drivers/crypto/ccp/ccp_dev.c

   1 /*   SPDX-License-Identifier: BSD-3-Clause
   2  *   Copyright(c) 2018 Advanced Micro Devices, Inc. All rights reserved.
   3  */
   4
   5 #include <dirent.h>
   6 #include <fcntl.h>
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include <sys/mman.h>
  10 #include <sys/queue.h>
  11 #include <sys/types.h>
  12 #include <sys/file.h>
  13 #include <unistd.h>
  14
  15 #include <rte_hexdump.h>
  16 #include <rte_memzone.h>
  17 #include <rte_malloc.h>
  18 #include <rte_memory.h>
  19 #include <rte_spinlock.h>
  20 #include <rte_string_fns.h>
  21
  22 #include "ccp_dev.h"
  23 #include "ccp_pci.h"
  24 #include "ccp_pmd_private.h"
  25
  26 struct ccp_list ccp_list = TAILQ_HEAD_INITIALIZER(ccp_list);
  27 static int ccp_dev_id;
  28
  29 int
  30 ccp_dev_start(struct rte_cryptodev *dev)
  31 {
  32         struct ccp_private *priv = dev->data->dev_private;
  33
  34         priv->last_dev = TAILQ_FIRST(&ccp_list);
  35         return 0;
  36 }
  37
  38 struct ccp_queue *
  39 ccp_allot_queue(struct rte_cryptodev *cdev, int slot_req)
  40 {
  41         int i, ret = 0;
  42         struct ccp_device *dev;
  43         struct ccp_private *priv = cdev->data->dev_private;
  44
  45         dev = TAILQ_NEXT(priv->last_dev, next);
  46         if (unlikely(dev == NULL))
  47                 dev = TAILQ_FIRST(&ccp_list);
  48         priv->last_dev = dev;
  49         if (dev->qidx >= dev->cmd_q_count)
  50                 dev->qidx = 0;
  51         ret = rte_atomic64_read(&dev->cmd_q[dev->qidx].free_slots);
  52         if (ret >= slot_req)
  53                 return &dev->cmd_q[dev->qidx];
  54         for (i = 0; i < dev->cmd_q_count; i++) {
  55                 dev->qidx++;
  56                 if (dev->qidx >= dev->cmd_q_count)
  57                         dev->qidx = 0;
  58                 ret = rte_atomic64_read(&dev->cmd_q[dev->qidx].free_slots);
  59                 if (ret >= slot_req)
  60                         return &dev->cmd_q[dev->qidx];
  61         }
  62         return NULL;
  63 }
  64
  65 static const struct rte_memzone *
  66 ccp_queue_dma_zone_reserve(const char *queue_name,
  67                            uint32_t queue_size,
  68                            int socket_id)
  69 {
  70         const struct rte_memzone *mz;
  71
  72         mz = rte_memzone_lookup(queue_name);
  73         if (mz != 0) {
  74                 if (((size_t)queue_size <= mz->len) &&
  75                     ((socket_id == SOCKET_ID_ANY) ||
  76                      (socket_id == mz->socket_id))) {
  77                         CCP_LOG_INFO("re-use memzone already "
  78                                      "allocated for %s", queue_name);
  79                         return mz;
  80                 }
  81                 CCP_LOG_ERR("Incompatible memzone already "
  82                             "allocated %s, size %u, socket %d. "
  83                             "Requested size %u, socket %u",
  84                             queue_name, (uint32_t)mz->len,
  85                             mz->socket_id, queue_size, socket_id);
  86                 return NULL;
  87         }
  88
  89         CCP_LOG_INFO("Allocate memzone for %s, size %u on socket %u",
  90                      queue_name, queue_size, socket_id);
  91
  92         return rte_memzone_reserve_aligned(queue_name, queue_size,
  93                         socket_id, RTE_MEMZONE_IOVA_CONTIG, queue_size);
  94 }
  95
  96 /* bitmap support apis */
  97 static inline void
  98 ccp_set_bit(unsigned long *bitmap, int n)
  99 {
 100         __sync_fetch_and_or(&bitmap[WORD_OFFSET(n)], (1UL << BIT_OFFSET(n)));
 101 }
 102
 103 static inline void
 104 ccp_clear_bit(unsigned long *bitmap, int n)
 105 {
 106         __sync_fetch_and_and(&bitmap[WORD_OFFSET(n)], ~(1UL << BIT_OFFSET(n)));
 107 }
 108
 109 static inline uint32_t
 110 ccp_get_bit(unsigned long *bitmap, int n)
 111 {
 112         return ((bitmap[WORD_OFFSET(n)] & (1 << BIT_OFFSET(n))) != 0);
 113 }
 114
 115
 116 static inline uint32_t
 117 ccp_ffz(unsigned long word)
 118 {
 119         unsigned long first_zero;
 120
 121         first_zero = __builtin_ffsl(~word);
 122         return first_zero ? (first_zero - 1) :
 123                 BITS_PER_WORD;
 124 }
 125
 126 static inline uint32_t
 127 ccp_find_first_zero_bit(unsigned long *addr, uint32_t limit)
 128 {
 129         uint32_t i;
 130         uint32_t nwords = 0;
 131
 132         nwords = (limit - 1) / BITS_PER_WORD + 1;
 133         for (i = 0; i < nwords; i++) {
 134                 if (addr[i] == 0UL)
 135                         return i * BITS_PER_WORD;
 136                 if (addr[i] < ~(0UL))
 137                         break;
 138         }
 139         return (i == nwords) ? limit : i * BITS_PER_WORD + ccp_ffz(addr[i]);
 140 }
 141
 142 static void
 143 ccp_bitmap_set(unsigned long *map, unsigned int start, int len)
 144 {
 145         unsigned long *p = map + WORD_OFFSET(start);
 146         const unsigned int size = start + len;
 147         int bits_to_set = BITS_PER_WORD - (start % BITS_PER_WORD);
 148         unsigned long mask_to_set = CCP_BITMAP_FIRST_WORD_MASK(start);
 149
 150         while (len - bits_to_set >= 0) {
 151                 *p |= mask_to_set;
 152                 len -= bits_to_set;
 153                 bits_to_set = BITS_PER_WORD;
 154                 mask_to_set = ~0UL;
 155                 p++;
 156         }
 157         if (len) {
 158                 mask_to_set &= CCP_BITMAP_LAST_WORD_MASK(size);
 159                 *p |= mask_to_set;
 160         }
 161 }
 162
 163 static void
 164 ccp_bitmap_clear(unsigned long *map, unsigned int start, int len)
 165 {
 166         unsigned long *p = map + WORD_OFFSET(start);
 167         const unsigned int size = start + len;
 168         int bits_to_clear = BITS_PER_WORD - (start % BITS_PER_WORD);
 169         unsigned long mask_to_clear = CCP_BITMAP_FIRST_WORD_MASK(start);
 170
 171         while (len - bits_to_clear >= 0) {
 172                 *p &= ~mask_to_clear;
 173                 len -= bits_to_clear;
 174                 bits_to_clear = BITS_PER_WORD;
 175                 mask_to_clear = ~0UL;
 176                 p++;
 177         }
 178         if (len) {
 179                 mask_to_clear &= CCP_BITMAP_LAST_WORD_MASK(size);
 180                 *p &= ~mask_to_clear;
 181         }
 182 }
 183
 184
 185 static unsigned long
 186 _ccp_find_next_bit(const unsigned long *addr,
 187                    unsigned long nbits,
 188                    unsigned long start,
 189                    unsigned long invert)
 190 {
 191         unsigned long tmp;
 192
 193         if (!nbits || start >= nbits)
 194                 return nbits;
 195
 196         tmp = addr[start / BITS_PER_WORD] ^ invert;
 197
 198         /* Handle 1st word. */
 199         tmp &= CCP_BITMAP_FIRST_WORD_MASK(start);
 200         start = ccp_round_down(start, BITS_PER_WORD);
 201
 202         while (!tmp) {
 203                 start += BITS_PER_WORD;
 204                 if (start >= nbits)
 205                         return nbits;
 206
 207                 tmp = addr[start / BITS_PER_WORD] ^ invert;
 208         }
 209
 210         return RTE_MIN(start + (ffs(tmp) - 1), nbits);
 211 }
 212
 213 static unsigned long
 214 ccp_find_next_bit(const unsigned long *addr,
 215                   unsigned long size,
 216                   unsigned long offset)
 217 {
 218         return _ccp_find_next_bit(addr, size, offset, 0UL);
 219 }
 220
 221 static unsigned long
 222 ccp_find_next_zero_bit(const unsigned long *addr,
 223                        unsigned long size,
 224                        unsigned long offset)
 225 {
 226         return _ccp_find_next_bit(addr, size, offset, ~0UL);
 227 }
 228
 229 /**
 230  * bitmap_find_next_zero_area - find a contiguous aligned zero area
 231  * @map: The address to base the search on
 232  * @size: The bitmap size in bits
 233  * @start: The bitnumber to start searching at
 234  * @nr: The number of zeroed bits we're looking for
 235  */
 236 static unsigned long
 237 ccp_bitmap_find_next_zero_area(unsigned long *map,
 238                                unsigned long size,
 239                                unsigned long start,
 240                                unsigned int nr)
 241 {
 242         unsigned long index, end, i;
 243
 244 again:
 245         index = ccp_find_next_zero_bit(map, size, start);
 246
 247         end = index + nr;
 248         if (end > size)
 249                 return end;
 250         i = ccp_find_next_bit(map, end, index);
 251         if (i < end) {
 252                 start = i + 1;
 253                 goto again;
 254         }
 255         return index;
 256 }
 257
 258 static uint32_t
 259 ccp_lsb_alloc(struct ccp_queue *cmd_q, unsigned int count)
 260 {
 261         struct ccp_device *ccp;
 262         int start;
 263
 264         /* First look at the map for the queue */
 265         if (cmd_q->lsb >= 0) {
 266                 start = (uint32_t)ccp_bitmap_find_next_zero_area(cmd_q->lsbmap,
 267                                                                  LSB_SIZE, 0,
 268                                                                  count);
 269                 if (start < LSB_SIZE) {
 270                         ccp_bitmap_set(cmd_q->lsbmap, start, count);
 271                         return start + cmd_q->lsb * LSB_SIZE;
 272                 }
 273         }
 274
 275         /* try to get an entry from the shared blocks */
 276         ccp = cmd_q->dev;
 277
 278         rte_spinlock_lock(&ccp->lsb_lock);
 279
 280         start = (uint32_t)ccp_bitmap_find_next_zero_area(ccp->lsbmap,
 281                                                     MAX_LSB_CNT * LSB_SIZE,
 282                                                     0, count);
 283         if (start <= MAX_LSB_CNT * LSB_SIZE) {
 284                 ccp_bitmap_set(ccp->lsbmap, start, count);
 285                 rte_spinlock_unlock(&ccp->lsb_lock);
 286                 return start * LSB_ITEM_SIZE;
 287         }
 288         CCP_LOG_ERR("NO LSBs available");
 289
 290         rte_spinlock_unlock(&ccp->lsb_lock);
 291
 292         return 0;
 293 }
 294
 295 static void __rte_unused
 296 ccp_lsb_free(struct ccp_queue *cmd_q,
 297              unsigned int start,
 298              unsigned int count)
 299 {
 300         int lsbno = start / LSB_SIZE;
 301
 302         if (!start)
 303                 return;
 304
 305         if (cmd_q->lsb == lsbno) {
 306                 /* An entry from the private LSB */
 307                 ccp_bitmap_clear(cmd_q->lsbmap, start % LSB_SIZE, count);
 308         } else {
 309                 /* From the shared LSBs */
 310                 struct ccp_device *ccp = cmd_q->dev;
 311
 312                 rte_spinlock_lock(&ccp->lsb_lock);
 313                 ccp_bitmap_clear(ccp->lsbmap, start, count);
 314                 rte_spinlock_unlock(&ccp->lsb_lock);
 315         }
 316 }
 317
 318 static int
 319 ccp_find_lsb_regions(struct ccp_queue *cmd_q, uint64_t status)
 320 {
 321         int q_mask = 1 << cmd_q->id;
 322         int weight = 0;
 323         int j;
 324
 325         /* Build a bit mask to know which LSBs
 326          * this queue has access to.
 327          * Don't bother with segment 0
 328          * as it has special
 329          * privileges.
 330          */
 331         cmd_q->lsbmask = 0;
 332         status >>= LSB_REGION_WIDTH;
 333         for (j = 1; j < MAX_LSB_CNT; j++) {
 334                 if (status & q_mask)
 335                         ccp_set_bit(&cmd_q->lsbmask, j);
 336
 337                 status >>= LSB_REGION_WIDTH;
 338         }
 339
 340         for (j = 0; j < MAX_LSB_CNT; j++)
 341                 if (ccp_get_bit(&cmd_q->lsbmask, j))
 342                         weight++;
 343
 344         printf("Queue %d can access %d LSB regions  of mask  %lu\n",
 345                (int)cmd_q->id, weight, cmd_q->lsbmask);
 346
 347         return weight ? 0 : -EINVAL;
 348 }
 349
 350 static int
 351 ccp_find_and_assign_lsb_to_q(struct ccp_device *ccp,
 352                              int lsb_cnt, int n_lsbs,
 353                              unsigned long *lsb_pub)
 354 {
 355         unsigned long qlsb = 0;
 356         int bitno = 0;
 357         int qlsb_wgt = 0;
 358         int i, j;
 359
 360         /* For each queue:
 361          * If the count of potential LSBs available to a queue matches the
 362          * ordinal given to us in lsb_cnt:
 363          * Copy the mask of possible LSBs for this queue into "qlsb";
 364          * For each bit in qlsb, see if the corresponding bit in the
 365          * aggregation mask is set; if so, we have a match.
 366          *     If we have a match, clear the bit in the aggregation to
 367          *     mark it as no longer available.
 368          *     If there is no match, clear the bit in qlsb and keep looking.
 369          */
 370         for (i = 0; i < ccp->cmd_q_count; i++) {
 371                 struct ccp_queue *cmd_q = &ccp->cmd_q[i];
 372
 373                 qlsb_wgt = 0;
 374                 for (j = 0; j < MAX_LSB_CNT; j++)
 375                         if (ccp_get_bit(&cmd_q->lsbmask, j))
 376                                 qlsb_wgt++;
 377
 378                 if (qlsb_wgt == lsb_cnt) {
 379                         qlsb = cmd_q->lsbmask;
 380
 381                         bitno = ffs(qlsb) - 1;
 382                         while (bitno < MAX_LSB_CNT) {
 383                                 if (ccp_get_bit(lsb_pub, bitno)) {
 384                                         /* We found an available LSB
 385                                          * that this queue can access
 386                                          */
 387                                         cmd_q->lsb = bitno;
 388                                         ccp_clear_bit(lsb_pub, bitno);
 389                                         break;
 390                                 }
 391                                 ccp_clear_bit(&qlsb, bitno);
 392                                 bitno = ffs(qlsb) - 1;
 393                         }
 394                         if (bitno >= MAX_LSB_CNT)
 395                                 return -EINVAL;
 396                         n_lsbs--;
 397                 }
 398         }
 399         return n_lsbs;
 400 }
 401
 402 /* For each queue, from the most- to least-constrained:
 403  * find an LSB that can be assigned to the queue. If there are N queues that
 404  * can only use M LSBs, where N > M, fail; otherwise, every queue will get a
 405  * dedicated LSB. Remaining LSB regions become a shared resource.
 406  * If we have fewer LSBs than queues, all LSB regions become shared
 407  * resources.
 408  */
 409 static int
 410 ccp_assign_lsbs(struct ccp_device *ccp)
 411 {
 412         unsigned long lsb_pub = 0, qlsb = 0;
 413         int n_lsbs = 0;
 414         int bitno;
 415         int i, lsb_cnt;
 416         int rc = 0;
 417
 418         rte_spinlock_init(&ccp->lsb_lock);
 419
 420         /* Create an aggregate bitmap to get a total count of available LSBs */
 421         for (i = 0; i < ccp->cmd_q_count; i++)
 422                 lsb_pub |= ccp->cmd_q[i].lsbmask;
 423
 424         for (i = 0; i < MAX_LSB_CNT; i++)
 425                 if (ccp_get_bit(&lsb_pub, i))
 426                         n_lsbs++;
 427
 428         if (n_lsbs >= ccp->cmd_q_count) {
 429                 /* We have enough LSBS to give every queue a private LSB.
 430                  * Brute force search to start with the queues that are more
 431                  * constrained in LSB choice. When an LSB is privately
 432                  * assigned, it is removed from the public mask.
 433                  * This is an ugly N squared algorithm with some optimization.
 434                  */
 435                 for (lsb_cnt = 1; n_lsbs && (lsb_cnt <= MAX_LSB_CNT);
 436                      lsb_cnt++) {
 437                         rc = ccp_find_and_assign_lsb_to_q(ccp, lsb_cnt, n_lsbs,
 438                                                           &lsb_pub);
 439                         if (rc < 0)
 440                                 return -EINVAL;
 441                         n_lsbs = rc;
 442                 }
 443         }
 444
 445         rc = 0;
 446         /* What's left of the LSBs, according to the public mask, now become
 447          * shared. Any zero bits in the lsb_pub mask represent an LSB region
 448          * that can't be used as a shared resource, so mark the LSB slots for
 449          * them as "in use".
 450          */
 451         qlsb = lsb_pub;
 452         bitno = ccp_find_first_zero_bit(&qlsb, MAX_LSB_CNT);
 453         while (bitno < MAX_LSB_CNT) {
 454                 ccp_bitmap_set(ccp->lsbmap, bitno * LSB_SIZE, LSB_SIZE);
 455                 ccp_set_bit(&qlsb, bitno);
 456                 bitno = ccp_find_first_zero_bit(&qlsb, MAX_LSB_CNT);
 457         }
 458
 459         return rc;
 460 }
 461
 462 static int
 463 ccp_add_device(struct ccp_device *dev, int type)
 464 {
 465         int i;
 466         uint32_t qmr, status_lo, status_hi, dma_addr_lo, dma_addr_hi;
 467         uint64_t status;
 468         struct ccp_queue *cmd_q;
 469         const struct rte_memzone *q_mz;
 470         void *vaddr;
 471
 472         if (dev == NULL)
 473                 return -1;
 474
 475         dev->id = ccp_dev_id++;
 476         dev->qidx = 0;
 477         vaddr = (void *)(dev->pci.mem_resource[2].addr);
 478
 479         if (type == CCP_VERSION_5B) {
 480                 CCP_WRITE_REG(vaddr, CMD_TRNG_CTL_OFFSET, 0x00012D57);
 481                 CCP_WRITE_REG(vaddr, CMD_CONFIG_0_OFFSET, 0x00000003);
 482                 for (i = 0; i < 12; i++) {
 483                         CCP_WRITE_REG(vaddr, CMD_AES_MASK_OFFSET,
 484                                       CCP_READ_REG(vaddr, TRNG_OUT_REG));
 485                 }
 486                 CCP_WRITE_REG(vaddr, CMD_QUEUE_MASK_OFFSET, 0x0000001F);
 487                 CCP_WRITE_REG(vaddr, CMD_QUEUE_PRIO_OFFSET, 0x00005B6D);
 488                 CCP_WRITE_REG(vaddr, CMD_CMD_TIMEOUT_OFFSET, 0x00000000);
 489
 490                 CCP_WRITE_REG(vaddr, LSB_PRIVATE_MASK_LO_OFFSET, 0x3FFFFFFF);
 491                 CCP_WRITE_REG(vaddr, LSB_PRIVATE_MASK_HI_OFFSET, 0x000003FF);
 492
 493                 CCP_WRITE_REG(vaddr, CMD_CLK_GATE_CTL_OFFSET, 0x00108823);
 494         }
 495         CCP_WRITE_REG(vaddr, CMD_REQID_CONFIG_OFFSET, 0x00001249);
 496
 497         /* Copy the private LSB mask to the public registers */
 498         status_lo = CCP_READ_REG(vaddr, LSB_PRIVATE_MASK_LO_OFFSET);
 499         status_hi = CCP_READ_REG(vaddr, LSB_PRIVATE_MASK_HI_OFFSET);
 500         CCP_WRITE_REG(vaddr, LSB_PUBLIC_MASK_LO_OFFSET, status_lo);
 501         CCP_WRITE_REG(vaddr, LSB_PUBLIC_MASK_HI_OFFSET, status_hi);
 502         status = ((uint64_t)status_hi<<30) | ((uint64_t)status_lo);
 503
 504         dev->cmd_q_count = 0;
 505         /* Find available queues */
 506         qmr = CCP_READ_REG(vaddr, Q_MASK_REG);
 507         for (i = 0; i < MAX_HW_QUEUES; i++) {
 508                 if (!(qmr & (1 << i)))
 509                         continue;
 510                 cmd_q = &dev->cmd_q[dev->cmd_q_count++];
 511                 cmd_q->dev = dev;
 512                 cmd_q->id = i;
 513                 cmd_q->qidx = 0;
 514                 cmd_q->qsize = Q_SIZE(Q_DESC_SIZE);
 515
 516                 cmd_q->reg_base = (uint8_t *)vaddr +
 517                         CMD_Q_STATUS_INCR * (i + 1);
 518
 519                 /* CCP queue memory */
 520                 snprintf(cmd_q->memz_name, sizeof(cmd_q->memz_name),
 521                          "%s_%d_%s_%d_%s",
 522                          "ccp_dev",
 523                          (int)dev->id, "queue",
 524                          (int)cmd_q->id, "mem");
 525                 q_mz = ccp_queue_dma_zone_reserve(cmd_q->memz_name,
 526                                                   cmd_q->qsize, SOCKET_ID_ANY);
 527                 cmd_q->qbase_addr = (void *)q_mz->addr;
 528                 cmd_q->qbase_desc = (void *)q_mz->addr;
 529                 cmd_q->qbase_phys_addr =  q_mz->phys_addr;
 530
 531                 cmd_q->qcontrol = 0;
 532                 /* init control reg to zero */
 533                 CCP_WRITE_REG(cmd_q->reg_base, CMD_Q_CONTROL_BASE,
 534                               cmd_q->qcontrol);
 535
 536                 /* Disable the interrupts */
 537                 CCP_WRITE_REG(cmd_q->reg_base, CMD_Q_INT_ENABLE_BASE, 0x00);
 538                 CCP_READ_REG(cmd_q->reg_base, CMD_Q_INT_STATUS_BASE);
 539                 CCP_READ_REG(cmd_q->reg_base, CMD_Q_STATUS_BASE);
 540
 541                 /* Clear the interrupts */
 542                 CCP_WRITE_REG(cmd_q->reg_base, CMD_Q_INTERRUPT_STATUS_BASE,
 543                               ALL_INTERRUPTS);
 544
 545                 /* Configure size of each virtual queue accessible to host */
 546                 cmd_q->qcontrol &= ~(CMD_Q_SIZE << CMD_Q_SHIFT);
 547                 cmd_q->qcontrol |= QUEUE_SIZE_VAL << CMD_Q_SHIFT;
 548
 549                 dma_addr_lo = low32_value(cmd_q->qbase_phys_addr);
 550                 CCP_WRITE_REG(cmd_q->reg_base, CMD_Q_TAIL_LO_BASE,
 551                               (uint32_t)dma_addr_lo);
 552                 CCP_WRITE_REG(cmd_q->reg_base, CMD_Q_HEAD_LO_BASE,
 553                               (uint32_t)dma_addr_lo);
 554
 555                 dma_addr_hi = high32_value(cmd_q->qbase_phys_addr);
 556                 cmd_q->qcontrol |= (dma_addr_hi << 16);
 557                 CCP_WRITE_REG(cmd_q->reg_base, CMD_Q_CONTROL_BASE,
 558                               cmd_q->qcontrol);
 559
 560                 /* create LSB Mask map */
 561                 if (ccp_find_lsb_regions(cmd_q, status))
 562                         CCP_LOG_ERR("queue doesn't have lsb regions");
 563                 cmd_q->lsb = -1;
 564
 565                 rte_atomic64_init(&cmd_q->free_slots);
 566                 rte_atomic64_set(&cmd_q->free_slots, (COMMANDS_PER_QUEUE - 1));
 567                 /* unused slot barrier b/w H&T */
 568         }
 569
 570         if (ccp_assign_lsbs(dev))
 571                 CCP_LOG_ERR("Unable to assign lsb region");
 572
 573         /* pre-allocate LSB slots */
 574         for (i = 0; i < dev->cmd_q_count; i++) {
 575                 dev->cmd_q[i].sb_key =
 576                         ccp_lsb_alloc(&dev->cmd_q[i], 1);
 577                 dev->cmd_q[i].sb_iv =
 578                         ccp_lsb_alloc(&dev->cmd_q[i], 1);
 579                 dev->cmd_q[i].sb_sha =
 580                         ccp_lsb_alloc(&dev->cmd_q[i], 2);
 581                 dev->cmd_q[i].sb_hmac =
 582                         ccp_lsb_alloc(&dev->cmd_q[i], 2);
 583         }
 584
 585         TAILQ_INSERT_TAIL(&ccp_list, dev, next);
 586         return 0;
 587 }
 588
 589 static void
 590 ccp_remove_device(struct ccp_device *dev)
 591 {
 592         if (dev == NULL)
 593                 return;
 594
 595         TAILQ_REMOVE(&ccp_list, dev, next);
 596 }
 597
 598 static int
 599 is_ccp_device(const char *dirname,
 600               const struct rte_pci_id *ccp_id,
 601               int *type)
 602 {
 603         char filename[PATH_MAX];
 604         const struct rte_pci_id *id;
 605         uint16_t vendor, device_id;
 606         int i;
 607         unsigned long tmp;
 608
 609         /* get vendor id */
 610         snprintf(filename, sizeof(filename), "%s/vendor", dirname);
 611         if (ccp_pci_parse_sysfs_value(filename, &tmp) < 0)
 612                 return 0;
 613         vendor = (uint16_t)tmp;
 614
 615         /* get device id */
 616         snprintf(filename, sizeof(filename), "%s/device", dirname);
 617         if (ccp_pci_parse_sysfs_value(filename, &tmp) < 0)
 618                 return 0;
 619         device_id = (uint16_t)tmp;
 620
 621         for (id = ccp_id, i = 0; id->vendor_id != 0; id++, i++) {
 622                 if (vendor == id->vendor_id &&
 623                     device_id == id->device_id) {
 624                         *type = i;
 625                         return 1; /* Matched device */
 626                 }
 627         }
 628         return 0;
 629 }
 630
 631 static int
 632 ccp_probe_device(const char *dirname, uint16_t domain,
 633                  uint8_t bus, uint8_t devid,
 634                  uint8_t function, int ccp_type)
 635 {
 636         struct ccp_device *ccp_dev = NULL;
 637         struct rte_pci_device *pci;
 638         char filename[PATH_MAX];
 639         unsigned long tmp;
 640         int uio_fd = -1, i, uio_num;
 641         char uio_devname[PATH_MAX];
 642         void *map_addr;
 643
 644         ccp_dev = rte_zmalloc("ccp_device", sizeof(*ccp_dev),
 645                               RTE_CACHE_LINE_SIZE);
 646         if (ccp_dev == NULL)
 647                 goto fail;
 648         pci = &(ccp_dev->pci);
 649
 650         pci->addr.domain = domain;
 651         pci->addr.bus = bus;
 652         pci->addr.devid = devid;
 653         pci->addr.function = function;
 654
 655         /* get vendor id */
 656         snprintf(filename, sizeof(filename), "%s/vendor", dirname);
 657         if (ccp_pci_parse_sysfs_value(filename, &tmp) < 0)
 658                 goto fail;
 659         pci->id.vendor_id = (uint16_t)tmp;
 660
 661         /* get device id */
 662         snprintf(filename, sizeof(filename), "%s/device", dirname);
 663         if (ccp_pci_parse_sysfs_value(filename, &tmp) < 0)
 664                 goto fail;
 665         pci->id.device_id = (uint16_t)tmp;
 666
 667         /* get subsystem_vendor id */
 668         snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
 669                         dirname);
 670         if (ccp_pci_parse_sysfs_value(filename, &tmp) < 0)
 671                 goto fail;
 672         pci->id.subsystem_vendor_id = (uint16_t)tmp;
 673
 674         /* get subsystem_device id */
 675         snprintf(filename, sizeof(filename), "%s/subsystem_device",
 676                         dirname);
 677         if (ccp_pci_parse_sysfs_value(filename, &tmp) < 0)
 678                 goto fail;
 679         pci->id.subsystem_device_id = (uint16_t)tmp;
 680
 681         /* get class_id */
 682         snprintf(filename, sizeof(filename), "%s/class",
 683                         dirname);
 684         if (ccp_pci_parse_sysfs_value(filename, &tmp) < 0)
 685                 goto fail;
 686         /* the least 24 bits are valid: class, subclass, program interface */
 687         pci->id.class_id = (uint32_t)tmp & RTE_CLASS_ANY_ID;
 688
 689         /* parse resources */
 690         snprintf(filename, sizeof(filename), "%s/resource", dirname);
 691         if (ccp_pci_parse_sysfs_resource(filename, pci) < 0)
 692                 goto fail;
 693
 694         uio_num = ccp_find_uio_devname(dirname);
 695         if (uio_num < 0) {
 696                 /*
 697                  * It may take time for uio device to appear,
 698                  * wait  here and try again
 699                  */
 700                 usleep(100000);
 701                 uio_num = ccp_find_uio_devname(dirname);
 702                 if (uio_num < 0)
 703                         goto fail;
 704         }
 705         snprintf(uio_devname, sizeof(uio_devname), "/dev/uio%u", uio_num);
 706
 707         uio_fd = open(uio_devname, O_RDWR | O_NONBLOCK);
 708         if (uio_fd < 0)
 709                 goto fail;
 710         if (flock(uio_fd, LOCK_EX | LOCK_NB))
 711                 goto fail;
 712
 713         /* Map the PCI memory resource of device */
 714         for (i = 0; i < PCI_MAX_RESOURCE; i++) {
 715
 716                 char devname[PATH_MAX];
 717                 int res_fd;
 718
 719                 if (pci->mem_resource[i].phys_addr == 0)
 720                         continue;
 721                 snprintf(devname, sizeof(devname), "%s/resource%d", dirname, i);
 722                 res_fd = open(devname, O_RDWR);
 723                 if (res_fd < 0)
 724                         goto fail;
 725                 map_addr = mmap(NULL, pci->mem_resource[i].len,
 726                                 PROT_READ | PROT_WRITE,
 727                                 MAP_SHARED, res_fd, 0);
 728                 if (map_addr == MAP_FAILED)
 729                         goto fail;
 730
 731                 pci->mem_resource[i].addr = map_addr;
 732         }
 733
 734         /* device is valid, add in list */
 735         if (ccp_add_device(ccp_dev, ccp_type)) {
 736                 ccp_remove_device(ccp_dev);
 737                 goto fail;
 738         }
 739
 740         return 0;
 741 fail:
 742         CCP_LOG_ERR("CCP Device probe failed");
 743         if (uio_fd > 0)
 744                 close(uio_fd);
 745         if (ccp_dev)
 746                 rte_free(ccp_dev);
 747         return -1;
 748 }
 749
 750 int
 751 ccp_probe_devices(const struct rte_pci_id *ccp_id)
 752 {
 753         int dev_cnt = 0;
 754         int ccp_type = 0;
 755         struct dirent *d;
 756         DIR *dir;
 757         int ret = 0;
 758         int module_idx = 0;
 759         uint16_t domain;
 760         uint8_t bus, devid, function;
 761         char dirname[PATH_MAX];
 762
 763         module_idx = ccp_check_pci_uio_module();
 764         if (module_idx < 0)
 765                 return -1;
 766
 767         TAILQ_INIT(&ccp_list);
 768         dir = opendir(SYSFS_PCI_DEVICES);
 769         if (dir == NULL)
 770                 return -1;
 771         while ((d = readdir(dir)) != NULL) {
 772                 if (d->d_name[0] == '.')
 773                         continue;
 774                 if (ccp_parse_pci_addr_format(d->d_name, sizeof(d->d_name),
 775                                         &domain, &bus, &devid, &function) != 0)
 776                         continue;
 777                 snprintf(dirname, sizeof(dirname), "%s/%s",
 778                              SYSFS_PCI_DEVICES, d->d_name);
 779                 if (is_ccp_device(dirname, ccp_id, &ccp_type)) {
 780                         printf("CCP : Detected CCP device with ID = 0x%x\n",
 781                                ccp_id[ccp_type].device_id);
 782                         ret = ccp_probe_device(dirname, domain, bus, devid,
 783                                                function, ccp_type);
 784                         if (ret == 0)
 785                                 dev_cnt++;
 786                 }
 787         }
 788         closedir(dir);
 789         return dev_cnt;
 790 }