uboot/drivers/crypto/fsl/jr.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright 2008-2014 Freescale Semiconductor, Inc.
   4 *
   5 * Based on CAAM driver in drivers/crypto/caam in Linux
   6 */
   7
   8#include <common.h>
   9#include <cpu_func.h>
  10#include <linux/kernel.h>
  11#include <log.h>
  12#include <malloc.h>
  13#include "fsl_sec.h"
  14#include "jr.h"
  15#include "jobdesc.h"
  16#include "desc_constr.h"
  17#include <time.h>
  18#include <asm/cache.h>
  19#ifdef CONFIG_FSL_CORENET
  20#include <asm/cache.h>
  21#include <asm/fsl_pamu.h>
  22#endif
  23#include <dm/lists.h>
  24
  25#define CIRC_CNT(head, tail, size)      (((head) - (tail)) & (size - 1))
  26#define CIRC_SPACE(head, tail, size)    CIRC_CNT((tail), (head) + 1, (size))
  27
  28uint32_t sec_offset[CONFIG_SYS_FSL_MAX_NUM_OF_SEC] = {
  29        0,
  30#if defined(CONFIG_ARCH_C29X)
  31        CONFIG_SYS_FSL_SEC_IDX_OFFSET,
  32        2 * CONFIG_SYS_FSL_SEC_IDX_OFFSET
  33#endif
  34};
  35
  36#define SEC_ADDR(idx)   \
  37        ((CONFIG_SYS_FSL_SEC_ADDR + sec_offset[idx]))
  38
  39#define SEC_JR0_ADDR(idx)       \
  40        (SEC_ADDR(idx) +        \
  41         (CONFIG_SYS_FSL_JR0_OFFSET - CONFIG_SYS_FSL_SEC_OFFSET))
  42
  43struct jobring jr0[CONFIG_SYS_FSL_MAX_NUM_OF_SEC];
  44
  45static inline void start_jr0(uint8_t sec_idx)
  46{
  47        ccsr_sec_t *sec = (void *)SEC_ADDR(sec_idx);
  48        u32 ctpr_ms = sec_in32(&sec->ctpr_ms);
  49        u32 scfgr = sec_in32(&sec->scfgr);
  50
  51        if (ctpr_ms & SEC_CTPR_MS_VIRT_EN_INCL) {
  52                /* VIRT_EN_INCL = 1 & VIRT_EN_POR = 1 or
  53                 * VIRT_EN_INCL = 1 & VIRT_EN_POR = 0 & SEC_SCFGR_VIRT_EN = 1
  54                 */
  55                if ((ctpr_ms & SEC_CTPR_MS_VIRT_EN_POR) ||
  56                    (scfgr & SEC_SCFGR_VIRT_EN))
  57                        sec_out32(&sec->jrstartr, CONFIG_JRSTARTR_JR0);
  58        } else {
  59                /* VIRT_EN_INCL = 0 && VIRT_EN_POR_VALUE = 1 */
  60                if (ctpr_ms & SEC_CTPR_MS_VIRT_EN_POR)
  61                        sec_out32(&sec->jrstartr, CONFIG_JRSTARTR_JR0);
  62        }
  63}
  64
  65static inline void jr_reset_liodn(uint8_t sec_idx)
  66{
  67        ccsr_sec_t *sec = (void *)SEC_ADDR(sec_idx);
  68        sec_out32(&sec->jrliodnr[0].ls, 0);
  69}
  70
  71static inline void jr_disable_irq(uint8_t sec_idx)
  72{
  73        struct jr_regs *regs = (struct jr_regs *)SEC_JR0_ADDR(sec_idx);
  74        uint32_t jrcfg = sec_in32(&regs->jrcfg1);
  75
  76        jrcfg = jrcfg | JR_INTMASK;
  77
  78        sec_out32(&regs->jrcfg1, jrcfg);
  79}
  80
  81static void jr_initregs(uint8_t sec_idx)
  82{
  83        struct jr_regs *regs = (struct jr_regs *)SEC_JR0_ADDR(sec_idx);
  84        struct jobring *jr = &jr0[sec_idx];
  85        phys_addr_t ip_base = virt_to_phys((void *)jr->input_ring);
  86        phys_addr_t op_base = virt_to_phys((void *)jr->output_ring);
  87
  88#ifdef CONFIG_PHYS_64BIT
  89        sec_out32(&regs->irba_h, ip_base >> 32);
  90#else
  91        sec_out32(&regs->irba_h, 0x0);
  92#endif
  93        sec_out32(&regs->irba_l, (uint32_t)ip_base);
  94#ifdef CONFIG_PHYS_64BIT
  95        sec_out32(&regs->orba_h, op_base >> 32);
  96#else
  97        sec_out32(&regs->orba_h, 0x0);
  98#endif
  99        sec_out32(&regs->orba_l, (uint32_t)op_base);
 100        sec_out32(&regs->ors, JR_SIZE);
 101        sec_out32(&regs->irs, JR_SIZE);
 102
 103        if (!jr->irq)
 104                jr_disable_irq(sec_idx);
 105}
 106
 107static int jr_init(uint8_t sec_idx)
 108{
 109        struct jobring *jr = &jr0[sec_idx];
 110
 111        memset(jr, 0, sizeof(struct jobring));
 112
 113        jr->jq_id = DEFAULT_JR_ID;
 114        jr->irq = DEFAULT_IRQ;
 115
 116#ifdef CONFIG_FSL_CORENET
 117        jr->liodn = DEFAULT_JR_LIODN;
 118#endif
 119        jr->size = JR_SIZE;
 120        jr->input_ring = (dma_addr_t *)memalign(ARCH_DMA_MINALIGN,
 121                                JR_SIZE * sizeof(dma_addr_t));
 122        if (!jr->input_ring)
 123                return -1;
 124
 125        jr->op_size = roundup(JR_SIZE * sizeof(struct op_ring),
 126                              ARCH_DMA_MINALIGN);
 127        jr->output_ring =
 128            (struct op_ring *)memalign(ARCH_DMA_MINALIGN, jr->op_size);
 129        if (!jr->output_ring)
 130                return -1;
 131
 132        memset(jr->input_ring, 0, JR_SIZE * sizeof(dma_addr_t));
 133        memset(jr->output_ring, 0, jr->op_size);
 134
 135        start_jr0(sec_idx);
 136
 137        jr_initregs(sec_idx);
 138
 139        return 0;
 140}
 141
 142static int jr_sw_cleanup(uint8_t sec_idx)
 143{
 144        struct jobring *jr = &jr0[sec_idx];
 145
 146        jr->head = 0;
 147        jr->tail = 0;
 148        jr->read_idx = 0;
 149        jr->write_idx = 0;
 150        memset(jr->info, 0, sizeof(jr->info));
 151        memset(jr->input_ring, 0, jr->size * sizeof(dma_addr_t));
 152        memset(jr->output_ring, 0, jr->size * sizeof(struct op_ring));
 153
 154        return 0;
 155}
 156
 157static int jr_hw_reset(uint8_t sec_idx)
 158{
 159        struct jr_regs *regs = (struct jr_regs *)SEC_JR0_ADDR(sec_idx);
 160        uint32_t timeout = 100000;
 161        uint32_t jrint, jrcr;
 162
 163        sec_out32(&regs->jrcr, JRCR_RESET);
 164        do {
 165                jrint = sec_in32(&regs->jrint);
 166        } while (((jrint & JRINT_ERR_HALT_MASK) ==
 167                  JRINT_ERR_HALT_INPROGRESS) && --timeout);
 168
 169        jrint = sec_in32(&regs->jrint);
 170        if (((jrint & JRINT_ERR_HALT_MASK) !=
 171             JRINT_ERR_HALT_INPROGRESS) && timeout == 0)
 172                return -1;
 173
 174        timeout = 100000;
 175        sec_out32(&regs->jrcr, JRCR_RESET);
 176        do {
 177                jrcr = sec_in32(&regs->jrcr);
 178        } while ((jrcr & JRCR_RESET) && --timeout);
 179
 180        if (timeout == 0)
 181                return -1;
 182
 183        return 0;
 184}
 185
 186/* -1 --- error, can't enqueue -- no space available */
 187static int jr_enqueue(uint32_t *desc_addr,
 188               void (*callback)(uint32_t status, void *arg),
 189               void *arg, uint8_t sec_idx)
 190{
 191        struct jr_regs *regs = (struct jr_regs *)SEC_JR0_ADDR(sec_idx);
 192        struct jobring *jr = &jr0[sec_idx];
 193        int head = jr->head;
 194        uint32_t desc_word;
 195        int length = desc_len(desc_addr);
 196        int i;
 197#ifdef CONFIG_PHYS_64BIT
 198        uint32_t *addr_hi, *addr_lo;
 199#endif
 200
 201        /* The descriptor must be submitted to SEC block as per endianness
 202         * of the SEC Block.
 203         * So, if the endianness of Core and SEC block is different, each word
 204         * of the descriptor will be byte-swapped.
 205         */
 206        for (i = 0; i < length; i++) {
 207                desc_word = desc_addr[i];
 208                sec_out32((uint32_t *)&desc_addr[i], desc_word);
 209        }
 210
 211        phys_addr_t desc_phys_addr = virt_to_phys(desc_addr);
 212
 213        jr->info[head].desc_phys_addr = desc_phys_addr;
 214        jr->info[head].callback = (void *)callback;
 215        jr->info[head].arg = arg;
 216        jr->info[head].op_done = 0;
 217
 218        unsigned long start = (unsigned long)&jr->info[head] &
 219                                        ~(ARCH_DMA_MINALIGN - 1);
 220        unsigned long end = ALIGN((unsigned long)&jr->info[head] +
 221                                  sizeof(struct jr_info), ARCH_DMA_MINALIGN);
 222        flush_dcache_range(start, end);
 223
 224#ifdef CONFIG_PHYS_64BIT
 225        /* Write the 64 bit Descriptor address on Input Ring.
 226         * The 32 bit hign and low part of the address will
 227         * depend on endianness of SEC block.
 228         */
 229#ifdef CONFIG_SYS_FSL_SEC_LE
 230        addr_lo = (uint32_t *)(&jr->input_ring[head]);
 231        addr_hi = (uint32_t *)(&jr->input_ring[head]) + 1;
 232#elif defined(CONFIG_SYS_FSL_SEC_BE)
 233        addr_hi = (uint32_t *)(&jr->input_ring[head]);
 234        addr_lo = (uint32_t *)(&jr->input_ring[head]) + 1;
 235#endif /* ifdef CONFIG_SYS_FSL_SEC_LE */
 236
 237        sec_out32(addr_hi, (uint32_t)(desc_phys_addr >> 32));
 238        sec_out32(addr_lo, (uint32_t)(desc_phys_addr));
 239
 240#else
 241        /* Write the 32 bit Descriptor address on Input Ring. */
 242        sec_out32(&jr->input_ring[head], desc_phys_addr);
 243#endif /* ifdef CONFIG_PHYS_64BIT */
 244
 245        start = (unsigned long)&jr->input_ring[head] & ~(ARCH_DMA_MINALIGN - 1);
 246        end = ALIGN((unsigned long)&jr->input_ring[head] +
 247                     sizeof(dma_addr_t), ARCH_DMA_MINALIGN);
 248        flush_dcache_range(start, end);
 249
 250        jr->head = (head + 1) & (jr->size - 1);
 251
 252        /* Invalidate output ring */
 253        start = (unsigned long)jr->output_ring &
 254                                        ~(ARCH_DMA_MINALIGN - 1);
 255        end = ALIGN((unsigned long)jr->output_ring + jr->op_size,
 256                    ARCH_DMA_MINALIGN);
 257        invalidate_dcache_range(start, end);
 258
 259        sec_out32(&regs->irja, 1);
 260
 261        return 0;
 262}
 263
 264static int jr_dequeue(int sec_idx)
 265{
 266        struct jr_regs *regs = (struct jr_regs *)SEC_JR0_ADDR(sec_idx);
 267        struct jobring *jr = &jr0[sec_idx];
 268        int head = jr->head;
 269        int tail = jr->tail;
 270        int idx, i, found;
 271        void (*callback)(uint32_t status, void *arg);
 272        void *arg = NULL;
 273#ifdef CONFIG_PHYS_64BIT
 274        uint32_t *addr_hi, *addr_lo;
 275#else
 276        uint32_t *addr;
 277#endif
 278
 279        while (sec_in32(&regs->orsf) && CIRC_CNT(jr->head, jr->tail,
 280                                                 jr->size)) {
 281
 282                found = 0;
 283
 284                phys_addr_t op_desc;
 285        #ifdef CONFIG_PHYS_64BIT
 286                /* Read the 64 bit Descriptor address from Output Ring.
 287                 * The 32 bit hign and low part of the address will
 288                 * depend on endianness of SEC block.
 289                 */
 290        #ifdef CONFIG_SYS_FSL_SEC_LE
 291                addr_lo = (uint32_t *)(&jr->output_ring[jr->tail].desc);
 292                addr_hi = (uint32_t *)(&jr->output_ring[jr->tail].desc) + 1;
 293        #elif defined(CONFIG_SYS_FSL_SEC_BE)
 294                addr_hi = (uint32_t *)(&jr->output_ring[jr->tail].desc);
 295                addr_lo = (uint32_t *)(&jr->output_ring[jr->tail].desc) + 1;
 296        #endif /* ifdef CONFIG_SYS_FSL_SEC_LE */
 297
 298                op_desc = ((u64)sec_in32(addr_hi) << 32) |
 299                          ((u64)sec_in32(addr_lo));
 300
 301        #else
 302                /* Read the 32 bit Descriptor address from Output Ring. */
 303                addr = (uint32_t *)&jr->output_ring[jr->tail].desc;
 304                op_desc = sec_in32(addr);
 305        #endif /* ifdef CONFIG_PHYS_64BIT */
 306
 307                uint32_t status = sec_in32(&jr->output_ring[jr->tail].status);
 308
 309                for (i = 0; CIRC_CNT(head, tail + i, jr->size) >= 1; i++) {
 310                        idx = (tail + i) & (jr->size - 1);
 311                        if (op_desc == jr->info[idx].desc_phys_addr) {
 312                                found = 1;
 313                                break;
 314                        }
 315                }
 316
 317                /* Error condition if match not found */
 318                if (!found)
 319                        return -1;
 320
 321                jr->info[idx].op_done = 1;
 322                callback = (void *)jr->info[idx].callback;
 323                arg = jr->info[idx].arg;
 324
 325                /* When the job on tail idx gets done, increment
 326                 * tail till the point where job completed out of oredr has
 327                 * been taken into account
 328                 */
 329                if (idx == tail)
 330                        do {
 331                                tail = (tail + 1) & (jr->size - 1);
 332                        } while (jr->info[tail].op_done);
 333
 334                jr->tail = tail;
 335                jr->read_idx = (jr->read_idx + 1) & (jr->size - 1);
 336
 337                sec_out32(&regs->orjr, 1);
 338                jr->info[idx].op_done = 0;
 339
 340                callback(status, arg);
 341        }
 342
 343        return 0;
 344}
 345
 346static void desc_done(uint32_t status, void *arg)
 347{
 348        struct result *x = arg;
 349        x->status = status;
 350#ifndef CONFIG_SPL_BUILD
 351        caam_jr_strstatus(status);
 352#endif
 353        x->done = 1;
 354}
 355
 356static inline int run_descriptor_jr_idx(uint32_t *desc, uint8_t sec_idx)
 357{
 358        unsigned long long timeval = get_ticks();
 359        unsigned long long timeout = usec2ticks(CONFIG_SEC_DEQ_TIMEOUT);
 360        struct result op;
 361        int ret = 0;
 362
 363        memset(&op, 0, sizeof(op));
 364
 365        ret = jr_enqueue(desc, desc_done, &op, sec_idx);
 366        if (ret) {
 367                debug("Error in SEC enq\n");
 368                ret = JQ_ENQ_ERR;
 369                goto out;
 370        }
 371
 372        timeval = get_ticks();
 373        timeout = usec2ticks(CONFIG_SEC_DEQ_TIMEOUT);
 374        while (op.done != 1) {
 375                ret = jr_dequeue(sec_idx);
 376                if (ret) {
 377                        debug("Error in SEC deq\n");
 378                        ret = JQ_DEQ_ERR;
 379                        goto out;
 380                }
 381
 382                if ((get_ticks() - timeval) > timeout) {
 383                        debug("SEC Dequeue timed out\n");
 384                        ret = JQ_DEQ_TO_ERR;
 385                        goto out;
 386                }
 387        }
 388
 389        if (op.status) {
 390                debug("Error %x\n", op.status);
 391                ret = op.status;
 392        }
 393out:
 394        return ret;
 395}
 396
 397int run_descriptor_jr(uint32_t *desc)
 398{
 399        return run_descriptor_jr_idx(desc, 0);
 400}
 401
 402static inline int jr_reset_sec(uint8_t sec_idx)
 403{
 404        if (jr_hw_reset(sec_idx) < 0)
 405                return -1;
 406
 407        /* Clean up the jobring structure maintained by software */
 408        jr_sw_cleanup(sec_idx);
 409
 410        return 0;
 411}
 412
 413int jr_reset(void)
 414{
 415        return jr_reset_sec(0);
 416}
 417
 418static inline int sec_reset_idx(uint8_t sec_idx)
 419{
 420        ccsr_sec_t *sec = (void *)SEC_ADDR(sec_idx);
 421        uint32_t mcfgr = sec_in32(&sec->mcfgr);
 422        uint32_t timeout = 100000;
 423
 424        mcfgr |= MCFGR_SWRST;
 425        sec_out32(&sec->mcfgr, mcfgr);
 426
 427        mcfgr |= MCFGR_DMA_RST;
 428        sec_out32(&sec->mcfgr, mcfgr);
 429        do {
 430                mcfgr = sec_in32(&sec->mcfgr);
 431        } while ((mcfgr & MCFGR_DMA_RST) == MCFGR_DMA_RST && --timeout);
 432
 433        if (timeout == 0)
 434                return -1;
 435
 436        timeout = 100000;
 437        do {
 438                mcfgr = sec_in32(&sec->mcfgr);
 439        } while ((mcfgr & MCFGR_SWRST) == MCFGR_SWRST && --timeout);
 440
 441        if (timeout == 0)
 442                return -1;
 443
 444        return 0;
 445}
 446int sec_reset(void)
 447{
 448        return sec_reset_idx(0);
 449}
 450#ifndef CONFIG_SPL_BUILD
 451static int deinstantiate_rng(u8 sec_idx, int state_handle_mask)
 452{
 453        u32 *desc;
 454        int sh_idx, ret = 0;
 455        int desc_size = ALIGN(sizeof(u32) * 2, ARCH_DMA_MINALIGN);
 456
 457        desc = memalign(ARCH_DMA_MINALIGN, desc_size);
 458        if (!desc) {
 459                debug("cannot allocate RNG init descriptor memory\n");
 460                return -ENOMEM;
 461        }
 462
 463        for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
 464                /*
 465                 * If the corresponding bit is set, then it means the state
 466                 * handle was initialized by us, and thus it needs to be
 467                 * deinitialized as well
 468                 */
 469
 470                if (state_handle_mask & RDSTA_IF(sh_idx)) {
 471                        /*
 472                         * Create the descriptor for deinstantating this state
 473                         * handle.
 474                         */
 475                        inline_cnstr_jobdesc_rng_deinstantiation(desc, sh_idx);
 476                        flush_dcache_range((unsigned long)desc,
 477                                           (unsigned long)desc + desc_size);
 478
 479                        ret = run_descriptor_jr_idx(desc, sec_idx);
 480                        if (ret) {
 481                                printf("SEC%u:  RNG4 SH%d deinstantiation failed with error 0x%x\n",
 482                                       sec_idx, sh_idx, ret);
 483                                ret = -EIO;
 484                                break;
 485                        }
 486
 487                        printf("SEC%u:  Deinstantiated RNG4 SH%d\n",
 488                               sec_idx, sh_idx);
 489                }
 490        }
 491
 492        free(desc);
 493        return ret;
 494}
 495
 496static int instantiate_rng(u8 sec_idx, int gen_sk)
 497{
 498        u32 *desc;
 499        u32 rdsta_val;
 500        int ret = 0, sh_idx, size;
 501        ccsr_sec_t __iomem *sec = (ccsr_sec_t __iomem *)SEC_ADDR(sec_idx);
 502        struct rng4tst __iomem *rng =
 503                        (struct rng4tst __iomem *)&sec->rng;
 504
 505        desc = memalign(ARCH_DMA_MINALIGN, sizeof(uint32_t) * 6);
 506        if (!desc) {
 507                printf("cannot allocate RNG init descriptor memory\n");
 508                return -1;
 509        }
 510
 511        for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
 512                /*
 513                 * If the corresponding bit is set, this state handle
 514                 * was initialized by somebody else, so it's left alone.
 515                 */
 516                rdsta_val = sec_in32(&rng->rdsta);
 517                if (rdsta_val & (RDSTA_IF(sh_idx))) {
 518                        if (rdsta_val & RDSTA_PR(sh_idx))
 519                                continue;
 520
 521                        printf("SEC%u:  RNG4 SH%d was instantiated w/o prediction resistance. Tearing it down\n",
 522                               sec_idx, sh_idx);
 523
 524                        ret = deinstantiate_rng(sec_idx, RDSTA_IF(sh_idx));
 525                        if (ret)
 526                                break;
 527                }
 528
 529                inline_cnstr_jobdesc_rng_instantiation(desc, sh_idx, gen_sk);
 530                size = roundup(sizeof(uint32_t) * 6, ARCH_DMA_MINALIGN);
 531                flush_dcache_range((unsigned long)desc,
 532                                   (unsigned long)desc + size);
 533
 534                ret = run_descriptor_jr_idx(desc, sec_idx);
 535
 536                if (ret)
 537                        printf("SEC%u:  RNG4 SH%d instantiation failed with error 0x%x\n",
 538                               sec_idx, sh_idx, ret);
 539
 540                rdsta_val = sec_in32(&rng->rdsta);
 541                if (!(rdsta_val & RDSTA_IF(sh_idx))) {
 542                        free(desc);
 543                        return -1;
 544                }
 545
 546                memset(desc, 0, sizeof(uint32_t) * 6);
 547        }
 548
 549        free(desc);
 550
 551        return ret;
 552}
 553
 554static u8 get_rng_vid(uint8_t sec_idx)
 555{
 556        ccsr_sec_t *sec = (void *)SEC_ADDR(sec_idx);
 557        u8 vid;
 558
 559        if (caam_get_era() < 10) {
 560                vid = (sec_in32(&sec->chavid_ls) & SEC_CHAVID_RNG_LS_MASK)
 561                       >> SEC_CHAVID_LS_RNG_SHIFT;
 562        } else {
 563                vid = (sec_in32(&sec->vreg.rng) & CHA_VER_VID_MASK)
 564                       >> CHA_VER_VID_SHIFT;
 565        }
 566
 567        return vid;
 568}
 569
 570/*
 571 * By default, the TRNG runs for 200 clocks per sample;
 572 * 1200 clocks per sample generates better entropy.
 573 */
 574static void kick_trng(int ent_delay, uint8_t sec_idx)
 575{
 576        ccsr_sec_t __iomem *sec = (ccsr_sec_t __iomem *)SEC_ADDR(sec_idx);
 577        struct rng4tst __iomem *rng =
 578                        (struct rng4tst __iomem *)&sec->rng;
 579        u32 val;
 580
 581        /* put RNG4 into program mode */
 582        sec_setbits32(&rng->rtmctl, RTMCTL_PRGM);
 583        /* rtsdctl bits 0-15 contain "Entropy Delay, which defines the
 584         * length (in system clocks) of each Entropy sample taken
 585         * */
 586        val = sec_in32(&rng->rtsdctl);
 587        val = (val & ~RTSDCTL_ENT_DLY_MASK) |
 588              (ent_delay << RTSDCTL_ENT_DLY_SHIFT);
 589        sec_out32(&rng->rtsdctl, val);
 590        /* min. freq. count, equal to 1/4 of the entropy sample length */
 591        sec_out32(&rng->rtfreqmin, ent_delay >> 2);
 592        /* disable maximum frequency count */
 593        sec_out32(&rng->rtfreqmax, RTFRQMAX_DISABLE);
 594        /*
 595         * select raw sampling in both entropy shifter
 596         * and statistical checker
 597         */
 598        sec_setbits32(&rng->rtmctl, RTMCTL_SAMP_MODE_RAW_ES_SC);
 599        /* put RNG4 into run mode */
 600        sec_clrbits32(&rng->rtmctl, RTMCTL_PRGM);
 601}
 602
 603static int rng_init(uint8_t sec_idx)
 604{
 605        int ret, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
 606        ccsr_sec_t __iomem *sec = (ccsr_sec_t __iomem *)SEC_ADDR(sec_idx);
 607        struct rng4tst __iomem *rng =
 608                        (struct rng4tst __iomem *)&sec->rng;
 609        u32 inst_handles;
 610
 611        gen_sk = !(sec_in32(&rng->rdsta) & RDSTA_SKVN);
 612        do {
 613                inst_handles = sec_in32(&rng->rdsta) & RDSTA_MASK;
 614
 615                /*
 616                 * If either of the SH's were instantiated by somebody else
 617                 * then it is assumed that the entropy
 618                 * parameters are properly set and thus the function
 619                 * setting these (kick_trng(...)) is skipped.
 620                 * Also, if a handle was instantiated, do not change
 621                 * the TRNG parameters.
 622                 */
 623                if (!inst_handles) {
 624                        kick_trng(ent_delay, sec_idx);
 625                        ent_delay += 400;
 626                }
 627                /*
 628                 * if instantiate_rng(...) fails, the loop will rerun
 629                 * and the kick_trng(...) function will modfiy the
 630                 * upper and lower limits of the entropy sampling
 631                 * interval, leading to a sucessful initialization of
 632                 * the RNG.
 633                 */
 634                ret = instantiate_rng(sec_idx, gen_sk);
 635        } while ((ret == -1) && (ent_delay < RTSDCTL_ENT_DLY_MAX));
 636        if (ret) {
 637                printf("SEC%u:  Failed to instantiate RNG\n", sec_idx);
 638                return ret;
 639        }
 640
 641         /* Enable RDB bit so that RNG works faster */
 642        sec_setbits32(&sec->scfgr, SEC_SCFGR_RDBENABLE);
 643
 644        return ret;
 645}
 646#endif
 647int sec_init_idx(uint8_t sec_idx)
 648{
 649        ccsr_sec_t *sec = (void *)SEC_ADDR(sec_idx);
 650        uint32_t mcr = sec_in32(&sec->mcfgr);
 651        int ret = 0;
 652
 653#ifdef CONFIG_FSL_CORENET
 654        uint32_t liodnr;
 655        uint32_t liodn_ns;
 656        uint32_t liodn_s;
 657#endif
 658
 659        if (!(sec_idx < CONFIG_SYS_FSL_MAX_NUM_OF_SEC)) {
 660                printf("SEC%u:  initialization failed\n", sec_idx);
 661                return -1;
 662        }
 663
 664        /*
 665         * Modifying CAAM Read/Write Attributes
 666         * For LS2080A
 667         * For AXI Write - Cacheable, Write Back, Write allocate
 668         * For AXI Read - Cacheable, Read allocate
 669         * Only For LS2080a, to solve CAAM coherency issues
 670         */
 671#ifdef CONFIG_ARCH_LS2080A
 672        mcr = (mcr & ~MCFGR_AWCACHE_MASK) | (0xb << MCFGR_AWCACHE_SHIFT);
 673        mcr = (mcr & ~MCFGR_ARCACHE_MASK) | (0x6 << MCFGR_ARCACHE_SHIFT);
 674#else
 675        mcr = (mcr & ~MCFGR_AWCACHE_MASK) | (0x2 << MCFGR_AWCACHE_SHIFT);
 676#endif
 677
 678#ifdef CONFIG_PHYS_64BIT
 679        mcr |= (1 << MCFGR_PS_SHIFT);
 680#endif
 681        sec_out32(&sec->mcfgr, mcr);
 682
 683#ifdef CONFIG_FSL_CORENET
 684#ifdef CONFIG_SPL_BUILD
 685        /*
 686         * For SPL Build, Set the Liodns in SEC JR0 for
 687         * creating PAMU entries corresponding to these.
 688         * For normal build, these are set in set_liodns().
 689         */
 690        liodn_ns = CONFIG_SPL_JR0_LIODN_NS & JRNSLIODN_MASK;
 691        liodn_s = CONFIG_SPL_JR0_LIODN_S & JRSLIODN_MASK;
 692
 693        liodnr = sec_in32(&sec->jrliodnr[0].ls) &
 694                 ~(JRNSLIODN_MASK | JRSLIODN_MASK);
 695        liodnr = liodnr |
 696                 (liodn_ns << JRNSLIODN_SHIFT) |
 697                 (liodn_s << JRSLIODN_SHIFT);
 698        sec_out32(&sec->jrliodnr[0].ls, liodnr);
 699#else
 700        liodnr = sec_in32(&sec->jrliodnr[0].ls);
 701        liodn_ns = (liodnr & JRNSLIODN_MASK) >> JRNSLIODN_SHIFT;
 702        liodn_s = (liodnr & JRSLIODN_MASK) >> JRSLIODN_SHIFT;
 703#endif
 704#endif
 705
 706        ret = jr_init(sec_idx);
 707        if (ret < 0) {
 708                printf("SEC%u:  initialization failed\n", sec_idx);
 709                return -1;
 710        }
 711
 712#ifdef CONFIG_FSL_CORENET
 713        ret = sec_config_pamu_table(liodn_ns, liodn_s);
 714        if (ret < 0)
 715                return -1;
 716
 717        pamu_enable();
 718#endif
 719#ifndef CONFIG_SPL_BUILD
 720        if (get_rng_vid(sec_idx) >= 4) {
 721                if (rng_init(sec_idx) < 0) {
 722                        printf("SEC%u:  RNG instantiation failed\n", sec_idx);
 723                        return -1;
 724                }
 725
 726                if (IS_ENABLED(CONFIG_DM_RNG)) {
 727                        ret = device_bind_driver(NULL, "caam-rng", "caam-rng",
 728                                                 NULL);
 729                        if (ret)
 730                                printf("Couldn't bind rng driver (%d)\n", ret);
 731                }
 732
 733                printf("SEC%u:  RNG instantiated\n", sec_idx);
 734        }
 735#endif
 736        return ret;
 737}
 738
 739int sec_init(void)
 740{
 741        return sec_init_idx(0);
 742}
 743