Modules/Network/RTL8139/rtl8139.c

   1 /*
   2  * Acess2 RTL8139 Driver
   3  * - By John Hodge (thePowersGang)
   4  */
   5 #define DEBUG   0
   6 #define VERSION ((0<<8)|20)
   7 #include <acess.h>
   8 #include <modules.h>
   9 #include <fs_devfs.h>
  10 #include <drv_pci.h>
  11 #include <tpl_drv_network.h>
  12 #include <semaphore.h>
  13
  14 // === CONSTANTS ===
  15 #define VENDOR_ID       0x10EC
  16 #define DEVICE_ID       0x8139
  17
  18 enum eRTL8139_Regs
  19 {
  20         // MAC Address
  21         MAC0, MAC1, MAC2,
  22         MAC3, MAC4, MAC5,
  23
  24         // Multicast Registers
  25         MAR0 = 0x08, MAR1, MAR2, MAR3,
  26         MAR4, MAR5, MAR6, MAR7,
  27
  28         // Transmit status of descriptors 0 - 3
  29         TSD0 = 0x10,    TSD1 = 0x14,
  30         TSD2 = 0x18,    TSD3 = 0x1C,
  31         // Transmit start addresses
  32         TSAD0 = 0x20,   TSAD1 = 0x24,
  33         TSAD2 = 0x28,   TSAD3 = 0x2C,
  34
  35         RBSTART = 0x30, //!< Recieve Buffer Start (DWord)
  36         // Early Recieve Byte Count
  37         ERBCR = 0x34,   // 16-bits
  38         // Early RX Status Register
  39         ERSR = 0x36,
  40
  41         // ??, ??, ??, RST, RE, TE, ??, ??
  42         CMD     = 0x37,
  43
  44         CAPR    = 0x38, // Current address of packet read
  45         CBA     = 0x3A, // Current Buffer Address - Total byte count in RX buffer
  46
  47         IMR     = 0x3C, // Interrupt mask register
  48         ISR     = 0x3E, // Interrupt status register
  49
  50         TCR     = 0x40, // Transmit Configuration Register
  51         RCR     = 0x44, // Recieve Configuration Register
  52         TCTR    = 0x48, // 32-bit timer (count)
  53         MPC     = 0x4C, // Missed packet count (due to RX overflow)
  54
  55         CR_9346 = 0x50,
  56         CONFIG0 = 0x51,
  57         CONFIG1 = 0x52,
  58         // 0x53 resvd
  59         TIMERINT = 0x54,        // Fires a timeout when TCTR equals this value
  60
  61 };
  62
  63 #define FLAG_ISR_TOK    0x04
  64 #define FLAG_ISR_ROK    0x01
  65
  66 // === TYPES ===
  67 typedef struct sCard
  68 {
  69         Uint16  IOBase;
  70         Uint8   IRQ;
  71
  72          int    NumWaitingPackets;
  73
  74         char    *ReceiveBuffer;
  75         tPAddr  PhysReceiveBuffer;
  76          int    ReceiveBufferLength;
  77          int    SeenOfs;        //!< End of the most recently seen packet (by IRQ)
  78         tMutex  ReadMutex;
  79         tSemaphore      ReadSemaphore;
  80
  81         char    *TransmitBuffers[4];
  82         tPAddr  PhysTransmitBuffers[4];
  83         BOOL    TransmitInUse;  // Flags for each transmit descriptor
  84          int    CurTXDecscriptor;
  85
  86         char    Name[2];
  87         tVFS_Node       Node;
  88         Uint8   MacAddr[6];
  89 }       tCard;
  90
  91 // === PROTOTYPES ===
  92  int    RTL8139_Install(char **Options);
  93 char    *RTL8139_ReadDir(tVFS_Node *Node, int Pos);
  94 tVFS_Node       *RTL8139_FindDir(tVFS_Node *Node, const char *Filename);
  95  int    RTL8139_RootIOCtl(tVFS_Node *Node, int ID, void *Arg);
  96 Uint64  RTL8139_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  97 Uint64  RTL8139_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
  98  int    RTL8139_IOCtl(tVFS_Node *Node, int ID, void *Arg);
  99 void    RTL8139_IRQHandler(int Num);
 100
 101 // === GLOBALS ===
 102 MODULE_DEFINE(0, VERSION, RTL8139, RTL8139_Install, NULL, NULL);
 103 tDevFS_Driver   gRTL8139_DriverInfo = {
 104         NULL, "RTL8139",
 105         {
 106         .NumACLs = 1,
 107         .ACLs = &gVFS_ACL_EveryoneRX,
 108         .Flags = VFS_FFLAG_DIRECTORY,
 109         .ReadDir = RTL8139_ReadDir,
 110         .FindDir = RTL8139_FindDir,
 111         .IOCtl = RTL8139_RootIOCtl
 112         }
 113 };
 114  int    giRTL8139_CardCount;
 115 tCard   *gaRTL8139_Cards;
 116
 117 // === CODE ===
 118 /**
 119  * \brief Installs the RTL8139 Driver
 120  */
 121 int RTL8139_Install(char **Options)
 122 {
 123          int    id = -1;
 124          int    i = 0;
 125         Uint16  base;
 126         tCard   *card;
 127
 128         giRTL8139_CardCount = PCI_CountDevices(VENDOR_ID, DEVICE_ID);
 129         Log_Debug("RTL8139", "%i cards", giRTL8139_CardCount);
 130
 131         if( giRTL8139_CardCount == 0 )  return MODULE_ERR_NOTNEEDED;
 132
 133         gaRTL8139_Cards = calloc( giRTL8139_CardCount, sizeof(tCard) );
 134
 135         //while( (id = PCI_GetDevice(0x10EC, 0x8139, 0, id)) != -1 )
 136         while( (id = PCI_GetDevice(VENDOR_ID, DEVICE_ID, i)) != -1 )
 137         {
 138                 card = &gaRTL8139_Cards[i];
 139                 base = PCI_GetBAR( id, 0 );
 140                 card->IOBase = base;
 141                 card->IRQ = PCI_GetIRQ( id );
 142
 143                 // Install IRQ Handler
 144                 IRQ_AddHandler(card->IRQ, RTL8139_IRQHandler);
 145
 146                 // Power on
 147                 outb( base + CONFIG1, 0x00 );
 148
 149                 // Reset (0x10 to CMD)
 150                 outb( base + CMD, 0x10 );
 151                 while( inb(base + CMD) & 0x10 ) ;
 152
 153                 // Set up recieve buffer
 154                 // - Allocate 3 pages below 4GiB for the recieve buffer (Allows 8k+16+1500)
 155                 card->ReceiveBuffer = (void*)MM_AllocDMA( 3, 32, &card->PhysReceiveBuffer );
 156                 card->ReceiveBufferLength = 8*1024+16;
 157                 outd(base + RBSTART, (Uint32)card->PhysReceiveBuffer);
 158                 outd(base + CBA, 0);
 159                 outd(base + CAPR, 0);
 160                 // Set IMR to Transmit OK and Receive OK
 161                 outw(base + IMR, 0x5);
 162
 163                 // Set up transmit buffers
 164                 // - 2 non-contiguous pages (each page can fit 2 1500 byte packets)
 165                 card->TransmitBuffers[0] = (void*)MM_AllocDMA( 1, 32, &card->PhysTransmitBuffers[0] );
 166                 card->TransmitBuffers[1] = card->TransmitBuffers[0] + 0x800;
 167                 card->PhysTransmitBuffers[1] = card->PhysTransmitBuffers[0] + 0x800;
 168
 169                 card->TransmitBuffers[2] = (void*)MM_AllocDMA( 1, 32, &card->PhysTransmitBuffers[2] );
 170                 card->TransmitBuffers[3] = card->TransmitBuffers[2] + 0x800;
 171                 card->PhysTransmitBuffers[3] = card->PhysTransmitBuffers[2] + 0x800;
 172
 173                 outd(base + TSAD0, card->PhysTransmitBuffers[0]);
 174                 outd(base + TSAD1, card->PhysTransmitBuffers[1]);
 175                 outd(base + TSAD2, card->PhysTransmitBuffers[2]);
 176                 outd(base + TSAD3, card->PhysTransmitBuffers[3]);
 177
 178                 // Set recieve buffer size and recieve mask
 179                 // - Bit 7 being unset tells the card to overflow the recieve buffer if needed
 180                 //   (i.e. when the packet starts at the end of the bufffer, it overflows up
 181                 //    to 1500 bytes)
 182                 outd(base + RCR, 0x0F);
 183
 184                 // Recive Enable and Transmit Enable
 185                 outb(base + CMD, 0x0C);
 186
 187                 // Get the card's MAC address
 188                 card->MacAddr[0] = inb(base+MAC0);
 189                 card->MacAddr[1] = inb(base+MAC1);
 190                 card->MacAddr[2] = inb(base+MAC2);
 191                 card->MacAddr[3] = inb(base+MAC3);
 192                 card->MacAddr[4] = inb(base+MAC4);
 193                 card->MacAddr[5] = inb(base+MAC5);
 194
 195                 // Set VFS Node
 196                 card->Name[0] = '0'+i;
 197                 card->Name[1] = '\0';
 198                 card->Node.ImplPtr = card;
 199                 card->Node.NumACLs = 0;
 200                 card->Node.CTime = now();
 201                 card->Node.Write = RTL8139_Write;
 202                 card->Node.Read = RTL8139_Read;
 203                 card->Node.IOCtl = RTL8139_IOCtl;
 204
 205                 Log_Log("RTL8139", "Card %i 0x%04x, IRQ %i %02x:%02x:%02x:%02x:%02x:%02x",
 206                         i, card->IOBase, card->IRQ,
 207                         card->MacAddr[0], card->MacAddr[1], card->MacAddr[2],
 208                         card->MacAddr[3], card->MacAddr[4], card->MacAddr[5]
 209                         );
 210
 211                 i ++;
 212         }
 213
 214         gRTL8139_DriverInfo.RootNode.Size = giRTL8139_CardCount;
 215         DevFS_AddDevice( &gRTL8139_DriverInfo );
 216
 217         return MODULE_ERR_OK;
 218 }
 219
 220 // --- Root Functions ---
 221 char *RTL8139_ReadDir(tVFS_Node *Node, int Pos)
 222 {
 223         if( Pos < 0 || Pos >= giRTL8139_CardCount )     return NULL;
 224
 225         return strdup( gaRTL8139_Cards[Pos].Name );
 226 }
 227
 228 tVFS_Node *RTL8139_FindDir(tVFS_Node *Node, const char *Filename)
 229 {
 230         //TODO: It might be an idea to supprt >10 cards
 231         if(Filename[0] == '\0' || Filename[1] != '\0')  return NULL;
 232         if(Filename[0] < '0' || Filename[0] > '9')      return NULL;
 233         return &gaRTL8139_Cards[ Filename[0]-'0' ].Node;
 234 }
 235
 236 const char *csaRTL8139_RootIOCtls[] = {DRV_IOCTLNAMES, NULL};
 237 int RTL8139_RootIOCtl(tVFS_Node *Node, int ID, void *Data)
 238 {
 239         ENTER("pNode iID pData", Node, ID, Data);
 240         switch(ID)
 241         {
 242         BASE_IOCTLS(DRV_TYPE_NETWORK, "RTL8139", VERSION, csaRTL8139_RootIOCtls);
 243         }
 244         LEAVE('i', 0);
 245         return 0;
 246 }
 247
 248 // --- File Functions ---
 249 Uint64 RTL8139_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 250 {
 251         tCard   *card = Node->ImplPtr;
 252         Uint16  read_ofs, pkt_length;
 253          int    new_read_ofs;
 254
 255         ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
 256
 257 retry:
 258         if( Semaphore_Wait( &card->ReadSemaphore, 1 ) != 1 )
 259         {
 260                 LEAVE_RET('i', 0);
 261         }
 262
 263         Mutex_Acquire( &card->ReadMutex );
 264
 265         read_ofs = (inw( card->IOBase + CAPR ) + 0x10) & 0xFFFF;
 266         LOG("read_ofs = %i", read_ofs);
 267
 268         pkt_length = *(Uint16*)&card->ReceiveBuffer[read_ofs+2];
 269
 270         // Calculate new read offset
 271         new_read_ofs = read_ofs + pkt_length + 4;
 272         new_read_ofs = (new_read_ofs + 3) & ~3; // Align
 273         if(new_read_ofs > card->ReceiveBufferLength)    new_read_ofs = 0;
 274         new_read_ofs -= 0x10;   // I dunno
 275
 276         // Check for errors
 277         if( *(Uint16*)&card->ReceiveBuffer[read_ofs] & 0x1E ) {
 278                 // Update CAPR
 279                 outd(card->IOBase + CAPR, new_read_ofs);
 280                 Mutex_Release( &card->ReadMutex );
 281                 goto retry;     // I feel evil
 282         }
 283
 284         // Get packet
 285         if( Length > pkt_length )       Length = pkt_length;
 286         memcpy(Buffer, &card->ReceiveBuffer[read_ofs+4], Length);
 287
 288         // Update CAPR
 289         outw(card->IOBase + CAPR, new_read_ofs);
 290
 291         Mutex_Release( &card->ReadMutex );
 292
 293         LEAVE('i', Length);
 294
 295         return Length;
 296 }
 297
 298 Uint64 RTL8139_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
 299 {
 300          int    td;
 301         Uint32  status;
 302         tCard   *card = Node->ImplPtr;
 303
 304         if( Length > 1500 )     return 0;       // MTU exceeded
 305
 306         ENTER("pNode XLength pBuffer", Node, Length, Buffer);
 307
 308         // TODO: Implement a semaphore for avaliable transmit buffers
 309
 310         td = card->CurTXDecscriptor;
 311
 312         // Find an avaliable descriptor
 313         while( card->TransmitInUse & (1 << td) )
 314                 Threads_Yield();
 315
 316         LOG("td = %i", td);
 317
 318         // Transmit using descriptor `td`
 319         card->TransmitInUse |= (1 << td);
 320         outd(card->IOBase + TSAD0 + td*4, card->PhysTransmitBuffers[td]);
 321         LOG("card->PhysTransmitBuffers[td] = 0x%llx", card->PhysTransmitBuffers[td]);
 322         // Copy to buffer
 323         memcpy(card->TransmitBuffers[td], Buffer, Length);
 324         // Start
 325         status = 0;
 326         status |= Length & 0x1FFF;      // 0-12: Length
 327         status |= 0 << 13;      // 13: OWN bit
 328         status |= (0 & 0x3F) << 16;     // 16-21: Early TX threshold (zero atm, TODO: check)
 329         LOG("status = 0x%08x", status);
 330         outd(card->IOBase + TSD0 + td*4, status);
 331
 332         card->CurTXDecscriptor ++;
 333         card->CurTXDecscriptor %= 4;
 334
 335         LEAVE('i', (int)Length);
 336
 337         return Length;
 338 }
 339
 340 const char *csaRTL8139_NodeIOCtls[] = {DRV_IOCTLNAMES, NULL};
 341 int RTL8139_IOCtl(tVFS_Node *Node, int ID, void *Data)
 342 {
 343         tCard   *card = Node->ImplPtr;
 344         ENTER("pNode iID pData", Node, ID, Data);
 345         switch(ID)
 346         {
 347         BASE_IOCTLS(DRV_TYPE_NETWORK, "RTL8139", VERSION, csaRTL8139_NodeIOCtls);
 348         case NET_IOCTL_GETMAC:
 349                 if( !CheckMem(Data, 6) ) {
 350                         LEAVE('i', -1);
 351                         return -1;
 352                 }
 353                 memcpy( Data, card->MacAddr, 6 );
 354                 LEAVE('i', 1);
 355                 return 1;
 356         }
 357         LEAVE('i', 0);
 358         return 0;
 359 }
 360
 361 void RTL8139_IRQHandler(int Num)
 362 {
 363          int    i, j;
 364         tCard   *card;
 365         Uint16  status;
 366
 367         for( i = 0; i < giRTL8139_CardCount; i ++ )
 368         {
 369                 card = &gaRTL8139_Cards[i];
 370                 if( Num != card->IRQ )  break;
 371
 372                 status = inw(card->IOBase + ISR);
 373                 LOG("status = 0x%02x", status);
 374
 375                 // Transmit OK, a transmit descriptor is now free
 376                 if( status & FLAG_ISR_TOK )
 377                 {
 378                         for( j = 0; j < 4; j ++ )
 379                         {
 380                                 if( ind(card->IOBase + TSD0 + j*4) & 0x8000 ) { // TSD TOK
 381                                         card->TransmitInUse &= ~(1 << j);
 382                                         // TODO: Update semaphore once implemented
 383                                 }
 384                         }
 385                         outw(card->IOBase + ISR, FLAG_ISR_TOK);
 386                 }
 387
 388                 // Recieve OK, inform read
 389                 if( status & FLAG_ISR_ROK )
 390                 {
 391                          int    read_ofs, end_ofs;
 392                          int    packet_count = 0;
 393
 394                         // Scan recieve buffer for packets
 395                         end_ofs = inw(card->IOBase + CBA);
 396                         read_ofs = card->SeenOfs;
 397                         LOG("read_ofs = %i, end_ofs = %i", read_ofs, end_ofs);
 398                         if( read_ofs > end_ofs )
 399                         {
 400                                 while( read_ofs < card->ReceiveBufferLength )
 401                                 {
 402                                         packet_count ++;
 403                                         LOG("%i 0x%x Pkt Hdr: 0x%04x, len: 0x%04x",
 404                                                 packet_count, read_ofs,
 405                                                 *(Uint16*)&card->ReceiveBuffer[read_ofs],
 406                                                 *(Uint16*)&card->ReceiveBuffer[read_ofs+2]
 407                                                 );
 408                                         read_ofs += *(Uint16*)&card->ReceiveBuffer[read_ofs+2] + 4;
 409                                         read_ofs = (read_ofs + 3) & ~3; // Align
 410
 411                                 }
 412                                 read_ofs = 0;
 413                         }
 414                         while( read_ofs < end_ofs )
 415                         {
 416                                 LOG("%i 0x%x Pkt Hdr: 0x%04x, len: 0x%04x",
 417                                         packet_count, read_ofs,
 418                                         *(Uint16*)&card->ReceiveBuffer[read_ofs],
 419                                         *(Uint16*)&card->ReceiveBuffer[read_ofs+2]
 420                                         );
 421                                 packet_count ++;
 422                                 read_ofs += *(Uint16*)&card->ReceiveBuffer[read_ofs+2] + 4;
 423                                 read_ofs = (read_ofs + 3) & ~3; // Align
 424                         }
 425                         card->SeenOfs = read_ofs;
 426
 427                         LOG("packet_count = %i, read_ofs = 0x%x", packet_count, read_ofs);
 428
 429                         if( packet_count )
 430                         {
 431                                 if( Semaphore_Signal( &card->ReadSemaphore, packet_count ) != packet_count ) {
 432                                         // Oops?
 433                                 }
 434                                 VFS_MarkAvaliable( &card->Node, 1 );
 435                         }
 436
 437                         outw(card->IOBase + ISR, FLAG_ISR_ROK);
 438                 }
 439         }
 440 }