git.oblomov.eu Git - linux-2.6/blob - 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/slab.h>
  41 #include <linux/string.h>
  42 #include <linux/spinlock.h>
  43 #include <linux/errno.h>
  44 #include <linux/init.h>
  45 #include <linux/netdevice.h>
  46 #include <linux/etherdevice.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/delay.h>
  49 #include <linux/pci.h>
  50 #include <linux/phy.h>
  51 #include <linux/workqueue.h>
  52 #include <linux/platform_device.h>
  53 #include <asm/io.h>
  54 #include <asm/byteorder.h>
  55
  56 /* First, a few definitions that the brave might change. */
  57
  58 #define GATHER_TXINT    /* On-Demand Tx Interrupt */
  59 #define WORKAROUND_LOSTCAR
  60 #define WORKAROUND_100HALF_PROMISC
  61 /* #define TC35815_USE_PACKEDBUFFER */
  62
  63 enum tc35815_chiptype {
  64         TC35815CF = 0,
  65         TC35815_NWU,
  66         TC35815_TX4939,
  67 };
  68
  69 /* indexed by tc35815_chiptype, above */
  70 static const struct {
  71         const char *name;
  72 } chip_info[] __devinitdata = {
  73         { "TOSHIBA TC35815CF 10/100BaseTX" },
  74         { "TOSHIBA TC35815 with Wake on LAN" },
  75         { "TOSHIBA TC35815/TX4939" },
  76 };
  77
  78 static const struct pci_device_id tc35815_pci_tbl[] = {
  79         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
  80         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
  81         {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
  82         {0,}
  83 };
  84 MODULE_DEVICE_TABLE(pci, tc35815_pci_tbl);
  85
  86 /* see MODULE_PARM_DESC */
  87 static struct tc35815_options {
  88         int speed;
  89         int duplex;
  90 } options;
  91
  92 /*
  93  * Registers
  94  */
  95 struct tc35815_regs {
  96         __u32 DMA_Ctl;          /* 0x00 */
  97         __u32 TxFrmPtr;
  98         __u32 TxThrsh;
  99         __u32 TxPollCtr;
 100         __u32 BLFrmPtr;
 101         __u32 RxFragSize;
 102         __u32 Int_En;
 103         __u32 FDA_Bas;
 104         __u32 FDA_Lim;          /* 0x20 */
 105         __u32 Int_Src;
 106         __u32 unused0[2];
 107         __u32 PauseCnt;
 108         __u32 RemPauCnt;
 109         __u32 TxCtlFrmStat;
 110         __u32 unused1;
 111         __u32 MAC_Ctl;          /* 0x40 */
 112         __u32 CAM_Ctl;
 113         __u32 Tx_Ctl;
 114         __u32 Tx_Stat;
 115         __u32 Rx_Ctl;
 116         __u32 Rx_Stat;
 117         __u32 MD_Data;
 118         __u32 MD_CA;
 119         __u32 CAM_Adr;          /* 0x60 */
 120         __u32 CAM_Data;
 121         __u32 CAM_Ena;
 122         __u32 PROM_Ctl;
 123         __u32 PROM_Data;
 124         __u32 Algn_Cnt;
 125         __u32 CRC_Cnt;
 126         __u32 Miss_Cnt;
 127 };
 128
 129 /*
 130  * Bit assignments
 131  */
 132 /* DMA_Ctl bit asign ------------------------------------------------------- */
 133 #define DMA_RxAlign            0x00c00000 /* 1:Reception Alignment           */
 134 #define DMA_RxAlign_1          0x00400000
 135 #define DMA_RxAlign_2          0x00800000
 136 #define DMA_RxAlign_3          0x00c00000
 137 #define DMA_M66EnStat          0x00080000 /* 1:66MHz Enable State            */
 138 #define DMA_IntMask            0x00040000 /* 1:Interupt mask                 */
 139 #define DMA_SWIntReq           0x00020000 /* 1:Software Interrupt request    */
 140 #define DMA_TxWakeUp           0x00010000 /* 1:Transmit Wake Up              */
 141 #define DMA_RxBigE             0x00008000 /* 1:Receive Big Endian            */
 142 #define DMA_TxBigE             0x00004000 /* 1:Transmit Big Endian           */
 143 #define DMA_TestMode           0x00002000 /* 1:Test Mode                     */
 144 #define DMA_PowrMgmnt          0x00001000 /* 1:Power Management              */
 145 #define DMA_DmBurst_Mask       0x000001fc /* DMA Burst size                  */
 146
 147 /* RxFragSize bit asign ---------------------------------------------------- */
 148 #define RxFrag_EnPack          0x00008000 /* 1:Enable Packing                */
 149 #define RxFrag_MinFragMask     0x00000ffc /* Minimum Fragment                */
 150
 151 /* MAC_Ctl bit asign ------------------------------------------------------- */
 152 #define MAC_Link10             0x00008000 /* 1:Link Status 10Mbits           */
 153 #define MAC_EnMissRoll         0x00002000 /* 1:Enable Missed Roll            */
 154 #define MAC_MissRoll           0x00000400 /* 1:Missed Roll                   */
 155 #define MAC_Loop10             0x00000080 /* 1:Loop 10 Mbps                  */
 156 #define MAC_Conn_Auto          0x00000000 /*00:Connection mode (Automatic)   */
 157 #define MAC_Conn_10M           0x00000020 /*01:                (10Mbps endec)*/
 158 #define MAC_Conn_Mll           0x00000040 /*10:                (Mll clock)   */
 159 #define MAC_MacLoop            0x00000010 /* 1:MAC Loopback                  */
 160 #define MAC_FullDup            0x00000008 /* 1:Full Duplex 0:Half Duplex     */
 161 #define MAC_Reset              0x00000004 /* 1:Software Reset                */
 162 #define MAC_HaltImm            0x00000002 /* 1:Halt Immediate                */
 163 #define MAC_HaltReq            0x00000001 /* 1:Halt request                  */
 164
 165 /* PROM_Ctl bit asign ------------------------------------------------------ */
 166 #define PROM_Busy              0x00008000 /* 1:Busy (Start Operation)        */
 167 #define PROM_Read              0x00004000 /*10:Read operation                */
 168 #define PROM_Write             0x00002000 /*01:Write operation               */
 169 #define PROM_Erase             0x00006000 /*11:Erase operation               */
 170                                           /*00:Enable or Disable Writting,   */
 171                                           /*      as specified in PROM_Addr. */
 172 #define PROM_Addr_Ena          0x00000030 /*11xxxx:PROM Write enable         */
 173                                           /*00xxxx:           disable        */
 174
 175 /* CAM_Ctl bit asign ------------------------------------------------------- */
 176 #define CAM_CompEn             0x00000010 /* 1:CAM Compare Enable            */
 177 #define CAM_NegCAM             0x00000008 /* 1:Reject packets CAM recognizes,*/
 178                                           /*                    accept other */
 179 #define CAM_BroadAcc           0x00000004 /* 1:Broadcast assept              */
 180 #define CAM_GroupAcc           0x00000002 /* 1:Multicast assept              */
 181 #define CAM_StationAcc         0x00000001 /* 1:unicast accept                */
 182
 183 /* CAM_Ena bit asign ------------------------------------------------------- */
 184 #define CAM_ENTRY_MAX                  21   /* CAM Data entry max count      */
 185 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits)  */
 186 #define CAM_Ena_Bit(index)      (1 << (index))
 187 #define CAM_ENTRY_DESTINATION   0
 188 #define CAM_ENTRY_SOURCE        1
 189 #define CAM_ENTRY_MACCTL        20
 190
 191 /* Tx_Ctl bit asign -------------------------------------------------------- */
 192 #define Tx_En                  0x00000001 /* 1:Transmit enable               */
 193 #define Tx_TxHalt              0x00000002 /* 1:Transmit Halt Request         */
 194 #define Tx_NoPad               0x00000004 /* 1:Suppress Padding              */
 195 #define Tx_NoCRC               0x00000008 /* 1:Suppress Padding              */
 196 #define Tx_FBack               0x00000010 /* 1:Fast Back-off                 */
 197 #define Tx_EnUnder             0x00000100 /* 1:Enable Underrun               */
 198 #define Tx_EnExDefer           0x00000200 /* 1:Enable Excessive Deferral     */
 199 #define Tx_EnLCarr             0x00000400 /* 1:Enable Lost Carrier           */
 200 #define Tx_EnExColl            0x00000800 /* 1:Enable Excessive Collision    */
 201 #define Tx_EnLateColl          0x00001000 /* 1:Enable Late Collision         */
 202 #define Tx_EnTxPar             0x00002000 /* 1:Enable Transmit Parity        */
 203 #define Tx_EnComp              0x00004000 /* 1:Enable Completion             */
 204
 205 /* Tx_Stat bit asign ------------------------------------------------------- */
 206 #define Tx_TxColl_MASK         0x0000000F /* Tx Collision Count              */
 207 #define Tx_ExColl              0x00000010 /* Excessive Collision             */
 208 #define Tx_TXDefer             0x00000020 /* Transmit Defered                */
 209 #define Tx_Paused              0x00000040 /* Transmit Paused                 */
 210 #define Tx_IntTx               0x00000080 /* Interrupt on Tx                 */
 211 #define Tx_Under               0x00000100 /* Underrun                        */
 212 #define Tx_Defer               0x00000200 /* Deferral                        */
 213 #define Tx_NCarr               0x00000400 /* No Carrier                      */
 214 #define Tx_10Stat              0x00000800 /* 10Mbps Status                   */
 215 #define Tx_LateColl            0x00001000 /* Late Collision                  */
 216 #define Tx_TxPar               0x00002000 /* Tx Parity Error                 */
 217 #define Tx_Comp                0x00004000 /* Completion                      */
 218 #define Tx_Halted              0x00008000 /* Tx Halted                       */
 219 #define Tx_SQErr               0x00010000 /* Signal Quality Error(SQE)       */
 220
 221 /* Rx_Ctl bit asign -------------------------------------------------------- */
 222 #define Rx_EnGood              0x00004000 /* 1:Enable Good                   */
 223 #define Rx_EnRxPar             0x00002000 /* 1:Enable Receive Parity         */
 224 #define Rx_EnLongErr           0x00000800 /* 1:Enable Long Error             */
 225 #define Rx_EnOver              0x00000400 /* 1:Enable OverFlow               */
 226 #define Rx_EnCRCErr            0x00000200 /* 1:Enable CRC Error              */
 227 #define Rx_EnAlign             0x00000100 /* 1:Enable Alignment              */
 228 #define Rx_IgnoreCRC           0x00000040 /* 1:Ignore CRC Value              */
 229 #define Rx_StripCRC            0x00000010 /* 1:Strip CRC Value               */
 230 #define Rx_ShortEn             0x00000008 /* 1:Short Enable                  */
 231 #define Rx_LongEn              0x00000004 /* 1:Long Enable                   */
 232 #define Rx_RxHalt              0x00000002 /* 1:Receive Halt Request          */
 233 #define Rx_RxEn                0x00000001 /* 1:Receive Intrrupt Enable       */
 234
 235 /* Rx_Stat bit asign ------------------------------------------------------- */
 236 #define Rx_Halted              0x00008000 /* Rx Halted                       */
 237 #define Rx_Good                0x00004000 /* Rx Good                         */
 238 #define Rx_RxPar               0x00002000 /* Rx Parity Error                 */
 239 #define Rx_TypePkt             0x00001000 /* Rx Type Packet                  */
 240 #define Rx_LongErr             0x00000800 /* Rx Long Error                   */
 241 #define Rx_Over                0x00000400 /* Rx Overflow                     */
 242 #define Rx_CRCErr              0x00000200 /* Rx CRC Error                    */
 243 #define Rx_Align               0x00000100 /* Rx Alignment Error              */
 244 #define Rx_10Stat              0x00000080 /* Rx 10Mbps Status                */
 245 #define Rx_IntRx               0x00000040 /* Rx Interrupt                    */
 246 #define Rx_CtlRecd             0x00000020 /* Rx Control Receive              */
 247 #define Rx_InLenErr            0x00000010 /* Rx In Range Frame Length Error  */
 248
 249 #define Rx_Stat_Mask           0x0000FFF0 /* Rx All Status Mask              */
 250
 251 /* Int_En bit asign -------------------------------------------------------- */
 252 #define Int_NRAbtEn            0x00000800 /* 1:Non-recoverable Abort Enable  */
 253 #define Int_TxCtlCmpEn         0x00000400 /* 1:Transmit Ctl Complete Enable  */
 254 #define Int_DmParErrEn         0x00000200 /* 1:DMA Parity Error Enable       */
 255 #define Int_DParDEn            0x00000100 /* 1:Data Parity Error Enable      */
 256 #define Int_EarNotEn           0x00000080 /* 1:Early Notify Enable           */
 257 #define Int_DParErrEn          0x00000040 /* 1:Detected Parity Error Enable  */
 258 #define Int_SSysErrEn          0x00000020 /* 1:Signalled System Error Enable */
 259 #define Int_RMasAbtEn          0x00000010 /* 1:Received Master Abort Enable  */
 260 #define Int_RTargAbtEn         0x00000008 /* 1:Received Target Abort Enable  */
 261 #define Int_STargAbtEn         0x00000004 /* 1:Signalled Target Abort Enable */
 262 #define Int_BLExEn             0x00000002 /* 1:Buffer List Exhausted Enable  */
 263 #define Int_FDAExEn            0x00000001 /* 1:Free Descriptor Area          */
 264                                           /*               Exhausted Enable  */
 265
 266 /* Int_Src bit asign ------------------------------------------------------- */
 267 #define Int_NRabt              0x00004000 /* 1:Non Recoverable error         */
 268 #define Int_DmParErrStat       0x00002000 /* 1:DMA Parity Error & Clear      */
 269 #define Int_BLEx               0x00001000 /* 1:Buffer List Empty & Clear     */
 270 #define Int_FDAEx              0x00000800 /* 1:FDA Empty & Clear             */
 271 #define Int_IntNRAbt           0x00000400 /* 1:Non Recoverable Abort         */
 272 #define Int_IntCmp             0x00000200 /* 1:MAC control packet complete   */
 273 #define Int_IntExBD            0x00000100 /* 1:Interrupt Extra BD & Clear    */
 274 #define Int_DmParErr           0x00000080 /* 1:DMA Parity Error & Clear      */
 275 #define Int_IntEarNot          0x00000040 /* 1:Receive Data write & Clear    */
 276 #define Int_SWInt              0x00000020 /* 1:Software request & Clear      */
 277 #define Int_IntBLEx            0x00000010 /* 1:Buffer List Empty & Clear     */
 278 #define Int_IntFDAEx           0x00000008 /* 1:FDA Empty & Clear             */
 279 #define Int_IntPCI             0x00000004 /* 1:PCI controller & Clear        */
 280 #define Int_IntMacRx           0x00000002 /* 1:Rx controller & Clear         */
 281 #define Int_IntMacTx           0x00000001 /* 1:Tx controller & Clear         */
 282
 283 /* MD_CA bit asign --------------------------------------------------------- */
 284 #define MD_CA_PreSup           0x00001000 /* 1:Preamble Supress              */
 285 #define MD_CA_Busy             0x00000800 /* 1:Busy (Start Operation)        */
 286 #define MD_CA_Wr               0x00000400 /* 1:Write 0:Read                  */
 287
 288
 289 /*
 290  * Descriptors
 291  */
 292
 293 /* Frame descripter */
 294 struct FDesc {
 295         volatile __u32 FDNext;
 296         volatile __u32 FDSystem;
 297         volatile __u32 FDStat;
 298         volatile __u32 FDCtl;
 299 };
 300
 301 /* Buffer descripter */
 302 struct BDesc {
 303         volatile __u32 BuffData;
 304         volatile __u32 BDCtl;
 305 };
 306
 307 #define FD_ALIGN        16
 308
 309 /* Frame Descripter bit asign ---------------------------------------------- */
 310 #define FD_FDLength_MASK       0x0000FFFF /* Length MASK                     */
 311 #define FD_BDCnt_MASK          0x001F0000 /* BD count MASK in FD             */
 312 #define FD_FrmOpt_MASK         0x7C000000 /* Frame option MASK               */
 313 #define FD_FrmOpt_BigEndian    0x40000000 /* Tx/Rx */
 314 #define FD_FrmOpt_IntTx        0x20000000 /* Tx only */
 315 #define FD_FrmOpt_NoCRC        0x10000000 /* Tx only */
 316 #define FD_FrmOpt_NoPadding    0x08000000 /* Tx only */
 317 #define FD_FrmOpt_Packing      0x04000000 /* Rx only */
 318 #define FD_CownsFD             0x80000000 /* FD Controller owner bit         */
 319 #define FD_Next_EOL            0x00000001 /* FD EOL indicator                */
 320 #define FD_BDCnt_SHIFT         16
 321
 322 /* Buffer Descripter bit asign --------------------------------------------- */
 323 #define BD_BuffLength_MASK     0x0000FFFF /* Recieve Data Size               */
 324 #define BD_RxBDID_MASK         0x00FF0000 /* BD ID Number MASK               */
 325 #define BD_RxBDSeqN_MASK       0x7F000000 /* Rx BD Sequence Number           */
 326 #define BD_CownsBD             0x80000000 /* BD Controller owner bit         */
 327 #define BD_RxBDID_SHIFT        16
 328 #define BD_RxBDSeqN_SHIFT      24
 329
 330
 331 /* Some useful constants. */
 332 #undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
 333
 334 #ifdef NO_CHECK_CARRIER
 335 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 336         Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
 337         Tx_En)  /* maybe  0x7b01 */
 338 #else
 339 #define TX_CTL_CMD      (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
 340         Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
 341         Tx_En)  /* maybe  0x7b01 */
 342 #endif
 343 #define RX_CTL_CMD      (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
 344         | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn)   /* maybe 0x6f01 */
 345 #define INT_EN_CMD  (Int_NRAbtEn | \
 346         Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
 347         Int_SSysErrEn  | Int_RMasAbtEn | Int_RTargAbtEn | \
 348         Int_STargAbtEn | \
 349         Int_BLExEn  | Int_FDAExEn) /* maybe 0xb7f*/
 350 #define DMA_CTL_CMD     DMA_BURST_SIZE
 351 #define HAVE_DMA_RXALIGN(lp)    likely((lp)->chiptype != TC35815CF)
 352
 353 /* Tuning parameters */
 354 #define DMA_BURST_SIZE  32
 355 #define TX_THRESHOLD    1024
 356 /* used threshold with packet max byte for low pci transfer ability.*/
 357 #define TX_THRESHOLD_MAX 1536
 358 /* setting threshold max value when overrun error occured this count. */
 359 #define TX_THRESHOLD_KEEP_LIMIT 10
 360
 361 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
 362 #ifdef TC35815_USE_PACKEDBUFFER
 363 #define FD_PAGE_NUM 2
 364 #define RX_BUF_NUM      8       /* >= 2 */
 365 #define RX_FD_NUM       250     /* >= 32 */
 366 #define TX_FD_NUM       128
 367 #define RX_BUF_SIZE     PAGE_SIZE
 368 #else /* TC35815_USE_PACKEDBUFFER */
 369 #define FD_PAGE_NUM 4
 370 #define RX_BUF_NUM      128     /* < 256 */
 371 #define RX_FD_NUM       256     /* >= 32 */
 372 #define TX_FD_NUM       128
 373 #if RX_CTL_CMD & Rx_LongEn
 374 #define RX_BUF_SIZE     PAGE_SIZE
 375 #elif RX_CTL_CMD & Rx_StripCRC
 376 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 4 + 2, 32) /* +2: reserve */
 377 #else
 378 #define RX_BUF_SIZE     ALIGN(ETH_FRAME_LEN + 2, 32) /* +2: reserve */
 379 #endif
 380 #endif /* TC35815_USE_PACKEDBUFFER */
 381 #define RX_FD_RESERVE   (2 / 2) /* max 2 BD per RxFD */
 382 #define NAPI_WEIGHT     16
 383
 384 struct TxFD {
 385         struct FDesc fd;
 386         struct BDesc bd;
 387         struct BDesc unused;
 388 };
 389
 390 struct RxFD {
 391         struct FDesc fd;
 392         struct BDesc bd[0];     /* variable length */
 393 };
 394
 395 struct FrFD {
 396         struct FDesc fd;
 397         struct BDesc bd[RX_BUF_NUM];
 398 };
 399
 400
 401 #define tc_readl(addr)  ioread32(addr)
 402 #define tc_writel(d, addr)      iowrite32(d, addr)
 403
 404 #define TC35815_TX_TIMEOUT  msecs_to_jiffies(400)
 405
 406 /* Information that need to be kept for each controller. */
 407 struct tc35815_local {
 408         struct pci_dev *pci_dev;
 409
 410         struct net_device *dev;
 411         struct napi_struct napi;
 412
 413         /* statistics */
 414         struct {
 415                 int max_tx_qlen;
 416                 int tx_ints;
 417                 int rx_ints;
 418                 int tx_underrun;
 419         } lstats;
 420
 421         /* Tx control lock.  This protects the transmit buffer ring
 422          * state along with the "tx full" state of the driver.  This
 423          * means all netif_queue flow control actions are protected
 424          * by this lock as well.
 425          */
 426         spinlock_t lock;
 427
 428         struct mii_bus *mii_bus;
 429         struct phy_device *phy_dev;
 430         int duplex;
 431         int speed;
 432         int link;
 433         struct work_struct restart_work;
 434
 435         /*
 436          * Transmitting: Batch Mode.
 437          *      1 BD in 1 TxFD.
 438          * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
 439          *      1 circular FD for Free Buffer List.
 440          *      RX_BUF_NUM BD in Free Buffer FD.
 441          *      One Free Buffer BD has PAGE_SIZE data buffer.
 442          * Or Non-Packing Mode.
 443          *      1 circular FD for Free Buffer List.
 444          *      RX_BUF_NUM BD in Free Buffer FD.
 445          *      One Free Buffer BD has ETH_FRAME_LEN data buffer.
 446          */
 447         void *fd_buf;   /* for TxFD, RxFD, FrFD */
 448         dma_addr_t fd_buf_dma;
 449         struct TxFD *tfd_base;
 450         unsigned int tfd_start;
 451         unsigned int tfd_end;
 452         struct RxFD *rfd_base;
 453         struct RxFD *rfd_limit;
 454         struct RxFD *rfd_cur;
 455         struct FrFD *fbl_ptr;
 456 #ifdef TC35815_USE_PACKEDBUFFER
 457         unsigned char fbl_curid;
 458         void *data_buf[RX_BUF_NUM];             /* packing */
 459         dma_addr_t data_buf_dma[RX_BUF_NUM];
 460         struct {
 461                 struct sk_buff *skb;
 462                 dma_addr_t skb_dma;
 463         } tx_skbs[TX_FD_NUM];
 464 #else
 465         unsigned int fbl_count;
 466         struct {
 467                 struct sk_buff *skb;
 468                 dma_addr_t skb_dma;
 469         } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
 470 #endif
 471         u32 msg_enable;
 472         enum tc35815_chiptype chiptype;
 473 };
 474
 475 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
 476 {
 477         return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
 478 }
 479 #ifdef DEBUG
 480 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 481 {
 482         return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
 483 }
 484 #endif
 485 #ifdef TC35815_USE_PACKEDBUFFER
 486 static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
 487 {
 488         int i;
 489         for (i = 0; i < RX_BUF_NUM; i++) {
 490                 if (bus >= lp->data_buf_dma[i] &&
 491                     bus < lp->data_buf_dma[i] + PAGE_SIZE)
 492                         return (void *)((u8 *)lp->data_buf[i] +
 493                                         (bus - lp->data_buf_dma[i]));
 494         }
 495         return NULL;
 496 }
 497
 498 #define TC35815_DMA_SYNC_ONDEMAND
 499 static void *alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
 500 {
 501 #ifdef TC35815_DMA_SYNC_ONDEMAND
 502         void *buf;
 503         /* pci_map + pci_dma_sync will be more effective than
 504          * pci_alloc_consistent on some archs. */
 505         buf = (void *)__get_free_page(GFP_ATOMIC);
 506         if (!buf)
 507                 return NULL;
 508         *dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
 509                                      PCI_DMA_FROMDEVICE);
 510         if (pci_dma_mapping_error(hwdev, *dma_handle)) {
 511                 free_page((unsigned long)buf);
 512                 return NULL;
 513         }
 514         return buf;
 515 #else
 516         return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
 517 #endif
 518 }
 519
 520 static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
 521 {
 522 #ifdef TC35815_DMA_SYNC_ONDEMAND
 523         pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 524         free_page((unsigned long)buf);
 525 #else
 526         pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
 527 #endif
 528 }
 529 #else /* TC35815_USE_PACKEDBUFFER */
 530 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
 531                                        struct pci_dev *hwdev,
 532                                        dma_addr_t *dma_handle)
 533 {
 534         struct sk_buff *skb;
 535         skb = dev_alloc_skb(RX_BUF_SIZE);
 536         if (!skb)
 537                 return NULL;
 538         *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
 539                                      PCI_DMA_FROMDEVICE);
 540         if (pci_dma_mapping_error(hwdev, *dma_handle)) {
 541                 dev_kfree_skb_any(skb);
 542                 return NULL;
 543         }
 544         skb_reserve(skb, 2);    /* make IP header 4byte aligned */
 545         return skb;
 546 }
 547
 548 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
 549 {
 550         pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
 551                          PCI_DMA_FROMDEVICE);
 552         dev_kfree_skb_any(skb);
 553 }
 554 #endif /* TC35815_USE_PACKEDBUFFER */
 555
 556 /* Index to functions, as function prototypes. */
 557
 558 static int      tc35815_open(struct net_device *dev);
 559 static int      tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
 560 static irqreturn_t      tc35815_interrupt(int irq, void *dev_id);
 561 #ifdef TC35815_NAPI
 562 static int      tc35815_rx(struct net_device *dev, int limit);
 563 static int      tc35815_poll(struct napi_struct *napi, int budget);
 564 #else
 565 static void     tc35815_rx(struct net_device *dev);
 566 #endif
 567 static void     tc35815_txdone(struct net_device *dev);
 568 static int      tc35815_close(struct net_device *dev);
 569 static struct   net_device_stats *tc35815_get_stats(struct net_device *dev);
 570 static void     tc35815_set_multicast_list(struct net_device *dev);
 571 static void     tc35815_tx_timeout(struct net_device *dev);
 572 static int      tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 573 #ifdef CONFIG_NET_POLL_CONTROLLER
 574 static void     tc35815_poll_controller(struct net_device *dev);
 575 #endif
 576 static const struct ethtool_ops tc35815_ethtool_ops;
 577
 578 /* Example routines you must write ;->. */
 579 static void     tc35815_chip_reset(struct net_device *dev);
 580 static void     tc35815_chip_init(struct net_device *dev);
 581
 582 #ifdef DEBUG
 583 static void     panic_queues(struct net_device *dev);
 584 #endif
 585
 586 static void tc35815_restart_work(struct work_struct *work);
 587
 588 static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
 589 {
 590         struct net_device *dev = bus->priv;
 591         struct tc35815_regs __iomem *tr =
 592                 (struct tc35815_regs __iomem *)dev->base_addr;
 593         unsigned long timeout = jiffies + 10;
 594
 595         tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA);
 596         while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
 597                 if (time_after(jiffies, timeout))
 598                         return -EIO;
 599                 cpu_relax();
 600         }
 601         return tc_readl(&tr->MD_Data) & 0xffff;
 602 }
 603
 604 static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val)
 605 {
 606         struct net_device *dev = bus->priv;
 607         struct tc35815_regs __iomem *tr =
 608                 (struct tc35815_regs __iomem *)dev->base_addr;
 609         unsigned long timeout = jiffies + 10;
 610
 611         tc_writel(val, &tr->MD_Data);
 612         tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f),
 613                   &tr->MD_CA);
 614         while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
 615                 if (time_after(jiffies, timeout))
 616                         return -EIO;
 617                 cpu_relax();
 618         }
 619         return 0;
 620 }
 621
 622 static void tc_handle_link_change(struct net_device *dev)
 623 {
 624         struct tc35815_local *lp = netdev_priv(dev);
 625         struct phy_device *phydev = lp->phy_dev;
 626         unsigned long flags;
 627         int status_change = 0;
 628
 629         spin_lock_irqsave(&lp->lock, flags);
 630         if (phydev->link &&
 631             (lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
 632                 struct tc35815_regs __iomem *tr =
 633                         (struct tc35815_regs __iomem *)dev->base_addr;
 634                 u32 reg;
 635
 636                 reg = tc_readl(&tr->MAC_Ctl);
 637                 reg |= MAC_HaltReq;
 638                 tc_writel(reg, &tr->MAC_Ctl);
 639                 if (phydev->duplex == DUPLEX_FULL)
 640                         reg |= MAC_FullDup;
 641                 else
 642                         reg &= ~MAC_FullDup;
 643                 tc_writel(reg, &tr->MAC_Ctl);
 644                 reg &= ~MAC_HaltReq;
 645                 tc_writel(reg, &tr->MAC_Ctl);
 646
 647                 /*
 648                  * TX4939 PCFG.SPEEDn bit will be changed on
 649                  * NETDEV_CHANGE event.
 650                  */
 651
 652 #if !defined(NO_CHECK_CARRIER) && defined(WORKAROUND_LOSTCAR)
 653                 /*
 654                  * WORKAROUND: enable LostCrS only if half duplex
 655                  * operation.
 656                  * (TX4939 does not have EnLCarr)
 657                  */
 658                 if (phydev->duplex == DUPLEX_HALF &&
 659                     lp->chiptype != TC35815_TX4939)
 660                         tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
 661                                   &tr->Tx_Ctl);
 662 #endif
 663
 664                 lp->speed = phydev->speed;
 665                 lp->duplex = phydev->duplex;
 666                 status_change = 1;
 667         }
 668
 669         if (phydev->link != lp->link) {
 670                 if (phydev->link) {
 671 #ifdef WORKAROUND_100HALF_PROMISC
 672                         /* delayed promiscuous enabling */
 673                         if (dev->flags & IFF_PROMISC)
 674                                 tc35815_set_multicast_list(dev);
 675 #endif
 676                 } else {
 677                         lp->speed = 0;
 678                         lp->duplex = -1;
 679                 }
 680                 lp->link = phydev->link;
 681
 682                 status_change = 1;
 683         }
 684         spin_unlock_irqrestore(&lp->lock, flags);
 685
 686         if (status_change && netif_msg_link(lp)) {
 687                 phy_print_status(phydev);
 688 #ifdef DEBUG
 689                 printk(KERN_DEBUG
 690                        "%s: MII BMCR %04x BMSR %04x LPA %04x\n",
 691                        dev->name,
 692                        phy_read(phydev, MII_BMCR),
 693                        phy_read(phydev, MII_BMSR),
 694                        phy_read(phydev, MII_LPA));
 695 #endif
 696         }
 697 }
 698
 699 static int tc_mii_probe(struct net_device *dev)
 700 {
 701         struct tc35815_local *lp = netdev_priv(dev);
 702         struct phy_device *phydev = NULL;
 703         int phy_addr;
 704         u32 dropmask;
 705
 706         /* find the first phy */
 707         for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
 708                 if (lp->mii_bus->phy_map[phy_addr]) {
 709                         if (phydev) {
 710                                 printk(KERN_ERR "%s: multiple PHYs found\n",
 711                                        dev->name);
 712                                 return -EINVAL;
 713                         }
 714                         phydev = lp->mii_bus->phy_map[phy_addr];
 715                         break;
 716                 }
 717         }
 718
 719         if (!phydev) {
 720                 printk(KERN_ERR "%s: no PHY found\n", dev->name);
 721                 return -ENODEV;
 722         }
 723
 724         /* attach the mac to the phy */
 725         phydev = phy_connect(dev, phydev->dev.bus_id,
 726                              &tc_handle_link_change, 0,
 727                              lp->chiptype == TC35815_TX4939 ?
 728                              PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII);
 729         if (IS_ERR(phydev)) {
 730                 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
 731                 return PTR_ERR(phydev);
 732         }
 733         printk(KERN_INFO "%s: attached PHY driver [%s] "
 734                 "(mii_bus:phy_addr=%s, id=%x)\n",
 735                 dev->name, phydev->drv->name, phydev->dev.bus_id,
 736                 phydev->phy_id);
 737
 738         /* mask with MAC supported features */
 739         phydev->supported &= PHY_BASIC_FEATURES;
 740         dropmask = 0;
 741         if (options.speed == 10)
 742                 dropmask |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
 743         else if (options.speed == 100)
 744                 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
 745         if (options.duplex == 1)
 746                 dropmask |= SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full;
 747         else if (options.duplex == 2)
 748                 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_100baseT_Half;
 749         phydev->supported &= ~dropmask;
 750         phydev->advertising = phydev->supported;
 751
 752         lp->link = 0;
 753         lp->speed = 0;
 754         lp->duplex = -1;
 755         lp->phy_dev = phydev;
 756
 757         return 0;
 758 }
 759
 760 static int tc_mii_init(struct net_device *dev)
 761 {
 762         struct tc35815_local *lp = netdev_priv(dev);
 763         int err;
 764         int i;
 765
 766         lp->mii_bus = mdiobus_alloc();
 767         if (lp->mii_bus == NULL) {
 768                 err = -ENOMEM;
 769                 goto err_out;
 770         }
 771
 772         lp->mii_bus->name = "tc35815_mii_bus";
 773         lp->mii_bus->read = tc_mdio_read;
 774         lp->mii_bus->write = tc_mdio_write;
 775         snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x",
 776                  (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
 777         lp->mii_bus->priv = dev;
 778         lp->mii_bus->parent = &lp->pci_dev->dev;
 779         lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
 780         if (!lp->mii_bus->irq) {
 781                 err = -ENOMEM;
 782                 goto err_out_free_mii_bus;
 783         }
 784
 785         for (i = 0; i < PHY_MAX_ADDR; i++)
 786                 lp->mii_bus->irq[i] = PHY_POLL;
 787
 788         err = mdiobus_register(lp->mii_bus);
 789         if (err)
 790                 goto err_out_free_mdio_irq;
 791         err = tc_mii_probe(dev);
 792         if (err)
 793                 goto err_out_unregister_bus;
 794         return 0;
 795
 796 err_out_unregister_bus:
 797         mdiobus_unregister(lp->mii_bus);
 798 err_out_free_mdio_irq:
 799         kfree(lp->mii_bus->irq);
 800 err_out_free_mii_bus:
 801         mdiobus_free(lp->mii_bus);
 802 err_out:
 803         return err;
 804 }
 805
 806 #ifdef CONFIG_CPU_TX49XX
 807 /*
 808  * Find a platform_device providing a MAC address.  The platform code
 809  * should provide a "tc35815-mac" device with a MAC address in its
 810  * platform_data.
 811  */
 812 static int __devinit tc35815_mac_match(struct device *dev, void *data)
 813 {
 814         struct platform_device *plat_dev = to_platform_device(dev);
 815         struct pci_dev *pci_dev = data;
 816         unsigned int id = pci_dev->irq;
 817         return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
 818 }
 819
 820 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 821 {
 822         struct tc35815_local *lp = netdev_priv(dev);
 823         struct device *pd = bus_find_device(&platform_bus_type, NULL,
 824                                             lp->pci_dev, tc35815_mac_match);
 825         if (pd) {
 826                 if (pd->platform_data)
 827                         memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
 828                 put_device(pd);
 829                 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
 830         }
 831         return -ENODEV;
 832 }
 833 #else
 834 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
 835 {
 836         return -ENODEV;
 837 }
 838 #endif
 839
 840 static int __devinit tc35815_init_dev_addr(struct net_device *dev)
 841 {
 842         struct tc35815_regs __iomem *tr =
 843                 (struct tc35815_regs __iomem *)dev->base_addr;
 844         int i;
 845
 846         while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 847                 ;
 848         for (i = 0; i < 6; i += 2) {
 849                 unsigned short data;
 850                 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
 851                 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
 852                         ;
 853                 data = tc_readl(&tr->PROM_Data);
 854                 dev->dev_addr[i] = data & 0xff;
 855                 dev->dev_addr[i+1] = data >> 8;
 856         }
 857         if (!is_valid_ether_addr(dev->dev_addr))
 858                 return tc35815_read_plat_dev_addr(dev);
 859         return 0;
 860 }
 861
 862 static int __devinit tc35815_init_one(struct pci_dev *pdev,
 863                                       const struct pci_device_id *ent)
 864 {
 865         void __iomem *ioaddr = NULL;
 866         struct net_device *dev;
 867         struct tc35815_local *lp;
 868         int rc;
 869
 870         static int printed_version;
 871         if (!printed_version++) {
 872                 printk(version);
 873                 dev_printk(KERN_DEBUG, &pdev->dev,
 874                            "speed:%d duplex:%d\n",
 875                            options.speed, options.duplex);
 876         }
 877
 878         if (!pdev->irq) {
 879                 dev_warn(&pdev->dev, "no IRQ assigned.\n");
 880                 return -ENODEV;
 881         }
 882
 883         /* dev zeroed in alloc_etherdev */
 884         dev = alloc_etherdev(sizeof(*lp));
 885         if (dev == NULL) {
 886                 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
 887                 return -ENOMEM;
 888         }
 889         SET_NETDEV_DEV(dev, &pdev->dev);
 890         lp = netdev_priv(dev);
 891         lp->dev = dev;
 892
 893         /* enable device (incl. PCI PM wakeup), and bus-mastering */
 894         rc = pcim_enable_device(pdev);
 895         if (rc)
 896                 goto err_out;
 897         rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
 898         if (rc)
 899                 goto err_out;
 900         pci_set_master(pdev);
 901         ioaddr = pcim_iomap_table(pdev)[1];
 902
 903         /* Initialize the device structure. */
 904         dev->open = tc35815_open;
 905         dev->hard_start_xmit = tc35815_send_packet;
 906         dev->stop = tc35815_close;
 907         dev->get_stats = tc35815_get_stats;
 908         dev->set_multicast_list = tc35815_set_multicast_list;
 909         dev->do_ioctl = tc35815_ioctl;
 910         dev->ethtool_ops = &tc35815_ethtool_ops;
 911         dev->tx_timeout = tc35815_tx_timeout;
 912         dev->watchdog_timeo = TC35815_TX_TIMEOUT;
 913 #ifdef TC35815_NAPI
 914         netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
 915 #endif
 916 #ifdef CONFIG_NET_POLL_CONTROLLER
 917         dev->poll_controller = tc35815_poll_controller;
 918 #endif
 919
 920         dev->irq = pdev->irq;
 921         dev->base_addr = (unsigned long)ioaddr;
 922
 923         INIT_WORK(&lp->restart_work, tc35815_restart_work);
 924         spin_lock_init(&lp->lock);
 925         lp->pci_dev = pdev;
 926         lp->chiptype = ent->driver_data;
 927
 928         lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
 929         pci_set_drvdata(pdev, dev);
 930
 931         /* Soft reset the chip. */
 932         tc35815_chip_reset(dev);
 933
 934         /* Retrieve the ethernet address. */
 935         if (tc35815_init_dev_addr(dev)) {
 936                 dev_warn(&pdev->dev, "not valid ether addr\n");
 937                 random_ether_addr(dev->dev_addr);
 938         }
 939
 940         rc = register_netdev(dev);
 941         if (rc)
 942                 goto err_out;
 943
 944         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
 945         printk(KERN_INFO "%s: %s at 0x%lx, %pM, IRQ %d\n",
 946                 dev->name,
 947                 chip_info[ent->driver_data].name,
 948                 dev->base_addr,
 949                 dev->dev_addr,
 950                 dev->irq);
 951
 952         rc = tc_mii_init(dev);
 953         if (rc)
 954                 goto err_out_unregister;
 955
 956         return 0;
 957
 958 err_out_unregister:
 959         unregister_netdev(dev);
 960 err_out:
 961         free_netdev(dev);
 962         return rc;
 963 }
 964
 965
 966 static void __devexit tc35815_remove_one(struct pci_dev *pdev)
 967 {
 968         struct net_device *dev = pci_get_drvdata(pdev);
 969         struct tc35815_local *lp = netdev_priv(dev);
 970
 971         phy_disconnect(lp->phy_dev);
 972         mdiobus_unregister(lp->mii_bus);
 973         kfree(lp->mii_bus->irq);
 974         mdiobus_free(lp->mii_bus);
 975         unregister_netdev(dev);
 976         free_netdev(dev);
 977         pci_set_drvdata(pdev, NULL);
 978 }
 979
 980 static int
 981 tc35815_init_queues(struct net_device *dev)
 982 {
 983         struct tc35815_local *lp = netdev_priv(dev);
 984         int i;
 985         unsigned long fd_addr;
 986
 987         if (!lp->fd_buf) {
 988                 BUG_ON(sizeof(struct FDesc) +
 989                        sizeof(struct BDesc) * RX_BUF_NUM +
 990                        sizeof(struct FDesc) * RX_FD_NUM +
 991                        sizeof(struct TxFD) * TX_FD_NUM >
 992                        PAGE_SIZE * FD_PAGE_NUM);
 993
 994                 lp->fd_buf = pci_alloc_consistent(lp->pci_dev,
 995                                                   PAGE_SIZE * FD_PAGE_NUM,
 996                                                   &lp->fd_buf_dma);
 997                 if (!lp->fd_buf)
 998                         return -ENOMEM;
 999                 for (i = 0; i < RX_BUF_NUM; i++) {
1000 #ifdef TC35815_USE_PACKEDBUFFER
1001                         lp->data_buf[i] =
1002                                 alloc_rxbuf_page(lp->pci_dev,
1003                                                  &lp->data_buf_dma[i]);
1004                         if (!lp->data_buf[i]) {
1005                                 while (--i >= 0) {
1006                                         free_rxbuf_page(lp->pci_dev,
1007                                                         lp->data_buf[i],
1008                                                         lp->data_buf_dma[i]);
1009                                         lp->data_buf[i] = NULL;
1010                                 }
1011                                 pci_free_consistent(lp->pci_dev,
1012                                                     PAGE_SIZE * FD_PAGE_NUM,
1013                                                     lp->fd_buf,
1014                                                     lp->fd_buf_dma);
1015                                 lp->fd_buf = NULL;
1016                                 return -ENOMEM;
1017                         }
1018 #else
1019                         lp->rx_skbs[i].skb =
1020                                 alloc_rxbuf_skb(dev, lp->pci_dev,
1021                                                 &lp->rx_skbs[i].skb_dma);
1022                         if (!lp->rx_skbs[i].skb) {
1023                                 while (--i >= 0) {
1024                                         free_rxbuf_skb(lp->pci_dev,
1025                                                        lp->rx_skbs[i].skb,
1026                                                        lp->rx_skbs[i].skb_dma);
1027                                         lp->rx_skbs[i].skb = NULL;
1028                                 }
1029                                 pci_free_consistent(lp->pci_dev,
1030                                                     PAGE_SIZE * FD_PAGE_NUM,
1031                                                     lp->fd_buf,
1032                                                     lp->fd_buf_dma);
1033                                 lp->fd_buf = NULL;
1034                                 return -ENOMEM;
1035                         }
1036 #endif
1037                 }
1038                 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
1039                        dev->name, lp->fd_buf);
1040 #ifdef TC35815_USE_PACKEDBUFFER
1041                 printk(" DataBuf");
1042                 for (i = 0; i < RX_BUF_NUM; i++)
1043                         printk(" %p", lp->data_buf[i]);
1044 #endif
1045                 printk("\n");
1046         } else {
1047                 for (i = 0; i < FD_PAGE_NUM; i++)
1048                         clear_page((void *)((unsigned long)lp->fd_buf +
1049                                             i * PAGE_SIZE));
1050         }
1051         fd_addr = (unsigned long)lp->fd_buf;
1052
1053         /* Free Descriptors (for Receive) */
1054         lp->rfd_base = (struct RxFD *)fd_addr;
1055         fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
1056         for (i = 0; i < RX_FD_NUM; i++)
1057                 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
1058         lp->rfd_cur = lp->rfd_base;
1059         lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
1060
1061         /* Transmit Descriptors */
1062         lp->tfd_base = (struct TxFD *)fd_addr;
1063         fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
1064         for (i = 0; i < TX_FD_NUM; i++) {
1065                 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
1066                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1067                 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
1068         }
1069         lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
1070         lp->tfd_start = 0;
1071         lp->tfd_end = 0;
1072
1073         /* Buffer List (for Receive) */
1074         lp->fbl_ptr = (struct FrFD *)fd_addr;
1075         lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
1076         lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
1077 #ifndef TC35815_USE_PACKEDBUFFER
1078         /*
1079          * move all allocated skbs to head of rx_skbs[] array.
1080          * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
1081          * tc35815_rx() had failed.
1082          */
1083         lp->fbl_count = 0;
1084         for (i = 0; i < RX_BUF_NUM; i++) {
1085                 if (lp->rx_skbs[i].skb) {
1086                         if (i != lp->fbl_count) {
1087                                 lp->rx_skbs[lp->fbl_count].skb =
1088                                         lp->rx_skbs[i].skb;
1089                                 lp->rx_skbs[lp->fbl_count].skb_dma =
1090                                         lp->rx_skbs[i].skb_dma;
1091                         }
1092                         lp->fbl_count++;
1093                 }
1094         }
1095 #endif
1096         for (i = 0; i < RX_BUF_NUM; i++) {
1097 #ifdef TC35815_USE_PACKEDBUFFER
1098                 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
1099 #else
1100                 if (i >= lp->fbl_count) {
1101                         lp->fbl_ptr->bd[i].BuffData = 0;
1102                         lp->fbl_ptr->bd[i].BDCtl = 0;
1103                         continue;
1104                 }
1105                 lp->fbl_ptr->bd[i].BuffData =
1106                         cpu_to_le32(lp->rx_skbs[i].skb_dma);
1107 #endif
1108                 /* BDID is index of FrFD.bd[] */
1109                 lp->fbl_ptr->bd[i].BDCtl =
1110                         cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
1111                                     RX_BUF_SIZE);
1112         }
1113 #ifdef TC35815_USE_PACKEDBUFFER
1114         lp->fbl_curid = 0;
1115 #endif
1116
1117         printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
1118                dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
1119         return 0;
1120 }
1121
1122 static void
1123 tc35815_clear_queues(struct net_device *dev)
1124 {
1125         struct tc35815_local *lp = netdev_priv(dev);
1126         int i;
1127
1128         for (i = 0; i < TX_FD_NUM; i++) {
1129                 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1130                 struct sk_buff *skb =
1131                         fdsystem != 0xffffffff ?
1132                         lp->tx_skbs[fdsystem].skb : NULL;
1133 #ifdef DEBUG
1134                 if (lp->tx_skbs[i].skb != skb) {
1135                         printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1136                         panic_queues(dev);
1137                 }
1138 #else
1139                 BUG_ON(lp->tx_skbs[i].skb != skb);
1140 #endif
1141                 if (skb) {
1142                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1143                         lp->tx_skbs[i].skb = NULL;
1144                         lp->tx_skbs[i].skb_dma = 0;
1145                         dev_kfree_skb_any(skb);
1146                 }
1147                 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1148         }
1149
1150         tc35815_init_queues(dev);
1151 }
1152
1153 static void
1154 tc35815_free_queues(struct net_device *dev)
1155 {
1156         struct tc35815_local *lp = netdev_priv(dev);
1157         int i;
1158
1159         if (lp->tfd_base) {
1160                 for (i = 0; i < TX_FD_NUM; i++) {
1161                         u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1162                         struct sk_buff *skb =
1163                                 fdsystem != 0xffffffff ?
1164                                 lp->tx_skbs[fdsystem].skb : NULL;
1165 #ifdef DEBUG
1166                         if (lp->tx_skbs[i].skb != skb) {
1167                                 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1168                                 panic_queues(dev);
1169                         }
1170 #else
1171                         BUG_ON(lp->tx_skbs[i].skb != skb);
1172 #endif
1173                         if (skb) {
1174                                 dev_kfree_skb(skb);
1175                                 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1176                                 lp->tx_skbs[i].skb = NULL;
1177                                 lp->tx_skbs[i].skb_dma = 0;
1178                         }
1179                         lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1180                 }
1181         }
1182
1183         lp->rfd_base = NULL;
1184         lp->rfd_limit = NULL;
1185         lp->rfd_cur = NULL;
1186         lp->fbl_ptr = NULL;
1187
1188         for (i = 0; i < RX_BUF_NUM; i++) {
1189 #ifdef TC35815_USE_PACKEDBUFFER
1190                 if (lp->data_buf[i]) {
1191                         free_rxbuf_page(lp->pci_dev,
1192                                         lp->data_buf[i], lp->data_buf_dma[i]);
1193                         lp->data_buf[i] = NULL;
1194                 }
1195 #else
1196                 if (lp->rx_skbs[i].skb) {
1197                         free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1198                                        lp->rx_skbs[i].skb_dma);
1199                         lp->rx_skbs[i].skb = NULL;
1200                 }
1201 #endif
1202         }
1203         if (lp->fd_buf) {
1204                 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1205                                     lp->fd_buf, lp->fd_buf_dma);
1206                 lp->fd_buf = NULL;
1207         }
1208 }
1209
1210 static void
1211 dump_txfd(struct TxFD *fd)
1212 {
1213         printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1214                le32_to_cpu(fd->fd.FDNext),
1215                le32_to_cpu(fd->fd.FDSystem),
1216                le32_to_cpu(fd->fd.FDStat),
1217                le32_to_cpu(fd->fd.FDCtl));
1218         printk("BD: ");
1219         printk(" %08x %08x",
1220                le32_to_cpu(fd->bd.BuffData),
1221                le32_to_cpu(fd->bd.BDCtl));
1222         printk("\n");
1223 }
1224
1225 static int
1226 dump_rxfd(struct RxFD *fd)
1227 {
1228         int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1229         if (bd_count > 8)
1230                 bd_count = 8;
1231         printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1232                le32_to_cpu(fd->fd.FDNext),
1233                le32_to_cpu(fd->fd.FDSystem),
1234                le32_to_cpu(fd->fd.FDStat),
1235                le32_to_cpu(fd->fd.FDCtl));
1236         if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1237                 return 0;
1238         printk("BD: ");
1239         for (i = 0; i < bd_count; i++)
1240                 printk(" %08x %08x",
1241                        le32_to_cpu(fd->bd[i].BuffData),
1242                        le32_to_cpu(fd->bd[i].BDCtl));
1243         printk("\n");
1244         return bd_count;
1245 }
1246
1247 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1248 static void
1249 dump_frfd(struct FrFD *fd)
1250 {
1251         int i;
1252         printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1253                le32_to_cpu(fd->fd.FDNext),
1254                le32_to_cpu(fd->fd.FDSystem),
1255                le32_to_cpu(fd->fd.FDStat),
1256                le32_to_cpu(fd->fd.FDCtl));
1257         printk("BD: ");
1258         for (i = 0; i < RX_BUF_NUM; i++)
1259                 printk(" %08x %08x",
1260                        le32_to_cpu(fd->bd[i].BuffData),
1261                        le32_to_cpu(fd->bd[i].BDCtl));
1262         printk("\n");
1263 }
1264 #endif
1265
1266 #ifdef DEBUG
1267 static void
1268 panic_queues(struct net_device *dev)
1269 {
1270         struct tc35815_local *lp = netdev_priv(dev);
1271         int i;
1272
1273         printk("TxFD base %p, start %u, end %u\n",
1274                lp->tfd_base, lp->tfd_start, lp->tfd_end);
1275         printk("RxFD base %p limit %p cur %p\n",
1276                lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1277         printk("FrFD %p\n", lp->fbl_ptr);
1278         for (i = 0; i < TX_FD_NUM; i++)
1279                 dump_txfd(&lp->tfd_base[i]);
1280         for (i = 0; i < RX_FD_NUM; i++) {
1281                 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1282                 i += (bd_count + 1) / 2;        /* skip BDs */
1283         }
1284         dump_frfd(lp->fbl_ptr);
1285         panic("%s: Illegal queue state.", dev->name);
1286 }
1287 #endif
1288
1289 static void print_eth(const u8 *add)
1290 {
1291         printk(KERN_DEBUG "print_eth(%p)\n", add);
1292         printk(KERN_DEBUG " %pM => %pM : %02x%02x\n",
1293                 add + 6, add, add[12], add[13]);
1294 }
1295
1296 static int tc35815_tx_full(struct net_device *dev)
1297 {
1298         struct tc35815_local *lp = netdev_priv(dev);
1299         return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1300 }
1301
1302 static void tc35815_restart(struct net_device *dev)
1303 {
1304         struct tc35815_local *lp = netdev_priv(dev);
1305
1306         if (lp->phy_dev) {
1307                 int timeout;
1308
1309                 phy_write(lp->phy_dev, MII_BMCR, BMCR_RESET);
1310                 timeout = 100;
1311                 while (--timeout) {
1312                         if (!(phy_read(lp->phy_dev, MII_BMCR) & BMCR_RESET))
1313                                 break;
1314                         udelay(1);
1315                 }
1316                 if (!timeout)
1317                         printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1318         }
1319
1320         spin_lock_irq(&lp->lock);
1321         tc35815_chip_reset(dev);
1322         tc35815_clear_queues(dev);
1323         tc35815_chip_init(dev);
1324         /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1325         tc35815_set_multicast_list(dev);
1326         spin_unlock_irq(&lp->lock);
1327
1328         netif_wake_queue(dev);
1329 }
1330
1331 static void tc35815_restart_work(struct work_struct *work)
1332 {
1333         struct tc35815_local *lp =
1334                 container_of(work, struct tc35815_local, restart_work);
1335         struct net_device *dev = lp->dev;
1336
1337         tc35815_restart(dev);
1338 }
1339
1340 static void tc35815_schedule_restart(struct net_device *dev)
1341 {
1342         struct tc35815_local *lp = netdev_priv(dev);
1343         struct tc35815_regs __iomem *tr =
1344                 (struct tc35815_regs __iomem *)dev->base_addr;
1345
1346         /* disable interrupts */
1347         tc_writel(0, &tr->Int_En);
1348         tc_writel(tc_readl(&tr->DMA_Ctl) | DMA_IntMask, &tr->DMA_Ctl);
1349         schedule_work(&lp->restart_work);
1350 }
1351
1352 static void tc35815_tx_timeout(struct net_device *dev)
1353 {
1354         struct tc35815_regs __iomem *tr =
1355                 (struct tc35815_regs __iomem *)dev->base_addr;
1356
1357         printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1358                dev->name, tc_readl(&tr->Tx_Stat));
1359
1360         /* Try to restart the adaptor. */
1361         tc35815_schedule_restart(dev);
1362         dev->stats.tx_errors++;
1363 }
1364
1365 /*
1366  * Open/initialize the controller. This is called (in the current kernel)
1367  * sometime after booting when the 'ifconfig' program is run.
1368  *
1369  * This routine should set everything up anew at each open, even
1370  * registers that "should" only need to be set once at boot, so that
1371  * there is non-reboot way to recover if something goes wrong.
1372  */
1373 static int
1374 tc35815_open(struct net_device *dev)
1375 {
1376         struct tc35815_local *lp = netdev_priv(dev);
1377
1378         /*
1379          * This is used if the interrupt line can turned off (shared).
1380          * See 3c503.c for an example of selecting the IRQ at config-time.
1381          */
1382         if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED,
1383                         dev->name, dev))
1384                 return -EAGAIN;
1385
1386         tc35815_chip_reset(dev);
1387
1388         if (tc35815_init_queues(dev) != 0) {
1389                 free_irq(dev->irq, dev);
1390                 return -EAGAIN;
1391         }
1392
1393 #ifdef TC35815_NAPI
1394         napi_enable(&lp->napi);
1395 #endif
1396
1397         /* Reset the hardware here. Don't forget to set the station address. */
1398         spin_lock_irq(&lp->lock);
1399         tc35815_chip_init(dev);
1400         spin_unlock_irq(&lp->lock);
1401
1402         netif_carrier_off(dev);
1403         /* schedule a link state check */
1404         phy_start(lp->phy_dev);
1405
1406         /* We are now ready to accept transmit requeusts from
1407          * the queueing layer of the networking.
1408          */
1409         netif_start_queue(dev);
1410
1411         return 0;
1412 }
1413
1414 /* This will only be invoked if your driver is _not_ in XOFF state.
1415  * What this means is that you need not check it, and that this
1416  * invariant will hold if you make sure that the netif_*_queue()
1417  * calls are done at the proper times.
1418  */
1419 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1420 {
1421         struct tc35815_local *lp = netdev_priv(dev);
1422         struct TxFD *txfd;
1423         unsigned long flags;
1424
1425         /* If some error occurs while trying to transmit this
1426          * packet, you should return '1' from this function.
1427          * In such a case you _may not_ do anything to the
1428          * SKB, it is still owned by the network queueing
1429          * layer when an error is returned.  This means you
1430          * may not modify any SKB fields, you may not free
1431          * the SKB, etc.
1432          */
1433
1434         /* This is the most common case for modern hardware.
1435          * The spinlock protects this code from the TX complete
1436          * hardware interrupt handler.  Queue flow control is
1437          * thus managed under this lock as well.
1438          */
1439         spin_lock_irqsave(&lp->lock, flags);
1440
1441         /* failsafe... (handle txdone now if half of FDs are used) */
1442         if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1443             TX_FD_NUM / 2)
1444                 tc35815_txdone(dev);
1445
1446         if (netif_msg_pktdata(lp))
1447                 print_eth(skb->data);
1448 #ifdef DEBUG
1449         if (lp->tx_skbs[lp->tfd_start].skb) {
1450                 printk("%s: tx_skbs conflict.\n", dev->name);
1451                 panic_queues(dev);
1452         }
1453 #else
1454         BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1455 #endif
1456         lp->tx_skbs[lp->tfd_start].skb = skb;
1457         lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1458
1459         /*add to ring */
1460         txfd = &lp->tfd_base[lp->tfd_start];
1461         txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1462         txfd->bd.BDCtl = cpu_to_le32(skb->len);
1463         txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1464         txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1465
1466         if (lp->tfd_start == lp->tfd_end) {
1467                 struct tc35815_regs __iomem *tr =
1468                         (struct tc35815_regs __iomem *)dev->base_addr;
1469                 /* Start DMA Transmitter. */
1470                 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1471 #ifdef GATHER_TXINT
1472                 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1473 #endif
1474                 if (netif_msg_tx_queued(lp)) {
1475                         printk("%s: starting TxFD.\n", dev->name);
1476                         dump_txfd(txfd);
1477                 }
1478                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1479         } else {
1480                 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1481                 if (netif_msg_tx_queued(lp)) {
1482                         printk("%s: queueing TxFD.\n", dev->name);
1483                         dump_txfd(txfd);
1484                 }
1485         }
1486         lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1487
1488         dev->trans_start = jiffies;
1489
1490         /* If we just used up the very last entry in the
1491          * TX ring on this device, tell the queueing
1492          * layer to send no more.
1493          */
1494         if (tc35815_tx_full(dev)) {
1495                 if (netif_msg_tx_queued(lp))
1496                         printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1497                 netif_stop_queue(dev);
1498         }
1499
1500         /* When the TX completion hw interrupt arrives, this
1501          * is when the transmit statistics are updated.
1502          */
1503
1504         spin_unlock_irqrestore(&lp->lock, flags);
1505         return 0;
1506 }
1507
1508 #define FATAL_ERROR_INT \
1509         (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1510 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1511 {
1512         static int count;
1513         printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1514                dev->name, status);
1515         if (status & Int_IntPCI)
1516                 printk(" IntPCI");
1517         if (status & Int_DmParErr)
1518                 printk(" DmParErr");
1519         if (status & Int_IntNRAbt)
1520                 printk(" IntNRAbt");
1521         printk("\n");
1522         if (count++ > 100)
1523                 panic("%s: Too many fatal errors.", dev->name);
1524         printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1525         /* Try to restart the adaptor. */
1526         tc35815_schedule_restart(dev);
1527 }
1528
1529 #ifdef TC35815_NAPI
1530 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1531 #else
1532 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1533 #endif
1534 {
1535         struct tc35815_local *lp = netdev_priv(dev);
1536         struct tc35815_regs __iomem *tr =
1537                 (struct tc35815_regs __iomem *)dev->base_addr;
1538         int ret = -1;
1539
1540         /* Fatal errors... */
1541         if (status & FATAL_ERROR_INT) {
1542                 tc35815_fatal_error_interrupt(dev, status);
1543                 return 0;
1544         }
1545         /* recoverable errors */
1546         if (status & Int_IntFDAEx) {
1547                 /* disable FDAEx int. (until we make rooms...) */
1548                 tc_writel(tc_readl(&tr->Int_En) & ~Int_FDAExEn, &tr->Int_En);
1549                 printk(KERN_WARNING
1550                        "%s: Free Descriptor Area Exhausted (%#x).\n",
1551                        dev->name, status);
1552                 dev->stats.rx_dropped++;
1553                 ret = 0;
1554         }
1555         if (status & Int_IntBLEx) {
1556                 /* disable BLEx int. (until we make rooms...) */
1557                 tc_writel(tc_readl(&tr->Int_En) & ~Int_BLExEn, &tr->Int_En);
1558                 printk(KERN_WARNING
1559                        "%s: Buffer List Exhausted (%#x).\n",
1560                        dev->name, status);
1561                 dev->stats.rx_dropped++;
1562                 ret = 0;
1563         }
1564         if (status & Int_IntExBD) {
1565                 printk(KERN_WARNING
1566                        "%s: Excessive Buffer Descriptiors (%#x).\n",
1567                        dev->name, status);
1568                 dev->stats.rx_length_errors++;
1569                 ret = 0;
1570         }
1571
1572         /* normal notification */
1573         if (status & Int_IntMacRx) {
1574                 /* Got a packet(s). */
1575 #ifdef TC35815_NAPI
1576                 ret = tc35815_rx(dev, limit);
1577 #else
1578                 tc35815_rx(dev);
1579                 ret = 0;
1580 #endif
1581                 lp->lstats.rx_ints++;
1582         }
1583         if (status & Int_IntMacTx) {
1584                 /* Transmit complete. */
1585                 lp->lstats.tx_ints++;
1586                 tc35815_txdone(dev);
1587                 netif_wake_queue(dev);
1588                 ret = 0;
1589         }
1590         return ret;
1591 }
1592
1593 /*
1594  * The typical workload of the driver:
1595  * Handle the network interface interrupts.
1596  */
1597 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1598 {
1599         struct net_device *dev = dev_id;
1600         struct tc35815_local *lp = netdev_priv(dev);
1601         struct tc35815_regs __iomem *tr =
1602                 (struct tc35815_regs __iomem *)dev->base_addr;
1603 #ifdef TC35815_NAPI
1604         u32 dmactl = tc_readl(&tr->DMA_Ctl);
1605
1606         if (!(dmactl & DMA_IntMask)) {
1607                 /* disable interrupts */
1608                 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1609                 if (netif_rx_schedule_prep(dev, &lp->napi))
1610                         __netif_rx_schedule(dev, &lp->napi);
1611                 else {
1612                         printk(KERN_ERR "%s: interrupt taken in poll\n",
1613                                dev->name);
1614                         BUG();
1615                 }
1616                 (void)tc_readl(&tr->Int_Src);   /* flush */
1617                 return IRQ_HANDLED;
1618         }
1619         return IRQ_NONE;
1620 #else
1621         int handled;
1622         u32 status;
1623
1624         spin_lock(&lp->lock);
1625         status = tc_readl(&tr->Int_Src);
1626         tc_writel(status, &tr->Int_Src);        /* write to clear */
1627         handled = tc35815_do_interrupt(dev, status);
1628         (void)tc_readl(&tr->Int_Src);   /* flush */
1629         spin_unlock(&lp->lock);
1630         return IRQ_RETVAL(handled >= 0);
1631 #endif /* TC35815_NAPI */
1632 }
1633
1634 #ifdef CONFIG_NET_POLL_CONTROLLER
1635 static void tc35815_poll_controller(struct net_device *dev)
1636 {
1637         disable_irq(dev->irq);
1638         tc35815_interrupt(dev->irq, dev);
1639         enable_irq(dev->irq);
1640 }
1641 #endif
1642
1643 /* We have a good packet(s), get it/them out of the buffers. */
1644 #ifdef TC35815_NAPI
1645 static int
1646 tc35815_rx(struct net_device *dev, int limit)
1647 #else
1648 static void
1649 tc35815_rx(struct net_device *dev)
1650 #endif
1651 {
1652         struct tc35815_local *lp = netdev_priv(dev);
1653         unsigned int fdctl;
1654         int i;
1655         int buf_free_count = 0;
1656         int fd_free_count = 0;
1657 #ifdef TC35815_NAPI
1658         int received = 0;
1659 #endif
1660
1661         while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1662                 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1663                 int pkt_len = fdctl & FD_FDLength_MASK;
1664                 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1665 #ifdef DEBUG
1666                 struct RxFD *next_rfd;
1667 #endif
1668 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1669                 pkt_len -= 4;
1670 #endif
1671
1672                 if (netif_msg_rx_status(lp))
1673                         dump_rxfd(lp->rfd_cur);
1674                 if (status & Rx_Good) {
1675                         struct sk_buff *skb;
1676                         unsigned char *data;
1677                         int cur_bd;
1678 #ifdef TC35815_USE_PACKEDBUFFER
1679                         int offset;
1680 #endif
1681
1682 #ifdef TC35815_NAPI
1683                         if (--limit < 0)
1684                                 break;
1685 #endif
1686 #ifdef TC35815_USE_PACKEDBUFFER
1687                         BUG_ON(bd_count > 2);
1688                         skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
1689                         if (skb == NULL) {
1690                                 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1691                                        dev->name);
1692                                 dev->stats.rx_dropped++;
1693                                 break;
1694                         }
1695                         skb_reserve(skb, 2);   /* 16 bit alignment */
1696
1697                         data = skb_put(skb, pkt_len);
1698
1699                         /* copy from receive buffer */
1700                         cur_bd = 0;
1701                         offset = 0;
1702                         while (offset < pkt_len && cur_bd < bd_count) {
1703                                 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1704                                         BD_BuffLength_MASK;
1705                                 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1706                                 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1707                                 if (offset + len > pkt_len)
1708                                         len = pkt_len - offset;
1709 #ifdef TC35815_DMA_SYNC_ONDEMAND
1710                                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1711                                                             dma, len,
1712                                                             PCI_DMA_FROMDEVICE);
1713 #endif
1714                                 memcpy(data + offset, rxbuf, len);
1715 #ifdef TC35815_DMA_SYNC_ONDEMAND
1716                                 pci_dma_sync_single_for_device(lp->pci_dev,
1717                                                                dma, len,
1718                                                                PCI_DMA_FROMDEVICE);
1719 #endif
1720                                 offset += len;
1721                                 cur_bd++;
1722                         }
1723 #else /* TC35815_USE_PACKEDBUFFER */
1724                         BUG_ON(bd_count > 1);
1725                         cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1726                                   & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1727 #ifdef DEBUG
1728                         if (cur_bd >= RX_BUF_NUM) {
1729                                 printk("%s: invalid BDID.\n", dev->name);
1730                                 panic_queues(dev);
1731                         }
1732                         BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1733                                (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1734                         if (!lp->rx_skbs[cur_bd].skb) {
1735                                 printk("%s: NULL skb.\n", dev->name);
1736                                 panic_queues(dev);
1737                         }
1738 #else
1739                         BUG_ON(cur_bd >= RX_BUF_NUM);
1740 #endif
1741                         skb = lp->rx_skbs[cur_bd].skb;
1742                         prefetch(skb->data);
1743                         lp->rx_skbs[cur_bd].skb = NULL;
1744                         pci_unmap_single(lp->pci_dev,
1745                                          lp->rx_skbs[cur_bd].skb_dma,
1746                                          RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1747                         if (!HAVE_DMA_RXALIGN(lp))
1748                                 memmove(skb->data, skb->data - 2, pkt_len);
1749                         data = skb_put(skb, pkt_len);
1750 #endif /* TC35815_USE_PACKEDBUFFER */
1751                         if (netif_msg_pktdata(lp))
1752                                 print_eth(data);
1753                         skb->protocol = eth_type_trans(skb, dev);
1754 #ifdef TC35815_NAPI
1755                         netif_receive_skb(skb);
1756                         received++;
1757 #else
1758                         netif_rx(skb);
1759 #endif
1760                         dev->stats.rx_packets++;
1761                         dev->stats.rx_bytes += pkt_len;
1762                 } else {
1763                         dev->stats.rx_errors++;
1764                         printk(KERN_DEBUG "%s: Rx error (status %x)\n",
1765                                dev->name, status & Rx_Stat_Mask);
1766                         /* WORKAROUND: LongErr and CRCErr means Overflow. */
1767                         if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1768                                 status &= ~(Rx_LongErr|Rx_CRCErr);
1769                                 status |= Rx_Over;
1770                         }
1771                         if (status & Rx_LongErr)
1772                                 dev->stats.rx_length_errors++;
1773                         if (status & Rx_Over)
1774                                 dev->stats.rx_fifo_errors++;
1775                         if (status & Rx_CRCErr)
1776                                 dev->stats.rx_crc_errors++;
1777                         if (status & Rx_Align)
1778                                 dev->stats.rx_frame_errors++;
1779                 }
1780
1781                 if (bd_count > 0) {
1782                         /* put Free Buffer back to controller */
1783                         int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1784                         unsigned char id =
1785                                 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1786 #ifdef DEBUG
1787                         if (id >= RX_BUF_NUM) {
1788                                 printk("%s: invalid BDID.\n", dev->name);
1789                                 panic_queues(dev);
1790                         }
1791 #else
1792                         BUG_ON(id >= RX_BUF_NUM);
1793 #endif
1794                         /* free old buffers */
1795 #ifdef TC35815_USE_PACKEDBUFFER
1796                         while (lp->fbl_curid != id)
1797 #else
1798                         lp->fbl_count--;
1799                         while (lp->fbl_count < RX_BUF_NUM)
1800 #endif
1801                         {
1802 #ifdef TC35815_USE_PACKEDBUFFER
1803                                 unsigned char curid = lp->fbl_curid;
1804 #else
1805                                 unsigned char curid =
1806                                         (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1807 #endif
1808                                 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1809 #ifdef DEBUG
1810                                 bdctl = le32_to_cpu(bd->BDCtl);
1811                                 if (bdctl & BD_CownsBD) {
1812                                         printk("%s: Freeing invalid BD.\n",
1813                                                dev->name);
1814                                         panic_queues(dev);
1815                                 }
1816 #endif
1817                                 /* pass BD to controller */
1818 #ifndef TC35815_USE_PACKEDBUFFER
1819                                 if (!lp->rx_skbs[curid].skb) {
1820                                         lp->rx_skbs[curid].skb =
1821                                                 alloc_rxbuf_skb(dev,
1822                                                                 lp->pci_dev,
1823                                                                 &lp->rx_skbs[curid].skb_dma);
1824                                         if (!lp->rx_skbs[curid].skb)
1825                                                 break; /* try on next reception */
1826                                         bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1827                                 }
1828 #endif /* TC35815_USE_PACKEDBUFFER */
1829                                 /* Note: BDLength was modified by chip. */
1830                                 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1831                                                         (curid << BD_RxBDID_SHIFT) |
1832                                                         RX_BUF_SIZE);
1833 #ifdef TC35815_USE_PACKEDBUFFER
1834                                 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1835                                 if (netif_msg_rx_status(lp)) {
1836                                         printk("%s: Entering new FBD %d\n",
1837                                                dev->name, lp->fbl_curid);
1838                                         dump_frfd(lp->fbl_ptr);
1839                                 }
1840 #else
1841                                 lp->fbl_count++;
1842 #endif
1843                                 buf_free_count++;
1844                         }
1845                 }
1846
1847                 /* put RxFD back to controller */
1848 #ifdef DEBUG
1849                 next_rfd = fd_bus_to_virt(lp,
1850                                           le32_to_cpu(lp->rfd_cur->fd.FDNext));
1851                 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1852                         printk("%s: RxFD FDNext invalid.\n", dev->name);
1853                         panic_queues(dev);
1854                 }
1855 #endif
1856                 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1857                         /* pass FD to controller */
1858 #ifdef DEBUG
1859                         lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1860 #else
1861                         lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1862 #endif
1863                         lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1864                         lp->rfd_cur++;
1865                         fd_free_count++;
1866                 }
1867                 if (lp->rfd_cur > lp->rfd_limit)
1868                         lp->rfd_cur = lp->rfd_base;
1869 #ifdef DEBUG
1870                 if (lp->rfd_cur != next_rfd)
1871                         printk("rfd_cur = %p, next_rfd %p\n",
1872                                lp->rfd_cur, next_rfd);
1873 #endif
1874         }
1875
1876         /* re-enable BL/FDA Exhaust interrupts. */
1877         if (fd_free_count) {
1878                 struct tc35815_regs __iomem *tr =
1879                         (struct tc35815_regs __iomem *)dev->base_addr;
1880                 u32 en, en_old = tc_readl(&tr->Int_En);
1881                 en = en_old | Int_FDAExEn;
1882                 if (buf_free_count)
1883                         en |= Int_BLExEn;
1884                 if (en != en_old)
1885                         tc_writel(en, &tr->Int_En);
1886         }
1887 #ifdef TC35815_NAPI
1888         return received;
1889 #endif
1890 }
1891
1892 #ifdef TC35815_NAPI
1893 static int tc35815_poll(struct napi_struct *napi, int budget)
1894 {
1895         struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1896         struct net_device *dev = lp->dev;
1897         struct tc35815_regs __iomem *tr =
1898                 (struct tc35815_regs __iomem *)dev->base_addr;
1899         int received = 0, handled;
1900         u32 status;
1901
1902         spin_lock(&lp->lock);
1903         status = tc_readl(&tr->Int_Src);
1904         do {
1905                 tc_writel(status, &tr->Int_Src);        /* write to clear */
1906
1907                 handled = tc35815_do_interrupt(dev, status, limit);
1908                 if (handled >= 0) {
1909                         received += handled;
1910                         if (received >= budget)
1911                                 break;
1912                 }
1913                 status = tc_readl(&tr->Int_Src);
1914         } while (status);
1915         spin_unlock(&lp->lock);
1916
1917         if (received < budget) {
1918                 netif_rx_complete(dev, napi);
1919                 /* enable interrupts */
1920                 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1921         }
1922         return received;
1923 }
1924 #endif
1925
1926 #ifdef NO_CHECK_CARRIER
1927 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1928 #else
1929 #define TX_STA_ERR      (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1930 #endif
1931
1932 static void
1933 tc35815_check_tx_stat(struct net_device *dev, int status)
1934 {
1935         struct tc35815_local *lp = netdev_priv(dev);
1936         const char *msg = NULL;
1937
1938         /* count collisions */
1939         if (status & Tx_ExColl)
1940                 dev->stats.collisions += 16;
1941         if (status & Tx_TxColl_MASK)
1942                 dev->stats.collisions += status & Tx_TxColl_MASK;
1943
1944 #ifndef NO_CHECK_CARRIER
1945         /* TX4939 does not have NCarr */
1946         if (lp->chiptype == TC35815_TX4939)
1947                 status &= ~Tx_NCarr;
1948 #ifdef WORKAROUND_LOSTCAR
1949         /* WORKAROUND: ignore LostCrS in full duplex operation */
1950         if (!lp->link || lp->duplex == DUPLEX_FULL)
1951                 status &= ~Tx_NCarr;
1952 #endif
1953 #endif
1954
1955         if (!(status & TX_STA_ERR)) {
1956                 /* no error. */
1957                 dev->stats.tx_packets++;
1958                 return;
1959         }
1960
1961         dev->stats.tx_errors++;
1962         if (status & Tx_ExColl) {
1963                 dev->stats.tx_aborted_errors++;
1964                 msg = "Excessive Collision.";
1965         }
1966         if (status & Tx_Under) {
1967                 dev->stats.tx_fifo_errors++;
1968                 msg = "Tx FIFO Underrun.";
1969                 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1970                         lp->lstats.tx_underrun++;
1971                         if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1972                                 struct tc35815_regs __iomem *tr =
1973                                         (struct tc35815_regs __iomem *)dev->base_addr;
1974                                 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1975                                 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1976                         }
1977                 }
1978         }
1979         if (status & Tx_Defer) {
1980                 dev->stats.tx_fifo_errors++;
1981                 msg = "Excessive Deferral.";
1982         }
1983 #ifndef NO_CHECK_CARRIER
1984         if (status & Tx_NCarr) {
1985                 dev->stats.tx_carrier_errors++;
1986                 msg = "Lost Carrier Sense.";
1987         }
1988 #endif
1989         if (status & Tx_LateColl) {
1990                 dev->stats.tx_aborted_errors++;
1991                 msg = "Late Collision.";
1992         }
1993         if (status & Tx_TxPar) {
1994                 dev->stats.tx_fifo_errors++;
1995                 msg = "Transmit Parity Error.";
1996         }
1997         if (status & Tx_SQErr) {
1998                 dev->stats.tx_heartbeat_errors++;
1999                 msg = "Signal Quality Error.";
2000         }
2001         if (msg && netif_msg_tx_err(lp))
2002                 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
2003 }
2004
2005 /* This handles TX complete events posted by the device
2006  * via interrupts.
2007  */
2008 static void
2009 tc35815_txdone(struct net_device *dev)
2010 {
2011         struct tc35815_local *lp = netdev_priv(dev);
2012         struct TxFD *txfd;
2013         unsigned int fdctl;
2014
2015         txfd = &lp->tfd_base[lp->tfd_end];
2016         while (lp->tfd_start != lp->tfd_end &&
2017                !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
2018                 int status = le32_to_cpu(txfd->fd.FDStat);
2019                 struct sk_buff *skb;
2020                 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
2021                 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
2022
2023                 if (netif_msg_tx_done(lp)) {
2024                         printk("%s: complete TxFD.\n", dev->name);
2025                         dump_txfd(txfd);
2026                 }
2027                 tc35815_check_tx_stat(dev, status);
2028
2029                 skb = fdsystem != 0xffffffff ?
2030                         lp->tx_skbs[fdsystem].skb : NULL;
2031 #ifdef DEBUG
2032                 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
2033                         printk("%s: tx_skbs mismatch.\n", dev->name);
2034                         panic_queues(dev);
2035                 }
2036 #else
2037                 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
2038 #endif
2039                 if (skb) {
2040                         dev->stats.tx_bytes += skb->len;
2041                         pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
2042                         lp->tx_skbs[lp->tfd_end].skb = NULL;
2043                         lp->tx_skbs[lp->tfd_end].skb_dma = 0;
2044 #ifdef TC35815_NAPI
2045                         dev_kfree_skb_any(skb);
2046 #else
2047                         dev_kfree_skb_irq(skb);
2048 #endif
2049                 }
2050                 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
2051
2052                 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
2053                 txfd = &lp->tfd_base[lp->tfd_end];
2054 #ifdef DEBUG
2055                 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
2056                         printk("%s: TxFD FDNext invalid.\n", dev->name);
2057                         panic_queues(dev);
2058                 }
2059 #endif
2060                 if (fdnext & FD_Next_EOL) {
2061                         /* DMA Transmitter has been stopping... */
2062                         if (lp->tfd_end != lp->tfd_start) {
2063                                 struct tc35815_regs __iomem *tr =
2064                                         (struct tc35815_regs __iomem *)dev->base_addr;
2065                                 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
2066                                 struct TxFD *txhead = &lp->tfd_base[head];
2067                                 int qlen = (lp->tfd_start + TX_FD_NUM
2068                                             - lp->tfd_end) % TX_FD_NUM;
2069
2070 #ifdef DEBUG
2071                                 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
2072                                         printk("%s: TxFD FDCtl invalid.\n", dev->name);
2073                                         panic_queues(dev);
2074                                 }
2075 #endif
2076                                 /* log max queue length */
2077                                 if (lp->lstats.max_tx_qlen < qlen)
2078                                         lp->lstats.max_tx_qlen = qlen;
2079
2080
2081                                 /* start DMA Transmitter again */
2082                                 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
2083 #ifdef GATHER_TXINT
2084                                 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
2085 #endif
2086                                 if (netif_msg_tx_queued(lp)) {
2087                                         printk("%s: start TxFD on queue.\n",
2088                                                dev->name);
2089                                         dump_txfd(txfd);
2090                                 }
2091                                 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
2092                         }
2093                         break;
2094                 }
2095         }
2096
2097         /* If we had stopped the queue due to a "tx full"
2098          * condition, and space has now been made available,
2099          * wake up the queue.
2100          */
2101         if (netif_queue_stopped(dev) && !tc35815_tx_full(dev))
2102                 netif_wake_queue(dev);
2103 }
2104
2105 /* The inverse routine to tc35815_open(). */
2106 static int
2107 tc35815_close(struct net_device *dev)
2108 {
2109         struct tc35815_local *lp = netdev_priv(dev);
2110
2111         netif_stop_queue(dev);
2112 #ifdef TC35815_NAPI
2113         napi_disable(&lp->napi);
2114 #endif
2115         if (lp->phy_dev)
2116                 phy_stop(lp->phy_dev);
2117         cancel_work_sync(&lp->restart_work);
2118
2119         /* Flush the Tx and disable Rx here. */
2120         tc35815_chip_reset(dev);
2121         free_irq(dev->irq, dev);
2122
2123         tc35815_free_queues(dev);
2124
2125         return 0;
2126
2127 }
2128
2129 /*
2130  * Get the current statistics.
2131  * This may be called with the card open or closed.
2132  */
2133 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
2134 {
2135         struct tc35815_regs __iomem *tr =
2136                 (struct tc35815_regs __iomem *)dev->base_addr;
2137         if (netif_running(dev))
2138                 /* Update the statistics from the device registers. */
2139                 dev->stats.rx_missed_errors = tc_readl(&tr->Miss_Cnt);
2140
2141         return &dev->stats;
2142 }
2143
2144 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
2145 {
2146         struct tc35815_local *lp = netdev_priv(dev);
2147         struct tc35815_regs __iomem *tr =
2148                 (struct tc35815_regs __iomem *)dev->base_addr;
2149         int cam_index = index * 6;
2150         u32 cam_data;
2151         u32 saved_addr;
2152
2153         saved_addr = tc_readl(&tr->CAM_Adr);
2154
2155         if (netif_msg_hw(lp))
2156                 printk(KERN_DEBUG "%s: CAM %d: %pM\n",
2157                         dev->name, index, addr);
2158         if (index & 1) {
2159                 /* read modify write */
2160                 tc_writel(cam_index - 2, &tr->CAM_Adr);
2161                 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
2162                 cam_data |= addr[0] << 8 | addr[1];
2163                 tc_writel(cam_data, &tr->CAM_Data);
2164                 /* write whole word */
2165                 tc_writel(cam_index + 2, &tr->CAM_Adr);
2166                 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
2167                 tc_writel(cam_data, &tr->CAM_Data);
2168         } else {
2169                 /* write whole word */
2170                 tc_writel(cam_index, &tr->CAM_Adr);
2171                 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
2172                 tc_writel(cam_data, &tr->CAM_Data);
2173                 /* read modify write */
2174                 tc_writel(cam_index + 4, &tr->CAM_Adr);
2175                 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
2176                 cam_data |= addr[4] << 24 | (addr[5] << 16);
2177                 tc_writel(cam_data, &tr->CAM_Data);
2178         }
2179
2180         tc_writel(saved_addr, &tr->CAM_Adr);
2181 }
2182
2183
2184 /*
2185  * Set or clear the multicast filter for this adaptor.
2186  * num_addrs == -1      Promiscuous mode, receive all packets
2187  * num_addrs == 0       Normal mode, clear multicast list
2188  * num_addrs > 0        Multicast mode, receive normal and MC packets,
2189  *                      and do best-effort filtering.
2190  */
2191 static void
2192 tc35815_set_multicast_list(struct net_device *dev)
2193 {
2194         struct tc35815_regs __iomem *tr =
2195                 (struct tc35815_regs __iomem *)dev->base_addr;
2196
2197         if (dev->flags & IFF_PROMISC) {
2198 #ifdef WORKAROUND_100HALF_PROMISC
2199                 /* With some (all?) 100MHalf HUB, controller will hang
2200                  * if we enabled promiscuous mode before linkup... */
2201                 struct tc35815_local *lp = netdev_priv(dev);
2202
2203                 if (!lp->link)
2204                         return;
2205 #endif
2206                 /* Enable promiscuous mode */
2207                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2208         } else if ((dev->flags & IFF_ALLMULTI) ||
2209                   dev->mc_count > CAM_ENTRY_MAX - 3) {
2210                 /* CAM 0, 1, 20 are reserved. */
2211                 /* Disable promiscuous mode, use normal mode. */
2212                 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2213         } else if (dev->mc_count) {
2214                 struct dev_mc_list *cur_addr = dev->mc_list;
2215                 int i;
2216                 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2217
2218                 tc_writel(0, &tr->CAM_Ctl);
2219                 /* Walk the address list, and load the filter */
2220                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2221                         if (!cur_addr)
2222                                 break;
2223                         /* entry 0,1 is reserved. */
2224                         tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2225                         ena_bits |= CAM_Ena_Bit(i + 2);
2226                 }
2227                 tc_writel(ena_bits, &tr->CAM_Ena);
2228                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2229         } else {
2230                 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2231                 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2232         }
2233 }
2234
2235 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2236 {
2237         struct tc35815_local *lp = netdev_priv(dev);
2238         strcpy(info->driver, MODNAME);
2239         strcpy(info->version, DRV_VERSION);
2240         strcpy(info->bus_info, pci_name(lp->pci_dev));
2241 }
2242
2243 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2244 {
2245         struct tc35815_local *lp = netdev_priv(dev);
2246
2247         if (!lp->phy_dev)
2248                 return -ENODEV;
2249         return phy_ethtool_gset(lp->phy_dev, cmd);
2250 }
2251
2252 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2253 {
2254         struct tc35815_local *lp = netdev_priv(dev);
2255
2256         if (!lp->phy_dev)
2257                 return -ENODEV;
2258         return phy_ethtool_sset(lp->phy_dev, cmd);
2259 }
2260
2261 static u32 tc35815_get_msglevel(struct net_device *dev)
2262 {
2263         struct tc35815_local *lp = netdev_priv(dev);
2264         return lp->msg_enable;
2265 }
2266
2267 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2268 {
2269         struct tc35815_local *lp = netdev_priv(dev);
2270         lp->msg_enable = datum;
2271 }
2272
2273 static int tc35815_get_sset_count(struct net_device *dev, int sset)
2274 {
2275         struct tc35815_local *lp = netdev_priv(dev);
2276
2277         switch (sset) {
2278         case ETH_SS_STATS:
2279                 return sizeof(lp->lstats) / sizeof(int);
2280         default:
2281                 return -EOPNOTSUPP;
2282         }
2283 }
2284
2285 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2286 {
2287         struct tc35815_local *lp = netdev_priv(dev);
2288         data[0] = lp->lstats.max_tx_qlen;
2289         data[1] = lp->lstats.tx_ints;
2290         data[2] = lp->lstats.rx_ints;
2291         data[3] = lp->lstats.tx_underrun;
2292 }
2293
2294 static struct {
2295         const char str[ETH_GSTRING_LEN];
2296 } ethtool_stats_keys[] = {
2297         { "max_tx_qlen" },
2298         { "tx_ints" },
2299         { "rx_ints" },
2300         { "tx_underrun" },
2301 };
2302
2303 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2304 {
2305         memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2306 }
2307
2308 static const struct ethtool_ops tc35815_ethtool_ops = {
2309         .get_drvinfo            = tc35815_get_drvinfo,
2310         .get_settings           = tc35815_get_settings,
2311         .set_settings           = tc35815_set_settings,
2312         .get_link               = ethtool_op_get_link,
2313         .get_msglevel           = tc35815_get_msglevel,
2314         .set_msglevel           = tc35815_set_msglevel,
2315         .get_strings            = tc35815_get_strings,
2316         .get_sset_count         = tc35815_get_sset_count,
2317         .get_ethtool_stats      = tc35815_get_ethtool_stats,
2318 };
2319
2320 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2321 {
2322         struct tc35815_local *lp = netdev_priv(dev);
2323
2324         if (!netif_running(dev))
2325                 return -EINVAL;
2326         if (!lp->phy_dev)
2327                 return -ENODEV;
2328         return phy_mii_ioctl(lp->phy_dev, if_mii(rq), cmd);
2329 }
2330
2331 static void tc35815_chip_reset(struct net_device *dev)
2332 {
2333         struct tc35815_regs __iomem *tr =
2334                 (struct tc35815_regs __iomem *)dev->base_addr;
2335         int i;
2336         /* reset the controller */
2337         tc_writel(MAC_Reset, &tr->MAC_Ctl);
2338         udelay(4); /* 3200ns */
2339         i = 0;
2340         while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2341                 if (i++ > 100) {
2342                         printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2343                         break;
2344                 }
2345                 mdelay(1);
2346         }
2347         tc_writel(0, &tr->MAC_Ctl);
2348
2349         /* initialize registers to default value */
2350         tc_writel(0, &tr->DMA_Ctl);
2351         tc_writel(0, &tr->TxThrsh);
2352         tc_writel(0, &tr->TxPollCtr);
2353         tc_writel(0, &tr->RxFragSize);
2354         tc_writel(0, &tr->Int_En);
2355         tc_writel(0, &tr->FDA_Bas);
2356         tc_writel(0, &tr->FDA_Lim);
2357         tc_writel(0xffffffff, &tr->Int_Src);    /* Write 1 to clear */
2358         tc_writel(0, &tr->CAM_Ctl);
2359         tc_writel(0, &tr->Tx_Ctl);
2360         tc_writel(0, &tr->Rx_Ctl);
2361         tc_writel(0, &tr->CAM_Ena);
2362         (void)tc_readl(&tr->Miss_Cnt);  /* Read to clear */
2363
2364         /* initialize internal SRAM */
2365         tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2366         for (i = 0; i < 0x1000; i += 4) {
2367                 tc_writel(i, &tr->CAM_Adr);
2368                 tc_writel(0, &tr->CAM_Data);
2369         }
2370         tc_writel(0, &tr->DMA_Ctl);
2371 }
2372
2373 static void tc35815_chip_init(struct net_device *dev)
2374 {
2375         struct tc35815_local *lp = netdev_priv(dev);
2376         struct tc35815_regs __iomem *tr =
2377                 (struct tc35815_regs __iomem *)dev->base_addr;
2378         unsigned long txctl = TX_CTL_CMD;
2379
2380         /* load station address to CAM */
2381         tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2382
2383         /* Enable CAM (broadcast and unicast) */
2384         tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2385         tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2386
2387         /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2388         if (HAVE_DMA_RXALIGN(lp))
2389                 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2390         else
2391                 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2392 #ifdef TC35815_USE_PACKEDBUFFER
2393         tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize);   /* Packing */
2394 #else
2395         tc_writel(ETH_ZLEN, &tr->RxFragSize);
2396 #endif
2397         tc_writel(0, &tr->TxPollCtr);   /* Batch mode */
2398         tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2399         tc_writel(INT_EN_CMD, &tr->Int_En);
2400
2401         /* set queues */
2402         tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2403         tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2404                   &tr->FDA_Lim);
2405         /*
2406          * Activation method:
2407          * First, enable the MAC Transmitter and the DMA Receive circuits.
2408          * Then enable the DMA Transmitter and the MAC Receive circuits.
2409          */
2410         tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr);      /* start DMA receiver */
2411         tc_writel(RX_CTL_CMD, &tr->Rx_Ctl);     /* start MAC receiver */
2412
2413         /* start MAC transmitter */
2414 #ifndef NO_CHECK_CARRIER
2415         /* TX4939 does not have EnLCarr */
2416         if (lp->chiptype == TC35815_TX4939)
2417                 txctl &= ~Tx_EnLCarr;
2418 #ifdef WORKAROUND_LOSTCAR
2419         /* WORKAROUND: ignore LostCrS in full duplex operation */
2420         if (!lp->phy_dev || !lp->link || lp->duplex == DUPLEX_FULL)
2421                 txctl &= ~Tx_EnLCarr;
2422 #endif
2423 #endif /* !NO_CHECK_CARRIER */
2424 #ifdef GATHER_TXINT
2425         txctl &= ~Tx_EnComp;    /* disable global tx completion int. */
2426 #endif
2427         tc_writel(txctl, &tr->Tx_Ctl);
2428 }
2429
2430 #ifdef CONFIG_PM
2431 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2432 {
2433         struct net_device *dev = pci_get_drvdata(pdev);
2434         struct tc35815_local *lp = netdev_priv(dev);
2435         unsigned long flags;
2436
2437         pci_save_state(pdev);
2438         if (!netif_running(dev))
2439                 return 0;
2440         netif_device_detach(dev);
2441         if (lp->phy_dev)
2442                 phy_stop(lp->phy_dev);
2443         spin_lock_irqsave(&lp->lock, flags);
2444         tc35815_chip_reset(dev);
2445         spin_unlock_irqrestore(&lp->lock, flags);
2446         pci_set_power_state(pdev, PCI_D3hot);
2447         return 0;
2448 }
2449
2450 static int tc35815_resume(struct pci_dev *pdev)
2451 {
2452         struct net_device *dev = pci_get_drvdata(pdev);
2453         struct tc35815_local *lp = netdev_priv(dev);
2454
2455         pci_restore_state(pdev);
2456         if (!netif_running(dev))
2457                 return 0;
2458         pci_set_power_state(pdev, PCI_D0);
2459         tc35815_restart(dev);
2460         netif_carrier_off(dev);
2461         if (lp->phy_dev)
2462                 phy_start(lp->phy_dev);
2463         netif_device_attach(dev);
2464         return 0;
2465 }
2466 #endif /* CONFIG_PM */
2467
2468 static struct pci_driver tc35815_pci_driver = {
2469         .name           = MODNAME,
2470         .id_table       = tc35815_pci_tbl,
2471         .probe          = tc35815_init_one,
2472         .remove         = __devexit_p(tc35815_remove_one),
2473 #ifdef CONFIG_PM
2474         .suspend        = tc35815_suspend,
2475         .resume         = tc35815_resume,
2476 #endif
2477 };
2478
2479 module_param_named(speed, options.speed, int, 0);
2480 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2481 module_param_named(duplex, options.duplex, int, 0);
2482 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2483
2484 static int __init tc35815_init_module(void)
2485 {
2486         return pci_register_driver(&tc35815_pci_driver);
2487 }
2488
2489 static void __exit tc35815_cleanup_module(void)
2490 {
2491         pci_unregister_driver(&tc35815_pci_driver);
2492 }
2493
2494 module_init(tc35815_init_module);
2495 module_exit(tc35815_cleanup_module);
2496
2497 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2498 MODULE_LICENSE("GPL");