From patchwork Sat Nov 10 14:56:44 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Noralf_Tr=C3=B8nnes?= X-Patchwork-Id: 10677219 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 2BADD14DB for ; Sat, 10 Nov 2018 14:57:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1ADA92C897 for ; Sat, 10 Nov 2018 14:57:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0F9122CA4F; Sat, 10 Nov 2018 14:57:28 +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 BBFFD2C897 for ; Sat, 10 Nov 2018 14:57:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7E9486E0FB; Sat, 10 Nov 2018 14:57:21 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from smtp.domeneshop.no (smtp.domeneshop.no [IPv6:2a01:5b40:0:3005::1]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0E92F6E005; Sat, 10 Nov 2018 14:57:20 +0000 (UTC) Received: from 211.81-166-168.customer.lyse.net ([81.166.168.211]:42860 helo=localhost.localdomain) by smtp.domeneshop.no with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.84_2) (envelope-from ) id 1gLUhK-00006h-41; Sat, 10 Nov 2018 15:57:18 +0100 From: =?utf-8?q?Noralf_Tr=C3=B8nnes?= To: dri-devel@lists.freedesktop.org Date: Sat, 10 Nov 2018 15:56:44 +0100 Message-Id: <20181110145647.17580-3-noralf@tronnes.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20181110145647.17580-1-noralf@tronnes.org> References: <20181110145647.17580-1-noralf@tronnes.org> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 2/5] drm/prime: Add drm_gem_prime_mmap() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: david@lechnology.com, intel-gfx@lists.freedesktop.org, =?utf-8?q?Noralf_?= =?utf-8?q?Tr=C3=B8nnes?= , sam@ravnborg.org, christian.koenig@amd.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Add a generic PRIME GEM mmap function. v2: Fix link in docs (Daniel Vetter) Suggested-by: Daniel Vetter Signed-off-by: Noralf Trønnes Reviewed-by: Daniel Vetter --- drivers/gpu/drm/drm_prime.c | 37 +++++++++++++++++++++++++++++++++++++ include/drm/drm_prime.h | 1 + 2 files changed, 38 insertions(+) diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index ba6c7e02a2ae..6a4fe0216e27 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -651,6 +651,43 @@ int drm_gem_prime_handle_to_fd(struct drm_device *dev, } EXPORT_SYMBOL(drm_gem_prime_handle_to_fd); +/** + * drm_gem_prime_mmap - PRIME mmap function for GEM drivers + * @obj: GEM object + * @vma: Virtual address range + * + * This function sets up a userspace mapping for PRIME exported buffers using + * the same codepath that is used for regular GEM buffer mapping on the DRM fd. + * The fake GEM offset is added to vma->vm_pgoff and &drm_driver->fops->mmap is + * called to set up the mapping. + * + * Drivers can use this as their &drm_driver.gem_prime_mmap callback. + */ +int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) +{ + /* Used by drm_gem_mmap() to lookup the GEM object */ + struct drm_file priv = { + .minor = obj->dev->primary, + }; + struct file fil = { + .private_data = &priv, + }; + int ret; + + ret = drm_vma_node_allow(&obj->vma_node, &priv); + if (ret) + return ret; + + vma->vm_pgoff += drm_vma_node_start(&obj->vma_node); + + ret = obj->dev->driver->fops->mmap(&fil, vma); + + drm_vma_node_revoke(&obj->vma_node, &priv); + + return ret; +} +EXPORT_SYMBOL(drm_gem_prime_mmap); + /** * drm_gem_prime_import_dev - core implementation of the import callback * @dev: drm_device to import into diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h index e2032fbc0f08..b03731a3f079 100644 --- a/include/drm/drm_prime.h +++ b/include/drm/drm_prime.h @@ -70,6 +70,7 @@ struct dma_buf *drm_gem_prime_export(struct drm_device *dev, int drm_gem_prime_handle_to_fd(struct drm_device *dev, struct drm_file *file_priv, uint32_t handle, uint32_t flags, int *prime_fd); +int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev, struct dma_buf *dma_buf);