From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Stevens Subject: [PATCH v3 2/4] drm/prime: add support for virtio exported objects Date: Wed, 11 Mar 2020 20:20:02 +0900 Message-ID: <20200311112004.47138-3-stevensd@chromium.org> References: <20200311112004.47138-1-stevensd@chromium.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: In-Reply-To: <20200311112004.47138-1-stevensd@chromium.org> To: Gerd Hoffmann , David Airlie Cc: Daniel Vetter , "Michael S . Tsirkin" , Jason Wang , Sumit Semwal , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Stevens , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, virtio-dev@lists.oasis-open.org List-Id: virtualization@lists.linuxfoundation.org This change exposes dma-buf's get_uuid callback to PRIME drivers. Signed-off-by: David Stevens --- drivers/gpu/drm/drm_prime.c | 23 +++++++++++++++++++++++ include/drm/drm_drv.h | 10 ++++++++++ 2 files changed, 33 insertions(+) diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 86d9b0e45c8c..50fed8497d3c 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -779,6 +779,28 @@ int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma) } EXPORT_SYMBOL(drm_gem_dmabuf_mmap); +/** + * drm_gem_dmabuf_get_uuid - dma_buf get_uuid implementation for GEM + * @dma_buf: buffer to query + * @uuid: uuid outparam + * + * Queries the buffer's virtio UUID. This can be used as the + * &dma_buf_ops.get_uuid callback. Calls into &drm_driver.gem_prime_get_uuid. + * + * Returns 0 on success or a negative error code on failure. + */ +int drm_gem_dmabuf_get_uuid(struct dma_buf *dma_buf, uuid_t *uuid) +{ + struct drm_gem_object *obj = dma_buf->priv; + struct drm_device *dev = obj->dev; + + if (!dev->driver->gem_prime_get_uuid) + return -ENODEV; + + return dev->driver->gem_prime_get_uuid(obj, uuid); +} +EXPORT_SYMBOL(drm_gem_dmabuf_get_uuid); + static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = { .cache_sgt_mapping = true, .attach = drm_gem_map_attach, @@ -789,6 +811,7 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = { .mmap = drm_gem_dmabuf_mmap, .vmap = drm_gem_dmabuf_vmap, .vunmap = drm_gem_dmabuf_vunmap, + .get_uuid = drm_gem_dmabuf_get_uuid, }; /** diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index 77685ed7aa65..61e3ff341844 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -29,6 +29,7 @@ #include #include +#include #include @@ -639,6 +640,15 @@ struct drm_driver { int (*gem_prime_mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma); + /** + * @gem_prime_get_uuid + * + * get_uuid hook for GEM drivers. Retrieves the virtio uuid of the + * given GEM buffer. + */ + int (*gem_prime_get_uuid)(struct drm_gem_object *obj, + uuid_t *uuid); + /** * @dumb_create: * -- 2.25.1.481.gfbce0eb801-goog