drivers/crypto/caam/ctrl.c

   1 /*
   2  * CAAM control-plane driver backend
   3  * Controller-level driver, kernel property detection, initialization
   4  *
   5  * Copyright 2008-2012 Freescale Semiconductor, Inc.
   6  */
   7
   8 #include <linux/of_address.h>
   9 #include <linux/of_irq.h>
  10
  11 #include "compat.h"
  12 #include "regs.h"
  13 #include "intern.h"
  14 #include "jr.h"
  15 #include "desc_constr.h"
  16 #include "error.h"
  17 #include "ctrl.h"
  18
  19 /*
  20  * Descriptor to instantiate RNG State Handle 0 in normal mode and
  21  * load the JDKEK, TDKEK and TDSK registers
  22  */
  23 static void build_instantiation_desc(u32 *desc, int handle, int do_sk)
  24 {
  25         u32 *jump_cmd, op_flags;
  26
  27         init_job_desc(desc, 0);
  28
  29         op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
  30                         (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT;
  31
  32         /* INIT RNG in non-test mode */
  33         append_operation(desc, op_flags);
  34
  35         if (!handle && do_sk) {
  36                 /*
  37                  * For SH0, Secure Keys must be generated as well
  38                  */
  39
  40                 /* wait for done */
  41                 jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
  42                 set_jump_tgt_here(desc, jump_cmd);
  43
  44                 /*
  45                  * load 1 to clear written reg:
  46                  * resets the done interrrupt and returns the RNG to idle.
  47                  */
  48                 append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
  49
  50                 /* Initialize State Handle  */
  51                 append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
  52                                  OP_ALG_AAI_RNG4_SK);
  53         }
  54
  55         append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
  56 }
  57
  58 /* Descriptor for deinstantiation of State Handle 0 of the RNG block. */
  59 static void build_deinstantiation_desc(u32 *desc, int handle)
  60 {
  61         init_job_desc(desc, 0);
  62
  63         /* Uninstantiate State Handle 0 */
  64         append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
  65                          (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INITFINAL);
  66
  67         append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
  68 }
  69
  70 /*
  71  * run_descriptor_deco0 - runs a descriptor on DECO0, under direct control of
  72  *                        the software (no JR/QI used).
  73  * @ctrldev - pointer to device
  74  * @status - descriptor status, after being run
  75  *
  76  * Return: - 0 if no error occurred
  77  *         - -ENODEV if the DECO couldn't be acquired
  78  *         - -EAGAIN if an error occurred while executing the descriptor
  79  */
  80 static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
  81                                         u32 *status)
  82 {
  83         struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
  84         struct caam_full __iomem *topregs;
  85         unsigned int timeout = 100000;
  86         u32 deco_dbg_reg, flags;
  87         int i;
  88
  89         /* Set the bit to request direct access to DECO0 */
  90         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
  91         setbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
  92
  93         while (!(rd_reg32(&topregs->ctrl.deco_rq) & DECORR_DEN0) &&
  94                                                                  --timeout)
  95                 cpu_relax();
  96
  97         if (!timeout) {
  98                 dev_err(ctrldev, "failed to acquire DECO 0\n");
  99                 clrbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
 100                 return -ENODEV;
 101         }
 102
 103         for (i = 0; i < desc_len(desc); i++)
 104                 wr_reg32(&topregs->deco.descbuf[i], *(desc + i));
 105
 106         flags = DECO_JQCR_WHL;
 107         /*
 108          * If the descriptor length is longer than 4 words, then the
 109          * FOUR bit in JRCTRL register must be set.
 110          */
 111         if (desc_len(desc) >= 4)
 112                 flags |= DECO_JQCR_FOUR;
 113
 114         /* Instruct the DECO to execute it */
 115         wr_reg32(&topregs->deco.jr_ctl_hi, flags);
 116
 117         timeout = 10000000;
 118         do {
 119                 deco_dbg_reg = rd_reg32(&topregs->deco.desc_dbg);
 120                 /*
 121                  * If an error occured in the descriptor, then
 122                  * the DECO status field will be set to 0x0D
 123                  */
 124                 if ((deco_dbg_reg & DESC_DBG_DECO_STAT_MASK) ==
 125                     DESC_DBG_DECO_STAT_HOST_ERR)
 126                         break;
 127                 cpu_relax();
 128         } while ((deco_dbg_reg & DESC_DBG_DECO_STAT_VALID) && --timeout);
 129
 130         *status = rd_reg32(&topregs->deco.op_status_hi) &
 131                   DECO_OP_STATUS_HI_ERR_MASK;
 132
 133         /* Mark the DECO as free */
 134         clrbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
 135
 136         if (!timeout)
 137                 return -EAGAIN;
 138
 139         return 0;
 140 }
 141
 142 /*
 143  * instantiate_rng - builds and executes a descriptor on DECO0,
 144  *                   which initializes the RNG block.
 145  * @ctrldev - pointer to device
 146  * @state_handle_mask - bitmask containing the instantiation status
 147  *                      for the RNG4 state handles which exist in
 148  *                      the RNG4 block: 1 if it's been instantiated
 149  *                      by an external entry, 0 otherwise.
 150  * @gen_sk  - generate data to be loaded into the JDKEK, TDKEK and TDSK;
 151  *            Caution: this can be done only once; if the keys need to be
 152  *            regenerated, a POR is required
 153  *
 154  * Return: - 0 if no error occurred
 155  *         - -ENOMEM if there isn't enough memory to allocate the descriptor
 156  *         - -ENODEV if DECO0 couldn't be acquired
 157  *         - -EAGAIN if an error occurred when executing the descriptor
 158  *            f.i. there was a RNG hardware error due to not "good enough"
 159  *            entropy being aquired.
 160  */
 161 static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
 162                            int gen_sk)
 163 {
 164         struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
 165         struct caam_full __iomem *topregs;
 166         struct rng4tst __iomem *r4tst;
 167         u32 *desc, status, rdsta_val;
 168         int ret = 0, sh_idx;
 169
 170         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
 171         r4tst = &topregs->ctrl.r4tst[0];
 172
 173         desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL);
 174         if (!desc)
 175                 return -ENOMEM;
 176
 177         for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
 178                 /*
 179                  * If the corresponding bit is set, this state handle
 180                  * was initialized by somebody else, so it's left alone.
 181                  */
 182                 if ((1 << sh_idx) & state_handle_mask)
 183                         continue;
 184
 185                 /* Create the descriptor for instantiating RNG State Handle */
 186                 build_instantiation_desc(desc, sh_idx, gen_sk);
 187
 188                 /* Try to run it through DECO0 */
 189                 ret = run_descriptor_deco0(ctrldev, desc, &status);
 190
 191                 /*
 192                  * If ret is not 0, or descriptor status is not 0, then
 193                  * something went wrong. No need to try the next state
 194                  * handle (if available), bail out here.
 195                  * Also, if for some reason, the State Handle didn't get
 196                  * instantiated although the descriptor has finished
 197                  * without any error (HW optimizations for later
 198                  * CAAM eras), then try again.
 199                  */
 200                 rdsta_val =
 201                         rd_reg32(&topregs->ctrl.r4tst[0].rdsta) & RDSTA_IFMASK;
 202                 if (status || !(rdsta_val & (1 << sh_idx)))
 203                         ret = -EAGAIN;
 204                 if (ret)
 205                         break;
 206
 207                 dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx);
 208                 /* Clear the contents before recreating the descriptor */
 209                 memset(desc, 0x00, CAAM_CMD_SZ * 7);
 210         }
 211
 212         kfree(desc);
 213
 214         return ret;
 215 }
 216
 217 /*
 218  * deinstantiate_rng - builds and executes a descriptor on DECO0,
 219  *                     which deinitializes the RNG block.
 220  * @ctrldev - pointer to device
 221  * @state_handle_mask - bitmask containing the instantiation status
 222  *                      for the RNG4 state handles which exist in
 223  *                      the RNG4 block: 1 if it's been instantiated
 224  *
 225  * Return: - 0 if no error occurred
 226  *         - -ENOMEM if there isn't enough memory to allocate the descriptor
 227  *         - -ENODEV if DECO0 couldn't be acquired
 228  *         - -EAGAIN if an error occurred when executing the descriptor
 229  */
 230 static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask)
 231 {
 232         u32 *desc, status;
 233         int sh_idx, ret = 0;
 234
 235         desc = kmalloc(CAAM_CMD_SZ * 3, GFP_KERNEL);
 236         if (!desc)
 237                 return -ENOMEM;
 238
 239         for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
 240                 /*
 241                  * If the corresponding bit is set, then it means the state
 242                  * handle was initialized by us, and thus it needs to be
 243                  * deintialized as well
 244                  */
 245                 if ((1 << sh_idx) & state_handle_mask) {
 246                         /*
 247                          * Create the descriptor for deinstantating this state
 248                          * handle
 249                          */
 250                         build_deinstantiation_desc(desc, sh_idx);
 251
 252                         /* Try to run it through DECO0 */
 253                         ret = run_descriptor_deco0(ctrldev, desc, &status);
 254
 255                         if (ret || status) {
 256                                 dev_err(ctrldev,
 257                                         "Failed to deinstantiate RNG4 SH%d\n",
 258                                         sh_idx);
 259                                 break;
 260                         }
 261                         dev_info(ctrldev, "Deinstantiated RNG4 SH%d\n", sh_idx);
 262                 }
 263         }
 264
 265         kfree(desc);
 266
 267         return ret;
 268 }
 269
 270 static int caam_remove(struct platform_device *pdev)
 271 {
 272         struct device *ctrldev;
 273         struct caam_drv_private *ctrlpriv;
 274         struct caam_full __iomem *topregs;
 275         int ring, ret = 0;
 276
 277         ctrldev = &pdev->dev;
 278         ctrlpriv = dev_get_drvdata(ctrldev);
 279         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
 280
 281         /* Remove platform devices for JobRs */
 282         for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) {
 283                 if (ctrlpriv->jrpdev[ring])
 284                         of_device_unregister(ctrlpriv->jrpdev[ring]);
 285         }
 286
 287         /* De-initialize RNG state handles initialized by this driver. */
 288         if (ctrlpriv->rng4_sh_init)
 289                 deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
 290
 291         /* Shut down debug views */
 292 #ifdef CONFIG_DEBUG_FS
 293         debugfs_remove_recursive(ctrlpriv->dfs_root);
 294 #endif
 295
 296         /* Unmap controller region */
 297         iounmap(&topregs->ctrl);
 298
 299         kfree(ctrlpriv->jrpdev);
 300         kfree(ctrlpriv);
 301
 302         return ret;
 303 }
 304
 305 /*
 306  * kick_trng - sets the various parameters for enabling the initialization
 307  *             of the RNG4 block in CAAM
 308  * @pdev - pointer to the platform device
 309  * @ent_delay - Defines the length (in system clocks) of each entropy sample.
 310  */
 311 static void kick_trng(struct platform_device *pdev, int ent_delay)
 312 {
 313         struct device *ctrldev = &pdev->dev;
 314         struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
 315         struct caam_full __iomem *topregs;
 316         struct rng4tst __iomem *r4tst;
 317         u32 val;
 318
 319         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
 320         r4tst = &topregs->ctrl.r4tst[0];
 321
 322         /* put RNG4 into program mode */
 323         setbits32(&r4tst->rtmctl, RTMCTL_PRGM);
 324
 325         /*
 326          * Performance-wise, it does not make sense to
 327          * set the delay to a value that is lower
 328          * than the last one that worked (i.e. the state handles
 329          * were instantiated properly. Thus, instead of wasting
 330          * time trying to set the values controlling the sample
 331          * frequency, the function simply returns.
 332          */
 333         val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK)
 334               >> RTSDCTL_ENT_DLY_SHIFT;
 335         if (ent_delay <= val) {
 336                 /* put RNG4 into run mode */
 337                 clrbits32(&r4tst->rtmctl, RTMCTL_PRGM);
 338                 return;
 339         }
 340
 341         val = rd_reg32(&r4tst->rtsdctl);
 342         val = (val & ~RTSDCTL_ENT_DLY_MASK) |
 343               (ent_delay << RTSDCTL_ENT_DLY_SHIFT);
 344         wr_reg32(&r4tst->rtsdctl, val);
 345         /* min. freq. count, equal to 1/4 of the entropy sample length */
 346         wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2);
 347         /* max. freq. count, equal to 8 times the entropy sample length */
 348         wr_reg32(&r4tst->rtfrqmax, ent_delay << 3);
 349         /* put RNG4 into run mode */
 350         clrbits32(&r4tst->rtmctl, RTMCTL_PRGM);
 351 }
 352
 353 /**
 354  * caam_get_era() - Return the ERA of the SEC on SoC, based
 355  * on the SEC_VID register.
 356  * Returns the ERA number (1..4) or -ENOTSUPP if the ERA is unknown.
 357  * @caam_id - the value of the SEC_VID register
 358  **/
 359 int caam_get_era(u64 caam_id)
 360 {
 361         struct sec_vid *sec_vid = (struct sec_vid *)&caam_id;
 362         static const struct {
 363                 u16 ip_id;
 364                 u8 maj_rev;
 365                 u8 era;
 366         } caam_eras[] = {
 367                 {0x0A10, 1, 1},
 368                 {0x0A10, 2, 2},
 369                 {0x0A12, 1, 3},
 370                 {0x0A14, 1, 3},
 371                 {0x0A14, 2, 4},
 372                 {0x0A16, 1, 4},
 373                 {0x0A11, 1, 4}
 374         };
 375         int i;
 376
 377         for (i = 0; i < ARRAY_SIZE(caam_eras); i++)
 378                 if (caam_eras[i].ip_id == sec_vid->ip_id &&
 379                         caam_eras[i].maj_rev == sec_vid->maj_rev)
 380                                 return caam_eras[i].era;
 381
 382         return -ENOTSUPP;
 383 }
 384 EXPORT_SYMBOL(caam_get_era);
 385
 386 /* Probe routine for CAAM top (controller) level */
 387 static int caam_probe(struct platform_device *pdev)
 388 {
 389         int ret, ring, rspec, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
 390         u64 caam_id;
 391         struct device *dev;
 392         struct device_node *nprop, *np;
 393         struct caam_ctrl __iomem *ctrl;
 394         struct caam_full __iomem *topregs;
 395         struct caam_drv_private *ctrlpriv;
 396 #ifdef CONFIG_DEBUG_FS
 397         struct caam_perfmon *perfmon;
 398 #endif
 399         u64 cha_vid;
 400
 401         ctrlpriv = kzalloc(sizeof(struct caam_drv_private), GFP_KERNEL);
 402         if (!ctrlpriv)
 403                 return -ENOMEM;
 404
 405         dev = &pdev->dev;
 406         dev_set_drvdata(dev, ctrlpriv);
 407         ctrlpriv->pdev = pdev;
 408         nprop = pdev->dev.of_node;
 409
 410         /* Get configuration properties from device tree */
 411         /* First, get register page */
 412         ctrl = of_iomap(nprop, 0);
 413         if (ctrl == NULL) {
 414                 dev_err(dev, "caam: of_iomap() failed\n");
 415                 return -ENOMEM;
 416         }
 417         ctrlpriv->ctrl = (struct caam_ctrl __force *)ctrl;
 418
 419         /* topregs used to derive pointers to CAAM sub-blocks only */
 420         topregs = (struct caam_full __iomem *)ctrl;
 421
 422         /* Get the IRQ of the controller (for security violations only) */
 423         ctrlpriv->secvio_irq = irq_of_parse_and_map(nprop, 0);
 424
 425         /*
 426          * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
 427          * long pointers in master configuration register
 428          */
 429         setbits32(&topregs->ctrl.mcr, MCFGR_WDENABLE |
 430                   (sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0));
 431
 432         if (sizeof(dma_addr_t) == sizeof(u64))
 433                 if (of_device_is_compatible(nprop, "fsl,sec-v5.0"))
 434                         dma_set_mask(dev, DMA_BIT_MASK(40));
 435                 else
 436                         dma_set_mask(dev, DMA_BIT_MASK(36));
 437         else
 438                 dma_set_mask(dev, DMA_BIT_MASK(32));
 439
 440         /*
 441          * Detect and enable JobRs
 442          * First, find out how many ring spec'ed, allocate references
 443          * for all, then go probe each one.
 444          */
 445         rspec = 0;
 446         for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring")
 447                 rspec++;
 448         if (!rspec) {
 449                 /* for backward compatible with device trees */
 450                 for_each_compatible_node(np, NULL, "fsl,sec4.0-job-ring")
 451                         rspec++;
 452         }
 453
 454         ctrlpriv->jrpdev = kzalloc(sizeof(struct platform_device *) * rspec,
 455                                                                 GFP_KERNEL);
 456         if (ctrlpriv->jrpdev == NULL) {
 457                 iounmap(&topregs->ctrl);
 458                 return -ENOMEM;
 459         }
 460
 461         ring = 0;
 462         ctrlpriv->total_jobrs = 0;
 463         for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring") {
 464                 ctrlpriv->jrpdev[ring] =
 465                                 of_platform_device_create(np, NULL, dev);
 466                 if (!ctrlpriv->jrpdev[ring]) {
 467                         pr_warn("JR%d Platform device creation error\n", ring);
 468                         continue;
 469                 }
 470                 ctrlpriv->total_jobrs++;
 471                 ring++;
 472         }
 473         if (!ring) {
 474                 for_each_compatible_node(np, NULL, "fsl,sec4.0-job-ring") {
 475                         ctrlpriv->jrpdev[ring] =
 476                                 of_platform_device_create(np, NULL, dev);
 477                         if (!ctrlpriv->jrpdev[ring]) {
 478                                 pr_warn("JR%d Platform device creation error\n",
 479                                         ring);
 480                                 continue;
 481                         }
 482                         ctrlpriv->total_jobrs++;
 483                         ring++;
 484                 }
 485         }
 486
 487         /* Check to see if QI present. If so, enable */
 488         ctrlpriv->qi_present = !!(rd_reg64(&topregs->ctrl.perfmon.comp_parms) &
 489                                   CTPR_QI_MASK);
 490         if (ctrlpriv->qi_present) {
 491                 ctrlpriv->qi = (struct caam_queue_if __force *)&topregs->qi;
 492                 /* This is all that's required to physically enable QI */
 493                 wr_reg32(&topregs->qi.qi_control_lo, QICTL_DQEN);
 494         }
 495
 496         /* If no QI and no rings specified, quit and go home */
 497         if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) {
 498                 dev_err(dev, "no queues configured, terminating\n");
 499                 caam_remove(pdev);
 500                 return -ENOMEM;
 501         }
 502
 503         cha_vid = rd_reg64(&topregs->ctrl.perfmon.cha_id);
 504
 505         /*
 506          * If SEC has RNG version >= 4 and RNG state handle has not been
 507          * already instantiated, do RNG instantiation
 508          */
 509         if ((cha_vid & CHA_ID_RNG_MASK) >> CHA_ID_RNG_SHIFT >= 4) {
 510                 ctrlpriv->rng4_sh_init =
 511                         rd_reg32(&topregs->ctrl.r4tst[0].rdsta);
 512                 /*
 513                  * If the secure keys (TDKEK, JDKEK, TDSK), were already
 514                  * generated, signal this to the function that is instantiating
 515                  * the state handles. An error would occur if RNG4 attempts
 516                  * to regenerate these keys before the next POR.
 517                  */
 518                 gen_sk = ctrlpriv->rng4_sh_init & RDSTA_SKVN ? 0 : 1;
 519                 ctrlpriv->rng4_sh_init &= RDSTA_IFMASK;
 520                 do {
 521                         int inst_handles =
 522                                 rd_reg32(&topregs->ctrl.r4tst[0].rdsta) &
 523                                                                 RDSTA_IFMASK;
 524                         /*
 525                          * If either SH were instantiated by somebody else
 526                          * (e.g. u-boot) then it is assumed that the entropy
 527                          * parameters are properly set and thus the function
 528                          * setting these (kick_trng(...)) is skipped.
 529                          * Also, if a handle was instantiated, do not change
 530                          * the TRNG parameters.
 531                          */
 532                         if (!(ctrlpriv->rng4_sh_init || inst_handles)) {
 533                                 kick_trng(pdev, ent_delay);
 534                                 ent_delay += 400;
 535                         }
 536                         /*
 537                          * if instantiate_rng(...) fails, the loop will rerun
 538                          * and the kick_trng(...) function will modfiy the
 539                          * upper and lower limits of the entropy sampling
 540                          * interval, leading to a sucessful initialization of
 541                          * the RNG.
 542                          */
 543                         ret = instantiate_rng(dev, inst_handles,
 544                                               gen_sk);
 545                 } while ((ret == -EAGAIN) && (ent_delay < RTSDCTL_ENT_DLY_MAX));
 546                 if (ret) {
 547                         dev_err(dev, "failed to instantiate RNG");
 548                         caam_remove(pdev);
 549                         return ret;
 550                 }
 551                 /*
 552                  * Set handles init'ed by this module as the complement of the
 553                  * already initialized ones
 554                  */
 555                 ctrlpriv->rng4_sh_init = ~ctrlpriv->rng4_sh_init & RDSTA_IFMASK;
 556
 557                 /* Enable RDB bit so that RNG works faster */
 558                 setbits32(&topregs->ctrl.scfgr, SCFGR_RDBENABLE);
 559         }
 560
 561         /* NOTE: RTIC detection ought to go here, around Si time */
 562
 563         caam_id = rd_reg64(&topregs->ctrl.perfmon.caam_id);
 564
 565         /* Report "alive" for developer to see */
 566         dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
 567                  caam_get_era(caam_id));
 568         dev_info(dev, "job rings = %d, qi = %d\n",
 569                  ctrlpriv->total_jobrs, ctrlpriv->qi_present);
 570
 571 #ifdef CONFIG_DEBUG_FS
 572         /*
 573          * FIXME: needs better naming distinction, as some amalgamation of
 574          * "caam" and nprop->full_name. The OF name isn't distinctive,
 575          * but does separate instances
 576          */
 577         perfmon = (struct caam_perfmon __force *)&ctrl->perfmon;
 578
 579         ctrlpriv->dfs_root = debugfs_create_dir("caam", NULL);
 580         ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root);
 581
 582         /* Controller-level - performance monitor counters */
 583         ctrlpriv->ctl_rq_dequeued =
 584                 debugfs_create_u64("rq_dequeued",
 585                                    S_IRUSR | S_IRGRP | S_IROTH,
 586                                    ctrlpriv->ctl, &perfmon->req_dequeued);
 587         ctrlpriv->ctl_ob_enc_req =
 588                 debugfs_create_u64("ob_rq_encrypted",
 589                                    S_IRUSR | S_IRGRP | S_IROTH,
 590                                    ctrlpriv->ctl, &perfmon->ob_enc_req);
 591         ctrlpriv->ctl_ib_dec_req =
 592                 debugfs_create_u64("ib_rq_decrypted",
 593                                    S_IRUSR | S_IRGRP | S_IROTH,
 594                                    ctrlpriv->ctl, &perfmon->ib_dec_req);
 595         ctrlpriv->ctl_ob_enc_bytes =
 596                 debugfs_create_u64("ob_bytes_encrypted",
 597                                    S_IRUSR | S_IRGRP | S_IROTH,
 598                                    ctrlpriv->ctl, &perfmon->ob_enc_bytes);
 599         ctrlpriv->ctl_ob_prot_bytes =
 600                 debugfs_create_u64("ob_bytes_protected",
 601                                    S_IRUSR | S_IRGRP | S_IROTH,
 602                                    ctrlpriv->ctl, &perfmon->ob_prot_bytes);
 603         ctrlpriv->ctl_ib_dec_bytes =
 604                 debugfs_create_u64("ib_bytes_decrypted",
 605                                    S_IRUSR | S_IRGRP | S_IROTH,
 606                                    ctrlpriv->ctl, &perfmon->ib_dec_bytes);
 607         ctrlpriv->ctl_ib_valid_bytes =
 608                 debugfs_create_u64("ib_bytes_validated",
 609                                    S_IRUSR | S_IRGRP | S_IROTH,
 610                                    ctrlpriv->ctl, &perfmon->ib_valid_bytes);
 611
 612         /* Controller level - global status values */
 613         ctrlpriv->ctl_faultaddr =
 614                 debugfs_create_u64("fault_addr",
 615                                    S_IRUSR | S_IRGRP | S_IROTH,
 616                                    ctrlpriv->ctl, &perfmon->faultaddr);
 617         ctrlpriv->ctl_faultdetail =
 618                 debugfs_create_u32("fault_detail",
 619                                    S_IRUSR | S_IRGRP | S_IROTH,
 620                                    ctrlpriv->ctl, &perfmon->faultdetail);
 621         ctrlpriv->ctl_faultstatus =
 622                 debugfs_create_u32("fault_status",
 623                                    S_IRUSR | S_IRGRP | S_IROTH,
 624                                    ctrlpriv->ctl, &perfmon->status);
 625
 626         /* Internal covering keys (useful in non-secure mode only) */
 627         ctrlpriv->ctl_kek_wrap.data = &ctrlpriv->ctrl->kek[0];
 628         ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
 629         ctrlpriv->ctl_kek = debugfs_create_blob("kek",
 630                                                 S_IRUSR |
 631                                                 S_IRGRP | S_IROTH,
 632                                                 ctrlpriv->ctl,
 633                                                 &ctrlpriv->ctl_kek_wrap);
 634
 635         ctrlpriv->ctl_tkek_wrap.data = &ctrlpriv->ctrl->tkek[0];
 636         ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
 637         ctrlpriv->ctl_tkek = debugfs_create_blob("tkek",
 638                                                  S_IRUSR |
 639                                                  S_IRGRP | S_IROTH,
 640                                                  ctrlpriv->ctl,
 641                                                  &ctrlpriv->ctl_tkek_wrap);
 642
 643         ctrlpriv->ctl_tdsk_wrap.data = &ctrlpriv->ctrl->tdsk[0];
 644         ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32);
 645         ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk",
 646                                                  S_IRUSR |
 647                                                  S_IRGRP | S_IROTH,
 648                                                  ctrlpriv->ctl,
 649                                                  &ctrlpriv->ctl_tdsk_wrap);
 650 #endif
 651         return 0;
 652 }
 653
 654 static struct of_device_id caam_match[] = {
 655         {
 656                 .compatible = "fsl,sec-v4.0",
 657         },
 658         {
 659                 .compatible = "fsl,sec4.0",
 660         },
 661         {},
 662 };
 663 MODULE_DEVICE_TABLE(of, caam_match);
 664
 665 static struct platform_driver caam_driver = {
 666         .driver = {
 667                 .name = "caam",
 668                 .owner = THIS_MODULE,
 669                 .of_match_table = caam_match,
 670         },
 671         .probe       = caam_probe,
 672         .remove      = caam_remove,
 673 };
 674
 675 module_platform_driver(caam_driver);
 676
 677 MODULE_LICENSE("GPL");
 678 MODULE_DESCRIPTION("FSL CAAM request backend");
 679 MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");