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path: root/drivers/firmware/arm_scmi
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Diffstat (limited to 'drivers/firmware/arm_scmi')
-rw-r--r--drivers/firmware/arm_scmi/driver.c5
-rw-r--r--drivers/firmware/arm_scmi/perf.c53
-rw-r--r--drivers/firmware/arm_scmi/powercap.c12
-rw-r--r--drivers/firmware/arm_scmi/protocols.h4
4 files changed, 64 insertions, 10 deletions
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 34d77802c990..2709598f3008 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -1624,7 +1624,7 @@ static void
scmi_common_fastchannel_init(const struct scmi_protocol_handle *ph,
u8 describe_id, u32 message_id, u32 valid_size,
u32 domain, void __iomem **p_addr,
- struct scmi_fc_db_info **p_db)
+ struct scmi_fc_db_info **p_db, u32 *rate_limit)
{
int ret;
u32 flags;
@@ -1668,6 +1668,9 @@ scmi_common_fastchannel_init(const struct scmi_protocol_handle *ph,
goto err_xfer;
}
+ if (rate_limit)
+ *rate_limit = le32_to_cpu(resp->rate_limit) & GENMASK(19, 0);
+
phys_addr = le32_to_cpu(resp->chan_addr_low);
phys_addr |= (u64)le32_to_cpu(resp->chan_addr_high) << 32;
addr = devm_ioremap(ph->dev, phys_addr, size);
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index 981e327e63e3..8e832d1ad825 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -153,6 +153,7 @@ struct perf_dom_info {
bool perf_fastchannels;
bool level_indexing_mode;
u32 opp_count;
+ u32 rate_limit_us;
u32 sustained_freq_khz;
u32 sustained_perf_level;
unsigned long mult_factor;
@@ -282,6 +283,8 @@ scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph,
if (PROTOCOL_REV_MAJOR(version) >= 0x4)
dom_info->level_indexing_mode =
SUPPORTS_LEVEL_INDEXING(flags);
+ dom_info->rate_limit_us = le32_to_cpu(attr->rate_limit_us) &
+ GENMASK(19, 0);
dom_info->sustained_freq_khz =
le32_to_cpu(attr->sustained_freq_khz);
dom_info->sustained_perf_level =
@@ -825,23 +828,27 @@ static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph,
ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
PERF_LEVEL_GET, 4, dom->id,
- &fc[PERF_FC_LEVEL].get_addr, NULL);
+ &fc[PERF_FC_LEVEL].get_addr, NULL,
+ &fc[PERF_FC_LEVEL].rate_limit);
ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
PERF_LIMITS_GET, 8, dom->id,
- &fc[PERF_FC_LIMIT].get_addr, NULL);
+ &fc[PERF_FC_LIMIT].get_addr, NULL,
+ &fc[PERF_FC_LIMIT].rate_limit);
if (dom->info.set_perf)
ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
PERF_LEVEL_SET, 4, dom->id,
&fc[PERF_FC_LEVEL].set_addr,
- &fc[PERF_FC_LEVEL].set_db);
+ &fc[PERF_FC_LEVEL].set_db,
+ &fc[PERF_FC_LEVEL].rate_limit);
if (dom->set_limits)
ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
PERF_LIMITS_SET, 8, dom->id,
&fc[PERF_FC_LIMIT].set_addr,
- &fc[PERF_FC_LIMIT].set_db);
+ &fc[PERF_FC_LIMIT].set_db,
+ &fc[PERF_FC_LIMIT].rate_limit);
dom->fc_info = fc;
}
@@ -894,6 +901,23 @@ scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph,
return dom->opp[dom->opp_count - 1].trans_latency_us * 1000;
}
+static int
+scmi_dvfs_rate_limit_get(const struct scmi_protocol_handle *ph,
+ u32 domain, u32 *rate_limit)
+{
+ struct perf_dom_info *dom;
+
+ if (!rate_limit)
+ return -EINVAL;
+
+ dom = scmi_perf_domain_lookup(ph, domain);
+ if (IS_ERR(dom))
+ return PTR_ERR(dom);
+
+ *rate_limit = dom->rate_limit_us;
+ return 0;
+}
+
static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain,
unsigned long freq, bool poll)
{
@@ -993,6 +1017,25 @@ static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph,
return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr;
}
+static int scmi_fast_switch_rate_limit(const struct scmi_protocol_handle *ph,
+ u32 domain, u32 *rate_limit)
+{
+ struct perf_dom_info *dom;
+
+ if (!rate_limit)
+ return -EINVAL;
+
+ dom = scmi_perf_domain_lookup(ph, domain);
+ if (IS_ERR(dom))
+ return PTR_ERR(dom);
+
+ if (!dom->fc_info)
+ return -EINVAL;
+
+ *rate_limit = dom->fc_info[PERF_FC_LEVEL].rate_limit;
+ return 0;
+}
+
static enum scmi_power_scale
scmi_power_scale_get(const struct scmi_protocol_handle *ph)
{
@@ -1009,11 +1052,13 @@ static const struct scmi_perf_proto_ops perf_proto_ops = {
.level_set = scmi_perf_level_set,
.level_get = scmi_perf_level_get,
.transition_latency_get = scmi_dvfs_transition_latency_get,
+ .rate_limit_get = scmi_dvfs_rate_limit_get,
.device_opps_add = scmi_dvfs_device_opps_add,
.freq_set = scmi_dvfs_freq_set,
.freq_get = scmi_dvfs_freq_get,
.est_power_get = scmi_dvfs_est_power_get,
.fast_switch_possible = scmi_fast_switch_possible,
+ .fast_switch_rate_limit = scmi_fast_switch_rate_limit,
.power_scale_get = scmi_power_scale_get,
};
diff --git a/drivers/firmware/arm_scmi/powercap.c b/drivers/firmware/arm_scmi/powercap.c
index 2fab92367e42..ea9201e7044c 100644
--- a/drivers/firmware/arm_scmi/powercap.c
+++ b/drivers/firmware/arm_scmi/powercap.c
@@ -719,20 +719,24 @@ static void scmi_powercap_domain_init_fc(const struct scmi_protocol_handle *ph,
ph->hops->fastchannel_init(ph, POWERCAP_DESCRIBE_FASTCHANNEL,
POWERCAP_CAP_SET, 4, domain,
&fc[POWERCAP_FC_CAP].set_addr,
- &fc[POWERCAP_FC_CAP].set_db);
+ &fc[POWERCAP_FC_CAP].set_db,
+ &fc[POWERCAP_FC_CAP].rate_limit);
ph->hops->fastchannel_init(ph, POWERCAP_DESCRIBE_FASTCHANNEL,
POWERCAP_CAP_GET, 4, domain,
- &fc[POWERCAP_FC_CAP].get_addr, NULL);
+ &fc[POWERCAP_FC_CAP].get_addr, NULL,
+ &fc[POWERCAP_FC_CAP].rate_limit);
ph->hops->fastchannel_init(ph, POWERCAP_DESCRIBE_FASTCHANNEL,
POWERCAP_PAI_SET, 4, domain,
&fc[POWERCAP_FC_PAI].set_addr,
- &fc[POWERCAP_FC_PAI].set_db);
+ &fc[POWERCAP_FC_PAI].set_db,
+ &fc[POWERCAP_FC_PAI].rate_limit);
ph->hops->fastchannel_init(ph, POWERCAP_DESCRIBE_FASTCHANNEL,
POWERCAP_PAI_GET, 4, domain,
- &fc[POWERCAP_FC_PAI].get_addr, NULL);
+ &fc[POWERCAP_FC_PAI].get_addr, NULL,
+ &fc[POWERCAP_PAI_GET].rate_limit);
*p_fc = fc;
}
diff --git a/drivers/firmware/arm_scmi/protocols.h b/drivers/firmware/arm_scmi/protocols.h
index 693019fff0f6..317d3fb32676 100644
--- a/drivers/firmware/arm_scmi/protocols.h
+++ b/drivers/firmware/arm_scmi/protocols.h
@@ -235,6 +235,7 @@ struct scmi_fc_info {
void __iomem *set_addr;
void __iomem *get_addr;
struct scmi_fc_db_info *set_db;
+ u32 rate_limit;
};
/**
@@ -273,7 +274,8 @@ struct scmi_proto_helpers_ops {
u8 describe_id, u32 message_id,
u32 valid_size, u32 domain,
void __iomem **p_addr,
- struct scmi_fc_db_info **p_db);
+ struct scmi_fc_db_info **p_db,
+ u32 *rate_limit);
void (*fastchannel_db_ring)(struct scmi_fc_db_info *db);
};