1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/dma-buf.h>
#include <linux/dma-mapping.h>
#include <drm/panfrost_drm.h>
#include "panfrost_device.h"
#include "panfrost_gem.h"
#include "panfrost_mmu.h"
/* Called DRM core on the last userspace/kernel unreference of the
* BO.
*/
static void panfrost_gem_free_object(struct drm_gem_object *obj)
{
struct panfrost_gem_object *bo = to_panfrost_bo(obj);
struct panfrost_device *pfdev = obj->dev->dev_private;
mutex_lock(&pfdev->shrinker_lock);
if (!list_empty(&bo->base.madv_list))
list_del(&bo->base.madv_list);
mutex_unlock(&pfdev->shrinker_lock);
drm_gem_shmem_free_object(obj);
}
static int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv)
{
int ret;
size_t size = obj->size;
u64 align;
struct panfrost_gem_object *bo = to_panfrost_bo(obj);
struct panfrost_device *pfdev = obj->dev->dev_private;
unsigned long color = bo->noexec ? PANFROST_BO_NOEXEC : 0;
/*
* Executable buffers cannot cross a 16MB boundary as the program
* counter is 24-bits. We assume executable buffers will be less than
* 16MB and aligning executable buffers to their size will avoid
* crossing a 16MB boundary.
*/
if (!bo->noexec)
align = size >> PAGE_SHIFT;
else
align = size >= SZ_2M ? SZ_2M >> PAGE_SHIFT : 0;
spin_lock(&pfdev->mm_lock);
ret = drm_mm_insert_node_generic(&pfdev->mm, &bo->node,
size >> PAGE_SHIFT, align, color, 0);
if (ret)
goto out;
ret = panfrost_mmu_map(bo);
if (ret)
drm_mm_remove_node(&bo->node);
out:
spin_unlock(&pfdev->mm_lock);
return ret;
}
static void panfrost_gem_close(struct drm_gem_object *obj, struct drm_file *file_priv)
{
struct panfrost_gem_object *bo = to_panfrost_bo(obj);
struct panfrost_device *pfdev = obj->dev->dev_private;
if (bo->is_mapped)
panfrost_mmu_unmap(bo);
spin_lock(&pfdev->mm_lock);
if (drm_mm_node_allocated(&bo->node))
drm_mm_remove_node(&bo->node);
spin_unlock(&pfdev->mm_lock);
}
static const struct drm_gem_object_funcs panfrost_gem_funcs = {
.free = panfrost_gem_free_object,
.open = panfrost_gem_open,
.close = panfrost_gem_close,
.print_info = drm_gem_shmem_print_info,
.pin = drm_gem_shmem_pin,
.unpin = drm_gem_shmem_unpin,
.get_sg_table = drm_gem_shmem_get_sg_table,
.vmap = drm_gem_shmem_vmap,
.vunmap = drm_gem_shmem_vunmap,
.vm_ops = &drm_gem_shmem_vm_ops,
};
/**
* panfrost_gem_create_object - Implementation of driver->gem_create_object.
* @dev: DRM device
* @size: Size in bytes of the memory the object will reference
*
* This lets the GEM helpers allocate object structs for us, and keep
* our BO stats correct.
*/
struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size)
{
struct panfrost_gem_object *obj;
obj = kzalloc(sizeof(*obj), GFP_KERNEL);
if (!obj)
return NULL;
obj->base.base.funcs = &panfrost_gem_funcs;
return &obj->base.base;
}
struct panfrost_gem_object *
panfrost_gem_create_with_handle(struct drm_file *file_priv,
struct drm_device *dev, size_t size,
u32 flags,
uint32_t *handle)
{
int ret;
struct drm_gem_shmem_object *shmem;
struct panfrost_gem_object *bo;
shmem = drm_gem_shmem_create(dev, size);
if (IS_ERR(shmem))
return ERR_CAST(shmem);
bo = to_panfrost_bo(&shmem->base);
bo->noexec = !!(flags & PANFROST_BO_NOEXEC);
/*
* Allocate an id of idr table where the obj is registered
* and handle has the id what user can see.
*/
ret = drm_gem_handle_create(file_priv, &shmem->base, handle);
/* drop reference from allocate - handle holds it now. */
drm_gem_object_put_unlocked(&shmem->base);
if (ret)
return ERR_PTR(ret);
return bo;
}
struct drm_gem_object *
panfrost_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sgt)
{
struct drm_gem_object *obj;
struct panfrost_gem_object *bo;
obj = drm_gem_shmem_prime_import_sg_table(dev, attach, sgt);
if (IS_ERR(obj))
return ERR_CAST(obj);
bo = to_panfrost_bo(obj);
bo->noexec = true;
return obj;
}
|
