| 1 | /* SPDX-License-Identifier: MIT */ |
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| 2 | /* |
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| 3 | * Copyright © 2025 Intel Corporation |
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| 4 | */ |
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| 5 | |
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| 6 | #ifndef _XE_VRAM_TYPES_H_ |
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| 7 | #define _XE_VRAM_TYPES_H_ |
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| 8 | |
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| 9 | #if IS_ENABLED(CONFIG_DRM_XE_PAGEMAP) |
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| 10 | #include <drm/drm_pagemap.h> |
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| 11 | #endif |
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| 12 | |
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| 13 | #include "xe_ttm_vram_mgr_types.h" |
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| 14 | |
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| 15 | struct xe_device; |
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| 16 | struct xe_migrate; |
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| 17 | |
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| 18 | /** |
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| 19 | * struct xe_vram_region - memory region structure |
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| 20 | * This is used to describe a memory region in xe |
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| 21 | * device, such as HBM memory or CXL extension memory. |
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| 22 | */ |
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| 23 | struct xe_vram_region { |
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| 24 | /** @xe: Back pointer to xe device */ |
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| 25 | struct xe_device *xe; |
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| 26 | /** |
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| 27 | * @id: VRAM region instance id |
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| 28 | * |
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| 29 | * The value should be unique for VRAM region. |
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| 30 | */ |
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| 31 | u8 id; |
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| 32 | /** @io_start: IO start address of this VRAM instance */ |
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| 33 | resource_size_t io_start; |
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| 34 | /** |
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| 35 | * @io_size: IO size of this VRAM instance |
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| 36 | * |
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| 37 | * This represents how much of this VRAM we can access |
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| 38 | * via the CPU through the VRAM BAR. This can be smaller |
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| 39 | * than @usable_size, in which case only part of VRAM is CPU |
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| 40 | * accessible (typically the first 256M). This |
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| 41 | * configuration is known as small-bar. |
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| 42 | */ |
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| 43 | resource_size_t io_size; |
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| 44 | /** @dpa_base: This memory regions's DPA (device physical address) base */ |
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| 45 | resource_size_t dpa_base; |
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| 46 | /** |
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| 47 | * @usable_size: usable size of VRAM |
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| 48 | * |
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| 49 | * Usable size of VRAM excluding reserved portions |
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| 50 | * (e.g stolen mem) |
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| 51 | */ |
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| 52 | resource_size_t usable_size; |
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| 53 | /** |
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| 54 | * @actual_physical_size: Actual VRAM size |
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| 55 | * |
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| 56 | * Actual VRAM size including reserved portions |
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| 57 | * (e.g stolen mem) |
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| 58 | */ |
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| 59 | resource_size_t actual_physical_size; |
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| 60 | /** @mapping: pointer to VRAM mappable space */ |
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| 61 | void __iomem *mapping; |
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| 62 | /** @ttm: VRAM TTM manager */ |
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| 63 | struct xe_ttm_vram_mgr ttm; |
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| 64 | /** @placement: TTM placement dedicated for this region */ |
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| 65 | u32 placement; |
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| 66 | #if IS_ENABLED(CONFIG_DRM_XE_PAGEMAP) |
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| 67 | /** @migrate: Back pointer to migrate */ |
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| 68 | struct xe_migrate *migrate; |
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| 69 | /** @pagemap: Used to remap device memory as ZONE_DEVICE */ |
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| 70 | struct dev_pagemap pagemap; |
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| 71 | /** |
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| 72 | * @dpagemap: The struct drm_pagemap of the ZONE_DEVICE memory |
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| 73 | * pages of this tile. |
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| 74 | */ |
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| 75 | struct drm_pagemap dpagemap; |
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| 76 | /** |
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| 77 | * @hpa_base: base host physical address |
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| 78 | * |
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| 79 | * This is generated when remap device memory as ZONE_DEVICE |
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| 80 | */ |
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| 81 | resource_size_t hpa_base; |
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| 82 | #endif |
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| 83 | }; |
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| 84 | |
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| 85 | #endif |
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| 86 | |
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