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rtl8xxxu: Make DMA aggregation optional by setting a module parameter

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Let the default to off until we have more data on the right default
tuning values.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Jes Sorensen 2016-06-27 12:32:08 -04:00 committed by Kalle Valo
parent 0a20ed8bd0
commit 82cce22acd
1 changed files with 9 additions and 2 deletions
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13
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
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@ -44,6 +44,7 @@
int rtl8xxxu_debug = RTL8XXXU_DEBUG_EFUSE;
static bool rtl8xxxu_ht40_2g;
static bool rtl8xxxu_dma_aggregation;
MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@redhat.com>");
MODULE_DESCRIPTION("RTL8XXXu USB mac80211 Wireless LAN Driver");
@ -62,6 +63,8 @@ module_param_named(debug, rtl8xxxu_debug, int, 0600);
MODULE_PARM_DESC(debug, "Set debug mask");
module_param_named(ht40_2g, rtl8xxxu_ht40_2g, bool, 0600);
MODULE_PARM_DESC(ht40_2g, "Enable HT40 support on the 2.4GHz band");
module_param_named(dma_aggregation, rtl8xxxu_dma_aggregation, bool, 0600);
MODULE_PARM_DESC(dma_aggregation, "Enable DMA packet aggregation");
#define USB_VENDOR_ID_REALTEK 0x0bda
#define RTL8XXXU_RX_URBS 32
@ -4411,14 +4414,18 @@ void rtl8xxxu_gen1_init_aggregation(struct rtl8xxxu_priv *priv)
usb_spec = rtl8xxxu_read8(priv, REG_USB_SPECIAL_OPTION);
usb_spec &= ~USB_SPEC_USB_AGG_ENABLE;
rtl8xxxu_write8(priv, REG_USB_SPECIAL_OPTION, usb_spec);
agg_ctrl = rtl8xxxu_read8(priv, REG_TRXDMA_CTRL);
agg_ctrl &= ~TRXDMA_CTRL_RXDMA_AGG_EN;
agg_ctrl |= TRXDMA_CTRL_RXDMA_AGG_EN;
if (!rtl8xxxu_dma_aggregation) {
rtl8xxxu_write8(priv, REG_TRXDMA_CTRL, agg_ctrl);
return;
}
agg_ctrl |= TRXDMA_CTRL_RXDMA_AGG_EN;
rtl8xxxu_write8(priv, REG_TRXDMA_CTRL, agg_ctrl);
rtl8xxxu_write8(priv, REG_USB_SPECIAL_OPTION, usb_spec);
/*
* The number of packets we can take looks to be buffer size / 512