| 1 |
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| 2 | |
| 3 | * Tegra host1x GEM implementation
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| 4 | *
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| 5 | * Copyright (c) 2012-2013, NVIDIA Corporation.
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| 6 |
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| 7 |
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| 8 | #ifndef __HOST1X_GEM_H
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| 9 | #define __HOST1X_GEM_H
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| 10 |
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| 11 | #include <linux/host1x.h>
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| 12 |
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| 13 | #include <drm/drm.h>
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| 14 | #include <drm/drm_gem.h>
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| 15 |
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| 16 | #define TEGRA_BO_BOTTOM_UP (1 << 0)
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| 17 |
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| 18 | enum tegra_bo_tiling_mode {
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| 19 | TEGRA_BO_TILING_MODE_PITCH,
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| 20 | TEGRA_BO_TILING_MODE_TILED,
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| 21 | TEGRA_BO_TILING_MODE_BLOCK,
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| 22 | };
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| 23 |
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| 24 | enum tegra_bo_sector_layout {
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| 25 | TEGRA_BO_SECTOR_LAYOUT_TEGRA,
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| 26 | TEGRA_BO_SECTOR_LAYOUT_GPU,
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| 27 | };
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| 28 |
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| 29 | struct tegra_bo_tiling {
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| 30 | enum tegra_bo_tiling_mode mode;
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| 31 | unsigned long value;
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| 32 | enum tegra_bo_sector_layout sector_layout;
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| 33 | };
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| 34 |
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| 35 | |
| 36 | * How memory is referenced within a tegra_bo:
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| 37 | *
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| 38 | * Buffer source | Mapping API(*) | Fields
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| 39 | * ---------------+-----------------+---------------
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| 40 | * Allocated here | DMA API | iova (IOVA mapped to drm->dev), vaddr (CPU VA)
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| 41 | *
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| 42 | * Allocated here | IOMMU API | pages/num_pages (Phys. memory), sgt (Mapped to drm->dev),
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| 43 | * | iova/size (Mapped to domain)
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| 44 | *
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| 45 | * Imported | DMA API | dma_buf (Imported dma_buf)
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| 46 | *
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| 47 | * Imported | IOMMU API | dma_buf (Imported dma_buf),
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| 48 | * | gem->import_attach (Attachment on drm->dev),
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| 49 | * | sgt (Mapped to drm->dev)
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| 50 | * | iova/size (Mapped to domain)
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| 51 | *
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| 52 | * (*) If tegra->domain is set, i.e. TegraDRM IOMMU domain is directly managed through IOMMU API,
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| 53 | * this is IOMMU API. Otherwise DMA API.
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| 54 |
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| 55 | struct tegra_bo {
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| 56 | struct drm_gem_object gem;
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| 57 | struct host1x_bo base;
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| 58 | unsigned long flags;
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| 59 | struct sg_table *sgt;
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| 60 | dma_addr_t iova;
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| 61 | void *vaddr;
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| 62 | struct dma_buf *dma_buf;
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| 63 |
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| 64 | struct drm_mm_node *mm;
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| 65 | unsigned long num_pages;
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| 66 | struct page **pages;
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| 67 |
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| 68 | size_t size;
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| 69 |
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| 70 | struct tegra_bo_tiling tiling;
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| 71 | };
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| 72 |
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| 73 | static inline struct tegra_bo *to_tegra_bo(struct drm_gem_object *gem)
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| 74 | {
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| 75 | return container_of(gem, struct tegra_bo, gem);
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| 76 | }
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| 77 |
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| 78 | static inline struct tegra_bo *host1x_to_tegra_bo(struct host1x_bo *bo)
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| 79 | {
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| 80 | return container_of(bo, struct tegra_bo, base);
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| 81 | }
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| 82 |
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| 83 | struct tegra_bo *tegra_bo_create(struct drm_device *drm, size_t size,
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| 84 | unsigned long flags);
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| 85 | struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
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| 86 | struct drm_device *drm,
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| 87 | size_t size,
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| 88 | unsigned long flags,
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| 89 | u32 *handle);
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| 90 | void tegra_bo_free_object(struct drm_gem_object *gem);
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| 91 | int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm,
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| 92 | struct drm_mode_create_dumb *args);
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| 93 |
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| 94 | extern const struct vm_operations_struct tegra_bo_vm_ops;
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| 95 |
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| 96 | int __tegra_gem_mmap(struct drm_gem_object *gem, struct vm_area_struct *vma);
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| 97 | int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma);
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| 98 |
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| 99 | struct dma_buf *tegra_gem_prime_export(struct drm_gem_object *gem,
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| 100 | int flags);
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| 101 | struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm,
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| 102 | struct dma_buf *buf);
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| 103 |
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| 104 | struct host1x_bo *tegra_gem_lookup(struct drm_file *file, u32 handle);
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| 105 |
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| 106 | #endif
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