[PATCH] turn "const static" into "static const"
[linux-2.6.git] / 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);