nouveau: add PRIME support
This adds prime->fd and fd->prime support to nouveau,
it passes the SG object to TTM, and then populates the
GART entries using it.
v2: add stubbed kmap + use new function to fill out pages array
for faulting + add reimport test.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 81599d6..4435e11 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -89,12 +89,17 @@
int
nouveau_bo_new(struct drm_device *dev, int size, int align,
uint32_t flags, uint32_t tile_mode, uint32_t tile_flags,
+ struct sg_table *sg,
struct nouveau_bo **pnvbo)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_bo *nvbo;
size_t acc_size;
int ret;
+ int type = ttm_bo_type_device;
+
+ if (sg)
+ type = ttm_bo_type_sg;
nvbo = kzalloc(sizeof(struct nouveau_bo), GFP_KERNEL);
if (!nvbo)
@@ -120,8 +125,8 @@
sizeof(struct nouveau_bo));
ret = ttm_bo_init(&dev_priv->ttm.bdev, &nvbo->bo, size,
- ttm_bo_type_device, &nvbo->placement,
- align >> PAGE_SHIFT, 0, false, NULL, acc_size, NULL,
+ type, &nvbo->placement,
+ align >> PAGE_SHIFT, 0, false, NULL, acc_size, sg,
nouveau_bo_del_ttm);
if (ret) {
/* ttm will call nouveau_bo_del_ttm if it fails.. */
@@ -817,9 +822,14 @@
} else
if (new_mem && new_mem->mem_type == TTM_PL_TT &&
nvbo->page_shift == vma->vm->spg_shift) {
- nouveau_vm_map_sg(vma, 0, new_mem->
- num_pages << PAGE_SHIFT,
- new_mem->mm_node);
+ if (((struct nouveau_mem *)new_mem->mm_node)->sg)
+ nouveau_vm_map_sg_table(vma, 0, new_mem->
+ num_pages << PAGE_SHIFT,
+ new_mem->mm_node);
+ else
+ nouveau_vm_map_sg(vma, 0, new_mem->
+ num_pages << PAGE_SHIFT,
+ new_mem->mm_node);
} else {
nouveau_vm_unmap(vma);
}
@@ -1058,10 +1068,19 @@
struct drm_device *dev;
unsigned i;
int r;
+ bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
if (ttm->state != tt_unpopulated)
return 0;
+ if (slave && ttm->sg) {
+ /* make userspace faulting work */
+ drm_prime_sg_to_page_addr_arrays(ttm->sg, ttm->pages,
+ ttm_dma->dma_address, ttm->num_pages);
+ ttm->state = tt_unbound;
+ return 0;
+ }
+
dev_priv = nouveau_bdev(ttm->bdev);
dev = dev_priv->dev;
@@ -1106,6 +1125,10 @@
struct drm_nouveau_private *dev_priv;
struct drm_device *dev;
unsigned i;
+ bool slave = !!(ttm->page_flags & TTM_PAGE_FLAG_SG);
+
+ if (slave)
+ return;
dev_priv = nouveau_bdev(ttm->bdev);
dev = dev_priv->dev;
@@ -1181,9 +1204,12 @@
if (nvbo->bo.mem.mem_type == TTM_PL_VRAM)
nouveau_vm_map(vma, nvbo->bo.mem.mm_node);
- else
- if (nvbo->bo.mem.mem_type == TTM_PL_TT)
- nouveau_vm_map_sg(vma, 0, size, node);
+ else if (nvbo->bo.mem.mem_type == TTM_PL_TT) {
+ if (node->sg)
+ nouveau_vm_map_sg_table(vma, 0, size, node);
+ else
+ nouveau_vm_map_sg(vma, 0, size, node);
+ }
list_add_tail(&vma->head, &nvbo->vma_list);
vma->refcount = 1;