drivers/dma/hisilicon/hisi_dmadev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(C) 2021 HiSilicon Limited
   3  */
   4
   5 #include <inttypes.h>
   6 #include <string.h>
   7
   8 #include <rte_bus_pci.h>
   9 #include <rte_cycles.h>
  10 #include <rte_eal.h>
  11 #include <rte_io.h>
  12 #include <rte_log.h>
  13 #include <rte_malloc.h>
  14 #include <rte_memzone.h>
  15 #include <rte_pci.h>
  16 #include <rte_dmadev_pmd.h>
  17
  18 #include "hisi_dmadev.h"
  19
  20 RTE_LOG_REGISTER_DEFAULT(hisi_dma_logtype, INFO);
  21 #define HISI_DMA_LOG(level, fmt, args...) \
  22                 rte_log(RTE_LOG_ ## level, hisi_dma_logtype, \
  23                 "%s(): " fmt "\n", __func__, ##args)
  24 #define HISI_DMA_LOG_RAW(hw, level, fmt, args...) \
  25                 rte_log(RTE_LOG_ ## level, hisi_dma_logtype, \
  26                 "%s %s(): " fmt "\n", (hw)->data->dev_name, \
  27                 __func__, ##args)
  28 #define HISI_DMA_DEBUG(hw, fmt, args...) \
  29                 HISI_DMA_LOG_RAW(hw, DEBUG, fmt, ## args)
  30 #define HISI_DMA_INFO(hw, fmt, args...) \
  31                 HISI_DMA_LOG_RAW(hw, INFO, fmt, ## args)
  32 #define HISI_DMA_WARN(hw, fmt, args...) \
  33                 HISI_DMA_LOG_RAW(hw, WARNING, fmt, ## args)
  34 #define HISI_DMA_ERR(hw, fmt, args...) \
  35                 HISI_DMA_LOG_RAW(hw, ERR, fmt, ## args)
  36
  37 static uint32_t
  38 hisi_dma_queue_base(struct hisi_dma_dev *hw)
  39 {
  40         if (hw->reg_layout == HISI_DMA_REG_LAYOUT_HIP08)
  41                 return HISI_DMA_HIP08_QUEUE_BASE;
  42         else
  43                 return 0;
  44 }
  45
  46 static volatile void *
  47 hisi_dma_queue_regaddr(struct hisi_dma_dev *hw, uint32_t qoff)
  48 {
  49         uint32_t off = hisi_dma_queue_base(hw) +
  50                         hw->queue_id * HISI_DMA_QUEUE_REGION_SIZE + qoff;
  51         return (volatile void *)((char *)hw->io_base + off);
  52 }
  53
  54 static void
  55 hisi_dma_write_reg(void *base, uint32_t off, uint32_t val)
  56 {
  57         rte_write32(rte_cpu_to_le_32(val),
  58                     (volatile void *)((char *)base + off));
  59 }
  60
  61 static void
  62 hisi_dma_write_dev(struct hisi_dma_dev *hw, uint32_t off, uint32_t val)
  63 {
  64         hisi_dma_write_reg(hw->io_base, off, val);
  65 }
  66
  67 static void
  68 hisi_dma_write_queue(struct hisi_dma_dev *hw, uint32_t qoff, uint32_t val)
  69 {
  70         uint32_t off = hisi_dma_queue_base(hw) +
  71                         hw->queue_id * HISI_DMA_QUEUE_REGION_SIZE + qoff;
  72         hisi_dma_write_dev(hw, off, val);
  73 }
  74
  75 static uint32_t
  76 hisi_dma_read_reg(void *base, uint32_t off)
  77 {
  78         uint32_t val = rte_read32((volatile void *)((char *)base + off));
  79         return rte_le_to_cpu_32(val);
  80 }
  81
  82 static uint32_t
  83 hisi_dma_read_dev(struct hisi_dma_dev *hw, uint32_t off)
  84 {
  85         return hisi_dma_read_reg(hw->io_base, off);
  86 }
  87
  88 static uint32_t
  89 hisi_dma_read_queue(struct hisi_dma_dev *hw, uint32_t qoff)
  90 {
  91         uint32_t off = hisi_dma_queue_base(hw) +
  92                         hw->queue_id * HISI_DMA_QUEUE_REGION_SIZE + qoff;
  93         return hisi_dma_read_dev(hw, off);
  94 }
  95
  96 static void
  97 hisi_dma_update_bit(struct hisi_dma_dev *hw, uint32_t off, uint32_t pos,
  98                     bool set)
  99 {
 100         uint32_t tmp = hisi_dma_read_dev(hw, off);
 101         uint32_t mask = 1u << pos;
 102         tmp = set ? tmp | mask : tmp & ~mask;
 103         hisi_dma_write_dev(hw, off, tmp);
 104 }
 105
 106 static void
 107 hisi_dma_update_queue_bit(struct hisi_dma_dev *hw, uint32_t qoff, uint32_t pos,
 108                           bool set)
 109 {
 110         uint32_t tmp = hisi_dma_read_queue(hw, qoff);
 111         uint32_t mask = 1u << pos;
 112         tmp = set ? tmp | mask : tmp & ~mask;
 113         hisi_dma_write_queue(hw, qoff, tmp);
 114 }
 115
 116 static void
 117 hisi_dma_update_queue_mbit(struct hisi_dma_dev *hw, uint32_t qoff,
 118                            uint32_t mask, bool set)
 119 {
 120         uint32_t tmp = hisi_dma_read_queue(hw, qoff);
 121         tmp = set ? tmp | mask : tmp & ~mask;
 122         hisi_dma_write_queue(hw, qoff, tmp);
 123 }
 124
 125 #define hisi_dma_poll_hw_state(hw, val, cond, sleep_us, timeout_us) ({ \
 126         uint32_t timeout = 0; \
 127         while (timeout++ <= (timeout_us)) { \
 128                 (val) = hisi_dma_read_queue(hw, HISI_DMA_QUEUE_FSM_REG); \
 129                 if (cond) \
 130                         break; \
 131                 rte_delay_us(sleep_us); \
 132         } \
 133         (cond) ? 0 : -ETIME; \
 134 })
 135
 136 static int
 137 hisi_dma_reset_hw(struct hisi_dma_dev *hw)
 138 {
 139 #define POLL_SLEEP_US   100
 140 #define POLL_TIMEOUT_US 10000
 141
 142         uint32_t tmp;
 143         int ret;
 144
 145         hisi_dma_update_queue_bit(hw, HISI_DMA_QUEUE_CTRL0_REG,
 146                                   HISI_DMA_QUEUE_CTRL0_PAUSE_B, true);
 147         hisi_dma_update_queue_bit(hw, HISI_DMA_QUEUE_CTRL0_REG,
 148                                   HISI_DMA_QUEUE_CTRL0_EN_B, false);
 149
 150         ret = hisi_dma_poll_hw_state(hw, tmp,
 151                 FIELD_GET(HISI_DMA_QUEUE_FSM_STS_M, tmp) != HISI_DMA_STATE_RUN,
 152                 POLL_SLEEP_US, POLL_TIMEOUT_US);
 153         if (ret) {
 154                 HISI_DMA_ERR(hw, "disable dma timeout!");
 155                 return ret;
 156         }
 157
 158         hisi_dma_update_queue_bit(hw, HISI_DMA_QUEUE_CTRL1_REG,
 159                                   HISI_DMA_QUEUE_CTRL1_RESET_B, true);
 160         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_SQ_TAIL_REG, 0);
 161         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_CQ_HEAD_REG, 0);
 162         hisi_dma_update_queue_bit(hw, HISI_DMA_QUEUE_CTRL0_REG,
 163                                   HISI_DMA_QUEUE_CTRL0_PAUSE_B, false);
 164
 165         ret = hisi_dma_poll_hw_state(hw, tmp,
 166                 FIELD_GET(HISI_DMA_QUEUE_FSM_STS_M, tmp) == HISI_DMA_STATE_IDLE,
 167                 POLL_SLEEP_US, POLL_TIMEOUT_US);
 168         if (ret) {
 169                 HISI_DMA_ERR(hw, "reset dma timeout!");
 170                 return ret;
 171         }
 172
 173         return 0;
 174 }
 175
 176 static void
 177 hisi_dma_init_hw(struct hisi_dma_dev *hw)
 178 {
 179         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_SQ_BASE_L_REG,
 180                              lower_32_bits(hw->sqe_iova));
 181         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_SQ_BASE_H_REG,
 182                              upper_32_bits(hw->sqe_iova));
 183         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_CQ_BASE_L_REG,
 184                              lower_32_bits(hw->cqe_iova));
 185         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_CQ_BASE_H_REG,
 186                              upper_32_bits(hw->cqe_iova));
 187         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_SQ_DEPTH_REG,
 188                              hw->sq_depth_mask);
 189         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_CQ_DEPTH_REG, hw->cq_depth - 1);
 190         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_SQ_TAIL_REG, 0);
 191         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_CQ_HEAD_REG, 0);
 192         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_ERR_INT_NUM0_REG, 0);
 193         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_ERR_INT_NUM1_REG, 0);
 194         hisi_dma_write_queue(hw, HISI_DMA_QUEUE_ERR_INT_NUM2_REG, 0);
 195
 196         if (hw->reg_layout == HISI_DMA_REG_LAYOUT_HIP08) {
 197                 hisi_dma_write_queue(hw, HISI_DMA_HIP08_QUEUE_ERR_INT_NUM3_REG,
 198                                      0);
 199                 hisi_dma_write_queue(hw, HISI_DMA_HIP08_QUEUE_ERR_INT_NUM4_REG,
 200                                      0);
 201                 hisi_dma_write_queue(hw, HISI_DMA_HIP08_QUEUE_ERR_INT_NUM5_REG,
 202                                      0);
 203                 hisi_dma_write_queue(hw, HISI_DMA_HIP08_QUEUE_ERR_INT_NUM6_REG,
 204                                      0);
 205                 hisi_dma_update_queue_bit(hw, HISI_DMA_QUEUE_CTRL0_REG,
 206                                 HISI_DMA_HIP08_QUEUE_CTRL0_ERR_ABORT_B, false);
 207                 hisi_dma_update_queue_mbit(hw, HISI_DMA_QUEUE_INT_STATUS_REG,
 208                                 HISI_DMA_HIP08_QUEUE_INT_MASK_M, true);
 209                 hisi_dma_update_queue_mbit(hw,
 210                                 HISI_DMA_HIP08_QUEUE_INT_MASK_REG,
 211                                 HISI_DMA_HIP08_QUEUE_INT_MASK_M, true);
 212         }
 213 }
 214
 215 static void
 216 hisi_dma_init_gbl(void *pci_bar, uint8_t revision)
 217 {
 218         struct hisi_dma_dev hw;
 219
 220         memset(&hw, 0, sizeof(hw));
 221         hw.io_base = pci_bar;
 222
 223         if (revision == HISI_DMA_REVISION_HIP08B)
 224                 hisi_dma_update_bit(&hw, HISI_DMA_HIP08_MODE_REG,
 225                                     HISI_DMA_HIP08_MODE_SEL_B, true);
 226 }
 227
 228 static uint8_t
 229 hisi_dma_reg_layout(uint8_t revision)
 230 {
 231         if (revision == HISI_DMA_REVISION_HIP08B)
 232                 return HISI_DMA_REG_LAYOUT_HIP08;
 233         else
 234                 return HISI_DMA_REG_LAYOUT_INVALID;
 235 }
 236
 237 static void
 238 hisi_dma_zero_iomem(struct hisi_dma_dev *hw)
 239 {
 240         memset(hw->iomz->addr, 0, hw->iomz_sz);
 241 }
 242
 243 static int
 244 hisi_dma_alloc_iomem(struct hisi_dma_dev *hw, uint16_t ring_size,
 245                      const char *dev_name)
 246 {
 247         uint32_t sq_size = sizeof(struct hisi_dma_sqe) * ring_size;
 248         uint32_t cq_size = sizeof(struct hisi_dma_cqe) *
 249                            (ring_size + HISI_DMA_CQ_RESERVED);
 250         uint32_t status_size = sizeof(uint16_t) * ring_size;
 251         char mz_name[RTE_MEMZONE_NAMESIZE];
 252         const struct rte_memzone *iomz;
 253         uint32_t total_size;
 254
 255         sq_size = RTE_CACHE_LINE_ROUNDUP(sq_size);
 256         cq_size = RTE_CACHE_LINE_ROUNDUP(cq_size);
 257         status_size = RTE_CACHE_LINE_ROUNDUP(status_size);
 258         total_size = sq_size + cq_size + status_size;
 259
 260         (void)snprintf(mz_name, sizeof(mz_name), "hisi_dma:%s", dev_name);
 261         iomz = rte_memzone_reserve(mz_name, total_size, hw->data->numa_node,
 262                                    RTE_MEMZONE_IOVA_CONTIG);
 263         if (iomz == NULL) {
 264                 HISI_DMA_ERR(hw, "malloc %s iomem fail!", mz_name);
 265                 return -ENOMEM;
 266         }
 267
 268         hw->iomz = iomz;
 269         hw->iomz_sz = total_size;
 270         hw->sqe = iomz->addr;
 271         hw->cqe = (void *)((char *)iomz->addr + sq_size);
 272         hw->status = (void *)((char *)iomz->addr + sq_size + cq_size);
 273         hw->sqe_iova = iomz->iova;
 274         hw->cqe_iova = iomz->iova + sq_size;
 275         hw->sq_depth_mask = ring_size - 1;
 276         hw->cq_depth = ring_size + HISI_DMA_CQ_RESERVED;
 277         hisi_dma_zero_iomem(hw);
 278
 279         return 0;
 280 }
 281
 282 static void
 283 hisi_dma_free_iomem(struct hisi_dma_dev *hw)
 284 {
 285         if (hw->iomz != NULL)
 286                 rte_memzone_free(hw->iomz);
 287
 288         hw->iomz = NULL;
 289         hw->sqe = NULL;
 290         hw->cqe = NULL;
 291         hw->status = NULL;
 292         hw->sqe_iova = 0;
 293         hw->cqe_iova = 0;
 294         hw->sq_depth_mask = 0;
 295         hw->cq_depth = 0;
 296 }
 297
 298 static int
 299 hisi_dma_info_get(const struct rte_dma_dev *dev,
 300                   struct rte_dma_info *dev_info,
 301                   uint32_t info_sz)
 302 {
 303         RTE_SET_USED(dev);
 304         RTE_SET_USED(info_sz);
 305
 306         dev_info->dev_capa = RTE_DMA_CAPA_MEM_TO_MEM |
 307                              RTE_DMA_CAPA_OPS_COPY;
 308         dev_info->max_vchans = 1;
 309         dev_info->max_desc = HISI_DMA_MAX_DESC_NUM;
 310         dev_info->min_desc = HISI_DMA_MIN_DESC_NUM;
 311
 312         return 0;
 313 }
 314
 315 static int
 316 hisi_dma_configure(struct rte_dma_dev *dev,
 317                    const struct rte_dma_conf *conf,
 318                    uint32_t conf_sz)
 319 {
 320         RTE_SET_USED(dev);
 321         RTE_SET_USED(conf);
 322         RTE_SET_USED(conf_sz);
 323         return 0;
 324 }
 325
 326 static int
 327 hisi_dma_vchan_setup(struct rte_dma_dev *dev, uint16_t vchan,
 328                      const struct rte_dma_vchan_conf *conf,
 329                      uint32_t conf_sz)
 330 {
 331         struct hisi_dma_dev *hw = dev->data->dev_private;
 332         int ret;
 333
 334         RTE_SET_USED(vchan);
 335         RTE_SET_USED(conf_sz);
 336
 337         if (!rte_is_power_of_2(conf->nb_desc)) {
 338                 HISI_DMA_ERR(hw, "Number of desc must be power of 2!");
 339                 return -EINVAL;
 340         }
 341
 342         hisi_dma_free_iomem(hw);
 343         ret = hisi_dma_alloc_iomem(hw, conf->nb_desc, dev->data->dev_name);
 344         if (ret)
 345                 return ret;
 346
 347         return 0;
 348 }
 349
 350 static int
 351 hisi_dma_start(struct rte_dma_dev *dev)
 352 {
 353         struct hisi_dma_dev *hw = dev->data->dev_private;
 354
 355         if (hw->iomz == NULL) {
 356                 HISI_DMA_ERR(hw, "Vchan was not setup, start fail!\n");
 357                 return -EINVAL;
 358         }
 359
 360         /* Reset the dmadev to a known state, include:
 361          *   1) zero iomem, also include status fields.
 362          *   2) init hardware register.
 363          *   3) init index values to zero.
 364          *   4) init running statistics.
 365          */
 366         hisi_dma_zero_iomem(hw);
 367         hisi_dma_init_hw(hw);
 368         hw->ridx = 0;
 369         hw->cridx = 0;
 370         hw->sq_head = 0;
 371         hw->sq_tail = 0;
 372         hw->cq_sq_head = 0;
 373         hw->cq_head = 0;
 374         hw->cqs_completed = 0;
 375         hw->cqe_vld = 1;
 376         hw->submitted = 0;
 377         hw->completed = 0;
 378         hw->errors = 0;
 379
 380         hisi_dma_update_queue_bit(hw, HISI_DMA_QUEUE_CTRL0_REG,
 381                                   HISI_DMA_QUEUE_CTRL0_EN_B, true);
 382
 383         return 0;
 384 }
 385
 386 static int
 387 hisi_dma_stop(struct rte_dma_dev *dev)
 388 {
 389         return hisi_dma_reset_hw(dev->data->dev_private);
 390 }
 391
 392 static int
 393 hisi_dma_close(struct rte_dma_dev *dev)
 394 {
 395         /* The dmadev already stopped */
 396         hisi_dma_free_iomem(dev->data->dev_private);
 397         return 0;
 398 }
 399
 400 static int
 401 hisi_dma_stats_get(const struct rte_dma_dev *dev, uint16_t vchan,
 402                    struct rte_dma_stats *stats,
 403                    uint32_t stats_sz)
 404 {
 405         struct hisi_dma_dev *hw = dev->data->dev_private;
 406
 407         RTE_SET_USED(vchan);
 408         RTE_SET_USED(stats_sz);
 409         stats->submitted = hw->submitted;
 410         stats->completed = hw->completed;
 411         stats->errors = hw->errors;
 412
 413         return 0;
 414 }
 415
 416 static int
 417 hisi_dma_stats_reset(struct rte_dma_dev *dev, uint16_t vchan)
 418 {
 419         struct hisi_dma_dev *hw = dev->data->dev_private;
 420
 421         RTE_SET_USED(vchan);
 422         hw->submitted = 0;
 423         hw->completed = 0;
 424         hw->errors = 0;
 425
 426         return 0;
 427 }
 428
 429 static void
 430 hisi_dma_get_dump_range(struct hisi_dma_dev *hw, uint32_t *start, uint32_t *end)
 431 {
 432         if (hw->reg_layout == HISI_DMA_REG_LAYOUT_HIP08) {
 433                 *start = HISI_DMA_HIP08_DUMP_START_REG;
 434                 *end = HISI_DMA_HIP08_DUMP_END_REG;
 435         } else {
 436                 *start = 0;
 437                 *end = 0;
 438         }
 439 }
 440
 441 static void
 442 hisi_dma_dump_common(struct hisi_dma_dev *hw, FILE *f)
 443 {
 444 #define DUMP_REGNUM_PER_LINE    4
 445
 446         uint32_t start, end;
 447         uint32_t cnt, i;
 448
 449         hisi_dma_get_dump_range(hw, &start, &end);
 450
 451         (void)fprintf(f, "    common-register:\n");
 452
 453         cnt = 0;
 454         for (i = start; i <= end; i += sizeof(uint32_t)) {
 455                 if (cnt % DUMP_REGNUM_PER_LINE == 0)
 456                         (void)fprintf(f, "      [%4x]:", i);
 457                 (void)fprintf(f, " 0x%08x", hisi_dma_read_dev(hw, i));
 458                 cnt++;
 459                 if (cnt % DUMP_REGNUM_PER_LINE == 0)
 460                         (void)fprintf(f, "\n");
 461         }
 462         if (cnt % DUMP_REGNUM_PER_LINE)
 463                 (void)fprintf(f, "\n");
 464 }
 465
 466 static void
 467 hisi_dma_dump_read_queue(struct hisi_dma_dev *hw, uint32_t qoff,
 468                          char *buffer, int max_sz)
 469 {
 470         memset(buffer, 0, max_sz);
 471
 472         /* Address-related registers are not printed for security reasons. */
 473         if (qoff == HISI_DMA_QUEUE_SQ_BASE_L_REG ||
 474             qoff == HISI_DMA_QUEUE_SQ_BASE_H_REG ||
 475             qoff == HISI_DMA_QUEUE_CQ_BASE_L_REG ||
 476             qoff == HISI_DMA_QUEUE_CQ_BASE_H_REG) {
 477                 (void)snprintf(buffer, max_sz, "**********");
 478                 return;
 479         }
 480
 481         (void)snprintf(buffer, max_sz, "0x%08x", hisi_dma_read_queue(hw, qoff));
 482 }
 483
 484 static void
 485 hisi_dma_dump_queue(struct hisi_dma_dev *hw, FILE *f)
 486 {
 487 #define REG_FMT_LEN     32
 488         char buf[REG_FMT_LEN] = { 0 };
 489         uint32_t i;
 490
 491         (void)fprintf(f, "    queue-register:\n");
 492         for (i = 0; i < HISI_DMA_QUEUE_REGION_SIZE; ) {
 493                 hisi_dma_dump_read_queue(hw, i, buf, sizeof(buf));
 494                 (void)fprintf(f, "      [%2x]: %s", i, buf);
 495                 i += sizeof(uint32_t);
 496                 hisi_dma_dump_read_queue(hw, i, buf, sizeof(buf));
 497                 (void)fprintf(f, " %s", buf);
 498                 i += sizeof(uint32_t);
 499                 hisi_dma_dump_read_queue(hw, i, buf, sizeof(buf));
 500                 (void)fprintf(f, " %s", buf);
 501                 i += sizeof(uint32_t);
 502                 hisi_dma_dump_read_queue(hw, i, buf, sizeof(buf));
 503                 (void)fprintf(f, " %s\n", buf);
 504                 i += sizeof(uint32_t);
 505         }
 506 }
 507
 508 static int
 509 hisi_dma_dump(const struct rte_dma_dev *dev, FILE *f)
 510 {
 511         struct hisi_dma_dev *hw = dev->data->dev_private;
 512
 513         (void)fprintf(f,
 514                 "    revision: 0x%x queue_id: %u ring_size: %u\n"
 515                 "    ridx: %u cridx: %u\n"
 516                 "    sq_head: %u sq_tail: %u cq_sq_head: %u\n"
 517                 "    cq_head: %u cqs_completed: %u cqe_vld: %u\n"
 518                 "    submitted: %" PRIu64 " completed: %" PRIu64 " errors %"
 519                 PRIu64"\n",
 520                 hw->revision, hw->queue_id,
 521                 hw->sq_depth_mask > 0 ? hw->sq_depth_mask + 1 : 0,
 522                 hw->ridx, hw->cridx,
 523                 hw->sq_head, hw->sq_tail, hw->cq_sq_head,
 524                 hw->cq_head, hw->cqs_completed, hw->cqe_vld,
 525                 hw->submitted, hw->completed, hw->errors);
 526         hisi_dma_dump_queue(hw, f);
 527         hisi_dma_dump_common(hw, f);
 528
 529         return 0;
 530 }
 531
 532 static int
 533 hisi_dma_copy(void *dev_private, uint16_t vchan,
 534                  rte_iova_t src, rte_iova_t dst,
 535                  uint32_t length, uint64_t flags)
 536 {
 537         struct hisi_dma_dev *hw = dev_private;
 538         struct hisi_dma_sqe *sqe = &hw->sqe[hw->sq_tail];
 539
 540         RTE_SET_USED(vchan);
 541
 542         if (((hw->sq_tail + 1) & hw->sq_depth_mask) == hw->sq_head)
 543                 return -ENOSPC;
 544
 545         sqe->dw0 = rte_cpu_to_le_32(SQE_OPCODE_M2M);
 546         sqe->dw1 = 0;
 547         sqe->dw2 = 0;
 548         sqe->length = rte_cpu_to_le_32(length);
 549         sqe->src_addr = rte_cpu_to_le_64(src);
 550         sqe->dst_addr = rte_cpu_to_le_64(dst);
 551         hw->sq_tail = (hw->sq_tail + 1) & hw->sq_depth_mask;
 552         hw->submitted++;
 553
 554         if (flags & RTE_DMA_OP_FLAG_FENCE)
 555                 sqe->dw0 |= rte_cpu_to_le_32(SQE_FENCE_FLAG);
 556         if (flags & RTE_DMA_OP_FLAG_SUBMIT)
 557                 rte_write32(rte_cpu_to_le_32(hw->sq_tail), hw->sq_tail_reg);
 558
 559         return hw->ridx++;
 560 }
 561
 562 static int
 563 hisi_dma_submit(void *dev_private, uint16_t vchan)
 564 {
 565         struct hisi_dma_dev *hw = dev_private;
 566
 567         RTE_SET_USED(vchan);
 568         rte_write32(rte_cpu_to_le_32(hw->sq_tail), hw->sq_tail_reg);
 569
 570         return 0;
 571 }
 572
 573 static inline void
 574 hisi_dma_scan_cq(struct hisi_dma_dev *hw)
 575 {
 576         volatile struct hisi_dma_cqe *cqe;
 577         uint16_t csq_head = hw->cq_sq_head;
 578         uint16_t cq_head = hw->cq_head;
 579         uint16_t count = 0;
 580         uint64_t misc;
 581
 582         while (true) {
 583                 cqe = &hw->cqe[cq_head];
 584                 misc = cqe->misc;
 585                 misc = rte_le_to_cpu_64(misc);
 586                 if (FIELD_GET(CQE_VALID_B, misc) != hw->cqe_vld)
 587                         break;
 588
 589                 csq_head = FIELD_GET(CQE_SQ_HEAD_MASK, misc);
 590                 if (unlikely(misc & CQE_STATUS_MASK))
 591                         hw->status[csq_head] = FIELD_GET(CQE_STATUS_MASK,
 592                                                          misc);
 593
 594                 count++;
 595                 cq_head++;
 596                 if (cq_head == hw->cq_depth) {
 597                         hw->cqe_vld = !hw->cqe_vld;
 598                         cq_head = 0;
 599                 }
 600         }
 601
 602         if (count == 0)
 603                 return;
 604
 605         hw->cq_head = cq_head;
 606         hw->cq_sq_head = (csq_head + 1) & hw->sq_depth_mask;
 607         hw->cqs_completed += count;
 608         if (hw->cqs_completed >= HISI_DMA_CQ_RESERVED) {
 609                 rte_write32(rte_cpu_to_le_32(cq_head), hw->cq_head_reg);
 610                 hw->cqs_completed = 0;
 611         }
 612 }
 613
 614 static inline uint16_t
 615 hisi_dma_calc_cpls(struct hisi_dma_dev *hw, const uint16_t nb_cpls)
 616 {
 617         uint16_t cpl_num;
 618
 619         if (hw->cq_sq_head >= hw->sq_head)
 620                 cpl_num = hw->cq_sq_head - hw->sq_head;
 621         else
 622                 cpl_num = hw->sq_depth_mask + 1 - hw->sq_head + hw->cq_sq_head;
 623
 624         if (cpl_num > nb_cpls)
 625                 cpl_num = nb_cpls;
 626
 627         return cpl_num;
 628 }
 629
 630 static uint16_t
 631 hisi_dma_completed(void *dev_private,
 632                    uint16_t vchan, const uint16_t nb_cpls,
 633                    uint16_t *last_idx, bool *has_error)
 634 {
 635         struct hisi_dma_dev *hw = dev_private;
 636         uint16_t sq_head = hw->sq_head;
 637         uint16_t cpl_num, i;
 638
 639         RTE_SET_USED(vchan);
 640         hisi_dma_scan_cq(hw);
 641
 642         cpl_num = hisi_dma_calc_cpls(hw, nb_cpls);
 643         for (i = 0; i < cpl_num; i++) {
 644                 if (hw->status[sq_head]) {
 645                         *has_error = true;
 646                         break;
 647                 }
 648                 sq_head = (sq_head + 1) & hw->sq_depth_mask;
 649         }
 650         if (i > 0) {
 651                 hw->cridx += i;
 652                 *last_idx = hw->cridx - 1;
 653                 hw->sq_head = sq_head;
 654         }
 655         hw->completed += i;
 656
 657         return i;
 658 }
 659
 660 static enum rte_dma_status_code
 661 hisi_dma_convert_status(uint16_t status)
 662 {
 663         switch (status) {
 664         case HISI_DMA_STATUS_SUCCESS:
 665                 return RTE_DMA_STATUS_SUCCESSFUL;
 666         case HISI_DMA_STATUS_INVALID_OPCODE:
 667                 return RTE_DMA_STATUS_INVALID_OPCODE;
 668         case HISI_DMA_STATUS_INVALID_LENGTH:
 669                 return RTE_DMA_STATUS_INVALID_LENGTH;
 670         case HISI_DMA_STATUS_USER_ABORT:
 671                 return RTE_DMA_STATUS_USER_ABORT;
 672         case HISI_DMA_STATUS_REMOTE_READ_ERROR:
 673         case HISI_DMA_STATUS_AXI_READ_ERROR:
 674                 return RTE_DMA_STATUS_BUS_READ_ERROR;
 675         case HISI_DMA_STATUS_AXI_WRITE_ERROR:
 676                 return RTE_DMA_STATUS_BUS_WRITE_ERROR;
 677         case HISI_DMA_STATUS_DATA_POISON:
 678         case HISI_DMA_STATUS_REMOTE_DATA_POISION:
 679                 return RTE_DMA_STATUS_DATA_POISION;
 680         case HISI_DMA_STATUS_SQE_READ_ERROR:
 681         case HISI_DMA_STATUS_SQE_READ_POISION:
 682                 return RTE_DMA_STATUS_DESCRIPTOR_READ_ERROR;
 683         case HISI_DMA_STATUS_LINK_DOWN_ERROR:
 684                 return RTE_DMA_STATUS_DEV_LINK_ERROR;
 685         default:
 686                 return RTE_DMA_STATUS_ERROR_UNKNOWN;
 687         }
 688 }
 689
 690 static uint16_t
 691 hisi_dma_completed_status(void *dev_private,
 692                           uint16_t vchan, const uint16_t nb_cpls,
 693                           uint16_t *last_idx, enum rte_dma_status_code *status)
 694 {
 695         struct hisi_dma_dev *hw = dev_private;
 696         uint16_t sq_head = hw->sq_head;
 697         uint16_t cpl_num, i;
 698
 699         RTE_SET_USED(vchan);
 700         hisi_dma_scan_cq(hw);
 701
 702         cpl_num = hisi_dma_calc_cpls(hw, nb_cpls);
 703         for (i = 0; i < cpl_num; i++) {
 704                 status[i] = hisi_dma_convert_status(hw->status[sq_head]);
 705                 hw->errors += !!status[i];
 706                 hw->status[sq_head] = HISI_DMA_STATUS_SUCCESS;
 707                 sq_head = (sq_head + 1) & hw->sq_depth_mask;
 708         }
 709         if (likely(cpl_num > 0)) {
 710                 hw->cridx += cpl_num;
 711                 *last_idx = hw->cridx - 1;
 712                 hw->sq_head = sq_head;
 713         }
 714         hw->completed += cpl_num;
 715
 716         return cpl_num;
 717 }
 718
 719 static uint16_t
 720 hisi_dma_burst_capacity(const void *dev_private, uint16_t vchan)
 721 {
 722         const struct hisi_dma_dev *hw = dev_private;
 723         uint16_t sq_head = hw->sq_head;
 724         uint16_t sq_tail = hw->sq_tail;
 725
 726         RTE_SET_USED(vchan);
 727
 728         return (sq_tail >= sq_head) ? hw->sq_depth_mask - sq_tail + sq_head :
 729                                       sq_head - 1 - sq_tail;
 730 }
 731
 732 static void
 733 hisi_dma_gen_pci_device_name(const struct rte_pci_device *pci_dev,
 734                              char *name, size_t size)
 735 {
 736         memset(name, 0, size);
 737         (void)snprintf(name, size, "%x:%x.%x",
 738                  pci_dev->addr.bus, pci_dev->addr.devid,
 739                  pci_dev->addr.function);
 740 }
 741
 742 static void
 743 hisi_dma_gen_dev_name(const struct rte_pci_device *pci_dev,
 744                       uint8_t queue_id, char *name, size_t size)
 745 {
 746         memset(name, 0, size);
 747         (void)snprintf(name, size, "%x:%x.%x-ch%u",
 748                  pci_dev->addr.bus, pci_dev->addr.devid,
 749                  pci_dev->addr.function, queue_id);
 750 }
 751
 752 /**
 753  * Hardware queue state machine:
 754  *
 755  *   -----------  dmadev_create   ------------------
 756  *   | Unknown | ---------------> |      IDLE      |
 757  *   -----------                  ------------------
 758  *                                   ^          |
 759  *                                   |          |dev_start
 760  *                           dev_stop|          |
 761  *                                   |          v
 762  *                                ------------------
 763  *                                |      RUN       |
 764  *                                ------------------
 765  *
 766  */
 767 static const struct rte_dma_dev_ops hisi_dmadev_ops = {
 768         .dev_info_get     = hisi_dma_info_get,
 769         .dev_configure    = hisi_dma_configure,
 770         .dev_start        = hisi_dma_start,
 771         .dev_stop         = hisi_dma_stop,
 772         .dev_close        = hisi_dma_close,
 773         .vchan_setup      = hisi_dma_vchan_setup,
 774         .stats_get        = hisi_dma_stats_get,
 775         .stats_reset      = hisi_dma_stats_reset,
 776         .dev_dump         = hisi_dma_dump,
 777 };
 778
 779 static int
 780 hisi_dma_create(struct rte_pci_device *pci_dev, uint8_t queue_id,
 781                 uint8_t revision)
 782 {
 783 #define REG_PCI_BAR_INDEX       2
 784
 785         char name[RTE_DEV_NAME_MAX_LEN];
 786         struct rte_dma_dev *dev;
 787         struct hisi_dma_dev *hw;
 788         int ret;
 789
 790         hisi_dma_gen_dev_name(pci_dev, queue_id, name, sizeof(name));
 791         dev = rte_dma_pmd_allocate(name, pci_dev->device.numa_node,
 792                                    sizeof(*hw));
 793         if (dev == NULL) {
 794                 HISI_DMA_LOG(ERR, "%s allocate dmadev fail!", name);
 795                 return -EINVAL;
 796         }
 797
 798         dev->device = &pci_dev->device;
 799         dev->dev_ops = &hisi_dmadev_ops;
 800         dev->fp_obj->dev_private = dev->data->dev_private;
 801         dev->fp_obj->copy = hisi_dma_copy;
 802         dev->fp_obj->submit = hisi_dma_submit;
 803         dev->fp_obj->completed = hisi_dma_completed;
 804         dev->fp_obj->completed_status = hisi_dma_completed_status;
 805         dev->fp_obj->burst_capacity = hisi_dma_burst_capacity;
 806
 807         hw = dev->data->dev_private;
 808         hw->data = dev->data;
 809         hw->revision = revision;
 810         hw->reg_layout = hisi_dma_reg_layout(revision);
 811         hw->io_base = pci_dev->mem_resource[REG_PCI_BAR_INDEX].addr;
 812         hw->queue_id = queue_id;
 813         hw->sq_tail_reg = hisi_dma_queue_regaddr(hw,
 814                                                  HISI_DMA_QUEUE_SQ_TAIL_REG);
 815         hw->cq_head_reg = hisi_dma_queue_regaddr(hw,
 816                                                  HISI_DMA_QUEUE_CQ_HEAD_REG);
 817
 818         ret = hisi_dma_reset_hw(hw);
 819         if (ret) {
 820                 HISI_DMA_LOG(ERR, "%s init device fail!", name);
 821                 (void)rte_dma_pmd_release(name);
 822                 return -EIO;
 823         }
 824
 825         dev->state = RTE_DMA_DEV_READY;
 826         HISI_DMA_LOG(DEBUG, "%s create dmadev success!", name);
 827
 828         return 0;
 829 }
 830
 831 static int
 832 hisi_dma_check_revision(struct rte_pci_device *pci_dev, const char *name,
 833                         uint8_t *out_revision)
 834 {
 835         uint8_t revision;
 836         int ret;
 837
 838         ret = rte_pci_read_config(pci_dev, &revision, 1,
 839                                   HISI_DMA_PCI_REVISION_ID_REG);
 840         if (ret != 1) {
 841                 HISI_DMA_LOG(ERR, "%s read PCI revision failed!", name);
 842                 return -EINVAL;
 843         }
 844         if (hisi_dma_reg_layout(revision) == HISI_DMA_REG_LAYOUT_INVALID) {
 845                 HISI_DMA_LOG(ERR, "%s revision: 0x%x not supported!",
 846                              name, revision);
 847                 return -EINVAL;
 848         }
 849
 850         *out_revision = revision;
 851         return 0;
 852 }
 853
 854 static int
 855 hisi_dma_probe(struct rte_pci_driver *pci_drv __rte_unused,
 856                struct rte_pci_device *pci_dev)
 857 {
 858         char name[RTE_DEV_NAME_MAX_LEN] = { 0 };
 859         uint8_t revision;
 860         uint8_t i;
 861         int ret;
 862
 863         hisi_dma_gen_pci_device_name(pci_dev, name, sizeof(name));
 864
 865         if (pci_dev->mem_resource[2].addr == NULL) {
 866                 HISI_DMA_LOG(ERR, "%s BAR2 is NULL!\n", name);
 867                 return -ENODEV;
 868         }
 869
 870         ret = hisi_dma_check_revision(pci_dev, name, &revision);
 871         if (ret)
 872                 return ret;
 873         HISI_DMA_LOG(DEBUG, "%s read PCI revision: 0x%x", name, revision);
 874
 875         hisi_dma_init_gbl(pci_dev->mem_resource[2].addr, revision);
 876
 877         for (i = 0; i < HISI_DMA_MAX_HW_QUEUES; i++) {
 878                 ret = hisi_dma_create(pci_dev, i, revision);
 879                 if (ret) {
 880                         HISI_DMA_LOG(ERR, "%s create dmadev %u failed!",
 881                                      name, i);
 882                         break;
 883                 }
 884         }
 885
 886         return ret;
 887 }
 888
 889 static int
 890 hisi_dma_remove(struct rte_pci_device *pci_dev)
 891 {
 892         char name[RTE_DEV_NAME_MAX_LEN];
 893         uint8_t i;
 894         int ret;
 895
 896         for (i = 0; i < HISI_DMA_MAX_HW_QUEUES; i++) {
 897                 hisi_dma_gen_dev_name(pci_dev, i, name, sizeof(name));
 898                 ret = rte_dma_pmd_release(name);
 899                 if (ret)
 900                         return ret;
 901         }
 902
 903         return 0;
 904 }
 905
 906 static const struct rte_pci_id pci_id_hisi_dma_map[] = {
 907         { RTE_PCI_DEVICE(PCI_VENDOR_ID_HUAWEI, HISI_DMA_DEVICE_ID) },
 908         { .vendor_id = 0, }, /* sentinel */
 909 };
 910
 911 static struct rte_pci_driver hisi_dma_pmd_drv = {
 912         .id_table  = pci_id_hisi_dma_map,
 913         .drv_flags = RTE_PCI_DRV_NEED_MAPPING,
 914         .probe     = hisi_dma_probe,
 915         .remove    = hisi_dma_remove,
 916 };
 917
 918 RTE_PMD_REGISTER_PCI(dma_hisilicon, hisi_dma_pmd_drv);
 919 RTE_PMD_REGISTER_PCI_TABLE(dma_hisilicon, pci_id_hisi_dma_map);
 920 RTE_PMD_REGISTER_KMOD_DEP(dma_hisilicon, "vfio-pci");