97f47e73c4
Loongson 3 used the IORESOURCE_ROM_COPY flag for its ROM resource. There
are two problems with this:
- When IORESOURCE_ROM_COPY is set, pci_map_rom() assumes the resource
contains virtual addresses, so it doesn't ioremap the resource. This
implies loongson_sysconf.vgabios_addr is a virtual address. That's a
problem because resources should contain CPU *physical* addresses not
virtual addresses.
- When IORESOURCE_ROM_COPY is set, pci_cleanup_rom() calls kfree() on the
resource. We did not kmalloc() the loongson_sysconf.vgabios_addr area,
so it is incorrect to kfree() it.
If we're using a shadow copy in RAM for the Loongson 3 VGA BIOS area,
disable the ROM BAR and release the address space it was consuming.
Use IORESOURCE_ROM_SHADOW instead of IORESOURCE_ROM_COPY. This means the
struct resource contains CPU physical addresses, and pci_map_rom() will
ioremap() it as needed.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
|
|
* fixup-loongson3.c
|
|
*
|
|
* Copyright (C) 2012 Lemote, Inc.
|
|
* Author: Xiang Yu, xiangy@lemote.com
|
|
* Chen Huacai, chenhc@lemote.com
|
|
*
|
|
* 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 (at your
|
|
* option) any later version.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#include <linux/pci.h>
|
|
#include <boot_param.h>
|
|
|
|
static void print_fixup_info(const struct pci_dev *pdev)
|
|
{
|
|
dev_info(&pdev->dev, "Device %x:%x, irq %d\n",
|
|
pdev->vendor, pdev->device, pdev->irq);
|
|
}
|
|
|
|
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
print_fixup_info(dev);
|
|
return dev->irq;
|
|
}
|
|
|
|
static void pci_fixup_radeon(struct pci_dev *pdev)
|
|
{
|
|
struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
|
|
|
|
if (res->start)
|
|
return;
|
|
|
|
if (!loongson_sysconf.vgabios_addr)
|
|
return;
|
|
|
|
pci_disable_rom(pdev);
|
|
if (res->parent)
|
|
release_resource(res);
|
|
|
|
res->start = virt_to_phys((void *) loongson_sysconf.vgabios_addr);
|
|
res->end = res->start + 256*1024 - 1;
|
|
res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
|
|
IORESOURCE_PCI_FIXED;
|
|
|
|
dev_info(&pdev->dev, "BAR %d: assigned %pR for Radeon ROM\n",
|
|
PCI_ROM_RESOURCE, res);
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
|
|
PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_radeon);
|
|
|
|
/* Do platform specific device initialization at pci_enable_device() time */
|
|
int pcibios_plat_dev_init(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|