1// SPDX-License-Identifier: MIT
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	/* this has to be the first field so populate/unpopulated in
11	 * nouve_bo.c works properly, otherwise have to move them here
12	 */
13	struct ttm_dma_tt ttm;
14	struct nouveau_mem *mem;
15};
16
17void
18nouveau_sgdma_destroy(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
19{
20	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
21
22	if (ttm) {
23		nouveau_sgdma_unbind(bdev, ttm);
24		ttm_tt_destroy_common(bdev, ttm);
25		ttm_dma_tt_fini(&nvbe->ttm);
26		kfree(nvbe);
27	}
28}
29
30int
31nouveau_sgdma_bind(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct ttm_resource *reg)
32{
33	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
34	struct nouveau_drm *drm = nouveau_bdev(bdev);
35	struct nouveau_mem *mem = nouveau_mem(reg);
36	int ret;
37
38	if (nvbe->mem)
39		return 0;
40
41	ret = nouveau_mem_host(reg, &nvbe->ttm);
42	if (ret)
43		return ret;
44
45	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
46		ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
47		if (ret) {
48			nouveau_mem_fini(mem);
49			return ret;
50		}
51	}
52
53	nvbe->mem = mem;
54	return 0;
55}
56
57void
58nouveau_sgdma_unbind(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
59{
60	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
61	if (nvbe->mem) {
62		nouveau_mem_fini(nvbe->mem);
63		nvbe->mem = NULL;
64	}
65}
66
67struct ttm_tt *
68nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags)
69{
70	struct nouveau_sgdma_be *nvbe;
71
72	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
73	if (!nvbe)
74		return NULL;
75
76	if (ttm_dma_tt_init(&nvbe->ttm, bo, page_flags)) {
77		kfree(nvbe);
78		return NULL;
79	}
80	return &nvbe->ttm.ttm;
81}
82