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1.1 ! root 1: /* pcnet32.c: An AMD PCnet32 ethernet driver for linux. */ ! 2: /* ! 3: * Copyright 1996,97 Thomas Bogendoerfer, 1993-1995,1998 Donald Becker ! 4: * Copyright 1993 United States Government as represented by the ! 5: * Director, National Security Agency. ! 6: * ! 7: * Derived from the lance driver written 1993-1995 by Donald Becker. ! 8: * ! 9: * This software may be used and distributed according to the terms ! 10: * of the GNU Public License, incorporated herein by reference. ! 11: * ! 12: * This driver is for AMD PCnet-PCI based ethercards ! 13: */ ! 14: ! 15: static const char *version = "pcnet32.c:v0.99B 4/4/98 DJBecker/TSBogend.\n"; ! 16: ! 17: /* A few user-configurable values. */ ! 18: ! 19: /* Maximum events (Rx packets, etc.) to handle at each interrupt. */ ! 20: static int max_interrupt_work = 20; ! 21: ! 22: /* ! 23: * Set the number of Tx and Rx buffers, using Log_2(# buffers). ! 24: * Reasonable default values are 4 Tx buffers, and 16 Rx buffers. ! 25: * That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4). ! 26: */ ! 27: #define PCNET_LOG_TX_BUFFERS 4 ! 28: #define PCNET_LOG_RX_BUFFERS 4 ! 29: ! 30: #ifdef MODULE ! 31: #ifdef MODVERSIONS ! 32: #include <linux/modversions.h> ! 33: #endif ! 34: #include <linux/module.h> ! 35: #include <linux/version.h> ! 36: #else ! 37: #define MOD_INC_USE_COUNT ! 38: #define MOD_DEC_USE_COUNT ! 39: #endif ! 40: ! 41: #include <linux/kernel.h> ! 42: #include <linux/sched.h> ! 43: #include <linux/string.h> ! 44: #include <linux/ptrace.h> ! 45: #include <linux/errno.h> ! 46: #include <linux/ioport.h> ! 47: #include <linux/malloc.h> ! 48: #include <linux/interrupt.h> ! 49: #include <linux/pci.h> ! 50: #include <linux/bios32.h> ! 51: #include <asm/bitops.h> ! 52: #include <asm/io.h> ! 53: #include <asm/dma.h> ! 54: ! 55: #include <linux/netdevice.h> ! 56: #include <linux/etherdevice.h> ! 57: #include <linux/skbuff.h> ! 58: ! 59: /* Driver verbosity level. 0 = no messages, 7 = wordy death. ! 60: Modify here, or when loading as a module. */ ! 61: static int pcnet32_debug = 1; ! 62: ! 63: /* ! 64: * Theory of Operation ! 65: * ! 66: * This driver uses the same software structure as the normal lance ! 67: * driver. So look for a verbose description in lance.c. The differences ! 68: * to the normal lance driver is the use of the 32bit mode of PCnet32 ! 69: * and PCnetPCI chips. Because these chips are 32bit chips, there is no ! 70: * 16MB limitation and we don't need bounce buffers. ! 71: */ ! 72: ! 73: /* ! 74: * History: ! 75: * v0.01: Initial version ! 76: * only tested on Alpha Noname Board ! 77: * v0.02: changed IRQ handling for new interrupt scheme (dev_id) ! 78: * tested on a ASUS SP3G ! 79: * v0.10: fixed an odd problem with the 79C794 in a Compaq Deskpro XL ! 80: * looks like the 974 doesn't like stopping and restarting in a ! 81: * short period of time; now we do a reinit of the lance; the ! 82: * bug was triggered by doing ifconfig eth0 <ip> broadcast <addr> ! 83: * and hangs the machine (thanks to Klaus Liedl for debugging) ! 84: * v0.12: by suggestion from Donald Becker: Renamed driver to pcnet32, ! 85: * made it standalone (no need for lance.c) ! 86: * v0.13: added additional PCI detecting for special PCI devices (Compaq) ! 87: * v0.14: stripped down additional PCI probe (thanks to David C Niemi ! 88: * and [email protected] for testing this on their Compaq boxes) ! 89: * v0.15: added 79C965 (VLB) probe ! 90: * added interrupt sharing for PCI chips ! 91: * v0.16: fixed set_multicast_list on Alpha machines ! 92: * v0.17: removed hack from dev.c; now pcnet32 uses ethif_probe in Space.c ! 93: * v0.19: changed setting of autoselect bit ! 94: * v0.20: removed additional Compaq PCI probe; there is now a working one ! 95: * in arch/i386/bios32.c ! 96: * v0.21: added endian conversion for ppc, from work by [email protected] ! 97: * v0.22: added printing of status to ring dump ! 98: * v0.23: changed enet_statistics to net_devive_stats ! 99: * v0.99: Changes for 2.0.34 final release. -djb ! 100: */ ! 101: ! 102: ! 103: #ifndef __powerpc__ ! 104: #define le16_to_cpu(val) (val) ! 105: #define le32_to_cpu(val) (val) ! 106: #endif ! 107: #if (LINUX_VERSION_CODE < 0x20123) ! 108: #define test_and_set_bit(val, addr) set_bit(val, addr) ! 109: #endif ! 110: ! 111: #define TX_RING_SIZE (1 << (PCNET_LOG_TX_BUFFERS)) ! 112: #define TX_RING_MOD_MASK (TX_RING_SIZE - 1) ! 113: #define TX_RING_LEN_BITS ((PCNET_LOG_TX_BUFFERS) << 12) ! 114: ! 115: #define RX_RING_SIZE (1 << (PCNET_LOG_RX_BUFFERS)) ! 116: #define RX_RING_MOD_MASK (RX_RING_SIZE - 1) ! 117: #define RX_RING_LEN_BITS ((PCNET_LOG_RX_BUFFERS) << 4) ! 118: ! 119: #define PKT_BUF_SZ 1544 ! 120: ! 121: /* Offsets from base I/O address. */ ! 122: enum pcnet_offsets { PCNET32_DATA=0x10, PCNET32_ADDR=0x12, PCNET32_RESET=0x14, ! 123: PCNET32_BUS_IF=0x16,}; ! 124: #define PCNET32_TOTAL_SIZE 0x20 ! 125: ! 126: /* The PCNET32 Rx and Tx ring descriptors. */ ! 127: struct pcnet32_rx_head { ! 128: u32 base; ! 129: s16 buf_length; ! 130: s16 status; ! 131: u32 msg_length; ! 132: u32 reserved; ! 133: }; ! 134: ! 135: struct pcnet32_tx_head { ! 136: u32 base; ! 137: s16 length; ! 138: s16 status; ! 139: u32 misc; ! 140: u32 reserved; ! 141: }; ! 142: ! 143: /* The PCNET32 32-Bit initialization block, described in databook. */ ! 144: struct pcnet32_init_block { ! 145: u16 mode; ! 146: u16 tlen_rlen; ! 147: u8 phys_addr[6]; ! 148: u16 reserved; ! 149: u32 filter[2]; ! 150: /* Receive and transmit ring base, along with extra bits. */ ! 151: u32 rx_ring; ! 152: u32 tx_ring; ! 153: }; ! 154: ! 155: struct pcnet32_private { ! 156: /* The Tx and Rx ring entries must be aligned on 16-byte boundaries ! 157: in 32bit mode. */ ! 158: struct pcnet32_rx_head rx_ring[RX_RING_SIZE]; ! 159: struct pcnet32_tx_head tx_ring[TX_RING_SIZE]; ! 160: struct pcnet32_init_block init_block; ! 161: const char *name; ! 162: struct device *next_module; ! 163: /* The saved address of a sent-in-place packet/buffer, for skfree(). */ ! 164: struct sk_buff* tx_skbuff[TX_RING_SIZE]; ! 165: unsigned long rx_buffs; /* Address of Rx and Tx buffers. */ ! 166: int cur_rx, cur_tx; /* The next free ring entry */ ! 167: int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */ ! 168: struct enet_statistics stats; ! 169: char tx_full; ! 170: unsigned long lock; ! 171: }; ! 172: ! 173: static struct pcnet_chip_type { ! 174: int id_number; ! 175: const char *name; ! 176: int flags; ! 177: } chip_table[] = { ! 178: {0x2420, "PCnet/PCI 79C970", 0}, ! 179: {0x2430, "PCnet32", 0}, ! 180: {0x2621, "PCnet/PCI II 79C970A", 0}, ! 181: {0x2623, "PCnet/FAST 79C971", 0}, ! 182: {0x2624, "PCnet/FAST+ 79C972", 0}, ! 183: {0x0, "PCnet32 (unknown)", 0}, ! 184: }; ! 185: ! 186: /* Index of functions. */ ! 187: int pcnet32_probe(struct device *dev); ! 188: static int pcnet32_probe1(struct device *dev, unsigned int ioaddr, unsigned char irq_line); ! 189: static int pcnet32_open(struct device *dev); ! 190: static void pcnet32_init_ring(struct device *dev); ! 191: static int pcnet32_start_xmit(struct sk_buff *skb, struct device *dev); ! 192: static int pcnet32_rx(struct device *dev); ! 193: static void pcnet32_interrupt(int irq, void *dev_id, struct pt_regs *regs); ! 194: static int pcnet32_close(struct device *dev); ! 195: static struct enet_statistics *pcnet32_get_stats(struct device *dev); ! 196: static void pcnet32_set_multicast_list(struct device *dev); ! 197: ! 198: ! 199: /* A list of all installed PCnet32 devices, for removing the driver module. */ ! 200: static struct device *root_pcnet32_dev = NULL; ! 201: ! 202: int pcnet32_probe (struct device *dev) ! 203: { ! 204: static int pci_index = 0; /* Static, for multiple probe calls. */ ! 205: int cards_found = 0; ! 206: ! 207: if ( ! pcibios_present()) ! 208: return ENODEV; ! 209: ! 210: for (;pci_index < 0xff; pci_index++) { ! 211: u8 irq_line; ! 212: u16 pci_command, new_command; ! 213: unsigned char pci_bus, pci_device_fn; ! 214: u32 pci_ioaddr; ! 215: ! 216: if (pcibios_find_device (PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE, ! 217: pci_index, &pci_bus, &pci_device_fn) ! 218: != PCIBIOS_SUCCESSFUL) ! 219: break; ! 220: ! 221: pcibios_read_config_byte(pci_bus, pci_device_fn, ! 222: PCI_INTERRUPT_LINE, &irq_line); ! 223: pcibios_read_config_dword(pci_bus, pci_device_fn, ! 224: PCI_BASE_ADDRESS_0, &pci_ioaddr); ! 225: /* Remove I/O space marker in bit 0. */ ! 226: pci_ioaddr &= ~3; ! 227: ! 228: /* Avoid already found cards from previous pcnet32_probe() calls */ ! 229: if (check_region(pci_ioaddr, PCNET32_TOTAL_SIZE)) ! 230: continue; ! 231: ! 232: /* Activate the card: fix for brain-damaged Win98 BIOSes. */ ! 233: pcibios_read_config_word(pci_bus, pci_device_fn, ! 234: PCI_COMMAND, &pci_command); ! 235: new_command = pci_command | PCI_COMMAND_MASTER|PCI_COMMAND_IO; ! 236: if (pci_command != new_command) { ! 237: printk(KERN_INFO " The PCI BIOS has not enabled the AMD Ethernet" ! 238: " device at %2x-%2x." ! 239: " Updating PCI command %4.4x->%4.4x.\n", ! 240: pci_bus, pci_device_fn, pci_command, new_command); ! 241: pcibios_write_config_word(pci_bus, pci_device_fn, ! 242: PCI_COMMAND, new_command); ! 243: } ! 244: ! 245: if (pcnet32_probe1(dev, pci_ioaddr, irq_line) != 0) { ! 246: /* Should never happen. */ ! 247: printk(KERN_ERR "pcnet32.c: Probe of PCI card at %#x failed.\n", ! 248: pci_ioaddr); ! 249: } else ! 250: dev = 0; ! 251: cards_found++; ! 252: } ! 253: ! 254: return cards_found ? 0 : -ENODEV; ! 255: } ! 256: ! 257: ! 258: /* pcnet32_probe1 */ ! 259: static int pcnet32_probe1(struct device *dev, unsigned int ioaddr, unsigned char irq_line) ! 260: { ! 261: struct pcnet32_private *lp; ! 262: int i; ! 263: const char *chipname; ! 264: ! 265: /* check if there is really a pcnet chip on that ioaddr */ ! 266: if ((inb(ioaddr + 14) != 0x57) || (inb(ioaddr + 15) != 0x57)) ! 267: return ENODEV; ! 268: ! 269: inw(ioaddr+PCNET32_RESET); /* Reset the PCNET32 */ ! 270: ! 271: outw(0x0000, ioaddr+PCNET32_ADDR); /* Switch to window 0 */ ! 272: if (inw(ioaddr+PCNET32_DATA) != 0x0004) ! 273: return ENODEV; ! 274: ! 275: /* Get the version of the chip. */ ! 276: outw(88, ioaddr+PCNET32_ADDR); ! 277: if (inw(ioaddr+PCNET32_ADDR) != 88) { ! 278: /* should never happen */ ! 279: return ENODEV; ! 280: } else { /* Good, it's a newer chip. */ ! 281: int chip_version = inw(ioaddr+PCNET32_DATA); ! 282: outw(89, ioaddr+PCNET32_ADDR); ! 283: chip_version |= inw(ioaddr+PCNET32_DATA) << 16; ! 284: if (pcnet32_debug > 2) ! 285: printk(" PCnet chip version is %#x.\n", chip_version); ! 286: if ((chip_version & 0xfff) != 0x003) ! 287: return ENODEV; ! 288: chip_version = (chip_version >> 12) & 0xffff; ! 289: for (i = 0; chip_table[i].id_number; i++) ! 290: if (chip_table[i].id_number == chip_version) ! 291: break; ! 292: chipname = chip_table[i].name; ! 293: } ! 294: ! 295: dev = init_etherdev(dev, 0); ! 296: ! 297: printk("%s: %s at %#3x,", dev->name, chipname, ioaddr); ! 298: ! 299: /* There is a 16 byte station address PROM at the base address. ! 300: The first six bytes are the station address. */ ! 301: for (i = 0; i < 6; i++) ! 302: printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i)); ! 303: ! 304: printk("\n"); ! 305: ! 306: dev->base_addr = ioaddr; ! 307: request_region(ioaddr, PCNET32_TOTAL_SIZE, dev->name); ! 308: ! 309: /* Data structures used by the PCnet32 are 16byte aligned and DMAble. */ ! 310: lp = (struct pcnet32_private *) ! 311: (((unsigned long)kmalloc(sizeof(*lp)+15, GFP_DMA | GFP_KERNEL)+15) & ~15); ! 312: ! 313: memset(lp, 0, sizeof(*lp)); ! 314: dev->priv = lp; ! 315: ! 316: lp->next_module = root_pcnet32_dev; ! 317: root_pcnet32_dev = dev; ! 318: ! 319: lp->name = chipname; ! 320: lp->rx_buffs = (unsigned long) kmalloc(PKT_BUF_SZ*RX_RING_SIZE, GFP_DMA | GFP_KERNEL); ! 321: ! 322: lp->init_block.mode = le16_to_cpu(0x0003); /* Disable Rx and Tx. */ ! 323: lp->init_block.tlen_rlen = le16_to_cpu(TX_RING_LEN_BITS | RX_RING_LEN_BITS); ! 324: for (i = 0; i < 6; i++) ! 325: lp->init_block.phys_addr[i] = dev->dev_addr[i]; ! 326: lp->init_block.filter[0] = 0x00000000; ! 327: lp->init_block.filter[1] = 0x00000000; ! 328: lp->init_block.rx_ring = (u32)le32_to_cpu(virt_to_bus(lp->rx_ring)); ! 329: lp->init_block.tx_ring = (u32)le32_to_cpu(virt_to_bus(lp->tx_ring)); ! 330: ! 331: /* switch pcnet32 to 32bit mode */ ! 332: outw(0x0014, ioaddr+PCNET32_ADDR); ! 333: outw(0x0002, ioaddr+PCNET32_BUS_IF); ! 334: ! 335: outw(0x0001, ioaddr+PCNET32_ADDR); ! 336: inw(ioaddr+PCNET32_ADDR); ! 337: outw(virt_to_bus(&lp->init_block) & 0xffff, ioaddr+PCNET32_DATA); ! 338: outw(0x0002, ioaddr+PCNET32_ADDR); ! 339: inw(ioaddr+PCNET32_ADDR); ! 340: outw(virt_to_bus(&lp->init_block) >> 16, ioaddr+PCNET32_DATA); ! 341: outw(0x0000, ioaddr+PCNET32_ADDR); ! 342: inw(ioaddr+PCNET32_ADDR); ! 343: ! 344: dev->irq = irq_line; ! 345: ! 346: if (pcnet32_debug > 0) ! 347: printk(version); ! 348: ! 349: /* The PCNET32-specific entries in the device structure. */ ! 350: dev->open = &pcnet32_open; ! 351: dev->hard_start_xmit = &pcnet32_start_xmit; ! 352: dev->stop = &pcnet32_close; ! 353: dev->get_stats = &pcnet32_get_stats; ! 354: dev->set_multicast_list = &pcnet32_set_multicast_list; ! 355: ! 356: /* Fill in the generic fields of the device structure. */ ! 357: ether_setup(dev); ! 358: return 0; ! 359: } ! 360: ! 361: ! 362: static int ! 363: pcnet32_open(struct device *dev) ! 364: { ! 365: struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; ! 366: unsigned int ioaddr = dev->base_addr; ! 367: int i; ! 368: ! 369: if (dev->irq == 0 || ! 370: request_irq(dev->irq, &pcnet32_interrupt, SA_SHIRQ, ! 371: dev->name, (void *)dev)) { ! 372: return -EAGAIN; ! 373: } ! 374: MOD_INC_USE_COUNT; ! 375: ! 376: /* Reset the PCNET32 */ ! 377: inw(ioaddr+PCNET32_RESET); ! 378: ! 379: /* switch pcnet32 to 32bit mode */ ! 380: outw(0x0014, ioaddr+PCNET32_ADDR); ! 381: outw(0x0002, ioaddr+PCNET32_BUS_IF); ! 382: ! 383: /* Turn on auto-select of media (AUI, BNC). */ ! 384: outw(0x0002, ioaddr+PCNET32_ADDR); ! 385: /* only touch autoselect bit */ ! 386: outw(inw(ioaddr+PCNET32_BUS_IF) | 0x0002, ioaddr+PCNET32_BUS_IF); ! 387: ! 388: if (pcnet32_debug > 1) ! 389: printk("%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.\n", ! 390: dev->name, dev->irq, ! 391: (u32) virt_to_bus(lp->tx_ring), ! 392: (u32) virt_to_bus(lp->rx_ring), ! 393: (u32) virt_to_bus(&lp->init_block)); ! 394: ! 395: /* check for ATLAS T1/E1 LAW card */ ! 396: if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0 && dev->dev_addr[2] == 0x75) { ! 397: /* select GPSI mode */ ! 398: lp->init_block.mode = 0x0100; ! 399: outw(0x0002, ioaddr+PCNET32_ADDR); ! 400: outw(inw(ioaddr+PCNET32_BUS_IF) & ~2, ioaddr+PCNET32_BUS_IF); ! 401: /* switch full duplex on */ ! 402: outw(0x0009, ioaddr+PCNET32_ADDR); ! 403: outw(inw(ioaddr+PCNET32_BUS_IF) | 1, ioaddr+PCNET32_BUS_IF); ! 404: } else ! 405: lp->init_block.mode = 0x0000; ! 406: lp->init_block.filter[0] = 0x00000000; ! 407: lp->init_block.filter[1] = 0x00000000; ! 408: pcnet32_init_ring(dev); ! 409: ! 410: /* Re-initialize the PCNET32, and start it when done. */ ! 411: outw(0x0001, ioaddr+PCNET32_ADDR); ! 412: outw(virt_to_bus(&lp->init_block) &0xffff, ioaddr+PCNET32_DATA); ! 413: outw(0x0002, ioaddr+PCNET32_ADDR); ! 414: outw(virt_to_bus(&lp->init_block) >> 16, ioaddr+PCNET32_DATA); ! 415: ! 416: outw(0x0004, ioaddr+PCNET32_ADDR); ! 417: outw(0x0915, ioaddr+PCNET32_DATA); ! 418: ! 419: outw(0x0000, ioaddr+PCNET32_ADDR); ! 420: outw(0x0001, ioaddr+PCNET32_DATA); ! 421: ! 422: dev->tbusy = 0; ! 423: dev->interrupt = 0; ! 424: dev->start = 1; ! 425: i = 0; ! 426: while (i++ < 100) ! 427: if (inw(ioaddr+PCNET32_DATA) & 0x0100) ! 428: break; ! 429: /* ! 430: * We used to clear the InitDone bit, 0x0100, here but Mark Stockton ! 431: * reports that doing so triggers a bug in the '974. ! 432: */ ! 433: outw(0x0042, ioaddr+PCNET32_DATA); ! 434: ! 435: if (pcnet32_debug > 2) ! 436: printk("%s: PCNET32 open after %d ticks, init block %#x csr0 %4.4x.\n", ! 437: dev->name, i, (u32) virt_to_bus(&lp->init_block), inw(ioaddr+PCNET32_DATA)); ! 438: ! 439: return 0; /* Always succeed */ ! 440: } ! 441: ! 442: /* ! 443: * The LANCE has been halted for one reason or another (busmaster memory ! 444: * arbitration error, Tx FIFO underflow, driver stopped it to reconfigure, ! 445: * etc.). Modern LANCE variants always reload their ring-buffer ! 446: * configuration when restarted, so we must reinitialize our ring ! 447: * context before restarting. As part of this reinitialization, ! 448: * find all packets still on the Tx ring and pretend that they had been ! 449: * sent (in effect, drop the packets on the floor) - the higher-level ! 450: * protocols will time out and retransmit. It'd be better to shuffle ! 451: * these skbs to a temp list and then actually re-Tx them after ! 452: * restarting the chip, but I'm too lazy to do so right now. [email protected] ! 453: */ ! 454: ! 455: static void ! 456: pcnet32_purge_tx_ring(struct device *dev) ! 457: { ! 458: struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; ! 459: int i; ! 460: ! 461: for (i = 0; i < TX_RING_SIZE; i++) { ! 462: if (lp->tx_skbuff[i]) { ! 463: dev_kfree_skb(lp->tx_skbuff[i], FREE_WRITE); ! 464: lp->tx_skbuff[i] = NULL; ! 465: } ! 466: } ! 467: } ! 468: ! 469: ! 470: /* Initialize the PCNET32 Rx and Tx rings. */ ! 471: static void ! 472: pcnet32_init_ring(struct device *dev) ! 473: { ! 474: struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; ! 475: int i; ! 476: ! 477: lp->lock = 0, lp->tx_full = 0; ! 478: lp->cur_rx = lp->cur_tx = 0; ! 479: lp->dirty_rx = lp->dirty_tx = 0; ! 480: ! 481: for (i = 0; i < RX_RING_SIZE; i++) { ! 482: lp->rx_ring[i].base = (u32)le32_to_cpu(virt_to_bus((char *)lp->rx_buffs + i*PKT_BUF_SZ)); ! 483: lp->rx_ring[i].buf_length = le16_to_cpu(-PKT_BUF_SZ); ! 484: lp->rx_ring[i].status = le16_to_cpu(0x8000); ! 485: } ! 486: /* The Tx buffer address is filled in as needed, but we do need to clear ! 487: the upper ownership bit. */ ! 488: for (i = 0; i < TX_RING_SIZE; i++) { ! 489: lp->tx_ring[i].base = 0; ! 490: lp->tx_ring[i].status = 0; ! 491: } ! 492: ! 493: lp->init_block.tlen_rlen = TX_RING_LEN_BITS | RX_RING_LEN_BITS; ! 494: for (i = 0; i < 6; i++) ! 495: lp->init_block.phys_addr[i] = dev->dev_addr[i]; ! 496: lp->init_block.rx_ring = (u32)le32_to_cpu(virt_to_bus(lp->rx_ring)); ! 497: lp->init_block.tx_ring = (u32)le32_to_cpu(virt_to_bus(lp->tx_ring)); ! 498: } ! 499: ! 500: static void ! 501: pcnet32_restart(struct device *dev, unsigned int csr0_bits, int must_reinit) ! 502: { ! 503: int i; ! 504: unsigned int ioaddr = dev->base_addr; ! 505: ! 506: pcnet32_purge_tx_ring(dev); ! 507: pcnet32_init_ring(dev); ! 508: ! 509: outw(0x0000, ioaddr + PCNET32_ADDR); ! 510: /* ReInit Ring */ ! 511: outw(0x0001, ioaddr + PCNET32_DATA); ! 512: i = 0; ! 513: while (i++ < 100) ! 514: if (inw(ioaddr+PCNET32_DATA) & 0x0100) ! 515: break; ! 516: ! 517: outw(csr0_bits, ioaddr + PCNET32_DATA); ! 518: } ! 519: ! 520: static int ! 521: pcnet32_start_xmit(struct sk_buff *skb, struct device *dev) ! 522: { ! 523: struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; ! 524: unsigned int ioaddr = dev->base_addr; ! 525: int entry; ! 526: unsigned long flags; ! 527: ! 528: /* Transmitter timeout, serious problems. */ ! 529: if (dev->tbusy) { ! 530: int tickssofar = jiffies - dev->trans_start; ! 531: if (tickssofar < 20) ! 532: return 1; ! 533: outw(0, ioaddr+PCNET32_ADDR); ! 534: printk("%s: transmit timed out, status %4.4x, resetting.\n", ! 535: dev->name, inw(ioaddr+PCNET32_DATA)); ! 536: outw(0x0004, ioaddr+PCNET32_DATA); ! 537: lp->stats.tx_errors++; ! 538: #ifndef final_version ! 539: { ! 540: int i; ! 541: printk(" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.", ! 542: lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "", ! 543: lp->cur_rx); ! 544: for (i = 0 ; i < RX_RING_SIZE; i++) ! 545: printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ", ! 546: lp->rx_ring[i].base, -lp->rx_ring[i].buf_length, ! 547: lp->rx_ring[i].msg_length, (unsigned)lp->rx_ring[i].status); ! 548: for (i = 0 ; i < TX_RING_SIZE; i++) ! 549: printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ", ! 550: lp->tx_ring[i].base, -lp->tx_ring[i].length, ! 551: lp->tx_ring[i].misc, (unsigned)lp->tx_ring[i].status); ! 552: printk("\n"); ! 553: } ! 554: #endif ! 555: pcnet32_restart(dev, 0x0042, 1); ! 556: ! 557: dev->tbusy = 0; ! 558: dev->trans_start = jiffies; ! 559: ! 560: return 0; ! 561: } ! 562: ! 563: if (pcnet32_debug > 3) { ! 564: outw(0x0000, ioaddr+PCNET32_ADDR); ! 565: printk("%s: pcnet32_start_xmit() called, csr0 %4.4x.\n", dev->name, ! 566: inw(ioaddr+PCNET32_DATA)); ! 567: outw(0x0000, ioaddr+PCNET32_DATA); ! 568: } ! 569: ! 570: /* Block a timer-based transmit from overlapping. This could better be ! 571: done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */ ! 572: if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) { ! 573: printk("%s: Transmitter access conflict.\n", dev->name); ! 574: return 1; ! 575: } ! 576: ! 577: if (test_and_set_bit(0, (void*)&lp->lock) != 0) { ! 578: if (pcnet32_debug > 0) ! 579: printk("%s: tx queue lock!.\n", dev->name); ! 580: /* don't clear dev->tbusy flag. */ ! 581: return 1; ! 582: } ! 583: ! 584: /* Fill in a Tx ring entry */ ! 585: ! 586: /* Mask to ring buffer boundary. */ ! 587: entry = lp->cur_tx & TX_RING_MOD_MASK; ! 588: ! 589: /* Caution: the write order is important here, set the base address ! 590: with the "ownership" bits last. */ ! 591: ! 592: lp->tx_ring[entry].length = le16_to_cpu(-skb->len); ! 593: ! 594: lp->tx_ring[entry].misc = 0x00000000; ! 595: ! 596: lp->tx_skbuff[entry] = skb; ! 597: lp->tx_ring[entry].base = (u32)le32_to_cpu(virt_to_bus(skb->data)); ! 598: lp->tx_ring[entry].status = le16_to_cpu(0x8300); ! 599: ! 600: lp->cur_tx++; ! 601: ! 602: /* Trigger an immediate send poll. */ ! 603: outw(0x0000, ioaddr+PCNET32_ADDR); ! 604: outw(0x0048, ioaddr+PCNET32_DATA); ! 605: ! 606: dev->trans_start = jiffies; ! 607: ! 608: save_flags(flags); ! 609: cli(); ! 610: lp->lock = 0; ! 611: if (lp->tx_ring[(entry+1) & TX_RING_MOD_MASK].base == 0) ! 612: clear_bit(0, (void*)&dev->tbusy); ! 613: else ! 614: lp->tx_full = 1; ! 615: restore_flags(flags); ! 616: ! 617: return 0; ! 618: } ! 619: ! 620: /* The PCNET32 interrupt handler. */ ! 621: static void ! 622: pcnet32_interrupt(int irq, void *dev_id, struct pt_regs * regs) ! 623: { ! 624: struct device *dev = (struct device *)dev_id; ! 625: struct pcnet32_private *lp; ! 626: unsigned int csr0, ioaddr; ! 627: int boguscnt = max_interrupt_work; ! 628: int must_restart; ! 629: ! 630: if (dev == NULL) { ! 631: printk ("pcnet32_interrupt(): irq %d for unknown device.\n", irq); ! 632: return; ! 633: } ! 634: ! 635: ioaddr = dev->base_addr; ! 636: lp = (struct pcnet32_private *)dev->priv; ! 637: if (dev->interrupt) ! 638: printk("%s: Re-entering the interrupt handler.\n", dev->name); ! 639: ! 640: dev->interrupt = 1; ! 641: ! 642: outw(0x00, dev->base_addr + PCNET32_ADDR); ! 643: while ((csr0 = inw(dev->base_addr + PCNET32_DATA)) & 0x8600 ! 644: && --boguscnt >= 0) { ! 645: /* Acknowledge all of the current interrupt sources ASAP. */ ! 646: outw(csr0 & ~0x004f, dev->base_addr + PCNET32_DATA); ! 647: ! 648: must_restart = 0; ! 649: ! 650: if (pcnet32_debug > 5) ! 651: printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n", ! 652: dev->name, csr0, inw(dev->base_addr + PCNET32_DATA)); ! 653: ! 654: if (csr0 & 0x0400) /* Rx interrupt */ ! 655: pcnet32_rx(dev); ! 656: ! 657: if (csr0 & 0x0200) { /* Tx-done interrupt */ ! 658: int dirty_tx = lp->dirty_tx; ! 659: ! 660: while (dirty_tx < lp->cur_tx) { ! 661: int entry = dirty_tx & TX_RING_MOD_MASK; ! 662: int status = (short)le16_to_cpu(lp->tx_ring[entry].status); ! 663: ! 664: if (status < 0) ! 665: break; /* It still hasn't been Txed */ ! 666: ! 667: lp->tx_ring[entry].base = 0; ! 668: ! 669: if (status & 0x4000) { ! 670: /* There was an major error, log it. */ ! 671: int err_status = le16_to_cpu(lp->tx_ring[entry].misc); ! 672: lp->stats.tx_errors++; ! 673: if (err_status & 0x04000000) lp->stats.tx_aborted_errors++; ! 674: if (err_status & 0x08000000) lp->stats.tx_carrier_errors++; ! 675: if (err_status & 0x10000000) lp->stats.tx_window_errors++; ! 676: if (err_status & 0x40000000) { ! 677: /* Ackk! On FIFO errors the Tx unit is turned off! */ ! 678: lp->stats.tx_fifo_errors++; ! 679: /* Remove this verbosity later! */ ! 680: printk("%s: Tx FIFO error! Status %4.4x.\n", ! 681: dev->name, csr0); ! 682: /* Restart the chip. */ ! 683: must_restart = 1; ! 684: } ! 685: } else { ! 686: if (status & 0x1800) ! 687: lp->stats.collisions++; ! 688: lp->stats.tx_packets++; ! 689: } ! 690: ! 691: /* We must free the original skb */ ! 692: if (lp->tx_skbuff[entry]) { ! 693: dev_kfree_skb(lp->tx_skbuff[entry], FREE_WRITE); ! 694: lp->tx_skbuff[entry] = 0; ! 695: } ! 696: dirty_tx++; ! 697: } ! 698: ! 699: #ifndef final_version ! 700: if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) { ! 701: printk("out-of-sync dirty pointer, %d vs. %d, full=%d.\n", ! 702: dirty_tx, lp->cur_tx, lp->tx_full); ! 703: dirty_tx += TX_RING_SIZE; ! 704: } ! 705: #endif ! 706: ! 707: if (lp->tx_full && dev->tbusy ! 708: && dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) { ! 709: /* The ring is no longer full, clear tbusy. */ ! 710: lp->tx_full = 0; ! 711: clear_bit(0, (void*)&dev->tbusy); ! 712: mark_bh(NET_BH); ! 713: } ! 714: ! 715: lp->dirty_tx = dirty_tx; ! 716: } ! 717: ! 718: /* Log misc errors. */ ! 719: if (csr0 & 0x4000) lp->stats.tx_errors++; /* Tx babble. */ ! 720: if (csr0 & 0x1000) { ! 721: /* ! 722: * this happens when our receive ring is full. This ! 723: * shouldn't be a problem as we will see normal rx ! 724: * interrupts for the frames in the receive ring. But ! 725: * there are some PCI chipsets (I can reproduce this ! 726: * on SP3G with Intel saturn chipset) which have some- ! 727: * times problems and will fill up the receive ring ! 728: * with error descriptors. In this situation we don't ! 729: * get a rx interrupt, but a missed frame interrupt ! 730: * sooner or later. So we try to clean up our receive ! 731: * ring here. ! 732: */ ! 733: pcnet32_rx(dev); ! 734: lp->stats.rx_errors++; /* Missed a Rx frame. */ ! 735: } ! 736: if (csr0 & 0x0800) { ! 737: printk("%s: Bus master arbitration failure, status %4.4x.\n", ! 738: dev->name, csr0); ! 739: /* Restart the chip. */ ! 740: must_restart = 1; ! 741: } ! 742: ! 743: if (must_restart) { ! 744: /* stop the chip to clear the error condition, then restart */ ! 745: outw(0x0000, dev->base_addr + PCNET32_ADDR); ! 746: outw(0x0004, dev->base_addr + PCNET32_DATA); ! 747: pcnet32_restart(dev, 0x0002, 0); ! 748: } ! 749: } ! 750: ! 751: /* Clear any other interrupt, and set interrupt enable. */ ! 752: outw(0x0000, dev->base_addr + PCNET32_ADDR); ! 753: outw(0x7940, dev->base_addr + PCNET32_DATA); ! 754: ! 755: if (pcnet32_debug > 4) ! 756: printk("%s: exiting interrupt, csr%d=%#4.4x.\n", ! 757: dev->name, inw(ioaddr + PCNET32_ADDR), ! 758: inw(dev->base_addr + PCNET32_DATA)); ! 759: ! 760: dev->interrupt = 0; ! 761: return; ! 762: } ! 763: ! 764: static int ! 765: pcnet32_rx(struct device *dev) ! 766: { ! 767: struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; ! 768: int entry = lp->cur_rx & RX_RING_MOD_MASK; ! 769: int i; ! 770: ! 771: /* If we own the next entry, it's a new packet. Send it up. */ ! 772: while ((short)le16_to_cpu(lp->rx_ring[entry].status) >= 0) { ! 773: int status = (short)le16_to_cpu(lp->rx_ring[entry].status) >> 8; ! 774: ! 775: if (status != 0x03) { /* There was an error. */ ! 776: /* There is a tricky error noted by John Murphy, ! 777: <[email protected]> to Russ Nelson: Even with full-sized ! 778: buffers it's possible for a jabber packet to use two ! 779: buffers, with only the last correctly noting the error. */ ! 780: if (status & 0x01) /* Only count a general error at the */ ! 781: lp->stats.rx_errors++; /* end of a packet.*/ ! 782: if (status & 0x20) lp->stats.rx_frame_errors++; ! 783: if (status & 0x10) lp->stats.rx_over_errors++; ! 784: if (status & 0x08) lp->stats.rx_crc_errors++; ! 785: if (status & 0x04) lp->stats.rx_fifo_errors++; ! 786: lp->rx_ring[entry].status &= le16_to_cpu(0x03ff); ! 787: } ! 788: else ! 789: { ! 790: /* Malloc up new buffer, compatible with net-2e. */ ! 791: short pkt_len = (le32_to_cpu(lp->rx_ring[entry].msg_length) & 0xfff)-4; ! 792: struct sk_buff *skb; ! 793: ! 794: if(pkt_len < 60) { ! 795: printk("%s: Runt packet!\n",dev->name); ! 796: lp->stats.rx_errors++; ! 797: } else { ! 798: skb = dev_alloc_skb(pkt_len+2); ! 799: if (skb == NULL) { ! 800: printk("%s: Memory squeeze, deferring packet.\n", ! 801: dev->name); ! 802: for (i=0; i < RX_RING_SIZE; i++) ! 803: if ((short)le16_to_cpu(lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].status) < 0) ! 804: break; ! 805: ! 806: if (i > RX_RING_SIZE -2) ! 807: { ! 808: lp->stats.rx_dropped++; ! 809: lp->rx_ring[entry].status |= le16_to_cpu(0x8000); ! 810: lp->cur_rx++; ! 811: } ! 812: break; ! 813: } ! 814: skb->dev = dev; ! 815: skb_reserve(skb,2); /* 16 byte align */ ! 816: skb_put(skb,pkt_len); /* Make room */ ! 817: eth_copy_and_sum(skb, ! 818: (unsigned char *)bus_to_virt(le32_to_cpu(lp->rx_ring[entry].base)), ! 819: pkt_len,0); ! 820: skb->protocol=eth_type_trans(skb,dev); ! 821: netif_rx(skb); ! 822: lp->stats.rx_packets++; ! 823: } ! 824: } ! 825: /* The docs say that the buffer length isn't touched, but Andrew Boyd ! 826: of QNX reports that some revs of the 79C965 clear it. */ ! 827: lp->rx_ring[entry].buf_length = le16_to_cpu(-PKT_BUF_SZ); ! 828: lp->rx_ring[entry].status |= le16_to_cpu(0x8000); ! 829: entry = (++lp->cur_rx) & RX_RING_MOD_MASK; ! 830: } ! 831: ! 832: /* We should check that at least two ring entries are free. If not, ! 833: we should free one and mark stats->rx_dropped++. */ ! 834: ! 835: return 0; ! 836: } ! 837: ! 838: static int ! 839: pcnet32_close(struct device *dev) ! 840: { ! 841: unsigned int ioaddr = dev->base_addr; ! 842: struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; ! 843: ! 844: dev->start = 0; ! 845: set_bit(0, (void*)&dev->tbusy); ! 846: ! 847: outw(112, ioaddr+PCNET32_ADDR); ! 848: lp->stats.rx_missed_errors = inw(ioaddr+PCNET32_DATA); ! 849: ! 850: outw(0, ioaddr+PCNET32_ADDR); ! 851: ! 852: if (pcnet32_debug > 1) ! 853: printk("%s: Shutting down ethercard, status was %2.2x.\n", ! 854: dev->name, inw(ioaddr+PCNET32_DATA)); ! 855: ! 856: /* We stop the PCNET32 here -- it occasionally polls ! 857: memory if we don't. */ ! 858: outw(0x0004, ioaddr+PCNET32_DATA); ! 859: ! 860: free_irq(dev->irq, dev); ! 861: MOD_DEC_USE_COUNT; ! 862: ! 863: return 0; ! 864: } ! 865: ! 866: static struct enet_statistics *pcnet32_get_stats(struct device *dev) ! 867: { ! 868: struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; ! 869: unsigned int ioaddr = dev->base_addr; ! 870: unsigned short saved_addr; ! 871: unsigned long flags; ! 872: ! 873: save_flags(flags); ! 874: cli(); ! 875: saved_addr = inw(ioaddr+PCNET32_ADDR); ! 876: outw(112, ioaddr+PCNET32_ADDR); ! 877: lp->stats.rx_missed_errors = inw(ioaddr+PCNET32_DATA); ! 878: outw(saved_addr, ioaddr+PCNET32_ADDR); ! 879: restore_flags(flags); ! 880: ! 881: return &lp->stats; ! 882: } ! 883: ! 884: /* Set or clear the multicast filter for this adaptor. ! 885: */ ! 886: ! 887: static void pcnet32_set_multicast_list(struct device *dev) ! 888: { ! 889: unsigned int ioaddr = dev->base_addr; ! 890: struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; ! 891: ! 892: if (dev->flags&IFF_PROMISC) { ! 893: /* Log any net taps. */ ! 894: printk("%s: Promiscuous mode enabled.\n", dev->name); ! 895: lp->init_block.mode |= 0x8000; ! 896: } else { ! 897: int num_addrs=dev->mc_count; ! 898: if(dev->flags&IFF_ALLMULTI) ! 899: num_addrs=1; ! 900: /* FIXIT: We don't use the multicast table, but rely on upper-layer filtering. */ ! 901: memset(lp->init_block.filter , (num_addrs == 0) ? 0 : -1, sizeof(lp->init_block.filter)); ! 902: lp->init_block.mode &= ~0x8000; ! 903: } ! 904: ! 905: outw(0, ioaddr+PCNET32_ADDR); ! 906: outw(0x0004, ioaddr+PCNET32_DATA); /* Temporarily stop the lance. */ ! 907: ! 908: pcnet32_restart(dev, 0x0042, 0); /* Resume normal operation */ ! 909: ! 910: } ! 911: ! 912: ! 913: #ifdef MODULE ! 914: #if LINUX_VERSION_CODE > 0x20118 ! 915: MODULE_AUTHOR("Donald Becker <[email protected]>"); ! 916: MODULE_DESCRIPTION("AMD PCnet/PCI ethernet driver"); ! 917: MODULE_PARM(debug, "i"); ! 918: MODULE_PARM(max_interrupt_work, "i"); ! 919: MODULE_PARM(rx_copybreak, "i"); ! 920: MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i"); ! 921: MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i"); ! 922: #endif ! 923: ! 924: /* An additional parameter that may be passed in... */ ! 925: static int debug = -1; ! 926: ! 927: int ! 928: init_module(void) ! 929: { ! 930: if (debug >= 0) ! 931: pcnet32_debug = debug; ! 932: ! 933: #ifdef CARDBUS ! 934: register_driver(&pcnet32_ops); ! 935: return 0; ! 936: #else ! 937: return pcnet32_probe(NULL); ! 938: #endif ! 939: } ! 940: ! 941: void ! 942: cleanup_module(void) ! 943: { ! 944: struct device *next_dev; ! 945: ! 946: #ifdef CARDBUS ! 947: unregister_driver(&pcnet32_ops); ! 948: #endif ! 949: ! 950: /* No need to check MOD_IN_USE, as sys_delete_module() checks. */ ! 951: while (root_pcnet32_dev) { ! 952: next_dev = ((struct pcnet32_private *)root_pcnet32_dev->priv)->next_module; ! 953: unregister_netdev(root_pcnet32_dev); ! 954: release_region(root_pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE); ! 955: kfree(root_pcnet32_dev); ! 956: root_pcnet32_dev = next_dev; ! 957: } ! 958: } ! 959: ! 960: #endif /* MODULE */ ! 961: ! 962: ! 963: /* ! 964: * Local variables: ! 965: * compile-command: "gcc -DMODULE -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -c pcnet32.c `[ -f /usr/include/linux/modversions.h ] && echo -DMODVERSIONS`" ! 966: * c-indent-level: 4 ! 967: * c-basic-offset: 4 ! 968: * tab-width: 4 ! 969: * End: ! 970: */
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