1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2024 Intel Corporation
6 #include <linux/device.h>
13 #include "ivpu_sysfs.h"
16 * DOC: npu_busy_time_us
18 * npu_busy_time_us is the time that the device spent executing jobs.
19 * The time is counted when and only when there are jobs submitted to firmware.
21 * This time can be used to measure the utilization of NPU, either by calculating
22 * npu_busy_time_us difference between two timepoints (i.e. measuring the time
23 * that the NPU was active during some workload) or monitoring utilization percentage
24 * by reading npu_busy_time_us periodically.
26 * When reading the value periodically, it shouldn't be read too often as it may have
27 * an impact on job submission performance. Recommended period is 1 second.
30 npu_busy_time_us_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
32 struct drm_device
*drm
= dev_get_drvdata(dev
);
33 struct ivpu_device
*vdev
= to_ivpu_device(drm
);
34 ktime_t total
, now
= 0;
36 mutex_lock(&vdev
->submitted_jobs_lock
);
38 total
= vdev
->busy_time
;
39 if (!xa_empty(&vdev
->submitted_jobs_xa
))
40 now
= ktime_sub(ktime_get(), vdev
->busy_start_ts
);
41 mutex_unlock(&vdev
->submitted_jobs_lock
);
43 return sysfs_emit(buf
, "%lld\n", ktime_to_us(ktime_add(total
, now
)));
46 static DEVICE_ATTR_RO(npu_busy_time_us
);
49 * DOC: npu_memory_utilization
51 * The npu_memory_utilization is used to report in bytes a current NPU memory utilization.
55 npu_memory_utilization_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
57 struct drm_device
*drm
= dev_get_drvdata(dev
);
58 struct ivpu_device
*vdev
= to_ivpu_device(drm
);
60 u64 total_npu_memory
= 0;
62 mutex_lock(&vdev
->bo_list_lock
);
63 list_for_each_entry(bo
, &vdev
->bo_list
, bo_list_node
)
64 total_npu_memory
+= bo
->base
.base
.size
;
65 mutex_unlock(&vdev
->bo_list_lock
);
67 return sysfs_emit(buf
, "%lld\n", total_npu_memory
);
70 static DEVICE_ATTR_RO(npu_memory_utilization
);
75 * The sched_mode is used to report current NPU scheduling mode.
77 * It returns following strings:
78 * - "HW" - Hardware Scheduler mode
79 * - "OS" - Operating System Scheduler mode
83 sched_mode_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
85 struct drm_device
*drm
= dev_get_drvdata(dev
);
86 struct ivpu_device
*vdev
= to_ivpu_device(drm
);
88 return sysfs_emit(buf
, "%s\n", vdev
->fw
->sched_mode
? "HW" : "OS");
91 static DEVICE_ATTR_RO(sched_mode
);
93 static struct attribute
*ivpu_dev_attrs
[] = {
94 &dev_attr_npu_busy_time_us
.attr
,
95 &dev_attr_npu_memory_utilization
.attr
,
96 &dev_attr_sched_mode
.attr
,
100 static struct attribute_group ivpu_dev_attr_group
= {
101 .attrs
= ivpu_dev_attrs
,
104 void ivpu_sysfs_init(struct ivpu_device
*vdev
)
108 ret
= devm_device_add_group(vdev
->drm
.dev
, &ivpu_dev_attr_group
);
110 ivpu_warn(vdev
, "Failed to add group to device, ret %d", ret
);