diff options
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/net/natsemi.c')
| -rw-r--r-- | qemu/roms/ipxe/src/drivers/net/natsemi.c | 934 |
1 files changed, 0 insertions, 934 deletions
diff --git a/qemu/roms/ipxe/src/drivers/net/natsemi.c b/qemu/roms/ipxe/src/drivers/net/natsemi.c deleted file mode 100644 index 9f2c3029c..000000000 --- a/qemu/roms/ipxe/src/drivers/net/natsemi.c +++ /dev/null @@ -1,934 +0,0 @@ -/* - * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#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/nvs.h> -#include <ipxe/bitbash.h> -#include <ipxe/spi_bit.h> -#include <ipxe/threewire.h> -#include "natsemi.h" - -/** @file - * - * National Semiconductor "MacPhyter" network card driver - * - * Based on the following datasheets: - * - * http://www.ti.com/lit/ds/symlink/dp83820.pdf - * http://www.datasheets.org.uk/indexdl/Datasheet-03/DSA0041338.pdf - * - */ - -/****************************************************************************** - * - * EEPROM interface - * - ****************************************************************************** - */ - -/** Pin mapping for SPI bit-bashing interface */ -static const uint8_t natsemi_eeprom_bits[] = { - [SPI_BIT_SCLK] = NATSEMI_MEAR_EECLK, - [SPI_BIT_MOSI] = NATSEMI_MEAR_EEDI, - [SPI_BIT_MISO] = NATSEMI_MEAR_EEDO, - [SPI_BIT_SS(0)] = NATSEMI_MEAR_EESEL, -}; - -/** - * Read input bit - * - * @v basher Bit-bashing interface - * @v bit_id Bit number - * @ret zero Input is a logic 0 - * @ret non-zero Input is a logic 1 - */ -static int natsemi_spi_read_bit ( struct bit_basher *basher, - unsigned int bit_id ) { - struct natsemi_nic *natsemi = container_of ( basher, struct natsemi_nic, - spibit.basher ); - uint32_t mask = natsemi_eeprom_bits[bit_id]; - uint32_t reg; - - DBG_DISABLE ( DBGLVL_IO ); - reg = readl ( natsemi->regs + NATSEMI_MEAR ); - DBG_ENABLE ( DBGLVL_IO ); - return ( reg & mask ); -} - -/** - * Set/clear output bit - * - * @v basher Bit-bashing interface - * @v bit_id Bit number - * @v data Value to write - */ -static void natsemi_spi_write_bit ( struct bit_basher *basher, - unsigned int bit_id, unsigned long data ) { - struct natsemi_nic *natsemi = container_of ( basher, struct natsemi_nic, - spibit.basher ); - uint32_t mask = natsemi_eeprom_bits[bit_id]; - uint32_t reg; - - DBG_DISABLE ( DBGLVL_IO ); - reg = readl ( natsemi->regs + NATSEMI_MEAR ); - reg &= ~mask; - reg |= ( data & mask ); - writel ( reg, natsemi->regs + NATSEMI_MEAR ); - DBG_ENABLE ( DBGLVL_IO ); -} - -/** SPI bit-bashing interface */ -static struct bit_basher_operations natsemi_basher_ops = { - .read = natsemi_spi_read_bit, - .write = natsemi_spi_write_bit, -}; - -/** - * Initialise EEPROM - * - * @v natsemi National Semiconductor device - */ -static void natsemi_init_eeprom ( struct natsemi_nic *natsemi ) { - - /* Initialise SPI bit-bashing interface */ - natsemi->spibit.basher.op = &natsemi_basher_ops; - natsemi->spibit.bus.mode = SPI_MODE_THREEWIRE; - natsemi->spibit.endianness = - ( ( natsemi->flags & NATSEMI_EEPROM_LITTLE_ENDIAN ) ? - SPI_BIT_LITTLE_ENDIAN : SPI_BIT_BIG_ENDIAN ); - init_spi_bit_basher ( &natsemi->spibit ); - - /* Initialise EEPROM device */ - init_at93c06 ( &natsemi->eeprom, 16 ); - natsemi->eeprom.bus = &natsemi->spibit.bus; -} - -/** - * Get hardware address from sane EEPROM data - * - * @v natsemi National Semiconductor device - * @v eeprom EEPROM data - * @v hw_addr Hardware address to fill in - */ -static void natsemi_hwaddr_sane ( struct natsemi_nic *natsemi, - const uint16_t *eeprom, uint16_t *hw_addr ) { - int i; - - /* Copy MAC address from EEPROM data */ - for ( i = ( ( ETH_ALEN / 2 ) - 1 ) ; i >= 0 ; i-- ) - *(hw_addr++) = eeprom[ NATSEMI_EEPROM_MAC_SANE + i ]; - - DBGC ( natsemi, "NATSEMI %p has sane EEPROM layout\n", natsemi ); -} - -/** - * Get hardware address from insane EEPROM data - * - * @v natsemi National Semiconductor device - * @v eeprom EEPROM data - * @v hw_addr Hardware address to fill in - */ -static void natsemi_hwaddr_insane ( struct natsemi_nic *natsemi, - const uint16_t *eeprom, - uint16_t *hw_addr ) { - unsigned int i; - unsigned int offset; - uint16_t word; - - /* Copy MAC address from EEPROM data */ - for ( i = 0 ; i < ( ETH_ALEN / 2 ) ; i++ ) { - offset = ( NATSEMI_EEPROM_MAC_INSANE + i ); - word = ( ( le16_to_cpu ( eeprom[ offset ] ) >> 15 ) | - ( le16_to_cpu ( eeprom[ offset + 1 ] << 1 ) ) ); - hw_addr[i] = cpu_to_le16 ( word ); - } - - DBGC ( natsemi, "NATSEMI %p has insane EEPROM layout\n", natsemi ); -} - -/** - * Get hardware address from EEPROM - * - * @v natsemi National Semiconductor device - * @v hw_addr Hardware address to fill in - * @ret rc Return status code - */ -static int natsemi_hwaddr ( struct natsemi_nic *natsemi, void *hw_addr ) { - uint16_t buf[NATSEMI_EEPROM_SIZE]; - void ( * extract ) ( struct natsemi_nic *natsemi, - const uint16_t *eeprom, uint16_t *hw_addr ); - int rc; - - /* Read EEPROM contents */ - if ( ( rc = nvs_read ( &natsemi->eeprom.nvs, 0, buf, - sizeof ( buf ) ) ) != 0 ) { - DBGC ( natsemi, "NATSEMI %p could not read EEPROM: %s\n", - natsemi, strerror ( rc ) ); - return rc; - } - DBGC2 ( natsemi, "NATSEMI %p EEPROM contents:\n", natsemi ); - DBGC2_HDA ( natsemi, 0, buf, sizeof ( buf ) ); - - /* Extract MAC address from EEPROM contents */ - extract = ( ( natsemi->flags & NATSEMI_EEPROM_INSANE ) ? - natsemi_hwaddr_insane : natsemi_hwaddr_sane ); - extract ( natsemi, buf, hw_addr ); - - return 0; -} - -/****************************************************************************** - * - * Device reset - * - ****************************************************************************** - */ - -/** - * Reset controller chip - * - * @v natsemi National Semiconductor device - * @ret rc Return status code - */ -static int natsemi_soft_reset ( struct natsemi_nic *natsemi ) { - unsigned int i; - - /* Initiate reset */ - writel ( NATSEMI_CR_RST, natsemi->regs + NATSEMI_CR ); - - /* Wait for reset to complete */ - for ( i = 0 ; i < NATSEMI_RESET_MAX_WAIT_MS ; i++ ) { - - /* If reset is not complete, delay 1ms and retry */ - if ( readl ( natsemi->regs + NATSEMI_CR ) & NATSEMI_CR_RST ) { - mdelay ( 1 ); - continue; - } - - return 0; - } - - DBGC ( natsemi, "NATSEMI %p timed out waiting for reset\n", natsemi ); - return -ETIMEDOUT; -} - -/** - * Reload configuration from EEPROM - * - * @v natsemi National Semiconductor device - * @ret rc Return status code - */ -static int natsemi_reload_config ( struct natsemi_nic *natsemi ) { - unsigned int i; - - /* Initiate reload */ - writel ( NATSEMI_PTSCR_EELOAD_EN, natsemi->regs + NATSEMI_PTSCR ); - - /* Wait for reload to complete */ - for ( i = 0 ; i < NATSEMI_EELOAD_MAX_WAIT_MS ; i++ ) { - - /* If reload is not complete, delay 1ms and retry */ - if ( readl ( natsemi->regs + NATSEMI_PTSCR ) & - NATSEMI_PTSCR_EELOAD_EN ) { - mdelay ( 1 ); - continue; - } - - return 0; - } - - DBGC ( natsemi, "NATSEMI %p timed out waiting for configuration " - "reload\n", natsemi ); - return -ETIMEDOUT; -} - -/** - * Reset hardware - * - * @v natsemi National Semiconductor device - * @ret rc Return status code - */ -static int natsemi_reset ( struct natsemi_nic *natsemi ) { - uint32_t cfg; - int rc; - - /* Perform soft reset */ - if ( ( rc = natsemi_soft_reset ( natsemi ) ) != 0 ) - return rc; - - /* Reload configuration from EEPROM */ - if ( ( rc = natsemi_reload_config ( natsemi ) ) != 0 ) - return rc; - - /* Configure 64-bit operation, if applicable */ - cfg = readl ( natsemi->regs + NATSEMI_CFG ); - if ( natsemi->flags & NATSEMI_64BIT ) { - cfg |= ( NATSEMI_CFG_M64ADDR | NATSEMI_CFG_EXTSTS_EN ); - if ( ! ( cfg & NATSEMI_CFG_PCI64_DET ) ) - cfg &= ~NATSEMI_CFG_DATA64_EN; - } - writel ( cfg, natsemi->regs + NATSEMI_CFG ); - - /* Invalidate link status cache to force an update */ - natsemi->cfg = ~cfg; - - DBGC ( natsemi, "NATSEMI %p using configuration %08x\n", - natsemi, cfg ); - return 0; -} - -/****************************************************************************** - * - * Link state - * - ****************************************************************************** - */ - -/** - * Check link state - * - * @v netdev Network device - */ -static void natsemi_check_link ( struct net_device *netdev ) { - struct natsemi_nic *natsemi = netdev->priv; - uint32_t cfg; - - /* Read link status */ - cfg = readl ( natsemi->regs + NATSEMI_CFG ); - - /* Do nothing unless link status has changed */ - if ( cfg == natsemi->cfg ) - return; - - /* Set gigabit mode (if applicable) */ - if ( natsemi->flags & NATSEMI_1000 ) { - cfg &= ~NATSEMI_CFG_MODE_1000; - if ( ! ( cfg & NATSEMI_CFG_SPDSTS1 ) ) - cfg |= NATSEMI_CFG_MODE_1000; - writel ( cfg, natsemi->regs + NATSEMI_CFG ); - } - - /* Update link status */ - natsemi->cfg = cfg; - DBGC ( natsemi, "NATSEMI %p link status is %08x\n", natsemi, cfg ); - - /* Update network device */ - if ( cfg & NATSEMI_CFG_LNKSTS ) { - netdev_link_up ( netdev ); - } else { - netdev_link_down ( netdev ); - } -} - -/****************************************************************************** - * - * Network device interface - * - ****************************************************************************** - */ - -/** - * Set perfect match filter address - * - * @v natsemi National Semiconductor device - * @v mac MAC address - */ -static void natsemi_pmatch ( struct natsemi_nic *natsemi, const void *mac ) { - const uint16_t *pmatch = mac; - uint32_t rfcr; - unsigned int rfaddr; - unsigned int i; - - for ( i = 0 ; i < ETH_ALEN ; i += sizeof ( *pmatch ) ) { - - /* Select receive filter register address */ - rfaddr = ( NATSEMI_RFADDR_PMATCH_BASE + i ); - rfcr = readl ( natsemi->regs + NATSEMI_RFCR ); - rfcr &= ~NATSEMI_RFCR_RFADDR_MASK; - rfcr |= NATSEMI_RFCR_RFADDR ( rfaddr ); - writel ( rfcr, natsemi->regs + NATSEMI_RFCR ); - - /* Write receive filter data */ - writel ( ( le16_to_cpu ( *(pmatch++) ) | NATSEMI_RFDR_BMASK ), - natsemi->regs + NATSEMI_RFDR ); - } -} - -/** - * Create descriptor ring - * - * @v natsemi National Semiconductor device - * @v ring Descriptor ring - * @ret rc Return status code - */ -static int natsemi_create_ring ( struct natsemi_nic *natsemi, - struct natsemi_ring *ring ) { - size_t len = ( ring->count * sizeof ( ring->desc[0] ) ); - union natsemi_descriptor *desc; - union natsemi_descriptor *linked_desc; - physaddr_t address; - physaddr_t link; - size_t offset; - unsigned int i; - int rc; - - /* Calculate descriptor offset */ - offset = ( ( natsemi->flags & NATSEMI_64BIT ) ? 0 : - offsetof ( typeof ( desc[i].d32pad ), d32 ) ); - - /* Allocate descriptor ring. Align ring on its own size to - * ensure that it can't possibly cross the boundary of 32-bit - * address space. - */ - ring->desc = malloc_dma ( len, len ); - if ( ! ring->desc ) { - rc = -ENOMEM; - goto err_alloc; - } - address = ( virt_to_bus ( ring->desc ) + offset ); - - /* Check address is usable by card */ - if ( ! natsemi_address_ok ( natsemi, address ) ) { - DBGC ( natsemi, "NATSEMI %p cannot support 64-bit ring " - "address\n", natsemi ); - rc = -ENOTSUP; - goto err_64bit; - } - - /* Initialise descriptor ring */ - memset ( ring->desc, 0, len ); - for ( i = 0 ; i < ring->count ; i++ ) { - linked_desc = &ring->desc [ ( i + 1 ) % ring->count ]; - link = ( virt_to_bus ( linked_desc ) + offset ); - if ( natsemi->flags & NATSEMI_64BIT ) { - ring->desc[i].d64.link = cpu_to_le64 ( link ); - } else { - ring->desc[i].d32pad.d32.link = cpu_to_le32 ( link ); - } - } - - /* Program ring address */ - writel ( ( address & 0xffffffffUL ), natsemi->regs + ring->reg ); - if ( natsemi->flags & NATSEMI_64BIT ) { - if ( sizeof ( physaddr_t ) > sizeof ( uint32_t ) ) { - writel ( ( ( ( uint64_t ) address ) >> 32 ), - natsemi->regs + ring->reg + 4 ); - } else { - writel ( 0, natsemi->regs + ring->reg + 4 ); - } - } - - DBGC ( natsemi, "NATSEMI %p ring %02x is at [%08llx,%08llx)\n", - natsemi, ring->reg, - ( ( unsigned long long ) virt_to_bus ( ring->desc ) ), - ( ( unsigned long long ) virt_to_bus ( ring->desc ) + len ) ); - - return 0; - - err_64bit: - free_dma ( ring->desc, len ); - ring->desc = NULL; - err_alloc: - return rc; -} - -/** - * Destroy descriptor ring - * - * @v natsemi National Semiconductor device - * @v ring Descriptor ring - */ -static void natsemi_destroy_ring ( struct natsemi_nic *natsemi, - struct natsemi_ring *ring ) { - size_t len = ( ring->count * sizeof ( ring->desc[0] ) ); - - /* Clear ring address */ - writel ( 0, natsemi->regs + ring->reg ); - if ( natsemi->flags & NATSEMI_64BIT ) - writel ( 0, natsemi->regs + ring->reg + 4 ); - - /* Free descriptor ring */ - free_dma ( ring->desc, len ); - ring->desc = NULL; - ring->prod = 0; - ring->cons = 0; -} - -/** - * Refill receive descriptor ring - * - * @v netdev Network device - */ -static void natsemi_refill_rx ( struct net_device *netdev ) { - struct natsemi_nic *natsemi = netdev->priv; - union natsemi_descriptor *rx; - struct io_buffer *iobuf; - unsigned int rx_idx; - physaddr_t address; - - while ( ( natsemi->rx.prod - natsemi->rx.cons ) < NATSEMI_NUM_RX_DESC ){ - - /* Allocate I/O buffer */ - iobuf = alloc_iob ( NATSEMI_RX_MAX_LEN ); - if ( ! iobuf ) { - /* Wait for next refill */ - return; - } - - /* Check address is usable by card */ - address = virt_to_bus ( iobuf->data ); - if ( ! natsemi_address_ok ( natsemi, address ) ) { - DBGC ( natsemi, "NATSEMI %p cannot support 64-bit RX " - "buffer address\n", natsemi ); - netdev_rx_err ( netdev, iobuf, -ENOTSUP ); - return; - } - - /* Get next receive descriptor */ - rx_idx = ( natsemi->rx.prod++ % NATSEMI_NUM_RX_DESC ); - rx = &natsemi->rx.desc[rx_idx]; - - /* Populate receive descriptor */ - if ( natsemi->flags & NATSEMI_64BIT ) { - rx->d64.bufptr = cpu_to_le64 ( address ); - } else { - rx->d32pad.d32.bufptr = cpu_to_le32 ( address ); - } - wmb(); - rx->common.cmdsts = cpu_to_le32 ( NATSEMI_DESC_INTR | - NATSEMI_RX_MAX_LEN ); - wmb(); - - /* Record I/O buffer */ - assert ( natsemi->rx_iobuf[rx_idx] == NULL ); - natsemi->rx_iobuf[rx_idx] = iobuf; - - /* Notify card that there are descriptors available */ - writel ( NATSEMI_CR_RXE, natsemi->regs + NATSEMI_CR ); - - DBGC2 ( natsemi, "NATSEMI %p RX %d is [%llx,%llx)\n", natsemi, - rx_idx, ( ( unsigned long long ) address ), - ( ( unsigned long long ) address + NATSEMI_RX_MAX_LEN)); - } -} - -/** - * Open network device - * - * @v netdev Network device - * @ret rc Return status code - */ -static int natsemi_open ( struct net_device *netdev ) { - struct natsemi_nic *natsemi = netdev->priv; - int rc; - - /* Set MAC address */ - natsemi_pmatch ( natsemi, netdev->ll_addr ); - - /* Create transmit descriptor ring */ - if ( ( rc = natsemi_create_ring ( natsemi, &natsemi->tx ) ) != 0 ) - goto err_create_tx; - - /* Set transmit configuration */ - writel ( ( NATSEMI_TXCFG_CSI | NATSEMI_TXCFG_HBI | NATSEMI_TXCFG_ATP | - NATSEMI_TXCFG_ECRETRY | NATSEMI_TXCFG_MXDMA_DEFAULT | - NATSEMI_TXCFG_FLTH_DEFAULT | NATSEMI_TXCFG_DRTH_DEFAULT ), - ( natsemi->regs + ( ( natsemi->flags & NATSEMI_64BIT ) ? - NATSEMI_TXCFG_64 : NATSEMI_TXCFG_32 ) ) ); - - /* Create receive descriptor ring */ - if ( ( rc = natsemi_create_ring ( natsemi, &natsemi->rx ) ) != 0 ) - goto err_create_rx; - - /* Set receive configuration */ - writel ( ( NATSEMI_RXCFG_ARP | NATSEMI_RXCFG_ATX | NATSEMI_RXCFG_ALP | - NATSEMI_RXCFG_MXDMA_DEFAULT | NATSEMI_RXCFG_DRTH_DEFAULT ), - ( natsemi->regs + ( ( natsemi->flags & NATSEMI_64BIT ) ? - NATSEMI_RXCFG_64 : NATSEMI_RXCFG_32 ) ) ); - - /* Set receive filter configuration */ - writel ( ( NATSEMI_RFCR_RFEN | NATSEMI_RFCR_AAB | NATSEMI_RFCR_AAM | - NATSEMI_RFCR_AAU ), natsemi->regs + NATSEMI_RFCR ); - - /* Fill receive ring */ - natsemi_refill_rx ( netdev ); - - /* Unmask transmit and receive interrupts. (Interrupts will - * not be generated unless enabled via the IER.) - */ - writel ( ( NATSEMI_IRQ_TXDESC | NATSEMI_IRQ_RXDESC ), - natsemi->regs + NATSEMI_IMR ); - - /* Update link state */ - natsemi_check_link ( netdev ); - - return 0; - - natsemi_destroy_ring ( natsemi, &natsemi->rx ); - err_create_rx: - natsemi_destroy_ring ( natsemi, &natsemi->tx ); - err_create_tx: - return rc; -} - -/** - * Close network device - * - * @v netdev Network device - */ -static void natsemi_close ( struct net_device *netdev ) { - struct natsemi_nic *natsemi = netdev->priv; - unsigned int i; - - /* Mask transmit and receive interrupts */ - writel ( 0, natsemi->regs + NATSEMI_IMR ); - - /* Reset and disable transmitter and receiver */ - writel ( ( NATSEMI_CR_RXR | NATSEMI_CR_TXR ), - natsemi->regs + NATSEMI_CR ); - - /* Discard any unused receive buffers */ - for ( i = 0 ; i < NATSEMI_NUM_RX_DESC ; i++ ) { - if ( natsemi->rx_iobuf[i] ) - free_iob ( natsemi->rx_iobuf[i] ); - natsemi->rx_iobuf[i] = NULL; - } - - /* Destroy receive descriptor ring */ - natsemi_destroy_ring ( natsemi, &natsemi->rx ); - - /* Destroy transmit descriptor ring */ - natsemi_destroy_ring ( natsemi, &natsemi->tx ); -} - -/** - * Transmit packet - * - * @v netdev Network device - * @v iobuf I/O buffer - * @ret rc Return status code - */ -static int natsemi_transmit ( struct net_device *netdev, - struct io_buffer *iobuf ) { - struct natsemi_nic *natsemi = netdev->priv; - union natsemi_descriptor *tx; - unsigned int tx_idx; - physaddr_t address; - - /* Check address is usable by card */ - address = virt_to_bus ( iobuf->data ); - if ( ! natsemi_address_ok ( natsemi, address ) ) { - DBGC ( natsemi, "NATSEMI %p cannot support 64-bit TX buffer " - "address\n", natsemi ); - return -ENOTSUP; - } - - /* Get next transmit descriptor */ - if ( ( natsemi->tx.prod - natsemi->tx.cons ) >= NATSEMI_NUM_TX_DESC ) { - DBGC ( natsemi, "NATSEMI %p out of transmit descriptors\n", - natsemi ); - return -ENOBUFS; - } - tx_idx = ( natsemi->tx.prod++ % NATSEMI_NUM_TX_DESC ); - tx = &natsemi->tx.desc[tx_idx]; - - /* Populate transmit descriptor */ - if ( natsemi->flags & NATSEMI_64BIT ) { - tx->d64.bufptr = cpu_to_le64 ( address ); - } else { - tx->d32pad.d32.bufptr = cpu_to_le32 ( address ); - } - wmb(); - tx->common.cmdsts = cpu_to_le32 ( NATSEMI_DESC_OWN | NATSEMI_DESC_INTR | - iob_len ( iobuf ) ); - wmb(); - - /* Notify card that there are packets ready to transmit */ - writel ( NATSEMI_CR_TXE, natsemi->regs + NATSEMI_CR ); - - DBGC2 ( natsemi, "NATSEMI %p TX %d is [%llx,%llx)\n", natsemi, tx_idx, - ( ( unsigned long long ) address ), - ( ( unsigned long long ) address + iob_len ( iobuf ) ) ); - - return 0; -} - -/** - * Poll for completed packets - * - * @v netdev Network device - */ -static void natsemi_poll_tx ( struct net_device *netdev ) { - struct natsemi_nic *natsemi = netdev->priv; - union natsemi_descriptor *tx; - unsigned int tx_idx; - - /* Check for completed packets */ - while ( natsemi->tx.cons != natsemi->tx.prod ) { - - /* Get next transmit descriptor */ - tx_idx = ( natsemi->tx.cons % NATSEMI_NUM_TX_DESC ); - tx = &natsemi->tx.desc[tx_idx]; - - /* Stop if descriptor is still in use */ - if ( tx->common.cmdsts & cpu_to_le32 ( NATSEMI_DESC_OWN ) ) - return; - - /* Complete TX descriptor */ - if ( tx->common.cmdsts & cpu_to_le32 ( NATSEMI_DESC_OK ) ) { - DBGC2 ( natsemi, "NATSEMI %p TX %d complete\n", - natsemi, tx_idx ); - netdev_tx_complete_next ( netdev ); - } else { - DBGC ( natsemi, "NATSEMI %p TX %d completion error " - "(%08x)\n", natsemi, tx_idx, - le32_to_cpu ( tx->common.cmdsts ) ); - netdev_tx_complete_next_err ( netdev, -EIO ); - } - natsemi->tx.cons++; - } -} - -/** - * Poll for received packets - * - * @v netdev Network device - */ -static void natsemi_poll_rx ( struct net_device *netdev ) { - struct natsemi_nic *natsemi = netdev->priv; - union natsemi_descriptor *rx; - struct io_buffer *iobuf; - unsigned int rx_idx; - size_t len; - - /* Check for received packets */ - while ( natsemi->rx.cons != natsemi->rx.prod ) { - - /* Get next receive descriptor */ - rx_idx = ( natsemi->rx.cons % NATSEMI_NUM_RX_DESC ); - rx = &natsemi->rx.desc[rx_idx]; - - /* Stop if descriptor is still in use */ - if ( ! ( rx->common.cmdsts & NATSEMI_DESC_OWN ) ) - return; - - /* Populate I/O buffer */ - iobuf = natsemi->rx_iobuf[rx_idx]; - natsemi->rx_iobuf[rx_idx] = NULL; - len = ( le32_to_cpu ( rx->common.cmdsts ) & - NATSEMI_DESC_SIZE_MASK ); - iob_put ( iobuf, len - 4 /* strip CRC */ ); - - /* Hand off to network stack */ - if ( rx->common.cmdsts & cpu_to_le32 ( NATSEMI_DESC_OK ) ) { - DBGC2 ( natsemi, "NATSEMI %p RX %d complete (length " - "%zd)\n", natsemi, rx_idx, len ); - netdev_rx ( netdev, iobuf ); - } else { - DBGC ( natsemi, "NATSEMI %p RX %d error (length %zd, " - "status %08x)\n", natsemi, rx_idx, len, - le32_to_cpu ( rx->common.cmdsts ) ); - netdev_rx_err ( netdev, iobuf, -EIO ); - } - natsemi->rx.cons++; - } -} - -/** - * Poll for completed and received packets - * - * @v netdev Network device - */ -static void natsemi_poll ( struct net_device *netdev ) { - struct natsemi_nic *natsemi = netdev->priv; - uint32_t isr; - - /* Poll for link state. The PHY interrupt seems not to - * function as expected, and polling for the link state is - * only a single register read. - */ - natsemi_check_link ( netdev ); - - /* Check for and acknowledge interrupts */ - isr = readl ( natsemi->regs + NATSEMI_ISR ); - if ( ! isr ) - return; - - /* Poll for TX completions, if applicable */ - if ( isr & NATSEMI_IRQ_TXDESC ) - natsemi_poll_tx ( netdev ); - - /* Poll for RX completionsm, if applicable */ - if ( isr & NATSEMI_IRQ_RXDESC ) - natsemi_poll_rx ( netdev ); - - /* Refill RX ring */ - natsemi_refill_rx ( netdev ); -} - -/** - * Enable or disable interrupts - * - * @v netdev Network device - * @v enable Interrupts should be enabled - */ -static void natsemi_irq ( struct net_device *netdev, int enable ) { - struct natsemi_nic *natsemi = netdev->priv; - - /* Enable or disable interrupts */ - writel ( ( enable ? NATSEMI_IER_IE : 0 ), natsemi->regs + NATSEMI_IER ); -} - -/** National Semiconductor network device operations */ -static struct net_device_operations natsemi_operations = { - .open = natsemi_open, - .close = natsemi_close, - .transmit = natsemi_transmit, - .poll = natsemi_poll, - .irq = natsemi_irq, -}; - -/****************************************************************************** - * - * PCI interface - * - ****************************************************************************** - */ - -/** - * Probe PCI device - * - * @v pci PCI device - * @ret rc Return status code - */ -static int natsemi_probe ( struct pci_device *pci ) { - struct net_device *netdev; - struct natsemi_nic *natsemi; - int rc; - - /* Allocate and initialise net device */ - netdev = alloc_etherdev ( sizeof ( *natsemi ) ); - if ( ! netdev ) { - rc = -ENOMEM; - goto err_alloc; - } - netdev_init ( netdev, &natsemi_operations ); - natsemi = netdev->priv; - pci_set_drvdata ( pci, netdev ); - netdev->dev = &pci->dev; - memset ( natsemi, 0, sizeof ( *natsemi ) ); - natsemi->flags = pci->id->driver_data; - natsemi_init_ring ( &natsemi->tx, NATSEMI_NUM_TX_DESC, NATSEMI_TXDP ); - natsemi_init_ring ( &natsemi->rx, NATSEMI_NUM_RX_DESC, NATSEMI_RXDP ); - - /* Fix up PCI device */ - adjust_pci_device ( pci ); - - /* Map registers */ - natsemi->regs = ioremap ( pci->membase, NATSEMI_BAR_SIZE ); - if ( ! natsemi->regs ) { - rc = -ENODEV; - goto err_ioremap; - } - - /* Reset the NIC */ - if ( ( rc = natsemi_reset ( natsemi ) ) != 0 ) - goto err_reset; - - /* Initialise EEPROM */ - natsemi_init_eeprom ( natsemi ); - - /* Read initial MAC address */ - if ( ( rc = natsemi_hwaddr ( natsemi, netdev->hw_addr ) ) != 0 ) - goto err_hwaddr; - - /* Register network device */ - if ( ( rc = register_netdev ( netdev ) ) != 0 ) - goto err_register_netdev; - - /* Set initial link state */ - natsemi_check_link ( netdev ); - - return 0; - - unregister_netdev ( netdev ); - err_register_netdev: - err_hwaddr: - natsemi_reset ( natsemi ); - err_reset: - iounmap ( natsemi->regs ); - err_ioremap: - netdev_nullify ( netdev ); - netdev_put ( netdev ); - err_alloc: - return rc; -} - -/** - * Remove PCI device - * - * @v pci PCI device - */ -static void natsemi_remove ( struct pci_device *pci ) { - struct net_device *netdev = pci_get_drvdata ( pci ); - struct natsemi_nic *natsemi = netdev->priv; - - /* Unregister network device */ - unregister_netdev ( netdev ); - - /* Reset card */ - natsemi_reset ( natsemi ); - - /* Free network device */ - iounmap ( natsemi->regs ); - netdev_nullify ( netdev ); - netdev_put ( netdev ); -} - -/** Flags for DP83815 */ -#define DP83815_FLAGS ( NATSEMI_EEPROM_LITTLE_ENDIAN | NATSEMI_EEPROM_INSANE ) - -/** Flags for DP83820 */ -#define DP83820_FLAGS ( NATSEMI_64BIT | NATSEMI_1000 ) - -/** National Semiconductor PCI device IDs */ -static struct pci_device_id natsemi_nics[] = { - PCI_ROM ( 0x100b, 0x0020, "dp83815", "DP83815", DP83815_FLAGS ), - PCI_ROM ( 0x100b, 0x0022, "dp83820", "DP83820", DP83820_FLAGS ), -}; - -/** National Semiconductor PCI driver */ -struct pci_driver natsemi_driver __pci_driver = { - .ids = natsemi_nics, - .id_count = ( sizeof ( natsemi_nics ) / sizeof ( natsemi_nics[0] ) ), - .probe = natsemi_probe, - .remove = natsemi_remove, -}; |