drivers/soc/hisilicon/kunpeng_hccs.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * The Huawei Cache Coherence System (HCCS) is a multi-chip interconnection
   4  * bus protocol.
   5  *
   6  * Copyright (c) 2023 Hisilicon Limited.
   7  * Author: Huisong Li <lihuisong@huawei.com>
   8  *
   9  * HCCS driver for Kunpeng SoC provides the following features:
  10  * - Retrieve the following information about each port:
  11  *    - port type
  12  *    - lane mode
  13  *    - enable
  14  *    - current lane mode
  15  *    - link finite state machine
  16  *    - lane mask
  17  *    - CRC error count
  18  *
  19  * - Retrieve the following information about all the ports on the chip or
  20  *   the die:
  21  *    - if all enabled ports are in linked
  22  *    - if all linked ports are in full lane
  23  *    - CRC error count sum
  24  */
  25 #include <linux/acpi.h>
  26 #include <linux/iopoll.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/sysfs.h>
  29
  30 #include <acpi/pcc.h>
  31
  32 #include "kunpeng_hccs.h"
  33
  34 /*
  35  * Arbitrary retries in case the remote processor is slow to respond
  36  * to PCC commands
  37  */
  38 #define HCCS_PCC_CMD_WAIT_RETRIES_NUM           500ULL
  39 #define HCCS_POLL_STATUS_TIME_INTERVAL_US       3
  40
  41 static struct hccs_port_info *kobj_to_port_info(struct kobject *k)
  42 {
  43         return container_of(k, struct hccs_port_info, kobj);
  44 }
  45
  46 static struct hccs_die_info *kobj_to_die_info(struct kobject *k)
  47 {
  48         return container_of(k, struct hccs_die_info, kobj);
  49 }
  50
  51 static struct hccs_chip_info *kobj_to_chip_info(struct kobject *k)
  52 {
  53         return container_of(k, struct hccs_chip_info, kobj);
  54 }
  55
  56 struct hccs_register_ctx {
  57         struct device *dev;
  58         u8 chan_id;
  59         int err;
  60 };
  61
  62 static acpi_status hccs_get_register_cb(struct acpi_resource *ares,
  63                                         void *context)
  64 {
  65         struct acpi_resource_generic_register *reg;
  66         struct hccs_register_ctx *ctx = context;
  67
  68         if (ares->type != ACPI_RESOURCE_TYPE_GENERIC_REGISTER)
  69                 return AE_OK;
  70
  71         reg = &ares->data.generic_reg;
  72         if (reg->space_id != ACPI_ADR_SPACE_PLATFORM_COMM) {
  73                 dev_err(ctx->dev, "Bad register resource.\n");
  74                 ctx->err = -EINVAL;
  75                 return AE_ERROR;
  76         }
  77         ctx->chan_id = reg->access_size;
  78
  79         return AE_OK;
  80 }
  81
  82 static int hccs_get_pcc_chan_id(struct hccs_dev *hdev)
  83 {
  84         acpi_handle handle = ACPI_HANDLE(hdev->dev);
  85         struct hccs_register_ctx ctx = {0};
  86         acpi_status status;
  87
  88         if (!acpi_has_method(handle, METHOD_NAME__CRS)) {
  89                 dev_err(hdev->dev, "No _CRS method.\n");
  90                 return -ENODEV;
  91         }
  92
  93         ctx.dev = hdev->dev;
  94         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
  95                                      hccs_get_register_cb, &ctx);
  96         if (ACPI_FAILURE(status))
  97                 return ctx.err;
  98         hdev->chan_id = ctx.chan_id;
  99
 100         return 0;
 101 }
 102
 103 static void hccs_chan_tx_done(struct mbox_client *cl, void *msg, int ret)
 104 {
 105         if (ret < 0)
 106                 pr_debug("TX did not complete: CMD sent:0x%x, ret:%d\n",
 107                          *(u8 *)msg, ret);
 108         else
 109                 pr_debug("TX completed. CMD sent:0x%x, ret:%d\n",
 110                          *(u8 *)msg, ret);
 111 }
 112
 113 static void hccs_pcc_rx_callback(struct mbox_client *cl, void *mssg)
 114 {
 115         struct hccs_mbox_client_info *cl_info =
 116                         container_of(cl, struct hccs_mbox_client_info, client);
 117
 118         complete(&cl_info->done);
 119 }
 120
 121 static void hccs_unregister_pcc_channel(struct hccs_dev *hdev)
 122 {
 123         struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
 124
 125         if (cl_info->pcc_comm_addr)
 126                 iounmap(cl_info->pcc_comm_addr);
 127         pcc_mbox_free_channel(hdev->cl_info.pcc_chan);
 128 }
 129
 130 static int hccs_register_pcc_channel(struct hccs_dev *hdev)
 131 {
 132         struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
 133         struct mbox_client *cl = &cl_info->client;
 134         struct pcc_mbox_chan *pcc_chan;
 135         struct device *dev = hdev->dev;
 136         int rc;
 137
 138         cl->dev = dev;
 139         cl->tx_block = false;
 140         cl->knows_txdone = true;
 141         cl->tx_done = hccs_chan_tx_done;
 142         cl->rx_callback = hdev->verspec_data->rx_callback;
 143         init_completion(&cl_info->done);
 144
 145         pcc_chan = pcc_mbox_request_channel(cl, hdev->chan_id);
 146         if (IS_ERR(pcc_chan)) {
 147                 dev_err(dev, "PPC channel request failed.\n");
 148                 rc = -ENODEV;
 149                 goto out;
 150         }
 151         cl_info->pcc_chan = pcc_chan;
 152         cl_info->mbox_chan = pcc_chan->mchan;
 153
 154         /*
 155          * pcc_chan->latency is just a nominal value. In reality the remote
 156          * processor could be much slower to reply. So add an arbitrary amount
 157          * of wait on top of nominal.
 158          */
 159         cl_info->deadline_us =
 160                         HCCS_PCC_CMD_WAIT_RETRIES_NUM * pcc_chan->latency;
 161         if (!hdev->verspec_data->has_txdone_irq &&
 162             cl_info->mbox_chan->mbox->txdone_irq) {
 163                 dev_err(dev, "PCC IRQ in PCCT is enabled.\n");
 164                 rc = -EINVAL;
 165                 goto err_mbx_channel_free;
 166         } else if (hdev->verspec_data->has_txdone_irq &&
 167                    !cl_info->mbox_chan->mbox->txdone_irq) {
 168                 dev_err(dev, "PCC IRQ in PCCT isn't supported.\n");
 169                 rc = -EINVAL;
 170                 goto err_mbx_channel_free;
 171         }
 172
 173         if (pcc_chan->shmem_base_addr) {
 174                 cl_info->pcc_comm_addr = ioremap(pcc_chan->shmem_base_addr,
 175                                                  pcc_chan->shmem_size);
 176                 if (!cl_info->pcc_comm_addr) {
 177                         dev_err(dev, "Failed to ioremap PCC communication region for channel-%u.\n",
 178                                 hdev->chan_id);
 179                         rc = -ENOMEM;
 180                         goto err_mbx_channel_free;
 181                 }
 182         }
 183
 184         return 0;
 185
 186 err_mbx_channel_free:
 187         pcc_mbox_free_channel(cl_info->pcc_chan);
 188 out:
 189         return rc;
 190 }
 191
 192 static int hccs_wait_cmd_complete_by_poll(struct hccs_dev *hdev)
 193 {
 194         struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
 195         struct acpi_pcct_shared_memory __iomem *comm_base =
 196                                                         cl_info->pcc_comm_addr;
 197         u16 status;
 198         int ret;
 199
 200         /*
 201          * Poll PCC status register every 3us(delay_us) for maximum of
 202          * deadline_us(timeout_us) until PCC command complete bit is set(cond)
 203          */
 204         ret = readw_poll_timeout(&comm_base->status, status,
 205                                  status & PCC_STATUS_CMD_COMPLETE,
 206                                  HCCS_POLL_STATUS_TIME_INTERVAL_US,
 207                                  cl_info->deadline_us);
 208         if (unlikely(ret))
 209                 dev_err(hdev->dev, "poll PCC status failed, ret = %d.\n", ret);
 210
 211         return ret;
 212 }
 213
 214 static int hccs_wait_cmd_complete_by_irq(struct hccs_dev *hdev)
 215 {
 216         struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
 217
 218         if (!wait_for_completion_timeout(&cl_info->done,
 219                         usecs_to_jiffies(cl_info->deadline_us))) {
 220                 dev_err(hdev->dev, "PCC command executed timeout!\n");
 221                 return -ETIMEDOUT;
 222         }
 223
 224         return 0;
 225 }
 226
 227 static inline void hccs_fill_pcc_shared_mem_region(struct hccs_dev *hdev,
 228                                                    u8 cmd,
 229                                                    struct hccs_desc *desc,
 230                                                    void __iomem *comm_space,
 231                                                    u16 space_size)
 232 {
 233         struct acpi_pcct_shared_memory tmp = {
 234                 .signature = PCC_SIGNATURE | hdev->chan_id,
 235                 .command = cmd,
 236                 .status = 0,
 237         };
 238
 239         memcpy_toio(hdev->cl_info.pcc_comm_addr, (void *)&tmp,
 240                     sizeof(struct acpi_pcct_shared_memory));
 241
 242         /* Copy the message to the PCC comm space */
 243         memcpy_toio(comm_space, (void *)desc, space_size);
 244 }
 245
 246 static inline void hccs_fill_ext_pcc_shared_mem_region(struct hccs_dev *hdev,
 247                                                        u8 cmd,
 248                                                        struct hccs_desc *desc,
 249                                                        void __iomem *comm_space,
 250                                                        u16 space_size)
 251 {
 252         struct acpi_pcct_ext_pcc_shared_memory tmp = {
 253                 .signature = PCC_SIGNATURE | hdev->chan_id,
 254                 .flags = PCC_CMD_COMPLETION_NOTIFY,
 255                 .length = HCCS_PCC_SHARE_MEM_BYTES,
 256                 .command = cmd,
 257         };
 258
 259         memcpy_toio(hdev->cl_info.pcc_comm_addr, (void *)&tmp,
 260                     sizeof(struct acpi_pcct_ext_pcc_shared_memory));
 261
 262         /* Copy the message to the PCC comm space */
 263         memcpy_toio(comm_space, (void *)desc, space_size);
 264 }
 265
 266 static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
 267                              struct hccs_desc *desc)
 268 {
 269         const struct hccs_verspecific_data *verspec_data = hdev->verspec_data;
 270         struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
 271         struct hccs_fw_inner_head *fw_inner_head;
 272         void __iomem *comm_space;
 273         u16 space_size;
 274         int ret;
 275
 276         comm_space = cl_info->pcc_comm_addr + verspec_data->shared_mem_size;
 277         space_size = HCCS_PCC_SHARE_MEM_BYTES - verspec_data->shared_mem_size;
 278         verspec_data->fill_pcc_shared_mem(hdev, cmd, desc,
 279                                           comm_space, space_size);
 280         if (verspec_data->has_txdone_irq)
 281                 reinit_completion(&cl_info->done);
 282
 283         /* Ring doorbell */
 284         ret = mbox_send_message(cl_info->mbox_chan, &cmd);
 285         if (ret < 0) {
 286                 dev_err(hdev->dev, "Send PCC mbox message failed, ret = %d.\n",
 287                         ret);
 288                 goto end;
 289         }
 290
 291         ret = verspec_data->wait_cmd_complete(hdev);
 292         if (ret)
 293                 goto end;
 294
 295         /* Copy response data */
 296         memcpy_fromio((void *)desc, comm_space, space_size);
 297         fw_inner_head = &desc->rsp.fw_inner_head;
 298         if (fw_inner_head->retStatus) {
 299                 dev_err(hdev->dev, "Execute PCC command failed, error code = %u.\n",
 300                         fw_inner_head->retStatus);
 301                 ret = -EIO;
 302         }
 303
 304 end:
 305         if (verspec_data->has_txdone_irq)
 306                 mbox_chan_txdone(cl_info->mbox_chan, ret);
 307         else
 308                 mbox_client_txdone(cl_info->mbox_chan, ret);
 309         return ret;
 310 }
 311
 312 static void hccs_init_req_desc(struct hccs_desc *desc)
 313 {
 314         struct hccs_req_desc *req = &desc->req;
 315
 316         memset(desc, 0, sizeof(*desc));
 317         req->req_head.module_code = HCCS_SERDES_MODULE_CODE;
 318 }
 319
 320 static int hccs_get_dev_caps(struct hccs_dev *hdev)
 321 {
 322         struct hccs_desc desc;
 323         int ret;
 324
 325         hccs_init_req_desc(&desc);
 326         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DEV_CAP, &desc);
 327         if (ret) {
 328                 dev_err(hdev->dev, "Get device capabilities failed, ret = %d.\n",
 329                         ret);
 330                 return ret;
 331         }
 332         memcpy(&hdev->caps, desc.rsp.data, sizeof(hdev->caps));
 333
 334         return 0;
 335 }
 336
 337 static int hccs_query_chip_num_on_platform(struct hccs_dev *hdev)
 338 {
 339         struct hccs_desc desc;
 340         int ret;
 341
 342         hccs_init_req_desc(&desc);
 343         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_CHIP_NUM, &desc);
 344         if (ret) {
 345                 dev_err(hdev->dev, "query system chip number failed, ret = %d.\n",
 346                         ret);
 347                 return ret;
 348         }
 349
 350         hdev->chip_num = *((u8 *)&desc.rsp.data);
 351         if (!hdev->chip_num) {
 352                 dev_err(hdev->dev, "chip num obtained from firmware is zero.\n");
 353                 return -EINVAL;
 354         }
 355
 356         return 0;
 357 }
 358
 359 static int hccs_get_chip_info(struct hccs_dev *hdev,
 360                               struct hccs_chip_info *chip)
 361 {
 362         struct hccs_die_num_req_param *req_param;
 363         struct hccs_desc desc;
 364         int ret;
 365
 366         hccs_init_req_desc(&desc);
 367         req_param = (struct hccs_die_num_req_param *)desc.req.data;
 368         req_param->chip_id = chip->chip_id;
 369         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_NUM, &desc);
 370         if (ret)
 371                 return ret;
 372
 373         chip->die_num = *((u8 *)&desc.rsp.data);
 374
 375         return 0;
 376 }
 377
 378 static int hccs_query_chip_info_on_platform(struct hccs_dev *hdev)
 379 {
 380         struct hccs_chip_info *chip;
 381         int ret;
 382         u8 idx;
 383
 384         ret = hccs_query_chip_num_on_platform(hdev);
 385         if (ret) {
 386                 dev_err(hdev->dev, "query chip number on platform failed, ret = %d.\n",
 387                         ret);
 388                 return ret;
 389         }
 390
 391         hdev->chips = devm_kzalloc(hdev->dev,
 392                                 hdev->chip_num * sizeof(struct hccs_chip_info),
 393                                 GFP_KERNEL);
 394         if (!hdev->chips) {
 395                 dev_err(hdev->dev, "allocate all chips memory failed.\n");
 396                 return -ENOMEM;
 397         }
 398
 399         for (idx = 0; idx < hdev->chip_num; idx++) {
 400                 chip = &hdev->chips[idx];
 401                 chip->chip_id = idx;
 402                 ret = hccs_get_chip_info(hdev, chip);
 403                 if (ret) {
 404                         dev_err(hdev->dev, "get chip%u info failed, ret = %d.\n",
 405                                 idx, ret);
 406                         return ret;
 407                 }
 408                 chip->hdev = hdev;
 409         }
 410
 411         return 0;
 412 }
 413
 414 static int hccs_query_die_info_on_chip(struct hccs_dev *hdev, u8 chip_id,
 415                                        u8 die_idx, struct hccs_die_info *die)
 416 {
 417         struct hccs_die_info_req_param *req_param;
 418         struct hccs_die_info_rsp_data *rsp_data;
 419         struct hccs_desc desc;
 420         int ret;
 421
 422         hccs_init_req_desc(&desc);
 423         req_param = (struct hccs_die_info_req_param *)desc.req.data;
 424         req_param->chip_id = chip_id;
 425         req_param->die_idx = die_idx;
 426         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_INFO, &desc);
 427         if (ret)
 428                 return ret;
 429
 430         rsp_data = (struct hccs_die_info_rsp_data *)desc.rsp.data;
 431         die->die_id = rsp_data->die_id;
 432         die->port_num = rsp_data->port_num;
 433         die->min_port_id = rsp_data->min_port_id;
 434         die->max_port_id = rsp_data->max_port_id;
 435         if (die->min_port_id > die->max_port_id) {
 436                 dev_err(hdev->dev, "min port id(%u) > max port id(%u) on die_idx(%u).\n",
 437                         die->min_port_id, die->max_port_id, die_idx);
 438                 return -EINVAL;
 439         }
 440         if (die->max_port_id > HCCS_DIE_MAX_PORT_ID) {
 441                 dev_err(hdev->dev, "max port id(%u) on die_idx(%u) is too big.\n",
 442                         die->max_port_id, die_idx);
 443                 return -EINVAL;
 444         }
 445
 446         return 0;
 447 }
 448
 449 static int hccs_query_all_die_info_on_platform(struct hccs_dev *hdev)
 450 {
 451         struct device *dev = hdev->dev;
 452         struct hccs_chip_info *chip;
 453         struct hccs_die_info *die;
 454         u8 i, j;
 455         int ret;
 456
 457         for (i = 0; i < hdev->chip_num; i++) {
 458                 chip = &hdev->chips[i];
 459                 if (!chip->die_num)
 460                         continue;
 461
 462                 chip->dies = devm_kzalloc(hdev->dev,
 463                                 chip->die_num * sizeof(struct hccs_die_info),
 464                                 GFP_KERNEL);
 465                 if (!chip->dies) {
 466                         dev_err(dev, "allocate all dies memory on chip%u failed.\n",
 467                                 i);
 468                         return -ENOMEM;
 469                 }
 470
 471                 for (j = 0; j < chip->die_num; j++) {
 472                         die = &chip->dies[j];
 473                         ret = hccs_query_die_info_on_chip(hdev, i, j, die);
 474                         if (ret) {
 475                                 dev_err(dev, "get die idx (%u) info on chip%u failed, ret = %d.\n",
 476                                         j, i, ret);
 477                                 return ret;
 478                         }
 479                         die->chip = chip;
 480                 }
 481         }
 482
 483         return 0;
 484 }
 485
 486 static int hccs_get_bd_info(struct hccs_dev *hdev, u8 opcode,
 487                             struct hccs_desc *desc,
 488                             void *buf, size_t buf_len,
 489                             struct hccs_rsp_head *rsp_head)
 490 {
 491         struct hccs_rsp_head *head;
 492         struct hccs_rsp_desc *rsp;
 493         int ret;
 494
 495         ret = hccs_pcc_cmd_send(hdev, opcode, desc);
 496         if (ret)
 497                 return ret;
 498
 499         rsp = &desc->rsp;
 500         head = &rsp->rsp_head;
 501         if (head->data_len > buf_len) {
 502                 dev_err(hdev->dev,
 503                         "buffer overflow (buf_len = %zu, data_len = %u)!\n",
 504                         buf_len, head->data_len);
 505                 return -ENOMEM;
 506         }
 507
 508         memcpy(buf, rsp->data, head->data_len);
 509         *rsp_head = *head;
 510
 511         return 0;
 512 }
 513
 514 static int hccs_get_all_port_attr(struct hccs_dev *hdev,
 515                                   struct hccs_die_info *die,
 516                                   struct hccs_port_attr *attrs, u16 size)
 517 {
 518         struct hccs_die_comm_req_param *req_param;
 519         struct hccs_req_head *req_head;
 520         struct hccs_rsp_head rsp_head;
 521         struct hccs_desc desc;
 522         size_t left_buf_len;
 523         u32 data_len = 0;
 524         u8 start_id;
 525         u8 *buf;
 526         int ret;
 527
 528         buf = (u8 *)attrs;
 529         left_buf_len = sizeof(struct hccs_port_attr) * size;
 530         start_id = die->min_port_id;
 531         while (start_id <= die->max_port_id) {
 532                 hccs_init_req_desc(&desc);
 533                 req_head = &desc.req.req_head;
 534                 req_head->start_id = start_id;
 535                 req_param = (struct hccs_die_comm_req_param *)desc.req.data;
 536                 req_param->chip_id = die->chip->chip_id;
 537                 req_param->die_id = die->die_id;
 538
 539                 ret = hccs_get_bd_info(hdev, HCCS_GET_DIE_PORT_INFO, &desc,
 540                                        buf + data_len, left_buf_len, &rsp_head);
 541                 if (ret) {
 542                         dev_err(hdev->dev,
 543                                 "get the information of port%u on die%u failed, ret = %d.\n",
 544                                 start_id, die->die_id, ret);
 545                         return ret;
 546                 }
 547
 548                 data_len += rsp_head.data_len;
 549                 left_buf_len -= rsp_head.data_len;
 550                 if (unlikely(rsp_head.next_id <= start_id)) {
 551                         dev_err(hdev->dev,
 552                                 "next port id (%u) is not greater than last start id (%u) on die%u.\n",
 553                                 rsp_head.next_id, start_id, die->die_id);
 554                         return -EINVAL;
 555                 }
 556                 start_id = rsp_head.next_id;
 557         }
 558
 559         return 0;
 560 }
 561
 562 static int hccs_get_all_port_info_on_die(struct hccs_dev *hdev,
 563                                          struct hccs_die_info *die)
 564 {
 565         struct hccs_port_attr *attrs;
 566         struct hccs_port_info *port;
 567         int ret;
 568         u8 i;
 569
 570         attrs = kcalloc(die->port_num, sizeof(struct hccs_port_attr),
 571                         GFP_KERNEL);
 572         if (!attrs)
 573                 return -ENOMEM;
 574
 575         ret = hccs_get_all_port_attr(hdev, die, attrs, die->port_num);
 576         if (ret)
 577                 goto out;
 578
 579         for (i = 0; i < die->port_num; i++) {
 580                 port = &die->ports[i];
 581                 port->port_id = attrs[i].port_id;
 582                 port->port_type = attrs[i].port_type;
 583                 port->lane_mode = attrs[i].lane_mode;
 584                 port->enable = attrs[i].enable;
 585                 port->die = die;
 586         }
 587
 588 out:
 589         kfree(attrs);
 590         return ret;
 591 }
 592
 593 static int hccs_query_all_port_info_on_platform(struct hccs_dev *hdev)
 594 {
 595         struct device *dev = hdev->dev;
 596         struct hccs_chip_info *chip;
 597         struct hccs_die_info *die;
 598         u8 i, j;
 599         int ret;
 600
 601         for (i = 0; i < hdev->chip_num; i++) {
 602                 chip = &hdev->chips[i];
 603                 for (j = 0; j < chip->die_num; j++) {
 604                         die = &chip->dies[j];
 605                         if (!die->port_num)
 606                                 continue;
 607
 608                         die->ports = devm_kzalloc(dev,
 609                                 die->port_num * sizeof(struct hccs_port_info),
 610                                 GFP_KERNEL);
 611                         if (!die->ports) {
 612                                 dev_err(dev, "allocate ports memory on chip%u/die%u failed.\n",
 613                                         i, die->die_id);
 614                                 return -ENOMEM;
 615                         }
 616
 617                         ret = hccs_get_all_port_info_on_die(hdev, die);
 618                         if (ret) {
 619                                 dev_err(dev, "get all port info on chip%u/die%u failed, ret = %d.\n",
 620                                         i, die->die_id, ret);
 621                                 return ret;
 622                         }
 623                 }
 624         }
 625
 626         return 0;
 627 }
 628
 629 static int hccs_get_hw_info(struct hccs_dev *hdev)
 630 {
 631         int ret;
 632
 633         ret = hccs_query_chip_info_on_platform(hdev);
 634         if (ret) {
 635                 dev_err(hdev->dev, "query chip info on platform failed, ret = %d.\n",
 636                         ret);
 637                 return ret;
 638         }
 639
 640         ret = hccs_query_all_die_info_on_platform(hdev);
 641         if (ret) {
 642                 dev_err(hdev->dev, "query all die info on platform failed, ret = %d.\n",
 643                         ret);
 644                 return ret;
 645         }
 646
 647         ret = hccs_query_all_port_info_on_platform(hdev);
 648         if (ret) {
 649                 dev_err(hdev->dev, "query all port info on platform failed, ret = %d.\n",
 650                         ret);
 651                 return ret;
 652         }
 653
 654         return 0;
 655 }
 656
 657 static int hccs_query_port_link_status(struct hccs_dev *hdev,
 658                                        const struct hccs_port_info *port,
 659                                        struct hccs_link_status *link_status)
 660 {
 661         const struct hccs_die_info *die = port->die;
 662         const struct hccs_chip_info *chip = die->chip;
 663         struct hccs_port_comm_req_param *req_param;
 664         struct hccs_desc desc;
 665         int ret;
 666
 667         hccs_init_req_desc(&desc);
 668         req_param = (struct hccs_port_comm_req_param *)desc.req.data;
 669         req_param->chip_id = chip->chip_id;
 670         req_param->die_id = die->die_id;
 671         req_param->port_id = port->port_id;
 672         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_PORT_LINK_STATUS, &desc);
 673         if (ret) {
 674                 dev_err(hdev->dev,
 675                         "get port link status info failed, ret = %d.\n", ret);
 676                 return ret;
 677         }
 678
 679         *link_status = *((struct hccs_link_status *)desc.rsp.data);
 680
 681         return 0;
 682 }
 683
 684 static int hccs_query_port_crc_err_cnt(struct hccs_dev *hdev,
 685                                        const struct hccs_port_info *port,
 686                                        u64 *crc_err_cnt)
 687 {
 688         const struct hccs_die_info *die = port->die;
 689         const struct hccs_chip_info *chip = die->chip;
 690         struct hccs_port_comm_req_param *req_param;
 691         struct hccs_desc desc;
 692         int ret;
 693
 694         hccs_init_req_desc(&desc);
 695         req_param = (struct hccs_port_comm_req_param *)desc.req.data;
 696         req_param->chip_id = chip->chip_id;
 697         req_param->die_id = die->die_id;
 698         req_param->port_id = port->port_id;
 699         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_PORT_CRC_ERR_CNT, &desc);
 700         if (ret) {
 701                 dev_err(hdev->dev,
 702                         "get port crc error count failed, ret = %d.\n", ret);
 703                 return ret;
 704         }
 705
 706         memcpy(crc_err_cnt, &desc.rsp.data, sizeof(u64));
 707
 708         return 0;
 709 }
 710
 711 static int hccs_get_die_all_link_status(struct hccs_dev *hdev,
 712                                         const struct hccs_die_info *die,
 713                                         u8 *all_linked)
 714 {
 715         struct hccs_die_comm_req_param *req_param;
 716         struct hccs_desc desc;
 717         int ret;
 718
 719         if (die->port_num == 0) {
 720                 *all_linked = 1;
 721                 return 0;
 722         }
 723
 724         hccs_init_req_desc(&desc);
 725         req_param = (struct hccs_die_comm_req_param *)desc.req.data;
 726         req_param->chip_id = die->chip->chip_id;
 727         req_param->die_id = die->die_id;
 728         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_PORTS_LINK_STA, &desc);
 729         if (ret) {
 730                 dev_err(hdev->dev,
 731                         "get link status of all ports failed on die%u, ret = %d.\n",
 732                         die->die_id, ret);
 733                 return ret;
 734         }
 735
 736         *all_linked = *((u8 *)&desc.rsp.data);
 737
 738         return 0;
 739 }
 740
 741 static int hccs_get_die_all_port_lane_status(struct hccs_dev *hdev,
 742                                              const struct hccs_die_info *die,
 743                                              u8 *full_lane)
 744 {
 745         struct hccs_die_comm_req_param *req_param;
 746         struct hccs_desc desc;
 747         int ret;
 748
 749         if (die->port_num == 0) {
 750                 *full_lane = 1;
 751                 return 0;
 752         }
 753
 754         hccs_init_req_desc(&desc);
 755         req_param = (struct hccs_die_comm_req_param *)desc.req.data;
 756         req_param->chip_id = die->chip->chip_id;
 757         req_param->die_id = die->die_id;
 758         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_PORTS_LANE_STA, &desc);
 759         if (ret) {
 760                 dev_err(hdev->dev, "get lane status of all ports failed on die%u, ret = %d.\n",
 761                         die->die_id, ret);
 762                 return ret;
 763         }
 764
 765         *full_lane = *((u8 *)&desc.rsp.data);
 766
 767         return 0;
 768 }
 769
 770 static int hccs_get_die_total_crc_err_cnt(struct hccs_dev *hdev,
 771                                           const struct hccs_die_info *die,
 772                                           u64 *total_crc_err_cnt)
 773 {
 774         struct hccs_die_comm_req_param *req_param;
 775         struct hccs_desc desc;
 776         int ret;
 777
 778         if (die->port_num == 0) {
 779                 *total_crc_err_cnt = 0;
 780                 return 0;
 781         }
 782
 783         hccs_init_req_desc(&desc);
 784         req_param = (struct hccs_die_comm_req_param *)desc.req.data;
 785         req_param->chip_id = die->chip->chip_id;
 786         req_param->die_id = die->die_id;
 787         ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_PORTS_CRC_ERR_CNT, &desc);
 788         if (ret) {
 789                 dev_err(hdev->dev, "get crc error count sum failed on die%u, ret = %d.\n",
 790                         die->die_id, ret);
 791                 return ret;
 792         }
 793
 794         memcpy(total_crc_err_cnt, &desc.rsp.data, sizeof(u64));
 795
 796         return 0;
 797 }
 798
 799 static ssize_t hccs_show(struct kobject *k, struct attribute *attr, char *buf)
 800 {
 801         struct kobj_attribute *kobj_attr;
 802
 803         kobj_attr = container_of(attr, struct kobj_attribute, attr);
 804
 805         return kobj_attr->show(k, kobj_attr, buf);
 806 }
 807
 808 static const struct sysfs_ops hccs_comm_ops = {
 809         .show = hccs_show,
 810 };
 811
 812 static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
 813                          char *buf)
 814 {
 815         const struct hccs_port_info *port = kobj_to_port_info(kobj);
 816
 817         return sysfs_emit(buf, "HCCS-v%u\n", port->port_type);
 818 }
 819 static struct kobj_attribute hccs_type_attr = __ATTR_RO(type);
 820
 821 static ssize_t lane_mode_show(struct kobject *kobj, struct kobj_attribute *attr,
 822                               char *buf)
 823 {
 824         const struct hccs_port_info *port = kobj_to_port_info(kobj);
 825
 826         return sysfs_emit(buf, "x%u\n", port->lane_mode);
 827 }
 828 static struct kobj_attribute lane_mode_attr = __ATTR_RO(lane_mode);
 829
 830 static ssize_t enable_show(struct kobject *kobj,
 831                                  struct kobj_attribute *attr, char *buf)
 832 {
 833         const struct hccs_port_info *port = kobj_to_port_info(kobj);
 834
 835         return sysfs_emit(buf, "%u\n", port->enable);
 836 }
 837 static struct kobj_attribute port_enable_attr = __ATTR_RO(enable);
 838
 839 static ssize_t cur_lane_num_show(struct kobject *kobj,
 840                                  struct kobj_attribute *attr, char *buf)
 841 {
 842         const struct hccs_port_info *port = kobj_to_port_info(kobj);
 843         struct hccs_dev *hdev = port->die->chip->hdev;
 844         struct hccs_link_status link_status = {0};
 845         int ret;
 846
 847         mutex_lock(&hdev->lock);
 848         ret = hccs_query_port_link_status(hdev, port, &link_status);
 849         mutex_unlock(&hdev->lock);
 850         if (ret)
 851                 return ret;
 852
 853         return sysfs_emit(buf, "%u\n", link_status.lane_num);
 854 }
 855 static struct kobj_attribute cur_lane_num_attr = __ATTR_RO(cur_lane_num);
 856
 857 static ssize_t link_fsm_show(struct kobject *kobj,
 858                              struct kobj_attribute *attr, char *buf)
 859 {
 860         const struct hccs_port_info *port = kobj_to_port_info(kobj);
 861         struct hccs_dev *hdev = port->die->chip->hdev;
 862         struct hccs_link_status link_status = {0};
 863         const struct {
 864                 u8 link_fsm;
 865                 char *str;
 866         } link_fsm_map[] = {
 867                 {HCCS_PORT_RESET, "reset"},
 868                 {HCCS_PORT_SETUP, "setup"},
 869                 {HCCS_PORT_CONFIG, "config"},
 870                 {HCCS_PORT_READY, "link-up"},
 871         };
 872         const char *link_fsm_str = "unknown";
 873         size_t i;
 874         int ret;
 875
 876         mutex_lock(&hdev->lock);
 877         ret = hccs_query_port_link_status(hdev, port, &link_status);
 878         mutex_unlock(&hdev->lock);
 879         if (ret)
 880                 return ret;
 881
 882         for (i = 0; i < ARRAY_SIZE(link_fsm_map); i++) {
 883                 if (link_fsm_map[i].link_fsm == link_status.link_fsm) {
 884                         link_fsm_str = link_fsm_map[i].str;
 885                         break;
 886                 }
 887         }
 888
 889         return sysfs_emit(buf, "%s\n", link_fsm_str);
 890 }
 891 static struct kobj_attribute link_fsm_attr = __ATTR_RO(link_fsm);
 892
 893 static ssize_t lane_mask_show(struct kobject *kobj,
 894                               struct kobj_attribute *attr, char *buf)
 895 {
 896         const struct hccs_port_info *port = kobj_to_port_info(kobj);
 897         struct hccs_dev *hdev = port->die->chip->hdev;
 898         struct hccs_link_status link_status = {0};
 899         int ret;
 900
 901         mutex_lock(&hdev->lock);
 902         ret = hccs_query_port_link_status(hdev, port, &link_status);
 903         mutex_unlock(&hdev->lock);
 904         if (ret)
 905                 return ret;
 906
 907         return sysfs_emit(buf, "0x%x\n", link_status.lane_mask);
 908 }
 909 static struct kobj_attribute lane_mask_attr = __ATTR_RO(lane_mask);
 910
 911 static ssize_t crc_err_cnt_show(struct kobject *kobj,
 912                                 struct kobj_attribute *attr, char *buf)
 913 {
 914         const struct hccs_port_info *port = kobj_to_port_info(kobj);
 915         struct hccs_dev *hdev = port->die->chip->hdev;
 916         u64 crc_err_cnt;
 917         int ret;
 918
 919         mutex_lock(&hdev->lock);
 920         ret = hccs_query_port_crc_err_cnt(hdev, port, &crc_err_cnt);
 921         mutex_unlock(&hdev->lock);
 922         if (ret)
 923                 return ret;
 924
 925         return sysfs_emit(buf, "%llu\n", crc_err_cnt);
 926 }
 927 static struct kobj_attribute crc_err_cnt_attr = __ATTR_RO(crc_err_cnt);
 928
 929 static struct attribute *hccs_port_default_attrs[] = {
 930         &hccs_type_attr.attr,
 931         &lane_mode_attr.attr,
 932         &port_enable_attr.attr,
 933         &cur_lane_num_attr.attr,
 934         &link_fsm_attr.attr,
 935         &lane_mask_attr.attr,
 936         &crc_err_cnt_attr.attr,
 937         NULL,
 938 };
 939 ATTRIBUTE_GROUPS(hccs_port_default);
 940
 941 static const struct kobj_type hccs_port_type = {
 942         .sysfs_ops = &hccs_comm_ops,
 943         .default_groups = hccs_port_default_groups,
 944 };
 945
 946 static ssize_t all_linked_on_die_show(struct kobject *kobj,
 947                                       struct kobj_attribute *attr, char *buf)
 948 {
 949         const struct hccs_die_info *die = kobj_to_die_info(kobj);
 950         struct hccs_dev *hdev = die->chip->hdev;
 951         u8 all_linked;
 952         int ret;
 953
 954         mutex_lock(&hdev->lock);
 955         ret = hccs_get_die_all_link_status(hdev, die, &all_linked);
 956         mutex_unlock(&hdev->lock);
 957         if (ret)
 958                 return ret;
 959
 960         return sysfs_emit(buf, "%u\n", all_linked);
 961 }
 962 static struct kobj_attribute all_linked_on_die_attr =
 963                 __ATTR(all_linked, 0444, all_linked_on_die_show, NULL);
 964
 965 static ssize_t linked_full_lane_on_die_show(struct kobject *kobj,
 966                                             struct kobj_attribute *attr,
 967                                             char *buf)
 968 {
 969         const struct hccs_die_info *die = kobj_to_die_info(kobj);
 970         struct hccs_dev *hdev = die->chip->hdev;
 971         u8 full_lane;
 972         int ret;
 973
 974         mutex_lock(&hdev->lock);
 975         ret = hccs_get_die_all_port_lane_status(hdev, die, &full_lane);
 976         mutex_unlock(&hdev->lock);
 977         if (ret)
 978                 return ret;
 979
 980         return sysfs_emit(buf, "%u\n", full_lane);
 981 }
 982 static struct kobj_attribute linked_full_lane_on_die_attr =
 983         __ATTR(linked_full_lane, 0444, linked_full_lane_on_die_show, NULL);
 984
 985 static ssize_t crc_err_cnt_sum_on_die_show(struct kobject *kobj,
 986                                            struct kobj_attribute *attr,
 987                                            char *buf)
 988 {
 989         const struct hccs_die_info *die = kobj_to_die_info(kobj);
 990         struct hccs_dev *hdev = die->chip->hdev;
 991         u64 total_crc_err_cnt;
 992         int ret;
 993
 994         mutex_lock(&hdev->lock);
 995         ret = hccs_get_die_total_crc_err_cnt(hdev, die, &total_crc_err_cnt);
 996         mutex_unlock(&hdev->lock);
 997         if (ret)
 998                 return ret;
 999
1000         return sysfs_emit(buf, "%llu\n", total_crc_err_cnt);
1001 }
1002 static struct kobj_attribute crc_err_cnt_sum_on_die_attr =
1003         __ATTR(crc_err_cnt, 0444, crc_err_cnt_sum_on_die_show, NULL);
1004
1005 static struct attribute *hccs_die_default_attrs[] = {
1006         &all_linked_on_die_attr.attr,
1007         &linked_full_lane_on_die_attr.attr,
1008         &crc_err_cnt_sum_on_die_attr.attr,
1009         NULL,
1010 };
1011 ATTRIBUTE_GROUPS(hccs_die_default);
1012
1013 static const struct kobj_type hccs_die_type = {
1014         .sysfs_ops = &hccs_comm_ops,
1015         .default_groups = hccs_die_default_groups,
1016 };
1017
1018 static ssize_t all_linked_on_chip_show(struct kobject *kobj,
1019                                        struct kobj_attribute *attr, char *buf)
1020 {
1021         const struct hccs_chip_info *chip = kobj_to_chip_info(kobj);
1022         struct hccs_dev *hdev = chip->hdev;
1023         const struct hccs_die_info *die;
1024         u8 all_linked = 1;
1025         u8 i, tmp;
1026         int ret;
1027
1028         mutex_lock(&hdev->lock);
1029         for (i = 0; i < chip->die_num; i++) {
1030                 die = &chip->dies[i];
1031                 ret = hccs_get_die_all_link_status(hdev, die, &tmp);
1032                 if (ret) {
1033                         mutex_unlock(&hdev->lock);
1034                         return ret;
1035                 }
1036                 if (tmp != all_linked) {
1037                         all_linked = 0;
1038                         break;
1039                 }
1040         }
1041         mutex_unlock(&hdev->lock);
1042
1043         return sysfs_emit(buf, "%u\n", all_linked);
1044 }
1045 static struct kobj_attribute all_linked_on_chip_attr =
1046                 __ATTR(all_linked, 0444, all_linked_on_chip_show, NULL);
1047
1048 static ssize_t linked_full_lane_on_chip_show(struct kobject *kobj,
1049                                              struct kobj_attribute *attr,
1050                                              char *buf)
1051 {
1052         const struct hccs_chip_info *chip = kobj_to_chip_info(kobj);
1053         struct hccs_dev *hdev = chip->hdev;
1054         const struct hccs_die_info *die;
1055         u8 full_lane = 1;
1056         u8 i, tmp;
1057         int ret;
1058
1059         mutex_lock(&hdev->lock);
1060         for (i = 0; i < chip->die_num; i++) {
1061                 die = &chip->dies[i];
1062                 ret = hccs_get_die_all_port_lane_status(hdev, die, &tmp);
1063                 if (ret) {
1064                         mutex_unlock(&hdev->lock);
1065                         return ret;
1066                 }
1067                 if (tmp != full_lane) {
1068                         full_lane = 0;
1069                         break;
1070                 }
1071         }
1072         mutex_unlock(&hdev->lock);
1073
1074         return sysfs_emit(buf, "%u\n", full_lane);
1075 }
1076 static struct kobj_attribute linked_full_lane_on_chip_attr =
1077         __ATTR(linked_full_lane, 0444, linked_full_lane_on_chip_show, NULL);
1078
1079 static ssize_t crc_err_cnt_sum_on_chip_show(struct kobject *kobj,
1080                                             struct kobj_attribute *attr,
1081                                             char *buf)
1082 {
1083         const struct hccs_chip_info *chip = kobj_to_chip_info(kobj);
1084         u64 crc_err_cnt, total_crc_err_cnt = 0;
1085         struct hccs_dev *hdev = chip->hdev;
1086         const struct hccs_die_info *die;
1087         int ret;
1088         u16 i;
1089
1090         mutex_lock(&hdev->lock);
1091         for (i = 0; i < chip->die_num; i++) {
1092                 die = &chip->dies[i];
1093                 ret = hccs_get_die_total_crc_err_cnt(hdev, die, &crc_err_cnt);
1094                 if (ret) {
1095                         mutex_unlock(&hdev->lock);
1096                         return ret;
1097                 }
1098
1099                 total_crc_err_cnt += crc_err_cnt;
1100         }
1101         mutex_unlock(&hdev->lock);
1102
1103         return sysfs_emit(buf, "%llu\n", total_crc_err_cnt);
1104 }
1105 static struct kobj_attribute crc_err_cnt_sum_on_chip_attr =
1106                 __ATTR(crc_err_cnt, 0444, crc_err_cnt_sum_on_chip_show, NULL);
1107
1108 static struct attribute *hccs_chip_default_attrs[] = {
1109         &all_linked_on_chip_attr.attr,
1110         &linked_full_lane_on_chip_attr.attr,
1111         &crc_err_cnt_sum_on_chip_attr.attr,
1112         NULL,
1113 };
1114 ATTRIBUTE_GROUPS(hccs_chip_default);
1115
1116 static const struct kobj_type hccs_chip_type = {
1117         .sysfs_ops = &hccs_comm_ops,
1118         .default_groups = hccs_chip_default_groups,
1119 };
1120
1121 static void hccs_remove_die_dir(struct hccs_die_info *die)
1122 {
1123         struct hccs_port_info *port;
1124         u8 i;
1125
1126         for (i = 0; i < die->port_num; i++) {
1127                 port = &die->ports[i];
1128                 if (port->dir_created)
1129                         kobject_put(&port->kobj);
1130         }
1131
1132         kobject_put(&die->kobj);
1133 }
1134
1135 static void hccs_remove_chip_dir(struct hccs_chip_info *chip)
1136 {
1137         struct hccs_die_info *die;
1138         u8 i;
1139
1140         for (i = 0; i < chip->die_num; i++) {
1141                 die = &chip->dies[i];
1142                 if (die->dir_created)
1143                         hccs_remove_die_dir(die);
1144         }
1145
1146         kobject_put(&chip->kobj);
1147 }
1148
1149 static void hccs_remove_topo_dirs(struct hccs_dev *hdev)
1150 {
1151         u8 i;
1152
1153         for (i = 0; i < hdev->chip_num; i++)
1154                 hccs_remove_chip_dir(&hdev->chips[i]);
1155 }
1156
1157 static int hccs_create_hccs_dir(struct hccs_dev *hdev,
1158                                 struct hccs_die_info *die,
1159                                 struct hccs_port_info *port)
1160 {
1161         int ret;
1162
1163         ret = kobject_init_and_add(&port->kobj, &hccs_port_type,
1164                                    &die->kobj, "hccs%u", port->port_id);
1165         if (ret) {
1166                 kobject_put(&port->kobj);
1167                 return ret;
1168         }
1169
1170         return 0;
1171 }
1172
1173 static int hccs_create_die_dir(struct hccs_dev *hdev,
1174                                struct hccs_chip_info *chip,
1175                                struct hccs_die_info *die)
1176 {
1177         struct hccs_port_info *port;
1178         int ret;
1179         u16 i;
1180
1181         ret = kobject_init_and_add(&die->kobj, &hccs_die_type,
1182                                    &chip->kobj, "die%u", die->die_id);
1183         if (ret) {
1184                 kobject_put(&die->kobj);
1185                 return ret;
1186         }
1187
1188         for (i = 0; i < die->port_num; i++) {
1189                 port = &die->ports[i];
1190                 ret = hccs_create_hccs_dir(hdev, die, port);
1191                 if (ret) {
1192                         dev_err(hdev->dev, "create hccs%u dir failed.\n",
1193                                 port->port_id);
1194                         goto err;
1195                 }
1196                 port->dir_created = true;
1197         }
1198
1199         return 0;
1200 err:
1201         hccs_remove_die_dir(die);
1202
1203         return ret;
1204 }
1205
1206 static int hccs_create_chip_dir(struct hccs_dev *hdev,
1207                                 struct hccs_chip_info *chip)
1208 {
1209         struct hccs_die_info *die;
1210         int ret;
1211         u16 id;
1212
1213         ret = kobject_init_and_add(&chip->kobj, &hccs_chip_type,
1214                                    &hdev->dev->kobj, "chip%u", chip->chip_id);
1215         if (ret) {
1216                 kobject_put(&chip->kobj);
1217                 return ret;
1218         }
1219
1220         for (id = 0; id < chip->die_num; id++) {
1221                 die = &chip->dies[id];
1222                 ret = hccs_create_die_dir(hdev, chip, die);
1223                 if (ret)
1224                         goto err;
1225                 die->dir_created = true;
1226         }
1227
1228         return 0;
1229 err:
1230         hccs_remove_chip_dir(chip);
1231
1232         return ret;
1233 }
1234
1235 static int hccs_create_topo_dirs(struct hccs_dev *hdev)
1236 {
1237         struct hccs_chip_info *chip;
1238         u8 id, k;
1239         int ret;
1240
1241         for (id = 0; id < hdev->chip_num; id++) {
1242                 chip = &hdev->chips[id];
1243                 ret = hccs_create_chip_dir(hdev, chip);
1244                 if (ret) {
1245                         dev_err(hdev->dev, "init chip%u dir failed!\n", id);
1246                         goto err;
1247                 }
1248         }
1249
1250         return 0;
1251 err:
1252         for (k = 0; k < id; k++)
1253                 hccs_remove_chip_dir(&hdev->chips[k]);
1254
1255         return ret;
1256 }
1257
1258 static int hccs_probe(struct platform_device *pdev)
1259 {
1260         struct acpi_device *acpi_dev;
1261         struct hccs_dev *hdev;
1262         int rc;
1263
1264         if (acpi_disabled) {
1265                 dev_err(&pdev->dev, "acpi is disabled.\n");
1266                 return -ENODEV;
1267         }
1268         acpi_dev = ACPI_COMPANION(&pdev->dev);
1269         if (!acpi_dev)
1270                 return -ENODEV;
1271
1272         hdev = devm_kzalloc(&pdev->dev, sizeof(*hdev), GFP_KERNEL);
1273         if (!hdev)
1274                 return -ENOMEM;
1275         hdev->acpi_dev = acpi_dev;
1276         hdev->dev = &pdev->dev;
1277         platform_set_drvdata(pdev, hdev);
1278
1279         /*
1280          * Here would never be failure as the driver and device has been matched.
1281          */
1282         hdev->verspec_data = acpi_device_get_match_data(hdev->dev);
1283
1284         mutex_init(&hdev->lock);
1285         rc = hccs_get_pcc_chan_id(hdev);
1286         if (rc)
1287                 return rc;
1288         rc = hccs_register_pcc_channel(hdev);
1289         if (rc)
1290                 return rc;
1291
1292         rc = hccs_get_dev_caps(hdev);
1293         if (rc)
1294                 goto unregister_pcc_chan;
1295
1296         rc = hccs_get_hw_info(hdev);
1297         if (rc)
1298                 goto unregister_pcc_chan;
1299
1300         rc = hccs_create_topo_dirs(hdev);
1301         if (rc)
1302                 goto unregister_pcc_chan;
1303
1304         return 0;
1305
1306 unregister_pcc_chan:
1307         hccs_unregister_pcc_channel(hdev);
1308
1309         return rc;
1310 }
1311
1312 static void hccs_remove(struct platform_device *pdev)
1313 {
1314         struct hccs_dev *hdev = platform_get_drvdata(pdev);
1315
1316         hccs_remove_topo_dirs(hdev);
1317         hccs_unregister_pcc_channel(hdev);
1318 }
1319
1320 static const struct hccs_verspecific_data hisi04b1_verspec_data = {
1321         .rx_callback = NULL,
1322         .wait_cmd_complete = hccs_wait_cmd_complete_by_poll,
1323         .fill_pcc_shared_mem = hccs_fill_pcc_shared_mem_region,
1324         .shared_mem_size = sizeof(struct acpi_pcct_shared_memory),
1325         .has_txdone_irq = false,
1326 };
1327
1328 static const struct hccs_verspecific_data hisi04b2_verspec_data = {
1329         .rx_callback = hccs_pcc_rx_callback,
1330         .wait_cmd_complete = hccs_wait_cmd_complete_by_irq,
1331         .fill_pcc_shared_mem = hccs_fill_ext_pcc_shared_mem_region,
1332         .shared_mem_size = sizeof(struct acpi_pcct_ext_pcc_shared_memory),
1333         .has_txdone_irq = true,
1334 };
1335
1336 static const struct acpi_device_id hccs_acpi_match[] = {
1337         { "HISI04B1", (unsigned long)&hisi04b1_verspec_data},
1338         { "HISI04B2", (unsigned long)&hisi04b2_verspec_data},
1339         { }
1340 };
1341 MODULE_DEVICE_TABLE(acpi, hccs_acpi_match);
1342
1343 static struct platform_driver hccs_driver = {
1344         .probe = hccs_probe,
1345         .remove_new = hccs_remove,
1346         .driver = {
1347                 .name = "kunpeng_hccs",
1348                 .acpi_match_table = hccs_acpi_match,
1349         },
1350 };
1351
1352 module_platform_driver(hccs_driver);
1353
1354 MODULE_DESCRIPTION("Kunpeng SoC HCCS driver");
1355 MODULE_LICENSE("GPL");
1356 MODULE_AUTHOR("Huisong Li <lihuisong@huawei.com>");