linux/drivers/pci
Alex Williamson 51e5373879 PCI: Add flag for devices that don't reset on D3hot->D0 transition
Per the PCI Power Management spec r1.2, sec 3.2.4, a device that advertises
No_Soft_Reset == 0 in the PMCSR register (reported by lspci as "NoSoftRst-")
should perform an internal reset when transitioning from D3hot to D0 via
software control.  Configuration context is lost and the device requires a
full reinitialization sequence.

Unfortunately the definition of "internal reset", beyond the application of
the configuration context, is largely left to the interpretation of the
specific device.  Some devices don't seem to perform an "internal reset"
even if they report No_Soft_Reset == 0.

We still need to honor the PCI specification and restore PCI config context
in the event that we do a PM reset, so we don't cache and modify the
PCI_PM_CTRL_NO_SOFT_RESET bit for the device, but for interfaces where the
intention is to reset the device, like pci_reset_function(), we need a
mechanism to flag that PM reset (a D3hot->D0 transition) doesn't perform
any significant "internal reset" of the device.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2015-01-16 10:06:48 -06:00
..
host Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
hotplug Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-19 14:02:02 -08:00
pcie PCI / PM: Drop CONFIG_PM_RUNTIME from the PCI core 2014-12-04 00:50:33 +01:00
access.c PCI: Apply _HPX Link Control settings to all devices with a link 2014-11-13 15:43:42 -07:00
ats.c PCI: Removed unused parts of Page Request Interface support 2014-01-10 14:00:47 -07:00
bus.c PCI: Move EXPORT_SYMBOL so it immediately follows function/variable 2014-06-10 13:36:10 -06:00
host-bridge.c PCI: Remove unnecessary includes of <linux/init.h> 2014-04-14 16:12:37 -06:00
hotplug-pci.c PCI: Remove unnecessary __ref annotations 2014-04-29 17:36:44 -06:00
htirq.c PCI changes for the v3.16 merge window (part 2): 2014-06-12 13:20:24 -07:00
iov.c PCI: Remove fixed parameter in pci_iov_resource_bar() 2014-11-19 15:07:43 -07:00
irq.c PCI: Fix whitespace, capitalization, and spelling errors 2013-11-14 11:28:18 -07:00
Kconfig x86, irq: Make MSI and HT_IRQ indepenent of X86_IO_APIC 2014-12-16 14:08:17 +01:00
Makefile PCI: Remove PCI ioapic driver 2014-12-16 14:08:14 +01:00
msi.c Merge branch 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:01:01 -08:00
of.c
pci-acpi.c PCI: Delete unnecessary NULL pointer checks 2014-11-10 21:02:17 -07:00
pci-driver.c PCI / PM: Drop CONFIG_PM_RUNTIME from the PCI core 2014-12-04 00:50:33 +01:00
pci-label.c ACPI / PCI: Fix sysfs acpi_index and label errors 2014-07-02 15:27:08 -06:00
pci-stub.c PCI: Whitespace cleanup 2014-06-10 20:20:19 -06:00
pci-sysfs.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
pci.c PCI: Add flag for devices that don't reset on D3hot->D0 transition 2015-01-16 10:06:48 -06:00
pci.h PCI changes for the v3.19 merge window: 2014-12-10 20:58:52 -08:00
probe.c PCI changes for the v3.19 merge window: 2014-12-10 20:58:52 -08:00
proc.c PCI: Whitespace cleanup 2014-06-10 20:20:19 -06:00
quirks.c PCI: Mark Atheros AR93xx to avoid bus reset 2015-01-16 10:04:38 -06:00
remove.c Revert "PCI: Remove from bus_list and release resources in pci_release_dev()" 2014-02-01 10:24:31 -08:00
rom.c PCI: Whitespace cleanup 2014-06-10 20:20:19 -06:00
search.c PCI: Delete unnecessary NULL pointer checks 2014-11-10 21:02:17 -07:00
setup-bus.c PCI: Add missing MEM_64 mask in pci_assign_unassigned_bridge_resources() 2014-09-30 13:56:46 -06:00
setup-irq.c PCI: Whitespace cleanup 2014-06-10 20:20:19 -06:00
setup-res.c PCI: Tidy resource assignment messages 2014-07-08 16:29:08 -06:00
slot.c VERIFY_OCTAL_PERMISSIONS: stricter checking for sysfs perms. 2014-03-24 12:21:00 +10:30
syscall.c PCI: Whitespace cleanup 2014-06-10 20:20:19 -06:00
vc.c PCI: Rename PCI_VC_PORT_REG1/2 to PCI_VC_PORT_CAP1/2 2013-12-17 17:49:39 -07:00
vpd.c
xen-pcifront.c Merge branches 'pci/enumeration', 'pci/hotplug', 'pci/misc', 'pci/numa' and 'pci/virtualization' into next 2014-11-19 15:10:33 -07:00