[PATCH 21/22] firmware: arm_scmi: Add SCMI v3.1 Perf power-cost in microwatts

Cristian Marussi
2022-03-30T15:20:42Z

Add SCMIv3.1 internal support for parsing message attributes reporting
the capability of a performance domain to report power-cost in microwatts.

Cc: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
drivers/firmware/arm_scmi/perf.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index e1aa0ed67971..65ffda5495d6 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -45,6 +45,7 @@ struct scmi_msg_resp_perf_attributes {
__le16 num_domains;
__le16 flags;
#define POWER_SCALE_IN_MILLIWATT(x) ((x) & BIT(0))
+#define POWER_SCALE_IN_MICROWATT(x) ((x) & BIT(1))
__le32 stats_addr_low;
__le32 stats_addr_high;
__le32 stats_size;
@@ -170,6 +171,7 @@ struct scmi_perf_info {
u32 version;
int num_domains;
bool power_scale_mw;
+ bool power_scale_uw;
u64 stats_addr;
u32 stats_size;
struct perf_dom_info *dom_info;
@@ -200,6 +202,8 @@ static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph,

pi->num_domains = le16_to_cpu(attr->num_domains);
pi->power_scale_mw = POWER_SCALE_IN_MILLIWATT(flags);
+ if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3)
+ pi->power_scale_uw = POWER_SCALE_IN_MICROWATT(flags);
pi->stats_addr = le32_to_cpu(attr->stats_addr_low) |
(u64)le32_to_cpu(attr->stats_addr_high) << 32;
pi->stats_size = le32_to_cpu(attr->stats_size);
--
2.32.0