1 /* $NetBSD: intel_memory_region.h,v 1.2 2021/12/18 23:45:28 riastradh Exp $ */ 2 3 /* SPDX-License-Identifier: MIT */ 4 /* 5 * Copyright © 2019 Intel Corporation 6 */ 7 8 #ifndef __INTEL_MEMORY_REGION_H__ 9 #define __INTEL_MEMORY_REGION_H__ 10 11 #include <linux/kref.h> 12 #include <linux/ioport.h> 13 #include <linux/mutex.h> 14 #include <linux/io-mapping.h> 15 #include <drm/drm_mm.h> 16 17 #include "i915_buddy.h" 18 19 struct drm_i915_private; 20 struct drm_i915_gem_object; 21 struct intel_memory_region; 22 struct sg_table; 23 24 /** 25 * Base memory type 26 */ 27 enum intel_memory_type { 28 INTEL_MEMORY_SYSTEM = 0, 29 INTEL_MEMORY_LOCAL, 30 INTEL_MEMORY_STOLEN, 31 }; 32 33 enum intel_region_id { 34 INTEL_REGION_SMEM = 0, 35 INTEL_REGION_LMEM, 36 INTEL_REGION_STOLEN, 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 BIT(INTEL_REGION_STOLEN) 43 44 #define INTEL_MEMORY_TYPE_SHIFT 16 45 46 #define MEMORY_TYPE_FROM_REGION(r) (ilog2((r) >> INTEL_MEMORY_TYPE_SHIFT)) 47 #define MEMORY_INSTANCE_FROM_REGION(r) (ilog2((r) & 0xffff)) 48 49 #define I915_ALLOC_MIN_PAGE_SIZE BIT(0) 50 #define I915_ALLOC_CONTIGUOUS BIT(1) 51 52 #define for_each_memory_region(mr, i915, id) \ 53 for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \ 54 for_each_if((mr) = (i915)->mm.regions[id]) 55 56 /** 57 * Memory regions encoded as type | instance 58 */ 59 extern const u32 intel_region_map[]; 60 61 struct intel_memory_region_ops { 62 unsigned int flags; 63 64 int (*init)(struct intel_memory_region *mem); 65 void (*release)(struct intel_memory_region *mem); 66 67 struct drm_i915_gem_object * 68 (*create_object)(struct intel_memory_region *mem, 69 resource_size_t size, 70 unsigned int flags); 71 }; 72 73 struct intel_memory_region { 74 struct drm_i915_private *i915; 75 76 const struct intel_memory_region_ops *ops; 77 78 struct io_mapping iomap; 79 struct resource region; 80 81 /* For fake LMEM */ 82 struct drm_mm_node fake_mappable; 83 84 struct i915_buddy_mm mm; 85 struct mutex mm_lock; 86 87 struct kref kref; 88 89 resource_size_t io_start; 90 resource_size_t min_page_size; 91 resource_size_t total; 92 resource_size_t avail; 93 94 unsigned int type; 95 unsigned int instance; 96 unsigned int id; 97 char name[8]; 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 }; 107 108 int intel_memory_region_init_buddy(struct intel_memory_region *mem); 109 void intel_memory_region_release_buddy(struct intel_memory_region *mem); 110 111 int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem, 112 resource_size_t size, 113 unsigned int flags, 114 struct list_head *blocks); 115 struct i915_buddy_block * 116 __intel_memory_region_get_block_buddy(struct intel_memory_region *mem, 117 resource_size_t size, 118 unsigned int flags); 119 void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem, 120 struct list_head *blocks); 121 void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block); 122 123 struct intel_memory_region * 124 intel_memory_region_create(struct drm_i915_private *i915, 125 resource_size_t start, 126 resource_size_t size, 127 resource_size_t min_page_size, 128 resource_size_t io_start, 129 const struct intel_memory_region_ops *ops); 130 131 struct intel_memory_region * 132 intel_memory_region_get(struct intel_memory_region *mem); 133 void intel_memory_region_put(struct intel_memory_region *mem); 134 135 int intel_memory_regions_hw_probe(struct drm_i915_private *i915); 136 void intel_memory_regions_driver_release(struct drm_i915_private *i915); 137 struct intel_memory_region * 138 intel_memory_region_by_type(struct drm_i915_private *i915, 139 enum intel_memory_type mem_type); 140 141 __printf(2, 3) void 142 intel_memory_region_set_name(struct intel_memory_region *mem, 143 const char *fmt, ...); 144 145 #endif 146