sundance.c
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- /* sundance.c: A Linux device driver for the Sundance ST201 "Alta". */
- /*
- Written 1999-2000 by Donald Becker.
- This software may be used and distributed according to the terms of
- the GNU General Public License (GPL), incorporated herein by reference.
- Drivers based on or derived from this code fall under the GPL and must
- retain the authorship, copyright and license notice. This file is not
- a complete program and may only be used when the entire operating
- system is licensed under the GPL.
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
- Support and updates available at
- http://www.scyld.com/network/sundance.html
- Version 1.01a (jgarzik):
- - Replace some MII-related magic numbers with constants
- Version 1.01b (D-Link):
- - Add new board to PCI ID list
-
- */
- #define DRV_NAME "sundance"
- #define DRV_VERSION "1.01b"
- #define DRV_RELDATE "17-Jan-2002"
- /* The user-configurable values.
- These may be modified when a driver module is loaded.*/
- static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
- /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
- static int max_interrupt_work = 30;
- static int mtu;
- /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
- Typical is a 64 element hash table based on the Ethernet CRC. */
- static int multicast_filter_limit = 32;
- /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
- Setting to > 1518 effectively disables this feature.
- This chip can receive into offset buffers, so the Alpha does not
- need a copy-align. */
- static int rx_copybreak;
- /* media[] specifies the media type the NIC operates at.
- autosense Autosensing active media.
- 10mbps_hd 10Mbps half duplex.
- 10mbps_fd 10Mbps full duplex.
- 100mbps_hd 100Mbps half duplex.
- 100mbps_fd 100Mbps full duplex.
- 0 Autosensing active media.
- 1 10Mbps half duplex.
- 2 10Mbps full duplex.
- 3 100Mbps half duplex.
- 4 100Mbps full duplex.
- */
- #define MAX_UNITS 8
- static char *media[MAX_UNITS];
- /* Operational parameters that are set at compile time. */
- /* Keep the ring sizes a power of two for compile efficiency.
- The compiler will convert <unsigned>'%'<2^N> into a bit mask.
- Making the Tx ring too large decreases the effectiveness of channel
- bonding and packet priority, and more than 128 requires modifying the
- Tx error recovery.
- Large receive rings merely waste memory. */
- #define TX_RING_SIZE 16
- #define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */
- #define RX_RING_SIZE 32
- #define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct netdev_desc)
- #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct netdev_desc)
- /* Operational parameters that usually are not changed. */
- /* Time in jiffies before concluding the transmitter is hung. */
- #define TX_TIMEOUT (4*HZ)
- #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
- #ifndef __KERNEL__
- #define __KERNEL__
- #endif
- #if !defined(__OPTIMIZE__)
- #warning You must compile this file with the correct options!
- #warning See the last lines of the source file.
- #error You must compile this driver with "-O".
- #endif
- /* Include files, designed to support most kernel versions 2.0.0 and later. */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/timer.h>
- #include <linux/errno.h>
- #include <linux/ioport.h>
- #include <linux/slab.h>
- #include <linux/interrupt.h>
- #include <linux/pci.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #include <linux/init.h>
- #include <linux/ethtool.h>
- #include <linux/mii.h>
- #include <asm/uaccess.h>
- #include <asm/processor.h> /* Processor type for cache alignment. */
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <linux/delay.h>
- #include <linux/spinlock.h>
- /* These identify the driver base version and may not be removed. */
- static char version[] __devinitdata =
- KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Written by Donald Beckern"
- KERN_INFO " http://www.scyld.com/network/sundance.htmln";
- MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
- MODULE_DESCRIPTION("Sundance Alta Ethernet driver");
- MODULE_LICENSE("GPL");
- MODULE_PARM(max_interrupt_work, "i");
- MODULE_PARM(mtu, "i");
- MODULE_PARM(debug, "i");
- MODULE_PARM(rx_copybreak, "i");
- MODULE_PARM(media, "1-" __MODULE_STRING(MAX_UNITS) "s");
- MODULE_PARM_DESC(max_interrupt_work, "Sundance Alta maximum events handled per interrupt");
- MODULE_PARM_DESC(mtu, "Sundance Alta MTU (all boards)");
- MODULE_PARM_DESC(debug, "Sundance Alta debug level (0-5)");
- MODULE_PARM_DESC(rx_copybreak, "Sundance Alta copy breakpoint for copy-only-tiny-frames");
- /*
- Theory of Operation
- I. Board Compatibility
- This driver is designed for the Sundance Technologies "Alta" ST201 chip.
- II. Board-specific settings
- III. Driver operation
- IIIa. Ring buffers
- This driver uses two statically allocated fixed-size descriptor lists
- formed into rings by a branch from the final descriptor to the beginning of
- the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
- Some chips explicitly use only 2^N sized rings, while others use a
- 'next descriptor' pointer that the driver forms into rings.
- IIIb/c. Transmit/Receive Structure
- This driver uses a zero-copy receive and transmit scheme.
- The driver allocates full frame size skbuffs for the Rx ring buffers at
- open() time and passes the skb->data field to the chip as receive data
- buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
- a fresh skbuff is allocated and the frame is copied to the new skbuff.
- When the incoming frame is larger, the skbuff is passed directly up the
- protocol stack. Buffers consumed this way are replaced by newly allocated
- skbuffs in a later phase of receives.
- The RX_COPYBREAK value is chosen to trade-off the memory wasted by
- using a full-sized skbuff for small frames vs. the copying costs of larger
- frames. New boards are typically used in generously configured machines
- and the underfilled buffers have negligible impact compared to the benefit of
- a single allocation size, so the default value of zero results in never
- copying packets. When copying is done, the cost is usually mitigated by using
- a combined copy/checksum routine. Copying also preloads the cache, which is
- most useful with small frames.
- A subtle aspect of the operation is that the IP header at offset 14 in an
- ethernet frame isn't longword aligned for further processing.
- Unaligned buffers are permitted by the Sundance hardware, so
- frames are received into the skbuff at an offset of "+2", 16-byte aligning
- the IP header.
- IIId. Synchronization
- The driver runs as two independent, single-threaded flows of control. One
- is the send-packet routine, which enforces single-threaded use by the
- dev->tbusy flag. The other thread is the interrupt handler, which is single
- threaded by the hardware and interrupt handling software.
- The send packet thread has partial control over the Tx ring and 'dev->tbusy'
- flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
- queue slot is empty, it clears the tbusy flag when finished otherwise it sets
- the 'lp->tx_full' flag.
- The interrupt handler has exclusive control over the Rx ring and records stats
- from the Tx ring. After reaping the stats, it marks the Tx queue entry as
- empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it
- clears both the tx_full and tbusy flags.
- IV. Notes
- IVb. References
- The Sundance ST201 datasheet, preliminary version.
- http://cesdis.gsfc.nasa.gov/linux/misc/100mbps.html
- http://cesdis.gsfc.nasa.gov/linux/misc/NWay.html
- IVc. Errata
- */
- enum pci_id_flags_bits {
- /* Set PCI command register bits before calling probe1(). */
- PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4,
- /* Read and map the single following PCI BAR. */
- PCI_ADDR0=0<<4, PCI_ADDR1=1<<4, PCI_ADDR2=2<<4, PCI_ADDR3=3<<4,
- PCI_ADDR_64BITS=0x100, PCI_NO_ACPI_WAKE=0x200, PCI_NO_MIN_LATENCY=0x400,
- };
- enum chip_capability_flags {CanHaveMII=1, };
- #ifdef USE_IO_OPS
- #define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_IO | PCI_ADDR0)
- #else
- #define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR1)
- #endif
- static struct pci_device_id sundance_pci_tbl[] __devinitdata = {
- {0x1186, 0x1002, 0x1186, 0x1002, 0, 0, 0},
- {0x1186, 0x1002, 0x1186, 0x1003, 0, 0, 1},
- {0x1186, 0x1002, 0x1186, 0x1012, 0, 0, 2},
- {0x1186, 0x1002, 0x1186, 0x1040, 0, 0, 3},
- {0x1186, 0x1002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
- {0x13F0, 0x0201, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5},
- {0,}
- };
- MODULE_DEVICE_TABLE(pci, sundance_pci_tbl);
- struct pci_id_info {
- const char *name;
- struct match_info {
- int pci, pci_mask, subsystem, subsystem_mask;
- int revision, revision_mask; /* Only 8 bits. */
- } id;
- enum pci_id_flags_bits pci_flags;
- int io_size; /* Needed for I/O region check or ioremap(). */
- int drv_flags; /* Driver use, intended as capability flags. */
- };
- static struct pci_id_info pci_id_tbl[] = {
- {"D-Link DFE-550TX FAST Ethernet Adapter", {0x10021186, 0xffffffff,},
- PCI_IOTYPE, 128, CanHaveMII},
- {"D-Link DFE-550FX 100Mbps Fiber-optics Adapter",
- {0x10031186, 0xffffffff,},
- PCI_IOTYPE, 128, CanHaveMII},
- {"D-Link DFE-580TX 4 port Server Adapter", {0x10121186, 0xffffffff,},
- PCI_IOTYPE, 128, CanHaveMII},
- {"D-Link DFE-530TXS FAST Ethernet Adapter", {0x10021186, 0xffffffff,},
- PCI_IOTYPE, 128, CanHaveMII},
- {"D-Link DL10050-based FAST Ethernet Adapter",
- {0x10021186, 0xffffffff,},
- PCI_IOTYPE, 128, CanHaveMII},
- {"Sundance Technology Alta", {0x020113F0, 0xffffffff,},
- PCI_IOTYPE, 128, CanHaveMII},
- {0,}, /* 0 terminated list. */
- };
- /* This driver was written to use PCI memory space, however x86-oriented
- hardware often uses I/O space accesses. */
- #ifdef USE_IO_OPS
- #undef readb
- #undef readw
- #undef readl
- #undef writeb
- #undef writew
- #undef writel
- #define readb inb
- #define readw inw
- #define readl inl
- #define writeb outb
- #define writew outw
- #define writel outl
- #endif
- /* Offsets to the device registers.
- Unlike software-only systems, device drivers interact with complex hardware.
- It's not useful to define symbolic names for every register bit in the
- device. The name can only partially document the semantics and make
- the driver longer and more difficult to read.
- In general, only the important configuration values or bits changed
- multiple times should be defined symbolically.
- */
- enum alta_offsets {
- DMACtrl = 0x00,
- TxListPtr = 0x04,
- TxDMACtrl = 0x08,
- TxDescPoll = 0x0a,
- RxDMAStatus = 0x0c,
- RxListPtr = 0x10,
- RxDMACtrl = 0x14,
- RxDescPoll = 0x16,
- LEDCtrl = 0x1a,
- ASICCtrl = 0x30,
- EEData = 0x34,
- EECtrl = 0x36,
- TxThreshold = 0x3c,
- FlashAddr = 0x40,
- FlashData = 0x44,
- TxStatus = 0x46,
- DownCounter = 0x18,
- IntrClear = 0x4a,
- IntrEnable = 0x4c,
- IntrStatus = 0x4e,
- MACCtrl0 = 0x50,
- MACCtrl1 = 0x52,
- StationAddr = 0x54,
- MaxTxSize = 0x5A,
- RxMode = 0x5c,
- MIICtrl = 0x5e,
- MulticastFilter0 = 0x60,
- MulticastFilter1 = 0x64,
- RxOctetsLow = 0x68,
- RxOctetsHigh = 0x6a,
- TxOctetsLow = 0x6c,
- TxOctetsHigh = 0x6e,
- TxFramesOK = 0x70,
- RxFramesOK = 0x72,
- StatsCarrierError = 0x74,
- StatsLateColl = 0x75,
- StatsMultiColl = 0x76,
- StatsOneColl = 0x77,
- StatsTxDefer = 0x78,
- RxMissed = 0x79,
- StatsTxXSDefer = 0x7a,
- StatsTxAbort = 0x7b,
- StatsBcastTx = 0x7c,
- StatsBcastRx = 0x7d,
- StatsMcastTx = 0x7e,
- StatsMcastRx = 0x7f,
- /* Aliased and bogus values! */
- RxStatus = 0x0c,
- };
- /* Bits in the interrupt status/mask registers. */
- enum intr_status_bits {
- IntrSummary=0x0001, IntrPCIErr=0x0002, IntrMACCtrl=0x0008,
- IntrTxDone=0x0004, IntrRxDone=0x0010, IntrRxStart=0x0020,
- IntrDrvRqst=0x0040,
- StatsMax=0x0080, LinkChange=0x0100,
- IntrTxDMADone=0x0200, IntrRxDMADone=0x0400,
- };
- /* Bits in the RxMode register. */
- enum rx_mode_bits {
- AcceptAllIPMulti=0x20, AcceptMultiHash=0x10, AcceptAll=0x08,
- AcceptBroadcast=0x04, AcceptMulticast=0x02, AcceptMyPhys=0x01,
- };
- /* Bits in MACCtrl. */
- enum mac_ctrl0_bits {
- EnbFullDuplex=0x20, EnbRcvLargeFrame=0x40,
- EnbFlowCtrl=0x100, EnbPassRxCRC=0x200,
- };
- enum mac_ctrl1_bits {
- StatsEnable=0x0020, StatsDisable=0x0040, StatsEnabled=0x0080,
- TxEnable=0x0100, TxDisable=0x0200, TxEnabled=0x0400,
- RxEnable=0x0800, RxDisable=0x1000, RxEnabled=0x2000,
- };
- /* The Rx and Tx buffer descriptors. */
- /* Note that using only 32 bit fields simplifies conversion to big-endian
- architectures. */
- struct netdev_desc {
- u32 next_desc;
- u32 status;
- struct desc_frag { u32 addr, length; } frag[1];
- };
- /* Bits in netdev_desc.status */
- enum desc_status_bits {
- DescOwn=0x8000,
- DescEndPacket=0x4000,
- DescEndRing=0x2000,
- LastFrag=0x80000000,
- DescIntrOnTx=0x8000,
- DescIntrOnDMADone=0x80000000,
- DisableAlign = 0x00000001,
- };
- #define PRIV_ALIGN 15 /* Required alignment mask */
- /* Use __attribute__((aligned (L1_CACHE_BYTES))) to maintain alignment
- within the structure. */
- #define MII_CNT 4
- struct netdev_private {
- /* Descriptor rings first for alignment. */
- struct netdev_desc *rx_ring;
- struct netdev_desc *tx_ring;
- struct sk_buff* rx_skbuff[RX_RING_SIZE];
- struct sk_buff* tx_skbuff[TX_RING_SIZE];
- dma_addr_t tx_ring_dma;
- dma_addr_t rx_ring_dma;
- struct net_device_stats stats;
- struct timer_list timer; /* Media monitoring timer. */
- /* Frequently used values: keep some adjacent for cache effect. */
- spinlock_t lock;
- int chip_id, drv_flags;
- unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
- unsigned int rx_buf_sz; /* Based on MTU+slack. */
- spinlock_t txlock; /* Group with Tx control cache line. */
- struct netdev_desc *last_tx; /* Last Tx descriptor used. */
- unsigned int cur_tx, dirty_tx;
- unsigned int tx_full:1; /* The Tx queue is full. */
- /* These values are keep track of the transceiver/media in use. */
- unsigned int full_duplex:1; /* Full-duplex operation requested. */
- unsigned int medialock:1; /* Do not sense media. */
- unsigned int default_port:4; /* Last dev->if_port value. */
- unsigned int an_enable:1;
- unsigned int speed;
- /* Multicast and receive mode. */
- spinlock_t mcastlock; /* SMP lock multicast updates. */
- u16 mcast_filter[4];
- /* MII transceiver section. */
- int mii_cnt; /* MII device addresses. */
- u16 advertising; /* NWay media advertisement */
- unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */
- struct pci_dev *pci_dev;
- };
- /* The station address location in the EEPROM. */
- #define EEPROM_SA_OFFSET 0x10
- static int eeprom_read(long ioaddr, int location);
- static int mdio_read(struct net_device *dev, int phy_id, int location);
- static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
- static int netdev_open(struct net_device *dev);
- static void check_duplex(struct net_device *dev);
- static void netdev_timer(unsigned long data);
- static void tx_timeout(struct net_device *dev);
- static void init_ring(struct net_device *dev);
- static int start_tx(struct sk_buff *skb, struct net_device *dev);
- static void intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
- static void netdev_error(struct net_device *dev, int intr_status);
- static int netdev_rx(struct net_device *dev);
- static void netdev_error(struct net_device *dev, int intr_status);
- static void set_rx_mode(struct net_device *dev);
- static struct net_device_stats *get_stats(struct net_device *dev);
- static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
- static int netdev_close(struct net_device *dev);
- static int __devinit sundance_probe1 (struct pci_dev *pdev,
- const struct pci_device_id *ent)
- {
- struct net_device *dev;
- struct netdev_private *np;
- static int card_idx;
- int chip_idx = ent->driver_data;
- int irq;
- int i;
- long ioaddr;
- u16 mii_ctl;
- void *ring_space;
- dma_addr_t ring_dma;
- /* when built into the kernel, we only print version if device is found */
- #ifndef MODULE
- static int printed_version;
- if (!printed_version++)
- printk(version);
- #endif
- if (pci_enable_device(pdev))
- return -EIO;
- pci_set_master(pdev);
- irq = pdev->irq;
- dev = alloc_etherdev(sizeof(*np));
- if (!dev)
- return -ENOMEM;
- SET_MODULE_OWNER(dev);
- if (pci_request_regions(pdev, DRV_NAME))
- goto err_out_netdev;
- #ifdef USE_IO_OPS
- ioaddr = pci_resource_start(pdev, 0);
- #else
- ioaddr = pci_resource_start(pdev, 1);
- ioaddr = (long) ioremap (ioaddr, pci_id_tbl[chip_idx].io_size);
- if (!ioaddr)
- goto err_out_res;
- #endif
- for (i = 0; i < 3; i++)
- ((u16 *)dev->dev_addr)[i] =
- le16_to_cpu(eeprom_read(ioaddr, i + EEPROM_SA_OFFSET));
- dev->base_addr = ioaddr;
- dev->irq = irq;
- np = dev->priv;
- np->chip_id = chip_idx;
- np->drv_flags = pci_id_tbl[chip_idx].drv_flags;
- np->pci_dev = pdev;
- spin_lock_init(&np->lock);
- ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
- if (!ring_space)
- goto err_out_cleardev;
- np->tx_ring = (struct netdev_desc *)ring_space;
- np->tx_ring_dma = ring_dma;
- ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
- if (!ring_space)
- goto err_out_unmap_tx;
- np->rx_ring = (struct netdev_desc *)ring_space;
- np->rx_ring_dma = ring_dma;
- /* The chip-specific entries in the device structure. */
- dev->open = &netdev_open;
- dev->hard_start_xmit = &start_tx;
- dev->stop = &netdev_close;
- dev->get_stats = &get_stats;
- dev->set_multicast_list = &set_rx_mode;
- dev->do_ioctl = &netdev_ioctl;
- dev->tx_timeout = &tx_timeout;
- dev->watchdog_timeo = TX_TIMEOUT;
- pci_set_drvdata(pdev, dev);
- if (mtu)
- dev->mtu = mtu;
- i = register_netdev(dev);
- if (i)
- goto err_out_unmap_rx;
- printk(KERN_INFO "%s: %s at 0x%lx, ",
- dev->name, pci_id_tbl[chip_idx].name, ioaddr);
- for (i = 0; i < 5; i++)
- printk("%2.2x:", dev->dev_addr[i]);
- printk("%2.2x, IRQ %d.n", dev->dev_addr[i], irq);
- if (1) {
- int phy, phy_idx = 0;
- np->phys[0] = 1; /* Default setting */
- for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) {
- int mii_status = mdio_read(dev, phy, 1);
- if (mii_status != 0xffff && mii_status != 0x0000) {
- np->phys[phy_idx++] = phy;
- np->advertising = mdio_read(dev, phy, 4);
- printk(KERN_INFO "%s: MII PHY found at address %d, status "
- "0x%4.4x advertising %4.4x.n",
- dev->name, phy, mii_status, np->advertising);
- }
- }
- np->mii_cnt = phy_idx;
- if (phy_idx == 0)
- printk(KERN_INFO "%s: No MII transceiver found!, ASIC status %xn",
- dev->name, readl(ioaddr + ASICCtrl));
- }
- /* Parse override configuration */
- np->an_enable = 1;
- if (card_idx < MAX_UNITS) {
- if (media[card_idx] != NULL) {
- np->an_enable = 0;
- if (strcmp (media[card_idx], "100mbps_fd") == 0 ||
- strcmp (media[card_idx], "4") == 0) {
- np->speed = 100;
- np->full_duplex = 1;
- } else if (strcmp (media[card_idx], "100mbps_hd") == 0
- || strcmp (media[card_idx], "3") == 0) {
- np->speed = 100;
- np->full_duplex = 0;
- } else if (strcmp (media[card_idx], "10mbps_fd") == 0 ||
- strcmp (media[card_idx], "2") == 0) {
- np->speed = 10;
- np->full_duplex = 1;
- } else if (strcmp (media[card_idx], "10mbps_hd") == 0 ||
- strcmp (media[card_idx], "1") == 0) {
- np->speed = 10;
- np->full_duplex = 0;
- } else {
- np->an_enable = 1;
- }
- }
- }
- /* Fibre PHY? */
- if (readl (ioaddr + ASICCtrl) & 0x80) {
- /* Default 100Mbps Full */
- if (np->an_enable) {
- np->speed = 100;
- np->full_duplex = 1;
- np->an_enable = 0;
- }
- }
- /* Reset PHY */
- mdio_write (dev, np->phys[0], MII_BMCR, BMCR_RESET);
- mdelay (300);
- mdio_write (dev, np->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART);
- /* Force media type */
- if (!np->an_enable) {
- mii_ctl = 0;
- mii_ctl |= (np->speed == 100) ? BMCR_SPEED100 : 0;
- mii_ctl |= (np->full_duplex) ? BMCR_FULLDPLX : 0;
- mdio_write (dev, np->phys[0], MII_BMCR, mii_ctl);
- printk (KERN_INFO "Override speed=%d, %s duplexn",
- np->speed, np->full_duplex ? "Full" : "Half");
- }
- /* Perhaps move the reset here? */
- /* Reset the chip to erase previous misconfiguration. */
- if (debug > 1)
- printk("ASIC Control is %x.n", readl(ioaddr + ASICCtrl));
- writew(0x007f, ioaddr + ASICCtrl + 2);
- if (debug > 1)
- printk("ASIC Control is now %x.n", readl(ioaddr + ASICCtrl));
- card_idx++;
- return 0;
- err_out_unmap_rx:
- pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma);
- err_out_unmap_tx:
- pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma);
- err_out_cleardev:
- pci_set_drvdata(pdev, NULL);
- #ifndef USE_IO_OPS
- iounmap((void *)ioaddr);
- err_out_res:
- #endif
- pci_release_regions(pdev);
- err_out_netdev:
- kfree (dev);
- return -ENODEV;
- }
- /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. */
- static int eeprom_read(long ioaddr, int location)
- {
- int boguscnt = 1000; /* Typical 190 ticks. */
- writew(0x0200 | (location & 0xff), ioaddr + EECtrl);
- do {
- if (! (readw(ioaddr + EECtrl) & 0x8000)) {
- return readw(ioaddr + EEData);
- }
- } while (--boguscnt > 0);
- return 0;
- }
- /* MII transceiver control section.
- Read and write the MII registers using software-generated serial
- MDIO protocol. See the MII specifications or DP83840A data sheet
- for details.
- The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
- met by back-to-back 33Mhz PCI cycles. */
- #define mdio_delay() readb(mdio_addr)
- /* Set iff a MII transceiver on any interface requires mdio preamble.
- This only set with older tranceivers, so the extra
- code size of a per-interface flag is not worthwhile. */
- static const char mii_preamble_required = 1;
- enum mii_reg_bits {
- MDIO_ShiftClk=0x0001, MDIO_Data=0x0002, MDIO_EnbOutput=0x0004,
- };
- #define MDIO_EnbIn (0)
- #define MDIO_WRITE0 (MDIO_EnbOutput)
- #define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput)
- /* Generate the preamble required for initial synchronization and
- a few older transceivers. */
- static void mdio_sync(long mdio_addr)
- {
- int bits = 32;
- /* Establish sync by sending at least 32 logic ones. */
- while (--bits >= 0) {
- writeb(MDIO_WRITE1, mdio_addr);
- mdio_delay();
- writeb(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr);
- mdio_delay();
- }
- }
- static int mdio_read(struct net_device *dev, int phy_id, int location)
- {
- long mdio_addr = dev->base_addr + MIICtrl;
- int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
- int i, retval = 0;
- if (mii_preamble_required)
- mdio_sync(mdio_addr);
- /* Shift the read command bits out. */
- for (i = 15; i >= 0; i--) {
- int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
- writeb(dataval, mdio_addr);
- mdio_delay();
- writeb(dataval | MDIO_ShiftClk, mdio_addr);
- mdio_delay();
- }
- /* Read the two transition, 16 data, and wire-idle bits. */
- for (i = 19; i > 0; i--) {
- writeb(MDIO_EnbIn, mdio_addr);
- mdio_delay();
- retval = (retval << 1) | ((readb(mdio_addr) & MDIO_Data) ? 1 : 0);
- writeb(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
- mdio_delay();
- }
- return (retval>>1) & 0xffff;
- }
- static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
- {
- long mdio_addr = dev->base_addr + MIICtrl;
- int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
- int i;
- if (mii_preamble_required)
- mdio_sync(mdio_addr);
- /* Shift the command bits out. */
- for (i = 31; i >= 0; i--) {
- int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
- writeb(dataval, mdio_addr);
- mdio_delay();
- writeb(dataval | MDIO_ShiftClk, mdio_addr);
- mdio_delay();
- }
- /* Clear out extra bits. */
- for (i = 2; i > 0; i--) {
- writeb(MDIO_EnbIn, mdio_addr);
- mdio_delay();
- writeb(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
- mdio_delay();
- }
- return;
- }
- static int netdev_open(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int i;
- /* Do we need to reset the chip??? */
- i = request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev);
- if (i)
- return i;
- if (debug > 1)
- printk(KERN_DEBUG "%s: netdev_open() irq %d.n",
- dev->name, dev->irq);
- init_ring(dev);
- writel(np->rx_ring_dma, ioaddr + RxListPtr);
- /* The Tx list pointer is written as packets are queued. */
- for (i = 0; i < 6; i++)
- writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
- /* Initialize other registers. */
- /* Configure the PCI bus bursts and FIFO thresholds. */
- if (dev->if_port == 0)
- dev->if_port = np->default_port;
- np->mcastlock = (spinlock_t) SPIN_LOCK_UNLOCKED;
- set_rx_mode(dev);
- writew(0, ioaddr + IntrEnable);
- writew(0, ioaddr + DownCounter);
- /* Set the chip to poll every N*320nsec. */
- writeb(100, ioaddr + RxDescPoll);
- writeb(127, ioaddr + TxDescPoll);
- netif_start_queue(dev);
- /* Enable interrupts by setting the interrupt mask. */
- writew(IntrRxDone | IntrRxDMADone | IntrPCIErr | IntrDrvRqst | IntrTxDone
- | StatsMax | LinkChange, ioaddr + IntrEnable);
- writew(StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
- if (debug > 2)
- printk(KERN_DEBUG "%s: Done netdev_open(), status: Rx %x Tx %x "
- "MAC Control %x, %4.4x %4.4x.n",
- dev->name, readl(ioaddr + RxStatus), readb(ioaddr + TxStatus),
- readl(ioaddr + MACCtrl0),
- readw(ioaddr + MACCtrl1), readw(ioaddr + MACCtrl0));
- /* Set the timer to check for link beat. */
- init_timer(&np->timer);
- np->timer.expires = jiffies + 3*HZ;
- np->timer.data = (unsigned long)dev;
- np->timer.function = &netdev_timer; /* timer handler */
- add_timer(&np->timer);
- return 0;
- }
- static void check_duplex(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int mii_lpa = mdio_read(dev, np->phys[0], MII_LPA);
- int negotiated = mii_lpa & np->advertising;
- int duplex;
-
- /* Force media */
- if (!np->an_enable || mii_lpa == 0xffff) {
- if (np->full_duplex)
- writew (readw (ioaddr + MACCtrl0) | EnbFullDuplex,
- ioaddr + MACCtrl0);
- return;
- }
- /* Autonegotiation */
- duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
- if (np->full_duplex != duplex) {
- np->full_duplex = duplex;
- if (debug)
- printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d "
- "negotiated capability %4.4x.n", dev->name,
- duplex ? "full" : "half", np->phys[0], negotiated);
- writew(duplex ? 0x20 : 0, ioaddr + MACCtrl0);
- }
- }
- static void netdev_timer(unsigned long data)
- {
- struct net_device *dev = (struct net_device *)data;
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int next_tick = 10*HZ;
- if (debug > 3) {
- printk(KERN_DEBUG "%s: Media selection timer tick, intr status %4.4x, "
- "Tx %x Rx %x.n",
- dev->name, readw(ioaddr + IntrEnable),
- readb(ioaddr + TxStatus), readl(ioaddr + RxStatus));
- }
- check_duplex(dev);
- np->timer.expires = jiffies + next_tick;
- add_timer(&np->timer);
- }
- static void tx_timeout(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- printk(KERN_WARNING "%s: Transmit timed out, status %2.2x,"
- " resetting...n", dev->name, readb(ioaddr + TxStatus));
- {
- int i;
- printk(KERN_DEBUG " Rx ring %p: ", np->rx_ring);
- for (i = 0; i < RX_RING_SIZE; i++)
- printk(" %8.8x", (unsigned int)np->rx_ring[i].status);
- printk("n"KERN_DEBUG" Tx ring %p: ", np->tx_ring);
- for (i = 0; i < TX_RING_SIZE; i++)
- printk(" %4.4x", np->tx_ring[i].status);
- printk("n");
- }
- /* Perhaps we should reinitialize the hardware here. */
- dev->if_port = 0;
- /* Stop and restart the chip's Tx processes . */
- /* Trigger an immediate transmit demand. */
- writew(IntrRxDone | IntrRxDMADone | IntrPCIErr | IntrDrvRqst | IntrTxDone
- | StatsMax | LinkChange, ioaddr + IntrEnable);
- dev->trans_start = jiffies;
- np->stats.tx_errors++;
- if (!np->tx_full)
- netif_wake_queue(dev);
- }
- /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
- static void init_ring(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- int i;
- np->tx_full = 0;
- np->cur_rx = np->cur_tx = 0;
- np->dirty_rx = np->dirty_tx = 0;
- np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
- /* Initialize all Rx descriptors. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- np->rx_ring[i].next_desc = cpu_to_le32(np->rx_ring_dma +
- ((i+1)%RX_RING_SIZE)*sizeof(*np->rx_ring));
- np->rx_ring[i].status = 0;
- np->rx_ring[i].frag[0].length = 0;
- np->rx_skbuff[i] = 0;
- }
- /* Fill in the Rx buffers. Handle allocation failure gracefully. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
- np->rx_skbuff[i] = skb;
- if (skb == NULL)
- break;
- skb->dev = dev; /* Mark as being used by this device. */
- skb_reserve(skb, 2); /* 16 byte align the IP header. */
- np->rx_ring[i].frag[0].addr = cpu_to_le32(
- pci_map_single(np->pci_dev, skb->tail, np->rx_buf_sz,
- PCI_DMA_FROMDEVICE));
- np->rx_ring[i].frag[0].length = cpu_to_le32(np->rx_buf_sz | LastFrag);
- }
- np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
- for (i = 0; i < TX_RING_SIZE; i++) {
- np->tx_skbuff[i] = 0;
- np->tx_ring[i].status = 0;
- }
- return;
- }
- static int start_tx(struct sk_buff *skb, struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- struct netdev_desc *txdesc;
- unsigned entry;
- /* Note: Ordering is important here, set the field with the
- "ownership" bit last, and only then increment cur_tx. */
- /* Calculate the next Tx descriptor entry. */
- entry = np->cur_tx % TX_RING_SIZE;
- np->tx_skbuff[entry] = skb;
- txdesc = &np->tx_ring[entry];
- txdesc->next_desc = 0;
- /* Note: disable the interrupt generation here before releasing. */
- txdesc->status =
- cpu_to_le32((entry<<2) | DescIntrOnDMADone | DescIntrOnTx | DisableAlign);
- txdesc->frag[0].addr = cpu_to_le32(pci_map_single(np->pci_dev,
- skb->data, skb->len, PCI_DMA_TODEVICE));
- txdesc->frag[0].length = cpu_to_le32(skb->len | LastFrag);
- if (np->last_tx)
- np->last_tx->next_desc = cpu_to_le32(np->tx_ring_dma +
- entry*sizeof(struct netdev_desc));
- np->last_tx = txdesc;
- np->cur_tx++;
- /* On some architectures: explicitly flush cache lines here. */
- if (np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 1) {
- /* do nothing */
- } else {
- np->tx_full = 1;
- netif_stop_queue(dev);
- }
- /* Side effect: The read wakes the potentially-idle transmit channel. */
- if (readl(dev->base_addr + TxListPtr) == 0)
- writel(np->tx_ring_dma + entry*sizeof(*np->tx_ring),
- dev->base_addr + TxListPtr);
- dev->trans_start = jiffies;
- if (debug > 4) {
- printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.n",
- dev->name, np->cur_tx, entry);
- }
- return 0;
- }
- /* The interrupt handler does all of the Rx thread work and cleans up
- after the Tx thread. */
- static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
- {
- struct net_device *dev = (struct net_device *)dev_instance;
- struct netdev_private *np;
- long ioaddr;
- int boguscnt = max_interrupt_work;
- ioaddr = dev->base_addr;
- np = dev->priv;
- spin_lock(&np->lock);
- do {
- int intr_status = readw(ioaddr + IntrStatus);
- writew(intr_status & (IntrRxDone | IntrRxDMADone | IntrPCIErr |
- IntrDrvRqst | IntrTxDone | IntrTxDMADone | StatsMax |
- LinkChange), ioaddr + IntrStatus);
- if (debug > 4)
- printk(KERN_DEBUG "%s: Interrupt, status %4.4x.n",
- dev->name, intr_status);
- if (intr_status == 0)
- break;
- if (intr_status & (IntrRxDone|IntrRxDMADone))
- netdev_rx(dev);
- if (intr_status & IntrTxDone) {
- int boguscnt = 32;
- int tx_status = readw(ioaddr + TxStatus);
- while (tx_status & 0x80) {
- if (debug > 4)
- printk("%s: Transmit status is %2.2x.n",
- dev->name, tx_status);
- if (tx_status & 0x1e) {
- np->stats.tx_errors++;
- if (tx_status & 0x10) np->stats.tx_fifo_errors++;
- #ifdef ETHER_STATS
- if (tx_status & 0x08) np->stats.collisions16++;
- #else
- if (tx_status & 0x08) np->stats.collisions++;
- #endif
- if (tx_status & 0x04) np->stats.tx_fifo_errors++;
- if (tx_status & 0x02) np->stats.tx_window_errors++;
- /* This reset has not been verified!. */
- if (tx_status & 0x10) { /* Reset the Tx. */
- writew(0x001c, ioaddr + ASICCtrl + 2);
- #if 0 /* Do we need to reset the Tx pointer here? */
- writel(np->tx_ring_dma
- + np->dirty_tx*sizeof(*np->tx_ring),
- dev->base_addr + TxListPtr);
- #endif
- }
- if (tx_status & 0x1e) /* Restart the Tx. */
- writew(TxEnable, ioaddr + MACCtrl1);
- }
- /* Yup, this is a documentation bug. It cost me *hours*. */
- writew(0, ioaddr + TxStatus);
- tx_status = readb(ioaddr + TxStatus);
- if (--boguscnt < 0)
- break;
- }
- }
- for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
- int entry = np->dirty_tx % TX_RING_SIZE;
- struct sk_buff *skb;
- if ( ! (np->tx_ring[entry].status & 0x00010000))
- break;
- skb = np->tx_skbuff[entry];
- /* Free the original skb. */
- pci_unmap_single(np->pci_dev,
- np->tx_ring[entry].frag[0].addr,
- skb->len, PCI_DMA_TODEVICE);
- dev_kfree_skb_irq(skb);
- np->tx_skbuff[entry] = 0;
- }
- if (np->tx_full
- && np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
- /* The ring is no longer full, clear tbusy. */
- np->tx_full = 0;
- netif_wake_queue(dev);
- }
- /* Abnormal error summary/uncommon events handlers. */
- if (intr_status & (IntrDrvRqst | IntrPCIErr | LinkChange | StatsMax))
- netdev_error(dev, intr_status);
- if (--boguscnt < 0) {
- get_stats(dev);
- if (debug > 1)
- printk(KERN_WARNING "%s: Too much work at interrupt, "
- "status=0x%4.4x / 0x%4.4x.n",
- dev->name, intr_status, readw(ioaddr + IntrClear));
- /* Re-enable us in 3.2msec. */
- writew(0, ioaddr + IntrEnable);
- writew(1000, ioaddr + DownCounter);
- writew(IntrDrvRqst, ioaddr + IntrEnable);
- break;
- }
- } while (1);
- if (debug > 3)
- printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.n",
- dev->name, readw(ioaddr + IntrStatus));
- spin_unlock(&np->lock);
- }
- /* This routine is logically part of the interrupt handler, but separated
- for clarity and better register allocation. */
- static int netdev_rx(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- int entry = np->cur_rx % RX_RING_SIZE;
- int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
- if (debug > 4) {
- printk(KERN_DEBUG " In netdev_rx(), entry %d status %4.4x.n",
- entry, np->rx_ring[entry].status);
- }
- /* If EOP is set on the next entry, it's a new packet. Send it up. */
- while (1) {
- struct netdev_desc *desc = &(np->rx_ring[entry]);
- u32 frame_status;
- int pkt_len;
- if (!(desc->status & DescOwn))
- break;
- frame_status = le32_to_cpu(desc->status);
- pkt_len = frame_status & 0x1fff; /* Chip omits the CRC. */
- if (debug > 4)
- printk(KERN_DEBUG " netdev_rx() status was %8.8x.n",
- frame_status);
- if (--boguscnt < 0)
- break;
- pci_dma_sync_single(np->pci_dev, desc->frag[0].addr,
- np->rx_buf_sz, PCI_DMA_FROMDEVICE);
-
- if (frame_status & 0x001f4000) {
- /* There was a error. */
- if (debug > 2)
- printk(KERN_DEBUG " netdev_rx() Rx error was %8.8x.n",
- frame_status);
- np->stats.rx_errors++;
- if (frame_status & 0x00100000) np->stats.rx_length_errors++;
- if (frame_status & 0x00010000) np->stats.rx_fifo_errors++;
- if (frame_status & 0x00060000) np->stats.rx_frame_errors++;
- if (frame_status & 0x00080000) np->stats.rx_crc_errors++;
- if (frame_status & 0x00100000) {
- printk(KERN_WARNING "%s: Oversized Ethernet frame,"
- " status %8.8x.n",
- dev->name, frame_status);
- }
- } else {
- struct sk_buff *skb;
- #ifndef final_version
- if (debug > 4)
- printk(KERN_DEBUG " netdev_rx() normal Rx pkt length %d"
- ", bogus_cnt %d.n",
- pkt_len, boguscnt);
- #endif
- /* Check if the packet is long enough to accept without copying
- to a minimally-sized skbuff. */
- if (pkt_len < rx_copybreak
- && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
- skb->dev = dev;
- skb_reserve(skb, 2); /* 16 byte align the IP header */
- eth_copy_and_sum(skb, np->rx_skbuff[entry]->tail, pkt_len, 0);
- skb_put(skb, pkt_len);
- } else {
- pci_unmap_single(np->pci_dev,
- desc->frag[0].addr,
- np->rx_buf_sz,
- PCI_DMA_FROMDEVICE);
- skb_put(skb = np->rx_skbuff[entry], pkt_len);
- np->rx_skbuff[entry] = NULL;
- }
- skb->protocol = eth_type_trans(skb, dev);
- /* Note: checksum -> skb->ip_summed = CHECKSUM_UNNECESSARY; */
- netif_rx(skb);
- dev->last_rx = jiffies;
- }
- entry = (++np->cur_rx) % RX_RING_SIZE;
- }
- /* Refill the Rx ring buffers. */
- for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
- struct sk_buff *skb;
- entry = np->dirty_rx % RX_RING_SIZE;
- if (np->rx_skbuff[entry] == NULL) {
- skb = dev_alloc_skb(np->rx_buf_sz);
- np->rx_skbuff[entry] = skb;
- if (skb == NULL)
- break; /* Better luck next round. */
- skb->dev = dev; /* Mark as being used by this device. */
- skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
- np->rx_ring[entry].frag[0].addr = cpu_to_le32(
- pci_map_single(np->pci_dev, skb->tail,
- np->rx_buf_sz, PCI_DMA_FROMDEVICE));
- }
- /* Perhaps we need not reset this field. */
- np->rx_ring[entry].frag[0].length =
- cpu_to_le32(np->rx_buf_sz | LastFrag);
- np->rx_ring[entry].status = 0;
- }
- /* No need to restart Rx engine, it will poll. */
- return 0;
- }
- static void netdev_error(struct net_device *dev, int intr_status)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- u16 mii_ctl, mii_advertise, mii_lpa;
- int speed;
- if (intr_status & IntrDrvRqst) {
- /* Stop the down counter and turn interrupts back on. */
- if (debug > 1)
- printk("%s: Turning interrupts back on.n", dev->name);
- writew(0, ioaddr + IntrEnable);
- writew(0, ioaddr + DownCounter);
- writew(IntrRxDone | IntrRxDMADone | IntrPCIErr | IntrDrvRqst |
- IntrTxDone | StatsMax | LinkChange, ioaddr + IntrEnable);
- /* Ack buggy InRequest */
- writew (IntrDrvRqst, ioaddr + IntrStatus);
- }
- if (intr_status & LinkChange) {
- if (np->an_enable) {
- mii_advertise = mdio_read (dev, np->phys[0], MII_ADVERTISE);
- mii_lpa= mdio_read (dev, np->phys[0], MII_LPA);
- mii_advertise &= mii_lpa;
- printk (KERN_INFO "%s: Link changed: ", dev->name);
- if (mii_advertise & ADVERTISE_100FULL)
- printk ("100Mbps, full duplexn");
- else if (mii_advertise & ADVERTISE_100HALF)
- printk ("100Mbps, half duplexn");
- else if (mii_advertise & ADVERTISE_10FULL)
- printk ("10Mbps, full duplexn");
- else if (mii_advertise & ADVERTISE_10HALF)
- printk ("10Mbps, half duplexn");
- else
- printk ("n");
- } else {
- mii_ctl = mdio_read (dev, np->phys[0], MII_BMCR);
- speed = (mii_ctl & BMCR_SPEED100) ? 100 : 10;
- printk (KERN_INFO "%s: Link changed: %dMbps ,",
- dev->name, speed);
- printk ("%s duplex.n", (mii_ctl & BMCR_FULLDPLX) ?
- "full" : "half");
- }
- check_duplex (dev);
- }
- if (intr_status & StatsMax) {
- get_stats(dev);
- }
- if (intr_status & IntrPCIErr) {
- printk(KERN_ERR "%s: Something Wicked happened! %4.4x.n",
- dev->name, intr_status);
- /* We must do a global reset of DMA to continue. */
- }
- }
- static struct net_device_stats *get_stats(struct net_device *dev)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- int i;
- /* We should lock this segment of code for SMP eventually, although
- the vulnerability window is very small and statistics are
- non-critical. */
- /* The chip only need report frame silently dropped. */
- np->stats.rx_missed_errors += readb(ioaddr + RxMissed);
- np->stats.tx_packets += readw(ioaddr + TxFramesOK);
- np->stats.rx_packets += readw(ioaddr + RxFramesOK);
- np->stats.collisions += readb(ioaddr + StatsLateColl);
- np->stats.collisions += readb(ioaddr + StatsMultiColl);
- np->stats.collisions += readb(ioaddr + StatsOneColl);
- readb(ioaddr + StatsCarrierError);
- readb(ioaddr + StatsTxDefer);
- for (i = StatsTxDefer; i <= StatsMcastRx; i++)
- readb(ioaddr + i);
- np->stats.tx_bytes += readw(ioaddr + TxOctetsLow);
- np->stats.tx_bytes += readw(ioaddr + TxOctetsHigh) << 16;
- np->stats.rx_bytes += readw(ioaddr + RxOctetsLow);
- np->stats.rx_bytes += readw(ioaddr + RxOctetsHigh) << 16;
- return &np->stats;
- }
- /* The little-endian AUTODIN II ethernet CRC calculations.
- A big-endian version is also available.
- This is slow but compact code. Do not use this routine for bulk data,
- use a table-based routine instead.
- This is common code and should be moved to net/core/crc.c.
- Chips may use the upper or lower CRC bits, and may reverse and/or invert
- them. Select the endian-ness that results in minimal calculations.
- */
- static unsigned const ethernet_polynomial_le = 0xedb88320U;
- static inline unsigned ether_crc_le(int length, unsigned char *data)
- {
- unsigned int crc = 0xffffffff; /* Initial value. */
- while(--length >= 0) {
- unsigned char current_octet = *data++;
- int bit;
- for (bit = 8; --bit >= 0; current_octet >>= 1) {
- if ((crc ^ current_octet) & 1) {
- crc >>= 1;
- crc ^= ethernet_polynomial_le;
- } else
- crc >>= 1;
- }
- }
- return crc;
- }
- static void set_rx_mode(struct net_device *dev)
- {
- long ioaddr = dev->base_addr;
- u16 mc_filter[4]; /* Multicast hash filter */
- u32 rx_mode;
- int i;
- if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
- /* Unconditionally log net taps. */
- printk(KERN_NOTICE "%s: Promiscuous mode enabled.n", dev->name);
- memset(mc_filter, 0xff, sizeof(mc_filter));
- rx_mode = AcceptBroadcast | AcceptMulticast | AcceptAll | AcceptMyPhys;
- } else if ((dev->mc_count > multicast_filter_limit)
- || (dev->flags & IFF_ALLMULTI)) {
- /* Too many to match, or accept all multicasts. */
- memset(mc_filter, 0xff, sizeof(mc_filter));
- rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
- } else if (dev->mc_count) {
- struct dev_mc_list *mclist;
- memset(mc_filter, 0, sizeof(mc_filter));
- for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
- i++, mclist = mclist->next) {
- set_bit(ether_crc_le(ETH_ALEN, mclist->dmi_addr) & 0x3f,
- mc_filter);
- }
- rx_mode = AcceptBroadcast | AcceptMultiHash | AcceptMyPhys;
- } else {
- writeb(AcceptBroadcast | AcceptMyPhys, ioaddr + RxMode);
- return;
- }
- for (i = 0; i < 4; i++)
- writew(mc_filter[i], ioaddr + MulticastFilter0 + i*2);
- writeb(rx_mode, ioaddr + RxMode);
- }
- static int netdev_ethtool_ioctl(struct net_device *dev, void *useraddr)
- {
- struct netdev_private *np = dev->priv;
- u32 ethcmd;
-
- 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);
- strcpy(info.bus_info, np->pci_dev->slot_name);
- if (copy_to_user(useraddr, &info, sizeof(info)))
- return -EFAULT;
- return 0;
- }
- }
-
- return -EOPNOTSUPP;
- }
- static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
- {
- struct mii_ioctl_data *data = (struct mii_ioctl_data *)&rq->ifr_data;
- switch(cmd) {
- case SIOCETHTOOL:
- return netdev_ethtool_ioctl(dev, (void *) rq->ifr_data);
- case SIOCGMIIPHY: /* Get address of MII PHY in use. */
- case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
- data->phy_id = ((struct netdev_private *)dev->priv)->phys[0] & 0x1f;
- /* Fall Through */
- case SIOCGMIIREG: /* Read MII PHY register. */
- case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
- data->val_out = mdio_read(dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
- 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;
- mdio_write(dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- }
- static int netdev_close(struct net_device *dev)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- struct sk_buff *skb;
- int i;
- netif_stop_queue(dev);
- if (debug > 1) {
- printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %2.2x "
- "Rx %4.4x Int %2.2x.n",
- dev->name, readb(ioaddr + TxStatus),
- readl(ioaddr + RxStatus), readw(ioaddr + IntrStatus));
- printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.n",
- dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
- }
- /* Disable interrupts by clearing the interrupt mask. */
- writew(0x0000, ioaddr + IntrEnable);
- /* Stop the chip's Tx and Rx processes. */
- writew(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1);
- #ifdef __i386__
- if (debug > 2) {
- printk("n"KERN_DEBUG" Tx ring at %8.8x:n",
- (int)(np->tx_ring_dma));
- for (i = 0; i < TX_RING_SIZE; i++)
- printk(" #%d desc. %4.4x %8.8x %8.8x.n",
- i, np->tx_ring[i].status, np->tx_ring[i].frag[0].addr,
- np->tx_ring[i].frag[0].length);
- printk("n"KERN_DEBUG " Rx ring %8.8x:n",
- (int)(np->rx_ring_dma));
- for (i = 0; i < /*RX_RING_SIZE*/4 ; i++) {
- printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8xn",
- i, np->rx_ring[i].status, np->rx_ring[i].frag[0].addr,
- np->rx_ring[i].frag[0].length);
- }
- }
- #endif /* __i386__ debugging only */
- free_irq(dev->irq, dev);
- del_timer_sync(&np->timer);
- /* Free all the skbuffs in the Rx queue. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- np->rx_ring[i].status = 0;
- np->rx_ring[i].frag[0].addr = 0xBADF00D0; /* An invalid address. */
- skb = np->rx_skbuff[i];
- if (skb) {
- pci_unmap_single(np->pci_dev,
- np->rx_ring[i].frag[0].addr, np->rx_buf_sz,
- PCI_DMA_FROMDEVICE);
- dev_kfree_skb(skb);
- np->rx_skbuff[i] = 0;
- }
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- skb = np->tx_skbuff[i];
- if (skb) {
- pci_unmap_single(np->pci_dev,
- np->tx_ring[i].frag[0].addr, skb->len,
- PCI_DMA_TODEVICE);
- dev_kfree_skb(skb);
- np->tx_skbuff[i] = 0;
- }
- }
- return 0;
- }
- static void __devexit sundance_remove1 (struct pci_dev *pdev)
- {
- struct net_device *dev = pci_get_drvdata(pdev);
-
- /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
- if (dev) {
- struct netdev_private *np = dev->priv;
- unregister_netdev(dev);
- pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring,
- np->rx_ring_dma);
- pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring,
- np->tx_ring_dma);
- pci_release_regions(pdev);
- #ifndef USE_IO_OPS
- iounmap((char *)(dev->base_addr));
- #endif
- kfree(dev);
- pci_set_drvdata(pdev, NULL);
- }
- }
- static struct pci_driver sundance_driver = {
- name: DRV_NAME,
- id_table: sundance_pci_tbl,
- probe: sundance_probe1,
- remove: __devexit_p(sundance_remove1),
- };
- static int __init sundance_init(void)
- {
- /* when a module, this is printed whether or not devices are found in probe */
- #ifdef MODULE
- printk(version);
- #endif
- return pci_module_init(&sundance_driver);
- }
- static void __exit sundance_exit(void)
- {
- pci_unregister_driver(&sundance_driver);
- }
- module_init(sundance_init);
- module_exit(sundance_exit);