1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2019 Intel Corporation 4 */ 5 6 #ifndef __INTEL_MEMORY_REGION_H__ 7 #define __INTEL_MEMORY_REGION_H__ 8 9 #include <linux/kref.h> 10 #include <linux/ioport.h> 11 #include <linux/mutex.h> 12 #include <linux/io-mapping.h> 13 #include <drm/drm_mm.h> 14 #include <drm/i915_drm.h> 15 16 struct drm_i915_private; 17 struct drm_i915_gem_object; 18 struct intel_memory_region; 19 struct sg_table; 20 struct ttm_resource; 21 22 enum intel_memory_type { 23 INTEL_MEMORY_SYSTEM = I915_MEMORY_CLASS_SYSTEM, 24 INTEL_MEMORY_LOCAL = I915_MEMORY_CLASS_DEVICE, 25 INTEL_MEMORY_STOLEN_SYSTEM, 26 INTEL_MEMORY_STOLEN_LOCAL, 27 INTEL_MEMORY_MOCK, 28 }; 29 30 enum intel_region_id { 31 INTEL_REGION_SMEM = 0, 32 INTEL_REGION_LMEM, 33 INTEL_REGION_STOLEN_SMEM, 34 INTEL_REGION_STOLEN_LMEM, 35 INTEL_REGION_UNKNOWN, /* Should be last */ 36 }; 37 38 #define REGION_SMEM BIT(INTEL_REGION_SMEM) 39 #define REGION_LMEM BIT(INTEL_REGION_LMEM) 40 #define REGION_STOLEN_SMEM BIT(INTEL_REGION_STOLEN_SMEM) 41 #define REGION_STOLEN_LMEM BIT(INTEL_REGION_STOLEN_LMEM) 42 43 #define I915_ALLOC_MIN_PAGE_SIZE BIT(0) 44 #define I915_ALLOC_CONTIGUOUS BIT(1) 45 46 #define for_each_memory_region(mr, i915, id) \ 47 for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \ 48 for_each_if((mr) = (i915)->mm.regions[id]) 49 50 struct intel_memory_region_ops { 51 unsigned int flags; 52 53 int (*init)(struct intel_memory_region *mem); 54 void (*release)(struct intel_memory_region *mem); 55 56 int (*init_object)(struct intel_memory_region *mem, 57 struct drm_i915_gem_object *obj, 58 resource_size_t size, 59 unsigned int flags); 60 }; 61 62 struct intel_memory_region_private_ops { 63 struct ttm_resource *(*reserve)(struct intel_memory_region *mem, 64 resource_size_t offset, 65 resource_size_t size); 66 void (*free)(struct intel_memory_region *mem, 67 struct ttm_resource *res); 68 }; 69 70 struct intel_memory_region { 71 struct drm_i915_private *i915; 72 73 const struct intel_memory_region_ops *ops; 74 const struct intel_memory_region_private_ops *priv_ops; 75 76 struct io_mapping iomap; 77 struct resource region; 78 79 /* For fake LMEM */ 80 struct drm_mm_node fake_mappable; 81 82 struct mutex mm_lock; 83 84 struct kref kref; 85 86 resource_size_t io_start; 87 resource_size_t min_page_size; 88 resource_size_t total; 89 resource_size_t avail; 90 91 u16 type; 92 u16 instance; 93 enum intel_region_id id; 94 char name[16]; 95 bool private; /* not for userspace */ 96 97 struct list_head reserved; 98 99 dma_addr_t remap_addr; 100 101 struct { 102 struct mutex lock; /* Protects access to objects */ 103 struct list_head list; 104 struct list_head purgeable; 105 } objects; 106 107 size_t chunk_size; 108 unsigned int max_order; 109 bool is_range_manager; 110 111 void *region_private; 112 }; 113 114 struct intel_memory_region * 115 intel_memory_region_lookup(struct drm_i915_private *i915, 116 u16 class, u16 instance); 117 118 struct intel_memory_region * 119 intel_memory_region_create(struct drm_i915_private *i915, 120 resource_size_t start, 121 resource_size_t size, 122 resource_size_t min_page_size, 123 resource_size_t io_start, 124 u16 type, 125 u16 instance, 126 const struct intel_memory_region_ops *ops); 127 128 struct intel_memory_region * 129 intel_memory_region_get(struct intel_memory_region *mem); 130 void intel_memory_region_put(struct intel_memory_region *mem); 131 132 int intel_memory_regions_hw_probe(struct drm_i915_private *i915); 133 void intel_memory_regions_driver_release(struct drm_i915_private *i915); 134 struct intel_memory_region * 135 intel_memory_region_by_type(struct drm_i915_private *i915, 136 enum intel_memory_type mem_type); 137 138 __printf(2, 3) void 139 intel_memory_region_set_name(struct intel_memory_region *mem, 140 const char *fmt, ...); 141 142 void intel_memory_region_unreserve(struct intel_memory_region *mem); 143 144 int intel_memory_region_reserve(struct intel_memory_region *mem, 145 resource_size_t offset, 146 resource_size_t size); 147 #endif 148