diff options
Diffstat (limited to 'drivers/crypto/qat/qat_common/adf_aer.c')
| -rw-r--r-- | drivers/crypto/qat/qat_common/adf_aer.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/drivers/crypto/qat/qat_common/adf_aer.c b/drivers/crypto/qat/qat_common/adf_aer.c deleted file mode 100644 index 04af32a2811c..000000000000 --- a/drivers/crypto/qat/qat_common/adf_aer.c +++ /dev/null @@ -1,185 +0,0 @@ -// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) -/* Copyright(c) 2014 - 2020 Intel Corporation */ -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/completion.h> -#include <linux/workqueue.h> -#include <linux/delay.h> -#include "adf_accel_devices.h" -#include "adf_common_drv.h" - -static struct workqueue_struct *device_reset_wq; - -static pci_ers_result_t adf_error_detected(struct pci_dev *pdev, - pci_channel_state_t state) -{ - struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev); - - dev_info(&pdev->dev, "Acceleration driver hardware error detected.\n"); - if (!accel_dev) { - dev_err(&pdev->dev, "Can't find acceleration device\n"); - return PCI_ERS_RESULT_DISCONNECT; - } - - if (state == pci_channel_io_perm_failure) { - dev_err(&pdev->dev, "Can't recover from device error\n"); - return PCI_ERS_RESULT_DISCONNECT; - } - - return PCI_ERS_RESULT_NEED_RESET; -} - -/* reset dev data */ -struct adf_reset_dev_data { - int mode; - struct adf_accel_dev *accel_dev; - struct completion compl; - struct work_struct reset_work; -}; - -void adf_reset_sbr(struct adf_accel_dev *accel_dev) -{ - struct pci_dev *pdev = accel_to_pci_dev(accel_dev); - struct pci_dev *parent = pdev->bus->self; - u16 bridge_ctl = 0; - - if (!parent) - parent = pdev; - - if (!pci_wait_for_pending_transaction(pdev)) - dev_info(&GET_DEV(accel_dev), - "Transaction still in progress. Proceeding\n"); - - dev_info(&GET_DEV(accel_dev), "Secondary bus reset\n"); - - pci_read_config_word(parent, PCI_BRIDGE_CONTROL, &bridge_ctl); - bridge_ctl |= PCI_BRIDGE_CTL_BUS_RESET; - pci_write_config_word(parent, PCI_BRIDGE_CONTROL, bridge_ctl); - msleep(100); - bridge_ctl &= ~PCI_BRIDGE_CTL_BUS_RESET; - pci_write_config_word(parent, PCI_BRIDGE_CONTROL, bridge_ctl); - msleep(100); -} -EXPORT_SYMBOL_GPL(adf_reset_sbr); - -void adf_reset_flr(struct adf_accel_dev *accel_dev) -{ - pcie_flr(accel_to_pci_dev(accel_dev)); -} -EXPORT_SYMBOL_GPL(adf_reset_flr); - -void adf_dev_restore(struct adf_accel_dev *accel_dev) -{ - struct adf_hw_device_data *hw_device = accel_dev->hw_device; - struct pci_dev *pdev = accel_to_pci_dev(accel_dev); - - if (hw_device->reset_device) { - dev_info(&GET_DEV(accel_dev), "Resetting device qat_dev%d\n", - accel_dev->accel_id); - hw_device->reset_device(accel_dev); - pci_restore_state(pdev); - pci_save_state(pdev); - } -} - -static void adf_device_reset_worker(struct work_struct *work) -{ - struct adf_reset_dev_data *reset_data = - container_of(work, struct adf_reset_dev_data, reset_work); - struct adf_accel_dev *accel_dev = reset_data->accel_dev; - - adf_dev_restarting_notify(accel_dev); - if (adf_dev_restart(accel_dev)) { - /* The device hanged and we can't restart it so stop here */ - dev_err(&GET_DEV(accel_dev), "Restart device failed\n"); - kfree(reset_data); - WARN(1, "QAT: device restart failed. Device is unusable\n"); - return; - } - adf_dev_restarted_notify(accel_dev); - clear_bit(ADF_STATUS_RESTARTING, &accel_dev->status); - - /* The dev is back alive. Notify the caller if in sync mode */ - if (reset_data->mode == ADF_DEV_RESET_SYNC) - complete(&reset_data->compl); - else - kfree(reset_data); -} - -static int adf_dev_aer_schedule_reset(struct adf_accel_dev *accel_dev, - enum adf_dev_reset_mode mode) -{ - struct adf_reset_dev_data *reset_data; - - if (!adf_dev_started(accel_dev) || - test_bit(ADF_STATUS_RESTARTING, &accel_dev->status)) - return 0; - - set_bit(ADF_STATUS_RESTARTING, &accel_dev->status); - reset_data = kzalloc(sizeof(*reset_data), GFP_KERNEL); - if (!reset_data) - return -ENOMEM; - reset_data->accel_dev = accel_dev; - init_completion(&reset_data->compl); - reset_data->mode = mode; - INIT_WORK(&reset_data->reset_work, adf_device_reset_worker); - queue_work(device_reset_wq, &reset_data->reset_work); - - /* If in sync mode wait for the result */ - if (mode == ADF_DEV_RESET_SYNC) { - int ret = 0; - /* Maximum device reset time is 10 seconds */ - unsigned long wait_jiffies = msecs_to_jiffies(10000); - unsigned long timeout = wait_for_completion_timeout( - &reset_data->compl, wait_jiffies); - if (!timeout) { - dev_err(&GET_DEV(accel_dev), - "Reset device timeout expired\n"); - ret = -EFAULT; - } - kfree(reset_data); - return ret; - } - return 0; -} - -static pci_ers_result_t adf_slot_reset(struct pci_dev *pdev) -{ - struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev); - - if (!accel_dev) { - pr_err("QAT: Can't find acceleration device\n"); - return PCI_ERS_RESULT_DISCONNECT; - } - if (adf_dev_aer_schedule_reset(accel_dev, ADF_DEV_RESET_SYNC)) - return PCI_ERS_RESULT_DISCONNECT; - - return PCI_ERS_RESULT_RECOVERED; -} - -static void adf_resume(struct pci_dev *pdev) -{ - dev_info(&pdev->dev, "Acceleration driver reset completed\n"); - dev_info(&pdev->dev, "Device is up and running\n"); -} - -const struct pci_error_handlers adf_err_handler = { - .error_detected = adf_error_detected, - .slot_reset = adf_slot_reset, - .resume = adf_resume, -}; -EXPORT_SYMBOL_GPL(adf_err_handler); - -int adf_init_aer(void) -{ - device_reset_wq = alloc_workqueue("qat_device_reset_wq", - WQ_MEM_RECLAIM, 0); - return !device_reset_wq ? -EFAULT : 0; -} - -void adf_exit_aer(void) -{ - if (device_reset_wq) - destroy_workqueue(device_reset_wq); - device_reset_wq = NULL; -} |