From: Rob Herring <robh@kernel•org>
To: dri-devel@lists•freedesktop.org
Cc: "Heiko Stübner" <heiko@sntech•de>,
"Neil Armstrong" <narmstrong@baylibre•com>,
"David Airlie" <airlied@linux•ie>,
"Liviu Dudau" <liviu.dudau@arm•com>,
"Sandy Huang" <hjc@rock-chips•com>,
"Laurent Pinchart" <laurent.pinchart@ideasonboard•com>,
"Benjamin Gaignard" <benjamin.gaignard@linaro•org>,
"Yannick Fertre" <yannick.fertre@st•com>,
"Kevin Hilman" <khilman@baylibre•com>,
"Xinwei Kong" <kong.kongxinwei@hisilicon•com>,
"Xinliang Liu" <z.liuxinliang@hisilicon•com>,
linux-rockchip@lists•infradead.org,
"Chen-Yu Tsai" <wens@csie•org>,
"Noralf Trønnes" <noralf@tronnes•org>,
"James (Qian) Wang" <james.qian.wang@arm•com>,
"CK Hu" <ck.hu@mediatek•com>,
"Philipp Zabel" <p.zabel@pengutronix•de>,
"Alexandre Torgue" <alexandre.torgue@st•com>,
"Chen Feng" <puck.chen@hisilicon•com>,
"Maarten Lankhorst" <maarten.lankhorst@linux•intel.com>,
"Maxime Ripard" <mripard@kernel•org>,
linux-mediatek@lists•infradead.org,
"Matthias Brugger" <matthias.bgg@gmail•com>,
"Daniel Vetter" <daniel@ffwll•ch>, "Sean Paul" <sean@poorly•run>,
linux-arm-kernel@lists•infradead.org,
"Philippe Cornu" <philippe.cornu@st•com>,
"Vincent Abriou" <vincent.abriou@st•com>,
"Kieran Bingham" <kieran.bingham+renesas@ideasonboard•com>,
"Maxime Coquelin" <mcoquelin.stm32@gmail•com>,
"Rongrong Zou" <zourongrong@gmail•com>
Subject: [PATCH 0/6] drm: Support CMA per allocation kernel mappings
Date: Mon, 21 Oct 2019 16:45:44 -0500 [thread overview]
Message-ID: <20191021214550.1461-1-robh@kernel.org> (raw)
This series adds support for CMA/DMA users to skip kernel mappings for
GEM allocations. The DMA API only guarantees a kernel mapping at
allocation time. Creating mappings with vmap() after allocation may or
may not work as not all allocations have a struct page. As virtual
memory space is limited on 32-bit systems some drivers will skip kernel
mappings when possible. This prevents those drivers from using CMA
helpers and the generic fbdev emulation which results in a lot of
duplicated code.
In order to distinguish between kernel and userspace allocations,
a new flag, DRM_MODE_DUMB_KERNEL_MAP, for drm_mode_create_dumb() is
introduced. This allows drivers to override the default behavior for
CMA helpers of always creating a kernel mapping.
Mediatek is converted to CMA helpers and Rockchip is converted to generic
fbdev support. I also have patches to convert Rockchip to CMA and shmem
helpers, but they need a bit more work. Exynos can also probably be
converted to use CMA helpers.
Compile tested only. I did test fbdev on Rockchip, but the h/w I have
has an IOMMU, so the CMA code path doesn't get tested.
Rob
Rob Herring (6):
drm/kirin: Use DRM_GEM_CMA_VMAP_DRIVER_OPS
drm: Introduce DRM_MODE_DUMB_KERNEL_MAP flag
drm/cma-helper: Use the dma_*_attr API variant
drm/cma-helper: Support DRM_MODE_DUMB_KERNEL_MAP flag
drm/mediatek: Convert to use CMA helpers
drm/rockchip: Convert to use generic fbdev emulation
.../gpu/drm/arm/display/komeda/komeda_kms.c | 1 +
drivers/gpu/drm/arm/malidp_drv.c | 1 +
drivers/gpu/drm/drm_client.c | 1 +
drivers/gpu/drm/drm_dumb_buffers.c | 5 +-
drivers/gpu/drm/drm_gem_cma_helper.c | 68 +++--
.../gpu/drm/hisilicon/kirin/kirin_drm_ade.c | 11 +-
drivers/gpu/drm/mediatek/Makefile | 1 -
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 2 +-
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 28 +-
drivers/gpu/drm/mediatek/mtk_drm_fb.c | 1 -
drivers/gpu/drm/mediatek/mtk_drm_gem.c | 289 ------------------
drivers/gpu/drm/mediatek/mtk_drm_gem.h | 51 ----
drivers/gpu/drm/mediatek/mtk_drm_plane.c | 7 +-
drivers/gpu/drm/meson/meson_drv.c | 1 +
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 1 +
drivers/gpu/drm/rockchip/Makefile | 1 -
drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 10 +-
drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 2 -
drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 14 -
drivers/gpu/drm/rockchip/rockchip_drm_fb.h | 6 -
drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c | 170 -----------
drivers/gpu/drm/rockchip/rockchip_drm_fbdev.h | 24 --
drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 6 +-
drivers/gpu/drm/rockchip/rockchip_drm_gem.h | 4 -
drivers/gpu/drm/stm/drv.c | 1 +
drivers/gpu/drm/sun4i/sun4i_drv.c | 1 +
include/drm/drm_gem_cma_helper.h | 1 +
include/uapi/drm/drm_mode.h | 2 +
28 files changed, 78 insertions(+), 632 deletions(-)
delete mode 100644 drivers/gpu/drm/mediatek/mtk_drm_gem.c
delete mode 100644 drivers/gpu/drm/mediatek/mtk_drm_gem.h
delete mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c
delete mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_fbdev.h
--
2.20.1
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next reply other threads:[~2019-10-21 21:46 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-21 21:45 Rob Herring [this message]
2019-10-21 21:45 ` [PATCH 1/6] drm/kirin: Use DRM_GEM_CMA_VMAP_DRIVER_OPS Rob Herring
2019-10-21 21:45 ` [PATCH 2/6] drm: Introduce DRM_MODE_DUMB_KERNEL_MAP flag Rob Herring
2019-10-22 11:14 ` Laurent Pinchart
2019-10-22 12:42 ` Rob Herring
2019-10-23 14:28 ` Laurent Pinchart
2019-10-23 17:03 ` Rob Herring
2019-10-21 21:45 ` [PATCH 3/6] drm/cma-helper: Use the dma_*_attr API variant Rob Herring
2019-10-22 1:01 ` kbuild test robot
2019-10-22 11:18 ` Laurent Pinchart
2019-10-21 21:45 ` [PATCH 4/6] drm/cma-helper: Support DRM_MODE_DUMB_KERNEL_MAP flag Rob Herring
2019-10-22 6:13 ` james qian wang (Arm Technology China)
2019-10-22 7:50 ` Neil Armstrong
2019-10-22 11:30 ` Laurent Pinchart
2019-10-22 11:40 ` Geert Uytterhoeven
2019-10-22 19:52 ` Rob Herring
2019-10-22 20:02 ` Rob Herring
2019-10-23 14:27 ` Laurent Pinchart
2019-10-21 21:45 ` [PATCH 5/6] drm/mediatek: Convert to use CMA helpers Rob Herring
2019-10-22 17:07 ` Matthias Brugger
2019-10-23 17:42 ` Rob Herring
2019-10-23 21:06 ` CK Hu
2019-10-23 22:56 ` Rob Herring
2019-10-24 7:02 ` CK Hu
2019-12-17 1:12 ` Laurent Pinchart
2019-10-21 21:45 ` [PATCH 6/6] drm/rockchip: Convert to use generic fbdev emulation Rob Herring
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