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Kai-Heng Feng 65db04053e PCI: Coalesce host bridge contiguous apertures 
Built-in graphics on HP EliteDesk 805 G6 doesn't work because graphics
can't get the BAR it needs:

  pci_bus 0000:00: root bus resource [mem 0x10020200000-0x100303fffff window]
  pci_bus 0000:00: root bus resource [mem 0x10030400000-0x100401fffff window]

  pci 0000:00:08.1:   bridge window [mem 0xd2000000-0xd23fffff]
  pci 0000:00:08.1:   bridge window [mem 0x10030000000-0x100401fffff 64bit pref]
  pci 0000:00:08.1: can't claim BAR 15 [mem 0x10030000000-0x100401fffff 64bit pref]: no compatible bridge window
  pci 0000:00:08.1: [mem 0x10030000000-0x100401fffff 64bit pref] clipped to [mem 0x10030000000-0x100303fffff 64bit pref]
  pci 0000:00:08.1:   bridge window [mem 0x10030000000-0x100303fffff 64bit pref]
  pci 0000:07:00.0: can't claim BAR 0 [mem 0x10030000000-0x1003fffffff 64bit pref]: no compatible bridge window
  pci 0000:07:00.0: can't claim BAR 2 [mem 0x10040000000-0x100401fffff 64bit pref]: no compatible bridge window

However, the root bus has two contiguous apertures that can contain the
child resource requested.

Coalesce contiguous apertures so we can allocate from the entire contiguous
region.

[bhelgaas: fold in https://lore.kernel.org/r/20210528170242.1564038-1-kai.heng.feng@canonical.com]
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=212013
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20210401131252.531935-1-kai.heng.feng@canonical.com
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2021-06-04 15:25:04 -05:00
..
controller
pci-v5.13-changes
2021-05-05 13:24:11 -07:00
endpoint
Merge branch 'remotes/lorenzo/pci/endpoint'
2021-05-04 10:43:27 -05:00
hotplug
more s390 updates for 5.13 merge window
2021-05-06 14:39:50 -07:00
pcie
Merge branch 'pci/kernel-doc'
2021-05-04 10:43:24 -05:00
switch
PCI: switchtec: Add missing __iomem tag to fix sparse warnings
2020-07-31 11:23:45 -05:00
access.c
Merge branch 'pci/misc'
2020-08-05 18:24:16 -05:00
ats.c
PCI: Fix kernel-doc errors
2021-03-11 17:37:20 -06:00
bus.c
PCI: Add device even if driver attach failed
2020-07-07 17:33:41 -05:00
ecam.c
PCI: Unify ECAM constants in native PCI Express drivers
2020-12-10 14:55:49 -06:00
host-bridge.c
…
iov.c
PCI/IOV: Add sysfs MSI-X vector assignment interface
2021-04-04 10:26:30 +03:00
irq.c
PCI: Remove unused pci_lost_interrupt()
2020-07-29 14:25:18 -05:00
Kconfig
pci-v5.10-changes
2020-10-22 12:41:00 -07:00
Makefile
PCI: Apply CONFIG_PCI_DEBUG to entire drivers/pci hierarchy
2021-02-09 15:10:20 -06:00
mmap.c
…
msi.c
PCI/MSI: Document the various ways of ending up with NO_MSI
2021-04-20 14:11:22 +01:00
of.c
PCI: Fix kernel-doc errors
2021-03-11 17:37:20 -06:00
p2pdma.c
RDMA 5.11 pull request
2020-12-16 13:42:26 -08:00
pci-acpi.c
PCI/ACPI: Fix acpi_pci_set_power_state() debug message
2021-04-01 14:54:43 -05:00
pci-bridge-emul.c
PCI: pci-bridge-emul: Fix array overruns, improve safety
2021-02-17 17:25:31 -06:00
pci-bridge-emul.h
…
pci-driver.c
Merge branch 'pci/misc'
2020-12-15 15:11:08 -06:00
pci-label.c
PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions
2021-04-29 10:07:31 -05:00
pci-mid.c
PCI: intel-mid: Convert to new X86 CPU match macros
2020-03-24 21:35:06 +01:00
pci-pf-stub.c
PCI/IOV: Simplify pci-pf-stub with module_pci_driver()
2020-09-17 12:40:20 -05:00
pci-stub.c
…
pci-sysfs.c
pci-v5.13-changes
2021-05-05 13:24:11 -07:00
pci.c
pci-v5.13-changes
2021-05-05 13:24:11 -07:00
pci.h
pci-v5.13-changes
2021-05-05 13:24:11 -07:00
probe.c
PCI: Coalesce host bridge contiguous apertures
2021-06-04 15:25:04 -05:00
proc.c
PCI: Revoke mappings like devmem
2021-02-11 15:59:19 +01:00
quirks.c
Merge branch 'remotes/lorenzo/pci/msi'
2021-05-04 10:43:30 -05:00
remove.c
PCI/sysfs: Convert "reset" to static attribute
2021-04-27 17:53:20 -05:00
rom.c
PCI: Use ioremap(), not phys_to_virt() for platform ROM
2020-03-30 09:52:23 -05:00
search.c
PCI: Remove WARN_ON(in_interrupt())
2021-02-10 16:46:29 -06:00
setup-bus.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
setup-irq.c
…
setup-res.c
PCI: Decline to resize resources if boot config must be preserved
2021-01-12 16:39:52 -06:00
slot.c
Merge branch 'pci/misc'
2020-12-15 15:11:08 -06:00
syscall.c
PCI: Align checking of syscall user config accessors
2021-01-27 10:41:59 -06:00
vc.c
PCI: Fix kerneldoc warnings
2020-08-05 18:23:14 -05:00
vpd.c
Merge branch 'pci/sysfs'
2021-05-04 10:43:23 -05:00
xen-pcifront.c
swiotlb: remove swiotlb_nr_tbl
2021-03-19 04:58:25 +00:00