Commit bcaf4152 authored by Oded Gabbay's avatar Oded Gabbay

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
......@@ -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
......
# 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
......@@ -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,
......
......@@ -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_ */
// 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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