Commit 1524c28b authored by Andrzej Kacprowski's avatar Andrzej Kacprowski Committed by Jacek Lawrynowicz
Browse files

accel/ivpu: Show NPU frequency in sysfs 



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: default avatarAndrzej Kacprowski <Andrzej.Kacprowski@intel.com>
Signed-off-by: default avatarMaciej Falkowski <maciej.falkowski@linux.intel.com>
Reviewed-by: default avatarJacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Signed-off-by: default avatarJacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://lore.kernel.org/r/20250401155912.4049340-3-maciej.falkowski@linux.intel.com
parent 6c2b7540

drivers/accel/ivpu/ivpu_hw.h

+5 −0
Original line number Diff line number Diff line
@@ -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);

drivers/accel/ivpu/ivpu_hw_btrs.c

+8 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/accel/ivpu/ivpu_hw_btrs.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

drivers/accel/ivpu/ivpu_sysfs.c

+48 −1
Original line number Diff line number Diff line 
// 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,

};