From mboxrd@z Thu Jan 1 00:00:00 1970 From: Liam Mark Subject: [PATCH 4/4] staging: android: ion: Support for mapping with dma mapping attributes Date: Fri, 18 Jan 2019 10:37:47 -0800 Message-ID: <1547836667-13695-5-git-send-email-lmark@codeaurora.org> References: <1547836667-13695-1-git-send-email-lmark@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1547836667-13695-1-git-send-email-lmark@codeaurora.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: labbott@redhat.com, sumit.semwal@linaro.org Cc: devel@driverdev.osuosl.org, tkjos@android.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, afd@ti.com, linaro-mm-sig@lists.linaro.org, arve@android.com, john.stultz@linaro.org, joel@joelfernandes.org, maco@android.com, christian@brauner.io List-Id: dri-devel@lists.freedesktop.org Add support for configuring dma mapping attributes when mapping and unmapping memory through dma_buf_map_attachment and dma_buf_unmap_attachment. For example this will allow ION clients to skip cache maintenance, by using DMA_ATTR_SKIP_CPU_SYNC, for buffers which are clean and haven't been accessed by the CPU. Signed-off-by: Liam Mark --- drivers/staging/android/ion/ion.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index 1fe633a7fdba..0aae845b20ba 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -268,8 +268,8 @@ static struct sg_table *ion_map_dma_buf(struct dma_buf_attachment *attachment, table = a->table; mutex_lock(&buffer->lock); - if (!dma_map_sg(attachment->dev, table->sgl, table->nents, - direction)) { + if (!dma_map_sg_attrs(attachment->dev, table->sgl, table->nents, + direction, attachment->dma_map_attrs)) { mutex_unlock(&buffer->lock); return ERR_PTR(-ENOMEM); } @@ -287,7 +287,8 @@ static void ion_unmap_dma_buf(struct dma_buf_attachment *attachment, struct ion_buffer *buffer = attachment->dmabuf->priv; mutex_lock(&buffer->lock); - dma_unmap_sg(attachment->dev, table->sgl, table->nents, direction); + dma_unmap_sg_attrs(attachment->dev, table->sgl, table->nents, direction, + attachment->dma_map_attrs); a->dma_mapped = false; mutex_unlock(&buffer->lock); } -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project