linux-kernel - [PATCH net-next 2/6] r8169: modify the flow hw reset

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Message-ID: <1309859095-32031-2-git-send-email-hayeswang@realtek.com>
Date:	Tue, 5 Jul 2011 17:44:51 +0800
From:	Hayes Wang <hayeswang@...ltek.com>
To:	<romieu@...zoreil.com>
CC:	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Hayes Wang <hayeswang@...ltek.com>
Subject: [PATCH net-next 2/6] r8169: modify the flow hw reset

Replace rtl8169_asic_down with rtl8169_hw_reset. Clear RxConfig
bit 0 ~ 3 and do some checking before reset. Remove hw reset
which is before hw_start because reset would be done in close or
down.

Signed-off-by: Hayes Wang <hayeswang@...ltek.com>
---
 drivers/net/r8169.c |   43 ++++++++++++++++++++++++-------------------
 1 files changed, 24 insertions(+), 19 deletions(-)

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 701ab6b..cdbbe47 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -731,6 +731,8 @@ static int rtl8169_poll(struct napi_struct *napi, int budget);
 static const unsigned int rtl8169_rx_config =
 	(RX_FIFO_THRESH << RxCfgFIFOShift) | (RX_DMA_BURST << RxCfgDMAShift);
 
+static void rtl8169_init_ring_indexes(struct rtl8169_private *tp);
+
 static u32 ocp_read(struct rtl8169_private *tp, u8 mask, u16 reg)
 {
 	void __iomem *ioaddr = tp->mmio_addr;
@@ -1076,13 +1078,6 @@ static void rtl8169_irq_mask_and_ack(void __iomem *ioaddr)
 	RTL_W16(IntrStatus, 0xffff);
 }
 
-static void rtl8169_asic_down(void __iomem *ioaddr)
-{
-	RTL_W8(ChipCmd, 0x00);
-	rtl8169_irq_mask_and_ack(ioaddr);
-	RTL_R16(CPlusCmd);
-}
-
 static unsigned int rtl8169_tbi_reset_pending(struct rtl8169_private *tp)
 {
 	void __iomem *ioaddr = tp->mmio_addr;
@@ -3352,10 +3347,12 @@ static void rtl_hw_reset(struct rtl8169_private *tp)
 
 	/* Check that the chip has finished the reset. */
 	for (i = 0; i < 100; i++) {
+		udelay(100);
 		if ((RTL_R8(ChipCmd) & CmdReset) == 0)
 			break;
-		msleep_interruptible(1);
 	}
+
+	rtl8169_init_ring_indexes(tp);
 }
 
 static int __devinit
@@ -3737,6 +3734,16 @@ err_pm_runtime_put:
 	goto out;
 }
 
+static void rtl_rx_close(struct rtl8169_private *tp)
+{
+	void __iomem *ioaddr = tp->mmio_addr;
+	u32 rxcfg = RTL_R32(RxConfig);
+
+	rxcfg &= ~(AcceptBroadcast | AcceptMulticast |
+		   AcceptMyPhys | AcceptAllPhys);
+	RTL_W32(RxConfig, rxcfg);
+}
+
 static void rtl8169_hw_reset(struct rtl8169_private *tp)
 {
 	void __iomem *ioaddr = tp->mmio_addr;
@@ -3744,19 +3751,20 @@ static void rtl8169_hw_reset(struct rtl8169_private *tp)
 	/* Disable interrupts */
 	rtl8169_irq_mask_and_ack(ioaddr);
 
+	rtl_rx_close(tp);
+
 	if (tp->mac_version == RTL_GIGA_MAC_VER_27 ||
 	    tp->mac_version == RTL_GIGA_MAC_VER_28 ||
 	    tp->mac_version == RTL_GIGA_MAC_VER_31) {
 		while (RTL_R8(TxPoll) & NPQ)
 			udelay(20);
 
+	} else {
+		RTL_W8(ChipCmd, RTL_R8(ChipCmd) | StopReq);
+		udelay(100);
 	}
 
-	/* Reset the chipset */
-	RTL_W8(ChipCmd, CmdReset);
-
-	/* PCI commit */
-	RTL_R8(ChipCmd);
+	rtl_hw_reset(tp);
 }
 
 static void rtl_set_rx_tx_config_registers(struct rtl8169_private *tp)
@@ -3776,8 +3784,6 @@ static void rtl_hw_start(struct net_device *dev)
 {
 	struct rtl8169_private *tp = netdev_priv(dev);
 
-	rtl_hw_reset(tp);
-
 	tp->hw_start(dev);
 
 	netif_start_queue(dev);
@@ -4718,7 +4724,6 @@ static void rtl8169_reset_task(struct work_struct *work)
 
 	rtl8169_tx_clear(tp);
 
-	rtl8169_init_ring_indexes(tp);
 	rtl_hw_start(dev);
 	netif_wake_queue(dev);
 	rtl8169_check_link_status(dev, tp, tp->mmio_addr);
@@ -5132,7 +5137,7 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
 		 * the chip, so just exit the loop.
 		 */
 		if (unlikely(!netif_running(dev))) {
-			rtl8169_asic_down(ioaddr);
+			rtl8169_hw_reset(tp);
 			break;
 		}
 
@@ -5255,7 +5260,7 @@ static void rtl8169_down(struct net_device *dev)
 
 	spin_lock_irq(&tp->lock);
 
-	rtl8169_asic_down(ioaddr);
+	rtl8169_hw_reset(tp);
 	/*
 	 * At this point device interrupts can not be enabled in any function,
 	 * as netif_running is not true (rtl8169_interrupt, rtl8169_reset_task,
@@ -5509,7 +5514,7 @@ static void rtl_shutdown(struct pci_dev *pdev)
 
 	spin_lock_irq(&tp->lock);
 
-	rtl8169_asic_down(ioaddr);
+	rtl8169_hw_reset(tp);
 
 	spin_unlock_irq(&tp->lock);
 
-- 
1.7.3.2

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