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| author | Ioana Radulescu <ruxandra.radulescu@freescale.com> | 2013-07-08 16:52:09 (GMT) |
|---|---|---|
| committer | Fleming Andrew-AFLEMING <AFLEMING@freescale.com> | 2013-07-30 21:05:25 (GMT) |
| commit | 086d3b61366bd341cd2532142111fed2e6f2161f (patch) | |
| tree | f3d38df3d1c9459af81accc7287149ec27634550 /drivers/net/ethernet/freescale/fman/Kconfig | |
| parent | 679c0b00fa6310766b38deda6b62658e57b7e1e8 (diff) | |
| download | linux-fsl-qoriq-086d3b61366bd341cd2532142111fed2e6f2161f.tar.xz | |
fmd: Update range for FSL_FM_RX_EXTRA_HEADROOM
We need to reserve some space in the Rx skb buffer for NET_IP_ALIGN,
otherwise on forwarding the stack may reallocate the skb header.
The most easily available place to do this is the Rx extra headroom,
so enforce the minimum non-zero possible value as lower end of the
configuration range.
While here, enforce (and comment on) the restriction to only set values
which are a multiple of 16 bytes, which was missed in the previous
version of the help text.
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@freescale.com>
Change-Id: I9403a36f11cc1c7b9460126fb5ab97237f9bd105
Reviewed-on: http://git.am.freescale.net:8181/3482
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Hamciuc Bogdan-BHAMCIU1 <bogdan.hamciuc@freescale.com>
Reviewed-by: Bucur Madalin-Cristian-B32716 <madalin.bucur@freescale.com>
Reviewed-by: Sovaiala Cristian-Constantin-B39531 <Cristian.Sovaiala@freescale.com>
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Diffstat (limited to 'drivers/net/ethernet/freescale/fman/Kconfig')
| -rw-r--r-- | drivers/net/ethernet/freescale/fman/Kconfig | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/ethernet/freescale/fman/Kconfig b/drivers/net/ethernet/freescale/fman/Kconfig index ec7449f..eaecb1c 100644 --- a/drivers/net/ethernet/freescale/fman/Kconfig +++ b/drivers/net/ethernet/freescale/fman/Kconfig @@ -85,14 +85,16 @@ config FSL_FM_MAX_FRAME_SIZE config FSL_FM_RX_EXTRA_HEADROOM int "Add extra headroom at beginning of data buffers" depends on FSL_FMAN - range 0 384 + range 16 384 default "64" help Configure this to tell the Frame Manager to reserve some extra space at the beginning of a data buffer on the receive path, before Internal Context fields are copied. This is in addition to the private data area already reserved for driver internal - use. The option does not affect in any way the layout of + use. The provided value must be a multiple of 16. + + This option does not affect in any way the layout of transmitted buffers. You may be required to enable the config option FMAN_RESOURCE_ALLOCATION_ALGORITHM and also FMAN_DISABLE_OH_TO_REUSE_RESOURCES to have enough resources |