diff options
| author | Thomas Hellstrom <thellstrom@vmware.com> | 2013-10-28 02:02:19 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-07 16:02:13 -0700 |
| commit | 63034aee5f85e6c4decdaa600ed1febfa90a348f (patch) | |
| tree | bd36354149e12ac5a02749474c2d093e76629362 | |
| parent | 465282b316e98ed17698900af70fa8260c9c9e70 (diff) | |
drm/ttm: Fix memory type compatibility check
commit 59c8e66378fb78adbcd05f0d09783dde6fef282b upstream.
Also check the busy placements before deciding to move a buffer object.
Failing to do this may result in a completely unneccessary move within a
single memory type.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Weng Meiling <wengmeiling.weng@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index ceb70dde21a..a67e61be38f 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -1091,24 +1091,32 @@ out_unlock: return ret; } -static int ttm_bo_mem_compat(struct ttm_placement *placement, - struct ttm_mem_reg *mem) +static bool ttm_bo_mem_compat(struct ttm_placement *placement, + struct ttm_mem_reg *mem, + uint32_t *new_flags) { int i; if (mem->mm_node && placement->lpfn != 0 && (mem->start < placement->fpfn || mem->start + mem->num_pages > placement->lpfn)) - return -1; + return false; for (i = 0; i < placement->num_placement; i++) { - if ((placement->placement[i] & mem->placement & - TTM_PL_MASK_CACHING) && - (placement->placement[i] & mem->placement & - TTM_PL_MASK_MEM)) - return i; + *new_flags = placement->placement[i]; + if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) && + (*new_flags & mem->placement & TTM_PL_MASK_MEM)) + return true; + } + + for (i = 0; i < placement->num_busy_placement; i++) { + *new_flags = placement->busy_placement[i]; + if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) && + (*new_flags & mem->placement & TTM_PL_MASK_MEM)) + return true; } - return -1; + + return false; } int ttm_bo_validate(struct ttm_buffer_object *bo, @@ -1117,6 +1125,7 @@ int ttm_bo_validate(struct ttm_buffer_object *bo, bool no_wait_gpu) { int ret; + uint32_t new_flags; BUG_ON(!atomic_read(&bo->reserved)); /* Check that range is valid */ @@ -1127,8 +1136,7 @@ int ttm_bo_validate(struct ttm_buffer_object *bo, /* * Check whether we need to move buffer. */ - ret = ttm_bo_mem_compat(placement, &bo->mem); - if (ret < 0) { + if (!ttm_bo_mem_compat(placement, &bo->mem, &new_flags)) { ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu); if (ret) return ret; @@ -1137,7 +1145,7 @@ int ttm_bo_validate(struct ttm_buffer_object *bo, * Use the access and other non-mapping-related flag bits from * the compatible memory placement flags to the active flags */ - ttm_flag_masked(&bo->mem.placement, placement->placement[ret], + ttm_flag_masked(&bo->mem.placement, new_flags, ~TTM_PL_MASK_MEMTYPE); } /* |