drivers/net/r8169.c

   1 /*
   2 =========================================================================
   3  r8169.c: A RealTek RTL-8169 Gigabit Ethernet driver for Linux kernel 2.4.x.
   4  --------------------------------------------------------------------
   5
   6  History:
   7  Feb  4 2002    - created initially by ShuChen <shuchen@realtek.com.tw>.
   8  May 20 2002    - Add link status force-mode and TBI mode support.
   9         2004    - Massive updates. See kernel SCM system for details.
  10 =========================================================================
  11   1. [DEPRECATED: use ethtool instead] The media can be forced in 5 modes.
  12          Command: 'insmod r8169 media = SET_MEDIA'
  13          Ex:      'insmod r8169 media = 0x04' will force PHY to operate in 100Mpbs Half-duplex.
  14
  15          SET_MEDIA can be:
  16                 _10_Half        = 0x01
  17                 _10_Full        = 0x02
  18                 _100_Half       = 0x04
  19                 _100_Full       = 0x08
  20                 _1000_Full      = 0x10
  21
  22   2. Support TBI mode.
  23 =========================================================================
  24 VERSION 1.1     <2002/10/4>
  25
  26         The bit4:0 of MII register 4 is called "selector field", and have to be
  27         00001b to indicate support of IEEE std 802.3 during NWay process of
  28         exchanging Link Code Word (FLP).
  29
  30 VERSION 1.2     <2002/11/30>
  31
  32         - Large style cleanup
  33         - Use ether_crc in stock kernel (linux/crc32.h)
  34         - Copy mc_filter setup code from 8139cp
  35           (includes an optimization, and avoids set_bit use)
  36
  37 VERSION 1.6LK   <2004/04/14>
  38
  39         - Merge of Realtek's version 1.6
  40         - Conversion to DMA API
  41         - Suspend/resume
  42         - Endianness
  43         - Misc Rx/Tx bugs
  44
  45 VERSION 2.2LK   <2005/01/25>
  46
  47         - RX csum, TX csum/SG, TSO
  48         - VLAN
  49         - baby (< 7200) Jumbo frames support
  50         - Merge of Realtek's version 2.2 (new phy)
  51  */
  52
  53 #include <linux/module.h>
  54 #include <linux/moduleparam.h>
  55 #include <linux/pci.h>
  56 #include <linux/netdevice.h>
  57 #include <linux/etherdevice.h>
  58 #include <linux/delay.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/mii.h>
  61 #include <linux/if_vlan.h>
  62 #include <linux/crc32.h>
  63 #include <linux/in.h>
  64 #include <linux/ip.h>
  65 #include <linux/tcp.h>
  66 #include <linux/init.h>
  67 #include <linux/dma-mapping.h>
  68
  69 #include <asm/io.h>
  70 #include <asm/irq.h>
  71
  72 #ifdef CONFIG_R8169_NAPI
  73 #define NAPI_SUFFIX     "-NAPI"
  74 #else
  75 #define NAPI_SUFFIX     ""
  76 #endif
  77
  78 #define RTL8169_VERSION "2.2LK" NAPI_SUFFIX
  79 #define MODULENAME "r8169"
  80 #define PFX MODULENAME ": "
  81
  82 #ifdef RTL8169_DEBUG
  83 #define assert(expr) \
  84         if(!(expr)) {                                   \
  85                 printk( "Assertion failed! %s,%s,%s,line=%d\n", \
  86                 #expr,__FILE__,__FUNCTION__,__LINE__);          \
  87         }
  88 #define dprintk(fmt, args...)   do { printk(PFX fmt, ## args); } while (0)
  89 #else
  90 #define assert(expr) do {} while (0)
  91 #define dprintk(fmt, args...)   do {} while (0)
  92 #endif /* RTL8169_DEBUG */
  93
  94 #define R8169_MSG_DEFAULT \
  95         (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | NETIF_MSG_IFUP | \
  96          NETIF_MSG_IFDOWN)
  97
  98 #define TX_BUFFS_AVAIL(tp) \
  99         (tp->dirty_tx + NUM_TX_DESC - tp->cur_tx - 1)
 100
 101 #ifdef CONFIG_R8169_NAPI
 102 #define rtl8169_rx_skb                  netif_receive_skb
 103 #define rtl8169_rx_hwaccel_skb          vlan_hwaccel_rx
 104 #define rtl8169_rx_quota(count, quota)  min(count, quota)
 105 #else
 106 #define rtl8169_rx_skb                  netif_rx
 107 #define rtl8169_rx_hwaccel_skb          vlan_hwaccel_receive_skb
 108 #define rtl8169_rx_quota(count, quota)  count
 109 #endif
 110
 111 /* media options */
 112 #define MAX_UNITS 8
 113 static int media[MAX_UNITS] = { -1, -1, -1, -1, -1, -1, -1, -1 };
 114 static int num_media = 0;
 115
 116 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
 117 static int max_interrupt_work = 20;
 118
 119 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
 120    The RTL chips use a 64 element hash table based on the Ethernet CRC. */
 121 static int multicast_filter_limit = 32;
 122
 123 /* MAC address length */
 124 #define MAC_ADDR_LEN    6
 125
 126 #define RX_FIFO_THRESH  7       /* 7 means NO threshold, Rx buffer level before first PCI xfer. */
 127 #define RX_DMA_BURST    6       /* Maximum PCI burst, '6' is 1024 */
 128 #define TX_DMA_BURST    6       /* Maximum PCI burst, '6' is 1024 */
 129 #define EarlyTxThld     0x3F    /* 0x3F means NO early transmit */
 130 #define RxPacketMaxSize 0x3FE8  /* 16K - 1 - ETH_HLEN - VLAN - CRC... */
 131 #define SafeMtu         0x1c20  /* ... actually life sucks beyond ~7k */
 132 #define InterFrameGap   0x03    /* 3 means InterFrameGap = the shortest one */
 133
 134 #define R8169_REGS_SIZE         256
 135 #define R8169_NAPI_WEIGHT       64
 136 #define NUM_TX_DESC     64      /* Number of Tx descriptor registers */
 137 #define NUM_RX_DESC     256     /* Number of Rx descriptor registers */
 138 #define RX_BUF_SIZE     1536    /* Rx Buffer size */
 139 #define R8169_TX_RING_BYTES     (NUM_TX_DESC * sizeof(struct TxDesc))
 140 #define R8169_RX_RING_BYTES     (NUM_RX_DESC * sizeof(struct RxDesc))
 141
 142 #define RTL8169_TX_TIMEOUT      (6*HZ)
 143 #define RTL8169_PHY_TIMEOUT     (10*HZ)
 144
 145 /* write/read MMIO register */
 146 #define RTL_W8(reg, val8)       writeb ((val8), ioaddr + (reg))
 147 #define RTL_W16(reg, val16)     writew ((val16), ioaddr + (reg))
 148 #define RTL_W32(reg, val32)     writel ((val32), ioaddr + (reg))
 149 #define RTL_R8(reg)             readb (ioaddr + (reg))
 150 #define RTL_R16(reg)            readw (ioaddr + (reg))
 151 #define RTL_R32(reg)            ((unsigned long) readl (ioaddr + (reg)))
 152
 153 enum mac_version {
 154         RTL_GIGA_MAC_VER_B = 0x00,
 155         /* RTL_GIGA_MAC_VER_C = 0x03, */
 156         RTL_GIGA_MAC_VER_D = 0x01,
 157         RTL_GIGA_MAC_VER_E = 0x02,
 158         RTL_GIGA_MAC_VER_X = 0x04       /* Greater than RTL_GIGA_MAC_VER_E */
 159 };
 160
 161 enum phy_version {
 162         RTL_GIGA_PHY_VER_C = 0x03, /* PHY Reg 0x03 bit0-3 == 0x0000 */
 163         RTL_GIGA_PHY_VER_D = 0x04, /* PHY Reg 0x03 bit0-3 == 0x0000 */
 164         RTL_GIGA_PHY_VER_E = 0x05, /* PHY Reg 0x03 bit0-3 == 0x0000 */
 165         RTL_GIGA_PHY_VER_F = 0x06, /* PHY Reg 0x03 bit0-3 == 0x0001 */
 166         RTL_GIGA_PHY_VER_G = 0x07, /* PHY Reg 0x03 bit0-3 == 0x0002 */
 167         RTL_GIGA_PHY_VER_H = 0x08, /* PHY Reg 0x03 bit0-3 == 0x0003 */
 168 };
 169
 170
 171 #define _R(NAME,MAC,MASK) \
 172         { .name = NAME, .mac_version = MAC, .RxConfigMask = MASK }
 173
 174 const static struct {
 175         const char *name;
 176         u8 mac_version;
 177         u32 RxConfigMask;       /* Clears the bits supported by this chip */
 178 } rtl_chip_info[] = {
 179         _R("RTL8169",           RTL_GIGA_MAC_VER_B, 0xff7e1880),
 180         _R("RTL8169s/8110s",    RTL_GIGA_MAC_VER_D, 0xff7e1880),
 181         _R("RTL8169s/8110s",    RTL_GIGA_MAC_VER_E, 0xff7e1880),
 182         _R("RTL8169s/8110s",    RTL_GIGA_MAC_VER_X, 0xff7e1880),
 183 };
 184 #undef _R
 185
 186 static struct pci_device_id rtl8169_pci_tbl[] = {
 187         { PCI_DEVICE(PCI_VENDOR_ID_REALTEK,     0x8169), },
 188         { PCI_DEVICE(PCI_VENDOR_ID_DLINK,       0x4300), },
 189         { PCI_DEVICE(0x16ec,                    0x0116), },
 190         { PCI_VENDOR_ID_LINKSYS,                0x1032, PCI_ANY_ID, 0x0024, },
 191         {0,},
 192 };
 193
 194 MODULE_DEVICE_TABLE(pci, rtl8169_pci_tbl);
 195
 196 static int rx_copybreak = 200;
 197 static int use_dac;
 198 static struct {
 199         u32 msg_enable;
 200 } debug = { -1 };
 201
 202 enum RTL8169_registers {
 203         MAC0 = 0,               /* Ethernet hardware address. */
 204         MAR0 = 8,               /* Multicast filter. */
 205         CounterAddrLow = 0x10,
 206         CounterAddrHigh = 0x14,
 207         TxDescStartAddrLow = 0x20,
 208         TxDescStartAddrHigh = 0x24,
 209         TxHDescStartAddrLow = 0x28,
 210         TxHDescStartAddrHigh = 0x2c,
 211         FLASH = 0x30,
 212         ERSR = 0x36,
 213         ChipCmd = 0x37,
 214         TxPoll = 0x38,
 215         IntrMask = 0x3C,
 216         IntrStatus = 0x3E,
 217         TxConfig = 0x40,
 218         RxConfig = 0x44,
 219         RxMissed = 0x4C,
 220         Cfg9346 = 0x50,
 221         Config0 = 0x51,
 222         Config1 = 0x52,
 223         Config2 = 0x53,
 224         Config3 = 0x54,
 225         Config4 = 0x55,
 226         Config5 = 0x56,
 227         MultiIntr = 0x5C,
 228         PHYAR = 0x60,
 229         TBICSR = 0x64,
 230         TBI_ANAR = 0x68,
 231         TBI_LPAR = 0x6A,
 232         PHYstatus = 0x6C,
 233         RxMaxSize = 0xDA,
 234         CPlusCmd = 0xE0,
 235         IntrMitigate = 0xE2,
 236         RxDescAddrLow = 0xE4,
 237         RxDescAddrHigh = 0xE8,
 238         EarlyTxThres = 0xEC,
 239         FuncEvent = 0xF0,
 240         FuncEventMask = 0xF4,
 241         FuncPresetState = 0xF8,
 242         FuncForceEvent = 0xFC,
 243 };
 244
 245 enum RTL8169_register_content {
 246         /* InterruptStatusBits */
 247         SYSErr = 0x8000,
 248         PCSTimeout = 0x4000,
 249         SWInt = 0x0100,
 250         TxDescUnavail = 0x80,
 251         RxFIFOOver = 0x40,
 252         LinkChg = 0x20,
 253         RxOverflow = 0x10,
 254         TxErr = 0x08,
 255         TxOK = 0x04,
 256         RxErr = 0x02,
 257         RxOK = 0x01,
 258
 259         /* RxStatusDesc */
 260         RxRES = 0x00200000,
 261         RxCRC = 0x00080000,
 262         RxRUNT = 0x00100000,
 263         RxRWT = 0x00400000,
 264
 265         /* ChipCmdBits */
 266         CmdReset = 0x10,
 267         CmdRxEnb = 0x08,
 268         CmdTxEnb = 0x04,
 269         RxBufEmpty = 0x01,
 270
 271         /* Cfg9346Bits */
 272         Cfg9346_Lock = 0x00,
 273         Cfg9346_Unlock = 0xC0,
 274
 275         /* rx_mode_bits */
 276         AcceptErr = 0x20,
 277         AcceptRunt = 0x10,
 278         AcceptBroadcast = 0x08,
 279         AcceptMulticast = 0x04,
 280         AcceptMyPhys = 0x02,
 281         AcceptAllPhys = 0x01,
 282
 283         /* RxConfigBits */
 284         RxCfgFIFOShift = 13,
 285         RxCfgDMAShift = 8,
 286
 287         /* TxConfigBits */
 288         TxInterFrameGapShift = 24,
 289         TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
 290
 291         /* TBICSR p.28 */
 292         TBIReset        = 0x80000000,
 293         TBILoopback     = 0x40000000,
 294         TBINwEnable     = 0x20000000,
 295         TBINwRestart    = 0x10000000,
 296         TBILinkOk       = 0x02000000,
 297         TBINwComplete   = 0x01000000,
 298
 299         /* CPlusCmd p.31 */
 300         RxVlan          = (1 << 6),
 301         RxChkSum        = (1 << 5),
 302         PCIDAC          = (1 << 4),
 303         PCIMulRW        = (1 << 3),
 304
 305         /* rtl8169_PHYstatus */
 306         TBI_Enable = 0x80,
 307         TxFlowCtrl = 0x40,
 308         RxFlowCtrl = 0x20,
 309         _1000bpsF = 0x10,
 310         _100bps = 0x08,
 311         _10bps = 0x04,
 312         LinkStatus = 0x02,
 313         FullDup = 0x01,
 314
 315         /* GIGABIT_PHY_registers */
 316         PHY_CTRL_REG = 0,
 317         PHY_STAT_REG = 1,
 318         PHY_AUTO_NEGO_REG = 4,
 319         PHY_1000_CTRL_REG = 9,
 320
 321         /* GIGABIT_PHY_REG_BIT */
 322         PHY_Restart_Auto_Nego = 0x0200,
 323         PHY_Enable_Auto_Nego = 0x1000,
 324
 325         /* PHY_STAT_REG = 1 */
 326         PHY_Auto_Neco_Comp = 0x0020,
 327
 328         /* PHY_AUTO_NEGO_REG = 4 */
 329         PHY_Cap_10_Half = 0x0020,
 330         PHY_Cap_10_Full = 0x0040,
 331         PHY_Cap_100_Half = 0x0080,
 332         PHY_Cap_100_Full = 0x0100,
 333
 334         /* PHY_1000_CTRL_REG = 9 */
 335         PHY_Cap_1000_Full = 0x0200,
 336
 337         PHY_Cap_Null = 0x0,
 338
 339         /* _MediaType */
 340         _10_Half = 0x01,
 341         _10_Full = 0x02,
 342         _100_Half = 0x04,
 343         _100_Full = 0x08,
 344         _1000_Full = 0x10,
 345
 346         /* _TBICSRBit */
 347         TBILinkOK = 0x02000000,
 348
 349         /* DumpCounterCommand */
 350         CounterDump = 0x8,
 351 };
 352
 353 enum _DescStatusBit {
 354         DescOwn         = (1 << 31), /* Descriptor is owned by NIC */
 355         RingEnd         = (1 << 30), /* End of descriptor ring */
 356         FirstFrag       = (1 << 29), /* First segment of a packet */
 357         LastFrag        = (1 << 28), /* Final segment of a packet */
 358
 359         /* Tx private */
 360         LargeSend       = (1 << 27), /* TCP Large Send Offload (TSO) */
 361         MSSShift        = 16,        /* MSS value position */
 362         MSSMask         = 0xfff,     /* MSS value + LargeSend bit: 12 bits */
 363         IPCS            = (1 << 18), /* Calculate IP checksum */
 364         UDPCS           = (1 << 17), /* Calculate UDP/IP checksum */
 365         TCPCS           = (1 << 16), /* Calculate TCP/IP checksum */
 366         TxVlanTag       = (1 << 17), /* Add VLAN tag */
 367
 368         /* Rx private */
 369         PID1            = (1 << 18), /* Protocol ID bit 1/2 */
 370         PID0            = (1 << 17), /* Protocol ID bit 2/2 */
 371
 372 #define RxProtoUDP      (PID1)
 373 #define RxProtoTCP      (PID0)
 374 #define RxProtoIP       (PID1 | PID0)
 375 #define RxProtoMask     RxProtoIP
 376
 377         IPFail          = (1 << 16), /* IP checksum failed */
 378         UDPFail         = (1 << 15), /* UDP/IP checksum failed */
 379         TCPFail         = (1 << 14), /* TCP/IP checksum failed */
 380         RxVlanTag       = (1 << 16), /* VLAN tag available */
 381 };
 382
 383 #define RsvdMask        0x3fffc000
 384
 385 struct TxDesc {
 386         u32 opts1;
 387         u32 opts2;
 388         u64 addr;
 389 };
 390
 391 struct RxDesc {
 392         u32 opts1;
 393         u32 opts2;
 394         u64 addr;
 395 };
 396
 397 struct ring_info {
 398         struct sk_buff  *skb;
 399         u32             len;
 400         u8              __pad[sizeof(void *) - sizeof(u32)];
 401 };
 402
 403 struct rtl8169_private {
 404         void __iomem *mmio_addr;        /* memory map physical address */
 405         struct pci_dev *pci_dev;        /* Index of PCI device */
 406         struct net_device_stats stats;  /* statistics of net device */
 407         spinlock_t lock;                /* spin lock flag */
 408         u32 msg_enable;
 409         int chipset;
 410         int mac_version;
 411         int phy_version;
 412         u32 cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
 413         u32 cur_tx; /* Index into the Tx descriptor buffer of next Rx pkt. */
 414         u32 dirty_rx;
 415         u32 dirty_tx;
 416         struct TxDesc *TxDescArray;     /* 256-aligned Tx descriptor ring */
 417         struct RxDesc *RxDescArray;     /* 256-aligned Rx descriptor ring */
 418         dma_addr_t TxPhyAddr;
 419         dma_addr_t RxPhyAddr;
 420         struct sk_buff *Rx_skbuff[NUM_RX_DESC]; /* Rx data buffers */
 421         struct ring_info tx_skb[NUM_TX_DESC];   /* Tx data buffers */
 422         unsigned rx_buf_sz;
 423         struct timer_list timer;
 424         u16 cp_cmd;
 425         u16 intr_mask;
 426         int phy_auto_nego_reg;
 427         int phy_1000_ctrl_reg;
 428 #ifdef CONFIG_R8169_VLAN
 429         struct vlan_group *vlgrp;
 430 #endif
 431         int (*set_speed)(struct net_device *, u8 autoneg, u16 speed, u8 duplex);
 432         void (*get_settings)(struct net_device *, struct ethtool_cmd *);
 433         void (*phy_reset_enable)(void __iomem *);
 434         unsigned int (*phy_reset_pending)(void __iomem *);
 435         unsigned int (*link_ok)(void __iomem *);
 436         struct work_struct task;
 437 };
 438
 439 MODULE_AUTHOR("Realtek and the Linux r8169 crew <netdev@vger.kernel.org>");
 440 MODULE_DESCRIPTION("RealTek RTL-8169 Gigabit Ethernet driver");
 441 module_param_array(media, int, &num_media, 0);
 442 MODULE_PARM_DESC(media, "force phy operation. Deprecated by ethtool (8).");
 443 module_param(rx_copybreak, int, 0);
 444 MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
 445 module_param(use_dac, int, 0);
 446 MODULE_PARM_DESC(use_dac, "Enable PCI DAC. Unsafe on 32 bit PCI slot.");
 447 module_param_named(debug, debug.msg_enable, int, 0);
 448 MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
 449 MODULE_LICENSE("GPL");
 450 MODULE_VERSION(RTL8169_VERSION);
 451
 452 static int rtl8169_open(struct net_device *dev);
 453 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev);
 454 static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance,
 455                               struct pt_regs *regs);
 456 static int rtl8169_init_ring(struct net_device *dev);
 457 static void rtl8169_hw_start(struct net_device *dev);
 458 static int rtl8169_close(struct net_device *dev);
 459 static void rtl8169_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 *);
 464 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu);
 465 static void rtl8169_down(struct net_device *dev);
 466
 467 #ifdef CONFIG_R8169_NAPI
 468 static int rtl8169_poll(struct net_device *dev, int *budget);
 469 #endif
 470
 471 static const u16 rtl8169_intr_mask =
 472         SYSErr | LinkChg | RxOverflow | RxFIFOOver | TxErr | TxOK | RxErr | RxOK;
 473 static const u16 rtl8169_napi_event =
 474         RxOK | RxOverflow | RxFIFOOver | TxOK | TxErr;
 475 static const unsigned int rtl8169_rx_config =
 476     (RX_FIFO_THRESH << RxCfgFIFOShift) | (RX_DMA_BURST << RxCfgDMAShift);
 477
 478 #define PHY_Cap_10_Half_Or_Less PHY_Cap_10_Half
 479 #define PHY_Cap_10_Full_Or_Less PHY_Cap_10_Full | PHY_Cap_10_Half_Or_Less
 480 #define PHY_Cap_100_Half_Or_Less PHY_Cap_100_Half | PHY_Cap_10_Full_Or_Less
 481 #define PHY_Cap_100_Full_Or_Less PHY_Cap_100_Full | PHY_Cap_100_Half_Or_Less
 482
 483 static void mdio_write(void __iomem *ioaddr, int RegAddr, int value)
 484 {
 485         int i;
 486
 487         RTL_W32(PHYAR, 0x80000000 | (RegAddr & 0xFF) << 16 | value);
 488         udelay(1000);
 489
 490         for (i = 2000; i > 0; i--) {
 491                 /* Check if the RTL8169 has completed writing to the specified MII register */
 492                 if (!(RTL_R32(PHYAR) & 0x80000000))
 493                         break;
 494                 udelay(100);
 495         }
 496 }
 497
 498 static int mdio_read(void __iomem *ioaddr, int RegAddr)
 499 {
 500         int i, value = -1;
 501
 502         RTL_W32(PHYAR, 0x0 | (RegAddr & 0xFF) << 16);
 503         udelay(1000);
 504
 505         for (i = 2000; i > 0; i--) {
 506                 /* Check if the RTL8169 has completed retrieving data from the specified MII register */
 507                 if (RTL_R32(PHYAR) & 0x80000000) {
 508                         value = (int) (RTL_R32(PHYAR) & 0xFFFF);
 509                         break;
 510                 }
 511                 udelay(100);
 512         }
 513         return value;
 514 }
 515
 516 static void rtl8169_irq_mask_and_ack(void __iomem *ioaddr)
 517 {
 518         RTL_W16(IntrMask, 0x0000);
 519
 520         RTL_W16(IntrStatus, 0xffff);
 521 }
 522
 523 static void rtl8169_asic_down(void __iomem *ioaddr)
 524 {
 525         RTL_W8(ChipCmd, 0x00);
 526         rtl8169_irq_mask_and_ack(ioaddr);
 527         RTL_R16(CPlusCmd);
 528 }
 529
 530 static unsigned int rtl8169_tbi_reset_pending(void __iomem *ioaddr)
 531 {
 532         return RTL_R32(TBICSR) & TBIReset;
 533 }
 534
 535 static unsigned int rtl8169_xmii_reset_pending(void __iomem *ioaddr)
 536 {
 537         return mdio_read(ioaddr, 0) & 0x8000;
 538 }
 539
 540 static unsigned int rtl8169_tbi_link_ok(void __iomem *ioaddr)
 541 {
 542         return RTL_R32(TBICSR) & TBILinkOk;
 543 }
 544
 545 static unsigned int rtl8169_xmii_link_ok(void __iomem *ioaddr)
 546 {
 547         return RTL_R8(PHYstatus) & LinkStatus;
 548 }
 549
 550 static void rtl8169_tbi_reset_enable(void __iomem *ioaddr)
 551 {
 552         RTL_W32(TBICSR, RTL_R32(TBICSR) | TBIReset);
 553 }
 554
 555 static void rtl8169_xmii_reset_enable(void __iomem *ioaddr)
 556 {
 557         unsigned int val;
 558
 559         val = (mdio_read(ioaddr, PHY_CTRL_REG) | 0x8000) & 0xffff;
 560         mdio_write(ioaddr, PHY_CTRL_REG, val);
 561 }
 562
 563 static void rtl8169_check_link_status(struct net_device *dev,
 564                                       struct rtl8169_private *tp, void __iomem *ioaddr)
 565 {
 566         unsigned long flags;
 567
 568         spin_lock_irqsave(&tp->lock, flags);
 569         if (tp->link_ok(ioaddr)) {
 570                 netif_carrier_on(dev);
 571                 if (netif_msg_ifup(tp))
 572                         printk(KERN_INFO PFX "%s: link up\n", dev->name);
 573         } else {
 574                 if (netif_msg_ifdown(tp))
 575                         printk(KERN_INFO PFX "%s: link down\n", dev->name);
 576                 netif_carrier_off(dev);
 577         }
 578         spin_unlock_irqrestore(&tp->lock, flags);
 579 }
 580
 581 static void rtl8169_link_option(int idx, u8 *autoneg, u16 *speed, u8 *duplex)
 582 {
 583         struct {
 584                 u16 speed;
 585                 u8 duplex;
 586                 u8 autoneg;
 587                 u8 media;
 588         } link_settings[] = {
 589                 { SPEED_10,     DUPLEX_HALF, AUTONEG_DISABLE,   _10_Half },
 590                 { SPEED_10,     DUPLEX_FULL, AUTONEG_DISABLE,   _10_Full },
 591                 { SPEED_100,    DUPLEX_HALF, AUTONEG_DISABLE,   _100_Half },
 592                 { SPEED_100,    DUPLEX_FULL, AUTONEG_DISABLE,   _100_Full },
 593                 { SPEED_1000,   DUPLEX_FULL, AUTONEG_DISABLE,   _1000_Full },
 594                 /* Make TBI happy */
 595                 { SPEED_1000,   DUPLEX_FULL, AUTONEG_ENABLE,    0xff }
 596         }, *p;
 597         unsigned char option;
 598
 599         option = ((idx < MAX_UNITS) && (idx >= 0)) ? media[idx] : 0xff;
 600
 601         if ((option != 0xff) && !idx && netif_msg_drv(&debug))
 602                 printk(KERN_WARNING PFX "media option is deprecated.\n");
 603
 604         for (p = link_settings; p->media != 0xff; p++) {
 605                 if (p->media == option)
 606                         break;
 607         }
 608         *autoneg = p->autoneg;
 609         *speed = p->speed;
 610         *duplex = p->duplex;
 611 }
 612
 613 static void rtl8169_get_drvinfo(struct net_device *dev,
 614                                 struct ethtool_drvinfo *info)
 615 {
 616         struct rtl8169_private *tp = netdev_priv(dev);
 617
 618         strcpy(info->driver, MODULENAME);
 619         strcpy(info->version, RTL8169_VERSION);
 620         strcpy(info->bus_info, pci_name(tp->pci_dev));
 621 }
 622
 623 static int rtl8169_get_regs_len(struct net_device *dev)
 624 {
 625         return R8169_REGS_SIZE;
 626 }
 627
 628 static int rtl8169_set_speed_tbi(struct net_device *dev,
 629                                  u8 autoneg, u16 speed, u8 duplex)
 630 {
 631         struct rtl8169_private *tp = netdev_priv(dev);
 632         void __iomem *ioaddr = tp->mmio_addr;
 633         int ret = 0;
 634         u32 reg;
 635
 636         reg = RTL_R32(TBICSR);
 637         if ((autoneg == AUTONEG_DISABLE) && (speed == SPEED_1000) &&
 638             (duplex == DUPLEX_FULL)) {
 639                 RTL_W32(TBICSR, reg & ~(TBINwEnable | TBINwRestart));
 640         } else if (autoneg == AUTONEG_ENABLE)
 641                 RTL_W32(TBICSR, reg | TBINwEnable | TBINwRestart);
 642         else {
 643                 if (netif_msg_link(tp)) {
 644                         printk(KERN_WARNING "%s: "
 645                                "incorrect speed setting refused in TBI mode\n",
 646                                dev->name);
 647                 }
 648                 ret = -EOPNOTSUPP;
 649         }
 650
 651         return ret;
 652 }
 653
 654 static int rtl8169_set_speed_xmii(struct net_device *dev,
 655                                   u8 autoneg, u16 speed, u8 duplex)
 656 {
 657         struct rtl8169_private *tp = netdev_priv(dev);
 658         void __iomem *ioaddr = tp->mmio_addr;
 659         int auto_nego, giga_ctrl;
 660
 661         auto_nego = mdio_read(ioaddr, PHY_AUTO_NEGO_REG);
 662         auto_nego &= ~(PHY_Cap_10_Half | PHY_Cap_10_Full |
 663                        PHY_Cap_100_Half | PHY_Cap_100_Full);
 664         giga_ctrl = mdio_read(ioaddr, PHY_1000_CTRL_REG);
 665         giga_ctrl &= ~(PHY_Cap_1000_Full | PHY_Cap_Null);
 666
 667         if (autoneg == AUTONEG_ENABLE) {
 668                 auto_nego |= (PHY_Cap_10_Half | PHY_Cap_10_Full |
 669                               PHY_Cap_100_Half | PHY_Cap_100_Full);
 670                 giga_ctrl |= PHY_Cap_1000_Full;
 671         } else {
 672                 if (speed == SPEED_10)
 673                         auto_nego |= PHY_Cap_10_Half | PHY_Cap_10_Full;
 674                 else if (speed == SPEED_100)
 675                         auto_nego |= PHY_Cap_100_Half | PHY_Cap_100_Full;
 676                 else if (speed == SPEED_1000)
 677                         giga_ctrl |= PHY_Cap_1000_Full;
 678
 679                 if (duplex == DUPLEX_HALF)
 680                         auto_nego &= ~(PHY_Cap_10_Full | PHY_Cap_100_Full);
 681         }
 682
 683         tp->phy_auto_nego_reg = auto_nego;
 684         tp->phy_1000_ctrl_reg = giga_ctrl;
 685
 686         mdio_write(ioaddr, PHY_AUTO_NEGO_REG, auto_nego);
 687         mdio_write(ioaddr, PHY_1000_CTRL_REG, giga_ctrl);
 688         mdio_write(ioaddr, PHY_CTRL_REG, PHY_Enable_Auto_Nego |
 689                                          PHY_Restart_Auto_Nego);
 690         return 0;
 691 }
 692
 693 static int rtl8169_set_speed(struct net_device *dev,
 694                              u8 autoneg, u16 speed, u8 duplex)
 695 {
 696         struct rtl8169_private *tp = netdev_priv(dev);
 697         int ret;
 698
 699         ret = tp->set_speed(dev, autoneg, speed, duplex);
 700
 701         if (netif_running(dev) && (tp->phy_1000_ctrl_reg & PHY_Cap_1000_Full))
 702                 mod_timer(&tp->timer, jiffies + RTL8169_PHY_TIMEOUT);
 703
 704         return ret;
 705 }
 706
 707 static int rtl8169_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 708 {
 709         struct rtl8169_private *tp = netdev_priv(dev);
 710         unsigned long flags;
 711         int ret;
 712
 713         spin_lock_irqsave(&tp->lock, flags);
 714         ret = rtl8169_set_speed(dev, cmd->autoneg, cmd->speed, cmd->duplex);
 715         spin_unlock_irqrestore(&tp->lock, flags);
 716
 717         return ret;
 718 }
 719
 720 static u32 rtl8169_get_rx_csum(struct net_device *dev)
 721 {
 722         struct rtl8169_private *tp = netdev_priv(dev);
 723
 724         return tp->cp_cmd & RxChkSum;
 725 }
 726
 727 static int rtl8169_set_rx_csum(struct net_device *dev, u32 data)
 728 {
 729         struct rtl8169_private *tp = netdev_priv(dev);
 730         void __iomem *ioaddr = tp->mmio_addr;
 731         unsigned long flags;
 732
 733         spin_lock_irqsave(&tp->lock, flags);
 734
 735         if (data)
 736                 tp->cp_cmd |= RxChkSum;
 737         else
 738                 tp->cp_cmd &= ~RxChkSum;
 739
 740         RTL_W16(CPlusCmd, tp->cp_cmd);
 741         RTL_R16(CPlusCmd);
 742
 743         spin_unlock_irqrestore(&tp->lock, flags);
 744
 745         return 0;
 746 }
 747
 748 #ifdef CONFIG_R8169_VLAN
 749
 750 static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
 751                                       struct sk_buff *skb)
 752 {
 753         return (tp->vlgrp && vlan_tx_tag_present(skb)) ?
 754                 TxVlanTag | swab16(vlan_tx_tag_get(skb)) : 0x00;
 755 }
 756
 757 static void rtl8169_vlan_rx_register(struct net_device *dev,
 758                                      struct vlan_group *grp)
 759 {
 760         struct rtl8169_private *tp = netdev_priv(dev);
 761         void __iomem *ioaddr = tp->mmio_addr;
 762         unsigned long flags;
 763
 764         spin_lock_irqsave(&tp->lock, flags);
 765         tp->vlgrp = grp;
 766         if (tp->vlgrp)
 767                 tp->cp_cmd |= RxVlan;
 768         else
 769                 tp->cp_cmd &= ~RxVlan;
 770         RTL_W16(CPlusCmd, tp->cp_cmd);
 771         RTL_R16(CPlusCmd);
 772         spin_unlock_irqrestore(&tp->lock, flags);
 773 }
 774
 775 static void rtl8169_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 776 {
 777         struct rtl8169_private *tp = netdev_priv(dev);
 778         unsigned long flags;
 779
 780         spin_lock_irqsave(&tp->lock, flags);
 781         if (tp->vlgrp)
 782                 tp->vlgrp->vlan_devices[vid] = NULL;
 783         spin_unlock_irqrestore(&tp->lock, flags);
 784 }
 785
 786 static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc,
 787                                struct sk_buff *skb)
 788 {
 789         u32 opts2 = le32_to_cpu(desc->opts2);
 790         int ret;
 791
 792         if (tp->vlgrp && (opts2 & RxVlanTag)) {
 793                 rtl8169_rx_hwaccel_skb(skb, tp->vlgrp,
 794                                        swab16(opts2 & 0xffff));
 795                 ret = 0;
 796         } else
 797                 ret = -1;
 798         desc->opts2 = 0;
 799         return ret;
 800 }
 801
 802 #else /* !CONFIG_R8169_VLAN */
 803
 804 static inline u32 rtl8169_tx_vlan_tag(struct rtl8169_private *tp,
 805                                       struct sk_buff *skb)
 806 {
 807         return 0;
 808 }
 809
 810 static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc,
 811                                struct sk_buff *skb)
 812 {
 813         return -1;
 814 }
 815
 816 #endif
 817
 818 static void rtl8169_gset_tbi(struct net_device *dev, struct ethtool_cmd *cmd)
 819 {
 820         struct rtl8169_private *tp = netdev_priv(dev);
 821         void __iomem *ioaddr = tp->mmio_addr;
 822         u32 status;
 823
 824         cmd->supported =
 825                 SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE;
 826         cmd->port = PORT_FIBRE;
 827         cmd->transceiver = XCVR_INTERNAL;
 828
 829         status = RTL_R32(TBICSR);
 830         cmd->advertising = (status & TBINwEnable) ?  ADVERTISED_Autoneg : 0;
 831         cmd->autoneg = !!(status & TBINwEnable);
 832
 833         cmd->speed = SPEED_1000;
 834         cmd->duplex = DUPLEX_FULL; /* Always set */
 835 }
 836
 837 static void rtl8169_gset_xmii(struct net_device *dev, struct ethtool_cmd *cmd)
 838 {
 839         struct rtl8169_private *tp = netdev_priv(dev);
 840         void __iomem *ioaddr = tp->mmio_addr;
 841         u8 status;
 842
 843         cmd->supported = SUPPORTED_10baseT_Half |
 844                          SUPPORTED_10baseT_Full |
 845                          SUPPORTED_100baseT_Half |
 846                          SUPPORTED_100baseT_Full |
 847                          SUPPORTED_1000baseT_Full |
 848                          SUPPORTED_Autoneg |
 849                          SUPPORTED_TP;
 850
 851         cmd->autoneg = 1;
 852         cmd->advertising = ADVERTISED_TP | ADVERTISED_Autoneg;
 853
 854         if (tp->phy_auto_nego_reg & PHY_Cap_10_Half)
 855                 cmd->advertising |= ADVERTISED_10baseT_Half;
 856         if (tp->phy_auto_nego_reg & PHY_Cap_10_Full)
 857                 cmd->advertising |= ADVERTISED_10baseT_Full;
 858         if (tp->phy_auto_nego_reg & PHY_Cap_100_Half)
 859                 cmd->advertising |= ADVERTISED_100baseT_Half;
 860         if (tp->phy_auto_nego_reg & PHY_Cap_100_Full)
 861                 cmd->advertising |= ADVERTISED_100baseT_Full;
 862         if (tp->phy_1000_ctrl_reg & PHY_Cap_1000_Full)
 863                 cmd->advertising |= ADVERTISED_1000baseT_Full;
 864
 865         status = RTL_R8(PHYstatus);
 866
 867         if (status & _1000bpsF)
 868                 cmd->speed = SPEED_1000;
 869         else if (status & _100bps)
 870                 cmd->speed = SPEED_100;
 871         else if (status & _10bps)
 872                 cmd->speed = SPEED_10;
 873
 874         cmd->duplex = ((status & _1000bpsF) || (status & FullDup)) ?
 875                       DUPLEX_FULL : DUPLEX_HALF;
 876 }
 877
 878 static int rtl8169_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 879 {
 880         struct rtl8169_private *tp = netdev_priv(dev);
 881         unsigned long flags;
 882
 883         spin_lock_irqsave(&tp->lock, flags);
 884
 885         tp->get_settings(dev, cmd);
 886
 887         spin_unlock_irqrestore(&tp->lock, flags);
 888         return 0;
 889 }
 890
 891 static void rtl8169_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 892                              void *p)
 893 {
 894         struct rtl8169_private *tp = netdev_priv(dev);
 895         unsigned long flags;
 896
 897         if (regs->len > R8169_REGS_SIZE)
 898                 regs->len = R8169_REGS_SIZE;
 899
 900         spin_lock_irqsave(&tp->lock, flags);
 901         memcpy_fromio(p, tp->mmio_addr, regs->len);
 902         spin_unlock_irqrestore(&tp->lock, flags);
 903 }
 904
 905 static u32 rtl8169_get_msglevel(struct net_device *dev)
 906 {
 907         struct rtl8169_private *tp = netdev_priv(dev);
 908
 909         return tp->msg_enable;
 910 }
 911
 912 static void rtl8169_set_msglevel(struct net_device *dev, u32 value)
 913 {
 914         struct rtl8169_private *tp = netdev_priv(dev);
 915
 916         tp->msg_enable = value;
 917 }
 918
 919 static const char rtl8169_gstrings[][ETH_GSTRING_LEN] = {
 920         "tx_packets",
 921         "rx_packets",
 922         "tx_errors",
 923         "rx_errors",
 924         "rx_missed",
 925         "align_errors",
 926         "tx_single_collisions",
 927         "tx_multi_collisions",
 928         "unicast",
 929         "broadcast",
 930         "multicast",
 931         "tx_aborted",
 932         "tx_underrun",
 933 };
 934
 935 struct rtl8169_counters {
 936         u64     tx_packets;
 937         u64     rx_packets;
 938         u64     tx_errors;
 939         u32     rx_errors;
 940         u16     rx_missed;
 941         u16     align_errors;
 942         u32     tx_one_collision;
 943         u32     tx_multi_collision;
 944         u64     rx_unicast;
 945         u64     rx_broadcast;
 946         u32     rx_multicast;
 947         u16     tx_aborted;
 948         u16     tx_underun;
 949 };
 950
 951 static int rtl8169_get_stats_count(struct net_device *dev)
 952 {
 953         return ARRAY_SIZE(rtl8169_gstrings);
 954 }
 955
 956 static void rtl8169_get_ethtool_stats(struct net_device *dev,
 957                                       struct ethtool_stats *stats, u64 *data)
 958 {
 959         struct rtl8169_private *tp = netdev_priv(dev);
 960         void __iomem *ioaddr = tp->mmio_addr;
 961         struct rtl8169_counters *counters;
 962         dma_addr_t paddr;
 963         u32 cmd;
 964
 965         ASSERT_RTNL();
 966
 967         counters = pci_alloc_consistent(tp->pci_dev, sizeof(*counters), &paddr);
 968         if (!counters)
 969                 return;
 970
 971         RTL_W32(CounterAddrHigh, (u64)paddr >> 32);
 972         cmd = (u64)paddr & DMA_32BIT_MASK;
 973         RTL_W32(CounterAddrLow, cmd);
 974         RTL_W32(CounterAddrLow, cmd | CounterDump);
 975
 976         while (RTL_R32(CounterAddrLow) & CounterDump) {
 977                 if (msleep_interruptible(1))
 978                         break;
 979         }
 980
 981         RTL_W32(CounterAddrLow, 0);
 982         RTL_W32(CounterAddrHigh, 0);
 983
 984         data[0] = le64_to_cpu(counters->tx_packets);
 985         data[1] = le64_to_cpu(counters->rx_packets);
 986         data[2] = le64_to_cpu(counters->tx_errors);
 987         data[3] = le32_to_cpu(counters->rx_errors);
 988         data[4] = le16_to_cpu(counters->rx_missed);
 989         data[5] = le16_to_cpu(counters->align_errors);
 990         data[6] = le32_to_cpu(counters->tx_one_collision);
 991         data[7] = le32_to_cpu(counters->tx_multi_collision);
 992         data[8] = le64_to_cpu(counters->rx_unicast);
 993         data[9] = le64_to_cpu(counters->rx_broadcast);
 994         data[10] = le32_to_cpu(counters->rx_multicast);
 995         data[11] = le16_to_cpu(counters->tx_aborted);
 996         data[12] = le16_to_cpu(counters->tx_underun);
 997
 998         pci_free_consistent(tp->pci_dev, sizeof(*counters), counters, paddr);
 999 }
1000
1001 static void rtl8169_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1002 {
1003         switch(stringset) {
1004         case ETH_SS_STATS:
1005                 memcpy(data, *rtl8169_gstrings, sizeof(rtl8169_gstrings));
1006                 break;
1007         }
1008 }
1009
1010
1011 static struct ethtool_ops rtl8169_ethtool_ops = {
1012         .get_drvinfo            = rtl8169_get_drvinfo,
1013         .get_regs_len           = rtl8169_get_regs_len,
1014         .get_link               = ethtool_op_get_link,
1015         .get_settings           = rtl8169_get_settings,
1016         .set_settings           = rtl8169_set_settings,
1017         .get_msglevel           = rtl8169_get_msglevel,
1018         .set_msglevel           = rtl8169_set_msglevel,
1019         .get_rx_csum            = rtl8169_get_rx_csum,
1020         .set_rx_csum            = rtl8169_set_rx_csum,
1021         .get_tx_csum            = ethtool_op_get_tx_csum,
1022         .set_tx_csum            = ethtool_op_set_tx_csum,
1023         .get_sg                 = ethtool_op_get_sg,
1024         .set_sg                 = ethtool_op_set_sg,
1025         .get_tso                = ethtool_op_get_tso,
1026         .set_tso                = ethtool_op_set_tso,
1027         .get_regs               = rtl8169_get_regs,
1028         .get_strings            = rtl8169_get_strings,
1029         .get_stats_count        = rtl8169_get_stats_count,
1030         .get_ethtool_stats      = rtl8169_get_ethtool_stats,
1031 };
1032
1033 static void rtl8169_write_gmii_reg_bit(void __iomem *ioaddr, int reg, int bitnum,
1034                                        int bitval)
1035 {
1036         int val;
1037
1038         val = mdio_read(ioaddr, reg);
1039         val = (bitval == 1) ?
1040                 val | (bitval << bitnum) :  val & ~(0x0001 << bitnum);
1041         mdio_write(ioaddr, reg, val & 0xffff);
1042 }
1043
1044 static void rtl8169_get_mac_version(struct rtl8169_private *tp, void __iomem *ioaddr)
1045 {
1046         const struct {
1047                 u32 mask;
1048                 int mac_version;
1049         } mac_info[] = {
1050                 { 0x1 << 28,    RTL_GIGA_MAC_VER_X },
1051                 { 0x1 << 26,    RTL_GIGA_MAC_VER_E },
1052                 { 0x1 << 23,    RTL_GIGA_MAC_VER_D },
1053                 { 0x00000000,   RTL_GIGA_MAC_VER_B } /* Catch-all */
1054         }, *p = mac_info;
1055         u32 reg;
1056
1057         reg = RTL_R32(TxConfig) & 0x7c800000;
1058         while ((reg & p->mask) != p->mask)
1059                 p++;
1060         tp->mac_version = p->mac_version;
1061 }
1062
1063 static void rtl8169_print_mac_version(struct rtl8169_private *tp)
1064 {
1065         struct {
1066                 int version;
1067                 char *msg;
1068         } mac_print[] = {
1069                 { RTL_GIGA_MAC_VER_E, "RTL_GIGA_MAC_VER_E" },
1070                 { RTL_GIGA_MAC_VER_D, "RTL_GIGA_MAC_VER_D" },
1071                 { RTL_GIGA_MAC_VER_B, "RTL_GIGA_MAC_VER_B" },
1072                 { 0, NULL }
1073         }, *p;
1074
1075         for (p = mac_print; p->msg; p++) {
1076                 if (tp->mac_version == p->version) {
1077                         dprintk("mac_version == %s (%04d)\n", p->msg,
1078                                   p->version);
1079                         return;
1080                 }
1081         }
1082         dprintk("mac_version == Unknown\n");
1083 }
1084
1085 static void rtl8169_get_phy_version(struct rtl8169_private *tp, void __iomem *ioaddr)
1086 {
1087         const struct {
1088                 u16 mask;
1089                 u16 set;
1090                 int phy_version;
1091         } phy_info[] = {
1092                 { 0x000f, 0x0002, RTL_GIGA_PHY_VER_G },
1093                 { 0x000f, 0x0001, RTL_GIGA_PHY_VER_F },
1094                 { 0x000f, 0x0000, RTL_GIGA_PHY_VER_E },
1095                 { 0x0000, 0x0000, RTL_GIGA_PHY_VER_D } /* Catch-all */
1096         }, *p = phy_info;
1097         u16 reg;
1098
1099         reg = mdio_read(ioaddr, 3) & 0xffff;
1100         while ((reg & p->mask) != p->set)
1101                 p++;
1102         tp->phy_version = p->phy_version;
1103 }
1104
1105 static void rtl8169_print_phy_version(struct rtl8169_private *tp)
1106 {
1107         struct {
1108                 int version;
1109                 char *msg;
1110                 u32 reg;
1111         } phy_print[] = {
1112                 { RTL_GIGA_PHY_VER_G, "RTL_GIGA_PHY_VER_G", 0x0002 },
1113                 { RTL_GIGA_PHY_VER_F, "RTL_GIGA_PHY_VER_F", 0x0001 },
1114                 { RTL_GIGA_PHY_VER_E, "RTL_GIGA_PHY_VER_E", 0x0000 },
1115                 { RTL_GIGA_PHY_VER_D, "RTL_GIGA_PHY_VER_D", 0x0000 },
1116                 { 0, NULL, 0x0000 }
1117         }, *p;
1118
1119         for (p = phy_print; p->msg; p++) {
1120                 if (tp->phy_version == p->version) {
1121                         dprintk("phy_version == %s (%04x)\n", p->msg, p->reg);
1122                         return;
1123                 }
1124         }
1125         dprintk("phy_version == Unknown\n");
1126 }
1127
1128 static void rtl8169_hw_phy_config(struct net_device *dev)
1129 {
1130         struct rtl8169_private *tp = netdev_priv(dev);
1131         void __iomem *ioaddr = tp->mmio_addr;
1132         struct {
1133                 u16 regs[5]; /* Beware of bit-sign propagation */
1134         } phy_magic[5] = { {
1135                 { 0x0000,       //w 4 15 12 0
1136                   0x00a1,       //w 3 15 0 00a1
1137                   0x0008,       //w 2 15 0 0008
1138                   0x1020,       //w 1 15 0 1020
1139                   0x1000 } },{  //w 0 15 0 1000
1140                 { 0x7000,       //w 4 15 12 7
1141                   0xff41,       //w 3 15 0 ff41
1142                   0xde60,       //w 2 15 0 de60
1143                   0x0140,       //w 1 15 0 0140
1144                   0x0077 } },{  //w 0 15 0 0077
1145                 { 0xa000,       //w 4 15 12 a
1146                   0xdf01,       //w 3 15 0 df01
1147                   0xdf20,       //w 2 15 0 df20
1148                   0xff95,       //w 1 15 0 ff95
1149                   0xfa00 } },{  //w 0 15 0 fa00
1150                 { 0xb000,       //w 4 15 12 b
1151                   0xff41,       //w 3 15 0 ff41
1152                   0xde20,       //w 2 15 0 de20
1153                   0x0140,       //w 1 15 0 0140
1154                   0x00bb } },{  //w 0 15 0 00bb
1155                 { 0xf000,       //w 4 15 12 f
1156                   0xdf01,       //w 3 15 0 df01
1157                   0xdf20,       //w 2 15 0 df20
1158                   0xff95,       //w 1 15 0 ff95
1159                   0xbf00 }      //w 0 15 0 bf00
1160                 }
1161         }, *p = phy_magic;
1162         int i;
1163
1164         rtl8169_print_mac_version(tp);
1165         rtl8169_print_phy_version(tp);
1166
1167         if (tp->mac_version <= RTL_GIGA_MAC_VER_B)
1168                 return;
1169         if (tp->phy_version >= RTL_GIGA_PHY_VER_H)
1170                 return;
1171
1172         dprintk("MAC version != 0 && PHY version == 0 or 1\n");
1173         dprintk("Do final_reg2.cfg\n");
1174
1175         /* Shazam ! */
1176
1177         if (tp->mac_version == RTL_GIGA_MAC_VER_X) {
1178                 mdio_write(ioaddr, 31, 0x0001);
1179                 mdio_write(ioaddr,  9, 0x273a);
1180                 mdio_write(ioaddr, 14, 0x7bfb);
1181                 mdio_write(ioaddr, 27, 0x841e);
1182
1183                 mdio_write(ioaddr, 31, 0x0002);
1184                 mdio_write(ioaddr,  1, 0x90d0);
1185                 mdio_write(ioaddr, 31, 0x0000);
1186                 return;
1187         }
1188
1189         /* phy config for RTL8169s mac_version C chip */
1190         mdio_write(ioaddr, 31, 0x0001);                 //w 31 2 0 1
1191         mdio_write(ioaddr, 21, 0x1000);                 //w 21 15 0 1000
1192         mdio_write(ioaddr, 24, 0x65c7);                 //w 24 15 0 65c7
1193         rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0);   //w 4 11 11 0
1194
1195         for (i = 0; i < ARRAY_SIZE(phy_magic); i++, p++) {
1196                 int val, pos = 4;
1197
1198                 val = (mdio_read(ioaddr, pos) & 0x0fff) | (p->regs[0] & 0xffff);
1199                 mdio_write(ioaddr, pos, val);
1200                 while (--pos >= 0)
1201                         mdio_write(ioaddr, pos, p->regs[4 - pos] & 0xffff);
1202                 rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 1); //w 4 11 11 1
1203                 rtl8169_write_gmii_reg_bit(ioaddr, 4, 11, 0); //w 4 11 11 0
1204         }
1205         mdio_write(ioaddr, 31, 0x0000); //w 31 2 0 0
1206 }
1207
1208 static void rtl8169_phy_timer(unsigned long __opaque)
1209 {
1210         struct net_device *dev = (struct net_device *)__opaque;
1211         struct rtl8169_private *tp = netdev_priv(dev);
1212         struct timer_list *timer = &tp->timer;
1213         void __iomem *ioaddr = tp->mmio_addr;
1214         unsigned long timeout = RTL8169_PHY_TIMEOUT;
1215
1216         assert(tp->mac_version > RTL_GIGA_MAC_VER_B);
1217         assert(tp->phy_version < RTL_GIGA_PHY_VER_H);
1218
1219         if (!(tp->phy_1000_ctrl_reg & PHY_Cap_1000_Full))
1220                 return;
1221
1222         spin_lock_irq(&tp->lock);
1223
1224         if (tp->phy_reset_pending(ioaddr)) {
1225                 /*
1226                  * A busy loop could burn quite a few cycles on nowadays CPU.
1227                  * Let's delay the execution of the timer for a few ticks.
1228                  */
1229                 timeout = HZ/10;
1230                 goto out_mod_timer;
1231         }
1232
1233         if (tp->link_ok(ioaddr))
1234                 goto out_unlock;
1235
1236         if (netif_msg_link(tp))
1237                 printk(KERN_WARNING "%s: PHY reset until link up\n", dev->name);
1238
1239         tp->phy_reset_enable(ioaddr);
1240
1241 out_mod_timer:
1242         mod_timer(timer, jiffies + timeout);
1243 out_unlock:
1244         spin_unlock_irq(&tp->lock);
1245 }
1246
1247 static inline void rtl8169_delete_timer(struct net_device *dev)
1248 {
1249         struct rtl8169_private *tp = netdev_priv(dev);
1250         struct timer_list *timer = &tp->timer;
1251
1252         if ((tp->mac_version <= RTL_GIGA_MAC_VER_B) ||
1253             (tp->phy_version >= RTL_GIGA_PHY_VER_H))
1254                 return;
1255
1256         del_timer_sync(timer);
1257 }
1258
1259 static inline void rtl8169_request_timer(struct net_device *dev)
1260 {
1261         struct rtl8169_private *tp = netdev_priv(dev);
1262         struct timer_list *timer = &tp->timer;
1263
1264         if ((tp->mac_version <= RTL_GIGA_MAC_VER_B) ||
1265             (tp->phy_version >= RTL_GIGA_PHY_VER_H))
1266                 return;
1267
1268         init_timer(timer);
1269         timer->expires = jiffies + RTL8169_PHY_TIMEOUT;
1270         timer->data = (unsigned long)(dev);
1271         timer->function = rtl8169_phy_timer;
1272         add_timer(timer);
1273 }
1274
1275 #ifdef CONFIG_NET_POLL_CONTROLLER
1276 /*
1277  * Polling 'interrupt' - used by things like netconsole to send skbs
1278  * without having to re-enable interrupts. It's not called while
1279  * the interrupt routine is executing.
1280  */
1281 static void rtl8169_netpoll(struct net_device *dev)
1282 {
1283         struct rtl8169_private *tp = netdev_priv(dev);
1284         struct pci_dev *pdev = tp->pci_dev;
1285
1286         disable_irq(pdev->irq);
1287         rtl8169_interrupt(pdev->irq, dev, NULL);
1288         enable_irq(pdev->irq);
1289 }
1290 #endif
1291
1292 static void rtl8169_release_board(struct pci_dev *pdev, struct net_device *dev,
1293                                   void __iomem *ioaddr)
1294 {
1295         iounmap(ioaddr);
1296         pci_release_regions(pdev);
1297         pci_disable_device(pdev);
1298         free_netdev(dev);
1299 }
1300
1301 static int __devinit
1302 rtl8169_init_board(struct pci_dev *pdev, struct net_device **dev_out,
1303                    void __iomem **ioaddr_out)
1304 {
1305         void __iomem *ioaddr;
1306         struct net_device *dev;
1307         struct rtl8169_private *tp;
1308         int rc = -ENOMEM, i, acpi_idle_state = 0, pm_cap;
1309
1310         assert(ioaddr_out != NULL);
1311
1312         /* dev zeroed in alloc_etherdev */
1313         dev = alloc_etherdev(sizeof (*tp));
1314         if (dev == NULL) {
1315                 if (netif_msg_drv(&debug))
1316                         printk(KERN_ERR PFX "unable to alloc new ethernet\n");
1317                 goto err_out;
1318         }
1319
1320         SET_MODULE_OWNER(dev);
1321         SET_NETDEV_DEV(dev, &pdev->dev);
1322         tp = netdev_priv(dev);
1323         tp->msg_enable = netif_msg_init(debug.msg_enable, R8169_MSG_DEFAULT);
1324
1325         /* enable device (incl. PCI PM wakeup and hotplug setup) */
1326         rc = pci_enable_device(pdev);
1327         if (rc < 0) {
1328                 if (netif_msg_probe(tp)) {
1329                         printk(KERN_ERR PFX "%s: enable failure\n",
1330                                pci_name(pdev));
1331                 }
1332                 goto err_out_free_dev;
1333         }
1334
1335         rc = pci_set_mwi(pdev);
1336         if (rc < 0)
1337                 goto err_out_disable;
1338
1339         /* save power state before pci_enable_device overwrites it */
1340         pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);
1341         if (pm_cap) {
1342                 u16 pwr_command;
1343
1344                 pci_read_config_word(pdev, pm_cap + PCI_PM_CTRL, &pwr_command);
1345                 acpi_idle_state = pwr_command & PCI_PM_CTRL_STATE_MASK;
1346         } else {
1347                 if (netif_msg_probe(tp)) {
1348                         printk(KERN_ERR PFX
1349                                "Cannot find PowerManagement capability. "
1350                                "Aborting.\n");
1351                 }
1352                 goto err_out_mwi;
1353         }
1354
1355         /* make sure PCI base addr 1 is MMIO */
1356         if (!(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
1357                 if (netif_msg_probe(tp)) {
1358                         printk(KERN_ERR PFX
1359                                "region #1 not an MMIO resource, aborting\n");
1360                 }
1361                 rc = -ENODEV;
1362                 goto err_out_mwi;
1363         }
1364         /* check for weird/broken PCI region reporting */
1365         if (pci_resource_len(pdev, 1) < R8169_REGS_SIZE) {
1366                 if (netif_msg_probe(tp)) {
1367                         printk(KERN_ERR PFX
1368                                "Invalid PCI region size(s), aborting\n");
1369                 }
1370                 rc = -ENODEV;
1371                 goto err_out_mwi;
1372         }
1373
1374         rc = pci_request_regions(pdev, MODULENAME);
1375         if (rc < 0) {
1376                 if (netif_msg_probe(tp)) {
1377                         printk(KERN_ERR PFX "%s: could not request regions.\n",
1378                                pci_name(pdev));
1379                 }
1380                 goto err_out_mwi;
1381         }
1382
1383         tp->cp_cmd = PCIMulRW | RxChkSum;
1384
1385         if ((sizeof(dma_addr_t) > 4) &&
1386             !pci_set_dma_mask(pdev, DMA_64BIT_MASK) && use_dac) {
1387                 tp->cp_cmd |= PCIDAC;
1388                 dev->features |= NETIF_F_HIGHDMA;
1389         } else {
1390                 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1391                 if (rc < 0) {
1392                         if (netif_msg_probe(tp)) {
1393                                 printk(KERN_ERR PFX
1394                                        "DMA configuration failed.\n");
1395                         }
1396                         goto err_out_free_res;
1397                 }
1398         }
1399
1400         pci_set_master(pdev);
1401
1402         /* ioremap MMIO region */
1403         ioaddr = ioremap(pci_resource_start(pdev, 1), R8169_REGS_SIZE);
1404         if (ioaddr == NULL) {
1405                 if (netif_msg_probe(tp))
1406                         printk(KERN_ERR PFX "cannot remap MMIO, aborting\n");
1407                 rc = -EIO;
1408                 goto err_out_free_res;
1409         }
1410
1411         /* Unneeded ? Don't mess with Mrs. Murphy. */
1412         rtl8169_irq_mask_and_ack(ioaddr);
1413
1414         /* Soft reset the chip. */
1415         RTL_W8(ChipCmd, CmdReset);
1416
1417         /* Check that the chip has finished the reset. */
1418         for (i = 1000; i > 0; i--) {
1419                 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
1420                         break;
1421                 udelay(10);
1422         }
1423
1424         /* Identify chip attached to board */
1425         rtl8169_get_mac_version(tp, ioaddr);
1426         rtl8169_get_phy_version(tp, ioaddr);
1427
1428         rtl8169_print_mac_version(tp);
1429         rtl8169_print_phy_version(tp);
1430
1431         for (i = ARRAY_SIZE(rtl_chip_info) - 1; i >= 0; i--) {
1432                 if (tp->mac_version == rtl_chip_info[i].mac_version)
1433                         break;
1434         }
1435         if (i < 0) {
1436                 /* Unknown chip: assume array element #0, original RTL-8169 */
1437                 if (netif_msg_probe(tp)) {
1438                         printk(KERN_DEBUG PFX "PCI device %s: "
1439                                "unknown chip version, assuming %s\n",
1440                                pci_name(pdev), rtl_chip_info[0].name);
1441                 }
1442                 i++;
1443         }
1444         tp->chipset = i;
1445
1446         *ioaddr_out = ioaddr;
1447         *dev_out = dev;
1448 out:
1449         return rc;
1450
1451 err_out_free_res:
1452         pci_release_regions(pdev);
1453
1454 err_out_mwi:
1455         pci_clear_mwi(pdev);
1456
1457 err_out_disable:
1458         pci_disable_device(pdev);
1459
1460 err_out_free_dev:
1461         free_netdev(dev);
1462 err_out:
1463         *ioaddr_out = NULL;
1464         *dev_out = NULL;
1465         goto out;
1466 }
1467
1468 static int __devinit
1469 rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1470 {
1471         struct net_device *dev = NULL;
1472         struct rtl8169_private *tp;
1473         void __iomem *ioaddr = NULL;
1474         static int board_idx = -1;
1475         u8 autoneg, duplex;
1476         u16 speed;
1477         int i, rc;
1478
1479         assert(pdev != NULL);
1480         assert(ent != NULL);
1481
1482         board_idx++;
1483
1484         if (netif_msg_drv(&debug)) {
1485                 printk(KERN_INFO "%s Gigabit Ethernet driver %s loaded\n",
1486                        MODULENAME, RTL8169_VERSION);
1487         }
1488
1489         rc = rtl8169_init_board(pdev, &dev, &ioaddr);
1490         if (rc)
1491                 return rc;
1492
1493         tp = netdev_priv(dev);
1494         assert(ioaddr != NULL);
1495
1496         if (RTL_R8(PHYstatus) & TBI_Enable) {
1497                 tp->set_speed = rtl8169_set_speed_tbi;
1498                 tp->get_settings = rtl8169_gset_tbi;
1499                 tp->phy_reset_enable = rtl8169_tbi_reset_enable;
1500                 tp->phy_reset_pending = rtl8169_tbi_reset_pending;
1501                 tp->link_ok = rtl8169_tbi_link_ok;
1502
1503                 tp->phy_1000_ctrl_reg = PHY_Cap_1000_Full; /* Implied by TBI */
1504         } else {
1505                 tp->set_speed = rtl8169_set_speed_xmii;
1506                 tp->get_settings = rtl8169_gset_xmii;
1507                 tp->phy_reset_enable = rtl8169_xmii_reset_enable;
1508                 tp->phy_reset_pending = rtl8169_xmii_reset_pending;
1509                 tp->link_ok = rtl8169_xmii_link_ok;
1510         }
1511
1512         /* Get MAC address.  FIXME: read EEPROM */
1513         for (i = 0; i < MAC_ADDR_LEN; i++)
1514                 dev->dev_addr[i] = RTL_R8(MAC0 + i);
1515
1516         dev->open = rtl8169_open;
1517         dev->hard_start_xmit = rtl8169_start_xmit;
1518         dev->get_stats = rtl8169_get_stats;
1519         SET_ETHTOOL_OPS(dev, &rtl8169_ethtool_ops);
1520         dev->stop = rtl8169_close;
1521         dev->tx_timeout = rtl8169_tx_timeout;
1522         dev->set_multicast_list = rtl8169_set_rx_mode;
1523         dev->watchdog_timeo = RTL8169_TX_TIMEOUT;
1524         dev->irq = pdev->irq;
1525         dev->base_addr = (unsigned long) ioaddr;
1526         dev->change_mtu = rtl8169_change_mtu;
1527
1528 #ifdef CONFIG_R8169_NAPI
1529         dev->poll = rtl8169_poll;
1530         dev->weight = R8169_NAPI_WEIGHT;
1531 #endif
1532
1533 #ifdef CONFIG_R8169_VLAN
1534         dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1535         dev->vlan_rx_register = rtl8169_vlan_rx_register;
1536         dev->vlan_rx_kill_vid = rtl8169_vlan_rx_kill_vid;
1537 #endif
1538
1539 #ifdef CONFIG_NET_POLL_CONTROLLER
1540         dev->poll_controller = rtl8169_netpoll;
1541 #endif
1542
1543         tp->intr_mask = 0xffff;
1544         tp->pci_dev = pdev;
1545         tp->mmio_addr = ioaddr;
1546
1547         spin_lock_init(&tp->lock);
1548
1549         rc = register_netdev(dev);
1550         if (rc) {
1551                 rtl8169_release_board(pdev, dev, ioaddr);
1552                 return rc;
1553         }
1554
1555         if (netif_msg_probe(tp)) {
1556                 printk(KERN_DEBUG "%s: Identified chip type is '%s'.\n",
1557                        dev->name, rtl_chip_info[tp->chipset].name);
1558         }
1559
1560         pci_set_drvdata(pdev, dev);
1561
1562         if (netif_msg_probe(tp)) {
1563                 printk(KERN_INFO "%s: %s at 0x%lx, "
1564                        "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
1565                        "IRQ %d\n",
1566                        dev->name,
1567                        rtl_chip_info[ent->driver_data].name,
1568                        dev->base_addr,
1569                        dev->dev_addr[0], dev->dev_addr[1],
1570                        dev->dev_addr[2], dev->dev_addr[3],
1571                        dev->dev_addr[4], dev->dev_addr[5], dev->irq);
1572         }
1573
1574         rtl8169_hw_phy_config(dev);
1575
1576         dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
1577         RTL_W8(0x82, 0x01);
1578
1579         if (tp->mac_version < RTL_GIGA_MAC_VER_E) {
1580                 dprintk("Set PCI Latency=0x40\n");
1581                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
1582         }
1583
1584         if (tp->mac_version == RTL_GIGA_MAC_VER_D) {
1585                 dprintk("Set MAC Reg C+CR Offset 0x82h = 0x01h\n");
1586                 RTL_W8(0x82, 0x01);
1587                 dprintk("Set PHY Reg 0x0bh = 0x00h\n");
1588                 mdio_write(ioaddr, 0x0b, 0x0000); //w 0x0b 15 0 0
1589         }
1590
1591         rtl8169_link_option(board_idx, &autoneg, &speed, &duplex);
1592
1593         rtl8169_set_speed(dev, autoneg, speed, duplex);
1594
1595         if ((RTL_R8(PHYstatus) & TBI_Enable) && netif_msg_link(tp))
1596                 printk(KERN_INFO PFX "%s: TBI auto-negotiating\n", dev->name);
1597
1598         return 0;
1599 }
1600
1601 static void __devexit
1602 rtl8169_remove_one(struct pci_dev *pdev)
1603 {
1604         struct net_device *dev = pci_get_drvdata(pdev);
1605         struct rtl8169_private *tp = netdev_priv(dev);
1606
1607         assert(dev != NULL);
1608         assert(tp != NULL);
1609
1610         unregister_netdev(dev);
1611         rtl8169_release_board(pdev, dev, tp->mmio_addr);
1612         pci_set_drvdata(pdev, NULL);
1613 }
1614
1615 #ifdef CONFIG_PM
1616
1617 static int rtl8169_suspend(struct pci_dev *pdev, pm_message_t state)
1618 {
1619         struct net_device *dev = pci_get_drvdata(pdev);
1620         struct rtl8169_private *tp = netdev_priv(dev);
1621         void __iomem *ioaddr = tp->mmio_addr;
1622         unsigned long flags;
1623
1624         if (!netif_running(dev))
1625                 return 0;
1626
1627         netif_device_detach(dev);
1628         netif_stop_queue(dev);
1629         spin_lock_irqsave(&tp->lock, flags);
1630
1631         /* Disable interrupts, stop Rx and Tx */
1632         RTL_W16(IntrMask, 0);
1633         RTL_W8(ChipCmd, 0);
1634
1635         /* Update the error counts. */
1636         tp->stats.rx_missed_errors += RTL_R32(RxMissed);
1637         RTL_W32(RxMissed, 0);
1638         spin_unlock_irqrestore(&tp->lock, flags);
1639
1640         return 0;
1641 }
1642
1643 static int rtl8169_resume(struct pci_dev *pdev)
1644 {
1645         struct net_device *dev = pci_get_drvdata(pdev);
1646
1647         if (!netif_running(dev))
1648             return 0;
1649
1650         netif_device_attach(dev);
1651         rtl8169_hw_start(dev);
1652
1653         return 0;
1654 }
1655
1656 #endif /* CONFIG_PM */
1657
1658 static void rtl8169_set_rxbufsize(struct rtl8169_private *tp,
1659                                   struct net_device *dev)
1660 {
1661         unsigned int mtu = dev->mtu;
1662
1663         tp->rx_buf_sz = (mtu > RX_BUF_SIZE) ? mtu + ETH_HLEN + 8 : RX_BUF_SIZE;
1664 }
1665
1666 static int rtl8169_open(struct net_device *dev)
1667 {
1668         struct rtl8169_private *tp = netdev_priv(dev);
1669         struct pci_dev *pdev = tp->pci_dev;
1670         int retval;
1671
1672         rtl8169_set_rxbufsize(tp, dev);
1673
1674         retval =
1675             request_irq(dev->irq, rtl8169_interrupt, SA_SHIRQ, dev->name, dev);
1676         if (retval < 0)
1677                 goto out;
1678
1679         retval = -ENOMEM;
1680
1681         /*
1682          * Rx and Tx desscriptors needs 256 bytes alignment.
1683          * pci_alloc_consistent provides more.
1684          */
1685         tp->TxDescArray = pci_alloc_consistent(pdev, R8169_TX_RING_BYTES,
1686                                                &tp->TxPhyAddr);
1687         if (!tp->TxDescArray)
1688                 goto err_free_irq;
1689
1690         tp->RxDescArray = pci_alloc_consistent(pdev, R8169_RX_RING_BYTES,
1691                                                &tp->RxPhyAddr);
1692         if (!tp->RxDescArray)
1693                 goto err_free_tx;
1694
1695         retval = rtl8169_init_ring(dev);
1696         if (retval < 0)
1697                 goto err_free_rx;
1698
1699         INIT_WORK(&tp->task, NULL, dev);
1700
1701         rtl8169_hw_start(dev);
1702
1703         rtl8169_request_timer(dev);
1704
1705         rtl8169_check_link_status(dev, tp, tp->mmio_addr);
1706 out:
1707         return retval;
1708
1709 err_free_rx:
1710         pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
1711                             tp->RxPhyAddr);
1712 err_free_tx:
1713         pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
1714                             tp->TxPhyAddr);
1715 err_free_irq:
1716         free_irq(dev->irq, dev);
1717         goto out;
1718 }
1719
1720 static void rtl8169_hw_reset(void __iomem *ioaddr)
1721 {
1722         /* Disable interrupts */
1723         rtl8169_irq_mask_and_ack(ioaddr);
1724
1725         /* Reset the chipset */
1726         RTL_W8(ChipCmd, CmdReset);
1727
1728         /* PCI commit */
1729         RTL_R8(ChipCmd);
1730 }
1731
1732 static void
1733 rtl8169_hw_start(struct net_device *dev)
1734 {
1735         struct rtl8169_private *tp = netdev_priv(dev);
1736         void __iomem *ioaddr = tp->mmio_addr;
1737         u32 i;
1738
1739         /* Soft reset the chip. */
1740         RTL_W8(ChipCmd, CmdReset);
1741
1742         /* Check that the chip has finished the reset. */
1743         for (i = 1000; i > 0; i--) {
1744                 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
1745                         break;
1746                 udelay(10);
1747         }
1748
1749         RTL_W8(Cfg9346, Cfg9346_Unlock);
1750         RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
1751         RTL_W8(EarlyTxThres, EarlyTxThld);
1752
1753         /* Low hurts. Let's disable the filtering. */
1754         RTL_W16(RxMaxSize, 16383);
1755
1756         /* Set Rx Config register */
1757         i = rtl8169_rx_config |
1758                 (RTL_R32(RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1759         RTL_W32(RxConfig, i);
1760
1761         /* Set DMA burst size and Interframe Gap Time */
1762         RTL_W32(TxConfig,
1763                 (TX_DMA_BURST << TxDMAShift) | (InterFrameGap <<
1764                                                 TxInterFrameGapShift));
1765         tp->cp_cmd |= RTL_R16(CPlusCmd);
1766         RTL_W16(CPlusCmd, tp->cp_cmd);
1767
1768         if ((tp->mac_version == RTL_GIGA_MAC_VER_D) ||
1769             (tp->mac_version == RTL_GIGA_MAC_VER_E)) {
1770                 dprintk(KERN_INFO PFX "Set MAC Reg C+CR Offset 0xE0. "
1771                         "Bit-3 and bit-14 MUST be 1\n");
1772                 tp->cp_cmd |= (1 << 14) | PCIMulRW;
1773                 RTL_W16(CPlusCmd, tp->cp_cmd);
1774         }
1775
1776         /*
1777          * Undocumented corner. Supposedly:
1778          * (TxTimer << 12) | (TxPackets << 8) | (RxTimer << 4) | RxPackets
1779          */
1780         RTL_W16(IntrMitigate, 0x0000);
1781
1782         RTL_W32(TxDescStartAddrLow, ((u64) tp->TxPhyAddr & DMA_32BIT_MASK));
1783         RTL_W32(TxDescStartAddrHigh, ((u64) tp->TxPhyAddr >> 32));
1784         RTL_W32(RxDescAddrLow, ((u64) tp->RxPhyAddr & DMA_32BIT_MASK));
1785         RTL_W32(RxDescAddrHigh, ((u64) tp->RxPhyAddr >> 32));
1786         RTL_W8(Cfg9346, Cfg9346_Lock);
1787         udelay(10);
1788
1789         RTL_W32(RxMissed, 0);
1790
1791         rtl8169_set_rx_mode(dev);
1792
1793         /* no early-rx interrupts */
1794         RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
1795
1796         /* Enable all known interrupts by setting the interrupt mask. */
1797         RTL_W16(IntrMask, rtl8169_intr_mask);
1798
1799         netif_start_queue(dev);
1800 }
1801
1802 static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
1803 {
1804         struct rtl8169_private *tp = netdev_priv(dev);
1805         int ret = 0;
1806
1807         if (new_mtu < ETH_ZLEN || new_mtu > SafeMtu)
1808                 return -EINVAL;
1809
1810         dev->mtu = new_mtu;
1811
1812         if (!netif_running(dev))
1813                 goto out;
1814
1815         rtl8169_down(dev);
1816
1817         rtl8169_set_rxbufsize(tp, dev);
1818
1819         ret = rtl8169_init_ring(dev);
1820         if (ret < 0)
1821                 goto out;
1822
1823         netif_poll_enable(dev);
1824
1825         rtl8169_hw_start(dev);
1826
1827         rtl8169_request_timer(dev);
1828
1829 out:
1830         return ret;
1831 }
1832
1833 static inline void rtl8169_make_unusable_by_asic(struct RxDesc *desc)
1834 {
1835         desc->addr = 0x0badbadbadbadbadull;
1836         desc->opts1 &= ~cpu_to_le32(DescOwn | RsvdMask);
1837 }
1838
1839 static void rtl8169_free_rx_skb(struct rtl8169_private *tp,
1840                                 struct sk_buff **sk_buff, struct RxDesc *desc)
1841 {
1842         struct pci_dev *pdev = tp->pci_dev;
1843
1844         pci_unmap_single(pdev, le64_to_cpu(desc->addr), tp->rx_buf_sz,
1845                          PCI_DMA_FROMDEVICE);
1846         dev_kfree_skb(*sk_buff);
1847         *sk_buff = NULL;
1848         rtl8169_make_unusable_by_asic(desc);
1849 }
1850
1851 static inline void rtl8169_mark_to_asic(struct RxDesc *desc, u32 rx_buf_sz)
1852 {
1853         u32 eor = le32_to_cpu(desc->opts1) & RingEnd;
1854
1855         desc->opts1 = cpu_to_le32(DescOwn | eor | rx_buf_sz);
1856 }
1857
1858 static inline void rtl8169_map_to_asic(struct RxDesc *desc, dma_addr_t mapping,
1859                                        u32 rx_buf_sz)
1860 {
1861         desc->addr = cpu_to_le64(mapping);
1862         wmb();
1863         rtl8169_mark_to_asic(desc, rx_buf_sz);
1864 }
1865
1866 static int rtl8169_alloc_rx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff,
1867                                 struct RxDesc *desc, int rx_buf_sz)
1868 {
1869         struct sk_buff *skb;
1870         dma_addr_t mapping;
1871         int ret = 0;
1872
1873         skb = dev_alloc_skb(rx_buf_sz + NET_IP_ALIGN);
1874         if (!skb)
1875                 goto err_out;
1876
1877         skb_reserve(skb, NET_IP_ALIGN);
1878         *sk_buff = skb;
1879
1880         mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
1881                                  PCI_DMA_FROMDEVICE);
1882
1883         rtl8169_map_to_asic(desc, mapping, rx_buf_sz);
1884
1885 out:
1886         return ret;
1887
1888 err_out:
1889         ret = -ENOMEM;
1890         rtl8169_make_unusable_by_asic(desc);
1891         goto out;
1892 }
1893
1894 static void rtl8169_rx_clear(struct rtl8169_private *tp)
1895 {
1896         int i;
1897
1898         for (i = 0; i < NUM_RX_DESC; i++) {
1899                 if (tp->Rx_skbuff[i]) {
1900                         rtl8169_free_rx_skb(tp, tp->Rx_skbuff + i,
1901                                             tp->RxDescArray + i);
1902                 }
1903         }
1904 }
1905
1906 static u32 rtl8169_rx_fill(struct rtl8169_private *tp, struct net_device *dev,
1907                            u32 start, u32 end)
1908 {
1909         u32 cur;
1910
1911         for (cur = start; end - cur > 0; cur++) {
1912                 int ret, i = cur % NUM_RX_DESC;
1913
1914                 if (tp->Rx_skbuff[i])
1915                         continue;
1916
1917                 ret = rtl8169_alloc_rx_skb(tp->pci_dev, tp->Rx_skbuff + i,
1918                                            tp->RxDescArray + i, tp->rx_buf_sz);
1919                 if (ret < 0)
1920                         break;
1921         }
1922         return cur - start;
1923 }
1924
1925 static inline void rtl8169_mark_as_last_descriptor(struct RxDesc *desc)
1926 {
1927         desc->opts1 |= cpu_to_le32(RingEnd);
1928 }
1929
1930 static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)
1931 {
1932         tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
1933 }
1934
1935 static int rtl8169_init_ring(struct net_device *dev)
1936 {
1937         struct rtl8169_private *tp = netdev_priv(dev);
1938
1939         rtl8169_init_ring_indexes(tp);
1940
1941         memset(tp->tx_skb, 0x0, NUM_TX_DESC * sizeof(struct ring_info));
1942         memset(tp->Rx_skbuff, 0x0, NUM_RX_DESC * sizeof(struct sk_buff *));
1943
1944         if (rtl8169_rx_fill(tp, dev, 0, NUM_RX_DESC) != NUM_RX_DESC)
1945                 goto err_out;
1946
1947         rtl8169_mark_as_last_descriptor(tp->RxDescArray + NUM_RX_DESC - 1);
1948
1949         return 0;
1950
1951 err_out:
1952         rtl8169_rx_clear(tp);
1953         return -ENOMEM;
1954 }
1955
1956 static void rtl8169_unmap_tx_skb(struct pci_dev *pdev, struct ring_info *tx_skb,
1957                                  struct TxDesc *desc)
1958 {
1959         unsigned int len = tx_skb->len;
1960
1961         pci_unmap_single(pdev, le64_to_cpu(desc->addr), len, PCI_DMA_TODEVICE);
1962         desc->opts1 = 0x00;
1963         desc->opts2 = 0x00;
1964         desc->addr = 0x00;
1965         tx_skb->len = 0;
1966 }
1967
1968 static void rtl8169_tx_clear(struct rtl8169_private *tp)
1969 {
1970         unsigned int i;
1971
1972         for (i = tp->dirty_tx; i < tp->dirty_tx + NUM_TX_DESC; i++) {
1973                 unsigned int entry = i % NUM_TX_DESC;
1974                 struct ring_info *tx_skb = tp->tx_skb + entry;
1975                 unsigned int len = tx_skb->len;
1976
1977                 if (len) {
1978                         struct sk_buff *skb = tx_skb->skb;
1979
1980                         rtl8169_unmap_tx_skb(tp->pci_dev, tx_skb,
1981                                              tp->TxDescArray + entry);
1982                         if (skb) {
1983                                 dev_kfree_skb(skb);
1984                                 tx_skb->skb = NULL;
1985                         }
1986                         tp->stats.tx_dropped++;
1987                 }
1988         }
1989         tp->cur_tx = tp->dirty_tx = 0;
1990 }
1991
1992 static void rtl8169_schedule_work(struct net_device *dev, void (*task)(void *))
1993 {
1994         struct rtl8169_private *tp = netdev_priv(dev);
1995
1996         PREPARE_WORK(&tp->task, task, dev);
1997         schedule_delayed_work(&tp->task, 4);
1998 }
1999
2000 static void rtl8169_wait_for_quiescence(struct net_device *dev)
2001 {
2002         struct rtl8169_private *tp = netdev_priv(dev);
2003         void __iomem *ioaddr = tp->mmio_addr;
2004
2005         synchronize_irq(dev->irq);
2006
2007         /* Wait for any pending NAPI task to complete */
2008         netif_poll_disable(dev);
2009
2010         rtl8169_irq_mask_and_ack(ioaddr);
2011
2012         netif_poll_enable(dev);
2013 }
2014
2015 static void rtl8169_reinit_task(void *_data)
2016 {
2017         struct net_device *dev = _data;
2018         int ret;
2019
2020         if (netif_running(dev)) {
2021                 rtl8169_wait_for_quiescence(dev);
2022                 rtl8169_close(dev);
2023         }
2024
2025         ret = rtl8169_open(dev);
2026         if (unlikely(ret < 0)) {
2027                 if (net_ratelimit()) {
2028                         struct rtl8169_private *tp = netdev_priv(dev);
2029
2030                         if (netif_msg_drv(tp)) {
2031                                 printk(PFX KERN_ERR
2032                                        "%s: reinit failure (status = %d)."
2033                                        " Rescheduling.\n", dev->name, ret);
2034                         }
2035                 }
2036                 rtl8169_schedule_work(dev, rtl8169_reinit_task);
2037         }
2038 }
2039
2040 static void rtl8169_reset_task(void *_data)
2041 {
2042         struct net_device *dev = _data;
2043         struct rtl8169_private *tp = netdev_priv(dev);
2044
2045         if (!netif_running(dev))
2046                 return;
2047
2048         rtl8169_wait_for_quiescence(dev);
2049
2050         rtl8169_rx_interrupt(dev, tp, tp->mmio_addr);
2051         rtl8169_tx_clear(tp);
2052
2053         if (tp->dirty_rx == tp->cur_rx) {
2054                 rtl8169_init_ring_indexes(tp);
2055                 rtl8169_hw_start(dev);
2056                 netif_wake_queue(dev);
2057         } else {
2058                 if (net_ratelimit()) {
2059                         struct rtl8169_private *tp = netdev_priv(dev);
2060
2061                         if (netif_msg_intr(tp)) {
2062                                 printk(PFX KERN_EMERG
2063                                        "%s: Rx buffers shortage\n", dev->name);
2064                         }
2065                 }
2066                 rtl8169_schedule_work(dev, rtl8169_reset_task);
2067         }
2068 }
2069
2070 static void rtl8169_tx_timeout(struct net_device *dev)
2071 {
2072         struct rtl8169_private *tp = netdev_priv(dev);
2073
2074         rtl8169_hw_reset(tp->mmio_addr);
2075
2076         /* Let's wait a bit while any (async) irq lands on */
2077         rtl8169_schedule_work(dev, rtl8169_reset_task);
2078 }
2079
2080 static int rtl8169_xmit_frags(struct rtl8169_private *tp, struct sk_buff *skb,
2081                               u32 opts1)
2082 {
2083         struct skb_shared_info *info = skb_shinfo(skb);
2084         unsigned int cur_frag, entry;
2085         struct TxDesc *txd;
2086
2087         entry = tp->cur_tx;
2088         for (cur_frag = 0; cur_frag < info->nr_frags; cur_frag++) {
2089                 skb_frag_t *frag = info->frags + cur_frag;
2090                 dma_addr_t mapping;
2091                 u32 status, len;
2092                 void *addr;
2093
2094                 entry = (entry + 1) % NUM_TX_DESC;
2095
2096                 txd = tp->TxDescArray + entry;
2097                 len = frag->size;
2098                 addr = ((void *) page_address(frag->page)) + frag->page_offset;
2099                 mapping = pci_map_single(tp->pci_dev, addr, len, PCI_DMA_TODEVICE);
2100
2101                 /* anti gcc 2.95.3 bugware (sic) */
2102                 status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC));
2103
2104                 txd->opts1 = cpu_to_le32(status);
2105                 txd->addr = cpu_to_le64(mapping);
2106
2107                 tp->tx_skb[entry].len = len;
2108         }
2109
2110         if (cur_frag) {
2111                 tp->tx_skb[entry].skb = skb;
2112                 txd->opts1 |= cpu_to_le32(LastFrag);
2113         }
2114
2115         return cur_frag;
2116 }
2117
2118 static inline u32 rtl8169_tso_csum(struct sk_buff *skb, struct net_device *dev)
2119 {
2120         if (dev->features & NETIF_F_TSO) {
2121                 u32 mss = skb_shinfo(skb)->tso_size;
2122
2123                 if (mss)
2124                         return LargeSend | ((mss & MSSMask) << MSSShift);
2125         }
2126         if (skb->ip_summed == CHECKSUM_HW) {
2127                 const struct iphdr *ip = skb->nh.iph;
2128
2129                 if (ip->protocol == IPPROTO_TCP)
2130                         return IPCS | TCPCS;
2131                 else if (ip->protocol == IPPROTO_UDP)
2132                         return IPCS | UDPCS;
2133                 WARN_ON(1);     /* we need a WARN() */
2134         }
2135         return 0;
2136 }
2137
2138 static int rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev)
2139 {
2140         struct rtl8169_private *tp = netdev_priv(dev);
2141         unsigned int frags, entry = tp->cur_tx % NUM_TX_DESC;
2142         struct TxDesc *txd = tp->TxDescArray + entry;
2143         void __iomem *ioaddr = tp->mmio_addr;
2144         dma_addr_t mapping;
2145         u32 status, len;
2146         u32 opts1;
2147         int ret = 0;
2148
2149         if (unlikely(TX_BUFFS_AVAIL(tp) < skb_shinfo(skb)->nr_frags)) {
2150                 if (netif_msg_drv(tp)) {
2151                         printk(KERN_ERR
2152                                "%s: BUG! Tx Ring full when queue awake!\n",
2153                                dev->name);
2154                 }
2155                 goto err_stop;
2156         }
2157
2158         if (unlikely(le32_to_cpu(txd->opts1) & DescOwn))
2159                 goto err_stop;
2160
2161         opts1 = DescOwn | rtl8169_tso_csum(skb, dev);
2162
2163         frags = rtl8169_xmit_frags(tp, skb, opts1);
2164         if (frags) {
2165                 len = skb_headlen(skb);
2166                 opts1 |= FirstFrag;
2167         } else {
2168                 len = skb->len;
2169
2170                 if (unlikely(len < ETH_ZLEN)) {
2171                         skb = skb_padto(skb, ETH_ZLEN);
2172                         if (!skb)
2173                                 goto err_update_stats;
2174                         len = ETH_ZLEN;
2175                 }
2176
2177                 opts1 |= FirstFrag | LastFrag;
2178                 tp->tx_skb[entry].skb = skb;
2179         }
2180
2181         mapping = pci_map_single(tp->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
2182
2183         tp->tx_skb[entry].len = len;
2184         txd->addr = cpu_to_le64(mapping);
2185         txd->opts2 = cpu_to_le32(rtl8169_tx_vlan_tag(tp, skb));
2186
2187         wmb();
2188
2189         /* anti gcc 2.95.3 bugware (sic) */
2190         status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC));
2191         txd->opts1 = cpu_to_le32(status);
2192
2193         dev->trans_start = jiffies;
2194
2195         tp->cur_tx += frags + 1;
2196
2197         smp_wmb();
2198
2199         RTL_W8(TxPoll, 0x40);   /* set polling bit */
2200
2201         if (TX_BUFFS_AVAIL(tp) < MAX_SKB_FRAGS) {
2202                 netif_stop_queue(dev);
2203                 smp_rmb();
2204                 if (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)
2205                         netif_wake_queue(dev);
2206         }
2207
2208 out:
2209         return ret;
2210
2211 err_stop:
2212         netif_stop_queue(dev);
2213         ret = 1;
2214 err_update_stats:
2215         tp->stats.tx_dropped++;
2216         goto out;
2217 }
2218
2219 static void rtl8169_pcierr_interrupt(struct net_device *dev)
2220 {
2221         struct rtl8169_private *tp = netdev_priv(dev);
2222         struct pci_dev *pdev = tp->pci_dev;
2223         void __iomem *ioaddr = tp->mmio_addr;
2224         u16 pci_status, pci_cmd;
2225
2226         pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
2227         pci_read_config_word(pdev, PCI_STATUS, &pci_status);
2228
2229         if (netif_msg_intr(tp)) {
2230                 printk(KERN_ERR
2231                        "%s: PCI error (cmd = 0x%04x, status = 0x%04x).\n",
2232                        dev->name, pci_cmd, pci_status);
2233         }
2234
2235         /*
2236          * The recovery sequence below admits a very elaborated explanation:
2237          * - it seems to work;
2238          * - I did not see what else could be done.
2239          *
2240          * Feel free to adjust to your needs.
2241          */
2242         pci_write_config_word(pdev, PCI_COMMAND,
2243                               pci_cmd | PCI_COMMAND_SERR | PCI_COMMAND_PARITY);
2244
2245         pci_write_config_word(pdev, PCI_STATUS,
2246                 pci_status & (PCI_STATUS_DETECTED_PARITY |
2247                 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_REC_MASTER_ABORT |
2248                 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_SIG_TARGET_ABORT));
2249
2250         /* The infamous DAC f*ckup only happens at boot time */
2251         if ((tp->cp_cmd & PCIDAC) && !tp->dirty_rx && !tp->cur_rx) {
2252                 if (netif_msg_intr(tp))
2253                         printk(KERN_INFO "%s: disabling PCI DAC.\n", dev->name);
2254                 tp->cp_cmd &= ~PCIDAC;
2255                 RTL_W16(CPlusCmd, tp->cp_cmd);
2256                 dev->features &= ~NETIF_F_HIGHDMA;
2257                 rtl8169_schedule_work(dev, rtl8169_reinit_task);
2258         }
2259
2260         rtl8169_hw_reset(ioaddr);
2261 }
2262
2263 static void
2264 rtl8169_tx_interrupt(struct net_device *dev, struct rtl8169_private *tp,
2265                      void __iomem *ioaddr)
2266 {
2267         unsigned int dirty_tx, tx_left;
2268
2269         assert(dev != NULL);
2270         assert(tp != NULL);
2271         assert(ioaddr != NULL);
2272
2273         dirty_tx = tp->dirty_tx;
2274         smp_rmb();
2275         tx_left = tp->cur_tx - dirty_tx;
2276
2277         while (tx_left > 0) {
2278                 unsigned int entry = dirty_tx % NUM_TX_DESC;
2279                 struct ring_info *tx_skb = tp->tx_skb + entry;
2280                 u32 len = tx_skb->len;
2281                 u32 status;
2282
2283                 rmb();
2284                 status = le32_to_cpu(tp->TxDescArray[entry].opts1);
2285                 if (status & DescOwn)
2286                         break;
2287
2288                 tp->stats.tx_bytes += len;
2289                 tp->stats.tx_packets++;
2290
2291                 rtl8169_unmap_tx_skb(tp->pci_dev, tx_skb, tp->TxDescArray + entry);
2292
2293                 if (status & LastFrag) {
2294                         dev_kfree_skb_irq(tx_skb->skb);
2295                         tx_skb->skb = NULL;
2296                 }
2297                 dirty_tx++;
2298                 tx_left--;
2299         }
2300
2301         if (tp->dirty_tx != dirty_tx) {
2302                 tp->dirty_tx = dirty_tx;
2303                 smp_wmb();
2304                 if (netif_queue_stopped(dev) &&
2305                     (TX_BUFFS_AVAIL(tp) >= MAX_SKB_FRAGS)) {
2306                         netif_wake_queue(dev);
2307                 }
2308         }
2309 }
2310
2311 static inline int rtl8169_fragmented_frame(u32 status)
2312 {
2313         return (status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag);
2314 }
2315
2316 static inline void rtl8169_rx_csum(struct sk_buff *skb, struct RxDesc *desc)
2317 {
2318         u32 opts1 = le32_to_cpu(desc->opts1);
2319         u32 status = opts1 & RxProtoMask;
2320
2321         if (((status == RxProtoTCP) && !(opts1 & TCPFail)) ||
2322             ((status == RxProtoUDP) && !(opts1 & UDPFail)) ||
2323             ((status == RxProtoIP) && !(opts1 & IPFail)))
2324                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2325         else
2326                 skb->ip_summed = CHECKSUM_NONE;
2327 }
2328
2329 static inline int rtl8169_try_rx_copy(struct sk_buff **sk_buff, int pkt_size,
2330                                       struct RxDesc *desc, int rx_buf_sz)
2331 {
2332         int ret = -1;
2333
2334         if (pkt_size < rx_copybreak) {
2335                 struct sk_buff *skb;
2336
2337                 skb = dev_alloc_skb(pkt_size + NET_IP_ALIGN);
2338                 if (skb) {
2339                         skb_reserve(skb, NET_IP_ALIGN);
2340                         eth_copy_and_sum(skb, sk_buff[0]->data, pkt_size, 0);
2341                         *sk_buff = skb;
2342                         rtl8169_mark_to_asic(desc, rx_buf_sz);
2343                         ret = 0;
2344                 }
2345         }
2346         return ret;
2347 }
2348
2349 static int
2350 rtl8169_rx_interrupt(struct net_device *dev, struct rtl8169_private *tp,
2351                      void __iomem *ioaddr)
2352 {
2353         unsigned int cur_rx, rx_left;
2354         unsigned int delta, count;
2355
2356         assert(dev != NULL);
2357         assert(tp != NULL);
2358         assert(ioaddr != NULL);
2359
2360         cur_rx = tp->cur_rx;
2361         rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
2362         rx_left = rtl8169_rx_quota(rx_left, (u32) dev->quota);
2363
2364         for (; rx_left > 0; rx_left--, cur_rx++) {
2365                 unsigned int entry = cur_rx % NUM_RX_DESC;
2366                 struct RxDesc *desc = tp->RxDescArray + entry;
2367                 u32 status;
2368
2369                 rmb();
2370                 status = le32_to_cpu(desc->opts1);
2371
2372                 if (status & DescOwn)
2373                         break;
2374                 if (unlikely(status & RxRES)) {
2375                         if (netif_msg_rx_err(tp)) {
2376                                 printk(KERN_INFO
2377                                        "%s: Rx ERROR. status = %08x\n",
2378                                        dev->name, status);
2379                         }
2380                         tp->stats.rx_errors++;
2381                         if (status & (RxRWT | RxRUNT))
2382                                 tp->stats.rx_length_errors++;
2383                         if (status & RxCRC)
2384                                 tp->stats.rx_crc_errors++;
2385                         rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2386                 } else {
2387                         struct sk_buff *skb = tp->Rx_skbuff[entry];
2388                         int pkt_size = (status & 0x00001FFF) - 4;
2389                         void (*pci_action)(struct pci_dev *, dma_addr_t,
2390                                 size_t, int) = pci_dma_sync_single_for_device;
2391
2392                         /*
2393                          * The driver does not support incoming fragmented
2394                          * frames. They are seen as a symptom of over-mtu
2395                          * sized frames.
2396                          */
2397                         if (unlikely(rtl8169_fragmented_frame(status))) {
2398                                 tp->stats.rx_dropped++;
2399                                 tp->stats.rx_length_errors++;
2400                                 rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
2401                                 continue;
2402                         }
2403
2404                         rtl8169_rx_csum(skb, desc);
2405
2406                         pci_dma_sync_single_for_cpu(tp->pci_dev,
2407                                 le64_to_cpu(desc->addr), tp->rx_buf_sz,
2408                                 PCI_DMA_FROMDEVICE);
2409
2410                         if (rtl8169_try_rx_copy(&skb, pkt_size, desc,
2411                                                 tp->rx_buf_sz)) {
2412                                 pci_action = pci_unmap_single;
2413                                 tp->Rx_skbuff[entry] = NULL;
2414                         }
2415
2416                         pci_action(tp->pci_dev, le64_to_cpu(desc->addr),
2417                                    tp->rx_buf_sz, PCI_DMA_FROMDEVICE);
2418
2419                         skb->dev = dev;
2420                         skb_put(skb, pkt_size);
2421                         skb->protocol = eth_type_trans(skb, dev);
2422
2423                         if (rtl8169_rx_vlan_skb(tp, desc, skb) < 0)
2424                                 rtl8169_rx_skb(skb);
2425
2426                         dev->last_rx = jiffies;
2427                         tp->stats.rx_bytes += pkt_size;
2428                         tp->stats.rx_packets++;
2429                 }
2430         }
2431
2432         count = cur_rx - tp->cur_rx;
2433         tp->cur_rx = cur_rx;
2434
2435         delta = rtl8169_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);
2436         if (!delta && count && netif_msg_intr(tp))
2437                 printk(KERN_INFO "%s: no Rx buffer allocated\n", dev->name);
2438         tp->dirty_rx += delta;
2439
2440         /*
2441          * FIXME: until there is periodic timer to try and refill the ring,
2442          * a temporary shortage may definitely kill the Rx process.
2443          * - disable the asic to try and avoid an overflow and kick it again
2444          *   after refill ?
2445          * - how do others driver handle this condition (Uh oh...).
2446          */
2447         if ((tp->dirty_rx + NUM_RX_DESC == tp->cur_rx) && netif_msg_intr(tp))
2448                 printk(KERN_EMERG "%s: Rx buffers exhausted\n", dev->name);
2449
2450         return count;
2451 }
2452
2453 /* The interrupt handler does all of the Rx thread work and cleans up after the Tx thread. */
2454 static irqreturn_t
2455 rtl8169_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
2456 {
2457         struct net_device *dev = (struct net_device *) dev_instance;
2458         struct rtl8169_private *tp = netdev_priv(dev);
2459         int boguscnt = max_interrupt_work;
2460         void __iomem *ioaddr = tp->mmio_addr;
2461         int status;
2462         int handled = 0;
2463
2464         do {
2465                 status = RTL_R16(IntrStatus);
2466
2467                 /* hotplug/major error/no more work/shared irq */
2468                 if ((status == 0xFFFF) || !status)
2469                         break;
2470
2471                 handled = 1;
2472
2473                 if (unlikely(!netif_running(dev))) {
2474                         rtl8169_asic_down(ioaddr);
2475                         goto out;
2476                 }
2477
2478                 status &= tp->intr_mask;
2479                 RTL_W16(IntrStatus,
2480                         (status & RxFIFOOver) ? (status | RxOverflow) : status);
2481
2482                 if (!(status & rtl8169_intr_mask))
2483                         break;
2484
2485                 if (unlikely(status & SYSErr)) {
2486                         rtl8169_pcierr_interrupt(dev);
2487                         break;
2488                 }
2489
2490                 if (status & LinkChg)
2491                         rtl8169_check_link_status(dev, tp, ioaddr);
2492
2493 #ifdef CONFIG_R8169_NAPI
2494                 RTL_W16(IntrMask, rtl8169_intr_mask & ~rtl8169_napi_event);
2495                 tp->intr_mask = ~rtl8169_napi_event;
2496
2497                 if (likely(netif_rx_schedule_prep(dev)))
2498                         __netif_rx_schedule(dev);
2499                 else if (netif_msg_intr(tp)) {
2500                         printk(KERN_INFO "%s: interrupt %04x taken in poll\n",
2501                                dev->name, status);
2502                 }
2503                 break;
2504 #else
2505                 /* Rx interrupt */
2506                 if (status & (RxOK | RxOverflow | RxFIFOOver)) {
2507                         rtl8169_rx_interrupt(dev, tp, ioaddr);
2508                 }
2509                 /* Tx interrupt */
2510                 if (status & (TxOK | TxErr))
2511                         rtl8169_tx_interrupt(dev, tp, ioaddr);
2512 #endif
2513
2514                 boguscnt--;
2515         } while (boguscnt > 0);
2516
2517         if (boguscnt <= 0) {
2518                 if (net_ratelimit() && netif_msg_intr(tp)) {
2519                         printk(KERN_WARNING
2520                                "%s: Too much work at interrupt!\n", dev->name);
2521                 }
2522                 /* Clear all interrupt sources. */
2523                 RTL_W16(IntrStatus, 0xffff);
2524         }
2525 out:
2526         return IRQ_RETVAL(handled);
2527 }
2528
2529 #ifdef CONFIG_R8169_NAPI
2530 static int rtl8169_poll(struct net_device *dev, int *budget)
2531 {
2532         unsigned int work_done, work_to_do = min(*budget, dev->quota);
2533         struct rtl8169_private *tp = netdev_priv(dev);
2534         void __iomem *ioaddr = tp->mmio_addr;
2535
2536         work_done = rtl8169_rx_interrupt(dev, tp, ioaddr);
2537         rtl8169_tx_interrupt(dev, tp, ioaddr);
2538
2539         *budget -= work_done;
2540         dev->quota -= work_done;
2541
2542         if (work_done < work_to_do) {
2543                 netif_rx_complete(dev);
2544                 tp->intr_mask = 0xffff;
2545                 /*
2546                  * 20040426: the barrier is not strictly required but the
2547                  * behavior of the irq handler could be less predictable
2548                  * without it. Btw, the lack of flush for the posted pci
2549                  * write is safe - FR
2550                  */
2551                 smp_wmb();
2552                 RTL_W16(IntrMask, rtl8169_intr_mask);
2553         }
2554
2555         return (work_done >= work_to_do);
2556 }
2557 #endif
2558
2559 static void rtl8169_down(struct net_device *dev)
2560 {
2561         struct rtl8169_private *tp = netdev_priv(dev);
2562         void __iomem *ioaddr = tp->mmio_addr;
2563         unsigned int poll_locked = 0;
2564
2565         rtl8169_delete_timer(dev);
2566
2567         netif_stop_queue(dev);
2568
2569         flush_scheduled_work();
2570
2571 core_down:
2572         spin_lock_irq(&tp->lock);
2573
2574         rtl8169_asic_down(ioaddr);
2575
2576         /* Update the error counts. */
2577         tp->stats.rx_missed_errors += RTL_R32(RxMissed);
2578         RTL_W32(RxMissed, 0);
2579
2580         spin_unlock_irq(&tp->lock);
2581
2582         synchronize_irq(dev->irq);
2583
2584         if (!poll_locked) {
2585                 netif_poll_disable(dev);
2586                 poll_locked++;
2587         }
2588
2589         /* Give a racing hard_start_xmit a few cycles to complete. */
2590         synchronize_sched();  /* FIXME: should this be synchronize_irq()? */
2591
2592         /*
2593          * And now for the 50k$ question: are IRQ disabled or not ?
2594          *
2595          * Two paths lead here:
2596          * 1) dev->close
2597          *    -> netif_running() is available to sync the current code and the
2598          *       IRQ handler. See rtl8169_interrupt for details.
2599          * 2) dev->change_mtu
2600          *    -> rtl8169_poll can not be issued again and re-enable the
2601          *       interruptions. Let's simply issue the IRQ down sequence again.
2602          */
2603         if (RTL_R16(IntrMask))
2604                 goto core_down;
2605
2606         rtl8169_tx_clear(tp);
2607
2608         rtl8169_rx_clear(tp);
2609 }
2610
2611 static int rtl8169_close(struct net_device *dev)
2612 {
2613         struct rtl8169_private *tp = netdev_priv(dev);
2614         struct pci_dev *pdev = tp->pci_dev;
2615
2616         rtl8169_down(dev);
2617
2618         free_irq(dev->irq, dev);
2619
2620         netif_poll_enable(dev);
2621
2622         pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
2623                             tp->RxPhyAddr);
2624         pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
2625                             tp->TxPhyAddr);
2626         tp->TxDescArray = NULL;
2627         tp->RxDescArray = NULL;
2628
2629         return 0;
2630 }
2631
2632 static void
2633 rtl8169_set_rx_mode(struct net_device *dev)
2634 {
2635         struct rtl8169_private *tp = netdev_priv(dev);
2636         void __iomem *ioaddr = tp->mmio_addr;
2637         unsigned long flags;
2638         u32 mc_filter[2];       /* Multicast hash filter */
2639         int i, rx_mode;
2640         u32 tmp = 0;
2641
2642         if (dev->flags & IFF_PROMISC) {
2643                 /* Unconditionally log net taps. */
2644                 if (netif_msg_link(tp)) {
2645                         printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n",
2646                                dev->name);
2647                 }
2648                 rx_mode =
2649                     AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
2650                     AcceptAllPhys;
2651                 mc_filter[1] = mc_filter[0] = 0xffffffff;
2652         } else if ((dev->mc_count > multicast_filter_limit)
2653                    || (dev->flags & IFF_ALLMULTI)) {
2654                 /* Too many to filter perfectly -- accept all multicasts. */
2655                 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
2656                 mc_filter[1] = mc_filter[0] = 0xffffffff;
2657         } else {
2658                 struct dev_mc_list *mclist;
2659                 rx_mode = AcceptBroadcast | AcceptMyPhys;
2660                 mc_filter[1] = mc_filter[0] = 0;
2661                 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
2662                      i++, mclist = mclist->next) {
2663                         int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
2664                         mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
2665                         rx_mode |= AcceptMulticast;
2666                 }
2667         }
2668
2669         spin_lock_irqsave(&tp->lock, flags);
2670
2671         tmp = rtl8169_rx_config | rx_mode |
2672               (RTL_R32(RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
2673
2674         RTL_W32(RxConfig, tmp);
2675         RTL_W32(MAR0 + 0, mc_filter[0]);
2676         RTL_W32(MAR0 + 4, mc_filter[1]);
2677
2678         spin_unlock_irqrestore(&tp->lock, flags);
2679 }
2680
2681 /**
2682  *  rtl8169_get_stats - Get rtl8169 read/write statistics
2683  *  @dev: The Ethernet Device to get statistics for
2684  *
2685  *  Get TX/RX statistics for rtl8169
2686  */
2687 static struct net_device_stats *rtl8169_get_stats(struct net_device *dev)
2688 {
2689         struct rtl8169_private *tp = netdev_priv(dev);
2690         void __iomem *ioaddr = tp->mmio_addr;
2691         unsigned long flags;
2692
2693         if (netif_running(dev)) {
2694                 spin_lock_irqsave(&tp->lock, flags);
2695                 tp->stats.rx_missed_errors += RTL_R32(RxMissed);
2696                 RTL_W32(RxMissed, 0);
2697                 spin_unlock_irqrestore(&tp->lock, flags);
2698         }
2699
2700         return &tp->stats;
2701 }
2702
2703 static struct pci_driver rtl8169_pci_driver = {
2704         .name           = MODULENAME,
2705         .id_table       = rtl8169_pci_tbl,
2706         .probe          = rtl8169_init_one,
2707         .remove         = __devexit_p(rtl8169_remove_one),
2708 #ifdef CONFIG_PM
2709         .suspend        = rtl8169_suspend,
2710         .resume         = rtl8169_resume,
2711 #endif
2712 };
2713
2714 static int __init
2715 rtl8169_init_module(void)
2716 {
2717         return pci_module_init(&rtl8169_pci_driver);
2718 }
2719
2720 static void __exit
2721 rtl8169_cleanup_module(void)
2722 {
2723         pci_unregister_driver(&rtl8169_pci_driver);
2724 }
2725
2726 module_init(rtl8169_init_module);
2727 module_exit(rtl8169_cleanup_module);