From: Andrzej Kacprowski <andrzej.kacprow...@intel.com>
Add sysfs files that show maximum and current
frequency of the NPU's data processing unit.
New sysfs entries:
- npu_max_frequency_mhz
- npu_current_frequency_mhz
Signed-off-by: Andrzej Kacprowski <andrzej.kacprow...@intel.com>
Signed-off-by: Maciej Falkowski <maciej.falkow...@linux.intel.com>
---
drivers/accel/ivpu/ivpu_hw.h | 5 ++++
drivers/accel/ivpu/ivpu_hw_btrs.c | 8 +++++
drivers/accel/ivpu/ivpu_hw_btrs.h | 1 +
drivers/accel/ivpu/ivpu_sysfs.c | 49 ++++++++++++++++++++++++++++++-
4 files changed, 62 insertions(+), 1 deletion(-)
diff --git a/drivers/accel/ivpu/ivpu_hw.h b/drivers/accel/ivpu/ivpu_hw.h
index 6e67e736ef8e..d79668fe1609 100644
--- a/drivers/accel/ivpu/ivpu_hw.h
+++ b/drivers/accel/ivpu/ivpu_hw.h
@@ -87,6 +87,11 @@ static inline u32 ivpu_hw_dpu_max_freq_get(struct
ivpu_device *vdev)
return ivpu_hw_btrs_dpu_max_freq_get(vdev);
}
+static inline u32 ivpu_hw_dpu_freq_get(struct ivpu_device *vdev)
+{
+ return ivpu_hw_btrs_dpu_freq_get(vdev);
+}
+
static inline void ivpu_hw_irq_clear(struct ivpu_device *vdev)
{
ivpu_hw_ip_irq_clear(vdev);
diff --git a/drivers/accel/ivpu/ivpu_hw_btrs.c
b/drivers/accel/ivpu/ivpu_hw_btrs.c
index 91eb8a93c15b..b236c7234daa 100644
--- a/drivers/accel/ivpu/ivpu_hw_btrs.c
+++ b/drivers/accel/ivpu/ivpu_hw_btrs.c
@@ -606,6 +606,14 @@ u32 ivpu_hw_btrs_dpu_max_freq_get(struct ivpu_device *vdev)
return pll_ratio_to_dpu_freq(vdev, vdev->hw->pll.max_ratio);
}
+u32 ivpu_hw_btrs_dpu_freq_get(struct ivpu_device *vdev)
+{
+ if (ivpu_hw_btrs_gen(vdev) == IVPU_HW_BTRS_MTL)
+ return pll_ratio_to_dpu_freq_mtl(pll_config_get_mtl(vdev));
+ else
+ return pll_ratio_to_dpu_freq_lnl(pll_config_get_lnl(vdev));
+}
+
/* Handler for IRQs from Buttress core (irqB) */
bool ivpu_hw_btrs_irq_handler_mtl(struct ivpu_device *vdev, int irq)
{
diff --git a/drivers/accel/ivpu/ivpu_hw_btrs.h
b/drivers/accel/ivpu/ivpu_hw_btrs.h
index a2f0877237e8..300f749971d4 100644
--- a/drivers/accel/ivpu/ivpu_hw_btrs.h
+++ b/drivers/accel/ivpu/ivpu_hw_btrs.h
@@ -32,6 +32,7 @@ void ivpu_hw_btrs_profiling_freq_reg_set_lnl(struct
ivpu_device *vdev);
void ivpu_hw_btrs_ats_print_lnl(struct ivpu_device *vdev);
void ivpu_hw_btrs_clock_relinquish_disable_lnl(struct ivpu_device *vdev);
u32 ivpu_hw_btrs_dpu_max_freq_get(struct ivpu_device *vdev);
+u32 ivpu_hw_btrs_dpu_freq_get(struct ivpu_device *vdev);
bool ivpu_hw_btrs_irq_handler_mtl(struct ivpu_device *vdev, int irq);
bool ivpu_hw_btrs_irq_handler_lnl(struct ivpu_device *vdev, int irq);
int ivpu_hw_btrs_dct_get_request(struct ivpu_device *vdev, bool *enable);
diff --git a/drivers/accel/ivpu/ivpu_sysfs.c b/drivers/accel/ivpu/ivpu_sysfs.c
index 97102feaf8dd..268ab7744a8b 100644
--- a/drivers/accel/ivpu/ivpu_sysfs.c
+++ b/drivers/accel/ivpu/ivpu_sysfs.c
@@ -1,10 +1,12 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Copyright (C) 2024 Intel Corporation
+ * Copyright (C) 2024-2025 Intel Corporation
*/
#include <linux/device.h>
#include <linux/err.h>
+#include <linux/pm_runtime.h>
+#include <linux/units.h>
#include "ivpu_drv.h"
#include "ivpu_gem.h"
@@ -90,10 +92,55 @@ sched_mode_show(struct device *dev, struct device_attribute
*attr, char *buf)
static DEVICE_ATTR_RO(sched_mode);
+/**
+ * DOC: npu_max_frequency
+ *
+ * The npu_max_frequency shows maximum frequency in MHz of the NPU's data
+ * processing unit
+ */
+static ssize_t
+npu_max_frequency_mhz_show(struct device *dev, struct device_attribute *attr,
char *buf)
+{
+ struct drm_device *drm = dev_get_drvdata(dev);
+ struct ivpu_device *vdev = to_ivpu_device(drm);
+ u32 freq = ivpu_hw_dpu_max_freq_get(vdev);
+
+ return sysfs_emit(buf, "%lu\n", freq / HZ_PER_MHZ);
+}
+
+static DEVICE_ATTR_RO(npu_max_frequency_mhz);
+
+/**
+ * DOC: npu_current_frequency_mhz
+ *
+ * The npu_current_frequency_mhz shows current frequency in MHz of the NPU's
+ * data processing unit
+ */
+static ssize_t
+npu_current_frequency_mhz_show(struct device *dev, struct device_attribute
*attr, char *buf)
+{
+ struct drm_device *drm = dev_get_drvdata(dev);
+ struct ivpu_device *vdev = to_ivpu_device(drm);
+ u32 freq = 0;
+
+ /* Read frequency only if device is active, otherwise frequency is 0 */
+ if (pm_runtime_get_if_active(vdev->drm.dev) > 0) {
+ freq = ivpu_hw_dpu_freq_get(vdev);
+
+ pm_runtime_put_autosuspend(vdev->drm.dev);
+ }
+
+ return sysfs_emit(buf, "%lu\n", freq / HZ_PER_MHZ);
+}
+
+static DEVICE_ATTR_RO(npu_current_frequency_mhz);
+
static struct attribute *ivpu_dev_attrs[] = {
&dev_attr_npu_busy_time_us.attr,
&dev_attr_npu_memory_utilization.attr,
&dev_attr_sched_mode.attr,
+ &dev_attr_npu_max_frequency_mhz.attr,
+ &dev_attr_npu_current_frequency_mhz.attr,
NULL,
};
--
2.43.0
