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