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        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}
 137EXPORT_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 */
 149int 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}
 196EXPORT_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 */
 208void 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}
 250EXPORT_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 */
 259void 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}
 317EXPORT_SYMBOL_GPL(adf_dev_shutdown);
 318
 319int 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
 334int 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}
 348