const u32 *id)
{
const struct iommu_ops *ops = NULL;
- struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+ struct iommu_fwspec *fwspec;
int err = NO_IOMMU;
if (!master_np)
return NULL;
+ /* Serialise to make dev->iommu stable under our potential fwspec */
+ mutex_lock(&iommu_probe_device_lock);
+ fwspec = dev_iommu_fwspec_get(dev);
if (fwspec) {
- if (fwspec->ops)
+ if (fwspec->ops) {
+ mutex_unlock(&iommu_probe_device_lock);
return fwspec->ops;
-
+ }
/* In the deferred case, start again from scratch */
iommu_fwspec_free(dev);
}
fwspec = dev_iommu_fwspec_get(dev);
ops = fwspec->ops;
}
+ mutex_unlock(&iommu_probe_device_lock);
+
/*
* If we have reason to believe the IOMMU driver missed the initial
* probe for dev, replay it to get things in order.
if (start == phys->start && end == phys->end)
return IOMMU_RESV_DIRECT;
- dev_warn(dev, "treating non-direct mapping [%pr] -> [%pap-%pap] as reservation\n", &phys,
+ dev_warn(dev, "treating non-direct mapping [%pr] -> [%pap-%pap] as reservation\n", phys,
&start, &end);
return IOMMU_RESV_RESERVED;
}
phys_addr_t iova;
size_t length;
+ if (of_dma_is_coherent(dev->of_node))
+ prot |= IOMMU_CACHE;
+
maps = of_translate_dma_region(np, maps, &iova, &length);
+ if (length == 0) {
+ dev_warn(dev, "Cannot reserve IOVA region of 0 size\n");
+ continue;
+ }
type = iommu_resv_region_get_type(dev, &phys, iova, length);
region = iommu_alloc_resv_region(iova, length, prot, type,