mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
crypto: qat - fix device reset flow
When the device needs a reset, e.g. when an uncorrectable PCIe AER event occurs, various services/data structures need to be cleaned up, the hardware reset and the services/data structures initialized and started. The code to perform the cleanup and initialization was not performed when a device reset was done. This patch moves some of the initialization code out of the .probe entry- point into a separate function that is now called during probe as well as after the hardware has been reset. Similarly, a new function is added for first cleaning up these services/data structures prior to resetting. The new functions are adf_dev_init() and adf_dev_shutdown(), respectively, for which there are already prototypes but no actual functions just yet and are now called when the device is reset and during probe/cleanup of the driver. The down and up flows via ioctl calls has similarly been updated. In addition, there are two other bugs in the reset flow - one in the logic for determining whether to schedule a device reset upon receiving an uncorrectable AER event which prevents the reset flow from being initiated, and another with clearing the status bit indicating a device is configured (when resetting the device the configuration remains across the reset so the bit should not be cleared, otherwise, the necessary services will not be re-started in adf_dev_start() after the reset - clear the bit only when actually deleting the configuration). Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
parent
8a45ac12ec
commit
22e4dda06d
@ -148,6 +148,11 @@ struct adf_hw_device_data {
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int (*alloc_irq)(struct adf_accel_dev *accel_dev);
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void (*free_irq)(struct adf_accel_dev *accel_dev);
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void (*enable_error_correction)(struct adf_accel_dev *accel_dev);
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int (*init_admin_comms)(struct adf_accel_dev *accel_dev);
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void (*exit_admin_comms)(struct adf_accel_dev *accel_dev);
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int (*init_arb)(struct adf_accel_dev *accel_dev);
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void (*exit_arb)(struct adf_accel_dev *accel_dev);
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void (*enable_ints)(struct adf_accel_dev *accel_dev);
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const char *fw_name;
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uint32_t pci_dev_id;
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uint32_t fuses;
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@ -125,8 +125,9 @@ static void adf_device_reset_worker(struct work_struct *work)
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adf_dev_restarting_notify(accel_dev);
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adf_dev_stop(accel_dev);
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adf_dev_shutdown(accel_dev);
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adf_dev_restore(accel_dev);
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if (adf_dev_start(accel_dev)) {
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if (adf_dev_init(accel_dev) || adf_dev_start(accel_dev)) {
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/* The device hanged and we can't restart it so stop here */
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dev_err(&GET_DEV(accel_dev), "Restart device failed\n");
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kfree(reset_data);
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@ -148,8 +149,8 @@ static int adf_dev_aer_schedule_reset(struct adf_accel_dev *accel_dev,
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{
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struct adf_reset_dev_data *reset_data;
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if (adf_dev_started(accel_dev) &&
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!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
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if (!adf_dev_started(accel_dev) ||
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test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
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return 0;
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set_bit(ADF_STATUS_RESTARTING, &accel_dev->status);
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@ -50,6 +50,7 @@
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#include <linux/seq_file.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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static DEFINE_MUTEX(qat_cfg_read_lock);
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@ -159,6 +160,7 @@ void adf_cfg_del_all(struct adf_accel_dev *accel_dev)
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down_write(&dev_cfg_data->lock);
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adf_cfg_section_del_all(&dev_cfg_data->sec_list);
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up_write(&dev_cfg_data->lock);
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clear_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
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}
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/**
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@ -93,7 +93,7 @@ int adf_service_unregister(struct service_hndl *service);
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int adf_dev_init(struct adf_accel_dev *accel_dev);
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int adf_dev_start(struct adf_accel_dev *accel_dev);
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int adf_dev_stop(struct adf_accel_dev *accel_dev);
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int adf_dev_shutdown(struct adf_accel_dev *accel_dev);
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void adf_dev_shutdown(struct adf_accel_dev *accel_dev);
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int adf_ctl_dev_register(void);
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void adf_ctl_dev_unregister(void);
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@ -282,6 +282,8 @@ static int adf_ctl_stop_devices(uint32_t id)
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if (adf_dev_stop(accel_dev)) {
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pr_err("QAT: Failed to stop qat_dev%d\n", id);
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ret = -EFAULT;
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} else {
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adf_dev_shutdown(accel_dev);
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}
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}
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}
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@ -343,7 +345,9 @@ static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
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if (!adf_dev_started(accel_dev)) {
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pr_info("QAT: Starting acceleration device qat_dev%d.\n",
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ctl_data->device_id);
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ret = adf_dev_start(accel_dev);
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ret = adf_dev_init(accel_dev);
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if (!ret)
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ret = adf_dev_start(accel_dev);
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} else {
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pr_info("QAT: Acceleration device qat_dev%d already started.\n",
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ctl_data->device_id);
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@ -351,6 +355,7 @@ static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
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if (ret) {
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pr_err("QAT: Failed to start qat_dev%d\n", ctl_data->device_id);
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adf_dev_stop(accel_dev);
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adf_dev_shutdown(accel_dev);
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}
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out:
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kfree(ctl_data);
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@ -108,26 +108,47 @@ int adf_service_unregister(struct service_hndl *service)
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EXPORT_SYMBOL_GPL(adf_service_unregister);
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/**
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* adf_dev_start() - Start acceleration service for the given accel device
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* @accel_dev: Pointer to acceleration device.
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* adf_dev_init() - Init data structures and services for the given accel device
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* @accel_dev: Pointer to acceleration device.
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*
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* Function notifies all the registered services that the acceleration device
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* is ready to be used.
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* To be used by QAT device specific drivers.
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* Initialize the ring data structures and the admin comms and arbitration
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* services.
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*
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* Return: 0 on success, error code othewise.
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*/
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int adf_dev_start(struct adf_accel_dev *accel_dev)
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int adf_dev_init(struct adf_accel_dev *accel_dev)
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{
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struct service_hndl *service;
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struct list_head *list_itr;
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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if (!hw_data) {
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dev_err(&GET_DEV(accel_dev),
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"QAT: Failed to init device - hw_data not set\n");
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return -EFAULT;
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}
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if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status)) {
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pr_info("QAT: Device not configured\n");
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return -EFAULT;
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}
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set_bit(ADF_STATUS_STARTING, &accel_dev->status);
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if (adf_init_etr_data(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
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return -EFAULT;
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}
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if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
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return -EFAULT;
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}
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if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
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return -EFAULT;
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}
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hw_data->enable_ints(accel_dev);
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if (adf_ae_init(accel_dev)) {
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pr_err("QAT: Failed to initialise Acceleration Engine\n");
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@ -178,6 +199,27 @@ int adf_dev_start(struct adf_accel_dev *accel_dev)
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hw_data->enable_error_correction(accel_dev);
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return 0;
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}
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EXPORT_SYMBOL_GPL(adf_dev_init);
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/**
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* adf_dev_start() - Start acceleration service for the given accel device
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* @accel_dev: Pointer to acceleration device.
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*
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* Function notifies all the registered services that the acceleration device
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* is ready to be used.
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* To be used by QAT device specific drivers.
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*
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* Return: 0 on success, error code othewise.
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*/
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int adf_dev_start(struct adf_accel_dev *accel_dev)
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{
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struct service_hndl *service;
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struct list_head *list_itr;
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set_bit(ADF_STATUS_STARTING, &accel_dev->status);
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if (adf_ae_start(accel_dev)) {
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pr_err("QAT: AE Start Failed\n");
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return -EFAULT;
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@ -232,7 +274,6 @@ EXPORT_SYMBOL_GPL(adf_dev_start);
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*/
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int adf_dev_stop(struct adf_accel_dev *accel_dev)
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{
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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struct service_hndl *service;
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struct list_head *list_itr;
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int ret, wait = 0;
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@ -241,7 +282,6 @@ int adf_dev_stop(struct adf_accel_dev *accel_dev)
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!test_bit(ADF_STATUS_STARTING, &accel_dev->status)) {
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return 0;
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}
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clear_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
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clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
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clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
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@ -285,6 +325,29 @@ int adf_dev_stop(struct adf_accel_dev *accel_dev)
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clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(adf_dev_stop);
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/**
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* adf_dev_shutdown() - shutdown acceleration services and data strucutures
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* @accel_dev: Pointer to acceleration device
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*
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* Cleanup the ring data structures and the admin comms and arbitration
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* services.
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*/
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void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
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{
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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struct service_hndl *service;
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struct list_head *list_itr;
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if (!hw_data) {
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dev_err(&GET_DEV(accel_dev),
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"QAT: Failed to shutdown device - hw_data not set\n");
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return;
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}
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if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
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if (adf_ae_fw_release(accel_dev))
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pr_err("QAT: Failed to release the ucode\n");
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@ -335,9 +398,15 @@ int adf_dev_stop(struct adf_accel_dev *accel_dev)
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if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
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adf_cfg_del_all(accel_dev);
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return 0;
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if (hw_data->exit_arb)
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hw_data->exit_arb(accel_dev);
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if (hw_data->exit_admin_comms)
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hw_data->exit_admin_comms(accel_dev);
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adf_cleanup_etr_data(accel_dev);
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}
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EXPORT_SYMBOL_GPL(adf_dev_stop);
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EXPORT_SYMBOL_GPL(adf_dev_shutdown);
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int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
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{
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@ -46,6 +46,7 @@
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*/
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#include <adf_accel_devices.h>
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#include "adf_dh895xcc_hw_data.h"
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#include "adf_common_drv.h"
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#include "adf_drv.h"
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/* Worker thread to service arbiter mappings based on dev SKUs */
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@ -182,6 +183,19 @@ static void adf_enable_error_correction(struct adf_accel_dev *accel_dev)
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}
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}
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static void adf_enable_ints(struct adf_accel_dev *accel_dev)
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{
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void __iomem *addr;
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addr = (&GET_BARS(accel_dev)[ADF_DH895XCC_PMISC_BAR])->virt_addr;
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/* Enable bundle and misc interrupts */
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ADF_CSR_WR(addr, ADF_DH895XCC_SMIAPF0_MASK_OFFSET,
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ADF_DH895XCC_SMIA0_MASK);
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ADF_CSR_WR(addr, ADF_DH895XCC_SMIAPF1_MASK_OFFSET,
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ADF_DH895XCC_SMIA1_MASK);
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}
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void adf_init_hw_data_dh895xcc(struct adf_hw_device_data *hw_data)
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{
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hw_data->dev_class = &dh895xcc_class;
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@ -206,6 +220,11 @@ void adf_init_hw_data_dh895xcc(struct adf_hw_device_data *hw_data)
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hw_data->get_misc_bar_id = get_misc_bar_id;
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hw_data->get_sku = get_sku;
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hw_data->fw_name = ADF_DH895XCC_FW;
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hw_data->init_admin_comms = adf_init_admin_comms;
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hw_data->exit_admin_comms = adf_exit_admin_comms;
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hw_data->init_arb = adf_init_arb;
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hw_data->exit_arb = adf_exit_arb;
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hw_data->enable_ints = adf_enable_ints;
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}
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void adf_clean_hw_data_dh895xcc(struct adf_hw_device_data *hw_data)
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@ -90,9 +90,7 @@ static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
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struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
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int i;
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adf_exit_admin_comms(accel_dev);
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adf_exit_arb(accel_dev);
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adf_cleanup_etr_data(accel_dev);
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adf_dev_shutdown(accel_dev);
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for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
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struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
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@ -119,7 +117,7 @@ static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
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kfree(accel_dev);
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}
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static int qat_dev_start(struct adf_accel_dev *accel_dev)
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static int adf_dev_configure(struct adf_accel_dev *accel_dev)
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{
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int cpus = num_online_cpus();
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int banks = GET_MAX_BANKS(accel_dev);
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@ -206,7 +204,7 @@ static int qat_dev_start(struct adf_accel_dev *accel_dev)
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goto err;
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set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
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return adf_dev_start(accel_dev);
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return 0;
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err:
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dev_err(&GET_DEV(accel_dev), "Failed to start QAT accel dev\n");
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return -EINVAL;
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@ -217,7 +215,6 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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struct adf_accel_dev *accel_dev;
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struct adf_accel_pci *accel_pci_dev;
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struct adf_hw_device_data *hw_data;
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void __iomem *pmisc_bar_addr = NULL;
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char name[ADF_DEVICE_NAME_LENGTH];
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unsigned int i, bar_nr;
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int ret;
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@ -347,8 +344,6 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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ret = -EFAULT;
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goto out_err;
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}
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if (i == ADF_DH895XCC_PMISC_BAR)
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pmisc_bar_addr = bar->virt_addr;
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}
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pci_set_master(pdev);
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@ -358,36 +353,21 @@ static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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goto out_err;
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}
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if (adf_init_etr_data(accel_dev)) {
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dev_err(&pdev->dev, "Failed initialize etr\n");
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ret = -EFAULT;
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goto out_err;
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}
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if (adf_init_admin_comms(accel_dev)) {
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dev_err(&pdev->dev, "Failed initialize admin comms\n");
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ret = -EFAULT;
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goto out_err;
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}
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if (adf_init_arb(accel_dev)) {
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dev_err(&pdev->dev, "Failed initialize hw arbiter\n");
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ret = -EFAULT;
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goto out_err;
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}
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if (pci_save_state(pdev)) {
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dev_err(&pdev->dev, "Failed to save pci state\n");
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ret = -ENOMEM;
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goto out_err;
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}
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/* Enable bundle and misc interrupts */
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ADF_CSR_WR(pmisc_bar_addr, ADF_DH895XCC_SMIAPF0_MASK_OFFSET,
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ADF_DH895XCC_SMIA0_MASK);
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ADF_CSR_WR(pmisc_bar_addr, ADF_DH895XCC_SMIAPF1_MASK_OFFSET,
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ADF_DH895XCC_SMIA1_MASK);
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ret = adf_dev_configure(accel_dev);
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if (ret)
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goto out_err;
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ret = qat_dev_start(accel_dev);
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ret = adf_dev_init(accel_dev);
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if (ret)
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goto out_err;
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ret = adf_dev_start(accel_dev);
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if (ret) {
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adf_dev_stop(accel_dev);
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goto out_err;
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