iommu/iommufd/io_pagetable.h

20  * populated in the page table. Each area is fully populated with pages.
25  * up or tearing down the area. When observed under the write side of the
26  * domain_rwsem a NULL pages must mean the area is still being setup and no
30  * for this area. It is locked by the pages->mutex. This simplifies the locking
45 	/* How many bytes into the first page the area starts */
62 int iopt_area_fill_domains(struct iopt_area *area, struct iopt_pages *pages);
63 void iopt_area_unfill_domains(struct iopt_area *area, struct iopt_pages *pages);
65 int iopt_area_fill_domain(struct iopt_area *area, struct iommu_domain *domain);
66 void iopt_area_unfill_domain(struct iopt_area *area, struct iopt_pages *pages,
68 void iopt_area_unmap_domain(struct iopt_area *area,
71 static inline unsigned long iopt_area_index(struct iopt_area *area)
73 	return area->pages_node.start;
76 static inline unsigned long iopt_area_last_index(struct iopt_area *area)
78 	return area->pages_node.last;
81 static inline unsigned long iopt_area_iova(struct iopt_area *area)
83 	return area->node.start;
86 static inline unsigned long iopt_area_last_iova(struct iopt_area *area)
88 	return area->node.last;
91 static inline size_t iopt_area_length(struct iopt_area *area)
93 	return (area->node.last - area->node.start) + 1;
101 static inline unsigned long iopt_area_start_byte(struct iopt_area *area,
105 		WARN_ON(iova < iopt_area_iova(area) ||
106 			iova > iopt_area_last_iova(area));
107 	return (iova - iopt_area_iova(area)) + area->page_offset +
108 	       iopt_area_index(area) * PAGE_SIZE;
111 static inline unsigned long iopt_area_iova_to_index(struct iopt_area *area,
114 	return iopt_area_start_byte(area, iova) / PAGE_SIZE;
143 __make_iopt_iter(area)
150 	struct iopt_area *area;
160 	return iter->area && iter->last_iova <= iopt_area_last_iova(iter->area);
168 #define iopt_for_each_contig_area(iter, area, iopt, iova, last_iova)          \
169 	for (area = iopt_area_contig_init(iter, iopt, iova, last_iova); area; \
170 	     area = iopt_area_contig_next(iter))
224 int iopt_area_add_access(struct iopt_area *area, unsigned long start,
227 void iopt_area_remove_access(struct iopt_area *area, unsigned long start,