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