1 files changed, 156 insertions, 0 deletions
diff --git a/include/linux/rockchip-iovmm.h b/include/linux/rockchip-iovmm.h
new file mode 100644
index 000000000000..73e2ff159e86
--- /dev/null
+++ b/include/linux/rockchip-iovmm.h
@@ -0,0 +1,156 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_PLAT_IOVMM_H
+#define __ASM_PLAT_IOVMM_H
+
+#include <linux/list.h>
+#include <linux/atomic.h>
+#include <linux/spinlock.h>
+
+#define IEP_IOMMU_COMPATIBLE_NAME "rockchip,iep_mmu"
+#define VIP_IOMMU_COMPATIBLE_NAME "rockchip,vip_mmu"
+#define ISP_IOMMU_COMPATIBLE_NAME "rockchip,isp_mmu"
+#define ISP0_IOMMU_COMPATIBLE_NAME "rockchip,isp0_mmu"
+#define ISP1_IOMMU_COMPATIBLE_NAME "rockchip,isp1_mmu"
+#define VOPB_IOMMU_COMPATIBLE_NAME "rockchip,vopb_mmu"
+#define VOPL_IOMMU_COMPATIBLE_NAME "rockchip,vopl_mmu"
+#define VOP_IOMMU_COMPATIBLE_NAME	"rockchip,vop_mmu"
+#define HEVC_IOMMU_COMPATIBLE_NAME "rockchip,hevc_mmu"
+#define VPU_IOMMU_COMPATIBLE_NAME "rockchip,vpu_mmu"
+#define VDEC_IOMMU_COMPATIBLE_NAME "rockchip,vdec_mmu"
+
+enum rk_iommu_inttype {
+	IOMMU_PAGEFAULT,
+	IOMMU_BUSERROR,
+	IOMMU_FAULT_UNKNOWN,
+	IOMMU_FAULTS_NUM
+};
+
+struct iommu_drvdata;
+
+/*
+ * @itype: type of fault.
+ * @pgtable_base: the physical address of page table base. This is 0 if @itype
+ *				  is IOMMU_BUSERROR.
+ * @fault_addr: the device (virtual) address that the System MMU tried to
+ *			   translated. This is 0 if @itype is IOMMU_BUSERROR.
+ */
+typedef int (*rockchip_iommu_fault_handler_t)(struct device *dev,
+					  enum rk_iommu_inttype itype,
+					  unsigned long pgtable_base,
+					  unsigned long fault_addr,
+					  unsigned int statu
+					  );
+
+
+struct scatterlist;
+struct device;
+
+#ifdef CONFIG_RK_IOVMM
+
+int rockchip_iovmm_activate(struct device *dev);
+void rockchip_iovmm_deactivate(struct device *dev);
+
+/* rockchip_iovmm_map() - Maps a list of physical memory chunks
+ * @dev: the owner of the IO address space where the mapping is created
+ * @sg: list of physical memory chunks to map
+ * @offset: length in bytes where the mapping starts
+ * @size: how much memory to map in bytes. @offset + @size must not exceed
+ *        total size of @sg
+ *
+ * This function returns mapped IO address in the address space of @dev.
+ * Returns minus error number if mapping fails.
+ * Caller must check its return code with IS_ERROR_VALUE() if the function
+ * succeeded.
+ *
+ * The caller of this function must ensure that iovmm_cleanup() is not called
+ * while this function is called.
+ *
+ */
+dma_addr_t rockchip_iovmm_map(struct device *dev, struct scatterlist *sg,
+		     off_t offset, size_t size);
+
+/* rockchip_iovmm_unmap() - unmaps the given IO address
+ * @dev: the owner of the IO address space where @iova belongs
+ * @iova: IO address that needs to be unmapped and freed.
+ *
+ * The caller of this function must ensure that iovmm_cleanup() is not called
+ * while this function is called.
+ */
+void rockchip_iovmm_unmap(struct device *dev, dma_addr_t iova);
+
+/* rockchip_iovmm_map_oto - create one to one mapping for the given physical address
+ * @dev: the owner of the IO address space to map
+ * @phys: physical address to map
+ * @size: size of the mapping to create
+ *
+ * This function return 0 if mapping is successful. Otherwise, minus error
+ * value.
+ */
+int rockchip_iovmm_map_oto(struct device *dev, phys_addr_t phys, size_t size);
+
+/* rockchip_iovmm_unmap_oto - remove one to one mapping
+ * @dev: the owner ofthe IO address space
+ * @phys: physical address to remove mapping
+ */
+void rockchip_iovmm_unmap_oto(struct device *dev, phys_addr_t phys);
+
+void rockchip_iovmm_set_fault_handler(struct device *dev,
+				       rockchip_iommu_fault_handler_t handler);
+/** rockchip_iovmm_set_fault_handler() - Fault handler for IOMMUs
+ * Called when interrupt occurred by the IOMMUs
+ * The device drivers of peripheral devices that has a IOMMU can implement
+ * a fault handler to resolve address translation fault by IOMMU.
+ * The meanings of return value and parameters are described below.
+ *
+ * return value: non-zero if the fault is correctly resolved.
+ *		   zero if the fault is not handled.
+ */
+
+int rockchip_iovmm_invalidate_tlb(struct device *dev);
+#else
+static inline int rockchip_iovmm_activate(struct device *dev)
+{
+	return -ENOSYS;
+}
+
+static inline void rockchip_iovmm_deactivate(struct device *dev)
+{
+}
+
+static inline dma_addr_t rockchip_iovmm_map(struct device *dev,
+			struct scatterlist *sg, off_t offset, size_t size)
+{
+	return -ENOSYS;
+}
+
+static inline void rockchip_iovmm_unmap(struct device *dev, dma_addr_t iova)
+{
+}
+
+static inline int rockchip_iovmm_map_oto(struct device *dev, phys_addr_t phys,
+				size_t size)
+{
+	return -ENOSYS;
+}
+
+static inline void rockchip_iovmm_unmap_oto(struct device *dev, phys_addr_t phys)
+{
+}
+
+static inline void rockchip_iovmm_set_fault_handler(struct device *dev,
+				       rockchip_iommu_fault_handler_t handler)
+{
+}
+static inline int rockchip_iovmm_invalidate_tlb(struct device *dev)
+{
+	return -ENOSYS;
+}
+
+#endif /* CONFIG_RK_IOVMM */
+
+#endif /*__ASM_PLAT_IOVMM_H*/