6.14-stable review patch. If anyone has any objections, please let me know.
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From: Lizhi Hou lizhi.hou@amd.com
[ Upstream commit 4fd6ca90fc7f509977585d39885f21b2911123f3 ]
It is required by firmware to wait up to 2 seconds for pending commands before sending the destroy hardware context command. After 2 seconds wait, if there are still pending commands, driver needs to cancel them.
So the context destroy steps need to be: 1. Stop drm scheduler. (drm_sched_entity_destroy) 2. Wait up to 2 seconds for pending commands. 3. Destroy hardware context and cancel the rest pending requests. 4. Wait all jobs associated with the hwctx are freed. 5. Free job resources.
Signed-off-by: Lizhi Hou lizhi.hou@amd.com Reviewed-by: Jeffrey Hugo quic_jhugo@quicinc.com Signed-off-by: Jeffrey Hugo quic_jhugo@quicinc.com Link: https://patchwork.freedesktop.org/patch/msgid/20250124173536.148676-1-lizhi.... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/accel/amdxdna/aie2_ctx.c | 29 ++++++++++++++++------------- drivers/accel/amdxdna/amdxdna_ctx.c | 2 ++ drivers/accel/amdxdna/amdxdna_ctx.h | 3 +++ 3 files changed, 21 insertions(+), 13 deletions(-)
diff --git a/drivers/accel/amdxdna/aie2_ctx.c b/drivers/accel/amdxdna/aie2_ctx.c index 5f43db02b2404..92c768b0c9a03 100644 --- a/drivers/accel/amdxdna/aie2_ctx.c +++ b/drivers/accel/amdxdna/aie2_ctx.c @@ -34,6 +34,8 @@ static void aie2_job_release(struct kref *ref)
job = container_of(ref, struct amdxdna_sched_job, refcnt); amdxdna_sched_job_cleanup(job); + atomic64_inc(&job->hwctx->job_free_cnt); + wake_up(&job->hwctx->priv->job_free_wq); if (job->out_fence) dma_fence_put(job->out_fence); kfree(job); @@ -134,7 +136,8 @@ static void aie2_hwctx_wait_for_idle(struct amdxdna_hwctx *hwctx) if (!fence) return;
- dma_fence_wait(fence, false); + /* Wait up to 2 seconds for fw to finish all pending requests */ + dma_fence_wait_timeout(fence, false, msecs_to_jiffies(2000)); dma_fence_put(fence); }
@@ -616,6 +619,7 @@ int aie2_hwctx_init(struct amdxdna_hwctx *hwctx) hwctx->status = HWCTX_STAT_INIT; ndev = xdna->dev_handle; ndev->hwctx_num++; + init_waitqueue_head(&priv->job_free_wq);
XDNA_DBG(xdna, "hwctx %s init completed", hwctx->name);
@@ -652,25 +656,23 @@ void aie2_hwctx_fini(struct amdxdna_hwctx *hwctx) xdna = hwctx->client->xdna; ndev = xdna->dev_handle; ndev->hwctx_num--; - drm_sched_wqueue_stop(&hwctx->priv->sched);
- /* Now, scheduler will not send command to device. */ + XDNA_DBG(xdna, "%s sequence number %lld", hwctx->name, hwctx->priv->seq); + drm_sched_entity_destroy(&hwctx->priv->entity); + + aie2_hwctx_wait_for_idle(hwctx); + + /* Request fw to destroy hwctx and cancel the rest pending requests */ aie2_release_resource(hwctx);
- /* - * All submitted commands are aborted. - * Restart scheduler queues to cleanup jobs. The amdxdna_sched_job_run() - * will return NODEV if it is called. - */ - drm_sched_wqueue_start(&hwctx->priv->sched); + /* Wait for all submitted jobs to be completed or canceled */ + wait_event(hwctx->priv->job_free_wq, + atomic64_read(&hwctx->job_submit_cnt) == + atomic64_read(&hwctx->job_free_cnt));
- aie2_hwctx_wait_for_idle(hwctx); - drm_sched_entity_destroy(&hwctx->priv->entity); drm_sched_fini(&hwctx->priv->sched); aie2_ctx_syncobj_destroy(hwctx);
- XDNA_DBG(xdna, "%s sequence number %lld", hwctx->name, hwctx->priv->seq); - for (idx = 0; idx < ARRAY_SIZE(hwctx->priv->cmd_buf); idx++) drm_gem_object_put(to_gobj(hwctx->priv->cmd_buf[idx])); amdxdna_gem_unpin(hwctx->priv->heap); @@ -879,6 +881,7 @@ int aie2_cmd_submit(struct amdxdna_hwctx *hwctx, struct amdxdna_sched_job *job, drm_gem_unlock_reservations(job->bos, job->bo_cnt, &acquire_ctx);
aie2_job_put(job); + atomic64_inc(&hwctx->job_submit_cnt);
return 0;
diff --git a/drivers/accel/amdxdna/amdxdna_ctx.c b/drivers/accel/amdxdna/amdxdna_ctx.c index d11b1c83d9c3b..43442b9e273b3 100644 --- a/drivers/accel/amdxdna/amdxdna_ctx.c +++ b/drivers/accel/amdxdna/amdxdna_ctx.c @@ -220,6 +220,8 @@ int amdxdna_drm_create_hwctx_ioctl(struct drm_device *dev, void *data, struct dr args->syncobj_handle = hwctx->syncobj_hdl; mutex_unlock(&xdna->dev_lock);
+ atomic64_set(&hwctx->job_submit_cnt, 0); + atomic64_set(&hwctx->job_free_cnt, 0); XDNA_DBG(xdna, "PID %d create HW context %d, ret %d", client->pid, args->handle, ret); drm_dev_exit(idx); return 0; diff --git a/drivers/accel/amdxdna/amdxdna_ctx.h b/drivers/accel/amdxdna/amdxdna_ctx.h index 80b0304193ec3..f0a4a8586d858 100644 --- a/drivers/accel/amdxdna/amdxdna_ctx.h +++ b/drivers/accel/amdxdna/amdxdna_ctx.h @@ -87,6 +87,9 @@ struct amdxdna_hwctx { struct amdxdna_qos_info qos; struct amdxdna_hwctx_param_config_cu *cus; u32 syncobj_hdl; + + atomic64_t job_submit_cnt; + atomic64_t job_free_cnt ____cacheline_aligned_in_smp; };
#define drm_job_to_xdna_job(j) \