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net/sfc/base: add description of the PS packets layout

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Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
This commit is contained in:
Andrew Rybchenko 2017-11-16 08:04:07 +00:00 committed by Ferruh Yigit
parent 3e3317f7f6
commit 11e993ce52
1 changed files with 10 additions and 0 deletions
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10
drivers/net/sfc/base/ef10_rx.c
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@ -804,6 +804,16 @@ ef10_rx_qpush_ps_credits(
rxq_state->eers_rx_packed_stream_credits = 0; rxq_state->eers_rx_packed_stream_credits = 0;
} }
/*
* In accordance with SF-112241-TC the received data has the following layout:
* - 8 byte pseudo-header which consist of:
* - 4 byte little-endian timestamp
* - 2 byte little-endian captured length in bytes
* - 2 byte little-endian original packet length in bytes
* - captured packet bytes
* - optional padding to align to 64 bytes boundary
* - 64 bytes scratch space for the host software
*/
__checkReturn uint8_t * __checkReturn uint8_t *
ef10_rx_qps_packet_info( ef10_rx_qps_packet_info(
__in efx_rxq_t *erp, __in efx_rxq_t *erp,