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authorJack Morgenstein <jackm@dev.mellanox.co.il>2007-08-01 12:28:53 +0300
committerRoland Dreier <rolandd@cisco.com>2007-10-09 19:59:16 -0700
commitd7bb58fb1c0e7264a7261c7d0304121ef9402e94 (patch)
treeaefbae7ee4b4b84022a7646372ddfcdb0a99e72f /drivers/infiniband
parent121964ec38d3e17b5ea6183b3c0571df2f4b0eb6 (diff)
mlx4_core: Write MTTs from CPU instead with of WRITE_MTT FW command
Write MTT entries directly to ICM from the driver (eliminating use of WRITE_MTT command). This reduces the number of FW commands needed to register an MR by at least a factor of 2 and speeds up memory registration significantly. This code will also be used to implement FMRs. Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mlx4/mr.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
index 85ae906f1d1..734ec2bd15c 100644
--- a/drivers/infiniband/hw/mlx4/mr.c
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -96,11 +96,10 @@ int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
pages[i++] = sg_dma_address(&chunk->page_list[j]) +
umem->page_size * k;
/*
- * Be friendly to WRITE_MTT firmware
- * command, and pass it chunks of
- * appropriate size.
+ * Be friendly to mlx4_write_mtt() and
+ * pass it chunks of appropriate size.
*/
- if (i == PAGE_SIZE / sizeof (u64) - 2) {
+ if (i == PAGE_SIZE / sizeof (u64)) {
err = mlx4_write_mtt(dev->dev, mtt, n,
i, pages);
if (err)