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| author | Ralph Campbell <ralph.campbell@qlogic.com> | 2007-07-24 13:55:39 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-10-09 20:04:14 -0700 |
| commit | 210d6ca3db058cd1d6e6fd235ee3e25d6ac221cd (patch) | |
| tree | 3fb104498d7b4144a1da0ca9d4a2241560a96ef4 /drivers/infiniband/hw/ipath/ipath_kernel.h | |
| parent | 327a338d4fd018d33e7cacde46c0d82622b4bda8 (diff) | |
| download | blackbird-op-linux-210d6ca3db058cd1d6e6fd235ee3e25d6ac221cd.tar.gz blackbird-op-linux-210d6ca3db058cd1d6e6fd235ee3e25d6ac221cd.zip | |
IB/ipath: Performance optimization for CPU differences
Different processors have different ordering restrictions for write
combining. By taking advantage of this, we can eliminate some write
barriers when writing to the send buffers.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_kernel.h')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_kernel.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h index 7a7966f7e4ff..d983f92b9bcb 100644 --- a/drivers/infiniband/hw/ipath/ipath_kernel.h +++ b/drivers/infiniband/hw/ipath/ipath_kernel.h @@ -724,6 +724,8 @@ int ipath_set_rx_pol_inv(struct ipath_devdata *dd, u8 new_pol_inv); #define IPATH_LINKACTIVE 0x200 /* link current state is unknown */ #define IPATH_LINKUNK 0x400 + /* Write combining flush needed for PIO */ +#define IPATH_PIO_FLUSH_WC 0x1000 /* no IB cable, or no device on IB cable */ #define IPATH_NOCABLE 0x4000 /* Supports port zero per packet receive interrupts via |
