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 15 #include "i915_buddy.h" 16 17 struct drm_i915_private; 18 struct drm_i915_gem_object; 19 struct intel_memory_region; 20 struct sg_table; 21 22 /** 23 * Base memory type 24 */ 25 enum intel_memory_type { 26 INTEL_MEMORY_SYSTEM = 0, 27 INTEL_MEMORY_LOCAL, 28 INTEL_MEMORY_STOLEN_SYSTEM, 29 }; 30 31 enum intel_region_id { 32 INTEL_REGION_SMEM = 0, 33 INTEL_REGION_LMEM, 34 INTEL_REGION_STOLEN_SMEM, 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 42 #define I915_ALLOC_MIN_PAGE_SIZE BIT(0) 43 #define I915_ALLOC_CONTIGUOUS BIT(1) 44 45 #define for_each_memory_region(mr, i915, id) \ 46 for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \ 47 for_each_if((mr) = (i915)->mm.regions[id]) 48 49 struct intel_memory_region_ops { 50 unsigned int flags; 51 52 int (*init)(struct intel_memory_region *mem); 53 void (*release)(struct intel_memory_region *mem); 54 55 int (*init_object)(struct intel_memory_region *mem, 56 struct drm_i915_gem_object *obj, 57 resource_size_t size, 58 unsigned int flags); 59 }; 60 61 struct intel_memory_region { 62 struct drm_i915_private *i915; 63 64 const struct intel_memory_region_ops *ops; 65 66 struct io_mapping iomap; 67 struct resource region; 68 69 /* For fake LMEM */ 70 struct drm_mm_node fake_mappable; 71 72 struct i915_buddy_mm mm; 73 struct mutex mm_lock; 74 75 struct kref kref; 76 77 resource_size_t io_start; 78 resource_size_t min_page_size; 79 resource_size_t total; 80 resource_size_t avail; 81 82 u16 type; 83 u16 instance; 84 enum intel_region_id id; 85 char name[8]; 86 87 struct list_head reserved; 88 89 dma_addr_t remap_addr; 90 91 struct { 92 struct mutex lock; /* Protects access to objects */ 93 struct list_head list; 94 struct list_head purgeable; 95 } objects; 96 }; 97 98 int intel_memory_region_init_buddy(struct intel_memory_region *mem); 99 void intel_memory_region_release_buddy(struct intel_memory_region *mem); 100 101 int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, 102 resource_size_t size, 103 unsigned int flags, 104 struct list_head *blocks); 105 struct i915_buddy_block * 106 __intel_memory_region_get_block_buddy(struct intel_memory_region *mem, 107 resource_size_t size, 108 unsigned int flags); 109 void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem, 110 struct list_head *blocks); 111 void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block); 112 113 int intel_memory_region_reserve(struct intel_memory_region *mem, 114 u64 offset, u64 size); 115 116 struct intel_memory_region * 117 intel_memory_region_create(struct drm_i915_private *i915, 118 resource_size_t start, 119 resource_size_t size, 120 resource_size_t min_page_size, 121 resource_size_t io_start, 122 const struct intel_memory_region_ops *ops); 123 124 struct intel_memory_region * 125 intel_memory_region_get(struct intel_memory_region *mem); 126 void intel_memory_region_put(struct intel_memory_region *mem); 127 128 int intel_memory_regions_hw_probe(struct drm_i915_private *i915); 129 void intel_memory_regions_driver_release(struct drm_i915_private *i915); 130 struct intel_memory_region * 131 intel_memory_region_by_type(struct drm_i915_private *i915, 132 enum intel_memory_type mem_type); 133 134 __printf(2, 3) void 135 intel_memory_region_set_name(struct intel_memory_region *mem, 136 const char *fmt, ...); 137 138 #endif 139