From: Rob Clark <robdclark(a)chromium.org>
Container fences have burner contexts, which makes the trick to store at
most one fence per context somewhat useless if we don't unwrap array or
chain fences.
Signed-off-by: Rob Clark <robdclark(a)chromium.org>
---
tbh, I'm not sure why we weren't doing this already, unless there is
something I'm overlooking
drivers/gpu/drm/scheduler/sched_main.c | 43 +++++++++++++++++---------
1 file changed, 28 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index c2ee44d6224b..f59e5335afbb 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -41,20 +41,21 @@
* 4. Entities themselves maintain a queue of jobs that will be scheduled on
* the hardware.
*
* The jobs in a entity are always scheduled in the order that they were pushed.
*/
#include <linux/kthread.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/completion.h>
+#include <linux/dma-fence-unwrap.h>
#include <linux/dma-resv.h>
#include <uapi/linux/sched/types.h>
#include <drm/drm_print.h>
#include <drm/drm_gem.h>
#include <drm/gpu_scheduler.h>
#include <drm/spsc_queue.h>
#define CREATE_TRACE_POINTS
#include "gpu_scheduler_trace.h"
@@ -665,41 +666,27 @@ void drm_sched_job_arm(struct drm_sched_job *job)
sched = entity->rq->sched;
job->sched = sched;
job->s_priority = entity->rq - sched->sched_rq;
job->id = atomic64_inc_return(&sched->job_id_count);
drm_sched_fence_init(job->s_fence, job->entity);
}
EXPORT_SYMBOL(drm_sched_job_arm);
-/**
- * drm_sched_job_add_dependency - adds the fence as a job dependency
- * @job: scheduler job to add the dependencies to
- * @fence: the dma_fence to add to the list of dependencies.
- *
- * Note that @fence is consumed in both the success and error cases.
- *
- * Returns:
- * 0 on success, or an error on failing to expand the array.
- */
-int drm_sched_job_add_dependency(struct drm_sched_job *job,
- struct dma_fence *fence)
+static int _add_dependency(struct drm_sched_job *job, struct dma_fence *fence)
{
struct dma_fence *entry;
unsigned long index;
u32 id = 0;
int ret;
- if (!fence)
- return 0;
-
/* Deduplicate if we already depend on a fence from the same context.
* This lets the size of the array of deps scale with the number of
* engines involved, rather than the number of BOs.
*/
xa_for_each(&job->dependencies, index, entry) {
if (entry->context != fence->context)
continue;
if (dma_fence_is_later(fence, entry)) {
dma_fence_put(entry);
@@ -709,20 +696,46 @@ int drm_sched_job_add_dependency(struct drm_sched_job *job,
}
return 0;
}
ret = xa_alloc(&job->dependencies, &id, fence, xa_limit_32b, GFP_KERNEL);
if (ret != 0)
dma_fence_put(fence);
return ret;
}
+
+/**
+ * drm_sched_job_add_dependency - adds the fence as a job dependency
+ * @job: scheduler job to add the dependencies to
+ * @fence: the dma_fence to add to the list of dependencies.
+ *
+ * Note that @fence is consumed in both the success and error cases.
+ *
+ * Returns:
+ * 0 on success, or an error on failing to expand the array.
+ */
+int drm_sched_job_add_dependency(struct drm_sched_job *job,
+ struct dma_fence *fence)
+{
+ struct dma_fence_unwrap iter;
+ struct dma_fence *f;
+ int ret = 0;
+
+ dma_fence_unwrap_for_each (f, &iter, fence) {
+ ret = _add_dependency(job, f);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
EXPORT_SYMBOL(drm_sched_job_add_dependency);
/**
* drm_sched_job_add_resv_dependencies - add all fences from the resv to the job
* @job: scheduler job to add the dependencies to
* @resv: the dma_resv object to get the fences from
* @usage: the dma_resv_usage to use to filter the fences
*
* This adds all fences matching the given usage from @resv to @job.
* Must be called with the @resv lock held.
--
2.39.2
From: Rob Clark <robdclark(a)chromium.org>
This is a re-post of the remaining patches from:
https://patchwork.freedesktop.org/series/114490/
Part of the hold-up of the remaining uabi patches was compositor
support, but now an MR for kwin exists:
https://invent.kde.org/plasma/kwin/-/merge_requests/4358
The syncobj userspace is:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21973
v1: https://patchwork.freedesktop.org/series/93035/
v2: Move filtering out of later deadlines to fence implementation
to avoid increasing the size of dma_fence
v3: Add support in fence-array and fence-chain; Add some uabi to
support igt tests and userspace compositors.
v4: Rebase, address various comments, and add syncobj deadline
support, and sync_file EPOLLPRI based on experience with perf/
freq issues with clvk compute workloads on i915 (anv)
v5: Clarify that this is a hint as opposed to a more hard deadline
guarantee, switch to using u64 ns values in UABI (still absolute
CLOCK_MONOTONIC values), drop syncobj related cap and driver
feature flag in favor of allowing count_handles==0 for probing
kernel support.
v6: Re-work vblank helper to calculate time of _start_ of vblank,
and work correctly if the last vblank event was more than a
frame ago. Add (mostly unrelated) drm/msm patch which also
uses the vblank helper. Use dma_fence_chain_contained(). More
verbose syncobj UABI comments. Drop DMA_FENCE_FLAG_HAS_DEADLINE_BIT.
v7: Fix kbuild complaints about vblank helper. Add more docs.
v8: Add patch to surface sync_file UAPI, and more docs updates.
v9: Repost the remaining patches that expose new uabi to userspace.
Rob Clark (3):
drm/syncobj: Add deadline support for syncobj waits
dma-buf/sync_file: Add SET_DEADLINE ioctl
dma-buf/sw_sync: Add fence deadline support
drivers/dma-buf/dma-fence.c | 3 +-
drivers/dma-buf/sw_sync.c | 82 ++++++++++++++++++++++++++++++++++
drivers/dma-buf/sync_debug.h | 2 +
drivers/dma-buf/sync_file.c | 19 ++++++++
drivers/gpu/drm/drm_syncobj.c | 64 ++++++++++++++++++++------
include/uapi/drm/drm.h | 17 +++++++
include/uapi/linux/sync_file.h | 22 +++++++++
7 files changed, 195 insertions(+), 14 deletions(-)
--
2.41.0
On Thu, Nov 30, 2023 at 06:14:16PM +0100, Marco Pagani wrote:
> This patch introduces an initial KUnit test suite for GEM objects
> backed by shmem buffers.
>
> Suggested-by: Javier Martinez Canillas <javierm(a)redhat.com>
> Signed-off-by: Marco Pagani <marpagan(a)redhat.com>
>
> v5:
> - using __drm_kunit_helper_alloc_drm_device() to avoid local struct
> v4:
> - Add missing MMU dependency for DRM_GEM_SHMEM_HELPER (kernel test robot)
> v3:
> - Explicitly cast pointers in the helpers
> - Removed unused pointer to parent dev in struct fake_dev
> - Test entries reordering in Kconfig and Makefile sent as a separate patch
> v2:
> - Improved description of test cases
> - Cleaner error handling using KUnit actions
> - Alphabetical order in Kconfig and Makefile
Applied to drm-misc-next, thanks!
Maxime
