* (C) Copyright 2004 Silicon Graphics, Inc. Jesse Barnes <jbarnes@sgi.com>
*
* PCI ROM access routines
- *
*/
-
-
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/pci.h>
+#include <linux/slab.h>
#include "pci.h"
/**
* pci_enable_rom - enable ROM decoding for a PCI device
- * @dev: PCI device to enable
+ * @pdev: PCI device to enable
*
* Enable ROM decoding on @dev. This involves simply turning on the last
* bit of the PCI ROM BAR. Note that some cards may share address decoders
* between the ROM and other resources, so enabling it may disable access
* to MMIO registers or other card memory.
*/
-static void
-pci_enable_rom(struct pci_dev *pdev)
+static int pci_enable_rom(struct pci_dev *pdev)
{
+ struct resource *res = pdev->resource + PCI_ROM_RESOURCE;
+ struct pci_bus_region region;
u32 rom_addr;
-
+
+ if (!res->flags)
+ return -1;
+
+ pcibios_resource_to_bus(pdev, ®ion, res);
pci_read_config_dword(pdev, pdev->rom_base_reg, &rom_addr);
- rom_addr |= PCI_ROM_ADDRESS_ENABLE;
+ rom_addr &= ~PCI_ROM_ADDRESS_MASK;
+ rom_addr |= region.start | PCI_ROM_ADDRESS_ENABLE;
pci_write_config_dword(pdev, pdev->rom_base_reg, rom_addr);
+ return 0;
}
/**
* pci_disable_rom - disable ROM decoding for a PCI device
- * @dev: PCI device to disable
+ * @pdev: PCI device to disable
*
* Disable ROM decoding on a PCI device by turning off the last bit in the
* ROM BAR.
*/
-static void
-pci_disable_rom(struct pci_dev *pdev)
+static void pci_disable_rom(struct pci_dev *pdev)
{
u32 rom_addr;
pci_read_config_dword(pdev, pdev->rom_base_reg, &rom_addr);
/**
* pci_map_rom - map a PCI ROM to kernel space
- * @dev: pointer to pci device struct
+ * @pdev: pointer to pci device struct
* @size: pointer to receive size of pci window over ROM
* @return: kernel virtual pointer to image of ROM
*
* Map a PCI ROM into kernel space. If ROM is boot video ROM,
- * the shadow BIOS copy will be returned instead of the
+ * the shadow BIOS copy will be returned instead of the
* actual ROM.
*/
void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size)
void __iomem *rom;
void __iomem *image;
int last_image;
-
- if (res->flags & IORESOURCE_ROM_SHADOW) { /* IORESOURCE_ROM_SHADOW only set on x86 */
- start = (loff_t)0xC0000; /* primary video rom always starts here */
- *size = 0x20000; /* cover C000:0 through E000:0 */
+
+ /*
+ * IORESOURCE_ROM_SHADOW set on x86, x86_64 and IA64 supports legacy
+ * memory map if the VGA enable bit of the Bridge Control register is
+ * set for embedded VGA.
+ */
+ if (res->flags & IORESOURCE_ROM_SHADOW) {
+ /* primary video rom always starts here */
+ start = (loff_t)0xC0000;
+ *size = 0x20000; /* cover C000:0 through E000:0 */
} else {
- if (res->flags & IORESOURCE_ROM_COPY) {
+ if (res->flags &
+ (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY)) {
*size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
- return (void __iomem *)pci_resource_start(pdev, PCI_ROM_RESOURCE);
+ return (void __iomem *)(unsigned long)
+ pci_resource_start(pdev, PCI_ROM_RESOURCE);
} else {
/* assign the ROM an address if it doesn't have one */
- if (res->parent == NULL)
- pci_assign_resource(pdev, PCI_ROM_RESOURCE);
-
+ if (res->parent == NULL &&
+ pci_assign_resource(pdev,PCI_ROM_RESOURCE))
+ return NULL;
start = pci_resource_start(pdev, PCI_ROM_RESOURCE);
*size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
if (*size == 0)
return NULL;
-
+
/* Enable ROM space decodes */
- pci_enable_rom(pdev);
+ if (pci_enable_rom(pdev))
+ return NULL;
}
}
-
+
rom = ioremap(start, *size);
if (!rom) {
/* restore enable if ioremap fails */
- if (!(res->flags & (IORESOURCE_ROM_ENABLE | IORESOURCE_ROM_SHADOW | IORESOURCE_ROM_COPY)))
+ if (!(res->flags & (IORESOURCE_ROM_ENABLE |
+ IORESOURCE_ROM_SHADOW |
+ IORESOURCE_ROM_COPY)))
pci_disable_rom(pdev);
return NULL;
- }
+ }
- /* Try to find the true size of the ROM since sometimes the PCI window */
- /* size is much larger than the actual size of the ROM. */
- /* True size is important if the ROM is going to be copied. */
+ /*
+ * Try to find the true size of the ROM since sometimes the PCI window
+ * size is much larger than the actual size of the ROM.
+ * True size is important if the ROM is going to be copied.
+ */
image = rom;
do {
void __iomem *pds;
image += readw(pds + 16) * 512;
} while (!last_image);
- *size = image - rom;
+ /* never return a size larger than the PCI resource window */
+ /* there are known ROMs that get the size wrong */
+ *size = min((size_t)(image - rom), *size);
return rom;
}
/**
* pci_map_rom_copy - map a PCI ROM to kernel space, create a copy
- * @dev: pointer to pci device struct
+ * @pdev: pointer to pci device struct
* @size: pointer to receive size of pci window over ROM
* @return: kernel virtual pointer to image of ROM
*
* Map a PCI ROM into kernel space. If ROM is boot video ROM,
- * the shadow BIOS copy will be returned instead of the
+ * the shadow BIOS copy will be returned instead of the
* actual ROM.
*/
void __iomem *pci_map_rom_copy(struct pci_dev *pdev, size_t *size)
{
struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
void __iomem *rom;
-
+
rom = pci_map_rom(pdev, size);
if (!rom)
return NULL;
-
- if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_SHADOW))
+
+ if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_SHADOW |
+ IORESOURCE_ROM_BIOS_COPY))
return rom;
-
+
res->start = (unsigned long)kmalloc(*size, GFP_KERNEL);
- if (!res->start)
+ if (!res->start)
return rom;
- res->end = res->start + *size;
- memcpy_fromio((void*)res->start, rom, *size);
+ res->end = res->start + *size;
+ memcpy_fromio((void*)(unsigned long)res->start, rom, *size);
pci_unmap_rom(pdev, rom);
res->flags |= IORESOURCE_ROM_COPY;
-
- return (void __iomem *)res->start;
+
+ return (void __iomem *)(unsigned long)res->start;
}
/**
* pci_unmap_rom - unmap the ROM from kernel space
- * @dev: pointer to pci device struct
+ * @pdev: pointer to pci device struct
* @rom: virtual address of the previous mapping
*
* Remove a mapping of a previously mapped ROM
*/
-void
-pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom)
+void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom)
{
struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
- if (res->flags & IORESOURCE_ROM_COPY)
+ if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY))
return;
-
+
iounmap(rom);
-
+
/* Disable again before continuing, leave enabled if pci=rom */
if (!(res->flags & (IORESOURCE_ROM_ENABLE | IORESOURCE_ROM_SHADOW)))
pci_disable_rom(pdev);
/**
* pci_remove_rom - disable the ROM and remove its sysfs attribute
- * @dev: pointer to pci device struct
+ * @pdev: pointer to pci device struct
*
+ * Remove the rom file in sysfs and disable ROM decoding.
*/
-void
-pci_remove_rom(struct pci_dev *pdev)
+void pci_remove_rom(struct pci_dev *pdev)
{
struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
-
+
if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
- if (!(res->flags & (IORESOURCE_ROM_ENABLE | IORESOURCE_ROM_SHADOW | IORESOURCE_ROM_COPY)))
+ if (!(res->flags & (IORESOURCE_ROM_ENABLE |
+ IORESOURCE_ROM_SHADOW |
+ IORESOURCE_ROM_BIOS_COPY |
+ IORESOURCE_ROM_COPY)))
pci_disable_rom(pdev);
}
/**
- * pci_cleanup_rom - internal routine for freeing the ROM copy created
+ * pci_cleanup_rom - internal routine for freeing the ROM copy created
* by pci_map_rom_copy called from remove.c
- * @dev: pointer to pci device struct
+ * @pdev: pointer to pci device struct
*
+ * Free the copied ROM if we allocated one.
*/
-void
-pci_cleanup_rom(struct pci_dev *pdev)
+void pci_cleanup_rom(struct pci_dev *pdev)
{
struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
if (res->flags & IORESOURCE_ROM_COPY) {
- kfree((void*)res->start);
+ kfree((void*)(unsigned long)res->start);
res->flags &= ~IORESOURCE_ROM_COPY;
res->start = 0;
res->end = 0;
git://git.onelab.eu / linux-2.6.git / blobdiff