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/ioport.h>
10#include <linux/mutex.h>
11#include <linux/io-mapping.h>
12#include <drm/drm_mm.h>
13#include <uapi/drm/i915_drm.h>
14
15struct drm_i915_private;
16struct drm_i915_gem_object;
17struct drm_printer;
18struct intel_memory_region;
19struct sg_table;
20struct ttm_resource;
21
22enum 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,
27 INTEL_MEMORY_MOCK,
28};
29
30enum intel_region_id {
31 INTEL_REGION_SMEM = 0,
32 INTEL_REGION_LMEM_0,
33 INTEL_REGION_LMEM_1,
34 INTEL_REGION_LMEM_2,
35 INTEL_REGION_LMEM_3,
36 INTEL_REGION_STOLEN_SMEM,
37 INTEL_REGION_STOLEN_LMEM,
38 INTEL_REGION_UNKNOWN, /* Should be last */
39};
40
41#define REGION_SMEM BIT(INTEL_REGION_SMEM)
42#define REGION_LMEM BIT(INTEL_REGION_LMEM_0)
43#define REGION_STOLEN_SMEM BIT(INTEL_REGION_STOLEN_SMEM)
44#define REGION_STOLEN_LMEM BIT(INTEL_REGION_STOLEN_LMEM)
45
46#define I915_ALLOC_CONTIGUOUS BIT(0)
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
52struct intel_memory_region_ops {
53 unsigned int flags;
54
55 int (*init)(struct intel_memory_region *mem);
56 int (*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 offset,
61 resource_size_t size,
62 resource_size_t page_size,
63 unsigned int flags);
64};
65
66struct intel_memory_region {
67 struct drm_i915_private *i915;
68
69 const struct intel_memory_region_ops *ops;
70
71 struct io_mapping iomap;
72 struct resource region;
73
74 resource_size_t io_start;
75 resource_size_t io_size;
76 resource_size_t min_page_size;
77 resource_size_t total;
78
79 u16 type;
80 u16 instance;
81 enum intel_region_id id;
82 char name[16];
83 bool private; /* not for userspace */
84
85 struct {
86 struct mutex lock; /* Protects access to objects */
87 struct list_head list;
88 } objects;
89
90 bool is_range_manager;
91
92 void *region_private;
93};
94
95struct intel_memory_region *
96intel_memory_region_lookup(struct drm_i915_private *i915,
97 u16 class, u16 instance);
98
99struct intel_memory_region *
100intel_memory_region_create(struct drm_i915_private *i915,
101 resource_size_t start,
102 resource_size_t size,
103 resource_size_t min_page_size,
104 resource_size_t io_start,
105 resource_size_t io_size,
106 u16 type,
107 u16 instance,
108 const struct intel_memory_region_ops *ops);
109
110void intel_memory_region_destroy(struct intel_memory_region *mem);
111
112int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
113void intel_memory_regions_driver_release(struct drm_i915_private *i915);
114struct intel_memory_region *
115intel_memory_region_by_type(struct drm_i915_private *i915,
116 enum intel_memory_type mem_type);
117
118__printf(2, 3) void
119intel_memory_region_set_name(struct intel_memory_region *mem,
120 const char *fmt, ...);
121
122int intel_memory_region_reserve(struct intel_memory_region *mem,
123 resource_size_t offset,
124 resource_size_t size);
125
126void intel_memory_region_debug(struct intel_memory_region *mr,
127 struct drm_printer *printer);
128
129void intel_memory_region_avail(struct intel_memory_region *mr,
130 u64 *avail, u64 *visible_avail);
131
132struct intel_memory_region *
133i915_gem_ttm_system_setup(struct drm_i915_private *i915,
134 u16 type, u16 instance);
135struct intel_memory_region *
136i915_gem_shmem_setup(struct drm_i915_private *i915,
137 u16 type, u16 instance);
138
139#endif
140

source code of linux/drivers/gpu/drm/i915/intel_memory_region.h