[go: nahoru, domu]
1#include <linux/pagemap.h>
2#include <linux/slab.h>
3
4#include "nouveau_drm.h"
5#include "nouveau_ttm.h"
6
7struct nouveau_sgdma_be {
8	/* this has to be the first field so populate/unpopulated in
9	 * nouve_bo.c works properly, otherwise have to move them here
10	 */
11	struct ttm_dma_tt ttm;
12	struct drm_device *dev;
13	struct nouveau_mem *node;
14};
15
16static void
17nouveau_sgdma_destroy(struct ttm_tt *ttm)
18{
19	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
20
21	if (ttm) {
22		ttm_dma_tt_fini(&nvbe->ttm);
23		kfree(nvbe);
24	}
25}
26
27static int
28nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
29{
30	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
31	struct nouveau_mem *node = mem->mm_node;
32
33	if (ttm->sg) {
34		node->sg    = ttm->sg;
35		node->pages = NULL;
36	} else {
37		node->sg    = NULL;
38		node->pages = nvbe->ttm.dma_address;
39	}
40	node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
41
42	nouveau_vm_map(&node->vma[0], node);
43	nvbe->node = node;
44	return 0;
45}
46
47static int
48nv04_sgdma_unbind(struct ttm_tt *ttm)
49{
50	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
51	nouveau_vm_unmap(&nvbe->node->vma[0]);
52	return 0;
53}
54
55static struct ttm_backend_func nv04_sgdma_backend = {
56	.bind			= nv04_sgdma_bind,
57	.unbind			= nv04_sgdma_unbind,
58	.destroy		= nouveau_sgdma_destroy
59};
60
61static int
62nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
63{
64	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
65	struct nouveau_mem *node = mem->mm_node;
66
67	/* noop: bound in move_notify() */
68	if (ttm->sg) {
69		node->sg    = ttm->sg;
70		node->pages = NULL;
71	} else {
72		node->sg    = NULL;
73		node->pages = nvbe->ttm.dma_address;
74	}
75	node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
76	return 0;
77}
78
79static int
80nv50_sgdma_unbind(struct ttm_tt *ttm)
81{
82	/* noop: unbound in move_notify() */
83	return 0;
84}
85
86static struct ttm_backend_func nv50_sgdma_backend = {
87	.bind			= nv50_sgdma_bind,
88	.unbind			= nv50_sgdma_unbind,
89	.destroy		= nouveau_sgdma_destroy
90};
91
92struct ttm_tt *
93nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
94			 unsigned long size, uint32_t page_flags,
95			 struct page *dummy_read_page)
96{
97	struct nouveau_drm *drm = nouveau_bdev(bdev);
98	struct nouveau_sgdma_be *nvbe;
99
100	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
101	if (!nvbe)
102		return NULL;
103
104	nvbe->dev = drm->dev;
105	if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
106		nvbe->ttm.ttm.func = &nv04_sgdma_backend;
107	else
108		nvbe->ttm.ttm.func = &nv50_sgdma_backend;
109
110	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
111		return NULL;
112	return &nvbe->ttm.ttm;
113}
114