third_party/iwlwifi/fw/api/cmdhdr.h

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#ifndef SRC_CONNECTIVITY_WLAN_DRIVERS_THIRD_PARTY_INTEL_IWLWIFI_FW_API_CMDHDR_H_
#define SRC_CONNECTIVITY_WLAN_DRIVERS_THIRD_PARTY_INTEL_IWLWIFI_FW_API_CMDHDR_H_

#include <stdint.h>

#include "src/iwlwifi/platform/compiler.h"

/**
 * DOC: Host command section
 *
 * A host command is a command issued by the upper layer to the fw. There are
 * several versions of fw that have several APIs. The transport layer is
 * completely agnostic to these differences.
 * The transport does provide helper functionality (i.e. SYNC / ASYNC mode),
 */
#define SEQ_TO_QUEUE(s) (((s) >> 8) & 0x1f)
#define QUEUE_TO_SEQ(q) (((q)&0x1f) << 8)
#define SEQ_TO_INDEX(s) ((s)&0xff)
#define INDEX_TO_SEQ(i) ((i)&0xff)
#define SEQ_RX_FRAME cpu_to_le16(0x8000)

/*
 * those functions retrieve specific information from
 * the id field in the iwl_host_cmd struct which contains
 * the command id, the group id and the version of the command
 * and vice versa
 */
static inline uint8_t iwl_cmd_opcode(uint32_t cmdid) { return cmdid & 0xFF; }

static inline uint8_t iwl_cmd_groupid(uint32_t cmdid) { return ((cmdid & 0xFF00) >> 8); }

static inline uint8_t iwl_cmd_version(uint32_t cmdid) { return ((cmdid & 0xFF0000) >> 16); }

static inline uint32_t iwl_cmd_id(uint8_t opcode, uint8_t groupid, uint8_t version) {
  return opcode + (groupid << 8) + (version << 16);
}

/* make uint16_t wide id out of uint8_t group and opcode */
#define WIDE_ID(grp, opcode) ((uint16_t)(((grp) << 8) | (opcode)))
#define DEF_ID(opcode) ((uint16_t)((1 << 8) | (opcode)))

/* due to the conversion, this group is special; new groups
 * should be defined in the appropriate fw-api header files
 */
#define IWL_ALWAYS_LONG_GROUP 1

/**
 * struct iwl_cmd_header - (short) command header format
 *
 * This header format appears in the beginning of each command sent from the
 * driver, and each response/notification received from uCode.
 */
struct iwl_cmd_header {
  /**
   * @cmd: Command ID: REPLY_RXON, etc.
   */
  uint8_t cmd;
  /**
   * @group_id: group ID, for commands with groups
   */
  uint8_t group_id;
  /**
   * @sequence:
   * Sequence number for the command.
   *
   * The driver sets up the sequence number to values of its choosing.
   * uCode does not use this value, but passes it back to the driver
   * when sending the response to each driver-originated command, so
   * the driver can match the response to the command.  Since the values
   * don't get used by uCode, the driver may set up an arbitrary format.
   *
   * There is one exception:  uCode sets bit 15 when it originates
   * the response/notification, i.e. when the response/notification
   * is not a direct response to a command sent by the driver.  For
   * example, uCode issues REPLY_RX when it sends a received frame
   * to the driver; it is not a direct response to any driver command.
   *
   * The Linux driver uses the following format:
   *
   *  0:7     tfd index - position within TX queue
   *  8:12    TX queue id
   *  13:14   reserved
   *  15      unsolicited RX or uCode-originated notification
   */
  __le16 sequence;
} __packed;

/**
 * struct iwl_cmd_header_wide
 *
 * This header format appears in the beginning of each command sent from the
 * driver, and each response/notification received from uCode.
 * this is the wide version that contains more information about the command
 * like length, version and command type
 *
 * @cmd: command ID, like in &struct iwl_cmd_header
 * @group_id: group ID, like in &struct iwl_cmd_header
 * @sequence: sequence, like in &struct iwl_cmd_header
 * @length: length of the command
 * @reserved: reserved
 * @version: command version
 */
struct iwl_cmd_header_wide {
  uint8_t cmd;
  uint8_t group_id;
  __le16 sequence;
  __le16 length;
  uint8_t reserved;
  uint8_t version;
} __packed;

/**
 * struct iwl_calib_res_notif_phy_db - Receive phy db chunk after calibrations
 * @type: type of the result - mostly ignored
 * @length: length of the data
 * @data: data, length in @length
 */
struct iwl_calib_res_notif_phy_db {
  __le16 type;
  __le16 length;
  uint8_t data[0];
} __packed;

/**
 * struct iwl_phy_db_cmd - configure operational ucode
 * @type: type of the data
 * @length: length of the data
 * @data: data, length in @length
 */
struct iwl_phy_db_cmd {
  __le16 type;
  __le16 length;
  uint8_t data[];
} __packed;

/**
 * struct iwl_cmd_response - generic response struct for most commands
 * @status: status of the command asked, changes for each one
 */
struct iwl_cmd_response {
  __le32 status;
};

#endif  // SRC_CONNECTIVITY_WLAN_DRIVERS_THIRD_PARTY_INTEL_IWLWIFI_FW_API_CMDHDR_H_