Commit 6070203f authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Bjorn Andersson
Browse files

remoteproc: Introduce function __rproc_detach() 



Introduce function __rproc_detach() to perform the same kind of
operation as rproc_stop(), but instead of switching off the
remote processor using rproc->ops->stop(), it uses
rproc->ops->detach().  That way it is possible for the core
to release the resources associated with a remote processor while
the latter is kept operating.

Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: default avatarPeng Fan <peng.fan@nxp.com>
Reviewed-by: default avatarArnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20210312162453.1234145-10-mathieu.poirier@linaro.org


Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent 7f3bd0c0

drivers/remoteproc/remoteproc_core.c

+30 −0
Original line number Diff line number Diff line
@@ -1712,6 +1712,36 @@ static int rproc_stop(struct rproc *rproc, bool crashed) 
	return 0;

}



/*

 * __rproc_detach(): Does the opposite of __rproc_attach()

 */

static int __maybe_unused __rproc_detach(struct rproc *rproc)

{

	struct device *dev = &rproc->dev;

	int ret;



	/* No need to continue if a detach() operation has not been provided */

	if (!rproc->ops->detach)

		return -EINVAL;



	/* Stop any subdevices for the remote processor */

	rproc_stop_subdevices(rproc, false);



	/* Tell the remote processor the core isn't available anymore */

	ret = rproc->ops->detach(rproc);

	if (ret) {

		dev_err(dev, "can't detach from rproc: %d\n", ret);

		return ret;

	}



	rproc_unprepare_subdevices(rproc);



	rproc->state = RPROC_DETACHED;



	dev_info(dev, "detached remote processor %s\n", rproc->name);



	return 0;

}



/**

 * rproc_trigger_recovery() - recover a remoteproc