drm/nouveau: fix m2mf copy to tiled gart

commit ce8f7699f2b6ffe4aa8368b8d9d370875accaa5f upstream.

Commit de7b7d59d54852c introduced tiled GART, but a linear copy is
still performed. This may result in errors on eviction, fix it by
checking tiling from memtype.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 25 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 7ff10711a4d0..5a5f021d5863 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -788,25 +788,25 @@ nv50_bo_move_m2mf(struct nouveau_channel *chan, struct ttm_buffer_object *bo,
                   struct ttm_mem_reg *old_mem, struct ttm_mem_reg *new_mem)
 {
         struct nouveau_mem *node = old_mem->mm_node;
-        struct nouveau_bo *nvbo = nouveau_bo(bo);
         u64 length = (new_mem->num_pages << PAGE_SHIFT);
         u64 src_offset = node->vma[0].offset;
         u64 dst_offset = node->vma[1].offset;
+        int src_tiled = !!node->memtype;
+        int dst_tiled = !!((struct nouveau_mem *)new_mem->mm_node)->memtype;
         int ret;
 
         while (length) {
                 u32 amount, stride, height;
 
+                ret = RING_SPACE(chan, 18 + 6 * (src_tiled + dst_tiled));
+                if (ret)
+                        return ret;
+
                 amount  = min(length, (u64)(4 * 1024 * 1024));
                 stride  = 16 * 4;
                 height  = amount / stride;
 
-                if (old_mem->mem_type == TTM_PL_VRAM &&
-                    nouveau_bo_tile_layout(nvbo)) {
-                        ret = RING_SPACE(chan, 8);
-                        if (ret)
-                                return ret;
-
+                if (src_tiled) {
                         BEGIN_NV04(chan, NvSubCopy, 0x0200, 7);
                         OUT_RING  (chan, 0);
                         OUT_RING  (chan, 0);
@@ -816,19 +816,10 @@ nv50_bo_move_m2mf(struct nouveau_channel *chan, struct ttm_buffer_object *bo,
                         OUT_RING  (chan, 0);
                         OUT_RING  (chan, 0);
                 } else {
-                        ret = RING_SPACE(chan, 2);
-                        if (ret)
-                                return ret;
-
                         BEGIN_NV04(chan, NvSubCopy, 0x0200, 1);
                         OUT_RING  (chan, 1);
                 }
-                if (new_mem->mem_type == TTM_PL_VRAM &&
-                    nouveau_bo_tile_layout(nvbo)) {
-                        ret = RING_SPACE(chan, 8);
-                        if (ret)
-                                return ret;
-
+                if (dst_tiled) {
                         BEGIN_NV04(chan, NvSubCopy, 0x021c, 7);
                         OUT_RING  (chan, 0);
                         OUT_RING  (chan, 0);
@@ -838,18 +829,10 @@ nv50_bo_move_m2mf(struct nouveau_channel *chan, struct ttm_buffer_object *bo,
                         OUT_RING  (chan, 0);
                         OUT_RING  (chan, 0);
                 } else {
-                        ret = RING_SPACE(chan, 2);
-                        if (ret)
-                                return ret;
-
                         BEGIN_NV04(chan, NvSubCopy, 0x021c, 1);
                         OUT_RING  (chan, 1);
                 }
 
-                ret = RING_SPACE(chan, 14);
-                if (ret)
-                        return ret;
-
                 BEGIN_NV04(chan, NvSubCopy, 0x0238, 2);
                 OUT_RING  (chan, upper_32_bits(src_offset));
                 OUT_RING  (chan, upper_32_bits(dst_offset));