1
2#include <linux/pagemap.h>
3#include <linux/slab.h>
4
5#include "nouveau_drv.h"
6#include "nouveau_mem.h"
7#include "nouveau_ttm.h"
8
9struct nouveau_sgdma_be {
10
11
12
13 struct ttm_dma_tt ttm;
14 struct nouveau_mem *mem;
15};
16
17static void
18nouveau_sgdma_destroy(struct ttm_tt *ttm)
19{
20 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
21
22 if (ttm) {
23 ttm_dma_tt_fini(&nvbe->ttm);
24 kfree(nvbe);
25 }
26}
27
28static int
29nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
30{
31 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
32 struct nouveau_mem *mem = nouveau_mem(reg);
33 int ret;
34
35 ret = nouveau_mem_host(reg, &nvbe->ttm);
36 if (ret)
37 return ret;
38
39 ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
40 if (ret) {
41 nouveau_mem_fini(mem);
42 return ret;
43 }
44
45 nvbe->mem = mem;
46 return 0;
47}
48
49static int
50nv04_sgdma_unbind(struct ttm_tt *ttm)
51{
52 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
53 nouveau_mem_fini(nvbe->mem);
54 return 0;
55}
56
57static struct ttm_backend_func nv04_sgdma_backend = {
58 .bind = nv04_sgdma_bind,
59 .unbind = nv04_sgdma_unbind,
60 .destroy = nouveau_sgdma_destroy
61};
62
63static int
64nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
65{
66 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
67 struct nouveau_mem *mem = nouveau_mem(reg);
68 int ret;
69
70 ret = nouveau_mem_host(reg, &nvbe->ttm);
71 if (ret)
72 return ret;
73
74 nvbe->mem = mem;
75 return 0;
76}
77
78static struct ttm_backend_func nv50_sgdma_backend = {
79 .bind = nv50_sgdma_bind,
80 .unbind = nv04_sgdma_unbind,
81 .destroy = nouveau_sgdma_destroy
82};
83
84struct ttm_tt *
85nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags)
86{
87 struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
88 struct nouveau_sgdma_be *nvbe;
89
90 nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
91 if (!nvbe)
92 return NULL;
93
94 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
95 nvbe->ttm.ttm.func = &nv04_sgdma_backend;
96 else
97 nvbe->ttm.ttm.func = &nv50_sgdma_backend;
98
99 if (ttm_dma_tt_init(&nvbe->ttm, bo, page_flags))
100
101
102
103
104
105 return NULL;
106 return &nvbe->ttm.ttm;
107}
108