[patch 15/39] PCI/MSI: Get rid of PCI_MSI_IRQ_DOMAIN

Thomas Gleixner
2022-11-11T13:56:06Z

What a zoo:

PCI_MSI
select GENERIC_MSI_IRQ

PCI_MSI_IRQ_DOMAIN
def_bool y
depends on PCI_MSI
select GENERIC_MSI_IRQ_DOMAIN

Ergo PCI_MSI enables PCI_MSI_IRQ_DOMAIN which in turn selects
GENERIC_MSI_IRQ_DOMAIN. So all the dependencies on PCI_MSI_IRQ_DOMAIN are
just an indirection to PCI_MSI.

Match the reality and just admit that PCI_MSI requires
GENERIC_MSI_IRQ_DOMAIN.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/um/drivers/Kconfig | 1
arch/um/include/asm/pci.h | 2 -
arch/x86/Kconfig | 1
arch/x86/include/asm/pci.h | 4 +-
drivers/pci/Kconfig | 8 +----
drivers/pci/controller/Kconfig | 30 +++++++++-----------
drivers/pci/controller/dwc/Kconfig | 48 ++++++++++++++++----------------
drivers/pci/controller/mobiveil/Kconfig | 6 ++--
drivers/pci/msi/Makefile | 2 -
drivers/pci/probe.c | 2 -
include/linux/msi.h | 32 ++++++---------------
11 files changed, 56 insertions(+), 80 deletions(-)

--- a/arch/um/drivers/Kconfig
+++ b/arch/um/drivers/Kconfig
@@ -381,7 +381,6 @@ config UML_PCI_OVER_VIRTIO
select UML_IOMEM_EMULATION
select UML_DMA_EMULATION
select PCI_MSI
- select PCI_MSI_IRQ_DOMAIN
select PCI_LOCKLESS_CONFIG

config UML_PCI_OVER_VIRTIO_DEVICE_ID
--- a/arch/um/include/asm/pci.h
+++ b/arch/um/include/asm/pci.h
@@ -7,7 +7,7 @@
/* Generic PCI */
#include <asm-generic/pci.h>

-#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
+#ifdef CONFIG_PCI_MSI
/*
* This is a bit of an annoying hack, and it assumes we only have
* the virt-pci (if anything). Which is true, but still.
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1109,7 +1109,6 @@ config X86_LOCAL_APIC
def_bool y
depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI
select IRQ_DOMAIN_HIERARCHY
- select PCI_MSI_IRQ_DOMAIN if PCI_MSI

config X86_IO_APIC
def_bool y
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -21,7 +21,7 @@ struct pci_sysdata {
#ifdef CONFIG_X86_64
void *iommu; /* IOMMU private data */
#endif
-#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
+#ifdef CONFIG_PCI_MSI
void *fwnode; /* IRQ domain for MSI assignment */
#endif
#if IS_ENABLED(CONFIG_VMD)
@@ -52,7 +52,7 @@ static inline int pci_proc_domain(struct
}
#endif

-#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
+#ifdef CONFIG_PCI_MSI
static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
{
return to_pci_sysdata(bus)->fwnode;
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -38,6 +38,7 @@ source "drivers/pci/pcie/Kconfig"

config PCI_MSI
bool "Message Signaled Interrupts (MSI and MSI-X)"
+ select GENERIC_MSI_IRQ_DOMAIN
select GENERIC_MSI_IRQ
help
This allows device drivers to enable MSI (Message Signaled
@@ -51,11 +52,6 @@ config PCI_MSI

If you don't know what to do here, say Y.

-config PCI_MSI_IRQ_DOMAIN
- def_bool y
- depends on PCI_MSI
- select GENERIC_MSI_IRQ_DOMAIN
-
config PCI_MSI_ARCH_FALLBACKS
bool

@@ -192,7 +188,7 @@ config PCI_LABEL

config PCI_HYPERV
tristate "Hyper-V PCI Frontend"
- depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && SYSFS
+ depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && SYSFS
select PCI_HYPERV_INTERFACE
help
The PCI device frontend driver allows the kernel to import arbitrary
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -19,7 +19,7 @@ config PCI_AARDVARK
tristate "Aardvark PCIe controller"
depends on (ARCH_MVEBU && ARM64) || COMPILE_TEST
depends on OF
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCI_BRIDGE_EMUL
help
Add support for Aardvark 64bit PCIe Host Controller. This
@@ -29,7 +29,7 @@ config PCI_AARDVARK
config PCIE_XILINX_NWL
bool "NWL PCIe Core"
depends on ARCH_ZYNQMP || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
help
Say 'Y' here if you want kernel support for Xilinx
NWL PCIe controller. The controller can act as Root Port
@@ -53,7 +53,7 @@ config PCI_IXP4XX
config PCI_TEGRA
bool "NVIDIA Tegra PCIe controller"
depends on ARCH_TEGRA || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
help
Say Y here if you want support for the PCIe host controller found
on NVIDIA Tegra SoCs.
@@ -70,7 +70,7 @@ config PCI_RCAR_GEN2
config PCIE_RCAR_HOST
bool "Renesas R-Car PCIe host controller"
depends on ARCH_RENESAS || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
help
Say Y here if you want PCIe controller support on R-Car SoCs in host
mode.
@@ -99,7 +99,7 @@ config PCI_HOST_GENERIC
config PCIE_XILINX
bool "Xilinx AXI PCIe host bridge support"
depends on OF || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
help
Say 'Y' here if you want kernel to support the Xilinx AXI PCIe
Host Bridge driver.
@@ -124,7 +124,7 @@ config PCI_XGENE
config PCI_XGENE_MSI
bool "X-Gene v1 PCIe MSI feature"
depends on PCI_XGENE
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
default y
help
Say Y here if you want PCIe MSI support for the APM X-Gene v1 SoC.
@@ -170,7 +170,7 @@ config PCIE_IPROC_BCMA
config PCIE_IPROC_MSI
bool "Broadcom iProc PCIe MSI support"
depends on PCIE_IPROC_PLATFORM || PCIE_IPROC_BCMA
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
default ARCH_BCM_IPROC
help
Say Y here if you want to enable MSI support for Broadcom's iProc
@@ -186,7 +186,7 @@ config PCIE_ALTERA
config PCIE_ALTERA_MSI
tristate "Altera PCIe MSI feature"
depends on PCIE_ALTERA
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
help
Say Y here if you want PCIe MSI support for the Altera FPGA.
This MSI driver supports Altera MSI to GIC controller IP.
@@ -215,7 +215,7 @@ config PCIE_ROCKCHIP_HOST
tristate "Rockchip PCIe host controller"
depends on ARCH_ROCKCHIP || COMPILE_TEST
depends on OF
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select MFD_SYSCON
select PCIE_ROCKCHIP
help
@@ -239,7 +239,7 @@ config PCIE_MEDIATEK
tristate "MediaTek PCIe controller"
depends on ARCH_AIROHA || ARCH_MEDIATEK || COMPILE_TEST
depends on OF
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
help
Say Y here if you want to enable PCIe controller support on
MediaTek SoCs.
@@ -247,7 +247,7 @@ config PCIE_MEDIATEK
config PCIE_MEDIATEK_GEN3
tristate "MediaTek Gen3 PCIe controller"
depends on ARCH_MEDIATEK || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
help
Adds support for PCIe Gen3 MAC controller for MediaTek SoCs.
This PCIe controller is compatible with Gen3, Gen2 and Gen1 speed,
@@ -277,7 +277,7 @@ config PCIE_BRCMSTB
depends on ARCH_BRCMSTB || ARCH_BCM2835 || ARCH_BCMBCA || \
BMIPS_GENERIC || COMPILE_TEST
depends on OF
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
default ARCH_BRCMSTB || BMIPS_GENERIC
help
Say Y here to enable PCIe host controller support for
@@ -285,7 +285,7 @@ config PCIE_BRCMSTB

config PCI_HYPERV_INTERFACE
tristate "Hyper-V PCI Interface"
- depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN
+ depends on ((X86 && X86_64) || ARM64) && HYPERV && PCI_MSI && PCI_MSI
help
The Hyper-V PCI Interface is a helper driver allows other drivers to
have a common interface with the Hyper-V PCI frontend driver.
@@ -303,8 +303,6 @@ config PCI_LOONGSON
config PCIE_MICROCHIP_HOST
bool "Microchip AXI PCIe host bridge support"
depends on PCI_MSI && OF
- select PCI_MSI_IRQ_DOMAIN
- select GENERIC_MSI_IRQ_DOMAIN
select PCI_HOST_COMMON
help
Say Y here if you want kernel to support the Microchip AXI PCIe
@@ -326,7 +324,7 @@ config PCIE_APPLE
tristate "Apple PCIe controller"
depends on ARCH_APPLE || COMPILE_TEST
depends on OF
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCI_HOST_COMMON
help
Say Y here if you want to enable PCIe controller support on Apple
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -21,7 +21,7 @@ config PCI_DRA7XX_HOST
tristate "TI DRA7xx PCIe controller Host Mode"
depends on SOC_DRA7XX || COMPILE_TEST
depends on OF && HAS_IOMEM && TI_PIPE3
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select PCI_DRA7XX
default y if SOC_DRA7XX
@@ -53,7 +53,7 @@ config PCIE_DW_PLAT

config PCIE_DW_PLAT_HOST
bool "Platform bus based DesignWare PCIe Controller - Host mode"
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select PCIE_DW_PLAT
help
@@ -67,7 +67,7 @@ config PCIE_DW_PLAT_HOST

config PCIE_DW_PLAT_EP
bool "Platform bus based DesignWare PCIe Controller - Endpoint mode"
- depends on PCI && PCI_MSI_IRQ_DOMAIN
+ depends on PCI && PCI_MSI
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCIE_DW_PLAT
@@ -83,7 +83,7 @@ config PCIE_DW_PLAT_EP
config PCI_EXYNOS
tristate "Samsung Exynos PCIe controller"
depends on ARCH_EXYNOS || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Enables support for the PCIe controller in the Samsung Exynos SoCs
@@ -94,13 +94,13 @@ config PCI_EXYNOS
config PCI_IMX6
bool "Freescale i.MX6/7/8 PCIe controller"
depends on ARCH_MXC || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST

config PCIE_SPEAR13XX
bool "STMicroelectronics SPEAr PCIe controller"
depends on ARCH_SPEAR13XX || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe support on SPEAr13XX SoCs.
@@ -111,7 +111,7 @@ config PCI_KEYSTONE
config PCI_KEYSTONE_HOST
bool "PCI Keystone Host Mode"
depends on ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select PCI_KEYSTONE
help
@@ -135,7 +135,7 @@ config PCI_KEYSTONE_EP
config PCI_LAYERSCAPE
bool "Freescale Layerscape PCIe controller - Host mode"
depends on OF && (ARM || ARCH_LAYERSCAPE || COMPILE_TEST)
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select MFD_SYSCON
help
@@ -160,7 +160,7 @@ config PCI_LAYERSCAPE_EP
config PCI_HISI
depends on OF && (ARM64 || COMPILE_TEST)
bool "HiSilicon Hip05 and Hip06 SoCs PCIe controllers"
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select PCI_HOST_COMMON
help
@@ -170,7 +170,7 @@ config PCI_HISI
config PCIE_QCOM
bool "Qualcomm PCIe controller"
depends on OF && (ARCH_QCOM || COMPILE_TEST)
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select CRC8
help
@@ -191,7 +191,7 @@ config PCIE_QCOM_EP
config PCIE_ARMADA_8K
bool "Marvell Armada-8K PCIe controller"
depends on ARCH_MVEBU || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want to enable PCIe controller support on
@@ -205,7 +205,7 @@ config PCIE_ARTPEC6
config PCIE_ARTPEC6_HOST
bool "Axis ARTPEC-6 PCIe controller Host Mode"
depends on MACH_ARTPEC6 || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select PCIE_ARTPEC6
help
@@ -226,7 +226,7 @@ config PCIE_ROCKCHIP_DW_HOST
bool "Rockchip DesignWare PCIe controller"
select PCIE_DW
select PCIE_DW_HOST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
depends on ARCH_ROCKCHIP || COMPILE_TEST
depends on OF
help
@@ -236,7 +236,7 @@ config PCIE_ROCKCHIP_DW_HOST
config PCIE_INTEL_GW
bool "Intel Gateway PCIe host controller support"
depends on OF && (X86 || COMPILE_TEST)
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Say 'Y' here to enable PCIe Host controller support on Intel
@@ -250,7 +250,7 @@ config PCIE_KEEMBAY
config PCIE_KEEMBAY_HOST
bool "Intel Keem Bay PCIe controller - Host mode"
depends on ARCH_KEEMBAY || COMPILE_TEST
- depends on PCI && PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select PCIE_KEEMBAY
help
@@ -262,7 +262,7 @@ config PCIE_KEEMBAY_HOST
config PCIE_KEEMBAY_EP
bool "Intel Keem Bay PCIe controller - Endpoint mode"
depends on ARCH_KEEMBAY || COMPILE_TEST
- depends on PCI && PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
depends on PCI_ENDPOINT
select PCIE_DW_EP
select PCIE_KEEMBAY
@@ -275,7 +275,7 @@ config PCIE_KEEMBAY_EP
config PCIE_KIRIN
depends on OF && (ARM64 || COMPILE_TEST)
tristate "HiSilicon Kirin series SoCs PCIe controllers"
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support
@@ -284,7 +284,7 @@ config PCIE_KIRIN
config PCIE_HISI_STB
bool "HiSilicon STB SoCs PCIe controllers"
depends on ARCH_HISI || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support on HiSilicon STB SoCs
@@ -292,7 +292,7 @@ config PCIE_HISI_STB
config PCI_MESON
tristate "MESON PCIe controller"
default m if ARCH_MESON
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want to enable PCI controller support on Amlogic
@@ -306,7 +306,7 @@ config PCIE_TEGRA194
config PCIE_TEGRA194_HOST
tristate "NVIDIA Tegra194 (and later) PCIe controller - Host Mode"
depends on ARCH_TEGRA_194_SOC || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select PHY_TEGRA194_P2U
select PCIE_TEGRA194
@@ -336,7 +336,7 @@ config PCIE_TEGRA194_EP
config PCIE_VISCONTI_HOST
bool "Toshiba Visconti PCIe controllers"
depends on ARCH_VISCONTI || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
@@ -346,7 +346,7 @@ config PCIE_UNIPHIER
bool "Socionext UniPhier PCIe host controllers"
depends on ARCH_UNIPHIER || COMPILE_TEST
depends on OF && HAS_IOMEM
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
help
Say Y here if you want PCIe host controller support on UniPhier SoCs.
@@ -365,7 +365,7 @@ config PCIE_UNIPHIER_EP
config PCIE_AL
bool "Amazon Annapurna Labs PCIe controller"
depends on OF && (ARM64 || COMPILE_TEST)
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_DW_HOST
select PCI_ECAM
help
@@ -377,7 +377,7 @@ config PCIE_AL

config PCIE_FU740
bool "SiFive FU740 PCIe host controller"
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
depends on SOC_SIFIVE || COMPILE_TEST
select PCIE_DW_HOST
help
--- a/drivers/pci/controller/mobiveil/Kconfig
+++ b/drivers/pci/controller/mobiveil/Kconfig
@@ -8,14 +8,14 @@ config PCIE_MOBIVEIL

config PCIE_MOBIVEIL_HOST
bool
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_MOBIVEIL

config PCIE_MOBIVEIL_PLAT
bool "Mobiveil AXI PCIe controller"
depends on ARCH_ZYNQMP || COMPILE_TEST
depends on OF
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_MOBIVEIL_HOST
help
Say Y here if you want to enable support for the Mobiveil AXI PCIe
@@ -25,7 +25,7 @@ config PCIE_MOBIVEIL_PLAT
config PCIE_LAYERSCAPE_GEN4
bool "Freescale Layerscape PCIe Gen4 controller"
depends on ARCH_LAYERSCAPE || COMPILE_TEST
- depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_MSI
select PCIE_MOBIVEIL_HOST
help
Say Y here if you want PCIe Gen4 controller support on
--- a/drivers/pci/msi/Makefile
+++ b/drivers/pci/msi/Makefile
@@ -3,5 +3,5 @@
# Makefile for the PCI/MSI
obj-$(CONFIG_PCI) += pcidev_msi.o
obj-$(CONFIG_PCI_MSI) += msi.o
-obj-$(CONFIG_PCI_MSI_IRQ_DOMAIN) += irqdomain.o
+obj-$(CONFIG_PCI_MSI) += irqdomain.o
obj-$(CONFIG_PCI_MSI_ARCH_FALLBACKS) += legacy.o
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -842,7 +842,6 @@ static struct irq_domain *pci_host_bridg
if (!d)
d = pci_host_bridge_acpi_msi_domain(bus);

-#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
/*
* If no IRQ domain was found via the OF tree, try looking it up
* directly through the fwnode_handle.
@@ -854,7 +853,6 @@ static struct irq_domain *pci_host_bridg
d = irq_find_matching_fwnode(fwnode,
DOMAIN_BUS_PCI_MSI);
}
-#endif

return d;
}
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -238,15 +238,6 @@ static inline void msi_desc_set_iommu_co
}
#endif

-#ifdef CONFIG_PCI_MSI
-struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
-void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
-#else /* CONFIG_PCI_MSI */
-static inline void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg)
-{
-}
-#endif /* CONFIG_PCI_MSI */
-
int msi_add_msi_desc(struct device *dev, struct msi_desc *init_desc);
void msi_free_msi_descs_range(struct device *dev, unsigned int first_index, unsigned int last_index);

@@ -259,12 +250,6 @@ static inline void msi_free_msi_descs(st
msi_free_msi_descs_range(dev, 0, MSI_MAX_INDEX);
}

-void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
-void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
-
-void pci_msi_mask_irq(struct irq_data *data);
-void pci_msi_unmask_irq(struct irq_data *data);
-
/*
* The arch hooks to setup up msi irqs. Default functions are implemented
* as weak symbols so that they /can/ be overriden by architecture specific
@@ -466,20 +451,21 @@ int platform_msi_device_domain_alloc(str
void platform_msi_device_domain_free(struct irq_domain *domain, unsigned int virq,
unsigned int nvec);
void *platform_msi_get_host_data(struct irq_domain *domain);
-#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */

-#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
+/* PCI specific interfaces */
+struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
+void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
+void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
+void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
+void pci_msi_mask_irq(struct irq_data *data);
+void pci_msi_unmask_irq(struct irq_data *data);
struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
struct msi_domain_info *info,
struct irq_domain *parent);
u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev);
struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev);
bool pci_dev_has_special_msi_domain(struct pci_dev *pdev);
-#else
-static inline struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev)
-{
- return NULL;
-}
-#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
+
+#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */

#endif /* LINUX_MSI_H */