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Commit 92fc43b4 authored by Hayes Wang's avatar Hayes Wang Committed by Francois Romieu
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r8169: modify the flow of the hw reset. 



- Disable tx and rx by resetting hw, so replace rtl8169_asic_down
  with rtl8169_hw_reset.
- RxConfig bits 0 ~ 5 have to be cleared before hw reset to avoid
  receiving spurious data.
- Certain chips need to do some checking before reset.
- Remove hw reset which is done before hw_start. It is done in close,
  down or device probe functions.
- Move rtl8169_init_ring_indexes function into rtl_hw_reset function.
  The indexes of tx and rx only need to be zero when the hw resets.

Signed-off-by: default avatarHayes Wang <hayeswang@realtek.com>
Acked-by: default avatarFrancois Romieu <romieu@fr.zoreil.com>
parent 4f6b00e5

drivers/net/r8169.c

+28 −25
Original line number Diff line number Diff line
@@ -1071,13 +1071,6 @@ 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;
@@ -3337,6 +3330,11 @@ static void __devinit rtl_init_pll_power_ops(struct rtl8169_private *tp) 
	}

}



static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)

{

	tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;

}



static void rtl_hw_reset(struct rtl8169_private *tp)

{

	void __iomem *ioaddr = tp->mmio_addr;
@@ -3349,8 +3347,10 @@ static void rtl_hw_reset(struct rtl8169_private *tp) 
	for (i = 0; i < 100; i++) {

		if ((RTL_R8(ChipCmd) & CmdReset) == 0)

			break;

		msleep_interruptible(1);

		udelay(100);

	}



	rtl8169_init_ring_indexes(tp);

}



static int __devinit
@@ -3732,6 +3732,16 @@ 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 &= ~(AcceptErr | AcceptRunt | AcceptBroadcast | AcceptMulticast |

		   AcceptMyPhys | AcceptAllPhys);

	RTL_W32(RxConfig, rxcfg);

}



static void rtl8169_hw_reset(struct rtl8169_private *tp)

{

	void __iomem *ioaddr = tp->mmio_addr;
@@ -3739,19 +3749,19 @@ 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)
@@ -3771,8 +3781,6 @@ 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);
@@ -4581,11 +4589,6 @@ err_out: 
	return -ENOMEM;

}



static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)

{

	tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;

}



static int rtl8169_init_ring(struct net_device *dev)

{

	struct rtl8169_private *tp = netdev_priv(dev);
@@ -4713,7 +4716,7 @@ static void rtl8169_reset_task(struct work_struct *work) 


	rtl8169_tx_clear(tp);



	rtl8169_init_ring_indexes(tp);

	rtl8169_hw_reset(tp);

	rtl_hw_start(dev);

	netif_wake_queue(dev);

	rtl8169_check_link_status(dev, tp, tp->mmio_addr);
@@ -5127,7 +5130,7 @@ 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;

		}
@@ -5250,7 +5253,7 @@ 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,
@@ -5504,7 +5507,7 @@ 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);