velocity.c File Reference

VIA Velocity network driver. More...

#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <byteswap.h>
#include <ipxe/netdevice.h>
#include <ipxe/ethernet.h>
#include <ipxe/if_ether.h>
#include <ipxe/iobuf.h>
#include <ipxe/malloc.h>
#include <ipxe/pci.h>
#include <ipxe/mii.h>
#include "velocity.h"

Go to the source code of this file.

Macros
#define	velocity_setbit(_reg, _mask)   writeb ( readb ( _reg ) | _mask, _reg )
#define	virt_to_le32bus(x)   ( cpu_to_le32 ( virt_to_bus ( x ) ) )

Functions
	FILE_LICENCE (GPL2_OR_LATER)
static int	velocity_autopoll_stop (struct velocity_nic *vlc)
	Stop MII auto-polling. More...
static int	velocity_autopoll_start (struct velocity_nic *vlc)
	Start MII auto-polling. More...
static int	velocity_mii_read (struct mii_interface *mdio, unsigned int phy __unused, unsigned int reg)
	Read from MII register. More...
static int	velocity_mii_write (struct mii_interface *mdio, unsigned int phy __unused, unsigned int reg, unsigned int data)
	Write to MII register. More...
static void	velocity_set_link (struct velocity_nic *vlc)
	Set Link speed. More...
static int	velocity_reload_eeprom (struct velocity_nic *vlc)
	Reload eeprom contents. More...
static int	velocity_reset (struct velocity_nic *vlc)
	Reset hardware. More...
static void	velocity_check_link (struct net_device *netdev)
	Check link state. More...
static int	velocity_alloc_rings (struct velocity_nic *vlc)
	Allocate descriptor rings. More...
static void	velocity_refill_rx (struct velocity_nic *vlc)
	Refill receive descriptor ring. More...
static int	velocity_open (struct net_device *netdev)
	Open network device. More...
static void	velocity_close (struct net_device *netdev)
	Close network device. More...
static int	velocity_transmit (struct net_device *netdev, struct io_buffer *iobuf)
	Transmit packet. More...
static void	velocity_poll_rx (struct velocity_nic *vlc)
	Poll for received packets. More...
static void	velocity_poll_tx (struct velocity_nic *vlc)
	Poll for completed packets. More...
static void	velocity_poll (struct net_device *netdev)
	Poll for completed and received packets. More...
static void	velocity_irq (struct net_device *netdev, int enable)
	Enable or disable interrupts. More...
static int	velocity_probe (struct pci_device *pci)
	Probe PCI device. More...
static void	velocity_remove (struct pci_device *pci)
	Remove PCI device. More...

Variables
static struct mii_operations	velocity_mii_operations
	Velocity MII operations. More...
static struct net_device_operations	velocity_operations
	Velocity network device operations. More...
static struct pci_device_id	velocity_nics []
	Velocity PCI device IDs. More...
struct pci_driver velocity_driver	__pci_driver
	Velocity PCI driver. More...

Detailed Description

VIA Velocity network driver.

Definition in file velocity.c.

Macro Definition Documentation

velocity_setbit

#define velocity_setbit	(		_reg,
			_mask
	)		writeb ( readb ( _reg ) | _mask, _reg )

Definition at line 36 of file velocity.c.

virt_to_le32bus

#define virt_to_le32bus

(

x

)

( cpu_to_le32 ( virt_to_bus ( x ) ) )

Definition at line 37 of file velocity.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER

)

velocity_autopoll_stop()

static int velocity_autopoll_stop ( struct velocity_nic *  vlc )

static

Stop MII auto-polling.

Parameters

vlc	Velocity device

Return values

rc	Return status code

Definition at line 58 of file velocity.c.

                                                               {
        int timeout = VELOCITY_TIMEOUT_US;

        /* Disable MII auto polling */
        writeb ( 0, vlc->regs + VELOCITY_MIICR );

        /* Wait for disabling to take effect */
        while ( timeout-- ) {
                udelay ( 1 );
                if ( readb ( vlc->regs + VELOCITY_MIISR ) &
                             VELOCITY_MIISR_IDLE )
                        return 0;
        }

        DBGC ( vlc, "MII autopoll stop timeout\n" );
        return -ETIMEDOUT;
}

References DBGC, ETIMEDOUT, readb(), velocity_nic::regs, timeout(), udelay(), VELOCITY_MIICR, VELOCITY_MIISR, VELOCITY_MIISR_IDLE, VELOCITY_TIMEOUT_US, and writeb().

Referenced by velocity_mii_read(), and velocity_mii_write().

velocity_autopoll_start()

static int velocity_autopoll_start ( struct velocity_nic *  vlc )

static

Start MII auto-polling.

Parameters

vlc	Velocity device

Return values

rc	Return status code

Definition at line 82 of file velocity.c.

                                                                {
        int timeout = VELOCITY_TIMEOUT_US;

        /* Enable MII auto polling */
        writeb ( VELOCITY_MIICR_MAUTO, vlc->regs + VELOCITY_MIICR );

        /* Wait for enabling to take effect */
        while ( timeout-- ) {
                udelay ( 1 );
                if ( ( readb ( vlc->regs + VELOCITY_MIISR ) &
                       VELOCITY_MIISR_IDLE ) == 0 )
                        return 0;
        }

        DBGC ( vlc, "MII autopoll start timeout\n" );
        return -ETIMEDOUT;
}

References DBGC, ETIMEDOUT, readb(), velocity_nic::regs, timeout(), udelay(), VELOCITY_MIICR, VELOCITY_MIICR_MAUTO, VELOCITY_MIISR, VELOCITY_MIISR_IDLE, VELOCITY_TIMEOUT_US, and writeb().

Referenced by velocity_check_link(), velocity_mii_read(), velocity_mii_write(), and velocity_open().

velocity_mii_read()

static int velocity_mii_read ( struct mii_interface *  mdio, unsigned int phy  __unused, unsigned int  reg  )

static

Read from MII register.

Parameters

mdio	MII interface
phy	PHY address
reg	Register address

Return values

value

Data read, or negative error

Definition at line 108 of file velocity.c.

                                                                             {
        struct velocity_nic *vlc =
                container_of ( mdio, struct velocity_nic, mdio );
        int timeout = VELOCITY_TIMEOUT_US;
        int result;

        DBGC2 ( vlc, "VELOCITY %p MII read reg %d\n", vlc, reg );

        /* Disable autopolling before we can access MII */
        velocity_autopoll_stop ( vlc );

        /* Send read command and address */
        writeb ( reg, vlc->regs + VELOCITY_MIIADDR );
        velocity_setbit ( vlc->regs + VELOCITY_MIICR, VELOCITY_MIICR_RCMD );

        /* Wait for read to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                if ( ( readb ( vlc->regs + VELOCITY_MIICR ) &
                       VELOCITY_MIICR_RCMD ) == 0 ) {
                        result = readw ( vlc->regs + VELOCITY_MIIDATA );
                        velocity_autopoll_start ( vlc );
                        return result;
                }
        }

        /* Restart autopolling */
        velocity_autopoll_start ( vlc );

        DBGC ( vlc, "MII read timeout\n" );
        return -ETIMEDOUT;
}

References container_of, DBGC, DBGC2, ETIMEDOUT, velocity_nic::mdio, readb(), readw(), reg, velocity_nic::regs, result, timeout(), udelay(), velocity_autopoll_start(), velocity_autopoll_stop(), VELOCITY_MIIADDR, VELOCITY_MIICR, VELOCITY_MIICR_RCMD, VELOCITY_MIIDATA, velocity_setbit, VELOCITY_TIMEOUT_US, and writeb().

velocity_mii_write()

static int velocity_mii_write ( struct mii_interface *  mdio, unsigned int phy  __unused, unsigned int  reg, unsigned int  data  )

static

Write to MII register.

Parameters

mdio	MII interface
phy	PHY address
reg	Register address
data	Data to write

Return values

rc	Return status code

Definition at line 151 of file velocity.c.

                                                   {
        struct velocity_nic *vlc =
                container_of ( mdio, struct velocity_nic, mdio );
        int timeout = VELOCITY_TIMEOUT_US;

        DBGC2 ( vlc, "VELOCITY %p MII write reg %d data 0x%04x\n",
                        vlc, reg, data );

        /* Disable autopolling before we can access MII */
        velocity_autopoll_stop ( vlc );

        /* Send write command, data and destination register */
        writeb ( reg, vlc->regs + VELOCITY_MIIADDR );
        writew ( data, vlc->regs + VELOCITY_MIIDATA );
        velocity_setbit ( vlc->regs + VELOCITY_MIICR, VELOCITY_MIICR_WCMD );

        /* Wait for write to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                if ( ( readb ( vlc->regs + VELOCITY_MIICR ) &
                       VELOCITY_MIICR_WCMD ) == 0 ) {
                        velocity_autopoll_start ( vlc );
                        return 0;
                }
        }

        /* Restart autopolling */
        velocity_autopoll_start ( vlc );

        DBGC ( vlc, "MII write timeout\n" );
        return -ETIMEDOUT;
}

References container_of, data, DBGC, DBGC2, ETIMEDOUT, velocity_nic::mdio, readb(), reg, velocity_nic::regs, timeout(), udelay(), velocity_autopoll_start(), velocity_autopoll_stop(), VELOCITY_MIIADDR, VELOCITY_MIICR, VELOCITY_MIICR_WCMD, VELOCITY_MIIDATA, velocity_setbit, VELOCITY_TIMEOUT_US, writeb(), and writew.

velocity_set_link()

static void velocity_set_link ( struct velocity_nic *  vlc )

static

Set Link speed.

Parameters

vlc	Velocity device

Definition at line 197 of file velocity.c.

                                                           {
        int tmp;

        /* Advertise 1000MBit */
        tmp = mii_read ( &vlc->mii, MII_CTRL1000 );
        tmp |= ADVERTISE_1000FULL | ADVERTISE_1000HALF;
        mii_write ( &vlc->mii, MII_CTRL1000, tmp );

        /* Enable GBit operation in MII Control Register */
        tmp = mii_read ( &vlc->mii, MII_BMCR );
        tmp |= BMCR_SPEED1000;
        mii_write ( &vlc->mii, MII_BMCR, tmp );
}

References ADVERTISE_1000FULL, ADVERTISE_1000HALF, BMCR_SPEED1000, velocity_nic::mii, MII_BMCR, MII_CTRL1000, mii_read(), mii_write(), and tmp.

Referenced by velocity_probe().

velocity_reload_eeprom()

static int velocity_reload_eeprom ( struct velocity_nic *  vlc )

static

Reload eeprom contents.

Parameters

vlc	Velocity device

Definition at line 223 of file velocity.c.

                                                               {
        int timeout = VELOCITY_TIMEOUT_US;

        /* Initiate reload */
        velocity_setbit ( vlc->regs + VELOCITY_EECSR, VELOCITY_EECSR_RELOAD );

        /* Wait for reload to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                if ( ( readb ( vlc->regs + VELOCITY_EECSR ) &
                       VELOCITY_EECSR_RELOAD ) == 0 )
                        return 0;
        }

        DBGC ( vlc, "VELOCITY %p EEPROM reload timeout\n", vlc );
        return -ETIMEDOUT;
}

References DBGC, ETIMEDOUT, readb(), velocity_nic::regs, timeout(), udelay(), VELOCITY_EECSR, VELOCITY_EECSR_RELOAD, velocity_setbit, and VELOCITY_TIMEOUT_US.

Referenced by velocity_probe().

velocity_reset()

static int velocity_reset ( struct velocity_nic *  vlc )

static

Reset hardware.

Parameters

vlc	Velocity device

Return values

rc	Return status code

Definition at line 247 of file velocity.c.

                                                       {
        int timeout = VELOCITY_TIMEOUT_US;
        uint8_t tmp;

        DBGC ( vlc, "VELOCITY %p reset\n", vlc );

        /* clear sticky Power state bits */
        tmp = readb ( vlc->regs + VELOCITY_STICKY );
        tmp &= ~( VELOCITY_STICKY_DS0 | VELOCITY_STICKY_DS1 );
        writeb ( tmp, vlc->regs + VELOCITY_STICKY );

        /* clear PACPI, which might have been enabled by the EEPROM reload */
        tmp = readb ( vlc->regs + VELOCITY_CFGA );
        tmp &= ~VELOCITY_CFGA_PACPI;
        writeb ( tmp, vlc->regs + VELOCITY_CFGA );

        velocity_setbit ( vlc->regs + VELOCITY_CRS1, VELOCITY_CR1_SFRST );

        /* Wait for reset to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                if ( ( readb ( vlc->regs + VELOCITY_CRS1 ) &
                       VELOCITY_CR1_SFRST ) == 0 )
                        return 0;
        }

        return -EINVAL;
}

References DBGC, EINVAL, readb(), velocity_nic::regs, timeout(), tmp, udelay(), VELOCITY_CFGA, VELOCITY_CFGA_PACPI, VELOCITY_CR1_SFRST, VELOCITY_CRS1, velocity_setbit, VELOCITY_STICKY, VELOCITY_STICKY_DS0, VELOCITY_STICKY_DS1, VELOCITY_TIMEOUT_US, and writeb().

Referenced by velocity_probe(), and velocity_remove().

velocity_check_link()

static void velocity_check_link ( struct net_device *  netdev )

static

Check link state.

Parameters

netdev

Network device

Definition at line 288 of file velocity.c.

                                                              {
        struct velocity_nic *vlc = netdev->priv;

        if ( readb ( vlc->regs + VELOCITY_PHYSTS0 ) & VELOCITY_PHYSTS0_LINK ) {
                netdev_link_up ( netdev );
                DBGC ( vlc, "VELOCITY %p link up\n", vlc );
        } else {
                netdev_link_down ( netdev );
                DBGC ( vlc, "VELOCITY %p link down\n", vlc );
        }

        /* The card disables auto-poll after a link change */
        velocity_autopoll_start ( vlc );
}

References DBGC, netdev, netdev_link_down(), netdev_link_up(), net_device::priv, readb(), velocity_nic::regs, velocity_autopoll_start(), VELOCITY_PHYSTS0, and VELOCITY_PHYSTS0_LINK.

Referenced by velocity_open(), and velocity_poll().

velocity_alloc_rings()

static int velocity_alloc_rings ( struct velocity_nic *  vlc )

static

Allocate descriptor rings.

Parameters

vlc	Velocity device

Return values

rc	Return status code

Definition at line 316 of file velocity.c.

                                                             {
        int rc = 0;

        /* Allocate RX descriptor ring */
        vlc->rx_prod = 0;
        vlc->rx_cons = 0;
        vlc->rx_commit = 0;
        vlc->rx_ring = malloc_phys ( VELOCITY_RXDESC_SIZE,
                                     VELOCITY_RING_ALIGN );
        if ( ! vlc->rx_ring )
                return -ENOMEM;

        memset ( vlc->rx_ring, 0, VELOCITY_RXDESC_SIZE );

        DBGC2 ( vlc, "VELOCITY %p RX ring start address: %p(phys: %#08lx)\n",
               vlc, vlc->rx_ring, virt_to_bus ( vlc->rx_ring ) );

        /* Allocate TX descriptor ring */
        vlc->tx_prod = 0;
        vlc->tx_cons = 0;
        vlc->tx_ring = malloc_phys ( VELOCITY_TXDESC_SIZE,
                                     VELOCITY_RING_ALIGN );
        if ( ! vlc->tx_ring ) {
                rc = -ENOMEM;
                goto err_tx_alloc;
        }

        memset ( vlc->tx_ring, 0, VELOCITY_TXDESC_SIZE );

        /* Send RX ring to the card */
        writel ( virt_to_bus ( vlc->rx_ring ),
                 vlc->regs + VELOCITY_RXDESC_ADDR_LO );
        writew ( VELOCITY_RXDESC_NUM - 1, vlc->regs + VELOCITY_RXDESCNUM );

        /* Send TX ring to the card */
        writel ( virt_to_bus ( vlc->tx_ring ),
                 vlc->regs + VELOCITY_TXDESC_ADDR_LO0 );
        writew ( VELOCITY_TXDESC_NUM - 1, vlc->regs + VELOCITY_TXDESCNUM );

        DBGC2 ( vlc, "VELOCITY %p TX ring start address: %p(phys: %#08lx)\n",
               vlc, vlc->tx_ring, virt_to_bus ( vlc->tx_ring ) );

        return 0;

err_tx_alloc:
        free_phys ( vlc->rx_ring, VELOCITY_RXDESC_SIZE );
        return rc;
}

References DBGC2, ENOMEM, free_phys(), malloc_phys(), memset(), rc, velocity_nic::regs, velocity_nic::rx_commit, velocity_nic::rx_cons, velocity_nic::rx_prod, velocity_nic::rx_ring, velocity_nic::tx_cons, velocity_nic::tx_prod, velocity_nic::tx_ring, VELOCITY_RING_ALIGN, VELOCITY_RXDESC_ADDR_LO, VELOCITY_RXDESC_NUM, VELOCITY_RXDESC_SIZE, VELOCITY_RXDESCNUM, VELOCITY_TXDESC_ADDR_LO0, VELOCITY_TXDESC_NUM, VELOCITY_TXDESC_SIZE, VELOCITY_TXDESCNUM, virt_to_bus(), writel(), and writew.

Referenced by velocity_open().

velocity_refill_rx()

static void velocity_refill_rx ( struct velocity_nic *  vlc )

static

Refill receive descriptor ring.

Parameters

vlc	Velocity device

Definition at line 370 of file velocity.c.

                                                            {
        struct velocity_rx_descriptor *desc;
        struct io_buffer *iobuf;
        int rx_idx, i = 0;

        /* Check for new packets */
        while ( ( vlc->rx_prod - vlc->rx_cons ) < VELOCITY_RXDESC_NUM ) {
                iobuf = alloc_iob ( VELOCITY_RX_MAX_LEN );

                /* Memory pressure: try again next poll */
                if ( ! iobuf )
                        break;

                rx_idx = ( vlc->rx_prod++ % VELOCITY_RXDESC_NUM );
                desc = &vlc->rx_ring[rx_idx];

                /* Set descrptor fields */
                desc->des1 = 0;
                desc->addr = virt_to_le32bus ( iobuf-> data );
                desc->des2 = cpu_to_le32 (
                    VELOCITY_DES2_SIZE ( VELOCITY_RX_MAX_LEN - 1 ) |
                    VELOCITY_DES2_IC );

                vlc->rx_buffs[rx_idx] = iobuf;
                i++;

                /* Return RX descriptors in blocks of 4 (hw requirement) */
                if ( rx_idx % 4 == 3 ) {
                        int j;
                        for (j = 0; j < 4; j++) {
                                desc = &vlc->rx_ring[rx_idx - j];
                                desc->des0 = cpu_to_le32 ( VELOCITY_DES0_OWN );
                        }
                        vlc->rx_commit += 4;
                }
        }

        wmb();

        if ( vlc->rx_commit ) {
                writew ( vlc->rx_commit,
                         vlc->regs + VELOCITY_RXDESC_RESIDUECNT );
                vlc->rx_commit = 0;
        }

        if ( i > 0 )
                DBGC2 ( vlc, "VELOCITY %p refilled %d RX descriptors\n",
                        vlc, i );
}

References alloc_iob(), cpu_to_le32, data, DBGC2, desc, velocity_nic::regs, velocity_nic::rx_buffs, velocity_nic::rx_commit, velocity_nic::rx_cons, velocity_nic::rx_prod, velocity_nic::rx_ring, VELOCITY_DES0_OWN, VELOCITY_DES2_IC, VELOCITY_DES2_SIZE, VELOCITY_RX_MAX_LEN, VELOCITY_RXDESC_NUM, VELOCITY_RXDESC_RESIDUECNT, virt_to_le32bus, wmb(), and writew.

Referenced by velocity_open(), and velocity_poll().

velocity_open()

static int velocity_open ( struct net_device *  netdev )

static

Open network device.

Parameters

netdev

Network device

Return values

rc	Return status code

Definition at line 426 of file velocity.c.

                                                       {
        struct velocity_nic *vlc = netdev->priv;
        int rc;

        DBGC ( vlc, "VELOCITY %p open\n", vlc );
        DBGC ( vlc, "VELOCITY %p regs at: %p\n", vlc, vlc->regs );

        /* Allocate descriptor rings */
        if ( ( rc = velocity_alloc_rings ( vlc ) ) != 0 )
                return rc;

        velocity_refill_rx ( vlc );

        /* Enable TX/RX queue */
        writew ( VELOCITY_TXQCSRS_RUN0, vlc->regs + VELOCITY_TXQCSRS );
        writew ( VELOCITY_RXQCSR_RUN | VELOCITY_RXQCSR_WAK,
                 vlc->regs + VELOCITY_RXQCSRS );

        /* Enable interrupts */
        writeb ( 0xff, vlc->regs + VELOCITY_IMR0 );
        writeb ( 0xff, vlc->regs + VELOCITY_IMR1 );

        /* Start MAC */
        writeb ( VELOCITY_CR0_STOP, vlc->regs + VELOCITY_CRC0 );
        writeb ( VELOCITY_CR1_DPOLL, vlc->regs + VELOCITY_CRC0 );
        writeb ( VELOCITY_CR0_START | VELOCITY_CR0_TXON | VELOCITY_CR0_RXON,
                 vlc->regs + VELOCITY_CRS0 );

        /* Receive all packets */
        writeb ( 0xff, vlc->regs + VELOCITY_RCR );

        /* Set initial link state */
        velocity_check_link ( netdev );

        velocity_autopoll_start ( vlc );

        DBGC2 ( vlc, "VELOCITY %p CR3 %02x\n",
                vlc, readb ( vlc->regs + 0x0B ) );

        return 0;
}

References DBGC, DBGC2, netdev, net_device::priv, rc, readb(), velocity_nic::regs, velocity_alloc_rings(), velocity_autopoll_start(), velocity_check_link(), VELOCITY_CR0_RXON, VELOCITY_CR0_START, VELOCITY_CR0_STOP, VELOCITY_CR0_TXON, VELOCITY_CR1_DPOLL, VELOCITY_CRC0, VELOCITY_CRS0, VELOCITY_IMR0, VELOCITY_IMR1, VELOCITY_RCR, velocity_refill_rx(), VELOCITY_RXQCSR_RUN, VELOCITY_RXQCSR_WAK, VELOCITY_RXQCSRS, VELOCITY_TXQCSRS, VELOCITY_TXQCSRS_RUN0, writeb(), and writew.

velocity_close()

static void velocity_close ( struct net_device *  netdev )

static

Close network device.

Parameters

netdev

Network device

Definition at line 473 of file velocity.c.

                                                         {
        struct velocity_nic *vlc = netdev->priv;
        int i;

        /* Stop NIC */
        writeb ( VELOCITY_CR0_TXON | VELOCITY_CR0_RXON,
                 vlc->regs + VELOCITY_CRC0 );
        writeb ( VELOCITY_CR0_STOP, vlc->regs + VELOCITY_CRS0 );

        /* Clear RX ring information */
        writel ( 0, vlc->regs + VELOCITY_RXDESC_ADDR_LO );
        writew ( 0, vlc->regs + VELOCITY_RXDESCNUM );

        /* Destroy RX ring */
        free_phys ( vlc->rx_ring, VELOCITY_RXDESC_SIZE );
        vlc->rx_ring = NULL;
        vlc->rx_prod = 0;
        vlc->rx_cons = 0;

        /* Discard receive buffers */
        for ( i = 0 ; i < VELOCITY_RXDESC_NUM ; i++ ) {
                if ( vlc->rx_buffs[i] )
                        free_iob ( vlc->rx_buffs[i] );
                vlc->rx_buffs[i] = NULL;
        }

        /* Clear TX ring information */
        writel ( 0, vlc->regs + VELOCITY_TXDESC_ADDR_LO0 );
        writew ( 0, vlc->regs + VELOCITY_TXDESCNUM );

        /* Destroy TX ring */
        free_phys ( vlc->tx_ring, VELOCITY_TXDESC_SIZE );
        vlc->tx_ring = NULL;
        vlc->tx_prod = 0;
        vlc->tx_cons = 0;
}

References free_iob(), free_phys(), netdev, NULL, net_device::priv, velocity_nic::regs, velocity_nic::rx_buffs, velocity_nic::rx_cons, velocity_nic::rx_prod, velocity_nic::rx_ring, velocity_nic::tx_cons, velocity_nic::tx_prod, velocity_nic::tx_ring, VELOCITY_CR0_RXON, VELOCITY_CR0_STOP, VELOCITY_CR0_TXON, VELOCITY_CRC0, VELOCITY_CRS0, VELOCITY_RXDESC_ADDR_LO, VELOCITY_RXDESC_NUM, VELOCITY_RXDESC_SIZE, VELOCITY_RXDESCNUM, VELOCITY_TXDESC_ADDR_LO0, VELOCITY_TXDESC_SIZE, VELOCITY_TXDESCNUM, writeb(), writel(), and writew.

velocity_transmit()

static int velocity_transmit ( struct net_device *  netdev, struct io_buffer *  iobuf  )

static

Transmit packet.

Parameters

netdev	Network device
iobuf	I/O buffer

Return values

rc	Return status code

Definition at line 517 of file velocity.c.

                                                         {
        struct velocity_nic *vlc = netdev->priv;
        struct velocity_tx_descriptor *desc;
        unsigned int tx_idx;

        /* Pad packet to minimum length */
        iob_pad ( iobuf, ETH_ZLEN );

        tx_idx = ( vlc->tx_prod++ % VELOCITY_TXDESC_NUM );
        desc = &vlc->tx_ring[tx_idx];

        /* Set packet size and transfer ownership to NIC */
        desc->des0 = cpu_to_le32 ( VELOCITY_DES0_OWN |
                                   VELOCITY_DES2_SIZE ( iob_len ( iobuf ) ) );
        /* Data in first desc fragment, only desc for packet, generate INT */
        desc->des1 = cpu_to_le32 ( VELOCITY_DES1_FRAG ( 1 ) |
                                   VELOCITY_DES1_TCPLS |
                                   VELOCITY_DES1_INTR );

        desc->frags[0].addr = virt_to_le32bus ( iobuf->data );
        desc->frags[0].des2 = cpu_to_le32 (
                              VELOCITY_DES2_SIZE ( iob_len ( iobuf ) ) );

        wmb();

        /* Initiate TX */
        velocity_setbit ( vlc->regs + VELOCITY_TXQCSRS, VELOCITY_TXQCSRS_WAK0 );

        DBGC2 ( vlc, "VELOCITY %p tx_prod=%d desc=%p iobuf=%p len=%zd\n",
                vlc, tx_idx, desc, iobuf->data, iob_len ( iobuf ) );

        return 0;
}

References cpu_to_le32, io_buffer::data, DBGC2, desc, ETH_ZLEN, iob_len(), iob_pad(), netdev, net_device::priv, velocity_nic::regs, velocity_nic::tx_prod, velocity_nic::tx_ring, VELOCITY_DES0_OWN, VELOCITY_DES1_FRAG, VELOCITY_DES1_INTR, VELOCITY_DES1_TCPLS, VELOCITY_DES2_SIZE, velocity_setbit, VELOCITY_TXDESC_NUM, VELOCITY_TXQCSRS, VELOCITY_TXQCSRS_WAK0, virt_to_le32bus, and wmb().

velocity_poll_rx()

static void velocity_poll_rx ( struct velocity_nic *  vlc )

static

Poll for received packets.

Parameters

vlc	Velocity device

Definition at line 557 of file velocity.c.

                                                          {
        struct velocity_rx_descriptor *desc;
        struct io_buffer *iobuf;
        int rx_idx;
        size_t len;
        uint32_t des0;

        /* Check for packets */
        while ( vlc->rx_cons != vlc->rx_prod ) {
                rx_idx = ( vlc->rx_cons % VELOCITY_RXDESC_NUM );
                desc = &vlc->rx_ring[rx_idx];

                des0 = cpu_to_le32 ( desc->des0 );

                /* Return if descriptor still in use */
                if ( des0 & VELOCITY_DES0_OWN )
                        return;

                iobuf = vlc->rx_buffs[rx_idx];

                /* Get length, strip CRC */
                len = VELOCITY_DES0_RMBC ( des0 ) - 4;
                iob_put ( iobuf, len );

                DBGC2 ( vlc, "VELOCITY %p got packet on idx=%d (prod=%d), len %zd\n",
                    vlc, rx_idx, vlc->rx_prod % VELOCITY_RXDESC_NUM, len );

                if ( des0 & VELOCITY_DES0_RX_ERR ) {
                        /* Report receive error */
                        netdev_rx_err ( vlc->netdev, iobuf, -EINVAL );
                        DBGC ( vlc, "VELOCITY %p receive error, status: %02x\n",
                               vlc, des0 );
                } else if ( des0 & VELOCITY_DES0_RXOK ) {
                        /* Report receive success */
                        netdev_rx( vlc->netdev, iobuf );
                } else {
                        /* Card indicated neither success nor failure
                         * Technically this shouldn't happen, but we saw it
                         * in debugging once. */
                        DBGC ( vlc, "VELOCITY %p RX neither ERR nor OK: %04x\n",
                               vlc, des0 );
                        DBGC ( vlc, "packet len: %zd\n", len );
                        DBGC_HD ( vlc, iobuf->data, 64 );

                        /* we don't know what it is, treat is as an error */
                        netdev_rx_err ( vlc->netdev, iobuf, -EINVAL );
                }

                vlc->rx_cons++;
        }
}

References cpu_to_le32, io_buffer::data, DBGC, DBGC2, DBGC_HD, des0, desc, EINVAL, iob_put, len, velocity_nic::netdev, netdev_rx(), netdev_rx_err(), velocity_nic::rx_buffs, velocity_nic::rx_cons, velocity_nic::rx_prod, velocity_nic::rx_ring, VELOCITY_DES0_OWN, VELOCITY_DES0_RMBC, VELOCITY_DES0_RX_ERR, VELOCITY_DES0_RXOK, and VELOCITY_RXDESC_NUM.

Referenced by velocity_poll().

velocity_poll_tx()

static void velocity_poll_tx ( struct velocity_nic *  vlc )

static

Poll for completed packets.

Parameters

vlc	Velocity device

Definition at line 614 of file velocity.c.

                                                          {
        struct velocity_tx_descriptor *desc;
        int tx_idx;

        /* Check for packets */
        while ( vlc->tx_cons != vlc->tx_prod ) {
                tx_idx = ( vlc->tx_cons % VELOCITY_TXDESC_NUM );
                desc = &vlc->tx_ring[tx_idx];

                /* Return if descriptor still in use */
                if ( le32_to_cpu ( desc->des0 ) & VELOCITY_DES0_OWN )
                        return;

                /* Report errors */
                if ( le32_to_cpu ( desc->des0 ) & VELOCITY_DES0_TERR ) {
                        netdev_tx_complete_next_err ( vlc->netdev, -EINVAL );
                        return;
                }

                netdev_tx_complete_next ( vlc->netdev );

                DBGC2 ( vlc, "VELOCITY %p poll_tx cons=%d prod=%d tsr=%04x\n",
                        vlc, tx_idx, vlc->tx_prod % VELOCITY_TXDESC_NUM,
                        ( desc->des0 & 0xffff ) );
                vlc->tx_cons++;
        }
}

References DBGC2, desc, EINVAL, le32_to_cpu, velocity_nic::netdev, netdev_tx_complete_next(), netdev_tx_complete_next_err(), velocity_nic::tx_cons, velocity_nic::tx_prod, velocity_nic::tx_ring, VELOCITY_DES0_OWN, VELOCITY_DES0_TERR, and VELOCITY_TXDESC_NUM.

Referenced by velocity_poll().

velocity_poll()

static void velocity_poll ( struct net_device *  netdev )

static

Poll for completed and received packets.

Parameters

netdev

Network device

Definition at line 647 of file velocity.c.

                                                        {
        struct velocity_nic *vlc = netdev->priv;
        uint8_t isr1;

        isr1 = readb ( vlc->regs + VELOCITY_ISR1 );

        /* ACK interrupts */
        writew ( 0xFFFF, vlc->regs + VELOCITY_ISR0 );

        /* Check for competed packets */
        velocity_poll_rx ( vlc );
        velocity_poll_tx ( vlc );

        if ( isr1 & VELOCITY_ISR1_SRCI ) {
                /* Update linkstate */
                DBGC2 ( vlc, "VELOCITY %p link status interrupt\n", vlc );
                velocity_check_link ( netdev );
        }

        velocity_refill_rx ( vlc );

        /* deal with potential RX stall caused by RX ring underrun */
        writew ( VELOCITY_RXQCSR_RUN | VELOCITY_RXQCSR_WAK,
                 vlc->regs + VELOCITY_RXQCSRS );
}

References DBGC2, netdev, net_device::priv, readb(), velocity_nic::regs, velocity_check_link(), VELOCITY_ISR0, VELOCITY_ISR1, VELOCITY_ISR1_SRCI, velocity_poll_rx(), velocity_poll_tx(), velocity_refill_rx(), VELOCITY_RXQCSR_RUN, VELOCITY_RXQCSR_WAK, VELOCITY_RXQCSRS, and writew.

velocity_irq()

static void velocity_irq ( struct net_device *  netdev, int  enable  )

static

Enable or disable interrupts.

Parameters

netdev	Network device
enable	Interrupts should be enabled

Definition at line 679 of file velocity.c.

                                                                   {
        struct velocity_nic *vlc = netdev->priv;

        DBGC ( vlc, "VELOCITY %p interrupts %s\n", vlc,
            enable ? "enable" : "disable" );

        if (enable) {
                /* Enable interrupts */
                writeb ( VELOCITY_CR3_GINTMSK1, vlc->regs + VELOCITY_CRS3 );
        } else {
                /* Disable interrupts */
                writeb ( VELOCITY_CR3_GINTMSK1, vlc->regs + VELOCITY_CRC3 );
        }
}

References DBGC, netdev, net_device::priv, velocity_nic::regs, VELOCITY_CR3_GINTMSK1, VELOCITY_CRC3, VELOCITY_CRS3, and writeb().

velocity_probe()

static int velocity_probe ( struct pci_device *  pci )

static

Probe PCI device.

Parameters

pci	PCI device

Return values

rc	Return status code

Definition at line 716 of file velocity.c.

                                                     {
        struct net_device *netdev;
        struct velocity_nic *vlc;
        int rc;

        /* Allocate and initialise net device */
        netdev = alloc_etherdev ( sizeof ( *vlc ) );
        if ( ! netdev ) {
                rc = -ENOMEM;
                goto err_alloc;
        }
        netdev_init ( netdev, &velocity_operations );
        vlc = netdev->priv;
        pci_set_drvdata ( pci, netdev );
        netdev->dev = &pci->dev;

        /* Fix up PCI device */
        adjust_pci_device ( pci );

        /* Map registers */
        vlc->regs = pci_ioremap ( pci, pci->membase, VELOCITY_BAR_SIZE );
        vlc->netdev = netdev;

        /* Reset the NIC */
        if ( ( rc = velocity_reset ( vlc ) ) != 0 )
                goto err_reset;

        /* Reload EEPROM */
        if ( ( rc = velocity_reload_eeprom ( vlc ) ) != 0 )
                goto err_reset;

        /* Get MAC address */
        netdev->hw_addr[0] = readb ( vlc->regs + VELOCITY_MAC0 );
        netdev->hw_addr[1] = readb ( vlc->regs + VELOCITY_MAC1 );
        netdev->hw_addr[2] = readb ( vlc->regs + VELOCITY_MAC2 );
        netdev->hw_addr[3] = readb ( vlc->regs + VELOCITY_MAC3 );
        netdev->hw_addr[4] = readb ( vlc->regs + VELOCITY_MAC4 );
        netdev->hw_addr[5] = readb ( vlc->regs + VELOCITY_MAC5 );

        /* Initialise and reset MII interface */
        mdio_init ( &vlc->mdio, &velocity_mii_operations );
        mii_init ( &vlc->mii, &vlc->mdio, 0 );
        if ( ( rc = mii_reset ( &vlc->mii ) ) != 0 ) {
                DBGC ( vlc, "VELOCITY %p could not reset MII: %s\n",
                       vlc, strerror ( rc ) );
                goto err_mii_reset;
        }

        /* Enable proper link advertising */
        velocity_set_link ( vlc );

        /* Register network device */
        if ( ( rc = register_netdev ( netdev ) ) != 0 )
                goto err_register_netdev;

        return 0;

 err_register_netdev:
 err_mii_reset:
        velocity_reset ( vlc );
 err_reset:
        netdev_nullify ( netdev );
        netdev_put ( netdev );
 err_alloc:
        return rc;
}

References adjust_pci_device(), alloc_etherdev(), DBGC, pci_device::dev, net_device::dev, ENOMEM, net_device::hw_addr, velocity_nic::mdio, mdio_init(), pci_device::membase, velocity_nic::mii, mii_init(), mii_reset(), netdev, velocity_nic::netdev, netdev_init(), netdev_nullify(), netdev_put(), pci_ioremap(), pci_set_drvdata(), net_device::priv, rc, readb(), register_netdev(), velocity_nic::regs, strerror(), VELOCITY_BAR_SIZE, VELOCITY_MAC0, VELOCITY_MAC1, VELOCITY_MAC2, VELOCITY_MAC3, VELOCITY_MAC4, VELOCITY_MAC5, velocity_mii_operations, velocity_operations, velocity_reload_eeprom(), velocity_reset(), and velocity_set_link().

velocity_remove()

static void velocity_remove ( struct pci_device *  pci )

static

Remove PCI device.

Parameters

pci	PCI device

Definition at line 788 of file velocity.c.

                                                       {
        struct net_device *netdev = pci_get_drvdata ( pci );
        struct velocity_nic *vlc = netdev->priv;

        /* Unregister network device */
        unregister_netdev ( netdev );

        /* Reset card */
        velocity_reset ( vlc );

        /* Free network device */
        netdev_nullify ( netdev );
        netdev_put ( netdev );
}

References netdev, netdev_nullify(), netdev_put(), pci_get_drvdata(), net_device::priv, unregister_netdev(), and velocity_reset().

Variable Documentation

velocity_mii_operations

struct mii_operations velocity_mii_operations

static

Initial value:

= {
        .read = velocity_mii_read,
        .write = velocity_mii_write,
}

Velocity MII operations.

Definition at line 187 of file velocity.c.

Referenced by velocity_probe().

velocity_operations

struct net_device_operations velocity_operations

static

Initial value:

= {
        .open           = velocity_open,
        .close          = velocity_close,
        .transmit       = velocity_transmit,
        .poll           = velocity_poll,
        .irq            = velocity_irq,
}

Velocity network device operations.

Definition at line 695 of file velocity.c.

Referenced by velocity_probe().

velocity_nics

struct pci_device_id velocity_nics[]

static

Initial value:

= {
        PCI_ROM ( 0x1106, 0x3119, "vt6122",     "VIA Velocity", 0 ),
}

Velocity PCI device IDs.

Definition at line 804 of file velocity.c.

__pci_driver

struct pci_driver velocity_driver __pci_driver

Initial value:

= {
        .ids = velocity_nics,
        .id_count = ( sizeof ( velocity_nics ) / sizeof ( velocity_nics[0] ) ),
        .probe = velocity_probe,
        .remove = velocity_remove,
}

Velocity PCI driver.

Definition at line 809 of file velocity.c.