From: Lang Yu Date: Tue, 22 Jun 2021 16:23:34 +0000 (-0400) Subject: drm/ttm: add TTM_PL_FLAG_TEMPORARY flag v3 X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ae1bef72c20f9231898e2f5595751a2635d49db8;p=linux.git drm/ttm: add TTM_PL_FLAG_TEMPORARY flag v3 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 Signed-off-by: Lang Yu Signed-off-by: Christian König Signed-off-by: Andrey Grodzovsky Acked-by: Nirmoy Das Link: https://patchwork.freedesktop.org/patch/msgid/20210622162339.761651-1-andrey.grodzovsky@amd.com --- diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 6c78149360c42..5a2dc712c632d 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -918,6 +918,9 @@ 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 aa6ba4d0cf784..8995c9e4ec1b2 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