drivers/crypto/intel/qat/qat_common/qat_crypto.c

   1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
   2 /* Copyright(c) 2014 - 2020 Intel Corporation */
   3 #include <linux/module.h>
   4 #include <linux/slab.h>
   5 #include "adf_accel_devices.h"
   6 #include "adf_common_drv.h"
   7 #include "adf_transport.h"
   8 #include "adf_cfg.h"
   9 #include "adf_cfg_strings.h"
  10 #include "adf_gen2_hw_data.h"
  11 #include "qat_crypto.h"
  12 #include "icp_qat_fw.h"
  13
  14 #define SEC ADF_KERNEL_SEC
  15
  16 static struct service_hndl qat_crypto;
  17
  18 void qat_crypto_put_instance(struct qat_crypto_instance *inst)
  19 {
  20         atomic_dec(&inst->refctr);
  21         adf_dev_put(inst->accel_dev);
  22 }
  23
  24 static int qat_crypto_free_instances(struct adf_accel_dev *accel_dev)
  25 {
  26         struct qat_crypto_instance *inst, *tmp;
  27         int i;
  28
  29         list_for_each_entry_safe(inst, tmp, &accel_dev->crypto_list, list) {
  30                 for (i = 0; i < atomic_read(&inst->refctr); i++)
  31                         qat_crypto_put_instance(inst);
  32
  33                 if (inst->sym_tx)
  34                         adf_remove_ring(inst->sym_tx);
  35
  36                 if (inst->sym_rx)
  37                         adf_remove_ring(inst->sym_rx);
  38
  39                 if (inst->pke_tx)
  40                         adf_remove_ring(inst->pke_tx);
  41
  42                 if (inst->pke_rx)
  43                         adf_remove_ring(inst->pke_rx);
  44
  45                 list_del(&inst->list);
  46                 kfree(inst);
  47         }
  48         return 0;
  49 }
  50
  51 struct qat_crypto_instance *qat_crypto_get_instance_node(int node)
  52 {
  53         struct adf_accel_dev *accel_dev = NULL, *tmp_dev;
  54         struct qat_crypto_instance *inst = NULL, *tmp_inst;
  55         unsigned long best = ~0;
  56
  57         list_for_each_entry(tmp_dev, adf_devmgr_get_head(), list) {
  58                 unsigned long ctr;
  59
  60                 if ((node == dev_to_node(&GET_DEV(tmp_dev)) ||
  61                      dev_to_node(&GET_DEV(tmp_dev)) < 0) &&
  62                     adf_dev_started(tmp_dev) &&
  63                     !list_empty(&tmp_dev->crypto_list)) {
  64                         ctr = atomic_read(&tmp_dev->ref_count);
  65                         if (best > ctr) {
  66                                 accel_dev = tmp_dev;
  67                                 best = ctr;
  68                         }
  69                 }
  70         }
  71
  72         if (!accel_dev) {
  73                 pr_debug_ratelimited("QAT: Could not find a device on node %d\n", node);
  74                 /* Get any started device */
  75                 list_for_each_entry(tmp_dev, adf_devmgr_get_head(), list) {
  76                         if (adf_dev_started(tmp_dev) &&
  77                             !list_empty(&tmp_dev->crypto_list)) {
  78                                 accel_dev = tmp_dev;
  79                                 break;
  80                         }
  81                 }
  82         }
  83
  84         if (!accel_dev)
  85                 return NULL;
  86
  87         best = ~0;
  88         list_for_each_entry(tmp_inst, &accel_dev->crypto_list, list) {
  89                 unsigned long ctr;
  90
  91                 ctr = atomic_read(&tmp_inst->refctr);
  92                 if (best > ctr) {
  93                         inst = tmp_inst;
  94                         best = ctr;
  95                 }
  96         }
  97         if (inst) {
  98                 if (adf_dev_get(accel_dev)) {
  99                         dev_err(&GET_DEV(accel_dev), "Could not increment dev refctr\n");
 100                         return NULL;
 101                 }
 102                 atomic_inc(&inst->refctr);
 103         }
 104         return inst;
 105 }
 106
 107 /**
 108  * qat_crypto_vf_dev_config()
 109  *     create dev config required to create crypto inst.
 110  *
 111  * @accel_dev: Pointer to acceleration device.
 112  *
 113  * Function creates device configuration required to create
 114  * asym, sym or, crypto instances
 115  *
 116  * Return: 0 on success, error code otherwise.
 117  */
 118 int qat_crypto_vf_dev_config(struct adf_accel_dev *accel_dev)
 119 {
 120         u16 ring_to_svc_map = GET_HW_DATA(accel_dev)->ring_to_svc_map;
 121
 122         if (ring_to_svc_map != ADF_GEN2_DEFAULT_RING_TO_SRV_MAP) {
 123                 dev_err(&GET_DEV(accel_dev),
 124                         "Unsupported ring/service mapping present on PF");
 125                 return -EFAULT;
 126         }
 127
 128         return GET_HW_DATA(accel_dev)->dev_config(accel_dev);
 129 }
 130
 131 static int qat_crypto_create_instances(struct adf_accel_dev *accel_dev)
 132 {
 133         unsigned long num_inst, num_msg_sym, num_msg_asym;
 134         char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
 135         char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
 136         unsigned long sym_bank, asym_bank;
 137         struct qat_crypto_instance *inst;
 138         int msg_size;
 139         int ret;
 140         int i;
 141
 142         INIT_LIST_HEAD(&accel_dev->crypto_list);
 143         ret = adf_cfg_get_param_value(accel_dev, SEC, ADF_NUM_CY, val);
 144         if (ret)
 145                 return ret;
 146
 147         ret = kstrtoul(val, 0, &num_inst);
 148         if (ret)
 149                 return ret;
 150
 151         for (i = 0; i < num_inst; i++) {
 152                 inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,
 153                                     dev_to_node(&GET_DEV(accel_dev)));
 154                 if (!inst) {
 155                         ret = -ENOMEM;
 156                         goto err;
 157                 }
 158
 159                 list_add_tail(&inst->list, &accel_dev->crypto_list);
 160                 inst->id = i;
 161                 atomic_set(&inst->refctr, 0);
 162                 inst->accel_dev = accel_dev;
 163
 164                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_BANK_NUM, i);
 165                 ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
 166                 if (ret)
 167                         goto err;
 168
 169                 ret = kstrtoul(val, 10, &sym_bank);
 170                 if (ret)
 171                         goto err;
 172
 173                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_BANK_NUM, i);
 174                 ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
 175                 if (ret)
 176                         goto err;
 177
 178                 ret = kstrtoul(val, 10, &asym_bank);
 179                 if (ret)
 180                         goto err;
 181
 182                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
 183                 ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
 184                 if (ret)
 185                         goto err;
 186
 187                 ret = kstrtoul(val, 10, &num_msg_sym);
 188                 if (ret)
 189                         goto err;
 190
 191                 num_msg_sym = num_msg_sym >> 1;
 192
 193                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
 194                 ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
 195                 if (ret)
 196                         goto err;
 197
 198                 ret = kstrtoul(val, 10, &num_msg_asym);
 199                 if (ret)
 200                         goto err;
 201                 num_msg_asym = num_msg_asym >> 1;
 202
 203                 msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;
 204                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
 205                 ret = adf_create_ring(accel_dev, SEC, sym_bank, num_msg_sym,
 206                                       msg_size, key, NULL, 0, &inst->sym_tx);
 207                 if (ret)
 208                         goto err;
 209
 210                 msg_size = msg_size >> 1;
 211                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
 212                 ret = adf_create_ring(accel_dev, SEC, asym_bank, num_msg_asym,
 213                                       msg_size, key, NULL, 0, &inst->pke_tx);
 214                 if (ret)
 215                         goto err;
 216
 217                 msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;
 218                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
 219                 ret = adf_create_ring(accel_dev, SEC, sym_bank, num_msg_sym,
 220                                       msg_size, key, qat_alg_callback, 0,
 221                                       &inst->sym_rx);
 222                 if (ret)
 223                         goto err;
 224
 225                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
 226                 ret = adf_create_ring(accel_dev, SEC, asym_bank, num_msg_asym,
 227                                       msg_size, key, qat_alg_asym_callback, 0,
 228                                       &inst->pke_rx);
 229                 if (ret)
 230                         goto err;
 231
 232                 INIT_LIST_HEAD(&inst->backlog.list);
 233                 spin_lock_init(&inst->backlog.lock);
 234         }
 235         return 0;
 236 err:
 237         qat_crypto_free_instances(accel_dev);
 238         return ret;
 239 }
 240
 241 static int qat_crypto_init(struct adf_accel_dev *accel_dev)
 242 {
 243         if (qat_crypto_create_instances(accel_dev))
 244                 return -EFAULT;
 245
 246         return 0;
 247 }
 248
 249 static int qat_crypto_shutdown(struct adf_accel_dev *accel_dev)
 250 {
 251         return qat_crypto_free_instances(accel_dev);
 252 }
 253
 254 static int qat_crypto_event_handler(struct adf_accel_dev *accel_dev,
 255                                     enum adf_event event)
 256 {
 257         int ret;
 258
 259         switch (event) {
 260         case ADF_EVENT_INIT:
 261                 ret = qat_crypto_init(accel_dev);
 262                 break;
 263         case ADF_EVENT_SHUTDOWN:
 264                 ret = qat_crypto_shutdown(accel_dev);
 265                 break;
 266         case ADF_EVENT_RESTARTING:
 267         case ADF_EVENT_RESTARTED:
 268         case ADF_EVENT_START:
 269         case ADF_EVENT_STOP:
 270         default:
 271                 ret = 0;
 272         }
 273         return ret;
 274 }
 275
 276 int qat_crypto_register(void)
 277 {
 278         memset(&qat_crypto, 0, sizeof(qat_crypto));
 279         qat_crypto.event_hld = qat_crypto_event_handler;
 280         qat_crypto.name = "qat_crypto";
 281         return adf_service_register(&qat_crypto);
 282 }
 283
 284 int qat_crypto_unregister(void)
 285 {
 286         return adf_service_unregister(&qat_crypto);
 287 }