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author | Matthew Auld <matthew.auld@intel.com> | 2023-06-15 20:20:52 +0300 |
---|---|---|
committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2023-12-21 19:34:53 +0300 |
commit | 8489f30e0c8e47d2d654cfb31825ff37de7e5574 (patch) | |
tree | 04414b6d610da8a075ca4a323ea315495b8dbb07 /drivers/gpu/drm/xe/xe_bo.c | |
parent | 7ba4c5f02763cc423bfa0c6a87a8dd5501dc3417 (diff) | |
download | linux-8489f30e0c8e47d2d654cfb31825ff37de7e5574.tar.xz |
drm/xe/bo: handle PL_TT -> PL_TT
When moving between PL_VRAM <-> PL_SYSTEM we have to have use PL_TT in
the middle as a temporary resource for the actual copy. In some GL
workloads it can be seen that once the resource has been moved to the
PL_TT we might have to bail out of the ttm_bo_validate(), before
finishing the final hop. If this happens the resource is left as
TTM_PL_FLAG_TEMPORARY, and when the ttm_bo_validate() is restarted the
current placement is always seen as incompatible, requiring us to
complete the move. However if the BO allows PL_TT as a possible
placement we can end up attempting a PL_TT -> PL_TT move (like when
running out of VRAM) which leads to explosions in xe_bo_move(), like
triggering the XE_BUG_ON(!tile).
Going from TTM_PL_FLAG_TEMPORARY with PL_TT -> PL_VRAM should already
work as-is, so it looks like we only need to worry about PL_TT -> PL_TT
and it looks like we can just treat it as a dummy move, since no real
move is needed.
Reported-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/xe/xe_bo.c')
-rw-r--r-- | drivers/gpu/drm/xe/xe_bo.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c index 43801994f069..ad0ea3014bfe 100644 --- a/drivers/gpu/drm/xe/xe_bo.c +++ b/drivers/gpu/drm/xe/xe_bo.c @@ -603,6 +603,16 @@ static int xe_bo_move(struct ttm_buffer_object *ttm_bo, bool evict, goto out; } + /* + * Failed multi-hop where the old_mem is still marked as + * TTM_PL_FLAG_TEMPORARY, should just be a dummy move. + */ + if (old_mem->mem_type == XE_PL_TT && + new_mem->mem_type == XE_PL_TT) { + ttm_bo_move_null(ttm_bo, new_mem); + goto out; + } + if (!move_lacks_source && !xe_bo_is_pinned(bo)) { ret = xe_bo_move_notify(bo, ctx); if (ret) |