diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/pci/mmconfig_32.c')
-rw-r--r-- | ANDROID_3.4.5/arch/x86/pci/mmconfig_32.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/ANDROID_3.4.5/arch/x86/pci/mmconfig_32.c b/ANDROID_3.4.5/arch/x86/pci/mmconfig_32.c deleted file mode 100644 index 5372e868..00000000 --- a/ANDROID_3.4.5/arch/x86/pci/mmconfig_32.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * Copyright (C) 2004 Matthew Wilcox <matthew@wil.cx> - * Copyright (C) 2004 Intel Corp. - * - * This code is released under the GNU General Public License version 2. - */ - -/* - * mmconfig.c - Low-level direct PCI config space access via MMCONFIG - */ - -#include <linux/pci.h> -#include <linux/init.h> -#include <asm/e820.h> -#include <asm/pci_x86.h> -#include <acpi/acpi.h> - -/* Assume systems with more busses have correct MCFG */ -#define mmcfg_virt_addr ((void __iomem *) fix_to_virt(FIX_PCIE_MCFG)) - -/* The base address of the last MMCONFIG device accessed */ -static u32 mmcfg_last_accessed_device; -static int mmcfg_last_accessed_cpu; - -/* - * Functions for accessing PCI configuration space with MMCONFIG accesses - */ -static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn) -{ - struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus); - - if (cfg) - return cfg->address; - return 0; -} - -/* - * This is always called under pci_config_lock - */ -static void pci_exp_set_dev_base(unsigned int base, int bus, int devfn) -{ - u32 dev_base = base | PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12); - int cpu = smp_processor_id(); - if (dev_base != mmcfg_last_accessed_device || - cpu != mmcfg_last_accessed_cpu) { - mmcfg_last_accessed_device = dev_base; - mmcfg_last_accessed_cpu = cpu; - set_fixmap_nocache(FIX_PCIE_MCFG, dev_base); - } -} - -static int pci_mmcfg_read(unsigned int seg, unsigned int bus, - unsigned int devfn, int reg, int len, u32 *value) -{ - unsigned long flags; - u32 base; - - if ((bus > 255) || (devfn > 255) || (reg > 4095)) { -err: *value = -1; - return -EINVAL; - } - - base = get_base_addr(seg, bus, devfn); - if (!base) - goto err; - - raw_spin_lock_irqsave(&pci_config_lock, flags); - - pci_exp_set_dev_base(base, bus, devfn); - - switch (len) { - case 1: - *value = mmio_config_readb(mmcfg_virt_addr + reg); - break; - case 2: - *value = mmio_config_readw(mmcfg_virt_addr + reg); - break; - case 4: - *value = mmio_config_readl(mmcfg_virt_addr + reg); - break; - } - raw_spin_unlock_irqrestore(&pci_config_lock, flags); - - return 0; -} - -static int pci_mmcfg_write(unsigned int seg, unsigned int bus, - unsigned int devfn, int reg, int len, u32 value) -{ - unsigned long flags; - u32 base; - - if ((bus > 255) || (devfn > 255) || (reg > 4095)) - return -EINVAL; - - base = get_base_addr(seg, bus, devfn); - if (!base) - return -EINVAL; - - raw_spin_lock_irqsave(&pci_config_lock, flags); - - pci_exp_set_dev_base(base, bus, devfn); - - switch (len) { - case 1: - mmio_config_writeb(mmcfg_virt_addr + reg, value); - break; - case 2: - mmio_config_writew(mmcfg_virt_addr + reg, value); - break; - case 4: - mmio_config_writel(mmcfg_virt_addr + reg, value); - break; - } - raw_spin_unlock_irqrestore(&pci_config_lock, flags); - - return 0; -} - -static const struct pci_raw_ops pci_mmcfg = { - .read = pci_mmcfg_read, - .write = pci_mmcfg_write, -}; - -int __init pci_mmcfg_arch_init(void) -{ - printk(KERN_INFO "PCI: Using MMCONFIG for extended config space\n"); - raw_pci_ext_ops = &pci_mmcfg; - return 1; -} - -void __init pci_mmcfg_arch_free(void) -{ -} |