pcibridge.c File Reference

PCI-to-PCI bridge. More...

#include <stddef.h>
#include <stdint.h>
#include <errno.h>
#include <byteswap.h>
#include <ipxe/pci.h>
#include <ipxe/pcibridge.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static	LIST_HEAD (pcibridges)
	List of all PCI bridges. More...
struct pci_bridge *	pcibridge_find (struct pci_device *pci)
	Find bridge attached to a PCI device. More...
static int	pcibridge_probe (struct pci_device *pci)
	Probe PCI device. More...
static void	pcibridge_remove (struct pci_device *pci)
	Remove PCI device. More...

Variables
static struct pci_device_id	pcibridge_ids []
	Bridge PCI device IDs. More...
struct pci_driver pcibridge_driver	__pci_driver
	Bridge PCI driver. More...

Detailed Description

PCI-to-PCI bridge.

Definition in file pcibridge.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

LIST_HEAD()

static LIST_HEAD ( pcibridges  )

static

List of all PCI bridges.

pcibridge_find()

struct pci_bridge* pcibridge_find

(

struct pci_device *

pci

)

Find bridge attached to a PCI device.

Parameters

pci	PCI device

Return values

bridge

PCI bridge, or NULL

Definition at line 48 of file pcibridge.c.

                                                              {
        unsigned int bus = PCI_BUS ( pci->busdevfn );
        struct pci_bridge *bridge;

        /* Find matching bridge */
        list_for_each_entry ( bridge, &pcibridges, list ) {
                if ( bus == bridge->secondary )
                        return bridge;
        }

        return NULL;
}

References bus, pci_device::busdevfn, pci_bridge::list, list_for_each_entry, NULL, pci_bridge::pci, PCI_BUS, and pci_bridge::secondary.

Referenced by ena_membase().

pcibridge_probe()

static int pcibridge_probe ( struct pci_device *  pci )

static

Probe PCI device.

Parameters

pci	PCI device

Return values

rc	Return status code

Definition at line 67 of file pcibridge.c.

                                                      {
        struct pci_bridge *bridge;
        uint16_t base;
        uint16_t limit;
        int rc;

        /* Allocate and initialise structure */
        bridge = zalloc ( sizeof ( *bridge ) );
        if ( ! bridge ) {
                rc = -ENOMEM;
                goto err_alloc;
        }
        bridge->pci = pci;

        /* Read configuration */
        pci_read_config_dword ( pci, PCI_PRIMARY, &bridge->buses );
        cpu_to_le32s ( &buses );
        pci_read_config_word ( pci, PCI_MEM_BASE, &base );
        bridge->membase = ( ( base & ~PCI_MEM_MASK ) << 16 );
        pci_read_config_word ( pci, PCI_MEM_LIMIT, &limit );
        bridge->memlimit = ( ( ( ( limit | PCI_MEM_MASK ) + 1 ) << 16 ) - 1 );
        DBGC ( bridge, "BRIDGE " PCI_FMT " bus %02x to [%02x,%02x) mem "
               "[%08x,%08x)\n", PCI_ARGS ( pci ), bridge->primary,
               bridge->secondary, bridge->subordinate, bridge->membase,
               bridge->memlimit );

        /* Add to list of PCI bridges */
        list_add ( &bridge->list, &pcibridges );

        pci_set_drvdata ( pci, bridge );
        return 0;

        free ( bridge );
 err_alloc:
        return rc;
}

References base, pci_bridge::buses, cpu_to_le32s, DBGC, ENOMEM, free, limit, pci_bridge::list, list_add, pci_bridge::membase, pci_bridge::memlimit, pci_bridge::pci, PCI_ARGS, PCI_FMT, PCI_MEM_BASE, PCI_MEM_LIMIT, PCI_MEM_MASK, PCI_PRIMARY, pci_read_config_dword(), pci_read_config_word(), pci_set_drvdata(), pci_bridge::primary, rc, pci_bridge::secondary, pci_bridge::subordinate, and zalloc().

pcibridge_remove()

static void pcibridge_remove ( struct pci_device *  pci )

static

Remove PCI device.

Parameters

pci	PCI device

Definition at line 109 of file pcibridge.c.

                                                        {
        struct pci_bridge *bridge = pci_get_drvdata ( pci );

        /* Remove from list of bridges */
        list_del ( &bridge->list );

        /* Free device */
        free ( bridge );
}

References free, pci_bridge::list, list_del, pci_bridge::pci, and pci_get_drvdata().

Variable Documentation

pcibridge_ids

struct pci_device_id pcibridge_ids[]

static

Initial value:

= {
        PCI_ROM ( 0xffff, 0xffff, "bridge", "Bridge", 0 ),
}

Bridge PCI device IDs.

Definition at line 120 of file pcibridge.c.

__pci_driver

struct pci_driver pcibridge_driver __pci_driver

Initial value:

= {
        .ids = pcibridge_ids,
        .id_count = ( sizeof ( pcibridge_ids ) / sizeof ( pcibridge_ids[0] ) ),
        .class = PCI_CLASS_ID ( PCI_CLASS_BRIDGE, PCI_CLASS_BRIDGE_PCI,
                                PCI_ANY_ID ),
        .probe = pcibridge_probe,
        .remove = pcibridge_remove,
}

Bridge PCI driver.

Definition at line 125 of file pcibridge.c.