#include <linux/mm.h>
#include <linux/xarray.h>
#include <linux/cdx/cdx_bus.h>
+#include <linux/iommu.h>
+#include <linux/dma-map-ops.h>
#include "cdx.h"
/* Default DMA mask for devices on a CDX bus */
static int cdx_dma_configure(struct device *dev)
{
+ struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
struct cdx_device *cdx_dev = to_cdx_device(dev);
u32 input_id = cdx_dev->req_id;
int ret;
return ret;
}
+ if (!ret && !cdx_drv->driver_managed_dma) {
+ ret = iommu_device_use_default_domain(dev);
+ if (ret)
+ arch_teardown_dma_ops(dev);
+ }
+
return 0;
}
+static void cdx_dma_cleanup(struct device *dev)
+{
+ struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+
+ if (!cdx_drv->driver_managed_dma)
+ iommu_device_unuse_default_domain(dev);
+}
+
/* show configuration fields */
#define cdx_config_attr(field, format_string) \
static ssize_t \
.remove = cdx_remove,
.shutdown = cdx_shutdown,
.dma_configure = cdx_dma_configure,
+ .dma_cleanup = cdx_dma_cleanup,
.bus_groups = cdx_bus_groups,
.dev_groups = cdx_dev_groups,
};