crypto: qat - add auto reset on error
Expose the `auto_reset` sysfs attribute to configure the driver to reset the device when a fatal error is detected. When auto reset is enabled, the driver resets the device when it detects either an heartbeat failure or a fatal error through an interrupt. This patch is based on earlier work done by Shashank Gupta. Signed-off-by: Damian Muszynski <damian.muszynski@intel.com> Reviewed-by: Ahsan Atta <ahsan.atta@intel.com> Reviewed-by: Markas Rapoportas <markas.rapoportas@intel.com> Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Mun Chun Yep <mun.chun.yep@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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@ -141,3 +141,23 @@ Description:
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64
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This attribute is only available for qat_4xxx devices.
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What: /sys/bus/pci/devices/<BDF>/qat/auto_reset
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Date: March 2024
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KernelVersion: 6.8
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Contact: qat-linux@intel.com
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Description: (RW) Reports the current state of the autoreset feature
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for a QAT device
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Write to the attribute to enable or disable device auto reset.
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Device auto reset is disabled by default.
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The values are::
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* 1/Yy/on: auto reset enabled. If the device encounters an
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unrecoverable error, it will be reset automatically.
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* 0/Nn/off: auto reset disabled. If the device encounters an
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unrecoverable error, it will not be reset.
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This attribute is only available for qat_4xxx devices.
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@ -402,6 +402,7 @@ struct adf_accel_dev {
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struct adf_error_counters ras_errors;
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struct mutex state_lock; /* protect state of the device */
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bool is_vf;
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bool autoreset_on_error;
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u32 accel_id;
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};
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#endif
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@ -204,6 +204,14 @@ const struct pci_error_handlers adf_err_handler = {
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};
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EXPORT_SYMBOL_GPL(adf_err_handler);
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int adf_dev_autoreset(struct adf_accel_dev *accel_dev)
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{
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if (accel_dev->autoreset_on_error)
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return adf_dev_aer_schedule_reset(accel_dev, ADF_DEV_RESET_ASYNC);
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return 0;
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}
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static void adf_notify_fatal_error_worker(struct work_struct *work)
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{
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struct adf_fatal_error_data *wq_data =
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@ -215,10 +223,11 @@ static void adf_notify_fatal_error_worker(struct work_struct *work)
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if (!accel_dev->is_vf) {
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/* Disable arbitration to stop processing of new requests */
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if (hw_device->exit_arb)
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if (accel_dev->autoreset_on_error && hw_device->exit_arb)
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hw_device->exit_arb(accel_dev);
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if (accel_dev->pf.vf_info)
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adf_pf2vf_notify_fatal_error(accel_dev);
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adf_dev_autoreset(accel_dev);
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}
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kfree(wq_data);
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@ -87,6 +87,7 @@ int adf_ae_stop(struct adf_accel_dev *accel_dev);
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extern const struct pci_error_handlers adf_err_handler;
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void adf_reset_sbr(struct adf_accel_dev *accel_dev);
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void adf_reset_flr(struct adf_accel_dev *accel_dev);
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int adf_dev_autoreset(struct adf_accel_dev *accel_dev);
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void adf_dev_restore(struct adf_accel_dev *accel_dev);
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int adf_init_aer(void);
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void adf_exit_aer(void);
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@ -204,6 +204,42 @@ static ssize_t pm_idle_enabled_store(struct device *dev, struct device_attribute
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}
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static DEVICE_ATTR_RW(pm_idle_enabled);
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static ssize_t auto_reset_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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char *auto_reset;
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struct adf_accel_dev *accel_dev;
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accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
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if (!accel_dev)
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return -EINVAL;
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auto_reset = accel_dev->autoreset_on_error ? "on" : "off";
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return sysfs_emit(buf, "%s\n", auto_reset);
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}
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static ssize_t auto_reset_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct adf_accel_dev *accel_dev;
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bool enabled = false;
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int ret;
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ret = kstrtobool(buf, &enabled);
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if (ret)
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return ret;
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accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
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if (!accel_dev)
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return -EINVAL;
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accel_dev->autoreset_on_error = enabled;
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return count;
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}
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static DEVICE_ATTR_RW(auto_reset);
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static DEVICE_ATTR_RW(state);
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static DEVICE_ATTR_RW(cfg_services);
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@ -291,6 +327,7 @@ static struct attribute *qat_attrs[] = {
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&dev_attr_pm_idle_enabled.attr,
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&dev_attr_rp2srv.attr,
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&dev_attr_num_rps.attr,
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&dev_attr_auto_reset.attr,
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NULL,
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};
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