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Diffstat (limited to 'include/linux/iommu.h')
-rw-r--r--include/linux/iommu.h25
1 files changed, 24 insertions, 1 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index e6a7c9ff72f2..7a7bd15e54f1 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -22,12 +22,13 @@
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/types.h>
+#include <linux/scatterlist.h>
#include <trace/events/iommu.h>
#define IOMMU_READ (1 << 0)
#define IOMMU_WRITE (1 << 1)
#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
-#define IOMMU_EXEC (1 << 3)
+#define IOMMU_NOEXEC (1 << 3)
struct iommu_ops;
struct iommu_group;
@@ -61,6 +62,7 @@ enum iommu_cap {
IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
transactions */
IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
+ IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
};
/*
@@ -97,6 +99,8 @@ enum iommu_attr {
* @detach_dev: detach device from an iommu domain
* @map: map a physically contiguous memory region to an iommu domain
* @unmap: unmap a physically contiguous memory region from an iommu domain
+ * @map_sg: map a scatter-gather list of physically contiguous memory chunks
+ * to an iommu domain
* @iova_to_phys: translate iova to physical address
* @add_device: add device to iommu grouping
* @remove_device: remove device from iommu grouping
@@ -114,6 +118,8 @@ struct iommu_ops {
phys_addr_t paddr, size_t size, int prot);
size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
size_t size);
+ size_t (*map_sg)(struct iommu_domain *domain, unsigned long iova,
+ struct scatterlist *sg, unsigned int nents, int prot);
phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
int (*add_device)(struct device *dev);
void (*remove_device)(struct device *dev);
@@ -156,6 +162,9 @@ extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot);
extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t size);
+extern size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
+ struct scatterlist *sg,unsigned int nents,
+ int prot);
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);
@@ -241,6 +250,13 @@ static inline int report_iommu_fault(struct iommu_domain *domain,
return ret;
}
+static inline size_t iommu_map_sg(struct iommu_domain *domain,
+ unsigned long iova, struct scatterlist *sg,
+ unsigned int nents, int prot)
+{
+ return domain->ops->map_sg(domain, iova, sg, nents, prot);
+}
+
#else /* CONFIG_IOMMU_API */
struct iommu_ops {};
@@ -293,6 +309,13 @@ static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
return -ENODEV;
}
+static inline size_t iommu_map_sg(struct iommu_domain *domain,
+ unsigned long iova, struct scatterlist *sg,
+ unsigned int nents, int prot)
+{
+ return -ENODEV;
+}
+
static inline int iommu_domain_window_enable(struct iommu_domain *domain,
u32 wnd_nr, phys_addr_t paddr,
u64 size, int prot)