From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 338A7C433E3 for ; Thu, 6 Aug 2020 11:20:40 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8F5EE206B5 for ; Thu, 6 Aug 2020 11:20:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8F5EE206B5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3CE756E89B; Thu, 6 Aug 2020 08:52:46 +0000 (UTC) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id A0DC96E899 for ; Thu, 6 Aug 2020 08:52:44 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 4F518ABE9; Thu, 6 Aug 2020 08:53:00 +0000 (UTC) From: Thomas Zimmermann To: airlied@redhat.com, daniel@ffwll.ch, kraxel@redhat.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, hdegoede@redhat.com, sean@poorly.run, sam@ravnborg.org, emil.l.velikov@gmail.com, lyude@redhat.com, noralf@tronnes.org, zou_wei@huawei.com Subject: [RFC][PATCH v2 0/4] Support GEM object mappings from I/O memory Date: Thu, 6 Aug 2020 10:52:35 +0200 Message-Id: <20200806085239.4606-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Zimmermann , dri-devel@lists.freedesktop.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" DRM's fbdev console uses regular load and store operations to update framebuffer memory. The bochs driver on sparc64 requires the use of I/O-specific load and store operations. We have a workaround, but need a long-term solution to the problem. Previous attempts to resolve the issue returned an extra is_iomem flag from vmap(), or added a separate vmap_iomem() callback to GEM objects. This patchset is yet another iteration with a different idea. Instead of a raw pointer, vmap() interfaces now return a structure that contains the buffer address in system or I/O memory, plus a flag that signals which location the address is in. Patch #1 updates the vboxvideo driver to match the latest VRAM helpers. This simplifies the other patches and should be merged in any case. Patch #2 adds struct drm_gem_membuf, which contains the pointer and flag, and converts the generic GEM interfaces to use it. Patch #3 converts vmap/vunmap in GEM object functions and updates most GEM backends. A few drivers are still missing, but the patch should be acceptable for an RFC. Patch #4 changes fbdev helpers to access framebuffer memory either with system or I/O memcpy functions. Thomas Zimmermann (4): drm/vboxvideo: Use drm_gem_vram_vmap() interfaces drm/gem: Update client API to use struct drm_gem_membuf drm/gem: Use struct drm_gem_membuf in vmap op and convert GEM backends drm/fb_helper: Access framebuffer as I/O memory, if required drivers/gpu/drm/ast/ast_cursor.c | 29 ++- drivers/gpu/drm/ast/ast_drv.h | 2 +- drivers/gpu/drm/bochs/bochs_kms.c | 1 - drivers/gpu/drm/drm_client.c | 25 ++- drivers/gpu/drm/drm_fb_helper.c | 246 ++++++++++++++++++++++--- drivers/gpu/drm/drm_gem.c | 28 +-- drivers/gpu/drm/drm_gem_cma_helper.c | 15 +- drivers/gpu/drm/drm_gem_shmem_helper.c | 31 ++-- drivers/gpu/drm/drm_gem_vram_helper.c | 142 +++++--------- drivers/gpu/drm/drm_internal.h | 5 +- drivers/gpu/drm/drm_prime.c | 16 +- drivers/gpu/drm/mgag200/mgag200_mode.c | 11 +- drivers/gpu/drm/qxl/qxl_display.c | 12 +- drivers/gpu/drm/qxl/qxl_draw.c | 14 +- drivers/gpu/drm/qxl/qxl_drv.h | 6 +- drivers/gpu/drm/qxl/qxl_object.c | 19 +- drivers/gpu/drm/qxl/qxl_object.h | 2 +- drivers/gpu/drm/qxl/qxl_prime.c | 12 +- drivers/gpu/drm/tiny/cirrus.c | 15 +- drivers/gpu/drm/tiny/gm12u320.c | 12 +- drivers/gpu/drm/udl/udl_modeset.c | 10 +- drivers/gpu/drm/vboxvideo/vbox_mode.c | 17 +- include/drm/drm_client.h | 7 +- include/drm/drm_device.h | 26 +++ include/drm/drm_gem.h | 5 +- include/drm/drm_gem_cma_helper.h | 4 +- include/drm/drm_gem_shmem_helper.h | 4 +- include/drm/drm_gem_vram_helper.h | 9 +- include/drm/drm_mode_config.h | 12 -- 29 files changed, 464 insertions(+), 273 deletions(-) -- 2.28.0 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel