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