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Commit 26d1e9c2 authored by Michal Kazior's avatar Michal Kazior Committed by Kalle Valo
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ath10k: document decap modes 



Clarify how each decap mode works in one place.

Signed-off-by: default avatarMichal Kazior <michal.kazior@tieto.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent f6dc2095

drivers/net/wireless/ath/ath10k/rx_desc.h

+22 −2
Original line number Diff line number Diff line
@@ -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,



	/* 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

};