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wil6210: fix max. MPDU size

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When configuring Tx/Rx VRING's, driver need to specify max. MPDU size
It should take into account all overhead introduced by 802.3->208.11
transformation.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Vladimir Kondratiev
2014-12-23 09:47:11 +02:00
committed by Kalle Valo
parent 26a359d914
commit c44690a157
5 changed files with 16 additions and 6 deletions
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12
drivers/net/wireless/ath/wil6210/wil6210.h
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@@ -62,11 +62,21 @@ static inline u32 WIL_GET_BITS(u32 x, int b0, int b1)
#define WIL_MAX_AGG_WSIZE (32) /* FW/HW limit */
/* Hardware offload block adds the following:
* 26 bytes - 3-address QoS data header
* 8 bytes - IV + EIV (for GCMP)
* 8 bytes - SNAP
* 16 bytes - MIC (for GCMP)
* 4 bytes - CRC
* 24 bytes - security related (if connection is secure)
*/
#define WIL_MAX_MPDU_OVERHEAD (62)
/* Calculate MAC buffer size for the firmware. It includes all overhead,
* as it will go over the air, and need to be 8 byte aligned
*/
static inline u32 wil_mtu2macbuf(u32 mtu)
{
return ALIGN(mtu + WIL_MAX_MPDU_OVERHEAD, 8);
}
/* Max supported by wil6210 value for interrupt threshold is 5sec. */
#define WIL6210_ITR_TRSH_MAX (5000000)
#define WIL6210_ITR_TRSH_DEFAULT (300) /* usec */