1 /* SPDX-License-Identifier: MIT */
3 * Copyright © 2019 Intel Corporation
6 #ifndef __INTEL_MEMORY_REGION_H__
7 #define __INTEL_MEMORY_REGION_H__
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>
15 #include "i915_buddy.h"
17 struct drm_i915_private;
18 struct drm_i915_gem_object;
19 struct intel_memory_region;
25 enum intel_memory_type {
26 INTEL_MEMORY_SYSTEM = 0,
28 INTEL_MEMORY_STOLEN_SYSTEM,
29 INTEL_MEMORY_STOLEN_LOCAL,
32 enum intel_region_id {
33 INTEL_REGION_SMEM = 0,
35 INTEL_REGION_STOLEN_SMEM,
36 INTEL_REGION_STOLEN_LMEM,
37 INTEL_REGION_UNKNOWN, /* Should be last */
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)
45 #define I915_ALLOC_MIN_PAGE_SIZE BIT(0)
46 #define I915_ALLOC_CONTIGUOUS BIT(1)
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])
52 struct intel_memory_region_ops {
55 int (*init)(struct intel_memory_region *mem);
56 void (*release)(struct intel_memory_region *mem);
58 int (*init_object)(struct intel_memory_region *mem,
59 struct drm_i915_gem_object *obj,
64 struct intel_memory_region {
65 struct drm_i915_private *i915;
67 const struct intel_memory_region_ops *ops;
69 struct io_mapping iomap;
70 struct resource region;
73 struct drm_mm_node fake_mappable;
75 struct i915_buddy_mm mm;
80 resource_size_t io_start;
81 resource_size_t min_page_size;
82 resource_size_t total;
83 resource_size_t avail;
87 enum intel_region_id id;
89 bool private; /* not for userspace */
91 struct list_head reserved;
93 dma_addr_t remap_addr;
96 struct mutex lock; /* Protects access to objects */
97 struct list_head list;
98 struct list_head purgeable;
102 int intel_memory_region_init_buddy(struct intel_memory_region *mem);
103 void intel_memory_region_release_buddy(struct intel_memory_region *mem);
105 int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem,
106 resource_size_t size,
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,
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);
117 int intel_memory_region_reserve(struct intel_memory_region *mem,
118 u64 offset, u64 size);
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);
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);
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);
139 intel_memory_region_set_name(struct intel_memory_region *mem,
140 const char *fmt, ...);