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authorHanjun Guo <hanjun.guo@linaro.org>2017-03-07 15:40:06 +0300
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2017-03-30 12:20:01 +0300
commitd4f54a186667ffd19eac8e3f48c51d940a9b9784 (patch)
tree7a657d47ea2179269dd97bdebb03ec62e92b0a47 /include/linux/acpi_iort.h
parentae7c18380495ac5c14a614fdb6c452c3bf9148ac (diff)
downloadlinux-d4f54a186667ffd19eac8e3f48c51d940a9b9784.tar.xz
ACPI: platform: setup MSI domain for ACPI based platform device
By allowing platform MSI domain to be created on ACPI platforms, a platform device MSI domain can be set-up when it is probed. In order to do that, the MSI domain the platform device connects to should be retrieved, so the iort_get_platform_device_domain() is introduced to retrieve the domain from the IORT kernel layer. With the domain retrieved, we need a proper way to set the domain to platform device. Given that some platform devices (irqchips) require the MSI irqdomain to be their interrupt parent domain, the MSI irqdomain should be determined before platform device is probed but after the platform device is allocated which means that the code setting up the MSI irqdomain, ie acpi_configure_pmsi_domain() should be called in acpi_platform_notify() (that is triggered after adding a device but before the respective driver is probed) for the platform MSI domain code set-up path to work properly. Acked-by: Rafael J. Wysocki <rafael@kernel.org> [for glue.c] Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> [lorenzo.pieralisi@arm.com: rewrote commit log] Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Ming Lei <ming.lei@canonical.com> Tested-by: Wei Xu <xuwei5@hisilicon.com> Tested-by: Sinan Kaya <okaya@codeaurora.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Tomasz Nowicki <tn@semihalf.com>
Diffstat (limited to 'include/linux/acpi_iort.h')
-rw-r--r--include/linux/acpi_iort.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h
index fd8b9698e1d1..26e25d85eb3e 100644
--- a/include/linux/acpi_iort.h
+++ b/include/linux/acpi_iort.h
@@ -34,6 +34,7 @@ void acpi_iort_init(void);
bool iort_node_match(u8 type);
u32 iort_msi_map_rid(struct device *dev, u32 req_id);
struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id);
+void acpi_configure_pmsi_domain(struct device *dev);
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
/* IOMMU interface */
void iort_set_dma_mask(struct device *dev);
@@ -46,6 +47,7 @@ static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id)
static inline struct irq_domain *iort_get_device_domain(struct device *dev,
u32 req_id)
{ return NULL; }
+static inline void acpi_configure_pmsi_domain(struct device *dev) { }
/* IOMMU interface */
static inline void iort_set_dma_mask(struct device *dev) { }
static inline