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
 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		 * A failing ttm_dma_tt_init() will call ttm_tt_destroy()
102		 * and thus our nouveau_sgdma_destroy() hook, so we don't need
103		 * to free nvbe here.
104		 */
105		return NULL;
106	return &nvbe->ttm.ttm;
 
107}

 1// SPDX-License-Identifier: MIT
 2#include <linux/pagemap.h>
 3#include <linux/slab.h>
 4#include <drm/ttm/ttm_tt.h>
 5
 6#include "nouveau_drv.h"
 7#include "nouveau_mem.h"
 8#include "nouveau_ttm.h"
 9#include "nouveau_bo.h"
10
11struct nouveau_sgdma_be {
12	/* this has to be the first field so populate/unpopulated in
13	 * nouve_bo.c works properly, otherwise have to move them here
14	 */
15	struct ttm_tt ttm;
16	struct nouveau_mem *mem;
17};
18
19void
20nouveau_sgdma_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
21{
22	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
23
24	if (ttm) {
25		ttm_tt_fini(&nvbe->ttm);
26		kfree(nvbe);
27	}
28}
29
30int
31nouveau_sgdma_bind(struct ttm_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_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_drm *drm = nouveau_bdev(bo->bdev);
71	struct nouveau_bo *nvbo = nouveau_bo(bo);
72	struct nouveau_sgdma_be *nvbe;
73	enum ttm_caching caching;
74
75	if (nvbo->force_coherent)
76		caching = ttm_uncached;
77	else if (drm->agp.bridge)
78		caching = ttm_write_combined;
79	else
80		caching = ttm_cached;
81
82	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
83	if (!nvbe)
84		return NULL;
85
86	if (ttm_sg_tt_init(&nvbe->ttm, bo, page_flags, caching)) {
87		kfree(nvbe);
 
 
 
 
 
 
 
 
 
88		return NULL;
89	}
90	return &nvbe->ttm;
91}