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, 29 }; 30 31 enum intel_region_id { 32 INTEL_REGION_SMEM = 0, 33 INTEL_REGION_LMEM, 34 INTEL_REGION_STOLEN, 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 BIT(INTEL_REGION_STOLEN) 41 42 #define INTEL_MEMORY_TYPE_SHIFT 16 43 44 #define MEMORY_TYPE_FROM_REGION(r) (ilog2((r) >> INTEL_MEMORY_TYPE_SHIFT)) 45 #define MEMORY_INSTANCE_FROM_REGION(r) (ilog2((r) & 0xffff)) 46 47 #define I915_ALLOC_MIN_PAGE_SIZE BIT(0) 48 #define I915_ALLOC_CONTIGUOUS BIT(1) 49 50 #define for_each_memory_region(mr, i915, id) \ 51 for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \ 52 for_each_if((mr) = (i915)->mm.regions[id]) 53 54 /** 55 * Memory regions encoded as type | instance 56 */ 57 extern const u32 intel_region_map[]; 58 59 struct intel_memory_region_ops { 60 unsigned int flags; 61 62 int (*init)(struct intel_memory_region *mem); 63 void (*release)(struct intel_memory_region *mem); 64 65 struct drm_i915_gem_object * 66 (*create_object)(struct intel_memory_region *mem, 67 resource_size_t size, 68 unsigned int flags); 69 }; 70 71 struct intel_memory_region { 72 struct drm_i915_private *i915; 73 74 const struct intel_memory_region_ops *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 i915_buddy_mm mm; 83 struct mutex mm_lock; 84 85 struct kref kref; 86 87 resource_size_t io_start; 88 resource_size_t min_page_size; 89 resource_size_t total; 90 resource_size_t avail; 91 92 unsigned int type; 93 unsigned int instance; 94 unsigned int id; 95 char name[8]; 96 97 dma_addr_t remap_addr; 98 99 struct { 100 struct mutex lock; /* Protects access to objects */ 101 struct list_head list; 102 struct list_head purgeable; 103 } objects; 104 }; 105 106 int intel_memory_region_init_buddy(struct intel_memory_region *mem); 107 void intel_memory_region_release_buddy(struct intel_memory_region *mem); 108 109 int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, 110 resource_size_t size, 111 unsigned int flags, 112 struct list_head *blocks); 113 struct i915_buddy_block * 114 __intel_memory_region_get_block_buddy(struct intel_memory_region *mem, 115 resource_size_t size, 116 unsigned int flags); 117 void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem, 118 struct list_head *blocks); 119 void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block); 120 121 struct intel_memory_region * 122 intel_memory_region_create(struct drm_i915_private *i915, 123 resource_size_t start, 124 resource_size_t size, 125 resource_size_t min_page_size, 126 resource_size_t io_start, 127 const struct intel_memory_region_ops *ops); 128 129 struct intel_memory_region * 130 intel_memory_region_get(struct intel_memory_region *mem); 131 void intel_memory_region_put(struct intel_memory_region *mem); 132 133 int intel_memory_regions_hw_probe(struct drm_i915_private *i915); 134 void intel_memory_regions_driver_release(struct drm_i915_private *i915); 135 struct intel_memory_region * 136 intel_memory_region_by_type(struct drm_i915_private *i915, 137 enum intel_memory_type mem_type); 138 139 __printf(2, 3) void 140 intel_memory_region_set_name(struct intel_memory_region *mem, 141 const char *fmt, ...); 142 143 #endif 144