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 INTEL_MEMORY_STOLEN_LOCAL, 30 }; 31 32 enum intel_region_id { 33 INTEL_REGION_SMEM = 0, 34 INTEL_REGION_LMEM, 35 INTEL_REGION_STOLEN_SMEM, 36 INTEL_REGION_STOLEN_LMEM, 37 INTEL_REGION_UNKNOWN, /* Should be last */ 38 }; 39 40 #define REGION_SMEM BIT(INTEL_REGION_SMEM) 41 #define REGION_LMEM BIT(INTEL_REGION_LMEM) 42 #define REGION_STOLEN_SMEM BIT(INTEL_REGION_STOLEN_SMEM) 43 #define REGION_STOLEN_LMEM BIT(INTEL_REGION_STOLEN_LMEM) 44 45 #define I915_ALLOC_MIN_PAGE_SIZE BIT(0) 46 #define I915_ALLOC_CONTIGUOUS BIT(1) 47 48 #define for_each_memory_region(mr, i915, id) \ 49 for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \ 50 for_each_if((mr) = (i915)->mm.regions[id]) 51 52 struct intel_memory_region_ops { 53 unsigned int flags; 54 55 int (*init)(struct intel_memory_region *mem); 56 void (*release)(struct intel_memory_region *mem); 57 58 int (*init_object)(struct intel_memory_region *mem, 59 struct drm_i915_gem_object *obj, 60 resource_size_t size, 61 unsigned int flags); 62 }; 63 64 struct intel_memory_region { 65 struct drm_i915_private *i915; 66 67 const struct intel_memory_region_ops *ops; 68 69 struct io_mapping iomap; 70 struct resource region; 71 72 /* For fake LMEM */ 73 struct drm_mm_node fake_mappable; 74 75 struct i915_buddy_mm mm; 76 struct mutex mm_lock; 77 78 struct kref kref; 79 80 resource_size_t io_start; 81 resource_size_t min_page_size; 82 resource_size_t total; 83 resource_size_t avail; 84 85 u16 type; 86 u16 instance; 87 enum intel_region_id id; 88 char name[16]; 89 bool private; /* not for userspace */ 90 91 struct list_head reserved; 92 93 dma_addr_t remap_addr; 94 95 struct { 96 struct mutex lock; /* Protects access to objects */ 97 struct list_head list; 98 struct list_head purgeable; 99 } objects; 100 }; 101 102 int intel_memory_region_init_buddy(struct intel_memory_region *mem); 103 void intel_memory_region_release_buddy(struct intel_memory_region *mem); 104 105 int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, 106 resource_size_t size, 107 unsigned int flags, 108 struct list_head *blocks); 109 struct i915_buddy_block * 110 __intel_memory_region_get_block_buddy(struct intel_memory_region *mem, 111 resource_size_t size, 112 unsigned int flags); 113 void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem, 114 struct list_head *blocks); 115 void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block); 116 117 int intel_memory_region_reserve(struct intel_memory_region *mem, 118 u64 offset, u64 size); 119 120 struct intel_memory_region * 121 intel_memory_region_create(struct drm_i915_private *i915, 122 resource_size_t start, 123 resource_size_t size, 124 resource_size_t min_page_size, 125 resource_size_t io_start, 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 #endif 143