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359b84f8db
Under some circumstances, firmware in the QAT devices could become unresponsive. The Heartbeat feature provides a mechanism to detect unresponsive devices. The QAT FW periodically writes to memory a set of counters that allow to detect the liveness of a device. This patch adds logic to enable the reporting of those counters, analyze them and report if a device is alive or not. In particular this adds (1) heartbeat enabling, reading and detection logic (2) reporting of heartbeat status and configuration via debugfs (3) documentation for the newly created sysfs entries (4) configuration of FW settings related to heartbeat, e.g. tick period (5) logic to convert time in ms (provided by the user) to clock ticks This patch introduces a new folder in debugfs called heartbeat with the following attributes: - status - queries_sent - queries_failed - config All attributes except config are reading only. In particular: - `status` file returns 0 when device is operational and -1 otherwise. - `queries_sent` returns the total number of heartbeat queries sent. - `queries_failed` returns the total number of heartbeat queries failed. - `config` allows to adjust the frequency at which the firmware writes counters to memory. This period is given in milliseconds and it is fixed for GEN4 devices. Signed-off-by: Damian Muszynski <damian.muszynski@intel.com> Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright(c) 2023 Intel Corporation */
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#include <linux/debugfs.h>
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#include "adf_accel_devices.h"
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#include "adf_cfg.h"
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#include "adf_common_drv.h"
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#include "adf_dbgfs.h"
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#include "adf_fw_counters.h"
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#include "adf_heartbeat_dbgfs.h"
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/**
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* adf_dbgfs_init() - add persistent debugfs entries
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* @accel_dev: Pointer to acceleration device.
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*
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* This function creates debugfs entries that are persistent through a device
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* state change (from up to down or vice versa).
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*/
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void adf_dbgfs_init(struct adf_accel_dev *accel_dev)
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{
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char name[ADF_DEVICE_NAME_LENGTH];
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void *ret;
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/* Create dev top level debugfs entry */
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snprintf(name, sizeof(name), "%s%s_%s", ADF_DEVICE_NAME_PREFIX,
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accel_dev->hw_device->dev_class->name,
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pci_name(accel_dev->accel_pci_dev.pci_dev));
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ret = debugfs_create_dir(name, NULL);
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if (IS_ERR_OR_NULL(ret))
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return;
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accel_dev->debugfs_dir = ret;
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adf_cfg_dev_dbgfs_add(accel_dev);
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}
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EXPORT_SYMBOL_GPL(adf_dbgfs_init);
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/**
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* adf_dbgfs_exit() - remove persistent debugfs entries
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* @accel_dev: Pointer to acceleration device.
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*/
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void adf_dbgfs_exit(struct adf_accel_dev *accel_dev)
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{
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adf_cfg_dev_dbgfs_rm(accel_dev);
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debugfs_remove(accel_dev->debugfs_dir);
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}
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EXPORT_SYMBOL_GPL(adf_dbgfs_exit);
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/**
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* adf_dbgfs_add() - add non-persistent debugfs entries
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* @accel_dev: Pointer to acceleration device.
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*
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* This function creates debugfs entries that are not persistent through
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* a device state change (from up to down or vice versa).
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*/
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void adf_dbgfs_add(struct adf_accel_dev *accel_dev)
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{
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if (!accel_dev->debugfs_dir)
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return;
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if (!accel_dev->is_vf) {
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adf_fw_counters_dbgfs_add(accel_dev);
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adf_heartbeat_dbgfs_add(accel_dev);
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}
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}
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/**
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* adf_dbgfs_rm() - remove non-persistent debugfs entries
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* @accel_dev: Pointer to acceleration device.
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*/
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void adf_dbgfs_rm(struct adf_accel_dev *accel_dev)
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{
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if (!accel_dev->debugfs_dir)
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return;
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if (!accel_dev->is_vf) {
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adf_heartbeat_dbgfs_rm(accel_dev);
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adf_fw_counters_dbgfs_rm(accel_dev);
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}
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}
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