1 #include <linux/pagemap.h>
2 #include <linux/slab.h>
4 #include "nouveau_drv.h"
5 #include "nouveau_ttm.h"
7 struct 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
11 struct ttm_dma_tt ttm;
12 struct nvkm_mem *node;
16 nouveau_sgdma_destroy(struct ttm_tt *ttm)
18 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
21 ttm_dma_tt_fini(&nvbe->ttm);
27 nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
29 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
30 struct nvkm_mem *node = reg->mm_node;
37 node->pages = nvbe->ttm.dma_address;
39 node->size = (reg->num_pages << PAGE_SHIFT) >> 12;
41 nvkm_vm_map(&node->vma[0], node);
47 nv04_sgdma_unbind(struct ttm_tt *ttm)
49 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
50 nvkm_vm_unmap(&nvbe->node->vma[0]);
54 static struct ttm_backend_func nv04_sgdma_backend = {
55 .bind = nv04_sgdma_bind,
56 .unbind = nv04_sgdma_unbind,
57 .destroy = nouveau_sgdma_destroy
61 nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
63 struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
64 struct nvkm_mem *node = reg->mm_node;
66 /* noop: bound in move_notify() */
72 node->pages = nvbe->ttm.dma_address;
74 node->size = (reg->num_pages << PAGE_SHIFT) >> 12;
79 nv50_sgdma_unbind(struct ttm_tt *ttm)
81 /* noop: unbound in move_notify() */
85 static struct ttm_backend_func nv50_sgdma_backend = {
86 .bind = nv50_sgdma_bind,
87 .unbind = nv50_sgdma_unbind,
88 .destroy = nouveau_sgdma_destroy
92 nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
93 unsigned long size, uint32_t page_flags,
94 struct page *dummy_read_page)
96 struct nouveau_drm *drm = nouveau_bdev(bdev);
97 struct nouveau_sgdma_be *nvbe;
99 nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
103 if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
104 nvbe->ttm.ttm.func = &nv04_sgdma_backend;
106 nvbe->ttm.ttm.func = &nv50_sgdma_backend;
108 if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
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
115 return &nvbe->ttm.ttm;