diff options
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/net/pcnet32.c')
| -rw-r--r-- | qemu/roms/ipxe/src/drivers/net/pcnet32.c | 1162 |
1 files changed, 0 insertions, 1162 deletions
diff --git a/qemu/roms/ipxe/src/drivers/net/pcnet32.c b/qemu/roms/ipxe/src/drivers/net/pcnet32.c deleted file mode 100644 index 26633a248..000000000 --- a/qemu/roms/ipxe/src/drivers/net/pcnet32.c +++ /dev/null @@ -1,1162 +0,0 @@ -/* - * Copyright (c) 2010 Andrei Faur <da3drus@gmail.com> - * - * 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 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 <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <assert.h> -#include <byteswap.h> -#include <errno.h> -#include <ipxe/ethernet.h> -#include <ipxe/if_ether.h> -#include <ipxe/io.h> -#include <ipxe/iobuf.h> -#include <ipxe/malloc.h> -#include <ipxe/netdevice.h> -#include <ipxe/pci.h> -#include <ipxe/timer.h> -#include <mii.h> -#include "pcnet32.h" - -static u16 pcnet32_wio_read_csr ( unsigned long addr, int index ) -{ - outw ( index, addr + PCNET32_WIO_RAP ); - return inw ( addr + PCNET32_WIO_RDP ); -} - -static void pcnet32_wio_write_csr ( unsigned long addr, int index, u16 val ) -{ - outw ( index, addr + PCNET32_WIO_RAP ); - outw ( val, addr + PCNET32_WIO_RDP ); -} - -static u16 pcnet32_wio_read_bcr ( unsigned long addr, int index ) -{ - outw ( index, addr + PCNET32_WIO_RAP ); - return inw ( addr + PCNET32_WIO_BDP ); -} - -static void pcnet32_wio_write_bcr ( unsigned long addr, int index, u16 val ) -{ - outw ( index, addr + PCNET32_WIO_RAP ); - outw ( val, addr + PCNET32_WIO_BDP ); -} - -static u16 pcnet32_wio_read_rap ( unsigned long addr ) -{ - return inw ( addr + PCNET32_WIO_RAP ); -} - -static void pcnet32_wio_write_rap ( unsigned long addr , u16 val ) -{ - outw ( val, addr + PCNET32_WIO_RAP ); -} - -static void pcnet32_wio_reset ( unsigned long addr ) -{ - inw ( addr + PCNET32_WIO_RESET ); -} - -static int pcnet32_wio_check ( unsigned long addr ) -{ - outw ( 88, addr + PCNET32_WIO_RAP ); - return ( inw ( addr + PCNET32_WIO_RAP ) == 88 ); -} - -static struct pcnet32_access pcnet32_wio = { - .read_csr = pcnet32_wio_read_csr, - .write_csr = pcnet32_wio_write_csr, - .read_bcr = pcnet32_wio_read_bcr, - .write_bcr = pcnet32_wio_write_bcr, - .read_rap = pcnet32_wio_read_rap, - .write_rap = pcnet32_wio_write_rap, - .reset = pcnet32_wio_reset, -}; - -static u16 pcnet32_dwio_read_csr ( unsigned long addr, int index ) -{ - outl ( index, addr + PCNET32_DWIO_RAP ); - return ( inl ( addr + PCNET32_DWIO_RDP ) & 0xffff ); -} - -static void pcnet32_dwio_write_csr ( unsigned long addr, int index, u16 val ) -{ - outl ( index, addr + PCNET32_DWIO_RAP ); - outl ( val, addr + PCNET32_DWIO_RDP ); -} - -static u16 pcnet32_dwio_read_bcr ( unsigned long addr, int index ) -{ - outl ( index, addr + PCNET32_DWIO_RAP ); - return ( inl ( addr + PCNET32_DWIO_BDP ) & 0xffff ); -} - -static void pcnet32_dwio_write_bcr ( unsigned long addr, int index, u16 val ) -{ - outl ( index, addr + PCNET32_DWIO_RAP ); - outl ( val, addr + PCNET32_DWIO_BDP ); -} - -static u16 pcnet32_dwio_read_rap ( unsigned long addr ) -{ - return ( inl ( addr + PCNET32_DWIO_RAP ) & 0xffff ); -} - -static void pcnet32_dwio_write_rap ( unsigned long addr , u16 val ) -{ - outl ( val, addr + PCNET32_DWIO_RAP ); -} - -static void pcnet32_dwio_reset ( unsigned long addr ) -{ - inl ( addr + PCNET32_DWIO_RESET ); -} - -static int pcnet32_dwio_check ( unsigned long addr ) -{ - outl ( 88, addr + PCNET32_DWIO_RAP ); - return ( ( inl ( addr + PCNET32_DWIO_RAP ) & 0xffff ) == 88 ); -} - - -static struct pcnet32_access pcnet32_dwio = { - .read_csr = pcnet32_dwio_read_csr, - .write_csr = pcnet32_dwio_write_csr, - .read_bcr = pcnet32_dwio_read_bcr, - .write_bcr = pcnet32_dwio_write_bcr, - .read_rap = pcnet32_dwio_read_rap, - .write_rap = pcnet32_dwio_write_rap, - .reset = pcnet32_dwio_reset, -}; - -static int -pcnet32_mdio_read ( struct net_device *netdev, int phy, int reg ) -{ - struct pcnet32_private *priv = netdev->priv; - unsigned long ioaddr = priv->pci_dev->ioaddr; - u16 val_out; - - if ( ! priv->mii ) - return 0; - - /* First, select PHY chip and the register we want to read */ - priv->a->write_bcr ( ioaddr, 33, - ( ( phy & 0x1f ) << 5 ) | ( reg & 0x1f ) ); - - /* Read the selected register's value */ - val_out = priv->a->read_bcr ( ioaddr, 34 ); - - return val_out; -} - -static void -__unused pcnet32_mdio_write ( struct net_device *netdev, int phy, int reg, int val ) -{ - struct pcnet32_private *priv = netdev->priv; - unsigned long ioaddr = priv->pci_dev->ioaddr; - - if ( ! priv->mii ) - return; - - /* First, select PHY chip and the register we want to write to */ - priv->a->write_bcr ( ioaddr, 33, - ( ( phy & 0x1f ) << 5 ) | ( reg & 0x1f ) ); - - /* Write val to the selected register */ - priv->a->write_bcr ( ioaddr, 34, val ); -} - - -/** - * pcnet32_refill_rx_ring - Allocates iobufs for every Rx descriptor - * that doesn't have one and isn't in use by the hardware - * - * @v priv Driver private structure - */ -static void -pcnet32_refill_rx_ring ( struct pcnet32_private *priv ) -{ - struct pcnet32_rx_desc *rx_curr_desc; - u16 status; - int i; - - DBGP ( "pcnet32_refill_rx_ring\n" ); - - for ( i = 0; i < RX_RING_SIZE; i++ ) { - rx_curr_desc = priv->rx_base + i; - - status = le16_to_cpu ( rx_curr_desc->status ); - - /* Don't touch descriptors owned by the hardware */ - if ( status & DescOwn ) - continue; - - /* Descriptors with iobufs still need to be processed */ - if ( priv->rx_iobuf[i] != NULL ) - continue; - - /* If alloc_iob fails, try again later (next poll) */ - if ( ! ( priv->rx_iobuf[i] = alloc_iob ( PKT_BUF_SIZE ) ) ) { - DBG ( "Refill rx ring failed\n" ); - break; - } - - rx_curr_desc->base = - cpu_to_le32 ( virt_to_bus ( priv->rx_iobuf[i]->data ) ); - rx_curr_desc->buf_length = cpu_to_le16 ( -PKT_BUF_SIZE ); - rx_curr_desc->msg_length = rx_curr_desc->reserved = 0; - - /* Owner changes after the other status fields are set */ - wmb(); - rx_curr_desc->status = cpu_to_le16 ( DescOwn ); - } - -} - -/** - * pcnet32_setup_rx_resources - allocate Rx resources (Descriptors) - * - * @v priv Driver private structure - * - * @ret rc Returns 0 on success, negative on failure - */ -static int -pcnet32_setup_rx_resources ( struct pcnet32_private *priv ) -{ - DBGP ( "pcnet32_setup_rx_resources\n" ); - - priv->rx_base = malloc_dma ( RX_RING_BYTES, RX_RING_ALIGN ); - - DBG ( "priv->rx_base = %#08lx\n", virt_to_bus ( priv->rx_base ) ); - - if ( ! priv->rx_base ) { - return -ENOMEM; - } - - memset ( priv->rx_base, 0, RX_RING_BYTES ); - - pcnet32_refill_rx_ring ( priv ); - - priv->rx_curr = 0; - - return 0; -} - -static void -pcnet32_free_rx_resources ( struct pcnet32_private *priv ) -{ - int i; - - DBGP ( "pcnet32_free_rx_resources\n" ); - - free_dma ( priv->rx_base, RX_RING_BYTES ); - - for ( i = 0; i < RX_RING_SIZE; i++ ) { - free_iob ( priv->rx_iobuf[i] ); - priv->rx_iobuf[i] = NULL; - } -} - -/** - * pcnet32_setup_tx_resources - allocate Tx resources (Descriptors) - * - * @v priv Driver private structure - * - * @ret rc Returns 0 on success, negative on failure - */ -static int -pcnet32_setup_tx_resources ( struct pcnet32_private *priv ) -{ - DBGP ( "pcnet32_setup_tx_resources\n" ); - - priv->tx_base = malloc_dma ( TX_RING_BYTES, TX_RING_ALIGN ); - - if ( ! priv->tx_base ) { - return -ENOMEM; - } - - memset ( priv->tx_base, 0, TX_RING_BYTES ); - - DBG ( "priv->tx_base = %#08lx\n", virt_to_bus ( priv->tx_base ) ); - - priv->tx_curr = 0; - priv->tx_fill_ctr = 0; - priv->tx_tail = 0; - - return 0; -} - -static void -pcnet32_free_tx_resources ( struct pcnet32_private *priv ) -{ - DBGP ( "pcnet32_free_tx_resources\n" ); - - free_dma ( priv->tx_base, TX_RING_BYTES ); -} - -static int -pcnet32_chip_detect ( struct pcnet32_private *priv ) -{ - int fdx, mii, fset; - int media; - int rc; - unsigned long ioaddr; - struct pcnet32_access *a; - int chip_version; - char *chipname; - - ioaddr = priv->pci_dev->ioaddr; - a = priv->a; - - chip_version = a->read_csr ( ioaddr, 88 ) - | ( a->read_csr ( ioaddr, 89 ) << 16 ); - - rc = -ENODEV; - - DBG ( "PCnet chip version is 0x%X\n", chip_version ); - if ( ( chip_version & 0xfff ) != 0x003 ) - goto err_unsupported; - - fdx = mii = fset = 0; - chip_version = ( chip_version >> 12 ) & 0xffff; - - switch (chip_version) { - case 0x2420: - chipname = "PCnet/PCI 79C970"; - break; - case 0x2430: - /* 970 gives the wrong chip id back */ - chipname = "PCnet/PCI 79C970"; - break; - case 0x2621: - chipname = "PCnet/PCI II 79C970A"; - fdx = 1; - break; - case 0x2623: - chipname = "PCnet/FAST 79C971"; - fdx = 1; - mii = 1; - fset = 1; - break; - case 0x2624: - chipname = "PCnet/FAST+ 79C972"; - fdx = 1; - mii = 1; - fset = 1; - break; - case 0x2625: - chipname = "PCnet/FAST III 79C973"; - fdx = 1; - mii = 1; - break; - case 0x2626: - chipname = "PCnet/Home 79C978"; - fdx = 1; - /* - * This is based on specs published at www.amd.com. This section - * assumes that a NIC with a 79C978 wants to go into 1Mb HomePNA - * mode. The 79C978 can also go into standard ethernet, and - * there probably should be some sort of module option to select - * the mode by which the card should operate - */ - /* switch to home wiring mode */ - media = a->read_bcr(ioaddr, 49); - - DBG ( "media reset to %#x.\n", media ); - a->write_bcr(ioaddr, 49, media); - break; - case 0x2627: - chipname = "PCnet/FAST III 79C975"; - fdx = 1; - mii = 1; - break; - case 0x2628: - chipname = "PCnet/PRO 79C976"; - fdx = 1; - mii = 1; - break; - default: - chipname = "UNKNOWN"; - DBG ( "PCnet version %#x, no PCnet32 chip.\n", chip_version ); - goto err_unsupported; - } - - DBG ( "PCnet chipname %s\n", chipname ); - - /* - * On selected chips turn on the BCR18:NOUFLO bit. This stops transmit - * starting until the packet is loaded. Strike one for reliability, lose - * one for latency - although on PCI this isn't a big loss. Older chips - * have FIFO's smaller than a packet, so you can't do this. - * Turn on BCR18:BurstRdEn and BCR18:BurstWrEn. - */ - if (fset) { - a->write_bcr ( ioaddr, 18, - ( a->read_bcr ( ioaddr, 18 ) | 0x0860 ) ); - a->write_csr ( ioaddr, 80, - ( a->read_csr ( ioaddr, 80 ) & 0x0C00) | 0x0C00 ); - } - - priv->full_duplex = fdx; - priv->mii = mii; - - return 0; - -err_unsupported: - return rc; -} - -/** - * pcnet32_set_ops - Determines the ops used to access the registers - * - * @v priv Driver private structure - * - * @ret rc Returns 0 on success, negative on failure - */ -static int -pcnet32_set_ops ( struct pcnet32_private *priv ) -{ - int rc; - unsigned long ioaddr; - - ioaddr = priv->pci_dev->ioaddr; - - /* Check if CSR0 has its default value and perform a write / read - in the RAP register to see if it works. Based on these results - determine what mode the NIC is in (WIO / DWIO) - */ - rc = -ENODEV; - - if ( pcnet32_wio_read_csr ( ioaddr, 0 ) == 4 && - pcnet32_wio_check ( ioaddr ) ) { - priv->a = &pcnet32_wio; - } else { - pcnet32_dwio_reset ( ioaddr ); - if ( pcnet32_dwio_read_csr ( ioaddr, 0 ) == 4 && - pcnet32_dwio_check ( ioaddr ) ) { - priv->a = &pcnet32_dwio; - } else { - goto err_unsupported; - } - } - - return 0; - -err_unsupported: - return rc; -} - -/** - * pcnet32_setup_init_block - setup the NICs initialization block - * - * @v priv Driver private structure - * - * @ret rc Returns 0 on success, negative on failure - */ -static void -pcnet32_setup_init_block ( struct pcnet32_private *priv ) -{ - int i; - - /* Configure the network port based on what we've established so far */ - priv->init_block.mode = - cpu_to_le16 ( ( priv->options & PCNET32_PORT_PORTSEL ) << 7 ); - - /* Setup RLEN and TLEN fields */ - priv->init_block.tlen_rlen = - cpu_to_le16 ( ( PCNET32_LOG_RX_BUFFERS << 4 ) | - ( PCNET32_LOG_TX_BUFFERS << 12 ) ); - - /* Fill in physical address */ - for ( i = 0; i < ETH_ALEN; i++) - priv->init_block.phys_addr[i] = priv->netdev->hw_addr[i]; - - /* No multicasting scheme, accept everything */ - priv->init_block.filter[0] = 0xffffffff; - priv->init_block.filter[1] = 0xffffffff; - - priv->init_block.rx_ring = - cpu_to_le32 ( virt_to_bus ( priv->rx_base ) ); - priv->init_block.tx_ring = - cpu_to_le32 ( virt_to_bus ( priv->tx_base ) ); - - /* Make sure all changes are visible */ - wmb(); -} - -/** - * pcnet32_setup_probe_phy - go through all PHYs and see which one is present - * - * @v priv Driver private structure - */ -static void -pcnet32_setup_probe_phy ( struct pcnet32_private *priv ) -{ - unsigned long ioaddr = priv->pci_dev->ioaddr; - unsigned int phycount = 0; - int phy_id; - int i; - - if ( priv->mii ) { - phy_id = ( ( priv->a->read_bcr ( ioaddr, 33 ) ) >> 5 ) & 0x1f; - for ( i = 0; i < PCNET32_MAX_PHYS; i++ ) { - unsigned short id1, id2; - id1 = pcnet32_mdio_read ( priv->netdev, i, MII_PHYSID1 ); - if ( id1 == 0xffff ) - continue; - id2 = pcnet32_mdio_read ( priv->netdev, i, MII_PHYSID2 ); - if ( id2 == 0xffff ) - continue; - if ( i == 31 && ( ( priv->chip_version + 1 ) & 0xfffe ) == 0x2624 ) - continue; - - phycount++; - phy_id = i; - } - priv->a->write_bcr ( ioaddr, 33, phy_id << 5 ); - if ( phycount > 1 ) - priv->options |= PCNET32_PORT_MII; - } -} - -/** - * pcnet32_setup_mac_addr - check for inconsistency between CSR12-14 - * and PROM addresses - * - * @v priv Driver private structure - */ -static int -pcnet32_setup_mac_addr ( struct pcnet32_private *priv ) -{ - int i; - u8 promaddr[ETH_ALEN]; - unsigned long ioaddr = priv->pci_dev->ioaddr; - - /* In most chips, after a chip reset, the ethernet address is read from - * the station address PROM at the base address and programmed into the - * "Physical Address Registers" CSR12-14. - * As a precautionary measure, we read the PROM values and complain if - * they disagree with the CSRs. If they miscompare, and the PROM addr - * is valid, then the PROM addr is used. - */ - for ( i = 0; i < 3; i++ ) { - unsigned int val; - val = priv->a->read_csr ( ioaddr, i + 12 ) & 0x0ffff; - /* There may be endianness issues here. */ - priv->netdev->hw_addr[2 * i] = val & 0x0ff; - priv->netdev->hw_addr[2 * i + 1] = ( val >> 8 ) & 0x0ff; - } - - for ( i = 0; i < ETH_ALEN; i++ ) - promaddr[i] = inb ( ioaddr + i ); - - if ( memcmp ( promaddr, priv->netdev->hw_addr, ETH_ALEN ) || - ! is_valid_ether_addr ( priv->netdev->hw_addr ) ) { - if ( is_valid_ether_addr ( promaddr ) ) { - DBG ( "CSR address is invalid, using PROM addr\n" ); - memcpy ( priv->netdev->hw_addr, promaddr, ETH_ALEN ); - } - } - - /* If ethernet address is not valid, return error */ - if ( ! is_valid_ether_addr ( priv->netdev->hw_addr ) ) - return -EADDRNOTAVAIL; - - return 0; -} - -/** - * pcnet32_setup_if_duplex - Sets the NICs used interface and duplex mode - * - * @v priv Driver private structure - */ -static void -pcnet32_setup_if_duplex ( struct pcnet32_private *priv ) -{ - unsigned long ioaddr = priv->pci_dev->ioaddr; - u16 val; - - /* Set/Reset autoselect bit */ - val = priv->a->read_bcr ( ioaddr, 2 ) & ~2; - if ( priv->options & PCNET32_PORT_ASEL ) - val |= 2; - priv->a->write_bcr ( ioaddr, 2, val ); - - /* Handle full duplex setting */ - if ( priv->full_duplex ) { - val = priv->a->read_bcr ( ioaddr, 9 ) & ~3; - if ( priv->options & PCNET32_PORT_FD ) { - val |= 1; - if ( priv->options == ( PCNET32_PORT_FD | PCNET32_PORT_AUI ) ) - val |= 2; - } else if ( priv->options & PCNET32_PORT_ASEL ) { - /* Workaround of xSeries 250, on for 79C975 only */ - if ( priv->chip_version == 0x2627 ) - val |= 3; - } - priv->a->write_bcr ( ioaddr, 9, val ); - } - - /* Set/Reset GPSI bit in test register */ - val = priv->a->read_csr ( ioaddr, 124 ) & ~0x10; - if ( ( priv->options & PCNET32_PORT_PORTSEL ) == PCNET32_PORT_GPSI ) - val |= 0x10; - priv->a->write_bcr ( ioaddr, 124, val ); - - /* Allied Telesyn AT are 100Mbit only and do not negotiate */ - u16 subsys_vend_id, subsys_dev_id; - pci_read_config_word ( priv->pci_dev, - PCI_SUBSYSTEM_VENDOR_ID, - &subsys_vend_id ); - pci_read_config_word ( priv->pci_dev, - PCI_SUBSYSTEM_ID, - &subsys_dev_id ); - if ( subsys_vend_id == PCI_VENDOR_ID_AT && - ( ( subsys_dev_id == PCI_SUBDEVICE_ID_AT_2700FX ) || - ( subsys_dev_id == PCI_SUBDEVICE_ID_AT_2701FX ) ) ) { - priv->options = PCNET32_PORT_FD | PCNET32_PORT_100; - } - - if ( priv->mii && ! ( priv->options & PCNET32_PORT_ASEL ) ) { - /* Disable Auto Negotiation, set 10Mbps, HD */ - val = priv->a->read_bcr ( ioaddr, 32 ) & ~0x38; - if ( priv->options & PCNET32_PORT_FD ) - val |= 0x10; - if ( priv->options & PCNET32_PORT_100 ) - val |= 0x08; - priv->a->write_bcr ( ioaddr, 32, val ); - } else if ( priv->options & PCNET32_PORT_ASEL ) { - /* 79C970 chips do not have the BCR32 register */ - if ( ( priv->chip_version != 0x2420 ) && - ( priv->chip_version != 0x2621 ) ) { - /* Enable Auto Negotiation, setup, disable FD */ - val = priv->a->read_bcr ( ioaddr, 32 ) & ~0x98; - val |= 0x20; - priv->a->write_bcr ( ioaddr, 32, val ); - } - } -} - -/** - * pcnet32_hw_start - Starts up the NIC - * - * @v priv Driver private structure - */ -static void -pcnet32_hw_start ( struct pcnet32_private *priv ) -{ - unsigned long ioaddr = priv->pci_dev->ioaddr; - int i; - - /* Begin initialization procedure */ - priv->a->write_csr ( ioaddr, 0, Init ); - - /* Wait for the initialization to be done */ - i = 0; - while ( i++ < 100 ) - if ( priv->a->read_csr ( ioaddr, 0 ) & InitDone ) - break; - - /* Start the chip */ - priv->a->write_csr ( ioaddr, 0, Strt ); -} - -/** - * open - Called when a network interface is made active - * - * @v netdev Network device - * @ret rc Return status code, 0 on success, negative value on failure - **/ -static int -pcnet32_open ( struct net_device *netdev ) -{ - struct pcnet32_private *priv = netdev_priv ( netdev ); - unsigned long ioaddr = priv->pci_dev->ioaddr; - int rc; - u16 val; - - /* Setup TX and RX descriptors */ - if ( ( rc = pcnet32_setup_tx_resources ( priv ) ) != 0 ) { - DBG ( "Error setting up TX resources\n" ); - goto err_setup_tx; - } - - if ( ( rc = pcnet32_setup_rx_resources ( priv ) ) != 0 ) { - DBG ( "Error setting up RX resources\n" ); - goto err_setup_rx; - } - - /* Reset the chip */ - priv->a->reset ( ioaddr ); - - /* Switch pcnet32 to 32bit mode */ - priv->a->write_bcr ( ioaddr, 20, PCNET32_SWSTYLE_PCNET32 ); - - /* Setup the interface and duplex mode */ - pcnet32_setup_if_duplex ( priv ); - - /* Disable interrupts */ - val = priv->a->read_csr ( ioaddr, 3 ); - val |= BablMask | MissFrameMask | RxIntMask | TxIntMask | InitDoneMask; - priv->a->write_csr ( ioaddr, 3, val ); - - /* Setup initialization block */ - pcnet32_setup_init_block ( priv ); - - /* Fill in the address of the initialization block */ - priv->a->write_csr ( ioaddr, 1, - ( virt_to_bus ( &priv->init_block ) ) & 0xffff ); - priv->a->write_csr ( ioaddr, 2, - ( virt_to_bus ( &priv->init_block ) ) >> 16 ); - - /* Enable Auto-Pad, disable interrupts */ - priv->a->write_csr ( ioaddr, 4, 0x0915 ); - - pcnet32_hw_start ( priv ); - - return 0; - -err_setup_rx: - pcnet32_free_tx_resources ( priv ); -err_setup_tx: - priv->a->reset( priv->pci_dev->ioaddr ); - return rc; -} - -/** - * transmit - Transmit a packet - * - * @v netdev Network device - * @v iobuf I/O buffer - * - * @ret rc Returns 0 on success, negative on failure - */ -static int -pcnet32_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) -{ - struct pcnet32_private *priv = netdev_priv ( netdev ); - unsigned long ioaddr = priv->pci_dev->ioaddr; - uint32_t tx_len = iob_len ( iobuf ); - struct pcnet32_tx_desc *tx_curr_desc; - - DBGP ( "pcnet32_transmit\n" ); - - if ( priv->tx_fill_ctr == TX_RING_SIZE ) { - DBG ( "Tx overflow\n" ); - return -ENOTSUP; - } - - priv->tx_iobuf[priv->tx_curr] = iobuf; - - tx_curr_desc = priv->tx_base + priv->tx_curr; - - /* Configure current descriptor to transmit packet */ - tx_curr_desc->length = cpu_to_le16 ( -tx_len ); - tx_curr_desc->misc = 0x00000000; - tx_curr_desc->base = cpu_to_le32 ( virt_to_bus ( iobuf->data ) ); - - /* Owner changes after the other status fields are set */ - wmb(); - tx_curr_desc->status = - cpu_to_le16 ( DescOwn | StartOfPacket | EndOfPacket ); - - /* Trigger an immediate send poll */ - priv->a->write_csr ( ioaddr, 0, - ( priv->irq_enabled ? IntEnable : 0 ) | TxDemand ); - - /* Point to the next free descriptor */ - priv->tx_curr = ( priv->tx_curr + 1 ) % TX_RING_SIZE; - - /* Increment number of tx descriptors in use */ - priv->tx_fill_ctr++; - - return 0; -} - -/** - * pcnet32_process_tx_packets - Checks for successfully sent packets, - * reports them to iPXE with netdev_tx_complete() - * - * @v netdev Network device - */ -static void -pcnet32_process_tx_packets ( struct net_device *netdev ) -{ - struct pcnet32_private *priv = netdev_priv ( netdev ); - struct pcnet32_tx_desc *tx_curr_desc; - - DBGP ( "pcnet32_process_tx_packets\n" ); - - while ( priv->tx_tail != priv->tx_curr ) { - tx_curr_desc = priv->tx_base + priv->tx_tail; - - u16 status = le16_to_cpu ( tx_curr_desc->status ); - - DBG ( "Before OWN bit check, status: %#08x\n", status ); - - /* Skip this descriptor if hardware still owns it */ - if ( status & DescOwn ) - break; - - DBG ( "Transmitted packet.\n" ); - DBG ( "priv->tx_fill_ctr= %d\n", priv->tx_fill_ctr ); - DBG ( "priv->tx_tail = %d\n", priv->tx_tail ); - DBG ( "priv->tx_curr = %d\n", priv->tx_curr ); - DBG ( "tx_curr_desc = %#08lx\n", virt_to_bus ( tx_curr_desc ) ); - - /* This packet is ready for completion */ - netdev_tx_complete ( netdev, priv->tx_iobuf[priv->tx_tail]); - - /* Clear the descriptor */ - memset ( tx_curr_desc, 0, sizeof(*tx_curr_desc) ); - - /* Reduce the number of tx descriptors in use */ - priv->tx_fill_ctr--; - - /* Go to next available descriptor */ - priv->tx_tail = ( priv->tx_tail + 1 ) % TX_RING_SIZE; - } -} - -/** - * pcnet32_process_rx_packets - Checks for received packets, reports them - * to iPXE with netdev_rx() or netdev_rx_err() if there was an error receiving - * the packet - * - * @v netdev Network device - */ -static void -pcnet32_process_rx_packets ( struct net_device *netdev ) -{ - struct pcnet32_private *priv = netdev_priv ( netdev ); - struct pcnet32_rx_desc *rx_curr_desc; - u16 status; - u32 len; - int i; - - DBGP ( "pcnet32_process_rx_packets\n" ); - - for ( i = 0; i < RX_RING_SIZE; i++ ) { - rx_curr_desc = priv->rx_base + priv->rx_curr; - - status = le16_to_cpu ( rx_curr_desc->status ); - rmb(); - - DBG ( "Before OWN bit check, status: %#08x\n", status ); - - /* Skip this descriptor if hardware still owns it */ - if ( status & DescOwn ) - break; - - /* We own the descriptor, but it has not been refilled yet */ - if ( priv->rx_iobuf[priv->rx_curr] == NULL ) - break; - - DBG ( "Received packet.\n" ); - DBG ( "priv->rx_curr = %d\n", priv->rx_curr ); - DBG ( "rx_len = %d\n", - ( le32_to_cpu ( rx_curr_desc->msg_length ) & 0xfff ) - 4 ); - DBG ( "rx_curr_desc = %#08lx\n", - virt_to_bus ( rx_curr_desc ) ); - - /* Check ERR bit */ - if ( status & 0x4000 ) { - netdev_rx_err ( netdev, priv->rx_iobuf[priv->rx_curr], - -EINVAL ); - DBG ( "Corrupted packet received!\n"); - } else { - /* Adjust size of the iobuf to reflect received data */ - len = ( le32_to_cpu ( rx_curr_desc->msg_length ) & 0xfff ) - 4; - iob_put ( priv->rx_iobuf[priv->rx_curr], len ); - - /* Add this packet to the receive queue */ - netdev_rx ( netdev, priv->rx_iobuf[priv->rx_curr] ); - } - - /* Invalidate iobuf and descriptor */ - priv->rx_iobuf[priv->rx_curr] = NULL; - memset ( rx_curr_desc, 0, sizeof(*rx_curr_desc) ); - - /* Point to the next free descriptor */ - priv->rx_curr = ( priv->rx_curr + 1 ) % RX_RING_SIZE; - } - - /* Allocate new iobufs where needed */ - pcnet32_refill_rx_ring ( priv ); -} - -/** - * poll - Poll for received packets - * - * @v netdev Network device - */ -static void -pcnet32_poll ( struct net_device *netdev ) -{ - struct pcnet32_private *priv = netdev_priv ( netdev ); - unsigned long ioaddr = priv->pci_dev->ioaddr; - u16 status; - - DBGP ( "pcnet32_poll\n" ); - - status = priv->a->read_csr ( ioaddr, 0 ); - - /* Clear interrupts */ - priv->a->write_csr ( ioaddr, 0, status ); - - DBG ( "pcnet32_poll: mask = %#04x, status = %#04x\n", - priv->a->read_csr ( ioaddr, 3 ), status ); - - /* Return when RINT or TINT are not set */ - if ( ( status & 0x0500 ) == 0x0000 ) - return; - - /* Process transmitted packets */ - pcnet32_process_tx_packets ( netdev ); - - /* Process received packets */ - pcnet32_process_rx_packets ( netdev ); -} - -/** - * close - Disable network interface - * - * @v netdev network interface device structure - **/ -static void -pcnet32_close ( struct net_device *netdev ) -{ - struct pcnet32_private *priv = netdev_priv ( netdev ); - unsigned long ioaddr = priv->pci_dev->ioaddr; - - DBGP ( "pcnet32_close\n" ); - - /* Reset the chip */ - pcnet32_wio_reset ( ioaddr ); - - /* Stop the PCNET32 - it occasionally polls memory if we don't */ - priv->a->write_csr ( ioaddr, 0, Stop ); - - /* Switch back to 16bit mode to avoid problems with dumb - * DOS packet driver after a warm reboot */ - priv->a->write_bcr ( ioaddr, 20, PCNET32_SWSTYLE_LANCE ); - - pcnet32_free_rx_resources ( priv ); - pcnet32_free_tx_resources ( priv ); -} - -static void pcnet32_irq_enable ( struct pcnet32_private *priv ) -{ - unsigned long ioaddr = priv->pci_dev->ioaddr; - u16 val; - - DBGP ( "pcnet32_irq_enable\n" ); - - /* Enable TINT and RINT masks */ - val = priv->a->read_csr ( ioaddr, 3 ); - val &= ~( RxIntMask | TxIntMask ); - priv->a->write_csr ( ioaddr, 3, val ); - - /* Enable interrupts */ - priv->a->write_csr ( ioaddr, 0, IntEnable ); - - priv->irq_enabled = 1; -} - -static void pcnet32_irq_disable ( struct pcnet32_private *priv ) -{ - unsigned long ioaddr = priv->pci_dev->ioaddr; - - DBGP ( "pcnet32_irq_disable\n" ); - - priv->a->write_csr ( ioaddr, 0, 0x0000 ); - - priv->irq_enabled = 0; -} - -/** - * irq - enable or disable interrupts - * - * @v netdev network adapter - * @v action requested interrupt action - **/ -static void -pcnet32_irq ( struct net_device *netdev, int action ) -{ - struct pcnet32_private *priv = netdev_priv ( netdev ); - - DBGP ( "pcnet32_irq\n" ); - - switch ( action ) { - case 0: - pcnet32_irq_disable ( priv ); - break; - default: - pcnet32_irq_enable ( priv ); - break; - } -} - -static struct net_device_operations pcnet32_operations = { - .open = pcnet32_open, - .transmit = pcnet32_transmit, - .poll = pcnet32_poll, - .close = pcnet32_close, - .irq = pcnet32_irq, -}; - -/** - * probe - Initial configuration of NIC - * - * @v pdev PCI device - * @v ent PCI IDs - * - * @ret rc Return status code - **/ -static int -pcnet32_probe ( struct pci_device *pdev ) -{ - struct net_device *netdev; - struct pcnet32_private *priv; - unsigned long ioaddr; - int rc; - - DBGP ( "pcnet32_probe\n" ); - - DBG ( "Found %s, vendor = %#04x, device = %#04x\n", - pdev->id->name, pdev->id->vendor, pdev->id->device ); - - /* Allocate our private data */ - netdev = alloc_etherdev ( sizeof ( *priv ) ); - if ( ! netdev ) { - rc = -ENOMEM; - goto err_alloc_etherdev; - } - - /* Link our operations to the netdev struct */ - netdev_init ( netdev, &pcnet32_operations ); - - /* Link the PCI device to the netdev struct */ - pci_set_drvdata ( pdev, netdev ); - netdev->dev = &pdev->dev; - - /* Get a reference to our private data */ - priv = netdev_priv ( netdev ); - - /* We'll need these set up for the rest of the routines */ - priv->pci_dev = pdev; - priv->netdev = netdev; - - ioaddr = pdev->ioaddr; - - /* Only use irqs under UNDI */ - priv->irq_enabled = 0; - - /* Reset the chip */ - pcnet32_wio_reset ( ioaddr ); - - if ( ( rc = pcnet32_set_ops ( priv ) ) != 0 ) { - DBG ( "Setting driver operations failed\n"); - goto err_set_ops; - } - - if ( ( rc = pcnet32_chip_detect ( priv ) ) != 0 ) { - DBG ( "pcnet32_chip_detect failed\n" ); - goto err_chip_detect; - } - - /* Enter bus mastering mode */ - adjust_pci_device ( pdev ); - - /* Verify and get MAC address */ - if ( ( rc = pcnet32_setup_mac_addr ( priv ) ) != 0 ) { - DBG ( "Setting MAC address failed\n" ); - goto err_mac_addr; - } - - DBG ( "IO Addr 0x%lX, MAC Addr %s\n", ioaddr, - eth_ntoa ( netdev->hw_addr ) ); - - priv->options = PCNET32_PORT_ASEL; - - /* Detect special T1/E1 WAN card by checking for MAC address */ - if ( netdev->hw_addr[0] == 0x00 && - netdev->hw_addr[1] == 0xE0 && - netdev->hw_addr[2] == 0x75 ) - priv->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI; - - /* Probe the PHY so we can check link state and speed */ - pcnet32_setup_probe_phy ( priv ); - - if ( ( rc = register_netdev ( netdev ) ) != 0 ) { - DBG ( "Error registering netdev\n" ); - goto err_register; - } - - netdev_link_up ( netdev ); - - return 0; - -err_register: - netdev_put ( netdev ); -err_chip_detect: -err_set_ops: -err_alloc_etherdev: -err_mac_addr: - return rc; -} - -/** - * remove - Device Removal Routine - * - * @v pdev PCI device information struct - **/ -static void -pcnet32_remove ( struct pci_device *pdev ) -{ - struct net_device *netdev = pci_get_drvdata ( pdev ); - unsigned long ioaddr = pdev->ioaddr; - - DBGP ( "pcnet32_remove\n" ); - - /* Reset the chip */ - pcnet32_wio_reset ( ioaddr ); - - unregister_netdev ( netdev ); - netdev_nullify ( netdev ); - netdev_put ( netdev ); -} - -static struct pci_device_id pcnet32_nics[] = { - PCI_ROM(0x1022, 0x2000, "pcnet32", "AMD PCnet/PCI", 0), - PCI_ROM(0x1022, 0x2625, "pcnetfastiii", "AMD PCNet FAST III", 0), - PCI_ROM(0x1022, 0x2001, "amdhomepna", "AMD PCnet/HomePNA", 0), -}; - -struct pci_driver pcnet32_driver __pci_driver = { - .ids = pcnet32_nics, - .id_count = ARRAY_SIZE ( pcnet32_nics ), - .probe = pcnet32_probe, - .remove = pcnet32_remove, -}; 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