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-rw-r--r--include/linux/iommu.h39
1 files changed, 13 insertions, 26 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 46e1347bfa22..3589d1b8f922 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -228,6 +228,9 @@ struct iommu_iotlb_gather {
* @release_device: Remove device from iommu driver handling
* @probe_finalize: Do final setup work after the device is added to an IOMMU
* group and attached to the groups domain
+ * @set_platform_dma_ops: Returning control back to the platform DMA ops. This op
+ * is to support old IOMMU drivers, new drivers should use
+ * default domains, and the common IOMMU DMA ops.
* @device_group: find iommu group for a particular device
* @get_resv_regions: Request list of reserved regions for a device
* @of_xlate: add OF master IDs to iommu grouping
@@ -256,6 +259,7 @@ struct iommu_ops {
struct iommu_device *(*probe_device)(struct device *dev);
void (*release_device)(struct device *dev);
void (*probe_finalize)(struct device *dev);
+ void (*set_platform_dma_ops)(struct device *dev);
struct iommu_group *(*device_group)(struct device *dev);
/* Request/Free a list of reserved regions for a device */
@@ -295,7 +299,6 @@ struct iommu_ops {
* * EBUSY - device is attached to a domain and cannot be changed
* * ENODEV - device specific errors, not able to be attached
* * <others> - treated as ENODEV by the caller. Use is discouraged
- * @detach_dev: detach an iommu domain from a device
* @set_dev_pasid: set an iommu domain to a pasid of device
* @map: map a physically contiguous memory region to an iommu domain
* @map_pages: map a physically contiguous set of pages of the same size to
@@ -316,7 +319,6 @@ struct iommu_ops {
*/
struct iommu_domain_ops {
int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
- void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
int (*set_dev_pasid)(struct iommu_domain *domain, struct device *dev,
ioasid_t pasid);
@@ -401,6 +403,7 @@ struct iommu_fault_param {
* @iommu_dev: IOMMU device this device is linked to
* @priv: IOMMU Driver private data
* @max_pasids: number of PASIDs this device can consume
+ * @attach_deferred: the dma domain attachment is deferred
*
* TODO: migrate other per device data pointers under iommu_dev_data, e.g.
* struct iommu_group *iommu_group;
@@ -413,6 +416,7 @@ struct dev_iommu {
struct iommu_device *iommu_dev;
void *priv;
u32 max_pasids;
+ u32 attach_deferred:1;
};
int iommu_device_register(struct iommu_device *iommu,
@@ -467,19 +471,15 @@ extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot);
-extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot);
+ phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t size);
extern size_t iommu_unmap_fast(struct iommu_domain *domain,
unsigned long iova, size_t size,
struct iommu_iotlb_gather *iotlb_gather);
extern ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
- struct scatterlist *sg, unsigned int nents, int prot);
-extern ssize_t iommu_map_sg_atomic(struct iommu_domain *domain,
- unsigned long iova, struct scatterlist *sg,
- unsigned int nents, int prot);
+ struct scatterlist *sg, unsigned int nents,
+ int prot, gfp_t gfp);
extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
extern void iommu_set_fault_handler(struct iommu_domain *domain,
iommu_fault_handler_t handler, void *token);
@@ -773,14 +773,7 @@ static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
}
static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
- phys_addr_t paddr, size_t size, int prot)
-{
- return -ENODEV;
-}
-
-static inline int iommu_map_atomic(struct iommu_domain *domain,
- unsigned long iova, phys_addr_t paddr,
- size_t size, int prot)
+ phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
{
return -ENODEV;
}
@@ -800,14 +793,7 @@ static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
static inline ssize_t iommu_map_sg(struct iommu_domain *domain,
unsigned long iova, struct scatterlist *sg,
- unsigned int nents, int prot)
-{
- return -ENODEV;
-}
-
-static inline ssize_t iommu_map_sg_atomic(struct iommu_domain *domain,
- unsigned long iova, struct scatterlist *sg,
- unsigned int nents, int prot)
+ unsigned int nents, int prot, gfp_t gfp)
{
return -ENODEV;
}
@@ -1118,7 +1104,8 @@ iommu_get_domain_for_dev_pasid(struct device *dev, ioasid_t pasid,
static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
unsigned long iova, struct sg_table *sgt, int prot)
{
- return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
+ return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot,
+ GFP_KERNEL);
}
#ifdef CONFIG_IOMMU_DEBUGFS