From patchwork Tue Aug 6 13:34:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 11078921 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4335C746 for ; Tue, 6 Aug 2019 13:35:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 328F7287A0 for ; Tue, 6 Aug 2019 13:35:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 271DD28999; Tue, 6 Aug 2019 13:35:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BC561287A0 for ; Tue, 6 Aug 2019 13:35:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B73C16E392; Tue, 6 Aug 2019 13:35:02 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by gabe.freedesktop.org (Postfix) with ESMTPS id AF1216E388 for ; Tue, 6 Aug 2019 13:35:00 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 442B630C0624; Tue, 6 Aug 2019 13:35:00 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-144.ams2.redhat.com [10.36.116.144]) by smtp.corp.redhat.com (Postfix) with ESMTP id D10CA60933; Tue, 6 Aug 2019 13:34:55 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id BB86617446; Tue, 6 Aug 2019 15:34:54 +0200 (CEST) From: Gerd Hoffmann To: dri-devel@lists.freedesktop.org Subject: [PATCH 1/3] drm: add gem ttm helpers Date: Tue, 6 Aug 2019 15:34:52 +0200 Message-Id: <20190806133454.8254-2-kraxel@redhat.com> In-Reply-To: <20190806133454.8254-1-kraxel@redhat.com> References: <20190806133454.8254-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Tue, 06 Aug 2019 13:35:00 +0000 (UTC) X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Maxime Ripard , open list , David Airlie , Gerd Hoffmann , tzimmermann@suse.de, Sean Paul MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Now with ttm_buffer_object being a subclass of drm_gem_object we can easily lookup ttm_buffer_object for a given drm_gem_object, which in turm allows to create common helper functions. This patch starts off with dump mmap helpers. Signed-off-by: Gerd Hoffmann --- include/drm/drm_gem_ttm_helper.h | 27 +++++++++++++++ drivers/gpu/drm/drm_gem_ttm_helper.c | 52 ++++++++++++++++++++++++++++ drivers/gpu/drm/Kconfig | 7 ++++ drivers/gpu/drm/Makefile | 3 ++ 4 files changed, 89 insertions(+) create mode 100644 include/drm/drm_gem_ttm_helper.h create mode 100644 drivers/gpu/drm/drm_gem_ttm_helper.c diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h new file mode 100644 index 000000000000..2c6874190b17 --- /dev/null +++ b/include/drm/drm_gem_ttm_helper.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#ifndef DRM_GEM_TTM_HELPER_H +#define DRM_GEM_TTM_HELPER_H + +#include +#include +#include /* for container_of() */ + +/** + * Returns the container of type &struct ttm_buffer_object + * for field base. + * @gem: the GEM object + * Returns: The containing GEM VRAM object + */ +static inline struct ttm_buffer_object *drm_gem_ttm_of_gem( + struct drm_gem_object *gem) +{ + return container_of(gem, struct ttm_buffer_object, base); +} + +u64 drm_gem_ttm_mmap_offset(struct ttm_buffer_object *bo); +int drm_gem_ttm_driver_dumb_mmap_offset(struct drm_file *file, + struct drm_device *dev, + uint32_t handle, uint64_t *offset); + +#endif diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c new file mode 100644 index 000000000000..b069bd0c4c94 --- /dev/null +++ b/drivers/gpu/drm/drm_gem_ttm_helper.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include + +/** + * drm_gem_ttm_mmap_offset() - Returns a GEM ttm object's mmap offset + * @gbo: the GEM ttm object + * + * See drm_vma_node_offset_addr() for more information. + * + * Returns: + * The buffer object's offset for userspace mappings on success, or + * 0 if no offset is allocated. + */ +u64 drm_gem_ttm_mmap_offset(struct ttm_buffer_object *bo) +{ + return drm_vma_node_offset_addr(&bo->base.vma_node); +} +EXPORT_SYMBOL(drm_gem_ttm_mmap_offset); + +/** + * drm_gem_ttm_driver_dumb_mmap_offset() - \ + Implements &struct drm_driver.dumb_mmap_offset + * @file: DRM file pointer. + * @dev: DRM device. + * @handle: GEM handle + * @offset: Returns the mapping's memory offset on success + * + * Returns: + * 0 on success, or + * a negative errno code otherwise. + */ +int drm_gem_ttm_driver_dumb_mmap_offset(struct drm_file *file, + struct drm_device *dev, + uint32_t handle, uint64_t *offset) +{ + struct drm_gem_object *gem; + struct ttm_buffer_object *bo; + + gem = drm_gem_object_lookup(file, handle); + if (!gem) + return -ENOENT; + + bo = drm_gem_ttm_of_gem(gem); + *offset = drm_gem_ttm_mmap_offset(bo); + + drm_gem_object_put_unlocked(gem); + + return 0; +} +EXPORT_SYMBOL(drm_gem_ttm_driver_dumb_mmap_offset); + diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index e6f40fb54c9a..f7b25519f95c 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -172,6 +172,13 @@ config DRM_VRAM_HELPER help Helpers for VRAM memory management +config DRM_TTM_HELPER + tristate + depends on DRM + select DRM_TTM + help + Helpers for ttm-based gem objects + config DRM_GEM_CMA_HELPER bool depends on DRM diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 10f8329a8b71..545c61d6528b 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -37,6 +37,9 @@ drm_vram_helper-y := drm_gem_vram_helper.o \ drm_vram_mm_helper.o obj-$(CONFIG_DRM_VRAM_HELPER) += drm_vram_helper.o +drm_ttm_helper-y := drm_gem_ttm_helper.o +obj-$(CONFIG_DRM_TTM_HELPER) += drm_ttm_helper.o + drm_kms_helper-y := drm_crtc_helper.o drm_dp_helper.o drm_dsc.o drm_probe_helper.o \ drm_plane_helper.o drm_dp_mst_topology.o drm_atomic_helper.o \ drm_kms_helper_common.o drm_dp_dual_mode_helper.o \