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/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
* Copyright(c) 2015 Intel Deutschland GmbH
* Copyright(c) 2018 - 2019 Intel Corporation
*
* 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
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
* Copyright(c) 2015 Intel Deutschland GmbH
* Copyright(c) 2018 - 2019 Intel Corporation
* 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
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#ifndef __iwl_op_mode_h__
#define __iwl_op_mode_h__
#include <linux/netdevice.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 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.
* @async_cb: called when an ASYNC command with CMD_WANT_ASYNC_CALLBACK set
* completes. Must be atomic.
* @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.
* @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);
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 (*async_cb)(struct iwl_op_mode *op_mode,
const 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);
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);
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
* @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[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 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_async_cb(struct iwl_op_mode *op_mode,
const struct iwl_device_cmd *cmd)
{
if (op_mode->ops->async_cb)
op_mode->ops->async_cb(op_mode, 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 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)
{
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__ */
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