1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2024 Intel Corporation 4 */ 5 6 #include <linux/device.h> 7 #include <linux/err.h> 8 9 #include "ivpu_drv.h" 10 #include "ivpu_fw.h" 11 #include "ivpu_hw.h" 12 #include "ivpu_sysfs.h" 13 14 /* 15 * npu_busy_time_us is the time that the device spent executing jobs. 16 * The time is counted when and only when there are jobs submitted to firmware. 17 * 18 * This time can be used to measure the utilization of NPU, either by calculating 19 * npu_busy_time_us difference between two timepoints (i.e. measuring the time 20 * that the NPU was active during some workload) or monitoring utilization percentage 21 * by reading npu_busy_time_us periodically. 22 * 23 * When reading the value periodically, it shouldn't be read too often as it may have 24 * an impact on job submission performance. Recommended period is 1 second. 25 */ 26 static ssize_t 27 npu_busy_time_us_show(struct device *dev, struct device_attribute *attr, char *buf) 28 { 29 struct drm_device *drm = dev_get_drvdata(dev); 30 struct ivpu_device *vdev = to_ivpu_device(drm); 31 ktime_t total, now = 0; 32 33 xa_lock(&vdev->submitted_jobs_xa); 34 total = vdev->busy_time; 35 if (!xa_empty(&vdev->submitted_jobs_xa)) 36 now = ktime_sub(ktime_get(), vdev->busy_start_ts); 37 xa_unlock(&vdev->submitted_jobs_xa); 38 39 return sysfs_emit(buf, "%lld\n", ktime_to_us(ktime_add(total, now))); 40 } 41 42 static DEVICE_ATTR_RO(npu_busy_time_us); 43 44 /** 45 * DOC: sched_mode 46 * 47 * The sched_mode is used to report current NPU scheduling mode. 48 * 49 * It returns following strings: 50 * - "HW" - Hardware Scheduler mode 51 * - "OS" - Operating System Scheduler mode 52 * 53 */ 54 static ssize_t 55 sched_mode_show(struct device *dev, struct device_attribute *attr, char *buf) 56 { 57 struct drm_device *drm = dev_get_drvdata(dev); 58 struct ivpu_device *vdev = to_ivpu_device(drm); 59 60 return sysfs_emit(buf, "%s\n", vdev->fw->sched_mode ? "HW" : "OS"); 61 } 62 63 static DEVICE_ATTR_RO(sched_mode); 64 65 static struct attribute *ivpu_dev_attrs[] = { 66 &dev_attr_npu_busy_time_us.attr, 67 &dev_attr_sched_mode.attr, 68 NULL, 69 }; 70 71 static struct attribute_group ivpu_dev_attr_group = { 72 .attrs = ivpu_dev_attrs, 73 }; 74 75 void ivpu_sysfs_init(struct ivpu_device *vdev) 76 { 77 int ret; 78 79 ret = devm_device_add_group(vdev->drm.dev, &ivpu_dev_attr_group); 80 if (ret) 81 ivpu_warn(vdev, "Failed to add group to device, ret %d", ret); 82 } 83