drivers/net/r8169.c

   1 /*
   2  * r8169.c: RealTek 8169/8168/8101 ethernet driver.
   3  *
   4  * Copyright (c) 2002 ShuChen <shuchen@realtek.com.tw>
   5  * Copyright (c) 2003 - 2007 Francois Romieu <romieu@fr.zoreil.com>
   6  * Copyright (c) a lot of people too. Please respect their work.
   7  *
   8  * See MAINTAINERS file for support contact information.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/pci.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/etherdevice.h>
  16 #include <linux/delay.h>
  17 #include <linux/ethtool.h>
  18 #include <linux/mii.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/crc32.h>
  21 #include <linux/in.h>
  22 #include <linux/ip.h>
  23 #include <linux/tcp.h>
  24 #include <linux/init.h>
  25 #include <linux/dma-mapping.h>
  26
  27 #include <asm/system.h>
  28 #include <asm/io.h>
  29 #include <asm/irq.h>
  30
  31 #ifdef CONFIG_R8169_NAPI
  32 #define NAPI_SUFFIX     "-NAPI"
  33 #else
  34 #define NAPI_SUFFIX     ""
  35 #endif
  36
  37 #define RTL8169_VERSION "2.2LK" NAPI_SUFFIX
  38 #define MODULENAME "r8169"
  39 #define PFX MODULENAME ": "
  40
  41 #ifdef RTL8169_DEBUG
  42 #define assert(expr) \
  43         if (!(expr)) {                                  \
  44                 printk( "Assertion failed! %s,%s,%s,line=%d\n", \
  45                 #expr,__FILE__,__FUNCTION__,__LINE__);          \
  46         }
  47 #define dprintk(fmt, args...) \
  48         do { printk(KERN_DEBUG PFX fmt, ## args); } while (0)
  49 #else
  50 #define assert(expr) do {} while (0)
  51 #define dprintk(fmt, args...)   do {} while (0)
  52 #endif /* RTL8169_DEBUG */
  53
  54 #define R8169_MSG_DEFAULT \
  55         (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN)
  56
  57 #define TX_BUFFS_AVAIL(tp) \
  58         (tp->dirty_tx + NUM_TX_DESC - tp->cur_tx - 1)
  59
  60 #ifdef CONFIG_R8169_NAPI
  61 #define rtl8169_rx_skb                  netif_receive_skb
  62 #define rtl8169_rx_hwaccel_skb          vlan_hwaccel_receive_skb
  63 #define rtl8169_rx_quota(count, quota)  min(count, quota)
  64 #else
  65 #define rtl8169_rx_skb                  netif_rx
  66 #define rtl8169_rx_hwaccel_skb          vlan_hwaccel_rx
  67 #define rtl8169_rx_quota(count, quota)  count
  68 #endif
  69
  70 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
  71 static const int max_interrupt_work = 20;
  72
  73 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
  74    The RTL chips use a 64 element hash table based on the Ethernet CRC. */
  75 static const int multicast_filter_limit = 32;
  76
  77 /* MAC address length */
  78 #define MAC_ADDR_LEN    6
  79
  80 #define RX_FIFO_THRESH  7       /* 7 means NO threshold, Rx buffer level before first PCI xfer. */
  81 #define RX_DMA_BURST    6       /* Maximum PCI burst, '6' is 1024 */
  82 #define TX_DMA_BURST    6       /* Maximum PCI burst, '6' is 1024 */
  83 #define EarlyTxThld     0x3F    /* 0x3F means NO early transmit */
  84 #define RxPacketMaxSize 0x3FE8  /* 16K - 1 - ETH_HLEN - VLAN - CRC... */
  85 #define SafeMtu         0x1c20  /* ... actually life sucks beyond ~7k */
  86 #define InterFrameGap   0x03    /* 3 means InterFrameGap = the shortest one */
  87
  88 #define R8169_REGS_SIZE         256
  89 #define R8169_NAPI_WEIGHT       64
  90 #define NUM_TX_DESC     64      /* Number of Tx descriptor registers */
  91 #define NUM_RX_DESC     256     /* Number of Rx descriptor registers */
  92 #define RX_BUF_SIZE     1536    /* Rx Buffer size */
  93 #define R8169_TX_RING_BYTES     (NUM_TX_DESC * sizeof(struct TxDesc))
  94 #define R8169_RX_RING_BYTES     (NUM_RX_DESC * sizeof(struct RxDesc))
  95
  96 #define RTL8169_TX_TIMEOUT      (6*HZ)
  97 #define RTL8169_PHY_TIMEOUT     (10*HZ)
  98
  99 /* write/read MMIO register */
 100 #define RTL_W8(reg, val8)       writeb ((val8), ioaddr + (reg))
 101 #define RTL_W16(reg, val16)     writew ((val16), ioaddr + (reg))
 102 #define RTL_W32(reg, val32)     writel ((val32), ioaddr + (reg))
 103 #define RTL_R8(reg)             readb (ioaddr + (reg))
 104 #define RTL_R16(reg)            readw (ioaddr + (reg))
 105 #define RTL_R32(reg)            ((unsigned long) readl (ioaddr + (reg)))
 106
 107 enum mac_version {
 108         RTL_GIGA_MAC_VER_01 = 0x01, // 8169
 109         RTL_GIGA_MAC_VER_02 = 0x02, // 8169S
 110         RTL_GIGA_MAC_VER_03 = 0x03, // 8110S
 111         RTL_GIGA_MAC_VER_04 = 0x04, // 8169SB
 112         RTL_GIGA_MAC_VER_05 = 0x05, // 8110SCd
 113         RTL_GIGA_MAC_VER_06 = 0x06, // 8110SCe
 114         RTL_GIGA_MAC_VER_11 = 0x0b, // 8168Bb
 115         RTL_GIGA_MAC_VER_12 = 0x0c, // 8168Be
 116         RTL_GIGA_MAC_VER_13 = 0x0d, // 8101Eb
 117         RTL_GIGA_MAC_VER_14 = 0x0e, // 8101 ?
 118         RTL_GIGA_MAC_VER_15 = 0x0f, // 8101 ?
 119         RTL_GIGA_MAC_VER_16 = 0x11, // 8101Ec
 120         RTL_GIGA_MAC_VER_17 = 0x10, // 8168Bf
 121         RTL_GIGA_MAC_VER_18 = 0x12, // 8168CP
 122         RTL_GIGA_MAC_VER_19 = 0x13, // 8168C
 123         RTL_GIGA_MAC_VER_20 = 0x14  // 8168C
 124 };
 125
 126 #define _R(NAME,MAC,MASK) \
 127         { .name = NAME, .mac_version = MAC, .RxConfigMask = MASK }
 128
 129 static const struct {
 130         const char *name;
 131         u8 mac_version;
 132         u32 RxConfigMask;       /* Clears the bits supported by this chip */
 133 } rtl_chip_info[] = {
 134         _R("RTL8169",           RTL_GIGA_MAC_VER_01, 0xff7e1880), // 8169
 135         _R("RTL8169s",          RTL_GIGA_MAC_VER_02, 0xff7e1880), // 8169S
 136         _R("RTL8110s",          RTL_GIGA_MAC_VER_03, 0xff7e1880), // 8110S
 137         _R("RTL8169sb/8110sb",  RTL_GIGA_MAC_VER_04, 0xff7e1880), // 8169SB
 138         _R("RTL8169sc/8110sc",  RTL_GIGA_MAC_VER_05, 0xff7e1880), // 8110SCd
 139         _R("RTL8169sc/8110sc",  RTL_GIGA_MAC_VER_06, 0xff7e1880), // 8110SCe
 140         _R("RTL8168b/8111b",    RTL_GIGA_MAC_VER_11, 0xff7e1880), // PCI-E
 141         _R("RTL8168b/8111b",    RTL_GIGA_MAC_VER_12, 0xff7e1880), // PCI-E
 142         _R("RTL8101e",          RTL_GIGA_MAC_VER_13, 0xff7e1880), // PCI-E 8139
 143         _R("RTL8100e",          RTL_GIGA_MAC_VER_14, 0xff7e1880), // PCI-E 8139
 144         _R("RTL8100e",          RTL_GIGA_MAC_VER_15, 0xff7e1880), // PCI-E 8139
 145         _R("RTL8168b/8111b",    RTL_GIGA_MAC_VER_17, 0xff7e1880), // PCI-E
 146         _R("RTL8101e",          RTL_GIGA_MAC_VER_16, 0xff7e1880), // PCI-E
 147         _R("RTL8168cp/8111cp",  RTL_GIGA_MAC_VER_18, 0xff7e1880), // PCI-E
 148         _R("RTL8168c/8111c",    RTL_GIGA_MAC_VER_19, 0xff7e1880), // PCI-E
 149         _R("RTL8168c/8111c",    RTL_GIGA_MAC_VER_20, 0xff7e1880)  // PCI-E
 150 };
 151 #undef _R
 152
 153 enum cfg_version {
 154         RTL_CFG_0 = 0x00,
 155         RTL_CFG_1,
 156         RTL_CFG_2
 157 };
 158
 159 static void rtl_hw_start_8169(struct net_device *);
 160 static void rtl_hw_start_8168(struct net_device *);
 161 static void rtl_hw_start_8101(struct net_device *);
 162
 163 static struct pci_device_id rtl8169_pci_tbl[] = {
 164         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8129), 0, 0, RTL_CFG_0 },
 165         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8136), 0, 0, RTL_CFG_2 },
 166         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8167), 0, 0, RTL_CFG_0 },
 167         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8168), 0, 0, RTL_CFG_1 },
 168         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8169), 0, 0, RTL_CFG_0 },
 169         { PCI_DEVICE(PCI_VENDOR_ID_DLINK,       0x4300), 0, 0, RTL_CFG_0 },
 170         { PCI_DEVICE(PCI_VENDOR_ID_AT,          0xc107), 0, 0, RTL_CFG_0 },
 171         { PCI_DEVICE(0x16ec,                    0x0116), 0, 0, RTL_CFG_0 },
 172         { PCI_VENDOR_ID_LINKSYS,                0x1032,
 173                 PCI_ANY_ID, 0x0024, 0, 0, RTL_CFG_0 },
 174         {0,},
 175 };
 176
 177 MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl);
 178
 179 static int rx_copybreak = 200;
 180 static int use_dac;
 181 static struct {
 182         u32 msg_enable;
 183 } debug = { -1 };
 184
 185 enum rtl_registers {
 186         MAC0            = 0,    /* Ethernet hardware address. */
 187         MAC4            = 4,
 188         MAR0            = 8,    /* Multicast filter. */
 189         CounterAddrLow          = 0x10,
 190         CounterAddrHigh         = 0x14,
 191         TxDescStartAddrLow      = 0x20,
 192         TxDescStartAddrHigh     = 0x24,
 193         TxHDescStartAddrLow     = 0x28,
 194         TxHDescStartAddrHigh    = 0x2c,
 195         FLASH           = 0x30,
 196         ERSR            = 0x36,
 197         ChipCmd         = 0x37,
 198         TxPoll          = 0x38,
 199         IntrMask        = 0x3c,
 200         IntrStatus      = 0x3e,
 201         TxConfig        = 0x40,
 202         RxConfig        = 0x44,
 203         RxMissed        = 0x4c,
 204         Cfg9346         = 0x50,
 205         Config0         = 0x51,
 206         Config1         = 0x52,
 207         Config2         = 0x53,
 208         Config3         = 0x54,
 209         Config4         = 0x55,
 210         Config5         = 0x56,
 211         MultiIntr       = 0x5c,
 212         PHYAR           = 0x60,
 213         TBICSR          = 0x64,
 214         TBI_ANAR        = 0x68,
 215         TBI_LPAR        = 0x6a,
 216         PHYstatus       = 0x6c,
 217         RxMaxSize       = 0xda,
 218         CPlusCmd        = 0xe0,
 219         IntrMitigate    = 0xe2,
 220         RxDescAddrLow   = 0xe4,
 221         RxDescAddrHigh  = 0xe8,
 222         EarlyTxThres    = 0xec,
 223         FuncEvent       = 0xf0,
 224         FuncEventMask   = 0xf4,
 225         FuncPresetState = 0xf8,
 226         FuncForceEvent  = 0xfc,
 227 };
 228
 229 enum rtl_register_content {
 230         /* InterruptStatusBits */
 231         SYSErr          = 0x8000,
 232         PCSTimeout      = 0x4000,
 233         SWInt           = 0x0100,
 234         TxDescUnavail   = 0x0080,
 235         RxFIFOOver      = 0x0040,
 236         LinkChg         = 0x0020,
 237         RxOverflow      = 0x0010,
 238         TxErr           = 0x0008,
 239         TxOK            = 0x0004,
 240         RxErr           = 0x0002,
 241         RxOK            = 0x0001,
 242
 243         /* RxStatusDesc */
 244         RxFOVF  = (1 << 23),
 245         RxRWT   = (1 << 22),
 246         RxRES   = (1 << 21),
 247         RxRUNT  = (1 << 20),
 248         RxCRC   = (1 << 19),
 249
 250         /* ChipCmdBits */
 251         CmdReset        = 0x10,
 252         CmdRxEnb        = 0x08,
 253         CmdTxEnb        = 0x04,
 254         RxBufEmpty      = 0x01,
 255
 256         /* TXPoll register p.5 */
 257         HPQ             = 0x80,         /* Poll cmd on the high prio queue */
 258         NPQ             = 0x40,         /* Poll cmd on the low prio queue */
 259         FSWInt          = 0x01,         /* Forced software interrupt */
 260
 261         /* Cfg9346Bits */
 262         Cfg9346_Lock    = 0x00,
 263         Cfg9346_Unlock  = 0xc0,
 264
 265         /* rx_mode_bits */
 266         AcceptErr       = 0x20,
 267         AcceptRunt      = 0x10,
 268         AcceptBroadcast = 0x08,
 269         AcceptMulticast = 0x04,
 270         AcceptMyPhys    = 0x02,
 271         AcceptAllPhys   = 0x01,
 272
 273         /* RxConfigBits */
 274         RxCfgFIFOShift  = 13,
 275         RxCfgDMAShift   =  8,
 276
 277         /* TxConfigBits */
 278         TxInterFrameGapShift = 24,
 279         TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
 280
 281         /* Config1 register p.24 */
 282         MSIEnable       = (1 << 5),     /* Enable Message Signaled Interrupt */
 283         PMEnable        = (1 << 0),     /* Power Management Enable */
 284
 285         /* Config2 register p. 25 */
 286         PCI_Clock_66MHz = 0x01,
 287         PCI_Clock_33MHz = 0x00,
 288
 289         /* Config3 register p.25 */
 290         MagicPacket     = (1 << 5),     /* Wake up when receives a Magic Packet */
 291         LinkUp          = (1 << 4),     /* Wake up when the cable connection is re-established */
 292
 293         /* Config5 register p.27 */
 294         BWF             = (1 << 6),     /* Accept Broadcast wakeup frame */
 295         MWF             = (1 << 5),     /* Accept Multicast wakeup frame */
 296         UWF             = (1 << 4),     /* Accept Unicast wakeup frame */
 297         LanWake         = (1 << 1),     /* LanWake enable/disable */
 298         PMEStatus       = (1 << 0),     /* PME status can be reset by PCI RST# */
 299
 300         /* TBICSR p.28 */
 301         TBIReset        = 0x80000000,
 302         TBILoopback     = 0x40000000,
 303         TBINwEnable     = 0x20000000,
 304         TBINwRestart    = 0x10000000,
 305         TBILinkOk       = 0x02000000,
 306         TBINwComplete   = 0x01000000,
 307
 308         /* CPlusCmd p.31 */
 309         PktCntrDisable  = (1 << 7),     // 8168
 310         RxVlan          = (1 << 6),
 311         RxChkSum        = (1 << 5),
 312         PCIDAC          = (1 << 4),
 313         PCIMulRW        = (1 << 3),
 314         INTT_0          = 0x0000,       // 8168
 315         INTT_1          = 0x0001,       // 8168
 316         INTT_2          = 0x0002,       // 8168
 317         INTT_3          = 0x0003,       // 8168
 318
 319         /* rtl8169_PHYstatus */
 320         TBI_Enable      = 0x80,
 321         TxFlowCtrl      = 0x40,
 322         RxFlowCtrl      = 0x20,
 323         _1000bpsF       = 0x10,
 324         _100bps         = 0x08,
 325         _10bps          = 0x04,
 326         LinkStatus      = 0x02,
 327         FullDup         = 0x01,
 328
 329         /* _TBICSRBit */
 330         TBILinkOK       = 0x02000000,
 331
 332         /* DumpCounterCommand */
 333         CounterDump     = 0x8,
 334 };
 335
 336 enum desc_status_bit {
 337         DescOwn         = (1 << 31), /* Descriptor is owned by NIC */
 338         RingEnd         = (1 << 30), /* End of descriptor ring */
 339         FirstFrag       = (1 << 29), /* First segment of a packet */
 340         LastFrag        = (1 << 28), /* Final segment of a packet */
 341
 342         /* Tx private */
 343         LargeSend       = (1 << 27), /* TCP Large Send Offload (TSO) */
 344         MSSShift        = 16,        /* MSS value position */
 345         MSSMask         = 0xfff,     /* MSS value + LargeSend bit: 12 bits */
 346         IPCS            = (1 << 18), /* Calculate IP checksum */
 347         UDPCS           = (1 << 17), /* Calculate UDP/IP checksum */
 348         TCPCS           = (1 << 16), /* Calculate TCP/IP checksum */
 349         TxVlanTag       = (1 << 17), /* Add VLAN tag */
 350
 351         /* Rx private */
 352         PID1            = (1 << 18), /* Protocol ID bit 1/2 */
 353         PID0            = (1 << 17), /* Protocol ID bit 2/2 */
 354
 355 #define RxProtoUDP      (PID1)
 356 #define RxProtoTCP      (PID0)
 357 #define RxProtoIP       (PID1 | PID0)
 358 #define RxProtoMask     RxProtoIP
 359
 360         IPFail          = (1 << 16), /* IP checksum failed */
 361         UDPFail         = (1 << 15), /* UDP/IP checksum failed */
 362         TCPFail         = (1 << 14), /* TCP/IP checksum failed */
 363         RxVlanTag       = (1 << 16), /* VLAN tag available */
 364 };
 365
 366 #define RsvdMask        0x3fffc000
 367
 368 struct TxDesc {
 369         __le32 opts1;
 370         __le32 opts2;
 371         __le64 addr;
 372 };
 373
 374 struct RxDesc {
 375         __le32 opts1;
 376         __le32 opts2;
 377         __le64 addr;
 378 };
 379
 380 struct ring_info {
 381         struct sk_buff  *skb;
 382         u32             len;
 383         u8              __pad[sizeof(void *) - sizeof(u32)];
 384 };
 385
 386 enum features {
 387         RTL_FEATURE_WOL = (1 << 0),
 388         RTL_FEATURE_MSI = (1 << 1),
 389 };
 390
 391 struct rtl8169_private {
 392         void __iomem *mmio_addr;        /* memory map physical address */
 393         struct pci_dev *pci_dev;        /* Index of PCI device */
 394         struct net_device *dev;
 395         struct napi_struct napi;
 396         spinlock_t lock;                /* spin lock flag */
 397         u32 msg_enable;
 398         int chipset;
 399         int mac_version;
 400         u32 cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
 401         u32 cur_tx; /* Index into the Tx descriptor buffer of next Rx pkt. */
 402         u32 dirty_rx;
 403         u32 dirty_tx;
 404         struct TxDesc *TxDescArray;     /* 256-aligned Tx descriptor ring */
 405         struct RxDesc *RxDescArray;     /* 256-aligned Rx descriptor ring */
 406         dma_addr_t TxPhyAddr;
 407         dma_addr_t RxPhyAddr;
 408         struct sk_buff *Rx_skbuff[NUM_RX_DESC]; /* Rx data buffers */
 409         struct ring_info tx_skb[NUM_TX_DESC];   /* Tx data buffers */
 410         unsigned align;
 411         unsigned rx_buf_sz;
 412         struct timer_list timer;
 413         u16 cp_cmd;
 414         u16 intr_event;
 415         u16 napi_event;
 416         u16 intr_mask;
 417         int phy_auto_nego_reg;
 418         int phy_1000_ctrl_reg;
 419 #ifdef CONFIG_R8169_VLAN
 420         struct vlan_group *vlgrp;
 421 #endif
 422         int (*set_speed)(struct net_device *, u8 autoneg, u16 speed, u8 duplex);
 423         void (*get_settings)(struct net_device *, struct ethtool_cmd *);
 424         void (*phy_reset_enable)(void __iomem *);
 425         void (*hw_start)(struct net_device *);
 426         unsigned int (*phy_reset_pending)(void __iomem *);
 427         unsigned int (*link_ok)(void __iomem *);
 428         struct delayed_work task;
 429         unsigned features;
 430 };
 431
 432 MODULE_AUTHOR("Realtek and the Linux r8169 crew <netdev@vger.kernel.org>");
 433 MODULE_DESCRIPTION("RealTek RTL-8169 Gigabit Ethernet driver");
 434 module_param(rx_copybreak, int, 0);
 435 MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
 436 module_param(use_dac, int, 0);
 437 MODULE_PARM_DESC(use_dac, "Enable PCI DAC. Unsafe on 32 bit PCI slot.");
 438 module_param_named(debug, debug.msg_enable, int, 0);
 439 MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
 440 MODULE_LICENSE("GPL");
 441 MODULE_VERSION(RTL8169_VERSION);
 442
 443 static int rtl8169_open(struct net_device *dev);
 444 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev);
 445 static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance);
 446 static int rtl8169_init_ring(struct net_device *dev);
 447 static void rtl_hw_start(struct net_device *dev);
 448 static int rtl8169_close(struct net_device *dev);
 449 static void rtl_set_rx_mode(struct net_device *dev);
 450 static void rtl8169_tx_timeout(struct net_device *dev);
 451 static struct net_device_stats *rtl8169_get_stats(struct net_device *dev);
 452 static int rtl8169_rx_interrupt(struct net_device *, struct rtl8169_private *,
 453                                 void __iomem *, u32 budget);
 454 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu);
 455 static void rtl8169_down(struct net_device *dev);
 456 static void rtl8169_rx_clear(struct rtl8169_private *tp);
 457
 458 #ifdef CONFIG_R8169_NAPI
 459 static int rtl8169_poll(struct napi_struct *napi, int budget);
 460 #endif
 461
 462 static const unsigned int rtl8169_rx_config =
 463         (RX_FIFO_THRESH << RxCfgFIFOShift) | (RX_DMA_BURST << RxCfgDMAShift);
 464
 465 static void mdio_write(void __iomem *ioaddr, int reg_addr, int value)
 466 {
 467         int i;
 468
 469         RTL_W32(PHYAR, 0x80000000 | (reg_addr & 0xFF) << 16 | value);
 470
 471         for (i = 20; i > 0; i--) {
 472                 /*
 473                  * Check if the RTL8169 has completed writing to the specified
 474                  * MII register.
 475                  */
 476                 if (!(RTL_R32(PHYAR) & 0x80000000))
 477                         break;
 478                 udelay(25);
 479         }
 480 }
 481
 482 static int mdio_read(void __iomem *ioaddr, int reg_addr)
 483 {
 484         int i, value = -1;
 485
 486         RTL_W32(PHYAR, 0x0 | (reg_addr & 0xFF) << 16);
 487
 488         for (i = 20; i > 0; i--) {
 489                 /*
 490                  * Check if the RTL8169 has completed retrieving data from
 491                  * the specified MII register.
 492                  */
 493                 if (RTL_R32(PHYAR) & 0x80000000) {
 494                         value = (int) (RTL_R32(PHYAR) & 0xFFFF);
 495                         break;
 496                 }
 497                 udelay(25);
 498         }
 499         return value;
 500 }
 501
 502 static void rtl8169_irq_mask_and_ack(void __iomem *ioaddr)
 503 {
 504         RTL_W16(IntrMask, 0x0000);
 505
 506         RTL_W16(IntrStatus, 0xffff);
 507 }
 508
 509 static void rtl8169_asic_down(void __iomem *ioaddr)
 510 {
 511         RTL_W8(ChipCmd, 0x00);
 512         rtl8169_irq_mask_and_ack(ioaddr);
 513         RTL_R16(CPlusCmd);
 514 }
 515
 516 static unsigned int rtl8169_tbi_reset_pending(void __iomem *ioaddr)
 517 {
 518         return RTL_R32(TBICSR) & TBIReset;
 519 }
 520
 521 static unsigned int rtl8169_xmii_reset_pending(void __iomem *ioaddr)
 522 {
 523         return mdio_read(ioaddr, MII_BMCR) & BMCR_RESET;
 524 }
 525
 526 static unsigned int rtl8169_tbi_link_ok(void __iomem *ioaddr)
 527 {
 528         return RTL_R32(TBICSR) & TBILinkOk;
 529 }
 530
 531 static unsigned int rtl8169_xmii_link_ok(void __iomem *ioaddr)
 532 {
 533         return RTL_R8(PHYstatus) & LinkStatus;
 534 }
 535
 536 static void rtl8169_tbi_reset_enable(void __iomem *ioaddr)
 537 {
 538         RTL_W32(TBICSR, RTL_R32(TBICSR) | TBIReset);
 539 }
 540
 541 static void rtl8169_xmii_reset_enable(void __iomem *ioaddr)
 542 {
 543         unsigned int val;
 544
 545         val = mdio_read(ioaddr, MII_BMCR) | BMCR_RESET;
 546         mdio_write(ioaddr, MII_BMCR, val & 0xffff);
 547 }
 548
 549 static void rtl8169_check_link_status(struct net_device *dev,
 550                                       struct rtl8169_private *tp,
 551                                       void __iomem *ioaddr)
 552 {
 553         unsigned long flags;
 554
 555         spin_lock_irqsave(&tp->lock, flags);
 556         if (tp->link_ok(ioaddr)) {
 557                 netif_carrier_on(dev);
 558                 if (netif_msg_ifup(tp))
 559                         printk(KERN_INFO PFX "%s: link up\n", dev->name);
 560         } else {
 561                 if (netif_msg_ifdown(tp))
 562                         printk(KERN_INFO PFX "%s: link down\n", dev->name);
 563                 netif_carrier_off(dev);
 564         }
 565         spin_unlock_irqrestore(&tp->lock, flags);
 566 }
 567
 568 static void rtl8169_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 569 {
 570         struct rtl8169_private *tp = netdev_priv(dev);
 571         void __iomem *ioaddr = tp->mmio_addr;
 572         u8 options;
 573
 574         wol->wolopts = 0;
 575
 576 #define WAKE_ANY (WAKE_PHY | WAKE_MAGIC | WAKE_UCAST | WAKE_BCAST | WAKE_MCAST)
 577         wol->supported = WAKE_ANY;
 578
 579         spin_lock_irq(&tp->lock);
 580
 581         options = RTL_R8(Config1);
 582         if (!(options & PMEnable))
 583                 goto out_unlock;
 584
 585         options = RTL_R8(Config3);
 586         if (options & LinkUp)
 587                 wol->wolopts |= WAKE_PHY;
 588         if (options & MagicPacket)
 589                 wol->wolopts |= WAKE_MAGIC;
 590
 591         options = RTL_R8(Config5);
 592         if (options & UWF)
 593                 wol->wolopts |= WAKE_UCAST;
 594         if (options & BWF)
 595                 wol->wolopts |= WAKE_BCAST;
 596         if (options & MWF)
 597                 wol->wolopts |= WAKE_MCAST;
 598
 599 out_unlock:
 600         spin_unlock_irq(&tp->lock);
 601 }
 602
 603 static int rtl8169_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 604 {
 605         struct rtl8169_private *tp = netdev_priv(dev);
 606         void __iomem *ioaddr = tp->mmio_addr;
 607         unsigned int i;
 608         static struct {
 609                 u32 opt;
 610                 u16 reg;
 611                 u8  mask;
 612         } cfg[] = {
 613                 { WAKE_ANY,   Config1, PMEnable },
 614                 { WAKE_PHY,   Config3, LinkUp },
 615                 { WAKE_MAGIC, Config3, MagicPacket },
 616                 { WAKE_UCAST, Config5, UWF },
 617                 { WAKE_BCAST, Config5, BWF },
 618                 { WAKE_MCAST, Config5, MWF },
 619                 { WAKE_ANY,   Config5, LanWake }
 620         };
 621
 622         spin_lock_irq(&tp->lock);
 623
 624         RTL_W8(Cfg9346, Cfg9346_Unlock);
 625
 626         for (i = 0; i < ARRAY_SIZE(cfg); i++) {
 627                 u8 options = RTL_R8(cfg[i].reg) & ~cfg[i].mask;
 628                 if (wol->wolopts & cfg[i].opt)
 629                         options |= cfg[i].mask;
 630                 RTL_W8(cfg[i].reg, options);
 631         }
 632
 633         RTL_W8(Cfg9346, Cfg9346_Lock);
 634
 635         if (wol->wolopts)
 636                 tp->features |= RTL_FEATURE_WOL;
 637         else
 638                 tp->features &= ~RTL_FEATURE_WOL;
 639
 640         spin_unlock_irq(&tp->lock);
 641
 642         return 0;
 643 }
 644
 645 static void rtl8169_get_drvinfo(struct net_device *dev,
 646                                 struct ethtool_drvinfo *info)
 647 {
 648         struct rtl8169_private *tp = netdev_priv(dev);
 649
 650         strcpy(info->driver, MODULENAME);
 651         strcpy(info->version, RTL8169_VERSION);
 652         strcpy(info->bus_info, pci_name(tp->pci_dev));
 653 }
 654
 655 static int rtl8169_get_regs_len(struct net_device *dev)
 656 {
 657         return R8169_REGS_SIZE;
 658 }
 659
 660 static int rtl8169_set_speed_tbi(struct net_device *dev,
 661                                  u8 autoneg, u16 speed, u8 duplex)
 662 {
 663         struct rtl8169_private *tp = netdev_priv(dev);
 664         void __iomem *ioaddr = tp->mmio_addr;
 665         int ret = 0;
 666         u32 reg;
 667
 668         reg = RTL_R32(TBICSR);
 669         if ((autoneg == AUTONEG_DISABLE) && (speed == SPEED_1000) &&
 670             (duplex == DUPLEX_FULL)) {
 671                 RTL_W32(TBICSR, reg & ~(TBINwEnable | TBINwRestart));
 672         } else if (autoneg == AUTONEG_ENABLE)
 673                 RTL_W32(TBICSR, reg | TBINwEnable | TBINwRestart);
 674         else {
 675                 if (netif_msg_link(tp)) {
 676                         printk(KERN_WARNING "%s: "
 677                                "incorrect speed setting refused in TBI mode\n",
 678                                dev->name);
 679                 }
 680                 ret = -EOPNOTSUPP;
 681         }
 682
 683         return ret;
 684 }
 685
 686 static int rtl8169_set_speed_xmii(struct net_device *dev,
 687                                   u8 autoneg, u16 speed, u8 duplex)
 688 {
 689         struct rtl8169_private *tp = netdev_priv(dev);
 690         void __iomem *ioaddr = tp->mmio_addr;
 691         int auto_nego, giga_ctrl;
 692
 693         auto_nego = mdio_read(ioaddr, MII_ADVERTISE);
 694         auto_nego &= ~(ADVERTISE_10HALF | ADVERTISE_10FULL |
 695                        ADVERTISE_100HALF | ADVERTISE_100FULL);
 696         giga_ctrl = mdio_read(ioaddr, MII_CTRL1000);
 697         giga_ctrl &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 698
 699         if (autoneg == AUTONEG_ENABLE) {
 700                 auto_nego |= (ADVERTISE_10HALF | ADVERTISE_10FULL |
 701                               ADVERTISE_100HALF | ADVERTISE_100FULL);
 702                 giga_ctrl |= ADVERTISE_1000FULL | ADVERTISE_1000HALF;
 703         } else {
 704                 if (speed == SPEED_10)
 705                         auto_nego |= ADVERTISE_10HALF | ADVERTISE_10FULL;
 706                 else if (speed == SPEED_100)
 707                         auto_nego |= ADVERTISE_100HALF | ADVERTISE_100FULL;
 708                 else if (speed == SPEED_1000)
 709                         giga_ctrl |= ADVERTISE_1000FULL | ADVERTISE_1000HALF;
 710
 711                 if (duplex == DUPLEX_HALF)
 712                         auto_nego &= ~(ADVERTISE_10FULL | ADVERTISE_100FULL);
 713
 714                 if (duplex == DUPLEX_FULL)
 715                         auto_nego &= ~(ADVERTISE_10HALF | ADVERTISE_100HALF);
 716
 717                 /* This tweak comes straight from Realtek's driver. */
 718                 if ((speed == SPEED_100) && (duplex == DUPLEX_HALF) &&
 719                     ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
 720                      (tp->mac_version == RTL_GIGA_MAC_VER_16))) {
 721                         auto_nego = ADVERTISE_100HALF | ADVERTISE_CSMA;
 722                 }
 723         }
 724
 725         /* The 8100e/8101e do Fast Ethernet only. */
 726         if ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
 727             (tp->mac_version == RTL_GIGA_MAC_VER_14) ||
 728             (tp->mac_version == RTL_GIGA_MAC_VER_15) ||
 729             (tp->mac_version == RTL_GIGA_MAC_VER_16)) {
 730                 if ((giga_ctrl & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)) &&
 731                     netif_msg_link(tp)) {
 732                         printk(KERN_INFO "%s: PHY does not support 1000Mbps.\n",
 733                                dev->name);
 734                 }
 735                 giga_ctrl &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 736         }
 737
 738         auto_nego |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 739
 740         if ((tp->mac_version == RTL_GIGA_MAC_VER_12) ||
 741             (tp->mac_version == RTL_GIGA_MAC_VER_17)) {
 742                 /* Vendor specific (0x1f) and reserved (0x0e) MII registers. */
 743                 mdio_write(ioaddr, 0x1f, 0x0000);
 744                 mdio_write(ioaddr, 0x0e, 0x0000);
 745         }
 746
 747         tp->phy_auto_nego_reg = auto_nego;
 748         tp->phy_1000_ctrl_reg = giga_ctrl;
 749
 750         mdio_write(ioaddr, MII_ADVERTISE, auto_nego);
 751         mdio_write(ioaddr, MII_CTRL1000, giga_ctrl);
 752         mdio_write(ioaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
 753         return 0;
 754 }
 755
 756 static int rtl8169_set_speed(struct net_device *dev,
 757                              u8 autoneg, u16 speed, u8 duplex)
 758 {
 759         struct rtl8169_private *tp = netdev_priv(dev);
 760         int ret;
 761
 762         ret = tp->set_speed(dev, autoneg, speed, duplex);
 763
 764         if (netif_running(dev) && (tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL))
 765                 mod_timer(&tp->timer, jiffies + RTL8169_PHY_TIMEOUT);
 766
 767         return ret;
 768 }
 769
 770 static int rtl8169_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 771 {
 772         struct rtl8169_private *tp = netdev_priv(dev);
 773         unsigned long flags;
 774         int ret;
 775
 776         spin_lock_irqsave(&tp->lock, flags);
 777         ret = rtl8169_set_speed(dev, cmd->autoneg, cmd->speed, cmd->duplex);
 778         spin_unlock_irqrestore(&tp->lock, flags);
 779
 780         return ret;
 781 }
 782
 783 static u32 rtl8169_get_rx_csum(struct net_device *dev)
 784 {
 785         struct rtl8169_private *tp = netdev_priv(dev);
 786
 787         return tp->cp_cmd & RxChkSum;
 788 }
 789
 790 static int rtl8169_set_rx_csum(struct net_device *dev, u32 data)
 791 {
 792         struct rtl8169_private *tp = netdev_priv(dev);
 793         void __iomem *ioaddr = tp->mmio_addr;
 794         unsigned long flags;
 795
 796         spin_lock_irqsave(&tp->lock, flags);
 797
 798         if (data)
 799                 tp->cp_cmd |= RxChkSum;
 800         else
 801                 tp->cp_cmd &= ~RxChkSum;
 802
 803         RTL_W16(CPlusCmd, tp->cp_cmd);
 804         RTL_R16(CPlusCmd);
 805
 806         spin_unlock_irqrestore(&tp->lock, flags);
 807
 808         return 0;
 809 }
 810
 811 #ifdef CONFIG_R8169_VLAN
 812
 813 static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
 814                                       struct sk_buff *skb)
 815 {
 816         return (tp->vlgrp && vlan_tx_tag_present(skb)) ?
 817                 TxVlanTag | swab16(vlan_tx_tag_get(skb)) : 0x00;
 818 }
 819
 820 static void rtl8169_vlan_rx_register(struct net_device *dev,
 821                                      struct vlan_group *grp)
 822 {
 823         struct rtl8169_private *tp = netdev_priv(dev);
 824         void __iomem *ioaddr = tp->mmio_addr;
 825         unsigned long flags;
 826
 827         spin_lock_irqsave(&tp->lock, flags);
 828         tp->vlgrp = grp;
 829         if (tp->vlgrp)
 830                 tp->cp_cmd |= RxVlan;
 831         else
 832                 tp->cp_cmd &= ~RxVlan;
 833         RTL_W16(CPlusCmd, tp->cp_cmd);
 834         RTL_R16(CPlusCmd);
 835         spin_unlock_irqrestore(&tp->lock, flags);
 836 }
 837
 838 static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc,
 839                                struct sk_buff *skb)
 840 {
 841         u32 opts2 = le32_to_cpu(desc->opts2);
 842         int ret;
 843
 844         if (tp->vlgrp && (opts2 & RxVlanTag)) {
 845                 rtl8169_rx_hwaccel_skb(skb, tp->vlgrp, swab16(opts2 & 0xffff));
 846                 ret = 0;
 847         } else
 848                 ret = -1;
 849         desc->opts2 = 0;
 850         return ret;
 851 }
 852
 853 #else /* !CONFIG_R8169_VLAN */
 854
 855 static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
 856                                       struct sk_buff *skb)
 857 {
 858         return 0;
 859 }
 860
 861 static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc,
 862                                struct sk_buff *skb)
 863 {
 864         return -1;
 865 }
 866
 867 #endif
 868
 869 static void rtl8169_gset_tbi(struct net_device *dev, struct ethtool_cmd *cmd)
 870 {
 871         struct rtl8169_private *tp = netdev_priv(dev);
 872         void __iomem *ioaddr = tp->mmio_addr;
 873         u32 status;
 874
 875         cmd->supported =
 876                 SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE;
 877         cmd->port = PORT_FIBRE;
 878         cmd->transceiver = XCVR_INTERNAL;
 879
 880         status = RTL_R32(TBICSR);
 881         cmd->advertising = (status & TBINwEnable) ?  ADVERTISED_Autoneg : 0;
 882         cmd->autoneg = !!(status & TBINwEnable);
 883
 884         cmd->speed = SPEED_1000;
 885         cmd->duplex = DUPLEX_FULL; /* Always set */
 886 }
 887
 888 static void rtl8169_gset_xmii(struct net_device *dev, struct ethtool_cmd *cmd)
 889 {
 890         struct rtl8169_private *tp = netdev_priv(dev);
 891         void __iomem *ioaddr = tp->mmio_addr;
 892         u8 status;
 893
 894         cmd->supported = SUPPORTED_10baseT_Half |
 895                          SUPPORTED_10baseT_Full |
 896                          SUPPORTED_100baseT_Half |
 897                          SUPPORTED_100baseT_Full |
 898                          SUPPORTED_1000baseT_Full |
 899                          SUPPORTED_Autoneg |
 900                          SUPPORTED_TP;
 901
 902         cmd->autoneg = 1;
 903         cmd->advertising = ADVERTISED_TP | ADVERTISED_Autoneg;
 904
 905         if (tp->phy_auto_nego_reg & ADVERTISE_10HALF)
 906                 cmd->advertising |= ADVERTISED_10baseT_Half;
 907         if (tp->phy_auto_nego_reg & ADVERTISE_10FULL)
 908                 cmd->advertising |= ADVERTISED_10baseT_Full;
 909         if (tp->phy_auto_nego_reg & ADVERTISE_100HALF)
 910                 cmd->advertising |= ADVERTISED_100baseT_Half;
 911         if (tp->phy_auto_nego_reg & ADVERTISE_100FULL)
 912                 cmd->advertising |= ADVERTISED_100baseT_Full;
 913         if (tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL)
 914                 cmd->advertising |= ADVERTISED_1000baseT_Full;
 915
 916         status = RTL_R8(PHYstatus);
 917
 918         if (status & _1000bpsF)
 919                 cmd->speed = SPEED_1000;
 920         else if (status & _100bps)
 921                 cmd->speed = SPEED_100;
 922         else if (status & _10bps)
 923                 cmd->speed = SPEED_10;
 924
 925         if (status & TxFlowCtrl)
 926                 cmd->advertising |= ADVERTISED_Asym_Pause;
 927         if (status & RxFlowCtrl)
 928                 cmd->advertising |= ADVERTISED_Pause;
 929
 930         cmd->duplex = ((status & _1000bpsF) || (status & FullDup)) ?
 931                       DUPLEX_FULL : DUPLEX_HALF;
 932 }
 933
 934 static int rtl8169_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 935 {
 936         struct rtl8169_private *tp = netdev_priv(dev);
 937         unsigned long flags;
 938
 939         spin_lock_irqsave(&tp->lock, flags);
 940
 941         tp->get_settings(dev, cmd);
 942
 943         spin_unlock_irqrestore(&tp->lock, flags);
 944         return 0;
 945 }
 946
 947 static void rtl8169_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 948                              void *p)
 949 {
 950         struct rtl8169_private *tp = netdev_priv(dev);
 951         unsigned long flags;
 952
 953         if (regs->len > R8169_REGS_SIZE)
 954                 regs->len = R8169_REGS_SIZE;
 955
 956         spin_lock_irqsave(&tp->lock, flags);
 957         memcpy_fromio(p, tp->mmio_addr, regs->len);
 958         spin_unlock_irqrestore(&tp->lock, flags);
 959 }
 960
 961 static u32 rtl8169_get_msglevel(struct net_device *dev)
 962 {
 963         struct rtl8169_private *tp = netdev_priv(dev);
 964
 965         return tp->msg_enable;
 966 }
 967
 968 static void rtl8169_set_msglevel(struct net_device *dev, u32 value)
 969 {
 970         struct rtl8169_private *tp = netdev_priv(dev);
 971
 972         tp->msg_enable = value;
 973 }
 974
 975 static const char rtl8169_gstrings[][ETH_GSTRING_LEN] = {
 976         "tx_packets",
 977         "rx_packets",
 978         "tx_errors",
 979         "rx_errors",
 980         "rx_missed",
 981         "align_errors",
 982         "tx_single_collisions",
 983         "tx_multi_collisions",
 984         "unicast",
 985         "broadcast",
 986         "multicast",
 987         "tx_aborted",
 988         "tx_underrun",
 989 };
 990
 991 struct rtl8169_counters {
 992         __le64  tx_packets;
 993         __le64  rx_packets;
 994         __le64  tx_errors;
 995         __le32  rx_errors;
 996         __le16  rx_missed;
 997         __le16  align_errors;
 998         __le32  tx_one_collision;
 999         __le32  tx_multi_collision;
1000         __le64  rx_unicast;
1001         __le64  rx_broadcast;
1002         __le32  rx_multicast;
1003         __le16  tx_aborted;
1004         __le16  tx_underun;
1005 };
1006
1007 static int rtl8169_get_sset_count(struct net_device *dev, int sset)
1008 {
1009         switch (sset) {
1010         case ETH_SS_STATS:
1011                 return ARRAY_SIZE(rtl8169_gstrings);
1012         default:
1013                 return -EOPNOTSUPP;
1014         }
1015 }
1016
1017 static void rtl8169_get_ethtool_stats(struct net_device *dev,
1018                                       struct ethtool_stats *stats, u64 *data)
1019 {
1020         struct rtl8169_private *tp = netdev_priv(dev);
1021         void __iomem *ioaddr = tp->mmio_addr;
1022         struct rtl8169_counters *counters;
1023         dma_addr_t paddr;
1024         u32 cmd;
1025
1026         ASSERT_RTNL();
1027
1028         counters = pci_alloc_consistent(tp->pci_dev, sizeof(*counters), &paddr);
1029         if (!counters)
1030                 return;
1031
1032         RTL_W32(CounterAddrHigh, (u64)paddr >> 32);
1033         cmd = (u64)paddr & DMA_32BIT_MASK;
1034         RTL_W32(CounterAddrLow, cmd);
1035         RTL_W32(CounterAddrLow, cmd | CounterDump);
1036
1037         while (RTL_R32(CounterAddrLow) & CounterDump) {
1038                 if (msleep_interruptible(1))
1039                         break;
1040         }
1041
1042         RTL_W32(CounterAddrLow, 0);
1043         RTL_W32(CounterAddrHigh, 0);
1044
1045         data[0] = le64_to_cpu(counters->tx_packets);
1046         data[1] = le64_to_cpu(counters->rx_packets);
1047         data[2] = le64_to_cpu(counters->tx_errors);
1048         data[3] = le32_to_cpu(counters->rx_errors);
1049         data[4] = le16_to_cpu(counters->rx_missed);
1050         data[5] = le16_to_cpu(counters->align_errors);
1051         data[6] = le32_to_cpu(counters->tx_one_collision);
1052         data[7] = le32_to_cpu(counters->tx_multi_collision);
1053         data[8] = le64_to_cpu(counters->rx_unicast);
1054         data[9] = le64_to_cpu(counters->rx_broadcast);
1055         data[10] = le32_to_cpu(counters->rx_multicast);
1056         data[11] = le16_to_cpu(counters->tx_aborted);
1057         data[12] = le16_to_cpu(counters->tx_underun);
1058
1059         pci_free_consistent(tp->pci_dev, sizeof(*counters), counters, paddr);
1060 }
1061
1062 static void rtl8169_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1063 {
1064         switch(stringset) {
1065         case ETH_SS_STATS:
1066                 memcpy(data, *rtl8169_gstrings, sizeof(rtl8169_gstrings));
1067                 break;
1068         }
1069 }
1070
1071 static const struct ethtool_ops rtl8169_ethtool_ops = {
1072         .get_drvinfo            = rtl8169_get_drvinfo,
1073         .get_regs_len           = rtl8169_get_regs_len,
1074         .get_link               = ethtool_op_get_link,
1075         .get_settings           = rtl8169_get_settings,
1076         .set_settings           = rtl8169_set_settings,
1077         .get_msglevel           = rtl8169_get_msglevel,
1078         .set_msglevel           = rtl8169_set_msglevel,
1079         .get_rx_csum            = rtl8169_get_rx_csum,
1080         .set_rx_csum            = rtl8169_set_rx_csum,
1081         .set_tx_csum            = ethtool_op_set_tx_csum,
1082         .set_sg                 = ethtool_op_set_sg,
1083         .set_tso                = ethtool_op_set_tso,
1084         .get_regs               = rtl8169_get_regs,
1085         .get_wol                = rtl8169_get_wol,
1086         .set_wol                = rtl8169_set_wol,
1087         .get_strings            = rtl8169_get_strings,
1088         .get_sset_count         = rtl8169_get_sset_count,
1089         .get_ethtool_stats      = rtl8169_get_ethtool_stats,
1090 };
1091
1092 static void rtl8169_write_gmii_reg_bit(void __iomem *ioaddr, int reg,
1093                                        int bitnum, int bitval)
1094 {
1095         int val;
1096
1097         val = mdio_read(ioaddr, reg);
1098         val = (bitval == 1) ?
1099                 val | (bitval << bitnum) :  val & ~(0x0001 << bitnum);
1100         mdio_write(ioaddr, reg, val & 0xffff);
1101 }
1102
1103 static void rtl8169_get_mac_version(struct rtl8169_private *tp,
1104                                     void __iomem *ioaddr)
1105 {
1106         /*
1107          * The driver currently handles the 8168Bf and the 8168Be identically
1108          * but they can be identified more specifically through the test below
1109          * if needed:
1110          *
1111          * (RTL_R32(TxConfig) & 0x700000) == 0x500000 ? 8168Bf : 8168Be
1112          *
1113          * Same thing for the 8101Eb and the 8101Ec:
1114          *
1115          * (RTL_R32(TxConfig) & 0x700000) == 0x200000 ? 8101Eb : 8101Ec
1116          */
1117         const struct {
1118                 u32 mask;
1119                 u32 val;
1120                 int mac_version;
1121         } mac_info[] = {
1122                 /* 8168B family. */
1123                 { 0x7c800000, 0x3c800000,       RTL_GIGA_MAC_VER_18 },
1124                 { 0x7cf00000, 0x3c000000,       RTL_GIGA_MAC_VER_19 },
1125                 { 0x7cf00000, 0x3c200000,       RTL_GIGA_MAC_VER_20 },
1126                 { 0x7c800000, 0x3c000000,       RTL_GIGA_MAC_VER_20 },
1127
1128                 /* 8168B family. */
1129                 { 0x7cf00000, 0x38000000,       RTL_GIGA_MAC_VER_12 },
1130                 { 0x7cf00000, 0x38500000,       RTL_GIGA_MAC_VER_17 },
1131                 { 0x7c800000, 0x38000000,       RTL_GIGA_MAC_VER_17 },
1132                 { 0x7c800000, 0x30000000,       RTL_GIGA_MAC_VER_11 },
1133
1134                 /* 8101 family. */
1135                 { 0x7cf00000, 0x34000000,       RTL_GIGA_MAC_VER_13 },
1136                 { 0x7cf00000, 0x34200000,       RTL_GIGA_MAC_VER_16 },
1137                 { 0x7c800000, 0x34000000,       RTL_GIGA_MAC_VER_16 },
1138                 /* FIXME: where did these entries come from ? -- FR */
1139                 { 0xfc800000, 0x38800000,       RTL_GIGA_MAC_VER_15 },
1140                 { 0xfc800000, 0x30800000,       RTL_GIGA_MAC_VER_14 },
1141
1142                 /* 8110 family. */
1143                 { 0xfc800000, 0x98000000,       RTL_GIGA_MAC_VER_06 },
1144                 { 0xfc800000, 0x18000000,       RTL_GIGA_MAC_VER_05 },
1145                 { 0xfc800000, 0x10000000,       RTL_GIGA_MAC_VER_04 },
1146                 { 0xfc800000, 0x04000000,       RTL_GIGA_MAC_VER_03 },
1147                 { 0xfc800000, 0x00800000,       RTL_GIGA_MAC_VER_02 },
1148                 { 0xfc800000, 0x00000000,       RTL_GIGA_MAC_VER_01 },
1149
1150                 { 0x00000000, 0x00000000,       RTL_GIGA_MAC_VER_01 }   /* Catch-all */
1151         }, *p = mac_info;
1152         u32 reg;
1153
1154         reg = RTL_R32(TxConfig);
1155         while ((reg & p->mask) != p->val)
1156                 p++;
1157         tp->mac_version = p->mac_version;
1158
1159         if (p->mask == 0x00000000) {
1160                 struct pci_dev *pdev = tp->pci_dev;
1161
1162                 dev_info(&pdev->dev, "unknown MAC (%08x)\n", reg);
1163         }
1164 }
1165
1166 static void rtl8169_print_mac_version(struct rtl8169_private *tp)
1167 {
1168         dprintk("mac_version = 0x%02x\n", tp->mac_version);
1169 }
1170
1171 struct phy_reg {
1172         u16 reg;
1173         u16 val;
1174 };
1175
1176 static void rtl_phy_write(void __iomem *ioaddr, struct phy_reg *regs, int len)
1177 {
1178         while (len-- > 0) {
1179                 mdio_write(ioaddr, regs->reg, regs->val);
1180                 regs++;
1181         }
1182 }
1183
1184 static void rtl8169s_hw_phy_config(void __iomem *ioaddr)
1185 {
1186         struct {
1187                 u16 regs[5]; /* Beware of bit-sign propagation */
1188         } phy_magic[5] = { {
1189                 { 0x0000,       //w 4 15 12 0
1190                   0x00a1,       //w 3 15 0 00a1
1191                   0x0008,       //w 2 15 0 0008
1192                   0x1020,       //w 1 15 0 1020
1193                   0x1000 } },{  //w 0 15 0 1000
1194                 { 0x7000,       //w 4 15 12 7
1195                   0xff41,       //w 3 15 0 ff41
1196                   0xde60,       //w 2 15 0 de60
1197                   0x0140,       //w 1 15 0 0140
1198                   0x0077 } },{  //w 0 15 0 0077
1199                 { 0xa000,       //w 4 15 12 a
1200                   0xdf01,       //w 3 15 0 df01
1201                   0xdf20,       //w 2 15 0 df20
1202                   0xff95,       //w 1 15 0 ff95
1203                   0xfa00 } },{  //w 0 15 0 fa00
1204                 { 0xb000,       //w 4 15 12 b
1205                   0xff41,       //w 3 15 0 ff41
1206                   0xde20,       //w 2 15 0 de20
1207                   0x0140,       //w 1 15 0 0140
1208                   0x00bb } },{  //w 0 15 0 00bb
1209                 { 0xf000,       //w 4 15 12 f
1210                   0xdf01,       //w 3 15 0 df01
1211                   0xdf20,       //w 2 15 0 df20
1212                   0xff95,       //w 1 15 0 ff95
1213                   0xbf00 }      //w 0 15 0 bf00
1214                 }
1215         }, *p = phy_magic;
1216         unsigned int i;
1217
1218         mdio_write(ioaddr, 0x1f, 0x0001);               //w 31 2 0 1
1219         mdio_write(ioaddr, 0x15, 0x1000);               //w 21 15 0 1000
1220         mdio_write(ioaddr, 0x18, 0x65c7);               //w 24 15 0 65c7
1221         rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0);   //w 4 11 11 0
1222
1223         for (i = 0; i < ARRAY_SIZE(phy_magic); i++, p++) {
1224                 int val, pos = 4;
1225
1226                 val = (mdio_read(ioaddr, pos) & 0x0fff) | (p->regs[0] & 0xffff);
1227                 mdio_write(ioaddr, pos, val);
1228                 while (--pos >= 0)
1229                         mdio_write(ioaddr, pos, p->regs[4 - pos] & 0xffff);
1230                 rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 1); //w 4 11 11 1
1231                 rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0); //w 4 11 11 0
1232         }
1233         mdio_write(ioaddr, 0x1f, 0x0000); //w 31 2 0 0
1234 }
1235
1236 static void rtl8169sb_hw_phy_config(void __iomem *ioaddr)
1237 {
1238         struct phy_reg phy_reg_init[] = {
1239                 { 0x1f, 0x0002 },
1240                 { 0x01, 0x90d0 },
1241                 { 0x1f, 0x0000 }
1242         };
1243
1244         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1245 }
1246 static void rtl8168b_hw_phy_config(void __iomem *ioaddr)
1247 {
1248         struct phy_reg phy_reg_init[] = {
1249                 { 0x1f, 0x0000 },
1250                 { 0x10, 0xf41b },
1251                 { 0x1f, 0x0000 }
1252         };
1253
1254         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1255 }
1256
1257 static void rtl8168cp_hw_phy_config(void __iomem *ioaddr)
1258 {
1259         struct phy_reg phy_reg_init[] = {
1260                 { 0x1f, 0x0000 },
1261                 { 0x1d, 0x0f00 },
1262                 { 0x1f, 0x0002 },
1263                 { 0x0c, 0x1ec8 },
1264                 { 0x1f, 0x0000 }
1265         };
1266
1267         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1268 }
1269
1270 static void rtl8168c_hw_phy_config(void __iomem *ioaddr)
1271 {
1272         struct phy_reg phy_reg_init[] = {
1273                 { 0x1f, 0x0001 },
1274                 { 0x12, 0x2300 },
1275                 { 0x1f, 0x0002 },
1276                 { 0x00, 0x88d4 },
1277                 { 0x01, 0x82b1 },
1278                 { 0x03, 0x7002 },
1279                 { 0x08, 0x9e30 },
1280                 { 0x09, 0x01f0 },
1281                 { 0x0a, 0x5500 },
1282                 { 0x0c, 0x00c8 },
1283                 { 0x1f, 0x0003 },
1284                 { 0x12, 0xc096 },
1285                 { 0x16, 0x000a },
1286                 { 0x1f, 0x0000 }
1287         };
1288
1289         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1290 }
1291
1292 static void rtl8168cx_hw_phy_config(void __iomem *ioaddr)
1293 {
1294         struct phy_reg phy_reg_init[] = {
1295                 { 0x1f, 0x0000 },
1296                 { 0x12, 0x2300 },
1297                 { 0x1f, 0x0003 },
1298                 { 0x16, 0x0f0a },
1299                 { 0x1f, 0x0000 },
1300                 { 0x1f, 0x0002 },
1301                 { 0x0c, 0x7eb8 },
1302                 { 0x1f, 0x0000 }
1303         };
1304
1305         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1306 }
1307
1308 static void rtl_hw_phy_config(struct net_device *dev)
1309 {
1310         struct rtl8169_private *tp = netdev_priv(dev);
1311         void __iomem *ioaddr = tp->mmio_addr;
1312
1313         rtl8169_print_mac_version(tp);
1314
1315         switch (tp->mac_version) {
1316         case RTL_GIGA_MAC_VER_01:
1317                 break;
1318         case RTL_GIGA_MAC_VER_02:
1319         case RTL_GIGA_MAC_VER_03:
1320                 rtl8169s_hw_phy_config(ioaddr);
1321                 break;
1322         case RTL_GIGA_MAC_VER_04:
1323                 rtl8169sb_hw_phy_config(ioaddr);
1324                 break;
1325         case RTL_GIGA_MAC_VER_11:
1326         case RTL_GIGA_MAC_VER_12:
1327         case RTL_GIGA_MAC_VER_17:
1328                 rtl8168b_hw_phy_config(ioaddr);
1329                 break;
1330         case RTL_GIGA_MAC_VER_18:
1331                 rtl8168cp_hw_phy_config(ioaddr);
1332                 break;
1333         case RTL_GIGA_MAC_VER_19:
1334                 rtl8168c_hw_phy_config(ioaddr);
1335                 break;
1336         case RTL_GIGA_MAC_VER_20:
1337                 rtl8168cx_hw_phy_config(ioaddr);
1338                 break;
1339         default:
1340                 break;
1341         }
1342 }
1343
1344 static void rtl8169_phy_timer(unsigned long __opaque)
1345 {
1346         struct net_device *dev = (struct net_device *)__opaque;
1347         struct rtl8169_private *tp = netdev_priv(dev);
1348         struct timer_list *timer = &tp->timer;
1349         void __iomem *ioaddr = tp->mmio_addr;
1350         unsigned long timeout = RTL8169_PHY_TIMEOUT;
1351
1352         assert(tp->mac_version > RTL_GIGA_MAC_VER_01);
1353
1354         if (!(tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL))
1355                 return;
1356
1357         spin_lock_irq(&tp->lock);
1358
1359         if (tp->phy_reset_pending(ioaddr)) {
1360                 /*
1361                  * A busy loop could burn quite a few cycles on nowadays CPU.
1362                  * Let's delay the execution of the timer for a few ticks.
1363                  */
1364                 timeout = HZ/10;
1365                 goto out_mod_timer;
1366         }
1367
1368         if (tp->link_ok(ioaddr))
1369                 goto out_unlock;
1370
1371         if (netif_msg_link(tp))
1372                 printk(KERN_WARNING "%s: PHY reset until link up\n", dev->name);
1373
1374         tp->phy_reset_enable(ioaddr);
1375
1376 out_mod_timer:
1377         mod_timer(timer, jiffies + timeout);
1378 out_unlock:
1379         spin_unlock_irq(&tp->lock);
1380 }
1381
1382 static inline void rtl8169_delete_timer(struct net_device *dev)
1383 {
1384         struct rtl8169_private *tp = netdev_priv(dev);
1385         struct timer_list *timer = &tp->timer;
1386
1387         if (tp->mac_version <= RTL_GIGA_MAC_VER_01)
1388                 return;
1389
1390         del_timer_sync(timer);
1391 }
1392
1393 static inline void rtl8169_request_timer(struct net_device *dev)
1394 {
1395         struct rtl8169_private *tp = netdev_priv(dev);
1396         struct timer_list *timer = &tp->timer;
1397
1398         if (tp->mac_version <= RTL_GIGA_MAC_VER_01)
1399                 return;
1400
1401         mod_timer(timer, jiffies + RTL8169_PHY_TIMEOUT);
1402 }
1403
1404 #ifdef CONFIG_NET_POLL_CONTROLLER
1405 /*
1406  * Polling 'interrupt' - used by things like netconsole to send skbs
1407  * without having to re-enable interrupts. It's not called while
1408  * the interrupt routine is executing.
1409  */
1410 static void rtl8169_netpoll(struct net_device *dev)
1411 {
1412         struct rtl8169_private *tp = netdev_priv(dev);
1413         struct pci_dev *pdev = tp->pci_dev;
1414
1415         disable_irq(pdev->irq);
1416         rtl8169_interrupt(pdev->irq, dev);
1417         enable_irq(pdev->irq);
1418 }
1419 #endif
1420
1421 static void rtl8169_release_board(struct pci_dev *pdev, struct net_device *dev,
1422                                   void __iomem *ioaddr)
1423 {
1424         iounmap(ioaddr);
1425         pci_release_regions(pdev);
1426         pci_disable_device(pdev);
1427         free_netdev(dev);
1428 }
1429
1430 static void rtl8169_phy_reset(struct net_device *dev,
1431                               struct rtl8169_private *tp)
1432 {
1433         void __iomem *ioaddr = tp->mmio_addr;
1434         unsigned int i;
1435
1436         tp->phy_reset_enable(ioaddr);
1437         for (i = 0; i < 100; i++) {
1438                 if (!tp->phy_reset_pending(ioaddr))
1439                         return;
1440                 msleep(1);
1441         }
1442         if (netif_msg_link(tp))
1443                 printk(KERN_ERR "%s: PHY reset failed.\n", dev->name);
1444 }
1445
1446 static void rtl8169_init_phy(struct net_device *dev, struct rtl8169_private *tp)
1447 {
1448         void __iomem *ioaddr = tp->mmio_addr;
1449
1450         rtl_hw_phy_config(dev);
1451
1452         dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
1453         RTL_W8(0x82, 0x01);
1454
1455         pci_write_config_byte(tp->pci_dev, PCI_LATENCY_TIMER, 0x40);
1456
1457         if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
1458                 pci_write_config_byte(tp->pci_dev, PCI_CACHE_LINE_SIZE, 0x08);
1459
1460         if (tp->mac_version == RTL_GIGA_MAC_VER_02) {
1461                 dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
1462                 RTL_W8(0x82, 0x01);
1463                 dprintk("Set PHY Reg 0x0bh = 0x00h\n");
1464                 mdio_write(ioaddr, 0x0b, 0x0000); //w 0x0b 15 0 0
1465         }
1466
1467         rtl8169_phy_reset(dev, tp);
1468
1469         /*
1470          * rtl8169_set_speed_xmii takes good care of the Fast Ethernet
1471          * only 8101. Don't panic.
1472          */
1473         rtl8169_set_speed(dev, AUTONEG_ENABLE, SPEED_1000, DUPLEX_FULL);
1474
1475         if ((RTL_R8(PHYstatus) & TBI_Enable) && netif_msg_link(tp))
1476                 printk(KERN_INFO PFX "%s: TBI auto-negotiating\n", dev->name);
1477 }
1478
1479 static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr)
1480 {
1481         void __iomem *ioaddr = tp->mmio_addr;
1482         u32 high;
1483         u32 low;
1484
1485         low  = addr[0] | (addr[1] << 8) | (addr[2] << 16) | (addr[3] << 24);
1486         high = addr[4] | (addr[5] << 8);
1487
1488         spin_lock_irq(&tp->lock);
1489
1490         RTL_W8(Cfg9346, Cfg9346_Unlock);
1491         RTL_W32(MAC0, low);
1492         RTL_W32(MAC4, high);
1493         RTL_W8(Cfg9346, Cfg9346_Lock);
1494
1495         spin_unlock_irq(&tp->lock);
1496 }
1497
1498 static int rtl_set_mac_address(struct net_device *dev, void *p)
1499 {
1500         struct rtl8169_private *tp = netdev_priv(dev);
1501         struct sockaddr *addr = p;
1502
1503         if (!is_valid_ether_addr(addr->sa_data))
1504                 return -EADDRNOTAVAIL;
1505
1506         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1507
1508         rtl_rar_set(tp, dev->dev_addr);
1509
1510         return 0;
1511 }
1512
1513 static int rtl8169_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1514 {
1515         struct rtl8169_private *tp = netdev_priv(dev);
1516         struct mii_ioctl_data *data = if_mii(ifr);
1517
1518         if (!netif_running(dev))
1519                 return -ENODEV;
1520
1521         switch (cmd) {
1522         case SIOCGMIIPHY:
1523                 data->phy_id = 32; /* Internal PHY */
1524                 return 0;
1525
1526         case SIOCGMIIREG:
1527                 data->val_out = mdio_read(tp->mmio_addr, data->reg_num & 0x1f);
1528                 return 0;
1529
1530         case SIOCSMIIREG:
1531                 if (!capable(CAP_NET_ADMIN))
1532                         return -EPERM;
1533                 mdio_write(tp->mmio_addr, data->reg_num & 0x1f, data->val_in);
1534                 return 0;
1535         }
1536         return -EOPNOTSUPP;
1537 }
1538
1539 static const struct rtl_cfg_info {
1540         void (*hw_start)(struct net_device *);
1541         unsigned int region;
1542         unsigned int align;
1543         u16 intr_event;
1544         u16 napi_event;
1545         unsigned msi;
1546 } rtl_cfg_infos [] = {
1547         [RTL_CFG_0] = {
1548                 .hw_start       = rtl_hw_start_8169,
1549                 .region         = 1,
1550                 .align          = 0,
1551                 .intr_event     = SYSErr | LinkChg | RxOverflow |
1552                                   RxFIFOOver | TxErr | TxOK | RxOK | RxErr,
1553                 .napi_event     = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow,
1554                 .msi            = 0
1555         },
1556         [RTL_CFG_1] = {
1557                 .hw_start       = rtl_hw_start_8168,
1558                 .region         = 2,
1559                 .align          = 8,
1560                 .intr_event     = SYSErr | LinkChg | RxOverflow |
1561                                   TxErr | TxOK | RxOK | RxErr,
1562                 .napi_event     = TxErr | TxOK | RxOK | RxOverflow,
1563                 .msi            = RTL_FEATURE_MSI
1564         },
1565         [RTL_CFG_2] = {
1566                 .hw_start       = rtl_hw_start_8101,
1567                 .region         = 2,
1568                 .align          = 8,
1569                 .intr_event     = SYSErr | LinkChg | RxOverflow | PCSTimeout |
1570                                   RxFIFOOver | TxErr | TxOK | RxOK | RxErr,
1571                 .napi_event     = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow,
1572                 .msi            = RTL_FEATURE_MSI
1573         }
1574 };
1575
1576 /* Cfg9346_Unlock assumed. */
1577 static unsigned rtl_try_msi(struct pci_dev *pdev, void __iomem *ioaddr,
1578                             const struct rtl_cfg_info *cfg)
1579 {
1580         unsigned msi = 0;
1581         u8 cfg2;
1582
1583         cfg2 = RTL_R8(Config2) & ~MSIEnable;
1584         if (cfg->msi) {
1585                 if (pci_enable_msi(pdev)) {
1586                         dev_info(&pdev->dev, "no MSI. Back to INTx.\n");
1587                 } else {
1588                         cfg2 |= MSIEnable;
1589                         msi = RTL_FEATURE_MSI;
1590                 }
1591         }
1592         RTL_W8(Config2, cfg2);
1593         return msi;
1594 }
1595
1596 static void rtl_disable_msi(struct pci_dev *pdev, struct rtl8169_private *tp)
1597 {
1598         if (tp->features & RTL_FEATURE_MSI) {
1599                 pci_disable_msi(pdev);
1600                 tp->features &= ~RTL_FEATURE_MSI;
1601         }
1602 }
1603
1604 static int __devinit
1605 rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1606 {
1607         const struct rtl_cfg_info *cfg = rtl_cfg_infos + ent->driver_data;
1608         const unsigned int region = cfg->region;
1609         struct rtl8169_private *tp;
1610         struct net_device *dev;
1611         void __iomem *ioaddr;
1612         unsigned int i;
1613         int rc;
1614
1615         if (netif_msg_drv(&debug)) {
1616                 printk(KERN_INFO "%s Gigabit Ethernet driver %s loaded\n",
1617                        MODULENAME, RTL8169_VERSION);
1618         }
1619
1620         dev = alloc_etherdev(sizeof (*tp));
1621         if (!dev) {
1622                 if (netif_msg_drv(&debug))
1623                         dev_err(&pdev->dev, "unable to alloc new ethernet\n");
1624                 rc = -ENOMEM;
1625                 goto out;
1626         }
1627
1628         SET_NETDEV_DEV(dev, &pdev->dev);
1629         tp = netdev_priv(dev);
1630         tp->dev = dev;
1631         tp->msg_enable = netif_msg_init(debug.msg_enable, R8169_MSG_DEFAULT);
1632
1633         /* enable device (incl. PCI PM wakeup and hotplug setup) */
1634         rc = pci_enable_device(pdev);
1635         if (rc < 0) {
1636                 if (netif_msg_probe(tp))
1637                         dev_err(&pdev->dev, "enable failure\n");
1638                 goto err_out_free_dev_1;
1639         }
1640
1641         rc = pci_set_mwi(pdev);
1642         if (rc < 0)
1643                 goto err_out_disable_2;
1644
1645         /* make sure PCI base addr 1 is MMIO */
1646         if (!(pci_resource_flags(pdev, region) & IORESOURCE_MEM)) {
1647                 if (netif_msg_probe(tp)) {
1648                         dev_err(&pdev->dev,
1649                                 "region #%d not an MMIO resource, aborting\n",
1650                                 region);
1651                 }
1652                 rc = -ENODEV;
1653                 goto err_out_mwi_3;
1654         }
1655
1656         /* check for weird/broken PCI region reporting */
1657         if (pci_resource_len(pdev, region) < R8169_REGS_SIZE) {
1658                 if (netif_msg_probe(tp)) {
1659                         dev_err(&pdev->dev,
1660                                 "Invalid PCI region size(s), aborting\n");
1661                 }
1662                 rc = -ENODEV;
1663                 goto err_out_mwi_3;
1664         }
1665
1666         rc = pci_request_regions(pdev, MODULENAME);
1667         if (rc < 0) {
1668                 if (netif_msg_probe(tp))
1669                         dev_err(&pdev->dev, "could not request regions.\n");
1670                 goto err_out_mwi_3;
1671         }
1672
1673         tp->cp_cmd = PCIMulRW | RxChkSum;
1674
1675         if ((sizeof(dma_addr_t) > 4) &&
1676             !pci_set_dma_mask(pdev, DMA_64BIT_MASK) && use_dac) {
1677                 tp->cp_cmd |= PCIDAC;
1678                 dev->features |= NETIF_F_HIGHDMA;
1679         } else {
1680                 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1681                 if (rc < 0) {
1682                         if (netif_msg_probe(tp)) {
1683                                 dev_err(&pdev->dev,
1684                                         "DMA configuration failed.\n");
1685                         }
1686                         goto err_out_free_res_4;
1687                 }
1688         }
1689
1690         pci_set_master(pdev);
1691
1692         /* ioremap MMIO region */
1693         ioaddr = ioremap(pci_resource_start(pdev, region), R8169_REGS_SIZE);
1694         if (!ioaddr) {
1695                 if (netif_msg_probe(tp))
1696                         dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
1697                 rc = -EIO;
1698                 goto err_out_free_res_4;
1699         }
1700
1701         /* Unneeded ? Don't mess with Mrs. Murphy. */
1702         rtl8169_irq_mask_and_ack(ioaddr);
1703
1704         /* Soft reset the chip. */
1705         RTL_W8(ChipCmd, CmdReset);
1706
1707         /* Check that the chip has finished the reset. */
1708         for (i = 0; i < 100; i++) {
1709                 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
1710                         break;
1711                 msleep_interruptible(1);
1712         }
1713
1714         /* Identify chip attached to board */
1715         rtl8169_get_mac_version(tp, ioaddr);
1716
1717         rtl8169_print_mac_version(tp);
1718
1719         for (i = ARRAY_SIZE(rtl_chip_info) - 1; i >= 0; i--) {
1720                 if (tp->mac_version == rtl_chip_info[i].mac_version)
1721                         break;
1722         }
1723         if (i < 0) {
1724                 /* Unknown chip: assume array element #0, original RTL-8169 */
1725                 if (netif_msg_probe(tp)) {
1726                         dev_printk(KERN_DEBUG, &pdev->dev,
1727                                 "unknown chip version, assuming %s\n",
1728                                 rtl_chip_info[0].name);
1729                 }
1730                 i++;
1731         }
1732         tp->chipset = i;
1733
1734         RTL_W8(Cfg9346, Cfg9346_Unlock);
1735         RTL_W8(Config1, RTL_R8(Config1) | PMEnable);
1736         RTL_W8(Config5, RTL_R8(Config5) & PMEStatus);
1737         tp->features |= rtl_try_msi(pdev, ioaddr, cfg);
1738         RTL_W8(Cfg9346, Cfg9346_Lock);
1739
1740         if (RTL_R8(PHYstatus) & TBI_Enable) {
1741                 tp->set_speed = rtl8169_set_speed_tbi;
1742                 tp->get_settings = rtl8169_gset_tbi;
1743                 tp->phy_reset_enable = rtl8169_tbi_reset_enable;
1744                 tp->phy_reset_pending = rtl8169_tbi_reset_pending;
1745                 tp->link_ok = rtl8169_tbi_link_ok;
1746
1747                 tp->phy_1000_ctrl_reg = ADVERTISE_1000FULL; /* Implied by TBI */
1748         } else {
1749                 tp->set_speed = rtl8169_set_speed_xmii;
1750                 tp->get_settings = rtl8169_gset_xmii;
1751                 tp->phy_reset_enable = rtl8169_xmii_reset_enable;
1752                 tp->phy_reset_pending = rtl8169_xmii_reset_pending;
1753                 tp->link_ok = rtl8169_xmii_link_ok;
1754
1755                 dev->do_ioctl = rtl8169_ioctl;
1756         }
1757
1758         /* Get MAC address.  FIXME: read EEPROM */
1759         for (i = 0; i < MAC_ADDR_LEN; i++)
1760                 dev->dev_addr[i] = RTL_R8(MAC0 + i);
1761         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1762
1763         dev->open = rtl8169_open;
1764         dev->hard_start_xmit = rtl8169_start_xmit;
1765         dev->get_stats = rtl8169_get_stats;
1766         SET_ETHTOOL_OPS(dev, &rtl8169_ethtool_ops);
1767         dev->stop = rtl8169_close;
1768         dev->tx_timeout = rtl8169_tx_timeout;
1769         dev->set_multicast_list = rtl_set_rx_mode;
1770         dev->watchdog_timeo = RTL8169_TX_TIMEOUT;
1771         dev->irq = pdev->irq;
1772         dev->base_addr = (unsigned long) ioaddr;
1773         dev->change_mtu = rtl8169_change_mtu;
1774         dev->set_mac_address = rtl_set_mac_address;
1775
1776 #ifdef CONFIG_R8169_NAPI
1777         netif_napi_add(dev, &tp->napi, rtl8169_poll, R8169_NAPI_WEIGHT);
1778 #endif
1779
1780 #ifdef CONFIG_R8169_VLAN
1781         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1782         dev->vlan_rx_register = rtl8169_vlan_rx_register;
1783 #endif
1784
1785 #ifdef CONFIG_NET_POLL_CONTROLLER
1786         dev->poll_controller = rtl8169_netpoll;
1787 #endif
1788
1789         tp->intr_mask = 0xffff;
1790         tp->pci_dev = pdev;
1791         tp->mmio_addr = ioaddr;
1792         tp->align = cfg->align;
1793         tp->hw_start = cfg->hw_start;
1794         tp->intr_event = cfg->intr_event;
1795         tp->napi_event = cfg->napi_event;
1796
1797         init_timer(&tp->timer);
1798         tp->timer.data = (unsigned long) dev;
1799         tp->timer.function = rtl8169_phy_timer;
1800
1801         spin_lock_init(&tp->lock);
1802
1803         rc = register_netdev(dev);
1804         if (rc < 0)
1805                 goto err_out_msi_5;
1806
1807         pci_set_drvdata(pdev, dev);
1808
1809         if (netif_msg_probe(tp)) {
1810                 u32 xid = RTL_R32(TxConfig) & 0x7cf0f8ff;
1811
1812                 printk(KERN_INFO "%s: %s at 0x%lx, "
1813                        "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
1814                        "XID %08x IRQ %d\n",
1815                        dev->name,
1816                        rtl_chip_info[tp->chipset].name,
1817                        dev->base_addr,
1818                        dev->dev_addr[0], dev->dev_addr[1],
1819                        dev->dev_addr[2], dev->dev_addr[3],
1820                        dev->dev_addr[4], dev->dev_addr[5], xid, dev->irq);
1821         }
1822
1823         rtl8169_init_phy(dev, tp);
1824
1825 out:
1826         return rc;
1827
1828 err_out_msi_5:
1829         rtl_disable_msi(pdev, tp);
1830         iounmap(ioaddr);
1831 err_out_free_res_4:
1832         pci_release_regions(pdev);
1833 err_out_mwi_3:
1834         pci_clear_mwi(pdev);
1835 err_out_disable_2:
1836         pci_disable_device(pdev);
1837 err_out_free_dev_1:
1838         free_netdev(dev);
1839         goto out;
1840 }
1841
1842 static void __devexit rtl8169_remove_one(struct pci_dev *pdev)
1843 {
1844         struct net_device *dev = pci_get_drvdata(pdev);
1845         struct rtl8169_private *tp = netdev_priv(dev);
1846
1847         flush_scheduled_work();
1848
1849         unregister_netdev(dev);
1850         rtl_disable_msi(pdev, tp);
1851         rtl8169_release_board(pdev, dev, tp->mmio_addr);
1852         pci_set_drvdata(pdev, NULL);
1853 }
1854
1855 static void rtl8169_set_rxbufsize(struct rtl8169_private *tp,
1856                                   struct net_device *dev)
1857 {
1858         unsigned int mtu = dev->mtu;
1859
1860         tp->rx_buf_sz = (mtu > RX_BUF_SIZE) ? mtu + ETH_HLEN + 8 : RX_BUF_SIZE;
1861 }
1862
1863 static int rtl8169_open(struct net_device *dev)
1864 {
1865         struct rtl8169_private *tp = netdev_priv(dev);
1866         struct pci_dev *pdev = tp->pci_dev;
1867         int retval = -ENOMEM;
1868
1869
1870         rtl8169_set_rxbufsize(tp, dev);
1871
1872         /*
1873          * Rx and Tx desscriptors needs 256 bytes alignment.
1874          * pci_alloc_consistent provides more.
1875          */
1876         tp->TxDescArray = pci_alloc_consistent(pdev, R8169_TX_RING_BYTES,
1877                                                &tp->TxPhyAddr);
1878         if (!tp->TxDescArray)
1879                 goto out;
1880
1881         tp->RxDescArray = pci_alloc_consistent(pdev, R8169_RX_RING_BYTES,
1882                                                &tp->RxPhyAddr);
1883         if (!tp->RxDescArray)
1884                 goto err_free_tx_0;
1885
1886         retval = rtl8169_init_ring(dev);
1887         if (retval < 0)
1888                 goto err_free_rx_1;
1889
1890         INIT_DELAYED_WORK(&tp->task, NULL);
1891
1892         smp_mb();
1893
1894         retval = request_irq(dev->irq, rtl8169_interrupt,
1895                              (tp->features & RTL_FEATURE_MSI) ? 0 : IRQF_SHARED,
1896                              dev->name, dev);
1897         if (retval < 0)
1898                 goto err_release_ring_2;
1899
1900 #ifdef CONFIG_R8169_NAPI
1901         napi_enable(&tp->napi);
1902 #endif
1903
1904         rtl_hw_start(dev);
1905
1906         rtl8169_request_timer(dev);
1907
1908         rtl8169_check_link_status(dev, tp, tp->mmio_addr);
1909 out:
1910         return retval;
1911
1912 err_release_ring_2:
1913         rtl8169_rx_clear(tp);
1914 err_free_rx_1:
1915         pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
1916                             tp->RxPhyAddr);
1917 err_free_tx_0:
1918         pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
1919                             tp->TxPhyAddr);
1920         goto out;
1921 }
1922
1923 static void rtl8169_hw_reset(void __iomem *ioaddr)
1924 {
1925         /* Disable interrupts */
1926         rtl8169_irq_mask_and_ack(ioaddr);
1927
1928         /* Reset the chipset */
1929         RTL_W8(ChipCmd, CmdReset);
1930
1931         /* PCI commit */
1932         RTL_R8(ChipCmd);
1933 }
1934
1935 static void rtl_set_rx_tx_config_registers(struct rtl8169_private *tp)
1936 {
1937         void __iomem *ioaddr = tp->mmio_addr;
1938         u32 cfg = rtl8169_rx_config;
1939
1940         cfg |= (RTL_R32(RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1941         RTL_W32(RxConfig, cfg);
1942
1943         /* Set DMA burst size and Interframe Gap Time */
1944         RTL_W32(TxConfig, (TX_DMA_BURST << TxDMAShift) |
1945                 (InterFrameGap << TxInterFrameGapShift));
1946 }
1947
1948 static void rtl_hw_start(struct net_device *dev)
1949 {
1950         struct rtl8169_private *tp = netdev_priv(dev);
1951         void __iomem *ioaddr = tp->mmio_addr;
1952         unsigned int i;
1953
1954         /* Soft reset the chip. */
1955         RTL_W8(ChipCmd, CmdReset);
1956
1957         /* Check that the chip has finished the reset. */
1958         for (i = 0; i < 100; i++) {
1959                 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
1960                         break;
1961                 msleep_interruptible(1);
1962         }
1963
1964         tp->hw_start(dev);
1965
1966         netif_start_queue(dev);
1967 }
1968
1969
1970 static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp,
1971                                          void __iomem *ioaddr)
1972 {
1973         /*
1974          * Magic spell: some iop3xx ARM board needs the TxDescAddrHigh
1975          * register to be written before TxDescAddrLow to work.
1976          * Switching from MMIO to I/O access fixes the issue as well.
1977          */
1978         RTL_W32(TxDescStartAddrHigh, ((u64) tp->TxPhyAddr) >> 32);
1979         RTL_W32(TxDescStartAddrLow, ((u64) tp->TxPhyAddr) & DMA_32BIT_MASK);
1980         RTL_W32(RxDescAddrHigh, ((u64) tp->RxPhyAddr) >> 32);
1981         RTL_W32(RxDescAddrLow, ((u64) tp->RxPhyAddr) & DMA_32BIT_MASK);
1982 }
1983
1984 static u16 rtl_rw_cpluscmd(void __iomem *ioaddr)
1985 {
1986         u16 cmd;
1987
1988         cmd = RTL_R16(CPlusCmd);
1989         RTL_W16(CPlusCmd, cmd);
1990         return cmd;
1991 }
1992
1993 static void rtl_set_rx_max_size(void __iomem *ioaddr)
1994 {
1995         /* Low hurts. Let's disable the filtering. */
1996         RTL_W16(RxMaxSize, 16383);
1997 }
1998
1999 static void rtl8169_set_magic_reg(void __iomem *ioaddr, unsigned mac_version)
2000 {
2001         struct {
2002                 u32 mac_version;
2003                 u32 clk;
2004                 u32 val;
2005         } cfg2_info [] = {
2006                 { RTL_GIGA_MAC_VER_05, PCI_Clock_33MHz, 0x000fff00 }, // 8110SCd
2007                 { RTL_GIGA_MAC_VER_05, PCI_Clock_66MHz, 0x000fffff },
2008                 { RTL_GIGA_MAC_VER_06, PCI_Clock_33MHz, 0x00ffff00 }, // 8110SCe
2009                 { RTL_GIGA_MAC_VER_06, PCI_Clock_66MHz, 0x00ffffff }
2010         }, *p = cfg2_info;
2011         unsigned int i;
2012         u32 clk;
2013
2014         clk = RTL_R8(Config2) & PCI_Clock_66MHz;
2015         for (i = 0; i < ARRAY_SIZE(cfg2_info); i++) {
2016                 if ((p->mac_version == mac_version) && (p->clk == clk)) {
2017                         RTL_W32(0x7c, p->val);
2018                         break;
2019                 }
2020         }
2021 }
2022
2023 static void rtl_hw_start_8169(struct net_device *dev)
2024 {
2025         struct rtl8169_private *tp = netdev_priv(dev);
2026         void __iomem *ioaddr = tp->mmio_addr;
2027         struct pci_dev *pdev = tp->pci_dev;
2028
2029         if (tp->mac_version == RTL_GIGA_MAC_VER_05) {
2030                 RTL_W16(CPlusCmd, RTL_R16(CPlusCmd) | PCIMulRW);
2031                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 0x08);
2032         }
2033
2034         RTL_W8(Cfg9346, Cfg9346_Unlock);
2035         if ((tp->mac_version == RTL_GIGA_MAC_VER_01) ||
2036             (tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2037             (tp->mac_version == RTL_GIGA_MAC_VER_03) ||
2038             (tp->mac_version == RTL_GIGA_MAC_VER_04))
2039                 RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2040
2041         RTL_W8(EarlyTxThres, EarlyTxThld);
2042
2043         rtl_set_rx_max_size(ioaddr);
2044
2045         if ((tp->mac_version == RTL_GIGA_MAC_VER_01) ||
2046             (tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2047             (tp->mac_version == RTL_GIGA_MAC_VER_03) ||
2048             (tp->mac_version == RTL_GIGA_MAC_VER_04))
2049                 rtl_set_rx_tx_config_registers(tp);
2050
2051         tp->cp_cmd |= rtl_rw_cpluscmd(ioaddr) | PCIMulRW;
2052
2053         if ((tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2054             (tp->mac_version == RTL_GIGA_MAC_VER_03)) {
2055                 dprintk("Set MAC Reg C+CR Offset 0xE0. "
2056                         "Bit-3 and bit-14 MUST be 1\n");
2057                 tp->cp_cmd |= (1 << 14);
2058         }
2059
2060         RTL_W16(CPlusCmd, tp->cp_cmd);
2061
2062         rtl8169_set_magic_reg(ioaddr, tp->mac_version);
2063
2064         /*
2065          * Undocumented corner. Supposedly:
2066          * (TxTimer << 12) | (TxPackets << 8) | (RxTimer << 4) | RxPackets
2067          */
2068         RTL_W16(IntrMitigate, 0x0000);
2069
2070         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2071
2072         if ((tp->mac_version != RTL_GIGA_MAC_VER_01) &&
2073             (tp->mac_version != RTL_GIGA_MAC_VER_02) &&
2074             (tp->mac_version != RTL_GIGA_MAC_VER_03) &&
2075             (tp->mac_version != RTL_GIGA_MAC_VER_04)) {
2076                 RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2077                 rtl_set_rx_tx_config_registers(tp);
2078         }
2079
2080         RTL_W8(Cfg9346, Cfg9346_Lock);
2081
2082         /* Initially a 10 us delay. Turned it into a PCI commit. - FR */
2083         RTL_R8(IntrMask);
2084
2085         RTL_W32(RxMissed, 0);
2086
2087         rtl_set_rx_mode(dev);
2088
2089         /* no early-rx interrupts */
2090         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
2091
2092         /* Enable all known interrupts by setting the interrupt mask. */
2093         RTL_W16(IntrMask, tp->intr_event);
2094 }
2095
2096 static void rtl_hw_start_8168(struct net_device *dev)
2097 {
2098         struct rtl8169_private *tp = netdev_priv(dev);
2099         void __iomem *ioaddr = tp->mmio_addr;
2100         struct pci_dev *pdev = tp->pci_dev;
2101         u8 ctl;
2102
2103         RTL_W8(Cfg9346, Cfg9346_Unlock);
2104
2105         RTL_W8(EarlyTxThres, EarlyTxThld);
2106
2107         rtl_set_rx_max_size(ioaddr);
2108
2109         rtl_set_rx_tx_config_registers(tp);
2110
2111         tp->cp_cmd |= RTL_R16(CPlusCmd) | PktCntrDisable | INTT_1;
2112
2113         RTL_W16(CPlusCmd, tp->cp_cmd);
2114
2115         /* Tx performance tweak. */
2116         pci_read_config_byte(pdev, 0x69, &ctl);
2117         ctl = (ctl & ~0x70) | 0x50;
2118         pci_write_config_byte(pdev, 0x69, ctl);
2119
2120         RTL_W16(IntrMitigate, 0x5151);
2121
2122         /* Work around for RxFIFO overflow. */
2123         if (tp->mac_version == RTL_GIGA_MAC_VER_11) {
2124                 tp->intr_event |= RxFIFOOver | PCSTimeout;
2125                 tp->intr_event &= ~RxOverflow;
2126         }
2127
2128         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2129
2130         RTL_W8(Cfg9346, Cfg9346_Lock);
2131
2132         RTL_R8(IntrMask);
2133
2134         RTL_W32(RxMissed, 0);
2135
2136         rtl_set_rx_mode(dev);
2137
2138         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2139
2140         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
2141
2142         RTL_W16(IntrMask, tp->intr_event);
2143 }
2144
2145 static void rtl_hw_start_8101(struct net_device *dev)
2146 {
2147         struct rtl8169_private *tp = netdev_priv(dev);
2148         void __iomem *ioaddr = tp->mmio_addr;
2149         struct pci_dev *pdev = tp->pci_dev;
2150
2151         if ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
2152             (tp->mac_version == RTL_GIGA_MAC_VER_16)) {
2153                 pci_write_config_word(pdev, 0x68, 0x00);
2154                 pci_write_config_word(pdev, 0x69, 0x08);
2155         }
2156
2157         RTL_W8(Cfg9346, Cfg9346_Unlock);
2158
2159         RTL_W8(EarlyTxThres, EarlyTxThld);
2160
2161         rtl_set_rx_max_size(ioaddr);
2162
2163         tp->cp_cmd |= rtl_rw_cpluscmd(ioaddr) | PCIMulRW;
2164
2165         RTL_W16(CPlusCmd, tp->cp_cmd);
2166
2167         RTL_W16(IntrMitigate, 0x0000);
2168
2169         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2170
2171         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2172         rtl_set_rx_tx_config_registers(tp);
2173
2174         RTL_W8(Cfg9346, Cfg9346_Lock);
2175
2176         RTL_R8(IntrMask);
2177
2178         RTL_W32(RxMissed, 0);
2179
2180         rtl_set_rx_mode(dev);
2181
2182         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2183
2184         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xf000);
2185
2186         RTL_W16(IntrMask, tp->intr_event);
2187 }
2188
2189 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
2190 {
2191         struct rtl8169_private *tp = netdev_priv(dev);
2192         int ret = 0;
2193
2194         if (new_mtu < ETH_ZLEN || new_mtu > SafeMtu)
2195                 return -EINVAL;
2196
2197         dev->mtu = new_mtu;
2198
2199         if (!netif_running(dev))
2200                 goto out;
2201
2202         rtl8169_down(dev);
2203
2204         rtl8169_set_rxbufsize(tp, dev);
2205
2206         ret = rtl8169_init_ring(dev);
2207         if (ret < 0)
2208                 goto out;
2209
2210 #ifdef CONFIG_R8169_NAPI
2211         napi_enable(&tp->napi);
2212 #endif
2213
2214         rtl_hw_start(dev);
2215
2216         rtl8169_request_timer(dev);
2217
2218 out:
2219         return ret;
2220 }
2221
2222 static inline void rtl8169_make_unusable_by_asic(struct RxDesc *desc)
2223 {
2224         desc->addr = 0x0badbadbadbadbadull;
2225         desc->opts1 &= ~cpu_to_le32(DescOwn | RsvdMask);
2226 }
2227
2228 static void rtl8169_free_rx_skb(struct rtl8169_private *tp,
2229                                 struct sk_buff **sk_buff, struct RxDesc *desc)
2230 {
2231         struct pci_dev *pdev = tp->pci_dev;
2232
2233         pci_unmap_single(pdev, le64_to_cpu(desc->addr), tp->rx_buf_sz,
2234                          PCI_DMA_FROMDEVICE);
2235         dev_kfree_skb(*sk_buff);
2236         *sk_buff = NULL;
2237         rtl8169_make_unusable_by_asic(desc);
2238 }
2239
2240 static inline void rtl8169_mark_to_asic(struct RxDesc *desc, u32 rx_buf_sz)
2241 {
2242         u32 eor = le32_to_cpu(desc->opts1) & RingEnd;
2243
2244         desc->opts1 = cpu_to_le32(DescOwn | eor | rx_buf_sz);
2245 }
2246
2247 static inline void rtl8169_map_to_asic(struct RxDesc *desc, dma_addr_t mapping,
2248                                        u32 rx_buf_sz)
2249 {
2250         desc->addr = cpu_to_le64(mapping);
2251         wmb();
2252         rtl8169_mark_to_asic(desc, rx_buf_sz);
2253 }
2254
2255 static struct sk_buff *rtl8169_alloc_rx_skb(struct pci_dev *pdev,
2256                                             struct net_device *dev,
2257                                             struct RxDesc *desc, int rx_buf_sz,
2258                                             unsigned int align)
2259 {
2260         struct sk_buff *skb;
2261         dma_addr_t mapping;
2262         unsigned int pad;
2263
2264         pad = align ? align : NET_IP_ALIGN;
2265
2266         skb = netdev_alloc_skb(dev, rx_buf_sz + pad);
2267         if (!skb)
2268                 goto err_out;
2269
2270         skb_reserve(skb, align ? ((pad - 1) & (unsigned long)skb->data) : pad);
2271
2272         mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
2273                                  PCI_DMA_FROMDEVICE);
2274
2275         rtl8169_map_to_asic(desc, mapping, rx_buf_sz);
2276 out:
2277         return skb;
2278
2279 err_out:
2280         rtl8169_make_unusable_by_asic(desc);
2281         goto out;
2282 }
2283
2284 static void rtl8169_rx_clear(struct rtl8169_private *tp)
2285 {
2286         unsigned int i;
2287
2288         for (i = 0; i < NUM_RX_DESC; i++) {
2289                 if (tp->Rx_skbuff[i]) {
2290                         rtl8169_free_rx_skb(tp, tp->Rx_skbuff + i,
2291                                             tp->RxDescArray + i);
2292                 }
2293         }
2294 }
2295
2296 static u32 rtl8169_rx_fill(struct rtl8169_private *tp, struct net_device *dev,
2297                            u32 start, u32 end)
2298 {
2299         u32 cur;
2300
2301         for (cur = start; end - cur != 0; cur++) {
2302                 struct sk_buff *skb;
2303                 unsigned int i = cur % NUM_RX_DESC;
2304
2305                 WARN_ON((s32)(end - cur) < 0);
2306
2307                 if (tp->Rx_skbuff[i])
2308                         continue;
2309
2310                 skb = rtl8169_alloc_rx_skb(tp->pci_dev, dev,
2311                                            tp->RxDescArray + i,
2312                                            tp->rx_buf_sz, tp->align);
2313                 if (!skb)
2314                         break;
2315
2316                 tp->Rx_skbuff[i] = skb;
2317         }
2318         return cur - start;
2319 }
2320
2321 static inline void rtl8169_mark_as_last_descriptor(struct RxDesc *desc)
2322 {
2323         desc->opts1 |= cpu_to_le32(RingEnd);
2324 }
2325
2326 static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)
2327 {
2328         tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
2329 }
2330
2331 static int rtl8169_init_ring(struct net_device *dev)
2332 {
2333         struct rtl8169_private *tp = netdev_priv(dev);
2334
2335         rtl8169_init_ring_indexes(tp);
2336
2337         memset(tp->tx_skb, 0x0, NUM_TX_DESC * sizeof(struct ring_info));
2338         memset(tp->Rx_skbuff, 0x0, NUM_RX_DESC * sizeof(struct sk_buff *));
2339
2340         if (rtl8169_rx_fill(tp, dev, 0, NUM_RX_DESC) != NUM_RX_DESC)
2341                 goto err_out;
2342
2343         rtl8169_mark_as_last_descriptor(tp->RxDescArray + NUM_RX_DESC - 1);
2344
2345         return 0;
2346
2347 err_out:
2348         rtl8169_rx_clear(tp);
2349         return -ENOMEM;
2350 }
2351
2352 static void rtl8169_unmap_tx_skb(struct pci_dev *pdev, struct ring_info *tx_skb,
2353                                  struct TxDesc *desc)
2354 {
2355         unsigned int len = tx_skb->len;
2356
2357         pci_unmap_single(pdev, le64_to_cpu(desc->addr), len, PCI_DMA_TODEVICE);
2358         desc->opts1 = 0x00;
2359         desc->opts2 = 0x00;
2360         desc->addr = 0x00;
2361         tx_skb->len = 0;
2362 }
2363
2364 static void rtl8169_tx_clear(struct rtl8169_private *tp)
2365 {
2366         unsigned int i;
2367
2368         for (i = tp->dirty_tx; i < tp->dirty_tx + NUM_TX_DESC; i++) {
2369                 unsigned int entry = i % NUM_TX_DESC;
2370                 struct ring_info *tx_skb = tp->tx_skb + entry;
2371                 unsigned int len = tx_skb->len;
2372
2373                 if (len) {
2374                         struct sk_buff *skb = tx_skb->skb;
2375
2376                         rtl8169_unmap_tx_skb(tp->pci_dev, tx_skb,
2377                                              tp->TxDescArray + entry);
2378                         if (skb) {
2379                                 dev_kfree_skb(skb);
2380                                 tx_skb->skb = NULL;
2381                         }
2382                         tp->dev->stats.tx_dropped++;
2383                 }
2384         }
2385         tp->cur_tx = tp->dirty_tx = 0;
2386 }
2387
2388 static void rtl8169_schedule_work(struct net_device *dev, work_func_t task)
2389 {
2390         struct rtl8169_private *tp = netdev_priv(dev);
2391
2392         PREPARE_DELAYED_WORK(&tp->task, task);
2393         schedule_delayed_work(&tp->task, 4);
2394 }
2395
2396 static void rtl8169_wait_for_quiescence(struct net_device *dev)
2397 {
2398         struct rtl8169_private *tp = netdev_priv(dev);
2399         void __iomem *ioaddr = tp->mmio_addr;
2400
2401         synchronize_irq(dev->irq);
2402
2403         /* Wait for any pending NAPI task to complete */
2404 #ifdef CONFIG_R8169_NAPI
2405         napi_disable(&tp->napi);
2406 #endif
2407
2408         rtl8169_irq_mask_and_ack(ioaddr);
2409
2410 #ifdef CONFIG_R8169_NAPI
2411         napi_enable(&tp->napi);
2412 #endif
2413 }
2414
2415 static void rtl8169_reinit_task(struct work_struct *work)
2416 {
2417         struct rtl8169_private *tp =
2418                 container_of(work, struct rtl8169_private, task.work);
2419         struct net_device *dev = tp->dev;
2420         int ret;
2421
2422         rtnl_lock();
2423
2424         if (!netif_running(dev))
2425                 goto out_unlock;
2426
2427         rtl8169_wait_for_quiescence(dev);
2428         rtl8169_close(dev);
2429
2430         ret = rtl8169_open(dev);
2431         if (unlikely(ret < 0)) {
2432                 if (net_ratelimit() && netif_msg_drv(tp)) {
2433                         printk(KERN_ERR PFX "%s: reinit failure (status = %d)."
2434                                " Rescheduling.\n", dev->name, ret);
2435                 }
2436                 rtl8169_schedule_work(dev, rtl8169_reinit_task);
2437         }
2438
2439 out_unlock:
2440         rtnl_unlock();
2441 }
2442
2443 static void rtl8169_reset_task(struct work_struct *work)
2444 {
2445         struct rtl8169_private *tp =
2446                 container_of(work, struct rtl8169_private, task.work);
2447         struct net_device *dev = tp->dev;
2448
2449         rtnl_lock();
2450
2451         if (!netif_running(dev))
2452                 goto out_unlock;
2453
2454         rtl8169_wait_for_quiescence(dev);
2455
2456         rtl8169_rx_interrupt(dev, tp, tp->mmio_addr, ~(u32)0);
2457         rtl8169_tx_clear(tp);
2458
2459         if (tp->dirty_rx == tp->cur_rx) {
2460                 rtl8169_init_ring_indexes(tp);
2461                 rtl_hw_start(dev);
2462                 netif_wake_queue(dev);
2463                 rtl8169_check_link_status(dev, tp, tp->mmio_addr);
2464         } else {
2465                 if (net_ratelimit() && netif_msg_intr(tp)) {
2466                         printk(KERN_EMERG PFX "%s: Rx buffers shortage\n",
2467                                dev->name);
2468                 }
2469                 rtl8169_schedule_work(dev, rtl8169_reset_task);
2470         }
2471
2472 out_unlock:
2473         rtnl_unlock();
2474 }
2475
2476 static void rtl8169_tx_timeout(struct net_device *dev)
2477 {
2478         struct rtl8169_private *tp = netdev_priv(dev);
2479
2480         rtl8169_hw_reset(tp->mmio_addr);
2481
2482         /* Let's wait a bit while any (async) irq lands on */
2483         rtl8169_schedule_work(dev, rtl8169_reset_task);
2484 }
2485
2486 static int rtl8169_xmit_frags(struct rtl8169_private *tp, struct sk_buff *skb,
2487                               u32 opts1)
2488 {
2489         struct skb_shared_info *info = skb_shinfo(skb);
2490         unsigned int cur_frag, entry;
2491         struct TxDesc * uninitialized_var(txd);
2492
2493         entry = tp->cur_tx;
2494         for (cur_frag = 0; cur_frag < info->nr_frags; cur_frag++) {
2495                 skb_frag_t *frag = info->frags + cur_frag;
2496                 dma_addr_t mapping;
2497                 u32 status, len;
2498                 void *addr;
2499
2500                 entry = (entry + 1) % NUM_TX_DESC;
2501
2502                 txd = tp->TxDescArray + entry;
2503                 len = frag->size;
2504                 addr = ((void *) page_address(frag->page)) + frag->page_offset;
2505                 mapping = pci_map_single(tp->pci_dev, addr, len, PCI_DMA_TODEVICE);
2506
2507                 /* anti gcc 2.95.3 bugware (sic) */
2508                 status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC));
2509
2510                 txd->opts1 = cpu_to_le32(status);
2511                 txd->addr = cpu_to_le64(mapping);
2512
2513                 tp->tx_skb[entry].len = len;
2514         }
2515
2516         if (cur_frag) {
2517                 tp->tx_skb[entry].skb = skb;
2518                 txd->opts1 |= cpu_to_le32(LastFrag);
2519         }
2520
2521         return cur_frag;
2522 }
2523
2524 static inline u32 rtl8169_tso_csum(struct sk_buff *skb, struct net_device *dev)
2525 {
2526         if (dev->features & NETIF_F_TSO) {
2527                 u32 mss = skb_shinfo(skb)->gso_size;
2528
2529                 if (mss)
2530                         return LargeSend | ((mss & MSSMask) << MSSShift);
2531         }
2532         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2533                 const struct iphdr *ip = ip_hdr(skb);
2534
2535                 if (ip->protocol == IPPROTO_TCP)
2536                         return IPCS | TCPCS;
2537                 else if (ip->protocol == IPPROTO_UDP)
2538                         return IPCS | UDPCS;
2539                 WARN_ON(1);     /* we need a WARN() */
2540         }
2541         return 0;
2542 }
2543
2544 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev)
2545 {
2546         struct rtl8169_private *tp = netdev_priv(dev);
2547         unsigned int frags, entry = tp->cur_tx % NUM_TX_DESC;
2548         struct TxDesc *txd = tp->TxDescArray + entry;
2549         void __iomem *ioaddr = tp->mmio_addr;
2550         dma_addr_t mapping;
2551         u32 status, len;
2552         u32 opts1;
2553         int ret = NETDEV_TX_OK;
2554
2555         if (unlikely(TX_BUFFS_AVAIL(tp) < skb_shinfo(skb)->nr_frags)) {
2556                 if (netif_msg_drv(tp)) {
2557                         printk(KERN_ERR
2558                                "%s: BUG! Tx Ring full when queue awake!\n",
2559                                dev->name);
2560                 }
2561                 goto err_stop;
2562         }
2563
2564         if (unlikely(le32_to_cpu(txd->opts1) & DescOwn))
2565                 goto err_stop;
2566
2567         opts1 = DescOwn | rtl8169_tso_csum(skb, dev);
2568
2569         frags = rtl8169_xmit_frags(tp, skb, opts1);
2570         if (frags) {
2571                 len = skb_headlen(skb);
2572                 opts1 |= FirstFrag;
2573         } else {
2574                 len = skb->len;
2575
2576                 if (unlikely(len < ETH_ZLEN)) {
2577                         if (skb_padto(skb, ETH_ZLEN))
2578                                 goto err_update_stats;
2579                         len = ETH_ZLEN;
2580                 }
2581
2582                 opts1 |= FirstFrag | LastFrag;
2583                 tp->tx_skb[entry].skb = skb;
2584         }
2585
2586         mapping = pci_map_single(tp->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
2587
2588         tp->tx_skb[entry].len = len;
2589         txd->addr = cpu_to_le64(mapping);
2590         txd->opts2 = cpu_to_le32(rtl8169_tx_vlan_tag(tp, skb));
2591
2592         wmb();
2593
2594         /* anti gcc 2.95.3 bugware (sic) */
2595         status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC));
2596         txd->opts1 = cpu_to_le32(status);
2597
2598         dev->trans_start = jiffies;
2599
2600         tp->cur_tx += frags + 1;
2601
2602         smp_wmb();
2603
2604         RTL_W8(TxPoll, NPQ);    /* set polling bit */
2605
2606         if (TX_BUFFS_AVAIL(tp) < MAX_SKB_FRAGS) {
2607                 netif_stop_queue(dev);
2608                 smp_rmb();
2609                 if (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)
2610                         netif_wake_queue(dev);
2611         }
2612
2613 out:
2614         return ret;
2615
2616 err_stop:
2617         netif_stop_queue(dev);
2618         ret = NETDEV_TX_BUSY;
2619 err_update_stats:
2620         dev->stats.tx_dropped++;
2621         goto out;
2622 }
2623
2624 static void rtl8169_pcierr_interrupt(struct net_device *dev)
2625 {
2626         struct rtl8169_private *tp = netdev_priv(dev);
2627         struct pci_dev *pdev = tp->pci_dev;
2628         void __iomem *ioaddr = tp->mmio_addr;
2629         u16 pci_status, pci_cmd;
2630
2631         pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
2632         pci_read_config_word(pdev, PCI_STATUS, &pci_status);
2633
2634         if (netif_msg_intr(tp)) {
2635                 printk(KERN_ERR
2636                        "%s: PCI error (cmd = 0x%04x, status = 0x%04x).\n",
2637                        dev->name, pci_cmd, pci_status);
2638         }
2639
2640         /*
2641          * The recovery sequence below admits a very elaborated explanation:
2642          * - it seems to work;
2643          * - I did not see what else could be done;
2644          * - it makes iop3xx happy.
2645          *
2646          * Feel free to adjust to your needs.
2647          */
2648         if (pdev->broken_parity_status)
2649                 pci_cmd &= ~PCI_COMMAND_PARITY;
2650         else
2651                 pci_cmd |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY;
2652
2653         pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
2654
2655         pci_write_config_word(pdev, PCI_STATUS,
2656                 pci_status & (PCI_STATUS_DETECTED_PARITY |
2657                 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_REC_MASTER_ABORT |
2658                 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_SIG_TARGET_ABORT));
2659
2660         /* The infamous DAC f*ckup only happens at boot time */
2661         if ((tp->cp_cmd & PCIDAC) && !tp->dirty_rx && !tp->cur_rx) {
2662                 if (netif_msg_intr(tp))
2663                         printk(KERN_INFO "%s: disabling PCI DAC.\n", dev->name);
2664                 tp->cp_cmd &= ~PCIDAC;
2665                 RTL_W16(CPlusCmd, tp->cp_cmd);
2666                 dev->features &= ~NETIF_F_HIGHDMA;
2667         }
2668
2669         rtl8169_hw_reset(ioaddr);
2670
2671         rtl8169_schedule_work(dev, rtl8169_reinit_task);
2672 }
2673
2674 static void rtl8169_tx_interrupt(struct net_device *dev,
2675                                  struct rtl8169_private *tp,
2676                                  void __iomem *ioaddr)
2677 {
2678         unsigned int dirty_tx, tx_left;
2679
2680         dirty_tx = tp->dirty_tx;
2681         smp_rmb();
2682         tx_left = tp->cur_tx - dirty_tx;
2683
2684         while (tx_left > 0) {
2685                 unsigned int entry = dirty_tx % NUM_TX_DESC;
2686                 struct ring_info *tx_skb = tp->tx_skb + entry;
2687                 u32 len = tx_skb->len;
2688                 u32 status;
2689
2690                 rmb();
2691                 status = le32_to_cpu(tp->TxDescArray[entry].opts1);
2692                 if (status & DescOwn)
2693                         break;
2694
2695                 dev->stats.tx_bytes += len;
2696                 dev->stats.tx_packets++;
2697
2698                 rtl8169_unmap_tx_skb(tp->pci_dev, tx_skb, tp->TxDescArray + entry);
2699
2700                 if (status & LastFrag) {
2701                         dev_kfree_skb_irq(tx_skb->skb);
2702                         tx_skb->skb = NULL;
2703                 }
2704                 dirty_tx++;
2705                 tx_left--;
2706         }
2707
2708         if (tp->dirty_tx != dirty_tx) {
2709                 tp->dirty_tx = dirty_tx;
2710                 smp_wmb();
2711                 if (netif_queue_stopped(dev) &&
2712                     (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)) {
2713                         netif_wake_queue(dev);
2714                 }
2715                 /*
2716                  * 8168 hack: TxPoll requests are lost when the Tx packets are
2717                  * too close. Let's kick an extra TxPoll request when a burst
2718                  * of start_xmit activity is detected (if it is not detected,
2719                  * it is slow enough). -- FR
2720                  */
2721                 smp_rmb();
2722                 if (tp->cur_tx != dirty_tx)
2723                         RTL_W8(TxPoll, NPQ);
2724         }
2725 }
2726
2727 static inline int rtl8169_fragmented_frame(u32 status)
2728 {
2729         return (status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag);
2730 }
2731
2732 static inline void rtl8169_rx_csum(struct sk_buff *skb, struct RxDesc *desc)
2733 {
2734         u32 opts1 = le32_to_cpu(desc->opts1);
2735         u32 status = opts1 & RxProtoMask;
2736
2737         if (((status == RxProtoTCP) && !(opts1 & TCPFail)) ||
2738             ((status == RxProtoUDP) && !(opts1 & UDPFail)) ||
2739             ((status == RxProtoIP) && !(opts1 & IPFail)))
2740                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2741         else
2742                 skb->ip_summed = CHECKSUM_NONE;
2743 }
2744
2745 static inline bool rtl8169_try_rx_copy(struct sk_buff **sk_buff,
2746                                        struct rtl8169_private *tp, int pkt_size,
2747                                        dma_addr_t addr)
2748 {
2749         struct sk_buff *skb;
2750         bool done = false;
2751
2752         if (pkt_size >= rx_copybreak)
2753                 goto out;
2754
2755         skb = netdev_alloc_skb(tp->dev, pkt_size + NET_IP_ALIGN);
2756         if (!skb)
2757                 goto out;
2758
2759         pci_dma_sync_single_for_cpu(tp->pci_dev, addr, pkt_size,
2760                                     PCI_DMA_FROMDEVICE);
2761         skb_reserve(skb, NET_IP_ALIGN);
2762         skb_copy_from_linear_data(*sk_buff, skb->data, pkt_size);
2763         *sk_buff = skb;
2764         done = true;
2765 out:
2766         return done;
2767 }
2768
2769 static int rtl8169_rx_interrupt(struct net_device *dev,
2770                                 struct rtl8169_private *tp,
2771                                 void __iomem *ioaddr, u32 budget)
2772 {
2773         unsigned int cur_rx, rx_left;
2774         unsigned int delta, count;
2775
2776         cur_rx = tp->cur_rx;
2777         rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
2778         rx_left = rtl8169_rx_quota(rx_left, budget);
2779
2780         for (; rx_left > 0; rx_left--, cur_rx++) {
2781                 unsigned int entry = cur_rx % NUM_RX_DESC;
2782                 struct RxDesc *desc = tp->RxDescArray + entry;
2783                 u32 status;
2784
2785                 rmb();
2786                 status = le32_to_cpu(desc->opts1);
2787
2788                 if (status & DescOwn)
2789                         break;
2790                 if (unlikely(status & RxRES)) {
2791                         if (netif_msg_rx_err(tp)) {
2792                                 printk(KERN_INFO
2793                                        "%s: Rx ERROR. status = %08x\n",
2794                                        dev->name, status);
2795                         }
2796                         dev->stats.rx_errors++;
2797                         if (status & (RxRWT | RxRUNT))
2798                                 dev->stats.rx_length_errors++;
2799                         if (status & RxCRC)
2800                                 dev->stats.rx_crc_errors++;
2801                         if (status & RxFOVF) {
2802                                 rtl8169_schedule_work(dev, rtl8169_reset_task);
2803                                 dev->stats.rx_fifo_errors++;
2804                         }
2805                         rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2806                 } else {
2807                         struct sk_buff *skb = tp->Rx_skbuff[entry];
2808                         dma_addr_t addr = le64_to_cpu(desc->addr);
2809                         int pkt_size = (status & 0x00001FFF) - 4;
2810                         struct pci_dev *pdev = tp->pci_dev;
2811
2812                         /*
2813                          * The driver does not support incoming fragmented
2814                          * frames. They are seen as a symptom of over-mtu
2815                          * sized frames.
2816                          */
2817                         if (unlikely(rtl8169_fragmented_frame(status))) {
2818                                 dev->stats.rx_dropped++;
2819                                 dev->stats.rx_length_errors++;
2820                                 rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2821                                 continue;
2822                         }
2823
2824                         rtl8169_rx_csum(skb, desc);
2825
2826                         if (rtl8169_try_rx_copy(&skb, tp, pkt_size, addr)) {
2827                                 pci_dma_sync_single_for_device(pdev, addr,
2828                                         pkt_size, PCI_DMA_FROMDEVICE);
2829                                 rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2830                         } else {
2831                                 pci_unmap_single(pdev, addr, pkt_size,
2832                                                  PCI_DMA_FROMDEVICE);
2833                                 tp->Rx_skbuff[entry] = NULL;
2834                         }
2835
2836                         skb_put(skb, pkt_size);
2837                         skb->protocol = eth_type_trans(skb, dev);
2838
2839                         if (rtl8169_rx_vlan_skb(tp, desc, skb) < 0)
2840                                 rtl8169_rx_skb(skb);
2841
2842                         dev->last_rx = jiffies;
2843                         dev->stats.rx_bytes += pkt_size;
2844                         dev->stats.rx_packets++;
2845                 }
2846
2847                 /* Work around for AMD plateform. */
2848                 if ((desc->opts2 & 0xfffe000) &&
2849                     (tp->mac_version == RTL_GIGA_MAC_VER_05)) {
2850                         desc->opts2 = 0;
2851                         cur_rx++;
2852                 }
2853         }
2854
2855         count = cur_rx - tp->cur_rx;
2856         tp->cur_rx = cur_rx;
2857
2858         delta = rtl8169_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);
2859         if (!delta && count && netif_msg_intr(tp))
2860                 printk(KERN_INFO "%s: no Rx buffer allocated\n", dev->name);
2861         tp->dirty_rx += delta;
2862
2863         /*
2864          * FIXME: until there is periodic timer to try and refill the ring,
2865          * a temporary shortage may definitely kill the Rx process.
2866          * - disable the asic to try and avoid an overflow and kick it again
2867          *   after refill ?
2868          * - how do others driver handle this condition (Uh oh...).
2869          */
2870         if ((tp->dirty_rx + NUM_RX_DESC == tp->cur_rx) && netif_msg_intr(tp))
2871                 printk(KERN_EMERG "%s: Rx buffers exhausted\n", dev->name);
2872
2873         return count;
2874 }
2875
2876 static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
2877 {
2878         struct net_device *dev = dev_instance;
2879         struct rtl8169_private *tp = netdev_priv(dev);
2880         int boguscnt = max_interrupt_work;
2881         void __iomem *ioaddr = tp->mmio_addr;
2882         int status;
2883         int handled = 0;
2884
2885         do {
2886                 status = RTL_R16(IntrStatus);
2887
2888                 /* hotplug/major error/no more work/shared irq */
2889                 if ((status == 0xFFFF) || !status)
2890                         break;
2891
2892                 handled = 1;
2893
2894                 if (unlikely(!netif_running(dev))) {
2895                         rtl8169_asic_down(ioaddr);
2896                         goto out;
2897                 }
2898
2899                 status &= tp->intr_mask;
2900                 RTL_W16(IntrStatus,
2901                         (status & RxFIFOOver) ? (status | RxOverflow) : status);
2902
2903                 if (!(status & tp->intr_event))
2904                         break;
2905
2906                 /* Work around for rx fifo overflow */
2907                 if (unlikely(status & RxFIFOOver) &&
2908                     (tp->mac_version == RTL_GIGA_MAC_VER_11)) {
2909                         netif_stop_queue(dev);
2910                         rtl8169_tx_timeout(dev);
2911                         break;
2912                 }
2913
2914                 if (unlikely(status & SYSErr)) {
2915                         rtl8169_pcierr_interrupt(dev);
2916                         break;
2917                 }
2918
2919                 if (status & LinkChg)
2920                         rtl8169_check_link_status(dev, tp, ioaddr);
2921
2922 #ifdef CONFIG_R8169_NAPI
2923                 if (status & tp->napi_event) {
2924                         RTL_W16(IntrMask, tp->intr_event & ~tp->napi_event);
2925                         tp->intr_mask = ~tp->napi_event;
2926
2927                 if (likely(netif_rx_schedule_prep(dev, &tp->napi)))
2928                         __netif_rx_schedule(dev, &tp->napi);
2929                         else if (netif_msg_intr(tp)) {
2930                                 printk(KERN_INFO "%s: interrupt %04x in poll\n",
2931                                        dev->name, status);
2932                         }
2933                 }
2934                 break;
2935 #else
2936                 /* Rx interrupt */
2937                 if (status & (RxOK | RxOverflow | RxFIFOOver))
2938                         rtl8169_rx_interrupt(dev, tp, ioaddr, ~(u32)0);
2939
2940                 /* Tx interrupt */
2941                 if (status & (TxOK | TxErr))
2942                         rtl8169_tx_interrupt(dev, tp, ioaddr);
2943 #endif
2944
2945                 boguscnt--;
2946         } while (boguscnt > 0);
2947
2948         if (boguscnt <= 0) {
2949                 if (netif_msg_intr(tp) && net_ratelimit() ) {
2950                         printk(KERN_WARNING
2951                                "%s: Too much work at interrupt!\n", dev->name);
2952                 }
2953                 /* Clear all interrupt sources. */
2954                 RTL_W16(IntrStatus, 0xffff);
2955         }
2956 out:
2957         return IRQ_RETVAL(handled);
2958 }
2959
2960 #ifdef CONFIG_R8169_NAPI
2961 static int rtl8169_poll(struct napi_struct *napi, int budget)
2962 {
2963         struct rtl8169_private *tp = container_of(napi, struct rtl8169_private, napi);
2964         struct net_device *dev = tp->dev;
2965         void __iomem *ioaddr = tp->mmio_addr;
2966         int work_done;
2967
2968         work_done = rtl8169_rx_interrupt(dev, tp, ioaddr, (u32) budget);
2969         rtl8169_tx_interrupt(dev, tp, ioaddr);
2970
2971         if (work_done < budget) {
2972                 netif_rx_complete(dev, napi);
2973                 tp->intr_mask = 0xffff;
2974                 /*
2975                  * 20040426: the barrier is not strictly required but the
2976                  * behavior of the irq handler could be less predictable
2977                  * without it. Btw, the lack of flush for the posted pci
2978                  * write is safe - FR
2979                  */
2980                 smp_wmb();
2981                 RTL_W16(IntrMask, tp->intr_event);
2982         }
2983
2984         return work_done;
2985 }
2986 #endif
2987
2988 static void rtl8169_down(struct net_device *dev)
2989 {
2990         struct rtl8169_private *tp = netdev_priv(dev);
2991         void __iomem *ioaddr = tp->mmio_addr;
2992         unsigned int poll_locked = 0;
2993         unsigned int intrmask;
2994
2995         rtl8169_delete_timer(dev);
2996
2997         netif_stop_queue(dev);
2998
2999 core_down:
3000         spin_lock_irq(&tp->lock);
3001
3002         rtl8169_asic_down(ioaddr);
3003
3004         /* Update the error counts. */
3005         dev->stats.rx_missed_errors += RTL_R32(RxMissed);
3006         RTL_W32(RxMissed, 0);
3007
3008         spin_unlock_irq(&tp->lock);
3009
3010         synchronize_irq(dev->irq);
3011
3012         if (!poll_locked) {
3013                 napi_disable(&tp->napi);
3014                 poll_locked++;
3015         }
3016
3017         /* Give a racing hard_start_xmit a few cycles to complete. */
3018         synchronize_sched();  /* FIXME: should this be synchronize_irq()? */
3019
3020         /*
3021          * And now for the 50k$ question: are IRQ disabled or not ?
3022          *
3023          * Two paths lead here:
3024          * 1) dev->close
3025          *    -> netif_running() is available to sync the current code and the
3026          *       IRQ handler. See rtl8169_interrupt for details.
3027          * 2) dev->change_mtu
3028          *    -> rtl8169_poll can not be issued again and re-enable the
3029          *       interruptions. Let's simply issue the IRQ down sequence again.
3030          *
3031          * No loop if hotpluged or major error (0xffff).
3032          */
3033         intrmask = RTL_R16(IntrMask);
3034         if (intrmask && (intrmask != 0xffff))
3035                 goto core_down;
3036
3037         rtl8169_tx_clear(tp);
3038
3039         rtl8169_rx_clear(tp);
3040 }
3041
3042 static int rtl8169_close(struct net_device *dev)
3043 {
3044         struct rtl8169_private *tp = netdev_priv(dev);
3045         struct pci_dev *pdev = tp->pci_dev;
3046
3047         rtl8169_down(dev);
3048
3049         free_irq(dev->irq, dev);
3050
3051         pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
3052                             tp->RxPhyAddr);
3053         pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
3054                             tp->TxPhyAddr);
3055         tp->TxDescArray = NULL;
3056         tp->RxDescArray = NULL;
3057
3058         return 0;
3059 }
3060
3061 static void rtl_set_rx_mode(struct net_device *dev)
3062 {
3063         struct rtl8169_private *tp = netdev_priv(dev);
3064         void __iomem *ioaddr = tp->mmio_addr;
3065         unsigned long flags;
3066         u32 mc_filter[2];       /* Multicast hash filter */
3067         int rx_mode;
3068         u32 tmp = 0;
3069
3070         if (dev->flags & IFF_PROMISC) {
3071                 /* Unconditionally log net taps. */
3072                 if (netif_msg_link(tp)) {
3073                         printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n",
3074                                dev->name);
3075                 }
3076                 rx_mode =
3077                     AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
3078                     AcceptAllPhys;
3079                 mc_filter[1] = mc_filter[0] = 0xffffffff;
3080         } else if ((dev->mc_count > multicast_filter_limit)
3081                    || (dev->flags & IFF_ALLMULTI)) {
3082                 /* Too many to filter perfectly -- accept all multicasts. */
3083                 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
3084                 mc_filter[1] = mc_filter[0] = 0xffffffff;
3085         } else {
3086                 struct dev_mc_list *mclist;
3087                 unsigned int i;
3088
3089                 rx_mode = AcceptBroadcast | AcceptMyPhys;
3090                 mc_filter[1] = mc_filter[0] = 0;
3091                 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
3092                      i++, mclist = mclist->next) {
3093                         int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
3094                         mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
3095                         rx_mode |= AcceptMulticast;
3096                 }
3097         }
3098
3099         spin_lock_irqsave(&tp->lock, flags);
3100
3101         tmp = rtl8169_rx_config | rx_mode |
3102               (RTL_R32(RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
3103
3104         if ((tp->mac_version == RTL_GIGA_MAC_VER_11) ||
3105             (tp->mac_version == RTL_GIGA_MAC_VER_12) ||
3106             (tp->mac_version == RTL_GIGA_MAC_VER_13) ||
3107             (tp->mac_version == RTL_GIGA_MAC_VER_14) ||
3108             (tp->mac_version == RTL_GIGA_MAC_VER_15) ||
3109             (tp->mac_version == RTL_GIGA_MAC_VER_16) ||
3110             (tp->mac_version == RTL_GIGA_MAC_VER_17)) {
3111                 mc_filter[0] = 0xffffffff;
3112                 mc_filter[1] = 0xffffffff;
3113         }
3114
3115         RTL_W32(MAR0 + 0, mc_filter[0]);
3116         RTL_W32(MAR0 + 4, mc_filter[1]);
3117
3118         RTL_W32(RxConfig, tmp);
3119
3120         spin_unlock_irqrestore(&tp->lock, flags);
3121 }
3122
3123 /**
3124  *  rtl8169_get_stats - Get rtl8169 read/write statistics
3125  *  @dev: The Ethernet Device to get statistics for
3126  *
3127  *  Get TX/RX statistics for rtl8169
3128  */
3129 static struct net_device_stats *rtl8169_get_stats(struct net_device *dev)
3130 {
3131         struct rtl8169_private *tp = netdev_priv(dev);
3132         void __iomem *ioaddr = tp->mmio_addr;
3133         unsigned long flags;
3134
3135         if (netif_running(dev)) {
3136                 spin_lock_irqsave(&tp->lock, flags);
3137                 dev->stats.rx_missed_errors += RTL_R32(RxMissed);
3138                 RTL_W32(RxMissed, 0);
3139                 spin_unlock_irqrestore(&tp->lock, flags);
3140         }
3141
3142         return &dev->stats;
3143 }
3144
3145 #ifdef CONFIG_PM
3146
3147 static int rtl8169_suspend(struct pci_dev *pdev, pm_message_t state)
3148 {
3149         struct net_device *dev = pci_get_drvdata(pdev);
3150         struct rtl8169_private *tp = netdev_priv(dev);
3151         void __iomem *ioaddr = tp->mmio_addr;
3152
3153         if (!netif_running(dev))
3154                 goto out_pci_suspend;
3155
3156         netif_device_detach(dev);
3157         netif_stop_queue(dev);
3158
3159         spin_lock_irq(&tp->lock);
3160
3161         rtl8169_asic_down(ioaddr);
3162
3163         dev->stats.rx_missed_errors += RTL_R32(RxMissed);
3164         RTL_W32(RxMissed, 0);
3165
3166         spin_unlock_irq(&tp->lock);
3167
3168 out_pci_suspend:
3169         pci_save_state(pdev);
3170         pci_enable_wake(pdev, pci_choose_state(pdev, state),
3171                 (tp->features & RTL_FEATURE_WOL) ? 1 : 0);
3172         pci_set_power_state(pdev, pci_choose_state(pdev, state));
3173
3174         return 0;
3175 }
3176
3177 static int rtl8169_resume(struct pci_dev *pdev)
3178 {
3179         struct net_device *dev = pci_get_drvdata(pdev);
3180
3181         pci_set_power_state(pdev, PCI_D0);
3182         pci_restore_state(pdev);
3183         pci_enable_wake(pdev, PCI_D0, 0);
3184
3185         if (!netif_running(dev))
3186                 goto out;
3187
3188         netif_device_attach(dev);
3189
3190         rtl8169_schedule_work(dev, rtl8169_reset_task);
3191 out:
3192         return 0;
3193 }
3194
3195 #endif /* CONFIG_PM */
3196
3197 static struct pci_driver rtl8169_pci_driver = {
3198         .name           = MODULENAME,
3199         .id_table       = rtl8169_pci_tbl,
3200         .probe          = rtl8169_init_one,
3201         .remove         = __devexit_p(rtl8169_remove_one),
3202 #ifdef CONFIG_PM
3203         .suspend        = rtl8169_suspend,
3204         .resume         = rtl8169_resume,
3205 #endif
3206 };
3207
3208 static int __init rtl8169_init_module(void)
3209 {
3210         return pci_register_driver(&rtl8169_pci_driver);
3211 }
3212
3213 static void __exit rtl8169_cleanup_module(void)
3214 {
3215         pci_unregister_driver(&rtl8169_pci_driver);
3216 }
3217
3218 module_init(rtl8169_init_module);
3219 module_exit(rtl8169_cleanup_module);