Commit e0106ada authored by Vladimir Kondratiev's avatar Vladimir Kondratiev Committed by John W. Linville
Browse files

wil6210: enlarge TX/RX buffer length 



HW supports upto 2304 packet size on the air.
HW is responsible for adding (Tx) or removing (Rx) the following headers:
802.11 hdr: 26B
SNAP: 8B
CRC: 4B
Security (optional): 24B
HW adds max 62B to the payload passed from driver. It means driver can use
max packet size of 2304-62 = 2242B

Signed-off-by: default avatarDedy Lansky <qca_dlansky@qca.qualcomm.com>
Signed-off-by: default avatarVladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 1bd922fc

drivers/net/wireless/ath/wil6210/netdev.c

+4 −1
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/etherdevice.h>



#include "wil6210.h"

#include "txrx.h"



static int wil_open(struct net_device *ndev)

{
@@ -40,8 +41,10 @@ static int wil_change_mtu(struct net_device *ndev, int new_mtu) 
{

	struct wil6210_priv *wil = ndev_to_wil(ndev);



	if (new_mtu < 68 || new_mtu > IEEE80211_MAX_DATA_LEN_DMG)

	if (new_mtu < 68 || new_mtu > (TX_BUF_LEN - ETH_HLEN)) {

		wil_err(wil, "invalid MTU %d\n", new_mtu);

		return -EINVAL;

	}



	wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu);

	ndev->mtu = new_mtu;

drivers/net/wireless/ath/wil6210/txrx.c

+2 −1
Original line number Diff line number Diff line
@@ -668,7 +668,8 @@ int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 
	struct vring *vring = &wil->vring_tx[id];

	struct vring_tx_data *txdata = &wil->vring_tx_data[id];



	wil_dbg_misc(wil, "%s()\n", __func__);

	wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__,

		     cmd.vring_cfg.tx_sw_ring.max_mpdu_size);



	if (vring->va) {

		wil_err(wil, "Tx ring [%d] already allocated\n", id);

drivers/net/wireless/ath/wil6210/txrx.h

+3 −3
Original line number Diff line number Diff line
@@ -20,9 +20,9 @@ 
#define BUF_SW_OWNED    (1)

#define BUF_HW_OWNED    (0)



/* size of max. Rx packet */

#define RX_BUF_LEN      (2048)

#define TX_BUF_LEN      (2048)

/* size of max. Tx/Rx buffers, as supported by FW */

#define RX_BUF_LEN      (2242)

#define TX_BUF_LEN      (2242)

/* how many bytes to reserve for rtap header? */

#define WIL6210_RTAP_SIZE (128)