summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorAndy Grover <andy.grover@oracle.com>2009-07-17 13:13:33 +0000
committerDavid S. Miller <davem@davemloft.net>2009-07-20 08:03:13 -0700
commita870d62726721785c34fa73d852bd35e5d1b295b (patch)
treebab3e33c8030e296477d4719817dfbe75303f04f
parentedacaeae52ade6cbb3a0704db32a9fb4a219dee3 (diff)
downloadop-kernel-dev-a870d62726721785c34fa73d852bd35e5d1b295b.zip
op-kernel-dev-a870d62726721785c34fa73d852bd35e5d1b295b.tar.gz
RDS/IB: Always use PAGE_SIZE for FMR page size
While FMRs allow significant flexibility in what size of pages they can use, we really just want FMR pages to match CPU page size. Roland says we can count on this always being supported, so this simplifies things. Signed-off-by: Andy Grover <andy.grover@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/rds/ib.c3
-rw-r--r--net/rds/ib.h3
-rw-r--r--net/rds/ib_rdma.c12
3 files changed, 6 insertions, 12 deletions
diff --git a/net/rds/ib.c b/net/rds/ib.c
index 27abdd3..868559a 100644
--- a/net/rds/ib.c
+++ b/net/rds/ib.c
@@ -85,9 +85,6 @@ void rds_ib_add_one(struct ib_device *device)
rds_ibdev->max_wrs = dev_attr->max_qp_wr;
rds_ibdev->max_sge = min(dev_attr->max_sge, RDS_IB_MAX_SGE);
- rds_ibdev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1);
- rds_ibdev->fmr_page_size = 1 << rds_ibdev->fmr_page_shift;
- rds_ibdev->fmr_page_mask = ~((u64) rds_ibdev->fmr_page_size - 1);
rds_ibdev->fmr_max_remaps = dev_attr->max_map_per_fmr?: 32;
rds_ibdev->max_fmrs = dev_attr->max_fmr ?
min_t(unsigned int, dev_attr->max_fmr, fmr_pool_size) :
diff --git a/net/rds/ib.h b/net/rds/ib.h
index c0de7af..1378b85 100644
--- a/net/rds/ib.h
+++ b/net/rds/ib.h
@@ -159,9 +159,6 @@ struct rds_ib_device {
struct ib_pd *pd;
struct ib_mr *mr;
struct rds_ib_mr_pool *mr_pool;
- int fmr_page_shift;
- int fmr_page_size;
- u64 fmr_page_mask;
unsigned int fmr_max_remaps;
unsigned int max_fmrs;
int max_sge;
diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 81033af..ef3ab5b 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -211,7 +211,7 @@ struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_ibdev)
pool->fmr_attr.max_pages = fmr_message_size;
pool->fmr_attr.max_maps = rds_ibdev->fmr_max_remaps;
- pool->fmr_attr.page_shift = rds_ibdev->fmr_page_shift;
+ pool->fmr_attr.page_shift = PAGE_SHIFT;
pool->max_free_pinned = rds_ibdev->max_fmrs * fmr_message_size / 4;
/* We never allow more than max_items MRs to be allocated.
@@ -349,13 +349,13 @@ static int rds_ib_map_fmr(struct rds_ib_device *rds_ibdev, struct rds_ib_mr *ibm
unsigned int dma_len = ib_sg_dma_len(dev, &scat[i]);
u64 dma_addr = ib_sg_dma_address(dev, &scat[i]);
- if (dma_addr & ~rds_ibdev->fmr_page_mask) {
+ if (dma_addr & ~PAGE_MASK) {
if (i > 0)
return -EINVAL;
else
++page_cnt;
}
- if ((dma_addr + dma_len) & ~rds_ibdev->fmr_page_mask) {
+ if ((dma_addr + dma_len) & ~PAGE_MASK) {
if (i < sg_dma_len - 1)
return -EINVAL;
else
@@ -365,7 +365,7 @@ static int rds_ib_map_fmr(struct rds_ib_device *rds_ibdev, struct rds_ib_mr *ibm
len += dma_len;
}
- page_cnt += len >> rds_ibdev->fmr_page_shift;
+ page_cnt += len >> PAGE_SHIFT;
if (page_cnt > fmr_message_size)
return -EINVAL;
@@ -378,9 +378,9 @@ static int rds_ib_map_fmr(struct rds_ib_device *rds_ibdev, struct rds_ib_mr *ibm
unsigned int dma_len = ib_sg_dma_len(dev, &scat[i]);
u64 dma_addr = ib_sg_dma_address(dev, &scat[i]);
- for (j = 0; j < dma_len; j += rds_ibdev->fmr_page_size)
+ for (j = 0; j < dma_len; j += PAGE_SIZE)
dma_pages[page_cnt++] =
- (dma_addr & rds_ibdev->fmr_page_mask) + j;
+ (dma_addr & PAGE_MASK) + j;
}
ret = ib_map_phys_fmr(ibmr->fmr,
OpenPOWER on IntegriCloud