diff options
Diffstat (limited to 'include/linux/io-pgtable.h')
| -rw-r--r-- | include/linux/io-pgtable.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 1b7a44b35616..b1ecfc3cd5bc 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -85,6 +85,8 @@ struct io_pgtable_cfg { * * IO_PGTABLE_QUIRK_ARM_OUTER_WBWA: Override the outer-cacheability * attributes set in the TCR for a non-coherent page-table walker. + * + * IO_PGTABLE_QUIRK_ARM_HD: Enables dirty tracking in stage 1 pagetable. */ #define IO_PGTABLE_QUIRK_ARM_NS BIT(0) #define IO_PGTABLE_QUIRK_NO_PERMS BIT(1) @@ -92,6 +94,7 @@ struct io_pgtable_cfg { #define IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT BIT(4) #define IO_PGTABLE_QUIRK_ARM_TTBR1 BIT(5) #define IO_PGTABLE_QUIRK_ARM_OUTER_WBWA BIT(6) + #define IO_PGTABLE_QUIRK_ARM_HD BIT(7) unsigned long quirks; unsigned long pgsize_bitmap; unsigned int ias; @@ -100,6 +103,30 @@ struct io_pgtable_cfg { const struct iommu_flush_ops *tlb; struct device *iommu_dev; + /** + * @alloc: Custom page allocator. + * + * Optional hook used to allocate page tables. If this function is NULL, + * @free must be NULL too. + * + * Memory returned should be zeroed and suitable for dma_map_single() and + * virt_to_phys(). + * + * Not all formats support custom page allocators. Before considering + * passing a non-NULL value, make sure the chosen page format supports + * this feature. + */ + void *(*alloc)(void *cookie, size_t size, gfp_t gfp); + + /** + * @free: Custom page de-allocator. + * + * Optional hook used to free page tables allocated with the @alloc + * hook. Must be non-NULL if @alloc is not NULL, must be NULL + * otherwise. + */ + void (*free)(void *cookie, void *pages, size_t size); + /* Low-level data specific to the table format */ union { struct { @@ -144,6 +171,10 @@ struct io_pgtable_cfg { u64 ttbr[4]; u32 n_ttbrs; } apple_dart_cfg; + + struct { + int nid; + } amd; }; }; @@ -166,6 +197,10 @@ struct io_pgtable_ops { struct iommu_iotlb_gather *gather); phys_addr_t (*iova_to_phys)(struct io_pgtable_ops *ops, unsigned long iova); + int (*read_and_clear_dirty)(struct io_pgtable_ops *ops, + unsigned long iova, size_t size, + unsigned long flags, + struct iommu_dirty_bitmap *dirty); }; /** @@ -238,15 +273,25 @@ io_pgtable_tlb_add_page(struct io_pgtable *iop, } /** + * enum io_pgtable_caps - IO page table backend capabilities. + */ +enum io_pgtable_caps { + /** @IO_PGTABLE_CAP_CUSTOM_ALLOCATOR: Backend accepts custom page table allocators. */ + IO_PGTABLE_CAP_CUSTOM_ALLOCATOR = BIT(0), +}; + +/** * struct io_pgtable_init_fns - Alloc/free a set of page tables for a * particular format. * * @alloc: Allocate a set of page tables described by cfg. * @free: Free the page tables associated with iop. + * @caps: Combination of @io_pgtable_caps flags encoding the backend capabilities. */ struct io_pgtable_init_fns { struct io_pgtable *(*alloc)(struct io_pgtable_cfg *cfg, void *cookie); void (*free)(struct io_pgtable *iop); + u32 caps; }; extern struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s1_init_fns; |