drm/ttm/ttm_tt.h

3  * Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA
19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
44  * struct ttm_tt - This is a structure holding the pages, caching- and aperture
57 	 * and swapped out by TTM.  Calling ttm_tt_populate() will then swap the
65 	 * externally, like with dma-buf or userptr. This effectively disables
85 	 * not encrypted. The framework will try to match what the dma layer
93 	 * TTM_TT_FLAG_PRIV_POPULATED: TTM internal only. DO NOT USE. This is
109 	/** @sg: for SG objects via dma-buf. */
132  * struct ttm_kmap_iter_tt - Specialization of a mappig iterator for a tt.
145 	return tt->page_flags & TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_is_populated()
149  * ttm_tt_is_swapped() - Whether the ttm_tt is swapped out or backed up
152  * Return: true if swapped or backed up, false otherwise.
156 	return tt->page_flags & (TTM_TT_FLAG_SWAPPED | TTM_TT_FLAG_BACKED_UP);  in ttm_tt_is_swapped()
160  * ttm_tt_is_backed_up() - Whether the ttm_tt backed up
163  * Return: true if swapped or backed up, false otherwise.
167 	return tt->page_flags & TTM_TT_FLAG_BACKED_UP;  in ttm_tt_is_backed_up()
171  * ttm_tt_clear_backed_up() - Clear the ttm_tt backed-up status
174  * Drivers can use this functionto clear the backed-up status,
175  * for example before destroying or re-validating a purged tt.
179 	tt->page_flags &= ~TTM_TT_FLAG_BACKED_UP;  in ttm_tt_clear_backed_up()
244  * ttm_tt_populate - allocate pages for a ttm
256  * ttm_tt_unpopulate - free pages from a ttm
266  * ttm_tt_mark_for_clear - Mark pages for clearing on populate.
275 	ttm->page_flags |= TTM_TT_FLAG_ZERO_ALLOC;  in ttm_tt_mark_for_clear()
285  * struct ttm_backup_flags - Flags to govern backup behaviour.