Thomas any comments on this?
Is the purpose of this now clear enough?
Thanks, Christian.
Am 01.06.21 um 14:25 schrieb Christian König:
From: Lang Yu Lang.Yu@amd.com
Sometimes drivers need to use bounce buffers to evict BOs. While those reside in some domain they are not necessarily suitable for CS.
Add a flag so that drivers can note that a bounce buffers needs to be reallocated during validation.
v2: add detailed comments v3 (chk): merge commits and rework commit message
Suggested-by: Christian König christian.koenig@amd.com Signed-off-by: Lang Yu Lang.Yu@amd.com Signed-off-by: Christian König christian.koenig@amd.com
drivers/gpu/drm/ttm/ttm_bo.c | 3 +++ include/drm/ttm/ttm_placement.h | 7 +++++-- 2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 51a94fd63bd7..6b393502198e 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -929,6 +929,9 @@ static bool ttm_bo_places_compat(const struct ttm_place *places, { unsigned i;
- if (mem->placement & TTM_PL_FLAG_TEMPORARY)
return false;- for (i = 0; i < num_placement; i++) { const struct ttm_place *heap = &places[i];
diff --git a/include/drm/ttm/ttm_placement.h b/include/drm/ttm/ttm_placement.h index aa6ba4d0cf78..8995c9e4ec1b 100644 --- a/include/drm/ttm/ttm_placement.h +++ b/include/drm/ttm/ttm_placement.h @@ -47,8 +47,11 @@
- top of the memory area, instead of the bottom.
*/
-#define TTM_PL_FLAG_CONTIGUOUS (1 << 19) -#define TTM_PL_FLAG_TOPDOWN (1 << 22) +#define TTM_PL_FLAG_CONTIGUOUS (1 << 0) +#define TTM_PL_FLAG_TOPDOWN (1 << 1)
+/* For multihop handling */ +#define TTM_PL_FLAG_TEMPORARY (1 << 2)
/**
- struct ttm_place