/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
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*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
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*****************************************************************************/
#ifndef __iwl_op_mode_h__
#define __iwl_op_mode_h__
#include <linux/debugfs.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 advertized by the fw file (in TLV format).
* 2) The driver layer starts the op_mode (ops->start)
* 3) The op_mode registers 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
*
* @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 the this Rx responds to.
* This callback may sleep, it is called from a threaded IRQ handler.
* @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. May sleep.
* @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.
* @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
*/
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);
int (*rx)(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd);
void (*queue_full)(struct iwl_op_mode *op_mode, int queue);
void (*queue_not_full)(struct iwl_op_mode *op_mode, int queue);
void (*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);
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);
};
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
*
* This holds an implementation of the mac80211 / fw API.
*
* @ops - pointer to its own ops
*/
struct iwl_op_mode {
const struct iwl_op_mode_ops *ops;
const struct iwl_trans *trans;
char op_mode_specific[0] __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 int iwl_op_mode_rx(struct iwl_op_mode *op_mode,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
might_sleep();
return op_mode->ops->rx(op_mode, rxb, cmd);
}
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 void iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode,
bool state)
{
might_sleep();
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)
{
op_mode->ops->free_skb(op_mode, skb);
}
static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode)
{
op_mode->ops->nic_error(op_mode);
}
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();
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);
}
#endif /* __iwl_op_mode_h__ */