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| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2009-02-24 16:37:31 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-02-24 16:37:31 -0800 |
| commit | 32344a394029baeca5bcc9fa839694b23a82cc64 (patch) | |
| tree | 47360c3dd12fcc7aa100547ee3becbe9d0961a3d /drivers/net/ixgbe/ixgbe.h | |
| parent | c7e4358ae8e49f85a4d528366046da26b36a712f (diff) | |
| download | op-kernel-dev-32344a394029baeca5bcc9fa839694b23a82cc64.zip op-kernel-dev-32344a394029baeca5bcc9fa839694b23a82cc64.tar.gz | |
ixbge: fix bug when using large pages and jumbo frames
it was pointed out on the list that ixgbe was failing when using 64kB pages
and large 16kB MTU.
since with a 64kB PAGE_SIZE MAX_SKB_FRAGS = 3, the way the driver was
configuring page usage was assuming 2kB is half a page, and was only
ever dmaing that much data to a half page.
(16kB - header size) / 2048 = 7 or 8 pages, which would far exceed 3
adjust the driver to account for these large pages, the hardware can
support DMA to up to 16kB for each descriptor.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ixgbe/ixgbe.h')
| -rw-r--r-- | drivers/net/ixgbe/ixgbe.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h index c0e56aa..2d877da 100644 --- a/drivers/net/ixgbe/ixgbe.h +++ b/drivers/net/ixgbe/ixgbe.h @@ -71,6 +71,7 @@ #define IXGBE_RXBUFFER_128 128 /* Used for packet split */ #define IXGBE_RXBUFFER_256 256 /* Used for packet split */ #define IXGBE_RXBUFFER_2048 2048 +#define IXGBE_MAX_RXBUFFER 16384 /* largest size for a single descriptor */ #define IXGBE_RX_HDR_SIZE IXGBE_RXBUFFER_256 |
