[PATCH 00/36] PCI: Resource allocation cleanup for v4.3

[Yinghai Lu <yinghai@kernel.org>]

Hi,

After 5b28541552ef (PCI: Restrict 64-bit prefetchable bridge windows
to 64-bit resources), we have several reports on resource allocation
failure, and we try to fix the problem with resource clip, and get
more problems.

One is realloc fail with two graphics cards above 4G.
One is from sparc that have problem with clip as we don't parse
mem64 for it.

Other report is about pci remove/rescan does not work on some setup
when BIOS tend to allocate small bus size.

This patchset enhance resource allocation to address those problems.
1. optimize bus mmio alignment calculation.
2. optimize bus mmio optional alignment calculation.
3. add support for alt size to prefer small bus size to small bus alignment.
   when we have small resource window on parent bridges.
4. treat ROM bar as optional resource.
5. during allocation, will pick up just fit resource.
6. parse MEM64 for sparc and other system with OF.
7. treat non-pref mmio64 if parent bridges are all pcie.
8. restore old pref allocation logic if hostbridge does not support mmio64 really.
9. don't realloc resource if device firmware does not support bar change.
10. add pci=assign_pref_bars to clear and assign pref bars.
11. don't clear resource when allocation fails.

I put latest copy at:
  git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci-v4.3-next

That is based on kind of v4.2-rc1 on 07/06/2015.

Please give it a try on your setup.

Thanks

Yinghai


Yinghai Lu (36):
  PCI: Cleanup res_to_dev_res() printout for addon resources
  PCI: Reuse res_to_dev_res in reassign_resources_sorted
  PCI: Use correct align for optional only resources during sorting for resource allocation
  PCI: Optimize bus align/size calculation during sizing
  PCI: Optimize bus align/size calculation for optional during sizing
  PCI: Reorder resources list for must/optional resources
  PCI: Remove duplicated code for resource sorting
  PCI: Rename pdev_sort_resources to pdev_check_resources
  PCI: Treat ROM resource as optional during realloc
  PCI: Add debug printout during releasing partial must/optinal assigned resources
  PCI: Simplify res reference using in __assign_resourcs_sorted
  PCI: Separate realloc list checking after allocation
  PCI: Add __add_to_list()
  PCI: Separate must_add assigning to another function
  PCI: Bail out early if there is no addon
  PCI: Add alt_size allocation support
  PCI: Add support for more than two alt_size under same bridge
  PCI: Better support for two alt_size
  resources: Split out __allocate_resource()
  resources: Make allocate_resource return just fit resource
  PCI: Check pref compatible bit for mem64 resource of pcie device
  PCI: Only treat non-pef mmio64 as pref if all bridges has MEM_64
  PCI: Add has_mem64 for host_bridge
  PCI: Only treat non-pef mmio64 as pref if host-bridge has_mem64
  PCI: Restore pref mmio allocation logic for hostbridge without mmio64
  sparc/PCI: Add mem64 resource parsing for root bus
  sparc/PCI: Add IORESOURCE_MEM_64 for 64-bit resource in of parsing
  powerpc/PCI: Add IORESOURCE_MEM_64 for 64-bit resource in of parsing
  of/PCI: Add IORESOURCE_MEM_64 for 64-bit resource
  PCI: Treat optional as must in first try for bridge rescan
  PCI: Get new realloc size for bridge for last try
  PCI: Don't release sibiling bridge resources during hotplug
  PCI: Don't release fixed resource for realloc
  PCI: Set resource to FIXED for lsi devices
  PCI, x86: Add pci=assign_pref_bars to re-allocate pref bars
  PCI: Don't set flags to 0 when assign resource fail

 arch/powerpc/kernel/pci_of_scan.c  |    4 +-
 arch/sparc/kernel/of_device_32.c   |    5 +-
 arch/sparc/kernel/of_device_64.c   |    5 +-
 arch/sparc/kernel/pci.c            |    7 +-
 arch/sparc/kernel/pci_common.c     |   15 +-
 arch/sparc/kernel/pci_impl.h       |    1 +
 arch/x86/include/asm/pci_x86.h     |    1 +
 arch/x86/pci/common.c              |    3 +
 arch/x86/pci/i386.c                |   56 +-
 drivers/of/address.c               |    4 +-
 drivers/pci/bus.c                  |    4 +-
 drivers/pci/hotplug/acpiphp_glue.c |    1 +
 drivers/pci/pci.c                  |    3 +-
 drivers/pci/pci.h                  |    4 +
 drivers/pci/probe.c                |   42 ++
 drivers/pci/quirks.c               |   20 +
 drivers/pci/setup-bus.c            | 1119 +++++++++++++++++++++++++++---------
 drivers/pci/setup-res.c            |   24 +-
 include/linux/ioport.h             |    2 +-
 include/linux/pci.h                |    2 +
 kernel/resource.c                  |  175 ++++--
 21 files changed, 1164 insertions(+), 333 deletions(-)

-- 
1.8.4.5