On Sun, Jan 4, 2015 at 2:53 PM, Oded Gabbay <oded.gabbay@xxxxxxx> wrote:
> From: Ben Goz <ben.goz@xxxxxxx>
>
> This patch fixes a bug in DQM, where the MQD of a newly created compute queue
> is not loaded to an HQD slot. As a result, the CP never reads packets from this
> queue.
>
> This bug happens only in non-HWS (hardware scheduling) mode. In HWS mode, the
> CP is responsible of loading MQDs to HQDs slots.
>
> Signed-off-by: Ben Goz <ben.goz@xxxxxxx>
> Reviewed-by: Oded Gabbay <oded.gabbay@xxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> index f44d673..3b08ed6 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> @@ -272,6 +272,18 @@ static int create_compute_queue_nocpsch(struct device_queue_manager *dqm,
> return retval;
> }
>
> + pr_debug("kfd: loading mqd to hqd on pipe (%d) queue (%d)\n",
> + q->pipe,
> + q->queue);
> +
> + retval = mqd->load_mqd(mqd, q->mqd, q->pipe,
> + q->queue, q->properties.write_ptr);
> + if (retval != 0) {
> + deallocate_hqd(dqm, q);
> + mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj);
> + return retval;
> + }
> +
> return 0;
> }
>
> --
> 2.1.0
>
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