diff options
| author | Vladimir Sokolovsky <vlad@mellanox.co.il> | 2008-07-14 23:48:53 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-07-14 23:48:53 -0700 |
| commit | 2d92865158d0e21ef4350703af64bc2a610d81d3 (patch) | |
| tree | 8b11b29982ccff35bc6810e5a57c568ce1a4ada0 /drivers/net/mlx4/fw.h | |
| parent | de910bd92137005b5e1ecaf2ce68053d7d7d5350 (diff) | |
| download | linux-2d92865158d0e21ef4350703af64bc2a610d81d3.tar.bz2 | |
mlx4_core: Use MOD_STAT_CFG command to get minimal page size
There was a bug in some versions of the mlx4 driver in
mlx4_alloc_fmr(), which hardcoded the minimum acceptable page_shift to
be 12. However, new ConnectX firmware can support a minimum
page_shift of 9 (log_pg_sz of 9 returned by QUERY_DEV_LIM) -- so with
old drivers, ib_fmr_alloc() would fail for ULPs using the device
minimum when creating FMRs.
To preserve firmware compatibility with released mlx4 drivers, the
firmware will continue to return 12 as before for log_page_sz in
QUERY_DEV_CAP for these drivers. However, to enable new drivers to
take advantage of the available smaller page size, the mlx4 driver now
first sets the log_pg_sz to the device minimum by setting a
log_page_sz value to 0 via the MOD_STAT_CFG command and then reading
the real minimum via QUERY_DEV_CAP.
Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Vladimir Sokolovsky <vlad@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/net/mlx4/fw.h')
| -rw-r--r-- | drivers/net/mlx4/fw.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/mlx4/fw.h b/drivers/net/mlx4/fw.h index 306cb9b0242d..a0e046c149b7 100644 --- a/drivers/net/mlx4/fw.h +++ b/drivers/net/mlx4/fw.h @@ -38,6 +38,11 @@ #include "mlx4.h" #include "icm.h" +struct mlx4_mod_stat_cfg { + u8 log_pg_sz; + u8 log_pg_sz_m; +}; + struct mlx4_dev_cap { int max_srq_sz; int max_qp_sz; @@ -162,5 +167,6 @@ int mlx4_SET_ICM_SIZE(struct mlx4_dev *dev, u64 icm_size, u64 *aux_pages); int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm); int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev); int mlx4_NOP(struct mlx4_dev *dev); +int mlx4_MOD_STAT_CFG(struct mlx4_dev *dev, struct mlx4_mod_stat_cfg *cfg); #endif /* MLX4_FW_H */ |