From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bowers, AndrewX Date: Thu, 6 Apr 2017 21:50:19 +0000 Subject: [Intel-wired-lan] [next S66 v2 10/11] i40e/i40evf: Add support for padding start of frames In-Reply-To: <20170405115103.67374-10-alice.michael@intel.com> References: <20170405115103.67374-1-alice.michael@intel.com> <20170405115103.67374-10-alice.michael@intel.com> Message-ID: <26D9FDECA4FBDD4AADA65D8E2FC68A4A1040B1A0@ORSMSX101.amr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: > -----Original Message----- > From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On > Behalf Of Alice Michael > Sent: Wednesday, April 5, 2017 4:51 AM > To: Michael, Alice ; intel-wired- > lan at lists.osuosl.org > Subject: [Intel-wired-lan] [next S66 v2 10/11] i40e/i40evf: Add support for > padding start of frames > > From: Alexander Duyck > > This patch adds padding to the start of frames to make room for headroom > for us to eventually start using build_skb. Right now we guarantee at least > NET_SKB_PAD + NET_IP_ALIGN, however we allocate more space if more is > available. For example on x86 the headroom should be 192 bytes. > > On systems that have too large of a cache line size to support storing 1.5K > padding and shared info we default to using 3K buffers and reserve > everything that isn't used for skb_shared_info or the data buffer for > headroom. > > Signed-off-by: Alexander Duyck > Change-ID: I33c641c9a1ea10cf7cc484c2d20985368d2d709a > --- > drivers/net/ethernet/intel/i40e/i40e_main.c | 9 +++- > drivers/net/ethernet/intel/i40e/i40e_txrx.c | 15 +++++- > drivers/net/ethernet/intel/i40e/i40e_txrx.h | 70 > ++++++++++++++++++++++++- > drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 15 +++++- > drivers/net/ethernet/intel/i40evf/i40e_txrx.h | 70 > ++++++++++++++++++++++++- > drivers/net/ethernet/intel/i40evf/i40evf_main.c | 8 ++- > 6 files changed, 179 insertions(+), 8 deletions(-) Tested-by: Andrew Bowers