#include <linux/idr.h>
#include <linux/err.h>
#include <linux/pci.h>
+#include <linux/pci-ats.h>
#include <linux/bitops.h>
#include <linux/platform_device.h>
#include <linux/property.h>
kfree(param);
}
+static u32 dev_iommu_get_max_pasids(struct device *dev)
+{
+ u32 max_pasids = 0, bits = 0;
+ int ret;
+
+ if (dev_is_pci(dev)) {
+ ret = pci_max_pasids(to_pci_dev(dev));
+ if (ret > 0)
+ max_pasids = ret;
+ } else {
+ ret = device_property_read_u32(dev, "pasid-num-bits", &bits);
+ if (!ret)
+ max_pasids = 1UL << bits;
+ }
+
+ return min_t(u32, max_pasids, dev->iommu->iommu_dev->max_pasids);
+}
+
static int __iommu_probe_device(struct device *dev, struct list_head *group_list)
{
const struct iommu_ops *ops = dev->bus->iommu_ops;
}
dev->iommu->iommu_dev = iommu_dev;
+ dev->iommu->max_pasids = dev_iommu_get_max_pasids(dev);
group = iommu_group_get_for_dev(dev);
if (IS_ERR(group)) {
* @fwspec: IOMMU fwspec data
* @iommu_dev: IOMMU device this device is linked to
* @priv: IOMMU Driver private data
+ * @max_pasids: number of PASIDs this device can consume
*
* TODO: migrate other per device data pointers under iommu_dev_data, e.g.
* struct iommu_group *iommu_group;
struct iommu_fwspec *fwspec;
struct iommu_device *iommu_dev;
void *priv;
+ u32 max_pasids;
};
int iommu_device_register(struct iommu_device *iommu,