accel/habanalabs: add HL_GET_P_STATE passthrough type

Add a new passthrough type HL_GET_P_STATE to the cpucp generic ioctl
to allow userspace to read the device performance state via firmware.

Signed-off-by: Ariel Aviad <[email protected]>
Reviewed-by: Koby Elbaz <[email protected]>
Signed-off-by: Koby Elbaz <[email protected]>

Author: aaviadai

drivers/accel/habanalabs/common/habanalabs_ioctl.c

@@ -964,6 +964,9 @@ static int send_fw_generic_request(struct hl_device *hdev, struct hl_info_args *
 	case  HL_GET_ERR_COUNTERS_CMD:
 		need_input_buff = true;
 		break;
+	case HL_GET_P_STATE:
+		need_input_buff = false;
+		break;
 	default:
 		return -EINVAL;
 	}

include/linux/habanalabs/cpucp_if.h

@@ -1426,10 +1426,12 @@ struct cpucp_monitor_dump {
  *
  * HL_PASSTHROUGHT_VERSIONS	- Fetch all firmware versions.
  * HL_GET_ERR_COUNTERS_CMD	- Command to get error counters
+ * HL_GET_P_STATE		- get performance state
  */
 enum hl_passthrough_type {
 	HL_PASSTHROUGH_VERSIONS,
 	HL_GET_ERR_COUNTERS_CMD,
+	HL_GET_P_STATE,
 };
 
 #endif /* CPUCP_IF_H */