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Date: Mon, 13 Sep 2021 22:39:25 +0300
From: Oded Gabbay <ogabbay@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Rajaravi Krishna Katta <rkatta@...ana.ai>
Subject: [PATCH 2/3] habanalabs: enable power info via HWMON framework
From: Rajaravi Krishna Katta <rkatta@...ana.ai>
Add support to retrieve following power info via HWMON:
- instantaneous power value
- highest value since last reset
- reset the highest place holder
Signed-off-by: Rajaravi Krishna Katta <rkatta@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
drivers/misc/habanalabs/common/habanalabs.h | 4 +
drivers/misc/habanalabs/common/hwmon.c | 94 +++++++++++++++++++
.../misc/habanalabs/include/common/cpucp_if.h | 10 ++
3 files changed, 108 insertions(+)
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index bebebcb163ee..f8e23ca18a57 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -2956,6 +2956,10 @@ int hl_set_voltage(struct hl_device *hdev,
int sensor_index, u32 attr, long value);
int hl_set_current(struct hl_device *hdev,
int sensor_index, u32 attr, long value);
+int hl_set_power(struct hl_device *hdev,
+ int sensor_index, u32 attr, long value);
+int hl_get_power(struct hl_device *hdev,
+ int sensor_index, u32 attr, long *value);
void hw_sob_get(struct hl_hw_sob *hw_sob);
void hw_sob_put(struct hl_hw_sob *hw_sob);
void hl_encaps_handle_do_release(struct kref *ref);
diff --git a/drivers/misc/habanalabs/common/hwmon.c b/drivers/misc/habanalabs/common/hwmon.c
index 8f12d99fda09..e33f65be8a00 100644
--- a/drivers/misc/habanalabs/common/hwmon.c
+++ b/drivers/misc/habanalabs/common/hwmon.c
@@ -236,6 +236,23 @@ static int hl_read(struct device *dev, enum hwmon_sensor_types type,
else
rc = hl_get_pwm_info(hdev, channel, attr, val);
break;
+ case hwmon_power:
+ switch (attr) {
+ case hwmon_power_input:
+ cpucp_attr = CPUCP_POWER_INPUT;
+ break;
+ case hwmon_power_input_highest:
+ cpucp_attr = CPUCP_POWER_INPUT_HIGHEST;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (use_cpucp_enum)
+ rc = hl_get_power(hdev, channel, cpucp_attr, val);
+ else
+ rc = hl_get_power(hdev, channel, attr, val);
+ break;
default:
return -EINVAL;
}
@@ -316,6 +333,20 @@ static int hl_write(struct device *dev, enum hwmon_sensor_types type,
else
hl_set_current(hdev, channel, attr, val);
break;
+ case hwmon_power:
+ switch (attr) {
+ case hwmon_power_reset_history:
+ cpucp_attr = CPUCP_POWER_RESET_INPUT_HISTORY;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (use_cpucp_enum)
+ hl_set_power(hdev, channel, cpucp_attr, val);
+ else
+ hl_set_power(hdev, channel, attr, val);
+ break;
default:
return -EINVAL;
}
@@ -378,6 +409,15 @@ static umode_t hl_is_visible(const void *data, enum hwmon_sensor_types type,
return 0644;
}
break;
+ case hwmon_power:
+ switch (attr) {
+ case hwmon_power_input:
+ case hwmon_power_input_highest:
+ return 0444;
+ case hwmon_power_reset_history:
+ return 0200;
+ }
+ break;
default:
break;
}
@@ -633,6 +673,60 @@ int hl_set_current(struct hl_device *hdev,
return rc;
}
+int hl_set_power(struct hl_device *hdev,
+ int sensor_index, u32 attr, long value)
+{
+ struct cpucp_packet pkt;
+ int rc;
+
+ memset(&pkt, 0, sizeof(pkt));
+
+ pkt.ctl = cpu_to_le32(CPUCP_PACKET_POWER_GET <<
+ CPUCP_PKT_CTL_OPCODE_SHIFT);
+ pkt.sensor_index = __cpu_to_le16(sensor_index);
+ pkt.type = __cpu_to_le16(attr);
+ pkt.value = __cpu_to_le64(value);
+
+ rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
+ 0, NULL);
+
+ if (rc)
+ dev_err(hdev->dev,
+ "Failed to set power of sensor %d, error %d\n",
+ sensor_index, rc);
+
+ return rc;
+}
+
+int hl_get_power(struct hl_device *hdev,
+ int sensor_index, u32 attr, long *value)
+{
+ struct cpucp_packet pkt;
+ u64 result;
+ int rc;
+
+ memset(&pkt, 0, sizeof(pkt));
+
+ pkt.ctl = cpu_to_le32(CPUCP_PACKET_POWER_GET <<
+ CPUCP_PKT_CTL_OPCODE_SHIFT);
+ pkt.sensor_index = __cpu_to_le16(sensor_index);
+ pkt.type = __cpu_to_le16(attr);
+
+ rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
+ 0, &result);
+
+ *value = (long) result;
+
+ if (rc) {
+ dev_err(hdev->dev,
+ "Failed to get power of sensor %d, error %d\n",
+ sensor_index, rc);
+ *value = 0;
+ }
+
+ return rc;
+}
+
int hl_hwmon_init(struct hl_device *hdev)
{
struct device *dev = hdev->pdev ? &hdev->pdev->dev : hdev->dev;
diff --git a/drivers/misc/habanalabs/include/common/cpucp_if.h b/drivers/misc/habanalabs/include/common/cpucp_if.h
index 9ff6a448f0d4..a6fa1cfa38a5 100644
--- a/drivers/misc/habanalabs/include/common/cpucp_if.h
+++ b/drivers/misc/habanalabs/include/common/cpucp_if.h
@@ -598,6 +598,16 @@ enum cpucp_pll_type_attributes {
cpucp_pll_pci,
};
+/*
+ * cpucp_power_type aligns with hwmon_power_attributes
+ * defined in Linux kernel hwmon.h file
+ */
+enum cpucp_power_type {
+ CPUCP_POWER_INPUT = 8,
+ CPUCP_POWER_INPUT_HIGHEST = 9,
+ CPUCP_POWER_RESET_INPUT_HISTORY = 11
+};
+
/*
* MSI type enumeration table for all ASICs and future SW versions.
* For future ASIC-LKD compatibility, we can only add new enumerations.
--
2.17.1
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