From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jordan Crouse Subject: [PATCH 3/6] drm/msm: Map command buffers to kernel only if required Date: Tue, 3 Oct 2017 09:27:03 -0600 Message-ID: <1507044426-4042-4-git-send-email-jcrouse@codeaurora.org> References: <1507044426-4042-1-git-send-email-jcrouse@codeaurora.org> Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:45268 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751969AbdJCP1N (ORCPT ); Tue, 3 Oct 2017 11:27:13 -0400 In-Reply-To: <1507044426-4042-1-git-send-email-jcrouse@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org To: freedreno@lists.freedesktop.org Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, Sushmita Susheelendra From: Sushmita Susheelendra Map command buffers to the kernel address space only if relocs are specified for the submission. This reduces some overhead on the submission path. Signed-off-by: Sushmita Susheelendra Signed-off-by: Jordan Crouse --- drivers/gpu/drm/msm/msm_gem_submit.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c index 2708d3a..2d2aa65 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -320,6 +320,9 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob return -EINVAL; } + if (nr_relocs == 0) + return 0; + /* For now, just map the entire thing. Eventually we probably * to do it page-by-page, w/ kmap() if not vmap()d.. */ -- 1.9.1