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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: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2013-05-16 18:38:11 +01:00
parent 3ea84c5492
commit d07df8ec08
2 changed files with 15 additions and 5 deletions
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1
drivers/net/ethernet/sfc/net_driver.h
View File

@ -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

19
drivers/net/ethernet/sfc/nic.c
View File

@ -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);
}