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drm/vc4: Syncobj import support

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Allow userland to specify a syncobj that is waited on before a render job
starts processing.

v2: Use 0 as invalid syncobj to drop flag (Eric)
    Drop extra newline (Eric)

Signed-off-by: Stefan Schake <stschake@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/1524607427-12876-2-git-send-email-stschake@gmail.com
This commit is contained in:
Stefan Schake 2018-04-25 00:03:45 +02:00 committed by Eric Anholt
parent 3481fe768f
commit 818f5c8f4c
3 changed files with 29 additions and 9 deletions
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1
drivers/gpu/drm/vc4/vc4_drv.h
View File

@ -11,6 +11,7 @@
#include <drm/drm_encoder.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_syncobj.h>
#include "uapi/drm/vc4_drm.h"

30
drivers/gpu/drm/vc4/vc4_gem.c
View File

@ -27,6 +27,7 @@
#include <linux/device.h>
#include <linux/io.h>
#include <linux/sched/signal.h>
#include <linux/dma-fence-array.h>
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
@ -1115,6 +1116,7 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
struct drm_vc4_submit_cl *args = data;
struct vc4_exec_info *exec;
struct ww_acquire_ctx acquire_ctx;
struct dma_fence *in_fence;
int ret = 0;
if ((args->flags & ~(VC4_SUBMIT_CL_USE_CLEAR_COLOR |
@ -1125,11 +1127,6 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
if (args->pad2 != 0) {
DRM_DEBUG("->pad2 must be set to zero\n");
return -EINVAL;
}
exec = kcalloc(1, sizeof(*exec), GFP_KERNEL);
if (!exec) {
DRM_ERROR("malloc failure on exec struct\n");
@ -1164,6 +1161,29 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
}
}
if (args->in_sync) {
ret = drm_syncobj_find_fence(file_priv, args->in_sync,
&in_fence);
if (ret)
goto fail;
/* When the fence (or fence array) is exclusively from our
* context we can skip the wait since jobs are executed in
* order of their submission through this ioctl and this can
* only have fences from a prior job.
*/
if (!dma_fence_match_context(in_fence,
vc4->dma_fence_context)) {
ret = dma_fence_wait(in_fence, true);
if (ret) {
dma_fence_put(in_fence);
goto fail;
}
}
dma_fence_put(in_fence);
}
if (exec->args->bin_cl_size != 0) {
ret = vc4_get_bcl(dev, exec);
if (ret)

7
include/uapi/drm/vc4_drm.h
View File

@ -183,11 +183,10 @@ struct drm_vc4_submit_cl {
/* ID of the perfmon to attach to this job. 0 means no perfmon. */
__u32 perfmonid;
/* Unused field to align this struct on 64 bits. Must be set to 0.
* If one ever needs to add an u32 field to this struct, this field
* can be used.
/* Syncobj handle to wait on. If set, processing of this render job
* will not start until the syncobj is signaled. 0 means ignore.
*/
__u32 pad2;
__u32 in_sync;
};
/**