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>
14 #include <drm/i915_drm.h>
16 #include "i915_buddy.h"
18 struct drm_i915_private;
19 struct drm_i915_gem_object;
20 struct intel_memory_region;
23 enum intel_memory_type {
24 INTEL_MEMORY_SYSTEM = I915_MEMORY_CLASS_SYSTEM,
25 INTEL_MEMORY_LOCAL = I915_MEMORY_CLASS_DEVICE,
26 INTEL_MEMORY_STOLEN_SYSTEM,
27 INTEL_MEMORY_STOLEN_LOCAL,
30 enum intel_region_id {
31 INTEL_REGION_SMEM = 0,
33 INTEL_REGION_STOLEN_SMEM,
34 INTEL_REGION_STOLEN_LMEM,
35 INTEL_REGION_UNKNOWN, /* Should be last */
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 #define REGION_STOLEN_LMEM BIT(INTEL_REGION_STOLEN_LMEM)
43 #define I915_ALLOC_MIN_PAGE_SIZE BIT(0)
44 #define I915_ALLOC_CONTIGUOUS BIT(1)
46 #define for_each_memory_region(mr, i915, id) \
47 for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \
48 for_each_if((mr) = (i915)->mm.regions[id])
50 struct intel_memory_region_ops {
53 int (*init)(struct intel_memory_region *mem);
54 void (*release)(struct intel_memory_region *mem);
56 int (*init_object)(struct intel_memory_region *mem,
57 struct drm_i915_gem_object *obj,
62 struct intel_memory_region {
63 struct drm_i915_private *i915;
65 const struct intel_memory_region_ops *ops;
67 struct io_mapping iomap;
68 struct resource region;
71 struct drm_mm_node fake_mappable;
73 struct i915_buddy_mm mm;
78 resource_size_t io_start;
79 resource_size_t min_page_size;
80 resource_size_t total;
81 resource_size_t avail;
85 enum intel_region_id id;
87 bool private; /* not for userspace */
89 struct list_head reserved;
91 dma_addr_t remap_addr;
94 struct mutex lock; /* Protects access to objects */
95 struct list_head list;
96 struct list_head purgeable;
100 struct intel_memory_region *
101 intel_memory_region_lookup(struct drm_i915_private *i915,
102 u16 class, u16 instance);
104 int intel_memory_region_init_buddy(struct intel_memory_region *mem);
105 void intel_memory_region_release_buddy(struct intel_memory_region *mem);
107 int __intel_memory_region_get_pages_buddy(struct intel_memory_region *mem,
108 resource_size_t size,
110 struct list_head *blocks);
111 struct i915_buddy_block *
112 __intel_memory_region_get_block_buddy(struct intel_memory_region *mem,
113 resource_size_t size,
115 void __intel_memory_region_put_pages_buddy(struct intel_memory_region *mem,
116 struct list_head *blocks);
117 void __intel_memory_region_put_block_buddy(struct i915_buddy_block *block);
119 int intel_memory_region_reserve(struct intel_memory_region *mem,
120 u64 offset, u64 size);
122 struct intel_memory_region *
123 intel_memory_region_create(struct drm_i915_private *i915,
124 resource_size_t start,
125 resource_size_t size,
126 resource_size_t min_page_size,
127 resource_size_t io_start,
128 const struct intel_memory_region_ops *ops);
130 struct intel_memory_region *
131 intel_memory_region_get(struct intel_memory_region *mem);
132 void intel_memory_region_put(struct intel_memory_region *mem);
134 int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
135 void intel_memory_regions_driver_release(struct drm_i915_private *i915);
136 struct intel_memory_region *
137 intel_memory_region_by_type(struct drm_i915_private *i915,
138 enum intel_memory_type mem_type);
141 intel_memory_region_set_name(struct intel_memory_region *mem,
142 const char *fmt, ...);