Hi Peng,
On Wed, Mar 23, 2022 at 11:44:04AM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
>
> remote processor may support:
> - firmware recovery with help from main processor
> - self recovery without help from main processor
> - iommu
> - etc
>
> Introduce rproc features could simplify code to avoid adding more bool
> flags
>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> ---
> drivers/remoteproc/remoteproc_internal.h | 10 ++++++++++
> include/linux/remoteproc.h | 7 +++++++
> 2 files changed, 17 insertions(+)
>
> diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
> index 72d4d3d7d94d..e9ae743c5587 100644
> --- a/drivers/remoteproc/remoteproc_internal.h
> +++ b/drivers/remoteproc/remoteproc_internal.h
> @@ -24,6 +24,16 @@ struct rproc_debug_trace {
> struct rproc_mem_entry trace_mem;
> };
>
> +static inline bool rproc_has_feature(struct rproc *rproc, unsigned int feature)
> +{
> + return test_bit(feature, rproc->features);
> +}
> +
> +static inline void rproc_set_feature(struct rproc *rproc, unsigned int feature)
> +{
I would expect this function to return -EINVAL if feature is >
RPROC_MAX_FEATURES.
> + set_bit(feature, rproc->features);
> +}
> +
> /* from remoteproc_core.c */
> void rproc_release(struct kref *kref);
> irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index 7c943f0a2fc4..7847c6b10a69 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -489,6 +489,11 @@ struct rproc_dump_segment {
> loff_t offset;
> };
>
Please add proper kernel documentation.
> +enum rproc_features {
> + RPROC_FEAT_ATTACH_RECOVERY,
s/RPROC_FEAT_ATTACH_RECOVERY/RPROC_FEAT_ATTACH_ON_RECOVERY
> + RPROC_MAX_FEATURES,
> +};
> +
> /**
> * struct rproc - represents a physical remote processor device
> * @node: list node of this rproc object
> @@ -530,6 +535,7 @@ struct rproc_dump_segment {
> * @elf_machine: firmware ELF machine
> * @cdev: character device of the rproc
> * @cdev_put_on_release: flag to indicate if remoteproc should be shutdown on @char_dev release
> + * @features: indicate remoteproc features
> */
> struct rproc {
> struct list_head node;
> @@ -570,6 +576,7 @@ struct rproc {
> u16 elf_machine;
> struct cdev cdev;
> bool cdev_put_on_release;
> + DECLARE_BITMAP(features, RPROC_MAX_FEATURES);
> };
>
> /**
> --
> 2.25.1
>
