text: /**
   * Routines supporting VMX instructions on the Power 8
   *
   * Copyright (C) 2015 International Business Machines Inc.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; version 2 only.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   *
   * Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/types.h>
  #include <linux/err.h>
  #include <linux/crypto.h>
  #include <asm/cputable.h>
  #include <crypto/internal/hash.h>
  
  extern struct shash_alg p8_ghash_alg;
  extern struct crypto_alg p8_aes_alg;
  extern struct crypto_alg p8_aes_cbc_alg;
  extern struct crypto_alg p8_aes_ctr_alg;
  static struct crypto_alg *algs[] = {
      &p8_aes_alg,
      &p8_aes_cbc_alg,
      &p8_aes_ctr_alg,
      NULL,
  };
  
  int __init p8_init(void)
  {
      int ret = 0;
      struct crypto_alg **alg_it;
  
      if (!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_VEC_CRYPTO))
          return -ENODEV;
  
      for (alg_it = algs; *alg_it; alg_it++) {
          ret = crypto_register_alg(*alg_it);
          printk(KERN_INFO "crypto_register_alg '%s' = %d\n",
                  (*alg_it)->cra_name, ret);
          if (ret) {
              for (alg_it--; alg_it >= algs; alg_it--)
                  crypto_unregister_alg(*alg_it);
              break;
          }
      }
      if (ret)
          return ret;
  
      ret = crypto_register_shash(&p8_ghash_alg);
      if (ret) {
          for (alg_it = algs; *alg_it; alg_it++)
              crypto_unregister_alg(*alg_it);
      }
      return ret;
  }
  
  void __exit p8_exit(void)
  {
      struct crypto_alg **alg_it;
  
      for (alg_it = algs; *alg_it; alg_it++) {
          printk(KERN_INFO "Removing '%s'\n", (*alg_it)->cra_name);
          crypto_unregister_alg(*alg_it);
      }
      crypto_unregister_shash(&p8_ghash_alg);
  }
  
  module_init(p8_init);
  module_exit(p8_exit);
  
  MODULE_AUTHOR("Marcelo Cerri<mhcerri@br.ibm.com>");
  MODULE_DESCRIPTION("IBM VMX cryptogaphic acceleration instructions support on Power 8");
  MODULE_LICENSE("GPL");
  MODULE_VERSION("1.0.0");
  
  