[PATCH v2 01/11] firmware: arm_scmi: Extend perf protocol ops to get number of domains

Ulf Hansson
2023-07-13T14:18:59Z

Similar to other protocol ops, it's useful for an scmi module driver to get
the number of supported performance domains, hence let's make this
available by adding a new perf protocol callback. Note that, a user is
being added from subsequent changes.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

Changes in v2:
- None.

---
drivers/firmware/arm_scmi/perf.c | 8 ++++++++
include/linux/scmi_protocol.h | 2 ++
2 files changed, 10 insertions(+)

diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index ecf5c4de851b..cf7f0de4d6db 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -333,6 +333,13 @@ scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph, u32 domain,
return ret;
}

+static int scmi_perf_num_domains_get(const struct scmi_protocol_handle *ph)
+{
+ struct scmi_perf_info *pi = ph->get_priv(ph);
+
+ return pi->num_domains;
+}
+
static int scmi_perf_mb_limits_set(const struct scmi_protocol_handle *ph,
u32 domain, u32 max_perf, u32 min_perf)
{
@@ -687,6 +694,7 @@ scmi_power_scale_get(const struct scmi_protocol_handle *ph)
}

static const struct scmi_perf_proto_ops perf_proto_ops = {
+ .num_domains_get = scmi_perf_num_domains_get,
.limits_set = scmi_perf_limits_set,
.limits_get = scmi_perf_limits_get,
.level_set = scmi_perf_level_set,
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index e6fe4f73ffe6..71b39cbbdace 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -101,6 +101,7 @@ struct scmi_clk_proto_ops {
* struct scmi_perf_proto_ops - represents the various operations provided
* by SCMI Performance Protocol
*
+ * @num_domains_get: gets the number of supported performance domains
* @limits_set: sets limits on the performance level of a domain
* @limits_get: gets limits on the performance level of a domain
* @level_set: sets the performance level of a domain
@@ -120,6 +121,7 @@ struct scmi_clk_proto_ops {
* or in some other (abstract) scale
*/
struct scmi_perf_proto_ops {
+ int (*num_domains_get)(const struct scmi_protocol_handle *ph);
int (*limits_set)(const struct scmi_protocol_handle *ph, u32 domain,
u32 max_perf, u32 min_perf);
int (*limits_get)(const struct scmi_protocol_handle *ph, u32 domain,
--
2.34.1