Commit a6a4f285 authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Bjorn Andersson
Browse files

remoteproc: Add new attach() remoteproc operation 



Add an new attach() operation in order to properly deal with
scenarios where the remoteproc core needs to attach to a
remote processor that has been booted by another entity.

Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: default avatarArnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20200714195035.1426873-3-mathieu.poirier@linaro.org


Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent e2e5c55e

drivers/remoteproc/remoteproc_internal.h

+8 −0
Original line number Diff line number Diff line
@@ -79,6 +79,14 @@ static inline int rproc_unprepare_device(struct rproc *rproc) 
	return 0;

}



static inline int rproc_attach_device(struct rproc *rproc)

{

	if (rproc->ops->attach)

		return rproc->ops->attach(rproc);



	return 0;

}



static inline

int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)

{

include/linux/remoteproc.h

+2 −0
Original line number Diff line number Diff line
@@ -359,6 +359,7 @@ enum rsc_handling_status { 
 * @unprepare:	unprepare device after stop

 * @start:	power on the device and boot it

 * @stop:	power off the device

 * @attach:	attach to a device that his already powered up

 * @kick:	kick a virtqueue (virtqueue id given as a parameter)

 * @da_to_va:	optional platform hook to perform address translations

 * @parse_fw:	parse firmware to extract information (e.g. resource table)
@@ -379,6 +380,7 @@ struct rproc_ops { 
	int (*unprepare)(struct rproc *rproc);

	int (*start)(struct rproc *rproc);

	int (*stop)(struct rproc *rproc);

	int (*attach)(struct rproc *rproc);

	void (*kick)(struct rproc *rproc, int vqid);

	void * (*da_to_va)(struct rproc *rproc, u64 da, size_t len);

	int (*parse_fw)(struct rproc *rproc, const struct firmware *fw);

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