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/*
* (C) Copyright IBM Corporation 2006
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/**
* \file common_iterator.c
* Platform independent iterator support routines.
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#include <stdlib.h>
#include <string.h>
#include "pciaccess.h"
#include "pciaccess_private.h"
/**
* Track device iteration state
*
* \private
*/
struct pci_device_iterator {
unsigned next_index;
enum {
match_any,
match_slot,
match_id
} mode;
union {
struct pci_slot_match slot;
struct pci_id_match id;
} match;
};
/**
* Create an iterator based on a regular expression.
*
* \return
* A pointer to a fully initialized \c pci_device_iterator structure on
* success, or \c NULL on failure.
*
* \sa pci_id_match_iterator_create, pci_device_next, pci_iterator_destroy
*/
struct pci_device_iterator *
pci_slot_match_iterator_create( const struct pci_slot_match * match )
{
struct pci_device_iterator * iter;
if ( pci_sys == NULL ) {
return NULL;
}
iter = malloc( sizeof( *iter ) );
if ( iter != NULL ) {
iter->next_index = 0;
if ( match != NULL ) {
iter->mode = match_slot;
(void) memcpy( & iter->match.slot, match, sizeof( *match ) );
}
else {
iter->mode = match_any;
}
}
return iter;
}
/**
* Create an iterator based on a regular expression.
*
* \return
* A pointer to a fully initialized \c pci_device_iterator structure on
* success, or \c NULL on failure.
*
* \sa pci_slot_match_iterator_create, pci_device_next, pci_iterator_destroy
*/
struct pci_device_iterator *
pci_id_match_iterator_create( const struct pci_id_match * match )
{
struct pci_device_iterator * iter;
if ( pci_sys == NULL ) {
return NULL;
}
iter = malloc( sizeof( *iter ) );
if ( iter != NULL ) {
iter->next_index = 0;
if ( match != NULL ) {
iter->mode = match_id;
(void) memcpy( & iter->match.id, match, sizeof( *match ) );
}
else {
iter->mode = match_any;
}
}
return iter;
}
/**
* Destroy an iterator previously created with \c pci_iterator_create.
*
* \param iter Iterator to be destroyed.
*
* \sa pci_device_next, pci_iterator_create
*/
void
pci_iterator_destroy( struct pci_device_iterator * iter )
{
if ( iter != NULL ) {
free( iter );
}
}
/**
* Iterate to the next PCI device.
*
* \param iter Device iterator returned by \c pci_device_iterate.
*
* \return
* A pointer to a \c pci_device, or \c NULL when all devices have been
* iterated.
*/
struct pci_device *
pci_device_next( struct pci_device_iterator * iter )
{
struct pci_device_private * d = NULL;
if (!iter)
return NULL;
switch( iter->mode ) {
case match_any:
if ( iter->next_index < pci_sys->num_devices ) {
d = & pci_sys->devices[ iter->next_index ];
iter->next_index++;
}
break;
case match_slot: {
while ( iter->next_index < pci_sys->num_devices ) {
struct pci_device_private * const temp =
& pci_sys->devices[ iter->next_index ];
iter->next_index++;
if ( PCI_ID_COMPARE( iter->match.slot.domain, temp->base.domain )
&& PCI_ID_COMPARE( iter->match.slot.bus, temp->base.bus )
&& PCI_ID_COMPARE( iter->match.slot.dev, temp->base.dev )
&& PCI_ID_COMPARE( iter->match.slot.func, temp->base.func ) ) {
d = temp;
break;
}
}
break;
}
case match_id: {
while ( iter->next_index < pci_sys->num_devices ) {
struct pci_device_private * const temp =
& pci_sys->devices[ iter->next_index ];
iter->next_index++;
if ( PCI_ID_COMPARE( iter->match.id.vendor_id, temp->base.vendor_id )
&& PCI_ID_COMPARE( iter->match.id.device_id, temp->base.device_id )
&& PCI_ID_COMPARE( iter->match.id.subvendor_id, temp->base.subvendor_id )
&& PCI_ID_COMPARE( iter->match.id.subdevice_id, temp->base.subdevice_id )
&& ((temp->base.device_class & iter->match.id.device_class_mask)
== iter->match.id.device_class) ) {
d = temp;
break;
}
}
break;
}
}
return (struct pci_device *) d;
}
struct pci_device *
pci_device_find_by_slot( uint32_t domain, uint32_t bus, uint32_t dev,
uint32_t func )
{
struct pci_device_iterator iter;
iter.next_index = 0;
iter.mode = match_slot;
iter.match.slot.domain = domain;
iter.match.slot.bus = bus;
iter.match.slot.dev = dev;
iter.match.slot.func = func;
return pci_device_next( & iter );
}
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