pci_settings.c File Reference

PCI device settings. More...

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ipxe/pci.h>
#include <ipxe/settings.h>
#include <ipxe/init.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static int	pci_settings_applies (struct settings *settings __unused, const struct setting *setting)
	Check applicability of PCI device setting. More...
static int	pci_settings_fetch (struct settings *settings __unused, struct setting *setting, void *data, size_t len)
	Fetch value of PCI device setting. More...
static void	pci_settings_init (void)
	Initialise PCI device settings. More...
struct init_fn pci_settings_init_fn	__init_fn (INIT_NORMAL)
	PCI device settings initialiser. More...

Variables
static const struct settings_scope	pci_settings_scope
	PCI device settings scope. More...
static struct settings_operations	pci_settings_operations
	PCI device settings operations. More...
static struct settings	pci_settings
	PCI device settings. More...

Detailed Description

PCI device settings.

Definition in file pci_settings.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

pci_settings_applies()

static int pci_settings_applies ( struct settings *settings  __unused, const struct setting *  setting  )

static

Check applicability of PCI device setting.

Parameters

settings	Settings block
setting	Setting

Return values

applies

Setting applies within this settings block

Definition at line 49 of file pci_settings.c.

                                                                  {

        return ( setting->scope == &pci_settings_scope );
}

References pci_settings_scope, and setting::scope.

pci_settings_fetch()

static int pci_settings_fetch ( struct settings *settings  __unused, struct setting *  setting, void *  data, size_t  len  )

static

Fetch value of PCI device setting.

Parameters

settings	Settings block
setting	Setting to fetch
data	Buffer to fill with setting data
len	Length of buffer

Return values

len	Length of setting data, or negative error

Definition at line 64 of file pci_settings.c.

                                                         {
        struct pci_device pci;
        unsigned int tag_busdevfn;
        unsigned int tag_offset;
        unsigned int tag_len;
        unsigned int i;

        /* Extract busdevfn, offset, and length from tag */
        tag_busdevfn = ( setting->tag >> 16 );
        tag_offset = ( ( setting->tag >> 8 ) & 0xff );
        tag_len = ( ( setting->tag >> 0 ) & 0xff );

        /* Locate PCI device */
        memset ( &pci, 0, sizeof ( pci ) );
        pci_init ( &pci, tag_busdevfn );
        DBG ( PCI_FMT " reading %#02x+%#x\n", PCI_ARGS ( &pci ),
              tag_offset, tag_len );

        /* Read data one byte at a time, in reverse order (since PCI
         * is little-endian and iPXE settings are essentially
         * big-endian).
         */
        tag_offset += tag_len;
        for ( i = 0 ; ( ( i < tag_len ) && ( i < len ) ); i++ ) {
                pci_read_config_byte ( &pci, --tag_offset, data++ );
        }

        /* Set type to ":hexraw" if not already specified */
        if ( ! setting->type )
                setting->type = &setting_type_hexraw;

        return tag_len;
}

References data, DBG, len, memset(), PCI_ARGS, PCI_FMT, pci_init(), pci_read_config_byte(), setting::tag, and setting::type.

pci_settings_init()

static void pci_settings_init ( void  )

static

Initialise PCI device settings.

Definition at line 116 of file pci_settings.c.

                                       {
        int rc;

        if ( ( rc = register_settings ( &pci_settings, NULL, "pci" ) ) != 0 ) {
                DBG ( "PCI could not register settings: %s\n",
                      strerror ( rc ) );
                return;
        }
}

References DBG, NULL, pci_settings, rc, register_settings(), and strerror().

__init_fn()

struct init_fn pci_settings_init_fn __init_fn

(

INIT_NORMAL

)

PCI device settings initialiser.

Variable Documentation

pci_settings_scope

const struct settings_scope pci_settings_scope

static

PCI device settings scope.

Definition at line 40 of file pci_settings.c.

Referenced by pci_settings_applies().

pci_settings_operations

struct settings_operations pci_settings_operations

static

Initial value:

= {
        .applies = pci_settings_applies,
        .fetch = pci_settings_fetch,
}

PCI device settings operations.

Definition at line 101 of file pci_settings.c.

pci_settings

struct settings pci_settings

static

Initial value:

= {
        .refcnt = NULL,
        .siblings = LIST_HEAD_INIT ( pci_settings.siblings ),
        .children = LIST_HEAD_INIT ( pci_settings.children ),
        .op = &pci_settings_operations,
        .default_scope = &pci_settings_scope,
}

PCI device settings.

Definition at line 107 of file pci_settings.c.

Referenced by pci_settings_init().