Merge redhat.com:/spare/repo/linux-2.6

into redhat.com:/spare/repo/netdev-2.6/r8169

drivers/net/r8169.c

@@ -56,9 +56,11 @@ VERSION 1.2	<2002/11/30>
 	        printk( "Assertion failed! %s,%s,%s,line=%d\n",	\
         	#expr,__FILE__,__FUNCTION__,__LINE__);		\
         }
+#define dprintk(fmt, args...)	do { printk(PFX fmt, ## args) } while (0)
 #else
 #define assert(expr) do {} while (0)
-#endif
+#define dprintk(fmt, args...)	do {} while (0)
+#endif /* RTL8169_DEBUG */
 
 /* media options */
 #define MAX_UNITS 8
@@ -89,9 +91,12 @@ static int multicast_filter_limit = 32;
 #define NUM_TX_DESC	64	/* Number of Tx descriptor registers */
 #define NUM_RX_DESC	64	/* Number of Rx descriptor registers */
 #define RX_BUF_SIZE	1536	/* Rx Buffer size */
+#define R8169_TX_RING_BYTES	(NUM_TX_DESC * sizeof(struct TxDesc))
+#define R8169_RX_RING_BYTES	(NUM_RX_DESC * sizeof(struct RxDesc))
 
 #define RTL_MIN_IO_SIZE 0x80
-#define TX_TIMEOUT  (6*HZ)
+#define RTL8169_TX_TIMEOUT	(6*HZ)
+#define RTL8169_PHY_TIMEOUT	(HZ) 
 
 /* write/read MMIO register */
 #define RTL_W8(reg, val8)	writeb ((val8), ioaddr + (reg))
@@ -101,11 +106,35 @@ static int multicast_filter_limit = 32;
 #define RTL_R16(reg)		readw (ioaddr + (reg))
 #define RTL_R32(reg)		((unsigned long) readl (ioaddr + (reg)))
 
-static struct {
+enum mac_version {
+	RTL_GIGA_MAC_VER_B = 0x00,
+	/* RTL_GIGA_MAC_VER_C = 0x03, */
+	RTL_GIGA_MAC_VER_D = 0x01,
+	RTL_GIGA_MAC_VER_E = 0x02
+};
+
+enum phy_version {
+	RTL_GIGA_PHY_VER_C = 0x03, /* PHY Reg 0x03 bit0-3 == 0x0000 */
+	RTL_GIGA_PHY_VER_D = 0x04, /* PHY Reg 0x03 bit0-3 == 0x0000 */
+	RTL_GIGA_PHY_VER_E = 0x05, /* PHY Reg 0x03 bit0-3 == 0x0000 */
+	RTL_GIGA_PHY_VER_F = 0x06, /* PHY Reg 0x03 bit0-3 == 0x0001 */
+	RTL_GIGA_PHY_VER_G = 0x07, /* PHY Reg 0x03 bit0-3 == 0x0002 */
+};
+
+
+#define _R(NAME,MAC,MASK) \
+	{ .name = NAME, .mac_version = MAC, .RxConfigMask = MASK }
+
+const static struct {
 	const char *name;
-} board_info[] __devinitdata = {
-	{
-"RealTek RTL8169 Gigabit Ethernet"},};
+	u8 mac_version;
+	u32 RxConfigMask;	/* Clears the bits supported by this chip */
+} rtl_chip_info[] = {
+	_R("RTL8169",		RTL_GIGA_MAC_VER_B, 0xff7e1880),
+	_R("RTL8169s/8110s",	RTL_GIGA_MAC_VER_D, 0xff7e1880),
+	_R("RTL8169s/8110s",	RTL_GIGA_MAC_VER_E, 0xff7e1880)
+};
+#undef _R
 
 static struct pci_device_id rtl8169_pci_tbl[] = {
 	{0x10ec, 0x8169, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
@@ -114,6 +143,8 @@ static struct pci_device_id rtl8169_pci_tbl[] = {
 
 MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl);
 
+static int rx_copybreak = 200;
+
 enum RTL8169_registers {
 	MAC0 = 0,		/* Ethernet hardware address. */
 	MAR0 = 8,		/* Multicast filter. */
@@ -242,14 +273,6 @@ enum RTL8169_register_content {
 	TBILinkOK = 0x02000000,
 };
 
-const static struct {
-	const char *name;
-	u8 version;		/* depend on RTL8169 docs */
-	u32 RxConfigMask;	/* should clear the bits supported by this chip */
-} rtl_chip_info[] = {
-	{
-"RTL-8169", 0x00, 0xff7e1880,},};
-
 enum _DescStatusBit {
 	OWNbit = 0x80000000,
 	EORbit = 0x40000000,
@@ -257,6 +280,8 @@ enum _DescStatusBit {
 	LSbit = 0x10000000,
 };
 
+#define RsvdMask	0x3fffc000
+
 struct TxDesc {
 	u32 status;
 	u32 vlan_tag;
@@ -277,28 +302,33 @@ struct rtl8169_private {
 	struct net_device_stats stats;	/* statistics of net device */
 	spinlock_t lock;	/* spin lock flag */
 	int chipset;
-	unsigned long cur_rx;	/* Index into the Rx descriptor buffer of next Rx pkt. */
-	unsigned long cur_tx;	/* Index into the Tx descriptor buffer of next Rx pkt. */
-	unsigned long dirty_tx;
-	unsigned char *TxDescArrays;	/* Index of Tx Descriptor buffer */
-	unsigned char *RxDescArrays;	/* Index of Rx Descriptor buffer */
+	int mac_version;
+	int phy_version;
+	u32 cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
+	u32 cur_tx; /* Index into the Tx descriptor buffer of next Rx pkt. */
+	u32 dirty_rx;
+	u32 dirty_tx;
 	struct TxDesc *TxDescArray;	/* Index of 256-alignment Tx Descriptor buffer */
 	struct RxDesc *RxDescArray;	/* Index of 256-alignment Rx Descriptor buffer */
-	unsigned char *RxBufferRings;	/* Index of Rx Buffer  */
-	unsigned char *RxBufferRing[NUM_RX_DESC];	/* Index of Rx Buffer array */
+	dma_addr_t TxPhyAddr;
+	dma_addr_t RxPhyAddr;
+	struct sk_buff *Rx_skbuff[NUM_RX_DESC];	/* Rx data buffers */
 	struct sk_buff *Tx_skbuff[NUM_TX_DESC];	/* Index of Transmit data buffer */
+	struct timer_list timer;
+	unsigned long phy_link_down_cnt;
 };
 
 MODULE_AUTHOR("Realtek");
 MODULE_DESCRIPTION("RealTek RTL-8169 Gigabit Ethernet driver");
 MODULE_PARM(media, "1-" __MODULE_STRING(MAX_UNITS) "i");
+MODULE_PARM(rx_copybreak, "i");
 MODULE_LICENSE("GPL");
 
 static int rtl8169_open(struct net_device *dev);
 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev);
 static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance,
 			      struct pt_regs *regs);
-static void rtl8169_init_ring(struct net_device *dev);
+static int rtl8169_init_ring(struct net_device *dev);
 static void rtl8169_hw_start(struct net_device *dev);
 static int rtl8169_close(struct net_device *dev);
 static void rtl8169_set_rx_mode(struct net_device *dev);
@@ -306,11 +336,15 @@ static void rtl8169_tx_timeout(struct net_device *dev);
 static struct net_device_stats *rtl8169_get_stats(struct net_device *netdev);
 
 static const u16 rtl8169_intr_mask =
-    SYSErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver | TxErr | TxOK |
-    RxErr | RxOK;
+    RxUnderrun | RxOverflow | RxFIFOOver | TxErr | TxOK | RxErr | RxOK;
 static const unsigned int rtl8169_rx_config =
     (RX_FIFO_THRESH << RxCfgFIFOShift) | (RX_DMA_BURST << RxCfgDMAShift);
 
+#define PHY_Cap_10_Half_Or_Less PHY_Cap_10_Half
+#define PHY_Cap_10_Full_Or_Less PHY_Cap_10_Full | PHY_Cap_10_Half_Or_Less
+#define PHY_Cap_100_Half_Or_Less PHY_Cap_100_Half | PHY_Cap_10_Full_Or_Less
+#define PHY_Cap_100_Full_Or_Less PHY_Cap_100_Full | PHY_Cap_100_Half_Or_Less
+
 void
 mdio_write(void *ioaddr, int RegAddr, int value)
 {
@@ -342,13 +376,258 @@ mdio_read(void *ioaddr, int RegAddr)
 		if (RTL_R32(PHYAR) & 0x80000000) {
 			value = (int) (RTL_R32(PHYAR) & 0xFFFF);
 			break;
-		} else {
-			udelay(100);
 		}
+		udelay(100);
 	}
 	return value;
 }
 
+static void rtl8169_write_gmii_reg_bit(void *ioaddr, int reg, int bitnum,
+				       int bitval)
+{
+	int val;
+
+	val = mdio_read(ioaddr, reg);
+	val = (bitval == 1) ?
+		val | (bitval << bitnum) :  val & ~(0x0001 << bitnum);
+	mdio_write(ioaddr, reg, val & 0xffff); 
+}
+
+static void rtl8169_get_mac_version(struct rtl8169_private *tp, void *ioaddr)
+{
+	const struct {
+		u32 mask;
+		int mac_version;
+	} mac_info[] = {
+		{ 0x1 << 26,	RTL_GIGA_MAC_VER_E },
+		{ 0x1 << 23,	RTL_GIGA_MAC_VER_D }, 
+		{ 0x00000000,	RTL_GIGA_MAC_VER_B } /* Catch-all */
+	}, *p = mac_info;
+	u32 reg;
+
+	reg = RTL_R32(TxConfig) & 0x7c800000;
+	while ((reg & p->mask) != p->mask)
+		p++;
+	tp->mac_version = p->mac_version;
+}
+
+static void rtl8169_print_mac_version(struct rtl8169_private *tp)
+{
+	struct {
+		int version;
+		char *msg;
+	} mac_print[] = {
+		{ RTL_GIGA_MAC_VER_E, "RTL_GIGA_MAC_VER_E" },
+		{ RTL_GIGA_MAC_VER_D, "RTL_GIGA_MAC_VER_D" },
+		{ RTL_GIGA_MAC_VER_B, "RTL_GIGA_MAC_VER_B" },
+		{ 0, NULL }
+	}, *p;
+
+	for (p = mac_print; p->msg; p++) {
+		if (tp->mac_version == p->version) {
+			dprintk("mac_version == %s (%04d)\n", p->msg,
+				  p->version);
+			return;
+		}
+	}
+	dprintk("mac_version == Unknown\n");
+}
+
+static void rtl8169_get_phy_version(struct rtl8169_private *tp, void *ioaddr)
+{
+	const struct {
+		u16 mask;
+		u16 set;
+		int phy_version;
+	} phy_info[] = {
+		{ 0x000f, 0x0002, RTL_GIGA_PHY_VER_G },
+		{ 0x000f, 0x0001, RTL_GIGA_PHY_VER_F },
+		{ 0x000f, 0x0000, RTL_GIGA_PHY_VER_E },
+		{ 0x0000, 0x0000, RTL_GIGA_PHY_VER_D } /* Catch-all */
+	}, *p = phy_info;
+	u16 reg;
+
+	reg = mdio_read(ioaddr, 3) & 0xffff;
+	while ((reg & p->mask) != p->set)
+		p++;
+	tp->phy_version = p->phy_version;
+}
+
+static void rtl8169_print_phy_version(struct rtl8169_private *tp)
+{
+	struct {
+		int version;
+		char *msg;
+		u32 reg;
+	} phy_print[] = {
+		{ RTL_GIGA_PHY_VER_G, "RTL_GIGA_PHY_VER_G", 0x0002 },
+		{ RTL_GIGA_PHY_VER_F, "RTL_GIGA_PHY_VER_F", 0x0001 },
+		{ RTL_GIGA_PHY_VER_E, "RTL_GIGA_PHY_VER_E", 0x0000 },
+		{ RTL_GIGA_PHY_VER_D, "RTL_GIGA_PHY_VER_D", 0x0000 },
+		{ 0, NULL, 0x0000 }
+	}, *p;
+
+	for (p = phy_print; p->msg; p++) {
+		if (tp->phy_version == p->version) {
+			dprintk("phy_version == %s (%04x)\n", p->msg, p->reg);
+			return;
+		}
+	}
+	dprintk("phy_version == Unknown\n");
+}
+
+static void rtl8169_hw_phy_config(struct net_device *dev)
+{
+	struct rtl8169_private *tp = dev->priv;
+	void *ioaddr = tp->mmio_addr;
+	struct {
+		u16 regs[5]; /* Beware of bit-sign propagation */
+	} phy_magic[5] = { {
+		{ 0x0000,	//w 4 15 12 0
+		  0x00a1,	//w 3 15 0 00a1
+		  0x0008,	//w 2 15 0 0008
+		  0x1020,	//w 1 15 0 1020
+		  0x1000 } },{	//w 0 15 0 1000
+		{ 0x7000,	//w 4 15 12 7
+		  0xff41,	//w 3 15 0 ff41
+		  0xde60,	//w 2 15 0 de60
+		  0x0140,	//w 1 15 0 0140
+		  0x0077 } },{	//w 0 15 0 0077
+		{ 0xa000,	//w 4 15 12 a
+		  0xdf01,	//w 3 15 0 df01
+		  0xdf20,	//w 2 15 0 df20
+		  0xff95,	//w 1 15 0 ff95
+		  0xfa00 } },{	//w 0 15 0 fa00
+		{ 0xb000,	//w 4 15 12 b
+		  0xff41,	//w 3 15 0 ff41
+		  0xde20,	//w 2 15 0 de20
+		  0x0140,	//w 1 15 0 0140
+		  0x00bb } },{	//w 0 15 0 00bb
+		{ 0xf000,	//w 4 15 12 f
+		  0xdf01,	//w 3 15 0 df01
+		  0xdf20,	//w 2 15 0 df20
+		  0xff95,	//w 1 15 0 ff95
+		  0xbf00 }	//w 0 15 0 bf00
+		}
+	}, *p = phy_magic;
+	int i;
+
+	rtl8169_print_mac_version(tp);
+	rtl8169_print_phy_version(tp);
+
+	if (tp->mac_version <= RTL_GIGA_MAC_VER_B)
+		return;
+	if (tp->phy_version >= RTL_GIGA_PHY_VER_F) 
+		return;
+
+	dprintk("MAC version != 0 && PHY version == 0 or 1\n");
+	dprintk("Do final_reg2.cfg\n");
+
+	/* Shazam ! */
+
+	// phy config for RTL8169s mac_version C chip
+	mdio_write(ioaddr, 31, 0x0001);			//w 31 2 0 1
+	mdio_write(ioaddr, 21, 0x1000);			//w 21 15 0 1000
+	mdio_write(ioaddr, 24, 0x65c7);			//w 24 15 0 65c7
+	rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0);	//w 4 11 11 0
+
+	for (i = 0; i < ARRAY_SIZE(phy_magic); i++, p++) {
+		int val, pos = 4;
+
+		val = (mdio_read(ioaddr, pos) & 0x0fff) | (p->regs[0] & 0xffff);
+		mdio_write(ioaddr, pos, val);
+		while (--pos >= 0)
+			mdio_write(ioaddr, pos, p->regs[4 - pos] & 0xffff);
+		rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 1); //w 4 11 11 1
+		rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0); //w 4 11 11 0
+	}
+	mdio_write(ioaddr, 31, 0x0000); //w 31 2 0 0
+}
+
+static void rtl8169_hw_phy_reset(struct net_device *dev)
+{
+	struct rtl8169_private *tp = dev->priv;
+	void *ioaddr = tp->mmio_addr;
+	int i, val;
+
+	printk(KERN_WARNING PFX "%s: Reset RTL8169s PHY\n", dev->name);
+
+	val = (mdio_read(ioaddr, 0) | 0x8000) & 0xffff;
+	mdio_write(ioaddr, 0, val);
+
+	for (i = 50; i >= 0; i--) {
+		if (!(mdio_read(ioaddr, 0) & 0x8000))
+			break;
+		udelay(100); /* Gross */
+	}
+
+	if (i < 0) {
+		printk(KERN_WARNING PFX "%s: no PHY Reset ack. Giving up.\n",
+		       dev->name);
+	}
+}
+
+static void rtl8169_phy_timer(unsigned long __opaque)
+{
+	struct net_device *dev = (struct net_device *)__opaque;
+	struct rtl8169_private *tp = dev->priv;
+	struct timer_list *timer = &tp->timer;
+	void *ioaddr = tp->mmio_addr;
+
+	assert(tp->mac_version > RTL_GIGA_MAC_VER_B);
+	assert(tp->phy_version < RTL_GIGA_PHY_VER_G);
+
+	if (RTL_R8(PHYstatus) & LinkStatus)
+		tp->phy_link_down_cnt = 0;
+	else {
+		tp->phy_link_down_cnt++;
+		if (tp->phy_link_down_cnt >= 12) {
+			int reg;
+
+			// If link on 1000, perform phy reset.
+			reg = mdio_read(ioaddr, PHY_1000_CTRL_REG);
+			if (reg & PHY_Cap_1000_Full) 
+				rtl8169_hw_phy_reset(dev);
+
+			tp->phy_link_down_cnt = 0;
+		}
+	}
+
+	mod_timer(timer, RTL8169_PHY_TIMEOUT);
+}
+
+static inline void rtl8169_delete_timer(struct net_device *dev)
+{
+	struct rtl8169_private *tp = dev->priv;
+	struct timer_list *timer = &tp->timer;
+
+	if ((tp->mac_version <= RTL_GIGA_MAC_VER_B) ||
+	    (tp->phy_version >= RTL_GIGA_PHY_VER_G))
+		return;
+
+	del_timer_sync(timer);
+
+	tp->phy_link_down_cnt = 0;
+}
+
+static inline void rtl8169_request_timer(struct net_device *dev)
+{
+	struct rtl8169_private *tp = dev->priv;
+	struct timer_list *timer = &tp->timer;
+
+	if ((tp->mac_version <= RTL_GIGA_MAC_VER_B) ||
+	    (tp->phy_version >= RTL_GIGA_PHY_VER_G))
+		return;
+
+	tp->phy_link_down_cnt = 0;
+
+	init_timer(timer);
+	timer->expires = jiffies + RTL8169_PHY_TIMEOUT;
+	timer->data = (unsigned long)(dev);
+	timer->function = rtl8169_phy_timer;
+	add_timer(timer);
+}
+
 static int __devinit
 rtl8169_init_board(struct pci_dev *pdev, struct net_device **dev_out,
 		   void **ioaddr_out)
@@ -356,9 +635,9 @@ rtl8169_init_board(struct pci_dev *pdev, struct net_device **dev_out,
 	void *ioaddr = NULL;
 	struct net_device *dev;
 	struct rtl8169_private *tp;
-	int rc, i;
 	unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
-	u32 tmp;
+	int rc, i, acpi_idle_state = 0, pm_cap;
+
 
 	assert(pdev != NULL);
 	assert(ioaddr_out != NULL);
@@ -379,8 +658,22 @@ rtl8169_init_board(struct pci_dev *pdev, struct net_device **dev_out,
 
 	// enable device (incl. PCI PM wakeup and hotplug setup)
 	rc = pci_enable_device(pdev);
-	if (rc)
+	if (rc) {
+		printk(KERN_ERR PFX "%s: unable to enable device\n", pdev->slot_name);
 		goto err_out;
+	}
+
+	/* save power state before pci_enable_device overwrites it */
+	pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);
+	if (pm_cap) {
+		u16 pwr_command;
+
+		pci_read_config_word(pdev, pm_cap + PCI_PM_CTRL, &pwr_command);
+		acpi_idle_state = pwr_command & PCI_PM_CTRL_STATE_MASK;
+	} else {
+		printk(KERN_ERR PFX "Cannot find PowerManagement capability, aborting.\n");
+		goto err_out_free_res;
+	}
 
 	mmio_start = pci_resource_start(pdev, 1);
 	mmio_end = pci_resource_end(pdev, 1);
@@ -402,8 +695,10 @@ rtl8169_init_board(struct pci_dev *pdev, struct net_device **dev_out,
 	}
 
 	rc = pci_request_regions(pdev, dev->name);
-	if (rc)
+	if (rc) {
+		printk(KERN_ERR PFX "%s: Could not request regions.\n", pdev->slot_name);
 		goto err_out_disable;
+	}
 
 	// enable PCI bus-mastering
 	pci_set_master(pdev);
@@ -420,30 +715,32 @@ rtl8169_init_board(struct pci_dev *pdev, struct net_device **dev_out,
 	RTL_W8(ChipCmd, CmdReset);
 
 	// Check that the chip has finished the reset.
-	for (i = 1000; i > 0; i--)
+	for (i = 1000; i > 0; i--) {
 		if ((RTL_R8(ChipCmd) & CmdReset) == 0)
 			break;
-		else
-			udelay(10);
+		udelay(10);
+	}
 
-	// identify chip attached to board
-	tmp = RTL_R32(TxConfig);
-	tmp = ((tmp & 0x7c000000) + ((tmp & 0x00800000) << 2)) >> 24;
+	// Identify chip attached to board
+	rtl8169_get_mac_version(tp, ioaddr);
+	rtl8169_get_phy_version(tp, ioaddr);
+
+	rtl8169_print_mac_version(tp);
+	rtl8169_print_phy_version(tp);
+
+	for (i = ARRAY_SIZE(rtl_chip_info) - 1; i >= 0; i--) {
+		if (tp->mac_version == rtl_chip_info[i].mac_version)
+			break;
+	}
+	if (i < 0) {
+		/* Unknown chip: assume array element #0, original RTL-8169 */
+		printk(KERN_DEBUG PFX
+		       "PCI device %s: unknown chip version, assuming %s\n",
+		       pci_name(pdev), rtl_chip_info[0].name);
+		i++;
+	}
+	tp->chipset = i;
 
-	for (i = ARRAY_SIZE(rtl_chip_info) - 1; i >= 0; i--)
-		if (tmp == rtl_chip_info[i].version) {
-			tp->chipset = i;
-			goto match;
-		}
-	//if unknown chip, assume array element #0, original RTL-8169 in this case
-	printk(KERN_DEBUG PFX
-	       "PCI device %s: unknown chip version, assuming RTL-8169\n",
-	       pci_name(pdev));
-	printk(KERN_DEBUG PFX "PCI device %s: TxConfig = 0x%lx\n",
-	       pci_name(pdev), (unsigned long) RTL_R32(TxConfig));
-	tp->chipset = 0;
-
-match:
 	*ioaddr_out = ioaddr;
 	*dev_out = dev;
 	return 0;
@@ -499,7 +796,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	dev->stop = rtl8169_close;
 	dev->tx_timeout = rtl8169_tx_timeout;
 	dev->set_multicast_list = rtl8169_set_rx_mode;
-	dev->watchdog_timeo = TX_TIMEOUT;
+	dev->watchdog_timeo = RTL8169_TX_TIMEOUT;
 	dev->irq = pdev->irq;
 	dev->base_addr = (unsigned long) ioaddr;
 //      dev->do_ioctl           = mii_ioctl;
@@ -528,12 +825,29 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	       "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
 	       "IRQ %d\n",
 	       dev->name,
-	       board_info[ent->driver_data].name,
+	       rtl_chip_info[ent->driver_data].name,
 	       dev->base_addr,
 	       dev->dev_addr[0], dev->dev_addr[1],
 	       dev->dev_addr[2], dev->dev_addr[3],
 	       dev->dev_addr[4], dev->dev_addr[5], dev->irq);
 
+	rtl8169_hw_phy_config(dev);
+
+	dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
+	RTL_W8(0x82, 0x01);
+
+	if (tp->mac_version < RTL_GIGA_MAC_VER_E) {
+		dprintk("Set PCI Latency=0x40\n");
+		pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
+	}
+
+	if (tp->mac_version == RTL_GIGA_MAC_VER_D) {
+		dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
+		RTL_W8(0x82, 0x01);
+		dprintk("Set PHY Reg 0x0bh = 0x00h\n");
+		mdio_write(ioaddr, 0x0b, 0x0000); //w 0x0b 15 0 0
+	}
+
 	// if TBI is not endbled
 	if (!(RTL_R8(PHYstatus) & TBI_Enable)) {
 		int val = mdio_read(ioaddr, PHY_AUTO_NEGO_REG);
@@ -546,23 +860,23 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 			Cap10_100 = 0, Cap1000 = 0;
 			switch (option) {
 			case _10_Half:
-				Cap10_100 = PHY_Cap_10_Half;
+				Cap10_100 = PHY_Cap_10_Half_Or_Less;
 				Cap1000 = PHY_Cap_Null;
 				break;
 			case _10_Full:
-				Cap10_100 = PHY_Cap_10_Full;
+				Cap10_100 = PHY_Cap_10_Full_Or_Less;
 				Cap1000 = PHY_Cap_Null;
 				break;
 			case _100_Half:
-				Cap10_100 = PHY_Cap_100_Half;
+				Cap10_100 = PHY_Cap_100_Half_Or_Less;
 				Cap1000 = PHY_Cap_Null;
 				break;
 			case _100_Full:
-				Cap10_100 = PHY_Cap_100_Full;
+				Cap10_100 = PHY_Cap_100_Full_Or_Less;
 				Cap1000 = PHY_Cap_Null;
 				break;
 			case _1000_Full:
-				Cap10_100 = PHY_Cap_Null;
+				Cap10_100 = PHY_Cap_100_Full_Or_Less;
 				Cap1000 = PHY_Cap_1000_Full;
 				break;
 			default:
@@ -576,9 +890,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 			// enable 10/100 Full/Half Mode, leave PHY_AUTO_NEGO_REG bit4:0 unchanged
 			mdio_write(ioaddr, PHY_AUTO_NEGO_REG,
-				   PHY_Cap_10_Half | PHY_Cap_10_Full |
-				   PHY_Cap_100_Half | PHY_Cap_100_Full | (val &
-									  0x1F));
+				   PHY_Cap_100_Full_Or_Less | (val & 0x1f));
 
 			// enable 1000 Full Mode
 			mdio_write(ioaddr, PHY_1000_CTRL_REG,
@@ -647,56 +959,96 @@ rtl8169_remove_one(struct pci_dev *pdev)
 	pci_set_drvdata(pdev, NULL);
 }
 
+#ifdef CONFIG_PM
+
+static int rtl8169_suspend(struct pci_dev *pdev, u32 state)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct rtl8169_private *tp = dev->priv;
+	void *ioaddr = tp->mmio_addr;
+	unsigned long flags;
+
+	if (!netif_running(dev))
+		return 0;
+	
+	netif_device_detach(dev);
+	netif_stop_queue(dev);
+	spin_lock_irqsave(&tp->lock, flags);
+
+	/* Disable interrupts, stop Rx and Tx */
+	RTL_W16(IntrMask, 0);
+	RTL_W8(ChipCmd, 0);
+		
+	/* Update the error counts. */
+	tp->stats.rx_missed_errors += RTL_R32(RxMissed);
+	RTL_W32(RxMissed, 0);
+	spin_unlock_irqrestore(&tp->lock, flags);
+	
+	return 0;
+}
+
+static int rtl8169_resume(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+
+	if (!netif_running(dev))
+	    return 0;
+
+	netif_device_attach(dev);
+	rtl8169_hw_start(dev);
+
+	return 0;
+}
+                                                                                
+#endif /* CONFIG_PM */
+
 static int
 rtl8169_open(struct net_device *dev)
 {
 	struct rtl8169_private *tp = dev->priv;
+	struct pci_dev *pdev = tp->pci_dev;
 	int retval;
-	u8 diff;
-	u32 TxPhyAddr, RxPhyAddr;
 
 	retval =
 	    request_irq(dev->irq, rtl8169_interrupt, SA_SHIRQ, dev->name, dev);
-	if (retval) {
-		return retval;
-	}
+	if (retval < 0)
+		goto out;
 
-	tp->TxDescArrays =
-	    kmalloc(NUM_TX_DESC * sizeof (struct TxDesc) + 256, GFP_KERNEL);
-	// Tx Desscriptor needs 256 bytes alignment;
-	TxPhyAddr = virt_to_bus(tp->TxDescArrays);
-	diff = 256 - (TxPhyAddr - ((TxPhyAddr >> 8) << 8));
-	TxPhyAddr += diff;
-	tp->TxDescArray = (struct TxDesc *) (tp->TxDescArrays + diff);
-
-	tp->RxDescArrays =
-	    kmalloc(NUM_RX_DESC * sizeof (struct RxDesc) + 256, GFP_KERNEL);
-	// Rx Desscriptor needs 256 bytes alignment;
-	RxPhyAddr = virt_to_bus(tp->RxDescArrays);
-	diff = 256 - (RxPhyAddr - ((RxPhyAddr >> 8) << 8));
-	RxPhyAddr += diff;
-	tp->RxDescArray = (struct RxDesc *) (tp->RxDescArrays + diff);
-
-	if (tp->TxDescArrays == NULL || tp->RxDescArrays == NULL) {
-		printk(KERN_INFO
-		       "Allocate RxDescArray or TxDescArray failed\n");
-		free_irq(dev->irq, dev);
-		if (tp->TxDescArrays)
-			kfree(tp->TxDescArrays);
-		if (tp->RxDescArrays)
-			kfree(tp->RxDescArrays);
-		return -ENOMEM;
-	}
-	tp->RxBufferRings = kmalloc(RX_BUF_SIZE * NUM_RX_DESC, GFP_KERNEL);
-	if (tp->RxBufferRings == NULL) {
-		printk(KERN_INFO "Allocate RxBufferRing failed\n");
-	}
+	retval = -ENOMEM;
 
-	rtl8169_init_ring(dev);
-	rtl8169_hw_start(dev);
+	/*
+	 * Rx and Tx desscriptors needs 256 bytes alignment.
+	 * pci_alloc_consistent provides more.
+	 */
+	tp->TxDescArray = pci_alloc_consistent(pdev, R8169_TX_RING_BYTES,
+					       &tp->TxPhyAddr);
+	if (!tp->TxDescArray)
+		goto err_free_irq;
 
-	return 0;
+	tp->RxDescArray = pci_alloc_consistent(pdev, R8169_RX_RING_BYTES,
+					       &tp->RxPhyAddr);
+	if (!tp->RxDescArray)
+		goto err_free_tx;
+
+	retval = rtl8169_init_ring(dev);
+	if (retval < 0)
+		goto err_free_rx;
 
+	rtl8169_hw_start(dev);
+
+	rtl8169_request_timer(dev);
+out:
+	return retval;
+
+err_free_rx:
+	pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
+			    tp->RxPhyAddr);
+err_free_tx:
+	pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
+			    tp->TxPhyAddr);
+err_free_irq:
+	free_irq(dev->irq, dev);
+	goto out;
 }
 
 static void
@@ -733,11 +1085,17 @@ rtl8169_hw_start(struct net_device *dev)
 	RTL_W32(TxConfig,
 		(TX_DMA_BURST << TxDMAShift) | (InterFrameGap <<
 						TxInterFrameGapShift));
+	RTL_W16(CPlusCmd, RTL_R16(CPlusCmd));
+
+	if (tp->mac_version == RTL_GIGA_MAC_VER_D) {
+		dprintk(KERN_INFO PFX "Set MAC Reg C+CR Offset 0xE0: bit-3 and bit-14 MUST be 1\n");
+		RTL_W16(CPlusCmd, RTL_R16(CPlusCmd) | (1 << 14) | (1 << 3));
+	}
 
 	tp->cur_rx = 0;
 
-	RTL_W32(TxDescStartAddr, virt_to_bus(tp->TxDescArray));
-	RTL_W32(RxDescStartAddr, virt_to_bus(tp->RxDescArray));
+	RTL_W32(TxDescStartAddr, tp->TxPhyAddr);
+	RTL_W32(RxDescStartAddr, tp->RxPhyAddr);
 	RTL_W8(Cfg9346, Cfg9346_Lock);
 	udelay(10);
 
@@ -755,31 +1113,131 @@ rtl8169_hw_start(struct net_device *dev)
 
 }
 
-static void
-rtl8169_init_ring(struct net_device *dev)
+static inline void rtl8169_make_unusable_by_asic(struct RxDesc *desc)
+{
+	desc->buf_addr = 0xdeadbeef;
+	desc->status &= ~cpu_to_le32(OWNbit | RsvdMask);
+}
+
+static void rtl8169_free_rx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff,
+				struct RxDesc *desc)
+{
+	pci_unmap_single(pdev, le32_to_cpu(desc->buf_addr), RX_BUF_SIZE,
+			 PCI_DMA_FROMDEVICE);
+	dev_kfree_skb(*sk_buff);
+	*sk_buff = NULL;
+	rtl8169_make_unusable_by_asic(desc);
+}
+
+static inline void rtl8169_return_to_asic(struct RxDesc *desc)
+{
+	desc->status |= cpu_to_le32(OWNbit + RX_BUF_SIZE);
+}
+
+static inline void rtl8169_give_to_asic(struct RxDesc *desc, dma_addr_t mapping)
+{
+	desc->buf_addr = cpu_to_le32(mapping);
+	desc->status |= cpu_to_le32(OWNbit + RX_BUF_SIZE);
+}
+
+static int rtl8169_alloc_rx_skb(struct pci_dev *pdev, struct net_device *dev,
+				struct sk_buff **sk_buff, struct RxDesc *desc)
+{
+	struct sk_buff *skb;
+	dma_addr_t mapping;
+	int ret = 0;
+
+	skb = dev_alloc_skb(RX_BUF_SIZE);
+	if (!skb)
+		goto err_out;
+
+	skb->dev = dev;
+	skb_reserve(skb, 2);
+	*sk_buff = skb;
+
+	mapping = pci_map_single(pdev, skb->tail, RX_BUF_SIZE,
+				 PCI_DMA_FROMDEVICE);
+
+	rtl8169_give_to_asic(desc, mapping);
+
+out:
+	return ret;
+
+err_out:
+	ret = -ENOMEM;
+	rtl8169_make_unusable_by_asic(desc);
+	goto out;
+}
+
+static void rtl8169_rx_clear(struct rtl8169_private *tp)
 {
-	struct rtl8169_private *tp = dev->priv;
 	int i;
 
-	tp->cur_rx = 0;
-	tp->cur_tx = 0;
-	tp->dirty_tx = 0;
+	for (i = 0; i < NUM_RX_DESC; i++) {
+		if (tp->Rx_skbuff[i]) {
+			rtl8169_free_rx_skb(tp->pci_dev, tp->Rx_skbuff + i,
+					    tp->RxDescArray + i);
+		}
+	}
+}
+
+static u32 rtl8169_rx_fill(struct rtl8169_private *tp, struct net_device *dev,
+			   u32 start, u32 end)
+{
+	u32 cur;
+	
+	for (cur = start; end - cur > 0; cur++) {
+		int ret, i = cur % NUM_RX_DESC;
+
+		if (tp->Rx_skbuff[i])
+			continue;
+			
+		ret = rtl8169_alloc_rx_skb(tp->pci_dev, dev, tp->Rx_skbuff + i,
+					   tp->RxDescArray + i);
+		if (ret < 0)
+			break;
+	}
+	return cur - start;
+}
+
+static inline void rtl8169_mark_as_last_descriptor(struct RxDesc *desc)
+{
+	desc->status |= cpu_to_le32(EORbit);
+}
+
+static int rtl8169_init_ring(struct net_device *dev)
+{
+	struct rtl8169_private *tp = dev->priv;
+
+	tp->cur_rx = tp->dirty_rx = 0;
+	tp->cur_tx = tp->dirty_tx = 0;
 	memset(tp->TxDescArray, 0x0, NUM_TX_DESC * sizeof (struct TxDesc));
 	memset(tp->RxDescArray, 0x0, NUM_RX_DESC * sizeof (struct RxDesc));
 
-	for (i = 0; i < NUM_TX_DESC; i++) {
-		tp->Tx_skbuff[i] = NULL;
-	}
-	for (i = 0; i < NUM_RX_DESC; i++) {
-		if (i == (NUM_RX_DESC - 1))
-			tp->RxDescArray[i].status =
-			    (OWNbit | EORbit) + RX_BUF_SIZE;
-		else
-			tp->RxDescArray[i].status = OWNbit + RX_BUF_SIZE;
+	memset(tp->Tx_skbuff, 0x0, NUM_TX_DESC * sizeof(struct sk_buff *));
+	memset(tp->Rx_skbuff, 0x0, NUM_RX_DESC * sizeof(struct sk_buff *));
 
-		tp->RxBufferRing[i] = &(tp->RxBufferRings[i * RX_BUF_SIZE]);
-		tp->RxDescArray[i].buf_addr = virt_to_bus(tp->RxBufferRing[i]);
-	}
+	if (rtl8169_rx_fill(tp, dev, 0, NUM_RX_DESC) != NUM_RX_DESC)
+		goto err_out;
+
+	rtl8169_mark_as_last_descriptor(tp->RxDescArray + NUM_RX_DESC - 1);
+
+	return 0;
+
+err_out:
+	rtl8169_rx_clear(tp);
+	return -ENOMEM;
+}
+
+static void rtl8169_unmap_tx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff,
+				 struct TxDesc *desc)
+{
+	u32 len = sk_buff[0]->len;
+
+	pci_unmap_single(pdev, le32_to_cpu(desc->buf_addr),
+			 len < ETH_ZLEN ? ETH_ZLEN : len, PCI_DMA_TODEVICE);
+	desc->buf_addr = 0x00;
+	*sk_buff = NULL;
 }
 
 static void
@@ -789,9 +1247,12 @@ rtl8169_tx_clear(struct rtl8169_private *tp)
 
 	tp->cur_tx = 0;
 	for (i = 0; i < NUM_TX_DESC; i++) {
-		if (tp->Tx_skbuff[i] != NULL) {
-			dev_kfree_skb(tp->Tx_skbuff[i]);
-			tp->Tx_skbuff[i] = NULL;
+		struct sk_buff *skb = tp->Tx_skbuff[i];
+
+		if (skb) {
+			rtl8169_unmap_tx_skb(tp->pci_dev, tp->Tx_skbuff + i,
+					     tp->TxDescArray + i);
+			dev_kfree_skb(skb);
 			tp->stats.tx_dropped++;
 		}
 	}
@@ -829,48 +1290,58 @@ rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	struct rtl8169_private *tp = dev->priv;
 	void *ioaddr = tp->mmio_addr;
 	int entry = tp->cur_tx % NUM_TX_DESC;
+	u32 len = skb->len;
 
-	if (skb->len < ETH_ZLEN) {
+	if (unlikely(skb->len < ETH_ZLEN)) {
 		skb = skb_padto(skb, ETH_ZLEN);
-		if (skb == NULL)
-			return 0;
+		if (!skb)
+			goto err_update_stats;
+		len = ETH_ZLEN;
 	}
 	
 	spin_lock_irq(&tp->lock);
 
-	if ((tp->TxDescArray[entry].status & OWNbit) == 0) {
+	if (!(le32_to_cpu(tp->TxDescArray[entry].status) & OWNbit)) {
+		dma_addr_t mapping;
+
+		mapping = pci_map_single(tp->pci_dev, skb->data, len,
+					 PCI_DMA_TODEVICE);
+
 		tp->Tx_skbuff[entry] = skb;
-		tp->TxDescArray[entry].buf_addr = virt_to_bus(skb->data);
-		if (entry != (NUM_TX_DESC - 1))
-			tp->TxDescArray[entry].status =
-			    (OWNbit | FSbit | LSbit) | ((skb->len > ETH_ZLEN) ?
-							skb->len : ETH_ZLEN);
-		else
-			tp->TxDescArray[entry].status =
-			    (OWNbit | EORbit | FSbit | LSbit) |
-			    ((skb->len > ETH_ZLEN) ? skb->len : ETH_ZLEN);
+		tp->TxDescArray[entry].buf_addr = cpu_to_le32(mapping);
 
+		tp->TxDescArray[entry].status = cpu_to_le32(OWNbit | FSbit |
+			LSbit | len | (EORbit * !((entry + 1) % NUM_TX_DESC)));
+			
 		RTL_W8(TxPoll, 0x40);	//set polling bit
 
 		dev->trans_start = jiffies;
 
 		tp->cur_tx++;
-	}
+	} else
+		goto err_drop;
 
-	spin_unlock_irq(&tp->lock);
 
 	if ((tp->cur_tx - NUM_TX_DESC) == tp->dirty_tx) {
 		netif_stop_queue(dev);
 	}
+out:
+	spin_unlock_irq(&tp->lock);
 
 	return 0;
+
+err_drop:
+	dev_kfree_skb(skb);
+err_update_stats:
+	tp->stats.tx_dropped++;
+	goto out;
 }
 
 static void
 rtl8169_tx_interrupt(struct net_device *dev, struct rtl8169_private *tp,
 		     void *ioaddr)
 {
-	unsigned long dirty_tx, tx_left = 0;
+	unsigned long dirty_tx, tx_left;
 
 	assert(dev != NULL);
 	assert(tp != NULL);
@@ -882,12 +1353,15 @@ rtl8169_tx_interrupt(struct net_device *dev, struct rtl8169_private *tp,
 	while (tx_left > 0) {
 		int entry = dirty_tx % NUM_TX_DESC;
 
-		if ((tp->TxDescArray[entry].status & OWNbit) == 0) {
+		if (!(le32_to_cpu(tp->TxDescArray[entry].status) & OWNbit)) {
 			struct sk_buff *skb = tp->Tx_skbuff[entry];
 
+			/* FIXME: is it really accurate for TxErr ? */
 			tp->stats.tx_bytes += skb->len >= ETH_ZLEN ?
 					      skb->len : ETH_ZLEN;
 			tp->stats.tx_packets++;
+			rtl8169_unmap_tx_skb(tp->pci_dev, tp->Tx_skbuff + entry,
+					     tp->TxDescArray + entry);
 			dev_kfree_skb_irq(skb);
 			tp->Tx_skbuff[entry] = NULL;
 			dirty_tx++;
@@ -902,70 +1376,102 @@ rtl8169_tx_interrupt(struct net_device *dev, struct rtl8169_private *tp,
 	}
 }
 
+static inline int rtl8169_try_rx_copy(struct sk_buff **sk_buff, int pkt_size,
+				      struct RxDesc *desc,
+				      struct net_device *dev)
+{
+	int ret = -1;
+
+	if (pkt_size < rx_copybreak) {
+		struct sk_buff *skb;
+
+		skb = dev_alloc_skb(pkt_size + 2);
+		if (skb) {
+			skb->dev = dev;
+			skb_reserve(skb, 2);
+			eth_copy_and_sum(skb, sk_buff[0]->tail, pkt_size, 0);
+			*sk_buff = skb;
+			rtl8169_return_to_asic(desc);
+			ret = 0;
+		}
+	}
+	return ret;
+}
+
 static void
 rtl8169_rx_interrupt(struct net_device *dev, struct rtl8169_private *tp,
 		     void *ioaddr)
 {
-	int cur_rx;
-	struct sk_buff *skb;
-	int pkt_size = 0;
+	unsigned long cur_rx, rx_left;
+	int delta;
 
 	assert(dev != NULL);
 	assert(tp != NULL);
 	assert(ioaddr != NULL);
 
 	cur_rx = tp->cur_rx;
+	rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
 
-	while ((tp->RxDescArray[cur_rx].status & OWNbit) == 0) {
+	while (rx_left > 0) {
+		int entry = cur_rx % NUM_RX_DESC;
+		u32 status = le32_to_cpu(tp->RxDescArray[entry].status);
 
-		if (tp->RxDescArray[cur_rx].status & RxRES) {
+		if (status & OWNbit)
+			break;
+		if (status & RxRES) {
 			printk(KERN_INFO "%s: Rx ERROR!!!\n", dev->name);
 			tp->stats.rx_errors++;
-			if (tp->RxDescArray[cur_rx].status & (RxRWT | RxRUNT))
+			if (status & (RxRWT | RxRUNT))
 				tp->stats.rx_length_errors++;
-			if (tp->RxDescArray[cur_rx].status & RxCRC)
+			if (status & RxCRC)
 				tp->stats.rx_crc_errors++;
 		} else {
-			pkt_size =
-			    (int) (tp->RxDescArray[cur_rx].
-				   status & 0x00001FFF) - 4;
-			skb = dev_alloc_skb(pkt_size + 2);
-			if (skb != NULL) {
-				skb->dev = dev;
-				skb_reserve(skb, 2);	// 16 byte align the IP fields. //
-				eth_copy_and_sum(skb, tp->RxBufferRing[cur_rx],
-						 pkt_size, 0);
-				skb_put(skb, pkt_size);
-				skb->protocol = eth_type_trans(skb, dev);
-				netif_rx(skb);
-
-				if (cur_rx == (NUM_RX_DESC - 1))
-					tp->RxDescArray[cur_rx].status =
-					    (OWNbit | EORbit) + RX_BUF_SIZE;
-				else
-					tp->RxDescArray[cur_rx].status =
-					    OWNbit + RX_BUF_SIZE;
-
-				tp->RxDescArray[cur_rx].buf_addr =
-				    virt_to_bus(tp->RxBufferRing[cur_rx]);
-				dev->last_rx = jiffies;
-				tp->stats.rx_bytes += pkt_size;
-				tp->stats.rx_packets++;
-			} else {
-				printk(KERN_WARNING
-				       "%s: Memory squeeze, deferring packet.\n",
-				       dev->name);
-				/* We should check that some rx space is free.
-				   If not, free one and mark stats->rx_dropped++. */
-				tp->stats.rx_dropped++;
+			struct RxDesc *desc = tp->RxDescArray + entry;
+			struct sk_buff *skb = tp->Rx_skbuff[entry];
+			int pkt_size = (status & 0x00001FFF) - 4;
+
+			pci_dma_sync_single(tp->pci_dev,
+					    le32_to_cpu(desc->buf_addr),
+					    RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+
+			if (rtl8169_try_rx_copy(&skb, pkt_size, desc, dev)) {
+				pci_unmap_single(tp->pci_dev,
+						 le32_to_cpu(desc->buf_addr),
+						 RX_BUF_SIZE,
+						 PCI_DMA_FROMDEVICE);
+				tp->Rx_skbuff[entry] = NULL;
 			}
-		}
 
-		cur_rx = (cur_rx + 1) % NUM_RX_DESC;
+			skb_put(skb, pkt_size);
+			skb->protocol = eth_type_trans(skb, dev);
+			netif_rx(skb);
 
+			dev->last_rx = jiffies;
+			tp->stats.rx_bytes += pkt_size;
+			tp->stats.rx_packets++;
+		}
+		
+		cur_rx++; 
+		rx_left--;
 	}
 
 	tp->cur_rx = cur_rx;
+
+	delta = rtl8169_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);
+	if (delta > 0)
+		tp->dirty_rx += delta;
+	else if (delta < 0)
+		printk(KERN_INFO "%s: no Rx buffer allocated\n", dev->name);
+
+	/*
+	 * FIXME: until there is periodic timer to try and refill the ring,
+	 * a temporary shortage may definitely kill the Rx process.
+	 * - disable the asic to try and avoid an overflow and kick it again
+	 *   after refill ?
+	 * - how do others driver handle this condition (Uh oh...).
+	 */
+	if (tp->dirty_rx + NUM_RX_DESC == tp->cur_rx)
+		printk(KERN_EMERG "%s: Rx buffers exhausted\n", dev->name);
 }
 
 /* The interrupt handler does all of the Rx thread work and cleans up after the Tx thread. */
@@ -994,9 +1500,7 @@ rtl8169_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
 		RTL_W16(IntrStatus,
 			(status & RxFIFOOver) ? (status | RxOverflow) : status);
 
-		if ((status &
-		     (SYSErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver
-		      | TxErr | TxOK | RxErr | RxOK)) == 0)
+		if (!(status & rtl8169_intr_mask))
 			break;
 
 		// Rx interrupt 
@@ -1026,11 +1530,13 @@ static int
 rtl8169_close(struct net_device *dev)
 {
 	struct rtl8169_private *tp = dev->priv;
+	struct pci_dev *pdev = tp->pci_dev;
 	void *ioaddr = tp->mmio_addr;
-	int i;
 
 	netif_stop_queue(dev);
 
+	rtl8169_delete_timer(dev);
+
 	spin_lock_irq(&tp->lock);
 
 	/* Stop the chip's Tx and Rx DMA processes. */
@@ -1049,16 +1555,15 @@ rtl8169_close(struct net_device *dev)
 	free_irq(dev->irq, dev);
 
 	rtl8169_tx_clear(tp);
-	kfree(tp->TxDescArrays);
-	kfree(tp->RxDescArrays);
-	tp->TxDescArrays = NULL;
-	tp->RxDescArrays = NULL;
+
+	rtl8169_rx_clear(tp);
+
+	pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
+			    tp->RxPhyAddr);
+	pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
+			    tp->TxPhyAddr);
 	tp->TxDescArray = NULL;
 	tp->RxDescArray = NULL;
-	kfree(tp->RxBufferRings);
-	for (i = 0; i < NUM_RX_DESC; i++) {
-		tp->RxBufferRing[i] = NULL;
-	}
 
 	return 0;
 }
@@ -1112,11 +1617,26 @@ rtl8169_set_rx_mode(struct net_device *dev)
 	spin_unlock_irqrestore(&tp->lock, flags);
 }
 
+/**
+ *  rtl8169_get_stats - Get rtl8169 read/write statistics
+ *  @dev: The Ethernet Device to get statistics for
+ *
+ *  Get TX/RX statistics for rtl8169
+ */
 struct net_device_stats *
 rtl8169_get_stats(struct net_device *dev)
 {
 	struct rtl8169_private *tp = dev->priv;
+	void *ioaddr = tp->mmio_addr;
+	unsigned long flags;
 
+	if (netif_running(dev)) {
+		spin_lock_irqsave(&tp->lock, flags);
+		tp->stats.rx_missed_errors += RTL_R32(RxMissed);
+		RTL_W32(RxMissed, 0);
+		spin_unlock_irqrestore(&tp->lock, flags);
+	}
+		
 	return &tp->stats;
 }
 
@@ -1125,8 +1645,10 @@ static struct pci_driver rtl8169_pci_driver = {
 	.id_table	= rtl8169_pci_tbl,
 	.probe		= rtl8169_init_one,
 	.remove		= __devexit_p(rtl8169_remove_one),
-	.suspend	= NULL,
-	.resume		= NULL,
+#ifdef CONFIG_PM
+	.suspend	= rtl8169_suspend,
+	.resume		= rtl8169_resume,
+#endif
 };
 
 static int __init