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| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2015-11-07 02:26:07 +0300 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-12-03 13:23:35 +0300 |
| commit | 827de39212298048e75309377c8262c4d7f2cb41 (patch) | |
| tree | 79193f86fab93e495bd093879912c2a230bb59bd /drivers/net/ethernet/intel/i40e/i40e.h | |
| parent | d82acb353246d3989377761ca26f5489264a4793 (diff) | |
| download | linux-827de39212298048e75309377c8262c4d7f2cb41.tar.xz | |
i40e: use priv flags to control packet split
Ethtool priv flags implementation to enable or disable packet split, which
is a hardware feature that inspects headers and will put headers in a
separate DMA buffer from the payload data. The driver was automatically
choosing to enable packet split in some cases and this gives the user the
ability to turn it off/on explicitly.
to query state:
ethtool --show-priv-flags ethx
to enable:
ethtool --set-priv-flags ethx packet-split on
to disable:
ethtool --set-priv-flags ethx packet-split off
Why would anyone want this?
Because some environments benefit from header/data split in the receive
buffer, and the driver defaults to one or the other depending on
environment/kernel parameters.
Why didn't you implement a generic ethtool control for this feature?
Because Intel hardware is the only hardware that supports header/data
split.
Change-ID: I803121e1eecc9ccb2884031fd85dd1110b3af66d
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index dde7ae71bfb8..4ca85d554b52 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -104,6 +104,7 @@ #define I40E_PRIV_FLAGS_LINKPOLL_FLAG BIT(1) #define I40E_PRIV_FLAGS_FD_ATR BIT(2) #define I40E_PRIV_FLAGS_VEB_STATS BIT(3) +#define I40E_PRIV_FLAGS_PS BIT(4) #define I40E_NVM_VERSION_LO_SHIFT 0 #define I40E_NVM_VERSION_LO_MASK (0xff << I40E_NVM_VERSION_LO_SHIFT) |