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 struct drm_i915_private;
17 struct drm_i915_gem_object;
18 struct intel_memory_region;
22 enum intel_memory_type {
23 INTEL_MEMORY_SYSTEM = I915_MEMORY_CLASS_SYSTEM,
24 INTEL_MEMORY_LOCAL = I915_MEMORY_CLASS_DEVICE,
25 INTEL_MEMORY_STOLEN_SYSTEM,
26 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_private_ops {
63 struct ttm_resource *(*reserve)(struct intel_memory_region *mem,
64 resource_size_t offset,
65 resource_size_t size);
66 void (*free)(struct intel_memory_region *mem,
67 struct ttm_resource *res);
70 struct intel_memory_region {
71 struct drm_i915_private *i915;
73 const struct intel_memory_region_ops *ops;
74 const struct intel_memory_region_private_ops *priv_ops;
76 struct io_mapping iomap;
77 struct resource region;
80 struct drm_mm_node fake_mappable;
86 resource_size_t io_start;
87 resource_size_t min_page_size;
88 resource_size_t total;
89 resource_size_t avail;
93 enum intel_region_id id;
95 bool private; /* not for userspace */
97 struct list_head reserved;
99 dma_addr_t remap_addr;
102 struct mutex lock; /* Protects access to objects */
103 struct list_head list;
104 struct list_head purgeable;
108 unsigned int max_order;
109 bool is_range_manager;
111 void *region_private;
114 struct intel_memory_region *
115 intel_memory_region_lookup(struct drm_i915_private *i915,
116 u16 class, u16 instance);
118 struct intel_memory_region *
119 intel_memory_region_create(struct drm_i915_private *i915,
120 resource_size_t start,
121 resource_size_t size,
122 resource_size_t min_page_size,
123 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, ...);
142 void intel_memory_region_unreserve(struct intel_memory_region *mem);
144 int intel_memory_region_reserve(struct intel_memory_region *mem,
145 resource_size_t offset,
146 resource_size_t size);