These patches convert the table of MMCONFIG regions to a list, to make it
easier to support addition and removal of regions at run-time.
MMCONFIG management will need to be more dynamic to support _CBA (a PCI host
bridge ACPI method that reports the MMCONFIG address), because we will discover
_CBA when we claim the host bridge, not in the current pci_arch_init() path.
The PCI Firmware Spec requires BIOS to use _CBA, not MCFG, to report MMCONFIG
regions of hot-pluggable host bridges. Therefore, if the hardware and firmware
support host bridge hotplug, we will encounter _CBA even if Linux itself
doesn't support hotplug.
I changed some printk and resource name text, but otherwise, except for any
implementation errors I made, this series should have no functional change.
Changes from v1 to v2:
- update resource name when changing bus number range (Yinghai, in 11/18)
---
Bjorn Helgaas (18):
x86/PCI: MMCONFIG: remove unused definitions
x86/PCI: MMCONFIG: count MCFG structures with local variable
x86/PCI: MMCONFIG: step through MCFG table, not pci_mmcfg_config[]
x86/PCI: MMCONFIG: centralize MCFG structure management
x86/PCI: MMCONFIG: simplify tests for empty pci_mmcfg_config table
x86/PCI: MMCONFIG: reject MMCONFIG apertures at address zero
x86/PCI: MMCONFIG: add PCI_MMCFG_BUS_OFFSET() to factor common expression
x86/PCI: MMCONFIG: use a private structure rather than the ACPI MCFG one
x86/PCI: MMCONFIG: rename pci_mmcfg_region structure members
x86/PCI: MMCONFIG: use pointer to simplify pci_mmcfg_config[] structure access
x86/PCI: MMCONFIG: add resource to struct pci_mmcfg_region
x86/PCI: MMCONFIG: trivial is_mmconf_reserved() interface simplification
x86/PCI: MMCONFIG: add virtual address to struct pci_mmcfg_region
x86/PCI: MMCONFIG: remove typeof so we can use a list
x86/PCI: MMCONFIG: manage pci_mmcfg_region as a list, not a table
x86/PCI: MMCONFIG: add pci_mmconfig_remove() to remove MMCONFIG region
x86/PCI: MMCONFIG: clean up printks
x86/PCI: MMCONFIG: add lookup function
arch/x86/include/asm/pci_x86.h | 20 ++
arch/x86/pci/mmconfig-shared.c | 331 +++++++++++++++++++---------------------
arch/x86/pci/mmconfig_32.c | 16 --
arch/x86/pci/mmconfig_64.c | 88 +++--------
4 files changed, 201 insertions(+), 254 deletions(-)
--
Bjorn
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