drivers/crypto/ccree/cc_driver.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (C) 2012-2019 ARM Limited or its affiliates. */
   3
   4 #include <linux/kernel.h>
   5 #include <linux/module.h>
   6
   7 #include <linux/crypto.h>
   8 #include <linux/moduleparam.h>
   9 #include <linux/types.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/slab.h>
  13 #include <linux/spinlock.h>
  14 #include <linux/of.h>
  15 #include <linux/clk.h>
  16 #include <linux/of_address.h>
  17 #include <linux/of_device.h>
  18 #include <linux/pm_runtime.h>
  19
  20 #include "cc_driver.h"
  21 #include "cc_request_mgr.h"
  22 #include "cc_buffer_mgr.h"
  23 #include "cc_debugfs.h"
  24 #include "cc_cipher.h"
  25 #include "cc_aead.h"
  26 #include "cc_hash.h"
  27 #include "cc_sram_mgr.h"
  28 #include "cc_pm.h"
  29 #include "cc_fips.h"
  30
  31 bool cc_dump_desc;
  32 module_param_named(dump_desc, cc_dump_desc, bool, 0600);
  33 MODULE_PARM_DESC(cc_dump_desc, "Dump descriptors to kernel log as debugging aid");
  34 bool cc_dump_bytes;
  35 module_param_named(dump_bytes, cc_dump_bytes, bool, 0600);
  36 MODULE_PARM_DESC(cc_dump_bytes, "Dump buffers to kernel log as debugging aid");
  37
  38 static bool cc_sec_disable;
  39 module_param_named(sec_disable, cc_sec_disable, bool, 0600);
  40 MODULE_PARM_DESC(cc_sec_disable, "Disable security functions");
  41
  42 struct cc_hw_data {
  43         char *name;
  44         enum cc_hw_rev rev;
  45         u32 sig;
  46         u32 cidr_0123;
  47         u32 pidr_0124;
  48         int std_bodies;
  49 };
  50
  51 #define CC_NUM_IDRS 4
  52 #define CC_HW_RESET_LOOP_COUNT 10
  53
  54 /* Note: PIDR3 holds CMOD/Rev so ignored for HW identification purposes */
  55 static const u32 pidr_0124_offsets[CC_NUM_IDRS] = {
  56         CC_REG(PERIPHERAL_ID_0), CC_REG(PERIPHERAL_ID_1),
  57         CC_REG(PERIPHERAL_ID_2), CC_REG(PERIPHERAL_ID_4)
  58 };
  59
  60 static const u32 cidr_0123_offsets[CC_NUM_IDRS] = {
  61         CC_REG(COMPONENT_ID_0), CC_REG(COMPONENT_ID_1),
  62         CC_REG(COMPONENT_ID_2), CC_REG(COMPONENT_ID_3)
  63 };
  64
  65 /* Hardware revisions defs. */
  66
  67 /* The 703 is a OSCCA only variant of the 713 */
  68 static const struct cc_hw_data cc703_hw = {
  69         .name = "703", .rev = CC_HW_REV_713, .cidr_0123 = 0xB105F00DU,
  70         .pidr_0124 = 0x040BB0D0U, .std_bodies = CC_STD_OSCCA
  71 };
  72
  73 static const struct cc_hw_data cc713_hw = {
  74         .name = "713", .rev = CC_HW_REV_713, .cidr_0123 = 0xB105F00DU,
  75         .pidr_0124 = 0x040BB0D0U, .std_bodies = CC_STD_ALL
  76 };
  77
  78 static const struct cc_hw_data cc712_hw = {
  79         .name = "712", .rev = CC_HW_REV_712, .sig =  0xDCC71200U,
  80         .std_bodies = CC_STD_ALL
  81 };
  82
  83 static const struct cc_hw_data cc710_hw = {
  84         .name = "710", .rev = CC_HW_REV_710, .sig =  0xDCC63200U,
  85         .std_bodies = CC_STD_ALL
  86 };
  87
  88 static const struct cc_hw_data cc630p_hw = {
  89         .name = "630P", .rev = CC_HW_REV_630, .sig = 0xDCC63000U,
  90         .std_bodies = CC_STD_ALL
  91 };
  92
  93 static const struct of_device_id arm_ccree_dev_of_match[] = {
  94         { .compatible = "arm,cryptocell-703-ree", .data = &cc703_hw },
  95         { .compatible = "arm,cryptocell-713-ree", .data = &cc713_hw },
  96         { .compatible = "arm,cryptocell-712-ree", .data = &cc712_hw },
  97         { .compatible = "arm,cryptocell-710-ree", .data = &cc710_hw },
  98         { .compatible = "arm,cryptocell-630p-ree", .data = &cc630p_hw },
  99         {}
 100 };
 101 MODULE_DEVICE_TABLE(of, arm_ccree_dev_of_match);
 102
 103 static void init_cc_cache_params(struct cc_drvdata *drvdata)
 104 {
 105         struct device *dev = drvdata_to_dev(drvdata);
 106         u32 cache_params, ace_const, val, mask;
 107
 108         /* compute CC_AXIM_CACHE_PARAMS */
 109         cache_params = cc_ioread(drvdata, CC_REG(AXIM_CACHE_PARAMS));
 110         dev_dbg(dev, "Cache params previous: 0x%08X\n", cache_params);
 111
 112         /* non cached or write-back, write allocate */
 113         val = drvdata->coherent ? 0xb : 0x2;
 114
 115         mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_AWCACHE);
 116         cache_params &= ~mask;
 117         cache_params |= FIELD_PREP(mask, val);
 118
 119         mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_AWCACHE_LAST);
 120         cache_params &= ~mask;
 121         cache_params |= FIELD_PREP(mask, val);
 122
 123         mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_ARCACHE);
 124         cache_params &= ~mask;
 125         cache_params |= FIELD_PREP(mask, val);
 126
 127         drvdata->cache_params = cache_params;
 128
 129         dev_dbg(dev, "Cache params current: 0x%08X\n", cache_params);
 130
 131         if (drvdata->hw_rev <= CC_HW_REV_710)
 132                 return;
 133
 134         /* compute CC_AXIM_ACE_CONST */
 135         ace_const = cc_ioread(drvdata, CC_REG(AXIM_ACE_CONST));
 136         dev_dbg(dev, "ACE-const previous: 0x%08X\n", ace_const);
 137
 138         /* system or outer-sharable */
 139         val = drvdata->coherent ? 0x2 : 0x3;
 140
 141         mask = CC_GENMASK(CC_AXIM_ACE_CONST_ARDOMAIN);
 142         ace_const &= ~mask;
 143         ace_const |= FIELD_PREP(mask, val);
 144
 145         mask = CC_GENMASK(CC_AXIM_ACE_CONST_AWDOMAIN);
 146         ace_const &= ~mask;
 147         ace_const |= FIELD_PREP(mask, val);
 148
 149         dev_dbg(dev, "ACE-const current: 0x%08X\n", ace_const);
 150
 151         drvdata->ace_const = ace_const;
 152 }
 153
 154 static u32 cc_read_idr(struct cc_drvdata *drvdata, const u32 *idr_offsets)
 155 {
 156         int i;
 157         union {
 158                 u8 regs[CC_NUM_IDRS];
 159                 __le32 val;
 160         } idr;
 161
 162         for (i = 0; i < CC_NUM_IDRS; ++i)
 163                 idr.regs[i] = cc_ioread(drvdata, idr_offsets[i]);
 164
 165         return le32_to_cpu(idr.val);
 166 }
 167
 168 void __dump_byte_array(const char *name, const u8 *buf, size_t len)
 169 {
 170         char prefix[64];
 171
 172         if (!buf)
 173                 return;
 174
 175         snprintf(prefix, sizeof(prefix), "%s[%zu]: ", name, len);
 176
 177         print_hex_dump(KERN_DEBUG, prefix, DUMP_PREFIX_ADDRESS, 16, 1, buf,
 178                        len, false);
 179 }
 180
 181 static irqreturn_t cc_isr(int irq, void *dev_id)
 182 {
 183         struct cc_drvdata *drvdata = (struct cc_drvdata *)dev_id;
 184         struct device *dev = drvdata_to_dev(drvdata);
 185         u32 irr;
 186         u32 imr;
 187
 188         /* STAT_OP_TYPE_GENERIC STAT_PHASE_0: Interrupt */
 189         /* if driver suspended return, probably shared interrupt */
 190         if (pm_runtime_suspended(dev))
 191                 return IRQ_NONE;
 192
 193         /* read the interrupt status */
 194         irr = cc_ioread(drvdata, CC_REG(HOST_IRR));
 195         dev_dbg(dev, "Got IRR=0x%08X\n", irr);
 196
 197         if (irr == 0) /* Probably shared interrupt line */
 198                 return IRQ_NONE;
 199
 200         imr = cc_ioread(drvdata, CC_REG(HOST_IMR));
 201
 202         /* clear interrupt - must be before processing events */
 203         cc_iowrite(drvdata, CC_REG(HOST_ICR), irr);
 204
 205         drvdata->irq = irr;
 206         /* Completion interrupt - most probable */
 207         if (irr & drvdata->comp_mask) {
 208                 /* Mask all completion interrupts - will be unmasked in
 209                  * deferred service handler
 210                  */
 211                 cc_iowrite(drvdata, CC_REG(HOST_IMR), imr | drvdata->comp_mask);
 212                 irr &= ~drvdata->comp_mask;
 213                 complete_request(drvdata);
 214         }
 215 #ifdef CONFIG_CRYPTO_FIPS
 216         /* TEE FIPS interrupt */
 217         if (irr & CC_GPR0_IRQ_MASK) {
 218                 /* Mask interrupt - will be unmasked in Deferred service
 219                  * handler
 220                  */
 221                 cc_iowrite(drvdata, CC_REG(HOST_IMR), imr | CC_GPR0_IRQ_MASK);
 222                 irr &= ~CC_GPR0_IRQ_MASK;
 223                 fips_handler(drvdata);
 224         }
 225 #endif
 226         /* AXI error interrupt */
 227         if (irr & CC_AXI_ERR_IRQ_MASK) {
 228                 u32 axi_err;
 229
 230                 /* Read the AXI error ID */
 231                 axi_err = cc_ioread(drvdata, CC_REG(AXIM_MON_ERR));
 232                 dev_dbg(dev, "AXI completion error: axim_mon_err=0x%08X\n",
 233                         axi_err);
 234
 235                 irr &= ~CC_AXI_ERR_IRQ_MASK;
 236         }
 237
 238         if (irr) {
 239                 dev_dbg_ratelimited(dev, "IRR includes unknown cause bits (0x%08X)\n",
 240                                     irr);
 241                 /* Just warning */
 242         }
 243
 244         return IRQ_HANDLED;
 245 }
 246
 247 bool cc_wait_for_reset_completion(struct cc_drvdata *drvdata)
 248 {
 249         unsigned int val;
 250         unsigned int i;
 251
 252         /* 712/710/63 has no reset completion indication, always return true */
 253         if (drvdata->hw_rev <= CC_HW_REV_712)
 254                 return true;
 255
 256         for (i = 0; i < CC_HW_RESET_LOOP_COUNT; i++) {
 257                 /* in cc7x3 NVM_IS_IDLE indicates that CC reset is
 258                  *  completed and device is fully functional
 259                  */
 260                 val = cc_ioread(drvdata, CC_REG(NVM_IS_IDLE));
 261                 if (val & CC_NVM_IS_IDLE_MASK) {
 262                         /* hw indicate reset completed */
 263                         return true;
 264                 }
 265                 /* allow scheduling other process on the processor */
 266                 schedule();
 267         }
 268         /* reset not completed */
 269         return false;
 270 }
 271
 272 int init_cc_regs(struct cc_drvdata *drvdata)
 273 {
 274         unsigned int val;
 275         struct device *dev = drvdata_to_dev(drvdata);
 276
 277         /* Unmask all AXI interrupt sources AXI_CFG1 register   */
 278         /* AXI interrupt config are obsoleted startign at cc7x3 */
 279         if (drvdata->hw_rev <= CC_HW_REV_712) {
 280                 val = cc_ioread(drvdata, CC_REG(AXIM_CFG));
 281                 cc_iowrite(drvdata, CC_REG(AXIM_CFG), val & ~CC_AXI_IRQ_MASK);
 282                 dev_dbg(dev, "AXIM_CFG=0x%08X\n",
 283                         cc_ioread(drvdata, CC_REG(AXIM_CFG)));
 284         }
 285
 286         /* Clear all pending interrupts */
 287         val = cc_ioread(drvdata, CC_REG(HOST_IRR));
 288         dev_dbg(dev, "IRR=0x%08X\n", val);
 289         cc_iowrite(drvdata, CC_REG(HOST_ICR), val);
 290
 291         /* Unmask relevant interrupt cause */
 292         val = drvdata->comp_mask | CC_AXI_ERR_IRQ_MASK;
 293
 294         if (drvdata->hw_rev >= CC_HW_REV_712)
 295                 val |= CC_GPR0_IRQ_MASK;
 296
 297         cc_iowrite(drvdata, CC_REG(HOST_IMR), ~val);
 298
 299         cc_iowrite(drvdata, CC_REG(AXIM_CACHE_PARAMS), drvdata->cache_params);
 300         if (drvdata->hw_rev >= CC_HW_REV_712)
 301                 cc_iowrite(drvdata, CC_REG(AXIM_ACE_CONST), drvdata->ace_const);
 302
 303         return 0;
 304 }
 305
 306 static int init_cc_resources(struct platform_device *plat_dev)
 307 {
 308         struct resource *req_mem_cc_regs = NULL;
 309         struct cc_drvdata *new_drvdata;
 310         struct device *dev = &plat_dev->dev;
 311         struct device_node *np = dev->of_node;
 312         u32 val, hw_rev_pidr, sig_cidr;
 313         u64 dma_mask;
 314         const struct cc_hw_data *hw_rev;
 315         struct clk *clk;
 316         int irq;
 317         int rc = 0;
 318
 319         new_drvdata = devm_kzalloc(dev, sizeof(*new_drvdata), GFP_KERNEL);
 320         if (!new_drvdata)
 321                 return -ENOMEM;
 322
 323         hw_rev = of_device_get_match_data(dev);
 324         new_drvdata->hw_rev_name = hw_rev->name;
 325         new_drvdata->hw_rev = hw_rev->rev;
 326         new_drvdata->std_bodies = hw_rev->std_bodies;
 327
 328         if (hw_rev->rev >= CC_HW_REV_712) {
 329                 new_drvdata->axim_mon_offset = CC_REG(AXIM_MON_COMP);
 330                 new_drvdata->sig_offset = CC_REG(HOST_SIGNATURE_712);
 331                 new_drvdata->ver_offset = CC_REG(HOST_VERSION_712);
 332         } else {
 333                 new_drvdata->axim_mon_offset = CC_REG(AXIM_MON_COMP8);
 334                 new_drvdata->sig_offset = CC_REG(HOST_SIGNATURE_630);
 335                 new_drvdata->ver_offset = CC_REG(HOST_VERSION_630);
 336         }
 337
 338         new_drvdata->comp_mask = CC_COMP_IRQ_MASK;
 339
 340         platform_set_drvdata(plat_dev, new_drvdata);
 341         new_drvdata->plat_dev = plat_dev;
 342
 343         clk = devm_clk_get_optional(dev, NULL);
 344         if (IS_ERR(clk))
 345                 return dev_err_probe(dev, PTR_ERR(clk), "Error getting clock\n");
 346         new_drvdata->clk = clk;
 347
 348         new_drvdata->coherent = of_dma_is_coherent(np);
 349
 350         /* Get device resources */
 351         /* First CC registers space */
 352         req_mem_cc_regs = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
 353         /* Map registers space */
 354         new_drvdata->cc_base = devm_ioremap_resource(dev, req_mem_cc_regs);
 355         if (IS_ERR(new_drvdata->cc_base)) {
 356                 dev_err(dev, "Failed to ioremap registers");
 357                 return PTR_ERR(new_drvdata->cc_base);
 358         }
 359
 360         dev_dbg(dev, "Got MEM resource (%s): %pR\n", req_mem_cc_regs->name,
 361                 req_mem_cc_regs);
 362         dev_dbg(dev, "CC registers mapped from %pa to 0x%p\n",
 363                 &req_mem_cc_regs->start, new_drvdata->cc_base);
 364
 365         /* Then IRQ */
 366         irq = platform_get_irq(plat_dev, 0);
 367         if (irq < 0)
 368                 return irq;
 369
 370         init_completion(&new_drvdata->hw_queue_avail);
 371
 372         if (!dev->dma_mask)
 373                 dev->dma_mask = &dev->coherent_dma_mask;
 374
 375         dma_mask = DMA_BIT_MASK(DMA_BIT_MASK_LEN);
 376         while (dma_mask > 0x7fffffffUL) {
 377                 if (dma_supported(dev, dma_mask)) {
 378                         rc = dma_set_coherent_mask(dev, dma_mask);
 379                         if (!rc)
 380                                 break;
 381                 }
 382                 dma_mask >>= 1;
 383         }
 384
 385         if (rc) {
 386                 dev_err(dev, "Failed in dma_set_mask, mask=%llx\n", dma_mask);
 387                 return rc;
 388         }
 389
 390         rc = clk_prepare_enable(new_drvdata->clk);
 391         if (rc) {
 392                 dev_err(dev, "Failed to enable clock");
 393                 return rc;
 394         }
 395
 396         new_drvdata->sec_disabled = cc_sec_disable;
 397
 398         pm_runtime_set_autosuspend_delay(dev, CC_SUSPEND_TIMEOUT);
 399         pm_runtime_use_autosuspend(dev);
 400         pm_runtime_set_active(dev);
 401         pm_runtime_enable(dev);
 402         rc = pm_runtime_get_sync(dev);
 403         if (rc < 0) {
 404                 dev_err(dev, "pm_runtime_get_sync() failed: %d\n", rc);
 405                 goto post_pm_err;
 406         }
 407
 408         /* Wait for Cryptocell reset completion */
 409         if (!cc_wait_for_reset_completion(new_drvdata)) {
 410                 dev_err(dev, "Cryptocell reset not completed");
 411         }
 412
 413         if (hw_rev->rev <= CC_HW_REV_712) {
 414                 /* Verify correct mapping */
 415                 val = cc_ioread(new_drvdata, new_drvdata->sig_offset);
 416                 if (val != hw_rev->sig) {
 417                         dev_err(dev, "Invalid CC signature: SIGNATURE=0x%08X != expected=0x%08X\n",
 418                                 val, hw_rev->sig);
 419                         rc = -EINVAL;
 420                         goto post_pm_err;
 421                 }
 422                 sig_cidr = val;
 423                 hw_rev_pidr = cc_ioread(new_drvdata, new_drvdata->ver_offset);
 424         } else {
 425                 /* Verify correct mapping */
 426                 val = cc_read_idr(new_drvdata, pidr_0124_offsets);
 427                 if (val != hw_rev->pidr_0124) {
 428                         dev_err(dev, "Invalid CC PIDR: PIDR0124=0x%08X != expected=0x%08X\n",
 429                                 val,  hw_rev->pidr_0124);
 430                         rc = -EINVAL;
 431                         goto post_pm_err;
 432                 }
 433                 hw_rev_pidr = val;
 434
 435                 val = cc_read_idr(new_drvdata, cidr_0123_offsets);
 436                 if (val != hw_rev->cidr_0123) {
 437                         dev_err(dev, "Invalid CC CIDR: CIDR0123=0x%08X != expected=0x%08X\n",
 438                         val,  hw_rev->cidr_0123);
 439                         rc = -EINVAL;
 440                         goto post_pm_err;
 441                 }
 442                 sig_cidr = val;
 443
 444                 /* Check HW engine configuration */
 445                 val = cc_ioread(new_drvdata, CC_REG(HOST_REMOVE_INPUT_PINS));
 446                 switch (val) {
 447                 case CC_PINS_FULL:
 448                         /* This is fine */
 449                         break;
 450                 case CC_PINS_SLIM:
 451                         if (new_drvdata->std_bodies & CC_STD_NIST) {
 452                                 dev_warn(dev, "703 mode forced due to HW configuration.\n");
 453                                 new_drvdata->std_bodies = CC_STD_OSCCA;
 454                         }
 455                         break;
 456                 default:
 457                         dev_err(dev, "Unsupported engines configuration.\n");
 458                         rc = -EINVAL;
 459                         goto post_pm_err;
 460                 }
 461
 462                 /* Check security disable state */
 463                 val = cc_ioread(new_drvdata, CC_REG(SECURITY_DISABLED));
 464                 val &= CC_SECURITY_DISABLED_MASK;
 465                 new_drvdata->sec_disabled |= !!val;
 466
 467                 if (!new_drvdata->sec_disabled) {
 468                         new_drvdata->comp_mask |= CC_CPP_SM4_ABORT_MASK;
 469                         if (new_drvdata->std_bodies & CC_STD_NIST)
 470                                 new_drvdata->comp_mask |= CC_CPP_AES_ABORT_MASK;
 471                 }
 472         }
 473
 474         if (new_drvdata->sec_disabled)
 475                 dev_info(dev, "Security Disabled mode is in effect. Security functions disabled.\n");
 476
 477         /* Display HW versions */
 478         dev_info(dev, "ARM CryptoCell %s Driver: HW version 0x%08X/0x%8X, Driver version %s\n",
 479                  hw_rev->name, hw_rev_pidr, sig_cidr, DRV_MODULE_VERSION);
 480         /* register the driver isr function */
 481         rc = devm_request_irq(dev, irq, cc_isr, IRQF_SHARED, "ccree",
 482                               new_drvdata);
 483         if (rc) {
 484                 dev_err(dev, "Could not register to interrupt %d\n", irq);
 485                 goto post_pm_err;
 486         }
 487         dev_dbg(dev, "Registered to IRQ: %d\n", irq);
 488
 489         init_cc_cache_params(new_drvdata);
 490
 491         rc = init_cc_regs(new_drvdata);
 492         if (rc) {
 493                 dev_err(dev, "init_cc_regs failed\n");
 494                 goto post_pm_err;
 495         }
 496
 497         rc = cc_debugfs_init(new_drvdata);
 498         if (rc) {
 499                 dev_err(dev, "Failed registering debugfs interface\n");
 500                 goto post_regs_err;
 501         }
 502
 503         rc = cc_fips_init(new_drvdata);
 504         if (rc) {
 505                 dev_err(dev, "cc_fips_init failed 0x%x\n", rc);
 506                 goto post_debugfs_err;
 507         }
 508         rc = cc_sram_mgr_init(new_drvdata);
 509         if (rc) {
 510                 dev_err(dev, "cc_sram_mgr_init failed\n");
 511                 goto post_fips_init_err;
 512         }
 513
 514         new_drvdata->mlli_sram_addr =
 515                 cc_sram_alloc(new_drvdata, MAX_MLLI_BUFF_SIZE);
 516         if (new_drvdata->mlli_sram_addr == NULL_SRAM_ADDR) {
 517                 rc = -ENOMEM;
 518                 goto post_fips_init_err;
 519         }
 520
 521         rc = cc_req_mgr_init(new_drvdata);
 522         if (rc) {
 523                 dev_err(dev, "cc_req_mgr_init failed\n");
 524                 goto post_fips_init_err;
 525         }
 526
 527         rc = cc_buffer_mgr_init(new_drvdata);
 528         if (rc) {
 529                 dev_err(dev, "cc_buffer_mgr_init failed\n");
 530                 goto post_req_mgr_err;
 531         }
 532
 533         /* Allocate crypto algs */
 534         rc = cc_cipher_alloc(new_drvdata);
 535         if (rc) {
 536                 dev_err(dev, "cc_cipher_alloc failed\n");
 537                 goto post_buf_mgr_err;
 538         }
 539
 540         /* hash must be allocated before aead since hash exports APIs */
 541         rc = cc_hash_alloc(new_drvdata);
 542         if (rc) {
 543                 dev_err(dev, "cc_hash_alloc failed\n");
 544                 goto post_cipher_err;
 545         }
 546
 547         rc = cc_aead_alloc(new_drvdata);
 548         if (rc) {
 549                 dev_err(dev, "cc_aead_alloc failed\n");
 550                 goto post_hash_err;
 551         }
 552
 553         /* If we got here and FIPS mode is enabled
 554          * it means all FIPS test passed, so let TEE
 555          * know we're good.
 556          */
 557         cc_set_ree_fips_status(new_drvdata, true);
 558
 559         pm_runtime_put(dev);
 560         return 0;
 561
 562 post_hash_err:
 563         cc_hash_free(new_drvdata);
 564 post_cipher_err:
 565         cc_cipher_free(new_drvdata);
 566 post_buf_mgr_err:
 567          cc_buffer_mgr_fini(new_drvdata);
 568 post_req_mgr_err:
 569         cc_req_mgr_fini(new_drvdata);
 570 post_fips_init_err:
 571         cc_fips_fini(new_drvdata);
 572 post_debugfs_err:
 573         cc_debugfs_fini(new_drvdata);
 574 post_regs_err:
 575         fini_cc_regs(new_drvdata);
 576 post_pm_err:
 577         pm_runtime_put_noidle(dev);
 578         pm_runtime_disable(dev);
 579         pm_runtime_set_suspended(dev);
 580         clk_disable_unprepare(new_drvdata->clk);
 581         return rc;
 582 }
 583
 584 void fini_cc_regs(struct cc_drvdata *drvdata)
 585 {
 586         /* Mask all interrupts */
 587         cc_iowrite(drvdata, CC_REG(HOST_IMR), 0xFFFFFFFF);
 588 }
 589
 590 static void cleanup_cc_resources(struct platform_device *plat_dev)
 591 {
 592         struct device *dev = &plat_dev->dev;
 593         struct cc_drvdata *drvdata =
 594                 (struct cc_drvdata *)platform_get_drvdata(plat_dev);
 595
 596         cc_aead_free(drvdata);
 597         cc_hash_free(drvdata);
 598         cc_cipher_free(drvdata);
 599         cc_buffer_mgr_fini(drvdata);
 600         cc_req_mgr_fini(drvdata);
 601         cc_fips_fini(drvdata);
 602         cc_debugfs_fini(drvdata);
 603         fini_cc_regs(drvdata);
 604         pm_runtime_put_noidle(dev);
 605         pm_runtime_disable(dev);
 606         pm_runtime_set_suspended(dev);
 607         clk_disable_unprepare(drvdata->clk);
 608 }
 609
 610 unsigned int cc_get_default_hash_len(struct cc_drvdata *drvdata)
 611 {
 612         if (drvdata->hw_rev >= CC_HW_REV_712)
 613                 return HASH_LEN_SIZE_712;
 614         else
 615                 return HASH_LEN_SIZE_630;
 616 }
 617
 618 static int ccree_probe(struct platform_device *plat_dev)
 619 {
 620         int rc;
 621         struct device *dev = &plat_dev->dev;
 622
 623         /* Map registers space */
 624         rc = init_cc_resources(plat_dev);
 625         if (rc)
 626                 return rc;
 627
 628         dev_info(dev, "ARM ccree device initialized\n");
 629
 630         return 0;
 631 }
 632
 633 static int ccree_remove(struct platform_device *plat_dev)
 634 {
 635         struct device *dev = &plat_dev->dev;
 636
 637         dev_dbg(dev, "Releasing ccree resources...\n");
 638
 639         cleanup_cc_resources(plat_dev);
 640
 641         dev_info(dev, "ARM ccree device terminated\n");
 642
 643         return 0;
 644 }
 645
 646 static struct platform_driver ccree_driver = {
 647         .driver = {
 648                    .name = "ccree",
 649                    .of_match_table = arm_ccree_dev_of_match,
 650 #ifdef CONFIG_PM
 651                    .pm = &ccree_pm,
 652 #endif
 653         },
 654         .probe = ccree_probe,
 655         .remove = ccree_remove,
 656 };
 657
 658 static int __init ccree_init(void)
 659 {
 660         cc_debugfs_global_init();
 661
 662         return platform_driver_register(&ccree_driver);
 663 }
 664 module_init(ccree_init);
 665
 666 static void __exit ccree_exit(void)
 667 {
 668         platform_driver_unregister(&ccree_driver);
 669         cc_debugfs_global_fini();
 670 }
 671 module_exit(ccree_exit);
 672
 673 /* Module description */
 674 MODULE_DESCRIPTION("ARM TrustZone CryptoCell REE Driver");
 675 MODULE_VERSION(DRV_MODULE_VERSION);
 676 MODULE_AUTHOR("ARM");
 677 MODULE_LICENSE("GPL v2");