Messages in this thread Patch in this message | | | Date | Mon, 14 Jan 2008 13:37:49 -0800 | From | Yinghai Lu <> | Subject | [PATCH 3/3] x86_64: set cfg_size for AMD Family 10h in case MMCONFIG is used. |
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[PATCH 3/3] x86_64: set cfg_size for AMD Family 10h in case MMCONFIG is used.
reuse pci_cfg_space_size but skip check pci express and pci-x CAP ID.
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
=================================================================== Index: linux-2.6/arch/x86/pci/fixup.c =================================================================== --- linux-2.6.orig/arch/x86/pci/fixup.c +++ linux-2.6/arch/x86/pci/fixup.c @@ -491,3 +491,17 @@ static void __devinit pci_siemens_interr } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015, pci_siemens_interrupt_controller); + +/* + * Regular PCI devices have 256 bytes, but AMD Family 10h Opteron ext config + * have 4096 bytes. Even if the device is capable, that doesn't mean we can + * access it. Maybe we don't have a way to generate extended config space + * accesses. So check it + */ +static void fam10h_pci_cfg_space_size(struct pci_dev *dev) +{ + dev->cfg_size = pci_cfg_space_size_ext(dev, 0); +} + +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_ANY_ID, + fam10h_pci_cfg_space_size); Index: linux-2.6/drivers/pci/probe.c =================================================================== --- linux-2.6.orig/drivers/pci/probe.c +++ linux-2.6/drivers/pci/probe.c @@ -838,11 +838,14 @@ static void set_pcie_port_type(struct pc * reading the dword at 0x100 which must either be 0 or a valid extended * capability header. */ -int pci_cfg_space_size(struct pci_dev *dev) +int pci_cfg_space_size_ext(struct pci_dev *dev, unsigned check_exp_pcix) { int pos; u32 status; + if (!check_exp_pcix) + goto skip; + pos = pci_find_capability(dev, PCI_CAP_ID_EXP); if (!pos) { pos = pci_find_capability(dev, PCI_CAP_ID_PCIX); @@ -854,6 +857,7 @@ int pci_cfg_space_size(struct pci_dev *d goto fail; } + skip: if (pci_read_config_dword(dev, 256, &status) != PCIBIOS_SUCCESSFUL) goto fail; if (status == 0xffffffff) @@ -865,6 +869,11 @@ int pci_cfg_space_size(struct pci_dev *d return PCI_CFG_SPACE_SIZE; } +int pci_cfg_space_size(struct pci_dev *dev) +{ + return pci_cfg_space_size_ext(dev, 1); +} + static void pci_release_bus_bridge_dev(struct device *dev) { kfree(dev); Index: linux-2.6/include/linux/pci.h =================================================================== --- linux-2.6.orig/include/linux/pci.h +++ linux-2.6/include/linux/pci.h @@ -639,6 +639,7 @@ int pci_scan_bridge(struct pci_bus *bus, void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *), void *userdata); +int pci_cfg_space_size_ext(struct pci_dev *dev, unsigned check_exp_pcix); int pci_cfg_space_size(struct pci_dev *dev); unsigned char pci_bus_max_busnr(struct pci_bus* bus);
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