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         if (adf_ae_init(accel_dev)) {
  93                 dev_err(&GET_DEV(accel_dev),
  94                         "Failed to initialise Acceleration Engine\n");
  95                 return -EFAULT;
  96         }
  97         set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);
  98
  99         if (adf_ae_fw_load(accel_dev)) {
 100                 dev_err(&GET_DEV(accel_dev),
 101                         "Failed to load acceleration FW\n");
 102                 return -EFAULT;
 103         }
 104         set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
 105
 106         if (hw_data->alloc_irq(accel_dev)) {
 107                 dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
 108                 return -EFAULT;
 109         }
 110         set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
 111
 112         hw_data->enable_ints(accel_dev);
 113         hw_data->enable_error_correction(accel_dev);
 114
 115         ret = hw_data->enable_pfvf_comms(accel_dev);
 116         if (ret)
 117                 return ret;
 118
 119         /*
 120          * Subservice initialisation is divided into two stages: init and start.
 121          * This is to facilitate any ordering dependencies between services
 122          * prior to starting any of the accelerators.
 123          */
 124         list_for_each(list_itr, &service_table) {
 125                 service = list_entry(list_itr, struct service_hndl, list);
 126                 if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
 127                         dev_err(&GET_DEV(accel_dev),
 128                                 "Failed to initialise service %s\n",
 129                                 service->name);
 130                         return -EFAULT;
 131                 }
 132                 set_bit(accel_dev->accel_id, service->init_status);
 133         }
 134
 135         return 0;
 136 }
 137 EXPORT_SYMBOL_GPL(adf_dev_init);
 138
 139 /**
 140  * adf_dev_start() - Start acceleration service for the given accel device
 141  * @accel_dev:    Pointer to acceleration device.
 142  *
 143  * Function notifies all the registered services that the acceleration device
 144  * is ready to be used.
 145  * To be used by QAT device specific drivers.
 146  *
 147  * Return: 0 on success, error code otherwise.
 148  */
 149 int adf_dev_start(struct adf_accel_dev *accel_dev)
 150 {
 151         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 152         struct service_hndl *service;
 153         struct list_head *list_itr;
 154
 155         set_bit(ADF_STATUS_STARTING, &accel_dev->status);
 156
 157         if (adf_ae_start(accel_dev)) {
 158                 dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
 159                 return -EFAULT;
 160         }
 161         set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
 162
 163         if (hw_data->send_admin_init(accel_dev)) {
 164                 dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
 165                 return -EFAULT;
 166         }
 167
 168         /* Set ssm watch dog timer */
 169         if (hw_data->set_ssm_wdtimer)
 170                 hw_data->set_ssm_wdtimer(accel_dev);
 171
 172         list_for_each(list_itr, &service_table) {
 173                 service = list_entry(list_itr, struct service_hndl, list);
 174                 if (service->event_hld(accel_dev, ADF_EVENT_START)) {
 175                         dev_err(&GET_DEV(accel_dev),
 176                                 "Failed to start service %s\n",
 177                                 service->name);
 178                         return -EFAULT;
 179                 }
 180                 set_bit(accel_dev->accel_id, service->start_status);
 181         }
 182
 183         clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 184         set_bit(ADF_STATUS_STARTED, &accel_dev->status);
 185
 186         if (!list_empty(&accel_dev->crypto_list) &&
 187             (qat_algs_register() || qat_asym_algs_register())) {
 188                 dev_err(&GET_DEV(accel_dev),
 189                         "Failed to register crypto algs\n");
 190                 set_bit(ADF_STATUS_STARTING, &accel_dev->status);
 191                 clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 192                 return -EFAULT;
 193         }
 194         return 0;
 195 }
 196 EXPORT_SYMBOL_GPL(adf_dev_start);
 197
 198 /**
 199  * adf_dev_stop() - Stop acceleration service for the given accel device
 200  * @accel_dev:    Pointer to acceleration device.
 201  *
 202  * Function notifies all the registered services that the acceleration device
 203  * is shuting down.
 204  * To be used by QAT device specific drivers.
 205  *
 206  * Return: void
 207  */
 208 void adf_dev_stop(struct adf_accel_dev *accel_dev)
 209 {
 210         struct service_hndl *service;
 211         struct list_head *list_itr;
 212         bool wait = false;
 213         int ret;
 214
 215         if (!adf_dev_started(accel_dev) &&
 216             !test_bit(ADF_STATUS_STARTING, &accel_dev->status))
 217                 return;
 218
 219         clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 220         clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 221
 222         if (!list_empty(&accel_dev->crypto_list)) {
 223                 qat_algs_unregister();
 224                 qat_asym_algs_unregister();
 225         }
 226
 227         list_for_each(list_itr, &service_table) {
 228                 service = list_entry(list_itr, struct service_hndl, list);
 229                 if (!test_bit(accel_dev->accel_id, service->start_status))
 230                         continue;
 231                 ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
 232                 if (!ret) {
 233                         clear_bit(accel_dev->accel_id, service->start_status);
 234                 } else if (ret == -EAGAIN) {
 235                         wait = true;
 236                         clear_bit(accel_dev->accel_id, service->start_status);
 237                 }
 238         }
 239
 240         if (wait)
 241                 msleep(100);
 242
 243         if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
 244                 if (adf_ae_stop(accel_dev))
 245                         dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
 246                 else
 247                         clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
 248         }
 249 }
 250 EXPORT_SYMBOL_GPL(adf_dev_stop);
 251
 252 /**
 253  * adf_dev_shutdown() - shutdown acceleration services and data strucutures
 254  * @accel_dev: Pointer to acceleration device
 255  *
 256  * Cleanup the ring data structures and the admin comms and arbitration
 257  * services.
 258  */
 259 void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
 260 {
 261         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 262         struct service_hndl *service;
 263         struct list_head *list_itr;
 264
 265         if (!hw_data) {
 266                 dev_err(&GET_DEV(accel_dev),
 267                         "QAT: Failed to shutdown device - hw_data not set\n");
 268                 return;
 269         }
 270
 271         if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
 272                 adf_ae_fw_release(accel_dev);
 273                 clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
 274         }
 275
 276         if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
 277                 if (adf_ae_shutdown(accel_dev))
 278                         dev_err(&GET_DEV(accel_dev),
 279                                 "Failed to shutdown Accel Engine\n");
 280                 else
 281                         clear_bit(ADF_STATUS_AE_INITIALISED,
 282                                   &accel_dev->status);
 283         }
 284
 285         list_for_each(list_itr, &service_table) {
 286                 service = list_entry(list_itr, struct service_hndl, list);
 287                 if (!test_bit(accel_dev->accel_id, service->init_status))
 288                         continue;
 289                 if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
 290                         dev_err(&GET_DEV(accel_dev),
 291                                 "Failed to shutdown service %s\n",
 292                                 service->name);
 293                 else
 294                         clear_bit(accel_dev->accel_id, service->init_status);
 295         }
 296
 297         hw_data->disable_iov(accel_dev);
 298
 299         if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
 300                 hw_data->free_irq(accel_dev);
 301                 clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
 302         }
 303
 304         /* Delete configuration only if not restarting */
 305         if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
 306                 adf_cfg_del_all(accel_dev);
 307
 308         if (hw_data->exit_arb)
 309                 hw_data->exit_arb(accel_dev);
 310
 311         if (hw_data->exit_admin_comms)
 312                 hw_data->exit_admin_comms(accel_dev);
 313
 314         adf_cleanup_etr_data(accel_dev);
 315         adf_dev_restore(accel_dev);
 316 }
 317 EXPORT_SYMBOL_GPL(adf_dev_shutdown);
 318
 319 int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
 320 {
 321         struct service_hndl *service;
 322         struct list_head *list_itr;
 323
 324         list_for_each(list_itr, &service_table) {
 325                 service = list_entry(list_itr, struct service_hndl, list);
 326                 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
 327                         dev_err(&GET_DEV(accel_dev),
 328                                 "Failed to restart service %s.\n",
 329                                 service->name);
 330         }
 331         return 0;
 332 }
 333
 334 int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
 335 {
 336         struct service_hndl *service;
 337         struct list_head *list_itr;
 338
 339         list_for_each(list_itr, &service_table) {
 340                 service = list_entry(list_itr, struct service_hndl, list);
 341                 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
 342                         dev_err(&GET_DEV(accel_dev),
 343                                 "Failed to restart service %s.\n",
 344                                 service->name);
 345         }
 346         return 0;
 347 }