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| author | Robert Richter <robert.richter@amd.com> | 2007-09-03 10:17:39 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-06-02 11:51:19 +0200 |
| commit | 831d991821daedd4839073dbca55514432ef1768 (patch) | |
| tree | f3b9772709fd948c5df7b3e0535d9f62737e7702 /arch/x86/pci/direct.c | |
| parent | x86: fix overlong line in arch/x86/kernel/cpu/amd_64.c (diff) | |
| download | linux-831d991821daedd4839073dbca55514432ef1768.tar.xz linux-831d991821daedd4839073dbca55514432ef1768.zip | |
x86: add PCI extended config space access for AMD Barcelona
This patch implements PCI extended configuration space access for
AMD's Barcelona CPUs. It extends the method using CF8/CFC IO
addresses. An x86 capability bit has been introduced that is set for
CPUs supporting PCI extended config space accesses.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/pci/direct.c')
| -rw-r--r-- | arch/x86/pci/direct.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/arch/x86/pci/direct.c b/arch/x86/pci/direct.c index 21d1e0e0d535..27d61b63def6 100644 --- a/arch/x86/pci/direct.c +++ b/arch/x86/pci/direct.c @@ -8,18 +8,21 @@ #include "pci.h" /* - * Functions for accessing PCI configuration space with type 1 accesses + * Functions for accessing PCI base (first 256 bytes) and extended + * (4096 bytes per PCI function) configuration space with type 1 + * accesses. */ #define PCI_CONF1_ADDRESS(bus, devfn, reg) \ - (0x80000000 | (bus << 16) | (devfn << 8) | (reg & ~3)) + (0x80000000 | ((reg & 0xF00) << 16) | (bus << 16) \ + | (devfn << 8) | (reg & 0xFC)) static int pci_conf1_read(unsigned int seg, unsigned int bus, unsigned int devfn, int reg, int len, u32 *value) { unsigned long flags; - if ((bus > 255) || (devfn > 255) || (reg > 255)) { + if ((bus > 255) || (devfn > 255) || (reg > 4095)) { *value = -1; return -EINVAL; } @@ -50,7 +53,7 @@ static int pci_conf1_write(unsigned int seg, unsigned int bus, { unsigned long flags; - if ((bus > 255) || (devfn > 255) || (reg > 255)) + if ((bus > 255) || (devfn > 255) || (reg > 4095)) return -EINVAL; spin_lock_irqsave(&pci_config_lock, flags); @@ -260,10 +263,16 @@ void __init pci_direct_init(int type) return; printk(KERN_INFO "PCI: Using configuration type %d for base access\n", type); - if (type == 1) + if (type == 1) { raw_pci_ops = &pci_direct_conf1; - else + if (!raw_pci_ext_ops && cpu_has_pci_ext_cfg) { + printk(KERN_INFO "PCI: Using configuration type 1 " + "for extended access\n"); + raw_pci_ext_ops = &pci_direct_conf1; + } + } else { raw_pci_ops = &pci_direct_conf2; + } } int __init pci_direct_probe(void) |