diff options
Diffstat (limited to 'drivers/iommu/io-pgtable.h')
| -rw-r--r-- | drivers/iommu/io-pgtable.h | 69 |
1 files changed, 67 insertions, 2 deletions
diff --git a/drivers/iommu/io-pgtable.h b/drivers/iommu/io-pgtable.h index ac9e2341a633..0326bb6a4afa 100644 --- a/drivers/iommu/io-pgtable.h +++ b/drivers/iommu/io-pgtable.h @@ -1,6 +1,9 @@ #ifndef __IO_PGTABLE_H #define __IO_PGTABLE_H +#include <linux/scatterlist.h> +#include <soc/qcom/msm_tz_smmu.h> + /* * Public API for use by IOMMU drivers */ @@ -9,6 +12,8 @@ enum io_pgtable_fmt { ARM_32_LPAE_S2, ARM_64_LPAE_S1, ARM_64_LPAE_S2, + ARM_MSM_SECURE, + ARM_V8L_FAST, IO_PGTABLE_NUM_FMTS, }; @@ -20,6 +25,10 @@ enum io_pgtable_fmt { * @tlb_sync: Ensure any queued TLB invalidation has taken effect, and * any corresponding page table updates are visible to the * IOMMU. + * @alloc_pages_exact: Allocate page table memory (optional, defaults to + * alloc_pages_exact) + * @free_pages_exact: Free page table memory (optional, defaults to + * free_pages_exact) * * Note that these can all be called in atomic context and must therefore * not block. @@ -29,6 +38,8 @@ struct iommu_gather_ops { void (*tlb_add_flush)(unsigned long iova, size_t size, bool leaf, void *cookie); void (*tlb_sync)(void *cookie); + void *(*alloc_pages_exact)(void *cookie, size_t size, gfp_t gfp_mask); + void (*free_pages_exact)(void *cookie, void *virt, size_t size); }; /** @@ -45,13 +56,22 @@ struct iommu_gather_ops { * page table walker. */ struct io_pgtable_cfg { + /* + * IO_PGTABLE_QUIRK_PAGE_TABLE_COHERENT: Set the page table as + * coherent. + */ #define IO_PGTABLE_QUIRK_ARM_NS (1 << 0) /* Set NS bit in PTEs */ + #define IO_PGTABLE_QUIRK_PAGE_TABLE_COHERENT (1 << 1) + #define IO_PGTABLE_QUIRK_ARM_TTBR1 (1 << 2) /* Allocate TTBR1 PT */ int quirks; unsigned long pgsize_bitmap; unsigned int ias; unsigned int oas; + int sep; const struct iommu_gather_ops *tlb; struct device *iommu_dev; + dma_addr_t iova_base; + dma_addr_t iova_end; /* Low-level data specific to the table format */ union { @@ -65,6 +85,18 @@ struct io_pgtable_cfg { u64 vttbr; u64 vtcr; } arm_lpae_s2_cfg; + + struct { + enum tz_smmu_device_id sec_id; + int cbndx; + } arm_msm_secure_cfg; + + struct { + u64 ttbr[2]; + u64 tcr; + u64 mair[2]; + void *pmds; + } av8l_fast_cfg; }; }; @@ -72,6 +104,9 @@ struct io_pgtable_cfg { * struct io_pgtable_ops - Page table manipulation API for IOMMU drivers. * * @map: Map a physically contiguous memory region. + * @map_sg: Map a scatterlist. Returns the number of bytes mapped, + * or 0 on failure. The size parameter contains the size + * of the partial mapping in case of failure. * @unmap: Unmap a physically contiguous memory region. * @iova_to_phys: Translate iova to physical address. * @@ -81,10 +116,18 @@ struct io_pgtable_cfg { struct io_pgtable_ops { int (*map)(struct io_pgtable_ops *ops, unsigned long iova, phys_addr_t paddr, size_t size, int prot); - int (*unmap)(struct io_pgtable_ops *ops, unsigned long iova, - size_t size); + int (*map_sg)(struct io_pgtable_ops *ops, unsigned long iova, + struct scatterlist *sg, unsigned int nents, + int prot, size_t *size); + 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); + bool (*is_iova_coherent)(struct io_pgtable_ops *ops, + unsigned long iova); + uint64_t (*iova_to_pte)(struct io_pgtable_ops *ops, + unsigned long iova); + }; /** @@ -143,6 +186,28 @@ struct io_pgtable_init_fns { void (*free)(struct io_pgtable *iop); }; +/** + * io_pgtable_alloc_pages_exact - allocate an exact number physically-contiguous pages. + * @size: the number of bytes to allocate + * @gfp_mask: GFP flags for the allocation + * + * Like alloc_pages_exact(), but with some additional accounting for debug + * purposes. + */ +void *io_pgtable_alloc_pages_exact(struct io_pgtable_cfg *cfg, void *cookie, + size_t size, gfp_t gfp_mask); + +/** + * io_pgtable_free_pages_exact - release memory allocated via io_pgtable_alloc_pages_exact() + * @virt: the value returned by alloc_pages_exact. + * @size: size of allocation, same value as passed to alloc_pages_exact(). + * + * Like free_pages_exact(), but with some additional accounting for debug + * purposes. + */ +void io_pgtable_free_pages_exact(struct io_pgtable_cfg *cfg, void *cookie, + void *virt, size_t size); + 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; |