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From 7e9f37893c874ff2a01dfbf73d31d3de37359fc7 Mon Sep 17 00:00:00 2001
From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Mon, 16 May 2016 21:50:57 -0400
Subject: [PATCH] rtl8xxxu: Enable aggregation for rtl8723au
Implement rtl8xxxu_gen1_init_aggregation(). Aggregation should be the
same for all gen1 parts. We may want to allow for tuning parameters in
the fileopes struct. For now this is based allocating 16KB RX buffers,
leaving 16000 bytes for actual packets, and the rest for the skb
overhead.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
---
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h | 1 +
.../net/wireless/realtek/rtl8xxxu/rtl8xxxu_8723a.c | 2 ++
.../net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 34 ++++++++++++++++++++++
3 files changed, 37 insertions(+)
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
@@ -1412,6 +1412,7 @@ void rtl8xxxu_gen1_report_connect(struct
u8 macid, bool connect);
void rtl8xxxu_gen2_report_connect(struct rtl8xxxu_priv *priv,
u8 macid, bool connect);
+void rtl8xxxu_gen1_init_aggregation(struct rtl8xxxu_priv *priv);
void rtl8xxxu_gen1_enable_rf(struct rtl8xxxu_priv *priv);
void rtl8xxxu_gen1_disable_rf(struct rtl8xxxu_priv *priv);
void rtl8xxxu_gen2_disable_rf(struct rtl8xxxu_priv *priv);
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8723a.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8723a.c
@@ -377,6 +377,7 @@ struct rtl8xxxu_fileops rtl8723au_fops =
.phy_iq_calibrate = rtl8xxxu_gen1_phy_iq_calibrate,
.config_channel = rtl8xxxu_gen1_config_channel,
.parse_rx_desc = rtl8xxxu_parse_rxdesc16,
+ .init_aggregation = rtl8xxxu_gen1_init_aggregation,
.enable_rf = rtl8xxxu_gen1_enable_rf,
.disable_rf = rtl8xxxu_gen1_disable_rf,
.usb_quirks = rtl8xxxu_gen1_usb_quirks,
@@ -384,6 +385,7 @@ struct rtl8xxxu_fileops rtl8723au_fops =
.update_rate_mask = rtl8xxxu_update_rate_mask,
.report_connect = rtl8xxxu_gen1_report_connect,
.writeN_block_size = 1024,
+ .rx_agg_buf_size = 16000,
.tx_desc_size = sizeof(struct rtl8xxxu_txdesc32),
.rx_desc_size = sizeof(struct rtl8xxxu_rxdesc16),
.adda_1t_init = 0x0b1b25a0,
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -4405,6 +4405,40 @@ void rtl8xxxu_gen2_report_connect(struct
rtl8xxxu_gen2_h2c_cmd(priv, &h2c, sizeof(h2c.media_status_rpt));
}
+void rtl8xxxu_gen1_init_aggregation(struct rtl8xxxu_priv *priv)
+{
+ u8 agg_ctrl, usb_spec, page_thresh;
+
+ usb_spec = rtl8xxxu_read8(priv, REG_USB_SPECIAL_OPTION);
+ usb_spec &= ~USB_SPEC_USB_AGG_ENABLE;
+
+ agg_ctrl = rtl8xxxu_read8(priv, REG_TRXDMA_CTRL);
+ agg_ctrl &= ~TRXDMA_CTRL_RXDMA_AGG_EN;
+
+ 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
+ * which matches the 512 byte rounding we have to do when de-muxing
+ * the packets.
+ *
+ * Sample numbers from the vendor driver:
+ * USB High-Speed mode values:
+ * RxAggBlockCount = 8 : 512 byte unit
+ * RxAggBlockTimeout = 6
+ * RxAggPageCount = 48 : 128 byte unit
+ * RxAggPageTimeout = 4 or 6 (absolute time 34ms/(2^6))
+ */
+
+ page_thresh = (priv->fops->rx_agg_buf_size / 512);
+ rtl8xxxu_write8(priv, REG_RXDMA_AGG_PG_TH, page_thresh);
+ rtl8xxxu_write8(priv, REG_USB_DMA_AGG_TO, 4);
+ priv->rx_buf_aggregation = 1;
+}
+
static void rtl8xxxu_set_basic_rates(struct rtl8xxxu_priv *priv, u32 rate_cfg)
{
u32 val32;
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