diff options
| author | Gabriel Krisman Bertazi <krisman@collabora.co.uk> | 2017-01-09 19:56:48 -0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-01-10 11:16:33 +0100 |
| commit | f0e36723a68dfd959168c73bfa7ca6fa426eadf5 (patch) | |
| tree | 629697fb5ae097cc9ab140a2c051a640d9fcc7dd /drivers/gpu/drm/drm_cache.c | |
| parent | 282d0a35c8c42c3ac4dd86a7e408ed1b30db4897 (diff) | |
drm: Document drm_cache interface
Notice that this uncovers an issue with the kernel-doc handling of array
arguments, causing the first parameter of drm_clflush_pages() to not
show up in the rst-generated page. A proposed fix is under review in
linux-doc: <http://www.spinics.net/lists/linux-doc/msg42544.html>
Changes since v1:
- Add section to drm-mm.rst.
- Fix kernel-doc style issues.
- s/memory/kernel memory/.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170109215649.6860-1-krisman@collabora.co.uk
Diffstat (limited to 'drivers/gpu/drm/drm_cache.c')
| -rw-r--r-- | drivers/gpu/drm/drm_cache.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index a7916e5f8864..5066638928ec 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -67,6 +67,14 @@ static void drm_cache_flush_clflush(struct page *pages[], } #endif +/** + * drm_clflush_pages - Flush dcache lines of a set of pages. + * @pages: List of pages to be flushed. + * @num_pages: Number of pages in the array. + * + * Flush every data cache line entry that points to an address belonging + * to a page in the array. + */ void drm_clflush_pages(struct page *pages[], unsigned long num_pages) { @@ -101,6 +109,13 @@ drm_clflush_pages(struct page *pages[], unsigned long num_pages) } EXPORT_SYMBOL(drm_clflush_pages); +/** + * drm_clflush_sg - Flush dcache lines pointing to a scather-gather. + * @st: struct sg_table. + * + * Flush every data cache line entry that points to an address in the + * sg. + */ void drm_clflush_sg(struct sg_table *st) { @@ -125,6 +140,14 @@ drm_clflush_sg(struct sg_table *st) } EXPORT_SYMBOL(drm_clflush_sg); +/** + * drm_clflush_virt_range - Flush dcache lines of a region + * @addr: Initial kernel memory address. + * @length: Region size. + * + * Flush every data cache line entry that points to an address in the + * region requested. + */ void drm_clflush_virt_range(void *addr, unsigned long length) { |