From e32c44c8349dbdf7712a7d868fdbff75599c9005 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:13:36 +0200 Subject: i386: prepare shared pci/mmconfig.c Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/i386/pci/mmconfig.c | 148 ----------------------------------------------- 1 file changed, 148 deletions(-) delete mode 100644 arch/i386/pci/mmconfig.c (limited to 'arch/i386/pci/mmconfig.c') diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c deleted file mode 100644 index 1bf5816..0000000 --- a/arch/i386/pci/mmconfig.c +++ /dev/null @@ -1,148 +0,0 @@ -/* - * Copyright (C) 2004 Matthew Wilcox - * 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 -#include -#include -#include -#include "pci.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 acpi_mcfg_allocation *cfg; - int cfg_num; - - if (seg == 0 && bus < PCI_MMCFG_MAX_CHECK_BUS && - test_bit(PCI_SLOT(devfn) + 32*bus, pci_mmcfg_fallback_slots)) - return 0; - - for (cfg_num = 0; cfg_num < pci_mmcfg_config_num; cfg_num++) { - cfg = &pci_mmcfg_config[cfg_num]; - if (cfg->pci_segment == seg && - (cfg->start_bus_number <= bus) && - (cfg->end_bus_number >= bus)) - return cfg->address; - } - - /* Fall back to type 0 */ - 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 | (bus << 20) | (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)) { - *value = -1; - return -EINVAL; - } - - base = get_base_addr(seg, bus, devfn); - if (!base) - return pci_conf1_read(seg,bus,devfn,reg,len,value); - - 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; - } - 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 pci_conf1_write(seg,bus,devfn,reg,len,value); - - 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; - } - spin_unlock_irqrestore(&pci_config_lock, flags); - - return 0; -} - -static struct pci_raw_ops pci_mmcfg = { - .read = pci_mmcfg_read, - .write = pci_mmcfg_write, -}; - -int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus, - unsigned int devfn) -{ - return get_base_addr(seg, bus, devfn) != 0; -} - -int __init pci_mmcfg_arch_init(void) -{ - printk(KERN_INFO "PCI: Using MMCONFIG\n"); - raw_pci_ops = &pci_mmcfg; - return 1; -} -- cgit v1.1