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 I915_ALLOC_CONTIGUOUS BIT(0)
42
43#define for_each_memory_region(mr, i915, id) \
44 for (id = 0; id < ARRAY_SIZE((i915)->mm.regions); id++) \
45 for_each_if((mr) = (i915)->mm.regions[id])
46
47struct intel_memory_region_ops {
48 int (*init)(struct intel_memory_region *mem);
49 int (*release)(struct intel_memory_region *mem);
50
51 int (*init_object)(struct intel_memory_region *mem,
52 struct drm_i915_gem_object *obj,
53 resource_size_t offset,
54 resource_size_t size,
55 resource_size_t page_size,
56 unsigned int flags);
57};
58
59struct intel_memory_region {
60 struct drm_i915_private *i915;
61
62 const struct intel_memory_region_ops *ops;
63
64 struct io_mapping iomap;
65 struct resource region;
66
67 struct resource io;
68 resource_size_t min_page_size;
69 resource_size_t total;
70
71 u16 type;
72 u16 instance;
73 enum intel_region_id id;
74 char name[16];
75 char uabi_name[16];
76 bool private; /* not for userspace */
77
78 struct {
79 struct mutex lock; /* Protects access to objects */
80 struct list_head list;
81 } objects;
82
83 bool is_range_manager;
84
85 void *region_private;
86};
87
88bool intel_memory_type_is_local(enum intel_memory_type mem_type);
89
90struct intel_memory_region *
91intel_memory_region_lookup(struct drm_i915_private *i915,
92 u16 class, u16 instance);
93
94struct intel_memory_region *
95intel_memory_region_create(struct drm_i915_private *i915,
96 resource_size_t start,
97 resource_size_t size,
98 resource_size_t min_page_size,
99 resource_size_t io_start,
100 resource_size_t io_size,
101 u16 type,
102 u16 instance,
103 const struct intel_memory_region_ops *ops);
104
105void intel_memory_region_destroy(struct intel_memory_region *mem);
106
107int intel_memory_regions_hw_probe(struct drm_i915_private *i915);
108void intel_memory_regions_driver_release(struct drm_i915_private *i915);
109struct intel_memory_region *
110intel_memory_region_by_type(struct drm_i915_private *i915,
111 enum intel_memory_type mem_type);
112const char *intel_memory_type_str(enum intel_memory_type type);
113
114__printf(2, 3) void
115intel_memory_region_set_name(struct intel_memory_region *mem,
116 const char *fmt, ...);
117
118int intel_memory_region_reserve(struct intel_memory_region *mem,
119 resource_size_t offset,
120 resource_size_t size);
121
122void intel_memory_region_debug(struct intel_memory_region *mr,
123 struct drm_printer *printer);
124
125void intel_memory_region_avail(struct intel_memory_region *mr,
126 u64 *avail, u64 *visible_avail);
127
128struct intel_memory_region *
129i915_gem_ttm_system_setup(struct drm_i915_private *i915,
130 u16 type, u16 instance);
131struct intel_memory_region *
132i915_gem_shmem_setup(struct drm_i915_private *i915,
133 u16 type, u16 instance);
134
135#endif
136

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