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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [net/] [pcnet32.c] - Rev 1765
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/* pcnet32.c: An AMD PCnet32 ethernet driver for linux. */ /* * Copyright 1996,97 Thomas Bogendoerfer, 1993-1995,1998 Donald Becker * Copyright 1993 United States Government as represented by the * Director, National Security Agency. * * Derived from the lance driver written 1993-1995 by Donald Becker. * * This software may be used and distributed according to the terms * of the GNU Public License, incorporated herein by reference. * * This driver is for AMD PCnet-PCI based ethercards */ static const char *version = "pcnet32.c:v0.99B 4/4/98 DJBecker/TSBogend.\n"; /* A few user-configurable values. */ /* Maximum events (Rx packets, etc.) to handle at each interrupt. */ static int max_interrupt_work = 20; /* * Set the number of Tx and Rx buffers, using Log_2(# buffers). * Reasonable default values are 4 Tx buffers, and 16 Rx buffers. * That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4). */ #define PCNET_LOG_TX_BUFFERS 4 #define PCNET_LOG_RX_BUFFERS 4 #ifdef MODULE #ifdef MODVERSIONS #include <linux/modversions.h> #endif #include <linux/module.h> #include <linux/version.h> #else #define MOD_INC_USE_COUNT #define MOD_DEC_USE_COUNT #endif #include <linux/kernel.h> #include <linux/sched.h> #include <linux/string.h> #include <linux/ptrace.h> #include <linux/errno.h> #include <linux/ioport.h> #include <linux/malloc.h> #include <linux/interrupt.h> #include <linux/pci.h> #include <linux/bios32.h> #include <asm/bitops.h> #include <asm/io.h> #include <asm/dma.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> /* Driver verbosity level. 0 = no messages, 7 = wordy death. Modify here, or when loading as a module. */ static int pcnet32_debug = 1; /* * Theory of Operation * * This driver uses the same software structure as the normal lance * driver. So look for a verbose description in lance.c. The differences * to the normal lance driver is the use of the 32bit mode of PCnet32 * and PCnetPCI chips. Because these chips are 32bit chips, there is no * 16MB limitation and we don't need bounce buffers. */ /* * History: * v0.01: Initial version * only tested on Alpha Noname Board * v0.02: changed IRQ handling for new interrupt scheme (dev_id) * tested on a ASUS SP3G * v0.10: fixed an odd problem with the 79C794 in a Compaq Deskpro XL * looks like the 974 doesn't like stopping and restarting in a * short period of time; now we do a reinit of the lance; the * bug was triggered by doing ifconfig eth0 <ip> broadcast <addr> * and hangs the machine (thanks to Klaus Liedl for debugging) * v0.12: by suggestion from Donald Becker: Renamed driver to pcnet32, * made it standalone (no need for lance.c) * v0.13: added additional PCI detecting for special PCI devices (Compaq) * v0.14: stripped down additional PCI probe (thanks to David C Niemi * and sveneric@xs4all.nl for testing this on their Compaq boxes) * v0.15: added 79C965 (VLB) probe * added interrupt sharing for PCI chips * v0.16: fixed set_multicast_list on Alpha machines * v0.17: removed hack from dev.c; now pcnet32 uses ethif_probe in Space.c * v0.19: changed setting of autoselect bit * v0.20: removed additional Compaq PCI probe; there is now a working one * in arch/i386/bios32.c * v0.21: added endian conversion for ppc, from work by cort@cs.nmt.edu * v0.22: added printing of status to ring dump * v0.23: changed enet_statistics to net_devive_stats * v0.99: Changes for 2.0.34 final release. -djb */ #ifndef __powerpc__ #define le16_to_cpu(val) (val) #define le32_to_cpu(val) (val) #endif #if (LINUX_VERSION_CODE < 0x20123) #define test_and_set_bit(val, addr) set_bit(val, addr) #endif #define TX_RING_SIZE (1 << (PCNET_LOG_TX_BUFFERS)) #define TX_RING_MOD_MASK (TX_RING_SIZE - 1) #define TX_RING_LEN_BITS ((PCNET_LOG_TX_BUFFERS) << 12) #define RX_RING_SIZE (1 << (PCNET_LOG_RX_BUFFERS)) #define RX_RING_MOD_MASK (RX_RING_SIZE - 1) #define RX_RING_LEN_BITS ((PCNET_LOG_RX_BUFFERS) << 4) #define PKT_BUF_SZ 1544 /* Offsets from base I/O address. */ enum pcnet_offsets { PCNET32_DATA=0x10, PCNET32_ADDR=0x12, PCNET32_RESET=0x14, PCNET32_BUS_IF=0x16,}; #define PCNET32_TOTAL_SIZE 0x20 /* The PCNET32 Rx and Tx ring descriptors. */ struct pcnet32_rx_head { u32 base; s16 buf_length; s16 status; u32 msg_length; u32 reserved; }; struct pcnet32_tx_head { u32 base; s16 length; s16 status; u32 misc; u32 reserved; }; /* The PCNET32 32-Bit initialization block, described in databook. */ struct pcnet32_init_block { u16 mode; u16 tlen_rlen; u8 phys_addr[6]; u16 reserved; u32 filter[2]; /* Receive and transmit ring base, along with extra bits. */ u32 rx_ring; u32 tx_ring; }; struct pcnet32_private { /* The Tx and Rx ring entries must be aligned on 16-byte boundaries in 32bit mode. */ struct pcnet32_rx_head rx_ring[RX_RING_SIZE]; struct pcnet32_tx_head tx_ring[TX_RING_SIZE]; struct pcnet32_init_block init_block; const char *name; struct device *next_module; /* The saved address of a sent-in-place packet/buffer, for skfree(). */ struct sk_buff* tx_skbuff[TX_RING_SIZE]; unsigned long rx_buffs; /* Address of Rx and Tx buffers. */ int cur_rx, cur_tx; /* The next free ring entry */ int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */ struct enet_statistics stats; char tx_full; unsigned long lock; }; static struct pcnet_chip_type { int id_number; const char *name; int flags; } chip_table[] = { {0x2420, "PCnet/PCI 79C970", 0}, {0x2430, "PCnet32", 0}, {0x2621, "PCnet/PCI II 79C970A", 0}, {0x2623, "PCnet/FAST 79C971", 0}, {0x2624, "PCnet/FAST+ 79C972", 0}, {0x0, "PCnet32 (unknown)", 0}, }; /* Index of functions. */ int pcnet32_probe(struct device *dev); static int pcnet32_probe1(struct device *dev, unsigned int ioaddr, unsigned char irq_line); static int pcnet32_open(struct device *dev); static void pcnet32_init_ring(struct device *dev); static int pcnet32_start_xmit(struct sk_buff *skb, struct device *dev); static int pcnet32_rx(struct device *dev); static void pcnet32_interrupt(int irq, void *dev_id, struct pt_regs *regs); static int pcnet32_close(struct device *dev); static struct enet_statistics *pcnet32_get_stats(struct device *dev); static void pcnet32_set_multicast_list(struct device *dev); /* A list of all installed PCnet32 devices, for removing the driver module. */ static struct device *root_pcnet32_dev = NULL; int pcnet32_probe (struct device *dev) { static int pci_index = 0; /* Static, for multiple probe calls. */ int cards_found = 0; if ( ! pcibios_present()) return ENODEV; for (;pci_index < 0xff; pci_index++) { u8 irq_line; u16 pci_command, new_command; unsigned char pci_bus, pci_device_fn; u32 pci_ioaddr; if (pcibios_find_device (PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE, pci_index, &pci_bus, &pci_device_fn) != PCIBIOS_SUCCESSFUL) break; pcibios_read_config_byte(pci_bus, pci_device_fn, PCI_INTERRUPT_LINE, &irq_line); pcibios_read_config_dword(pci_bus, pci_device_fn, PCI_BASE_ADDRESS_0, &pci_ioaddr); /* Remove I/O space marker in bit 0. */ pci_ioaddr &= ~3; /* Avoid already found cards from previous pcnet32_probe() calls */ if (check_region(pci_ioaddr, PCNET32_TOTAL_SIZE)) continue; /* Activate the card: fix for brain-damaged Win98 BIOSes. */ pcibios_read_config_word(pci_bus, pci_device_fn, PCI_COMMAND, &pci_command); new_command = pci_command | PCI_COMMAND_MASTER|PCI_COMMAND_IO; if (pci_command != new_command) { printk(KERN_INFO " The PCI BIOS has not enabled the AMD Ethernet" " device at %2x-%2x." " Updating PCI command %4.4x->%4.4x.\n", pci_bus, pci_device_fn, pci_command, new_command); pcibios_write_config_word(pci_bus, pci_device_fn, PCI_COMMAND, new_command); } if (pcnet32_probe1(dev, pci_ioaddr, irq_line) != 0) { /* Should never happen. */ printk(KERN_ERR "pcnet32.c: Probe of PCI card at %#x failed.\n", pci_ioaddr); } else dev = 0; cards_found++; } return cards_found ? 0 : -ENODEV; } /* pcnet32_probe1 */ static int pcnet32_probe1(struct device *dev, unsigned int ioaddr, unsigned char irq_line) { struct pcnet32_private *lp; int i; const char *chipname; /* check if there is really a pcnet chip on that ioaddr */ if ((inb(ioaddr + 14) != 0x57) || (inb(ioaddr + 15) != 0x57)) return ENODEV; inw(ioaddr+PCNET32_RESET); /* Reset the PCNET32 */ outw(0x0000, ioaddr+PCNET32_ADDR); /* Switch to window 0 */ if (inw(ioaddr+PCNET32_DATA) != 0x0004) return ENODEV; /* Get the version of the chip. */ outw(88, ioaddr+PCNET32_ADDR); if (inw(ioaddr+PCNET32_ADDR) != 88) { /* should never happen */ return ENODEV; } else { /* Good, it's a newer chip. */ int chip_version = inw(ioaddr+PCNET32_DATA); outw(89, ioaddr+PCNET32_ADDR); chip_version |= inw(ioaddr+PCNET32_DATA) << 16; if (pcnet32_debug > 2) printk(" PCnet chip version is %#x.\n", chip_version); if ((chip_version & 0xfff) != 0x003) return ENODEV; chip_version = (chip_version >> 12) & 0xffff; for (i = 0; chip_table[i].id_number; i++) if (chip_table[i].id_number == chip_version) break; chipname = chip_table[i].name; } dev = init_etherdev(dev, 0); printk("%s: %s at %#3x,", dev->name, chipname, ioaddr); /* There is a 16 byte station address PROM at the base address. The first six bytes are the station address. */ for (i = 0; i < 6; i++) printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i)); printk("\n"); dev->base_addr = ioaddr; request_region(ioaddr, PCNET32_TOTAL_SIZE, dev->name); /* Data structures used by the PCnet32 are 16byte aligned and DMAble. */ lp = (struct pcnet32_private *) (((unsigned long)kmalloc(sizeof(*lp)+15, GFP_DMA | GFP_KERNEL)+15) & ~15); memset(lp, 0, sizeof(*lp)); dev->priv = lp; lp->next_module = root_pcnet32_dev; root_pcnet32_dev = dev; lp->name = chipname; lp->rx_buffs = (unsigned long) kmalloc(PKT_BUF_SZ*RX_RING_SIZE, GFP_DMA | GFP_KERNEL); lp->init_block.mode = le16_to_cpu(0x0003); /* Disable Rx and Tx. */ lp->init_block.tlen_rlen = le16_to_cpu(TX_RING_LEN_BITS | RX_RING_LEN_BITS); for (i = 0; i < 6; i++) lp->init_block.phys_addr[i] = dev->dev_addr[i]; lp->init_block.filter[0] = 0x00000000; lp->init_block.filter[1] = 0x00000000; lp->init_block.rx_ring = (u32)le32_to_cpu(virt_to_bus(lp->rx_ring)); lp->init_block.tx_ring = (u32)le32_to_cpu(virt_to_bus(lp->tx_ring)); /* switch pcnet32 to 32bit mode */ outw(0x0014, ioaddr+PCNET32_ADDR); outw(0x0002, ioaddr+PCNET32_BUS_IF); outw(0x0001, ioaddr+PCNET32_ADDR); inw(ioaddr+PCNET32_ADDR); outw(virt_to_bus(&lp->init_block) & 0xffff, ioaddr+PCNET32_DATA); outw(0x0002, ioaddr+PCNET32_ADDR); inw(ioaddr+PCNET32_ADDR); outw(virt_to_bus(&lp->init_block) >> 16, ioaddr+PCNET32_DATA); outw(0x0000, ioaddr+PCNET32_ADDR); inw(ioaddr+PCNET32_ADDR); dev->irq = irq_line; if (pcnet32_debug > 0) printk(version); /* The PCNET32-specific entries in the device structure. */ dev->open = &pcnet32_open; dev->hard_start_xmit = &pcnet32_start_xmit; dev->stop = &pcnet32_close; dev->get_stats = &pcnet32_get_stats; dev->set_multicast_list = &pcnet32_set_multicast_list; /* Fill in the generic fields of the device structure. */ ether_setup(dev); return 0; } static int pcnet32_open(struct device *dev) { struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; unsigned int ioaddr = dev->base_addr; int i; if (dev->irq == 0 || request_irq(dev->irq, &pcnet32_interrupt, SA_SHIRQ, dev->name, (void *)dev)) { return -EAGAIN; } MOD_INC_USE_COUNT; /* Reset the PCNET32 */ inw(ioaddr+PCNET32_RESET); /* switch pcnet32 to 32bit mode */ outw(0x0014, ioaddr+PCNET32_ADDR); outw(0x0002, ioaddr+PCNET32_BUS_IF); /* Turn on auto-select of media (AUI, BNC). */ outw(0x0002, ioaddr+PCNET32_ADDR); /* only touch autoselect bit */ outw(inw(ioaddr+PCNET32_BUS_IF) | 0x0002, ioaddr+PCNET32_BUS_IF); if (pcnet32_debug > 1) printk("%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.\n", dev->name, dev->irq, (u32) virt_to_bus(lp->tx_ring), (u32) virt_to_bus(lp->rx_ring), (u32) virt_to_bus(&lp->init_block)); /* check for ATLAS T1/E1 LAW card */ if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0 && dev->dev_addr[2] == 0x75) { /* select GPSI mode */ lp->init_block.mode = 0x0100; outw(0x0002, ioaddr+PCNET32_ADDR); outw(inw(ioaddr+PCNET32_BUS_IF) & ~2, ioaddr+PCNET32_BUS_IF); /* switch full duplex on */ outw(0x0009, ioaddr+PCNET32_ADDR); outw(inw(ioaddr+PCNET32_BUS_IF) | 1, ioaddr+PCNET32_BUS_IF); } else lp->init_block.mode = 0x0000; lp->init_block.filter[0] = 0x00000000; lp->init_block.filter[1] = 0x00000000; pcnet32_init_ring(dev); /* Re-initialize the PCNET32, and start it when done. */ outw(0x0001, ioaddr+PCNET32_ADDR); outw(virt_to_bus(&lp->init_block) &0xffff, ioaddr+PCNET32_DATA); outw(0x0002, ioaddr+PCNET32_ADDR); outw(virt_to_bus(&lp->init_block) >> 16, ioaddr+PCNET32_DATA); outw(0x0004, ioaddr+PCNET32_ADDR); outw(0x0915, ioaddr+PCNET32_DATA); outw(0x0000, ioaddr+PCNET32_ADDR); outw(0x0001, ioaddr+PCNET32_DATA); dev->tbusy = 0; dev->interrupt = 0; dev->start = 1; i = 0; while (i++ < 100) if (inw(ioaddr+PCNET32_DATA) & 0x0100) break; /* * We used to clear the InitDone bit, 0x0100, here but Mark Stockton * reports that doing so triggers a bug in the '974. */ outw(0x0042, ioaddr+PCNET32_DATA); if (pcnet32_debug > 2) printk("%s: PCNET32 open after %d ticks, init block %#x csr0 %4.4x.\n", dev->name, i, (u32) virt_to_bus(&lp->init_block), inw(ioaddr+PCNET32_DATA)); return 0; /* Always succeed */ } /* * The LANCE has been halted for one reason or another (busmaster memory * arbitration error, Tx FIFO underflow, driver stopped it to reconfigure, * etc.). Modern LANCE variants always reload their ring-buffer * configuration when restarted, so we must reinitialize our ring * context before restarting. As part of this reinitialization, * find all packets still on the Tx ring and pretend that they had been * sent (in effect, drop the packets on the floor) - the higher-level * protocols will time out and retransmit. It'd be better to shuffle * these skbs to a temp list and then actually re-Tx them after * restarting the chip, but I'm too lazy to do so right now. dplatt@3do.com */ static void pcnet32_purge_tx_ring(struct device *dev) { struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; int i; for (i = 0; i < TX_RING_SIZE; i++) { if (lp->tx_skbuff[i]) { dev_kfree_skb(lp->tx_skbuff[i], FREE_WRITE); lp->tx_skbuff[i] = NULL; } } } /* Initialize the PCNET32 Rx and Tx rings. */ static void pcnet32_init_ring(struct device *dev) { struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; int i; lp->lock = 0, lp->tx_full = 0; lp->cur_rx = lp->cur_tx = 0; lp->dirty_rx = lp->dirty_tx = 0; for (i = 0; i < RX_RING_SIZE; i++) { lp->rx_ring[i].base = (u32)le32_to_cpu(virt_to_bus((char *)lp->rx_buffs + i*PKT_BUF_SZ)); lp->rx_ring[i].buf_length = le16_to_cpu(-PKT_BUF_SZ); lp->rx_ring[i].status = le16_to_cpu(0x8000); } /* The Tx buffer address is filled in as needed, but we do need to clear the upper ownership bit. */ for (i = 0; i < TX_RING_SIZE; i++) { lp->tx_ring[i].base = 0; lp->tx_ring[i].status = 0; } lp->init_block.tlen_rlen = TX_RING_LEN_BITS | RX_RING_LEN_BITS; for (i = 0; i < 6; i++) lp->init_block.phys_addr[i] = dev->dev_addr[i]; lp->init_block.rx_ring = (u32)le32_to_cpu(virt_to_bus(lp->rx_ring)); lp->init_block.tx_ring = (u32)le32_to_cpu(virt_to_bus(lp->tx_ring)); } static void pcnet32_restart(struct device *dev, unsigned int csr0_bits, int must_reinit) { int i; unsigned int ioaddr = dev->base_addr; pcnet32_purge_tx_ring(dev); pcnet32_init_ring(dev); outw(0x0000, ioaddr + PCNET32_ADDR); /* ReInit Ring */ outw(0x0001, ioaddr + PCNET32_DATA); i = 0; while (i++ < 100) if (inw(ioaddr+PCNET32_DATA) & 0x0100) break; outw(csr0_bits, ioaddr + PCNET32_DATA); } static int pcnet32_start_xmit(struct sk_buff *skb, struct device *dev) { struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; unsigned int ioaddr = dev->base_addr; int entry; unsigned long flags; /* Transmitter timeout, serious problems. */ if (dev->tbusy) { int tickssofar = jiffies - dev->trans_start; if (tickssofar < 20) return 1; outw(0, ioaddr+PCNET32_ADDR); printk("%s: transmit timed out, status %4.4x, resetting.\n", dev->name, inw(ioaddr+PCNET32_DATA)); outw(0x0004, ioaddr+PCNET32_DATA); lp->stats.tx_errors++; #ifndef final_version { int i; printk(" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.", lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "", lp->cur_rx); for (i = 0 ; i < RX_RING_SIZE; i++) printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ", lp->rx_ring[i].base, -lp->rx_ring[i].buf_length, lp->rx_ring[i].msg_length, (unsigned)lp->rx_ring[i].status); for (i = 0 ; i < TX_RING_SIZE; i++) printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ", lp->tx_ring[i].base, -lp->tx_ring[i].length, lp->tx_ring[i].misc, (unsigned)lp->tx_ring[i].status); printk("\n"); } #endif pcnet32_restart(dev, 0x0042, 1); dev->tbusy = 0; dev->trans_start = jiffies; return 0; } if (pcnet32_debug > 3) { outw(0x0000, ioaddr+PCNET32_ADDR); printk("%s: pcnet32_start_xmit() called, csr0 %4.4x.\n", dev->name, inw(ioaddr+PCNET32_DATA)); outw(0x0000, ioaddr+PCNET32_DATA); } /* Block a timer-based transmit from overlapping. This could better be done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */ if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) { printk("%s: Transmitter access conflict.\n", dev->name); return 1; } if (test_and_set_bit(0, (void*)&lp->lock) != 0) { if (pcnet32_debug > 0) printk("%s: tx queue lock!.\n", dev->name); /* don't clear dev->tbusy flag. */ return 1; } /* Fill in a Tx ring entry */ /* Mask to ring buffer boundary. */ entry = lp->cur_tx & TX_RING_MOD_MASK; /* Caution: the write order is important here, set the base address with the "ownership" bits last. */ lp->tx_ring[entry].length = le16_to_cpu(-skb->len); lp->tx_ring[entry].misc = 0x00000000; lp->tx_skbuff[entry] = skb; lp->tx_ring[entry].base = (u32)le32_to_cpu(virt_to_bus(skb->data)); lp->tx_ring[entry].status = le16_to_cpu(0x8300); lp->cur_tx++; /* Trigger an immediate send poll. */ outw(0x0000, ioaddr+PCNET32_ADDR); outw(0x0048, ioaddr+PCNET32_DATA); dev->trans_start = jiffies; save_flags(flags); cli(); lp->lock = 0; if (lp->tx_ring[(entry+1) & TX_RING_MOD_MASK].base == 0) clear_bit(0, (void*)&dev->tbusy); else lp->tx_full = 1; restore_flags(flags); return 0; } /* The PCNET32 interrupt handler. */ static void pcnet32_interrupt(int irq, void *dev_id, struct pt_regs * regs) { struct device *dev = (struct device *)dev_id; struct pcnet32_private *lp; unsigned int csr0, ioaddr; int boguscnt = max_interrupt_work; int must_restart; if (dev == NULL) { printk ("pcnet32_interrupt(): irq %d for unknown device.\n", irq); return; } ioaddr = dev->base_addr; lp = (struct pcnet32_private *)dev->priv; if (dev->interrupt) printk("%s: Re-entering the interrupt handler.\n", dev->name); dev->interrupt = 1; outw(0x00, dev->base_addr + PCNET32_ADDR); while ((csr0 = inw(dev->base_addr + PCNET32_DATA)) & 0x8600 && --boguscnt >= 0) { /* Acknowledge all of the current interrupt sources ASAP. */ outw(csr0 & ~0x004f, dev->base_addr + PCNET32_DATA); must_restart = 0; if (pcnet32_debug > 5) printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n", dev->name, csr0, inw(dev->base_addr + PCNET32_DATA)); if (csr0 & 0x0400) /* Rx interrupt */ pcnet32_rx(dev); if (csr0 & 0x0200) { /* Tx-done interrupt */ int dirty_tx = lp->dirty_tx; while (dirty_tx < lp->cur_tx) { int entry = dirty_tx & TX_RING_MOD_MASK; int status = (short)le16_to_cpu(lp->tx_ring[entry].status); if (status < 0) break; /* It still hasn't been Txed */ lp->tx_ring[entry].base = 0; if (status & 0x4000) { /* There was an major error, log it. */ int err_status = le16_to_cpu(lp->tx_ring[entry].misc); lp->stats.tx_errors++; if (err_status & 0x04000000) lp->stats.tx_aborted_errors++; if (err_status & 0x08000000) lp->stats.tx_carrier_errors++; if (err_status & 0x10000000) lp->stats.tx_window_errors++; if (err_status & 0x40000000) { /* Ackk! On FIFO errors the Tx unit is turned off! */ lp->stats.tx_fifo_errors++; /* Remove this verbosity later! */ printk("%s: Tx FIFO error! Status %4.4x.\n", dev->name, csr0); /* Restart the chip. */ must_restart = 1; } } else { if (status & 0x1800) lp->stats.collisions++; lp->stats.tx_packets++; } /* We must free the original skb */ if (lp->tx_skbuff[entry]) { dev_kfree_skb(lp->tx_skbuff[entry], FREE_WRITE); lp->tx_skbuff[entry] = 0; } dirty_tx++; } #ifndef final_version if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) { printk("out-of-sync dirty pointer, %d vs. %d, full=%d.\n", dirty_tx, lp->cur_tx, lp->tx_full); dirty_tx += TX_RING_SIZE; } #endif if (lp->tx_full && dev->tbusy && dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) { /* The ring is no longer full, clear tbusy. */ lp->tx_full = 0; clear_bit(0, (void*)&dev->tbusy); mark_bh(NET_BH); } lp->dirty_tx = dirty_tx; } /* Log misc errors. */ if (csr0 & 0x4000) lp->stats.tx_errors++; /* Tx babble. */ if (csr0 & 0x1000) { /* * this happens when our receive ring is full. This * shouldn't be a problem as we will see normal rx * interrupts for the frames in the receive ring. But * there are some PCI chipsets (I can reproduce this * on SP3G with Intel saturn chipset) which have some- * times problems and will fill up the receive ring * with error descriptors. In this situation we don't * get a rx interrupt, but a missed frame interrupt * sooner or later. So we try to clean up our receive * ring here. */ pcnet32_rx(dev); lp->stats.rx_errors++; /* Missed a Rx frame. */ } if (csr0 & 0x0800) { printk("%s: Bus master arbitration failure, status %4.4x.\n", dev->name, csr0); /* Restart the chip. */ must_restart = 1; } if (must_restart) { /* stop the chip to clear the error condition, then restart */ outw(0x0000, dev->base_addr + PCNET32_ADDR); outw(0x0004, dev->base_addr + PCNET32_DATA); pcnet32_restart(dev, 0x0002, 0); } } /* Clear any other interrupt, and set interrupt enable. */ outw(0x0000, dev->base_addr + PCNET32_ADDR); outw(0x7940, dev->base_addr + PCNET32_DATA); if (pcnet32_debug > 4) printk("%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name, inw(ioaddr + PCNET32_ADDR), inw(dev->base_addr + PCNET32_DATA)); dev->interrupt = 0; return; } static int pcnet32_rx(struct device *dev) { struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; int entry = lp->cur_rx & RX_RING_MOD_MASK; int i; /* If we own the next entry, it's a new packet. Send it up. */ while ((short)le16_to_cpu(lp->rx_ring[entry].status) >= 0) { int status = (short)le16_to_cpu(lp->rx_ring[entry].status) >> 8; if (status != 0x03) { /* There was an error. */ /* There is a tricky error noted by John Murphy, <murf@perftech.com> to Russ Nelson: Even with full-sized buffers it's possible for a jabber packet to use two buffers, with only the last correctly noting the error. */ if (status & 0x01) /* Only count a general error at the */ lp->stats.rx_errors++; /* end of a packet.*/ if (status & 0x20) lp->stats.rx_frame_errors++; if (status & 0x10) lp->stats.rx_over_errors++; if (status & 0x08) lp->stats.rx_crc_errors++; if (status & 0x04) lp->stats.rx_fifo_errors++; lp->rx_ring[entry].status &= le16_to_cpu(0x03ff); } else { /* Malloc up new buffer, compatible with net-2e. */ short pkt_len = (le32_to_cpu(lp->rx_ring[entry].msg_length) & 0xfff)-4; struct sk_buff *skb; if(pkt_len < 60) { printk("%s: Runt packet!\n",dev->name); lp->stats.rx_errors++; } else { skb = dev_alloc_skb(pkt_len+2); if (skb == NULL) { printk("%s: Memory squeeze, deferring packet.\n", dev->name); for (i=0; i < RX_RING_SIZE; i++) if ((short)le16_to_cpu(lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].status) < 0) break; if (i > RX_RING_SIZE -2) { lp->stats.rx_dropped++; lp->rx_ring[entry].status |= le16_to_cpu(0x8000); lp->cur_rx++; } break; } skb->dev = dev; skb_reserve(skb,2); /* 16 byte align */ skb_put(skb,pkt_len); /* Make room */ eth_copy_and_sum(skb, (unsigned char *)bus_to_virt(le32_to_cpu(lp->rx_ring[entry].base)), pkt_len,0); skb->protocol=eth_type_trans(skb,dev); netif_rx(skb); lp->stats.rx_packets++; } } /* The docs say that the buffer length isn't touched, but Andrew Boyd of QNX reports that some revs of the 79C965 clear it. */ lp->rx_ring[entry].buf_length = le16_to_cpu(-PKT_BUF_SZ); lp->rx_ring[entry].status |= le16_to_cpu(0x8000); entry = (++lp->cur_rx) & RX_RING_MOD_MASK; } /* We should check that at least two ring entries are free. If not, we should free one and mark stats->rx_dropped++. */ return 0; } static int pcnet32_close(struct device *dev) { unsigned int ioaddr = dev->base_addr; struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; dev->start = 0; set_bit(0, (void*)&dev->tbusy); outw(112, ioaddr+PCNET32_ADDR); lp->stats.rx_missed_errors = inw(ioaddr+PCNET32_DATA); outw(0, ioaddr+PCNET32_ADDR); if (pcnet32_debug > 1) printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(ioaddr+PCNET32_DATA)); /* We stop the PCNET32 here -- it occasionally polls memory if we don't. */ outw(0x0004, ioaddr+PCNET32_DATA); free_irq(dev->irq, dev); MOD_DEC_USE_COUNT; return 0; } static struct enet_statistics *pcnet32_get_stats(struct device *dev) { struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; unsigned int ioaddr = dev->base_addr; unsigned short saved_addr; unsigned long flags; save_flags(flags); cli(); saved_addr = inw(ioaddr+PCNET32_ADDR); outw(112, ioaddr+PCNET32_ADDR); lp->stats.rx_missed_errors = inw(ioaddr+PCNET32_DATA); outw(saved_addr, ioaddr+PCNET32_ADDR); restore_flags(flags); return &lp->stats; } /* Set or clear the multicast filter for this adaptor. */ static void pcnet32_set_multicast_list(struct device *dev) { unsigned int ioaddr = dev->base_addr; struct pcnet32_private *lp = (struct pcnet32_private *)dev->priv; if (dev->flags&IFF_PROMISC) { /* Log any net taps. */ printk("%s: Promiscuous mode enabled.\n", dev->name); lp->init_block.mode |= 0x8000; } else { int num_addrs=dev->mc_count; if(dev->flags&IFF_ALLMULTI) num_addrs=1; /* FIXIT: We don't use the multicast table, but rely on upper-layer filtering. */ memset(lp->init_block.filter , (num_addrs == 0) ? 0 : -1, sizeof(lp->init_block.filter)); lp->init_block.mode &= ~0x8000; } outw(0, ioaddr+PCNET32_ADDR); outw(0x0004, ioaddr+PCNET32_DATA); /* Temporarily stop the lance. */ pcnet32_restart(dev, 0x0042, 0); /* Resume normal operation */ } #ifdef MODULE #if LINUX_VERSION_CODE > 0x20118 MODULE_AUTHOR("Donald Becker <becker@cesdis.gsfc.nasa.gov>"); MODULE_DESCRIPTION("AMD PCnet/PCI ethernet driver"); MODULE_PARM(debug, "i"); MODULE_PARM(max_interrupt_work, "i"); MODULE_PARM(rx_copybreak, "i"); MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i"); MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i"); #endif /* An additional parameter that may be passed in... */ static int debug = -1; int init_module(void) { if (debug >= 0) pcnet32_debug = debug; #ifdef CARDBUS register_driver(&pcnet32_ops); return 0; #else return pcnet32_probe(NULL); #endif } void cleanup_module(void) { struct device *next_dev; #ifdef CARDBUS unregister_driver(&pcnet32_ops); #endif /* No need to check MOD_IN_USE, as sys_delete_module() checks. */ while (root_pcnet32_dev) { next_dev = ((struct pcnet32_private *)root_pcnet32_dev->priv)->next_module; unregister_netdev(root_pcnet32_dev); release_region(root_pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE); kfree(root_pcnet32_dev); root_pcnet32_dev = next_dev; } } #endif /* MODULE */ /* * Local variables: * 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`" * c-indent-level: 4 * c-basic-offset: 4 * tab-width: 4 * End: */