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authorThomas Zimmermann <tzimmermann@suse.de>2020-11-03 10:30:10 +0100
committerThomas Zimmermann <tzimmermann@suse.de>2020-11-09 09:17:36 +0100
commit43676605f890b218e551f396a55dbaea7799acb4 (patch)
treeb3ce6592acfafea411d364ed64b7e98e8666d864 /drivers/gpu/drm/nouveau/nouveau_gem.h
parentf216fcb8e4d76038133926aec53df92bf6b15860 (diff)
drm/ttm: Add vmap/vunmap to TTM and TTM GEM helpers
The new functions ttm_bo_{vmap,vunmap}() map and unmap a TTM BO in kernel address space. The mapping's address is returned as struct dma_buf_map. Each function is a simplified version of TTM's existing kmap code. Both functions respect the memory's location ani/or writecombine flags. On top TTM's functions, GEM TTM helpers got drm_gem_ttm_{vmap,vunmap}(), two helpers that convert a GEM object into the TTM BO and forward the call to TTM's vmap/vunmap. These helpers can be dropped into the rsp GEM object callbacks. v5: * use size_t for storing mapping size (Christian) * ignore premapped memory areas correctly in ttm_bo_vunmap() * rebase onto latest TTM interfaces (Christian) * remove BUG() from ttm_bo_vmap() (Christian) v4: * drop ttm_kmap_obj_to_dma_buf() in favor of vmap helpers (Daniel, Christian) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Christian König <christian.koenig@amd.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Tested-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20201103093015.1063-6-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_gem.h')
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