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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-11-07 01:30:10 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-11-07 01:30:10 +0100 |
| commit | f2115faaf0df42623638dfbfc5bdaab6ef7375ab (patch) | |
| tree | f8bbd5a1ad3fbcb0b60e455d0dcf29a9fc25602c /drivers/base | |
| parent | 0d51ce9ca1116e8f4dc87cb51db8dd250327e9bb (diff) | |
| parent | 29dbe1f0af88b4162d2b57e790db7a51ab061f35 (diff) | |
Merge branch 'acpi-pci'
* acpi-pci:
PCI: ACPI: Add support for PCI device DMA coherency
PCI: OF: Move of_pci_dma_configure() to pci_dma_configure()
of/pci: Fix pci_get_host_bridge_device leak
device property: ACPI: Remove unused DMA APIs
device property: ACPI: Make use of the new DMA Attribute APIs
device property: Adding DMA Attribute APIs for Generic Devices
ACPI: Adding DMA Attribute APIs for ACPI Device
device property: Introducing enum dev_dma_attr
ACPI: Honor ACPI _CCA attribute setting
Conflicts:
drivers/crypto/ccp/ccp-platform.c
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/property.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index de40623bbd8a..1325ff225cc4 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -598,18 +598,34 @@ unsigned int device_get_child_node_count(struct device *dev) } EXPORT_SYMBOL_GPL(device_get_child_node_count); -bool device_dma_is_coherent(struct device *dev) +bool device_dma_supported(struct device *dev) { - bool coherent = false; - + /* For DT, this is always supported. + * For ACPI, this depends on CCA, which + * is determined by the acpi_dma_supported(). + */ if (IS_ENABLED(CONFIG_OF) && dev->of_node) - coherent = of_dma_is_coherent(dev->of_node); - else - acpi_check_dma(ACPI_COMPANION(dev), &coherent); + return true; + + return acpi_dma_supported(ACPI_COMPANION(dev)); +} +EXPORT_SYMBOL_GPL(device_dma_supported); - return coherent; +enum dev_dma_attr device_get_dma_attr(struct device *dev) +{ + enum dev_dma_attr attr = DEV_DMA_NOT_SUPPORTED; + + if (IS_ENABLED(CONFIG_OF) && dev->of_node) { + if (of_dma_is_coherent(dev->of_node)) + attr = DEV_DMA_COHERENT; + else + attr = DEV_DMA_NON_COHERENT; + } else + attr = acpi_get_dma_attr(ACPI_COMPANION(dev)); + + return attr; } -EXPORT_SYMBOL_GPL(device_dma_is_coherent); +EXPORT_SYMBOL_GPL(device_get_dma_attr); /** * device_get_phy_mode - Get phy mode for given device |