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54 lines
2.0 KiB
54 lines
2.0 KiB
From 0640e5cd53bc004be1a9a1af6d340baab44d9351 Mon Sep 17 00:00:00 2001
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From: Jes Sorensen <Jes.Sorensen@redhat.com>
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Date: Thu, 16 Jun 2016 14:46:05 -0400
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Subject: [PATCH] rtl8xxxu: Make DMA aggregation optional by setting a module
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parameter
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Let the default to off until we have more data on the right default
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tuning values.
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Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
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---
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drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 11 +++++++++--
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1 file changed, 9 insertions(+), 2 deletions(-)
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--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
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+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
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@@ -44,6 +44,7 @@
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int rtl8xxxu_debug = RTL8XXXU_DEBUG_EFUSE;
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static bool rtl8xxxu_ht40_2g;
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+static bool rtl8xxxu_dma_aggregation;
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MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@redhat.com>");
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MODULE_DESCRIPTION("RTL8XXXu USB mac80211 Wireless LAN Driver");
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@@ -62,6 +63,8 @@ module_param_named(debug, rtl8xxxu_debug
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MODULE_PARM_DESC(debug, "Set debug mask");
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module_param_named(ht40_2g, rtl8xxxu_ht40_2g, bool, 0600);
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MODULE_PARM_DESC(ht40_2g, "Enable HT40 support on the 2.4GHz band");
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+module_param_named(dma_aggregation, rtl8xxxu_dma_aggregation, bool, 0600);
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+MODULE_PARM_DESC(dma_aggregation, "Enable DMA packet aggregation");
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#define USB_VENDOR_ID_REALTEK 0x0bda
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#define RTL8XXXU_RX_URBS 32
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@@ -4411,14 +4414,18 @@ void rtl8xxxu_gen1_init_aggregation(stru
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usb_spec = rtl8xxxu_read8(priv, REG_USB_SPECIAL_OPTION);
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usb_spec &= ~USB_SPEC_USB_AGG_ENABLE;
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+ rtl8xxxu_write8(priv, REG_USB_SPECIAL_OPTION, usb_spec);
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agg_ctrl = rtl8xxxu_read8(priv, REG_TRXDMA_CTRL);
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agg_ctrl &= ~TRXDMA_CTRL_RXDMA_AGG_EN;
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- agg_ctrl |= TRXDMA_CTRL_RXDMA_AGG_EN;
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+ if (!rtl8xxxu_dma_aggregation) {
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+ rtl8xxxu_write8(priv, REG_TRXDMA_CTRL, agg_ctrl);
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+ return;
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+ }
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+ agg_ctrl |= TRXDMA_CTRL_RXDMA_AGG_EN;
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rtl8xxxu_write8(priv, REG_TRXDMA_CTRL, agg_ctrl);
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- rtl8xxxu_write8(priv, REG_USB_SPECIAL_OPTION, usb_spec);
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/*
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* The number of packets we can take looks to be buffer size / 512
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