From: Thomas Zimmermann <tzimmermann@suse.de>
To: maarten.lankhorst@linux.intel.com, mripard@kernel.org,
airlied@linux.ie, daniel@ffwll.ch, sean@poorly.run,
kraxel@redhat.com, emil.l.velikov@gmail.com, sam@ravnborg.org
Cc: Thomas Zimmermann <tzimmermann@suse.de>, dri-devel@lists.freedesktop.org
Subject: [PATCH 0/2] Default to cachable mappings for GEM SHMEM
Date: Wed, 13 May 2020 17:03:10 +0200 [thread overview]
Message-ID: <20200513150312.21421-1-tzimmermann@suse.de> (raw)
This patchset complements Daniel's recent patches for SHMEM. [1]
By default SHMEM maps pages using writecombine. Only virtio sets the
SHMEM implmentation to use cached mappings. Udl implements its own
vmap/mmap functions, which always maps pages with caching.
Unify the settings by switching the SHMEM code to use cached mappings
(i.e., PAGE_KERNEL actually). The exception is dma-buf imported pages,
which are still mapped using writecombine.
Tested with udl-driven hardware.
[1] https://lists.freedesktop.org/archives/dri-devel/2020-May/265468.html
Thomas Zimmermann (2):
drm/shmem: Use cached mappings by default
drm/udl: Use GEM vmap/mmap function from SHMEM helpers
drivers/gpu/drm/drm_gem_shmem_helper.c | 6 +-
drivers/gpu/drm/udl/Makefile | 2 +-
drivers/gpu/drm/udl/udl_drv.c | 3 -
drivers/gpu/drm/udl/udl_drv.h | 3 -
drivers/gpu/drm/udl/udl_gem.c | 106 ------------------------
drivers/gpu/drm/virtio/virtgpu_object.c | 1 -
include/drm/drm_gem_shmem_helper.h | 4 +-
7 files changed, 7 insertions(+), 118 deletions(-)
delete mode 100644 drivers/gpu/drm/udl/udl_gem.c
--
2.26.2
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next reply other threads:[~2020-05-13 15:04 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 15:03 Thomas Zimmermann [this message]
2020-05-13 15:03 ` [PATCH 1/2] drm/shmem: Use cached mappings by default Thomas Zimmermann
2020-05-13 15:06 ` Thomas Zimmermann
2020-05-14 12:40 ` Daniel Vetter
2020-05-14 15:27 ` Thomas Zimmermann
2020-05-14 20:36 ` Rob Herring
2020-05-15 6:58 ` Thomas Zimmermann
2020-05-15 14:10 ` Daniel Vetter
2020-05-18 8:13 ` Thomas Zimmermann
2020-05-18 8:23 ` Gerd Hoffmann
2020-05-18 8:50 ` Thomas Zimmermann
2020-05-18 10:11 ` Gerd Hoffmann
2020-05-18 14:40 ` Daniel Vetter
2020-05-19 6:31 ` Thomas Zimmermann
2020-05-13 15:03 ` [PATCH 2/2] drm/udl: Use GEM vmap/mmap function from SHMEM helpers Thomas Zimmermann
2020-05-13 15:49 ` Daniel Vetter
2020-05-13 17:19 ` Thomas Zimmermann
2020-05-14 12:44 ` Daniel Vetter
2020-05-19 6:36 ` Thomas Zimmermann
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