LXR linux/drivers/crypto/qat/qat_common/adf

   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
  11static LIST_HEAD(service_table);
  12static DEFINE_MUTEX(service_lock);
  13
  14static 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
  21int 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
  29static 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
  36int 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 */
  59int 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}
 134EXPORT_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 */
 146int 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}
 193EXPORT_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 */
 205void 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}
 247EXPORT_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 */
 256void 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}
 314EXPORT_SYMBOL_GPL(adf_dev_shutdown);
 315
 316int 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
 331int 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}
 345