From patchwork Tue Jul 10 13:32:46 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cooper Yuan X-Patchwork-Id: 1177581 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by patchwork1.kernel.org (Postfix) with ESMTP id B0EC940B37 for ; Tue, 10 Jul 2012 13:36:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 269F8A0A07 for ; Tue, 10 Jul 2012 06:36:39 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-lb0-f177.google.com (mail-lb0-f177.google.com [209.85.217.177]) by gabe.freedesktop.org (Postfix) with ESMTP id 2CF33A0A0A for ; Tue, 10 Jul 2012 06:33:26 -0700 (PDT) Received: by mail-lb0-f177.google.com with SMTP id gg6so290787lbb.36 for ; Tue, 10 Jul 2012 06:33:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:cc:content-type; bh=//F81RkPvkk/+7CS+EAk6RiRr7xAvTKcwJwH9V296JQ=; b=XTaaNzzOYVPsT+kdp5hADdqJuAO710I4IUsvZAGhmQnvdavjJA2XnRMpSpDrg+Oa51 58tzfn70IDBfRrRINlPfuUD2Akbj4b9LYlwSYlhnU7zAqbQfx9i3W2VXAzpu2/uYtxTY T6I9NAYUShiU6wTAsuTgiLOl3vVy3xJKfX88wDC7q09LwzmTiAZr+H3zxwgITTIYU2gs BT1QEtOMJZ1Zan1oHM/CpeVij6pvrdzI+Gus3zFJFRMwQU19FoptNGiRaq5u0hJspNJr T9pGsfRU2rYl9cRTBoNU6jpp/YIiGN9eiHbQTjd7QyB21SYQ9oGjbDQ5KJNT3L9BUkqZ D1yw== Received: by 10.112.27.226 with SMTP id w2mr20374222lbg.57.1341927206793; Tue, 10 Jul 2012 06:33:26 -0700 (PDT) MIME-Version: 1.0 Received: by 10.114.9.66 with HTTP; Tue, 10 Jul 2012 06:32:46 -0700 (PDT) From: Cooper Yuan Date: Tue, 10 Jul 2012 15:32:46 +0200 Message-ID: Subject: [PATCH 2/3] drm/exynos: add dmabuf mmap function To: dri-devel@lists.freedesktop.org Cc: Inki Dae X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org Errors-To: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org implement mmap function of dma_buf_ops. Signed-off-by: Cooper Yuan --- drivers/gpu/drm/exynos/exynos_drm_dmabuf.c | 38 ++++++++++++++++++++++++++++ 1 files changed, 38 insertions(+), 0 deletions(-) .map_dma_buf = exynos_gem_map_dma_buf, .unmap_dma_buf = exynos_gem_unmap_dma_buf, @@ -172,6 +209,7 @@ static struct dma_buf_ops exynos_dmabuf_ops = { .kunmap = exynos_gem_dmabuf_kunmap, .kunmap_atomic = exynos_gem_dmabuf_kunmap_atomic, .release = exynos_dmabuf_release, + .mmap = exynos_gem_dmabuf_mmap, }; struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev, diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c index e4eeb0b..913a23e 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c @@ -164,6 +164,43 @@ static void exynos_gem_dmabuf_kunmap(struct dma_buf *dma_buf, /* TODO */ } +static int exynos_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma) +{ + struct exynos_drm_gem_obj *exynos_gem_obj = dma_buf->priv; + struct drm_device *dev = exynos_gem_obj->base.dev; + struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer; + int ret = 0; + if (WARN_ON(!exynos_gem_obj->base.filp)) + return -EINVAL; + + /* Check for valid size. */ + if (buf->size < vma->vm_end - vma->vm_start) { + ret = -EINVAL; + goto out_unlock; + } + + if (!dev->driver->gem_vm_ops) { + ret = -EINVAL; + goto out_unlock; + } + + vma->vm_flags |= VM_RESERVED | VM_IO | VM_MIXEDMAP | VM_DONTEXPAND; + vma->vm_ops = dev->driver->gem_vm_ops; + vma->vm_private_data = exynos_gem_obj; + vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); + + /* Take a ref for this mapping of the object, so that the fault + * handler can dereference the mmap offset's pointer to the object. + * This reference is cleaned up by the corresponding vm_close + * (which should happen whether the vma was created by this call, or + * by a vm_open due to mremap or partial unmap or whatever). + */ + vma->vm_ops->open(vma); + +out_unlock: + return ret; +} + static struct dma_buf_ops exynos_dmabuf_ops = {