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x86/PCI: MMCONFIG: add virtual address to struct pci_mmcfg_region

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The virtual address is only used for x86_64, but it's so much simpler
to manage it as part of the pci_mmcfg_region that I think it's worth
wasting a pointer per MMCONFIG region on x86_32.

Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Bjorn Helgaas 2009-11-13 17:34:39 -07:00 committed by Jesse Barnes
parent 2f2a8b9c90
commit 3f0f550392
2 changed files with 15 additions and 31 deletions
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1
arch/x86/include/asm/pci_x86.h
View File

@ -124,6 +124,7 @@ extern int __init pcibios_init(void);
struct pci_mmcfg_region {
struct resource res;
u64 address;
char __iomem *virt;
u16 segment;
u8 start_bus;
u8 end_bus;

45
arch/x86/pci/mmconfig_64.c
View File

@ -12,24 +12,17 @@
#include <asm/e820.h>
#include <asm/pci_x86.h>
/* Static virtual mapping of the MMCONFIG aperture */
struct mmcfg_virt {
struct pci_mmcfg_region *cfg;
char __iomem *virt;
};
static struct mmcfg_virt *pci_mmcfg_virt;
static char __iomem *get_virt(unsigned int seg, unsigned bus)
{
int i;
struct pci_mmcfg_region *cfg;
int cfg_num;
for (cfg_num = 0; cfg_num < pci_mmcfg_config_num; cfg_num++) {
cfg = pci_mmcfg_virt[cfg_num].cfg;
for (i = 0; i < pci_mmcfg_config_num; ++i) {
cfg = &pci_mmcfg_config[i];
if (cfg->segment == seg &&
(cfg->start_bus <= bus) &&
(cfg->end_bus >= bus))
return pci_mmcfg_virt[cfg_num].virt;
return cfg->virt;
}
/* Fall back to type 0 */
@ -130,20 +123,15 @@ static void __iomem * __init mcfg_ioremap(struct pci_mmcfg_region *cfg)
int __init pci_mmcfg_arch_init(void)
{
int i;
pci_mmcfg_virt = kzalloc(sizeof(*pci_mmcfg_virt) *
pci_mmcfg_config_num, GFP_KERNEL);
if (pci_mmcfg_virt == NULL) {
printk(KERN_ERR "PCI: Can not allocate memory for mmconfig structures\n");
return 0;
}
struct pci_mmcfg_region *cfg;
for (i = 0; i < pci_mmcfg_config_num; ++i) {
pci_mmcfg_virt[i].cfg = &pci_mmcfg_config[i];
pci_mmcfg_virt[i].virt = mcfg_ioremap(&pci_mmcfg_config[i]);
if (!pci_mmcfg_virt[i].virt) {
cfg = &pci_mmcfg_config[i];
cfg->virt = mcfg_ioremap(cfg);
if (!cfg->virt) {
printk(KERN_ERR "PCI: Cannot map mmconfig aperture for "
"segment %d\n",
pci_mmcfg_config[i].segment);
cfg->segment);
pci_mmcfg_arch_free();
return 0;
}
@ -155,18 +143,13 @@ int __init pci_mmcfg_arch_init(void)
void __init pci_mmcfg_arch_free(void)
{
int i;
if (pci_mmcfg_virt == NULL)
return;
struct pci_mmcfg_region *cfg;
for (i = 0; i < pci_mmcfg_config_num; ++i) {
if (pci_mmcfg_virt[i].virt) {
iounmap(pci_mmcfg_virt[i].virt + PCI_MMCFG_BUS_OFFSET(pci_mmcfg_virt[i].cfg->start_bus));
pci_mmcfg_virt[i].virt = NULL;
pci_mmcfg_virt[i].cfg = NULL;
cfg = &pci_mmcfg_config[i];
if (cfg->virt) {
iounmap(cfg->virt + PCI_MMCFG_BUS_OFFSET(cfg->start_bus));
cfg->virt = NULL;
}
}
kfree(pci_mmcfg_virt);
pci_mmcfg_virt = NULL;
}