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/*
Copyright (C) 2021 Free Software Foundation, Inc.
This file is part of the GNU Hurd.
The GNU Hurd 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, or (at
your option) any later version.
The GNU Hurd 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 the GNU Hurd. If not, see <http://www.gnu.org/licenses/>.
*/
/* Implementation for device memory mapping functions */
#include <pciaccess.h>
#include "device_map.h"
error_t
device_map_region (struct pci_device *device, struct pci_mem_region *region,
void **addr)
{
error_t err = 0;
if (*addr == 0)
{
/*
* We could use the non-legacy call for all ranges, but libpciaccess
* offers a call for ranges under 1Mb. We call it for those cases, even
* when there's no difference for us.
*/
if (region->base_addr > 0x100000
|| region->base_addr + region->size > 0x100000)
err = pci_device_map_range (device, region->base_addr, region->size,
PCI_DEV_MAP_FLAG_WRITABLE, addr);
else
err = pci_device_map_legacy (device, region->base_addr, region->size,
PCI_DEV_MAP_FLAG_WRITABLE, addr);
}
return err;
}
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