drivers/s390/crypto/zcrypt_pcixcc.c

   1 /*
   2  *  linux/drivers/s390/crypto/zcrypt_pcixcc.c
   3  *
   4  *  zcrypt 2.1.0
   5  *
   6  *  Copyright (C)  2001, 2006 IBM Corporation
   7  *  Author(s): Robert Burroughs
   8  *             Eric Rossman (edrossma@us.ibm.com)
   9  *
  10  *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
  11  *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
  12  *                                Ralph Wuerthner <rwuerthn@de.ibm.com>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2, or (at your option)
  17  * any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/err.h>
  32 #include <linux/delay.h>
  33 #include <asm/atomic.h>
  34 #include <asm/uaccess.h>
  35
  36 #include "ap_bus.h"
  37 #include "zcrypt_api.h"
  38 #include "zcrypt_error.h"
  39 #include "zcrypt_pcicc.h"
  40 #include "zcrypt_pcixcc.h"
  41 #include "zcrypt_cca_key.h"
  42
  43 #define PCIXCC_MIN_MOD_SIZE      16     /*  128 bits    */
  44 #define PCIXCC_MIN_MOD_SIZE_OLD  64     /*  512 bits    */
  45 #define PCIXCC_MAX_MOD_SIZE     256     /* 2048 bits    */
  46
  47 #define PCIXCC_MCL2_SPEED_RATING        7870    /* FIXME: needs finetuning */
  48 #define PCIXCC_MCL3_SPEED_RATING        7870
  49 #define CEX2C_SPEED_RATING              8540
  50
  51 #define PCIXCC_MAX_ICA_MESSAGE_SIZE 0x77c  /* max size type6 v2 crt message */
  52 #define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply      */
  53
  54 #define PCIXCC_MAX_XCRB_MESSAGE_SIZE (12*1024)
  55 #define PCIXCC_MAX_XCRB_RESPONSE_SIZE PCIXCC_MAX_XCRB_MESSAGE_SIZE
  56 #define PCIXCC_MAX_XCRB_DATA_SIZE (11*1024)
  57 #define PCIXCC_MAX_XCRB_REPLY_SIZE (5*1024)
  58
  59 #define PCIXCC_MAX_RESPONSE_SIZE PCIXCC_MAX_XCRB_RESPONSE_SIZE
  60
  61 #define PCIXCC_CLEANUP_TIME     (15*HZ)
  62
  63 #define CEIL4(x) ((((x)+3)/4)*4)
  64
  65 struct response_type {
  66         struct completion work;
  67         int type;
  68 };
  69 #define PCIXCC_RESPONSE_TYPE_ICA  0
  70 #define PCIXCC_RESPONSE_TYPE_XCRB 1
  71
  72 static struct ap_device_id zcrypt_pcixcc_ids[] = {
  73         { AP_DEVICE(AP_DEVICE_TYPE_PCIXCC) },
  74         { AP_DEVICE(AP_DEVICE_TYPE_CEX2C) },
  75         { AP_DEVICE(AP_DEVICE_TYPE_CEX2C2) },
  76         { /* end of list */ },
  77 };
  78
  79 #ifndef CONFIG_ZCRYPT_MONOLITHIC
  80 MODULE_DEVICE_TABLE(ap, zcrypt_pcixcc_ids);
  81 MODULE_AUTHOR("IBM Corporation");
  82 MODULE_DESCRIPTION("PCIXCC Cryptographic Coprocessor device driver, "
  83                    "Copyright 2001, 2006 IBM Corporation");
  84 MODULE_LICENSE("GPL");
  85 #endif
  86
  87 static int zcrypt_pcixcc_probe(struct ap_device *ap_dev);
  88 static void zcrypt_pcixcc_remove(struct ap_device *ap_dev);
  89 static void zcrypt_pcixcc_receive(struct ap_device *, struct ap_message *,
  90                                  struct ap_message *);
  91
  92 static struct ap_driver zcrypt_pcixcc_driver = {
  93         .probe = zcrypt_pcixcc_probe,
  94         .remove = zcrypt_pcixcc_remove,
  95         .receive = zcrypt_pcixcc_receive,
  96         .ids = zcrypt_pcixcc_ids,
  97         .request_timeout = PCIXCC_CLEANUP_TIME,
  98 };
  99
 100 /**
 101  * The following is used to initialize the CPRBX passed to the PCIXCC/CEX2C
 102  * card in a type6 message. The 3 fields that must be filled in at execution
 103  * time are  req_parml, rpl_parml and usage_domain.
 104  * Everything about this interface is ascii/big-endian, since the
 105  * device does *not* have 'Intel inside'.
 106  *
 107  * The CPRBX is followed immediately by the parm block.
 108  * The parm block contains:
 109  * - function code ('PD' 0x5044 or 'PK' 0x504B)
 110  * - rule block (one of:)
 111  *   + 0x000A 'PKCS-1.2' (MCL2 'PD')
 112  *   + 0x000A 'ZERO-PAD' (MCL2 'PK')
 113  *   + 0x000A 'ZERO-PAD' (MCL3 'PD' or CEX2C 'PD')
 114  *   + 0x000A 'MRP     ' (MCL3 'PK' or CEX2C 'PK')
 115  * - VUD block
 116  */
 117 static struct CPRBX static_cprbx = {
 118         .cprb_len       =  0x00DC,
 119         .cprb_ver_id    =  0x02,
 120         .func_id        = {0x54,0x32},
 121 };
 122
 123 /**
 124  * Convert a ICAMEX message to a type6 MEX message.
 125  *
 126  * @zdev: crypto device pointer
 127  * @ap_msg: pointer to AP message
 128  * @mex: pointer to user input data
 129  *
 130  * Returns 0 on success or -EFAULT.
 131  */
 132 static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_device *zdev,
 133                                        struct ap_message *ap_msg,
 134                                        struct ica_rsa_modexpo *mex)
 135 {
 136         static struct type6_hdr static_type6_hdrX = {
 137                 .type           =  0x06,
 138                 .offset1        =  0x00000058,
 139                 .agent_id       = {'C','A',},
 140                 .function_code  = {'P','K'},
 141         };
 142         static struct function_and_rules_block static_pke_fnr = {
 143                 .function_code  = {'P','K'},
 144                 .ulen           = 10,
 145                 .only_rule      = {'M','R','P',' ',' ',' ',' ',' '}
 146         };
 147         static struct function_and_rules_block static_pke_fnr_MCL2 = {
 148                 .function_code  = {'P','K'},
 149                 .ulen           = 10,
 150                 .only_rule      = {'Z','E','R','O','-','P','A','D'}
 151         };
 152         struct {
 153                 struct type6_hdr hdr;
 154                 struct CPRBX cprbx;
 155                 struct function_and_rules_block fr;
 156                 unsigned short length;
 157                 char text[0];
 158         } __attribute__((packed)) *msg = ap_msg->message;
 159         int size;
 160
 161         /* VUD.ciphertext */
 162         msg->length = mex->inputdatalength + 2;
 163         if (copy_from_user(msg->text, mex->inputdata, mex->inputdatalength))
 164                 return -EFAULT;
 165
 166         /* Set up key which is located after the variable length text. */
 167         size = zcrypt_type6_mex_key_en(mex, msg->text+mex->inputdatalength, 1);
 168         if (size < 0)
 169                 return size;
 170         size += sizeof(*msg) + mex->inputdatalength;
 171
 172         /* message header, cprbx and f&r */
 173         msg->hdr = static_type6_hdrX;
 174         msg->hdr.ToCardLen1 = size - sizeof(msg->hdr);
 175         msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);
 176
 177         msg->cprbx = static_cprbx;
 178         msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
 179         msg->cprbx.rpl_msgbl = msg->hdr.FromCardLen1;
 180
 181         msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
 182                 static_pke_fnr_MCL2 : static_pke_fnr;
 183
 184         msg->cprbx.req_parml = size - sizeof(msg->hdr) - sizeof(msg->cprbx);
 185
 186         ap_msg->length = size;
 187         return 0;
 188 }
 189
 190 /**
 191  * Convert a ICACRT message to a type6 CRT message.
 192  *
 193  * @zdev: crypto device pointer
 194  * @ap_msg: pointer to AP message
 195  * @crt: pointer to user input data
 196  *
 197  * Returns 0 on success or -EFAULT.
 198  */
 199 static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_device *zdev,
 200                                        struct ap_message *ap_msg,
 201                                        struct ica_rsa_modexpo_crt *crt)
 202 {
 203         static struct type6_hdr static_type6_hdrX = {
 204                 .type           =  0x06,
 205                 .offset1        =  0x00000058,
 206                 .agent_id       = {'C','A',},
 207                 .function_code  = {'P','D'},
 208         };
 209         static struct function_and_rules_block static_pkd_fnr = {
 210                 .function_code  = {'P','D'},
 211                 .ulen           = 10,
 212                 .only_rule      = {'Z','E','R','O','-','P','A','D'}
 213         };
 214
 215         static struct function_and_rules_block static_pkd_fnr_MCL2 = {
 216                 .function_code  = {'P','D'},
 217                 .ulen           = 10,
 218                 .only_rule      = {'P','K','C','S','-','1','.','2'}
 219         };
 220         struct {
 221                 struct type6_hdr hdr;
 222                 struct CPRBX cprbx;
 223                 struct function_and_rules_block fr;
 224                 unsigned short length;
 225                 char text[0];
 226         } __attribute__((packed)) *msg = ap_msg->message;
 227         int size;
 228
 229         /* VUD.ciphertext */
 230         msg->length = crt->inputdatalength + 2;
 231         if (copy_from_user(msg->text, crt->inputdata, crt->inputdatalength))
 232                 return -EFAULT;
 233
 234         /* Set up key which is located after the variable length text. */
 235         size = zcrypt_type6_crt_key(crt, msg->text + crt->inputdatalength, 1);
 236         if (size < 0)
 237                 return size;
 238         size += sizeof(*msg) + crt->inputdatalength;    /* total size of msg */
 239
 240         /* message header, cprbx and f&r */
 241         msg->hdr = static_type6_hdrX;
 242         msg->hdr.ToCardLen1 = size -  sizeof(msg->hdr);
 243         msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);
 244
 245         msg->cprbx = static_cprbx;
 246         msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
 247         msg->cprbx.req_parml = msg->cprbx.rpl_msgbl =
 248                 size - sizeof(msg->hdr) - sizeof(msg->cprbx);
 249
 250         msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
 251                 static_pkd_fnr_MCL2 : static_pkd_fnr;
 252
 253         ap_msg->length = size;
 254         return 0;
 255 }
 256
 257 /**
 258  * Convert a XCRB message to a type6 CPRB message.
 259  *
 260  * @zdev: crypto device pointer
 261  * @ap_msg: pointer to AP message
 262  * @xcRB: pointer to user input data
 263  *
 264  * Returns 0 on success or -EFAULT.
 265  */
 266 struct type86_fmt2_msg {
 267         struct type86_hdr hdr;
 268         struct type86_fmt2_ext fmt2;
 269 } __attribute__((packed));
 270
 271 static int XCRB_msg_to_type6CPRB_msgX(struct zcrypt_device *zdev,
 272                                        struct ap_message *ap_msg,
 273                                        struct ica_xcRB *xcRB)
 274 {
 275         static struct type6_hdr static_type6_hdrX = {
 276                 .type           =  0x06,
 277                 .offset1        =  0x00000058,
 278         };
 279         struct {
 280                 struct type6_hdr hdr;
 281                 struct CPRBX cprbx;
 282         } __attribute__((packed)) *msg = ap_msg->message;
 283
 284         int rcblen = CEIL4(xcRB->request_control_blk_length);
 285         int replylen;
 286         char *req_data = ap_msg->message + sizeof(struct type6_hdr) + rcblen;
 287         char *function_code;
 288
 289         /* length checks */
 290         ap_msg->length = sizeof(struct type6_hdr) +
 291                 CEIL4(xcRB->request_control_blk_length) +
 292                 xcRB->request_data_length;
 293         if (ap_msg->length > PCIXCC_MAX_XCRB_MESSAGE_SIZE)
 294                 return -EFAULT;
 295         if (CEIL4(xcRB->reply_control_blk_length) > PCIXCC_MAX_XCRB_REPLY_SIZE)
 296                 return -EFAULT;
 297         if (CEIL4(xcRB->reply_data_length) > PCIXCC_MAX_XCRB_DATA_SIZE)
 298                 return -EFAULT;
 299         replylen = CEIL4(xcRB->reply_control_blk_length) +
 300                 CEIL4(xcRB->reply_data_length) +
 301                 sizeof(struct type86_fmt2_msg);
 302         if (replylen > PCIXCC_MAX_XCRB_RESPONSE_SIZE) {
 303                 xcRB->reply_control_blk_length = PCIXCC_MAX_XCRB_RESPONSE_SIZE -
 304                         (sizeof(struct type86_fmt2_msg) +
 305                             CEIL4(xcRB->reply_data_length));
 306         }
 307
 308         /* prepare type6 header */
 309         msg->hdr = static_type6_hdrX;
 310         memcpy(msg->hdr.agent_id , &(xcRB->agent_ID), sizeof(xcRB->agent_ID));
 311         msg->hdr.ToCardLen1 = xcRB->request_control_blk_length;
 312         if (xcRB->request_data_length) {
 313                 msg->hdr.offset2 = msg->hdr.offset1 + rcblen;
 314                 msg->hdr.ToCardLen2 = xcRB->request_data_length;
 315         }
 316         msg->hdr.FromCardLen1 = xcRB->reply_control_blk_length;
 317         msg->hdr.FromCardLen2 = xcRB->reply_data_length;
 318
 319         /* prepare CPRB */
 320         if (copy_from_user(&(msg->cprbx), xcRB->request_control_blk_addr,
 321                     xcRB->request_control_blk_length))
 322                 return -EFAULT;
 323         if (msg->cprbx.cprb_len + sizeof(msg->hdr.function_code) >
 324             xcRB->request_control_blk_length)
 325                 return -EFAULT;
 326         function_code = ((unsigned char *)&msg->cprbx) + msg->cprbx.cprb_len;
 327         memcpy(msg->hdr.function_code, function_code, sizeof(msg->hdr.function_code));
 328
 329         /* copy data block */
 330         if (xcRB->request_data_length &&
 331             copy_from_user(req_data, xcRB->request_data_address,
 332                 xcRB->request_data_length))
 333                 return -EFAULT;
 334         return 0;
 335 }
 336
 337 /**
 338  * Prepare a type6 CPRB message for random number generation
 339  *
 340  * @ap_dev: AP device pointer
 341  * @ap_msg: pointer to AP message
 342  */
 343 static void rng_type6CPRB_msgX(struct ap_device *ap_dev,
 344                                struct ap_message *ap_msg,
 345                                unsigned random_number_length)
 346 {
 347         struct {
 348                 struct type6_hdr hdr;
 349                 struct CPRBX cprbx;
 350                 char function_code[2];
 351                 short int rule_length;
 352                 char rule[8];
 353                 short int verb_length;
 354                 short int key_length;
 355         } __attribute__((packed)) *msg = ap_msg->message;
 356         static struct type6_hdr static_type6_hdrX = {
 357                 .type           = 0x06,
 358                 .offset1        = 0x00000058,
 359                 .agent_id       = {'C', 'A'},
 360                 .function_code  = {'R', 'L'},
 361                 .ToCardLen1     = sizeof *msg - sizeof(msg->hdr),
 362                 .FromCardLen1   = sizeof *msg - sizeof(msg->hdr),
 363         };
 364         static struct CPRBX static_cprbx = {
 365                 .cprb_len       = 0x00dc,
 366                 .cprb_ver_id    = 0x02,
 367                 .func_id        = {0x54, 0x32},
 368                 .req_parml      = sizeof *msg - sizeof(msg->hdr) -
 369                                   sizeof(msg->cprbx),
 370                 .rpl_msgbl      = sizeof *msg - sizeof(msg->hdr),
 371         };
 372
 373         msg->hdr = static_type6_hdrX;
 374         msg->hdr.FromCardLen2 = random_number_length,
 375         msg->cprbx = static_cprbx;
 376         msg->cprbx.rpl_datal = random_number_length,
 377         msg->cprbx.domain = AP_QID_QUEUE(ap_dev->qid);
 378         memcpy(msg->function_code, msg->hdr.function_code, 0x02);
 379         msg->rule_length = 0x0a;
 380         memcpy(msg->rule, "RANDOM  ", 8);
 381         msg->verb_length = 0x02;
 382         msg->key_length = 0x02;
 383         ap_msg->length = sizeof *msg;
 384 }
 385
 386 /**
 387  * Copy results from a type 86 ICA reply message back to user space.
 388  *
 389  * @zdev: crypto device pointer
 390  * @reply: reply AP message.
 391  * @data: pointer to user output data
 392  * @length: size of user output data
 393  *
 394  * Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
 395  */
 396 struct type86x_reply {
 397         struct type86_hdr hdr;
 398         struct type86_fmt2_ext fmt2;
 399         struct CPRBX cprbx;
 400         unsigned char pad[4];   /* 4 byte function code/rules block ? */
 401         unsigned short length;
 402         char text[0];
 403 } __attribute__((packed));
 404
 405 static int convert_type86_ica(struct zcrypt_device *zdev,
 406                           struct ap_message *reply,
 407                           char __user *outputdata,
 408                           unsigned int outputdatalength)
 409 {
 410         static unsigned char static_pad[] = {
 411                 0x00,0x02,
 412                 0x1B,0x7B,0x5D,0xB5,0x75,0x01,0x3D,0xFD,
 413                 0x8D,0xD1,0xC7,0x03,0x2D,0x09,0x23,0x57,
 414                 0x89,0x49,0xB9,0x3F,0xBB,0x99,0x41,0x5B,
 415                 0x75,0x21,0x7B,0x9D,0x3B,0x6B,0x51,0x39,
 416                 0xBB,0x0D,0x35,0xB9,0x89,0x0F,0x93,0xA5,
 417                 0x0B,0x47,0xF1,0xD3,0xBB,0xCB,0xF1,0x9D,
 418                 0x23,0x73,0x71,0xFF,0xF3,0xF5,0x45,0xFB,
 419                 0x61,0x29,0x23,0xFD,0xF1,0x29,0x3F,0x7F,
 420                 0x17,0xB7,0x1B,0xA9,0x19,0xBD,0x57,0xA9,
 421                 0xD7,0x95,0xA3,0xCB,0xED,0x1D,0xDB,0x45,
 422                 0x7D,0x11,0xD1,0x51,0x1B,0xED,0x71,0xE9,
 423                 0xB1,0xD1,0xAB,0xAB,0x21,0x2B,0x1B,0x9F,
 424                 0x3B,0x9F,0xF7,0xF7,0xBD,0x63,0xEB,0xAD,
 425                 0xDF,0xB3,0x6F,0x5B,0xDB,0x8D,0xA9,0x5D,
 426                 0xE3,0x7D,0x77,0x49,0x47,0xF5,0xA7,0xFD,
 427                 0xAB,0x2F,0x27,0x35,0x77,0xD3,0x49,0xC9,
 428                 0x09,0xEB,0xB1,0xF9,0xBF,0x4B,0xCB,0x2B,
 429                 0xEB,0xEB,0x05,0xFF,0x7D,0xC7,0x91,0x8B,
 430                 0x09,0x83,0xB9,0xB9,0x69,0x33,0x39,0x6B,
 431                 0x79,0x75,0x19,0xBF,0xBB,0x07,0x1D,0xBD,
 432                 0x29,0xBF,0x39,0x95,0x93,0x1D,0x35,0xC7,
 433                 0xC9,0x4D,0xE5,0x97,0x0B,0x43,0x9B,0xF1,
 434                 0x16,0x93,0x03,0x1F,0xA5,0xFB,0xDB,0xF3,
 435                 0x27,0x4F,0x27,0x61,0x05,0x1F,0xB9,0x23,
 436                 0x2F,0xC3,0x81,0xA9,0x23,0x71,0x55,0x55,
 437                 0xEB,0xED,0x41,0xE5,0xF3,0x11,0xF1,0x43,
 438                 0x69,0x03,0xBD,0x0B,0x37,0x0F,0x51,0x8F,
 439                 0x0B,0xB5,0x89,0x5B,0x67,0xA9,0xD9,0x4F,
 440                 0x01,0xF9,0x21,0x77,0x37,0x73,0x79,0xC5,
 441                 0x7F,0x51,0xC1,0xCF,0x97,0xA1,0x75,0xAD,
 442                 0x35,0x9D,0xD3,0xD3,0xA7,0x9D,0x5D,0x41,
 443                 0x6F,0x65,0x1B,0xCF,0xA9,0x87,0x91,0x09
 444         };
 445         struct type86x_reply *msg = reply->message;
 446         unsigned short service_rc, service_rs;
 447         unsigned int reply_len, pad_len;
 448         char *data;
 449
 450         service_rc = msg->cprbx.ccp_rtcode;
 451         if (unlikely(service_rc != 0)) {
 452                 service_rs = msg->cprbx.ccp_rscode;
 453                 if (service_rc == 8 && service_rs == 66)
 454                         return -EINVAL;
 455                 if (service_rc == 8 && service_rs == 65)
 456                         return -EINVAL;
 457                 if (service_rc == 8 && service_rs == 770)
 458                         return -EINVAL;
 459                 if (service_rc == 8 && service_rs == 783) {
 460                         zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
 461                         return -EAGAIN;
 462                 }
 463                 if (service_rc == 12 && service_rs == 769)
 464                         return -EINVAL;
 465                 zdev->online = 0;
 466                 return -EAGAIN; /* repeat the request on a different device. */
 467         }
 468         data = msg->text;
 469         reply_len = msg->length - 2;
 470         if (reply_len > outputdatalength)
 471                 return -EINVAL;
 472         /*
 473          * For all encipher requests, the length of the ciphertext (reply_len)
 474          * will always equal the modulus length. For MEX decipher requests
 475          * the output needs to get padded. Minimum pad size is 10.
 476          *
 477          * Currently, the cases where padding will be added is for:
 478          * - PCIXCC_MCL2 using a CRT form token (since PKD didn't support
 479          *   ZERO-PAD and CRT is only supported for PKD requests)
 480          * - PCICC, always
 481          */
 482         pad_len = outputdatalength - reply_len;
 483         if (pad_len > 0) {
 484                 if (pad_len < 10)
 485                         return -EINVAL;
 486                 /* 'restore' padding left in the PCICC/PCIXCC card. */
 487                 if (copy_to_user(outputdata, static_pad, pad_len - 1))
 488                         return -EFAULT;
 489                 if (put_user(0, outputdata + pad_len - 1))
 490                         return -EFAULT;
 491         }
 492         /* Copy the crypto response to user space. */
 493         if (copy_to_user(outputdata + pad_len, data, reply_len))
 494                 return -EFAULT;
 495         return 0;
 496 }
 497
 498 /**
 499  * Copy results from a type 86 XCRB reply message back to user space.
 500  *
 501  * @zdev: crypto device pointer
 502  * @reply: reply AP message.
 503  * @xcRB: pointer to XCRB
 504  *
 505  * Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
 506  */
 507 static int convert_type86_xcrb(struct zcrypt_device *zdev,
 508                                struct ap_message *reply,
 509                                struct ica_xcRB *xcRB)
 510 {
 511         struct type86_fmt2_msg *msg = reply->message;
 512         char *data = reply->message;
 513
 514         /* Copy CPRB to user */
 515         if (copy_to_user(xcRB->reply_control_blk_addr,
 516                 data + msg->fmt2.offset1, msg->fmt2.count1))
 517                 return -EFAULT;
 518         xcRB->reply_control_blk_length = msg->fmt2.count1;
 519
 520         /* Copy data buffer to user */
 521         if (msg->fmt2.count2)
 522                 if (copy_to_user(xcRB->reply_data_addr,
 523                         data + msg->fmt2.offset2, msg->fmt2.count2))
 524                         return -EFAULT;
 525         xcRB->reply_data_length = msg->fmt2.count2;
 526         return 0;
 527 }
 528
 529 static int convert_type86_rng(struct zcrypt_device *zdev,
 530                           struct ap_message *reply,
 531                           char *buffer)
 532 {
 533         struct {
 534                 struct type86_hdr hdr;
 535                 struct type86_fmt2_ext fmt2;
 536                 struct CPRBX cprbx;
 537         } __attribute__((packed)) *msg = reply->message;
 538         char *data = reply->message;
 539
 540         if (msg->cprbx.ccp_rtcode != 0 || msg->cprbx.ccp_rscode != 0)
 541                 return -EINVAL;
 542         memcpy(buffer, data + msg->fmt2.offset2, msg->fmt2.count2);
 543         return msg->fmt2.count2;
 544 }
 545
 546 static int convert_response_ica(struct zcrypt_device *zdev,
 547                             struct ap_message *reply,
 548                             char __user *outputdata,
 549                             unsigned int outputdatalength)
 550 {
 551         struct type86x_reply *msg = reply->message;
 552
 553         /* Response type byte is the second byte in the response. */
 554         switch (((unsigned char *) reply->message)[1]) {
 555         case TYPE82_RSP_CODE:
 556         case TYPE88_RSP_CODE:
 557                 return convert_error(zdev, reply);
 558         case TYPE86_RSP_CODE:
 559                 if (msg->hdr.reply_code)
 560                         return convert_error(zdev, reply);
 561                 if (msg->cprbx.cprb_ver_id == 0x02)
 562                         return convert_type86_ica(zdev, reply,
 563                                                   outputdata, outputdatalength);
 564                 /* no break, incorrect cprb version is an unknown response */
 565         default: /* Unknown response type, this should NEVER EVER happen */
 566                 zdev->online = 0;
 567                 return -EAGAIN; /* repeat the request on a different device. */
 568         }
 569 }
 570
 571 static int convert_response_xcrb(struct zcrypt_device *zdev,
 572                             struct ap_message *reply,
 573                             struct ica_xcRB *xcRB)
 574 {
 575         struct type86x_reply *msg = reply->message;
 576
 577         /* Response type byte is the second byte in the response. */
 578         switch (((unsigned char *) reply->message)[1]) {
 579         case TYPE82_RSP_CODE:
 580         case TYPE88_RSP_CODE:
 581                 xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
 582                 return convert_error(zdev, reply);
 583         case TYPE86_RSP_CODE:
 584                 if (msg->hdr.reply_code) {
 585                         memcpy(&(xcRB->status), msg->fmt2.apfs, sizeof(u32));
 586                         return convert_error(zdev, reply);
 587                 }
 588                 if (msg->cprbx.cprb_ver_id == 0x02)
 589                         return convert_type86_xcrb(zdev, reply, xcRB);
 590                 /* no break, incorrect cprb version is an unknown response */
 591         default: /* Unknown response type, this should NEVER EVER happen */
 592                 xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
 593                 zdev->online = 0;
 594                 return -EAGAIN; /* repeat the request on a different device. */
 595         }
 596 }
 597
 598 static int convert_response_rng(struct zcrypt_device *zdev,
 599                                  struct ap_message *reply,
 600                                  char *data)
 601 {
 602         struct type86x_reply *msg = reply->message;
 603
 604         switch (msg->hdr.type) {
 605         case TYPE82_RSP_CODE:
 606         case TYPE88_RSP_CODE:
 607                 return -EINVAL;
 608         case TYPE86_RSP_CODE:
 609                 if (msg->hdr.reply_code)
 610                         return -EINVAL;
 611                 if (msg->cprbx.cprb_ver_id == 0x02)
 612                         return convert_type86_rng(zdev, reply, data);
 613                 /* no break, incorrect cprb version is an unknown response */
 614         default: /* Unknown response type, this should NEVER EVER happen */
 615                 zdev->online = 0;
 616                 return -EAGAIN; /* repeat the request on a different device. */
 617         }
 618 }
 619
 620 /**
 621  * This function is called from the AP bus code after a crypto request
 622  * "msg" has finished with the reply message "reply".
 623  * It is called from tasklet context.
 624  * @ap_dev: pointer to the AP device
 625  * @msg: pointer to the AP message
 626  * @reply: pointer to the AP reply message
 627  */
 628 static void zcrypt_pcixcc_receive(struct ap_device *ap_dev,
 629                                   struct ap_message *msg,
 630                                   struct ap_message *reply)
 631 {
 632         static struct error_hdr error_reply = {
 633                 .type = TYPE82_RSP_CODE,
 634                 .reply_code = REP82_ERROR_MACHINE_FAILURE,
 635         };
 636         struct response_type *resp_type =
 637                 (struct response_type *) msg->private;
 638         struct type86x_reply *t86r;
 639         int length;
 640
 641         /* Copy the reply message to the request message buffer. */
 642         if (IS_ERR(reply)) {
 643                 memcpy(msg->message, &error_reply, sizeof(error_reply));
 644                 goto out;
 645         }
 646         t86r = reply->message;
 647         if (t86r->hdr.type == TYPE86_RSP_CODE &&
 648                  t86r->cprbx.cprb_ver_id == 0x02) {
 649                 switch (resp_type->type) {
 650                 case PCIXCC_RESPONSE_TYPE_ICA:
 651                         length = sizeof(struct type86x_reply)
 652                                 + t86r->length - 2;
 653                         length = min(PCIXCC_MAX_ICA_RESPONSE_SIZE, length);
 654                         memcpy(msg->message, reply->message, length);
 655                         break;
 656                 case PCIXCC_RESPONSE_TYPE_XCRB:
 657                         length = t86r->fmt2.offset2 + t86r->fmt2.count2;
 658                         length = min(PCIXCC_MAX_XCRB_RESPONSE_SIZE, length);
 659                         memcpy(msg->message, reply->message, length);
 660                         break;
 661                 default:
 662                         memcpy(msg->message, &error_reply, sizeof error_reply);
 663                 }
 664         } else
 665                 memcpy(msg->message, reply->message, sizeof error_reply);
 666 out:
 667         complete(&(resp_type->work));
 668 }
 669
 670 static atomic_t zcrypt_step = ATOMIC_INIT(0);
 671
 672 /**
 673  * The request distributor calls this function if it picked the PCIXCC/CEX2C
 674  * device to handle a modexpo request.
 675  * @zdev: pointer to zcrypt_device structure that identifies the
 676  *        PCIXCC/CEX2C device to the request distributor
 677  * @mex: pointer to the modexpo request buffer
 678  */
 679 static long zcrypt_pcixcc_modexpo(struct zcrypt_device *zdev,
 680                                   struct ica_rsa_modexpo *mex)
 681 {
 682         struct ap_message ap_msg;
 683         struct response_type resp_type = {
 684                 .type = PCIXCC_RESPONSE_TYPE_ICA,
 685         };
 686         int rc;
 687
 688         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
 689         if (!ap_msg.message)
 690                 return -ENOMEM;
 691         ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
 692                                 atomic_inc_return(&zcrypt_step);
 693         ap_msg.private = &resp_type;
 694         rc = ICAMEX_msg_to_type6MEX_msgX(zdev, &ap_msg, mex);
 695         if (rc)
 696                 goto out_free;
 697         init_completion(&resp_type.work);
 698         ap_queue_message(zdev->ap_dev, &ap_msg);
 699         rc = wait_for_completion_interruptible(&resp_type.work);
 700         if (rc == 0)
 701                 rc = convert_response_ica(zdev, &ap_msg, mex->outputdata,
 702                                           mex->outputdatalength);
 703         else
 704                 /* Signal pending. */
 705                 ap_cancel_message(zdev->ap_dev, &ap_msg);
 706 out_free:
 707         free_page((unsigned long) ap_msg.message);
 708         return rc;
 709 }
 710
 711 /**
 712  * The request distributor calls this function if it picked the PCIXCC/CEX2C
 713  * device to handle a modexpo_crt request.
 714  * @zdev: pointer to zcrypt_device structure that identifies the
 715  *        PCIXCC/CEX2C device to the request distributor
 716  * @crt: pointer to the modexpoc_crt request buffer
 717  */
 718 static long zcrypt_pcixcc_modexpo_crt(struct zcrypt_device *zdev,
 719                                       struct ica_rsa_modexpo_crt *crt)
 720 {
 721         struct ap_message ap_msg;
 722         struct response_type resp_type = {
 723                 .type = PCIXCC_RESPONSE_TYPE_ICA,
 724         };
 725         int rc;
 726
 727         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
 728         if (!ap_msg.message)
 729                 return -ENOMEM;
 730         ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
 731                                 atomic_inc_return(&zcrypt_step);
 732         ap_msg.private = &resp_type;
 733         rc = ICACRT_msg_to_type6CRT_msgX(zdev, &ap_msg, crt);
 734         if (rc)
 735                 goto out_free;
 736         init_completion(&resp_type.work);
 737         ap_queue_message(zdev->ap_dev, &ap_msg);
 738         rc = wait_for_completion_interruptible(&resp_type.work);
 739         if (rc == 0)
 740                 rc = convert_response_ica(zdev, &ap_msg, crt->outputdata,
 741                                           crt->outputdatalength);
 742         else
 743                 /* Signal pending. */
 744                 ap_cancel_message(zdev->ap_dev, &ap_msg);
 745 out_free:
 746         free_page((unsigned long) ap_msg.message);
 747         return rc;
 748 }
 749
 750 /**
 751  * The request distributor calls this function if it picked the PCIXCC/CEX2C
 752  * device to handle a send_cprb request.
 753  * @zdev: pointer to zcrypt_device structure that identifies the
 754  *        PCIXCC/CEX2C device to the request distributor
 755  * @xcRB: pointer to the send_cprb request buffer
 756  */
 757 static long zcrypt_pcixcc_send_cprb(struct zcrypt_device *zdev,
 758                                     struct ica_xcRB *xcRB)
 759 {
 760         struct ap_message ap_msg;
 761         struct response_type resp_type = {
 762                 .type = PCIXCC_RESPONSE_TYPE_XCRB,
 763         };
 764         int rc;
 765
 766         ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
 767         if (!ap_msg.message)
 768                 return -ENOMEM;
 769         ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
 770                                 atomic_inc_return(&zcrypt_step);
 771         ap_msg.private = &resp_type;
 772         rc = XCRB_msg_to_type6CPRB_msgX(zdev, &ap_msg, xcRB);
 773         if (rc)
 774                 goto out_free;
 775         init_completion(&resp_type.work);
 776         ap_queue_message(zdev->ap_dev, &ap_msg);
 777         rc = wait_for_completion_interruptible(&resp_type.work);
 778         if (rc == 0)
 779                 rc = convert_response_xcrb(zdev, &ap_msg, xcRB);
 780         else
 781                 /* Signal pending. */
 782                 ap_cancel_message(zdev->ap_dev, &ap_msg);
 783 out_free:
 784         kzfree(ap_msg.message);
 785         return rc;
 786 }
 787
 788 /**
 789  * The request distributor calls this function if it picked the PCIXCC/CEX2C
 790  * device to generate random data.
 791  * @zdev: pointer to zcrypt_device structure that identifies the
 792  *        PCIXCC/CEX2C device to the request distributor
 793  * @buffer: pointer to a memory page to return random data
 794  */
 795
 796 static long zcrypt_pcixcc_rng(struct zcrypt_device *zdev,
 797                                     char *buffer)
 798 {
 799         struct ap_message ap_msg;
 800         struct response_type resp_type = {
 801                 .type = PCIXCC_RESPONSE_TYPE_XCRB,
 802         };
 803         int rc;
 804
 805         ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
 806         if (!ap_msg.message)
 807                 return -ENOMEM;
 808         ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
 809                                 atomic_inc_return(&zcrypt_step);
 810         ap_msg.private = &resp_type;
 811         rng_type6CPRB_msgX(zdev->ap_dev, &ap_msg, ZCRYPT_RNG_BUFFER_SIZE);
 812         init_completion(&resp_type.work);
 813         ap_queue_message(zdev->ap_dev, &ap_msg);
 814         rc = wait_for_completion_interruptible(&resp_type.work);
 815         if (rc == 0)
 816                 rc = convert_response_rng(zdev, &ap_msg, buffer);
 817         else
 818                 /* Signal pending. */
 819                 ap_cancel_message(zdev->ap_dev, &ap_msg);
 820         kfree(ap_msg.message);
 821         return rc;
 822 }
 823
 824 /**
 825  * The crypto operations for a PCIXCC/CEX2C card.
 826  */
 827 static struct zcrypt_ops zcrypt_pcixcc_ops = {
 828         .rsa_modexpo = zcrypt_pcixcc_modexpo,
 829         .rsa_modexpo_crt = zcrypt_pcixcc_modexpo_crt,
 830         .send_cprb = zcrypt_pcixcc_send_cprb,
 831 };
 832
 833 static struct zcrypt_ops zcrypt_pcixcc_with_rng_ops = {
 834         .rsa_modexpo = zcrypt_pcixcc_modexpo,
 835         .rsa_modexpo_crt = zcrypt_pcixcc_modexpo_crt,
 836         .send_cprb = zcrypt_pcixcc_send_cprb,
 837         .rng = zcrypt_pcixcc_rng,
 838 };
 839
 840 /**
 841  * Micro-code detection function. Its sends a message to a pcixcc card
 842  * to find out the microcode level.
 843  * @ap_dev: pointer to the AP device.
 844  */
 845 static int zcrypt_pcixcc_mcl(struct ap_device *ap_dev)
 846 {
 847         static unsigned char msg[] = {
 848                 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,
 849                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 850                 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00,
 851                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 852                 0x43,0x41,0x00,0x00,0x00,0x00,0x00,0x00,
 853                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 854                 0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x00,
 855                 0x00,0x00,0x01,0xC4,0x00,0x00,0x00,0x00,
 856                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 857                 0x00,0x00,0x07,0x24,0x00,0x00,0x00,0x00,
 858                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 859                 0x00,0xDC,0x02,0x00,0x00,0x00,0x54,0x32,
 860                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE8,
 861                 0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x24,
 862                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 863                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 864                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 865                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 866                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 867                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 868                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 869                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 870                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 871                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 872                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 873                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 874                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 875                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 876                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 877                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 878                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 879                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 880                 0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
 881                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 882                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 883                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 884                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 885                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 886                 0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x0A,
 887                 0x4D,0x52,0x50,0x20,0x20,0x20,0x20,0x20,
 888                 0x00,0x42,0x00,0x01,0x02,0x03,0x04,0x05,
 889                 0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,
 890                 0x0E,0x0F,0x00,0x11,0x22,0x33,0x44,0x55,
 891                 0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,
 892                 0xEE,0xFF,0xFF,0xEE,0xDD,0xCC,0xBB,0xAA,
 893                 0x99,0x88,0x77,0x66,0x55,0x44,0x33,0x22,
 894                 0x11,0x00,0x01,0x23,0x45,0x67,0x89,0xAB,
 895                 0xCD,0xEF,0xFE,0xDC,0xBA,0x98,0x76,0x54,
 896                 0x32,0x10,0x00,0x9A,0x00,0x98,0x00,0x00,
 897                 0x1E,0x00,0x00,0x94,0x00,0x00,0x00,0x00,
 898                 0x04,0x00,0x00,0x8C,0x00,0x00,0x00,0x40,
 899                 0x02,0x00,0x00,0x40,0xBA,0xE8,0x23,0x3C,
 900                 0x75,0xF3,0x91,0x61,0xD6,0x73,0x39,0xCF,
 901                 0x7B,0x6D,0x8E,0x61,0x97,0x63,0x9E,0xD9,
 902                 0x60,0x55,0xD6,0xC7,0xEF,0xF8,0x1E,0x63,
 903                 0x95,0x17,0xCC,0x28,0x45,0x60,0x11,0xC5,
 904                 0xC4,0x4E,0x66,0xC6,0xE6,0xC3,0xDE,0x8A,
 905                 0x19,0x30,0xCF,0x0E,0xD7,0xAA,0xDB,0x01,
 906                 0xD8,0x00,0xBB,0x8F,0x39,0x9F,0x64,0x28,
 907                 0xF5,0x7A,0x77,0x49,0xCC,0x6B,0xA3,0x91,
 908                 0x97,0x70,0xE7,0x60,0x1E,0x39,0xE1,0xE5,
 909                 0x33,0xE1,0x15,0x63,0x69,0x08,0x80,0x4C,
 910                 0x67,0xC4,0x41,0x8F,0x48,0xDF,0x26,0x98,
 911                 0xF1,0xD5,0x8D,0x88,0xD9,0x6A,0xA4,0x96,
 912                 0xC5,0x84,0xD9,0x30,0x49,0x67,0x7D,0x19,
 913                 0xB1,0xB3,0x45,0x4D,0xB2,0x53,0x9A,0x47,
 914                 0x3C,0x7C,0x55,0xBF,0xCC,0x85,0x00,0x36,
 915                 0xF1,0x3D,0x93,0x53
 916         };
 917         unsigned long long psmid;
 918         struct CPRBX *cprbx;
 919         char *reply;
 920         int rc, i;
 921
 922         reply = (void *) get_zeroed_page(GFP_KERNEL);
 923         if (!reply)
 924                 return -ENOMEM;
 925
 926         rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, msg, sizeof(msg));
 927         if (rc)
 928                 goto out_free;
 929
 930         /* Wait for the test message to complete. */
 931         for (i = 0; i < 6; i++) {
 932                 mdelay(300);
 933                 rc = ap_recv(ap_dev->qid, &psmid, reply, 4096);
 934                 if (rc == 0 && psmid == 0x0102030405060708ULL)
 935                         break;
 936         }
 937
 938         if (i >= 6) {
 939                 /* Got no answer. */
 940                 rc = -ENODEV;
 941                 goto out_free;
 942         }
 943
 944         cprbx = (struct CPRBX *) (reply + 48);
 945         if (cprbx->ccp_rtcode == 8 && cprbx->ccp_rscode == 33)
 946                 rc = ZCRYPT_PCIXCC_MCL2;
 947         else
 948                 rc = ZCRYPT_PCIXCC_MCL3;
 949 out_free:
 950         free_page((unsigned long) reply);
 951         return rc;
 952 }
 953
 954 /**
 955  * Large random number detection function. Its sends a message to a pcixcc
 956  * card to find out if large random numbers are supported.
 957  * @ap_dev: pointer to the AP device.
 958  *
 959  * Returns 1 if large random numbers are supported, 0 if not and < 0 on error.
 960  */
 961 static int zcrypt_pcixcc_rng_supported(struct ap_device *ap_dev)
 962 {
 963         struct ap_message ap_msg;
 964         unsigned long long psmid;
 965         struct {
 966                 struct type86_hdr hdr;
 967                 struct type86_fmt2_ext fmt2;
 968                 struct CPRBX cprbx;
 969         } __attribute__((packed)) *reply;
 970         int rc, i;
 971
 972         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
 973         if (!ap_msg.message)
 974                 return -ENOMEM;
 975
 976         rng_type6CPRB_msgX(ap_dev, &ap_msg, 4);
 977         rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, ap_msg.message,
 978                      ap_msg.length);
 979         if (rc)
 980                 goto out_free;
 981
 982         /* Wait for the test message to complete. */
 983         for (i = 0; i < 2 * HZ; i++) {
 984                 msleep(1000 / HZ);
 985                 rc = ap_recv(ap_dev->qid, &psmid, ap_msg.message, 4096);
 986                 if (rc == 0 && psmid == 0x0102030405060708ULL)
 987                         break;
 988         }
 989
 990         if (i >= 2 * HZ) {
 991                 /* Got no answer. */
 992                 rc = -ENODEV;
 993                 goto out_free;
 994         }
 995
 996         reply = ap_msg.message;
 997         if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0)
 998                 rc = 1;
 999         else
1000                 rc = 0;
1001 out_free:
1002         free_page((unsigned long) ap_msg.message);
1003         return rc;
1004 }
1005
1006 /**
1007  * Probe function for PCIXCC/CEX2C cards. It always accepts the AP device
1008  * since the bus_match already checked the hardware type. The PCIXCC
1009  * cards come in two flavours: micro code level 2 and micro code level 3.
1010  * This is checked by sending a test message to the device.
1011  * @ap_dev: pointer to the AP device.
1012  */
1013 static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
1014 {
1015         struct zcrypt_device *zdev;
1016         int rc;
1017
1018         zdev = zcrypt_device_alloc(PCIXCC_MAX_RESPONSE_SIZE);
1019         if (!zdev)
1020                 return -ENOMEM;
1021         zdev->ap_dev = ap_dev;
1022         zdev->online = 1;
1023         if (ap_dev->device_type == AP_DEVICE_TYPE_PCIXCC) {
1024                 rc = zcrypt_pcixcc_mcl(ap_dev);
1025                 if (rc < 0) {
1026                         zcrypt_device_free(zdev);
1027                         return rc;
1028                 }
1029                 zdev->user_space_type = rc;
1030                 if (rc == ZCRYPT_PCIXCC_MCL2) {
1031                         zdev->type_string = "PCIXCC_MCL2";
1032                         zdev->speed_rating = PCIXCC_MCL2_SPEED_RATING;
1033                         zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
1034                         zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
1035                 } else {
1036                         zdev->type_string = "PCIXCC_MCL3";
1037                         zdev->speed_rating = PCIXCC_MCL3_SPEED_RATING;
1038                         zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
1039                         zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
1040                 }
1041         } else {
1042                 zdev->user_space_type = ZCRYPT_CEX2C;
1043                 zdev->type_string = "CEX2C";
1044                 zdev->speed_rating = CEX2C_SPEED_RATING;
1045                 zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
1046                 zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
1047         }
1048         rc = zcrypt_pcixcc_rng_supported(ap_dev);
1049         if (rc < 0) {
1050                 zcrypt_device_free(zdev);
1051                 return rc;
1052         }
1053         if (rc)
1054                 zdev->ops = &zcrypt_pcixcc_with_rng_ops;
1055         else
1056                 zdev->ops = &zcrypt_pcixcc_ops;
1057         ap_dev->reply = &zdev->reply;
1058         ap_dev->private = zdev;
1059         rc = zcrypt_device_register(zdev);
1060         if (rc)
1061                 goto out_free;
1062         return 0;
1063
1064  out_free:
1065         ap_dev->private = NULL;
1066         zcrypt_device_free(zdev);
1067         return rc;
1068 }
1069
1070 /**
1071  * This is called to remove the extended PCIXCC/CEX2C driver information
1072  * if an AP device is removed.
1073  */
1074 static void zcrypt_pcixcc_remove(struct ap_device *ap_dev)
1075 {
1076         struct zcrypt_device *zdev = ap_dev->private;
1077
1078         zcrypt_device_unregister(zdev);
1079 }
1080
1081 int __init zcrypt_pcixcc_init(void)
1082 {
1083         return ap_driver_register(&zcrypt_pcixcc_driver, THIS_MODULE, "pcixcc");
1084 }
1085
1086 void zcrypt_pcixcc_exit(void)
1087 {
1088         ap_driver_unregister(&zcrypt_pcixcc_driver);
1089 }
1090
1091 #ifndef CONFIG_ZCRYPT_MONOLITHIC
1092 module_init(zcrypt_pcixcc_init);
1093 module_exit(zcrypt_pcixcc_exit);
1094 #endif