mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
![Jayachandran C](/assets/img/avatar_default.png)
Add config option PCI_ECAM and file drivers/pci/ecam.c to provide generic functions for accessing memory-mapped PCI config space. The API is defined in drivers/pci/ecam.h and is written to replace the API in drivers/pci/host/pci-host-common.h. The file defines a new 'struct pci_config_window' to hold the information related to a PCI config area and its mapping. This structure is expected to be used as sysdata for controllers that have ECAM based mapping. Helper functions are provided to setup the mapping, free the mapping and to implement the map_bus method in 'struct pci_ops' Signed-off-by: Jayachandran C <jchandra@broadcom.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
135 lines
3.7 KiB
Text
135 lines
3.7 KiB
Text
#
|
|
# PCI configuration
|
|
#
|
|
|
|
source "drivers/pci/pcie/Kconfig"
|
|
|
|
config PCI_BUS_ADDR_T_64BIT
|
|
def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT)
|
|
depends on PCI
|
|
|
|
config PCI_MSI
|
|
bool "Message Signaled Interrupts (MSI and MSI-X)"
|
|
depends on PCI
|
|
select GENERIC_MSI_IRQ
|
|
help
|
|
This allows device drivers to enable MSI (Message Signaled
|
|
Interrupts). Message Signaled Interrupts enable a device to
|
|
generate an interrupt using an inbound Memory Write on its
|
|
PCI bus instead of asserting a device IRQ pin.
|
|
|
|
Use of PCI MSI interrupts can be disabled at kernel boot time
|
|
by using the 'pci=nomsi' option. This disables MSI for the
|
|
entire system.
|
|
|
|
If you don't know what to do here, say Y.
|
|
|
|
config PCI_MSI_IRQ_DOMAIN
|
|
bool
|
|
depends on PCI_MSI
|
|
select GENERIC_MSI_IRQ_DOMAIN
|
|
|
|
config PCI_DEBUG
|
|
bool "PCI Debugging"
|
|
depends on PCI && DEBUG_KERNEL
|
|
help
|
|
Say Y here if you want the PCI core to produce a bunch of debug
|
|
messages to the system log. Select this if you are having a
|
|
problem with PCI support and want to see more of what is going on.
|
|
|
|
When in doubt, say N.
|
|
|
|
config PCI_REALLOC_ENABLE_AUTO
|
|
bool "Enable PCI resource re-allocation detection"
|
|
depends on PCI
|
|
help
|
|
Say Y here if you want the PCI core to detect if PCI resource
|
|
re-allocation needs to be enabled. You can always use pci=realloc=on
|
|
or pci=realloc=off to override it. Note this feature is a no-op
|
|
unless PCI_IOV support is also enabled; in that case it will
|
|
automatically re-allocate PCI resources if SR-IOV BARs have not
|
|
been allocated by the BIOS.
|
|
|
|
When in doubt, say N.
|
|
|
|
config PCI_STUB
|
|
tristate "PCI Stub driver"
|
|
depends on PCI
|
|
help
|
|
Say Y or M here if you want be able to reserve a PCI device
|
|
when it is going to be assigned to a guest operating system.
|
|
|
|
When in doubt, say N.
|
|
|
|
config XEN_PCIDEV_FRONTEND
|
|
tristate "Xen PCI Frontend"
|
|
depends on PCI && X86 && XEN
|
|
select PCI_XEN
|
|
select XEN_XENBUS_FRONTEND
|
|
default y
|
|
help
|
|
The PCI device frontend driver allows the kernel to import arbitrary
|
|
PCI devices from a PCI backend to support PCI driver domains.
|
|
|
|
config HT_IRQ
|
|
bool "Interrupts on hypertransport devices"
|
|
default y
|
|
depends on PCI && X86_LOCAL_APIC
|
|
help
|
|
This allows native hypertransport devices to use interrupts.
|
|
|
|
If unsure say Y.
|
|
|
|
config PCI_ATS
|
|
bool
|
|
|
|
config PCI_ECAM
|
|
bool
|
|
|
|
config PCI_IOV
|
|
bool "PCI IOV support"
|
|
depends on PCI
|
|
select PCI_ATS
|
|
help
|
|
I/O Virtualization is a PCI feature supported by some devices
|
|
which allows them to create virtual devices which share their
|
|
physical resources.
|
|
|
|
If unsure, say N.
|
|
|
|
config PCI_PRI
|
|
bool "PCI PRI support"
|
|
depends on PCI
|
|
select PCI_ATS
|
|
help
|
|
PRI is the PCI Page Request Interface. It allows PCI devices that are
|
|
behind an IOMMU to recover from page faults.
|
|
|
|
If unsure, say N.
|
|
|
|
config PCI_PASID
|
|
bool "PCI PASID support"
|
|
depends on PCI
|
|
select PCI_ATS
|
|
help
|
|
Process Address Space Identifiers (PASIDs) can be used by PCI devices
|
|
to access more than one IO address space at the same time. To make
|
|
use of this feature an IOMMU is required which also supports PASIDs.
|
|
Select this option if you have such an IOMMU and want to compile the
|
|
driver for it into your kernel.
|
|
|
|
If unsure, say N.
|
|
|
|
config PCI_LABEL
|
|
def_bool y if (DMI || ACPI)
|
|
select NLS
|
|
|
|
config PCI_HYPERV
|
|
tristate "Hyper-V PCI Frontend"
|
|
depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
|
|
help
|
|
The PCI device frontend driver allows the kernel to import arbitrary
|
|
PCI devices from a PCI backend to support PCI driver domains.
|
|
|
|
source "drivers/pci/hotplug/Kconfig"
|
|
source "drivers/pci/host/Kconfig"
|