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| author | Dave Airlie <airlied@redhat.com> | 2020-10-29 06:58:52 +0300 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2020-11-11 04:11:03 +0300 |
| commit | ebdf565169af006ee3be8c40eecbfc77d28a3b84 (patch) | |
| tree | ccc29cae7148ec2940d137a6492852dc1d6f1ff9 /drivers/gpu/drm/qxl/qxl_ttm.c | |
| parent | 2dcab875e7637f1d3f9b978566e61ed1cbbba054 (diff) | |
| download | linux-ebdf565169af006ee3be8c40eecbfc77d28a3b84.tar.xz | |
drm/ttm: add multihop infrastrucutre (v3)
Currently drivers get called to move a buffer, but if they have to
move it temporarily through another space (SYSTEM->VRAM via TT)
then they can end up with a lot of ttm->driver->ttm call stacks,
if the temprorary space moves requires eviction.
Instead of letting the driver do all the placement/space for the
temporary, allow it to report back (-EMULTIHOP) and a placement (hop)
to the move code, which will then do the temporary move, and the
correct placement move afterwards.
This removes a lot of code from drivers, at the expense of
adding some midlayering. I've some further ideas on how to turn
it inside out, but I think this is a good solution to the call
stack problems.
v2: separate out the driver patches, add WARN for getting
MULTHOP in paths we shouldn't (Daniel)
v3: use memset (Christian)
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: hristian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201109005432.861936-2-airlied@gmail.com
Diffstat (limited to 'drivers/gpu/drm/qxl/qxl_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/qxl/qxl_ttm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c index a80d59634143..128c38c8a837 100644 --- a/drivers/gpu/drm/qxl/qxl_ttm.c +++ b/drivers/gpu/drm/qxl/qxl_ttm.c @@ -140,7 +140,8 @@ static void qxl_bo_move_notify(struct ttm_buffer_object *bo, static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict, struct ttm_operation_ctx *ctx, - struct ttm_resource *new_mem) + struct ttm_resource *new_mem, + struct ttm_place *hop) { struct ttm_resource *old_mem = &bo->mem; int ret; |