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 nvkm_mem *node;
 13};
 14
 15static void
 16nouveau_sgdma_destroy(struct ttm_tt *ttm)
 17{
 18	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 19
 20	if (ttm) {
 21		ttm_dma_tt_fini(&nvbe->ttm);
 
 
 22		kfree(nvbe);
 23	}
 24}
 25
 26static int
 27nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 28{
 29	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 30	struct nvkm_mem *node = mem->mm_node;
 
 
 31
 32	if (ttm->sg) {
 33		node->sg    = ttm->sg;
 34		node->pages = NULL;
 35	} else {
 36		node->sg    = NULL;
 37		node->pages = nvbe->ttm.dma_address;
 38	}
 39	node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
 40
 41	nvkm_vm_map(&node->vma[0], node);
 42	nvbe->node = node;
 43	return 0;
 44}
 
 
 
 
 
 
 
 45
 46static int
 47nv04_sgdma_unbind(struct ttm_tt *ttm)
 48{
 49	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 50	nvkm_vm_unmap(&nvbe->node->vma[0]);
 51	return 0;
 52}
 53
 54static struct ttm_backend_func nv04_sgdma_backend = {
 55	.bind			= nv04_sgdma_bind,
 56	.unbind			= nv04_sgdma_unbind,
 57	.destroy		= nouveau_sgdma_destroy
 58};
 59
 60static int
 61nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 62{
 63	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 64	struct nvkm_mem *node = mem->mm_node;
 65
 66	/* noop: bound in move_notify() */
 67	if (ttm->sg) {
 68		node->sg    = ttm->sg;
 69		node->pages = NULL;
 70	} else {
 71		node->sg    = NULL;
 72		node->pages = nvbe->ttm.dma_address;
 73	}
 74	node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
 75	return 0;
 76}
 77
 78static int
 79nv50_sgdma_unbind(struct ttm_tt *ttm)
 80{
 81	/* noop: unbound in move_notify() */
 82	return 0;
 83}
 84
 85static struct ttm_backend_func nv50_sgdma_backend = {
 86	.bind			= nv50_sgdma_bind,
 87	.unbind			= nv50_sgdma_unbind,
 88	.destroy		= nouveau_sgdma_destroy
 89};
 90
 91struct ttm_tt *
 92nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
 93			 unsigned long size, uint32_t page_flags,
 94			 struct page *dummy_read_page)
 95{
 96	struct nouveau_drm *drm = nouveau_bdev(bdev);
 
 97	struct nouveau_sgdma_be *nvbe;
 
 
 
 
 
 
 
 
 98
 99	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
100	if (!nvbe)
101		return NULL;
102
103	if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
104		nvbe->ttm.ttm.func = &nv04_sgdma_backend;
105	else
106		nvbe->ttm.ttm.func = &nv50_sgdma_backend;
107
108	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
109		/*
110		 * A failing ttm_dma_tt_init() will call ttm_tt_destroy()
111		 * and thus our nouveau_sgdma_destroy() hook, so we don't need
112		 * to free nvbe here.
113		 */
114		return NULL;
115	return &nvbe->ttm.ttm;
 
116}

 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#include "nouveau_bo.h"
 9
10struct nouveau_sgdma_be {
11	/* this has to be the first field so populate/unpopulated in
12	 * nouve_bo.c works properly, otherwise have to move them here
13	 */
14	struct ttm_tt ttm;
15	struct nouveau_mem *mem;
16};
17
18void
19nouveau_sgdma_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
20{
21	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
22
23	if (ttm) {
24		nouveau_sgdma_unbind(bdev, ttm);
25		ttm_tt_destroy_common(bdev, ttm);
26		ttm_tt_fini(&nvbe->ttm);
27		kfree(nvbe);
28	}
29}
30
31int
32nouveau_sgdma_bind(struct ttm_device *bdev, struct ttm_tt *ttm, struct ttm_resource *reg)
33{
34	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
35	struct nouveau_drm *drm = nouveau_bdev(bdev);
36	struct nouveau_mem *mem = nouveau_mem(reg);
37	int ret;
38
39	if (nvbe->mem)
40		return 0;
 
 
 
 
 
 
41
42	ret = nouveau_mem_host(reg, &nvbe->ttm);
43	if (ret)
44		return ret;
45
46	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
47		ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
48		if (ret) {
49			nouveau_mem_fini(mem);
50			return ret;
51		}
52	}
53
54	nvbe->mem = mem;
 
 
 
 
55	return 0;
56}
57
58void
59nouveau_sgdma_unbind(struct ttm_device *bdev, struct ttm_tt *ttm)
 
 
 
 
 
 
60{
61	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
62	if (nvbe->mem) {
63		nouveau_mem_fini(nvbe->mem);
64		nvbe->mem = NULL;
 
 
 
 
 
 
65	}
 
 
 
 
 
 
 
 
 
66}
67
 
 
 
 
 
 
68struct ttm_tt *
69nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags)
 
 
70{
71	struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
72	struct nouveau_bo *nvbo = nouveau_bo(bo);
73	struct nouveau_sgdma_be *nvbe;
74	enum ttm_caching caching;
75
76	if (nvbo->force_coherent)
77		caching = ttm_uncached;
78	else if (drm->agp.bridge)
79		caching = ttm_write_combined;
80	else
81		caching = ttm_cached;
82
83	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
84	if (!nvbe)
85		return NULL;
86
87	if (ttm_sg_tt_init(&nvbe->ttm, bo, page_flags, caching)) {
88		kfree(nvbe);
 
 
 
 
 
 
 
 
 
89		return NULL;
90	}
91	return &nvbe->ttm;
92}