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 enum phy_version {
 127         RTL_GIGA_PHY_VER_C = 0x03, /* PHY Reg 0x03 bit0-3 == 0x0000 */
 128         RTL_GIGA_PHY_VER_D = 0x04, /* PHY Reg 0x03 bit0-3 == 0x0000 */
 129         RTL_GIGA_PHY_VER_E = 0x05, /* PHY Reg 0x03 bit0-3 == 0x0000 */
 130         RTL_GIGA_PHY_VER_F = 0x06, /* PHY Reg 0x03 bit0-3 == 0x0001 */
 131         RTL_GIGA_PHY_VER_G = 0x07, /* PHY Reg 0x03 bit0-3 == 0x0002 */
 132         RTL_GIGA_PHY_VER_H = 0x08, /* PHY Reg 0x03 bit0-3 == 0x0003 */
 133 };
 134
 135 #define _R(NAME,MAC,MASK) \
 136         { .name = NAME, .mac_version = MAC, .RxConfigMask = MASK }
 137
 138 static const struct {
 139         const char *name;
 140         u8 mac_version;
 141         u32 RxConfigMask;       /* Clears the bits supported by this chip */
 142 } rtl_chip_info[] = {
 143         _R("RTL8169",           RTL_GIGA_MAC_VER_01, 0xff7e1880), // 8169
 144         _R("RTL8169s",          RTL_GIGA_MAC_VER_02, 0xff7e1880), // 8169S
 145         _R("RTL8110s",          RTL_GIGA_MAC_VER_03, 0xff7e1880), // 8110S
 146         _R("RTL8169sb/8110sb",  RTL_GIGA_MAC_VER_04, 0xff7e1880), // 8169SB
 147         _R("RTL8169sc/8110sc",  RTL_GIGA_MAC_VER_05, 0xff7e1880), // 8110SCd
 148         _R("RTL8169sc/8110sc",  RTL_GIGA_MAC_VER_06, 0xff7e1880), // 8110SCe
 149         _R("RTL8168b/8111b",    RTL_GIGA_MAC_VER_11, 0xff7e1880), // PCI-E
 150         _R("RTL8168b/8111b",    RTL_GIGA_MAC_VER_12, 0xff7e1880), // PCI-E
 151         _R("RTL8101e",          RTL_GIGA_MAC_VER_13, 0xff7e1880), // PCI-E 8139
 152         _R("RTL8100e",          RTL_GIGA_MAC_VER_14, 0xff7e1880), // PCI-E 8139
 153         _R("RTL8100e",          RTL_GIGA_MAC_VER_15, 0xff7e1880), // PCI-E 8139
 154         _R("RTL8168b/8111b",    RTL_GIGA_MAC_VER_17, 0xff7e1880), // PCI-E
 155         _R("RTL8101e",          RTL_GIGA_MAC_VER_16, 0xff7e1880), // PCI-E
 156         _R("RTL8168cp/8111cp",  RTL_GIGA_MAC_VER_18, 0xff7e1880), // PCI-E
 157         _R("RTL8168c/8111c",    RTL_GIGA_MAC_VER_19, 0xff7e1880), // PCI-E
 158         _R("RTL8168c/8111c",    RTL_GIGA_MAC_VER_20, 0xff7e1880)  // PCI-E
 159 };
 160 #undef _R
 161
 162 enum cfg_version {
 163         RTL_CFG_0 = 0x00,
 164         RTL_CFG_1,
 165         RTL_CFG_2
 166 };
 167
 168 static void rtl_hw_start_8169(struct net_device *);
 169 static void rtl_hw_start_8168(struct net_device *);
 170 static void rtl_hw_start_8101(struct net_device *);
 171
 172 static struct pci_device_id rtl8169_pci_tbl[] = {
 173         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8129), 0, 0, RTL_CFG_0 },
 174         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8136), 0, 0, RTL_CFG_2 },
 175         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8167), 0, 0, RTL_CFG_0 },
 176         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8168), 0, 0, RTL_CFG_1 },
 177         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8169), 0, 0, RTL_CFG_0 },
 178         { PCI_DEVICE(PCI_VENDOR_ID_DLINK,       0x4300), 0, 0, RTL_CFG_0 },
 179         { PCI_DEVICE(PCI_VENDOR_ID_AT,          0xc107), 0, 0, RTL_CFG_0 },
 180         { PCI_DEVICE(0x16ec,                    0x0116), 0, 0, RTL_CFG_0 },
 181         { PCI_VENDOR_ID_LINKSYS,                0x1032,
 182                 PCI_ANY_ID, 0x0024, 0, 0, RTL_CFG_0 },
 183         {0,},
 184 };
 185
 186 MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl);
 187
 188 static int rx_copybreak = 200;
 189 static int use_dac;
 190 static struct {
 191         u32 msg_enable;
 192 } debug = { -1 };
 193
 194 enum rtl_registers {
 195         MAC0            = 0,    /* Ethernet hardware address. */
 196         MAC4            = 4,
 197         MAR0            = 8,    /* Multicast filter. */
 198         CounterAddrLow          = 0x10,
 199         CounterAddrHigh         = 0x14,
 200         TxDescStartAddrLow      = 0x20,
 201         TxDescStartAddrHigh     = 0x24,
 202         TxHDescStartAddrLow     = 0x28,
 203         TxHDescStartAddrHigh    = 0x2c,
 204         FLASH           = 0x30,
 205         ERSR            = 0x36,
 206         ChipCmd         = 0x37,
 207         TxPoll          = 0x38,
 208         IntrMask        = 0x3c,
 209         IntrStatus      = 0x3e,
 210         TxConfig        = 0x40,
 211         RxConfig        = 0x44,
 212         RxMissed        = 0x4c,
 213         Cfg9346         = 0x50,
 214         Config0         = 0x51,
 215         Config1         = 0x52,
 216         Config2         = 0x53,
 217         Config3         = 0x54,
 218         Config4         = 0x55,
 219         Config5         = 0x56,
 220         MultiIntr       = 0x5c,
 221         PHYAR           = 0x60,
 222         TBICSR          = 0x64,
 223         TBI_ANAR        = 0x68,
 224         TBI_LPAR        = 0x6a,
 225         PHYstatus       = 0x6c,
 226         RxMaxSize       = 0xda,
 227         CPlusCmd        = 0xe0,
 228         IntrMitigate    = 0xe2,
 229         RxDescAddrLow   = 0xe4,
 230         RxDescAddrHigh  = 0xe8,
 231         EarlyTxThres    = 0xec,
 232         FuncEvent       = 0xf0,
 233         FuncEventMask   = 0xf4,
 234         FuncPresetState = 0xf8,
 235         FuncForceEvent  = 0xfc,
 236 };
 237
 238 enum rtl_register_content {
 239         /* InterruptStatusBits */
 240         SYSErr          = 0x8000,
 241         PCSTimeout      = 0x4000,
 242         SWInt           = 0x0100,
 243         TxDescUnavail   = 0x0080,
 244         RxFIFOOver      = 0x0040,
 245         LinkChg         = 0x0020,
 246         RxOverflow      = 0x0010,
 247         TxErr           = 0x0008,
 248         TxOK            = 0x0004,
 249         RxErr           = 0x0002,
 250         RxOK            = 0x0001,
 251
 252         /* RxStatusDesc */
 253         RxFOVF  = (1 << 23),
 254         RxRWT   = (1 << 22),
 255         RxRES   = (1 << 21),
 256         RxRUNT  = (1 << 20),
 257         RxCRC   = (1 << 19),
 258
 259         /* ChipCmdBits */
 260         CmdReset        = 0x10,
 261         CmdRxEnb        = 0x08,
 262         CmdTxEnb        = 0x04,
 263         RxBufEmpty      = 0x01,
 264
 265         /* TXPoll register p.5 */
 266         HPQ             = 0x80,         /* Poll cmd on the high prio queue */
 267         NPQ             = 0x40,         /* Poll cmd on the low prio queue */
 268         FSWInt          = 0x01,         /* Forced software interrupt */
 269
 270         /* Cfg9346Bits */
 271         Cfg9346_Lock    = 0x00,
 272         Cfg9346_Unlock  = 0xc0,
 273
 274         /* rx_mode_bits */
 275         AcceptErr       = 0x20,
 276         AcceptRunt      = 0x10,
 277         AcceptBroadcast = 0x08,
 278         AcceptMulticast = 0x04,
 279         AcceptMyPhys    = 0x02,
 280         AcceptAllPhys   = 0x01,
 281
 282         /* RxConfigBits */
 283         RxCfgFIFOShift  = 13,
 284         RxCfgDMAShift   =  8,
 285
 286         /* TxConfigBits */
 287         TxInterFrameGapShift = 24,
 288         TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
 289
 290         /* Config1 register p.24 */
 291         MSIEnable       = (1 << 5),     /* Enable Message Signaled Interrupt */
 292         PMEnable        = (1 << 0),     /* Power Management Enable */
 293
 294         /* Config2 register p. 25 */
 295         PCI_Clock_66MHz = 0x01,
 296         PCI_Clock_33MHz = 0x00,
 297
 298         /* Config3 register p.25 */
 299         MagicPacket     = (1 << 5),     /* Wake up when receives a Magic Packet */
 300         LinkUp          = (1 << 4),     /* Wake up when the cable connection is re-established */
 301
 302         /* Config5 register p.27 */
 303         BWF             = (1 << 6),     /* Accept Broadcast wakeup frame */
 304         MWF             = (1 << 5),     /* Accept Multicast wakeup frame */
 305         UWF             = (1 << 4),     /* Accept Unicast wakeup frame */
 306         LanWake         = (1 << 1),     /* LanWake enable/disable */
 307         PMEStatus       = (1 << 0),     /* PME status can be reset by PCI RST# */
 308
 309         /* TBICSR p.28 */
 310         TBIReset        = 0x80000000,
 311         TBILoopback     = 0x40000000,
 312         TBINwEnable     = 0x20000000,
 313         TBINwRestart    = 0x10000000,
 314         TBILinkOk       = 0x02000000,
 315         TBINwComplete   = 0x01000000,
 316
 317         /* CPlusCmd p.31 */
 318         PktCntrDisable  = (1 << 7),     // 8168
 319         RxVlan          = (1 << 6),
 320         RxChkSum        = (1 << 5),
 321         PCIDAC          = (1 << 4),
 322         PCIMulRW        = (1 << 3),
 323         INTT_0          = 0x0000,       // 8168
 324         INTT_1          = 0x0001,       // 8168
 325         INTT_2          = 0x0002,       // 8168
 326         INTT_3          = 0x0003,       // 8168
 327
 328         /* rtl8169_PHYstatus */
 329         TBI_Enable      = 0x80,
 330         TxFlowCtrl      = 0x40,
 331         RxFlowCtrl      = 0x20,
 332         _1000bpsF       = 0x10,
 333         _100bps         = 0x08,
 334         _10bps          = 0x04,
 335         LinkStatus      = 0x02,
 336         FullDup         = 0x01,
 337
 338         /* _TBICSRBit */
 339         TBILinkOK       = 0x02000000,
 340
 341         /* DumpCounterCommand */
 342         CounterDump     = 0x8,
 343 };
 344
 345 enum desc_status_bit {
 346         DescOwn         = (1 << 31), /* Descriptor is owned by NIC */
 347         RingEnd         = (1 << 30), /* End of descriptor ring */
 348         FirstFrag       = (1 << 29), /* First segment of a packet */
 349         LastFrag        = (1 << 28), /* Final segment of a packet */
 350
 351         /* Tx private */
 352         LargeSend       = (1 << 27), /* TCP Large Send Offload (TSO) */
 353         MSSShift        = 16,        /* MSS value position */
 354         MSSMask         = 0xfff,     /* MSS value + LargeSend bit: 12 bits */
 355         IPCS            = (1 << 18), /* Calculate IP checksum */
 356         UDPCS           = (1 << 17), /* Calculate UDP/IP checksum */
 357         TCPCS           = (1 << 16), /* Calculate TCP/IP checksum */
 358         TxVlanTag       = (1 << 17), /* Add VLAN tag */
 359
 360         /* Rx private */
 361         PID1            = (1 << 18), /* Protocol ID bit 1/2 */
 362         PID0            = (1 << 17), /* Protocol ID bit 2/2 */
 363
 364 #define RxProtoUDP      (PID1)
 365 #define RxProtoTCP      (PID0)
 366 #define RxProtoIP       (PID1 | PID0)
 367 #define RxProtoMask     RxProtoIP
 368
 369         IPFail          = (1 << 16), /* IP checksum failed */
 370         UDPFail         = (1 << 15), /* UDP/IP checksum failed */
 371         TCPFail         = (1 << 14), /* TCP/IP checksum failed */
 372         RxVlanTag       = (1 << 16), /* VLAN tag available */
 373 };
 374
 375 #define RsvdMask        0x3fffc000
 376
 377 struct TxDesc {
 378         __le32 opts1;
 379         __le32 opts2;
 380         __le64 addr;
 381 };
 382
 383 struct RxDesc {
 384         __le32 opts1;
 385         __le32 opts2;
 386         __le64 addr;
 387 };
 388
 389 struct ring_info {
 390         struct sk_buff  *skb;
 391         u32             len;
 392         u8              __pad[sizeof(void *) - sizeof(u32)];
 393 };
 394
 395 enum features {
 396         RTL_FEATURE_WOL = (1 << 0),
 397         RTL_FEATURE_MSI = (1 << 1),
 398 };
 399
 400 struct rtl8169_private {
 401         void __iomem *mmio_addr;        /* memory map physical address */
 402         struct pci_dev *pci_dev;        /* Index of PCI device */
 403         struct net_device *dev;
 404         struct napi_struct napi;
 405         spinlock_t lock;                /* spin lock flag */
 406         u32 msg_enable;
 407         int chipset;
 408         int mac_version;
 409         int phy_version;
 410         u32 cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
 411         u32 cur_tx; /* Index into the Tx descriptor buffer of next Rx pkt. */
 412         u32 dirty_rx;
 413         u32 dirty_tx;
 414         struct TxDesc *TxDescArray;     /* 256-aligned Tx descriptor ring */
 415         struct RxDesc *RxDescArray;     /* 256-aligned Rx descriptor ring */
 416         dma_addr_t TxPhyAddr;
 417         dma_addr_t RxPhyAddr;
 418         struct sk_buff *Rx_skbuff[NUM_RX_DESC]; /* Rx data buffers */
 419         struct ring_info tx_skb[NUM_TX_DESC];   /* Tx data buffers */
 420         unsigned align;
 421         unsigned rx_buf_sz;
 422         struct timer_list timer;
 423         u16 cp_cmd;
 424         u16 intr_event;
 425         u16 napi_event;
 426         u16 intr_mask;
 427         int phy_auto_nego_reg;
 428         int phy_1000_ctrl_reg;
 429 #ifdef CONFIG_R8169_VLAN
 430         struct vlan_group *vlgrp;
 431 #endif
 432         int (*set_speed)(struct net_device *, u8 autoneg, u16 speed, u8 duplex);
 433         void (*get_settings)(struct net_device *, struct ethtool_cmd *);
 434         void (*phy_reset_enable)(void __iomem *);
 435         void (*hw_start)(struct net_device *);
 436         unsigned int (*phy_reset_pending)(void __iomem *);
 437         unsigned int (*link_ok)(void __iomem *);
 438         struct delayed_work task;
 439         unsigned features;
 440 };
 441
 442 MODULE_AUTHOR("Realtek and the Linux r8169 crew <netdev@vger.kernel.org>");
 443 MODULE_DESCRIPTION("RealTek RTL-8169 Gigabit Ethernet driver");
 444 module_param(rx_copybreak, int, 0);
 445 MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
 446 module_param(use_dac, int, 0);
 447 MODULE_PARM_DESC(use_dac, "Enable PCI DAC. Unsafe on 32 bit PCI slot.");
 448 module_param_named(debug, debug.msg_enable, int, 0);
 449 MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
 450 MODULE_LICENSE("GPL");
 451 MODULE_VERSION(RTL8169_VERSION);
 452
 453 static int rtl8169_open(struct net_device *dev);
 454 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev);
 455 static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance);
 456 static int rtl8169_init_ring(struct net_device *dev);
 457 static void rtl_hw_start(struct net_device *dev);
 458 static int rtl8169_close(struct net_device *dev);
 459 static void rtl_set_rx_mode(struct net_device *dev);
 460 static void rtl8169_tx_timeout(struct net_device *dev);
 461 static struct net_device_stats *rtl8169_get_stats(struct net_device *dev);
 462 static int rtl8169_rx_interrupt(struct net_device *, struct rtl8169_private *,
 463                                 void __iomem *, u32 budget);
 464 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu);
 465 static void rtl8169_down(struct net_device *dev);
 466 static void rtl8169_rx_clear(struct rtl8169_private *tp);
 467
 468 #ifdef CONFIG_R8169_NAPI
 469 static int rtl8169_poll(struct napi_struct *napi, int budget);
 470 #endif
 471
 472 static const unsigned int rtl8169_rx_config =
 473         (RX_FIFO_THRESH << RxCfgFIFOShift) | (RX_DMA_BURST << RxCfgDMAShift);
 474
 475 static void mdio_write(void __iomem *ioaddr, int reg_addr, int value)
 476 {
 477         int i;
 478
 479         RTL_W32(PHYAR, 0x80000000 | (reg_addr & 0xFF) << 16 | value);
 480
 481         for (i = 20; i > 0; i--) {
 482                 /*
 483                  * Check if the RTL8169 has completed writing to the specified
 484                  * MII register.
 485                  */
 486                 if (!(RTL_R32(PHYAR) & 0x80000000))
 487                         break;
 488                 udelay(25);
 489         }
 490 }
 491
 492 static int mdio_read(void __iomem *ioaddr, int reg_addr)
 493 {
 494         int i, value = -1;
 495
 496         RTL_W32(PHYAR, 0x0 | (reg_addr & 0xFF) << 16);
 497
 498         for (i = 20; i > 0; i--) {
 499                 /*
 500                  * Check if the RTL8169 has completed retrieving data from
 501                  * the specified MII register.
 502                  */
 503                 if (RTL_R32(PHYAR) & 0x80000000) {
 504                         value = (int) (RTL_R32(PHYAR) & 0xFFFF);
 505                         break;
 506                 }
 507                 udelay(25);
 508         }
 509         return value;
 510 }
 511
 512 static void rtl8169_irq_mask_and_ack(void __iomem *ioaddr)
 513 {
 514         RTL_W16(IntrMask, 0x0000);
 515
 516         RTL_W16(IntrStatus, 0xffff);
 517 }
 518
 519 static void rtl8169_asic_down(void __iomem *ioaddr)
 520 {
 521         RTL_W8(ChipCmd, 0x00);
 522         rtl8169_irq_mask_and_ack(ioaddr);
 523         RTL_R16(CPlusCmd);
 524 }
 525
 526 static unsigned int rtl8169_tbi_reset_pending(void __iomem *ioaddr)
 527 {
 528         return RTL_R32(TBICSR) & TBIReset;
 529 }
 530
 531 static unsigned int rtl8169_xmii_reset_pending(void __iomem *ioaddr)
 532 {
 533         return mdio_read(ioaddr, MII_BMCR) & BMCR_RESET;
 534 }
 535
 536 static unsigned int rtl8169_tbi_link_ok(void __iomem *ioaddr)
 537 {
 538         return RTL_R32(TBICSR) & TBILinkOk;
 539 }
 540
 541 static unsigned int rtl8169_xmii_link_ok(void __iomem *ioaddr)
 542 {
 543         return RTL_R8(PHYstatus) & LinkStatus;
 544 }
 545
 546 static void rtl8169_tbi_reset_enable(void __iomem *ioaddr)
 547 {
 548         RTL_W32(TBICSR, RTL_R32(TBICSR) | TBIReset);
 549 }
 550
 551 static void rtl8169_xmii_reset_enable(void __iomem *ioaddr)
 552 {
 553         unsigned int val;
 554
 555         val = mdio_read(ioaddr, MII_BMCR) | BMCR_RESET;
 556         mdio_write(ioaddr, MII_BMCR, val & 0xffff);
 557 }
 558
 559 static void rtl8169_check_link_status(struct net_device *dev,
 560                                       struct rtl8169_private *tp,
 561                                       void __iomem *ioaddr)
 562 {
 563         unsigned long flags;
 564
 565         spin_lock_irqsave(&tp->lock, flags);
 566         if (tp->link_ok(ioaddr)) {
 567                 netif_carrier_on(dev);
 568                 if (netif_msg_ifup(tp))
 569                         printk(KERN_INFO PFX "%s: link up\n", dev->name);
 570         } else {
 571                 if (netif_msg_ifdown(tp))
 572                         printk(KERN_INFO PFX "%s: link down\n", dev->name);
 573                 netif_carrier_off(dev);
 574         }
 575         spin_unlock_irqrestore(&tp->lock, flags);
 576 }
 577
 578 static void rtl8169_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 579 {
 580         struct rtl8169_private *tp = netdev_priv(dev);
 581         void __iomem *ioaddr = tp->mmio_addr;
 582         u8 options;
 583
 584         wol->wolopts = 0;
 585
 586 #define WAKE_ANY (WAKE_PHY | WAKE_MAGIC | WAKE_UCAST | WAKE_BCAST | WAKE_MCAST)
 587         wol->supported = WAKE_ANY;
 588
 589         spin_lock_irq(&tp->lock);
 590
 591         options = RTL_R8(Config1);
 592         if (!(options & PMEnable))
 593                 goto out_unlock;
 594
 595         options = RTL_R8(Config3);
 596         if (options & LinkUp)
 597                 wol->wolopts |= WAKE_PHY;
 598         if (options & MagicPacket)
 599                 wol->wolopts |= WAKE_MAGIC;
 600
 601         options = RTL_R8(Config5);
 602         if (options & UWF)
 603                 wol->wolopts |= WAKE_UCAST;
 604         if (options & BWF)
 605                 wol->wolopts |= WAKE_BCAST;
 606         if (options & MWF)
 607                 wol->wolopts |= WAKE_MCAST;
 608
 609 out_unlock:
 610         spin_unlock_irq(&tp->lock);
 611 }
 612
 613 static int rtl8169_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 614 {
 615         struct rtl8169_private *tp = netdev_priv(dev);
 616         void __iomem *ioaddr = tp->mmio_addr;
 617         unsigned int i;
 618         static struct {
 619                 u32 opt;
 620                 u16 reg;
 621                 u8  mask;
 622         } cfg[] = {
 623                 { WAKE_ANY,   Config1, PMEnable },
 624                 { WAKE_PHY,   Config3, LinkUp },
 625                 { WAKE_MAGIC, Config3, MagicPacket },
 626                 { WAKE_UCAST, Config5, UWF },
 627                 { WAKE_BCAST, Config5, BWF },
 628                 { WAKE_MCAST, Config5, MWF },
 629                 { WAKE_ANY,   Config5, LanWake }
 630         };
 631
 632         spin_lock_irq(&tp->lock);
 633
 634         RTL_W8(Cfg9346, Cfg9346_Unlock);
 635
 636         for (i = 0; i < ARRAY_SIZE(cfg); i++) {
 637                 u8 options = RTL_R8(cfg[i].reg) & ~cfg[i].mask;
 638                 if (wol->wolopts & cfg[i].opt)
 639                         options |= cfg[i].mask;
 640                 RTL_W8(cfg[i].reg, options);
 641         }
 642
 643         RTL_W8(Cfg9346, Cfg9346_Lock);
 644
 645         if (wol->wolopts)
 646                 tp->features |= RTL_FEATURE_WOL;
 647         else
 648                 tp->features &= ~RTL_FEATURE_WOL;
 649
 650         spin_unlock_irq(&tp->lock);
 651
 652         return 0;
 653 }
 654
 655 static void rtl8169_get_drvinfo(struct net_device *dev,
 656                                 struct ethtool_drvinfo *info)
 657 {
 658         struct rtl8169_private *tp = netdev_priv(dev);
 659
 660         strcpy(info->driver, MODULENAME);
 661         strcpy(info->version, RTL8169_VERSION);
 662         strcpy(info->bus_info, pci_name(tp->pci_dev));
 663 }
 664
 665 static int rtl8169_get_regs_len(struct net_device *dev)
 666 {
 667         return R8169_REGS_SIZE;
 668 }
 669
 670 static int rtl8169_set_speed_tbi(struct net_device *dev,
 671                                  u8 autoneg, u16 speed, u8 duplex)
 672 {
 673         struct rtl8169_private *tp = netdev_priv(dev);
 674         void __iomem *ioaddr = tp->mmio_addr;
 675         int ret = 0;
 676         u32 reg;
 677
 678         reg = RTL_R32(TBICSR);
 679         if ((autoneg == AUTONEG_DISABLE) && (speed == SPEED_1000) &&
 680             (duplex == DUPLEX_FULL)) {
 681                 RTL_W32(TBICSR, reg & ~(TBINwEnable | TBINwRestart));
 682         } else if (autoneg == AUTONEG_ENABLE)
 683                 RTL_W32(TBICSR, reg | TBINwEnable | TBINwRestart);
 684         else {
 685                 if (netif_msg_link(tp)) {
 686                         printk(KERN_WARNING "%s: "
 687                                "incorrect speed setting refused in TBI mode\n",
 688                                dev->name);
 689                 }
 690                 ret = -EOPNOTSUPP;
 691         }
 692
 693         return ret;
 694 }
 695
 696 static int rtl8169_set_speed_xmii(struct net_device *dev,
 697                                   u8 autoneg, u16 speed, u8 duplex)
 698 {
 699         struct rtl8169_private *tp = netdev_priv(dev);
 700         void __iomem *ioaddr = tp->mmio_addr;
 701         int auto_nego, giga_ctrl;
 702
 703         auto_nego = mdio_read(ioaddr, MII_ADVERTISE);
 704         auto_nego &= ~(ADVERTISE_10HALF | ADVERTISE_10FULL |
 705                        ADVERTISE_100HALF | ADVERTISE_100FULL);
 706         giga_ctrl = mdio_read(ioaddr, MII_CTRL1000);
 707         giga_ctrl &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 708
 709         if (autoneg == AUTONEG_ENABLE) {
 710                 auto_nego |= (ADVERTISE_10HALF | ADVERTISE_10FULL |
 711                               ADVERTISE_100HALF | ADVERTISE_100FULL);
 712                 giga_ctrl |= ADVERTISE_1000FULL | ADVERTISE_1000HALF;
 713         } else {
 714                 if (speed == SPEED_10)
 715                         auto_nego |= ADVERTISE_10HALF | ADVERTISE_10FULL;
 716                 else if (speed == SPEED_100)
 717                         auto_nego |= ADVERTISE_100HALF | ADVERTISE_100FULL;
 718                 else if (speed == SPEED_1000)
 719                         giga_ctrl |= ADVERTISE_1000FULL | ADVERTISE_1000HALF;
 720
 721                 if (duplex == DUPLEX_HALF)
 722                         auto_nego &= ~(ADVERTISE_10FULL | ADVERTISE_100FULL);
 723
 724                 if (duplex == DUPLEX_FULL)
 725                         auto_nego &= ~(ADVERTISE_10HALF | ADVERTISE_100HALF);
 726
 727                 /* This tweak comes straight from Realtek's driver. */
 728                 if ((speed == SPEED_100) && (duplex == DUPLEX_HALF) &&
 729                     ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
 730                      (tp->mac_version == RTL_GIGA_MAC_VER_16))) {
 731                         auto_nego = ADVERTISE_100HALF | ADVERTISE_CSMA;
 732                 }
 733         }
 734
 735         /* The 8100e/8101e do Fast Ethernet only. */
 736         if ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
 737             (tp->mac_version == RTL_GIGA_MAC_VER_14) ||
 738             (tp->mac_version == RTL_GIGA_MAC_VER_15) ||
 739             (tp->mac_version == RTL_GIGA_MAC_VER_16)) {
 740                 if ((giga_ctrl & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)) &&
 741                     netif_msg_link(tp)) {
 742                         printk(KERN_INFO "%s: PHY does not support 1000Mbps.\n",
 743                                dev->name);
 744                 }
 745                 giga_ctrl &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 746         }
 747
 748         auto_nego |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 749
 750         if ((tp->mac_version == RTL_GIGA_MAC_VER_12) ||
 751             (tp->mac_version == RTL_GIGA_MAC_VER_17)) {
 752                 /* Vendor specific (0x1f) and reserved (0x0e) MII registers. */
 753                 mdio_write(ioaddr, 0x1f, 0x0000);
 754                 mdio_write(ioaddr, 0x0e, 0x0000);
 755         }
 756
 757         tp->phy_auto_nego_reg = auto_nego;
 758         tp->phy_1000_ctrl_reg = giga_ctrl;
 759
 760         mdio_write(ioaddr, MII_ADVERTISE, auto_nego);
 761         mdio_write(ioaddr, MII_CTRL1000, giga_ctrl);
 762         mdio_write(ioaddr, MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
 763         return 0;
 764 }
 765
 766 static int rtl8169_set_speed(struct net_device *dev,
 767                              u8 autoneg, u16 speed, u8 duplex)
 768 {
 769         struct rtl8169_private *tp = netdev_priv(dev);
 770         int ret;
 771
 772         ret = tp->set_speed(dev, autoneg, speed, duplex);
 773
 774         if (netif_running(dev) && (tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL))
 775                 mod_timer(&tp->timer, jiffies + RTL8169_PHY_TIMEOUT);
 776
 777         return ret;
 778 }
 779
 780 static int rtl8169_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 781 {
 782         struct rtl8169_private *tp = netdev_priv(dev);
 783         unsigned long flags;
 784         int ret;
 785
 786         spin_lock_irqsave(&tp->lock, flags);
 787         ret = rtl8169_set_speed(dev, cmd->autoneg, cmd->speed, cmd->duplex);
 788         spin_unlock_irqrestore(&tp->lock, flags);
 789
 790         return ret;
 791 }
 792
 793 static u32 rtl8169_get_rx_csum(struct net_device *dev)
 794 {
 795         struct rtl8169_private *tp = netdev_priv(dev);
 796
 797         return tp->cp_cmd & RxChkSum;
 798 }
 799
 800 static int rtl8169_set_rx_csum(struct net_device *dev, u32 data)
 801 {
 802         struct rtl8169_private *tp = netdev_priv(dev);
 803         void __iomem *ioaddr = tp->mmio_addr;
 804         unsigned long flags;
 805
 806         spin_lock_irqsave(&tp->lock, flags);
 807
 808         if (data)
 809                 tp->cp_cmd |= RxChkSum;
 810         else
 811                 tp->cp_cmd &= ~RxChkSum;
 812
 813         RTL_W16(CPlusCmd, tp->cp_cmd);
 814         RTL_R16(CPlusCmd);
 815
 816         spin_unlock_irqrestore(&tp->lock, flags);
 817
 818         return 0;
 819 }
 820
 821 #ifdef CONFIG_R8169_VLAN
 822
 823 static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
 824                                       struct sk_buff *skb)
 825 {
 826         return (tp->vlgrp && vlan_tx_tag_present(skb)) ?
 827                 TxVlanTag | swab16(vlan_tx_tag_get(skb)) : 0x00;
 828 }
 829
 830 static void rtl8169_vlan_rx_register(struct net_device *dev,
 831                                      struct vlan_group *grp)
 832 {
 833         struct rtl8169_private *tp = netdev_priv(dev);
 834         void __iomem *ioaddr = tp->mmio_addr;
 835         unsigned long flags;
 836
 837         spin_lock_irqsave(&tp->lock, flags);
 838         tp->vlgrp = grp;
 839         if (tp->vlgrp)
 840                 tp->cp_cmd |= RxVlan;
 841         else
 842                 tp->cp_cmd &= ~RxVlan;
 843         RTL_W16(CPlusCmd, tp->cp_cmd);
 844         RTL_R16(CPlusCmd);
 845         spin_unlock_irqrestore(&tp->lock, flags);
 846 }
 847
 848 static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc,
 849                                struct sk_buff *skb)
 850 {
 851         u32 opts2 = le32_to_cpu(desc->opts2);
 852         int ret;
 853
 854         if (tp->vlgrp && (opts2 & RxVlanTag)) {
 855                 rtl8169_rx_hwaccel_skb(skb, tp->vlgrp, swab16(opts2 & 0xffff));
 856                 ret = 0;
 857         } else
 858                 ret = -1;
 859         desc->opts2 = 0;
 860         return ret;
 861 }
 862
 863 #else /* !CONFIG_R8169_VLAN */
 864
 865 static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
 866                                       struct sk_buff *skb)
 867 {
 868         return 0;
 869 }
 870
 871 static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc,
 872                                struct sk_buff *skb)
 873 {
 874         return -1;
 875 }
 876
 877 #endif
 878
 879 static void rtl8169_gset_tbi(struct net_device *dev, struct ethtool_cmd *cmd)
 880 {
 881         struct rtl8169_private *tp = netdev_priv(dev);
 882         void __iomem *ioaddr = tp->mmio_addr;
 883         u32 status;
 884
 885         cmd->supported =
 886                 SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE;
 887         cmd->port = PORT_FIBRE;
 888         cmd->transceiver = XCVR_INTERNAL;
 889
 890         status = RTL_R32(TBICSR);
 891         cmd->advertising = (status & TBINwEnable) ?  ADVERTISED_Autoneg : 0;
 892         cmd->autoneg = !!(status & TBINwEnable);
 893
 894         cmd->speed = SPEED_1000;
 895         cmd->duplex = DUPLEX_FULL; /* Always set */
 896 }
 897
 898 static void rtl8169_gset_xmii(struct net_device *dev, struct ethtool_cmd *cmd)
 899 {
 900         struct rtl8169_private *tp = netdev_priv(dev);
 901         void __iomem *ioaddr = tp->mmio_addr;
 902         u8 status;
 903
 904         cmd->supported = SUPPORTED_10baseT_Half |
 905                          SUPPORTED_10baseT_Full |
 906                          SUPPORTED_100baseT_Half |
 907                          SUPPORTED_100baseT_Full |
 908                          SUPPORTED_1000baseT_Full |
 909                          SUPPORTED_Autoneg |
 910                          SUPPORTED_TP;
 911
 912         cmd->autoneg = 1;
 913         cmd->advertising = ADVERTISED_TP | ADVERTISED_Autoneg;
 914
 915         if (tp->phy_auto_nego_reg & ADVERTISE_10HALF)
 916                 cmd->advertising |= ADVERTISED_10baseT_Half;
 917         if (tp->phy_auto_nego_reg & ADVERTISE_10FULL)
 918                 cmd->advertising |= ADVERTISED_10baseT_Full;
 919         if (tp->phy_auto_nego_reg & ADVERTISE_100HALF)
 920                 cmd->advertising |= ADVERTISED_100baseT_Half;
 921         if (tp->phy_auto_nego_reg & ADVERTISE_100FULL)
 922                 cmd->advertising |= ADVERTISED_100baseT_Full;
 923         if (tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL)
 924                 cmd->advertising |= ADVERTISED_1000baseT_Full;
 925
 926         status = RTL_R8(PHYstatus);
 927
 928         if (status & _1000bpsF)
 929                 cmd->speed = SPEED_1000;
 930         else if (status & _100bps)
 931                 cmd->speed = SPEED_100;
 932         else if (status & _10bps)
 933                 cmd->speed = SPEED_10;
 934
 935         if (status & TxFlowCtrl)
 936                 cmd->advertising |= ADVERTISED_Asym_Pause;
 937         if (status & RxFlowCtrl)
 938                 cmd->advertising |= ADVERTISED_Pause;
 939
 940         cmd->duplex = ((status & _1000bpsF) || (status & FullDup)) ?
 941                       DUPLEX_FULL : DUPLEX_HALF;
 942 }
 943
 944 static int rtl8169_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 945 {
 946         struct rtl8169_private *tp = netdev_priv(dev);
 947         unsigned long flags;
 948
 949         spin_lock_irqsave(&tp->lock, flags);
 950
 951         tp->get_settings(dev, cmd);
 952
 953         spin_unlock_irqrestore(&tp->lock, flags);
 954         return 0;
 955 }
 956
 957 static void rtl8169_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 958                              void *p)
 959 {
 960         struct rtl8169_private *tp = netdev_priv(dev);
 961         unsigned long flags;
 962
 963         if (regs->len > R8169_REGS_SIZE)
 964                 regs->len = R8169_REGS_SIZE;
 965
 966         spin_lock_irqsave(&tp->lock, flags);
 967         memcpy_fromio(p, tp->mmio_addr, regs->len);
 968         spin_unlock_irqrestore(&tp->lock, flags);
 969 }
 970
 971 static u32 rtl8169_get_msglevel(struct net_device *dev)
 972 {
 973         struct rtl8169_private *tp = netdev_priv(dev);
 974
 975         return tp->msg_enable;
 976 }
 977
 978 static void rtl8169_set_msglevel(struct net_device *dev, u32 value)
 979 {
 980         struct rtl8169_private *tp = netdev_priv(dev);
 981
 982         tp->msg_enable = value;
 983 }
 984
 985 static const char rtl8169_gstrings[][ETH_GSTRING_LEN] = {
 986         "tx_packets",
 987         "rx_packets",
 988         "tx_errors",
 989         "rx_errors",
 990         "rx_missed",
 991         "align_errors",
 992         "tx_single_collisions",
 993         "tx_multi_collisions",
 994         "unicast",
 995         "broadcast",
 996         "multicast",
 997         "tx_aborted",
 998         "tx_underrun",
 999 };
1000
1001 struct rtl8169_counters {
1002         __le64  tx_packets;
1003         __le64  rx_packets;
1004         __le64  tx_errors;
1005         __le32  rx_errors;
1006         __le16  rx_missed;
1007         __le16  align_errors;
1008         __le32  tx_one_collision;
1009         __le32  tx_multi_collision;
1010         __le64  rx_unicast;
1011         __le64  rx_broadcast;
1012         __le32  rx_multicast;
1013         __le16  tx_aborted;
1014         __le16  tx_underun;
1015 };
1016
1017 static int rtl8169_get_sset_count(struct net_device *dev, int sset)
1018 {
1019         switch (sset) {
1020         case ETH_SS_STATS:
1021                 return ARRAY_SIZE(rtl8169_gstrings);
1022         default:
1023                 return -EOPNOTSUPP;
1024         }
1025 }
1026
1027 static void rtl8169_get_ethtool_stats(struct net_device *dev,
1028                                       struct ethtool_stats *stats, u64 *data)
1029 {
1030         struct rtl8169_private *tp = netdev_priv(dev);
1031         void __iomem *ioaddr = tp->mmio_addr;
1032         struct rtl8169_counters *counters;
1033         dma_addr_t paddr;
1034         u32 cmd;
1035
1036         ASSERT_RTNL();
1037
1038         counters = pci_alloc_consistent(tp->pci_dev, sizeof(*counters), &paddr);
1039         if (!counters)
1040                 return;
1041
1042         RTL_W32(CounterAddrHigh, (u64)paddr >> 32);
1043         cmd = (u64)paddr & DMA_32BIT_MASK;
1044         RTL_W32(CounterAddrLow, cmd);
1045         RTL_W32(CounterAddrLow, cmd | CounterDump);
1046
1047         while (RTL_R32(CounterAddrLow) & CounterDump) {
1048                 if (msleep_interruptible(1))
1049                         break;
1050         }
1051
1052         RTL_W32(CounterAddrLow, 0);
1053         RTL_W32(CounterAddrHigh, 0);
1054
1055         data[0] = le64_to_cpu(counters->tx_packets);
1056         data[1] = le64_to_cpu(counters->rx_packets);
1057         data[2] = le64_to_cpu(counters->tx_errors);
1058         data[3] = le32_to_cpu(counters->rx_errors);
1059         data[4] = le16_to_cpu(counters->rx_missed);
1060         data[5] = le16_to_cpu(counters->align_errors);
1061         data[6] = le32_to_cpu(counters->tx_one_collision);
1062         data[7] = le32_to_cpu(counters->tx_multi_collision);
1063         data[8] = le64_to_cpu(counters->rx_unicast);
1064         data[9] = le64_to_cpu(counters->rx_broadcast);
1065         data[10] = le32_to_cpu(counters->rx_multicast);
1066         data[11] = le16_to_cpu(counters->tx_aborted);
1067         data[12] = le16_to_cpu(counters->tx_underun);
1068
1069         pci_free_consistent(tp->pci_dev, sizeof(*counters), counters, paddr);
1070 }
1071
1072 static void rtl8169_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1073 {
1074         switch(stringset) {
1075         case ETH_SS_STATS:
1076                 memcpy(data, *rtl8169_gstrings, sizeof(rtl8169_gstrings));
1077                 break;
1078         }
1079 }
1080
1081 static const struct ethtool_ops rtl8169_ethtool_ops = {
1082         .get_drvinfo            = rtl8169_get_drvinfo,
1083         .get_regs_len           = rtl8169_get_regs_len,
1084         .get_link               = ethtool_op_get_link,
1085         .get_settings           = rtl8169_get_settings,
1086         .set_settings           = rtl8169_set_settings,
1087         .get_msglevel           = rtl8169_get_msglevel,
1088         .set_msglevel           = rtl8169_set_msglevel,
1089         .get_rx_csum            = rtl8169_get_rx_csum,
1090         .set_rx_csum            = rtl8169_set_rx_csum,
1091         .set_tx_csum            = ethtool_op_set_tx_csum,
1092         .set_sg                 = ethtool_op_set_sg,
1093         .set_tso                = ethtool_op_set_tso,
1094         .get_regs               = rtl8169_get_regs,
1095         .get_wol                = rtl8169_get_wol,
1096         .set_wol                = rtl8169_set_wol,
1097         .get_strings            = rtl8169_get_strings,
1098         .get_sset_count         = rtl8169_get_sset_count,
1099         .get_ethtool_stats      = rtl8169_get_ethtool_stats,
1100 };
1101
1102 static void rtl8169_write_gmii_reg_bit(void __iomem *ioaddr, int reg,
1103                                        int bitnum, int bitval)
1104 {
1105         int val;
1106
1107         val = mdio_read(ioaddr, reg);
1108         val = (bitval == 1) ?
1109                 val | (bitval << bitnum) :  val & ~(0x0001 << bitnum);
1110         mdio_write(ioaddr, reg, val & 0xffff);
1111 }
1112
1113 static void rtl8169_get_mac_version(struct rtl8169_private *tp,
1114                                     void __iomem *ioaddr)
1115 {
1116         /*
1117          * The driver currently handles the 8168Bf and the 8168Be identically
1118          * but they can be identified more specifically through the test below
1119          * if needed:
1120          *
1121          * (RTL_R32(TxConfig) & 0x700000) == 0x500000 ? 8168Bf : 8168Be
1122          *
1123          * Same thing for the 8101Eb and the 8101Ec:
1124          *
1125          * (RTL_R32(TxConfig) & 0x700000) == 0x200000 ? 8101Eb : 8101Ec
1126          */
1127         const struct {
1128                 u32 mask;
1129                 u32 val;
1130                 int mac_version;
1131         } mac_info[] = {
1132                 /* 8168B family. */
1133                 { 0x7c800000, 0x3c800000,       RTL_GIGA_MAC_VER_18 },
1134                 { 0x7cf00000, 0x3c000000,       RTL_GIGA_MAC_VER_19 },
1135                 { 0x7cf00000, 0x3c200000,       RTL_GIGA_MAC_VER_20 },
1136                 { 0x7c800000, 0x3c000000,       RTL_GIGA_MAC_VER_20 },
1137
1138                 /* 8168B family. */
1139                 { 0x7cf00000, 0x38000000,       RTL_GIGA_MAC_VER_12 },
1140                 { 0x7cf00000, 0x38500000,       RTL_GIGA_MAC_VER_17 },
1141                 { 0x7c800000, 0x38000000,       RTL_GIGA_MAC_VER_17 },
1142                 { 0x7c800000, 0x30000000,       RTL_GIGA_MAC_VER_11 },
1143
1144                 /* 8101 family. */
1145                 { 0x7cf00000, 0x34000000,       RTL_GIGA_MAC_VER_13 },
1146                 { 0x7cf00000, 0x34200000,       RTL_GIGA_MAC_VER_16 },
1147                 { 0x7c800000, 0x34000000,       RTL_GIGA_MAC_VER_16 },
1148                 /* FIXME: where did these entries come from ? -- FR */
1149                 { 0xfc800000, 0x38800000,       RTL_GIGA_MAC_VER_15 },
1150                 { 0xfc800000, 0x30800000,       RTL_GIGA_MAC_VER_14 },
1151
1152                 /* 8110 family. */
1153                 { 0xfc800000, 0x98000000,       RTL_GIGA_MAC_VER_06 },
1154                 { 0xfc800000, 0x18000000,       RTL_GIGA_MAC_VER_05 },
1155                 { 0xfc800000, 0x10000000,       RTL_GIGA_MAC_VER_04 },
1156                 { 0xfc800000, 0x04000000,       RTL_GIGA_MAC_VER_03 },
1157                 { 0xfc800000, 0x00800000,       RTL_GIGA_MAC_VER_02 },
1158                 { 0xfc800000, 0x00000000,       RTL_GIGA_MAC_VER_01 },
1159
1160                 { 0x00000000, 0x00000000,       RTL_GIGA_MAC_VER_01 }   /* Catch-all */
1161         }, *p = mac_info;
1162         u32 reg;
1163
1164         reg = RTL_R32(TxConfig);
1165         while ((reg & p->mask) != p->val)
1166                 p++;
1167         tp->mac_version = p->mac_version;
1168
1169         if (p->mask == 0x00000000) {
1170                 struct pci_dev *pdev = tp->pci_dev;
1171
1172                 dev_info(&pdev->dev, "unknown MAC (%08x)\n", reg);
1173         }
1174 }
1175
1176 static void rtl8169_print_mac_version(struct rtl8169_private *tp)
1177 {
1178         dprintk("mac_version = 0x%02x\n", tp->mac_version);
1179 }
1180
1181 static void rtl8169_get_phy_version(struct rtl8169_private *tp,
1182                                     void __iomem *ioaddr)
1183 {
1184         const struct {
1185                 u16 mask;
1186                 u16 set;
1187                 int phy_version;
1188         } phy_info[] = {
1189                 { 0x000f, 0x0002, RTL_GIGA_PHY_VER_G },
1190                 { 0x000f, 0x0001, RTL_GIGA_PHY_VER_F },
1191                 { 0x000f, 0x0000, RTL_GIGA_PHY_VER_E },
1192                 { 0x0000, 0x0000, RTL_GIGA_PHY_VER_D } /* Catch-all */
1193         }, *p = phy_info;
1194         u16 reg;
1195
1196         reg = mdio_read(ioaddr, MII_PHYSID2) & 0xffff;
1197         while ((reg & p->mask) != p->set)
1198                 p++;
1199         tp->phy_version = p->phy_version;
1200 }
1201
1202 static void rtl8169_print_phy_version(struct rtl8169_private *tp)
1203 {
1204         struct {
1205                 int version;
1206                 char *msg;
1207                 u32 reg;
1208         } phy_print[] = {
1209                 { RTL_GIGA_PHY_VER_G, "RTL_GIGA_PHY_VER_G", 0x0002 },
1210                 { RTL_GIGA_PHY_VER_F, "RTL_GIGA_PHY_VER_F", 0x0001 },
1211                 { RTL_GIGA_PHY_VER_E, "RTL_GIGA_PHY_VER_E", 0x0000 },
1212                 { RTL_GIGA_PHY_VER_D, "RTL_GIGA_PHY_VER_D", 0x0000 },
1213                 { 0, NULL, 0x0000 }
1214         }, *p;
1215
1216         for (p = phy_print; p->msg; p++) {
1217                 if (tp->phy_version == p->version) {
1218                         dprintk("phy_version == %s (%04x)\n", p->msg, p->reg);
1219                         return;
1220                 }
1221         }
1222         dprintk("phy_version == Unknown\n");
1223 }
1224
1225 static void rtl8169_hw_phy_config(struct net_device *dev)
1226 {
1227         struct rtl8169_private *tp = netdev_priv(dev);
1228         void __iomem *ioaddr = tp->mmio_addr;
1229         struct {
1230                 u16 regs[5]; /* Beware of bit-sign propagation */
1231         } phy_magic[5] = { {
1232                 { 0x0000,       //w 4 15 12 0
1233                   0x00a1,       //w 3 15 0 00a1
1234                   0x0008,       //w 2 15 0 0008
1235                   0x1020,       //w 1 15 0 1020
1236                   0x1000 } },{  //w 0 15 0 1000
1237                 { 0x7000,       //w 4 15 12 7
1238                   0xff41,       //w 3 15 0 ff41
1239                   0xde60,       //w 2 15 0 de60
1240                   0x0140,       //w 1 15 0 0140
1241                   0x0077 } },{  //w 0 15 0 0077
1242                 { 0xa000,       //w 4 15 12 a
1243                   0xdf01,       //w 3 15 0 df01
1244                   0xdf20,       //w 2 15 0 df20
1245                   0xff95,       //w 1 15 0 ff95
1246                   0xfa00 } },{  //w 0 15 0 fa00
1247                 { 0xb000,       //w 4 15 12 b
1248                   0xff41,       //w 3 15 0 ff41
1249                   0xde20,       //w 2 15 0 de20
1250                   0x0140,       //w 1 15 0 0140
1251                   0x00bb } },{  //w 0 15 0 00bb
1252                 { 0xf000,       //w 4 15 12 f
1253                   0xdf01,       //w 3 15 0 df01
1254                   0xdf20,       //w 2 15 0 df20
1255                   0xff95,       //w 1 15 0 ff95
1256                   0xbf00 }      //w 0 15 0 bf00
1257                 }
1258         }, *p = phy_magic;
1259         unsigned int i;
1260
1261         rtl8169_print_mac_version(tp);
1262         rtl8169_print_phy_version(tp);
1263
1264         if (tp->mac_version <= RTL_GIGA_MAC_VER_01)
1265                 return;
1266         if (tp->phy_version >= RTL_GIGA_PHY_VER_H)
1267                 return;
1268
1269         dprintk("MAC version != 0 && PHY version == 0 or 1\n");
1270         dprintk("Do final_reg2.cfg\n");
1271
1272         /* Shazam ! */
1273
1274         if (tp->mac_version == RTL_GIGA_MAC_VER_04) {
1275                 mdio_write(ioaddr, 31, 0x0002);
1276                 mdio_write(ioaddr,  1, 0x90d0);
1277                 mdio_write(ioaddr, 31, 0x0000);
1278                 return;
1279         }
1280
1281         if ((tp->mac_version != RTL_GIGA_MAC_VER_02) &&
1282             (tp->mac_version != RTL_GIGA_MAC_VER_03))
1283                 return;
1284
1285         mdio_write(ioaddr, 31, 0x0001);                 //w 31 2 0 1
1286         mdio_write(ioaddr, 21, 0x1000);                 //w 21 15 0 1000
1287         mdio_write(ioaddr, 24, 0x65c7);                 //w 24 15 0 65c7
1288         rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0);   //w 4 11 11 0
1289
1290         for (i = 0; i < ARRAY_SIZE(phy_magic); i++, p++) {
1291                 int val, pos = 4;
1292
1293                 val = (mdio_read(ioaddr, pos) & 0x0fff) | (p->regs[0] & 0xffff);
1294                 mdio_write(ioaddr, pos, val);
1295                 while (--pos >= 0)
1296                         mdio_write(ioaddr, pos, p->regs[4 - pos] & 0xffff);
1297                 rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 1); //w 4 11 11 1
1298                 rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0); //w 4 11 11 0
1299         }
1300         mdio_write(ioaddr, 31, 0x0000); //w 31 2 0 0
1301 }
1302
1303 static void rtl8169_phy_timer(unsigned long __opaque)
1304 {
1305         struct net_device *dev = (struct net_device *)__opaque;
1306         struct rtl8169_private *tp = netdev_priv(dev);
1307         struct timer_list *timer = &tp->timer;
1308         void __iomem *ioaddr = tp->mmio_addr;
1309         unsigned long timeout = RTL8169_PHY_TIMEOUT;
1310
1311         assert(tp->mac_version > RTL_GIGA_MAC_VER_01);
1312         assert(tp->phy_version < RTL_GIGA_PHY_VER_H);
1313
1314         if (!(tp->phy_1000_ctrl_reg & ADVERTISE_1000FULL))
1315                 return;
1316
1317         spin_lock_irq(&tp->lock);
1318
1319         if (tp->phy_reset_pending(ioaddr)) {
1320                 /*
1321                  * A busy loop could burn quite a few cycles on nowadays CPU.
1322                  * Let's delay the execution of the timer for a few ticks.
1323                  */
1324                 timeout = HZ/10;
1325                 goto out_mod_timer;
1326         }
1327
1328         if (tp->link_ok(ioaddr))
1329                 goto out_unlock;
1330
1331         if (netif_msg_link(tp))
1332                 printk(KERN_WARNING "%s: PHY reset until link up\n", dev->name);
1333
1334         tp->phy_reset_enable(ioaddr);
1335
1336 out_mod_timer:
1337         mod_timer(timer, jiffies + timeout);
1338 out_unlock:
1339         spin_unlock_irq(&tp->lock);
1340 }
1341
1342 static inline void rtl8169_delete_timer(struct net_device *dev)
1343 {
1344         struct rtl8169_private *tp = netdev_priv(dev);
1345         struct timer_list *timer = &tp->timer;
1346
1347         if ((tp->mac_version <= RTL_GIGA_MAC_VER_01) ||
1348             (tp->phy_version >= RTL_GIGA_PHY_VER_H))
1349                 return;
1350
1351         del_timer_sync(timer);
1352 }
1353
1354 static inline void rtl8169_request_timer(struct net_device *dev)
1355 {
1356         struct rtl8169_private *tp = netdev_priv(dev);
1357         struct timer_list *timer = &tp->timer;
1358
1359         if ((tp->mac_version <= RTL_GIGA_MAC_VER_01) ||
1360             (tp->phy_version >= RTL_GIGA_PHY_VER_H))
1361                 return;
1362
1363         mod_timer(timer, jiffies + RTL8169_PHY_TIMEOUT);
1364 }
1365
1366 #ifdef CONFIG_NET_POLL_CONTROLLER
1367 /*
1368  * Polling 'interrupt' - used by things like netconsole to send skbs
1369  * without having to re-enable interrupts. It's not called while
1370  * the interrupt routine is executing.
1371  */
1372 static void rtl8169_netpoll(struct net_device *dev)
1373 {
1374         struct rtl8169_private *tp = netdev_priv(dev);
1375         struct pci_dev *pdev = tp->pci_dev;
1376
1377         disable_irq(pdev->irq);
1378         rtl8169_interrupt(pdev->irq, dev);
1379         enable_irq(pdev->irq);
1380 }
1381 #endif
1382
1383 static void rtl8169_release_board(struct pci_dev *pdev, struct net_device *dev,
1384                                   void __iomem *ioaddr)
1385 {
1386         iounmap(ioaddr);
1387         pci_release_regions(pdev);
1388         pci_disable_device(pdev);
1389         free_netdev(dev);
1390 }
1391
1392 static void rtl8169_phy_reset(struct net_device *dev,
1393                               struct rtl8169_private *tp)
1394 {
1395         void __iomem *ioaddr = tp->mmio_addr;
1396         unsigned int i;
1397
1398         tp->phy_reset_enable(ioaddr);
1399         for (i = 0; i < 100; i++) {
1400                 if (!tp->phy_reset_pending(ioaddr))
1401                         return;
1402                 msleep(1);
1403         }
1404         if (netif_msg_link(tp))
1405                 printk(KERN_ERR "%s: PHY reset failed.\n", dev->name);
1406 }
1407
1408 static void rtl8169_init_phy(struct net_device *dev, struct rtl8169_private *tp)
1409 {
1410         void __iomem *ioaddr = tp->mmio_addr;
1411
1412         rtl8169_hw_phy_config(dev);
1413
1414         dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
1415         RTL_W8(0x82, 0x01);
1416
1417         pci_write_config_byte(tp->pci_dev, PCI_LATENCY_TIMER, 0x40);
1418
1419         if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
1420                 pci_write_config_byte(tp->pci_dev, PCI_CACHE_LINE_SIZE, 0x08);
1421
1422         if (tp->mac_version == RTL_GIGA_MAC_VER_02) {
1423                 dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
1424                 RTL_W8(0x82, 0x01);
1425                 dprintk("Set PHY Reg 0x0bh = 0x00h\n");
1426                 mdio_write(ioaddr, 0x0b, 0x0000); //w 0x0b 15 0 0
1427         }
1428
1429         rtl8169_phy_reset(dev, tp);
1430
1431         /*
1432          * rtl8169_set_speed_xmii takes good care of the Fast Ethernet
1433          * only 8101. Don't panic.
1434          */
1435         rtl8169_set_speed(dev, AUTONEG_ENABLE, SPEED_1000, DUPLEX_FULL);
1436
1437         if ((RTL_R8(PHYstatus) & TBI_Enable) && netif_msg_link(tp))
1438                 printk(KERN_INFO PFX "%s: TBI auto-negotiating\n", dev->name);
1439 }
1440
1441 static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr)
1442 {
1443         void __iomem *ioaddr = tp->mmio_addr;
1444         u32 high;
1445         u32 low;
1446
1447         low  = addr[0] | (addr[1] << 8) | (addr[2] << 16) | (addr[3] << 24);
1448         high = addr[4] | (addr[5] << 8);
1449
1450         spin_lock_irq(&tp->lock);
1451
1452         RTL_W8(Cfg9346, Cfg9346_Unlock);
1453         RTL_W32(MAC0, low);
1454         RTL_W32(MAC4, high);
1455         RTL_W8(Cfg9346, Cfg9346_Lock);
1456
1457         spin_unlock_irq(&tp->lock);
1458 }
1459
1460 static int rtl_set_mac_address(struct net_device *dev, void *p)
1461 {
1462         struct rtl8169_private *tp = netdev_priv(dev);
1463         struct sockaddr *addr = p;
1464
1465         if (!is_valid_ether_addr(addr->sa_data))
1466                 return -EADDRNOTAVAIL;
1467
1468         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1469
1470         rtl_rar_set(tp, dev->dev_addr);
1471
1472         return 0;
1473 }
1474
1475 static int rtl8169_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1476 {
1477         struct rtl8169_private *tp = netdev_priv(dev);
1478         struct mii_ioctl_data *data = if_mii(ifr);
1479
1480         if (!netif_running(dev))
1481                 return -ENODEV;
1482
1483         switch (cmd) {
1484         case SIOCGMIIPHY:
1485                 data->phy_id = 32; /* Internal PHY */
1486                 return 0;
1487
1488         case SIOCGMIIREG:
1489                 data->val_out = mdio_read(tp->mmio_addr, data->reg_num & 0x1f);
1490                 return 0;
1491
1492         case SIOCSMIIREG:
1493                 if (!capable(CAP_NET_ADMIN))
1494                         return -EPERM;
1495                 mdio_write(tp->mmio_addr, data->reg_num & 0x1f, data->val_in);
1496                 return 0;
1497         }
1498         return -EOPNOTSUPP;
1499 }
1500
1501 static const struct rtl_cfg_info {
1502         void (*hw_start)(struct net_device *);
1503         unsigned int region;
1504         unsigned int align;
1505         u16 intr_event;
1506         u16 napi_event;
1507         unsigned msi;
1508 } rtl_cfg_infos [] = {
1509         [RTL_CFG_0] = {
1510                 .hw_start       = rtl_hw_start_8169,
1511                 .region         = 1,
1512                 .align          = 0,
1513                 .intr_event     = SYSErr | LinkChg | RxOverflow |
1514                                   RxFIFOOver | TxErr | TxOK | RxOK | RxErr,
1515                 .napi_event     = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow,
1516                 .msi            = 0
1517         },
1518         [RTL_CFG_1] = {
1519                 .hw_start       = rtl_hw_start_8168,
1520                 .region         = 2,
1521                 .align          = 8,
1522                 .intr_event     = SYSErr | LinkChg | RxOverflow |
1523                                   TxErr | TxOK | RxOK | RxErr,
1524                 .napi_event     = TxErr | TxOK | RxOK | RxOverflow,
1525                 .msi            = RTL_FEATURE_MSI
1526         },
1527         [RTL_CFG_2] = {
1528                 .hw_start       = rtl_hw_start_8101,
1529                 .region         = 2,
1530                 .align          = 8,
1531                 .intr_event     = SYSErr | LinkChg | RxOverflow | PCSTimeout |
1532                                   RxFIFOOver | TxErr | TxOK | RxOK | RxErr,
1533                 .napi_event     = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow,
1534                 .msi            = RTL_FEATURE_MSI
1535         }
1536 };
1537
1538 /* Cfg9346_Unlock assumed. */
1539 static unsigned rtl_try_msi(struct pci_dev *pdev, void __iomem *ioaddr,
1540                             const struct rtl_cfg_info *cfg)
1541 {
1542         unsigned msi = 0;
1543         u8 cfg2;
1544
1545         cfg2 = RTL_R8(Config2) & ~MSIEnable;
1546         if (cfg->msi) {
1547                 if (pci_enable_msi(pdev)) {
1548                         dev_info(&pdev->dev, "no MSI. Back to INTx.\n");
1549                 } else {
1550                         cfg2 |= MSIEnable;
1551                         msi = RTL_FEATURE_MSI;
1552                 }
1553         }
1554         RTL_W8(Config2, cfg2);
1555         return msi;
1556 }
1557
1558 static void rtl_disable_msi(struct pci_dev *pdev, struct rtl8169_private *tp)
1559 {
1560         if (tp->features & RTL_FEATURE_MSI) {
1561                 pci_disable_msi(pdev);
1562                 tp->features &= ~RTL_FEATURE_MSI;
1563         }
1564 }
1565
1566 static int __devinit
1567 rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1568 {
1569         const struct rtl_cfg_info *cfg = rtl_cfg_infos + ent->driver_data;
1570         const unsigned int region = cfg->region;
1571         struct rtl8169_private *tp;
1572         struct net_device *dev;
1573         void __iomem *ioaddr;
1574         unsigned int i;
1575         int rc;
1576
1577         if (netif_msg_drv(&debug)) {
1578                 printk(KERN_INFO "%s Gigabit Ethernet driver %s loaded\n",
1579                        MODULENAME, RTL8169_VERSION);
1580         }
1581
1582         dev = alloc_etherdev(sizeof (*tp));
1583         if (!dev) {
1584                 if (netif_msg_drv(&debug))
1585                         dev_err(&pdev->dev, "unable to alloc new ethernet\n");
1586                 rc = -ENOMEM;
1587                 goto out;
1588         }
1589
1590         SET_NETDEV_DEV(dev, &pdev->dev);
1591         tp = netdev_priv(dev);
1592         tp->dev = dev;
1593         tp->msg_enable = netif_msg_init(debug.msg_enable, R8169_MSG_DEFAULT);
1594
1595         /* enable device (incl. PCI PM wakeup and hotplug setup) */
1596         rc = pci_enable_device(pdev);
1597         if (rc < 0) {
1598                 if (netif_msg_probe(tp))
1599                         dev_err(&pdev->dev, "enable failure\n");
1600                 goto err_out_free_dev_1;
1601         }
1602
1603         rc = pci_set_mwi(pdev);
1604         if (rc < 0)
1605                 goto err_out_disable_2;
1606
1607         /* make sure PCI base addr 1 is MMIO */
1608         if (!(pci_resource_flags(pdev, region) & IORESOURCE_MEM)) {
1609                 if (netif_msg_probe(tp)) {
1610                         dev_err(&pdev->dev,
1611                                 "region #%d not an MMIO resource, aborting\n",
1612                                 region);
1613                 }
1614                 rc = -ENODEV;
1615                 goto err_out_mwi_3;
1616         }
1617
1618         /* check for weird/broken PCI region reporting */
1619         if (pci_resource_len(pdev, region) < R8169_REGS_SIZE) {
1620                 if (netif_msg_probe(tp)) {
1621                         dev_err(&pdev->dev,
1622                                 "Invalid PCI region size(s), aborting\n");
1623                 }
1624                 rc = -ENODEV;
1625                 goto err_out_mwi_3;
1626         }
1627
1628         rc = pci_request_regions(pdev, MODULENAME);
1629         if (rc < 0) {
1630                 if (netif_msg_probe(tp))
1631                         dev_err(&pdev->dev, "could not request regions.\n");
1632                 goto err_out_mwi_3;
1633         }
1634
1635         tp->cp_cmd = PCIMulRW | RxChkSum;
1636
1637         if ((sizeof(dma_addr_t) > 4) &&
1638             !pci_set_dma_mask(pdev, DMA_64BIT_MASK) && use_dac) {
1639                 tp->cp_cmd |= PCIDAC;
1640                 dev->features |= NETIF_F_HIGHDMA;
1641         } else {
1642                 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1643                 if (rc < 0) {
1644                         if (netif_msg_probe(tp)) {
1645                                 dev_err(&pdev->dev,
1646                                         "DMA configuration failed.\n");
1647                         }
1648                         goto err_out_free_res_4;
1649                 }
1650         }
1651
1652         pci_set_master(pdev);
1653
1654         /* ioremap MMIO region */
1655         ioaddr = ioremap(pci_resource_start(pdev, region), R8169_REGS_SIZE);
1656         if (!ioaddr) {
1657                 if (netif_msg_probe(tp))
1658                         dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
1659                 rc = -EIO;
1660                 goto err_out_free_res_4;
1661         }
1662
1663         /* Unneeded ? Don't mess with Mrs. Murphy. */
1664         rtl8169_irq_mask_and_ack(ioaddr);
1665
1666         /* Soft reset the chip. */
1667         RTL_W8(ChipCmd, CmdReset);
1668
1669         /* Check that the chip has finished the reset. */
1670         for (i = 0; i < 100; i++) {
1671                 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
1672                         break;
1673                 msleep_interruptible(1);
1674         }
1675
1676         /* Identify chip attached to board */
1677         rtl8169_get_mac_version(tp, ioaddr);
1678         rtl8169_get_phy_version(tp, ioaddr);
1679
1680         rtl8169_print_mac_version(tp);
1681         rtl8169_print_phy_version(tp);
1682
1683         for (i = ARRAY_SIZE(rtl_chip_info) - 1; i >= 0; i--) {
1684                 if (tp->mac_version == rtl_chip_info[i].mac_version)
1685                         break;
1686         }
1687         if (i < 0) {
1688                 /* Unknown chip: assume array element #0, original RTL-8169 */
1689                 if (netif_msg_probe(tp)) {
1690                         dev_printk(KERN_DEBUG, &pdev->dev,
1691                                 "unknown chip version, assuming %s\n",
1692                                 rtl_chip_info[0].name);
1693                 }
1694                 i++;
1695         }
1696         tp->chipset = i;
1697
1698         RTL_W8(Cfg9346, Cfg9346_Unlock);
1699         RTL_W8(Config1, RTL_R8(Config1) | PMEnable);
1700         RTL_W8(Config5, RTL_R8(Config5) & PMEStatus);
1701         tp->features |= rtl_try_msi(pdev, ioaddr, cfg);
1702         RTL_W8(Cfg9346, Cfg9346_Lock);
1703
1704         if (RTL_R8(PHYstatus) & TBI_Enable) {
1705                 tp->set_speed = rtl8169_set_speed_tbi;
1706                 tp->get_settings = rtl8169_gset_tbi;
1707                 tp->phy_reset_enable = rtl8169_tbi_reset_enable;
1708                 tp->phy_reset_pending = rtl8169_tbi_reset_pending;
1709                 tp->link_ok = rtl8169_tbi_link_ok;
1710
1711                 tp->phy_1000_ctrl_reg = ADVERTISE_1000FULL; /* Implied by TBI */
1712         } else {
1713                 tp->set_speed = rtl8169_set_speed_xmii;
1714                 tp->get_settings = rtl8169_gset_xmii;
1715                 tp->phy_reset_enable = rtl8169_xmii_reset_enable;
1716                 tp->phy_reset_pending = rtl8169_xmii_reset_pending;
1717                 tp->link_ok = rtl8169_xmii_link_ok;
1718
1719                 dev->do_ioctl = rtl8169_ioctl;
1720         }
1721
1722         /* Get MAC address.  FIXME: read EEPROM */
1723         for (i = 0; i < MAC_ADDR_LEN; i++)
1724                 dev->dev_addr[i] = RTL_R8(MAC0 + i);
1725         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1726
1727         dev->open = rtl8169_open;
1728         dev->hard_start_xmit = rtl8169_start_xmit;
1729         dev->get_stats = rtl8169_get_stats;
1730         SET_ETHTOOL_OPS(dev, &rtl8169_ethtool_ops);
1731         dev->stop = rtl8169_close;
1732         dev->tx_timeout = rtl8169_tx_timeout;
1733         dev->set_multicast_list = rtl_set_rx_mode;
1734         dev->watchdog_timeo = RTL8169_TX_TIMEOUT;
1735         dev->irq = pdev->irq;
1736         dev->base_addr = (unsigned long) ioaddr;
1737         dev->change_mtu = rtl8169_change_mtu;
1738         dev->set_mac_address = rtl_set_mac_address;
1739
1740 #ifdef CONFIG_R8169_NAPI
1741         netif_napi_add(dev, &tp->napi, rtl8169_poll, R8169_NAPI_WEIGHT);
1742 #endif
1743
1744 #ifdef CONFIG_R8169_VLAN
1745         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1746         dev->vlan_rx_register = rtl8169_vlan_rx_register;
1747 #endif
1748
1749 #ifdef CONFIG_NET_POLL_CONTROLLER
1750         dev->poll_controller = rtl8169_netpoll;
1751 #endif
1752
1753         tp->intr_mask = 0xffff;
1754         tp->pci_dev = pdev;
1755         tp->mmio_addr = ioaddr;
1756         tp->align = cfg->align;
1757         tp->hw_start = cfg->hw_start;
1758         tp->intr_event = cfg->intr_event;
1759         tp->napi_event = cfg->napi_event;
1760
1761         init_timer(&tp->timer);
1762         tp->timer.data = (unsigned long) dev;
1763         tp->timer.function = rtl8169_phy_timer;
1764
1765         spin_lock_init(&tp->lock);
1766
1767         rc = register_netdev(dev);
1768         if (rc < 0)
1769                 goto err_out_msi_5;
1770
1771         pci_set_drvdata(pdev, dev);
1772
1773         if (netif_msg_probe(tp)) {
1774                 u32 xid = RTL_R32(TxConfig) & 0x7cf0f8ff;
1775
1776                 printk(KERN_INFO "%s: %s at 0x%lx, "
1777                        "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
1778                        "XID %08x IRQ %d\n",
1779                        dev->name,
1780                        rtl_chip_info[tp->chipset].name,
1781                        dev->base_addr,
1782                        dev->dev_addr[0], dev->dev_addr[1],
1783                        dev->dev_addr[2], dev->dev_addr[3],
1784                        dev->dev_addr[4], dev->dev_addr[5], xid, dev->irq);
1785         }
1786
1787         rtl8169_init_phy(dev, tp);
1788
1789 out:
1790         return rc;
1791
1792 err_out_msi_5:
1793         rtl_disable_msi(pdev, tp);
1794         iounmap(ioaddr);
1795 err_out_free_res_4:
1796         pci_release_regions(pdev);
1797 err_out_mwi_3:
1798         pci_clear_mwi(pdev);
1799 err_out_disable_2:
1800         pci_disable_device(pdev);
1801 err_out_free_dev_1:
1802         free_netdev(dev);
1803         goto out;
1804 }
1805
1806 static void __devexit rtl8169_remove_one(struct pci_dev *pdev)
1807 {
1808         struct net_device *dev = pci_get_drvdata(pdev);
1809         struct rtl8169_private *tp = netdev_priv(dev);
1810
1811         flush_scheduled_work();
1812
1813         unregister_netdev(dev);
1814         rtl_disable_msi(pdev, tp);
1815         rtl8169_release_board(pdev, dev, tp->mmio_addr);
1816         pci_set_drvdata(pdev, NULL);
1817 }
1818
1819 static void rtl8169_set_rxbufsize(struct rtl8169_private *tp,
1820                                   struct net_device *dev)
1821 {
1822         unsigned int mtu = dev->mtu;
1823
1824         tp->rx_buf_sz = (mtu > RX_BUF_SIZE) ? mtu + ETH_HLEN + 8 : RX_BUF_SIZE;
1825 }
1826
1827 static int rtl8169_open(struct net_device *dev)
1828 {
1829         struct rtl8169_private *tp = netdev_priv(dev);
1830         struct pci_dev *pdev = tp->pci_dev;
1831         int retval = -ENOMEM;
1832
1833
1834         rtl8169_set_rxbufsize(tp, dev);
1835
1836         /*
1837          * Rx and Tx desscriptors needs 256 bytes alignment.
1838          * pci_alloc_consistent provides more.
1839          */
1840         tp->TxDescArray = pci_alloc_consistent(pdev, R8169_TX_RING_BYTES,
1841                                                &tp->TxPhyAddr);
1842         if (!tp->TxDescArray)
1843                 goto out;
1844
1845         tp->RxDescArray = pci_alloc_consistent(pdev, R8169_RX_RING_BYTES,
1846                                                &tp->RxPhyAddr);
1847         if (!tp->RxDescArray)
1848                 goto err_free_tx_0;
1849
1850         retval = rtl8169_init_ring(dev);
1851         if (retval < 0)
1852                 goto err_free_rx_1;
1853
1854         INIT_DELAYED_WORK(&tp->task, NULL);
1855
1856         smp_mb();
1857
1858         retval = request_irq(dev->irq, rtl8169_interrupt,
1859                              (tp->features & RTL_FEATURE_MSI) ? 0 : IRQF_SHARED,
1860                              dev->name, dev);
1861         if (retval < 0)
1862                 goto err_release_ring_2;
1863
1864 #ifdef CONFIG_R8169_NAPI
1865         napi_enable(&tp->napi);
1866 #endif
1867
1868         rtl_hw_start(dev);
1869
1870         rtl8169_request_timer(dev);
1871
1872         rtl8169_check_link_status(dev, tp, tp->mmio_addr);
1873 out:
1874         return retval;
1875
1876 err_release_ring_2:
1877         rtl8169_rx_clear(tp);
1878 err_free_rx_1:
1879         pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
1880                             tp->RxPhyAddr);
1881 err_free_tx_0:
1882         pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
1883                             tp->TxPhyAddr);
1884         goto out;
1885 }
1886
1887 static void rtl8169_hw_reset(void __iomem *ioaddr)
1888 {
1889         /* Disable interrupts */
1890         rtl8169_irq_mask_and_ack(ioaddr);
1891
1892         /* Reset the chipset */
1893         RTL_W8(ChipCmd, CmdReset);
1894
1895         /* PCI commit */
1896         RTL_R8(ChipCmd);
1897 }
1898
1899 static void rtl_set_rx_tx_config_registers(struct rtl8169_private *tp)
1900 {
1901         void __iomem *ioaddr = tp->mmio_addr;
1902         u32 cfg = rtl8169_rx_config;
1903
1904         cfg |= (RTL_R32(RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1905         RTL_W32(RxConfig, cfg);
1906
1907         /* Set DMA burst size and Interframe Gap Time */
1908         RTL_W32(TxConfig, (TX_DMA_BURST << TxDMAShift) |
1909                 (InterFrameGap << TxInterFrameGapShift));
1910 }
1911
1912 static void rtl_hw_start(struct net_device *dev)
1913 {
1914         struct rtl8169_private *tp = netdev_priv(dev);
1915         void __iomem *ioaddr = tp->mmio_addr;
1916         unsigned int i;
1917
1918         /* Soft reset the chip. */
1919         RTL_W8(ChipCmd, CmdReset);
1920
1921         /* Check that the chip has finished the reset. */
1922         for (i = 0; i < 100; i++) {
1923                 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
1924                         break;
1925                 msleep_interruptible(1);
1926         }
1927
1928         tp->hw_start(dev);
1929
1930         netif_start_queue(dev);
1931 }
1932
1933
1934 static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp,
1935                                          void __iomem *ioaddr)
1936 {
1937         /*
1938          * Magic spell: some iop3xx ARM board needs the TxDescAddrHigh
1939          * register to be written before TxDescAddrLow to work.
1940          * Switching from MMIO to I/O access fixes the issue as well.
1941          */
1942         RTL_W32(TxDescStartAddrHigh, ((u64) tp->TxPhyAddr) >> 32);
1943         RTL_W32(TxDescStartAddrLow, ((u64) tp->TxPhyAddr) & DMA_32BIT_MASK);
1944         RTL_W32(RxDescAddrHigh, ((u64) tp->RxPhyAddr) >> 32);
1945         RTL_W32(RxDescAddrLow, ((u64) tp->RxPhyAddr) & DMA_32BIT_MASK);
1946 }
1947
1948 static u16 rtl_rw_cpluscmd(void __iomem *ioaddr)
1949 {
1950         u16 cmd;
1951
1952         cmd = RTL_R16(CPlusCmd);
1953         RTL_W16(CPlusCmd, cmd);
1954         return cmd;
1955 }
1956
1957 static void rtl_set_rx_max_size(void __iomem *ioaddr)
1958 {
1959         /* Low hurts. Let's disable the filtering. */
1960         RTL_W16(RxMaxSize, 16383);
1961 }
1962
1963 static void rtl8169_set_magic_reg(void __iomem *ioaddr, unsigned mac_version)
1964 {
1965         struct {
1966                 u32 mac_version;
1967                 u32 clk;
1968                 u32 val;
1969         } cfg2_info [] = {
1970                 { RTL_GIGA_MAC_VER_05, PCI_Clock_33MHz, 0x000fff00 }, // 8110SCd
1971                 { RTL_GIGA_MAC_VER_05, PCI_Clock_66MHz, 0x000fffff },
1972                 { RTL_GIGA_MAC_VER_06, PCI_Clock_33MHz, 0x00ffff00 }, // 8110SCe
1973                 { RTL_GIGA_MAC_VER_06, PCI_Clock_66MHz, 0x00ffffff }
1974         }, *p = cfg2_info;
1975         unsigned int i;
1976         u32 clk;
1977
1978         clk = RTL_R8(Config2) & PCI_Clock_66MHz;
1979         for (i = 0; i < ARRAY_SIZE(cfg2_info); i++) {
1980                 if ((p->mac_version == mac_version) && (p->clk == clk)) {
1981                         RTL_W32(0x7c, p->val);
1982                         break;
1983                 }
1984         }
1985 }
1986
1987 static void rtl_hw_start_8169(struct net_device *dev)
1988 {
1989         struct rtl8169_private *tp = netdev_priv(dev);
1990         void __iomem *ioaddr = tp->mmio_addr;
1991         struct pci_dev *pdev = tp->pci_dev;
1992
1993         if (tp->mac_version == RTL_GIGA_MAC_VER_05) {
1994                 RTL_W16(CPlusCmd, RTL_R16(CPlusCmd) | PCIMulRW);
1995                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 0x08);
1996         }
1997
1998         RTL_W8(Cfg9346, Cfg9346_Unlock);
1999         if ((tp->mac_version == RTL_GIGA_MAC_VER_01) ||
2000             (tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2001             (tp->mac_version == RTL_GIGA_MAC_VER_03) ||
2002             (tp->mac_version == RTL_GIGA_MAC_VER_04))
2003                 RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2004
2005         RTL_W8(EarlyTxThres, EarlyTxThld);
2006
2007         rtl_set_rx_max_size(ioaddr);
2008
2009         if ((tp->mac_version == RTL_GIGA_MAC_VER_01) ||
2010             (tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2011             (tp->mac_version == RTL_GIGA_MAC_VER_03) ||
2012             (tp->mac_version == RTL_GIGA_MAC_VER_04))
2013                 rtl_set_rx_tx_config_registers(tp);
2014
2015         tp->cp_cmd |= rtl_rw_cpluscmd(ioaddr) | PCIMulRW;
2016
2017         if ((tp->mac_version == RTL_GIGA_MAC_VER_02) ||
2018             (tp->mac_version == RTL_GIGA_MAC_VER_03)) {
2019                 dprintk("Set MAC Reg C+CR Offset 0xE0. "
2020                         "Bit-3 and bit-14 MUST be 1\n");
2021                 tp->cp_cmd |= (1 << 14);
2022         }
2023
2024         RTL_W16(CPlusCmd, tp->cp_cmd);
2025
2026         rtl8169_set_magic_reg(ioaddr, tp->mac_version);
2027
2028         /*
2029          * Undocumented corner. Supposedly:
2030          * (TxTimer << 12) | (TxPackets << 8) | (RxTimer << 4) | RxPackets
2031          */
2032         RTL_W16(IntrMitigate, 0x0000);
2033
2034         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2035
2036         if ((tp->mac_version != RTL_GIGA_MAC_VER_01) &&
2037             (tp->mac_version != RTL_GIGA_MAC_VER_02) &&
2038             (tp->mac_version != RTL_GIGA_MAC_VER_03) &&
2039             (tp->mac_version != RTL_GIGA_MAC_VER_04)) {
2040                 RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2041                 rtl_set_rx_tx_config_registers(tp);
2042         }
2043
2044         RTL_W8(Cfg9346, Cfg9346_Lock);
2045
2046         /* Initially a 10 us delay. Turned it into a PCI commit. - FR */
2047         RTL_R8(IntrMask);
2048
2049         RTL_W32(RxMissed, 0);
2050
2051         rtl_set_rx_mode(dev);
2052
2053         /* no early-rx interrupts */
2054         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
2055
2056         /* Enable all known interrupts by setting the interrupt mask. */
2057         RTL_W16(IntrMask, tp->intr_event);
2058 }
2059
2060 static void rtl_hw_start_8168(struct net_device *dev)
2061 {
2062         struct rtl8169_private *tp = netdev_priv(dev);
2063         void __iomem *ioaddr = tp->mmio_addr;
2064         struct pci_dev *pdev = tp->pci_dev;
2065         u8 ctl;
2066
2067         RTL_W8(Cfg9346, Cfg9346_Unlock);
2068
2069         RTL_W8(EarlyTxThres, EarlyTxThld);
2070
2071         rtl_set_rx_max_size(ioaddr);
2072
2073         rtl_set_rx_tx_config_registers(tp);
2074
2075         tp->cp_cmd |= RTL_R16(CPlusCmd) | PktCntrDisable | INTT_1;
2076
2077         RTL_W16(CPlusCmd, tp->cp_cmd);
2078
2079         /* Tx performance tweak. */
2080         pci_read_config_byte(pdev, 0x69, &ctl);
2081         ctl = (ctl & ~0x70) | 0x50;
2082         pci_write_config_byte(pdev, 0x69, ctl);
2083
2084         RTL_W16(IntrMitigate, 0x5151);
2085
2086         /* Work around for RxFIFO overflow. */
2087         if (tp->mac_version == RTL_GIGA_MAC_VER_11) {
2088                 tp->intr_event |= RxFIFOOver | PCSTimeout;
2089                 tp->intr_event &= ~RxOverflow;
2090         }
2091
2092         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2093
2094         RTL_W8(Cfg9346, Cfg9346_Lock);
2095
2096         RTL_R8(IntrMask);
2097
2098         RTL_W32(RxMissed, 0);
2099
2100         rtl_set_rx_mode(dev);
2101
2102         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2103
2104         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
2105
2106         RTL_W16(IntrMask, tp->intr_event);
2107 }
2108
2109 static void rtl_hw_start_8101(struct net_device *dev)
2110 {
2111         struct rtl8169_private *tp = netdev_priv(dev);
2112         void __iomem *ioaddr = tp->mmio_addr;
2113         struct pci_dev *pdev = tp->pci_dev;
2114
2115         if ((tp->mac_version == RTL_GIGA_MAC_VER_13) ||
2116             (tp->mac_version == RTL_GIGA_MAC_VER_16)) {
2117                 pci_write_config_word(pdev, 0x68, 0x00);
2118                 pci_write_config_word(pdev, 0x69, 0x08);
2119         }
2120
2121         RTL_W8(Cfg9346, Cfg9346_Unlock);
2122
2123         RTL_W8(EarlyTxThres, EarlyTxThld);
2124
2125         rtl_set_rx_max_size(ioaddr);
2126
2127         tp->cp_cmd |= rtl_rw_cpluscmd(ioaddr) | PCIMulRW;
2128
2129         RTL_W16(CPlusCmd, tp->cp_cmd);
2130
2131         RTL_W16(IntrMitigate, 0x0000);
2132
2133         rtl_set_rx_tx_desc_registers(tp, ioaddr);
2134
2135         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2136         rtl_set_rx_tx_config_registers(tp);
2137
2138         RTL_W8(Cfg9346, Cfg9346_Lock);
2139
2140         RTL_R8(IntrMask);
2141
2142         RTL_W32(RxMissed, 0);
2143
2144         rtl_set_rx_mode(dev);
2145
2146         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
2147
2148         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xf000);
2149
2150         RTL_W16(IntrMask, tp->intr_event);
2151 }
2152
2153 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
2154 {
2155         struct rtl8169_private *tp = netdev_priv(dev);
2156         int ret = 0;
2157
2158         if (new_mtu < ETH_ZLEN || new_mtu > SafeMtu)
2159                 return -EINVAL;
2160
2161         dev->mtu = new_mtu;
2162
2163         if (!netif_running(dev))
2164                 goto out;
2165
2166         rtl8169_down(dev);
2167
2168         rtl8169_set_rxbufsize(tp, dev);
2169
2170         ret = rtl8169_init_ring(dev);
2171         if (ret < 0)
2172                 goto out;
2173
2174 #ifdef CONFIG_R8169_NAPI
2175         napi_enable(&tp->napi);
2176 #endif
2177
2178         rtl_hw_start(dev);
2179
2180         rtl8169_request_timer(dev);
2181
2182 out:
2183         return ret;
2184 }
2185
2186 static inline void rtl8169_make_unusable_by_asic(struct RxDesc *desc)
2187 {
2188         desc->addr = 0x0badbadbadbadbadull;
2189         desc->opts1 &= ~cpu_to_le32(DescOwn | RsvdMask);
2190 }
2191
2192 static void rtl8169_free_rx_skb(struct rtl8169_private *tp,
2193                                 struct sk_buff **sk_buff, struct RxDesc *desc)
2194 {
2195         struct pci_dev *pdev = tp->pci_dev;
2196
2197         pci_unmap_single(pdev, le64_to_cpu(desc->addr), tp->rx_buf_sz,
2198                          PCI_DMA_FROMDEVICE);
2199         dev_kfree_skb(*sk_buff);
2200         *sk_buff = NULL;
2201         rtl8169_make_unusable_by_asic(desc);
2202 }
2203
2204 static inline void rtl8169_mark_to_asic(struct RxDesc *desc, u32 rx_buf_sz)
2205 {
2206         u32 eor = le32_to_cpu(desc->opts1) & RingEnd;
2207
2208         desc->opts1 = cpu_to_le32(DescOwn | eor | rx_buf_sz);
2209 }
2210
2211 static inline void rtl8169_map_to_asic(struct RxDesc *desc, dma_addr_t mapping,
2212                                        u32 rx_buf_sz)
2213 {
2214         desc->addr = cpu_to_le64(mapping);
2215         wmb();
2216         rtl8169_mark_to_asic(desc, rx_buf_sz);
2217 }
2218
2219 static struct sk_buff *rtl8169_alloc_rx_skb(struct pci_dev *pdev,
2220                                             struct net_device *dev,
2221                                             struct RxDesc *desc, int rx_buf_sz,
2222                                             unsigned int align)
2223 {
2224         struct sk_buff *skb;
2225         dma_addr_t mapping;
2226         unsigned int pad;
2227
2228         pad = align ? align : NET_IP_ALIGN;
2229
2230         skb = netdev_alloc_skb(dev, rx_buf_sz + pad);
2231         if (!skb)
2232                 goto err_out;
2233
2234         skb_reserve(skb, align ? ((pad - 1) & (unsigned long)skb->data) : pad);
2235
2236         mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
2237                                  PCI_DMA_FROMDEVICE);
2238
2239         rtl8169_map_to_asic(desc, mapping, rx_buf_sz);
2240 out:
2241         return skb;
2242
2243 err_out:
2244         rtl8169_make_unusable_by_asic(desc);
2245         goto out;
2246 }
2247
2248 static void rtl8169_rx_clear(struct rtl8169_private *tp)
2249 {
2250         unsigned int i;
2251
2252         for (i = 0; i < NUM_RX_DESC; i++) {
2253                 if (tp->Rx_skbuff[i]) {
2254                         rtl8169_free_rx_skb(tp, tp->Rx_skbuff + i,
2255                                             tp->RxDescArray + i);
2256                 }
2257         }
2258 }
2259
2260 static u32 rtl8169_rx_fill(struct rtl8169_private *tp, struct net_device *dev,
2261                            u32 start, u32 end)
2262 {
2263         u32 cur;
2264
2265         for (cur = start; end - cur != 0; cur++) {
2266                 struct sk_buff *skb;
2267                 unsigned int i = cur % NUM_RX_DESC;
2268
2269                 WARN_ON((s32)(end - cur) < 0);
2270
2271                 if (tp->Rx_skbuff[i])
2272                         continue;
2273
2274                 skb = rtl8169_alloc_rx_skb(tp->pci_dev, dev,
2275                                            tp->RxDescArray + i,
2276                                            tp->rx_buf_sz, tp->align);
2277                 if (!skb)
2278                         break;
2279
2280                 tp->Rx_skbuff[i] = skb;
2281         }
2282         return cur - start;
2283 }
2284
2285 static inline void rtl8169_mark_as_last_descriptor(struct RxDesc *desc)
2286 {
2287         desc->opts1 |= cpu_to_le32(RingEnd);
2288 }
2289
2290 static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)
2291 {
2292         tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
2293 }
2294
2295 static int rtl8169_init_ring(struct net_device *dev)
2296 {
2297         struct rtl8169_private *tp = netdev_priv(dev);
2298
2299         rtl8169_init_ring_indexes(tp);
2300
2301         memset(tp->tx_skb, 0x0, NUM_TX_DESC * sizeof(struct ring_info));
2302         memset(tp->Rx_skbuff, 0x0, NUM_RX_DESC * sizeof(struct sk_buff *));
2303
2304         if (rtl8169_rx_fill(tp, dev, 0, NUM_RX_DESC) != NUM_RX_DESC)
2305                 goto err_out;
2306
2307         rtl8169_mark_as_last_descriptor(tp->RxDescArray + NUM_RX_DESC - 1);
2308
2309         return 0;
2310
2311 err_out:
2312         rtl8169_rx_clear(tp);
2313         return -ENOMEM;
2314 }
2315
2316 static void rtl8169_unmap_tx_skb(struct pci_dev *pdev, struct ring_info *tx_skb,
2317                                  struct TxDesc *desc)
2318 {
2319         unsigned int len = tx_skb->len;
2320
2321         pci_unmap_single(pdev, le64_to_cpu(desc->addr), len, PCI_DMA_TODEVICE);
2322         desc->opts1 = 0x00;
2323         desc->opts2 = 0x00;
2324         desc->addr = 0x00;
2325         tx_skb->len = 0;
2326 }
2327
2328 static void rtl8169_tx_clear(struct rtl8169_private *tp)
2329 {
2330         unsigned int i;
2331
2332         for (i = tp->dirty_tx; i < tp->dirty_tx + NUM_TX_DESC; i++) {
2333                 unsigned int entry = i % NUM_TX_DESC;
2334                 struct ring_info *tx_skb = tp->tx_skb + entry;
2335                 unsigned int len = tx_skb->len;
2336
2337                 if (len) {
2338                         struct sk_buff *skb = tx_skb->skb;
2339
2340                         rtl8169_unmap_tx_skb(tp->pci_dev, tx_skb,
2341                                              tp->TxDescArray + entry);
2342                         if (skb) {
2343                                 dev_kfree_skb(skb);
2344                                 tx_skb->skb = NULL;
2345                         }
2346                         tp->dev->stats.tx_dropped++;
2347                 }
2348         }
2349         tp->cur_tx = tp->dirty_tx = 0;
2350 }
2351
2352 static void rtl8169_schedule_work(struct net_device *dev, work_func_t task)
2353 {
2354         struct rtl8169_private *tp = netdev_priv(dev);
2355
2356         PREPARE_DELAYED_WORK(&tp->task, task);
2357         schedule_delayed_work(&tp->task, 4);
2358 }
2359
2360 static void rtl8169_wait_for_quiescence(struct net_device *dev)
2361 {
2362         struct rtl8169_private *tp = netdev_priv(dev);
2363         void __iomem *ioaddr = tp->mmio_addr;
2364
2365         synchronize_irq(dev->irq);
2366
2367         /* Wait for any pending NAPI task to complete */
2368 #ifdef CONFIG_R8169_NAPI
2369         napi_disable(&tp->napi);
2370 #endif
2371
2372         rtl8169_irq_mask_and_ack(ioaddr);
2373
2374 #ifdef CONFIG_R8169_NAPI
2375         napi_enable(&tp->napi);
2376 #endif
2377 }
2378
2379 static void rtl8169_reinit_task(struct work_struct *work)
2380 {
2381         struct rtl8169_private *tp =
2382                 container_of(work, struct rtl8169_private, task.work);
2383         struct net_device *dev = tp->dev;
2384         int ret;
2385
2386         rtnl_lock();
2387
2388         if (!netif_running(dev))
2389                 goto out_unlock;
2390
2391         rtl8169_wait_for_quiescence(dev);
2392         rtl8169_close(dev);
2393
2394         ret = rtl8169_open(dev);
2395         if (unlikely(ret < 0)) {
2396                 if (net_ratelimit() && netif_msg_drv(tp)) {
2397                         printk(KERN_ERR PFX "%s: reinit failure (status = %d)."
2398                                " Rescheduling.\n", dev->name, ret);
2399                 }
2400                 rtl8169_schedule_work(dev, rtl8169_reinit_task);
2401         }
2402
2403 out_unlock:
2404         rtnl_unlock();
2405 }
2406
2407 static void rtl8169_reset_task(struct work_struct *work)
2408 {
2409         struct rtl8169_private *tp =
2410                 container_of(work, struct rtl8169_private, task.work);
2411         struct net_device *dev = tp->dev;
2412
2413         rtnl_lock();
2414
2415         if (!netif_running(dev))
2416                 goto out_unlock;
2417
2418         rtl8169_wait_for_quiescence(dev);
2419
2420         rtl8169_rx_interrupt(dev, tp, tp->mmio_addr, ~(u32)0);
2421         rtl8169_tx_clear(tp);
2422
2423         if (tp->dirty_rx == tp->cur_rx) {
2424                 rtl8169_init_ring_indexes(tp);
2425                 rtl_hw_start(dev);
2426                 netif_wake_queue(dev);
2427                 rtl8169_check_link_status(dev, tp, tp->mmio_addr);
2428         } else {
2429                 if (net_ratelimit() && netif_msg_intr(tp)) {
2430                         printk(KERN_EMERG PFX "%s: Rx buffers shortage\n",
2431                                dev->name);
2432                 }
2433                 rtl8169_schedule_work(dev, rtl8169_reset_task);
2434         }
2435
2436 out_unlock:
2437         rtnl_unlock();
2438 }
2439
2440 static void rtl8169_tx_timeout(struct net_device *dev)
2441 {
2442         struct rtl8169_private *tp = netdev_priv(dev);
2443
2444         rtl8169_hw_reset(tp->mmio_addr);
2445
2446         /* Let's wait a bit while any (async) irq lands on */
2447         rtl8169_schedule_work(dev, rtl8169_reset_task);
2448 }
2449
2450 static int rtl8169_xmit_frags(struct rtl8169_private *tp, struct sk_buff *skb,
2451                               u32 opts1)
2452 {
2453         struct skb_shared_info *info = skb_shinfo(skb);
2454         unsigned int cur_frag, entry;
2455         struct TxDesc * uninitialized_var(txd);
2456
2457         entry = tp->cur_tx;
2458         for (cur_frag = 0; cur_frag < info->nr_frags; cur_frag++) {
2459                 skb_frag_t *frag = info->frags + cur_frag;
2460                 dma_addr_t mapping;
2461                 u32 status, len;
2462                 void *addr;
2463
2464                 entry = (entry + 1) % NUM_TX_DESC;
2465
2466                 txd = tp->TxDescArray + entry;
2467                 len = frag->size;
2468                 addr = ((void *) page_address(frag->page)) + frag->page_offset;
2469                 mapping = pci_map_single(tp->pci_dev, addr, len, PCI_DMA_TODEVICE);
2470
2471                 /* anti gcc 2.95.3 bugware (sic) */
2472                 status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC));
2473
2474                 txd->opts1 = cpu_to_le32(status);
2475                 txd->addr = cpu_to_le64(mapping);
2476
2477                 tp->tx_skb[entry].len = len;
2478         }
2479
2480         if (cur_frag) {
2481                 tp->tx_skb[entry].skb = skb;
2482                 txd->opts1 |= cpu_to_le32(LastFrag);
2483         }
2484
2485         return cur_frag;
2486 }
2487
2488 static inline u32 rtl8169_tso_csum(struct sk_buff *skb, struct net_device *dev)
2489 {
2490         if (dev->features & NETIF_F_TSO) {
2491                 u32 mss = skb_shinfo(skb)->gso_size;
2492
2493                 if (mss)
2494                         return LargeSend | ((mss & MSSMask) << MSSShift);
2495         }
2496         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2497                 const struct iphdr *ip = ip_hdr(skb);
2498
2499                 if (ip->protocol == IPPROTO_TCP)
2500                         return IPCS | TCPCS;
2501                 else if (ip->protocol == IPPROTO_UDP)
2502                         return IPCS | UDPCS;
2503                 WARN_ON(1);     /* we need a WARN() */
2504         }
2505         return 0;
2506 }
2507
2508 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev)
2509 {
2510         struct rtl8169_private *tp = netdev_priv(dev);
2511         unsigned int frags, entry = tp->cur_tx % NUM_TX_DESC;
2512         struct TxDesc *txd = tp->TxDescArray + entry;
2513         void __iomem *ioaddr = tp->mmio_addr;
2514         dma_addr_t mapping;
2515         u32 status, len;
2516         u32 opts1;
2517         int ret = NETDEV_TX_OK;
2518
2519         if (unlikely(TX_BUFFS_AVAIL(tp) < skb_shinfo(skb)->nr_frags)) {
2520                 if (netif_msg_drv(tp)) {
2521                         printk(KERN_ERR
2522                                "%s: BUG! Tx Ring full when queue awake!\n",
2523                                dev->name);
2524                 }
2525                 goto err_stop;
2526         }
2527
2528         if (unlikely(le32_to_cpu(txd->opts1) & DescOwn))
2529                 goto err_stop;
2530
2531         opts1 = DescOwn | rtl8169_tso_csum(skb, dev);
2532
2533         frags = rtl8169_xmit_frags(tp, skb, opts1);
2534         if (frags) {
2535                 len = skb_headlen(skb);
2536                 opts1 |= FirstFrag;
2537         } else {
2538                 len = skb->len;
2539
2540                 if (unlikely(len < ETH_ZLEN)) {
2541                         if (skb_padto(skb, ETH_ZLEN))
2542                                 goto err_update_stats;
2543                         len = ETH_ZLEN;
2544                 }
2545
2546                 opts1 |= FirstFrag | LastFrag;
2547                 tp->tx_skb[entry].skb = skb;
2548         }
2549
2550         mapping = pci_map_single(tp->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
2551
2552         tp->tx_skb[entry].len = len;
2553         txd->addr = cpu_to_le64(mapping);
2554         txd->opts2 = cpu_to_le32(rtl8169_tx_vlan_tag(tp, skb));
2555
2556         wmb();
2557
2558         /* anti gcc 2.95.3 bugware (sic) */
2559         status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC));
2560         txd->opts1 = cpu_to_le32(status);
2561
2562         dev->trans_start = jiffies;
2563
2564         tp->cur_tx += frags + 1;
2565
2566         smp_wmb();
2567
2568         RTL_W8(TxPoll, NPQ);    /* set polling bit */
2569
2570         if (TX_BUFFS_AVAIL(tp) < MAX_SKB_FRAGS) {
2571                 netif_stop_queue(dev);
2572                 smp_rmb();
2573                 if (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)
2574                         netif_wake_queue(dev);
2575         }
2576
2577 out:
2578         return ret;
2579
2580 err_stop:
2581         netif_stop_queue(dev);
2582         ret = NETDEV_TX_BUSY;
2583 err_update_stats:
2584         dev->stats.tx_dropped++;
2585         goto out;
2586 }
2587
2588 static void rtl8169_pcierr_interrupt(struct net_device *dev)
2589 {
2590         struct rtl8169_private *tp = netdev_priv(dev);
2591         struct pci_dev *pdev = tp->pci_dev;
2592         void __iomem *ioaddr = tp->mmio_addr;
2593         u16 pci_status, pci_cmd;
2594
2595         pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
2596         pci_read_config_word(pdev, PCI_STATUS, &pci_status);
2597
2598         if (netif_msg_intr(tp)) {
2599                 printk(KERN_ERR
2600                        "%s: PCI error (cmd = 0x%04x, status = 0x%04x).\n",
2601                        dev->name, pci_cmd, pci_status);
2602         }
2603
2604         /*
2605          * The recovery sequence below admits a very elaborated explanation:
2606          * - it seems to work;
2607          * - I did not see what else could be done;
2608          * - it makes iop3xx happy.
2609          *
2610          * Feel free to adjust to your needs.
2611          */
2612         if (pdev->broken_parity_status)
2613                 pci_cmd &= ~PCI_COMMAND_PARITY;
2614         else
2615                 pci_cmd |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY;
2616
2617         pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
2618
2619         pci_write_config_word(pdev, PCI_STATUS,
2620                 pci_status & (PCI_STATUS_DETECTED_PARITY |
2621                 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_REC_MASTER_ABORT |
2622                 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_SIG_TARGET_ABORT));
2623
2624         /* The infamous DAC f*ckup only happens at boot time */
2625         if ((tp->cp_cmd & PCIDAC) && !tp->dirty_rx && !tp->cur_rx) {
2626                 if (netif_msg_intr(tp))
2627                         printk(KERN_INFO "%s: disabling PCI DAC.\n", dev->name);
2628                 tp->cp_cmd &= ~PCIDAC;
2629                 RTL_W16(CPlusCmd, tp->cp_cmd);
2630                 dev->features &= ~NETIF_F_HIGHDMA;
2631         }
2632
2633         rtl8169_hw_reset(ioaddr);
2634
2635         rtl8169_schedule_work(dev, rtl8169_reinit_task);
2636 }
2637
2638 static void rtl8169_tx_interrupt(struct net_device *dev,
2639                                  struct rtl8169_private *tp,
2640                                  void __iomem *ioaddr)
2641 {
2642         unsigned int dirty_tx, tx_left;
2643
2644         dirty_tx = tp->dirty_tx;
2645         smp_rmb();
2646         tx_left = tp->cur_tx - dirty_tx;
2647
2648         while (tx_left > 0) {
2649                 unsigned int entry = dirty_tx % NUM_TX_DESC;
2650                 struct ring_info *tx_skb = tp->tx_skb + entry;
2651                 u32 len = tx_skb->len;
2652                 u32 status;
2653
2654                 rmb();
2655                 status = le32_to_cpu(tp->TxDescArray[entry].opts1);
2656                 if (status & DescOwn)
2657                         break;
2658
2659                 dev->stats.tx_bytes += len;
2660                 dev->stats.tx_packets++;
2661
2662                 rtl8169_unmap_tx_skb(tp->pci_dev, tx_skb, tp->TxDescArray + entry);
2663
2664                 if (status & LastFrag) {
2665                         dev_kfree_skb_irq(tx_skb->skb);
2666                         tx_skb->skb = NULL;
2667                 }
2668                 dirty_tx++;
2669                 tx_left--;
2670         }
2671
2672         if (tp->dirty_tx != dirty_tx) {
2673                 tp->dirty_tx = dirty_tx;
2674                 smp_wmb();
2675                 if (netif_queue_stopped(dev) &&
2676                     (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)) {
2677                         netif_wake_queue(dev);
2678                 }
2679                 /*
2680                  * 8168 hack: TxPoll requests are lost when the Tx packets are
2681                  * too close. Let's kick an extra TxPoll request when a burst
2682                  * of start_xmit activity is detected (if it is not detected,
2683                  * it is slow enough). -- FR
2684                  */
2685                 smp_rmb();
2686                 if (tp->cur_tx != dirty_tx)
2687                         RTL_W8(TxPoll, NPQ);
2688         }
2689 }
2690
2691 static inline int rtl8169_fragmented_frame(u32 status)
2692 {
2693         return (status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag);
2694 }
2695
2696 static inline void rtl8169_rx_csum(struct sk_buff *skb, struct RxDesc *desc)
2697 {
2698         u32 opts1 = le32_to_cpu(desc->opts1);
2699         u32 status = opts1 & RxProtoMask;
2700
2701         if (((status == RxProtoTCP) && !(opts1 & TCPFail)) ||
2702             ((status == RxProtoUDP) && !(opts1 & UDPFail)) ||
2703             ((status == RxProtoIP) && !(opts1 & IPFail)))
2704                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2705         else
2706                 skb->ip_summed = CHECKSUM_NONE;
2707 }
2708
2709 static inline bool rtl8169_try_rx_copy(struct sk_buff **sk_buff,
2710                                        struct rtl8169_private *tp, int pkt_size,
2711                                        dma_addr_t addr)
2712 {
2713         struct sk_buff *skb;
2714         bool done = false;
2715
2716         if (pkt_size >= rx_copybreak)
2717                 goto out;
2718
2719         skb = netdev_alloc_skb(tp->dev, pkt_size + NET_IP_ALIGN);
2720         if (!skb)
2721                 goto out;
2722
2723         pci_dma_sync_single_for_cpu(tp->pci_dev, addr, pkt_size,
2724                                     PCI_DMA_FROMDEVICE);
2725         skb_reserve(skb, NET_IP_ALIGN);
2726         skb_copy_from_linear_data(*sk_buff, skb->data, pkt_size);
2727         *sk_buff = skb;
2728         done = true;
2729 out:
2730         return done;
2731 }
2732
2733 static int rtl8169_rx_interrupt(struct net_device *dev,
2734                                 struct rtl8169_private *tp,
2735                                 void __iomem *ioaddr, u32 budget)
2736 {
2737         unsigned int cur_rx, rx_left;
2738         unsigned int delta, count;
2739
2740         cur_rx = tp->cur_rx;
2741         rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
2742         rx_left = rtl8169_rx_quota(rx_left, budget);
2743
2744         for (; rx_left > 0; rx_left--, cur_rx++) {
2745                 unsigned int entry = cur_rx % NUM_RX_DESC;
2746                 struct RxDesc *desc = tp->RxDescArray + entry;
2747                 u32 status;
2748
2749                 rmb();
2750                 status = le32_to_cpu(desc->opts1);
2751
2752                 if (status & DescOwn)
2753                         break;
2754                 if (unlikely(status & RxRES)) {
2755                         if (netif_msg_rx_err(tp)) {
2756                                 printk(KERN_INFO
2757                                        "%s: Rx ERROR. status = %08x\n",
2758                                        dev->name, status);
2759                         }
2760                         dev->stats.rx_errors++;
2761                         if (status & (RxRWT | RxRUNT))
2762                                 dev->stats.rx_length_errors++;
2763                         if (status & RxCRC)
2764                                 dev->stats.rx_crc_errors++;
2765                         if (status & RxFOVF) {
2766                                 rtl8169_schedule_work(dev, rtl8169_reset_task);
2767                                 dev->stats.rx_fifo_errors++;
2768                         }
2769                         rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2770                 } else {
2771                         struct sk_buff *skb = tp->Rx_skbuff[entry];
2772                         dma_addr_t addr = le64_to_cpu(desc->addr);
2773                         int pkt_size = (status & 0x00001FFF) - 4;
2774                         struct pci_dev *pdev = tp->pci_dev;
2775
2776                         /*
2777                          * The driver does not support incoming fragmented
2778                          * frames. They are seen as a symptom of over-mtu
2779                          * sized frames.
2780                          */
2781                         if (unlikely(rtl8169_fragmented_frame(status))) {
2782                                 dev->stats.rx_dropped++;
2783                                 dev->stats.rx_length_errors++;
2784                                 rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2785                                 continue;
2786                         }
2787
2788                         rtl8169_rx_csum(skb, desc);
2789
2790                         if (rtl8169_try_rx_copy(&skb, tp, pkt_size, addr)) {
2791                                 pci_dma_sync_single_for_device(pdev, addr,
2792                                         pkt_size, PCI_DMA_FROMDEVICE);
2793                                 rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2794                         } else {
2795                                 pci_unmap_single(pdev, addr, pkt_size,
2796                                                  PCI_DMA_FROMDEVICE);
2797                                 tp->Rx_skbuff[entry] = NULL;
2798                         }
2799
2800                         skb_put(skb, pkt_size);
2801                         skb->protocol = eth_type_trans(skb, dev);
2802
2803                         if (rtl8169_rx_vlan_skb(tp, desc, skb) < 0)
2804                                 rtl8169_rx_skb(skb);
2805
2806                         dev->last_rx = jiffies;
2807                         dev->stats.rx_bytes += pkt_size;
2808                         dev->stats.rx_packets++;
2809                 }
2810
2811                 /* Work around for AMD plateform. */
2812                 if ((desc->opts2 & 0xfffe000) &&
2813                     (tp->mac_version == RTL_GIGA_MAC_VER_05)) {
2814                         desc->opts2 = 0;
2815                         cur_rx++;
2816                 }
2817         }
2818
2819         count = cur_rx - tp->cur_rx;
2820         tp->cur_rx = cur_rx;
2821
2822         delta = rtl8169_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);
2823         if (!delta && count && netif_msg_intr(tp))
2824                 printk(KERN_INFO "%s: no Rx buffer allocated\n", dev->name);
2825         tp->dirty_rx += delta;
2826
2827         /*
2828          * FIXME: until there is periodic timer to try and refill the ring,
2829          * a temporary shortage may definitely kill the Rx process.
2830          * - disable the asic to try and avoid an overflow and kick it again
2831          *   after refill ?
2832          * - how do others driver handle this condition (Uh oh...).
2833          */
2834         if ((tp->dirty_rx + NUM_RX_DESC == tp->cur_rx) && netif_msg_intr(tp))
2835                 printk(KERN_EMERG "%s: Rx buffers exhausted\n", dev->name);
2836
2837         return count;
2838 }
2839
2840 static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
2841 {
2842         struct net_device *dev = dev_instance;
2843         struct rtl8169_private *tp = netdev_priv(dev);
2844         int boguscnt = max_interrupt_work;
2845         void __iomem *ioaddr = tp->mmio_addr;
2846         int status;
2847         int handled = 0;
2848
2849         do {
2850                 status = RTL_R16(IntrStatus);
2851
2852                 /* hotplug/major error/no more work/shared irq */
2853                 if ((status == 0xFFFF) || !status)
2854                         break;
2855
2856                 handled = 1;
2857
2858                 if (unlikely(!netif_running(dev))) {
2859                         rtl8169_asic_down(ioaddr);
2860                         goto out;
2861                 }
2862
2863                 status &= tp->intr_mask;
2864                 RTL_W16(IntrStatus,
2865                         (status & RxFIFOOver) ? (status | RxOverflow) : status);
2866
2867                 if (!(status & tp->intr_event))
2868                         break;
2869
2870                 /* Work around for rx fifo overflow */
2871                 if (unlikely(status & RxFIFOOver) &&
2872                     (tp->mac_version == RTL_GIGA_MAC_VER_11)) {
2873                         netif_stop_queue(dev);
2874                         rtl8169_tx_timeout(dev);
2875                         break;
2876                 }
2877
2878                 if (unlikely(status & SYSErr)) {
2879                         rtl8169_pcierr_interrupt(dev);
2880                         break;
2881                 }
2882
2883                 if (status & LinkChg)
2884                         rtl8169_check_link_status(dev, tp, ioaddr);
2885
2886 #ifdef CONFIG_R8169_NAPI
2887                 if (status & tp->napi_event) {
2888                         RTL_W16(IntrMask, tp->intr_event & ~tp->napi_event);
2889                         tp->intr_mask = ~tp->napi_event;
2890
2891                 if (likely(netif_rx_schedule_prep(dev, &tp->napi)))
2892                         __netif_rx_schedule(dev, &tp->napi);
2893                         else if (netif_msg_intr(tp)) {
2894                                 printk(KERN_INFO "%s: interrupt %04x in poll\n",
2895                                        dev->name, status);
2896                         }
2897                 }
2898                 break;
2899 #else
2900                 /* Rx interrupt */
2901                 if (status & (RxOK | RxOverflow | RxFIFOOver))
2902                         rtl8169_rx_interrupt(dev, tp, ioaddr, ~(u32)0);
2903
2904                 /* Tx interrupt */
2905                 if (status & (TxOK | TxErr))
2906                         rtl8169_tx_interrupt(dev, tp, ioaddr);
2907 #endif
2908
2909                 boguscnt--;
2910         } while (boguscnt > 0);
2911
2912         if (boguscnt <= 0) {
2913                 if (netif_msg_intr(tp) && net_ratelimit() ) {
2914                         printk(KERN_WARNING
2915                                "%s: Too much work at interrupt!\n", dev->name);
2916                 }
2917                 /* Clear all interrupt sources. */
2918                 RTL_W16(IntrStatus, 0xffff);
2919         }
2920 out:
2921         return IRQ_RETVAL(handled);
2922 }
2923
2924 #ifdef CONFIG_R8169_NAPI
2925 static int rtl8169_poll(struct napi_struct *napi, int budget)
2926 {
2927         struct rtl8169_private *tp = container_of(napi, struct rtl8169_private, napi);
2928         struct net_device *dev = tp->dev;
2929         void __iomem *ioaddr = tp->mmio_addr;
2930         int work_done;
2931
2932         work_done = rtl8169_rx_interrupt(dev, tp, ioaddr, (u32) budget);
2933         rtl8169_tx_interrupt(dev, tp, ioaddr);
2934
2935         if (work_done < budget) {
2936                 netif_rx_complete(dev, napi);
2937                 tp->intr_mask = 0xffff;
2938                 /*
2939                  * 20040426: the barrier is not strictly required but the
2940                  * behavior of the irq handler could be less predictable
2941                  * without it. Btw, the lack of flush for the posted pci
2942                  * write is safe - FR
2943                  */
2944                 smp_wmb();
2945                 RTL_W16(IntrMask, tp->intr_event);
2946         }
2947
2948         return work_done;
2949 }
2950 #endif
2951
2952 static void rtl8169_down(struct net_device *dev)
2953 {
2954         struct rtl8169_private *tp = netdev_priv(dev);
2955         void __iomem *ioaddr = tp->mmio_addr;
2956         unsigned int poll_locked = 0;
2957         unsigned int intrmask;
2958
2959         rtl8169_delete_timer(dev);
2960
2961         netif_stop_queue(dev);
2962
2963 core_down:
2964         spin_lock_irq(&tp->lock);
2965
2966         rtl8169_asic_down(ioaddr);
2967
2968         /* Update the error counts. */
2969         dev->stats.rx_missed_errors += RTL_R32(RxMissed);
2970         RTL_W32(RxMissed, 0);
2971
2972         spin_unlock_irq(&tp->lock);
2973
2974         synchronize_irq(dev->irq);
2975
2976         if (!poll_locked) {
2977                 napi_disable(&tp->napi);
2978                 poll_locked++;
2979         }
2980
2981         /* Give a racing hard_start_xmit a few cycles to complete. */
2982         synchronize_sched();  /* FIXME: should this be synchronize_irq()? */
2983
2984         /*
2985          * And now for the 50k$ question: are IRQ disabled or not ?
2986          *
2987          * Two paths lead here:
2988          * 1) dev->close
2989          *    -> netif_running() is available to sync the current code and the
2990          *       IRQ handler. See rtl8169_interrupt for details.
2991          * 2) dev->change_mtu
2992          *    -> rtl8169_poll can not be issued again and re-enable the
2993          *       interruptions. Let's simply issue the IRQ down sequence again.
2994          *
2995          * No loop if hotpluged or major error (0xffff).
2996          */
2997         intrmask = RTL_R16(IntrMask);
2998         if (intrmask && (intrmask != 0xffff))
2999                 goto core_down;
3000
3001         rtl8169_tx_clear(tp);
3002
3003         rtl8169_rx_clear(tp);
3004 }
3005
3006 static int rtl8169_close(struct net_device *dev)
3007 {
3008         struct rtl8169_private *tp = netdev_priv(dev);
3009         struct pci_dev *pdev = tp->pci_dev;
3010
3011         rtl8169_down(dev);
3012
3013         free_irq(dev->irq, dev);
3014
3015         pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
3016                             tp->RxPhyAddr);
3017         pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
3018                             tp->TxPhyAddr);
3019         tp->TxDescArray = NULL;
3020         tp->RxDescArray = NULL;
3021
3022         return 0;
3023 }
3024
3025 static void rtl_set_rx_mode(struct net_device *dev)
3026 {
3027         struct rtl8169_private *tp = netdev_priv(dev);
3028         void __iomem *ioaddr = tp->mmio_addr;
3029         unsigned long flags;
3030         u32 mc_filter[2];       /* Multicast hash filter */
3031         int rx_mode;
3032         u32 tmp = 0;
3033
3034         if (dev->flags & IFF_PROMISC) {
3035                 /* Unconditionally log net taps. */
3036                 if (netif_msg_link(tp)) {
3037                         printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n",
3038                                dev->name);
3039                 }
3040                 rx_mode =
3041                     AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
3042                     AcceptAllPhys;
3043                 mc_filter[1] = mc_filter[0] = 0xffffffff;
3044         } else if ((dev->mc_count > multicast_filter_limit)
3045                    || (dev->flags & IFF_ALLMULTI)) {
3046                 /* Too many to filter perfectly -- accept all multicasts. */
3047                 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
3048                 mc_filter[1] = mc_filter[0] = 0xffffffff;
3049         } else {
3050                 struct dev_mc_list *mclist;
3051                 unsigned int i;
3052
3053                 rx_mode = AcceptBroadcast | AcceptMyPhys;
3054                 mc_filter[1] = mc_filter[0] = 0;
3055                 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
3056                      i++, mclist = mclist->next) {
3057                         int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
3058                         mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
3059                         rx_mode |= AcceptMulticast;
3060                 }
3061         }
3062
3063         spin_lock_irqsave(&tp->lock, flags);
3064
3065         tmp = rtl8169_rx_config | rx_mode |
3066               (RTL_R32(RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
3067
3068         if ((tp->mac_version == RTL_GIGA_MAC_VER_11) ||
3069             (tp->mac_version == RTL_GIGA_MAC_VER_12) ||
3070             (tp->mac_version == RTL_GIGA_MAC_VER_13) ||
3071             (tp->mac_version == RTL_GIGA_MAC_VER_14) ||
3072             (tp->mac_version == RTL_GIGA_MAC_VER_15) ||
3073             (tp->mac_version == RTL_GIGA_MAC_VER_16) ||
3074             (tp->mac_version == RTL_GIGA_MAC_VER_17)) {
3075                 mc_filter[0] = 0xffffffff;
3076                 mc_filter[1] = 0xffffffff;
3077         }
3078
3079         RTL_W32(MAR0 + 0, mc_filter[0]);
3080         RTL_W32(MAR0 + 4, mc_filter[1]);
3081
3082         RTL_W32(RxConfig, tmp);
3083
3084         spin_unlock_irqrestore(&tp->lock, flags);
3085 }
3086
3087 /**
3088  *  rtl8169_get_stats - Get rtl8169 read/write statistics
3089  *  @dev: The Ethernet Device to get statistics for
3090  *
3091  *  Get TX/RX statistics for rtl8169
3092  */
3093 static struct net_device_stats *rtl8169_get_stats(struct net_device *dev)
3094 {
3095         struct rtl8169_private *tp = netdev_priv(dev);
3096         void __iomem *ioaddr = tp->mmio_addr;
3097         unsigned long flags;
3098
3099         if (netif_running(dev)) {
3100                 spin_lock_irqsave(&tp->lock, flags);
3101                 dev->stats.rx_missed_errors += RTL_R32(RxMissed);
3102                 RTL_W32(RxMissed, 0);
3103                 spin_unlock_irqrestore(&tp->lock, flags);
3104         }
3105
3106         return &dev->stats;
3107 }
3108
3109 #ifdef CONFIG_PM
3110
3111 static int rtl8169_suspend(struct pci_dev *pdev, pm_message_t state)
3112 {
3113         struct net_device *dev = pci_get_drvdata(pdev);
3114         struct rtl8169_private *tp = netdev_priv(dev);
3115         void __iomem *ioaddr = tp->mmio_addr;
3116
3117         if (!netif_running(dev))
3118                 goto out_pci_suspend;
3119
3120         netif_device_detach(dev);
3121         netif_stop_queue(dev);
3122
3123         spin_lock_irq(&tp->lock);
3124
3125         rtl8169_asic_down(ioaddr);
3126
3127         dev->stats.rx_missed_errors += RTL_R32(RxMissed);
3128         RTL_W32(RxMissed, 0);
3129
3130         spin_unlock_irq(&tp->lock);
3131
3132 out_pci_suspend:
3133         pci_save_state(pdev);
3134         pci_enable_wake(pdev, pci_choose_state(pdev, state),
3135                 (tp->features & RTL_FEATURE_WOL) ? 1 : 0);
3136         pci_set_power_state(pdev, pci_choose_state(pdev, state));
3137
3138         return 0;
3139 }
3140
3141 static int rtl8169_resume(struct pci_dev *pdev)
3142 {
3143         struct net_device *dev = pci_get_drvdata(pdev);
3144
3145         pci_set_power_state(pdev, PCI_D0);
3146         pci_restore_state(pdev);
3147         pci_enable_wake(pdev, PCI_D0, 0);
3148
3149         if (!netif_running(dev))
3150                 goto out;
3151
3152         netif_device_attach(dev);
3153
3154         rtl8169_schedule_work(dev, rtl8169_reset_task);
3155 out:
3156         return 0;
3157 }
3158
3159 #endif /* CONFIG_PM */
3160
3161 static struct pci_driver rtl8169_pci_driver = {
3162         .name           = MODULENAME,
3163         .id_table       = rtl8169_pci_tbl,
3164         .probe          = rtl8169_init_one,
3165         .remove         = __devexit_p(rtl8169_remove_one),
3166 #ifdef CONFIG_PM
3167         .suspend        = rtl8169_suspend,
3168         .resume         = rtl8169_resume,
3169 #endif
3170 };
3171
3172 static int __init rtl8169_init_module(void)
3173 {
3174         return pci_register_driver(&rtl8169_pci_driver);
3175 }
3176
3177 static void __exit rtl8169_cleanup_module(void)
3178 {
3179         pci_unregister_driver(&rtl8169_pci_driver);
3180 }
3181
3182 module_init(rtl8169_init_module);
3183 module_exit(rtl8169_cleanup_module);