+++ /dev/null
-/* epic100.c: A SMC 83c170 EPIC/100 Fast Ethernet driver for Linux. */
-/*
- Written/copyright 1997-2001 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.
-
- This driver is for the SMC83c170/175 "EPIC" series, as used on the
- SMC EtherPower II 9432 PCI adapter, and several CardBus cards.
-
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
-
- Information and updates available at
- http://www.scyld.com/network/epic100.html
- [this link no longer provides anything useful -jgarzik]
-
- ---------------------------------------------------------------------
-
-*/
-
-#define DRV_NAME "epic100"
-#define DRV_VERSION "2.1"
-#define DRV_RELDATE "Sept 11, 2006"
-
-/* 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. */
-
-/* Used to pass the full-duplex flag, etc. */
-#define MAX_UNITS 8 /* More are supported, limit only on options */
-static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
-static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
-
-/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
- Setting to > 1518 effectively disables this feature. */
-static int rx_copybreak;
-
-/* Operational parameters that are set at compile time. */
-
-/* Keep the ring sizes a power of two for operational 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.
- There are no ill effects from too-large receive rings. */
-#define TX_RING_SIZE 256
-#define TX_QUEUE_LEN 240 /* Limit ring entries actually used. */
-#define RX_RING_SIZE 256
-#define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct epic_tx_desc)
-#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct epic_rx_desc)
-
-/* Operational parameters that usually are not changed. */
-/* Time in jiffies before concluding the transmitter is hung. */
-#define TX_TIMEOUT (2*HZ)
-
-#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
-
-/* Bytes transferred to chip before transmission starts. */
-/* Initial threshold, increased on underflow, rounded down to 4 byte units. */
-#define TX_FIFO_THRESH 256
-#define RX_FIFO_THRESH 1 /* 0-3, 0==32, 64,96, or 3==128 bytes */
-
-#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/interrupt.h>
-#include <linux/pci.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/ethtool.h>
-#include <linux/mii.h>
-#include <linux/crc32.h>
-#include <linux/bitops.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/byteorder.h>
-
-/* These identify the driver base version and may not be removed. */
-static char version[] __devinitdata =
-DRV_NAME ".c:v1.11 1/7/2001 Written by Donald Becker <becker@scyld.com>\n";
-static char version2[] __devinitdata =
-" (unofficial 2.4.x kernel port, version " DRV_VERSION ", " DRV_RELDATE ")\n";
-
-MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
-MODULE_DESCRIPTION("SMC 83c170 EPIC series Ethernet driver");
-MODULE_LICENSE("GPL");
-
-module_param(debug, int, 0);
-module_param(rx_copybreak, int, 0);
-module_param_array(options, int, NULL, 0);
-module_param_array(full_duplex, int, NULL, 0);
-MODULE_PARM_DESC(debug, "EPIC/100 debug level (0-5)");
-MODULE_PARM_DESC(options, "EPIC/100: Bits 0-3: media type, bit 4: full duplex");
-MODULE_PARM_DESC(rx_copybreak, "EPIC/100 copy breakpoint for copy-only-tiny-frames");
-MODULE_PARM_DESC(full_duplex, "EPIC/100 full duplex setting(s) (1)");
-
-/*
- Theory of Operation
-
-I. Board Compatibility
-
-This device driver is designed for the SMC "EPIC/100", the SMC
-single-chip Ethernet controllers for PCI. This chip is used on
-the SMC EtherPower II boards.
-
-II. Board-specific settings
-
-PCI bus devices are configured by the system at boot time, so no jumpers
-need to be set on the board. The system BIOS will assign the
-PCI INTA signal to a (preferably otherwise unused) system IRQ line.
-Note: Kernel versions earlier than 1.3.73 do not support shared PCI
-interrupt lines.
-
-III. Driver operation
-
-IIIa. Ring buffers
-
-IVb. References
-
-http://www.smsc.com/media/Downloads_Public/discontinued/83c171.pdf
-http://www.smsc.com/media/Downloads_Public/discontinued/83c175.pdf
-http://scyld.com/expert/NWay.html
-http://www.national.com/pf/DP/DP83840A.html
-
-IVc. Errata
-
-*/
-
-
-enum chip_capability_flags { MII_PWRDWN=1, TYPE2_INTR=2, NO_MII=4 };
-
-#define EPIC_TOTAL_SIZE 0x100
-#define USE_IO_OPS 1
-
-typedef enum {
- SMSC_83C170_0,
- SMSC_83C170,
- SMSC_83C175,
-} chip_t;
-
-
-struct epic_chip_info {
- const char *name;
- int drv_flags; /* Driver use, intended as capability flags. */
-};
-
-
-/* indexed by chip_t */
-static const struct epic_chip_info pci_id_tbl[] = {
- { "SMSC EPIC/100 83c170", TYPE2_INTR | NO_MII | MII_PWRDWN },
- { "SMSC EPIC/100 83c170", TYPE2_INTR },
- { "SMSC EPIC/C 83c175", TYPE2_INTR | MII_PWRDWN },
-};
-
-
-static DEFINE_PCI_DEVICE_TABLE(epic_pci_tbl) = {
- { 0x10B8, 0x0005, 0x1092, 0x0AB4, 0, 0, SMSC_83C170_0 },
- { 0x10B8, 0x0005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SMSC_83C170 },
- { 0x10B8, 0x0006, PCI_ANY_ID, PCI_ANY_ID,
- PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, SMSC_83C175 },
- { 0,}
-};
-MODULE_DEVICE_TABLE (pci, epic_pci_tbl);
-
-
-#ifndef USE_IO_OPS
-#undef inb
-#undef inw
-#undef inl
-#undef outb
-#undef outw
-#undef outl
-#define inb readb
-#define inw readw
-#define inl readl
-#define outb writeb
-#define outw writew
-#define outl writel
-#endif
-
-/* Offsets to registers, using the (ugh) SMC names. */
-enum epic_registers {
- COMMAND=0, INTSTAT=4, INTMASK=8, GENCTL=0x0C, NVCTL=0x10, EECTL=0x14,
- PCIBurstCnt=0x18,
- TEST1=0x1C, CRCCNT=0x20, ALICNT=0x24, MPCNT=0x28, /* Rx error counters. */
- MIICtrl=0x30, MIIData=0x34, MIICfg=0x38,
- LAN0=64, /* MAC address. */
- MC0=80, /* Multicast filter table. */
- RxCtrl=96, TxCtrl=112, TxSTAT=0x74,
- PRxCDAR=0x84, RxSTAT=0xA4, EarlyRx=0xB0, PTxCDAR=0xC4, TxThresh=0xDC,
-};
-
-/* Interrupt register bits, using my own meaningful names. */
-enum IntrStatus {
- TxIdle=0x40000, RxIdle=0x20000, IntrSummary=0x010000,
- PCIBusErr170=0x7000, PCIBusErr175=0x1000, PhyEvent175=0x8000,
- RxStarted=0x0800, RxEarlyWarn=0x0400, CntFull=0x0200, TxUnderrun=0x0100,
- TxEmpty=0x0080, TxDone=0x0020, RxError=0x0010,
- RxOverflow=0x0008, RxFull=0x0004, RxHeader=0x0002, RxDone=0x0001,
-};
-enum CommandBits {
- StopRx=1, StartRx=2, TxQueued=4, RxQueued=8,
- StopTxDMA=0x20, StopRxDMA=0x40, RestartTx=0x80,
-};
-
-#define EpicRemoved 0xffffffff /* Chip failed or removed (CardBus) */
-
-#define EpicNapiEvent (TxEmpty | TxDone | \
- RxDone | RxStarted | RxEarlyWarn | RxOverflow | RxFull)
-#define EpicNormalEvent (0x0000ffff & ~EpicNapiEvent)
-
-static const u16 media2miictl[16] = {
- 0, 0x0C00, 0x0C00, 0x2000, 0x0100, 0x2100, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0 };
-
-/*
- * The EPIC100 Rx and Tx buffer descriptors. Note that these
- * really ARE host-endian; it's not a misannotation. We tell
- * the card to byteswap them internally on big-endian hosts -
- * look for #ifdef __BIG_ENDIAN in epic_open().
- */
-
-struct epic_tx_desc {
- u32 txstatus;
- u32 bufaddr;
- u32 buflength;
- u32 next;
-};
-
-struct epic_rx_desc {
- u32 rxstatus;
- u32 bufaddr;
- u32 buflength;
- u32 next;
-};
-
-enum desc_status_bits {
- DescOwn=0x8000,
-};
-
-#define PRIV_ALIGN 15 /* Required alignment mask */
-struct epic_private {
- struct epic_rx_desc *rx_ring;
- struct epic_tx_desc *tx_ring;
- /* The saved address of a sent-in-place packet/buffer, for skfree(). */
- struct sk_buff* tx_skbuff[TX_RING_SIZE];
- /* The addresses of receive-in-place skbuffs. */
- struct sk_buff* rx_skbuff[RX_RING_SIZE];
-
- dma_addr_t tx_ring_dma;
- dma_addr_t rx_ring_dma;
-
- /* Ring pointers. */
- spinlock_t lock; /* Group with Tx control cache line. */
- spinlock_t napi_lock;
- struct napi_struct napi;
- unsigned int reschedule_in_poll;
- unsigned int cur_tx, dirty_tx;
-
- unsigned int cur_rx, dirty_rx;
- u32 irq_mask;
- unsigned int rx_buf_sz; /* Based on MTU+slack. */
-
- struct pci_dev *pci_dev; /* PCI bus location. */
- int chip_id, chip_flags;
-
- struct timer_list timer; /* Media selection timer. */
- int tx_threshold;
- unsigned char mc_filter[8];
- signed char phys[4]; /* MII device addresses. */
- u16 advertising; /* NWay media advertisement */
- int mii_phy_cnt;
- struct mii_if_info mii;
- unsigned int tx_full:1; /* The Tx queue is full. */
- unsigned int default_port:4; /* Last dev->if_port value. */
-};
-
-static int epic_open(struct net_device *dev);
-static int read_eeprom(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 loc, int val);
-static void epic_restart(struct net_device *dev);
-static void epic_timer(unsigned long data);
-static void epic_tx_timeout(struct net_device *dev);
-static void epic_init_ring(struct net_device *dev);
-static netdev_tx_t epic_start_xmit(struct sk_buff *skb,
- struct net_device *dev);
-static int epic_rx(struct net_device *dev, int budget);
-static int epic_poll(struct napi_struct *napi, int budget);
-static irqreturn_t epic_interrupt(int irq, void *dev_instance);
-static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
-static const struct ethtool_ops netdev_ethtool_ops;
-static int epic_close(struct net_device *dev);
-static struct net_device_stats *epic_get_stats(struct net_device *dev);
-static void set_rx_mode(struct net_device *dev);
-
-static const struct net_device_ops epic_netdev_ops = {
- .ndo_open = epic_open,
- .ndo_stop = epic_close,
- .ndo_start_xmit = epic_start_xmit,
- .ndo_tx_timeout = epic_tx_timeout,
- .ndo_get_stats = epic_get_stats,
- .ndo_set_multicast_list = set_rx_mode,
- .ndo_do_ioctl = netdev_ioctl,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int __devinit epic_init_one (struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- static int card_idx = -1;
- long ioaddr;
- int chip_idx = (int) ent->driver_data;
- int irq;
- struct net_device *dev;
- struct epic_private *ep;
- int i, ret, option = 0, duplex = 0;
- 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(KERN_INFO "%s%s", version, version2);
-#endif
-
- card_idx++;
-
- ret = pci_enable_device(pdev);
- if (ret)
- goto out;
- irq = pdev->irq;
-
- if (pci_resource_len(pdev, 0) < EPIC_TOTAL_SIZE) {
- dev_err(&pdev->dev, "no PCI region space\n");
- ret = -ENODEV;
- goto err_out_disable;
- }
-
- pci_set_master(pdev);
-
- ret = pci_request_regions(pdev, DRV_NAME);
- if (ret < 0)
- goto err_out_disable;
-
- ret = -ENOMEM;
-
- dev = alloc_etherdev(sizeof (*ep));
- if (!dev) {
- dev_err(&pdev->dev, "no memory for eth device\n");
- goto err_out_free_res;
- }
- SET_NETDEV_DEV(dev, &pdev->dev);
-
-#ifdef USE_IO_OPS
- ioaddr = pci_resource_start (pdev, 0);
-#else
- ioaddr = pci_resource_start (pdev, 1);
- ioaddr = (long) pci_ioremap_bar(pdev, 1);
- if (!ioaddr) {
- dev_err(&pdev->dev, "ioremap failed\n");
- goto err_out_free_netdev;
- }
-#endif
-
- pci_set_drvdata(pdev, dev);
- ep = netdev_priv(dev);
- ep->mii.dev = dev;
- ep->mii.mdio_read = mdio_read;
- ep->mii.mdio_write = mdio_write;
- ep->mii.phy_id_mask = 0x1f;
- ep->mii.reg_num_mask = 0x1f;
-
- ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
- if (!ring_space)
- goto err_out_iounmap;
- ep->tx_ring = ring_space;
- ep->tx_ring_dma = ring_dma;
-
- ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
- if (!ring_space)
- goto err_out_unmap_tx;
- ep->rx_ring = ring_space;
- ep->rx_ring_dma = ring_dma;
-
- if (dev->mem_start) {
- option = dev->mem_start;
- duplex = (dev->mem_start & 16) ? 1 : 0;
- } else if (card_idx >= 0 && card_idx < MAX_UNITS) {
- if (options[card_idx] >= 0)
- option = options[card_idx];
- if (full_duplex[card_idx] >= 0)
- duplex = full_duplex[card_idx];
- }
-
- dev->base_addr = ioaddr;
- dev->irq = irq;
-
- spin_lock_init(&ep->lock);
- spin_lock_init(&ep->napi_lock);
- ep->reschedule_in_poll = 0;
-
- /* Bring the chip out of low-power mode. */
- outl(0x4200, ioaddr + GENCTL);
- /* Magic?! If we don't set this bit the MII interface won't work. */
- /* This magic is documented in SMSC app note 7.15 */
- for (i = 16; i > 0; i--)
- outl(0x0008, ioaddr + TEST1);
-
- /* Turn on the MII transceiver. */
- outl(0x12, ioaddr + MIICfg);
- if (chip_idx == 1)
- outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
- outl(0x0200, ioaddr + GENCTL);
-
- /* Note: the '175 does not have a serial EEPROM. */
- for (i = 0; i < 3; i++)
- ((__le16 *)dev->dev_addr)[i] = cpu_to_le16(inw(ioaddr + LAN0 + i*4));
-
- if (debug > 2) {
- dev_printk(KERN_DEBUG, &pdev->dev, "EEPROM contents:\n");
- for (i = 0; i < 64; i++)
- printk(" %4.4x%s", read_eeprom(ioaddr, i),
- i % 16 == 15 ? "\n" : "");
- }
-
- ep->pci_dev = pdev;
- ep->chip_id = chip_idx;
- ep->chip_flags = pci_id_tbl[chip_idx].drv_flags;
- ep->irq_mask =
- (ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
- | CntFull | TxUnderrun | EpicNapiEvent;
-
- /* Find the connected MII xcvrs.
- Doing this in open() would allow detecting external xcvrs later, but
- takes much time and no cards have external MII. */
- {
- int phy, phy_idx = 0;
- for (phy = 1; phy < 32 && phy_idx < sizeof(ep->phys); phy++) {
- int mii_status = mdio_read(dev, phy, MII_BMSR);
- if (mii_status != 0xffff && mii_status != 0x0000) {
- ep->phys[phy_idx++] = phy;
- dev_info(&pdev->dev,
- "MII transceiver #%d control "
- "%4.4x status %4.4x.\n",
- phy, mdio_read(dev, phy, 0), mii_status);
- }
- }
- ep->mii_phy_cnt = phy_idx;
- if (phy_idx != 0) {
- phy = ep->phys[0];
- ep->mii.advertising = mdio_read(dev, phy, MII_ADVERTISE);
- dev_info(&pdev->dev,
- "Autonegotiation advertising %4.4x link "
- "partner %4.4x.\n",
- ep->mii.advertising, mdio_read(dev, phy, 5));
- } else if ( ! (ep->chip_flags & NO_MII)) {
- dev_warn(&pdev->dev,
- "***WARNING***: No MII transceiver found!\n");
- /* Use the known PHY address of the EPII. */
- ep->phys[0] = 3;
- }
- ep->mii.phy_id = ep->phys[0];
- }
-
- /* Turn off the MII xcvr (175 only!), leave the chip in low-power mode. */
- if (ep->chip_flags & MII_PWRDWN)
- outl(inl(ioaddr + NVCTL) & ~0x483C, ioaddr + NVCTL);
- outl(0x0008, ioaddr + GENCTL);
-
- /* The lower four bits are the media type. */
- if (duplex) {
- ep->mii.force_media = ep->mii.full_duplex = 1;
- dev_info(&pdev->dev, "Forced full duplex requested.\n");
- }
- dev->if_port = ep->default_port = option;
-
- /* The Epic-specific entries in the device structure. */
- dev->netdev_ops = &epic_netdev_ops;
- dev->ethtool_ops = &netdev_ethtool_ops;
- dev->watchdog_timeo = TX_TIMEOUT;
- netif_napi_add(dev, &ep->napi, epic_poll, 64);
-
- ret = register_netdev(dev);
- if (ret < 0)
- goto err_out_unmap_rx;
-
- printk(KERN_INFO "%s: %s at %#lx, IRQ %d, %pM\n",
- dev->name, pci_id_tbl[chip_idx].name, ioaddr, dev->irq,
- dev->dev_addr);
-
-out:
- return ret;
-
-err_out_unmap_rx:
- pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
-err_out_unmap_tx:
- pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
-err_out_iounmap:
-#ifndef USE_IO_OPS
- iounmap(ioaddr);
-err_out_free_netdev:
-#endif
- free_netdev(dev);
-err_out_free_res:
- pci_release_regions(pdev);
-err_out_disable:
- pci_disable_device(pdev);
- goto out;
-}
-
-/* Serial EEPROM section. */
-
-/* EEPROM_Ctrl bits. */
-#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
-#define EE_CS 0x02 /* EEPROM chip select. */
-#define EE_DATA_WRITE 0x08 /* EEPROM chip data in. */
-#define EE_WRITE_0 0x01
-#define EE_WRITE_1 0x09
-#define EE_DATA_READ 0x10 /* EEPROM chip data out. */
-#define EE_ENB (0x0001 | EE_CS)
-
-/* Delay between EEPROM clock transitions.
- This serves to flush the operation to the PCI bus.
- */
-
-#define eeprom_delay() inl(ee_addr)
-
-/* The EEPROM commands include the alway-set leading bit. */
-#define EE_WRITE_CMD (5 << 6)
-#define EE_READ64_CMD (6 << 6)
-#define EE_READ256_CMD (6 << 8)
-#define EE_ERASE_CMD (7 << 6)
-
-static void epic_disable_int(struct net_device *dev, struct epic_private *ep)
-{
- long ioaddr = dev->base_addr;
-
- outl(0x00000000, ioaddr + INTMASK);
-}
-
-static inline void __epic_pci_commit(long ioaddr)
-{
-#ifndef USE_IO_OPS
- inl(ioaddr + INTMASK);
-#endif
-}
-
-static inline void epic_napi_irq_off(struct net_device *dev,
- struct epic_private *ep)
-{
- long ioaddr = dev->base_addr;
-
- outl(ep->irq_mask & ~EpicNapiEvent, ioaddr + INTMASK);
- __epic_pci_commit(ioaddr);
-}
-
-static inline void epic_napi_irq_on(struct net_device *dev,
- struct epic_private *ep)
-{
- long ioaddr = dev->base_addr;
-
- /* No need to commit possible posted write */
- outl(ep->irq_mask | EpicNapiEvent, ioaddr + INTMASK);
-}
-
-static int __devinit read_eeprom(long ioaddr, int location)
-{
- int i;
- int retval = 0;
- long ee_addr = ioaddr + EECTL;
- int read_cmd = location |
- (inl(ee_addr) & 0x40 ? EE_READ64_CMD : EE_READ256_CMD);
-
- outl(EE_ENB & ~EE_CS, ee_addr);
- outl(EE_ENB, ee_addr);
-
- /* Shift the read command bits out. */
- for (i = 12; i >= 0; i--) {
- short dataval = (read_cmd & (1 << i)) ? EE_WRITE_1 : EE_WRITE_0;
- outl(EE_ENB | dataval, ee_addr);
- eeprom_delay();
- outl(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
- eeprom_delay();
- }
- outl(EE_ENB, ee_addr);
-
- for (i = 16; i > 0; i--) {
- outl(EE_ENB | EE_SHIFT_CLK, ee_addr);
- eeprom_delay();
- retval = (retval << 1) | ((inl(ee_addr) & EE_DATA_READ) ? 1 : 0);
- outl(EE_ENB, ee_addr);
- eeprom_delay();
- }
-
- /* Terminate the EEPROM access. */
- outl(EE_ENB & ~EE_CS, ee_addr);
- return retval;
-}
-
-#define MII_READOP 1
-#define MII_WRITEOP 2
-static int mdio_read(struct net_device *dev, int phy_id, int location)
-{
- long ioaddr = dev->base_addr;
- int read_cmd = (phy_id << 9) | (location << 4) | MII_READOP;
- int i;
-
- outl(read_cmd, ioaddr + MIICtrl);
- /* Typical operation takes 25 loops. */
- for (i = 400; i > 0; i--) {
- barrier();
- if ((inl(ioaddr + MIICtrl) & MII_READOP) == 0) {
- /* Work around read failure bug. */
- if (phy_id == 1 && location < 6 &&
- inw(ioaddr + MIIData) == 0xffff) {
- outl(read_cmd, ioaddr + MIICtrl);
- continue;
- }
- return inw(ioaddr + MIIData);
- }
- }
- return 0xffff;
-}
-
-static void mdio_write(struct net_device *dev, int phy_id, int loc, int value)
-{
- long ioaddr = dev->base_addr;
- int i;
-
- outw(value, ioaddr + MIIData);
- outl((phy_id << 9) | (loc << 4) | MII_WRITEOP, ioaddr + MIICtrl);
- for (i = 10000; i > 0; i--) {
- barrier();
- if ((inl(ioaddr + MIICtrl) & MII_WRITEOP) == 0)
- break;
- }
-}
-
-
-static int epic_open(struct net_device *dev)
-{
- struct epic_private *ep = netdev_priv(dev);
- long ioaddr = dev->base_addr;
- int i;
- int retval;
-
- /* Soft reset the chip. */
- outl(0x4001, ioaddr + GENCTL);
-
- napi_enable(&ep->napi);
- if ((retval = request_irq(dev->irq, epic_interrupt, IRQF_SHARED, dev->name, dev))) {
- napi_disable(&ep->napi);
- return retval;
- }
-
- epic_init_ring(dev);
-
- outl(0x4000, ioaddr + GENCTL);
- /* This magic is documented in SMSC app note 7.15 */
- for (i = 16; i > 0; i--)
- outl(0x0008, ioaddr + TEST1);
-
- /* Pull the chip out of low-power mode, enable interrupts, and set for
- PCI read multiple. The MIIcfg setting and strange write order are
- required by the details of which bits are reset and the transceiver
- wiring on the Ositech CardBus card.
- */
-#if 0
- outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
-#endif
- if (ep->chip_flags & MII_PWRDWN)
- outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
-
- /* Tell the chip to byteswap descriptors on big-endian hosts */
-#ifdef __BIG_ENDIAN
- outl(0x4432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
- inl(ioaddr + GENCTL);
- outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
-#else
- outl(0x4412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
- inl(ioaddr + GENCTL);
- outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
-#endif
-
- udelay(20); /* Looks like EPII needs that if you want reliable RX init. FIXME: pci posting bug? */
-
- for (i = 0; i < 3; i++)
- outl(le16_to_cpu(((__le16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
-
- ep->tx_threshold = TX_FIFO_THRESH;
- outl(ep->tx_threshold, ioaddr + TxThresh);
-
- if (media2miictl[dev->if_port & 15]) {
- if (ep->mii_phy_cnt)
- mdio_write(dev, ep->phys[0], MII_BMCR, media2miictl[dev->if_port&15]);
- if (dev->if_port == 1) {
- if (debug > 1)
- printk(KERN_INFO "%s: Using the 10base2 transceiver, MII "
- "status %4.4x.\n",
- dev->name, mdio_read(dev, ep->phys[0], MII_BMSR));
- }
- } else {
- int mii_lpa = mdio_read(dev, ep->phys[0], MII_LPA);
- if (mii_lpa != 0xffff) {
- if ((mii_lpa & LPA_100FULL) || (mii_lpa & 0x01C0) == LPA_10FULL)
- ep->mii.full_duplex = 1;
- else if (! (mii_lpa & LPA_LPACK))
- mdio_write(dev, ep->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART);
- if (debug > 1)
- printk(KERN_INFO "%s: Setting %s-duplex based on MII xcvr %d"
- " register read of %4.4x.\n", dev->name,
- ep->mii.full_duplex ? "full" : "half",
- ep->phys[0], mii_lpa);
- }
- }
-
- outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
- outl(ep->rx_ring_dma, ioaddr + PRxCDAR);
- outl(ep->tx_ring_dma, ioaddr + PTxCDAR);
-
- /* Start the chip's Rx process. */
- set_rx_mode(dev);
- outl(StartRx | RxQueued, ioaddr + COMMAND);
-
- netif_start_queue(dev);
-
- /* Enable interrupts by setting the interrupt mask. */
- outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
- | CntFull | TxUnderrun
- | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
-
- if (debug > 1)
- printk(KERN_DEBUG "%s: epic_open() ioaddr %lx IRQ %d status %4.4x "
- "%s-duplex.\n",
- dev->name, ioaddr, dev->irq, (int)inl(ioaddr + GENCTL),
- ep->mii.full_duplex ? "full" : "half");
-
- /* Set the timer to switch to check for link beat and perhaps switch
- to an alternate media type. */
- init_timer(&ep->timer);
- ep->timer.expires = jiffies + 3*HZ;
- ep->timer.data = (unsigned long)dev;
- ep->timer.function = epic_timer; /* timer handler */
- add_timer(&ep->timer);
-
- return 0;
-}
-
-/* Reset the chip to recover from a PCI transaction error.
- This may occur at interrupt time. */
-static void epic_pause(struct net_device *dev)
-{
- long ioaddr = dev->base_addr;
-
- netif_stop_queue (dev);
-
- /* Disable interrupts by clearing the interrupt mask. */
- outl(0x00000000, ioaddr + INTMASK);
- /* Stop the chip's Tx and Rx DMA processes. */
- outw(StopRx | StopTxDMA | StopRxDMA, ioaddr + COMMAND);
-
- /* Update the error counts. */
- if (inw(ioaddr + COMMAND) != 0xffff) {
- dev->stats.rx_missed_errors += inb(ioaddr + MPCNT);
- dev->stats.rx_frame_errors += inb(ioaddr + ALICNT);
- dev->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
- }
-
- /* Remove the packets on the Rx queue. */
- epic_rx(dev, RX_RING_SIZE);
-}
-
-static void epic_restart(struct net_device *dev)
-{
- long ioaddr = dev->base_addr;
- struct epic_private *ep = netdev_priv(dev);
- int i;
-
- /* Soft reset the chip. */
- outl(0x4001, ioaddr + GENCTL);
-
- printk(KERN_DEBUG "%s: Restarting the EPIC chip, Rx %d/%d Tx %d/%d.\n",
- dev->name, ep->cur_rx, ep->dirty_rx, ep->dirty_tx, ep->cur_tx);
- udelay(1);
-
- /* This magic is documented in SMSC app note 7.15 */
- for (i = 16; i > 0; i--)
- outl(0x0008, ioaddr + TEST1);
-
-#ifdef __BIG_ENDIAN
- outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
-#else
- outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
-#endif
- outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
- if (ep->chip_flags & MII_PWRDWN)
- outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
-
- for (i = 0; i < 3; i++)
- outl(le16_to_cpu(((__le16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
-
- ep->tx_threshold = TX_FIFO_THRESH;
- outl(ep->tx_threshold, ioaddr + TxThresh);
- outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
- outl(ep->rx_ring_dma + (ep->cur_rx%RX_RING_SIZE)*
- sizeof(struct epic_rx_desc), ioaddr + PRxCDAR);
- outl(ep->tx_ring_dma + (ep->dirty_tx%TX_RING_SIZE)*
- sizeof(struct epic_tx_desc), ioaddr + PTxCDAR);
-
- /* Start the chip's Rx process. */
- set_rx_mode(dev);
- outl(StartRx | RxQueued, ioaddr + COMMAND);
-
- /* Enable interrupts by setting the interrupt mask. */
- outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
- | CntFull | TxUnderrun
- | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
-
- printk(KERN_DEBUG "%s: epic_restart() done, cmd status %4.4x, ctl %4.4x"
- " interrupt %4.4x.\n",
- dev->name, (int)inl(ioaddr + COMMAND), (int)inl(ioaddr + GENCTL),
- (int)inl(ioaddr + INTSTAT));
-}
-
-static void check_media(struct net_device *dev)
-{
- struct epic_private *ep = netdev_priv(dev);
- long ioaddr = dev->base_addr;
- int mii_lpa = ep->mii_phy_cnt ? mdio_read(dev, ep->phys[0], MII_LPA) : 0;
- int negotiated = mii_lpa & ep->mii.advertising;
- int duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
-
- if (ep->mii.force_media)
- return;
- if (mii_lpa == 0xffff) /* Bogus read */
- return;
- if (ep->mii.full_duplex != duplex) {
- ep->mii.full_duplex = duplex;
- printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d link"
- " partner capability of %4.4x.\n", dev->name,
- ep->mii.full_duplex ? "full" : "half", ep->phys[0], mii_lpa);
- outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
- }
-}
-
-static void epic_timer(unsigned long data)
-{
- struct net_device *dev = (struct net_device *)data;
- struct epic_private *ep = netdev_priv(dev);
- long ioaddr = dev->base_addr;
- int next_tick = 5*HZ;
-
- if (debug > 3) {
- printk(KERN_DEBUG "%s: Media monitor tick, Tx status %8.8x.\n",
- dev->name, (int)inl(ioaddr + TxSTAT));
- printk(KERN_DEBUG "%s: Other registers are IntMask %4.4x "
- "IntStatus %4.4x RxStatus %4.4x.\n",
- dev->name, (int)inl(ioaddr + INTMASK),
- (int)inl(ioaddr + INTSTAT), (int)inl(ioaddr + RxSTAT));
- }
-
- check_media(dev);
-
- ep->timer.expires = jiffies + next_tick;
- add_timer(&ep->timer);
-}
-
-static void epic_tx_timeout(struct net_device *dev)
-{
- struct epic_private *ep = netdev_priv(dev);
- long ioaddr = dev->base_addr;
-
- if (debug > 0) {
- printk(KERN_WARNING "%s: Transmit timeout using MII device, "
- "Tx status %4.4x.\n",
- dev->name, (int)inw(ioaddr + TxSTAT));
- if (debug > 1) {
- printk(KERN_DEBUG "%s: Tx indices: dirty_tx %d, cur_tx %d.\n",
- dev->name, ep->dirty_tx, ep->cur_tx);
- }
- }
- if (inw(ioaddr + TxSTAT) & 0x10) { /* Tx FIFO underflow. */
- dev->stats.tx_fifo_errors++;
- outl(RestartTx, ioaddr + COMMAND);
- } else {
- epic_restart(dev);
- outl(TxQueued, dev->base_addr + COMMAND);
- }
-
- dev->trans_start = jiffies; /* prevent tx timeout */
- dev->stats.tx_errors++;
- if (!ep->tx_full)
- netif_wake_queue(dev);
-}
-
-/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
-static void epic_init_ring(struct net_device *dev)
-{
- struct epic_private *ep = netdev_priv(dev);
- int i;
-
- ep->tx_full = 0;
- ep->dirty_tx = ep->cur_tx = 0;
- ep->cur_rx = ep->dirty_rx = 0;
- ep->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
-
- /* Initialize all Rx descriptors. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- ep->rx_ring[i].rxstatus = 0;
- ep->rx_ring[i].buflength = ep->rx_buf_sz;
- ep->rx_ring[i].next = ep->rx_ring_dma +
- (i+1)*sizeof(struct epic_rx_desc);
- ep->rx_skbuff[i] = NULL;
- }
- /* Mark the last entry as wrapping the ring. */
- ep->rx_ring[i-1].next = ep->rx_ring_dma;
-
- /* Fill in the Rx buffers. Handle allocation failure gracefully. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb = dev_alloc_skb(ep->rx_buf_sz + 2);
- ep->rx_skbuff[i] = skb;
- if (skb == NULL)
- break;
- skb_reserve(skb, 2); /* 16 byte align the IP header. */
- ep->rx_ring[i].bufaddr = pci_map_single(ep->pci_dev,
- skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
- ep->rx_ring[i].rxstatus = DescOwn;
- }
- ep->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
-
- /* The Tx buffer descriptor is filled in as needed, but we
- do need to clear the ownership bit. */
- for (i = 0; i < TX_RING_SIZE; i++) {
- ep->tx_skbuff[i] = NULL;
- ep->tx_ring[i].txstatus = 0x0000;
- ep->tx_ring[i].next = ep->tx_ring_dma +
- (i+1)*sizeof(struct epic_tx_desc);
- }
- ep->tx_ring[i-1].next = ep->tx_ring_dma;
-}
-
-static netdev_tx_t epic_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct epic_private *ep = netdev_priv(dev);
- int entry, free_count;
- u32 ctrl_word;
- unsigned long flags;
-
- if (skb_padto(skb, ETH_ZLEN))
- return NETDEV_TX_OK;
-
- /* Caution: the write order is important here, set the field with the
- "ownership" bit last. */
-
- /* Calculate the next Tx descriptor entry. */
- spin_lock_irqsave(&ep->lock, flags);
- free_count = ep->cur_tx - ep->dirty_tx;
- entry = ep->cur_tx % TX_RING_SIZE;
-
- ep->tx_skbuff[entry] = skb;
- ep->tx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, skb->data,
- skb->len, PCI_DMA_TODEVICE);
- if (free_count < TX_QUEUE_LEN/2) {/* Typical path */
- ctrl_word = 0x100000; /* No interrupt */
- } else if (free_count == TX_QUEUE_LEN/2) {
- ctrl_word = 0x140000; /* Tx-done intr. */
- } else if (free_count < TX_QUEUE_LEN - 1) {
- ctrl_word = 0x100000; /* No Tx-done intr. */
- } else {
- /* Leave room for an additional entry. */
- ctrl_word = 0x140000; /* Tx-done intr. */
- ep->tx_full = 1;
- }
- ep->tx_ring[entry].buflength = ctrl_word | skb->len;
- ep->tx_ring[entry].txstatus =
- ((skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN) << 16)
- | DescOwn;
-
- ep->cur_tx++;
- if (ep->tx_full)
- netif_stop_queue(dev);
-
- spin_unlock_irqrestore(&ep->lock, flags);
- /* Trigger an immediate transmit demand. */
- outl(TxQueued, dev->base_addr + COMMAND);
-
- if (debug > 4)
- printk(KERN_DEBUG "%s: Queued Tx packet size %d to slot %d, "
- "flag %2.2x Tx status %8.8x.\n",
- dev->name, (int)skb->len, entry, ctrl_word,
- (int)inl(dev->base_addr + TxSTAT));
-
- return NETDEV_TX_OK;
-}
-
-static void epic_tx_error(struct net_device *dev, struct epic_private *ep,
- int status)
-{
- struct net_device_stats *stats = &dev->stats;
-
-#ifndef final_version
- /* There was an major error, log it. */
- if (debug > 1)
- printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
- dev->name, status);
-#endif
- stats->tx_errors++;
- if (status & 0x1050)
- stats->tx_aborted_errors++;
- if (status & 0x0008)
- stats->tx_carrier_errors++;
- if (status & 0x0040)
- stats->tx_window_errors++;
- if (status & 0x0010)
- stats->tx_fifo_errors++;
-}
-
-static void epic_tx(struct net_device *dev, struct epic_private *ep)
-{
- unsigned int dirty_tx, cur_tx;
-
- /*
- * Note: if this lock becomes a problem we can narrow the locked
- * region at the cost of occasionally grabbing the lock more times.
- */
- cur_tx = ep->cur_tx;
- for (dirty_tx = ep->dirty_tx; cur_tx - dirty_tx > 0; dirty_tx++) {
- struct sk_buff *skb;
- int entry = dirty_tx % TX_RING_SIZE;
- int txstatus = ep->tx_ring[entry].txstatus;
-
- if (txstatus & DescOwn)
- break; /* It still hasn't been Txed */
-
- if (likely(txstatus & 0x0001)) {
- dev->stats.collisions += (txstatus >> 8) & 15;
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += ep->tx_skbuff[entry]->len;
- } else
- epic_tx_error(dev, ep, txstatus);
-
- /* Free the original skb. */
- skb = ep->tx_skbuff[entry];
- pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr,
- skb->len, PCI_DMA_TODEVICE);
- dev_kfree_skb_irq(skb);
- ep->tx_skbuff[entry] = NULL;
- }
-
-#ifndef final_version
- if (cur_tx - dirty_tx > TX_RING_SIZE) {
- printk(KERN_WARNING
- "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
- dev->name, dirty_tx, cur_tx, ep->tx_full);
- dirty_tx += TX_RING_SIZE;
- }
-#endif
- ep->dirty_tx = dirty_tx;
- if (ep->tx_full && cur_tx - dirty_tx < TX_QUEUE_LEN - 4) {
- /* The ring is no longer full, allow new TX entries. */
- ep->tx_full = 0;
- netif_wake_queue(dev);
- }
-}
-
-/* The interrupt handler does all of the Rx thread work and cleans up
- after the Tx thread. */
-static irqreturn_t epic_interrupt(int irq, void *dev_instance)
-{
- struct net_device *dev = dev_instance;
- struct epic_private *ep = netdev_priv(dev);
- long ioaddr = dev->base_addr;
- unsigned int handled = 0;
- int status;
-
- status = inl(ioaddr + INTSTAT);
- /* Acknowledge all of the current interrupt sources ASAP. */
- outl(status & EpicNormalEvent, ioaddr + INTSTAT);
-
- if (debug > 4) {
- printk(KERN_DEBUG "%s: Interrupt, status=%#8.8x new "
- "intstat=%#8.8x.\n", dev->name, status,
- (int)inl(ioaddr + INTSTAT));
- }
-
- if ((status & IntrSummary) == 0)
- goto out;
-
- handled = 1;
-
- if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) {
- spin_lock(&ep->napi_lock);
- if (napi_schedule_prep(&ep->napi)) {
- epic_napi_irq_off(dev, ep);
- __napi_schedule(&ep->napi);
- } else
- ep->reschedule_in_poll++;
- spin_unlock(&ep->napi_lock);
- }
- status &= ~EpicNapiEvent;
-
- /* Check uncommon events all at once. */
- if (status & (CntFull | TxUnderrun | PCIBusErr170 | PCIBusErr175)) {
- if (status == EpicRemoved)
- goto out;
-
- /* Always update the error counts to avoid overhead later. */
- dev->stats.rx_missed_errors += inb(ioaddr + MPCNT);
- dev->stats.rx_frame_errors += inb(ioaddr + ALICNT);
- dev->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
-
- if (status & TxUnderrun) { /* Tx FIFO underflow. */
- dev->stats.tx_fifo_errors++;
- outl(ep->tx_threshold += 128, ioaddr + TxThresh);
- /* Restart the transmit process. */
- outl(RestartTx, ioaddr + COMMAND);
- }
- if (status & PCIBusErr170) {
- printk(KERN_ERR "%s: PCI Bus Error! status %4.4x.\n",
- dev->name, status);
- epic_pause(dev);
- epic_restart(dev);
- }
- /* Clear all error sources. */
- outl(status & 0x7f18, ioaddr + INTSTAT);
- }
-
-out:
- if (debug > 3) {
- printk(KERN_DEBUG "%s: exit interrupt, intr_status=%#4.4x.\n",
- dev->name, status);
- }
-
- return IRQ_RETVAL(handled);
-}
-
-static int epic_rx(struct net_device *dev, int budget)
-{
- struct epic_private *ep = netdev_priv(dev);
- int entry = ep->cur_rx % RX_RING_SIZE;
- int rx_work_limit = ep->dirty_rx + RX_RING_SIZE - ep->cur_rx;
- int work_done = 0;
-
- if (debug > 4)
- printk(KERN_DEBUG " In epic_rx(), entry %d %8.8x.\n", entry,
- ep->rx_ring[entry].rxstatus);
-
- if (rx_work_limit > budget)
- rx_work_limit = budget;
-
- /* If we own the next entry, it's a new packet. Send it up. */
- while ((ep->rx_ring[entry].rxstatus & DescOwn) == 0) {
- int status = ep->rx_ring[entry].rxstatus;
-
- if (debug > 4)
- printk(KERN_DEBUG " epic_rx() status was %8.8x.\n", status);
- if (--rx_work_limit < 0)
- break;
- if (status & 0x2006) {
- if (debug > 2)
- printk(KERN_DEBUG "%s: epic_rx() error status was %8.8x.\n",
- dev->name, status);
- if (status & 0x2000) {
- printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
- "multiple buffers, status %4.4x!\n", dev->name, status);
- dev->stats.rx_length_errors++;
- } else if (status & 0x0006)
- /* Rx Frame errors are counted in hardware. */
- dev->stats.rx_errors++;
- } else {
- /* Malloc up new buffer, compatible with net-2e. */
- /* Omit the four octet CRC from the length. */
- short pkt_len = (status >> 16) - 4;
- struct sk_buff *skb;
-
- if (pkt_len > PKT_BUF_SZ - 4) {
- printk(KERN_ERR "%s: Oversized Ethernet frame, status %x "
- "%d bytes.\n",
- dev->name, status, pkt_len);
- pkt_len = 1514;
- }
- /* 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_reserve(skb, 2); /* 16 byte align the IP header */
- pci_dma_sync_single_for_cpu(ep->pci_dev,
- ep->rx_ring[entry].bufaddr,
- ep->rx_buf_sz,
- PCI_DMA_FROMDEVICE);
- skb_copy_to_linear_data(skb, ep->rx_skbuff[entry]->data, pkt_len);
- skb_put(skb, pkt_len);
- pci_dma_sync_single_for_device(ep->pci_dev,
- ep->rx_ring[entry].bufaddr,
- ep->rx_buf_sz,
- PCI_DMA_FROMDEVICE);
- } else {
- pci_unmap_single(ep->pci_dev,
- ep->rx_ring[entry].bufaddr,
- ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
- skb_put(skb = ep->rx_skbuff[entry], pkt_len);
- ep->rx_skbuff[entry] = NULL;
- }
- skb->protocol = eth_type_trans(skb, dev);
- netif_receive_skb(skb);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pkt_len;
- }
- work_done++;
- entry = (++ep->cur_rx) % RX_RING_SIZE;
- }
-
- /* Refill the Rx ring buffers. */
- for (; ep->cur_rx - ep->dirty_rx > 0; ep->dirty_rx++) {
- entry = ep->dirty_rx % RX_RING_SIZE;
- if (ep->rx_skbuff[entry] == NULL) {
- struct sk_buff *skb;
- skb = ep->rx_skbuff[entry] = dev_alloc_skb(ep->rx_buf_sz + 2);
- if (skb == NULL)
- break;
- skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
- ep->rx_ring[entry].bufaddr = pci_map_single(ep->pci_dev,
- skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
- work_done++;
- }
- /* AV: shouldn't we add a barrier here? */
- ep->rx_ring[entry].rxstatus = DescOwn;
- }
- return work_done;
-}
-
-static void epic_rx_err(struct net_device *dev, struct epic_private *ep)
-{
- long ioaddr = dev->base_addr;
- int status;
-
- status = inl(ioaddr + INTSTAT);
-
- if (status == EpicRemoved)
- return;
- if (status & RxOverflow) /* Missed a Rx frame. */
- dev->stats.rx_errors++;
- if (status & (RxOverflow | RxFull))
- outw(RxQueued, ioaddr + COMMAND);
-}
-
-static int epic_poll(struct napi_struct *napi, int budget)
-{
- struct epic_private *ep = container_of(napi, struct epic_private, napi);
- struct net_device *dev = ep->mii.dev;
- int work_done = 0;
- long ioaddr = dev->base_addr;
-
-rx_action:
-
- epic_tx(dev, ep);
-
- work_done += epic_rx(dev, budget);
-
- epic_rx_err(dev, ep);
-
- if (work_done < budget) {
- unsigned long flags;
- int more;
-
- /* A bit baroque but it avoids a (space hungry) spin_unlock */
-
- spin_lock_irqsave(&ep->napi_lock, flags);
-
- more = ep->reschedule_in_poll;
- if (!more) {
- __napi_complete(napi);
- outl(EpicNapiEvent, ioaddr + INTSTAT);
- epic_napi_irq_on(dev, ep);
- } else
- ep->reschedule_in_poll--;
-
- spin_unlock_irqrestore(&ep->napi_lock, flags);
-
- if (more)
- goto rx_action;
- }
-
- return work_done;
-}
-
-static int epic_close(struct net_device *dev)
-{
- long ioaddr = dev->base_addr;
- struct epic_private *ep = netdev_priv(dev);
- struct sk_buff *skb;
- int i;
-
- netif_stop_queue(dev);
- napi_disable(&ep->napi);
-
- if (debug > 1)
- printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
- dev->name, (int)inl(ioaddr + INTSTAT));
-
- del_timer_sync(&ep->timer);
-
- epic_disable_int(dev, ep);
-
- free_irq(dev->irq, dev);
-
- epic_pause(dev);
-
- /* Free all the skbuffs in the Rx queue. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- skb = ep->rx_skbuff[i];
- ep->rx_skbuff[i] = NULL;
- ep->rx_ring[i].rxstatus = 0; /* Not owned by Epic chip. */
- ep->rx_ring[i].buflength = 0;
- if (skb) {
- pci_unmap_single(ep->pci_dev, ep->rx_ring[i].bufaddr,
- ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
- dev_kfree_skb(skb);
- }
- ep->rx_ring[i].bufaddr = 0xBADF00D0; /* An invalid address. */
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- skb = ep->tx_skbuff[i];
- ep->tx_skbuff[i] = NULL;
- if (!skb)
- continue;
- pci_unmap_single(ep->pci_dev, ep->tx_ring[i].bufaddr,
- skb->len, PCI_DMA_TODEVICE);
- dev_kfree_skb(skb);
- }
-
- /* Green! Leave the chip in low-power mode. */
- outl(0x0008, ioaddr + GENCTL);
-
- return 0;
-}
-
-static struct net_device_stats *epic_get_stats(struct net_device *dev)
-{
- long ioaddr = dev->base_addr;
-
- if (netif_running(dev)) {
- /* Update the error counts. */
- dev->stats.rx_missed_errors += inb(ioaddr + MPCNT);
- dev->stats.rx_frame_errors += inb(ioaddr + ALICNT);
- dev->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
- }
-
- return &dev->stats;
-}
-
-/* Set or clear the multicast filter for this adaptor.
- Note that we only use exclusion around actually queueing the
- new frame, not around filling ep->setup_frame. This is non-deterministic
- when re-entered but still correct. */
-
-static void set_rx_mode(struct net_device *dev)
-{
- long ioaddr = dev->base_addr;
- struct epic_private *ep = netdev_priv(dev);
- unsigned char mc_filter[8]; /* Multicast hash filter */
- int i;
-
- if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
- outl(0x002C, ioaddr + RxCtrl);
- /* Unconditionally log net taps. */
- memset(mc_filter, 0xff, sizeof(mc_filter));
- } else if ((!netdev_mc_empty(dev)) || (dev->flags & IFF_ALLMULTI)) {
- /* There is apparently a chip bug, so the multicast filter
- is never enabled. */
- /* Too many to filter perfectly -- accept all multicasts. */
- memset(mc_filter, 0xff, sizeof(mc_filter));
- outl(0x000C, ioaddr + RxCtrl);
- } else if (netdev_mc_empty(dev)) {
- outl(0x0004, ioaddr + RxCtrl);
- return;
- } else { /* Never executed, for now. */
- struct netdev_hw_addr *ha;
-
- memset(mc_filter, 0, sizeof(mc_filter));
- netdev_for_each_mc_addr(ha, dev) {
- unsigned int bit_nr =
- ether_crc_le(ETH_ALEN, ha->addr) & 0x3f;
- mc_filter[bit_nr >> 3] |= (1 << bit_nr);
- }
- }
- /* ToDo: perhaps we need to stop the Tx and Rx process here? */
- if (memcmp(mc_filter, ep->mc_filter, sizeof(mc_filter))) {
- for (i = 0; i < 4; i++)
- outw(((u16 *)mc_filter)[i], ioaddr + MC0 + i*4);
- memcpy(ep->mc_filter, mc_filter, sizeof(mc_filter));
- }
-}
-
-static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
-{
- struct epic_private *np = netdev_priv(dev);
-
- strcpy (info->driver, DRV_NAME);
- strcpy (info->version, DRV_VERSION);
- strcpy (info->bus_info, pci_name(np->pci_dev));
-}
-
-static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
- struct epic_private *np = netdev_priv(dev);
- int rc;
-
- spin_lock_irq(&np->lock);
- rc = mii_ethtool_gset(&np->mii, cmd);
- spin_unlock_irq(&np->lock);
-
- return rc;
-}
-
-static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
- struct epic_private *np = netdev_priv(dev);
- int rc;
-
- spin_lock_irq(&np->lock);
- rc = mii_ethtool_sset(&np->mii, cmd);
- spin_unlock_irq(&np->lock);
-
- return rc;
-}
-
-static int netdev_nway_reset(struct net_device *dev)
-{
- struct epic_private *np = netdev_priv(dev);
- return mii_nway_restart(&np->mii);
-}
-
-static u32 netdev_get_link(struct net_device *dev)
-{
- struct epic_private *np = netdev_priv(dev);
- return mii_link_ok(&np->mii);
-}
-
-static u32 netdev_get_msglevel(struct net_device *dev)
-{
- return debug;
-}
-
-static void netdev_set_msglevel(struct net_device *dev, u32 value)
-{
- debug = value;
-}
-
-static int ethtool_begin(struct net_device *dev)
-{
- unsigned long ioaddr = dev->base_addr;
- /* power-up, if interface is down */
- if (! netif_running(dev)) {
- outl(0x0200, ioaddr + GENCTL);
- outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
- }
- return 0;
-}
-
-static void ethtool_complete(struct net_device *dev)
-{
- unsigned long ioaddr = dev->base_addr;
- /* power-down, if interface is down */
- if (! netif_running(dev)) {
- outl(0x0008, ioaddr + GENCTL);
- outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL);
- }
-}
-
-static const struct ethtool_ops netdev_ethtool_ops = {
- .get_drvinfo = netdev_get_drvinfo,
- .get_settings = netdev_get_settings,
- .set_settings = netdev_set_settings,
- .nway_reset = netdev_nway_reset,
- .get_link = netdev_get_link,
- .get_msglevel = netdev_get_msglevel,
- .set_msglevel = netdev_set_msglevel,
- .begin = ethtool_begin,
- .complete = ethtool_complete
-};
-
-static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
- struct epic_private *np = netdev_priv(dev);
- long ioaddr = dev->base_addr;
- struct mii_ioctl_data *data = if_mii(rq);
- int rc;
-
- /* power-up, if interface is down */
- if (! netif_running(dev)) {
- outl(0x0200, ioaddr + GENCTL);
- outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
- }
-
- /* all non-ethtool ioctls (the SIOC[GS]MIIxxx ioctls) */
- spin_lock_irq(&np->lock);
- rc = generic_mii_ioctl(&np->mii, data, cmd, NULL);
- spin_unlock_irq(&np->lock);
-
- /* power-down, if interface is down */
- if (! netif_running(dev)) {
- outl(0x0008, ioaddr + GENCTL);
- outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL);
- }
- return rc;
-}
-
-
-static void __devexit epic_remove_one (struct pci_dev *pdev)
-{
- struct net_device *dev = pci_get_drvdata(pdev);
- struct epic_private *ep = netdev_priv(dev);
-
- pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
- pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
- unregister_netdev(dev);
-#ifndef USE_IO_OPS
- iounmap((void*) dev->base_addr);
-#endif
- pci_release_regions(pdev);
- free_netdev(dev);
- pci_disable_device(pdev);
- pci_set_drvdata(pdev, NULL);
- /* pci_power_off(pdev, -1); */
-}
-
-
-#ifdef CONFIG_PM
-
-static int epic_suspend (struct pci_dev *pdev, pm_message_t state)
-{
- struct net_device *dev = pci_get_drvdata(pdev);
- long ioaddr = dev->base_addr;
-
- if (!netif_running(dev))
- return 0;
- epic_pause(dev);
- /* Put the chip into low-power mode. */
- outl(0x0008, ioaddr + GENCTL);
- /* pci_power_off(pdev, -1); */
- return 0;
-}
-
-
-static int epic_resume (struct pci_dev *pdev)
-{
- struct net_device *dev = pci_get_drvdata(pdev);
-
- if (!netif_running(dev))
- return 0;
- epic_restart(dev);
- /* pci_power_on(pdev); */
- return 0;
-}
-
-#endif /* CONFIG_PM */
-
-
-static struct pci_driver epic_driver = {
- .name = DRV_NAME,
- .id_table = epic_pci_tbl,
- .probe = epic_init_one,
- .remove = __devexit_p(epic_remove_one),
-#ifdef CONFIG_PM
- .suspend = epic_suspend,
- .resume = epic_resume,
-#endif /* CONFIG_PM */
-};
-
-
-static int __init epic_init (void)
-{
-/* when a module, this is printed whether or not devices are found in probe */
-#ifdef MODULE
- printk (KERN_INFO "%s%s",
- version, version2);
-#endif
-
- return pci_register_driver(&epic_driver);
-}
-
-
-static void __exit epic_cleanup (void)
-{
- pci_unregister_driver (&epic_driver);
-}
-
-
-module_init(epic_init);
-module_exit(epic_cleanup);
git.openpandora.org / pandora-kernel.git / blobdiff