On Fri, Jun 20, 2025 at 12:57:28PM -0700, Tanmay Shah wrote:
> In case of kexec call, each driver's shutdown callback is called. Handle
> this call for rproc driver and shutdown/detach each core that was powered
> on before. This is needed for proper Life Cycle Management of remote
> processor. Otherwise on next linux boot, remote processor can't be
> started due to bad refcount of power-domain managed by platform
> management controller.
>
> Signed-off-by: Tanmay Shah <tanmay.s...@amd.com>
> ---
> drivers/remoteproc/xlnx_r5_remoteproc.c | 40 +++++++++++++++++++++++++
> 1 file changed, 40 insertions(+)
>
I have applied your patch.
Thanks,
Mathieu
> diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c
> b/drivers/remoteproc/xlnx_r5_remoteproc.c
> index 1af89782e116..30294e7fbc79 100644
> --- a/drivers/remoteproc/xlnx_r5_remoteproc.c
> +++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
> @@ -1463,6 +1463,45 @@ static void zynqmp_r5_cluster_exit(void *data)
> platform_set_drvdata(pdev, NULL);
> }
>
> +/*
> + * zynqmp_r5_remoteproc_shutdown()
> + * Follow shutdown sequence in case of kexec call.
> + *
> + * @pdev: domain platform device for cluster
> + *
> + * Return: None.
> + */
> +static void zynqmp_r5_remoteproc_shutdown(struct platform_device *pdev)
> +{
> + const char *rproc_state_str = NULL;
> + struct zynqmp_r5_cluster *cluster;
> + struct zynqmp_r5_core *r5_core;
> + struct rproc *rproc;
> + int i, ret = 0;
> +
> + cluster = platform_get_drvdata(pdev);
> +
> + for (i = 0; i < cluster->core_count; i++) {
> + r5_core = cluster->r5_cores[i];
> + rproc = r5_core->rproc;
> +
> + if (rproc->state == RPROC_RUNNING) {
> + ret = rproc_shutdown(rproc);
> + rproc_state_str = "shutdown";
> + } else if (rproc->state == RPROC_ATTACHED) {
> + ret = rproc_detach(rproc);
> + rproc_state_str = "detach";
> + } else {
> + ret = 0;
> + }
> +
> + if (ret) {
> + dev_err(cluster->dev, "failed to %s rproc %d\n",
> + rproc_state_str, rproc->index);
> + }
> + }
> +}
> +
> /*
> * zynqmp_r5_remoteproc_probe()
> * parse device-tree, initialize hardware and allocate required resources
> @@ -1524,6 +1563,7 @@ static struct platform_driver
> zynqmp_r5_remoteproc_driver = {
> .name = "zynqmp_r5_remoteproc",
> .of_match_table = zynqmp_r5_remoteproc_match,
> },
> + .shutdown = zynqmp_r5_remoteproc_shutdown,
> };
> module_platform_driver(zynqmp_r5_remoteproc_driver);
>
>
> base-commit: d293da1e4dbebb40560e4c6a417b29ce3393659a
> --
> 2.34.1
>
