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bh=6CtdHZn7M++63gs8y2acpS5Q+y2lx0SFvFzxFePDYuE=; b=MeszIvPBmQvYtJABOSEuf3uPcF2VTBvSVRGZD0D1HfTW9TfiKba+kHK6b42dXqD5nH+ldJ 6NHODzX+2ClIGIBQ== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id D54F51364F; Tue, 12 Mar 2024 15:48:36 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id nimeMlR58GUhPwAAD6G6ig (envelope-from ); Tue, 12 Mar 2024 15:48:36 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@gmail.com, deller@gmx.de, javierm@redhat.com Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH 00/43] drm: Provide fbdev emulation per memory manager Date: Tue, 12 Mar 2024 16:44:55 +0100 Message-ID: <20240312154834.26178-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Level: Authentication-Results: smtp-out2.suse.de; none X-Spamd-Result: default: False [-2.10 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com,gmx.de]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_SEVEN(0.00)[7]; MID_CONTAINS_FROM(1.00)[]; FREEMAIL_TO(0.00)[ffwll.ch,gmail.com,gmx.de,redhat.com]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-3.00)[100.00%] X-Spam-Score: -2.10 X-Spam-Flag: NO DRM provides 3 different memory managers with slightly different characteristics: DMA-based, SHMEM-based and TTM. This effects fbdev emulation as each requires different handling of mmap(). This series reworks fbdev emualtion to provide an optimized emulation for each of the memory managers. Patch 1 fixes a minor bug in fbdev-generic. Patches 2 to 8 implement fbdev-shmem, which is optimized for drivers with SHMEM-based allocation. Patches 2 to 7 prepare deferred I/O to support driver-custom page lookups. When the mmap'ed framebuffer sees a pagefault, the deferred-I/O code can ask the graphics driver of the page (instead of trying to detect it by itself). Using this hook, patch 8 implements fbdev-shmem. The code is similar to fbdev-generic, but does not require an additional shadow buffer for mmap(). Mmap'ed pages are instead provided from the GEM buffer object. That saves a few MiB of framebuffer memory and copying between the internal buffers. Patches 9 to 20 convert SHMEM-based drivers to fbdev-shmem. Patch 21 adds damage handling and deferred I/O to fbdev-dma. Such code has been tested on the DMA-based omapdrm and can be adopted for all drivers. Patches 22 to 41 convert DMA-based drivers to fbdev-dma. These drivers could not use it because of the missing support for damage handling. Patch 42 renames fbdev-generic to fbdev-ttm. Only TTM-based drivers still use it, so building it can be linked to TTM as well. Patch 43 cleans up the documentation. Tested with simpledrm, vc4 and amdgpu. Thomas Zimmermann (43): drm/fbdev-generic: Do not set physical framebuffer address fbdev/deferred-io: Move pageref setup into separate helper fbdev/deferred-io: Clean up pageref on lastclose fbdev/deferred-io: Test screen_buffer for vmalloc'ed memory fbdev/deferred-io: Test smem_start for I/O memory fbdev/deferred-io: Always call get_page() for framebuffer pages fbdev/deferred-io: Provide get_page hook in struct fb_deferred_io drm/fbdev: Add fbdev-shmem drm/ast: Use fbdev-shmem drm/gud: Use fbdev-shmem drm/hyperv: Use fbdev-shmem drm/mgag200: Use fbdev-shmem drm/solomon: Use fbdev-shmem drm/tiny/cirrus: Use fbdev-shmem drm/tiny/gm12u320: Use fbdev-shmem drm/tiny/ofdrm: Use fbdev-shmem drm/tiny/simpledrm: Use fbdev-shmem drm/udl: Use fbdev-shmem drm/virtio: Use fbdev-shmem drm/vkms: Use fbdev-shmem drm/fbdev-dma: Implement damage handling and deferred I/O drm/arm/komeda: Use fbdev-dma drm/hisilicon/kirin: Use fbdev-dma drm/imx/lcdc: Use fbdev-dma drm/ingenic: Use fbdev-dma drm/mediatek: Use fbdev-dma drm/panel/panel-ilitek-9341: Use fbdev-dma drm/renesas/rcar-du: Use fbdev-dma drm/renesas/rz-du: Use fbdev-dma drm/renesas/shmobile: Use fbdev-dma drm/rockchip: Use fbdev-dma drm/tiny/hx8357d: Use fbdev-dma drm/tiny/ili9163: Use fbdev-dma drm/tiny/ili9225: Use fbdev-dma drm/tiny/ili9341: Use fbdev-dma drm/tiny/ili9486: Use fbdev-dma drm/tiny/mi0283qt: Use fbdev-dma drm/tiny/panel-mipi-dbi: Use fbdev-dma drm/tiny/repaper: Use fbdev-dma drm/tiny/st7586: Use fbdev-dma drm/tiny/st7735r: Use fbdev-dma drm/fbdev-generic: Convert to fbdev-ttm drm/fbdev: Clean up fbdev documentation Documentation/gpu/drm-kms-helpers.rst | 12 +- Documentation/gpu/todo.rst | 13 - drivers/gpu/drm/Makefile | 6 +- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 +- .../gpu/drm/arm/display/komeda/komeda_drv.c | 4 +- drivers/gpu/drm/ast/ast_drv.c | 4 +- drivers/gpu/drm/drm_drv.c | 2 +- drivers/gpu/drm/drm_fb_helper.c | 11 +- drivers/gpu/drm/drm_fbdev_dma.c | 65 +++- drivers/gpu/drm/drm_fbdev_shmem.c | 316 ++++++++++++++++++ .../{drm_fbdev_generic.c => drm_fbdev_ttm.c} | 81 +++-- drivers/gpu/drm/gud/gud_drv.c | 4 +- .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 4 +- .../gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 4 +- drivers/gpu/drm/hyperv/hyperv_drm_drv.c | 4 +- drivers/gpu/drm/imx/lcdc/imx-lcdc.c | 4 +- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 4 +- drivers/gpu/drm/loongson/Kconfig | 1 + drivers/gpu/drm/loongson/lsdc_drv.c | 4 +- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 4 +- drivers/gpu/drm/mgag200/mgag200_drv.c | 4 +- drivers/gpu/drm/nouveau/nouveau_drm.c | 6 +- drivers/gpu/drm/panel/panel-ilitek-ili9341.c | 4 +- drivers/gpu/drm/qxl/qxl_drv.c | 4 +- drivers/gpu/drm/renesas/rcar-du/rcar_du_drv.c | 4 +- drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c | 4 +- .../gpu/drm/renesas/shmobile/shmob_drm_drv.c | 4 +- drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 4 +- drivers/gpu/drm/solomon/ssd130x.c | 4 +- drivers/gpu/drm/tiny/bochs.c | 4 +- drivers/gpu/drm/tiny/cirrus.c | 4 +- drivers/gpu/drm/tiny/gm12u320.c | 4 +- drivers/gpu/drm/tiny/hx8357d.c | 4 +- drivers/gpu/drm/tiny/ili9163.c | 4 +- drivers/gpu/drm/tiny/ili9225.c | 4 +- drivers/gpu/drm/tiny/ili9341.c | 4 +- drivers/gpu/drm/tiny/ili9486.c | 4 +- drivers/gpu/drm/tiny/mi0283qt.c | 4 +- drivers/gpu/drm/tiny/ofdrm.c | 4 +- drivers/gpu/drm/tiny/panel-mipi-dbi.c | 4 +- drivers/gpu/drm/tiny/repaper.c | 4 +- drivers/gpu/drm/tiny/simpledrm.c | 4 +- drivers/gpu/drm/tiny/st7586.c | 4 +- drivers/gpu/drm/tiny/st7735r.c | 4 +- drivers/gpu/drm/udl/udl_drv.c | 4 +- drivers/gpu/drm/vboxvideo/vbox_drv.c | 4 +- drivers/gpu/drm/virtio/virtgpu_drv.c | 4 +- drivers/gpu/drm/vkms/vkms_drv.c | 4 +- drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 4 +- drivers/video/fbdev/core/fb_defio.c | 82 +++-- include/drm/drm_fbdev_generic.h | 15 - include/drm/drm_fbdev_shmem.h | 15 + include/drm/drm_fbdev_ttm.h | 15 + include/drm/drm_mode_config.h | 4 +- include/linux/fb.h | 1 + 55 files changed, 593 insertions(+), 210 deletions(-) create mode 100644 drivers/gpu/drm/drm_fbdev_shmem.c rename drivers/gpu/drm/{drm_fbdev_generic.c => drm_fbdev_ttm.c} (76%) delete mode 100644 include/drm/drm_fbdev_generic.h create mode 100644 include/drm/drm_fbdev_shmem.h create mode 100644 include/drm/drm_fbdev_ttm.h