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ath10k: document decap modes

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Clarify how each decap mode works in one place.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2013-09-26 10:12:23 +03:00 committed by Kalle Valo
parent f6dc2095a0
commit 26d1e9c261
1 changed files with 22 additions and 2 deletions
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24
drivers/net/wireless/ath/ath10k/rx_desc.h
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@ -422,10 +422,30 @@ struct rx_mpdu_end {
#define RX_MSDU_START_INFO1_IP_FRAG (1 << 14)
#define RX_MSDU_START_INFO1_TCP_ONLY_ACK (1 << 15)
/* The decapped header (rx_hdr_status) contains the following:
* a) 802.11 header
* [padding to 4 bytes]
* b) HW crypto parameter
* - 0 bytes for no security
* - 4 bytes for WEP
* - 8 bytes for TKIP, AES
* [padding to 4 bytes]
* c) A-MSDU subframe header (14 bytes) if appliable
* d) LLC/SNAP (RFC1042, 8 bytes)
*
* In case of A-MSDU only first frame in sequence contains (a) and (b). */
enum rx_msdu_decap_format {
RX_MSDU_DECAP_RAW = 0,
RX_MSDU_DECAP_NATIVE_WIFI = 1,
RX_MSDU_DECAP_RAW = 0,
/* Note: QoS frames are reported as non-QoS. The rx_hdr_status in
* htt_rx_desc contains the original decapped 802.11 header. */
RX_MSDU_DECAP_NATIVE_WIFI = 1,
/* Payload contains an ethernet header (struct ethhdr). */
RX_MSDU_DECAP_ETHERNET2_DIX = 2,
/* Payload contains two 48-bit addresses and 2-byte length (14 bytes
* total), followed by an RFC1042 header (8 bytes). */
RX_MSDU_DECAP_8023_SNAP_LLC = 3
};