On 30/06/2021 07:27, Boris Brezillon wrote:
> If the process who submitted these jobs decided to close the FD before
> the jobs are done it probably means it doesn't care about the result.
>
> v5:
> * Add a panfrost_exception_is_fault() helper and the
> DRM_PANFROST_EXCEPTION_MAX_NON_FAULT value
>
> v4:
> * Don't disable/restore irqs when taking the job_lock (not needed since
> this lock is never taken from an interrupt context)
>
> v3:
> * Set fence error to ECANCELED when a TERMINATED exception is received
>
> Signed-off-by: Boris Brezillon <boris.brezil...@collabora.com>
> ---
> drivers/gpu/drm/panfrost/panfrost_device.h | 7 ++++
> drivers/gpu/drm/panfrost/panfrost_job.c | 42 ++++++++++++++++++----
> 2 files changed, 43 insertions(+), 6 deletions(-)
The panfrost_exception_is_fault() makes the code much more readable -
thanks!
Reviewed-by: Steven Price <steven.pr...@arm.com>
>
> diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h
> b/drivers/gpu/drm/panfrost/panfrost_device.h
> index 68e93b7e5b61..193cd87f643c 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_device.h
> +++ b/drivers/gpu/drm/panfrost/panfrost_device.h
> @@ -184,6 +184,7 @@ enum drm_panfrost_exception_type {
> DRM_PANFROST_EXCEPTION_KABOOM = 0x05,
> DRM_PANFROST_EXCEPTION_EUREKA = 0x06,
> DRM_PANFROST_EXCEPTION_ACTIVE = 0x08,
> + DRM_PANFROST_EXCEPTION_MAX_NON_FAULT = 0x3f,
> DRM_PANFROST_EXCEPTION_JOB_CONFIG_FAULT = 0x40,
> DRM_PANFROST_EXCEPTION_JOB_POWER_FAULT = 0x41,
> DRM_PANFROST_EXCEPTION_JOB_READ_FAULT = 0x42,
> @@ -244,6 +245,12 @@ enum drm_panfrost_exception_type {
> DRM_PANFROST_EXCEPTION_MEM_ATTR_NONCACHE_3 = 0xef,
> };
>
> +static inline bool
> +panfrost_exception_is_fault(u32 exception_code)
> +{
> + return exception_code > DRM_PANFROST_EXCEPTION_MAX_NON_FAULT;
> +}
> +
> const char *panfrost_exception_name(u32 exception_code);
> bool panfrost_exception_needs_reset(const struct panfrost_device *pfdev,
> u32 exception_code);
> diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c
> b/drivers/gpu/drm/panfrost/panfrost_job.c
> index cf5f9e8b2a27..8a0db9571bfd 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_job.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_job.c
> @@ -483,14 +483,21 @@ static void panfrost_job_handle_irq(struct
> panfrost_device *pfdev, u32 status)
>
> if (status & JOB_INT_MASK_ERR(j)) {
> u32 js_status = job_read(pfdev, JS_STATUS(j));
> + const char *exception_name =
> panfrost_exception_name(js_status);
>
> job_write(pfdev, JS_COMMAND_NEXT(j), JS_COMMAND_NOP);
>
> - dev_err(pfdev->dev, "js fault, js=%d, status=%s,
> head=0x%x, tail=0x%x",
> - j,
> - panfrost_exception_name(js_status),
> - job_read(pfdev, JS_HEAD_LO(j)),
> - job_read(pfdev, JS_TAIL_LO(j)));
> + if (!panfrost_exception_is_fault(js_status)) {
> + dev_dbg(pfdev->dev, "js interrupt, js=%d,
> status=%s, head=0x%x, tail=0x%x",
> + j, exception_name,
> + job_read(pfdev, JS_HEAD_LO(j)),
> + job_read(pfdev, JS_TAIL_LO(j)));
> + } else {
> + dev_err(pfdev->dev, "js fault, js=%d,
> status=%s, head=0x%x, tail=0x%x",
> + j, exception_name,
> + job_read(pfdev, JS_HEAD_LO(j)),
> + job_read(pfdev, JS_TAIL_LO(j)));
> + }
>
> /* If we need a reset, signal it to the timeout
> * handler, otherwise, update the fence error field and
> @@ -499,7 +506,16 @@ static void panfrost_job_handle_irq(struct
> panfrost_device *pfdev, u32 status)
> if (panfrost_exception_needs_reset(pfdev, js_status)) {
> drm_sched_fault(&pfdev->js->queue[j].sched);
> } else {
> - dma_fence_set_error(pfdev->jobs[j]->done_fence,
> -EINVAL);
> + int error = 0;
> +
> + if (js_status ==
> DRM_PANFROST_EXCEPTION_TERMINATED)
> + error = -ECANCELED;
> + else if (panfrost_exception_is_fault(js_status))
> + error = -EINVAL;
> +
> + if (error)
> +
> dma_fence_set_error(pfdev->jobs[j]->done_fence, error);
> +
> status |= JOB_INT_MASK_DONE(j);
> }
> }
> @@ -665,10 +681,24 @@ int panfrost_job_open(struct panfrost_file_priv
> *panfrost_priv)
>
> void panfrost_job_close(struct panfrost_file_priv *panfrost_priv)
> {
> + struct panfrost_device *pfdev = panfrost_priv->pfdev;
> int i;
>
> for (i = 0; i < NUM_JOB_SLOTS; i++)
> drm_sched_entity_destroy(&panfrost_priv->sched_entity[i]);
> +
> + /* Kill in-flight jobs */
> + spin_lock(&pfdev->js->job_lock);
> + for (i = 0; i < NUM_JOB_SLOTS; i++) {
> + struct drm_sched_entity *entity =
> &panfrost_priv->sched_entity[i];
> + struct panfrost_job *job = pfdev->jobs[i];
> +
> + if (!job || job->base.entity != entity)
> + continue;
> +
> + job_write(pfdev, JS_COMMAND(i), JS_COMMAND_HARD_STOP);
> + }
> + spin_unlock(&pfdev->js->job_lock);
> }
>
> int panfrost_job_is_idle(struct panfrost_device *pfdev)
>
