Not all the ARM64 targets that are using ACPI have PCI, so introduce
some stub functions to make PCI optional for ACPI, and make ACPI core
run without CONFIG_PCI on ARM64.
pcibios_penalize_isa_irq() is arch dependent, introduce asm/pci.h to
include it.
Since ACPI on X86 and IA64 depends on PCI, it will not break X86 and
IA64 with this patch.
Signed-off-by: Graeme Gregory <graeme.greg...@linaro.org>
Signed-off-by: Al Stone <al.st...@linaro.org>
Signed-off-by: Hanjun Guo <hanjun....@linaro.org>
---
arch/arm64/include/asm/pci.h | 20 ++++++++++++++++++++
drivers/acpi/Makefile | 2 +-
drivers/acpi/internal.h | 7 +++++++
drivers/acpi/osl.c | 3 ++-
include/linux/pci.h | 33 ++++++++++++++++++++++++---------
5 files changed, 54 insertions(+), 11 deletions(-)
create mode 100644 arch/arm64/include/asm/pci.h
diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h
new file mode 100644
index 0000000..455909d
--- /dev/null
+++ b/arch/arm64/include/asm/pci.h
@@ -0,0 +1,20 @@
+#ifndef __ASMARM64_PCI_H
+#define __ASMARM64_PCI_H
+
+#ifdef __KERNEL__
+
+static inline void pcibios_penalize_isa_irq(int irq, int active)
+{
+ /* We don't do dynamic PCI IRQ allocation */
+}
+
+/*
+ * The PCI address space does equal the physical memory address space.
+ * The networking and block device layers use this boolean for bounce
+ * buffer decisions.
+ */
+#define PCI_DMA_BUS_IS_PHYS (1)
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASMARM64_PCI_H */
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 0331f91..d8cebe3 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -38,7 +38,7 @@ acpi-y += acpi_processor.o
acpi-y += processor_core.o
acpi-y += ec.o
acpi-$(CONFIG_ACPI_DOCK) += dock.o
-acpi-y += pci_root.o pci_link.o pci_irq.o
+acpi-$(CONFIG_PCI) += pci_root.o pci_link.o pci_irq.o
acpi-$(CONFIG_X86_INTEL_LPSS) += acpi_lpss.o
acpi-y += acpi_platform.o
acpi-y += power.o
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index a29739c..52dff47 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -26,9 +26,16 @@
acpi_status acpi_os_initialize1(void);
int init_acpi_device_notify(void);
int acpi_scan_init(void);
+#ifdef CONFIG_PCI
void acpi_pci_root_init(void);
void acpi_pci_link_init(void);
void acpi_pci_root_hp_init(void);
+#else
+static inline void acpi_pci_root_init(void) {}
+static inline void acpi_pci_link_init(void) {}
+static inline void acpi_pci_root_hp_init(void) {}
+#endif /* CONFIG_PCI */
+
void acpi_processor_init(void);
void acpi_platform_init(void);
int acpi_sysfs_init(void);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 54a20ff..14ee6fc 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1050,7 +1050,8 @@ acpi_os_read_pci_configuration(struct acpi_pci_id *
pci_id, u32 reg,
result = raw_pci_read(pci_id->segment, pci_id->bus,
PCI_DEVFN(pci_id->device, pci_id->function),
reg, size, &value32);
- *value = value32;
+ if (!result)
+ *value = value32;
return (result ? AE_ERROR : AE_OK);
}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index a13d682..726cf2a 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -541,15 +541,6 @@ struct pci_ops {
int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int
size, u32 val);
};
-/*
- * ACPI needs to be able to access PCI config space before we've done a
- * PCI bus scan and created pci_bus structures.
- */
-int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
- int reg, int len, u32 *val);
-int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
- int reg, int len, u32 val);
-
struct pci_bus_region {
resource_size_t start;
resource_size_t end;
@@ -1281,6 +1272,15 @@ typedef int (*arch_set_vga_state_t)(struct pci_dev
*pdev, bool decode,
unsigned int command_bits, u32 flags);
void pci_register_set_vga_state(arch_set_vga_state_t func);
+/*
+ * ACPI needs to be able to access PCI config space before we've done a
+ * PCI bus scan and created pci_bus structures.
+ */
+int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
+ int reg, int len, u32 *val);
+int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
+ int reg, int len, u32 val);
+
#else /* CONFIG_PCI is not enabled */
/*
@@ -1477,6 +1477,21 @@ static inline int pci_domain_nr(struct pci_bus *bus)
static inline struct pci_dev *pci_dev_get(struct pci_dev *dev)
{ return NULL; }
+static inline struct pci_bus *pci_find_bus(int domain, int busnr)
+{ return NULL; }
+
+static inline int pci_bus_write_config_byte(struct pci_bus *bus,
+ unsigned int devfn, int where, u8 val)
+{ return -ENODEV; }
+
+static inline int raw_pci_read(unsigned int domain, unsigned int bus,
+ unsigned int devfn, int reg, int len, u32 *val)
+{ return -EINVAL; }
+
+static inline int raw_pci_write(unsigned int domain, unsigned int bus,
+ unsigned int devfn, int reg, int len, u32 val)
+{return -EINVAL; }
+
#define dev_is_pci(d) (false)
#define dev_is_pf(d) (false)
#define dev_num_vf(d) (0)
--
1.7.9.5
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