From 3f0f5503926f7447615f083c2d57545a83b6357c Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 13 Nov 2009 17:34:39 -0700 Subject: [PATCH] x86/PCI: MMCONFIG: add virtual address to struct pci_mmcfg_region 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 Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- arch/x86/include/asm/pci_x86.h | 1 + arch/x86/pci/mmconfig_64.c | 45 +++++++++++----------------------- 2 files changed, 15 insertions(+), 31 deletions(-) diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h index a6d42c10b01..7aa2ed8f25a 100644 --- a/arch/x86/include/asm/pci_x86.h +++ b/arch/x86/include/asm/pci_x86.h @@ -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; diff --git a/arch/x86/pci/mmconfig_64.c b/arch/x86/pci/mmconfig_64.c index fdf08f97131..78fa05c6c04 100644 --- a/arch/x86/pci/mmconfig_64.c +++ b/arch/x86/pci/mmconfig_64.c @@ -12,24 +12,17 @@ #include #include -/* 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; } -- 2.39.3