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
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/pagemap.h>
#include <linux/slab.h>
#include "nouveau_drv.h"
#include "nouveau_mem.h"
#include "nouveau_ttm.h"
struct nouveau_sgdma_be {
/* this has to be the first field so populate/unpopulated in
* nouve_bo.c works properly, otherwise have to move them here
*/
struct ttm_dma_tt ttm;
struct nouveau_mem *mem;
};
static void
nouveau_sgdma_destroy(struct ttm_tt *ttm)
{
struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
if (ttm) {
ttm_dma_tt_fini(&nvbe->ttm);
kfree(nvbe);
}
}
static int
nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
{
struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
struct nouveau_mem *mem = nouveau_mem(reg);
int ret;
ret = nouveau_mem_host(reg, &nvbe->ttm);
if (ret)
return ret;
ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
if (ret) {
nouveau_mem_fini(mem);
return ret;
}
nvbe->mem = mem;
return 0;
}
static int
nv04_sgdma_unbind(struct ttm_tt *ttm)
{
struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
nouveau_mem_fini(nvbe->mem);
return 0;
}
static struct ttm_backend_func nv04_sgdma_backend = {
.bind = nv04_sgdma_bind,
.unbind = nv04_sgdma_unbind,
.destroy = nouveau_sgdma_destroy
};
static int
nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
{
struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
struct nouveau_mem *mem = nouveau_mem(reg);
int ret;
ret = nouveau_mem_host(reg, &nvbe->ttm);
if (ret)
return ret;
nvbe->mem = mem;
return 0;
}
static struct ttm_backend_func nv50_sgdma_backend = {
.bind = nv50_sgdma_bind,
.unbind = nv04_sgdma_unbind,
.destroy = nouveau_sgdma_destroy
};
struct ttm_tt *
nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
unsigned long size, uint32_t page_flags,
struct page *dummy_read_page)
{
struct nouveau_drm *drm = nouveau_bdev(bdev);
struct nouveau_sgdma_be *nvbe;
nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
if (!nvbe)
return NULL;
if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
nvbe->ttm.ttm.func = &nv04_sgdma_backend;
else
nvbe->ttm.ttm.func = &nv50_sgdma_backend;
if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
/*
* A failing ttm_dma_tt_init() will call ttm_tt_destroy()
* and thus our nouveau_sgdma_destroy() hook, so we don't need
* to free nvbe here.
*/
return NULL;
return &nvbe->ttm.ttm;
}
|
