Re: [PATCH net-next 18/33] nfp: add XDP frame size to netronome driver
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From: Jakub Kicinski <kuba@kernel.org>
Date: 2020-04-23 02:43:58
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On Wed, 22 Apr 2020 18:08:52 +0200 Jesper Dangaard Brouer wrote:
The netronome nfp driver use PAGE_SIZE when xdp_prog is set, but xdp.data_hard_start begins at offset NFP_NET_RX_BUF_HEADROOM. Thus, adjust for this when setting xdp.frame_sz, as it counts from data_hard_start. When doing XDP_TX this driver is smart and instead of a full DMA-map does a DMA-sync on with packet length. As xdp_adjust_tail can now grow packet length, add checks to make sure that grow size is within the DMA-mapped size. Cc: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Jesper Dangaard Brouer <redacted>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>