iwl-drv.h

/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
 * Copyright (C) 2005-2014, 2020-2021, 2023, 2025 Intel Corporation
 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
 */
#ifndef __iwl_drv_h__
#define __iwl_drv_h__
#include <linux/export.h>
#include <kunit/visibility.h>

/* for all modules */
#define DRV_NAME        "iwlwifi"

/* radio config bits (actual values from NVM definition) */
#define NVM_RF_CFG_DASH_MSK(x)   (x & 0x3)         /* bits 0-1   */
#define NVM_RF_CFG_STEP_MSK(x)   ((x >> 2)  & 0x3) /* bits 2-3   */
#define NVM_RF_CFG_TYPE_MSK(x)   ((x >> 4)  & 0x3) /* bits 4-5   */
#define NVM_RF_CFG_PNUM_MSK(x)   ((x >> 6)  & 0x3) /* bits 6-7   */
#define NVM_RF_CFG_TX_ANT_MSK(x) ((x >> 8)  & 0xF) /* bits 8-11  */
#define NVM_RF_CFG_RX_ANT_MSK(x) ((x >> 12) & 0xF) /* bits 12-15 */

#define EXT_NVM_RF_CFG_FLAVOR_MSK(x)   ((x) & 0xF)
#define EXT_NVM_RF_CFG_DASH_MSK(x)   (((x) >> 4) & 0xF)
#define EXT_NVM_RF_CFG_STEP_MSK(x)   (((x) >> 8) & 0xF)
#define EXT_NVM_RF_CFG_TYPE_MSK(x)   (((x) >> 12) & 0xFFF)
#define EXT_NVM_RF_CFG_TX_ANT_MSK(x) (((x) >> 24) & 0xF)
#define EXT_NVM_RF_CFG_RX_ANT_MSK(x) (((x) >> 28) & 0xF)

/**
 * DOC: Driver system flows - drv component
 *
 * This component implements the system flows such as bus enumeration, bus
 * removal. Bus dependent parts of system flows (such as iwl_pci_probe) are in
 * bus specific files (transport files). This is the code that is common among
 * different buses.
 *
 * This component is also in charge of managing the several implementations of
 * the wifi flows: it will allow to have several fw API implementation. These
 * different implementations will differ in the way they implement mac80211's
 * handlers too.

 * The init flow wrt to the drv component looks like this:
 * 1) The bus specific component is called from module_init
 * 2) The bus specific component registers the bus driver
 * 3) The bus driver calls the probe function
 * 4) The bus specific component configures the bus
 * 5) The bus specific component calls to the drv bus agnostic part
 *    (iwl_drv_start)
 * 6) iwl_drv_start fetches the fw ASYNC, iwl_req_fw_callback
 * 7) iwl_req_fw_callback parses the fw file
 * 8) iwl_req_fw_callback starts the wifi implementation to matches the fw
 */

struct iwl_drv;
struct iwl_trans;
struct iwl_rf_cfg;
/**
 * iwl_drv_start - start the drv
 *
 * @trans: the transport
 *
 * starts the driver: fetches the firmware. This should be called by bus
 * specific system flows implementations. For example, the bus specific probe
 * function should do bus related operations only, and then call to this
 * function. It returns the driver object or %NULL if an error occurred.
 */
struct iwl_drv *iwl_drv_start(struct iwl_trans *trans);

/**
 * iwl_drv_stop - stop the drv
 *
 * @drv:
 *
 * Stop the driver. This should be called by bus specific system flows
 * implementations. For example, the bus specific remove function should first
 * call this function and then do the bus related operations only.
 */
void iwl_drv_stop(struct iwl_drv *drv);

/*
 * exported symbol management
 *
 * The driver can be split into multiple modules, in which case some symbols
 * must be exported for the sub-modules. However, if it's not split and
 * everything is built-in, then we can avoid that.
 */
#ifdef CONFIG_IWLWIFI_OPMODE_MODULAR
#define IWL_EXPORT_SYMBOL(sym)	EXPORT_SYMBOL_NS_GPL(sym, "IWLWIFI")
#else
#define IWL_EXPORT_SYMBOL(sym)
#endif

#if IS_ENABLED(CONFIG_IWLWIFI_KUNIT_TESTS)
#define EXPORT_SYMBOL_IF_IWLWIFI_KUNIT(sym)	EXPORT_SYMBOL_IF_KUNIT(sym)
#define VISIBLE_IF_IWLWIFI_KUNIT
#else
#define EXPORT_SYMBOL_IF_IWLWIFI_KUNIT(sym)
#define VISIBLE_IF_IWLWIFI_KUNIT static
#endif

/* max retry for init flow */
#define IWL_MAX_INIT_RETRY 2

#define FW_NAME_PRE_BUFSIZE	64
struct iwl_trans;
const char *iwl_drv_get_fwname_pre(struct iwl_trans *trans, char *buf);

#endif /* __iwl_drv_h__ */