diff options
| author | Roland Dreier <rolandd@cisco.com> | 2007-06-18 19:13:48 +0400 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-06-18 19:13:48 +0400 |
| commit | 0e6e74162164d908edf7889ac66dca09e7505745 (patch) | |
| tree | 7828d670c099771492dac599f8a7323c4e681e52 /drivers/infiniband/hw/mlx4/mlx4_ib.h | |
| parent | 42c059ea2b0aac5f961253ba81c1b464d181a600 (diff) | |
| download | linux-0e6e74162164d908edf7889ac66dca09e7505745.tar.xz | |
IB/mlx4: Handle new FW requirement for send request prefetching
New ConnectX firmware introduces FW command interface revision 2,
which requires that for each QP, a chunk of send queue entries (the
"headroom") is kept marked as invalid, so that the HCA doesn't get
confused if it prefetches entries that haven't been posted yet. Add
code to the driver to do this, and also update the user ABI so that
userspace can request that the prefetcher be turned off for userspace
QPs (we just leave the prefetcher on for all kernel QPs).
Unfortunately, marking send queue entries this way is confuses older
firmware, so we change the driver to allow only FW command interface
revisions 2. This means that users will have to update their firmware
to work with the new driver, but the firmware is changing quickly and
the old firmware has lots of other bugs anyway, so this shouldn't be too
big a deal.
Based on a patch from Jack Morgenstein <jackm@dev.mellanox.co.il>.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx4/mlx4_ib.h')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/mlx4_ib.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h index 93dac71f3230..24ccadd6e4f8 100644 --- a/drivers/infiniband/hw/mlx4/mlx4_ib.h +++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h @@ -95,7 +95,8 @@ struct mlx4_ib_mr { struct mlx4_ib_wq { u64 *wrid; spinlock_t lock; - int max; + int wqe_cnt; + int max_post; int max_gs; int offset; int wqe_shift; @@ -113,6 +114,7 @@ struct mlx4_ib_qp { u32 doorbell_qpn; __be32 sq_signal_bits; + int sq_spare_wqes; struct mlx4_ib_wq sq; struct ib_umem *umem; @@ -123,6 +125,7 @@ struct mlx4_ib_qp { u8 alt_port; u8 atomic_rd_en; u8 resp_depth; + u8 sq_no_prefetch; u8 state; }; |