/******************************************************************************
 *
 * Copyright(c) 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/

#include "src/iwlwifi/iwl-trans.h"

#include "src/iwlwifi/iwl-constants.h"
#include "src/iwlwifi/iwl-drv.h"
#include "src/iwlwifi/iwl-fh.h"

struct iwl_trans* iwl_trans_alloc(unsigned int priv_size, struct device* dev,
                                  const struct iwl_cfg* cfg, struct iwl_trans_ops* ops) {
  struct iwl_trans* trans;

  trans = calloc(1, sizeof(*trans) + priv_size);
  if (!trans) {
    IWL_ERR(trans, "Failed to allocate transport\n");
    return NULL;
  }

  trans->dev = dev;
  trans->cfg = cfg;
  trans->ops = ops;
  trans->num_rx_queues = 1;

  WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);

  return trans;
}

void iwl_trans_free(struct iwl_trans* trans) { free(trans); }

zx_status_t iwl_trans_send_cmd(struct iwl_trans* trans, struct iwl_host_cmd* cmd) {
  zx_status_t ret;

  if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
               test_bit(STATUS_RFKILL_OPMODE, &trans->status))) {
    return ZX_ERR_BAD_STATE;
  }

  if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) {
    return ZX_ERR_IO;
  }

  if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
    IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
    return ZX_ERR_IO;
  }

  if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) && !(cmd->flags & CMD_ASYNC))) {
    return ZX_ERR_IO_INVALID;
  }

  if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id)) {
    cmd->id = DEF_ID(cmd->id);
  }

  ret = trans->ops->send_cmd(trans, cmd);

  if (WARN_ON((cmd->flags & CMD_WANT_SKB) && !ret && !cmd->resp_pkt)) {
    return ZX_ERR_IO;
  }

  return ret;
}

/* Comparator for struct iwl_hcmd_names.
 * Used in the binary search over a list of host commands.
 *
 * @key: command_id that we're looking for.
 * @elt: struct iwl_hcmd_names candidate for match.
 *
 * @return 0 iff equal.
 */
static int iwl_hcmd_names_cmp(const void* key, const void* elt) {
  const struct iwl_hcmd_names* name = elt;
  uint8_t cmd1 = *(uint8_t*)key;
  uint8_t cmd2 = name->cmd_id;

  return (cmd1 - cmd2);
}

const char* iwl_get_cmd_string(struct iwl_trans* trans, uint32_t id) {
  uint8_t grp, cmd;
  struct iwl_hcmd_names* ret;
  const struct iwl_hcmd_arr* arr;
  size_t size = sizeof(struct iwl_hcmd_names);

  grp = iwl_cmd_groupid(id);
  cmd = iwl_cmd_opcode(id);

  if (!trans->command_groups || grp >= trans->command_groups_size ||
      !trans->command_groups[grp].arr) {
    return "UNKNOWN";
  }

  arr = &trans->command_groups[grp];
  ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp);
  if (!ret) {
    return "UNKNOWN";
  }
  return ret->cmd_name;
}

int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config* trans) {
  int i, j;
  const struct iwl_hcmd_arr* arr;

  for (i = 0; i < trans->command_groups_size; i++) {
    arr = &trans->command_groups[i];
    if (!arr->arr) {
      continue;
    }
    for (j = 0; j < arr->size - 1; j++) {
      if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id) {
        return -1;
      }
    }
  }
  return 0;
}

void iwl_trans_ref(struct iwl_trans* trans) {
  if (trans->ops->ref) {
    trans->ops->ref(trans);
  }
}

void iwl_trans_unref(struct iwl_trans* trans) {
  if (trans->ops->unref) {
    trans->ops->unref(trans);
  }
}