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 #include "i915_buddy.h" 17 18 struct drm_i915_private; 19 struct drm_i915_gem_object; 20 struct intel_memory_region; 21 struct sg_table; 22 23 enum intel_memory_type { 24 INTEL_MEMORY_SYSTEM = I915_MEMORY_CLASS_SYSTEM, 25 INTEL_MEMORY_LOCAL = I915_MEMORY_CLASS_DEVICE, 26 INTEL_MEMORY_STOLEN_SYSTEM, 27 INTEL_MEMORY_STOLEN_LOCAL, 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 { 63 struct drm_i915_private *i915; 64 65 const struct intel_memory_region_ops *ops; 66 67 struct io_mapping iomap; 68 struct resource region; 69 70 /* For fake LMEM */ 71 struct drm_mm_node fake_mappable; 72 73 struct i915_buddy_mm mm; 74 struct mutex mm_lock; 75 76 struct kref kref; 77 78 resource_size_t io_start; 79 resource_size_t min_page_size; 80 resource_size_t total; 81 resource_size_t avail; 82 83 u16 type; 84 u16 instance; 85 enum intel_region_id id; 86 char name[16]; 87 bool private; /* not for userspace */ 88 89 struct list_head reserved; 90 91 dma_addr_t remap_addr; 92 93 struct { 94 struct mutex lock; /* Protects access to objects */ 95 struct list_head list; 96 struct list_head purgeable; 97 } objects; 98 }; 99 100 struct intel_memory_region * 101 intel_memory_region_lookup(struct drm_i915_private *i915, 102 u16 class, u16 instance); 103 104 int intel_memory_region_init_buddy(struct intel_memory_region *mem); 105 void intel_memory_region_release_buddy(struct intel_memory_region *mem); 106 107 int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, 108 resource_size_t size, 109 unsigned int flags, 110 struct list_head *blocks); 111 struct i915_buddy_block * 112 __intel_memory_region_get_block_buddy(struct intel_memory_region *mem, 113 resource_size_t size, 114 unsigned int flags); 115 void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem, 116 struct list_head *blocks); 117 void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block); 118 119 int intel_memory_region_reserve(struct intel_memory_region *mem, 120 u64 offset, u64 size); 121 122 struct intel_memory_region * 123 intel_memory_region_create(struct drm_i915_private *i915, 124 resource_size_t start, 125 resource_size_t size, 126 resource_size_t min_page_size, 127 resource_size_t io_start, 128 const struct intel_memory_region_ops *ops); 129 130 struct intel_memory_region * 131 intel_memory_region_get(struct intel_memory_region *mem); 132 void intel_memory_region_put(struct intel_memory_region *mem); 133 134 int intel_memory_regions_hw_probe(struct drm_i915_private *i915); 135 void intel_memory_regions_driver_release(struct drm_i915_private *i915); 136 struct intel_memory_region * 137 intel_memory_region_by_type(struct drm_i915_private *i915, 138 enum intel_memory_type mem_type); 139 140 __printf(2, 3) void 141 intel_memory_region_set_name(struct intel_memory_region *mem, 142 const char *fmt, ...); 143 144 #endif 145