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
|
// SPDX-License-Identifier: GPL-2.0 OR MIT
/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
#include <drm/drm_prime.h>
#include <linux/pagemap.h>
#include <linux/dma-mapping.h>
#include "lima_object.h"
void lima_bo_destroy(struct lima_bo *bo)
{
if (bo->sgt) {
kfree(bo->pages);
drm_prime_gem_destroy(&bo->gem, bo->sgt);
} else {
if (bo->pages_dma_addr) {
int i, npages = bo->gem.size >> PAGE_SHIFT;
for (i = 0; i < npages; i++) {
if (bo->pages_dma_addr[i])
dma_unmap_page(bo->gem.dev->dev,
bo->pages_dma_addr[i],
PAGE_SIZE, DMA_BIDIRECTIONAL);
}
}
if (bo->pages)
drm_gem_put_pages(&bo->gem, bo->pages, true, true);
}
kfree(bo->pages_dma_addr);
drm_gem_object_release(&bo->gem);
kfree(bo);
}
static struct lima_bo *lima_bo_create_struct(struct lima_device *dev, u32 size, u32 flags)
{
struct lima_bo *bo;
int err;
size = PAGE_ALIGN(size);
bo = kzalloc(sizeof(*bo), GFP_KERNEL);
if (!bo)
return ERR_PTR(-ENOMEM);
mutex_init(&bo->lock);
INIT_LIST_HEAD(&bo->va);
err = drm_gem_object_init(dev->ddev, &bo->gem, size);
if (err) {
kfree(bo);
return ERR_PTR(err);
}
return bo;
}
struct lima_bo *lima_bo_create(struct lima_device *dev, u32 size,
u32 flags, struct sg_table *sgt)
{
int i, err;
size_t npages;
struct lima_bo *bo, *ret;
bo = lima_bo_create_struct(dev, size, flags);
if (IS_ERR(bo))
return bo;
npages = bo->gem.size >> PAGE_SHIFT;
bo->pages_dma_addr = kcalloc(npages, sizeof(dma_addr_t), GFP_KERNEL);
if (!bo->pages_dma_addr) {
ret = ERR_PTR(-ENOMEM);
goto err_out;
}
if (sgt) {
bo->sgt = sgt;
bo->pages = kcalloc(npages, sizeof(*bo->pages), GFP_KERNEL);
if (!bo->pages) {
ret = ERR_PTR(-ENOMEM);
goto err_out;
}
err = drm_prime_sg_to_page_addr_arrays(
sgt, bo->pages, bo->pages_dma_addr, npages);
if (err) {
ret = ERR_PTR(err);
goto err_out;
}
} else {
mapping_set_gfp_mask(bo->gem.filp->f_mapping, GFP_DMA32);
bo->pages = drm_gem_get_pages(&bo->gem);
if (IS_ERR(bo->pages)) {
ret = ERR_CAST(bo->pages);
bo->pages = NULL;
goto err_out;
}
for (i = 0; i < npages; i++) {
dma_addr_t addr = dma_map_page(dev->dev, bo->pages[i], 0,
PAGE_SIZE, DMA_BIDIRECTIONAL);
if (dma_mapping_error(dev->dev, addr)) {
ret = ERR_PTR(-EFAULT);
goto err_out;
}
bo->pages_dma_addr[i] = addr;
}
}
return bo;
err_out:
lima_bo_destroy(bo);
return ret;
}
|
