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| author | Jack Morgenstein | 2007-08-01 11:28:53 +0200 |
|---|---|---|
| committer | Roland Dreier | 2007-10-10 04:59:16 +0200 |
| commit | d7bb58fb1c0e7264a7261c7d0304121ef9402e94 (patch) | |
| tree | aefbae7ee4b4b84022a7646372ddfcdb0a99e72f /drivers/net/mlx4/main.c | |
| parent | mlx4_core: Fix meaning of dev->caps.reserved_mtts (diff) | |
| download | kernel-qcow2-linux-d7bb58fb1c0e7264a7261c7d0304121ef9402e94.tar.gz kernel-qcow2-linux-d7bb58fb1c0e7264a7261c7d0304121ef9402e94.tar.xz kernel-qcow2-linux-d7bb58fb1c0e7264a7261c7d0304121ef9402e94.zip | |
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/net/mlx4/main.c')
| -rw-r--r-- | drivers/net/mlx4/main.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c index ed7e8d76cde0..478b3ba74edc 100644 --- a/drivers/net/mlx4/main.c +++ b/drivers/net/mlx4/main.c @@ -300,6 +300,17 @@ static int __devinit mlx4_init_icm(struct mlx4_dev *dev, goto err_unmap_cmpt; } + /* + * Reserved MTT entries must be aligned up to a cacheline + * boundary, since the FW will write to them, while the driver + * writes to all other MTT entries. (The variable + * dev->caps.mtt_entry_sz below is really the MTT segment + * size, not the raw entry size) + */ + dev->caps.reserved_mtts = + ALIGN(dev->caps.reserved_mtts * dev->caps.mtt_entry_sz, + dma_get_cache_alignment()) / dev->caps.mtt_entry_sz; + err = mlx4_init_icm_table(dev, &priv->mr_table.mtt_table, init_hca->mtt_base, dev->caps.mtt_entry_sz, |