From: Jordan Crouse <jcrouse@codeaurora.org>
To: freedreno@lists.freedesktop.org
Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
Sushmita Susheelendra <ssusheel@codeaurora.org>
Subject: [PATCH 3/6] drm/msm: Map command buffers to kernel only if required
Date: Tue, 3 Oct 2017 09:27:03 -0600 [thread overview]
Message-ID: <1507044426-4042-4-git-send-email-jcrouse@codeaurora.org> (raw)
In-Reply-To: <1507044426-4042-1-git-send-email-jcrouse@codeaurora.org>
From: Sushmita Susheelendra <ssusheel@codeaurora.org>
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 <ssusheel@codeaurora.org>
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---
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
next prev parent reply other threads:[~2017-10-03 15:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-03 15:27 [PATCH 0/6] drm/msm: Fixes and updates for 4.15 Jordan Crouse
[not found] ` <1507044426-4042-1-git-send-email-jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2017-10-03 15:27 ` [PATCH 1/6] drm/msm: Fix race condition in the submit path Jordan Crouse
2017-10-03 15:27 ` [PATCH 2/6] drm/msm: dump a rd GPUADDR header for all buffers in the command Jordan Crouse
2017-10-03 15:27 ` [PATCH 5/6] drm/msm: Change MSM_DRM_SUBMITQUEUE_CLOSE Jordan Crouse
2017-10-03 15:27 ` Jordan Crouse [this message]
2017-10-03 15:27 ` [PATCH 4/6] drm/msm: Map buffers on demand on the submit path Jordan Crouse
2017-10-03 15:27 ` [PATCH 6/6] drm/msm: Do priority checking during submitqueue create Jordan Crouse
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