linux/drivers/crypto/caam/ctrl.c
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   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 */
  23static 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. */
  59static 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 */
  80static 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 */
 161static 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 */
 230static 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
 270static 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 */
 311static 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 **/
 359int 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}
 384EXPORT_SYMBOL(caam_get_era);
 385
 386/* Probe routine for CAAM top (controller) level */
 387static 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
 654static struct of_device_id caam_match[] = {
 655        {
 656                .compatible = "fsl,sec-v4.0",
 657        },
 658        {
 659                .compatible = "fsl,sec4.0",
 660        },
 661        {},
 662};
 663MODULE_DEVICE_TABLE(of, caam_match);
 664
 665static 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
 675module_platform_driver(caam_driver);
 676
 677MODULE_LICENSE("GPL");
 678MODULE_DESCRIPTION("FSL CAAM request backend");
 679MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");
 680
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