rhine.c File Reference

VIA Rhine 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 "rhine.h"

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER)
static int	rhine_mii_read (struct mii_interface *mdio, unsigned int phy __unused, unsigned int reg)
	Read from MII register. More...
static int	rhine_mii_write (struct mii_interface *mdio, unsigned int phy __unused, unsigned int reg, unsigned int data)
	Write to MII register. More...
static int	rhine_mii_autopoll (struct rhine_nic *rhn)
	Enable auto-polling. More...
static int	rhine_reset (struct rhine_nic *rhn)
	Reset hardware. More...
static void	rhine_enable_mmio (struct rhine_nic *rhn, int revision)
	Enable MMIO register access. More...
static int	rhine_reload_eeprom (struct rhine_nic *rhn)
	Reload EEPROM contents. More...
static void	rhine_check_link (struct net_device *netdev)
	Check link state. More...
static int	rhine_create_ring (struct rhine_nic *rhn, struct rhine_ring *ring)
	Create descriptor ring. More...
static void	rhine_destroy_ring (struct rhine_nic *rhn, struct rhine_ring *ring)
	Destroy descriptor ring. More...
static void	rhine_refill_rx (struct rhine_nic *rhn)
	Refill RX descriptor ring. More...
static int	rhine_open (struct net_device *netdev)
	Open network device. More...
static void	rhine_close (struct net_device *netdev)
	Close network device. More...
static int	rhine_transmit (struct net_device *netdev, struct io_buffer *iobuf)
	Transmit packet. More...
static void	rhine_poll_tx (struct net_device *netdev)
	Poll for completed packets. More...
static void	rhine_poll_rx (struct net_device *netdev)
	Poll for received packets. More...
static void	rhine_poll (struct net_device *netdev)
	Poll for completed and received packets. More...
static void	rhine_irq (struct net_device *netdev, int enable)
	Enable or disable interrupts. More...
static int	rhine_probe (struct pci_device *pci)
	Probe PCI device. More...
static void	rhine_remove (struct pci_device *pci)
	Remove PCI device. More...

Variables
static struct mii_operations	rhine_mii_operations
	Rhine MII operations. More...
static struct net_device_operations	rhine_operations
	Rhine network device operations. More...
static struct pci_device_id	rhine_nics []
	Rhine PCI device IDs. More...
struct pci_driver rhine_driver	__pci_driver
	Rhine PCI driver. More...

Detailed Description

VIA Rhine network driver.

Definition in file rhine.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER

)

rhine_mii_read()

static int rhine_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 57 of file rhine.c.

                                                                          {
        struct rhine_nic *rhn = container_of ( mdio, struct rhine_nic, mdio );
        unsigned int timeout = RHINE_TIMEOUT_US;
        uint8_t cr;

        DBGC2 ( rhn, "RHINE %p MII read reg %d\n", rhn, reg );

        /* Initiate read */
        writeb ( reg, rhn->regs + RHINE_MII_ADDR );
        cr = readb ( rhn->regs + RHINE_MII_CR );
        writeb ( ( cr | RHINE_MII_CR_RDEN ), rhn->regs + RHINE_MII_CR );

        /* Wait for read to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                cr = readb ( rhn->regs + RHINE_MII_CR );
                if ( ! ( cr & RHINE_MII_CR_RDEN ) )
                        return readw ( rhn->regs + RHINE_MII_RDWR );
        }

        DBGC ( rhn, "RHINE %p MII read timeout\n", rhn );
        return -ETIMEDOUT;
}

References container_of, cr, DBGC, DBGC2, ETIMEDOUT, rhine_nic::mdio, readb(), readw(), reg, rhine_nic::regs, RHINE_MII_ADDR, RHINE_MII_CR, RHINE_MII_CR_RDEN, RHINE_MII_RDWR, RHINE_TIMEOUT_US, timeout(), udelay(), and writeb().

rhine_mii_write()

static int rhine_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 91 of file rhine.c.

                                                 {
        struct rhine_nic *rhn = container_of ( mdio, struct rhine_nic, mdio );
        unsigned int timeout = RHINE_TIMEOUT_US;
        uint8_t cr;

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

        /* Initiate write */
        writeb ( reg, rhn->regs + RHINE_MII_ADDR );
        writew ( data, rhn->regs + RHINE_MII_RDWR );
        cr = readb ( rhn->regs + RHINE_MII_CR );
        writeb ( ( cr | RHINE_MII_CR_WREN ), rhn->regs + RHINE_MII_CR );

        /* Wait for write to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                cr = readb ( rhn->regs + RHINE_MII_CR );
                if ( ! ( cr & RHINE_MII_CR_WREN ) )
                        return 0;
        }

        DBGC ( rhn, "RHINE %p MII write timeout\n", rhn );
        return -ETIMEDOUT;
}

References container_of, cr, data, DBGC, DBGC2, ETIMEDOUT, rhine_nic::mdio, readb(), reg, rhine_nic::regs, RHINE_MII_ADDR, RHINE_MII_CR, RHINE_MII_CR_WREN, RHINE_MII_RDWR, RHINE_TIMEOUT_US, timeout(), udelay(), writeb(), and writew.

rhine_mii_autopoll()

static int rhine_mii_autopoll ( struct rhine_nic *  rhn )

static

Enable auto-polling.

Parameters

rhn	Rhine device

Return values

rc	Return status code

This is voodoo. There seems to be no documentation on exactly what we are waiting for, or why we have to do anything other than simply turn the feature on.

Definition at line 135 of file rhine.c.

                                                        {
        unsigned int timeout = RHINE_TIMEOUT_US;
        uint8_t addr;

        /* Initiate auto-polling */
        writeb ( MII_BMSR, rhn->regs + RHINE_MII_ADDR );
        writeb ( RHINE_MII_CR_AUTOPOLL, rhn->regs + RHINE_MII_CR );

        /* Wait for auto-polling to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                addr = readb ( rhn->regs + RHINE_MII_ADDR );
                if ( ! ( addr & RHINE_MII_ADDR_MDONE ) ) {
                        writeb ( ( MII_BMSR | RHINE_MII_ADDR_MSRCEN ),
                                 rhn->regs + RHINE_MII_ADDR );
                        return 0;
                }
        }

        DBGC ( rhn, "RHINE %p MII auto-poll timeout\n", rhn );
        return -ETIMEDOUT;
}

References addr, DBGC, ETIMEDOUT, MII_BMSR, readb(), rhine_nic::regs, RHINE_MII_ADDR, RHINE_MII_ADDR_MDONE, RHINE_MII_ADDR_MSRCEN, RHINE_MII_CR, RHINE_MII_CR_AUTOPOLL, RHINE_TIMEOUT_US, timeout(), udelay(), and writeb().

Referenced by rhine_open().

rhine_reset()

static int rhine_reset ( struct rhine_nic *  rhn )

static

Reset hardware.

Parameters

rhn	Rhine device

Return values

rc	Return status code

We're using PIO because this might reset the MMIO enable bit.

Definition at line 173 of file rhine.c.

                                                 {
        unsigned int timeout = RHINE_TIMEOUT_US;
        uint8_t cr1;

        DBGC ( rhn, "RHINE %p reset\n", rhn );

        /* Initiate reset */
        outb ( RHINE_CR1_RESET, rhn->ioaddr + RHINE_CR1 );

        /* Wait for reset to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                cr1 = inb ( rhn->ioaddr + RHINE_CR1 );
                if ( ! ( cr1 & RHINE_CR1_RESET ) )
                        return 0;
        }

        DBGC ( rhn, "RHINE %p reset timeout\n", rhn );
        return -ETIMEDOUT;
}

References DBGC, ETIMEDOUT, inb(), rhine_nic::ioaddr, outb, RHINE_CR1, RHINE_CR1_RESET, RHINE_TIMEOUT_US, timeout(), and udelay().

Referenced by rhine_probe(), and rhine_remove().

rhine_enable_mmio()

static void rhine_enable_mmio ( struct rhine_nic *  rhn, int  revision  )

static

Enable MMIO register access.

Parameters

rhn	Rhine device
revision	Card revision

Definition at line 200 of file rhine.c.

                                                                      {
        uint8_t conf;

        if ( revision < RHINE_REVISION_OLD ) {
                conf = inb ( rhn->ioaddr + RHINE_CHIPCFG_A );
                outb ( ( conf | RHINE_CHIPCFG_A_MMIO ),
                       rhn->ioaddr + RHINE_CHIPCFG_A );
        } else {
                conf = inb ( rhn->ioaddr + RHINE_CHIPCFG_D );
                outb ( ( conf | RHINE_CHIPCFG_D_MMIO ),
                       rhn->ioaddr + RHINE_CHIPCFG_D );
        }
}

References inb(), rhine_nic::ioaddr, outb, revision, RHINE_CHIPCFG_A, RHINE_CHIPCFG_A_MMIO, RHINE_CHIPCFG_D, RHINE_CHIPCFG_D_MMIO, and RHINE_REVISION_OLD.

Referenced by rhine_probe().

rhine_reload_eeprom()

static int rhine_reload_eeprom ( struct rhine_nic *  rhn )

static

Reload EEPROM contents.

Parameters

rhn	Rhine device

Return values

rc	Return status code

We're using PIO because this might reset the MMIO enable bit.

Definition at line 222 of file rhine.c.

                                                         {
        unsigned int timeout = RHINE_TIMEOUT_US;
        uint8_t eeprom;

        /* Initiate reload */
        eeprom = inb ( rhn->ioaddr + RHINE_EEPROM_CTRL );
        outb ( ( eeprom | RHINE_EEPROM_CTRL_RELOAD ),
               rhn->ioaddr + RHINE_EEPROM_CTRL );

        /* Wait for reload to complete */
        while ( timeout-- ) {
                udelay ( 1 );
                eeprom = inb ( rhn->ioaddr + RHINE_EEPROM_CTRL );
                if ( ! ( eeprom & RHINE_EEPROM_CTRL_RELOAD ) )
                        return 0;
        }

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

References DBGC, ETIMEDOUT, inb(), rhine_nic::ioaddr, outb, RHINE_EEPROM_CTRL, RHINE_EEPROM_CTRL_RELOAD, RHINE_TIMEOUT_US, timeout(), and udelay().

Referenced by rhine_probe().

rhine_check_link()

static void rhine_check_link ( struct net_device *  netdev )

static

Check link state.

Parameters

netdev

Network device

Definition at line 255 of file rhine.c.

                                                           {
        struct rhine_nic *rhn = netdev->priv;
        uint8_t mii_sr;

        /* Read MII status register */
        mii_sr = readb ( rhn->regs + RHINE_MII_SR );
        DBGC ( rhn, "RHINE %p link status %02x\n", rhn, mii_sr );

        /* Report link state */
        if ( ! ( mii_sr & RHINE_MII_SR_LINKPOLL ) ) {
                netdev_link_up ( netdev );
        } else if ( mii_sr & RHINE_MII_SR_PHYERR ) {
                netdev_link_err ( netdev, -EIO );
        } else {
                netdev_link_down ( netdev );
        }
}

References DBGC, EIO, netdev, netdev_link_down(), netdev_link_err(), netdev_link_up(), net_device::priv, readb(), rhine_nic::regs, RHINE_MII_SR, RHINE_MII_SR_LINKPOLL, and RHINE_MII_SR_PHYERR.

Referenced by rhine_open(), rhine_poll(), and rhine_probe().

rhine_create_ring()

static int rhine_create_ring ( struct rhine_nic *  rhn, struct rhine_ring *  ring  )

static

Create descriptor ring.

Parameters

rhn	Rhine device
ring	Descriptor ring

Return values

rc	Return status code

Definition at line 287 of file rhine.c.

                                                         {
        size_t len = ( ring->count * sizeof ( ring->desc[0] ) );
        struct rhine_descriptor *next;
        physaddr_t address;
        unsigned int i;

        /* Allocate descriptors */
        ring->desc = malloc_phys ( len, RHINE_RING_ALIGN );
        if ( ! ring->desc )
                return -ENOMEM;

        /* Initialise descriptor ring */
        memset ( ring->desc, 0, len );
        for ( i = 0 ; i < ring->count ; i++ ) {
                next = &ring->desc[ ( i + 1 ) % ring->count ];
                ring->desc[i].next = cpu_to_le32 ( virt_to_bus ( next ) );
        }

        /* Program ring address */
        address = virt_to_bus ( ring->desc );
        writel ( address, rhn->regs + ring->reg );

        DBGC ( rhn, "RHINE %p ring %02x is at [%08llx,%08llx)\n",
               rhn, ring->reg, ( ( unsigned long long ) address ),
               ( ( unsigned long long ) address + len ) );

        return 0;
}

References address, rhine_ring::count, cpu_to_le32, DBGC, rhine_ring::desc, ENOMEM, len, malloc_phys(), memset(), next, rhine_descriptor::next, rhine_ring::reg, rhine_nic::regs, RHINE_RING_ALIGN, virt_to_bus(), and writel().

Referenced by rhine_open().

rhine_destroy_ring()

static void rhine_destroy_ring ( struct rhine_nic *  rhn, struct rhine_ring *  ring  )

static

Destroy descriptor ring.

Parameters

rhn	Rhine device
ring	Descriptor ring

Definition at line 323 of file rhine.c.

                                                           {
        size_t len = ( ring->count * sizeof ( ring->desc[0] ) );

        /* Clear ring address */
        writel ( 0, rhn->regs + ring->reg );

        /* Free descriptor ring */
        free_phys ( ring->desc, len );
        ring->desc = NULL;
        ring->prod = 0;
        ring->cons = 0;
}

References rhine_ring::cons, rhine_ring::count, rhine_ring::desc, free_phys(), len, NULL, rhine_ring::prod, rhine_ring::reg, rhine_nic::regs, and writel().

Referenced by rhine_close(), and rhine_open().

rhine_refill_rx()

static void rhine_refill_rx ( struct rhine_nic *  rhn )

static

Refill RX descriptor ring.

Parameters

rhn	Rhine device

Definition at line 342 of file rhine.c.

                                                      {
        struct rhine_descriptor *desc;
        struct io_buffer *iobuf;
        unsigned int rx_idx;
        physaddr_t address;

        while ( ( rhn->rx.prod - rhn->rx.cons ) < RHINE_RXDESC_NUM ) {

                /* Allocate I/O buffer */
                iobuf = alloc_iob ( RHINE_RX_MAX_LEN );
                if ( ! iobuf ) {
                        /* Wait for next refill */
                        return;
                }

                /* Populate next receive descriptor */
                rx_idx = ( rhn->rx.prod++ % RHINE_RXDESC_NUM );
                desc = &rhn->rx.desc[rx_idx];
                address = virt_to_bus ( iobuf->data );
                desc->buffer = cpu_to_le32 ( address );
                desc->des1 =
                        cpu_to_le32 ( RHINE_DES1_SIZE ( RHINE_RX_MAX_LEN - 1) |
                                      RHINE_DES1_CHAIN | RHINE_DES1_IC );
                wmb();
                desc->des0 = cpu_to_le32 ( RHINE_DES0_OWN );

                /* Record I/O buffer */
                rhn->rx_iobuf[rx_idx] = iobuf;

                DBGC2 ( rhn, "RHINE %p RX %d is [%llx,%llx)\n", rhn, rx_idx,
                        ( ( unsigned long long ) address ),
                        ( ( unsigned long long ) address + RHINE_RX_MAX_LEN ) );
        }
}

References address, alloc_iob(), rhine_descriptor::buffer, rhine_ring::cons, cpu_to_le32, io_buffer::data, DBGC2, rhine_descriptor::des0, rhine_descriptor::des1, rhine_ring::desc, rhine_ring::prod, RHINE_DES0_OWN, RHINE_DES1_CHAIN, RHINE_DES1_IC, RHINE_DES1_SIZE, RHINE_RX_MAX_LEN, RHINE_RXDESC_NUM, rhine_nic::rx, rhine_nic::rx_iobuf, virt_to_bus(), and wmb().

Referenced by rhine_open(), and rhine_poll().

rhine_open()

static int rhine_open ( struct net_device *  netdev )

static

Open network device.

Parameters

netdev

Network device

Return values

rc	Return status code

Definition at line 383 of file rhine.c.

                                                    {
        struct rhine_nic *rhn = netdev->priv;
        int rc;

        /* Create transmit ring */
        if ( ( rc = rhine_create_ring ( rhn, &rhn->tx ) ) != 0 )
                goto err_create_tx;

        /* Create receive ring */
        if ( ( rc = rhine_create_ring ( rhn, &rhn->rx ) ) != 0 )
                goto err_create_rx;

        /* Set receive configuration */
        writeb ( ( RHINE_RCR_PHYS_ACCEPT | RHINE_RCR_BCAST_ACCEPT |
                   RHINE_RCR_RUNT_ACCEPT ), rhn->regs + RHINE_RCR );

        /* Enable link status monitoring */
        if ( ( rc = rhine_mii_autopoll ( rhn ) ) != 0 )
                goto err_mii_autopoll;

        /* Some cards need an extra delay(observed with VT6102) */
        mdelay ( 10 );

        /* Enable RX/TX of packets */
        writeb ( ( RHINE_CR0_STARTNIC | RHINE_CR0_RXEN | RHINE_CR0_TXEN ),
                 rhn->regs + RHINE_CR0 );

        /* Enable auto polling and full duplex operation */
        rhn->cr1 = RHINE_CR1_FDX;
        writeb ( rhn->cr1, rhn->regs + RHINE_CR1 );

        /* Refill RX ring */
        rhine_refill_rx ( rhn );

        /* Update link state */
        rhine_check_link ( netdev );

        return 0;

 err_mii_autopoll:
        rhine_destroy_ring ( rhn, &rhn->rx );
 err_create_rx:
        rhine_destroy_ring ( rhn, &rhn->tx );
 err_create_tx:
        return rc;
}

References rhine_nic::cr1, mdelay(), netdev, net_device::priv, rc, rhine_nic::regs, rhine_check_link(), RHINE_CR0, RHINE_CR0_RXEN, RHINE_CR0_STARTNIC, RHINE_CR0_TXEN, RHINE_CR1, RHINE_CR1_FDX, rhine_create_ring(), rhine_destroy_ring(), rhine_mii_autopoll(), RHINE_RCR, RHINE_RCR_BCAST_ACCEPT, RHINE_RCR_PHYS_ACCEPT, RHINE_RCR_RUNT_ACCEPT, rhine_refill_rx(), rhine_nic::rx, rhine_nic::tx, and writeb().

rhine_close()

static void rhine_close ( struct net_device *  netdev )

static

Close network device.

Parameters

netdev

Network device

Definition at line 435 of file rhine.c.

                                                      {
        struct rhine_nic *rhn = netdev->priv;
        unsigned int i;

        /* Disable interrupts */
        writeb ( 0, RHINE_IMR0 );
        writeb ( 0, RHINE_IMR1 );

        /* Stop card, clear RXON and TXON bits */
        writeb ( RHINE_CR0_STOPNIC, rhn->regs + RHINE_CR0 );

        /* Destroy receive ring */
        rhine_destroy_ring ( rhn, &rhn->rx );

        /* Discard any unused receive buffers */
        for ( i = 0 ; i < RHINE_RXDESC_NUM ; i++ ) {
                if ( rhn->rx_iobuf[i] )
                        free_iob ( rhn->rx_iobuf[i] );
                rhn->rx_iobuf[i] = NULL;
        }

        /* Destroy transmit ring */
        rhine_destroy_ring ( rhn, &rhn->tx );
}

References free_iob(), netdev, NULL, net_device::priv, rhine_nic::regs, RHINE_CR0, RHINE_CR0_STOPNIC, rhine_destroy_ring(), RHINE_IMR0, RHINE_IMR1, RHINE_RXDESC_NUM, rhine_nic::rx, rhine_nic::rx_iobuf, rhine_nic::tx, and writeb().

rhine_transmit()

static int rhine_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 467 of file rhine.c.

                                                      {
        struct rhine_nic *rhn = netdev->priv;
        struct rhine_descriptor *desc;
        physaddr_t address;
        unsigned int tx_idx;

        /* Get next transmit descriptor */
        if ( ( rhn->tx.prod - rhn->tx.cons ) >= RHINE_TXDESC_NUM )
                return -ENOBUFS;
        tx_idx = ( rhn->tx.prod++ % RHINE_TXDESC_NUM );
        desc = &rhn->tx.desc[tx_idx];

        /* Pad and align packet */
        iob_pad ( iobuf, ETH_ZLEN );
        address = virt_to_bus ( iobuf->data );

        /* Populate transmit descriptor */
        desc->buffer = cpu_to_le32 ( address );
        desc->des1 = cpu_to_le32 ( RHINE_DES1_IC | RHINE_TDES1_STP |
                                   RHINE_TDES1_EDP | RHINE_DES1_CHAIN |
                                   RHINE_DES1_SIZE ( iob_len ( iobuf ) ) );
        wmb();
        desc->des0 = cpu_to_le32 ( RHINE_DES0_OWN );
        wmb();

        /* Notify card that there are packets ready to transmit */
        writeb ( ( rhn->cr1 | RHINE_CR1_TXPOLL ), rhn->regs + RHINE_CR1 );

        DBGC2 ( rhn, "RHINE %p TX %d is [%llx,%llx)\n", rhn, tx_idx,
                ( ( unsigned long long ) address ),
                ( ( unsigned long long ) address + iob_len ( iobuf ) ) );

        return 0;
}

References address, rhine_descriptor::buffer, rhine_ring::cons, cpu_to_le32, rhine_nic::cr1, io_buffer::data, DBGC2, rhine_descriptor::des0, rhine_descriptor::des1, rhine_ring::desc, ENOBUFS, ETH_ZLEN, iob_len(), iob_pad(), netdev, net_device::priv, rhine_ring::prod, rhine_nic::regs, RHINE_CR1, RHINE_CR1_TXPOLL, RHINE_DES0_OWN, RHINE_DES1_CHAIN, RHINE_DES1_IC, RHINE_DES1_SIZE, RHINE_TDES1_EDP, RHINE_TDES1_STP, RHINE_TXDESC_NUM, rhine_nic::tx, virt_to_bus(), wmb(), and writeb().

rhine_poll_tx()

static void rhine_poll_tx ( struct net_device *  netdev )

static

Poll for completed packets.

Parameters

netdev

Network device

Definition at line 508 of file rhine.c.

                                                        {
        struct rhine_nic *rhn = netdev->priv;
        struct rhine_descriptor *desc;
        unsigned int tx_idx;
        uint32_t des0;

        /* Check for completed packets */
        while ( rhn->tx.cons != rhn->tx.prod ) {

                /* Get next transmit descriptor */
                tx_idx = ( rhn->tx.cons % RHINE_TXDESC_NUM );
                desc = &rhn->tx.desc[tx_idx];

                /* Stop if descriptor is still in use */
                if ( desc->des0 & cpu_to_le32 ( RHINE_DES0_OWN ) )
                        return;

                /* Complete TX descriptor */
                des0 = le32_to_cpu ( desc->des0 );
                if ( des0 & RHINE_TDES0_TERR ) {
                        DBGC ( rhn, "RHINE %p TX %d error (DES0 %08x)\n",
                               rhn, tx_idx, des0 );
                        netdev_tx_complete_next_err ( netdev, -EIO );
                } else {
                        DBGC2 ( rhn, "RHINE %p TX %d complete\n", rhn, tx_idx );
                        netdev_tx_complete_next ( netdev );
                }
                rhn->tx.cons++;
        }
}

References rhine_ring::cons, cpu_to_le32, DBGC, DBGC2, des0, rhine_descriptor::des0, rhine_ring::desc, EIO, le32_to_cpu, netdev, netdev_tx_complete_next(), netdev_tx_complete_next_err(), net_device::priv, rhine_ring::prod, RHINE_DES0_OWN, RHINE_TDES0_TERR, RHINE_TXDESC_NUM, and rhine_nic::tx.

Referenced by rhine_poll().

rhine_poll_rx()

static void rhine_poll_rx ( struct net_device *  netdev )

static

Poll for received packets.

Parameters

netdev

Network device

Definition at line 544 of file rhine.c.

                                                        {
        struct rhine_nic *rhn = netdev->priv;
        struct rhine_descriptor *desc;
        struct io_buffer *iobuf;
        unsigned int rx_idx;
        uint32_t des0;
        size_t len;

        /* Check for received packets */
        while ( rhn->rx.cons != rhn->rx.prod ) {

                /* Get next receive descriptor */
                rx_idx = ( rhn->rx.cons % RHINE_RXDESC_NUM );
                desc = &rhn->rx.desc[rx_idx];

                /* Stop if descriptor is still in use */
                if ( desc->des0 & cpu_to_le32 ( RHINE_DES0_OWN ) )
                        return;

                /* Populate I/O buffer */
                iobuf = rhn->rx_iobuf[rx_idx];
                rhn->rx_iobuf[rx_idx] = NULL;
                des0 = le32_to_cpu ( desc->des0 );
                len = ( RHINE_DES0_GETSIZE ( des0 ) - 4 /* strip CRC */ );
                iob_put ( iobuf, len );

                /* Hand off to network stack */
                if ( des0 & RHINE_RDES0_RXOK ) {
                        DBGC2 ( rhn, "RHINE %p RX %d complete (length %zd)\n",
                                rhn, rx_idx, len );
                        netdev_rx ( netdev, iobuf );
                } else {
                        DBGC ( rhn, "RHINE %p RX %d error (length %zd, DES0 "
                               "%08x)\n", rhn, rx_idx, len, des0 );
                        netdev_rx_err ( netdev, iobuf, -EIO );
                }
                rhn->rx.cons++;
        }
}

References rhine_ring::cons, cpu_to_le32, DBGC, DBGC2, des0, rhine_descriptor::des0, rhine_ring::desc, EIO, iob_put, le32_to_cpu, len, netdev, netdev_rx(), netdev_rx_err(), NULL, net_device::priv, rhine_ring::prod, RHINE_DES0_GETSIZE, RHINE_DES0_OWN, RHINE_RDES0_RXOK, RHINE_RXDESC_NUM, rhine_nic::rx, and rhine_nic::rx_iobuf.

Referenced by rhine_poll().

rhine_poll()

static void rhine_poll ( struct net_device *  netdev )

static

Poll for completed and received packets.

Parameters

netdev

Network device

Definition at line 589 of file rhine.c.

                                                     {
        struct rhine_nic *rhn = netdev->priv;
        uint8_t isr0;
        uint8_t isr1;

        /* Read and acknowledge interrupts */
        isr0 = readb ( rhn->regs + RHINE_ISR0 );
        isr1 = readb ( rhn->regs + RHINE_ISR1 );
        if ( isr0 )
                writeb ( isr0, rhn->regs + RHINE_ISR0 );
        if ( isr1 )
                writeb ( isr1, rhn->regs + RHINE_ISR1 );

        /* Report unexpected errors */
        if ( ( isr0 & ( RHINE_ISR0_MIBOVFL | RHINE_ISR0_PCIERR |
                        RHINE_ISR0_RXRINGERR | RHINE_ISR0_TXRINGERR ) ) ||
             ( isr1 & ( RHINE_ISR1_GPI | RHINE_ISR1_TXABORT |
                        RHINE_ISR1_RXFIFOOVFL | RHINE_ISR1_RXFIFOUNFL |
                        RHINE_ISR1_TXFIFOUNFL ) ) ) {
                DBGC ( rhn, "RHINE %p unexpected ISR0 %02x ISR1 %02x\n",
                       rhn, isr0, isr1 );
                /* Report as a TX error */
                netdev_tx_err ( netdev, NULL, -EIO );
        }

        /* Poll for TX completions, if applicable */
        if ( isr0 & ( RHINE_ISR0_TXDONE | RHINE_ISR0_TXERR ) )
                rhine_poll_tx ( netdev );

        /* Poll for RX completions, if applicable */
        if ( isr0 & ( RHINE_ISR0_RXDONE | RHINE_ISR0_RXERR ) )
                rhine_poll_rx ( netdev );

        /* Handle RX buffer exhaustion */
        if ( isr1 & RHINE_ISR1_RXNOBUF ) {
                rhine_poll_rx ( netdev );
                netdev_rx_err ( netdev, NULL, -ENOBUFS );
        }

        /* Check link state, if applicable */
        if ( isr1 & RHINE_ISR1_PORTSTATE )
                rhine_check_link ( netdev );

        /* Refill RX ring */
        rhine_refill_rx ( rhn );
}

References DBGC, EIO, ENOBUFS, netdev, netdev_rx_err(), netdev_tx_err(), NULL, net_device::priv, readb(), rhine_nic::regs, rhine_check_link(), RHINE_ISR0, RHINE_ISR0_MIBOVFL, RHINE_ISR0_PCIERR, RHINE_ISR0_RXDONE, RHINE_ISR0_RXERR, RHINE_ISR0_RXRINGERR, RHINE_ISR0_TXDONE, RHINE_ISR0_TXERR, RHINE_ISR0_TXRINGERR, RHINE_ISR1, RHINE_ISR1_GPI, RHINE_ISR1_PORTSTATE, RHINE_ISR1_RXFIFOOVFL, RHINE_ISR1_RXFIFOUNFL, RHINE_ISR1_RXNOBUF, RHINE_ISR1_TXABORT, RHINE_ISR1_TXFIFOUNFL, rhine_poll_rx(), rhine_poll_tx(), rhine_refill_rx(), and writeb().

rhine_irq()

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

static

Enable or disable interrupts.

Parameters

netdev	Network device
enable	Interrupts should be enabled

Definition at line 642 of file rhine.c.

                                                                {
        struct rhine_nic *nic = netdev->priv;

        if ( enable ) {
                /* Enable interrupts */
                writeb ( 0xff, nic->regs + RHINE_IMR0 );
                writeb ( 0xff, nic->regs + RHINE_IMR1 );
        } else {
                /* Disable interrupts */
                writeb ( 0, nic->regs + RHINE_IMR0 );
                writeb ( 0, nic->regs + RHINE_IMR1 );
        }
}

References netdev, net_device::priv, RHINE_IMR0, RHINE_IMR1, and writeb().

rhine_probe()

static int rhine_probe ( struct pci_device *  pci )

static

Probe PCI device.

Parameters

pci	PCI device

Return values

rc	Return status code

Definition at line 678 of file rhine.c.

                                                  {
        struct net_device *netdev;
        struct rhine_nic *rhn;
        uint8_t revision;
        unsigned int i;
        int rc;

        /* Allocate and initialise net device */
        netdev = alloc_etherdev ( sizeof ( *rhn ) );
        if ( ! netdev ) {
                rc = -ENOMEM;
                goto err_alloc;
        }
        netdev_init ( netdev, &rhine_operations );
        rhn = netdev->priv;
        pci_set_drvdata ( pci, netdev );
        netdev->dev = &pci->dev;
        memset ( rhn, 0, sizeof ( *rhn ) );
        rhine_init_ring ( &rhn->tx, RHINE_TXDESC_NUM, RHINE_TXQUEUE_BASE );
        rhine_init_ring ( &rhn->rx, RHINE_RXDESC_NUM, RHINE_RXQUEUE_BASE );

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

        /* Map registers */
        rhn->regs = pci_ioremap ( pci, pci->membase, RHINE_BAR_SIZE );
        rhn->ioaddr = pci->ioaddr;
        DBGC ( rhn, "RHINE %p regs at %08lx, I/O at %04lx\n", rhn,
               pci->membase, pci->ioaddr );

        /* Reset the NIC */
        if ( ( rc = rhine_reset ( rhn ) ) != 0 )
                goto err_reset;

        /* Reload EEPROM */
        if ( ( rc = rhine_reload_eeprom ( rhn ) ) != 0 )
                goto err_reload_eeprom;

        /* Read card revision and enable MMIO */
        pci_read_config_byte ( pci, PCI_REVISION, &revision );
        DBGC ( rhn, "RHINE %p revision %#02x detected\n", rhn, revision );
        rhine_enable_mmio ( rhn, revision );

        /* Read MAC address */
        for ( i = 0 ; i < ETH_ALEN ; i++ )
                netdev->hw_addr[i] = readb ( rhn->regs + RHINE_MAC + i );

        /* Initialise and reset MII interface */
        mdio_init ( &rhn->mdio, &rhine_mii_operations );
        mii_init ( &rhn->mii, &rhn->mdio, 0 );
        if ( ( rc = mii_reset ( &rhn->mii ) ) != 0 ) {
                DBGC ( rhn, "RHINE %p could not reset MII: %s\n",
                       rhn, strerror ( rc ) );
                goto err_mii_reset;
        }
        DBGC ( rhn, "RHINE PHY vendor %04x device %04x\n",
               mii_read ( &rhn->mii, 0x02 ), mii_read ( &rhn->mii, 0x03 ) );

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

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

        return 0;

 err_register_netdev:
 err_mii_reset:
 err_reload_eeprom:
        rhine_reset ( rhn );
 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, ETH_ALEN, net_device::hw_addr, pci_device::ioaddr, rhine_nic::ioaddr, rhine_nic::mdio, mdio_init(), pci_device::membase, memset(), rhine_nic::mii, mii_init(), mii_read(), mii_reset(), netdev, netdev_init(), netdev_nullify(), netdev_put(), pci_ioremap(), pci_read_config_byte(), PCI_REVISION, pci_set_drvdata(), net_device::priv, rc, readb(), register_netdev(), rhine_nic::regs, revision, RHINE_BAR_SIZE, rhine_check_link(), rhine_enable_mmio(), RHINE_MAC, rhine_mii_operations, rhine_operations, rhine_reload_eeprom(), rhine_reset(), RHINE_RXDESC_NUM, RHINE_RXQUEUE_BASE, RHINE_TXDESC_NUM, RHINE_TXQUEUE_BASE, rhine_nic::rx, strerror(), and rhine_nic::tx.

rhine_remove()

static void rhine_remove ( struct pci_device *  pci )

static

Remove PCI device.

Parameters

pci	PCI device

Definition at line 761 of file rhine.c.

                                                    {
        struct net_device *netdev = pci_get_drvdata ( pci );
        struct rhine_nic *nic = netdev->priv;

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

        /* Reset card */
        rhine_reset ( nic );

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

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

Variable Documentation

rhine_mii_operations

struct mii_operations rhine_mii_operations

static

Initial value:

= {
        .read = rhine_mii_read,
        .write = rhine_mii_write,
}

Rhine MII operations.

Definition at line 120 of file rhine.c.

Referenced by rhine_probe().

rhine_operations

struct net_device_operations rhine_operations

static

Initial value:

= {
        .open           = rhine_open,
        .close          = rhine_close,
        .transmit       = rhine_transmit,
        .poll           = rhine_poll,
        .irq            = rhine_irq,
}

Rhine network device operations.

Definition at line 657 of file rhine.c.

Referenced by rhine_probe().

rhine_nics

struct pci_device_id rhine_nics[]

static

Initial value:

= {
        PCI_ROM ( 0x1106, 0x3065, "dlink-530tx", "VIA VT6102", 0 ),
        PCI_ROM ( 0x1106, 0x3106, "vt6105", "VIA VT6105", 0 ),
        PCI_ROM ( 0x1106, 0x3043, "dlink-530tx-old", "VIA VT3043", 0 ),
        PCI_ROM ( 0x1106, 0x3053, "vt6105m", "VIA VT6105M", 0 ),

}

Rhine PCI device IDs.

Definition at line 777 of file rhine.c.

__pci_driver

struct pci_driver rhine_driver __pci_driver

Initial value:

= {
        .ids = rhine_nics,
        .id_count = ( sizeof ( rhine_nics ) / sizeof ( rhine_nics[0] ) ),
        .probe = rhine_probe,
        .remove = rhine_remove,
}

Rhine PCI driver.

Definition at line 786 of file rhine.c.