drivers/crypto/inside-secure/safexcel.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2017 Marvell
   4  *
   5  * Antoine Tenart <antoine.tenart@free-electrons.com>
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/device.h>
  10 #include <linux/dma-mapping.h>
  11 #include <linux/dmapool.h>
  12 #include <linux/firmware.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/module.h>
  15 #include <linux/of_platform.h>
  16 #include <linux/of_irq.h>
  17 #include <linux/pci.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/workqueue.h>
  20
  21 #include <crypto/internal/aead.h>
  22 #include <crypto/internal/hash.h>
  23 #include <crypto/internal/skcipher.h>
  24
  25 #include "safexcel.h"
  26
  27 static u32 max_rings = EIP197_MAX_RINGS;
  28 module_param(max_rings, uint, 0644);
  29 MODULE_PARM_DESC(max_rings, "Maximum number of rings to use.");
  30
  31 static void eip197_trc_cache_setupvirt(struct safexcel_crypto_priv *priv)
  32 {
  33         int i;
  34
  35         /*
  36          * Map all interfaces/rings to register index 0
  37          * so they can share contexts. Without this, the EIP197 will
  38          * assume each interface/ring to be in its own memory domain
  39          * i.e. have its own subset of UNIQUE memory addresses.
  40          * Which would cause records with the SAME memory address to
  41          * use DIFFERENT cache buffers, causing both poor cache utilization
  42          * AND serious coherence/invalidation issues.
  43          */
  44         for (i = 0; i < 4; i++)
  45                 writel(0, priv->base + EIP197_FLUE_IFC_LUT(i));
  46
  47         /*
  48          * Initialize other virtualization regs for cache
  49          * These may not be in their reset state ...
  50          */
  51         for (i = 0; i < priv->config.rings; i++) {
  52                 writel(0, priv->base + EIP197_FLUE_CACHEBASE_LO(i));
  53                 writel(0, priv->base + EIP197_FLUE_CACHEBASE_HI(i));
  54                 writel(EIP197_FLUE_CONFIG_MAGIC,
  55                        priv->base + EIP197_FLUE_CONFIG(i));
  56         }
  57         writel(0, priv->base + EIP197_FLUE_OFFSETS);
  58         writel(0, priv->base + EIP197_FLUE_ARC4_OFFSET);
  59 }
  60
  61 static void eip197_trc_cache_banksel(struct safexcel_crypto_priv *priv,
  62                                      u32 addrmid, int *actbank)
  63 {
  64         u32 val;
  65         int curbank;
  66
  67         curbank = addrmid >> 16;
  68         if (curbank != *actbank) {
  69                 val = readl(priv->base + EIP197_CS_RAM_CTRL);
  70                 val = (val & ~EIP197_CS_BANKSEL_MASK) |
  71                       (curbank << EIP197_CS_BANKSEL_OFS);
  72                 writel(val, priv->base + EIP197_CS_RAM_CTRL);
  73                 *actbank = curbank;
  74         }
  75 }
  76
  77 static u32 eip197_trc_cache_probe(struct safexcel_crypto_priv *priv,
  78                                   int maxbanks, u32 probemask, u32 stride)
  79 {
  80         u32 val, addrhi, addrlo, addrmid, addralias, delta, marker;
  81         int actbank;
  82
  83         /*
  84          * And probe the actual size of the physically attached cache data RAM
  85          * Using a binary subdivision algorithm downto 32 byte cache lines.
  86          */
  87         addrhi = 1 << (16 + maxbanks);
  88         addrlo = 0;
  89         actbank = min(maxbanks - 1, 0);
  90         while ((addrhi - addrlo) > stride) {
  91                 /* write marker to lowest address in top half */
  92                 addrmid = (addrhi + addrlo) >> 1;
  93                 marker = (addrmid ^ 0xabadbabe) & probemask; /* Unique */
  94                 eip197_trc_cache_banksel(priv, addrmid, &actbank);
  95                 writel(marker,
  96                         priv->base + EIP197_CLASSIFICATION_RAMS +
  97                         (addrmid & 0xffff));
  98
  99                 /* write invalid markers to possible aliases */
 100                 delta = 1 << __fls(addrmid);
 101                 while (delta >= stride) {
 102                         addralias = addrmid - delta;
 103                         eip197_trc_cache_banksel(priv, addralias, &actbank);
 104                         writel(~marker,
 105                                priv->base + EIP197_CLASSIFICATION_RAMS +
 106                                (addralias & 0xffff));
 107                         delta >>= 1;
 108                 }
 109
 110                 /* read back marker from top half */
 111                 eip197_trc_cache_banksel(priv, addrmid, &actbank);
 112                 val = readl(priv->base + EIP197_CLASSIFICATION_RAMS +
 113                             (addrmid & 0xffff));
 114
 115                 if ((val & probemask) == marker)
 116                         /* read back correct, continue with top half */
 117                         addrlo = addrmid;
 118                 else
 119                         /* not read back correct, continue with bottom half */
 120                         addrhi = addrmid;
 121         }
 122         return addrhi;
 123 }
 124
 125 static void eip197_trc_cache_clear(struct safexcel_crypto_priv *priv,
 126                                    int cs_rc_max, int cs_ht_wc)
 127 {
 128         int i;
 129         u32 htable_offset, val, offset;
 130
 131         /* Clear all records in administration RAM */
 132         for (i = 0; i < cs_rc_max; i++) {
 133                 offset = EIP197_CLASSIFICATION_RAMS + i * EIP197_CS_RC_SIZE;
 134
 135                 writel(EIP197_CS_RC_NEXT(EIP197_RC_NULL) |
 136                        EIP197_CS_RC_PREV(EIP197_RC_NULL),
 137                        priv->base + offset);
 138
 139                 val = EIP197_CS_RC_NEXT(i + 1) | EIP197_CS_RC_PREV(i - 1);
 140                 if (i == 0)
 141                         val |= EIP197_CS_RC_PREV(EIP197_RC_NULL);
 142                 else if (i == cs_rc_max - 1)
 143                         val |= EIP197_CS_RC_NEXT(EIP197_RC_NULL);
 144                 writel(val, priv->base + offset + 4);
 145                 /* must also initialize the address key due to ECC! */
 146                 writel(0, priv->base + offset + 8);
 147                 writel(0, priv->base + offset + 12);
 148         }
 149
 150         /* Clear the hash table entries */
 151         htable_offset = cs_rc_max * EIP197_CS_RC_SIZE;
 152         for (i = 0; i < cs_ht_wc; i++)
 153                 writel(GENMASK(29, 0),
 154                        priv->base + EIP197_CLASSIFICATION_RAMS +
 155                        htable_offset + i * sizeof(u32));
 156 }
 157
 158 static int eip197_trc_cache_init(struct safexcel_crypto_priv *priv)
 159 {
 160         u32 val, dsize, asize;
 161         int cs_rc_max, cs_ht_wc, cs_trc_rec_wc, cs_trc_lg_rec_wc;
 162         int cs_rc_abs_max, cs_ht_sz;
 163         int maxbanks;
 164
 165         /* Setup (dummy) virtualization for cache */
 166         eip197_trc_cache_setupvirt(priv);
 167
 168         /*
 169          * Enable the record cache memory access and
 170          * probe the bank select width
 171          */
 172         val = readl(priv->base + EIP197_CS_RAM_CTRL);
 173         val &= ~EIP197_TRC_ENABLE_MASK;
 174         val |= EIP197_TRC_ENABLE_0 | EIP197_CS_BANKSEL_MASK;
 175         writel(val, priv->base + EIP197_CS_RAM_CTRL);
 176         val = readl(priv->base + EIP197_CS_RAM_CTRL);
 177         maxbanks = ((val&EIP197_CS_BANKSEL_MASK)>>EIP197_CS_BANKSEL_OFS) + 1;
 178
 179         /* Clear all ECC errors */
 180         writel(0, priv->base + EIP197_TRC_ECCCTRL);
 181
 182         /*
 183          * Make sure the cache memory is accessible by taking record cache into
 184          * reset. Need data memory access here, not admin access.
 185          */
 186         val = readl(priv->base + EIP197_TRC_PARAMS);
 187         val |= EIP197_TRC_PARAMS_SW_RESET | EIP197_TRC_PARAMS_DATA_ACCESS;
 188         writel(val, priv->base + EIP197_TRC_PARAMS);
 189
 190         /* Probed data RAM size in bytes */
 191         dsize = eip197_trc_cache_probe(priv, maxbanks, 0xffffffff, 32);
 192
 193         /*
 194          * Now probe the administration RAM size pretty much the same way
 195          * Except that only the lower 30 bits are writable and we don't need
 196          * bank selects
 197          */
 198         val = readl(priv->base + EIP197_TRC_PARAMS);
 199         /* admin access now */
 200         val &= ~(EIP197_TRC_PARAMS_DATA_ACCESS | EIP197_CS_BANKSEL_MASK);
 201         writel(val, priv->base + EIP197_TRC_PARAMS);
 202
 203         /* Probed admin RAM size in admin words */
 204         asize = eip197_trc_cache_probe(priv, 0, 0x3fffffff, 16) >> 4;
 205
 206         /* Clear any ECC errors detected while probing! */
 207         writel(0, priv->base + EIP197_TRC_ECCCTRL);
 208
 209         /* Sanity check probing results */
 210         if (dsize < EIP197_MIN_DSIZE || asize < EIP197_MIN_ASIZE) {
 211                 dev_err(priv->dev, "Record cache probing failed (%d,%d).",
 212                         dsize, asize);
 213                 return -ENODEV;
 214         }
 215
 216         /*
 217          * Determine optimal configuration from RAM sizes
 218          * Note that we assume that the physical RAM configuration is sane
 219          * Therefore, we don't do any parameter error checking here ...
 220          */
 221
 222         /* For now, just use a single record format covering everything */
 223         cs_trc_rec_wc = EIP197_CS_TRC_REC_WC;
 224         cs_trc_lg_rec_wc = EIP197_CS_TRC_REC_WC;
 225
 226         /*
 227          * Step #1: How many records will physically fit?
 228          * Hard upper limit is 1023!
 229          */
 230         cs_rc_abs_max = min_t(uint, ((dsize >> 2) / cs_trc_lg_rec_wc), 1023);
 231         /* Step #2: Need at least 2 words in the admin RAM per record */
 232         cs_rc_max = min_t(uint, cs_rc_abs_max, (asize >> 1));
 233         /* Step #3: Determine log2 of hash table size */
 234         cs_ht_sz = __fls(asize - cs_rc_max) - 2;
 235         /* Step #4: determine current size of hash table in dwords */
 236         cs_ht_wc = 16 << cs_ht_sz; /* dwords, not admin words */
 237         /* Step #5: add back excess words and see if we can fit more records */
 238         cs_rc_max = min_t(uint, cs_rc_abs_max, asize - (cs_ht_wc >> 2));
 239
 240         /* Clear the cache RAMs */
 241         eip197_trc_cache_clear(priv, cs_rc_max, cs_ht_wc);
 242
 243         /* Disable the record cache memory access */
 244         val = readl(priv->base + EIP197_CS_RAM_CTRL);
 245         val &= ~EIP197_TRC_ENABLE_MASK;
 246         writel(val, priv->base + EIP197_CS_RAM_CTRL);
 247
 248         /* Write head and tail pointers of the record free chain */
 249         val = EIP197_TRC_FREECHAIN_HEAD_PTR(0) |
 250               EIP197_TRC_FREECHAIN_TAIL_PTR(cs_rc_max - 1);
 251         writel(val, priv->base + EIP197_TRC_FREECHAIN);
 252
 253         /* Configure the record cache #1 */
 254         val = EIP197_TRC_PARAMS2_RC_SZ_SMALL(cs_trc_rec_wc) |
 255               EIP197_TRC_PARAMS2_HTABLE_PTR(cs_rc_max);
 256         writel(val, priv->base + EIP197_TRC_PARAMS2);
 257
 258         /* Configure the record cache #2 */
 259         val = EIP197_TRC_PARAMS_RC_SZ_LARGE(cs_trc_lg_rec_wc) |
 260               EIP197_TRC_PARAMS_BLK_TIMER_SPEED(1) |
 261               EIP197_TRC_PARAMS_HTABLE_SZ(cs_ht_sz);
 262         writel(val, priv->base + EIP197_TRC_PARAMS);
 263
 264         dev_info(priv->dev, "TRC init: %dd,%da (%dr,%dh)\n",
 265                  dsize, asize, cs_rc_max, cs_ht_wc + cs_ht_wc);
 266         return 0;
 267 }
 268
 269 static void eip197_init_firmware(struct safexcel_crypto_priv *priv)
 270 {
 271         int pe, i;
 272         u32 val;
 273
 274         for (pe = 0; pe < priv->config.pes; pe++) {
 275                 /* Configure the token FIFO's */
 276                 writel(3, EIP197_PE(priv) + EIP197_PE_ICE_PUTF_CTRL(pe));
 277                 writel(0, EIP197_PE(priv) + EIP197_PE_ICE_PPTF_CTRL(pe));
 278
 279                 /* Clear the ICE scratchpad memory */
 280                 val = readl(EIP197_PE(priv) + EIP197_PE_ICE_SCRATCH_CTRL(pe));
 281                 val |= EIP197_PE_ICE_SCRATCH_CTRL_CHANGE_TIMER |
 282                        EIP197_PE_ICE_SCRATCH_CTRL_TIMER_EN |
 283                        EIP197_PE_ICE_SCRATCH_CTRL_SCRATCH_ACCESS |
 284                        EIP197_PE_ICE_SCRATCH_CTRL_CHANGE_ACCESS;
 285                 writel(val, EIP197_PE(priv) + EIP197_PE_ICE_SCRATCH_CTRL(pe));
 286
 287                 /* clear the scratchpad RAM using 32 bit writes only */
 288                 for (i = 0; i < EIP197_NUM_OF_SCRATCH_BLOCKS; i++)
 289                         writel(0, EIP197_PE(priv) +
 290                                   EIP197_PE_ICE_SCRATCH_RAM(pe) + (i << 2));
 291
 292                 /* Reset the IFPP engine to make its program mem accessible */
 293                 writel(EIP197_PE_ICE_x_CTRL_SW_RESET |
 294                        EIP197_PE_ICE_x_CTRL_CLR_ECC_CORR |
 295                        EIP197_PE_ICE_x_CTRL_CLR_ECC_NON_CORR,
 296                        EIP197_PE(priv) + EIP197_PE_ICE_FPP_CTRL(pe));
 297
 298                 /* Reset the IPUE engine to make its program mem accessible */
 299                 writel(EIP197_PE_ICE_x_CTRL_SW_RESET |
 300                        EIP197_PE_ICE_x_CTRL_CLR_ECC_CORR |
 301                        EIP197_PE_ICE_x_CTRL_CLR_ECC_NON_CORR,
 302                        EIP197_PE(priv) + EIP197_PE_ICE_PUE_CTRL(pe));
 303
 304                 /* Enable access to all IFPP program memories */
 305                 writel(EIP197_PE_ICE_RAM_CTRL_FPP_PROG_EN,
 306                        EIP197_PE(priv) + EIP197_PE_ICE_RAM_CTRL(pe));
 307
 308                 /* bypass the OCE, if present */
 309                 if (priv->flags & EIP197_OCE)
 310                         writel(EIP197_DEBUG_OCE_BYPASS, EIP197_PE(priv) +
 311                                                         EIP197_PE_DEBUG(pe));
 312         }
 313
 314 }
 315
 316 static int eip197_write_firmware(struct safexcel_crypto_priv *priv,
 317                                   const struct firmware *fw)
 318 {
 319         const __be32 *data = (const __be32 *)fw->data;
 320         int i;
 321
 322         /* Write the firmware */
 323         for (i = 0; i < fw->size / sizeof(u32); i++)
 324                 writel(be32_to_cpu(data[i]),
 325                        priv->base + EIP197_CLASSIFICATION_RAMS +
 326                        i * sizeof(__be32));
 327
 328         /* Exclude final 2 NOPs from size */
 329         return i - EIP197_FW_TERMINAL_NOPS;
 330 }
 331
 332 /*
 333  * If FW is actual production firmware, then poll for its initialization
 334  * to complete and check if it is good for the HW, otherwise just return OK.
 335  */
 336 static bool poll_fw_ready(struct safexcel_crypto_priv *priv, int fpp)
 337 {
 338         int pe, pollcnt;
 339         u32 base, pollofs;
 340
 341         if (fpp)
 342                 pollofs  = EIP197_FW_FPP_READY;
 343         else
 344                 pollofs  = EIP197_FW_PUE_READY;
 345
 346         for (pe = 0; pe < priv->config.pes; pe++) {
 347                 base = EIP197_PE_ICE_SCRATCH_RAM(pe);
 348                 pollcnt = EIP197_FW_START_POLLCNT;
 349                 while (pollcnt &&
 350                        (readl_relaxed(EIP197_PE(priv) + base +
 351                               pollofs) != 1)) {
 352                         pollcnt--;
 353                 }
 354                 if (!pollcnt) {
 355                         dev_err(priv->dev, "FW(%d) for PE %d failed to start\n",
 356                                 fpp, pe);
 357                         return false;
 358                 }
 359         }
 360         return true;
 361 }
 362
 363 static bool eip197_start_firmware(struct safexcel_crypto_priv *priv,
 364                                   int ipuesz, int ifppsz, int minifw)
 365 {
 366         int pe;
 367         u32 val;
 368
 369         for (pe = 0; pe < priv->config.pes; pe++) {
 370                 /* Disable access to all program memory */
 371                 writel(0, EIP197_PE(priv) + EIP197_PE_ICE_RAM_CTRL(pe));
 372
 373                 /* Start IFPP microengines */
 374                 if (minifw)
 375                         val = 0;
 376                 else
 377                         val = EIP197_PE_ICE_UENG_START_OFFSET((ifppsz - 1) &
 378                                         EIP197_PE_ICE_UENG_INIT_ALIGN_MASK) |
 379                                 EIP197_PE_ICE_UENG_DEBUG_RESET;
 380                 writel(val, EIP197_PE(priv) + EIP197_PE_ICE_FPP_CTRL(pe));
 381
 382                 /* Start IPUE microengines */
 383                 if (minifw)
 384                         val = 0;
 385                 else
 386                         val = EIP197_PE_ICE_UENG_START_OFFSET((ipuesz - 1) &
 387                                         EIP197_PE_ICE_UENG_INIT_ALIGN_MASK) |
 388                                 EIP197_PE_ICE_UENG_DEBUG_RESET;
 389                 writel(val, EIP197_PE(priv) + EIP197_PE_ICE_PUE_CTRL(pe));
 390         }
 391
 392         /* For miniFW startup, there is no initialization, so always succeed */
 393         if (minifw)
 394                 return true;
 395
 396         /* Wait until all the firmwares have properly started up */
 397         if (!poll_fw_ready(priv, 1))
 398                 return false;
 399         if (!poll_fw_ready(priv, 0))
 400                 return false;
 401
 402         return true;
 403 }
 404
 405 static int eip197_load_firmwares(struct safexcel_crypto_priv *priv)
 406 {
 407         const char *fw_name[] = {"ifpp.bin", "ipue.bin"};
 408         const struct firmware *fw[FW_NB];
 409         char fw_path[37], *dir = NULL;
 410         int i, j, ret = 0, pe;
 411         int ipuesz, ifppsz, minifw = 0;
 412
 413         if (priv->version == EIP197D_MRVL)
 414                 dir = "eip197d";
 415         else if (priv->version == EIP197B_MRVL ||
 416                  priv->version == EIP197_DEVBRD)
 417                 dir = "eip197b";
 418         else
 419                 return -ENODEV;
 420
 421 retry_fw:
 422         for (i = 0; i < FW_NB; i++) {
 423                 snprintf(fw_path, 37, "inside-secure/%s/%s", dir, fw_name[i]);
 424                 ret = firmware_request_nowarn(&fw[i], fw_path, priv->dev);
 425                 if (ret) {
 426                         if (minifw || priv->version != EIP197B_MRVL)
 427                                 goto release_fw;
 428
 429                         /* Fallback to the old firmware location for the
 430                          * EIP197b.
 431                          */
 432                         ret = firmware_request_nowarn(&fw[i], fw_name[i],
 433                                                       priv->dev);
 434                         if (ret)
 435                                 goto release_fw;
 436                 }
 437         }
 438
 439         eip197_init_firmware(priv);
 440
 441         ifppsz = eip197_write_firmware(priv, fw[FW_IFPP]);
 442
 443         /* Enable access to IPUE program memories */
 444         for (pe = 0; pe < priv->config.pes; pe++)
 445                 writel(EIP197_PE_ICE_RAM_CTRL_PUE_PROG_EN,
 446                        EIP197_PE(priv) + EIP197_PE_ICE_RAM_CTRL(pe));
 447
 448         ipuesz = eip197_write_firmware(priv, fw[FW_IPUE]);
 449
 450         if (eip197_start_firmware(priv, ipuesz, ifppsz, minifw)) {
 451                 dev_dbg(priv->dev, "Firmware loaded successfully\n");
 452                 return 0;
 453         }
 454
 455         ret = -ENODEV;
 456
 457 release_fw:
 458         for (j = 0; j < i; j++)
 459                 release_firmware(fw[j]);
 460
 461         if (!minifw) {
 462                 /* Retry with minifw path */
 463                 dev_dbg(priv->dev, "Firmware set not (fully) present or init failed, falling back to BCLA mode\n");
 464                 dir = "eip197_minifw";
 465                 minifw = 1;
 466                 goto retry_fw;
 467         }
 468
 469         dev_dbg(priv->dev, "Firmware load failed.\n");
 470
 471         return ret;
 472 }
 473
 474 static int safexcel_hw_setup_cdesc_rings(struct safexcel_crypto_priv *priv)
 475 {
 476         u32 cd_size_rnd, val;
 477         int i, cd_fetch_cnt;
 478
 479         cd_size_rnd  = (priv->config.cd_size +
 480                         (BIT(priv->hwconfig.hwdataw) - 1)) >>
 481                        priv->hwconfig.hwdataw;
 482         /* determine number of CD's we can fetch into the CD FIFO as 1 block */
 483         if (priv->flags & SAFEXCEL_HW_EIP197) {
 484                 /* EIP197: try to fetch enough in 1 go to keep all pipes busy */
 485                 cd_fetch_cnt = (1 << priv->hwconfig.hwcfsize) / cd_size_rnd;
 486                 cd_fetch_cnt = min_t(uint, cd_fetch_cnt,
 487                                      (priv->config.pes * EIP197_FETCH_DEPTH));
 488         } else {
 489                 /* for the EIP97, just fetch all that fits minus 1 */
 490                 cd_fetch_cnt = ((1 << priv->hwconfig.hwcfsize) /
 491                                 cd_size_rnd) - 1;
 492         }
 493         /*
 494          * Since we're using command desc's way larger than formally specified,
 495          * we need to check whether we can fit even 1 for low-end EIP196's!
 496          */
 497         if (!cd_fetch_cnt) {
 498                 dev_err(priv->dev, "Unable to fit even 1 command desc!\n");
 499                 return -ENODEV;
 500         }
 501
 502         for (i = 0; i < priv->config.rings; i++) {
 503                 /* ring base address */
 504                 writel(lower_32_bits(priv->ring[i].cdr.base_dma),
 505                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_LO);
 506                 writel(upper_32_bits(priv->ring[i].cdr.base_dma),
 507                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_HI);
 508
 509                 writel(EIP197_xDR_DESC_MODE_64BIT | EIP197_CDR_DESC_MODE_ADCP |
 510                        (priv->config.cd_offset << 14) | priv->config.cd_size,
 511                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_DESC_SIZE);
 512                 writel(((cd_fetch_cnt *
 513                          (cd_size_rnd << priv->hwconfig.hwdataw)) << 16) |
 514                        (cd_fetch_cnt * (priv->config.cd_offset / sizeof(u32))),
 515                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_CFG);
 516
 517                 /* Configure DMA tx control */
 518                 val = EIP197_HIA_xDR_CFG_WR_CACHE(WR_CACHE_3BITS);
 519                 val |= EIP197_HIA_xDR_CFG_RD_CACHE(RD_CACHE_3BITS);
 520                 writel(val, EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_DMA_CFG);
 521
 522                 /* clear any pending interrupt */
 523                 writel(GENMASK(5, 0),
 524                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_STAT);
 525         }
 526
 527         return 0;
 528 }
 529
 530 static int safexcel_hw_setup_rdesc_rings(struct safexcel_crypto_priv *priv)
 531 {
 532         u32 rd_size_rnd, val;
 533         int i, rd_fetch_cnt;
 534
 535         /* determine number of RD's we can fetch into the FIFO as one block */
 536         rd_size_rnd = (EIP197_RD64_FETCH_SIZE +
 537                        (BIT(priv->hwconfig.hwdataw) - 1)) >>
 538                       priv->hwconfig.hwdataw;
 539         if (priv->flags & SAFEXCEL_HW_EIP197) {
 540                 /* EIP197: try to fetch enough in 1 go to keep all pipes busy */
 541                 rd_fetch_cnt = (1 << priv->hwconfig.hwrfsize) / rd_size_rnd;
 542                 rd_fetch_cnt = min_t(uint, rd_fetch_cnt,
 543                                      (priv->config.pes * EIP197_FETCH_DEPTH));
 544         } else {
 545                 /* for the EIP97, just fetch all that fits minus 1 */
 546                 rd_fetch_cnt = ((1 << priv->hwconfig.hwrfsize) /
 547                                 rd_size_rnd) - 1;
 548         }
 549
 550         for (i = 0; i < priv->config.rings; i++) {
 551                 /* ring base address */
 552                 writel(lower_32_bits(priv->ring[i].rdr.base_dma),
 553                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_LO);
 554                 writel(upper_32_bits(priv->ring[i].rdr.base_dma),
 555                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_HI);
 556
 557                 writel(EIP197_xDR_DESC_MODE_64BIT | (priv->config.rd_offset << 14) |
 558                        priv->config.rd_size,
 559                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_DESC_SIZE);
 560
 561                 writel(((rd_fetch_cnt *
 562                          (rd_size_rnd << priv->hwconfig.hwdataw)) << 16) |
 563                        (rd_fetch_cnt * (priv->config.rd_offset / sizeof(u32))),
 564                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_CFG);
 565
 566                 /* Configure DMA tx control */
 567                 val = EIP197_HIA_xDR_CFG_WR_CACHE(WR_CACHE_3BITS);
 568                 val |= EIP197_HIA_xDR_CFG_RD_CACHE(RD_CACHE_3BITS);
 569                 val |= EIP197_HIA_xDR_WR_RES_BUF | EIP197_HIA_xDR_WR_CTRL_BUF;
 570                 writel(val,
 571                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_DMA_CFG);
 572
 573                 /* clear any pending interrupt */
 574                 writel(GENMASK(7, 0),
 575                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_STAT);
 576
 577                 /* enable ring interrupt */
 578                 val = readl(EIP197_HIA_AIC_R(priv) + EIP197_HIA_AIC_R_ENABLE_CTRL(i));
 579                 val |= EIP197_RDR_IRQ(i);
 580                 writel(val, EIP197_HIA_AIC_R(priv) + EIP197_HIA_AIC_R_ENABLE_CTRL(i));
 581         }
 582
 583         return 0;
 584 }
 585
 586 static int safexcel_hw_init(struct safexcel_crypto_priv *priv)
 587 {
 588         u32 val;
 589         int i, ret, pe, opbuflo, opbufhi;
 590
 591         dev_dbg(priv->dev, "HW init: using %d pipe(s) and %d ring(s)\n",
 592                 priv->config.pes, priv->config.rings);
 593
 594         /*
 595          * For EIP197's only set maximum number of TX commands to 2^5 = 32
 596          * Skip for the EIP97 as it does not have this field.
 597          */
 598         if (priv->flags & SAFEXCEL_HW_EIP197) {
 599                 val = readl(EIP197_HIA_AIC(priv) + EIP197_HIA_MST_CTRL);
 600                 val |= EIP197_MST_CTRL_TX_MAX_CMD(5);
 601                 writel(val, EIP197_HIA_AIC(priv) + EIP197_HIA_MST_CTRL);
 602         }
 603
 604         /* Configure wr/rd cache values */
 605         writel(EIP197_MST_CTRL_RD_CACHE(RD_CACHE_4BITS) |
 606                EIP197_MST_CTRL_WD_CACHE(WR_CACHE_4BITS),
 607                EIP197_HIA_GEN_CFG(priv) + EIP197_MST_CTRL);
 608
 609         /* Interrupts reset */
 610
 611         /* Disable all global interrupts */
 612         writel(0, EIP197_HIA_AIC_G(priv) + EIP197_HIA_AIC_G_ENABLE_CTRL);
 613
 614         /* Clear any pending interrupt */
 615         writel(GENMASK(31, 0), EIP197_HIA_AIC_G(priv) + EIP197_HIA_AIC_G_ACK);
 616
 617         /* Processing Engine configuration */
 618         for (pe = 0; pe < priv->config.pes; pe++) {
 619                 /* Data Fetch Engine configuration */
 620
 621                 /* Reset all DFE threads */
 622                 writel(EIP197_DxE_THR_CTRL_RESET_PE,
 623                        EIP197_HIA_DFE_THR(priv) + EIP197_HIA_DFE_THR_CTRL(pe));
 624
 625                 if (priv->flags & EIP197_PE_ARB)
 626                         /* Reset HIA input interface arbiter (if present) */
 627                         writel(EIP197_HIA_RA_PE_CTRL_RESET,
 628                                EIP197_HIA_AIC(priv) + EIP197_HIA_RA_PE_CTRL(pe));
 629
 630                 /* DMA transfer size to use */
 631                 val = EIP197_HIA_DFE_CFG_DIS_DEBUG;
 632                 val |= EIP197_HIA_DxE_CFG_MIN_DATA_SIZE(6) |
 633                        EIP197_HIA_DxE_CFG_MAX_DATA_SIZE(9);
 634                 val |= EIP197_HIA_DxE_CFG_MIN_CTRL_SIZE(6) |
 635                        EIP197_HIA_DxE_CFG_MAX_CTRL_SIZE(7);
 636                 val |= EIP197_HIA_DxE_CFG_DATA_CACHE_CTRL(RD_CACHE_3BITS);
 637                 val |= EIP197_HIA_DxE_CFG_CTRL_CACHE_CTRL(RD_CACHE_3BITS);
 638                 writel(val, EIP197_HIA_DFE(priv) + EIP197_HIA_DFE_CFG(pe));
 639
 640                 /* Leave the DFE threads reset state */
 641                 writel(0, EIP197_HIA_DFE_THR(priv) + EIP197_HIA_DFE_THR_CTRL(pe));
 642
 643                 /* Configure the processing engine thresholds */
 644                 writel(EIP197_PE_IN_xBUF_THRES_MIN(6) |
 645                        EIP197_PE_IN_xBUF_THRES_MAX(9),
 646                        EIP197_PE(priv) + EIP197_PE_IN_DBUF_THRES(pe));
 647                 writel(EIP197_PE_IN_xBUF_THRES_MIN(6) |
 648                        EIP197_PE_IN_xBUF_THRES_MAX(7),
 649                        EIP197_PE(priv) + EIP197_PE_IN_TBUF_THRES(pe));
 650
 651                 if (priv->flags & SAFEXCEL_HW_EIP197)
 652                         /* enable HIA input interface arbiter and rings */
 653                         writel(EIP197_HIA_RA_PE_CTRL_EN |
 654                                GENMASK(priv->config.rings - 1, 0),
 655                                EIP197_HIA_AIC(priv) + EIP197_HIA_RA_PE_CTRL(pe));
 656
 657                 /* Data Store Engine configuration */
 658
 659                 /* Reset all DSE threads */
 660                 writel(EIP197_DxE_THR_CTRL_RESET_PE,
 661                        EIP197_HIA_DSE_THR(priv) + EIP197_HIA_DSE_THR_CTRL(pe));
 662
 663                 /* Wait for all DSE threads to complete */
 664                 while ((readl(EIP197_HIA_DSE_THR(priv) + EIP197_HIA_DSE_THR_STAT(pe)) &
 665                         GENMASK(15, 12)) != GENMASK(15, 12))
 666                         ;
 667
 668                 /* DMA transfer size to use */
 669                 if (priv->hwconfig.hwnumpes > 4) {
 670                         opbuflo = 9;
 671                         opbufhi = 10;
 672                 } else {
 673                         opbuflo = 7;
 674                         opbufhi = 8;
 675                 }
 676                 val = EIP197_HIA_DSE_CFG_DIS_DEBUG;
 677                 val |= EIP197_HIA_DxE_CFG_MIN_DATA_SIZE(opbuflo) |
 678                        EIP197_HIA_DxE_CFG_MAX_DATA_SIZE(opbufhi);
 679                 val |= EIP197_HIA_DxE_CFG_DATA_CACHE_CTRL(WR_CACHE_3BITS);
 680                 val |= EIP197_HIA_DSE_CFG_ALWAYS_BUFFERABLE;
 681                 /* FIXME: instability issues can occur for EIP97 but disabling
 682                  * it impacts performance.
 683                  */
 684                 if (priv->flags & SAFEXCEL_HW_EIP197)
 685                         val |= EIP197_HIA_DSE_CFG_EN_SINGLE_WR;
 686                 writel(val, EIP197_HIA_DSE(priv) + EIP197_HIA_DSE_CFG(pe));
 687
 688                 /* Leave the DSE threads reset state */
 689                 writel(0, EIP197_HIA_DSE_THR(priv) + EIP197_HIA_DSE_THR_CTRL(pe));
 690
 691                 /* Configure the procesing engine thresholds */
 692                 writel(EIP197_PE_OUT_DBUF_THRES_MIN(opbuflo) |
 693                        EIP197_PE_OUT_DBUF_THRES_MAX(opbufhi),
 694                        EIP197_PE(priv) + EIP197_PE_OUT_DBUF_THRES(pe));
 695
 696                 /* Processing Engine configuration */
 697
 698                 /* Token & context configuration */
 699                 val = EIP197_PE_EIP96_TOKEN_CTRL_CTX_UPDATES |
 700                       EIP197_PE_EIP96_TOKEN_CTRL_NO_TOKEN_WAIT |
 701                       EIP197_PE_EIP96_TOKEN_CTRL_ENABLE_TIMEOUT;
 702                 writel(val, EIP197_PE(priv) + EIP197_PE_EIP96_TOKEN_CTRL(pe));
 703
 704                 /* H/W capabilities selection: just enable everything */
 705                 writel(EIP197_FUNCTION_ALL,
 706                        EIP197_PE(priv) + EIP197_PE_EIP96_FUNCTION_EN(pe));
 707                 writel(EIP197_FUNCTION_ALL,
 708                        EIP197_PE(priv) + EIP197_PE_EIP96_FUNCTION2_EN(pe));
 709         }
 710
 711         /* Command Descriptor Rings prepare */
 712         for (i = 0; i < priv->config.rings; i++) {
 713                 /* Clear interrupts for this ring */
 714                 writel(GENMASK(31, 0),
 715                        EIP197_HIA_AIC_R(priv) + EIP197_HIA_AIC_R_ENABLE_CLR(i));
 716
 717                 /* Disable external triggering */
 718                 writel(0, EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_CFG);
 719
 720                 /* Clear the pending prepared counter */
 721                 writel(EIP197_xDR_PREP_CLR_COUNT,
 722                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_PREP_COUNT);
 723
 724                 /* Clear the pending processed counter */
 725                 writel(EIP197_xDR_PROC_CLR_COUNT,
 726                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_PROC_COUNT);
 727
 728                 writel(0,
 729                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_PREP_PNTR);
 730                 writel(0,
 731                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_PROC_PNTR);
 732
 733                 writel((EIP197_DEFAULT_RING_SIZE * priv->config.cd_offset),
 734                        EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_RING_SIZE);
 735         }
 736
 737         /* Result Descriptor Ring prepare */
 738         for (i = 0; i < priv->config.rings; i++) {
 739                 /* Disable external triggering*/
 740                 writel(0, EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_CFG);
 741
 742                 /* Clear the pending prepared counter */
 743                 writel(EIP197_xDR_PREP_CLR_COUNT,
 744                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_PREP_COUNT);
 745
 746                 /* Clear the pending processed counter */
 747                 writel(EIP197_xDR_PROC_CLR_COUNT,
 748                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_PROC_COUNT);
 749
 750                 writel(0,
 751                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_PREP_PNTR);
 752                 writel(0,
 753                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_PROC_PNTR);
 754
 755                 /* Ring size */
 756                 writel((EIP197_DEFAULT_RING_SIZE * priv->config.rd_offset),
 757                        EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_RING_SIZE);
 758         }
 759
 760         for (pe = 0; pe < priv->config.pes; pe++) {
 761                 /* Enable command descriptor rings */
 762                 writel(EIP197_DxE_THR_CTRL_EN | GENMASK(priv->config.rings - 1, 0),
 763                        EIP197_HIA_DFE_THR(priv) + EIP197_HIA_DFE_THR_CTRL(pe));
 764
 765                 /* Enable result descriptor rings */
 766                 writel(EIP197_DxE_THR_CTRL_EN | GENMASK(priv->config.rings - 1, 0),
 767                        EIP197_HIA_DSE_THR(priv) + EIP197_HIA_DSE_THR_CTRL(pe));
 768         }
 769
 770         /* Clear any HIA interrupt */
 771         writel(GENMASK(30, 20), EIP197_HIA_AIC_G(priv) + EIP197_HIA_AIC_G_ACK);
 772
 773         if (priv->flags & EIP197_SIMPLE_TRC) {
 774                 writel(EIP197_STRC_CONFIG_INIT |
 775                        EIP197_STRC_CONFIG_LARGE_REC(EIP197_CS_TRC_REC_WC) |
 776                        EIP197_STRC_CONFIG_SMALL_REC(EIP197_CS_TRC_REC_WC),
 777                        priv->base + EIP197_STRC_CONFIG);
 778                 writel(EIP197_PE_EIP96_TOKEN_CTRL2_CTX_DONE,
 779                        EIP197_PE(priv) + EIP197_PE_EIP96_TOKEN_CTRL2(0));
 780         } else if (priv->flags & SAFEXCEL_HW_EIP197) {
 781                 ret = eip197_trc_cache_init(priv);
 782                 if (ret)
 783                         return ret;
 784         }
 785
 786         if (priv->flags & EIP197_ICE) {
 787                 ret = eip197_load_firmwares(priv);
 788                 if (ret)
 789                         return ret;
 790         }
 791
 792         return safexcel_hw_setup_cdesc_rings(priv) ?:
 793                safexcel_hw_setup_rdesc_rings(priv) ?:
 794                0;
 795 }
 796
 797 /* Called with ring's lock taken */
 798 static void safexcel_try_push_requests(struct safexcel_crypto_priv *priv,
 799                                        int ring)
 800 {
 801         int coal = min_t(int, priv->ring[ring].requests, EIP197_MAX_BATCH_SZ);
 802
 803         if (!coal)
 804                 return;
 805
 806         /* Configure when we want an interrupt */
 807         writel(EIP197_HIA_RDR_THRESH_PKT_MODE |
 808                EIP197_HIA_RDR_THRESH_PROC_PKT(coal),
 809                EIP197_HIA_RDR(priv, ring) + EIP197_HIA_xDR_THRESH);
 810 }
 811
 812 void safexcel_dequeue(struct safexcel_crypto_priv *priv, int ring)
 813 {
 814         struct crypto_async_request *req, *backlog;
 815         struct safexcel_context *ctx;
 816         int ret, nreq = 0, cdesc = 0, rdesc = 0, commands, results;
 817
 818         /* If a request wasn't properly dequeued because of a lack of resources,
 819          * proceeded it first,
 820          */
 821         req = priv->ring[ring].req;
 822         backlog = priv->ring[ring].backlog;
 823         if (req)
 824                 goto handle_req;
 825
 826         while (true) {
 827                 spin_lock_bh(&priv->ring[ring].queue_lock);
 828                 backlog = crypto_get_backlog(&priv->ring[ring].queue);
 829                 req = crypto_dequeue_request(&priv->ring[ring].queue);
 830                 spin_unlock_bh(&priv->ring[ring].queue_lock);
 831
 832                 if (!req) {
 833                         priv->ring[ring].req = NULL;
 834                         priv->ring[ring].backlog = NULL;
 835                         goto finalize;
 836                 }
 837
 838 handle_req:
 839                 ctx = crypto_tfm_ctx(req->tfm);
 840                 ret = ctx->send(req, ring, &commands, &results);
 841                 if (ret)
 842                         goto request_failed;
 843
 844                 if (backlog)
 845                         backlog->complete(backlog, -EINPROGRESS);
 846
 847                 /* In case the send() helper did not issue any command to push
 848                  * to the engine because the input data was cached, continue to
 849                  * dequeue other requests as this is valid and not an error.
 850                  */
 851                 if (!commands && !results)
 852                         continue;
 853
 854                 cdesc += commands;
 855                 rdesc += results;
 856                 nreq++;
 857         }
 858
 859 request_failed:
 860         /* Not enough resources to handle all the requests. Bail out and save
 861          * the request and the backlog for the next dequeue call (per-ring).
 862          */
 863         priv->ring[ring].req = req;
 864         priv->ring[ring].backlog = backlog;
 865
 866 finalize:
 867         if (!nreq)
 868                 return;
 869
 870         spin_lock_bh(&priv->ring[ring].lock);
 871
 872         priv->ring[ring].requests += nreq;
 873
 874         if (!priv->ring[ring].busy) {
 875                 safexcel_try_push_requests(priv, ring);
 876                 priv->ring[ring].busy = true;
 877         }
 878
 879         spin_unlock_bh(&priv->ring[ring].lock);
 880
 881         /* let the RDR know we have pending descriptors */
 882         writel((rdesc * priv->config.rd_offset),
 883                EIP197_HIA_RDR(priv, ring) + EIP197_HIA_xDR_PREP_COUNT);
 884
 885         /* let the CDR know we have pending descriptors */
 886         writel((cdesc * priv->config.cd_offset),
 887                EIP197_HIA_CDR(priv, ring) + EIP197_HIA_xDR_PREP_COUNT);
 888 }
 889
 890 inline int safexcel_rdesc_check_errors(struct safexcel_crypto_priv *priv,
 891                                        void *rdp)
 892 {
 893         struct safexcel_result_desc *rdesc = rdp;
 894         struct result_data_desc *result_data = rdp + priv->config.res_offset;
 895
 896         if (likely((!rdesc->last_seg) || /* Rest only valid if last seg! */
 897                    ((!rdesc->descriptor_overflow) &&
 898                     (!rdesc->buffer_overflow) &&
 899                     (!result_data->error_code))))
 900                 return 0;
 901
 902         if (rdesc->descriptor_overflow)
 903                 dev_err(priv->dev, "Descriptor overflow detected");
 904
 905         if (rdesc->buffer_overflow)
 906                 dev_err(priv->dev, "Buffer overflow detected");
 907
 908         if (result_data->error_code & 0x4066) {
 909                 /* Fatal error (bits 1,2,5,6 & 14) */
 910                 dev_err(priv->dev,
 911                         "result descriptor error (%x)",
 912                         result_data->error_code);
 913
 914                 return -EIO;
 915         } else if (result_data->error_code &
 916                    (BIT(7) | BIT(4) | BIT(3) | BIT(0))) {
 917                 /*
 918                  * Give priority over authentication fails:
 919                  * Blocksize, length & overflow errors,
 920                  * something wrong with the input!
 921                  */
 922                 return -EINVAL;
 923         } else if (result_data->error_code & BIT(9)) {
 924                 /* Authentication failed */
 925                 return -EBADMSG;
 926         }
 927
 928         /* All other non-fatal errors */
 929         return -EINVAL;
 930 }
 931
 932 inline void safexcel_rdr_req_set(struct safexcel_crypto_priv *priv,
 933                                  int ring,
 934                                  struct safexcel_result_desc *rdesc,
 935                                  struct crypto_async_request *req)
 936 {
 937         int i = safexcel_ring_rdr_rdesc_index(priv, ring, rdesc);
 938
 939         priv->ring[ring].rdr_req[i] = req;
 940 }
 941
 942 inline struct crypto_async_request *
 943 safexcel_rdr_req_get(struct safexcel_crypto_priv *priv, int ring)
 944 {
 945         int i = safexcel_ring_first_rdr_index(priv, ring);
 946
 947         return priv->ring[ring].rdr_req[i];
 948 }
 949
 950 void safexcel_complete(struct safexcel_crypto_priv *priv, int ring)
 951 {
 952         struct safexcel_command_desc *cdesc;
 953
 954         /* Acknowledge the command descriptors */
 955         do {
 956                 cdesc = safexcel_ring_next_rptr(priv, &priv->ring[ring].cdr);
 957                 if (IS_ERR(cdesc)) {
 958                         dev_err(priv->dev,
 959                                 "Could not retrieve the command descriptor\n");
 960                         return;
 961                 }
 962         } while (!cdesc->last_seg);
 963 }
 964
 965 void safexcel_inv_complete(struct crypto_async_request *req, int error)
 966 {
 967         struct safexcel_inv_result *result = req->data;
 968
 969         if (error == -EINPROGRESS)
 970                 return;
 971
 972         result->error = error;
 973         complete(&result->completion);
 974 }
 975
 976 int safexcel_invalidate_cache(struct crypto_async_request *async,
 977                               struct safexcel_crypto_priv *priv,
 978                               dma_addr_t ctxr_dma, int ring)
 979 {
 980         struct safexcel_command_desc *cdesc;
 981         struct safexcel_result_desc *rdesc;
 982         struct safexcel_token  *dmmy;
 983         int ret = 0;
 984
 985         /* Prepare command descriptor */
 986         cdesc = safexcel_add_cdesc(priv, ring, true, true, 0, 0, 0, ctxr_dma,
 987                                    &dmmy);
 988         if (IS_ERR(cdesc))
 989                 return PTR_ERR(cdesc);
 990
 991         cdesc->control_data.type = EIP197_TYPE_EXTENDED;
 992         cdesc->control_data.options = 0;
 993         cdesc->control_data.context_lo &= ~EIP197_CONTEXT_SIZE_MASK;
 994         cdesc->control_data.control0 = CONTEXT_CONTROL_INV_TR;
 995
 996         /* Prepare result descriptor */
 997         rdesc = safexcel_add_rdesc(priv, ring, true, true, 0, 0);
 998
 999         if (IS_ERR(rdesc)) {
1000                 ret = PTR_ERR(rdesc);
1001                 goto cdesc_rollback;
1002         }
1003
1004         safexcel_rdr_req_set(priv, ring, rdesc, async);
1005
1006         return ret;
1007
1008 cdesc_rollback:
1009         safexcel_ring_rollback_wptr(priv, &priv->ring[ring].cdr);
1010
1011         return ret;
1012 }
1013
1014 static inline void safexcel_handle_result_descriptor(struct safexcel_crypto_priv *priv,
1015                                                      int ring)
1016 {
1017         struct crypto_async_request *req;
1018         struct safexcel_context *ctx;
1019         int ret, i, nreq, ndesc, tot_descs, handled = 0;
1020         bool should_complete;
1021
1022 handle_results:
1023         tot_descs = 0;
1024
1025         nreq = readl(EIP197_HIA_RDR(priv, ring) + EIP197_HIA_xDR_PROC_COUNT);
1026         nreq >>= EIP197_xDR_PROC_xD_PKT_OFFSET;
1027         nreq &= EIP197_xDR_PROC_xD_PKT_MASK;
1028         if (!nreq)
1029                 goto requests_left;
1030
1031         for (i = 0; i < nreq; i++) {
1032                 req = safexcel_rdr_req_get(priv, ring);
1033
1034                 ctx = crypto_tfm_ctx(req->tfm);
1035                 ndesc = ctx->handle_result(priv, ring, req,
1036                                            &should_complete, &ret);
1037                 if (ndesc < 0) {
1038                         dev_err(priv->dev, "failed to handle result (%d)\n",
1039                                 ndesc);
1040                         goto acknowledge;
1041                 }
1042
1043                 if (should_complete) {
1044                         local_bh_disable();
1045                         req->complete(req, ret);
1046                         local_bh_enable();
1047                 }
1048
1049                 tot_descs += ndesc;
1050                 handled++;
1051         }
1052
1053 acknowledge:
1054         if (i)
1055                 writel(EIP197_xDR_PROC_xD_PKT(i) |
1056                        (tot_descs * priv->config.rd_offset),
1057                        EIP197_HIA_RDR(priv, ring) + EIP197_HIA_xDR_PROC_COUNT);
1058
1059         /* If the number of requests overflowed the counter, try to proceed more
1060          * requests.
1061          */
1062         if (nreq == EIP197_xDR_PROC_xD_PKT_MASK)
1063                 goto handle_results;
1064
1065 requests_left:
1066         spin_lock_bh(&priv->ring[ring].lock);
1067
1068         priv->ring[ring].requests -= handled;
1069         safexcel_try_push_requests(priv, ring);
1070
1071         if (!priv->ring[ring].requests)
1072                 priv->ring[ring].busy = false;
1073
1074         spin_unlock_bh(&priv->ring[ring].lock);
1075 }
1076
1077 static void safexcel_dequeue_work(struct work_struct *work)
1078 {
1079         struct safexcel_work_data *data =
1080                         container_of(work, struct safexcel_work_data, work);
1081
1082         safexcel_dequeue(data->priv, data->ring);
1083 }
1084
1085 struct safexcel_ring_irq_data {
1086         struct safexcel_crypto_priv *priv;
1087         int ring;
1088 };
1089
1090 static irqreturn_t safexcel_irq_ring(int irq, void *data)
1091 {
1092         struct safexcel_ring_irq_data *irq_data = data;
1093         struct safexcel_crypto_priv *priv = irq_data->priv;
1094         int ring = irq_data->ring, rc = IRQ_NONE;
1095         u32 status, stat;
1096
1097         status = readl(EIP197_HIA_AIC_R(priv) + EIP197_HIA_AIC_R_ENABLED_STAT(ring));
1098         if (!status)
1099                 return rc;
1100
1101         /* RDR interrupts */
1102         if (status & EIP197_RDR_IRQ(ring)) {
1103                 stat = readl(EIP197_HIA_RDR(priv, ring) + EIP197_HIA_xDR_STAT);
1104
1105                 if (unlikely(stat & EIP197_xDR_ERR)) {
1106                         /*
1107                          * Fatal error, the RDR is unusable and must be
1108                          * reinitialized. This should not happen under
1109                          * normal circumstances.
1110                          */
1111                         dev_err(priv->dev, "RDR: fatal error.\n");
1112                 } else if (likely(stat & EIP197_xDR_THRESH)) {
1113                         rc = IRQ_WAKE_THREAD;
1114                 }
1115
1116                 /* ACK the interrupts */
1117                 writel(stat & 0xff,
1118                        EIP197_HIA_RDR(priv, ring) + EIP197_HIA_xDR_STAT);
1119         }
1120
1121         /* ACK the interrupts */
1122         writel(status, EIP197_HIA_AIC_R(priv) + EIP197_HIA_AIC_R_ACK(ring));
1123
1124         return rc;
1125 }
1126
1127 static irqreturn_t safexcel_irq_ring_thread(int irq, void *data)
1128 {
1129         struct safexcel_ring_irq_data *irq_data = data;
1130         struct safexcel_crypto_priv *priv = irq_data->priv;
1131         int ring = irq_data->ring;
1132
1133         safexcel_handle_result_descriptor(priv, ring);
1134
1135         queue_work(priv->ring[ring].workqueue,
1136                    &priv->ring[ring].work_data.work);
1137
1138         return IRQ_HANDLED;
1139 }
1140
1141 static int safexcel_request_ring_irq(void *pdev, int irqid,
1142                                      int is_pci_dev,
1143                                      int ring_id,
1144                                      irq_handler_t handler,
1145                                      irq_handler_t threaded_handler,
1146                                      struct safexcel_ring_irq_data *ring_irq_priv)
1147 {
1148         int ret, irq, cpu;
1149         struct device *dev;
1150
1151         if (IS_ENABLED(CONFIG_PCI) && is_pci_dev) {
1152                 struct pci_dev *pci_pdev = pdev;
1153
1154                 dev = &pci_pdev->dev;
1155                 irq = pci_irq_vector(pci_pdev, irqid);
1156                 if (irq < 0) {
1157                         dev_err(dev, "unable to get device MSI IRQ %d (err %d)\n",
1158                                 irqid, irq);
1159                         return irq;
1160                 }
1161         } else if (IS_ENABLED(CONFIG_OF)) {
1162                 struct platform_device *plf_pdev = pdev;
1163                 char irq_name[6] = {0}; /* "ringX\0" */
1164
1165                 snprintf(irq_name, 6, "ring%d", irqid);
1166                 dev = &plf_pdev->dev;
1167                 irq = platform_get_irq_byname(plf_pdev, irq_name);
1168
1169                 if (irq < 0) {
1170                         dev_err(dev, "unable to get IRQ '%s' (err %d)\n",
1171                                 irq_name, irq);
1172                         return irq;
1173                 }
1174         } else {
1175                 return -ENXIO;
1176         }
1177
1178         ret = devm_request_threaded_irq(dev, irq, handler,
1179                                         threaded_handler, IRQF_ONESHOT,
1180                                         dev_name(dev), ring_irq_priv);
1181         if (ret) {
1182                 dev_err(dev, "unable to request IRQ %d\n", irq);
1183                 return ret;
1184         }
1185
1186         /* Set affinity */
1187         cpu = cpumask_local_spread(ring_id, NUMA_NO_NODE);
1188         irq_set_affinity_hint(irq, get_cpu_mask(cpu));
1189
1190         return irq;
1191 }
1192
1193 static struct safexcel_alg_template *safexcel_algs[] = {
1194         &safexcel_alg_ecb_des,
1195         &safexcel_alg_cbc_des,
1196         &safexcel_alg_ecb_des3_ede,
1197         &safexcel_alg_cbc_des3_ede,
1198         &safexcel_alg_ecb_aes,
1199         &safexcel_alg_cbc_aes,
1200         &safexcel_alg_cfb_aes,
1201         &safexcel_alg_ofb_aes,
1202         &safexcel_alg_ctr_aes,
1203         &safexcel_alg_md5,
1204         &safexcel_alg_sha1,
1205         &safexcel_alg_sha224,
1206         &safexcel_alg_sha256,
1207         &safexcel_alg_sha384,
1208         &safexcel_alg_sha512,
1209         &safexcel_alg_hmac_md5,
1210         &safexcel_alg_hmac_sha1,
1211         &safexcel_alg_hmac_sha224,
1212         &safexcel_alg_hmac_sha256,
1213         &safexcel_alg_hmac_sha384,
1214         &safexcel_alg_hmac_sha512,
1215         &safexcel_alg_authenc_hmac_sha1_cbc_aes,
1216         &safexcel_alg_authenc_hmac_sha224_cbc_aes,
1217         &safexcel_alg_authenc_hmac_sha256_cbc_aes,
1218         &safexcel_alg_authenc_hmac_sha384_cbc_aes,
1219         &safexcel_alg_authenc_hmac_sha512_cbc_aes,
1220         &safexcel_alg_authenc_hmac_sha1_cbc_des3_ede,
1221         &safexcel_alg_authenc_hmac_sha1_ctr_aes,
1222         &safexcel_alg_authenc_hmac_sha224_ctr_aes,
1223         &safexcel_alg_authenc_hmac_sha256_ctr_aes,
1224         &safexcel_alg_authenc_hmac_sha384_ctr_aes,
1225         &safexcel_alg_authenc_hmac_sha512_ctr_aes,
1226         &safexcel_alg_xts_aes,
1227         &safexcel_alg_gcm,
1228         &safexcel_alg_ccm,
1229         &safexcel_alg_crc32,
1230         &safexcel_alg_cbcmac,
1231         &safexcel_alg_xcbcmac,
1232         &safexcel_alg_cmac,
1233         &safexcel_alg_chacha20,
1234         &safexcel_alg_chachapoly,
1235         &safexcel_alg_chachapoly_esp,
1236         &safexcel_alg_sm3,
1237         &safexcel_alg_hmac_sm3,
1238         &safexcel_alg_ecb_sm4,
1239         &safexcel_alg_cbc_sm4,
1240         &safexcel_alg_ofb_sm4,
1241         &safexcel_alg_cfb_sm4,
1242         &safexcel_alg_ctr_sm4,
1243         &safexcel_alg_authenc_hmac_sha1_cbc_sm4,
1244         &safexcel_alg_authenc_hmac_sm3_cbc_sm4,
1245         &safexcel_alg_authenc_hmac_sha1_ctr_sm4,
1246         &safexcel_alg_authenc_hmac_sm3_ctr_sm4,
1247         &safexcel_alg_sha3_224,
1248         &safexcel_alg_sha3_256,
1249         &safexcel_alg_sha3_384,
1250         &safexcel_alg_sha3_512,
1251         &safexcel_alg_hmac_sha3_224,
1252         &safexcel_alg_hmac_sha3_256,
1253         &safexcel_alg_hmac_sha3_384,
1254         &safexcel_alg_hmac_sha3_512,
1255         &safexcel_alg_authenc_hmac_sha1_cbc_des,
1256         &safexcel_alg_authenc_hmac_sha256_cbc_des3_ede,
1257         &safexcel_alg_authenc_hmac_sha224_cbc_des3_ede,
1258         &safexcel_alg_authenc_hmac_sha512_cbc_des3_ede,
1259         &safexcel_alg_authenc_hmac_sha384_cbc_des3_ede,
1260         &safexcel_alg_authenc_hmac_sha256_cbc_des,
1261         &safexcel_alg_authenc_hmac_sha224_cbc_des,
1262         &safexcel_alg_authenc_hmac_sha512_cbc_des,
1263         &safexcel_alg_authenc_hmac_sha384_cbc_des,
1264         &safexcel_alg_rfc4106_gcm,
1265         &safexcel_alg_rfc4543_gcm,
1266         &safexcel_alg_rfc4309_ccm,
1267 };
1268
1269 static int safexcel_register_algorithms(struct safexcel_crypto_priv *priv)
1270 {
1271         int i, j, ret = 0;
1272
1273         for (i = 0; i < ARRAY_SIZE(safexcel_algs); i++) {
1274                 safexcel_algs[i]->priv = priv;
1275
1276                 /* Do we have all required base algorithms available? */
1277                 if ((safexcel_algs[i]->algo_mask & priv->hwconfig.algo_flags) !=
1278                     safexcel_algs[i]->algo_mask)
1279                         /* No, so don't register this ciphersuite */
1280                         continue;
1281
1282                 if (safexcel_algs[i]->type == SAFEXCEL_ALG_TYPE_SKCIPHER)
1283                         ret = crypto_register_skcipher(&safexcel_algs[i]->alg.skcipher);
1284                 else if (safexcel_algs[i]->type == SAFEXCEL_ALG_TYPE_AEAD)
1285                         ret = crypto_register_aead(&safexcel_algs[i]->alg.aead);
1286                 else
1287                         ret = crypto_register_ahash(&safexcel_algs[i]->alg.ahash);
1288
1289                 if (ret)
1290                         goto fail;
1291         }
1292
1293         return 0;
1294
1295 fail:
1296         for (j = 0; j < i; j++) {
1297                 /* Do we have all required base algorithms available? */
1298                 if ((safexcel_algs[j]->algo_mask & priv->hwconfig.algo_flags) !=
1299                     safexcel_algs[j]->algo_mask)
1300                         /* No, so don't unregister this ciphersuite */
1301                         continue;
1302
1303                 if (safexcel_algs[j]->type == SAFEXCEL_ALG_TYPE_SKCIPHER)
1304                         crypto_unregister_skcipher(&safexcel_algs[j]->alg.skcipher);
1305                 else if (safexcel_algs[j]->type == SAFEXCEL_ALG_TYPE_AEAD)
1306                         crypto_unregister_aead(&safexcel_algs[j]->alg.aead);
1307                 else
1308                         crypto_unregister_ahash(&safexcel_algs[j]->alg.ahash);
1309         }
1310
1311         return ret;
1312 }
1313
1314 static void safexcel_unregister_algorithms(struct safexcel_crypto_priv *priv)
1315 {
1316         int i;
1317
1318         for (i = 0; i < ARRAY_SIZE(safexcel_algs); i++) {
1319                 /* Do we have all required base algorithms available? */
1320                 if ((safexcel_algs[i]->algo_mask & priv->hwconfig.algo_flags) !=
1321                     safexcel_algs[i]->algo_mask)
1322                         /* No, so don't unregister this ciphersuite */
1323                         continue;
1324
1325                 if (safexcel_algs[i]->type == SAFEXCEL_ALG_TYPE_SKCIPHER)
1326                         crypto_unregister_skcipher(&safexcel_algs[i]->alg.skcipher);
1327                 else if (safexcel_algs[i]->type == SAFEXCEL_ALG_TYPE_AEAD)
1328                         crypto_unregister_aead(&safexcel_algs[i]->alg.aead);
1329                 else
1330                         crypto_unregister_ahash(&safexcel_algs[i]->alg.ahash);
1331         }
1332 }
1333
1334 static void safexcel_configure(struct safexcel_crypto_priv *priv)
1335 {
1336         u32 mask = BIT(priv->hwconfig.hwdataw) - 1;
1337
1338         priv->config.pes = priv->hwconfig.hwnumpes;
1339         priv->config.rings = min_t(u32, priv->hwconfig.hwnumrings, max_rings);
1340         /* Cannot currently support more rings than we have ring AICs! */
1341         priv->config.rings = min_t(u32, priv->config.rings,
1342                                         priv->hwconfig.hwnumraic);
1343
1344         priv->config.cd_size = EIP197_CD64_FETCH_SIZE;
1345         priv->config.cd_offset = (priv->config.cd_size + mask) & ~mask;
1346         priv->config.cdsh_offset = (EIP197_MAX_TOKENS + mask) & ~mask;
1347
1348         /* res token is behind the descr, but ofs must be rounded to buswdth */
1349         priv->config.res_offset = (EIP197_RD64_FETCH_SIZE + mask) & ~mask;
1350         /* now the size of the descr is this 1st part plus the result struct */
1351         priv->config.rd_size    = priv->config.res_offset +
1352                                   EIP197_RD64_RESULT_SIZE;
1353         priv->config.rd_offset = (priv->config.rd_size + mask) & ~mask;
1354
1355         /* convert dwords to bytes */
1356         priv->config.cd_offset *= sizeof(u32);
1357         priv->config.cdsh_offset *= sizeof(u32);
1358         priv->config.rd_offset *= sizeof(u32);
1359         priv->config.res_offset *= sizeof(u32);
1360 }
1361
1362 static void safexcel_init_register_offsets(struct safexcel_crypto_priv *priv)
1363 {
1364         struct safexcel_register_offsets *offsets = &priv->offsets;
1365
1366         if (priv->flags & SAFEXCEL_HW_EIP197) {
1367                 offsets->hia_aic        = EIP197_HIA_AIC_BASE;
1368                 offsets->hia_aic_g      = EIP197_HIA_AIC_G_BASE;
1369                 offsets->hia_aic_r      = EIP197_HIA_AIC_R_BASE;
1370                 offsets->hia_aic_xdr    = EIP197_HIA_AIC_xDR_BASE;
1371                 offsets->hia_dfe        = EIP197_HIA_DFE_BASE;
1372                 offsets->hia_dfe_thr    = EIP197_HIA_DFE_THR_BASE;
1373                 offsets->hia_dse        = EIP197_HIA_DSE_BASE;
1374                 offsets->hia_dse_thr    = EIP197_HIA_DSE_THR_BASE;
1375                 offsets->hia_gen_cfg    = EIP197_HIA_GEN_CFG_BASE;
1376                 offsets->pe             = EIP197_PE_BASE;
1377                 offsets->global         = EIP197_GLOBAL_BASE;
1378         } else {
1379                 offsets->hia_aic        = EIP97_HIA_AIC_BASE;
1380                 offsets->hia_aic_g      = EIP97_HIA_AIC_G_BASE;
1381                 offsets->hia_aic_r      = EIP97_HIA_AIC_R_BASE;
1382                 offsets->hia_aic_xdr    = EIP97_HIA_AIC_xDR_BASE;
1383                 offsets->hia_dfe        = EIP97_HIA_DFE_BASE;
1384                 offsets->hia_dfe_thr    = EIP97_HIA_DFE_THR_BASE;
1385                 offsets->hia_dse        = EIP97_HIA_DSE_BASE;
1386                 offsets->hia_dse_thr    = EIP97_HIA_DSE_THR_BASE;
1387                 offsets->hia_gen_cfg    = EIP97_HIA_GEN_CFG_BASE;
1388                 offsets->pe             = EIP97_PE_BASE;
1389                 offsets->global         = EIP97_GLOBAL_BASE;
1390         }
1391 }
1392
1393 /*
1394  * Generic part of probe routine, shared by platform and PCI driver
1395  *
1396  * Assumes IO resources have been mapped, private data mem has been allocated,
1397  * clocks have been enabled, device pointer has been assigned etc.
1398  *
1399  */
1400 static int safexcel_probe_generic(void *pdev,
1401                                   struct safexcel_crypto_priv *priv,
1402                                   int is_pci_dev)
1403 {
1404         struct device *dev = priv->dev;
1405         u32 peid, version, mask, val, hiaopt, hwopt, peopt;
1406         int i, ret, hwctg;
1407
1408         priv->context_pool = dmam_pool_create("safexcel-context", dev,
1409                                               sizeof(struct safexcel_context_record),
1410                                               1, 0);
1411         if (!priv->context_pool)
1412                 return -ENOMEM;
1413
1414         /*
1415          * First try the EIP97 HIA version regs
1416          * For the EIP197, this is guaranteed to NOT return any of the test
1417          * values
1418          */
1419         version = readl(priv->base + EIP97_HIA_AIC_BASE + EIP197_HIA_VERSION);
1420
1421         mask = 0;  /* do not swap */
1422         if (EIP197_REG_LO16(version) == EIP197_HIA_VERSION_LE) {
1423                 priv->hwconfig.hiaver = EIP197_VERSION_MASK(version);
1424         } else if (EIP197_REG_HI16(version) == EIP197_HIA_VERSION_BE) {
1425                 /* read back byte-swapped, so complement byte swap bits */
1426                 mask = EIP197_MST_CTRL_BYTE_SWAP_BITS;
1427                 priv->hwconfig.hiaver = EIP197_VERSION_SWAP(version);
1428         } else {
1429                 /* So it wasn't an EIP97 ... maybe it's an EIP197? */
1430                 version = readl(priv->base + EIP197_HIA_AIC_BASE +
1431                                 EIP197_HIA_VERSION);
1432                 if (EIP197_REG_LO16(version) == EIP197_HIA_VERSION_LE) {
1433                         priv->hwconfig.hiaver = EIP197_VERSION_MASK(version);
1434                         priv->flags |= SAFEXCEL_HW_EIP197;
1435                 } else if (EIP197_REG_HI16(version) ==
1436                            EIP197_HIA_VERSION_BE) {
1437                         /* read back byte-swapped, so complement swap bits */
1438                         mask = EIP197_MST_CTRL_BYTE_SWAP_BITS;
1439                         priv->hwconfig.hiaver = EIP197_VERSION_SWAP(version);
1440                         priv->flags |= SAFEXCEL_HW_EIP197;
1441                 } else {
1442                         return -ENODEV;
1443                 }
1444         }
1445
1446         /* Now initialize the reg offsets based on the probing info so far */
1447         safexcel_init_register_offsets(priv);
1448
1449         /*
1450          * If the version was read byte-swapped, we need to flip the device
1451          * swapping Keep in mind here, though, that what we write will also be
1452          * byte-swapped ...
1453          */
1454         if (mask) {
1455                 val = readl(EIP197_HIA_AIC(priv) + EIP197_HIA_MST_CTRL);
1456                 val = val ^ (mask >> 24); /* toggle byte swap bits */
1457                 writel(val, EIP197_HIA_AIC(priv) + EIP197_HIA_MST_CTRL);
1458         }
1459
1460         /*
1461          * We're not done probing yet! We may fall through to here if no HIA
1462          * was found at all. So, with the endianness presumably correct now and
1463          * the offsets setup, *really* probe for the EIP97/EIP197.
1464          */
1465         version = readl(EIP197_GLOBAL(priv) + EIP197_VERSION);
1466         if (((priv->flags & SAFEXCEL_HW_EIP197) &&
1467              (EIP197_REG_LO16(version) != EIP197_VERSION_LE) &&
1468              (EIP197_REG_LO16(version) != EIP196_VERSION_LE)) ||
1469             ((!(priv->flags & SAFEXCEL_HW_EIP197) &&
1470              (EIP197_REG_LO16(version) != EIP97_VERSION_LE)))) {
1471                 /*
1472                  * We did not find the device that matched our initial probing
1473                  * (or our initial probing failed) Report appropriate error.
1474                  */
1475                 dev_err(priv->dev, "Probing for EIP97/EIP19x failed - no such device (read %08x)\n",
1476                         version);
1477                 return -ENODEV;
1478         }
1479
1480         priv->hwconfig.hwver = EIP197_VERSION_MASK(version);
1481         hwctg = version >> 28;
1482         peid = version & 255;
1483
1484         /* Detect EIP206 processing pipe */
1485         version = readl(EIP197_PE(priv) + + EIP197_PE_VERSION(0));
1486         if (EIP197_REG_LO16(version) != EIP206_VERSION_LE) {
1487                 dev_err(priv->dev, "EIP%d: EIP206 not detected\n", peid);
1488                 return -ENODEV;
1489         }
1490         priv->hwconfig.ppver = EIP197_VERSION_MASK(version);
1491
1492         /* Detect EIP96 packet engine and version */
1493         version = readl(EIP197_PE(priv) + EIP197_PE_EIP96_VERSION(0));
1494         if (EIP197_REG_LO16(version) != EIP96_VERSION_LE) {
1495                 dev_err(dev, "EIP%d: EIP96 not detected.\n", peid);
1496                 return -ENODEV;
1497         }
1498         priv->hwconfig.pever = EIP197_VERSION_MASK(version);
1499
1500         hwopt = readl(EIP197_GLOBAL(priv) + EIP197_OPTIONS);
1501         hiaopt = readl(EIP197_HIA_AIC(priv) + EIP197_HIA_OPTIONS);
1502
1503         priv->hwconfig.icever = 0;
1504         priv->hwconfig.ocever = 0;
1505         priv->hwconfig.psever = 0;
1506         if (priv->flags & SAFEXCEL_HW_EIP197) {
1507                 /* EIP197 */
1508                 peopt = readl(EIP197_PE(priv) + EIP197_PE_OPTIONS(0));
1509
1510                 priv->hwconfig.hwdataw  = (hiaopt >> EIP197_HWDATAW_OFFSET) &
1511                                           EIP197_HWDATAW_MASK;
1512                 priv->hwconfig.hwcfsize = ((hiaopt >> EIP197_CFSIZE_OFFSET) &
1513                                            EIP197_CFSIZE_MASK) +
1514                                           EIP197_CFSIZE_ADJUST;
1515                 priv->hwconfig.hwrfsize = ((hiaopt >> EIP197_RFSIZE_OFFSET) &
1516                                            EIP197_RFSIZE_MASK) +
1517                                           EIP197_RFSIZE_ADJUST;
1518                 priv->hwconfig.hwnumpes = (hiaopt >> EIP197_N_PES_OFFSET) &
1519                                           EIP197_N_PES_MASK;
1520                 priv->hwconfig.hwnumrings = (hiaopt >> EIP197_N_RINGS_OFFSET) &
1521                                             EIP197_N_RINGS_MASK;
1522                 if (hiaopt & EIP197_HIA_OPT_HAS_PE_ARB)
1523                         priv->flags |= EIP197_PE_ARB;
1524                 if (EIP206_OPT_ICE_TYPE(peopt) == 1) {
1525                         priv->flags |= EIP197_ICE;
1526                         /* Detect ICE EIP207 class. engine and version */
1527                         version = readl(EIP197_PE(priv) +
1528                                   EIP197_PE_ICE_VERSION(0));
1529                         if (EIP197_REG_LO16(version) != EIP207_VERSION_LE) {
1530                                 dev_err(dev, "EIP%d: ICE EIP207 not detected.\n",
1531                                         peid);
1532                                 return -ENODEV;
1533                         }
1534                         priv->hwconfig.icever = EIP197_VERSION_MASK(version);
1535                 }
1536                 if (EIP206_OPT_OCE_TYPE(peopt) == 1) {
1537                         priv->flags |= EIP197_OCE;
1538                         /* Detect EIP96PP packet stream editor and version */
1539                         version = readl(EIP197_PE(priv) + EIP197_PE_PSE_VERSION(0));
1540                         if (EIP197_REG_LO16(version) != EIP96_VERSION_LE) {
1541                                 dev_err(dev, "EIP%d: EIP96PP not detected.\n", peid);
1542                                 return -ENODEV;
1543                         }
1544                         priv->hwconfig.psever = EIP197_VERSION_MASK(version);
1545                         /* Detect OCE EIP207 class. engine and version */
1546                         version = readl(EIP197_PE(priv) +
1547                                   EIP197_PE_ICE_VERSION(0));
1548                         if (EIP197_REG_LO16(version) != EIP207_VERSION_LE) {
1549                                 dev_err(dev, "EIP%d: OCE EIP207 not detected.\n",
1550                                         peid);
1551                                 return -ENODEV;
1552                         }
1553                         priv->hwconfig.ocever = EIP197_VERSION_MASK(version);
1554                 }
1555                 /* If not a full TRC, then assume simple TRC */
1556                 if (!(hwopt & EIP197_OPT_HAS_TRC))
1557                         priv->flags |= EIP197_SIMPLE_TRC;
1558                 /* EIP197 always has SOME form of TRC */
1559                 priv->flags |= EIP197_TRC_CACHE;
1560         } else {
1561                 /* EIP97 */
1562                 priv->hwconfig.hwdataw  = (hiaopt >> EIP197_HWDATAW_OFFSET) &
1563                                           EIP97_HWDATAW_MASK;
1564                 priv->hwconfig.hwcfsize = (hiaopt >> EIP97_CFSIZE_OFFSET) &
1565                                           EIP97_CFSIZE_MASK;
1566                 priv->hwconfig.hwrfsize = (hiaopt >> EIP97_RFSIZE_OFFSET) &
1567                                           EIP97_RFSIZE_MASK;
1568                 priv->hwconfig.hwnumpes = 1; /* by definition */
1569                 priv->hwconfig.hwnumrings = (hiaopt >> EIP197_N_RINGS_OFFSET) &
1570                                             EIP197_N_RINGS_MASK;
1571         }
1572
1573         /* Scan for ring AIC's */
1574         for (i = 0; i < EIP197_MAX_RING_AIC; i++) {
1575                 version = readl(EIP197_HIA_AIC_R(priv) +
1576                                 EIP197_HIA_AIC_R_VERSION(i));
1577                 if (EIP197_REG_LO16(version) != EIP201_VERSION_LE)
1578                         break;
1579         }
1580         priv->hwconfig.hwnumraic = i;
1581         /* Low-end EIP196 may not have any ring AIC's ... */
1582         if (!priv->hwconfig.hwnumraic) {
1583                 dev_err(priv->dev, "No ring interrupt controller present!\n");
1584                 return -ENODEV;
1585         }
1586
1587         /* Get supported algorithms from EIP96 transform engine */
1588         priv->hwconfig.algo_flags = readl(EIP197_PE(priv) +
1589                                     EIP197_PE_EIP96_OPTIONS(0));
1590
1591         /* Print single info line describing what we just detected */
1592         dev_info(priv->dev, "EIP%d:%x(%d,%d,%d,%d)-HIA:%x(%d,%d,%d),PE:%x/%x(alg:%08x)/%x/%x/%x\n",
1593                  peid, priv->hwconfig.hwver, hwctg, priv->hwconfig.hwnumpes,
1594                  priv->hwconfig.hwnumrings, priv->hwconfig.hwnumraic,
1595                  priv->hwconfig.hiaver, priv->hwconfig.hwdataw,
1596                  priv->hwconfig.hwcfsize, priv->hwconfig.hwrfsize,
1597                  priv->hwconfig.ppver, priv->hwconfig.pever,
1598                  priv->hwconfig.algo_flags, priv->hwconfig.icever,
1599                  priv->hwconfig.ocever, priv->hwconfig.psever);
1600
1601         safexcel_configure(priv);
1602
1603         if (IS_ENABLED(CONFIG_PCI) && priv->version == EIP197_DEVBRD) {
1604                 /*
1605                  * Request MSI vectors for global + 1 per ring -
1606                  * or just 1 for older dev images
1607                  */
1608                 struct pci_dev *pci_pdev = pdev;
1609
1610                 ret = pci_alloc_irq_vectors(pci_pdev,
1611                                             priv->config.rings + 1,
1612                                             priv->config.rings + 1,
1613                                             PCI_IRQ_MSI | PCI_IRQ_MSIX);
1614                 if (ret < 0) {
1615                         dev_err(dev, "Failed to allocate PCI MSI interrupts\n");
1616                         return ret;
1617                 }
1618         }
1619
1620         /* Register the ring IRQ handlers and configure the rings */
1621         priv->ring = devm_kcalloc(dev, priv->config.rings,
1622                                   sizeof(*priv->ring),
1623                                   GFP_KERNEL);
1624         if (!priv->ring)
1625                 return -ENOMEM;
1626
1627         for (i = 0; i < priv->config.rings; i++) {
1628                 char wq_name[9] = {0};
1629                 int irq;
1630                 struct safexcel_ring_irq_data *ring_irq;
1631
1632                 ret = safexcel_init_ring_descriptors(priv,
1633                                                      &priv->ring[i].cdr,
1634                                                      &priv->ring[i].rdr);
1635                 if (ret) {
1636                         dev_err(dev, "Failed to initialize rings\n");
1637                         return ret;
1638                 }
1639
1640                 priv->ring[i].rdr_req = devm_kcalloc(dev,
1641                         EIP197_DEFAULT_RING_SIZE,
1642                         sizeof(*priv->ring[i].rdr_req),
1643                         GFP_KERNEL);
1644                 if (!priv->ring[i].rdr_req)
1645                         return -ENOMEM;
1646
1647                 ring_irq = devm_kzalloc(dev, sizeof(*ring_irq), GFP_KERNEL);
1648                 if (!ring_irq)
1649                         return -ENOMEM;
1650
1651                 ring_irq->priv = priv;
1652                 ring_irq->ring = i;
1653
1654                 irq = safexcel_request_ring_irq(pdev,
1655                                                 EIP197_IRQ_NUMBER(i, is_pci_dev),
1656                                                 is_pci_dev,
1657                                                 i,
1658                                                 safexcel_irq_ring,
1659                                                 safexcel_irq_ring_thread,
1660                                                 ring_irq);
1661                 if (irq < 0) {
1662                         dev_err(dev, "Failed to get IRQ ID for ring %d\n", i);
1663                         return irq;
1664                 }
1665
1666                 priv->ring[i].irq = irq;
1667                 priv->ring[i].work_data.priv = priv;
1668                 priv->ring[i].work_data.ring = i;
1669                 INIT_WORK(&priv->ring[i].work_data.work,
1670                           safexcel_dequeue_work);
1671
1672                 snprintf(wq_name, 9, "wq_ring%d", i);
1673                 priv->ring[i].workqueue =
1674                         create_singlethread_workqueue(wq_name);
1675                 if (!priv->ring[i].workqueue)
1676                         return -ENOMEM;
1677
1678                 priv->ring[i].requests = 0;
1679                 priv->ring[i].busy = false;
1680
1681                 crypto_init_queue(&priv->ring[i].queue,
1682                                   EIP197_DEFAULT_RING_SIZE);
1683
1684                 spin_lock_init(&priv->ring[i].lock);
1685                 spin_lock_init(&priv->ring[i].queue_lock);
1686         }
1687
1688         atomic_set(&priv->ring_used, 0);
1689
1690         ret = safexcel_hw_init(priv);
1691         if (ret) {
1692                 dev_err(dev, "HW init failed (%d)\n", ret);
1693                 return ret;
1694         }
1695
1696         ret = safexcel_register_algorithms(priv);
1697         if (ret) {
1698                 dev_err(dev, "Failed to register algorithms (%d)\n", ret);
1699                 return ret;
1700         }
1701
1702         return 0;
1703 }
1704
1705 static void safexcel_hw_reset_rings(struct safexcel_crypto_priv *priv)
1706 {
1707         int i;
1708
1709         for (i = 0; i < priv->config.rings; i++) {
1710                 /* clear any pending interrupt */
1711                 writel(GENMASK(5, 0), EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_STAT);
1712                 writel(GENMASK(7, 0), EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_STAT);
1713
1714                 /* Reset the CDR base address */
1715                 writel(0, EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_LO);
1716                 writel(0, EIP197_HIA_CDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_HI);
1717
1718                 /* Reset the RDR base address */
1719                 writel(0, EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_LO);
1720                 writel(0, EIP197_HIA_RDR(priv, i) + EIP197_HIA_xDR_RING_BASE_ADDR_HI);
1721         }
1722 }
1723
1724 /* for Device Tree platform driver */
1725
1726 static int safexcel_probe(struct platform_device *pdev)
1727 {
1728         struct device *dev = &pdev->dev;
1729         struct safexcel_crypto_priv *priv;
1730         int ret;
1731
1732         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1733         if (!priv)
1734                 return -ENOMEM;
1735
1736         priv->dev = dev;
1737         priv->version = (enum safexcel_eip_version)of_device_get_match_data(dev);
1738
1739         platform_set_drvdata(pdev, priv);
1740
1741         priv->base = devm_platform_ioremap_resource(pdev, 0);
1742         if (IS_ERR(priv->base)) {
1743                 dev_err(dev, "failed to get resource\n");
1744                 return PTR_ERR(priv->base);
1745         }
1746
1747         priv->clk = devm_clk_get(&pdev->dev, NULL);
1748         ret = PTR_ERR_OR_ZERO(priv->clk);
1749         /* The clock isn't mandatory */
1750         if  (ret != -ENOENT) {
1751                 if (ret)
1752                         return ret;
1753
1754                 ret = clk_prepare_enable(priv->clk);
1755                 if (ret) {
1756                         dev_err(dev, "unable to enable clk (%d)\n", ret);
1757                         return ret;
1758                 }
1759         }
1760
1761         priv->reg_clk = devm_clk_get(&pdev->dev, "reg");
1762         ret = PTR_ERR_OR_ZERO(priv->reg_clk);
1763         /* The clock isn't mandatory */
1764         if  (ret != -ENOENT) {
1765                 if (ret)
1766                         goto err_core_clk;
1767
1768                 ret = clk_prepare_enable(priv->reg_clk);
1769                 if (ret) {
1770                         dev_err(dev, "unable to enable reg clk (%d)\n", ret);
1771                         goto err_core_clk;
1772                 }
1773         }
1774
1775         ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
1776         if (ret)
1777                 goto err_reg_clk;
1778
1779         /* Generic EIP97/EIP197 device probing */
1780         ret = safexcel_probe_generic(pdev, priv, 0);
1781         if (ret)
1782                 goto err_reg_clk;
1783
1784         return 0;
1785
1786 err_reg_clk:
1787         clk_disable_unprepare(priv->reg_clk);
1788 err_core_clk:
1789         clk_disable_unprepare(priv->clk);
1790         return ret;
1791 }
1792
1793 static int safexcel_remove(struct platform_device *pdev)
1794 {
1795         struct safexcel_crypto_priv *priv = platform_get_drvdata(pdev);
1796         int i;
1797
1798         safexcel_unregister_algorithms(priv);
1799         safexcel_hw_reset_rings(priv);
1800
1801         clk_disable_unprepare(priv->reg_clk);
1802         clk_disable_unprepare(priv->clk);
1803
1804         for (i = 0; i < priv->config.rings; i++) {
1805                 irq_set_affinity_hint(priv->ring[i].irq, NULL);
1806                 destroy_workqueue(priv->ring[i].workqueue);
1807         }
1808
1809         return 0;
1810 }
1811
1812 static const struct of_device_id safexcel_of_match_table[] = {
1813         {
1814                 .compatible = "inside-secure,safexcel-eip97ies",
1815                 .data = (void *)EIP97IES_MRVL,
1816         },
1817         {
1818                 .compatible = "inside-secure,safexcel-eip197b",
1819                 .data = (void *)EIP197B_MRVL,
1820         },
1821         {
1822                 .compatible = "inside-secure,safexcel-eip197d",
1823                 .data = (void *)EIP197D_MRVL,
1824         },
1825         /* For backward compatibility and intended for generic use */
1826         {
1827                 .compatible = "inside-secure,safexcel-eip97",
1828                 .data = (void *)EIP97IES_MRVL,
1829         },
1830         {
1831                 .compatible = "inside-secure,safexcel-eip197",
1832                 .data = (void *)EIP197B_MRVL,
1833         },
1834         {},
1835 };
1836
1837 static struct platform_driver  crypto_safexcel = {
1838         .probe          = safexcel_probe,
1839         .remove         = safexcel_remove,
1840         .driver         = {
1841                 .name   = "crypto-safexcel",
1842                 .of_match_table = safexcel_of_match_table,
1843         },
1844 };
1845
1846 /* PCIE devices - i.e. Inside Secure development boards */
1847
1848 static int safexcel_pci_probe(struct pci_dev *pdev,
1849                                const struct pci_device_id *ent)
1850 {
1851         struct device *dev = &pdev->dev;
1852         struct safexcel_crypto_priv *priv;
1853         void __iomem *pciebase;
1854         int rc;
1855         u32 val;
1856
1857         dev_dbg(dev, "Probing PCIE device: vendor %04x, device %04x, subv %04x, subdev %04x, ctxt %lx\n",
1858                 ent->vendor, ent->device, ent->subvendor,
1859                 ent->subdevice, ent->driver_data);
1860
1861         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1862         if (!priv)
1863                 return -ENOMEM;
1864
1865         priv->dev = dev;
1866         priv->version = (enum safexcel_eip_version)ent->driver_data;
1867
1868         pci_set_drvdata(pdev, priv);
1869
1870         /* enable the device */
1871         rc = pcim_enable_device(pdev);
1872         if (rc) {
1873                 dev_err(dev, "Failed to enable PCI device\n");
1874                 return rc;
1875         }
1876
1877         /* take ownership of PCI BAR0 */
1878         rc = pcim_iomap_regions(pdev, 1, "crypto_safexcel");
1879         if (rc) {
1880                 dev_err(dev, "Failed to map IO region for BAR0\n");
1881                 return rc;
1882         }
1883         priv->base = pcim_iomap_table(pdev)[0];
1884
1885         if (priv->version == EIP197_DEVBRD) {
1886                 dev_dbg(dev, "Device identified as FPGA based development board - applying HW reset\n");
1887
1888                 rc = pcim_iomap_regions(pdev, 4, "crypto_safexcel");
1889                 if (rc) {
1890                         dev_err(dev, "Failed to map IO region for BAR4\n");
1891                         return rc;
1892                 }
1893
1894                 pciebase = pcim_iomap_table(pdev)[2];
1895                 val = readl(pciebase + EIP197_XLX_IRQ_BLOCK_ID_ADDR);
1896                 if ((val >> 16) == EIP197_XLX_IRQ_BLOCK_ID_VALUE) {
1897                         dev_dbg(dev, "Detected Xilinx PCIE IRQ block version %d, multiple MSI support enabled\n",
1898                                 (val & 0xff));
1899
1900                         /* Setup MSI identity map mapping */
1901                         writel(EIP197_XLX_USER_VECT_LUT0_IDENT,
1902                                pciebase + EIP197_XLX_USER_VECT_LUT0_ADDR);
1903                         writel(EIP197_XLX_USER_VECT_LUT1_IDENT,
1904                                pciebase + EIP197_XLX_USER_VECT_LUT1_ADDR);
1905                         writel(EIP197_XLX_USER_VECT_LUT2_IDENT,
1906                                pciebase + EIP197_XLX_USER_VECT_LUT2_ADDR);
1907                         writel(EIP197_XLX_USER_VECT_LUT3_IDENT,
1908                                pciebase + EIP197_XLX_USER_VECT_LUT3_ADDR);
1909
1910                         /* Enable all device interrupts */
1911                         writel(GENMASK(31, 0),
1912                                pciebase + EIP197_XLX_USER_INT_ENB_MSK);
1913                 } else {
1914                         dev_err(dev, "Unrecognised IRQ block identifier %x\n",
1915                                 val);
1916                         return -ENODEV;
1917                 }
1918
1919                 /* HW reset FPGA dev board */
1920                 /* assert reset */
1921                 writel(1, priv->base + EIP197_XLX_GPIO_BASE);
1922                 wmb(); /* maintain strict ordering for accesses here */
1923                 /* deassert reset */
1924                 writel(0, priv->base + EIP197_XLX_GPIO_BASE);
1925                 wmb(); /* maintain strict ordering for accesses here */
1926         }
1927
1928         /* enable bus mastering */
1929         pci_set_master(pdev);
1930
1931         /* Generic EIP97/EIP197 device probing */
1932         rc = safexcel_probe_generic(pdev, priv, 1);
1933         return rc;
1934 }
1935
1936 static void safexcel_pci_remove(struct pci_dev *pdev)
1937 {
1938         struct safexcel_crypto_priv *priv = pci_get_drvdata(pdev);
1939         int i;
1940
1941         safexcel_unregister_algorithms(priv);
1942
1943         for (i = 0; i < priv->config.rings; i++)
1944                 destroy_workqueue(priv->ring[i].workqueue);
1945
1946         safexcel_hw_reset_rings(priv);
1947 }
1948
1949 static const struct pci_device_id safexcel_pci_ids[] = {
1950         {
1951                 PCI_DEVICE_SUB(PCI_VENDOR_ID_XILINX, 0x9038,
1952                                0x16ae, 0xc522),
1953                 .driver_data = EIP197_DEVBRD,
1954         },
1955         {},
1956 };
1957
1958 MODULE_DEVICE_TABLE(pci, safexcel_pci_ids);
1959
1960 static struct pci_driver safexcel_pci_driver = {
1961         .name          = "crypto-safexcel",
1962         .id_table      = safexcel_pci_ids,
1963         .probe         = safexcel_pci_probe,
1964         .remove        = safexcel_pci_remove,
1965 };
1966
1967 static int __init safexcel_init(void)
1968 {
1969         int ret;
1970
1971         /* Register PCI driver */
1972         ret = pci_register_driver(&safexcel_pci_driver);
1973
1974         /* Register platform driver */
1975         if (IS_ENABLED(CONFIG_OF) && !ret) {
1976                 ret = platform_driver_register(&crypto_safexcel);
1977                 if (ret)
1978                         pci_unregister_driver(&safexcel_pci_driver);
1979         }
1980
1981         return ret;
1982 }
1983
1984 static void __exit safexcel_exit(void)
1985 {
1986         /* Unregister platform driver */
1987         if (IS_ENABLED(CONFIG_OF))
1988                 platform_driver_unregister(&crypto_safexcel);
1989
1990         /* Unregister PCI driver if successfully registered before */
1991         pci_unregister_driver(&safexcel_pci_driver);
1992 }
1993
1994 module_init(safexcel_init);
1995 module_exit(safexcel_exit);
1996
1997 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
1998 MODULE_AUTHOR("Ofer Heifetz <oferh@marvell.com>");
1999 MODULE_AUTHOR("Igal Liberman <igall@marvell.com>");
2000 MODULE_DESCRIPTION("Support for SafeXcel cryptographic engines: EIP97 & EIP197");
2001 MODULE_LICENSE("GPL v2");