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 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
