git.oblomov.eu Git - linux-2.6/blob - 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         { /* end of list */ },
  76 };
  77
  78 #ifndef CONFIG_ZCRYPT_MONOLITHIC
  79 MODULE_DEVICE_TABLE(ap, zcrypt_pcixcc_ids);
  80 MODULE_AUTHOR("IBM Corporation");
  81 MODULE_DESCRIPTION("PCIXCC Cryptographic Coprocessor device driver, "
  82                    "Copyright 2001, 2006 IBM Corporation");
  83 MODULE_LICENSE("GPL");
  84 #endif
  85
  86 static int zcrypt_pcixcc_probe(struct ap_device *ap_dev);
  87 static void zcrypt_pcixcc_remove(struct ap_device *ap_dev);
  88 static void zcrypt_pcixcc_receive(struct ap_device *, struct ap_message *,
  89                                  struct ap_message *);
  90
  91 static struct ap_driver zcrypt_pcixcc_driver = {
  92         .probe = zcrypt_pcixcc_probe,
  93         .remove = zcrypt_pcixcc_remove,
  94         .receive = zcrypt_pcixcc_receive,
  95         .ids = zcrypt_pcixcc_ids,
  96 };
  97
  98 /**
  99  * The following is used to initialize the CPRBX passed to the PCIXCC/CEX2C
 100  * card in a type6 message. The 3 fields that must be filled in at execution
 101  * time are  req_parml, rpl_parml and usage_domain.
 102  * Everything about this interface is ascii/big-endian, since the
 103  * device does *not* have 'Intel inside'.
 104  *
 105  * The CPRBX is followed immediately by the parm block.
 106  * The parm block contains:
 107  * - function code ('PD' 0x5044 or 'PK' 0x504B)
 108  * - rule block (one of:)
 109  *   + 0x000A 'PKCS-1.2' (MCL2 'PD')
 110  *   + 0x000A 'ZERO-PAD' (MCL2 'PK')
 111  *   + 0x000A 'ZERO-PAD' (MCL3 'PD' or CEX2C 'PD')
 112  *   + 0x000A 'MRP     ' (MCL3 'PK' or CEX2C 'PK')
 113  * - VUD block
 114  */
 115 static struct CPRBX static_cprbx = {
 116         .cprb_len       =  0x00DC,
 117         .cprb_ver_id    =  0x02,
 118         .func_id        = {0x54,0x32},
 119 };
 120
 121 /**
 122  * Convert a ICAMEX message to a type6 MEX message.
 123  *
 124  * @zdev: crypto device pointer
 125  * @ap_msg: pointer to AP message
 126  * @mex: pointer to user input data
 127  *
 128  * Returns 0 on success or -EFAULT.
 129  */
 130 static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_device *zdev,
 131                                        struct ap_message *ap_msg,
 132                                        struct ica_rsa_modexpo *mex)
 133 {
 134         static struct type6_hdr static_type6_hdrX = {
 135                 .type           =  0x06,
 136                 .offset1        =  0x00000058,
 137                 .agent_id       = {'C','A',},
 138                 .function_code  = {'P','K'},
 139         };
 140         static struct function_and_rules_block static_pke_fnr = {
 141                 .function_code  = {'P','K'},
 142                 .ulen           = 10,
 143                 .only_rule      = {'M','R','P',' ',' ',' ',' ',' '}
 144         };
 145         static struct function_and_rules_block static_pke_fnr_MCL2 = {
 146                 .function_code  = {'P','K'},
 147                 .ulen           = 10,
 148                 .only_rule      = {'Z','E','R','O','-','P','A','D'}
 149         };
 150         struct {
 151                 struct type6_hdr hdr;
 152                 struct CPRBX cprbx;
 153                 struct function_and_rules_block fr;
 154                 unsigned short length;
 155                 char text[0];
 156         } __attribute__((packed)) *msg = ap_msg->message;
 157         int size;
 158
 159         /* VUD.ciphertext */
 160         msg->length = mex->inputdatalength + 2;
 161         if (copy_from_user(msg->text, mex->inputdata, mex->inputdatalength))
 162                 return -EFAULT;
 163
 164         /* Set up key which is located after the variable length text. */
 165         size = zcrypt_type6_mex_key_en(mex, msg->text+mex->inputdatalength, 1);
 166         if (size < 0)
 167                 return size;
 168         size += sizeof(*msg) + mex->inputdatalength;
 169
 170         /* message header, cprbx and f&r */
 171         msg->hdr = static_type6_hdrX;
 172         msg->hdr.ToCardLen1 = size - sizeof(msg->hdr);
 173         msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);
 174
 175         msg->cprbx = static_cprbx;
 176         msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
 177         msg->cprbx.rpl_msgbl = msg->hdr.FromCardLen1;
 178
 179         msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
 180                 static_pke_fnr_MCL2 : static_pke_fnr;
 181
 182         msg->cprbx.req_parml = size - sizeof(msg->hdr) - sizeof(msg->cprbx);
 183
 184         ap_msg->length = size;
 185         return 0;
 186 }
 187
 188 /**
 189  * Convert a ICACRT message to a type6 CRT message.
 190  *
 191  * @zdev: crypto device pointer
 192  * @ap_msg: pointer to AP message
 193  * @crt: pointer to user input data
 194  *
 195  * Returns 0 on success or -EFAULT.
 196  */
 197 static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_device *zdev,
 198                                        struct ap_message *ap_msg,
 199                                        struct ica_rsa_modexpo_crt *crt)
 200 {
 201         static struct type6_hdr static_type6_hdrX = {
 202                 .type           =  0x06,
 203                 .offset1        =  0x00000058,
 204                 .agent_id       = {'C','A',},
 205                 .function_code  = {'P','D'},
 206         };
 207         static struct function_and_rules_block static_pkd_fnr = {
 208                 .function_code  = {'P','D'},
 209                 .ulen           = 10,
 210                 .only_rule      = {'Z','E','R','O','-','P','A','D'}
 211         };
 212
 213         static struct function_and_rules_block static_pkd_fnr_MCL2 = {
 214                 .function_code  = {'P','D'},
 215                 .ulen           = 10,
 216                 .only_rule      = {'P','K','C','S','-','1','.','2'}
 217         };
 218         struct {
 219                 struct type6_hdr hdr;
 220                 struct CPRBX cprbx;
 221                 struct function_and_rules_block fr;
 222                 unsigned short length;
 223                 char text[0];
 224         } __attribute__((packed)) *msg = ap_msg->message;
 225         int size;
 226
 227         /* VUD.ciphertext */
 228         msg->length = crt->inputdatalength + 2;
 229         if (copy_from_user(msg->text, crt->inputdata, crt->inputdatalength))
 230                 return -EFAULT;
 231
 232         /* Set up key which is located after the variable length text. */
 233         size = zcrypt_type6_crt_key(crt, msg->text + crt->inputdatalength, 1);
 234         if (size < 0)
 235                 return size;
 236         size += sizeof(*msg) + crt->inputdatalength;    /* total size of msg */
 237
 238         /* message header, cprbx and f&r */
 239         msg->hdr = static_type6_hdrX;
 240         msg->hdr.ToCardLen1 = size -  sizeof(msg->hdr);
 241         msg->hdr.FromCardLen1 = PCIXCC_MAX_ICA_RESPONSE_SIZE - sizeof(msg->hdr);
 242
 243         msg->cprbx = static_cprbx;
 244         msg->cprbx.domain = AP_QID_QUEUE(zdev->ap_dev->qid);
 245         msg->cprbx.req_parml = msg->cprbx.rpl_msgbl =
 246                 size - sizeof(msg->hdr) - sizeof(msg->cprbx);
 247
 248         msg->fr = (zdev->user_space_type == ZCRYPT_PCIXCC_MCL2) ?
 249                 static_pkd_fnr_MCL2 : static_pkd_fnr;
 250
 251         ap_msg->length = size;
 252         return 0;
 253 }
 254
 255 /**
 256  * Convert a XCRB message to a type6 CPRB message.
 257  *
 258  * @zdev: crypto device pointer
 259  * @ap_msg: pointer to AP message
 260  * @xcRB: pointer to user input data
 261  *
 262  * Returns 0 on success or -EFAULT.
 263  */
 264 struct type86_fmt2_msg {
 265         struct type86_hdr hdr;
 266         struct type86_fmt2_ext fmt2;
 267 } __attribute__((packed));
 268
 269 static int XCRB_msg_to_type6CPRB_msgX(struct zcrypt_device *zdev,
 270                                        struct ap_message *ap_msg,
 271                                        struct ica_xcRB *xcRB)
 272 {
 273         static struct type6_hdr static_type6_hdrX = {
 274                 .type           =  0x06,
 275                 .offset1        =  0x00000058,
 276         };
 277         struct {
 278                 struct type6_hdr hdr;
 279                 struct ica_CPRBX cprbx;
 280         } __attribute__((packed)) *msg = ap_msg->message;
 281
 282         int rcblen = CEIL4(xcRB->request_control_blk_length);
 283         int replylen;
 284         char *req_data = ap_msg->message + sizeof(struct type6_hdr) + rcblen;
 285         char *function_code;
 286
 287         /* length checks */
 288         ap_msg->length = sizeof(struct type6_hdr) +
 289                 CEIL4(xcRB->request_control_blk_length) +
 290                 xcRB->request_data_length;
 291         if (ap_msg->length > PCIXCC_MAX_XCRB_MESSAGE_SIZE) {
 292                 PRINTK("Combined message is too large (%ld/%d/%d).\n",
 293                     sizeof(struct type6_hdr),
 294                     xcRB->request_control_blk_length,
 295                     xcRB->request_data_length);
 296                 return -EFAULT;
 297         }
 298         if (CEIL4(xcRB->reply_control_blk_length) >
 299             PCIXCC_MAX_XCRB_REPLY_SIZE) {
 300                 PDEBUG("Reply CPRB length is too large (%d).\n",
 301                     xcRB->request_control_blk_length);
 302                 return -EFAULT;
 303         }
 304         if (CEIL4(xcRB->reply_data_length) > PCIXCC_MAX_XCRB_DATA_SIZE) {
 305                 PDEBUG("Reply data block length is too large (%d).\n",
 306                     xcRB->reply_data_length);
 307                 return -EFAULT;
 308         }
 309         replylen = CEIL4(xcRB->reply_control_blk_length) +
 310                 CEIL4(xcRB->reply_data_length) +
 311                 sizeof(struct type86_fmt2_msg);
 312         if (replylen > PCIXCC_MAX_XCRB_RESPONSE_SIZE) {
 313                 PDEBUG("Reply CPRB + data block > PCIXCC_MAX_XCRB_RESPONSE_SIZE"
 314                        " (%d/%d/%d).\n",
 315                        sizeof(struct type86_fmt2_msg),
 316                        xcRB->reply_control_blk_length,
 317                        xcRB->reply_data_length);
 318                 xcRB->reply_control_blk_length = PCIXCC_MAX_XCRB_RESPONSE_SIZE -
 319                         (sizeof(struct type86_fmt2_msg) +
 320                             CEIL4(xcRB->reply_data_length));
 321                 PDEBUG("Capping Reply CPRB length at %d\n",
 322                        xcRB->reply_control_blk_length);
 323         }
 324
 325         /* prepare type6 header */
 326         msg->hdr = static_type6_hdrX;
 327         memcpy(msg->hdr.agent_id , &(xcRB->agent_ID), sizeof(xcRB->agent_ID));
 328         msg->hdr.ToCardLen1 = xcRB->request_control_blk_length;
 329         if (xcRB->request_data_length) {
 330                 msg->hdr.offset2 = msg->hdr.offset1 + rcblen;
 331                 msg->hdr.ToCardLen2 = xcRB->request_data_length;
 332         }
 333         msg->hdr.FromCardLen1 = xcRB->reply_control_blk_length;
 334         msg->hdr.FromCardLen2 = xcRB->reply_data_length;
 335
 336         /* prepare CPRB */
 337         if (copy_from_user(&(msg->cprbx), xcRB->request_control_blk_addr,
 338                     xcRB->request_control_blk_length))
 339                 return -EFAULT;
 340         if (msg->cprbx.cprb_len + sizeof(msg->hdr.function_code) >
 341             xcRB->request_control_blk_length) {
 342                 PDEBUG("cprb_len too large (%d/%d)\n", msg->cprbx.cprb_len,
 343                     xcRB->request_control_blk_length);
 344                 return -EFAULT;
 345         }
 346         function_code = ((unsigned char *)&msg->cprbx) + msg->cprbx.cprb_len;
 347         memcpy(msg->hdr.function_code, function_code, sizeof(msg->hdr.function_code));
 348
 349         /* copy data block */
 350         if (xcRB->request_data_length &&
 351             copy_from_user(req_data, xcRB->request_data_address,
 352                 xcRB->request_data_length))
 353                 return -EFAULT;
 354         return 0;
 355 }
 356
 357 /**
 358  * Copy results from a type 86 ICA reply message back to user space.
 359  *
 360  * @zdev: crypto device pointer
 361  * @reply: reply AP message.
 362  * @data: pointer to user output data
 363  * @length: size of user output data
 364  *
 365  * Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
 366  */
 367 struct type86x_reply {
 368         struct type86_hdr hdr;
 369         struct type86_fmt2_ext fmt2;
 370         struct CPRBX cprbx;
 371         unsigned char pad[4];   /* 4 byte function code/rules block ? */
 372         unsigned short length;
 373         char text[0];
 374 } __attribute__((packed));
 375
 376 static int convert_type86_ica(struct zcrypt_device *zdev,
 377                           struct ap_message *reply,
 378                           char __user *outputdata,
 379                           unsigned int outputdatalength)
 380 {
 381         static unsigned char static_pad[] = {
 382                 0x00,0x02,
 383                 0x1B,0x7B,0x5D,0xB5,0x75,0x01,0x3D,0xFD,
 384                 0x8D,0xD1,0xC7,0x03,0x2D,0x09,0x23,0x57,
 385                 0x89,0x49,0xB9,0x3F,0xBB,0x99,0x41,0x5B,
 386                 0x75,0x21,0x7B,0x9D,0x3B,0x6B,0x51,0x39,
 387                 0xBB,0x0D,0x35,0xB9,0x89,0x0F,0x93,0xA5,
 388                 0x0B,0x47,0xF1,0xD3,0xBB,0xCB,0xF1,0x9D,
 389                 0x23,0x73,0x71,0xFF,0xF3,0xF5,0x45,0xFB,
 390                 0x61,0x29,0x23,0xFD,0xF1,0x29,0x3F,0x7F,
 391                 0x17,0xB7,0x1B,0xA9,0x19,0xBD,0x57,0xA9,
 392                 0xD7,0x95,0xA3,0xCB,0xED,0x1D,0xDB,0x45,
 393                 0x7D,0x11,0xD1,0x51,0x1B,0xED,0x71,0xE9,
 394                 0xB1,0xD1,0xAB,0xAB,0x21,0x2B,0x1B,0x9F,
 395                 0x3B,0x9F,0xF7,0xF7,0xBD,0x63,0xEB,0xAD,
 396                 0xDF,0xB3,0x6F,0x5B,0xDB,0x8D,0xA9,0x5D,
 397                 0xE3,0x7D,0x77,0x49,0x47,0xF5,0xA7,0xFD,
 398                 0xAB,0x2F,0x27,0x35,0x77,0xD3,0x49,0xC9,
 399                 0x09,0xEB,0xB1,0xF9,0xBF,0x4B,0xCB,0x2B,
 400                 0xEB,0xEB,0x05,0xFF,0x7D,0xC7,0x91,0x8B,
 401                 0x09,0x83,0xB9,0xB9,0x69,0x33,0x39,0x6B,
 402                 0x79,0x75,0x19,0xBF,0xBB,0x07,0x1D,0xBD,
 403                 0x29,0xBF,0x39,0x95,0x93,0x1D,0x35,0xC7,
 404                 0xC9,0x4D,0xE5,0x97,0x0B,0x43,0x9B,0xF1,
 405                 0x16,0x93,0x03,0x1F,0xA5,0xFB,0xDB,0xF3,
 406                 0x27,0x4F,0x27,0x61,0x05,0x1F,0xB9,0x23,
 407                 0x2F,0xC3,0x81,0xA9,0x23,0x71,0x55,0x55,
 408                 0xEB,0xED,0x41,0xE5,0xF3,0x11,0xF1,0x43,
 409                 0x69,0x03,0xBD,0x0B,0x37,0x0F,0x51,0x8F,
 410                 0x0B,0xB5,0x89,0x5B,0x67,0xA9,0xD9,0x4F,
 411                 0x01,0xF9,0x21,0x77,0x37,0x73,0x79,0xC5,
 412                 0x7F,0x51,0xC1,0xCF,0x97,0xA1,0x75,0xAD,
 413                 0x35,0x9D,0xD3,0xD3,0xA7,0x9D,0x5D,0x41,
 414                 0x6F,0x65,0x1B,0xCF,0xA9,0x87,0x91,0x09
 415         };
 416         struct type86x_reply *msg = reply->message;
 417         unsigned short service_rc, service_rs;
 418         unsigned int reply_len, pad_len;
 419         char *data;
 420
 421         service_rc = msg->cprbx.ccp_rtcode;
 422         if (unlikely(service_rc != 0)) {
 423                 service_rs = msg->cprbx.ccp_rscode;
 424                 if (service_rc == 8 && service_rs == 66) {
 425                         PDEBUG("Bad block format on PCIXCC/CEX2C\n");
 426                         return -EINVAL;
 427                 }
 428                 if (service_rc == 8 && service_rs == 65) {
 429                         PDEBUG("Probably an even modulus on PCIXCC/CEX2C\n");
 430                         return -EINVAL;
 431                 }
 432                 if (service_rc == 8 && service_rs == 770) {
 433                         PDEBUG("Invalid key length on PCIXCC/CEX2C\n");
 434                         zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
 435                         return -EAGAIN;
 436                 }
 437                 if (service_rc == 8 && service_rs == 783) {
 438                         PDEBUG("Extended bitlengths not enabled on PCIXCC/CEX2C\n");
 439                         zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
 440                         return -EAGAIN;
 441                 }
 442                 PRINTK("Unknown service rc/rs (PCIXCC/CEX2C): %d/%d\n",
 443                        service_rc, service_rs);
 444                 zdev->online = 0;
 445                 return -EAGAIN; /* repeat the request on a different device. */
 446         }
 447         data = msg->text;
 448         reply_len = msg->length - 2;
 449         if (reply_len > outputdatalength)
 450                 return -EINVAL;
 451         /**
 452          * For all encipher requests, the length of the ciphertext (reply_len)
 453          * will always equal the modulus length. For MEX decipher requests
 454          * the output needs to get padded. Minimum pad size is 10.
 455          *
 456          * Currently, the cases where padding will be added is for:
 457          * - PCIXCC_MCL2 using a CRT form token (since PKD didn't support
 458          *   ZERO-PAD and CRT is only supported for PKD requests)
 459          * - PCICC, always
 460          */
 461         pad_len = outputdatalength - reply_len;
 462         if (pad_len > 0) {
 463                 if (pad_len < 10)
 464                         return -EINVAL;
 465                 /* 'restore' padding left in the PCICC/PCIXCC card. */
 466                 if (copy_to_user(outputdata, static_pad, pad_len - 1))
 467                         return -EFAULT;
 468                 if (put_user(0, outputdata + pad_len - 1))
 469                         return -EFAULT;
 470         }
 471         /* Copy the crypto response to user space. */
 472         if (copy_to_user(outputdata + pad_len, data, reply_len))
 473                 return -EFAULT;
 474         return 0;
 475 }
 476
 477 /**
 478  * Copy results from a type 86 XCRB reply message back to user space.
 479  *
 480  * @zdev: crypto device pointer
 481  * @reply: reply AP message.
 482  * @xcRB: pointer to XCRB
 483  *
 484  * Returns 0 on success or -EINVAL, -EFAULT, -EAGAIN in case of an error.
 485  */
 486 static int convert_type86_xcrb(struct zcrypt_device *zdev,
 487                                struct ap_message *reply,
 488                                struct ica_xcRB *xcRB)
 489 {
 490         struct type86_fmt2_msg *msg = reply->message;
 491         char *data = reply->message;
 492
 493         /* Copy CPRB to user */
 494         if (copy_to_user(xcRB->reply_control_blk_addr,
 495                 data + msg->fmt2.offset1, msg->fmt2.count1))
 496                 return -EFAULT;
 497         xcRB->reply_control_blk_length = msg->fmt2.count1;
 498
 499         /* Copy data buffer to user */
 500         if (msg->fmt2.count2)
 501                 if (copy_to_user(xcRB->reply_data_addr,
 502                         data + msg->fmt2.offset2, msg->fmt2.count2))
 503                         return -EFAULT;
 504         xcRB->reply_data_length = msg->fmt2.count2;
 505         return 0;
 506 }
 507
 508 static int convert_response_ica(struct zcrypt_device *zdev,
 509                             struct ap_message *reply,
 510                             char __user *outputdata,
 511                             unsigned int outputdatalength)
 512 {
 513         struct type86x_reply *msg = reply->message;
 514
 515         /* Response type byte is the second byte in the response. */
 516         switch (((unsigned char *) reply->message)[1]) {
 517         case TYPE82_RSP_CODE:
 518         case TYPE88_RSP_CODE:
 519                 return convert_error(zdev, reply);
 520         case TYPE86_RSP_CODE:
 521                 if (msg->hdr.reply_code)
 522                         return convert_error(zdev, reply);
 523                 if (msg->cprbx.cprb_ver_id == 0x02)
 524                         return convert_type86_ica(zdev, reply,
 525                                                   outputdata, outputdatalength);
 526                 /* no break, incorrect cprb version is an unknown response */
 527         default: /* Unknown response type, this should NEVER EVER happen */
 528                 PRINTK("Unrecognized Message Header: %08x%08x\n",
 529                        *(unsigned int *) reply->message,
 530                        *(unsigned int *) (reply->message+4));
 531                 zdev->online = 0;
 532                 return -EAGAIN; /* repeat the request on a different device. */
 533         }
 534 }
 535
 536 static int convert_response_xcrb(struct zcrypt_device *zdev,
 537                             struct ap_message *reply,
 538                             struct ica_xcRB *xcRB)
 539 {
 540         struct type86x_reply *msg = reply->message;
 541
 542         /* Response type byte is the second byte in the response. */
 543         switch (((unsigned char *) reply->message)[1]) {
 544         case TYPE82_RSP_CODE:
 545         case TYPE88_RSP_CODE:
 546                 xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
 547                 return convert_error(zdev, reply);
 548         case TYPE86_RSP_CODE:
 549                 if (msg->hdr.reply_code) {
 550                         memcpy(&(xcRB->status), msg->fmt2.apfs, sizeof(u32));
 551                         return convert_error(zdev, reply);
 552                 }
 553                 if (msg->cprbx.cprb_ver_id == 0x02)
 554                         return convert_type86_xcrb(zdev, reply, xcRB);
 555                 /* no break, incorrect cprb version is an unknown response */
 556         default: /* Unknown response type, this should NEVER EVER happen */
 557                 PRINTK("Unrecognized Message Header: %08x%08x\n",
 558                        *(unsigned int *) reply->message,
 559                        *(unsigned int *) (reply->message+4));
 560                 xcRB->status = 0x0008044DL; /* HDD_InvalidParm */
 561                 zdev->online = 0;
 562                 return -EAGAIN; /* repeat the request on a different device. */
 563         }
 564 }
 565
 566 /**
 567  * This function is called from the AP bus code after a crypto request
 568  * "msg" has finished with the reply message "reply".
 569  * It is called from tasklet context.
 570  * @ap_dev: pointer to the AP device
 571  * @msg: pointer to the AP message
 572  * @reply: pointer to the AP reply message
 573  */
 574 static void zcrypt_pcixcc_receive(struct ap_device *ap_dev,
 575                                   struct ap_message *msg,
 576                                   struct ap_message *reply)
 577 {
 578         static struct error_hdr error_reply = {
 579                 .type = TYPE82_RSP_CODE,
 580                 .reply_code = REP82_ERROR_MACHINE_FAILURE,
 581         };
 582         struct response_type *resp_type =
 583                 (struct response_type *) msg->private;
 584         struct type86x_reply *t86r = reply->message;
 585         int length;
 586
 587         /* Copy the reply message to the request message buffer. */
 588         if (IS_ERR(reply))
 589                 memcpy(msg->message, &error_reply, sizeof(error_reply));
 590         else if (t86r->hdr.type == TYPE86_RSP_CODE &&
 591                  t86r->cprbx.cprb_ver_id == 0x02) {
 592                 switch (resp_type->type) {
 593                 case PCIXCC_RESPONSE_TYPE_ICA:
 594                         length = sizeof(struct type86x_reply)
 595                                 + t86r->length - 2;
 596                         length = min(PCIXCC_MAX_ICA_RESPONSE_SIZE, length);
 597                         memcpy(msg->message, reply->message, length);
 598                         break;
 599                 case PCIXCC_RESPONSE_TYPE_XCRB:
 600                         length = t86r->fmt2.offset2 + t86r->fmt2.count2;
 601                         length = min(PCIXCC_MAX_XCRB_RESPONSE_SIZE, length);
 602                         memcpy(msg->message, reply->message, length);
 603                         break;
 604                 default:
 605                         PRINTK("Invalid internal response type: %i\n",
 606                             resp_type->type);
 607                         memcpy(msg->message, &error_reply,
 608                             sizeof error_reply);
 609                 }
 610         } else
 611                 memcpy(msg->message, reply->message, sizeof error_reply);
 612         complete(&(resp_type->work));
 613 }
 614
 615 static atomic_t zcrypt_step = ATOMIC_INIT(0);
 616
 617 /**
 618  * The request distributor calls this function if it picked the PCIXCC/CEX2C
 619  * device to handle a modexpo request.
 620  * @zdev: pointer to zcrypt_device structure that identifies the
 621  *        PCIXCC/CEX2C device to the request distributor
 622  * @mex: pointer to the modexpo request buffer
 623  */
 624 static long zcrypt_pcixcc_modexpo(struct zcrypt_device *zdev,
 625                                   struct ica_rsa_modexpo *mex)
 626 {
 627         struct ap_message ap_msg;
 628         struct response_type resp_type = {
 629                 .type = PCIXCC_RESPONSE_TYPE_ICA,
 630         };
 631         int rc;
 632
 633         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
 634         if (!ap_msg.message)
 635                 return -ENOMEM;
 636         ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
 637                                 atomic_inc_return(&zcrypt_step);
 638         ap_msg.private = &resp_type;
 639         rc = ICAMEX_msg_to_type6MEX_msgX(zdev, &ap_msg, mex);
 640         if (rc)
 641                 goto out_free;
 642         init_completion(&resp_type.work);
 643         ap_queue_message(zdev->ap_dev, &ap_msg);
 644         rc = wait_for_completion_interruptible_timeout(
 645                                 &resp_type.work, PCIXCC_CLEANUP_TIME);
 646         if (rc > 0)
 647                 rc = convert_response_ica(zdev, &ap_msg, mex->outputdata,
 648                                           mex->outputdatalength);
 649         else {
 650                 /* Signal pending or message timed out. */
 651                 ap_cancel_message(zdev->ap_dev, &ap_msg);
 652                 if (rc == 0)
 653                         /* Message timed out. */
 654                         rc = -ETIME;
 655         }
 656 out_free:
 657         free_page((unsigned long) ap_msg.message);
 658         return rc;
 659 }
 660
 661 /**
 662  * The request distributor calls this function if it picked the PCIXCC/CEX2C
 663  * device to handle a modexpo_crt request.
 664  * @zdev: pointer to zcrypt_device structure that identifies the
 665  *        PCIXCC/CEX2C device to the request distributor
 666  * @crt: pointer to the modexpoc_crt request buffer
 667  */
 668 static long zcrypt_pcixcc_modexpo_crt(struct zcrypt_device *zdev,
 669                                       struct ica_rsa_modexpo_crt *crt)
 670 {
 671         struct ap_message ap_msg;
 672         struct response_type resp_type = {
 673                 .type = PCIXCC_RESPONSE_TYPE_ICA,
 674         };
 675         int rc;
 676
 677         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
 678         if (!ap_msg.message)
 679                 return -ENOMEM;
 680         ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
 681                                 atomic_inc_return(&zcrypt_step);
 682         ap_msg.private = &resp_type;
 683         rc = ICACRT_msg_to_type6CRT_msgX(zdev, &ap_msg, crt);
 684         if (rc)
 685                 goto out_free;
 686         init_completion(&resp_type.work);
 687         ap_queue_message(zdev->ap_dev, &ap_msg);
 688         rc = wait_for_completion_interruptible_timeout(
 689                                 &resp_type.work, PCIXCC_CLEANUP_TIME);
 690         if (rc > 0)
 691                 rc = convert_response_ica(zdev, &ap_msg, crt->outputdata,
 692                                           crt->outputdatalength);
 693         else {
 694                 /* Signal pending or message timed out. */
 695                 ap_cancel_message(zdev->ap_dev, &ap_msg);
 696                 if (rc == 0)
 697                         /* Message timed out. */
 698                         rc = -ETIME;
 699         }
 700 out_free:
 701         free_page((unsigned long) ap_msg.message);
 702         return rc;
 703 }
 704
 705 /**
 706  * The request distributor calls this function if it picked the PCIXCC/CEX2C
 707  * device to handle a send_cprb request.
 708  * @zdev: pointer to zcrypt_device structure that identifies the
 709  *        PCIXCC/CEX2C device to the request distributor
 710  * @xcRB: pointer to the send_cprb request buffer
 711  */
 712 static long zcrypt_pcixcc_send_cprb(struct zcrypt_device *zdev,
 713                                     struct ica_xcRB *xcRB)
 714 {
 715         struct ap_message ap_msg;
 716         struct response_type resp_type = {
 717                 .type = PCIXCC_RESPONSE_TYPE_XCRB,
 718         };
 719         int rc;
 720
 721         ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
 722         if (!ap_msg.message)
 723                 return -ENOMEM;
 724         ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
 725                                 atomic_inc_return(&zcrypt_step);
 726         ap_msg.private = &resp_type;
 727         rc = XCRB_msg_to_type6CPRB_msgX(zdev, &ap_msg, xcRB);
 728         if (rc)
 729                 goto out_free;
 730         init_completion(&resp_type.work);
 731         ap_queue_message(zdev->ap_dev, &ap_msg);
 732         rc = wait_for_completion_interruptible_timeout(
 733                                 &resp_type.work, PCIXCC_CLEANUP_TIME);
 734         if (rc > 0)
 735                 rc = convert_response_xcrb(zdev, &ap_msg, xcRB);
 736         else {
 737                 /* Signal pending or message timed out. */
 738                 ap_cancel_message(zdev->ap_dev, &ap_msg);
 739                 if (rc == 0)
 740                         /* Message timed out. */
 741                         rc = -ETIME;
 742         }
 743 out_free:
 744         memset(ap_msg.message, 0x0, ap_msg.length);
 745         kfree(ap_msg.message);
 746         return rc;
 747 }
 748
 749 /**
 750  * The crypto operations for a PCIXCC/CEX2C card.
 751  */
 752 static struct zcrypt_ops zcrypt_pcixcc_ops = {
 753         .rsa_modexpo = zcrypt_pcixcc_modexpo,
 754         .rsa_modexpo_crt = zcrypt_pcixcc_modexpo_crt,
 755         .send_cprb = zcrypt_pcixcc_send_cprb,
 756 };
 757
 758 /**
 759  * Micro-code detection function. Its sends a message to a pcixcc card
 760  * to find out the microcode level.
 761  * @ap_dev: pointer to the AP device.
 762  */
 763 static int zcrypt_pcixcc_mcl(struct ap_device *ap_dev)
 764 {
 765         static unsigned char msg[] = {
 766                 0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,
 767                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 768                 0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x00,
 769                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 770                 0x43,0x41,0x00,0x00,0x00,0x00,0x00,0x00,
 771                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 772                 0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x00,
 773                 0x00,0x00,0x01,0xC4,0x00,0x00,0x00,0x00,
 774                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 775                 0x00,0x00,0x07,0x24,0x00,0x00,0x00,0x00,
 776                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 777                 0x00,0xDC,0x02,0x00,0x00,0x00,0x54,0x32,
 778                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE8,
 779                 0x00,0x00,0x00,0x00,0x00,0x00,0x07,0x24,
 780                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 781                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 782                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 783                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 784                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 785                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 786                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 787                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 788                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 789                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 790                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 791                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 792                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 793                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 794                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 795                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 796                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 797                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 798                 0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,
 799                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 800                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 801                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 802                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 803                 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 804                 0x00,0x00,0x00,0x00,0x50,0x4B,0x00,0x0A,
 805                 0x4D,0x52,0x50,0x20,0x20,0x20,0x20,0x20,
 806                 0x00,0x42,0x00,0x01,0x02,0x03,0x04,0x05,
 807                 0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,
 808                 0x0E,0x0F,0x00,0x11,0x22,0x33,0x44,0x55,
 809                 0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,
 810                 0xEE,0xFF,0xFF,0xEE,0xDD,0xCC,0xBB,0xAA,
 811                 0x99,0x88,0x77,0x66,0x55,0x44,0x33,0x22,
 812                 0x11,0x00,0x01,0x23,0x45,0x67,0x89,0xAB,
 813                 0xCD,0xEF,0xFE,0xDC,0xBA,0x98,0x76,0x54,
 814                 0x32,0x10,0x00,0x9A,0x00,0x98,0x00,0x00,
 815                 0x1E,0x00,0x00,0x94,0x00,0x00,0x00,0x00,
 816                 0x04,0x00,0x00,0x8C,0x00,0x00,0x00,0x40,
 817                 0x02,0x00,0x00,0x40,0xBA,0xE8,0x23,0x3C,
 818                 0x75,0xF3,0x91,0x61,0xD6,0x73,0x39,0xCF,
 819                 0x7B,0x6D,0x8E,0x61,0x97,0x63,0x9E,0xD9,
 820                 0x60,0x55,0xD6,0xC7,0xEF,0xF8,0x1E,0x63,
 821                 0x95,0x17,0xCC,0x28,0x45,0x60,0x11,0xC5,
 822                 0xC4,0x4E,0x66,0xC6,0xE6,0xC3,0xDE,0x8A,
 823                 0x19,0x30,0xCF,0x0E,0xD7,0xAA,0xDB,0x01,
 824                 0xD8,0x00,0xBB,0x8F,0x39,0x9F,0x64,0x28,
 825                 0xF5,0x7A,0x77,0x49,0xCC,0x6B,0xA3,0x91,
 826                 0x97,0x70,0xE7,0x60,0x1E,0x39,0xE1,0xE5,
 827                 0x33,0xE1,0x15,0x63,0x69,0x08,0x80,0x4C,
 828                 0x67,0xC4,0x41,0x8F,0x48,0xDF,0x26,0x98,
 829                 0xF1,0xD5,0x8D,0x88,0xD9,0x6A,0xA4,0x96,
 830                 0xC5,0x84,0xD9,0x30,0x49,0x67,0x7D,0x19,
 831                 0xB1,0xB3,0x45,0x4D,0xB2,0x53,0x9A,0x47,
 832                 0x3C,0x7C,0x55,0xBF,0xCC,0x85,0x00,0x36,
 833                 0xF1,0x3D,0x93,0x53
 834         };
 835         unsigned long long psmid;
 836         struct CPRBX *cprbx;
 837         char *reply;
 838         int rc, i;
 839
 840         reply = (void *) get_zeroed_page(GFP_KERNEL);
 841         if (!reply)
 842                 return -ENOMEM;
 843
 844         rc = ap_send(ap_dev->qid, 0x0102030405060708ULL, msg, sizeof(msg));
 845         if (rc)
 846                 goto out_free;
 847
 848         /* Wait for the test message to complete. */
 849         for (i = 0; i < 6; i++) {
 850                 mdelay(300);
 851                 rc = ap_recv(ap_dev->qid, &psmid, reply, 4096);
 852                 if (rc == 0 && psmid == 0x0102030405060708ULL)
 853                         break;
 854         }
 855
 856         if (i >= 6) {
 857                 /* Got no answer. */
 858                 rc = -ENODEV;
 859                 goto out_free;
 860         }
 861
 862         cprbx = (struct CPRBX *) (reply + 48);
 863         if (cprbx->ccp_rtcode == 8 && cprbx->ccp_rscode == 33)
 864                 rc = ZCRYPT_PCIXCC_MCL2;
 865         else
 866                 rc = ZCRYPT_PCIXCC_MCL3;
 867 out_free:
 868         free_page((unsigned long) reply);
 869         return rc;
 870 }
 871
 872 /**
 873  * Probe function for PCIXCC/CEX2C cards. It always accepts the AP device
 874  * since the bus_match already checked the hardware type. The PCIXCC
 875  * cards come in two flavours: micro code level 2 and micro code level 3.
 876  * This is checked by sending a test message to the device.
 877  * @ap_dev: pointer to the AP device.
 878  */
 879 static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
 880 {
 881         struct zcrypt_device *zdev;
 882         int rc;
 883
 884         zdev = zcrypt_device_alloc(PCIXCC_MAX_RESPONSE_SIZE);
 885         if (!zdev)
 886                 return -ENOMEM;
 887         zdev->ap_dev = ap_dev;
 888         zdev->ops = &zcrypt_pcixcc_ops;
 889         zdev->online = 1;
 890         if (ap_dev->device_type == AP_DEVICE_TYPE_PCIXCC) {
 891                 rc = zcrypt_pcixcc_mcl(ap_dev);
 892                 if (rc < 0) {
 893                         zcrypt_device_free(zdev);
 894                         return rc;
 895                 }
 896                 zdev->user_space_type = rc;
 897                 if (rc == ZCRYPT_PCIXCC_MCL2) {
 898                         zdev->type_string = "PCIXCC_MCL2";
 899                         zdev->speed_rating = PCIXCC_MCL2_SPEED_RATING;
 900                         zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE_OLD;
 901                         zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
 902                 } else {
 903                         zdev->type_string = "PCIXCC_MCL3";
 904                         zdev->speed_rating = PCIXCC_MCL3_SPEED_RATING;
 905                         zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
 906                         zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
 907                 }
 908         } else {
 909                 zdev->user_space_type = ZCRYPT_CEX2C;
 910                 zdev->type_string = "CEX2C";
 911                 zdev->speed_rating = CEX2C_SPEED_RATING;
 912                 zdev->min_mod_size = PCIXCC_MIN_MOD_SIZE;
 913                 zdev->max_mod_size = PCIXCC_MAX_MOD_SIZE;
 914         }
 915         ap_dev->reply = &zdev->reply;
 916         ap_dev->private = zdev;
 917         rc = zcrypt_device_register(zdev);
 918         if (rc)
 919                 goto out_free;
 920         return 0;
 921
 922  out_free:
 923         ap_dev->private = NULL;
 924         zcrypt_device_free(zdev);
 925         return rc;
 926 }
 927
 928 /**
 929  * This is called to remove the extended PCIXCC/CEX2C driver information
 930  * if an AP device is removed.
 931  */
 932 static void zcrypt_pcixcc_remove(struct ap_device *ap_dev)
 933 {
 934         struct zcrypt_device *zdev = ap_dev->private;
 935
 936         zcrypt_device_unregister(zdev);
 937 }
 938
 939 int __init zcrypt_pcixcc_init(void)
 940 {
 941         return ap_driver_register(&zcrypt_pcixcc_driver, THIS_MODULE, "pcixcc");
 942 }
 943
 944 void zcrypt_pcixcc_exit(void)
 945 {
 946         ap_driver_unregister(&zcrypt_pcixcc_driver);
 947 }
 948
 949 #ifndef CONFIG_ZCRYPT_MONOLITHIC
 950 module_init(zcrypt_pcixcc_init);
 951 module_exit(zcrypt_pcixcc_exit);
 952 #endif