1 files changed, 0 insertions, 213 deletions
diff --git a/drivers/iommu/io-pgtable.h b/drivers/iommu/io-pgtable.h
deleted file mode 100644
index 47d5ae559329..000000000000
--- a/drivers/iommu/io-pgtable.h
+++ /dev/null
@@ -1,213 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __IO_PGTABLE_H
-#define __IO_PGTABLE_H
-#include <linux/bitops.h>
-
-/*
- * Public API for use by IOMMU drivers
- */
-enum io_pgtable_fmt {
-	ARM_32_LPAE_S1,
-	ARM_32_LPAE_S2,
-	ARM_64_LPAE_S1,
-	ARM_64_LPAE_S2,
-	ARM_V7S,
-	IO_PGTABLE_NUM_FMTS,
-};
-
-/**
- * struct iommu_gather_ops - IOMMU callbacks for TLB and page table management.
- *
- * @tlb_flush_all: Synchronously invalidate the entire TLB context.
- * @tlb_add_flush: Queue up a TLB invalidation for a virtual address range.
- * @tlb_sync:      Ensure any queued TLB invalidation has taken effect, and
- *                 any corresponding page table updates are visible to the
- *                 IOMMU.
- *
- * Note that these can all be called in atomic context and must therefore
- * not block.
- */
-struct iommu_gather_ops {
-	void (*tlb_flush_all)(void *cookie);
-	void (*tlb_add_flush)(unsigned long iova, size_t size, size_t granule,
-			      bool leaf, void *cookie);
-	void (*tlb_sync)(void *cookie);
-};
-
-/**
- * struct io_pgtable_cfg - Configuration data for a set of page tables.
- *
- * @quirks:        A bitmap of hardware quirks that require some special
- *                 action by the low-level page table allocator.
- * @pgsize_bitmap: A bitmap of page sizes supported by this set of page
- *                 tables.
- * @ias:           Input address (iova) size, in bits.
- * @oas:           Output address (paddr) size, in bits.
- * @tlb:           TLB management callbacks for this set of tables.
- * @iommu_dev:     The device representing the DMA configuration for the
- *                 page table walker.
- */
-struct io_pgtable_cfg {
-	/*
-	 * IO_PGTABLE_QUIRK_ARM_NS: (ARM formats) Set NS and NSTABLE bits in
-	 *	stage 1 PTEs, for hardware which insists on validating them
-	 *	even in	non-secure state where they should normally be ignored.
-	 *
-	 * IO_PGTABLE_QUIRK_NO_PERMS: Ignore the IOMMU_READ, IOMMU_WRITE and
-	 *	IOMMU_NOEXEC flags and map everything with full access, for
-	 *	hardware which does not implement the permissions of a given
-	 *	format, and/or requires some format-specific default value.
-	 *
-	 * IO_PGTABLE_QUIRK_TLBI_ON_MAP: If the format forbids caching invalid
-	 *	(unmapped) entries but the hardware might do so anyway, perform
-	 *	TLB maintenance when mapping as well as when unmapping.
-	 *
-	 * IO_PGTABLE_QUIRK_ARM_MTK_4GB: (ARM v7s format) Set bit 9 in all
-	 *	PTEs, for Mediatek IOMMUs which treat it as a 33rd address bit
-	 *	when the SoC is in "4GB mode" and they can only access the high
-	 *	remap of DRAM (0x1_00000000 to 0x1_ffffffff).
-	 *
-	 * IO_PGTABLE_QUIRK_NO_DMA: Guarantees that the tables will only ever
-	 *	be accessed by a fully cache-coherent IOMMU or CPU (e.g. for a
-	 *	software-emulated IOMMU), such that pagetable updates need not
-	 *	be treated as explicit DMA data.
-	 *
-	 * IO_PGTABLE_QUIRK_NON_STRICT: Skip issuing synchronous leaf TLBIs
-	 *	on unmap, for DMA domains using the flush queue mechanism for
-	 *	delayed invalidation.
-	 */
-	#define IO_PGTABLE_QUIRK_ARM_NS		BIT(0)
-	#define IO_PGTABLE_QUIRK_NO_PERMS	BIT(1)
-	#define IO_PGTABLE_QUIRK_TLBI_ON_MAP	BIT(2)
-	#define IO_PGTABLE_QUIRK_ARM_MTK_4GB	BIT(3)
-	#define IO_PGTABLE_QUIRK_NO_DMA		BIT(4)
-	#define IO_PGTABLE_QUIRK_NON_STRICT	BIT(5)
-	unsigned long			quirks;
-	unsigned long			pgsize_bitmap;
-	unsigned int			ias;
-	unsigned int			oas;
-	const struct iommu_gather_ops	*tlb;
-	struct device			*iommu_dev;
-
-	/* Low-level data specific to the table format */
-	union {
-		struct {
-			u64	ttbr[2];
-			u64	tcr;
-			u64	mair[2];
-		} arm_lpae_s1_cfg;
-
-		struct {
-			u64	vttbr;
-			u64	vtcr;
-		} arm_lpae_s2_cfg;
-
-		struct {
-			u32	ttbr[2];
-			u32	tcr;
-			u32	nmrr;
-			u32	prrr;
-		} arm_v7s_cfg;
-	};
-};
-
-/**
- * struct io_pgtable_ops - Page table manipulation API for IOMMU drivers.
- *
- * @map:          Map a physically contiguous memory region.
- * @unmap:        Unmap a physically contiguous memory region.
- * @iova_to_phys: Translate iova to physical address.
- *
- * These functions map directly onto the iommu_ops member functions with
- * the same names.
- */
-struct io_pgtable_ops {
-	int (*map)(struct io_pgtable_ops *ops, unsigned long iova,
-		   phys_addr_t paddr, size_t size, int prot);
-	size_t (*unmap)(struct io_pgtable_ops *ops, unsigned long iova,
-			size_t size);
-	phys_addr_t (*iova_to_phys)(struct io_pgtable_ops *ops,
-				    unsigned long iova);
-};
-
-/**
- * alloc_io_pgtable_ops() - Allocate a page table allocator for use by an IOMMU.
- *
- * @fmt:    The page table format.
- * @cfg:    The page table configuration. This will be modified to represent
- *          the configuration actually provided by the allocator (e.g. the
- *          pgsize_bitmap may be restricted).
- * @cookie: An opaque token provided by the IOMMU driver and passed back to
- *          the callback routines in cfg->tlb.
- */
-struct io_pgtable_ops *alloc_io_pgtable_ops(enum io_pgtable_fmt fmt,
-					    struct io_pgtable_cfg *cfg,
-					    void *cookie);
-
-/**
- * free_io_pgtable_ops() - Free an io_pgtable_ops structure. The caller
- *                         *must* ensure that the page table is no longer
- *                         live, but the TLB can be dirty.
- *
- * @ops: The ops returned from alloc_io_pgtable_ops.
- */
-void free_io_pgtable_ops(struct io_pgtable_ops *ops);
-
-
-/*
- * Internal structures for page table allocator implementations.
- */
-
-/**
- * struct io_pgtable - Internal structure describing a set of page tables.
- *
- * @fmt:    The page table format.
- * @cookie: An opaque token provided by the IOMMU driver and passed back to
- *          any callback routines.
- * @cfg:    A copy of the page table configuration.
- * @ops:    The page table operations in use for this set of page tables.
- */
-struct io_pgtable {
-	enum io_pgtable_fmt	fmt;
-	void			*cookie;
-	struct io_pgtable_cfg	cfg;
-	struct io_pgtable_ops	ops;
-};
-
-#define io_pgtable_ops_to_pgtable(x) container_of((x), struct io_pgtable, ops)
-
-static inline void io_pgtable_tlb_flush_all(struct io_pgtable *iop)
-{
-	iop->cfg.tlb->tlb_flush_all(iop->cookie);
-}
-
-static inline void io_pgtable_tlb_add_flush(struct io_pgtable *iop,
-		unsigned long iova, size_t size, size_t granule, bool leaf)
-{
-	iop->cfg.tlb->tlb_add_flush(iova, size, granule, leaf, iop->cookie);
-}
-
-static inline void io_pgtable_tlb_sync(struct io_pgtable *iop)
-{
-	iop->cfg.tlb->tlb_sync(iop->cookie);
-}
-
-/**
- * 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.
- */
-struct io_pgtable_init_fns {
-	struct io_pgtable *(*alloc)(struct io_pgtable_cfg *cfg, void *cookie);
-	void (*free)(struct io_pgtable *iop);
-};
-
-extern struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s1_init_fns;
-extern struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s2_init_fns;
-extern struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s1_init_fns;
-extern struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s2_init_fns;
-extern struct io_pgtable_init_fns io_pgtable_arm_v7s_init_fns;
-
-#endif /* __IO_PGTABLE_H */