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Diffstat (limited to 'gpxe/src/drivers/bus/pci.c')
-rw-r--r--gpxe/src/drivers/bus/pci.c341
1 files changed, 0 insertions, 341 deletions
diff --git a/gpxe/src/drivers/bus/pci.c b/gpxe/src/drivers/bus/pci.c
deleted file mode 100644
index 8899e6e1..00000000
--- a/gpxe/src/drivers/bus/pci.c
+++ /dev/null
@@ -1,341 +0,0 @@
-/*
- * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * Based in part on pci.c from Etherboot 5.4, by Ken Yap and David
- * Munro, in turn based on the Linux kernel's PCI implementation.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <gpxe/tables.h>
-#include <gpxe/device.h>
-#include <gpxe/pci.h>
-
-/** @file
- *
- * PCI bus
- *
- */
-
-static void pcibus_remove ( struct root_device *rootdev );
-
-/**
- * Read PCI BAR
- *
- * @v pci PCI device
- * @v reg PCI register number
- * @ret bar Base address register
- *
- * Reads the specified PCI base address register, including the flags
- * portion. 64-bit BARs will be handled automatically. If the value
- * of the 64-bit BAR exceeds the size of an unsigned long (i.e. if the
- * high dword is non-zero on a 32-bit platform), then the value
- * returned will be zero plus the flags for a 64-bit BAR. Unreachable
- * 64-bit BARs are therefore returned as uninitialised 64-bit BARs.
- */
-static unsigned long pci_bar ( struct pci_device *pci, unsigned int reg ) {
- uint32_t low;
- uint32_t high;
-
- pci_read_config_dword ( pci, reg, &low );
- if ( ( low & (PCI_BASE_ADDRESS_SPACE|PCI_BASE_ADDRESS_MEM_TYPE_MASK) )
- == (PCI_BASE_ADDRESS_SPACE_MEMORY|PCI_BASE_ADDRESS_MEM_TYPE_64) ){
- pci_read_config_dword ( pci, reg + 4, &high );
- if ( high ) {
- if ( sizeof ( unsigned long ) > sizeof ( uint32_t ) ) {
- return ( ( ( uint64_t ) high << 32 ) | low );
- } else {
- DBG ( "Unhandled 64-bit BAR %08x%08x\n",
- high, low );
- return PCI_BASE_ADDRESS_MEM_TYPE_64;
- }
- }
- }
- return low;
-}
-
-/**
- * Find the start of a PCI BAR
- *
- * @v pci PCI device
- * @v reg PCI register number
- * @ret start BAR start address
- *
- * Reads the specified PCI base address register, and returns the
- * address portion of the BAR (i.e. without the flags).
- *
- * If the address exceeds the size of an unsigned long (i.e. if a
- * 64-bit BAR has a non-zero high dword on a 32-bit machine), the
- * return value will be zero.
- */
-unsigned long pci_bar_start ( struct pci_device *pci, unsigned int reg ) {
- unsigned long bar;
-
- bar = pci_bar ( pci, reg );
- if ( (bar & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY ){
- return ( bar & PCI_BASE_ADDRESS_MEM_MASK );
- } else {
- return ( bar & PCI_BASE_ADDRESS_IO_MASK );
- }
-}
-
-/**
- * Read membase and ioaddr for a PCI device
- *
- * @v pci PCI device
- *
- * This scans through all PCI BARs on the specified device. The first
- * valid memory BAR is recorded as pci_device::membase, and the first
- * valid IO BAR is recorded as pci_device::ioaddr.
- *
- * 64-bit BARs are handled automatically. On a 32-bit platform, if a
- * 64-bit BAR has a non-zero high dword, it will be regarded as
- * invalid.
- */
-static void pci_read_bases ( struct pci_device *pci ) {
- unsigned long bar;
- int reg;
-
- for ( reg = PCI_BASE_ADDRESS_0; reg <= PCI_BASE_ADDRESS_5; reg += 4 ) {
- bar = pci_bar ( pci, reg );
- if ( bar & PCI_BASE_ADDRESS_SPACE_IO ) {
- if ( ! pci->ioaddr )
- pci->ioaddr =
- ( bar & PCI_BASE_ADDRESS_IO_MASK );
- } else {
- if ( ! pci->membase )
- pci->membase =
- ( bar & PCI_BASE_ADDRESS_MEM_MASK );
- /* Skip next BAR if 64-bit */
- if ( bar & PCI_BASE_ADDRESS_MEM_TYPE_64 )
- reg += 4;
- }
- }
-}
-
-/**
- * Enable PCI device
- *
- * @v pci PCI device
- *
- * Set device to be a busmaster in case BIOS neglected to do so. Also
- * adjust PCI latency timer to a reasonable value, 32.
- */
-void adjust_pci_device ( struct pci_device *pci ) {
- unsigned short new_command, pci_command;
- unsigned char pci_latency;
-
- pci_read_config_word ( pci, PCI_COMMAND, &pci_command );
- new_command = ( pci_command | PCI_COMMAND_MASTER |
- PCI_COMMAND_MEM | PCI_COMMAND_IO );
- if ( pci_command != new_command ) {
- DBG ( "PCI BIOS has not enabled device %02x:%02x.%x! "
- "Updating PCI command %04x->%04x\n", pci->bus,
- PCI_SLOT ( pci->devfn ), PCI_FUNC ( pci->devfn ),
- pci_command, new_command );
- pci_write_config_word ( pci, PCI_COMMAND, new_command );
- }
-
- pci_read_config_byte ( pci, PCI_LATENCY_TIMER, &pci_latency);
- if ( pci_latency < 32 ) {
- DBG ( "PCI device %02x:%02x.%x latency timer is unreasonably "
- "low at %d. Setting to 32.\n", pci->bus,
- PCI_SLOT ( pci->devfn ), PCI_FUNC ( pci->devfn ),
- pci_latency );
- pci_write_config_byte ( pci, PCI_LATENCY_TIMER, 32);
- }
-}
-
-/**
- * Probe a PCI device
- *
- * @v pci PCI device
- * @ret rc Return status code
- *
- * Searches for a driver for the PCI device. If a driver is found,
- * its probe() routine is called.
- */
-static int pci_probe ( struct pci_device *pci ) {
- struct pci_driver *driver;
- struct pci_device_id *id;
- unsigned int i;
- int rc;
-
- DBG ( "Adding PCI device %02x:%02x.%x (%04x:%04x mem %lx io %lx "
- "irq %d)\n", pci->bus, PCI_SLOT ( pci->devfn ),
- PCI_FUNC ( pci->devfn ), pci->vendor, pci->device,
- pci->membase, pci->ioaddr, pci->irq );
-
- for_each_table_entry ( driver, PCI_DRIVERS ) {
- for ( i = 0 ; i < driver->id_count ; i++ ) {
- id = &driver->ids[i];
- if ( ( id->vendor != PCI_ANY_ID ) &&
- ( id->vendor != pci->vendor ) )
- continue;
- if ( ( id->device != PCI_ANY_ID ) &&
- ( id->device != pci->device ) )
- continue;
- pci->driver = driver;
- pci->driver_name = id->name;
- DBG ( "...using driver %s\n", pci->driver_name );
- if ( ( rc = driver->probe ( pci, id ) ) != 0 ) {
- DBG ( "......probe failed\n" );
- continue;
- }
- return 0;
- }
- }
-
- DBG ( "...no driver found\n" );
- return -ENOTTY;
-}
-
-/**
- * Remove a PCI device
- *
- * @v pci PCI device
- */
-static void pci_remove ( struct pci_device *pci ) {
- pci->driver->remove ( pci );
- DBG ( "Removed PCI device %02x:%02x.%x\n", pci->bus,
- PCI_SLOT ( pci->devfn ), PCI_FUNC ( pci->devfn ) );
-}
-
-/**
- * Probe PCI root bus
- *
- * @v rootdev PCI bus root device
- *
- * Scans the PCI bus for devices and registers all devices it can
- * find.
- */
-static int pcibus_probe ( struct root_device *rootdev ) {
- struct pci_device *pci = NULL;
- unsigned int max_bus;
- unsigned int bus;
- unsigned int devfn;
- uint8_t hdrtype = 0;
- uint32_t tmp;
- int rc;
-
- max_bus = pci_max_bus();
- for ( bus = 0 ; bus <= max_bus ; bus++ ) {
- for ( devfn = 0 ; devfn <= 0xff ; devfn++ ) {
-
- /* Allocate struct pci_device */
- if ( ! pci )
- pci = malloc ( sizeof ( *pci ) );
- if ( ! pci ) {
- rc = -ENOMEM;
- goto err;
- }
- memset ( pci, 0, sizeof ( *pci ) );
- pci->bus = bus;
- pci->devfn = devfn;
-
- /* Skip all but the first function on
- * non-multifunction cards
- */
- if ( PCI_FUNC ( devfn ) == 0 ) {
- pci_read_config_byte ( pci, PCI_HEADER_TYPE,
- &hdrtype );
- } else if ( ! ( hdrtype & 0x80 ) ) {
- continue;
- }
-
- /* Check for physical device presence */
- pci_read_config_dword ( pci, PCI_VENDOR_ID, &tmp );
- if ( ( tmp == 0xffffffff ) || ( tmp == 0 ) )
- continue;
-
- /* Populate struct pci_device */
- pci->vendor = ( tmp & 0xffff );
- pci->device = ( tmp >> 16 );
- pci_read_config_dword ( pci, PCI_REVISION, &tmp );
- pci->class = ( tmp >> 8 );
- pci_read_config_byte ( pci, PCI_INTERRUPT_LINE,
- &pci->irq );
- pci_read_bases ( pci );
-
- /* Add to device hierarchy */
- snprintf ( pci->dev.name, sizeof ( pci->dev.name ),
- "PCI%02x:%02x.%x", bus,
- PCI_SLOT ( devfn ), PCI_FUNC ( devfn ) );
- pci->dev.desc.bus_type = BUS_TYPE_PCI;
- pci->dev.desc.location = PCI_BUSDEVFN (bus, devfn);
- pci->dev.desc.vendor = pci->vendor;
- pci->dev.desc.device = pci->device;
- pci->dev.desc.class = pci->class;
- pci->dev.desc.ioaddr = pci->ioaddr;
- pci->dev.desc.irq = pci->irq;
- pci->dev.parent = &rootdev->dev;
- list_add ( &pci->dev.siblings, &rootdev->dev.children);
- INIT_LIST_HEAD ( &pci->dev.children );
-
- /* Look for a driver */
- if ( pci_probe ( pci ) == 0 ) {
- /* pcidev registered, we can drop our ref */
- pci = NULL;
- } else {
- /* Not registered; re-use struct pci_device */
- list_del ( &pci->dev.siblings );
- }
- }
- }
-
- free ( pci );
- return 0;
-
- err:
- free ( pci );
- pcibus_remove ( rootdev );
- return rc;
-}
-
-/**
- * Remove PCI root bus
- *
- * @v rootdev PCI bus root device
- */
-static void pcibus_remove ( struct root_device *rootdev ) {
- struct pci_device *pci;
- struct pci_device *tmp;
-
- list_for_each_entry_safe ( pci, tmp, &rootdev->dev.children,
- dev.siblings ) {
- pci_remove ( pci );
- list_del ( &pci->dev.siblings );
- free ( pci );
- }
-}
-
-/** PCI bus root device driver */
-static struct root_driver pci_root_driver = {
- .probe = pcibus_probe,
- .remove = pcibus_remove,
-};
-
-/** PCI bus root device */
-struct root_device pci_root_device __root_device = {
- .dev = { .name = "PCI" },
- .driver = &pci_root_driver,
-};
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