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         /* Set ssm watch dog timer */
 166         if (hw_data->set_ssm_wdtimer)
 167                 hw_data->set_ssm_wdtimer(accel_dev);
 168
 169         list_for_each(list_itr, &service_table) {
 170                 service = list_entry(list_itr, struct service_hndl, list);
 171                 if (service->event_hld(accel_dev, ADF_EVENT_START)) {
 172                         dev_err(&GET_DEV(accel_dev),
 173                                 "Failed to start service %s\n",
 174                                 service->name);
 175                         return -EFAULT;
 176                 }
 177                 set_bit(accel_dev->accel_id, service->start_status);
 178         }
 179
 180         clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 181         set_bit(ADF_STATUS_STARTED, &accel_dev->status);
 182
 183         if (!list_empty(&accel_dev->crypto_list) &&
 184             (qat_algs_register() || qat_asym_algs_register())) {
 185                 dev_err(&GET_DEV(accel_dev),
 186                         "Failed to register crypto algs\n");
 187                 set_bit(ADF_STATUS_STARTING, &accel_dev->status);
 188                 clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 189                 return -EFAULT;
 190         }
 191         return 0;
 192 }
 193 EXPORT_SYMBOL_GPL(adf_dev_start);
 194
 195 /**
 196  * adf_dev_stop() - Stop acceleration service for the given accel device
 197  * @accel_dev:    Pointer to acceleration device.
 198  *
 199  * Function notifies all the registered services that the acceleration device
 200  * is shuting down.
 201  * To be used by QAT device specific drivers.
 202  *
 203  * Return: void
 204  */
 205 void adf_dev_stop(struct adf_accel_dev *accel_dev)
 206 {
 207         struct service_hndl *service;
 208         struct list_head *list_itr;
 209         bool wait = false;
 210         int ret;
 211
 212         if (!adf_dev_started(accel_dev) &&
 213             !test_bit(ADF_STATUS_STARTING, &accel_dev->status))
 214                 return;
 215
 216         clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
 217         clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
 218
 219         if (!list_empty(&accel_dev->crypto_list)) {
 220                 qat_algs_unregister();
 221                 qat_asym_algs_unregister();
 222         }
 223
 224         list_for_each(list_itr, &service_table) {
 225                 service = list_entry(list_itr, struct service_hndl, list);
 226                 if (!test_bit(accel_dev->accel_id, service->start_status))
 227                         continue;
 228                 ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
 229                 if (!ret) {
 230                         clear_bit(accel_dev->accel_id, service->start_status);
 231                 } else if (ret == -EAGAIN) {
 232                         wait = true;
 233                         clear_bit(accel_dev->accel_id, service->start_status);
 234                 }
 235         }
 236
 237         if (wait)
 238                 msleep(100);
 239
 240         if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
 241                 if (adf_ae_stop(accel_dev))
 242                         dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
 243                 else
 244                         clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
 245         }
 246 }
 247 EXPORT_SYMBOL_GPL(adf_dev_stop);
 248
 249 /**
 250  * adf_dev_shutdown() - shutdown acceleration services and data strucutures
 251  * @accel_dev: Pointer to acceleration device
 252  *
 253  * Cleanup the ring data structures and the admin comms and arbitration
 254  * services.
 255  */
 256 void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
 257 {
 258         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 259         struct service_hndl *service;
 260         struct list_head *list_itr;
 261
 262         if (!hw_data) {
 263                 dev_err(&GET_DEV(accel_dev),
 264                         "QAT: Failed to shutdown device - hw_data not set\n");
 265                 return;
 266         }
 267
 268         if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
 269                 adf_ae_fw_release(accel_dev);
 270                 clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
 271         }
 272
 273         if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
 274                 if (adf_ae_shutdown(accel_dev))
 275                         dev_err(&GET_DEV(accel_dev),
 276                                 "Failed to shutdown Accel Engine\n");
 277                 else
 278                         clear_bit(ADF_STATUS_AE_INITIALISED,
 279                                   &accel_dev->status);
 280         }
 281
 282         list_for_each(list_itr, &service_table) {
 283                 service = list_entry(list_itr, struct service_hndl, list);
 284                 if (!test_bit(accel_dev->accel_id, service->init_status))
 285                         continue;
 286                 if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
 287                         dev_err(&GET_DEV(accel_dev),
 288                                 "Failed to shutdown service %s\n",
 289                                 service->name);
 290                 else
 291                         clear_bit(accel_dev->accel_id, service->init_status);
 292         }
 293
 294         hw_data->disable_iov(accel_dev);
 295
 296         if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
 297                 hw_data->free_irq(accel_dev);
 298                 clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
 299         }
 300
 301         /* Delete configuration only if not restarting */
 302         if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
 303                 adf_cfg_del_all(accel_dev);
 304
 305         if (hw_data->exit_arb)
 306                 hw_data->exit_arb(accel_dev);
 307
 308         if (hw_data->exit_admin_comms)
 309                 hw_data->exit_admin_comms(accel_dev);
 310
 311         adf_cleanup_etr_data(accel_dev);
 312         adf_dev_restore(accel_dev);
 313 }
 314 EXPORT_SYMBOL_GPL(adf_dev_shutdown);
 315
 316 int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
 317 {
 318         struct service_hndl *service;
 319         struct list_head *list_itr;
 320
 321         list_for_each(list_itr, &service_table) {
 322                 service = list_entry(list_itr, struct service_hndl, list);
 323                 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
 324                         dev_err(&GET_DEV(accel_dev),
 325                                 "Failed to restart service %s.\n",
 326                                 service->name);
 327         }
 328         return 0;
 329 }
 330
 331 int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
 332 {
 333         struct service_hndl *service;
 334         struct list_head *list_itr;
 335
 336         list_for_each(list_itr, &service_table) {
 337                 service = list_entry(list_itr, struct service_hndl, list);
 338                 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
 339                         dev_err(&GET_DEV(accel_dev),
 340                                 "Failed to restart service %s.\n",
 341                                 service->name);
 342         }
 343         return 0;
 344 }