->sge_length = sge->length;
+	isge->m = m;
+	isge->n = n;
 
 	ret = 1;
 
@@ -189,9 +193,25 @@ int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss,
 	struct ipath_lkey_table *rkt = &dev->lk_table;
 	struct ipath_sge *sge = &ss->sge;
 	struct ipath_mregion *mr;
+	unsigned n, m;
 	size_t off;
 	int ret;
 
+	/*
+	 * We use RKEY == zero for physical addresses
+	 * (see ipath_get_dma_mr).
+	 */
+	if (rkey == 0) {
+		sge->mr = NULL;
+		sge->vaddr = phys_to_virt(vaddr);
+		sge->length = len;
+		sge->sge_length = len;
+		ss->sg_list = NULL;
+		ss->num_sge = 1;
+		ret = 1;
+		goto bail;
+	}
+
 	mr = rkt->table[(rkey >> (32 - ib_ipath_lkey_table_size))];
 	if (unlikely(mr == NULL || mr->lkey != rkey)) {
 		ret = 0;
@@ -206,20 +226,22 @@ int ipath_rkey_ok(struct ipath_ibdev *dev, struct ipath_sge_state *ss,
 	}
 
 	off += mr->offset;
-	sge->mr = mr;
-	sge->m = 0;
-	sge->n = 0;
-	while (off >= mr->map[sge->m]->segs[sge->n].length) {
-		off -= mr->map[sge->m]->segs[sge->n].length;
-		sge->n++;
-		if (sge->n >= IPATH_SEGSZ) {
-			sge->m++;
-			sge->n = 0;
+	m = 0;
+	n = 0;
+	while (off >= mr->map[m]->segs[n].length) {
+		off -= mr->map[m]->segs[n].length;
+		n++;
+		if (n >= IPATH_SEGSZ) {
+			m++;
+			n = 0;
 		}
 	}
-	sge->vaddr = mr->map[sge->m]->segs[sge->n].vaddr + off;
-	sge->length = mr->map[sge->m]->segs[sge->n].length - off;
+	sge->mr = mr;
+	sge->vaddr = mr->map[m]->segs[n].vaddr + off;
+	sge->length = mr->map[m]->segs[n].length - off;
 	sge->sge_length = len;
+	sge->m = m;
+	sge->n = n;
 	ss->sg_list = NULL;
 	ss->num_sge = 1;