err.no Git - linux-2.6/blob - 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         { 0x0001,                               0x8168,
 175                 PCI_ANY_ID, 0x2410, 0, 0, RTL_CFG_2 },
 176         {0,},
 177 };
 178
 179 MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl);
 180
 181 static int rx_copybreak = 200;
 182 static int use_dac;
 183 static struct {
 184         u32 msg_enable;
 185 } debug = { -1 };
 186
 187 enum rtl_registers {
 188         MAC0            = 0,    /* Ethernet hardware address. */
 189         MAC4            = 4,
 190         MAR0            = 8,    /* Multicast filter. */
 191         CounterAddrLow          = 0x10,
 192         CounterAddrHigh         = 0x14,
 193         TxDescStartAddrLow      = 0x20,
 194         TxDescStartAddrHigh     = 0x24,
 195         TxHDescStartAddrLow     = 0x28,
 196         TxHDescStartAddrHigh    = 0x2c,
 197         FLASH           = 0x30,
 198         ERSR            = 0x36,
 199         ChipCmd         = 0x37,
 200         TxPoll          = 0x38,
 201         IntrMask        = 0x3c,
 202         IntrStatus      = 0x3e,
 203         TxConfig        = 0x40,
 204         RxConfig        = 0x44,
 205         RxMissed        = 0x4c,
 206         Cfg9346         = 0x50,
 207         Config0         = 0x51,
 208         Config1         = 0x52,
 209         Config2         = 0x53,
 210         Config3         = 0x54,
 211         Config4         = 0x55,
 212         Config5         = 0x56,
 213         MultiIntr       = 0x5c,
 214         PHYAR           = 0x60,
 215         TBICSR          = 0x64,
 216         TBI_ANAR        = 0x68,
 217         TBI_LPAR        = 0x6a,
 218         PHYstatus       = 0x6c,
 219         RxMaxSize       = 0xda,
 220         CPlusCmd        = 0xe0,
 221         IntrMitigate    = 0xe2,
 222         RxDescAddrLow   = 0xe4,
 223         RxDescAddrHigh  = 0xe8,
 224         EarlyTxThres    = 0xec,
 225         FuncEvent       = 0xf0,
 226         FuncEventMask   = 0xf4,
 227         FuncPresetState = 0xf8,
 228         FuncForceEvent  = 0xfc,
 229 };
 230
 231 enum rtl_register_content {
 232         /* InterruptStatusBits */
 233         SYSErr          = 0x8000,
 234         PCSTimeout      = 0x4000,
 235         SWInt           = 0x0100,
 236         TxDescUnavail   = 0x0080,
 237         RxFIFOOver      = 0x0040,
 238         LinkChg         = 0x0020,
 239         RxOverflow      = 0x0010,
 240         TxErr           = 0x0008,
 241         TxOK            = 0x0004,
 242         RxErr           = 0x0002,
 243         RxOK            = 0x0001,
 244
 245         /* RxStatusDesc */
 246         RxFOVF  = (1 << 23),
 247         RxRWT   = (1 << 22),
 248         RxRES   = (1 << 21),
 249         RxRUNT  = (1 << 20),
 250         RxCRC   = (1 << 19),
 251
 252         /* ChipCmdBits */
 253         CmdReset        = 0x10,
 254         CmdRxEnb        = 0x08,
 255         CmdTxEnb        = 0x04,
 256         RxBufEmpty      = 0x01,
 257
 258         /* TXPoll register p.5 */
 259         HPQ             = 0x80,         /* Poll cmd on the high prio queue */
 260         NPQ             = 0x40,         /* Poll cmd on the low prio queue */
 261         FSWInt          = 0x01,         /* Forced software interrupt */
 262
 263         /* Cfg9346Bits */
 264         Cfg9346_Lock    = 0x00,
 265         Cfg9346_Unlock  = 0xc0,
 266
 267         /* rx_mode_bits */
 268         AcceptErr       = 0x20,
 269         AcceptRunt      = 0x10,
 270         AcceptBroadcast = 0x08,
 271         AcceptMulticast = 0x04,
 272         AcceptMyPhys    = 0x02,
 273         AcceptAllPhys   = 0x01,
 274
 275         /* RxConfigBits */
 276         RxCfgFIFOShift  = 13,
 277         RxCfgDMAShift   =  8,
 278
 279         /* TxConfigBits */
 280         TxInterFrameGapShift = 24,
 281         TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
 282
 283         /* Config1 register p.24 */
 284         MSIEnable       = (1 << 5),     /* Enable Message Signaled Interrupt */
 285         PMEnable        = (1 << 0),     /* Power Management Enable */
 286
 287         /* Config2 register p. 25 */
 288         PCI_Clock_66MHz = 0x01,
 289         PCI_Clock_33MHz = 0x00,
 290
 291         /* Config3 register p.25 */
 292         MagicPacket     = (1 << 5),     /* Wake up when receives a Magic Packet */
 293         LinkUp          = (1 << 4),     /* Wake up when the cable connection is re-established */
 294
 295         /* Config5 register p.27 */
 296         BWF             = (1 << 6),     /* Accept Broadcast wakeup frame */
 297         MWF             = (1 << 5),     /* Accept Multicast wakeup frame */
 298         UWF             = (1 << 4),     /* Accept Unicast wakeup frame */
 299         LanWake         = (1 << 1),     /* LanWake enable/disable */
 300         PMEStatus       = (1 << 0),     /* PME status can be reset by PCI RST# */
 301
 302         /* TBICSR p.28 */
 303         TBIReset        = 0x80000000,
 304         TBILoopback     = 0x40000000,
 305         TBINwEnable     = 0x20000000,
 306         TBINwRestart    = 0x10000000,
 307         TBILinkOk       = 0x02000000,
 308         TBINwComplete   = 0x01000000,
 309
 310         /* CPlusCmd p.31 */
 311         PktCntrDisable  = (1 << 7),     // 8168
 312         RxVlan          = (1 << 6),
 313         RxChkSum        = (1 << 5),
 314         PCIDAC          = (1 << 4),
 315         PCIMulRW        = (1 << 3),
 316         INTT_0          = 0x0000,       // 8168
 317         INTT_1          = 0x0001,       // 8168
 318         INTT_2          = 0x0002,       // 8168
 319         INTT_3          = 0x0003,       // 8168
 320
 321         /* rtl8169_PHYstatus */
 322         TBI_Enable      = 0x80,
 323         TxFlowCtrl      = 0x40,
 324         RxFlowCtrl      = 0x20,
 325         _1000bpsF       = 0x10,
 326         _100bps         = 0x08,
 327         _10bps          = 0x04,
 328         LinkStatus      = 0x02,
 329         FullDup         = 0x01,
 330
 331         /* _TBICSRBit */
 332         TBILinkOK       = 0x02000000,
 333
 334         /* DumpCounterCommand */
 335         CounterDump     = 0x8,
 336 };
 337
 338 enum desc_status_bit {
 339         DescOwn         = (1 << 31), /* Descriptor is owned by NIC */
 340         RingEnd         = (1 << 30), /* End of descriptor ring */
 341         FirstFrag       = (1 << 29), /* First segment of a packet */
 342         LastFrag        = (1 << 28), /* Final segment of a packet */
 343
 344         /* Tx private */
 345         LargeSend       = (1 << 27), /* TCP Large Send Offload (TSO) */
 346         MSSShift        = 16,        /* MSS value position */
 347         MSSMask         = 0xfff,     /* MSS value + LargeSend bit: 12 bits */
 348         IPCS            = (1 << 18), /* Calculate IP checksum */
 349         UDPCS           = (1 << 17), /* Calculate UDP/IP checksum */
 350         TCPCS           = (1 << 16), /* Calculate TCP/IP checksum */
 351         TxVlanTag       = (1 << 17), /* Add VLAN tag */
 352
 353         /* Rx private */
 354         PID1            = (1 << 18), /* Protocol ID bit 1/2 */
 355         PID0            = (1 << 17), /* Protocol ID bit 2/2 */
 356
 357 #define RxProtoUDP      (PID1)
 358 #define RxProtoTCP      (PID0)
 359 #define RxProtoIP       (PID1 | PID0)
 360 #define RxProtoMask     RxProtoIP
 361
 362         IPFail          = (1 << 16), /* IP checksum failed */
 363         UDPFail         = (1 << 15), /* UDP/IP checksum failed */
 364         TCPFail         = (1 << 14), /* TCP/IP checksum failed */
 365         RxVlanTag       = (1 << 16), /* VLAN tag available */
 366 };
 367
 368 #define RsvdMask        0x3fffc000
 369
 370 struct TxDesc {
 371         __le32 opts1;
 372         __le32 opts2;
 373         __le64 addr;
 374 };
 375
 376 struct RxDesc {
 377         __le32 opts1;
 378         __le32 opts2;
 379         __le64 addr;
 380 };
 381
 382 struct ring_info {
 383         struct sk_buff  *skb;
 384         u32             len;
 385         u8              __pad[sizeof(void *) - sizeof(u32)];
 386 };
 387
 388 enum features {
 389         RTL_FEATURE_WOL = (1 << 0),
 390         RTL_FEATURE_MSI = (1 << 1),
 391 };
 392
 393 struct rtl8169_private {
 394         void __iomem *mmio_addr;        /* memory map physical address */
 395         struct pci_dev *pci_dev;        /* Index of PCI device */
 396         struct net_device *dev;
 397 #ifdef CONFIG_R8169_NAPI
 398         struct napi_struct napi;
 399 #endif
 400         spinlock_t lock;                /* spin lock flag */
 401         u32 msg_enable;
 402         int chipset;
 403         int mac_version;
 404         u32 cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
 405         u32 cur_tx; /* Index into the Tx descriptor buffer of next Rx pkt. */
 406         u32 dirty_rx;
 407         u32 dirty_tx;
 408         struct TxDesc *TxDescArray;     /* 256-aligned Tx descriptor ring */
 409         struct RxDesc *RxDescArray;     /* 256-aligned Rx descriptor ring */
 410         dma_addr_t TxPhyAddr;
 411         dma_addr_t RxPhyAddr;
 412         struct sk_buff *Rx_skbuff[NUM_RX_DESC]; /* Rx data buffers */
 413         struct ring_info tx_skb[NUM_TX_DESC];   /* Tx data buffers */
 414         unsigned align;
 415         unsigned rx_buf_sz;
 416         struct timer_list timer;
 417         u16 cp_cmd;
 418         u16 intr_event;
 419         u16 napi_event;
 420         u16 intr_mask;
 421         int phy_auto_nego_reg;
 422         int phy_1000_ctrl_reg;
 423 #ifdef CONFIG_R8169_VLAN
 424         struct vlan_group *vlgrp;
 425 #endif
 426         int (*set_speed)(struct net_device *, u8 autoneg, u16 speed, u8 duplex);
 427         void (*get_settings)(struct net_device *, struct ethtool_cmd *);
 428         void (*phy_reset_enable)(void __iomem *);
 429         void (*hw_start)(struct net_device *);
 430         unsigned int (*phy_reset_pending)(void __iomem *);
 431         unsigned int (*link_ok)(void __iomem *);
 432         struct delayed_work task;
 433         unsigned features;
 434 };
 435
 436 MODULE_AUTHOR("Realtek and the Linux r8169 crew <netdev@vger.kernel.org>");
 437 MODULE_DESCRIPTION("RealTek RTL-8169 Gigabit Ethernet driver");
 438 module_param(rx_copybreak, int, 0);
 439 MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
 440 module_param(use_dac, int, 0);
 441 MODULE_PARM_DESC(use_dac, "Enable PCI DAC. Unsafe on 32 bit PCI slot.");
 442 module_param_named(debug, debug.msg_enable, int, 0);
 443 MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
 444 MODULE_LICENSE("GPL");
 445 MODULE_VERSION(RTL8169_VERSION);
 446
 447 static int rtl8169_open(struct net_device *dev);
 448 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev);
 449 static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance);
 450 static int rtl8169_init_ring(struct net_device *dev);
 451 static void rtl_hw_start(struct net_device *dev);
 452 static int rtl8169_close(struct net_device *dev);
 453 static void rtl_set_rx_mode(struct net_device *dev);
 454 static void rtl8169_tx_timeout(struct net_device *dev);
 455 static struct net_device_stats *rtl8169_get_stats(struct net_device *dev);
 456 static int rtl8169_rx_interrupt(struct net_device *, struct rtl8169_private *,
 457                                 void __iomem *, u32 budget);
 458 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu);
 459 static void rtl8169_down(struct net_device *dev);
 460 static void rtl8169_rx_clear(struct rtl8169_private *tp);
 461
 462 #ifdef CONFIG_R8169_NAPI
 463 static int rtl8169_poll(struct napi_struct *napi, int budget);
 464 #endif
 465
 466 static const unsigned int rtl8169_rx_config =
 467         (RX_FIFO_THRESH << RxCfgFIFOShift) | (RX_DMA_BURST << RxCfgDMAShift);
 468
 469 static void mdio_write(void __iomem *ioaddr, int reg_addr, int value)
 470 {
 471         int i;
 472
 473         RTL_W32(PHYAR, 0x80000000 | (reg_addr & 0xFF) << 16 | value);
 474
 475         for (i = 20; i > 0; i--) {
 476                 /*
 477                  * Check if the RTL8169 has completed writing to the specified
 478                  * MII register.
 479                  */
 480                 if (!(RTL_R32(PHYAR) & 0x80000000))
 481                         break;
 482                 udelay(25);
 483         }
 484 }
 485
 486 static int mdio_read(void __iomem *ioaddr, int reg_addr)
 487 {
 488         int i, value = -1;
 489
 490         RTL_W32(PHYAR, 0x0 | (reg_addr & 0xFF) << 16);
 491
 492         for (i = 20; i > 0; i--) {
 493                 /*
 494                  * Check if the RTL8169 has completed retrieving data from
 495                  * the specified MII register.
 496                  */
 497                 if (RTL_R32(PHYAR) & 0x80000000) {
 498                         value = (int) (RTL_R32(PHYAR) & 0xFFFF);
 499                         break;
 500                 }
 501                 udelay(25);
 502         }
 503         return value;
 504 }
 505
 506 static void rtl8169_irq_mask_and_ack(void __iomem *ioaddr)
 507 {
 508         RTL_W16(IntrMask, 0x0000);
 509
 510         RTL_W16(IntrStatus, 0xffff);
 511 }
 512
 513 static void rtl8169_asic_down(void __iomem *ioaddr)
 514 {
 515         RTL_W8(ChipCmd, 0x00);
 516         rtl8169_irq_mask_and_ack(ioaddr);
 517         RTL_R16(CPlusCmd);
 518 }
 519
 520 static unsigned int rtl8169_tbi_reset_pending(void __iomem *ioaddr)
 521 {
 522         return RTL_R32(TBICSR) & TBIReset;
 523 }
 524
 525 static unsigned int rtl8169_xmii_reset_pending(void __iomem *ioaddr)
 526 {
 527         return mdio_read(ioaddr, MII_BMCR) & BMCR_RESET;
 528 }
 529
 530 static unsigned int rtl8169_tbi_link_ok(void __iomem *ioaddr)
 531 {
 532         return RTL_R32(TBICSR) & TBILinkOk;
 533 }
 534
 535 static unsigned int rtl8169_xmii_link_ok(void __iomem *ioaddr)
 536 {
 537         return RTL_R8(PHYstatus) & LinkStatus;
 538 }
 539
 540 static void rtl8169_tbi_reset_enable(void __iomem *ioaddr)
 541 {
 542         RTL_W32(TBICSR, RTL_R32(TBICSR) | TBIReset);
 543 }
 544
 545 static void rtl8169_xmii_reset_enable(void __iomem *ioaddr)
 546 {
 547         unsigned int val;
 548
 549         val = mdio_read(ioaddr, MII_BMCR) | BMCR_RESET;
 550         mdio_write(ioaddr, MII_BMCR, val & 0xffff);
 551 }
 552
 553 static void rtl8169_check_link_status(struct net_device *dev,
 554                                       struct rtl8169_private *tp,
 555                                       void __iomem *ioaddr)
 556 {
 557         unsigned long flags;
 558
 559         spin_lock_irqsave(&tp->lock, flags);
 560         if (tp->link_ok(ioaddr)) {
 561                 netif_carrier_on(dev);
 562                 if (netif_msg_ifup(tp))
 563                         printk(KERN_INFO PFX "%s: link up\n", dev->name);
 564         } else {
 565                 if (netif_msg_ifdown(tp))
 566                         printk(KERN_INFO PFX "%s: link down\n", dev->name);
 567                 netif_carrier_off(dev);
 568         }
 569         spin_unlock_irqrestore(&tp->lock, flags);
 570 }
 571
 572 static void rtl8169_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 573 {
 574         struct rtl8169_private *tp = netdev_priv(dev);
 575         void __iomem *ioaddr = tp->mmio_addr;
 576         u8 options;
 577
 578         wol->wolopts = 0;
 579
 580 #define WAKE_ANY (WAKE_PHY | WAKE_MAGIC | WAKE_UCAST | WAKE_BCAST | WAKE_MCAST)
 581         wol->supported = WAKE_ANY;
 582
 583         spin_lock_irq(&tp->lock);
 584
 585         options = RTL_R8(Config1);
 586         if (!(options & PMEnable))
 587                 goto out_unlock;
 588
 589         options = RTL_R8(Config3);
 590         if (options & LinkUp)
 591                 wol->wolopts |= WAKE_PHY;
 592         if (options & MagicPacket)
 593                 wol->wolopts |= WAKE_MAGIC;
 594
 595         options = RTL_R8(Config5);
 596         if (options & UWF)
 597                 wol->wolopts |= WAKE_UCAST;
 598         if (options & BWF)
 599                 wol->wolopts |= WAKE_BCAST;
 600         if (options & MWF)
 601                 wol->wolopts |= WAKE_MCAST;
 602
 603 out_unlock:
 604         spin_unlock_irq(&tp->lock);
 605 }
 606
 607 static int rtl8169_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 608 {
 609         struct rtl8169_private *tp = netdev_priv(dev);
 610         void __iomem *ioaddr = tp->mmio_addr;
 611         unsigned int i;
 612         static struct {
 613                 u32 opt;
 614                 u16 reg;
 615                 u8  mask;
 616         } cfg[] = {
 617                 { WAKE_ANY,   Config1, PMEnable },
 618                 { WAKE_PHY,   Config3, LinkUp },
 619                 { WAKE_MAGIC, Config3, MagicPacket },
 620                 { WAKE_UCAST, Config5, UWF },
 621                 { WAKE_BCAST, Config5, BWF },
 622                 { WAKE_MCAST, Config5, MWF },
 623                 { WAKE_ANY,   Config5, LanWake }
 624         };
 625
 626         spin_lock_irq(&tp->lock);
 627
 628         RTL_W8(Cfg9346, Cfg9346_Unlock);
 629
 630         for (i = 0; i < ARRAY_SIZE(cfg); i++) {
 631                 u8 options = RTL_R8(cfg[i].reg) & ~cfg[i].mask;
 632                 if (wol->wolopts & cfg[i].opt)
 633                         options |= cfg[i].mask;
 634                 RTL_W8(cfg[i].reg, options);
 635         }
 636
 637         RTL_W8(Cfg9346, Cfg9346_Lock);
 638
 639         if (wol->wolopts)
 640                 tp->features |= RTL_FEATURE_WOL;
 641         else
 642                 tp->features &= ~RTL_FEATURE_WOL;
 643
 644         spin_unlock_irq(&tp->lock);
 645
 646         return 0;
 647 }
 648
 649 static void rtl8169_get_drvinfo(struct net_device *dev,
 650                                 struct ethtool_drvinfo *info)
 651 {
 652         struct rtl8169_private *tp = netdev_priv(dev);
 653
 654         strcpy(info->driver, MODULENAME);
 655         strcpy(info->version, RTL8169_VERSION);
 656         strcpy(info->bus_info, pci_name(tp->pci_dev));
 657 }
 658
 659 static int rtl8169_get_regs_len(struct net_device *dev)
 660 {
 661         return R8169_REGS_SIZE;
 662 }
 663
 664 static int rtl8169_set_speed_tbi(struct net_device *dev,
 665                                  u8 autoneg, u16 speed, u8 duplex)
 666 {
 667         struct rtl8169_private *tp = netdev_priv(dev);
 668         void __iomem *ioaddr = tp->mmio_addr;
 669         int ret = 0;
 670         u32 reg;
 671
 672         reg = RTL_R32(TBICSR);
 673         if ((autoneg == AUTONEG_DISABLE) && (speed == SPEED_1000) &&
 674             (duplex == DUPLEX_FULL)) {
 675                 RTL_W32(TBICSR, reg & ~(TBINwEnable | TBINwRestart));
 676         } else if (autoneg == AUTONEG_ENABLE)
 677                 RTL_W32(TBICSR, reg | TBINwEnable | TBINwRestart);
 678         else {
 679                 if (netif_msg_link(tp)) {
 680                         printk(KERN_WARNING "%s: "
 681                                "incorrect speed setting refused in TBI mode\n",
 682                                dev->name);
 683                 }
 684                 ret = -EOPNOTSUPP;
 685         }
 686
 687         return ret;
 688 }
 689
 690 static int rtl8169_set_speed_xmii(struct net_device *dev,
 691                                   u8 autoneg, u16 speed, u8 duplex)
 692 {
 693         struct rtl8169_private *tp = netdev_priv(dev);
 694         void __iomem *ioaddr = tp->mmio_addr;
 695         int auto_nego, giga_ctrl;
 696
 697         auto_nego = mdio_read(ioaddr, MII_ADVERTISE);
 698         auto_nego &= ~(ADVERTISE_10HALF | ADVERTISE_10FULL |
 699                        ADVERTISE_100HALF | ADVERTISE_100FULL);
 700         giga_ctrl = mdio_read(ioaddr, MII_CTRL1000);
 701         giga_ctrl &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 702
 703         if (autoneg == AUTONEG_ENABLE) {
 704                 auto_nego |= (ADVERTISE_10HALF | ADVERTISE_10FULL |
 705                               ADVERTISE_100HALF | ADVERTISE_100FULL);
 706                 giga_ctrl |= ADVERTISE_1000FULL | ADVERTISE_1000HALF;
 707         } else {
 708                 if (speed == SPEED_10)
 709                         auto_nego |= ADVERTISE_10HALF | ADVERTISE_10FULL;
 710                 else if (speed == SPEED_100)
 711                         auto_nego |= ADVERTISE_100HALF | ADVERTISE_100FULL;
 712                 else if (speed == SPEED_1000)
 713                         giga_ctrl |= ADVERTISE_1000FULL | ADVERTISE_1000HALF;
 714
 715                 if (duplex == DUPLEX_HALF)
 716                         auto_nego &= ~(ADVERTISE_10FULL | ADVERTISE_100FULL);
 717
 718                 if (duplex == DUPLEX_FULL)
 719                         auto_nego &= ~(ADVERTISE_10HALF | ADVERTISE_100HALF);
 720
 721                 /* This tweak comes straight from Realtek's driver. */
 722                 if ((speed == SPEED_100) && (duplex == DUPLEX_HALF) &&
 723                     ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
 724                      (tp->mac_version == RTL_GIGA_MAC_VER_16))) {
 725                         auto_nego = ADVERTISE_100HALF | ADVERTISE_CSMA;
 726                 }
 727         }
 728
 729         /* The 8100e/8101e do Fast Ethernet only. */
 730         if ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
 731             (tp->mac_version == RTL_GIGA_MAC_VER_14) ||
 732             (tp->mac_version == RTL_GIGA_MAC_VER_15) ||
 733             (tp->mac_version == RTL_GIGA_MAC_VER_16)) {
 734                 if ((giga_ctrl & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)) &&
 735                     netif_msg_link(tp)) {
 736                         printk(KERN_INFO "%s: PHY does not support 1000Mbps.\n",
 737                                dev->name);
 738                 }
 739                 giga_ctrl &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 740         }
 741
 742         auto_nego |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 743
 744         if ((tp->mac_version == RTL_GIGA_MAC_VER_12) ||
 745             (tp->mac_version == RTL_GIGA_MAC_VER_17)) {
 746                 /* Vendor specific (0x1f) and reserved (0x0e) MII registers. */
 747                 mdio_write(ioaddr, 0x1f, 0x0000);
 748                 mdio_write(ioaddr, 0x0e, 0x0000);
 749         }
 750
 751         tp->phy_auto_nego_reg = auto_nego;
 752         tp->phy_1000_ctrl_reg = giga_ctrl;
 753
 754         mdio_write(ioaddr, MII_ADVERTISE, auto_nego);
 755         mdio_write(ioaddr, MII_CTRL1000, giga_ctrl);
 756         mdio_write(ioaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
 757         return 0;
 758 }
 759
 760 static int rtl8169_set_speed(struct net_device *dev,
 761                              u8 autoneg, u16 speed, u8 duplex)
 762 {
 763         struct rtl8169_private *tp = netdev_priv(dev);
 764         int ret;
 765
 766         ret = tp->set_speed(dev, autoneg, speed, duplex);
 767
 768         if (netif_running(dev) && (tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL))
 769                 mod_timer(&tp->timer, jiffies + RTL8169_PHY_TIMEOUT);
 770
 771         return ret;
 772 }
 773
 774 static int rtl8169_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 775 {
 776         struct rtl8169_private *tp = netdev_priv(dev);
 777         unsigned long flags;
 778         int ret;
 779
 780         spin_lock_irqsave(&tp->lock, flags);
 781         ret = rtl8169_set_speed(dev, cmd->autoneg, cmd->speed, cmd->duplex);
 782         spin_unlock_irqrestore(&tp->lock, flags);
 783
 784         return ret;
 785 }
 786
 787 static u32 rtl8169_get_rx_csum(struct net_device *dev)
 788 {
 789         struct rtl8169_private *tp = netdev_priv(dev);
 790
 791         return tp->cp_cmd & RxChkSum;
 792 }
 793
 794 static int rtl8169_set_rx_csum(struct net_device *dev, u32 data)
 795 {
 796         struct rtl8169_private *tp = netdev_priv(dev);
 797         void __iomem *ioaddr = tp->mmio_addr;
 798         unsigned long flags;
 799
 800         spin_lock_irqsave(&tp->lock, flags);
 801
 802         if (data)
 803                 tp->cp_cmd |= RxChkSum;
 804         else
 805                 tp->cp_cmd &= ~RxChkSum;
 806
 807         RTL_W16(CPlusCmd, tp->cp_cmd);
 808         RTL_R16(CPlusCmd);
 809
 810         spin_unlock_irqrestore(&tp->lock, flags);
 811
 812         return 0;
 813 }
 814
 815 #ifdef CONFIG_R8169_VLAN
 816
 817 static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
 818                                       struct sk_buff *skb)
 819 {
 820         return (tp->vlgrp && vlan_tx_tag_present(skb)) ?
 821                 TxVlanTag | swab16(vlan_tx_tag_get(skb)) : 0x00;
 822 }
 823
 824 static void rtl8169_vlan_rx_register(struct net_device *dev,
 825                                      struct vlan_group *grp)
 826 {
 827         struct rtl8169_private *tp = netdev_priv(dev);
 828         void __iomem *ioaddr = tp->mmio_addr;
 829         unsigned long flags;
 830
 831         spin_lock_irqsave(&tp->lock, flags);
 832         tp->vlgrp = grp;
 833         if (tp->vlgrp)
 834                 tp->cp_cmd |= RxVlan;
 835         else
 836                 tp->cp_cmd &= ~RxVlan;
 837         RTL_W16(CPlusCmd, tp->cp_cmd);
 838         RTL_R16(CPlusCmd);
 839         spin_unlock_irqrestore(&tp->lock, flags);
 840 }
 841
 842 static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc,
 843                                struct sk_buff *skb)
 844 {
 845         u32 opts2 = le32_to_cpu(desc->opts2);
 846         int ret;
 847
 848         if (tp->vlgrp && (opts2 & RxVlanTag)) {
 849                 rtl8169_rx_hwaccel_skb(skb, tp->vlgrp, swab16(opts2 & 0xffff));
 850                 ret = 0;
 851         } else
 852                 ret = -1;
 853         desc->opts2 = 0;
 854         return ret;
 855 }
 856
 857 #else /* !CONFIG_R8169_VLAN */
 858
 859 static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
 860                                       struct sk_buff *skb)
 861 {
 862         return 0;
 863 }
 864
 865 static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc,
 866                                struct sk_buff *skb)
 867 {
 868         return -1;
 869 }
 870
 871 #endif
 872
 873 static void rtl8169_gset_tbi(struct net_device *dev, struct ethtool_cmd *cmd)
 874 {
 875         struct rtl8169_private *tp = netdev_priv(dev);
 876         void __iomem *ioaddr = tp->mmio_addr;
 877         u32 status;
 878
 879         cmd->supported =
 880                 SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE;
 881         cmd->port = PORT_FIBRE;
 882         cmd->transceiver = XCVR_INTERNAL;
 883
 884         status = RTL_R32(TBICSR);
 885         cmd->advertising = (status & TBINwEnable) ?  ADVERTISED_Autoneg : 0;
 886         cmd->autoneg = !!(status & TBINwEnable);
 887
 888         cmd->speed = SPEED_1000;
 889         cmd->duplex = DUPLEX_FULL; /* Always set */
 890 }
 891
 892 static void rtl8169_gset_xmii(struct net_device *dev, struct ethtool_cmd *cmd)
 893 {
 894         struct rtl8169_private *tp = netdev_priv(dev);
 895         void __iomem *ioaddr = tp->mmio_addr;
 896         u8 status;
 897
 898         cmd->supported = SUPPORTED_10baseT_Half |
 899                          SUPPORTED_10baseT_Full |
 900                          SUPPORTED_100baseT_Half |
 901                          SUPPORTED_100baseT_Full |
 902                          SUPPORTED_1000baseT_Full |
 903                          SUPPORTED_Autoneg |
 904                          SUPPORTED_TP;
 905
 906         cmd->autoneg = 1;
 907         cmd->advertising = ADVERTISED_TP | ADVERTISED_Autoneg;
 908
 909         if (tp->phy_auto_nego_reg & ADVERTISE_10HALF)
 910                 cmd->advertising |= ADVERTISED_10baseT_Half;
 911         if (tp->phy_auto_nego_reg & ADVERTISE_10FULL)
 912                 cmd->advertising |= ADVERTISED_10baseT_Full;
 913         if (tp->phy_auto_nego_reg & ADVERTISE_100HALF)
 914                 cmd->advertising |= ADVERTISED_100baseT_Half;
 915         if (tp->phy_auto_nego_reg & ADVERTISE_100FULL)
 916                 cmd->advertising |= ADVERTISED_100baseT_Full;
 917         if (tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL)
 918                 cmd->advertising |= ADVERTISED_1000baseT_Full;
 919
 920         status = RTL_R8(PHYstatus);
 921
 922         if (status & _1000bpsF)
 923                 cmd->speed = SPEED_1000;
 924         else if (status & _100bps)
 925                 cmd->speed = SPEED_100;
 926         else if (status & _10bps)
 927                 cmd->speed = SPEED_10;
 928
 929         if (status & TxFlowCtrl)
 930                 cmd->advertising |= ADVERTISED_Asym_Pause;
 931         if (status & RxFlowCtrl)
 932                 cmd->advertising |= ADVERTISED_Pause;
 933
 934         cmd->duplex = ((status & _1000bpsF) || (status & FullDup)) ?
 935                       DUPLEX_FULL : DUPLEX_HALF;
 936 }
 937
 938 static int rtl8169_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 939 {
 940         struct rtl8169_private *tp = netdev_priv(dev);
 941         unsigned long flags;
 942
 943         spin_lock_irqsave(&tp->lock, flags);
 944
 945         tp->get_settings(dev, cmd);
 946
 947         spin_unlock_irqrestore(&tp->lock, flags);
 948         return 0;
 949 }
 950
 951 static void rtl8169_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 952                              void *p)
 953 {
 954         struct rtl8169_private *tp = netdev_priv(dev);
 955         unsigned long flags;
 956
 957         if (regs->len > R8169_REGS_SIZE)
 958                 regs->len = R8169_REGS_SIZE;
 959
 960         spin_lock_irqsave(&tp->lock, flags);
 961         memcpy_fromio(p, tp->mmio_addr, regs->len);
 962         spin_unlock_irqrestore(&tp->lock, flags);
 963 }
 964
 965 static u32 rtl8169_get_msglevel(struct net_device *dev)
 966 {
 967         struct rtl8169_private *tp = netdev_priv(dev);
 968
 969         return tp->msg_enable;
 970 }
 971
 972 static void rtl8169_set_msglevel(struct net_device *dev, u32 value)
 973 {
 974         struct rtl8169_private *tp = netdev_priv(dev);
 975
 976         tp->msg_enable = value;
 977 }
 978
 979 static const char rtl8169_gstrings[][ETH_GSTRING_LEN] = {
 980         "tx_packets",
 981         "rx_packets",
 982         "tx_errors",
 983         "rx_errors",
 984         "rx_missed",
 985         "align_errors",
 986         "tx_single_collisions",
 987         "tx_multi_collisions",
 988         "unicast",
 989         "broadcast",
 990         "multicast",
 991         "tx_aborted",
 992         "tx_underrun",
 993 };
 994
 995 struct rtl8169_counters {
 996         __le64  tx_packets;
 997         __le64  rx_packets;
 998         __le64  tx_errors;
 999         __le32  rx_errors;
1000         __le16  rx_missed;
1001         __le16  align_errors;
1002         __le32  tx_one_collision;
1003         __le32  tx_multi_collision;
1004         __le64  rx_unicast;
1005         __le64  rx_broadcast;
1006         __le32  rx_multicast;
1007         __le16  tx_aborted;
1008         __le16  tx_underun;
1009 };
1010
1011 static int rtl8169_get_sset_count(struct net_device *dev, int sset)
1012 {
1013         switch (sset) {
1014         case ETH_SS_STATS:
1015                 return ARRAY_SIZE(rtl8169_gstrings);
1016         default:
1017                 return -EOPNOTSUPP;
1018         }
1019 }
1020
1021 static void rtl8169_get_ethtool_stats(struct net_device *dev,
1022                                       struct ethtool_stats *stats, u64 *data)
1023 {
1024         struct rtl8169_private *tp = netdev_priv(dev);
1025         void __iomem *ioaddr = tp->mmio_addr;
1026         struct rtl8169_counters *counters;
1027         dma_addr_t paddr;
1028         u32 cmd;
1029
1030         ASSERT_RTNL();
1031
1032         counters = pci_alloc_consistent(tp->pci_dev, sizeof(*counters), &paddr);
1033         if (!counters)
1034                 return;
1035
1036         RTL_W32(CounterAddrHigh, (u64)paddr >> 32);
1037         cmd = (u64)paddr & DMA_32BIT_MASK;
1038         RTL_W32(CounterAddrLow, cmd);
1039         RTL_W32(CounterAddrLow, cmd | CounterDump);
1040
1041         while (RTL_R32(CounterAddrLow) & CounterDump) {
1042                 if (msleep_interruptible(1))
1043                         break;
1044         }
1045
1046         RTL_W32(CounterAddrLow, 0);
1047         RTL_W32(CounterAddrHigh, 0);
1048
1049         data[0] = le64_to_cpu(counters->tx_packets);
1050         data[1] = le64_to_cpu(counters->rx_packets);
1051         data[2] = le64_to_cpu(counters->tx_errors);
1052         data[3] = le32_to_cpu(counters->rx_errors);
1053         data[4] = le16_to_cpu(counters->rx_missed);
1054         data[5] = le16_to_cpu(counters->align_errors);
1055         data[6] = le32_to_cpu(counters->tx_one_collision);
1056         data[7] = le32_to_cpu(counters->tx_multi_collision);
1057         data[8] = le64_to_cpu(counters->rx_unicast);
1058         data[9] = le64_to_cpu(counters->rx_broadcast);
1059         data[10] = le32_to_cpu(counters->rx_multicast);
1060         data[11] = le16_to_cpu(counters->tx_aborted);
1061         data[12] = le16_to_cpu(counters->tx_underun);
1062
1063         pci_free_consistent(tp->pci_dev, sizeof(*counters), counters, paddr);
1064 }
1065
1066 static void rtl8169_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1067 {
1068         switch(stringset) {
1069         case ETH_SS_STATS:
1070                 memcpy(data, *rtl8169_gstrings, sizeof(rtl8169_gstrings));
1071                 break;
1072         }
1073 }
1074
1075 static const struct ethtool_ops rtl8169_ethtool_ops = {
1076         .get_drvinfo            = rtl8169_get_drvinfo,
1077         .get_regs_len           = rtl8169_get_regs_len,
1078         .get_link               = ethtool_op_get_link,
1079         .get_settings           = rtl8169_get_settings,
1080         .set_settings           = rtl8169_set_settings,
1081         .get_msglevel           = rtl8169_get_msglevel,
1082         .set_msglevel           = rtl8169_set_msglevel,
1083         .get_rx_csum            = rtl8169_get_rx_csum,
1084         .set_rx_csum            = rtl8169_set_rx_csum,
1085         .set_tx_csum            = ethtool_op_set_tx_csum,
1086         .set_sg                 = ethtool_op_set_sg,
1087         .set_tso                = ethtool_op_set_tso,
1088         .get_regs               = rtl8169_get_regs,
1089         .get_wol                = rtl8169_get_wol,
1090         .set_wol                = rtl8169_set_wol,
1091         .get_strings            = rtl8169_get_strings,
1092         .get_sset_count         = rtl8169_get_sset_count,
1093         .get_ethtool_stats      = rtl8169_get_ethtool_stats,
1094 };
1095
1096 static void rtl8169_write_gmii_reg_bit(void __iomem *ioaddr, int reg,
1097                                        int bitnum, int bitval)
1098 {
1099         int val;
1100
1101         val = mdio_read(ioaddr, reg);
1102         val = (bitval == 1) ?
1103                 val | (bitval << bitnum) :  val & ~(0x0001 << bitnum);
1104         mdio_write(ioaddr, reg, val & 0xffff);
1105 }
1106
1107 static void rtl8169_get_mac_version(struct rtl8169_private *tp,
1108                                     void __iomem *ioaddr)
1109 {
1110         /*
1111          * The driver currently handles the 8168Bf and the 8168Be identically
1112          * but they can be identified more specifically through the test below
1113          * if needed:
1114          *
1115          * (RTL_R32(TxConfig) & 0x700000) == 0x500000 ? 8168Bf : 8168Be
1116          *
1117          * Same thing for the 8101Eb and the 8101Ec:
1118          *
1119          * (RTL_R32(TxConfig) & 0x700000) == 0x200000 ? 8101Eb : 8101Ec
1120          */
1121         const struct {
1122                 u32 mask;
1123                 u32 val;
1124                 int mac_version;
1125         } mac_info[] = {
1126                 /* 8168B family. */
1127                 { 0x7c800000, 0x3c800000,       RTL_GIGA_MAC_VER_18 },
1128                 { 0x7cf00000, 0x3c000000,       RTL_GIGA_MAC_VER_19 },
1129                 { 0x7cf00000, 0x3c200000,       RTL_GIGA_MAC_VER_20 },
1130                 { 0x7c800000, 0x3c000000,       RTL_GIGA_MAC_VER_20 },
1131
1132                 /* 8168B family. */
1133                 { 0x7cf00000, 0x38000000,       RTL_GIGA_MAC_VER_12 },
1134                 { 0x7cf00000, 0x38500000,       RTL_GIGA_MAC_VER_17 },
1135                 { 0x7c800000, 0x38000000,       RTL_GIGA_MAC_VER_17 },
1136                 { 0x7c800000, 0x30000000,       RTL_GIGA_MAC_VER_11 },
1137
1138                 /* 8101 family. */
1139                 { 0x7cf00000, 0x34000000,       RTL_GIGA_MAC_VER_13 },
1140                 { 0x7cf00000, 0x34200000,       RTL_GIGA_MAC_VER_16 },
1141                 { 0x7c800000, 0x34000000,       RTL_GIGA_MAC_VER_16 },
1142                 /* FIXME: where did these entries come from ? -- FR */
1143                 { 0xfc800000, 0x38800000,       RTL_GIGA_MAC_VER_15 },
1144                 { 0xfc800000, 0x30800000,       RTL_GIGA_MAC_VER_14 },
1145
1146                 /* 8110 family. */
1147                 { 0xfc800000, 0x98000000,       RTL_GIGA_MAC_VER_06 },
1148                 { 0xfc800000, 0x18000000,       RTL_GIGA_MAC_VER_05 },
1149                 { 0xfc800000, 0x10000000,       RTL_GIGA_MAC_VER_04 },
1150                 { 0xfc800000, 0x04000000,       RTL_GIGA_MAC_VER_03 },
1151                 { 0xfc800000, 0x00800000,       RTL_GIGA_MAC_VER_02 },
1152                 { 0xfc800000, 0x00000000,       RTL_GIGA_MAC_VER_01 },
1153
1154                 { 0x00000000, 0x00000000,       RTL_GIGA_MAC_VER_01 }   /* Catch-all */
1155         }, *p = mac_info;
1156         u32 reg;
1157
1158         reg = RTL_R32(TxConfig);
1159         while ((reg & p->mask) != p->val)
1160                 p++;
1161         tp->mac_version = p->mac_version;
1162
1163         if (p->mask == 0x00000000) {
1164                 struct pci_dev *pdev = tp->pci_dev;
1165
1166                 dev_info(&pdev->dev, "unknown MAC (%08x)\n", reg);
1167         }
1168 }
1169
1170 static void rtl8169_print_mac_version(struct rtl8169_private *tp)
1171 {
1172         dprintk("mac_version = 0x%02x\n", tp->mac_version);
1173 }
1174
1175 struct phy_reg {
1176         u16 reg;
1177         u16 val;
1178 };
1179
1180 static void rtl_phy_write(void __iomem *ioaddr, struct phy_reg *regs, int len)
1181 {
1182         while (len-- > 0) {
1183                 mdio_write(ioaddr, regs->reg, regs->val);
1184                 regs++;
1185         }
1186 }
1187
1188 static void rtl8169s_hw_phy_config(void __iomem *ioaddr)
1189 {
1190         struct {
1191                 u16 regs[5]; /* Beware of bit-sign propagation */
1192         } phy_magic[5] = { {
1193                 { 0x0000,       //w 4 15 12 0
1194                   0x00a1,       //w 3 15 0 00a1
1195                   0x0008,       //w 2 15 0 0008
1196                   0x1020,       //w 1 15 0 1020
1197                   0x1000 } },{  //w 0 15 0 1000
1198                 { 0x7000,       //w 4 15 12 7
1199                   0xff41,       //w 3 15 0 ff41
1200                   0xde60,       //w 2 15 0 de60
1201                   0x0140,       //w 1 15 0 0140
1202                   0x0077 } },{  //w 0 15 0 0077
1203                 { 0xa000,       //w 4 15 12 a
1204                   0xdf01,       //w 3 15 0 df01
1205                   0xdf20,       //w 2 15 0 df20
1206                   0xff95,       //w 1 15 0 ff95
1207                   0xfa00 } },{  //w 0 15 0 fa00
1208                 { 0xb000,       //w 4 15 12 b
1209                   0xff41,       //w 3 15 0 ff41
1210                   0xde20,       //w 2 15 0 de20
1211                   0x0140,       //w 1 15 0 0140
1212                   0x00bb } },{  //w 0 15 0 00bb
1213                 { 0xf000,       //w 4 15 12 f
1214                   0xdf01,       //w 3 15 0 df01
1215                   0xdf20,       //w 2 15 0 df20
1216                   0xff95,       //w 1 15 0 ff95
1217                   0xbf00 }      //w 0 15 0 bf00
1218                 }
1219         }, *p = phy_magic;
1220         unsigned int i;
1221
1222         mdio_write(ioaddr, 0x1f, 0x0001);               //w 31 2 0 1
1223         mdio_write(ioaddr, 0x15, 0x1000);               //w 21 15 0 1000
1224         mdio_write(ioaddr, 0x18, 0x65c7);               //w 24 15 0 65c7
1225         rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0);   //w 4 11 11 0
1226
1227         for (i = 0; i < ARRAY_SIZE(phy_magic); i++, p++) {
1228                 int val, pos = 4;
1229
1230                 val = (mdio_read(ioaddr, pos) & 0x0fff) | (p->regs[0] & 0xffff);
1231                 mdio_write(ioaddr, pos, val);
1232                 while (--pos >= 0)
1233                         mdio_write(ioaddr, pos, p->regs[4 - pos] & 0xffff);
1234                 rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 1); //w 4 11 11 1
1235                 rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0); //w 4 11 11 0
1236         }
1237         mdio_write(ioaddr, 0x1f, 0x0000); //w 31 2 0 0
1238 }
1239
1240 static void rtl8169sb_hw_phy_config(void __iomem *ioaddr)
1241 {
1242         struct phy_reg phy_reg_init[] = {
1243                 { 0x1f, 0x0002 },
1244                 { 0x01, 0x90d0 },
1245                 { 0x1f, 0x0000 }
1246         };
1247
1248         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1249 }
1250 static void rtl8168b_hw_phy_config(void __iomem *ioaddr)
1251 {
1252         struct phy_reg phy_reg_init[] = {
1253                 { 0x1f, 0x0000 },
1254                 { 0x10, 0xf41b },
1255                 { 0x1f, 0x0000 }
1256         };
1257
1258         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1259 }
1260
1261 static void rtl8168cp_hw_phy_config(void __iomem *ioaddr)
1262 {
1263         struct phy_reg phy_reg_init[] = {
1264                 { 0x1f, 0x0000 },
1265                 { 0x1d, 0x0f00 },
1266                 { 0x1f, 0x0002 },
1267                 { 0x0c, 0x1ec8 },
1268                 { 0x1f, 0x0000 }
1269         };
1270
1271         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1272 }
1273
1274 static void rtl8168c_hw_phy_config(void __iomem *ioaddr)
1275 {
1276         struct phy_reg phy_reg_init[] = {
1277                 { 0x1f, 0x0001 },
1278                 { 0x12, 0x2300 },
1279                 { 0x1f, 0x0002 },
1280                 { 0x00, 0x88d4 },
1281                 { 0x01, 0x82b1 },
1282                 { 0x03, 0x7002 },
1283                 { 0x08, 0x9e30 },
1284                 { 0x09, 0x01f0 },
1285                 { 0x0a, 0x5500 },
1286                 { 0x0c, 0x00c8 },
1287                 { 0x1f, 0x0003 },
1288                 { 0x12, 0xc096 },
1289                 { 0x16, 0x000a },
1290                 { 0x1f, 0x0000 }
1291         };
1292
1293         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1294 }
1295
1296 static void rtl8168cx_hw_phy_config(void __iomem *ioaddr)
1297 {
1298         struct phy_reg phy_reg_init[] = {
1299                 { 0x1f, 0x0000 },
1300                 { 0x12, 0x2300 },
1301                 { 0x1f, 0x0003 },
1302                 { 0x16, 0x0f0a },
1303                 { 0x1f, 0x0000 },
1304                 { 0x1f, 0x0002 },
1305                 { 0x0c, 0x7eb8 },
1306                 { 0x1f, 0x0000 }
1307         };
1308
1309         rtl_phy_write(ioaddr, phy_reg_init, ARRAY_SIZE(phy_reg_init));
1310 }
1311
1312 static void rtl_hw_phy_config(struct net_device *dev)
1313 {
1314         struct rtl8169_private *tp = netdev_priv(dev);
1315         void __iomem *ioaddr = tp->mmio_addr;
1316
1317         rtl8169_print_mac_version(tp);
1318
1319         switch (tp->mac_version) {
1320         case RTL_GIGA_MAC_VER_01:
1321                 break;
1322         case RTL_GIGA_MAC_VER_02:
1323         case RTL_GIGA_MAC_VER_03:
1324                 rtl8169s_hw_phy_config(ioaddr);
1325                 break;
1326         case RTL_GIGA_MAC_VER_04:
1327                 rtl8169sb_hw_phy_config(ioaddr);
1328                 break;
1329         case RTL_GIGA_MAC_VER_11:
1330         case RTL_GIGA_MAC_VER_12:
1331                 break;
1332         case RTL_GIGA_MAC_VER_17:
1333                 rtl8168b_hw_phy_config(ioaddr);
1334                 break;
1335         case RTL_GIGA_MAC_VER_18:
1336                 rtl8168cp_hw_phy_config(ioaddr);
1337                 break;
1338         case RTL_GIGA_MAC_VER_19:
1339                 rtl8168c_hw_phy_config(ioaddr);
1340                 break;
1341         case RTL_GIGA_MAC_VER_20:
1342                 rtl8168cx_hw_phy_config(ioaddr);
1343                 break;
1344         default:
1345                 break;
1346         }
1347 }
1348
1349 static void rtl8169_phy_timer(unsigned long __opaque)
1350 {
1351         struct net_device *dev = (struct net_device *)__opaque;
1352         struct rtl8169_private *tp = netdev_priv(dev);
1353         struct timer_list *timer = &tp->timer;
1354         void __iomem *ioaddr = tp->mmio_addr;
1355         unsigned long timeout = RTL8169_PHY_TIMEOUT;
1356
1357         assert(tp->mac_version > RTL_GIGA_MAC_VER_01);
1358
1359         if (!(tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL))
1360                 return;
1361
1362         spin_lock_irq(&tp->lock);
1363
1364         if (tp->phy_reset_pending(ioaddr)) {
1365                 /*
1366                  * A busy loop could burn quite a few cycles on nowadays CPU.
1367                  * Let's delay the execution of the timer for a few ticks.
1368                  */
1369                 timeout = HZ/10;
1370                 goto out_mod_timer;
1371         }
1372
1373         if (tp->link_ok(ioaddr))
1374                 goto out_unlock;
1375
1376         if (netif_msg_link(tp))
1377                 printk(KERN_WARNING "%s: PHY reset until link up\n", dev->name);
1378
1379         tp->phy_reset_enable(ioaddr);
1380
1381 out_mod_timer:
1382         mod_timer(timer, jiffies + timeout);
1383 out_unlock:
1384         spin_unlock_irq(&tp->lock);
1385 }
1386
1387 static inline void rtl8169_delete_timer(struct net_device *dev)
1388 {
1389         struct rtl8169_private *tp = netdev_priv(dev);
1390         struct timer_list *timer = &tp->timer;
1391
1392         if (tp->mac_version <= RTL_GIGA_MAC_VER_01)
1393                 return;
1394
1395         del_timer_sync(timer);
1396 }
1397
1398 static inline void rtl8169_request_timer(struct net_device *dev)
1399 {
1400         struct rtl8169_private *tp = netdev_priv(dev);
1401         struct timer_list *timer = &tp->timer;
1402
1403         if (tp->mac_version <= RTL_GIGA_MAC_VER_01)
1404                 return;
1405
1406         mod_timer(timer, jiffies + RTL8169_PHY_TIMEOUT);
1407 }
1408
1409 #ifdef CONFIG_NET_POLL_CONTROLLER
1410 /*
1411  * Polling 'interrupt' - used by things like netconsole to send skbs
1412  * without having to re-enable interrupts. It's not called while
1413  * the interrupt routine is executing.
1414  */
1415 static void rtl8169_netpoll(struct net_device *dev)
1416 {
1417         struct rtl8169_private *tp = netdev_priv(dev);
1418         struct pci_dev *pdev = tp->pci_dev;
1419
1420         disable_irq(pdev->irq);
1421         rtl8169_interrupt(pdev->irq, dev);
1422         enable_irq(pdev->irq);
1423 }
1424 #endif
1425
1426 static void rtl8169_release_board(struct pci_dev *pdev, struct net_device *dev,
1427                                   void __iomem *ioaddr)
1428 {
1429         iounmap(ioaddr);
1430         pci_release_regions(pdev);
1431         pci_disable_device(pdev);
1432         free_netdev(dev);
1433 }
1434
1435 static void rtl8169_phy_reset(struct net_device *dev,
1436                               struct rtl8169_private *tp)
1437 {
1438         void __iomem *ioaddr = tp->mmio_addr;
1439         unsigned int i;
1440
1441         tp->phy_reset_enable(ioaddr);
1442         for (i = 0; i < 100; i++) {
1443                 if (!tp->phy_reset_pending(ioaddr))
1444                         return;
1445                 msleep(1);
1446         }
1447         if (netif_msg_link(tp))
1448                 printk(KERN_ERR "%s: PHY reset failed.\n", dev->name);
1449 }
1450
1451 static void rtl8169_init_phy(struct net_device *dev, struct rtl8169_private *tp)
1452 {
1453         void __iomem *ioaddr = tp->mmio_addr;
1454
1455         rtl_hw_phy_config(dev);
1456
1457         dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
1458         RTL_W8(0x82, 0x01);
1459
1460         pci_write_config_byte(tp->pci_dev, PCI_LATENCY_TIMER, 0x40);
1461
1462         if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
1463                 pci_write_config_byte(tp->pci_dev, PCI_CACHE_LINE_SIZE, 0x08);
1464
1465         if (tp->mac_version == RTL_GIGA_MAC_VER_02) {
1466                 dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
1467                 RTL_W8(0x82, 0x01);
1468                 dprintk("Set PHY Reg 0x0bh = 0x00h\n");
1469                 mdio_write(ioaddr, 0x0b, 0x0000); //w 0x0b 15 0 0
1470         }
1471
1472         rtl8169_phy_reset(dev, tp);
1473
1474         /*
1475          * rtl8169_set_speed_xmii takes good care of the Fast Ethernet
1476          * only 8101. Don't panic.
1477          */
1478         rtl8169_set_speed(dev, AUTONEG_ENABLE, SPEED_1000, DUPLEX_FULL);
1479
1480         if ((RTL_R8(PHYstatus) & TBI_Enable) && netif_msg_link(tp))
1481                 printk(KERN_INFO PFX "%s: TBI auto-negotiating\n", dev->name);
1482 }
1483
1484 static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr)
1485 {
1486         void __iomem *ioaddr = tp->mmio_addr;
1487         u32 high;
1488         u32 low;
1489
1490         low  = addr[0] | (addr[1] << 8) | (addr[2] << 16) | (addr[3] << 24);
1491         high = addr[4] | (addr[5] << 8);
1492
1493         spin_lock_irq(&tp->lock);
1494
1495         RTL_W8(Cfg9346, Cfg9346_Unlock);
1496         RTL_W32(MAC0, low);
1497         RTL_W32(MAC4, high);
1498         RTL_W8(Cfg9346, Cfg9346_Lock);
1499
1500         spin_unlock_irq(&tp->lock);
1501 }
1502
1503 static int rtl_set_mac_address(struct net_device *dev, void *p)
1504 {
1505         struct rtl8169_private *tp = netdev_priv(dev);
1506         struct sockaddr *addr = p;
1507
1508         if (!is_valid_ether_addr(addr->sa_data))
1509                 return -EADDRNOTAVAIL;
1510
1511         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1512
1513         rtl_rar_set(tp, dev->dev_addr);
1514
1515         return 0;
1516 }
1517
1518 static int rtl8169_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1519 {
1520         struct rtl8169_private *tp = netdev_priv(dev);
1521         struct mii_ioctl_data *data = if_mii(ifr);
1522
1523         if (!netif_running(dev))
1524                 return -ENODEV;
1525
1526         switch (cmd) {
1527         case SIOCGMIIPHY:
1528                 data->phy_id = 32; /* Internal PHY */
1529                 return 0;
1530
1531         case SIOCGMIIREG:
1532                 data->val_out = mdio_read(tp->mmio_addr, data->reg_num & 0x1f);
1533                 return 0;
1534
1535         case SIOCSMIIREG:
1536                 if (!capable(CAP_NET_ADMIN))
1537                         return -EPERM;
1538                 mdio_write(tp->mmio_addr, data->reg_num & 0x1f, data->val_in);
1539                 return 0;
1540         }
1541         return -EOPNOTSUPP;
1542 }
1543
1544 static const struct rtl_cfg_info {
1545         void (*hw_start)(struct net_device *);
1546         unsigned int region;
1547         unsigned int align;
1548         u16 intr_event;
1549         u16 napi_event;
1550         unsigned msi;
1551 } rtl_cfg_infos [] = {
1552         [RTL_CFG_0] = {
1553                 .hw_start       = rtl_hw_start_8169,
1554                 .region         = 1,
1555                 .align          = 0,
1556                 .intr_event     = SYSErr | LinkChg | RxOverflow |
1557                                   RxFIFOOver | TxErr | TxOK | RxOK | RxErr,
1558                 .napi_event     = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow,
1559                 .msi            = 0
1560         },
1561         [RTL_CFG_1] = {
1562                 .hw_start       = rtl_hw_start_8168,
1563                 .region         = 2,
1564                 .align          = 8,
1565                 .intr_event     = SYSErr | LinkChg | RxOverflow |
1566                                   TxErr | TxOK | RxOK | RxErr,
1567                 .napi_event     = TxErr | TxOK | RxOK | RxOverflow,
1568                 .msi            = RTL_FEATURE_MSI
1569         },
1570         [RTL_CFG_2] = {
1571                 .hw_start       = rtl_hw_start_8101,
1572                 .region         = 2,
1573                 .align          = 8,
1574                 .intr_event     = SYSErr | LinkChg | RxOverflow | PCSTimeout |
1575                                   RxFIFOOver | TxErr | TxOK | RxOK | RxErr,
1576                 .napi_event     = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow,
1577                 .msi            = RTL_FEATURE_MSI
1578         }
1579 };
1580
1581 /* Cfg9346_Unlock assumed. */
1582 static unsigned rtl_try_msi(struct pci_dev *pdev, void __iomem *ioaddr,
1583                             const struct rtl_cfg_info *cfg)
1584 {
1585         unsigned msi = 0;
1586         u8 cfg2;
1587
1588         cfg2 = RTL_R8(Config2) & ~MSIEnable;
1589         if (cfg->msi) {
1590                 if (pci_enable_msi(pdev)) {
1591                         dev_info(&pdev->dev, "no MSI. Back to INTx.\n");
1592                 } else {
1593                         cfg2 |= MSIEnable;
1594                         msi = RTL_FEATURE_MSI;
1595                 }
1596         }
1597         RTL_W8(Config2, cfg2);
1598         return msi;
1599 }
1600
1601 static void rtl_disable_msi(struct pci_dev *pdev, struct rtl8169_private *tp)
1602 {
1603         if (tp->features & RTL_FEATURE_MSI) {
1604                 pci_disable_msi(pdev);
1605                 tp->features &= ~RTL_FEATURE_MSI;
1606         }
1607 }
1608
1609 static int __devinit
1610 rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1611 {
1612         const struct rtl_cfg_info *cfg = rtl_cfg_infos + ent->driver_data;
1613         const unsigned int region = cfg->region;
1614         struct rtl8169_private *tp;
1615         struct net_device *dev;
1616         void __iomem *ioaddr;
1617         unsigned int i;
1618         int rc;
1619
1620         if (netif_msg_drv(&debug)) {
1621                 printk(KERN_INFO "%s Gigabit Ethernet driver %s loaded\n",
1622                        MODULENAME, RTL8169_VERSION);
1623         }
1624
1625         dev = alloc_etherdev(sizeof (*tp));
1626         if (!dev) {
1627                 if (netif_msg_drv(&debug))
1628                         dev_err(&pdev->dev, "unable to alloc new ethernet\n");
1629                 rc = -ENOMEM;
1630                 goto out;
1631         }
1632
1633         SET_NETDEV_DEV(dev, &pdev->dev);
1634         tp = netdev_priv(dev);
1635         tp->dev = dev;
1636         tp->msg_enable = netif_msg_init(debug.msg_enable, R8169_MSG_DEFAULT);
1637
1638         /* enable device (incl. PCI PM wakeup and hotplug setup) */
1639         rc = pci_enable_device(pdev);
1640         if (rc < 0) {
1641                 if (netif_msg_probe(tp))
1642                         dev_err(&pdev->dev, "enable failure\n");
1643                 goto err_out_free_dev_1;
1644         }
1645
1646         rc = pci_set_mwi(pdev);
1647         if (rc < 0)
1648                 goto err_out_disable_2;
1649
1650         /* make sure PCI base addr 1 is MMIO */
1651         if (!(pci_resource_flags(pdev, region) & IORESOURCE_MEM)) {
1652                 if (netif_msg_probe(tp)) {
1653                         dev_err(&pdev->dev,
1654                                 "region #%d not an MMIO resource, aborting\n",
1655                                 region);
1656                 }
1657                 rc = -ENODEV;
1658                 goto err_out_mwi_3;
1659         }
1660
1661         /* check for weird/broken PCI region reporting */
1662         if (pci_resource_len(pdev, region) < R8169_REGS_SIZE) {
1663                 if (netif_msg_probe(tp)) {
1664                         dev_err(&pdev->dev,
1665                                 "Invalid PCI region size(s), aborting\n");
1666                 }
1667                 rc = -ENODEV;
1668                 goto err_out_mwi_3;
1669         }
1670
1671         rc = pci_request_regions(pdev, MODULENAME);
1672         if (rc < 0) {
1673                 if (netif_msg_probe(tp))
1674                         dev_err(&pdev->dev, "could not request regions.\n");
1675                 goto err_out_mwi_3;
1676         }
1677
1678         tp->cp_cmd = PCIMulRW | RxChkSum;
1679
1680         if ((sizeof(dma_addr_t) > 4) &&
1681             !pci_set_dma_mask(pdev, DMA_64BIT_MASK) && use_dac) {
1682                 tp->cp_cmd |= PCIDAC;
1683                 dev->features |= NETIF_F_HIGHDMA;
1684         } else {
1685                 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1686                 if (rc < 0) {
1687                         if (netif_msg_probe(tp)) {
1688                                 dev_err(&pdev->dev,
1689                                         "DMA configuration failed.\n");
1690                         }
1691                         goto err_out_free_res_4;
1692                 }
1693         }
1694
1695         pci_set_master(pdev);
1696
1697         /* ioremap MMIO region */
1698         ioaddr = ioremap(pci_resource_start(pdev, region), R8169_REGS_SIZE);
1699         if (!ioaddr) {
1700                 if (netif_msg_probe(tp))
1701                         dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
1702                 rc = -EIO;
1703                 goto err_out_free_res_4;
1704         }
1705
1706         /* Unneeded ? Don't mess with Mrs. Murphy. */
1707         rtl8169_irq_mask_and_ack(ioaddr);
1708
1709         /* Soft reset the chip. */
1710         RTL_W8(ChipCmd, CmdReset);
1711
1712         /* Check that the chip has finished the reset. */
1713         for (i = 0; i < 100; i++) {
1714                 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
1715                         break;
1716                 msleep_interruptible(1);
1717         }
1718
1719         /* Identify chip attached to board */
1720         rtl8169_get_mac_version(tp, ioaddr);
1721
1722         rtl8169_print_mac_version(tp);
1723
1724         for (i = ARRAY_SIZE(rtl_chip_info) - 1; i >= 0; i--) {
1725                 if (tp->mac_version == rtl_chip_info[i].mac_version)
1726                         break;
1727         }
1728         if (i < 0) {
1729                 /* Unknown chip: assume array element #0, original RTL-8169 */
1730                 if (netif_msg_probe(tp)) {
1731                         dev_printk(KERN_DEBUG, &pdev->dev,
1732                                 "unknown chip version, assuming %s\n",
1733                                 rtl_chip_info[0].name);
1734                 }
1735                 i++;
1736         }
1737         tp->chipset = i;
1738
1739         RTL_W8(Cfg9346, Cfg9346_Unlock);
1740         RTL_W8(Config1, RTL_R8(Config1) | PMEnable);
1741         RTL_W8(Config5, RTL_R8(Config5) & PMEStatus);
1742         tp->features |= rtl_try_msi(pdev, ioaddr, cfg);
1743         RTL_W8(Cfg9346, Cfg9346_Lock);
1744
1745         if ((tp->mac_version <= RTL_GIGA_MAC_VER_06) &&
1746             (RTL_R8(PHYstatus) & TBI_Enable)) {
1747                 tp->set_speed = rtl8169_set_speed_tbi;
1748                 tp->get_settings = rtl8169_gset_tbi;
1749                 tp->phy_reset_enable = rtl8169_tbi_reset_enable;
1750                 tp->phy_reset_pending = rtl8169_tbi_reset_pending;
1751                 tp->link_ok = rtl8169_tbi_link_ok;
1752
1753                 tp->phy_1000_ctrl_reg = ADVERTISE_1000FULL; /* Implied by TBI */
1754         } else {
1755                 tp->set_speed = rtl8169_set_speed_xmii;
1756                 tp->get_settings = rtl8169_gset_xmii;
1757                 tp->phy_reset_enable = rtl8169_xmii_reset_enable;
1758                 tp->phy_reset_pending = rtl8169_xmii_reset_pending;
1759                 tp->link_ok = rtl8169_xmii_link_ok;
1760
1761                 dev->do_ioctl = rtl8169_ioctl;
1762         }
1763
1764         /* Get MAC address.  FIXME: read EEPROM */
1765         for (i = 0; i < MAC_ADDR_LEN; i++)
1766                 dev->dev_addr[i] = RTL_R8(MAC0 + i);
1767         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1768
1769         dev->open = rtl8169_open;
1770         dev->hard_start_xmit = rtl8169_start_xmit;
1771         dev->get_stats = rtl8169_get_stats;
1772         SET_ETHTOOL_OPS(dev, &rtl8169_ethtool_ops);
1773         dev->stop = rtl8169_close;
1774         dev->tx_timeout = rtl8169_tx_timeout;
1775         dev->set_multicast_list = rtl_set_rx_mode;
1776         dev->watchdog_timeo = RTL8169_TX_TIMEOUT;
1777         dev->irq = pdev->irq;
1778         dev->base_addr = (unsigned long) ioaddr;
1779         dev->change_mtu = rtl8169_change_mtu;
1780         dev->set_mac_address = rtl_set_mac_address;
1781
1782 #ifdef CONFIG_R8169_NAPI
1783         netif_napi_add(dev, &tp->napi, rtl8169_poll, R8169_NAPI_WEIGHT);
1784 #endif
1785
1786 #ifdef CONFIG_R8169_VLAN
1787         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1788         dev->vlan_rx_register = rtl8169_vlan_rx_register;
1789 #endif
1790
1791 #ifdef CONFIG_NET_POLL_CONTROLLER
1792         dev->poll_controller = rtl8169_netpoll;
1793 #endif
1794
1795         tp->intr_mask = 0xffff;
1796         tp->pci_dev = pdev;
1797         tp->mmio_addr = ioaddr;
1798         tp->align = cfg->align;
1799         tp->hw_start = cfg->hw_start;
1800         tp->intr_event = cfg->intr_event;
1801         tp->napi_event = cfg->napi_event;
1802
1803         init_timer(&tp->timer);
1804         tp->timer.data = (unsigned long) dev;
1805         tp->timer.function = rtl8169_phy_timer;
1806
1807         spin_lock_init(&tp->lock);
1808
1809         rc = register_netdev(dev);
1810         if (rc < 0)
1811                 goto err_out_msi_5;
1812
1813         pci_set_drvdata(pdev, dev);
1814
1815         if (netif_msg_probe(tp)) {
1816                 u32 xid = RTL_R32(TxConfig) & 0x7cf0f8ff;
1817
1818                 printk(KERN_INFO "%s: %s at 0x%lx, "
1819                        "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
1820                        "XID %08x IRQ %d\n",
1821                        dev->name,
1822                        rtl_chip_info[tp->chipset].name,
1823                        dev->base_addr,
1824                        dev->dev_addr[0], dev->dev_addr[1],
1825                        dev->dev_addr[2], dev->dev_addr[3],
1826                        dev->dev_addr[4], dev->dev_addr[5], xid, dev->irq);
1827         }
1828
1829         rtl8169_init_phy(dev, tp);
1830
1831 out:
1832         return rc;
1833
1834 err_out_msi_5:
1835         rtl_disable_msi(pdev, tp);
1836         iounmap(ioaddr);
1837 err_out_free_res_4:
1838         pci_release_regions(pdev);
1839 err_out_mwi_3:
1840         pci_clear_mwi(pdev);
1841 err_out_disable_2:
1842         pci_disable_device(pdev);
1843 err_out_free_dev_1:
1844         free_netdev(dev);
1845         goto out;
1846 }
1847
1848 static void __devexit rtl8169_remove_one(struct pci_dev *pdev)
1849 {
1850         struct net_device *dev = pci_get_drvdata(pdev);
1851         struct rtl8169_private *tp = netdev_priv(dev);
1852
1853         flush_scheduled_work();
1854
1855         unregister_netdev(dev);
1856         rtl_disable_msi(pdev, tp);
1857         rtl8169_release_board(pdev, dev, tp->mmio_addr);
1858         pci_set_drvdata(pdev, NULL);
1859 }
1860
1861 static void rtl8169_set_rxbufsize(struct rtl8169_private *tp,
1862                                   struct net_device *dev)
1863 {
1864         unsigned int mtu = dev->mtu;
1865
1866         tp->rx_buf_sz = (mtu > RX_BUF_SIZE) ? mtu + ETH_HLEN + 8 : RX_BUF_SIZE;
1867 }
1868
1869 static int rtl8169_open(struct net_device *dev)
1870 {
1871         struct rtl8169_private *tp = netdev_priv(dev);
1872         struct pci_dev *pdev = tp->pci_dev;
1873         int retval = -ENOMEM;
1874
1875
1876         rtl8169_set_rxbufsize(tp, dev);
1877
1878         /*
1879          * Rx and Tx desscriptors needs 256 bytes alignment.
1880          * pci_alloc_consistent provides more.
1881          */
1882         tp->TxDescArray = pci_alloc_consistent(pdev, R8169_TX_RING_BYTES,
1883                                                &tp->TxPhyAddr);
1884         if (!tp->TxDescArray)
1885                 goto out;
1886
1887         tp->RxDescArray = pci_alloc_consistent(pdev, R8169_RX_RING_BYTES,
1888                                                &tp->RxPhyAddr);
1889         if (!tp->RxDescArray)
1890                 goto err_free_tx_0;
1891
1892         retval = rtl8169_init_ring(dev);
1893         if (retval < 0)
1894                 goto err_free_rx_1;
1895
1896         INIT_DELAYED_WORK(&tp->task, NULL);
1897
1898         smp_mb();
1899
1900         retval = request_irq(dev->irq, rtl8169_interrupt,
1901                              (tp->features & RTL_FEATURE_MSI) ? 0 : IRQF_SHARED,
1902                              dev->name, dev);
1903         if (retval < 0)
1904                 goto err_release_ring_2;
1905
1906 #ifdef CONFIG_R8169_NAPI
1907         napi_enable(&tp->napi);
1908 #endif
1909
1910         rtl_hw_start(dev);
1911
1912         rtl8169_request_timer(dev);
1913
1914         rtl8169_check_link_status(dev, tp, tp->mmio_addr);
1915 out:
1916         return retval;
1917
1918 err_release_ring_2:
1919         rtl8169_rx_clear(tp);
1920 err_free_rx_1:
1921         pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
1922                             tp->RxPhyAddr);
1923 err_free_tx_0:
1924         pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
1925                             tp->TxPhyAddr);
1926         goto out;
1927 }
1928
1929 static void rtl8169_hw_reset(void __iomem *ioaddr)
1930 {
1931         /* Disable interrupts */
1932         rtl8169_irq_mask_and_ack(ioaddr);
1933
1934         /* Reset the chipset */
1935         RTL_W8(ChipCmd, CmdReset);
1936
1937         /* PCI commit */
1938         RTL_R8(ChipCmd);
1939 }
1940
1941 static void rtl_set_rx_tx_config_registers(struct rtl8169_private *tp)
1942 {
1943         void __iomem *ioaddr = tp->mmio_addr;
1944         u32 cfg = rtl8169_rx_config;
1945
1946         cfg |= (RTL_R32(RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1947         RTL_W32(RxConfig, cfg);
1948
1949         /* Set DMA burst size and Interframe Gap Time */
1950         RTL_W32(TxConfig, (TX_DMA_BURST << TxDMAShift) |
1951                 (InterFrameGap << TxInterFrameGapShift));
1952 }
1953
1954 static void rtl_hw_start(struct net_device *dev)
1955 {
1956         struct rtl8169_private *tp = netdev_priv(dev);
1957         void __iomem *ioaddr = tp->mmio_addr;
1958         unsigned int i;
1959
1960         /* Soft reset the chip. */
1961         RTL_W8(ChipCmd, CmdReset);
1962
1963         /* Check that the chip has finished the reset. */
1964         for (i = 0; i < 100; i++) {
1965                 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
1966                         break;
1967                 msleep_interruptible(1);
1968         }
1969
1970         tp->hw_start(dev);
1971
1972         netif_start_queue(dev);
1973 }
1974
1975
1976 static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp,
1977                                          void __iomem *ioaddr)
1978 {
1979         /*
1980          * Magic spell: some iop3xx ARM board needs the TxDescAddrHigh
1981          * register to be written before TxDescAddrLow to work.
1982          * Switching from MMIO to I/O access fixes the issue as well.
1983          */
1984         RTL_W32(TxDescStartAddrHigh, ((u64) tp->TxPhyAddr) >> 32);
1985         RTL_W32(TxDescStartAddrLow, ((u64) tp->TxPhyAddr) & DMA_32BIT_MASK);
1986         RTL_W32(RxDescAddrHigh, ((u64) tp->RxPhyAddr) >> 32);
1987         RTL_W32(RxDescAddrLow, ((u64) tp->RxPhyAddr) & DMA_32BIT_MASK);
1988 }
1989
1990 static u16 rtl_rw_cpluscmd(void __iomem *ioaddr)
1991 {
1992         u16 cmd;
1993
1994         cmd = RTL_R16(CPlusCmd);
1995         RTL_W16(CPlusCmd, cmd);
1996         return cmd;
1997 }
1998
1999 static void rtl_set_rx_max_size(void __iomem *ioaddr)
2000 {
2001         /* Low hurts. Let's disable the filtering. */
2002         RTL_W16(RxMaxSize, 16383);
2003 }
2004
2005 static void rtl8169_set_magic_reg(void __iomem *ioaddr, unsigned mac_version)
2006 {
2007         struct {
2008                 u32 mac_version;
2009                 u32 clk;
2010                 u32 val;
2011         } cfg2_info [] = {
2012                 { RTL_GIGA_MAC_VER_05, PCI_Clock_33MHz, 0x000fff00 }, // 8110SCd
2013                 { RTL_GIGA_MAC_VER_05, PCI_Clock_66MHz, 0x000fffff },
2014                 { RTL_GIGA_MAC_VER_06, PCI_Clock_33MHz, 0x00ffff00 }, // 8110SCe
2015                 { RTL_GIGA_MAC_VER_06, PCI_Clock_66MHz, 0x00ffffff }
2016         }, *p = cfg2_info;
2017         unsigned int i;
2018         u32 clk;
2019
2020         clk = RTL_R8(Config2) & PCI_Clock_66MHz;
2021         for (i = 0; i < ARRAY_SIZE(cfg2_info); i++) {
2022                 if ((p->mac_version == mac_version) && (p->clk == clk)) {
2023                         RTL_W32(0x7c, p->val);
2024                         break;
2025                 }
2026         }
2027 }
2028
2029 static void rtl_hw_start_8169(struct net_device *dev)
2030 {
2031         struct rtl8169_private *tp = netdev_priv(dev);
2032         void __iomem *ioaddr = tp->mmio_addr;
2033         struct pci_dev *pdev = tp->pci_dev;
2034
2035         if (tp->mac_version == RTL_GIGA_MAC_VER_05) {
2036                 RTL_W16(CPlusCmd, RTL_R16(CPlusCmd) | PCIMulRW);
2037                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 0x08);
2038         }
2039
2040         RTL_W8(Cfg9346, Cfg9346_Unlock);
2041         if ((tp->mac_version == RTL_GIGA_MAC_VER_01) ||
2042             (tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2043             (tp->mac_version == RTL_GIGA_MAC_VER_03) ||
2044             (tp->mac_version == RTL_GIGA_MAC_VER_04))
2045                 RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2046
2047         RTL_W8(EarlyTxThres, EarlyTxThld);
2048
2049         rtl_set_rx_max_size(ioaddr);
2050
2051         if ((tp->mac_version == RTL_GIGA_MAC_VER_01) ||
2052             (tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2053             (tp->mac_version == RTL_GIGA_MAC_VER_03) ||
2054             (tp->mac_version == RTL_GIGA_MAC_VER_04))
2055                 rtl_set_rx_tx_config_registers(tp);
2056
2057         tp->cp_cmd |= rtl_rw_cpluscmd(ioaddr) | PCIMulRW;
2058
2059         if ((tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2060             (tp->mac_version == RTL_GIGA_MAC_VER_03)) {
2061                 dprintk("Set MAC Reg C+CR Offset 0xE0. "
2062                         "Bit-3 and bit-14 MUST be 1\n");
2063                 tp->cp_cmd |= (1 << 14);
2064         }
2065
2066         RTL_W16(CPlusCmd, tp->cp_cmd);
2067
2068         rtl8169_set_magic_reg(ioaddr, tp->mac_version);
2069
2070         /*
2071          * Undocumented corner. Supposedly:
2072          * (TxTimer << 12) | (TxPackets << 8) | (RxTimer << 4) | RxPackets
2073          */
2074         RTL_W16(IntrMitigate, 0x0000);
2075
2076         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2077
2078         if ((tp->mac_version != RTL_GIGA_MAC_VER_01) &&
2079             (tp->mac_version != RTL_GIGA_MAC_VER_02) &&
2080             (tp->mac_version != RTL_GIGA_MAC_VER_03) &&
2081             (tp->mac_version != RTL_GIGA_MAC_VER_04)) {
2082                 RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2083                 rtl_set_rx_tx_config_registers(tp);
2084         }
2085
2086         RTL_W8(Cfg9346, Cfg9346_Lock);
2087
2088         /* Initially a 10 us delay. Turned it into a PCI commit. - FR */
2089         RTL_R8(IntrMask);
2090
2091         RTL_W32(RxMissed, 0);
2092
2093         rtl_set_rx_mode(dev);
2094
2095         /* no early-rx interrupts */
2096         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
2097
2098         /* Enable all known interrupts by setting the interrupt mask. */
2099         RTL_W16(IntrMask, tp->intr_event);
2100 }
2101
2102 static void rtl_hw_start_8168(struct net_device *dev)
2103 {
2104         struct rtl8169_private *tp = netdev_priv(dev);
2105         void __iomem *ioaddr = tp->mmio_addr;
2106         struct pci_dev *pdev = tp->pci_dev;
2107         u8 ctl;
2108
2109         RTL_W8(Cfg9346, Cfg9346_Unlock);
2110
2111         RTL_W8(EarlyTxThres, EarlyTxThld);
2112
2113         rtl_set_rx_max_size(ioaddr);
2114
2115         rtl_set_rx_tx_config_registers(tp);
2116
2117         tp->cp_cmd |= RTL_R16(CPlusCmd) | PktCntrDisable | INTT_1;
2118
2119         RTL_W16(CPlusCmd, tp->cp_cmd);
2120
2121         /* Tx performance tweak. */
2122         pci_read_config_byte(pdev, 0x69, &ctl);
2123         ctl = (ctl & ~0x70) | 0x50;
2124         pci_write_config_byte(pdev, 0x69, ctl);
2125
2126         RTL_W16(IntrMitigate, 0x5151);
2127
2128         /* Work around for RxFIFO overflow. */
2129         if (tp->mac_version == RTL_GIGA_MAC_VER_11) {
2130                 tp->intr_event |= RxFIFOOver | PCSTimeout;
2131                 tp->intr_event &= ~RxOverflow;
2132         }
2133
2134         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2135
2136         RTL_W8(Cfg9346, Cfg9346_Lock);
2137
2138         RTL_R8(IntrMask);
2139
2140         RTL_W32(RxMissed, 0);
2141
2142         rtl_set_rx_mode(dev);
2143
2144         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2145
2146         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
2147
2148         RTL_W16(IntrMask, tp->intr_event);
2149 }
2150
2151 static void rtl_hw_start_8101(struct net_device *dev)
2152 {
2153         struct rtl8169_private *tp = netdev_priv(dev);
2154         void __iomem *ioaddr = tp->mmio_addr;
2155         struct pci_dev *pdev = tp->pci_dev;
2156
2157         if ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
2158             (tp->mac_version == RTL_GIGA_MAC_VER_16)) {
2159                 pci_write_config_word(pdev, 0x68, 0x00);
2160                 pci_write_config_word(pdev, 0x69, 0x08);
2161         }
2162
2163         RTL_W8(Cfg9346, Cfg9346_Unlock);
2164
2165         RTL_W8(EarlyTxThres, EarlyTxThld);
2166
2167         rtl_set_rx_max_size(ioaddr);
2168
2169         tp->cp_cmd |= rtl_rw_cpluscmd(ioaddr) | PCIMulRW;
2170
2171         RTL_W16(CPlusCmd, tp->cp_cmd);
2172
2173         RTL_W16(IntrMitigate, 0x0000);
2174
2175         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2176
2177         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2178         rtl_set_rx_tx_config_registers(tp);
2179
2180         RTL_W8(Cfg9346, Cfg9346_Lock);
2181
2182         RTL_R8(IntrMask);
2183
2184         RTL_W32(RxMissed, 0);
2185
2186         rtl_set_rx_mode(dev);
2187
2188         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2189
2190         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xf000);
2191
2192         RTL_W16(IntrMask, tp->intr_event);
2193 }
2194
2195 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
2196 {
2197         struct rtl8169_private *tp = netdev_priv(dev);
2198         int ret = 0;
2199
2200         if (new_mtu < ETH_ZLEN || new_mtu > SafeMtu)
2201                 return -EINVAL;
2202
2203         dev->mtu = new_mtu;
2204
2205         if (!netif_running(dev))
2206                 goto out;
2207
2208         rtl8169_down(dev);
2209
2210         rtl8169_set_rxbufsize(tp, dev);
2211
2212         ret = rtl8169_init_ring(dev);
2213         if (ret < 0)
2214                 goto out;
2215
2216 #ifdef CONFIG_R8169_NAPI
2217         napi_enable(&tp->napi);
2218 #endif
2219
2220         rtl_hw_start(dev);
2221
2222         rtl8169_request_timer(dev);
2223
2224 out:
2225         return ret;
2226 }
2227
2228 static inline void rtl8169_make_unusable_by_asic(struct RxDesc *desc)
2229 {
2230         desc->addr = 0x0badbadbadbadbadull;
2231         desc->opts1 &= ~cpu_to_le32(DescOwn | RsvdMask);
2232 }
2233
2234 static void rtl8169_free_rx_skb(struct rtl8169_private *tp,
2235                                 struct sk_buff **sk_buff, struct RxDesc *desc)
2236 {
2237         struct pci_dev *pdev = tp->pci_dev;
2238
2239         pci_unmap_single(pdev, le64_to_cpu(desc->addr), tp->rx_buf_sz,
2240                          PCI_DMA_FROMDEVICE);
2241         dev_kfree_skb(*sk_buff);
2242         *sk_buff = NULL;
2243         rtl8169_make_unusable_by_asic(desc);
2244 }
2245
2246 static inline void rtl8169_mark_to_asic(struct RxDesc *desc, u32 rx_buf_sz)
2247 {
2248         u32 eor = le32_to_cpu(desc->opts1) & RingEnd;
2249
2250         desc->opts1 = cpu_to_le32(DescOwn | eor | rx_buf_sz);
2251 }
2252
2253 static inline void rtl8169_map_to_asic(struct RxDesc *desc, dma_addr_t mapping,
2254                                        u32 rx_buf_sz)
2255 {
2256         desc->addr = cpu_to_le64(mapping);
2257         wmb();
2258         rtl8169_mark_to_asic(desc, rx_buf_sz);
2259 }
2260
2261 static struct sk_buff *rtl8169_alloc_rx_skb(struct pci_dev *pdev,
2262                                             struct net_device *dev,
2263                                             struct RxDesc *desc, int rx_buf_sz,
2264                                             unsigned int align)
2265 {
2266         struct sk_buff *skb;
2267         dma_addr_t mapping;
2268         unsigned int pad;
2269
2270         pad = align ? align : NET_IP_ALIGN;
2271
2272         skb = netdev_alloc_skb(dev, rx_buf_sz + pad);
2273         if (!skb)
2274                 goto err_out;
2275
2276         skb_reserve(skb, align ? ((pad - 1) & (unsigned long)skb->data) : pad);
2277
2278         mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
2279                                  PCI_DMA_FROMDEVICE);
2280
2281         rtl8169_map_to_asic(desc, mapping, rx_buf_sz);
2282 out:
2283         return skb;
2284
2285 err_out:
2286         rtl8169_make_unusable_by_asic(desc);
2287         goto out;
2288 }
2289
2290 static void rtl8169_rx_clear(struct rtl8169_private *tp)
2291 {
2292         unsigned int i;
2293
2294         for (i = 0; i < NUM_RX_DESC; i++) {
2295                 if (tp->Rx_skbuff[i]) {
2296                         rtl8169_free_rx_skb(tp, tp->Rx_skbuff + i,
2297                                             tp->RxDescArray + i);
2298                 }
2299         }
2300 }
2301
2302 static u32 rtl8169_rx_fill(struct rtl8169_private *tp, struct net_device *dev,
2303                            u32 start, u32 end)
2304 {
2305         u32 cur;
2306
2307         for (cur = start; end - cur != 0; cur++) {
2308                 struct sk_buff *skb;
2309                 unsigned int i = cur % NUM_RX_DESC;
2310
2311                 WARN_ON((s32)(end - cur) < 0);
2312
2313                 if (tp->Rx_skbuff[i])
2314                         continue;
2315
2316                 skb = rtl8169_alloc_rx_skb(tp->pci_dev, dev,
2317                                            tp->RxDescArray + i,
2318                                            tp->rx_buf_sz, tp->align);
2319                 if (!skb)
2320                         break;
2321
2322                 tp->Rx_skbuff[i] = skb;
2323         }
2324         return cur - start;
2325 }
2326
2327 static inline void rtl8169_mark_as_last_descriptor(struct RxDesc *desc)
2328 {
2329         desc->opts1 |= cpu_to_le32(RingEnd);
2330 }
2331
2332 static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)
2333 {
2334         tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
2335 }
2336
2337 static int rtl8169_init_ring(struct net_device *dev)
2338 {
2339         struct rtl8169_private *tp = netdev_priv(dev);
2340
2341         rtl8169_init_ring_indexes(tp);
2342
2343         memset(tp->tx_skb, 0x0, NUM_TX_DESC * sizeof(struct ring_info));
2344         memset(tp->Rx_skbuff, 0x0, NUM_RX_DESC * sizeof(struct sk_buff *));
2345
2346         if (rtl8169_rx_fill(tp, dev, 0, NUM_RX_DESC) != NUM_RX_DESC)
2347                 goto err_out;
2348
2349         rtl8169_mark_as_last_descriptor(tp->RxDescArray + NUM_RX_DESC - 1);
2350
2351         return 0;
2352
2353 err_out:
2354         rtl8169_rx_clear(tp);
2355         return -ENOMEM;
2356 }
2357
2358 static void rtl8169_unmap_tx_skb(struct pci_dev *pdev, struct ring_info *tx_skb,
2359                                  struct TxDesc *desc)
2360 {
2361         unsigned int len = tx_skb->len;
2362
2363         pci_unmap_single(pdev, le64_to_cpu(desc->addr), len, PCI_DMA_TODEVICE);
2364         desc->opts1 = 0x00;
2365         desc->opts2 = 0x00;
2366         desc->addr = 0x00;
2367         tx_skb->len = 0;
2368 }
2369
2370 static void rtl8169_tx_clear(struct rtl8169_private *tp)
2371 {
2372         unsigned int i;
2373
2374         for (i = tp->dirty_tx; i < tp->dirty_tx + NUM_TX_DESC; i++) {
2375                 unsigned int entry = i % NUM_TX_DESC;
2376                 struct ring_info *tx_skb = tp->tx_skb + entry;
2377                 unsigned int len = tx_skb->len;
2378
2379                 if (len) {
2380                         struct sk_buff *skb = tx_skb->skb;
2381
2382                         rtl8169_unmap_tx_skb(tp->pci_dev, tx_skb,
2383                                              tp->TxDescArray + entry);
2384                         if (skb) {
2385                                 dev_kfree_skb(skb);
2386                                 tx_skb->skb = NULL;
2387                         }
2388                         tp->dev->stats.tx_dropped++;
2389                 }
2390         }
2391         tp->cur_tx = tp->dirty_tx = 0;
2392 }
2393
2394 static void rtl8169_schedule_work(struct net_device *dev, work_func_t task)
2395 {
2396         struct rtl8169_private *tp = netdev_priv(dev);
2397
2398         PREPARE_DELAYED_WORK(&tp->task, task);
2399         schedule_delayed_work(&tp->task, 4);
2400 }
2401
2402 static void rtl8169_wait_for_quiescence(struct net_device *dev)
2403 {
2404         struct rtl8169_private *tp = netdev_priv(dev);
2405         void __iomem *ioaddr = tp->mmio_addr;
2406
2407         synchronize_irq(dev->irq);
2408
2409         /* Wait for any pending NAPI task to complete */
2410 #ifdef CONFIG_R8169_NAPI
2411         napi_disable(&tp->napi);
2412 #endif
2413
2414         rtl8169_irq_mask_and_ack(ioaddr);
2415
2416 #ifdef CONFIG_R8169_NAPI
2417         napi_enable(&tp->napi);
2418 #endif
2419 }
2420
2421 static void rtl8169_reinit_task(struct work_struct *work)
2422 {
2423         struct rtl8169_private *tp =
2424                 container_of(work, struct rtl8169_private, task.work);
2425         struct net_device *dev = tp->dev;
2426         int ret;
2427
2428         rtnl_lock();
2429
2430         if (!netif_running(dev))
2431                 goto out_unlock;
2432
2433         rtl8169_wait_for_quiescence(dev);
2434         rtl8169_close(dev);
2435
2436         ret = rtl8169_open(dev);
2437         if (unlikely(ret < 0)) {
2438                 if (net_ratelimit() && netif_msg_drv(tp)) {
2439                         printk(KERN_ERR PFX "%s: reinit failure (status = %d)."
2440                                " Rescheduling.\n", dev->name, ret);
2441                 }
2442                 rtl8169_schedule_work(dev, rtl8169_reinit_task);
2443         }
2444
2445 out_unlock:
2446         rtnl_unlock();
2447 }
2448
2449 static void rtl8169_reset_task(struct work_struct *work)
2450 {
2451         struct rtl8169_private *tp =
2452                 container_of(work, struct rtl8169_private, task.work);
2453         struct net_device *dev = tp->dev;
2454
2455         rtnl_lock();
2456
2457         if (!netif_running(dev))
2458                 goto out_unlock;
2459
2460         rtl8169_wait_for_quiescence(dev);
2461
2462         rtl8169_rx_interrupt(dev, tp, tp->mmio_addr, ~(u32)0);
2463         rtl8169_tx_clear(tp);
2464
2465         if (tp->dirty_rx == tp->cur_rx) {
2466                 rtl8169_init_ring_indexes(tp);
2467                 rtl_hw_start(dev);
2468                 netif_wake_queue(dev);
2469                 rtl8169_check_link_status(dev, tp, tp->mmio_addr);
2470         } else {
2471                 if (net_ratelimit() && netif_msg_intr(tp)) {
2472                         printk(KERN_EMERG PFX "%s: Rx buffers shortage\n",
2473                                dev->name);
2474                 }
2475                 rtl8169_schedule_work(dev, rtl8169_reset_task);
2476         }
2477
2478 out_unlock:
2479         rtnl_unlock();
2480 }
2481
2482 static void rtl8169_tx_timeout(struct net_device *dev)
2483 {
2484         struct rtl8169_private *tp = netdev_priv(dev);
2485
2486         rtl8169_hw_reset(tp->mmio_addr);
2487
2488         /* Let's wait a bit while any (async) irq lands on */
2489         rtl8169_schedule_work(dev, rtl8169_reset_task);
2490 }
2491
2492 static int rtl8169_xmit_frags(struct rtl8169_private *tp, struct sk_buff *skb,
2493                               u32 opts1)
2494 {
2495         struct skb_shared_info *info = skb_shinfo(skb);
2496         unsigned int cur_frag, entry;
2497         struct TxDesc * uninitialized_var(txd);
2498
2499         entry = tp->cur_tx;
2500         for (cur_frag = 0; cur_frag < info->nr_frags; cur_frag++) {
2501                 skb_frag_t *frag = info->frags + cur_frag;
2502                 dma_addr_t mapping;
2503                 u32 status, len;
2504                 void *addr;
2505
2506                 entry = (entry + 1) % NUM_TX_DESC;
2507
2508                 txd = tp->TxDescArray + entry;
2509                 len = frag->size;
2510                 addr = ((void *) page_address(frag->page)) + frag->page_offset;
2511                 mapping = pci_map_single(tp->pci_dev, addr, len, PCI_DMA_TODEVICE);
2512
2513                 /* anti gcc 2.95.3 bugware (sic) */
2514                 status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC));
2515
2516                 txd->opts1 = cpu_to_le32(status);
2517                 txd->addr = cpu_to_le64(mapping);
2518
2519                 tp->tx_skb[entry].len = len;
2520         }
2521
2522         if (cur_frag) {
2523                 tp->tx_skb[entry].skb = skb;
2524                 txd->opts1 |= cpu_to_le32(LastFrag);
2525         }
2526
2527         return cur_frag;
2528 }
2529
2530 static inline u32 rtl8169_tso_csum(struct sk_buff *skb, struct net_device *dev)
2531 {
2532         if (dev->features & NETIF_F_TSO) {
2533                 u32 mss = skb_shinfo(skb)->gso_size;
2534
2535                 if (mss)
2536                         return LargeSend | ((mss & MSSMask) << MSSShift);
2537         }
2538         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2539                 const struct iphdr *ip = ip_hdr(skb);
2540
2541                 if (ip->protocol == IPPROTO_TCP)
2542                         return IPCS | TCPCS;
2543                 else if (ip->protocol == IPPROTO_UDP)
2544                         return IPCS | UDPCS;
2545                 WARN_ON(1);     /* we need a WARN() */
2546         }
2547         return 0;
2548 }
2549
2550 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev)
2551 {
2552         struct rtl8169_private *tp = netdev_priv(dev);
2553         unsigned int frags, entry = tp->cur_tx % NUM_TX_DESC;
2554         struct TxDesc *txd = tp->TxDescArray + entry;
2555         void __iomem *ioaddr = tp->mmio_addr;
2556         dma_addr_t mapping;
2557         u32 status, len;
2558         u32 opts1;
2559         int ret = NETDEV_TX_OK;
2560
2561         if (unlikely(TX_BUFFS_AVAIL(tp) < skb_shinfo(skb)->nr_frags)) {
2562                 if (netif_msg_drv(tp)) {
2563                         printk(KERN_ERR
2564                                "%s: BUG! Tx Ring full when queue awake!\n",
2565                                dev->name);
2566                 }
2567                 goto err_stop;
2568         }
2569
2570         if (unlikely(le32_to_cpu(txd->opts1) & DescOwn))
2571                 goto err_stop;
2572
2573         opts1 = DescOwn | rtl8169_tso_csum(skb, dev);
2574
2575         frags = rtl8169_xmit_frags(tp, skb, opts1);
2576         if (frags) {
2577                 len = skb_headlen(skb);
2578                 opts1 |= FirstFrag;
2579         } else {
2580                 len = skb->len;
2581
2582                 if (unlikely(len < ETH_ZLEN)) {
2583                         if (skb_padto(skb, ETH_ZLEN))
2584                                 goto err_update_stats;
2585                         len = ETH_ZLEN;
2586                 }
2587
2588                 opts1 |= FirstFrag | LastFrag;
2589                 tp->tx_skb[entry].skb = skb;
2590         }
2591
2592         mapping = pci_map_single(tp->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
2593
2594         tp->tx_skb[entry].len = len;
2595         txd->addr = cpu_to_le64(mapping);
2596         txd->opts2 = cpu_to_le32(rtl8169_tx_vlan_tag(tp, skb));
2597
2598         wmb();
2599
2600         /* anti gcc 2.95.3 bugware (sic) */
2601         status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC));
2602         txd->opts1 = cpu_to_le32(status);
2603
2604         dev->trans_start = jiffies;
2605
2606         tp->cur_tx += frags + 1;
2607
2608         smp_wmb();
2609
2610         RTL_W8(TxPoll, NPQ);    /* set polling bit */
2611
2612         if (TX_BUFFS_AVAIL(tp) < MAX_SKB_FRAGS) {
2613                 netif_stop_queue(dev);
2614                 smp_rmb();
2615                 if (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)
2616                         netif_wake_queue(dev);
2617         }
2618
2619 out:
2620         return ret;
2621
2622 err_stop:
2623         netif_stop_queue(dev);
2624         ret = NETDEV_TX_BUSY;
2625 err_update_stats:
2626         dev->stats.tx_dropped++;
2627         goto out;
2628 }
2629
2630 static void rtl8169_pcierr_interrupt(struct net_device *dev)
2631 {
2632         struct rtl8169_private *tp = netdev_priv(dev);
2633         struct pci_dev *pdev = tp->pci_dev;
2634         void __iomem *ioaddr = tp->mmio_addr;
2635         u16 pci_status, pci_cmd;
2636
2637         pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
2638         pci_read_config_word(pdev, PCI_STATUS, &pci_status);
2639
2640         if (netif_msg_intr(tp)) {
2641                 printk(KERN_ERR
2642                        "%s: PCI error (cmd = 0x%04x, status = 0x%04x).\n",
2643                        dev->name, pci_cmd, pci_status);
2644         }
2645
2646         /*
2647          * The recovery sequence below admits a very elaborated explanation:
2648          * - it seems to work;
2649          * - I did not see what else could be done;
2650          * - it makes iop3xx happy.
2651          *
2652          * Feel free to adjust to your needs.
2653          */
2654         if (pdev->broken_parity_status)
2655                 pci_cmd &= ~PCI_COMMAND_PARITY;
2656         else
2657                 pci_cmd |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY;
2658
2659         pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
2660
2661         pci_write_config_word(pdev, PCI_STATUS,
2662                 pci_status & (PCI_STATUS_DETECTED_PARITY |
2663                 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_REC_MASTER_ABORT |
2664                 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_SIG_TARGET_ABORT));
2665
2666         /* The infamous DAC f*ckup only happens at boot time */
2667         if ((tp->cp_cmd & PCIDAC) && !tp->dirty_rx && !tp->cur_rx) {
2668                 if (netif_msg_intr(tp))
2669                         printk(KERN_INFO "%s: disabling PCI DAC.\n", dev->name);
2670                 tp->cp_cmd &= ~PCIDAC;
2671                 RTL_W16(CPlusCmd, tp->cp_cmd);
2672                 dev->features &= ~NETIF_F_HIGHDMA;
2673         }
2674
2675         rtl8169_hw_reset(ioaddr);
2676
2677         rtl8169_schedule_work(dev, rtl8169_reinit_task);
2678 }
2679
2680 static void rtl8169_tx_interrupt(struct net_device *dev,
2681                                  struct rtl8169_private *tp,
2682                                  void __iomem *ioaddr)
2683 {
2684         unsigned int dirty_tx, tx_left;
2685
2686         dirty_tx = tp->dirty_tx;
2687         smp_rmb();
2688         tx_left = tp->cur_tx - dirty_tx;
2689
2690         while (tx_left > 0) {
2691                 unsigned int entry = dirty_tx % NUM_TX_DESC;
2692                 struct ring_info *tx_skb = tp->tx_skb + entry;
2693                 u32 len = tx_skb->len;
2694                 u32 status;
2695
2696                 rmb();
2697                 status = le32_to_cpu(tp->TxDescArray[entry].opts1);
2698                 if (status & DescOwn)
2699                         break;
2700
2701                 dev->stats.tx_bytes += len;
2702                 dev->stats.tx_packets++;
2703
2704                 rtl8169_unmap_tx_skb(tp->pci_dev, tx_skb, tp->TxDescArray + entry);
2705
2706                 if (status & LastFrag) {
2707                         dev_kfree_skb_irq(tx_skb->skb);
2708                         tx_skb->skb = NULL;
2709                 }
2710                 dirty_tx++;
2711                 tx_left--;
2712         }
2713
2714         if (tp->dirty_tx != dirty_tx) {
2715                 tp->dirty_tx = dirty_tx;
2716                 smp_wmb();
2717                 if (netif_queue_stopped(dev) &&
2718                     (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)) {
2719                         netif_wake_queue(dev);
2720                 }
2721                 /*
2722                  * 8168 hack: TxPoll requests are lost when the Tx packets are
2723                  * too close. Let's kick an extra TxPoll request when a burst
2724                  * of start_xmit activity is detected (if it is not detected,
2725                  * it is slow enough). -- FR
2726                  */
2727                 smp_rmb();
2728                 if (tp->cur_tx != dirty_tx)
2729                         RTL_W8(TxPoll, NPQ);
2730         }
2731 }
2732
2733 static inline int rtl8169_fragmented_frame(u32 status)
2734 {
2735         return (status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag);
2736 }
2737
2738 static inline void rtl8169_rx_csum(struct sk_buff *skb, struct RxDesc *desc)
2739 {
2740         u32 opts1 = le32_to_cpu(desc->opts1);
2741         u32 status = opts1 & RxProtoMask;
2742
2743         if (((status == RxProtoTCP) && !(opts1 & TCPFail)) ||
2744             ((status == RxProtoUDP) && !(opts1 & UDPFail)) ||
2745             ((status == RxProtoIP) && !(opts1 & IPFail)))
2746                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2747         else
2748                 skb->ip_summed = CHECKSUM_NONE;
2749 }
2750
2751 static inline bool rtl8169_try_rx_copy(struct sk_buff **sk_buff,
2752                                        struct rtl8169_private *tp, int pkt_size,
2753                                        dma_addr_t addr)
2754 {
2755         struct sk_buff *skb;
2756         bool done = false;
2757
2758         if (pkt_size >= rx_copybreak)
2759                 goto out;
2760
2761         skb = netdev_alloc_skb(tp->dev, pkt_size + NET_IP_ALIGN);
2762         if (!skb)
2763                 goto out;
2764
2765         pci_dma_sync_single_for_cpu(tp->pci_dev, addr, pkt_size,
2766                                     PCI_DMA_FROMDEVICE);
2767         skb_reserve(skb, NET_IP_ALIGN);
2768         skb_copy_from_linear_data(*sk_buff, skb->data, pkt_size);
2769         *sk_buff = skb;
2770         done = true;
2771 out:
2772         return done;
2773 }
2774
2775 static int rtl8169_rx_interrupt(struct net_device *dev,
2776                                 struct rtl8169_private *tp,
2777                                 void __iomem *ioaddr, u32 budget)
2778 {
2779         unsigned int cur_rx, rx_left;
2780         unsigned int delta, count;
2781
2782         cur_rx = tp->cur_rx;
2783         rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
2784         rx_left = rtl8169_rx_quota(rx_left, budget);
2785
2786         for (; rx_left > 0; rx_left--, cur_rx++) {
2787                 unsigned int entry = cur_rx % NUM_RX_DESC;
2788                 struct RxDesc *desc = tp->RxDescArray + entry;
2789                 u32 status;
2790
2791                 rmb();
2792                 status = le32_to_cpu(desc->opts1);
2793
2794                 if (status & DescOwn)
2795                         break;
2796                 if (unlikely(status & RxRES)) {
2797                         if (netif_msg_rx_err(tp)) {
2798                                 printk(KERN_INFO
2799                                        "%s: Rx ERROR. status = %08x\n",
2800                                        dev->name, status);
2801                         }
2802                         dev->stats.rx_errors++;
2803                         if (status & (RxRWT | RxRUNT))
2804                                 dev->stats.rx_length_errors++;
2805                         if (status & RxCRC)
2806                                 dev->stats.rx_crc_errors++;
2807                         if (status & RxFOVF) {
2808                                 rtl8169_schedule_work(dev, rtl8169_reset_task);
2809                                 dev->stats.rx_fifo_errors++;
2810                         }
2811                         rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2812                 } else {
2813                         struct sk_buff *skb = tp->Rx_skbuff[entry];
2814                         dma_addr_t addr = le64_to_cpu(desc->addr);
2815                         int pkt_size = (status & 0x00001FFF) - 4;
2816                         struct pci_dev *pdev = tp->pci_dev;
2817
2818                         /*
2819                          * The driver does not support incoming fragmented
2820                          * frames. They are seen as a symptom of over-mtu
2821                          * sized frames.
2822                          */
2823                         if (unlikely(rtl8169_fragmented_frame(status))) {
2824                                 dev->stats.rx_dropped++;
2825                                 dev->stats.rx_length_errors++;
2826                                 rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2827                                 continue;
2828                         }
2829
2830                         rtl8169_rx_csum(skb, desc);
2831
2832                         if (rtl8169_try_rx_copy(&skb, tp, pkt_size, addr)) {
2833                                 pci_dma_sync_single_for_device(pdev, addr,
2834                                         pkt_size, PCI_DMA_FROMDEVICE);
2835                                 rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2836                         } else {
2837                                 pci_unmap_single(pdev, addr, pkt_size,
2838                                                  PCI_DMA_FROMDEVICE);
2839                                 tp->Rx_skbuff[entry] = NULL;
2840                         }
2841
2842                         skb_put(skb, pkt_size);
2843                         skb->protocol = eth_type_trans(skb, dev);
2844
2845                         if (rtl8169_rx_vlan_skb(tp, desc, skb) < 0)
2846                                 rtl8169_rx_skb(skb);
2847
2848                         dev->last_rx = jiffies;
2849                         dev->stats.rx_bytes += pkt_size;
2850                         dev->stats.rx_packets++;
2851                 }
2852
2853                 /* Work around for AMD plateform. */
2854                 if ((desc->opts2 & 0xfffe000) &&
2855                     (tp->mac_version == RTL_GIGA_MAC_VER_05)) {
2856                         desc->opts2 = 0;
2857                         cur_rx++;
2858                 }
2859         }
2860
2861         count = cur_rx - tp->cur_rx;
2862         tp->cur_rx = cur_rx;
2863
2864         delta = rtl8169_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);
2865         if (!delta && count && netif_msg_intr(tp))
2866                 printk(KERN_INFO "%s: no Rx buffer allocated\n", dev->name);
2867         tp->dirty_rx += delta;
2868
2869         /*
2870          * FIXME: until there is periodic timer to try and refill the ring,
2871          * a temporary shortage may definitely kill the Rx process.
2872          * - disable the asic to try and avoid an overflow and kick it again
2873          *   after refill ?
2874          * - how do others driver handle this condition (Uh oh...).
2875          */
2876         if ((tp->dirty_rx + NUM_RX_DESC == tp->cur_rx) && netif_msg_intr(tp))
2877                 printk(KERN_EMERG "%s: Rx buffers exhausted\n", dev->name);
2878
2879         return count;
2880 }
2881
2882 static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
2883 {
2884         struct net_device *dev = dev_instance;
2885         struct rtl8169_private *tp = netdev_priv(dev);
2886         int boguscnt = max_interrupt_work;
2887         void __iomem *ioaddr = tp->mmio_addr;
2888         int status;
2889         int handled = 0;
2890
2891         do {
2892                 status = RTL_R16(IntrStatus);
2893
2894                 /* hotplug/major error/no more work/shared irq */
2895                 if ((status == 0xFFFF) || !status)
2896                         break;
2897
2898                 handled = 1;
2899
2900                 if (unlikely(!netif_running(dev))) {
2901                         rtl8169_asic_down(ioaddr);
2902                         goto out;
2903                 }
2904
2905                 status &= tp->intr_mask;
2906                 RTL_W16(IntrStatus,
2907                         (status & RxFIFOOver) ? (status | RxOverflow) : status);
2908
2909                 if (!(status & tp->intr_event))
2910                         break;
2911
2912                 /* Work around for rx fifo overflow */
2913                 if (unlikely(status & RxFIFOOver) &&
2914                     (tp->mac_version == RTL_GIGA_MAC_VER_11)) {
2915                         netif_stop_queue(dev);
2916                         rtl8169_tx_timeout(dev);
2917                         break;
2918                 }
2919
2920                 if (unlikely(status & SYSErr)) {
2921                         rtl8169_pcierr_interrupt(dev);
2922                         break;
2923                 }
2924
2925                 if (status & LinkChg)
2926                         rtl8169_check_link_status(dev, tp, ioaddr);
2927
2928 #ifdef CONFIG_R8169_NAPI
2929                 if (status & tp->napi_event) {
2930                         RTL_W16(IntrMask, tp->intr_event & ~tp->napi_event);
2931                         tp->intr_mask = ~tp->napi_event;
2932
2933                 if (likely(netif_rx_schedule_prep(dev, &tp->napi)))
2934                         __netif_rx_schedule(dev, &tp->napi);
2935                         else if (netif_msg_intr(tp)) {
2936                                 printk(KERN_INFO "%s: interrupt %04x in poll\n",
2937                                        dev->name, status);
2938                         }
2939                 }
2940                 break;
2941 #else
2942                 /* Rx interrupt */
2943                 if (status & (RxOK | RxOverflow | RxFIFOOver))
2944                         rtl8169_rx_interrupt(dev, tp, ioaddr, ~(u32)0);
2945
2946                 /* Tx interrupt */
2947                 if (status & (TxOK | TxErr))
2948                         rtl8169_tx_interrupt(dev, tp, ioaddr);
2949 #endif
2950
2951                 boguscnt--;
2952         } while (boguscnt > 0);
2953
2954         if (boguscnt <= 0) {
2955                 if (netif_msg_intr(tp) && net_ratelimit() ) {
2956                         printk(KERN_WARNING
2957                                "%s: Too much work at interrupt!\n", dev->name);
2958                 }
2959                 /* Clear all interrupt sources. */
2960                 RTL_W16(IntrStatus, 0xffff);
2961         }
2962 out:
2963         return IRQ_RETVAL(handled);
2964 }
2965
2966 #ifdef CONFIG_R8169_NAPI
2967 static int rtl8169_poll(struct napi_struct *napi, int budget)
2968 {
2969         struct rtl8169_private *tp = container_of(napi, struct rtl8169_private, napi);
2970         struct net_device *dev = tp->dev;
2971         void __iomem *ioaddr = tp->mmio_addr;
2972         int work_done;
2973
2974         work_done = rtl8169_rx_interrupt(dev, tp, ioaddr, (u32) budget);
2975         rtl8169_tx_interrupt(dev, tp, ioaddr);
2976
2977         if (work_done < budget) {
2978                 netif_rx_complete(dev, napi);
2979                 tp->intr_mask = 0xffff;
2980                 /*
2981                  * 20040426: the barrier is not strictly required but the
2982                  * behavior of the irq handler could be less predictable
2983                  * without it. Btw, the lack of flush for the posted pci
2984                  * write is safe - FR
2985                  */
2986                 smp_wmb();
2987                 RTL_W16(IntrMask, tp->intr_event);
2988         }
2989
2990         return work_done;
2991 }
2992 #endif
2993
2994 static void rtl8169_down(struct net_device *dev)
2995 {
2996         struct rtl8169_private *tp = netdev_priv(dev);
2997         void __iomem *ioaddr = tp->mmio_addr;
2998         unsigned int intrmask;
2999
3000         rtl8169_delete_timer(dev);
3001
3002         netif_stop_queue(dev);
3003
3004 #ifdef CONFIG_R8169_NAPI
3005         napi_disable(&tp->napi);
3006 #endif
3007
3008 core_down:
3009         spin_lock_irq(&tp->lock);
3010
3011         rtl8169_asic_down(ioaddr);
3012
3013         /* Update the error counts. */
3014         dev->stats.rx_missed_errors += RTL_R32(RxMissed);
3015         RTL_W32(RxMissed, 0);
3016
3017         spin_unlock_irq(&tp->lock);
3018
3019         synchronize_irq(dev->irq);
3020
3021         /* Give a racing hard_start_xmit a few cycles to complete. */
3022         synchronize_sched();  /* FIXME: should this be synchronize_irq()? */
3023
3024         /*
3025          * And now for the 50k$ question: are IRQ disabled or not ?
3026          *
3027          * Two paths lead here:
3028          * 1) dev->close
3029          *    -> netif_running() is available to sync the current code and the
3030          *       IRQ handler. See rtl8169_interrupt for details.
3031          * 2) dev->change_mtu
3032          *    -> rtl8169_poll can not be issued again and re-enable the
3033          *       interruptions. Let's simply issue the IRQ down sequence again.
3034          *
3035          * No loop if hotpluged or major error (0xffff).
3036          */
3037         intrmask = RTL_R16(IntrMask);
3038         if (intrmask && (intrmask != 0xffff))
3039                 goto core_down;
3040
3041         rtl8169_tx_clear(tp);
3042
3043         rtl8169_rx_clear(tp);
3044 }
3045
3046 static int rtl8169_close(struct net_device *dev)
3047 {
3048         struct rtl8169_private *tp = netdev_priv(dev);
3049         struct pci_dev *pdev = tp->pci_dev;
3050
3051         rtl8169_down(dev);
3052
3053         free_irq(dev->irq, dev);
3054
3055         pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
3056                             tp->RxPhyAddr);
3057         pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
3058                             tp->TxPhyAddr);
3059         tp->TxDescArray = NULL;
3060         tp->RxDescArray = NULL;
3061
3062         return 0;
3063 }
3064
3065 static void rtl_set_rx_mode(struct net_device *dev)
3066 {
3067         struct rtl8169_private *tp = netdev_priv(dev);
3068         void __iomem *ioaddr = tp->mmio_addr;
3069         unsigned long flags;
3070         u32 mc_filter[2];       /* Multicast hash filter */
3071         int rx_mode;
3072         u32 tmp = 0;
3073
3074         if (dev->flags & IFF_PROMISC) {
3075                 /* Unconditionally log net taps. */
3076                 if (netif_msg_link(tp)) {
3077                         printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n",
3078                                dev->name);
3079                 }
3080                 rx_mode =
3081                     AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
3082                     AcceptAllPhys;
3083                 mc_filter[1] = mc_filter[0] = 0xffffffff;
3084         } else if ((dev->mc_count > multicast_filter_limit)
3085                    || (dev->flags & IFF_ALLMULTI)) {
3086                 /* Too many to filter perfectly -- accept all multicasts. */
3087                 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
3088                 mc_filter[1] = mc_filter[0] = 0xffffffff;
3089         } else {
3090                 struct dev_mc_list *mclist;
3091                 unsigned int i;
3092
3093                 rx_mode = AcceptBroadcast | AcceptMyPhys;
3094                 mc_filter[1] = mc_filter[0] = 0;
3095                 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
3096                      i++, mclist = mclist->next) {
3097                         int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
3098                         mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
3099                         rx_mode |= AcceptMulticast;
3100                 }
3101         }
3102
3103         spin_lock_irqsave(&tp->lock, flags);
3104
3105         tmp = rtl8169_rx_config | rx_mode |
3106               (RTL_R32(RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
3107
3108         if ((tp->mac_version == RTL_GIGA_MAC_VER_11) ||
3109             (tp->mac_version == RTL_GIGA_MAC_VER_12) ||
3110             (tp->mac_version == RTL_GIGA_MAC_VER_13) ||
3111             (tp->mac_version == RTL_GIGA_MAC_VER_14) ||
3112             (tp->mac_version == RTL_GIGA_MAC_VER_15) ||
3113             (tp->mac_version == RTL_GIGA_MAC_VER_16) ||
3114             (tp->mac_version == RTL_GIGA_MAC_VER_17)) {
3115                 mc_filter[0] = 0xffffffff;
3116                 mc_filter[1] = 0xffffffff;
3117         }
3118
3119         RTL_W32(MAR0 + 0, mc_filter[0]);
3120         RTL_W32(MAR0 + 4, mc_filter[1]);
3121
3122         RTL_W32(RxConfig, tmp);
3123
3124         spin_unlock_irqrestore(&tp->lock, flags);
3125 }
3126
3127 /**
3128  *  rtl8169_get_stats - Get rtl8169 read/write statistics
3129  *  @dev: The Ethernet Device to get statistics for
3130  *
3131  *  Get TX/RX statistics for rtl8169
3132  */
3133 static struct net_device_stats *rtl8169_get_stats(struct net_device *dev)
3134 {
3135         struct rtl8169_private *tp = netdev_priv(dev);
3136         void __iomem *ioaddr = tp->mmio_addr;
3137         unsigned long flags;
3138
3139         if (netif_running(dev)) {
3140                 spin_lock_irqsave(&tp->lock, flags);
3141                 dev->stats.rx_missed_errors += RTL_R32(RxMissed);
3142                 RTL_W32(RxMissed, 0);
3143                 spin_unlock_irqrestore(&tp->lock, flags);
3144         }
3145
3146         return &dev->stats;
3147 }
3148
3149 #ifdef CONFIG_PM
3150
3151 static int rtl8169_suspend(struct pci_dev *pdev, pm_message_t state)
3152 {
3153         struct net_device *dev = pci_get_drvdata(pdev);
3154         struct rtl8169_private *tp = netdev_priv(dev);
3155         void __iomem *ioaddr = tp->mmio_addr;
3156
3157         if (!netif_running(dev))
3158                 goto out_pci_suspend;
3159
3160         netif_device_detach(dev);
3161         netif_stop_queue(dev);
3162
3163         spin_lock_irq(&tp->lock);
3164
3165         rtl8169_asic_down(ioaddr);
3166
3167         dev->stats.rx_missed_errors += RTL_R32(RxMissed);
3168         RTL_W32(RxMissed, 0);
3169
3170         spin_unlock_irq(&tp->lock);
3171
3172 out_pci_suspend:
3173         pci_save_state(pdev);
3174         pci_enable_wake(pdev, pci_choose_state(pdev, state),
3175                 (tp->features & RTL_FEATURE_WOL) ? 1 : 0);
3176         pci_set_power_state(pdev, pci_choose_state(pdev, state));
3177
3178         return 0;
3179 }
3180
3181 static int rtl8169_resume(struct pci_dev *pdev)
3182 {
3183         struct net_device *dev = pci_get_drvdata(pdev);
3184
3185         pci_set_power_state(pdev, PCI_D0);
3186         pci_restore_state(pdev);
3187         pci_enable_wake(pdev, PCI_D0, 0);
3188
3189         if (!netif_running(dev))
3190                 goto out;
3191
3192         netif_device_attach(dev);
3193
3194         rtl8169_schedule_work(dev, rtl8169_reset_task);
3195 out:
3196         return 0;
3197 }
3198
3199 #endif /* CONFIG_PM */
3200
3201 static struct pci_driver rtl8169_pci_driver = {
3202         .name           = MODULENAME,
3203         .id_table       = rtl8169_pci_tbl,
3204         .probe          = rtl8169_init_one,
3205         .remove         = __devexit_p(rtl8169_remove_one),
3206 #ifdef CONFIG_PM
3207         .suspend        = rtl8169_suspend,
3208         .resume         = rtl8169_resume,
3209 #endif
3210 };
3211
3212 static int __init rtl8169_init_module(void)
3213 {
3214         return pci_register_driver(&rtl8169_pci_driver);
3215 }
3216
3217 static void __exit rtl8169_cleanup_module(void)
3218 {
3219         pci_unregister_driver(&rtl8169_pci_driver);
3220 }
3221
3222 module_init(rtl8169_init_module);
3223 module_exit(rtl8169_cleanup_module);