Commit bcaf4152 authored by Oded Gabbay's avatar Oded Gabbay
Browse files

habanalabs: add hwmgr module for gaudi 



The hwmgr module is responsible for messages sent to GAUDI F/W that are
not common to all habanalabs ASICs.

In GAUDI, we provide the user a simplified mode of controlling the ASIC
clock frequency. Instead of three different clocks, we present a single
clock property that the user can configure via sysfs.

Signed-off-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent ac0ae6a9

Documentation/ABI/testing/sysfs-driver-habanalabs

+17 −0
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@@ -10,6 +10,23 @@ KernelVersion: 5.1 
Contact:        oded.gabbay@gmail.com

Description:    Version of the application running on the device's CPU



What:           /sys/class/habanalabs/hl<n>/clk_max_freq_mhz

Date:           Jun 2019

KernelVersion:  not yet upstreamed

Contact:        oded.gabbay@gmail.com

Description:    Allows the user to set the maximum clock frequency, in MHz.

                The device clock might be set to lower value than the maximum.

                The user should read the clk_cur_freq_mhz to see the actual

                frequency value of the device clock. This property is valid

                only for the Gaudi ASIC family



What:           /sys/class/habanalabs/hl<n>/clk_cur_freq_mhz

Date:           Jun 2019

KernelVersion:  not yet upstreamed

Contact:        oded.gabbay@gmail.com

Description:    Displays the current frequency, in MHz, of the device clock.

                This property is valid only for the Gaudi ASIC family



What:           /sys/class/habanalabs/hl<n>/cpld_ver

Date:           Jan 2019

KernelVersion:  5.1

drivers/misc/habanalabs/gaudi/Makefile

+1 −1
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0-only

subdir-ccflags-y += -I$(src)



HL_GAUDI_FILES := gaudi/gaudi.o
 
 No newline at end of file
 
HL_GAUDI_FILES := gaudi/gaudi.o gaudi/gaudi_hwmgr.o
 
 No newline at end of file

drivers/misc/habanalabs/gaudi/gaudi.c

+3 −3
Original line number Diff line number Diff line
@@ -7306,9 +7306,9 @@ static const struct hl_asic_funcs gaudi_funcs = { 
	.debugfs_write32 = gaudi_debugfs_write32,

	.debugfs_read64 = gaudi_debugfs_read64,

	.debugfs_write64 = gaudi_debugfs_write64,

	.add_device_attr = NULL,

	.add_device_attr = gaudi_add_device_attr,

	.handle_eqe = gaudi_handle_eqe,

	.set_pll_profile = NULL,

	.set_pll_profile = gaudi_set_pll_profile,

	.get_events_stat = gaudi_get_events_stat,

	.read_pte = gaudi_read_pte,

	.write_pte = gaudi_write_pte,
@@ -7332,7 +7332,7 @@ static const struct hl_asic_funcs gaudi_funcs = { 
	.rreg = hl_rreg,

	.wreg = hl_wreg,

	.halt_coresight = NULL,

	.get_clk_rate = NULL,

	.get_clk_rate = gaudi_get_clk_rate,

	.get_queue_id_for_cq = gaudi_get_queue_id_for_cq,

	.read_device_fw_version = gaudi_read_device_fw_version,

	.load_firmware_to_device = gaudi_load_firmware_to_device,

drivers/misc/habanalabs/gaudi/gaudiP.h

+5 −0
Original line number Diff line number Diff line
@@ -248,4 +248,9 @@ struct gaudi_device { 
	u8				ext_queue_idx;

};



void gaudi_add_device_attr(struct hl_device *hdev,

			struct attribute_group *dev_attr_grp);

void gaudi_set_pll_profile(struct hl_device *hdev, enum hl_pll_frequency freq);

int gaudi_get_clk_rate(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk);



#endif /* GAUDIP_H_ */

drivers/misc/habanalabs/gaudi/gaudi_hwmgr.c

0 → 100644
+121 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



/*

 * Copyright 2016-2018 HabanaLabs, Ltd.

 * All Rights Reserved.

 */



#include "gaudiP.h"

#include "include/gaudi/gaudi_fw_if.h"



void gaudi_set_pll_profile(struct hl_device *hdev, enum hl_pll_frequency freq)

{

	struct gaudi_device *gaudi = hdev->asic_specific;



	if (freq == PLL_LAST)

		hl_set_frequency(hdev, MME_PLL, gaudi->max_freq_value);

}



int gaudi_get_clk_rate(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk)

{

	long value;



	if (hl_device_disabled_or_in_reset(hdev))

		return -ENODEV;



	value = hl_get_frequency(hdev, MME_PLL, false);



	if (value < 0) {

		dev_err(hdev->dev, "Failed to retrieve device max clock %ld\n",

			value);

		return value;

	}



	*max_clk = (value / 1000 / 1000);



	value = hl_get_frequency(hdev, MME_PLL, true);



	if (value < 0) {

		dev_err(hdev->dev,

			"Failed to retrieve device current clock %ld\n",

			value);

		return value;

	}



	*cur_clk = (value / 1000 / 1000);



	return 0;

}



static ssize_t clk_max_freq_mhz_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct hl_device *hdev = dev_get_drvdata(dev);

	struct gaudi_device *gaudi = hdev->asic_specific;

	long value;



	if (hl_device_disabled_or_in_reset(hdev))

		return -ENODEV;



	value = hl_get_frequency(hdev, MME_PLL, false);



	gaudi->max_freq_value = value;



	return sprintf(buf, "%lu\n", (value / 1000 / 1000));

}



static ssize_t clk_max_freq_mhz_store(struct device *dev,

		struct device_attribute *attr, const char *buf, size_t count)

{

	struct hl_device *hdev = dev_get_drvdata(dev);

	struct gaudi_device *gaudi = hdev->asic_specific;

	int rc;

	u64 value;



	if (hl_device_disabled_or_in_reset(hdev)) {

		count = -ENODEV;

		goto fail;

	}



	rc = kstrtoull(buf, 0, &value);

	if (rc) {

		count = -EINVAL;

		goto fail;

	}



	gaudi->max_freq_value = value * 1000 * 1000;



	hl_set_frequency(hdev, MME_PLL, gaudi->max_freq_value);



fail:

	return count;

}



static ssize_t clk_cur_freq_mhz_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct hl_device *hdev = dev_get_drvdata(dev);

	long value;



	if (hl_device_disabled_or_in_reset(hdev))

		return -ENODEV;



	value = hl_get_frequency(hdev, MME_PLL, true);



	return sprintf(buf, "%lu\n", (value / 1000 / 1000));

}



static DEVICE_ATTR_RW(clk_max_freq_mhz);

static DEVICE_ATTR_RO(clk_cur_freq_mhz);



static struct attribute *gaudi_dev_attrs[] = {

	&dev_attr_clk_max_freq_mhz.attr,

	&dev_attr_clk_cur_freq_mhz.attr,

	NULL,

};



void gaudi_add_device_attr(struct hl_device *hdev,

			struct attribute_group *dev_attr_grp)

{

	dev_attr_grp->attrs = gaudi_dev_attrs;

}

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