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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright IBM Corp. 2001, 2018 * Author(s): Robert Burroughs * Eric Rossman (edrossma@us.ibm.com) * * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> * Ralph Wuerthner <rwuerthn@de.ibm.com> * MSGTYPE restruct: Holger Dengler <hd@linux.vnet.ibm.com> */ #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/atomic.h> #include <linux/uaccess.h> #include <linux/mod_devicetable.h> #include "ap_bus.h" #include "zcrypt_api.h" #include "zcrypt_error.h" #include "zcrypt_msgtype6.h" #include "zcrypt_cex2c.h" #include "zcrypt_cca_key.h" #include "zcrypt_ccamisc.h" #define CEX2C_MIN_MOD_SIZE 16 /* 128 bits */ #define CEX2C_MAX_MOD_SIZE 256 /* 2048 bits */ #define CEX3C_MIN_MOD_SIZE 16 /* 128 bits */ #define CEX3C_MAX_MOD_SIZE 512 /* 4096 bits */ #define CEX2C_MAX_XCRB_MESSAGE_SIZE (12*1024) #define CEX2C_CLEANUP_TIME (15*HZ) MODULE_AUTHOR("IBM Corporation"); MODULE_DESCRIPTION("CEX2C/CEX3C Cryptographic Coprocessor device driver, " \ "Copyright IBM Corp. 2001, 2018"); MODULE_LICENSE("GPL"); static struct ap_device_id zcrypt_cex2c_card_ids[] = { { .dev_type = AP_DEVICE_TYPE_CEX2C, .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, { .dev_type = AP_DEVICE_TYPE_CEX3C, .match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE }, { /* end of list */ }, }; MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_card_ids); static struct ap_device_id zcrypt_cex2c_queue_ids[] = { { .dev_type = AP_DEVICE_TYPE_CEX2C, .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, { .dev_type = AP_DEVICE_TYPE_CEX3C, .match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE }, { /* end of list */ }, }; MODULE_DEVICE_TABLE(ap, zcrypt_cex2c_queue_ids); /* * CCA card additional device attributes */ static ssize_t cca_serialnr_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cca_info ci; struct ap_card *ac = to_ap_card(dev); struct zcrypt_card *zc = ac->private; memset(&ci, 0, sizeof(ci)); if (ap_domain_index >= 0) cca_get_info(ac->id, ap_domain_index, &ci, zc->online); return scnprintf(buf, PAGE_SIZE, "%s\n", ci.serial); } static struct device_attribute dev_attr_cca_serialnr = __ATTR(serialnr, 0444, cca_serialnr_show, NULL); static struct attribute *cca_card_attrs[] = { &dev_attr_cca_serialnr.attr, NULL, }; static const struct attribute_group cca_card_attr_grp = { .attrs = cca_card_attrs, }; /* * CCA queue additional device attributes */ static ssize_t cca_mkvps_show(struct device *dev, struct device_attribute *attr, char *buf) { int n = 0; struct cca_info ci; struct zcrypt_queue *zq = to_ap_queue(dev)->private; static const char * const cao_state[] = { "invalid", "valid" }; static const char * const new_state[] = { "empty", "partial", "full" }; memset(&ci, 0, sizeof(ci)); cca_get_info(AP_QID_CARD(zq->queue->qid), AP_QID_QUEUE(zq->queue->qid), &ci, zq->online); if (ci.new_aes_mk_state >= '1' && ci.new_aes_mk_state <= '3') n = scnprintf(buf, PAGE_SIZE, "AES NEW: %s 0x%016llx\n", new_state[ci.new_aes_mk_state - '1'], ci.new_aes_mkvp); else n = scnprintf(buf, PAGE_SIZE, "AES NEW: - -\n"); if (ci.cur_aes_mk_state >= '1' && ci.cur_aes_mk_state <= '2') n += scnprintf(buf + n, PAGE_SIZE - n, "AES CUR: %s 0x%016llx\n", cao_state[ci.cur_aes_mk_state - '1'], ci.cur_aes_mkvp); else n += scnprintf(buf + n, PAGE_SIZE - n, "AES CUR: - -\n"); if (ci.old_aes_mk_state >= '1' && ci.old_aes_mk_state <= '2') n += scnprintf(buf + n, PAGE_SIZE - n, "AES OLD: %s 0x%016llx\n", cao_state[ci.old_aes_mk_state - '1'], ci.old_aes_mkvp); else n += scnprintf(buf + n, PAGE_SIZE - n, "AES OLD: - -\n"); if (ci.new_apka_mk_state >= '1' && ci.new_apka_mk_state <= '3') n += scnprintf(buf + n, PAGE_SIZE - n, "APKA NEW: %s 0x%016llx\n", new_state[ci.new_apka_mk_state - '1'], ci.new_apka_mkvp); else n += scnprintf(buf + n, PAGE_SIZE - n, "APKA NEW: - -\n"); if (ci.cur_apka_mk_state >= '1' && ci.cur_apka_mk_state <= '2') n += scnprintf(buf + n, PAGE_SIZE - n, "APKA CUR: %s 0x%016llx\n", cao_state[ci.cur_apka_mk_state - '1'], ci.cur_apka_mkvp); else n += scnprintf(buf + n, PAGE_SIZE - n, "APKA CUR: - -\n"); if (ci.old_apka_mk_state >= '1' && ci.old_apka_mk_state <= '2') n += scnprintf(buf + n, PAGE_SIZE - n, "APKA OLD: %s 0x%016llx\n", cao_state[ci.old_apka_mk_state - '1'], ci.old_apka_mkvp); else n += scnprintf(buf + n, PAGE_SIZE - n, "APKA OLD: - -\n"); return n; } static struct device_attribute dev_attr_cca_mkvps = __ATTR(mkvps, 0444, cca_mkvps_show, NULL); static struct attribute *cca_queue_attrs[] = { &dev_attr_cca_mkvps.attr, NULL, }; static const struct attribute_group cca_queue_attr_grp = { .attrs = cca_queue_attrs, }; /** * Large random number detection function. Its sends a message to a CEX2C/CEX3C * card to find out if large random numbers are supported. * @ap_dev: pointer to the AP device. * * Returns 1 if large random numbers are supported, 0 if not and < 0 on error. */ static int zcrypt_cex2c_rng_supported(struct ap_queue *aq) { struct ap_message ap_msg; unsigned long long psmid; unsigned int domain; struct { struct type86_hdr hdr; struct type86_fmt2_ext fmt2; struct CPRBX cprbx; } __packed *reply; struct { struct type6_hdr hdr; struct CPRBX cprbx; char function_code[2]; short int rule_length; char rule[8]; short int verb_length; short int key_length; } __packed *msg; int rc, i; ap_init_message(&ap_msg); ap_msg.msg = (void *) get_zeroed_page(GFP_KERNEL); if (!ap_msg.msg) return -ENOMEM; rng_type6CPRB_msgX(&ap_msg, 4, &domain); msg = ap_msg.msg; msg->cprbx.domain = AP_QID_QUEUE(aq->qid); rc = ap_send(aq->qid, 0x0102030405060708ULL, ap_msg.msg, ap_msg.len); if (rc) goto out_free; /* Wait for the test message to complete. */ for (i = 0; i < 2 * HZ; i++) { msleep(1000 / HZ); rc = ap_recv(aq->qid, &psmid, ap_msg.msg, 4096); if (rc == 0 && psmid == 0x0102030405060708ULL) break; } if (i >= 2 * HZ) { /* Got no answer. */ rc = -ENODEV; goto out_free; } reply = ap_msg.msg; if (reply->cprbx.ccp_rtcode == 0 && reply->cprbx.ccp_rscode == 0) rc = 1; else rc = 0; out_free: free_page((unsigned long) ap_msg.msg); return rc; } /** * Probe function for CEX2C/CEX3C card devices. It always accepts the * AP device since the bus_match already checked the hardware type. * @ap_dev: pointer to the AP card device. */ static int zcrypt_cex2c_card_probe(struct ap_device *ap_dev) { /* * Normalized speed ratings per crypto adapter * MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY */ static const int CEX2C_SPEED_IDX[] = { 1000, 1400, 2400, 1100, 1500, 2600, 100, 12}; static const int CEX3C_SPEED_IDX[] = { 500, 700, 1400, 550, 800, 1500, 80, 10}; struct ap_card *ac = to_ap_card(&ap_dev->device); struct zcrypt_card *zc; int rc = 0; zc = zcrypt_card_alloc(); if (!zc) return -ENOMEM; zc->card = ac; ac->private = zc; switch (ac->ap_dev.device_type) { case AP_DEVICE_TYPE_CEX2C: zc->user_space_type = ZCRYPT_CEX2C; zc->type_string = "CEX2C"; zc->speed_rating = CEX2C_SPEED_IDX; zc->min_mod_size = CEX2C_MIN_MOD_SIZE; zc->max_mod_size = CEX2C_MAX_MOD_SIZE; zc->max_exp_bit_length = CEX2C_MAX_MOD_SIZE; break; case AP_DEVICE_TYPE_CEX3C: zc->user_space_type = ZCRYPT_CEX3C; zc->type_string = "CEX3C"; zc->speed_rating = CEX3C_SPEED_IDX; zc->min_mod_size = CEX3C_MIN_MOD_SIZE; zc->max_mod_size = CEX3C_MAX_MOD_SIZE; zc->max_exp_bit_length = CEX3C_MAX_MOD_SIZE; break; default: zcrypt_card_free(zc); return -ENODEV; } zc->online = 1; rc = zcrypt_card_register(zc); if (rc) { ac->private = NULL; zcrypt_card_free(zc); return rc; } if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) { rc = sysfs_create_group(&ap_dev->device.kobj, &cca_card_attr_grp); if (rc) { zcrypt_card_unregister(zc); ac->private = NULL; zcrypt_card_free(zc); } } return rc; } /** * This is called to remove the CEX2C/CEX3C card driver information * if an AP card device is removed. */ static void zcrypt_cex2c_card_remove(struct ap_device *ap_dev) { struct ap_card *ac = to_ap_card(&ap_dev->device); struct zcrypt_card *zc = to_ap_card(&ap_dev->device)->private; if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) sysfs_remove_group(&ap_dev->device.kobj, &cca_card_attr_grp); if (zc) zcrypt_card_unregister(zc); } static struct ap_driver zcrypt_cex2c_card_driver = { .probe = zcrypt_cex2c_card_probe, .remove = zcrypt_cex2c_card_remove, .ids = zcrypt_cex2c_card_ids, .flags = AP_DRIVER_FLAG_DEFAULT, }; /** * Probe function for CEX2C/CEX3C queue devices. It always accepts the * AP device since the bus_match already checked the hardware type. * @ap_dev: pointer to the AP card device. */ static int zcrypt_cex2c_queue_probe(struct ap_device *ap_dev) { struct ap_queue *aq = to_ap_queue(&ap_dev->device); struct zcrypt_queue *zq; int rc; zq = zcrypt_queue_alloc(CEX2C_MAX_XCRB_MESSAGE_SIZE); if (!zq) return -ENOMEM; zq->queue = aq; zq->online = 1; atomic_set(&zq->load, 0); ap_rapq(aq->qid); rc = zcrypt_cex2c_rng_supported(aq); if (rc < 0) { zcrypt_queue_free(zq); return rc; } if (rc) zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, MSGTYPE06_VARIANT_DEFAULT); else zq->ops = zcrypt_msgtype(MSGTYPE06_NAME, MSGTYPE06_VARIANT_NORNG); ap_queue_init_state(aq); ap_queue_init_reply(aq, &zq->reply); aq->request_timeout = CEX2C_CLEANUP_TIME; aq->private = zq; rc = zcrypt_queue_register(zq); if (rc) { aq->private = NULL; zcrypt_queue_free(zq); return rc; } if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) { rc = sysfs_create_group(&ap_dev->device.kobj, &cca_queue_attr_grp); if (rc) { zcrypt_queue_unregister(zq); aq->private = NULL; zcrypt_queue_free(zq); } } return rc; } /** * This is called to remove the CEX2C/CEX3C queue driver information * if an AP queue device is removed. */ static void zcrypt_cex2c_queue_remove(struct ap_device *ap_dev) { struct ap_queue *aq = to_ap_queue(&ap_dev->device); struct zcrypt_queue *zq = aq->private; if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) sysfs_remove_group(&ap_dev->device.kobj, &cca_queue_attr_grp); if (zq) zcrypt_queue_unregister(zq); } static struct ap_driver zcrypt_cex2c_queue_driver = { .probe = zcrypt_cex2c_queue_probe, .remove = zcrypt_cex2c_queue_remove, .ids = zcrypt_cex2c_queue_ids, .flags = AP_DRIVER_FLAG_DEFAULT, }; int __init zcrypt_cex2c_init(void) { int rc; rc = ap_driver_register(&zcrypt_cex2c_card_driver, THIS_MODULE, "cex2card"); if (rc) return rc; rc = ap_driver_register(&zcrypt_cex2c_queue_driver, THIS_MODULE, "cex2cqueue"); if (rc) ap_driver_unregister(&zcrypt_cex2c_card_driver); return rc; } void zcrypt_cex2c_exit(void) { ap_driver_unregister(&zcrypt_cex2c_queue_driver); ap_driver_unregister(&zcrypt_cex2c_card_driver); } module_init(zcrypt_cex2c_init); module_exit(zcrypt_cex2c_exit); |