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device property: ACPI: Remove unused DMA APIs 

These DMA APIs are replaced with the newer versions, which return
the enum dev_dma_attr. So, we can safely remove them.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Suthikulpanit, Suravee 2015-10-28 15:50:51 -07:00 committed by Rafael J. Wysocki
parent 1831eff876
commit ab3d527329
4 changed files with 0 additions and 54 deletions
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13
drivers/base/property.c
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@ -598,19 +598,6 @@ 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 coherent = false;
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 coherent;
}
EXPORT_SYMBOL_GPL(device_dma_is_coherent);
bool device_dma_supported(struct device *dev)
{
/* For DT, this is always supported.

34
include/acpi/acpi_bus.h
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@ -390,40 +390,6 @@ struct acpi_data_node {
struct completion kobj_done;
};
static inline bool acpi_check_dma(struct acpi_device *adev, bool *coherent)
{
bool ret = false;
if (!adev)
return ret;
/**
* Currently, we only support _CCA=1 (i.e. coherent_dma=1)
* This should be equivalent to specifyig dma-coherent for
* a device in OF.
*
* For the case when _CCA=0 (i.e. coherent_dma=0 && cca_seen=1),
* There are two cases:
* case 1. Do not support and disable DMA.
* case 2. Support but rely on arch-specific cache maintenance for
* non-coherence DMA operations.
* Currently, we implement case 2 above.
*
* For the case when _CCA is missing (i.e. cca_seen=0) and
* platform specifies ACPI_CCA_REQUIRED, we do not support DMA,
* and fallback to arch-specific default handling.
*
* See acpi_init_coherency() for more info.
*/
if (adev->flags.coherent_dma ||
(adev->flags.cca_seen && IS_ENABLED(CONFIG_ARM64))) {
ret = true;
if (coherent)
*coherent = adev->flags.coherent_dma;
}
return ret;
}
static inline bool is_acpi_node(struct fwnode_handle *fwnode)
{
return fwnode && (fwnode->type == FWNODE_ACPI

5
include/linux/acpi.h
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@ -574,11 +574,6 @@ static inline int acpi_device_modalias(struct device *dev,
return -ENODEV;
}
static inline bool acpi_check_dma(struct acpi_device *adev, bool *coherent)
{
return false;
}
static inline bool acpi_dma_supported(struct acpi_device *adev)
{
return false;

2
include/linux/property.h
View File

@ -174,8 +174,6 @@ struct property_set {
void device_add_property_set(struct device *dev, struct property_set *pset);
bool device_dma_is_coherent(struct device *dev);
bool device_dma_supported(struct device *dev);
enum dev_dma_attr device_get_dma_attr(struct device *dev);