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/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
* Copyright (C) 2005-2014, 2018-2021, 2024 Intel Corporation
* Copyright (C) 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2015 Intel Deutschland GmbH
*/
#ifndef __iwl_op_mode_h__
#define __iwl_op_mode_h__
#include <linux/netdevice.h>
#include <linux/debugfs.h>
#include "iwl-dbg-tlv.h"
struct iwl_op_mode;
struct iwl_trans;
struct sk_buff;
struct iwl_device_cmd;
struct iwl_rx_cmd_buffer;
struct iwl_fw;
struct iwl_cfg;
/**
* DOC: Operational mode - what is it ?
*
* The operational mode (a.k.a. op_mode) is the layer that implements
* mac80211's handlers. It knows two APIs: mac80211's and the fw's. It uses
* the transport API to access the HW. The op_mode doesn't need to know how the
* underlying HW works, since the transport layer takes care of that.
*
* There can be several op_mode: i.e. different fw APIs will require two
* different op_modes. This is why the op_mode is virtualized.
*/
/**
* DOC: Life cycle of the Operational mode
*
* The operational mode has a very simple life cycle.
*
* 1) The driver layer (iwl-drv.c) chooses the op_mode based on the
* capabilities advertised by the fw file (in TLV format).
* 2) The driver layer starts the op_mode (ops->start)
* 3) The op_mode registers mac80211
* 4) The op_mode is governed by mac80211
* 5) The driver layer stops the op_mode
*/
/**
* struct iwl_op_mode_ops - op_mode specific operations
*
* The op_mode exports its ops so that external components can start it and
* interact with it. The driver layer typically calls the start and stop
* handlers, the transport layer calls the others.
*
* All the handlers MUST be implemented, except @rx_rss which can be left
* out *iff* the opmode will never run on hardware with multi-queue capability.
*
* @start: start the op_mode. The transport layer is already allocated.
* May sleep
* @stop: stop the op_mode. Must free all the memory allocated.
* May sleep
* @rx: Rx notification to the op_mode. rxb is the Rx buffer itself. Cmd is the
* HCMD this Rx responds to. Can't sleep.
* @rx_rss: data queue RX notification to the op_mode, for (data) notifications
* received on the RSS queue(s). The queue parameter indicates which of the
* RSS queues received this frame; it will always be non-zero.
* This method must not sleep.
* @queue_full: notifies that a HW queue is full.
* Must be atomic and called with BH disabled.
* @queue_not_full: notifies that a HW queue is not full any more.
* Must be atomic and called with BH disabled.
* @hw_rf_kill: notifies of a change in the HW rf kill switch. True means that
* the radio is killed. Return %true if the device should be stopped by
* the transport immediately after the call. May sleep.
* Note that this must not return %true for newer devices using gen2 PCIe
* transport.
* @free_skb: allows the transport layer to free skbs that haven't been
* reclaimed by the op_mode. This can happen when the driver is freed and
* there are Tx packets pending in the transport layer.
* Must be atomic
* @nic_error: error notification. Must be atomic and must be called with BH
* disabled, unless the sync parameter is true.
* @cmd_queue_full: Called when the command queue gets full. Must be atomic and
* called with BH disabled.
* @nic_config: configure NIC, called before firmware is started.
* May sleep
* @wimax_active: invoked when WiMax becomes active. May sleep
* @time_point: called when transport layer wants to collect debug data
* @device_powered_off: called upon resume from hibernation but not only.
* Op_mode needs to reset its internal state because the device did not
* survive the system state transition. The firmware is no longer running,
* etc...
*/
struct iwl_op_mode_ops {
struct iwl_op_mode *(*start)(struct iwl_trans *trans,
const struct iwl_cfg *cfg,
const struct iwl_fw *fw,
struct dentry *dbgfs_dir);
void (*stop)(struct iwl_op_mode *op_mode);
void (*rx)(struct iwl_op_mode *op_mode, struct napi_struct *napi,
struct iwl_rx_cmd_buffer *rxb);
void (*rx_rss)(struct iwl_op_mode *op_mode, struct napi_struct *napi,
struct iwl_rx_cmd_buffer *rxb, unsigned int queue);
void (*queue_full)(struct iwl_op_mode *op_mode, int queue);
void (*queue_not_full)(struct iwl_op_mode *op_mode, int queue);
bool (*hw_rf_kill)(struct iwl_op_mode *op_mode, bool state);
void (*free_skb)(struct iwl_op_mode *op_mode, struct sk_buff *skb);
void (*nic_error)(struct iwl_op_mode *op_mode, bool sync);
void (*cmd_queue_full)(struct iwl_op_mode *op_mode);
void (*nic_config)(struct iwl_op_mode *op_mode);
void (*wimax_active)(struct iwl_op_mode *op_mode);
void (*time_point)(struct iwl_op_mode *op_mode,
enum iwl_fw_ini_time_point tp_id,
union iwl_dbg_tlv_tp_data *tp_data);
void (*device_powered_off)(struct iwl_op_mode *op_mode);
};
int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops);
void iwl_opmode_deregister(const char *name);
/**
* struct iwl_op_mode - operational mode
* @ops: pointer to its own ops
*
* This holds an implementation of the mac80211 / fw API.
*/
struct iwl_op_mode {
const struct iwl_op_mode_ops *ops;
char op_mode_specific[] __aligned(sizeof(void *));
};
static inline void iwl_op_mode_stop(struct iwl_op_mode *op_mode)
{
might_sleep();
op_mode->ops->stop(op_mode);
}
static inline void iwl_op_mode_rx(struct iwl_op_mode *op_mode,
struct napi_struct *napi,
struct iwl_rx_cmd_buffer *rxb)
{
return op_mode->ops->rx(op_mode, napi, rxb);
}
static inline void iwl_op_mode_rx_rss(struct iwl_op_mode *op_mode,
struct napi_struct *napi,
struct iwl_rx_cmd_buffer *rxb,
unsigned int queue)
{
op_mode->ops->rx_rss(op_mode, napi, rxb, queue);
}
static inline void iwl_op_mode_queue_full(struct iwl_op_mode *op_mode,
int queue)
{
op_mode->ops->queue_full(op_mode, queue);
}
static inline void iwl_op_mode_queue_not_full(struct iwl_op_mode *op_mode,
int queue)
{
op_mode->ops->queue_not_full(op_mode, queue);
}
static inline bool __must_check
iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode, bool state)
{
might_sleep();
return op_mode->ops->hw_rf_kill(op_mode, state);
}
static inline void iwl_op_mode_free_skb(struct iwl_op_mode *op_mode,
struct sk_buff *skb)
{
if (WARN_ON_ONCE(!op_mode))
return;
op_mode->ops->free_skb(op_mode, skb);
}
static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode, bool sync)
{
op_mode->ops->nic_error(op_mode, sync);
}
static inline void iwl_op_mode_cmd_queue_full(struct iwl_op_mode *op_mode)
{
op_mode->ops->cmd_queue_full(op_mode);
}
static inline void iwl_op_mode_nic_config(struct iwl_op_mode *op_mode)
{
might_sleep();
if (op_mode->ops->nic_config)
op_mode->ops->nic_config(op_mode);
}
static inline void iwl_op_mode_wimax_active(struct iwl_op_mode *op_mode)
{
might_sleep();
op_mode->ops->wimax_active(op_mode);
}
static inline void iwl_op_mode_time_point(struct iwl_op_mode *op_mode,
enum iwl_fw_ini_time_point tp_id,
union iwl_dbg_tlv_tp_data *tp_data)
{
if (!op_mode || !op_mode->ops || !op_mode->ops->time_point)
return;
op_mode->ops->time_point(op_mode, tp_id, tp_data);
}
static inline void iwl_op_mode_device_powered_off(struct iwl_op_mode *op_mode)
{
if (!op_mode || !op_mode->ops || !op_mode->ops->device_powered_off)
return;
op_mode->ops->device_powered_off(op_mode);
}
#endif /* __iwl_op_mode_h__ */
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