drivers/net/tc35815.c

   1 /*
   2  * tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
   3  *
   4  * Based on skelton.c by Donald Becker.
   5  *
   6  * This driver is a replacement of older and less maintained version.
   7  * This is a header of the older version:
   8  *      -----<snip>-----
   9  *      Copyright 2001 MontaVista Software Inc.
  10  *      Author: MontaVista Software, Inc.
  11  *              ahennessy@mvista.com
  12  *      Copyright (C) 2000-2001 Toshiba Corporation
  13  *      static const char *version =
  14  *              "tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
  15  *      -----<snip>-----
  16  *
  17  * This file is subject to the terms and conditions of the GNU General Public
  18  * License.  See the file "COPYING" in the main directory of this archive
  19  * for more details.
  20  *
  21  * (C) Copyright TOSHIBA CORPORATION 2004-2005
  22  * All Rights Reserved.
  23  */
  24
  25 #ifdef TC35815_NAPI
  26 #define DRV_VERSION     "1.37-NAPI"
  27 #else
  28 #define DRV_VERSION     "1.37"
  29 #endif
  30 static const char *version = "tc35815.c:v" DRV_VERSION "\n";
  31 #define MODNAME                 "tc35815"
  32
  33 #include <linux/module.h>
  34 #include <linux/kernel.h>
  35 #include <linux/types.h>
  36 #include <linux/fcntl.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/ioport.h>
  39 #include <linux/in.h>
  40 #include <linux/if_vlan.h>
  41 #include <linux/slab.h>
  42 #include <linux/string.h>
  43 #include <linux/spinlock.h>
  44 #include <linux/errno.h>
  45 #include <linux/init.h>
  46 #include <linux/netdevice.h>
  47 #include <linux/etherdevice.h>
  48 #include <linux/skbuff.h>
  49 #include <linux/delay.h>
  50 #include <linux/pci.h>
  51 #include <linux/phy.h>
  52 #include <linux/workqueue.h>
  53 #include <linux/platform_device.h>
  54 #include <asm/io.h>
  55 #include <asm/byteorder.h>
  56
  57 /* First, a few definitions that the brave might change. */
  58
  59 #define GATHER_TXINT    /* On-Demand Tx Interrupt */
  60 #define WORKAROUND_LOSTCAR
  61 #define WORKAROUND_100HALF_PROMISC
  62 /* #define TC35815_USE_PACKEDBUFFER */
  63
  64 enum tc35815_chiptype {
  65         TC35815CF = 0,
  66         TC35815_NWU,
  67         TC35815_TX4939,
  68 };
  69
  70 /* indexed by tc35815_chiptype, above */
  71 static const struct {
  72         const char *name;
  73 } chip_info[] __devinitdata = {
  74         { "TOSHIBA TC35815CF 10/100BaseTX" },
  75         { "TOSHIBA TC35815 with Wake on LAN" },
  76         { "TOSHIBA TC35815/TX4939" },
  77 };
  78
  79 static const struct pci_device_id tc35815_pci_tbl[] = {
  80         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
  81         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
  82         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
  83         {0,}
  84 };
  85 MODULE_DEVICE_TABLE(pci, tc35815_pci_tbl);
  86
  87 /* see MODULE_PARM_DESC */
  88 static struct tc35815_options {
  89         int speed;
  90         int duplex;
  91 } options;
  92
  93 /*
  94  * Registers
  95  */
  96 struct tc35815_regs {
  97         __u32 DMA_Ctl;          /* 0x00 */
  98         __u32 TxFrmPtr;
  99         __u32 TxThrsh;
 100         __u32 TxPollCtr;
 101         __u32 BLFrmPtr;
 102         __u32 RxFragSize;
 103         __u32 Int_En;
 104         __u32 FDA_Bas;
 105         __u32 FDA_Lim;          /* 0x20 */
 106         __u32 Int_Src;
 107         __u32 unused0[2];
 108         __u32 PauseCnt;
 109         __u32 RemPauCnt;
 110         __u32 TxCtlFrmStat;
 111         __u32 unused1;
 112         __u32 MAC_Ctl;          /* 0x40 */
 113         __u32 CAM_Ctl;
 114         __u32 Tx_Ctl;
 115         __u32 Tx_Stat;
 116         __u32 Rx_Ctl;
 117         __u32 Rx_Stat;
 118         __u32 MD_Data;
 119         __u32 MD_CA;
 120         __u32 CAM_Adr;          /* 0x60 */
 121         __u32 CAM_Data;
 122         __u32 CAM_Ena;
 123         __u32 PROM_Ctl;
 124         __u32 PROM_Data;
 125         __u32 Algn_Cnt;
 126         __u32 CRC_Cnt;
 127         __u32 Miss_Cnt;
 128 };
 129
 130 /*
 131  * Bit assignments
 132  */
 133 /* DMA_Ctl bit asign ------------------------------------------------------- */
 134 #define DMA_RxAlign            0x00c00000 /* 1:Reception Alignment           */
 135 #define DMA_RxAlign_1          0x00400000
 136 #define DMA_RxAlign_2          0x00800000
 137 #define DMA_RxAlign_3          0x00c00000
 138 #define DMA_M66EnStat          0x00080000 /* 1:66MHz Enable State            */
 139 #define DMA_IntMask            0x00040000 /* 1:Interupt mask                 */
 140 #define DMA_SWIntReq           0x00020000 /* 1:Software Interrupt request    */
 141 #define DMA_TxWakeUp           0x00010000 /* 1:Transmit Wake Up              */
 142 #define DMA_RxBigE             0x00008000 /* 1:Receive Big Endian            */
 143 #define DMA_TxBigE             0x00004000 /* 1:Transmit Big Endian           */
 144 #define DMA_TestMode           0x00002000 /* 1:Test Mode                     */
 145 #define DMA_PowrMgmnt          0x00001000 /* 1:Power Management              */
 146 #define DMA_DmBurst_Mask       0x000001fc /* DMA Burst size                  */
 147
 148 /* RxFragSize bit asign ---------------------------------------------------- */
 149 #define RxFrag_EnPack          0x00008000 /* 1:Enable Packing                */
 150 #define RxFrag_MinFragMask     0x00000ffc /* Minimum Fragment                */
 151
 152 /* MAC_Ctl bit asign ------------------------------------------------------- */
 153 #define MAC_Link10             0x00008000 /* 1:Link Status 10Mbits           */
 154 #define MAC_EnMissRoll         0x00002000 /* 1:Enable Missed Roll            */
 155 #define MAC_MissRoll           0x00000400 /* 1:Missed Roll                   */
 156 #define MAC_Loop10             0x00000080 /* 1:Loop 10 Mbps                  */
 157 #define MAC_Conn_Auto          0x00000000 /*00:Connection mode (Automatic)   */
 158 #define MAC_Conn_10M           0x00000020 /*01:                (10Mbps endec)*/
 159 #define MAC_Conn_Mll           0x00000040 /*10:                (Mll clock)   */
 160 #define MAC_MacLoop            0x00000010 /* 1:MAC Loopback                  */
 161 #define MAC_FullDup            0x00000008 /* 1:Full Duplex 0:Half Duplex     */
 162 #define MAC_Reset              0x00000004 /* 1:Software Reset                */
 163 #define MAC_HaltImm            0x00000002 /* 1:Halt Immediate                */
 164 #define MAC_HaltReq            0x00000001 /* 1:Halt request                  */
 165
 166 /* PROM_Ctl bit asign ------------------------------------------------------ */
 167 #define PROM_Busy              0x00008000 /* 1:Busy (Start Operation)        */
 168 #define PROM_Read              0x00004000 /*10:Read operation                */
 169 #define PROM_Write             0x00002000 /*01:Write operation               */
 170 #define PROM_Erase             0x00006000 /*11:Erase operation               */
 171                                           /*00:Enable or Disable Writting,   */
 172                                           /*      as specified in PROM_Addr. */
 173 #define PROM_Addr_Ena          0x00000030 /*11xxxx:PROM Write enable         */
 174                                           /*00xxxx:           disable        */
 175
 176 /* CAM_Ctl bit asign ------------------------------------------------------- */
 177 #define CAM_CompEn             0x00000010 /* 1:CAM Compare Enable            */
 178 #define CAM_NegCAM             0x00000008 /* 1:Reject packets CAM recognizes,*/
 179                                           /*                    accept other */
 180 #define CAM_BroadAcc           0x00000004 /* 1:Broadcast assept              */
 181 #define CAM_GroupAcc           0x00000002 /* 1:Multicast assept              */
 182 #define CAM_StationAcc         0x00000001 /* 1:unicast accept                */
 183
 184 /* CAM_Ena bit asign ------------------------------------------------------- */
 185 #define CAM_ENTRY_MAX                  21   /* CAM Data entry max count      */
 186 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits)  */
 187 #define CAM_Ena_Bit(index)      (1 << (index))
 188 #define CAM_ENTRY_DESTINATION   0
 189 #define CAM_ENTRY_SOURCE        1
 190 #define CAM_ENTRY_MACCTL        20
 191
 192 /* Tx_Ctl bit asign -------------------------------------------------------- */
 193 #define Tx_En                  0x00000001 /* 1:Transmit enable               */
 194 #define Tx_TxHalt              0x00000002 /* 1:Transmit Halt Request         */
 195 #define Tx_NoPad               0x00000004 /* 1:Suppress Padding              */
 196 #define Tx_NoCRC               0x00000008 /* 1:Suppress Padding              */
 197 #define Tx_FBack               0x00000010 /* 1:Fast Back-off                 */
 198 #define Tx_EnUnder             0x00000100 /* 1:Enable Underrun               */
 199 #define Tx_EnExDefer           0x00000200 /* 1:Enable Excessive Deferral     */
 200 #define Tx_EnLCarr             0x00000400 /* 1:Enable Lost Carrier           */
 201 #define Tx_EnExColl            0x00000800 /* 1:Enable Excessive Collision    */
 202 #define Tx_EnLateColl          0x00001000 /* 1:Enable Late Collision         */
 203 #define Tx_EnTxPar             0x00002000 /* 1:Enable Transmit Parity        */
 204 #define Tx_EnComp              0x00004000 /* 1:Enable Completion             */
 205
 206 /* Tx_Stat bit asign ------------------------------------------------------- */
 207 #define Tx_TxColl_MASK         0x0000000F /* Tx Collision Count              */
 208 #define Tx_ExColl              0x00000010 /* Excessive Collision             */
 209 #define Tx_TXDefer             0x00000020 /* Transmit Defered                */
 210 #define Tx_Paused              0x00000040 /* Transmit Paused                 */
 211 #define Tx_IntTx               0x00000080 /* Interrupt on Tx                 */
 212 #define Tx_Under               0x00000100 /* Underrun                        */
 213 #define Tx_Defer               0x00000200 /* Deferral                        */
 214 #define Tx_NCarr               0x00000400 /* No Carrier                      */
 215 #define Tx_10Stat              0x00000800 /* 10Mbps Status                   */
 216 #define Tx_LateColl            0x00001000 /* Late Collision                  */
 217 #define Tx_TxPar               0x00002000 /* Tx Parity Error                 */
 218 #define Tx_Comp                0x00004000 /* Completion                      */
 219 #define Tx_Halted              0x00008000 /* Tx Halted                       */
 220 #define Tx_SQErr               0x00010000 /* Signal Quality Error(SQE)       */
 221
 222 /* Rx_Ctl bit asign -------------------------------------------------------- */
 223 #define Rx_EnGood              0x00004000 /* 1:Enable Good                   */
 224 #define Rx_EnRxPar             0x00002000 /* 1:Enable Receive Parity         */
 225 #define Rx_EnLongErr           0x00000800 /* 1:Enable Long Error             */
 226 #define Rx_EnOver              0x00000400 /* 1:Enable OverFlow               */
 227 #define Rx_EnCRCErr            0x00000200 /* 1:Enable CRC Error              */
 228 #define Rx_EnAlign             0x00000100 /* 1:Enable Alignment              */
 229 #define Rx_IgnoreCRC           0x00000040 /* 1:Ignore CRC Value              */
 230 #define Rx_StripCRC            0x00000010 /* 1:Strip CRC Value               */
 231 #define Rx_ShortEn             0x00000008 /* 1:Short Enable                  */
 232 #define Rx_LongEn              0x00000004 /* 1:Long Enable                   */
 233 #define Rx_RxHalt              0x00000002 /* 1:Receive Halt Request          */
 234 #define Rx_RxEn                0x00000001 /* 1:Receive Intrrupt Enable       */
 235
 236 /* Rx_Stat bit asign ------------------------------------------------------- */
 237 #define Rx_Halted              0x00008000 /* Rx Halted                       */
 238 #define Rx_Good                0x00004000 /* Rx Good                         */
 239 #define Rx_RxPar               0x00002000 /* Rx Parity Error                 */
 240 #define Rx_TypePkt             0x00001000 /* Rx Type Packet                  */
 241 #define Rx_LongErr             0x00000800 /* Rx Long Error                   */
 242 #define Rx_Over                0x00000400 /* Rx Overflow                     */
 243 #define Rx_CRCErr              0x00000200 /* Rx CRC Error                    */
 244 #define Rx_Align               0x00000100 /* Rx Alignment Error              */
 245 #define Rx_10Stat              0x00000080 /* Rx 10Mbps Status                */
 246 #define Rx_IntRx               0x00000040 /* Rx Interrupt                    */
 247 #define Rx_CtlRecd             0x00000020 /* Rx Control Receive              */
 248 #define Rx_InLenErr            0x00000010 /* Rx In Range Frame Length Error  */
 249
 250 #define Rx_Stat_Mask           0x0000FFF0 /* Rx All Status Mask              */
 251
 252 /* Int_En bit asign -------------------------------------------------------- */
 253 #define Int_NRAbtEn            0x00000800 /* 1:Non-recoverable Abort Enable  */
 254 #define Int_TxCtlCmpEn         0x00000400 /* 1:Transmit Ctl Complete Enable  */
 255 #define Int_DmParErrEn         0x00000200 /* 1:DMA Parity Error Enable       */
 256 #define Int_DParDEn            0x00000100 /* 1:Data Parity Error Enable      */
 257 #define Int_EarNotEn           0x00000080 /* 1:Early Notify Enable           */
 258 #define Int_DParErrEn          0x00000040 /* 1:Detected Parity Error Enable  */
 259 #define Int_SSysErrEn          0x00000020 /* 1:Signalled System Error Enable */
 260 #define Int_RMasAbtEn          0x00000010 /* 1:Received Master Abort Enable  */
 261 #define Int_RTargAbtEn         0x00000008 /* 1:Received Target Abort Enable  */
 262 #define Int_STargAbtEn         0x00000004 /* 1:Signalled Target Abort Enable */
 263 #define Int_BLExEn             0x00000002 /* 1:Buffer List Exhausted Enable  */
 264 #define Int_FDAExEn            0x00000001 /* 1:Free Descriptor Area          */
 265                                           /*               Exhausted Enable  */
 266
 267 /* Int_Src bit asign ------------------------------------------------------- */
 268 #define Int_NRabt              0x00004000 /* 1:Non Recoverable error         */
 269 #define Int_DmParErrStat       0x00002000 /* 1:DMA Parity Error & Clear      */
 270 #define Int_BLEx               0x00001000 /* 1:Buffer List Empty & Clear     */
 271 #define Int_FDAEx              0x00000800 /* 1:FDA Empty & Clear             */
 272 #define Int_IntNRAbt           0x00000400 /* 1:Non Recoverable Abort         */
 273 #define Int_IntCmp             0x00000200 /* 1:MAC control packet complete   */
 274 #define Int_IntExBD            0x00000100 /* 1:Interrupt Extra BD & Clear    */
 275 #define Int_DmParErr           0x00000080 /* 1:DMA Parity Error & Clear      */
 276 #define Int_IntEarNot          0x00000040 /* 1:Receive Data write & Clear    */
 277 #define Int_SWInt              0x00000020 /* 1:Software request & Clear      */
 278 #define Int_IntBLEx            0x00000010 /* 1:Buffer List Empty & Clear     */
 279 #define Int_IntFDAEx           0x00000008 /* 1:FDA Empty & Clear             */
 280 #define Int_IntPCI             0x00000004 /* 1:PCI controller & Clear        */
 281 #define Int_IntMacRx           0x00000002 /* 1:Rx controller & Clear         */
 282 #define Int_IntMacTx           0x00000001 /* 1:Tx controller & Clear         */
 283
 284 /* MD_CA bit asign --------------------------------------------------------- */
 285 #define MD_CA_PreSup           0x00001000 /* 1:Preamble Supress              */
 286 #define MD_CA_Busy             0x00000800 /* 1:Busy (Start Operation)        */
 287 #define MD_CA_Wr               0x00000400 /* 1:Write 0:Read                  */
 288
 289
 290 /*
 291  * Descriptors
 292  */
 293
 294 /* Frame descripter */
 295 struct FDesc {
 296         volatile __u32 FDNext;
 297         volatile __u32 FDSystem;
 298         volatile __u32 FDStat;
 299         volatile __u32 FDCtl;
 300 };
 301
 302 /* Buffer descripter */
 303 struct BDesc {
 304         volatile __u32 BuffData;
 305         volatile __u32 BDCtl;
 306 };
 307
 308 #define FD_ALIGN        16
 309
 310 /* Frame Descripter bit asign ---------------------------------------------- */
 311 #define FD_FDLength_MASK       0x0000FFFF /* Length MASK                     */
 312 #define FD_BDCnt_MASK          0x001F0000 /* BD count MASK in FD             */
 313 #define FD_FrmOpt_MASK         0x7C000000 /* Frame option MASK               */
 314 #define FD_FrmOpt_BigEndian    0x40000000 /* Tx/Rx */
 315 #define FD_FrmOpt_IntTx        0x20000000 /* Tx only */
 316 #define FD_FrmOpt_NoCRC        0x10000000 /* Tx only */
 317 #define FD_FrmOpt_NoPadding    0x08000000 /* Tx only */
 318 #define FD_FrmOpt_Packing      0x04000000 /* Rx only */
 319 #define FD_CownsFD             0x80000000 /* FD Controller owner bit         */
 320 #define FD_Next_EOL            0x00000001 /* FD EOL indicator                */
 321 #define FD_BDCnt_SHIFT         16
 322
 323 /* Buffer Descripter bit asign --------------------------------------------- */
 324 #define BD_BuffLength_MASK     0x0000FFFF /* Recieve Data Size               */
 325 #define BD_RxBDID_MASK         0x00FF0000 /* BD ID Number MASK               */
 326 #define BD_RxBDSeqN_MASK       0x7F000000 /* Rx BD Sequence Number           */
 327 #define BD_CownsBD             0x80000000 /* BD Controller owner bit         */
 328 #define BD_RxBDID_SHIFT        16
 329 #define BD_RxBDSeqN_SHIFT      24
 330
 331
 332 /* Some useful constants. */
 333 #undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
 334
 335 #ifdef NO_CHECK_CARRIER
 336 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 337         Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
 338         Tx_En)  /* maybe  0x7b01 */
 339 #else
 340 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 341         Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
 342         Tx_En)  /* maybe  0x7b01 */
 343 #endif
 344 #define RX_CTL_CMD      (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
 345         | Rx_EnCRCErr | Rx_EnAlign | Rx_StripCRC | Rx_RxEn) /* maybe 0x6f11 */
 346 #define INT_EN_CMD  (Int_NRAbtEn | \
 347         Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
 348         Int_SSysErrEn  | Int_RMasAbtEn | Int_RTargAbtEn | \
 349         Int_STargAbtEn | \
 350         Int_BLExEn  | Int_FDAExEn) /* maybe 0xb7f*/
 351 #define DMA_CTL_CMD     DMA_BURST_SIZE
 352 #define HAVE_DMA_RXALIGN(lp)    likely((lp)->chiptype != TC35815CF)
 353
 354 /* Tuning parameters */
 355 #define DMA_BURST_SIZE  32
 356 #define TX_THRESHOLD    1024
 357 /* used threshold with packet max byte for low pci transfer ability.*/
 358 #define TX_THRESHOLD_MAX 1536
 359 /* setting threshold max value when overrun error occured this count. */
 360 #define TX_THRESHOLD_KEEP_LIMIT 10
 361
 362 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
 363 #ifdef TC35815_USE_PACKEDBUFFER
 364 #define FD_PAGE_NUM 2
 365 #define RX_BUF_NUM      8       /* >= 2 */
 366 #define RX_FD_NUM       250     /* >= 32 */
 367 #define TX_FD_NUM       128
 368 #define RX_BUF_SIZE     PAGE_SIZE
 369 #else /* TC35815_USE_PACKEDBUFFER */
 370 #define FD_PAGE_NUM 4
 371 #define RX_BUF_NUM      128     /* < 256 */
 372 #define RX_FD_NUM       256     /* >= 32 */
 373 #define TX_FD_NUM       128
 374 #if RX_CTL_CMD & Rx_LongEn
 375 #define RX_BUF_SIZE     PAGE_SIZE
 376 #elif RX_CTL_CMD & Rx_StripCRC
 377 #define RX_BUF_SIZE     \
 378         L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + NET_IP_ALIGN)
 379 #else
 380 #define RX_BUF_SIZE     \
 381         L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN + NET_IP_ALIGN)
 382 #endif
 383 #endif /* TC35815_USE_PACKEDBUFFER */
 384 #define RX_FD_RESERVE   (2 / 2) /* max 2 BD per RxFD */
 385 #define NAPI_WEIGHT     16
 386
 387 struct TxFD {
 388         struct FDesc fd;
 389         struct BDesc bd;
 390         struct BDesc unused;
 391 };
 392
 393 struct RxFD {
 394         struct FDesc fd;
 395         struct BDesc bd[0];     /* variable length */
 396 };
 397
 398 struct FrFD {
 399         struct FDesc fd;
 400         struct BDesc bd[RX_BUF_NUM];
 401 };
 402
 403
 404 #define tc_readl(addr)  ioread32(addr)
 405 #define tc_writel(d, addr)      iowrite32(d, addr)
 406
 407 #define TC35815_TX_TIMEOUT  msecs_to_jiffies(400)
 408
 409 /* Information that need to be kept for each controller. */
 410 struct tc35815_local {
 411         struct pci_dev *pci_dev;
 412
 413         struct net_device *dev;
 414         struct napi_struct napi;
 415
 416         /* statistics */
 417         struct {
 418                 int max_tx_qlen;
 419                 int tx_ints;
 420                 int rx_ints;
 421                 int tx_underrun;
 422         } lstats;
 423
 424         /* Tx control lock.  This protects the transmit buffer ring
 425          * state along with the "tx full" state of the driver.  This
 426          * means all netif_queue flow control actions are protected
 427          * by this lock as well.
 428          */
 429         spinlock_t lock;
 430
 431         struct mii_bus *mii_bus;
 432         struct phy_device *phy_dev;
 433         int duplex;
 434         int speed;
 435         int link;
 436         struct work_struct restart_work;
 437
 438         /*
 439          * Transmitting: Batch Mode.
 440          *      1 BD in 1 TxFD.
 441          * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
 442          *      1 circular FD for Free Buffer List.
 443          *      RX_BUF_NUM BD in Free Buffer FD.
 444          *      One Free Buffer BD has PAGE_SIZE data buffer.
 445          * Or Non-Packing Mode.
 446          *      1 circular FD for Free Buffer List.
 447          *      RX_BUF_NUM BD in Free Buffer FD.
 448          *      One Free Buffer BD has ETH_FRAME_LEN data buffer.
 449          */
 450         void *fd_buf;   /* for TxFD, RxFD, FrFD */
 451         dma_addr_t fd_buf_dma;
 452         struct TxFD *tfd_base;
 453         unsigned int tfd_start;
 454         unsigned int tfd_end;
 455         struct RxFD *rfd_base;
 456         struct RxFD *rfd_limit;
 457         struct RxFD *rfd_cur;
 458         struct FrFD *fbl_ptr;
 459 #ifdef TC35815_USE_PACKEDBUFFER
 460         unsigned char fbl_curid;
 461         void *data_buf[RX_BUF_NUM];             /* packing */
 462         dma_addr_t data_buf_dma[RX_BUF_NUM];
 463         struct {
 464                 struct sk_buff *skb;
 465                 dma_addr_t skb_dma;
 466         } tx_skbs[TX_FD_NUM];
 467 #else
 468         unsigned int fbl_count;
 469         struct {
 470                 struct sk_buff *skb;
 471                 dma_addr_t skb_dma;
 472         } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
 473 #endif
 474         u32 msg_enable;
 475         enum tc35815_chiptype chiptype;
 476 };
 477
 478 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
 479 {
 480         return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
 481 }
 482 #ifdef DEBUG
 483 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 484 {
 485         return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
 486 }
 487 #endif
 488 #ifdef TC35815_USE_PACKEDBUFFER
 489 static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 490 {
 491         int i;
 492         for (i = 0; i < RX_BUF_NUM; i++) {
 493                 if (bus >= lp->data_buf_dma[i] &&
 494                     bus < lp->data_buf_dma[i] + PAGE_SIZE)
 495                         return (void *)((u8 *)lp->data_buf[i] +
 496                                         (bus - lp->data_buf_dma[i]));
 497         }
 498         return NULL;
 499 }
 500
 501 #define TC35815_DMA_SYNC_ONDEMAND
 502 static void *alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
 503 {
 504 #ifdef TC35815_DMA_SYNC_ONDEMAND
 505         void *buf;
 506         /* pci_map + pci_dma_sync will be more effective than
 507          * pci_alloc_consistent on some archs. */
 508         buf = (void *)__get_free_page(GFP_ATOMIC);
 509         if (!buf)
 510                 return NULL;
 511         *dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
 512                                      PCI_DMA_FROMDEVICE);
 513         if (pci_dma_mapping_error(hwdev, *dma_handle)) {
 514                 free_page((unsigned long)buf);
 515                 return NULL;
 516         }
 517         return buf;
 518 #else
 519         return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
 520 #endif
 521 }
 522
 523 static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
 524 {
 525 #ifdef TC35815_DMA_SYNC_ONDEMAND
 526         pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 527         free_page((unsigned long)buf);
 528 #else
 529         pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
 530 #endif
 531 }
 532 #else /* TC35815_USE_PACKEDBUFFER */
 533 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
 534                                        struct pci_dev *hwdev,
 535                                        dma_addr_t *dma_handle)
 536 {
 537         struct sk_buff *skb;
 538         skb = dev_alloc_skb(RX_BUF_SIZE);
 539         if (!skb)
 540                 return NULL;
 541         *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
 542                                      PCI_DMA_FROMDEVICE);
 543         if (pci_dma_mapping_error(hwdev, *dma_handle)) {
 544                 dev_kfree_skb_any(skb);
 545                 return NULL;
 546         }
 547         skb_reserve(skb, 2);    /* make IP header 4byte aligned */
 548         return skb;
 549 }
 550
 551 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
 552 {
 553         pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
 554                          PCI_DMA_FROMDEVICE);
 555         dev_kfree_skb_any(skb);
 556 }
 557 #endif /* TC35815_USE_PACKEDBUFFER */
 558
 559 /* Index to functions, as function prototypes. */
 560
 561 static int      tc35815_open(struct net_device *dev);
 562 static int      tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
 563 static irqreturn_t      tc35815_interrupt(int irq, void *dev_id);
 564 #ifdef TC35815_NAPI
 565 static int      tc35815_rx(struct net_device *dev, int limit);
 566 static int      tc35815_poll(struct napi_struct *napi, int budget);
 567 #else
 568 static void     tc35815_rx(struct net_device *dev);
 569 #endif
 570 static void     tc35815_txdone(struct net_device *dev);
 571 static int      tc35815_close(struct net_device *dev);
 572 static struct   net_device_stats *tc35815_get_stats(struct net_device *dev);
 573 static void     tc35815_set_multicast_list(struct net_device *dev);
 574 static void     tc35815_tx_timeout(struct net_device *dev);
 575 static int      tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 576 #ifdef CONFIG_NET_POLL_CONTROLLER
 577 static void     tc35815_poll_controller(struct net_device *dev);
 578 #endif
 579 static const struct ethtool_ops tc35815_ethtool_ops;
 580
 581 /* Example routines you must write ;->. */
 582 static void     tc35815_chip_reset(struct net_device *dev);
 583 static void     tc35815_chip_init(struct net_device *dev);
 584
 585 #ifdef DEBUG
 586 static void     panic_queues(struct net_device *dev);
 587 #endif
 588
 589 static void tc35815_restart_work(struct work_struct *work);
 590
 591 static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
 592 {
 593         struct net_device *dev = bus->priv;
 594         struct tc35815_regs __iomem *tr =
 595                 (struct tc35815_regs __iomem *)dev->base_addr;
 596         unsigned long timeout = jiffies + 10;
 597
 598         tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA);
 599         while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
 600                 if (time_after(jiffies, timeout))
 601                         return -EIO;
 602                 cpu_relax();
 603         }
 604         return tc_readl(&tr->MD_Data) & 0xffff;
 605 }
 606
 607 static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val)
 608 {
 609         struct net_device *dev = bus->priv;
 610         struct tc35815_regs __iomem *tr =
 611                 (struct tc35815_regs __iomem *)dev->base_addr;
 612         unsigned long timeout = jiffies + 10;
 613
 614         tc_writel(val, &tr->MD_Data);
 615         tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f),
 616                   &tr->MD_CA);
 617         while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
 618                 if (time_after(jiffies, timeout))
 619                         return -EIO;
 620                 cpu_relax();
 621         }
 622         return 0;
 623 }
 624
 625 static void tc_handle_link_change(struct net_device *dev)
 626 {
 627         struct tc35815_local *lp = netdev_priv(dev);
 628         struct phy_device *phydev = lp->phy_dev;
 629         unsigned long flags;
 630         int status_change = 0;
 631
 632         spin_lock_irqsave(&lp->lock, flags);
 633         if (phydev->link &&
 634             (lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
 635                 struct tc35815_regs __iomem *tr =
 636                         (struct tc35815_regs __iomem *)dev->base_addr;
 637                 u32 reg;
 638
 639                 reg = tc_readl(&tr->MAC_Ctl);
 640                 reg |= MAC_HaltReq;
 641                 tc_writel(reg, &tr->MAC_Ctl);
 642                 if (phydev->duplex == DUPLEX_FULL)
 643                         reg |= MAC_FullDup;
 644                 else
 645                         reg &= ~MAC_FullDup;
 646                 tc_writel(reg, &tr->MAC_Ctl);
 647                 reg &= ~MAC_HaltReq;
 648                 tc_writel(reg, &tr->MAC_Ctl);
 649
 650                 /*
 651                  * TX4939 PCFG.SPEEDn bit will be changed on
 652                  * NETDEV_CHANGE event.
 653                  */
 654
 655 #if !defined(NO_CHECK_CARRIER) && defined(WORKAROUND_LOSTCAR)
 656                 /*
 657                  * WORKAROUND: enable LostCrS only if half duplex
 658                  * operation.
 659                  * (TX4939 does not have EnLCarr)
 660                  */
 661                 if (phydev->duplex == DUPLEX_HALF &&
 662                     lp->chiptype != TC35815_TX4939)
 663                         tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
 664                                   &tr->Tx_Ctl);
 665 #endif
 666
 667                 lp->speed = phydev->speed;
 668                 lp->duplex = phydev->duplex;
 669                 status_change = 1;
 670         }
 671
 672         if (phydev->link != lp->link) {
 673                 if (phydev->link) {
 674 #ifdef WORKAROUND_100HALF_PROMISC
 675                         /* delayed promiscuous enabling */
 676                         if (dev->flags & IFF_PROMISC)
 677                                 tc35815_set_multicast_list(dev);
 678 #endif
 679                 } else {
 680                         lp->speed = 0;
 681                         lp->duplex = -1;
 682                 }
 683                 lp->link = phydev->link;
 684
 685                 status_change = 1;
 686         }
 687         spin_unlock_irqrestore(&lp->lock, flags);
 688
 689         if (status_change && netif_msg_link(lp)) {
 690                 phy_print_status(phydev);
 691 #ifdef DEBUG
 692                 printk(KERN_DEBUG
 693                        "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
 694                        dev->name,
 695                        phy_read(phydev, MII_BMCR),
 696                        phy_read(phydev, MII_BMSR),
 697                        phy_read(phydev, MII_LPA));
 698 #endif
 699         }
 700 }
 701
 702 static int tc_mii_probe(struct net_device *dev)
 703 {
 704         struct tc35815_local *lp = netdev_priv(dev);
 705         struct phy_device *phydev = NULL;
 706         int phy_addr;
 707         u32 dropmask;
 708
 709         /* find the first phy */
 710         for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
 711                 if (lp->mii_bus->phy_map[phy_addr]) {
 712                         if (phydev) {
 713                                 printk(KERN_ERR "%s: multiple PHYs found\n",
 714                                        dev->name);
 715                                 return -EINVAL;
 716                         }
 717                         phydev = lp->mii_bus->phy_map[phy_addr];
 718                         break;
 719                 }
 720         }
 721
 722         if (!phydev) {
 723                 printk(KERN_ERR "%s: no PHY found\n", dev->name);
 724                 return -ENODEV;
 725         }
 726
 727         /* attach the mac to the phy */
 728         phydev = phy_connect(dev, dev_name(&phydev->dev),
 729                              &tc_handle_link_change, 0,
 730                              lp->chiptype == TC35815_TX4939 ?
 731                              PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII);
 732         if (IS_ERR(phydev)) {
 733                 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
 734                 return PTR_ERR(phydev);
 735         }
 736         printk(KERN_INFO "%s: attached PHY driver [%s] "
 737                 "(mii_bus:phy_addr=%s, id=%x)\n",
 738                 dev->name, phydev->drv->name, dev_name(&phydev->dev),
 739                 phydev->phy_id);
 740
 741         /* mask with MAC supported features */
 742         phydev->supported &= PHY_BASIC_FEATURES;
 743         dropmask = 0;
 744         if (options.speed == 10)
 745                 dropmask |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
 746         else if (options.speed == 100)
 747                 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
 748         if (options.duplex == 1)
 749                 dropmask |= SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full;
 750         else if (options.duplex == 2)
 751                 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_100baseT_Half;
 752         phydev->supported &= ~dropmask;
 753         phydev->advertising = phydev->supported;
 754
 755         lp->link = 0;
 756         lp->speed = 0;
 757         lp->duplex = -1;
 758         lp->phy_dev = phydev;
 759
 760         return 0;
 761 }
 762
 763 static int tc_mii_init(struct net_device *dev)
 764 {
 765         struct tc35815_local *lp = netdev_priv(dev);
 766         int err;
 767         int i;
 768
 769         lp->mii_bus = mdiobus_alloc();
 770         if (lp->mii_bus == NULL) {
 771                 err = -ENOMEM;
 772                 goto err_out;
 773         }
 774
 775         lp->mii_bus->name = "tc35815_mii_bus";
 776         lp->mii_bus->read = tc_mdio_read;
 777         lp->mii_bus->write = tc_mdio_write;
 778         snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x",
 779                  (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
 780         lp->mii_bus->priv = dev;
 781         lp->mii_bus->parent = &lp->pci_dev->dev;
 782         lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
 783         if (!lp->mii_bus->irq) {
 784                 err = -ENOMEM;
 785                 goto err_out_free_mii_bus;
 786         }
 787
 788         for (i = 0; i < PHY_MAX_ADDR; i++)
 789                 lp->mii_bus->irq[i] = PHY_POLL;
 790
 791         err = mdiobus_register(lp->mii_bus);
 792         if (err)
 793                 goto err_out_free_mdio_irq;
 794         err = tc_mii_probe(dev);
 795         if (err)
 796                 goto err_out_unregister_bus;
 797         return 0;
 798
 799 err_out_unregister_bus:
 800         mdiobus_unregister(lp->mii_bus);
 801 err_out_free_mdio_irq:
 802         kfree(lp->mii_bus->irq);
 803 err_out_free_mii_bus:
 804         mdiobus_free(lp->mii_bus);
 805 err_out:
 806         return err;
 807 }
 808
 809 #ifdef CONFIG_CPU_TX49XX
 810 /*
 811  * Find a platform_device providing a MAC address.  The platform code
 812  * should provide a "tc35815-mac" device with a MAC address in its
 813  * platform_data.
 814  */
 815 static int __devinit tc35815_mac_match(struct device *dev, void *data)
 816 {
 817         struct platform_device *plat_dev = to_platform_device(dev);
 818         struct pci_dev *pci_dev = data;
 819         unsigned int id = pci_dev->irq;
 820         return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
 821 }
 822
 823 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 824 {
 825         struct tc35815_local *lp = netdev_priv(dev);
 826         struct device *pd = bus_find_device(&platform_bus_type, NULL,
 827                                             lp->pci_dev, tc35815_mac_match);
 828         if (pd) {
 829                 if (pd->platform_data)
 830                         memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
 831                 put_device(pd);
 832                 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
 833         }
 834         return -ENODEV;
 835 }
 836 #else
 837 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 838 {
 839         return -ENODEV;
 840 }
 841 #endif
 842
 843 static int __devinit tc35815_init_dev_addr(struct net_device *dev)
 844 {
 845         struct tc35815_regs __iomem *tr =
 846                 (struct tc35815_regs __iomem *)dev->base_addr;
 847         int i;
 848
 849         while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 850                 ;
 851         for (i = 0; i < 6; i += 2) {
 852                 unsigned short data;
 853                 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
 854                 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 855                         ;
 856                 data = tc_readl(&tr->PROM_Data);
 857                 dev->dev_addr[i] = data & 0xff;
 858                 dev->dev_addr[i+1] = data >> 8;
 859         }
 860         if (!is_valid_ether_addr(dev->dev_addr))
 861                 return tc35815_read_plat_dev_addr(dev);
 862         return 0;
 863 }
 864
 865 static const struct net_device_ops tc35815_netdev_ops = {
 866         .ndo_open               = tc35815_open,
 867         .ndo_stop               = tc35815_close,
 868         .ndo_start_xmit         = tc35815_send_packet,
 869         .ndo_get_stats          = tc35815_get_stats,
 870         .ndo_set_multicast_list = tc35815_set_multicast_list,
 871         .ndo_tx_timeout         = tc35815_tx_timeout,
 872         .ndo_do_ioctl           = tc35815_ioctl,
 873         .ndo_validate_addr      = eth_validate_addr,
 874         .ndo_change_mtu         = eth_change_mtu,
 875         .ndo_set_mac_address    = eth_mac_addr,
 876 #ifdef CONFIG_NET_POLL_CONTROLLER
 877         .ndo_poll_controller    = tc35815_poll_controller,
 878 #endif
 879 };
 880
 881 static int __devinit tc35815_init_one(struct pci_dev *pdev,
 882                                       const struct pci_device_id *ent)
 883 {
 884         void __iomem *ioaddr = NULL;
 885         struct net_device *dev;
 886         struct tc35815_local *lp;
 887         int rc;
 888
 889         static int printed_version;
 890         if (!printed_version++) {
 891                 printk(version);
 892                 dev_printk(KERN_DEBUG, &pdev->dev,
 893                            "speed:%d duplex:%d\n",
 894                            options.speed, options.duplex);
 895         }
 896
 897         if (!pdev->irq) {
 898                 dev_warn(&pdev->dev, "no IRQ assigned.\n");
 899                 return -ENODEV;
 900         }
 901
 902         /* dev zeroed in alloc_etherdev */
 903         dev = alloc_etherdev(sizeof(*lp));
 904         if (dev == NULL) {
 905                 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
 906                 return -ENOMEM;
 907         }
 908         SET_NETDEV_DEV(dev, &pdev->dev);
 909         lp = netdev_priv(dev);
 910         lp->dev = dev;
 911
 912         /* enable device (incl. PCI PM wakeup), and bus-mastering */
 913         rc = pcim_enable_device(pdev);
 914         if (rc)
 915                 goto err_out;
 916         rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
 917         if (rc)
 918                 goto err_out;
 919         pci_set_master(pdev);
 920         ioaddr = pcim_iomap_table(pdev)[1];
 921
 922         /* Initialize the device structure. */
 923         dev->netdev_ops = &tc35815_netdev_ops;
 924         dev->ethtool_ops = &tc35815_ethtool_ops;
 925         dev->watchdog_timeo = TC35815_TX_TIMEOUT;
 926 #ifdef TC35815_NAPI
 927         netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
 928 #endif
 929
 930         dev->irq = pdev->irq;
 931         dev->base_addr = (unsigned long)ioaddr;
 932
 933         INIT_WORK(&lp->restart_work, tc35815_restart_work);
 934         spin_lock_init(&lp->lock);
 935         lp->pci_dev = pdev;
 936         lp->chiptype = ent->driver_data;
 937
 938         lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
 939         pci_set_drvdata(pdev, dev);
 940
 941         /* Soft reset the chip. */
 942         tc35815_chip_reset(dev);
 943
 944         /* Retrieve the ethernet address. */
 945         if (tc35815_init_dev_addr(dev)) {
 946                 dev_warn(&pdev->dev, "not valid ether addr\n");
 947                 random_ether_addr(dev->dev_addr);
 948         }
 949
 950         rc = register_netdev(dev);
 951         if (rc)
 952                 goto err_out;
 953
 954         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
 955         printk(KERN_INFO "%s: %s at 0x%lx, %pM, IRQ %d\n",
 956                 dev->name,
 957                 chip_info[ent->driver_data].name,
 958                 dev->base_addr,
 959                 dev->dev_addr,
 960                 dev->irq);
 961
 962         rc = tc_mii_init(dev);
 963         if (rc)
 964                 goto err_out_unregister;
 965
 966         return 0;
 967
 968 err_out_unregister:
 969         unregister_netdev(dev);
 970 err_out:
 971         free_netdev(dev);
 972         return rc;
 973 }
 974
 975
 976 static void __devexit tc35815_remove_one(struct pci_dev *pdev)
 977 {
 978         struct net_device *dev = pci_get_drvdata(pdev);
 979         struct tc35815_local *lp = netdev_priv(dev);
 980
 981         phy_disconnect(lp->phy_dev);
 982         mdiobus_unregister(lp->mii_bus);
 983         kfree(lp->mii_bus->irq);
 984         mdiobus_free(lp->mii_bus);
 985         unregister_netdev(dev);
 986         free_netdev(dev);
 987         pci_set_drvdata(pdev, NULL);
 988 }
 989
 990 static int
 991 tc35815_init_queues(struct net_device *dev)
 992 {
 993         struct tc35815_local *lp = netdev_priv(dev);
 994         int i;
 995         unsigned long fd_addr;
 996
 997         if (!lp->fd_buf) {
 998                 BUG_ON(sizeof(struct FDesc) +
 999                        sizeof(struct BDesc) * RX_BUF_NUM +
1000                        sizeof(struct FDesc) * RX_FD_NUM +
1001                        sizeof(struct TxFD) * TX_FD_NUM >
1002                        PAGE_SIZE * FD_PAGE_NUM);
1003
1004                 lp->fd_buf = pci_alloc_consistent(lp->pci_dev,
1005                                                   PAGE_SIZE * FD_PAGE_NUM,
1006                                                   &lp->fd_buf_dma);
1007                 if (!lp->fd_buf)
1008                         return -ENOMEM;
1009                 for (i = 0; i < RX_BUF_NUM; i++) {
1010 #ifdef TC35815_USE_PACKEDBUFFER
1011                         lp->data_buf[i] =
1012                                 alloc_rxbuf_page(lp->pci_dev,
1013                                                  &lp->data_buf_dma[i]);
1014                         if (!lp->data_buf[i]) {
1015                                 while (--i >= 0) {
1016                                         free_rxbuf_page(lp->pci_dev,
1017                                                         lp->data_buf[i],
1018                                                         lp->data_buf_dma[i]);
1019                                         lp->data_buf[i] = NULL;
1020                                 }
1021                                 pci_free_consistent(lp->pci_dev,
1022                                                     PAGE_SIZE * FD_PAGE_NUM,
1023                                                     lp->fd_buf,
1024                                                     lp->fd_buf_dma);
1025                                 lp->fd_buf = NULL;
1026                                 return -ENOMEM;
1027                         }
1028 #else
1029                         lp->rx_skbs[i].skb =
1030                                 alloc_rxbuf_skb(dev, lp->pci_dev,
1031                                                 &lp->rx_skbs[i].skb_dma);
1032                         if (!lp->rx_skbs[i].skb) {
1033                                 while (--i >= 0) {
1034                                         free_rxbuf_skb(lp->pci_dev,
1035                                                        lp->rx_skbs[i].skb,
1036                                                        lp->rx_skbs[i].skb_dma);
1037                                         lp->rx_skbs[i].skb = NULL;
1038                                 }
1039                                 pci_free_consistent(lp->pci_dev,
1040                                                     PAGE_SIZE * FD_PAGE_NUM,
1041                                                     lp->fd_buf,
1042                                                     lp->fd_buf_dma);
1043                                 lp->fd_buf = NULL;
1044                                 return -ENOMEM;
1045                         }
1046 #endif
1047                 }
1048                 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
1049                        dev->name, lp->fd_buf);
1050 #ifdef TC35815_USE_PACKEDBUFFER
1051                 printk(" DataBuf");
1052                 for (i = 0; i < RX_BUF_NUM; i++)
1053                         printk(" %p", lp->data_buf[i]);
1054 #endif
1055                 printk("\n");
1056         } else {
1057                 for (i = 0; i < FD_PAGE_NUM; i++)
1058                         clear_page((void *)((unsigned long)lp->fd_buf +
1059                                             i * PAGE_SIZE));
1060         }
1061         fd_addr = (unsigned long)lp->fd_buf;
1062
1063         /* Free Descriptors (for Receive) */
1064         lp->rfd_base = (struct RxFD *)fd_addr;
1065         fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
1066         for (i = 0; i < RX_FD_NUM; i++)
1067                 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
1068         lp->rfd_cur = lp->rfd_base;
1069         lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
1070
1071         /* Transmit Descriptors */
1072         lp->tfd_base = (struct TxFD *)fd_addr;
1073         fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
1074         for (i = 0; i < TX_FD_NUM; i++) {
1075                 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
1076                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1077                 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
1078         }
1079         lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
1080         lp->tfd_start = 0;
1081         lp->tfd_end = 0;
1082
1083         /* Buffer List (for Receive) */
1084         lp->fbl_ptr = (struct FrFD *)fd_addr;
1085         lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
1086         lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
1087 #ifndef TC35815_USE_PACKEDBUFFER
1088         /*
1089          * move all allocated skbs to head of rx_skbs[] array.
1090          * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
1091          * tc35815_rx() had failed.
1092          */
1093         lp->fbl_count = 0;
1094         for (i = 0; i < RX_BUF_NUM; i++) {
1095                 if (lp->rx_skbs[i].skb) {
1096                         if (i != lp->fbl_count) {
1097                                 lp->rx_skbs[lp->fbl_count].skb =
1098                                         lp->rx_skbs[i].skb;
1099                                 lp->rx_skbs[lp->fbl_count].skb_dma =
1100                                         lp->rx_skbs[i].skb_dma;
1101                         }
1102                         lp->fbl_count++;
1103                 }
1104         }
1105 #endif
1106         for (i = 0; i < RX_BUF_NUM; i++) {
1107 #ifdef TC35815_USE_PACKEDBUFFER
1108                 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
1109 #else
1110                 if (i >= lp->fbl_count) {
1111                         lp->fbl_ptr->bd[i].BuffData = 0;
1112                         lp->fbl_ptr->bd[i].BDCtl = 0;
1113                         continue;
1114                 }
1115                 lp->fbl_ptr->bd[i].BuffData =
1116                         cpu_to_le32(lp->rx_skbs[i].skb_dma);
1117 #endif
1118                 /* BDID is index of FrFD.bd[] */
1119                 lp->fbl_ptr->bd[i].BDCtl =
1120                         cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
1121                                     RX_BUF_SIZE);
1122         }
1123 #ifdef TC35815_USE_PACKEDBUFFER
1124         lp->fbl_curid = 0;
1125 #endif
1126
1127         printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
1128                dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
1129         return 0;
1130 }
1131
1132 static void
1133 tc35815_clear_queues(struct net_device *dev)
1134 {
1135         struct tc35815_local *lp = netdev_priv(dev);
1136         int i;
1137
1138         for (i = 0; i < TX_FD_NUM; i++) {
1139                 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1140                 struct sk_buff *skb =
1141                         fdsystem != 0xffffffff ?
1142                         lp->tx_skbs[fdsystem].skb : NULL;
1143 #ifdef DEBUG
1144                 if (lp->tx_skbs[i].skb != skb) {
1145                         printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1146                         panic_queues(dev);
1147                 }
1148 #else
1149                 BUG_ON(lp->tx_skbs[i].skb != skb);
1150 #endif
1151                 if (skb) {
1152                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1153                         lp->tx_skbs[i].skb = NULL;
1154                         lp->tx_skbs[i].skb_dma = 0;
1155                         dev_kfree_skb_any(skb);
1156                 }
1157                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1158         }
1159
1160         tc35815_init_queues(dev);
1161 }
1162
1163 static void
1164 tc35815_free_queues(struct net_device *dev)
1165 {
1166         struct tc35815_local *lp = netdev_priv(dev);
1167         int i;
1168
1169         if (lp->tfd_base) {
1170                 for (i = 0; i < TX_FD_NUM; i++) {
1171                         u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1172                         struct sk_buff *skb =
1173                                 fdsystem != 0xffffffff ?
1174                                 lp->tx_skbs[fdsystem].skb : NULL;
1175 #ifdef DEBUG
1176                         if (lp->tx_skbs[i].skb != skb) {
1177                                 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1178                                 panic_queues(dev);
1179                         }
1180 #else
1181                         BUG_ON(lp->tx_skbs[i].skb != skb);
1182 #endif
1183                         if (skb) {
1184                                 dev_kfree_skb(skb);
1185                                 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1186                                 lp->tx_skbs[i].skb = NULL;
1187                                 lp->tx_skbs[i].skb_dma = 0;
1188                         }
1189                         lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1190                 }
1191         }
1192
1193         lp->rfd_base = NULL;
1194         lp->rfd_limit = NULL;
1195         lp->rfd_cur = NULL;
1196         lp->fbl_ptr = NULL;
1197
1198         for (i = 0; i < RX_BUF_NUM; i++) {
1199 #ifdef TC35815_USE_PACKEDBUFFER
1200                 if (lp->data_buf[i]) {
1201                         free_rxbuf_page(lp->pci_dev,
1202                                         lp->data_buf[i], lp->data_buf_dma[i]);
1203                         lp->data_buf[i] = NULL;
1204                 }
1205 #else
1206                 if (lp->rx_skbs[i].skb) {
1207                         free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1208                                        lp->rx_skbs[i].skb_dma);
1209                         lp->rx_skbs[i].skb = NULL;
1210                 }
1211 #endif
1212         }
1213         if (lp->fd_buf) {
1214                 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1215                                     lp->fd_buf, lp->fd_buf_dma);
1216                 lp->fd_buf = NULL;
1217         }
1218 }
1219
1220 static void
1221 dump_txfd(struct TxFD *fd)
1222 {
1223         printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1224                le32_to_cpu(fd->fd.FDNext),
1225                le32_to_cpu(fd->fd.FDSystem),
1226                le32_to_cpu(fd->fd.FDStat),
1227                le32_to_cpu(fd->fd.FDCtl));
1228         printk("BD: ");
1229         printk(" %08x %08x",
1230                le32_to_cpu(fd->bd.BuffData),
1231                le32_to_cpu(fd->bd.BDCtl));
1232         printk("\n");
1233 }
1234
1235 static int
1236 dump_rxfd(struct RxFD *fd)
1237 {
1238         int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1239         if (bd_count > 8)
1240                 bd_count = 8;
1241         printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1242                le32_to_cpu(fd->fd.FDNext),
1243                le32_to_cpu(fd->fd.FDSystem),
1244                le32_to_cpu(fd->fd.FDStat),
1245                le32_to_cpu(fd->fd.FDCtl));
1246         if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1247                 return 0;
1248         printk("BD: ");
1249         for (i = 0; i < bd_count; i++)
1250                 printk(" %08x %08x",
1251                        le32_to_cpu(fd->bd[i].BuffData),
1252                        le32_to_cpu(fd->bd[i].BDCtl));
1253         printk("\n");
1254         return bd_count;
1255 }
1256
1257 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1258 static void
1259 dump_frfd(struct FrFD *fd)
1260 {
1261         int i;
1262         printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1263                le32_to_cpu(fd->fd.FDNext),
1264                le32_to_cpu(fd->fd.FDSystem),
1265                le32_to_cpu(fd->fd.FDStat),
1266                le32_to_cpu(fd->fd.FDCtl));
1267         printk("BD: ");
1268         for (i = 0; i < RX_BUF_NUM; i++)
1269                 printk(" %08x %08x",
1270                        le32_to_cpu(fd->bd[i].BuffData),
1271                        le32_to_cpu(fd->bd[i].BDCtl));
1272         printk("\n");
1273 }
1274 #endif
1275
1276 #ifdef DEBUG
1277 static void
1278 panic_queues(struct net_device *dev)
1279 {
1280         struct tc35815_local *lp = netdev_priv(dev);
1281         int i;
1282
1283         printk("TxFD base %p, start %u, end %u\n",
1284                lp->tfd_base, lp->tfd_start, lp->tfd_end);
1285         printk("RxFD base %p limit %p cur %p\n",
1286                lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1287         printk("FrFD %p\n", lp->fbl_ptr);
1288         for (i = 0; i < TX_FD_NUM; i++)
1289                 dump_txfd(&lp->tfd_base[i]);
1290         for (i = 0; i < RX_FD_NUM; i++) {
1291                 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1292                 i += (bd_count + 1) / 2;        /* skip BDs */
1293         }
1294         dump_frfd(lp->fbl_ptr);
1295         panic("%s: Illegal queue state.", dev->name);
1296 }
1297 #endif
1298
1299 static void print_eth(const u8 *add)
1300 {
1301         printk(KERN_DEBUG "print_eth(%p)\n", add);
1302         printk(KERN_DEBUG " %pM => %pM : %02x%02x\n",
1303                 add + 6, add, add[12], add[13]);
1304 }
1305
1306 static int tc35815_tx_full(struct net_device *dev)
1307 {
1308         struct tc35815_local *lp = netdev_priv(dev);
1309         return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1310 }
1311
1312 static void tc35815_restart(struct net_device *dev)
1313 {
1314         struct tc35815_local *lp = netdev_priv(dev);
1315
1316         if (lp->phy_dev) {
1317                 int timeout;
1318
1319                 phy_write(lp->phy_dev, MII_BMCR, BMCR_RESET);
1320                 timeout = 100;
1321                 while (--timeout) {
1322                         if (!(phy_read(lp->phy_dev, MII_BMCR) & BMCR_RESET))
1323                                 break;
1324                         udelay(1);
1325                 }
1326                 if (!timeout)
1327                         printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1328         }
1329
1330         spin_lock_irq(&lp->lock);
1331         tc35815_chip_reset(dev);
1332         tc35815_clear_queues(dev);
1333         tc35815_chip_init(dev);
1334         /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1335         tc35815_set_multicast_list(dev);
1336         spin_unlock_irq(&lp->lock);
1337
1338         netif_wake_queue(dev);
1339 }
1340
1341 static void tc35815_restart_work(struct work_struct *work)
1342 {
1343         struct tc35815_local *lp =
1344                 container_of(work, struct tc35815_local, restart_work);
1345         struct net_device *dev = lp->dev;
1346
1347         tc35815_restart(dev);
1348 }
1349
1350 static void tc35815_schedule_restart(struct net_device *dev)
1351 {
1352         struct tc35815_local *lp = netdev_priv(dev);
1353         struct tc35815_regs __iomem *tr =
1354                 (struct tc35815_regs __iomem *)dev->base_addr;
1355
1356         /* disable interrupts */
1357         tc_writel(0, &tr->Int_En);
1358         tc_writel(tc_readl(&tr->DMA_Ctl) | DMA_IntMask, &tr->DMA_Ctl);
1359         schedule_work(&lp->restart_work);
1360 }
1361
1362 static void tc35815_tx_timeout(struct net_device *dev)
1363 {
1364         struct tc35815_regs __iomem *tr =
1365                 (struct tc35815_regs __iomem *)dev->base_addr;
1366
1367         printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1368                dev->name, tc_readl(&tr->Tx_Stat));
1369
1370         /* Try to restart the adaptor. */
1371         tc35815_schedule_restart(dev);
1372         dev->stats.tx_errors++;
1373 }
1374
1375 /*
1376  * Open/initialize the controller. This is called (in the current kernel)
1377  * sometime after booting when the 'ifconfig' program is run.
1378  *
1379  * This routine should set everything up anew at each open, even
1380  * registers that "should" only need to be set once at boot, so that
1381  * there is non-reboot way to recover if something goes wrong.
1382  */
1383 static int
1384 tc35815_open(struct net_device *dev)
1385 {
1386         struct tc35815_local *lp = netdev_priv(dev);
1387
1388         /*
1389          * This is used if the interrupt line can turned off (shared).
1390          * See 3c503.c for an example of selecting the IRQ at config-time.
1391          */
1392         if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED,
1393                         dev->name, dev))
1394                 return -EAGAIN;
1395
1396         tc35815_chip_reset(dev);
1397
1398         if (tc35815_init_queues(dev) != 0) {
1399                 free_irq(dev->irq, dev);
1400                 return -EAGAIN;
1401         }
1402
1403 #ifdef TC35815_NAPI
1404         napi_enable(&lp->napi);
1405 #endif
1406
1407         /* Reset the hardware here. Don't forget to set the station address. */
1408         spin_lock_irq(&lp->lock);
1409         tc35815_chip_init(dev);
1410         spin_unlock_irq(&lp->lock);
1411
1412         netif_carrier_off(dev);
1413         /* schedule a link state check */
1414         phy_start(lp->phy_dev);
1415
1416         /* We are now ready to accept transmit requeusts from
1417          * the queueing layer of the networking.
1418          */
1419         netif_start_queue(dev);
1420
1421         return 0;
1422 }
1423
1424 /* This will only be invoked if your driver is _not_ in XOFF state.
1425  * What this means is that you need not check it, and that this
1426  * invariant will hold if you make sure that the netif_*_queue()
1427  * calls are done at the proper times.
1428  */
1429 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1430 {
1431         struct tc35815_local *lp = netdev_priv(dev);
1432         struct TxFD *txfd;
1433         unsigned long flags;
1434
1435         /* If some error occurs while trying to transmit this
1436          * packet, you should return '1' from this function.
1437          * In such a case you _may not_ do anything to the
1438          * SKB, it is still owned by the network queueing
1439          * layer when an error is returned.  This means you
1440          * may not modify any SKB fields, you may not free
1441          * the SKB, etc.
1442          */
1443
1444         /* This is the most common case for modern hardware.
1445          * The spinlock protects this code from the TX complete
1446          * hardware interrupt handler.  Queue flow control is
1447          * thus managed under this lock as well.
1448          */
1449         spin_lock_irqsave(&lp->lock, flags);
1450
1451         /* failsafe... (handle txdone now if half of FDs are used) */
1452         if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1453             TX_FD_NUM / 2)
1454                 tc35815_txdone(dev);
1455
1456         if (netif_msg_pktdata(lp))
1457                 print_eth(skb->data);
1458 #ifdef DEBUG
1459         if (lp->tx_skbs[lp->tfd_start].skb) {
1460                 printk("%s: tx_skbs conflict.\n", dev->name);
1461                 panic_queues(dev);
1462         }
1463 #else
1464         BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1465 #endif
1466         lp->tx_skbs[lp->tfd_start].skb = skb;
1467         lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1468
1469         /*add to ring */
1470         txfd = &lp->tfd_base[lp->tfd_start];
1471         txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1472         txfd->bd.BDCtl = cpu_to_le32(skb->len);
1473         txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1474         txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1475
1476         if (lp->tfd_start == lp->tfd_end) {
1477                 struct tc35815_regs __iomem *tr =
1478                         (struct tc35815_regs __iomem *)dev->base_addr;
1479                 /* Start DMA Transmitter. */
1480                 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1481 #ifdef GATHER_TXINT
1482                 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1483 #endif
1484                 if (netif_msg_tx_queued(lp)) {
1485                         printk("%s: starting TxFD.\n", dev->name);
1486                         dump_txfd(txfd);
1487                 }
1488                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1489         } else {
1490                 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1491                 if (netif_msg_tx_queued(lp)) {
1492                         printk("%s: queueing TxFD.\n", dev->name);
1493                         dump_txfd(txfd);
1494                 }
1495         }
1496         lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1497
1498         dev->trans_start = jiffies;
1499
1500         /* If we just used up the very last entry in the
1501          * TX ring on this device, tell the queueing
1502          * layer to send no more.
1503          */
1504         if (tc35815_tx_full(dev)) {
1505                 if (netif_msg_tx_queued(lp))
1506                         printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1507                 netif_stop_queue(dev);
1508         }
1509
1510         /* When the TX completion hw interrupt arrives, this
1511          * is when the transmit statistics are updated.
1512          */
1513
1514         spin_unlock_irqrestore(&lp->lock, flags);
1515         return 0;
1516 }
1517
1518 #define FATAL_ERROR_INT \
1519         (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1520 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1521 {
1522         static int count;
1523         printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1524                dev->name, status);
1525         if (status & Int_IntPCI)
1526                 printk(" IntPCI");
1527         if (status & Int_DmParErr)
1528                 printk(" DmParErr");
1529         if (status & Int_IntNRAbt)
1530                 printk(" IntNRAbt");
1531         printk("\n");
1532         if (count++ > 100)
1533                 panic("%s: Too many fatal errors.", dev->name);
1534         printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1535         /* Try to restart the adaptor. */
1536         tc35815_schedule_restart(dev);
1537 }
1538
1539 #ifdef TC35815_NAPI
1540 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1541 #else
1542 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1543 #endif
1544 {
1545         struct tc35815_local *lp = netdev_priv(dev);
1546         struct tc35815_regs __iomem *tr =
1547                 (struct tc35815_regs __iomem *)dev->base_addr;
1548         int ret = -1;
1549
1550         /* Fatal errors... */
1551         if (status & FATAL_ERROR_INT) {
1552                 tc35815_fatal_error_interrupt(dev, status);
1553                 return 0;
1554         }
1555         /* recoverable errors */
1556         if (status & Int_IntFDAEx) {
1557                 /* disable FDAEx int. (until we make rooms...) */
1558                 tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
1559                 printk(KERN_WARNING
1560                        "%s: Free Descriptor Area Exhausted (%#x).\n",
1561                        dev->name, status);
1562                 dev->stats.rx_dropped++;
1563                 ret = 0;
1564         }
1565         if (status & Int_IntBLEx) {
1566                 /* disable BLEx int. (until we make rooms...) */
1567                 tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
1568                 printk(KERN_WARNING
1569                        "%s: Buffer List Exhausted (%#x).\n",
1570                        dev->name, status);
1571                 dev->stats.rx_dropped++;
1572                 ret = 0;
1573         }
1574         if (status & Int_IntExBD) {
1575                 printk(KERN_WARNING
1576                        "%s: Excessive Buffer Descriptiors (%#x).\n",
1577                        dev->name, status);
1578                 dev->stats.rx_length_errors++;
1579                 ret = 0;
1580         }
1581
1582         /* normal notification */
1583         if (status & Int_IntMacRx) {
1584                 /* Got a packet(s). */
1585 #ifdef TC35815_NAPI
1586                 ret = tc35815_rx(dev, limit);
1587 #else
1588                 tc35815_rx(dev);
1589                 ret = 0;
1590 #endif
1591                 lp->lstats.rx_ints++;
1592         }
1593         if (status & Int_IntMacTx) {
1594                 /* Transmit complete. */
1595                 lp->lstats.tx_ints++;
1596                 tc35815_txdone(dev);
1597                 netif_wake_queue(dev);
1598                 ret = 0;
1599         }
1600         return ret;
1601 }
1602
1603 /*
1604  * The typical workload of the driver:
1605  * Handle the network interface interrupts.
1606  */
1607 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1608 {
1609         struct net_device *dev = dev_id;
1610         struct tc35815_local *lp = netdev_priv(dev);
1611         struct tc35815_regs __iomem *tr =
1612                 (struct tc35815_regs __iomem *)dev->base_addr;
1613 #ifdef TC35815_NAPI
1614         u32 dmactl = tc_readl(&tr->DMA_Ctl);
1615
1616         if (!(dmactl & DMA_IntMask)) {
1617                 /* disable interrupts */
1618                 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1619                 if (napi_schedule_prep(&lp->napi))
1620                         __napi_schedule(&lp->napi);
1621                 else {
1622                         printk(KERN_ERR "%s: interrupt taken in poll\n",
1623                                dev->name);
1624                         BUG();
1625                 }
1626                 (void)tc_readl(&tr->Int_Src);   /* flush */
1627                 return IRQ_HANDLED;
1628         }
1629         return IRQ_NONE;
1630 #else
1631         int handled;
1632         u32 status;
1633
1634         spin_lock(&lp->lock);
1635         status = tc_readl(&tr->Int_Src);
1636         tc_writel(status, &tr->Int_Src);        /* write to clear */
1637         handled = tc35815_do_interrupt(dev, status);
1638         (void)tc_readl(&tr->Int_Src);   /* flush */
1639         spin_unlock(&lp->lock);
1640         return IRQ_RETVAL(handled >= 0);
1641 #endif /* TC35815_NAPI */
1642 }
1643
1644 #ifdef CONFIG_NET_POLL_CONTROLLER
1645 static void tc35815_poll_controller(struct net_device *dev)
1646 {
1647         disable_irq(dev->irq);
1648         tc35815_interrupt(dev->irq, dev);
1649         enable_irq(dev->irq);
1650 }
1651 #endif
1652
1653 /* We have a good packet(s), get it/them out of the buffers. */
1654 #ifdef TC35815_NAPI
1655 static int
1656 tc35815_rx(struct net_device *dev, int limit)
1657 #else
1658 static void
1659 tc35815_rx(struct net_device *dev)
1660 #endif
1661 {
1662         struct tc35815_local *lp = netdev_priv(dev);
1663         unsigned int fdctl;
1664         int i;
1665         int buf_free_count = 0;
1666         int fd_free_count = 0;
1667 #ifdef TC35815_NAPI
1668         int received = 0;
1669 #endif
1670
1671         while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1672                 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1673                 int pkt_len = fdctl & FD_FDLength_MASK;
1674                 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1675 #ifdef DEBUG
1676                 struct RxFD *next_rfd;
1677 #endif
1678 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1679                 pkt_len -= ETH_FCS_LEN;
1680 #endif
1681
1682                 if (netif_msg_rx_status(lp))
1683                         dump_rxfd(lp->rfd_cur);
1684                 if (status & Rx_Good) {
1685                         struct sk_buff *skb;
1686                         unsigned char *data;
1687                         int cur_bd;
1688 #ifdef TC35815_USE_PACKEDBUFFER
1689                         int offset;
1690 #endif
1691
1692 #ifdef TC35815_NAPI
1693                         if (--limit < 0)
1694                                 break;
1695 #endif
1696 #ifdef TC35815_USE_PACKEDBUFFER
1697                         BUG_ON(bd_count > 2);
1698                         skb = dev_alloc_skb(pkt_len + NET_IP_ALIGN);
1699                         if (skb == NULL) {
1700                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1701                                        dev->name);
1702                                 dev->stats.rx_dropped++;
1703                                 break;
1704                         }
1705                         skb_reserve(skb, NET_IP_ALIGN);
1706
1707                         data = skb_put(skb, pkt_len);
1708
1709                         /* copy from receive buffer */
1710                         cur_bd = 0;
1711                         offset = 0;
1712                         while (offset < pkt_len && cur_bd < bd_count) {
1713                                 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1714                                         BD_BuffLength_MASK;
1715                                 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1716                                 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1717                                 if (offset + len > pkt_len)
1718                                         len = pkt_len - offset;
1719 #ifdef TC35815_DMA_SYNC_ONDEMAND
1720                                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1721                                                             dma, len,
1722                                                             PCI_DMA_FROMDEVICE);
1723 #endif
1724                                 memcpy(data + offset, rxbuf, len);
1725 #ifdef TC35815_DMA_SYNC_ONDEMAND
1726                                 pci_dma_sync_single_for_device(lp->pci_dev,
1727                                                                dma, len,
1728                                                                PCI_DMA_FROMDEVICE);
1729 #endif
1730                                 offset += len;
1731                                 cur_bd++;
1732                         }
1733 #else /* TC35815_USE_PACKEDBUFFER */
1734                         BUG_ON(bd_count > 1);
1735                         cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1736                                   & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1737 #ifdef DEBUG
1738                         if (cur_bd >= RX_BUF_NUM) {
1739                                 printk("%s: invalid BDID.\n", dev->name);
1740                                 panic_queues(dev);
1741                         }
1742                         BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1743                                (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1744                         if (!lp->rx_skbs[cur_bd].skb) {
1745                                 printk("%s: NULL skb.\n", dev->name);
1746                                 panic_queues(dev);
1747                         }
1748 #else
1749                         BUG_ON(cur_bd >= RX_BUF_NUM);
1750 #endif
1751                         skb = lp->rx_skbs[cur_bd].skb;
1752                         prefetch(skb->data);
1753                         lp->rx_skbs[cur_bd].skb = NULL;
1754                         pci_unmap_single(lp->pci_dev,
1755                                          lp->rx_skbs[cur_bd].skb_dma,
1756                                          RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1757                         if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
1758                                 memmove(skb->data, skb->data - NET_IP_ALIGN,
1759                                         pkt_len);
1760                         data = skb_put(skb, pkt_len);
1761 #endif /* TC35815_USE_PACKEDBUFFER */
1762                         if (netif_msg_pktdata(lp))
1763                                 print_eth(data);
1764                         skb->protocol = eth_type_trans(skb, dev);
1765 #ifdef TC35815_NAPI
1766                         netif_receive_skb(skb);
1767                         received++;
1768 #else
1769                         netif_rx(skb);
1770 #endif
1771                         dev->stats.rx_packets++;
1772                         dev->stats.rx_bytes += pkt_len;
1773                 } else {
1774                         dev->stats.rx_errors++;
1775                         printk(KERN_DEBUG "%s: Rx error (status %x)\n",
1776                                dev->name, status & Rx_Stat_Mask);
1777                         /* WORKAROUND: LongErr and CRCErr means Overflow. */
1778                         if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1779                                 status &= ~(Rx_LongErr|Rx_CRCErr);
1780                                 status |= Rx_Over;
1781                         }
1782                         if (status & Rx_LongErr)
1783                                 dev->stats.rx_length_errors++;
1784                         if (status & Rx_Over)
1785                                 dev->stats.rx_fifo_errors++;
1786                         if (status & Rx_CRCErr)
1787                                 dev->stats.rx_crc_errors++;
1788                         if (status & Rx_Align)
1789                                 dev->stats.rx_frame_errors++;
1790                 }
1791
1792                 if (bd_count > 0) {
1793                         /* put Free Buffer back to controller */
1794                         int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1795                         unsigned char id =
1796                                 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1797 #ifdef DEBUG
1798                         if (id >= RX_BUF_NUM) {
1799                                 printk("%s: invalid BDID.\n", dev->name);
1800                                 panic_queues(dev);
1801                         }
1802 #else
1803                         BUG_ON(id >= RX_BUF_NUM);
1804 #endif
1805                         /* free old buffers */
1806 #ifdef TC35815_USE_PACKEDBUFFER
1807                         while (lp->fbl_curid != id)
1808 #else
1809                         lp->fbl_count--;
1810                         while (lp->fbl_count < RX_BUF_NUM)
1811 #endif
1812                         {
1813 #ifdef TC35815_USE_PACKEDBUFFER
1814                                 unsigned char curid = lp->fbl_curid;
1815 #else
1816                                 unsigned char curid =
1817                                         (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1818 #endif
1819                                 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1820 #ifdef DEBUG
1821                                 bdctl = le32_to_cpu(bd->BDCtl);
1822                                 if (bdctl & BD_CownsBD) {
1823                                         printk("%s: Freeing invalid BD.\n",
1824                                                dev->name);
1825                                         panic_queues(dev);
1826                                 }
1827 #endif
1828                                 /* pass BD to controller */
1829 #ifndef TC35815_USE_PACKEDBUFFER
1830                                 if (!lp->rx_skbs[curid].skb) {
1831                                         lp->rx_skbs[curid].skb =
1832                                                 alloc_rxbuf_skb(dev,
1833                                                                 lp->pci_dev,
1834                                                                 &lp->rx_skbs[curid].skb_dma);
1835                                         if (!lp->rx_skbs[curid].skb)
1836                                                 break; /* try on next reception */
1837                                         bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1838                                 }
1839 #endif /* TC35815_USE_PACKEDBUFFER */
1840                                 /* Note: BDLength was modified by chip. */
1841                                 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1842                                                         (curid << BD_RxBDID_SHIFT) |
1843                                                         RX_BUF_SIZE);
1844 #ifdef TC35815_USE_PACKEDBUFFER
1845                                 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1846                                 if (netif_msg_rx_status(lp)) {
1847                                         printk("%s: Entering new FBD %d\n",
1848                                                dev->name, lp->fbl_curid);
1849                                         dump_frfd(lp->fbl_ptr);
1850                                 }
1851 #else
1852                                 lp->fbl_count++;
1853 #endif
1854                                 buf_free_count++;
1855                         }
1856                 }
1857
1858                 /* put RxFD back to controller */
1859 #ifdef DEBUG
1860                 next_rfd = fd_bus_to_virt(lp,
1861                                           le32_to_cpu(lp->rfd_cur->fd.FDNext));
1862                 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1863                         printk("%s: RxFD FDNext invalid.\n", dev->name);
1864                         panic_queues(dev);
1865                 }
1866 #endif
1867                 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1868                         /* pass FD to controller */
1869 #ifdef DEBUG
1870                         lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1871 #else
1872                         lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1873 #endif
1874                         lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1875                         lp->rfd_cur++;
1876                         fd_free_count++;
1877                 }
1878                 if (lp->rfd_cur > lp->rfd_limit)
1879                         lp->rfd_cur = lp->rfd_base;
1880 #ifdef DEBUG
1881                 if (lp->rfd_cur != next_rfd)
1882                         printk("rfd_cur = %p, next_rfd %p\n",
1883                                lp->rfd_cur, next_rfd);
1884 #endif
1885         }
1886
1887         /* re-enable BL/FDA Exhaust interrupts. */
1888         if (fd_free_count) {
1889                 struct tc35815_regs __iomem *tr =
1890                         (struct tc35815_regs __iomem *)dev->base_addr;
1891                 u32 en, en_old = tc_readl(&tr->Int_En);
1892                 en = en_old | Int_FDAExEn;
1893                 if (buf_free_count)
1894                         en |= Int_BLExEn;
1895                 if (en != en_old)
1896                         tc_writel(en, &tr->Int_En);
1897         }
1898 #ifdef TC35815_NAPI
1899         return received;
1900 #endif
1901 }
1902
1903 #ifdef TC35815_NAPI
1904 static int tc35815_poll(struct napi_struct *napi, int budget)
1905 {
1906         struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1907         struct net_device *dev = lp->dev;
1908         struct tc35815_regs __iomem *tr =
1909                 (struct tc35815_regs __iomem *)dev->base_addr;
1910         int received = 0, handled;
1911         u32 status;
1912
1913         spin_lock(&lp->lock);
1914         status = tc_readl(&tr->Int_Src);
1915         do {
1916                 tc_writel(status, &tr->Int_Src);        /* write to clear */
1917
1918                 handled = tc35815_do_interrupt(dev, status, budget - received);
1919                 if (handled >= 0) {
1920                         received += handled;
1921                         if (received >= budget)
1922                                 break;
1923                 }
1924                 status = tc_readl(&tr->Int_Src);
1925         } while (status);
1926         spin_unlock(&lp->lock);
1927
1928         if (received < budget) {
1929                 napi_complete(napi);
1930                 /* enable interrupts */
1931                 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1932         }
1933         return received;
1934 }
1935 #endif
1936
1937 #ifdef NO_CHECK_CARRIER
1938 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1939 #else
1940 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1941 #endif
1942
1943 static void
1944 tc35815_check_tx_stat(struct net_device *dev, int status)
1945 {
1946         struct tc35815_local *lp = netdev_priv(dev);
1947         const char *msg = NULL;
1948
1949         /* count collisions */
1950         if (status & Tx_ExColl)
1951                 dev->stats.collisions += 16;
1952         if (status & Tx_TxColl_MASK)
1953                 dev->stats.collisions += status & Tx_TxColl_MASK;
1954
1955 #ifndef NO_CHECK_CARRIER
1956         /* TX4939 does not have NCarr */
1957         if (lp->chiptype == TC35815_TX4939)
1958                 status &= ~Tx_NCarr;
1959 #ifdef WORKAROUND_LOSTCAR
1960         /* WORKAROUND: ignore LostCrS in full duplex operation */
1961         if (!lp->link || lp->duplex == DUPLEX_FULL)
1962                 status &= ~Tx_NCarr;
1963 #endif
1964 #endif
1965
1966         if (!(status & TX_STA_ERR)) {
1967                 /* no error. */
1968                 dev->stats.tx_packets++;
1969                 return;
1970         }
1971
1972         dev->stats.tx_errors++;
1973         if (status & Tx_ExColl) {
1974                 dev->stats.tx_aborted_errors++;
1975                 msg = "Excessive Collision.";
1976         }
1977         if (status & Tx_Under) {
1978                 dev->stats.tx_fifo_errors++;
1979                 msg = "Tx FIFO Underrun.";
1980                 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1981                         lp->lstats.tx_underrun++;
1982                         if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1983                                 struct tc35815_regs __iomem *tr =
1984                                         (struct tc35815_regs __iomem *)dev->base_addr;
1985                                 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1986                                 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1987                         }
1988                 }
1989         }
1990         if (status & Tx_Defer) {
1991                 dev->stats.tx_fifo_errors++;
1992                 msg = "Excessive Deferral.";
1993         }
1994 #ifndef NO_CHECK_CARRIER
1995         if (status & Tx_NCarr) {
1996                 dev->stats.tx_carrier_errors++;
1997                 msg = "Lost Carrier Sense.";
1998         }
1999 #endif
2000         if (status & Tx_LateColl) {
2001                 dev->stats.tx_aborted_errors++;
2002                 msg = "Late Collision.";
2003         }
2004         if (status & Tx_TxPar) {
2005                 dev->stats.tx_fifo_errors++;
2006                 msg = "Transmit Parity Error.";
2007         }
2008         if (status & Tx_SQErr) {
2009                 dev->stats.tx_heartbeat_errors++;
2010                 msg = "Signal Quality Error.";
2011         }
2012         if (msg && netif_msg_tx_err(lp))
2013                 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
2014 }
2015
2016 /* This handles TX complete events posted by the device
2017  * via interrupts.
2018  */
2019 static void
2020 tc35815_txdone(struct net_device *dev)
2021 {
2022         struct tc35815_local *lp = netdev_priv(dev);
2023         struct TxFD *txfd;
2024         unsigned int fdctl;
2025
2026         txfd = &lp->tfd_base[lp->tfd_end];
2027         while (lp->tfd_start != lp->tfd_end &&
2028                !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
2029                 int status = le32_to_cpu(txfd->fd.FDStat);
2030                 struct sk_buff *skb;
2031                 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
2032                 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
2033
2034                 if (netif_msg_tx_done(lp)) {
2035                         printk("%s: complete TxFD.\n", dev->name);
2036                         dump_txfd(txfd);
2037                 }
2038                 tc35815_check_tx_stat(dev, status);
2039
2040                 skb = fdsystem != 0xffffffff ?
2041                         lp->tx_skbs[fdsystem].skb : NULL;
2042 #ifdef DEBUG
2043                 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
2044                         printk("%s: tx_skbs mismatch.\n", dev->name);
2045                         panic_queues(dev);
2046                 }
2047 #else
2048                 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
2049 #endif
2050                 if (skb) {
2051                         dev->stats.tx_bytes += skb->len;
2052                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
2053                         lp->tx_skbs[lp->tfd_end].skb = NULL;
2054                         lp->tx_skbs[lp->tfd_end].skb_dma = 0;
2055 #ifdef TC35815_NAPI
2056                         dev_kfree_skb_any(skb);
2057 #else
2058                         dev_kfree_skb_irq(skb);
2059 #endif
2060                 }
2061                 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
2062
2063                 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
2064                 txfd = &lp->tfd_base[lp->tfd_end];
2065 #ifdef DEBUG
2066                 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
2067                         printk("%s: TxFD FDNext invalid.\n", dev->name);
2068                         panic_queues(dev);
2069                 }
2070 #endif
2071                 if (fdnext & FD_Next_EOL) {
2072                         /* DMA Transmitter has been stopping... */
2073                         if (lp->tfd_end != lp->tfd_start) {
2074                                 struct tc35815_regs __iomem *tr =
2075                                         (struct tc35815_regs __iomem *)dev->base_addr;
2076                                 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
2077                                 struct TxFD *txhead = &lp->tfd_base[head];
2078                                 int qlen = (lp->tfd_start + TX_FD_NUM
2079                                             - lp->tfd_end) % TX_FD_NUM;
2080
2081 #ifdef DEBUG
2082                                 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
2083                                         printk("%s: TxFD FDCtl invalid.\n", dev->name);
2084                                         panic_queues(dev);
2085                                 }
2086 #endif
2087                                 /* log max queue length */
2088                                 if (lp->lstats.max_tx_qlen < qlen)
2089                                         lp->lstats.max_tx_qlen = qlen;
2090
2091
2092                                 /* start DMA Transmitter again */
2093                                 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
2094 #ifdef GATHER_TXINT
2095                                 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
2096 #endif
2097                                 if (netif_msg_tx_queued(lp)) {
2098                                         printk("%s: start TxFD on queue.\n",
2099                                                dev->name);
2100                                         dump_txfd(txfd);
2101                                 }
2102                                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
2103                         }
2104                         break;
2105                 }
2106         }
2107
2108         /* If we had stopped the queue due to a "tx full"
2109          * condition, and space has now been made available,
2110          * wake up the queue.
2111          */
2112         if (netif_queue_stopped(dev) && !tc35815_tx_full(dev))
2113                 netif_wake_queue(dev);
2114 }
2115
2116 /* The inverse routine to tc35815_open(). */
2117 static int
2118 tc35815_close(struct net_device *dev)
2119 {
2120         struct tc35815_local *lp = netdev_priv(dev);
2121
2122         netif_stop_queue(dev);
2123 #ifdef TC35815_NAPI
2124         napi_disable(&lp->napi);
2125 #endif
2126         if (lp->phy_dev)
2127                 phy_stop(lp->phy_dev);
2128         cancel_work_sync(&lp->restart_work);
2129
2130         /* Flush the Tx and disable Rx here. */
2131         tc35815_chip_reset(dev);
2132         free_irq(dev->irq, dev);
2133
2134         tc35815_free_queues(dev);
2135
2136         return 0;
2137
2138 }
2139
2140 /*
2141  * Get the current statistics.
2142  * This may be called with the card open or closed.
2143  */
2144 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
2145 {
2146         struct tc35815_regs __iomem *tr =
2147                 (struct tc35815_regs __iomem *)dev->base_addr;
2148         if (netif_running(dev))
2149                 /* Update the statistics from the device registers. */
2150                 dev->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
2151
2152         return &dev->stats;
2153 }
2154
2155 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
2156 {
2157         struct tc35815_local *lp = netdev_priv(dev);
2158         struct tc35815_regs __iomem *tr =
2159                 (struct tc35815_regs __iomem *)dev->base_addr;
2160         int cam_index = index * 6;
2161         u32 cam_data;
2162         u32 saved_addr;
2163
2164         saved_addr = tc_readl(&tr->CAM_Adr);
2165
2166         if (netif_msg_hw(lp))
2167                 printk(KERN_DEBUG "%s: CAM %d: %pM\n",
2168                         dev->name, index, addr);
2169         if (index & 1) {
2170                 /* read modify write */
2171                 tc_writel(cam_index - 2, &tr->CAM_Adr);
2172                 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
2173                 cam_data |= addr[0] << 8 | addr[1];
2174                 tc_writel(cam_data, &tr->CAM_Data);
2175                 /* write whole word */
2176                 tc_writel(cam_index + 2, &tr->CAM_Adr);
2177                 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
2178                 tc_writel(cam_data, &tr->CAM_Data);
2179         } else {
2180                 /* write whole word */
2181                 tc_writel(cam_index, &tr->CAM_Adr);
2182                 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
2183                 tc_writel(cam_data, &tr->CAM_Data);
2184                 /* read modify write */
2185                 tc_writel(cam_index + 4, &tr->CAM_Adr);
2186                 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
2187                 cam_data |= addr[4] << 24 | (addr[5] << 16);
2188                 tc_writel(cam_data, &tr->CAM_Data);
2189         }
2190
2191         tc_writel(saved_addr, &tr->CAM_Adr);
2192 }
2193
2194
2195 /*
2196  * Set or clear the multicast filter for this adaptor.
2197  * num_addrs == -1      Promiscuous mode, receive all packets
2198  * num_addrs == 0       Normal mode, clear multicast list
2199  * num_addrs > 0        Multicast mode, receive normal and MC packets,
2200  *                      and do best-effort filtering.
2201  */
2202 static void
2203 tc35815_set_multicast_list(struct net_device *dev)
2204 {
2205         struct tc35815_regs __iomem *tr =
2206                 (struct tc35815_regs __iomem *)dev->base_addr;
2207
2208         if (dev->flags & IFF_PROMISC) {
2209 #ifdef WORKAROUND_100HALF_PROMISC
2210                 /* With some (all?) 100MHalf HUB, controller will hang
2211                  * if we enabled promiscuous mode before linkup... */
2212                 struct tc35815_local *lp = netdev_priv(dev);
2213
2214                 if (!lp->link)
2215                         return;
2216 #endif
2217                 /* Enable promiscuous mode */
2218                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2219         } else if ((dev->flags & IFF_ALLMULTI) ||
2220                   dev->mc_count > CAM_ENTRY_MAX - 3) {
2221                 /* CAM 0, 1, 20 are reserved. */
2222                 /* Disable promiscuous mode, use normal mode. */
2223                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2224         } else if (dev->mc_count) {
2225                 struct dev_mc_list *cur_addr = dev->mc_list;
2226                 int i;
2227                 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2228
2229                 tc_writel(0, &tr->CAM_Ctl);
2230                 /* Walk the address list, and load the filter */
2231                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2232                         if (!cur_addr)
2233                                 break;
2234                         /* entry 0,1 is reserved. */
2235                         tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2236                         ena_bits |= CAM_Ena_Bit(i + 2);
2237                 }
2238                 tc_writel(ena_bits, &tr->CAM_Ena);
2239                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2240         } else {
2241                 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2242                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2243         }
2244 }
2245
2246 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2247 {
2248         struct tc35815_local *lp = netdev_priv(dev);
2249         strcpy(info->driver, MODNAME);
2250         strcpy(info->version, DRV_VERSION);
2251         strcpy(info->bus_info, pci_name(lp->pci_dev));
2252 }
2253
2254 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2255 {
2256         struct tc35815_local *lp = netdev_priv(dev);
2257
2258         if (!lp->phy_dev)
2259                 return -ENODEV;
2260         return phy_ethtool_gset(lp->phy_dev, cmd);
2261 }
2262
2263 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2264 {
2265         struct tc35815_local *lp = netdev_priv(dev);
2266
2267         if (!lp->phy_dev)
2268                 return -ENODEV;
2269         return phy_ethtool_sset(lp->phy_dev, cmd);
2270 }
2271
2272 static u32 tc35815_get_msglevel(struct net_device *dev)
2273 {
2274         struct tc35815_local *lp = netdev_priv(dev);
2275         return lp->msg_enable;
2276 }
2277
2278 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2279 {
2280         struct tc35815_local *lp = netdev_priv(dev);
2281         lp->msg_enable = datum;
2282 }
2283
2284 static int tc35815_get_sset_count(struct net_device *dev, int sset)
2285 {
2286         struct tc35815_local *lp = netdev_priv(dev);
2287
2288         switch (sset) {
2289         case ETH_SS_STATS:
2290                 return sizeof(lp->lstats) / sizeof(int);
2291         default:
2292                 return -EOPNOTSUPP;
2293         }
2294 }
2295
2296 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2297 {
2298         struct tc35815_local *lp = netdev_priv(dev);
2299         data[0] = lp->lstats.max_tx_qlen;
2300         data[1] = lp->lstats.tx_ints;
2301         data[2] = lp->lstats.rx_ints;
2302         data[3] = lp->lstats.tx_underrun;
2303 }
2304
2305 static struct {
2306         const char str[ETH_GSTRING_LEN];
2307 } ethtool_stats_keys[] = {
2308         { "max_tx_qlen" },
2309         { "tx_ints" },
2310         { "rx_ints" },
2311         { "tx_underrun" },
2312 };
2313
2314 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2315 {
2316         memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2317 }
2318
2319 static const struct ethtool_ops tc35815_ethtool_ops = {
2320         .get_drvinfo            = tc35815_get_drvinfo,
2321         .get_settings           = tc35815_get_settings,
2322         .set_settings           = tc35815_set_settings,
2323         .get_link               = ethtool_op_get_link,
2324         .get_msglevel           = tc35815_get_msglevel,
2325         .set_msglevel           = tc35815_set_msglevel,
2326         .get_strings            = tc35815_get_strings,
2327         .get_sset_count         = tc35815_get_sset_count,
2328         .get_ethtool_stats      = tc35815_get_ethtool_stats,
2329 };
2330
2331 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2332 {
2333         struct tc35815_local *lp = netdev_priv(dev);
2334
2335         if (!netif_running(dev))
2336                 return -EINVAL;
2337         if (!lp->phy_dev)
2338                 return -ENODEV;
2339         return phy_mii_ioctl(lp->phy_dev, if_mii(rq), cmd);
2340 }
2341
2342 static void tc35815_chip_reset(struct net_device *dev)
2343 {
2344         struct tc35815_regs __iomem *tr =
2345                 (struct tc35815_regs __iomem *)dev->base_addr;
2346         int i;
2347         /* reset the controller */
2348         tc_writel(MAC_Reset, &tr->MAC_Ctl);
2349         udelay(4); /* 3200ns */
2350         i = 0;
2351         while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2352                 if (i++ > 100) {
2353                         printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2354                         break;
2355                 }
2356                 mdelay(1);
2357         }
2358         tc_writel(0, &tr->MAC_Ctl);
2359
2360         /* initialize registers to default value */
2361         tc_writel(0, &tr->DMA_Ctl);
2362         tc_writel(0, &tr->TxThrsh);
2363         tc_writel(0, &tr->TxPollCtr);
2364         tc_writel(0, &tr->RxFragSize);
2365         tc_writel(0, &tr->Int_En);
2366         tc_writel(0, &tr->FDA_Bas);
2367         tc_writel(0, &tr->FDA_Lim);
2368         tc_writel(0xffffffff, &tr->Int_Src);    /* Write 1 to clear */
2369         tc_writel(0, &tr->CAM_Ctl);
2370         tc_writel(0, &tr->Tx_Ctl);
2371         tc_writel(0, &tr->Rx_Ctl);
2372         tc_writel(0, &tr->CAM_Ena);
2373         (void)tc_readl(&tr->Miss_Cnt);  /* Read to clear */
2374
2375         /* initialize internal SRAM */
2376         tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2377         for (i = 0; i < 0x1000; i += 4) {
2378                 tc_writel(i, &tr->CAM_Adr);
2379                 tc_writel(0, &tr->CAM_Data);
2380         }
2381         tc_writel(0, &tr->DMA_Ctl);
2382 }
2383
2384 static void tc35815_chip_init(struct net_device *dev)
2385 {
2386         struct tc35815_local *lp = netdev_priv(dev);
2387         struct tc35815_regs __iomem *tr =
2388                 (struct tc35815_regs __iomem *)dev->base_addr;
2389         unsigned long txctl = TX_CTL_CMD;
2390
2391         /* load station address to CAM */
2392         tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2393
2394         /* Enable CAM (broadcast and unicast) */
2395         tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2396         tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2397
2398         /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2399         if (HAVE_DMA_RXALIGN(lp))
2400                 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2401         else
2402                 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2403 #ifdef TC35815_USE_PACKEDBUFFER
2404         tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize);   /* Packing */
2405 #else
2406         tc_writel(ETH_ZLEN, &tr->RxFragSize);
2407 #endif
2408         tc_writel(0, &tr->TxPollCtr);   /* Batch mode */
2409         tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2410         tc_writel(INT_EN_CMD, &tr->Int_En);
2411
2412         /* set queues */
2413         tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2414         tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2415                   &tr->FDA_Lim);
2416         /*
2417          * Activation method:
2418          * First, enable the MAC Transmitter and the DMA Receive circuits.
2419          * Then enable the DMA Transmitter and the MAC Receive circuits.
2420          */
2421         tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);      /* start DMA receiver */
2422         tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);     /* start MAC receiver */
2423
2424         /* start MAC transmitter */
2425 #ifndef NO_CHECK_CARRIER
2426         /* TX4939 does not have EnLCarr */
2427         if (lp->chiptype == TC35815_TX4939)
2428                 txctl &= ~Tx_EnLCarr;
2429 #ifdef WORKAROUND_LOSTCAR
2430         /* WORKAROUND: ignore LostCrS in full duplex operation */
2431         if (!lp->phy_dev || !lp->link || lp->duplex == DUPLEX_FULL)
2432                 txctl &= ~Tx_EnLCarr;
2433 #endif
2434 #endif /* !NO_CHECK_CARRIER */
2435 #ifdef GATHER_TXINT
2436         txctl &= ~Tx_EnComp;    /* disable global tx completion int. */
2437 #endif
2438         tc_writel(txctl, &tr->Tx_Ctl);
2439 }
2440
2441 #ifdef CONFIG_PM
2442 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2443 {
2444         struct net_device *dev = pci_get_drvdata(pdev);
2445         struct tc35815_local *lp = netdev_priv(dev);
2446         unsigned long flags;
2447
2448         pci_save_state(pdev);
2449         if (!netif_running(dev))
2450                 return 0;
2451         netif_device_detach(dev);
2452         if (lp->phy_dev)
2453                 phy_stop(lp->phy_dev);
2454         spin_lock_irqsave(&lp->lock, flags);
2455         tc35815_chip_reset(dev);
2456         spin_unlock_irqrestore(&lp->lock, flags);
2457         pci_set_power_state(pdev, PCI_D3hot);
2458         return 0;
2459 }
2460
2461 static int tc35815_resume(struct pci_dev *pdev)
2462 {
2463         struct net_device *dev = pci_get_drvdata(pdev);
2464         struct tc35815_local *lp = netdev_priv(dev);
2465
2466         pci_restore_state(pdev);
2467         if (!netif_running(dev))
2468                 return 0;
2469         pci_set_power_state(pdev, PCI_D0);
2470         tc35815_restart(dev);
2471         netif_carrier_off(dev);
2472         if (lp->phy_dev)
2473                 phy_start(lp->phy_dev);
2474         netif_device_attach(dev);
2475         return 0;
2476 }
2477 #endif /* CONFIG_PM */
2478
2479 static struct pci_driver tc35815_pci_driver = {
2480         .name           = MODNAME,
2481         .id_table       = tc35815_pci_tbl,
2482         .probe          = tc35815_init_one,
2483         .remove         = __devexit_p(tc35815_remove_one),
2484 #ifdef CONFIG_PM
2485         .suspend        = tc35815_suspend,
2486         .resume         = tc35815_resume,
2487 #endif
2488 };
2489
2490 module_param_named(speed, options.speed, int, 0);
2491 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2492 module_param_named(duplex, options.duplex, int, 0);
2493 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2494
2495 static int __init tc35815_init_module(void)
2496 {
2497         return pci_register_driver(&tc35815_pci_driver);
2498 }
2499
2500 static void __exit tc35815_cleanup_module(void)
2501 {
2502         pci_unregister_driver(&tc35815_pci_driver);
2503 }
2504
2505 module_init(tc35815_init_module);
2506 module_exit(tc35815_cleanup_module);
2507
2508 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2509 MODULE_LICENSE("GPL");