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 D69F9C433DF for ; Wed, 29 Jul 2020 13:41:59 +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 B6D8B2070B for ; Wed, 29 Jul 2020 13:41:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B6D8B2070B 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 9F5E96E504; Wed, 29 Jul 2020 13:41:54 +0000 (UTC) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id A75626E504 for ; Wed, 29 Jul 2020 13:41:53 +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 03F4DABE2; Wed, 29 Jul 2020 13:42:04 +0000 (UTC) From: Thomas Zimmermann To: airlied@redhat.com, daniel@ffwll.ch, sam@ravnborg.org, kraxel@redhat.com, b.zolnierkie@samsung.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, jani.nikula@intel.com, peda@axentia.se, dan.carpenter@oracle.com, natechancellor@gmail.com Subject: [RFC][PATCH 0/5] Support GEM object mappings from I/O memory Date: Wed, 29 Jul 2020 15:41:43 +0200 Message-Id: <20200729134148.6855-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.27.0 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: linux-fbdev@vger.kernel.org, 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 sulotion tothe problem. This patchset adds a GEM object function that returns framebuffers as I/O memory. It further updates fbdev to use the new functionality and implements vmap_iomem for VRAM helpers. This is an RFC patchset to discuss the approach. It still needs testing and polish. Patch #4 has to be rebased onto the recent workaround. Thomas Zimmermann (5): fbdev: Remove trailing whitespace fbdev/core: Export framebuffer read and write code as cfb_ function drm: Add infrastructure for vmap operations of I/O memory drm/fb_helper: Use I/O-memory mappings if available drm/vram_helper: Implement struct drm_gem_object_funcs.vmap_iomem drivers/gpu/drm/ast/ast_cursor.c | 12 ++- drivers/gpu/drm/drm_client.c | 52 +++++++++- drivers/gpu/drm/drm_fb_helper.c | 132 ++++++++++++++++++++++---- drivers/gpu/drm/drm_gem.c | 19 ++++ drivers/gpu/drm/drm_gem_vram_helper.c | 106 +++++++++++++++++++-- drivers/gpu/drm/drm_internal.h | 1 + drivers/video/fbdev/core/fbmem.c | 61 ++++++++---- include/drm/drm_client.h | 8 +- include/drm/drm_gem.h | 17 +++- include/drm/drm_gem_vram_helper.h | 1 + include/linux/fb.h | 23 +++-- 11 files changed, 369 insertions(+), 63 deletions(-) -- 2.27.0 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel