drivers/crypto/qat/qat_common/adf_init.c

   1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
   2 /* Copyright(c) 2014 - 2020 Intel Corporation */
   3 #include <linux/mutex.h>
   4 #include <linux/list.h>
   5 #include <linux/bitops.h>
   6 #include <linux/delay.h>
   7 #include "adf_accel_devices.h"
   8 #include "adf_cfg.h"
   9 #include "adf_common_drv.h"
  10
  11 static LIST_HEAD(service_table);
  12 static DEFINE_MUTEX(service_lock);
  13
  14 static void adf_service_add(struct service_hndl *service)
  15 {
  16         mutex_lock(&service_lock);
  17         list_add(&service->list, &service_table);
  18         mutex_unlock(&service_lock);
  19 }
  20
  21 int adf_service_register(struct service_hndl *service)
  22 {
  23         memset(service->init_status, 0, sizeof(service->init_status));
  24         memset(service->start_status, 0, sizeof(service->start_status));
  25         adf_service_add(service);
  26         return 0;
  27 }
  28
  29 static void adf_service_remove(struct service_hndl *service)
  30 {
  31         mutex_lock(&service_lock);
  32         list_del(&service->list);
  33         mutex_unlock(&service_lock);
  34 }
  35
  36 int adf_service_unregister(struct service_hndl *service)
  37 {
  38         int i;
  39
  40         for (i = 0; i < ARRAY_SIZE(service->init_status); i++) {
  41                 if (service->init_status[i] || service->start_status[i]) {
  42                         pr_err("QAT: Could not remove active service\n");
  43                         return -EFAULT;
  44                 }
  45         }
  46         adf_service_remove(service);
  47         return 0;
  48 }
  49
  50 /**
  51  * adf_dev_init() - Init data structures and services for the given accel device
  52  * @accel_dev: Pointer to acceleration device.
  53  *
  54  * Initialize the ring data structures and the admin comms and arbitration
  55  * services.
  56  *
  57  * Return: 0 on success, error code otherwise.
  58  */
  59 int adf_dev_init(struct adf_accel_dev *accel_dev)
  60 {
  61         struct service_hndl *service;
  62         struct list_head *list_itr;
  63         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
  64         int ret;
  65
  66         if (!hw_data) {
  67                 dev_err(&GET_DEV(accel_dev),
  68                         "Failed to init device - hw_data not set\n");
  69                 return -EFAULT;
  70         }
  71
  72         if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status)) {
  73                 dev_err(&GET_DEV(accel_dev), "Device not configured\n");
  74                 return -EFAULT;
  75         }
  76
  77         if (adf_init_etr_data(accel_dev)) {
  78                 dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
  79                 return -EFAULT;
  80         }
  81
  82         if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
  83                 dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
  84                 return -EFAULT;
  85         }
  86
  87         if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
  88                 dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
  89                 return -EFAULT;
  90         }
  91
  92         hw_data->enable_ints(accel_dev);
  93
  94         if (adf_ae_init(accel_dev)) {
  95                 dev_err(&GET_DEV(accel_dev),
  96                         "Failed to initialise Acceleration Engine\n");
  97                 return -EFAULT;
  98         }
  99         set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);
 100
 101         if (adf_ae_fw_load(accel_dev)) {
 102                 dev_err(&GET_DEV(accel_dev),
 103                         "Failed to load acceleration FW\n");
 104                 return -EFAULT;
 105         }
 106         set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
 107
 108         if (hw_data->alloc_irq(accel_dev)) {
 109                 dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
 110                 return -EFAULT;
 111         }
 112         set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
 113
 114         /*
 115          * Subservice initialisation is divided into two stages: init and start.
 116          * This is to facilitate any ordering dependencies between services
 117          * prior to starting any of the accelerators.
 118          */
 119         list_for_each(list_itr, &service_table) {
 120                 service = list_entry(list_itr, struct service_hndl, list);
 121                 if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
 122                         dev_err(&GET_DEV(accel_dev),
 123                                 "Failed to initialise service %s\n",
 124                                 service->name);
 125                         return -EFAULT;
 126                 }
 127                 set_bit(accel_dev->accel_id, service->init_status);
 128         }
 129
 130         hw_data->enable_error_correction(accel_dev);
 131         ret = hw_data->enable_vf2pf_comms(accel_dev);
 132
 133         return ret;
 134 }
 135 EXPORT_SYMBOL_GPL(adf_dev_init);
 136
 137 /**
 138  * adf_dev_start() - Start acceleration service for the given accel device
 139  * @accel_dev:    Pointer to acceleration device.
 140  *
 141  * Function notifies all the registered services that the acceleration device
 142  * is ready to be used.
 143  * To be used by QAT device specific drivers.
 144  *
 145  * Return: 0 on success, error code otherwise.
 146  */
 147 int adf_dev_start(struct adf_accel_dev *accel_dev)
 148 {
 149         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 150         struct service_hndl *service;
 151         struct list_head *list_itr;
 152
 153         set_bit(ADF_STATUS_STARTING, &accel_dev->status);
 154
 155         if (adf_ae_start(accel_dev)) {
 156                 dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
 157                 return -EFAULT;
 158         }
 159         set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
 160
 161         if (hw_data->send_admin_init(accel_dev)) {
 162                 dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
 163                 return -EFAULT;
 164         }
 165
 166         list_for_each(list_itr, &service_table) {
 167                 service = list_entry(list_itr, struct service_hndl, list);
 168                 if (service->event_hld(accel_dev, ADF_EVENT_START)) {
 169                         dev_err(&GET_DEV(accel_dev),
 170                                 "Failed to start service %s\n",
 171                                 service->name);
 172                         return -EFAULT;
 173                 }
 174                 set_bit(accel_dev->accel_id, service->start_status);
 175         }
 176
 177         clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 178         set_bit(ADF_STATUS_STARTED, &accel_dev->status);
 179
 180         if (!list_empty(&accel_dev->crypto_list) &&
 181             (qat_algs_register() || qat_asym_algs_register())) {
 182                 dev_err(&GET_DEV(accel_dev),
 183                         "Failed to register crypto algs\n");
 184                 set_bit(ADF_STATUS_STARTING, &accel_dev->status);
 185                 clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 186                 return -EFAULT;
 187         }
 188         return 0;
 189 }
 190 EXPORT_SYMBOL_GPL(adf_dev_start);
 191
 192 /**
 193  * adf_dev_stop() - Stop acceleration service for the given accel device
 194  * @accel_dev:    Pointer to acceleration device.
 195  *
 196  * Function notifies all the registered services that the acceleration device
 197  * is shuting down.
 198  * To be used by QAT device specific drivers.
 199  *
 200  * Return: void
 201  */
 202 void adf_dev_stop(struct adf_accel_dev *accel_dev)
 203 {
 204         struct service_hndl *service;
 205         struct list_head *list_itr;
 206         bool wait = false;
 207         int ret;
 208
 209         if (!adf_dev_started(accel_dev) &&
 210             !test_bit(ADF_STATUS_STARTING, &accel_dev->status))
 211                 return;
 212
 213         clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 214         clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 215
 216         if (!list_empty(&accel_dev->crypto_list)) {
 217                 qat_algs_unregister();
 218                 qat_asym_algs_unregister();
 219         }
 220
 221         list_for_each(list_itr, &service_table) {
 222                 service = list_entry(list_itr, struct service_hndl, list);
 223                 if (!test_bit(accel_dev->accel_id, service->start_status))
 224                         continue;
 225                 ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
 226                 if (!ret) {
 227                         clear_bit(accel_dev->accel_id, service->start_status);
 228                 } else if (ret == -EAGAIN) {
 229                         wait = true;
 230                         clear_bit(accel_dev->accel_id, service->start_status);
 231                 }
 232         }
 233
 234         if (wait)
 235                 msleep(100);
 236
 237         if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
 238                 if (adf_ae_stop(accel_dev))
 239                         dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
 240                 else
 241                         clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
 242         }
 243 }
 244 EXPORT_SYMBOL_GPL(adf_dev_stop);
 245
 246 /**
 247  * adf_dev_shutdown() - shutdown acceleration services and data strucutures
 248  * @accel_dev: Pointer to acceleration device
 249  *
 250  * Cleanup the ring data structures and the admin comms and arbitration
 251  * services.
 252  */
 253 void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
 254 {
 255         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 256         struct service_hndl *service;
 257         struct list_head *list_itr;
 258
 259         if (!hw_data) {
 260                 dev_err(&GET_DEV(accel_dev),
 261                         "QAT: Failed to shutdown device - hw_data not set\n");
 262                 return;
 263         }
 264
 265         if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
 266                 adf_ae_fw_release(accel_dev);
 267                 clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
 268         }
 269
 270         if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
 271                 if (adf_ae_shutdown(accel_dev))
 272                         dev_err(&GET_DEV(accel_dev),
 273                                 "Failed to shutdown Accel Engine\n");
 274                 else
 275                         clear_bit(ADF_STATUS_AE_INITIALISED,
 276                                   &accel_dev->status);
 277         }
 278
 279         list_for_each(list_itr, &service_table) {
 280                 service = list_entry(list_itr, struct service_hndl, list);
 281                 if (!test_bit(accel_dev->accel_id, service->init_status))
 282                         continue;
 283                 if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
 284                         dev_err(&GET_DEV(accel_dev),
 285                                 "Failed to shutdown service %s\n",
 286                                 service->name);
 287                 else
 288                         clear_bit(accel_dev->accel_id, service->init_status);
 289         }
 290
 291         hw_data->disable_iov(accel_dev);
 292
 293         if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
 294                 hw_data->free_irq(accel_dev);
 295                 clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
 296         }
 297
 298         /* Delete configuration only if not restarting */
 299         if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
 300                 adf_cfg_del_all(accel_dev);
 301
 302         if (hw_data->exit_arb)
 303                 hw_data->exit_arb(accel_dev);
 304
 305         if (hw_data->exit_admin_comms)
 306                 hw_data->exit_admin_comms(accel_dev);
 307
 308         adf_cleanup_etr_data(accel_dev);
 309         adf_dev_restore(accel_dev);
 310 }
 311 EXPORT_SYMBOL_GPL(adf_dev_shutdown);
 312
 313 int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
 314 {
 315         struct service_hndl *service;
 316         struct list_head *list_itr;
 317
 318         list_for_each(list_itr, &service_table) {
 319                 service = list_entry(list_itr, struct service_hndl, list);
 320                 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
 321                         dev_err(&GET_DEV(accel_dev),
 322                                 "Failed to restart service %s.\n",
 323                                 service->name);
 324         }
 325         return 0;
 326 }
 327
 328 int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
 329 {
 330         struct service_hndl *service;
 331         struct list_head *list_itr;
 332
 333         list_for_each(list_itr, &service_table) {
 334                 service = list_entry(list_itr, struct service_hndl, list);
 335                 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
 336                         dev_err(&GET_DEV(accel_dev),
 337                                 "Failed to restart service %s.\n",
 338                                 service->name);
 339         }
 340         return 0;
 341 }