mirror of https://gitee.com/openkylin/linux.git
ttm: Fix caching mode selection.
A bug caused a new caching state to be selected on each buffer object validation regardless of the current caching state. Moreover, a caching state could be selected that wasn't supported by the memory type. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
parent
d1724078d6
commit
ae3e8122cb
|
@ -655,31 +655,52 @@ static int ttm_bo_mem_force_space(struct ttm_bo_device *bdev,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
|
||||
uint32_t cur_placement,
|
||||
uint32_t proposed_placement)
|
||||
{
|
||||
uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING;
|
||||
uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING;
|
||||
|
||||
/**
|
||||
* Keep current caching if possible.
|
||||
*/
|
||||
|
||||
if ((cur_placement & caching) != 0)
|
||||
result |= (cur_placement & caching);
|
||||
else if ((man->default_caching & caching) != 0)
|
||||
result |= man->default_caching;
|
||||
else if ((TTM_PL_FLAG_CACHED & caching) != 0)
|
||||
result |= TTM_PL_FLAG_CACHED;
|
||||
else if ((TTM_PL_FLAG_WC & caching) != 0)
|
||||
result |= TTM_PL_FLAG_WC;
|
||||
else if ((TTM_PL_FLAG_UNCACHED & caching) != 0)
|
||||
result |= TTM_PL_FLAG_UNCACHED;
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
|
||||
bool disallow_fixed,
|
||||
uint32_t mem_type,
|
||||
uint32_t mask, uint32_t *res_mask)
|
||||
uint32_t proposed_placement,
|
||||
uint32_t *masked_placement)
|
||||
{
|
||||
uint32_t cur_flags = ttm_bo_type_flags(mem_type);
|
||||
|
||||
if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed)
|
||||
return false;
|
||||
|
||||
if ((cur_flags & mask & TTM_PL_MASK_MEM) == 0)
|
||||
if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0)
|
||||
return false;
|
||||
|
||||
if ((mask & man->available_caching) == 0)
|
||||
if ((proposed_placement & man->available_caching) == 0)
|
||||
return false;
|
||||
if (mask & man->default_caching)
|
||||
cur_flags |= man->default_caching;
|
||||
else if (mask & TTM_PL_FLAG_CACHED)
|
||||
cur_flags |= TTM_PL_FLAG_CACHED;
|
||||
else if (mask & TTM_PL_FLAG_WC)
|
||||
cur_flags |= TTM_PL_FLAG_WC;
|
||||
else
|
||||
cur_flags |= TTM_PL_FLAG_UNCACHED;
|
||||
|
||||
*res_mask = cur_flags;
|
||||
cur_flags |= (proposed_placement & man->available_caching);
|
||||
|
||||
*masked_placement = cur_flags;
|
||||
return true;
|
||||
}
|
||||
|
||||
|
@ -723,6 +744,9 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
|
|||
if (!type_ok)
|
||||
continue;
|
||||
|
||||
cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
|
||||
cur_flags);
|
||||
|
||||
if (mem_type == TTM_PL_SYSTEM)
|
||||
break;
|
||||
|
||||
|
@ -779,6 +803,9 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
|
|||
proposed_placement, &cur_flags))
|
||||
continue;
|
||||
|
||||
cur_flags = ttm_bo_select_caching(man, bo->mem.placement,
|
||||
cur_flags);
|
||||
|
||||
ret = ttm_bo_mem_force_space(bdev, mem, mem_type,
|
||||
interruptible, no_wait);
|
||||
|
||||
|
|
Loading…
Reference in New Issue