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-rw-r--r--drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h4
-rw-r--r--drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c158
2 files changed, 160 insertions, 2 deletions
diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h
index 4c245b945e4e..b5c7311bfa05 100644
--- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h
+++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.h
@@ -70,6 +70,10 @@ enum uncore_index {
UNCORE_INDEX_MIN_FREQ,
UNCORE_INDEX_MAX_FREQ,
UNCORE_INDEX_CURRENT_FREQ,
+ UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD,
+ UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD,
+ UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE,
+ UNCORE_INDEX_EFF_LAT_CTRL_FREQ,
};
int uncore_freq_common_init(int (*read)(struct uncore_data *data, unsigned int *value,
diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
index 6c2e607968f2..0591053813a2 100644
--- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
+++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
@@ -30,6 +30,7 @@
#define UNCORE_MAJOR_VERSION 0
#define UNCORE_MINOR_VERSION 2
+#define UNCORE_ELC_SUPPORTED_VERSION 2
#define UNCORE_HEADER_INDEX 0
#define UNCORE_FABRIC_CLUSTER_OFFSET 8
@@ -46,6 +47,7 @@ struct tpmi_uncore_struct;
/* Information for each cluster */
struct tpmi_uncore_cluster_info {
bool root_domain;
+ bool elc_supported;
u8 __iomem *cluster_base;
struct uncore_data uncore_data;
struct tpmi_uncore_struct *uncore_root;
@@ -75,6 +77,10 @@ struct tpmi_uncore_struct {
/* Bit definitions for CONTROL register */
#define UNCORE_MAX_RATIO_MASK GENMASK_ULL(14, 8)
#define UNCORE_MIN_RATIO_MASK GENMASK_ULL(21, 15)
+#define UNCORE_EFF_LAT_CTRL_RATIO_MASK GENMASK_ULL(28, 22)
+#define UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK GENMASK_ULL(38, 32)
+#define UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE BIT(39)
+#define UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK GENMASK_ULL(46, 40)
/* Helper function to read MMIO offset for max/min control frequency */
static void read_control_freq(struct tpmi_uncore_cluster_info *cluster_info,
@@ -89,6 +95,48 @@ static void read_control_freq(struct tpmi_uncore_cluster_info *cluster_info,
*value = FIELD_GET(UNCORE_MIN_RATIO_MASK, control) * UNCORE_FREQ_KHZ_MULTIPLIER;
}
+/* Helper function to read efficiency latency control values over MMIO */
+static int read_eff_lat_ctrl(struct uncore_data *data, unsigned int *val, enum uncore_index index)
+{
+ struct tpmi_uncore_cluster_info *cluster_info;
+ u64 ctrl;
+
+ cluster_info = container_of(data, struct tpmi_uncore_cluster_info, uncore_data);
+ if (cluster_info->root_domain)
+ return -ENODATA;
+
+ if (!cluster_info->elc_supported)
+ return -EOPNOTSUPP;
+
+ ctrl = readq(cluster_info->cluster_base + UNCORE_CONTROL_INDEX);
+
+ switch (index) {
+ case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+ *val = FIELD_GET(UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK, ctrl);
+ *val *= 100;
+ *val = DIV_ROUND_UP(*val, FIELD_MAX(UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK));
+ break;
+
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+ *val = FIELD_GET(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK, ctrl);
+ *val *= 100;
+ *val = DIV_ROUND_UP(*val, FIELD_MAX(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK));
+ break;
+
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+ *val = FIELD_GET(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE, ctrl);
+ break;
+ case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+ *val = FIELD_GET(UNCORE_EFF_LAT_CTRL_RATIO_MASK, ctrl) * UNCORE_FREQ_KHZ_MULTIPLIER;
+ break;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
#define UNCORE_MAX_RATIO FIELD_MAX(UNCORE_MAX_RATIO_MASK)
/* Helper for sysfs read for max/min frequencies. Called under mutex locks */
@@ -137,6 +185,82 @@ static int uncore_read_control_freq(struct uncore_data *data, unsigned int *valu
return 0;
}
+/* Helper function for writing efficiency latency control values over MMIO */
+static int write_eff_lat_ctrl(struct uncore_data *data, unsigned int val, enum uncore_index index)
+{
+ struct tpmi_uncore_cluster_info *cluster_info;
+ u64 control;
+
+ cluster_info = container_of(data, struct tpmi_uncore_cluster_info, uncore_data);
+
+ if (cluster_info->root_domain)
+ return -ENODATA;
+
+ if (!cluster_info->elc_supported)
+ return -EOPNOTSUPP;
+
+ switch (index) {
+ case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+ if (val > 100)
+ return -EINVAL;
+ break;
+
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+ if (val > 100)
+ return -EINVAL;
+ break;
+
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+ if (val > 1)
+ return -EINVAL;
+ break;
+
+ case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+ val /= UNCORE_FREQ_KHZ_MULTIPLIER;
+ if (val > FIELD_MAX(UNCORE_EFF_LAT_CTRL_RATIO_MASK))
+ return -EINVAL;
+ break;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ control = readq(cluster_info->cluster_base + UNCORE_CONTROL_INDEX);
+
+ switch (index) {
+ case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+ val *= FIELD_MAX(UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK);
+ val /= 100;
+ control &= ~UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK;
+ control |= FIELD_PREP(UNCORE_EFF_LAT_CTRL_LOW_THRESHOLD_MASK, val);
+ break;
+
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+ val *= FIELD_MAX(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK);
+ val /= 100;
+ control &= ~UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK;
+ control |= FIELD_PREP(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_MASK, val);
+ break;
+
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+ control &= ~UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE;
+ control |= FIELD_PREP(UNCORE_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE, val);
+ break;
+
+ case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+ control &= ~UNCORE_EFF_LAT_CTRL_RATIO_MASK;
+ control |= FIELD_PREP(UNCORE_EFF_LAT_CTRL_RATIO_MASK, val);
+ break;
+
+ default:
+ break;
+ }
+
+ writeq(control, cluster_info->cluster_base + UNCORE_CONTROL_INDEX);
+
+ return 0;
+}
+
/* Helper function to write MMIO offset for max/min control frequency */
static void write_control_freq(struct tpmi_uncore_cluster_info *cluster_info, unsigned int input,
unsigned int index)
@@ -156,7 +280,7 @@ static void write_control_freq(struct tpmi_uncore_cluster_info *cluster_info, un
writeq(control, (cluster_info->cluster_base + UNCORE_CONTROL_INDEX));
}
-/* Callback for sysfs write for max/min frequencies. Called under mutex locks */
+/* Helper for sysfs write for max/min frequencies. Called under mutex locks */
static int uncore_write_control_freq(struct uncore_data *data, unsigned int input,
enum uncore_index index)
{
@@ -234,6 +358,33 @@ static int uncore_read(struct uncore_data *data, unsigned int *value, enum uncor
case UNCORE_INDEX_CURRENT_FREQ:
return uncore_read_freq(data, value);
+ case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+ case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+ return read_eff_lat_ctrl(data, value, index);
+
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+/* Callback for sysfs write for TPMI uncore data. Called under mutex locks. */
+static int uncore_write(struct uncore_data *data, unsigned int value, enum uncore_index index)
+{
+ switch (index) {
+ case UNCORE_INDEX_EFF_LAT_CTRL_LOW_THRESHOLD:
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD:
+ case UNCORE_INDEX_EFF_LAT_CTRL_HIGH_THRESHOLD_ENABLE:
+ case UNCORE_INDEX_EFF_LAT_CTRL_FREQ:
+ return write_eff_lat_ctrl(data, value, index);
+
+ case UNCORE_INDEX_MIN_FREQ:
+ case UNCORE_INDEX_MAX_FREQ:
+ return uncore_write_control_freq(data, value, index);
+
default:
break;
}
@@ -291,7 +442,7 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_
return -EINVAL;
/* Register callbacks to uncore core */
- ret = uncore_freq_common_init(uncore_read, uncore_write_control_freq);
+ ret = uncore_freq_common_init(uncore_read, uncore_write);
if (ret)
return ret;
@@ -409,6 +560,9 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_
cluster_info->uncore_root = tpmi_uncore;
+ if (TPMI_MINOR_VERSION(pd_info->ufs_header_ver) >= UNCORE_ELC_SUPPORTED_VERSION)
+ cluster_info->elc_supported = true;
+
ret = uncore_freq_add_entry(&cluster_info->uncore_data, 0);
if (ret) {
cluster_info->cluster_base = NULL;
generated by cgit (git 2.34.1) at 2025-07-23 14:32:09 +0000