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Commit d07df8ec authored by Ben Hutchings's avatar Ben Hutchings
Browse files

sfc: Define and set RX buffer flag for packets parsed as TCP 



This will be useful for shortcutting some software packet parsing.

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
parent 3ea84c54

drivers/net/ethernet/sfc/net_driver.h

+1 −0
Original line number Diff line number Diff line
@@ -243,6 +243,7 @@ struct efx_rx_buffer { 
#define EFX_RX_BUF_LAST_IN_PAGE	0x0001

#define EFX_RX_PKT_CSUMMED	0x0002

#define EFX_RX_PKT_DISCARD	0x0004

#define EFX_RX_PKT_TCP		0x0040



/**

 * struct efx_rx_page_state - Page-based rx buffer state

drivers/net/ethernet/sfc/nic.c

+14 −5
Original line number Diff line number Diff line
@@ -1080,12 +1080,21 @@ efx_handle_rx_event(struct efx_channel *channel, const efx_qword_t *event) 
	rx_ev_hdr_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_HDR_TYPE);



	if (likely(rx_ev_pkt_ok)) {

		/* If packet is marked as OK and packet type is TCP/IP or

		 * UDP/IP, then we can rely on the hardware checksum.

		/* If packet is marked as OK then we can rely on the

		 * hardware checksum and classification.

		 */

		flags = (rx_ev_hdr_type == FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_TCP ||

			 rx_ev_hdr_type == FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_UDP) ?

			EFX_RX_PKT_CSUMMED : 0;

		flags = 0;

		switch (rx_ev_hdr_type) {

		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_TCP:

			flags |= EFX_RX_PKT_TCP;

			/* fall through */

		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_UDP:

			flags |= EFX_RX_PKT_CSUMMED;

			/* fall through */

		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_OTHER:

		case FSE_AZ_RX_EV_HDR_TYPE_OTHER:

			break;

		}

	} else {

		flags = efx_handle_rx_not_ok(rx_queue, event);

	}