Serge Semin 8a08e50cee drm: Permit video-buffers writecombine mapping for MIPS ... Since commit 4b050ba7a6 ("MIPS: pgtable.h: Implement the pgprot_writecombine function for MIPS") and commit c4687b15a8 ("MIPS: Fix definition of pgprot_writecombine()") write-combine vma mapping is available to be used by kernel subsystems for MIPS. In particular the uncached accelerated attribute is requested to be set by ioremap_wc() method and by generic PCI memory pages/ranges mapping methods. The same is done by the drm_io_prot()/ttm_io_prot() functions in case if write-combine flag is set for vma's passed for mapping. But for some reason the pgprot_writecombine() method calling is ifdefed to be a platform-specific with MIPS system being marked as lacking of one. At the very least it doesn't reflect the current MIPS platform implementation. So in order to improve the DRM subsystem performance on MIPS with UCA mapping enabled, we need to have pgprot_writecombine() called for buffers, which need store operations being combined. In case if particular MIPS chip doesn't support the UCA attribute, the mapping will fall back to noncached. Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: James Hogan <jhogan@kernel.org> Acked-by: Christian König <christian.koenig@amd.com> Reviewed-by: Paul Burton <paul.burton@mips.com> Signed-off-by: Vadim V. Vlasov <vadim.vlasov@t-platforms.ru> Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190423123122.32573-1-fancer.lancer@gmail.com		2019-06-18 15:41:33 -04:00
..
Makefile	drm/ttm, drm/vmwgfx: Move the lock- and object functionality to the vmwgfx driver	2018-09-27 15:19:20 +02:00
ttm_agp_backend.c	Add SPDX idenitifier and clarify license	2018-05-15 13:44:27 -05:00
ttm_bo.c	drm/ttm: fix busy memory to fail other user v10	2019-05-31 10:39:34 -05:00
ttm_bo_manager.c	Add SPDX idenitifier and clarify license	2018-05-15 13:44:27 -05:00
ttm_bo_util.c	drm: Permit video-buffers writecombine mapping for MIPS	2019-06-18 15:41:33 -04:00
ttm_bo_vm.c	drm: Use the same mmap-range offset and size for GEM and TTM	2019-03-19 15:03:53 -05:00
ttm_execbuf_util.c	drm/ttm: Make LRU removal optional v2	2019-05-31 10:39:34 -05:00
ttm_memory.c	drm pull request for 5.2	2019-05-08 21:35:19 -07:00
ttm_module.c	Add SPDX idenitifier and clarify license	2018-05-15 13:44:27 -05:00
ttm_page_alloc.c	drm/ttm: fix incrementing the page pointer for huge pages	2019-04-11 10:01:51 -05:00
ttm_page_alloc_dma.c	drm/ttm: remove dead codes	2018-08-27 11:11:02 -05:00
ttm_tt.c	drm/ttm: clean up non-x86 definitions on ttm_tt	2018-08-01 17:23:56 -05:00