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remoteproc: Introduce subdevices

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A subdevice is an abstract entity that can be used to tie actions to the
booting and shutting down of a remote processor. The subdevice object is
expected to be embedded in concrete implementations, allowing for a
variety of use cases to be implemented.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Bjorn Andersson 2016-10-19 19:40:02 -07:00
parent 1d701d3dd8
commit 7bdc9650f0
2 changed files with 94 additions and 0 deletions
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22
include/linux/remoteproc.h
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@ -400,6 +400,7 @@ enum rproc_crash_type {
* @firmware_loading_complete: marks e/o asynchronous firmware loading
* @bootaddr: address of first instruction to boot rproc with (optional)
* @rvdevs: list of remote virtio devices
* @subdevs: list of subdevices, to following the running state
* @notifyids: idr for dynamically assigning rproc-wide unique notify ids
* @index: index of this rproc device
* @crash_handler: workqueue for handling a crash
@ -431,6 +432,7 @@ struct rproc {
struct completion firmware_loading_complete;
u32 bootaddr;
struct list_head rvdevs;
struct list_head subdevs;
struct idr notifyids;
int index;
struct work_struct crash_handler;
@ -444,6 +446,19 @@ struct rproc {
bool auto_boot;
};
/**
* struct rproc_subdev - subdevice tied to a remoteproc
* @node: list node related to the rproc subdevs list
* @probe: probe function, called as the rproc is started
* @remove: remove function, called as the rproc is stopped
*/
struct rproc_subdev {
struct list_head node;
int (*probe)(struct rproc_subdev *subdev);
void (*remove)(struct rproc_subdev *subdev);
};
/* we currently support only two vrings per rvdev */
#define RVDEV_NUM_VRINGS 2
@ -511,4 +526,11 @@ static inline struct rproc *vdev_to_rproc(struct virtio_device *vdev)
return rvdev->rproc;
}
void rproc_add_subdev(struct rproc *rproc,
struct rproc_subdev *subdev,
int (*probe)(struct rproc_subdev *subdev),
void (*remove)(struct rproc_subdev *subdev));
void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev);
#endif /* REMOTEPROC_H */