Messages in this thread | | | Subject | [PATCH v2 0/7] resource, PNPACPI: add bus number and window support | From | Bjorn Helgaas <> | Date | Fri, 05 Mar 2010 10:47:21 -0700 |
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These patches add a new resource type, IORESOURCE_BUS, a new resource flag, IORESOURCE_WINDOW, and PNPACPI support that uses them.
IORESOURCE_BUS is for PCI bus number ranges. For bridge devices, ACPI reports secondary bus number ranges in _CRS descriptors, but we currently ignore them. Adding this resource type will allow us to handle those descriptors in PNPACPI.
IORESOURCE_WINDOW is also for bridges: ACPI reports the regions that the bridge forwards to its secondary bus. We have _CRS parsing code in pci_root.c that handles these window descriptors, but PNPACPI currently ignores them. Adding this flag bit will allow PNPACPI to deal with the windows correctly.
No drivers use bus or window resources yet, but ultimately, I would like to drop the _CRS parsing code from pci_root.c and rely on PNPACPI to do it for us. The current effect of this series is to change /sys/bus/pnp/.../resources (and "lspnp -v" output) from this:
00:00 PNP0a03 PCI bus state = active
to something like this:
00:00 PNP0a03 PCI bus state = active bus 0x0-0x0 io 0x0-0xcff window io 0x0-0x2cfe window io 0x3b0-0x3bb window io 0x3c0-0x3df window mem 0xf5d00000-0xf6ffffff window mem disabled mem 0xa0000-0xbffff window
Changes from v1 to v2: - Add close quote in vsprintf SPECIAL comment (Randy Dunlap).
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Bjorn Helgaas (7): resource: expand IORESOURCE_TYPE_BITS to make room for bus resource type vsprintf: clarify comments for printf_spec flags vsprintf: move %pR resource printf_specs off the stack resource: add bus number support resource: add window support PNPACPI: add window support PNPACPI: add bus number support
drivers/pnp/base.h | 3 ++ drivers/pnp/interface.c | 7 +++-- drivers/pnp/pnpacpi/rsparser.c | 49 ++++++++++++++++++++++---------- drivers/pnp/resource.c | 27 +++++++++++++++++ drivers/pnp/support.c | 4 ++- include/linux/ioport.h | 18 ++++++------ lib/vsprintf.c | 62 +++++++++++++++++++++++++--------------- 7 files changed, 119 insertions(+), 51 deletions(-)
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