pcnet32.c
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- /* pcnet32.c: An AMD PCnet32 ethernet driver for linux. */
- /*
- * Copyright 1996-1999 Thomas Bogendoerfer
- *
- * Derived from the lance driver written 1993,1994,1995 by Donald Becker.
- *
- * Copyright 1993 United States Government as represented by the
- * Director, National Security Agency.
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- * This driver is for PCnet32 and PCnetPCI based ethercards
- */
- /**************************************************************************
- * 23 Oct, 2000.
- * Fixed a few bugs, related to running the controller in 32bit mode.
- *
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
- *
- *************************************************************************/
- #define DRV_NAME "pcnet32"
- #define DRV_VERSION "1.25kf"
- #define DRV_RELDATE "17.11.2001"
- static const char *version =
- DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " tsbogend@alpha.franken.den";
- #include <linux/module.h>
- #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/slab.h>
- #include <linux/interrupt.h>
- #include <linux/pci.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <linux/ethtool.h>
- #include <linux/mii.h>
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/dma.h>
- #include <asm/uaccess.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #include <linux/spinlock.h>
- static unsigned int pcnet32_portlist[] __initdata = {0x300, 0x320, 0x340, 0x360, 0};
- /*
- * PCI device identifiers for "new style" Linux PCI Device Drivers
- */
- static struct pci_device_id pcnet32_pci_tbl[] __devinitdata = {
- { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE_HOME, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
- { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
- { 0, }
- };
- static int pcnet32_debug = 1;
- static int tx_start = 1; /* Mapping -- 0:20, 1:64, 2:128, 3:~220 (depends on chip vers) */
- static struct net_device *pcnet32_dev;
- static const int max_interrupt_work = 80;
- static const int rx_copybreak = 200;
- #define PCNET32_PORT_AUI 0x00
- #define PCNET32_PORT_10BT 0x01
- #define PCNET32_PORT_GPSI 0x02
- #define PCNET32_PORT_MII 0x03
- #define PCNET32_PORT_PORTSEL 0x03
- #define PCNET32_PORT_ASEL 0x04
- #define PCNET32_PORT_100 0x40
- #define PCNET32_PORT_FD 0x80
- #define PCNET32_DMA_MASK 0xffffffff
- /*
- * table to translate option values from tulip
- * to internal options
- */
- static unsigned char options_mapping[] = {
- PCNET32_PORT_ASEL, /* 0 Auto-select */
- PCNET32_PORT_AUI, /* 1 BNC/AUI */
- PCNET32_PORT_AUI, /* 2 AUI/BNC */
- PCNET32_PORT_ASEL, /* 3 not supported */
- PCNET32_PORT_10BT | PCNET32_PORT_FD, /* 4 10baseT-FD */
- PCNET32_PORT_ASEL, /* 5 not supported */
- PCNET32_PORT_ASEL, /* 6 not supported */
- PCNET32_PORT_ASEL, /* 7 not supported */
- PCNET32_PORT_ASEL, /* 8 not supported */
- PCNET32_PORT_MII, /* 9 MII 10baseT */
- PCNET32_PORT_MII | PCNET32_PORT_FD, /* 10 MII 10baseT-FD */
- PCNET32_PORT_MII, /* 11 MII (autosel) */
- PCNET32_PORT_10BT, /* 12 10BaseT */
- PCNET32_PORT_MII | PCNET32_PORT_100, /* 13 MII 100BaseTx */
- PCNET32_PORT_MII | PCNET32_PORT_100 | PCNET32_PORT_FD, /* 14 MII 100BaseTx-FD */
- PCNET32_PORT_ASEL /* 15 not supported */
- };
- #define MAX_UNITS 8
- static int options[MAX_UNITS];
- static int full_duplex[MAX_UNITS];
- /*
- * 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 79C974 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
- * v0.90: added multicast filter
- * added module support
- * changed irq probe to new style
- * added PCnetFast chip id
- * added fix for receive stalls with Intel saturn chipsets
- * added in-place rx skbs like in the tulip driver
- * minor cleanups
- * v0.91: added PCnetFast+ chip id
- * back port to 2.0.x
- * v1.00: added some stuff from Donald Becker's 2.0.34 version
- * added support for byte counters in net_dev_stats
- * v1.01: do ring dumps, only when debugging the driver
- * increased the transmit timeout
- * v1.02: fixed memory leak in pcnet32_init_ring()
- * v1.10: workaround for stopped transmitter
- * added port selection for modules
- * detect special T1/E1 WAN card and setup port selection
- * v1.11: fixed wrong checking of Tx errors
- * v1.20: added check of return value kmalloc (cpeterso@cs.washington.edu)
- * added save original kmalloc addr for freeing (mcr@solidum.com)
- * added support for PCnetHome chip (joe@MIT.EDU)
- * rewritten PCI card detection
- * added dwio mode to get driver working on some PPC machines
- * v1.21: added mii selection and mii ioctl
- * v1.22: changed pci scanning code to make PPC people happy
- * fixed switching to 32bit mode in pcnet32_open() (thanks
- * to Michael Richard <mcr@solidum.com> for noticing this one)
- * added sub vendor/device id matching (thanks again to
- * Michael Richard <mcr@solidum.com>)
- * added chip id for 79c973/975 (thanks to Zach Brown <zab@zabbo.net>)
- * v1.23 fixed small bug, when manual selecting MII speed/duplex
- * v1.24 Applied Thomas' patch to use TxStartPoint and thus decrease TxFIFO
- * underflows. Added tx_start_pt module parameter. Increased
- * TX_RING_SIZE from 16 to 32. Added #ifdef'd code to use DXSUFLO
- * for FAST[+] chipsets. <kaf@fc.hp.com>
- * v1.24ac Added SMP spinlocking - Alan Cox <alan@redhat.com>
- * v1.25kf Added No Interrupt on successful Tx for some Tx's <kaf@fc.hp.com>
- * v1.26 Converted to pci_alloc_consistent, Jamey Hicks / George France
- * <jamey@crl.dec.com>
- * v1.26p Fix oops on rmmod+insmod; plug i/o resource leak - Paul Gortmaker
- */
- /*
- * 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).
- */
- #ifndef PCNET32_LOG_TX_BUFFERS
- #define PCNET32_LOG_TX_BUFFERS 4
- #define PCNET32_LOG_RX_BUFFERS 5
- #endif
- #define TX_RING_SIZE (1 << (PCNET32_LOG_TX_BUFFERS))
- #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
- #define TX_RING_LEN_BITS ((PCNET32_LOG_TX_BUFFERS) << 12)
- #define RX_RING_SIZE (1 << (PCNET32_LOG_RX_BUFFERS))
- #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
- #define RX_RING_LEN_BITS ((PCNET32_LOG_RX_BUFFERS) << 4)
- #define PKT_BUF_SZ 1544
- /* Offsets from base I/O address. */
- #define PCNET32_WIO_RDP 0x10
- #define PCNET32_WIO_RAP 0x12
- #define PCNET32_WIO_RESET 0x14
- #define PCNET32_WIO_BDP 0x16
- #define PCNET32_DWIO_RDP 0x10
- #define PCNET32_DWIO_RAP 0x14
- #define PCNET32_DWIO_RESET 0x18
- #define PCNET32_DWIO_BDP 0x1C
- #define PCNET32_TOTAL_SIZE 0x20
- #define CRC_POLYNOMIAL_LE 0xedb88320UL /* Ethernet CRC, little endian */
- /* 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;
- };
- /* PCnet32 access functions */
- struct pcnet32_access {
- u16 (*read_csr)(unsigned long, int);
- void (*write_csr)(unsigned long, int, u16);
- u16 (*read_bcr)(unsigned long, int);
- void (*write_bcr)(unsigned long, int, u16);
- u16 (*read_rap)(unsigned long);
- void (*write_rap)(unsigned long, u16);
- void (*reset)(unsigned long);
- };
- /*
- * The first three fields of pcnet32_private are read by the ethernet device
- * so we allocate the structure should be allocated by pci_alloc_consistent().
- */
- 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;
- dma_addr_t dma_addr; /* DMA address of beginning of this object, returned by pci_alloc_consistent */
- struct pci_dev *pci_dev; /* Pointer to the associated pci device structure */
- const char *name;
- /* The saved address of a sent-in-place packet/buffer, for skfree(). */
- struct sk_buff *tx_skbuff[TX_RING_SIZE];
- struct sk_buff *rx_skbuff[RX_RING_SIZE];
- dma_addr_t tx_dma_addr[TX_RING_SIZE];
- dma_addr_t rx_dma_addr[RX_RING_SIZE];
- struct pcnet32_access a;
- spinlock_t lock; /* Guard lock */
- unsigned int cur_rx, cur_tx; /* The next free ring entry */
- unsigned int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */
- struct net_device_stats stats;
- char tx_full;
- int options;
- int shared_irq:1, /* shared irq possible */
- ltint:1,
- #ifdef DO_DXSUFLO
- dxsuflo:1, /* disable transmit stop on uflo */
- #endif
- mii:1; /* mii port available */
- struct net_device *next;
- struct mii_if_info mii_if;
- };
- static int pcnet32_probe_vlbus(int cards_found);
- static int pcnet32_probe_pci(struct pci_dev *, const struct pci_device_id *);
- static int pcnet32_probe1(unsigned long, unsigned char, int, int, struct pci_dev *);
- static int pcnet32_open(struct net_device *);
- static int pcnet32_init_ring(struct net_device *);
- static int pcnet32_start_xmit(struct sk_buff *, struct net_device *);
- static int pcnet32_rx(struct net_device *);
- static void pcnet32_tx_timeout (struct net_device *dev);
- static void pcnet32_interrupt(int, void *, struct pt_regs *);
- static int pcnet32_close(struct net_device *);
- static struct net_device_stats *pcnet32_get_stats(struct net_device *);
- static void pcnet32_set_multicast_list(struct net_device *);
- static int pcnet32_ioctl(struct net_device *, struct ifreq *, int);
- static int mdio_read(struct net_device *dev, int phy_id, int reg_num);
- static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val);
- enum pci_flags_bit {
- PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4,
- PCI_ADDR0=0x10<<0, PCI_ADDR1=0x10<<1, PCI_ADDR2=0x10<<2, PCI_ADDR3=0x10<<3,
- };
- struct pcnet32_pci_id_info {
- const char *name;
- u16 vendor_id, device_id, svid, sdid, flags;
- int io_size;
- int (*probe1) (unsigned long, unsigned char, int, int, struct pci_dev *);
- };
- MODULE_DEVICE_TABLE (pci, pcnet32_pci_tbl);
- static u16 pcnet32_wio_read_csr (unsigned long addr, int index)
- {
- outw (index, addr+PCNET32_WIO_RAP);
- return inw (addr+PCNET32_WIO_RDP);
- }
- static void pcnet32_wio_write_csr (unsigned long addr, int index, u16 val)
- {
- outw (index, addr+PCNET32_WIO_RAP);
- outw (val, addr+PCNET32_WIO_RDP);
- }
- static u16 pcnet32_wio_read_bcr (unsigned long addr, int index)
- {
- outw (index, addr+PCNET32_WIO_RAP);
- return inw (addr+PCNET32_WIO_BDP);
- }
- static void pcnet32_wio_write_bcr (unsigned long addr, int index, u16 val)
- {
- outw (index, addr+PCNET32_WIO_RAP);
- outw (val, addr+PCNET32_WIO_BDP);
- }
- static u16 pcnet32_wio_read_rap (unsigned long addr)
- {
- return inw (addr+PCNET32_WIO_RAP);
- }
- static void pcnet32_wio_write_rap (unsigned long addr, u16 val)
- {
- outw (val, addr+PCNET32_WIO_RAP);
- }
- static void pcnet32_wio_reset (unsigned long addr)
- {
- inw (addr+PCNET32_WIO_RESET);
- }
- static int pcnet32_wio_check (unsigned long addr)
- {
- outw (88, addr+PCNET32_WIO_RAP);
- return (inw (addr+PCNET32_WIO_RAP) == 88);
- }
- static struct pcnet32_access pcnet32_wio = {
- pcnet32_wio_read_csr,
- pcnet32_wio_write_csr,
- pcnet32_wio_read_bcr,
- pcnet32_wio_write_bcr,
- pcnet32_wio_read_rap,
- pcnet32_wio_write_rap,
- pcnet32_wio_reset
- };
- static u16 pcnet32_dwio_read_csr (unsigned long addr, int index)
- {
- outl (index, addr+PCNET32_DWIO_RAP);
- return (inl (addr+PCNET32_DWIO_RDP) & 0xffff);
- }
- static void pcnet32_dwio_write_csr (unsigned long addr, int index, u16 val)
- {
- outl (index, addr+PCNET32_DWIO_RAP);
- outl (val, addr+PCNET32_DWIO_RDP);
- }
- static u16 pcnet32_dwio_read_bcr (unsigned long addr, int index)
- {
- outl (index, addr+PCNET32_DWIO_RAP);
- return (inl (addr+PCNET32_DWIO_BDP) & 0xffff);
- }
- static void pcnet32_dwio_write_bcr (unsigned long addr, int index, u16 val)
- {
- outl (index, addr+PCNET32_DWIO_RAP);
- outl (val, addr+PCNET32_DWIO_BDP);
- }
- static u16 pcnet32_dwio_read_rap (unsigned long addr)
- {
- return (inl (addr+PCNET32_DWIO_RAP) & 0xffff);
- }
- static void pcnet32_dwio_write_rap (unsigned long addr, u16 val)
- {
- outl (val, addr+PCNET32_DWIO_RAP);
- }
- static void pcnet32_dwio_reset (unsigned long addr)
- {
- inl (addr+PCNET32_DWIO_RESET);
- }
- static int pcnet32_dwio_check (unsigned long addr)
- {
- outl (88, addr+PCNET32_DWIO_RAP);
- return ((inl (addr+PCNET32_DWIO_RAP) & 0xffff) == 88);
- }
- static struct pcnet32_access pcnet32_dwio = {
- pcnet32_dwio_read_csr,
- pcnet32_dwio_write_csr,
- pcnet32_dwio_read_bcr,
- pcnet32_dwio_write_bcr,
- pcnet32_dwio_read_rap,
- pcnet32_dwio_write_rap,
- pcnet32_dwio_reset
- };
- /* only probes for non-PCI devices, the rest are handled by pci_register_driver via pcnet32_probe_pci*/
- static int __init pcnet32_probe_vlbus(int cards_found)
- {
- unsigned long ioaddr = 0; // FIXME dev ? dev->base_addr: 0;
- unsigned int irq_line = 0; // FIXME dev ? dev->irq : 0;
- int *port;
-
- printk(KERN_INFO "pcnet32_probe_vlbus: cards_found=%dn", cards_found);
- #ifndef __powerpc__
- if (ioaddr > 0x1ff) {
- if (check_region(ioaddr, PCNET32_TOTAL_SIZE) == 0)
- return pcnet32_probe1(ioaddr, irq_line, 0, 0, NULL);
- else
- return -ENODEV;
- } else
- #endif
- if (ioaddr != 0)
- return -ENXIO;
-
- /* now look for PCnet32 VLB cards */
- for (port = pcnet32_portlist; *port; port++) {
- unsigned long ioaddr = *port;
-
- if ( check_region(ioaddr, PCNET32_TOTAL_SIZE) == 0) {
- /* check if there is really a pcnet chip on that ioaddr */
- if ((inb(ioaddr + 14) == 0x57) &&
- (inb(ioaddr + 15) == 0x57) &&
- (pcnet32_probe1(ioaddr, 0, 0, 0, NULL) == 0))
- cards_found++;
- }
- }
- return cards_found ? 0: -ENODEV;
- }
- static int __devinit
- pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent)
- {
- static int card_idx;
- long ioaddr;
- int err = 0;
- printk(KERN_INFO "pcnet32_probe_pci: found device %#08x.%#08xn", ent->vendor, ent->device);
- if ((err = pci_enable_device(pdev)) < 0) {
- printk(KERN_ERR "pcnet32.c: failed to enable device -- err=%dn", err);
- return err;
- }
- pci_set_master(pdev);
- ioaddr = pci_resource_start (pdev, 0);
- printk(KERN_INFO " ioaddr=%#08lx resource_flags=%#08lxn", ioaddr, pci_resource_flags (pdev, 0));
- if (!ioaddr) {
- printk (KERN_ERR "no PCI IO resources, abortingn");
- return -ENODEV;
- }
-
- if (!pci_dma_supported(pdev, PCNET32_DMA_MASK)) {
- printk(KERN_ERR "pcnet32.c: architecture does not support 32bit PCI busmaster DMAn");
- return -ENODEV;
- }
- return pcnet32_probe1(ioaddr, pdev->irq, 1, card_idx, pdev);
- }
- /* pcnet32_probe1
- * Called from both pcnet32_probe_vlbus and pcnet_probe_pci.
- * pdev will be NULL when called from pcnet32_probe_vlbus.
- */
- static int __devinit
- pcnet32_probe1(unsigned long ioaddr, unsigned char irq_line, int shared, int card_idx, struct pci_dev *pdev)
- {
- struct pcnet32_private *lp;
- struct resource *res;
- dma_addr_t lp_dma_addr;
- int i,media,fdx = 0, mii = 0, fset = 0;
- #ifdef DO_DXSUFLO
- int dxsuflo = 0;
- #endif
- int ltint = 0;
- int chip_version;
- char *chipname;
- struct net_device *dev;
- struct pcnet32_access *a = NULL;
- /* reset the chip */
- pcnet32_dwio_reset(ioaddr);
- pcnet32_wio_reset(ioaddr);
- /* NOTE: 16-bit check is first, otherwise some older PCnet chips fail */
- if (pcnet32_wio_read_csr (ioaddr, 0) == 4 && pcnet32_wio_check (ioaddr)) {
- a = &pcnet32_wio;
- } else {
- if (pcnet32_dwio_read_csr (ioaddr, 0) == 4 && pcnet32_dwio_check(ioaddr)) {
- a = &pcnet32_dwio;
- } else
- return -ENODEV;
- }
- chip_version = a->read_csr (ioaddr, 88) | (a->read_csr (ioaddr,89) << 16);
- if (pcnet32_debug > 2)
- printk(KERN_INFO " PCnet chip version is %#x.n", chip_version);
- if ((chip_version & 0xfff) != 0x003)
- return -ENODEV;
- chip_version = (chip_version >> 12) & 0xffff;
- switch (chip_version) {
- case 0x2420:
- chipname = "PCnet/PCI 79C970"; /* PCI */
- break;
- case 0x2430:
- if (shared)
- chipname = "PCnet/PCI 79C970"; /* 970 gives the wrong chip id back */
- else
- chipname = "PCnet/32 79C965"; /* 486/VL bus */
- break;
- case 0x2621:
- chipname = "PCnet/PCI II 79C970A"; /* PCI */
- fdx = 1;
- break;
- case 0x2623:
- chipname = "PCnet/FAST 79C971"; /* PCI */
- fdx = 1; mii = 1; fset = 1;
- ltint = 1;
- break;
- case 0x2624:
- chipname = "PCnet/FAST+ 79C972"; /* PCI */
- fdx = 1; mii = 1; fset = 1;
- break;
- case 0x2625:
- chipname = "PCnet/FAST III 79C973"; /* PCI */
- fdx = 1; mii = 1;
- break;
- case 0x2626:
- chipname = "PCnet/Home 79C978"; /* PCI */
- fdx = 1;
- /*
- * This is based on specs published at www.amd.com. This section
- * assumes that a card with a 79C978 wants to go into 1Mb HomePNA
- * mode. The 79C978 can also go into standard ethernet, and there
- * probably should be some sort of module option to select the
- * mode by which the card should operate
- */
- /* switch to home wiring mode */
- media = a->read_bcr (ioaddr, 49);
- #if 0
- if (pcnet32_debug > 2)
- printk(KERN_DEBUG "pcnet32: pcnet32 media value %#x.n", media);
- media &= ~3;
- media |= 1;
- #endif
- if (pcnet32_debug > 2)
- printk(KERN_DEBUG "pcnet32: pcnet32 media reset to %#x.n", media);
- a->write_bcr (ioaddr, 49, media);
- break;
- case 0x2627:
- chipname = "PCnet/FAST III 79C975"; /* PCI */
- fdx = 1; mii = 1;
- break;
- default:
- printk(KERN_INFO "pcnet32: PCnet version %#x, no PCnet32 chip.n",chip_version);
- return -ENODEV;
- }
- /*
- * On selected chips turn on the BCR18:NOUFLO bit. This stops transmit
- * starting until the packet is loaded. Strike one for reliability, lose
- * one for latency - although on PCI this isnt a big loss. Older chips
- * have FIFO's smaller than a packet, so you can't do this.
- */
-
- if(fset)
- {
- a->write_bcr(ioaddr, 18, (a->read_bcr(ioaddr, 18) | 0x0800));
- a->write_csr(ioaddr, 80, (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
- #ifdef DO_DXSUFLO
- dxsuflo = 1;
- #endif
- ltint = 1;
- }
-
- dev = init_etherdev(NULL, 0);
- if(dev==NULL)
- return -ENOMEM;
- printk(KERN_INFO "%s: %s at %#3lx,", dev->name, chipname, ioaddr);
- /* In most chips, after a chip reset, the ethernet address is read from the
- * station address PROM at the base address and programmed into the
- * "Physical Address Registers" CSR12-14.
- * As a precautionary measure, we read the PROM values and complain if
- * they disagree with the CSRs. Either way, we use the CSR values, and
- * double check that they are valid.
- */
- for (i = 0; i < 3; i++) {
- unsigned int val;
- val = a->read_csr(ioaddr, i+12) & 0x0ffff;
- /* There may be endianness issues here. */
- dev->dev_addr[2*i] = val & 0x0ff;
- dev->dev_addr[2*i+1] = (val >> 8) & 0x0ff;
- }
- {
- u8 promaddr[6];
- for (i = 0; i < 6; i++) {
- promaddr[i] = inb(ioaddr + i);
- }
- if( memcmp( promaddr, dev->dev_addr, 6) )
- {
- printk(" warning PROM address does not match CSR addressn");
- #if defined(__i386__)
- printk(KERN_WARNING "%s: Probably a Compaq, using the PROM address of", dev->name);
- memcpy(dev->dev_addr, promaddr, 6);
- #elif defined(__powerpc__)
- if (!is_valid_ether_addr(dev->dev_addr)
- && is_valid_ether_addr(promaddr)) {
- printk("n" KERN_WARNING "%s: using PROM address:",
- dev->name);
- memcpy(dev->dev_addr, promaddr, 6);
- }
- #endif
- }
- }
- /* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
- if( !is_valid_ether_addr(dev->dev_addr) )
- for (i = 0; i < 6; i++)
- dev->dev_addr[i]=0;
- for (i = 0; i < 6; i++)
- printk(" %2.2x", dev->dev_addr[i] );
- if (((chip_version + 1) & 0xfffe) == 0x2624) { /* Version 0x2623 or 0x2624 */
- i = a->read_csr(ioaddr, 80) & 0x0C00; /* Check tx_start_pt */
- printk("n" KERN_INFO " tx_start_pt(0x%04x):",i);
- switch(i>>10) {
- case 0: printk(" 20 bytes,"); break;
- case 1: printk(" 64 bytes,"); break;
- case 2: printk(" 128 bytes,"); break;
- case 3: printk("~220 bytes,"); break;
- }
- i = a->read_bcr(ioaddr, 18); /* Check Burst/Bus control */
- printk(" BCR18(%x):",i&0xffff);
- if (i & (1<<5)) printk("BurstWrEn ");
- if (i & (1<<6)) printk("BurstRdEn ");
- if (i & (1<<7)) printk("DWordIO ");
- if (i & (1<<11)) printk("NoUFlow ");
- i = a->read_bcr(ioaddr, 25);
- printk("n" KERN_INFO " SRAMSIZE=0x%04x,",i<<8);
- i = a->read_bcr(ioaddr, 26);
- printk(" SRAM_BND=0x%04x,",i<<8);
- i = a->read_bcr(ioaddr, 27);
- if (i & (1<<14)) printk("LowLatRx");
- }
- dev->base_addr = ioaddr;
- res = request_region(ioaddr, PCNET32_TOTAL_SIZE, chipname);
- if (res == NULL)
- return -EBUSY;
-
- /* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */
- if ((lp = pci_alloc_consistent(pdev, sizeof(*lp), &lp_dma_addr)) == NULL) {
- release_resource(res);
- return -ENOMEM;
- }
- memset(lp, 0, sizeof(*lp));
- lp->dma_addr = lp_dma_addr;
- lp->pci_dev = pdev;
- printk("n" KERN_INFO "pcnet32: pcnet32_private lp=%p lp_dma_addr=%#08x", lp, lp_dma_addr);
- spin_lock_init(&lp->lock);
-
- dev->priv = lp;
- lp->name = chipname;
- lp->shared_irq = shared;
- lp->mii_if.full_duplex = fdx;
- #ifdef DO_DXSUFLO
- lp->dxsuflo = dxsuflo;
- #endif
- lp->ltint = ltint;
- lp->mii = mii;
- if (options[card_idx] > sizeof (options_mapping))
- lp->options = PCNET32_PORT_ASEL;
- else
- lp->options = options_mapping[options[card_idx]];
- lp->mii_if.dev = dev;
- lp->mii_if.mdio_read = mdio_read;
- lp->mii_if.mdio_write = mdio_write;
-
- if (fdx && !(lp->options & PCNET32_PORT_ASEL) && full_duplex[card_idx])
- lp->options |= PCNET32_PORT_FD;
-
- if (a == NULL) {
- printk(KERN_ERR "pcnet32: No access methodsn");
- pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
- release_resource(res);
- return -ENODEV;
- }
- lp->a = *a;
-
- /* detect special T1/E1 WAN card by checking for MAC address */
- if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0 && dev->dev_addr[2] == 0x75)
- lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
- 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(lp->dma_addr + offsetof(struct pcnet32_private, rx_ring));
- lp->init_block.tx_ring = (u32)le32_to_cpu(lp->dma_addr + offsetof(struct pcnet32_private, tx_ring));
-
- /* switch pcnet32 to 32bit mode */
- a->write_bcr (ioaddr, 20, 2);
- a->write_csr (ioaddr, 1, (lp->dma_addr + offsetof(struct pcnet32_private, init_block)) & 0xffff);
- a->write_csr (ioaddr, 2, (lp->dma_addr + offsetof(struct pcnet32_private, init_block)) >> 16);
-
- if (irq_line) {
- dev->irq = irq_line;
- }
-
- if (dev->irq >= 2)
- printk(" assigned IRQ %d.n", dev->irq);
- else {
- unsigned long irq_mask = probe_irq_on();
-
- /*
- * To auto-IRQ we enable the initialization-done and DMA error
- * interrupts. For ISA boards we get a DMA error, but VLB and PCI
- * boards will work.
- */
- /* Trigger an initialization just for the interrupt. */
- a->write_csr (ioaddr, 0, 0x41);
- mdelay (1);
-
- dev->irq = probe_irq_off (irq_mask);
- if (dev->irq)
- printk(", probed IRQ %d.n", dev->irq);
- else {
- printk(", failed to detect IRQ line.n");
- pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
- release_resource(res);
- return -ENODEV;
- }
- }
- if (pcnet32_debug > 0)
- printk(KERN_INFO "%s", 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;
- dev->do_ioctl = &pcnet32_ioctl;
- dev->tx_timeout = pcnet32_tx_timeout;
- dev->watchdog_timeo = (HZ >> 1);
- lp->next = pcnet32_dev;
- pcnet32_dev = dev;
- /* Fill in the generic fields of the device structure. */
- ether_setup(dev);
- return 0;
- }
- static int
- pcnet32_open(struct net_device *dev)
- {
- struct pcnet32_private *lp = dev->priv;
- unsigned long ioaddr = dev->base_addr;
- u16 val;
- int i;
- if (dev->irq == 0 ||
- request_irq(dev->irq, &pcnet32_interrupt,
- lp->shared_irq ? SA_SHIRQ : 0, lp->name, (void *)dev)) {
- return -EAGAIN;
- }
- /* Check for a valid station address */
- if( !is_valid_ether_addr(dev->dev_addr) )
- return -EINVAL;
- /* Reset the PCNET32 */
- lp->a.reset (ioaddr);
- /* switch pcnet32 to 32bit mode */
- lp->a.write_bcr (ioaddr, 20, 2);
- if (pcnet32_debug > 1)
- printk(KERN_DEBUG "%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.n",
- dev->name, dev->irq,
- (u32) (lp->dma_addr + offsetof(struct pcnet32_private, tx_ring)),
- (u32) (lp->dma_addr + offsetof(struct pcnet32_private, rx_ring)),
- (u32) (lp->dma_addr + offsetof(struct pcnet32_private, init_block)));
-
- /* set/reset autoselect bit */
- val = lp->a.read_bcr (ioaddr, 2) & ~2;
- if (lp->options & PCNET32_PORT_ASEL)
- val |= 2;
- lp->a.write_bcr (ioaddr, 2, val);
-
- /* handle full duplex setting */
- if (lp->mii_if.full_duplex) {
- val = lp->a.read_bcr (ioaddr, 9) & ~3;
- if (lp->options & PCNET32_PORT_FD) {
- val |= 1;
- if (lp->options == (PCNET32_PORT_FD | PCNET32_PORT_AUI))
- val |= 2;
- }
- lp->a.write_bcr (ioaddr, 9, val);
- }
-
- /* set/reset GPSI bit in test register */
- val = lp->a.read_csr (ioaddr, 124) & ~0x10;
- if ((lp->options & PCNET32_PORT_PORTSEL) == PCNET32_PORT_GPSI)
- val |= 0x10;
- lp->a.write_csr (ioaddr, 124, val);
-
- if (lp->mii && !(lp->options & PCNET32_PORT_ASEL)) {
- val = lp->a.read_bcr (ioaddr, 32) & ~0x38; /* disable Auto Negotiation, set 10Mpbs, HD */
- if (lp->options & PCNET32_PORT_FD)
- val |= 0x10;
- if (lp->options & PCNET32_PORT_100)
- val |= 0x08;
- lp->a.write_bcr (ioaddr, 32, val);
- } else {
- if (lp->options & PCNET32_PORT_ASEL) { /* enable auto negotiate, setup, disable fd */
- val = lp->a.read_bcr(ioaddr, 32) & ~0x98;
- val |= 0x20;
- lp->a.write_bcr(ioaddr, 32, val);
- }
- }
- #ifdef DO_DXSUFLO
- if (lp->dxsuflo) { /* Disable transmit stop on underflow */
- val = lp->a.read_csr (ioaddr, 3);
- val |= 0x40;
- lp->a.write_csr (ioaddr, 3, val);
- }
- #endif
- if (lp->ltint) { /* Enable TxDone-intr inhibitor */
- val = lp->a.read_csr (ioaddr, 5);
- val |= (1<<14);
- lp->a.write_csr (ioaddr, 5, val);
- }
-
- lp->init_block.mode = le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
- lp->init_block.filter[0] = 0x00000000;
- lp->init_block.filter[1] = 0x00000000;
- if (pcnet32_init_ring(dev))
- return -ENOMEM;
-
- /* Re-initialize the PCNET32, and start it when done. */
- lp->a.write_csr (ioaddr, 1, (lp->dma_addr + offsetof(struct pcnet32_private, init_block)) &0xffff);
- lp->a.write_csr (ioaddr, 2, (lp->dma_addr + offsetof(struct pcnet32_private, init_block)) >> 16);
- lp->a.write_csr (ioaddr, 4, 0x0915);
- lp->a.write_csr (ioaddr, 0, 0x0001);
- netif_start_queue(dev);
- i = 0;
- while (i++ < 100)
- if (lp->a.read_csr (ioaddr, 0) & 0x0100)
- break;
- /*
- * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
- * reports that doing so triggers a bug in the '974.
- */
- lp->a.write_csr (ioaddr, 0, 0x0042);
- if (pcnet32_debug > 2)
- printk(KERN_DEBUG "%s: pcnet32 open after %d ticks, init block %#x csr0 %4.4x.n",
- dev->name, i, (u32) (lp->dma_addr + offsetof(struct pcnet32_private, init_block)),
- lp->a.read_csr (ioaddr, 0));
- MOD_INC_USE_COUNT;
-
- 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 net_device *dev)
- {
- struct pcnet32_private *lp = dev->priv;
- int i;
- for (i = 0; i < TX_RING_SIZE; i++) {
- if (lp->tx_skbuff[i]) {
- pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i], lp->tx_skbuff[i]->len, PCI_DMA_TODEVICE);
- dev_kfree_skb(lp->tx_skbuff[i]);
- lp->tx_skbuff[i] = NULL;
- lp->tx_dma_addr[i] = 0;
- }
- }
- }
- /* Initialize the PCNET32 Rx and Tx rings. */
- static int
- pcnet32_init_ring(struct net_device *dev)
- {
- struct pcnet32_private *lp = dev->priv;
- int i;
- 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++) {
- struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
- if (rx_skbuff == NULL) {
- if (!(rx_skbuff = lp->rx_skbuff[i] = dev_alloc_skb (PKT_BUF_SZ))) {
- /* there is not much, we can do at this point */
- printk(KERN_ERR "%s: pcnet32_init_ring dev_alloc_skb failed.n",dev->name);
- return -1;
- }
- skb_reserve (rx_skbuff, 2);
- }
- lp->rx_dma_addr[i] = pci_map_single(lp->pci_dev, rx_skbuff->tail, rx_skbuff->len, PCI_DMA_FROMDEVICE);
- lp->rx_ring[i].base = (u32)le32_to_cpu(lp->rx_dma_addr[i]);
- 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->tx_dma_addr[i] = 0;
- }
- 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.rx_ring = (u32)le32_to_cpu(lp->dma_addr + offsetof(struct pcnet32_private, rx_ring));
- lp->init_block.tx_ring = (u32)le32_to_cpu(lp->dma_addr + offsetof(struct pcnet32_private, tx_ring));
- return 0;
- }
- static void
- pcnet32_restart(struct net_device *dev, unsigned int csr0_bits)
- {
- struct pcnet32_private *lp = dev->priv;
- unsigned long ioaddr = dev->base_addr;
- int i;
-
- pcnet32_purge_tx_ring(dev);
- if (pcnet32_init_ring(dev))
- return;
-
- /* ReInit Ring */
- lp->a.write_csr (ioaddr, 0, 1);
- i = 0;
- while (i++ < 100)
- if (lp->a.read_csr (ioaddr, 0) & 0x0100)
- break;
- lp->a.write_csr (ioaddr, 0, csr0_bits);
- }
- static void
- pcnet32_tx_timeout (struct net_device *dev)
- {
- struct pcnet32_private *lp = dev->priv;
- unsigned int ioaddr = dev->base_addr;
- /* Transmitter timeout, serious problems. */
- printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.n",
- dev->name, lp->a.read_csr (ioaddr, 0));
- lp->a.write_csr (ioaddr, 0, 0x0004);
- lp->stats.tx_errors++;
- if (pcnet32_debug > 2) {
- int i;
- printk(KERN_DEBUG " 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");
- }
- pcnet32_restart(dev, 0x0042);
- dev->trans_start = jiffies;
- netif_start_queue(dev);
- }
- static int
- pcnet32_start_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- struct pcnet32_private *lp = dev->priv;
- unsigned int ioaddr = dev->base_addr;
- u16 status;
- int entry;
- unsigned long flags;
- if (pcnet32_debug > 3) {
- printk(KERN_DEBUG "%s: pcnet32_start_xmit() called, csr0 %4.4x.n",
- dev->name, lp->a.read_csr (ioaddr, 0));
- }
- spin_lock_irqsave(&lp->lock, flags);
- /* Default status -- will not enable Successful-TxDone
- * interrupt when that option is available to us.
- */
- status = 0x8300;
- if ((lp->ltint) &&
- ((lp->cur_tx - lp->dirty_tx == TX_RING_SIZE/2) ||
- (lp->cur_tx - lp->dirty_tx >= TX_RING_SIZE-2)))
- {
- /* Enable Successful-TxDone interrupt if we have
- * 1/2 of, or nearly all of, our ring buffer Tx'd
- * but not yet cleaned up. Thus, most of the time,
- * we will not enable Successful-TxDone interrupts.
- */
- status = 0x9300;
- }
-
- /* 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_dma_addr[entry] = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
- lp->tx_ring[entry].base = (u32)le32_to_cpu(lp->tx_dma_addr[entry]);
- lp->tx_ring[entry].status = le16_to_cpu(status);
- lp->cur_tx++;
- lp->stats.tx_bytes += skb->len;
- /* Trigger an immediate send poll. */
- lp->a.write_csr (ioaddr, 0, 0x0048);
- dev->trans_start = jiffies;
- if (lp->tx_ring[(entry+1) & TX_RING_MOD_MASK].base == 0)
- netif_start_queue(dev);
- else {
- lp->tx_full = 1;
- netif_stop_queue(dev);
- }
- spin_unlock_irqrestore(&lp->lock, flags);
- return 0;
- }
- /* The PCNET32 interrupt handler. */
- static void
- pcnet32_interrupt(int irq, void *dev_id, struct pt_regs * regs)
- {
- struct net_device *dev = dev_id;
- struct pcnet32_private *lp;
- unsigned long ioaddr;
- u16 csr0,rap;
- int boguscnt = max_interrupt_work;
- int must_restart;
- if (dev == NULL) {
- printk (KERN_DEBUG "pcnet32_interrupt(): irq %d for unknown device.n", irq);
- return;
- }
- ioaddr = dev->base_addr;
- lp = dev->priv;
-
- spin_lock(&lp->lock);
-
- rap = lp->a.read_rap(ioaddr);
- while ((csr0 = lp->a.read_csr (ioaddr, 0)) & 0x8600 && --boguscnt >= 0) {
- /* Acknowledge all of the current interrupt sources ASAP. */
- lp->a.write_csr (ioaddr, 0, csr0 & ~0x004f);
- must_restart = 0;
- if (pcnet32_debug > 5)
- printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.n",
- dev->name, csr0, lp->a.read_csr (ioaddr, 0));
- if (csr0 & 0x0400) /* Rx interrupt */
- pcnet32_rx(dev);
- if (csr0 & 0x0200) { /* Tx-done interrupt */
- unsigned 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 = le32_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++;
- #ifndef DO_DXSUFLO
- if (err_status & 0x40000000) {
- lp->stats.tx_fifo_errors++;
- /* Ackk! On FIFO errors the Tx unit is turned off! */
- /* Remove this verbosity later! */
- printk(KERN_ERR "%s: Tx FIFO error! CSR0=%4.4xn",
- dev->name, csr0);
- must_restart = 1;
- }
- #else
- if (err_status & 0x40000000) {
- lp->stats.tx_fifo_errors++;
- if (! lp->dxsuflo) { /* If controller doesn't recover ... */
- /* Ackk! On FIFO errors the Tx unit is turned off! */
- /* Remove this verbosity later! */
- printk(KERN_ERR "%s: Tx FIFO error! CSR0=%4.4xn",
- dev->name, csr0);
- must_restart = 1;
- }
- }
- #endif
- } else {
- if (status & 0x1800)
- lp->stats.collisions++;
- lp->stats.tx_packets++;
- }
- /* We must free the original skb */
- if (lp->tx_skbuff[entry]) {
- pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[entry], lp->tx_skbuff[entry]->len, PCI_DMA_TODEVICE);
- dev_kfree_skb_irq(lp->tx_skbuff[entry]);
- lp->tx_skbuff[entry] = 0;
- lp->tx_dma_addr[entry] = 0;
- }
- dirty_tx++;
- }
- #ifndef final_version
- if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
- printk(KERN_ERR "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 &&
- netif_queue_stopped(dev) &&
- dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
- /* The ring is no longer full, clear tbusy. */
- lp->tx_full = 0;
- netif_wake_queue (dev);
- }
- 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 sometimes 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(KERN_ERR "%s: Bus master arbitration failure, status %4.4x.n",
- dev->name, csr0);
- /* unlike for the lance, there is no restart needed */
- }
- if (must_restart) {
- /* stop the chip to clear the error condition, then restart */
- lp->a.write_csr (ioaddr, 0, 0x0004);
- pcnet32_restart(dev, 0x0002);
- }
- }
- /* Clear any other interrupt, and set interrupt enable. */
- lp->a.write_csr (ioaddr, 0, 0x7940);
- lp->a.write_rap(ioaddr,rap);
-
- if (pcnet32_debug > 4)
- printk(KERN_DEBUG "%s: exiting interrupt, csr0=%#4.4x.n",
- dev->name, lp->a.read_csr (ioaddr, 0));
- spin_unlock(&lp->lock);
- }
- static int
- pcnet32_rx(struct net_device *dev)
- {
- struct pcnet32_private *lp = dev->priv;
- int entry = lp->cur_rx & RX_RING_MOD_MASK;
- /* 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(KERN_ERR "%s: Runt packet!n",dev->name);
- lp->stats.rx_errors++;
- } else {
- int rx_in_place = 0;
- if (pkt_len > rx_copybreak) {
- struct sk_buff *newskb;
-
- if ((newskb = dev_alloc_skb (PKT_BUF_SZ))) {
- skb_reserve (newskb, 2);
- skb = lp->rx_skbuff[entry];
- skb_put (skb, pkt_len);
- lp->rx_skbuff[entry] = newskb;
- newskb->dev = dev;
- lp->rx_dma_addr[entry] = pci_map_single(lp->pci_dev, newskb->tail, newskb->len, PCI_DMA_FROMDEVICE);
- lp->rx_ring[entry].base = le32_to_cpu(lp->rx_dma_addr[entry]);
- rx_in_place = 1;
- } else
- skb = NULL;
- } else {
- skb = dev_alloc_skb(pkt_len+2);
- }
-
- if (skb == NULL) {
- int i;
- printk(KERN_ERR "%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;
- if (!rx_in_place) {
- skb_reserve(skb,2); /* 16 byte align */
- skb_put(skb,pkt_len); /* Make room */
- eth_copy_and_sum(skb,
- (unsigned char *)(lp->rx_skbuff[entry]->tail),
- pkt_len,0);
- }
- lp->stats.rx_bytes += skb->len;
- 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;
- }
- return 0;
- }
- static int
- pcnet32_close(struct net_device *dev)
- {
- unsigned long ioaddr = dev->base_addr;
- struct pcnet32_private *lp = dev->priv;
- int i;
- netif_stop_queue(dev);
- lp->stats.rx_missed_errors = lp->a.read_csr (ioaddr, 112);
- if (pcnet32_debug > 1)
- printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.n",
- dev->name, lp->a.read_csr (ioaddr, 0));
- /* We stop the PCNET32 here -- it occasionally polls memory if we don't. */
- lp->a.write_csr (ioaddr, 0, 0x0004);
- /*
- * Switch back to 16bit mode to avoid problems with dumb
- * DOS packet driver after a warm reboot
- */
- lp->a.write_bcr (ioaddr, 20, 4);
- free_irq(dev->irq, dev);
-
- /* free all allocated skbuffs */
- for (i = 0; i < RX_RING_SIZE; i++) {
- lp->rx_ring[i].status = 0;
- if (lp->rx_skbuff[i]) {
- pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i], lp->rx_skbuff[i]->len, PCI_DMA_FROMDEVICE);
- dev_kfree_skb(lp->rx_skbuff[i]);
- }
- lp->rx_skbuff[i] = NULL;
- lp->rx_dma_addr[i] = 0;
- }
-
- for (i = 0; i < TX_RING_SIZE; i++) {
- if (lp->tx_skbuff[i]) {
- pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i], lp->tx_skbuff[i]->len, PCI_DMA_TODEVICE);
- dev_kfree_skb(lp->tx_skbuff[i]);
- }
- lp->tx_skbuff[i] = NULL;
- lp->tx_dma_addr[i] = 0;
- }
-
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static struct net_device_stats *
- pcnet32_get_stats(struct net_device *dev)
- {
- struct pcnet32_private *lp = dev->priv;
- unsigned long ioaddr = dev->base_addr;
- u16 saved_addr;
- unsigned long flags;
- spin_lock_irqsave(&lp->lock, flags);
- saved_addr = lp->a.read_rap(ioaddr);
- lp->stats.rx_missed_errors = lp->a.read_csr (ioaddr, 112);
- lp->a.write_rap(ioaddr, saved_addr);
- spin_unlock_irqrestore(&lp->lock, flags);
- return &lp->stats;
- }
- /* taken from the sunlance driver, which it took from the depca driver */
- static void pcnet32_load_multicast (struct net_device *dev)
- {
- struct pcnet32_private *lp = dev->priv;
- volatile struct pcnet32_init_block *ib = &lp->init_block;
- volatile u16 *mcast_table = (u16 *)&ib->filter;
- struct dev_mc_list *dmi=dev->mc_list;
- char *addrs;
- int i, j, bit, byte;
- u32 crc, poly = CRC_POLYNOMIAL_LE;
-
- /* set all multicast bits */
- if (dev->flags & IFF_ALLMULTI){
- ib->filter [0] = 0xffffffff;
- ib->filter [1] = 0xffffffff;
- return;
- }
- /* clear the multicast filter */
- ib->filter [0] = 0;
- ib->filter [1] = 0;
- /* Add addresses */
- for (i = 0; i < dev->mc_count; i++){
- addrs = dmi->dmi_addr;
- dmi = dmi->next;
-
- /* multicast address? */
- if (!(*addrs & 1))
- continue;
-
- crc = 0xffffffff;
- for (byte = 0; byte < 6; byte++)
- for (bit = *addrs++, j = 0; j < 8; j++, bit >>= 1) {
- int test;
-
- test = ((bit ^ crc) & 0x01);
- crc >>= 1;
-
- if (test) {
- crc = crc ^ poly;
- }
- }
-
- crc = crc >> 26;
- mcast_table [crc >> 4] |= 1 << (crc & 0xf);
- }
- return;
- }
- /*
- * Set or clear the multicast filter for this adaptor.
- */
- static void pcnet32_set_multicast_list(struct net_device *dev)
- {
- unsigned long ioaddr = dev->base_addr;
- struct pcnet32_private *lp = dev->priv;
- if (dev->flags&IFF_PROMISC) {
- /* Log any net taps. */
- printk(KERN_INFO "%s: Promiscuous mode enabled.n", dev->name);
- lp->init_block.mode = le16_to_cpu(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) << 7);
- } else {
- lp->init_block.mode = le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
- pcnet32_load_multicast (dev);
- }
-
- lp->a.write_csr (ioaddr, 0, 0x0004); /* Temporarily stop the lance. */
- pcnet32_restart(dev, 0x0042); /* Resume normal operation */
- }
- static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
- {
- struct pcnet32_private *lp = dev->priv;
- unsigned long ioaddr = dev->base_addr;
- u16 val_out;
- int phyaddr;
- if (!lp->mii)
- return 0;
-
- phyaddr = lp->a.read_bcr(ioaddr, 33);
- lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
- val_out = lp->a.read_bcr(ioaddr, 34);
- lp->a.write_bcr(ioaddr, 33, phyaddr);
-
- return val_out;
- }
- static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
- {
- struct pcnet32_private *lp = dev->priv;
- unsigned long ioaddr = dev->base_addr;
- int phyaddr;
- if (!lp->mii)
- return;
-
- phyaddr = lp->a.read_bcr(ioaddr, 33);
- lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
- lp->a.write_bcr(ioaddr, 34, val);
- lp->a.write_bcr(ioaddr, 33, phyaddr);
- }
- static int pcnet32_ethtool_ioctl (struct net_device *dev, void *useraddr)
- {
- struct pcnet32_private *lp = dev->priv;
- u32 ethcmd;
- int phyaddr = 0;
- int phy_id = 0;
- unsigned long ioaddr = dev->base_addr;
- if (lp->mii) {
- phyaddr = lp->a.read_bcr (ioaddr, 33);
- phy_id = (phyaddr >> 5) & 0x1f;
- lp->mii_if.phy_id = phy_id;
- }
- if (copy_from_user (ðcmd, useraddr, sizeof (ethcmd)))
- return -EFAULT;
- switch (ethcmd) {
- case ETHTOOL_GDRVINFO: {
- struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
- strcpy (info.driver, DRV_NAME);
- strcpy (info.version, DRV_VERSION);
- if (lp->pci_dev)
- strcpy (info.bus_info, lp->pci_dev->slot_name);
- else
- sprintf(info.bus_info, "VLB 0x%lx", dev->base_addr);
- if (copy_to_user (useraddr, &info, sizeof (info)))
- return -EFAULT;
- return 0;
- }
- /* get settings */
- case ETHTOOL_GSET: {
- struct ethtool_cmd ecmd = { ETHTOOL_GSET };
- spin_lock_irq(&lp->lock);
- mii_ethtool_gset(&lp->mii_if, &ecmd);
- spin_unlock_irq(&lp->lock);
- if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
- return -EFAULT;
- return 0;
- }
- /* set settings */
- case ETHTOOL_SSET: {
- int r;
- struct ethtool_cmd ecmd;
- if (copy_from_user(&ecmd, useraddr, sizeof(ecmd)))
- return -EFAULT;
- spin_lock_irq(&lp->lock);
- r = mii_ethtool_sset(&lp->mii_if, &ecmd);
- spin_unlock_irq(&lp->lock);
- return r;
- }
- /* restart autonegotiation */
- case ETHTOOL_NWAY_RST: {
- return mii_nway_restart(&lp->mii_if);
- }
- /* get link status */
- case ETHTOOL_GLINK: {
- struct ethtool_value edata = {ETHTOOL_GLINK};
- edata.data = mii_link_ok(&lp->mii_if);
- if (copy_to_user(useraddr, &edata, sizeof(edata)))
- return -EFAULT;
- return 0;
- }
- /* get message-level */
- case ETHTOOL_GMSGLVL: {
- struct ethtool_value edata = {ETHTOOL_GMSGLVL};
- edata.data = pcnet32_debug;
- if (copy_to_user(useraddr, &edata, sizeof(edata)))
- return -EFAULT;
- return 0;
- }
- /* set message-level */
- case ETHTOOL_SMSGLVL: {
- struct ethtool_value edata;
- if (copy_from_user(&edata, useraddr, sizeof(edata)))
- return -EFAULT;
- pcnet32_debug = edata.data;
- return 0;
- }
- default:
- break;
- }
- return -EOPNOTSUPP;
- }
- static int pcnet32_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
- {
- unsigned long ioaddr = dev->base_addr;
- struct pcnet32_private *lp = dev->priv;
- struct mii_ioctl_data *data = (struct mii_ioctl_data *)&rq->ifr_data;
- int phyaddr = lp->a.read_bcr (ioaddr, 33);
- if (cmd == SIOCETHTOOL)
- return pcnet32_ethtool_ioctl(dev, (void *) rq->ifr_data);
- if (lp->mii) {
- switch(cmd) {
- case SIOCGMIIPHY: /* Get address of MII PHY in use. */
- case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
- data->phy_id = (phyaddr >> 5) & 0x1f;
- /* Fall Through */
- case SIOCGMIIREG: /* Read MII PHY register. */
- case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
- lp->a.write_bcr (ioaddr, 33, ((data->phy_id & 0x1f) << 5) | (data->reg_num & 0x1f));
- data->val_out = lp->a.read_bcr (ioaddr, 34);
- lp->a.write_bcr (ioaddr, 33, phyaddr);
- return 0;
- case SIOCSMIIREG: /* Write MII PHY register. */
- case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- lp->a.write_bcr (ioaddr, 33, ((data->phy_id & 0x1f) << 5) | (data->reg_num & 0x1f));
- lp->a.write_bcr (ioaddr, 34, data->val_in);
- lp->a.write_bcr (ioaddr, 33, phyaddr);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- }
- return -EOPNOTSUPP;
- }
-
- static struct pci_driver pcnet32_driver = {
- name: DRV_NAME,
- probe: pcnet32_probe_pci,
- remove: NULL,
- id_table: pcnet32_pci_tbl,
- };
- MODULE_PARM(debug, "i");
- MODULE_PARM(max_interrupt_work, "i");
- MODULE_PARM(rx_copybreak, "i");
- MODULE_PARM(tx_start_pt, "i");
- MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
- MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
- MODULE_AUTHOR("Thomas Bogendoerfer");
- MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
- MODULE_LICENSE("GPL");
- /* An additional parameter that may be passed in... */
- static int debug = -1;
- static int tx_start_pt = -1;
- static int __init pcnet32_init_module(void)
- {
- int cards_found = 0;
- int err;
- if (debug > 0)
- pcnet32_debug = debug;
- if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
- tx_start = tx_start_pt;
-
- pcnet32_dev = NULL;
- /* find the PCI devices */
- #define USE_PCI_REGISTER_DRIVER
- #ifdef USE_PCI_REGISTER_DRIVER
- if ((err = pci_module_init(&pcnet32_driver)) < 0 )
- return err;
- #else
- {
- struct pci_device_id *devid = pcnet32_pci_tbl;
- for (devid = pcnet32_pci_tbl; devid != NULL && devid->vendor != 0; devid++) {
- struct pci_dev *pdev = pci_find_subsys(devid->vendor, devid->device, devid->subvendor, devid->subdevice, NULL);
- if (pdev != NULL) {
- if (pcnet32_probe_pci(pdev, devid) >= 0) {
- cards_found++;
- }
- }
- }
- }
- #endif
- return 0;
- /* find any remaining VLbus devices */
- return pcnet32_probe_vlbus(cards_found);
- }
- static void __exit pcnet32_cleanup_module(void)
- {
- struct net_device *next_dev;
- /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
- while (pcnet32_dev) {
- struct pcnet32_private *lp = pcnet32_dev->priv;
- next_dev = lp->next;
- unregister_netdev(pcnet32_dev);
- release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
- if (lp->pci_dev != NULL)
- pci_unregister_driver(&pcnet32_driver);
- pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
- kfree(pcnet32_dev);
- pcnet32_dev = next_dev;
- }
- }
- module_init(pcnet32_init_module);
- module_exit(pcnet32_cleanup_module);
- /*
- * Local variables:
- * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c pcnet32.c"
- * c-indent-level: 4
- * tab-width: 8
- * End:
- */